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4Question

What are the causes of scratches on metal stampings


  Since many metal stamping parts factories are owned by the main equipment factories, the stamping parts market is very imperfect and sound. However, the small stamping parts market is very mature in some areas in the south. From today's situation, China's metal stamping parts market has the following problems:
  Some production capacity exceeds demand, some of the metal stamping factory in the main plant, can not put, can not hold. Most of the year, production tasks are insufficient and there is no market behavior.
  The market for household electrical appliances and electrical stamping parts is fiercely competitive. However, there are not many companies that have become internationally competitive in the climate.
  1, metal stamping parts have scratches. The main causes of scratches on parts are: sharp marks on the mold or metal dust falling into the mold. Preventive measures are to grind the marks on the mold and remove metal dust.
  2. The bottom of the part is cracked. The main reasons for the cracking of the bottom of the part are: poor plasticity of the part or over-tightening of the blank holder. Preventive measures are to replace better plastic materials or to relax the blank holder.
  3, parts of the sidewall wrinkles. The main reasons for the occurrence of wrinkles on the side wall of a part are: the thickness of the material is not enough (thickness is smaller than the minimum allowable thickness) or the eccentricity occurs when the upper and lower molds are installed, resulting in large gaps on one side and small gaps on the other side. Preventive measures for the immediate replacement of materials and re-adjust the mold.
  4, the height of the parts is not enough. The reason for the lack of height of the parts and their prevention measures are as follows:
  1. The size of the metal stampings is insufficient. At this point should increase the size of wool.
  2. Mold clearance is too large. At this point, you should trim the mold.
  3. Metal stamping parts material is not good plasticity. At this time, annealing or exchange of plastic materials should be performed.