Motorcycle frame welding tool
By designing welding fixtures for motorcycle frames, using various positioning devices and clamps to fix the positions of components, and combining this with robotic welding, the problem of dimensional errors caused by welding deformation was solved, achieving efficient and precise frame production.
Patent Information
- Application Number
- CN202422843390.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-11-21
AI Technical Summary
In the motorcycle frame production process, welding deformation can cause errors in the position and size of components. Existing methods require repeated adjustments to the fixtures or hammering, which wastes materials and manpower and makes it difficult to guarantee welding quality.
Design a motorcycle frame welding fixture, including various positioning devices and clamps, to fix the position of components by a robotic welding device, ensure the welding sequence and current and voltage are fixed, reduce human intervention, and achieve one-time production of qualified frames.
By using tooling positioning fixtures and robotic welding, welding deformation is reduced, improving the precision and efficiency of frame production, and lowering material and labor costs.
Smart Images
Figure CN223465785U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motorcycle production technical field especially relates to a motorcycle frame welding frock. BACKGROUND
[0002] In the frame production process, a plurality of components need to be welded together to assemble into a frame assembly, and a motorcycle frame needs to go through a plurality of welding processes to be produced, and in the multi-step welding process, a plurality of welding fixtures are used for clamping, and each welding process causes deformation due to high temperature, and the position and size of the components change, resulting in errors in the position and size of the welded components on the pipe, thereby affecting the final assembly.
[0003] However, due to different procurement times and large material differences, the welding deformation amount will also differ, and the welding fixture needs to be adjusted. The current solution is to find reasonable counter-deformation sizes through repeated welding tests, to find the deformation data, to pre-judge the size and position to be welded, and to adjust the welding fixture to make the size after welding meet the drawing requirements. Another way is to adjust the position of the components by hammering in the later stage. It needs to be judged according to experience, which wastes raw materials, time and manpower. SUMMARY
[0004] To overcome the above-mentioned deficiencies, the utility model discloses a motorcycle frame welding frock.
[0005] The utility model discloses a motorcycle frame welding frock, including the chassis, the vertical pipe positioner, the front main beam positioner, the front side main beam presser, the zero point positioner, the rear side main beam presser, the rear crossbeam presser are equipped in proper order on the chassis, the upper of the chassis is equipped with the front end support, the vertical pipe positioner is equipped on the front end support, and the vertical pipe positioner includes the vertical pipe lower end positioner, the vertical pipe upper end presser, the rear side of the front end support is equipped with the front main beam positioner, the left and right sides of the chassis are equipped with the front side main beam presser respectively, and the side main beam top block is equipped on the chassis, the left and right sides of the chassis are equipped with the zero point positioner respectively, and the first intermediate crossbeam bracket and the second intermediate crossbeam bracket are equipped between two zero point positioners, the rear end of the chassis is equipped with the rear crossbeam presser and the rear side main beam presser, the rear crossbeam presser is installed on the rear end support, and the rear side main beam presser is located on the two sides of the rear end support respectively, one side of the rear end support is equipped with the first bending positioner, the other side is equipped with the second bending positioner, and the shock absorber positioning column is further equipped on the rear side of the rear end support.
[0006] Specifically, the vertical pipe lower end positioner and the vertical pipe upper end presser are assembled on the inclined mounting plate, and the inclined mounting plate is fixed on the front end support through the support.
[0007] Specifically, the riser upper end presser is arranged at one end of a riser pressing rod, the middle part of the riser pressing rod is hinged with a riser connecting rod, the riser connecting rod is hinged with the upper end of a telescopic rod of a riser pressing cylinder, the bottom of the riser pressing cylinder is connected with an inclined mounting plate through a rotating shaft, the rear end of the riser connecting rod is hinged with a riser hinged seat, the riser hinged seat is arranged outside the riser pressing cylinder, the riser lower end positioning device and the riser upper end presser each include two coaxially arranged sleeve pipes with different diameters, the small-diameter sleeve pipe is arranged in the large-diameter sleeve pipe.
[0008] Specifically, the inclined mounting plate is provided with a riser pressing assembly seat, the riser hinged seat is arranged on the riser pressing assembly seat, a connecting rod limiting frame is further arranged above the riser pressing assembly seat, the connecting rod limiting frame is arranged below the riser connecting rod, and a U-shaped groove is arranged above the connecting rod limiting frame, the riser connecting rod is clamped into the U-shaped groove of the connecting rod limiting frame.
[0009] Specifically, the inclined mounting plate is further provided with a riser clamp, and the riser clamp is arranged on a telescopic rod of a riser clamp cylinder.
[0010] Specifically, the front main beam positioner includes a front main beam positioning needle and a front main beam positioning block, the front main beam positioning needle and the front main beam positioning block are arranged on one side of a front main beam positioning vertical plate, and the front main beam positioning vertical plate is fixedly arranged at the end of a telescopic rod of a front main beam positioning cylinder.
[0011] Specifically, the front side main beam presser is arranged in front of a side main beam top block, the front side main beam presser includes a front side main beam pressing block and a front side main beam cylinder, the front side main beam pressing block is arranged on a front side main beam pressing head, the front side main beam pressing head is arranged at the upper end of a front side main beam pressing rod, the lower end of the front side main beam pressing rod is hinged with a front side main beam hinged seat, one end of a front side main beam connecting rod is hinged with the upper end of the front side main beam pressing rod through a rotating shaft, the other end of the front side main beam connecting rod is hinged with a telescopic rod of the front side main beam cylinder, and the front side main beam pressing block is detachably arranged on the front side main beam pressing head, and the side main beam top block is in an L-shaped structure.
[0012] Specifically, the zero point positioner includes a zero point top column, a limiting support and a zero point cylinder, the zero point top column is arranged at the end of a telescopic rod of the zero point cylinder, the zero point positioner further includes the limiting support, a limiting through hole is arranged in the limiting support, the zero point top column passes through and moves along the limiting through hole.
[0013] Specifically, the first intermediate cross beam bracket and the second intermediate cross beam bracket, the first intermediate cross beam bracket is arranged on a first zero point positioning frame, a first bent connecting rod pad block is arranged behind the first zero point positioning frame, the second intermediate cross beam bracket is arranged on a second zero point positioning frame, and a second bent connecting rod pad block is arranged behind the second zero point positioning frame.
[0014] Specifically, the rear side main beam presser comprises a rear side pressing block, a rear side cylinder and a rear side cushion block, the rear side pressing block is installed above the telescopic rod of the rear side cylinder, and the rear side cushion block is fixedly arranged below the rear side pressing block.
[0015] Specifically, the rear cross beam presser comprises a first rear cross beam pressing block, a second rear cross beam limiting block and a rear beam cushion block, the rear beam cushion block is arranged on the rear end support, the first rear cross beam pressing block is fixed to the front end of the first rear pressing rod, a limiting hole is arranged on the first rear pressing rod, a first rear limiting light shaft is arranged in the limiting hole, the first rear limiting light shaft is fixed to the rear beam cushion block or the rear end support, the rear end of the first rear pressing rod is hinged to the telescopic rod of the first rear cylinder, the middle part of the first rear pressing rod is hinged to the upper end of the first rear connecting rod, the lower end of the first rear connecting rod is hinged to the first rear hinged seat, the first rear hinged seat is fixed to the rear end support, the second rear cross beam limiting block is fixed to one end of the second rear pressing rod, the other end of the second rear pressing rod is hinged to the telescopic rod of the second rear cylinder, the middle part of the second rear pressing rod is hinged to the upper end of the second rear connecting rod, and the lower end of the second rear connecting rod is hinged to the second rear hinged seat.
[0016] Specifically, the first bending positioner comprises a first bending upper jacking post and a first bending lower jacking post, the first bending upper jacking post and the first bending lower jacking post are installed on a first bending positioning connecting plate, the first bending upper jacking post is located at the upper rear side of the first bending lower jacking post, and the first bending positioning connecting plate is assembled on the telescopic rod of a first bending positioning cylinder.
[0017] Specifically, the second bending positioner comprises a second bending inner side limiting plate, a second bending jacking post and a second bending positioning cylinder, the second bending inner side limiting plate and the second bending jacking post are fixedly installed on a second bending mounting block, the second bending mounting block is installed on a second bending top block, the second bending top block is assembled on the telescopic rod of the second bending positioning cylinder, and the second bending positioning cylinder is installed on a second slope support.
[0018] The utility model discloses a positioning fixture of each part on tooling is utilized, the main part of the frame is fixed, positioned, then utilizes the robot welding device, the current voltage is fixed when welding, the welding sequence is fixed, the welding length is fixed, need not be controlled by manpower, one -off compression component, utilizes the flexibility of component, makes it with standard welding fixture very good adhesion, thereby one -off production qualified frame. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is the structural schematic diagram of the utility model.
[0020] Figure 2 It is the structural schematic diagram of the head vertical pipe clamping device of the utility model.
[0021] Figure 3 The front side main beam presser of the utility model.
[0022] Figure 4 The zero point positioner of the utility model.
[0023] Figure 5 The rear end positioning device structure schematic view of the utility model.
[0024] Figure 6 The rear end positioning device another direction structure schematic view of the utility model.
[0025] Figure 7 The working state structure schematic of the utility model Figure 1 .
[0026] Figure 8 The working state structure schematic of the utility model Figure 2 , the state of rear end positioning device part removes the shell.
[0027] Figure 9 The structure schematic view of the frame body of the utility model's tool production.
[0028] Figure 10 The structure enlarged schematic view of the utility model's A place.
[0029] In the drawing, 101 is a front main beam body, 102 is a vehicle head stand pipe body, 103 is a side main beam body, 1031 is a front side main beam body, 1032 is a middle side main beam body, 1033 is a rear side main beam body, 104 is a front end crossbeam body, 105 is a middle crossbeam body, 106 is a bending connecting rod body, 107 is a rear end crossbeam body, 108 is a side positioning frame body, and 109 is a shock absorber mounting frame body.
[0030] 1 is a base frame, 2 is a front end support, 301 is a stand pipe lower end positioner, 302 is a stand pipe upper end presser, 3021 is a stand pipe pressing rod, 3022 is a stand pipe connecting rod, 3023 is a stand pipe hinged seat, 303 is a stand pipe clamp, 3031 is a stand pipe clamp air cylinder, 4 is a front main beam positioner, 5 is a front side main beam presser, 6 is a side main beam top block, 7 is a zero point positioner, 8 is a rear side main beam presser, 9 is a rear crossbeam presser, 10 is a controller, 11 is a first bending positioner, 12 is a second bending positioner, and 13 is a shock absorber positioning column. DETAILED DESCRIPTION
[0031] The utility model will be further explained in detail in combination with the drawings.
[0032] As Figures 1 to 10The motorcycle frame welding tool shown includes a chassis 1, which is sequentially provided with a vertical pipe positioning device, a front main beam positioner 4, a front side main beam presser 5, a zero positioner 7, a rear side main beam presser 8, and a rear cross beam presser 9. The upper portion of the chassis 1 is provided with a front end support 2, which is provided with the vertical pipe positioning device. The vertical pipe positioning device includes a vertical pipe lower end positioner 301 and a vertical pipe upper end presser 302. The rear side of the front end support 2 is provided with the front main beam positioner 4. The left and right sides of the chassis 1 are respectively provided with the front side main beam presser 5 and a side main beam top block 6. The left and right sides of the chassis 1 are respectively provided with the zero positioner 7. The two zero positioners 7 are provided with a first intermediate cross beam bracket 704 and a second intermediate cross beam bracket 705. The rear end of the chassis 1 is provided with the rear cross beam presser 9 and the rear side main beam presser 8. The rear cross beam presser 9 is installed on a rear end support 901. The rear side main beam presser 8 is respectively located on the two sides of the rear end support 901. One side of the rear end support 901 is provided with a first bending positioner 11, and the other side is provided with a second bending positioner 12. The side of the rear end support located at the rear is further provided with a shock absorber positioning column 13. The first bending positioner 11 and the second bending positioner 12 are located in front of the rear end support.
[0033] Specifically, the vertical pipe lower end positioner 301 and the vertical pipe upper end presser 302 are assembled on an inclined mounting plate 3011, which is fixed on the front end support 2 through a support.
[0034] Specifically, the vertical pipe upper end presser 302 is arranged at one end of a vertical pipe pressing rod 3021. The middle portion of the vertical pipe pressing rod 3021 is hinged with a vertical pipe connecting rod 3022. The vertical pipe connecting rod 3022 is hinged with the upper end of the telescopic rod of a vertical pipe pressing cylinder. The bottom of the vertical pipe pressing cylinder is connected with the inclined mounting plate 3011 through a rotating shaft. The rear end of the vertical pipe connecting rod 3022 is hinged with a vertical pipe hinge seat 3023, which is arranged outside the vertical pipe pressing cylinder. The vertical pipe lower end positioner 301 and the vertical pipe upper end presser 302 each include two coaxially arranged sleeve pipes with different diameters. The small-diameter sleeve pipe is located in the large-diameter sleeve pipe. The head vertical pipe body 102 is inserted into the annular limiting groove between the two sleeve pipes to realize positioning. The telescopic rod of the vertical pipe pressing cylinder is raised to lift the vertical pipe upper end presser 302. The lower end of the vertical pipe body 102 is placed into the vertical pipe lower end presser 301. The telescopic rod of the vertical pipe pressing cylinder is lowered. The vertical pipe upper end presser 302 is buckled on the top of the vertical pipe body 102, as shown, to realize the fixation of the vertical pipe body for welding. After the welding is completed, the vertical pipe pressing cylinder is started. The telescopic rod is raised to lift the vertical pipe upper end presser 302 for convenient removal. Figure 8
[0035] Specifically, the inclined mounting plate 3011 is provided with a riser pressing assembly seat 3024, the riser hinged seat 3023 is installed on the riser pressing assembly seat 3024, and a connecting rod limiting frame 3035 is further arranged above the riser pressing assembly seat 3024. The connecting rod limiting frame 3035 is located below the riser connecting rod 3021 and plays a supporting role. Meanwhile, a U-shaped groove is arranged above the connecting rod limiting frame 3035, the U-shaped groove of the connecting rod limiting frame 3035 is clamped into the lower part of the riser connecting rod 3021, preventing the riser connecting rod 3021 from shaking left and right, and playing a supporting and limiting role.
[0036] Specifically, the inclined mounting plate 3011 is further provided with a riser clamp, which is assembled on the telescopic rod of the riser clamp air cylinder 3031 and is used for clamping the components to be welded on the vehicle head riser body 102 from the side, thereby facilitating welding.
[0037] Specifically, the front main beam positioner 4 comprises a front main beam positioning needle 401 and a front main beam positioning block 402, which are assembled on one side of a front main beam positioning vertical plate 403. The front main beam positioning vertical plate 403 is fixedly arranged at the end of the telescopic rod of a front main beam positioning air cylinder 404. The front main beam positioning needle 401 and the front main beam positioning block 402 can be fixed and separated by the extension and retraction of the telescopic rod of the front main beam positioning air cylinder 404.
[0038] Specifically, the front side main beam press 5 is located in front of the side main beam top block 6. The front side main beam press 5 comprises a front side main beam pressing block 501 and a front side main beam air cylinder 506. The front side main beam pressing block 501 is assembled on a front side main beam pressing head 502. The front side main beam pressing head 502 is arranged at the upper end of a front side main beam pressing rod. The lower end of the front side main beam pressing rod 503 is hinged with a front side main beam hinged seat 504. The upper end of the front side main beam pressing rod 503 is hinged with one end of a front side main beam connecting rod 505 through a rotating shaft. The other end of the front side main beam connecting rod 505 is hinged with the telescopic rod of the front side main beam air cylinder 506. The telescopic rod of the front side main beam air cylinder 506 is extended and retracted to push the front side main beam pressing rod 503, drive the front side main beam pressing head 502 and the front side main beam pressing block 501 to press downward. The front side main beam pressing block 501 is detachably assembled on the front side main beam pressing head 502, which is convenient for replacement after wear. Meanwhile, appropriate front side main beam pressing blocks 501 can be replaced according to the thickness of the side main beam body 103. The side main beam top block 6 is in an L-shaped structure, in which the vertical side of the L-shaped structure is arranged at the inner side. The front side main beam pressing rod 503, the front side main beam hinged seat 504, the front side main beam connecting rod 505 and the front side main beam air cylinder 506 of the front side main beam press 5 are all located at the outer side of the front side main beam pressing block 501, as shown in FIG. 6. The front side main beam body 1031 is placed above the side main beam top block 6. The front side main beam pressing block 501 of the front side main beam press 5 is pressed above the front side main beam body 1031. The front side main beam body 1031 is pressed tightly by the cooperation of the front side main beam pressing block 501 and the front side main beam press 5. Figure 8
[0039] Specifically, the zero-position locator 7 comprises a zero-position top column 701, a limiting support 702, and a zero-position cylinder 703. The zero-position top column 701 is arranged at the end of the telescopic rod of the zero-position cylinder 703 and is driven to extend and retract by the zero-position cylinder 703. In order to maintain the stability of the zero-position top column 701, the zero-position locator 7 further comprises the limiting support 702, which is provided with a limiting through hole. The zero-position top column 701 passes through the limiting through hole and moves along the limiting through hole to prevent the zero-position top column 701 from shaking. The zero-position locator 7 is used for fixing the side positioning frame body 108 and facilitates the welding of the side positioning frame body 108 on the side main beam body 103.
[0040] Specifically, the first intermediate cross beam bracket 704 and the second intermediate cross beam bracket 705 are used for supporting the intermediate cross beam body 105 between the two side main beam bodies 103. The first intermediate cross beam bracket 704 is arranged on the first zero-position positioning frame 7041 and is provided with a first bent connecting rod pad 7042 at the rear of the first zero-position positioning frame 7041. The second intermediate cross beam bracket 705 is arranged on the second zero-position positioning frame 7051 and is provided with a second bent connecting rod pad 7052 at the rear of the second zero-position positioning frame 7051. The position where the two side main beam bodies are generally bent upward is provided with a bent connecting rod body 106. The first bent connecting rod pad 7042 and the second bent connecting rod pad 7052 are used for supporting the bent connecting rod body 106 and also realize the fixation of the intermediate cross beam 105 and the bent connecting rod body 106.
[0041] Specifically, the rear side main beam presser 8 comprises a rear side pressing block 801, a rear side cylinder 802, and a rear side pad 803. The rear side pressing block 801 is arranged above the telescopic rod of the rear side cylinder 802. The rear side pad 803 is fixedly arranged below the rear side pressing block 801 and is used for clamping the support assembly on the rear side main beam body to facilitate the welding.
[0042] Specifically, the rear cross beam presser 9 comprises a first rear cross beam pressing block 901, a second rear cross beam limiting block 902, and a rear beam cushion block 903, the rear beam cushion block 903 is arranged on the rear end support 14, the first rear cross beam pressing block 901 is fixed on the front end of a first rear pressing rod 9011, the first rear pressing rod 9011 is provided with a limiting hole 9016, a first rear limiting light shaft 9012 is arranged in the limiting hole 9016, the first rear limiting light shaft 9012 is fixed on the rear beam cushion block 903 or the rear end support 14, the rear end of the first rear pressing rod 9011 is hinged with the telescopic rod of a first rear air cylinder 9014, the middle part of the first rear pressing rod 9011 is hinged with the upper end of a first rear connecting rod 9013, the lower end of the first rear connecting rod 9013 is hinged with a first rear hinge seat 9015, the first rear hinge seat 9015 is fixed on the rear end support 14, so as to realize the up-down movement of the first rear cross beam pressing block 901, the second rear cross beam limiting block 902 is fixed on one end of a second rear pressing rod 9021, the other end of the second rear pressing rod 9021 is hinged with a telescopic rod 9025 of a second rear air cylinder, the middle part of the second rear pressing rod 9021 is hinged with the upper end of a second rear connecting rod 9022, the lower end of the second rear connecting rod 9022 is hinged with a second rear hinge seat 9023, so as to realize the pressing and lifting of the second rear cross beam pressing block 902, in use, the rear cross beam body 107 is placed on the rear beam cushion block 903, the first rear cross beam pressing block 901 presses the rear cross beam body 107 from the rear upper side, and the second rear cross beam pressing block 902 presses the rear cross beam body 107 from the front upper side, so as to realize the fixation of the rear cross beam body 107, as shown in Figure 10
[0043] Specifically, as shown in Figure 5 , the first bending positioner 11 comprises a first bending upper top column 1102 and a first bending lower top column 1103, the first bending upper top column 1102 and the first bending lower top column 1103 are installed on a first bending positioning connecting plate 1102, the first bending upper top column 1102 is located at the upper rear side of the first bending lower top column 1103, the first bending positioning connecting plate 1102 is assembled on the telescopic rod of a first bending positioning air cylinder 1104, so as to fix the mounting plate which needs to be welded on one of the side main beam bodies 103 at the middle side main beam body 1032 and the rear side main beam body 1033, after fixation, the welding is facilitated.
[0044] Specifically, as shown in Figure 6 As shown, the second bending positioner 12 includes a second bending inner limit plate, a second bending push rod 1201, and a second bending positioning cylinder 1204. The second bending inner limit plate and the second bending push rod 1201 are fixedly mounted on the second bending mounting block 1205. The second bending mounting block 1205 is mounted on the second bending top block 1203. The second bending top block 1203 is assembled on the telescopic rod of the second bending positioning cylinder 1204. The second bending positioning cylinder 1204 is mounted on the second slope bracket 1206, which is used to fix the mounting plate that needs to be welded on the other side main beam body 103 at the middle side main beam body 1032 and the rear side main beam body 1033. After fixing, it is convenient for welding.
[0045] The working state of this tool during welding is as follows: Figure 7 、 Figure 8 As shown, one of the frames after welding is as follows Figure 9 The structural diagram of the vehicle frame body is shown in FIG. 1 , wherein the vehicle frame includes a front main beam body 101, a front standpipe body 102, and a side main beam body 103. The front standpipe body 102 is provided above the front main beam body 101. The lower end of the front standpipe body 102 is inserted into the standpipe lower end positioner 301, and the upper end is pressed by the standpipe upper end presser 302. The front main beam body 101 is fixed by the front main beam positioner 4. A front end cross beam body 104 is provided below the front main beam body 101. The front end cross beam body 104 is provided with side main beam bodies 103 on both sides. The side main beam body 103 includes three sections, namely the front side main beam body 1031, the middle side main beam body 1032, and the rear side main beam body 1033. The front side main beam body 1031 is located at the bottom and is approximately horizontal. It extends backward and then bends upward to form the middle side main beam body 1032. The middle side main beam body 1032 is further bent backward to form the horizontal rear side main beam body 1033. The middle front main beam body is clamped and fixed by the front main beam clamp 5 and the side main beam top block 6. The middle cross beam body 105 and the bending connecting rod body 106 are arranged between the two middle side main beam bodies 1032. The middle cross beam body 105 is supported by the first middle cross beam bracket 704 and the second middle cross beam bracket 705. The bending connecting rod body 106 is supported and positioned by the first bending connecting rod pad 7042 and the second bending connecting rod pad 7052, and then welded and installed. A rear end cross beam body 107 is provided between the beam body 1033, which needs to be fixed with a rear cross beam presser 9 and welded. The rear end of the side main beam body 103 generally needs to be installed with a shock absorber 109, so it needs to weld the shock absorber mounting frame body 109. During normal welding, manual clamping and welding are required, which is easy to tilt. A shock absorber positioning column 13 is provided on this tool to support the welding shock absorber mounting frame body 109 to achieve welding positioning and make the welding accurate.
[0046] The utility model is not limited to the implementation mode, any person should know the structural change made under the enlightenment of the utility model, any technical scheme with the same or similar utility model falls into the protection scope of the utility model.
[0047] The technical, shape and structure parts not described in detail in the utility model are well-known technologies.
Claims
1. A motorcycle frame welding fixture comprising a base frame, characterised in that: The underframe is sequentially provided with a standpipe positioning device, a front main beam positioner, a front main beam presser, a zero-point positioner, a rear main beam presser, and a rear cross beam presser, wherein a front end bracket is provided above the underframe, and the standpipe positioning device includes a standpipe lower end positioner and a standpipe upper end presser, and a front main beam positioner is provided on the rear side of the front end bracket. The left and right sides of the underframe are respectively provided with front main beam pressers and side main beam top blocks, and a zero-point positioner is provided on the left and right sides of the underframe, and a first middle cross beam bracket and a second middle cross beam bracket are provided between the two zero-point positioners. The rear end of the underframe is provided with a rear cross beam presser and a rear main beam presser, and the rear cross beam presser is installed on the rear end bracket, and the rear main beam pressers are respectively located on both sides of the rear end bracket, and a first bending positioner is provided on one side of the rear end bracket, and a second bending positioner is provided on the other side. A shock absorber positioning column is also provided on one side of the rear end bracket at the rear; The standpipe lower end positioner and the standpipe upper end presser are assembled on the oblique mounting plate, and the oblique mounting plate is fixed on the front end bracket through a bracket.
2. A motorcycle frame welding fixture according to claim 1, characterized in that: The upper end clamp of the riser is arranged at one end of the riser pressure rod, the middle part of the riser pressure rod is hinged to the riser connecting rod, the riser connecting rod is hinged to the upper end of the telescopic rod of the riser pressing cylinder, the bottom of the riser pressing cylinder is connected to the oblique mounting plate through a rotating shaft, the rear end of the riser connecting rod is hinged to the riser hinge seat, and the riser hinge seat is arranged outside the riser pressing cylinder.
3. A motorcycle frame welding fixture as claimed in claim 1, wherein: The inclined mounting plate is provided with a vertical pipe clamping assembly seat, and the vertical pipe hinge seat is installed on the vertical pipe clamping assembly seat. A connecting rod limit frame is also provided above the vertical pipe clamping assembly seat, and the connecting rod limit frame is located below the vertical pipe connecting rod. At the same time, a U-shaped groove is provided above the connecting rod limit frame, and the bottom of the vertical pipe connecting rod is stuck in the U-shaped groove of the connecting rod limit frame.
4. A motorcycle frame welding fixture as claimed in claim 1, wherein: The inclined mounting plate is further provided with a riser clamp, which is assembled on a telescopic rod of a riser clamp cylinder.
5. A motorcycle frame welding fixture as claimed in claim 1, wherein: The front main beam positioner includes a front main beam positioning needle and a front main beam positioning block. The front main beam positioning needle and the front main beam positioning block are assembled on one side of the front main beam positioning vertical plate. The front main beam positioning vertical plate is fixed to the end of the telescopic rod of the front main beam positioning cylinder.
6. A motorcycle frame welding fixture as claimed in claim 1, wherein: The front main beam tensioner is located in front of the side main beam top block, and the front main beam tensioner includes a front main beam pressure block and a front main beam cylinder. The front main beam pressure block is assembled on the front main beam pressure head, and the front main beam pressure head is arranged at the upper end of the front main beam pressure rod, and the lower end of the front main beam pressure rod is hinged to the front main beam hinge seat. The upper end of the front main beam pressure rod is hinged to one end of the front main beam connecting rod through a rotating shaft, and the other end of the front main beam connecting rod is hinged to the telescopic rod of the front main beam cylinder. The front main beam pressure block can be detachably assembled on the front main beam pressure head, and the side main beam top block is an L-shaped structure.
7. A motorcycle frame welding fixture as claimed in claim 1, wherein: The zero point locator includes a zero point top column, a limiting bracket, and a zero point cylinder. The zero point top column is arranged at the end of the telescopic rod of the zero point cylinder. The zero point locator also includes a limiting bracket. A limiting through hole is provided on the limiting bracket. The zero point top column passes through the limiting through hole and moves along the limiting through hole.
8. A motorcycle frame welding fixture as claimed in claim 1, wherein: The first intermediate cross beam bracket is arranged on the first zero point positioning frame, and the first bending connecting rod pad is arranged at the rear of the first zero point positioning frame.
9. A motorcycle frame welding fixture as claimed in claim 1, wherein: The rear cross beam presser comprises a first rear cross beam pressing block, a second rear cross beam limiting block and a rear beam pad, the rear beam pad is arranged on the rear end support, the first rear cross beam pressing block is fixed at the front end of the first rear pressing rod, the first rear pressing rod is provided with a limiting hole, the first rear limiting light shaft is arranged in the limiting hole, the first rear limiting light shaft is fixed on the rear beam pad or the rear end support, the rear end of the first rear pressing rod is hinged with the telescopic rod of the first rear cylinder, the middle part of the first rear pressing rod is hinged with the upper end of the first rear connecting rod, the lower end of the first rear connecting rod is hinged with the first rear hinge seat, the first rear hinge seat is fixed on the rear end support, the second rear cross beam limiting block is fixed on one end of the second rear pressing rod, the other end of the second rear pressing rod is hinged with the telescopic rod of the second rear cylinder, the middle part of the second rear pressing rod is hinged with the upper end of the second rear connecting rod, and the lower end of the second rear connecting rod is hinged with the second rear hinge seat.
10. A motorcycle frame welding fixture as claimed in claim 1, wherein: The first bending positioner comprises a first bending upper top column and a first bending lower top column, the first bending upper top column and the first bending lower top column are mounted on the first bending positioning connecting plate, the first bending upper top column is located at the upper rear of the first bending lower top column, and the first bending positioning connecting plate is assembled on the telescopic rod of the first bending positioning cylinder. The second bending positioner comprises a second bending inner side limiting plate, a second bending top rod and a second bending positioning cylinder, the second bending inner side limiting plate and the second bending top rod are fixedly mounted on the second bending mounting block, the second bending mounting block is mounted on the second bending top block, the second bending top block is assembled on the telescopic rod of the second bending positioning cylinder, and the second bending positioning cylinder is mounted on the second slope support.