SU1495003A1 - Arrangement for measuring the position of cutting edge of tool in n/c machines - Google Patents

Abstract

The invention relates to a machine tool industry and can be used to measure the position of the cutting edge of a tool in CNC machines, for example, lathes. The aim of the invention is to improve the positioning accuracy of the probe in the working position by providing a constant force to push the lever against the stop. The device contains a double-arm pivoting arm, on the shoulder 6 of which a measuring skip is mounted, and on the shoulder 7 a movable stop 9 is fixed. In the working position, the stop 9 is pressed against the rigid stop 10 by means of a spring rod 11, one end of which is fixed on the roller 12. driven turning lever. 1 hp f-ly, 4 ill.

Description

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31А950034

In the working position, the stop 9 is clamped, which is fixed on the roller 12, the roller c to the rigid stop 10 is connected by means of 12 to a drive for turning the lever-spring rod 11, one end of a bob. 1 h, para. f-ly. 4 SP „

The invention relates to a machine tool and can be used to measure the position of the cutting edge of a tool in a CNC machine, for example, turning

The purpose of the invention is to improve the positioning accuracy of the probe in the working position by providing a constant force to push the lever against the stop.

Fig. 1 shows a device for measuring the position of the cutting edge of the tool, a general view: Fig. 2 shows a section A-A in Fig. 1; on fig.Z - section bb in figure 2; on figa - section bb In figure 2.

A device for measuring the position of the cutting edge of the tool 1 comprises a bracket 2 mounted on the housing 3 of the spindle head. In the bracket 2, a spherical clutch 5 is mounted on the bearings 4, connecting two mutually perpendicular arms 6 and 7 of the pivoting lever. A measuring probe 8 is fixed on the shoulder 6, and a stop 9 is clamped on the shoulder 7, pressed against the rigid stop 10 by means of a curved elastic rod 11 of cylindrical cross section, one end of which is fixed in the area of the stop 9, and the other on the roller 12 mounted on bearings 13 in bracket 2. The gear 14 is also fixed on the roller 12, which is in engagement with the rail 15, which is made on the plunger 16 of the hydraulic cylinder 17 of two-way operation. A sealing cuff 18 is attached to the outer surface of the spherical coupling 5, fixed on the stationary part of the machine, the flap 19, which encloses the working area of the machine, where the clamping chuck 20 is located to secure the workpiece. - yes, respectively, the roller 12 and the spring rod 1K Hard stop 10, mounted on the bracket 2, SNBB) adjustable) with the nut 23.

The device works as follows.

To bring the probe 8 into the operating position shown in Fig. 1 by a solid line, pressure is applied to one of the cavities (in this example, the lower one in Figs. 2 and 3), causing the plunger 16 to move (Fig. 2). and 3 - up), rotates the gear 14, and with it the roller 12 and the spring rod 11, which through the shoulder 7 rotates the entire two shoulders lever, including the clutch 5 and the shoulder 6 (in figures 1 and 4 - clockwise). The spring rod 11 is fixed so that when the movable stop 9, the hard stop 10 is touched, the plunger 16 continues moving for a while up to the stop into the flange of the hydraulic cylinder 17, deforming, otherwise speaking, the rod 11 is at a predetermined amount of force required to press the stop 9 to stop 10

When the plunger 16 reaches the extreme position (in Figures 2 and 3 - upper-Negro), the force of pressing the stop 9, and, consequently, the entire lever, is determined only by the specified tension of the configured spring rod and does not depend on other factors, such as the change or pulsation of pressure in the hydraulic cylinder 17 o Since the characteristic of the mechanical spring, in this case the spring rod 11 with the same value of its deformation, is stable, only slightly changing over a long period of time due to aging, then the magnitude of the pressing force of the support 9 against the support 10 remains stable, which achieves a high accuracy I repeatability) for positioning the probe

8 in working position. I

To retract the probe from the treatment area, pressure is applied to the opposite cavity (in Figs 2 and 3 — upper) of the cylinder 17 and the plunger 16 as it moves through the rail 15 and mecTepino 14 rotates the figure .1

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Claims (2)

Claim 1. A device for measuring the position of the cutting edge of the tool in CNC machines, comprising a bracket and a pivot arm with a measuring probe, a hydraulic drive for turning the bar and rigid stops for orienting the working position of the probe, characterized in that, in order to increase the accuracy of positioning the probe, the pivot arm is made two shoulders, on the second shoulder of which and on the bracket there are additional stops with 10 interoperability when the lever is turned to the working position, and the output link of the drive is equipped with an elastic rod a rigidly connected to the emphasis of the second shoulder of the arm 15 2c The device according to p. ^ Characterized in that, in order to seal the working area of the machine, the device is equipped with a spherical sleeve that connects the arms of the pivot arm, the center of the spherical sleeve is located on the axis of rotation of the lever, the sleeve is mounted in a bracket with the possibility of rotation moreover, mutually perpendicular openings for the drive and the elastic rod are made in the coupling. Fie 2 5-5 Fie.