A spot welding device for automobile parts

Abstract

The present invention discloses a spot welding device for automobile parts, which relates to the technical field of arc welding, including a welding gun and a welding head fixedly mounted thereon, and also including: an expansion frame, which is arranged on one side of the welding gun; a side plate, which is fixedly mounted on one side of the welding gun, and a magnet is rotatably mounted on the side plate; a magnet is rotatably mounted on the side plate; a sliding frame, which is slidably mounted on the side plate; after sliding the sliding frame outward, the magnet is driven to rotate out of the expansion frame to rotate the thin plate to the welding head. The present invention can adjust the position of the thin plate by adjusting the position of the welding gun, so that the thin plate fits on the car frame, and then welding is performed. After the welding is completed, the thin plate and the car frame are connected once, and the welding gun is moved away at this time, and the magnet will also be removed from the welded thin plate. As the welding is completed, the sliding frame is reset, the magnet will be reset, and another thin plate will extend out of the expansion frame at the same time. At this time, the magnet will continue to be adsorbed with the thin plate for the next round of welding.

Description

Technical Field

[0001] The invention relates to the technical field of arc welding, and in particular to a spot welding device for automobile parts. Background Art

[0002] Spot welding refers to a welding method that uses a cylindrical electrode to form a weld between the contact surfaces of two overlapping workpieces. During spot welding, pressure is first applied to make the workpieces in close contact, and then the current is turned on. The contact between the workpieces melts under the action of resistance heat, and a weld is formed after cooling. Spot welding is mainly used for welding sheet metal stampings with a thickness of less than 4mm, and is particularly suitable for welding automobile bodies and compartments, and aircraft fuselages;

[0003] When welding a car body, it is usually necessary to weld some stamping parts to the car frame and other parts. The existing welding method is that the staff places a thin plate on the car frame, then picks up a welding gun, and then brings the welding head on the welding gun close to the thin plate for electric welding. However, in the mass production process, some factories use visual robots to grab the thin plates and install them on the car frame, and then use welding guns for welding. However, when using the visual robot, various debugging is often required, which makes the use cost high. In a small number of factories, workers still take the thin plates and then use welding guns for welding. Therefore, the operation during the welding process is extremely complicated. It is necessary to take the car frame, then take the thin plate and place it on the car frame, then take the welding gun, and then use the welding gun to weld. The entire welding operation is cumbersome and the welding efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to provide a spot welding device for automobile parts to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a spot welding device for automobile parts, comprising a welding gun and a welding head fixedly mounted thereon, and also comprising: an expansion frame, which is arranged on one side of the welding gun; a side plate, which is fixedly mounted on one side of the welding gun, and a magnet is rotatably mounted on the side plate; a magnet is rotatably mounted on the side plate; a sliding frame, which is slidably mounted on the side plate; after the sliding frame is slid outward, the magnet will be driven out of the expansion frame to rotate the thin plate to the welding head, and the expansion frame will rotate upward to avoid it.

[0006] Preferably, a friction rod is fixedly mounted on the sliding frame, a connecting frame is fixedly mounted on the magnet, a rotating shaft is fixedly mounted on the connecting frame, and the friction rod is in contact with the rotating shaft.

[0007] Preferably, a bottom end of the side plate is fixedly mounted with a base frame, a rotating rod is rotatably mounted on the base frame, a connecting plate is fixedly mounted on the rotating rod, and the expansion frame is fixedly mounted on the connecting plate;

[0008] A convex plate is fixedly mounted on the rotating rod, and a follower rod is fixedly mounted on the friction rod.

[0009] Preferably, a limit block is fixedly installed on the side plate, and a limit strip is fixedly installed on the rotating shaft.

[0010] Preferably, a slide rod is installed inside the rotating rod along its axial direction, an inner plate is installed inside the connecting plate, a square plate is fixedly installed on the inner plate, an inclined groove is provided on the square plate, and a round block is fixedly installed on the slide rod;

[0011] A connecting shaft is rotatably installed in the expansion frame, a gear is fixedly installed on the top of the connecting shaft, a tooth groove begins to be formed at one end of the built-in plate located in the expansion frame, and an abutment rod is fixedly installed on the bottom end of the connecting shaft;

[0012] An extrusion block is slidably mounted on one end of the rotating rod close to the welding gun along its radial direction, a displacement block is fixedly mounted on the side wall of the side plate, and an arc groove is arranged on one end of the displacement block close to the extrusion block.

[0013] Preferably, an extension plate is fixedly mounted on one end of the slide bar away from the side plate, a first outer plate is fixedly mounted on the connecting plate, and a first spring is fixedly mounted between the first outer plate and the extension plate.

[0014] Preferably, the bottom end of the expansion frame begins to have an opening.

[0015] Preferably, a long shaft is rotatably mounted on the inner wall of the opening, a pressure block is fixedly mounted on the long shaft, a clamp rod is slidably mounted on the inner wall of the opening, an insertion rod is fixedly mounted on the clamp rod, and a card frame is fixedly mounted on the pressure block.

[0016] Preferably, a second outer plate is fixedly mounted on the expansion frame, and a second spring is fixedly mounted between the second outer plate and the clamping rod.

[0017] Preferably, the first outer panel and the second outer panel are both L-shaped.

[0018] In the above technical scheme, the present invention provides a spot welding device for automobile parts, which has the following beneficial effects: when the staff performs spot welding, after placing the car frame on the limiting tooling, it is only necessary to take the welding gun and make the welding gun close to the car frame. Before welding, the sliding frame is slid first, which will drive the magnet to rotate. The thin plate can be rotated to the bottom of the welding head through the magnet. At this time, the position of the thin plate can be adjusted by adjusting the position of the welding gun, so that the thin plate fits on the car frame, and then welding is performed. After the welding is completed, the thin plate and the car frame are connected again. At this time, the welding gun is moved away, and the magnet will also be removed from the welded thin plate. As the welding is completed, the sliding frame is reset, the magnet will be reset, and another thin plate will extend out of the expansion frame. At this time, the magnet will continue to be adsorbed with the thin plate for the next round of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1-2 All of them are schematic diagrams of three-dimensional structures provided by embodiments of the present invention;

[0021] Figure 3 The embodiment of the present invention provides Figure 2 A schematic diagram of the structure at A;

[0022] Figure 4 The embodiment of the present invention provides Figure 1 Schematic diagram of the structure at B;

[0023] Figure 5 A schematic diagram of a portion of the structure of a side panel provided in an embodiment of the present invention;

[0024] Figure 6 The embodiment of the present invention provides Figure 5 Schematic diagram of the structure at C;

[0025] Figure 7 A schematic diagram of a portion of the structure of a built-in board provided in an embodiment of the present invention;

[0026] Figure 8 The embodiment of the present invention provides Figure 7 Schematic diagram of the structure at D;

[0027] Fig. 9 A schematic diagram of a partial structure of a displacement block provided in an embodiment of the present invention;

[0028] Fig.10 A schematic diagram of a portion of the structure of an expansion frame provided in an embodiment of the present invention;

[0029] Fig.11 A partial structural schematic diagram of a pressure block provided in an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1. Welding gun; 2. Welding head; 31. Side plate; 32. Slide frame; 33. Friction rod; 34. Rotating shaft; 35. Connecting frame; 36. Magnet; 37. Limiting strip; 38. Limiting block; 4. Thin plate; 51. Base frame; 52. Rotating rod; 53. Connecting plate; 54. Convex plate; 55. Follow-up rod; 61. Sliding rod; 62. Round block; 63. Built-in plate; 64. Square plate; 65. Extension plate; 66. First outer plate; 67. Connecting shaft; 68. Abutting rod; 69. Extrusion block; 610. Displacement block; 71. Clamping rod; 72. Pressure block; 73. Card frame; 74. Inserting rod; 75. Second outer plate; 76. Long axis; 8. Extension frame. DETAILED DESCRIPTION

[0032] 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.

[0033] See also Figure 1-11 A spot welding device for automobile parts includes a welding gun 1 and a welding head 2 fixedly mounted thereon, and also includes: an expansion frame 8, which is arranged on one side of the welding gun 1; a side plate 31, which is fixedly mounted on one side of the welding gun 1, and a magnet 36 is rotatably mounted on the side plate 31; the magnet 36 is rotatably mounted on the side plate 31; a sliding frame 32, which is slidably mounted on the side plate 31; after the sliding frame 32 is slid outward, the magnet 36 will be driven out of the expansion frame 8 to rotate the thin plate 4 onto the welding head 2, and the expansion frame 8 will rotate upward to avoid it.

[0034] In another embodiment of the present invention: a friction rod 33 is fixedly mounted on the sliding frame 32, a connecting frame 35 is fixedly mounted on the magnet 36, a rotating shaft 34 is fixedly mounted on the connecting frame 35, and the friction rod 33 and the rotating shaft 34 are in contact;

[0035] The sliding frame 32 will drive the friction rod 33 to move, and the movement of the friction rod 33 will drive the shaft 34 to rotate, and the shaft 34 will drive the magnet 36 to rotate. Fig.10When welding is not required, the magnet 36 is located on the right side. At this time, the magnet 36 is located on one side of the expansion frame 8 and is connected to the thin plate 4 extending from the bottom side of the expansion frame 8. At this time, the magnet 36 absorbs the thin plate 4 extending from the bottom layer. Then, when welding is required, the staff slides the slide frame 32 forward. At this time, the slide frame 32 drives the friction rod 33 to move, and the friction rod 33 will drive the rotating shaft 34 to rotate, and the rotating shaft 34 will drive the connecting frame 35 and the magnet 36 to rotate. At this time, the magnet 36 will rotate 180° to move away from the expansion frame 8. At the same time, the thin plate 4 absorbed by the magnet 36 will be moved to the bottom of the welding head 2. Then the staff can move the entire welding gun 1 so that the welding gun 1 is close to the automotive accessories. At the same time, the thin plate 4 can be conveniently placed where welding is required, and then the welding gun 1 can be started for rapid welding.

[0036] In another embodiment of the present invention: a bottom end of the side plate 31 is fixedly mounted with a bottom frame 51, a rotating rod 52 is rotatably mounted on the bottom frame 51, a connecting plate 53 is fixedly mounted on the rotating rod 52, and the expansion frame 8 is fixedly mounted on the connecting plate 53;

[0037] A convex plate 54 is fixedly mounted on the rotating rod 52, and a follower rod 55 is fixedly mounted on the friction rod 33;

[0038] The follower rod 55 moves synchronously with the friction rod 33. When the sliding frame 32 is pushed forward to drive the friction rod 33 to move, the friction rod 33 will synchronously drive the follower rod 55 to move. When the follower rod 55 moves, it will abut against the convex plate 54, and the convex plate 54 is set on the bottom side of the rotating rod 52. At this time, as the convex plate 54 is pushed forward, the convex plate 54 will drive the rotating rod 52 to rotate, and at this time the rotating rod 52 will drive the expansion frame 8 to rotate upward to avoid contact between the expansion frame 8 and the weldment.

[0039] In another embodiment of the present invention: a limit block 38 is fixedly installed on the side plate 31, and a limit strip 37 is fixedly installed on the rotating shaft 34;

[0040] When welding is required, the sliding frame 32 is first slid forward, and the sliding frame 32 drives the friction rod 33 to move. At this time, the follower rod 55 has not yet contacted the convex plate 54. At this time, the friction rod 33 will drive the rotating shaft 34 to rotate, so that the magnet 36 drives the thin plate 4 to rotate toward the direction of the welding head 2 until the limit bar 37 contacts the limit block 38. At this time, the rotating shaft 34 can no longer rotate, and at the same time, the thin plate 4 will be driven by the magnet 36 to be located below the welding head 2 for subsequent welding. At this time, as the sliding frame 32 continues to move, the friction rod 33 will drive the follower rod 55 to continue to move, but at this time, the rotating shaft 34 is blocked by the limit bar 37 and the limit block 38 and can no longer rotate. At the same time, the follower rod 55 will be squeezed onto the convex plate 54, thereby pushing the convex plate 54 to rotate, and the convex plate 54 will drive the rotating rod 52 to rotate. At this time, the rotating rod 52 will drive the expansion frame 8 to rotate upward through the connecting plate 53, so that the expansion frame 8 can avoid.

[0041] In another embodiment of the present invention, a slide bar 61 is slidably mounted inside the rotating rod 52 along its axial direction, an inner plate 63 is slidably mounted inside the connecting plate 53, a square plate 64 is fixedly mounted on the inner plate 63, an inclined groove is formed on the square plate 64, and a round block 62 is fixedly mounted on the slide bar 61;

[0042] A connecting shaft 67 is rotatably installed in the expansion frame 8, a gear is fixedly installed on the top of the connecting shaft 67, a tooth groove begins to be formed at one end of the built-in plate 63 located in the expansion frame 8, and an abutment rod 68 is fixedly installed on the bottom end of the connecting shaft 67;

[0043] An extrusion block 69 is slidably mounted on one end of the rotating rod 52 close to the welding gun 1 along its radial direction, and a displacement block 610 is fixedly mounted on the side wall of the side plate 31, and an arc groove is provided on one end of the displacement block 610 close to the extrusion block 69;

[0044] The size of the round block 62 matches the size of the inclined groove. When the follower rod 55 pushes the convex plate 54 to drive the rotating rod 52 to rotate, the rotating rod 52 will drive the slide bar 61 therein to rotate. At this time, the squeezing block 69 on the slide bar 61 will contact the arc groove on the displacement block 610. The arc groove will be closer to the rotating rod 52 as it moves downward. Therefore, when the rotating rod 52 drives the squeezing block 69 to rotate downward, Figure 8-9 The extrusion block 69 is pressed inward by the arc groove, and at the same time, since the extrusion block 69 and the end of the slide bar 61 close to each other are both provided with a bevel, the extrusion block 69 will squeeze the slide bar 61, so that the slide bar 61 moves away from the welding gun 1. At this time, the slide bar 61 will drive the round rod thereon to move in the bevel groove, thereby pushing the square plate 64 and the built-in plate 63 to move into the expansion frame 8. At this time, the built-in plate 63 will drive the gear to rotate through the tooth groove thereon, so that the connecting shaft 67 rotates, and when the connecting shaft 67 rotates, it will drive the abutment rod 68 to rotate;

[0045] When the slide frame 32 is slid forward to move the thin plate 4 to the bottom of the welding head 2, the expansion frame 8 will rotate upward, and while the expansion frame 8 rotates upward, the slide bar 61 will drive the built-in plate 63 to move, thereby pushing the abutment rod 68 to rotate, and the abutment rod 68 is flush with the bottom thin plate 4 of the expansion frame 8. Therefore, when the magnet 36 takes away the original bottom thin plate 4, the upper thin plate 4 will naturally fall down. At this time, as the abutment rod 68 rotates, it will push the bottom thin plate 4 to slide out of the expansion frame 8, so that the bottom thin plate 4 One end of the expansion frame 8 extends out from the expansion frame 8. When welding is completed, the sliding frame 32 is moved back in the direction of the handle. At this time, the abutment rod 68 will also leave the convex plate 54 first. At this time, the expansion frame 8 will be restored to its original position due to its own weight. At this time, the rotating rod 52 will rotate and reset, thereby driving the extrusion block 69 away from the displacement block 610. At this time, when the expansion frame 8 is horizontal, the magnet 36 will also be driven by the friction rod 33 to move toward the position of the expansion frame 8 until the magnet 36 is reset and is located above the bottom sheet 4, thereby being adsorbed together with the sheet 4 again.

[0046] In another embodiment of the present invention: an extension plate 65 is fixedly installed on one end of the slide bar 61 away from the side plate 31, a first outer plate 66 is fixedly installed on the connecting plate 53, and a first spring is fixedly installed between the first outer plate 66 and the extension plate 65;

[0047] When the slide bar 61 moves in the direction away from the welding gun 1 through the extrusion block 69, the first spring will be compressed. As the expansion frame 8 rotates and resets, the first spring will push the extension plate 65 to push the slide bar 61 to reset, thereby resetting the built-in plate 63. At the same time, the built-in plate 63 will drive the abutment rod 68 to rotate outward and reset.

[0048] In another embodiment of the present invention: the bottom end of the expansion frame 8 begins to have an opening;

[0049] The height of the opening at the bottom of the expansion frame 8 is greater than the thickness of the thin plate 4, so that when the magnet 36 rotates, it is convenient to bring the thin plate 4 inside it out of the opening.

[0050] In another embodiment of the present invention: a long shaft 76 is rotatably mounted on the inner wall of the opening, a pressure block 72 is fixedly mounted on the long shaft 76, a clamping rod 71 is slidably mounted on the inner wall of the opening, an insertion rod 74 is fixedly mounted on the clamping rod 71, and a clamping frame 73 is fixedly mounted on the pressure block 72;

[0051] When the locking cam 72 is in the closed position, the locking cam 72 will be in the closed position, and the locking cam 72 will be in the closed position when the locking cam 72 is in the closed position. In the expansion frame 8, since one end of the bottom thin plate 4 extends out from the expansion frame 8, a small space is left behind the bottom thin plate 4 in the expansion frame 8. At this time, the pressure block 72 will penetrate into the space. At the same time, the thickness of the pressure block 72 is greater than the size of the thin plate 4. At the same time, one end of the pressure block 72 located in the expansion frame 8 is provided with a chamfer or a rounded corner. Therefore, when the pressure block 72 rotates toward the expansion frame 8, it will bear the pressure of the upper thin plate 4, thereby reducing the pressure on the bottom thin plate 4, so as to facilitate the subsequent magnet 36 to drive the bottom thin plate 4 to move away.

[0052] In another embodiment of the present invention: a second outer plate 75 is fixedly installed on the expansion frame 8, and a second spring is fixedly installed between the second outer plate 75 and the clamping rod 71;

[0053] When the locking cam 72 is in the unlocking state, the locking cam 73 is in the unlocking state, and the locking cam 73 is in the unlocking state, so that the locking cam 73 can be locked to the unlocking state.

[0054] In another embodiment of the present invention: the first outer plate 66 and the second outer plate 75 are both L-shaped;

[0055] The first outer plate 66 is located on the outside of the connecting plate 53, and the second outer plate 75 is located on the outside of the expansion frame 8, so that it is easier to install springs with stronger elasticity on the first outer plate 66 and the second outer plate 75 to facilitate the reset of the sliding rod 61 and the clamping rod 71.

[0056] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A spot welding device for automobile parts, comprising a welding gun (1) and a welding head (2) fixedly mounted thereon, characterized in that: Also includes: An expansion frame (8) is arranged on one side of the welding gun (1); A side plate (31) fixedly mounted on one side of the welding gun (1), wherein a magnet (36) is rotatably mounted on the side plate (31); A magnet (36) rotatably mounted on the side plate (31); A sliding frame (32) is slidably mounted on the side plate (31); After the sliding frame (32) is slid outward, the magnet (36) is driven to rotate out of the expansion frame (8) to rotate the thin plate (4) onto the welding head (2), and at the same time, the expansion frame (8) is rotated upward to avoid it; A friction rod (33) is fixedly mounted on the sliding frame (32), a connecting frame (35) is fixedly mounted on the magnet (36), a rotating shaft (34) is fixedly mounted on the connecting frame (35), and the friction rod (33) and the rotating shaft (34) are in contact with each other; A bottom end of the side plate (31) is fixedly mounted with a bottom frame (51), a rotating rod (52) is rotatably mounted on the bottom frame (51), a connecting plate (53) is fixedly mounted on the rotating rod (52), and the expansion frame (8) is fixedly mounted on the connecting plate (53); A convex plate (54) is fixedly mounted on the rotating rod (52), and a follower rod (55) is fixedly mounted on the friction rod (33); A slide bar (61) is slidably mounted inside the rotating rod (52) along its axial direction, an inner plate (63) is slidably mounted inside the connecting plate (53), a square plate (64) is fixedly mounted on the inner plate (63), an inclined groove is formed on the square plate (64), and a round block (62) is fixedly mounted on the slide bar (61); A connecting shaft (67) is rotatably mounted in the expansion frame (8), a gear is fixedly mounted on the top of the connecting shaft (67), a tooth groove is formed at one end of the built-in plate (63) located in the expansion frame (8), and an abutment rod (68) is fixedly mounted on the bottom end of the connecting shaft (67); An extrusion block (69) is slidably mounted along the radial direction of the rotating rod (52) at one end close to the welding gun (1), a displacement block (610) is fixedly mounted on the side wall of the side plate (31), and an arc groove is provided at one end of the displacement block (610) close to the extrusion block (69); An extension plate (65) is fixedly mounted on one end of the slide bar (61) away from the side plate (31), a first outer plate (66) is fixedly mounted on the connecting plate (53), and a first spring is fixedly mounted between the first outer plate (66) and the extension plate (65); The bottom end of the expansion frame (8) begins to have an opening; A long shaft (76) is rotatably mounted on the inner wall of the opening, a pressure block (72) is fixedly mounted on the long shaft (76), a clamping rod (71) is slidably mounted on the inner wall of the opening, an insertion rod (74) is fixedly mounted on the clamping rod (71), and a clamping frame (73) is fixedly mounted on the pressure block (72).

2. The spot welding device for automobile parts according to claim 1, characterized in that: A limit block (38) is fixedly mounted on the side plate (31), and a limit strip (37) is fixedly mounted on the rotating shaft (34).

3. The spot welding device for automobile parts according to claim 1, characterized in that: A second outer plate (75) is fixedly mounted on the expansion frame (8), and a second spring is fixedly mounted between the second outer plate (75) and the clamping rod (71).

4. The spot welding device for automobile parts according to claim 3, characterized in that: The first outer plate (66) and the second outer plate (75) are both L-shaped.

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