Como escolher corretamente o óleo de estampagem para diferentes materiais?

How to correctly choose stamping oil for different materials?

The application of stamping oil is very extensive, but not all stamping factories use stamping oil. Some factories, in order to save surface costs, may use waste oil or engine oil for general materials, rarely using professional stamping oil.

In the stamping process, due to the different stamped materials, the working speed of the stamping machine, the stretch rate of the part, the shape of the part and the requirements of subsequent processes, all these factors determine the type of stamping oil they use .

Therefore, when choosing stamping oil, it is necessary to carefully investigate the following aspects:

  • What type of stamping process is it: punching? Deep drawing? Thin wall design? To bend?
  • What is the material of the part: what type of steel? Aluminum, copper, alloy, silicon steel sheet?
  • What is the stretch rate? How many times is deep?
  • What is the tonnage of the stamping machine? Working speed?
  • What is the shape of the workpiece? Where are the problems presented by waste in experimental printing?

To answer these specific questions and understand the customer's actual situation, you can more accurately choose the suitable stamping oil.

At present, the stamping industry generally still prefers oil-based stamping oils, and in most cases, the choice of oil-based stamping oil formula still depends on the factory's usage habits.

So what are the specific requirements when choosing stamping oil for some common stamping materials and materials?

  • If the material to be stamped is silicon steel sheet, which is relatively easy to punch, most requirements are that after punching, the surface of the part can dry quickly without oil residue. At the same time, it is necessary to prevent the formation of burrs during punching and extend the service life of the mold. Therefore, if it is stamping oil for silicon steel sheets, choose one with a little higher viscosity, capable of volatilization, does not produce carbon residue after annealing, and has certain anti-rust performance.
  • If the material to be stamped is tinned steel sheet, consider choosing a stamping oil that does not contain chlorine to avoid bleaching the surface of the part.
  • If the material to be stamped is aluminum or aluminum alloy, do not choose stamping oil containing chlorine and sulfur additives, otherwise it will be easily oxidized. It is generally recommended to choose embossing oil with neutral PH.
  • If the material to be stamped is stainless steel, the stamping process tends to harden. It requires the use of stamping oil with high oil film strength and good anti-sintering properties, and the stamping oil must have a certain viscosity and good cooling properties.
  • If you are stamping copper or copper alloys, do not choose stamping oil that contains chlorine and sulfur additives. Choose embossing oil with oily agents and good fluidity.
  • If you are stamping stainless steel, it is generally recommended to choose a special stamping oil for stainless steel, which requires high anti-wear properties, no burr on the workpiece and obvious mold protection function.

Based on the need for volatilization, stamping oil can be simply divided into non-volatile stamping oil and volatile stamping oil.

Volatile stamping oil is especially suitable for high-strength operations such as punching, stamping, threading and grooving. It is also very suitable for plastic forming processing.

The formula to be chosen depends on the stamping material, process characteristics, post-processing characteristics and other requirements.

Recommended for you:

  • The Ultimate Guide to Metal Deep Drawing
  • The Ultimate Guide to Stainless Steel Materials
  • The Ultimate Guide to CNC Turret Punch Press
  • The definitive guide to steel
  • Essential copper applications you need to know
  • Sheet Metal Design Guidelines for Manufacturing: Engineer's Handbook

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