Medium-frequency internal welding multi-head spot welding machine and production line

Abstract

The invention provides a medium-frequency internal welding multi-head spot welding machine which comprises a rack, a jacking device and two sets of multi-head spot welding devices arranged on the left side and the right side of the rack correspondingly, the portion, located between the two sets of multi-head spot welding devices, of the rack is provided with a welding area, and the jacking device is installed on the rack and located below the welding area. A main sliding rail extending in the left-right direction is arranged on the rack, the two sets of multi-head spot welding devices are oppositely arranged and slidably connected to the main sliding rail, each multi-head spot welding device comprises a base, a base, a lifting mechanism and two sets of welding mechanisms, the lifting mechanisms are installed on the bases and used for driving the bases to move up and down, the bases are slidably connected with the main sliding rail, and the welding mechanisms are installed on the bases. The two welding mechanisms are oppositely arranged front and back. The intermediate-frequency internal welding multi-head spot welding machine can be used for welding and fixing some shell structures needing to be spliced, it is ensured that the welding position of each time is accurate and regular, the problem that later-stage grinding is needed due to the welding problem is solved, assembly line type production can be matched, and the use requirement of automatic production is completely met.

Description

Technical Field

[0001] The invention relates to a medium frequency internal welding multi-head spot welding machine and a production line. Background Art

[0002] In the field of welding production, the metal shells of some electrical appliances are usually welded and fixed, such as the shell of a range hood. Currently, the shell of a range hood is mainly welded by manual spot welding, but manual spot welding has problems such as slow welding speed, uneven welding points, and irregular welding points. As a result, the welding points need to be polished in the later stage, which not only affects the production progress, but also increases the polishing process.

[0003] Therefore, it is necessary to make further improvements. Summary of the invention

[0004] To solve the above problems, the present invention proposes a medium frequency internal welding multi-head spot welding machine and a production line. The multi-head spot welding machine is suitable for automated assembly line operations, replacing manual welding, greatly improving welding production efficiency and ensuring uniform and neat welding spots.

[0005] The present invention proposes a medium-frequency internal welding multi-head spot welding machine, which includes a frame, a lifting device and two groups of multi-head spot welding devices respectively arranged on the left and right sides of the frame, the frame is located between the two groups of multi-head spot welding devices and has a welding area, the lifting device is installed on the frame and is located below the welding area, the frame is provided with a main slide rail extending in the left and right directions, the two groups of multi-head spot welding devices are relatively arranged and slidably connected to the main slide rail, the multi-head spot welding device includes a base, a pedestal, a lifting mechanism and two groups of welding mechanisms, the lifting mechanism is installed on the base and is used to drive the base The base is slidably connected to the main slide rail, and the two sets of welding mechanisms are arranged front to back relatively. The welding mechanism includes a cross rail, a first lifting cylinder, a second lifting cylinder, an upper electrode head and a lower electrode head. The cross rail is installed on the base and extends along the front and back direction. The first lifting cylinder is slidably connected to the cross rail. The first lifting cylinder is connected to the lower electrode head and is used to drive it to move up and down. The second lifting cylinder is installed on the base. The second lifting cylinder is connected to the upper electrode head and is used to drive it to move up and down. The upper electrode head corresponds to the lower electrode head up and down and cooperates in welding.

[0006] In one or more embodiments, the welding mechanism has two, three or four upper electrode heads.

[0007] In one or more embodiments, a first motor, a first screw and a first slide are provided on the cross rail. The first screw is arranged along the length direction of the cross rail. The first motor is used to drive the first screw to rotate. The first slide is slidingly connected to the cross rail and is threadedly connected to the first screw. The first lifting cylinder is installed on the first slide.

[0008] In one or more embodiments, the base is connected to the pedestal via a plurality of vertical slide rails, the lifting mechanism is a third lifting cylinder, and a cylinder shaft of the third lifting cylinder is connected to the base.

[0009] In one or more embodiments, two sets of driving mechanisms are provided on the frame, respectively used to drive two sets of multi-head spot welding devices, the driving mechanism includes a second motor, a second screw, a second slide rail and a second slide seat, the second slide rail is installed on one side of the main slide rail, the second screw extends along the length direction of the second slide rail, the second motor is installed on the second slide rail and drives the second screw to rotate, the second slide seat is slidably connected to the second slide rail and is threadedly connected to the second screw, and the second slide seat is connected to the base of the multi-head spot welding device.

[0010] In one or more embodiments, the lifting device includes a fixed plate, a movable plate and a fourth lifting cylinder. The fixed plate is installed and fixed on the frame, the movable plate is arranged above the fixed plate, the fourth lifting cylinder is installed on the fixed plate, the cylinder shaft of the fourth lifting cylinder is connected to the movable plate, and a plurality of positioning columns are arranged on the upper end surface of the movable plate.

[0011] In one or more embodiments, guide rails are provided on both sides of the movable plate, the guide rails are extended downward, and the fixed plate is provided with guide rail slides slidably connected to the guide rails.

[0012] In one or more embodiments, the frame is provided with positioning devices on the left and right sides of the welding area, and the positioning devices are provided with retractable positioning clamps.

[0013] The present invention also provides a production line of a medium-frequency internal welding multi-head spot welding machine, which includes an annular circulation conveyor belt and multiple medium-frequency internal welding multi-head spot welding machines mentioned above, and the multiple medium-frequency internal welding multi-head spot welding machines are arranged in sequence along the annular circulation conveyor belt.

[0014] The beneficial effects of the present invention are as follows: the medium-frequency internal welding multi-head spot welding machine can weld and fix some outer shell structures that need to be spliced, and ensure that the position of each welding is accurate and regular, which can avoid the need for later grinding due to welding problems, and can cooperate with assembly line production. Multiple medium-frequency internal welding multi-head spot welding machines can be configured to be responsible for the welding needs of each process and each point, fully realizing the use requirements of automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a multi-head spot welding machine for internal frequency welding in this embodiment;

[0016] Figure 2 Schematic diagram of the structure of the multi-head spot welding device of this embodiment;

[0017] Figure 3 for Figure 2 Schematic diagram of the structure from another angle;

[0018] Figure 4 It is a structural schematic diagram of the production line of the medium frequency internal welding multi-head spot welding machine in this embodiment. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0020] Please see attached Figure 1-3 The present invention provides a medium-frequency internal welding multi-head spot welding machine, which includes a frame 1, a lifting device and two groups of multi-head spot welding devices respectively arranged on the left and right sides of the frame, the frame is located between the two groups of multi-head spot welding devices and has a welding area, the lifting device is installed on the frame 1 and is located below the welding area, when the medium-frequency internal welding multi-head spot welding machine is used in conjunction with an assembly line, the product on the assembly line is lifted to be separated from the assembly line by the lifting device, and is lifted to the welding area for welding work, the frame is provided with a main slide rail 2 extending in the left and right directions, the two groups of multi-head spot welding devices are arranged relatively and slidably connected to the main slide rail, the multi-head spot welding device includes a base 3, a base 4, and a lift The invention relates to a structure and two sets of welding mechanisms, the lifting mechanism is installed on the base and is used to drive the base to move up and down, the base 3 is slidably connected to the main slide rail 2, the two sets of welding mechanisms are arranged front to back relatively, the welding mechanism includes a cross rail 5, a first lifting cylinder 6, a second lifting cylinder 7, an upper electrode head 8 and a lower electrode head 9, the cross rail is installed on the base 4 and extends along the front and back direction, the first lifting cylinder 5 is slidably connected to the cross rail, the first lifting cylinder is connected to the lower electrode head 9 and is used to drive it to move up and down, the second lifting cylinder 7 is installed on the base 4, the second lifting cylinder is connected to the upper electrode head 8 and is used to drive it to move up and down, the upper electrode head corresponds to the lower electrode head up and down and cooperates in welding. The multi-head spot welding device slides along the main slide rail, so that the welding mechanism has the ability to move left and right. The first lifting cylinder slides along the cross rail, so that the lower electrode head has the ability to move forward and backward. The lifting work of the first lifting cylinder enables the lower electrode head to move up and down. Therefore, during welding, by performing the above adjustments in the left and right, front and back, and up and down directions, the lower electrode head can be made to enter the inner side of the desired welding product. Correspondingly, the upper electrode head is lifted and lowered by the second lifting cylinder, so that the upper electrode head on the outside of the desired welding product cooperates with the lower electrode head on the inside of the desired welding product to achieve welding.

[0021] The welding mechanism has two, three or four upper electrode heads 8. By moving the lower electrode head forward and backward, the lower electrode head cooperates with the upper electrode heads for welding to achieve multi-point welding, making the product structure more solid after welding.

[0022] The cross rail 5 is provided with a first motor 10, a first screw and a first slide 11. The first screw is arranged along the length direction of the cross rail. The first motor is used to drive the first screw to rotate. The first slide 11 is slidably connected to the cross rail 5 and is screwed to the first screw. The first lifting cylinder 6 is installed on the first slide. Under the cooperation of the connection structure between the first slide, the first screw and the cross rail, the first slide is made to reciprocate forward and backward along the cross rail through the forward and reverse rotation of the first motor. In addition, the cylinder can also be used to drive the first slide to reciprocate forward and backward. Specifically, the cylinder is fixed on the machine base or the cross rail, and then the cylinder shaft is connected to the first slide.

[0023] The base 4 is connected to the base 3 via a plurality of vertical slide rails 12, and the lifting mechanism is a third lifting cylinder 13, the cylinder shaft of the third lifting cylinder is connected to the base 4, and a plurality of vertical slide rails are provided, so that the base can be smoothly lifted and lowered under the drive of the third lifting cylinder. The number of the third lifting cylinders is preferably two or more.

[0024] The frame 1 is provided with two sets of driving mechanisms for driving two sets of multi-head spot welding devices respectively. The driving mechanisms include a second motor 14, a second screw, a second slide rail 15 and a second slide seat 16. The second slide rail is installed on one side of the main slide rail 2. The second screw extends along the length direction of the second slide rail. The second motor is installed on the second slide rail and drives the second screw to rotate. The second slide seat 16 is slidably connected to the second slide rail and is screwed with the second screw. The second slide seat is connected to the base 3 of the multi-head spot welding device. The second motor drives the second screw to rotate. The second slide seat, in cooperation with the second screw and the main slide rail, can make the base reciprocate left and right along the main slide rail.

[0025] The lifting device includes a fixed plate 17, a movable plate 18 and a fourth lifting cylinder 19. The fixed plate is fixedly mounted on the frame 1, the movable plate is arranged above the fixed plate, the fourth lifting cylinder 19 is mounted on the fixed plate 17, the cylinder shaft of the fourth lifting cylinder is connected to the movable plate 18, and the cylinder shaft of the fourth lifting cylinder is extended and retracted to lift or lower the movable plate. A plurality of positioning columns 20 are arranged on the upper end surface of the movable plate, and the positioning columns are used to connect and position with the tooling plate.

[0026] In order to make the movable plate more stable in lifting, guide rails 21 are provided on both sides of the movable plate 18. The guide rails are extended downward, and the fixed plate 17 is provided with guide rail slides 22 slidably connected to the guide rails.

[0027] The frame 1 is provided with positioning devices 23 on the left and right sides of the welding area. The positioning devices are provided with retractable positioning clamps. The positioning devices have a cylinder body that drives the positioning clamps to move. The cylinder body drives the positioning clamps to move left and right, thereby clamping the products to be welded.

[0028] See attached Figure 4A production line of a medium-frequency internal welding multi-head spot welding machine includes a ring-shaped circulating conveyor belt 24 and a plurality of the above-mentioned medium-frequency internal welding multi-head spot welding machines. The plurality of medium-frequency internal welding multi-head spot welding machines are arranged in sequence along the ring-shaped circulating conveyor belt. By arranging a plurality of medium-frequency internal welding multi-head spot welding machines to be responsible for different welding positions of the products to be welded, fully automated welding production is realized.

[0029] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A medium frequency internal welding multi-head spot welding machine, characterized in that: The invention comprises a frame (1), a lifting device and two groups of multi-head spot welding devices respectively arranged on the left and right sides of the frame, wherein the frame is located between the two groups of multi-head spot welding devices and has a welding area, the lifting device is installed on the frame (1) and is located below the welding area, the frame is provided with a main slide rail (2) extending in the left and right directions, the two groups of multi-head spot welding devices are arranged opposite to each other and are slidably connected to the main slide rail, the multi-head spot welding device comprises a base (3), a pedestal (4), a lifting mechanism and two groups of welding mechanisms, the lifting mechanism is installed on the base and is used to drive the pedestal to move up and down, the base (3) slides with the main slide rail (2) The two welding mechanisms are arranged front to back relative to each other, and the welding mechanisms include a transverse rail (5), a first lifting cylinder (6), a second lifting cylinder (7), an upper electrode head (8) and a lower electrode head (9). The transverse rail is installed on the base (4) and extends in the front-to-back direction. The first lifting cylinder (5) is slidably connected to the transverse rail. The first lifting cylinder is connected to the lower electrode head (9) and is used to drive it to move up and down. The second lifting cylinder (7) is installed on the base (4). The second lifting cylinder is connected to the upper electrode head (8) and is used to drive it to move up and down. The upper electrode head corresponds to the lower electrode head in the upper and lower directions and cooperates in welding.

2. A medium frequency internal welding multi-head spot welding machine according to claim 1, characterized in that: The welding mechanism has two, three or four upper electrode heads (8).

3. A medium frequency internal welding multi-head spot welding machine according to claim 2, characterized in that: The cross rail (5) is provided with a first motor (10), a first screw and a first slide seat (11). The first screw is arranged along the length direction of the cross rail. The first motor is used to drive the first screw to rotate. The first slide seat (11) is slidably connected to the cross rail (5) and is threadedly connected to the first screw. The first lifting cylinder (6) is installed on the first slide seat.

4. The medium frequency internal welding multi-head spot welding machine according to claim 3, characterized in that: The base (4) and the base (3) are connected via a plurality of vertical (12) slide rails; the lifting mechanism is a third lifting cylinder (13); and the cylinder shaft of the third lifting cylinder is connected to the base (4).

5. The medium frequency internal welding multi-head spot welding machine according to claim 1, characterized in that: The frame (1) is provided with two sets of driving mechanisms for driving two sets of multi-head spot welding devices respectively. The driving mechanisms include a second motor (14), a second screw, a second slide rail (15) and a second slide seat (16). The second slide rail is installed on one side of the main slide rail (2). The second screw extends along the length direction of the second slide rail. The second motor is installed on the second slide rail and drives the second screw to rotate. The second slide seat (16) is slidably connected to the second slide rail and is screwed to the second screw. The second slide seat is connected to the base (3) of the multi-head spot welding device.

6. The medium frequency internal welding multi-head spot welding machine according to claim 1, characterized in that: The lifting device comprises a fixed plate (17), a movable plate (18) and a fourth lifting cylinder (19); the fixed plate is fixedly mounted on the frame (1); the movable plate is arranged above the fixed plate; the fourth lifting cylinder (19) is mounted on the fixed plate (17); the cylinder shaft of the fourth lifting cylinder is connected to the movable plate (18); and a plurality of positioning columns (20) are arranged on the upper end surface of the movable plate.

7. A medium frequency internal welding multi-head spot welding machine according to claim 6, characterized in that: Guide rails (21) are arranged on both sides of the movable plate (18), the guide rails are extended downward, and the fixed plate (17) is provided with guide rail sliding seats (22) slidably connected to the guide rails.

8. The medium frequency internal welding multi-head spot welding machine according to claim 1, characterized in that: The frame (1) is provided with positioning devices (23) on the left and right sides of the welding area, and the positioning devices are provided with retractable positioning clamping plates.

9. A production line of a medium frequency internal welding multi-head spot welding machine, characterized in that: It comprises an endless circulating conveyor belt (24) and a plurality of medium frequency internal welding multi-head spot welding machines according to any one of claims 1 to 8, wherein the plurality of medium frequency internal welding multi-head spot welding machines are arranged in sequence along the endless circulating conveyor belt.

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