Inner surface welding device and technology for production and machining of self-lubricating shaft sleeve

Abstract

The invention discloses an inner surface welding device and technology for self-lubricating shaft sleeve production and machining, and relates to the technical field of self-lubricating shaft sleeves. The welding device comprises a welding box, and a workbench is fixedly arranged on one side of the welding box; a material opening is formed in the box wall, close to the workbench, of the welding box, and a sealing plate is embedded in the material opening in a sliding mode and connected with an elastic module arranged in the welding box. A first air pump used for conveying nitrogen into the welding box is further fixedly arranged on the outer side of the welding box. A feeding table is arranged on the workbench in a sliding mode, and the feeding table is connected with a driving module driving the feeding table to move in the direction close to or away from the welding box. A material groove is formed in the feeding table. A limiting column is coaxially arranged in the material groove, and a bearing ring is embedded between the limiting column and the groove wall of the material groove; when the feeding table completing feeding is pushed into the welding box from the material opening, nitrogen in the welding box cannot leak from a gap between the material groove and the annular groove.

Description

Technical Field

[0001] The present invention relates to the technical field of self-lubricating bushings, and particularly relates to an inner surface welding device and process for the production and processing of self-lubricating bushings. Background Art

[0002] A self-lubricating bushing, also known as a self-lubricating sleeve or a non-lubricated bearing, is a type of sliding bearing. Its materials are mostly plastics, carbon graphite, metal composites, etc., and it can work without lubricating oil or grease. The self-lubricating effect is usually achieved by solid lubricants embedded in the matrix, so it is also called a solid lubrication bearing.

[0003] In order to improve the stiffness or sealing performance of the self-lubricating bushing, it is usually necessary to weld structures such as a reinforcing ring or a sealing ring on its inner surface. During the welding process, the temperature of the inner surface of the self-lubricating bushing will rise sharply. If exposed to air, the metal surface will react with oxygen to form oxides. For example, copper-based or steel-based self-lubricating bushings will react with oxygen in the air at high temperatures to form oxides such as copper oxide and iron oxide. These oxides will not only reduce the strength and density of the welded joint, but may also cause defects such as cracks and pores in the welded part, seriously affecting the service performance and life of the bushing.

[0004] Nitrogen is an inert gas with stable chemical properties and is not easily chemically reacted with other substances during the welding process. Filling nitrogen into the welding area can effectively isolate the air, reduce the oxygen content to an extremely low level, thereby preventing the metal surface from being oxidized at high temperatures, ensuring the metal purity of the welded part, and improving the welding quality.

[0005] In the actual application process, since the self-lubricating bushings are mass-produced, during the welding process, it is necessary to frequently load and unload. However, during the loading and unloading process, in order to avoid nitrogen leakage or waste in the welding box, during each loading and unloading process, it is necessary to use an air pump to extract the nitrogen in the welding box. Before the next group of welding, it is also necessary to evacuate the welding box and fill it with nitrogen, and the process is relatively cumbersome. Summary of the Invention

[0006] The purpose of the present invention is to provide an inner surface welding device and process for the production and processing of self-lubricating bushings, and solve the following technical problems: During the loading and unloading process of the self-lubricating bushing, it is necessary to extract nitrogen from the welding box, which is rather troublesome.

[0007] The purpose of the present invention can be achieved by the following technical solutions: An inner surface welding device for the production and processing of self-lubricating bushings includes a welding box, and a workbench is fixedly arranged on one side of the welding box; On the box wall of the welding box facing the workbench, a material opening is provided. A sealing plate is slidably embedded in the material opening, and the sealing plate is connected to an elastic module arranged in the welding box. A first air pump for conveying nitrogen into the welding box is also fixedly arranged outside the welding box. A loading table is slidably arranged on the workbench, and the loading table is connected to a driving module that drives it to move towards or away from the welding box. A material groove is provided on the loading table. A limiting column is coaxially arranged in the material groove. A bearing ring is embedded between the limiting column and the groove wall of the material groove. A positioning groove for embedding a self-lubricating bushing is formed by enclosing between the bearing ring, the limiting column, and the groove wall of the material groove. An annular groove for embedding a welding ring is provided at the top of the limiting column, and the limiting column is connected to a lifting module that drives its lifting and lowering. A welding module is also arranged inside the welding box for welding the welding ring to the inner surface of the self-lubricating bushing.

[0008] Preferably, a baffle is fixedly arranged on the box wall above the outside of the material opening.

[0009] Preferably, the driving module includes a driving mechanism fixed on one side of the workbench, and the driving end of the driving mechanism is fixed to the loading table.

[0010] Preferably, the bearing ring is slidably arranged in the material groove. Among them, a plurality of groups of bearing seats for supporting the bearing ring are fixedly arranged in a circumferential array on the groove wall in the material groove.

[0011] Preferably, the lifting module includes a guide wheel rotatably arranged at the bottom of the limiting column. Among them, a wedge-shaped seat is slidably arranged in the material groove. An inclined guide surface for supporting the guide wheel is provided on the wedge-shaped seat, and the wedge-shaped seat is connected to an adjusting mechanism that drives it to move towards or away from the axis center.

[0012] Preferably, one side of the wedge-shaped seat away from the axis center of the material groove is fixed to a first guide rod slidably inserted into the loading table. The first guide rod extends outside the loading table, and the end of the first guide rod away from the wedge-shaped seat is fixed to a limiting plate. A first spring is arranged on the first guide rod. Among them, a first partition plate is fixedly arranged on one side of the material opening.

[0013] Preferably, a connecting frame is fixedly arranged on the side of the first partition plate away from the welding box, and a second partition plate parallel to the first partition plate is fixedly arranged at the end of the connecting frame.

[0014] Preferably, the elastic module includes two groups of second guide rods fixed in the welding box. A sliding seat fixed to the sealing plate is slidably arranged on the second guide rods, and a second spring is arranged on the second guide rods.

[0015] Preferably, the welding module includes a lifting mechanism fixed in the welding box. The driving end of the lifting mechanism is fixed to the horizontal mechanism. The driving end of the horizontal mechanism is connected to the rotating mechanism. The driving end of the rotating mechanism is fixed to the welding head.

[0016] An inner surface welding process for the production and processing of self-lubricating bushings, which is applied to an inner surface welding device for the production and processing of self-lubricating bushings as described in any one of the claims, includes the following steps: The first air pump conveys nitrogen into the welding box. Embed the self-lubricating bushing into the positioning groove and embed the welding ring into the annular groove. The driving module drives the loading table to move towards the welding box. During the movement, the loading table first contacts the sealing plate. As the loading table continues to move, it pushes the sealing plate into the welding box. The sealing plate can compress the elastic module and generate elastic force. After the loading table completely enters the welding box, the side wall of the loading table close to the workbench is embedded into the material inlet to seal the material inlet. The lifting module drives the limit post to descend to a preset height. When the limit post descends, it can drive the welding ring to descend synchronously, so that the welding ring descends to the position to be welded with the self-lubricating bushing. The welding module welds the welding ring and the self-lubricating bushing. After welding is completed, the driving module pushes the loading table out of the material inlet. During the pushing process, the elastic module drives the sealing plate to reset and embed into the material inlet through the elastic force, realizing the re-sealing of the material inlet.

[0017] Advantages of the present invention: (1) In the initial state of the present invention, the top end of the limit post is flush with the top surface of the loading table. After embedding the self-lubricating bushing into the positioning groove and the welding ring into the annular groove, at this time, the top surfaces of the self-lubricating bushing and the welding ring are both flush with the loading table, and the self-lubricating bushing is in close contact with the groove wall of the material groove and the limit post, and the welding ring is in close contact with the groove wall of the annular groove and the self-lubricating bushing. Therefore, when the loading table with the loaded materials is pushed into the welding box from the material inlet, the nitrogen in the welding box will not leak from the gaps of the material groove and the annular groove, and the stability of the nitrogen pressure in the welding box can be always maintained. (2) After the self-lubricating bushing and the welding ring of the present invention are loaded on the loading table, the driving module can drive the loading table to move towards the welding box. During the movement, the loading table first contacts the sealing plate. As the loading table continues to move, it can push the sealing plate into the welding box. The sealing plate can compress the elastic module and generate elastic force. When the loading table completely enters the welding box, the side wall of the loading table close to the workbench just fits into the material port, achieving the effect of closing the material port and avoiding nitrogen leakage. The present invention can drive the limiting column to descend to a preset height through the lifting module. When the limiting column descends, it can drive the welding ring to descend synchronously, so that the welding ring can descend to the welding position of the self-lubricating bushing. After the descent is completed, the welding ring and the self-lubricating bushing can be welded through the welding module. After the welding is completed, the driving module pushes the loading table out of the material port. During the pushing process, the elastic module drives the sealing plate to reset and fit into the material port through the elastic force, achieving the effect of re-sealing. During the entire loading and unloading process of the present invention, the nitrogen in the welding box is not directly connected to the outside through the material port, so as to avoid a large amount of nitrogen being discharged from the welding box, effectively saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 is a schematic structural diagram of an inner surface welding device for the production and processing of a self-lubricating bushing of the present invention Figure 1 ; Figure 2 is a schematic structural diagram of an inner surface welding device for the production and processing of a self-lubricating bushing of the present invention Figure 2 ; Figure 3 is a schematic internal structural diagram of an inner surface welding device for the production and processing of a self-lubricating bushing of the present invention; Figure 4 is a schematic vertical sectional structural diagram of an inner surface welding device for the production and processing of a self-lubricating bushing of the present invention; Figure 5 is a schematic horizontal sectional structural diagram of an inner surface welding device for the production and processing of a self-lubricating bushing of the present invention; Figure 6 is a schematic sectional structural diagram of the loading table in an inner surface welding device for the production and processing of a self-lubricating bushing of the present invention; Figure 7 is a schematic structural diagram of the movement process of the limiting column in an inner surface welding device for the production and processing of a self-lubricating bushing of the present invention; Figure 8 is a schematic structural diagram of the wedge-shaped seat in an inner surface welding device for the production and processing of a self-lubricating bushing of the present invention.

[0020] In the figure: 1, welding box; 2, workbench; 3, loading table; 4, driving mechanism; 5, sealing plate; 6, bearing seat; 7, self-lubricating bushing; 101, first air pump; 102, material opening; 103, limiting plate; 104, lifting mechanism; 105, rotating mechanism; 106, welding end; 107, baffle; 108, second partition; 109, first partition; 110, connecting frame; 111, horizontal mechanism; 112, second air pump; 301, material trough; 302, limiting column; 303, annular groove; 304, bearing ring; 305, positioning groove; 306, guide wheel; 307, wedge-shaped seat; 308, inclined guide surface; 309, first guide rod; 310, first spring; 501, sliding seat; 502, second guide rod; 503, second spring; 701, welding ring. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] Embodiment 1 Please refer to Figures 1 - 4 As shown in the figure, the present invention is an inner surface welding device for the production and processing of self-lubricating bushings, including a welding box 1, and a workbench 2 is fixedly arranged on one side of the welding box 1; specifically, the workbench 2 is fixed to the welding box 1 by bolts or welding.

[0023] A material opening 102 is opened on the box wall of the welding box 1 facing the workbench 2, a sealing plate 5 is slidably embedded in the material opening 102, and the sealing plate 5 is connected to an elastic module arranged in the welding box 1; a first air pump 101 for conveying nitrogen into the welding box 1 is also fixedly arranged outside the welding box 1; specifically, the other end of the first air pump 101 is connected to a nitrogen storage tank, and nitrogen can be conveyed into the welding box 1 through the first air pump 101; among them, when conveying nitrogen into the welding box 1, in order to prevent nitrogen from leaking from the material opening 102, in this embodiment, the material opening 102 can be sealed by the sealing plate 5, and when the sealing plate 5 is embedded in the material opening 102, it fits with the box wall at the material opening 102.

[0024] It should be noted that in this embodiment, other inert gases can also be used to replace nitrogen as long as the welding requirements are met.

[0025] A loading table 3 is slidably arranged on the workbench 2. The loading table 3 is connected to a driving module that drives it to move towards or away from the welding box 1. The projection size of the loading table 3 in the direction towards the welding box 1 is equal to the projection size of the sealing plate 5 in the direction towards the welding box 1. Specifically, when the driving module drives the loading table 3 to be inserted into the material inlet 102, the outer edge surface of the loading table 3 slides and fits with the box wall at the material inlet 102. Therefore, the nitrogen gas in the welding box 1 will not leak from the material inlet 102.

[0026] In addition, a pressure sensor is arranged in the welding box 1 to detect the nitrogen pressure in the welding box 1. The pressure sensor is electrically connected to the first air pump 101 through a controller. When the nitrogen pressure in the welding box 1 is less than the preset threshold, it can be replenished. Specifically, the pressure sensor can adopt a sensor of the STMicroelectronics LPS22HBTR model.

[0027] Please refer to Figures 6 - 7 , a material groove 301 is opened on the loading table 3. Specifically, the material groove 301 is of a cylindrical structure.

[0028] A limiting column 302 is coaxially arranged in the material groove 301. A bearing ring 304 is embedded between the limiting column 302 and the groove wall of the material groove 301. A positioning groove 305 for embedding the self-lubricating bushing 7 is formed by enclosing between the bearing ring 304, the limiting column 302 and the groove wall of the material groove 301. An annular groove 303 for embedding the welding ring 701 is opened at the top of the limiting column 302. The limiting column 302 is connected to a lifting module that drives it to lift and lower. Specifically, in the initial state, the top end of the limiting column 302 is flush with the top surface of the loading table 3. After the self-lubricating bushing 7 is embedded in the positioning groove 305 and the welding ring 701 is embedded in the annular groove 303, at this time, the top surfaces of both the self-lubricating bushing 7 and the welding ring 701 are flush with the loading table 3, and the self-lubricating bushing 7 is in close contact with the groove wall of the material groove 301 and the limiting column 302, and the welding ring 701 is in close contact with the groove wall of the annular groove 303 and the self-lubricating bushing 7. Therefore, when the loading table 3 with the loading completed is pushed from the material inlet 102 into the welding box 1, the nitrogen gas in the welding box 1 will not leak from the gaps of the material groove 301 and the annular groove 303, and the nitrogen gas pressure stability in the welding box 1 can be always maintained; In this embodiment, a welding module is further arranged in the welding box 1 to weld the welding ring 701 to the inner surface of the self-lubricating bushing 7; It should be noted that after the self-lubricating bushing 7 and the welding ring 701 are loaded on the loading table 3, in this embodiment, the driving module can be used to drive the loading table 3 to move towards the welding box 1. During the movement, the loading table 3 first contacts the sealing plate 5. As the loading table 3 continues to move, it can push the sealing plate 5 into the welding box 1. The sealing plate 5 can compress the elastic module and generate elastic force. When the loading table 3 completely enters the welding box 1, the side wall of the loading table 3 close to the workbench 2 just fits into the material inlet 102, achieving the effect of closing the material inlet 102 and preventing nitrogen leakage. In this embodiment, the lifting module can be used to drive the limiting column 302 to descend to a preset height. When the limiting column 302 descends, it can drive the welding ring 701 to descend synchronously. The descending height of the limiting column 302 in this embodiment is not limited, as long as the welding ring 701 can descend to the welding position of the self-lubricating bushing 7. After the descent is completed, the welding ring 701 and the self-lubricating bushing 7 can be welded by the welding module. After the welding is completed, the driving module pushes the loading table 3 out of the material inlet 102. During the pushing process, the elastic module drives the sealing plate 5 to reset and fit into the material inlet 102 through the elastic force, achieving the effect of re-sealing. In the entire loading and unloading process of this embodiment, the nitrogen in the welding box 1 is not directly connected to the outside through the material inlet 102, so as to avoid a large amount of nitrogen being discharged from the welding box 1, effectively saving costs.

[0029] Embodiment 2 On the basis of Embodiment 1, please refer to Figures 1 - 2 , during the welding process of the self-lubricating bushing 7 and the welding ring 701, since the lifting module drives the limiting column 302 and the welding ring 701 to descend a certain distance, the top surface of the limiting column 302 and the top surface of the loading table 3 are not flush. Then, during the process of the driving module pushing the loading table 3 out of the material inlet 102, the nitrogen in the welding box 1 will exchange with the outside through the space above the limiting column 302. To avoid a large amount of nitrogen leakage, in this embodiment, a baffle 107 is fixedly arranged on the box wall above the outside of the material inlet 102; specifically, after the welding is completed, during the process of the driving module pushing the loading table 3 out of the material inlet 102, the baffle 107 is in a sliding fit state with the top surface of the loading table 3, so as to cover the space above the limiting column 302, so that the welding box 1 does not directly exchange gas with the outside through the space above the limiting column 302. Even if there is some nitrogen remaining in the space above the limiting column 302, the amount of nitrogen is small and will not cause a large amount of nitrogen leakage in the welding box 1. In this embodiment, the nitrogen pressure in the welding box 1 can be monitored in real time by a pressure sensor, and then supplemented by the first air pump 101.

[0030] In this embodiment, please refer to Figures 1 - 2, the driving module includes a driving mechanism 4 fixed to one side of the workbench 2, and the driving end of the driving mechanism 4 is fixed to the loading table 3; it can be explained that in this embodiment, when driving the loading table 3 to move, it can be translated by the driving mechanism 4; the driving mechanism 4 in this embodiment can adopt a screw-nut transmission mechanism or a synchronous belt transmission mechanism, and this embodiment does not limit it, as long as it can meet the requirement of driving the loading table 3 to translate horizontally.

[0031] In this embodiment, reference can be made to Figure 6 and Figure 8 , the bearing ring 304 is slidably arranged in the material groove 301. Among them, several groups of bearing seats 6 for supporting the bearing ring 304 are fixedly arranged in a circumferential array on the groove wall of the material groove 301; specifically, in this embodiment, the bearing ring 304 is limited and supported by the bearing seats 6. When the self-lubricating bushing 7 is embedded in the material groove 301, the top surface of the self-lubricating bushing 7 is flush with the top surface of the loading table 3.

[0032] The air cylinder is referred to Figures 6 - 8 , the lifting module includes a guide wheel 306 rotatably arranged at the bottom of the limit post 302. Among them, a wedge-shaped seat 307 is slidably arranged in the material groove 301, and an inclined guide surface 308 for supporting the guide wheel 306 is opened on the wedge-shaped seat 307. The wedge-shaped seat 307 is connected to an adjusting mechanism for driving it to move in a direction close to or away from the axis; it can be explained that in the initial state, the guide wheel 306 abuts against the inclined guide surface 308 of the wedge-shaped seat 307. When the driving module drives the loading table 3 to move into the welding box 1, the adjusting mechanism drives the wedge-shaped seat 307 to move in a direction away from the axis end of the material groove 301, and the limit post 302 can fall a certain distance under the action of gravity, thereby synchronously driving the welding ring 701 to descend, so as to facilitate welding the welding ring 701 and the self-lubricating bushing 7.

[0033] As a further solution of this embodiment, please refer to Figure 1 and Figure 6The first guide rod 309 is fixed to the side of the wedge-shaped seat 307 away from the axial end of the material trough 301, and the first guide rod 309 extends to the outside of the material loading platform 3, and the end of the first guide rod 309 away from the wedge-shaped seat 307 is fixed to the limit plate 103, and a first spring 310 is provided on the first guide rod 309; wherein, a first partition plate 109 is fixedly arranged on one side of the material port 102; specifically, one end of the first spring 310 is fixed to the material loading platform 3, and the other end is fixed to the limit plate 103; it can be explained that in the initial state, based on the setting of the first spring 310, the guide wheel 306 is in contact with the inclined guide surface 308 of the wedge-shaped seat 307, and as the driving module drives the material loading platform 3 to move toward the welding box 1, when the material loading platform 3 When it is about to move to the welding position, the limit plate 103 contacts the first partition 109. Due to the limiting effect of the first partition 109, the limit plate 103 cannot continue to move, and then the wedge seat 307 can be driven to stop moving through the first guide rod 309. The first spring 310 contracts and generates elastic force. When the loading platform 3 continues to move for a distance, the guide wheel 306 and the wedge seat 307 are misaligned, so that the inclined guide surface 308 loses its supporting effect on the guide wheel 306, and the guide wheel 306 can automatically fall a certain distance. This embodiment does not need to use other servo drive equipment to adjust the descent of the limit column 302. The descent height of the limit column 302 can be automatically adjusted during the process of driving the loading platform 3 to move, which not only improves stability but also saves costs.

[0034] In addition, when the welding is completed and the loading platform 3 is pushed out, the guide wheel 306 contacts the inclined guide surface 308 again, but based on the setting of the baffle 107, the wedge seat 307 at this time still cannot be reset under the elastic force of the first spring 310, until the loading platform 3 moves to the point where the material trough 301 and the baffle 107 are misaligned, the first spring 310 can drive the wedge seat 307 to reset, and at the same time lift the limit column 302 and the welded self-lubricating sleeve 7 and welding ring 701 to a certain height.

[0035] Further, after welding is completed, please refer to Figures 6 - 7, in order to facilitate the manipulator to pick up and unload the self-lubricating bushing 7, a connecting frame 110 is fixedly arranged on the side of the first partition plate 109 away from the welding box 1, and a second partition plate 108 parallel to the first partition plate 109 is fixedly arranged at the end of the connecting frame 110; it can be explained that as the driving module drives the loading table 3 to continue moving away from the welding box 1 until the limiting plate 103 contacts the second partition plate 108. When the loading table 3 continues to move, since the wedge-shaped seat 307 cannot continue to move, the guide wheel 306 can move upward along the inclined guide surface 308, and the guide wheel 306 can then push the limiting column 302 and the welded self-lubricating bushing 7 upward until the upper surface of the bearing ring 304 is flush with the upper surface of the loading table 3, so as to facilitate the unloading gripper to grasp the self-lubricating bushing 7. Similarly, in this embodiment, there is no need to set other servo drive devices to drive the limiting column 302 to rise after welding. After welding in this embodiment, as the loading table 3 is pushed out, the limiting column 302 can be automatically pushed upward, with higher stability and cost savings.

[0036] In addition, please refer to Figures 3 - 5 , the elastic module includes two groups of second guide rods 502 fixed in the welding box 1. A sliding seat 501 fixed to the sealing plate 5 is slidably arranged on the second guide rods 502. A second spring 503 is arranged on the second guide rods 502. One end of the second spring 503 is fixed to the sliding seat 501, and the other end is fixed to the box wall; specifically, when the sealing plate 5 moves, it can drive the sliding seat 501 to slide on the second guide rods 502, thereby compressing the second spring 503 and generating elastic force to facilitate the subsequent reset of the sealing plate 5.

[0037] In this embodiment, the welding module includes a lifting mechanism 104 fixed in the welding box 1. The driving end of the lifting mechanism 104 is fixed to a horizontal mechanism 111. The driving end of the horizontal mechanism 111 is connected to a rotating mechanism 105. The driving end of the rotating mechanism 105 is fixed to a welding head 106; specifically, when the loading table 3 moves to the welding position in the welding box 1, the position of the welding head 106 can be adjusted through the lifting mechanism 104 and the horizontal mechanism 111 so that the driving welding head 106 moves to the welding point, and then the angle of the welding head 106 is adjusted in cooperation with the rotating mechanism 105 to perform circumferential welding on the weld of the self-lubricating bushing 7 and the welding ring 701; Specifically, the lifting mechanism 104 of this embodiment can adopt a screw-nut transmission mechanism or a synchronous belt transmission mechanism. The horizontal mechanism 111 can adopt an electric cylinder or a cylinder. The rotating mechanism 105 can adopt a servo motor. The lifting mechanism 104, the horizontal mechanism 111 and the rotating mechanism 105 of this embodiment all adopt servo drive devices of the prior art, and the specific models thereof are not limited in this embodiment.

[0038] It should also be noted that a second air pump 112 is fixedly arranged on the side wall of the welding box 1 for evacuating the welding box 1. After the welding box 1 is evacuated, nitrogen is input through the first air pump 101 to avoid the influence of other gases on the purity of nitrogen.

[0039] An inner surface welding process for the production and processing of a self-lubricating bushing includes the following steps: Please refer to Figures 1 - 4 , S1. The first air pump 101 conveys nitrogen into the welding box 1; S2. The self-lubricating bushing 7 is embedded in the positioning groove 305 and the welding ring 701 is embedded in the annular groove 303; S3. The driving module drives the feeding table 3 to move towards the welding box 1. During the movement, the feeding table 3 first contacts the sealing plate 5. As the feeding table 3 continues to move, it pushes the sealing plate 5 into the welding box 1, and the sealing plate 5 can compress the elastic module and generate elastic force; S4. After the feeding table 3 completely enters the welding box 1, the feeding table 3 abuts against one side wall of the workbench 2 and is embedded in the material inlet 102 to close the material inlet 102; S5. The lifting module drives the limiting column 302 to descend to a preset height. When the limiting column 302 descends, it can drive the welding ring 701 to descend synchronously, so that the welding ring 701 descends to the position to be welded of the self-lubricating bushing 7; S6. The welding module welds the welding ring 701 and the self-lubricating bushing 7; S7. After welding is completed, the driving module pushes the feeding table 3 out of the material inlet 102. During the pushing process, the elastic module drives the sealing plate 5 to reset and be embedded in the material inlet 102 through the elastic force to realize the re-sealing of the material inlet 102.

[0040] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it cannot be understood as a limitation of the present invention. In addition, "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0041] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] The above has described a specific embodiment of the present invention in detail, but the described content is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. An inner surface welding device for producing and processing a self-lubricating sleeve, comprising a welding box (1), a workbench (2) being fixedly arranged on one side of the welding box (1); It is characterized in that The welding box (1) is provided with a material opening (102) on a box wall close to the workbench (2), a sealing plate (5) is slidably embedded in the material opening (102), and the sealing plate (5) is connected to an elastic module arranged in the welding box (1); a first air pump (101) for conveying nitrogen into the welding box (1) is also fixedly arranged on the outer side of the welding box (1); A loading platform (3) is slidably arranged on the workbench (2), and the loading platform (3) is connected to a driving module that drives the loading platform (3) to move toward or away from the welding box (1); The loading platform (3) is provided with a material trough (301); a limiting column (302) is coaxially arranged in the material trough (301); a bearing ring (304) is embedded between the limiting column (302) and the groove wall of the material trough (301); the bearing ring (304), the limiting column (302) and the groove wall of the material trough (301) form a positioning groove (305) for embedding a self-lubricating sleeve (7); an annular groove (303) for embedding a welding ring (701) is provided on the top of the limiting column (302); the limiting column (302) is connected to a lifting module that drives the limiting column to rise and fall; The welding box (1) is also provided with a welding module for welding the welding ring (701) to the inner surface of the self-lubricating sleeve (7).

2. The inner surface welding device for producing and processing a self-lubricating sleeve according to claim 1 is characterized in that: A baffle (107) is fixedly arranged on the box wall above the outer side of the material opening (102).

3. The inner surface welding device for producing and processing a self-lubricating sleeve according to claim 1 is characterized in that: The driving module comprises a driving mechanism (4) fixed to one side of the workbench (2), and a driving end of the driving mechanism (4) is fixed to the loading platform (3).

4. The inner surface welding device for producing and processing a self-lubricating sleeve according to claim 1 is characterized in that: The carrying ring (304) is slidably arranged in the material trough (301); A plurality of groups of bearing seats (6) for supporting the bearing ring (304) are fixedly arranged in a circumferential array on the groove wall of the material groove (301).

5. The inner surface welding device for producing and processing a self-lubricating sleeve according to claim 1 is characterized in that: The lifting module comprises a guide wheel (306) rotatably arranged at the bottom of the limiting column (302); A wedge-shaped seat (307) is slidably arranged in the material trough (301), an inclined guide surface (308) for supporting the guide wheel (306) is provided on the wedge-shaped seat (307), and the wedge-shaped seat (307) is connected to an adjustment mechanism that drives it to move toward or away from the axis.

6. The inner surface welding device for producing and processing a self-lubricating sleeve according to claim 5, characterized in that: The side of the wedge-shaped seat (307) away from the axial end of the material trough (301) is fixed to a first guide rod (309) slidably plugged on the loading platform (3), the first guide rod (309) extends to the outside of the loading platform (3), the end of the first guide rod (309) away from the wedge-shaped seat (307) is fixed to the limit plate (103), and a first spring (310) is provided on the first guide rod (309); Wherein, a first partition plate (109) is fixedly arranged on one side of the material opening (102).

7. The inner surface welding device for producing and processing a self-lubricating sleeve according to claim 6 is characterized in that: A connecting frame (110) is fixedly arranged on a side of the first partition (109) away from the welding box (1), and a second partition (108) parallel to the first partition (109) is fixedly arranged at the end of the connecting frame (110).

8. The inner surface welding device for producing and processing a self-lubricating sleeve according to claim 1 is characterized in that: The elastic module comprises two groups of second guide rods (502) fixed in the welding box (1), a sliding seat (501) fixed to the sealing plate (5) is slidably arranged on the second guide rods (502), and a second spring (503) is arranged on the second guide rods (502).

9. The inner surface welding device for producing and processing a self-lubricating sleeve according to claim 1, characterized in that: The welding module comprises a lifting mechanism (104) fixed in the welding box (1), a driving end of the lifting mechanism (104) being fixed to a horizontal mechanism (111), a driving end of the horizontal mechanism (111) being connected to a rotating mechanism (105), and a driving end of the rotating mechanism (105) being fixed to a welding end (106).

10. An inner surface welding process for the production and processing of a self-lubricating sleeve, characterized in that: An inner surface welding device for producing and processing a self-lubricating sleeve as described in any one of claims 1 to 9 comprises the following steps: The first air pump (101) delivers nitrogen into the welding box (1); Inserting the self-lubricating sleeve (7) into the positioning groove (305) and inserting the welding ring (701) into the annular groove (303); The driving module drives the loading platform (3) to move toward the welding box (1). During the movement, the loading platform (3) first contacts the sealing plate (5). As the loading platform (3) continues to move, the sealing plate (5) is pushed toward the inside of the welding box (1). The sealing plate (5) can compress the elastic module and generate elastic force. After the loading platform (3) is completely inserted into the welding box (1), the loading platform (3) is embedded in the material opening (102) on the side wall facing the workbench (2) to close the material opening (102); The lifting module drives the limit column (302) to descend to a preset height. When the limit column (302) descends, it can drive the welding ring (701) to descend synchronously, so that the welding ring (701) descends to a position to be welded with the self-lubricating sleeve (7); The welding module welds the welding ring (701) and the self-lubricating sleeve (7); After welding is completed, the driving module pushes the loading platform (3) out of the material opening (102). During the pushing process, the elastic module drives the sealing plate (5) to reset and embed into the material opening (102) through elastic force, thereby achieving re-sealing of the material opening (102).

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