High-flexibility double-robot welding workstation for transformer cooling fins

Abstract

The utility model provides a transformer cooling fin high-flexibility double-robot welding work station which comprises a pair of clamps, a pair of welding robots, a pair of welding robots, a pair of welding robots, a pair of welding robots and a pair of welding robots, wherein the clamps are the same in structure and are oppositely arranged in the X direction; each clamp comprises a Y-direction limiting unit, a clamping unit and a pressing unit, and the Y-direction limiting unit, the clamping unit and the pressing unit are sequentially distributed in the Y direction and all arranged on the side, facing the product to be welded, of the clamp support. The two ends of the Y-direction limiting unit are detachably connected with the clamp support. The Y-direction distance between the pressing unit and the product pipe can be adjusted; the to-be-welded product comprises a product pipe; the end, in the Y direction, of the product pipe of the product to be welded abuts against the Y-direction limiting unit or the clamp support, and the other end, in the Y direction, of the product pipe abuts against a pressing block of the pressing unit. Wherein one clamp and one welding robot body are fixed to the base and arranged on the bottom frame, and the bottom frame and the base are connected through the X-direction moving unit. The flexible welding device can achieve automatic welding and is suitable for products of different specifications so as to achieve flexible welding.

Description

Technical Field

[0001] This utility model belongs to the field of heat sink welding technology, and in particular relates to a highly flexible dual-robot welding workstation for transformer heat sinks. Background Technology

[0002] The existing welding method for transformer heat sinks involves manual fixing of the product onto a manually operated rotating base. Bolts and pressure plates are used, along with a wrench to secure the product to the base. The base is then manually operated to rotate the welding surface to a convenient position for the welder. Therefore, all steps in this existing welding method are performed manually, which has the following disadvantages:

[0003] 1. For the specific operation of large heat exchange fins (2.5 meters long, 1.8 meters wide, and weighing in the ton range), since it is a manual operation, oversights are inevitable, so the safety of the operators cannot be effectively guaranteed.

[0004] 2. Because operators are susceptible to fatigue and external interference, the consistency, yield rate, and efficiency of manually welded products cannot be effectively guaranteed. Summary of the Invention

[0005] The purpose of this invention is to provide a highly flexible dual-robot welding workstation for transformer heat sinks to solve the aforementioned technical problems. The technical solution adopted is as follows:

[0006] A highly flexible dual-robot welding workstation for transformer heat sinks includes:

[0007] A pair of identical clamps are arranged opposite each other along the X-axis, forming a space for placing the product 2 to be welded; wherein each clamp includes:

[0008] The Y-direction limiting unit, clamping unit, and pressing unit are distributed sequentially along the Y-direction and are all located on the side of the fixture bracket facing the product 2 to be welded.

[0009] Both ends of the Y-axis limiting unit are detachably connected to the clamp bracket; the Y-axis distance between the clamping unit and the product tube is adjustable; the product 2 to be welded includes the product tube;

[0010] The product tube of the product to be welded 2 has one end along the Y direction abutting against the Y direction limiting unit or clamp bracket, and the other end along the Y direction abutting against the clamping block of the clamping unit.

[0011] One of the fixtures and one of the welding robot bodies are fixed to the base 3 and are both set on the base frame 16. The base frame 16 and the base 3 are connected by the X-axis moving unit 5.

[0012] Preferably, the Y-direction limiting unit includes:

[0013] The limiting block is connected to the fixture bracket by fasteners and protrudes toward the product 2 to be welded;

[0014] The limiting rod is integrally formed with the limiting block and extends along the Y direction. The groove at its end is engaged with the end of the clamp bracket.

[0015] Preferably, the clamp bracket includes a bracket body, on which a connector that cooperates with a limiting rod is provided, and the connector forms the end of the clamp bracket.

[0016] Preferably, the clamping unit includes a pair of support blocks distributed along the Y direction, and the support blocks have slots that mate with the product tube.

[0017] Preferably, the clamping unit further includes:

[0018] Support, mounted on the clamp bracket;

[0019] An adjustment seat, disposed on the support, is a hollow structure;

[0020] An adjusting screw extends along the Y direction and is threadedly connected to the adjusting seat. Both ends of the adjusting screw pass through the adjusting seat, and the end facing the product tube is connected to the clamping block.

[0021] Preferably, it further includes a Y-axis moving unit corresponding to the clamp, wherein one Y-axis moving unit is disposed between the corresponding clamp and the base 3, and the other Y-axis moving unit is disposed between the corresponding clamp and the base frame 16.

[0022] Preferably, it further includes a flipping unit 4, which is configured to correspond to the fixture, and its output end is connected to the corresponding fixture.

[0023] Preferably, the product to be welded 2 further includes several spot welding connectors, and all heat sinks in the product to be welded 2 are welded to the spot welding connectors.

[0024] Preferably, the X-axis moving unit 5 includes:

[0025] Base, set on the underframe;

[0026] A gear is connected to the output shaft of a motor, which is mounted on a base.

[0027] The rack and pinion are fixed to the base 3 along the X direction and mesh with the gear.

[0028] Compared with the prior art, the advantages of this utility model are:

[0029] 1. It eliminates safety hazards for operators, specifically by allowing workers to observe the work from a distance while the work station is in operation;

[0030] 2. While improving quality, production efficiency is also improved. Specifically, the use of welding robots has greatly improved product consistency, welding speed and yield rate. The walking and turning table (turning unit 4) can be used to operate products with a length ≤2.5 meters and a width ≤1.8 meters.

[0031] 3. It saves companies labor costs. Attached Figure Description

[0032] Figure 1 Front view of a highly flexible dual-robot welding workstation for transformer heat sinks;

[0033] Figure 2 A top view of a highly flexible dual-robot welding workstation for transformer heat sinks;

[0034] Figure 3 This is a side view of fixture number one;

[0035] Figure 4 This is a top view of fixture number one;

[0036] Figure 5 A 3D view of a highly flexible dual-robot welding workstation for transformer heat sinks;

[0037] Figure 6 A three-dimensional view including the product to be welded and fixture number one;

[0038] Figure 7 This is a structural diagram of the first Y-axis limiting unit;

[0039] Figure 8 This is a schematic diagram showing the installation positions of the No. 1 Y-axis limiting unit and the No. 1 clamp bracket;

[0040] Figure 9 This is a schematic diagram showing the interaction between the No. 1 Y-axis limiting unit and the No. 1 clamp bracket;

[0041] Figure 10 This is a three-dimensional view of the first clamping unit;

[0042] Figure 11 The distribution diagram shows the X-axis and Y-axis moving units;

[0043] Figure 12 This is a structural diagram of the first clamping unit;

[0044] Figure 13 This is a schematic diagram of the installation of the X-axis moving unit;

[0045] Figure 14 This is a structural diagram of the X-axis moving unit;

[0046] Figure 15 This is a schematic diagram of the installation of the flip unit.

[0047] Among them, 1-Welding robot body, 2-Product to be welded, 3-Base, 4-Flipping unit, 5-X-direction moving unit;

[0048] 6 - Fixture No. 1, 7 - Fixture No. 2;

[0049] 8-1 Y-axis moving unit,

[0050] 9- No. 1 clamp bracket; 90- No. 1 bracket body; 91- No. 1 connector;

[0051] 10-Y-direction limiting unit No. 1, 101-Limiting block No. 1, 102-Limiting rod No. 1

[0052] 11-First clamping block, 12-First support block;

[0053] 13-Support No. 1, 14-Adjusting Seat No. 1, 15-Adjusting Screw No. 1, 16-Base Frame. Detailed Implementation

[0054] The highly flexible dual-robot welding workstation for transformer heat sinks of this utility model will be described in more detail below with reference to the schematic diagrams, which illustrate preferred embodiments of this utility model. It should be understood that those skilled in the art can modify the utility model described herein while still achieving the advantageous effects of this utility model. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit this utility model.

[0055] like Figures 1-12 A highly flexible dual-robot welding workstation for transformer heat sinks includes:

[0056] A pair of identical fixtures are arranged opposite each other along the X-axis, forming a space for placing the product 2 to be welded; each fixture includes:

[0057] The Y-direction limiting unit, clamping unit, and pressing unit are distributed sequentially along the Y-direction and are all located on the side of the fixture bracket facing the product 2 to be welded.

[0058] Both ends of the Y-axis limiting unit are detachably connected to the clamp bracket; the Y-axis distance between the clamping unit and the product tube is adjustable;

[0059] The product tube of product 2 to be welded has one end along the Y direction abutting against the Y direction limiting unit or clamp bracket, and the other end along the Y direction abutting against the clamping block of the clamping unit.

[0060] One of the fixtures and one of the welding robot bodies are mounted on the base frame 16, and the base frame 16 and the base 3 are connected by an X-axis moving unit 5. Figures 13-14 As shown.

[0061] Product 2 to be welded includes two product tubes, several heat sinks, and several spot-welded connectors. The spot-welded connectors are steel bars. Figure 6 Only some of the welded connections are shown in the image.

[0062] All heat sinks in product 2 to be welded are welded to the spot welding connectors. That is, the heat sinks are integrated with the two product tubes and the spot welding connectors by spot welding.

[0063] Lifting lugs are installed on the product tube.

[0064] In this example, it includes clamp number 6 and clamp number 7.

[0065] The first welding robot body 1 is mounted on the base 3, and the first fixture 6 has no X-axis displacement. The second welding robot body and the second fixture 7 are both mounted on the base frame 16, and the second fixture 7 can generate X-axis displacement under the drive of the X-axis moving unit.

[0066] "Flexibility" means that the workstation is suitable for products with a length of 2.5m (distance along the X direction) and a width of 1.8m (distance along the Y direction).

[0067] In this embodiment, the workstation is described using fixture number 6 as an example:

[0068] Fixture No. 6 includes:

[0069] The first Y-direction limiting unit 10, the first clamping unit and the first pressing unit are distributed sequentially along the Y direction and are all located on the side of the first clamp bracket 9 facing the product 2 to be welded.

[0070] Both ends of the first Y-axis limiting unit 10 are detachably connected to the first clamp bracket 9; the Y-axis distance between the first clamping unit and the product tube is adjustable.

[0071] One end of the product tube of the product to be welded 2 is abutted against the first Y-direction limiting unit 10 or the first clamp bracket 9 at one end along the Y direction, and the other end along the Y direction is abutted against the first clamping block 11 of the first clamping unit.

[0072] When the width of the product tube (along the Y direction) is less than 1m, the first Y-direction limiting unit 10 is installed on the first clamp bracket 9. At this time, one end of the product tube along the Y direction abuts against the first Y-direction limiting unit 10, and the other end along the Y direction abuts against the first clamping block 11 of the first clamping unit.

[0073] Among them, when the product tube width (along the Y direction) is less than 1m, such as Figure 6 As shown, the clamping unit is positioned close to the axis of the flipping unit 4, which can enhance the service life of the flipping unit 4 and reduce the deformation of the clamp bracket.

[0074] When the width of the product tube (along the Y direction) is greater than 1m, the first Y-direction limiting unit 10 is not used. At this time, one end of the product tube along the Y direction abuts against the connector of the first clamp bracket 9, and the other end along the Y direction abuts against the first clamping block 11 of the first clamping unit.

[0075] When the width of the product tube (along the Y direction) is greater than 1m, adjusting the clamping unit only in the Y direction will cause the center of gravity of the entire product to be welded to move away from the axis of the flipping unit 4. Therefore, it is necessary to remove the first Y direction limiting unit 10.

[0076] Therefore, this workstation is suitable for products with a width of 1.8m or less.

[0077] Furthermore, since fixture 6 and welding robot body 1 have no X-axis displacement, fixture 7 and welding robot body 2 can move in the X-axis. Therefore, this workstation is suitable for products with a length of up to 2.5m.

[0078] like Figures 7-9 The first Y-direction limiting unit 10 includes:

[0079] The first limiting block 101 is connected to the first clamp bracket 9 by fasteners and protrudes toward the product 2 to be welded;

[0080] And the first limiting rod 102 is integrally formed with the first limiting block 101. It extends along the Y direction, and the groove at its end is engaged with the end of the first clamp bracket 9.

[0081] The first clamp bracket 9 includes a first bracket body 90, on which a first connector 91 is provided to cooperate with a first limiting rod 102. The first connector 91 forms the end of the first clamp bracket 9, and is connected to the first bracket body 90 by fasteners. The connector is as follows: Figure 9 As shown.

[0082] The first clamping unit includes a pair of first support blocks 12 distributed along the Y direction, and the first support block 12 has a slot that mates with the product tube.

[0083] The No. 1 clamping unit also includes:

[0084] Support 13 is disposed on clamp bracket 9; in this embodiment, support 13 is snapped onto bracket body 90 and connected by fasteners (bolts and nuts). Figure 3 As shown, since the No. 1 clamp bracket 9 has several mounting holes that mate with the fastener, the Y-direction position of the No. 1 support 13 on the No. 1 clamp bracket 9 is adjustable.

[0085] Adjustment seat 14 is disposed on support 13 and has a hollow structure; in this embodiment, adjustment seat 14 is connected to support 13 by fasteners.

[0086] The No. 1 adjusting screw 15 extends along the Y direction and is threadedly connected to the No. 1 adjusting seat 14. Both ends of the screw pass through the No. 1 adjusting seat 14, and the end facing the product tube is connected to the No. 1 clamping block 11.

[0087] In addition, a Y-axis moving unit 8 is further provided, which is correspondingly provided to the clamp 6 and is located between the clamp and the base 3.

[0088] In addition, a first flipping unit 4 is further provided, which is set in correspondence with the first fixture, and its output end is connected to the first fixture 6.

[0089] In this embodiment, the first flipping unit 4 includes:

[0090] like Figure 15 As shown, a flip motor is connected to an RV reducer. The output end of the RV reducer is connected to a transition plate, which is connected to the first clamp bracket 9 by fasteners.

[0091] A flip motor is fixedly mounted on a support frame, and a Y-axis moving unit 8 is set between the support frame and the base 3.

[0092] like Figure 14 As shown, the X-axis moving unit 5 includes:

[0093] The base is fixed to the base frame 16 by fasteners;

[0094] The gear is connected to the output shaft of the motor, which is mounted on the base.

[0095] The rack and pinion are fixed to the base 3 along the X direction and mesh with the gear.

[0096] The X-axis moving unit 5 is further provided with a lubrication gear (wool felt) for lubricating the rack, which is rotatably mounted on the base and has an external oil passage on its upper end surface. The lubrication gear is a driven component and rotates under the drive of the rack.

[0097] like Figure 11 The Y-axis moving units are configured corresponding to the fixtures, including a first Y-axis moving unit 8 and a second Y-axis moving unit with identical structures. The first Y-axis moving unit 8 is located between the first fixture and the base 3, and the second Y-axis moving unit is located between the second fixture and the base frame 16.

[0098] like Figure 13 As shown, the second Y-axis moving unit has the same structure as the X-axis moving unit 5. It also adopts a gear and rack meshing method, with the rack fixed and the gear rotating and translating.

[0099] In summary, as Figure 5As shown, regarding the structure of the left and right sides of the product 2 to be welded, apart from the design of whether the welding robot body has a degree of freedom along the X direction and the installation position of the Y direction moving unit, the rest of the structure is the same on both sides.

[0100] How this workstation works:

[0101] Step 1: Loading materials.

[0102] Step 1A: Hoist the product 2 to be welded to the center position of the workstation using a truss hoist. Specifically, the truss hoist receives the lifting lugs on the product 2 to be welded.

[0103] Step 1B: The truss with three degrees of freedom (XYZ) moves to clamp the product tube on the left into the groove of the first support block 12 of the first clamp 6.

[0104] Step 1C: Under the drive of the X-axis moving unit 5, the second clamp moves to the left and stops when it reaches the set size (the position where the product is about to be clamped). At this time, the product tube on the right side is supported by the support block of the second clamp 7. Then the truss is removed.

[0105] Step 1D: After adjusting the clamping unit to the appropriate position, manually fine-tune the clamping of the product to be welded 2.

[0106] Fine-tuning steps: Manually tighten the corresponding adjusting screws to press the clamping blocks on clamp 6 and clamp 7.

[0107] Step 1E: The control component X-axis moving unit 5 continues to move to the left until the second clamp 7 presses against the product 2 to be welded. The state formed at this time is as follows. Figure 5 As shown.

[0108] Step 2, welding.

[0109] The two welding robot bodies on the left and right are activated to perform the welding process simultaneously.

[0110] During welding, for postures that the welding robot body cannot twist, the flipping unit 4 is coordinated with the stroke linkage.

[0111] Because the gap between two adjacent heat sinks is small, the upper part cannot be fully welded by the rotation of the robot alone. Therefore, after fully welding one heat sink to the product tube, the Y-axis moving unit moves one distance in the direction of the welding robot body.

[0112] Therefore, after the upper part is welded once, the flipping unit 4 rotates 180° synchronously to continue welding the lower part until the entire welding is completed.

[0113] Step 3: Unload.

[0114] First, suspend the product, then manually loosen the two clamping blocks, and finally, the X-axis moving unit 5 drives the second clamp 7 to completely release the product, lift the product away and return to the loading stage to complete one cycle.

[0115] In summary, this workstation addresses worker safety hazards, improves production efficiency and yield, and ultimately reduces production costs by changing traditional welding methods. The specific implementation objective is:

[0116] 1. In order to eliminate safety hazards for operators, firstly reduce the labor intensity of operators, secondly simplify the operation procedures for operators, and replace operators with machines as much as possible.

[0117] 2. To improve production efficiency and yield, two welding robots are set up at one workstation to work simultaneously (previously one welding worker was working). Due to the use of robotic welding, the yield and consistency have been significantly improved.

[0118] 3. Reducing production costs can be achieved in two ways: one is to improve production efficiency and increase the yield rate; the other is to reduce labor costs by replacing the required skilled welding workers with ordinary operators.

[0119] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A highly flexible dual-robot welding workstation for transformer heat sinks, characterized in that, include: A pair of clamps with identical structures are set opposite each other along the X direction, forming a space between them for placing the product to be welded (2); The clamps mentioned above all include: The Y-direction limiting unit, clamping unit and pressing unit are distributed sequentially along the Y direction and are all located on the side of the fixture bracket facing the product to be welded (2); Both ends of the Y-direction limiting unit are detachably connected to the clamp bracket; the Y-direction distance between the clamping unit and the product tube is adjustable; the product to be welded (2) includes the product tube; The product tube of the product to be welded (2) has one end along the Y direction abutting against the Y direction limiting unit or clamp bracket, and the other end along the Y direction abutting against the clamping block of the clamping unit. One of the fixtures and one of the welding robot bodies are fixed to the base (3) and both are set on the base frame (16). The base frame (16) and the base (3) are connected by an X-axis moving unit (5).

2. The high-flexibility dual-robot welding workstation for transformer heat sinks according to claim 1, characterized in that, The Y-direction limiting unit includes: The limiting block is connected to the fixture bracket by fasteners and protrudes toward the product to be welded (2); The limiting rod is integrally formed with the limiting block and extends along the Y direction. The groove at its end is engaged with the end of the clamp bracket.

3. The high-flexibility dual-robot welding workstation for transformer heat sinks according to claim 2, characterized in that, The clamp bracket includes a bracket body, on which a connector that cooperates with a limiting rod is provided, and the connector forms the end of the clamp bracket.

4. The high-flexibility dual-robot welding workstation for transformer heat sinks according to claim 1, characterized in that, The clamping unit includes a pair of support blocks distributed along the Y direction, and the support blocks have slots that mate with the product tube.

5. The high-flexibility dual-robot welding workstation for transformer heat sinks according to claim 1, characterized in that, The clamping unit further includes: Support, mounted on the clamp bracket; An adjustment seat, disposed on the support, is a hollow structure; An adjusting screw extends along the Y direction and is threadedly connected to the adjusting seat. Both ends of the adjusting screw pass through the adjusting seat, and the end facing the product tube is connected to the clamping block.

6. The high-flexibility dual-robot welding workstation for transformer heat sinks according to claim 1, characterized in that, It further includes a Y-axis moving unit corresponding to the fixture, one of which is located between the corresponding fixture and the base (3), and the other is located between the corresponding fixture and the base frame (16).

7. The high-flexibility dual-robot welding workstation for transformer heat sinks according to claim 1, characterized in that, It further includes a flipping unit (4), which is configured to correspond to the fixture, and its output end is connected to the corresponding fixture.

8. The high-flexibility dual-robot welding workstation for transformer heat sinks according to claim 1, characterized in that, The product to be welded (2) also includes several spot welding connectors, and all heat sinks in the product to be welded (2) are welded to the spot welding connectors.

9. The high-flexibility dual-robot welding workstation for transformer heat sinks according to claim 1, characterized in that, The X-axis moving unit (5) include: Base, set on the underframe; A gear is connected to the output shaft of a motor, which is mounted on a base. And a rack, fixed to the base (3) along the X direction, and meshing with the gear.

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