SU1284722A1 - Boring mandrel - Google Patents

Abstract

The invention relates to the field of machine tools and can be used in the bore of deep holes. The invention solves the problem of complete compensation of the cutter {and the wear of the cutter during the cutting process, which improves machining accuracy. During operation, finger 5, when reducing the diameter of the bore hole, caused by wear of the tool, comes into contact with the machined surface. Tightly connected to the finger 5, the sleeve 4 rotates. on the mandrel, and eccentric relative to the axis of the mandrel, the surface moves the cutter 2 in the radial direction; , carried out its adjustment. 2 Il.

Description

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The invention relates to a machine tool industry and may find use in the bore of deep holes.

The purpose of the invention is to improve the machining accuracy by ensuring full compensation of the wear of the tool by its movement in the radial direction.

On - fig. Figure 1 shows a boring bar, a longitudinal section; in fig. 2, section A-A in FIG. one.

The boring mandrel comprises a body 1, a cutter 2 mounted with the possibility of radial movement, and a device for compensating the wear of the tool during the cutting process, made in the form of an axially mounted axial movement on the mandrel, spring-loaded relative to the body in the axial direction by means of a sleeve 4 mounted on the mandrel can be rotated, and the element intended to interact with the machined surface rigidly connected with the hub 4 of the finger 5. The finger 5 has the ability to adjust Vtoop: e 4. The cutter 2 is installed in the radial groove of the sleeve 4 with the possibility of radial movement during the operation of the mandrel. On a mandrel with an eccentricity e from the BHHOjmen axle and a cylinder 6, designed to interact with the cutter 2, the spring force is 3 equal to the cutting force. A rubber sleeve 7 is attached to the sleeve 4 to prevent the mandrel from getting chips during processing. Details 8. The cutter 2 is fixed in the sleeve by means of springs 9, so that it is possible to adjust the clamping force. The installation of the finger 5 should be provided for its lag from the cutter in the axial plane by the amount, in ,.

Boring bar works as follows.

When the bore is bored, the cutter 2 is worn, resulting in a reduced bore diameter. Rigidly mounted in the sleeve

4, with the aid of a screw 10, the pin 5, which is fitted in one size with the cutter, is wedged in the reduced hole. The sleeve 4, overcoming the force of the spring 3, rotates about the axis of the mandrel, and the cutter 2 moves radially from the cylindrical section 6, filled with eccentricity e relative to the axis of the mandrel,

The treatment is carried out until the complete sampling of the subsetting stock is taken, after which the treatment is stopped for a tool change.

The invention allows to increase the accuracy of the surfaces machined during the boring.

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Claims (1)

Invention Formula thirty A boring mandrel, comprising a housing, mounted with the possibility of radial movement of the cutter, and a device for clamping wear of the cutting tool into the cutting process e, made in a vvde mounted on the mandrel with the possibility of; The axial movement of the sleeve and the element designed to interact with the machined surface, characterized in that, in order to improve the machining accuracy, the sleeve is mounted on the mandrel rotatably and springed relative to the body in the axial direction with a treated surface, made in the form of rigid connected to the bushing finger, and on the op; Rack, eccentricity relative | But its axis is cylindrical Sho juice designed to interact with the cutter.