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What should be paid attention to in precision stamping?

Precision stamping parts processed by precision stamping technology have the advantages of large size range, complex shape and high precision, which are widely used in automobile, medical, aviation and other industries. The processing technology of precision stamping parts is more complex. In order to ensure the forming effect of stamping parts, we need to pay attention to the following matters when processing precision stamping parts:

1. The number of working procedures of precision stamping parts mainly depends on the complexity of its structural shape, and depends on the number of bending angles, relative position and bending direction. When the bending radius of the bending part is less than the allowable value, a shaping process is added after bending.

2. The process quantity of precision stamping parts is related to the material properties, drawing height, drawing steps, drawing diameter and material thickness, which can only be determined by drawing process calculation. When the fillet radius of deep drawing parts is small or the dimensional accuracy is high, a shaping process should be added after deep drawing.

3. The determination of the number of processes should also be in line with the enterprise's existing mold making capacity and stamping equipment. The mold making ability should be able to ensure the corresponding improvement of mold processing and assembly accuracy. Otherwise, the number of operations can only be increased.

4. When the section quality and dimensional accuracy of precision stamping parts are required to be high, it can be considered to add finishing process after blanking process or directly adopt precision blanking process.

5. In order to improve the stability of precision stamping process, it is sometimes necessary to increase the number of processes to ensure the quality of precision stamping parts. For example, additional positioning hole punching of bending parts, increasing deformation reducing hole punching in forming process to transfer deformation area, etc.

6. The precision stamping parts with simple shape are finished by single process die. Due to the limitation of the structure or strength of the die, the inner and outer contour of the workpiece with complex blanking shape should be divided into several parts, and multiple stamping processes should be adopted.

7. Special stamping oil should be selected for precision stamping. Rapeseed oil, machine oil, recycled oil and other non special oil products do not contain additives suitable for stamping, which will cause quality problems such as precision reduction of workpiece, burr of hairy edge, surface hole damage, etc. Moreover, the chemical substances in non special oil products will cause rust, yellow robe and skin allergy of workers.


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