A method for welding table legs for quick installation of lifting tables

Abstract

The present invention discloses a method for welding table legs for quick installation of a lifting table, which adopts automatic welding equipment for welding, and comprises the following steps: (1) feeding; (2) table leg welding alignment; (3) bottom plate welding alignment; (4) rotation welding; (5) ejecting the material; (6) repeating steps (1) to (5) until the welding operation is completed. The present invention adopts a fully automatic workpiece positioning and welding method to realize the welding process of the assembly line; during the welding process, the table leg and the bottom plate are pre-fed and aligned, and rotation welding is performed after alignment. After the welding is completed, the next table leg and bottom plate enter, and the previously welded table leg is ejected, thereby achieving the purpose of automatic feeding, automatic positioning and alignment, and automatic discharging.

Description

Technical Field

[0001] The invention belongs to the field of manufacturing of lifting tables, and in particular relates to a method for welding table legs for quickly installing lifting tables. Background Art

[0002] A lift table is a type of table that has an adjustable height function. Through height adjustment, it can be suitable for people of different ages and different usage needs. Lift tables include electric lift tables and manual lift tables. Electric lift tables use electricity as a power source, and the height of the lift table is adjusted by controlling the mechanical device through the motor. The height of the lift table can also be adjusted by controlling the air pressure rod or hydraulic rod through the compressor. Manual lift tables use a rotating crank or a crank handle to drive the lift.

[0003] Welding is an essential process in the manufacture and production of lifting tables. The welding process can fix the table leg components and form a stable table leg structure. The existing table leg welding method has a low degree of automation and requires workers to cooperate to complete the welding operation. The welding efficiency is low and it is impossible to achieve assembly line continuous welding operations. In addition, when positioning the welding workpiece, the positioning effect is poor, and the workpiece will tilt or lose position during welding, resulting in poor quality of the welded product. Summary of the invention

[0004] The purpose of the present invention is to provide a method for welding table legs for quickly installing a lifting table. In view of the defects in the prior art, a fully automatic workpiece positioning and welding method is adopted to realize the welding process of the assembly line. During the welding process, the table legs and the base plate are pre-fed and aligned, and then rotation welding is performed after alignment. After the welding is completed, the next table leg and the base plate are entered, and the previously welded table leg is pushed out, thereby achieving the purposes of automatic feeding, automatic positioning and alignment, and automatic discharging.

[0005] In order to solve the above technical problems, the following technical solutions are adopted:

[0006] A method for welding table legs for quick installation of a lifting table, characterized in that: welding is performed using automatic welding equipment, including the following steps:

[0007] (1) Feeding: feeding the table legs into the first feeder of the automatic welding equipment, where they are stacked from top to bottom; feeding the bottom plates into the second feeder of the automatic welding equipment, where they are stacked from top to bottom;

[0008] (2) Table leg welding alignment: The table legs are pushed into the rotary positioner from the first feeder, and the table legs are clamped after being pushed into place;

[0009] (3) Bottom plate welding alignment: The bottom plate is pushed from the second feeder to the rotary positioner. After it is pushed into place, the table legs are aligned with the bottom plate;

[0010] (4) Rotational welding: Use a welding gun to weld the table legs and the base plate. The welding is divided into four stages. Each stage welds the part that the welding gun is aimed at. After each stage of welding is completed, rotate 90° to weld the next stage until the welding is completed;

[0011] (5) Ejecting the material: Repeat step (2), and push the next table leg from the first feeder to the rotary positioner. While pushing it in, the finished product that has been welded in step (4) is ejected, and the finished product falls onto the material table;

[0012] (6) Repeat steps (1) to (5) until the welding operation is completed.

[0013] Furthermore, a first feed trough is provided inside the first feeder, and the table legs are stacked in sequence from bottom to top in the first feed trough; a support assembly is provided outside the first feeder, and the support assembly includes a support bracket, a support cylinder, a cylinder connecting piece, a support push plate and a support plate, the support bracket is installed on the first feeder, and a support cylinder is installed on the support bracket, the support cylinder is connected to the support push plate through the cylinder connecting piece, the support push plate passes through the support bracket through a guide rod and is connected to the support plate, the first feeder is provided with an opening one at the support plate, the support plate extends into the first feed trough through the opening one, or is retracted from the first feed trough to reset; the support assembly is provided with two groups, namely an upper support assembly and a lower support assembly, the support plate of the lower support assembly is used to insert and support the bottom table legs; the support plate of the upper support assembly is used to insert and support the second bottom table legs;

[0014] The unloading process of the first feeder: a. Before unloading, the lower support assembly extends to support all the table legs; b. During unloading, the upper support assembly extends, inserts and supports the second bottom table legs, then the lower support assembly resets, and the bottom table legs fall down; c. For the second unloading, first extend the lower support assembly, then reset the upper support assembly, the table legs move down and are supported by the lower support assembly; then the upper support assembly extends, inserts and supports the second bottom table legs, at this time the lower support assembly resets, and the bottom table legs fall down; d. Repeat the second unloading process and unload the table legs in sequence.

[0015] The first feeder of the present invention arranges the table legs in sequence from bottom to top in a stacked manner, and realizes orderly and sequential unloading through the supporting process of the upper supporting assembly and the lower supporting assembly, thereby achieving the purpose of automatic and continuous unloading and feeding. It has high unloading efficiency and accurate unloading, avoiding the safety problems existing in manual operation and the problems of inaccurate unloading or feeding.

[0016] Further, step (2): before the table legs are pushed into the rotary locator, they are first unloaded onto a pushing table, and then pushed into the rotary locator by the pushing table. The pushing table is installed below the first feeder, and includes a pushing table top and a pushing screw. A pushing track is provided on the pushing table top, and a track groove is provided below the pushing track. The pushing track is docked with the rotary locator, and a pushing screw is installed in the track groove. The pushing screw is connected to a pushing plate, and the pushing plate extends out of the track groove. Through the reciprocating motion of the pushing plate, the table legs are pushed into the rotary locator in sequence.

[0017] The pushing process of the pushing table: after the table leg is unloaded onto the pushing table, the pushing plate is located at the rear end of the table leg. After the pushing screw is started, it drives the table leg forward into the rotary locator. After it is pushed into place, the pushing screw drives the pushing plate to reset. After the next table leg is unloaded, the above process is repeated to push it into the rotary locator.

[0018] The pusher table of the present invention is used to push the table legs into the rotary positioner in sequence and continuously to wait for welding. The pushing power adopts a pusher screw, and the pushing action is smooth and the pushing speed is reasonable, and there will be no problems such as jamming. Based on the continuous pushing action, continuous welding is achieved, which significantly improves the welding work efficiency. After pushing the material, the table leg can accurately enter the welding station of the rotary positioner, achieve accurate positioning, and improve the welding quality.

[0019] Furthermore, the push screw includes a screw support, a screw motor, a screw, a screw nut and a nut seat installed on the screw support, the screw motor is connected to the screw, the screw is connected to the screw nut and the nut seat, and the nut seat is connected to the push plate through the screw connecting rod. The push screw has a simple structure, strong adaptability, and is practical and convenient.

[0020] Furthermore, the rotary positioner includes a turntable wheel and a positioning box, the turntable wheel is connected to the positioning box inwardly through a turntable connecting rod, and a positioning cavity is provided in the positioning box, and the positioning cavity matches the table leg; the positioning box is also provided with a positioning assembly, and the positioning assembly includes a positioning cylinder and a positioning pressure rod connected to the positioning cylinder; after the table leg is pushed into the positioning cavity, the positioning cylinder is started, driving the positioning pressure rod to press down and fix the table leg; the table leg is driven to rotate by the rotary positioner to cooperate with the rotary welding operation of step (4). The rotary positioner has the functions of rotary welding and positioning the table leg: a. The table leg positioning function is realized by the positioning cylinder and the positioning pressure rod. After the table leg is pushed into the welding station of the rotary positioner, the positioning cylinder is started, driving the positioning pressure rod to press down, achieving the purpose of pressing and fixing the material, so that the table leg and the bottom plate are always accurately positioned, and the welding quality is improved; b. The rotary welding function realizes automatic welding. After each welding surface is welded, the unwelded surface is aligned with the welding gun through the rotating action, thereby improving the welding efficiency and quality.

[0021] Furthermore, the turntable wheel includes an outer turntable bracket and an inner turntable, and the turntable is connected to the positioning box inwardly through a turntable connecting rod; the turntable bracket is connected to a turntable motor group, and the turntable motor group is connected to a gear, and a gear ring is installed on the circumference of the turntable, and the gear and the gear ring are meshed with each other to drive the turntable to rotate. The present invention drives the table legs to rotate by positioning through the turntable wheel, which is composed of a fixed turntable bracket and a rotatable turntable. The turntable bracket is used to install the turntable motor group, and the turntable motor group transmits the rotation action to the turntable with the gear ring through meshing, thereby driving the positioning box to rotate. The design is ingenious, the structure is simple, the manufacturing is convenient, and the rotation action is smooth.

[0022] Furthermore, the rotary positioner also includes a guide wheel, which includes an outer fixed bracket and an inner wheel, the wheel is movably connected to the fixed bracket, and the wheel is connected to the positioning box through a wheel connecting rod. The guide wheel is used to improve the stability of the rotation action, and has a simple structure and strong practicality.

[0023] Furthermore, a second feed trough is provided inside the second feeder, and the bottom plates are stacked in sequence from bottom to top in the first feed trough, and the bottom plates are placed vertically; a limit assembly is provided outside the second feeder, and the limit assembly includes a limit bracket, a limit cylinder, and a limit plug plate. The limit bracket is installed on the first feeder, and the limit cylinder is installed on the limit bracket. The limit cylinder is connected to the limit plug plate. The first feeder is provided with an opening 2 at the limit plug plate, and the limit plug plate extends into the second feed trough through the opening 2, or is retracted from the second feed trough to reset; the limit assembly is provided with two groups, namely an upper limit assembly and a lower limit assembly, and the limit plug plate of the lower limit assembly is used to insert and support the bottom plate at the bottom; the limit plug plate of the upper limit assembly is used to insert and support the bottom plate at the second bottom;

[0024] The unloading process of the second feeder: a. Before unloading, the lower limit assembly extends out to support all the bottom plates; b. During unloading, the upper limit assembly extends out, inserts and supports the bottom plate at the second bottom, then the lower limit assembly resets, and the bottom plate falls down to unload; c. For secondary unloading, first extend the lower limit assembly, then reset the upper limit assembly, the bottom plate moves down and is supported by the lower limit assembly; then the upper limit assembly extends out, inserts and supports the bottom plate at the second bottom, at this time the lower limit assembly resets, and the bottom plate falls down to unload; d. Repeat the secondary unloading process to unload the bottom plates in sequence.

[0025] The second feeder of the present invention arranges the bottom plates in sequence from bottom to top in a stacked manner, and realizes orderly and sequential unloading through the limiting process of the upper limit component and the lower limit component, thereby achieving the purpose of automatic and continuous unloading and feeding. It has high unloading efficiency and accurate unloading, avoiding the safety problems existing in manual operation and the problems of inaccurate unloading or feeding.

[0026] Further, step (3): before the base plate is pushed to the rotary positioner, the material is first unloaded into the pusher, the pusher includes a mounting seat and a material unloading receiving piece installed on the mounting seat, a push cylinder and a rotating motor group, the material unloading receiving piece is provided with a receiving groove, the receiving groove and the base plate match each other, the piston rod of the push cylinder passes through the mounting seat and the material unloading receiving piece, and an electromagnet assembly is connected at its end, the base plate is adsorbed by the electromagnet assembly, so as to push the base plate to the rotary positioner; the rotating motor group is connected to the push cylinder, which is used to drive the push cylinder and the base plate to rotate;

[0027] The pushing process of the pusher: the bottom plate is unloaded to the unloading receiving piece, the pushing cylinder is started, and the bottom plate is pushed forward to the rotary positioner, and the welding position of the bottom plate and the table leg is relatively aligned; the pushing cylinder can be reset after the welding operation is completed; after the next bottom plate is unloaded, the above process is repeated to push it to the rotary positioner; the rotating motor group drives the bottom plate to rotate to cooperate with the rotary welding operation in step (4).

[0028] The pusher of the present invention is used to push the bottom plate to the rotary positioner and the table leg for docking and positioning in sequence and continuously. The power of the push is a push cylinder, and the pushing force is direct and the pushing is smooth. Based on the continuous pushing action, continuous welding is achieved, which significantly improves the welding work efficiency. After pushing, the bottom plate can be accurately aligned with the table leg to achieve precise positioning and improve the welding quality. The rotary motor group and the rotary positioner cooperate with each other to achieve rotary welding. After each welding surface is welded, the table leg and the bottom plate rotate synchronously, and the unwelded surface is aligned with the welding gun, which improves the welding efficiency and quality.

[0029] Furthermore, the material receiving part also includes a movable baffle assembly, which includes a movable baffle and a baffle cylinder connected to the movable baffle. The movable baffle is L-shaped and is used to block the opening of the material chute. When unloading, the baffle cylinder is started, and the movable baffle moves to the material chute and blocks its opening. When pushing, the baffle cylinder drives the movable baffle to reset and open the opening of the material chute. The movable baffle assembly is used to block the opening of the material chute. After the bottom plate is unloaded, the opening is blocked by the baffle assembly to prevent the bottom plate from falling. When pushing, the opening can be opened again, so that the bottom plate can be pushed out smoothly, thereby improving the stability of unloading and pushing of the bottom plate.

[0030] The above technical solution has the following beneficial effects:

[0031] The present invention discloses a method for welding table legs for a quick installation lifting table, which adopts a fully automatic workpiece positioning and welding method to realize an assembly line welding process; during the welding process, the table legs and the bottom plate are pre-fed and aligned, and then rotation welding is performed after alignment. After welding is completed, the next table leg and the bottom plate are inserted, and the previously welded table leg is pushed out, thereby achieving the purposes of automatic feeding, automatic positioning and alignment, and automatic discharging.

[0032] The first feeder of the present invention arranges the table legs in sequence from bottom to top in a stacked manner, and realizes orderly and sequential unloading through the supporting process of the upper supporting assembly and the lower supporting assembly, thereby achieving the purpose of automatic and continuous unloading and feeding. It has high unloading efficiency and accurate unloading, avoiding the safety problems existing in manual operation and the problems of inaccurate unloading or feeding.

[0033] The pusher table of the present invention is used to push the table legs into the rotary positioner in sequence and continuously to wait for welding. The pushing power adopts a pusher screw, and the pushing action is smooth and the pushing speed is reasonable, and there will be no problems such as jamming. Based on the continuous pushing action, continuous welding is achieved, which significantly improves the welding work efficiency. After pushing the material, the table leg can accurately enter the welding station of the rotary positioner, achieve accurate positioning, and improve the welding quality.

[0034] The rotary positioner of the present invention has the functions of rotary welding and positioning table legs: a. The table leg positioning function is realized by a positioning cylinder and a positioning pressure rod. After the table leg is pushed into the welding station of the rotary positioner, the positioning cylinder is started to drive the positioning pressure rod to press down, so as to achieve the purpose of pressing and fixing the material, so that the table leg and the base plate are always accurately positioned, thereby improving the welding quality; b. The rotary welding function realizes automatic welding. After each welding surface is welded, the unwelded surface is aligned with the welding gun through a rotating action, thereby improving the welding efficiency and quality.

[0035] The second feeder of the present invention arranges the bottom plates in sequence from bottom to top in a stacked manner, and realizes orderly and sequential unloading through the limiting process of the upper limit component and the lower limit component, thereby achieving the purpose of automatic and continuous unloading and feeding. It has high unloading efficiency and accurate unloading, avoiding the safety problems existing in manual operation and the problems of inaccurate unloading or feeding.

[0036] The pusher of the present invention is used to push the bottom plate to the rotary positioner and the table leg for docking and positioning in sequence and continuously. The power of the push is a push cylinder, and the pushing force is direct and the pushing is smooth. Based on the continuous pushing action, continuous welding is achieved, which significantly improves the welding work efficiency. After pushing, the bottom plate can be accurately aligned with the table leg to achieve precise positioning and improve the welding quality. The rotary motor group and the rotary positioner cooperate with each other to achieve rotary welding. After each welding surface is welded, the table leg and the bottom plate rotate synchronously, and the unwelded surface is aligned with the welding gun, which improves the welding efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below in conjunction with the accompanying drawings:

[0038] Figure 1 It is a structural schematic diagram of automatic welding equipment;

[0039] Figure 2 is a schematic structural diagram of a first feeder;

[0040] Figure 3 is a schematic diagram of the structure of the support assembly;

[0041] Figure 4 It is a structural schematic diagram of the pusher platform;

[0042] Figure 5 It is a structural schematic diagram of the push screw;

[0043] Figure 6 It is a structural schematic diagram of a rotary positioner;

[0044] Figure 7 It is a schematic diagram of the structure of the turntable wheel;

[0045] Figure 8 is a schematic diagram of the structure of the guide wheel;

[0046] Fig. 9 is a schematic structural diagram of a second feeder;

[0047] Fig.10 It is a structural schematic diagram of the limit assembly;

[0048] Fig.11 It is a schematic diagram of the structure of the pusher;

[0049] Fig.12 It is a schematic diagram of the connection between the push cylinder and the rotating motor group;

[0050] Fig.13 Schematic diagram of welding table legs and base plate. DETAILED DESCRIPTION

[0051] The present invention aims to provide a fully automatic workpiece positioning and welding method to realize an assembly line welding process; during the welding process, the table leg and the bottom plate are pre-fed and aligned, and then rotation welding is performed after alignment. After the welding is completed, the next table leg and the bottom plate enter, and the previously welded table leg is pushed out, thereby achieving the purposes of automatic feeding, automatic positioning and alignment, and automatic discharging.

[0052] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0053] A method for welding table legs 8 for quick installation of a lifting table, using automatic welding equipment for welding, comprises the following steps:

[0054] (1) Feeding: feeding the table legs 8 into the first feeder 1 of the automatic welding equipment, and stacking them from top to bottom in the first feeder 1; feeding the bottom plates 9 into the second feeder 6 of the automatic welding equipment, and stacking them from top to bottom in the second feeder 6;

[0055] The first feeder 1 is provided with a first feed trough 11, in which the table legs 8 are stacked in sequence from bottom to top; the first feeder 1 is provided with a support assembly 12 outside, the support assembly 12 comprises a support bracket 122, a support cylinder 121, a cylinder connector 123, a support push plate 124 and a support plate 125, the support bracket 122 is installed on the first feeder 1, the support bracket 122 is installed with a support cylinder 121, the support cylinder 121 is connected to the support push plate 124 through the cylinder connector 123, and the support push plate 124 is connected to the support push plate 124 through the cylinder connector 123. The guide rod 126 passes through the support bracket 122 and is connected to the support plate 125. The first feeder 1 is provided with an opening 1 (not shown in the figure) at the support plate 125. The support plate 125 extends into the first feed trough 11 through the opening 1, or is retracted from the first feed trough 11 to reset. The support assembly 12 is provided with two groups, namely, an upper support assembly 14 and a lower support assembly 13. The support plate 125 of the lower support assembly 13 is used to insert and support the table leg 8 at the bottom; the support plate 125 of the upper support assembly 14 is used to insert and support the table leg 8 at the second bottom.

[0056] The unloading process of the first feeder 1:

[0057] a. Before cutting, the lower support assembly 13 extends to support all the table legs 8;

[0058] b. When unloading, the upper support assembly 14 extends, inserts and supports the table leg 8 at the bottom, and then the lower support assembly 13 is reset, and the table leg 8 at the bottom falls to unload;

[0059] c. Secondary unloading: first extend the lower support assembly 13, then reset the upper support assembly 14, the table leg 8 moves downward and is supported by the lower support assembly 13; then extend the upper support assembly 14, insert and support the second bottom table leg 8, at this time the lower support assembly 13 is reset, and the bottom table leg 8 falls off;

[0060] d. Repeat the second cutting process and cut the table legs 8 one by one.

[0061] The first feeder 1 arranges the table legs 8 in sequence from bottom to top in a stacked manner, and realizes orderly and sequential unloading through the supporting process of the upper supporting component 14 and the lower supporting component 13, thereby achieving the purpose of automatic and continuous unloading and feeding, and its unloading efficiency is high and the unloading is accurate, avoiding the safety problems existing in manual operation and the problems of inaccurate unloading or feeding.

[0062] The second feeder 6 is provided with a second feed trough 61, and the bottom plates 9 are stacked in the first feed trough 11 from bottom to top, and the bottom plates 9 are placed vertically; the second feeder 6 is provided with a limit assembly 62, and the limit assembly 62 includes a limit bracket 622, a limit cylinder 621, and a limit plug 623. The limit bracket 622 is installed on the first feeder 1, and the limit cylinder 621 is installed on the limit bracket 622. The limit cylinder 621 is connected to the limit plug 623, and the first The feeder 1 is provided with an opening 2 (not shown in the figure) at the limiting plug plate 623, and the limiting plug plate 623 extends into the second feed slot 61 through the opening 2, or is retracted from the second feed slot 61 to reset; the limiting assembly 62 is provided with two groups, namely, an upper limiting assembly 64 and a lower limiting assembly 63, and the limiting plug plate 623 of the lower limiting assembly 63 is used to insert and support the bottom plate 9; the limiting plug plate 623 of the upper limiting assembly 64 is used to insert and support the bottom plate 9;

[0063] The unloading process of the second feeder 6:

[0064] a. Before unloading, the lower limit assembly 63 extends to support all the bottom plates 9;

[0065] b. When unloading, the upper limit assembly 64 extends, inserts and supports the bottom plate 9, and then the lower limit assembly 63 is reset, and the bottom plate 9 falls to unload;

[0066] c. Secondary unloading: first extend the lower limit assembly 63, then reset the upper limit assembly 64, the bottom plate 9 moves down and is supported by the lower limit assembly 63; then the upper limit assembly 64 extends, inserts and supports the bottom plate 9 at the second bottom, at this time the lower limit assembly 63 is reset, and the bottom plate 9 falls down to unload;

[0067] d. Repeat the second blanking process and blank the bottom plate 9 in sequence.

[0068] The second feeder 6 arranges the bottom plates 9 in sequence from bottom to top in a stacked manner, and realizes orderly and sequential unloading through the limiting process of the upper limit component 64 and the lower limit component 63, thereby achieving the purpose of automatic and continuous unloading and feeding, and its unloading efficiency is high and the unloading is accurate, avoiding the safety problems existing in manual operation and the problems of inaccurate unloading or feeding.

[0069] (2) Pushing in and aligning the table legs 8 for welding: The table legs 8 are pushed into the rotary positioner 3 from the first feeder 1, and the table legs 8 are clamped after being pushed into place;

[0070] Before the table leg 8 is pushed into the rotary locator 3, it is first unloaded onto the pushing platform 2, and then pushed into the rotary locator 3 by the pushing platform 2. The pushing platform 2 is installed below the first feeder 1, and includes a pushing platform 24 and a pushing screw 25. A pushing track 21 is provided on the pushing platform 24, and a track groove 22 is provided below the pushing track 21. The pushing track 21 is docked with the rotary locator 3, and a pushing screw 25 is installed in the track groove 22. The pushing screw 25 is connected to a pushing plate 23, and the pushing plate 23 extends out of the track groove 22. Through the reciprocating motion of the pushing plate 23, the table legs 8 are pushed into the rotary locator 3 in sequence;

[0071] The pushing process of the pushing platform 2: after the table leg 8 is unloaded onto the pushing platform 2, the pushing plate 23 is located at the rear end of the table leg 8. After the pushing screw is started, it drives the table leg 8 forward and pushes it into the rotary locator 3; after being pushed into place, the pushing screw 25 drives the pushing plate 23 to reset. After the next table leg 8 is unloaded, the above process is repeated to push it into the rotary locator 3.

[0072] The pushing table 2 is used to push the table legs 8 into the rotary positioner 3 in sequence and continuously to wait for welding. The pushing power adopts the pushing screw 25. The pushing action is smooth and the pushing speed is reasonable, and there will be no problems such as jamming. Based on the continuous pushing action, continuous welding is achieved, which significantly improves the welding work efficiency. After pushing, the table legs 8 can accurately enter the welding station of the rotary positioner 3, achieve accurate positioning, and improve the welding quality.

[0073] The push screw 25 includes a screw support 246 and a screw motor 241, a screw 242, a screw nut 243 and a nut seat 244 installed on the screw support 246. The screw motor 241 is connected to the screw 242, the screw nut 243 and the nut seat 244 are connected to the screw 242, and the nut seat 244 is connected to the push plate 23 through the screw connecting rod 245. The push screw 24225 has a simple structure, strong adaptability, and is practical and convenient.

[0074] The rotary positioner 3 includes a turntable wheel 32 and a positioning box 31. The turntable wheel 32 is connected to the positioning box 31 inwardly through a turntable connecting rod 323. A positioning cavity 311 is provided in the positioning box 31, and the positioning cavity 311 matches the table leg 8. The positioning box 31 is also provided with a positioning assembly, which includes a positioning cylinder 34 and a positioning pressure rod (not shown in the figure) connected to the positioning cylinder 34. After the table leg 8 is pushed into the positioning cavity 311, the positioning cylinder 34 is started, driving the positioning pressure rod to press down and fix the table leg 8. The table leg 8 is driven to rotate by the rotary positioner 3 to cooperate with the rotary welding operation of step (4). The rotary positioner 3 has the functions of rotary welding and positioning the table leg 8: a. The function of positioning the table leg 8 is realized by the positioning cylinder 34 and the positioning pressure rod. After the table leg 8 is pushed into the welding station of the rotary positioner 3, the positioning cylinder 34 is started to drive the positioning pressure rod to press down, so as to achieve the purpose of pressing and fixing the material, so that the table leg 8 and the base plate 9 are always accurately positioned, thereby improving the welding quality; b. The rotary welding function realizes automatic welding. After each welding surface is welded, the unwelded surface is aligned with the welding gun through the rotating action, thereby improving the welding efficiency and quality.

[0075] The turntable wheel 32 includes an outer turntable bracket 321 and an inner turntable 322, and the turntable 322 is connected to the positioning box 31 inwardly through a turntable connecting rod 323; the turntable bracket 321 is connected to a turntable motor group 324, and the turntable motor group 324 is connected to a gear (not marked in the figure), and a gear ring (not marked in the figure) is installed on the circumference of the turntable 322, and the gear and the gear ring are meshed with each other to drive the turntable 322 to rotate. The present invention drives the table leg 8 to rotate in position through the turntable wheel 32, which is composed of a fixed turntable bracket 321 and a rotatable turntable 322, and the turntable bracket 321 is used to install the turntable motor group 324, and the turntable motor group 324 transmits the rotation action to the turntable 322 with the gear ring through meshing, thereby driving the positioning box 31 to rotate, and the design is ingenious, the structure is simple, the manufacturing is convenient, and the rotation action is smooth. The rotary positioner 3 also includes a guide wheel 33, which is arranged on both sides of the turntable wheel 32, including an outer fixed bracket 331 and an inner wheel 332, the wheel 332 is movably connected to the fixed bracket 331, and the wheel 332 is connected to the positioning box 31 through a wheel connecting rod 333. The guide wheel 33 is used to improve the stability of the rotation action, and its structure is simple and practical.

[0076] (3) Pushing and welding alignment of the bottom plate 9: The bottom plate 9 is pushed from the second feeder 6 to the rotary positioner 3. After being pushed into place, the table legs 8 are aligned with the bottom plate 9;

[0077] Before the bottom plate 9 is pushed to the rotary positioner 3, the material is first unloaded into the pusher 7. The pusher 7 includes a mounting seat 75 and a material unloading receiving member 71, a pushing cylinder 72 and a rotating motor group 73 installed on the mounting seat 75. The material unloading receiving member 71 is provided with a receiving groove 711, and the receiving groove 711 matches the bottom plate 9. The piston rod of the pushing cylinder 72 passes through the mounting seat 75 and the material unloading receiving member 71, and an electromagnet assembly 721 is connected at its end. The bottom plate 9 includes an iron component, and the electromagnet assembly 721 can adsorb the bottom plate 9, so as to push the bottom plate 9 to the rotary positioner 3; the rotating motor group 73 is connected to the pushing cylinder 72, and is used to drive the pushing cylinder 72 and the bottom plate 9 to rotate;

[0078] The pushing process of the pusher 7: the bottom plate 9 is unloaded to the unloading receiving part 71, and the pushing cylinder 72 is started to drive the bottom plate 9 to be pushed forward to the rotary positioner 3, and the welding position of the bottom plate 9 and the table leg 8 is relatively aligned; the pushing cylinder 72 can be reset after the welding operation is completed; after the next bottom plate 9 is unloaded, the above process is repeated to push it to the rotary positioner 3; the rotating motor group 73 drives the bottom plate 9 to rotate to cooperate with the rotary welding operation in step (4).

[0079] The pusher 7 is used to push the bottom plate 9 sequentially and continuously to the rotary positioner 3 and the table leg 8 for docking and positioning. The power of the push is a push cylinder 72, and the push force is direct and the push is smooth. Based on the continuous pushing action, continuous welding is achieved, which significantly improves the welding work efficiency. After pushing, the bottom plate 9 can be accurately aligned with the table leg 8 to achieve precise positioning and improve the welding quality. The rotating motor group 73 cooperates with the rotary positioner 3 to achieve rotary welding. After each welding surface is welded, the table leg 8 and the bottom plate 9 rotate synchronously to align the unwelded surface with the welding gun, thereby improving the welding efficiency and quality.

[0080] The material receiving member 71 also includes a movable baffle assembly, and the movable baffle assembly 74 includes a movable baffle 741 and a baffle cylinder 742 connected to the movable baffle 741. The movable baffle 741 is L-shaped and is used to block the opening of the material chute; when material is unloaded, the baffle cylinder 742 is started, and the movable baffle 741 moves upward to the material chute and blocks its opening; when pushing, the baffle cylinder 742 drives the movable baffle 741 to reset, open the opening of the material chute, and the pushing cylinder 72 can drive the bottom plate 9 to push. The movable baffle 741 assembly is used to block the opening of the material chute. After the bottom plate 9 is unloaded, the opening is blocked by it to prevent the bottom plate 9 from falling. When pushing, the opening can be opened again, so that the bottom plate 9 can be pushed out smoothly, thereby improving the stability of unloading and pushing of the bottom plate 9.

[0081] (4) Rotary welding: Use a welding gun to weld the table legs 8 and the base plate 9. The welding is divided into four stages:

[0082] a. First stage: welding the table leg 8 and the first surface of the bottom plate 9 in advance with a welding gun, and rotating 90° after welding;

[0083] b. The second stage: welding the table leg 8 and the second side of the bottom plate 9 with a welding gun, and rotating 90° after welding;

[0084] c. The third stage: welding the table leg 8 and the third surface of the bottom plate 9 with a welding gun, and rotating 90° after welding;

[0085] d. The fourth stage: the welding gun welds the table leg 8 and the fourth surface of the bottom plate 9. After the welding is completed, it is rotated 90 degrees to reset to the initial state. The welding process of the table leg 8 and the bottom plate 9 is completed.

[0086] (5) Ejecting the material: Repeat step (2), and the next table leg 8 is pushed from the first feeder 1 to the rotary positioner 3 under the action of the pushing platform 2, and the finished product that has been welded in step (4) is ejected at the same time, and the finished product falls onto the material platform;

[0087] (6) Repeat steps (1) to (5) until the welding operation is completed.

[0088] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A method for welding table legs for quick installation of a lifting table, characterized in that: Welding is performed using automatic welding equipment, including the following steps: (1) Feeding: feeding the table legs into the first feeder of the automatic welding equipment, and stacking them from top to bottom in the first feeder; feeding the bottom plates into the second feeder of the automatic welding equipment, and stacking them from top to bottom in the second feeder; The second feeder is provided with a second feed trough, the bottom plates are stacked in sequence from bottom to top in the second feed trough, and the bottom plates are placed vertically; the second feeder is provided with a limit assembly outside, the limit assembly includes a limit bracket, a limit cylinder, and a limit plug plate, the limit bracket is installed on the first feeder, the limit bracket is installed with a limit cylinder, the limit cylinder is connected to the limit plug plate, the first feeder is provided with an opening 2 at the limit plug plate, the limit plug plate extends into the second feed trough through the opening 2, or is retracted from the second feed trough to reset; the limit assembly is provided with two groups, namely an upper limit assembly and a lower limit assembly, the limit plug plate of the lower limit assembly is used to insert and support the bottom plate at the bottom; the limit plug plate of the upper limit assembly is used to insert and support the bottom plate at the second bottom; The unloading process of the second feeder is as follows: a. before unloading, the lower limit assembly extends to support all the bottom plates; b. during unloading, the upper limit assembly extends to insert and support the bottom plate at the second bottom, and then the lower limit assembly is reset, and the bottom plate falls to unload; c. Secondary unloading: first extend the lower limit assembly, then reset the upper limit assembly, the bottom plate moves downward and is supported by the lower limit assembly; then the upper limit assembly extends, inserts and supports the bottom plate at the second bottom, at this time the lower limit assembly resets, and the bottom plate falls down to unload; d. Repeat the secondary unloading process to unload the bottom plate in sequence; (2) Table leg welding alignment: the table leg is pushed into the rotary positioner from the first feeder, and the table leg is clamped after being pushed into place; (3) Bottom plate welding alignment: the bottom plate is pushed from the second feeder to the rotary positioner, and after being pushed into place, the table legs are aligned with the bottom plate; Before the bottom plate is pushed to the rotary positioner, the material is first unloaded into the pusher, and the pusher includes a mounting seat and a material unloading receiving piece mounted on the mounting seat, a pushing cylinder and a rotating motor group, and the material unloading receiving piece is provided with a receiving groove, and the receiving groove and the bottom plate are matched with each other, and the piston rod of the pushing cylinder passes through the mounting seat and the material unloading receiving piece, and an electromagnet assembly is connected at its end, and the bottom plate is adsorbed by the electromagnet assembly, so as to push the bottom plate to the rotary positioner; The rotating motor group is connected to the pushing cylinder and is used to drive the pushing cylinder and the bottom plate to rotate; The pushing process of the pusher: the bottom plate is unloaded to the unloading receiving piece, the pushing cylinder is started, and the bottom plate is pushed forward to the rotary positioner, and the welding position of the bottom plate and the table leg is aligned; the pushing cylinder can be reset after the welding operation is completed; after the next bottom plate is unloaded, the above process is repeated to push it to the rotary positioner; the rotating motor group drives the bottom plate to rotate to cooperate with the rotary welding operation of step (4); (4) Rotational welding: The table legs and the base plate are welded using a welding gun. The welding is divided into four stages. Each stage welds the part that the welding gun is aimed at. After each stage of welding is completed, the welding gun is rotated 90° to weld the next stage until the welding is completed. (5) Ejecting the material: repeating step (2), pushing the next table leg from the first feeder to the rotary positioner, and ejecting the finished product welded in step (4) at the same time, and the finished product falls onto the material table; (6) Repeat steps (1) to (5) until the welding operation is completed.

2. A method for welding table legs for quick installation of a lifting table according to claim 1, characterized in that: A first feed trough is provided inside the first feed trough, and the table legs are stacked in sequence from bottom to top in the first feed trough; a support assembly is provided outside the first feeder, and the support assembly includes a support bracket, a support cylinder, a cylinder connecting piece, a support push plate and a support plate, the support bracket is installed on the first feeder, and a support cylinder is installed on the support bracket, the support cylinder is connected to the support push plate through the cylinder connecting piece, and the support push plate passes through the support bracket and is connected to the support plate through a guide rod, and the first feeder is provided with an opening one at the support plate, and the support plate extends into the first feed trough through the opening one, or is retracted from the first feed trough to reset; the support assembly is provided with two groups, namely an upper support assembly and a lower support assembly, the support plate of the lower support assembly is used to insert and support the table legs at the bottom; the support plate of the upper support assembly is used to insert and support the table legs at the second bottom; The unloading process of the first feeder is as follows: a. before unloading, the lower support assembly extends to support all the table legs; b. during unloading, the upper support assembly extends, inserts and supports the table legs at the bottom, and then the lower support assembly is reset, and the table legs at the bottom fall down to unload; c. Secondary cutting: first extend the lower support assembly, then reset the upper support assembly, the table legs move downward and are supported by the lower support assembly; then extend the upper support assembly, insert and support the table legs at the bottom, at this time the lower support assembly is reset, and the table legs at the bottom fall down; d. Repeat the secondary cutting process and cut the table legs in sequence.

3. A method for welding table legs for quick installation of a lifting table according to claim 2, characterized in that: The step (2): before the table legs are pushed into the rotary locator, they are first unloaded onto a pushing table, and then pushed into the rotary locator by the pushing table. The pushing table is installed below the first feeder, and includes a pushing table top and a pushing screw. A pushing track is provided on the pushing table top, and a track groove is provided below the pushing track. The pushing track is docked with the rotary locator, and a pushing screw is installed in the track groove. The pushing screw is connected to a pushing plate, and the pushing plate extends out of the track groove. Through the reciprocating motion of the pushing plate, the table legs are pushed into the rotary locator in sequence. The pushing process of the pushing platform: after the table leg is unloaded onto the pushing platform, the pushing plate is located at the rear end of the table leg, and after the pushing screw is started, it drives the table leg forward and pushes it into the rotary locator; after being pushed into place, the pushing screw drives the pushing plate to reset, and after the next table leg is unloaded, the above process is repeated to push it into the rotary locator.

4. A method for welding table legs for quick installation of a lifting table according to claim 3, characterized in that: The push screw includes a screw support and a screw motor, a screw, a screw nut and a nut seat installed on the screw support. The screw motor is connected to the screw, and the screw is connected to the screw nut and the nut seat. The nut seat is connected to the push plate through the screw connecting rod.

5. A method for welding table legs for quick installation of a lifting table according to claim 1, characterized in that: The rotary positioner includes a turntable wheel and a positioning box, the turntable wheel is connected to the positioning box inwardly through a turntable connecting rod, a positioning cavity is provided in the positioning box, and the positioning cavity matches the table leg; the positioning box is also provided with a positioning assembly, and the positioning assembly includes a positioning cylinder and a positioning pressure rod connected to the positioning cylinder; after the table leg is pushed into the positioning cavity, the positioning cylinder is started to drive the positioning pressure rod to press down and fix the table leg; the table leg is driven to rotate by the rotary positioner to cooperate with the rotary welding operation of step (4).

6. A method for welding table legs for quick installation of a lifting table according to claim 5, characterized in that: The turntable wheel includes an outer turntable bracket and an inner turntable, and the turntable is connected to the positioning box inwardly through a turntable connecting rod; the turntable bracket is connected to a turntable motor group, and the turntable motor group is connected to a gear. A gear ring is installed on the circumference of the turntable, and the gear and the gear ring are meshed with each other to drive the turntable to rotate.

7. A method for welding table legs for quick installation of a lifting table according to claim 6, characterized in that: The rotary positioner also includes a guide wheel, which includes an outer fixed bracket and an inner rotating wheel. The rotating wheel is movably connected in the fixed bracket, and the rotating wheel is connected to the positioning box through a rotating wheel connecting rod.

8. A method for welding table legs for quick installation of a lifting table according to claim 1, characterized in that: The material unloading receiving part also includes a movable baffle assembly, which includes a movable baffle and a baffle cylinder connected to the movable baffle, and the movable baffle is L-shaped and used to block the opening of the material unloading chute; when unloading, the baffle cylinder is started, and the movable baffle moves to the material unloading chute and blocks its opening; when pushing, the baffle cylinder drives the movable baffle to reset and open the opening of the material unloading chute.

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