SU753592A1 - Apparatus for syncronizing double-side feed drive for digital programme-controlled technological equipment - Google Patents

Description

one

The invention relates to mechanical engineering, in particular to machine tools, and is intended to synchronize 2 unrelated feed drives having independent connections to one common working body, for example, a wide worktable, portal, crosshead, etc.

Two-sided drive feed synchronization devices for CNC process equipment are known, comprising shafts associated with individual drives, on one of which a fixed element is installed, which interacts through a means of converting relative rotational motion into relative translational to an element mounted on the second shaft the possibility of translational (axial) movement and interacting with an electromagnetic sensor associated with the feed drive through an electrical circuit, including aklduyu electromagnetic relay ij.

Such a device has a complex structure, low accuracy and unreliable in operation.

The aim of the invention is to improve the accuracy, reliability and simplify the design of the device.

This goal is achieved by the fact that the means for converting relative rotational movement into relative translational movement is made in the form

5 of the threaded connection, and the electromagnetic sensor is powered by a generator and connected to the feed drive and in parallel to the electromagnetic relay via a phase sensitive rectifier. In order to increase reliability by eliminating the emergency condition of the drives on the shafts, shaft rotation stops interacting with each other are installed.

15 Fig, 1 shows a general view of the proposed device; in fig. 2, section A-A of FIG. 1 in FIG. 3 - device block scheme.

The device is made in the form of 2

20 coupling halves 1 and 2, rigidly mounted on shafts 3 and 4 and interconnected by sleeve 5, on which a disk b is provided for interaction with the electric circuit of the feed drive. On

25 facing ends of half couplings 1 and 2 (Fig. 1) for mechanically limiting the angle of their mutual reversal, interacting fuses interact in pairs

30 hard limit stops 7

(Fig. 1, 2), alternating with each other with an angular gap of about. The disk b on the tulk 5 is located between the poles of the electromagnetic sensor.8 and serves as the cortex of the sensor-. The sleeve 5 on the half coupling 1 is mounted with the possibility of: - axial movement along the guide pins 9 / a with the coupling half 2 is connected by a threaded connection M. The executive motors 10 and 11 (Fig. 3) of the feed drives with tachogenerators 12 and 13, which carry out feedback speed through gears 14 and 15 are associated with an electromagnetic sensor 8. and sensors 16, 17, providing feedback on the position.

The feed drives through thyristor converters 18 and 19 are connected to a numerical control system. 20. A voltage generator 21 is provided to power the sensor 8. The sensor 8 is connected via a phase-sensitive rectifier 22 to a thyristor converter 18 of the direct current of one of the feed drives and in parallel with a polarized relay 23.

The device works as follows.

If the drives operate synchronously, the coupling halves 1 and 2 rotate at the same speed and between the disk b and the poles of the sensor 8 are constant and equal gaps 5 (Fig. 1). The signals from the sensor 8 correction will be zero (o) (Fig. 3). If synchronization is violated, then coupling half 1 and 2 receive a mutual reversal one relative to the other, while coupling half 2 interacts with sleeve 5 through a thread and it is displaced along the keys 9 along the axis, thereby changing the gap 5 between the disk b and the poles of the sensor 8. On The output of the sensor is an alternating current voltage, the phase of which will depend on the disk 6 position. This voltage, rectified by the phase-sensitive rectifier 22, is fed to the input of the thyristor converter 18, where it is summed with the input signal of the systems control 20, whereby the motor will be produced and the speed correction 10 be provided synchronous operation of both drives, with the coupling halves 1 and 2 are returned to their original position relative to each other and between the disc and the used sensor poles 8 are recovered equal clearances S.

If the mutual rotation of half couplings 1 and 2 from the middle position is greatest, i.e. equal to the angle ob, which is selected in proportion to the permissible amount of working body skew, then the polarized relay 23 is triggered and the drives are disconnected in emergency, and the coupling halves close to hard stops limiters 7, thereby guaranteeing the feed drives from breakage, eliminating further distortion and jamming of the working body.

Claims (2)

1. A synchronous double feed drive synchronization device for CNC process equipment, containing associated with individual 0 drives shafts, on one of which there is a fixed element that interacts through a means of transforming relative rotational motion into relative translational. E with an element mounted on the second shaft with the possibility of translational movement (oceBoroJ displacement and interacting with an electromagnetic sensor connected with the feed drive through an electric A circuit comprising an electromagnetic relay, characterized in that, in order to increase accuracy, reliability and simplify the design of the device, no relative rotational movement in relative translational formed as a threaded joint, and the electromagnetic sensor and powered generator is connected to the actuator 0 feeds and in parallel - to an electromagnetic relay through a phase-sensitive rectifier. 2. The device according to claim 1, characterized in that, in order to increase reliability by eliminating the emergency condition of the drives, shaft rotation interlocking devices interconnected with each other are mounted on the shafts. Sources of information taken into account in the examination 1. USSR author's certificate No. 55. 554437, cl. F 16 D 23/02, 1977.