Try to choose the right size for length plates, from steel mills, after the completion of shear needn't to secondary shear, reduce cost of shear; For rolled plate, as far as possible choose titanium machining parts uncoiling forming coil specification and process, to reduce the workload of the secondary shear, improve work efficiency. The thickness of the plate there is a deviation request, usually within the scope of the deviation permit, should first choose the deviation of the plank. Determine the shape and size of metal stamping parts, is analyzing stamping parts deformation degree, design process and the premise of the formulation procedure.
If sheet shape, not only the phenomenon of deformation along the uneven distribution of sheet metal can be obviously improved, but also can improve the forming limit, and can reduce the ear height, reduce trimming allowance. In addition, for some directly after blanking forming parts, if you can give a precise sheet shape and size, can decrease The Times of test of the variable to shorten the production cycle, improve the productivity.
In product design when selec material, avoid to choose high grade of material caused by excess product performance, at the same time, on the premise of meet the requirements of deep draw stamping product, process, try to choose existing models used in the mass production material, material thickness, forming material platform, provide convenience for the subsequent procurement, inventory management.
1, the gap is not appropriate.
Precision stamping of large clearance is also one of the cause of waste separation is not completely, or make a big burr. Blanking size depends on the die size, clearance on the punch; Punching size depends on the punch size, clearance on the die. If blade die crack or damage, generally for repair welding, and then use CNC to die processing, as a single benchmark, bedding-in punch.
2, precision stamping height.
The general problem in the debugging stage, due to the mould state is not stable, need to debug for many times. Mass production, the pressure setting parameter. Generally easy to appear in the corner.
3, waste knife height is insufficient, low waste knife.
Blade height is insufficient, precision stamping metal stamping parts process of waste scrap cutter is too low, can lead to trimming blade poor contact in up and down, separation is not complete, can repair welding waste or increase waste cutter installation seat height.
Stamping mould the rounded edge is too large, lead to rebound stamping production waste.
Stamping material into the mold, the uneven or improper material size pick-up issues
Stamping die clearance is not reasonable, leading to rebound stamping production waste
Stamping die spring use for a long time lead to fatigue damage, caused by material problem
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