THE TECHNOLOGY OF PRODUCING OF STAMP-WELDED LIGHT WEIGHT CASES FOF ELECTRICAL CABLE SEALING


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Abstract

The application of technology of production of light-weighted shielding cases for on-board equipment connectors using the turning method is accompanied by the low coefficient of material using, considerable labour costs, and the increased product weight.

For reduction in weight of electrical plug connectors the authors suggested to produce cases of electrical connectors from a sheet-like material which ensures radio interference caging. Aluminum foil with the thickness of (0,1 ÷ 0,2)∙10-3m has the best indices of low volume weight and shielding.

The suggested technology of production of light weight shielding cases includes the following processes such as the elastomagnetic-pulse stamping (EMPS) of a blank part, the magnetic-pulse welding – forming (EMPF) and the screwthread chasing.

Magnetic pressure in the suggested EMPF scheme influencing blank part walls has the shape-generating effect according to the matrix configuration and the welding effect in the zone of cross threading.

The basic parameters of EMPF modes for different size types of cases made of aluminum foil are the following: the energy stored in condensers batteries, the operating current frequency and the charging volume of capacity storages.

According to the agreement with the Ministry of Education and Science of the Russian Federation, the agreement № 14.574.21.0049 dated the 19.06.2014, the unique RFMEFI57414X0049 identificator, rapid adjusting universal equipment – a double-acting press was built. It ensures both static and pulse load in a single set and allows performing of all stages of technological process of connector cases production in one and the same device.

The double-acting press consists of the process unit for static loading and the pulse current generator with the induction dynamic drive for pulse loading.

To optimize the technology, a discharge processes measuring assembly was installed. It includes the devices for registration of discharge circuit current and its frequency, magnetic pressure and physical parameters of double-acting press, both active and inductive discharge circuit resistance and the capacity storage unit.

The measuring assembly will allow carrying out the analysis of welding joints.

About the authors

Stanislav Valeryevich Nescoromny

Don State Technical University, Rostov-on-Don

Author for correspondence.
Email: nescoromniy@mail.ru

candidate of technical sciences, assistant professor of the Department «Machinery and automation of welding production»

Russian Federation

Yevgeny Lvovich Strizhakov

Don State Technical University, Rostov-on-Don

Email: strizhakov@inbox.ru

Doctor of Engineering, Professor of the Department «Machinery and automation of welding production»

Russian Federation

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