SU1701495A1 - Method for finishing of cutting tool - Google Patents

Abstract

The invention relates to a machine tool industry, the manufacture of a cutting tool, and can be used to finish the working surfaces of tools mainly from a hard alloy. The purpose of the invention is the expansion of technological capabilities by providing fine-tuning of curvilinear edges. A cylindrical shaped door made of copper or cast iron is installed on a machine spindle. and the cross feed and waggle with the cutter along the path of the equidistant blade of the cutter in the plan When working the cutter, a finishing paste is applied to the closet, the directions of its rotation are reversed, and the cutter is moved along the said trajectory. 3 sludge.

Description

The invention relates to a machine tool industry, the manufacture of a cutting tool and can be used to finish the working surfaces of tools, mainly of hard alloy.

The purpose of the invention is the expansion of technological capabilities by ensuring the refinement of curved edges.

FIG. 1 shows a diagram of the installation of the cutter during the formation of the working area of the doorway and during the finishing process; FIG. 2 is a view A in FIG. 1, the movement of the tool; in fig. 3 shows successive positions of the tip of the tool moved during the formation of the working zone of the closer.

Closer 1, made of copper or cast iron, is attached to the spindle of a lathe (not shown). Designed for finishing, the cutting tool is a cutter 2, the blade of which is outlined in terms of a radius r + at the top of G2 and radii at the periphery

P and GZ set at an angle and relative to the closer 1, determined from the equation

/ -V - V (C a (9 b

) Lg

where a is the angle between the tangents to the point of contact of the cutting tool with the working area of the closer and to the surface of the cutting tool,

d is the diameter of the abrasive grains,

Rz is the surface roughness of the closer;

Rg is the radius of the section of the working area of the doorway, equidistant radius at the top of the cutting tool

g is the radius at the tip of the cutting tool;

k -1.5-2 - empirical coefficients depending on the material of the cutting tool

a - 0.3-0.4;

vj o

Ј you ate

b-0.1-0.2.

The parameters of this empirical equation are determined from the conditions, on the one hand, the exclusion of micrographs and cracks on the surface being brought, and on the other hand, the desire to increase the productivity of the finishing.

Larger values of the coefficients k, a., B must be chosen for days that are more fragile, and smaller ones for less fragile materials of the tool to be brought.

The rotation of the reamer 1 in the direction of the blade of the cutter 2 informs the cutter 2 of a longitudinal and transverse feed in which it moves along the trajectory 3, to an equidistant blade of the cutter 2 in plan. In this case, the cutter 2 sharpens the doorway 1, forming a working area on it. The shape of this working area is determined by both the path of movement of the cutter 2 and the shape of the profile of the cutter 2 in plan. The plane forming this surface is equidistant to the profile of the cutter 2 in the plan and in the case under consideration consists of three conjugated radius sections 4-6, equidistant with respect to rezvi cutter 2. outlined respectively with radii r1,

G, G2.

For the finishing process, the radius of the angle at the cutter head 2 g and the equidistant portion of the working surface 5 of the adjusting 1, the value of which is a pair of w-irs of the cutter angle equation 2 are decisive. When finishing the cutter 2 on the back surface, it is advisable to form the surface of the close up on its cylindrical surface, and when fine-tuning on the front surface - on the highlander of the close up 1.

The depth of the working area of the closer h must not be less than the height of the finished part of the cutter profile 2 in plan. After forming the working zone of the closet 1, a finishing paste is applied to it and the direction of its rotation is reversed - from the blade.

Moving the cutter 2 along the same trajectory 3, along which it moves during the formation of the working surface of the closer, and maintaining its constant installation angle relative to the closer, i.e. the plane-parallel movements are performed, the cutter is adjusted.

The proposed method allows to bring the curvilinear (radius) edges of the incisors on the same machine, on which the finished incisor works.

The method can be implemented on any CNC machine tool that provides multiple movement of the cutting tool along a single path, without the use of additional tools. The method significantly reduces the accuracy requirements for the positioning of the cutting tool during fine tuning, since each of the trimming cutting tools cuts a working surface in the bottom panel before finishing. The shape of this surface takes into account both the installation of this cutting tool and the individual features of its profile. All this provides the possibility of expanding the area of finishing the edges of the cutting tools.

Claims (1)

Claims The method of finishing the cutting tool, in which initially form the working area of the door closer by treating it with a cutting tool with their relative working movement, after which they are moved in the opposite direction to the original one, characterized in that volynyynk edges, take a cylindrical closet, form a working area on its cylindrical surface, while the cutting tool reported longitudinal and across feed, moving the tool along a path equidistant to its cutting edge, and tilting the tool relative to the door closer HS is the angle determined by the formula (: g ) where a is the angle between the tangents to the point of contact of the cutting tool with the working area of the closer and to the surface of the cutting tool; d is the diameter of the grains of the abrasive paste; RZ is the surface roughness of the closer; Rg is the radius of the section of the working area of the doorway, equidistant radius at the top of the cutting tool; g is the radius at the tip of the cutting tool; k 1,5–2 are empirical coefficients depending on the material of the cutting tool; a 0.3-0.4; L 0.1-0.2, then the cutting tool is moved along the trajectory that coincides with its trajectory during the formation of the working area of the donor. I Formation of a fine-tuning fug / Editor E. Sligan Compiled by T. Petukhova Tehred M. Morgental (ft / hz Proofreader O. Kravtsov