SKD61 clinker

Rough machining

Turning/milling forming: Process the blank to near the final size, leaving a precision machining allowance of 0.2-0.5mm

Drilling guide column holes: The accuracy of positioning holes should be controlled within ± 0.02mm

Heat treatment

Quenching+tempering: to achieve a hardness standard of 92HRA (hard alloy) or 58-62HRC (tool steel) for the material

Cryogenic treatment (optional): enhances the dimensional stability of materials such as SKD11

Precision machining

Precision grinding: Use a CNC grinder to machine the cutting edge, with a surface roughness of ≤ Ra0.8 μ m58

Wire cutting: Processing complex irregular contours with an accuracy of ± 0.005mm ³

3、 Post processing and inspection

Surface strengthening

TD treatment or PVD coating: enhances the anti adhesive wear ability of the punch material

Polishing: Mirror treatment on the cutting edge to reduce punching burrs

Quality verification

Dimensional inspection: Use a coordinate measuring instrument to verify key dimensions 68

Trial punching test: Perform 50-100 punches on the matching mold and observe the wear of the cutting edge

4、 Packaging and storage

Rust proof oil packaging, hard alloy punch needs to be separately shockproof packaged

Label material, hardness, and applicable stamping thickness range 6

The entire process requires special attention to the clearance between the punch material and the mold (usually 5-8% of the material thickness), and the processing environment should be kept at a constant temperature and humidity to avoid dimensional deformation.