SU1135635A1 - Method for restoring cutting capacity of composite multiple-row generation tool - Google Patents

Abstract

A METHOD OF RESTORING THE CUTTING CAPACITY OF A COMPOSITE MULTIPLE CUTTING CUTTING CUTTER, including disassembling it into single cutters, subsequent grinding of the working surfaces of the teeth and assembling into a multi-cutter, which differs in that, in order to improve the performance of the teeth, the tooth brushes the toothbrush. one-sided cutters are assembled into a technological multi-cutter cutter; what is done by grinding the surfaces of adjacent teeth of the same name, then disassembling the technological multi-cutting tool and subsequent assembly into the multi-cutting tool, and the rotation angle of one row relative to the other is determined by the dependence V.6..z, .-, iWQ where Q - the rotation angle of one row and relative to another; Od - the central angle in the face plane between adjacent teeth of different single-cutter incisors ;. the distance along the axis of rotation of the multi-incisor between the axes of adjacent teeth of different incisors on the initial circle; the initial radius of the tool; (ig - the angle of the teeth on the initial circle.

Description

The invention relates to mechanical engineering technology, in particular, to methods for producing and restoring the blunt teeth of multi-wheel grinding tools operating according to the toothing method. A known method of restoring the cutting ability of a composite multi-wheel crushing cutter, including its disassembly into single cutters, the subsequent grinding of the working surfaces of the cutters and assembly into the multi-cutter ij. The disadvantages of this method are low productivity and considerable labor intensity due to the need for sequential grinding of the teeth of each one. incisors, first along the posterior ones, then along the front surfaces, with careful control of the predetermined change over the tips of the teeth of each incisors. In addition, the known method ensures the achievement of the required accuracy of the relative position of the teeth of different rows in the multi-cutter assembled for operation. The purpose of the invention is to increase the productivity and accuracy of the relative position of the teeth of different rows. This goal is achieved by the fact that according to the method of restoring the cutting ability of the multidate grinding wheel, including disassembling it into single cutters, subsequent grinding of the workers is nor. tooth surfaces and assembly into a multi-teeth cutter, after disassembling, single-face cutters are assembled into a technological multi-cutter, aligning in one plane before the adjacent teeth of different cutters by turning one single-face cutter relative to the next, and jointly grinding one nominal working tool surfaces adjacent rows and disassembly of the technological cutter and the subsequent assembly in a multi-row cutter, with the angle of rotation determined by the ratio ,,., g. (j is the rotation angle of one row relative to the other; OQ is the central angle in the face plane between adjacent teeth of different single cutters; 7 is the distance along the axis of rotation of the multi-cutter between the axes of adjacent teeth of different cutters on the initial circle; about the initial cutter radius; Q is the angle of inclination of the teeth on the initial circle. In Fig. 2 shows a composite double-cut breaker assembled for operation; Fig. 2 is view A in Fig. 3; cutter assembled for grinding (process breaker cutter; figure 4 - view In fig.Z; figure 5 - radial cross-section of the nakatnik and two-profile grinding wheel for grinding the teeth of the cutter on the rear surfaces. The multi-grinding wheel cutter is manufactured as follows: The composite multi-wheel cutter is disassembled into single-sided cutters. Then, the inserted teeth 3 and 4 are removed. ha ... t from the body and clamped in the same way as it is done in the known method This is achieved by turning the cutter 1 around the axis at an angle Q (Fig. 4), which is technically possible to accomplish in various ways, for example by means of an end lock. Thus assembled multibore chisel is set-. in a special tool on a grinding machine, where their teeth are polished on the working surfaces. The teeth are then ground on the rear surfaces with a dowel, the profile of which is formed by a special multi-profile nagnik, (figure 5). The position of the reference point of the coordinates of the profile of the teeth of the incisor G (rotated by an angle y) is determined by the formulas Xo, "% sCO3 ij, -Smoi, 5i Vo, Z5-einfio,

3

where Xoi 01 is the point

Oh, the origin of the coordinates of the tooth profile of the cutter 1, oi g - the back angle at

the top of the cutter.

Grinding the teeth on the front surfaces is also carried out simultaneously for the adjacent teeth 3; and 4 technological tools (Figures 3 and 4),

After the grinding of the working surfaces of the technological

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The multi-tool is disassembled and the multi-tool is ready for operation. At the same time, the one-sided cutter 1 is turned relative to the cutter 2 by an angle j) in the opposite direction during assembly before grinding.

The economic effect of the use of the invention in industry is due to the improved performance of the recovery.

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Claims (1)

METHOD FOR RESTORING THE CUTTING CAPABILITY OF A COMPOSITE MULTI-ROW ROLLING CUTTER, including disassembling it into single-row cutters, subsequent grinding of the working surfaces of the teeth and assembly into a multi-row cutter, characterized in that, in order to increase the productivity and accuracy of the position of the teeth in the cutter, after cutting, one technological multi-row cutter, combine in one plane the front surfaces of adjacent teeth of single-row cutters due to the rotation of one row relative to the other, after which oestriasis grinding of similar surfaces of adjacent teeth, the disassembly process is then carried out and the subsequent multi-row cutter assembly in the multi-row cutter, wherein one row relative to the other rotation angle is determined depending on where φ - turning angle of one row relative to the other; 8 ₀ - the Central angle in the end plane between adjacent teeth of different single-row incisors; Zg is the distance along the axis of rotation of the multi-row cutter between the axes of adjacent teeth of different cutters on the initial circumference; * \ ν ₀ is the initial radius of the cutter; - the angle of inclination of the teeth on the initial circumference. Figure 1