Auxiliary positioning tooling and method for front and back welding of roof

Abstract

The auxiliary positioning tooling and method for the forward and reverse welding of the roof described in the present invention proposes a new type of auxiliary tooling and use method based on the welding process of the aluminum profile of the roof, so as to meet the technical requirements of the welding of the forward and reverse welds, improve the straightness and dimensional accuracy of the overall welding of the long and large profiles of the roof, and take into account the saving of the welding processing site area of ​​large profiles and the versatility of the auxiliary tooling. The auxiliary positioning tooling for the forward and reverse welding of the roof includes a longitudinal bottom beam equipped with a linear guide rail, several main supporting beams that can be translated along the longitudinal bottom beam, a fixture body for supporting the aluminum profile of the roof and a flipping device for flipping the fixture body installed on the main supporting beam, and several transverse gathering devices that can also be translated along the longitudinal bottom beam for adjusting and ensuring the weld gap.

Description

Technical Field

[0001] The vehicle roof forward and reverse assembly welding auxiliary positioning tool and method thereof are suitable for assisting forward and reverse locking and positioning in the assembly welding process of long and large aluminum profiles, and belong to the field of rail vehicle manufacturing and processing. Background Art

[0002] With the rapid development of rail vehicle industrialization, the types of rail vehicles are increasing, and the appearance characteristics of the models tend to be beautiful and streamlined. The increase in the number of models undoubtedly requires more and more corresponding matching welding tooling in manufacturing. At the same time, the application of aluminum alloy profiles for rail vehicle bodies requires higher and higher requirements for the welding accuracy of the body frame.

[0003] At present, there are many types of rail vehicle roofs, and each type has different sizes. The assembly and welding of the roofs requires a lot of tooling and sites. How to optimize the existing tooling, realize modular assembly and processing, and reduce site occupation is particularly important. For example, the roofs of existing high-speed trains generally use aluminum alloy profile splicing structures. Due to the limited production level of existing aluminum profile manufacturers, the roof section is usually composed of 5 to 7 sections of aluminum profiles that are plugged in and welded. The roof aluminum profile welding process generally includes reverse positioning splicing assembly and welding, lifting and flipping to the right position after welding, and finally right position positioning welding.

[0004] For example, the domestic patent application with the following content disclosed in advance, application number 201911198338.1, named roof front and back assembly welding tooling, includes two sets of front and back tooling, both of which include multiple large standard modules that are symmetrical and parallel, and the large standard modules include symmetrically designed flat top and dome modules, and the flat top module is arranged in the middle; the flat top and dome modules of the forward tooling both include side beam clamping devices, support beams and profiling frames, the side beam clamping devices are arranged on both sides of the profiling frames to fix the front and side surfaces of the forward side beams of the roof, and the profiling frames are designed according to the forward contour of the roof; the flat top and dome modules of the reverse tooling both include edge clamping devices, support frames and multiple adjustable profiling blocks, the edge clamping devices are arranged on both sides to clamp the reverse side beams of the roof, the support frames are designed according to the contour of the reverse roof, and the adjustable profiling blocks are protruding from the upper end surface of the support frame, and the height is adjusted according to the different deformation amounts of the reverse roof.

[0005] The solution disclosed in the above-mentioned prior application includes sequentially transferring the roof to different positions for welding, which occupies a large space, has a complex welding process, and is difficult to accurately control the welding quality. Moreover, since the curvature of the roof of different models varies, the corresponding welding tooling becomes a one-to-one special tooling, and multiple sets of positioning tooling are required, which not only has a high manufacturing cost, but also increases the difficulty of processing the corresponding tooling molds. It is not conducive to improving the manufacturing versatility and modularity of tooling design.

[0006] In view of this, this application is hereby filed. Summary of the invention

[0007] The auxiliary positioning tooling and method for the positive and negative assembly welding of the roof described in the present application aims to solve the problems existing in the above-mentioned prior art and propose a new auxiliary positioning tooling and auxiliary positioning method for the positive and negative assembly welding of the roof, so as to achieve the positive and negative welding of roof aluminum profiles of various models and structures in sequence on the same station through the positive and negative positioning tooling, improve the stability in the positive and negative positioning process, and realize the technical requirements of taking into account the structures of different models, rapid adjustment and precise positioning, so as to meet the requirements of alternating production of different models.

[0008] To achieve the above purpose, the roof positive and negative position assembly welding auxiliary positioning tooling includes a set of longitudinal bottom beams installed with linear guide rails, a plurality of main support beams spanning and movably connected to the linear guide rails, and a transverse gathering device;

[0009] The main support beam comprises a base beam, two side slider mounting plates arranged at the bottom of the base beam to achieve sliding connection with the linear guide rail, a clamp body arranged at the top of the base beam and used to carry the roof profile, and a turning device arranged at the side parts of both sides of the base beam;

[0010] The fixture body is composed of a fixture base and a positive and negative position clamp installed on the foundation beam, and a negative position nylon integral template and a positive position support module respectively connected to the fixture base; the negative position nylon integral template and the positive position support module are relatively arranged on one side of the fixture base, and both are connected to the cylinder of the flip device; the positive and negative position clamps are installed on both lateral ends of the fixture base;

[0011] The flipping device consists of a cylinder, a hinge and a repeating positioning block; the inverted nylon integral template and the positive support module are respectively connected to the fixture base through hinges; the cylinder is installed on the side of the basic beam, and the driving end of the cylinder is connected to the inverted nylon integral template and the positive support module.

[0012] Furthermore, the repeating positioning block is fixedly connected to the fixture base, and the repeating positioning block is assembled with the square cutouts arranged on the reverse nylon integral template and the positive support module by transition fit.

[0013] Furthermore, the hinge comprises a hinge base part and a hinge rotating part which are interconnected by a pin shaft, and the relative action surfaces of the hinge base part and the hinge rotating part are both vertical positioning surfaces; the hinge base part and the fixture base seat are fixed by bolts, and the hinge rotating part and the reverse nylon integral template, or the positive support module are fixed by bolts; the hinge rotating part is also connected to the end of the driving shaft of the cylinder by a pin shaft.

[0014] Furthermore, the lateral gathering device comprises a gathering beam spanning and movably connected to the linear guide rail, a spiral screw device and a gathering lateral positioning seat installed on the gathering beam, and a gathering contoured nylon block arranged on the spiral screw device.

[0015] Furthermore, the upright support module is composed of an upright support base plate, a plurality of independent support seats movably connected to the upright support base plate, and an upright lateral positioning block located at the side end of the upright support base plate; the independent support seat is composed of a special nylon block and a special mounting seat, and the middle part of the special nylon block is a downward concave structure; the special nylon block is installed on the special mounting seat, and the special mounting seat is installed on the upright support base plate using fastening bolts.

[0016] Furthermore, the upright supporting base plate is provided with an oblong hole, and the special mounting seat is provided with an arc-shaped oblong hole.

[0017] Furthermore, an orthogonal lateral positioning block is mounted on each orthogonal supporting base plate and has a vertical lateral positioning surface.

[0018] Based on the structural design of the above-mentioned roof front and back welding auxiliary positioning tooling, the present application also proposes the following roof front and back welding auxiliary positioning method. It includes the following steps:

[0019] 1) Positioning of reverse surface tooling

[0020] Start the flipping device, and retract the positive support module through the cylinder flipping, and the positive support module flips vertically around the fixed axis of the hinge and falls down; at the same time, the reverse nylon integral template on the other side of the fixture base is flipped and ejected to a vertical positioning state through the cylinder on the other side, and the reverse nylon integral template is in the reverse surface support position;

[0021] The top of the reverse nylon integral template has a contour that matches the reverse arc surface of the roof aluminum profile processed by assembly welding. The reverse nylon integral template with the corresponding roof arc can be replaced according to different vehicle models;

[0022] 2) Auxiliary reverse surface welding

[0023] Lift and drop 5 to 7 sections of roof aluminum profiles in sequence, and use the overall arc shape of the reverse nylon integral template to splice and connect the sections of roof aluminum profiles. According to the gap size of the welds after splicing the sections of roof aluminum profiles, use the horizontal gathering device to gather and tighten the roof aluminum profiles to one side;

[0024] At this point, the reverse surface positioning of the roof aluminum profile is completed, and then the gantry-type automatic welding equipment is used to weld and spot-fix the longitudinal welds of the reverse roof, and the welding size is tested at the same time;

[0025] 3) Positioning of positive surface tooling

[0026] After the reverse welding of the roof aluminum profile is completed, open the positive and negative clamps, reverse the lateral gathering device to unlock the roof aluminum profile as a whole, and then lift the roof aluminum profile as a whole, and use the aerial turning machine to turn the roof aluminum profile from the reverse surface to the positive surface for standby;

[0027] The flipping device is started, and the reverse nylon integral template is flipped and retracted by the cylinder, and the reverse nylon integral template is flipped vertically around the fixed axis of the hinge and falls down; at the same time, the positive support module located on the other side of the fixture base is flipped and ejected to a vertical positioning state by the cylinder on the other side, and the positive support module is in the positive surface support position;

[0028] The independent support base can be adjusted up and down, left and right, and rotated to meet the anti-deformation requirements of the roof welding, and the height, size, and angle can be adjusted accordingly to meet the needs of the roof arc of different models;

[0029] 4) Auxiliary positive surface welding

[0030] The roof aluminum profile that has been flipped in the air to the positive plane is lifted and dropped down. With the help of the positioning function of the positive horizontal positioning block, the position of each section of the weld is aligned with each independent support seat. At this time, each independent support seat provides support force for the roof aluminum profile;

[0031] Then, the positive and negative clamps at both ends are used to clamp and fix the roof side beam profiles respectively, and the gantry-type automatic welding equipment is used to weld the longitudinal welds of the roof. At the same time, the welding reverse deformation effect on the overall curvature of the roof is achieved. The reverse deformation amount can be adjusted according to the overall change amount after welding, and the welding size detection is carried out during the process;

[0032] 5) Post-weld treatment

[0033] After the positive surface welding of the roof aluminum profile is completed, open the positive and negative clamps at both ends, and then unlock the roof aluminum profile as a whole horizontally, and then lift the roof aluminum profile as a whole and transfer it to the post-welding processing process.

[0034] In summary, the roof front and back welding auxiliary positioning tool and method described in this application have the following advantages:

[0035] 1. By adopting the longitudinal linear guide mechanism, the longitudinal position support point of the roof of different models can be adjusted;

[0036] 2. The use of nylon integral template support ensures the welding accuracy of the roof curvature. At the same time, its quick replacement feature enables the same tooling to weld the roofs of different models;

[0037] 3. In terms of anti-deformation control, several independent support modules are used to provide anti-deformation support for each weld position of the roof cross section, and the deformation amount and angle are adjustable; at the same time, the position of the independent support module is adjustable, and the position can be adjusted for the roof of different models;

[0038] 4. The introduction of the flip device realizes the alternating switching between the positive and reverse positions of the roof, and realizes the whole process of positive and reverse welding of the roof on a set of tooling, saving tooling production costs and welding costs, reducing the workpiece transfer process, and further saving the floor space of tooling and workstations;

[0039] 5. The lateral gathering device adopts a modular design, and its contoured nylon blocks can be quickly replaced according to different vehicle models to meet the needs of different vehicle models. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The design points of this application are now described in detail with reference to the following drawings.

[0041] Figure 1 is a schematic diagram of a clamping roof using the present application;

[0042] Figure 2 It is a structural schematic diagram of the auxiliary positioning tooling for front and back welding of the roof described in the present application;

[0043] Figure 3 yes Figure 2 A magnified schematic diagram of part A in FIG.

[0044] Figure 4 is a comparative schematic diagram of the process of clamping the roof of the main supporting crossbeam on the reverse surface;

[0045] Figure 5 yes Figure 4 AA section diagram and flip comparison diagram of the flip device;

[0046] Figure 6 yes Figure 4 The enlarged schematic diagram of part B and the positioning principle diagram of the flip device;

[0047] Figure 7 is a schematic structural diagram of the lateral gathering device;

[0048] Figure 8 is a comparative schematic diagram of the process of clamping the roof of the main supporting crossbeam on the positive plane;

[0049] Fig. 9 yes Figure 8 The middle C part is an enlarged schematic diagram of the structure of the independent support seat;

[0050] Fig.10 It is a schematic diagram of component decomposition and assembly of the independent support base;

[0051] Fig.11 A schematic diagram of the up, down, left, right and rotation adjustment of the independent support base;

[0052] Fig.12 for Figure 8 The enlarged structural diagram of the middle D part;

[0053] Fig.13 for Figure 6 A schematic diagram of the movement of the hinge mechanism of the flip device shown;

[0054] In the above drawings, there are longitudinal bottom beam 1, main supporting beam 2, clamp body 3, flipping device 4, lateral gathering device 5, slider mounting plate 6, base beam 7, clamp base seat 8, reverse nylon integral template 9, positive support module 10, positive and reverse clamp 11, hinge 12, independent support seat 13, special nylon block 14, positive lateral positioning block 15, cylinder 16, repeated positioning block 17, screw device 18, gathering contoured nylon block 19, gathering lateral positioning seat 20, gathering beam 21, linear guide 100, special mounting seat 101, positive support base plate 102, incision 103, tightening screw 104, oblong hole 105, arc oblong hole 106, hinge base part 121, hinge rotating part 122, and roof aluminum profile 200. DETAILED DESCRIPTION

[0055] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0056] Embodiment 1, as Figures 1 to 3 As shown, the auxiliary positioning tool for front and back position welding of the roof described in the present application comprises a set of longitudinal bottom beams 1 installed with a linear guide rail 100, a plurality of main support beams 2 spanning and movably connected to the linear guide rail 100, and a plurality of transverse gathering devices 5. The main support beams 2 can move longitudinally along the linear guide rail 100, so as to realize positioning support and locking of the roof aluminum profile in the front and back positions; the transverse gathering device 5 can move longitudinally along the linear guide rail 100, so as to realize the adjustment of the spacing in the transverse direction to adapt to the adjustment of the weld gap.

[0057] The main support beam 2 includes a base beam 7, two side slider mounting plates 6 arranged at the bottom of the base beam 7 to achieve sliding connection with the linear guide rail 100, a fixture body 3 arranged at the top of the base beam 7 and used to carry the roof profile, and a flip device 4 arranged at the side parts of the two sides of the base beam 7. The flip device 4 is drivingly connected to the fixture body 3 to drive the fixture body 3 to flip.

[0058] like Figure 4 and Figure 5As shown, the fixture body 3 is composed of a fixture base 8 and a positive and negative position clamp 11 installed on the basic crossbeam 7, and a negative position nylon integral template 9 and a positive position support module 10 respectively connected to the fixture base 8. The negative position nylon integral template 9 and the positive position support module 10 are relatively arranged on one side of the fixture base 8, and both are connected to the cylinder 16 of the flipping device 4. The flipping device 4 can alternately flip the negative position nylon integral template 9 and the positive position support template 10 to achieve alternating use between the positive position and the negative position working surface; the positive and negative position clamp 11 is installed on the two lateral ends of the fixture base 8 to achieve the compression and positioning of the positive and negative position working surfaces of the roof profile.

[0059] The flipping device 4 is composed of a cylinder 16, a hinge 12 and a repeated positioning block 17. The reverse nylon integral template 9 and the positive support module 10 are respectively connected to the fixture base 8 through the hinge 12; a plurality of cylinders 16 are respectively installed on both sides of the base beam 7, and the driving end of the cylinder 16 is connected to the reverse nylon integral template 9 or the positive support module 10 to drive the reverse nylon integral template 9 or the positive support module 10 to flip back and forth vertically, that is, to achieve alternating use on the positive and reverse working surfaces.

[0060] like Figure 6 As shown, the repeating positioning block 17 is fixedly connected to the fixture base 8; the repeating positioning block 17 is an aluminum processed square part with high dimensional accuracy, and is assembled with the square cutouts 103 set on the reverse nylon integral template 9 and the positive support module 10 by transition fit. The function of the repeating positioning block 17 is that when the reverse nylon integral template 9 and the positive support module 10 are flipped back and forth vertically, the repeating positioning block 17 can ensure that the reverse nylon integral template 9 and the positive support module 10 are kept in close contact during flipping and provide rigid positioning support to prevent the parts from lateral movement, that is, it can ensure that the reverse nylon integral template 9 and the positive support module 10 are accurately positioned each time they are flipped, and maintain a stable vertical positioning state after flipping upwards, and can ensure long-term effectiveness.

[0061] Another example Fig.13 As shown, the hinge 12 has both the function of a rotating shaft and vertical positioning. It has a hinge base part 121 and a hinge rotating part 122 which are interconnected by a pin shaft. The relative working surfaces of the hinge base part 121 and the hinge rotating part 122 are both vertical positioning surfaces; the hinge base part 121 and the clamp base seat 8 are fixed by bolts, and the hinge rotating part 122 and the reverse nylon integral template 9 or the positive support module 10 are fixed by bolts; and the hinge rotating part 122 is also connected to the end of the driving shaft of the cylinder 16 by a pin shaft.

[0062] When the cylinder 16 drives to lift the inverted nylon integral template 9 or the upright support module 10, the hinge rotating part 122 rotates up to the highest point. At this time, the hinge base part 121 and the hinge rotating part 122 abut against each other to achieve hard contact between the relative working surfaces of the two. At this time, the hinge rotating part 122 maintains a vertical positioning state, thereby achieving the inverted nylon integral template 9 or the upright support module 10 to maintain a stable vertical positioning state relative to the fixture base 8.

[0063] like Figure 2 and Figure 7 As shown, the lateral gathering device 5 is used to gather the butt welds of several aluminum profiles on the roof and can adjust and ensure the weld gap, which includes a gathering crossbeam 21 that spans and is movably connected to the linear guide rail 100, a screw screw device 18 and a gathering cross-positioning seat 20 installed on the gathering crossbeam 21, and a gathering contoured nylon block 19 arranged on the screw screw device 18. The screw screw device 18 provides power for the lateral movement of the gathering contoured nylon block 19, and the gathering contoured nylon block 19 can be replaced accordingly according to different vehicle models to meet the auxiliary positioning needs of the roof assembly of different vehicle models.

[0064] like Figure 8 As shown, the upright support module 10 is composed of an upright support base plate 102, several independent support seats 13 movably connected to the upright support base plate 102, and an upright lateral positioning block 15 located at the side end of the upright support base plate 102. Among them, the independent support seat 13 is in direct contact with the roof aluminum profile 200, and is used to support several welding seam positions on the upright surface of the roof. The independent support seat 13 can be adjusted up and down, left and right, and rotated to meet the anti-deformation requirements of the roof welding, and can adjust the height and angle accordingly to meet the needs of the roof arc surface of different models.

[0065] like Fig. 9 and Fig.10 As shown, the independent support seat 13 is composed of a special nylon block 14 and a special mounting seat 101. Among them, the special nylon block 14 is directly in contact with the roof aluminum profile, and the support position is at the weld position. Since the cross-sectional structural strength of the aluminum profile at the weld position is the best, the support point is selected here. At the same time, considering the weld bulge problem, the middle part of the special nylon block 14 is a downward concave structure to avoid the weld bulge. The special nylon block 14 is installed on the special mounting seat 101, and the special mounting seat 101 is installed on the positive support base plate 102 using fastening bolts.

[0066] like Fig.11As shown, the independent support seat 13 can be adjusted up and down, left and right, and rotated to meet the anti-deformation requirements of the roof welding, and the height size and angle can be adjusted accordingly to meet the needs of the roof arc surface of different models. Specifically, the special nylon block 14 is installed on the special mounting seat 101, and the tightening screw 104 on the special mounting seat 101 supports the bottom of the special nylon block 14. When the tightening screw 104 is adjusted, the special nylon block 14 can be driven to move up and down. The function of several special nylon blocks 14 can cope with the adjustment of the welding anti-deformation rebound amount of the overall curvature of the roof aluminum profile. When the special mounting seat 101 moves along the oblong hole 105 set on the positive support base plate 102, it indirectly causes the special nylon block 14 to move horizontally left and right, which can cope with the adjustment of the support point position caused by the different weld positions of different models. When the dedicated mounting seat 101 rotates along its own arc-shaped oblong hole 106, the dedicated nylon block 14 is indirectly rotated in a small range, which can cope with the adjustment of the supporting surface angle caused by the different overall curvatures of different vehicle models.

[0067] like Fig.12 As shown, the positive lateral positioning block 15 is installed on each positive supporting base plate 102, which has a vertical lateral positioning surface. Several positive lateral positioning blocks 15 can jointly provide the longitudinal and higher straightness of the overall assembly welding auxiliary positioning tooling, so as to be used for the lateral positioning of the positive roof aluminum profile. After the reverse surface welding of the roof aluminum profile 200 is completed, the whole is lifted and flipped in the air to the positive surface state. When it is lifted and dropped, it needs to be repositioned to ensure the overall straightness of the roof aluminum profile 200. At this time, the side end of the roof aluminum profile 200 is aligned with the positive lateral positioning block 15, and at the same time, the weld positions of each section are aligned one by one with the above-mentioned independent support seat 13.

[0068] Based on the structural design of the above-mentioned roof front and back welding auxiliary positioning tooling, the present application also proposes the following roof front and back welding auxiliary positioning method.

[0069] The roof aluminum profile 200 used for auxiliary welding is made by welding 5 to 7 sections of aluminum profiles. The welding process of the roof aluminum profile generally includes:

[0070] Use the reverse tooling to position the assembly + positioning welding stage;

[0071] The stage of welding the reverse long strip weld with the help of gantry automatic welding equipment;

[0072] Lift after welding + flip to the upright position with the help of an aerial flip machine;

[0073] Lifting to the stage of welding long strip welds in the correct position of tooling;

[0074] Post-weld processing stage.

[0075] In the above welding process, the following forward and reverse welding auxiliary positioning method is performed using the roof forward and reverse welding auxiliary positioning tool described in this application:

[0076] 1) Positioning of reverse surface tooling

[0077] The flipping device 4 is started, and the upright support module 10 is flipped and retracted by the cylinder 16, and the upright support module 10 is flipped and dropped vertically around the fixed axis of the hinge 12; at the same time, the reverse nylon integral template 9 located on the other side of the fixture base 8 is flipped and ejected to a vertical positioning state by the cylinder 16 on the other side, and the reverse nylon integral template 9 is in the reverse surface support position;

[0078] The top of the reverse nylon integral template 9 has a contour that matches the reverse arc surface of the roof aluminum profile processed by assembly welding, and the reverse nylon integral template 9 of the corresponding roof arc can be replaced according to different vehicle models;

[0079] 2) Auxiliary reverse surface welding

[0080] 5 to 7 sections of roof aluminum profiles are hoisted and dropped down in sequence, and the sections of roof aluminum profiles are spliced ​​and connected with each other by means of the overall arc shape of the reverse nylon integral template 9. According to the weld gap size of each section of roof aluminum profile after splicing, the roof aluminum profile is gathered and tightened to one side by means of the transverse gathering device 5.

[0081] Specifically, the spiral screw device 18 is used to move the gathering contoured nylon block 19 laterally toward the side of the gathering lateral positioning seat 20 so as to press the gathering contoured nylon block 19 against the side end of the roof side beam profile; after gathering and tightening, the positive and negative position clamps 11 at both ends of the clamp base seat 8 are used to clamp and fix the roof side beam profile.

[0082] At this point, the reverse surface positioning of the roof aluminum profile is completed, and then the gantry-type automatic welding equipment is used to weld and spot-fix the longitudinal welds of the reverse roof, and the welding size detection is carried out at the same time.

[0083] 3) Positioning of positive surface tooling

[0084] After the reverse welding of the roof aluminum profile is completed, the positive and negative clamps 11 are opened, and the lateral gathering device 5 is reversed to realize the lateral unlocking of the roof aluminum profile as a whole, and then the roof aluminum profile is hoisted as a whole, and the roof aluminum profile is flipped from the reverse surface to the positive surface by means of the aerial flipping machine to stand by;

[0085] The flipping device 4 is started, and the reverse nylon integral template 9 is flipped and retracted by the cylinder 16, and the reverse nylon integral template 9 is flipped and dropped vertically around the fixed axis of the hinge 12; at the same time, the positive support module 10 located on the other side of the fixture base 8 is flipped and ejected to a vertical positioning state by the cylinder 16 on the other side, and the positive support module 10 is in the positive surface support position;

[0086] The independent support seat 13 is adjusted up and down, left and right, and rotated to meet the anti-deformation requirements of the roof welding, and the height, size, and angle can be adjusted accordingly to meet the needs of the roof arc surface of different models.

[0087] Specifically, by adjusting the tightening screw 104 at the bottom of the special mounting seat 101, the special nylon block 14 is driven to move up and down, so as to cope with the adjustment of the welding anti-deformation rebound amount of the overall curvature of the roof aluminum profile 200; the special mounting seat 101 is moved along the oblong hole 105 on the positive support base plate 102 to drive the special nylon block 14 to move left and right, so as to cope with the adjustment of the support point position caused by the different weld positions of different vehicle models; the special mounting seat 101 is rotated along its own arc-shaped oblong hole 106 to drive the special nylon block 14 to rotate slightly, so as to cope with the adjustment of the support surface angle caused by the different overall curvatures of different vehicle models.

[0088] 4) Auxiliary positive surface welding

[0089] The roof aluminum profile that has been flipped in the air to the positive plane is lifted and dropped down, and with the help of the positioning function of the positive horizontal positioning block 15, the position of each section of the weld is aligned with each independent support seat 13, and at this time each independent support seat 13 provides support force for the roof aluminum profile;

[0090] The positive transverse positioning block 15 has a vertical lateral positioning surface. Several positive transverse positioning blocks 15 can jointly provide the longitudinal and high straightness of the overall assembly welding auxiliary positioning tooling, so as to be used for the lateral positioning of the positive roof aluminum profile. When the roof aluminum profile 200 located on the positive surface is lifted and dropped, the side end of the roof aluminum profile 200 is aligned with the positive transverse positioning block 15 to ensure the overall straightness of the roof aluminum profile 200. At this time, the weld positions of each section of the roof aluminum profile 200 are aligned with the independent support seat 13 one by one.

[0091] Then, the positive and negative clamps 11 at both ends are used to clamp and fix the roof side beam profile respectively, and then the longitudinal welds of the roof are welded with the help of gantry automatic welding equipment, while realizing the welding reverse deformation effect on the overall curvature of the roof. The reverse deformation amount can be adjusted according to the overall change after welding, and the welding size detection is carried out during the process.

[0092] 5) Post-weld treatment

[0093] After the front surface welding of the roof aluminum profile is completed, the front and back clamps 11 at both ends are opened to unlock the roof aluminum profile as a whole horizontally, and then the roof aluminum profile is hoisted as a whole and transferred to the post-welding processing step.

[0094] At this point, the entire roof aluminum profile positive and negative position welding auxiliary positioning and welding process is completed.

[0095] As described above, similar technical solutions can be derived from the solutions provided in the accompanying drawings and embodiments. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A roof front and back welding auxiliary positioning tool, characterized by: Includes a set of linear guide rails A longitudinal bottom beam, a plurality of main supporting beams spanning and movably connected to the linear guide rail, and a transverse gathering device; The main support beam comprises a base beam, two side slider mounting plates arranged at the bottom of the base beam to achieve sliding connection with the linear guide rail, a clamp body arranged at the top of the base beam and used to carry the roof profile, and a turning device arranged at the side parts of both sides of the base beam; The fixture body is composed of a fixture base and a positive and negative position clamp installed on the foundation beam, and a negative position nylon integral template and a positive position support module respectively connected to the fixture base; the negative position nylon integral template and the positive position support module are relatively arranged on one side of the fixture base, and both are connected to the cylinder of the flip device; the positive and negative position clamps are installed on both lateral ends of the fixture base; The flipping device is composed of a cylinder, a hinge and a repeated positioning block; the reverse nylon integral template and the positive support module are respectively connected to the fixture base through hinges; the cylinder is installed on the side of the basic beam, and the driving end of the cylinder is connected to the reverse nylon integral template and the positive support module; The repeating positioning block is fixedly connected to the fixture base, and the repeating positioning block is assembled with the square cutouts arranged on the reverse nylon integral template and the positive support module by transition fit; The hinge comprises a hinge base part and a hinge rotating part connected to each other by a pin shaft, and the opposing action surfaces of the hinge base part and the hinge rotating part are both vertical positioning surfaces; the hinge base part and the fixture base seat are fixed by bolts, and the hinge rotating part and the reverse nylon integral template or the positive support module are fixed by bolts; the hinge rotating part is also connected to the end of the driving shaft of the cylinder by a pin shaft; The lateral gathering device comprises a gathering beam which spans and is movably connected to the linear guide rail, a screw screw device and a gathering lateral positioning seat which are installed on the gathering beam, and a gathering contoured nylon block which is arranged on the screw screw device; The upright support module is composed of an upright support base plate, several independent support seats movably connected to the upright support base plate, and an upright lateral positioning block located at the side end of the upright support base plate; the independent support seat is composed of a special nylon block and a special mounting seat, and the middle part of the special nylon block is a downward concave structure; the special nylon block is installed on the special mounting seat, and the special mounting seat is installed on the upright support base plate using fastening bolts.

2. The auxiliary positioning tool for front and back welding of the roof according to claim 1 is characterized by: The upright support base plate is provided with an oblong hole, and the special mounting seat is provided with an arc-shaped oblong hole.

3. The auxiliary positioning tool for front and back welding of the roof according to claim 2 is characterized by: An orthogonal lateral positioning block is mounted on each orthogonal support base plate and has a vertical lateral positioning surface.

4. A method for auxiliary positioning of front and back position welding of a vehicle roof using the auxiliary positioning tool for front and back position welding of a vehicle roof as described in any one of claims 1 to 3, characterized in that: The following steps are included: 1) Positioning of reverse surface tooling Start the flipping device, and retract the positive support module through the cylinder flipping, and the positive support module flips vertically around the fixed axis of the hinge and falls down; at the same time, the reverse nylon integral template on the other side of the fixture base is flipped and ejected to a vertical positioning state through the cylinder on the other side, and the reverse nylon integral template is in the reverse surface support position; The top of the reverse nylon integral template has a contour that matches the reverse arc surface of the roof aluminum profile processed by assembly welding. The reverse nylon integral template with the corresponding roof arc can be replaced according to different vehicle models; 2) Auxiliary reverse surface welding 5 to 7 sections of roof aluminum profiles are hoisted and dropped down in sequence, and each section of roof aluminum profiles is spliced ​​and connected with each other by means of the overall arc shape of the reverse nylon integral template; according to the weld gap size after the splicing of each section of roof aluminum profile, the roof aluminum profile is gathered and tightened to one side by means of a transverse gathering device; At this point, the reverse surface positioning of the roof aluminum profile is completed, and then the gantry-type automatic welding equipment is used to weld and spot-fix the longitudinal welds of the reverse roof, and the welding size is tested at the same time; 3) Positioning of positive surface tooling After the reverse welding of the roof aluminum profile is completed, open the positive and negative clamps, reverse the lateral gathering device to unlock the roof aluminum profile as a whole, and then lift the roof aluminum profile as a whole, and use the aerial turning machine to turn the roof aluminum profile from the reverse surface to the positive surface for standby; The flipping device is started, and the reverse nylon integral template is flipped and retracted by the cylinder, and the reverse nylon integral template is flipped vertically around the fixed axis of the hinge and falls down; at the same time, the positive support module located on the other side of the fixture base is flipped and ejected to a vertical positioning state by the cylinder on the other side, and the positive support module is in the positive surface support position; The independent support base can be adjusted up and down, left and right, and rotated to meet the anti-deformation requirements of the roof welding, and the height, size, and angle can be adjusted accordingly to meet the needs of the roof arc of different models; 4) Auxiliary positive surface welding The roof aluminum profile that has been flipped in the air to the positive plane is lifted and dropped down. With the help of the positioning function of the positive horizontal positioning block, the position of each section of the weld is aligned with each independent support seat. At this time, each independent support seat provides support force for the roof aluminum profile; Then, the positive and negative clamps at both ends are used to clamp and fix the roof side beam profiles respectively, and the gantry-type automatic welding equipment is used to weld the longitudinal welds of the roof. At the same time, the welding reverse deformation effect on the overall curvature of the roof is achieved. The reverse deformation amount can be adjusted according to the overall change amount after welding, and the welding size detection is carried out during the process; 5) Post-weld treatment After the positive surface welding of the roof aluminum profile is completed, open the positive and negative clamps at both ends, and then unlock the roof aluminum profile as a whole horizontally, and then lift the roof aluminum profile as a whole and transfer it to the post-welding processing process.

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