SU781033A1 - Apparatus for finishing of bodies of revolution by plastic deformation method - Google Patents

Description

one

The invention relates to metalworking, in particular to the finishing and hardening of the holes of parts with a ball cage. j

Tools are known that include a housing in the form of a body of revolution, equipped with an expansion chamber in the form of an inclined annular groove, the lateral surfaces of which are angled with respect to the tool axis. In an inclined annular groove freely placed balls driven by compressed air supplied into the annular groove through an axial hole made in the housing, and tangential channels-nozzles. Plastic deformation of the surface of the hole is carried out due to the centrifugal force developed by the moving balls. The constructive implementation of the expansion chamber in the form of an inclined annular groove allows the balls to move along an elliptical 25 path fl.

A disadvantage of the known tools is that they cannot provide the possibility of processing portions of holes of long length.,.

 The purpose of the invention is to increase the processing capacity by allowing the balls to move back and forth along a closed screw path by a large (on the order of several hundred millimeters) axial distance through the expansion chamber of the mold.

The goal is achieved t & l, that the body is made additional annular inclined grooves of the left and right directions, intersecting with each other and with the main annular groove.

FIG. 1 shows a tool, a general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 is a sweep of the trajectories of movement of the ball around the expansion chamber of the instrument; FIG. 5, view B in FIG. one.

The proposed tool for the finishing and strengthening treatment of the holes consists of an axial bore and a threaded shank of the housing 1, on the outer cylindrical surface of which there are two bushings 2, each of which is provided with one end to the axis

781033

tool angle d. different from 90. Between the sleeves 2 on the housing 1 are placed four sleeves 3, each of which is provided with two ends, inclined towards each other at an angle of 180-2d, and: to the tool axis - at an angle d,,

The sleeves 2 and 3 are fixedly mounted on the housing 1 with the pins 4 so that their inclined ends facing each other R-ffyry form a closed extension chamber 5. The width of the expansion chamber 5 in the area of the intersection of the collimatous axes of the ft to the OK wounds is not the width of these grooves. Thus, the expansion chamber 5 is a closed system of intersecting inclined grooves, the neighbor of the third-way names. The opposite inclination, in the expansion chamber 5, freely placed deformical balls 6. The Tangeiélle nr to the bases of the inclined grooves forming the expansion chamber 5, the nozzle channels are made 7, connecting the expansion chamber 5 with the axial opening of the housing 1. All the nozzle channels 7 are directed in one direction with respect to the tool axis.

The tool for rolling and the holes works as follows.

The xgoctOBHlKpM Icopnyca i threaded tool is installed in the tailstock of the lathe, machining the IG part; clamped in the chuck of the machine. The tool is coaxially inserted into the hole to be machined, and the part is rotated around the axis of the hole. At the same time, compressed air is supplied to the axial opening of the housing 1. Through the channels 7, the compressed air enters the expansion chamber 5, where it is set in motion; the ceforming balls b.

Ha p S3l & eptke the outer cylindrical surface of the sleeves 2 and 3 lines with 15 if HTHHif K & Ш p pyr Ш Shtai are sinusoids, and therefore, sections 1-X of the path of movement of the balls b on the surface being processed; Carry your cuts of sinusoids.

Beginning under the influence of compressed air movement along the expansion chamber 5, for example, from the fM trajectory section, the balls b at the intersection of the grooves are then transferred to section IV of the trajectory, since their velocity determined by the tangent to the sinusoidal trajectory near the intersection of the grooves causes them the transition is on the plot at the trajectory, and not on the plot, at the transition to which the balls b would have to change the direction of speed. Thus, the balls b are successively moved from one inclined annular groove to the other — the adjacent one, which has an opposite inclination. After the passage of sections 71 and V0 of the trajectory, the balls b start moving along the expansion chamber 5 in the opposite direction, again sequentially moving from one inclined annular groove to another.

Claims (1)

1. USSR author's certificate No. 559814, cl. B 24 B 39/02, 1973. r t FN1.1 Fig.} FIG. Type B