Automobile body welding fixture

Abstract

The invention relates to the technical field of automobile body welding clamps, in particular to an automobile body welding clamp which comprises a welding support and further comprises a welding clamp seat, the welding clamp seat is fixedly connected with the welding support, a plurality of L-shaped moving seats are arranged on the welding clamp seat, and each L-shaped moving seat is provided with a clamping part; the clamping control mechanism comprises a clamping driving assembly and a detection compensation assembly; according to the automobile body welding fixture, when a plurality of fixtures are used for fixing an automobile body, the use condition of the fixture can be monitored before welding operation and in the welding process, and the clamping force is automatically compensated when a certain fixture has a controllable fault, so that the situation that the automobile body shakes or shakes in the welding process is avoided, and the welding quality of the automobile body is improved. And the stability of the vehicle body is guaranteed, and the welding quality and effect are improved.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle body welding fixtures, in particular to a vehicle body welding fixture. Background Art

[0002] Automobile body welding fixtures are key process equipment in the automobile manufacturing process, and play a vital role in improving automobile production efficiency and ensuring product quality. The design, manufacturing and application level of welding fixtures directly affect the welding quality, production efficiency and manufacturing cost of automobile bodies. With the continuous development of the automobile industry, especially the rapid rise of the new energy vehicle market, the automobile body welding fixture industry is facing unprecedented market opportunities and challenges. New energy vehicles have higher requirements for lightweight body and energy conservation and emission reduction, which puts forward new challenges and higher requirements for the design, manufacturing and application of welding fixtures.

[0003] During use, the existing automobile body welding fixtures need to use multiple fixtures to fix the body due to the large size of the body. However, when a fixture fails or for other reasons, the staff cannot discover and deal with it in time, which may cause the body to shake or sway during the welding process, thereby affecting the quality and effect of welding and being inconvenient to use. Therefore, in view of the above situation, it is urgent to develop an automobile body welding fixture to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The object of the present invention is to provide a welding fixture for an automobile body to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A welding fixture for an automobile body, comprising a welding bracket, and further comprising: A welding fixture seat, wherein the welding fixture seat is fixedly connected to the welding bracket, and a plurality of L-shaped movable seats are arranged on the welding fixture seat, and each of the L-shaped movable seats is provided with a clamping portion; and a clamping control mechanism, the clamping control mechanism is respectively connected to the welding fixture seat and the L-shaped movable seat, and is electrically connected to a pressure sensor provided on the clamping portion, wherein the clamping control mechanism includes a clamping drive component and a detection compensation component; The clamping drive assembly is connected to the welding fixture seat and the L-shaped moving seat respectively, and the detection compensation assembly is connected to the clamping drive assembly and is electrically connected to the pressure sensor provided on the clamping part; The clamping drive assembly drives multiple L-shaped moving seats to move simultaneously on the welding fixture seat, and clamps the car body to be welded in multiple directions. At the same time, the pressure sensors arranged on the multiple clamping parts detect the clamping force in multiple directions, thereby controlling the corresponding detection compensation assembly to automatically perform dynamic compensation on the parts with insufficient clamping force.

[0006] As a further solution of the present invention: it also includes: a displacement indicating slide rail, the number of the displacement indicating slide rail is multiple, and the multiple displacement indicating slide rails are fixedly mounted on the welding fixture seat; And a movable slider, the number of which is equal to the number of the L-shaped movable seats, and the plurality of movable sliders are respectively fixedly connected to the plurality of L-shaped movable seats and are respectively slidably connected to the plurality of displacement indicating slide rails.

[0007] As a further solution of the present invention: the clamping drive assembly comprises: A hydraulic cylinder, wherein the hydraulic cylinder is fixedly connected to the welding fixture seat, and a telescopic head is fixedly installed on the output end of the hydraulic cylinder; A clamping lifting plate, wherein the clamping lifting plate is detachably connected to the telescopic head; An L-shaped support plate, wherein the number of the L-shaped support plates is multiple, and the multiple L-shaped support plates are fixedly connected to the clamping lifting plate; And a transmission unit, wherein the transmission unit is respectively connected to the L-shaped moving seat and the L-shaped supporting plate, and is connected to the detection and compensation component.

[0008] As a further solution of the present invention: the transmission unit comprises: A guide slide bar, the guide slide bar is fixedly connected to the L-shaped support plate; A lifting slide plate, the lifting slide plate is sleeved on the guide slide bar and is slidably connected to the guide slide bar, and the lifting slide plate is also in contact with the top end of the L-shaped support plate and is connected to the detection compensation component; A driving connecting frame, one end of which is rotatably connected to the lifting slide plate; And a rotating shaft, the rotating shaft is rotatably connected to the bottom end of the L-shaped movable seat, and the rotating shaft is also rotatably connected to the other end of the driving connecting frame.

[0009] As a further solution of the present invention: the detection compensation component includes: A control rod, one end of which is fixedly connected to the lifting slide, and the other end of which is fixedly mounted with a movable pull plate; A clamping adjustment sleeve, wherein the clamping adjustment sleeve is sleeved on the movable pull plate and is slidably connected with the movable pull plate; and a compensation control unit, wherein the compensation control unit is respectively connected to the clamping lifting plate and the clamping adjustment sleeve, and generates a magnetic attraction force on the movable pull plate.

[0010] As a further solution of the present invention: the compensation control unit includes: An electromagnetic control integration, the electromagnetic control integration is fixedly mounted on the clamping lifting plate; A wiring trough, wherein the number of the wiring troughs is multiple, the multiple wiring troughs are all fixedly connected to the clamping lifting plate, and are integratedly connected to the electromagnetic control, and cables are arranged in the wiring troughs; And a fixed support rod, one end of which is fixedly connected to the clamping lifting plate, and a clamping control box is fixedly installed on the other end of the fixed support rod, and the clamping control box is fixedly connected to the clamping adjustment sleeve.

[0011] As a further solution of the present invention: it also includes: a detection indicator, the number of the detection indicators is multiple, the multiple detection indicators are fixedly installed on the clamping control box, and the detection indicator is also electrically connected to the electromagnetic control integration.

[0012] As a further solution of the present invention: it also includes: a regulating hydraulic compartment, the regulating hydraulic compartment is fixedly connected to the L-shaped support plate; The regulating hydraulic chamber is composed of two parts, hydraulic chamber 1 and hydraulic chamber 2. Both hydraulic chamber 1 and hydraulic chamber 2 are fixedly connected to the L-shaped support plate, and piston plates are arranged in the hydraulic chamber 1 and hydraulic chamber 2. Wherein, the control rod passes through the hydraulic chamber 1 and the hydraulic chamber 2, and is fixedly connected to the piston plate; And an adjacent clamping compensation unit, wherein the adjacent clamping compensation unit is respectively connected to the clamping lifting plate, the hydraulic chamber one and the hydraulic chamber two.

[0013] As a further solution of the present invention: the adjacent part clamping compensation unit comprises: A hydraulic rotating cylinder, wherein the number of the hydraulic rotating cylinders is multiple, and the multiple hydraulic rotating cylinders are fixedly connected to the clamping lifting plate; Hydraulic pipe 1, one end of which is fixedly connected to the hydraulic central rotating cylinder and communicated with the hydraulic central rotating cylinder, and the other end of which is communicated with hydraulic chamber 2 on the regulating hydraulic chamber; and a second hydraulic pipe, one end of which is fixedly connected to the hydraulic central rotating cylinder and communicated with the hydraulic central rotating cylinder, and the other end of which is communicated with a first hydraulic tank on the adjacent regulating hydraulic tank; Wherein, the hydraulic pipe 1 and the hydraulic pipe 2 are both provided with solenoid valves, and the solenoid valves are electrically connected to the electromagnetic control integration.

[0014] As a further solution of the present invention: it also includes: adjusting telescopic cylinders, the number of which is equal to the number of the hydraulic rotating cylinders, and the plurality of adjusting telescopic cylinders are fixedly mounted on the clamping lifting plate and are respectively arranged opposite to the plurality of the hydraulic rotating cylinders; The output end of the adjusting telescopic cylinder is inserted into the hydraulic rotating cylinder, and a sealing circular plate is fixedly installed on the output end of the adjusting telescopic cylinder. The sealing circular plate is slidably installed in the hydraulic rotating cylinder and is located above the second hydraulic pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When welding a car body, first, the car body frame to be welded can be placed on the upper part of the welding fixture seat and contacted with multiple L-shaped movable seats, wherein the number of L-shaped movable seats can be set according to actual conditions, such as the welding location and welding conditions, and four are preferably used here. Then, the clamping drive assembly is started to make the clamping part contact with the specified location on the car body, wherein the clamping part can be provided with corresponding clamping plates and pressure sensors, the clamping plates are connected to the clamping part by bolt connection, the pressure sensor is installed on the clamping plates, and the clamping plates can be removed from the clamping part to provide good clamping effect for different car bodies. As the pressure sensor is put into operation, when the preset value is reached, it means that the clamping is in place. At this time, the clamping drive assembly is shut down, and the detection and compensation assembly starts working. Under the monitoring and control of the detection and compensation assembly, three working conditions of the fixture can be coped with, thereby ensuring that the welding work of the car body is carried out smoothly during the welding process, that is, the first working condition. During the welding process, when a clamp suddenly has slight damage, the detection and compensation assembly provides a damaged clamping plate. Power, to ensure the clamping effect, at the same time, the adjacent clamping force is increased accordingly, so as to complete the welding work smoothly. In the second working condition, when a certain clamp is seriously damaged, the power provided by the detection and compensation component to the damaged clamp cannot achieve the clamping work of the clamping part on the body, which will affect the welding quality. Then the welding machine is immediately controlled to stop welding, thereby playing a monitoring and protection role. In the third working condition, before the welding operation, when the clamp contacts the designated part of the body, if a certain clamp is found to be damaged (even if it is slightly damaged), as long as the detection and compensation component is activated, the machine will be stopped immediately for inspection, thereby ensuring the smooth progress of subsequent welding work, playing the role of advance prediction and prevention, simple operation, when using multiple clamps to fix the body, the use of the clamps can be monitored before and during the welding operation, and when a controllable fault occurs in a clamp, the clamping force is automatically compensated, thereby avoiding the shaking or shaking of the body during the welding process, ensuring the stability of the body, which is conducive to improving the quality and effect of welding, and providing convenience for the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the automobile body welding fixture in an embodiment of the present invention.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the electromagnetic control integration in the embodiment of the present invention when viewed from the bottom.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the welding fixture seat in the embodiment of the present invention.

[0019] Figure 4 It is a schematic diagram of the main structure of the L-shaped moving seat in an embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the clamping lifting plate in an embodiment of the present invention.

[0021] Figure 6 It is a three-dimensional structural schematic diagram of the distribution of the hydraulic rotating drum in an embodiment of the present invention.

[0022] Figure 7 It is a bottom view structural schematic diagram of the clamping lifting plate in an embodiment of the present invention.

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the clamping and adjusting sleeve in an embodiment of the present invention.

[0024] Fig. 9 It is a schematic diagram of the cross-sectional structure of the wiring trough in an embodiment of the present invention.

[0025] Fig.10 It is a schematic diagram of the three-dimensional structure of the control rod in an embodiment of the present invention.

[0026] Fig.11 Schematic diagram of the three-dimensional structure of the L-shaped support plate in an embodiment of the present invention.

[0027] Fig.12 It is a schematic diagram of the three-dimensional structure of the clamping control box in an embodiment of the present invention.

[0028] In the figure: 1-welding bracket, 2-welding fixture seat, 3-L-type moving seat, 4-clamping part, 5-hydraulic cylinder, 6-telescopic head, 7-clamping lifting plate, 8-electromagnetic control integration, 9-hydraulic rotating cylinder, 10-clamping control box, 11-displacement indicating slide rail, 12-moving slider, 13-adjusting telescopic cylinder, 14-rotating axis, 15-driving connecting frame, 16-L-type support plate, 17-lifting slide plate, 18-wiring groove, 19-hydraulic pipe one, 20-hydraulic pipe two, 21-control pull rod, 22-guide slide rod, 23-hydraulic warehouse one, 24-hydraulic warehouse two, 25-clamping adjustment sleeve, 26-detection indicator, 27-fixed support rod, 28-moving pull plate, 29-buffer. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0031] See also Figure 1-Figure 12 An embodiment of the present invention provides a welding fixture for an automobile body, comprising a welding bracket 1, and further comprising: A welding fixture seat 2, wherein the welding fixture seat 2 is fixedly connected to the welding bracket 1, and a plurality of L-shaped movable seats 3 are arranged on the welding fixture seat 2, and each of the L-shaped movable seats 3 is provided with a clamping portion 4; and a clamping control mechanism, the clamping control mechanism is respectively connected to the welding fixture seat 2 and the L-shaped movable seat 3, and is electrically connected to the pressure sensor provided on the clamping portion 4, wherein the clamping control mechanism includes a clamping drive component and a detection compensation component; The clamping drive assembly is connected to the welding fixture seat 2 and the L-shaped moving seat 3 respectively, and the detection compensation assembly is connected to the clamping drive assembly and is electrically connected to the pressure sensor provided on the clamping portion 4; The clamping drive assembly drives multiple L-shaped moving seats 3 to move simultaneously on the welding fixture seat 2, and clamps the car body to be welded in multiple directions. At the same time, the pressure sensors arranged on the multiple clamping parts 4 detect the magnitude of the clamping force in multiple directions, thereby controlling the corresponding detection compensation assembly to automatically perform dynamic compensation on the parts with insufficient clamping force.

[0032] It also includes: a displacement indicating slide rail 11, the number of the displacement indicating slide rail 11 is multiple, and the multiple displacement indicating slide rails 11 are all fixedly mounted on the welding fixture seat 2; And a movable slider 12, the number of the movable slider 12 is equal to the number of the L-shaped movable seats 3, and the plurality of movable sliders 12 are respectively fixedly connected to the plurality of L-shaped movable seats 3, and are respectively slidably connected to the plurality of displacement indicating slide rails 11.

[0033] When welding a car body, first, the car body frame to be welded can be placed on the upper part of the welding fixture seat 2 and contacted with multiple L-shaped movable seats 3, wherein the number of L-shaped movable seats 3 can be set according to actual conditions, such as the welding position and the welding situation, and four are preferably used here. Then, the clamping drive assembly is started to make the clamping part 4 contact with the specified position on the car body, wherein the clamping part 4 can be provided with a corresponding clamping plate and a pressure sensor, the clamping plate is connected to the clamping part 4 by bolt connection, the pressure sensor is installed on the clamping plate, and the clamping plate can be removed from the clamping part 4 to provide a good clamping effect for different car bodies. As the pressure sensor is put into operation, when the preset value is reached, it means that the clamping is in place. At this time, the clamping drive assembly is shut down, and the detection and compensation assembly starts working. Under the monitoring and control of the detection and compensation assembly, three working conditions of the fixture can be coped with, thereby ensuring that the welding work of the car body is carried out smoothly during the welding process, that is, the first working condition. During the welding process, when a clamp is suddenly slightly damaged, the detection and compensation assembly will repair the damaged part. The clamping plate provides power to ensure the clamping effect. At the same time, the adjacent clamping plates increase the clamping force accordingly to facilitate the smooth completion of the welding work. In the second working condition, when a certain clamping plate is seriously damaged, the power provided by the detection and compensation component to the damaged clamping plate cannot achieve the clamping work on the clamping part of the body, which will affect the welding quality. The welding machine is immediately controlled to stop welding, thereby playing a monitoring and protection role. In the third working condition, before the welding operation, when the clamp contacts the designated part of the body, if a certain clamp is found to be damaged (even if it is slightly damaged), as long as the detection and compensation component is activated, the machine will be stopped immediately for inspection, thereby ensuring the smooth progress of subsequent welding work, playing the role of advance prediction and prevention. The operation is simple. When using multiple clamps to fix the body, the use of the clamps can be monitored before and during the welding operation, and when a controllable fault occurs in a clamp, the clamping force is automatically compensated, thereby avoiding the shaking or shaking of the body during the welding process, ensuring the stability of the body, which is conducive to improving the quality and effect of welding and providing convenience for the staff.

[0034] In one embodiment of the present invention, see Figure 1-Figure 12 , the clamping drive assembly comprises: A hydraulic cylinder 5, wherein the hydraulic cylinder 5 is fixedly connected to the welding fixture seat 2, and a telescopic head 6 is fixedly installed on the output end of the hydraulic cylinder 5; A clamping lifting plate 7, wherein the clamping lifting plate 7 is detachably connected to the telescopic head 6; An L-shaped support plate 16, wherein the number of the L-shaped support plates 16 is multiple, and the multiple L-shaped support plates 16 are fixedly connected to the clamping lifting plate 7; And a transmission unit, wherein the transmission unit is respectively connected to the L-shaped moving seat 3 and the L-shaped support plate 16, and is connected to the detection and compensation component.

[0035] The transmission unit comprises: A guide slide bar 22, wherein the guide slide bar 22 is fixedly connected to the L-shaped support plate 16; A lifting slide 17, wherein the lifting slide 17 is sleeved on the guide slide 22 and is slidably connected to the guide slide 22, and the lifting slide 17 is also in contact with the top end of the L-shaped support plate 16 and is connected to the detection compensation component; A driving connecting frame 15, one end of which is rotatably connected to the lifting slide plate 17; And a rotating shaft 14, wherein the rotating shaft 14 is rotatably connected to the bottom end of the L-shaped moving seat 3, and the rotating shaft 14 is also rotatably connected to the other end of the driving connecting frame 15.

[0036] When clamping the automobile body, starting the hydraulic cylinder 5 can push the telescopic head 6 and the clamping lifting plate 7 to move downward. At this time, the lifting slide plate 17 abuts against the top of the L-shaped support plate 16, so that the L-shaped support plate 16 can limit the lifting slide plate 17. As the clamping lifting plate 7 and the L-shaped support plate 16 move downward, the lifting slide plate 17 can be driven to move downward synchronously, thereby driving the driving connecting frame 15 to move and pulling the L-shaped moving seat 3 and the moving slider 12 to move. At this time, the moving slider 12 slides on the displacement indicating slide rail 11, so that the L-shaped moving seat 3 can drive the clamping part 4 to move in the direction of the automobile body until it contacts the specified part of the body, thereby realizing the clamping function. Among them, the displacement indicating slide rail 11 can record the sliding data of the moving slider 12, and cooperate with the pressure sensor on the clamping part 4 to further ensure the accuracy of the detection data. For example, if one of the two reaches the preset value and the other does not reach the preset value, it means that the clamping is abnormal, which will not be described in detail here.

[0037] In one embodiment of the present invention, see Figure 1-Figure 12 , the detection compensation component includes: A control rod 21, one end of which is fixedly connected to the lifting slide 17, and the other end of which is fixedly mounted with a movable pull plate 28; A clamping and adjusting sleeve 25, wherein the clamping and adjusting sleeve 25 is sleeved on the movable pull plate 28 and is slidably connected to the movable pull plate 28; And a compensation control unit, which is respectively connected to the clamping lifting plate 7 and the clamping adjustment sleeve 25 and generates a magnetic attraction force on the moving pull plate 28.

[0038] The compensation control unit comprises: An electromagnetic control integration 8, wherein the electromagnetic control integration 8 is fixedly mounted on the clamping lifting plate 7; A wiring trough 18, wherein the number of the wiring troughs 18 is multiple, and the multiple wiring troughs 18 are all fixedly connected to the clamping lifting plate 7 and communicated with the electromagnetic control integration 8, and the wiring troughs 18 are provided with cables; And a fixed support rod 27, one end of which is fixedly connected to the clamping lifting plate 7, and a clamping control box 10 is fixedly installed on the other end of the fixed support rod 27, and the clamping control box 10 is fixedly connected to the clamping adjustment sleeve 25.

[0039] It also includes: a detection indicator 26 , the number of the detection indicators 26 is multiple, the multiple detection indicators 26 are fixedly installed on the clamping control box 10 , and the detection indicator 26 is also electrically connected to the electromagnetic control integration 8 .

[0040] After the clamping part 4 properly clamps the designated part of the automobile body, the hydraulic cylinder 5 stops, and the electromagnetic control integration 8 starts. After the electromagnetic control integration 8 is started, the four clamping control boxes 10 are energized and the clamping control boxes 10 generate magnetic force. The clamping control box 10 can be in the form of an electromagnet. When the clamping control box 10 generates magnetism, it will generate magnetic attraction on the moving pull plate 28, so that the moving pull plate 28 has a tendency to move downward in the clamping adjustment sleeve 25, and the moving pull plate 28 will generate a pulling force on the control rod 21 and the lifting slide plate 17. When the clamping plate on the clamping part 4 is slightly damaged, the control pull rod 21 will pull the lifting slide plate 17 to slide downward on the guide slide bar 22 (if it is before the welding work, when the lifting slide plate 17 slides on the guide slide bar 22, a sensor can be provided on the guide slide bar 22 to control the welding machine to immediately stop the subsequent welding work). When the clamping plate on the clamping part 4 fails, while the welding work is in progress, the lifting slide plate 17 will pull the driving connecting frame 15 to drive the L-shaped moving seat 3 to continue to move, so that the L-shaped moving seat 3 can drive the clamping plate on the clamping part 4 to continue to move upward. The body of the welded part of the welded part is moved in the direction of the welded part to continue clamping the designated part of the body of the welded part, thereby ensuring the smooth progress of the welding work and avoiding shaking or swaying of the clamped part during welding. In addition, through the detection indicator 26, on the one hand, the displacement of the movable pull plate 28 in the clamping adjustment sleeve 25 can be detected, so as to detect whether the compensation component is successfully put into operation. On the other hand, the position of the movable pull plate 28 can be detected by multiple detection indicators 26, and the detection value can be fed back to the electromagnetic control integration 8, so that as different detection indicators 26 are put into operation, the electromagnetic control integration 8 can increase the input accordingly. The current of the clamping control box 10 corresponding to the faulty splint is used to ensure the clamping effect of the splint on the clamping part 4. When one of the designated detection indicators 26 is put into operation, it means that the downward displacement of the movable pull plate 28 is large, but the pressure sensor on the clamping part 4 has not been put into operation, indicating that the splint here may have a large fault. In order to ensure the quality and effect of welding, the welding machine can be stopped. In addition, an indicator light can be set on the detection indicator 26, so that the staff can promptly and quickly detect the faulty splint and take corresponding remedial measures to ensure the quality and effect of welding.

[0041] In one embodiment of the present invention, see Figure 1-Figure 12 , further comprising: a regulating hydraulic compartment, the regulating hydraulic compartment being fixedly connected to the L-shaped support plate 16; The regulating hydraulic chamber is composed of two parts, a hydraulic chamber 1 23 and a hydraulic chamber 2 24. Both the hydraulic chamber 1 23 and the hydraulic chamber 2 24 are fixedly connected to the L-shaped support plate 16, and piston plates are arranged in the hydraulic chamber 1 23 and the hydraulic chamber 2 24. The control rod 21 passes through the hydraulic chamber 1 23 and the hydraulic chamber 2 24 and is fixedly connected to the piston plate; And an adjacent clamping compensation unit, wherein the adjacent clamping compensation unit is respectively connected to the clamping lifting plate 7, the hydraulic bin 1 23 and the hydraulic bin 2 24.

[0042] The adjacent part clamping compensation unit comprises: A hydraulic rotating cylinder 9, wherein the number of the hydraulic rotating cylinders 9 is multiple, and the multiple hydraulic rotating cylinders 9 are all fixedly connected to the clamping lifting plate 7; A hydraulic pipe 19, one end of which is fixedly connected to the hydraulic central rotating cylinder 9 and communicates with the hydraulic central rotating cylinder 9, and the other end of which is communicated with the hydraulic chamber 2 24 on the regulating hydraulic chamber; and a hydraulic pipe 20, one end of which is fixedly connected to the hydraulic central rotating cylinder 9 and communicated with the hydraulic central rotating cylinder 9, and the other end of which is communicated with a hydraulic tank 1 23 on the adjacent regulating hydraulic tank; Wherein, both the hydraulic pipe 1 19 and the hydraulic pipe 2 20 are provided with solenoid valves, and the solenoid valves are electrically connected to the electromagnetic control integration 8 .

[0043] It also includes: an adjusting telescopic cylinder 13, the number of the adjusting telescopic cylinder 13 is equal to the number of the hydraulic rotating cylinder 9, and the plurality of adjusting telescopic cylinders 13 are fixedly mounted on the clamping lifting plate 7 and are respectively arranged opposite to the plurality of hydraulic rotating cylinders 9; The output end of the adjusting telescopic cylinder 13 is inserted into the hydraulic rotating cylinder 9 , and a sealing circular plate is fixedly installed on the output end of the adjusting telescopic cylinder 13 . The sealing circular plate is slidably installed in the hydraulic rotating cylinder 9 and is located above the hydraulic pipe 20 .

[0044] In the second working condition, if the clamping plate has a serious fault and cannot provide clamping effect, and the welding cannot be stopped, in order to ensure the quality and effect of welding, at this time, as the control rod 21 moves downward, it will push the piston plates set in the hydraulic chamber 1 23 and the hydraulic chamber 2 24 to move downward synchronously. Then, under the pushing action of the piston plate, the hydraulic oil in the hydraulic chamber 2 24 will enter the hydraulic transfer cylinder 9 through the hydraulic pipe 1 19, and flow to the hydraulic chamber 1 23 on the adjacent regulating hydraulic chamber through the hydraulic pipe 2 20. At this time, the piston plates in the adjacent regulating hydraulic chambers will move downward. Move and pull the control rod 21 adjacent to the faulty clamping plate downward, thereby increasing the clamping force of the adjacent clamping plate on the automobile body, so that when the welding machine welds the body part at the faulty clamping plate, the adjacent clamping plate further increases the clamping force to avoid the body from shaking or swaying, thereby ensuring the quality and effect of welding. Among them, electromagnetic valves are provided on the hydraulic pipe 19 and the hydraulic pipe 20. When the regulating hydraulic tank corresponding to the faulty clamping plate is actuated, the electromagnetic valves on the hydraulic pipe 19 and the hydraulic pipe 20 at other parts can be in a closed state, so as to ensure the quality and effect of welding. The hydraulic oil can only flow from the hydraulic tank 24 at the faulty clamping plate through the hydraulic pipe 19 to the hydraulic transfer cylinder 9, and then flow to the hydraulic tank 23 at the adjacent clamping plate through the hydraulic pipe 20, so as to generate a downward thrust on the control rod 21 at the adjacent clamping plate to increase the clamping force of the adjacent clamping plate. A buffer 29 is installed on each hydraulic pipe 19, and the buffer 29 is similar to the structure of an accumulator. For example, a structure with a spring and a baffle plate can be adopted. The cylinder divides the hydraulic pipe 19 into two parts, and the flow into the hydraulic tank 23 is increased. The hydraulic oil in the front part of the hydraulic pipe 19 first enters the cylinder and pushes the baffle to move. At this time, the spring is in a compressed state. When the baffle moves to a certain position, the cylinder is connected to the rear part of the hydraulic pipe 19. At this time, the hydraulic oil can enter the hydraulic transfer cylinder 9 through the rear part of the hydraulic pipe 19, and then increase the clamping force on the adjacent clamps. In addition, the adjustable telescopic cylinder 13 can be used to adjust the volume of the hydraulic transfer cylinder 9 to adaptively fine-tune the clamping force. I will not go into details here.

[0045] For the above operating system, an operation method is provided here (other operation methods may also be used or the steps of the operation method may be adjusted, which will not be described in detail here), as follows: 1. Start the clamping command The clamping command is sent, and the clamp begins to close; the pressure sensor begins to monitor the clamping force P1 in real time; 2. Pressure detection The pressure sensor detects the clamping force of the splint in real time and transmits the data to the electromagnetic control integration 8, which continuously monitors the change of the clamping force; When the clamping force P1 reaches or exceeds the preset value P2, the pressure sensor sends a signal to the electromagnetic control integrated circuit 8; after receiving the signal, the electromagnetic control integrated circuit 8 starts the subsequent control action.

[0046] 3. Activate the electromagnet The electromagnetic control integrated circuit 8 activates the corresponding electromagnet, energizes it to generate a magnetic force F1, and the magnetic force of the electromagnet causes the piston cylinder to move downward; 4. Hydraulic transmission When the piston cylinder moves downward, the hydraulic oil in the lower space is compressed, and the compressed hydraulic oil flows to the upper space of the adjacent piston cylinder through the pipeline. The hydraulic pressure in the upper space of the adjacent piston cylinder increases, pushing the piston downward and increasing the clamping force at this position; Hydraulic transmission formula: P 1 A 1 =P 2 A 2 ;in: P 1 is the initial pressure, A 1 is the initial piston area, P 2 is the ultimate pressure, A 2 is the final piston area; 5. Solenoid valve control The electromagnetic control integrated 8 controls the switching state of the electromagnetic valve according to the preset logic. When the electromagnetic valve is opened, the hydraulic oil is allowed to flow from the lower side of one piston cylinder to the upper side of another piston cylinder; when the electromagnetic valve is closed, the hydraulic oil is prevented from flowing in the opposite direction, thereby ensuring the stability of the clamping force.

[0047] Solenoid valve control formula: ; Where: Q is the flow rate, Cd is the flow coefficient, A is the valve port area, ΔP is the pressure difference, and ρ is the hydraulic oil density; 6. Stable clamping force Continue to monitor the clamping force to ensure it remains within the preset range. If the clamping force exceeds or falls below the preset value, the system will automatically adjust the output of the electromagnetic control integrated circuit to maintain a stable clamping force. 7. Release the car body After welding is completed, a release command is sent, the clamp begins to open, the electromagnetic control integrated 8 disconnects the power supply of the electromagnet, the piston cylinder returns to its initial position, the hydraulic oil returns to its initial state through the pipeline, the clamping command is closed, and all components return to standby state, ready for the next operation.

[0048] It should be noted that in the present invention, unless otherwise clearly specified and limited, the terms "slide", "rotate", "fix", "have" and the like should be understood in a broad sense, for example, it can be a welding connection, a bolt connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A welding fixture for an automobile body, comprising a welding bracket, characterized in that: Also includes: A welding fixture seat, wherein the welding fixture seat is fixedly connected to the welding bracket, and a plurality of L-shaped movable seats are arranged on the welding fixture seat, and each of the L-shaped movable seats is provided with a clamping portion; and a clamping control mechanism, the clamping control mechanism is respectively connected to the welding fixture seat and the L-shaped movable seat, and is electrically connected to a pressure sensor provided on the clamping portion, wherein the clamping control mechanism includes a clamping drive component and a detection compensation component; The clamping drive assembly is connected to the welding fixture seat and the L-shaped moving seat respectively, and the detection compensation assembly is connected to the clamping drive assembly and is electrically connected to the pressure sensor provided on the clamping part; The clamping drive assembly drives multiple L-shaped moving seats to move simultaneously on the welding fixture seat, and clamps the car body to be welded in multiple directions. At the same time, the pressure sensors arranged on the multiple clamping parts detect the clamping force in multiple directions, thereby controlling the corresponding detection compensation assembly to automatically perform dynamic compensation on the parts with insufficient clamping force.

2. The automobile body welding fixture according to claim 1, characterized in that: Also includes: A displacement indicating slide rail, wherein the number of the displacement indicating slide rails is multiple, and the multiple displacement indicating slide rails are all fixedly mounted on the welding fixture seat; And a movable slider, the number of which is equal to the number of the L-shaped movable seats, and the plurality of movable sliders are respectively fixedly connected to the plurality of L-shaped movable seats and are respectively slidably connected to the plurality of displacement indicating slide rails.

3. The automobile body welding fixture according to claim 1 or 2, characterized in that: The clamping drive assembly comprises: A hydraulic cylinder, wherein the hydraulic cylinder is fixedly connected to the welding fixture seat, and a telescopic head is fixedly installed on the output end of the hydraulic cylinder; A clamping lifting plate, wherein the clamping lifting plate is detachably connected to the telescopic head; An L-shaped support plate, wherein the number of the L-shaped support plates is multiple, and the multiple L-shaped support plates are fixedly connected to the clamping lifting plate; And a transmission unit, wherein the transmission unit is respectively connected to the L-shaped moving seat and the L-shaped supporting plate, and is connected to the detection and compensation component.

4. The automobile body welding fixture according to claim 3, characterized in that: The transmission unit comprises: A guide slide bar, the guide slide bar is fixedly connected to the L-shaped support plate; A lifting slide plate, the lifting slide plate is sleeved on the guide slide bar and is slidably connected to the guide slide bar, and the lifting slide plate is also in contact with the top end of the L-shaped support plate and is connected to the detection compensation component; A driving connecting frame, one end of which is rotatably connected to the lifting slide plate; And a rotating shaft, the rotating shaft is rotatably connected to the bottom end of the L-shaped movable seat, and the rotating shaft is also rotatably connected to the other end of the driving connecting frame.

5. The automobile body welding fixture according to claim 4, characterized in that: The detection compensation component comprises: A control rod, one end of which is fixedly connected to the lifting slide, and the other end of which is fixedly mounted with a movable pull plate; A clamping adjustment sleeve, wherein the clamping adjustment sleeve is sleeved on the movable pull plate and is slidably connected with the movable pull plate; and a compensation control unit, wherein the compensation control unit is respectively connected to the clamping lifting plate and the clamping adjustment sleeve, and generates a magnetic attraction force on the movable pull plate.

6. The automobile body welding fixture according to claim 5, characterized in that: The compensation control unit comprises: An electromagnetic control integration, the electromagnetic control integration is fixedly mounted on the clamping lifting plate; A wiring trough, wherein the number of the wiring troughs is multiple, the multiple wiring troughs are all fixedly connected to the clamping lifting plate, and are integratedly connected to the electromagnetic control, and cables are arranged in the wiring troughs; And a fixed support rod, one end of which is fixedly connected to the clamping lifting plate, and a clamping control box is fixedly installed on the other end of the fixed support rod, and the clamping control box is fixedly connected to the clamping adjustment sleeve.

7. The automobile body welding fixture according to claim 6, characterized in that: Also includes: A detection indicator, wherein the number of the detection indicators is multiple, and the multiple detection indicators are all fixedly mounted on the clamping control box, and the detection indicators are also electrically connected to the electromagnetic control integration.

8. The automobile body welding fixture according to claim 3, characterized in that: Also includes: A regulating hydraulic tank, the regulating hydraulic tank is fixedly connected to the L-shaped support plate; The regulating hydraulic chamber is composed of two parts, hydraulic chamber 1 and hydraulic chamber 2. Both hydraulic chamber 1 and hydraulic chamber 2 are fixedly connected to the L-shaped support plate, and piston plates are arranged in the hydraulic chamber 1 and hydraulic chamber 2. Wherein, the control rod passes through the hydraulic chamber 1 and the hydraulic chamber 2, and is fixedly connected to the piston plate; And an adjacent clamping compensation unit, wherein the adjacent clamping compensation unit is respectively connected to the clamping lifting plate, the hydraulic chamber one and the hydraulic chamber two.

9. The automobile body welding fixture according to claim 8, characterized in that: The adjacent part clamping compensation unit comprises: A hydraulic rotating cylinder, wherein the number of the hydraulic rotating cylinders is multiple, and the multiple hydraulic rotating cylinders are fixedly connected to the clamping lifting plate; Hydraulic pipe 1, one end of which is fixedly connected to the hydraulic central rotating cylinder and communicated with the hydraulic central rotating cylinder, and the other end of which is communicated with hydraulic chamber 2 on the regulating hydraulic chamber; and a second hydraulic pipe, one end of which is fixedly connected to the hydraulic central rotating cylinder and communicated with the hydraulic central rotating cylinder, and the other end of which is communicated with a first hydraulic tank on the adjacent regulating hydraulic tank; Wherein, the hydraulic pipe 1 and the hydraulic pipe 2 are both provided with solenoid valves, and the solenoid valves are electrically connected to the electromagnetic control integration.

10. The automobile body welding fixture according to claim 9, characterized in that: Also includes: Adjustable telescopic cylinders, the number of which is equal to the number of the hydraulic center rotating cylinders, and the plurality of adjustable telescopic cylinders are fixedly mounted on the clamping lifting plate and are respectively arranged opposite to the plurality of hydraulic center rotating cylinders; The output end of the adjusting telescopic cylinder is inserted into the hydraulic rotating cylinder, and a sealing circular plate is fixedly installed on the output end of the adjusting telescopic cylinder. The sealing circular plate is slidably installed in the hydraulic rotating cylinder and is located above the second hydraulic pipe.

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