SU1324781A1 - Gear-shaping cutter pointed head - Google Patents

Abstract

The invention relates to metal working, in particular, to a tool for gear processing machines. The purpose of the invention is to improve the dynamic characteristics of wheels for loaded gears by two-sided profile modification of the teeth of the wheels to be machined. Internal 2, 3 and 4 and external 5, 6 cutters are alternately fixed in the case of a borer sharp-edged head for machining conical wheels with circular teeth in housing 1, with the base surfaces 7, 8, 9, 10 of each group arranged in concentric circles , 12, and the straight cutting edges 13, 14, 15, 16, 17 incisors are inclined to the axial planes B of the head. Each second internal cutter is installed along its base surfaces with a turn in the face end plane of the head towards its axis by an angle determined from the relation cos | tg a -arctg (tgAa-cosX):: tga-cosX, where | - the angle of rotation of every second internal cutter in the face plane of the head; a is the angle of the profile of the tool producing surface; Yes - change of the angle of the profile of the tool's generating surface; a - angle profile of the cutter in the plane of the front surface; I, is the angle of inclination of the rectilinear cutting edge of the tool to the axial plane of the tool. 3 il. (About .4 with ISD 4 00

Description

The iMiiie image refers to the rvieTa.i; iQo6pa6oT - ke, in particular, to the tool for gear-cutting machines.

The purpose of the invention is to improve the dynamic characteristics of the wheels for loaded gear gears by two-sided full profile modification of the teeth of the wheels to be machined with a blade tool with a concave width, both external and internal surfaces.

FIG. 1 shows a cutting head, a plan view; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. 2

A gear-shaped sharpened head consists of a body 1, in which internal 2-4 and external 5 and 6 cutters are fixed alternately, the base surfaces 7-10 of each group are tangent to the corresponding concentric circumferences 11 and 12. The straight cutting edges 13-17 of all cutters inclined to the corresponding axial planes B at an angle.

Each second internal cutter 3 is installed in the housing 1 along its base surfaces 18 with a turn in the end plane in the direction of the axis OiOi of the head at an angle equal to:

r-AQ f- arctg (tgAcc-cos.) - tgcc cosA,

where - the angle of rotation of every second internal incisor;

a is a profile angle in a plane passing through the cutting edge at an angle K to the axial plane of the tool;

a is the angle of the profile of the tool producing surface; L a is the change in the angle of the profile of the tool producing surface;

X is the angle of inclination of the linear cutting edge of the tool to the axial plane of the tool.

Such an embodiment of the tool provides for changing the profile angle of its internal generating surface in the plane passing through the cutting edge of the internal cutter at an angle K to the axial plane B by the value of Les.

The treatment with a gear-cutting sharp head is carried out as follows.

The adjustment of the radial position of the cutting edges of the inner incisors is performed with control at the midpoint of the active part. In this way, the setting of the midpoints of all the inner cutting edges on one concentric circumference of the tool production surface is achieved. The extreme points of the cutting edges of the internal incisors participate in the work through one.

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five

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five

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because they overlap due to their crossing. The inner producing surface of the concave profile is formed by rotating the cutting head and by alternately participating in the operation of the upper and lower sections of the edges of the inner cutters installed in the housing, respectively, concentric. and with some reversal towards the axis of rotation. The outer cutting edges are exposed in a concentric manner in the usual manner. The concave profile of the outer generating surface is formed by the rotation of the rectilinear cutting edges of the outer incisors inclined at an angle to the axial planes.

The machining of the wheel teeth with a cutting head with a concave profile of both the outer and the inner producing surfaces provides for a double-sided full profile modification. The re-incisors of the incisors are carried out outside the body in a specially adapted tool.

Claims (1)

Invention Formula A gear blade is a sharp-cut head for machining conical wheels with circular teeth, on the front surface of the casing of which internal and external cutters are fixed in alternating order, the base surfaces of each group of which are arranged in concentric circles, and the straight cutting edges of the cutters are inclined to the axial planes of the head characterized in that, in order to improve the dynamic characteristics of the wheels for the loaded gears, through a two-sided full profile modification of the teeth processed to oles, each second internal cutter is installed on its base surfaces with a turn in the face end plane of the head towards its axis by an angle determined from the ratio gps; S- arctg (tgAa-cosX) where I is the angle of rotation of every second internal cutter in the face plane of the head; a is a profile angle in a plane passing through the cutting edge at an angle K to the axial plane of the tool; a is the angle of the profile of the tool's surface; Yes - change of the angle of the profile of the tool's generating surface; K is the angle of inclination of the rectilinear cutting edge of the tool to the axial plane of the tool. 0 2