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14.1 spring cover

14.1 spring cover

  • Classification:14.1 spring cover
  • Number of visits:second
  • Date of issue:2020-04-22
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The design criterion of die casting wall thickness: thin wall die casting has higher strength  better compactness than thick wall die casting. In view of this, the principle of die casting design should be followed: on the premise of ensuring that the casting has enough strength  rigidity, the wall thickness should be reduced as much as possible  the uniformity of wall thickness should be maintained. It has been proved that 2.5-4mm is suitable for the design of wall thickness of die-casting parts,  the parts with wall thickness more than 6mm should  be produced by die-casting process. The effects of too thick  too thin wall on the quality of castings: if the wall is too thin in the design, the metal fusion will be bad, which will directly affect the strength of castings,  at the same time, it will cause difficulties in forming; On the other hand, with the increase of wall thickness, the defects such as porosity  shrinkage porosity in the casting will increase, which will also reduce the strength of the casting  affect the quality of the casting.

Code for design of machining allowance of die casting: generally, due to the limitations of die casting process, when some dimensional accuracy, surface roughness  geometrical tolerance of die casting parts fail to meet the requirements of product drawings, the enterprise should first consider adopting the methods of finishing such as correction, drawing, extrusion  shaping to repair,  when these problems can  be completely solved by finishing It is necessary to machine some parts of the die casting. It should be noted that a small machining allowance should be considered when machining. At the same time, the surface that is  affected by the parting surface  the movable forming should be taken as the reference surface of the blank as far as possible to avoid affecting the machining accuracy.

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