Welding tool for bicycle frame production

Abstract

The invention relates to the technical field of bicycle frame welding, in particular to a welding tool for bicycle frame production, which is characterized in that a triangular base plate is provided with a mounting mechanism and a positioning mechanism, and the mounting mechanism and the positioning mechanism are jointly provided with a locking mechanism; spot welding machining can be replaced, all parts of the front triangular frame can be directly, stably and preliminarily positioned and formed, and welding equipment can directly conduct fish scale pattern welding on the attaching positions of all the parts; through the adjusting assembly in the positioning mechanism, the angle of the clamping assembly can be quickly and stably adjusted, and meanwhile, different triangular base plates are matched, so that the positioning requirements of all matched parts of the front triangular frame can be met; through cooperation of the locking mechanism, the mounting mechanism and the positioning mechanism, all parts of the front triangular frame can be synchronously and rapidly locked and stably fastened, and meanwhile after all the parts are welded and formed, the parts can be rapidly and synchronously unlocked.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle frame welding, in particular to a welding tool for producing a bicycle frame. Background Art

[0002] The bicycle frame is the core structure of the whole vehicle, and is generally composed of a front triangle frame and a rear triangle frame, wherein the front triangle frame is usually formed by positioning and welding a head tube, a bottom bracket, an upper tube, a down tube and a seat tube in a specific triangular shape; in the prior art, when welding the front triangle frame, usually the components constituting the front triangle frame are manually placed at corresponding positions in a specific frame on the upper side of an operating table, and then the bottom bracket, the seat tube and the head tube are respectively locked and limited by a locking device, and then the fitting positions between the components are preliminarily spot welded and fixed, and then the lock is released and the preliminarily formed front triangle frame is taken out, and finally the fitting positions between the components are subjected to fish scale welding with higher strength and quality.

[0003] However, the conventional method of welding the front triangle frame has the following problems: 1. In the prior art, the components of the front triangle frame not only need to be locked in multiple steps before spot welding, but also need to be unlocked after the frame is initially formed before the initially formed frame can be taken out and welded. The above locking method not only has complicated overall operation steps, but also has low locking efficiency of each component. At the same time, when welding more front triangle frames, it will lead to heavy overall manual operation burden and high labor cost; 2. In the prior art, on the operating table, When the locked front triangle frame components are welded, due to the obstruction of the operating table, it is impossible to directly perform comprehensive fish scale welding on the fitting positions between the components, and during the initial spot welding, only the side of each fitting position away from the operating table can be spot welded, which not only leads to an increase in the overall operation steps and workload for the complete welding of the front triangle frame and a decrease in the overall processing speed and efficiency, but also leads to poor uniformity and stability of the spot welding processing of the fitting positions of the components, thereby affecting the accuracy of the welding of the front triangle frame and the final quality of the finished bicycle. Summary of the invention

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a welding tool for producing a bicycle frame, which is used for welding a front triangle frame, wherein the front triangle frame includes a head tube, a bottom bracket, an upper tube, a down tube and a seat tube, and the welding tool includes a triangular base plate, on which a mounting mechanism and a positioning mechanism are arranged, and the mounting mechanism and the positioning mechanism are jointly provided with a locking mechanism, and the positioning mechanism and the locking mechanism are jointly provided with the front triangle frame.

[0005] The mounting mechanism comprises mounting holes which are opened at three corners of the triangular base plate and pass through the left and right sides, and a positioning component is arranged on the triangular base plate.

[0006] The positioning mechanism comprises an adjusting assembly installed at three corners of the triangular base plate, and a clamping assembly is arranged on the adjusting assembly.

[0007] The locking mechanism comprises a triangular limiting plate arranged on the alignment component, a limiting component and a docking component are arranged on the triangular limiting plate, a locking component is arranged on the triangular limiting plate and the docking component, and a fastening component is arranged on the docking component.

[0008] Preferably, the alignment component includes an L-shaped connecting frame fixedly arranged on the right side of the triangular base plate, a fixing plate fixedly arranged on the lower end of the L-shaped connecting frame, an alignment column fixedly arranged on the left side of the fixing plate, a docking column fixedly arranged on the front and rear of the left side of the triangular base plate, and a docking groove formed on the left end of the docking column.

[0009] Preferably, the adjustment assembly includes a positioning ring arranged on the left side of the triangular base plate, a plurality of positioning holes that pass through the positioning ring are evenly opened circumferentially, a rotating plate is rotatably arranged inside the positioning ring, mounting frames are symmetrically fixed on the left and right sides of the rotating plate, and threaded pins that are aligned with the corresponding positioning holes are commonly installed on the left and right symmetrical mounting frames, wherein the mounting frame on the right side is fixedly connected to the corresponding mounting hole by bolts and nuts.

[0010] Preferably, the clamping assembly includes a fixed clamping platform fixedly connected to the outer surface of the positioning ring through a connecting piece, a fixed clamping platform is also fixedly provided on the end of the left-right symmetrical mounting frame away from the corresponding rotating plate, spring rods are symmetrically fixedly provided on the side of the fixed clamping platform away from the corresponding positioning ring, a connecting plate 1 is fixedly provided on the symmetrical spring rods at one end away from the corresponding fixed clamping platform, a sliding clamping platform is elastically slidably provided on the symmetrical spring rods, and a positioning rod is fixedly provided on the left side of the fixed clamping platform and the sliding clamping platform.

[0011] Preferably, the limiting assembly includes a plurality of locking frames fixedly arranged on the frame of the triangular limiting plate and corresponding one-to-one with the fixed clamping platform, a straight groove one running through the left and right is opened on the locking frame, an L-shaped connecting frame two is fixedly arranged on the left side of the triangular limiting plate, a fixing plate two is fixedly arranged at the lower end of the L-shaped connecting frame two and is distributed opposite to the fixing plate one on the left and right, and an alignment column two is fixedly arranged on the right side of the fixing plate two.

[0012] Preferably, the docking assembly includes two straight grooves extending left and right on the triangular limit plate, a guide rod is symmetrically fixed on the left side of the triangular limit plate through a support, a sliding plate is symmetrically slidably arranged on the guide rods, and the sliding plate is provided with card-connecting grooves extending left and right and corresponding to the docking columns one by one on the front and back. The card-connecting grooves are composed of card-in grooves and plug-in grooves distributed front and back, wherein the card-in grooves are card-engaged with the corresponding docking grooves, and the plug-in grooves are slidably engaged with the corresponding docking columns.

[0013] Preferably, the locking assembly includes a positioning plate fixedly arranged on the rear side of the sliding plate and having an inclined rear end, the positioning plate is provided with a socket extending through the left and right sides, an elastic sleeve is fixedly arranged on the right side of the triangular limit plate, and a plug-in is elastically slidably arranged in the elastic sleeve, which slides left and right, penetrates the triangular limit plate and engages with the socket.

[0014] Preferably, the fastening assembly includes a connecting rod fixedly arranged on the front side of the sliding plate through a second connecting plate, a U-shaped seat with an opening facing backwards is fixedly arranged on the right end of the connecting rod, and baffles are symmetrically fixedly arranged on the upper and lower sides of the U-shaped seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention can replace the spot welding process, directly stabilize and preliminarily position and shape the components of the front triangle frame, and enable the welding equipment to directly perform fish scale welding on the fitting positions between the components, thereby greatly simplifying the overall operation steps of completely welding and forming the front triangle frame, improving the overall processing speed and efficiency of the bicycle frame, and improving the uniformity and stability of welding and fixing of each component, thereby improving the accuracy of welding and forming of the front triangle frame and the final quality of the finished bicycle product.

[0017] 2. The present invention can realize fast and stable angle adjustment of the clamping assembly through the adjustment assembly in the positioning mechanism. At the same time, by cooperating with different triangular base plates, it can adapt to the positioning requirements of the matching front triangle frame components, thereby ensuring the application scope of the present invention and the flexibility of processing operations, while also reducing the overall processing cost of the bicycle frame.

[0018] 3. The present invention cooperates with the locking mechanism, the installation mechanism and the positioning mechanism to realize synchronous and rapid locking and stable fastening of the components of the front triangle frame positioned on the locking mechanism and the positioning mechanism. At the same time, after the components are welded and formed, they can also be quickly and synchronously unlocked, thereby simplifying the operating steps of locking the components of the front triangle frame, improving the overall locking efficiency of the components, and reducing the overall manual operation burden and labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the welding structure of the front triangle frame.

[0021] Figure 3 It is a partial cross-sectional schematic diagram of the installation mechanism structure.

[0022] Figure 4 It is a partial cross-sectional schematic diagram of the positioning mechanism structure.

[0023] Figure 5 It is a partial cross-sectional schematic diagram of the locking mechanism structure.

[0024] Figure 6 It is a partial cross-sectional schematic diagram of some structures of the present invention.

[0025] In the figure: 1, front triangle frame; 11, head tube; 12, bottom bracket; 13, upper tube; 14, lower tube; 15, seat tube; 2, triangle base plate; 3, mounting mechanism; 31, alignment component; 311, L-shaped connecting frame 1; 312, fixing plate 1; 313, alignment column 1; 314, docking column; 315, docking groove; 4, positioning mechanism; 41, adjustment component; 411, positioning ring; 412, rotating plate; 413, mounting frame; 414, threaded pin; 42, clamping component; 421, fixed clamping platform; 422, Sliding clamp; 423, spring rod; 424, positioning rod; 5, locking mechanism; 51, triangular limit plate; 52, limit assembly; 521, locking frame; 522, L-shaped connecting frame II; 523, fixing plate II; 524, alignment column II; 53, docking assembly; 531, guide rod; 532, sliding plate; 533, snap-in groove; 54, locking assembly; 541, positioning plate; 542, elastic sleeve; 543, plug-in; 55, fastening assembly; 551, connecting rod; 552, U-shaped seat; 553, baffle. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1 and Figure 2A welding tool for producing a bicycle frame is used for welding a front triangle frame 1, wherein the front triangle frame 1 includes a head tube 11, a bottom bracket 12, an upper tube 13, a lower tube 14 and a seat tube 15. The welding tool includes a triangular base plate 2, on which a mounting mechanism 3 and a positioning mechanism 4 are arranged, and a locking mechanism 5 is arranged on the mounting mechanism 3 and the positioning mechanism 4, and the front triangle frame 1 is arranged on the positioning mechanism 4 and the locking mechanism 5.

[0028] See also Figure 1 and Figure 3 The mounting mechanism 3 includes mounting holes which are opened at three corners of the triangular substrate 2 and pass through the left and right sides. A positioning component 31 is provided on the triangular substrate 2.

[0029] See also Figure 3 and Figure 4 The alignment component 31 includes an L-shaped connecting frame 311 fixedly arranged on the right side of the triangular base plate 2, a fixing plate 312 is fixedly arranged at the lower end of the L-shaped connecting frame 311, an alignment column 313 is fixedly arranged on the left side of the fixing plate 312, and a docking column 314 is fixedly arranged on the front and rear of the left side of the triangular base plate 2, and a docking groove 315 is opened at the left end of the docking column 314.

[0030] See also Figure 3 The positioning mechanism 4 includes an adjusting assembly 41 installed at three corners of the triangular base plate 2 , and a clamping assembly 42 is provided on the adjusting assembly 41 .

[0031] See also Figure 3 and Figure 4 The adjustment component 41 includes a positioning ring 411 arranged on the left side of the triangular base plate 2. A plurality of positioning holes that penetrate left and right are evenly opened on the positioning ring 411 in the circumferential direction. A rotating plate 412 is rotatably arranged in the positioning ring 411. Mounting frames 413 are symmetrically fixed on the left and right sides of the rotating plate 412. Threaded pins 414 that are aligned with the corresponding positioning holes are commonly installed on the left and right symmetrical mounting frames 413, wherein the mounting frame 413 on the right is fixedly connected to the corresponding mounting hole by bolts and nuts.

[0032] See also Figure 3 and Figure 4The clamping assembly 42 includes a fixed clamping platform 421 fixedly connected to the outer surface of the positioning ring 411 through a connecting piece, and a fixed clamping platform 421 is also fixedly provided on the end of the left-right symmetrical mounting frame 413 away from the corresponding rotating plate 412, and a spring rod 423 is symmetrically fixedly provided on the side of the fixed clamping platform 421 away from the corresponding positioning ring 411, and a connecting plate 1 is fixedly provided on the symmetrical spring rods 423 at one end away from the corresponding fixed clamping platform 421, and a sliding clamping platform 422 is elastically slidably provided on the symmetrical spring rods 423, and a positioning rod 424 is fixedly provided on the left sides of the fixed clamping platform 421 and the sliding clamping platform 422, wherein the opposite sides of the left ends of the corresponding fixed clamping platform 421 and the sliding clamping platform 422 are both arc surfaces.

[0033] Before positioning and placing the components of the front triangle frame 1, the paired mounting frames 413 are first aligned with the positioning holes at specific positions on the corresponding positioning rings 411 by rotating and adjusting the rotating plate 412, and the mounting frames 413 and the positioning rings 411 are stably positioned by the threaded pins 414, so that the fixed clamping platform 421 on the mounting frame 413 and the fixed clamping platform 421 on the positioning ring 411 form a specific angle, and then the mounting frame 413 and the two fixed clamping platforms 421 with a specific angle are installed at a specific angle to the corresponding mounting holes on the triangular base plate 2 by bolts and nuts to adapt to the placement position and angle of the corresponding components in the front triangle frame 1. The above-mentioned operation method can realize fast and stable angle adjustment of the clamping assembly 42 to cooperate with different triangular base plates 2 and adapt to the positioning requirements of the matching components of the front triangle frame 1, thereby improving the flexibility of the bicycle frame welding processing operation and reducing the overall processing cost of the bicycle frame.

[0034] When the seat tube 15 is to be clamped by the fixed clamp 421 and the sliding clamp 422, the arc surface of the seat tube 15 is first fitted onto the arc surface of the left end of the fixed clamp 421 and the sliding clamp 422, and then the seat tube 15 is pushed between the fixed clamp 421 and the sliding clamp 422. The seat tube 15 then squeezes the arc surface of the left end of the sliding clamp 422, causing the sliding clamp 422 to move away from the fixed clamp 421 along the corresponding pair of spring rods 423 until the seat tube 15 moves between the fixed clamp 421 and the sliding clamp 422. Under the action of the corresponding spring rods 423, the sliding clamp 422 then cooperates with the fixed clamp 421 to clamp the seat tube 15. The upper tube 13 or the lower tube 14 can also be clamped by the fixed clamp 421 and the sliding clamp 422 according to the same operation.

[0035] When some components of the front triangular frame 1 are to be initially positioned, the bottom bracket 12 is first inserted into the alignment column 313, and then the seat tube 15, the upper tube 13 and the lower tube 14 are clamped in sequence by two sets of fixed clamps 421 and sliding clamps 422 on the rear, upper and lower sides of the triangular base plate 2, respectively, so that the lower end of the seat tube 15 and the rear end of the lower tube 14 are stably butted against the outer surface of the bottom bracket 12, and the rear end of the upper tube 13 is butted against the outer surface of the seat tube 15 (such as Figure 3 As shown), the preliminary placement and positioning of some components of the front triangle frame 1 is completed.

[0036] See also Figure 1 The locking mechanism 5 includes a triangular limit plate 51 arranged on the alignment component 31, a limit component 52 and a docking component 53 are arranged on the triangular limit plate 51, a locking component 54 is commonly arranged on the triangular limit plate 51 and the docking component 53, and a fastening component 55 is arranged on the docking component 53.

[0037] See also Figure 1 , Figure 5 and Figure 6 The limiting assembly 52 includes a plurality of locking frames 521 fixedly arranged on the frame of the triangular limiting plate 51 and corresponding to the fixed clamping platform 421 one by one. The locking frame 521 is provided with a straight line groove 1 which passes through the left and right sides. An L-shaped connecting frame 2 522 is fixedly arranged on the left side of the triangular limiting plate 51. A fixing plate 2 523 which is distributed opposite to the fixing plate 1 312 on the left and right sides is fixedly arranged at the lower end of the L-shaped connecting frame 2 522. A positioning column 2 524 is fixedly arranged on the right side of the fixing plate 2 523.

[0038] See also Figure 3 , Figure 5 and Figure 6 The docking assembly 53 includes two straight grooves that pass through the left and right sides of the triangular limiting plate 51. A guide rod 531 is symmetrically fixed on the left side of the triangular limiting plate 51 through a support. A sliding plate 532 is slidably arranged on the symmetrical guide rods 531. The sliding plate 532 is provided with a clamping groove 533 that passes through the left and right sides and corresponds to the docking column 314 one by one. The clamping groove 533 is composed of a clamping groove and a plug-in groove distributed front and back, wherein the clamping groove is clamped with the corresponding docking groove 315, and the plug-in groove is slidably matched with the corresponding docking column 314.

[0039] When some parts of the front triangle frame 1 are to be limited and locked in position, the two ends of the straight groove 2 on the triangle limiting plate 51 are first aligned and plugged with the corresponding docking column 314, and the left end of the docking column 314 is slidably inserted into the plugging slot in the corresponding snap-in slot 533, and the snap-in slot 533 at the left end of the docking column 314 is aligned with the corresponding snap-in slot. At this time, the alignment column 2 524 is just completely docked and inserted into the right end of the five-way 12, so that the five-way 12 can be limited and locked by the left and right cooperation of the fixing plate 1 312 and the fixing plate 2 523. At the same time, the two ends of the straight groove 1 on each locking frame 521 are also just inserted into the surface of the left positioning rod 424 of the corresponding fixed clamping platform 421 and the sliding clamping platform 422, so that the fixed clamping platform 421 and the sliding clamping platform 422 can stably clamp and fix the corresponding parts of the front triangle frame 1, thereby completing the limit locking of some parts of the front triangle frame 1 that are initially placed and positioned.

[0040] See also Figure 1 , Figure 5 and Figure 6 The locking assembly 54 includes a positioning plate 541 which is fixedly arranged on the rear side of the sliding plate 532 and has an inclined rear end. The positioning plate 541 is provided with a socket that passes through the left and right sides. An elastic sleeve 542 is fixedly arranged on the right side of the triangular limiting plate 51. A plug-in 543 is elastically and slidably arranged in the elastic sleeve 542, which slides left and right through the triangular limiting plate 51 and is plugged into the socket.

[0041] See also Figure 1 , Figure 5 and Figure 6 The fastening assembly 55 includes a connecting rod 551 fixedly arranged on the front side of the sliding plate 532 through a connecting plate 2, a U-shaped seat 552 with an opening facing backward is fixedly arranged on the right end of the connecting rod 551, and baffles 553 are symmetrically fixedly arranged on the upper and lower sides of the U-shaped seat 552.

[0042] When the front triangle frame 1 is to be locked and positioned as a whole, the head tube 11 is first placed into the opening of the U-shaped seat 552, and the two ends of the head tube 11 are limited by the baffle 553, and then the sliding plate 532 is moved backward along the guide rod 531, and the positioning plate 541 moves synchronously and presses the left end of the plug-in 543 to the right through the inclined surface of the rear end until the left end of the plug-in 543 is aligned with the socket on the positioning plate 541. Under the action of the elastic sleeve 542, the plug-in 543 is inserted into the socket and the positioning plate 541 and the sliding plate 532 are stably locked. At this time, the connecting plate 2 synchronously drives the connecting rod 551 and the U-shaped seat 552 to move backward, and the head tube 11 in the U-shaped seat 552 moves synchronously and is tightly connected to the front ends of the upper tube 13 and the lower tube 14. The locking plate 541 and the locking pin 543 are locked together and locked in place.

[0043] At the same time, the above operation can replace the spot welding process of the components of the front triangle frame 1, so that the components of the front triangle frame 1 can be directly locked and positioned, and the welding equipment can directly perform fish scale welding on the fitting positions between the components, which not only greatly simplifies the overall operation steps of the complete welding of the front triangle frame 1, improves the overall processing speed and efficiency of the bicycle frame, but also improves the uniformity and stability of the welding and fixing of the components, thereby improving the accuracy of the welding of the front triangle frame 1 and the final quality of the finished bicycle product.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding tool for producing bicycle frames, used for welding a front triangle frame (1), wherein the front triangle frame (1) comprises a head tube (11), a bottom bracket (12), an upper tube (13), a down tube (14) and a seat tube (15), the welding tool comprising a triangle base plate (2), characterized in that: The triangular base plate (2) is provided with a mounting mechanism (3) and a positioning mechanism (4), the mounting mechanism (3) and the positioning mechanism (4) are jointly provided with a locking mechanism (5), and the positioning mechanism (4) and the locking mechanism (5) are jointly provided with a front triangular frame (1); The mounting mechanism (3) comprises mounting holes which are opened at three corners of the triangular base plate (2) and pass through the triangular base plate (2). A positioning component (31) is arranged on the triangular base plate (2); The positioning mechanism (4) comprises an adjustment component (41) installed at three corners of the triangular base plate (2), and a clamping component (42) is arranged on the adjustment component (41); The locking mechanism (5) comprises a triangular limiting plate (51) arranged on the alignment component (31), a limiting component (52) and a docking component (53) are arranged on the triangular limiting plate (51), a locking component (54) is arranged on the triangular limiting plate (51) and the docking component (53), and a fastening component (55) is arranged on the docking component (53).

2. The welding tool for bicycle frame production according to claim 1, characterized in that: The alignment component (31) comprises an L-shaped connecting frame (311) fixedly arranged on the right side of the triangular base plate (2); a fixing plate (312) is fixedly arranged at the lower end of the L-shaped connecting frame (311); an alignment column (313) is fixedly arranged on the left side of the fixing plate (312); a docking column (314) is fixedly arranged at the front and rear of the left side of the triangular base plate (2); and a docking groove (315) is provided at the left end of the docking column (314).

3. The welding tool for bicycle frame production according to claim 1, characterized in that: The adjustment assembly (41) comprises a positioning ring (411) arranged on the left side of the triangular base plate (2), a plurality of positioning holes penetrating from left to right are evenly opened on the positioning ring (411) in the circumferential direction, a rotating plate (412) is rotatably arranged in the positioning ring (411), mounting frames (413) are symmetrically fixedly arranged on the left and right sides of the rotating plate (412), and threaded pins (414) that are aligned and plugged into the corresponding positioning holes are commonly installed on the left and right symmetrical mounting frames (413), wherein the mounting frame (413) on the right side is fixedly connected to the corresponding mounting hole by bolts and nuts.

4. The welding tool for bicycle frame production according to claim 3, characterized in that: The clamping assembly (42) comprises a fixed clamping platform (421) fixedly connected to the outer surface of the positioning ring (411) through a connecting piece, and a fixed clamping platform (421) is also fixedly arranged on one end of the left-right symmetrical mounting frame (413) away from the corresponding rotating plate (412), and a spring rod (423) is symmetrically fixedly arranged on one side of the fixed clamping platform (421) away from the corresponding positioning ring (411), and a connecting plate 1 is fixedly arranged on one end of the symmetrical spring rods (423) away from the corresponding fixed clamping platform (421), and a sliding clamping platform (422) is elastically slidably arranged on the symmetrical spring rods (423), and a positioning rod (424) is fixedly arranged on the left side of the fixed clamping platform (421) and the sliding clamping platform (422).

5. The welding tool for bicycle frame production according to claim 4, characterized in that: The limiting assembly (52) comprises a plurality of locking frames (521) fixedly arranged on the frame of the triangular limiting plate (51) and corresponding to the fixed clamping platform (421) one by one, the locking frames (521) are provided with a straight line groove (1) running through the left and right sides, an L-shaped connecting frame (2) (522) is fixedly arranged on the left side of the triangular limiting plate (51), a fixing plate (2) (523) which is distributed opposite to the fixing plate (312) on the left and right sides is fixedly arranged at the lower end of the L-shaped connecting frame (2) (522), and a positioning column (2) (524) is fixedly arranged on the right side of the fixing plate (2) (523).

6. The welding tool for bicycle frame production according to claim 2, characterized in that: The docking assembly (53) comprises two straight grooves extending from left to right and formed on a triangular limiting plate (51); a guide rod (531) is symmetrically fixedly arranged on the left side of the triangular limiting plate (51) through a support; a sliding plate (532) is slidably arranged on the symmetrical guide rods (531); a clamping groove (533) extending from left to right and corresponding to the docking column (314) is formed on the sliding plate (532) from front to back, the clamping groove (533) being composed of a clamping groove and a plug-in groove distributed from front to back, wherein the clamping groove is clamped and matched with the corresponding docking groove (315), and the plug-in groove is slidably matched with the corresponding docking column (314).

7. The welding tool for bicycle frame production according to claim 6, characterized in that: The locking assembly (54) comprises a positioning plate (541) fixedly arranged on the rear side of the sliding plate (532) and having an inclined rear end, the positioning plate (541) is provided with a plug hole that passes through left and right, an elastic sleeve (542) is fixedly arranged on the right side of the triangular limiting plate (51), and a plug-in unit (543) is elastically slidably arranged in the elastic sleeve (542) and passes through the triangular limiting plate (51) and is plugged into the plug hole.

8. The welding tool for bicycle frame production according to claim 6, characterized in that: The fastening assembly (55) comprises a connecting rod (551) fixedly arranged on the front side of the sliding plate (532) through a second connecting plate, a U-shaped seat (552) with an opening facing backwards fixedly arranged on the right end of the connecting rod (551), and baffles (553) fixedly arranged symmetrically on the upper and lower sides of the U-shaped seat (552).

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