CN116441847A - Spacing frock of stainless steel pipe welding - Google Patents

Abstract

The utility model discloses a stainless steel pipe welding limiting tool which comprises a processing table, wherein a supporting frame is fixedly connected to the processing table, a welding assembly is connected to the supporting frame in a sliding manner, and a driving assembly for driving the welding assembly to slide is arranged on the supporting frame; the processing table is provided with a group of clamping assemblies for clamping the steel pipe body; the processing bench is provided with a driving unit, and the driving unit drives the clamping assembly to clamp and fix the steel pipe body through the transmission assembly. Firstly, the stainless steel tube to be welded is arranged inside the clamping assembly, then the clamping assembly is driven to be close to each other through the driving unit and the transmission assembly, so that the steel tube to be fixed can be fixed, the stability of the steel tube during welding is improved, the condition that the stainless steel tube is loose in the welding process is avoided, after the welding is finished, the driving unit drives the clamping assembly to be far away from each other, and therefore the stainless light tube after the welding is finished is convenient to detach, and the effect is good.

Description

A stainless steel pipe welding limit tooling

technical field

The invention relates to the technical field of stainless steel pipes, in particular to a welding limit tool for stainless steel pipes.

Background technique

Stainless steel pipe fittings are a kind of pipe fittings. They are made of stainless steel, so they are called stainless steel pipe fittings. They include: stainless steel elbows, stainless steel tees, stainless steel crosses, stainless steel reducers, stainless steel caps, etc., according to the connection method. It is divided into four categories: socket-type stainless steel pipe fittings, threaded stainless steel pipe fittings, flanged stainless steel pipe fittings and welded stainless steel pipe fittings. Stainless steel pipe fittings are a general term for various stainless steel pipeline connection workpieces, which can be divided into different categories according to shape, use, and connection methods. . Stainless steel pipe fittings have the characteristics of easy installation, high performance and durability, and are widely used in various pipeline construction and installation. As we all know, in the process of production and processing, stainless steel pipe fittings need to be welded to a specified length according to the requirements, and the stainless steel pipe fitting welding device is a device for welding stainless steel pipe fittings, which has been widely used in the field of stainless steel pipe fittings production use. There are many sources of energy for modern welding, including gas flames, electric arcs, lasers, electron beams, friction, and ultrasound. In addition to being used in factories, welding can also be performed in a variety of environments, such as the field, underwater and space; strong light will be generated during the welding process, so no matter where it is, welding may bring danger to the operator, so in Proper protective measures must be taken when welding.

In the prior art, for example, the application number is 201720669891.9, which is a Chinese utility model patent named a stainless steel pipe welding positioning device, which discloses a stainless steel pipe welding positioning device, including a first bracket, a second bracket, a third bracket and a first bracket. Four brackets; the third bracket is connected to the first bracket; the fourth bracket is connected to the second bracket; the first positioning of the first stainless steel pipe is formed between the first bracket and the second bracket Space; between the first bracket and the third bracket, and between the second bracket and the fourth bracket, a second positioning space for the second stainless steel tube is formed; between the first bracket and the second bracket, a There is a space for welding between the first stainless steel pipe and the second stainless steel pipe; the first bracket is also provided with a plane.

The above patent not only facilitates the positioning between the first stainless steel pipe and the second stainless steel pipe, but also does not affect the welding. After the welding is completed, the welding positioning device for the stainless steel pipe can be used as an auxiliary structure to strengthen the first stainless steel pipe and the second stainless steel pipe. The connection strength between them. However, in the actual welding process of the steel pipe, the steel pipe needs to be fixed, otherwise the steel pipe is prone to loosening, thereby affecting the accuracy of the welding process. However, in the prior art, different clamping parts need to be used to weld different steel pipes to Steel pipe is fixed, and there is certain deficiency.

Contents of the invention

The object of the present invention is to provide a stainless steel pipe welding limit tool to solve the problems raised in the above background technology.

In order to achieve the above object, the present invention provides the following technical solutions: a stainless steel pipe welding limit tool, including a processing table, a support frame is fixedly connected to the processing table, a welding assembly is slidably connected to the support frame, and the support A driving assembly for driving the welding assembly to slide is arranged on the frame; a set of clamping assemblies for clamping the steel pipe body is arranged on the processing table; a driving unit is arranged on the processing table, and the driving unit passes through the transmission assembly The clamping assembly is driven to clamp and fix the steel pipe body.

Further, the clamping assembly includes two clamping plates that slide towards each other, each of the bottoms is fixedly connected with a bearing block, and the processing table is rotatably connected with a two-way screw rod, and each of the bearing blocks is respectively The two ends of the two-way screw rod are threaded; multiple groups of return springs are arranged between the two bearing blocks.

Further, the transmission unit includes a toothed plate slidingly connected to the processing table, straight gears are arranged on the two bidirectional screw rods, and both the spur gears are meshed with the toothed plate; the bottom of the toothed plate is fixedly connected There is a limiting block, a limiting groove is provided on the processing table, the limiting block is slidably connected in the limiting groove, and a connecting spring is arranged between the limiting block and the limiting groove.

Further, the drive unit includes a threaded rod rotatably connected to the processing table, a drive frame is slidably connected to the processing table, and the threaded rod is threadedly connected to the drive frame; a drive block is fixedly connected to the drive frame, A force-bearing block is fixedly connected to the tooth plate, and the driving block abuts against the force-bearing block.

Further, a driving handle is fixedly connected to the threaded rod, and a locking member is arranged between the driving handle and the processing table.

Further, the locking assembly includes a locking gear fixedly connected to the threaded rod, an arc-shaped plate is slidably connected to the processing table, and multiple sets of locking grooves are provided on the arc-shaped plate, and the locking The groove and the locking gear snap fit.

Further, a chute is provided on the processing table, and a connecting plate is slidably connected in the chute, and the connecting plate is fixedly connected with the arc-shaped plate; a locking spring is arranged between the connecting plate and the chute, The elastic force of the locking spring drives the locking groove to engage with the locking gear; a lifting rod is fixedly connected to the arc-shaped plate, and the lifting rod drives the arc-shaped plate to slide.

Further, the welding assembly includes a servo cylinder, a bearing plate is arranged at the bottom of the servo cylinder, an electric welding machine is installed on the supporting plate, and an welding rod is clamped at the end of the electric welding machine.

Further, the drive assembly includes a drive screw that is rotatably connected to the frame, and a threaded sleeve is threaded on the drive screw, and the threaded sleeve is fixedly connected with the servo cylinder through a fixing plate; There is a servo motor, and the output shaft of the servo motor is coaxially connected with the driving screw rod.

A control box is installed on the processing table.

Compared with the prior art, the beneficial effect of the present invention is: the stainless steel pipe welding limit tool, through the cooperation between the processing table, the support frame, the welding assembly, the driving assembly, the clamping assembly and the driving unit, so when in use , first install the stainless steel pipe to be welded inside the clamping assembly, and then drive the clamping assembly close to each other through the drive unit and transmission assembly, so that the steel pipe to be fixed can be fixed, the stability of the steel pipe during welding can be improved, and the welding The stainless steel tube is loose during the process, and at the same time, after the welding is completed, the drive unit drives the clamping components away from each other, so that the stainless steel tube after welding can be easily disassembled, which can further improve the practicability and use effect of the limit tooling good.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings that are required in the embodiments. Obviously, the accompanying drawings in the following description are only described in the present invention For some embodiments of the present invention, those skilled in the art can also obtain other drawings according to these drawings.

FIG. 1 is a schematic diagram of the overall structure provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of another perspective of the whole provided by the embodiment of the present invention;

Fig. 3 is a schematic diagram of a partial structure of a clamping assembly provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a drive unit provided by an embodiment of the present invention;

Fig. 5 is a structural schematic diagram of the connection mode between the transmission unit and the clamping assembly provided by the embodiment of the present invention;

6 is a schematic diagram of a partial structure of a transmission unit provided by an embodiment of the present invention;

Fig. 7 is a schematic diagram of a partial structure of a clamping assembly provided by an embodiment of the present invention;

Fig. 8 is a structural schematic diagram of the connection mode of the driving drive and the welding assembly provided by the embodiment of the present invention;

FIG. 9 is a schematic diagram of a partial structure of a drive unit provided by an embodiment of the present invention;

Fig. 10 is a schematic diagram of a partial structure of a locking member provided by an embodiment of the present invention;

FIG. 11 is a schematic diagram of the enlarged structure of area A in FIG. 2 .

Description of Reference Signs: 1. Processing table; 2. Support frame; 3. Welding assembly; 301. Servo cylinder; 302. Carrying plate; 303. Welding rod; 4. Clamping component; 401. Clamping plate; ; 403, two-way screw; 404, return spring; 5, drive assembly; 501, servo motor; 502, drive screw; 503, thread sleeve; 6, steel pipe body; 7, transmission unit; 701, tooth plate; Spur gear; 703, limit block; 8, drive unit; 801, force block; 802, drive block; 803, drive frame; 804, threaded rod; 805, drive handle; 9, locking piece; 901, arc Plate; 902, locking groove; 903, connecting plate; 904, locking spring; 905, lifting rod; 906, locking gear; 10, control box.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-11, the present invention provides a technical solution: a stainless steel pipe welding limit tool, including a processing table 1, a support frame 2 is fixedly connected to the processing table 1, and a welding assembly 3 is slidably connected to the support frame 2 , the support frame 2 is provided with a driving assembly 5 for driving the welding assembly 3 to slide; the processing table 1 is provided with a group of clamping assemblies 4 for clamping the steel pipe body 6; the processing table 1 is provided with a driving unit 8, which drives The unit 8 drives the clamping component 4 to clamp and fix the steel pipe body 6 through the transmission component.

Specifically, the stainless steel pipe welding limit tooling includes a processing table 1, wherein a plurality of sets of support legs are arranged at the bottom of the processing table 1, and an anti-skid pad is provided on the bottom of each support leg to improve the stability of the grinding device. The effect is good. Wherein a support frame 2 is fixedly connected to the processing table 1, and a welding assembly 3 is slidably connected to the support frame 2. By sliding the welding assembly 3 on the support frame 2, the position of the welding assembly 3 can be adjusted according to the needs of different positions. So as to meet the needs of steel pipe welding in different positions. Wherein, a driving assembly 5 for driving the welding assembly 3 to slide is arranged on the support frame 2. By setting the driving assembly 5, it is convenient to drive the welding assembly 3 to slide through the driving assembly 5, improve the work efficiency during welding, and have good use effect. Wherein, a set of clamping assemblies 4 for clamping the steel pipe body 6 is provided on the processing table 1. By setting a set of clamping assemblies 4, specifically, there can be two clamping assemblies 4, and the two clamping assemblies 4 will The steel pipe that needs to be fixed is fixed to improve the stability of the steel pipe during welding, and the use effect is good. Among them, stainless steel pipes are respectively clamped and fixed on the two clamping components 4, which is convenient for the installation of the stainless steel tubes, and the use effect is good; wherein a driving unit 8 is arranged on the processing table 1, and the driving unit 8 drives the clamping components 4 to the steel pipes through the transmission component. The main body 6 is clamped and fixed, so when in use, the clamping components 4 are driven close to each other through the drive unit 8 and the transmission component, so that the steel pipes that need to be fixed can be fixed, and the stability of the steel pipes during welding can be improved. At the same time, after the welding is completed , the driving unit 8 drives the clamping components 4 away from each other, so as to facilitate the disassembly of the stainless steel tube after welding, and the use effect is good.

The beneficial effects of the present invention are: the stainless steel pipe welding limit tool, through the cooperation between the processing table, the support frame, the welding assembly, the driving assembly, the clamping assembly and the driving unit, so when in use, the stainless steel pipe that needs to be welded The pipe is installed inside the clamping assembly, and then the clamping assembly is driven close to each other through the drive unit and the transmission assembly, so that the steel pipe that needs to be fixed can be fixed, the stability of the steel pipe during welding is improved, and the stainless steel pipe is prevented from loosening during the welding process. At the same time, after the welding is completed, the drive unit drives the clamping components away from each other, so that the stainless steel tube after welding can be easily disassembled, and the practicability of the position-limiting tool can be further improved, and the use effect is good.

In the embodiment provided by the present invention, wherein the clamping assembly 4 includes two clamping plates 401 that slide towards each other, each bottom is fixedly connected with a bearing block 402, and the processing table 1 is rotatably connected with a two-way screw rod 403, each The bearing blocks 402 are respectively threaded on two ends of the two-way screw rod 403 . Multiple sets of return springs 404 are arranged between the two bearing blocks 402 .

Wherein the clamping assembly 4 includes two clamping plates 401 sliding towards each other, each bottom is fixedly connected with a bearing block 402, and the processing table 1 is rotatably connected with a two-way screw rod 403, and each bearing block 402 is respectively threaded on a two-way On the two ends of screw mandrel 403; There are multiple sets of return springs 404 arranged between the two bearing blocks 402, so when in use, when the two-way screw mandrel 403 rotates, it will drive the two bearing blocks 402 to approach each other, thereby driving the two The two clamping plates 401 are close to each other, which is convenient to fix the stainless steel pipes to be welded according to the work requirements, improves the stability in the welding process, and has good use effect. At the same time, the two-way screw rod 403 is a roller screw rod, which does not specifically have a self-locking function. Therefore, when there is no external force to drive the two-way screw rod 403 to rotate, the return spring 404 will drive the bearing blocks 402 on both sides away from each other in the process of recovering elastic deformation. , so that it is convenient to disassemble the stainless steel pipe after welding, and the use effect is good.

In the embodiment provided by the present invention, the transmission unit 7 includes a tooth plate 701 that is slidably connected to the processing table 1, and the two-way screw rods 403 are provided with a straight gear 702, and the two spur gears 702 are meshed with the tooth plate 701; A limit block 703 is fixedly connected to the bottom of 701, a limit groove is provided on the processing table 1, and the limit block 703 is slidably connected in the limit groove, and a connecting spring is arranged between the limit block 703 and the limit groove.

Specifically, wherein the transmission unit 7 includes a toothed plate 701 that is slidably connected to the processing table 1, and the two-way screw rods 403 are provided with a spur gear 702, and the two spur gears 702 are meshed with the toothed plate 701, so when the toothed plate 701 slides , it will drive two spur gears 702 to rotate, and a limit block 703 is fixedly connected to the bottom of the tooth plate 701, and a limit groove is provided on the processing table 1, and the limit block 703 is slidably connected in the limit groove, and the limit block 703 There is a connecting spring between the limit groove and the two clamping plates 401 to be close to each other to fix the stainless steel pipe, and the tooth plate 701 is driven to slide. When the tooth plate 701 slides, the two spur gears 702 will be driven to rotate. Thereby can drive two-way screw mandrel 403 to rotate, when two-way screw mandrel 403 rotates, can drive two bearing blocks 402 close to each other, thereby can drive two clamping plates 401 close to each other, be convenient to the stainless steel pipe that needs to be welded according to work needs Fixed, improve the stability in the welding process, the use effect is good. At the same time, when the tooth plate 701 slides, it will drive the limiting block 703 to slide in the limiting groove, improving the stability of the tooth plate 701 when sliding, and when the limiting block 703 slides, it will drive the connecting spring to elastically deform .

In the embodiment provided by the present invention, wherein the drive unit 8 includes a threaded rod 804 that is rotatably connected to the processing table 1, a drive frame 803 is slidably connected to the processing table 1, and the threaded rod 804 is threadedly connected with the drive frame 803; A driving block 802 is fixedly connected, and a force receiving block 801 is fixedly connected to the tooth plate 701 , and the driving block 802 abuts against the force receiving block 801 . Specifically, the driving block 802 is a wedge-shaped block, and the force-receiving block 801 is provided with a wedge-shaped groove matching the wedge-shaped block, and the wedge-shaped block abuts against the wedge-shaped groove. Therefore, when in use, the threaded rod 804 is driven to rotate. When the threaded rod 804 rotates, the drive frame 803 can be driven to slide, and the drive frame 803 can drive the drive block 802 to slide, thereby passing between the drive block 802 and the stressed block 801. The cooperation can drive the tooth plate 701 to slide, and the use effect is good.

In the embodiment provided by the present invention, a driving handle 805 is fixedly connected to the threaded rod 804, so that the driving handle 805 can be used to drive the threaded rod 804 to rotate, and the use effect is good. Wherein, a locking member 9 is provided between the driving handle 805 and the processing table 1, and by setting the locking member 9, the stability of the stainless steel pipe during installation can be further improved, and the use effect is good.

In the embodiment provided by the present invention, the locking assembly includes a locking gear 906 fixedly connected to the threaded rod 804, and an arc-shaped plate 901 is slidably connected to the processing table 1, and multiple sets of locking grooves are provided on the arc-shaped plate 901. 902, the locking groove 902 is engaged with the locking gear 906. When the locking groove 902 is engaged with the locking gear 906, the threaded rod 804 can be fixed by the locking gear 906, and the use effect is good.

In the embodiment provided by the present invention, a chute is provided on the processing table 1, and a connecting plate 903 is slidably connected in the chute, and the connecting plate 903 is fixedly connected with the arc-shaped plate 901; a locking device is provided between the connecting plate 903 and the chute The spring 904 and the elastic force of the locking spring 904 drive the locking groove 902 to engage with the locking gear 906; a lifting rod 905 is fixedly connected to the arc-shaped plate 901, and the lifting rod 905 drives the arc-shaped plate 901 to slide. Therefore, when it is necessary to drive the threaded rod 804 to rotate, the arc plate 901 is first driven to slide through the lifting rod 905, and the arc plate 901 drives the connecting plate 903 to slide in the chute, and then squeezes the locking spring 904. When the arc plate 901 moves away from After the gear 906 is locked, the threaded rod 804 is unlocked, and the threaded rod 804 can be driven to rotate through the driving handle 805, and the use effect is good.

In the embodiment provided by the present invention, the welding assembly 3 includes a servo cylinder 301 , a bearing plate 302 is arranged at the bottom of the servo cylinder 301 , an electric welding machine is installed on the supporting plate 302 , and an welding rod 303 is clamped at the end of the electric welding machine. Therefore, when in use, the bearing plate 302 is driven to slide by the servo cylinder 301, and the bearing plate 302 drives the electric welding machine to slide, and then the welding rod 303 on the electric welding machine can abut against the steel pipe body 6, thereby completing the welding operation, and the use effect is good

In the embodiment provided by the present invention, the drive assembly 5 includes a drive screw 502 rotatably connected to the frame, and a threaded sleeve 503 is threaded on the drive screw 502, and the threaded sleeve 503 is fixedly connected with the servo cylinder 301 through a fixing plate; A servo motor 501 is installed on the frame, and the output shaft of the servo motor 501 is coaxially connected with the driving screw rod 502 . Therefore, when in use, start the servo motor 501, and when the rotation shaft of the servo motor 501 rotates, the threaded sleeve 503 can be driven to slide by driving the screw mandrel 502 to rotate, so that the fixed plate can be driven to slide by the threaded sleeve 503. When the fixed plate slides, then It will drive the servo cylinder 301 to slide, which is convenient to adjust the position of the welding assembly 3 according to the needs of the working environment, and the use effect is good

In the embodiment provided by the present invention, a control box 10 is installed on the processing table 1 .

Working principle: When the stainless steel pipe needs to be fixed by the clamping assembly 4, the arc plate 901 is first driven to slide by the lifting rod 905, and the arc plate 901 drives the connecting plate 903 to slide in the chute, and then squeezes the locking spring 904, When the arc-shaped plate 901 is away from the locking gear 906, the threaded rod 804 is unlocked, and the threaded rod 804 can be driven to rotate through the driving handle 805, and the use effect is good. When the threaded rod 804 rotates, it can drive the driving frame 803 to slide, and the sliding of the driving frame 803 can drive the driving block 802 to slide, so that the tooth plate 701 can be driven to slide through the cooperation between the driving block 802 and the stressed block 801. When it is necessary to drive the two clamping plates 401 close to each other to fix the stainless steel pipe, the tooth plate 701 is driven to slide, and when the tooth plate 701 slides, it will drive the two spur gears 702 to rotate, thereby driving the two-way screw rod 403 to rotate. When the rod 403 rotates, it will drive the two bearing blocks 402 to approach each other, thereby driving the two clamping plates 401 to approach each other, which is convenient for fixing the stainless steel pipes to be welded according to the work requirements, improving the stability during the welding process and improving the use effect. good. At the same time, when the tooth plate 701 slides, it will drive the limiting block 703 to slide in the limiting groove, improving the stability of the tooth plate 701 when sliding, and when the limiting block 703 slides, it will drive the connecting spring to elastically deform . Drive the welding assembly 3 to slide through the drive assembly 5 afterwards, adjust the position of the welding assembly 3, specifically, start the servo motor 501, and when the servo motor 501 rotating shaft rotates, the threaded sleeve 503 can be driven to slide by driving the screw mandrel 502 to rotate, thereby being able to The threaded sleeve 503 drives the fixed plate to slide, and when the fixed plate slides, it will drive the servo cylinder 301 to slide, which is convenient for adjusting the position of the welding assembly 3 according to the working environment, and the use effect is good.

When the stainless steel pipe needs to be disassembled, the threaded rod 804 is unlocked through the locking member 9 again, and the threaded rod 804 is reversed, so that the drive frame 803 slides in the opposite direction, thereby driving the drive block 802 away from the force block 801, and the connection spring returns to elasticity at this moment During the deformation process, the tooth plate 701 is driven to slide in the opposite direction, so as to drive the two-way screw rod 403 to rotate in the opposite direction. At the same time, the return spring 404 will drive the bearing blocks 402 on both sides to move away from each other during the process of recovering elastic deformation, thereby facilitating The stainless steel pipe after welding is disassembled, and the use effect is good.

It should be noted that the electrical equipment involved in this application can be powered by a battery or connected to an external power supply.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (10)

1. The utility model provides a spacing frock of stainless steel pipe welding, includes processing platform (1), fixedly connected with support frame (2) on processing platform (1), its characterized in that:

the welding device is characterized in that the support frame (2) is connected with a welding assembly (3) in a sliding manner, and the support frame (2) is provided with a driving assembly (5) for driving the welding assembly (3) to slide;

the processing table (1) is provided with a group of clamping assemblies (4) for clamping the steel pipe body (6);

the steel tube clamping device is characterized in that a driving unit (8) is arranged on the machining table (1), and the driving unit (8) drives the clamping assembly (4) to clamp and fix the steel tube body (6) through a transmission unit (7).

2. The stainless steel pipe welding limiting tool according to claim 1, wherein: the clamping assembly (4) comprises two clamping plates (401) which slide in opposite directions, each bottom is fixedly connected with a bearing block (402), the machining table (1) is rotationally connected with a bidirectional screw rod (403), and each bearing block (402) is respectively connected to two ends of the bidirectional screw rod (403) in a threaded mode; a plurality of groups of return springs (404) are arranged between the two bearing blocks (402).

3. The stainless steel pipe welding limiting tool according to claim 2, wherein: the transmission unit (7) comprises a toothed plate (701) which is connected to the processing table (1) in a sliding way, a straight gear (702) is arranged on each of the two bidirectional screw rods (403), and the two straight gears (702) are meshed with the toothed plate (701);

a limiting block (703) is fixedly connected to the bottom of the toothed plate (701), a limiting groove is formed in the machining table (1), the limiting block (703) is slidably connected in the limiting groove, and a connecting spring is arranged between the limiting block (703) and the limiting groove.

4. A stainless steel pipe welding limiting tool as claimed in claim 3, wherein: the driving unit (8) comprises a threaded rod (804) rotatably connected to the processing table (1), a driving frame (803) is slidably connected to the processing table (1), and the threaded rod (804) is in threaded connection with the driving frame (803);

a driving block (802) is fixedly connected to the driving frame (803), a stress block (801) is fixedly connected to the toothed plate (701), and the driving block (802) is abutted to the stress block (801).

5. The stainless steel tube welding limiting tool according to claim 4, wherein: a driving handle (805) is fixedly connected to the threaded rod (804), and a locking piece (9) is arranged between the driving handle (805) and the processing table (1).

6. The stainless steel tube welding limiting tool of claim 6, wherein: the locking assembly comprises a locking gear (906) fixedly connected to the threaded rod (804), an arc plate (901) is connected to the processing table (1) in a sliding mode, a plurality of groups of locking grooves (902) are formed in the arc plate (901), and the locking grooves (902) are matched with the locking gear (906) in a clamping mode.

7. The stainless steel tube welding limiting tool of claim 6, wherein: a chute is formed in the processing table (1), a connecting plate (903) is connected in a sliding manner in the chute, and the connecting plate (903) is fixedly connected with the arc-shaped plate (901);

a locking spring (904) is arranged between the connecting plate (903) and the sliding groove, and the elastic force of the locking spring (904) drives the locking groove (902) to be clamped with the locking gear (906);

a lifting rod (905) is fixedly connected to the arc-shaped plate (901), and the lifting rod (905) drives the arc-shaped plate (901) to slide.

8. The stainless steel pipe welding limiting tool according to claim 1, wherein: the welding assembly (3) comprises a servo cylinder (301), a bearing plate (302) is arranged at the bottom of the servo cylinder (301), an electric welding machine is installed on the bearing plate (302), and welding rods (303) are clamped at the ends of the electric welding machine.

9. The stainless steel tube welding limiting tool of claim 8, wherein: the driving assembly (5) comprises a driving screw rod (502) rotatably connected to the frame, a thread sleeve (503) is connected to the driving screw rod (502) in a threaded mode, and the thread sleeve (503) is fixedly connected with the servo cylinder (301) through a fixing plate;

a servo motor (501) is arranged on the frame, and an output shaft of the servo motor (501) is coaxially connected with a driving screw rod (502).

10. The stainless steel pipe welding limiting tool according to claim 1, wherein: a control box (10) is arranged on the processing table (1).