ECKOLD clinching technique
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Clinching technique

ECKOLD clinching technique – the joining method of the future ECKOLD clinching is an innovative, proven technique for the joining of sheet metal and profiles. The workpieces are permanently joined by local cold forming – doing away with fixtures and auxiliary parts. The main advantage of this joining method lies in the fact that a positive joint is formed directly from the sheet metal material. The technique is also suitable for the joining of workpieces of different materials and thicknesses. As there are many different requirements that joints must meet, ECKOLD offers t ailor-made tools...

Joints that last • Available clinching types Standard clinching S-DF Round clinching R-DF Round clinching with rigid die G-DF Clinching with prepunched hole CONFIX • Single layer thickness 0.5 – 4 mm / depending on clinching type • Total thickness 1.0 – 6.0 mm / depending on clinching type • 2 – 4 sheet metal layers • Hybrid joining (steel / adhesive / aluminium) • Trendsetter in clinching technology • Decades of experience • Worldwide service network Sealing strip clamp Dashboard panel  Rear shelf Radiator grille Window lifter Seat shell Auxiliary heater  Target sectors White goods...

The key to our success: our comprehensive product programme … … including many tool options and versions and a complete range of machines from s tandard units to turnkey production plants. Large choice of clinching tools Cordless devices Hand-held portable devices with pneumohydraulic drive Pressing tools Stationary, hydraulically powered machines 4  |  Eckold – Clinching technique Stationary, servo-motor driven machines Hand-held portable devices, pneumaticall

Tailor-made solutions • Servo motor-driven clinching systems • Lightweight frames • Clinching devices and plants Servo motor-driven clinching systems CONFIX frames Clinching fixtures and plants Lightweight frames Clinching technique – Eckold

How does clinching work? • Clinching is a forming process for the joining of thin workpieces, tubes and / or p rofiles made in steel, stainless steel, non-ferrous metals (in particular aluminium). • Clinching allows for the connection of two or more overlapping workpieces by means of local cold forming. • The main advantage of this joining method lies in the fact that a positive joint is formed directly from the sheet metal material. There is thus no need for auxiliary materials or fixtures such as soldering flux or rivets. • In the clinching process, the sheet materials are partly pushed...

Cost-effective method Cost comparisons by customers and i ndependent bodies show that ECKOLD clinching is significantly cheaper than any other joining technique. Depending on the actual task and taking into account both capital and running costs, the total costs for the production of clinched components are up to 55 % lower than with spot welding. Sustainability Everybody who has been exposed to toxic welding fumes, or knows how welding and personal protective equipment weigh down on the body appreciates the many advantages of ECKOLD clinching for workers. ECKOLD clinching protects the...

Unrivalled range of options for customer-specific applications Clinching type S-DF • Low-cost tools • Torsion-proof element • Also suitable for joining more than two sheet metal layers • Recommended for workpieces of different forming b ehaviour (e.g. steel / aluminium) Clinching type S-DF, beam-shaped clinching element Steps with clinching option S-DF Shear strength, transverse 1) Shear strength, longitudinal 1) mild steel mild steel Cross tension strength 1) aluminium mild steel Clinching type R-DF • Circular, fluid-tight clinching element • Suitable for various material thickness...

Clinching type G-DF • Circular, fluid-tight clinching element • Symmetric shear strength • Minimum workpiece deformation • More compact than opening tools (R-DF) • Particularly recommended for workpieces of different forming behaviour (e.g. steel / aluminium) • Particularly recommended for workpieces of poor forming behaviour (e.g. die-cast aluminium) Clinching type G-DF, round clinching element Steps with clinching option G-DF Clinching type CONFIX • Round element with small or no die-side protrusion • Symmetric shear strength • Joining of workpieces where die-side element is made from...

Quality assurance and process monitoring For quality assurance, ECKOLD offers a manual method as well as an online process monitoring tool. For the manual assessment of the clinching element quality, the b ottom thickness and the element width need to be examined. The online process monitoring system allows for seamless and continuous 100 % q uality control, for instance in series production plants. The special software developed by ECKOLD visualises both the machine control and all processes that need to be monitored on a single human machine interface (HMI). For process monitoring, the...

There are many good reasons that speak for ECKOLD clinching Advantages and characteristics • No thermal stress at joining point → No interference with workpiece material properties → No deformation in workpieces • Joining of workpieces of different thickness and made from different materials • Flexibility with regard to joining direction • Various workpiece thickness combinations can be machined with a single tool set • Suitable for hybrid joining (combination of gluing and clinching) • No need to prepare workpiece surfaces • Joining of coated workpieces (metallic, organic coats) without...

• Test runs and analyses for customers • Production of sample sheets / workpieces • Feasibility studies for tool dimensioning • Process planning and implementation of technical solutions • Production at own factory • Commissioning at customer premises • Routine maintenance service • Customer support for process optimisation – Assistance in teach-in process for robot positions – roduction of microsections / assessment of P clinching point quality – Online support • Continuous assistance from commissioning to SOP • Training of operators / maintenance technicians /  machine experts Facts &...