Manufacturing complex cold-formed parts individually and economically

Under the brand name Conform, ARNOLD UMFORMTECHNIK GmbH & Co. KG develops complex cold-formed parts for multi-functional applications. Such parts are in fact solutions worked out individually with each customer to meet their particular requirements. Very often they are parts developed for the electric vehicle market, or for lightweight construction.

Chip-free manufacture of complex precision components for series applications with cold-forming. (ARNOLD UMFORMTECHNIK GmbH & Co. KG)

According to ARNOLD, the design of the component must be chosen to ensure that it can be produced using cold-form technology. In certain cases, the component may need to undergo some post-production machining, for example when hollow parts are manufactured with an internal thread. When choosing the production technology and looking at the costs involved, it is important – right at the start of the development process – to consider capacity. Functional samples, produced by ARNOLD during the design and development stage, support the process. In other words, the final design of the cold-formed parts is ready for the initial production run or the start of series production, with no further changes needed.


Marius Fallmann

„Ever-increasing tolerance requirements are being placed on components. So it is important that we work alongside the customer as early as the design and development stage. That derives the greatest benefit for the customer,”
Marius Fallmann, Conform® Team leader at ARNOLD UMFORMTECHNIK

There is a demand for aluminium and copper parts

AUT has been manufacturing Conform parts for several years now. In the past few years, the range of manufactured products has changed. Weight reduction and conductivity in aluminium parts have become increasingly important. And there is also a demand for copper parts because of their good conductivity. Examples of ideal applications are precision parts, toothed parts, hollow parts and nuts and bushes. As a rule, Conform products are produced on presses that have between five and seven stages. Depending on the geometry requirements they may require post-production rolling or some machine finishing. Of course, the biggest cost benefit occurs when cold-forming alone meets all the requirements and the part can be produced without a finishing process. Another advantage of the Conform process is that Arnold Umformtechnik has its own tool-making department. The majority of the tooling is produced in-house.

Technical and commercial benefits for customers

Technical and commercial benefits for customersDue to this development in the emobility sector, the enquiry process has also changed. According to ARNOLD , it is necessary to assess, for example, conductivity, strength requirements for copper and aluminium – which are rather soft – and also copper-chromium-zirconium or the surface voltages too. When it comes to the battery, of particular importance is the seal of the fastening solution as well as how the appropriate seal concept is drawn up. The result is that, together with the quotation for producing the part, customers receive a proposal drawing for cost-optimised implementation, as well as a manufacturing feasibility assessment. As an option, customers can also commission a carbon calculation as early as the development stage. Using its own carbon calculator – developed in-house – ARNOLD can determine the Product Carbon Footprint for the part the customer is enquiring about, and can then work with the customer to improve it.

Picture 2: A multi-functional fastener manufactured by cold-forming. (ARNOLD UMFORMTECHNIK)


Manufacturing complex cold-formed parts individually and economicallyWith Conform parts ARNOLD’s customers are not only obtaining weight savings in their multi-functional fasteners. They are also able to generate many benefits. Customer-specific geometries can be handled, as can individual material selections, along with an early check of the series run. As well as the technical benefits, Arnold also asserts that cost-savings of up to 80 per cent can be made, the number of parts and handling can be reduced, assembly time can be shortened and development time cut with Fastener Express.

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