SU755530A1 - Combined tool for working openings - Google Patents

Description

The invention relates to the field of engineering and can be used for finishing machining cutting and plastic deformation of the holes of the workpiece type *

sleeves, sleeves and cylinders.

Known combined tools that contain rigidly interconnected with the help of the thread of the boring and rolling shells, consistently performing boring with a direct working stroke and rolling during the reverse working stroke of the tool. The boring body consists of a boring unit installed in 15

It has a double-blade boring plate. A separator with conical deforming rollers in contact with a support cone and a setting mechanism [1] are installed on the expansion housing.

A disadvantage of the known combined tool is the lack of ensuring sufficient reliability of the installation and fixation of deforming rollers in the separator, which can lead to their falling out in the idle position of the tool, as well as at the time of entry and exit from the hole being machined. Also tough 30

2

the connection of the conical sliding sleeve with the rod of the rolling block eliminates the possibility of self-installation of the rollers at the moment of their entry into the hole being machined, which leads to a distortion of the geometric shape of the machined hole. And, finally, the tool has a low productivity, due to the presence of two successively performed axial working movements of the tool (during the forward and reverse stroke).

The aim of the present invention is to improve the reliability of the combined tool.

This goal is achieved by the fact that the combined tool for machining holes is provided with a sleeve made in the form of a collet rigidly fixed on the separator and a ring with circumferentially face protrusions designed to interact with the petals of the collet and the bearing cone is installed with an axial clearance of 0.5- 2.5 mm relative to the roll and boring cases.

FIG. 1 shows a combined tool (longitudinal section A-A in FIG. 2); in fig. 2 - view of the combined instrument with front 755530

four

first butt; in fig. 3 is a section BB in FIG. 1 ·, in FIG. 4 shows a section B-B in FIG. five; in fig. 5 is an end view of the separator assembly; in fig. 6 - separator sleeve; in fig. 7 is a view of FIG. 6 ’, in FIG. 8 - section; d ~ d in fig. 7; in fig. 9 and 10 is a cross-section of a ring with face protrusions and a view of / K on the ring · "from the side; in Fig. 11 a section E-E in Fig. 12; in Fig. 12 a side view of the separator body.

The combined tool consists of a boring body 1, a rolling body 2, interconnected by a threaded connection. The boring body 1 is provided with an end section with an external thread entering the central hole of the rolling body 2. The boring body 1 is equipped with a groove of a rectangular profile in which a floating boring block 3. On the front side of the boring body 1, the groove is closed by a cover 4 attached by screws 5 to the boring body 1.

Between the boring body 1 and the rolling body 2 there is a support cone 6 mounted with diametrical and axial clearances on the machined cylindrical stage 7 of the boring body 1, and a sleeve 8 (FIG. 3) rigidly connected with the boring body 1 and interacting with the radial groove, made at the end of the support cone 6, fixing it from possible twisting.

The combined tool is equipped with a central axial line 9 with channels (not shown in the drawings) for the supply of coolant (coolant fluid) to the chip formation zone of the boring unit 3.

On the outer cylindrical surface of the boring body 1 there are made longitudinal grooves in which the guide bars 10 are installed (Fig. 2). On the cylindrical portion of the outer surface of the roll body 2 is installed. the separator 11. The housing 12 of the separator 11 (Fig. 4) is provided with longitudinal grooves for tapered deforming rollers 13. On the housing 12 of the separator 11 is fixed with screws 14 sleeve 15, made in the form of a collet and having blind longitudinal grooves for tapered the longitudinal grooves of the petals 16 of the sleeve 15 are pressed against the conical section of the outer surface of the housing 12 of the separator 11 with screws 17 and a ring 18 provided with circumferentially face protrusions cooperating with the petals 16 of the sleeve 15.

The ring 18 together with the sleeve 15 keeps from falling out the conical deforming rollers 13. The adjustment of the conical deforming rollers 13 to the working size is carried out with

using the working size adjustment mechanism 19 installed on the roll body 2.

The combined tool is rigidly fastened to the boring bar 20 of the metal-cutting machine with the help of the shank 21 of the roll body 2 provided with the threaded section.

Before starting work, a preliminary adjustment of the combined instrument is carried out; adjust the boring unit 3 to a predetermined size, and the conical deforming rollers 13 adjust to the preset tension using a working size setting mechanism 19. During operation, the boring bar 20 together with the combination tool installed in it is reported to axially move.

At the time of entry of the boring unit 3 into the machined hole of the workpiece, the coolant supply system is turned on and the process of boring the hole begins. From the moment of entry into the hole of the conical deforming rollers 13 begins the simultaneous processing of the hole of the workpiece by cutting and plastic deformation. In this case, the conical deforming rollers 13 and the supporting cone 6 cooperating with them self-aligning due to the presence of axial and diametrical gaps between the supporting cone 6 and the boring and longitudinal bodies 1 and 2.

After the end of the working stroke, the coolant supply system is shut off and the combination tool together with the boring bar 20 is reported. reverse motion. In this case, the separator 11 with conical deforming rollers 13 occupies the leftmost position, providing a "reset" of the working size of the conical deforming rollers 13..

Thus, the proposed combined tool ensures reliable installation and fixation of tapered deforming rollers in the separator at all stages of work movements, as well as in the inoperative position. In addition, there is the possibility of self-installation of tapered deforming rollers at the time of their entry into the hole being machined. The proposed scheme of the backlash-free threaded joint of the boring and roll-in corpuses provides a significant increase in the longitudinal rigidity of the combined tool during operation.

Claims (3)

Claim 1. Combined tool for machining holes, containing a boring body with a boring block, connected by means of a threaded connection with a roll body, into a co5 755530 6 A separator with conical deforming rollers in contact with a support cone located on the boring housing and a setting mechanism, characterized in that, in order to increase reliability, it is equipped with a sleeve made in the form of a collet fixed on the separator and a ring with circumferentially face protrusions designed for contact with the collet tabs. 2. Tool pop. 1, characterized in that the support cone is installed with an axial clearance 5 0.5-2.5 mm relative to the roll and boring cases.