SU1377674A1 - Device for controlling wear of a cutting tool - Google Patents

Abstract

This invention relates to metalworking when measuring wear of a cutting tool. The purpose of the invention is to improve the measurement accuracy. by replacing the diffuse reflected light from the chamfer wear on the contact method. The device comprises a position sensor and a wear sensor. The sensorless sensor interacts with the base surface of the instrument, provides accurate positioning. The wear wear pin sensor consists of a source of light 15, a receiving-transmitting optical waveguide 10, 11, a cantilever mounted flat spring 13 with a measuring surface, a mirror 14 and a photodiode. The deflection of the spring 13, depending on the wear of the tool, makes it possible to register a change in the luminous flux in the optical system and to improve the accuracy of determining the wear of the cutting tool. 3 il. (L

Description

with

four;:

The invention relates to metalworking and can be used to measure the wear of a cutter on CNC machines and a programmable work cycle.

The aim of the invention is to improve the measurement accuracy by replacing the scattering reflected light from the wear chamfer with a contact measurement method.

1 shows a device, a section in FIG. 2 - the same, side view; on. 3 - measuring instrument, side view.

The device contains a housing (not shown), on the base 1, the right 2 and left 3 walls are installed with lids 4 and 5 attached at the top and bottom. The bracket 6 connected by an adjusting screw 7 and a fixing screw 8 to the wall 3 represents a cor beating mechanism moving and installing a wear sensor that has a photodiode U, receiving and receiving lights 10 and 11, measuring carbide plate 12 on a flat console mounted on bracket 6 spring 13 and mirror 14. Spring 13 is connected to the free end with light guide 10 and 11, second ends to They are connected to the light supply source 10 with the light source 15, and for the receiving light guides 11 with the photodiode 9, the mirror 14 is rigidly mounted on the wall 2. The position sensor has a power light guide 16 fixed by the end face to the wall 3 and connected to the light source 15 The received light guide 17, fixed on the wall 2, and the photodiode 18, connected to the light guide 17, the Photodiode 9 and 18, and the source 15 of the light are placed in the housing and fixed on it. The cutting tool 19, having a base surface 20 in the form of a step, is placed between the feed 16 and receiving 17 optical fibers of the position sensor during measurement during installation.

The device works as follows.

The tool 19 moves through the program to the device installed at the measuring position of the machine. When a step overlaps with a step, the light beam from the transmitting light guide 16 to the receiving 17 is interrupted, and a stop command is generated by the photodiode 18

e

five

0 5. 0 0 s

0

19. The tool 19 is in a strictly defined position, the tool 19 with its tip moves the measuring plate 12, while the spring 13 bends, and the light beam from the source 15 of light passing through the light guide 10 is reflected from the mirror 14, enters the 1 st optical fibers 1 1 and passes to the photodiode 9, which gives a certain value of the signal. The magnitude of the photodiode 9 signal during the first measurement of a sharpened instrument is the reference, against which the tool wear indicator 19 is measured.

After a predetermined processing time on the machine, tool 19 is brought back to the measuring device by a command and the measurement is again performed. Depending on the wear of the tool 19, the deflection of the spring 13 and, consequently, the intensity of the luminous flux in the receiving lights 11 changes, which the photodiode 9 registers. From the difference of the reference and repeated signals, the amount of wear of the tool 19 is determined.

Since the distance between the top tool 19 and the Step is not constant and changes after subsequent sharpening of the tool 19, the device is provided for tweaking. To do this, loosen the screw 8, move the bracket 6 along the wall 3 with the screw 7 to the required value, and again fix the bracket 6 with the screw 8.

Claims (1)

Invention Formula A device for monitoring wear of a cutting tool, a device comprising a housing, a movement and installation mechanism accommodated therein, a position sensor and a wear sensor made in the form of a source and receiver of light radiation, flat springs attached to the housing, associated with them measuring head, connected with it and a source of light radiation of optical fibers, and reflective. the surface is different from the fact that, in order to increase the measurement accuracy, it is equipped with a contact plate mounted on the spring, and the reflective surface is made in the form of a mirror mounted on the housing. AT 8 YU 1 In id J FIG. 2