SU753521A1 - Hot rolling mill for rolling cone toothed gears - Google Patents

Description

one

The invention relates to the processing of metals by pressure and can be used for rolling conical wheels.

Known mill for rolling conical gears, containing a frame, placed in the frame with the possibility of rotation of the spindle with preparation and gear-rolling tool, as well as synchronization of the wheel I.

The disadvantage of this mill is that the billet is heated outside the mill, there is no preheating of the billet during knurling and the accuracy of the resulting wheels is low.

Also known is a hot rolling mill for bevel gears, comprising a frame, a spindle with clamping mechanisms and a workpiece rotation mounted in a frame for rotation, a movable spindle with a gear-mounted tool and rotation drives and tool displacement mounted on it, a two-hook loading device having HYD01-SHLINDER lifting., hydraulic cylinder rotation and hydraulic cylinder gripping the workpiece, a transformer with an HDTV inductor 2.

A disadvantage of the known mill is the removal of the HDTV inductor after heating the billet from the knurling area, which leads to a decrease in the quality of wheel rolling due to cooling of the billet during the removal of the HDTV inductor and supplying the gear rolling tool, as well as E gear grinding process. In addition, the presence of autonomous mechanisms for the drive of the boot device and the heating inductor complicates the design of the device.

The purpose of the invention is to increase the quality of knurling by ensuring that the workpiece is heated during the knurling process.

This goal is achieved by that the mill is equipped with an additional lift hydraulic cylinder; and a transformer is placed between the two grippers of the loading device on the hydraulic cylinder of the booster and that of the loading device, and the additional hydraulic cylinder of the transformer is installed coaxially with the hydraulic lift cylinder of the loading device with the possibility of interaction with the piston of the hydraulic lifting cylinder.

Figure 1 shows the camp, a General view of figure 2 - section aa in figure 1 (plan view of the boot device); on fig.Z - the node in figure 1; figure 4 - node P in Fig ..

The hot rolling mill for taper gears includes a bed 1 (see Fig. 1), a spindle 2 of the products with mechanisms for clamping and rotating the workpiece, and in turn cade 3 a movable spindle 4 with a bullet by tool 5, spindle feed drive 4, consisting of a system of levers of Euler and hydraulic cylinder 7 and a rotation drive of tool spindle 8 pivotally mounted on frame 1, adjustable stops 9, rigidly mounted on frame 1,

At the front end of the frame 1, a loading device, 10, consisting of a hydraulic cylinder 11, a hydraulic cylinder 12, is mounted.

and a turntable 13, on which is installed a transformer 14 with a sector inductor 15 HDTV rigidly attached to it. Transformer 14 is associated with a movable battery25.

16 capacitors placed autonomously. On the platform.13 there are also installed two hydraulic cylinders 17c with mechanisms 18 dL of simultaneous gripping of two blanks 19. Transformer 30 14 with heating inductor 15 is located in the center of the turntable

13 between the cylinders 17.

The spindle 2 of the product contains a faceplate-synchronizer with the chuck clamp 2035, and the spindle 4 of the tool faceplate-synchronizer 21 (FIG. 3). Tsil Ndr 11 lifting the boot device 10. has a main piston rod 22 and an additional 23 (figure 4) ..

On the bed 1 posted by

Telny device 24 and feeder 25 blanks.

The camp works as follows.

At the end of the next cycle of knurling, the platform 45 13 rises with a transformer 14 and cylinders

17 by moving the main porous rod 22 of the cylinder 11 lifting the loading device 10. Thereafter, the platform 50 13 rotates half a way, for example, 45, in the loading direction, lowers the platform 13, seizes the workpiece 19 from the feeder 25 by the gripping mechanism 18 (Fig. 2)

with the simultaneous gripping of the billet of its workpiece, the spindle 2 of the product .. Raising the spindle of a1, turning a full turn, for example 90, towards the unloading side, launching the platform 13c of the billet and 19, while the billet 19, taken of the feeder 25, is set to

pindel 2 products, and knurled the workpiece in the drive 24.

Then the platform 13 rises, the workpiece is clamped on the spindle 2, the platform rotates in the opposite direction 65

on the half passage (45) and lowering it to the initial position, in which the inductor 15 is under the workpiece on the spindle 2 of the product, which at this time is already hitting. Thereafter, a cooling fluid is supplied to the synchronization faceplate 20 and the workpiece is heated by an inductor 15 HDTV. At the end of heating, a command is issued to turn on the supply of the continuously rotating spindle of the tool 4 by means of levers b and to partially raise the platform 31 with the inductor 15 to a height h (the amount of tooth growth during tooth formation) by means of an additional piston 23 of the cylinder 11 lifting the loading device 10.

During the knurling process, inductor 15 may remain both on and switched to preheat mode, and may also be turned off altogether.

During the knurling process, the faceplate synchronizers 20 and 21 (fig. 3) of both spindles interlock, providing a tight and accurate kinematic connection between the tool 5 and the workpiece 19.

 The tool moves to the stops 9, and then it reverses and finishes rolling out the rolled teeth.

At the end of the knurling, the tool 4 spindles are retracted to their original position, the coolant supply to the faceplate-synchronizer 20 is turned off, the knurled workpiece is unclamped on the product spindle 2, and it is stopped. The loop ends.

The advantages of the proposed hot-rolling mill for bevel gears are that the gear rolling performance increases by 20% by reducing the time between the end of heating of the workpiece and the start of gear rolling and the quality of rolling of the bevel wheels by making it possible to control the heating of the workpiece during gear formation.

Making bevel gears on a rolling mill Using the plastic deformation method, the metal can be saved by 20-25% compared to the gear cutting method.

Claims (2)

1. A hot rolling mill for bevel gears containing a frame placed in the frame rotatably with a spindle with mechanisms for clamping and rotating the workpiece, a movable spirel with mounted gearing tools and rotating and repositioning tools for the tool, loaded with a device with two 5GVATG1mmi the lifting cylinder, the hydraulic cylinder turning and the capture cylinder of the workpiece, as well as the transformer with an HDTV inductor, which in order to improve the quality of knurling by After heating the workpiece during the knurling process, it is equipped with an additional hydraulic cylinder for raising the transformer, and the transformer is placed between two grippers of the loading device on the rod of the hydraulic cylinder for turning the loading device. 2. The mill according to claim 1, Clause J. “so that the additional lift cylinder of the transformer is mounted coaxially to the lift hydraulic cylinder with the possibility of interaction with the lift cylinder piston. Information sources,; taken into account in the examination 1. US patent 124U9I7, kl.80-1b, 1917 ... 2.Tselikov A.I. and others. Special rolling mills. M., Metallurgists, 1971, p. 27 "-2aO (prototype).