Tailstock of rotary drawing machine

Abstract

FIELD: metal forming.SUBSTANCE: invention can be used in rotary drawing machines. The tailstock of the machine contains a housing with a through hole and a quill drive. The drive is made in the form of a hydraulic cylinder rod containing a sleeve with a cover and a bearing box with a pressure flange. The axle box has an annular groove and is fixed in an annular groove made in the housing. The sleeve is installed in the annular groove of the axle box and secured in the pressure flange and in the clamp of the cover fixing unit by means of fixing half rings. The half rings are installed in annular grooves made on the side surface of the sleeve on both sides.EFFECT: increasing the maintainability of the tailstock.2 cl, 1 dwg

Description

[0001] The invention relates to a tailstock of a rotary drawing machine and can be used in the metalworking industry.

[0002] The tailstock of a rotary drawing machine was chosen as a prototype, containing a housing with a through hole acting as a sleeve for driving the quill, and a hydraulic cylinder with fittings [RU98703U1, publication date: 10 / 27 / 2010].

[0003] A disadvantage of the prototype is the low maintainability of the rotary drawing machine tailstock due to the inability to repair the quill drive separately from the tailstock housing. Repairing the quill drive requires disconnecting the entire tailstock from the machine and then repairing the inner surface of the through hole. If the inner surface of the housing wears, the quill drive will become loose relative to the tailstock housing, increasing the risk of scoring and jamming the quill drive in the tailstock housing. Repairing the quill drive requires boring or replacing the tailstock housing, which complicates the tailstock repair process and can lead to downtime for the rotary drawing machine.

[0004] The technical problem that the invention is aimed at solving is to eliminate the existing shortcomings of the prototype.

[0005] The technical result that the invention is aimed at achieving consists in increasing the maintainability of the tailstock of a rotary drawing machine.

[0006] The essence of the invention is as follows.

[0007] The tailstock of a rotary drawing machine comprises a housing with a through hole and a quill drive containing a sleeve with a piston rod. Unlike the prototype, the quill drive is the piston rod of a hydraulic cylinder, detachably connected to the tailstock housing.

[0008] The quill drive provides the ability to move the rod with the quill in the opening of the housing and can contain a sleeve and a sleeve cover fixing unit, wherein on the side surface of the sleeve annular grooves can be made in which fixing half rings are installed, and the housing additionally includes a guide sleeve by means of which the rod is installed in the opening of the housing, a quill drive fixing unit in the housing, containing a box, in the side surface of which an opening is made in which a nozzle is installed, and a pressure flange, wherein the box is fixed in the housing, and the pressure flange is fixed on the box by means of a threaded connection, and the sleeve is fixed in the flange by means of fixing half rings.

[0009] The tailstock may include a quill drive locking unit. The quill drive locking unit within the housing may comprise a bushing and a clamping flange, allowing for repair or replacement of the quill drive without the need to repair or replace the tailstock, thereby increasing the maintainability of the rotary drawing machine tailstock. The bushing guides the quill drive rod and may have annular grooves for installing rod seals. A hole may be made in the side surface of the bushing, housing a fitting for supplying or discharging fluid. The bushing allows for fastening the clamping flange to the housing. The bushing can be fastened to the housing using a threaded connection. Additionally, to improve the maintainability of the rotary drawing machine tailstock, the bushing can be secured in an annular groove in the housing.Additionally, to improve the maintainability of the tailstock of the rotary drawing machine, the axle box may contain an annular groove made in the base of the tailstock, into which the sleeve is installed.

[0010] The clamping flange allows the quill drive to be attached to the axlebox. The clamping flange can be secured to the axlebox via a threaded connection and to the sleeve via retaining half rings. For this purpose, an annular groove is machined on its inner surface, which can engage with the retaining half rings.

[0011] Additionally, to improve the maintainability of the rotary drawing machine tailstock, the rod can be secured in the housing using a guide sleeve. To further improve the maintainability of the rotary drawing machine tailstock, the cover locking unit can include a sleeve cover clamp. The clamp can be secured to the sleeve using locking half rings, and the sleeve cover can be secured to the clamp using threaded elements.

[0012] The invention features a previously unknown set of essential features, enabling the use of a dismountable quill drive, allowing for the replacement and repair of the drive and guides in the event of failure without the need to remove and repair the entire tailstock of the rotary drawing machine. Furthermore, in the event of failure of the piston rod or the rod itself, it is sufficient to remove the quill drive from the tailstock housing, after which the rod or piston rod can be repaired or replaced.

[0013] This ensures the achievement of a technical result consisting in increasing the maintainability of the tailstock of the rotary drawing machine.

[0014] The invention has a set of essential features previously unknown in the prior art, which indicates its compliance with the patentability criterion of “novelty”.

[0015] The invention is explained by the following figures.

[0016] Fig. 1 - Tailstock of the rotary drawing machine, longitudinal section.

[0017] To illustrate the possibility of implementation and a more complete understanding of the essence of the invention, a particular case of its implementation is presented below, which can be changed or supplemented in any way, while the present invention is in no way limited to the presented version.

[0018] The quill drive comprises a sleeve 12 with a drive cover locking unit, a rod 14 with a quill 16 on one side, and a piston 18 with sealing elements on the other side. The quill 16 is configured to rotate within the rod 14, for which purpose the quill 16 comprises rolling bearings 20 and a thrust bearing, which ensures the ability to accept axial loads transmitted to the quill 16. On the side surface of the sleeve 12, annular grooves are formed on both sides, into which locking half rings 22 are installed. The cover locking unit comprises a clamp 24 and a sleeve cover 26. An annular groove is formed on the inner surface of the clamp 24. The clamp 24 is fixed on the sleeve 12 by means of fixing half rings 22. In the base of the cover 26 of the sleeve there is an opening into which the nipple 28 is installed. The cover 26 of the sleeve is fixed on the clamp 24 by means of threaded elements 30.

[0019] An annular groove is made in the housing 10 on the side opposite the quill 16. The locking unit comprises a journal box 32 with a pressure flange 34. An annular groove is made at the base of the journal box 32, and an opening is made in the side surface in which a nipple is installed. On the inner surface of the journal box 32, annular grooves are made in which sealing elements 36 are installed. The journal box 32 is fixed in the annular groove of the housing 10. On the side of the journal box 32, the pressure flange 34 has an annular groove. The pressure flange 34 is fixed to the journal box 32 by means of a threaded connection, and to the sleeve 12 by means of fixing half rings 22.

[0020] The quill drive is fixed in the annular groove of the axle box 32 in such a way that the rod 14 is located in the through hole of the housing 10, while the rod 14 is fixed with the possibility of rotation in the housing 10 from the side opposite the quill drive, by the guide sleeve 38.

[0021] The invention works as follows.

[0022] The workpiece is clamped in the spindle of the rotary drawing machine and pressed against the spindle 16. To achieve this, hydraulic fluid is supplied to the hydraulic cylinder cavity through the nipple 28. The clamped workpiece is processed by rolling rollers. After processing, the workpiece is removed, and hydraulic fluid is supplied to the rod end of the sleeve 12 through the nipple.

[0023] During tailstock operation, quill drive components may fail. Specifically, if piston 18 with seals fails, the quill drive must be disconnected from housing 10. To do this, disconnect clamping flange 34 from axlebox 32, then remove rod 14 with quill 16 from tailstock housing 10. Then, remove rod 14 from the quill drive and replace piston 18 with seals or rod 14 with the piston assembly. Reassembly is then performed in the reverse order of disassembly.

[0024] Also, if the inner surface of sleeve 12 is worn, it must be replaced, as the seal between the rod and piston cavities of the quill drive is compromised. To repair the tailstock, the quill drive must be disconnected from housing 10 and then disassembled to replace sleeve 12. To do this, clamping flange 34 is disconnected from axle boxes 32, after which piston rod 14 is removed from the quill drive. Sleeve cover 26 is then disconnected from clamp 24. After this, retaining half rings 22 are removed from their grooves and clamp 24 is removed from clamp flange 34. Then, take a new or reconditioned sleeve 12 and reassemble in the reverse order of disassembly.

[0025] Thus, in the event of failure of the tailstock quill drive components, repair of individual quill drive components is possible without the need to disconnect the housing 10 from the machine or replace the rotary drawing machine tailstock. This ensures the technical result of improving the maintainability of the rotary drawing machine tailstock.

Claims

1. A tailstock for a rotary drawing machine comprising a housing with a through hole and a quill drive, characterized in that the quill drive is made in the form of a hydraulic cylinder rod containing a sleeve with a cover provided with a unit for fixing it with a clamp, and an axle box with a clamping flange fixed to it by means of a threaded connection, wherein the axle box is made with an annular groove and is fixed in an annular groove made in the housing, and the sleeve is installed in an annular groove of the axle box and is fixed in the clamping flange and in the clamp of the cover fixing unit by means of locking half rings installed in annular grooves made on the side surface of the sleeve on both sides.

2. The tailstock according to paragraph 1, characterized in that it is equipped with a guide sleeve by means of which the rod is fixed in the housing on the side opposite the quill drive.

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