SU1135571A1 - Deforming member for broaches - Google Patents

Abstract

A DEFORMING ELEMENT FOR STRIPS, comprising a case with guides and deforming inserts fixed on it, the last of which have each two side surfaces connected to the case, the front and rear conical surfaces separated by a cylindrical ribbon, and a supporting one, characterized in that in order to increase strength and durability, the guides and deforming inserts are placed in a shahmatny order, with the guides inserted in front of the deforming, while the outer surfaces of the constituents inserts and front surfaces of the inserts described general deforming cone generatrix, and deforming the insert are mounted so that their support surfaces are arranged to the axis of the deformation element at an angle p 6-10 °. SS LT 00 SP sd

Description

The invention relates to metalworking and can be used in the processing of holes with deforming pull.

Structures are known, in which deforming and guiding elements 1 are installed.

A disadvantage of the known constructions is that the guiding elements do not protect the deforming elements from destruction.

The purpose of the invention is to increase the strength and wear resistance of the deforming element.

This goal is achieved by the fact that in the construction of a deforming element for a sheath comprising a body with guides and deforming inserts fixed on it, the latter of which have each two side surfaces connected to the body, anterior and posterior conical surfaces separated by a cylindrical ribbon, and supporting, guiding and deforming inserts are placed in a checkerboard pattern, with the guiding inserts located in front of the deforming, with the outer surfaces of the guiding inserts and The red surfaces of the deforming inserts are described by a common forming cone, and the deforming inserts are installed so that their bearing surfaces are located to the axis of the deforming element at an angle of f 6-10 °.

FIG. 1 shows a deforming element, a general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. one.

The deforming element consists of a body 1, deforming inserts 2 of superhard material and guide inserts 3 located along the perimeter of the body in a staggered order, with the guide inserts 3 installed in front of the deformers 2. The outer surface of the deforming inserts 2 is made in the form of two truncated cones - front 4 and rear 5, separated by a cylindrical ribbon 6.

The guide inserts 3 are constructively cylindrical bodies, made mainly of superhard materials and fixed with an adhesive in the holes of a cylindrical shape, made in the housing 1 of the deforming element. The outer surface 7 of the guides 3 and the surface of the front cone 4 of the deforming inserts 2 are described by a common generatrix 8 located at an angle оС to the axis of the body 1 of the deforming element. The side edges 9 and 10 of the deforming inserts 2 are mated with the surfaces of the front 4 and rear 5 cones and with the cylindrical ribbon 6 between them along curved surfaces 11 and 12. The outer surfaces of 7 guides 3 are connected along the same curved surfaces 13 and 14 with their lateral cylindrical surface. The deforming inserts 2 are installed so that their bearing surfaces are located at an angle of 6-10 to the axis of the deforming element.

The deforming element works as follows.

When the deforming element enters the hole of the workpiece, the outer surface 7 of the guide inserts 3 first comes into contact with the surface to be processed, and then, as the deforming element moves into the hole of the workpiece, the surface of the front cone 4 enters into the hole of the workpiece. de forming inserts 2.

Due to the fact that the outer surface 7 of the guide inserts 3 and the surface of the front cone 4 of the deforming inserts 2 are described by a common forming 8, with

The inlet of the deforming inserts into the hole does not impact the end of the workpiece (the edges of the hole) on the working inserts, and the contact pressures on the peripheral parts of the inserts do not increase.

In addition, using the guide inserts 3, the workpiece is centered with respect to the surface of the front cone of the deforming inserts, as a result of which tension and load

for each deforming insert are aligned. The arrangement of the deforming 2 and guiding 3 inserts in staggered order preserves the most susceptible from the point of view of strength from impacts.

0 side edges 9 and 10 of the deforming inserts 2. In addition, this arrangement also improves the accuracy of the shape of the holes in the cross section of the holes to be machined.

A decrease in the load and a decrease in the contact pressure at the interface of the surfaces (surfaces 4, 5 and 6) of the inserts 2 with their side surfaces 9 and 10 are observed only if

0 surfaces are joined by curvilinear surfaces. All this increases the strength and durability of inserts. Execution of deforming inserts of superhard materials, the supporting surfaces of which are angled to the axis

5 of the deforming element J3 6-10 °, ensures their maximum strength and wear resistance.

/ 3 W.

12

Fkg.g

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Claims (1)

A STRAIGHT ELEMENT, comprising a housing with guides and deforming inserts fixed thereon, the latter of which have each two side surfaces mating with the housing, front and rear conical surfaces separated by a cylindrical ribbon, and a support, characterized in that, in order to increase strength and wear resistance, the guide and deforming inserts are staggered, and the guide inserts are located in front of the deforming ones, while the outer surfaces of the guides in rates and the front surfaces of the deforming inserts are described by the common generatrix of the cone, and the deforming inserts are installed so that their supporting surfaces are located to the axis of the deforming element at an angle p = 6-10 °. SU, 1135571