Welding fixture for multifunctional electric welding machine

Abstract

The invention discloses a welding clamp for a multifunctional electric welding machine, and relates to the technical field of welding clamps, the welding clamp comprises a supporting seat and a clamping size adjusting mechanism, first sliding rail sets are symmetrically arranged on the top wall of the supporting seat left and right, and sliding seats are connected to the first sliding rail sets of the supporting seat through first electric sliding blocks in a left-right sliding mode; an adapting mechanism is arranged on the sliding seat, a clamping size adjusting mechanism is arranged on the adapting mechanism, a driving mechanism is arranged on the clamping size adjusting mechanism, and an accurate butt joint mechanism is arranged in the middle of the top wall of the supporting seat. The welding fixture has the advantages that the sliding seat, the adaptive mechanism and the clamping size adjusting mechanism are matched, adaptive adjustment is performed according to the length and size of a to-be-welded pipe fitting, the limiting space is flexibly changed, and the practicability of the fixture is improved; and through cooperation of the adaptation mechanism and the accurate butt joint mechanism, the welding end of the pipe fitting can be further stably clamped conveniently, circumferential continuous welding is facilitated, and the continuity of the welding process is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding fixtures, in particular to a welding fixture used for a multifunctional electric welding machine. Background Art

[0002] A multifunctional electric welder is a device that can perform a variety of welding processes. It integrates different types of welding functions to meet the needs of various materials and application scenarios. It usually has functions such as DC arc welding and gas shielded welding. The welding fixture is a key tool to ensure that the workpiece position is fixed, aligned and stable during the welding process. Common general-purpose clamps include C-clamps, angle irons, V-blocks, etc.

[0003] At present, in the process of welding pipe fittings by a multifunctional electric welder, the two pipe fittings to be welded are usually first limited and clamped by a welding fixture, and manual operation is required to complete the clamping action to reduce welding defects caused by the movement of the pipe fittings; however, in the welding of pipe fittings, the limiting and clamping range of the universal fixture is limited, and it is not convenient to adjust according to the length and size of the pipe fittings, resulting in the clamping effect and the practicality of the fixture need to be improved; secondly, when processing round pipes, the contact surface area between the universal fixture and the round pipe workpiece is limited, resulting in the limiting range being not accurate enough; furthermore, when welding pipe fittings, small or medium-sized pipe fittings are usually turned over after one section of welding is completed to facilitate the welding of the next section, and the continuity of the welding process and the stability of the turning process need to be improved.

[0004] Therefore, in order to improve the practicability of the clamp and the continuity of welding, the present invention provides a welding clamp for a multifunctional electric welding machine. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art and to propose a welding fixture for a multifunctional electric welding machine.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A welding fixture for a multifunctional electric welding machine comprises a support seat and a clamping size adjustment mechanism, which is movably connected to a sliding seat, wherein the sliding seat is composed of a U-shaped seat connected to the support seat and a circular ring member fixed to the top wall of the U-shaped seat; an adaption mechanism is arranged on the sliding seat, and a clamping size adjustment mechanism is arranged on the adaption mechanism, a driving mechanism is arranged on the clamping size adjustment mechanism, and a docking accuracy mechanism is arranged in the middle of the top wall of the support seat.

[0008] The clamping size adjustment mechanism includes a size adjustment component that adjusts and limits the size of the pipe to be welded and a conversion component that converts the limit position of the size adjustment component for square tubes or round tubes. The driving mechanism includes a sliding column, a double-headed telescopic rod and a connecting component for connecting or releasing the adaptation mechanism. The docking accuracy mechanism includes a fixed slide seat and a docking component that aligns and stabilizes the welding position of the pipe.

[0009] In the above-mentioned welding fixture for a multifunctional electric welding machine, the adaptation mechanism includes an adjusting ring 1, and the outer walls of the two sliding seats on the side away from the circular ring members 1 are each provided with an annular slide rail 2, and the slide rail 2 of the sliding seat is slidably connected with the adjusting ring 1 through the electric slider 2, and one side wall of the two adjusting rings is each provided with an annular slide rail 3, and the slide rail 3 of the adjusting ring 1 is slidably connected with the adjusting ring 2.

[0010] In the above-mentioned welding fixture for a multifunctional electric welding machine, four size adjustment components are commonly arranged on the adjustment ring 1 and the adjustment ring 2 on the same side, and the size adjustment components on the adjustment ring 1 and the size adjustment components on the adjustment ring 2 are staggered, and the size adjustment components are provided with conversion components.

[0011] In the above-mentioned welding fixture for a multifunctional electric welding machine, the size adjustment component includes a rotating seat one, and the outer walls of the two adjustment rings one and the outer walls of the two adjustment rings two are symmetrically rotatably connected to the rotating seat one, and the one side walls of the four rotating seats are fixed with connecting rods, and the two connecting rods on the same adjustment ring one are parallel to each other, and the two connecting rods on the same adjustment ring two are parallel to each other.

[0012] In the above-mentioned welding fixture for a multifunctional electric welding machine, one end of the connecting rod away from the rotating seat one is slidably connected to the rotating seat two, and the side wall of the rotating seat two connected to the corresponding connecting rod on the adjusting ring two is rotatably connected to the adjusting ring one, and the side wall of the rotating seat two connected to the corresponding connecting rod on the adjusting ring one is rotatably connected to the adjusting ring two.

[0013] In the above-mentioned welding fixture for a multifunctional electric welding machine, the conversion assembly includes a conversion seat, and the middle outer wall of the connecting rod is sleeved with the conversion seat, the inner wall of the conversion seat is symmetrically fixedly connected with a protrusion through a spring, and the outer wall of the connecting rod is symmetrically provided with a groove one that is adapted to the protrusion, and the outer wall of the conversion seat is symmetrically fixedly connected with a circular tube clamp and a square tube clamp corresponding to the protrusion.

[0014] In the above-mentioned welding fixture for a multifunctional electric welding machine, the side walls of the two adjusting rings 2 are provided with annular slide rails 3, and the slide rails 3 of the adjusting rings 2 are slidably connected with slide columns, and a double-headed telescopic rod is fixedly connected between the two slide columns.

[0015] In the above-mentioned welding fixture for a multifunctional electric welding machine, the connecting assembly includes a connecting block, the upper parts of the side walls of the two adjusting rings that are close to each other are hinged with connecting blocks, and a positioning bolt is snap-connected to the connecting block, the sliding column is provided with a positioning hole 1 that is compatible with the positioning bolt, and the adjusting ring 1 is provided with a plurality of positioning holes 2 that are compatible with the positioning bolt along the circumferential direction.

[0016] In the above-mentioned welding fixture for a multifunctional electric welding machine, a fixed slide is fixed to the middle part of the top wall of the support seat, and the fixed slide is composed of two front-to-back symmetrical vertical plates connected to the support seat and a circular ring member 2 fixed between the two vertical plates, and the inner wall of the circular ring member 2 of the fixed slide is symmetrically provided with annular slide rails 4, and a processing position is provided on the upper half of the fixed slide.

[0017] In the above-mentioned welding fixture for a multifunctional electric welding machine, the docking assembly includes an electric telescopic rod, and the two slide rails four are connected to the electric telescopic rod by sliding blocks in a front-rear symmetrical sliding manner, and a stabilizing rod is commonly fixed between the telescopic ends of the two electric telescopic rods corresponding to the left and right sides, and the front side walls of the telescopic ends of the two electric telescopic rods corresponding to the left and right sides on the rear side are fixed with a V-shaped docking piece 1, and the rear side walls of the telescopic ends of the two electric telescopic rods corresponding to the left and right sides on the front side are fixed with a V-shaped docking piece 2, and the docking piece 1 is provided with a slot 2 for the docking piece 2 to pass through.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. By cooperating with the sliding seat, the adapting mechanism and the clamping size adjustment mechanism, adaptive adjustment is performed according to the length and size of the pipe to be welded, the limiting space is flexibly changed, and the practicality of the clamp is improved; the sliding seat is adjusted according to the length of the pipe to be welded, so that the adapting mechanism and the clamping size adjustment mechanism can provide more stable support and limit for the pipe to be welded; by adjusting the double-head telescopic rod, the left and right sets of clamping size adjustment mechanisms are adjusted synchronously, so as to adjust and limit the pipe to be welded according to the size of the pipe to be welded.

[0020] 2. By coordinating the size adjustment component and the conversion component, the limit conversion is performed for square tube and round tube batches according to different processing batches, the contact surface area is increased, and the limit range is more accurate; when the round tube clamp is close to the center of the second adjustment ring, the round tube clamp increases the contact area with the surface of the round tube fitting to be processed, which is convenient for processing the round tube batch; when the square tube clamp is close to the center of the second adjustment ring, the square tube clamp increases the contact area with the surface of the square tube fitting to be processed, which is convenient for processing the square tube.

[0021] 3. Through the coordination of the adaptive mechanism and the accurate docking mechanism, it is convenient to further stably clamp the welding end of the pipe fitting, and to facilitate circumferential continuous welding, thereby improving the continuity of the welding process; the left and right groups of front-to-back opposite docking pieces 1 and 2 respectively further limit the welding ends of the two pipe fittings to be processed, and the stabilizing rod increases the stability of the limit clamping of the welding ends of the two pipe fittings to be processed by the docking pieces 1 and 2; the adjusting ring 1, the adjusting ring 2 and the two pipe fittings rotate at the same time, and the docking assembly and the fixed slide seat slide adaptively. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 A schematic diagram of the overall structure.

[0024] Figure 2 It is a partial structural diagram of the adaptation mechanism and the clamping size adjustment mechanism.

[0025] Figure 3 It is a structural schematic diagram of the clamping size adjustment mechanism.

[0026] Figure 4 This is a schematic diagram of the change in the limit space between multiple connecting rods from small to large due to the forward rotation of the adjustment ring 2.

[0027] Figure 5 It is a schematic diagram of the structure when the circular tube clamp is limited.

[0028] Figure 6 It is a schematic diagram of the structure when the square tube clamp is limited.

[0029] Figure 7 A schematic diagram of the cross-sectional structure of the conversion component.

[0030] Figure 8 This is a schematic diagram of the change from the state of the connecting block connecting the adjusting ring 2 and the sliding column to the state of the connecting block connecting the adjusting ring 2 and the adjusting ring 1.

[0031] Fig. 9 It is a structural diagram of the accurate docking mechanism.

[0032] Fig.10 It is a structural schematic diagram of the docking component.

[0033] In the figure: 1. Support seat; 2. Sliding slide seat; 3. Adaptation mechanism; 31. Adjustment ring 1; 32. Adjustment ring 2; 4. Clamping size adjustment mechanism; 41. Size adjustment assembly; 411. Rotating seat 1; 412. Connecting rod; 413. Rotating seat 2; 42. Conversion assembly; 421. Conversion seat; 422. Bump; 423. Round pipe clamp; 424. Square pipe clamp; 5. Driving mechanism; 51. Sliding column; 52. Double-headed telescopic rod; 53. Connecting assembly; 531. Connecting block; 532. Positioning bolt; 533. Positioning hole 1; 534. Positioning hole 2; 6. Accurate docking mechanism; 61. Fixed slide seat; 62. Docking assembly; 621. Electric telescopic rod; 622. Stabilizing rod; 623. Docking piece 1; 624. Docking piece 2. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Reference Figure 1 A welding fixture for a multifunctional electric welding machine includes a support seat 1 and a clamping size adjustment mechanism 4. A slide rail group 1 is symmetrically provided on the top wall of the support seat 1. A sliding slide 2 is connected to the slide rail group 1 of the support seat 1 through an electric slider 1 for sliding left and right sliding. The sliding slide 2 consists of a U-shaped seat connected to the support seat 1 and a circular ring member fixed to the top wall of the U-shaped seat; an adaptation mechanism 3 is provided on the sliding slide 2, a clamping size adjustment mechanism 4 is provided on the adaptation mechanism 3, a driving mechanism 5 is provided on the clamping size adjustment mechanism 4, and a docking accuracy mechanism 6 is provided in the middle of the top wall of the support seat 1.

[0036] Before processing different batches, the sliding slide 2 is adjusted in position according to the length of the pipe to be welded, and the adjustment drive mechanism 5 drives the adaptation mechanism 3 and the clamping size adjustment mechanism 4 to adjust and limit the size of the pipe to be welded; before the welding process, the docking accuracy mechanism 6 is used to further align and stabilize the docking points of the two pipes, so as to improve the accuracy of the subsequent welding process.

[0037] Reference Figures 2 to 3 The adaptation mechanism 3 includes an adjusting ring 1 31, and the outer walls of the two sliding seats 2 on the side away from the circular ring members 1 are each provided with an annular slide rail 2, and the slide rail 2 of the sliding seat 2 is slidably connected with the adjusting ring 1 31 through the electric slider 2, and the side walls of the two adjusting rings 1 31 are each provided with an annular slide rail 3, and the slide rail 3 of the adjusting ring 1 31 is slidably connected with an adjusting ring 2 32.

[0038] Reference Figures 2 to 3 The clamping size adjustment mechanism 4 includes a size adjustment component 41 for adjusting and limiting the size of the pipe to be welded and a conversion component 42 for converting the limit position of the size adjustment component 41 for the square tube or the round tube. Four size adjustment components 41 are commonly arranged on the adjustment ring 1 31 and the adjustment ring 2 32 on the same side. The size adjustment components 41 on the adjustment ring 1 31 and the size adjustment components 41 on the adjustment ring 2 32 are staggered, and the size adjustment components 41 are arranged with conversion components 42.

[0039] Reference Figures 2 to 4 The size adjustment component 41 includes a rotating seat 411, and the outer walls on the side away from the two adjustment rings 1 31 and the outer walls on the side away from the two adjustment rings 2 32 are symmetrically connected to the rotating seat 411 for rotation. The side walls of the four rotating seats 411 are fixed with connecting rods 412. The two connecting rods 412 on the same adjustment ring 1 31 are parallel to each other, and the two connecting rods 412 on the same adjustment ring 2 32 are parallel to each other; one end of the connecting rod 412 away from the rotating seat 1 411 is slidably connected to the rotating seat 2 413, and the side wall of the rotating seat 2 413 on the adjusting ring 2 32 connected by the corresponding connecting rod 412 is rotatably connected to the adjusting ring 1 31, and the side wall of the rotating seat 2 413 on the adjusting ring 1 31 connected by the corresponding connecting rod 412 is rotatably connected to the adjusting ring 2 32.

[0040] Reference Figure 3 , Figures 5 to 7 The conversion assembly 42 includes a conversion seat 421, the middle outer wall of the connecting rod 412 is sleeved with the conversion seat 421, the inner wall of the conversion seat 421 is symmetrically fixedly connected with a protrusion 422 through a spring, the outer wall of the connecting rod 412 is symmetrically provided with a groove 1 adapted to the protrusion 422, and the outer wall of the conversion seat 421 is symmetrically fixedly connected with a circular tube clamp 423 and a square tube clamp 424 corresponding to the protrusion 422.

[0041] Reference Figure 2 and Figure 8 The driving mechanism 5 includes a slide column 51, a double-headed telescopic rod 52 and a connecting component 53 for connecting or releasing the adaptation mechanism 3. The side walls of the two adjustment rings 32 are provided with an annular slide rail 3, and the slide column 51 is slidably connected to the slide rail 3 of the adjustment ring 32. The double-headed telescopic rod 52 is fixedly connected between the two slide columns 51.

[0042] Reference Figure 2 and Figure 8 The connecting assembly 53 includes a connecting block 531, and the upper parts of the side walls adjacent to the two adjusting rings 32 are hinged with connecting blocks 531, and a positioning bolt 532 is snap-connected to the connecting block 531. The sliding column 51 is provided with a positioning hole 533 matched with the positioning bolt 532, and the adjusting ring 31 is provided with a plurality of positioning holes 534 matched with the positioning bolt 532 along the circumferential direction.

[0043] Before processing different batches, the electric slider drives the sliding slide 2 to slide left and right on the slide rail group 1 of the support seat 1 to a suitable position. The sliding slide 2 is adjusted in position according to the length of the pipe to be welded, so that the adaptation mechanism 3 and the clamping size adjustment mechanism 4 can provide more stable support and limitation for the pipe to be welded.

[0044] Before processing a batch of square tubes or a batch of round tubes, the conversion seat 421 is manually turned to rotate around the connecting rod 412, driving the round tube clamp 423 and the square tube clamp 424 to rotate. During the rotation, the spring connected between the protrusion 422 and the conversion seat 421 is compressed. When the protrusion 422 enters the corresponding slot one, the spring rebounds, and the protrusion 422 limits the position of the conversion seat 421. When the round tube clamp 423 is close to the center of the adjusting ring 2 32, the round tube clamp 423 increases the contact area with the surface of the round tube fitting to be processed, which is convenient for processing batches of round tubes. When the square tube clamp 424 is close to the center of the adjusting ring 2 32, the square tube clamp 424 increases the contact area with the surface of the square tube fitting to be processed, which is convenient for processing square tubes.

[0045] Pass the pipe to be processed through the adjusting ring 2 32, the adjusting ring 2 32 and the sliding slide 2 from the left and right directions, and move toward the middle until the ends of the two pipes are in contact with each other, and the positioning bolt 532 is inserted into the connecting block 531 and the positioning hole 1 533. At this time, the sliding column 51 and the adjusting ring 2 32 are relatively fixed, and the two ends of the double-headed telescopic rod 52 are telescoped and adapted when the sliding slide 2 changes its position. Hold the middle part of the double-headed telescopic rod 52 and push the sliding column 51 and the adjusting ring 2 32 to rotate on the slide rail 3 of the adjusting ring 1 31.

[0046] The rotation of the adjusting ring 2 32 drives the rotating seat 1 411 on the adjusting ring 2 32 to move, and the rotating seat 1 411 drives the connecting rod 412 to move away from or close to the pipe to be processed, and the rotating seat 1 411 adaptively rotates on the adjusting ring 2 32, and one end of the connecting rod 412 connected to the rotating seat 2 413 slides on the rotating seat 2 413, and the rotating seat 2 413 rotates on the adjusting ring 1 31 with the change of the connecting rod 412; when the double-headed telescopic rod 52 pulls the section ring 2 32 to rotate forward, the connecting rods 412 on the adjusting ring 1 31 and the adjusting ring 2 32 move away from each other, and the space between the staggered connecting rods 412 becomes larger, so as to limit and support the large-sized pipe to be welded; when the double-headed telescopic rod 52 pulls the section ring 2 32 to rotate backward, the connecting rods 412 on the adjusting ring 1 31 and the adjusting ring 2 32 move closer to each other, and the space between the staggered connecting rods 412 becomes smaller, so as to limit and support the small-sized pipe to be welded.

[0047] By adjusting the double-head telescopic rod 52, the left and right groups of clamping size adjustment mechanisms 4 are adjusted synchronously, and the limiting space is flexibly changed to facilitate adjustment and limiting according to the size of the pipe to be welded, thereby improving the practicality of the clamp.

[0048] When the position adjustment of the adjusting ring 2 32 is completed, the positioning bolt 532 is pulled out, and the positioning bolt 532 is rotated from a vertical state to a horizontal state, and the positioning bolt 532 is inserted into the connecting block 531 and the positioning hole 2 534. At this time, the positions of the adjusting ring 1 31 and the adjusting ring 2 32 are relatively fixed, and the sliding column 51 and the adjusting ring 2 32 are changed from a relatively fixed state to a sliding connection state to avoid obstruction of the rotation caused by the double-headed telescopic rod 52 during the subsequent rotation for circumferential welding.

[0049] Reference Figure 1 , Fig. 9 The accurate docking mechanism 6 includes a fixed slide 61 and a docking component 62 for aligning and stabilizing the welding position of the pipe fitting; a fixed slide 61 is fixed to the middle of the top wall of the support seat 1, and the fixed slide 61 is composed of two front-to-back symmetrical vertical plates connected to the support seat 1 and a circular ring member 2 fixed between the two vertical plates. The inner wall of the circular ring member 2 of the fixed slide 61 is symmetrically provided with annular slide rails 4, and a processing position is provided on the upper half of the fixed slide 61.

[0050] Reference Figures 9 and 10 The docking assembly 62 includes an electric telescopic rod 621, and the two slide rails four are connected to the electric telescopic rod 621 by sliding blocks to slide symmetrically in the front and rear directions. A stabilizing rod 622 is fixed between the telescopic ends of the two corresponding electric telescopic rods 621 on the left and right sides. The front side walls of the telescopic ends of the two corresponding electric telescopic rods 621 on the rear left and right sides are fixed with V-shaped docking pieces 1 623, and the rear side walls of the telescopic ends of the two corresponding electric telescopic rods 621 on the front left and right sides are fixed with V-shaped docking pieces 2 624. The docking piece 1 623 is provided with a slot 2 for the docking piece 2 624 to pass through.

[0051] Before welding, the welding ends of the two pipes to be processed are located in the fixed slide 61, and the telescopic end of the electric telescopic rod 621 drives the docking piece 1 623 and the square tube clamp 424 to approach each other, and the left and right groups of docking pieces 1 623 and docking pieces 2 624 facing each other front and back further limit and clamp the welding ends of the two pipes to be processed, and the stabilizing rod 622 increases the stability of the limit clamping of the welding ends of the two pipes to be processed by the docking pieces 1 623 and the docking pieces 2 624.

[0052] During the welding process, the welding gun of the multifunctional electric welder is manually operated to weld through the processing position on the top of the fixed slide 61, and the electric slide block 2 drives the adjusting ring 1 31, the adjusting ring 2 32 and the two pipe fittings to rotate simultaneously, and the welding end of the pipe fitting clamped by the docking assembly 62 rotates on the fixed slide 61 accordingly, and the fixed end of the electric telescopic rod 621 adaptively changes its position on the slide rail 4 on the fixed slide 61 through the slider, so as to facilitate circumferential welding of the welding ends of the two pipe fittings, thereby improving the continuity of the welding process.

[0053] The specific operation steps of the welding fixture for the multifunctional electric welding machine are as follows:

[0054] Before processing, the sliding seat 2 slides to a suitable position according to the length of the pipe to be welded. According to the processing batch of square pipes or round pipes, the conversion seat 421 is manually rotated around the connecting rod 412 to drive the round pipe clamp 423 and the square pipe clamp 424 to rotate to a suitable position.

[0055] Limit the position of the pipe to be welded according to its size, pass the pipe to be processed through the adjusting ring 2 32, the adjusting ring 2 32 and the sliding slide 2 from the left and right directions, move to the middle until the ends of the two pipes are in contact, hold the double-headed telescopic rod 52 to drive the adjusting ring 2 32 to rotate, and synchronously adjust the left and right groups of clamping size adjustment mechanisms 4 to flexibly change the limiting space; the docking piece 1 623 and the docking piece 2 624 further limit and clamp the welding ends of the two pipes to be processed respectively.

[0056] During welding, the welding gun of the multifunctional electric welder is manually operated to weld through the processing position on the top of the fixed slide 61, and the adjusting ring 1 31, the adjusting ring 2 32 and the two pipes rotate simultaneously to perform continuous circumferential welding.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welding fixture for a multifunctional electric welding machine, comprising a support seat (1) and a clamping size adjustment mechanism (4), characterized in that: The top wall of the support seat (1) is symmetrically provided with a slide rail group 1, and the slide rail group 1 of the support seat (1) is connected to a slide seat (2) for sliding left and right sliding through an electric slider, and the slide seat (2) is composed of a U-shaped seat connected to the support seat (1) and a circular ring member 1 fixed to the top wall of the U-shaped seat; The sliding seat (2) is provided with an adapting mechanism (3), and the adapting mechanism (3) is provided with a clamping size adjusting mechanism (4), and the clamping size adjusting mechanism (4) is provided with a driving mechanism (5), and a docking accuracy mechanism (6) is provided in the middle of the top wall of the supporting seat (1); The clamping size adjustment mechanism (4) comprises a size adjustment component (41) for adjusting and limiting the size of the pipe to be welded and a conversion component (42) for converting the limit position of the size adjustment component (41) for a square tube or a round tube. The driving mechanism (5) comprises a slide column (51), a double-head telescopic rod (52) and a connection component (53) for connecting or releasing the adaptation mechanism (3). The docking accuracy mechanism (6) comprises a fixed slide seat (61) and a docking component (62) for aligning and stabilizing the welding position of the pipe.

2. A welding fixture for a multifunctional electric welding machine according to claim 1, characterized in that: The adaptability mechanism (3) comprises an adjustment ring 1 (31), an outer wall of a side of the circular ring member 1 of the two sliding seats (2) which is away from each other is provided with an annular slide rail 2, and the slide rail 2 of the sliding seat (2) is slidably connected to the adjustment ring 1 (31) via an electric slider 2, and the side walls of the two adjustment rings 1 (31) are provided with an annular slide rail 3, and the slide rail 3 of the adjustment ring 1 (31) is slidably connected to the adjustment ring 2 (32).

3. A welding fixture for a multifunctional electric welding machine according to claim 2, characterized in that: Four size adjustment components (41) are commonly arranged on the adjustment ring one (31) and the adjustment ring two (32) on the same side, and the size adjustment components (41) on the adjustment ring one (31) and the size adjustment components (41) on the adjustment ring two (32) are staggeredly distributed, and the size adjustment components (41) are arranged with conversion components (42).

4. A welding fixture for a multifunctional electric welding machine according to claim 2, characterized in that: The size adjustment component (41) comprises a rotating seat one (411), and the outer walls of the two adjustment rings one (31) and the outer walls of the two adjustment rings two (32) are symmetrically connected to the rotating seat one (411) for rotation, and the four side walls of the rotating seat one (411) are fixed with connecting rods (412), and the two connecting rods (412) on the same adjustment ring one (31) are parallel to each other, and the two connecting rods (412) on the same adjustment ring two (32) are parallel to each other.

5. A welding fixture for a multifunctional electric welding machine according to claim 4, characterized in that: The end of the connecting rod (412) away from the rotating seat one (411) is slidably connected to the rotating seat two (413), and the side wall of the rotating seat two (413) on the adjusting ring two (32) connected by the corresponding connecting rod (412) is rotatably connected to the adjusting ring one (31), and the side wall of the rotating seat two (413) on the adjusting ring one (31) connected by the corresponding connecting rod (412) is rotatably connected to the adjusting ring two (32).

6. A welding fixture for a multifunctional electric welding machine according to claim 4, characterized in that: The conversion assembly (42) comprises a conversion seat (421), and the conversion seat (421) is sleeved on the middle outer wall of the connecting rod (412), the inner wall of the conversion seat (421) is symmetrically fixedly connected with a protrusion (422) through a spring, and the outer wall of the connecting rod (412) is symmetrically provided with a groove one adapted to the protrusion (422), and the outer wall of the conversion seat (421) is symmetrically fixedly connected with a circular tube clamp (423) and a square tube clamp (424) corresponding to the protrusion (422).

7. A welding fixture for a multifunctional electric welding machine according to claim 2, characterized in that: The side walls of the two adjusting rings (32) are both provided with an annular slide rail (3), and the slide rail (3) of the adjusting ring (32) is slidably connected with a slide column (51), and a double-head telescopic rod (52) is fixedly connected between the two slide columns (51).

8. A welding fixture for a multifunctional electric welding machine according to claim 2, characterized in that: The connecting assembly (53) comprises a connecting block (531), the upper parts of the side walls of the two adjusting rings (32) adjacent to each other are both hingedly connected with the connecting block (531), and a positioning bolt (532) is snap-connected on the connecting block (531), the sliding column (51) is provided with a positioning hole (533) matched with the positioning bolt (532), and the adjusting ring (31) is provided with a plurality of positioning holes (534) matched with the positioning bolt (532) along a circumferential direction.

9. A welding fixture for a multifunctional electric welding machine according to claim 1, characterized in that: A fixed slide (61) is fixed to the middle of the top wall of the support seat (1), and the fixed slide (61) is composed of two vertical plates connected to the support seat (1) and symmetrically arranged in front and back, and a circular ring member 2 fixed between the two vertical plates, and the inner wall of the circular ring member 2 of the fixed slide (61) is provided with a circular slide rail 4 symmetrically arranged in the left and right, and a processing position is provided on the upper half of the fixed slide (61).

10. A welding fixture for a multifunctional electric welding machine according to claim 1, characterized in that: The docking assembly (62) comprises an electric telescopic rod (621), the two slide rails (4) are connected to the electric telescopic rod (621) by sliding blocks so as to slide symmetrically in the front and rear directions, and a stabilizing rod (622) is fixed between the telescopic ends of the two corresponding electric telescopic rods (621) on the left and right sides, a V-shaped docking piece (623) is fixed to the front side walls of the telescopic ends of the two corresponding electric telescopic rods (621) on the rear side, and a V-shaped docking piece (624) is fixed to the rear side walls of the telescopic ends of the two corresponding electric telescopic rods (621) on the front side, and a slot (2) for the docking piece (624) to pass through is provided on the docking piece (623).

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