SU1752528A1 - End knurl - Google Patents

Abstract

Use: metal forming, in particular, hardening surface treatment. The invention: the knurling contains a mandrel, a separator with conical deforming rollers, a support element, crackers. The supporting element is designed in the form of telescopically interconnected bushings with convex end surfaces. The bushings are mounted with the possibility of free relative axial movement. A spherical groove ring is installed on the mandrel to accommodate the crackers. Crackers are mounted on the support element with the possibility of angular rotation in the radial plane parallel to the forming sleeves of the support element. 1 il.

Description

The invention relates to metalworking and can be used in the processing of annular end surfaces of machine parts by plastic deformation.

A known tool for strengthening the machining of the end surfaces of machine parts.

The disadvantage of this tool is the presence of the point nature of the interaction of its deforming rollers with the supporting element.

Known end knurling, comprising a housing with a mandrel, carrying a separator with conical deforming rollers mounted to interact with a support element made in the form of telescopically interconnected with the possibility of axial movement of the sleeves with convex working ends facing deforming rollers. These threaded bushes, each provided with a means for fixing it in the working position. The specified tool provides rolling of the annular end surfaces of both flat and conical shape, with different geometrical parameters. To do this, it is necessary to re-tune the instrument to a reference part or a special pattern by changing the mutual axial movement of the threaded bushings that are telescopically interconnected. This reduces the manufacturability of the specified tool in operation. In addition, due to the presence of several bushings with internal and external threaded surfaces, it is desirable to consider the improvement of the manufacturability of such a tool in the manufacture

The purpose of the invention is to increase productivity by automating the process of changeover when changing the profile of the surface being treated, as well as improving manufacturability and simplifying operation.

The drawing shows the knurling, cut.

The tool includes a housing consisting of a mandrel 1 and secured to it with a key 2 ring 3, made

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with three spherical recesses uniformly located on its face surface at 120e to one another. The body mandrel 1 is connected to the shank 4 by means of a pin 5 and a spring 6. On the body mandrel 1 there is also a separator 7 with conical angular positions accommodated therein. deforming rollers 8 resting on a support element made in the form of smooth coaxially equal lengths of sleeves 9-13 with telescopically interconnected sleeves 9-13 with convex working ends, having the possibility of free mutual axial movement. The set of said sleeves is oriented relative to the mandrel 1 in the radial direction by means of an intermediate sleeve 14 fixedly mounted on the mandrel 1. The opposite (opposite working) ends of the telescopic sleeves 9-13 are also convex and interact with three supporting crackers 15 installed in spherical recesses of the ring 3 cases with the possibility of swinging in radial planes. On the side facing the telescopic sleeves, the supporting crackers 15 are provided with protrusions that fit into corresponding grooves made on the end portion of the sleeves, thereby ensuring the transmission of torque to the supporting element. The choice of the number of crackers (three) is determined both by the minimum number they need and by the condition of the obligatory interaction of each of them with the convex ends of the telescopic sleeves,

The tool works as follows.

Shank 4 is reported to rotate and axially move the workpiece 16 fixedly on the machine table. As a result, the deforming rollers 8, rotating with a certain force, roll the flat end surface of the workpiece 16,

In case of strengthening treatment of the end surface of another shape, for example, outer or inner conical, deforming ropiks 8, changing their angular position in the separator when interacting with the treated surface, cause the telescopic sleeves to change their mutual axial position, and

supporting crackers - in a new way self-aligning in the spherical depressions of the body due to swinging in radial planes, as a result of which the deforming rollers can roll in the end conical surface with the required taper value. It should be noted that any special reconfiguration of the tool is not required in this case, everything is done automatically, which, together with high technological logic in manufacturing (by simplifying the design), provides a significant increase in the manufacturability of the proposed tool in operation.

Claims (1)

Invention Formula Face knurling, comprising a housing with a mandrel carrying a separator with conical deforming rollers mounted to interact with supporting element, made in the form of telescopically interconnected with the possibility of axial movement of the sleeves with convex working ends facing the deforming rollers, is so that, in order to increase productivity by automating the process of changeover when changing the profile of the surface being processed, and increase manufacturability and simplify operation, it is provided with evenly spaced on the end surface of the support element crackers, mounted with the possibility of angular rotation in the radial planes passing through the longitudinal axis of symmetry of the crackers and parallel forming the sleeves of the support element, mounted on the mandrel ring, made with its the end surface facing the support element, spherical grooves for accommodating crackers, while the bushings of the support element are installed with the possibility of free axial displacement, and their ends facing the crackers are made convex. four 1514 one f / Ll 12