SU747595A1 - Apparatus for producing band helix from wire - Google Patents

Description

The invention relates to the processing of metals by pressure and can be used in the manufacture of ribbon coils for vacuum devices. A device is known which consists of a rotating mandrel with a drive, pickup mechanisms and wire tension .1. However, when winding spirals onto a rotating mandrel, the inevitable deformation of the cross section of the winding tape takes place, which increases with increasing spiral pitch, as in the process of winding the spiral, elastic deformation of the tape occurs. The degree of deformation of the cross section of the coils and the magnitude of the residual elastic stresses in the tape helix are significantly higher than the spirals from the round wire due to a significant increase in the contact area of the tape with the core. During subsequent molding annealing, not all stresses are removed. The part of the stresses arising between individual crystallites (voltages of the second kind) and between the individual cells in each crystallite (the tension of the third kind) remains unexplained. This leads to an increase in the bottom meter and the pitch of the helix after it is removed from the mandrel. Therefore, with HaBtiBKe helix, the diameter of the mandrel and the helix pitch are set below the nominal dimensions of the band helix. The diameter of the mandrel and the pitch set when winding are selected experimentally for each size of the helix depending on the material and size of the helix. In addition, the known device does not allow to obtain spirals, the shape of the cross section of which is different from the original shape of the workpiece. The purpose of the invention is to improve the quality of the spiral. This is achieved by the fact that in a known device for making a tape helix made of wire, containing a mandrel with a drive and mechanisms for laying out and tensioning the wire, an acoustic head with a mode f radial transducer, including an ultrasonic

a transducer, a waveguide and a working tool that deforms the wire on the mandrel, and the mandrel is supported by a support.

Dp expansion of the technological capabilities of the device, the acoustic head is equipped with a radial mixing mechanism for the working tool, which allows to adjust the degree of deformation of the wire. To increase the stiffness

The device mandrel is supported by a support.

This makes it possible to improve the manufacturing quality of the ribbon helix and, above all, its accuracy, eliminate the need for experimental adjustment of the size of the mandrel and the pitch of the helix for each frame size and material of the helix, as well as ensure the possibility of obtaining helixes with an expandable cross section of the NIN turn.

FIG. 1 shows a device, a general VIEW} on fng. 2 - helix forming zone.

The device for the manufacture of a wire ribbon helix consists of 25 bases 1 on which the forehead of the headstock 2 (with a belt and chuck mechanism) and the back headstock 3 with the center are fixed. Mandrel 4, on which d &; the formation of the wire 5 into the tape 6 with simultaneous shaping was removed, fixed in the cartridge of the headstock 2 and pressed against the center of the tailstock 3, the tension of the wire 5 is carried out by means of the tensioning mechanism 7. An ultrasonic transducer 8, a waveguide 9 and a working tool 10 are provided with a radial displacement mechanism 11 and coaxially fixed in a rack 12, 40 mounted on the frame 13. On the base 13 diametrically opposite the waveguide 9 with pa6o4invf tool 10 is rigidly fixed ra 14 with a prism 15.

The device works as follows.

The mandrel 4 is fixed in the head of the headstock 2, pressed against the center of the tailstock 3 and installed in the prism 15. The free end of the deformable wire 5 is fixed in the hole of the mandrel 4, which is associated with rotational and translational motion. After stacking 2-5 turns, energy 11 is supplied to the ultrasonic transducer 8, which causes the working tool 1O with the help of a waveguide into oscillatory motion with a displacement amplitude A. Radial displacement mechanism 11, the working tool 10 is set to the required amount of deformation measured by a special device (in the figures not shown). There is a flattening of the wire 5 B tape 6 with the simultaneous formation of a spiral. The shaping process is carried out with a permanently tight wire 5, created by the tension mechanism 7.

F o

rmupa invention

A device for the manufacture of a wire helix comprising a drive mandrel and tensioning mechanisms E and wire layouts, characterized in that, in order to improve the quality of the band helix, it is equipped with an acoustic head consisting of an ultrasonic transducer, a waveguide and a working tool with a radial mechanism the movement of the acoustic head, made in the form of a screw pair, and an intermediate support placed under the mandrel in the place of its contact with the working tool.

Sources of information taken into account in the examination

1. Arapov V. L., Emiev V., A., Konopets S. M., and others. Electronic technology. Issue 7 (74), Series 7, 1976, p. 24-40.

Claims (1)

Claim A device for manufacturing a tape spiral from a wire, containing a drive mandrel and mechanisms for tensioning and laying out the wire, characterized in that, in order to improve the quality of the tape spiral, it is equipped with an acoustic head consisting of an ultrasonic transducer, a waveguide and a working instrument, the mechanism of radial movement of the acoustic head, made in the form of a screw pair, and an intermediate support located under the mandrel in the place of its contact with the working tool.