Several methods to adjust the gap of metal stamping parts die

The gap of the metal stamping die is related to the type and thickness of the material being stamped. Unreasonable gaps will cause many undesirable problems. For example, if the gap is too large, the burrs of the metal stamping parts are relatively large, the quality is also poor, and the gap is too small; The mold wears severely, which reduces the service life of the mold. Therefore, in the past experience, the manufacturer has found several ways to adjust the mold gap. Let’s take a look at it. First, the gasket method is to make the thickness uniform and the value equal to The paper, metal or shaped workpiece with the gap value is placed around the edge of the die, and then the die is slowly closed, the contour pad is cushioned, so that the punch enters the edge of the die, and the gap between the punch and the die is observed. situation. If the gap is not uniform, adjust the gap by hitting the punch fixing plate until it is even, then tighten the upper die fixing screw, and then put the paper sheet for test punching, and observe the punching condition of the paper sheet until the gap is adjusted to evenness. Finally, after clamping the upper mold base and the fixed plate, drill and ream locating pin holes together, and then drive the cylindrical pins. This method is widely used in small and medium blanking dies, drawing dies, bending dies, etc., as well as wall thickness control of plastic dies. 2. Copper plating method For punching dies with complex shapes and a large number of punches, it is difficult to control the gap with the above methods. At this time, the surface of the punches can be plated with a layer of soft metal (such as copper plating, etc.). The thickness of the coating is equal to the unilateral blanking gap value, and then adjust, fix, and position according to the above method. The plating layer does not need to be removed after assembly, and it will naturally fall off during punching. 3. Coating method The coating method is to coat a thin film such as enamel or amino alkyd paint on the surface of the convex mold. When painting, paint with different viscosity should be selected according to the gap size, or controlled by multiple paintings. Its thickness, after painting, put the punch assembly in an oven at 100120`C for 0.5 to 1 hour, until the thickness of the paint layer is equal to the value of the blanking gap, and make it uniform, and then adjust, fix and position according to the above method . 4. Light transmission method The light transmission method is to illuminate the upper and lower molds with light from the bottom surface to observe the size of the light gap around the edge of the convex and concave molds to determine whether the blanking gap is uniform. If the gap is not uniform, Then adjust, fix, and position. This method is suitable for thin-material blanking dies, and has higher requirements for assembly fitters. For example, it is better to use the mold gap measuring instrument to detect and adjust. Recommended article: What's wrong with the surface roughness of stamping parts? Previous post: The impact of the accuracy of the stamping parts processing equipment press on the product