SU1359082A1 - Broach having inserted cutting edges - Google Patents

Description

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The invention relates to metalworking and can be used in pulling holes.

The purpose of the invention is to increase the accuracy and manufacturability of the fabrication of a draw.

Figure 1 shows the assembled drawing, general view; 2 is a section A-A in FIG. one ; in fig. 3. - cutting element, general view; figure 4 - view B in fig.Z; Fig. 5 shows an embodiment of the cutting element; figure 6 is a view In figure 5.

The assembly path consists of a body 1, made in the form of a quadrangular prism, on which cutting elements 2 are placed. They are mounted with nuts 3 and A. At one of the ends of the cutting element 2 to exclude the contour of its unpolished inner surface with the body I is made deaf bore 5. In this case, the diameter of the blind bore 5 exceeds the diameter of the circle, which can be described around the cross section 6 of the housing 1. On the body 6 it is advisable to chamfer 7, reducing

590822

stress concentration. At the opposite end of the cutting element 2, there is a square hole formed by the intersection of four orthogonal through-slotted slots 8 parallel to the edges of a regular rectangular prism. The grooves 8 allow for the possibility of grinding the flat landing edge 9 in parallel. The depth of the grooves 8 is selected from the conditions for ensuring a sufficient contact area of the cutting element with the housing 1, which ensures that the specific surface stresses correspond to the strength characteristics of the metal. On the landing surfaces 9, segmental bores 10 can be made, improving the basing.

The tool works as follows.

The tool is inserted with the shank 11 25 into the inner hole of the workpiece (not shown) and a force P is applied in the direction of the longitudinal axis of the tool.

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Compiled by I.Lihopoy Editor M.Tovtin Tehred M.Hodanich Proofreader G. Reshetnik

Order 6104/15 Circulation 970 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113935, Moscow, Zh-35, Raushsk nab., 4/5

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Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

ASSEMBLY DRAWING, including cutting elements rigidly fixed to the housing, characterized in that, in order to increase the accuracy and manufacturability of the broach, the housing is made in the form of a prism, a blind bore is made at one of the ends of each cutting element with a diameter exceeding the diameter of the circle that describes with respect to the cross section of the body, and at the opposite end of each cutting element, rectangular rectangular grooves are made parallel to the faces of the prism, the intersection of which forms a hole s. FIG. t 1359082 A1