PL170366B1 - Non-releasable pin-type joint for jointing together metal sheet components - Google Patents

Abstract

An inseparable connection of the axle, collet type with sheet elements, characterized by the fact that the material of the element (2) has at least one peripheral frame crimping the axle (1), which is an imprint of the circumferential protrusion (5) with the most preferably triangular cross-section of the matrix (4), formed in the process of forming the tab (6) with the punch (3) of the radial riveter head. E L 170366 B 1 (5 4) Non-detachable connection, wasp type, col with sheet elements PL

Description

The subject of the invention is an inseparable connection of parts such as axle, pin, cylindrical hitch with a flange, etc., with sheet metal elements used in electrotechnical products, consumer equipment, parts of machines and devices, etc.

As in the connection of the axle, pin and sheet metal elements known from utility model No. 44405, there are contradictions between the technology of embedding the parts and the structural function of these parts in the product. This contradiction was the need to obtain high hardness of the pin or axis, which in turn reduces the plasticity of the pin or axis so much that it is impossible to shape the connection. According to this solution, the sheet material was upset by crimping the pin in the slot with material extruded from the sheet. You can also use parts such as axle, pin, which have a special recess for classic riveting, which requires the use of a step as a support for a sheet metal element. Such preparation of parts for joining has a significant impact on the costs of products, especially in small and medium-series production.

The aim of the invention is to introduce a joint that, due to the simplicity of its implementation, can be introduced in small and medium series production. This simplicity of implementation enables the use of known, fast and cheap technologies and typical commercial connectors for connecting.

The invention is illustrated in the drawing, which shows the state after connecting. The axis 1 is inserted into the die hole 4, which has an abutment surface in its lower part, ensuring the achievement of the dimension H. The abutment surface can have a different shape, depending on the shape of the flange. The upper surface of the die 4, on which the sheet-metal element 2 is placed, has a circumferential projection 5, preferably triangularly shaped. Under the influence of the force of the shaping tool 3, the rivet head 6 is formed, and at the same time the circumferential projection 5 of the die 4 is indented into the sheet material 2, and thus the appearance of a negative play in the bottom of the joint within the circumferential indentation. A closed state of stresses within the sheet metal and rivet head is achieved. There is a strong upsetting of the neck within the sheet and the formation of a head of any shape, while the diameter of the pin below the circumferential projection in the die remains unchanged.

170 366

170 366

The Publishing Department of the Polish Patent Office of the Republic of Poland Circulation 90 copies Price PLN 2.00

Claims (1)

Patent claim An inseparable connection of the axis, pin with sheet metal elements, characterized in that the material of the element (2) has at least one circumferential groove crimping the axis (1) constituting an imprint of the circumferential projection (5) with the cross-section most preferably of a triangular die (4), formed in the process of forming tabs (6) with punch (3) of the radial riveter head.