Welding bed tailstock capable of continuously keeping clamping

Abstract

The utility model belongs to the technical field of continuous casting roller welding, and particularly relates to a welding machine tailstock capable of continuously keeping clamping, which comprises a tailstock lower part. The worm reducer drives the lead screw to drive the movable nut, so that the upper tailstock body moves forwards to clamp a roller sleeve needing to be welded under the constraint of the linear bearing and the cylindrical guide rail, when the welded roller sleeve is loosened, the worm reducer rotates reversely to drive the upper tailstock body to move backwards to loosen the welded roller sleeve, and the automatic clamping function of the welded roller sleeve is achieved. When the roller sleeve is clamped and welded, the live center and the tailstock sleeve can move backwards to enable the belleville spring set to generate pre-pressure, in the surfacing process of the roller sleeve, linear expansion can be generated in an inner hole of the roller sleeve and the axial length direction along with temperature rise of the roller sleeve, and the live center and the tailstock sleeve enable clamping force to be maintained within a certain range under the pre-pressure effect of the belleville spring set. And the clamping state is continuously kept, so that the roller sleeve is effectively clamped without losing rotation, the damage to equipment caused by linear expansion in the axial direction is eliminated, and the deformation of a tailstock of a welding machine is reduced.

Description

Technical Field

[0001] This utility model relates to the field of continuous casting roll welding technology, specifically a welding bed tailstock that maintains continuous clamping. Background Technology

[0002] In the metal processing industry, the tailstock of a welding machine, as a crucial component of welding equipment, is responsible for fixing and supporting the workpiece, ensuring its stable and accurate positioning during welding. This is particularly true in the welding of continuous casting roll sleeves, where the stability and clamping force of the tailstock are critical to weld quality. Currently available tailstock designs typically fix the axial position of the live center after workpiece adjustment. While this design theoretically meets the needs of general welding operations, it reveals significant problems in practical applications, especially in the welding of continuous casting roll sleeves.

[0003] During the welding process of continuous casting roll sleeves, significant thermal expansion occurs due to the heat input. This thermal expansion causes the inner diameter of the sleeve to increase, gradually creating a gap between the inner diameter, which was originally tightly fitted with the live center, and the live center. As the gap increases, the synchronization between the continuous casting roll sleeve and the headstock during rotation is disrupted, and the rotation speed becomes inconsistent. When the gap reaches a certain level, the continuous casting roll sleeve may even completely lose its rotational ability and become stationary. This situation not only seriously affects the smooth progress of the welding process but may also lead to a decline in the quality of the weld joint, resulting in welding defects such as incomplete fusion and slag inclusions. In more severe cases, it may even directly cause the welding operation to fail, wasting materials and time and increasing production costs. Therefore, we propose a continuously clamped tailstock to solve the above problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a welding bed tailstock that maintains continuous clamping, thus solving the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] A welding machine tailstock that maintains continuous clamping includes a lower tailstock body. Two side plates are fixedly connected to the top of the lower tailstock body. A worm gear reducer is fixedly connected to one side of one of the side plates. A lead screw is rotatably connected between the two side plates. The end of the lead screw extends beyond one of the side plates and is fixedly connected to the output shaft of the worm gear reducer. A movable nut is threaded onto the lead screw. An upper tailstock body is fixedly connected to the top of the movable nut. Two cylindrical guide rails are fixedly connected between the two side plates, and the cylindrical guide rails are slidably connected... The device includes a linear bearing, the top of which is fixedly connected to the bottom of the upper body of the tailstock. The upper body of the tailstock is provided with a tailstock sleeve, and the tailstock sleeve is provided with a live center. The upper body of the tailstock is provided with a butterfly spring assembly, which cooperates with the tailstock sleeve and the live center. A support plate is welded to the left side of the lower body of the tailstock, and a screw is rotatably connected to the support plate. A moving rod is threaded onto the screw, and a pressure plate is fixedly connected to the end of the moving rod. A knob is welded to the top of the screw. The bottom of the lower body of the tailstock is provided with an I-beam track and an inverted V-shaped track.

[0009] Furthermore, two guide rods are welded to the bottom of the support plate, and a limit rod is slidably connected to the guide rod. The bottom end of the limit rod is fixedly connected to the top of the pressure plate.

[0010] Furthermore, the movable rod has a threaded hole, and the movable rod is threadedly connected to the screw through the threaded hole.

[0011] Furthermore, a V-shaped groove is provided at the bottom of the lower part of the tailstock, and the lower part of the tailstock is slidably connected to the inverted V-shaped track through the V-shaped groove.

[0012] Furthermore, the bottom of the pressure plate is in active contact with the bottom inner wall of the inverted V-shaped track and the I-shaped track.

[0013] Furthermore, a limiting hole is provided on the limiting rod, and the limiting rod is slidably connected to the corresponding guide rod through the limiting hole.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a welding bed tailstock that maintains continuous clamping, which has the following beneficial effects:

[0016] This invention achieves automatic clamping of the welding roller sleeve by using a worm gear reducer to drive a lead screw to move the lead screw nut when clamping the welding roller sleeve. This causes the upper body of the tailstock to move forward under the constraint of a linear bearing and a cylindrical guide rail, clamping the roller sleeve to be welded. When releasing the welding roller sleeve, the worm gear reducer reverses its rotation, driving the upper body of the tailstock to move backward and release the welding roller sleeve. During clamping, the movable center and tailstock sleeve move backward, causing the disc spring assembly to generate preload. During the welding process, as the temperature rises, the inner hole and axial length of the roller sleeve... The axial expansion will cause linear expansion. Under the pre-pressure of the butterfly spring group, the clamping force of the live center and tailstock sleeve is maintained within a certain range and the clamping state is maintained continuously to ensure that the roller sleeve is effectively clamped and does not lose rotation and to eliminate the damage caused by the linear expansion in the axial direction to the equipment. Generally, for rollers with small inner holes, the axial expansion is large. If it is a traditional welding bed tailstock, the axial force will be particularly large. However, the welding bed tailstock of this device will eliminate most of the axial force due to the action of the butterfly spring group, thereby reducing the deformation of the welding bed tailstock. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a partial three-dimensional structural diagram of the present invention;

[0019] Figure 3 This is a three-dimensional structural diagram of the upper body of the tailstock of this utility model cut open;

[0020] Figure 4 This is a schematic diagram of the connection structure of the screw, pressure plate, knob and guide rod of this utility model.

[0021] In the diagram: 1. Tailstock lower body; 2. Side plate; 3. Worm gear reducer; 4. Lead screw; 5. Moving lead screw nut; 6. Tailstock upper body; 7. Cylindrical guide rail; 8. Linear bearing; 9. Limiting rod; 10. Tailstock sleeve; 11. Live center; 12. Butterfly spring assembly; 13. I-beam track; 14. Inverted V-shaped track; 15. Support plate; 16. Screw; 17. Moving rod; 18. Pressure plate; 19. Knob; 20. Guide rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example

[0024] like Figure 1-4 As shown in the figure, an embodiment of the present invention provides a welding machine tailstock that maintains continuous clamping, comprising a lower tailstock body 1, two side plates 2 fixedly connected to the top of the lower tailstock body 1, a worm gear reducer 3 fixedly connected to one side of one of the side plates 2, a lead screw 4 rotatably connected between the two side plates 2, the end of the lead screw 4 extending outside one of the side plates 2 and fixedly connected to the output shaft of the worm gear reducer 3, a movable nut 5 threadedly connected to the lead screw 4, an upper tailstock body 6 fixedly connected to the top of the movable nut 5, and two cylindrical guide rails 7 fixedly connected between the two side plates 2. A linear bearing 8 is slidably connected to the cylindrical guide rail 7. The top of the linear bearing 8 is fixedly connected to the bottom of the tailstock upper body 6. A tailstock sleeve 10 is provided on the tailstock upper body 6, and a live center 11 is provided on the tailstock sleeve 10. A butterfly spring assembly 12 is provided inside the tailstock upper body 6. The butterfly spring assembly 12 cooperates with the tailstock sleeve 10 and the live center 11. A support plate 15 is welded to the left side of the tailstock lower body 1. A screw 16 is rotatably connected to the support plate 15. A moving rod 17 is threadedly connected to the screw 16. A pressure plate 18 is fixedly connected to the end of the moving rod 17. A knob 19 is welded to the top of the screw 16. The bottom of the tailstock lower body 1 is equipped with an I-beam track 13 and an inverted V-shaped track 14. When clamping the welding roller sleeve, the worm gear reducer 3 drives the lead screw 4 to move the lead screw nut 5, causing the tailstock upper body 6 to move forward under the constraint of the linear bearing 8 and the cylindrical guide rail 7 to clamp the roller sleeve to be welded. When releasing the welding roller sleeve, the worm gear reducer 3 rotates in the reverse direction, driving the tailstock upper body 6 to move backward to release the welding roller sleeve, realizing the automatic clamping function of the welding roller sleeve. When clamping the welding roller sleeve, the live center 11 and the tailstock sleeve 10 will move backward, causing the disc spring assembly 12 to generate preload. During the welding process, the roller sleeve, with the temperature... The raising of the inner hole and axial length of the roller sleeve will cause linear expansion. Under the pre-pressure of the butterfly spring group 12, the live center 11 and the tailstock sleeve 10 maintain the clamping force within a certain range and continue to maintain the clamping state to ensure that the roller sleeve is effectively clamped without slippage and to eliminate the damage caused by the linear expansion in the axial direction to the equipment. Generally, for rollers with smaller inner holes, the axial expansion is larger. If it is a traditional welding bed tailstock, the axial force will be particularly large. However, the welding bed tailstock of this device will eliminate most of the axial force due to the action of the butterfly spring group 12, thereby reducing the deformation of the welding bed tailstock.

[0025] In some embodiments, two guide rods 20 are welded to the bottom of the support plate 15, and a limit rod 9 is slidably connected to the guide rod 20. The bottom end of the limit rod 9 is fixedly connected to the top of the pressure plate 18.

[0026] In some embodiments, the movable rod 17 is provided with a threaded hole, and the movable rod 17 is threadedly connected to the screw 16 through the threaded hole. The movable rod 17 serves as a connection.

[0027] In some embodiments, a V-shaped groove is provided at the bottom of the tailstock lower body 1, and the tailstock lower body 1 is slidably connected to the inverted V-shaped track 14 through the V-shaped groove.

[0028] In some embodiments, the bottom of the pressure plate 18 is in active contact with the bottom inner wall of the inverted V-shaped track 14 and the I-beam track 13.

[0029] In some embodiments, a limiting hole is provided on the limiting rod 9, and the limiting rod 9 is slidably connected to the corresponding guide rod 20 through the limiting hole. The setting of the limiting rod 9 plays a limiting role.

[0030] The working principle or structural principle is as follows: When clamping the welding roller sleeve, the worm gear reducer 3 drives the lead screw 4 to move the lead screw nut 5, causing the tailstock upper body 6 to move forward under the constraint of the linear bearing 8 and the cylindrical guide rail 7 to clamp the roller sleeve to be welded. When releasing the welding roller sleeve, the worm gear reducer 3 rotates in the reverse direction, driving the tailstock upper body 6 to move backward to release the welding roller sleeve, thus realizing the automatic clamping function of the welding roller sleeve. When clamping the welding roller sleeve, the live center 11 and the tailstock sleeve 10 will move backward, causing the disc spring group 12 to generate preload. During the welding process, as the temperature rises, the inner hole and axial length of the roller sleeve will undergo linear expansion. Under the preload of the disc spring group 12, the live center 11 and the tailstock sleeve 10 maintain the clamping force within a certain range and continuously maintain the clamping state to ensure that the roller sleeve is effectively clamped. This device eliminates the damage caused by axial linear expansion to the equipment, which is generally more harmful to rollers with smaller inner holes. In general, the axial expansion is larger for rollers with smaller inner holes. If it is a traditional welding machine tailstock, the axial force will be particularly large. However, the welding machine tailstock of this device eliminates most of the axial force due to the action of the butterfly spring group 12, thereby reducing the deformation of the welding machine tailstock. When the size changes greatly, the knob 19 is turned. The knob 19 drives the moving rod 17 to move through the screw 16. The moving rod 17 drives the pressure plate 18 to move downward. The pressure plate 18 drives the limit rod 9 to slide on the corresponding guide rod 20, so that the pressure plate 18 fixes the lower body 1 of the tailstock on the I-beam track 13 and the inverted V-shaped track 14. Small size adjustments and clamping are made by the worm gear reducer 3 driving the lead screw 4, etc. The butterfly spring group 12 is subjected to a certain pressure to achieve the clamping effect.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A continuously clamped welding bed tailstock, comprising a tailstock lower body (1), characterized in that: The top of the tailstock lower body (1) is fixedly connected with two side plates (2), one side of one of the two side plates (2) is fixedly connected with a worm reducer (3), a lead screw (4) is rotatably connected between the two side plates (2), the end of the lead screw (4) extends out of one of the two side plates (2) and is fixedly connected with the output shaft of the worm reducer (3), a movable nut (5) is threadedly connected on the lead screw (4), a tailstock upper body (6) is fixedly connected to the top of the movable nut (5), two cylindrical guide rails (7) are fixedly connected between the two side plates (2), a linear bearing (8) is slidably connected on the cylindrical guide rail (7), the top of the linear bearing (8) is fixedly connected with the bottom of the tailstock upper body (6), a tailstock sleeve (10) is arranged on the tailstock upper body (6), a live center (11) is arranged on the tailstock sleeve (10), a butterfly spring set (12) is arranged in the tailstock upper body (6), the butterfly spring set (12) cooperates with the tailstock sleeve (10) and the live center (11), a support plate (15) is welded to the left side of the tailstock lower body (1), a screw rod (16) is rotatably connected on the support plate (15), a movable rod (17) is threadedly connected on the screw rod (16), a pressing plate (18) is fixedly connected to the end of the movable rod (17), a knob (19) is welded to the top end of the screw rod (16), a I-shaped rail (13) and an inverted V-shaped rail (14) are arranged at the bottom of the tailstock lower body (1).

2. A sustained clamping welding bed tailstock according to claim 1, characterized in that: Two guide rods (20) are welded to the bottom of the support plate (15), a limiting rod (9) is slidably connected on the guide rod (20), the bottom end of the limiting rod (9) is fixedly connected with the top of the pressing plate (18).

3. A sustained clamping welding bed tailstock according to claim 2, characterised in that: Threaded holes are formed in the movable rod (17), and the movable rod (17) is threadedly connected with the screw rod (16) through the threaded holes.

4. A sustained clamping welding bed tailstock according to claim 3, wherein: A V-shaped groove is formed in the bottom of the tailstock lower body (1), and the tailstock lower body (1) is slidably connected with the inverted V-shaped rail (14) through the V-shaped groove.

5. A sustained clamping welding bed tailstock according to claim 4, characterised in that: The bottom of the pressing plate (18) is in movable contact with the inner walls of the bottom of the inverted V-shaped rail (14) and the I-shaped rail (13).

6. A sustained clamping welding bed tailstock according to claim 5, characterised in that: Limiting holes are formed in the limiting rod (9), and the limiting rod (9) is slidably connected with the corresponding guide rod (20) through the limiting holes.

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