The three-dimensional substance that is based on AutoCAD builds a model to discuss

Combinative example from UCS coordinate layer of department, solid, much viewport, substance edits to make 2 dimension figure the field such as three-dimensional substance, built a model to undertake study to discuss to three-dimensional substance, aim to raise three-dimensional substance to build modular efficiency. As the flying development of computer technology, three-dimensional CAD software is mature with each passing day, three-dimensional and hypostatic modelling begins to apply extensively at product or engineering design. Current, the commonly used three-dimensional software that build a model basically has ／ of AutoCAD, Pro Engineer, UG, Solidwork, CAXA. Although AutoCAD of photograph of the in a few kinds of afore-mentioned software three-dimensional function that build a model is right weaker, complex to appearance body hard compose is built, and inconvenience is revised, but to having the teacher of foundation of AutoCAD2 dimension plot or technical personnel, learn easily simply, master easily, start is quick. The author combines AutoCAD three-dimensional substance to establish education practice of the model below, talk about a few experience. 1 three-dimensional and hypostatic model summarizes three-dimensional model to include model of line draw a frame round, surface model and hypostatic model. Among them the complete information of vinculum of hypostatic model bag, face, body, a kind be the superlative degree in 3 kinds of models. It has the physical property such as quality, bulk not only, be close to body of Yu Zhen objective more, and can undertake between entity and, hand in, the Boer operation such as difference, build more complex hypostatic model, can have pass the time in a leisurely way concealed, chromatic with apply colours to a drawing. In addition, hypostatic model still can create view of 2 dimension plane, cutaway view and section, the CNC Machining that the hypostatic model data that outputs through AutoCAD still can offer sequel and finite yuan of analysis. The three-dimensional substance of 2 AutoCAD builds a model 2.

When the 1 train of thought that build a model and method establish three-dimensional and hypostatic model, undertake an analysis to the structure of the model above all, no matter how the structure of the model is complex, it always is by a certain number of simple substance is formed. Accordingly, of complex model establishing a procedure is the process that found simple substance ceaselessly and sets its actually. Of course, the program that builds complex model may have several kinds, should choose a kind of more convenient, sound plan to undertake building a model. Use basic system next or classics of 2 dimension graph drawing or metempsychosis coming back becomes each simple entity. Will undertake between each simple substance finally and, poor, hand in etc Boer operation and all sorts of editor operations obtain more complex substance. 2.

The 2 skill that build a model 2.

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1 society is built and manage user coordinate to be fastened in AutoCAD, coordinate department cent is fastened for world coordinate (WCS) and user coordinate are (Ucs) two kinds. The coordinate department that uses in 2 dimension plot is world coordinate department mostly, it is exclusive and changeless. But in three-dimensional plot process, watch a figure to facilitate scale is mixed, outside dividing WCS, the user can build his coordinate department according to need- - user coordinate is fastened (Ucs) , it is OK that such coordinate ties way of axis of its origin position and X, Y, Z random moves and rotate, a certain specific target in can relying on a graph even and change. The society builds user coordinate department to will simplify the three-dimensional process that build a model, it is three-dimensional the linchpin that builds a model. If the graph shows three-dimensional and hypostatic model 1 times, the world coordinate in the plan is being adopted when scale cylinder A is fastened (Wcs) , and when scale cylinder B, current coordinate department should circle Ru Zhouxuan to turn 900, when scale cylinder C, current coordinate department should circle Y axis to rotate 90. , when scale cylinder D, should designate an area or built UCS at 3 o'clock. Additional, the three-dimensional graph with complex scale, the UCS number that builds as a result of need is more, fasten commutation to avoid to undertake coordinate often, the user can manage through UCS implement the UCS predefine of will different way and had saved, call at any time when need. 2.

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Layer of graph of layer of graph of 2 manage setting (Layer) is AutoCAD one of tools with most effective object of constituent government figure. It is through setting not congenial target on different layer, can show through controlling the character of the layer to come conveniently and edit an object. Three-dimensional graph relatively 2 dimension graph is more complex, visual interference is bigger, accordingly more should layer of graph of have the aid of will manage a figure. Of three-dimensional and hypostatic model statified can analyse a way according to body, set each hypostatic targets that constitute this model on different layer, try to distinguish with different color, so that clearer ground is constructive, for follow-up chromatic processing and material qualitative allocation is brought convenient. When producing interference, can make a few substance sightless through shut or freezing certain graph layer, so that the fixed position of other and hypostatic object or choice. Additional, when layer of graph of have the aid of manages three-dimensional figure, do not be eager to pursueing to differring commonly the hypostatic object between the layer becomes Boer operation, unless already finished the scale of whole and three-dimensional graph, go against the editor job from the back otherwise. 2.

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When the three-dimensional graph with the applied complex scale of 3 much viewport, can undertake directly in a three-dimensional view, but often can appear expressive inconvenience and efficiency are low problem. These problems, through building much viewport to be able to be solved. AutoCAD allows to differentiate plot area for many windows (viewport) , allow to use different UCS in different viewport. Accordingly, when the three-dimensional graph with scale and complex observation, differentiate plot area for many viewport, be built according to need in every viewport or use different UCS, the observation with different setting is nodded or the choice shows different view to wait, if pursue,three-dimensional figure showed respectively in 4 viewport of 2 advocate view, vertical view, different view and wait for an axis to survey a plan, can mix in the scale in different viewport already so the different part that watchs a figure, the changeover that reduced UCS coordinate department and view greatly works, and it is no matter in that viewport plot or revise, final result also will show at the same time in other viewport. When there is interference between the simple entity that forms three-dimensional entity, what also can differ in the scale in different viewport is simple and hypostatic. If pursue 2 in scale muscle board when, the plan is surveyed in the axis in first scale a muscle board, again switch arrives in vertical view, the methodological scale that uses a mirror the 2nd muscle board. This shows, these view union rises scale graph, can simplify plot process. The method of graph of this kind of scale also is the method that makes 3 view embryonic form by three-dimensional substance. 2.

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Editor of the side that 4 adroitness handle substance, edge, body commands three-dimensional graph besides the shift in can using 2 dimension figure, duplicate, delete, outside pouring the editor such as horn, round horn to operate, still can be opposite hypostatic face, edge, body has an edition, for example can drawing, mobile, deflection, duplicate, rotate, tilt hypostatic surface, also can duplicate hypostatic arris edge, still can have Boer operation to entity, undertake analyse is cut, cut, take the operation such as housing, these functions make an user OK very revise existing substance conveniently in order to form new feature. Agile ground applies entity to edit a function to will improve the efficiency that build a model greatly. Exemple: If pursue,the three-dimensional substance of 2 builds a model in, the cylinder of book 33ram has scale of two kinds of methods: It is the center that is cylinder underside with the centre of a circle with U form rear substance, scale height is the cylinder of 38ram; 2 it is the center that is cylinder underside with the centre of a circle of front of U form substance, scale height is- - the cylinder of 30mm, execute the editor operation of " of " mobile plaque or " of " drawing face next, face of pitch on front, shift of direction of axis of its edge Z or drawing 8mm. 2.

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5 apply neatly drawing and rotate the command makes 2 dimension figure three-dimensional substance be in AutoCAD, any complex substance can be regarded commonly by a certain number of simple substance is formed through the means such as overlay, cut. To regular simple substance, can use the basic system such as body of cuboid, sphere, cylinder, cone, wedge, pass and, hand in, the Boer operation such as difference is generated. Graph 3(a) place shows the simple substance that after undertaking needing operation for two cuboid, gets, graph 3(b) place shows the simple substance that undertake for cuboid and cylinder and undertakes needing operation getting with another cylinder again after operation, graph 3(c) place shows the simple substance that after undertaking making operation for two cylinder, undertakes needing operation getting with another cylinder again. To irregular simple substance, above all switch arrives corresponding view is planar, scale gives its planar figure, after comprising face region, along its ichnography form perpendicular direction presses appointed height or method drawing can be generated, if pursue,4 are shown. To sincere or hollow swing tower, but first what scale gives swing tower is sectional, after comprising face region, it is certain to circling its circling its rotor to rotate angle can be generated, if pursue,5 are shown. Axle sleeve kind spare parts, disc kind the spare parts can use this method scale, far command of more columnar than calling a picture for many times, conic, sphere, boer operation generates reoccupy hypostatic and simple. 3 epilogue as AutoCAD product upgrade ceaselessly update, wei Jianmo function will be thirdly more and more powerful. Want to apply AutoCAD adroitly to build three-dimensional model, improve the efficiency that build a model, besides the method that uses article introduction integratedly and skill, still must dig the three-dimensional function building a model with new AutoCAD hard. CNC Milling