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TOX®-Clinching & Sheet Metal Joining

TOX®-Clinching: Riveting without rivets!

Micrograph of a clinching process

TOX®-Clinching is a simple joining technique that does not require heat or additional elements.The Clinching process produces a button-type, positive connection of two or three layers of sheet metal using a cold-forming process. It uses the solid die cavity patented by TOX® PRESSOTECHNIK. Due to its cost effectiveness and reliability, TOX®-Clinching is highly regarded by the whole sheet metal working industry. 

You would like to use the clinching process for your sheets and materials? We are offering a free of charge feasibility test in our own technology department, including test realization - request now!

Basics of the Joining – the TOX®-Joining Technology

Forming the TOX®-Round Joint

  1. Penetration
  2. Setting up
  3. Emergence of upper contour
  4. Filling of ring groove
  5. Lateral spreading of punch side material
  6. Finished TOX®-Round Joint

The principle of TOX®-Clinching:

Clinching defines a joining process according to DIN 8593 of the production technology. With the clinching process sheet metals of different thicknesses or other materials, even with adhesives or other intermediate layers are joined in a cold forming process. In industrial applications clinching is being applied for single sheet thicknesses of 0.1 mm up to a total layer thickness of 12 mm / .47" and up to 800 N/mm2 / 5.7 lbf/in2 tensile strength.

TOX® PRESSOTECHNIK offers all the components needed for the Joining Technique: from technical support provided with the TOX®-Test Report, as far as complete turnkey plants. Many satisfied customers in the automobile, white goods and computer industries, as well as machine integrators confirm: "You can rely on TOX® PRESSOTECHNIK!"

Learn more about TOX®-Clinching and the different clinching point shapes.

The strength behind the TOX®-Joint

In the TOX®-Round Joint process, the material strain hardening in the neck area and the lacking of any notch effects produce the high retaining forces. This is the direct result of the fixed, rigid die. Static strength up to 70% of a spot weld, with positive strain hardening, without damage to the surface coating and typically more economical.

Fatigue strength under the most adverse conditions

Corrosion tests have shown that because the surface coating is not damaged during the round joint process, the anti-corrosive properties of the joined sheet metals, e.g., aluminized or galvanized, are maintained. The TOX®-joining does not cut the surface of the materials to be joined, as the coating flows with the material and remains intact. 

Quality Control - The control dimension "X"

Resistance to pull and shear loads is dependent on the control dimension “X”, provided that the joining parameters and the service life of the tools have been observed. 

Advantages of the TOX®-Clinching Technology


Economical - clinching is significantly more cost efficient than spot welding


Reliable - we guarantee joint strength values


Versatile - clinching is usable for numerous material combinations


Environmentally friendly - clinching is energy saving, clean and quiet


User oriented - technology and all production equipment comes from TOX® PRESSOTECHNIK

For many metal joinings, TOX®-Clinching is the optimal, most favourable and environmentally sound solution.

More advantages:

  • Sheet metal joining using only the parent materials
  • Best solution even for different material combinations
  • Total sheet thicknesses from 0.3 mm up to 12 mm
  • No damage to the surface
  • No contamination or rework
  • Can also be used with intermediate layers such as glue or paper
  • No heat generation / no sparks
  • High dynamic strength
  • Long tool life
  • Excellent process monitoring capabilities
  • Decades of experience

How to join dissimilar materials and multi-layer joints?

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Joining of Stainless Steel

Stainless steel presents special requirements for forming processes. The required higher forming forces result in higher surface stresses on the joining tools. The TOX®-Joining Technology can be used safely and efficiently even for stainless steel applications. Continuous tool development and experience with many applications have resulted in high tool life.

How to join die cast material?

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Customer Projects with TOX®-Clinching
see the abilities of "TOX® in Action"

Clinching Equipment

Below is a list of our machines that can be used in joining applications.

Please contact us to request a quote today.

As clinching specialists, we have expertise in the following areas:


Related topics

Request TOX®-Test Report

Read more

TOX®-Clinching Tools

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PILIH d.o.o.
Ob Dragi 5
3220 Store
Phone: +386 3 7802050
Fax: +386 3 7802052
SL: +386 3 7802050 Contact form
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