Technical drawing , drafting or drawing , is the act and discipline of composing drawings that visually communicate how something functions or is constructed.
96-411: Technical drawing is essential for communicating ideas in industry and engineering . To make the drawings easier to understand, people use familiar symbols , perspectives , units of measurement , notation systems, visual styles, and page layout . Together, such conventions constitute a visual language and help to ensure that the drawing is unambiguous and relatively easy to understand. Many of
192-405: A conceptual model . Practitioners reported that diagramming helped with analysing requirements , design, refactoring , documentation, onboarding , communication with stake holders. Diagrams are often transient or redrawn as required. Redrawn diagrams can act as a form of shared understanding in a team. Technical illustration is the use of illustration to visually communicate information of
288-457: A drafting machine that is supported on both sides of the table to slide over a large piece of paper. Because it is secured on both sides, lines drawn along the edge are guaranteed to be parallel. The drafter uses several technical drawing tools to draw curves and circles. Primary among these are the compasses , used for drawing arcs and circles, and the French curve , for drawing curves. A spline
384-463: A model and can produce it in a variety of materials and in any desired size, was invented by inventor and steam pioneer James Watt and perfected by Benjamin Cheverton in 1836. Cheverton's machine was fitted with a rotating cutting bit to carve reduced versions of well-known sculptures. A three-dimensional pantograph can also be used to enlarge sculpture by interchanging the position of the model and
480-474: A Competitive Industrial Performance (CIP) Index, which measures the competitive manufacturing ability of different nations. The CIP Index combines a nation's gross manufacturing output with other factors like high-tech capability and the nation's impact on the world economy. Germany topped the 2020 CIP Index, followed by China, South Korea , the United States, and Japan. In 2023, the manufacturing industry in
576-442: A composition before a more finished work, especially when the finished work is expensive and time-consuming. Architectural sketches, for example, are a kind of diagram . These sketches, like metaphors , are used by architects as a means of communication in aiding design collaboration. This tool helps architects to abstract attributes of hypothetical provisional design solutions and summarize their complex patterns, thereby enhancing
672-401: A drawing may also be useful in the case of many processes. The drawing must show every feature of the invention specified in the claims and is required by the patent office rules to be in a particular form. The Office specifies the size of the sheet on which the drawing is made, the type of paper, the margins, and other details relating to the making of the drawing. The reason for specifying
768-505: A human's accuracy and precision ) or to trace a cam, template, or model in some way, and have the cutter mimic the movement of the tracing stylus. If the milling head was mounted on a pantograph, a duplicate part could be cut (and at various scales of magnification besides 1:1) simply by tracing a template. (The template itself was usually made by a tool and die maker using toolroom methods, including milling via dialing followed by hand sculpting with files and/or die grinder points.) This
864-409: A large scale. Such goods may be sold to other manufacturers for the production of other more complex products (such as aircraft, household appliances , furniture, sports equipment or automobiles ), or distributed via the tertiary industry to end users and consumers (usually through wholesalers, who in turn sell to retailers, who then sell them to individual customers). Manufacturing engineering
960-472: A master copy. Edison , Bettini , Leon Douglass and others solved this problem (partly) by mechanically linking a cutting stylus and a playback stylus together and copying the "hill-and-dale" grooves of the cylinder mechanically. When molding improved somewhat, molded cylinders were used as pantograph masters. This was employed by Edison and Columbia in 1898, and was used until about January 1902 (Columbia brown waxes after this were molded). Some companies like
1056-472: A master cylinder were to mold the cylinders (which was slow and, early on, produced very poor copies), or to acoustically copy the sound by placing the horns of two phonographs together or to hook the two together with a rubber tube (one phonograph recording and the other playing the cylinder back). Instead of copying a master cylinder, the other alternative was to record a performance to multiple gramophones simultaneously, over and over again, making each cylinder
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#17328833732391152-416: A new way to control the movement of the milling cutter: via feeding information from a program to actuators ( servos , selsyns , leadscrews , machine slides, spindles , and so on) that would move the cutter as the information directed. Today most commercial machining is done via such programmable, computerized methods. Home machinists are likely to work via manual control, but computerized control has reached
1248-461: A pantograph (with the scale determined by the adjustable arm lengths), it is achieved in CNC via mathematic calculations that the computer applies to the program information practically instantaneously. Scaling functions (as well as mirroring functions) are built into languages such as G-code . In another application similar to drafting, the pantograph is incorporated into a pantograph engraving machine with
1344-405: A pantograph to copy and scale diagrams, and wrote about the invention over 27 years later, in "Pantographice seu Ars delineandi res quaslibet per parallelogrammum lineare seu cavum" (Rome 1631). One arm of the pantograph contained a small pointer, while the other held a drawing implement, and by moving the pointer over a diagram, a copy of the diagram was drawn on another piece of paper. By changing
1440-447: A pantograph, paper pattern, with a laser pointer to stitch a custom pattern onto the quilt. Digitized pantographs are followed by computerized machines. Linn Boyd Benton invented a pantographic engraving machine for type design, which was capable not only of scaling a single font design pattern to a variety of sizes, but could also condense, extend, and slant the design (mathematically, these are cases of affine transformation , which
1536-408: A part. Pantographs are no longer commonly used in modern engraving, with computerized laser and rotary engraving taking favor. The device which maintains electrical contact with the contact wire and transfers power from the wire to the traction unit , used in electric locomotives and trams , is also called a " pantograph ". Herman Hollerith 's "Keyboard punch" used for the 1890 U.S. Census
1632-542: A parts list, often referred to as a bill of materials. In a technical service manual, this type of drawing may be referred to as an exploded view drawing or diagram. These parts may be used in engineering. Also called As-Built drawings or As-made drawings . As-fitted drawings represent a record of the completed works, literally 'as fitted'. These are based upon the working drawings and updated to reflect any changes or alterations undertaken during construction or manufacture. Manufacturing Manufacturing
1728-494: A point require a number of moves of the T-square and triangles, and in general, drafting can be a time-consuming process. A solution to these problems was the introduction of the mechanical "drafting machine", an application of the pantograph (sometimes referred to incorrectly as a "pentagraph" in these situations) which allowed the drafter to have an accurate right angle at any point on the page quickly. These machines often included
1824-581: A product. Some industries, such as semiconductor and steel manufacturers, use the term fabrication instead. The manufacturing sector is closely connected with the engineering and industrial design industries. The Modern English word manufacture is likely derived from the Middle French manufacture ("process of making") which itself originates from the Classical Latin manū ("hand") and Middle French facture ("making"). Alternatively,
1920-567: A result, they make only a reactive contribution. Emerging technologies have offered new growth methods in advanced manufacturing employment opportunities, for example in the Manufacturing Belt in the United States. Manufacturing provides important material support for national infrastructure and also for national defense . On the other hand, most manufacturing processes may involve significant social and environmental costs. The clean-up costs of hazardous waste , for example, may outweigh
2016-416: A revolving cutter instead of a pen, and a tray at the pointer end to fix precut lettered plates (referred to as 'copy'), which the pointer follows and thus the cutter, via the pantograph, reproduces the 'copy' at a ratio to which the pantograph arms have been set. The typical range of ratio is Maximum 1:1 Minimum 50:1 (reduction) In this way machinists can neatly and accurately engrave numbers and letters onto
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#17328833732392112-517: A technical nature. Technical illustrations can be component technical drawings or diagrams . The aim of technical illustration is "to generate expressive images that effectively convey certain information via the visual channel to the human observer". The main purpose of technical illustration is to describe or explain these items to a more or less nontechnical audience. The visual image should be accurate in terms of dimensions and proportions, and should provide "an overall impression of what an object
2208-468: A three-dimensional object onto a two-dimensional surface. Two-dimensional representation uses orthographic projection to create an image where only two of the three dimensions of the object are seen. In a three-dimensional representation, also referred to as a pictorial, all three dimensions of an object are visible. Multiview is a type of orthographic projection . There are two conventions for using multiview, first-angle and third-angle. In both cases,
2304-572: A very broad term. It stems from the Latin ingenerare , meaning "to create". Because this could apply to everything that humans create, it is given a narrower definition in the context of technical drawing. Engineering drawings generally deal with mechanical engineered items, such as manufactured parts and equipment. Engineering drawings are usually created in accordance with standardized conventions for layout, nomenclature, interpretation, appearance (such as typefaces and line styles), size, etc. Its purpose
2400-402: A visual appearance as if someone had cutout a piece of the object or sliced it into parts. Cutaway illustrations avoid ambiguities with respect to spatial ordering, provide a sharp contrast between foreground and background objects, and facilitate a good understanding of spatial ordering". The two types of technical drawings are based on graphical projection . This is used to create an image of
2496-636: A wood, bone, or antler punch could be used to shape a stone very finely was developed during the Upper Paleolithic , beginning approximately 40,000 years ago. During the Neolithic period, polished stone tools were manufactured from a variety of hard rocks such as flint , jade , jadeite , and greenstone . The polished axes were used alongside other stone tools including projectiles , knives, and scrapers, as well as tools manufactured from organic materials such as wood, bone, and antler. Copper smelting
2592-611: Is a mechanical linkage connected in a manner based on parallelograms so that the movement of one pen, in tracing an image, produces identical movements in a second pen. If a line drawing is traced by the first point, an identical, enlarged, or miniaturized copy will be drawn by a pen fixed to the other. Using the same principle, different kinds of pantographs are used for other forms of duplication in areas such as sculpting , minting , engraving , and milling . The ancient Greek engineer Hero of Alexandria described pantographs in his work Mechanics . In 1603, Christoph Scheiner used
2688-414: Is a person who makes a drawing (technical or expressive). A professional drafter who makes technical drawings is sometimes called a drafting technician. A sketch is a quickly executed, freehand drawing that is usually not intended as a finished work. In general, sketching is a quick way to record an idea for later use. Architect's sketches primarily serve as a way to try out different ideas and establish
2784-468: Is a rubber coated articulated metal that can be manually bent to most curves. Drafting templates assist the drafter with creating recurring objects in a drawing without having to reproduce the object from scratch every time. This is especially useful when using common symbols; i.e. in the context of stagecraft , a lighting designer will draw from the USITT standard library of lighting fixture symbols to indicate
2880-525: Is a technical drawing of an object that shows the relationship or order of assembly of the various parts. It shows the components of an object slightly separated by distance or suspended in surrounding space in the case of a three- dimensional exploded diagram. An object is represented as if there had been a small controlled explosion emanating from the middle of the object, causing the object's parts to be separated relative distances away from their original locations. An exploded view drawing (EVD) can show
2976-502: Is believed to have originated when the technology of pottery kiln allowed sufficiently high temperatures. The concentration of various elements such as arsenic increase with depth in copper ore deposits and smelting of these ores yields arsenical bronze , which can be sufficiently work-hardened to be suitable for manufacturing tools. Bronze is an alloy of copper with tin; the latter of which being found in relatively few deposits globally delayed true tin bronze becoming widespread. During
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3072-484: Is conventionally defined by the widespread manufacturing of weapons and tools using iron and steel rather than bronze. Iron smelting is more difficult than tin and copper smelting because smelted iron requires hot-working and can be melted only in specially designed furnaces. The place and time for the discovery of iron smelting is not known, partly because of the difficulty of distinguishing metal extracted from nickel-containing ores from hot-worked meteoritic iron. During
3168-407: Is known as architecture . To communicate all aspects of the shape or design, detail drawings are used. In this field, the term plan is often used when referring to the full section view of these drawings as viewed from three feet above finished floor to show the locations of doorways, windows, stairwells, etc. Architectural drawings describe and document an architect's design. Engineering can be
3264-492: Is merely an electronic drawing board. Its greatest strength over direct to paper technical drawing is in the making of revisions. Whereas in a conventional hand drawn technical drawing, if a mistake is found, or a modification is required, a new drawing must be made from scratch, the 2D CAD system allows a copy of the original to be modified, saving considerable time. 2D CAD systems can be used to create plans for large projects such as buildings and aircraft but provide no way to check
3360-482: Is or does, to enhance the viewer's interest and understanding". According to Viola (2005), "illustrative techniques are often designed in a way that even a person with no technical understanding clearly understands the piece of art. The use of varying line widths to emphasize mass, proximity, and scale helped to make a simple line drawing more understandable to the lay person. Cross hatching, stippling, and other low abstraction techniques gave greater depth and dimension to
3456-416: Is seen is actually the left side of the object and will be drawn to the left of the front side. While multiview relates to external surfaces of an object, section views show an imaginary plane cut through an object. This is often useful to show voids in an object. Auxiliary views utilize an additional projection plane other than the common planes in a multiview. Since the features of an object need to show
3552-418: Is sometimes accomplished by a project engineer, architect, or shop personnel (such as a machinist ), skilled drafters (and/or designers) usually accomplish the task, and are always in demand to some degree. Today, the mechanics of the drafting task have largely been automated and accelerated through the use of computer-aided design systems (CAD). There are two types of computer-aided design systems used for
3648-455: Is the creation or production of goods with the help of equipment, labor , machines , tools , and chemical or biological processing or formulation . It is the essence of the secondary sector of the economy . The term may refer to a range of human activity , from handicraft to high-tech , but it is most commonly applied to industrial design , in which raw materials from the primary sector are transformed into finished goods on
3744-459: Is the field of engineering that designs and optimizes the manufacturing process , or the steps through which raw materials are transformed into a final product . The manufacturing process begins with the product design , and materials specification . These materials are then modified through manufacturing to become the desired product. Contemporary manufacturing encompasses all intermediary stages involved in producing and integrating components of
3840-489: Is to accurately and unambiguously capture all the geometric features of a product or a component. The end goal of an engineering drawing is to convey all the required information that will allow a manufacturer to produce that component. Software engineering practitioners make use of diagrams for designing software. Formal standards and modelling languages such as Unified Modelling Language (UML) exist but most diagramming happens using informal ad hoc diagrams that illustrate
3936-539: Is up to individuals to produce the drawings to a standard. There is no definitive standard for layout or style. The only standard across engineering workshop drawings is in the creation of orthographic projections and cross-section views. In representing complex, three-dimensional objects in two-dimensional drawings, the objects can be described by at least one view plus material thickness note, 2, 3 or as many views and sections that are required to show all features of object. The art and design that goes into making buildings
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4032-493: The Bronze Age , bronze was a major improvement over stone as a material for making tools, both because of its mechanical properties like strength and ductility and because it could be cast in molds to make intricately shaped objects. Bronze significantly advanced shipbuilding technology with better tools and bronze nails, which replaced the old method of attaching boards of the hull with cord woven through drilled holes. The Iron Age
4128-594: The Oldowan " industry ", date back to at least 2.3 million years ago, with the earliest direct evidence of tool usage found in Ethiopia within the Great Rift Valley , dating back to 2.5 million years ago. To manufacture a stone tool, a " core " of hard stone with specific flaking properties (such as flint ) was struck with a hammerstone . This flaking produced sharp edges that could be used as tools, primarily in
4224-478: The United States Phonograph Company of Newark, New Jersey , supplied cylinder masters for smaller companies so that they could duplicate them, sometimes pantographically. Pantographs could turn out about 30 records per day and produce up to about 150 records per master. In theory, pantograph masters could be used for 200 or 300 duplicates if the master and the duplicate were running in reverse and
4320-422: The 1830s. This transition included going from hand production methods to machines, new chemical manufacturing and iron production processes, the increasing use of steam power and water power , the development of machine tools and the rise of the mechanized factory system . The Industrial Revolution also led to an unprecedented rise in the rate of population growth. Textiles were the dominant industry of
4416-475: The 1890s after the introduction of the practical DC motor and the AC motor , was fastest between 1900 and 1930. This was aided by the establishment of electric utilities with central stations and the lowering of electricity prices from 1914 to 1917. Electric motors allowed more flexibility in manufacturing and required less maintenance than line shafts and belts. Many factories witnessed a 30% increase in output owing to
4512-527: The 8th century. Papermaking technology was spread to Europe by the Umayyad conquest of Hispania . A paper mill was established in Sicily in the 12th century. In Europe the fiber to make pulp for making paper was obtained from linen and cotton rags. Lynn Townsend White Jr. credited the spinning wheel with increasing the supply of rags, which led to cheap paper, which was a factor in the development of printing. Due to
4608-635: The CEO of General Electric , called for the United States to increase its manufacturing base employment to 20% of the workforce, commenting that the U.S. has outsourced too much in some areas and can no longer rely on the financial sector and consumer spending to drive demand. Further, while U.S. manufacturing performs well compared to the rest of the U.S. economy, research shows that it performs poorly compared to manufacturing in other high-wage countries. A total of 3.2 million – one in six U.S. manufacturing jobs – have disappeared between 2000 and 2007. In
4704-500: The English word may have been independently formed from the earlier English manufacture ("made by human hands") and fracture . Its earliest usage in the English language was recorded in the mid-16th century to refer to the making of products by hand. Human ancestors manufactured objects using stone and other tools long before the emergence of Homo sapiens about 200,000 years ago. The earliest methods of stone tool making, known as
4800-545: The Industrial Revolution in terms of employment, value of output and capital invested. The textile industry was also the first to use modern production methods. Rapid industrialization first began in Britain, starting with mechanized spinning in the 1780s, with high rates of growth in steam power and iron production occurring after 1800. Mechanized textile production spread from Great Britain to continental Europe and
4896-600: The Mediterranean basin. Early construction techniques used by the Ancient Egyptians made use of bricks composed mainly of clay, sand, silt, and other minerals. The Middle Ages witnessed new inventions, innovations in the ways of managing traditional means of production, and economic growth. Papermaking , a 2nd-century Chinese technology, was carried to the Middle East when a group of Chinese papermakers were captured in
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#17328833732394992-414: The T-square and running a pencil or technical pen along the T-square's edge. The T-square is used to hold other devices such as set squares or triangles. In this case, the drafter places one or more triangles of known angles on the T-square — which is itself at right angles to the edge of the table — and can then draw lines at any chosen angle to others on the page. Modern drafting tables are equipped with
5088-671: The UK, EEF the manufacturers organisation has led calls for the UK economy to be rebalanced to rely less on financial services and has actively promoted the manufacturing agenda. According to the United Nations Industrial Development Organization (UNIDO), China is the top manufacturer worldwide by 2023 output, producing 28.7% of the total global manufacturing output, followed by the United States of America , Germany , Japan , and India . UNIDO also publishes
5184-674: The United States accounted for 10.70% of the total national output, employing 8.41% of the workforce. The total value of manufacturing output reached $ 2.5 trillion. In 2023, Germany's manufacturing output reached $ 844.93 billion, marking a 12.25% increase from 2022. The sector employed approximately 5.5 million people, accounting for around 20.8% of the workforce. These are the top 50 countries by total value of manufacturing output in U.S. dollars for its noted year according to World Bank : Pantograph A pantograph (from Greek παντ- 'all, every' and γραφ- 'to write', from their original use for copying writing)
5280-518: The United States in the early 19th century, with important centres of textiles, iron and coal emerging in Belgium and the United States and later textiles in France. An economic recession occurred from the late 1830s to the early 1840s when the adoption of the Industrial Revolution's early innovations, such as mechanized spinning and weaving, slowed down and their markets matured. Innovations developed late in
5376-456: The ability to change the angle, hence removing the need for the triangles. In addition to the mastery of the mechanics of drawing lines, arcs and circles (and text) onto a piece of paper—with respect to the detailing of physical objects—the drafting effort requires a thorough understanding of geometry, trigonometry and spatial comprehension, and in all cases demands precision and accuracy, and attention to detail of high order. Although drafting
5472-445: The benefits of a product that creates it. Hazardous materials may expose workers to health risks. These costs are now well known and there is effort to address them by improving efficiency , reducing waste, using industrial symbiosis , and eliminating harmful chemicals. The negative costs of manufacturing can also be addressed legally. Developed countries regulate manufacturing activity with labor laws and environmental laws. Across
5568-512: The casting of cannon, the blast furnace came into widespread use in France in the mid 15th century. The blast furnace had been used in China since the 4th century BC. The stocking frame , which was invented in 1598, increased a knitter's number of knots per minute from 100 to 1000. The Industrial Revolution was the transition to new manufacturing processes in Europe and the United States from 1760 to
5664-568: The concept of "focus", with an implication that a business cannot perform at the highest level along all five dimensions and must therefore select one or two competitive priorities. This view led to the theory of "trade offs" in manufacturing strategy. Similarly, Elizabeth Haas wrote in 1987 about the delivery of value in manufacturing for customers in terms of "lower prices, greater service responsiveness or higher quality". The theory of "trade offs" has subsequently being debated and questioned, but Skinner wrote in 1992 that at that time "enthusiasm for
5760-451: The concepts of 'manufacturing strategy' [had] been higher", noting that in academic papers , executive courses and case studies , levels of interest were "bursting out all over". Manufacturing writer Terry Hill has commented that manufacturing is often seen as a less "strategic" business activity than functions such as marketing and finance , and that manufacturing managers have "come late" to business strategy-making discussions, where, as
5856-405: The copy. Another version is still very much in use to reduce the size of large relief designs for coins down to the required size of the coin. One advantage of phonograph and gramophone discs over cylinders in the 1890s—before electronic amplification was available—was that large numbers of discs could be stamped quickly and cheaply. In 1890, the only ways of manufacturing copies of
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#17328833732395952-405: The design process. The basic drafting procedure is to place a piece of paper (or other material) on a smooth surface with right-angle corners and straight sides—typically a drawing board . A sliding straightedge known as a T-square is then placed on one of the sides, allowing it to be slid across the side of the table, and over the surface of the paper. "Parallel lines" can be drawn by moving
6048-402: The form of choppers or scrapers . These tools greatly aided the early humans in their hunter-gatherer lifestyle to form other tools out of softer materials such as bone and wood. The Middle Paleolithic , approximately 300,000 years ago, saw the introduction of the prepared-core technique , where multiple blades could be rapidly formed from a single core stone. Pressure flaking , in which
6144-412: The front or main side of the object is the same. First-angle is drawing the object sides based on where they land. Example, looking at the front side, rotate the object 90 degrees to the right. What is seen will be drawn to the right of the front side. Third-angle is drawing the object sides based on where they are. Example, looking at the front side, rotate the object 90 degrees to the right. What
6240-481: The globe, manufacturers can be subject to regulations and pollution taxes to offset the environmental costs of manufacturing activities . Labor unions and craft guilds have played a historic role in the negotiation of worker rights and wages. Environment laws and labor protections that are available in developed nations may not be available in the third world . Tort law and product liability impose additional costs on manufacturing. These are significant dynamics in
6336-601: The growth of the ancient civilizations, many ancient technologies resulted from advances in manufacturing. Several of the six classic simple machines were invented in Mesopotamia. Mesopotamians have been credited with the invention of the wheel. The wheel and axle mechanism first appeared with the potter's wheel , invented in Mesopotamia (modern Iraq) during the 5th millennium BC. Egyptian paper made from papyrus , as well as pottery , were mass-produced and exported throughout
6432-400: The home-shop level as well (it is just not yet as pervasive as its commercial counterparts). Thus pantograph milling machines are largely a thing of the past. They are still in commercial use, but at a greatly reduced and ever-dwindling level. They are no longer built new by machine tool builders, but a small market for used machines still exists. As for the magnification-and-reduction feature of
6528-582: The increasing shift to electric motors. Electrification enabled modern mass production, and the biggest impact of early mass production was in the manufacturing of everyday items, such as at the Ball Brothers Glass Manufacturing Company , which electrified its mason jar plant in Muncie, Indiana , U.S. around 1900. The new automated process used glass blowing machines to replace 210 craftsman glass blowers and helpers. A small electric truck
6624-407: The industry in the United States and other countries. According to a "traditional" view of manufacturing strategy, there are five key dimensions along which the performance of manufacturing can be assessed: cost, quality , dependability , flexibility and innovation . In regard to manufacturing performance, Wickham Skinner , who has been called "the father of manufacturing strategy ", adopted
6720-431: The intended assembly of mechanical or other parts. In mechanical systems, the component closest to the center is usually assembled first or is the main part inside which the other parts are assembled. The EVD can also help to represent the disassembly of parts, where those on the outside are normally removed first. There have been many standard sizes of paper at different times and in different countries, but today most of
6816-405: The large-scale manufacture of machine tools and the use of increasingly advanced machinery in steam-powered factories. Building on improvements in vacuum pumps and materials research, incandescent light bulbs became practical for general use in the late 1870s. This invention had a profound effect on the workplace because factories could now have second and third shift workers. Shoe production
6912-704: The market towards end customers . This relative cost reduction towards the market, is how manufacturing firms secure their profit margins . Manufacturing has unique health and safety challenges and has been recognized by the National Institute for Occupational Safety and Health (NIOSH) as a priority industry sector in the National Occupational Research Agenda (NORA) to identify and provide intervention strategies regarding occupational health and safety issues. Surveys and analyses of trends and issues in manufacturing and investment around
7008-423: The ongoing process, occurring over the last few decades, of manufacture-based industries relocating operations to "developing-world" economies where the costs of production are significantly lower than in "developed-world" economies. From a financial perspective, the goal of the manufacturing industry is mainly to achieve cost benefits per unit produced, which in turn leads to cost reductions in product prices for
7104-472: The pantograph was for copying and scaling line drawings . Modern versions are sold as technical toys. Sculptors use a three-dimensional version of the pantograph, usually a large boom connected to a fixed point at one end, bearing two rotating pointing needles at arbitrary points along this boom. By adjusting the needles different enlargement or reduction ratios can be achieved. This device, now largely overtaken by computer guided router systems that scan
7200-638: The parameter of first or third angle projection and displaying the relevant symbol on the technical drawing. 3D CAD allows individual parts to be assembled together to represent the final product. Buildings, aircraft, ships, and cars are modelled, assembled, and checked in 3D before technical drawings are released for manufacture. Both 2D and 3D CAD systems can be used to produce technical drawings for any discipline. The various disciplines (electrical, electronic, pneumatic, hydraulic, etc.) have industry recognized symbols to represent common components. BS and ISO produce standards to show recommended practices but it
7296-615: The period, such as the increasing adoption of locomotives, steamboats and steamships, hot blast iron smelting and new technologies, such as the electrical telegraph , were widely introduced in the 1840s and 1850s, were not powerful enough to drive high rates of growth. Rapid economic growth began to occur after 1870, springing from a new group of innovations in what has been called the Second Industrial Revolution . These innovations included new steel making processes , mass-production , assembly lines , electrical grid systems,
7392-518: The position of a common fixture across multiple positions. Templates are sold commercially by a number of vendors, usually customized to a specific task, but it is also not uncommon for a drafter to create his own templates. This basic drafting system requires an accurate table and constant attention to the positioning of the tools. A common error is to allow the triangles to push the top of the T-square down slightly, thereby throwing off all angles. Even tasks as simple as drawing two angled lines meeting at
7488-433: The positions of the arms in the linkage between the pointer arm and drawing arm, the scale of the image produced can be changed. In 1821, Professor William Wallace (1768–1843) invented the eidograph to improve upon the practical utility of the pantograph. The eidograph relocates the fixed point to the center of the parallelogram and uses a narrow parallelogram to provide improved mechanical advantages. The original use of
7584-517: The production flow and some had special carriages for rolling heavy items into machining positions. Production of the Ford Model T used 32,000 machine tools. Lean manufacturing , also known as just-in-time manufacturing, was developed in Japan in the 1930s. It is a production method aimed primarily at reducing times within the production system as well as response times from suppliers and to customers. It
7680-512: The production of technical drawings: two dimensions ("2D") and three dimensions ("3D"). 2D CAD systems such as AutoCAD or MicroStation replace the paper drawing discipline. The lines, circles, arcs, and curves are created within the software. It is down to the technical drawing skill of the user to produce the drawing. There is still much scope for error in the drawing when producing first and third angle orthographic projections , auxiliary projections and cross-section views . A 2D CAD system
7776-406: The record would be duplicated in reverse. This, in theory, could extend the usability of a pantograph master by using the unworn/lesser worn part of the recording for duplication. Pathé employed this system with mastering their vertically-cut records until 1923; a 5-inch-diameter (130 mm), 4-or-6-inch-long (100 or 150 mm) master cylinder, rotating at a high speed, would be recorded on. This
7872-606: The standards in detail is that the drawings are printed and published in a uniform style when the patent issues and the drawings must also be such that they can be readily understood by persons using the patent descriptions. Working drawings are the set of technical drawings used during the manufacturing phase of a product. In architecture, these include civil drawings , architectural drawings , structural drawings , mechanical systems drawings , electrical drawings , and plumbing drawings . Assembly drawings show how different parts go together, identify those parts by number, and have
7968-461: The subject matter". A cutaway drawing is a technical illustration, in which part of the surface of a three-dimensional model is removed in order to show some of the model's interior in relation to its exterior. The purpose of a cutaway drawing is to "allow the viewer to have a look into an otherwise solid opaque object. Instead of letting the inner object shine through the surrounding surface, parts of outside object are simply removed. This produces
8064-439: The symbols and principles of technical drawing are codified in an international standard called ISO 128 . The need for precise communication in the preparation of a functional document distinguishes technical drawing from the expressive drawing of the visual arts . Artistic drawings are subjectively interpreted; their meanings are multiply determined. Technical drawings are understood to have one intended meaning. A draftsman
8160-437: The then-well-known technique of chain or sequential production. Ford also bought or designed and built special purpose machine tools and fixtures such as multiple spindle drill presses that could drill every hole on one side of an engine block in one operation and a multiple head milling machine that could simultaneously machine 15 engine blocks held on a single fixture. All of these machine tools were arranged systematically in
8256-422: The true shape and size of the object, the projection plane must be parallel to the object surface. Therefore, any surface that is not in line with the three major axis needs its own projection plane to show the features correctly. Patterns, sometimes called developments, show the size and shape of a flat piece of material needed for later bending or folding into a three-dimensional shape. An exploded-view drawing
8352-409: The various components will fit together. A 3D CAD system (such as KeyCreator , Autodesk Inventor , or SolidWorks ) first produces the geometry of the part; the technical drawing comes from user defined views of that geometry. Any orthographic, projected or sectioned view is created by the software. There is no scope for error in the production of these views. The main scope for error comes in setting
8448-460: The wax master disc. Before the advent of control technologies such as numerical control (NC and CNC) and programmable logic control (PLC), duplicate parts being milled on a milling machine could not have their contours mapped out by moving the milling cutter in a "connect-the-dots" ("by-the-numbers") fashion. The only ways to control the movement of the cutting tool were to dial the positions by hand using dexterous skill (with natural limits on
8544-431: The world focus on such things as: In addition to general overviews, researchers have examined the features and factors affecting particular key aspects of manufacturing development. They have compared production and investment in a range of Western and non-Western countries and presented case studies of growth and performance in important individual industries and market-economic sectors. On June 26, 2009, Jeff Immelt ,
8640-434: The world uses the international standard (A4 and its siblings). North America uses its own sizes. The applicant for a patent will be required by law to furnish a drawing of the invention if or when the nature of the case requires a drawing to understand the invention with the job. This drawing must be filed with the application. This includes practically all inventions except compositions of matter or processes , but
8736-413: Was a pantograph design and sometimes referred to as "The Pantograph Punch". An early 19th-century device employing this mechanism is the polygraph , which produces a duplicate of a letter as the original is written. In 1886, Eduard Selling patented a prize-winning calculating machine based on the pantograph, although it was not commercially successful. Longarm quilting machine operators may trace
8832-498: Was done as the resulting cylinder was considerably loud and of very high fidelity. Then, the cylinder would be placed on the mandrel of a duplicating pantograph that would be played with a stylus on the end of a lever, which would transfer the sound to a wax disc master, which would be electroplated and be used to stamp copies out. This system resulted in some fidelity reduction and rumble, but relatively high quality sound. Edison Diamond Disc Records were made by recording directly onto
8928-499: Was essentially the same concept as reproducing documents with a pen-equipped pantograph, but applied to the machining of hard materials such as metal, wood, or plastic. Pantograph routing , which is conceptually identical to pantograph milling, also exists (as does CNC routing). The Blanchard lathe, a copying lathe developed by Thomas Blanchard , used the same essential concept. The development and dissemination throughout industry of NC, CNC, PLC, and other control technologies provided
9024-833: Was introduced in Australia in the 1950s by the British Motor Corporation (Australia) at its Victoria Park plant in Sydney, from where the idea later migrated to Toyota. News spread to western countries from Japan in 1977 in two English-language articles: one referred to the methodology as the "Ohno system", after Taiichi Ohno , who was instrumental in its development within Toyota. The other article, by Toyota authors in an international journal, provided additional details. Finally, those and other publicity were translated into implementations, beginning in 1980 and then quickly multiplying throughout
9120-476: Was mechanized during the mid 19th century. Mass production of sewing machines and agricultural machinery such as reapers occurred in the mid to late 19th century. The mass production of bicycles started in the 1880s. Steam-powered factories became widespread, although the conversion from water power to steam occurred in England earlier than in the U.S. Electrification of factories, which had begun gradually in
9216-483: Was now used to handle 150 dozen bottles at a time whereas previously used hand trucks could only carry 6 dozen bottles at a time. Electric mixers replaced men with shovels handling sand and other ingredients that were fed into the glass furnace. An electric overhead crane replaced 36 day laborers for moving heavy loads across the factory. Mass production was popularized in the late 1910s and 1920s by Henry Ford 's Ford Motor Company , which introduced electric motors to
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