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Stretching pieces principle

Author:admin Published:2015-03-25 19:35:06
  1, metal deep drawing (Deep Drawing)
  
  Deep drawing is stamping, pull rings or metal mold process to plate metal material is deformed into the shape of a cylinder or a box of parts. Deep in the double-action pull is usually blank holder press carried a blank holder can effectively prevent wrinkling raised edge when pulled into the steel.
  
  Drawing technology in the production process is widely used, drawing used in many industries. For example, you can use the production of car parts in the automotive industry; also be used to make household products, such as stainless steel kitchen sink.
  
  2, the drawing process
  
  Drawing process is extremely complex skill, practice, should consider the following important factors.
  
  3, the choice of materials
  
  Different tensile properties of different materials. Stretch rate limit, i.e., the ratio of blank diameter to punch diameter. Stainless steel control at 2.1 to 2.2 and 2.15 to 2.5 carbon control. Stainless steel deep drawing the second time after deep drawing, but with different carbon steel, stainless steel is not usually the same degree of tension and a second, unless heat treated. Stainless steel equipment requirements is 1-2 times the power of carbon steel equipment. Generally deep drawing with double acting hydraulic equipment is best.
  
  4, selection of the oil
  
  Lubricant selection should consider two factors should provide the film to prevent scratches and reduce friction. And after the deep drawing operation is completed, should be able to easily and completely removed. May include chloride or sulfide grease or wax, heavy lotion, soap or deep drawing.