SU1399025A1 - Broach - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to the processing of summer. By the method of grotting. A division of the invention is to increase tool life and iroiz (1LNT1.m1 nostn) due to the implementation in the shear deformation zone with tension. circumferentially in increments equal to ujary of the protrusions of the slip-on deforming element 2. The plates are fixed with the possibility of contact on large bases with the casing of the draw, and on the men - with each other, and the bisector of the angle of each wedge ASTINA coincides with the axis of symmetry Plics deformiruyup1ego element. 3 yl.

Description

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The invention relates to mechanical engineering, in particular to the machining of parts by the method of drawing, and can be used for machining holes.

The purpose of the invention is to increase the durability and productivity of labor through the implementation of a shear deformation with tension in the focus.

FIG. 1 shows the draw; in fig. 2 is a stock removal scheme; in fig. 3 - installation diagram of cutting elements.

The stitch comprises a housing 1 with a spline deforming element 2 fixed on it, equipped with plug-in deforming plates 3, rough cutting elements 4 made in the form of wedge protrusions, for example, many-sided non-retracable plates, and finishing cutting elements 5 Multifaceted non-refillable plates are installed.

which begin to cut each protrusion from two sides simultaneously, with respect to the diameter of the grooves formed. The entry into work of the cutting edges of the plates occurs gradually, almost without shock. The shear planes from the impact of two opposite cutting edges, along which chip formation occurs, merge and exert mutual influence on each other, which facilitates the cutting process.

10 When the metal of the protrusion moves along the axis of the broach, it is compressed by the opposite rear surfaces of the cutting plates, as a result of which the metal begins to flow in the radial direction and in the deformation zone during cutting a shear with thrust occurs. This stress state can significantly reduce the energy intensity of the chip formation process as compared with the shear under compression, which increases the resistance of the cutting elements.

along the perimeter with a pitch equal to the pitch of the protrusion of the rotor and 20, and increase the amount of the toothed anti-tensioning element per tooth. Almost the size of the allowance

With this method of processing, only the permissible depth of groove extension is limited. The entire roughing allowance can be removed by one or two deforming by the possibility of contact on large bases with the case of the broach, and on smaller bases - with each other, and the bisector of the angle of the cutting plate coincides with the axis of symmetry of the spline protrusion. In this case, the opposite edges of adjacent plates form a solid cutting edge in the form of a reverse wedge. Between the cutting edges can be made openings for chip removal through the axial channel of the broach, in addition, the cutting plates can be installed in an orderly manner, i.e. each second plate is axially displaced by a certain distance so as to fit them more reliably to each other, in which case the best result can be obtained using rectangular and rhombic plates. As protrusions of the spline deforming element also carbide non-reversible plates can be used. Processing is carried out as follows. The part 6 is mounted on the support 7 of the extended machine. The splined deforming element is first pushed, forming alternating grooves and protrusions on the part surface. Then, draft cutting elements, made in the form of multifaceted non-reversible plates, come into operation.

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sections, which significantly reduces the length of the tool and increases productivity. Due to the straightness of the cutting edges of the wafer plates after the rough processing stage, the hole is faceted, however, the resulting wedge grooves are used for chip separation and further hole machining with finishing cutting elements that form the specified hole profile with the required accuracy.

Claims (1)

Invention Formula The spline, in the case of which, in alternate order, are spline deforming and cutting elements, which is different in that, in order to increase durability and productivity, the cutting elements are made in the form of wedge projections interconnected and located along the perimeter of the spacing with a radius equal to the pitch of the slots of the deforming element, with the bisector of the angle of each wedge protrusion aligned with the axis of symmetry of the slot of the deforming element. which begin to cut each protrusion from two sides simultaneously, with respect to the diameter of the grooves formed. The entry into work of the cutting edges of the plates occurs gradually, almost without shock. The shear planes from the impact of two opposite cutting edges, along which chip formation occurs, merge and exert mutual influence on each other, which facilitates the cutting process. When the metal of the protrusion moves along the axis of the broadening, it is compressed by the opposite back surfaces of the cutting plates, as a result of which the metal begins to flow in the radial direction and in the deformation zone during cutting there is a shift with stretching. This stress state can significantly reduce the energy intensity of the chip formation process as compared with the shear under compression, which increases the resistance of the cutting elements. With this method of processing, only the permissible depth of groove extension is limited. The entire rough stock can be removed by one or two deforming pe5 0 five 0 five sections, which significantly reduces the length of the tool and increases productivity. Due to the straightness of the cutting edges of the wafer plates after the rough processing stage, the hole is faceted, however, the resulting wedge grooves are used for chip separation and further hole machining with finishing cutting elements that form the specified hole profile with the required accuracy. Invention Formula The spline, in the case of which, in alternate order, are spline deforming and cutting elements, which is different in that, in order to increase durability and productivity, the cutting elements are made in the form of wedge projections interconnected and located along the perimeter of the spacing with a radius equal to the pitch of the slots of the deforming element, with the bisector of the angle of each wedge protrusion aligned with the axis of symmetry of the slot of the deforming element. phi.2 V phage. five