Vehicle frame assembly welding tool and vehicle frame assembly welding method

Abstract

The present disclosure relates to the field of commercial vehicle production and manufacturing, and specifically, to a frame assembly welding tool and a frame assembly welding method. The frame assembly welding tool disclosed in the present disclosure includes: a bottom plate, a middle cross beam fixing mechanism, a rear longitudinal beam fixing mechanism, a lower gantry beam fixing mechanism and a front longitudinal beam fixing mechanism, all of which are arranged on the bottom plate and are used to fix the middle cross beam, the rear longitudinal beam, the lower gantry beam and the front longitudinal beam respectively. After the middle cross beam, the rear longitudinal beam, the lower gantry beam and the front longitudinal beam are fixed to the frame assembly welding tool disclosed in the present disclosure, there is a first welding gap between the rear longitudinal beam and the middle cross beam, a second welding gap between the lower gantry beam and the rear longitudinal beam, and a third welding gap between the front longitudinal beam and the lower gantry beam. The frame assembly welding tool disclosed in the present disclosure can reduce the deformation after welding when welding a large frame assembly, improve the quality of the frame, and can first perform fine processing of the frame subassembly and then weld the frame, saving costs.

Description

Technical Field

[0001] The present disclosure relates to the field of commercial vehicle production and manufacturing, and in particular, to a frame assembly welding tool and a frame assembly welding method. Background Art

[0002] The frame assembly generally includes sub-assemblies such as the main beam, longitudinal beam, gantry beam, middle cross beam and tail cross beam, which are assembled into one by welding. For large-scale mining dump trucks, the frame assembly is a key load-bearing component. Its upper end is connected to the cargo box and its lower end is connected to the running device. The overall assembly size requirements are high, the operating conditions are complex, and it needs to withstand strong dynamic and static load impacts. Therefore, the welding quality requirements of the weld are high. In the prior art, when welding the frame assembly, especially when welding large frame assemblies such as dump truck frame assemblies, the deformation after welding is large, which affects the quality of the frame and the quality of the weld. In order to control the deformation after welding, it is generally adopted to weld the sub-assemblies after rough processing first, and then put the frame assembly as a whole into the CNC machining center for drilling, milling planes and other processing to ensure the accuracy of these structural dimensions and positions. However, when facing large frame assemblies, this method requires a large CNC machining center and is very costly.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] The purpose of the present disclosure is to provide a frame assembly welding tool and a frame assembly welding method, which can reduce the deformation after welding when welding a large frame assembly, improve the quality of the frame, and can first perform fine processing on the frame subassembly and then weld the frame, thereby saving costs.

[0005] According to one aspect of the present disclosure, a frame assembly welding tool is provided for welding a frame, and the frame assembly welding tool comprises:

[0006] Base plate;

[0007] A middle crossbeam fixing mechanism is arranged on the bottom plate, and the middle crossbeam fixing mechanism is used to fix the middle crossbeam of the frame;

[0008] A rear longitudinal beam fixing mechanism is arranged on the bottom plate, and is used to fix the rear longitudinal beam of the frame, and to provide a first welding gap between the rear longitudinal beam and the middle cross beam on the middle cross beam fixing mechanism;

[0009] A lower gantry beam fixing mechanism is provided on the bottom plate, and is used to fix the lower gantry beam of the frame, and to provide a second welding gap between the lower gantry beam and the rear longitudinal beam on the rear longitudinal beam fixing mechanism;

[0010] The front longitudinal beam fixing mechanism is arranged on the bottom plate and is used to fix the front longitudinal beam of the frame and to provide a third welding gap between the front longitudinal beam and the lower gantry beam on the lower gantry beam fixing mechanism.

[0011] According to another aspect of the present disclosure, a frame assembly welding method is provided, the frame assembly welding method is used for welding a frame, and the method comprises:

[0012] Install the middle cross beam of the frame to the middle cross beam fixing mechanism on the bottom plate;

[0013] Installing the rear longitudinal beam of the frame to the rear longitudinal beam fixing mechanism on the bottom plate so that a first welding gap exists between the rear longitudinal beam and the middle cross beam on the middle cross beam fixing mechanism;

[0014] Installing the lower gantry beam of the vehicle frame to the lower gantry beam fixing mechanism on the bottom plate so that a second welding gap exists between the lower gantry beam and the rear longitudinal beam on the rear longitudinal beam fixing mechanism;

[0015] Installing the front longitudinal beam of the vehicle frame to the front longitudinal beam fixing mechanism on the bottom plate so that a third welding gap exists between the front longitudinal beam and the lower gantry beam on the lower gantry beam fixing mechanism;

[0016] The middle cross beam and the rear longitudinal beam are welded together to fill the first welding gap, the rear longitudinal beam and the lower gantry beam are welded together to fill the second welding gap, and the front longitudinal beam and the lower gantry beam are welded together to fill the third welding gap;

[0017] The welds formed after the first welding gap, the second welding gap and the third welding gap are filled and welded are insulated.

[0018] The frame assembly welding fixture disclosed in the present invention can fix the position of the main sub-assembly of the frame when welding the frame assembly, especially a large frame assembly such as a dump truck frame assembly, and make it have a first welding gap, a second welding gap and a third welding gap, thereby improving the assembly dimensional accuracy of the frame, reducing deformation after welding, and improving the quality of the frame. In addition, since the dimensional accuracy is guaranteed, the frame sub-assembly can be fine-machined first, and then the frame can be welded, so that the entire frame assembly does not need to be placed in a large CNC machining center, saving costs. At the same time, the frame assembly welding fixture disclosed in the present invention fixes the sub-assembly of the frame in a position that is conducive to welding processing, reduces the difficulty of welding, and can improve the quality level of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0020] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. Among them:

[0021] Figure 1 A schematic diagram of the structure of a frame assembly welding tool according to an exemplary embodiment of the present disclosure when used for welding a frame is shown;

[0022] Figure 2 A schematic structural diagram of a vehicle frame assembly welding tool according to an exemplary embodiment of the present disclosure is shown;

[0023] Figure 3 A schematic diagram of the structure of a vehicle frame when a vehicle frame assembly welding tool is used to weld a vehicle frame according to an exemplary embodiment of the present disclosure is shown;

[0024] Figure 4 A flow chart of a vehicle frame assembly welding method according to an exemplary embodiment of the present disclosure is schematically shown.

[0025] The following are the descriptions of the reference numerals:

[0026] 1. Middle cross beam; 2. Rear longitudinal beam; 3. Lower gantry beam; 4. Front longitudinal beam; 5. Main beam; 6. Rear cross beam; 7. Upper gantry beam;

[0027] 10. Bottom plate; 21. Middle cross beam fixing mechanism; 211. First positioning pin; 212. Middle cross beam positioning seat; 213. First clamping block; 214. First clamping mechanism; 215. First adjustment mechanism; 22. Rear longitudinal beam fixing mechanism; 221. Rear longitudinal beam supporting device; 222. Second adjustment mechanism; 223. Third adjustment mechanism; 224. Second clamping mechanism; 23. Lower gantry beam fixing mechanism; 231. Second positioning pin; 232. Third positioning pin; 233. Lower gantry beam positioning seat; 24. Front longitudinal beam fixing mechanism; 241. Front longitudinal beam supporting device 242, fourth adjustment mechanism; 243, third clamping mechanism; 25, main beam fixing mechanism; 251, main beam supporting device; 252, fifth adjustment mechanism; 26, tail beam fixing mechanism; 261, fourth positioning pin; 262, fifth positioning pin; 263, tail beam positioning seat; 264, second clamping block; 265, fourth clamping mechanism; 27, upper gantry beam fixing mechanism; 271, sixth positioning pin; 272, upper gantry beam positioning seat; 273, third clamping block; 274, fifth clamping mechanism; 28, support reinforcement mechanism; 29, auxiliary mechanism;

[0028] 101, first welding gap; 102, second welding gap; 103, third welding gap; 104, fourth welding gap; 105, fifth welding gap; 106, sixth welding gap. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0030] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0031] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the example embodiments of the present disclosure are only for convenience, for example, they are described according to the angles shown in the accompanying drawings, and should not be understood as limiting the example embodiments of the present disclosure. It should also be understood that in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", or "inner", "outer", but also indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element. The terms "first" and "second" and the like are used only as markers and are not quantitative restrictions on their objects.

[0032] The frame assembly generally includes sub-assemblies such as the main beam, longitudinal beam, gantry beam, middle cross beam and tail cross beam, which are assembled into one by welding. For large-scale mining dump trucks, the frame assembly is a key load-bearing component. Its upper end is connected to the cargo box and its lower end is connected to the running device. The overall assembly size requirements are high, the operating conditions are complex, and it needs to withstand strong dynamic and static load impacts. Therefore, the welding quality requirements of the weld are high. In the prior art, when welding the frame assembly, especially when welding large frame assemblies such as dump truck frame assemblies, the deformation after welding is large, which affects the quality of the frame and the quality of the weld. In order to control the deformation after welding, it is generally adopted to weld the sub-assemblies after rough processing first, and then put the frame assembly as a whole into the CNC machining center for drilling, milling planes and other processing to ensure the accuracy of these structural dimensions and positions. However, when facing large frame assemblies, this method requires a large CNC machining center and is very costly.

[0033] In response to the above problems, the present application provides a frame assembly welding tool and a frame assembly welding method, which can reduce the post-welding deformation when welding a large frame assembly, thereby improving the quality of the frame. In addition, the frame sub-assembly can be fine-processed first, and then the frame can be welded, saving costs.

[0034] According to one aspect of the present disclosure, a frame assembly welding tool is provided for welding a frame, referring to Figures 1 to 3As shown, the vehicle frame includes a middle cross beam 1, a rear longitudinal beam 2, a lower gantry beam 3 and a front longitudinal beam 4. The vehicle frame assembly welding tool includes: a bottom plate 10, a middle cross beam fixing mechanism 21, a rear longitudinal beam fixing mechanism 22, a lower gantry beam fixing mechanism 23 and a front longitudinal beam fixing mechanism 24, all of which are arranged on the bottom plate 10 and are respectively used to fix the middle cross beam 1, the rear longitudinal beam 2, the lower gantry beam 3 and the front longitudinal beam 4. After the middle cross beam 1, the rear longitudinal beam 2, the lower gantry beam 3 and the front longitudinal beam 4 are fixed to the vehicle frame assembly welding tool disclosed in the present invention, there is a first welding gap 101 between the rear longitudinal beam 2 and the middle cross beam 1, a second welding gap 102 between the lower gantry beam 3 and the rear longitudinal beam 2, and a third welding gap 103 between the front longitudinal beam 4 and the lower gantry beam 3.

[0035] The frame assembly welding tool disclosed in the present invention can fix the position of the main sub-assembly of the frame when welding the frame assembly, especially the large frame assembly such as the frame assembly of the dump truck, and make it have the first welding gap 101, the second welding gap 102 and the third welding gap 103, so as to improve the assembly dimensional accuracy of the frame, reduce the deformation after welding, and improve the quality of the frame. In addition, since the dimensional accuracy is guaranteed, the frame sub-assembly can be fine-machined first, and then the frame can be welded, so that the entire frame assembly does not need to be placed in a large-scale CNC machining center, saving costs. At the same time, the frame assembly welding tool disclosed in the present invention fixes the sub-assembly of the frame in a position that is conducive to welding processing, reduces the difficulty of welding, and can improve the quality level of the weld.

[0036] The frame assembly welding tool disclosed in the present invention can be used for welding large and super-large frames. Specifically, in an exemplary embodiment of the present invention, the frame assembly welding tool is used for welding a 300-ton mining dump truck frame assembly, and can meet the corresponding design and process requirements. Since the frame assembly is large, the welding cross-sectional area of ​​the butt joints at both ends of each welding gap is also large, so the middle cross beam fixing mechanism 21, the rear longitudinal beam fixing mechanism 22, the lower gantry beam fixing mechanism 23 and the front longitudinal beam fixing mechanism 24 are used to fix the middle cross beam 1, the rear longitudinal beam 2, the lower gantry beam 3 and the front longitudinal beam 4 of the frame respectively, and each sub-assembly to be welded can be controlled to be in a suitable welding position. Among them, the first welding gap 101, the second welding gap 102 and the third welding gap 103 can be selected according to the specific size of the frame and the process parameters of the welding. In an exemplary embodiment, the first welding gap 101, the second welding gap 102 and the third welding gap 103 are all 4-6mm, which can make the weld quality grade higher.

[0037] In an exemplary embodiment of the present disclosure, reference Figures 1 to 3As shown, the vehicle frame assembly further includes a main beam 5, a rear cross beam 6 and an upper gantry beam 7, and the vehicle frame assembly welding tool further includes: a main beam fixing mechanism 25, a rear cross beam fixing mechanism 26 and an upper gantry beam fixing mechanism 27, all of which are arranged on the bottom plate 10 and are respectively used to fix the above-mentioned main beam 5, the rear cross beam 6 and the upper gantry beam 7. Therefore, after the main beam 5, the rear cross beam 6 and the upper gantry beam 7 are fixed to the vehicle frame assembly welding tool disclosed in the present invention, a fourth welding gap 104 is provided between the main beam 5 and the front longitudinal beam 4, a fifth welding gap 105 is provided between the rear cross beam 6 and the rear longitudinal beam 2, and a sixth welding gap 106 is provided between the upper gantry beam 7 and the lower gantry beam 3.

[0038] In an exemplary embodiment of the present disclosure, reference Figure 1 As shown, the frame assembly as a whole is composed of a middle cross beam 1, a rear longitudinal beam 2, a lower gantry beam 3, a front longitudinal beam 4, a main beam 5, a rear cross beam 6 and an upper gantry beam 7. The frame assembly welding fixture disclosed in the present invention enables the welding process of the entire frame to be completed on one fixture, which can improve the quality of welding and reduce deformation after welding. In addition, since the overall volume of the frame is relatively large, the frame assembly welding fixture fixes several main components of the frame assembly, further facilitating the welding of the frame assembly and reducing the processes of positioning, moving and clamping various parts of the frame.

[0039] To facilitate description of the structure of the vehicle frame assembly welding tooling disclosed herein, a first direction, a second direction and a third direction are now provided, wherein the second direction is perpendicular to the bottom plate 10 , and the first direction, the second direction and the third direction are perpendicular to each other.

[0040] In an exemplary embodiment of the present disclosure, reference Figure 1 to Figure 2 As shown, the middle crossbeam fixing mechanism 21 may include a first locating pin 211 and a middle crossbeam locating seat 212. The middle crossbeam locating seat 212 is fixed to the bottom plate 10, and the first locating pin 211 is detachably connected to the middle crossbeam locating seat 212. The first locating pin 211 is arranged along the first direction and is used to be inserted into the first locating hole of the middle crossbeam 1 so that the middle crossbeam 1 is installed on the middle crossbeam locating seat 212. The first locating pin 211 fixes the middle crossbeam 1 to the middle crossbeam locating seat 212, and can locate the axis of the first locating hole of the middle crossbeam 1. The first locating hole can be a structural hole of the middle crossbeam 1 itself, or it can be a process hole specially processed for assembly.

[0041] The middle cross beam fixing mechanism 21 also includes a first clamping block 213 and a first clamping mechanism 214. The first clamping block 213 is connected to the first positioning pin 211, one end of which is close to the middle cross beam positioning seat 212, and the other end is in contact with the middle cross beam 1. For example, the first clamping block 213 has a connecting portion that matches the shape of the first positioning pin 211, so that the first clamping block 213 can be inserted on the first positioning pin 211. The first clamping block 213 can be detachably connected to the first positioning pin 211, making assembly easier. The first clamping block 213 has two opposite positioning surfaces, which are respectively close to the middle cross beam positioning seat 212 and the middle cross beam 1. The first clamping mechanism 214 is movably arranged along the first direction, so that the middle cross beam 1 is positioned by the first clamping block 213 in the first direction, and the middle cross beam 1 is clamped in the first direction. For example, the first clamping mechanism 214 can be a push rod, a bolt, or an adjustable boss.

[0042] The middle cross beam fixing mechanism 21 may further include a first adjustment mechanism 215. The first adjustment mechanism 215 contacts the middle cross beam 1 to limit the middle cross beam 1 in the second direction. The first adjustment mechanism 215 may be movably arranged on the bottom plate 10 along the second direction, so that it can cooperate with the first positioning pin 211 to adjust the angle of the middle cross beam 1 relative to the bottom plate 10. For example, the first adjustment mechanism 215 may be a top rod, a bolt, or a boss with adjustable height, etc., and its position may be arranged to contact the center of the middle cross beam 1, so that the position of the middle cross beam 1 can be adjusted more accurately.

[0043] In an exemplary embodiment of the present disclosure, reference Figure 1 to Figure 2 As shown, the rear longitudinal beam fixing mechanism 22 may include a rear longitudinal beam supporting device 221, a second adjusting mechanism 222, a third adjusting mechanism 223, and a second clamping mechanism 224. The rear longitudinal beam supporting device 221 is fixed to the bottom plate 10, and the second adjusting mechanism 222 and the third adjusting mechanism 223 are both arranged on the rear longitudinal beam supporting device 221 and contact the rear longitudinal beam 2. For example, the second adjusting mechanism 222 and the third adjusting mechanism 223 are respectively in contact with the two ends of the rear longitudinal beam 2 to support the rear longitudinal beam 2 in the second direction. The second clamping mechanism 224 is movably arranged on the rear longitudinal beam supporting device 221 along the first direction to clamp the rear longitudinal beam 2 in the first direction.

[0044] In addition, the second adjustment mechanism 222 and the third adjustment mechanism 223 can be movably provided on the rear longitudinal beam support device 221 along the second direction, so that the height and angular position relationship of the rear longitudinal beam 2 in the second direction relative to the bottom plate 10 can be adjusted. The second adjustment mechanism 222, the third adjustment mechanism 223 and the second clamping mechanism 224 can also be a push rod, a bolt, or an adjustable boss, etc.

[0045] In an exemplary embodiment of the present disclosure, reference Figure 1 to Figure 2 As shown, the lower gantry beam fixing mechanism 23 includes a second locating pin 231, a third locating pin 232 and a lower gantry beam locating seat 233. The lower gantry beam locating seat 233 is fixed on the bottom plate 10, and the second locating pin 231 and the third locating pin 232 are detachably connected to the lower gantry beam locating seat 233. The second locating pin 231 is arranged along the third direction, and the third locating pin 232 is arranged along the second direction. The second locating pin 231 is used to be inserted into the second locating hole of the lower gantry beam 3, and the third locating pin 232 is used to be inserted into the third locating hole of the lower gantry beam 3, so that the lower gantry beam 3 is installed on the lower gantry beam locating seat 233. The second locating pin 231 and the third locating pin 232 respectively locate the axes of the second locating hole and the third locating hole of the lower gantry beam 3 in the third direction and the second direction perpendicular to each other, so that the position of the lower gantry beam 3 is more accurate. Since the lower gantry beam 3 needs to be welded to the rear longitudinal beam 2, the front longitudinal beam 4 and the upper gantry beam 7 respectively later, the accuracy of the position of the lower gantry beam 3 plays a vital role in the welding quality.

[0046] In an exemplary embodiment of the present disclosure, reference Figure 1 to Figure 2 As shown, the front longitudinal beam fixing mechanism 24 includes a front longitudinal beam supporting device 241 and a fourth adjusting mechanism 242. The front longitudinal beam supporting device 241 is fixed to the bottom plate 10, and the fourth adjusting mechanism 242 is provided on the front longitudinal beam supporting device 241 and contacts the front longitudinal beam 4 to support the front longitudinal beam 4 in the second direction. Moreover, the fourth adjusting mechanism 242 can be movably provided on the front longitudinal beam supporting device 241 along the second direction, so that the height and angle of the front longitudinal beam 4 relative to the bottom plate 10 can be adjusted.

[0047] The front longitudinal beam fixing mechanism 24 may further include a third clamping mechanism 243, which is movably disposed on the front longitudinal beam supporting device 241 along the first direction to clamp the front longitudinal beam 4 in the first direction. Specifically, the fourth adjustment mechanism 242 and the third clamping mechanism 243 may be a push rod, a bolt, or an adjustable boss.

[0048] In an exemplary embodiment of the present disclosure, reference Figure 1 to Figure 2 As shown, the main beam fixing mechanism 25 includes a main beam supporting device 251 and a fifth adjusting mechanism 252. The main beam supporting device 251 is fixed on the base plate 10, and the fifth adjusting mechanism 252 is in contact with the main beam 5 to support the main beam 5 in the second direction. Of course, the fifth adjusting mechanism 252 can be movably provided on the base plate 10 along the second direction to adjust the height and angle of the main beam 5 relative to the base plate 10.

[0049] In an exemplary embodiment of the present disclosure, reference Figure 1 to Figure 2As shown, the tail beam fixing mechanism 26 includes a fourth locating pin 261, a fifth locating pin 262 and a tail beam locating seat 263. The tail beam locating seat 263 is fixed on the bottom plate 10, and the fourth locating pin 261 and the fifth locating pin 262 are detachably connected to the tail beam locating seat 263, and are both arranged along the first direction, and the axes of the fourth locating pin 261 and the fifth locating pin 262 are parallel and do not overlap. The fourth locating pin 261 is used to be inserted into the fourth locating hole of the tail beam 6, and the fifth locating pin 262 is used to be inserted into the fifth locating hole of the tail beam 6, so that the tail beam 6 is installed on the tail beam locating seat 263.

[0050] The tail beam fixing mechanism 26 also includes a second clamping block 264 and a fourth clamping mechanism 265. The second clamping block 264 is abutted against the tail beam positioning seat 263 and contacts the tail beam 6. For example, the second clamping block 264 has a connecting portion that matches the shape of the fifth positioning pin 262, so that the second clamping block 264 can be inserted into the fifth positioning pin 262. The second clamping block 264 can be detachably connected to the fifth positioning pin 262, making assembly easier. The second clamping block 264 has two opposite positioning surfaces, and is respectively abutted against the tail beam positioning seat 263 and the tail beam 6. The fourth clamping mechanism is movably arranged on the tail beam positioning seat 263 along the first direction, so that the tail beam 6 is positioned by the second clamping block 264 in the first direction, and the tail beam 6 is clamped in the first direction. For example, the fourth clamping mechanism 265 can be a push rod, a bolt, or an adjustable boss, etc.

[0051] In an exemplary embodiment of the present disclosure, reference Figure 1 to Figure 2 As shown, the upper gantry beam fixing mechanism 27 includes a sixth positioning pin 271 and an upper gantry beam positioning seat 272. The upper gantry beam positioning seat 272 is fixed to the base plate 10, and the sixth positioning pin 271 is detachably connected to the upper gantry beam positioning seat 272, and the sixth positioning pin 271 is arranged along the third direction. The sixth positioning pin 271 is used to be inserted into the sixth positioning hole of the upper gantry beam 7, so that the upper gantry beam 7 is installed on the upper gantry beam positioning seat 272.

[0052] The upper gantry beam fixing mechanism 27 also includes a third clamping block 273 and a fifth clamping mechanism 274. The third clamping block 273 is abutted against the upper gantry beam positioning seat 272 and contacts the upper gantry beam 7. For example, the third clamping block 273 has a connecting portion that matches the shape of the sixth positioning pin 271, so that the third clamping block 273 can be inserted thereon. The third clamping block 273 can be detachably connected to the sixth positioning pin 271, making assembly easier. The third clamping block 273 has two opposite positioning surfaces, and is respectively abutted against the upper gantry beam positioning seat 272 and the upper gantry beam 7. The fifth clamping mechanism 274 is movably arranged on the upper gantry beam positioning seat 272 along the third direction, so that the upper gantry beam 7 is positioned by the third clamping block 273 in the third direction, and clamps the upper gantry beam 7 in the third direction. For example, the fifth clamping mechanism 274 can be a push rod, a bolt, or an adjustable boss, etc.

[0053] In an exemplary embodiment of the present disclosure, reference Figure 1 to Figure 2 As shown, the frame assembly welding tooling can also include a support reinforcement mechanism 28, which can be arranged on the bottom plate 10 to play the role of reinforcing the tooling. For example, the support reinforcement mechanism 28 can be a square steel frame, and connects the lower gantry beam fixing mechanism 23 and the bottom plate 10 to support the lower gantry beam fixing mechanism 23 with a large load.

[0054] In addition, the frame assembly welding tool may also include an auxiliary mechanism 29 for assisting the operation. Figure 1 to Figure 2 As shown, the auxiliary mechanism 29 can be a square steel frame and connected to the tail beam fixing mechanism 26. When the staff is working, due to the large size and high height of the frame, they can stand on the auxiliary mechanism 29 to facilitate the work. The auxiliary mechanism 29 can also be used to place other auxiliary tools required in the operation.

[0055] In an exemplary embodiment of the present disclosure, reference Figure 1 and Figure 3 As shown, there are two front longitudinal beams 4 and two rear longitudinal beams 2, and the two rear longitudinal beams 2 respectively form two first welding gaps 101 and two second welding gaps 102 with the middle cross beam 1 and the lower gantry beam 3, and the two front longitudinal beams 4 respectively form two third welding gaps 103 with the lower gantry beam 3. The rear longitudinal beam fixing mechanism 22 can be arranged in pairs to fix the two rear longitudinal beams 2 at the same time, and the front longitudinal beam fixing mechanism 24 can also be arranged in pairs to fix the two front longitudinal beams 4 at the same time.

[0056] According to another aspect of the present disclosure, a frame assembly welding method is provided for welding a frame, referring to Figure 4 As shown, including:

[0057] Step S110, installing the middle cross beam 1 of the frame to the middle cross beam fixing mechanism 21 on the bottom plate 10;

[0058] Step S120, installing the rear longitudinal beam 2 of the frame to the rear longitudinal beam fixing mechanism 22 on the bottom plate 10, so that a first welding gap 101 is formed between the rear longitudinal beam 2 and the middle cross beam 1 on the middle cross beam fixing mechanism 21;

[0059] Step S130, installing the lower gantry beam 3 of the frame to the lower gantry beam fixing mechanism 23 on the bottom plate 10, so that a second welding gap 102 exists between the lower gantry beam 3 and the rear longitudinal beam 2 on the rear longitudinal beam fixing mechanism 22;

[0060] Step S140, installing the front longitudinal beam 4 of the frame to the front longitudinal beam fixing mechanism 24 on the bottom plate 10, so that a third welding gap 103 is formed between the front longitudinal beam 4 and the lower gantry beam 3 on the lower gantry beam fixing mechanism 23;

[0061] Step S150, the middle cross beam 1 and the rear longitudinal beam 2 are welded together to fill the first welding gap 101, the rear longitudinal beam 2 and the lower gantry beam 3 are welded together to fill the second welding gap 102, and the front longitudinal beam 4 and the lower gantry beam 3 are welded together to fill the third welding gap 103;

[0062] Step S160, heat-insulating the welds formed after the first welding gap 101, the second welding gap 102 and the third welding gap 103 are welded and filled.

[0063] The frame assembly welding method disclosed in the present invention can improve the assembly dimensional accuracy of the frame, reduce deformation after welding, and improve the quality of the frame. Moreover, since the dimensional accuracy is guaranteed, the frame sub-assembly can be fine-machined first, and then the frame can be welded, so that the entire frame assembly does not need to be placed in a large-scale CNC machining center, saving costs. In addition, the frame assembly welding method disclosed in the present invention can be combined with the frame assembly welding tool disclosed in the present invention, which plays a role in improving the welding quality when welding large frame assemblies. Especially in the welding of the frame assembly of a 300-ton mining dump truck, the deformation after welding can be effectively controlled, so that the next assembly process can be carried out directly after welding without the need for overall processing such as drilling.

[0064] In an exemplary embodiment of the present disclosure, the vehicle frame assembly welding method further includes:

[0065] The main beam 5 of the frame is mounted to the main beam fixing mechanism 25 on the bottom plate 10 so that a fourth welding gap 104 is formed between the main beam 5 and the front longitudinal beam 4 on the front longitudinal beam fixing mechanism 24;

[0066] Install the rear cross beam 6 of the frame to the rear cross beam fixing mechanism 26 on the bottom plate 10 so that a fifth welding gap 105 is formed between the rear cross beam 6 and the rear longitudinal beam 2 on the rear longitudinal beam fixing mechanism 22;

[0067] Mount the upper gantry beam 7 of the vehicle frame to the upper gantry beam fixing mechanism 27 on the bottom plate 10 so that a sixth welding gap 106 is formed between the upper gantry beam 7 and the lower gantry beam 3 on the lower gantry beam fixing mechanism 23;

[0068] The main beam 5 and the front longitudinal beam 4 are welded together to fill the fourth welding gap 104, the tail cross beam 6 and the rear longitudinal beam 2 are welded together to fill the fifth welding gap 105, and the upper gantry beam 7 and the lower gantry beam 3 are welded together to fill the sixth welding gap 106;

[0069] The welds formed after the fourth welding gap 104, the fifth welding gap 105 and the sixth welding gap 106 are filled and welded are insulated.

[0070] The frame assembly welding method disclosed in the present invention enables the welding process of the entire frame to be completed on one tool, which can improve the quality of welding and reduce deformation after welding. In addition, since the overall volume of the frame is relatively large, by fixing the several main components of the frame assembly, the welding of the frame assembly is further facilitated, and the positioning, moving, and clamping processes of the various parts of the frame can be reduced. In addition, the weld seam after welding is kept warm, which is conducive to slowing down the cooling rate of the weld seam and the heat-affected zone, and reducing welding stress and deformation.

[0071] To facilitate the description of the vehicle frame assembly welding method disclosed herein, a first direction, a second direction, and a third direction are provided, wherein the second direction is perpendicular to the bottom plate 10, and the first direction, the second direction, and the third direction are perpendicular to each other. The first direction, the second direction, and the third direction are consistent with the exemplary embodiment of the vehicle frame assembly welding tooling described above.

[0072] Specifically, in an exemplary embodiment of the present disclosure, step S110, mounting the middle cross beam 1 to the middle cross beam fixing mechanism 21 on the bottom plate 10, includes:

[0073] Insert the first positioning pin 211 into the first positioning hole of the middle crossbeam 1 and the middle crossbeam positioning seat 212;

[0074] Insert the first clamping block 213 into the first positioning pin 211 and abut against the middle beam positioning seat 212, and abut the middle beam 1 against the side of the first clamping block 213 away from the middle beam positioning seat 212;

[0075] Move the first clamping mechanism 214 along the first direction to clamp the middle crossbeam 1;

[0076] The first adjusting mechanism 215 is moved along the second direction to adjust the height from the middle cross beam 1 to the bottom plate 10 .

[0077] Furthermore, the first locating pin 211 may be inserted after the first locating hole of the middle cross beam 1 is aligned with the installation position of the corresponding first locating pin 211 of the middle cross beam locating seat 212; or the first locating pin 211 may be inserted into the first locating hole of the middle cross beam 1 first, and then the first locating pin 211 may be installed to the middle cross beam locating seat 212, so as to facilitate the handling and implementation at the production site. The first clamping block 213 may be replaced according to the positioning size of the frame to improve the applicability, and the first clamping mechanism 214 may be a top clamping plate with adjustable position on the first locating pin 211, which may be clamped at the end of the middle cross beam 1 away from the first clamping block 213. In an exemplary embodiment of the present disclosure, the first adjustment mechanism 215 is used to adjust the height dimension of the center of the middle hole of the middle cross beam 1 to 1330±2mm from the upper surface of the bottom plate 10.

[0078] In an exemplary embodiment of the present disclosure, step S120, mounting the rear longitudinal beam 2 to the rear longitudinal beam fixing mechanism 22 on the bottom plate 10, includes:

[0079] Place the rear longitudinal beam 2 on the rear longitudinal beam supporting device 221 and connect it with the middle cross beam 1;

[0080] Move the second adjustment mechanism 222 and the third adjustment mechanism 223 along the second direction to adjust the height from the rear longitudinal beam 2 to the bottom plate 10;

[0081] The second clamping mechanism 224 is moved along the first direction to clamp the rear longitudinal beam 2 .

[0082] Furthermore, the rear longitudinal beam 2 can be hoisted into the rear longitudinal beam support device 221 and inserted into the middle cross beam 1. The second adjustment mechanism 222 and the third adjustment mechanism 223 are bolts, which respectively support the two ends of the rear longitudinal beam 2 in the second direction, and the height dimension of the lower cover plate of the beam body of the rear longitudinal beam 2 from the upper surface of the bottom plate 10 can be adjusted to 1330±2mm by adjusting the position of the bolts. The second clamping mechanism 224 can be a bolt along the first direction, which can tighten the rear longitudinal beam 2 laterally.

[0083] In an exemplary embodiment of the present disclosure, step S130, mounting the lower gantry beam 3 to the lower gantry beam fixing mechanism 23 on the base plate 10, comprises:

[0084] Insert the second positioning pin 231 into the second positioning hole of the lower gantry beam 3 and the lower gantry beam positioning seat 233, and connect the lower gantry beam 3 with the rear longitudinal beam 2;

[0085] The third positioning pin 232 is inserted into the third positioning hole of the lower gantry beam 3 and the lower gantry beam positioning seat 233 .

[0086] Furthermore, the second locating pin 231 may be inserted after the second locating hole of the lower gantry beam 3 is aligned with the installation position of the corresponding second locating pin 231 of the lower gantry beam locating seat 233, or the second locating pin 231 may be inserted into the second locating hole of the lower gantry beam 3 first, and then the whole gantry beam is hoisted into the lower gantry beam locating seat 233, so as to facilitate the handling and implementation at the production site. Then, the lower gantry beam 3 is inserted into the interface at the front end of the rear longitudinal beam 2, so as to determine the position of the lower gantry beam 3. Then, the third locating pin 232 is used to press the lower gantry beam 3 in the second direction to fix it.

[0087] In an exemplary embodiment of the present disclosure, step S140, mounting the front longitudinal beam 4 to the front longitudinal beam fixing mechanism 24 on the bottom plate 10, includes:

[0088] Place the front longitudinal beam 4 on the front longitudinal beam support device 241 and connect it with the lower gantry beam 3;

[0089] Move the fourth adjustment mechanism 242 along the second direction to adjust the height from the front longitudinal beam 4 to the bottom plate 10;

[0090] The third clamping mechanism 243 is moved along the first direction to clamp the front side beam 4 .

[0091] Furthermore, the front longitudinal beam 4 can be hoisted into the front longitudinal beam support device 241 and inserted into the front end of the lower gantry beam 3. The fourth adjustment mechanism 242 can be an adjustment bolt, which adjusts the height dimension of the lower cover plate of the front longitudinal beam 4 from the upper surface of the bottom plate 10 to 805±2mm. The third clamping mechanism 243 can be a tightening mechanism such as a tightening seat, a tightening bolt, etc., which moves along the first direction until the middle plate of the front longitudinal beam 4 is 1700±2mm away from the center of the frame, and then clamps the front longitudinal beam 4.

[0092] In an exemplary embodiment of the present disclosure, a main beam fixing mechanism 25 for mounting the main beam 5 to the base plate 10 includes:

[0093] Place the main beam 5 on the main beam support device 251 and connect it with the front longitudinal beam 4;

[0094] The fifth adjusting mechanism 252 is moved along the second direction to adjust the height from the main beam 5 to the bottom plate 10 .

[0095] Furthermore, the main beam 5 can be hoisted into the main beam support device 251, and its round tube is closely attached to the arc of the front longitudinal beam 4, and the two ends of the main beam 5 are flush with the outer facade of the front longitudinal beam 4. The fifth adjustment mechanism 252 can be a height-adjustable top plate, and the height dimension of the front end bottom of the main beam 5 from the upper surface of the bottom plate 10 is adjusted to 955±2mm, and then the main beam 5 can be pressed in the second direction.

[0096] In an exemplary embodiment of the present disclosure, a tail beam fixing mechanism 26 for mounting the tail beam 6 to the bottom plate 10 includes:

[0097] Place the tail cross beam 6 on the tail cross beam positioning seat 263 and connect it with the rear longitudinal beam 2;

[0098] Insert the fourth positioning pin 261 into the fourth positioning hole of the tail beam 6 and the tail beam positioning seat 263, and insert the fifth positioning pin 262 into the fifth positioning hole of the tail beam 6 and the tail beam positioning seat 263;

[0099] Insert the second clamping block 264 into the fifth positioning pin 262 and abut against the tail beam positioning seat 263, and abut the tail beam 6 against the side of the second clamping block 264 away from the tail beam positioning seat 263;

[0100] The fourth clamping mechanism 265 is moved along the first direction to clamp the tail beam 6 .

[0101] Further, the fourth locating pin 261 and the fifth locating pin 262 can be inserted into the fourth locating hole and the fifth locating hole of the tail beam 6 respectively, and then hoisted into the tail beam locating seat 263 as a whole, or the tail beam 6 can be hoisted until the fourth locating hole and the fifth locating hole are aligned with the corresponding hole positions on the tail beam locating seat 263 respectively, and then the fourth locating pin 261 and the fifth locating pin 262 are inserted. Since the volume of the tail beam 6 is relatively small, the weight is relatively light, and it has two positioning axes, it can be easy to assemble by first hoisting the tooling and then inserting the locating pins. The second clamping block 264 can be replaced according to the positioning size of the frame to improve applicability. The fourth clamping mechanism 265 can be a top clamping plate with adjustable position on the fourth locating pin 261 or the fifth locating pin 262, which can be clamped at the end of the tail beam 6 away from the second clamping block 264. Of course, a fourth clamping mechanism 265 may also be provided on both the fourth positioning pin 261 and the fifth positioning pin 262 to enhance the clamping effect.

[0102] In an exemplary embodiment of the present disclosure, the upper gantry beam fixing mechanism 27 for mounting the upper gantry beam 7 to the base plate 10 includes:

[0103] Place the upper gantry beam 7 on the upper gantry beam positioning seat 272 and connect it with the lower gantry beam 3;

[0104] Insert the sixth positioning pin 271 into the sixth positioning hole of the upper gantry beam 7 and the upper gantry beam positioning seat 272;

[0105] Insert the third clamping block 273 into the sixth positioning pin 271 and abut against the upper gantry beam positioning seat 272, and abut the upper gantry beam 7 against the side of the third clamping block 273 away from the upper gantry beam positioning seat 272;

[0106] The fifth clamping mechanism 274 is moved along the third direction to clamp the upper gantry beam 7 .

[0107] Further, the upper gantry beam 7 can be hoisted into the upper gantry beam positioning seat 272 and inserted into the lower gantry beam 3. The sixth positioning pin 271 is inserted into the sixth positioning hole of the upper gantry beam 7 and then installed on the upper gantry beam positioning seat 272. The third clamping block 273 can be replaced according to the positioning size of the frame to improve applicability, and the fifth clamping mechanism 274 can be a top clamping plate with adjustable position on the sixth positioning pin 271, which can be clamped at one end of the upper gantry beam 7 away from the third clamping block 273.

[0108] In an exemplary embodiment of the present disclosure, when welding the parts of the frame, the frame assembly welding method further includes adjusting the gaps of the butted parts, that is, adjusting the first welding gap 101, the second welding gap 102, the third welding gap 103, the fourth welding gap 104, the fifth welding gap 105 and the sixth welding gap 106. If the size of the above gaps does not meet the preset size after the parts of the frame are installed, they need to be adjusted to meet the preset size. For example, the preset sizes of the above gaps are all 4-6mm. After the parts of the frame are installed, the butt joints of the frame with a gap less than 4mm are polished to meet the requirements to prevent affecting the accuracy of the welding process.

[0109] In an exemplary embodiment of the present disclosure, there are two front longitudinal beams 4 and two rear longitudinal beams 2. The two rear longitudinal beams 2 respectively form two first welding gaps 101 and two second welding gaps 102 with the middle cross beam 1 and the lower gantry beam 3. The two front longitudinal beams 4 respectively form two third welding gaps 103 with the lower gantry beam 3. The two front longitudinal beams 4 also respectively form two fourth welding gaps 104 with the main beam 5. The two rear longitudinal beams 2 respectively form two fifth welding gaps 105 with the tail cross beam 6. Moreover, the lower gantry beam 3 also forms two sixth welding gaps 106 with the upper gantry beam 7.

[0110] Then, the two first welding gaps 101 are welded at the same time, the two second welding gaps 102 are welded at the same time, the two third welding gaps 103 are welded at the same time, the two fourth welding gaps 104 are welded at the same time, the two fifth welding gaps 105 are welded at the same time, and the two sixth welding gaps 106 are welded at the same time, which can effectively reduce the welding internal stress of the frame, thereby reducing deformation.

[0111] In an exemplary embodiment of the present disclosure, at step S150, before welding and filling the first welding gap 101, the second welding gap 102 and the third welding gap 103, the vehicle frame assembly welding method further includes:

[0112] Obtain the theoretical position relationship of the frame;

[0113] Use a laser tracking device to detect the actual position relationship of the frame;

[0114] When the actual positional relationship is consistent with the theoretical positional relationship, positioning welding is performed on at least one of the first welding gap 101 , the second welding gap 102 , and the third welding gap 103 .

[0115] Specifically, the theoretical position relationship of the frame is the positioning dimensions of each part of the frame relative to the tooling calculated based on the actual dimensions of the frame and the frame assembly welding tooling, that is, the preset values ​​of the positioning dimensions that each part of the frame should have before welding after being installed on the frame assembly welding tooling. The actual position relationship refers to the actual positioning dimensions that each part of the frame has relative to the frame assembly welding tooling after being installed on the frame assembly welding tooling before welding. For example, the height dimension of the center of the middle hole of the aforementioned middle cross beam 1 from the upper surface of the bottom plate 10, the height dimension of the lower cover plate of the beam body of the rear longitudinal beam 2 from the upper surface of the bottom plate 10, the height dimension of the lower cover plate of the beam body of the front longitudinal beam 4 from the upper surface of the bottom plate 10, etc. Before welding, a laser tracker is used to detect the actual positioning dimensions of the above-mentioned frame parts, and when the actual position relationship is consistent with the theoretical position relationship, positioning welding is performed on part or all of the first welding gap 101, the second welding gap 102 and the third welding gap 103. When the actual position relationship is inconsistent with the theoretical position relationship, the position of the frame response component is adjusted by the aforementioned frame assembly welding tooling to make the actual position relationship consistent with the theoretical position relationship, thereby improving the dimensional accuracy of welding.

[0116] In an exemplary embodiment of the present disclosure, the welding sequence of the frame assembly is:

[0117] First, welding is performed to fill the first welding gap 101, the second welding gap 102, the third welding gap 103, and the fifth welding gap 105;

[0118] Welding again to fill the sixth welding gap 106;

[0119] Finally, welding is performed to fill the fourth welding gap 104 .

[0120] It should be noted that welding to fill the first welding gap 101 refers to welding the middle cross beam 1 and the rear longitudinal beam 2 together to fill the first welding gap 101. The same is true for the other welding gaps, which will not be described in detail here. Among them, the welding order of the first welding gap 101, the second welding gap 102, the third welding gap 103 and the fifth welding gap 105 can be interchanged, or welding can be performed simultaneously. After the first welding gap 101, the second welding gap 102, the third welding gap 103 and the fifth welding gap 105 are welded and filled, welding is then performed to fill the sixth welding gap 106, and finally welding is performed to fill the fourth welding gap 104. This order is conducive to controlling the deformation of large frames and improving the distribution of stress.

[0121] In an exemplary embodiment of the present disclosure, at least two weldings are performed on the first welding gap 101 , the second welding gap 102 , the third welding gap 103 , the fourth welding gap 104 , the fifth welding gap 105 and the sixth welding gap 106 , and the welding starting points of the at least two weldings are different.

[0122] Since the vehicle frame assembly welding method disclosed in the present invention is mainly applied to large vehicle frame assemblies, which have the characteristics of large welding joint area and difficult to control weld quality, multiple welding is performed to help control welding accuracy. For example, for each welding gap, at least a base weld, a filler weld and a cap weld are performed, wherein the filler weld can weld multiple layers, such as 4-6 layers or more.

[0123] Taking the welding of the first welding gap 101 as an example, the same is true for other welding gaps. For example, the welding joint between the middle cross beam 1 and the rear longitudinal beam 2 is a quadrilateral, and each layer of welding processing produces a set of outer welds, inner welds, upper welds and lower welds. The base weld is welded in the order of outer welds, inner welds, upper welds and lower welds. The first layer of the filling weld can be welded in the order of inner welds, outer welds, lower welds and upper welds. The second layer of the filling weld can be welded in the same order as the base weld. After that, each layer follows this rule, that is, the welding order of each layer in multi-layer welding can be staggered, which can optimize the stress distribution after welding and control deformation.

[0124] On this basis, the second layer of the filling weld can also be welded in the same order as the first layer of the filling weld, and the third layer of the filling weld can be welded in the same order as the base weld, that is, the welding sequence is staggered in units of two layers in the multi-layer welding of the filling weld, thereby appropriately reducing the complexity of welding and improving welding efficiency on the basis of optimizing the stress distribution after welding. Of course, the same is true for the case where the weld joint is in other shapes. In multiple welding, the starting point of welding should change, so that the generation order of multiple welds formed by each layer of welding is different.

[0125] In an exemplary embodiment of the present disclosure, in step S160, the weld formed after welding is insulated, and insulation materials such as insulation cotton can be used. Among them, the front and rear welds of the first welding gap 101, the upper and lower welds of the fifth welding gap 105, the upper and lower welds of the second welding gap 102, and the external welds of the sixth welding gap 106 use thicker insulation materials and longer insulation time. In an exemplary embodiment, the above welds are wrapped with 30-50mm thick insulation cotton and kept warm for 12 hours; for other welds, they are wrapped with 20-30mm thick insulation cotton and kept warm for 8 hours, so that the state of the welding interface organization is more stable and the stress distribution is more balanced.

[0126] In an exemplary embodiment of the present disclosure, the first welding gap 101, the second welding gap 102 and the fifth welding gap 105 are welded using a first welding mode, the third welding gap 103 and the fourth welding gap 104 are welded using a second welding mode, and the sixth welding gap 106 is welded using a third welding mode. At least one welding parameter in the first welding mode, the second welding mode and the third welding mode is not completely the same.

[0127] Specifically, the welding parameters include welding current, arc voltage, welding speed, welding gas and shielding gas flow rate. In an exemplary embodiment, the welding parameters of the first welding mode are: welding current 270-320A, welding voltage 24.5-28V, welding speed 30-40cm / min, welding gas 80% Ar+20% CO2, and shielding gas flow rate 18-20L / min. The welding parameters of the second welding mode are: welding current 216-266A, welding voltage 22.5-25.5V, welding speed 20-30cm / min, welding gas 80% Ar+20% CO2, and shielding gas flow rate 18-20L / min. The welding parameters of the third welding mode are: welding current 225-275A, welding voltage 22-25V, welding speed 20-30cm / min, welding gas 80% Ar+20% CO2, and shielding gas flow rate 18-20L / min. For large dump truck frame assemblies, especially for 300-ton mining dump truck frame assemblies, the joint sizes between the sub-assemblies to be welded are large, and the sizes of the welded joints between the welding gaps are also very different. Therefore, different welding modes corresponding to different welding parameters are used, which is conducive to improving the quality level of the weld and uniformly controlling the process parameters during the production process.

[0128] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0129] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from its scope. The scope of protection of the present disclosure is limited only by the appended claims.

Claims

1. A frame assembly welding tool, characterized in that: The frame assembly welding tool is used for welding a frame, and the frame assembly welding tool comprises: Bottom plate (10); A middle cross beam fixing mechanism (21) is arranged on the bottom plate (10), and the middle cross beam fixing mechanism (21) is used to fix the middle cross beam (1) of the frame; A rear longitudinal beam fixing mechanism (22) is arranged on the bottom plate (10), the rear longitudinal beam fixing mechanism (22) is used to fix the rear longitudinal beam (2) of the frame, and to provide a first welding gap (101) between the rear longitudinal beam (2) and the middle cross beam (1) on the middle cross beam fixing mechanism (21); A lower gantry beam fixing mechanism (23) is arranged on the bottom plate (10), the lower gantry beam fixing mechanism (23) is used to fix the lower gantry beam (3) of the frame, and to provide a second welding gap (102) between the lower gantry beam (3) and the rear longitudinal beam (2) on the rear longitudinal beam fixing mechanism (22); A front longitudinal beam fixing mechanism (24) is arranged on the bottom plate (10), the front longitudinal beam fixing mechanism (24) is used to fix the front longitudinal beam (4) of the frame, and to provide a third welding gap (103) between the front longitudinal beam (4) and the lower gantry beam (3) on the lower gantry beam fixing mechanism (23); A main beam fixing mechanism (25) is arranged on the bottom plate (10), the main beam fixing mechanism (25) is used to fix the main beam (5) of the frame, and to provide a fourth welding gap (104) between the main beam (5) and the front longitudinal beam (4) on the front longitudinal beam fixing mechanism (24); A rear cross beam fixing mechanism (26) is arranged on the bottom plate (10), the rear cross beam fixing mechanism (26) is used to fix the rear cross beam (6) of the frame, and to provide a fifth welding gap (105) between the rear cross beam (6) and the rear longitudinal beam (2) on the rear longitudinal beam fixing mechanism (22); An upper gantry beam fixing mechanism (27) is arranged on the bottom plate (10), the upper gantry beam fixing mechanism (27) is used to fix the upper gantry beam (7) of the frame, and to provide a sixth welding gap (106) between the upper gantry beam (7) and the lower gantry beam (3) on the lower gantry beam fixing mechanism (23); The main beam fixing mechanism (25) comprises a main beam supporting device and a fifth adjusting mechanism, wherein the main beam supporting device is fixed on the base plate (10), the fifth adjusting mechanism is movably arranged on the base plate (10) along the second direction, and the fifth adjusting mechanism is in contact with the main beam (5) to support the main beam (5); The tail cross beam fixing mechanism (26) comprises a fourth positioning pin, a fifth positioning pin, a tail cross beam positioning seat, a second clamping block and a fourth clamping mechanism, the tail cross beam positioning seat is fixed on the bottom plate (10), the fourth positioning pin and the fifth positioning pin are detachably connected to the tail cross beam positioning seat, and are both arranged along the first direction, the fourth positioning pin is used to be inserted into the fourth positioning hole of the tail cross beam (6), and the fifth positioning pin is used to be inserted into the fifth positioning hole of the tail cross beam (6), so that the tail cross beam (6) is installed on the tail cross beam positioning seat; the second clamping block is abutted against the tail cross beam positioning seat and contacts the tail cross beam (6), the second clamping block is detachably connected to the fifth positioning pin, and the fourth clamping mechanism is movably arranged on the tail cross beam positioning seat along the first direction to clamp the tail cross beam (6) in the first direction; The upper gantry beam fixing mechanism (27) comprises a sixth positioning pin, an upper gantry beam positioning seat, a third clamping block and a fifth clamping mechanism, the upper gantry beam positioning seat is fixed on the base plate (10), the sixth positioning pin is detachably connected to the upper gantry beam positioning seat, the sixth positioning pin is arranged along a third direction, the sixth positioning pin is used to be inserted into a sixth positioning hole of the upper gantry beam (7) so that the upper gantry beam (7) is installed on the upper gantry beam positioning seat, the third clamping block is abutted against the upper gantry beam positioning seat and contacts the upper gantry beam (7), the third clamping block is detachably connected to the sixth positioning pin, and the fifth clamping mechanism is movably arranged on the upper gantry beam positioning seat along the third direction so as to clamp the upper gantry beam (7) in the third direction; The second direction is perpendicular to the bottom plate (10), and the first direction, the second direction and the third direction are perpendicular to each other.

2. The frame assembly welding tool according to claim 1, characterized in that: The middle crossbeam fixing mechanism (21) comprises a first positioning pin, a middle crossbeam positioning seat, a first clamping block, a first clamping mechanism and a first adjusting mechanism, the middle crossbeam positioning seat is fixed on the bottom plate (10), the first positioning pin is detachably connected to the middle crossbeam positioning seat, the first positioning pin is arranged along a first direction, the first positioning pin is used to be inserted into a first positioning hole of the middle crossbeam (1) so that the middle crossbeam (1) is installed on the middle crossbeam positioning seat; the first clamping block is connected to the first positioning pin, the first clamping block is abutted against the middle crossbeam positioning seat and contacts the middle crossbeam (1), the first clamping mechanism is movably arranged along the first direction so as to clamp the middle crossbeam (1) in the first direction, and the first adjusting mechanism contacts the middle crossbeam (1) so as to limit the middle crossbeam (1) in a second direction; Wherein, the first clamping block is detachably connected to the first positioning pin, the first adjusting mechanism is movably arranged on the base plate (10) along the second direction; the second direction is perpendicular to the base plate (10), and the first direction is perpendicular to the second direction; and / or, The rear longitudinal beam fixing mechanism (22) comprises a rear longitudinal beam supporting device, a second adjusting mechanism, a third adjusting mechanism and a second clamping mechanism, the rear longitudinal beam supporting device is fixed on the bottom plate (10), the second adjusting mechanism and the third adjusting mechanism are both arranged on the rear longitudinal beam supporting device and contact the rear longitudinal beam (2) to support the rear longitudinal beam (2), and the second clamping mechanism is movably arranged on the rear longitudinal beam supporting device along a first direction to clamp the rear longitudinal beam (2) in the first direction; Wherein, the second adjustment mechanism and the third adjustment mechanism are both movably arranged on the rear longitudinal beam support device along a second direction, the second direction is perpendicular to the bottom plate (10), and the first direction is perpendicular to the second direction; and / or, The lower gantry beam fixing mechanism (23) comprises a second positioning pin, a third positioning pin and a lower gantry beam positioning seat, the lower gantry beam positioning seat is fixed on the bottom plate (10), the second positioning pin and the third positioning pin are detachably connected to the lower gantry beam positioning seat, the second positioning pin is arranged along the third direction, the third positioning pin is arranged along the second direction, the second positioning pin is used to be inserted into the second positioning hole of the lower gantry beam (3), and the third positioning pin is used to be inserted into the third positioning hole of the lower gantry beam (3), so that the lower gantry beam (3) is installed on the lower gantry beam positioning seat; wherein the second direction is perpendicular to the bottom plate (10), and the third direction is perpendicular to the second direction; and / or, The front longitudinal beam fixing mechanism (24) comprises a front longitudinal beam supporting device, a fourth adjusting mechanism and a third clamping mechanism, the front longitudinal beam supporting device being fixed on the bottom plate (10), the fourth adjusting mechanism being arranged on the front longitudinal beam supporting device and contacting the front longitudinal beam (4) to support the front longitudinal beam (4), and the third clamping mechanism being movably arranged on the front longitudinal beam supporting device along a first direction to clamp the front longitudinal beam (4) in the first direction; The fourth adjustment mechanism is movably arranged on the front longitudinal beam support device along a second direction, the second direction is perpendicular to the bottom plate (10), and the first direction is perpendicular to the second direction.

3. A frame assembly welding method, characterized in that: The frame assembly welding method is used to weld a frame using the frame assembly welding tooling according to claim 1 or 2, and the method comprises: Mounting the middle cross beam (1) of the frame to the middle cross beam fixing mechanism (21) on the bottom plate (10); Mounting the rear longitudinal beam (2) of the vehicle frame to the rear longitudinal beam fixing mechanism (22) on the bottom plate (10) so that a first welding gap (101) exists between the rear longitudinal beam (2) and the middle cross beam (1) on the middle cross beam fixing mechanism (21); The lower gantry beam (3) of the vehicle frame is mounted on the lower gantry beam fixing mechanism (23) on the bottom plate (10) so that a second welding gap (102) is formed between the lower gantry beam (3) and the rear longitudinal beam (2) on the rear longitudinal beam fixing mechanism (22); The front longitudinal beam (4) of the vehicle frame is mounted to the front longitudinal beam fixing mechanism (24) on the bottom plate (10) so that a third welding gap (103) exists between the front longitudinal beam (4) and the lower gantry beam (3) on the lower gantry beam fixing mechanism (23); The middle cross beam (1) and the rear longitudinal beam (2) are welded together to fill the first welding gap (101), the rear longitudinal beam (2) and the lower gantry beam (3) are welded together to fill the second welding gap (102), and the front longitudinal beam (4) and the lower gantry beam (3) are welded together to fill the third welding gap (103); The welds formed after the first welding gap (101), the second welding gap (102) and the third welding gap (103) are welded and filled are insulated.

4. The frame assembly welding method according to claim 3, characterized in that: The method further comprises: The main beam (5) of the vehicle frame is mounted on the main beam fixing mechanism (25) on the bottom plate (10) so that a fourth welding gap (104) exists between the main beam (5) and the front longitudinal beam (4) on the front longitudinal beam fixing mechanism (24); Mounting the rear cross beam (6) of the vehicle frame to the rear cross beam fixing mechanism (26) on the bottom plate (10) so that a fifth welding gap (105) exists between the rear cross beam (6) and the rear longitudinal beam (2) on the rear longitudinal beam fixing mechanism (22); The upper gantry beam (7) of the vehicle frame is mounted on the upper gantry beam fixing mechanism (27) on the bottom plate (10) so that a sixth welding gap (106) exists between the upper gantry beam (7) and the lower gantry beam (3) on the lower gantry beam fixing mechanism (23); The main beam (5) and the front longitudinal beam (4) are welded together to fill the fourth welding gap (104), the tail cross beam (6) and the rear longitudinal beam (2) are welded together to fill the fifth welding gap (105), and the upper gantry beam (7) and the lower gantry beam (3) are welded together to fill the sixth welding gap (106); The welds formed after the fourth welding gap (104), the fifth welding gap (105) and the sixth welding gap (106) are filled and welded are insulated.

5. The frame assembly welding method according to claim 4, characterized in that: The main beam fixing mechanism (25) for mounting the main beam (5) on the bottom plate (10) comprises: placing the main beam (5) on a main beam supporting device and docking the main beam (5) with the front longitudinal beam (4); Moving the fifth adjustment mechanism along the second direction to adjust the height from the main beam (5) to the bottom plate (10); The tail cross beam fixing mechanism (26) for mounting the tail cross beam (6) on the bottom plate (10) comprises: placing the tail cross beam (6) on a tail cross beam positioning seat and docking the tail cross beam (6) with the rear longitudinal beam (2); Inserting a fourth positioning pin into the fourth positioning hole of the tail cross beam (6) and the tail cross beam positioning seat, and inserting a fifth positioning pin into the fifth positioning hole of the tail cross beam (6) and the tail cross beam positioning seat; Inserting the second clamping block into the fifth positioning pin and abutting against the tail crossbeam positioning seat, and abutting the tail crossbeam (6) against the side of the second clamping block away from the tail crossbeam positioning seat; Moving the fourth clamping mechanism along the first direction to clamp the tail crossbeam (6); The upper gantry beam fixing mechanism (27) for mounting the upper gantry beam (7) on the base plate (10) comprises: placing the upper gantry beam (7) on an upper gantry beam positioning seat and docking the upper gantry beam (7) with the lower gantry beam (3); Inserting a sixth positioning pin into a sixth positioning hole of the upper gantry beam (7) and the upper gantry beam positioning seat; Insert the third clamping block into the sixth positioning pin and abut against the upper gantry beam positioning seat, and abut the upper gantry beam (7) against the side of the third clamping block away from the upper gantry beam positioning seat; Moving the fifth clamping mechanism along the third direction to clamp the upper gantry beam (7); The second direction is perpendicular to the bottom plate (10), and the first direction, the second direction and the third direction are perpendicular to each other.

6. The vehicle frame assembly welding method according to any one of claims 3 to 5, characterized in that: The method of mounting the rear longitudinal beam (2) of the vehicle frame to the rear longitudinal beam fixing mechanism (22) on the bottom plate (10) so that a first welding gap (101) exists between the rear longitudinal beam (2) and the middle cross beam (1) on the middle cross beam fixing mechanism (21), comprises: Mounting two rear longitudinal beams (2) of the vehicle frame to a rear longitudinal beam fixing mechanism (22) on the bottom plate (10) so that two first welding gaps (101) are formed between the two rear longitudinal beams (2) and the middle cross beam (1) on the middle cross beam fixing mechanism (21); The step of welding the middle cross beam (1) and the rear longitudinal beam (2) together to fill the first welding gap (101) comprises: Welding the middle cross beam (1) and the two rear longitudinal beams (2) together respectively to fill the two first welding gaps (101); Wherein, the two first welding gaps (101) are welded simultaneously; The method of mounting the lower gantry beam (3) of the vehicle frame to the lower gantry beam fixing mechanism (23) on the bottom plate (10) so that a second welding gap (102) exists between the lower gantry beam (3) and the rear longitudinal beam (2) on the rear longitudinal beam fixing mechanism (22), comprises: The lower gantry beam (3) of the vehicle frame is mounted on the lower gantry beam fixing mechanism (23) on the bottom plate (10), so that two of the second welding gaps (102) are provided between the lower gantry beam (3) and the two rear longitudinal beams (2) on the rear longitudinal beam fixing mechanism (22); The step of welding the rear longitudinal beam (2) and the lower gantry beam (3) together to fill the second welding gap (102) comprises: The lower gantry beam (3) and the two rear longitudinal beams (2) are respectively welded together to fill the two second welding gaps (102); wherein two of the second welding gaps (102) are welded simultaneously; The method of mounting the front longitudinal beam (4) of the vehicle frame to the front longitudinal beam fixing mechanism (24) on the bottom plate (10) so that a third welding gap (103) exists between the front longitudinal beam (4) and the lower gantry beam (3) on the lower gantry beam fixing mechanism (23), comprises: Mounting the two front longitudinal beams (4) of the vehicle frame to the front longitudinal beam fixing mechanism (24) on the bottom plate (10) so that two third welding gaps (103) are provided between the two front longitudinal beams (4) and the lower gantry beam (3) on the lower gantry beam fixing mechanism (23); The step of welding the front longitudinal beam (4) and the lower gantry beam (3) together to fill the third welding gap (103) comprises: Welding the two front longitudinal beams (4) and the lower gantry beam (3) together to fill the two third welding gaps (103); Wherein, the two third welding gaps (103) are welded simultaneously; and / or, Before welding and filling the first welding gap (101), the second welding gap (102) and the third welding gap (103), the method further comprises: Obtaining the theoretical position relationship of the frame; Using a laser tracking device to detect the actual position relationship of the frame; When the actual positional relationship is consistent with the theoretical positional relationship, positioning welding is performed on at least one of the first welding gap (101), the second welding gap (102) and the third welding gap (103).

7. The frame assembly welding method according to claim 5, characterized in that: Welding to fill the first welding gap (101), the second welding gap (102), the third welding gap (103), the fourth welding gap (104), the fifth welding gap (105) and the sixth welding gap (106) comprises: Firstly welding to fill the first welding gap (101), the second welding gap (102), the third welding gap (103) and the fifth welding gap (105); Re-welding to fill the sixth welding gap (106); Finally welding to fill the fourth welding gap (104); wherein the first welding gap (101), the second welding gap (102), the third welding gap (103), the fourth welding gap (104), the fifth welding gap (105) and the sixth welding gap (106) are all welded at least twice, and the welding starting points of the at least two weldings are different; and / or, Welding the first welding gap (101), the second welding gap (102) and the fifth welding gap (105) using a first welding mode; Welding the third welding gap (103) and the fourth welding gap (104) using a second welding mode; welding the sixth welding gap (106) using a third welding mode; Among them, at least one welding parameter in the first welding mode, the second welding mode and the third welding mode is not completely the same; the welding parameters include welding current, arc voltage, welding speed, welding gas and shielding gas flow rate.

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