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Mini car panels forming process and die design

Department Neimeng Pi parts, materials for the 0.8mm thick OgF cold rolled steel, with a column bottom Neimeng Pi spot welding, and the front window fit within a 4 board, to ensure that the window is not in use i rain. Therefore, after the required parts stamping good rigidity, smooth surface, no warping, wrinkles, cracks and other defects. The part of space by a number of changes in surface and shoulder pressure, boss, etc., asymmetrical, @ ⑧ coordinate direction of a height gap between large parts, complex undulating surfaces. Stretch forming, the sheet metal produced elongation, compression, bulging and other composite deformation, forming process of the poor in 2 parts drawing process of closing out lap 1 Date: September 19, 1997 shown in Figure 2. To facilitate the analysis, the components shown in Figure 2 is divided into I,ed hardy schuhe, Ⅱ, Ⅲ, Ⅳ area. In the I district,mulberry oslo, Ⅲ area,ed hardy shop, Ⅳ area at the corner of K, the radial flange tension in the tensile, shear compression,Mulberry tasker, and the l States l> IJ. As the role of sheet metal, a thickening of the trend, often produce flange wrinkling and die wall near the corner R crack defects. Nepalese die fillet the smaller sheet resistance of the die into the larger trend of higher crack. In the stretch in the late punch fillet around the crown thinning of the sheet, there will be cracking, curse the smaller, the greater the crack trend. Ⅲ area, Ⅳ tension flange area less resistance in the feed, with the blank holder stable product under the flange gradually reduced, the elastic deformation of sheet metal components increased, part ejection, due to the rebound. Part wall is easy to produce relaxation phenomenon, affecting parts of the dimensional accuracy. Ⅱ area is focused on the part of the deformation zone and stress concentration, shape changes dramatically. Ⅱ Zone 2 flange of a two-way tension, tension in the sheet metal thinner flange crack instability, which extends to parts of the sidewall cracking will cause parts scrapped. 11-1 District and Ⅱ-3 zone is a tension and compression stress state, and II> II, is a compression type deformation, and K at the same forming conditions. In the process design,mac makeup wholesale, I District, Ⅳ zone settings pull Chung tendons. Ⅲ, tensile set threshold, increased feed resistance, reduce the feed rate, equilibrium deformation. Ⅱ sheet to start a Zone 2 area as small as possible, making it a relatively weak deformation zone. ① ② selected stamping direction of a coordinate direction, to ensure that components do not appear in the forming press corner. Binder constituted by a flat surface. To avoid the die contacts and the beginning of the blank holder. Sheet plastic deformation, and its expansion should be less than the length of the punch to start in the stamping direction height difference between the smallest part of the stretch. Stamping parts in the automation of the production line, after the armed one to add a piece by Hitomi iliac (Die Industry) 1998. No. Total 20 921 7 between the parts requirements of the stamping process to maintain the same feeding direction, not flip. Process: a drawing of all sides blanking, punching the side of the cut, cut. Figure 2 Figure 3 Environmental Technology Square Village Design 3.1 tensile modulus with tensile modulus with real casting structure, the material is boron coral, orientation guides, easy to stretch the gap adjustment. Design, appropriate for a zone 1 increased Ⅱ, Ⅱ L3 region and K at the die fillet forbearance, punch fillet destroyed, and both matches to ensure there is sufficient tensile sheet deformation and bulging deformation. Appropriate reduction in section Ⅲ, Ⅳ curse punch fillet radius area, an increase in sheet metal forming tensile stress, to minimize rebound. 3.2 Cutting, punching cutting edge, punching die with pillar-oriented, working part of high-carbon tool steel inserts with the structure, easy to grind and replace the punch hardness of 58 ~ 621-IRC, die hardness 6064HRC. 3.3 lateral, lateral cutting die, cutting die horizontal wedge, Implantable return spring structure, safe and reliable. And designed the top feeding mechanism shown in Figure 3 can be expected anyone to care a special hopper, and the remaining waste by the waste chute slide machine, into the waste conveyor. Figure 3 feeding mechanism feeding the selection determines the direction of the mold structure. If you use the feed direction in Figure 4 A, in the lateral, cut processes, waste fell from a lateral wedge seat, lateral wedge seat for the cantilever structure, mold design and manufacturing requirements of high strength, complex structure, as shown in Figure 4D -D profile structure. If the selected feeding direction B, in the lateral, cut off the process on both sides of the waste chute in the slide out from the mold, do not wedge seat cantilever structure, improve the reliability design, mold manufacturing cost reduction, as shown in Figure 4Dl-Dl section structure, Therefore, the parts selected for the feeding direction B feed direction. Figure 4 stretch, trimming, punching, cutting complex mode structure

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