Car body spot welding truss for debugging of welding assembly line

Abstract

The invention relates to the field of vehicle body welding production lines, in particular to a vehicle body spot welding truss for welding line debugging. A rolling structure and a spot welding system are arranged on the gantry frame; the rolling structure comprises a plurality of rolling mechanisms arranged on the gantry frame; the spot welding system comprises a spot welding unit and a sliding rail beam unit. The spot welding unit is connected to the gantry frame through the sliding rail beam unit. The vehicle body spot welding truss disclosed by the invention is a vehicle body spot welding debugging system which is highly integrated and flexible to move, and the industrial problem that real working conditions cannot be verified in the early debugging stage of a traditional vehicle welding production line (especially a newly-built or exported production line) is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile body welding production line, in particular to a welding line debugging automobile body spot welding truss. BACKGROUND

[0002] In the automobile manufacturing industry, when building a new or exporting automobile body welding production line, the integrated manufacturer must fully test and verify the positioning accuracy of various equipment and tooling fixtures, the trajectory and parameters of the welding robot, and the coordination of the entire control system before the equipment is delivered.

[0003] The purpose of this process is to shorten the final installation and debugging period on site at the automobile host factory and reduce the technical risk and cost of on-site debugging.

[0004] Currently, the pre-debugging verification method commonly used in the industry has significant limitations due to hardware limitations.

[0005] The traditional method usually fixes the automobile body panels through positioning fixtures in the factory of the integrated manufacturer, and then uses carbon dioxide (CO2) gas shielded welding (arc welding) process to weld the panels instead of resistance spot welding process used in formal production, thereby simulating the assembly process of the white automobile body.

[0006] However, this traditional verification method has the following inherent defects:

[0007] Process misalignment, distorted verification results: CO2 arc welding and resistance spot welding are two completely different welding processes in terms of physical principles; arc welding is a fusion welding process with high and concentrated heat input, resulting in large welding thermal deformation; while spot welding is a resistance pressure welding process with rapid and concentrated heat input, different deformation mode.

[0008] Using arc welding for verification cannot truly reflect the working conditions during formal spot welding production, resulting in a mismatch between the verification results of fixture positioning accuracy and the actual situation, greatly reducing the reference value of early verification.

[0009] Cannot verify welding quality and parameters: Since an alternative process is used, it is impossible to verify and optimize the welding parameters (such as welding current, time, and electrode pressure) of formal spot welding, and it is also impossible to obtain the true welding quality.

[0010] After replacing the spot welding equipment on site at the host factory, a large amount of parameter debugging work is often required, which cannot achieve the purpose of advance verification.

[0011] Cannot test equipment accessibility and compatibility: the arc welding gun and the resistance spot welding clamp differ greatly in shape, weight, and operating space.

[0012] Traditional methods cannot test the interference between real spot welding tongs and complex body profiles, accessibility, and the matching state of welding tongs and controllers and other equipment.

[0013] Long on-site debugging period and great difficulty: due to the insufficient verification described above, a large number of potential problems (such as insufficient fixture precision, tong interference, and unreasonable parameters) are exposed during the final debugging at the automobile host factory, the debugging difficulty increases dramatically, the period is forced to be extended, and the demand for efficient and rapid integration of modern automobile manufacturing cannot be met.

[0014] The existing patent CN 109175648 A discloses a resistance spot welding method and system suitable for steel-aluminum body mixed production; however, it cannot be applied to the debugging of the body welding production line.

[0015] Therefore, in order to improve or solve at least one of the above technical problems, an auxiliary device is needed to assist in the debugging of the body welding production line. SUMMARY

[0016] The purpose of the present application is to provide a mobile body spot welding truss for welding line debugging.

[0017] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0018] A body spot welding truss for welding line debugging, comprising a gantry frame; the gantry frame is provided with a rolling structure and a spot welding system;

[0019] The rolling structure comprises a plurality of rolling mechanisms arranged on the gantry frame;

[0020] The spot welding system comprises a spot welding unit and a sliding rail beam unit;

[0021] The spot welding unit is connected to the gantry frame through the sliding rail beam unit.

[0022] The gantry frame comprises a column frame and a beam frame; the beam frame is provided with one column frame at each end, and each column frame is provided with at least two rolling mechanisms at the bottom;

[0023] The column frame is further provided with a placing unit at the end away from the beam frame, and the placing unit comprises a placing platform.

[0024] The spot welding unit comprises a spot welding structure; each spot welding structure comprises a tong mechanism and a controller mechanism; each tong mechanism comprises at least one tong; each controller mechanism comprises at least one welding controller; each tong is connected to the sliding rail beam unit through a balancer; and the welding controller is connected to the sliding rail beam unit through a suspension mechanism.

[0025] Each welding tongs is connected with corresponding welding controller through welding tongs cable; welding tongs cable connected with each welding tongs is connected on slide rail beam unit through balancer.

[0026] The slide rail beam unit comprises longitudinal beam unit and transverse beam unit;

[0027] The transverse beam unit is connected with transverse beam frame in gantry frame through longitudinal beam unit;

[0028] The longitudinal beam unit comprises a plurality of longitudinal beams which are distributed in parallel at intervals;

[0029] The transverse beam unit comprises a plurality of transverse beams which are distributed in parallel at intervals;

[0030] Each transverse beam is connected on transverse beam frame through at least two longitudinal beams.

[0031] The longitudinal beam is connected with transverse beam frame through hanging unit;

[0032] The hanging unit comprises lower hanging frame and upper hanging frame;

[0033] The lower hanging frame comprises hanging connecting plate and two lower hanging ear plates which are connected on hanging connecting plate at intervals;

[0034] The upper hanging frame comprises two upper hanging ear plates which are connected on hanging connecting plate at intervals;

[0035] The upper hanging ear plate is hung on transverse beam frame; the lower hanging ear plate is connected on longitudinal beam; the upper hanging ear plate and lower hanging ear plate are J-shaped in vertical section.

[0036] The transverse beam is connected with longitudinal beam through linkage unit;

[0037] The linkage unit comprises lower hanging frame and linkage component arranged on lower hanging frame;

[0038] The linkage component comprises linkage plate arranged on lower hanging frame; the linkage plate is provided with pulley part; the side surface and / or end surface of linkage plate is provided with pulley part; the longitudinal beam is provided with longitudinal beam hanging groove, and linkage plate is hung in longitudinal beam hanging groove through pulley part.

[0039] The transverse beam is connected with balancer through linkage component; the transverse beam is provided with transverse beam hanging groove, and linkage component is hung in transverse beam hanging groove through pulley part.

[0040] The transverse beam frame comprises two side main beams which are connected through a plurality of middle transverse beams; the side main beam and middle transverse beam are I-beams; the hanging unit in slide rail beam unit is hung on lower flange of middle transverse beam.

[0041] The spot welding system comprises two spot welding structures; the two spot welding structures are symmetrically distributed on the portal frame;

[0042] The controller mechanism in each spot welding structure is distributed on one end of the cross beam frame close to the column frame;

[0043] The welding controller is directly connected on the cross beam frame through the longitudinal beam;

[0044] The welding tong is connected on the cross beam frame through the transverse beam and the longitudinal beam;

[0045] The controller mechanisms in the two spot welding structures are symmetrically distributed on the cross beam frame; the symmetrically distributed controller mechanisms form a middle arrangement area; each welding tong mechanism is arranged in the middle arrangement area.

[0046] The present application has the advantages of:

[0047] The application discloses a body spot welding truss for welding line debugging.

[0048] The body spot welding truss disclosed by the application is a highly integrated and flexible body spot welding debugging system, and solves the industry pain point that a traditional automobile welding production line (especially a newly built or exported production line) cannot be verified under real working conditions in an early debugging stage; the application directly uses the same resistance spot welding process and equipment (welding tong and controller) as an official production line, so that trial production verification in an integrator factory can 100% restore real production working conditions in a workshop of an automobile manufacturer; under real spot welding pressure and process, the precision of a body fixture and a positioning mechanism can be exposed and solved in advance; qualified welding spots are directly obtained, the rationality of welding parameters (current, time and pressure) is verified, and welding quality is ensured; reachability of a welding tong and a complex profile of a body, interference and cooperative working conditions of all control equipment can be tested in advance. BRIEF DESCRIPTION OF DRAWINGS

[0049] The following briefly describes the content expressed by each drawing in the specification of the application and the marks in the drawings:

[0050] Figure 1 It is a structural schematic diagram of the first perspective of the application.

[0051] Figure 2 It is a structural schematic diagram of the second perspective of the application.

[0052] Figure 3 It is an axial side view of the connection between the portal frame and the slide rail beam unit in the application.

[0053] Figure 4 It is a structural schematic diagram of the slide rail beam unit in the application.

[0054] Figure 5It is a local structure diagram of the slide rail beam unit in the application.

[0055] Figure 6 It is a structure diagram of the linkage unit in the application.

[0056] Figure 7 It is a structure diagram of the slide rail beam unit in the application.

[0057] Figure 8 It is a structure diagram of the linkage unit in the application.

[0058] The marks in the above figures are as follows:

[0059] 1, gantry frame, 2, slide rail beam unit, 3, spot welding system, 5, rolling structure, 6, hanging unit, 7, lower hanging frame, 8, linkage component, 9, suspension mechanism, 11, column frame, 12, beam frame, 13, placement platform, 21, longitudinal beam, 22, transverse beam, 31, welding tongs, 32, welding controller, 33, welding tongs cable, 61, upper hanging frame, 71, hanging connecting plate, 72, lower hanging ear plate, 81, linkage plate, 82, pulley part, 121, side main beam, 122, middle transverse beam, 611, upper hanging ear plate. DETAILED DESCRIPTION

[0060] The specific embodiments of the application will be further described in detail below with reference to the accompanying drawings.

[0061] A body spot welding truss for welding line debugging, comprising a gantry frame 1; the gantry frame 1 is provided with a rolling structure 5 and a spot welding system 3; the rolling structure 5 comprises a plurality of rolling mechanisms arranged on the gantry frame 1; the spot welding system 3 comprises a spot welding unit and a slide rail beam unit 2; the spot welding unit is connected to the gantry frame 1 through the slide rail beam unit 2; the body spot welding truss disclosed by the application is a highly integrated and flexible body spot welding debugging system, which solves the industry pain point that traditional automobile welding production lines (especially newly built or exported production lines) cannot be verified under real working conditions during the early debugging stage; the application directly uses the same resistance spot welding process and equipment (welding tongs 31, controller 32) as the formal production line, so that the trial production verification carried out in the integrator factory can 100% restore the real production working condition in the automobile manufacturer workshop in the future; under the real spot welding pressure and process, the precision problem of the body fixture and positioning mechanism can be exposed and solved in advance; qualified welding points are directly obtained, the rationality of the welding parameters (current, time, pressure) is verified, and the welding quality is ensured; the reachability of the welding tongs 31 and the complex profile of the body, the interference condition, and the cooperative working state of all control equipment are tested in advance.

[0062] Specifically, the gantry frame 1 is a portal structure similar to an inverted U-shaped structure, which is a basic main structure of the body spot-welded truss, facilitating the arrangement and placement of the subsequent rolling structure 5 and the spot-welding system 3.

[0063] In the present application, the rolling structure 5 mainly includes a rolling mechanism, which is generally selected as a caster, facilitating the subsequent movement operation of the body spot-welded truss.

[0064] The spot-welding system 3 is mainly used for the subsequent product welding operation.

[0065] In the present application, the spot-welding system 3 includes a spot-welding unit and a slide rail beam unit 2; the spot-welding unit is connected to the gantry frame 1 through the slide rail beam unit 2; the slide rail beam unit 2 serves as a connection point, facilitating the hanging installation of the spot-welding system 3, and in the present application, the slide rail beam unit 2 also serves as a slide rail mechanism, facilitating the movement of the welding tongs 31 in space.

[0066] Further, in the present application, the gantry frame 1 includes a column frame 11 and a cross beam frame 12; the cross beam frame 12 is provided with a column frame 11 at each end, and each column frame 11 is provided with at least two rolling mechanisms at the bottom; the column frame 11 serves as a longitudinal support frame, and the transverse frame facilitates the suspension arrangement of the welding system.

[0067] In the present application, the column frame 11 is provided with a placing unit at the end away from the cross beam frame 12, and the placing unit includes a placing platform 13; the placing platform 13 mainly serves as a placing function, and can be used to place switch cabinets, welding cooling water supply boxes, etc.; when additional components are arranged on the placing platform 13, the placing platform 13 also serves as a counterweight unit, which can ensure the stability of the gantry frame 1.

[0068] Further, in the present application, the spot-welding unit includes a spot-welding structure; each spot-welding structure includes a welding tong mechanism and a controller mechanism; the welding tong mechanism is used for spot-welding operation of the product, and each welding tong mechanism includes at least one welding tong 31; each controller mechanism includes at least one welding controller 32; each welding tong 31 is connected to the slide rail beam unit 2 through a balancer; the welding controller 32 is connected to the slide rail beam unit 2 through a suspension mechanism; each welding tong 31 is connected to the corresponding welding controller 32 through a welding tong cable 33; the welding tong cable 33 connected to each welding tong 31 is connected to the slide rail beam unit 2 through a balancer; the welding tong 31 is a terminal for execution, which directly performs resistance spot welding on the body panel.

[0069] The welding tongs 31 melt two or more metal plates into a welding point through a large current and pressure in an instant.

[0070] Real process verification: the core value of the whole system is to use the same type of equipment as the formal production line for debugging to ensure the authenticity and reliability of the results.

[0071] The welding gun balance is generally a pneumatic or spring-assisted device that fully or partially offsets the weight of the welding gun 31; through the use of the welding gun balance, the labor intensity of the operator is greatly reduced: the operator can easily and accurately position: avoid positioning inaccuracies and welding gun 31 shaking caused by worker fatigue; moving and adjusting the welding gun 31 is fast, reducing the single operation cycle.

[0072] The welding gun cable 33 is used to connect the welding gun 31 and the welding controller 32, and is used to transmit huge welding current; ensure function implementation; specially designed large cross-section cable ensures stable transmission of energy and signal; usually used with cable balance to prevent cable wear and tear and further improve the operation feel.

[0073] The welding controller 32 is the "brain" of the spot welding system 3.

[0074] The welding controller 32 provides precise welding parameter control for the welding gun 31, including welding current, time, pressure, and fault diagnosis and data recording; the welding controller 32 ensures welding quality consistency: precise control ensures that every trial welding point is consistent with the quality requirements of future formal production; during the debugging stage, the best welding parameters for different welding points can be found and solidified in advance; provide data support for the debugging process, which is convenient for analysis and problem solving.

[0075] The use of the suspension mechanism is mainly to firmly connect the welding controller 32 to the gantry frame 1, which can be a suspension rod or a telescopic rod, and the specific selection can be made according to the actual requirements; the purpose is to integrate the welding controller 32, a key device, into the mobile truss as a whole, avoiding occupying ground space alone; the use of the suspension mechanism makes the welding controller 32 equivalent to being suspended, which can avoid possible oil stains and water vapor erosion on the ground, and reduce the impact of collisions during movement.

[0076] Further, in the present application, the slide rail beam unit 2 includes a longitudinal beam unit and a cross beam unit; the cross beam unit is connected to the cross beam frame 12 in the gantry frame 1 through the longitudinal beam unit; the longitudinal beam unit includes a plurality of longitudinally distributed longitudinal beams 21; the cross beam unit includes a plurality of transversely distributed cross beams 22; in the present application, the longitudinal beam unit is a primary load-bearing and guiding structure: the longitudinal beam 21 is the main load-bearing member directly suspended on the cross beam of the gantry frame 1; it bears the entire cross beam unit, all welding guns 31, balance and reaction force during operation.

[0077] The longitudinal beam unit provides the first dimension (usually the longitudinal direction) of the track for the movement of the cross beam unit.

[0078] The longitudinal beam unit mainly evenly transmits the weight and force from all the components below through multiple hanging points to the solid gantry cross beam, ensuring the stability of the structure.

[0079] The operator can push the cross beam 22 along the longitudinal beam 21 to move the entire cross beam in the length direction of the vehicle body, quickly positioning it to different work areas.

[0080] The cross beam unit mainly includes multiple cross beams 22, which serve as a secondary load-bearing and guiding structure: the cross beams 22 are the components directly suspended with the welding tongs 31 and the balancer, and the cross beam unit slides on the track provided by the longitudinal beam 21.

[0081] It can be used to establish a secondary direction track: it provides the second dimension (usually the transverse direction) of the track for the movement of the welding tongs 31; it completes two-dimensional plane coverage: in combination with the longitudinal beam 21, it forms a "crown block" system that moves in the horizontal plane.

[0082] The welding tongs 31 can reach any point in this plane through this system.

[0083] Each cross beam 22 is connected to the cross beam frame 12 by at least two longitudinal beams 21; such an arrangement can ensure stability and balance: the two ends (or more points) of a cross beam 22 are hung on two independent longitudinal beams 21, forming a stable support.

[0084] Such a design can prevent overturning and shaking: when the welder operates the heavy welding tongs 31 at one end of the cross beam 22, this two-point or multi-point support design can effectively prevent the cross beam from twisting, tilting or shaking violently, ensuring the safety and accuracy of the operation.

[0085] Connecting the longitudinal beam 21 and the cross beam 22 into a stable grid-like frame enhances the overall rigidity of the entire sliding rail beam unit 2, enabling it to withstand dynamic loads.

[0086] The invention creates an extremely efficient three-dimensional work space through the sliding rail beam unit 2 composed of longitudinal beams 21 + cross beams 22, as well as the gantry frame 1 and the welding tongs balancer.

[0087] First dimension (Y-axis): the longitudinal beam 21 enables the cross beam and the welding tongs 31 to move forward and backward along the vehicle body.

[0088] Second dimension (X-axis): the cross beam 22 enables the welding tongs 31 to move left and right on the cross beam.

[0089] The third dimension (Z axis): the welding tongs balancer enables the welding tongs 31 to move up and down and be accurately positioned to the body surface of different heights.

[0090] The dense and parallel distribution of the plurality of longitudinal rails and cross rails ensures that the welding tongs 31 can cover most of the welding points, avoiding the problem that some positions cannot be reached due to insufficient rails.

[0091] Further, in the present application, the longitudinal beam 21 is connected with the cross beam frame 12 through the hanging unit 6. The hanging unit 6 is mainly arranged to facilitate the connection between the longitudinal beam 21 and the cross beam frame 12.

[0092] In the present application, the hanging unit 6 comprises a lower hanging frame 7 and an upper hanging frame 61. The lower hanging frame 7 comprises a hanging connecting plate 71 and two lower hanging lug plates 72 which are spaced apart and connected to the hanging connecting plate 71. The upper hanging frame 61 comprises two upper hanging lug plates 611 which are spaced apart and connected to the hanging connecting plate 71. The upper hanging lug plates 611 are hung on the cross beam frame 12. The lower hanging lug plates 72 are connected to the longitudinal beam 21. The upper hanging lug plates 611 and the lower hanging lug plates 72 are J-shaped in vertical section. Based on the above design, the upper hanging frame 61 can be hung on the cross beam frame 12, and the lower hanging frame 7 can be connected to the longitudinal beam 21, thereby realizing the use of the longitudinal beam 21 on the cross beam frame 12.

[0093] In the present application, the hook portion of the upper hanging lug plate 611 is directly clamped (hung) on the lower flange of the cross beam frame 12 (usually an I-beam).

[0094] The two lug plates are spaced apart, providing excellent torsional and overturning stability.

[0095] In the present application, the upper hanging lug plate 611 can be fastened to the hanging connecting plate 71 by bolts.

[0096] The function of the lower hanging frame 7 is to connect with the longitudinal beam 21 in the sliding rail beam unit 2.

[0097] The two oppositely arranged lower hanging lug plates 72 are arranged in a wrapping gap. The corresponding longitudinal beam 21 can be inserted into the wrapping gap, thereby realizing the insertion and installation of the longitudinal beam 21 on the lower hanging frame 7. In order to lock and fix, fasteners are arranged on the side of the lower hanging frame 7, which pass through the lower hanging frame 7 and press against the outer wall of the corresponding longitudinal beam 21, thereby realizing the locking and fixing between the longitudinal beam 21 and the lower hanging frame 7.

[0098] The upper hanging lug plate 611 and the lower hanging lug plate 72 are in J shape in the vertical section, so that the upper hanging lug plate 611 and the lower hanging lug plate 72 are a "hook" structure, and the curved hook part of the "J" shape provides a surrounding structure, and the stability of the connection between the upper hanging lug plate 611 and the lower hanging lug plate 72 and adjacent components is better ensured.

[0099] Further, in the application, the transverse beam 22 is connected with the longitudinal beam 21 through a linkage unit, and the linkage unit facilitates the connection between the transverse beam 22 and the longitudinal beam 21.

[0100] In the application, the linkage unit comprises a lower hanging frame 7 and a linkage component 8 arranged on the lower hanging frame 7, the linkage component 8 comprises a linkage plate 81 arranged on the lower hanging frame 7, the linkage plate 81 is provided with a pulley part 82, the side surface and / or the end surface of the linkage plate 81 is provided with the pulley part 82, the longitudinal beam 21 is provided with a longitudinal beam hanging groove, and the linkage plate 81 is hung in the longitudinal beam hanging groove through the slide rail part, the lower hanging frame 7 facilitates the connection between the transverse beam 22 and the longitudinal beam 21, the linkage plate 81 is mainly a longitudinal plate, which is convenient to insert into the longitudinal beam 21, the longitudinal beam 21 is provided with a longitudinal beam hanging groove, the longitudinal beam hanging groove is in a structure of large at the top and small at the bottom, the linkage plate 81 is inserted into the longitudinal beam 21, and a plurality of pulley parts 82 are arranged on the side surface and the upper end of the linkage plate 81 respectively, and the pulley parts 82 are pressed against the inner wall of the longitudinal beam hanging groove.

[0101] The pulley part 82 is installed on the linkage plate 81, and is usually two or more groups of pulleys or rollers, the main function of the pulley part 82 is to bear the vertical gravity and roll on the longitudinal beam 21, the purpose is to convert sliding friction into rolling friction, so that the operator can push the heavy transverse beam 22 and the suspended welding tongs 31 along the longitudinal beam 21 with very small force, and the movement is stable and smooth without jamming.

[0102] The longitudinal beam hanging groove is a key matching structure arranged on the longitudinal beam 21, and is a groove specially used for accommodating the linkage plate 81 and the slide rail part, and provides a unified and reliable installation and movement track for all linkage units, and forms a closed / semi-closed structure, cooperates with the pulley part 82 to form a movement pair with good constraint, and greatly enhances the rigidity and safety of the system.

[0103] Further, in the present invention, the transverse beam 22 is connected with the balancer through the linkage component 8; the transverse beam 22 is provided with a transverse beam hanging groove, and the linkage component 8 is hung in the transverse beam hanging groove through a pulley part 82; the transverse beam hanging groove is a track provided on the transverse beam 22, which has a similar function with the longitudinal beam hanging groove on the longitudinal beam 21, but the direction is perpendicular to each other (one in the X direction and one in the Y direction); the purpose is to provide a second dimension moving track: together with the longitudinal beam 21, the two-dimensional movement of the welding tongs 31 on the horizontal plane (X-Y plane) is completed.

[0104] The pulley part 82 (hung in the transverse beam hanging groove) on the linkage component 8 is essentially a pulley block above the linkage component 8, which functions to enable the entire linkage component 8 (together with the balancer and the welding tongs 31 hung below it) to move easily along the transverse beam 22; the function is to realize the labor-saving transverse movement: the operator can extremely easily slide the welding tongs 31 left and right, and position to the position with different widths of the vehicle body.

[0105] The top end of the balancer is fixed below the linkage component 8 through a standard connecting piece (such as a hook or an adapter plate).

[0106] Further, in the present invention, the transverse beam frame 12 includes two side main beams 121, and the two side main beams 121 are connected through a plurality of middle transverse beams 122; the side main beams 121 and the middle transverse beams 122 are all I-beams; the hanging unit 6 in the slide rail beam unit 2 is hung on the lower flange of the middle transverse beam 122; the two side main beams 121 of the present invention are the main load-bearing skeletons of the transverse beam frame 12, which directly bear most of the load from the entire frame and transmit it to the two side columns.

[0107] And the plurality of middle transverse beams 122 are mainly used for connecting the two side main beams 121 to form a stable truss structure.

[0108] The present invention selects the I-beam as the material of all beams, which is based on its excellent mechanical properties.

[0109] High bending resistance: the "I" shaped cross section of the I-beam enables it to provide the maximum cross-sectional moment of inertia when bearing the vertical load, and to achieve the highest strength and stiffness with the least material.

[0110] Natural standard hanging interface: the lower flange of the I-beam provides a perfect, ready-made, standardized suspension track; without additional welding or processing of complex hanging structures on the beam.

[0111] In the present invention, the hanging unit 6 is hung on the lower flange of the middle transverse beam 122.

[0112] Further, in the present application, the spot welding system 3 comprises two spot welding structures; the two spot welding structures are symmetrically distributed on the gantry frame 1; in the present application, the two spot welding structures are symmetrically distributed; the essence is that on the left and right sides of the gantry frame 1, a complete and independent spot welding unit (including welding tongs 31, controllers 32, balancers, etc.) is arranged; based on this design, the present application can support parallel operation: allow multiple welders to operate at the same time, and be responsible for the welding work on the left and right sides of the vehicle body respectively; this directly improves the theoretical production efficiency by one time, greatly shortens the debugging and welding period of a single vehicle body.

[0113] Achieve natural partitioning of the working area: divide the large vehicle body into two relatively independent working areas, avoid interference between operators and equipment during movement, and improve safety and operation smoothness.

[0114] In the present application, the controller mechanism in each spot welding structure is distributed on one end of the cross beam frame 12 close to the column frame 11; placing the controller 32 on the edge makes it away from the core working area directly above the vehicle body, avoiding its occupation and interference with the operation space and the moving route of the welding tongs 31; arranging on both sides facilitates technicians to make wiring, parameter setting and maintenance from the outside, and also facilitates equipment heat dissipation.

[0115] Further, in the present application, the welding controller 32 is directly connected to the cross beam frame 12 through the longitudinal beam 21; the welding tongs 31 are connected to the cross beam frame 12 through the transverse beam 22 and the longitudinal beam 21; because the welding tongs 31 need to move frequently and widely, they are connected to the slide rail through the balancer, ensuring flexibility.

[0116] The controller 32 generally does not need to follow the movement, so it is fixedly installed through the suspension mechanism 9, ensuring stability and safety.

[0117] In the present application, the welding tongs 31 are connected to the transverse beam 22 through the balancer, then connected to the longitudinal beam 21 through the linkage unit, and finally suspended below the cross beam frame 12.

[0118] In the present application, the controller mechanisms in the two spot welding structures are symmetrically distributed on the cross beam frame 12; the symmetrically distributed controller mechanisms form a middle arrangement area; each welding tong mechanism is arranged in the middle arrangement area.

[0119] During welding, the controller 32 that does not need to move is fixed at both ends of the gantry frame 1.

[0120] The welding tongs 31 that need to move: are active in the middle area of the gantry frame 1.

[0121] The two controllers 32 of the two spot welding structures are symmetrically distributed at both ends, and the area between them naturally forms a wide "middle arrangement area" without any obstruction; this area is completely given to the welding tongs 31 and the car body, so that the operator can obtain the best working view and operating space.

[0122] Embodiments:

[0123] With reference to the accompanying drawings, the embodiments provide a mobile car body spot welding truss for welding line debugging.

[0124] The car body spot welding truss is mainly used for production debugging in the trial production stage of the automobile or before the factory leaves the export production line, aiming to simulate the resistance spot welding working condition of the formal production line in advance to verify the positioning accuracy of the equipment and fixture and the welding process.

[0125] The car body spot welding truss mainly comprises a gantry frame 1, a rolling structure 5 and a spot welding system 3.

[0126] Regarding the gantry frame 1:

[0127] The gantry frame 1 is the basic support structure of the whole system, which is in the shape of an inverted U.

[0128] It specifically comprises two column frames 11 and a beam frame 12.

[0129] The two ends of the beam frame 12 are fixedly connected to the top of the two column frames 11 respectively.

[0130] The beam frame 12 is composed of two parallel side main beams 121 and a plurality of middle beams 122 connected between the two.

[0131] As a preferred solution, the side main beams 121 and the middle beams 122 are both standard I-beams, and the lower flanges thereof provide interfaces for subsequent hanging.

[0132] At least two rolling mechanisms 21 are installed at the bottom of each column frame 11, and in the embodiments, universal casters with brake function are preferred, so that the whole heavy truss system can be manually pushed to realize flexible transfer between stations.

[0133] A placing unit is further arranged at the bottom of at least one of the column frames 11, which comprises a placing platform 13 for carrying auxiliary equipment such as power distribution cabinets and welding cooling water supply tanks.

[0134] The integrated arrangement of these equipment avoids the occupation of ground space, and its own weight also plays a counterweight role, enhancing the overall stability of the gantry frame 1 during operation.

[0135] Spot welding system 3:

[0136] The spot welding system 3 is suspended on the portal frame 1 through the slide rail beam unit 2, and mainly comprises two symmetrical spot welding structures to support two operators to simultaneously perform welding work on the left and right sides of the vehicle body.

[0137] The slide rail beam unit 2:

[0138] The slide rail beam unit 2 is the core to realize large-range and flexible movement of the welding gun 31.

[0139] The slide rail beam unit 2 comprises: a longitudinal beam unit, which comprises a plurality of longitudinal beams 21 distributed in parallel at intervals.

[0140] The longitudinal beams 21 are connected with the lower flanges of the middle beams 122 of the beam frame 12 through the hanging units 6.

[0141] The hanging unit 6 comprises a hanging connecting plate 71, and the upper end of the hanging connecting plate 71 is connected with two upper hanging lug plates 611 distributed at intervals and having J-shaped cross sections, which are directly hung on the lower flanges of the I-beams.

[0142] The lower end of the hanging connecting plate 71 is connected with two lower hanging lug plates 72 also having J-shaped cross sections, which are used to clamp and fix the end portions of the longitudinal beams 21. This design realizes the quick, stable and non-welding modular connection of the slide rail beam unit 2 and the portal frame 1.

[0143] The slide rail beam unit 2 further comprises a transverse beam unit, which comprises a plurality of transverse beams 22 distributed in parallel at intervals.

[0144] Each transverse beam 22 is connected with at least two longitudinal beams 21 through the linkage units to form a stable grid-shaped plane.

[0145] The linkage unit:

[0146] The linkage unit is a key component to realize the light movement of the transverse beams 22 on the longitudinal beams 21.

[0147] The linkage unit comprises a lower hanging frame 7 and a linkage component 8 fixed to the lower hanging frame 7.

[0148] The linkage component 8 comprises a vertical linkage plate 81.

[0149] The top of the linkage plate 81 is provided with a pulley part 82, and the side surface and / or end surface thereof is provided with a slide rail part.

[0150] Correspondingly, the longitudinal beam 21 is provided with a longitudinal beam hanging groove.

[0151] During installation, the linkage plate 81 is embedded in the longitudinal beam hanging groove, the slide rail part thereof is in contact with the inner wall of the hanging groove to guide and prevent disengagement, and the pulley part 82 bears on the track in the hanging groove to change the sliding friction into rolling friction, so that the pushing force is greatly reduced.

[0152] Similarly, the transverse beam 22 is provided with a beam hanging groove.

[0153] The welding gun balancer is hung in the beam hanging groove through a similar linkage component 8 with its pulley part 82, so as to realize the light movement of the welding gun 31 in the transverse direction.

[0154] Spot welding unit:

[0155] Each spot welding unit comprises a welding gun mechanism and a controller mechanism.

[0156] Controller mechanism: mainly comprising a welding controller 32.

[0157] The welding controller 32 is fixedly connected to the longitudinal beam 21 at both ends of the portal frame 1 through a suspension mechanism (such as a suspension rod or chain). This arrangement makes the heavy welding controller 32 away from the central work area, facilitating wiring and maintenance, and its symmetrical distribution helps to balance the load of the portal frame 1.

[0158] Welding gun mechanism: mainly comprising a welding gun 31, a welding gun balancer and a cable balancer. The welding gun 31 is suspended below the transverse beam 22 through the welding gun balancer. The heavy welding gun cable 33 is suspended by the cable balancer.

[0159] The use of the balancer completely offsets the gravity of the welding gun 31 and the cable, enabling the operator to easily and accurately move and position the welding gun 31 in three-dimensional space.

[0160] Working process and effect:

[0161] In use, the operator pushes the trolley loaded with the body panel to be debugged and the clamp into the lower central area of the portal frame 1.

[0162] By manually pushing the entire truss system, it can be quickly aligned to different stations.

[0163] The operator can be located on both sides of the body.

[0164] Push the entire transverse beam 22 unit in the longitudinal direction (Y axis).

[0165] Slide the welding gun balancer easily in the transverse direction (X axis).

[0166] Pull up and down the welding gun 31 assisted by the balancer in the vertical direction (Z axis).

[0167] In this way, the welding gun 31 can be quickly and accurately positioned to any welding point position on the body.

[0168] After starting the welding gun 31, the welding controller 32 provides welding parameters consistent with the formal production line to perform real resistance spot welding.

[0169] The symmetrically distributed controller mechanism forms a wide, equipment interference-free middle arrangement area in the middle of the beam frame 12, providing optimal space for the welding gun 31 operation and the vehicle body placement.

[0170] In summary, the mobile vehicle body spot welding truss of the embodiment successfully concentrates a complete spot welding workstation in a mobile gantry through the design of high integration and mobile flexibility, realizes 100% real restoration of the formal production process in the debugging stage, effectively shortens the installation and debugging period at the customer site, and reduces the debugging cost and risk.

[0171] Obviously, the specific implementation of the present application is not limited by the above-mentioned manner, and various non-essential improvements made by adopting the method concept and technical solutions of the present application are within the protection scope of the present application.

Claims

1. A body-in-white spot welding truss for welding line commissioning, characterized by, It comprises a gantry frame; the gantry frame is provided with a rolling structure and a spot welding system; The rolling structure comprises a plurality of rolling mechanisms arranged on the gantry frame; The spot welding system comprises a spot welding unit and a slide rail beam unit; The spot welding unit is connected to the gantry frame through the slide rail beam unit.

2. The body-in-white spot-tube frame for debugging a welding line according to claim 1, characterized in that, The gantry frame comprises a column frame and a beam frame; the beam frame is provided with a column frame at each end; each column frame is provided with at least two rolling mechanisms at the bottom; The column frame is further provided with a placing unit at the end away from the beam frame; the placing unit comprises a placing platform.

3. The body-in-white spot-tube frame for debugging a welding line according to claim 1, characterized in that, The spot welding unit comprises a spot welding structure; each spot welding structure comprises a welding tongs mechanism and a controller mechanism; each welding tongs mechanism comprises at least one welding tongs; each controller mechanism comprises at least one welding controller; each welding tongs is connected to the slide rail beam unit through a balancer; the welding controller is connected to the slide rail beam unit through a suspension mechanism.

4. The body-in-white spot-tie-fram e for debugging a welding line according to claim 3, characterized in that, Each welding tongs is connected to the corresponding welding controller through a welding tongs cable; the welding tongs cable connected to each welding tongs is connected to the slide rail beam unit through the balancer.

5. A body-in-white spot grid for commissioning a welding line according to any one of claims 1 to 4, characterized in that The slide rail beam unit comprises a longitudinal beam unit and a transverse beam unit; The transverse beam unit is connected to the beam frame in the gantry frame through the longitudinal beam unit; The longitudinal beam unit comprises a plurality of longitudinally arranged longitudinal beams; The transverse beam unit comprises a plurality of transversely arranged transverse beams; Each transverse beam is connected to the beam frame through at least two longitudinal beams.

6. The body-in-white spot-tube frame for debugging a welding line according to claim 5, characterized in that, The longitudinal beam is connected to the beam frame through a hanging unit; The hanging unit comprises a lower hanging frame and an upper hanging frame; The lower hanging frame comprises a hanging connecting plate and two lower hanging ear plates spaced apart on the hanging connecting plate; The upper hanging frame comprises two upper hanging ear plates spaced apart on the hanging connecting plate; The upper hanging ear plate is hung on the beam frame; the lower hanging ear plate is connected to the longitudinal beam; the upper hanging ear plate and the lower hanging ear plate are vertically sectioned into a J shape.

7. The body-in-white spot-tube frame for debugging a welding line according to claim 6, characterized in that, The transverse beam is connected to the longitudinal beam through a linkage unit; The linkage unit comprises a lower hanging frame and a linkage component arranged on the lower hanging frame; The linkage component comprises a linkage plate arranged on the lower hanging frame; the linkage plate is provided with a pulley portion; the side surface and / or end surface of the linkage plate is provided with a pulley portion; the longitudinal beam is provided with a longitudinal beam hanging groove, and the linkage plate is hung in the longitudinal beam hanging groove through the slide rail portion.

8. The body-in-white spot-tie-fram e for debugging a welding line according to claim 7, characterized in that, The transverse beam is connected to the balancer through the linkage component; the transverse beam is provided with a transverse beam hanging groove, and the linkage component is hung in the transverse beam hanging groove through the pulley portion.

9. The body-in-white spot-tie-fram e for debugging a welding line according to claim 1, characterized in that, The beam frame comprises two side main beams connected through a plurality of middle transverse beams; the side main beam and the middle transverse beam are I-beams; the hanging unit in the slide rail beam unit is hung on the lower flange of the middle transverse beam.

10. The body-in-white spot-tie-fram e for debugging a welding line according to claim 3, characterized in that, The spot welding system comprises two spot welding structures; the two spot welding structures are symmetrically distributed on the gantry frame; The controller mechanism in each spot welding structure is distributed at one end of the beam frame close to the column frame; The welding controller is directly connected to the beam frame through the longitudinal beam; The welding tongs is connected to the beam frame through the transverse beam and the longitudinal beam; The controller mechanisms in the two spot welding structures are symmetrically distributed on the beam frame; a middle arrangement area is formed between the symmetrically distributed controller mechanisms; and each welding tong mechanism is arranged in the middle arrangement area.

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