A triangular plate automatic welding device for hydraulic vehicles

Abstract

The present invention discloses an automatic welding device for a triangle plate of a hydraulic vehicle, comprising a welding table, characterized in that: two parallel limit grooves for limiting the fork legs are provided on the upper side surface of the welding table, a rotating groove connected with the limit groove is provided at one end of the welding table, abutting steps are formed in the limit groove at the other end of the welding table, an installation cavity connected with the limit groove is formed inside the welding table, a triangle plate conveying track for conveying the triangle plate is provided at one end of the welding table, a loading mechanism for loading the triangle plate is provided on the triangle plate conveying track, a fork leg conveying track for conveying the fork legs into the limit groove is provided at the other end of the welding table, a fork leg lifting mechanism is provided in the installation cavity, and a welding manipulator is provided on the outside of the welding table. The present invention provides an automatic welding device for a triangle plate of a hydraulic vehicle, which realizes automatic feeding and welding of triangle plates and fork legs, and improves welding efficiency.

Description

Technical Field

[0001] The invention relates to an automatic welding device for a triangular plate of a hydraulic vehicle. Background Art

[0002] Manual hydraulic transport trucks, commonly known as forklifts, refer to various wheeled transport vehicles for loading and unloading, stacking and short-distance transportation of palletized goods. In the production process of hydraulic vehicles, the triangle plate and the two fork legs need to be welded. To this end, the existing Chinese invention patent with publication number CN114749817A discloses "A frame welding device for an electric transport truck", including: a base plate, on which a first working plane, a second working plane, a third working plane and a column are arranged, wherein a first positioning portion is arranged on the first working plane, a second positioning portion is arranged on the second working plane, and a third positioning portion and a fourth positioning portion are arranged on the column; a first clamping assembly, a second clamping assembly, a fourth clamping assembly and a fifth clamping assembly are arranged on the base plate, and a third clamping assembly and a sixth clamping assembly are arranged on the column.

[0003] For another example, the Chinese invention patent with publication number CN114871675A discloses "A forklift fork frame welding device", which includes a clamp seat, a fork claw fixing device, a horizontal end fixing device, a fork frame root fixing device, a vertical end fixing device and a welding robot, and the welding robot is arranged on one side of the clamp seat; each fixing device corresponds to a different part of the fixed fork frame, and finally the fork frame is stably and accurately fixed at the specified position, and the fork claw fixing device can slide in the groove on the clamp seat.

[0004] However, in the existing welding device for the triangular plate of the hydraulic vehicle, the loading and positioning of the triangular plate and the fork legs need to be completed manually, the operation is still relatively cumbersome, and the welding efficiency is low. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an automatic welding device for a triangular plate of a hydraulic vehicle in view of the current status of the prior art, so as to realize automatic loading and welding of the triangular plate and the fork legs and improve the welding efficiency.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an automatic triangle plate welding device for a hydraulic vehicle, including a welding table, characterized in that: two parallel limit grooves for limiting the fork legs are opened on the upper side surface of the welding table, a rotating groove connected with the limit groove is provided at one end of the welding table, a supporting step is formed in the limit groove at the other end of the welding table, an installation cavity connected with the limit groove is formed inside the welding table, a triangle plate conveying track for conveying triangle plates is provided at one end of the welding table, a loading mechanism for loading triangle plates is provided on the triangle plate conveying track, a fork leg conveying track for conveying the fork legs into the limit groove is provided at the other end of the welding table, a fork leg lifting mechanism is provided in the installation cavity, and a welding manipulator is provided on the outside of the welding table; the loading mechanism includes The utility model comprises a rotating plate, a feeding plate, a flipping motor and a rotating motor. The rotating plate is located above the triangular plate conveying track and is rotatably arranged in the rotating groove. Extension parts are respectively formed on the two side walls at one end of the welding table. The output shaft of the flipping motor is mounted on the extension parts. A first connecting rod and a second connecting rod are respectively arranged on both sides of the rotating plate. One end of the first connecting rod is connected to the output shaft of the flipping motor, the other end of the first connecting rod is connected to one end of the second connecting rod, and the other end of the second connecting rod is connected to the outer side wall of the rotating plate. A mounting hole is opened on the rotating plate. The rotating motor is mounted on the outer end of the rotating plate. The output shaft of the rotating motor passes through the mounting hole. The feeding plate is located in the mounting hole and is connected to the output shaft of the rotating motor. A spring for pre-pressing the feeding plate downward is sleeved on the output shaft of the rotating motor. Adsorption components for adsorbing the triangular plate are respectively formed on the two side walls of the feeding plate.

[0007] As an improvement, the adsorption assembly includes a positioning column and a plurality of magnetic columns. The positioning column is used to position and support the groove on the top of the triangle plate, and the magnetic columns are electromagnetically controlled to adsorb the side walls of the triangle plate.

[0008] As a further improvement, a limiting mechanism is arranged above one end of the welding table, the limiting mechanism includes a mounting frame capable of moving up and down, a limiting roller group arranged at one end of the mounting frame, and a fork leg limiting plate arranged at the other end of the mounting frame, the limiting roller group includes a group of relatively arranged connecting rods, the lower end of the connecting rod is provided with a roller for abutting against the side wall of the triangle plate, the fork leg limiting plate is used to block and limit the two fork legs in the limiting groove, and a limiting spring is arranged between the fork leg limiting plate and the mounting frame.

[0009] As a further improvement, a discharge conveyor belt is arranged on the outer side of the welding table, and a rotating frame for placing the fork leg triangle plate welded on the welding table on the discharge conveyor belt is arranged on the side of the discharge conveyor belt, and an electromagnetic adsorption block for adsorbing the fork leg is arranged on the rotating frame.

[0010] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

[0011] Further improvement, the bottom of the welding robot is provided with an arc track, the arc track is provided with arc teeth, a moving platform is provided on the arc track, a meshing gear meshing with the arc teeth and a driving motor connected to the meshing gear are provided inside the moving platform, and the chassis of the welding robot is set on the moving platform.

[0012] Further improvement, the welding gun on the welding manipulator includes a welding needle, the welding needle has a middle through hole inside, the welding needle head forms a cone portion, a molten pool connected with the middle through hole is formed in the inner cavity of the cone portion, an abutment ring is arranged in the welding needle, a conical spring is arranged in the cone portion, the small end of the conical spring is abutted against a welding ball, the welding ball is rolled and arranged at the opening of the welding needle, a gap is formed between the welding ball and the opening edge of the welding needle, a part of the welding ball extends out of the welding needle, a pressure regulating hole is opened on the upper side wall of the welding needle, the pressure regulating hole is connected with the pressure regulator on the welding manipulator, a wire feeding mechanism is arranged on the welding manipulator, the welding wire fed from the wire feeding mechanism extends into the middle through hole, and the head of the welding wire contacts with the molten pool.

[0013] Further improvement, the welding gun on the welding manipulator includes a welding needle, the welding needle has a central through hole inside, the welding needle head forms a cone portion, a molten pool connected with the central through hole is formed in the inner cavity of the cone portion, a wire feeding mechanism is provided on the welding manipulator, the welding wire fed from the wire feeding mechanism extends into the central through hole, the head of the welding wire contacts the molten pool, a pressure regulating hole is provided on the upper side wall of the welding needle, the pressure regulating hole is connected with the pressure regulator on the welding manipulator, a welding ball is provided in the molten pool, a ring magnet is provided on the outside of the cone portion, the ring magnet drives the welding ball to approach the opening of the welding needle, the welding ball rolls and is arranged at the opening of the welding needle, a gap is formed between the welding ball and the opening edge of the welding needle, and a part of the welding ball extends out of the welding needle.

[0014] As a further improvement, the ring magnet is a permanent magnet or an electromagnetic coil controlled by electric current.

[0015] Compared with the prior art, the advantages of the present invention are: the present invention arranges the triangle plate conveying track and the fork foot conveying track on the opposite sides of the welding table respectively, firstly, the triangle plate is automatically loaded, the flip motor in the loading mechanism flips the rotating plate to the top of the triangle plate conveying track, the adsorption assembly adsorbs the triangle plate on the loading plate, the first connecting rod and the second connecting rod lift the rotating plate again, the rotating plate is in a vertical state again, the rotating motor rotates 180 degrees, so that the side of the loading plate adsorbed with the triangle plate is opposite to the welding table, then, the two fork feet enter from the limiting groove of the welding table respectively, the limiting groove plays a good limiting and guiding role for the two weldings, when the front ends of the two fork feet are respectively against the side walls of the rotating plate, the fork foot conveying is completed, then, the fork foot lifting mechanism synchronously lifts the two fork feet a slight distance, the spring on the rotating plate is squeezed, to ensure that the upper side surfaces of the two fork feet and the lower side surface of the triangle plate are squeezed and contacted with each other, then, the welding robot welds the gap between the fork feet and the triangle plate, thereby realizing the automatic loading and welding of the triangle plate and the fork feet, and improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure after the triangle plate and the fork legs are welded in an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 Side view of

[0018] Figure 3 yes Figure 1 Left view of

[0019] Figure 4 It is a structural schematic diagram of a triangular plate automatic welding device for a hydraulic vehicle in an embodiment of the present invention;

[0020] Figure 5 yes Figure 4 Structural schematic diagram of the middle fork leg lifting mechanism;

[0021] Figure 6 yes Figure 5 Schematic diagram of the connection structure of the rotating block;

[0022] Figure 7 yes Figure 4 Cross-sectional view of the middle welding station at AA;

[0023] Figure 8 yes Figure 7 Sectional view at the middle BB;

[0024] Fig. 9 is a schematic diagram of the structure inside the welding pin in an embodiment of the present invention;

[0025] Fig.10 is another schematic diagram of the structure inside the welding pin in an embodiment of the present invention;

[0026] Fig.11 It is a schematic diagram of an automatic welding method for a triangular plate of a hydraulic vehicle in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings.

[0028] like Figures 1 to 11 As shown, the automatic triangle plate welding device of the hydraulic vehicle in this embodiment includes a welding table 2, a triangle plate conveying track 5, a fork foot conveying track, a discharge conveyor belt, a rotating frame, a loading mechanism 3, a welding manipulator, a fork foot lifting mechanism 4, and a limiting mechanism.

[0029] Among them, two parallel limit grooves 21 for limiting the fork legs 11 are opened on the upper side surface of the welding table 2, a rotating groove 22 connected with the limit groove 21 is provided at one end of the welding table 2, a supporting step 211 is formed in the limit groove 21 at the other end of the welding table 2, and an installation cavity 24 connected with the limit groove 22 is formed inside the welding table 2, a triangle plate conveying track 5 for conveying the triangle plate 12 is provided at one end of the welding table 2, a loading mechanism 3 for loading and unloading the triangle plate 12 is provided on the triangle plate conveying track 5, a fork leg conveying track for conveying the fork legs 11 into the limit groove 21 is provided at the other end of the welding table 2, a fork leg lifting mechanism 4 is provided in the installation cavity 24, and a welding manipulator is provided on the outside of the welding table 2; the loading mechanism 3 includes a rotating plate 31, a loading plate 32, a flip motor and a rotating motor 34, and the rotating plate 31 is located at the triangle plate conveying track 5 The top is rotatably arranged in the rotating groove 22, and extension parts 23 are respectively formed on the two side walls at one end of the welding table 2. The output shaft of the flipping motor is mounted on the extension part 23. The first connecting rod 331 and the second connecting rod 332 are respectively arranged on both sides of the rotating plate 31. One end of the first connecting rod 331 is connected to the output shaft of the flipping motor, the other end of the first connecting rod 331 is connected to one end of the second connecting rod 332, and the other end of the second connecting rod 332 is connected to the outer wall of the rotating plate 31. A mounting hole 311 is opened on the rotating plate 31. The rotating motor 34 is mounted on the outer end of the rotating plate 31, and the output shaft of the rotating motor 34 passes through the mounting hole 311. The loading plate 32 is located in the mounting hole 311 and is connected to the output shaft of the rotating motor 34. A spring 35 for pre-pressing the loading plate 32 downward is sleeved on the output shaft of the rotating motor 34, and adsorption components for adsorbing the triangular plate 12 are respectively formed on the two side walls of the loading plate 32.

[0030] Furthermore, in order to improve the positioning effect of the triangle plate 12 and the fork leg 11, a limiting mechanism is arranged above one end of the welding table 2, and the limiting mechanism includes a mounting frame capable of moving up and down, a limiting roller group arranged at one end of the mounting frame, and a fork leg limiting plate arranged at the other end of the mounting frame. The limiting roller group includes a group of relatively arranged connecting rods, and the lower end of the connecting rod is provided with a roller for abutting against the side wall of the triangle plate 12. The fork leg limiting plate is used to block and limit the two fork legs 11 in the limiting groove, and a limiting spring is arranged between the fork leg limiting plate and the mounting frame.

[0031] Meanwhile, in the embodiment of the present invention, the adsorption component includes a positioning column 321 and a plurality of magnetic columns 322. The positioning column 321 is used to position and support the groove 121 at the top of the triangle plate 12, and the magnetic columns 322 are electromagnetically controlled to adsorb the side walls of the triangle plate 12. Among them, the positioning column 321 positions the top of the triangle plate 12, and the magnetic columns 322 are controlled by electric current. After power is obtained, the magnetic columns 322 have magnetic force to adsorb the triangle plate 12. After power is lost, the magnetic columns 322 lose their adsorption effect on the triangle plate 12, and the magnetic columns 322 adsorb the side walls of the triangle plate 12. The triangle plate 12 is positioned and adsorbed in the vertical plane formed by the magnetic columns 322.

[0032] During the assembly of the triangle plate 12 and the fork leg 11, the triangle plate 12 is erected, and after the fork leg 11 is inserted into place, the mounting frame moves downward for a distance, and the two rollers act on the inclined surfaces on both sides of the triangle plate 12, respectively, so that the triangle plate 12 is slightly deflected in the vertical plane formed by the magnetic column 322 with the positioning column 321 as the center, so that the position of the triangle plate 12 is corrected. Afterwards, with the action of the fork leg lifting mechanism 4, when the fork leg 11 is lifted, one end of the fork leg 11 is blocked by the triangle plate 12, and the other end of the fork leg 11 is limited by the fork leg limit plate, so that the forces at both ends of the fork leg 11 are balanced.

[0033] Furthermore, in order to facilitate the unloading of the triangle plate 12 and the fork leg 11 after welding, a unloading conveyor belt is provided on the outside of the welding table 2, and a rotating frame for placing the fork leg triangle plate welded on the welding table 2 on the unloading conveyor belt is provided on the side of the unloading conveyor belt, and an electromagnetic adsorption block for adsorbing the fork leg is provided on the rotating frame. After the welding and assembly of the triangle plate and the fork leg is completed, the rotating frame is rotated to the welding table, and the electromagnetic adsorption block can adsorb the fork leg and connect it to the triangle plate for removal, and then transfer it to the unloading conveyor belt.

[0034] In addition, if Figure 5 and 6As shown, the fork foot lifting mechanism 4 includes a sliding frame, a lifting cylinder 42, a rotating block 43, a fixed block 49, two guide rails 47, a lifting plate 44 and two lifting blocks 45. The two guide rails 47 are arranged opposite to each other and vertically fixed in the installation cavity 24. The sliding frame has two sliding rods 41, one end of the sliding rod 41 is slidably set on the corresponding guide rails 47, and a connecting rod 48 is set between one end of the two sliding rods 41. The lifting cylinder 42 is located between the two sliding rods 41, one end of the lifting cylinder 42 is hinged to the bottom of the installation cavity 24, and the other end of the lifting cylinder 42 and the rotating block 43 is hinged, the bottom of both sides of the rotating block 43 are respectively hinged on the fixed block 49, and the upper part of both sides of the rotating block 43 is rotatably provided with rollers 46, and guide grooves 411 are respectively formed on the inner side surface of the other end of the sliding rod 41, and the roller 46 is limited in the guide groove 411, and a braking surface 491 is formed on the fixed block 49, and an abutting surface for contacting with the braking surface 491 is formed on the rotating block 43. The lifting plate 44 is fixed to the upper part of the two sliding rods 41, and the lifting block 45 is relatively arranged on the upper side surface of the lifting plate 44 for inserting into the corresponding limiting groove 21 on the welding table 2.

[0035] During the lifting process of the fork leg 11, the piston rod of the lifting cylinder 42 extends out, pushing the rotating block 43 to rotate, and the rollers 46 on both sides of the rotating block 43 move in the guide groove 411 of the sliding rod, pushing the two sliding rods 41 to slide upward along the guide rail 47, so that the two lifting blocks 45 on the lifting plate 44 respectively lift the corresponding fork leg 11. At the same time, when the abutment surface on the rotating block 42 contacts the braking surface 491 on the fixed block 49, the sliding rod 41 cannot move upward or downward, and the lifting block 45 is in a locked state. It can only be unlocked when the piston rod of the lifting cylinder 42 is retracted, so that the fork leg 11 and the triangle plate 12 are in a more stable state during the welding process.

[0036] In addition, there can be two welding manipulators, which are respectively arranged on both sides of the welding table 2. At the same time, an arc track can be arranged at the bottom of the welding manipulator, arc teeth are arranged on the arc track, a mobile platform is arranged on the arc track, a meshing gear meshing with the arc teeth and a driving motor connected to the meshing gear are arranged inside the mobile platform, and the chassis of the welding manipulator is arranged on the mobile platform. By setting the arc track, the position movement of the welding manipulator is realized, and the motion range of the welding manipulator is improved, so that the welding manipulator can weld the welding gaps in two different directions on the triangle plate and the fork foot.

[0037] In addition, in the embodiment of the present invention, the welding gun on the welding manipulator is also improved. Specifically, Fig. 9As shown, the welding gun on the welding manipulator includes a welding needle 6, which has a middle through hole 601 inside. The head of the welding needle 6 forms a cone portion 602, and a molten pool 61 connected with the middle through hole 601 is formed in the inner cavity of the cone portion 602. A supporting ring 64 is arranged in the welding needle 6, and a conical spring 63 is arranged in the cone portion 602. The small end of the conical spring 63 is abutted against a welding ball 62, and the welding ball 62 is rolled and arranged at the opening of the welding needle 6. A gap is formed between the welding ball 62 and the opening edge of the welding needle 6, and a part of the welding ball 62 extends out of the welding needle 6. A pressure regulating hole 65 is opened on the upper side wall of the welding needle 6, and the pressure regulating hole 65 is connected to the pressure regulator on the welding manipulator. A wire feeding mechanism is arranged on the welding manipulator, and the welding wire sent out from the wire feeding mechanism extends into the middle through hole 601, and the head of the welding wire contacts the molten pool 61.

[0038] When the welding gun moves with the welding manipulator, the welding wire, under the action of the wire feeding mechanism, continuously replenishes the molten welding liquid in the molten pool 61 to ensure that the welding liquid in the molten pool 61 is maintained at a certain amount. At the same time, the welding ball 62 rolls along the welding gap, and the conical spring 63 in the cone portion 602 is squeezed, thereby enlarging the gap between the welding ball 62 and the opening edge of the welding needle 6, so that the welding liquid can be filled into the welding gap along the outer wall of the welding ball 62. At the same time, due to the action of the conical spring 63, the welding ball 62 can always be in contact with the opening edge. As long as the welding liquid reserve in the welding needle 6 is increased to ensure that there is always sufficient welding liquid in the molten pool 61, the welding gun can be tilted to different degrees to adapt to the direction of different welds.

[0039] Or, further, it is also possible to adopt Fig.10 The structure of the welding manipulator is as follows. Specifically, the welding gun on the welding manipulator includes a welding needle 6, the welding needle 6 has a middle through hole 601 inside, the head of the welding needle 6 forms a cone part 602, and a molten pool 61 connected with the middle through hole 601 is formed in the inner cavity of the cone part 602. The welding manipulator is provided with a wire feeding mechanism, and the welding wire sent out from the wire feeding mechanism extends into the middle through hole 601, and the head of the welding wire contacts the molten pool 61. A pressure regulating hole 65 is provided on the upper side wall of the welding needle 6, and the pressure regulating hole 65 is connected with the pressure regulator on the welding manipulator. A welding ball 62 is arranged in the molten pool 61, and a ring magnet 67 is sleeved on the outside of the cone part 602. The ring magnet 67 drives the welding ball 62 to approach the opening of the welding needle 6, and the welding ball 62 is rolled and arranged at the opening of the welding needle 6. A gap is formed between the welding ball 62 and the opening edge of the welding needle 6, and a part of the welding ball 62 extends out of the welding needle 6. At the same time, the ring magnet 67 is a permanent magnet or an electromagnetic coil controlled by current.

[0040] Fig.10 Public solder pin structure and Fig. 9The difference of the disclosed solder needle structure is that a magnetic field is used to control the solder ball 62 to always fit the opening and the solder liquid to always fill the molten pool 61, and no matter how the posture of the welding gun changes, it will not affect the welding.

[0041] Finally, if Fig.11 As shown, the present invention also discloses an automatic welding method for a triangular plate of a hydraulic vehicle, comprising the following steps:

[0042] Step S1, the triangle plate 12 is loaded, the triangle plate conveying track 5 conveys the triangle plate 12 to one end of the welding table 2 and positions it, the flip motor in the loading mechanism 3 turns down the rotating plate 31 through the first connecting rod 331 and the second connecting rod 332, and the rotating plate 31 is located above the triangle plate conveying track 5, and the magnetic suction column 322 on the loading plate 32 adsorbs the triangle plate 12 on the loading plate 32. At the same time, the positioning column 321 on the loading plate 32 is inserted into the groove 121 at the top of the triangle plate 12, and the flip motor rotates in the opposite direction, and the rotating plate 31 is in a vertical state again, and the rotating motor 34 rotates 180 degrees, so that the side of the loading plate 32 adsorbed with the triangle plate 12 is opposite to the welding table 2;

[0043] Step S2, the fork legs 11 are loaded, and the fork leg conveying track synchronously delivers the two fork legs 11 into the two limiting grooves 21 of the welding table 2 until the front ends of the two fork legs 11 respectively abut against the side walls of the rotating plate 31;

[0044] Step S3, the triangle plate 12 and the fork leg 11 are pressed together, the mounting frame moves downward for a distance, and the two rollers act on the inclined surfaces on both sides of the triangle plate 12 respectively, so that the triangle plate 12 is slightly deflected in the vertical plane formed by the magnetic column 322 with the positioning column 321 as the center, so that the position of the triangle plate 12 is corrected, and then the piston rod of the lifting cylinder 42 is extended to push the rotating block 43 to rotate, and the rollers 46 on both sides of the rotating block 43 move in the guide groove 411 of the sliding rod 41, pushing the two sliding rods 41 to slide upward along the guide rail 47, so that the lifting cylinder 42 is lifted. The two lifting blocks 45 on the plate 44 respectively lift the corresponding fork legs 11, one end of the fork legs 11 is blocked by the triangular plate 12, and the other end of the fork legs 11 is limited by the fork leg limiting plate, so that the two ends of the fork legs 11 are balanced and lifted upward. When the abutting surface on the rotating block 43 contacts the braking surface 491 on the fixed block 49, the sliding rod 41 cannot move upward or downward, the lifting block 45 is in a locked state, the spring 35 on the rotating plate 31 is compressed for a distance, and the triangular plate 12 and the fork legs 11 are in a mutually pressed and locked state.

[0045] Step S4, welding the triangle plate 12 and the fork leg 11, and the welding manipulators on both sides weld the welds on the triangle plate 12 and the fork leg 11 respectively;

[0046] Step S5, the triangle plate 12 and the fork leg 11 are unloaded, the mounting frame is reset upward, the rotating frame is rotated to the welding table 2, the electromagnetic adsorption block can adsorb the fork leg 11, and connect it to the triangle plate 12 to take it out, and then transfer it to the unloading conveyor belt.

[0047] In summary, the present invention arranges the triangle plate conveying track 5 and the fork foot conveying track on the opposite sides of the welding table 2, respectively. First, the triangle plate 12 is automatically loaded. The flip motor in the loading mechanism 3 flips the rotating plate to the top of the triangle plate conveying track 5. The adsorption component adsorbs the triangle plate 12 on the loading plate 32. The first connecting rod 331 and the second connecting rod 332 lift the rotating plate 31, and the rotating plate 31 is in a vertical state again. The rotating motor 34 rotates 180 degrees, so that the side of the loading plate 32 adsorbed with the triangle plate 12 is opposite to the welding table 2. Then, the two fork feet 11 are respectively moved from the limit of the welding table 2. The groove 21 enters, and the limiting groove 21 plays a good limiting and guiding role in the two weldings. When the front ends of the two fork legs 11 are respectively against the side walls of the rotating plate 31, the fork legs 11 are conveyed. Then, the fork leg lifting mechanism 4 synchronously lifts the two fork legs 11 a slight distance, and the spring 35 on the rotating plate 31 is squeezed to ensure that the upper side surfaces of the two fork legs 11 and the lower side surfaces of the triangular plate 12 are squeezed and contacted with each other. After that, the welding robot welds the gap between the fork legs 11 and the triangular plate 12, thereby realizing the automatic loading and welding of the triangular plate 12 and the fork legs 11 and improving the welding efficiency.

Claims

1. An automatic welding device for a triangular plate of a hydraulic vehicle, comprising a welding table (2), characterized in that: The upper side surface of the welding platform (2) is provided with two parallel limiting grooves (21) for limiting the fork legs (11); a rotating groove (22) is connected to the limiting groove (21) at one end of the welding platform (2); a supporting step (211) is formed in the limiting groove (21) at the other end of the welding platform (2); a mounting cavity (24) is formed inside the welding platform (2) and is connected to the limiting groove (21); a triangle plate conveying track (5) for conveying the triangle plate (12) is provided at one end of the welding platform (2); and a rotating groove (22) is formed at the other end of the welding platform (2) and is connected to the limiting groove (21). A loading mechanism (3) for loading and unloading a triangle plate (12) is arranged on the angle plate conveying track (5); a fork foot conveying track for conveying the fork foot (11) to the limiting groove (21) is arranged at the other end of the welding table (2); a fork foot lifting mechanism (4) is arranged in the installation cavity (24); and a welding manipulator is arranged outside the welding table (2); the loading mechanism (3) comprises a rotating plate (31), a loading plate (32), a flip motor and a rotating motor (34); the rotating plate (31) is located on the triangle plate conveying track ( 5) and is rotatably arranged in the rotating groove (22), an extension portion (23) is formed on both side walls of one end of the welding table (2), an output shaft of the turning motor is mounted on the extension portion (23), and a first connecting rod (331) and a second connecting rod (332) are respectively arranged on both sides of the turning plate (31), one end of the first connecting rod (331) is connected to the output shaft of the turning motor, the other end of the first connecting rod (331) is connected to one end of the second connecting rod (332), and the other end of the second connecting rod (332) is connected to the outer wall of the turning plate (31). A mounting hole (311) is provided on the rotating plate (31), a rotating motor (34) is mounted on the outer end of the rotating plate (31), an output shaft of the rotating motor (34) passes through the mounting hole (311), a loading plate (32) is located in the mounting hole (311) and is connected to the output shaft of the rotating motor (34), a spring (35) for pre-pressing the loading plate (32) downward is sleeved on the output shaft of the rotating motor (34), and adsorption components for adsorbing the triangular plate (12) are respectively formed on the two side walls of the loading plate (32).

2. The automatic welding device for the triangular plate of a hydraulic vehicle according to claim 1 is characterized in that: The adsorption assembly comprises a positioning column (321) and a plurality of magnetic columns (322), wherein the positioning column (321) is used to position and support the groove (121) at the top of the triangle plate (12), and the magnetic columns (322) are electromagnetically controlled to adsorb the side walls of the triangle plate (12).

3. The automatic welding device for the triangular plate of a hydraulic vehicle according to claim 1 is characterized in that: A limiting mechanism is arranged above one end of the welding table (2), the limiting mechanism comprising a mounting frame capable of moving up and down, a limiting roller group arranged at one end of the mounting frame, and a fork foot limiting plate arranged at the other end of the mounting frame, the limiting roller group comprising a group of relatively arranged connecting rods, the lower ends of the connecting rods being provided with rollers for abutting against the side walls of the triangular plate (12), the fork foot limiting plate being used to block and limit the two fork feet (11) in the limiting groove, and a limiting spring being arranged between the fork foot limiting plate and the mounting frame.

4. The automatic welding device for the triangular plate of a hydraulic vehicle according to claim 1, characterized in that: A discharge conveyor belt is arranged outside the welding table (2), and a rotating frame for placing the fork leg triangle plate welded on the welding table (2) on the discharge conveyor belt is arranged on the side of the discharge conveyor belt, and an electromagnetic adsorption block for adsorbing the fork leg is arranged on the rotating frame.

5. The automatic welding device for the triangular plate of a hydraulic vehicle according to claim 1, characterized in that: The fork foot lifting mechanism (4) comprises a sliding frame, a lifting cylinder (42), a rotating block (43), a fixed block (49), two guide rails (47), a lifting plate (44) and two lifting blocks (45). The two guide rails (47) are arranged opposite to each other and are vertically fixed in the installation cavity (24). The sliding frame has two sliding rods (41). One end of the sliding rods (41) is respectively slidably arranged on the corresponding guide rails (47). A connecting rod (48) is arranged between one end of the two sliding rods (41). The lifting cylinder (42) is located between the two sliding rods (41). One end of the lifting cylinder (42) is hinged to the bottom of the installation cavity (24). The other end of the lifting cylinder (42) and the rotating block (43) are connected to each other. 43), the bottoms of both sides of the rotating block (43) are respectively hinged on the fixed block (49), the upper parts of both sides of the rotating block (43) are respectively rotatably provided with rollers (46), the inner side surfaces of the other ends of the sliding rods (41) are respectively formed with guide grooves (411), the rollers (46) are limited in the guide grooves (411), the fixed block (49) is formed with a braking surface (491), the rotating block (43) is formed with a supporting surface for contacting with the braking surface (491), the lifting plate (44) is fixed to the upper parts of the two sliding rods (41), and the lifting block (45) is relatively arranged on the upper side surface of the lifting plate (44) for inserting into the corresponding limiting grooves (21) on the welding table (2).

6. The automatic welding device for the triangular plate of a hydraulic vehicle according to claim 1, characterized in that: The bottom of the welding robot is provided with an arc track, the arc track is provided with arc teeth, a moving platform is provided on the arc track, a meshing gear meshing with the arc teeth and a driving motor connected to the meshing gear are provided inside the moving platform, and the chassis of the welding robot is arranged on the moving platform.

7. The automatic welding device for the triangular plate of a hydraulic vehicle according to claim 6, characterized in that: The welding gun on the welding manipulator comprises a welding needle (6), the welding needle (6) has a central through hole (601) inside, the head of the welding needle (6) forms a cone portion (602), a molten pool (61) connected to the central through hole (601) is formed in the inner cavity of the cone portion (602), abutting ring (64) is arranged in the welding needle (6), a conical spring (63) is arranged in the cone portion (602), the small end of the conical spring (63) is against a welding ball (62), and the welding ball (62) rolls A pressure regulating hole (65) is provided on the upper side wall of the welding needle (6), and the pressure regulating hole (65) is connected to a pressure regulator on a welding manipulator. A wire feeding mechanism is provided on the welding manipulator, and the welding wire fed from the wire feeding mechanism extends into the middle through hole (601), and the head of the welding wire contacts the molten pool (61).

8. The automatic welding device for the triangular plate of a hydraulic vehicle according to claim 6, characterized in that: The welding gun on the welding manipulator comprises a welding needle (6), the welding needle (6) has a central through hole (601) inside, the head of the welding needle (6) forms a cone portion (602), and a molten pool (61) connected to the central through hole (601) is formed in the inner cavity of the cone portion (602). The welding manipulator is provided with a wire feeding mechanism, and the welding wire fed by the wire feeding mechanism extends into the central through hole (601), and the head of the welding wire contacts the molten pool (61). A pressure regulating hole (61) is provided on the upper side wall of the welding needle (6). 65), the pressure regulating hole (65) is connected to the pressure regulator on the welding robot, a solder ball (62) is arranged in the molten pool (61), a ring magnet (67) is sleeved on the outside of the cone portion (602), the ring magnet (67) drives the solder ball (62) to move closer to the opening of the solder needle (6), the solder ball (62) is rolled and arranged at the opening of the solder needle (6), a gap is formed between the solder ball (62) and the opening edge of the solder needle (6), and a part of the solder ball (62) extends out of the solder needle (6).

9. The automatic welding device for the triangular plate of a hydraulic vehicle according to claim 8, characterized in that: The ring magnet (67) is a permanent magnet or an electromagnetic coil controlled by electric current.

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