Welding device for pump shell production

Abstract

The invention discloses a pump shell production welding device and belongs to the technical field of welding equipment.The pump shell production welding device comprises a rack disc and curved clamping modules, the rack disc is fixedly arranged at the ground end, the multiple curved clamping modules are slidably assembled on the rack disc in the circumferential direction, and each curved clamping module comprises a carrier, a position adjusting frame and a cross-shaped rack; the carrier is arranged on the rack disc in a sleeving mode, a sliding frame is arranged at one end of the carrier, the position adjusting frame is movably assembled on the sliding frame, the middle rack is assembled on one side of the position adjusting frame, the cross-shaped rack is assembled on the middle rack, and a sliding plate used for clamping parts is arranged on one side of the cross-shaped rack. The curved clamping module can circularly move between the clamping station and the butt joint station so as to achieve positioning and butt joint of the to-be-welded part, meanwhile, the irregular pump shell can be rapidly clamped through the curved clamping module, the time for replacing a customized clamp is saved, and the comprehensive welding efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding equipment, and specifically relates to a welding device for pump housing production. Background Art

[0002] The production welding of pump housings is a complex process involving materials science, process control, and quality management, which requires comprehensive consideration of material properties, structural design, welding methods, and subsequent processing.

[0003] Chinese Patent CN118455739B discloses a welding device and its welding process for automotive water pump housings, which mainly consists of a clamping assembly, an inner butt joint welding assembly, and an outer butt joint welding assembly. Its welding object is an improved combined automotive water pump housing. The clamping assembly is used to position the combined automotive water pump housing and can drive it to perform a flipping action. The inner butt joint welding assembly is used to weld the inner butt joint of the combined automotive water pump housing, and the outer butt joint welding assembly is used to weld the outer butt joint of the combined automotive water pump housing; the inner butt joint welding assembly is used to weld the annular seam between the balance seat and the balance seat installation half pipe.

[0004] During the actual welding operation of the above device, it can only achieve the welding action of two groups of parts, and cannot meet the demand for butt welding of multiple parts. At the same time, when clamping irregular curved surface pump housing parts, the conventional clamping structure is prone to looseness on the curved surface, resulting in distorted welds and affecting welding quality. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the embodiments of the present invention is to provide a welding device for pump housing production to solve the problems in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A welding device for pump housing production includes a machine frame member, and the machine frame member includes a frame disk, a groove, and an external gear ring. The frame disk is fixedly arranged at the ground end, and the outer diameter end of the frame disk is provided with a groove and an external gear ring; The welding device for pump housing production includes a plurality of curved clamping modules. The plurality of curved clamping modules are slidably assembled on the frame disk along the circumferential direction. The curved clamping module includes a carrier assembly, an adjustment assembly, and a clamping arm assembly; The carrier assembly includes a carrier, a limit pin, an L-shaped support plate, and a sliding frame. The carrier is sleeved on the frame disk, and a limit pin is arranged at the inner diameter end of the carrier. The limit pin is slidably assembled in the groove in a limited manner. One end of the carrier is fixedly assembled with an L-shaped support plate, and a sliding frame is slidably arranged on the L-shaped support plate; The positioning component includes a positioning frame and a middle-mounted frame. The positioning frame is slidably assembled on the sliding frame, and the middle-mounted frame is rotatably assembled on one side of the positioning frame. The clamping arm component includes a cross-shaped frame, a sliding plate, and a first-layer plate. The cross-shaped frame is rotatably assembled on the middle-mounted frame. Two groups of sliding plates are slidably arranged on one side of the cross-shaped frame. The first-layer plate is arranged at one end of the sliding plate, and the two sliding plates move in opposite directions.

[0007] As a further solution of the present invention, the vehicle component further includes a bracket, a first driver, a driving gear, a guide rail, a bottom-mounted groove, an electric telescopic rod, and a rod head. The bracket is fixedly assembled on the vehicle. One end of the first driver is assembled in the bracket, and the other end of the first driver is assembled with a driving gear. The driving gear is meshed and assembled on the external tooth ring. The guide rail is assembled on the L-shaped support plate. The bottom-mounted groove is further arranged at the bottom of the sliding frame, and the bottom-mounted groove is limited and slidably assembled on the guide rail. An electric telescopic rod is also fixedly assembled on the sliding frame, and the rod head on one side of the electric telescopic rod is fixedly assembled on the L-shaped support plate.

[0008] As a further solution of the present invention, the positioning component further includes a guide post, a second driver, an axle frame, a third driver, a lateral driving wheel, a synchronous belt, a lateral transmission wheel, and a positioning arm. The guide post is fixedly arranged on the sliding frame, and the positioning frame is slidably assembled on the guide post. One end of the lateral transmission wheel is fixedly assembled on the sliding frame, and the movable shaft at the other end of the lateral transmission wheel is assembled on the positioning frame. An axle frame is further arranged at the top of the positioning frame, and the lateral transmission wheel is fixedly assembled on the axle frame by a fixed shaft. The third driver is fixedly arranged on one side of the axle frame, and lateral driving wheels are assembled at both ends of the third driver. One end of the synchronous belt is in transmission connection with the lateral driving wheel, and the other end of the synchronous belt is in transmission connection with the lateral transmission wheel. One end of the positioning arm is fixedly connected to the lateral transmission wheel, and the other end of the positioning arm is fixedly connected to the middle-mounted frame.

[0009] As a further solution of the present invention, the positioning component further includes a first ring gear disk, a second ring gear disk, and a middle-mounted gear disk. The first ring gear disk is fixedly arranged on one side of the middle-mounted frame. The second ring gear disk is rotatably assembled on one side of the middle-mounted frame. The middle-mounted gear disk is fixedly arranged between the first ring gear disk and the second ring gear disk, and the middle-mounted gear disk is meshed and connected to the first ring gear disk and the second ring gear disk respectively.

[0010] As a further solution of the present invention, the clamping arm assembly further includes a reversing gear, a driven rack, a fourth driver, a fifth driver, a pressing block and a pressing frame. The reversing gear is fixedly assembled on the cross frame, one end of the driven rack is fixedly assembled on the sliding plate, the other end of the driven rack is meshed with the reversing gear, the fourth driver is fixedly arranged on one side of the cross frame and is in transmission connection with the reversing gear, the fifth driver is fixedly arranged on one side of the cross frame and is in transmission connection with the second ring gear disc. A plurality of the pressing blocks are arranged in an array on the first layer plate, and the pressing blocks are slidably assembled in the first layer plate. A pressing frame is also fixedly assembled on one side of a plurality of pressing blocks.

[0011] As a further solution of the present invention, the clamping arm assembly further includes a second layer plate, an air guide valve, an air pipe, a piston push rod, a main pipe and an inclined cone block. The second layer plate is fixedly arranged on one side of the first layer plate. A plurality of the air guide valves are fixedly assembled at one end of the second layer plate. One end of the air pipe is communicated with the air guide valve, and the other end of the air pipe is slidably inserted with a piston push rod. The main pipe is communicated with a plurality of air guide valves. One end of the inclined cone block is fixedly connected with the pressing frame, and the other end of the inclined cone block is elastically connected with the second layer plate.

[0012] As a further solution of the present invention, the pump housing production welding device further includes a pump air assembly. The pump air assembly includes a pump air cylinder, a piston push rod, a top support block, a main valve core and an external air pipe. The pump air cylinder is fixedly arranged on one side of the second layer plate. A piston push rod is slidably assembled in the pump air cylinder. A top support block is fixedly assembled at one end of the piston push rod. The top support block is arranged towards one side of the inclined cone block. A main valve core is also assembled on the pump air cylinder. The main valve core is communicated with the main pipe. An external air pipe is also communicated with one side of the pump air cylinder.

[0013] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art: By circumferentially arranging a plurality of curved clamping modules on one side of the rack disc, the present invention can enable the curved clamping modules to circulate between the clamping station and the docking station to realize the positioning and butt joint of the parts to be welded. At the same time, the curved clamping modules can quickly clamp the irregular pump housing, saving the time for replacing customized jigs and improving the comprehensive welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a pump housing production welding device provided in an embodiment of the present invention.

[0015] Figure 2 It is a structural schematic diagram of a pump housing production welding device provided in an embodiment of the present invention.

[0016] Figure 3 For Figure 2 the structural schematic diagram of the reference sign A in

[0017] Figure 4 is Figure 2 a schematic structural view of the structure of reference numeral B in

[0018] Figure 5 a schematic side view of a pump housing production welding device provided in an embodiment of the present invention.

[0019] Figure 6 is Figure 5 a schematic structural view of the structure of reference numeral C in

[0020] Reference numerals: 1 - machine frame member, 101 - frame disk, 102 - groove, 103 - external gear ring, 2 - carrier assembly, 201 - carrier, 202 - limit pin, 203 - bracket, 204 - first driver, 205 - driving gear, 206 - L-shaped support plate, 207 - guide rail, 208 - sliding frame, 209 - bottom groove, 210 - electric telescopic rod, 211 - rod head, 3 - position adjustment assembly, 301 - position adjustment frame, 302 - guide post, 303 - second driver, 304 - shaft frame, 305 - third driver, 306 - lateral driving wheel, 307 - synchronous belt, 308 - lateral transmission wheel, 309 - position adjustment arm, 310 - middle frame, 311 - first ring gear disk, 4 - clamping arm assembly, 401 - cross frame, 402 - slide plate, 403 - reversing gear, 404 - driven rack, 405 - fourth driver, 406 - first layer plate, 407 - fifth driver, 408 - pressing block, 409 - pressing frame, 410 - second layer plate, 411 - air guide valve, 412 - air pipe, 413 - piston pressing rod, 414 - main pipe, 415 - inclined cone block, 5 - pump air assembly, 501 - pump air cylinder, 502 - piston push rod, 503 - top support block, 504 - main valve core, 505 - external air pipe. Detailed implementation manners

[0021] To more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Please refer to Figures 1-6, in a production welding device for a pump housing according to an embodiment of the present invention, the production welding device for the pump housing has opposite first direction x, second direction y, and third direction z. The production welding device for the pump housing includes a machine frame member 1, and the machine frame member 1 includes a frame disk 101, a groove 102, and an external gear ring 103. The frame disk 101 is fixedly arranged at the ground end, and the outer diameter end of the frame disk 101 is provided with a groove 102 and an external gear ring 103; the production welding device for the pump housing includes a plurality of curved clamping modules, and the plurality of curved clamping modules are slidably assembled on the frame disk 101 in the circumferential direction. The curved clamping module includes a carrier assembly 2, an adjustment assembly 3, and a clamping arm assembly 4; the carrier assembly 2 includes a carrier 201, a limit pin 202, an L-shaped support plate 206, and a sliding frame 208. The carrier 201 is sleeved on the frame disk 101, and a limit pin 202 is arranged at the inner diameter end of the carrier 201. The limit pin 202 is slidably assembled in the groove 102 in a limited manner. One end of the carrier 201 is fixedly assembled with an L-shaped support plate 206, and a sliding frame 208 is slidably arranged on the L-shaped support plate 206; the adjustment assembly 3 includes an adjustment frame 301 and a central frame 310. The adjustment frame 301 is slidably assembled on the sliding frame 208, and the central frame 310 is rotationally assembled on one side of the adjustment frame 301 along the xoz plane; the clamping arm assembly 4 includes a cross frame 401, a sliding plate 402, and a first layer plate 406. The cross frame 401 is rotationally assembled on the central frame 310 along the yoz plane. Two groups of sliding plates 402 are slidably arranged on one side of the cross frame 401. A first layer plate 406 is arranged at one end of the sliding plate 402, and the two groups of sliding plates 402 move in opposite directions.

[0023] In actual application of this embodiment, during the actual operation of the production welding device for the pump housing, on one side of the frame disk 101, a plurality of curved clamping modules have a clamping station and a docking station in the circumferential direction. Here, the lowest point position in the circumferential direction is set as the clamping station. The pump housing parts to be welded are placed at the ground end and are positioned and clamped on any curved clamping module at the clamping station. When there are parts clamped on this curved clamping module, a plurality of curved clamping modules rotate simultaneously in the circumferential direction, so that the curved clamping module without parts rotates to the clamping station for material clamping, and the curved surface parts with irregular surfaces are stably clamped by the curved clamping module. When a plurality of curved clamping modules all hold parts, by controlling the offset rotation of the parts in the curved clamping module, a plurality of parts can be positioned and butted at the docking station, and the subsequent welding operation can be carried out, so that the curved parts with irregular outer surfaces can be butted after stable clamping, saving the time for replacing the fixture.

[0024] Please refer to Figure 3, in a preferred embodiment of the present invention, the vehicle component 2 further includes a bracket 203, a first driver 204, a driving gear 205, a guide rail 207, a bottom slot 209, an electric telescopic rod 210 and a rod head 211. The bracket 203 is fixedly assembled on the vehicle 201. One end of the first driver 204 is assembled in the bracket 203, and the other end of the first driver 204 is assembled with the driving gear 205. The driving gear 205 is meshed and assembled on the external tooth ring 103. The guide rail 207 is assembled on the L-shaped support plate 206. A bottom slot 209 is further provided at the bottom of the sliding frame 208. The bottom slot 209 is slidably assembled on the guide rail 207 in a limited manner. An electric telescopic rod 210 is fixedly assembled on the sliding frame 208. The rod head 211 on one side of the electric telescopic rod 210 is fixedly assembled on the L-shaped support plate 206.

[0025] In actual application of this embodiment, when the first driver 204 is in the driving state, it can drive the driving gear 205 to rotate, so that the driving gear 205 drives the vehicle 201 to move along the yoz plane during the meshing connection with the external tooth ring 103. The sliding frame 208 is slidably assembled on the guide rail 207 in a limited manner along the first direction x through the bottom slot 209. The rod head 211 at one end of the electric telescopic rod 210 can drive the sliding frame 208 to move in the first direction x during the telescopic process, so that the curved clamping module has freedom in the first direction x.

[0026] Please refer to Figure 3 and Figure 6 , in a preferred embodiment of the present invention, the position adjustment component 3 further includes a guide post 302, a second driver 303, an axle bracket 304, a third driver 305, a lateral driving wheel 306, a synchronous belt 307, a lateral transmission wheel 308 and a position adjustment arm 309. The guide post 302 is fixedly arranged on the sliding frame 208. The position adjustment frame 301 is slidably assembled on the guide post 302. One end of the lateral transmission wheel 308 is fixedly assembled on the sliding frame 208, and the movable shaft at the other end of the lateral transmission wheel 308 is assembled on the position adjustment frame 301. An axle bracket 304 is further provided at the top of the position adjustment frame 301. The lateral transmission wheel 308 is fixedly assembled on the axle bracket 304 in a fixed-axis manner. The third driver 305 is fixedly arranged on one side of the axle bracket 304, and lateral driving wheels 306 are assembled at both ends of the third driver 305. One end of the synchronous belt 307 is in transmission connection with the lateral driving wheel 306, and the other end of the synchronous belt 307 is in transmission connection with the lateral transmission wheel 308. One end of the position adjustment arm 309 is fixedly connected to the lateral transmission wheel 308, and the other end of the position adjustment arm 309 is fixedly connected to the middle mounting frame 310.

[0027] In actual application of this embodiment, the positioning frame 301 is slidably assembled on the guide post 302 along the third direction z. The second driver 303 can drive the positioning frame 301 to move along the third direction z, so that the curved clamping module has freedom in the third direction z. At this time, the curved clamping module has any freedom of linear movement in the xoz plane. A lateral transmission wheel 308 is fixedly assembled on the shaft frame 304, and a third driver 305 on one side of the shaft frame 304 is in transmission connection with the lateral transmission wheel 308 through a lateral driving wheel 306 and a synchronous belt 307, so that the third driver 305 can drive the positioning arm 309 to rotate in the driving state. The end of the positioning arm 309 is fixedly connected to the middle-mounted frame 310, thereby driving the middle-mounted frame 310 to rotate with the positioning arm 309 as the axis, so that the curved clamping module has the freedom of tilting in the xoz plane.

[0028] Further, the positioning assembly 3 further includes a first ring gear 311, a second ring gear 312 and a middle-mounted gear 313. The first ring gear 311 is fixedly arranged on one side of the middle-mounted frame 310. The second ring gear 312 is rotatably assembled on one side of the middle-mounted frame 310 along the yoz plane. The middle-mounted gear 313 is fixedly arranged between the first ring gear 311 and the second ring gear 312, and the middle-mounted gear 313 is respectively meshed with the first ring gear 311 and the second ring gear 312. The first ring gear 311 is fixedly assembled on one side of the middle-mounted frame 310. The second ring gear 312 is rotatably sleeved on one side of the middle-mounted frame 310. The middle-mounted gear 313 is fixedly assembled on one side of the middle-mounted frame 310, and both the first ring gear 311 and the second ring gear 312 are meshed with the middle-mounted gear 313, so that the second ring gear 312 drives the cross frame 401 to rotate around the axis during rotation, thereby realizing the rotational freedom of the curved clamping module in the yoz plane.

[0029] Please refer to Figure 4 , in a preferred embodiment of the present invention, the clamping arm assembly 4 further includes a reversing gear 403, a driven rack 404, a fourth driver 405, a fifth driver 407, a pressing block 408 and a pressing frame 409. The reversing gear 403 is fixedly assembled on the cross frame 401. One end of the driven rack 404 is fixedly assembled on the slide plate 402, and the other end of the driven rack 404 is meshed with the reversing gear 403. The fourth driver 405 is fixedly arranged on one side of the cross frame 401 and is in transmission connection with the reversing gear 403. The fifth driver 407 is fixedly arranged on one side of the cross frame 401 and is in transmission connection with the second ring gear 312. A plurality of the pressing blocks 408 are arranged in an array on the first layer plate 406, and the pressing blocks 408 are slidably assembled in the first layer plate 406. A pressing frame 409 is also fixedly assembled on one side of a plurality of pressing blocks 408.

[0030] In actual application of this embodiment, the reversing gear 403 is fixedly arranged on the cross frame 401. When the fourth driver 405 drives the reversing gear 403 to rotate in the driving state, since the driven rack 404 is fixedly assembled on one side of the slide plate 402, and the two driven racks 404 are both engaged with the reversing gear 403, the reversing gear 403 drives the two driven racks 404 and the slide plate 402 to move in the third direction z during rotation, so as to adjust the distance between the two first-layer plates 406, so that the two first-layer plates 406 can be switched between the open state and the locked state. When the two first-layer plates 406 are in the open state and the curved clamping module is on the clamping station side, the open first-layer plates 406 can clamp the pump housing parts to be welded, so that the pump housing parts complete the initial clamping at the clamping station. At this time, some pressing blocks 408 on the first-layer plates 406 are in contact with the irregular surface of the pump housing parts, and the pump housing parts are in the non-clamped state at this time.

[0031] Please refer to Figure 4 , in a preferred embodiment of the present invention, the clamping arm assembly 4 further includes a second-layer plate 410, an air guide valve 411, an air pipe 412, a piston push rod 413, a main pipe 414 and an inclined cone block 415. The second-layer plate 410 is fixedly arranged on one side of the first-layer plate 406. A plurality of the air guide valves 411 are fixedly assembled at one end of the second-layer plate 410. One end of the air pipe 412 is communicated with the air guide valve 411, and the piston push rod 413 is slidably inserted at the other end of the air pipe 412. The main pipe 414 is communicated with a plurality of air guide valves 411. One end of the inclined cone block 415 is fixedly connected to the pressing frame 409, and the other end of the inclined cone block 415 is elastically connected to the second-layer plate 410.

[0032] In actual application of this embodiment, the plurality of air guide valves 411 arranged on the second-layer plate 410 are respectively communicated with the plurality of air pipes 412, and the piston push rod 413 is assembled at the end of the air pipe 412. When a plurality of pressing blocks 408 on the two first-layer plates 406 are in the non-clamped state, air is pumped into one side of the main pipe 414, so that the piston push rods 413 in the plurality of air pipes 412 extend under the action of gas pressure and abut against the irregular surface of the pump housing. Since the plurality of air pipes 412 are pumped with the same air source, it can be ensured that the plurality of piston push rods 413 abut against the outer surface of the parts simultaneously under the action of gas pressure until the gas pressure on one side of the main pipe 414 reaches the preset value. At this time, the pump housing parts are in the completely clamped state.

[0033] Please refer to Figure 4, in a preferred embodiment of the present invention, the pump housing production and welding device further includes a pump air component 5. The pump air component 5 includes a pump air cylinder 501, a piston push rod 502, a top support block 503, a main valve core 504, and an external air pipe 505. The pump air cylinder 501 is fixedly arranged on one side of the second layer plate 410. A piston push rod 502 is slidably assembled in the pump air cylinder 501. One end of the piston push rod 502 is fixedly assembled with a top support block 503. The top support block 503 is arranged towards the inclined cone block 415. A main valve core 504 is also assembled on the pump air cylinder 501. The main valve core 504 is communicated with the main pipe 414. An external air pipe 505 is also communicated on one side of the pump air cylinder 501.

[0034] In actual application of this embodiment, the external air pipe 505 connected to the end of the pump air cylinder 501 is used to connect to an external air source. The structure of the air source is not specifically limited here. And during the air pumping process of the external air pipe 505, the piston inside the pump air cylinder 501 drives the piston push rod 502 to move. While the piston push rod 502 drives the top support block 503 on one side of it to move, the air inside the pump air cylinder 501 is pumped into the main pipe 414 through the main valve core 504. And when the top support block 503 abuts against the inclined surface on one side of the inclined cone block 415, it can push the inclined cone block 415 to move in the positive direction of the third direction z, so that the inclined cone block 415 pulls the pressing frame 409 and several pressing blocks 408 to move synchronously, and further enables several pressing blocks 408 to be hidden and contracted between the first layer plate 406 and the second layer plate 410.

[0035] In the above embodiment of the present invention, a pump housing production and welding device is provided. By circumferentially arranging several curved clamping modules on one side of the frame disk 101, the curved clamping modules can circularly move between the clamping station and the docking station to realize the positioning and butt joint of the parts to be welded. At the same time, the curved clamping modules can quickly clamp the irregular pump housing, saving the time for replacing customized jigs and improving the comprehensive welding efficiency.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pump casing production welding device, characterized in that: The pump housing production welding device comprises: A frame member, the frame member comprising a frame plate, a groove and an outer gear ring, the frame plate is fixedly arranged at the ground end, and the outer diameter end of the frame plate is provided with a groove and an outer gear ring; The pump housing production welding device comprises a plurality of curved clamping modules, which are slidably assembled on the frame plate along the circumferential direction, and the curved clamping modules comprise a carrier assembly, a positioning assembly and a clamping arm assembly; The carrier assembly includes a carrier, a limit pin, an L-shaped support plate and a sliding frame. The carrier is sleeved on the frame plate, and a limit pin is provided at the inner diameter end of the carrier. The limit pin is limitedly slidably assembled in the groove. An L-shaped support plate is fixedly assembled at one end of the carrier, and a sliding frame is slidably arranged on the L-shaped support plate. The position adjustment assembly includes a position adjustment frame and a middle frame, wherein the position adjustment frame is slidably mounted on the sliding frame, and the middle frame is rotatably mounted on one side of the position adjustment frame; The clamping arm assembly includes a cross frame, a slide plate and a first layer plate. The cross frame is rotatably mounted on the middle frame. Two groups of slide plates are slidably arranged on one side of the cross frame. The first layer plate is arranged at one end of the slide plate. The two groups of slide plates move in opposite directions.

2. A pump casing production welding device according to claim 1, characterized in that: The carrier assembly also includes a bracket, a first driver, a driving gear, a guide rail, a bottom groove, an electric telescopic rod and a rod head. The bracket is fixedly mounted on the carrier, one end of the first driver is mounted in the bracket, and the other end of the first driver is equipped with a driving gear, and the driving gear is meshingly mounted on the outer gear ring. The guide rail is mounted on an L-shaped support plate, and a bottom groove is also provided at the bottom of the sliding frame. The bottom groove is limitedly slidably mounted on the guide rail, and the sliding frame is also fixedly mounted with an electric telescopic rod, and the rod head on one side of the electric telescopic rod is fixedly mounted on the L-shaped support plate.

3. A pump casing production welding device according to claim 1, characterized in that: The positioning assembly also includes a guide column, a second driver, an axle frame, a third driver, a lateral driving wheel, a synchronous belt, a lateral transmission wheel and a positioning arm. The guide column is fixedly arranged on the sliding frame, and the positioning frame is slidably assembled on the guide column. One end of the lateral transmission wheel is fixedly assembled on the sliding frame, and a movable shaft at the other end of the lateral transmission wheel is assembled on the positioning frame. A shaft frame is also arranged on the top of the positioning frame, and a lateral transmission wheel is assembled on the fixed shaft in the shaft frame. The third driver is fixedly arranged on one side of the shaft frame, and lateral driving wheels are assembled on both ends of the third driver. One end of the synchronous belt is connected to the lateral driving wheel for transmission, and the other end of the synchronous belt is connected to the lateral transmission wheel for transmission. One end of the positioning arm is fixedly connected to the lateral transmission wheel, and the other end of the positioning arm is fixedly connected to the central frame.

4. A pump casing production welding device according to claim 1, characterized in that: The positioning assembly also includes a first ring gear plate, a second ring gear plate and a middle gear plate. The first ring gear plate is fixedly arranged on one side of the middle frame, the second ring gear plate is rotatably assembled on one side of the middle frame, the middle gear plate is fixedly arranged between the first ring gear plate and the second ring gear plate, and the middle gear plate is respectively meshed with the first ring gear plate and the second ring gear plate.

5. A pump casing production welding device according to claim 1, characterized in that: The clamping arm assembly also includes a reversing gear, a driven rack, a fourth driver, a fifth driver, a pressure block and a pressure frame. The reversing gear fixed axis is assembled on the cross frame, one end of the driven rack is fixedly assembled on the slide, and the other end of the driven rack is meshed with the reversing gear. The fourth driver is fixedly arranged on one side of the cross frame and is transmission-connected with the reversing gear. The fifth driver is fixedly arranged on one side of the cross frame and is transmission-connected with the second ring gear disk. Several of the pressure blocks are arrayed on the first layer of plates, and the pressure blocks are slidably assembled in the first layer of plates. Pressure frames are also fixedly assembled on one side of several pressure blocks.

6. A pump casing production welding device according to claim 1, characterized in that: The clamp arm assembly also includes a second layer plate, an air guide valve, an air pipe, a piston pressure rod, a main pipe and an inclined cone block. The second layer plate is fixedly arranged on one side of the first layer plate, and several air guide valves are fixedly assembled on one end of the second layer plate. One end of the air pipe is connected to the air guide valve, and a piston pressure rod is slidably inserted at the other end of the air pipe. The main pipe is connected to several air guide valves, one end of the inclined cone block is fixedly connected to the pressure frame, and the other end of the inclined cone block is elastically connected to the second layer plate.

7. A pump casing production welding device according to claim 1, characterized in that: The pump housing production welding device also includes a pump air assembly, which includes a pump air cylinder, a piston push rod, a top support block, a main valve core and an external air pipe. The pump air cylinder is fixedly arranged on one side of the second layer plate, and a piston push rod is slidably assembled in the pump air cylinder. A top support block is fixedly assembled at one end of the piston push rod, and the top support block is arranged toward the side of the oblique cone block. The pump air cylinder is also equipped with a main valve core, and the main valve core is connected to the main pipe. One side of the pump air cylinder is also connected to an external air pipe.

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