SU1316759A1 - Appliance for gear-milling machine for removing burrs from teeth of spur wheels - Google Patents

Abstract

The invention relates to mechanical engineering and may be used in the machining of gears to remove burrs. The purpose of the invention is to increase the productivity and quality of processing by eliminating the creation of own burrs and ensuring uniform tool wear. The device contains a rack 2- placed on a fixed part of the machine, an earring 9 with a glass 10, in which a plunger 5 is mounted, preloaded with a spring 7. At the end of the plunger 5 there is a bracket 1 1 with a mandrel 12, on which are placed fco 05 SP with

Description

a cup cutter 3 and a cylindrical roller 4. Due to the friction forces between the end surface of the tool and the end of the machined gear, as well as the resultant normal pressure forces arising in the gearing of the gear ring and the cylindrical part of the tool,

one

This invention relates to machine

structure and can be used in machining gears for deburring both in the process of cutting teeth, and after cutting on separate equipment.

The purpose of the invention is to increase the productivity and quality of processing by eliminating the creation of own burrs and ensuring uniform tool wear.

FIG. 1 is a schematic of the device; FIG. 2 is a diagram of the kinematic connections of the device; FIG. 3 shows the path of movement of the tool along the tooth profile} in FIG. 4; a device for deburring a general view.

The gear to be machined 1 is mounted on the table of a milling machine with a vertical axis of rotation, and a vertical stand 2 of a deburring device (fig1) is mounted on the movable part of the frame.

The cutting tool is a stepped round cutter consisting of a cup cutter 3 for machining the face plane of a gear ring and a cylindrical roller 4 for machining a tooth profile.

During machining, when gearing rotates at gearing speed WQ, the tool performs a reciprocating movement in a horizontal plane under the action of a spring-loaded plunger 5, as well as rotational movement at a speed W around an axis parallel to the axis of rotation of the gear.

The end part of the cut 3 is elastically pressed against the end of the gear wheel 1 under the action of a spring 6 mounted on the vertical axis of rotation of the gear wheel 1313759

the tool simultaneously reciprocates along the face and profile of the ring gear and the rotational axis about an axis parallel to the axis of rotation of the gear wheel, which ensures complete removal of the burrs from the surfaces of the teeth to be processed, 4 sludge.

five

the structure, and the cylindrical surface of the roller 4 under the action of the elastic element 7 falls into the cavity of the tooth and thus engages with the gear wheel.

The device for deburring (Fig. 2) is positioned relative to the plane of symmetry 0-0 of the adjusting tooth 1 of the part wreath so that the horizontally on the axis of the spring-loaded plunger 5 of the stepped tool moves at an angle | b to the axis 0-0. During the gear milling process, the gear ring 1 of the part — the cylindrical roller 4 of the tool — generates a force P, directed normally to the contacting surfaces. This force is decomposed into a radial P and a circumferential PU.

The radial component of the force P is directed from the point of contact in the direction of movement of the plunger 5, and the circumferential force P is perpendicular to the component of P and contributes to the rotation of the cylindrical roller 4, freely mounted on an axis parallel to the axis of rotation of the gear.

The most optimal angle of inclination of the plunger 5 relative to the plane in which the mounted tooth of the crown is placed will be 5 KIM, at which the radial is 0

five

O

will be equal to the circumferential force P,

(J, i.,

p i p to - -M}

40

For this case, as can be seen from FIG. 2, the angle will be in the range of / b Y + "i, where y is the angular pitch of the gear wheel, equal to

360 °

 (Z is the number of teeth), oi is the angle

meshing equal to 20.

In the process of cutting teeth (Fig. 3), the tool for removing the burrs with its cylindrical part under the action of the spring 7 located on the plunger 5 sinks into the root of the tooth (dp) and under the action of the constituent forces Py and Pn receives a contraction moving in the direction of movement of the plunger 5 and the rotational movement of the cylindrical roller 4. With a continuous rotation of the gear wheel cylindrical roller

4 moves along the profile of the gear ring 1 of the part, while compressing the spring located on the plunger 5, respectively, occupies the position d, d, d, bending the top of the tooth (position d,) under the action of the spring force, moving along the protrusion-shaped contour of the gear crown, sinks into the cavity of the next tooth

Since the cup cutter 3 and the roller 4 with longitudinal grooves are mounted on the same axis (FIG. 1), the cup cutter 3 makes a reciprocating motion relative to the end of the gear,

The combination of rotational and reciprocating movements of the working surfaces of the tool relative to the end of the gear and the tooth profile helps to completely remove the burrs from these surfaces and eliminates their crushing into the tooth cavity. In the case of reciprocating movement of the tool, the burr output outside the processing limits is ensured.

The device for removing burrs from gear wheels consists of a plate 8 with a stand 2, by means of which the device is mounted on the frame of a gear-processing machine, an earring 9 with a cup 10 in which a plunger 5 is mounted, preloaded with a spring 7, At the end of the plunger 5 a bracket 11 with a mandrel is installed 12, on which a cup cutter 3 and a cylindrical roller 4 are placed, the cutting edges of which are formed by longitudinal slits.

The cylindrical roller 4 is pressed against the surface of the ring gear by a spring 7, the force of which can be regulated by a nut 13, the Cup cutter 3 is pressed against the end

ABOUT

five

five

0

. P

e Q

wheels by means of a spring 6 and is adjusted by a nut 14,

The deburring device operates as follows.

The plate 8 of the device is mounted on the fixed part of the frame of the gear processing machine. Earring 9 with plunger 5 is angled

p + about relative to the plane of symmetry of the installation tooth and fix nut 15,

The nut 13 adjusts the required force of pressing the roller 4 to the surface to be treated. Then the rotation of the gear wheel is set, during which the teeth are cut, I

B result of ci-w friction between

the end part of the cup cutter 3 and the end of the wheel cutter receives rotation with an angular velocity W,

Under the action of the resultant force of the normal pressure arising in the engagement of the ring gear and the cylindrical roller 4, the latter obtains a rotational motion with an angular velocity W., and under the action of the radial component plunger 5 together with the cup cutter 3 and the cylindrical roller 4 simultaneously perform reciprocating and rotational motion. Roller 4, having passed the top of the ring gear, under the action of the force of the spring 7-, moving along the reverse surface of the ring gear, sinks into the cavity of the next tooth and thus removes the burrs from all edges of the working profile of the ring and end. At the same time, burrs are prevented from being crumpled into the hollow of the z-tubes, and due to the reciprocating movement of the tool along the machining surface, the burrs are removed beyond the machining zone.

Claims (1)

Invention Formula Attachment to a gear milling machine for deburring the teeth of the cylindrical wheels, comprising a stand fixed on the fixed part of the machine and a cross bar with a mandrel mounted on the stand rotatably and vertically displaced relative to the latter, while this mandrel is spring-loaded and bears with the possibility of free rotation the cup cutter distinguishing5 13167596 so that, in order to improve the plunger and the bracket, rigid connection and quality of processing, which is connected with the latter, while the op- traverse is made in the form of an earring, the rack is placed in the bracket and is fitted with a movable roller with longitudinal cutting edges. ( fiez Editor M. Bandura Order 2383/10 Circulation 975 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 Compiled by I. Kuznedova Tehred L.OliynykKorrektor T.Kolb