Anti-cracking welding device for sintered plate
The sintered plate anti-crack welding device with four-point fixing and support structure solves the problem of weld cracks caused by uneven welding stress, and improves the stability and sealing of the welding process.
Patent Information
- Application Number
- CN202423324181.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Uneven welding stress during the welding of heat exchange tubes and sintered plates can easily cause cracks in the weld, affecting sealing and the reaction process.
A sintered plate anti-crack welding device is adopted, which disperses welding stress through a four-point fixing and support structure, combined with a preheating and cleaning mechanism to ensure uniform heat distribution and reduce the generation of welding cracks.
It effectively reduces the generation of welding cracks, improves the sealing and strength of welds, and ensures the stability and safety of the welding process.
Smart Images
Figure CN223718613U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to sintered plate welding technical field, specifically is a kind of sintered plate anti-cracking welding device. BACKGROUND
[0002] In the process of reaction hydrogen production, exothermic reaction refers to the process of releasing heat in chemical reaction. This reaction is usually due to the energy change caused by the formation and rupture of chemical bonds. In the process of hydrogen production, exothermic reaction can provide the necessary energy to drive the reaction to proceed, thereby producing hydrogen.
[0003] In the process of hydrogen production by reaction, the reactants are usually placed in the exothermic tube of the exothermic reactor, and the sintered plate is welded on the end of the exothermic tube to block the reactants inside the exothermic tube. Since the sintered plate is made by stacking stainless steel powder and then pressing it once under high pressure, it has a filter element with small pores that are not easily visible to the naked eye. Therefore, the hydrogen produced by the reaction will be released, and the reactants will be blocked. Then the exothermic tube is welded into the insertion hole of the heat exchanger, and water is injected into the interior of the heat exchanger to absorb the heat generated during the reaction process, to prevent excessive heat release during the reaction, which may cause damage to the heat exchanger.
[0004] During the welding process of the heat exchange tube and the sintered plate, the change of welding speed will cause uneven temperature of the bottom weld, and welding stress will be generated. This welding stress accumulates in the weld and easily causes cracks, which leads to poor sealing of the heat exchange tube and easily affects the reaction.
[0005] Therefore, the utility model provides a sintered plate anti-cracking welding device. UTILITY MODEL CONTENT
[0006] In order to make up for the shortcomings of the prior art and solve at least one technical problem raised in the background art.
[0007] The utility model discloses a sintering plate anti -crack welding device, including the welding platform, the welding platform middle part is equipped with the placing groove, the placing groove middle part is equipped with the fixed component, the welding platform top installs the linear motor, the linear motor middle part installs the adjusting frame, the adjusting frame middle part slidingly connected has the fixed frame, the fixed frame end is round and is provided with, the fixed frame middle part rotatably connected has the rotating disc, the rotating disc outside wall is fixedly connected with the big gear, the fixed frame middle part installs the first driver, the first driver output is fixedly connected with the pinion, the pinion and the big gear are meshed and are provided, the rotating disc middle part is equipped with the welding head, the welding head penetrates the rotating disc middle part, the placing groove middle part is equipped with the ejection assembly, the welding platform top rotatably connected has the support rod, the support rod middle part slidingly connected has the sliding rod, the sliding rod end is fixedly connected with the sucking disc, through above -mentioned structure first four points fixed to heat exchange pipe and sintering plate can carry out preliminary fixed and support, make the connection between heat exchange pipe and sintering plate more firm and comprehensive, in the welding process, first can scatter and reduce welding stress to a certain extent, reduce the generation of welding crack, through welding four key points, can make the subsequent welding process heat distribution even, reduce the crack caused by heat concentration.
[0008] Preferably, the fixed component includes two sets of fixed plates; the fixed plates are elastically arranged; the two fixed plates are a set; the two fixed plates are oppositely arranged; the fixed plates are fixedly connected with ejector rods at the middle portions; the welding platform is provided with a plurality of telescopic grooves at the middle portions; the ejector rods are slidingly connected in the middle portions of the telescopic grooves; the ejector rods are fixedly connected with first springs at the ends; the first springs are fixedly connected at one end of the telescopic grooves; the above structure can effectively fix heat exchange pipes of different sizes, reduce shaking of the heat exchange pipes during welding, and reduce welding defects caused by shaking or misplacement of the heat exchange pipes during welding. The fixed plates can disperse stress generated during welding, reduce cracks and fractures caused by stress concentration.
[0009] Preferably, the welding platform is fixedly connected with a fixed rod at the top; the fixed rod is fixedly connected with a second driver at the end; the second driver is fixedly connected with a rotating rod at the output end; the welding platform is fixedly connected with a fixed block at the top; the rotating rod is rotatably connected at the top of the fixed block; the rotating rod is fixedly connected with a connecting pipe at the middle portion; the connecting pipe is fixedly connected with a brush plate at the bottom; the connecting pipe is provided with a smoke suction assembly at the middle portion; the above structure can clean the surface of the heat exchange pipe before welding, effectively remove dust and impurities attached to the surface of the heat exchange pipe, reduce the strength and sealing degree of the weld caused by impurities remaining on the welding position, and effectively improve the sealing performance of the weld.
[0010] Preferably, the welding table top is provided with a preheating cavity; the preheating cavity is arranged at the top of the placing groove; the inner side wall of the preheating cavity is fixedly connected with a heat conduction plate; and the middle part of the preheating cavity is provided with a heating wire; through the above structure, the welding position can be effectively preheated, the thermal stress generated due to heat concentration in the welding process can be reduced, the welding deformation problem can be reduced, and the cooling speed of the weld can be reduced, the generation of welding cracks can be reduced, and the strength and toughness of the weld can be effectively improved.
[0011] Preferably, the ejection assembly comprises a plurality of second springs; the plurality of second springs are fixedly connected at the bottom of the placing groove; the end of the plurality of second springs is fixedly connected with a top plate; the middle part of the top plate is slidably connected in the middle part of the placing groove; the middle part of the welding table is slidably connected with a positioning rod; the end of the positioning rod is fixedly connected with a third spring on the side wall of the welding table; through the above structure, the heat exchange pipe can be easily taken out from the inside of the placing groove after being welded with the sintering plate, the operator can more quickly and accurately complete the welding work, the operation is simple and fast, and the operation time required for taking out the heat exchanger after being fixedly installed can be reduced.
[0012] Preferably, the smoking assembly comprises a smoking device; the smoking device is installed on the side wall of the welding table; the middle part of the smoking device is fixedly connected with a smoking pipe; the end of the smoking pipe is fixedly connected in the middle part of a fixed block; the fixed block is provided in a hollow manner with a rotating rod; a plurality of smoking holes are formed in the middle part of the connecting pipe; through the above structure, the smoke and particulate matters in the welding process can be effectively collected, the pollution of the working environment caused by direct emission of welding smoke can be reduced, and the harm of smoke to personnel in the working area can be reduced.
[0013] The beneficial effects of the utility model are as follows:
[0014] 1. The sintering plate anti-cracking welding device, through the above structure, the heat exchange pipe and the sintering plate can be preliminarily fixed and supported through four-point fixing, the connection between the heat exchange pipe and the sintering plate is more firm and comprehensive, in the welding process, welding stress can be dispersed and reduced to a certain extent, the generation of welding cracks can be reduced, through welding of four key points, heat can be uniformly distributed in the subsequent welding process, and cracks caused by heat concentration can be reduced.
[0015] 2. The sintering plate anti-cracking welding device, through the above structure, different sizes of heat exchange pipes can be effectively fixed, heat exchange pipes can be prevented from shaking in the welding process, and the problem that welding defects are caused by shaking or misplacement of heat exchange pipes in the welding process can be reduced; stress generated in the welding process can be dispersed through the fixing plate, and cracks and fractures caused by stress concentration can be reduced. BRIEF DESCRIPTION OF DRAWINGS
[0016] The utility model will be further described in connection with the drawings.
[0017] Figure 1 is a perspective view of the utility model;
[0018] Figure 2 is a structure schematic view of the welding head in the utility model;
[0019] Figure 3 is a structure schematic view of the brush plate in the utility model;
[0020] Figure 4 is a structure schematic view of the fixed assembly in the utility model;
[0021] Figure 5 is a structure schematic view of the ejection assembly in the utility model.
[0022] In the drawing: 1, welding table; 10, linear motor; 11, adjusting frame; 12, fixed frame; 13, rotating disc; 14, large gear; 15, welding head; 16, first driver; 17, small gear; 18, placing groove; 19, support rod; 111, sliding rod; 112, suction cup; 2, fixed assembly; 21, ejector rod; 22, telescopic groove; 23, first spring; 24, fixed plate; 3, fixed rod; 31, second driver; 32, fixed block; 33, rotating rod; 34, connecting pipe; 35, brush plate; 4, preheating cavity; 41, heat conduction plate; 42, heating wire; 5, ejection assembly; 51, second spring; 52, top plate; 53, positioning rod; 54, third spring; 6, smoke suction assembly; 61, smoke extractor; 62, smoke suction pipe; 63, smoke suction hole; 7, rubber pad. DETAILED DESCRIPTION
[0023] In order to make the technical means, creation features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.
[0024] For example, Figures 1 to 5The utility model discloses a sintering plate anti -crack welding device, including welding platform 1, the welding platform 1 middle part is equipped with the fixed assembly 2 that places the groove 18, welding platform 1 top is equipped with the linear motor 10, the linear motor 10 middle part is equipped with the adjusting frame 11, the adjusting frame 11 middle part is equipped with the fixed frame 12 of sliding connection, the fixed frame 12 end is round and is provided, the fixed frame 12 middle part is rotatably connected with the rotary disc 13, the rotary disc 13 outer wall is fixedly connected with the large gear 14, the fixed frame 12 middle part is equipped with the first driver 16, the first driver 16 output is fixedly connected with the pinion 17, the pinion 17 with the large gear 14 is meshed and is provided, the rotary disc 13 middle part is equipped with the welding head 15, the welding head 15 is through rotary disc 13 middle part, the placing groove 18 middle part is equipped with the ejection assembly 5, the welding platform 1 top rotatable connection has the support rod 19, the support rod 19 middle part is equipped with the sliding rod 111 of sliding connection, the sliding rod 111 end is fixedly connected with the sucking disc 112, when working, the heat exchange pipe is placed in the placing groove 18 inside, is fixed with it through the fixed assembly 2, places the sintering plate in the heat exchange pipe welding position, rotates the support rod 19, and the sliding rod 111 slides down, and the sucking disc 112 absorbs the sintering plate and fixes in the specified position, and the linear motor 10 is opened, and the adjusting frame 11 moves to the middle part, at this moment, the adjusting frame 11 will rotary disc 13 move down, and the first driver 16 is opened simultaneously, and the pinion 17 drives the large gear 14 to rotate, and the rotary disc 13 rotates in the middle part of fixed frame 12, through control system first welding head 15 is rotated to one point between the heat exchange pipe and the sintering plate, first welds a point, and then controls rotary disc 13 to move up, and the first driver 16 drives the pinion 17 again to make the large gear 14 rotate, and the heat exchange pipe and the sintering plate between four points are fixed repeatedly, and then the sliding rod 111 moves up, and the support rod 19 rotates and resets, and the welding head 15 is controlled around the sintering plate and the heat exchange pipe and is welded in a circle, after welding is completed, the heat exchange pipe is lifted and taken out through the ejection assembly 5, through the above structure, four points of the heat exchange pipe and the sintering plate can be preliminary fixed and supported, make the connection between the heat exchange pipe and the sintering plate more firm and comprehensive, in the welding process, first can disperse and reduce welding stress to some extent, reduce the generation of welding crack, through welding four key points, can make the subsequent welding process heat distribution uniform, reduce the crack caused by heat concentration.
[0025] As Figure 3As shown, the fixed assembly 2 comprises two sets of fixed plates 24; the fixed plates 24 are elastically arranged; two fixed plates 24 are a set; two fixed plates 24 are oppositely arranged; the middle of the fixed plate 24 is fixedly connected with the top rod 21; the middle of the welding table 1 is provided with a plurality of telescopic grooves 22; the top rod 21 is slidably connected in the middle of the telescopic groove 22; the end of the top rod 21 is fixedly connected with the first spring 23; the end of the first spring 23 is fixedly connected at one end of the telescopic groove 22; when the heat exchange pipe is placed in the middle of the placing groove 18, the heat exchange pipe first contacts the surface of the top rod 21, when the plurality of top rods 21 are pressed, the top rod 21 moves to the inside of the telescopic groove 22, and at the same time the first spring 23 elastically contracts, the heat exchange pipe is fixed by being extruded by the fixed plate 24, heat exchange pipes of different sizes are fixed, the above structure can effectively fix heat exchange pipes of different sizes, reduce the shaking of the heat exchange pipe during welding, and reduce the problem of welding defects caused by the shaking or misplacement of the heat exchange pipe during welding. The fixed plate 24 can disperse the stress generated during welding, reduce the cracks and fractures caused by stress concentration.
[0026] As shown in Figure 1 and Figure 3 As shown, the top of the welding table 1 is fixedly connected with a fixed rod 3; the end of the fixed rod 3 is fixedly connected with a second driver 31; the output end of the second driver 31 is fixedly connected with a rotating rod 33; the top of the welding table 1 is fixedly connected with a fixed block 32; the rotating rod 33 is rotatably connected at the top of the fixed block 32; the middle of the rotating rod 33 is fixedly connected with a connecting pipe 34; the bottom of the connecting pipe 34 is fixedly connected with a brush plate 35; the middle of the connecting pipe 34 is provided with a smoke suction assembly 6; after the heat exchange pipe is placed in the placing groove 18 and fixed, the second driver 31 is controlled to rotate at the output end, the output end of the second driver 31 drives the rotating rod 33 to rotate in the middle of the fixed block 32, at this time the connecting pipe 34 rotates with the rotating rod 33, the brush plate 35 passes through the end of the heat exchange pipe to clean the welding position, the connecting pipe 34 rotates to one side and then rotates to reset, so as to perform welding work, the above structure can clean the surface of the heat exchange pipe before welding, can effectively remove dust and impurities attached to the surface of the heat exchange pipe, can reduce the residue of impurities on the welding position to reduce the strength and sealing degree of the weld, and can effectively improve the sealing performance of the weld.
[0027] As shown in Figure 3As shown in the figure, the welding table 1 top is provided with a preheating cavity 4; the preheating cavity 4 is arranged at the top of the placing groove 18; the inner wall of the preheating cavity 4 is fixedly connected with a heat conduction plate 41; the middle part of the preheating cavity 4 is provided with a heating wire 42; during operation, the heating wire 42 is controlled to be turned on, so that heat is generated on the surface of the heating wire 42, and the heat is transmitted to the heat conduction plate 41, and is quickly transmitted to the inner wall of the placing groove 18 through the heat conduction plate 41; when the heat exchange tube is placed in the placing groove 18, the heat exchange tube welding position is preheated by heat, the above structure can effectively preheat the welding position, can reduce the thermal stress generated by heat concentration in the welding process, reduce the welding deformation problem, and can reduce the cooling speed of the weld, reduce the generation of welding cracks, effectively improve the strength and toughness of the weld.
[0028] As shown in Figure 4 and Figure 5 , the ejection assembly 5 includes a plurality of second springs 51; a plurality of second springs 51 are fixedly connected at the bottom of the placing groove 18; a plurality of second springs 51 are fixedly connected with a top plate 52 at the end; the middle part of the top plate 52 is slidingly connected in the middle part of the placing groove 18; the middle part of the welding table 1 is slidingly connected with a positioning rod 53; the end of the positioning rod 53 is fixedly connected with a third spring 54 on the side wall of the welding table 1; during operation, when the heat exchange tube is placed in the placing groove 18, the lower end of the heat exchange tube is in contact with the top plate 52 and exerts pressure thereon, and the plurality of second springs 51 are elastically contracted, at this time the positioning rod 53 is pulled outward, the third spring 54 is elastically stretched, the positioning rod 53 is loosened and moves towards the inside of the placing groove 18, the top plate 52 is blocked by the end of the positioning rod 53, and when the heat exchange tube is welded, the positioning rod 53 is pulled outward, at this time the top plate 52 not under pressure lifts the heat exchange tube through the plurality of second springs 51, so that the heat exchange tube is taken out, through the above structure, the heat exchange tube can be easily taken out from the inside of the placing groove 18 after being welded with the sintering plate, the operator can complete the welding work more quickly and accurately, the operation is simple and fast, and the operation time required for taking out the heat exchanger after being fixedly installed is reduced.
[0029] As shown in Figure 1 and Figure 3As shown, the fumigation assembly 6 includes a fumigator 61; the fumigator 61 is installed on the side wall of the welding table 1; a fumigation tube 62 is fixedly connected to the middle of the fumigator 61; the end of the fumigation tube 62 is fixedly connected to the middle of the fixing block 32; the fixing block 32 and the rotating rod 33 are hollow; multiple fumigation holes 63 are opened in the middle of the connecting pipe 34; during operation, when the sintering plate and the heat exchange tube are welded, the fumigator 61 is turned on after being powered on. The fumes generated during welding are drawn in through the negative pressure airflow of the fumigator 61 through the multiple fumigation holes 63, and then enter the interior of the fumigation tube 62 through the rotating rod 33 and the fixing block 32. The fumigator 61 collects the fumes. The above structure can effectively collect the fumes and particulate matter during the welding process, reduce the pollution of the working environment caused by the direct emission of welding fumes, and reduce the harm of fumes to personnel in the working area.
[0030] like Figure 4 As shown, a rubber pad 7 is fixedly connected to the middle of the fixing plate 24; the rubber pad 7 is fixed to the side away from the top rod 21; during operation, when the heat exchanger is placed in the middle of the placement groove 18 and fixed by multiple fixing plates 24, the rubber pad 7 is in close contact with the surface of the heat exchanger. Through the above structure, the rubber pad 7 has good elasticity and sealing performance, which can make the fixing plate 24 in close contact with the surface of the heat exchange tube, increase the friction between the fixing plate 24 and the heat exchange tube, and increase the stability of the heat exchange tube during the welding process.
[0031] When working, the heat exchange pipe is placed inside the placing groove 18, fixed by the fixing assembly 2, the sintering plate is placed at the welding position of the heat exchange pipe, the support rod 19 is rotated, the sliding rod 111 is slid downward, the suction cup 112 sucks the sintering plate and fixes it at the specified position, the linear motor 10 is started, the adjusting frame 11 moves to the middle part, at this time the adjusting frame 11 controls the rotating disc 13 to move downward, the first driver 16 is started at the same time, the pinion 17 drives the gear 14 to rotate, the rotating disc 13 rotates in the middle part of the fixed frame 12, through the control system, the welding head 15 is first rotated to a point between the heat exchange pipe and the sintering plate, a point is first welded, then the rotating disc 13 is controlled to move upward, the first driver 16 drives the pinion 17 again to make the gear 14 rotate, four points between the heat exchange pipe and the sintering plate are fixed repeatedly for many times, then the sliding rod 111 is moved upward, the support rod 19 is rotated and reset, the welding head 15 is controlled to weld a circle around the sintering plate and the heat exchange pipe, after the welding is completed, the heat exchange pipe is lifted and taken out through the ejecting assembly 5, when the heat exchange pipe is placed in the middle part of the placing groove 18, the heat exchange pipe first contacts the surface of the jacks 21, when the jacks 21 are pressed, the jacks 21 move into the telescopic grooves 22, at the same time the first springs 23 are elastically contracted, the heat exchange pipe is pressed and fixed through the fixed plates 24, heat exchange pipes of different sizes are fixed, after the heat exchange pipe is placed inside the placing groove 18 and fixed, the second driver 31 is controlled to rotate its output end, the output end of the second driver 31 drives the rotating rod 33 to rotate in the middle part of the fixed block 32, at this time the connecting pipe 34 rotates with the rotating rod 33, the brush plate 35 passes through the end of the heat exchange pipe to clean the welding position, the connecting pipe 34 is rotated to one side and then rotated and reset again, so that the heat exchange pipe is welded, the heating wire 42 is controlled to be started, heat is generated on the surface of the heating wire 42, the heat is transmitted to the heat conduction plate 41, the heat is quickly transmitted to the inner side wall of the placing groove 18 through the heat conduction plate 41, when the heat exchange pipe is placed inside the placing groove 18, the welding position of the heat exchange pipe is preheated through the heat, when the heat exchange pipe is placed inside the placing groove 18, the lower end of the heat exchange pipe contacts the top plate 52 and presses it, the second springs 51 are elastically contracted, at this time the positioning rod 53 is pulled outward, the third spring 54 is elastically stretched, the positioning rod 53 is loosened and moves into the placing groove 18, the top plate 52 is blocked by the end of the positioning rod 53, when the heat exchange pipe is welded, the positioning rod 53 is pulled outward, at this time the top plate not under pressure lifts the heat exchange pipe through the second springs, so that the heat exchange pipe is taken out, in the process of welding the sintering plate and the heat exchange pipe, the smoke extractor 61 is powered on and started, the smoke generated during welding is sucked into the smoke extractor 61 through the negative pressure airflow of the smoke extractor 61, then enters the smoke pipe 62 through the rotating rod 33 and the fixed block 32, and is collected through the smoke extractor 61, when the heat exchanger is placed in the middle part of the placing groove 18 and fixed by the fixed plates 24, the rubber pad 7 is in close contact with the surface of the heat exchanger.
[0032] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. A sintered plate crack prevention welding device comprising a welding table (1); characterized in that: The welding table (1) middle part is provided with a placing groove (18); the middle part of the placing groove (18) is provided with a fixing assembly (2); the top of the welding table (1) is provided with a linear motor (10); the middle part of the linear motor (10) is provided with an adjusting frame (11); the middle part of the adjusting frame (11) is slidably connected with a fixing frame (12); the end of the fixing frame (12) is circularly arranged; the middle part of the fixing frame (12) is rotatably connected with a rotating disc (13); the outer wall of the rotating disc (13) is fixedly connected with a large gear (14); the middle part of the fixing frame (12) is provided with a first driver (16); the output end of the first driver (16) is fixedly connected with a small gear (17); the small gear (17) and the large gear (14) are meshingly arranged; the middle part of the rotating disc (13) is provided with a welding head (15); the welding head (15) penetrates through the middle part of the rotating disc (13); the middle part of the placing groove (18) is provided with an ejection assembly (5); the top of the welding table (1) is rotatably connected with a supporting rod (19); the middle part of the supporting rod (19) is slidably connected with a sliding rod (111); the end of the sliding rod (111) is fixedly connected with a suction disc (112).
2. The sintered plate anti-cracking welding device according to claim 1, characterized in that: The fixing assembly (2) comprises two groups of fixing plates (24); the fixing plates (24) are elastically arranged; two fixing plates (24) form a group; the two fixing plates (24) are oppositely arranged; the middle part of the fixing plate (24) is fixedly connected with a jacking rod (21); the middle part of the jacking rod (21) is slidably connected with a telescopic groove (22); the end of the jacking rod (21) is fixedly connected with a first spring (23); the end of the first spring (23) is fixedly connected with the telescopic groove (22).
3. The apparatus of claim 1, wherein: The top of the welding table (1) is fixedly connected with a fixing rod (3); the end of the fixing rod (3) is fixedly connected with a second driver (31); the output end of the second driver (31) is fixedly connected with a rotating rod (33); the top of the welding table (1) is fixedly connected with a fixing block (32); the top of the fixing block (32) is rotatably connected with the rotating rod (33); the middle part of the rotating rod (33) is fixedly connected with a connecting pipe (34); the bottom of the connecting pipe (34) is fixedly connected with a brush plate (35); the middle part of the connecting pipe (34) is provided with a smoke suction assembly (6).
4. The apparatus of claim 1, wherein: The top of the welding table (1) is provided with a preheating cavity (4); the preheating cavity (4) is arranged on the top of the placing groove (18); the inner wall of the preheating cavity (4) is fixedly connected with a heat conduction plate (41); the middle part of the preheating cavity (4) is provided with a heating wire (42).
5. The apparatus of claim 1, wherein: The ejection assembly (5) comprises a plurality of second springs (51); the second springs (51) are fixedly connected with the bottom of the placing groove (18); the ends of the second springs (51) are fixedly connected with a top plate (52); the middle part of the top plate (52) is slidably connected with the middle part of the placing groove (18); the middle part of the welding table (1) is slidably connected with a positioning rod (53); the end of the positioning rod (53) is fixedly connected with a third spring (54).
6. The sintered plate anti-cracking welding device according to claim 3, characterized in that: Said smoking assembly (6) includes a smoking device (61); the smoking device (61) is installed on the side wall of the welding table (1); the middle part of the smoking device (61) is fixedly connected with a smoking pipe (62); the end of the smoking pipe (62) is fixedly connected in the middle part of a fixed block (32); the fixed block (32) is hollowly arranged with a rotating rod (33); a plurality of smoking holes (63) are formed in the middle part of the connecting pipe (34).
7. The apparatus of claim 2 wherein: the apparatus further comprises a plurality of clamps for holding the sintered plate in place during the welding process. The middle part of the fixed plate (24) is fixedly connected with a rubber pad (7); the rubber pad (7) is fixedly connected on the side away from the ejector pin (21).