A welding and straightening tool for chassis side beams

Abstract

The present application relates to a welding straightening tool for chassis side beams, which relates to the technical field of rail vehicles, and includes: a placement mechanism, at least two groups of hoisting mechanisms, a processing mechanism and a straightening mechanism; the hoisting mechanisms are respectively arranged on both sides of the placement mechanism, and are used to hoist channel steels; the processing mechanism is arranged on one side of the placement mechanism, and is parallel to the placement mechanism; the straightening mechanism is arranged on one side of the processing mechanism; the placement mechanism includes a plurality of bottom beams, and a plurality of bottom beam arrays are arranged, and the bottom beams are used to place channel steels; the processing mechanism includes a plurality of supporting beams and a positioning fixture; a plurality of supporting beam arrays are arranged on one side of the bottom beam, and the height of the supporting beams is higher than the height of the bottom beam; the positioning fixture is arranged between adjacent supporting beams, and is used to clamp and position the channel steels. The present application completes the transportation of the channel steels through the hoisting mechanism, straightens the channel steels through the straightening mechanism, and finally clamps them for welding. The entire tooling structure is compact, which reduces the difficulty of processing and improves the processing efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of rail vehicles, and in particular to a welding and straightening tool for chassis side beams. Background Art

[0002] Rail transit is one of the most important modes of transportation in my country. The existing railway freight cars in China are mainly: flat cars, open cars, and covered cars. The chassis side beam of a railway vehicle is an important component of a railway vehicle. The chassis side beam is welded from two channel steels to form a long straight beam structure with strict straightness requirements.

[0003] Channel steel is a long steel strip with a groove-shaped cross section. It is a carbon structural steel for construction and machinery. It is a steel section with a complex cross section. Its cross section is groove-shaped. Channel steel is widely used in vehicle manufacturing and other fields because of its good welding, riveting and comprehensive mechanical properties.

[0004] Since the channel steel used in practice has curvature under stress, and there is no specific tooling in the prior art to straighten the channel steel before welding, repeated welding and correction will occur during the subsequent welding process. The heat from welding will cause deformation and require straightening, which makes the processing difficult, resulting in poor quality of the finished welded product and greatly reduces efficiency. Utility Model Content

[0005] In order to solve the problem that the channel steel has curvature before welding, resulting in poor welding effect, the present application provides a chassis side beam welding straightening tool.

[0006] The chassis side beam welding straightening tool provided in this application adopts the following technical solution:

[0007] A welding straightening tool for a chassis side beam comprises: a placement mechanism, at least two groups of hoisting mechanisms, a processing mechanism and a straightening mechanism; the hoisting mechanisms are respectively arranged on both sides of the placement mechanism for hoisting channel steels; the processing mechanism is arranged on one side of the placement mechanism and is parallel to the placement mechanism; the straightening mechanism is arranged on one side of the processing mechanism; the placement mechanism comprises a plurality of bottom beams, which are arranged in an array and are used to place channel steels; the processing mechanism comprises a plurality of supporting beams and a positioning fixture; an array of the supporting beams is arranged on one side of the bottom beam, and the height of the supporting beams is higher than that of the bottom beam; the positioning fixture is arranged between adjacent supporting beams for clamping and positioning the channel steels.

[0008] By adopting the above technical solution, the bottom beam is used to place the channel steel, which not only improves the stability of the channel steel, but also provides a placement position for the next channel steel to be processed, thereby improving the compactness between processes and improving efficiency. The channel steel can be hoisted by a hoisting mechanism, which makes it convenient to lift the channel steel and provide convenience for subsequent straightening and welding. The processing mechanism can be used to conveniently and quickly perform preliminary calibration and straightening of the channel steel, thereby improving the straightness of the channel steel. The straightening mechanism can be used to further correct and straighten the channel steel before welding, thereby avoiding the need for multiple corrections and straightening of the channel steel during the welding process, thereby reducing the difficulty of operation and improving efficiency.

[0009] In a specific possible implementation scheme, the lifting mechanism includes a lifting frame, a lifting drive and a grabbing assembly; the lifting frame is mounted on both sides of the plurality of bottom beams; the lifting drive is transmission-arranged on the lifting frame; and the grabbing assembly is connected to the lifting drive.

[0010] By adopting the above technical solution and using the lifting drive to drive the grabbing assembly, the grabbing assembly can stably, quickly and conveniently grab the channel steel, and transport the channel steel from the placement mechanism to the processing mechanism, thereby improving the convenience of moving the channel steel.

[0011] In a specific possible implementation scheme, the gripping assembly includes a vertical drive, a transverse drive and a clamp, wherein the vertical drive is slidably disposed on the hoisting drive member; the transverse drive is slidably disposed on the vertical drive; and the clamp is slidably disposed on the transverse drive.

[0012] By adopting the above technical solution, the clamp is slidably set on the horizontal driver, the horizontal driver is slidably set on the vertical driver, and the vertical driver is slidably set on the lifting drive component. The clamp can be driven to slide in multiple directions to grab the channel steel from multiple directions, thereby improving the convenience and reliability of grabbing.

[0013] In a specific feasible implementation scheme, the clamp includes a first clamp and a second clamp, and the transverse drive includes a transverse motor and a transverse screw; the transverse motor is arranged on the vertical drive, and the transverse screw is connected to the transverse motor; the first clamp and the second clamp are respectively threadedly connected to the two ends of the transverse screw; the threads at the two ends of the transverse screw have opposite rotation directions; a clamping space is formed between the first clamp and the second clamp; the clamping space is used to clamp and wrap the channel steel.

[0014] By adopting the above technical solution, the first clamping jaw and the second clamping jaw can clamp the channel steel from the side and bottom surface of the channel steel, thereby ensuring the stability and reliability of clamping the channel steel.

[0015] In a specific possible implementation scheme, the first clamping jaw and the second clamping jaw each include a vertical clamping portion and a transverse clamping portion; the vertical clamping portion is slidably arranged at the end of the transverse screw; the transverse clamping portion is arranged at the bottom end of the vertical clamping portion; the top surfaces of the transverse clamping portions of the first clamping jaw and the second clamping jaw are both inclined downward and arranged opposite to each other.

[0016] By adopting the above technical solution, the tops of the transverse clamping parts of the first clamping jaw and the second clamping jaw are tilted downward and arranged relatively to each other, which can facilitate the transverse clamping parts of the first clamping jaw and the second clamping jaw to extend into the bottom of the channel steel, thereby improving the convenience of clamping.

[0017] In a specific feasible implementation scheme, the positioning fixture includes: a fixed seat, a first hinge, a second hinge, a first clamping block, a second clamping block, a clamping cylinder and a movable sleeve; the fixed seat is fixedly arranged between adjacent supporting beams, and the middle positions of the first hinge and the second hinge are respectively hinged to the two sides of the fixed seat; the bottoms of the first hinge and the second hinge are bent and extended to the bottom of the fixed seat, and are connected through the clamping cylinder; the middle positions of the first hinge and the second hinge extend toward the middle position of the fixed seat, and are hinged to the movable sleeve; the movable sleeve is slidably connected in the fixed seat, and moves up and down in the fixed seat; the tops of the first hinge and the second hinge are respectively connected to the first clamping block and the second clamping block; the first clamping block and the second clamping block are relatively and slidably arranged on the top of the fixed seat.

[0018] By adopting the above technical solution and utilizing this arrangement, the first clamping block and the second clamping block at both ends of the fixed seat can be driven to move simultaneously by the clamping cylinder, so that the channel steel can be clamped from both ends at the same time, thereby improving the convenience of operation and the reliability of clamping.

[0019] In a specific feasible implementation scheme, a sliding groove and a positioning groove are provided on the top of the fixed seat, and the first clamping block and the second clamping block are slidably arranged in the sliding groove; the positioning groove is arranged between the two sliding grooves and perpendicular to the sliding groove, and the positioning groove is used to place the channel steel.

[0020] By adopting the above technical solution, the sliding groove is used to limit the movement trajectory of the first clamping block and the second clamping block, thereby improving the reliability of the movement of the first clamping block and the second clamping block. The positioning groove can be used to limit and position the channel steel, thereby improving the consistency of the placement position of the channel steel and the reliability of straightening.

[0021] In a specific feasible implementation scheme, the positioning clamp includes a fixed base, a positioning clamp rod, a movable clamp rod and a vertical plate; the positioning clamp rod is fixedly arranged on the fixed base, and a positioning clamp block is arranged at one end of the positioning clamp rod; the vertical plate is fixedly arranged on the fixed base, and the movable clamp rod is slidably arranged on the vertical plate, a movable clamp block is arranged at one end, and the other end is fixed to the vertical plate by a nut; the positioning clamp block and the movable clamp block are arranged opposite to each other, and a positioning clamping space is formed between the positioning clamp block and the movable clamp block.

[0022] By adopting the above technical solution, this setting can be used to adjust the position of the moving clamp rod on the vertical plate by adjusting the moving nut, thereby adjusting the position of the moving clamp block, so as to be able to adjust the distance between the moving clamp block and the positioning clamp block, thereby improving the convenience of channel steel clamping adjustment and ensuring the stability of the clamped channel steel.

[0023] In a specific possible implementation scheme, the straightening mechanism includes a straightening frame, a straightening drive, a heater and a cooler; the bottom beam is arranged on one side of the supporting beam; the straightening drive is arranged on the straightening frame; the heater and the cooler are both slidably arranged on the straightening drive.

[0024] By adopting the above technical solution, the heater and the cooler are both slidably set on the straightening drive, so that the positions of the heater and the cooler can be flexibly adjusted, so that the channel steel can be straightened conveniently, the straightness of the channel steel is improved, and the straightening efficiency is improved.

[0025] In a specific possible implementation manner, the straightening drive is a three-axis manipulator.

[0026] By adopting the above technical solution and using the straightening drive as a three-axis manipulator, the heater and the cooler can be driven to move in multiple directions, thereby improving the flexibility of operation and the overall efficiency.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The placement mechanism can stably place the channel steel and provide a placement position for the next channel steel to be processed, which improves the compactness between processes and improves efficiency;

[0029] 2. The hoisting mechanism can stably and conveniently lift the channel steel, which improves the convenience and stability of moving the channel steel;

[0030] 3. The processing mechanism can be used to conveniently and quickly perform preliminary calibration and straightening of the channel steel, thereby improving the straightness of the channel steel and improving the efficiency and effect of straightening;

[0031] 4. The straightening mechanism can be used to further correct and straighten the channel steel before welding, avoiding the need for multiple corrections and straightening of the channel steel during the welding process, reducing the difficulty of operation and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of an embodiment of the present application.

[0033] Figure 2 It is a schematic diagram of a lifting mechanism in one embodiment of the present application.

[0034] Figure 3 It is a schematic diagram of a processing mechanism and a straightening mechanism in one embodiment of the present application.

[0035] Figure 4 This is a schematic diagram of a positioning fixture in one embodiment of the present application.

[0036] Figure 5 It is a cross-sectional view of a positioning fixture in one embodiment of the present application.

[0037] Figure 6 This is a schematic diagram of another positioning fixture in an embodiment of the present application.

[0038] Description of reference numerals: 1. placing mechanism; 11. bottom beam; 2. hoisting mechanism; 21. hoisting frame; 22. hoisting drive member; 23. grab assembly; 231. vertical drive; 232. horizontal drive; 233. clamping jaw; 234. first clamping jaw; 235. second clamping jaw; 236. horizontal motor; 237. horizontal screw; 238. vertical clamping portion; 239. horizontal clamping portion; 3. processing mechanism; 4. supporting beam; 5. positioning fixture; 51. Fixed seat; 52. First hinge; 53. Second hinge; 54. First clamping block; 55. Second clamping block; 56. Clamping cylinder; 57. Moving sleeve; 58. Sliding groove; 59. Positioning groove; 61. Fixed base; 62. Positioning clamping rod; 63. Moving clamping rod; 64. Vertical plate; 65. Positioning clamping block; 66. Moving clamping block; 7. Straightening mechanism; 71. Straightening frame; 72. Straightening drive; 73. Heater; 74. Cooler. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-6 The present application is further described in detail. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0040] In this application, unless otherwise stated, the directions or positional relationships indicated by the directional words such as "longitudinal, transverse" are based on the directions or positional relationships of the length of the bottom beam of this application. Among them, the directional word "transverse" refers to the length direction of the bottom beam of this application. The description of the directions or positional relationships of the pipeline carrier and its components of this application is consistent with the installation directions in actual use.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0043] An embodiment of the chassis side beam welding straightening tool of the present application is as follows: Figure 1 As shown, it includes: a placement mechanism 1, at least two sets of lifting mechanisms 2, a processing mechanism 3 and a straightening mechanism 7. The placement mechanism 1 includes a plurality of bottom beams 11, and the plurality of bottom beams 11 are arranged in an array, that is, the plurality of bottom beams 11 are parallel to each other and arranged at intervals to form a long skeleton structure; two channel steels are placed on one side of the plurality of bottom beams 11, and the notches of the two channel steels are arranged oppositely.

[0044] like Figure 1 , 2 As shown, the hoisting mechanism 2 is respectively arranged on both sides of the placement mechanism 1 for hoisting the channel steel. The hoisting mechanism 2 includes a hoisting frame 21, a hoisting drive 22 and a grab assembly 23. The hoisting frame 21 is set on the outside of a plurality of bottom beams 11 and arranged in the transverse direction. The hoisting drive 22 is arranged on the hoisting frame 21 and can be transmitted in the transverse direction. The grab assembly 23 is connected to the bottom of the hoisting drive 22.

[0045] The grab assembly 23 includes a vertical driver 231, a transverse driver 232 and a clamp 233. The vertical driver 231 is slidably disposed on the hoisting driver 22 and can move vertically. The transverse driver 232 is slidably disposed on the vertical driver 231 and can move transversely. The clamp 233 is slidably disposed on the transverse driver 232, so that the transverse position of the clamp 233 can be adjusted more accurately.

[0046] The clamping jaw 233 includes a first clamping jaw 234 and a second clamping jaw 235, and the transverse driver 232 includes a transverse motor 236 and a transverse screw 237; the transverse motor 236 is connected to the vertical driver 231, and the transverse screw 237 is connected to the transverse motor; the first clamping jaw 234 and the second clamping jaw 235 are respectively threadedly connected to the two ends of the transverse screw 237, and the threads at the two ends of the transverse screw 237 are in opposite directions. A clamping space is formed between the first clamping jaw 234 and the second clamping jaw 235, and the clamping space is used to clamp and wrap the channel steel.

[0047] The first clamping jaw 234 and the second clamping jaw 235 each include a vertical clamping portion 238 and a transverse clamping portion 239; the vertical clamping portion 238 is threadedly connected to the transverse screw 237, and the transverse clamping portion 239 is disposed at the bottom end of the vertical clamping portion 238. The tops of the transverse clamping portions 239 of the first clamping jaw 234 and the second clamping jaw 235 are tilted downward and disposed opposite to each other.

[0048] The operator turns on the hoisting drive 22, the vertical drive 231, and the transverse drive 232. The first clamp 234 and the second clamp 235 are moved to the top of the channel steel under the drive of the hoisting drive 22, and move vertically toward the channel steel under the drive of the vertical drive 231. Finally, the transverse drive 232 moves from the side toward the channel steel, lifts the channel steel from the bottom, and transports it to the processing mechanism 3.

[0049] like Figure 1 , 3 As shown, the processing mechanism 3 is arranged on one side of the placement mechanism 1 and is parallel to the placement mechanism 1. The processing mechanism 3 includes a plurality of supporting beams 4 and a positioning fixture 5. The plurality of supporting beams 4 are arranged in an array on one side of the bottom beam 11, and the height of the supporting beams 4 is higher than the height of the bottom beam 11; the positioning fixture 5 is arranged between adjacent supporting beams 4 and is used to clamp and position the channel steel.

[0050] like Figure 4 , 5As shown, the positioning fixture 5 includes: a fixed seat 51, a first hinge 52, a second hinge 53, a first clamping block 54, a second clamping block 55, a clamping cylinder 56 and a movable sleeve 57. The fixed seat 51 is fixedly arranged between adjacent supporting beams 4, and the middle position of the first hinge 52 and the second hinge 53 is respectively hinged to the two sides of the fixed seat 51. The bottoms of the first hinge 52 and the second hinge 53 are bent and extended to the bottom of the fixed seat 51, and are connected through the clamping cylinder 56, that is, one end of the clamping cylinder 56 is hinged to the bottom of the second hinge 53, and the telescopic rod at the other end is hinged to the bottom end of the first hinge 52. The middle position of the first hinge 52 and the second hinge 53 extends to the inside of the fixed seat 51 and is hinged to the movable sleeve 57. The movable sleeve 57 is slidably connected in the fixed seat 51 and slides up and down on the fixed rod in the fixed seat 51. The tops of the first hinge 52 and the second hinge 53 are connected to the first clamping block 54 and the second clamping block 55 respectively; the first clamping block 54 and the second clamping block 55 are slidably disposed on the top of the fixing seat 51 opposite to each other.

[0051] Specifically, a sliding groove 58 and a positioning groove 59 are provided on the top of the fixing seat 51, and the first clamping block 54 and the second clamping block 55 are slidably arranged in the sliding groove 58. The positioning groove 59 is arranged between the two sliding grooves 58 and is arranged perpendicular to the sliding groove 58, and the channel steel is placed in the positioning groove 59.

[0052] The clamping cylinder 56 is started, and the clamping cylinder 56 pushes the first hinge 52 and the second hinge 53 to rotate around the point of hinge with the fixed seat 51, that is, the bottom of the first hinge 52 moves to the outside of the fixed seat 51, the middle position of the first hinge 52 rotates, and drives the moving sleeve 57 to slide downward on the fixed rod, and the top of the first hinge 52 moves to the inside of the fixed seat 51. The moving track of the second hinge 53 is set in a mirror image with the moving track of the first hinge 52. The first clamping block 54 and the second clamping block 55 slide in the sliding groove 58 under the drive of the first hinge 52 and the second hinge 53, and approach each other, thereby clamping the channel steel placed in the positioning groove 59.

[0053] In addition, the positioning fixture 5 can also be in the following structural form, such as Figure 6As shown, the positioning fixture 5 includes a fixed base 61, a positioning clamp rod 62, a movable clamp rod 63, a vertical plate 64, a positioning clamp block 65 and a movable clamp block 66. The positioning clamp rod 62 is fixedly arranged on the fixed base 61, and a positioning clamp block 65 is arranged at one end of the positioning clamp rod 62. The vertical plate 64 is fixedly arranged on the fixed base 61, and the movable clamp rod 63 is slidably arranged on the vertical plate 64, and a movable clamp block 66 is arranged at one end, and the other end is fixed to the vertical plate by a nut. The positioning clamp block 65 and the movable clamp block 66 are arranged opposite to each other, and a positioning clamping space is formed between the positioning clamp block 65 and the movable clamp block 66. In this embodiment, the movable clamp rod 63 adopts a screw structure.

[0054] By adjusting the nut, the position of the movable clamp rod 63 on the vertical plate 64 is adjusted, and the movable clamp plate slides and approaches the positioning clamp rod 62, that is, the movable clamp block 66 approaches the fixed clamp block to clamp the channel steel in the positioning clamping space.

[0055] like Figure 1 , 3 As shown, the straightening mechanism 7 is arranged on one side of the processing mechanism 3. The straightening mechanism 7 includes a straightening frame 71, a straightening driver 72, a heater 73 and a cooler 74. The bottom beam is arranged on one side of the supporting cross beam 4, the straightening driver 72 is arranged on the straightening frame 71, and the heater 73 and the cooler 74 are both slidably arranged on the straightening driver 72. Specifically, the straightening driver 72 is a three-axis manipulator. The heater 73 is specifically a plurality of oxygen acetylene nozzles, and the cooler 74 is a plurality of tap water nozzles.

[0056] The straightening driver 72 is turned on to drive the heater 73 and the cooler 74 to move to the corresponding positions of the channel steel. The bent part of the channel steel is first heated with oxygen and acetylene, and then watered and shrunk by a tap water nozzle to straighten the channel steel.

[0057] The implementation principle of the chassis side beam welding straightening tooling of this embodiment is: after the processing of the channel steel on the processing mechanism 3 is completed and cleared, the two channel steels on the placing mechanism 1 are moved and placed on the supporting beam 4 through the lifting mechanism 2 for preliminary straightening, and then the channel steel is further straightened by the heater 73 and the cooler 74 sliding on the straightening driver 72, and then tested and further corrected by an artificial hydraulic level, and finally the positioning fixture 5 clamps and positions the channel steel to complete the welding.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A welding straightening tool for chassis side beams, characterized in that: include: A placement mechanism (1), at least two groups of lifting mechanisms (2), a processing mechanism (3) and a straightening mechanism (7); the lifting mechanisms (2) are respectively arranged on both sides of the placement mechanism (1) and are used to lift the channel steel; the processing mechanism (3) is arranged on one side of the placement mechanism (1) and is parallel to the placement mechanism (1); the straightening mechanism (7) is arranged on one side of the processing mechanism (3); The placement mechanism (1) comprises a plurality of bottom beams (11), the plurality of bottom beams (11) are arranged in an array, and the bottom beams (11) are used to place channel steels; The processing mechanism (3) comprises a plurality of supporting beams (4) and a positioning fixture (5); the plurality of supporting beams (4) are arranged in an array on one side of the bottom beam (11), and the height of the supporting beams (4) is higher than the height of the bottom beam (11); the positioning fixture (5) is arranged between adjacent supporting beams (4) and is used to clamp and position the channel steel.

2. The underframe side beam welding straightening tool according to claim 1, characterized in that: The hoisting mechanism (2) comprises a hoisting frame (21), a hoisting drive component (22) and a grabbing assembly (23); the hoisting frame (21) is mounted on both sides of a plurality of bottom beams (11); the hoisting drive component (22) is transmission-arranged on the hoisting frame (21); and the grabbing assembly (23) is connected to the hoisting drive component (22).

3. The underframe side beam welding straightening tool according to claim 2 is characterized in that: The gripping assembly (23) comprises a vertical drive (231), a transverse drive (232) and a clamp (233), wherein the vertical drive (231) is slidably arranged on the hoisting drive member (22); the transverse drive (232) is slidably arranged on the vertical drive (231); and the clamp (233) is slidably arranged on the transverse drive (232).

4. The underframe side beam welding straightening tool according to claim 3 is characterized in that: The clamping jaw (233) comprises a first clamping jaw (234) and a second clamping jaw (235), and the transverse driver (232) comprises a transverse motor (236) and a transverse screw (237); the transverse motor (236) is arranged on the vertical driver (231), and the transverse screw (237) is connected to the transverse motor (236); the first clamping jaw (234) and the second clamping jaw (235) are respectively threadedly connected to the two ends of the transverse screw (237); the threads at the two ends of the transverse screw (237) have opposite rotation directions; a clamping space is formed between the first clamping jaw (234) and the second clamping jaw (235); the clamping space is used to clamp and wrap the channel steel.

5. The underframe side beam welding straightening tool according to claim 4, characterized in that: The first clamping jaw (234) and the second clamping jaw (235) both include a vertical clamping portion (238) and a transverse clamping portion (239); the vertical clamping portion (238) is slidably arranged at the end of the transverse screw rod (237); the transverse clamping portion (239) is arranged at the bottom end of the vertical clamping portion (238); the top surfaces of the transverse clamping portions (239) of the first clamping jaw (234) and the second clamping jaw (235) are both inclined downward and arranged opposite to each other.

6. The underframe side beam welding straightening tool according to claim 1, characterized in that: The positioning fixture (5) comprises: a fixed seat (51), a first hinge (52), a second hinge (53), a first clamping block (54), a second clamping block (55), a clamping cylinder (56) and a movable sleeve (57); the fixed seat (51) is fixedly arranged between adjacent supporting beams (4); the middle positions of the first hinge (52) and the second hinge (53) are respectively hinged to the two sides of the fixed seat (51); the bottoms of the first hinge (52) and the second hinge (53) are both bent and extended to the bottom of the fixed seat (51), and are moved by the clamping cylinder (56) ) are connected; the middle positions of the first hinge (52) and the second hinge (53) extend toward the middle position of the fixed seat (51) and are hinged to the movable sleeve (57); the movable sleeve (57) is slidably connected in the fixed seat (51) and moves up and down in the fixed seat (51); the tops of the first hinge (52) and the second hinge (53) are respectively connected to the first clamping block (54) and the second clamping block (55); the first clamping block (54) and the second clamping block (55) are relatively and slidably arranged on the top of the fixed seat (51).

7. The underframe side beam welding straightening tool according to claim 6, characterized in that: A sliding groove (58) and a positioning groove (59) are arranged on the top of the fixing seat (51), and the first clamping block (54) and the second clamping block (55) are slidably arranged in the sliding groove (58); the positioning groove (59) is arranged between the two sliding grooves (58) and is arranged perpendicular to the sliding groove (58), and the positioning groove (59) is used to place the channel steel.

8. The underframe side beam welding and straightening tool according to claim 1, characterized in that: The positioning clamp (5) comprises a fixed base (61), a positioning clamp rod (62), a movable clamp rod (63) and a vertical plate (64); the positioning clamp rod (62) is fixedly arranged on the fixed base (61), and a positioning clamp block (65) is arranged at one end of the positioning clamp rod (62); the vertical plate (64) is fixedly arranged on the fixed base (61), and the movable clamp rod (63) is slidably arranged on the vertical plate (64), one end of which is provided with a movable clamp block (66), and the other end is fixed to the vertical plate (64) by a nut; the positioning clamp block (65) and the movable clamp block (66) are arranged opposite to each other, and a positioning clamping space is formed between the positioning clamp block (65) and the movable clamp block (66).

9. The underframe side beam welding straightening tool according to claim 1, characterized in that: The straightening mechanism (7) comprises a straightening frame (71), a straightening drive (72), a heater (73) and a cooler (74); the bottom beam (11) is arranged on one side of the supporting cross beam (4); the straightening drive (72) is arranged on the straightening frame (71); and the heater (73) and the cooler (74) are both slidably arranged on the straightening drive (72).

10. The underframe side beam welding straightening tool according to claim 9, characterized in that: The straightening driver (72) is a three-axis manipulator.

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