Sealing and technical cleanliness as a quality feature

Connection technology Sealing and technical cleanliness as a quality feature

2024-04-12 Source: Arnold Umformtechnik | Translated by AI 2 min Reading Time

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Technical cleanliness is a quality feature for a connection. Especially in electromobility, the correlation between technical cleanliness and tightness is gaining more and more importance. Arnold Umformtechnik offers the appropriate service for this.

Tightness applications such as battery boxes, end or connection assemblies are often the focus of tightness and cleanliness considerations.(Image: Arnold Forming Technology) — Tightness applications such as battery boxes, end or connection assemblies are often the focus of tightness and cleanliness considerations.
(Image: Arnold Forming Technology)

The topic of Clean & Tight is important for many connecting elements. It particularly focuses on watertight installations such as battery boxes and terminal assemblies. It also has significant importance in the electronics industry, for example, when conducting paths lie close to each other. For oil-leading systems as well as sensor technology for autonomous driving, clean connecting elements are also vital.

The Arnold Umformtechnik is also indispensable. The company investigates the foundations for ensuring tightness and cleanliness, specifies applications and analyses the influencing factors on the system. The company has been active in the field of technical cleanliness for many years.

Requirements for technical cleanliness

The requirements for technical cleanliness originated in the automotive industry. Today, universally applicable standard works establish a standardized framework for achieving technical cleanliness, such as VDA19.1 for testing technical cleanliness, VDA 19.2 for technical cleanliness in assembly; also ISO 16.2.3.2 as well as a guide to technical cleanliness for the electronics industry from the Electrical and Digital Industries Association ZVEI.

Comprehensive equipment for leak testing

At Arnold Umformtechnik, we have extensive equipment to investigate tightness and technical cleanliness. For the area of tightness, this includes two leak testing rigs that measure with test gas:

a mass spectrometry, which uses helium as a test medium and
a differential pressure method, which uses air as a test medium.

With another leak test stand that uses water as a test medium, an IPX7 certificate can also be provided. For cleanliness analysis, it is important to detect the actual particle load of the components. At Arnold, the dirt particles are detached from the component and collected in an extraction cabinet. The evaluation follows: For example, an evaluation with a light microscope is possible, with which the length and width of the dirt particles can be determined and can be classified according to metallic shiny and non-metallic shiny. The mass of the particles can be determined with a laboratory scale. With a scanning electron microscope, the exact chemical elements of a protective particle can be determined. In addition, conclusions can be drawn about the source of error. A residual magnetism testing device is also available.

Technical cleanliness through all process steps.

The goal of the Clean & tight investigations at Arnold Umformtechnik is to ensure a reliable assessment of the tightness of the connecting elements in relation to customer applications. In addition to the statement about how tight the components are, long-term influences such as corrosion or environmental influences should be evaluated. From all these investigations, it can be concluded which connection solution meets which tightness requirements. The Cleancon concept developed and patented by Arnold ensures technical cleanliness across all process steps.

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