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February 10, 2021

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How to Make a Sheet Metal Stamping Die

There are many types of tooling, including single die, compound die and progressive die. To determine tooling form, it must be based on the requirements of the stamping parts, production batch quantity, and tooling fabrication condition.

What is Metal Stamping Die?

Stamping die is a special process equipment for processing materials (metal or non-metal) into parts (or semi-finished products) in cold stamping processing, called cold stamping die. Stamping is a pressure processing method that installed tooling on press to apply pressure to raw material at room temperature to cause separation or plastic deformation to obtain the required parts.

How to Make a Sheet Metal Stamping Die?

Step1: Sample measurement / component drawing

Analysis customer drawing if no drawing, need to measure sample; then find out the difficulty, factors that will affect product dimension, stability forming difficulty, insert’s fragility, appearance damage etc. Finally confirm tooling fabrication class.

Step2: Tooling design review

Stamping die designing demands: precision dimension, smooth surface, reasonable structure, high production efficiency, easy to automate; easy production, high life, low cost, process guidance and economical.

Once received customer’s drawing or samples, project engineer will conduct tooling development notice to R&D, QC and other relevant depts. to start tooling design formally. Engineering team will have designing meeting to review product dimension, structure and production craft. If any unclear points contact customer at the first time and backup the meeting result.

Step3: Customer approval

Step4: Tooling design

The in-charge engineer will be nominated by engineer manager to do stamping process drawing, need to take different component designing function, tooling precision, lifetime and customer requirements into consideration, to confirm strip layout design, once confirmed by manager then provide to customer approve.

Step5: Drawing approve

Once drawing confirmed, engineer will overview the whole tooling design, in case this any issue. Provide final tooling drawing which confirmed by manager then send to customer approval. Upon customer confirmation, organize the CAD drawing.

Step6: Tooling fabrication

Make the whole tooling design, organize die plates and inserts, and then arrange for fabrication. General process as below:
  • Prepare raw material
  • CNC
  • Rough grinding
  • Vacuum heat treatment
  • Rough cut
  • Ultracryogenic treatment
  • JG, wire cutting
  • Step7: Die plate & insert inspection

    QC will inspect finished inserts & die plates, once qualified, then send for tooling assembly.

    Step8: Tooling assembly

    Assembly the tooling per tooling drawing, pay attention to inserts / die plates precision.

    Step9: Die trails

    Install tooling into press machine, then do stamping and inspect sample dimensions, if dimension out of spec. then adjust the tooling accordingly until get all the dimensions in spec.

    Step10: Sampling

    Send the qualified sample to customer for approval & release for mass production.