Welding forming tool for automobile body parts

Abstract

The invention discloses an automobile body part welding forming tool, and relates to the technical field of automobile part welding, the automobile body part welding forming tool comprises a rotary welding table, a clamp is arranged at the top of the rotary welding table, and an automobile body part is fixed to the top of the rotary welding table through the clamp; a welding mechanical arm used for welding automobile body parts and a resistance welding mechanism are arranged on one side of the rotary welding table, and the resistance welding mechanism is located on one side of the top of the clamp. The electric resistance welding mechanism and the blowing cleaning mechanism are distributed by 90 degrees through installation of the connecting mechanism, on one hand, the position of an electrode in the electric resistance welding mechanism can be changed so as to be suitable for welding work of automobile body parts at different positions, and the application range is expanded; on the other hand, impurities adhered to the welding position of the automobile body part can be removed through gas blown out by the blowing cleaning mechanism, the situation that the impurities pollute the electrode tip and affect the welding quality is prevented, the impurities can be removed before welding is started, and damage to the electrode caused by subsequent polishing is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts welding, in particular to a welding and forming tool for automobile body parts. Background Art

[0002] The car body is a complex system composed of multiple key components. It mainly includes basic components such as the body shell, doors, windows, front sheet metal parts, and interior and exterior decorative parts of the body. In addition, body accessories such as seats, ventilation, heating, cooling and air conditioning devices are also indispensable parts, which together provide passengers with a comfortable and safe riding environment. The body shell, as the installation foundation of all body parts, is a solid spatial structure composed of main load-bearing components such as longitudinal beams, cross beams and pillars and connected sheet metal parts. At the same time, the body shell also integrates multiple functional materials and coatings such as sound insulation, heat insulation, vibration resistance, corrosion resistance and sealing to improve the overall performance of the vehicle.

[0003] To ensure the structural strength of the car body, welding is used to connect the parts. Welding can provide stronger structural strength than bolting, which is crucial to ensure the safety of the car in a collision. The welding of existing car body parts is mostly controlled by computers, which has strong flexibility and mobility. It is a fast and cost-effective connection method suitable for large-scale automobile manufacturing.

[0004] As shown in an automotive sheet metal automatic welding robot with the prior art publication number CN117047247B, the welding robot adopts a resistance welding method, and welds automotive parts through two electrode heads distributed up and down, and removes impurities adhering to the electrodes by friction through the setting of a cleaning mechanism. However, there are still the following shortcomings: First, the electrode heads of the welding robot are distributed up and down, that is, it can only weld automotive parts horizontally located between the two electrode heads distributed up and down, and cannot weld automotive parts vertically located on one side of the electrode head, and the scope of use is limited; Second, although impurities adhering to the electrode can be removed by friction, the friction method is also easy to cause wear to the electrode, affecting the service life of the electrode. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a welding and forming tool for automobile body parts. With the help of the installation of a connecting mechanism, the resistance welding mechanism and the air blowing and cleaning mechanism are distributed at 90 degrees. On the one hand, the position of the electrode in the resistance welding mechanism can be changed by rotating the resistance welding mechanism and the air blowing and cleaning mechanism to be suitable for welding work of automobile body parts in different positions, thereby expanding the scope of use. On the other hand, the gas blown out by the air blowing and cleaning mechanism can be used to remove impurities adhered to the welding position of the automobile body parts to prevent them from contaminating the electrode head and affecting the welding quality. The present invention can remove impurities before welding begins to avoid damage to the electrode caused by subsequent grinding.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a welding and forming tool for automobile body parts, comprising a rotary welding table, a clamp is provided on the top of the rotary welding table, and the automobile body parts are fixed on the top of the rotary welding table by the clamp, and a welding mechanical arm and a resistance welding mechanism for welding automobile body parts are provided on one side of the rotary welding table, and the resistance welding mechanism is located on one side of the top of the clamp;

[0007] The top of the resistance welding mechanism is movably mounted on one end of the welding robot arm through a connecting mechanism, and an air blowing cleaning mechanism for cleaning dust at the welding position of automobile body parts is also installed on the connecting mechanism, and the resistance welding mechanism and the air blowing cleaning mechanism are distributed at 90 degrees;

[0008] The resistance welding mechanism includes two electrodes that are distributed in mirror images on the left and right, and the air blowing and cleaning mechanism includes two nozzles that are distributed in mirror images on the front and back. The distance between the electrodes and the connecting mechanism is equal to the distance between the nozzles and the connecting mechanism. The two electrodes and the two nozzles are swapped in shape after the connecting mechanism is rotated to alternately weld and clean automobile body parts in different positions.

[0009] Preferably, the connection mechanism comprises a rotating motor b rotatably mounted at one end of the welding robot arm, a U-shaped connecting frame is mounted at the output end at the bottom of the rotating motor b, a rotating shaft is movably connected to the inside of the U-shaped connecting frame through a bearing, a right-angle joint is passed through the outer end of the rotating shaft, the right-angle joint is fixed to the rotating shaft, the front end of the rotating shaft passes through the U-shaped connecting frame and is fixedly connected to the rotating motor a, and the rotating motor a is located at the front side of the U-shaped connecting frame;

[0010] The right-angle joint comprises two vertically distributed mounting ports, the resistance welding mechanism is connected to the inside of one of the mounting ports of the right-angle joint, and the air blowing and cleaning mechanism is connected to the inside of the other mounting port of the right-angle joint.

[0011] Preferably, the resistance welding mechanism also includes an electrode mounting frame for mounting two electrodes, the electrode mounting frame is arranged on the top of the electrode, a telescopic arm a is fixed on the top of the electrode mounting frame for driving the electrode to move up and down, and the top of the telescopic arm a is fixedly mounted inside a mounting port of the right-angle joint.

[0012] Preferably, the air blowing cleaning mechanism further comprises two air cylinders for respectively supplying air to the inside of the two nozzles, and the outer walls of the two air cylinders are fixed with mechanical clamps that can be opened and closed, and one end of the mechanical clamp is connected to a telescopic arm b, and one end of the telescopic arm b is fixed inside the other mounting port of the right-angle joint;

[0013] The distance between the nozzle and the right-angle joint installation port is equal to the distance between the electrode and the right-angle joint installation port, and the nozzle for gas outlet and the electrode for welding are arranged at the same position, so that the nozzle can be accurately positioned to the position where the electrode is located by rotation;

[0014] The structure of the telescopic arm b in the present invention is the same as that of the telescopic arm a, and can be any one of linear moving elements such as a cylinder, an oil cylinder, a hydraulic cylinder or an electric push rod, and the present invention does not impose any further restrictions.

[0015] Preferably, an air charging mechanism for supplying air to the inside of the two air cylinders is provided on the rear side of the rotary welding table;

[0016] The inflation mechanism includes a U-shaped air pipe, the two ends of the bottom of the U-shaped air pipe are respectively connected to the interior of two air cylinders, an inflation pipe is fixedly connected to the middle position of the top of the U-shaped air pipe, the end of the inflation pipe away from the U-shaped air pipe is connected to an air valve joint, the top of the air valve joint is connected to a high-pressure gas storage tank, and the high-pressure gas storage tank stores compressed high-pressure gas.

[0017] Preferably, the U-shaped air tube and the air inflation tube are both flexible tubes that can be bent, so that the U-shaped air tube and the air inflation tube can bend and stretch following the movement of the welding robot arm and the mechanical gripper.

[0018] Preferably, a gas tank moving frame is provided outside the high-pressure gas tank, and the gas tank moving frame has two moving wheels for pushing the high-pressure gas tank to move for inflation.

[0019] Preferably, a frame is fixed to the bottom of the welding robot arm by bolts, and the frame stands on the ground.

[0020] Compared with the prior art, the present invention provides a welding and forming tool for automobile body parts, which has the following beneficial effects:

[0021] 1. The present invention uses the installation of the connecting mechanism to make the resistance welding mechanism and the air blowing cleaning mechanism be distributed at 90 degrees. On the one hand, the position of the electrode in the resistance welding mechanism can be changed by rotating the resistance welding mechanism and the air blowing cleaning mechanism to be suitable for welding work of automobile body parts at different positions, thereby expanding the scope of use. On the other hand, the gas blown out by the air blowing cleaning mechanism can be used to remove impurities adhered to the welding position of the automobile body parts to prevent them from contaminating the electrode head and affecting the welding quality. The present invention can remove impurities before welding begins to avoid damage to the electrode caused by subsequent grinding.

[0022] 2. In the present invention, the distance between the nozzle and the right-angle joint is the same as the distance between the electrode and the right-angle joint, so that after rotating the electrode and the nozzle by 90°, the nozzle can be moved to the welding position under the action of the welding robot arm to accurately locate the welding position for cleaning, thereby reducing the cleaning area and improving the cleaning efficiency.

[0023] 3. The present invention installs the air blowing cleaning mechanism and the resistance welding mechanism at one end of the welding robot arm in a 90° distribution through a right-angle joint, so that the cleaning and welding work can be carried out alternately without stopping the machine and will not affect the normal progress of the welding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a first view of the overall structure of the present invention;

[0025] Figure 2 A second view of the overall structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the welding robot arm, the resistance welding mechanism, the air blowing and cleaning mechanism and the air supply mechanism of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of automobile body parts, rotary welding table and fixture;

[0028] Figure 5 It is a structural schematic diagram of the air supply mechanism and the air blowing and cleaning mechanism of the present invention;

[0029] Figure 6 For the present invention Figure 5 Enlarged view of part A in the middle;

[0030] Figure 7 An exploded view of the resistance welding mechanism, the air blowing and cleaning mechanism and the connecting mechanism of the present invention;

[0031] Figure 8 It is a schematic diagram of the resistance welding mechanism, the air blowing and cleaning mechanism and the connecting mechanism of the present invention;

[0032] Fig. 9It is a schematic diagram of the electrode and the nozzle of the present invention after being rotated 90 degrees counterclockwise;

[0033] In the figure:

[0034] 1 rotary welding table, 2 fixture, 3 welding robot arm, 4 resistance welding mechanism, 5 air blowing and cleaning mechanism, 6 charging mechanism, 7 frame, 8 connecting mechanism;

[0035] 41 electrode, 42 electrode mounting frame, 43 telescopic arm a;

[0036] 51 nozzle, 52 air cylinder, 53 mechanical gripper, 54 telescopic arm b;

[0037] 61U-type air pipe, 62 inflation pipe, 63 air valve joint, 64 high-pressure gas storage tank, 65 gas storage tank mobile rack;

[0038] 81 right angle joint, 82 U-shaped connection frame, 83 rotating motor a, 84 rotating motor b, 85 rotating shaft. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] like Figure 1 and 4 As shown, the present invention provides a welding and forming tool for automobile body parts, including a rotary welding table 1, a fixture 2 is provided on the top of the rotary welding table 1, and the automobile body parts are fixed on the top of the rotary welding table 1 through the fixture 2. A welding mechanical arm 3 and a resistance welding mechanism 4 for welding automobile body parts are provided on one side of the rotary welding table 1, and the resistance welding mechanism 4 is located on one side of the top of the fixture 2. The bottom of the welding mechanical arm 3 is fixed with a frame 7 by bolts, and the frame 7 stands on the ground;

[0041] The top end of the resistance welding mechanism 4 is movably mounted on one end of the welding robot arm 3 through a connecting mechanism 8, and an air blowing cleaning mechanism 5 for cleaning dust at the welding position of automobile body parts is also installed on the connecting mechanism 8. Figure 2 , 3, 5 and 7-9, the connecting mechanism 8 includes a rotating motor b84 rotatably mounted at one end of the welding robot arm 3, and a U-shaped connecting frame 82 is mounted at the output end at the bottom of the rotating motor b84. The rotating motor b84 can drive the resistance welding mechanism 4 and the air blowing cleaning mechanism 5 to rotate in a horizontal plane; a rotating shaft 85 is movably connected to the inside of the U-shaped connecting frame 82 through a bearing, and a right-angle joint 81 is passed through the outer end of the rotating shaft 85, and the right-angle joint 81 is fixed to the rotating shaft 85. The front end of the rotating shaft 85 passes through the U-shaped connecting frame 82 and is fixedly connected to a rotating motor a83, and the rotating motor a83 is located at the front side of the U-shaped connecting frame 82. The rotating motor a83 can rotate in a vertical plane with the rotating shaft 85 as the rotating axis, and the driving of the rotating motor a83 helps to change the position of the resistance welding mechanism 4 and the air blowing cleaning mechanism 5;

[0042] Moreover, if Figure 7 As shown, the right-angle joint 81 includes two vertically distributed mounting ports, the resistance welding mechanism 4 is internally connected to one mounting port of the right-angle joint 81, and the air blowing and cleaning mechanism 5 is internally connected to the other mounting port of the right-angle joint 81.

[0043] The resistance welding mechanism 4 and the air blowing cleaning mechanism 5 of the present invention are distributed at 90 degrees. Specifically, Figure 2 , 3 As shown in 5-9, the resistance welding mechanism 4 includes two electrodes 41 distributed in a left-right mirror image, and also includes an electrode mounting frame 42 for mounting the two electrodes 41, the electrode mounting frame 42 is arranged on the top of the electrode 41, and a telescopic arm a43 for driving the electrode 41 to move up and down is fixed on the top of the electrode mounting frame 42, and the top of the telescopic arm a43 is fixedly mounted inside a mounting port of the right-angle joint 81;

[0044] Before welding, adjust the positions of the two electrodes 41 according to the positions of the automobile body parts. Figure 2 As shown, the two electrodes 41 are controlled to be vertically downward, and then the welding robot arm 3 moves the electrode 41 to above the welding position, and then the telescopic arm a43 is extended to move the electrode 41 to the vicinity of the welding position, and finally the electrode mounting frame 42 is used to control the two electrodes 41 to contact the welding position of the automobile parts, so that the electrodes 41 locally heat the automobile body parts to a molten or plastic state, and pressurize them for welding at the same time;

[0045] If the horizontal position of the automobile body parts requires two electrodes 41 to be welded in the form of an upper and lower distribution, the right-angle joint 81 needs to be driven by the rotating motor a83 to rotate 90° clockwise with the rotating shaft 85 as the axis, that is, the electrode 41 is rotated to Figure 8The position of the middle nozzle 51 is converted from a horizontal state to a vertical state, and then the electrode 41 is moved to the welding position for welding by controlling the welding robot arm 3 and the telescopic arm a43. Compared with the prior art, the present invention can change the shape of the electrode 41, so that it can be applied to welding work at different positions of automobile body parts, thereby expanding the scope of use;

[0046] In order to prevent the impurities adhered to the automobile body parts from adhering to the end of the electrode 41, the air blowing cleaning mechanism 5 in the present invention can clean the welding position and remove the impurities before welding. Figure 2 , 3 As shown in 5-9, the air blowing cleaning mechanism 5 includes two nozzles 51 distributed in a front-to-back mirror image, and also includes two air cylinders 52 for respectively supplying air to the inside of the two nozzles 51, and the outer walls of the two air cylinders 52 are fixed with mechanical clamps 53 that can be opened and closed, and one end of the mechanical clamp 53 is connected to a telescopic arm b54, and one end of the telescopic arm b54 is fixed inside another mounting port of the right-angle joint 81. It is worth noting that the structure of the telescopic arm b54 in the present invention is the same as that of the telescopic arm a43, and can be any one of the linear moving originals such as a cylinder, an oil cylinder, a hydraulic cylinder or an electric push rod, and the present invention is not further limited here;

[0047] In the present invention, the distance between the electrode 41 and the right-angle joint 81 is equal to the distance between the nozzle 51 and the right-angle joint 81, that is, the length of the nozzle 51 and the length of the electrode 41 are set to be the same, which helps to accurately move the nozzle 51 to the position where the electrode 41 is located after rotating it 90°, and then further move it to the position where the electrode 41 is located during welding, such as Fig. 9 As shown, the nozzle 51 originally in a horizontal state becomes a vertical state, so that the nozzle 51 can accurately clean the welding position;

[0048] Moreover, an air charging mechanism 6 for supplying air to the inside of the two air cylinders 52 is provided at the rear side of the rotary welding table 1. Figure 2 , 3 As shown in Figures 5 and 6, the inflation mechanism 6 includes a U-shaped air pipe 61, the two ends of the bottom of the U-shaped air pipe 61 are respectively connected to the inside of the two air cylinders 52, and the middle position of the top of the U-shaped air pipe 61 is fixedly connected with an inflation pipe 62. The U-shaped air pipe 61 and the inflation pipe 62 are both flexible pipes that can be bent, so that they are suitable for changes in the position of the nozzle 51. The end of the inflation pipe 62 away from the U-shaped air pipe 61 is connected to a gas valve connector 63, and the top of the gas valve connector 63 is connected to a high-pressure gas storage tank 64. The high-pressure gas storage tank 64 stores compressed high-pressure gas. The high-pressure gas storage tank 64 is provided with a gas storage tank moving frame 65 on the outside, and the gas storage tank moving frame 65 has two moving wheels for pushing the high-pressure gas storage tank 64 to move for inflation;

[0049] Before welding, the nozzle 51 is first rotated to the position of the electrode 41 by driving the rotating motor a83, and then the welding robot arm 3 and the telescopic arm b54 move the nozzle 51 to the welding position according to the steps of the welding robot arm 3 and the telescopic arm a43 driving the electrode 41 to move to the welding position, and then the two nozzles 51 are controlled by the mechanical clamp 53 to move toward the welding position of the automobile body parts. After moving to the vicinity, the high-pressure gas in the high-pressure gas storage tank 64 is opened by opening the gas valve joint 63, so that the high-pressure gas can be input into the nozzle 51 through the charging pipe 62, the U-shaped gas pipe 61, and the gas cylinder 52, and finally blown out through the nozzle 51 and blown to the welding position to blow off impurities adhering to the automobile body parts, so as to avoid the impurities adhering to the electrode 41 when the electrode 41 is welding and affecting the welding quality;

[0050] Moreover, the blowing position of the nozzle 51 in the present invention is accurately positioned, and its position is locked directly with reference to the position of the electrode 41 during welding, which is beneficial to reducing the blowing area. In addition, the ejected gas is high-pressure gas with a certain impact force, so it can accurately remove impurities adhered to the welding position, with high cleaning efficiency and short time consumption.

[0051] The present invention installs the air blowing cleaning mechanism 5 and the resistance welding mechanism 4 at one end of the welding robot arm 3 in a 90° distribution, so that cleaning and welding work can be performed alternately without stopping the machine and will not affect the normal progress of the welding work.

[0052] In addition, it is worth mentioning that the welding robot arm 3, resistance welding mechanism 4, air blowing and cleaning mechanism 5, inflation mechanism 6 and connecting mechanism 8 in the present invention are all automatically controlled by a computer. The control program design is a mature technical solution in the prior art and will not be further elaborated here.

[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A welding and forming tool for automobile body parts, comprising a rotary welding table (1), a clamp (2) being provided on the top of the rotary welding table (1), and the automobile body parts are fixed on the top of the rotary welding table (1) by the clamp (2). Features: A welding mechanical arm (3) and a resistance welding mechanism (4) for welding automobile body parts are provided on one side of the rotary welding table (1); the resistance welding mechanism (4) is located on one side of the top of the clamp (2); The top end of the resistance welding mechanism (4) is movably mounted on one end of the welding mechanical arm (3) via a connecting mechanism (8); an air blowing cleaning mechanism (5) for cleaning dust at the welding position of the automobile body parts is also mounted on the connecting mechanism (8); the resistance welding mechanism (4) and the air blowing cleaning mechanism (5) are arranged at 90 degrees. The resistance welding mechanism (4) comprises two electrodes (41) which are arranged in a mirror image on the left and right, and the air blowing cleaning mechanism (5) comprises two nozzles (51) which are arranged in a mirror image on the front and back. The distance between the electrode (41) and the connecting mechanism (8) is equal to the distance between the nozzle (51) and the connecting mechanism (8). After the two electrodes (41) and the two nozzles (51) are rotated through the connecting mechanism (8), their positions are swapped to alternately weld and clean different positions of automobile body parts.

2. The automobile body parts welding and forming tool according to claim 1, Features: The connection mechanism (8) comprises a rotating motor b (84) rotatably mounted at one end of the welding robot arm (3); a U-shaped connecting frame (82) is mounted at the output end at the bottom of the rotating motor b (84); a rotating shaft (85) is movably connected to the inside of the U-shaped connecting frame (82) via a bearing; a right-angle joint (81) passes through the outer end of the rotating shaft (85); the right-angle joint (81) is fixed to the rotating shaft (85); a front end of the rotating shaft (85) passes through the U-shaped connecting frame (82) and is fixedly connected to the rotating motor a (83); the rotating motor a (83) is located at the front side of the U-shaped connecting frame (82); The right-angle joint (81) comprises two vertically distributed mounting openings, the resistance welding mechanism (4) is internally connected to one of the mounting openings of the right-angle joint (81), and the air blowing and cleaning mechanism (5) is internally connected to the other mounting opening of the right-angle joint (81).

3. The automobile body parts welding and forming tool according to claim 2, Features: The resistance welding mechanism (4) further comprises an electrode mounting frame (42) for mounting two electrodes (41); the electrode mounting frame (42) is arranged on the top of the electrode (41); a telescopic arm a (43) for driving the electrode (41) to move up and down is fixed on the top of the electrode mounting frame (42); the top of the telescopic arm a (43) is fixedly mounted inside a mounting opening of the right-angle joint (81).

4. The automobile body parts welding and forming tool according to claim 3, Features: The air blowing cleaning mechanism (5) further comprises two air cylinders (52) for respectively supplying air to the inside of the two nozzles (51); the outer walls of the two air cylinders (52) are fixed with mechanical clamps (53) capable of opening and closing; one end of the mechanical clamps (53) is connected with a telescopic arm b (54); one end of the telescopic arm b (54) is fixed inside another mounting opening of the right-angle joint (81); The distance between the nozzle (51) and the installation opening of the right-angle joint (81) is equal to the distance between the electrode (41) and the installation opening of the right-angle joint (81).

5. The automobile body parts welding and forming tool according to claim 4, Features: The rear side of the rotary welding table (1) is provided with an air charging mechanism (6) for supplying air to the inside of the two air cylinders (52); The inflation mechanism (6) comprises a U-shaped air pipe (61), the two ends of the bottom of the U-shaped air pipe (61) are respectively connected to the inside of two air cylinders (52), the middle position of the top of the U-shaped air pipe (61) is fixedly connected to an inflation pipe (62), one end of the inflation pipe (62) away from the U-shaped air pipe (61) is connected to an air valve joint (63), the top of the air valve joint (63) is connected to a high-pressure gas storage tank (64), and the high-pressure gas storage tank (64) stores compressed high-pressure gas.

6. The automobile body parts welding and forming tool according to claim 5, Features: The U-shaped air tube (61) and the inflation tube (62) are both flexible tubes that can be bent.

7. The automobile body parts welding and forming tool according to claim 5, Features: A gas tank moving frame (65) is arranged outside the high-pressure gas tank (64), and the gas tank moving frame (65) has two moving wheels for pushing the high-pressure gas tank (64) to move for inflation.

8. The automobile body parts welding and forming tool according to claim 1, Features: The bottom of the welding robot arm (3) is fixed with a frame (7) by means of bolts, and the frame (7) stands on the ground.

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