SU1624608A1 - Method of electric mashine production - Google Patents

Abstract

The invention relates to the technology of manufacturing electrical machines and can be used in the electrical industry. The aim of the invention is to improve the quality of manufactured products by improving the accuracy of the geometry of the magnetic circuit and eliminating the deformation of the teeth. An electrical steel tape with teeth is wound onto the rib by rolling between two tapered rollers 1 and 2 rotating in bearings 3 and 4. The angle y between the rollers and the minimum distance D are chosen from the condition of the preliminary radius of the tape. During rolling, external calibrating stops and internal calibrating stops 7 springed against the disk 8 by springs 13 are used. The disk is rotated by a shaft 17 located in bearings 18 from the electric motor 19, which provides a peripheral speed of the stops 7 equal to the speed of the tape. The forces from the internal calibrating stops are transferred to the bottom of the grooves between the teeth, starting from the zone of contact of the rolled part of the tape with the rollers using, for example, a pressing device 12. 5 Il. k О ю 4 О О 00 8 l 17 Figure 1

Description

The invention relates to the technology of manufacturing electrically): machines and can be used in the electrical industry.

The aim of the invention is to improve the quality of manufactured products by increasing the accuracy of the magnetic core geometry and eliminating the deformation of the teeth.

FIG. 1 shows the scheme of winding on the edge of the tooth zone of the stator; in fig. 2 - the same, a rotor with one external calibrating stop; in fig. 3 is a diagram of the winding of the tooth zone of the stator with internal calibrating stops made in the form of a groove; Fig, 4 - calibrating stop having a profile of the groove of the magnetic circuit; in fig. 5 - cylindrical gage stop.

A method of manufacturing a magnetic circuit of an electric machine is carried out as follows.

A strip of electrical steel is rolled between tapered rollers 1 and 2, rotating in bearings 3 and 4 with the same angular frequency of rotation and towards each other.

The angle between the two tapered rollers and the minimum distance A1 are chosen from the condition of obtaining the required preliminary radius of curvature of the coil R or R (Fig. 2). Bringing the preliminary radius of curvature R (R) to the nominal RH is carried out with the help of calibrating stops 5 of the external calibrating device 6 and the stops 7 of the internal calibrating device 8. The stops of the internal calibrating device 8 can have either a round shape 7 (FIG. 4) or a groove 9 The forces generated by the stop of the external calibrating device can be provided in various ways, for example, by means of a spring 10 and a pressure screw 11, or by using a single pressure screw 11. The outer surface of the tooth zone can be used Pipeline force from one stop 5 (Figure 2) or from several stops (FIG. 3). The use of several stops instead of one favorably affects the quality of the magnetic circuit.

When the number of calibrating stops of the external calibrating device is more than one, they may also have a common pressure device. In this case, the greatest load falls on the first stop (closest to the rolling axis), and subsequent stops have a smaller load, since the coil is already practically formed by the first stop. The stops 9 of the internal calibrating device 8 may be fixed

(Fig. 4) or movable (Fig. 5) relative to its base.

When the stops 7 are movable relative to their base, they can be inserted into

grooves pressure device 12 (Fig. 1). The spring 13 has a movable stop 7 in a raised position. In this case, the movable stop must occupy its working position (its groove) at the moment when

the continuous edge of the same groove will begin to leave the rolling zone of the rolls 0-0 (Fig. 2 and 3). If this condition is not met, the inner gauge stops will not perform their functions of turning continuous

edge of the coil relative to the axis 0-0 rolling rolls. The tooth zone 14, after passing the guide 15 and the rolling axis of the rolls 0-0, experiences a torque from them, and the teeth 16 through the stops 7 rotate

internal calibration device 8 relative to the fixed axis of the shaft 17 of the internal calibration device.

Shaft 17 is mounted in bearings 18. After passing through turns of an angle of 90-120 °

the tape is separated with a diverter (not shown) and wound into a bag in a known manner.

During the rotation of the internal calibrating device, the tape experiences an effort, sometimes considerable, which may

cause undulation of the continuous edge of the coil. In order to eliminate this phenomenon, the internal calibrating device is rotated by an additional device (electric motor) 19, informing

stops the circumferential speed equal to the speed of movement of the tape rolls.

As soon as the first tooth of the tooth zone passes the rolling zone of 0-0 and the continuous edge of the groove of the tooth zone 14 starts rolling, the first stop 7 is lowered into the groove and the force is transferred to the bottom of the groove. Then, the outer surface of the coil rests on the abutment 5. 8 due to the fact that the stops 5 and 7 are tuned to the nominal radius of curvature RH, the pre-rolled tooth zone with the radius of curvature R (R) acquires the radius of curvature RH. After the passage of the toothed zone 90-120 °, the dentate zone is removed from the stops,

Since the number of stops of the internal calibrating device is equal to the number of grooves and they are set apart from each other strictly by the magnitude of the slotted division, the inaccuracies in the step along the teeth caused by rolling are fixed by internal stops,

Claims (1)

Formula of & reteni A method of manufacturing an electric machine magnetic circuit, in which a tape of electrical steel with teeth is wound onto an edge by rolling between two conical rollers using internal and external calibrating stops, characterized in that, in order to improve the quality of the manufactured products by improving the accuracy of the magnetic core geometry and eliminating teeth deformations, effort from internal calibrating The lugs are transferred to the bottom of the grooves between the teeth, starting from the zone of contact of the rolled part of the belt with the rollers, and the inner lugs are forced to rotate relative to the axis of the magnetic circuit at a peripheral speed equal to the speed of the belt between the rolling rollers. FIG. 2 P eleven djue.j 9 eight Phage. five