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Dry sharing: metal stamping parts appear crack reason and prevention method

by:Fortuna     2021-01-31
As the technician author of metal stamping parts manufacturers, for metal stamping parts can say very understand, know the process also many, today to share give beginners metal stamping friends some dry: a, metal stamping parts appear crack reason: 1, the local tensile stress is too large, due to the large local tensile stress in the process of machining, metal stamping parts affected by the internal stress and external shocks, the result of the local big bulging deformation and cracking. 2, execution does not reach the designated position: forming process parameters in the process of stamping forming, technological requirements the material core die, pressure and both parts must fit closely together, in the machine tool slide block slide compression sheet metal forming, plastic deformation and realize processing technical personnel not according to process requirements specified in this one phase in a timely manner to adjust machine pressure, work is not stable, caused by stamping craze. 3, flanging forming mould design flaws: mould for a double cavity left/right public, due to this process content in addition to the flanging, also have both shape forming content, combined with the special complex parts, curved surface is narrow, the forming requirements concave die core material consistent with the forming surface and so on, cause mould structure conditions for forming large travel, pressure area is small, appear cracking phenomenon. 2, metal stamping parts to prevent cracking methods: 1, metal stamping parts, deep drawing process, drawing direction as far as possible to make the surface contact between the punch and the blank, the reasonable material surface shape and blank-holder force so that each part of the material surface resistance even moderately, to reduce the drawing depth, open hole and process, etc. 2, the structure design of metal stamping parts: in the design, the best radius is larger, surface shape in the direction of the deep drawing actual some shallow depth, everywhere and even some depth, shape changes as simple as possible and as far as possible some gentle etc. 3, metal stamping die design: can take drawbead design reasonable, using a larger die fillet, make reasonable measures such as punch and die clearance. Metal stamping parts in the process of machining, there will be many faults such as craze, these needs reasonable design, the careful operation, can prevent to reduce hardware stamping adverse phenomenon, improve the quality of the product. 【 Relevant recommendation 】 Details: how much do you know the new energy automotive stamping parts? Details: sharing details of stamping processing industry: precision metal stamping parts figure how to draw, please be aware that this several steps
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