SU984569A1 - Helix production apparatus - Google Patents

Description

(54) DEVICE FOR MANUFACTURING SPIRALS

one

The invention relates to the processing of metals by pressure, in particular to the manufacture of corrugated heating elements.

A device for the manufacture of corrugated products is known, comprising a drive disposed on the frame, a strip corrugation unit made in the form of two interacting toothed discs whose tooth size corresponds to the size of the spirals, a calibration node and a segment of spirals 1.

The disadvantage of the device is that the disks of the mechanism of the preliminary corrugation are rigidly fixed one against the other. The distance between their centers is unchanged. The shirring of the strip is carried out by uniform rotation of the rolls, which create a bending force across the entire strip, which leads to the appearance of deformation elements and stretching on straight sections of the helix.

Due to the inadequacy of the rigidity of the tape, the wires are corrugated. The height of the corrugation is determined by the height of the tooth of the disk.

The purpose of the invention is to increase productivity and improve the quality of the spirals.

The goal is achieved by the fact that one of the toothed disks is made non-water and spring-loaded in the direction of the other, the size of the tooth's side surface is equal to the height of the resulting helix, and the copying unit is designed as symmetrically installed with respect to the feed axis of the strip of punches and two matrices mounted at an angle to the axis the feed and cam-cam mechanism connecting the punches and dies together.

15 In FIG. 1 shows a schematic of the proposed device, a general view; in fig. 2 metal strip feeding unit; in fig. 3 - node flexible; in fig. 4 - node forming the vertices of a curved strip. The device contains mounted on the bed 1 and kinematically interconnected bobbin 2 with a metal strip, rollers 3 for straightening the strip and its direction into the delivery unit, two rollers 4, guide 5, spring 6, two disks 7 and 8 with a saw-tooth surface, two dies 9, two punches 10, two lamellar springs 11, a guillotine knife 12. One of the rollers 4 is mounted stationary on the frame, and the other has the ability to move perpendicular to the metal strip. The guide 5 is fixed at one end to the frame 1 with the possibility of angular movement in its plane. The free end of the guide is provided with rollers 13, which ensure the direction of the metal strip to the bending zone. The spring 6 creates a compressive force of the metal strip. The disk 7, which provides the movement of the metal strip, is installed on the shaft of the drive mechanism 14 mounted on the Lower side of the frame. On the shaft of the drive mechanism 14, there is a distributional crackle, through which the kinematic coupling of all units of the device is carried out. The disk 8 is located on the axis of the carriage 15 installed in the guides 16 on the frame 1 so that its lower end enters the stina hole, which has an oblong shape, which makes it possible to move the carriage 15 in the horizontal plane. In the lower part of the carriage 15, the rod 17 is rigidly fixed, capable of moving also in the horizontal plane in the support 18. On the rod 17 there is a spring 19, which creates the force required to bend the metal strip. Two matrices 9 are fixed rigidly on the frame of a symmetrically supplied strip and each at an angle of 7 ° to it. Each of the punches 10 by means of rocker arms 20 is hingedly mounted on one of the ends of the sliders 21 mounted on the frame. At a distance of 10 mm from the center of attachment of the rocker arms 20 in the lower part of the sliders 21, the followers 22 are mounted, the rollers 23 of which interact with the cam-cam mechanism 24. At the free ends of the sliders 21, cylindrical projections 25 are made, interconnected by means of an tension spring 26 and interconnected with the cam-cam mechanism 24 by means of rollers 27. The shape of the dies 9 and punches 10 is determined based on the electrical and structural parameters of the spiral. One of the sliders 21 is mechanically connected to the counter 28 of the number of bends of the helix, which in turn is electrically interconnected with the guillotine Knife 12. The control knobs 29-31 are used to set up the device. A device for producing sawtooth spirals operates as follows. By pressing the button 32, a drive mechanism 14 is activated, with which all units of the device are kinematically connected. The metal strip from the rotating reel 2, aligned with the rollers 3, flows between the rollers 4, which, rotating at a given speed in opposite directions, capture the metal strip with a force determined by the spring 6 and feed it between the rollers 13 of the guide 5. The guide 5 is placed in such a position that the moving metal strip is linearly fed by the rollers 13 into the zone, flexible between the teeth of the disks 7 and 8. The disks 7 and 8 rotate in opposite directions at a speed of 34 rpm so that the teeth of one of them enter in n a nd between the teeth of the other. The metal strip is caught by the teeth of the discs 7 and 8, which bend it. The metal strip bent by the discs enters the zone of the punches 10. One of them captures the vertex of the bent metal strip and Guides the strip to the corresponding matrix where its top is formed. For the time it takes to complete the formation, this punch stays in a fixed position. At the same time, the cam-cam mechanism 24, rotating, lifts the second punch 10 by means of the rollers 23 and the pusher 22 to the upper position. The slider 21 is interconnected with a roller 27 which rolls around the outer surface of the distribution mechanism. The slider 21, interconnected with the cam-cam mechanism 24 rolling around the outer surface 24 with the force generated by the spring 26, moves this punch to the next vertex of the curved strip. The pusher 22, moving along the cam-cam mechanism 24, by means of the spring 11, lowers this punch 10 to the lower position. After that, the slider 21 moves this punch 10 until it captures the vertex of the curved strip. At the moment of its capture of the bent metal strip vertex, the stationary punch moves along the cycle described above. According to the amount of movement of one of the punches 10, the counter 28 counts the required number of bends of the metal strip. The guillotine knife 12 cuts the resulting helix. The use of the proposed device in comparison with the existing ones allows increasing labor productivity in manufacturing spirals of electric heating elements from a metal strip more than 10 times, by automating the process of their manufacture, improves the quality of the manufactured spirals due to the absence of sections with residual deformation of the metal strip. , increases the service life of the spirals of the heating elements by 2-3 times, since they lack areas with large electrical resistance, and also increases the fenloof of the heating element for

by increasing the working area when the flow of air around the spiral.

Claims (1)

Invention Formula An apparatus for the manufacture of coils, preferably for heating elements of a metal strip, comprising the housed; On the frame, a drive, a strip corrugation unit, made in the form of two interacting toothed disks, the tooth size of which corresponds to the helix size, a calibration unit and a helix section, characterized in that, in order to increase productivity and improve the quality of the spirals, one of the toothed disks made continuous and spring-loaded in the direction of the other, the size of the side surface of the tooth is equal to the height of the resulting helix, and the calibration unit is designed as symmetrically set relative to the axis of the POL. СУ of two punches and two dies mounted at an angle to the feed axis, as well as a cam-cam mechanism connecting between the punches and dies. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 204288, cl. B 21 D 13/04, 1965 (prototype). 3 J2. / J W 28 Phage.1 2 2 7 Sh f 2B 10 L J E L 20 21 LDD