SU1641495A1 - Apparatus for restoring inner teeth of gears - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used to restore gear wheels with internal teeth. The purpose of the invention is to improve the quality of restoring gear profiles by improving the conditions of plastic deformation. The device contains a profile rotating mandrel, deforming and supporting rolls with a drive, an additional supporting roll holder with a spring-loaded housing, and a T-shaped lever with a wedge mechanism. During operation, the profile deforming roller compresses the toothed neck on the mandrel which, through the L-shaped lever and the wedge mechanism, is moved by the radial shaft, and the pressing force is taken up by the supporting rollers, which allows to improve the product restorations, resulting in ff. , 6 Il.

Description

The invention relates to the processing of metals by pressure and can be used to restore gear wheels with internal teeth.

The purpose of the invention is to improve the quality of the restoration and the production capacity.

Fig, 1 shows a section a - a in figure 2. general form; figure 2 - the device, left view; Fig. 3 shows an additional drive for moving the mandrel, a general view; figure 4 - BZB B - B figure 3; Fig. 5 is a diagram for calculating the movement of the crosshead of the press and the center of the mandrel; figb is a diagram for calculating wedge angles.

The device is made in the form of a press and contains the lower part consisting of fixed supports 1 and 2, interconnected by tension bolts 3 and thrust bushings 4. In fixed supports 1 and 2, bores are made, which are pressed into radial bearings 5 falls on one side with covers 6, on the other - thrust bearings. In the radial 5 and thrust 7 bearings, a shaft 8 is pressed in, transmitting the rotation of the key 9 to the additional production roller 10 by means of a gear 11 mounted on the end of the shaft 8 and engaging with the gear 12, the rotation of which is attached from the spindle of the turning screw turning machine

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On the stationary supports 1 and 2 there is a second additional drive roller 13, mounted similarly to the additional roller 10 and driven by gear 12 (FIG. 1). In addition, the supports 1 and 2 are equipped with interchangeable stops 14 (figure 2), made in the BI de bushes and used to limit the movement of the traverse of the device.

The yoke is made as a team and contains movable supports 15 and 16, interconnected by straightening studs 17 and thrust bushings 18, and in supports 15 and 16 (Fig. 1) there are bores into which radial bearings 19 are pressed. on one side, covers 20, on the other, thrust bearings 21. In bearings 19 and 21 a shaft 22 is mounted, connected by a key 23 with a forming roller 24. Guides 25 are pressed in legs 1 and 2 of the lower part of the device (Fig. 2) associated with the crosspiece and sliding in the holes of the guides sleeves 26 fixed to movable supports 15 and 16 (Figure 1). The traverse through the plate 27 is connected to the rod of the hydraulic cylinder 28, which is rigidly mounted on the upper fixed supports 29 and 30.

Additional drive 10 and 13 (Fig. 2) and forming rollers 24 are located in the same plane, made in the shape of the outer chute of the wheel to be restored, have profile lugs 31 (fmg.1) for squeezing metal from non-working areas into the teeth wear zone, rectangular protrusions 32 for mounting the product on additional drive rolls 10 and 13 (wheel orientation) and subsequent running-in of the outer wheel bore. In addition, additional rolls 10 v 13 and forming roll 24 are made with side flanges 33 preventing the metal from moving to the ends of the wheel being restored. The device also contains a self-adjusting frame 34 (FIG. 3), made monolithic in the form of a toothed caliber and having a forming 35 and calibrating 36 parts, equipped with a shank 37. The mandrel 34 with its shank 37 is stopped in the radial 38 and thrust 39 bearings pressed in the housing 40. The housing 40 with respect to the bottom base of the casing 41 is spring-loaded 42 is compressed, mounted on pins x 43 s, with the possibility of strictly radial movement along the grooves 44 (Fig. 4) of the casing 41 in a vertical plane along with a mandrel 34, Thus ohm, the mandrel 34 is rotatably mounted, the vertical reciprocating movements of the power provided i PPM3 ° i

a thermal drive (not shown) connected through the studs 45 to the yoke 41; In addition, for a strictly vertical reciprocating movement of the mandrel 34 synchronously (Fig. 1) and the crosshead, an additional drive system is provided to ensure this movement and consisting of figurative lever 46, one arm rigidly connected to the crosshead, and the other to a wedge 47 sliding along the upper inclined surface of the housing 40 (FIG. 3) of bearings 38 and 39 bearing the shank 37 of the mandrel 34 and the bottom surface of the cover 48 of the yoke 41. Wedge 47 from falling out Held by adjusting bolts 49, passing through the holes of the latter and screwed into the holder 41. For the reciprocating movement of the wedge 47 on the adjusting bolts 49, compression springs 50 are installed. Moreover, in order to provide simultaneous movement of the mandrel 34 and the cross-pieces, the corners of the wedge 47 (Fig. 6) and the inclined surface of the housing 40 satisfy the relation

tgЈ

About 1 02

{Ol02 + d) tga

where / 5 is the angle from the horizontal of the lower end 47 or the inclined surface of the housing 40;

a - angle of 47 km relative to the vertical;

Ot, 02 is the amount of movement of the mandrel (Fig. 5);

6 - roll insertion amount.

The device works as follows.

A preheated to plastic deformation temperature (950-1000 °) gear wheel is mounted on the gear forming part 35 of the mandrel 34, with the teeth of the mandrel 34 entering the cavities of the teeth of the wheel to be restored and it is inserted together with the part into the device so that the wheel to be restored is between the side flanges 33 of the additional drive rolls 10 and 13, and the rectangular projections 32 entered the outer recess of the wheel to be restored, thereby ensuring the orientation of the wheel relative to the forming 24, and further drive rolls 10 and 13. Additional drive rolls 10 and 13 through shafts 8 and sixes 11 and 12 (FIG. 1) are connected with the spindle of a screw-cutting machine.

The actuator of the hydraulic cylinder 28 of the radial movement of the traverse is engaged. The upper forming roll 24 is moved together with the crossbeam and at the time of contact with the wheel being restored.

The drive of the two lower additional drive rolls 10 and 13 is turned on. In this case, the profile protrusions 31 of the rolls 10, 13 and 24 are pressed into the non-working surfaces of the wheel and the latter obtains rotation between them, simultaneously traversing the direction of movement of the metal to the worn out surfaces , and the side flanges of the 33 additional drive 10,13 and the forming 24 rolls prevent the metal from moving to the ends of the part being repaired. The rolling process with the redistribution of metal continues until contact of the movable supports 15 and 16 of the crosshead of the interchangeable stops 14 (Fig. 2), the traversing with the forming roller 24 ceasing, which limits the shaping process.

At the same time, the L-shaped lever 46 (FIG. 3) of the auxiliary drive system of the mandrel 34 moves together with the crosspiece, abutting against the surface of the wedge 47, causing the latter to move strictly in the axial direction, compressing the springs 50 and affecting the body 40 carrying the tailpiece 37 of the mandrel 34, in the vertical plane, compressing the spring 42 mounted on the pins x 43 of the sleeve 41, thereby ensuring the vertical movement of the mandrel with the restored part v of the device crosshead mounted on it.

Thus, the axis of the mandrel 34 (parts) during the movement of the crosshead by transferring the L-shaped lever 46 and the system of wedges constantly coincides with the axis of the inscribed circle D in the system of rolls 10, 13 and 24 (figure 2). A horizontal power drive (not shown) is connected, which is connected through studs 45 (FIG. 3) with the yoke 41 and the body 40 which carries the shank 37 of the mandrel 34. The mandrel 34 begins to exit the forming part 35 from the wheel being repaired and at the same time, the calibrating part 36 enters into the latter and, passing along the surface of the teeth of the wheel being restored, smoothes the dentate surface of the teeth, i.e. there is a run-in (movement of metal from non-working areas to worn surfaces) with simultaneous calibration of the toothed surface. Next, the rotational drive of the gears 11 and 12 (Fig. 1) of the lower auxiliary rolls 10 and 13 (Fig. 2) is turned off, the hydraulic cylinder 28 is lifted from the traverse of the device, the roll system is opened and the part is removed.

In this case, the L-shaped lever 46 (FIG. 3), which is rigidly connected with the crosshead by one shoulder, returns to its original position. Under the action of the springs 50, the wedge 47 moves to the onset of its action, the further movement of the latter is limited by the heads of the adjusting bolts 49. The springs 42 return the body 40 carrying the shank 37 of the mandrel 34 to its original position. The recovery process is complete.

Claims (7)

1. Device —inducing gear wheels with internal teeth, containing a profile rotating help with a shank, a profile forming roll, mounted on supports with possible rotation and equipped with a radial-displacement drive and flapping on the shape of the outer surface of the wheel to be restored, as well as the rest roller and lateral limiting gears. elements, characterized in that, in order to improve the quality of the restoration of the toothed profiles by improving the conditions of plastic deformation, the device is equipped with itelny basic alko, a holder with the spring-loaded cases - and. The L-oaaz lever with wedge mechanisms is installed in the main and secondary ways in a plane perpendicular to the movement of the profile roll, the profile mandrel is installed in a spring-loaded case with the possibility of no-translational movements, the latter being kinematically connected with the drive of the radial movement of the profmper roll by means of the maple mechanism and the L-shaped lever. 2. A device according to claim 1, characterized in that, in order to increase the productivity of the treatment, the cage with a spring-loaded body is provided with an additional drive for moving in the direction perpendicular to the direction of movement of the profile roll. 3. The device according to claims 1 and 2, k is kicking with the fact that the limiting elements are located on the end surface of the forming and support rolls. 4. The device according to PP.1 - 3 is distressing that the drive of the forming roll is made in the form of a traverse with a P drodel cylinder. 5. The device according to claim 1, of which is 1D ee- so that the drive of the mandrel of the molds in the form of an L-shaped lever, one arm rigidly connected with the crosspiece, and the other with a wedge interacting with the inclined surface of the body of the shank mandrel. 6. The device according to claims 1 and 4, characterized in that the wedge of the additional drive of the mandrel is installed inside the cage and is spring-loaded relative to its sidewall in the horizontal plane. 7. The device pop 1, characterized in that the support rolls have a common drive 1 Aa 28 . // // s $ N -HM SM M  IN S Oo 44 41 bb Compiled by Yu.Zharchenkov Editor N.Kishtulinets Tehred E. Tsa LucKorrector M.Kobyl nska Order 1106/91 Circulation 382 Subscription VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk emb. 4/5 Production and Publishing Combine Patent, Uzhgorod, Gagarin st., 101 34 4 Fig.b