SU1602630A1 - Composite tool - Google Patents

Abstract

The invention relates to metal cutting. The purpose of the invention is to increase productivity by simplifying the tool size setting. The device comprises cutting elements 4 installed with the possibility of radial movement from the action of a cone. The cone is made on the rod 22. The deforming elements 11 are mounted with the possibility of radial movement by means of a cone 13 located on the mandrel. The adjustment mechanism is made in the form of a nut 20, in which concentric threaded holes are made, designed to interact with the thread on the mandrel and the stem, made on the side opposite to the cone. The thread pitch on the rod determined from the dependence of T ₁ = ^T. TGβ: TGα + T, where T ₁ is the thread pitch on the rod

T - thread pitch on mandrel

α is the angle of the cone on the rod, β is the angle of the cone on the mandrel. During rotation of the nut 20, the cutting 4 and the deforming 11 elements move in the radial direction by the same amount. 1 il.

Description

The invention relates to the processing of metals by cutting.

The aim of the invention is to increase productivity by simplifying the tool size.

The drawing shows a combined tool for processing holes, a longitudinal section.

In the grooves of the mandrel 1, the cutting elements (cutters) with brazed carbide inserts are fastened with the cover 4. The cover 2 is pressed by a spring 5 installed in the casing bi fixed screw 7 and washer 8. On the cylindrical surface of the mandrel 1 sleeve 9 is freely mounted. In the outer An annular recess of the sleeve 9 has a chip ring 10 made of elastic antifriction material. The deforming elements are made in the form of tapered rollers 11 installed in the separator 12 on the support cone 13, and is protected from falling out by a cover 14 attached by screws 15 to the separator 12. The support cone 13 is mounted on the mandrel 1 with a key 16 and a nut 17. Spring 18 is mounted on the mandrel 1 and presses the cage 12 against the thrust bearing 19. The tool is equipped with a control mechanism made in the form of a nut 20 with concentric threaded holes designed to interact with the threads on the mandrel and rod, lock nuts 21, A rod 22 is installed in the hole of the sampling 1, at one end of which a cone is made that interacts with the cutting elements 3, and at the other end there is a thread for adjusting nuts 20 and 21, while the angle of the cone on the rod and the angle of the support cone of the rolling part, and also thread pitch on. the mandrel • and the thread pitch on the stem are selected so that during adjustment a simultaneous and coordinated change in the size of the boring and • rolling parts is ensured. The rod 22 is fixed in the mandrel from the rotation due to ι due to the flats made on it behind the cone and placed in the groove of the mandrel 1.

Combined tool for processing holes works as follows.

Before starting work, using the nuts 20 and 21, the cutting elements set the size D (and the deforming elements set the size D ^, which is larger than the size D ₄ by the allowance a .. under rolling. ·

During rotation of the workpiece and the translational movement of the mandrel 1 with the stem 22 to the left, the boring cutters 3 with carbide inserts 4 fixed in the grooves of the mandrel by the cover 2 produce a boring of the machined hole with a diameter of D ^.

Tapered rollers 11 installed in the separator 12 on the support cone 13 with the help of the cover 14, fixed with screws 15, roll the holes bored with cutters 3 with a diameter of Dq.

The support cone 13 is fixed stationary on the mandrel 1 by means of a key 16 and a nut 17. During processing, the separator 12 rotates and abuts against the support bearing 19. With the tool running to the left, the cutting fluid is supplied under pressure along a central and inclined the channels in the rod 22 and the inclined channels of the mandrel 1 to both the boring and rolling parts of the tool. The chips generated during the operation of boring cutters 3 are moved forward due to the geometry of the carbide inserts 4 and the plentiful supply of coolant under pressure into the cutting zone. Chip under the tapered ’rollers 1 1 is protected from the chip ring 10 mounted on the sleeve 9 and made of antifriction material.

When the tool is removed from the machined hole to the right, the conical rollers 11 are shifted from the support cone 13 together with the separator 12 and the cover 14.

After the tool is removed from the hole being machined, the rollers 11 together with the separator 12 and the cover 14 under the action of the spring 18 occupy the previous position, on the support cone 13, necessary for rolling the hole, ι

In the event that after processing the specified size and height of the micro-nerves of the treated surface are not achieved, the tool is adjusted. To do this, unscrew the lock nut. 21 and with the help of nut 20, change the processing size by the required amount, and by what size .1602630 changes the size Dj of the boring part, the size of the rolling part changes by the same amount, while maintaining the difference between them, by the size of the allowance for rolling.

Claims (1)

Claim A combined tool containing cutting elements mounted for radial movement by means of a cone made on a rod, deforming elements mounted for radial movement by means of a cone made on a mandrel, while the thread is made on the rod and mandrel from the side opposite to the cone, and a control mechanism, characterized in that, in order to increase productivity by simplifying the adjustment of the tool to size, the control mechanism is made in the form of nuts ki with concentric threaded holes designed to interact with the threads on the mandrel and rod, with the thread pitch where tf is the thread pitch on the rod; t is the thread pitch on the mandrel; ~ o <. - the angle of the cone on the stock. - the angle of the cone on the mandrel;