CN218945920U

CN218945920U - Core bar clamping device for cold pilger mill

Info

Publication number: CN218945920U
Application number: CN202223122424.4U
Authority: CN
Inventors: 马彪; 张路遥; 陈洁; 王军; 漆启海; 黄效
Original assignee: Qingshan Steel Pipe Co ltd
Current assignee: Qingshan Steel Pipe Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-05-02
Anticipated expiration: 2032-11-22

Abstract

The utility model relates to a core rod clamping device used in a cold pilger mill, which comprises a box seat, wherein a sleeve is rotatably arranged on the box seat, the sleeve can be movably arranged on the box seat back and forth, the front end and the rear end of the sleeve penetrate out of the box seat, a limiting and adjusting mechanism used for fixing the front end of the sleeve is arranged on the front side of the box seat, an oil cylinder sleeve is fixedly connected on the rear side of the box seat, a piston sleeve is arranged in the oil cylinder sleeve in a matched manner, the piston sleeve is movably sleeved on the sleeve, a first adjusting threaded hole is formed in the rear end of the piston sleeve, a connecting sleeve is connected with threads on the first adjusting threaded hole, the connecting sleeve is rotatably sleeved outside the sleeve, the rear end of the connecting sleeve is rotatably connected with a conical holding cylinder, a plurality of clamping ports are formed in the periphery on the outer side wall of the rear end of the sleeve, and core rod chucks are radially arranged on the clamping ports, and the core rod chucks are arranged on the inner side wall of the conical holding cylinder in a matched manner.

Description

Core bar clamping device for cold pilger mill

Technical Field

The utility model relates to the technical field of cold pilger mills, in particular to a core rod clamping device used in a cold pilger mill.

Background

The cold pilger mill is a process device for cold rolling of pierced billets by utilizing annular ring shapes. The machine has better cogging performance and can roll non-ferrous metal seamless tubes with common precision. The cold pilger mill has the greatest characteristics of high material utilization rate, and precision and surface roughness superior to those of cold drawn pipes. The cold pilger mill generally comprises a main motor and a transmission mechanism thereof, a steering box, a transmission shaft, a rolling mill stand, a rotary feeding mechanism, a feeding chuck and a lathe bed, a core bar clamping device, an inlet chuck and an outlet chuck, a feeding device and a discharging device.

The mandrel clamping devices are arranged in a plurality of ways and are fixed on a rolling mill frame, such as a full-automatic continuous cold pilger mill with the application number of CN202010596859.9, and the full-automatic continuous cold pilger mill just comprises a rear mandrel clamping device and a middle mandrel clamping device, so that the middle mandrel clamping device can clamp the mandrel when a billet tube passes between the rear mandrel clamping device and the mandrel, and the mandrel clamping devices clamp the mandrel after the billet tube passes between the middle mandrel clamping device and the mandrel, and the mandrel clamping devices can be used for alternately clamping the billet tube. In addition, it should be noted that, the tail end of the core rod is connected with a core rod, the core rod is used for being sleeved on the blank pipe to move, the core rod mainly plays a role of participating in deformation of an inner hole of the blank pipe, so that a finished pipe reaches a specified requirement, the core rod clamping device is used for clamping the core rod, thereby playing a role of fixing the core rod, the position of the core rod clamping device clamped on the core rod is fixed, because a plurality of concave clamping grooves are formed in the position of the core rod for clamping the core rod, and a convex clamping block matched with the concave clamping grooves is arranged on a core rod clamping device for clamping the core rod, so that the position of the core rod is fixed as long as the position of the core rod clamping block is unchanged, namely, the position of a core rod and a roller in a rolling mill are also fixed, but when the wall thickness of a finished product is required to be controlled and the process is changed, the position of the core rod clamping device can only be moved slightly, the whole core rod clamping device is changed, but the quality of the core rod device is large, the movement is very troublesome, and the whole structure is easy to be loose due to random movement.

Disclosure of Invention

The utility model provides a core rod clamping device for a cold pilger mill, which can slightly adjust the positions of a core rod and a core rod, does not need to move the whole core rod clamping device, and solves the problems in the using process in the prior art.

The technical scheme of the utility model is realized as follows: the utility model provides a core bar chucking device for among cold pilger mill, includes the cassette, it is provided with the sleeve to rotate on the cassette, the sleeve can be moved around and set up on the cassette, the cassette is all worn out at telescopic front and back both ends, be equipped with on the front side of cassette and be used for carrying out spacing adjustment mechanism to the sleeve front end, fixedly connected with cylinder liner on the rear side of cassette, the cylinder liner fit is provided with the piston sleeve, piston sleeve movable sleeve is established on the sleeve, first regulation screw hole has been seted up on the rear end of piston sleeve, threaded connection has the adapter sleeve on the first regulation screw hole, the adapter sleeve rotates the cover and establishes outside the sleeve, the rear end of adapter sleeve rotates and is connected with the toper and embraces the section of thick bamboo, be the circumference on the rear end lateral wall of sleeve and seted up a plurality of chucking mouth, be radially provided with the core bar chuck on the chucking mouth, core bar chuck fit sets up on the inside wall of toper section of thick bamboo.

Preferably, the limit adjusting mechanism comprises a fixed sleeve and a movable bearing seat, the fixed sleeve is fixedly connected to the front end of the box seat, a second adjusting threaded hole is formed in the inner wall of the fixed sleeve, the rear end of the movable bearing seat is in threaded connection with the second adjusting threaded hole, and the front end of the sleeve is rotationally connected to the movable bearing seat.

Preferably, the limiting cavity is formed in the movable bearing seat, the limiting rings located in the limiting cavity are integrally formed in the outer side wall of the sleeve, thrust bearings are arranged on the front side and the rear side of the limiting rings, limiting steps used for limiting the thrust bearings on the rear side of the limiting rings are arranged on the inner side wall of the movable bearing seat, a pressing sleeve is connected to the front end of the inner side wall of the movable bearing seat in a threaded mode, and the pressing sleeve abuts against the thrust bearings on the front side of the limiting rings.

Preferably, the middle part of the outer side wall of the movable bearing seat is connected with a cap in a threaded manner, and the rear end of the cap abuts against the front end of the fixed sleeve.

Preferably, an oil cavity is arranged between the cylinder sleeve and the piston sleeve, a piston ring matched with the piston sleeve is arranged on the outer side wall of the piston sleeve and arranged in the oil cavity, a first oil through port and a second oil through port are formed in the cylinder sleeve, the first oil through port and the second oil through port are respectively communicated with the front side and the rear side of the oil cavity, the front end of the inner side wall of the cylinder sleeve and the piston sleeve form sealing fit, a sealing plug seat is fixedly connected to the rear end of the cylinder sleeve, and the sealing plug seat is in sealing fit on the outer side wall of the piston sleeve.

Preferably, annular grooves are formed in the outer side walls of the connecting sleeve and the conical holding cylinder, a connecting clamp is arranged between the connecting sleeve and the conical holding cylinder, the connecting clamp comprises annular clamping teeth clamped into the annular grooves, and a second thrust bearing is propped between the connecting sleeve and the conical holding cylinder.

Preferably, an oblique sliding groove penetrating through the rear end of the conical holding cylinder is formed in the inner side wall of the conical holding cylinder, the core rod chuck is in sliding fit with the oblique sliding groove, a chuck positioning sleeve is connected to the rear end of the sleeve in a threaded mode, and the chuck positioning sleeve abuts against the rear side of the core rod chuck.

In summary, the beneficial effects of the utility model are as follows:

1. the utility model can lead the sleeve to move back and forth on the box seat, thereby changing the front and back positions of the core rod chuck, thus being capable of adjusting the front and back positions of the core rod and the core rod without moving the whole core rod clamping device, and being simple and convenient.

2. When the positions of the core rod and the core rod need to move forwards, the positions of the core rod chuck are changed by moving the sleeve forwards, specifically, the spinning sleeve and the cap are loosened firstly, then the connecting sleeve which is connected with the first adjusting threaded hole in a threaded mode and the movable bearing seat which is connected with the second adjusting threaded hole in a threaded mode are rotated, the connecting sleeve and the movable bearing seat move forwards, the sleeve is pushed forwards at the same time, the conical holding cylinder and the core rod chuck move forwards at the same time, then the pressing sleeve and the cap are fixed, and the connecting sleeve and the movable bearing seat are reversely rotated after backward adjustment is carried out, so that the method is simple and convenient.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is an enlarged schematic view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view of the rear portion of the case of FIG. 1;

FIG. 4 is a schematic diagram of a core rod and a mandrel;

FIG. 5 is a schematic view showing the position of the mandrel in the initial state of the present utility model;

FIG. 6 is a schematic view of the state of the utility model in FIG. 5;

FIG. 7 is a schematic view showing the position of the mandrel in the roll after the sleeve of the present utility model has been adjusted forward;

fig. 8 is a schematic view of the state of the utility model in fig. 7.

In the figure: 1. a box base; 2. a sleeve; 3. a cylinder liner; 4. a piston sleeve; 5. a first adjustment threaded hole; 6. connecting sleeves; 7. a conical holding cylinder; 8. a clamping opening; 9. a core bar chuck; 10. a fixed sleeve; 11. a movable bearing seat; 12. a second adjustment threaded hole; 13. a spacing cavity; 14. a limiting ring; 15. a thrust bearing; 16. a limit step; 17. pressing the sleeve; 18. and a cap; 19. an oil chamber; 20. piston rings; 21. a first oil port; 22. a second oil through port; 23. a sealing plug seat; 24. an annular groove; 25. a connecting clamp; 26. annular latch teeth; 27. a second thrust bearing; 28. an oblique sliding groove; 29. a chuck positioning sleeve; 30. a core rod; 31. a core bar; 32. a convex clamping block; 33. a concave clamping groove; 34. and (5) rolling.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 to 8 of the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples:

as shown in fig. 1 to 8, the utility model discloses a core rod clamping device for a cold pilger mill, which comprises a box seat 1, wherein the box seat 1 is directly fixed on a rolling mill frame of the cold pilger mill, a sleeve 2 is rotatably arranged on the box seat 1, the sleeve 2 can be movably arranged on the box seat 1 back and forth, the front end and the rear end of the sleeve 2 penetrate out of the box seat 1, a limit adjusting mechanism for limiting the front end of the sleeve 2 is arranged on the front side of the box seat 1, a cylinder sleeve 3 is fixedly connected on the rear side of the box seat 1, a piston sleeve 4 is arranged in the cylinder sleeve 3 in a matched manner, the piston sleeve 4 is movably sleeved on the sleeve 2, a first adjusting threaded hole 5 is formed in the rear end of the piston sleeve 4, a connecting sleeve 6 is in threaded connection with the first adjusting threaded hole 5, the connecting sleeve 6 can be rotatably arranged outside the sleeve 2, a conical oil injection sleeve 7 is rotatably connected to the rear end of the connecting sleeve 6, the rear end of the sleeve 2 is provided with a plurality of cylinder sleeve clamping jaws 9 which are arranged on the outer side wall of the sleeve 2 in a matched manner, and a plurality of cylinder sleeve clamping jaws 9 are arranged on the cylinder sleeve jaws 9 in a matched manner, and the cylinder sleeve clamping jaws 9 are driven to be matched with the cylinder jaws 9 through the cylinder sleeve jaws 9.

As shown in fig. 2, the limit adjusting mechanism comprises a fixed sleeve 10 and a movable bearing seat 11, wherein the fixed sleeve 10 is fixedly connected to the front end of the box seat 1, a second adjusting threaded hole 12 is formed in the inner wall of the fixed sleeve 10, and the rear end of the movable bearing seat 11 is in threaded connection with the second adjusting threaded hole 12, so that the movable bearing seat 11 can be adjusted back and forth in the second adjusting threaded hole 12 through rotation, and the front end of the sleeve 2 is in rotary connection with the movable bearing seat 11.

The specific structure of the sleeve 2 rotationally connected to the movable bearing seat 11 is as follows: the limiting cavity 13 is formed in the movable bearing seat 11, the limiting ring 14 positioned in the limiting cavity 13 is integrally formed on the outer side wall of the sleeve 2, the thrust bearings 15 are arranged on the front side and the rear side of the limiting ring 14, the limiting step 16 used for limiting the thrust bearings 15 on the rear side of the limiting ring 14 is arranged on the inner side wall of the movable bearing seat 11, the pressing sleeve 17 is connected to the front end of the inner side wall of the movable bearing seat 11 in a threaded manner, the pressing sleeve 17 abuts against the thrust bearings 15 on the front side of the limiting ring 14, so that limiting is formed on the position of the sleeve 2, the sleeve 2 can only be in rotary fit between the two thrust bearings 15, and the pressing sleeve 17 is convenient to detach, so that limiting on the front end of the sleeve 2 is canceled.

In addition, in order to further improve the stability of the screw-fit of the movable bearing housing 11 on the fixed sleeve 10, a union cap 18 is screw-coupled to the middle portion of the outer side wall of the movable bearing housing 11, and the rear end of the union cap 18 abuts against the front end of the fixed sleeve 10.

In fig. 5 and 6, the mandrel 30, the mandrel 31, the sleeve 2 and the mandrel chuck 9 are in the initial position, at this time, the mandrel 30 is just located at the position of the roller 34, at this time, if the mandrel 30, the mandrel 31, the sleeve 2 and the mandrel chuck 9 are to be adjusted to the state of fig. 7 and 8, that is, the mandrel 31, the sleeve 2 and the mandrel chuck 9 are slightly moved forward, so that the mandrel 31 slightly penetrates the roller 34, so that the position of the sleeve 2 needs to be moved forward to change the position of the mandrel chuck 9, specifically, the spinning sleeve 17 and the cap 18 are loosened, then the connecting sleeve 6 screwed on the first adjusting threaded hole 5 and the movable bearing seat 11 screwed on the second adjusting threaded hole 12 are rotated, so that the connecting sleeve 6 and the movable bearing seat 11 are moved forward, at this time, the conical holding sleeve 7 and the mandrel chuck 9 are moved forward, then the pressing sleeve 17 and the cap 18 are fixed, and the connecting sleeve 6 and the movable bearing seat 11 are rotated backward, which is simple and convenient.

In the utility model, an oil cavity 19 is arranged between a cylinder sleeve 3 and a piston sleeve 4, a piston ring 20 matched and arranged in the oil cavity 19 is arranged on the outer side wall of the piston sleeve 4, a first oil through port 21 and a second oil through port 22 are arranged on the cylinder sleeve 3, the first oil through port 21 and the second oil through port 22 are respectively led into the front side and the rear side of the oil cavity 19, wherein the front end of the inner side wall of the cylinder sleeve 3 and the piston sleeve 4 form sealing fit, in addition, a sealing plug seat 23 is fixedly connected to the rear end of the cylinder sleeve 3, the sealing plug seat 23 is in sealing fit on the outer side wall of the piston sleeve 4, when oil enters from the first oil through port 21, the piston ring 20 is pushed so as to enable the piston sleeve 4 to move backwards, the piston sleeve 4 drives a connecting sleeve 6 to move backwards, so as to drive a conical holding cylinder 7 to move backwards, the conical holding cylinder 7 moves backwards to clamp a core rod 31 towards the inside of the sleeve 2, a plurality of convex clamping blocks 32 are arranged on the inner side of the core rod clamping head 9, and concave clamping grooves 33 for clamping the convex clamping blocks 32 to be clamped in.

Wherein, the concrete structure that a cone-shaped holding cylinder 7 is rotationally connected on the connecting sleeve 6 is: annular grooves 24 are formed in the outer side walls of the connecting sleeve 6 and the conical holding cylinder 7, a connection clamp 25 is arranged between the connecting sleeve 6 and the conical holding cylinder 7, the connection clamp 25 comprises annular clamping teeth 26 clamped into the annular grooves 24, the connecting sleeve 6 and the conical holding cylinder 7 are connected through the connection clamp 25, the conical holding cylinder 7 can rotate relative to the connecting sleeve 6 in the connection clamp 25, and a second thrust bearing 27 is propped against the middle of the connecting sleeve 6 and the conical holding cylinder 7 in order to improve the smooth degree of the conical holding cylinder 7 when rotating relative to the connecting sleeve 6.

The specific structure of the core bar chuck 9 matched on the inner side wall of the conical holding cylinder 7 is as follows: the inner side wall of the conical holding cylinder 7 is provided with an inclined sliding groove 28 penetrating through the rear end of the conical holding cylinder 7, the core rod chuck 9 is in sliding fit with the inclined sliding groove 28, in addition, the rear end of the sleeve 2 is in threaded connection with a chuck positioning sleeve 29, and the chuck positioning sleeve 29 abuts against the rear side of the core rod chuck 9, so that the position of the core rod chuck 9 is limited.

Also, the terms pointed out by the present utility model are as follows: the directional or positional relationships indicated by the terms "front", "rear", "vertical", "horizontal", etc., are based on the directional or positional relationships shown in the drawings, are merely for convenience in describing the utility model and to simplify the description, and are not indicative or implying that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed to limit the scope of the utility model.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A core bar chucking device for in cold pilger mill, includes the case seat, its characterized in that: the novel oil cylinder is characterized in that a sleeve is rotationally arranged on the box seat, the sleeve can be movably arranged on the box seat in a front-back mode, the front end and the rear end of the sleeve penetrate out of the box seat, a limiting and adjusting mechanism used for limiting the front end of the sleeve is arranged on the front side of the box seat, an oil cylinder sleeve is fixedly connected to the rear side of the box seat, a piston sleeve is arranged in the oil cylinder sleeve in an matched mode, the piston sleeve is movably sleeved on the sleeve, a first adjusting threaded hole is formed in the rear end of the piston sleeve, a connecting sleeve is connected to the first adjusting threaded hole in a threaded mode, the connecting sleeve is rotationally sleeved outside the sleeve, a conical holding cylinder is rotationally connected to the rear end of the connecting sleeve, a plurality of clamping openings are formed in the outer side wall of the rear end of the sleeve, core rod clamping heads are radially arranged on the core rod clamping openings, and the core rod clamping heads are arranged on the inner side walls of the conical holding cylinder in a matched mode.

2. The mandrel gripping device for use in a cold pilger mill according to claim 1, wherein: the limiting and adjusting mechanism comprises a fixed sleeve and a movable bearing seat, the fixed sleeve is fixedly connected to the front end of the box seat, a second adjusting threaded hole is formed in the inner wall of the fixed sleeve, the rear end of the movable bearing seat is in threaded connection with the second adjusting threaded hole, and the front end of the sleeve is rotationally connected to the movable bearing seat.

3. The mandrel gripping device for use in a cold pilger mill according to claim 2, wherein: the movable bearing seat is characterized in that a limiting cavity is formed in the movable bearing seat, limiting rings positioned in the limiting cavity are integrally formed in the outer side wall of the sleeve, thrust bearings are arranged on the front side and the rear side of the limiting rings, limiting steps used for limiting the thrust bearings on the rear side of the limiting rings are arranged on the inner side wall of the movable bearing seat, a pressing sleeve is connected to the front end of the inner side wall of the movable bearing seat in a threaded manner, and the pressing sleeve abuts against the thrust bearings on the front side of the limiting rings.

4. The mandrel gripping device for use in a cold pilger mill according to claim 2, wherein: the middle part of the outer side wall of the movable bearing seat is connected with a cap in a threaded manner, and the rear end of the cap abuts against the front end of the fixed sleeve.

5. The mandrel gripping device for use in a cold pilger mill according to claim 1, wherein: an oil cavity is arranged between the oil cylinder sleeve and the piston sleeve, a piston ring matched with the piston sleeve is arranged on the outer side wall of the piston sleeve and arranged in the oil cavity, a first oil through port and a second oil through port are formed in the oil cylinder sleeve, the first oil through port and the second oil through port are respectively communicated with the front side and the rear side of the oil cavity, the front end of the inner side wall of the oil cylinder sleeve is in sealing fit with the piston sleeve, a sealing plug seat is fixedly connected to the rear end of the oil cylinder sleeve, and the sealing plug seat is in sealing fit on the outer side wall of the piston sleeve.

6. The mandrel gripping device for use in a cold pilger mill according to claim 1, wherein: annular grooves are formed in the outer side walls of the connecting sleeve and the conical holding cylinder, a connecting clamp is arranged between the connecting sleeve and the conical holding cylinder, the connecting clamp comprises annular clamping teeth clamped into the annular grooves, and a second thrust bearing is arranged between the connecting sleeve and the conical holding cylinder in a propping mode.

7. The mandrel gripping device for use in a cold pilger mill according to claim 1, wherein: the inner side wall of the conical holding cylinder is provided with an oblique sliding groove penetrating through the rear end of the conical holding cylinder, the core rod chuck is in sliding fit with the oblique sliding groove, the rear end of the sleeve is connected with a chuck positioning sleeve in a threaded manner, and the chuck positioning sleeve is propped against the rear side of the core rod chuck.