Automatic welding equipment for washing machine shell

Abstract

The present application relates to the technical field of intelligent equipment, in particular to a kind of automatic welding equipment for washing machine shell, the equipment includes equipment frame, U type shell positioning mechanism and automatic welding mechanism;U type shell positioning mechanism includes positioning workbench and U type shell positioning assembly, automatic welding mechanism includes translation frame and lifting frame, translation frame is provided with vertical plate, second drive assembly and second sliding assembly are provided on vertical plate, second drive assembly is used to drive lifting frame to move up and down, welding tongs support, third drive assembly and cylinder are arranged on the side of lifting frame, with the expansion of cylinder piston rod, two welding tongs supports move towards or move away, welding tongs are arranged on welding tongs support;Two sets of inner support cylinders are arranged on the other side of lifting frame, and inner support plate is arranged on the end of piston rod of inner support cylinder.The present application can realize the automatic assembly and welding operation of washing machine shell, improve production efficiency and guarantee the consistency of assembly quality.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent equipment, and in particular to automatic welding equipment for a washing machine shell. Background Art

[0002] Currently, on domestic washing machine (drum) shell production lines, the front plate and U-shaped shell can only be assembled together manually offline. The reason is that the U-shaped shell is a 0.8mm galvanized sheet metal bent part with poor workpiece rigidity. After the U-shaped shell is placed in the welding station, the vertical plates on both sides will be skewed to varying degrees, resulting in different shapes of the U-shaped opening. Before welding, the shape of the U-shaped shell needs to be manually corrected before the front plate and U-shaped shell can be assembled and welded. This results in low operating efficiency of the welding station (single-person assembly cycle is 50 seconds), large fluctuations in assembly accuracy, and a significant impact on production cycle due to human factors. Therefore, how to design a machine that can meet the requirements of automatic welding of washing machine shells is a technical problem that urgently needs to be solved in this industry. Summary of the Invention

[0003] The object of the present invention is to provide an automatic welding device for a washing machine shell to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: an automatic welding device for a washing machine shell, comprising an equipment frame and a U-shaped shell positioning mechanism and an automatic welding mechanism arranged on the equipment frame;

[0005] The equipment rack is provided with a first driving assembly and a first sliding assembly, wherein the first sliding assembly comprises a first sliding rail and a first sliding block adapted thereto;

[0006] The U-shaped shell positioning mechanism includes a positioning workbench and a U-shaped shell positioning assembly arranged on the positioning workbench, the U-shaped shell positioning assembly includes a positioning cylinder and a positioning block, and the positioning cylinder and the positioning block are respectively arranged on opposite sides of the U-shaped shell;

[0007] The lifting frame is assembled with the second sliding block, and the second sliding block is connected to the lifting frame. The lifting frame is assembled with the second sliding block, and the second sliding block is connected to the lifting frame. A welding clamp support, a third driving assembly and a third sliding assembly are provided on one side of the lifting frame. The welding clamp support has two, and the third driving assembly is a cylinder arranged between the two welding clamp supports. The third sliding assembly includes an adaptive third slide rail and a third slide block. The two welding clamp supports are assembled with the third slide block. As the cylinder piston rod is extended and retracted, the two welding clamp supports move toward or away from each other, and the welding clamp is provided on the welding clamp support; two sets of inner support cylinders are provided on the other side of the lifting frame, and an inner support plate is provided on the piston rod end of the inner support cylinder.

[0008] Furthermore, there are two groups of U-shaped shell positioning assemblies, and each group of U-shaped shell positioning assemblies includes two positioning cylinders and two positioning blocks, and an oblique opening is provided on the inner upper part of the positioning block.

[0009] Furthermore, the U-shaped shell positioning mechanism also includes a workpiece positioning sensor, and the workpiece positioning sensor is located on one side of the U-shaped shell.

[0010] Furthermore, the lifting frame is provided with a baffle located between the two welding clamp supports and hydraulic buffers located on both sides of the two welding clamp supports.

[0011] Furthermore, two support arms are provided on both sides of the lifting frame, and guide plates are provided on the support arms, and the guide plates are located on the outside of the inner support plate. A guide block is also provided on the lifting frame near the inner support cylinder, and the guide block is located below the inner support plate. The guide block is located on the inner side of the guide plate, and the side of the guide block close to the guide plate is an arc-shaped structure, and the end of the guide plate close to the guide block is also an arc-shaped structure, and a flared workpiece entrance is formed between the guide block and the guide plate.

[0012] Furthermore, a front plate guide plate and a front plate pressing cylinder are provided on the support arm, an oblique opening is provided on the inner side of the front plate guide plate, and a pressure block is provided on the end of the piston rod of the front plate pressing cylinder.

[0013] Furthermore, a positioning cylinder is provided on the lifting frame, and a positioning pin is provided at the end of the piston rod of the positioning cylinder. The positioning pin can pass through the positioning holes on the U-shaped shell and the front plate during the up and down movement of the piston rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The automatic welding equipment for washing machine shell disclosed in the present invention can realize the fully automatic positioning and welding of U-shaped shell and front plate, with high efficiency (18S / piece) and high consistency of the products after welding.

[0016] 2. The automatic welding equipment for washing machine shells disclosed in the present invention addresses the disadvantage of the variability of U-shaped shells in the prior art and designs two sets of positioning mechanisms;

[0017] First, considering the rigid shape of the lower part of the U-shaped shell (the lower part of the horizontal plate and the vertical plate), a U-shaped shell positioning mechanism adapted thereto is designed in this application to position the outer side of the lower part of the U-shaped shell;

[0018] Secondly, a design for correcting the posture of the upper part of the U-shaped shell is added to the automatic welding mechanism, which clamps and positions the upper part of the U-shaped shell from both inside and outside before welding.

[0019] This enables all-round positioning of the entire U-shaped shell workpiece, providing stable assembly and welding prerequisites for the installation and welding of the front plate.

[0020] 3. The automatic welding equipment for the washing machine shell disclosed in the present invention adopts the design of positioning cylinders and positioning pins, and designs positioning holes at corresponding positions of the front plate and the U-shaped shell. The positioning pins move upward under the drive of the positioning cylinders, first penetrate the positioning holes of the U-shaped shell, and at the same time provide precise positioning for the positioning of the front plate, thereby realizing the automatic assembly of the U-shaped shell and the front plate, saving labor, time and manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of the automatic welding equipment for the washing machine shell in the welding state according to the embodiment;

[0022] Figure 2 A schematic structural diagram of an equipment rack in an embodiment;

[0023] Figure 3 Schematic diagram of the structure of the U-shaped shell positioning mechanism in the embodiment;

[0024] Figure 4 Schematic diagram of the automatic welding mechanism in the embodiment.

[0025] Description of main component symbols:

[0026] 100-equipment rack, 101-first drive assembly, 102-first slide rail, 103-first slider.

[0027] 200-U-shaped shell positioning mechanism, 201-positioning workbench, 202-positioning cylinder, 203-positioning block, 204-workpiece in-place sensor.

[0028] 300-automatic welding mechanism, 301-translational frame, 302-lifting frame, 303-vertical plate, 304-second driving assembly, 305-second sliding assembly, 306-welding clamp support, 307-third driving assembly, 308-third sliding assembly, 309-welding clamp, 310-inner support cylinder, 311-inner support plate, 312-support arm, 313-guide plate, 314-guide block, 315-front plate guide plate, 316-front plate clamping cylinder, 317-positioning cylinder, 318-positioning pin.

[0029] 401-U-shaped shell, 402-front plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] See also Figure 1 The present invention provides a technical solution: an automatic welding device for a washing machine shell, comprising an equipment frame 100 and a U-shaped shell positioning mechanism 200 and an automatic welding mechanism 300 arranged on the equipment frame 100.

[0032] See also Figure 2 A first driving assembly 101 and a first sliding assembly are provided on the equipment frame 100. The first driving assembly 101 in this embodiment includes a motor, a ball screw and a nut. The output shaft of the motor is coaxially fixedly connected to the ball screw, and the nut is matched with the ball screw for transmission. The first sliding assembly includes a matching first slide rail 102 and a first slider 103.

[0033] See also Figure 3 The U-shaped shell positioning mechanism 200 includes a positioning table 201 and a U-shaped shell positioning assembly mounted on the positioning table 201. The U-shaped shell positioning assembly is divided into two groups, each group comprising two positioning cylinders 202 and two positioning blocks 203. The positioning cylinders 202 and positioning blocks 203 in the same group are positioned on opposite sides of the U-shaped shell 401. The positioning blocks 203 have beveled openings on their inner upper portions. The U-shaped shell positioning mechanism also includes a workpiece positioning sensor 204, located on one side of the U-shaped shell. In this embodiment, the workpiece positioning sensor 204 is a photoelectric sensor manufactured by Leuze.

[0034] See also Figure 4The automatic welding mechanism 300 is two sets symmetrically arranged on both sides of the positioning workbench 201. The automatic welding mechanism 300 includes a translation frame 301 and a lifting frame 302. The translation frame 301 is assembled and connected with the two first sliders 103. The translation frame 301 is also connected to the nut of the first driving assembly 101, so that the translation frame 310 moves horizontally under the drive of the first driving assembly 101. A vertical plate 303 is provided on the translation frame 301, and a second driving assembly 304 and a second sliding assembly 305 are provided on the vertical plate 303. The second sliding assembly 305 includes a corresponding second slide rail and a second slider; the lifting frame 302 is assembled and connected with the second slider. The structure of the second driving assembly 304 is the same as that of the first driving assembly 101, and the lifting frame 302 is driven up and down by a screw transmission.

[0035] The lifting frame 302 is a frame-like structure. A welding clamp support 306, a third drive assembly 307, and a third slide assembly 308 are located on the rear side of the lifting frame 302. There are two welding clamp supports 306, and the third drive assembly 307 is a pneumatic cylinder mounted between the two welding clamp supports. The cylinder body is fixed to one welding clamp support, and the cylinder piston rod is fixed to the other welding clamp support. The third slide assembly 308 includes a corresponding third slide rail and a third slider. There are two second slide rails arranged vertically, each with two third sliders. The two welding clamp supports, one on the left and one on the right, are respectively assembled and connected to two different third sliders on the same third slide rail. When the cylinder piston rod extends, the two welding clamp supports 306 move away from each other along the third slide rail. When the cylinder piston rod retracts, the two welding clamp supports 306 move toward each other along the third slide rail. A welding clamp 309 is mounted on each welding clamp support 306. A baffle is set between the two welding clamp supports 306, and the baffle is located above the cylinder. The position of the baffle is the end point of the welding clamp supports 306 moving toward each other. The hydraulic buffers on both sides of the two welding clamp supports, the inner side of the hydraulic buffers is the end point of the welding clamp supports 306 moving away from each other. At the same time, the hydraulic buffers can prevent the welding clamp supports 306 from rebounding after moving away from each other to the end point, thereby ensuring the accurate welding position of the welding clamp 309.

[0036] Two sets of inner support cylinders 310 are installed on the front side of the lifting frame 302. The two sets of inner support cylinders 310 are arranged symmetrically. Inner support plates 311 are set at the ends of the piston rods of the inner support cylinders 310. When the piston rods of the inner support cylinders 310 extend outward, the inner support plates 311 move outward.

[0037] Two symmetrically arranged arms 312 are provided on either side of the lifting frame 302. Guide plates 313 are positioned on the arms 312, located outside the inner support plate 311. Two guide blocks 314 are also provided on the front side of the lifting frame 302, near the inner support cylinder 310. These blocks are located below the inner support plate 311 and inside the guide plates 313. The sides of the blocks 314 near the guide plates 313 are curved, as are the ends of the guide plates 313 near the blocks 314. A flared workpiece inlet is formed between the blocks 314 and the guide plates 313. The arms 312 also feature a front plate guide plate 315 and a front plate pressing cylinder 316. The front plate guide plate 315 has an oblique notch on its inside, and a pressing block is provided at the end of the piston rod of the front plate pressing cylinder 316.

[0038] A positioning cylinder 317 is located in the middle of the lifting frame, and a positioning pin 318 is located at the end of the piston rod of the positioning cylinder 317. The positioning pin 318 can penetrate holes (not shown) in the U-shaped shell and the front plate as the piston rod moves up and down. It should be noted that the two automatic welding mechanisms 300 can each have two or one positioning pin 318, arranged diagonally.

[0039] The working principle of the washing machine housing in this embodiment is as follows:

[0040] 1. U-shaped shell 401 feeding: A U-shaped shell 401 is placed manually or by a robotic arm onto the worktable 201 of the U-shaped shell positioning mechanism 200. Four positioning blocks 203 provide space for feeding the U-shaped shell 401, and the beveled edges of the positioning blocks 203 guide the feeding of the U-shaped shell 401. A workpiece in-place sensor 204 detects the accurate positioning of the U-shaped shell 401. The piston rod of the positioning cylinder 202 extends to tighten the lower portion of the U-shaped shell.

[0041] 2. Correction of the U-shaped shell 401's posture: Driven by the first drive assembly 101, the translation frame 301 moves horizontally toward the U-shaped shell 401. The vertical plates of the U-shaped shell are enclosed between the guide block 314 and the guide plate 313 to form a flared workpiece entrance. The piston rod of the internal support cylinder 310 extends, squeezing the vertical plates of the U-shaped shell between the internal support block 311 and the guide plate 313. The guide block 314 and the guide plate 313 limit the upper portion of the U-shaped shell, thereby correcting the posture of the U-shaped shell 401. It should be noted that during this process, the piston rod of the third drive assembly 307 is always in a retracted state, and the two welding clamp supports 306 are close to each other. At this time, the space occupied by the welding clamp supports 306 and the welding clamp 309 is minimized, preventing the welding clamp 309 from interfering with the vertical plates of the U-shaped shell 401 during entry into the U-shaped shell 401.

[0042] 3. Feeding the front plate 402: The second drive assembly 304 drives the lifting frame 302 to move upward. During this process, the jaws of the welding clamp are opened, the piston rod of the positioning cylinder 317 is extended, and the positioning pin 318 passes through the positioning hole of the U-shaped shell 401. The front plate 402 is placed into the front plate guide plate 315 manually or by a robotic arm. The inner side of the front plate guide plate 315 is provided with an oblique opening to provide a guide function for the front plate 402. When the front plate 402 falls to the bottom, it is sleeved on the positioning pin 318 by relying on the hole on the front plate 402. At this time, the horizontal position of the front plate 402 is determined, and then the front plate clamping cylinder 316 rotates and presses downward. The pressing block presses downward from the top of the front plate 402, so that the front plate 402 is tightly attached to the U-shaped shell 401.

[0043] 4. Automatic welding of the U-shaped shell 401 and the front plate 402: The piston rod of the third drive assembly 307 extends, the two welding clamp supports 306 move away from each other, the jaws of the welding clamp move to the welding position, and the jaws close to weld the front plate 402 and the U-shaped shell 401.

[0044] After welding is complete, the welding clamp jaws open, the piston rod of the positioning cylinder retracts, the front plate clamping cylinder rotates and extends, the piston rod of the third drive assembly retracts, the welding clamp internal support cylinder retracts, the lifting frame descends, and the translation frame returns to its initial position. This operating principle is similar to the above and is not described here. The welded workpiece is then removed manually or by a robotic arm and moved to the next workstation.

Claims

1. Automatic welding equipment for washing machine shell, characterized by: It includes an equipment frame and a U-shaped shell positioning mechanism and an automatic welding mechanism arranged on the equipment frame; The equipment rack is provided with a first driving assembly and a first sliding assembly, wherein the first sliding assembly comprises a first sliding rail and a first sliding block adapted thereto; The U-shaped shell positioning mechanism includes a positioning workbench and a U-shaped shell positioning assembly arranged on the positioning workbench, the U-shaped shell positioning assembly includes a positioning cylinder and a positioning block, and the positioning cylinder and the positioning block are respectively arranged on opposite sides of the U-shaped shell; The automatic welding mechanism comprises a translation frame and a lifting frame, the translation frame is assembled and connected with the first slide, the first driving assembly is used to drive the translation frame to move in the horizontal direction, the translation frame is provided with a vertical plate, the vertical plate is provided with a second driving assembly and a second sliding assembly, the second sliding assembly comprises an adaptive second slide rail and a second slide block; the lifting frame is assembled and connected with the second slide block, the second driving assembly is used to drive the lifting frame to move up and down, a welding clamp support, a third driving assembly and a third sliding assembly are provided on one side of the lifting frame, the welding clamp support is two, the third driving assembly is a cylinder arranged between the two welding clamp supports, the third sliding assembly comprises an adaptive third slide rail and a third slide block, the two welding clamp supports are assembled and connected with the third slide block, and as the cylinder piston rod is extended and retracted, the two welding clamp supports The clamp supports move toward or away from each other, and a welding clamp is arranged on the welding clamp support; two sets of inner support cylinders are arranged on the other side of the lifting frame, and inner support plates are arranged at the ends of the piston rods of the inner support cylinders; the U-shaped shell positioning assemblies are divided into two groups, and each group of U-shaped shell positioning assemblies includes two positioning cylinders and two positioning blocks, and an oblique opening is arranged on the upper inner side of the positioning block; two support arms are arranged on both sides of the lifting frame, and a guide plate is arranged on the support arm, and the guide plate is located on the outer side of the inner support plate. A guide block is also arranged at a position of the lifting frame close to the inner support cylinder, and the guide block is located below the inner support plate and on the inner side of the guide plate. The side of the guide block close to the guide plate is an arc-shaped structure, and the end of the guide plate close to the guide block is also an arc-shaped structure, and a flared workpiece entrance is formed between the guide block and the guide plate.

2. The automatic welding equipment for washing machine housing according to claim 1, characterized in that: The U-shaped shell positioning mechanism further includes a workpiece in-place sensor, and the workpiece in-place sensor is located on one side of the U-shaped shell.

3. The automatic welding equipment for washing machine housing according to claim 1, characterized in that: The lifting frame is provided with a baffle located between the two welding clamp supports and hydraulic buffers located on both sides of the two welding clamp supports.

4. The automatic welding equipment for washing machine housing according to claim 1, characterized in that: A front plate guide plate and a front plate pressing cylinder are arranged on the support arm, an oblique opening is arranged on the inner side of the front plate guide plate, and a pressing block is arranged on the end of the piston rod of the front plate pressing cylinder.

5. The automatic welding equipment for washing machine housing according to claim 1, characterized in that: A positioning cylinder is provided on the lifting frame, and a positioning pin is provided at the end of the piston rod of the positioning cylinder. The positioning pin can penetrate the positioning holes on the U-shaped shell and the front plate during the up and down movement of the piston rod.

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