Welding gun device with dual-drive control

Abstract

A welding gun device with dual-drive control comprises a welding gun supporting frame, a connecting shaft, a driving arm and an auxiliary movable arm, a first electrode and a first electrode cap are connected to the front end of the driving arm, a second electrode and a second electrode cap are connected to the front end of the auxiliary movable arm, and a first driving device is further installed at the lower end of the welding gun supporting frame. The first driving device enables the main arm to rotate with the first connecting shaft as a fulcrum, the upper end of the welding gun supporting frame is further provided with a second driving device, and the second driving device enables the auxiliary movable arm to rotate towards the main arm in a compensation mode with the first connecting shaft as a fulcrum. The first driving device controls the pressurization and stroke of the main arm, the second driving device controls the auxiliary movable arm to perform deformation compensation, and when the pressurization deforms towards the auxiliary movable arm, the second driving device provides certain thrust, so that the closing point of the first electrode cap and the closing point of the second electrode cap are kept at the original position and are not moved; and the welding quality and the appearance are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding guns, in particular to a welding gun device with dual drive control. Background Art

[0002] A welding gun is a tool used for welding parts made of metal. It is the part that performs the welding operation during the welding process. When used in mechanical devices for resistance spot welding of automotive panels, aerospace, shipbuilding, etc., the welding gun applies pressure over the electrode and presses it between two cylindrical electrodes. The resistance heat generated by direct current passes through the contact surface of the joint and the adjacent area and melts the parent metal to form a weld. In the resistance welding process, a conventional welding gun has a movable arm and a static arm to control the pressure and stroke. When pressurized, the movable arm rotates toward the static arm. When working, the movable and static arm electrode caps clamp two layers of sheet metal and weld by applying high pressure and releasing high current. Due to the high pressure, the closing point of the movable and static arm electrode caps deforms toward the static arm. At this time, pits will appear in the weld, affecting the welding quality and appearance. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a welding gun device with dual drive control, which has the characteristics of maintaining the closing point of the electrode cap at its original position, thereby greatly improving the welding quality and appearance.

[0004] The technical solution adopted by the utility model to solve its technical problems is a welding gun device with dual drive control, including a welding gun support frame, a first connecting shaft is installed at the middle part of the front end of the welding gun support frame, the first connecting shaft is connected to an active arm and an auxiliary arm with opposite front ends, the front end of the active arm is connected to a first electrode and a first electrode cap, the front end of the auxiliary arm is connected to a second electrode and a second electrode cap, the lower end of the welding gun support frame is also installed with a first driving device, the transmission rod of the first driving device cooperates with the active arm, the first driving device causes the active arm to rotate with the first connecting shaft as a fulcrum, and the upper end of the welding gun support frame is also installed with a second driving device, the transmission rod of the second driving device cooperates with the auxiliary arm, and the second driving device causes the auxiliary arm to perform compensatory rotation toward the active arm with the first connecting shaft as a fulcrum.

[0005] The advantages of adopting the above technical solution are: the active arm and the auxiliary arm are connected to the first connecting shaft, and the active arm is rotated by the first driving device with the first connecting shaft as the fulcrum, and the auxiliary arm is rotated by the second driving device with the first connecting shaft as the fulcrum. The first driving device controls the pressure and stroke of the active arm, and the second driving device controls the auxiliary arm to compensate for deformation. When the pressure is applied to deform the auxiliary arm, the second driving device provides a certain thrust to maintain the closing point of the first electrode cap and the second electrode cap in the original position, thereby greatly improving the welding quality and appearance.

[0006] Furthermore, two synchronously rotating frames are connected to the first connecting shaft, and the frames are arranged on both sides relative to the auxiliary boom. The lower ends of the frames are respectively fixedly connected to the rear ends of the active boom, and the transmission rod of the first driving device is also fixedly connected to the lower ends of the two frames.

[0007] The advantages of adopting the above technical solution are: by setting frames at the positions on both sides of the first connecting shaft relative to the auxiliary movable arm, the frame plates are used to realize the installation of the active arm. When the transmission rod of the first driving device moves and drives the two frame plates to rotate on the first connecting shaft, the active arm fixed to the lower ends of the two frame plates can be rotated. Moreover, with this design, the closing point of the first electrode cap and the second electrode cap will be more stable than the method of directly installing the active arm on the first connecting shaft.

[0008] Furthermore, first rotating washers are fixedly connected to both sides of the frame plate on the first connecting shaft, and the first rotating washers enable the frame plate to rotate synchronously with the first connecting shaft.

[0009] The advantages of adopting the above technical solution are: the rotation of the frame plate relative to the first connecting shaft is achieved by providing the first rotating gasket, the maintenance and replacement of the first rotating gasket is more convenient than the frame plate, and the structural design is reasonable.

[0010] Furthermore, a shaft sleeve is provided between the rear end shaft hole of the auxiliary arm and the first connecting shaft, and second rotating gaskets matching the shaft sleeve are connected to both sides of the rear end of the auxiliary arm, and the second rotating gasket is in contact with the first rotating gasket.

[0011] The advantages of adopting the above technical solution are: by arranging a sleeve in the shaft hole and arranging a second rotating gasket that cooperates with the sleeve on both sides of the rear end of the auxiliary arm, the rotation of the auxiliary arm relative to the first connecting shaft is more precise, and the rotational wear of the sleeve is reduced, and the service life will be longer. The second rotating gasket cooperates and contacts with the first rotating gasket, thereby also realizing the position limitation of the main arm and the auxiliary arm, and the structural design is compact and reasonable.

[0012] Furthermore, both ends of the first connecting shaft are fixedly connected to bearings, the bearings are arranged relative to the inner side of the welding gun support frame, and the bearings are in contact with the corresponding first rotating gaskets.

[0013] The advantages of adopting the above technical solution are: the setting of the bearing improves the supporting stability of the first connecting shaft on the active arm and the auxiliary arm, can reduce the influence of the rotation of the active arm and the auxiliary arm on the current, compensates for the shunting caused by the sliding of the existing welding gun electrode, and reduces the phenomenon of product defects caused by excessive burrs on the weld points. The bearing is in contact with the corresponding first rotating gasket, so the overall structure is more compact, and the position definition of the active arm and the auxiliary arm is more convenient and more reasonable.

[0014] Furthermore, the rear end of the frame plate is connected to a second connecting shaft, the transmission rod of the second drive device is fixed on the second connecting shaft, and the second connecting shaft is also connected to a support sleeve, which is arranged on both sides of the transmission rod of the second drive device and contacts and cooperates with the inner side surface of the corresponding frame plate.

[0015] The advantages of adopting the above technical solution are: by setting the second connecting shaft, the fixed connection between the transmission rod of the second drive device and the frame plate is more reasonable, and the setting of the support sleeve makes the structure of the two frames more stable, and also enables the transmission rod of the second drive device to more conveniently drive the frame plate to rotate.

[0016] Furthermore, a protective baffle is installed at the middle of the front end of the welding gun support frame, and the protective baffle is arranged relative to the outside of the first connecting shaft.

[0017] Advantages of adopting the above technical solution: The provision of the protective baffle can block the sparks generated during the welding process, making the first connecting shaft and various components safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a cross-sectional view of the overall structure of the utility model;

[0020] Figure 3 It is a partial structural diagram of the utility model.

[0021] In the figure: 1- welding gun support frame, 2- welding gun support frame, 3- active arm, 4- auxiliary arm, 5- first electrode, 6- first electrode, 7- second electrode, 8- second electrode cap, 9- first drive device, 10- second drive device, 11- frame plate, 12- first rotating gasket, 13- bushing, 14- second rotating gasket, 15- bearing, 16- second connecting shaft, 17- support sleeve, 18- protective baffle. DETAILED DESCRIPTION

[0022] To more clearly illustrate the embodiments of the present invention and / or the technical solutions in the prior art, the following describes specific embodiments of the present invention with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. A person skilled in the art can, without inventive effort, derive other drawings and other embodiments from these drawings. References to orientations only represent relative positional relationships between components, not absolute positional relationships.

[0023] See also Figures 1 to 3 As shown, a welding gun device with dual drive control includes a welding gun support frame 1, a first connecting shaft 2 is installed in the middle of the front end of the welding gun support frame 1, and the first connecting shaft 2 is connected to the active arm 3 and the auxiliary arm 4 with opposite front ends, the front end of the active arm 3 is connected to the first electrode 5 and the first electrode cap 6, and the front end of the auxiliary arm 4 is connected to the second electrode 7 and the second electrode cap 8. The lower end of the welding gun support frame 1 is also equipped with a first drive device 9, the first drive device 9 adopts an electric cylinder, the transmission rod of the first drive device 9 cooperates with the active arm 3, and the first drive device 9 makes the active arm 3 rotate with the first connecting shaft 2 as the fulcrum. The upper end of the welding gun support frame 1 is also equipped with a second drive device 10, the first drive device 9 also adopts an electric cylinder, and the second drive device 10 The transmission rod cooperates with the auxiliary boom 4, and the second drive device 10 enables the auxiliary boom 4 to compensate and rotate toward the active boom 3 with the first connecting shaft 2 as the fulcrum. The active boom 3 and the auxiliary boom 4 are connected to the first connecting shaft 2, and the active boom 3 is rotated with the first connecting shaft 2 as the fulcrum through the first drive device 9, and the auxiliary boom 4 is rotated with the first connecting shaft 2 as the fulcrum through the second drive device 10. The first drive device 10 controls the pressurization and stroke of the active arm 3, and the second drive device 10 controls the auxiliary boom 4 to compensate for deformation. When the pressure is applied to deform the auxiliary boom 4, the second drive device 10 provides a certain thrust to maintain the closing point of the first electrode cap 6 and the second electrode cap 8 in the original position, thereby greatly improving the welding quality and appearance.

[0024] In this embodiment, two synchronously rotating frame plates 11 are also connected to the first connecting shaft 2. The frame plates 11 are arranged on both sides relative to the auxiliary boom 4. The lower ends of the frame plates 11 are fixedly connected to the rear ends of the active boom 3 respectively. The transmission rod of the first drive device 9 is also fixedly connected to the lower ends of the two frame plates 11. By arranging the frame plates 11 at the two sides of the first connecting shaft 2 relative to the auxiliary boom 4, the active boom 3 is installed using the frame plates 11. When the transmission rod of the first drive device 9 moves and drives the two frame plates 11 to rotate on the first connecting shaft 2, the active boom 3 fixed to the lower ends of the two frame plates 11 can be rotated. In addition, compared with the method of directly installing the active boom 3 on the first connecting shaft 2, the centers of symmetry of the active boom 3 and the auxiliary boom 4 will be on the same straight line, and the closing point of the first electrode cap 6 and the second electrode cap 8 will be more stable.

[0025] In this embodiment, both sides of the frame plate 11 are fixedly connected to the first connecting shaft 2 with a first rotating gasket 12. The first rotating gasket 12 enables the frame plate 11 to rotate synchronously with the first connecting shaft 2. More specifically, the diameter of the perforation on the frame plate 11 will be larger than the diameter of the first connecting shaft 2, and the diameter of the perforation of the first rotating gasket 12 will be adapted to the diameter of the first connecting shaft 2. During installation, the first rotating gasket 12 is installed on both sides of the corresponding frame plate 11, and then the first connecting shaft 2 is passed through. In the above structure, the rotation of the frame plate 11 relative to the first connecting shaft 2 is realized by setting the first rotating gasket 12. The maintenance and replacement of the first rotating gasket 12 is more convenient than the frame plate 11, and the structural design is reasonable.

[0026] In this embodiment, a shaft sleeve 13 is provided between the rear end shaft hole of the auxiliary boom 4 and the first connecting shaft 2, and second rotating gaskets 14 that match the shaft sleeve 13 are connected to both sides of the rear end of the auxiliary boom 4. That is to say, the perforation diameter of the second rotating gasket 14 will be adapted to the diameter of the first connecting shaft 2. By arranging the shaft sleeve 13 in the shaft hole and arranging the second rotating gasket 14 on both sides of the rear end of the auxiliary boom 4, the above-mentioned design makes the rotation of the auxiliary boom 4 relative to the first connecting shaft 2 more precise, and also ensures the installation and matching stability of the shaft sleeve 13 and the auxiliary boom 4, and also reduces the rotational wear of the shaft sleeve 13, and the service life will be longer. The second rotating gasket 14 is in contact with the first rotating gasket 12. This design also realizes the position limitation of the main boom 3 and the auxiliary boom 4, and the structural design is compact and reasonable.

[0027] In this embodiment, both ends of the first connecting shaft 2 are fixedly connected with bearings 15, and the bearings 15 are arranged on the inner side of the welding gun support frame 1. The bearings 15 are in contact with the corresponding first rotating gaskets 12. The arrangement of the bearings 15 improves the supporting stability of the first connecting shaft 2 on the active arm 3 and the auxiliary arm 4, can reduce the influence of the rotation of the active arm 3 and the auxiliary arm 4 on the current, compensates for the shunt caused by the sliding of the existing welding gun electrode, and reduces the phenomenon of defective products caused by many burrs on the welds. The bearings 15 are in contact with the corresponding first rotating gaskets 12, so the overall structure is more compact, and the position definition of the active arm 3 and the auxiliary arm 4 is more convenient and more reasonable.

[0028] In this embodiment, the rear end of the frame plate 11 is connected to the second connecting shaft 16, and the transmission rod of the second drive device 10 is fixed on the second connecting shaft 16. The second connecting shaft 16 is also connected to the support sleeve 17. The support sleeve 17 is arranged on both sides relative to the transmission rod of the second drive device 10 and contacts and cooperates with the inner side surface of the corresponding frame plate 11. By setting the second connecting shaft 16, the fixed connection between the transmission rod of the second drive device 10 and the frame plate 11 is more reasonable. The setting of the support sleeve 17 makes the structure of the two frame plates 11 more stable, and also makes it more convenient for the transmission rod of the second drive device 10 to drive the frame plates to rotate.

[0029] In this embodiment, a protective baffle 18 is also installed in the middle of the front end of the welding gun support frame 1. The protective baffle 18 is arranged relative to the outside of the first connecting shaft 2. The setting of the protective baffle 18 can block the sparks generated during the welding process, making the first connecting shaft 2 and various components safer to use.

[0030] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A welding gun device with dual drive control, characterized in that: The invention comprises a welding gun support frame (1), wherein a first connecting shaft (2) is installed at the middle of the front end of the welding gun support frame (1), and an active arm (3) and an auxiliary arm (4) opposite to each other at the front end are connected to the first connecting shaft (2), a first electrode (5) and a first electrode cap (6) are connected to the front end of the active arm (3), and a second electrode (7) and a second electrode cap (8) are connected to the front end of the auxiliary arm (4), and a first driving device (9) is also installed at the lower end of the welding gun support frame (1), a transmission rod of the first driving device (9) cooperates with the active arm (3), and the first driving device (9) causes the active arm (3) to rotate with the first connecting shaft (2) as a fulcrum, and a second driving device (10) is also installed at the upper end of the welding gun support frame (1), a transmission rod of the second driving device (10) cooperates with the auxiliary arm (4), and the second driving device (10) causes the auxiliary arm (4) to perform compensatory rotation toward the active arm (3) with the first connecting shaft (2) as a fulcrum.

2. The welding gun device with dual drive control according to claim 1, characterized in that: The first connecting shaft (2) is also connected to two synchronously rotating frame plates (11), the frame plates (11) are arranged on both sides relative to the auxiliary boom (4), the lower ends of the frame plates (11) are respectively fixedly connected to the rear ends of the active boom (3), and the transmission rod of the first driving device (9) is also fixedly connected to the lower ends of the two frame plates (11).

3. The welding gun device with dual drive control according to claim 2, characterized in that: Both sides of the frame plate (11) are fixedly connected to first rotating washers (12) on the first connecting shaft (2), and the first rotating washers (12) enable the frame plate (11) to rotate synchronously with the first connecting shaft (2).

4. The welding gun device with dual drive control according to claim 3, characterized in that: A shaft sleeve (13) is provided between the rear end shaft hole of the auxiliary arm (4) and the first connecting shaft (2), and second rotating washers (14) matching the shaft sleeve (13) are connected to both sides of the rear end of the auxiliary arm (4), and the second rotating washers (14) are in contact with the first rotating washers (12).

5. The welding gun device with dual drive control according to claim 4, characterized in that: Both ends of the first connecting shaft (2) are fixedly connected to bearings (15), the bearings (15) are arranged relative to the inner side of the welding gun support frame (1), and the bearings (15) are in contact with the corresponding first rotating gaskets (12).

6. The welding gun device with dual drive control according to claim 1, characterized in that: The rear end of the frame plate (11) is connected to a second connecting shaft (16), a transmission rod of the second drive device (10) is fixed to the second connecting shaft (16), and a support sleeve (17) is also connected to the second connecting shaft (16). The support sleeve (17) is arranged on both sides of the transmission rod of the second drive device (10) and contacts and cooperates with the inner side surface of the corresponding frame plate (11).

7. The welding gun device with dual drive control according to claim 1, characterized in that: A protective baffle (18) is also installed at the middle of the front end of the welding gun support frame (1), and the protective baffle (18) is arranged relative to the outside of the first connecting shaft (2).

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