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How to prevent the trimming iron filings from the auto stamping die from falling off?

When trimming the mold of automobile stamping parts, there is often a headache, that is, the phenomenon of iron filings. This is especially true around the perimeter of the die scrap knife. And this will have a great negative impact on the quality and appearance of stamping products, so we need to deal with it in time.

First of all, you need to figure out what the specific reason is. The main problems include the following: 1. The trimming edge is not vertical; 2. The stamping part does not match the mold surface; 3. The secondary shearing of the vertical edge trimming; 4. The edge clearance exceeds the standard Range; 5. The edge finish is not ideal; 6. The scrap knife is cut twice; 7. The hardness of the cutting edge is not enough; 8. The depth of the cutting edge is too deep.

So, how to solve this problem? For the reasons listed above, the main methods suggested by automobile stamping parts manufacturers are: 1. If iron filings are generated in the scrap knife, then this is mainly caused by poor tooling of stamping parts, so it is possible to take the following measures: The measure is to change the shape of the first 10 mm of the edge of the upper die trimming waste, replace it with the shape of the breakthrough edge, and at the same time, mill the waste edge of the lower die.

If it is due to the inconsistency of the shape of the template used and the stamping part, or the unreasonable edge clearance, the measures that should be taken are: use the drawing plate buckle to repair the surfaces of the edge mold, and adjust the upper and lower edges appropriately. The gap of the mouth is adjusted, and the depth of eating.

Then in the process of vertical edge trimming, in order to ensure the service life of the stamping die as much as possible, we need to ensure that the fillet of the upper edge of the trimming is 3 mm larger than the fillet of the trimmed part, and the edge of the upper die is trimmed. The vertical edge of the mouth and the vertical edge of the trimming piece should maintain an included angle of 10°.

Automotive Sheet Metal Fabrication

Pintejin Sheet Metal shop offers a cost-effective solution for a wide range of industries with our custom metal stamping and custom sheet metal fabrication capabilities. Our stampnig operations include a variety of sheet-metal forming manufacturing processes, such as punching, blanking, embossing, bending, flanging, and coining. Our professional, experienced and well-trained engineers can execute the complex metal stamping operations with precision and accuracy.

No matter what your metal fabrication needs are, Pintejin can offer the right solution: from single sheet metal part or sub-assembly of stamped metal parts to turnkey solutions for mechanical and electrical assemblies. We have the technology, equipment and the experience to fabricate customised metal products from aluminium sheet metal fabrication, steel, zinc plated steel, stainless steel sheet metal fabrication, brass and copper. Designs that require CNC machining of surfaces or components can be accommodated. We can supply polished, galvanized, zinc coated or powder coated finishes for any sheet metal work or stamped metal components. Coupled with our accurate and reliable metal fabricating equipment, we guarantee precision and repeatability in custom sheet metal work. You’ll be taking advantage of the best sheet metal fabrication china can produce.


With Pintejin automated and highly streamlined sheet metal fabrication service, you can expect a sheet metal fabrication quote within 12 hours and lead times as quickly as three days.Our rapid prototyping offering also includes a solid and reliable manufacturing capability (led by our expert team with 15+ years of experience) and technical and quality assurance, including SGS and RoHS material certifications, in-process quality reports, and First Article Inspection.



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