Seamless welding equipment and process for bicycle production

Abstract

The invention discloses seamless welding equipment and technology for bicycle production, and particularly relates to the field of welding, the seamless welding equipment comprises a workbench and a manipulator, a welding gun is installed at the tail end of the manipulator, a clamping assembly is installed on the workbench, and the clamping assembly is used for clamping a bicycle frame; the bicycle frame comprises an upper pipe, a lower pipe arranged below the upper pipe and a head pipe arranged at the front ends of the upper pipe and the lower pipe. A transition part is arranged at the included angle between the ends, close to the head pipe, of the upper pipe and the lower pipe, and a first attaching groove and a second attaching groove are formed in the upper side and the lower side of the transition part respectively. The transition part is additionally arranged at the crack position of the upper pipe and the lower pipe, the crack of the welded upper pipe and the welded lower pipe is converted into the contact position of the transition part and the upper pipe and the contact position of the transition part and the lower pipe, the welding position is moved outwards, the operation space of the welding end of a welding gun is increased, and the welding efficiency is improved. Therefore, the finally welded bicycle frame does not have cracks which are not welded, and the problem of corrosion caused by accumulated water is avoided.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and more specifically, to a seamless welding device and process for bicycle production. Background Art

[0002] Seamless welding is a welding process that uses high temperature to melt two welding materials and then fuse them together. There is no gap between the weld and the base material. Seamless welding has a fast speed and the joint quality is more uniform than ordinary welding. The weld strength is higher, the corrosion resistance is stronger, and the overall appearance is more beautiful.

[0003] In the manufacturing industry, bicycle production is generally completed through three processes: welding, spraying and assembly. Among them, welding is mainly done on the bicycle frame, which mainly includes the head tube, upper tube, middle tube, down tube, bottom tube, rear upper fork, rear lower fork and hook. These structures need to be welded to form an integral structure.

[0004] At the connection between the upper tube, the lower tube and the head tube, the welding ends of the upper tube, the lower tube and the head tube of some models of bicycles are far apart, and only need to be welded separately during welding, while the welding ends of the upper tube, the lower tube and the head tube of some models of bicycles are close to each other, and need to be clamped and welded at the same time during welding. During the welding process, due to a small angle between the upper tube and the lower tube, the welding end of the welding gun cannot extend to the gap position at the angle, so the prior art welds the places other than the gap position, but does not weld the gap. Due to the existence of the gap, it is difficult to spray paint, and when the bicycle is wading, if water enters this position, it is very easy for water to accumulate and difficult to flow out, thereby causing rust problems at this position. Summary of the invention

[0005] The present invention provides a seamless welding device and process for bicycle production, and aims to solve the following problem: currently during welding, due to a small angle between an upper tube and a lower tube, the welding end of a welding gun cannot extend to the gap at the angle, resulting in the gap being unable to be welded.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a seamless welding device for bicycle production, comprising a workbench and a manipulator, a welding gun is installed at the end of the manipulator, a clamping assembly is installed on the workbench, the clamping assembly is used to clamp a bicycle frame, the bicycle frame comprises an upper tube, a lower tube arranged below the upper tube, and a head tube provided with the front ends of the upper tube and the lower tube; a transition component is arranged at the angle between the upper tube and the lower tube near one end of the head tube, the upper and lower sides of the transition component are respectively provided with a bonding groove 1 and a bonding groove 2, the bonding groove 1 and the bonding groove 2 are respectively arranged to be bonded with the surfaces of the upper tube and the lower tube, the welding gun is used to weld the upper tube, the lower tube, the head tube and the transition component together; a pushing component is arranged at the lower side of the upper tube, the pushing component is used to press the transition component at the angle between the upper tube and the lower tube near one end of the head tube.

[0007] In a preferred embodiment, the lifting material assembly is a lifting material component one, which includes a cylinder one, a connecting rod is fixedly installed on the output end of the cylinder one, a lifting shaft is fixedly installed on one end of the connecting rod, a fixed block is fixedly connected to the end of the lifting shaft close to the connecting rod, a guide shaft is movably inserted at the bottom of the fixed block, a limit plate is fixedly sleeved on the guide shaft, one end of the lifting shaft passes through the limit plate, a spring two is sleeved on the top shaft, and the spring two is used to reset the limit plate toward the head tube. An upper groove and a lower groove are respectively provided at the upper and lower ends of the limit plate, and a support member is provided on the side of the limit plate away from the cylinder one, the support member is used to support the transition member, and the upper groove is arranged to fit the lower surface of the upper tube.

[0008] In a preferred embodiment, when the transition component is separated from the support component and when the second fitting groove is fitted with the surface of the lower tube, a portion of the bottom of the upper tube extends into the first fitting groove.

[0009] In a preferred embodiment, the lifting material assembly is a lifting material component two, which includes a cylinder two, a mounting plate is fixedly installed on the output end of the cylinder two, a push rod is movably inserted on the mounting plate, a spring three is sleeved on the push rod, and the spring three is used to reset the push rod in the direction of the head tube. Both sides of the push rod are rotatably connected with clamping fingers, and the push rod and the clamping fingers are connected by a transmission component, so that when the push rod moves in the direction away from the head tube, the two clamping fingers open to both sides.

[0010] In a preferred embodiment, a U-shaped limit rod is slidably connected to the mounting plate, and a spring four is provided on one side of the U-shaped limit rod. The spring four is used to reset the U-shaped limit rod in a direction away from the head tube. Limit sleeves are installed on the sides of the two clamping fingers that face away from each other, and the openings at both ends of the limit sleeves are hinged to the limit fingers through torsion springs. When the two clamping fingers are opened, the two limit sleeves are respectively sleeved on the two ends of the U-shaped limit rod.

[0011] In a preferred embodiment, a push rod is fixedly connected to one side of cylinder 2, one end of which contacts the side wall of the U-shaped limit rod. When cylinder 2 drives the mounting plate to move back, the push rod pushes the U-shaped limit rod out of the limit sleeve.

[0012] In a preferred embodiment, the clamping assembly includes a middle clamp, which includes a bracket one, a branch pipe is installed at the lower end of the bracket one, the branch pipe is used for inserting the bottom tube of the bicycle frame, one end of the branch pipe is threadedly connected to a rotating wheel, and a pressure rod is movably inserted at the upper end of the bracket one, and a spring one is sleeved on the pressure rod for returning the pressure rod downward, and the pressure rod is used to press against the upper end of the middle tube of the bicycle frame.

[0013] In a preferred embodiment, the clamping assembly also includes a head clamp, which includes a bracket two, on which a fixed frame is fixedly installed, a movable frame is vertically slidably connected to the fixed frame, a tension spring is connected between the fixed frame and the movable frame, and pressure heads are fixedly installed on the sides opposite to each other of the fixed frame and the movable frame, and the two pressure heads are respectively used to press on the upper and lower ends of the head pipe.

[0014] In a preferred embodiment, the clamping assembly further includes a rear clamp, which includes a bracket three and a support shaft fixedly mounted on the rear side of the bracket three, and two ends of the support shaft are used to support two hooks of the bicycle frame.

[0015] The present invention also provides a seamless welding process for bicycle production, using the above-mentioned seamless welding equipment for bicycle production, comprising the following steps:

[0016] Step 1: Use the clamping assembly to clamp the bicycle rack;

[0017] Step 2: Place the transition component on the top material assembly;

[0018] Step 3: Use the lifting assembly to press the transition component against the angle between the upper tube and the lower tube near one end of the head tube, so that the first fitting groove and the second fitting groove fit with the upper tube and the lower tube respectively;

[0019] Step 4: The robot carries a welding gun to weld the upper tube, down tube, head tube and transition parts together.

[0020] The technical effects and advantages of the present invention are as follows: the present invention adds a transition component at the gap between the upper tube and the lower tube, converts the gap between the upper tube and the lower tube that should be welded into a contact position between the transition component and the upper tube and the lower tube, thereby moving the welding position outward and increasing the space in which the welding end of the welding gun can operate, so that the final welded bicycle frame does not have any unwelded gap, avoiding the problem of water accumulation and rust. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the local structure of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the clamping assembly and the ejecting component of the present invention.

[0024] Figure 4 It is a structural schematic diagram of a bicycle frame and a top material component of the present invention.

[0025] Figure 5 It is a structural schematic diagram of the top material component one of the present invention.

[0026] Figure 6 It is a cross-sectional view of a top material component of the present invention.

[0027] Figure 7 It is a cross-sectional schematic diagram of the bottom portion of the upper tube of the present invention extending into the fitting groove 1.

[0028] Figure 8 It is a structural schematic diagram of the second top material component of the present invention.

[0029] Fig. 9 It is a schematic diagram of the structure of the limiting sleeve and the limiting finger of the present invention.

[0030] Fig.10 It is a schematic structural diagram of the transition component of the present invention.

[0031] Fig.11 It is a structural schematic diagram of the bicycle frame of the present invention.

[0032] Fig.12 The present invention is a process flow chart for producing seamless welding of the bicycle.

[0033] The accompanying drawings are marked as follows: 1, workbench; 2, manipulator; 21, welding gun; 3, clamping assembly; 31, middle clamp; 311, bracket 1; 312, branch pipe; 313, rotating wheel; 314, pressure rod; 315, spring 1; 32, head clamp; 321, bracket 2; 322, fixed frame; 323, movable frame; 324, tension spring; 325, pressure head; 33, rear clamp; 331, bracket 3; 332, supporting shaft; 4, ejector component 1; 41, cylinder 1; 42, connecting rod; 43, ejector shaft; 431, spring 2; 44, fixed block; 45, guide shaft; 46, limit plate; 461 , upper groove; 462, lower groove; 47, support member; 5, ejector component two; 51, cylinder two; 52, mounting plate; 53, push rod; 531, spring three; 54, clamp finger; 541, transmission component; 55, U-shaped limit rod; 551, spring four; 56, limit sleeve; 561, limit finger; 57, ejector rod; 100, bicycle frame; 101, upper tube; 102, down tube; 103, head tube; 104, middle tube; 105, upper fork; 106, chain fork; 107, hook; 108, bottom tube; 200, transition component; 201, fitting groove one; 202, fitting groove two. 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] like Fig.11 As shown, the specific structure of the bicycle frame 100 includes an upper tube 101, a lower tube 102, a head tube 103, a middle tube 104, a rear upper fork 105, a rear lower fork 106, a hook 107, and a bottom tube 108. The upper tube 101 and the end of the lower tube 102 close to the head tube 103 are relatively close, and there is a gap at the angle, that is, the position of the transition component 200 in the figure. When welding, the welding end of the welding gun 21 cannot extend to the gap position, so that the position cannot be welded. Therefore, this embodiment provides the following technical solutions.

[0036] Refer to the instruction manual Figure 1-Figure 12A seamless welding device for bicycle production includes a workbench 1 and a manipulator 2. A welding gun 21 is installed at the end of the manipulator 2. A clamping assembly 3 is installed on the workbench 1. The clamping assembly 3 is used to clamp a bicycle frame 100. The bicycle frame 100 includes an upper tube 101, a lower tube 102 arranged below the upper tube 101, and a head tube 103 provided with the front ends of the upper tube 101 and the lower tube 102; a transition component 200 is provided at the angle between the upper tube 101 and the lower tube 102 near one end of the head tube 103. The transition component The upper and lower sides of 200 are respectively provided with a fitting groove 1 201 and a fitting groove 202, and the fitting groove 1 201 and the fitting groove 202 are respectively arranged to fit the surfaces of the upper tube 101 and the lower tube 102, and the welding gun 21 is used to weld the upper tube 101, the lower tube 102, the head tube 103 and the transition component 200 together; the lower side of the upper tube 101 is provided with a pushing assembly, and the pushing assembly is used to press the transition component 200 at the angle position between the upper tube 101 and the lower tube 102 near one end of the head tube 103.

[0037] In this embodiment, the clamping assembly 3 is divided into three parts: a middle clamp 31, a head clamp 32 and a rear clamp 33. Figure 1-Figure 3 As shown, the middle clamp 31 is used to fix the middle tube 104, the head clamp 32 is used to fix the head tube 103, and the rear clamp 33 is used to support the hook 107. Specifically, the middle clamp 31 includes a bracket 311, and a branch pipe 312 is installed at the lower end of the bracket 311. The branch pipe 312 is used for the bottom tube 108 of the bicycle frame 100 to be inserted. A rotating wheel 313 is threadedly connected to one end of the branch pipe 312. A pressure rod 314 is movably inserted at the upper end of the bracket 311. A spring 315 is sleeved on the pressure rod 314 for returning the pressure rod 314 downward. The pressure rod 314 is used to press on the upper end of the middle tube 104 of the bicycle frame 100.

[0038] Furthermore, the head clamp 32 includes a bracket 321, on which a fixed frame 322 is fixedly installed, and a movable frame 323 is vertically slidably connected to the fixed frame 322, a tension spring 324 is connected between the fixed frame 322 and the movable frame 323, and a pressure head 325 is fixedly installed on the side opposite to each other of the fixed frame 322 and the movable frame 323, and the two pressure heads 325 are respectively used to press on the upper and lower ends of the head pipe 103.

[0039] Furthermore, the rear clamp 33 includes a bracket 331 and a support shaft 332 fixedly installed on the rear side of the bracket 331 , and both ends of the support shaft 332 are used to support the two hooks 107 of the bicycle frame 100 .

[0040] In the above technical scheme, the bracket three 331 and the bracket two 321 are both fixed on the workbench 1, the bracket one 311 is fixed on the bracket three 331 and the bracket two 321, and the support shaft 332 can be adjusted on the bracket three 331 by bolts. When clamping the bicycle frame 100, first pull up the pressure rod 314 and a pressure head 325 located on the top, then put the bottom tube 108 on the branch tube 312, and place the head tube 103 on the pressure head 325 located below. After loosening the pressure rod 314 and the pressure head 325, the pressure rod 314 presses on the upper end of the middle tube 104, and the pressure head 325 presses on the upper end of the head tube 103; then align the groove at the end of the hook 107 and insert it into the support shaft 332, support the hook 107 through the support shaft 332, and then install the rotating wheel 313 at one end of the branch tube 312 to fix the bottom tube 108, so as to complete the clamping of the bicycle frame 100.

[0041] In this embodiment, the implementation method is specifically as follows: when welding the bicycle frame 100, specifically when welding the joint position of the upper tube 101, the lower tube 102 and the head tube 103, first use the clamping assembly 3 to clamp the bicycle frame 100, and then place the transition component 200 on the top material assembly. Secondly, use the top material assembly to press the transition component 200 at the angle position between the upper tube 101 and the lower tube 102 near one end of the head tube 103, that is, at the gap position between the upper tube 101 and the lower tube 102, so that the fitting groove 1 201 and the fitting groove 202 are respectively fitted with the upper tube 101 and the lower tube 102. Finally, the manipulator 2 carries the welding gun 21 to weld the upper tube 101, the lower tube 102, the head tube 103 and the transition component 200 together.

[0042] The above technical solution converts the gap between the upper tube 101 and the lower tube 102 that should be welded into a contact position between the transition component 200 and the upper tube 101 and the lower tube 102 by adding a transition component 200 at the gap between the upper tube 101 and the lower tube 102, thereby moving the welding position outward and increasing the space in which the welding end of the welding gun 21 can operate, so that the final welded bicycle frame 100 does not have any unwelded gap, avoiding the problem of water accumulation and rust.

[0043] Refer to the instruction manual Figure 5 and Figure 6The present embodiment provides a specific structure of a lifting assembly. Specifically, the lifting assembly is a lifting component 4. The lifting component 4 includes a cylinder 41. A connecting rod 42 is fixedly installed at the output end of the cylinder 41. A lifting shaft 43 is fixedly installed at one end of the connecting rod 42. A fixing block 44 is fixedly connected to the end of the lifting shaft 43 close to the connecting rod 42. A guide shaft 45 is movably inserted at the bottom of the fixing block 44. A limiting plate 46 is fixedly sleeved on the guide shaft 45. One end of the lifting shaft 43 passes through the limiting plate 46. A spring 431 is sleeved on the lifting shaft 43. The spring 431 is used to reset the limiting plate 46 toward the direction of the head pipe 103. An upper groove 461 and a lower groove 462 are respectively provided at the upper and lower ends of the limiting plate 46. A support member 47 is provided on the side of the limiting plate 46 away from the cylinder 41. The support member 47 is used to support the transition component 200. The upper groove 461 is arranged to fit the lower surface of the upper tube 101.

[0044] It should be noted that when placing the transition component 200, the transition component 200 is placed on the support member 47, and the support member 47 supports the fitting groove 202 of the transition component 200. After the placement is completed, the fitting groove 1 201 is in contact with the lower surface of the upper tube 101. The purpose is to use the support member 47 and the upper tube 101 to limit the transition component 200 and prevent it from sliding out to both sides from the support member 47. After the placement is completed, the cylinder 41 drives the transition component 200 to move toward the direction of the head pipe 103, that is, the position of the gap. During the movement, the lower groove 462 first contacts the surface of the lower tube 102. At this time, the limit plate 46 and the support member 47 can no longer move forward. The cylinder 41 will continue to drive the top shaft 43 to move forward, so that the top shaft 43 pushes the transition component 200 away from the support member 47, so that the transition component 200 is inserted at the position of the gap to wait for welding. During welding, after welding a section of the transition component 200, the top material component 4 is removed, and there is no need to press the transition component 200 anymore, so as to make room for the welding gun 21 to operate.

[0045] Furthermore, if Figure 7 As shown, when the transition component 200 is separated from the support component 47 and when the second fitting groove 202 is fitted with the surface of the lower tube 102 , the bottom portion of the upper tube 101 extends into the first fitting groove 201 .

[0046] It should be noted that, after the transition component 200 is pushed out from the support member 47, the transition component 200 moves downward due to the force of gravity, so that the second fitting groove 202 fits with the upper surface of the lower tube 102. Figure 7 As shown, it is ensured that in this state a portion of the bottom of the upper tube 101 extends into the inner side of the fitting groove 201, so that during the subsequent movement of the transition component 200 toward the head tube 103, it will not fall out from both sides of the upper tube 101 and the lower tube 102.

[0047] The above technical solution adopts the method of directly pushing the transition component 200 toward the gap through the setting of the lifting component 4, without using any components for clamping the transition component 200. Its purpose is to prevent the welding gun 21 from colliding with the components for clamping the transition component 200 during welding because the space at this position is small.

[0048] Refer to the instruction manual Figure 8 and Fig. 9 The present embodiment provides another specific structure of a material ejecting assembly. Specifically, the material ejecting assembly is a material ejecting component 2 5. The material ejecting component 2 5 includes a cylinder 2 51. A mounting plate 52 is fixedly mounted on the output end of the cylinder 2 51. A push rod 53 is movably connected to the mounting plate 52. A spring 3 531 is sleeved on the push rod 53. The spring 3 531 is used to reset the push rod 53 toward the direction of the head tube 103. Both sides of the push rod 53 are rotatably connected with clamping fingers 54. The push rod 53 and the clamping fingers 54 are connected to each other through a transmission component 541, so that when the push rod 53 moves in a direction away from the head tube 103, the two clamping fingers 54 open to both sides.

[0049] Furthermore, a U-shaped limit rod 55 is slidably connected to the mounting plate 52, and a spring four 551 is provided on one side of the U-shaped limit rod 55. The spring four 551 is used to reset the U-shaped limit rod 55 in a direction away from the head pipe 103. Limit sleeves 56 are installed on the sides of the two clamping fingers 54 that are away from each other. The openings at both ends of the limit sleeves 56 are hinged to the limit fingers 561 through torsion springs. When the two clamping fingers 54 are opened, the two limit sleeves 56 are respectively sleeved on the two ends of the U-shaped limit rod 55.

[0050] Furthermore, a push rod 57 is fixedly connected to one side of the cylinder 2 51 , and one end of the push rod 57 contacts the side wall of the U-shaped limiting rod 55 . When the cylinder 2 51 drives the mounting plate 52 to move back, the push rod 57 pushes the U-shaped limiting rod 55 out of the limiting sleeve 56 .

[0051] It should be noted that the transmission component 541 is composed of two gears and a rack, the rack is installed on the side of the push rod 53, the first gear is installed at one end of the clamping finger 54, and the other gear is transmitted between the first gear and the rack, so that when the push rod 53 moves away from the head pipe 103, the two clamping fingers 54 open to both sides.

[0052] In specific operation, the transition component 200 is first placed between the two clamping fingers 54, the transition component 200 is clamped by the two clamping fingers 54, the push rod 53 presses against the rear wall of the transition component 200, and then the transition component 200 is driven by the second cylinder 51 to move to the position of the gap. When the transition component 200 is inserted into the gap, the second cylinder 51 continues to extend. At this time, Figure 8As shown, the push rod 53 presses the transition component 200 and moves downward relative to the push rod 53, and the spring 3 531 is compressed. During this process, the push rod 53 drives the clamping fingers 54 to open to both sides through the transmission component 541, and the clamping fingers 54 rotate 180 degrees. Finally, the two limit sleeves 56 are respectively sleeved on the two ends of the top rod 57, as shown in FIG. Fig. 9 As shown, specifically, the U-shaped limiting rod 55 enters the limiting sleeve 56 from the position of the two limiting fingers 561 relative to the limiting sleeve 56, and limiting blocks are set at both ends of the limiting sleeve 56, so that the limiting fingers 561 can no longer rotate outward, but can only rotate in a certain area inside the limiting sleeve 56, so that the limiting sleeve 56 cannot be separated from the U-shaped limiting rod 55 from the position of the two limiting fingers 561. After welding is completed, the cylinder 2 51 drives the mounting plate 52 to reset. When the reset is about to be completed, the push rod 57 pushes the U-shaped limiting rod 55 to move, so that the end of the U-shaped limiting rod 55 is separated from the limiting sleeve 56 along the axial direction of the limiting sleeve 56. At this time, under the action of the spring 3 531, the push rod 53 extends out to reset, and the push rod 53 drives the clamping finger 54 to reset through the transmission component 541, that is, reset to the position as shown in FIG. Figure 8 Status shown.

[0053] When the transition component 200 is pushed to the gap position, the two limiting sleeves 56 can be opened and limited by continuing to push. The purpose is to prevent the welding gun 21 from colliding with the limiting sleeves 56 during welding because the space at this position is small.

[0054] like Fig.12 As shown, a seamless welding process for bicycle production, using the above-mentioned seamless welding equipment for bicycle production, comprises the following steps:

[0055] Step 1: Use the clamping assembly 3 to clamp the bicycle frame 100;

[0056] Step 2: placing the transition component 200 on the top material assembly;

[0057] Step 3: Use the pushing assembly to push the transition component 200 against the angle between the upper tube 101 and the lower tube 102 near one end of the head tube 103, so that the fitting groove 1 201 and the fitting groove 202 fit with the upper tube 101 and the lower tube 102 respectively;

[0058] Step 4: The robot 2 carries the welding gun 21 to weld the upper tube 101 , the lower tube 102 , the head tube 103 and the transition component 200 together.

[0059] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seamless welding equipment for bicycle production, characterized by: The invention comprises a workbench (1) and a manipulator (2), wherein a welding gun (21) is installed at the end of the manipulator (2), and a clamping assembly (3) is installed on the workbench (1), wherein the clamping assembly (3) is used to clamp a bicycle frame (100), wherein the bicycle frame (100) comprises an upper tube (101), a lower tube (102) arranged below the upper tube (101), and a head tube (103) provided at the front ends of the upper tube (101) and the lower tube (102); A transition component (200) is provided at the angle between the upper tube (101) and the lower tube (102) near one end of the head tube (103); the upper and lower sides of the transition component (200) are provided with a first bonding groove (201) and a second bonding groove (202), respectively; the first bonding groove (201) and the second bonding groove (202) are respectively arranged to be bonded to the surfaces of the upper tube (101) and the lower tube (102); and the welding gun (21) is used to weld the upper tube (101), the lower tube (102), the head tube (103) and the transition component (200) together; A pushing component is provided at the lower side of the upper tube (101), and the pushing component is used to push the transition component (200) at the angle between the upper tube (101) and the lower tube (102) close to one end of the head tube (103).

2. A bicycle production seamless welding equipment according to claim 1, characterized in that: The ejection assembly is an ejection component (4), and the ejection component (4) comprises a cylinder (41). A connecting rod (42) is fixedly mounted on the output end of the cylinder (41), and a ejection shaft (43) is fixedly mounted on one end of the connecting rod (42). An end of the ejection shaft (43) close to the connecting rod (42) is fixedly connected to a fixed block (44). A guide shaft (45) is movably inserted at the bottom of the fixed block (44). A limit plate (46) is fixedly sleeved on the guide shaft (45), and one end of the ejection shaft (43) passes through the limit plate. (46), a spring 2 (431) is sleeved on the top shaft (43), and the spring 2 (431) is used to reset the limit plate (46) in the direction of the head pipe (103). The upper end and the lower end of the limit plate (46) are respectively provided with an upper groove (461) and a lower groove (462). A support member (47) is provided on the side of the limit plate (46) away from the cylinder 1 (41), and the support member (47) is used to support the transition component (200). The upper groove (461) is arranged to fit the lower surface of the upper pipe (101).

3. A bicycle production seamless welding equipment according to claim 2, characterized in that: When the transition component (200) is separated from the support component (47), and when the second fitting groove (202) fits with the surface of the lower tube (102), a portion of the bottom of the upper tube (101) extends into the first fitting groove (201).

4. A bicycle production seamless welding equipment according to claim 1, characterized in that: The ejection component is ejection component 2 (5), and the ejection component 2 (5) includes cylinder 2 (51). A mounting plate (52) is fixedly mounted on the output end of the cylinder 2 (51), and a push rod (53) is movably inserted on the mounting plate (52). A spring 3 (531) is sleeved on the push rod (53), and the spring 3 (531) is used to reset the push rod (53) in the direction of the head tube (103). Both sides of the push rod (53) are rotatably connected with clamping fingers (54), and the push rod (53) and the clamping fingers (54) are connected to each other through a transmission component (541), so that when the push rod (53) moves in a direction away from the head tube (103), the two clamping fingers (54) open to both sides.

5. A bicycle production seamless welding equipment according to claim 4, characterized in that: A U-shaped limiting rod (55) is slidably connected to the mounting plate (52), and a spring four (551) is arranged on one side of the U-shaped limiting rod (55). The spring four (551) is used to reset the U-shaped limiting rod (55) in a direction away from the head tube (103). A limiting sleeve (56) is installed on the mutually diverging sides of the two clamping fingers (54), and the openings at both ends of the limiting sleeve (56) are hinged to the limiting fingers (561) through a torsion spring. When the two clamping fingers (54) are opened, the two limiting sleeves (56) are respectively sleeved on the two ends of the U-shaped limiting rod (55).

6. A seamless welding equipment for bicycle production according to claim 4 or 5, characterized in that: A push rod (57) is fixedly connected to one side of the second cylinder (51), and one end of the push rod (57) contacts the side wall of the U-shaped limiting rod (55). When the second cylinder (51) drives the mounting plate (52) to move back, the push rod (57) pushes the U-shaped limiting rod (55) out of the limiting sleeve (56).

7. The seamless welding equipment for bicycle production according to claim 1, characterized in that: The clamping assembly (3) comprises a middle clamp (31), and the middle clamp (31) comprises a bracket (311). A branch pipe (312) is installed at the lower end of the bracket (311), and the branch pipe (312) is used for inserting the bottom pipe (108) of the bicycle frame (100). One end of the branch pipe (312) is threadedly connected with a rotating wheel (313). A pressure rod (314) is movably inserted at the upper end of the bracket (311). A spring (315) is sleeved on the pressure rod (314) for returning the pressure rod (314) downward. The pressure rod (314) is used to press against the upper end of the middle pipe (104) of the bicycle frame (100).

8. A bicycle production seamless welding equipment according to claim 7, characterized in that: The clamping assembly (3) also includes a head clamp (32), and the head clamp (32) includes a second bracket (321), a fixed frame (322) is fixedly mounted on the second bracket (321), a movable frame (323) is vertically slidably connected to the fixed frame (322), a tension spring (324) is connected between the fixed frame (322) and the movable frame (323), and a pressure head (325) is fixedly mounted on the side opposite to each other of the fixed frame (322) and the movable frame (323), and the two pressure heads (325) are respectively used to press on the upper and lower ends of the head pipe (103).

9. A bicycle production seamless welding equipment according to claim 8, characterized in that: The clamping assembly (3) further comprises a rear clamp (33), wherein the rear clamp (33) comprises a bracket three (331) and a support shaft (332) fixedly mounted on the rear side of the bracket three (331), wherein both ends of the support shaft (332) are used to support two hook claws (107) of the bicycle frame (100).

10. A seamless welding process for bicycle production, using a seamless welding device for bicycle production as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Use the clamping assembly (3) to clamp the bicycle frame (100); Step 2: placing the transition component (200) on the top material assembly; Step 3: Use a pushing assembly to push the transition component (200) against the angle between the upper tube (101) and the lower tube (102) near one end of the head tube (103), so that the first fitting groove (201) and the second fitting groove (202) fit with the upper tube (101) and the lower tube (102) respectively; Step 4: The robot (2) carries a welding gun (21) to weld the upper tube (101), the lower tube (102), the head tube (103) and the transition component (200) together.

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