CN218361323U - A roll changing device for piercing machine - Google Patents

Abstract

The utility model relates to a roll changing device for a perforating machine, which belongs to the technical field of metal rolling and comprises a supporting device and a disengaging gear which are arranged under a main transmission shaft and are arranged in the front and back direction; the supporting device comprises a lifting carrier roller, the lifting carrier roller is provided with a limiting structure to limit the axial position of the main transmission shaft, the lifting carrier roller is connected with a lifting driving device, and the lifting driving device drives the lifting carrier roller to ascend to support the main transmission shaft; disengaging device includes the shift fork just to the flexible spline position setting of final drive shaft, the fork mouth both sides inboard of shift fork is equipped with the gyro wheel relatively, the stalk portion of shift fork articulates on the disengaging device base, be equipped with shift fork actuating mechanism on the disengaging device base, shift fork actuating mechanism drive shift fork is around its articulated center certain angle of swing to it is flexible with setting up at final drive shaft flexible spline department and being the preceding disc of pushing away of arranging around and pushing away the disc effect after and stirring final drive shaft, the unbalance loading and the card of current side sliding frame structure have been avoided and have been hindered, roll changing efficiency has been improved.

Description

A roll changing device for piercing machine

technical field

The utility model belongs to the technical field of metal rolling, and relates to a roll changing device for a piercing machine.

Background technique

Generally, the production process of hot-rolled seamless steel pipes will use the equipment of piercing machine to perforate the solid tube billet. The piercing machine is mainly composed of the front billet pusher, the piercer body, the first stage of the background, the second stage of the background, and the roll transmission device.

The main body of the piercer consists of two tapered rollers arranged up and down, the axes of the rollers form a certain angle, and two semicircular guide plates are arranged on the left and right, which form a closed circular pass with the rollers.

The exit of the piercing machine is arranged in turn with the first section of the backstage, the second section of the backstage and the roll transmission device. The first section of the backstage is mainly composed of 5-6 centering holding rollers and a set of transport rollers. Head cooling device or head circulation replacement device, the second stage of the backstage is mainly the gantry thrust seat, the ejector trolley and the track, etc.

The ejector rod of the piercing machine is a special tool made of a hollow steel pipe with a length of about 15-20 meters. The head is equipped with a conical plug, and the tail is connected with the second-stage ejector rod trolley in the background. The ejector trolley is driven by wire rope or rack, and can move quickly back and forth. When moving forward, it can drive the ejector rod forward. After the plug is extended to the set position in the punching machine, the gantry thrust seat locks the ejector rod trolley to withstand the axial thrust of the punching. The roller hugs the ejector rod to ensure that the center line of the plug is consistent with the center line of piercing and rolling.

The roll transmission device includes a motor, a reducer, a main drive shaft, and a supporting and disengaging device for the main drive shaft. Wherein the main transmission shaft is a telescopic cardan shaft, the rear part of the cardan shaft is a whole, the middle part and the front part are a whole, and the two parts can be relatively stretched through the spline pair.

The process of piercing is: the heating furnace heats the solid tube blank to about 1250 °C, and transports it to the front of the piercing machine. Rolling, the tube blank is rolled into a hollow tube (about 5-10 meters in length) in the tool cavity formed by the upper and lower rolls, left and right guide plates, and tapered plug. After the piercing is completed, the first section of the backstage transports the hollow tube out of the piercer, and the hollow tube is blocked by the pipe release card at the end of the transport roller table. The machine is horizontally dialed out to the background for a while. The ejector rod drives the plug back to the plug cooling device after the tube card is removed to cool the plug or replace the plug through the plug circulation replacement device. After the plug is cooled or replaced, the ejector pin moves forward again to start a new round of piercing process.

The roll is the main tool and die for piercing and deformation. It endures high temperature and high pressure during work, and its surface is severely worn. It needs to be replaced after every 1 to 2 weeks of work. When replacing the roll, it is necessary to support the main drive shaft of the roll with a support device, manually remove the connecting bolts between the front end of the main drive shaft and the tail of the roll, and then disengage the main drive shaft by 400-500mm backward, and lift the old roll with a crane. Take it out, put in a new roll, push the main drive shaft forward and connect it with the end of the roll.

The existing support device for the main transmission shaft of the punching machine is a U-shaped bracket arranged in the middle of the shaft that can be lifted and pushed back and forth. The base of the shaft support device is arranged on the side of the main transmission shaft in order to avoid the equipment in the background section of the punching machine. Several guide rods and carriages are installed on the base. U-shaped brackets and lifting cylinders are installed on the carriage. The carriage is composed of The push-pull hydraulic cylinder drives the slide back and forth. When changing rolls, the U-shaped bracket is raised by the lifting hydraulic cylinder to hold the main shaft and just clamp the disc in the middle of the main shaft, and then push and pull the hydraulic cylinder to drive the carriage forward and backward, thereby driving the main shaft to expand and contract. The whole device is arranged eccentrically, only the U-shaped bracket protrudes below the disk in the middle of the main shaft. When the push-pull hydraulic cylinder drives the carriage forward and backward, the carriage is often stuck on the guide rod due to the uneven load. It is necessary to manually intervene repeatedly, resulting in longer roll change time and lower roll change efficiency.

Utility model content

In view of this, the purpose of the utility model is to provide a roll changing device for a piercing machine, so as to improve the roll changing efficiency.

In order to achieve the above object, the utility model provides the following technical solutions:

A roll changing device for a piercing machine, comprising a support device and a disengagement device arranged directly under the main drive shaft and arranged in front and back; the support device includes a lifting idler, and the lifting idler has a position-limiting structure to limit the main drive shaft. The axial position of the lifting roller is connected with a lifting drive device, and the lifting driving device drives the lifting roller to rise to support the main drive shaft; the disengaging device includes a shift fork set at the position of the telescopic spline of the main drive shaft, and the fork of the shift fork There are rollers on both sides of the opening opposite to each other. The handle of the shift fork is hinged on the base of the release device, and the base of the release device is provided with a drive mechanism for the shift fork. The two rollers work with the front and rear push discs arranged at the telescopic splines of the main drive shaft to move the main drive shaft to expand and contract.

Optionally, the action points of the two rollers and the forward-pushing disk and the backward-pushing disk are center-symmetrical with respect to the centerline of the main transmission shaft.

Optionally, the fork of the shift fork is U-shaped or V-shaped.

Optionally, the lifting drive device is a swing device, and the swing device includes a swing rod fixedly connected to the lifting idler and arranged perpendicular to the lifting idler, and the other end of the swing rod is hinged by a rotating shaft parallel to the lifting idler. On the base of the supporting device, the rotating shaft is connected with a rotating shaft driving device for driving its rotation, and the base of the supporting device is fixed on the ground foundation.

Optionally, the rotating shaft driving device is driven by hydraulic pressure or electric motor.

Optionally, the lifting drive device is a vertical lifting device, and the vertical lifting device is a jacking hydraulic cylinder or a screw nut transmission mechanism driven by a motor.

Optionally, the shift fork driving mechanism includes a linear hydraulic cylinder arranged on the base of the release device, the output end of the linear hydraulic cylinder is hinged with a bayonet pin, and the bayonet pin is located at the shift fork handle and along the length direction of the shift fork handle. The elongated limiting holes provided are slidingly connected, and the two ends of the bayonet pin are provided with limiting structures to prevent slipping from the limiting holes.

Optionally, the push-forward disk and the push-back disk are integrally welded to the telescopic shaft section of the main transmission shaft.

Optionally, the limiting structure is in a concave arc or V shape.

Optionally, the elevating idler roller is a tapered diameter shaft with large ends and a small middle, so as to form a limiting structure through the circumferential surface of the elevating idler roller.

The beneficial effect of the utility model is that: the main drive shaft supporting device and the disengagement device are separated, the disengagement device is arranged at the middle and rear part of the main drive shaft, just below the telescopic spline pair, and the shift fork drive of the disengagement device adopts The swing arm structure avoids the unbalanced load and jamming of the existing side carriage structure; when the roller inside the fork fork moves the main transmission shaft to expand and contract, the center of the force is consistent with the direction of the shaft's expansion and contraction, which can effectively Reduce the jamming from the spline pair and reduce the roll changing time of the piercer.

Other advantages, objectives and features of the present utility model will be set forth in the following description to some extent, and to some extent, based on the investigation and research below, it will be obvious to those skilled in the art, or can be Get teaching from the practice of the utility model. The objectives and other advantages of the utility model can be realized and obtained through the following description.

Description of drawings

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is a structural schematic diagram one of the utility model roll changing device;

Fig. 2 is the structure schematic diagram two of the utility model roll changing device;

Fig. 3 is the structural representation of supporting device;

Fig. 4 is a structural schematic diagram of the disengaging device.

Reference signs: upper roller 1, main drive shaft 2, reducer 3, motor 4, support device 5, disengagement device 6, lower roller 7, rear push disc 8, forward push disc 9, lift roller bearing seat 10. Lifting roller 11, lifting roller drive hydraulic cylinder 12, support device base 13, roller 14, shift fork 15, shift fork bearing seat 16, shift fork drive hydraulic cylinder 17, release device base 18.

Detailed ways

The implementation of the present utility model is described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The utility model can also be implemented or applied through other different specific implementation modes, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the illustrations provided in the following embodiments are only schematically illustrating the basic idea of the present utility model, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

Wherein, accompanying drawing is only used for exemplary illustration, what represent is only schematic diagram, rather than actual figure, can not be interpreted as the restriction to the present utility model; The omission, enlargement or reduction does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

In the accompanying drawings of the utility model embodiment, the same or similar symbols correspond to the same or similar parts; The orientation or positional relationship indicated by "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the referred device Or elements must have a specific orientation, structure and operation with a specific orientation, so the terms describing the positional relationship in the drawings are only for illustrative purposes, and cannot be understood as limitations on the present utility model. For those of ordinary skill in the art , the specific meanings of the above terms can be understood according to specific situations.

Referring to accompanying drawings 1 to 4, a roll changing device for a piercing machine includes a supporting device 5 and a disengaging device 6 arranged directly under the main transmission shaft 2 and arranged in front and back; the supporting device 5 includes a The lifting idler 11 directly below, the lifting idler 11 has a limit structure to limit the axial position of the main transmission shaft 2, the lifting idler 11 is connected with a lifting drive device, and the lifting drive drives the lifting idler 11 to rise to support the main transmission Shaft 2; disengagement device 6 includes a shift fork 15 which is arranged at the position of the telescopic spline facing the main drive shaft 2, rollers 14 are arranged on the inner sides of the fork of the shift fork 15, and the handle of the shift fork 15 is hinged on the disengagement device. On the base 18, a shift fork driving mechanism is provided on the disengagement device base 18, and the shift fork driving mechanism drives the shift fork 15 to swing at a certain angle around its hinge center, so as to pass through the two rollers 14 and be arranged on the telescopic spline of the main transmission shaft 2 and The forward pushing disc 9 and the backward pushing disc 8 that are arranged in front and back act to stir the main transmission shaft 2 to expand and contract. The fork of shift fork 15 can be U-shaped or V-shaped, so that roller 14 is installed and is advisable.

The utility model adopts a separate support device 5 and a disengagement device 6, the disengagement device 6 is arranged directly below the telescopic spline pair, and the shift fork drive of the disengagement device 6 adopts a swing arm structure, which avoids the existing side carriage Offset loading and jamming of structures.

In order to make the roller 14 move the main drive shaft 2 to expand and contract, the center of the force is consistent with the direction of the axis, and to reduce the jamming from the spline pair. The action points of the push discs 8 are centrally symmetrical about the center line of the main transmission shaft 2 .

The lifting drive device of the present utility model can be a swing device, and the swing device includes a swing rod fixedly connected with the lift roller 11 and arranged vertically with the lift roller 11 to form a swing arm structure. The rotating shaft that roller 11 is arranged in parallel is hinged on the support device base 13, and the rotating shaft is connected with the rotating shaft driving device that drives its rotation, and the supporting device base 13 is fixed on the ground foundation; The rotating shaft driving device can be hydraulic drive or motor drive.

The lifting drive device of the present utility model can also be a vertical lifting device, and the vertical lifting device can be a jacking hydraulic cylinder or a screw nut transmission mechanism driven by a motor.

The shift fork driving mechanism of the present utility model includes a linear hydraulic cylinder arranged on the base 18 of the disengaging device. The output end of the linear hydraulic cylinder is hinged with a bayonet pin. The elongated limiting hole is slidingly connected, and the two ends of the bayonet pin are provided with limiting structures to prevent slipping from the limiting hole.

The forward pushing disk 9 and the backward pushing disk 8 of the utility model are welded together with the telescopic shaft section of the main transmission shaft 2, and other fixed connection methods can also be adopted. The limiting structure can be in concave arc or V shape. The limit structure can be formed by the circumferential surface of the lifting idler 11, for example, the circumferential surface of a tapered radial axis with large ends at both ends and a small middle can form a limit structure.

Example

A roll changing device for a piercing machine, see accompanying drawing 1, including a supporting device and a disengaging device, which is arranged at the background of the piercing machine; an upper roll main transmission system of the piercing machine includes an upper roll 1, a main transmission shaft 2, a deceleration The machine 3 and the motor 4, the upper roll 1 and the lower roll 7 form a certain angle; in Figure 1, A is at the rear of the main drive shaft, B is at the telescopic spline of the main drive shaft, C is at the middle of the main drive shaft, and D is at the middle of the main drive shaft. The connection position between the front of the main drive shaft and the tail of the roll; at the middle position C of the main drive shaft 2, set the supporting device 5 of the main drive shaft 2; at the position B of the telescopic spline pair of the main drive shaft 2, set the main drive Release device 6 for shaft 2.

Referring to accompanying drawings 1 and 2, at position B of the telescopic spline pair of the main drive shaft 2, a push-back disc 8 and a push-forward disc 9 are provided, which are welded integrally with the telescopic part of the main drive shaft 2 .

Supporting device 5: see attached drawings 2 and 3, it is arranged in the middle of the main drive shaft 2, and the lifting idler 11 is driven by a hydraulic cylinder. Contact, when changing the roller, the hydraulic cylinder drives the lifting idler roller 11 to rise, supporting the main drive shaft 2. Its specific structure is as follows: the lifting roller 11 is a swing arm structure, the swing arm is installed on the lifting roller bearing seat 10 through a sliding rotation pair, and the swing arm is driven by the lifting roller driving hydraulic cylinder 12 around the lifting roller bearing seat 10. Center rotation can realize the up and down lifting of the lifting idler roller 11, and the lifting idler roller bearing block 10 and the lifting idler roller drive hydraulic cylinder 12 are all installed on the supporting device base 13.

Disengagement device 6: refer to accompanying drawings 2 and 4, it is arranged in the middle and rear of the main transmission shaft 2, located directly below the position of the telescopic spline of the main transmission shaft 2, and uses a hydraulic cylinder to drive the dial of the U-shaped fork The fork 15 swings, and the specific structure is as follows: the shift fork 15 is a swing arm structure, the swing arm is installed on the shift fork bearing seat 16 through a sliding rotation pair, and the swing arm is driven by the shift fork driving hydraulic cylinder 17, which can realize the forward and backward movement of the shift fork 15. Swing, a roller 14 is installed inside the fork of the shift fork 15, the center of the roller 14 roughly coincides with the center of the main transmission shaft 2; when the punching machine is working, the roller 14 is in the middle of the two discs, and does not touch the discs ; The shift fork bearing seat 16 and the shift fork drive hydraulic cylinder 17 are installed on the base 18 of the disengaging device.

The specific operation method of this embodiment is: when the roll of the piercing machine needs to be replaced, the lifting roller driven by the support device 5 drives the hydraulic cylinder 12 to drive the lifting roller 11 to rise, supports the main transmission shaft 2, and manually removes the main transmission shaft The front part of 2 and the connecting bolt at the tail of upper roll 1, the drive shift fork of the main drive shaft disengagement device 6 drives the hydraulic cylinder 17 to drive the shift fork 15 to swing backward, and the roller 14 pushes the disc 8 after turning to push the main drive shaft 2. The retractable front and middle parts are retracted and the tail of the upper roll 1 is disengaged to replace the rolls, and then the fork is driven to drive the hydraulic cylinder 17 to drive the fork 15 to swing forward, and the roller 14 is moved to push the disc 9 forward to push the main The telescopic front part and the middle part of transmission shaft 2 advance, and the last roll 1 tail is moved closer, and the connecting bolts of the main drive shaft 2 heads and the upper roll 1 tail are manually connected, and the main drive shaft 2 is connected with the tail of the upper roll 1. The lifting idler 11 of the support device 5 descends and does not contact the main transmission shaft 2. The shift fork 15 of the main transmission shaft disengagement device 6 swings backward at a certain angle, and the roller 14 and the rear push disc 8 of the main transmission shaft 2 and the front Push away disc 9 all in non-contact state, promptly finished a cycle process of perforator roll replacement.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the spirit and scope of the technical solutions shall be covered by the claims of the present utility model.

Claims (10)

1. A roll changing device for a perforating machine, characterized in that: comprises a supporting device and a disengaging device which are arranged under a main transmission shaft and are arranged in front and back; the supporting device comprises a lifting carrier roller, the lifting carrier roller is provided with a limiting structure to limit the axial position of the main transmission shaft, the lifting carrier roller is connected with a lifting driving device, and the lifting driving device drives the lifting carrier roller to ascend to support the main transmission shaft; the disengaging device comprises a shifting fork which is just opposite to the position of the telescopic spline of the main transmission shaft, the inner sides of two sides of a fork opening of the shifting fork are relatively provided with idler wheels, a handle part of the shifting fork is hinged on a disengaging device base, a shifting fork driving mechanism is arranged on the disengaging device base, the shifting fork driving mechanism drives the shifting fork to swing by a certain angle around a hinge center of the shifting fork, and the main transmission shaft is stirred to stretch under the action of a front pushing disc and a rear pushing disc which are arranged at the position of the telescopic spline of the main transmission shaft and arranged front and back through the two idler wheels.

2. The roll changing device for a piercing mill according to claim 1, wherein: the action points of the two rollers and the forward pushing disc and the backward pushing disc are centrosymmetric about the central line of the main transmission shaft.

3. The roll changing device for a piercing mill according to claim 1, wherein: and the fork opening of the shifting fork is U-shaped or V-shaped.

4. The roll changing device for a piercing mill according to claim 1, wherein: the lifting driving device is a swinging device, the swinging device comprises a swinging rod which is fixedly connected with the lifting carrier roller and is vertically arranged with the lifting carrier roller, the other end of the swinging rod is hinged on a supporting device base through a rotating shaft which is arranged in parallel with the lifting carrier roller, the rotating shaft is connected with a rotating shaft driving device which drives the rotating shaft driving device to rotate, and the supporting device base is fixed on a ground foundation.

5. The roll changing device for a piercing mill according to claim 4, wherein: the rotating shaft driving device is driven by hydraulic pressure or a motor.

6. The roll changing device for a piercing mill according to claim 1, wherein: the lifting driving device is a vertical lifting device, and the vertical lifting device is a jacking hydraulic cylinder or a lead screw nut transmission mechanism driven by a motor.

7. The roll changing device for a piercing mill according to claim 1, wherein: the shifting fork driving mechanism comprises a linear hydraulic cylinder arranged on a base of the disengaging device, the output end of the linear hydraulic cylinder is hinged with a clamping pin, the clamping pin is in sliding connection with a limiting hole which is located on the shifting fork handle portion and is long in strip shape and is arranged along the length direction of the shifting fork handle portion, and the two ends of the clamping pin are provided with limiting structures to prevent slipping from the limiting hole.

8. The roll changing device for the perforating machine as claimed in claim 1, characterized in that: the forward push disc and the backward push disc are welded with the telescopic shaft section of the main transmission shaft into a whole.

9. The roll changing device for a piercing mill according to claim 1, wherein: the limiting structure is in an inwards concave arc shape or V shape.

10. The roll changing device for a piercing mill according to claim 1, wherein: the lifting carrier roller is a tapered shaft with two large ends and a small middle part, and a limiting structure is formed by the circumferential surface of the lifting carrier roller.

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