SU1220855A1 - Device for monitoring cutting tool wear - Google Patents

Description

The device relates to the processing of metals by cutting and can be used mainly for controlling and adjusting cutting tools when machining parts on special technological equipment (machining centers, CNC machines, aggregate machines, etc.).

The aim of the invention is to improve the accuracy of control by measuring directly the value of uniform wear of the cutting tool.

The drawing shows the device

general form.

The device consists of a housing 1 made in the form of a glass with lateral openings. In the inner cavity of the housing 1 there is a plunger 2, in which the light source 3, the photodiode 4 and three luminous, are rigidly fixed. yes 5. A carbide plate 6 is attached to the plunger 2, which is in contact with the measured cutting edge of the tool 7. Plunger 2

It is not springs 8, and its entrance is limited to 25, and the measurement is carried out. Wherein

A spacer ring 9 is provided. On the tool holder 10 there is a mirror surface 11, which serves to reflect the rays supplied from the light source through the central optical fiber. The plunger 2 and the tool holder 10 are embedded in the electric circuit 12 for controlling the moment of their contact.

the size of the gap L due to the size of the tool wear 7 will change, the intensity of the light flux in the side fibers will also change, 30 photodiode 4 produces a signal that is different from the previous one. From the magnitudes of the signal difference, one can judge the size of the size wear of the tool 7.

Compiled by V. Vlodavsky Editor N. Slobod nickname Tehred I. Veres. Proofreader L. Pilipenko

Order 1325/15

Circulation 1001

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, st. Project, 4

The device works as follows.

The housing 1 of the measuring head is guided to the tool holder 10 in the direction of the dimensional wear of the tool. When the carbide plate 6 of the plunger 2 contacts the electrical circuit 12, a signal is applied to the measurement. The light source 3 begins to work. The light from the source 3 is transmitted through the central light guide to the mirror surface and, being reflected from it, falls into the

side fibers, which are connected to the photodiode 4. The latter produces a certain signal, the magnitude of which can be used to judge the size of the gap t between the ends of the optical fibers 5 and the mirror surface 11.-

After the tool 7 has been machined with a certain number of parts, the housing of the measuring head 1 is brought back to the tool holder 10

The size of the gap L due to dimensional wear of the tool 7 will change, the intensity of the light flux in the side fibers will also change, and the photodiode 4 produces a signal different from the previous one. The magnitude of the difference signals can be judged on the size of the dimensional wear of the tool 7.

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Claims (1)

DEVICE FOR CONTROL OF WEAR OF A CUTTING TOOL installed in a tool holder, containing a measuring head with a housing and a light source connected through a system of optical fibers, and a controllable reflective area with a photodiode, characterized in that, in order to increase the accuracy of control, the measuring head is equipped with a plunger, spring-loaded relative to the housing and installed in it with the ability to move in the direction of wear of the cutting tool, and the light source, the system of optical fibers and a photodiode installed us on the plunger, kotog ing designed to cooperate with the cutting tool and provided with a control circuit the moment of contact, and controlled reflective pad formed on the toolholder.