SU1470995A1 - Threaded fastener and method of producing same - Google Patents

Abstract

The invention relates to electrical engineering and can be used as a fastener and a detachable contact in electrical circuits of mechanisms and devices, which, according to the conditions of operation, should have a minimum weight, low electrical resistance and long life. The purpose of the device is to enhance the functionality of the threaded fastener. The purpose of the method of manufacturing a threaded fastener is to reduce the level of process stresses while reducing the labor intensity and improving the accuracy of manufacturing. The threaded fastener is made of flat billet by notching, making the thread. Then the workpiece is bent, forming a hollow glass. In the upper part of the element there are areas bent to the outside, on which a material with high electrical conductivity is applied. Thus, the fastening element can simultaneously serve as a contact element. 2 sec. f-ly, 9 ill.

Description

The invention relates to general and precision engineering, electrical engineering and can be used in all sectors of the national economy as a detachable contact in the electrical circuits of mechanisms and devices that, according to the conditions of operation, should have a minimum weight.

The aim of the invention is to enhance the functionality of the device and reduce the level of technological stresses while reducing the labor intensity and increasing the manufacturing accuracy for the method.

Shown is a contact assembly with a threaded fastener, a slit; figure 2 - element view

from above; on fig.Z - section AA on. figure 1; 4 to 9 are views of an element at various stages of production from the blank (tape) to the finished element.

The contact node consists of a threaded fastener 1 with three contact zones, device heads 2, gaskets 3, washers 4, nuts 5. The threaded fastener 1 in turn consists of a threaded rod 6 connecting the jumpers 7, head plates 8 hexagon locking element 9.

The presence of two parts of a glass, connected in its lower part by a bottom (jumper), on which the exchange is complete with a single sleeve, and locks, coupling 1G; 11 | Pi-1.x petals H

WITH

from cd

the screw head allows to provide the necessary rigidity of the screw in all directions and its self-stopping after tightening. The fixation of the element relative to the support element is effected by means of a hexagon located under the supporting part of the head.

The use of a tape blank and its subsequent processing with progressive technological methods ensures the almost complete elimination of technological (internal) stresses and associated microdefects, which allows to increase the service life and reliability of the contact by 2-2.5 times as compared with the known method. The introduction of longitudinal blind cuts allows you to reduce the bending force by more than 3 times, which allows you to combine, along with other design and technological solutions, the power consumption of the fastening element by an order of magnitude. When assembling the contact-25 st. Rod core located under

head supporting part, made in the form of a hex,

During the tightening process, a torque is applied to the nut 5, the plates 8 of the head of the device are rotated and the locks are fully closed, providing a rigid connection between the semi-30 canals of the rod and their locking. In the process of storing and transporting the element, the locking device ensures the mutual fixation of the half-glasses in the direction perpendicular to the axis -j of the element

The proposed method of manufacture is that a tape is taken as a blank, the width of which is

2 ,, A method of manufacturing a threaded fastener from strip blanks by notching the blank, applying thread and bending, characterized in that, in order to reduce the level of technological stresses while reducing labor intensity and improving the manufacturing accuracy, a flattened flat material is formed on the blank element without separating it

Then the element is separated from the tape, joined into a glass and a finishing rolling calibration of the thread is performed.

Claims (1)

1. A threaded fastener containing a rod with a thread in the form of a glass consisting of two parts connected at the end with a jumper and a head formed in the upper part of the rod divided into several plates with bevels at the base of the NII and rectangular sections at the ends The plates are bent in place, bevels and form a head supporting part, characterized in that, in order to expand the functionality, the rectangular sections of the plates are bent outward and form an annular and face surfaces that are covered with a mat. ialom with high electrical conductivity, and 2 ,, A method of manufacturing a threaded fastener from strip blanks by notching the blank, applying thread and bending, characterized in that, in order to reduce the level of technological stresses while reducing labor intensity and improving the manufacturing accuracy, a flattened coytur of the fastener is stamped on the blank without separating him equal to 0.45-0.5 of the circumference of the medium from the tape, the center of symmetry of which the centering hole of the web is made, the threads are made by rolling between two rolling rollers, forming the external and internal thread profiles, the material is applied with high electrical conductivity in the contact zones, the flat billet is bent in a semi-glass relative to the centering hole of the web with simultaneous flexible head plates, from the tape, put it into a glass, and carry out a finishing rolling - thread calibration. It has a thread diameter, and a thickness of 0.1 0.12 is the diameter of the screw, stamping it with: obtaining a flat sweep of the original screw contour with a cut-out on the inner surfaces of the parts of the stack, while the center of symmetry of the element is the centering hole of the web. Then, the thread profile is rolled with two rolling rollers, a coating of material with high electrical conductivity is applied to the contact zone. The head plate is bent about CH5 C) i, 1 Fig.28 Al Fig.Z Fsh 5 .at 4V4N FIG. - " .7