Tool design and manufacture

In-house tool design

GrisGroup is a member of, and an expert in, standards bodies (UNM AFNOR-ISO) and research bodies (CETIM), as well as the German fastener trade association (DSV) and the German flat steel fabricators’ association (IBU).

Our expertise lies in the collaboration of dozens of mechanical engineers and technicians from our R&D, design and manufacturing departments. This collaboration ensures constant quality and optimisation of tooling to guarantee maximum service life.

Our resources:
adapted and modern tools

The design office is equipped with CAD workstations to design and manufacture tools dedicated to the specific problems of each customer.

Software: Solidworks, COLDFORM®, Logopress
Machining processes: turning, milling, electro-erosion, grinding

Applied research

• Numerical simulation of cold deformation (analysis of springback, anticipation of deformation, etc.)
• Tool sizing

Product research and co-design

At the customer’s request, development and Ecotech according to product configuration:

• Process-product adaptation
• Proposal for technical savings resulting from product modifications (resizing, lightening, mechanical characteristics)

High-Speed Die-Cutting Using compound dies

Covering the whole range of washers for bolted assemblies, our compound die-cutting tools produce washers that are perfectly flat and perfectly concentric at very high throughput.

• Fully automated 200-tonne lines
• Thickness: 0.5 to 7 mm
• Manual stamping presses from 160 to 250 tonnes
• Maximum thickness: 10 mm

High-Speed Transfer

Transfer technology is applied for the manufacture of more complex items, again at high throughput.
The principle consists in producing an item by performing successive operations continuously with the possibility of combining different technologies.The Gris Group’s strength lies in its experience in controlling
material movements during high-speed striking operations.

• 250 and 630 tonne transfer presses

High-Tech Cold Forming

Guaranteeing perfect geometric control of inside and outside diameters and surface condition, this high-precision process is used for calibrating, shaping, marking and stamping.

This technology is an economic alternative avoiding the need for surface and/or diameter grinding, fine cutting and specific machining operations.

• 150-tonne cold forming lines
• 750 strokes/min
• Controlled and calibrated geometries

Progressive Die Stamping

Progressive stamping is one of the best metalworking method that can encompass punching, coining, bending and several other ways of modifying strip band material, combined with an automatic feeding system.

The feeding system pushes a strip of metal (as it unrolls from a coil) through all of the stations of a progressive stamping die. Each station performs one or more operations until a finished part is made. The final station is a cutoff operation, which separates the finished part from the carrying web.

• Fully automated lines from 25 to 315 tonnes
• Thickness: 0.10 to 5 mm

This versatile machine uses a digitally controlled laser head for thermal cutting of sheet metal.

Ideal for small and medium production runs, as well as prototyping, the machine is equipped with a sheet metal loader and automatic unloading of skeletons and cut parts.

The machine is highly responsive and adaptable thanks to its programming principle, which requires no special cutting tools.

Sheet thickness :

• Standard steel: up to 20 mm
• Stainless steel: up to 10 mm
• Aluminium: up to 8 mm

Our wire-forming machine offers an advanced and precise solution for the manufacture of technical parts. Thanks to this innovative technology, we are able to meet our customers’ needs for bespoke parts, while guaranteeing high quality and reliability.

In this process, the wire-forming machine automatically works the material to produce the final shape by winding and welding the wire.

No material is wasted in the process, which contributes to more responsible resource management and a reduction in the environmental footprint of production.

With over 10 years’ experience in double-sided grinding, GrisGroup has developed unique expertise in this field.

We have one of the largest fleets of double-sided flat grinding machines, equipped with different loading systems (linear and rotary) with high productivity and fully automated.
GrisGroup’s main objective is to meet its customers’ demands for precision, quality and ever-increasing lead times.

• Precision down to the micron!

Objective: zero defects
thanks to laser cameras

In order to meet the most stringent quality requirements of major customers, particularly in the automotive industry, GrisGroup has a large fleet of high-performance optical sorting machines.

These fully automated lines detect shape and surface defects, and can also automatically package our parts.

All this equipment enables us to guarantee our customers ‘zero defects’, i.e. less than 5 ppm!

RoHS Directive

Sur les restrictions d’utilisation de certaines substances dangereuses dans les équipements électriques et électroniques et notamment la suppression de six métaux lourds

ELV Directive

End-of-life vehicles: it organises the recovery, recycling and processing of car wrecks.

REACH regulations

It defines a single integrated system for the registration, evaluation and authorisation of chemicals in the European Union.