An automated welding workstation for the scissor arms of a lift

Abstract

The present invention relates to an automatic welding workstation for a lift scissor arm, which includes two processing positions longitudinally distributed, and a welding robot arranged on one side of the processing positions and capable of reciprocating longitudinally on the sides of the two processing positions. The processing positions respectively include a welding positioner and a positioning mechanism rotatably installed on the welding positioner. The two positioning mechanisms respectively include an outer frame. Inside one outer frame, positioning component I, positioning component II and positioning component III are arranged longitudinally in parallel. Inside the other outer frame, two end positioning components and one intermediate positioning component are arranged longitudinally in parallel. The two end positioning components are symmetrically arranged on both sides of the intermediate positioning component. The present invention can achieve precise positioning of the scissor arm, and can realize alternating positioning and welding through the cooperation of two processing positions and one welding robot, ensuring the welding quality while improving the welding efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of the processing of scissor arms for elevators, and particularly relates to an automatic welding workstation for scissor arms of an elevator. Background Art

[0002] When processing the scissor arms used in an elevator, generally, each component of each scissor arm is manually positioned by a worker and then welded one by one. This not only takes time and effort, but also has poor positioning accuracy, low welding efficiency, and the welding quality cannot be guaranteed. Summary of the Invention

[0003] The purpose of the invention is to provide an automatic welding workstation for scissor arms of an elevator to solve the problem of low welding efficiency.

[0004] The automatic welding workstation for scissor arms of an elevator of the invention is realized as follows:

[0005] An automatic welding workstation for scissor arms of an elevator includes two processing positions distributed longitudinally, and a welding robot arranged on one side of the processing positions and capable of reciprocating longitudinally on the sides of the two processing positions. Each of the processing positions includes a welding positioner and a positioning mechanism rotatably installed on the welding positioner. Among them,

[0006] The two positioning mechanisms respectively include outer frames. Inside one of the outer frames, positioning component I, positioning component II, and positioning component III are arranged longitudinally in parallel. Inside the other outer frame, two end positioning components and one middle positioning component are arranged longitudinally in parallel. The two end positioning components are symmetrically arranged on both sides of the middle positioning component.

[0007] Furthermore, the positioning component I, positioning component II, positioning component III, end positioning component, and middle positioning component respectively include longitudinally symmetrically arranged longitudinal support seats, and the longitudinal support seats on the same longitudinal side are on the same straight line;

[0008] The positioning component I, positioning component III, and end positioning component also respectively include end positioning seats corresponding to their longitudinal support seats one by one.

[0009] Furthermore, the positioning component I includes positioning grooves respectively arranged on the outer sides of the two end positioning seats. A stop block is arranged on the outer side of one of the positioning grooves, and a quick clamp is arranged on one side of the other positioning groove. A pin capable of passing through the side wall of the corresponding positioning groove and extending into the positioning groove is arranged at the telescopic end of the quick clamp.

[0010] Furthermore, the end positioning component includes a transverse support seat, and the transverse support seat is arranged between the two longitudinal support seats. A pressing mechanism corresponding to it is installed on the side of the transverse support seat facing the middle positioning component.

[0011] Furthermore, the positioning assembly II, the positioning assembly III, the end positioning assembly, and the intermediate positioning assembly each include two positioning cylinders symmetrically arranged longitudinally. The telescopic ends of the two positioning cylinders in the same group face each other, and inner positioning seats are respectively arranged corresponding to the inner sides of each positioning cylinder.

[0012] Furthermore, a positioning pin is arranged at the end of the piston rod of the positioning cylinder, and a positioning hole corresponding to the positioning pin is arranged on the inner positioning seat.

[0013] Furthermore, the positioning pins of the positioning assembly III and the end positioning assembly are diamond pins.

[0014] Furthermore, on one side of the positioning assembly I and the positioning assembly III facing the positioning assembly II, and on one side of the end positioning assembly facing the intermediate positioning assembly, jacking seats are respectively arranged, and a jacking cylinder with a piston rod facing upward is arranged below the jacking seat.

[0015] Furthermore, the welding robot is installed on the seat plate, and the seat plate is movably installed on a longitudinally arranged track.

[0016] Furthermore, a translation motor is arranged on the seat plate. The output shaft of the translation motor passes through the seat plate downward and is connected with a gear, and a longitudinally arranged rack meshing with the gear is installed on the track.

[0017] After adopting the above technical solutions, the beneficial effects of the present invention are as follows:

[0018] (1) Since the positioning mechanism is provided in the present invention, accurate positioning of scissor arms with different structures can be achieved, eliminating the need for manual measurement and positioning, ensuring the welding quality, and improving the efficiency of welding positioning.

[0019] (2) The positioning mechanism of the present invention can rotate under the drive of the welding positioner, so as to ensure that the welding surface is always in a horizontal plane during the welding process, further ensuring the welding quality of the scissor arm.

[0020] (3) Since the present invention is provided with two processing positions, and the welding robot can reciprocate on the sides of the two processing positions, alternating positioning and welding of two scissor arms can be achieved, thereby further improving the welding efficiency and the degree of automation of scissor arm processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the drawings and embodiments.

[0022] Figure 1 is a structural diagram of an automatic welding workstation for a lift scissor arm according to a preferred embodiment of the present invention;

[0023] Figure 2It is the structural diagram of the automatic welding workstation for the lift scissors arm in the preferred embodiment of the present invention;

[0024] Figure 3 It is the structural diagram of the workstation where the first positioning mechanism of the automatic welding workstation for the lift scissors arm in the preferred embodiment of the present invention is located;

[0025] Figure 4 It is Figure 3 The enlarged view of part A in;

[0026] Figure 5 It is Figure 3 The enlarged view of part B in;

[0027] Figure 6 It is Figure 3 The enlarged view of part C in;

[0028] Figure 7 It is the structural diagram of the second positioning mechanism of the automatic welding workstation for the lift scissors arm in the preferred embodiment of the present invention;

[0029] Figure 8 It is Figure 7 The enlarged view of part D in;

[0030] Figure 9 It is Figure 7 The enlarged view of part E in;

[0031] Figure 10 It is Figure 7 The enlarged view of part F in;

[0032] Figure 11 It is the structural diagram of the welding robot and its track part of the automatic welding workstation for the lift scissors arm in the preferred embodiment of the present invention;

[0033] Figure 12 It is the positioning state diagram of the automatic welding workstation for the lift scissors arm in the preferred embodiment of the present invention;

[0034] Figure 13 The structural diagram of the scissors arm I applying the preferred embodiment of the present invention;

[0035] Figure 14 The structural diagram of the scissors arm II applying the preferred embodiment of the present invention;

[0036] In the figure: the first positioning mechanism 1, outer frame I 101, longitudinal support base I 102, end positioning base I 103, positioning groove 104, positioning cylinder I 105, inner positioning base I 106, cross beam I 107, U-shaped mounting plate 108, quick clamp 109, dowel pin 110, stop block 111, connecting rod 112, positioning pin I 113, positioning hole I 114, guide pin I 115, fixing plate I 116, lifting base I 117, lifting cylinder I 118, connecting plate I 119, "I"-shaped mounting plate 120, second positioning mechanism 2, outer frame II 201, longitudinal support base II 202, end positioning base II 203, transverse support base 204, positioning cylinder II 205, inner positioning base II 206, cross beam II 207, end mounting plate 208, middle mounting plate 209, pressing mechanism 210, positioning pin II 211, positioning hole II 212, guide pin II 213, fixing plate II 214, lifting base II 215, lifting cylinder II 216, connecting plate II 217, welding positioner 3, active unit 31, driven unit 32, base 33, welding robot 41, seat plate 42, wire reel 43, gun cleaning machine 44, translation motor 45, track 5, rack 51, guide rail seat 52, linear guide rail 53, limit block 54, vertical rod 61, horizontal rod 62, long bushing 63, short bushing 64. Detailed implementation mode

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0039] As Figure 13 shown, the scissors arm I applicable to positioning of one of the processing positions provided by this embodiment includes two vertically arranged parallel rods 61, and a long bushing 63 passing through the two vertical rods 61 is installed at one end of the two vertical rods 61, and a short bushing 64 is installed at the other end and the middle position of the vertical rod 61 respectively.

[0040] As Figure 14As shown in the figure, the scissors arm II applicable to the positioning of another processing position provided by this embodiment includes two vertically arranged vertical rods 61, and two horizontally arranged cross rods 62 parallel to each other and perpendicular to the vertical rods 61 are welded between the two vertical rods 61, and short bushings 64 are welded at both ends and in the middle of the vertical rods 61 respectively.

[0041] As Figure 1-12 As shown in the figure, a lift scissors arm automatic welding workstation includes two longitudinally distributed processing positions, and a welding robot 41 arranged on one side of the processing positions and capable of longitudinally reciprocatingly moving on the sides of the two processing positions. The processing positions respectively include a welding positioner 3 and a positioning mechanism rotatably installed on the welding positioner 3. The two positioning mechanisms respectively include outer frames. In one of the outer frames, positioning component I, positioning component II and positioning component III are longitudinally arranged in parallel. In the other outer frame, two end positioning components and one middle positioning component are longitudinally arranged in parallel. The two end positioning components are symmetrically arranged on both sides of the middle positioning component.

[0042] Specifically, the first positioning mechanism 1 includes an outer frame I 101, and positioning component I, positioning component II and positioning component III installed in the outer frame I 101, while the second positioning mechanism 2 includes an outer frame II 201, and a middle positioning component and two end positioning components installed in the outer frame II 201.

[0043] In addition, three horizontally distributed cross beams are respectively installed in the outer frame I 101 and the outer frame II 201. Among them, "I"-shaped mounting plates 120 and two U-shaped mounting plates 108 are respectively arranged on the three cross beams I 107 of the outer frame I 101. The "I"-shaped mounting plate 120 is used to mount positioning component II, and the two U-shaped mounting plates 108 arranged back to back are respectively used to mount positioning component I and positioning component III.

[0044] Among the three cross beams II 207 in the outer frame II 201, "mountain"-shaped end mounting plates 208 are arranged on the cross beams II 207 located on both sides, and an "I"-shaped middle mounting plate 209 is installed on the cross beam II 207 located in the middle. The end mounting plate 208 is used to mount the end positioning component, and the middle mounting plate 209 is used to mount the middle positioning component.

[0045] Specifically, the cross beam and the outer frame are connected by welding.

[0046] Connection plates are respectively arranged at both ends of the outer frame, and the outer frame is detachably connected to the welding positioner 3 through the connection plates and the bolts installed on the connection plates, so that different positioning mechanisms can be replaced according to the specific shape and specifications of the scissors arm 6 to realize the welding positioning of different scissors arms 6.

[0047] Specifically, the outer frame I 101 is connected to the corresponding welding positioner 3 through the connecting plates I 119 at both ends thereof, while the outer frame II 201 is connected to the corresponding welding positioner 3 through the connecting plates II 217 at both ends thereof.

[0048] During welding, to ensure the welding quality, it is necessary to ensure that the welding surface is on a horizontal plane. Therefore, in order to weld the scissor arm 6 in all directions, it is necessary to rotate it. In this embodiment, in order to rotate the positioning mechanism, the positioning mechanism is installed on the welding positioner 3.

[0049] Specifically, the welding positioner 3 includes a base 33 and a driving unit 31 and a driven unit 32 oppositely installed at both ends of the base 33. The positioning mechanism is installed between the driving unit 31 and the driven unit 32. Among them, a driving member such as but not limited to a motor is installed in the driving unit 31, and the positioning mechanism is rotatably connected to the driven unit 32 by connecting members such as bearings. Through the cooperation of the motor of the driving unit 31 and the driven unit 32, the positioning mechanism can be driven to rotate reciprocally by 360°, so that the corresponding welding points can be rotated to the horizontal plane during the welding process, thereby ensuring the welding quality.

[0050] In order to position and support the vertical rod 61, the positioning assembly I, the positioning assembly II, the positioning assembly III, the end positioning assembly and the intermediate positioning assembly respectively include longitudinally symmetrically arranged longitudinal support seats, and the longitudinal support seats located on the same longitudinal side are on the same straight line; the positioning assembly I, the positioning assembly III and the end positioning assembly also respectively include end positioning seats corresponding to their longitudinal support seats one by one.

[0051] The end positioning seat is used to position the end of the vertical rod 61, while the longitudinal support seat supports below the vertical rod 61.

[0052] The longitudinal support seat is used for positioning and supporting the vertical rod 61. Therefore, the longitudinal support seat has a U-shaped structure with a longitudinal opening.

[0053] Specifically, the positioning assembly I and the positioning assembly III include two longitudinal support seats I 102 and two end positioning seats I 103, and the positioning assembly II includes four longitudinal support seats I 102. The longitudinal support seats I 102 and the end positioning seats I 103 located on the same longitudinal side are on the same straight line, and are used for positioning and supporting the same vertical rod 61.

[0054] The end positioning assembly includes two longitudinal support seats II 202 and two end positioning seats II 203, and the intermediate positioning assembly includes four longitudinal support seats II 202. Similarly, the longitudinal support seats II 202 and the end positioning seats II 203 located on the same longitudinal side are on the same straight line, and are used for positioning and supporting the same vertical rod 61.

[0055] In order to achieve the positioning of the long shaft sleeve 63, the positioning component I includes positioning grooves 104 respectively arranged on the outside of the two end positioning seats, wherein a stop block 111 is arranged on the outside of one positioning groove 104, and a quick clamp 109 is arranged on one side of the other positioning groove 104, and the telescopic end of the quick clamp 109 is provided with a pin 110 that can pass through the side wall of the corresponding positioning groove 104 and extend into the positioning groove 104.

[0056] Specifically, the quick clamp 109 is a manual push-pull quick clamp 109, the positioning groove 104 is a horizontal V-shaped groove, the long shaft sleeve 63 is placed horizontally in the positioning groove 104, and a through hole is set on the side wall of one end thereof. When positioning, the end of the long shaft sleeve 63 with the through hole is set in the positioning groove 104 where the quick clamp 109 is located, and the through hole is placed in the direction of the pin 110. The quick clamp 109 is moved, and its pin 110 is inserted into the through hole through the side wall of the positioning groove 104, so as to realize the positioning of the long shaft sleeve 63 and prevent it from rotating or moving in its axial direction. The other end of the long shaft sleeve 63 is placed in another positioning groove 104, and the end is against the inner side of the block 111, so as to realize the precise positioning of the long shaft sleeve 63 as a whole in combination with another positioning groove 104 and the quick clamp 109.

[0057] Specifically, the positioning groove 104 with the quick clamp 109 is fixedly mounted on the inner wall of the outer frame through a connecting rod 112 , while the other positioning groove 104 is directly fixedly mounted on the side wall of the outer frame through a stopper 111 .

[0058] In order to achieve the positioning of the cross bar 62, the end positioning assembly includes a cross support seat 204, and the cross support seat 204 is arranged between the two longitudinal support seats. A corresponding clamping mechanism 210 is installed on the side of the cross support seat 204 facing the middle positioning assembly.

[0059] Specifically, the transverse support seat 204 is a parallel, transverse double U-shaped structure, and is arranged on the side of the inner positioning seat of the end positioning assembly facing the middle positioning assembly, and the clamping mechanism 210 is arranged above the middle thereof.

[0060] The clamping mechanism 210 is used to cooperate with the cross support seat 204 to achieve positioning and fixing of the cross bar 62. For easy operation, the clamping mechanism 210 is a pneumatic quick clamp.

[0061] During the use of the pneumatic quick clamp, the piston of the cylinder extends, driving the pressure arm connected thereto to rotate downward so as to press against the top of the cross bar 62, thereby fixing the cross bar 62. On the contrary, when the piston rod of the cylinder retracts, the pressure arm can be driven to rotate upward, thereby loosening the cross bar 62.

[0062] Preferably, the pneumatic quick clamp can be selected from, but not limited to, the pneumatic quick clamp numbered CH-12265 produced by Shanghai Nuclear Jia Electromechanical Materials Co., Ltd.

[0063] In order to fix both ends of the short bushing 64, the positioning assembly II, the positioning assembly III, the end positioning assembly and the intermediate positioning assembly respectively include two positioning cylinders symmetrically arranged longitudinally. The telescopic ends of the two positioning cylinders in the same group are arranged facing each other, and an inner positioning seat is respectively arranged corresponding to the inner side of each positioning cylinder.

[0064] The piston rod of the positioning cylinder can position the outer end of the short bushing 64, while the inner positioning seat can position the inner end of the short bushing 64 to prevent its axial movement.

[0065] Specifically, the positioning assembly II and the positioning assembly III respectively include two positioning cylinders I 105 with telescopic ends facing each other, and inner positioning seats I 106 corresponding to each positioning cylinder I 105.

[0066] The end positioning assembly and the intermediate positioning assembly respectively include two positioning cylinders II 205 with telescopic ends facing each other, and inner positioning seats II 206 corresponding to each positioning cylinder II 205.

[0067] Preferably, the outer side of the positioning cylinder is installed on the inner wall of the outer frame through a fixing plate. Specifically, a fixing plate I 116 is welded at the corresponding position on the inner wall of the outer frame I 101, and the positioning cylinder I 105 is installed on the fixing plate I 116 through bolts. Similarly, a fixing plate II 214 is welded at the corresponding position on the inner wall of the outer frame II 201, and the positioning cylinder II 205 is installed on the fixing plate II 214 by using bolts.

[0068] In order to position the short bushing 64, a positioning pin is arranged at the end of the piston rod of the positioning cylinder, and a positioning hole corresponding to the positioning pin is arranged on the inner positioning seat.

[0069] Preferably, a guide pin with an outer diameter smaller than that of the positioning pin is arranged at the end of the positioning pin.

[0070] The positioning pin is floatingly connected to the piston rod of the positioning cylinder. The bushing is installed in the machined mounting hole on the vertical rod 61. The piston rod of the positioning cylinder extends out, the positioning pin passes through the short bushing 64 and the guide pin extends into the positioning hole. At this time, the short bushing 64 is sleeved on the positioning pin, and its radial direction can be fixed by the positioning pin. At the same time, both ends of the short bushing 64 can also be fixed by the inner positioning seat and the piston rod to prevent its axial movement.

[0071] Specifically, the piston rod end of the positioning cylinder Ⅰ105 is installed with a positioning pin Ⅰ113 and a guide pin Ⅰ115, and the piston rod end of the positioning cylinder Ⅱ205 is installed with a positioning pin Ⅱ211 and a guide pin Ⅱ213. The inner positioning seat Ⅰ106 is provided with a positioning hole Ⅰ114, and the inner positioning seat Ⅱ206 is provided with a positioning hole Ⅱ212.

[0072] Preferably, the positioning cylinder may be selected from but is not limited to a cylinder of model ACQD125*200S.

[0073] In order to prevent over-positioning, the positioning pins of positioning component III and the end positioning component are diamond pins.

[0074] The use of diamond pins allows the workpiece to have a small error to ensure normal welding.

[0075] After the scissor arm 6 is welded, in order to facilitate its removal, a lifting seat is provided on the side of positioning component I and positioning component III facing the positioning component II, and on the side of the end positioning component facing the middle positioning component, and a lifting cylinder with a piston rod facing upward is provided below the lifting seat.

[0076] Specifically, the lifting seat is a U-shaped structure in the same direction as the longitudinal support seat, and the scissor arm 6 can be supported therein when the lifting seat is raised.

[0077] After the welding of the scissor arm 6 is completed, the piston rod of the lifting cylinder is extended to lift the scissor arm 6 through the lifting seat, thereby facilitating its removal from the positioning mechanism.

[0078] Specifically, the lifting cylinder is installed on the beam below the corresponding positioning assembly.

[0079] Preferably, the lifting cylinder can be selected from but is not limited to a cylinder of model ACQ63*50.

[0080] Among them, the positioning components I and III correspond to the lifting seat I 117 and the lifting cylinder I 118, and the end positioning components correspond to the lifting seat II 215 and the lifting cylinder II 216.

[0081] In order to improve the processing efficiency, the workstation is equipped with two parallel processing positions, and the same welding robot 41 is used for welding. While one of the processing positions is in the process of welding, the scissor arm 6 can be replaced in the other processing position, that is, the welded scissor arm 6 is removed and the next scissor arm 6 to be welded is placed on the processing position. Therefore, the welding robot 41 needs to be reciprocated on the sides of the two processing positions. In order to realize the movement of the welding robot 41, the welding robot 41 is installed on the seat plate 42, and the seat plate 42 is movably installed on the longitudinally arranged track 5.

[0082] Preferably, the welding robot 41 is an OTC welding machine robot of model BL6.

[0083] In addition, on one side of the welding robot 41, there is a wire bucket 43 fixed on the seat plate 42, and on the other side, there is a gun cleaning machine 44 for cleaning the welding gun of the welding robot 41.

[0084] The setting of the gun cleaning machine 44 can clean the welding gun head of the welding robot to ensure the welding quality.

[0085] In order to drive the movement of the welding robot 41, a translation motor 45 is arranged on the seat plate 42. The output shaft of the translation motor 45 passes through the seat plate 42 downward and is connected with a gear. A rack 51 longitudinally arranged and meshing with the gear is installed on the track 5.

[0086] Specifically, the track includes a guide rail seat 52 and two linear guide rails 53 longitudinally installed on the guide rail seat 52. The rack 51 is installed between the two linear guide rails 53 and is parallel to the linear guide rails 53. The bottom of the seat plate 42 is slidably installed on the linear guide rails 53 to realize the guiding of the movement of the seat plate 42.

[0087] Preferably, limit blocks 54 are respectively installed at both ends of the linear guide rail 53 to limit the movement of the seat plate 42 and prevent it from falling off the linear guide rail 53.

[0088] The entire workstation is installed on a workstation table, and safety partitions (not shown in the figure) are respectively arranged on three sides of the workstation table. Safety light grids (not shown in the figure) are installed in pairs on the workstation to ensure the safety of workers during the processing.

[0089] In addition, in order to realize the operation control of the entire workstation, a control cabinet (not shown in the figure) is arranged on the side of the track away from the processing position.

[0090] When processing the scissors arm I, the piston rods of the respective positioning cylinders I105 and the lifting cylinders I118 are in the retracted state. The vertical rod 61 assembled with the long bushing 63 and the short bushing 64 is placed on the longitudinal support seat I102 between the end positioning seats I103. The piston rod of the positioning cylinder I105 extends, and the positioning of each short bushing 64 is realized by using the positioning pin I113 to cooperate with the inner positioning block I. The toggle quick clamp 109 can position the long bushing 63 through the pin 110. At this time, the precise positioning of each component forming the scissors arm I is realized. Then, according to the welding position to be welded, the welding positioner 3 is used to drive the first positioning mechanism 1 to rotate so that the welding position to be welded is in the horizontal plane, facilitating the welding operation.

[0091] When processing the scissors arm II, the piston rods of the positioning cylinders II 205, the lifting cylinders II 216 and the cylinders of the clamping mechanism 210 are all in the retracted state. Place the vertical rod 61 equipped with the short bushing 64 on the longitudinal support base II 202 between the end positioning seats II 203, place the cross bar 62 on the cross support base 204, then the piston rod of the positioning cylinder II 205 extends, and the short bushings 64 and the vertical rod 61 are positioned by using the positioning pin II 211 in cooperation with the inner positioning block II. The piston rod of the cylinder of the clamping mechanism 210 extends and uses its pressing block to fix the cross bar 62 in the cross support base 204. Then, according to the welding position required, use the welding positioner 3 to drive the second positioning mechanism 2 to rotate, so that the welding position is on the horizontal plane, which is convenient for welding.

[0092] During the welding process, the welding positioner 3 can rotate 360°, so as to realize the all-round welding of the entire scissors arm 6.

[0093] During the processing of the workstation, when the first positioning mechanism 1 is in the welding processing state, the second positioning mechanism 2 is in the replacement state of the scissors arm 6, that is, the welded scissors arm 6 II is removed from the second positioning mechanism 2, and another scissors arm 6 II to be processed is replaced and positioned. At this time, the scissors arm 6 I on the first positioning mechanism 1 is welded, and the welding robot 41 moves to one side of the second positioning mechanism 2 to weld the scissors arm 6 II, and at the same time, the scissors arm 6 I on the first positioning mechanism 1 can be replaced. In this way, alternate processing is carried out to reduce the time difference and improve the processing efficiency.

[0094] Inspired by the ideal embodiments of the present invention described above, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An automated welding workstation for the scissor arm of a lift, characterized in that, It includes two processing positions distributed longitudinally, and a welding robot (41) arranged on one side of the processing positions and capable of reciprocating longitudinally on the sides of the two processing positions. The processing positions respectively include a welding positioner (3) and a positioning mechanism rotatably installed on the welding positioner (3). Among them, the two positioning mechanisms respectively include outer frames. Inside one outer frame, positioning component I, positioning component II, and positioning component III are arranged longitudinally in parallel. Inside the other outer frame, two end positioning components and one middle positioning component are arranged longitudinally in parallel. The two end positioning components are symmetrically arranged on both sides of the middle positioning component; positioning component I, positioning component II, positioning component III, the end positioning component, and the middle positioning component respectively include longitudinally symmetrically arranged longitudinal support seats, and the longitudinal support seats on the same longitudinal side are on the same straight line; positioning component I, positioning component III, and the end positioning component also respectively include end positioning seats arranged corresponding to their longitudinal support seats one by one; positioning component I includes positioning grooves (104) respectively arranged on the outer sides of the two end positioning seats. A stop block (111) is arranged on the outer side of one positioning groove (104), and a quick clamp (109) is arranged on one side of the other positioning groove (104). A pin (110) capable of passing through the side wall of the corresponding positioning groove (104) and extending into the positioning groove (104) is arranged at the telescopic end of the quick clamp (109); the positioning groove (104) is a transverse V-shaped groove; the longitudinal support seat is a U-shaped structure with a longitudinal opening; positioning component I and positioning component III include two longitudinal support seats I (102) and two end positioning seats I (103). Positioning component II includes two longitudinal support seats I (102). The longitudinal support seats I (102) and the end positioning seats I (103) on the same longitudinal side are on the same straight line; the two end positioning seats I (103) on the same longitudinal side are arranged oppositely; positioning component II, positioning component III, the end positioning component, and the middle positioning component respectively include two longitudinally symmetrically arranged positioning cylinders. The telescopic ends of the two positioning cylinders in the same group face each other, and inner positioning seats are respectively arranged corresponding to the inner sides of each positioning cylinder; a positioning pin is arranged at the end of the piston rod of the positioning cylinder, and a positioning hole corresponding to the positioning pin is arranged on the inner positioning seat; in the same positioning component II or the middle positioning component, the two longitudinal support seats on the same longitudinal side are on both sides of the corresponding positioning pin.

2. The automated welding workstation for the lift scissors arm according to claim 1, characterized in that, the end positioning component includes a transverse support seat (204), and the transverse support seat (204) is arranged between the two longitudinal support seats. A pressing mechanism (210) corresponding to it is installed on the side of the transverse support seat (204) facing the middle positioning component; 3. The automated welding workstation for the lift scissors arm according to claim 1, characterized in that the positioning pins of positioning component III and the end positioning component are diamond pins; 4. The automated welding workstation for the lift scissors arm according to claim 1, characterized in that, on the sides of positioning component I and positioning component III facing positioning component II, and on the side of the end positioning component facing the middle positioning component, lifting seats are respectively arranged, and a lifting cylinder with a piston rod facing upwards is arranged below the lifting seat.

5. The automated welding workstation for the lift scissors arm according to claim 1, characterized in that The welding robot (41) is installed on the seat plate (42), and the seat plate (42) is movably installed on the longitudinally arranged track (5).

6. The automated welding workstation for the lift scissors arm according to claim 5, wherein A translation motor (45) is arranged on the seat plate (42). The output shaft of the translation motor (45) passes through the seat plate (42) downward and is connected with a gear. A rack (51) which is longitudinally arranged and meshes with the gear is installed on the track (5).

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