A progressive stamping supplier audit should check tooling stability, die clearance, material springback, burr direction, plating or coating risk, first-article inspection, and batch repeatability. Buyers should confirm these points before opening tooling because stamping problems become more expensive after the die is built.
Custom stamping parts depend heavily on tooling design and process control. If burr limits, bend direction, hole positions, plating thickness, and inspection points are unclear before tooling, the supplier may produce a sample that looks close but fails during assembly or mass production.
| Defect or risk | Likely cause | Prevention method | Buyer audit question |
|---|---|---|---|
| Excessive burr | Tool wear or poor clearance | Define burr limit and tool maintenance | What burr standard will be used? |
| Dimensional drift | Springback or unstable forming | Review material and forming sequence | Which dimensions are critical? |
| Plating drift | Coating thickness variation | Confirm finish standard before production | How will plating thickness be controlled? |
| Cracking | Material or bend radius issue | Review bend radius and material condition | Has forming risk been reviewed? |
| Assembly mismatch | Datum or tolerance stack-up issue | Define functional dimensions | Which features control assembly fit? |
Zhengna Technology manufactures custom stamping parts with tooling review, progressive stamping, surface treatment coordination, and inspection support. For new tooling or stamping projects, typical planning lead time is about 30 days depending on part complexity, approval requirements, and tooling design.
Before tooling starts. Tooling changes are more expensive after the die is built.
Send drawings, material, thickness, tolerance, quantity, surface treatment, and application requirements.
Burr direction can affect assembly, safety, electrical contact, surface treatment, and product reliability.
Yes. Buyers can send drawings for manufacturability and tooling-risk review.
Buyers can send drawings for review before quotation.
For progressive stamping programs, buyers should review tooling design, first-article inspection, plating or coating validation, and the in-process inspection rhythm before mass production starts. New tooling projects often need about 30 days depending on complexity, approval steps, and surface treatment requirements.
For a broader sourcing framework, see Zhengna Technology's OEM precision parts supplier audit guide, which connects CNC machining, stamping, springs, sheet metal, injection molding, inspection evidence, RFQ preparation, and production approval risks.
Plating specification follow-up: use the stamped components plating specification and inspection RFQ guide to define coating zones, masking, after-plating dimensions, hydrogen-risk controls, inspection evidence, and external-finisher lot responsibility.
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