In Programming and Design Phase

  • Perforated design should be approved by the customer before manufacturing. By doing this all errors can be eliminated and communication becomes much clearer. If any doubts arise, please seek advice from the customer.
  • Make sure all hole types and dimensions are in the range of your tool library. If the selections of tool punching shapes are not in your tool library list, give advice on the substitute tool shapes to the customer.
  • Make sure the selection of material type and thickness is within machine capacity and that it has all dies with their proper clearance to make the manufacturing process run without errors. Do not try to attempt punching material which is outside the machine’s capacity. Thus, do not try to punch 5.0 mm thick stainless steel while the machine capacity is only allows you to punch up to 4.0 mm stainless steel. The general rule is to use material as thin as possible to make for easier manufacturing
  • Check the exact material size dimension before doing the programming. Often the definition of 1200mm x 2400mm sheet size is not always its true size; some material of that size usually comes as 1219 mm x 2439 mm depending on material thick and type. Double check with the material supplier and re-measure again before conducting any programming for manufacturing.
  • Check whether the material width is within the width range of your turret punch press’s table range. If your turret punch capacity only allows using a material size with a 1200 mm width, do not try to use 1220 mm. In this case, the raw material must be trimmed before doing the perforating process.
  • The smallest perforated hole must be twice the size of the material’s thickness (or more) to avoid tool failure during the punching process. This is especially critical if you want to perforate strong material such as stainless steel.
  • The minimum gap between holes needs to be as wide as possible to retain the material strength. A good rules of thumb is to maintain at least a 3mm gap or twice the material thickness, as recommended by tooling Wilson international (, or according to your tool and die supplier or your machine’s operational manual. 
  • Make sure the punching sequences are properly sequenced. A good rule of thumb is to punch the smallest hole tools first, then gradually punch the bigger holes. Also remember to make sure the hole is punched in a sequential manner by starting to punch the adjacent holes to reduce rapid movement. This reduces distortion and is easier to trace during the perforating process.


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