Automatic welding equipment for microwave oven liner

Abstract

The present application relates to the technical field of automatic welding, in particular to a microwave oven liner automatic welding equipment. The technical scheme is as follows: including U-shaped plate bending device, motor support welding device, top plate welding device, front plate welding device, waveguide box welding device and outer back plate welding device, the material taking clamp of the material taking robot of the top plate welding device is provided with a U-shaped plate shaping mechanism. The present application has the beneficial effects that: through adopting the robot to grab the components and cooperate with the automatic welding equipment to carry out the automatic welding of each process of the microwave oven liner, the U-shaped plate shaping mechanism and the inner supporting front plate positioning mechanism are used creatively, the problems of the U-shaped plate deformation affecting the welding quality when the U-shaped plate is welded with the top plate and the interference between the robot and the front plate positioning when the outer side of the front plate is positioned are effectively solved, the automation degree of the microwave oven liner welding, the efficiency and the quality of the microwave oven liner welding are improved.

Description

Technical Field

[0001] This invention relates to the field of automated welding technology, and more particularly to an automated welding device for microwave oven liners. Background Technology

[0002] The microwave oven's inner cavity, as its main component, requires the welding and assembly of multiple parts in a specific sequence. To improve the welding quality and efficiency, a six-axis robot is currently used in conjunction with automated welding equipment for the automatic welding of the inner cavity. The welding process involves sequentially welding the U-shaped plate, motor support, top plate, front plate, waveguide box, and rear plate, making it quite complex. The welding of the U-shaped plate to the top plate is particularly challenging, as the U-shaped plate is prone to deformation in the front-to-back or left-to-right directions, leading to inaccurate welding. When welding the cavity to the front plate, the front plate is positioned and fixed using external clamping, a method that struggles to guarantee welding precision and can interfere with the material handling robot, hindering automated welding and requiring significant manual intervention. This ultimately impacts the automation level, efficiency, and quality of the microwave oven inner cavity welding process. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic welding device for microwave oven liners, specifically an automatic welding device for microwave oven liners that is highly automated and effectively ensures welding efficiency and welding quality.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an automatic welding device for microwave oven liner, comprising a U-shaped plate bending device, a motor support welding device, a top plate welding device, a front plate welding device, a waveguide box welding device, and an outer rear plate welding device. The U-shaped plate bending device is used to bend the U-shaped plate; the motor support welding device is used to weld the motor support onto the U-shaped plate; the top plate welding device is used to weld the U-shaped plate and the top plate to form the oven cavity; the front plate welding device is used to weld the oven cavity to the front plate; the waveguide box welding device is used to weld the waveguide box to one side of the oven cavity; and the outer rear plate welding device is used to weld the rear plate to the rear end of the oven cavity. The material handling robot of the top plate welding device is equipped with a U-shaped plate shaping mechanism in its material handling fixture.

[0005] Specifically, the U-shaped plate shaping mechanism includes a fixed base plate, a longitudinal drive mechanism, a bidirectional transverse drive mechanism, and shaping limit blocks. The fixed base plate is fixedly mounted on the material handling fixture. The longitudinal drive mechanism is fixed on the fixed base plate and driven by the bidirectional transverse drive mechanism. There are two shaping limit blocks, which are respectively located on both sides of the bidirectional transverse drive mechanism and driven by the bidirectional transverse drive mechanism.

[0006] Specifically, the shaping limiting block consists of a longitudinal limiting block and a transverse limiting block that is perpendicularly connected to the longitudinal limiting block.

[0007] Specifically, the front panel welding device includes a first front panel welding device and a second front panel welding device. The first front panel welding device is provided with a front panel positioning mechanism. The front panel positioning mechanism includes at least two sets of internal support drive mechanisms and an internal support positioning block that is driven and connected to the internal support drive mechanisms.

[0008] Specifically, the front panel positioning mechanism includes four sets of internal support drive mechanisms and internal support positioning blocks, which correspond to the four corners of the front panel opening.

[0009] Specifically, the internal support positioning block includes a front plate positioning part and a furnace cavity positioning part, with the furnace cavity positioning part located above the front plate positioning part.

[0010] Specifically, the first front plate welding device is used to weld the furnace cavity to the short side of the front plate, and the second front plate welding device is used to weld the furnace cavity to the long side of the front plate.

[0011] Specifically, the U-shaped plate bending device, motor support welding device, top plate welding device, front plate welding device, waveguide box welding device, and outer rear plate welding device are connected by a conveyor line for product transport.

[0012] Specifically, the welding devices for motor support components, top plate, front plate, waveguide box, and outer rear plate all include a material handling robot and welding equipment. The material handling robot is used to clamp and move the workpiece, and the welding equipment is used to automatically weld the workpiece.

[0013] The beneficial effects of this invention are as follows: by using a robot to grasp components and cooperating with an automatic welding equipment to automatically weld each process of the microwave oven inner liner, and by creatively using a U-shaped plate shaping mechanism and an internally supporting front plate positioning mechanism, the invention effectively solves the problems of U-shaped plate deformation affecting welding quality during welding of the microwave oven inner liner and interference with the robot during positioning of the outer side of the front plate, thus affecting the degree of automation of welding. This improves the degree of automation, efficiency and quality of microwave oven inner liner welding. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of the overall structure of an automatic welding device for microwave oven liner in one embodiment; Appendix Figure 2 This is a schematic diagram of the specific structure of the material handling robot of the top plate welding device in the embodiment; Appendix Figure 3 This is a schematic diagram of the specific structure of the U-shaped plate shaping mechanism in the embodiment; Appendix Figure 4 This is a schematic diagram of the front plate positioning mechanism of the front plate welding device in the embodiment, and the positioning connection structure between the front plate and the furnace cavity. Appendix Figure 5 This is a schematic diagram of the front panel positioning mechanism in the embodiment.

[0015] Explanation of reference numerals in the attached drawings: 10-U-shaped plate, 20-top plate, 30-furnace cavity, 40-front plate, 1-U-shaped plate bending device, 2-motor support welding device, 3-top plate welding device, 4-front plate welding device, 41-first front plate welding device, 42-second front plate welding device, 5-waveguide box welding device, 6-outer rear plate welding device, 7-U-shaped plate shaping mechanism, 71-fixed bottom plate, 72-longitudinal drive mechanism, 73-bidirectional transverse drive mechanism, 74-shaping limit block, 741-longitudinal limit block, 742-transverse limit block, 8-conveyor line, 9-front plate positioning mechanism, 91-inner support drive mechanism, 92-inner support positioning block, 921-front plate positioning part, 922-furnace cavity positioning part. Detailed Implementation

[0016] Example 1, referring to Figure 1-5 An automatic welding device for microwave oven liner includes a U-shaped plate bending device 1, a motor support welding device 2, a top plate welding device 3, a front plate welding device 4, a waveguide box welding device 5, and an outer rear plate welding device 6. The U-shaped plate bending device 1 is used to bend the U-shaped plate 10. The motor support welding device 2 is used to weld the motor support to the U-shaped plate 10. The top plate welding device 3 is used to weld the U-shaped plate 10 to the top plate 20 to form the oven cavity 30. The front plate welding device 4 is used to weld the oven cavity 30 to the front plate 40. The waveguide box welding device 5 is used to weld the waveguide box to one side of the oven cavity 30. The outer rear plate welding device 6 is used to weld the rear plate to the rear end of the oven cavity 30. The material handling fixture of the material handling robot of the top plate welding device 3 is equipped with a U-shaped plate shaping mechanism 7.

[0017] In this embodiment, the motor support welding device 2, top plate welding device 3, front plate welding device 4, waveguide box welding device 5, and outer rear plate welding device 6 all include a material handling robot and welding equipment. The material handling robot is used to clamp and move the workpiece, and the welding equipment is used to automatically weld the workpiece. The U-shaped plate bending device 1, motor support welding device 2, top plate welding device 3, front plate welding device 4, waveguide box welding device 5, and outer rear plate welding device 6 are connected by a conveyor line 8 for product transport. In this embodiment, the U-shaped plate bending device 1, motor support welding device 2, waveguide box welding device 4, and outer rear plate welding device 6 can all adopt conventional automatic bending devices and automatic welding devices; that is, conventional material handling robots and bending equipment or welding equipment can be selected according to requirements. The top plate welding device 3 welds the U-shaped plate 10 to the top plate 20 to form the furnace cavity 30. If a conventional robot is used to clamp the U-shaped plate 10 during the welding process with the top plate 20, the U-shaped plate 10 is prone to deformation, which can lead to inaccurate welding. Therefore, in this embodiment, the material handling fixture of the material handling robot of the top plate welding device 3 is equipped with a U-shaped plate shaping mechanism 7, which is used to shape and fix the U-shaped plate 10 when clamping it to avoid deformation during the welding process.

[0018] Specifically, the U-shaped plate shaping mechanism 7 includes a fixed base plate 71, a longitudinal drive mechanism 72, a bidirectional transverse drive mechanism 73, and shaping limiting blocks 74. The fixed base plate 71 is fixedly mounted on the material handling fixture. The longitudinal drive mechanism 72 is fixed to the fixed base plate 71 and driven by the bidirectional transverse drive mechanism 73. The shaping limiting blocks 74 consist of two blocks, respectively located on both sides of the bidirectional transverse drive mechanism 73 and driven by the bidirectional transverse drive mechanism 73. The shaping limiting blocks 74 are composed of a longitudinal limiting block 741 and a transverse limiting block 742 perpendicularly connected to the longitudinal limiting block 741. The longitudinal drive mechanism 72 drives the shaping limiting blocks 74 to move back and forth through the bidirectional transverse drive mechanism 73, cooperating with the fixed base plate 71 to shape and position the U-shaped plate 10 in the front and back directions. The bidirectional transverse drive mechanism 73 can be composed of two sets of linear drive mechanisms facing both sides respectively, realizing bidirectional transverse drive. It shapes and positions the U-shaped plate 10 in the left and right directions by driving the shaping limiting blocks 74 on both sides.

[0019] In addition, in this embodiment, the front plate welding device 4 welds the furnace cavity 30 to the front plate 40. The welding of the front plate 40 includes welding the short side and the long side. During the initial welding, the front plate 40 needs to be fixed first, and then the furnace cavity 30 is placed on the front plate 40 for welding. The conventional fixing device uses an external clamping structure to clamp and fix the front plate 40. However, since the furnace cavity 30 needs to be clamped by a robot and placed on the front plate 40 for welding, if a conventional external clamping is used, it is easy to cause collision with the robot or the furnace cavity 30, affecting the automatic welding. Therefore, in this embodiment, the front plate welding device 4 includes a first front plate welding device 41 and a second front plate welding device 42. The first front plate welding device 41 is used to weld the short side of the furnace cavity 30 to the front plate 40, and the second front plate welding device 42 is used to weld the long side of the furnace cavity 30 to the front plate 30. Alternatively, the first front plate welding device 41 can be used to weld the long side, and the second front plate welding device 42 can be used to weld the short side. In this process, the first front plate welding device 41 performs the welding first. After welding by the first front plate welding device 41, the second front plate welding device 42 does not need to reposition and fix the front plate 40 during welding. Therefore, only the first front plate welding device 41 is equipped with a front plate positioning mechanism 9. The front plate positioning mechanism 9 includes at least two sets of internal support drive mechanisms 91 and internal support positioning blocks 92 that are driven and connected to the internal support drive mechanisms 91. Specifically, the front plate positioning mechanism 9 includes four sets of internal support drive mechanisms 91 and internal support positioning blocks 92, which correspond to the four corners of the front plate opening, respectively. The four sets of internal support drive mechanisms 91 and internal support positioning blocks 92 are used to position and fix the four corners of the front plate 40 opening, thereby achieving effective positioning of the front plate 40 and preventing interference or collision with the robot or furnace cavity 30 during the welding process. In addition, the aforementioned inner support positioning block 92 includes a front plate positioning part 921 and a furnace cavity positioning part 922. The furnace cavity positioning part 922 is located above the front plate positioning part 921. In addition to the front plate positioning part 921 positioning and fixing the front plate 40, the inner support positioning block 92 can also simultaneously position and fix the furnace cavity 30, further improving welding accuracy. Specifically, after the front plate 40 is placed on the front plate positioning mechanism 9, the four sets of inner support drive mechanisms 91 first drive the inner support positioning block 92 to expand outward to position the front plate 40. Then, the inner support drive mechanism 91 drives the inner support positioning block 92 to retract inward. After the robot places the furnace cavity 30 above the front plate, the inner support drive mechanism 91 drives the inner support positioning block 92 to expand outward to simultaneously position and fix the front plate 40 and the furnace cavity 30, thereby effectively improving the alignment accuracy between the front plate 40 and the furnace cavity 30 and improving welding quality.

[0020] Of course, the above are only preferred embodiments of the present invention and are not intended to limit the scope of application of the present invention. Therefore, any equivalent changes made to the principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic welding device for microwave oven inner liner, characterized in that: The system includes a U-shaped plate bending device, a motor support welding device, a top plate welding device, a front plate welding device, a waveguide box welding device, and an outer rear plate welding device. The U-shaped plate bending device is used to bend the U-shaped plate. The motor support welding device is used to weld the motor support to the U-shaped plate. The top plate welding device is used to weld the U-shaped plate and the top plate to form the furnace cavity. The front plate welding device is used to weld the furnace cavity to the front plate. The waveguide box welding device is used to weld the waveguide box to one side of the furnace cavity. The outer rear plate welding device is used to weld the rear plate to the rear end of the furnace cavity. The material handling robot of the plate welding device is equipped with a U-shaped plate shaping mechanism in its material handling fixture. The U-shaped plate shaping mechanism includes a fixed base plate, a longitudinal drive mechanism, a bidirectional transverse drive mechanism, and shaping limit blocks. The fixed base plate is fixedly mounted on the material handling fixture. The longitudinal drive mechanism is fixed on the fixed base plate and driven by the bidirectional transverse drive mechanism. The shaping limit blocks are two blocks, which are respectively located on both sides of the bidirectional transverse drive mechanism and driven by the bidirectional transverse drive mechanism. The shaping limit blocks consist of a longitudinal limit block and a transverse limit block that is perpendicularly connected to the longitudinal limit block.

2. The automatic welding equipment for microwave oven inner liner according to claim 1, characterized in that: The front plate welding device includes a first front plate welding device and a second front plate welding device. The first front plate welding device is provided with a front plate positioning mechanism. The front plate positioning mechanism includes at least two sets of internal support drive mechanisms and an internal support positioning block that is driven and connected to the internal support drive mechanisms.

3. The automatic welding equipment for microwave oven inner liner according to claim 2, characterized in that: The front panel positioning mechanism includes four sets of internal support drive mechanisms and internal support positioning blocks, which correspond to the four corners of the front panel opening.

4. The automatic welding equipment for microwave oven inner liner according to claim 3, characterized in that: The inner support positioning block includes a front plate positioning part and a furnace cavity positioning part, with the furnace cavity positioning part located above the front plate positioning part.

5. The automatic welding equipment for microwave oven inner liner according to claim 2, characterized in that: The first front plate welding device is used to weld the furnace cavity to the short side of the front plate, and the second front plate welding device is used to weld the furnace cavity to the long side of the front plate.

6. The automatic welding equipment for microwave oven inner liner according to claim 1, characterized in that: The U-shaped plate bending device, motor support welding device, top plate welding device, front plate welding device, waveguide box welding device, and outer rear plate welding device are connected by a conveyor line for product transport.

7. The automatic welding equipment for microwave oven inner liner according to claim 1, characterized in that: The motor support welding device, top plate welding device, front plate welding device, waveguide box welding device, and outer rear plate welding device all include a material handling robot and welding equipment. The material handling robot is used to clamp and move the workpiece, and the welding equipment is used to automatically weld the workpiece.

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