Main Basic Processes Of Precision Machining

  • 1. Blanking and punching Blanking and punching are the processes to separate the blank. The blanking and punching process is the same, only the use is different. When blanking, the separated part is the product, and the remaining periphery is scrap; punching is to obtain the hole, the punched sheet is the product, and the separated part is scrap. Blanking and punching are collectively called punching. Both the punch and the die of the punching die have sharp edges, and there is a gap of 5% -10% of the thickness of the plate between the punch and the die, to ensure regular cutting and less burrs.
  • 2. Drawing: Drawing is the process of making flat blanks into cup-shaped or box-shaped pieces. The edges of the punch and die of the drawing die should be rounded to prevent the workpiece from being cracked. The gap between the punch and the die should be slightly larger than the thickness of the sheet (generally 1.1-1.2 times the thickness of the sheet) in order to reduce friction. In order to prevent wrinkling, the blank margin needs to be pressed with a pressure plate (blank ring), and the shortcomings of the product during the deep drawing process will be cracked. Please stamp the kanban material to use a die to separate or deform the sheet material. Because the sheet material does not need to be heated in most cases, it is also called cold stamping, or cold stamping or stamping for short.
  • 3. Zigzag Zigzag is to make the workpiece to obtain a variety of bending angles. The working part of the zigzag die that makes the workpiece zigzag should have an appropriate corner radius r to prevent the workpiece from cracking when zigzag.
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