SU1313588A2 - Method of arranging the cutting elements of multipoint tool for machining the surface with the given microrelief - Google Patents

Abstract

The invention relates to metal working. The purpose of the invention is to increase tool life and machining performance. Blades of cutting elements that form protrusions are set above the blades that form depressions at the same diameter with them, and the number of these blades is chosen equal to the number of projections and the number of depressions of the microrelief for the reverse feed of the cutter. On one diameter with the specified cutting elements have additional cutting elements, the blades of which are placed above the blades of the cutting elements, processing protrusions. 4 il. with & 0 0 SL OO OO.

Description

The invention relates to metal working and is an improvement of the invention according to the author. No. 1217591,

The purpose of the Invention is to increase tool life and machining performance by installing additional cutting elements that cut the main stock.

FIG. 1 shows a given micro relief; in fig. 2 - node I in figure 1; in fig. 3 - face mill; in fig. 4 shows section A-A in FIG. 3

The specified microrelief is an alternation of protrusions 1 and depressions 2 and 3.

Prior to the location of the blades of the cutting elements, for example, in the face mill, the feed per revolution () value is calculated, from which machining is carried out, Dp this sets the length of the periodically repeated shortest section of the planned microrelief. To obtain a given microrelief, it is necessary that the value of the relative movement of the workpiece and the end mill during one revolution is a multiple of the length of section E. In this case, the feed per revolution value is equal to the value.

By selecting the feed per revolution, the number of blades of the cutting elements forming the microrelief is determined.

The number of blades of the relieving elements 4–9, forming depressions 2 and 3, and the number of blades of the cutting elements 10–15 forming the protrusions 1, are equal respectively to the number of depressions and protrusions of the microrelief formed during one revolution of the cutter with the received feed per revolution

(SOB) The shape and size of the cutting blades

the elements forming the depressions are chosen the same as the shape and size of the corresponding depressions.

The shape and dimensions of the blades of the cutting elements forming the protrusions are chosen such that at the planned depth of the irregularities h, the supporting surface of the projections can be achieved with feed per tooth (S) exceeding the planned width b of the supporting surface of the projection.

Blades of cutting elements forming protrusions and depressions of micror {glier

F, set on a circle at the same distance from the mill axis. Every two closest blades of recessing elements forming troughs are displaced relative to each other by a dividing angle.

Since in this case the microrelief is planned with a uniform pitch S gj of depressions 2 and 3, then Cf; choose the same and equal

V;

VP

hzbo

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where u

VP

the angle of division between the two nearest blades of the cutting elements, forming depressions, degrees;

Sgn - depression depth, mm;

o feed per revolution, mm.

Each blade of the cutting element forming the protrusion 1 is offset relative to the previous blade of the cutting element forming the depression by an angle if.

Since all the projections of the planned microrelief have the same width of the support surface b, then Cf; . choose the same and equal

 ABOUT

-x36o t ,, J 2 -x360 °

 06

five

0

b s

2 JWCIKC

five

O

five

where is the angle of division between the blade of the cutting element forming the protrusion and the preceding blade of the cutting element forming the depression, hail; the width of the support surface of the protrusion, mm; the maximum feed per tooth at which. A swarm can be achieved, - that is the planned depth of the irregularities of the protrusion bearing surface, mm.

In the case of the cutter, the blades of the cutting elements forming the microrelief are placed at different levels 16-18 in the direction perpendicular to the surface to be treated.

The number of these levels is chosen equal to the number of planned levels of projections 1 and depressions 2 and 3 of a given microrelief, i.e. equal to number 3 (one level 16 protrusions and two levels 17 and 18 depressions).

31

accordingly, the blades of the cutting elements 10-15, the forming protrusions, are mounted on the upper level 16 (FIG. 3), and the blades of the cutting elements 4-9, forming the hollows, on the two lower levels 17 and 18. The blades of the cutting elements installed at level 17, they form depressions with a smaller depth, and at level 18, depressions with a greater depth.

The distance between level 16 and level I7 and 18 is determined by the formulas:

,; ,

where i1 and u2 are the distances between the levels;

h, is the planned depth of the irregularities formed by the blades of the level 16 cutting elements;

 the planned depth of the irregularities formed by the blades of the cutting elements of level 17; the planned depth of the irregularities guided by the blades of the level 18 cutting elements.

On the same diameter with the cutting elements forming the protrusions and vp

84

microrelief dyes have additional cutting elements 19-30, the blades of which are mounted on ypoii-not 31, located above level 16,

on which are installed the blades of the cutting elements that form the protrusions of the microrelief.

Blades extra cutting. Elements 19-30, by removing parts of the allowance, allow unloading the blades of the cutting elements that form the microrelief. As a result, it increases the durability of the blades that form the microrelief, which, in turn, allows an increase in the value of the longitudinal feed, at which a surface with the specified microrelief can be obtained.

Claims (1)

Invention Formula The method of positioning the cutting elements of a multi-blade tool for surface treatment with a given micro-relief according to the ed. ev No. 1217591, characterized in that, in order to improve tool durability and machining performance, additional cutting elements, the blades of which are set above the blades of the cutting elements, form the protrusions of the microrelief, are placed on the same diameter as the cutting elements of the microrelief. fug .; SS / 18 bgl 5dl fiyo.2 A-4 28 15 thirty 12 22 needles Compiled by V, GOLD Editor A. Ogar Tehred I. Glushchenko Proofreader, Cherni Order 2162/12 Circulation 976 Subscription VNIIZh of the USSR State Committee for Inventions and Discoveries 4/5, Zh-35, Raushsk nab. 113035, Moscow Production and printing company, Uzhgorod, st. Project, 4