CZ278225B6 - Device for levelling tailstock barrel or tool ram of a machine tool - Google Patents

Abstract

The device serves for levelling tailstock (1) or the tool ram of a machine tool, particularly a horizontal boring and milling machine, extending from the headstock (14) by means of, for example, a displacement screw (11). In the front of the headstock (14), around the tailstock (1), there is a front yoke (2) connected across the hydraulic cylinder (6) by a cable suspension (4), belted across a pulley (5) on the upper part of the stand (13) and pulleys (15) in the foot (16) of the stand (13), with a rear yoke (3) arranged around the tailstock (1) in the back part of the headstock (14). Across a pressure valve (8) the hydraulic cylinder (6) is connected with a hydroelectric generator (7) with a regulatory circuit (9) and switch (12). The regulatory circuit (9) is arranged for regulation of pressure depending on the position of the potentiometer (10) arranged for detecting the position of the displacement screw (11).<IMAGE>

Description

The invention relates to a device for aligning the quill or the slide of a machine tool, in particular a horizontal boring and milling machine, extending from the headstock, for example by a feed screw.

BACKGROUND OF THE INVENTION

Until now, balancing devices have been used to eliminate the drop of the quill or ram when they are moved out of the headstock. Furthermore, compensation systems using hydrostatic bearing of machine frame parts are used to eliminate deformations from the quill extension. Both solutions are complex and costly. It is known and simpler solution according to MS. No. 183 256, using only one of the lifting forces acting under the quill in front of its housing. Due to the small distance of the lifting force from the headstock elasticity of the headstock, the force required to compensate the quill reaches a considerable size, which in particular affects the friction conditions in the quill guide.

SUMMARY OF THE INVENTION

The above-mentioned disadvantages are eliminated by the device according to the invention for aligning the quill or the slide of a machine tool, in particular a horizontal boring and milling machine, extending from the headstock by a sliding screw, which is arranged in the front part of the headstock. a cable suspension wrapped over the pulleys at the top of the stand and pulleys at the bottom of the stand, with a rear yoke arranged around the quill at the rear of the headstock. The hydraulic cylinder is connected to a hydraulic generator and a control circuit and a switch via a pressure valve. The control circuit is configured to control the pressure in dependence on the position of the potentiometer arranged to sense the position of the sliding screw.

^{6 The} advantage of the proposed solution is a substantial reduction in the force required to align the quill or ram and its independence from the headstock compliance.

Overview of the figure in the drawing

An exemplary embodiment of the device according to the invention is shown schematically in the drawing.

DETAILED DESCRIPTION OF THE INVENTION

A front yoke 2 is arranged in front of the headstock 14 of the horizontal boring and milling machine. The front yoke 2 is arranged around the quill 1. This is connected via a hydraulic cylinder 6 via a cable suspension 4 led through pulleys 5 on top of the stand 13 and a rear yoke 3 arranged around the quill 1 at the rear of the headstock 14. The hydraulic cylinder 6 is pressurized

The valve 8, controlled by the control circuit 9 and the switch 12 depending on the position of the potentiometer 10 for sensing the position of the feed screw 11, is connected to the pump 7.

On the quill 1 of the horizontal boring and milling machine, two solenoid forces of opposite direction, which form a balancing pair, act by means of yokes 2 connected to each other by a cable suspension 4 guided over the pulleys 5 inside the rack 13 and through the shelves 15 '. The forces are achieved by the action of the hydraulic cylinder 6 supplied by the hydraulic generator 7 in the front part of the cable suspension 4. A smooth increase in the lifting force in the alignment of the quill 1 is achieved by increasing the pressure in the hydraulic cylinder 6 by a pressure valve 8, which is controlled by the control circuit 9 depending on the position of the potentiometer 10 to sense the position of the feed screw 11. Increasing the pressure to increase the balancing effects The weight of the technological accessories clamped on the quill 1 is entered into the control circuit 9 by the position of the switch 12.

Designed equipment can be made with horizontal boring and sliding design.

especially for large quill or milling machines

Claims (1)

A device for aligning a quill or a slide of a machine tool, in particular a horizontal boring and milling machine, extending from a headstock, for example by a sliding screw, characterized in that a front yoke (2) is arranged around the quill (1) a roller (6) with a cable suspension (4), wrapped over rollers (5) at the top of the stand (13) and a roller (15) at the bottom (16) of the stand (13), with a rear yoke (3) arranged around the quill at the rear of the headstock (14), the hydraulic cylinder (6) being connected via a pressure valve (8) to the pump (7) and to the control circuit (9) and the switch (12), the control circuit (9) being configured to control pressure depending on the position of the potentiometer (10) arranged to sense the position of the sliding screw (11).