1. Determine the installation height and position of the wedge through the cross section 1) The position of the punch is roughly determined, and the angle and position of the die sleeve and the anti-rotation angle are accurately determined. According to the size of the punch holder, the size of the working surface of the wedge slider is determined (determine the model of the wedge); 2) The wedge is placed according to the placement angle on the die holder and the position of the punch holder
2. Select the installation method of the punch holder according to the actual situation of the mold From the perspective of the force balance of the wedge slider, the most ideal fixing method is to control the force point of the punch as much as possible on the center of the wedge slider. In special cases, the installation method of the holder is arranged according to the actual situation; according to the fixing angle of the punch holder, the approximate plane position of the wedge on the die holder is determined; 3. According to the fixed position and cross-sectional diagram of the wedge slider and the punch holder, determine the installation height and plane position of the wedge, and try to ensure that the installation height and plane coordinate size of the wedge are integers (ending with 0, 5). 4. When designing a standard cam die, since the stroke of the cam is fixed, the following items should be considered: Ordinary inclined cam: Since the working part is fixed on the lower die, it is necessary to consider whether the workpiece can be smoothly delivered and taken; its stroke must be guaranteed to be no less than the width of the flange edge + the distance of the flange cam trimming or punching, flanging + 20~30mm (Note: if it is automated stamping, it is 30mm, and it should be 50mm for manual operation) Lifting cam slider stroke: The distance from the flange to the cam trimming, punching or flanging + 20mm; the lifting cam needs to consider whether the working components (punch, side trimming knife block, flanging knife block) installed on the slider affect the assembly and disassembly of the press core; and whether there is enough space for grinding between the cam and the press core;
5. Waste treatment 1. The waste hole should be as large as possible; 2. Sometimes, in order to prevent waste clogging, the waste of the side punching hole needs to add a top material device; 3. When designing the waste slide hole on the casting, the maximum width of the waste after rotation should be fully considered; 4. If the waste is too long, you can consider adding a waste knife to make the waste slide out smoothly and improve the strength of the mold; 5. Use elastic ejector pin convex (concave) mold in the following cases: 5.1. In order to make the waste slide down piece by piece; 5.2 Want to control the state of the waste when it falls; 6. If the waste rebounds: 6.1. The knife edge should have a large mold entry amount; 6.2. A waste ejector device needs to be installed; 7. A waste guide device needs to be added in the following cases: 7.1. There is no space on the waste discharge side, and it must be converted into a right-angle direction to fall vertically. The minimum vertical hole diameter is twice the punching diameter; 7.2. If punching holes on both sides at the same time, it is necessary to add a dividing pin;
Sixth, classification of the presser of the standard wedge die: The presser prevents the positioning and deformation of the workpiece. It can be divided into three types according to its shape, number of movement directions, etc.: 1.1 Upper presser core Its advantages are: the pressing force is relatively large, and there is no need to worry about the deformation of the parts; close to the vertical wall and close to the side wall end face, use the upper presser core to separate; 1.2 Side presser core of the wedge 1.3 Shared by side presser and positive presser The pressing force of the side presser is insufficient; Parts are unstable; Positive presser should press the workpiece 10mm earlier than the side presser; Seventh, positioning and lateral force prevention of the wedge There are two types of wedges: pin positioning and key positioning; When trimming and flanging on one side, and the material is relatively thick, measures to prevent lateral force are required; measures and forms to prevent lateral force: adding guiding devices; the guiding requirements of the inclined wedge die are relatively high, especially for side punching and side trimming, because the gaps of trimming and punching are very small, so such molds are generally guided by guide pins and box heels; the pressing core is generally guided by a guide plate, and if there are special requirements, guide pins can be added for guidance (designed according to customer specific requirements); a conical locator can also be designed between the pressing core and the lower die to improve the guiding accuracy of the press; the stroke of the press must be greater than the length of the punch entering the press, otherwise the punch will break
