A square tube and gasket automatic welding machine

Abstract

The present invention discloses an automatic welding machine for square tubes and gaskets, comprising an operating table, a rotating worktable fixedly mounted on the operating table, and an automatic gasket feeding device, a square tube feeding device, a welding device and an automatic unloading device arranged in sequence around the rotating worktable; a welding assembly mechanism is provided on the rotating worktable; the rotating worktable drives the welding assembly mechanism to circulate between the gasket automatic feeding device, the square tube automatic feeding device, the welding device and the automatic unloading device; the welding assembly mechanism receives the gasket at the gasket automatic feeding device, receives the square tube at the square tube automatic feeding device, and completes the assembly of the gasket and the square tube before moving to the welding device. The present invention can realize automatic feeding, automatic assembly and welding of square tubes and gaskets, and then transmit the welded parts to the unloading area. The whole process does not require manual operation, reduces manpower input, and at the same time improves welding accuracy and production safety, and occupies a small area, which greatly reduces production costs.

Description

Technical Field

[0001] The invention relates to the technical field of welding machines, and in particular to an automatic welding machine for square tubes and gaskets. Background Art

[0002] In industrial production, welding machines are commonly used production equipment. In the past, welding was often done manually. With the needs of production and the improvement of industrial automation levels, automatic welding mechanisms have gradually emerged. However, for the processing between small parts and pipes, such as the welding of square pipes and gaskets, due to the long size of pipes, the traditional assembly line automatic welding process occupies too much space. The conventional processing method is to manually assist the gasket with the square pipe, and then transfer it to the welding table for welding in a semi-automatic mode. This method still relies on manual operation, has a low degree of automation and low welding accuracy. In addition, due to the particularity of the square pipe structure, compared with the round pipe, it does not have rolling properties, so it can only rely on manual lifting of the square pipes in the square pipe stack one by one onto the conveyor, and then the conveyor transports the square pipes to the next process for processing; not only is it time-consuming and labor-intensive, but there is also a risk of work-related injuries. Summary of the invention

[0003] The purpose of the present invention is to propose an automatic square tube and gasket welding machine to address the shortcomings of the prior art. The machine can realize automatic loading of square tubes and gaskets, and can automatically assemble square tubes and gaskets for welding, and then transfer the welded parts to the unloading area. The whole process does not require manual operation, reducing manpower input, while improving welding accuracy and production safety, and it occupies a small area, greatly reducing production costs.

[0004] The technical solution to achieve the purpose of the present invention is:

[0005] A square tube and gasket automatic welding machine comprises an operating table, a rotating worktable rotatably mounted on the operating table, and an automatic gasket feeding device, an automatic square tube feeding device, a welding device and an automatic unloading device arranged in sequence around the rotating worktable; a welding assembly mechanism is provided on the rotating worktable; the rotating worktable drives the welding assembly mechanism to circulate among the automatic gasket feeding device, the automatic square tube feeding device, the welding device and the automatic unloading device; the welding assembly mechanism receives the gasket at the automatic gasket feeding device and receives the square tube at the automatic square tube feeding device, and completes the assembly of the gasket and the square tube before moving to the welding device.

[0006] Furthermore, it also includes a gasket detection device and a square tube detection device; the gasket automatic feeding device, gasket detection device, square tube automatic feeding device, square tube detection device, welding device and automatic unloading device are arranged in sequence and equidistantly around the rotating workbench.

[0007] Furthermore, the rotating workbench includes a first driving mechanism fixedly installed on the bottom of the operating table and a transmission mechanism connected to the first driving mechanism; a turntable is fixedly installed on the transmission mechanism; six welding assembly mechanisms are provided, and the six welding assembly mechanisms are evenly distributed along the circumference of the turntable and arranged along the radial direction of the turntable; a track device is provided under the turntable, and the track device cooperates with the welding assembly mechanism to realize the assembly of the gasket and the square tube.

[0008] Furthermore, the square tube automatic feeding device includes a square tube conveying device, a square tube feeding mechanism, a hopper and a square tube feeding robot; the square tube conveying device is fixedly installed on the operating table, the square tube feeding mechanism is fixedly installed on one side of the operating table at an angle, the hopper is fixedly installed on one side of the operating table, and is used to place square tube stacks, and is connected to the square tube conveying device through the square tube feeding mechanism; the square tube feeding robot is fixedly installed on the operating table and is suitable for moving the square tubes on the square tube conveying device to the welding assembly mechanism.

[0009] Furthermore, the gasket automatic feeding device includes a third frame, a vibration plate, a gasket conveying device and a gasket moving device; the third frame is fixedly mounted on one side of the operating table, the vibration plate is fixedly mounted on the upper end of the third frame, the gasket conveying device is fixedly mounted on the operating table and connected to the vibration plate, and the gasket moving device is fixedly mounted on the operating table and is suitable for transferring the gaskets on the gasket conveying device to the welding assembly mechanism.

[0010] Furthermore, the automatic unloading device includes a fourth frame fixedly installed on one side of the operating table, a welding part unloading robot and a welding part conveying device fixedly installed on the fourth frame; the welding part unloading robot is suitable for transferring the welded square tube and gasket assembly on the welding assembly mechanism to the welding part conveying device.

[0011] Furthermore, the square tube feeding robot includes a fourth driving mechanism fixedly mounted on the operating table, a support frame is adjustably mounted on the output end of the fourth driving mechanism, and a clamping mechanism is rotatably mounted on the other end of the support frame.

[0012] Furthermore, a proximity switch is fixedly installed on the square tube feeding robot.

[0013] Furthermore, it also includes a control panel fixedly installed on the operating table, and the control panel is suitable for controlling the operation of the rotary workbench, the automatic gasket feeding device, the automatic square tube feeding device, the welding device and the automatic unloading device.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects:

[0015] (1) The present invention realizes automatic loading of square tubes and gaskets and automatic unloading of welded parts by providing a rotating worktable and an automatic square tube loading device, a gasket automatic loading device, a welding device and an automatic unloading device arranged around the rotating worktable. Automatic assembly and welding of square tubes and gaskets are realized by providing a welding assembly mechanism on the rotating worktable. The whole process does not require manual operation, thus reducing manpower input, while improving welding accuracy and production safety. In addition, the present invention occupies a small area, thus greatly reducing production costs.

[0016] (2) The present invention provides a gasket detection device and a square tube detection device, thereby ensuring that the square tube automatic feeding device and the gasket automatic feeding device place the square tube and the gasket on the welding assembly mechanism.

[0017] (3) The rotary welding device of the present invention realizes automatic assembly of the gasket and the square tube by setting a turntable and six welding assembly mechanisms respectively arranged on the upper part of the turntable and a track device at the lower part. The two cooperate with each other to avoid manual operation. Since the rotary welding mode of the turntable structure is adopted, the occupied area is further reduced, saving production space and cost.

[0018] (4) The automatic square tube feeding device of the present invention connects the square tube conveying device and the hopper for placing the square tube stack through an inclined feeding device, thereby realizing automatic feeding of the square tubes. By arranging a square tube feeding robot, the square tubes on the square tube conveying device can be automatically transferred to the welding assembly mechanism, thereby overcoming the disadvantage that the square tubes do not have a rolling type, avoiding manual handling and possible injuries to personnel, and improving operational safety.

[0019] (5) The gasket automatic feeding device of the present invention enables the gaskets to automatically fall into the gasket conveying device through the vibration plate, thereby realizing automatic feeding of the gaskets. By setting up the gasket moving device, the gaskets on the gasket conveying device can be automatically transferred to the rotary welding device.

[0020] (6) The automatic unloading device of the present invention realizes the transfer of the welded parts after the square tube and the gasket are welded to the welded parts conveying device by setting up the welded parts conveying device and the welded parts unloading manipulator, thereby realizing the automatic unloading of the welded parts.

[0021] (7) The mobile device of the present invention meets the transfer requirements of parts of different sizes by providing a support frame that is adjustably mounted on the second driving mechanism, and is more convenient to use.

[0022] (8) The mobile device of the present invention is also provided with a proximity switch, which sends out an induction signal when the support frame rotates, thereby ensuring that the rotary welding device, the square tube automatic loading device and the automatic unloading device can cooperate stably.

[0023] (9) The present invention is also provided with a control panel to facilitate the control of the operation of the rotary workbench, the automatic gasket feeding device, the automatic square tube feeding device, the welding device and the automatic unloading device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the rotating device of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the welding assembly mechanism of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the track device of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the automatic feeding device for square tubes of the present invention;

[0030] Figure 6 for Figure 5 A partial enlarged view of the middle part;

[0031] Figure 7 for Figure 5 A partial enlarged view of point B in the middle;

[0032] Figure 8 for Figure 5 A partial enlarged view of point C in the middle;

[0033] Fig. 9 for Figure 5 A partial enlarged view of point D in the middle;

[0034] Fig.10 This is a schematic structural diagram of a second tube turning assembly of the present invention;

[0035] Fig.11 for Figure 1 A partial enlarged view of point E in the middle;

[0036] Fig.12 It is a schematic structural diagram of the square tube moving device of the present invention.

[0037] The reference numerals in the accompanying drawings are:

[0038] Operation table 1;

[0039] Rotating workbench 2, welding assembly mechanism 2-1, bottom plate 2-1-1, fixed seat 2-1-2, guide rail 2-1-3, sliding block 2-1-4, fixed column 2-1-5, first roller 2-1-6, base 2-1-7, guide pin 2-1-8, sliding column 2-1-9, boss 2-1-10, second roller 2-1-11, first driving mechanism 2-2, transmission mechanism 2-3, gear 2-3-1, gear ring 2-3-2, turntable 2-4, first arcuate through groove 2-4-1, second arcuate through groove 2-4-2, track device 2-5, cam structure 2-5-1, first track 2-5-2, second track 2-5-3, third track 2-5-4, fourth track 2-5-5, fifth track 2-5-6, sixth track 2-5-7;

[0040] Welding device 3;

[0041] Square tube automatic feeding device 4, square tube feeding mechanism 4-1, first support seat 4-1-1, first rotating shaft 4-1-2, first sprocket 4-1-3, first conveying chain 4-1-4, second driving mechanism 4-1-5, connecting column 4-1-6, hopper 4-2, first frame 4-2-1, first side plate 4-2-2, second side plate 4-2-3, third side plate 4-2-4, fourth transmission member 4-3, second support seat 4-3-1, second rotating shaft 4-3-2, second sprocket 4-3-3, second conveying chain 4-3-4, support part 4-3-5, third driving mechanism 4-4, first tube turning mechanism 4-5, the third support seat 4-5-1, the first limiting column 4-5-2, the second tube turning mechanism 4-6, the first limiting plate 4-6-1, the first lifting mechanism 4-6-2, the horizontal turning mechanism 4-6-3, the fourth support seat 4-6-4, the third rotating shaft 4-6-5, the second turning part 4-6-6, the square tube discharging mechanism 4-7, the second limiting plate 4-7-1, the second lifting mechanism 4-7-2, the second limiting column 4-7-3, the clamping part 4-7-4, the square tube feeding manipulator 4-8, the fourth driving mechanism 4-8-1, the support frame 4-8-2, the locking plate 4-8-3, the clamping mechanism 4-8-4;

[0042] Gasket automatic feeding device 5, third frame 5-1, vibration plate 5-2, gasket conveying device 5-3, gasket conveying trough 5-3-1, tablet pressing column 5-3-2, gasket pushing part 5-3-3, gasket moving device 5-4;

[0043] Automatic unloading device 6, fourth frame 6-1, welding piece conveying device 6-2, baffle 6-3, welding piece unloading manipulator 6-4;

[0044] Control Panel7. DETAILED DESCRIPTION

[0045] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0046] (Example 1)

[0047] See Figures 1 to 12 The square tube and gasket automatic welding machine of this embodiment comprises an operating table 1, and a rotating worktable 2 rotatably mounted on the operating table 1, and an automatic gasket feeding device 5, a gasket detection device, an automatic square tube feeding device 4, a square tube detection device, a welding device 3 and an automatic unloading device 6 are arranged in sequence around the rotating worktable 2, and a control panel 7 is also fixedly mounted on the operating table 1. The welding device 3 adopts a laser welding machine. The control panel 7 adopts a touch screen and is electrically connected to the rotating worktable 2, the automatic square tube feeding device 4, the automatic gasket feeding device 5 and the automatic unloading device 6, and is used to control the start and stop of each device, and the operation is convenient.

[0048] See Figures 1 to 4 The rotating workbench 2 includes a welding assembly mechanism 2-1, a first driving mechanism 2-2, a transmission mechanism 2-3, a turntable 2-4, and a track device 2-5. The first driving mechanism 2-2 adopts a reduction motor and is fixedly installed at the bottom of the operating table 1. The transmission mechanism 2-3 includes a gear 2-3-1 and a ring gear 2-3-2 that mesh with each other, wherein the gear 2-3-1 is fixedly installed on the output shaft of the reduction motor, and the transmission mechanism 2-3 adopts a gear transmission mode, and the transmission is more stable. The turntable 2-4 is coaxially fixedly installed on the upper surface of the ring gear 2-3-2, and six radially arranged welding assembly mechanisms 2-1 are evenly installed on the upper surface of the turntable 2-4 along the circumferential direction. A first arc-shaped through groove 2-4-1 and a second arc-shaped through groove 2-4-2 are arranged in sequence from the inside to the outside in the fan-shaped area between adjacent welding assembly mechanisms 2-1 on the turntable 2-4, which reduces the weight of the turntable 2-4, reduces the load of the first driving mechanism 2-2, improves energy efficiency and prolongs the service life of the first driving mechanism 2-2.

[0049] The welding assembly mechanism 2-1 includes a bottom plate 2-1-1, a pipe clamping assembly and a fixed seat 2-1-2. The pipe clamping assembly includes a pipe lifting assembly and a pipe translation assembly. The bottom plate 2-1-1 is fixedly mounted on the upper surface of the turntable 2-4. The pipe clamping assembly is symmetrically arranged at both ends of the bottom plate 2-1-1 and penetrates the bottom plate 2-1-1 and the turntable 2-4. The fixed seat 2-1-2 is fixedly mounted at one end of the bottom plate 2-1-1 away from the center of the turntable 2-4. A positioning cone is arranged on the top of the fixed seat 2-1-2. The positioning cone cooperates with the circular hole in the center of the gasket to ensure that the gasket is not easy to fall off during the rotation of the turntable 2-4.

[0050] The pipe lifting assembly includes a guide rail 2-1-3 fixedly mounted on the bottom plate 2-1-1 and a sliding block 2-1-4 moving up and down along the guide rail 2-1-3. A fixed column 2-1-5 is installed at the bottom of the sliding block 2-1-4. A first roller 2-1-6 rotating in the vertical direction is provided at the bottom of the fixed column 2-1-5.

[0051] The pipe translation assembly includes a base 2-1-7 fixedly mounted on the bottom plate 2-1-1 and a guide pin 2-1-8 fixedly mounted on the upper part of the base 2-1-7, on which a sliding column 2-1-9 is provided; a boss 2-1-10 extending upward is provided on the top of the sliding column 2-1-9, and a second roller 2-1-11 rotating in the horizontal direction is provided at the bottom of the sliding column 2-1-9.

[0052] The track device 2-5 is fixedly installed below the turntable 2-4, and includes a double-layer cam structure 2-5-1, a first track assembly, a second track assembly, and a third track assembly. The first track assembly includes an arc-shaped first track 2-5-2 and a second track 2-5-3 fixedly installed on the operating table 1; the second track assembly includes an arc-shaped third track 2-5-4 and a fourth track 2-5-5 fixedly installed on the operating table 1; the third track assembly includes an arc-shaped fifth track 2-5-6 and a sixth track 2-5-7 fixedly installed on the operating table 1 and arranged outside the second track assembly. One end of the upper end surface of the first track 2-5-2, the second track 2-5-3, the third track 2-5-4, and the fourth track 2-5-5 is a slope surface, and the other end is a plane. The double-layer cam structure 2-5-1 is fixedly installed on the operating table 1 and is eccentrically arranged with the center of the turntable 2-4, and the turntable 2-4 is rotatably installed on the cam structure 2-5-1.

[0053] Three proximity switches fixedly mounted on the operating table 1 are provided on the periphery of the turntable 2-4, two of which are used to detect whether the square tube and the gasket are placed in place during the entire process of rotary welding, namely the square tube detection device and the gasket detection device, and the other one cooperates with the bolt fixedly mounted on the edge of the turntable 2-4. Every time the turntable rotates one circle, the bolt approaches the proximity switch, sends a signal, and records the completion of a complete welding process.

[0054] The square tube automatic feeding device 4 includes a square tube conveying device fixedly mounted on the operating platform 1, and a tilted square tube feeding mechanism 4-1 and a hopper 4-2 for placing square tube stacks are fixedly mounted on the front side of the operating platform 1, and the hopper 4-2 is connected to the square tube conveying device through the square tube feeding mechanism 4-1.

[0055] The square tube feeding mechanism 4-1 includes a first transmission member, a second transmission member and a third transmission member which are rotatably mounted on the operating platform 1 in parallel. The first transmission member, the second transmission member and the third transmission member have the same structure, including a first support seat 4-1-1 fixedly mounted on the operating platform 1 and a first rotating shaft 4-1-2 which is rotatably mounted on the first support seat 4-1-1 through a bearing, and first sprocket wheels 4-1-3 are fixedly mounted on both ends of the first rotating shaft 4-1-2. The first conveying chain 4-1-4 is wound around the first sprocket wheels 4-1-3 of the first transmission member, the second transmission member and the third transmission member. A second driving mechanism 4-1-5 which is transmission-connected to the first transmission member is fixedly mounted at the bottom of the operating platform 1, and the second driving mechanism 4-1-5 adopts a reduction motor. The two first conveying chains 4-1-4 are symmetrically and evenly fixed with connecting columns 4-1-6 which are suitable for driving the square tube feeding in the hopper 4-2.

[0056] The hopper 4-2 is funnel-shaped, including a first frame 4-2-1 and a first side plate 4-2-2 and a second side plate 4-2-3 that are tilted and fixed on the first frame 4-2-1, so that the square tubes stacked in the hopper 4-2 can automatically slide onto the square tube feeding mechanism 4-1, avoiding manual operation. Both ends of the first side plate 4-2-2 are provided with a third side plate 4-2-4 connected to both ends of the second side plate 4-2-3. The distance between the two third side plates 4-2-4 is slightly greater than the length of the square tube, and together with the first side plate 4-2-2 and the second side plate 4-2-3, they form a accommodating space for the square tube, ensuring that the square tubes can be neatly arranged in the hopper 4-2.

[0057] The square tube conveying device includes two fourth transmission members 4-3 which are rotatably mounted on the operating table 1 in parallel, one fourth transmission member 4-3 is arranged between the first transmission member and the second transmission member, the other fourth transmission member 4-3 is arranged at the end of the square tube conveying device, and the end of the conveying device is fixedly provided with a third driving mechanism 4-4 which is transmission-connected with the other fourth transmission member 4-3, and the third driving mechanism 4-4 also adopts a reduction motor. The fourth transmission member 4-3 includes a second support seat 4-3-1 which is fixedly mounted on the operating table 1, and a second rotating shaft 4-3-2 which is rotatably mounted on the second support seat 4-3-1 through a bearing, and second sprocket wheels 4-3-3 are fixedly mounted on both ends of the second rotating shaft 4-3-2, and two second conveying chains 4-3-4 are wound in parallel between the second sprocket wheels 4-3-3 on the two fourth transmission members 4-3. A supporting part 4-3-5 for supporting the upper chain of each second conveying chain 4-3-4 is fixedly mounted on the operating table 1 to prevent the upper chain from becoming loose during the square tube conveying process and affecting the normal use of the equipment.

[0058] The square tube conveying device also includes a first tube turning mechanism 4-5, a second tube turning mechanism 4-6 and a square tube discharging mechanism 4-7 which are fixedly mounted on the operating table 1 and arranged in sequence along the conveying direction. For square tubes with different front and back structures, their front and back directions can be effectively controlled to facilitate subsequent processing needs. The first tube turning mechanism 4-5 and the second tube turning mechanism 4-6 are both provided with proximity switches fixedly mounted on the operating table 1 to monitor whether the square tube is normally transmitted.

[0059] The first tube turning mechanism 4-5 includes a third support seat 4-5-1 fixedly and symmetrically mounted on the outside of the second conveying chain 4-3-4 and a first limit column 4-5-2 fixedly mounted on the upper inner side of the third support seat 4-5-1. When the square tube passes through the first tube turning mechanism 4-5, if the wide side of the square tube contacts the second conveying chain 4-3-4, it will continue to be transported forward. If the narrow side of the square tube contacts the second conveying chain 4-3-4, it will be turned backward 90° under the obstruction of the first limit column 4-5-2, realizing the first turning, ensuring that the wide side of the square tube contacts the second conveying chain 4-3-4.

[0060] The second tube turning mechanism 4-6 includes a first tube turning assembly and a second tube turning assembly. The first tube turning assembly includes a first limit plate 4-6-1 and a first turning part fixedly mounted on the operating table 1 and symmetrically arranged on the outside of the second conveying chain 4-3-4. The first turning part includes a first lifting mechanism 4-6-2 fixedly mounted on the operating table 1 and a horizontal turning mechanism 4-6-3. The first lifting mechanism 4-6-2 adopts a double-axis cylinder fixedly mounted on the operating table 1, and the horizontal turning mechanism 4-6-3 includes a slide cylinder fixedly mounted on the operating table 1 and a stepper motor fixedly mounted on the top of the slide cylinder. A turning block matching the inner hole of the square tube is fixedly mounted on the output shaft of the stepper motor. A sensor for detecting the positive and negative directions of the square tube is fixedly mounted on the inner side of the first limit plate 4-6-1. The second tube turning assembly includes a fourth support seat 4-6-4 symmetrically fixedly mounted on the operating table 1 and arranged inside the two second conveying chains 4-3-4, and a third rotating shaft 4-6-5 rotatably mounted on the upper part of the fourth support seat 4-6-4. The two ends of the third rotating shaft 4-6-5 are respectively provided with a second turning part 4-6-6, and the second turning part 4-6-6 is "windmill-shaped". The second tube turning assembly drives the belt transmission through a stepping motor, thereby driving the third rotating shaft 4-6-5 to rotate.

[0061] The square tube discharging mechanism 4-7 includes a lifting device and a clamping device fixedly mounted on the operating platform 1. The lifting device includes two second limit plates 4-7-1 fixedly mounted on the operating platform 1, and a second lifting mechanism 4-7-2 is fixedly mounted on the second limit plates 4-7-1. The second lifting mechanism 4-7-2 adopts a double-axis cylinder, and a proximity switch is also installed on the upper part of one of the second limit plates 4-7-2. The clamping device includes a second limit column 4-7-3 and a clamping part 4-7-4 symmetrically fixedly arranged on the outside of the second conveying chain 4-3-4, and the clamping part 4-7-4 adopts a stainless steel mini cylinder.

[0062] The square tube automatic feeding device 4 also includes a square tube feeding robot 4-8 fixedly mounted on the operating table 1. The square tube feeding robot 4-8 includes a fourth driving mechanism 4-8-1, a support frame 4-8-2, a locking plate 4-8-3 and a clamping mechanism 4-8-4. The fourth driving mechanism 4-8-1 is fixedly mounted on the operating table 1, one end of the support frame 4-8-2 is provided with a rectangular through slot, and the other end is rotatably mounted with a clamping mechanism 4-8-4, the output end of the fourth driving mechanism 4-8-1 is sequentially penetrated through the rectangular through slot and the locking plate 4-8-3 of the support frame 4-8-2, and the locking plate 4-8-3 is fixedly connected to the output end of the fourth driving mechanism 4-8-1 and the support frame 4-8-2 by bolts and screws, thereby realizing an adjustable connection between the support frame 4-8-2 and the output end of the fourth driving mechanism 4-8-1. The square tube feeding manipulator 4-8 also includes a belt transmission device installed at both ends of the support frame 4-8-2. A tensioning wheel is provided in the middle of the support frame 4-8-2 to facilitate the adjustment of the tension of the belt and improve the stability of the square tube feeding manipulator 4-8 structure. The clamping mechanism 4-8-4 adopts an air claw structure to facilitate clamping the square tube. A sensor is fixedly installed on the square tube feeding manipulator 4-8. The sensor is a proximity switch. When the support frame 7-4 rotates, an induction signal is sent to ensure that the rotating worktable 2 and the square tube automatic feeding device 4 can cooperate stably.

[0063] The gasket automatic feeding device 5 includes a third frame 5-1 fixedly mounted on the front side of the operating table 1, and a vibration disk 5-2 is fixedly mounted on the third frame 5-1. A gasket conveying device 5-3 connected to the vibration disk 5-2 is fixedly mounted on the operating table 1. The gasket conveying device 5-3 includes a gasket conveying trough 5-3-1 fixedly mounted on the operating table 1, and a sheet pressing column 5-3-2 is fixedly mounted on the side of the gasket conveying trough 5-3-1 to prevent the gaskets in the gasket conveying trough 5-3-1 from falling. One end of the gasket conveying trough 5-3-1 is connected to the vibration disk 5-2, and the other end is connected to a gasket pushing part 5-3-3, including a gasket pushing trough connected to the gasket conveying trough 5-3-1 and a stainless steel mini cylinder fixed at one end of the gasket pushing trough, and the piston rod of the stainless steel mini cylinder is fixedly mounted with a push piece matching the gasket to push the gasket in the push trough to the corresponding position of the moving device. The gasket automatic feeding device 5 also includes a gasket moving device 5-4 fixedly mounted on the operating table 1. The structure of the gasket moving device 5-4 is similar to the square tube feeding robot 4-8. The difference is that since the gasket size is very small, in order to facilitate clamping, the clamping mechanism of the gasket moving device 5-4 adopts a pneumatic suction nozzle structure.

[0064] The automatic unloading device 6 includes a fourth frame 6-1 fixedly mounted on one side of the operating table 1 and a welding piece conveying device 6-2 fixedly mounted on the fourth frame 6-1. The welding piece conveying device 6-2 adopts a chain transmission method, and a baffle 6-3 is provided at the end of the conveying direction. When a certain number of welding pieces are accumulated, they are transferred. The automatic unloading device also includes a welding piece unloading manipulator 6-4, which has the same structure as the square tube loading manipulator 4-8, and is convenient for clamping welding pieces.

[0065] The working principle of this embodiment:

[0066] The square tube automatic feeding device 4 performs automatic feeding of square tubes. First, the square tubes in the hopper 4-2 slide down to the first conveying chain 4-1-4 of the square tube feeding mechanism 4-1 in sequence under the action of gravity, and rise to the square tube conveying device along the first conveying chain 4-1-4 under the action of the connecting column 4-1-6. When the square tube reaches the first tube turning mechanism 4-5, it will turn backward 90° under the obstruction of the first limit column 4-5-2, realize the first turning and continue to be transmitted to the second tube turning mechanism 4-6, passing through the first tube turning assembly and the second tube turning assembly in sequence. Due to the different structures of the front and back sides of the square tube, circular holes of different sizes are respectively provided, and the sensor detects the front and back directions of the square tube according to the size of the circular hole. If the direction is positive, that is, the large hole is at the bottom, it is directly transferred to the second tube-turning assembly; if the direction is negative, that is, the small hole is at the bottom, the first lifting mechanism 4-6-2 of the first tube-turning assembly lifts the square tube upward, so that the center of the square tube is aligned with the center of the flip block of the horizontal flip mechanism 4-6-3, and the slide cylinder of the horizontal flip mechanism 4-6-3 slides to the right, and with the cooperation of the first limit plate 4-6-1, the flip block is inserted into the square tube, and under the action of the stepper motor, the square tube flips 180° in the positive direction, and then is transferred to the second tube-turning assembly, and under the action of the second flip part 4-6-6, the square tube flips forward 90° to realize the change of the special processing direction of the square tube, and continues to be transferred forward. The square tube reaches the second limit plate 4-7-1 at the square tube discharging mechanism 4-7, and the second lifting mechanism 4-7-2 lifts the square tube upward from the second conveyor chain 4-3-4. When the center of the square tube is aligned with the center of the clamping device, the proximity switch sends a signal, and the piston rod of the clamping part 4-7-4 moves to the left, and the square tube is clamped and fixed under the joint action of the second limit column 4-7-3. The air claw of the square tube feeding manipulator 4-8 clamps the square tube and moves the square tube to the rotary table 2.

[0067] The gasket automatic feeding device 5 performs automatic feeding of gaskets. The gaskets are poured into the vibrating plate 5-2. Under the action of the vibrating plate 5-2, the gaskets slide into the gasket conveying groove 5-3-1. The gaskets continuously enter the groove and reach the gasket pushing groove. Under the action of the stainless steel mini cylinder, the pusher pushes the gaskets to the bottom of the pneumatic suction nozzle, and is moved to the top of the fixed seat 2-1-2 on the rotating workbench 2 under the action of the suction nozzle.

[0068] The rotating workbench 2 realizes automatic welding of the square tube and the gasket. The proximity switch detects that the gasket has been placed in place, and the turntable 2-4 drives the welding assembly mechanism 2-1 to rotate. At the same time, the second roller 2-1-11 close to one end of the center of the turntable 2-4 rotates along the inner wall of the double-layer cam structure 2-5-1, and the first rollers 2-1-6 at both ends of the bottom plate 2-1-1 roll along the upper surfaces of the first track 2-5-2 and the second track 2-5-3 respectively. At this time, the upper surface is a plane stage.

[0069] The square tube is placed on the sliding block 2-1-4 and the sliding column 2-1-9 of the tube clamping assembly. The two sides of the guide rail 2-1-3 are higher than the sliding block 2-1-4. The second roller 2-1-11 at one end close to the center of the turntable 2-4 continues to rotate along the inner wall of the double-layer cam structure 2-5-1. The first rollers 2-1-6 at both ends of the bottom plate 2-1-1 roll along the upper surfaces of the first track 2-5-2 and the second track 2-5-3 respectively. At this time, the upper surface is a slope inclined downward. The sliding block 2-1-4 moves downward, and the sliding column 2-1-9 moves to the side away from the center of the turntable 2-4, thereby driving the square tube to descend and translate, and gradually cooperate with the gasket.

[0070] When the square tube and the gasket are fully assembled in place, the first roller 2-1-6 disengages from the first track 2-5-2 and the second track 2-5-3, and the second roller 2-1-11 near one end of the center of the turntable 2-4 continues to rotate along the inner wall of the double-layer cam structure 2-5-1. At this stage, the positions of the square tube and the gasket are relatively static, and the proximity switch detects that the square tube has moved into place, avoiding subsequent empty welding and ensuring the production qualification rate.

[0071] The turntable 2-4 continues to drive the welding assembly mechanism 2-1 to rotate and reach the welding device 3, completing the automatic welding of the square tube and the gasket. The turntable 2-4 continues to rotate, and the first rollers 2-1-6 at both ends of the bottom plate 2-1-1 roll along the upper surfaces of the third track 2-5-4 and the fourth track 2-5-5 respectively. At this time, the upper surface is a slope that is inclined upward and transitions to a plane. The sliding block 2-1-4 moves upward, and the second roller 2-1-11 at one end away from the center of the turntable 2-4 rotates along the inner wall of the fifth track 2-5-6. The sliding column 2-1-9 moves to the side close to the center of the turntable 2-4, thereby driving the welded square tube and gasket assembly to rise and translate, and gradually separate from the fixed seat 2-1-2 where the gasket is placed. The turntable 2-4 continues to rotate, and the second roller 2-1-11 at one end away from the center of the turntable 2-4 transitions from the inner wall of the fifth track 2-5-6 to rotate along the outer wall of the sixth track 2-5-7, thereby resetting the second roller 2-1-11 and preparing for the next welding.

[0072] The welding piece unloading robot 6-4 moves the welded welding piece to the automatic unloading device 6 to complete the automatic welding of the entire fully automatic square tube and the gasket.

[0073] In this embodiment, an automatic square tube loading device 4, an automatic gasket loading device 5, a moving device, a rotating worktable 2 and an automatic unloading device 6 are arranged, and a control panel 7 is used to control the start and shutdown of each device, thereby realizing automatic loading of square tubes and gaskets, automatic welding of square tubes and gaskets, and automatic unloading of welded parts. The whole process does not require manual operation, reducing manpower input, while improving welding accuracy and production safety, and occupies a small area, greatly reducing production costs.

[0074] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic welding machine for square tubes and gaskets, characterized in that: The invention comprises an operating table (1), a rotating worktable (2) rotatably mounted on the operating table (1), and an automatic gasket feeding device (5), an automatic square tube feeding device (4), a welding device (3) and an automatic unloading device (6) arranged in sequence around the rotating worktable (2); a welding assembly mechanism (2-1) is provided on the rotating worktable (2); the rotating worktable (2) drives the welding assembly mechanism (2-1) to circulate among the automatic gasket feeding device (5), the automatic square tube feeding device (4), the welding device (3) and the automatic unloading device (6); the welding assembly mechanism (2-1) receives the gasket at the automatic gasket feeding device (5) and receives the square tube at the automatic square tube feeding device (4), and completes the assembly of the gasket and the square tube before moving to the welding device (3).

2. The square tube and gasket automatic welding machine according to claim 1 is characterized in that: It also includes a gasket detection device and a square tube detection device; the gasket automatic feeding device (5), the gasket detection device, the square tube automatic feeding device (4), the square tube detection device, the welding device (3) and the automatic unloading device (6) are arranged in sequence at equal distances around the rotating worktable (2).

3. The square tube and gasket automatic welding machine according to claim 2 is characterized in that: The rotary workbench (2) further comprises a first driving mechanism (2-2) fixedly mounted on the bottom of the operating table (1) and a transmission mechanism (2-3) connected to the first driving mechanism (2-2); a turntable (2-4) is fixedly mounted on the transmission mechanism (2-3); six welding assembly mechanisms (2-1) are provided, and the six welding assembly mechanisms (2-1) are evenly distributed along the circumference of the turntable (2-4) and are arranged along the radial direction of the turntable (2-4); a track device (2-5) is provided below the turntable (2-4), and the track device (2-5) cooperates with the welding assembly mechanism (2-1) to realize the assembly of the gasket and the square tube.

4. The square tube and gasket automatic welding machine according to claim 2 is characterized in that: The square tube automatic feeding device (4) comprises a square tube conveying device, a square tube feeding mechanism (4-1), a hopper (4-2) and a square tube feeding manipulator (4-8); the square tube conveying device is fixedly mounted on an operating table (1), the square tube feeding mechanism (4-1) is fixedly mounted on one side of the operating table (1) at an angle, the hopper (4-2) is fixedly mounted on one side of the operating table (1) and is used for placing a stack of square tubes and is connected to the square tube conveying device via the square tube feeding mechanism (4-1); the square tube feeding manipulator (4-8) is fixedly mounted on the operating table (1) and is suitable for moving the square tubes on the square tube conveying device to the welding assembly mechanism (2-1).

5. The square tube and gasket automatic welding machine according to claim 2 is characterized in that: The gasket automatic feeding device (5) comprises a third frame (5-1), a vibration plate (5-2), a gasket conveying device (5-3) and a gasket moving device (5-4); the third frame (5-1) is fixedly mounted on one side of an operating table (1), the vibration plate (5-2) is fixedly mounted on the upper end of the third frame (5-1), the gasket conveying device (5-3) is fixedly mounted on the operating table (1) and connected to the vibration plate (5-2), and the gasket moving device (5-4) is fixedly mounted on the operating table (1) and is suitable for transferring the gasket on the gasket conveying device (5-3) to the welding assembly mechanism (2-1).

6. The square tube and gasket automatic welding machine according to claim 2, characterized in that: The automatic unloading device (6) comprises a fourth frame (6-1) fixedly mounted on one side of the operating table (1), a welding piece unloading robot (6-3), and a welding piece conveying device (6-2) fixedly mounted on the fourth frame (6-1); the welding piece unloading robot (6-3) is suitable for transferring the welded square tube and gasket assembly on the welding assembly mechanism (2-1) to the welding piece conveying device (6-2).

7. The square tube and gasket automatic welding machine according to claim 4 is characterized by: The square tube feeding robot (4-8) comprises a fourth driving mechanism (4-8-1) fixedly mounted on an operating table, a support frame (4-8-2) being adjustably mounted on an output end of the fourth driving mechanism (4-8-1), and a clamping mechanism (4-8-4) being rotatably mounted on the other end of the support frame (4-8-2).

8. The square tube and gasket automatic welding machine according to claim 7 is characterized by: A proximity switch is fixedly mounted on the square tube feeding manipulator (4-8).

9. The square tube and gasket automatic welding machine according to claim 1, characterized in that: It also comprises a control panel (7) fixedly mounted on the operating table, wherein the control panel (7) is suitable for controlling the operation of the rotary worktable (2), the automatic gasket feeding device (5), the automatic square tube feeding device (4), the welding device (3) and the automatic unloading device (6).

Images