Welding fixture for steel tube frame

Abstract

The utility model relates to the technical field of frame clamps, in particular to a welding clamp of a steel pipe frame, which comprises a bottom frame, a first transverse rod, a second transverse rod, a third transverse rod and a fourth transverse rod are sequentially arranged on the bottom frame along the length direction, two first longitudinal rods are arranged at the upper end of the first transverse rod, and first vertical rods are fixedly arranged at the upper ends of the two first longitudinal rods. Riding clamps are fixedly arranged on the first longitudinal rod and the first vertical rod; a second vertical rod is arranged at the upper end of the first transverse rod, and a first positioning plate perpendicular to the first longitudinal rod is fixedly connected to one side of the second vertical rod; a third vertical rod is arranged at the upper end of the second transverse rod, and a second positioning plate is fixedly arranged at the upper end of the third vertical rod. The main body structure of the frame can be positioned, the welding precision is improved, and the problem that the overall stress of the frame is too large due to welding errors between adjacent parts is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle frame clamps, and more specifically to a welding clamp for a steel tube vehicle frame. Background Art

[0002] The China Society of Automotive Engineers Baja Competition is a special event in the field of off-road vehicle design and testing, which has attracted the participation of many students from vehicle-related colleges and universities at home and abroad. This event is also a brand-new platform for the cultivation of skilled talents, which combines technicality and fun. It has become the most important non-educational social public platform and non-profit social welfare undertaking for countries to discover and cultivate skilled talents in the automotive industry. The China Society of Automotive Engineers Baja Competition rules have clear regulations on the competition vehicles, which must be single-seat sports racing cars. The team needs to strictly follow the relevant standards of engineering practice to complete the specific design and production work, and must meet the requirements of the Baja Competition rules for frame size.

[0003] Welding is an essential part of making a vehicle frame, and the existence of welding stress will affect the performance of the weldment, greatly reducing its bearing capacity, and even causing brittle fracture when the external load changes. Therefore, the welding stress of the Baja frame must be prevented and relieved.

[0004] A Chinese invention patent with publication number CN104439851B discloses a racing car frame welding fixture, including a platform, an inverted T-slot is provided on the platform, a horizontal 4040 aluminum profile is provided on the inverted T-slot surface of the platform, and both ends of the horizontal 4040 aluminum profile are fixedly connected to the platform through T-shaped fixing clamps; L-shaped corner plates are relatively provided on the horizontal 4040 aluminum profile, and a vertical 4040 aluminum profile is clamped between the two relatively L-shaped corner plates; an arc groove fixing clamp is provided on the vertical 4040 aluminum profile, and the arc groove fixing clamp is composed of an arc groove fixing plate and a U-bolt. When in use, the arc groove fixing clamp is used to clamp and fix the frame steel pipe.

[0005] However, the racing car in the above scheme is only suitable for the FSC Formula racing car frame and cannot be applied to the steel tube frame of the BSC Baja racing car. Utility Model Content

[0006] In order to overcome the deficiencies in the prior art, a welding fixture for a steel tube frame is provided to achieve separate fixed welding of various parts of the frame, and then overall welding is performed after the residual stress is eliminated, thereby ensuring the stability of the frame and smoothly realizing the processing and manufacturing of racing cars.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A welding fixture for a steel tube frame, comprising a base frame, wherein the base frame is provided with a first cross bar, a second cross bar, a third cross bar and a fourth cross bar in sequence along the length direction, two first longitudinal bars are provided at the upper end of the first cross bar, a first vertical bar is fixedly provided at the upper end of the two first longitudinal bars, and a saddle card is fixedly provided on the first longitudinal bar and the first vertical bar;

[0009] A second vertical rod is provided at the upper end of the first crossbar, and a first positioning plate arranged perpendicular to the first longitudinal rod is fixedly connected to one side of the second vertical rod; a third vertical rod is provided at the upper end of the second crossbar, and a second positioning plate is fixedly provided at the upper end of the third vertical rod; the second vertical rod and the third vertical rod are connected by a second longitudinal rod, and a third positioning plate is fixedly provided at the upper end of the second longitudinal rod; a clamping plate I is fixedly provided on both the left and right sides of the third crossbar; a fourth vertical rod is provided at the upper end of the fourth crossbar, and a fourth positioning plate and a fifth positioning plate are sequentially provided on the fourth vertical rod from top to bottom;

[0010] Two third longitudinal rods are arranged at the upper end of the fourth crossbar, and a fifth vertical rod, a sixth vertical rod, and a seventh vertical rod are fixedly arranged on the upper end of the third vertical rod in sequence along the length direction, the fifth vertical rod is located between the third vertical rod and the fourth vertical rod, a sixth positioning plate is arranged on the upper end of the fifth vertical rod, and a fourth longitudinal rod and a fifth longitudinal rod are arranged in sequence from top to bottom between the fifth vertical rod and the third vertical rod, two fourth longitudinal rods are arranged and a clamping plate II is fixedly connected on both sides respectively, and the fourth longitudinal rod is horizontally fixedly connected to the seventh positioning plate; the fifth longitudinal rod is fixedly connected to the eighth positioning plate;

[0011] The ninth positioning plate and the tenth positioning plate are fixedly arranged on the sixth vertical rod and the seventh vertical rod respectively; the eighth vertical rods are arranged on both sides of the base frame respectively, and the sides of the two eighth vertical rods close to each other are both provided with a clamping plate III.

[0012] Preferably, U-shaped bayonet for limiting the width of the front end rod group of the SIM is symmetrically arranged on both sides of the upper end of the first positioning plate, square bayonet for the pipe fitting to pass through is symmetrically arranged on both sides of the middle part of the first positioning plate, and inverted U-shaped bayonet for limiting the width of the front end of the LFS rod group is symmetrically arranged on both sides of the lower end of the first positioning plate, and two card plates I limit the width of the rear end of the LFS rod group;

[0013] The second positioning plate is symmetrically provided with U-shaped bayonet holes for limiting the width of the upper end of the RHO rod group on the left and right sides, and the third positioning plate is provided with U-shaped bayonet holes for limiting the width of the lower end of the RHO rod group at both ends;

[0014] The left and right sides of the fourth positioning plate are provided with U-shaped bayonet for limiting the front end width of the FAB middle rod group, and the lower sides of the ninth positioning plate are provided with U-shaped bayonet for limiting the rear end width of the FAB middle rod group;

[0015] The upper left and right sides of the fifth positioning plate are symmetrically provided with U-shaped bayonet for limiting the width of the engine support rod group, the lower left and right sides of the fifth positioning plate are symmetrically provided with U-shaped bayonet for limiting the front end width of the FAB lower end rod group, and the lower two sides of the tenth positioning plate are provided with inverted U-shaped bayonet for limiting the front end width of the FAB lower end rod group;

[0016] The upper left and right sides of the sixth positioning plate are symmetrically provided with U-shaped bayonet for limiting the upper width of the FAB upper end rod group, and the upper left and right sides of the ninth positioning plate are symmetrically provided with U-shaped bayonet for limiting the lower width of the FAB upper end rod group;

[0017] The seventh positioning plate and the eighth positioning plate are provided with U-shaped bayonet holes on both sides for controlling the tilt angle of the RRH pole;

[0018] The sixth vertical rod is provided with a riding card for limiting the position of the RLC rod group, and the seventh vertical rod is provided with a riding card for limiting the position of the rear end rod group.

[0019] Preferably, a U-shaped bayonet for supporting the fuel tank rod is provided in the middle of the ninth positioning plate.

[0020] Preferably, a rectangular hole is provided in the middle of the seventh positioning plate for the LDB rod group to pass through.

[0021] Preferably, the first cross bar, the second cross bar, the third cross bar, the fourth cross bar, the first longitudinal bar, the first vertical bar, the second vertical bar, the third vertical bar, the second longitudinal bar, the fourth vertical bar, the third vertical bar, the fifth vertical bar, the sixth vertical bar, the seventh vertical bar, the fourth longitudinal bar, the fifth longitudinal bar and the eighth vertical bar are all aluminum profiles.

[0022] Preferably, the saddle clip is connected to the corresponding aluminum profile by bolts.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] 1. The utility model can position the main structure of the frame, improve welding accuracy, and reduce the problem of excessive overall stress of the frame caused by welding errors between adjacent parts; the fixture body is made of aluminum profiles and steel plates, which is low in cost, can be used multiple times, is easy to install and disassemble, and can be stored when not in use. It has high precision, high rigidity, small deformation, and large bearing capacity.

[0025] 2. The utility model can ensure the correct relative position of each part during welding and can reduce the welding deformation of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The specific implementation of the utility model will be further described in detail below with reference to the accompanying drawings.

[0027] Figure 1 It is a structural schematic diagram of the utility model from one angle;

[0028] Figure 2 It is a structural schematic diagram of the utility model from another angle;

[0029] Figure 3 This is a structural schematic diagram of the utility model from another angle;

[0030] Figure 4 It is a schematic diagram of the steel tube frame structure;

[0031] Figure 5 It is a schematic diagram of the working state of the utility model.

[0032] In the figure: 1- chassis, 2- first crossbar, 3- second crossbar, 4- third crossbar, 5- fourth crossbar, 6- first longitudinal bar, 7- first vertical bar, 8- riding card, 9- second vertical bar, 10- first positioning plate, 11- third vertical bar, 12- second positioning plate, 13- second vertical bar, 14- third positioning plate, 15- card plate I, 16- fourth vertical bar, 17- fourth positioning plate, 18- fifth positioning plate, 19- third vertical bar, 20- fifth vertical bar, 21- sixth vertical bar, 22- seventh vertical bar, 23- sixth positioning plate, 24- fourth vertical bar, 25- fifth vertical bar, 26- sixth vertical bar, 27- seventh vertical bar, 28- eighth vertical bar, 29- eighth vertical bar, 30- eighth vertical bar, 31- eighth vertical bar, 32- eighth vertical bar, 33- eighth vertical bar, 34- eighth vertical bar, 35- eighth vertical bar, 36- eighth vertical bar, 37- eighth vertical bar, 38- eighth vertical bar, 39- eighth vertical bar, 40- eighth vertical bar, 41- eighth vertical bar, 42- eighth vertical bar, 43- eighth vertical bar, 44- eighth vertical bar, 45- eighth vertical bar, 46- eighth vertical bar, 47- eighth vertical bar, 48- eighth vertical bar, 49- eighth vertical bar, 50- fifth vertical bar, 51- eighth vertical bar, 52- eighth vertical bar, 53- eighth vertical bar, 54- eighth vertical bar, 55- eighth vertical bar, 56- eighth vertical bar, 57- eighth vertical bar, 58- eighth vertical bar, 59- eighth vertical bar, 60- eighth vertical bar, 61- eighth vertical bar, 62- eighth vertical bar, 63- eighth vertical bar, 64- eighth vertical bar, 65- eighth vertical bar 6-Cardboard II, 27-seventh positioning plate, 28-eighth positioning plate, 29-ninth positioning plate, 30-tenth positioning plate, 31-eighth vertical rod, 32-Cardboard III, 33-SIM front end rod group, 34-LFS rod group, 35-RHO rod group, 36-FAB middle rod group, 37-engine support rod group, 38-FAB lower end rod group, 39-FAB upper end rod group, 40-RRH rod, 41-fuel tank rod, 42-RLC rod group, 43-rear end rod group, 44-LDB rod group, 45-GLC rod, 46-ELC rod, 47-SIM rear end rod group. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] like Figures 1 to 5As shown, a welding fixture for a steel tube frame comprises a base frame 1, wherein the base frame 1 is sequentially provided with a first cross bar 2, a second cross bar 3, a third cross bar 4 and a fourth cross bar 5 along the length direction; two first longitudinal bars 6 are provided at the upper end of the first cross bar 2, and first vertical bars 7 are fixedly provided at the upper ends of the two first longitudinal bars 6; riding cards 8 are fixedly provided on the first longitudinal bars 6 and the first vertical bars 7, and the GLC bar and the ELC bar of the frame are positioned by the riding cards 8; a second vertical bar 9 is provided at the upper end of the first cross bar 2, and a vertical bar 7 is fixedly connected to one side of the second vertical bar 9; A first positioning plate 10 is arranged perpendicular to the first longitudinal rod 6, and U-shaped bayonet holes for limiting the width of the SIM front end rod group 33 are symmetrically arranged on both sides of the upper end of the first positioning plate 10, and square bayonet holes for pipe fittings to pass through are symmetrically arranged on both sides of the middle part of the first positioning plate 10, and the pipe fittings are temporarily supported by the square bayonet holes; inverted U-shaped bayonet holes for limiting the width of the front end of the LFS rod group 34 are symmetrically arranged on both sides of the lower end of the first positioning plate 10, and the rear end of the LFS rod group 34 is limited by the card plates Ⅰ15 fixedly arranged on the left and right sides of the third cross bar 4.

[0035] A third vertical rod 11 is provided at the upper end of the second cross bar 3, a second positioning plate 12 is fixedly provided at the upper end of the third vertical rod 11, and U-shaped bayonet for limiting the width of the upper end of the RHO rod group 35 are symmetrically provided on the left and right sides of the second positioning plate 12. The second vertical rod 9 and the third vertical rod 11 are connected by a second longitudinal rod 13, a third positioning plate 14 is fixedly provided on the upper end of the second longitudinal rod 13, and U-shaped bayonet for limiting the width of the lower end of the RHO rod group 35 are provided at both ends of the third positioning plate 14.

[0036] A fourth vertical rod 16 is arranged at the upper end of the fourth crossbar 5, and a fourth positioning plate 17 and a fifth positioning plate 18 are arranged on the fourth vertical rod 16 in sequence from top to bottom. Two third longitudinal rods 19 are arranged at the upper end of the fourth crossbar 5, and a fifth vertical rod 20, a sixth vertical rod 21, and a seventh vertical rod 22 are fixedly arranged on the upper end of the third longitudinal rod 19 in sequence along the length direction, and a ninth positioning plate 29 and a tenth positioning plate 30 are fixedly arranged on the sixth vertical rod 21 and the seventh vertical rod 22, respectively.

[0037] The fourth positioning plate 17 is provided with U-shaped bayonet on both sides to limit the front width of the FAB middle rod group 36. The rear width of the FAB middle rod group 36 is limited by the U-shaped bayonet on both sides of the lower end of the ninth positioning plate 29. The fifth positioning plate 18 is symmetrically provided with U-shaped bayonet on both sides of the lower end to limit the front width of the FAB lower rod group 38. The tenth positioning plate 30 is provided with inverted U-shaped bayonet on both sides of the lower end to limit the front width of the FAB lower rod group 38. The fifth positioning plate 18 is symmetrically provided with U-shaped bayonet on both sides of the upper end to limit the width of the engine support rod group 37.

[0038] The fifth vertical rod 20 is located between the third vertical rod 11 and the fourth vertical rod 16. A sixth positioning plate 23 is provided at the upper end of the fifth vertical rod 20. U-shaped snap-fits for limiting the upper width of the FAB upper rod group 39 are symmetrically provided on the left and right sides of the upper end of the sixth positioning plate 23. The lower width of the FAB upper rod group 39 is limited by U-shaped snap-fits symmetrically provided on the left and right sides of the upper end of the ninth positioning plate 29.

[0039] A fourth longitudinal rod 24 and a fifth longitudinal rod 25 are arranged between the fifth vertical rod 20 and the third vertical rod 11 from top to bottom. The fourth longitudinal rod 24 is horizontally fixedly connected to the seventh positioning plate 27, and the fifth longitudinal rod 25 is fixedly connected to the eighth positioning plate 28. U-shaped bayonet for controlling the inclination angle of the RRH rod 40 are correspondingly arranged on both sides of the seventh positioning plate 27 and the eighth positioning plate 28.

[0040] A rectangular hole is provided in the middle of the seventh positioning plate 27 for the LDB rod group 44 to pass through. Auxiliary rods are provided on both sides of the middle of the LDB rod group 44. Two fourth longitudinal rods 24 are provided and clamping plates II 26 are fixedly connected on both sides. The clamping plates II 26 are used to position the auxiliary rods.

[0041] Eighth vertical rods 31 are respectively arranged on both sides of the base frame 1 , and a clamping plate III 32 is arranged on each side of the two eighth vertical rods 31 close to each other, and the clamping plate III 32 supports the SIM rear end rod group 47 .

[0042] The sixth vertical rod 21 is provided with a riding card for limiting the position of the RLC rod group 42 , and the seventh vertical rod 22 is provided with a riding card for limiting the position of the rear end rod group 43 .

[0043] Preferably, a U-shaped bayonet for supporting the fuel tank rod 41 is provided in the middle of the ninth positioning plate 29 .

[0044] The first cross bar 2, the second cross bar 3, the third cross bar 4, the fourth cross bar 5, the first longitudinal bar 6, the first vertical bar 7, the second vertical bar 9, the third vertical bar 11, the second longitudinal bar 13, the fourth vertical bar 16, the third vertical bar 19, the fifth vertical bar 20, the sixth vertical bar 21, the seventh vertical bar 22, the fourth longitudinal bar 24, the fifth longitudinal bar 25, and the eighth vertical bar 31 are all aluminum profiles, and the saddle card 8 is connected to the corresponding aluminum profiles by bolts.

[0045] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. A welding fixture for a steel tube frame, characterized in that: The invention comprises a base frame (1), wherein the base frame (1) is provided with a first cross bar (2), a second cross bar (3), a third cross bar (4) and a fourth cross bar (5) in sequence along the length direction, wherein two first longitudinal bars (6) are provided at the upper end of the first cross bar (2), and a first vertical bar (7) is fixedly provided at the upper end of the two first longitudinal bars (6), and a saddle card (8) is fixedly provided on the first longitudinal bar (6) and the first vertical bar (7); A second vertical rod (9) is disposed at the upper end of the first crossbar (2), and a first positioning plate (10) disposed perpendicular to the first longitudinal rod (6) is fixedly connected to one side of the second vertical rod (9); a third vertical rod (11) is disposed at the upper end of the second crossbar (3), and a second positioning plate (12) is fixedly disposed at the upper end of the third vertical rod (11); the second vertical rod (9) and the third vertical rod (11) are connected via a second longitudinal rod (13), and a third positioning plate (14) is fixedly disposed at the upper end of the second longitudinal rod (13); a clamping plate I (15) is fixedly disposed on both left and right sides of the third crossbar (4); a fourth vertical rod (16) is disposed at the upper end of the fourth crossbar (5), and a fourth positioning plate (17) and a fifth positioning plate (18) are sequentially disposed on the fourth vertical rod (16) from top to bottom; Two third longitudinal rods (19) are arranged at the upper end of the fourth crossbar (5); a fifth vertical rod (20), a sixth vertical rod (21), and a seventh vertical rod (22) are fixedly arranged in sequence along the length direction at the upper end of the third longitudinal rod (19); the fifth vertical rod (20) is located between the third vertical rod (11) and the fourth vertical rod (16); a sixth positioning plate (23) is arranged at the upper end of the fifth vertical rod (20); a fourth longitudinal rod (24) and a fifth longitudinal rod (25) are arranged in sequence from top to bottom between the fifth vertical rod (20) and the third vertical rod (11); two fourth longitudinal rods (24) are arranged and a clamping plate II (26) is fixedly connected to both sides thereof; the fourth longitudinal rod (24) is horizontally fixedly connected to the seventh positioning plate (27); the fifth longitudinal rod (25) is fixedly connected to the eighth positioning plate (28); A ninth positioning plate (29) and a tenth positioning plate (30) are fixedly mounted on the sixth vertical rod (21) and the seventh vertical rod (22), respectively. Eighth vertical rods (31) are respectively mounted on both sides of the base frame (1), and a clamping plate III (32) is disposed on the sides of the two eighth vertical rods (31) that are close to each other.

2. The welding fixture for a steel tube frame according to claim 1, characterized in that: U-shaped snap-on openings for limiting the width of the front end rod group (33) of the SIM are symmetrically arranged on both sides of the upper end of the first positioning plate (10); square snap-on openings for allowing pipe fittings to pass through are symmetrically arranged on both sides of the middle part of the first positioning plate (10); inverted U-shaped snap-on openings for limiting the width of the front end of the LFS rod group (34) are symmetrically arranged on both sides of the lower end of the first positioning plate (10); and two snap-on plates I (15) limit the width of the rear end of the LFS rod group (34); The second positioning plate (12) is symmetrically provided with U-shaped snap-in openings for limiting the width of the upper end of the RHO rod group (35) on both sides, and the third positioning plate (14) is provided with U-shaped snap-in openings for limiting the width of the lower end of the RHO rod group (35) at both ends; The fourth positioning plate (17) is provided with U-shaped snap-in openings on the left and right sides for limiting the front end width of the FAB middle rod group (36), and the ninth positioning plate (29) is provided with U-shaped snap-in openings on the lower sides for limiting the rear end width of the FAB middle rod group (36); The fifth positioning plate (18) has U-shaped bayonet holes symmetrically arranged on the left and right sides of the upper end thereof for limiting the width of the engine support rod group (37), the fifth positioning plate (18) has U-shaped bayonet holes symmetrically arranged on the left and right sides of the lower end thereof for limiting the front end width of the FAB lower end rod group (38), and the tenth positioning plate (30) has inverted U-shaped bayonet holes symmetrically arranged on the left and right sides of the lower end thereof for limiting the front end width of the FAB lower end rod group (38); The sixth positioning plate (23) is symmetrically provided with U-shaped bayonet holes for limiting the width of the upper end of the FAB upper end rod group (39) on both sides of the upper end, and the ninth positioning plate (29) is symmetrically provided with U-shaped bayonet holes for limiting the width of the lower end of the FAB upper end rod group (39) on both sides of the upper end; U-shaped bayonet holes for controlling the tilt angle of the RRH rod (40) are correspondingly arranged on both sides of the seventh positioning plate (27) and the eighth positioning plate (28); The sixth vertical rod (21) is provided with a riding card for limiting the position of the RLC rod group (42), and the seventh vertical rod (22) is provided with a riding card for limiting the position of the rear end rod group (43).

3. The welding fixture for a steel tube frame according to claim 1, characterized in that: A U-shaped bayonet for supporting the oil tank rod (41) is provided in the middle of the ninth positioning plate (29).

4. The welding fixture for a steel tube frame according to claim 1, characterized in that: A rectangular hole is provided in the middle of the seventh positioning plate (27) for the LDB rod group (44) to pass through.

5. The welding fixture for a steel tube frame according to claim 1, characterized in that: The first crossbar (2), the second crossbar (3), the third crossbar (4), the fourth crossbar (5), the first longitudinal bar (6), the first vertical bar (7), the second vertical bar (9), the third vertical bar (11), the second longitudinal bar (13), the fourth vertical bar (16), the third vertical bar (19), the fifth vertical bar (20), the sixth vertical bar (21), the seventh vertical bar (22), the fourth vertical bar (24), the fifth vertical bar (25), and the eighth vertical bar (31) are all made of aluminum profiles.

6. The welding fixture for a steel tube frame according to claim 5, characterized in that: The riding card (8) is connected to the corresponding aluminum profile by bolts.

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