SU1038072A1 - Apparatus for turning non-rigid parts - Google Patents

Description

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The invention relates to a machine tool industry, namely to devices for turning non-rigid parts - bodies of rotation.

Devices for turning non-rigid parts are known, comprising an inductor and two facing chucks, one of which is axially displaceable 1,

The disadvantage of such devices is the low processing accuracy.

The purpose of the invention is to increase the precision treatment by eliminating the deformations caused by the relaxation of internal stresses. The goal is achieved by the fact that in the device the inductor is made in the form of a semiring, rigidly attached to the caliper and covers the part along the half of its circumference when the caliper moves backwards, and in close proximity to the semicircle of the inductor, on the axis there is a spring-loaded bimetallic element interacting with the lamp the generator through the chain: inductive sensors: amplifier-control unit tube generator. In this case, the bimetallic element is installed with the possibility of synchronous movement with support. FIG. 1 shows the proposed device for turning non-rigid parts, general view; in fig. 2 is a view A of FIG. one . / The device includes a workpiece 1, installed in two turning patrons 2 and 3 facing each other, one of which (G) is axially displaced to create a tensioning force. The machining is carried out by the cutter 4 installed in the tool holder (caliper 5, which has 45 transverse movements on screw 6 from the drive (gear 7, engine 8). The longitudinal movement of the caliper is driven from screw 9 through gear 10 and motor 11. 50 The control unit 12 contains three pairs of switches that control the movement of the caliper and the inductor 13 and two pairs of switches 14 and 15 serve respectively for breaking the power supply circuit of the motor 11 of the drive for moving the toolholder unit 5 and for carrying out amykani power chain

the motor 8 of the radial movement of the caliper on the screw 6. The microswitches 16 and 17 close the turn-on circuit of the inductor 13 and the turn-on circuit of the reversing motor 11 in the opposite direction.

The microswitch 18 is designed to stop the drive for moving the caliper 5 o The inductor 13 is fixed in the tool holder 5 by means of current-conducting plates 19.

The bimetallic element 20, spring-loaded by the elastic element 21, is connected to the axis 22 of the induction sensor 23 connected by a conductor through an amplifier 24 to the control unit 25 connected to the capacitance of the lamp generator 26 fed through the unit 27 to rectify the current from the three-phase network (and 280 V, /-.SO Hz ;. The device works as follows. When the installation is turned on, the workpiece 1 is clamped in the front 2. and rear 3 cartridges, is rotated in the direction indicated by the arrow. At the same time, the details are set to the tensile force Pp and it is processed by the cutter k, fixed in the tool holder (support) S, in the direction indicated by the arrow. When the part is finished machining with the tool holder (support JS closes the contacts of microswitches 14 and 15. Contact U breaks the power supply circuit of the tool holder movement drive 11 the screw 9 through the gearbox 10. The switching is carried out in the control unit (Fig. 1, position. The contact 15 closes the power supply circuit of the engine 8 of the radial movement of the caliper 5 on the screw 6 through the gearbox 7. In Performan radial movement of support 5 contact closure occurs microswitches 16 and 17. The contact 16 closes the circuit incorporating inductor 13 and the contact 17 closes the circuit incorporating the reversible motor 11 in the reverse direction. As a result of the inductor moving along the part 1, residual stresses are relieved. At the end of the operation, the contacts of the microswitch 18 are closed, opening the power supply circuit of the engine 11. The heating temperature of the workpiece by the inductor is equal to the temperature of the low

tempering of its material {for steel S, the heating temperature is 200 ° C), which is ensured by the fact that at the time the tool is removed from the workpiece, the bimetallic element 20 comes into contact with part 1. and heating, nepeMeuia axle 22 of sensor 23, the electrical signal is supplied to the amplifier, to the control unit 25 and from it to the lamp generator 2b, which is connected to

rectification unit 27 connected to a three-phase network. The uniform heating of the preform 1 is controlled by varying the frequency in the oscillating circuit due to the capacitance.

The use of the proposed device for turning non-rigid parts makes it possible to increase the accuracy of the machined part.

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FIG. 2

Claims (2)

1. DEVICE FOR TURNING OF NON-RIGID PARTS, containing an inductor and two turning chucks facing each other, one of which is mounted with the possibility of axial movement, characterized in that, in order to increase the precision machining by eliminating deformations caused by relaxation of internal stresses, the inductor made in the form of a half ring, rigidly attached to the caliper and covers the part in half of its circumference during reverse movement of the caliper, and in the immediate vicinity of the inductor half ring, an axle is fixed a rugged bimetallic element interacting with a tube generator through a chain: inductive sensor - amplifier - control unit for a tube generator. 2. The device according to p. ^ Characterized in that the bimetal element is installed with the possibility of synchronous movement with support. SU »1038072 1 1038072 2