An inner surface welding device and process for producing and processing self-lubricating sleeves

Abstract

The present invention discloses an inner surface welding device and process for the production and processing of self-lubricating bushings, which relates to the technical field of self-lubricating bushings. The welding device includes a welding box, a workbench is fixedly arranged on one side of the welding box; a material port is provided on the box wall of the welding box close to the workbench, a sealing plate is slidably embedded in the material port, 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 on the outside of the welding box; a loading platform is slidably arranged on the workbench, and the loading platform is connected to a driving module that drives it to move toward or away from the welding box; a material trough is provided on the loading platform; a limiting column is coaxially arranged in the material trough, and a bearing ring is embedded between the limiting column and the trough wall of the material trough; when the present invention pushes the loading platform into the welding box from the material port, the nitrogen in the welding box will not leak from the gap between the material trough and the annular groove.

Description

Technical Field

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

[0002] Self-lubricating bushings, also known as self-lubricating sleeves or lubricant-free bearings, are a type of sliding bearing. They are typically made of plastic, carbon graphite, or metal composites and can operate without lubricating oil or grease. Self-lubrication is typically achieved by a solid lubricant embedded in the base, hence the name solid-lubricant bearing.

[0003] To improve the rigidity or sealing performance of self-lubricating bushings, reinforcement rings or sealing rings are often welded to their inner surfaces. During this welding process, the inner surface temperature of the bushing rises dramatically. If exposed to air, the metal surface reacts with oxygen to form oxides. For example, copper- or steel-based self-lubricating bushings react with oxygen in the air at high temperatures to produce oxides such as copper oxide and iron oxide. These oxides not only reduce the strength and tightness of the welded joint but can also cause defects such as cracks and pores in the weld, seriously affecting the bushing's performance and lifespan.

[0004] Nitrogen is an inert gas with stable chemical properties that is less likely to react with other substances during welding. Filling the welding area with nitrogen effectively isolates the air and reduces the oxygen content to extremely low levels, thus preventing oxidation of the metal surface at high temperatures, ensuring the purity of the metal in the weld area and improving weld quality.

[0005] In actual application, since self-lubricating bushings are processed in batches, frequent loading and unloading is required during the welding process. However, in order to avoid nitrogen leakage or nitrogen waste in the welding box during the loading and unloading process, an air pump is required to extract the nitrogen in the welding box during each loading and unloading process. Before the next set of welding, the welding box needs to be vacuumed and filled with nitrogen, which is a relatively cumbersome process. 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 sleeves to solve the following technical problems:

[0007] During the loading and unloading process of self-lubricating sleeves, the welding box needs to be evacuated with nitrogen, which is quite troublesome.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] An inner surface welding device for producing and processing a self-lubricating bushing comprises a welding box, with a workbench fixedly arranged on one side of the welding box;

[0010] The welding box has a material opening on the box wall facing the workbench, 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 supplying nitrogen into the welding box is also fixedly arranged on the outside of the welding box;

[0011] A loading platform is slidably arranged on the workbench, and the loading platform is connected to a driving module that drives it to move toward or away from the welding box;

[0012] A material trough is provided on the loading platform; a limiting column is coaxially arranged in the material trough, a load-bearing ring is embedded between the limiting column and the trough wall, and a positioning groove for embedding a self-lubricating sleeve is formed between the load-bearing ring, the limiting column and the trough wall. An annular groove for embedding a welding ring is provided on the top of the limiting column, and the limiting column is connected to a lifting module that drives it to rise and fall;

[0013] The welding box is also provided with a welding module for welding the welding ring to the inner surface of the self-lubricating sleeve.

[0014] Preferably, a baffle is fixedly arranged on the box wall above the outer side of the material opening.

[0015] Preferably, the driving module includes a driving mechanism fixed to one side of the workbench, and a driving end of the driving mechanism is fixed to the loading platform.

[0016] Preferably, the carrying ring is slidably arranged in the material trough;

[0017] Among them, a plurality of groups of bearing seats for supporting the bearing rings are fixedly arranged in a circumferential array on the trough wall of the material trough.

[0018] Preferably, the lifting module includes a guide wheel rotatably arranged at the bottom of the limiting column;

[0019] Among them, a wedge-shaped seat is slidably arranged in the material trough, and an inclined guide surface for supporting the guide wheel is provided on the wedge-shaped seat. The wedge-shaped seat is connected to an adjustment mechanism that drives it to move toward or away from the axis.

[0020] Preferably, the side of the wedge-shaped seat away from the axial end of the trough is fixed to a first guide rod slidably plugged into the loading platform, the first guide rod extends to the outside of the loading platform, the end of the first guide rod away from the wedge-shaped seat is fixed to the limit plate, and a first spring is provided on the first guide rod;

[0021] Wherein, a first partition is fixedly arranged on one side of the material inlet.

[0022] Preferably, a connecting frame is fixedly arranged on a side of the first partition away from the welding box, and a second partition parallel to the first partition is fixedly arranged at the end of the connecting frame.

[0023] 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 provided on the second guide rods, and a second spring is provided on the second guide rods.

[0024] Preferably, the welding module includes a lifting mechanism fixed in the welding box, a driving end of the lifting mechanism is fixed to the horizontal mechanism, a driving end of the horizontal mechanism is connected to the rotating mechanism, and a driving end of the rotating mechanism is fixed to the welding end.

[0025] A self-lubricating sleeve inner surface welding process for production and processing, applied to a self-lubricating sleeve inner surface welding device for production and processing as claimed in any one of claims 1 to 4, comprising the following steps:

[0026] The first air pump delivers nitrogen to the welding box;

[0027] Inserting the self-lubricating sleeve into the positioning groove and inserting the welding ring into the annular groove;

[0028] The driving module drives the loading platform to move toward the welding box. During the movement, the loading platform first contacts the sealing plate. As the loading platform continues to move, it pushes the sealing plate toward the welding box. The sealing plate can compress the elastic module and generate elastic force.

[0029] After the loading platform is completely inserted into the welding box, the loading platform leans against one side wall of the workbench and is embedded into the material opening to close the material opening;

[0030] The lifting module drives the limit column to descend to a preset height. When the limit column 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 sleeve;

[0031] The welding module welds the welding ring to the self-lubricating sleeve;

[0032] After welding is completed, the driving module pushes the loading platform out of the material port. During the pushing process, the elastic module drives the sealing plate to reset and embed into the material port through elastic force, thereby achieving re-sealing of the material port.

[0033] Beneficial effects of the present invention:

[0034] (1) In the initial state of the present invention, the top of the limiting column is flush with the top surface of the loading platform. After the self-lubricating sleeve is inserted into the positioning groove and the welding ring is inserted into the annular groove, the top surfaces of the self-lubricating sleeve and the welding ring are flush with the loading platform, and the self-lubricating sleeve fits tightly with the groove wall of the material groove and the limiting column, and the welding ring fits tightly with the groove wall of the annular groove and the self-lubricating sleeve. Therefore, when the loading platform with completed loading is pushed from the material port into the welding box, the nitrogen in the welding box will not leak from the gap between the material groove and the annular groove, and the stability of the nitrogen pressure in the welding box can be maintained at all times;

[0035] (2) After the self-lubricating sleeve and welding ring of the present invention are loaded on the loading platform, the loading platform can be driven by the driving module to move toward the welding box. During the movement, the loading platform first contacts the sealing plate. As the loading platform continues to move, the sealing plate can be pushed toward the welding box. The sealing plate can compress the elastic module and generate elastic force. When the loading platform completely enters the welding box, the loading platform is close to the side wall of the workbench and is just embedded in the material port, achieving the effect of sealing the material port and avoiding nitrogen leakage. The present invention can drive the limit 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 to meet the requirement that the welding ring descends to the position to be welded of the self-lubricating sleeve. After the descent is completed, the welding ring and the self-lubricating sleeve can be welded through the welding module. After the welding is completed, the driving module pushes the loading platform out of the material port. During the pushing process, the elastic module drives the sealing plate to reset and embed into the material port through the elastic force to achieve the effect of re-sealing. During the entire loading and unloading process of the present invention, the nitrogen in the welding box will not be directly connected to the outside world through the material port to avoid a large amount of nitrogen being discharged from the welding box, thereby effectively saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below with reference to the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of the structure of an inner surface welding device for producing and processing a self-lubricating sleeve according to the present invention. Figure 1 ;

[0038] Figure 2 This is a schematic diagram of the structure of an inner surface welding device for producing and processing a self-lubricating sleeve according to the present invention. Figure 2 ;

[0039] Figure 3 This is a schematic diagram of the internal structure of an inner surface welding device for producing and processing a self-lubricating sleeve according to the present invention;

[0040] Figure 4 It is a vertical cross-sectional structural diagram of an inner surface welding device for producing and processing a self-lubricating sleeve according to the present invention;

[0041] Figure 5 This is a horizontal cross-sectional structural diagram of an inner surface welding device for producing and processing a self-lubricating sleeve according to the present invention;

[0042] Figure 6 This is a schematic cross-sectional view of the structure of a loading platform in an inner surface welding device for producing and processing a self-lubricating bushing according to the present invention;

[0043] Figure 7 This is a structural schematic diagram of the movement process of a limit column in an inner surface welding device for producing and processing a self-lubricating sleeve according to the present invention;

[0044] Figure 8 The present invention is a schematic structural diagram of a wedge-shaped seat in an inner surface welding device for producing and processing a self-lubricating sleeve.

[0045] In the figure: 1. welding box; 2. workbench; 3. loading platform; 4. driving mechanism; 5. sealing plate; 6. bearing seat; 7. self-lubricating sleeve; 101. first air pump; 102. material port; 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 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 DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] Example 1

[0048] See also Figure 1-Figure 4 As shown, the present invention is an inner surface welding device for producing and processing self-lubricating sleeves, 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.

[0049] A material port 102 is provided on the box wall of the welding box 1 close to the workbench 2, and a sealing plate 5 is slidably embedded in the material port 102, and the sealing plate 5 is connected to the 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 outside of the welding box 1; specifically, the other end of the first air pump 101 is connected to the nitrogen storage tank, and nitrogen can be conveyed into the welding box 1 through the first air pump 101; wherein, when conveying nitrogen into the welding box 1, in order to prevent nitrogen from leaking from the material port 102, the material port 102 can be sealed by the sealing plate 5 in this embodiment, and when the sealing plate 5 is embedded in the material port 102, it fits with the box wall at the material port 102.

[0050] 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.

[0051] A loading platform 3 is slidingly arranged on the workbench 2, and the loading platform 3 is connected to a driving module that drives it to move toward or away from the welding box 1. The projection size of the loading platform 3 toward the welding box 1 is equal to the projection size of the sealing plate 5 toward the welding box 1; specifically, when the driving module drives the loading platform 3 to embed into the material port 102, the outer edge surface of the loading platform 3 slides and fits with the box wall at the material port 102, so the nitrogen in the welding box 1 will not leak at the material port 102.

[0052] In addition, a pressure sensor is provided 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 the controller. When the nitrogen pressure in the welding box 1 is lower than a preset threshold, it is replenished. Specifically, the pressure sensor can be an STMicroelectronics LPS22HBTR model sensor.

[0053] See also Figure 6-Figure 7 A material trough 301 is provided on the loading platform 3; specifically, the material trough 301 is a cylindrical structure.

[0054] A limiting post 302 is coaxially arranged in the material trough 301, and a carrying ring 304 is embedded between the limiting post 302 and the trough wall of the material trough 301. The carrying ring 304, the limiting post 302 and the trough wall of the material trough 301 form a positioning groove 305 for embedding the self-lubricating sleeve 7. An annular groove 303 for embedding the welding ring 701 is opened on the top of the limiting post 302. The limiting post 302 is connected to a lifting module that drives it to rise and fall; specifically, in the initial state, the top of the limiting post 302 is flush with the top surface of the loading platform 3, and the self-lubricating sleeve 7 is embedded in the positioning groove 30 5 and after the welding ring 701 is inserted into the annular groove 303, the top surfaces of the self-lubricating sleeve 7 and the welding ring 701 are flush with the loading platform 3, and the self-lubricating sleeve 7 is tightly fitted with the groove wall of the material groove 301 and the limiting column 302, and the welding ring 701 is tightly fitted with the groove wall of the annular groove 303 and the self-lubricating sleeve 7. Therefore, when the loading platform 3 is pushed into the welding box 1 through the material port 102, the nitrogen in the welding box 1 will not leak from the gap between the material groove 301 and the annular groove 303, and the nitrogen pressure in the welding box 1 can always be kept stable.

[0055] In this embodiment, a welding module is further provided in the welding box 1 for welding the welding ring 701 to the inner surface of the self-lubricating sleeve 7;

[0056] It should be noted that after the self-lubricating sleeve 7 and the welding ring 701 are loaded on the loading platform 3, the present embodiment can drive the loading platform 3 to move toward the welding box 1 through the driving module. 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 can be pushed to move toward the welding box 1. The sealing plate 5 can compress the elastic module and generate elastic force. When the loading platform 3 completely enters the welding box 1, the loading platform 3 is close to the side wall of the workbench 2 and is just embedded in the material port 102, achieving the effect of sealing the material port 102 to avoid nitrogen leakage. The present embodiment can drive the limit column 302 to descend to a preset height through the lifting module, and the limit column 302 is lowered When it descends, the welding ring 701 can be driven to descend synchronously. The present embodiment does not limit the descending height, so that the welding ring 701 can be lowered to the welding position of the self-lubricating sleeve 7. After the descent is completed, the welding ring 701 can be welded to the self-lubricating sleeve 7 through the welding module. After the welding is completed, the driving module pushes the loading platform 3 out of the material port 102. During the pushing process, the elastic module drives the sealing plate 5 to reset and embed it into the material port 102 through the elastic force to achieve the effect of re-sealing. In the present embodiment, during the entire loading and unloading process, the nitrogen in the welding box 1 will not be directly connected to the outside world through the material port 102 to avoid a large amount of nitrogen being discharged from the welding box 1, thereby effectively saving costs.

[0057] Example 2

[0058] Based on Example 1, please refer to Figure 1-Figure 2 , in the process of welding the self-lubricating sleeve 7 and the welding ring 701, since the lifting module drives the limiting column 302 and the welding ring 701 to drop a certain distance, the top surface of the limiting column 302 is not flush with the top surface of the loading platform 3. In the process of the driving module pushing the loading platform 3 out of the material port 102, the nitrogen in the welding box 1 will be exchanged with the outside world from above the limiting column 302. In order to avoid a large amount of nitrogen leakage, in this embodiment, a baffle 107 is fixed on the box wall above the outer side of the material port 102; specifically, after the welding is completed, the driving module During the process of pushing the loading platform 3 out of the material port 102, the baffle 107 and the top surface of the loading platform 3 are in a sliding fit state, and then the space above the limiting column 302 can be covered, so that the welding box 1 will not directly exchange gas with the outside world 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 through the pressure sensor, and then replenished through the first air pump 101.

[0059] In this embodiment, please refer to Figure 1-Figure 2The 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 platform 3; it can be explained that in this embodiment, when driving the loading platform 3 to move, it can be driven to move horizontally by the driving mechanism 4; the driving mechanism 4 in this embodiment can adopt a screw and nut transmission mechanism or a synchronous belt transmission mechanism, which is not limited in this embodiment, so as to drive the loading platform 3 to move horizontally.

[0060] In this embodiment, please refer to Figure 6 and Figure 8 The carrying ring 304 is slidably arranged in the material trough 301, wherein a plurality of groups of supporting seats 6 for supporting the carrying ring 304 are fixedly arranged in a circumferential array on the trough wall of the material trough 301; specifically, in this embodiment, the carrying ring 304 is limitedly supported by the supporting seat 6, and when the self-lubricating sleeve 7 is embedded in the material trough 301, the top surface of the self-lubricating sleeve 7 is flush with the top surface of the loading platform 3.

[0061] Cylinder Reference Figure 6-Figure 8 The lifting module includes a guide wheel 306 rotatably arranged at the bottom of the limiting column 302, wherein a wedge-shaped seat 307 is slidably arranged in the material trough 301, and an inclined guide surface 308 for supporting the guide wheel 306 is provided on the wedge seat 307, and the wedge seat 307 is connected to an adjustment mechanism that drives it to move toward or away from the axis. It can be explained that in the initial state, the guide wheel 306 is in contact with the inclined guide surface 308 of the wedge seat 307. When the driving module drives the loading platform 3 to move into the welding box 1, the adjustment mechanism drives the wedge seat 307 to move in the direction away from the axis end of the material trough 301, and the limiting column 302 can fall a certain distance under the action of gravity, thereby synchronously driving the welding ring 701 to descend, so as to facilitate the welding of the welding ring 701 and the self-lubricating sleeve 7.

[0062] 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 is slidably inserted into the loading platform 3. The first guide rod 309 extends to the outside of the 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. 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 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. As the driving module drives the loading platform 3 to move toward the welding box 1, when the loading platform 3 When it is about to move to the welding position, the limit plate 103 contacts the first partition 109. Under 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 require the use of 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.

[0063] 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.

[0064] Further, after welding is completed, please refer to Figure 6-Figure 7In order to facilitate the manipulator to grab and unload the self-lubricating sleeve 7, a connecting frame 110 is fixedly arranged on the 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; it can be explained that as the driving module drives the loading platform 3 to continue to move in the direction away from the welding box 1 until the limit plate 103 contacts the second partition 108, when the loading platform 3 continues to move, the wedge-shaped seat 307 cannot continue to move, so that the guide wheel 306 can move along As the inclined guide surface 308 moves upward, the guide wheel 306 can push the limit column 302 and the welded self-lubricating sleeve 7 to rise until the upper surface of the supporting ring 304 is flush with the upper surface of the loading platform 3, so that the unloading clamp can grab the self-lubricating sleeve 7. Similarly, this embodiment does not need to set up other servo drive equipment to drive the limit column 302 to rise after welding is completed. After welding, this embodiment can automatically push the limit column 302 to rise as the loading platform 3 is pushed out, which has higher stability and saves costs.

[0065] Also, see Figure 3-Figure 5 The elastic module includes two groups of second guide rods 502 fixed in the welding box 1. The second guide rods 502 are slidably provided with a slide 501 fixed to the sealing plate 5. The second guide rods 502 are provided with a second spring 503. One end of the second spring 503 is fixed to the slide 501, and the other end is fixed to the box wall. Specifically, when the sealing plate 5 moves, it can drive the slide 501 to slide on the second guide rod 502, thereby compressing the second spring 503 and generating elastic force, so as to facilitate the subsequent pushing of the sealing plate 5 to reset.

[0066] 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 the horizontal mechanism 111, the driving end of the horizontal mechanism 111 is connected to the rotating mechanism 105, and the driving end of the rotating mechanism 105 is fixed to the welding end head 106; specifically, when the loading table 3 moves to the welding position in the welding box 1, the position of the welding end head 106 can be adjusted by the lifting mechanism 104 and the horizontal mechanism 111, so that the welding end head 106 is driven to move to the welding point, and then the angle of the welding end head 106 is adjusted in cooperation with the rotating mechanism 105, so that the weld between the self-lubricating sleeve 7 and the welding ring 701 is circumferentially welded;

[0067] Specifically, the lifting mechanism 104 of this embodiment can adopt a screw and nut transmission mechanism or a synchronous belt transmission mechanism, the horizontal mechanism 111 can adopt an electric cylinder or a pneumatic cylinder, and 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 the servo drive equipment of the existing technology, and this embodiment does not limit its specific model.

[0068] It should also be noted that a second air pump 112 is fixedly arranged on the side wall of the welding box 1 for vacuuming the welding box 1. After the welding box 1 is vacuumed, nitrogen is input through the first air pump 101 to avoid the influence of other gases on the purity of the nitrogen.

[0069] An inner surface welding process for producing and processing a self-lubricating sleeve comprises the following steps:

[0070] See also Figure 1-Figure 4 , S1, the first air pump 101 delivers nitrogen to the welding box 1;

[0071] S2, inserting the self-lubricating sleeve 7 into the positioning groove 305 and inserting the welding ring 701 into the annular groove 303;

[0072] S3, 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, it pushes the sealing plate 5 toward the inside of the welding box 1. The sealing plate 5 can compress the elastic module and generate elastic force;

[0073] S4, after the loading platform 3 is completely inserted into the welding box 1, the loading platform 3 leans against the side wall of the workbench 2 and is embedded in the material opening 102 to close the material opening 102;

[0074] 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 with the self-lubricating sleeve 7;

[0075] S6, the welding module welds the welding ring 701 to the self-lubricating sleeve 7;

[0076] S7. After welding is completed, the driving module pushes the loading platform 3 out of the material port 102. During the pushing process, the elastic module drives the sealing plate 5 to reset and embed into the material port 102 through elastic force, thereby resealing the material port 102.

[0077] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying 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 direction, and a specific direction structure and operation, and therefore, cannot be understood as limiting the present invention. In addition, "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0078] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0079] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An inner surface welding device for producing and processing a self-lubricating bushing, comprising a welding box (1), a workbench (2) being fixedly arranged on one side of the welding box (1); It is characterized by: The welding box (1) is provided with a material opening (102) on a box wall 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 on the outside 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); A material trough (301) is provided on the loading platform (3); 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 trough wall of the material trough (301); the bearing ring (304), the limiting column (302) and the trough wall of the material trough (301) are enclosed to 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 it to rise and fall; The welding box (1) is further provided with a welding module for welding the welding ring (701) to the inner surface of the self-lubricating sleeve (7); The lifting module includes 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), and an inclined guide surface (308) for supporting the guide wheel (306) is provided on the wedge-shaped seat (307). The wedge-shaped seat (307) is connected to an adjustment mechanism that drives it to move toward or away from the axis.

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, 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 trough wall of the material trough (301).

5. The inner surface welding device for producing and processing a self-lubricating sleeve according to claim 1, 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 (109) is fixedly arranged on one side of the material opening (102).

6. The inner surface welding device for producing and processing a self-lubricating sleeve according to claim 5, 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).

7. The inner surface welding device for producing and processing a self-lubricating sleeve according to claim 1, characterized in that: The elastic module comprises two sets 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 provided on the second guide rods (502).

8. 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) is fixed to a horizontal mechanism (111), a driving end of the horizontal mechanism (111) is connected to a rotating mechanism (105), and a driving end of the rotating mechanism (105) is fixed to a welding end (106).

9. A self-lubricating sleeve inner surface welding process for production and processing, 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 8 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 one side wall of the workbench (2) to close the material opening (102); 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 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 port (102). During the pushing process, the elastic module drives the sealing plate (5) to reset and embed into the material port (102) through elastic force, thereby achieving re-sealing of the material port (102).

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