mbt shoes sale Use of parametric CAD technology to

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Use of parametric CAD technology to achieve rapid product development and multi-species

Re-mapping test graphics input is wrong. 3 the use of parametric technology for product development of light steel keel Figure l and Figure 2 is the use of AutoLISP AutoCADR14 environment in the development of light steel keel roller assembly and parametric design of parts drawing real side of the argument of the program loaded, Figure 1 In the command line (command: prompt) and enter the program are as follows: Enter the effective work roll axis width (maximum width of roll): 300 enter the diameter of roll film D: 120 roll film in the input diameter D: 168 input strip thickness of 1 .5 input shaping centerline (offset with Device Center): 0 Enter the next piece in the roll width: 33.53 Enter the left cone roll film width: 3497 Enter the diameter of the left cone roll film D: 19817 Enter the width of the right cone roll film 1. Figure 1 roll Tuo Figure 2 mounted input procedures: Enter the width of roller cone section B: .84 Wang Yadong use of parametric CAD technology to achieve rapid product development and multi-species input shaft chamfering 53: 2 Enter the right view point: Figure 2 roller cylindrical roller parts input part of the width Bm: 10 left roll input (/ b) outside diameter D: 120.5 input roll right (large) diameter D: 197.87 Input left view point: input shaft hole diameter d: 50 Enter width of 6:14 enter the keyway keyway depth l: 4_3 output image shown in Figure 2. 4,[link widoczny dla zalogowanych], the significance of design parameters related data show: More than 70% of manufacturing the design work is In the original design basis, and only 30% of the following is a barrier flesh of the design parameters of the design particularly suitable for table structure is fixed,[link widoczny dla zalogowanych], structure size change of standard parts, used parts and products graphic design. For example, in the mold design, There are many parts of the basic structure is the same, but slightly different shape and size. by a specification of these components, serialized sorting and classification parameters are input into the design system, designers input on the screen as long as the corresponding parameters, the computer can automatically design, while generating parts and assembly drawings. general business take full advantage of the leading products as long as the parametric system, can achieve faster and more varieties of design. (Continued from page 47) hit c A Lu, = _id an d, ≤ [d] where: P - Au touch the inner surface of the radial stress; d - Die radius ratio,. =; r】 r, - the outer die radius; r'- inner radius of the die; - yield strength of material. Here used in touch with r2 = 60n dish, rI = 15mm, n = 2, rI = 4, = 1.133p, = a lp, d a d = 2.133p = 836MPa> [d]. Therefore, select the group of units 2 floors prestressed hollow feeling, the outer ring using 40Cr material, inner ring with W6MaSCr4V2 material, the strength of the die than the overall increase of 1.5 times. 4. 2, correctly handle the mold shape. to avoid the generation of dead-metal parts itself, because the requirements of people who die extrusion concave touch angle of 90 ~, a medium touched the corner, in the A Division are bound to be dead metal, see Figure 5. dead metal appears to be squeezed in part on the surface, there is no profit from the material inside the membrane of the table} l} bare metal, which can easily damage the mold. Therefore, when the design touch cold extrusion concave, A place to consider with the arc, to eliminate the dead zone metal. 4.3 to consider the appropriate way to set size of ring forming 5 people die extrusion die extrusion die orientation angle ling size dimensions should be considered high enough to ensure that all rough without extrusion shaping it into the way of touching a closed cavity are squeezed, and the six-party disk size of the tolerance range of the best units suitable for processing into beneficial part of the launch of the taper. 5 Conclusion Based on experience, the law Lan nut processing technology: If the product volume is small, part dimensions and surface quality of less demanding, the choice of hot pressing process, on the contrary,[link widoczny dla zalogowanych], beta 4 should be considered by the cold extrusion process. ling advantages of extrusion: Part dimensional accuracy, surface quality, cold heading the six-party after the edges and corners clear,[link widoczny dla zalogowanych], beautiful,[link widoczny dla zalogowanych], s hard to guarantee the size and other dimensions; die life and high, with 2 layers prestressed cold extrusion die million pieces of continuous production of qualified products; production of high efficiency, Part Manufacturing short cycle. I plant a cold extrusion process has produced hundreds of thousands of different regulations brace items to obtain a better economic efficiency. [References [】 j Hunan Branch of Mechanical Engineering, forging units. stamping process [M 】 .1977. [21 WU Shi condolences. temperature extrusion technology [M】 _ Beijing: PCT defense industry Press, 1979.

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