How to Adjust the Stamping Die Gap?

Everyone in the metal stamping parts factory knows that the gap of the stamping die is very important in the process of stamping production. Whether the die gap is reasonable is directly related to the quality of the stamping parts and subsequent production and processing. The reason is that the unreasonable die gap will cause problems. It leads to many bad problems, such as large burr of stamping parts, poor quality, mold wear and so on. Therefore, manufacturers of metal stamping parts must be reasonable when designing or adjusting the gap of stamping dies. Based on its many years of production experience, HARSLE has summarized several methods for adjusting the mold gap. Let's take a look at it together!

1. Washer Method

The gasket method is to place the paper, metal plate or forming workpiece with uniform thickness and the same gap value around the edge of the female mold, then slowly close the mold, and place an equal-height cushion so that the male mold can enter the edge of the female mold, and observe the male mold. and the gap between the die. If the gap is not uniform, adjust the gap by tapping the punch fixing plate until it is uniform, then tighten the upper die fixing screw, and then put the paper into the test punching hole, and observe the blanking of the paper until the gap is uniform. Finally, after clamping the upper mold base and the fixing plate, drill and ream the dowel pin holes together, and then punch the cylindrical pins. This method is widely used in small and medium punching dies, drawing dies, bending dies, etc. It is also suitable for controlling the wall thickness of plastic molds.

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 method, so a layer of soft metal (such as copper plating) can be plated on the punch surface, and the coating thickness is equal to the punching gap value on one side , and then adjust, fix and position as above. There is no need to remove the coating after assembly, and it will fall off naturally during the cutting process.

3. Coating Method

The coating method is to apply a layer of enamel or amino acid paint on the surface of the punch. When painting, you should choose paints with different viscosities according to the size of the gap, or control the thickness by painting multiple times. After painting, the punch assembly should be baked in a 100120 oven for 0.5-1 hour until the thickness of the paint layer is equal to the blanking gap value, which should be uniform, and then adjusted, fixed and positioned according to the above method.

4. Light Transmission Method

The light transmission method is to illuminate the bottom surface with light after the upper and lower molds are closed, observe the size of the light gap around the edge of the convex and concave mold, and judge whether the blanking gap is uniform. If the gap is not uniform, adjust, fix and position. This method is suitable for thin blanking dies that require high assembly fitters. For example, it is best to use a die gap gauge for inspection and adjustment.