Welding station for continuous production of swivel chair tray accessories

Abstract

The utility model discloses a welding station for continuous production of swivel chair tray accessories, which comprises a welding room and a rotary work station arranged in the welding room, and the welding room is closed; by taking the position of a rotating shaft of the rotary work station as the circle center, the rotary work station is divided into three equal parts at equal angles and corresponds to one station, and the three equal parts sequentially comprise a feeding station, a welding station and a discharging station in the rotating direction; every two adjacent equal parts are separated by a separator. Each equal part corresponds to one station, and a feeding station, a welding station and a discharging station are sequentially arranged in the rotating direction; every two adjacent equal parts are separated by a separator. The isolation object is a shading screen which is made of rigid materials and is air-tight. The shading screen extends in the radial direction of the rotary work station, the inner side end is close to a rotary shaft of the rotary work station, and the outer side end is located on the outer edge of the rotary work station. And a discharging robot is mounted at the discharging station. The scheme has the beneficial effects that not only can the production efficiency be improved, but also the harm of smoke dust to the body of an employee can be further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automatic welding equipment, and specifically relates to a welding station for continuous production of swivel chair tray accessories. BACKGROUND

[0002] The manufacturing of swivel chair trays needs to go through multiple welding procedures.

[0003] Traditional technology adopts manual welding. Manual welding has many shortcomings. First, the manual welding operation mode requires high skills of the operator, and the operator must have a certificate and rich working experience, which increases the difficulty of personnel management and recruitment. Second, manual operation means manual clamping and manual welding, which inevitably causes inconsistent welding leg height, poor welding quality stability, and unattractive welding appearance. No matter from the performance or appearance of the product, the quality stability is not good, and the product qualification rate is not high. Third, the arc light generated during welding damages the eyes of the operator, and the smoke generated during welding also harms the respiratory tract of the staff.

[0004] Due to the above problems, the prior art has made corresponding improvements, and a welding robot has been introduced to form a semi-automatic welding operation mode. Specifically, manual clamping and unloading of products are realized outside the welding house by a single-axis two-station positioner, automatic welding inside the welding house by a robot, a light shield is arranged between the operator and the robot, and smoke exhaust measures are arranged on the top of the welding house. In this way, the operator does not need a welding certificate, and the skill requirement is reduced. Only the ability to clamp and unload products is required. Since the welding is completely completed by the robot, the welding quality and stability are guaranteed. The setting of the light shield also solves the problem of arc light influence. For example, Chinese patent document CN110681993A disclosed on January 14, 2020, "an intelligent flexible laser welding station", including a main unit and a service unit, the service unit is located behind the main unit, the main unit includes a turntable, a welding robot, a main bottom plate and a welding house providing protection, the bottom of the welding house is connected with the main bottom plate, the turntable and the welding robot are arranged in the welding house, the turntable is provided with a welding station, the welding robot performs welding operation on the welding station, the service unit is provided with a module control cabinet, the module control cabinet establishes data communication with the welding robot and controls the welding operation of the welding robot. The present application is highly intelligent and flexible, adopts a welding station specially suitable for power batteries and motors, can be separated and assembled through the main unit and the service unit, the front end of the welding house is convenient for feeding and discharging, the multi-station turntable can realize low-beat welding work, and is convenient to maintain.

[0005] However, in actual application, the product after welding still continues to smoke, and the smoke in the welding room is not completely purified so quickly, and the light screen inevitably brings out the smoke to the outside of the welding room when rotating, which still causes harm to the respiratory tract of the loading and unloading personnel. When the artificial unloads the product, the product temperature is still high, and burns are easy to occur. In terms of efficiency, since such equipment is double-station, one worker matches one robot, and the matching is not ideal, whether the worker waits for the robot or the robot waits for the worker, so that the whole production efficiency is low. SUMMARY

[0006] Based on the above problems, the utility model provides a welding station for continuous production of swivel chair tray accessory, which divides loading and unloading into two independent stations, can improve production efficiency, and can further reduce the harm of smoke to employees.

[0007] In order to achieve the purpose of the application, the application adopts the following technical scheme: a welding station for continuous production of swivel chair tray accessory, comprising a welding room and a rotary workstation arranged in the welding room,

[0008] The welding room is closed;

[0009] Taking the position of the rotating shaft of the rotary workstation as the center, the rotary workstation is equally divided into three equal parts at equal angles, each equal part corresponds to a station, and the stations are sequentially arranged in the rotation direction: a loading station, a welding station and a unloading station; the adjacent two equal parts are isolated by a partition.

[0010] As a preferred, the partition is a light screen made of rigid material and not permeable to air.

[0011] As a preferred, the light screen extends along the radial direction of the rotary workstation, the inner side end is close to the position of the rotating shaft of the rotary workstation, and the outer side end is located at the outer edge of the rotary workstation.

[0012] As a preferred, a unloading robot is installed at the unloading station.

[0013] As a preferred, the welding room is provided with a smoke purification treatment device.

[0014] As a preferred, the smoke purification treatment device comprises a high-flow air extractor for sucking air in the welding room outward.

[0015] As a preferred, the welding room is provided with a loading station opening, and both sides of the loading station opening are connected with a loading station lateral baffle; when the rotary workstation is rotated to the position, the inner side ends of the two loading station lateral baffles are close to the outer side end of one light screen, respectively.

[0016] As a preferred, a control mechanism for controlling the rotation of the rotary workstation is further provided, and each operation of the control mechanism can only make the rotary workstation rotate one station in sequence.

[0017] As preferred, the welding room is provided with an openable and closable passage for the finished product storage frame.

[0018] The beneficial effects of the scheme are: not only can improve production efficiency, but also can further reduce the physical harm of smoke to employees. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the utility model;

[0020] Figure 2 is Figure 1 a top view.

[0021] Wherein: 1: welding room; 2: rotary workstation; 3: light shield; 4: welding robot; 5: tooling fixture; 6: blanking robot; 7: material taking clamp jaw; 8: display screen; 9: control mechanism; 10: smoke purification treatment device; 11: finished product storage frame; 12 blanking station lateral baffle. DETAILED DESCRIPTION

[0022] The present application will be further described in conjunction with the drawings and specific embodiments.

[0023] Example 1

[0024] Example 1 is a welding station for continuous production of swivel chair tray accessories, which is applied in the production workshop of a professional swivel chair tray production enterprise. As shown in Figure 1 、 Figure 2 , the welding station for continuous production of swivel chair tray accessories of the example includes a welding room 1, which is closed. The welding room 1 is provided with a rotary workstation 2. The rotary workstation 2 of the example includes a circular turntable, which is placed horizontally and provided with a rotating shaft to make it rotatable. With the position of the rotating shaft as the center, three light shields 3 are fixed in a radial manner to divide the turntable into three equal parts, corresponding to three stations, which are sequentially arranged in the direction of rotation according to the normal operation process, i.e. blanking station, welding station and blanking station. The light shield 3 is located between the adjacent two stations. The light shield 3 is a thin steel plate, and the light on one side of the light shield 3 cannot irradiate to the other side, and air cannot flow to the other side at will. The lower edge of the light shield 3 is fixed on the disc surface, and the height of the upper edge is about 200 CM, which is slightly higher than the height of an average person. The height of the ceiling of the welding room 1 is 220 CM from the ground, so there is a gap of 20 CM between the upper edge of the light shield 3 and the ceiling of the welding room 1.

[0025] The welding room 1 is provided with a blanking station opening, which is located Figure 2Below, the area is designed so that operators can perform loading operations. On either side of the loading station opening, a side baffle 12 is connected to the base of the loading station. The ends of the side baffles 12 are close to the rotary workstation 2. When the rotary workstation 2 is in the working position, the end of each side baffle 12 is close to the outer end of a light shield 3. The side baffles 12 and the light shield 3 work together to create a continuous smoke and harmful light blocking effect. The side baffles 12 extend from the ground to a height level with the ceiling of the welding room 1. Therefore, as shown... Figure 2 As shown, it can be understood that the enclosed welding room 1 is recessed inward at the material loading station, so that the entire material loading station is exposed outside the welding room 1.

[0026] Rotary workstation 2 has tooling fixtures 5 fixed at the same position on three equally divided sections of the turntable for clamping materials. The welding station has a welding robot 4, and the unloading station has an unloading robot 6. The unloading robot 6 is equipped with corresponding material-grabbing claws 7 according to different materials.

[0027] by Figure 2 Taking the direction as an example, in this case, the loading station is located at the bottom, the welding station is located at the upper right, and the unloading station is located at the upper left. During operation, the rotary workstation 2 is kept stationary. The worker loads materials at the loading station. After loading is completed, the rotary workstation 2 starts, and the turntable rotates counterclockwise one station to deliver the loaded material to the welding station. Then, the rotary workstation 2 stops, and the welding robot 4 performs automated welding at the welding station. Simultaneously, the worker performs a new loading operation at the loading station. After loading is completed, the rotary workstation 2 is started again, and the turntable rotates counterclockwise one station to deliver the welded material to the unloading station. At the same time, the newly loaded material is also delivered to the welding station. Then, the rotary workstation stops again, the loading station continues loading, the welding station continues welding, and the unloading robot 6 performs automated unloading at the unloading station. After completion, the rotary workstation 2 drives the turntable to rotate one station, so that loading, welding, and unloading are completed in independent stations.

[0028] The advantage of the welding station used for continuous production of swivel chair tray accessories in this example is:

[0029] The operations are independent and do not interfere with each other, which will not lead to poor workstation matching and improves work efficiency.

[0030] The unloading and loading processes are separated, eliminating the need for manual unloading of hot materials; the tooling fixtures also have an extra cooling period at the unloading station, and have been effectively cooled before being transferred to the loading station.

[0031] The large-scale isolation measures formed by the lateral baffle 12 of the feeding station and the light shield 3 cooperate to effectively isolate the harmful light pollution and smoke pollution outside the feeding station with manual work, which is beneficial to protect the health of employees.

[0032] The above is the basic embodiment of the present scheme.

[0033] Example 2

[0034] This embodiment is optimized on the basis of example 1.

[0035] In the present embodiment, the welding house 1 is equipped with a smoke purification treatment device 10 for treating harmful smoke generated at the welding station. The smoke purification treatment device 10 can be of the type described in Chinese patent document CN109048055A: a laser welding smoke treatment device, comprising a device main body, a replacement device arranged in the device main body, a dust removal device arranged in the device main body, and a suction device arranged in the device main body, the replacement device comprising a motor fixedly arranged in the device main body, the upper end of the motor being powerfully connected with a first rotating shaft, a first cavity being arranged in the upper inner wall of the motor, the upper end of the first rotating shaft extending into the first cavity and being rotatably connected to the upper inner wall of the first cavity through a bearing, and a first rotating block being fixedly connected to the first rotating shaft in the first cavity; the present device can automatically absorb and treat the smoke generated during laser welding, recycle metal powder from the smoke, and combine harmful substances for treatment, which is environmentally friendly and safe, and the adsorption block can also be automatically replaced to save manpower.The application has simple structure and convenient operation. The exhaust pipe is taken out from the pipe fixing block, the exhaust port is aligned with the laser welding position, the exhaust pump is started, and the smoke dust enters the exhaust port and then enters the exhaust pipe. At this time, the magnetic plate is magnetized, the smoke dust enters the ninth cavity, the metal part is adsorbed by the magnetic plate, the remaining smoke dust absorbs harmful particles through the harmful particle absorption device, the smoke dust enters the third cavity, then enters the fourth cavity, then passes through the filter cloth to filter small particle dust, and then passes through the odor adsorption block to adsorb odor. Finally, the treated air is discharged from the third cavity. When the device works for a certain period of time, the collected and adsorbed particles need to be recycled or treated. At this time, the motor is started to drive the first rotating shaft to rotate, thereby driving the first cavity to rotate by a certain angle, thereby driving the fourth rotating block to rotate by a certain angle, thereby driving the second sliding block to move downward, thereby driving the fourth sliding block to move forward and disengage from the first groove. At the same time, the rotation of the first cavity drives the second rotating block to rotate, thereby driving the third rotating block to rotate, thereby driving the odor adsorption block to rotate. At the same time, the first rotating shaft drives the first bevel gear to rotate, thereby driving the second bevel gear to rotate, thereby driving the third rotating shaft to rotate, thereby driving the third bevel gear to rotate, thereby driving the fourth bevel gear to rotate, thereby driving the rotating shaft to drive the belt to drive the fifth rotating shaft to rotate, thereby driving the magnetic plate to rotate to the vertical position, and the magnetic force of the magnetic plate is disconnected. The metal powder on the magnetic plate enters the left seventh sliding block. At the same time, the rotation of the first rotating shaft drives the first belt to rotate, thereby driving the second rotating shaft to rotate, thereby driving the fifth rotating block to rotate, thereby driving the fifth sliding block to move upward, thereby driving the second spring to accumulate potential energy, thereby driving the third sliding block to move upward when the fourth sliding block is disengaged from the first groove, thereby driving the waste odor adsorption block to move upward. At this time, the rotation of the fifth rotating block drives the fifth sliding block to move downward, the second limiting reset device drives the third sliding block to move downward, and at the same time, the first rotating shaft drives the second belt to rotate, thereby driving the fourth rotating shaft to rotate, thereby driving the cam to rotate, thereby driving the sixth sliding block to move left and right, thereby driving the filter cloth to move left and right to drive the dust to fall into the right seventh sliding block. The seventh sliding block is taken out to recycle the dust. The device can automatically absorb and treat the smoke dust generated during laser welding, recycle the metal powder in the smoke dust, and treat the harmful substances. The device is environmentally friendly and safe, and the adsorption block can be automatically replaced to save labor.

[0036] Through the treatment of the smoke dust purification treatment device 10, the harm of welding smoke dust to employees and the pollution of the environment air can be greatly reduced.

[0037] The remainder is the same as in Example 1.

[0038] Example 3

[0039] In this embodiment, the welding room 1 is equipped with a high-flow air extractor, and the laser welding fume treatment device mentioned in Embodiment 2 is installed outside the welding room 1, and the high-flow air extractor sends the fume into the laser welding fume treatment device through an air duct. This has two benefits: first, by running the high-flow air extractor, a negative pressure is formed in the welding room 1, and from the design of the welding room 1, air can only enter from the gap of 20 cm between the upper edge of the light shield 3 and the ceiling of the welding room 1, so it can ensure that the laser welding fume does not escape from the welding room 1 through various gaps; second, the laser welding fume treatment device is large in size and heavy in weight, and has loud noise and strong vibration when running, so moving it to a remote place can reduce the adverse effects on the workers on site. The air inlet of the high-flow air extractor is close to the welding station, where the amount of fume is the largest, so the air extraction negative pressure is also the largest. When the rotary workstation 2 rotates, the residual fume brought to the unloading station is only a small amount, and is dispersed upward when the rotary workstation 2 stops and the next round of work begins, and is sucked away by the high-flow air extractor; the fume brought out from the unloading station by the rotary workstation 2 rotating again will be extremely limited, thereby protecting the health of the operators at the loading station.

[0040] The rest is the same as Embodiment 2.

[0041] Embodiment 4

[0042] In this embodiment, the rotary workstation 2 is provided with a control mechanism 9. The rotary workstation 2 is provided with a control program and can automatically flow, but the control mechanism 9 is needed to input the signal of manual loading completion to trigger the rotation. When the worker at the loading station finishes loading, the control mechanism 9 is operated, at which time the rotary workstation 2 detects that the welding and unloading of the previous round are completed, and then starts to rotate one station and automatically stops, at which time the next round of work begins: the worker starts to load, the welding robot 4 starts to weld, and the unloading robot 6 starts to unload. In the same work period, only when the loading, welding, and unloading are all completed, the control mechanism 9 can drive the rotation of the rotary workstation 2.

[0043] The control mechanism 9 can be various forms known to those skilled in the art, such as a foot pedal.

[0044] The rest is the same as Embodiment 3.

[0045] Embodiment 5

[0046] In this embodiment, the control mechanism 9 is defined as a button and is installed on the surface of the rotary table away from the tool clamp 5. Considering that the loading in this example is manual loading, the button can only be pressed after the loading is completely finished, so the safety is more guaranteed. Being away from the tool clamp 5 reduces the influence of temperature, welding slag, etc. during welding.

[0047] The rest is the same as Embodiment 4.

[0048] Embodiment 6

[0049] In this embodiment, a finished product storage frame 11 is specially arranged in the welding room 1 beside the unloading robot 6. The finished product is unloaded by the unloading robot 6 to the finished product storage frame 11. The welding room 1 is correspondingly provided with an unloading passage for the finished product storage frame 11 to enter and exit, such as the outlet shown at the lower left. Figure 2 The unloading passage is designed with an automatic opening and closing door to reduce the pollution of the internal air during unloading.

[0050] The rest is the same as Embodiment 5.

[0051] Embodiment 7

[0052] In this embodiment, according to actual needs, 18 materials are loaded on each tooling fixture 5, and three welding robots 4 are arranged at the welding station. As shown in the figure, a display screen 8 is also installed on the lateral baffle 12 at the right side of the loading station to display the working condition of the internal welding station in real time. As shown in the figure, the outlet at the lower right is a personnel access passage. If there is an abnormal situation, maintenance personnel can enter and exit the welding room 1 from this passage. Figure 1 Figure 2

[0053] With the same amount of work, in the traditional scheme without using this embodiment, the time for manual loading and clamping two processes is 11 seconds; the time for manually taking down the finished product is 4 seconds per piece on average; and the total time for loading and unloading 18 materials is 11*18+4*18=270 seconds. The time for welding the first process is about 12 seconds per piece, and the time for welding the second process is about 23 seconds per piece, and the total time for welding 18 materials is 12*18+23*18=630 seconds. It can be seen that the welding time in the traditional method is much longer than the manual loading time.

[0054] In this embodiment, three welding robots are used to weld the product at the same time, and the welding time for two processes is about 12 seconds per piece. The calculation method is (12+23) / 3. Considering the possible interference of the robot action, 12 seconds is used here.

[0055] The time for manual loading and clamping two processes is 11 seconds, which is basically consistent with the welding cycle.

[0056] The unloading operation is completed by the unloading robot 6, which is slightly faster than manual unloading.

[0057] In this way, the bottleneck problem in the traditional scheme: the mismatch between welding time and loading time is perfectly solved. One welding station with a loading staff can achieve about 3 times the work efficiency of the traditional scheme.

[0058] ​​In the long run, the feeding operation can also be automated, and the efficiency can be further improved. Workers only need to monitor remotely, further reducing labor intensity and protecting the health of employees.

Claims

1. A welding station for continuous production of swivel chair tray accessories, comprising a welding house (1) and a rotary work station (2) arranged in the welding house (1), characterized in that, the welding house (1) is closed; the rotary work station (2) is equally divided into three parts at equal angles with the rotary work station (2) as the center, each part corresponding to a work station, and the work stations are sequentially arranged in the rotation direction as follows: a feeding work station, a welding work station, and a discharging work station; the adjacent two parts are separated by a partition.

2. A welding station for the continuous production of swivel chair tray assembly according to claim 1, characterized in that The partition is a light shield (3) made of rigid material and is air-tight.

3. The welding station for continuous production of swivel chair tray accessories according to claim 2, characterized in that it provides light shielding. The light shield (3) extends along the radial direction of the rotary work station (2), with the inner end close to the rotary shaft of the rotary work station (2) and the outer end located at the outer edge of the rotary work station (2).

4. A welding station for the continuous production of swivel chair tray fittings according to claim 1 or 2 or 3, characterized in that A discharging robot (6) is arranged at the discharging work station.

5. A welding station for the continuous production of a swivel chair tray assembly according to claim 1 or 2 or 3, characterized in that The welding house (1) is provided with a smoke purification device (10).

6. A welding station for the continuous production of swivel chair tray assembly according to claim 5, characterized in that The smoke purification device (10) comprises a high-flow air extractor for sucking air in the welding house (1) outwards.

7. The welding station for continuous production of swivel chair tray assembly according to claim 3, characterized in that, The welding house (1) is provided with a feeding work station opening, and both sides of the feeding work station opening are connected with feeding work station side baffles (12); when the rotary work station (2) is positioned, the inner ends of the two feeding work station side baffles (12) are close to the outer ends of a light shield (3) respectively.

8. A welding station for the continuous production of a swivel chair tray assembly according to claim 1 or 2 or 3, characterized in that A control mechanism (9) for controlling the rotation of the rotary work station (2) is arranged at each work station, and each time the control mechanism (9) is operated, the rotary work station (2) can only be rotated by one work station in sequence.

9. A welding station for the continuous production of a swivel chair tray assembly according to claim 1 or 2 or 3, characterized in that The welding house (1) is also provided with a finished product storage frame (11), and a passable and closable channel is arranged for the finished product storage frame (11).

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