A workpiece automatic welding device

Abstract

The present invention discloses an automatic welding device for workpieces, and relates to the technical field of workpiece welding. The present invention includes a welding robot arm, a positioner and a base, wherein the welding robot arm and the positioner are both arranged on the top of the base, and the positioner includes a left support seat, a left pallet, a right support seat and a right pallet. The present invention connects the driving mechanism of the rotary reversing assembly with the lifting mechanism, so that the rotation of the driving mechanism drives the lifting mechanism to operate, controls the top seat to drive the right pallet to move up and down, adjusts the height position of the right pallet, disconnects the driving mechanism from the lifting mechanism, so that the rotation of the driving mechanism drives the right support seat to rotate on the base, adjusts the horizontal position of the right pallet, thereby controlling the workpiece fixing platform on the top of the right pallet to separate from the angle adjustment component, moves it to the conveyor belt of the production line, receives the workpiece to be welded, and drives it to return to its original position to perform welding work.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece welding, and in particular to an automatic workpiece welding device. Background Art

[0002] During the workpiece processing, a combination of a welding robot and a positioner will be used. The positioner will be used to fix and clamp the workpiece, drive it to flip and adjust its direction, and drive the welding robot at the same time, so as to achieve welding in all directions of the workpiece.

[0003] The existing positioner relies on supports on both sides to support the workbench in the middle. The supports drive the workbench to flip along the Y-axis, and the workbench drives the workpiece on it to rotate along the Z-axis, so that the workpiece reaches the required welding angle, but the workpiece needs to be moved to the positioner manually or by driving other robotic arms. The positioner cannot take the workpiece on the production line by itself, but can only clamp and fix the workpiece placed on it, and rely on multiple sets of rotating parts inside it to drive the workpiece to rotate and adjust along various axes, so that the welding part faces the welding arm, and cooperates with it to perform welding work, which is inconvenient to use. Summary of the invention

[0004] In order to solve the above-mentioned problem, the present invention provides a workpiece automatic welding device to solve the problem that the positioner cannot automatically move the workpiece onto it for welding.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A workpiece automatic welding device comprises a welding mechanical arm, a positioner and a base, wherein the welding mechanical arm and the positioner are both arranged on the top of the base, and the positioner comprises a left supporting seat, a left supporting plate, a right supporting seat and a right supporting plate;

[0007] The left support seat is fixedly mounted on the top of the base, a rotating mechanism is arranged inside the left support seat, and an output end thereof is connected to one side of the left support plate, an inclined surface is arranged on the other side of the left support plate, and an angle adjustment component is arranged at the bottom of the inclined surface of the left support plate;

[0008] The right support seat is rotatably mounted on the top of the base, one side of the right support plate is rotatably connected to the right support seat, the other side of the right support plate is provided with an inclined surface, the inclined surface at the right support plate is corresponding to the inclined surface at the left support plate, and a workpiece fixing table is fixedly mounted on the top of the inclined surface of the right support plate, a rotation reversing component is provided inside the right support seat, a first limit component for limiting the rotation of the workpiece fixing table is provided inside the workpiece fixing table, and a second limit component for limiting the rotation of the right support plate is provided inside the right support plate;

[0009] The right support seat includes a sliding sleeve, a top seat and a rotating base frame, the sliding sleeve includes an outer sleeve and an inner sleeve that are slidably connected, the top seat is fixedly installed on the top of the inner sleeve, the rotating base frame is rotatably installed on the top of the base, and the rotating base frame is fixedly connected to the outer sleeve;

[0010] The workpiece fixing platform comprises an outer ring sleeve, an inner turntable and a support plate, wherein the outer ring sleeve is fixedly mounted on the top of the right support plate, the inner turntable is rotatably mounted inside the outer ring sleeve, and the support plate is fixedly mounted on the top of the inner turntable;

[0011] The rotary reversing assembly comprises a driving mechanism and a lifting mechanism. The driving mechanism is fixedly mounted on the top of the base, and the lifting mechanism is fixedly mounted inside the right supporting seat. The driving mechanism and the lifting mechanism are detachably connected.

[0012] Further, the angle adjustment component includes a motor box, a first motor, a rotating seat and a limiting boss, the motor box is fixedly installed at the bottom of the left support plate, the first motor is arranged inside the motor box, the output end of the first motor is fixedly connected to the rotating seat, and the rotating seat is rotatably installed on the top of the left support plate, and the limiting boss is fixedly installed on the top of the rotating seat;

[0013] The number of the limiting bosses is multiple groups, and the multiple groups of limiting bosses are arranged in a circular array on the top of the rotating seat.

[0014] Furthermore, the right support seat also includes a U-shaped plug plate and a first spring. A groove is opened on the surface of the rotating base frame, and the U-shaped plug plate is slidably installed inside the groove. The first spring is fixedly installed inside the groove, and the first spring is connected to the U-shaped plug plate.

[0015] Furthermore, mechanical claws are provided on the top of the supporting plate, and the number of the mechanical claws is multiple groups and arranged in an array.

[0016] Further, the driving mechanism includes a second motor, a rotating tray, a slide groove and a limit sliding member, the second motor is fixedly installed on the top of the base and located inside the right support seat, the output end of the second motor is fixedly installed with a rotating tray, the interior of the rotating tray is provided with a slide groove, and the interior of the slide groove is slidably installed with a limit sliding member;

[0017] There are multiple groups of slide grooves, and the multiple groups of slide grooves are arranged in a circular array. The limiting sliding member includes a rod body, a baffle and an arc plate. The baffle is fixedly installed on the surface of the rod body, and the arc plate is fixedly installed on one end of the rod body away from the axis of the rotating tray.

[0018] Furthermore, the lifting mechanism includes a limit sleeve, a screw, a conversion connecting rod, an electromagnet and a supporting slide plate. The limit sleeve is fixedly installed inside the outer sleeve of the sliding sleeve, the limit sleeve is rotatably installed inside the limit sleeve, the conversion connecting rod is slidably inserted inside the screw, an adsorption block is fixedly installed on the top of the conversion connecting rod, a connecting plate is fixedly installed on the surface of the limit sleeve, and an electromagnet is provided on the top of the connecting plate, the electromagnet is located above the adsorption block of the conversion connecting rod, a supporting slide plate is threadedly installed on the surface of the screw, the supporting slide plate is in contact with the inner wall of the limit sleeve, and the top of the support slide plate is fixedly connected to the inner top of the top seat.

[0019] Furthermore, the first limiting assembly includes a pressure plate, a push plate, a connecting rod, a pulley, a limit latch and a second spring. A first cavity is opened inside the inner turntable. The pressure plate is rotatably installed inside the first cavity. The upper end of the pressure plate is bent toward the inside of the inner turntable. The limit latch is slidably inserted inside the first cavity. One end of the limit latch is fixedly installed with a push plate. The two ends of the connecting rod are respectively rotatably connected to the lower end of the pressure plate and the push plate. Pulleys are provided on the upper and lower sides of the push plate, and the pulleys are in contact with the inner wall of the first cavity. The surface of the limit latch is fixedly connected with the second spring, and the second spring is connected to the inside of the first cavity.

[0020] Furthermore, there are multiple groups of the first limit assemblies, which are arranged in a circular array inside the inner turntable, and the top of the angle adjustment component is slidably connected to the first limit assemblies.

[0021] Furthermore, the second limit assembly includes a trapezoidal push block, a third spring, an upper rack, a transmission gear, a lower rack and a limit plug rod. A second cavity is opened inside the right supporting plate. The trapezoidal push block is slidably installed inside the second cavity. A third spring is fixedly installed on one side of the trapezoidal push block, and the third spring is connected to the inner wall of the second cavity. The upper rack is slidably installed inside the second cavity, and the upper rack is fixedly connected to the trapezoidal push block. The transmission gear is rotatably installed inside the second cavity, and the lower rack is slidably installed inside the second cavity. The limit plug rod is slidably plugged into the inside of the right supporting plate, and the lower rack is fixedly connected to the limit plug rod.

[0022] The transmission gear is located between the upper rack and the lower rack, and is meshedly connected with the two racks.

[0023] Furthermore, the number of the upper rack, transmission gear, lower rack and limiting rod is two groups, and the two groups of upper rack, transmission gear, lower rack and limiting rod are symmetrically arranged inside the right support plate.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention connects the driving mechanism of the rotary reversing component with the lifting mechanism, so that the rotation of the driving mechanism drives the lifting mechanism to operate, controls the top seat to drive the right support plate to move up and down, adjusts the height position of the right support plate, disconnects the driving mechanism from the lifting mechanism, so that the rotation of the driving mechanism drives the right support seat to rotate on the base, adjusts the horizontal position of the right support plate, thereby controlling the workpiece fixing platform on the top of the right support plate to separate from the angle adjustment component, moves it to the conveyor belt of the production line, receives the workpiece to be welded, and drives it to return to its original position to perform welding work.

[0026] The present invention controls the rotation of the inner turntable in the outer ring sleeve by contracting and pushing out the first limit assembly inside the inner turntable. When the workpiece fixing table moves up and away from the angle adjustment component as the right support plate moves up, the first limit assembly is pushed out from the inside of the inner turntable and inserted into the outer ring sleeve, thereby limiting the rotation of the support plate when receiving the workpiece and preventing the workpiece from rotating randomly and falling off.

[0027] The present invention controls the rotation of the right pallet on one side of the right supporting seat by horizontally sliding the second limit assembly inside the right pallet. In the process of the right pallet moving up and separating from the left pallet, the restriction of one end of the second limit assembly by the angle adjustment component is released, so that the two ends of the second limit assembly are pushed out from the inside of the right pallet, and the other end of the second limit assembly is inserted into the right supporting seat, thereby limiting the rotation of the right pallet when receiving the workpiece, thereby preventing the workpiece from flipping over and falling.

[0028] The present invention controls the right supporting seat to move up and down by rotating the reversing component, so that the right support plate is separated from the left support plate, and the workpiece fixing platform is separated from the angle adjustment component. When the components are separated, the first limit component and the second limit component are triggered to shrink and move. When the connection between the left and right parts of the positioner is released, the rotatable and flippable workpiece fixing platform and the right support plate are quickly limited to ensure stable workpiece picking and placing. When the left and right parts of the positioner are connected again, the limit can be quickly released to continue the subsequent workpiece angle adjustment and welding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention from a first viewing angle;

[0030] Figure 2 is a schematic diagram of a three-dimensional structure from a second viewing angle of the present invention;

[0031] Figure 3 It is a schematic diagram of the splitting of the present invention;

[0032] Figure 4 is a first partial cross-sectional schematic diagram of the present invention;

[0033] Figure 5 yes Figure 4A magnified schematic diagram of the middle part;

[0034] Figure 6 yes Figure 4 The enlarged schematic diagram of the middle B part;

[0035] Figure 7 is a second partial cross-sectional schematic diagram of the present invention;

[0036] Figure 8 is a third partial cross-sectional schematic diagram of the present invention;

[0037] Fig. 9 yes Figure 8 Enlarged schematic diagram of middle C part;

[0038] Fig.10 yes Figure 8 Enlarged schematic diagram of part D in the middle.

[0039] Figure numerals: 1, welding robot arm; 2, left support seat; 3, left support plate; 4, angle adjustment component; 401, motor box; 402, first motor; 403, rotating seat; 404, limiting boss; 5, right support seat; 501, sliding sleeve; 502, top seat; 503, rotating base; 504, U-shaped plug plate; 505, first spring; 6, right support plate; 7, workpiece fixing table; 701, outer ring sleeve; 702, inner turntable; 703, support plate; 8, rotation reversing assembly; 801, limiting sleeve plate; 802, screw; 803 , conversion connecting rod; 804, electromagnet; 805, supporting slide plate; 806, second motor; 807, rotating tray; 808, slide groove; 809, limiting sliding member; 9, first limiting assembly; 901, pressure plate; 902, pushing plate; 903, connecting rod; 904, pulley; 905, limiting latch; 906, second spring; 10, second limiting assembly; 1001, trapezoidal push block; 1002, third spring; 1003, upper rack; 1004, transmission gear; 1005, lower rack; 1006, limiting plug rod. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement schemes or common means, they are no longer described in detail herein, but still belong to the scope of protection of the present application.

[0041] Figure 1-Figure 10 The best embodiment of the present invention is shown below in conjunction with the attached Figure 1-Figure 10 The present invention is further described.

[0042] See attached Figure 1-Figure 10A workpiece automatic welding device comprises a welding robot arm 1, a positioner and a base, wherein the welding robot arm 1 and the positioner are both arranged at the top of the base, and the positioner comprises a left support seat 2, a left pallet 3, a right support seat 5 and a right pallet 6. The left support seat 2 is fixedly mounted on the top of the base, a rotating mechanism is provided inside the left support seat 2, and its output end is connected to one side of the left pallet 3, an inclined surface is provided on the other side of the left pallet 3, and an angle adjustment component 4 is provided at the bottom of the other side of the left pallet 3, the right support seat 5 is rotatably mounted on the top of the base, one side of the right pallet 6 is rotatably connected to the right support seat 5, an inclined surface is provided on the other side of the right pallet 6, the inclined surface at the right pallet 6 is corresponding to the inclined surface at the left pallet 3, and a workpiece fixing table 7 is fixedly mounted on the top of the other side of the right pallet 6, a rotation reversing component 8 is provided inside the right support seat 5, a first limiting component 9 for limiting the rotation of the workpiece fixing table 7 is provided inside the workpiece fixing table 7, and a second limiting component 10 for limiting the rotation of the right pallet 6 is provided inside the right pallet 6. In this embodiment, the right supporting plate 6 can rotate at an angle of 0-90° or 0-180°.

[0043] The right support seat 5 includes a sliding sleeve 501, a top seat 502 and a rotating base frame 503. The sliding sleeve 501 includes an outer sleeve and an inner sleeve. The lower part of the inner sleeve can be slidably extended into the outer sleeve. The top seat 502 is fixedly installed on the top of the inner sleeve. The rotating base frame 503 is rotatably installed on the top of the base, and the rotating base frame 503 is fixedly connected to the bottom of the outer sleeve.

[0044] The workpiece fixing table 7 includes an outer ring sleeve 701, an inner turntable 702 and a supporting plate 703. The outer ring sleeve 701 is fixedly installed on the top of the right supporting plate 6, the inner turntable 702 is rotatably installed inside the outer ring sleeve 701, and the supporting plate 703 is fixedly installed on the top of the inner turntable 702.

[0045] The rotary reversing assembly 8 includes a driving mechanism and a lifting mechanism. The driving mechanism is fixedly installed on the top of the base, and the lifting mechanism is fixedly installed inside the right supporting seat 5. The driving mechanism and the lifting mechanism are detachably connected.

[0046] The welding robot arm 1 is used to weld the workpiece fixed on the workpiece fixing table 7. The left support seat 2 and the right support seat 5 support the left pallet 3 and the right pallet 6 to be flipped and adjusted along the Y axis. The rotating mechanism in the left support seat 2 drives the left pallet 3 and the right pallet 6 to rotate. The angle adjustment component 4 drives the workpiece fixing table 7 to be rotated and adjusted along the Z axis. The right support seat 5 is driven to lift and rotate by the rotating reversing component 8, so that the right pallet 6 is separated from the left pallet 3. The workpiece fixing table 7 on the top of the right pallet 6 is moved to the conveyor belt of the production line to receive the workpiece to be processed. The first limiting component 9 is used to rotate the workpiece fixing table 7 on the top of the right pallet 6 while the right pallet 6 is separated from the left pallet 3. The second limiting component 10 is used to flip and limit the right pallet 6 on the side of the right support seat 5 while the right pallet 6 is separated from the left pallet 3. The welding robot arm 1 can use an existing welding robot.

[0047] A turntable is arranged on the left support seat 2, a rotating mechanism is connected to the turntable, and the left support plate 3 is fixedly connected to the turntable on the corresponding side. In the present embodiment, the rotating mechanism is a servo motor; a turntable is arranged on the right support seat 5, and the right support plate 6 is fixedly connected to the turntable on the corresponding side, and the turntables on both sides are arranged opposite to each other.

[0048] The angle adjustment component 4 includes a motor box 401, a first motor 402, a rotating seat 403 and a limiting boss 404. The motor box 401 is fixedly installed at the bottom of the left support plate 3, the first motor 402 is arranged inside the motor box 401, the output end of the first motor 402 is fixedly connected with the rotating seat 403, and the rotating seat 403 is rotatably installed on the top of the left support plate 3, and the limiting boss 404 is fixedly installed on the top of the rotating seat 403; the number of the limiting boss 404 is multiple groups, and the multiple groups of limiting bosses 404 are arranged in a circular array on the top of the rotating seat 403. The first motor 402 is protected by the motor box 401, and the rotating seat 403 is driven to rotate by the first motor 402, so that the inner turntable 702 rotates accordingly, and the workpiece is controlled to rotate along the Z axis to adjust the workpiece angle. The limiting boss 404 is plugged into the inner turntable 702 to complete the quick connection and fixation of the angle adjustment component 4 and the workpiece fixing table 7.

[0049] The right support seat 5 also includes a U-shaped plug plate 504 and a first spring 505. Vertical portions are provided on both sides of the rotating base frame 503, and the vertical portions extend into the outer sleeve of the sliding sleeve 501. A groove is provided at the top of the vertical portion of the rotating base frame 503, and a U-shaped plug plate 504 is slidably installed inside the groove. A first spring 505 is fixedly installed inside the groove, and the first spring 505 is connected to the U-shaped plug plate 504. The side of the U-shaped plug plate 504 that contacts the rotating tray 807 is arc-shaped, and the U-shaped plug plate 504 is pushed to slide in the groove of the rotating base frame 503 by the first spring 505.

[0050] A mechanical claw is provided on the top of the support plate 703. The number of mechanical claws is multiple and arranged in an array. The workpiece is clamped and fixed by the mechanical claw on the top of the support plate 703. The mechanical claw can be an existing one, such as using a cylinder to drive the pressing block to move, so as to achieve the compaction of the workpiece.

[0051] The driving mechanism includes a second motor 806, a rotating tray 807, a slide groove 808 and a limiting sliding member 809. The second motor 806 is fixedly installed on the top of the base and is located inside the right supporting seat 5. The rotating tray 807 is fixedly installed on the output end of the second motor 806. The rotating tray 807 is provided with a slide groove 808. The limiting sliding member 809 is slidably installed inside the slide groove 808. The number of the slide grooves 808 is multiple groups, and the multiple groups of slide grooves 808 are arranged in a circular array. The limiting sliding member 809 includes a rod body, a baffle and an arc plate. The rod body is slidably installed in the slide groove 808 and is arranged along the radial direction of the rotating tray 807. The baffle has two fixedly installed on both sides of the rod body. Concave limiting portions cooperating with the rod body are arranged on both sides of the middle part of the slide groove 808. The outer end of the slide groove 808 is provided with a locking portion cooperating with the arc plate. The arc plate is fixedly installed at one end of the rod body away from the axis of the rotating tray 807. The second motor 806 drives the rotating tray 807 to rotate, thereby controlling the top seat 502 to perform lifting and lowering motion, or driving the right support seat 5 to perform steering motion, by inserting the conversion link 803 into the interior of the rotating tray 807, relying on the gravity of the conversion link 803 to push the limiting slide 809 to slide along the interior of the slide slot 808, so that the limiting slide 809 pushes the U-shaped plug 504 out of the locking portion of the slide slot 808, at this time, the outer side of the arc plate of the limiting slide 809 is just flush with the side of the rotating tray 807 to avoid hindering the rotation of the rotating tray 807, and a conversion spring that pushes the conversion link 803 down can also be set between the conversion link 803 and the screw 802, so that the lifting mechanism is connected to the driving mechanism. The U-shaped plug 504 can be inserted into the locking portion of the slide slot 808, thereby circumferentially locking the rotating tray 807 to prevent it from rotating.

[0052] Furthermore, a return spring may be provided between the limit sliding member 809 and the rotating tray 807 to return the limit sliding member 809 to its original position after the conversion link 803 is separated from the rotating tray 807 .

[0053] The inner end of each rod body is provided with an inclined pushing portion which gradually approaches the conversion link 803 from top to bottom. The conversion link 803 is a square rod. A square hole matching with the conversion link 803 is provided in the middle of the rotating tray 807 .

[0054] The lifting mechanism includes a limit sleeve 801, a screw 802, a conversion link 803, an electromagnet 804 and a support slide 805. The limit sleeve 801 is fixedly installed inside the outer sleeve of the sliding sleeve 501. The screw 802 is rotatably installed inside the limit sleeve 801. The conversion link 803 is slidably inserted inside the screw 802. An adsorption block is fixedly installed on the top of the conversion link 803. A connecting plate is fixedly installed on the surface of the limit sleeve 801, and an electromagnet 804 is provided on the top of the connecting plate. The electromagnet 804 is located directly above the adsorption block of the conversion link 803. A support slide 805 is threadedly installed on the surface of the screw 802. The support slide 805 fits against the inner wall of the limit sleeve 801 and can slide relatively. The top of the support slide 805 is fixedly connected to the inner top of the top seat 502. Through the connection between the conversion link 803 and the rotating tray 807, the driving mechanism drives the lifting mechanism to rotate, and the conversion link 803 drives the screw 802 to rotate inside the limiting sleeve 801, so that the supporting slide 805 moves up and down along the inside of the limiting sleeve 801, driving the top seat 502 to adjust the height, and the adsorption block on the top of the conversion link 803 is adsorbed and fixed by the electromagnet 804, and the conversion link 803 is controlled to slide up and down inside the screw 802, thereby switching the connection between the lifting mechanism and the driving mechanism. The length of the conversion link 803 is greater than the length of the screw 802.

[0055] The first limiting assembly 9 includes a pressing plate 901, a pushing plate 902, a connecting rod 903, a pulley 904, a limiting latch 905 and a second spring 906. A first cavity is provided inside the inner turntable 702. The middle part of the pressing plate 901 is rotatably installed inside the first cavity. The upper end of the pressing plate 901 is bent toward the inside of the inner turntable 702 and is located directly above the corresponding limiting protrusion 404. The pressing plate 901 is L-shaped. The limiting latch 905 is slidably plugged and installed inside the first cavity. A push plate 902 is fixedly installed at one end of the pin 905, and both ends of the connecting rod 903 are rotatably connected to the lower end of the pressure plate 901 and the push plate 902 respectively, and the connecting rod 903 is gradually inclined upward in the direction close to the push plate 902. Pulleys 904 are provided on the upper and lower sides of the push plate 902, and the pulleys 904 are in contact with the inner wall of the first cavity. A second spring 906 is fixedly connected to the surface of the limit latch 905, and the second spring 906 is connected to the inside of the first cavity. The pressure plate 901 is pushed by the limiting boss 404 to make it rotate, and the connecting rod 903 transmits the force to pull the push plate 902 so that the limiting pin 905 slides toward the middle of the inner turntable 702 and separates from the outer ring sleeve 701, disconnecting the fixed limit of the inner turntable 702 and the outer ring sleeve 701, and the pulley 904 makes the movement of the push plate 902 more stable, and the second spring 906 pushes the limiting pin 905 into the outer ring sleeve 701, so that the inner turntable 702 and the outer ring sleeve 701 are connected and limited.

[0056] There are multiple sets of first limit assemblies 9, which are arranged in a circular array inside the inner turntable 702, and the top ends of the angle adjustment components 4 correspond one to one with the first limit assemblies 9. The multiple sets of first limit assemblies 9 ensure that the rotation limit of the workpiece fixing table 7 is sufficiently stable.

[0057] The second limiting assembly 10 includes a trapezoidal push block 1001, a third spring 1002, an upper rack 1003, a transmission gear 1004, a lower rack 1005 and a limiting plug rod 1006. A second cavity is provided inside the right support plate 6. The trapezoidal push block 1001 is slidably installed inside the second cavity. A third spring 1002 is fixedly installed on one side of the trapezoidal push block 1001 away from the angle adjustment component 4, and the third spring 1002 is connected to the inner wall of the second cavity. The upper rack 1003 is slidably installed on the second cavity. The interior of the cavity, and the upper rack 1003 is fixedly connected to the trapezoidal push block 1001, the transmission gear 1004 is rotatably installed in the interior of the second cavity, and the lower rack 1005 is slidably installed in the interior of the second cavity, the upper rack 1003 and the lower rack 1005 are respectively arranged on the upper and lower sides of the transmission gear 1004, and are respectively engaged with the corresponding sides of the transmission gear 1004, the limiting plug 1006 is slidably inserted into the interior of the right support plate 6, and the lower rack 1005 is fixedly connected to the limiting plug 1006. The side of the trapezoidal push block 1001 close to the rotating seat 403 is inclined from bottom to top and gradually approaches the rotating seat 403. The trapezoidal push block 1001 is pushed by the rotating seat 403, so that the trapezoidal push block 1001 slides into the second cavity of the right support plate 6, thereby driving the upper rack 1003 to slide inside the second cavity, and through the transmission gear 1004, the lower rack 1005 pulls the limit plug rod 1006 to separate from the socket on the turntable of the right support seat 5, disconnecting the rotation limit of the right support plate 6 and the right support seat 5, and the trapezoidal push block 1001 is pushed out of the second cavity of the right support plate 6 by the third spring 1002, so that the connection between the right support plate 6 and the right support seat 5 is limited.

[0058] The number of the upper rack 1003, the transmission gear 1004, the lower rack 1005 and the limit rod 1006 is two groups, and the two groups of the upper rack 1003, the transmission gear 1004, the lower rack 1005 and the limit rod 1006 are symmetrically arranged inside the right support plate 6. The right support plate 6 and the right support seat 5 are connected and limited by the two groups of limit rods 1006, so as to ensure the stability of the rotation limit.

[0059] In summary, when the present invention is in use, when the staff is welding the workpiece, the workpiece is transmitted to the front of the device on the feeding conveyor belt, and the electromagnet 804 is controlled to stop the adsorption and fixation of the conversion link 803, so that the conversion link 803 slides down along the inside of the screw 802 and is inserted into the top of the rotating tray 807, and the limiting sliding member 809 inside the slide groove 808 is pushed outward along the axis, and the U-shaped plug plate 504 is pushed out of the slide groove 808 by relying on the limiting sliding member 809. At this time, the outer side of the limiting sliding member 809 is just flush with the side of the rotating tray 807 to avoid hindering the rotation of the rotating tray 807, completing the connection between the lifting mechanism and the driving mechanism, and at this time starting the second motor 806 to drive the rotating tray 807 to rotate, so that the rotating tray 807 drives the screw 802 to rotate, and the screw 802 drives the supporting slide plate 805 to move up inside the limiting sleeve plate 801, so that the top seat 502 moves up, drives the right support plate 6 to move up and separate from the left support plate 3, and completes the left and right parts of the positioner. The first motor 402 drives the rotating seat 403 to rotate so that the workpiece is rotated along the Z axis, and the welding robot arm 1 approaches the surface of the workpiece to perform welding processing on the workpiece. After the processing is completed, the operation is repeated to move the workpiece to the front of the device, and the workpiece is sent out by the discharge conveyor belt.

[0060] When the right support plate 6 is separated from the left support plate 3, in order to ensure that the right support plate 6 and the workpiece fixing platform 7 will not rotate accidentally, causing the workpiece thereon to detach or fall off, when the right support plate 6 moves up, the limiting boss 404 slides out of the first cavity in the inner turntable 702 and stops squeezing one end of the pressure plate 901. At this time, the compressed second spring 906 pushes the limiting latch 905 to slide and insert into the inner part of the outer ring sleeve 701, thereby limiting the rotation of the inner turntable 702 in the outer ring sleeve 701, and at the same time, the rotating seat 403 separates from the right support plate 6 and stops squeezing one side of the trapezoidal push block 1001. At this time, the compressed third spring 1002 pushes the trapezoidal push block 1001 to slide out of the second cavity of the right support plate 6, and the trapezoidal push block 1001 drives the upper rack 1 003 slides inside the second cavity, and through the transmission of the transmission gear 1004, the lower rack 1005 pushes the limiting rod 1006 to pass through the right support plate 6 and insert into the interior of the top seat 502, thereby limiting the rotation of the right support plate 6 on the side of the right support seat 5. In the process of the right support plate 6 moving up and separating from the left support plate 3, the rotation limit of the workpiece fixing table 7 and the right support plate 6 is quickly performed to ensure the stable operation of moving the workpiece. In the process of returning the support plate 703 that clamps the workpiece, the limiting boss 404 squeezes one end of the pressure plate 901 and the rotating seat 403 squeezes one side of the trapezoidal push block 1001, thereby quickly releasing the rotation limit of the workpiece fixing table 7 and the right support plate 6 to ensure the work efficiency of workpiece welding.

[0061] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A workpiece automatic welding device, characterized in that: It comprises a welding robot arm (1), a positioner and a base, wherein the welding robot arm (1) and the positioner are both arranged on the top of the base, and the positioner comprises a left support seat (2), a left support plate (3), a right support seat (5) and a right support plate (6); The left support seat (2) is fixedly mounted on the top of the base, a rotating mechanism is provided inside the left support seat (2), and an output end thereof is connected to one side of a left support plate (3), an inclined surface is provided on the other side of the left support plate (3), and an angle adjustment component (4) is provided at the bottom of the inclined surface of the left support plate (3); The right support seat (5) is rotatably mounted on the top of the base, one side of the right support plate (6) is rotatably connected to the right support seat (5), the other side of the right support plate (6) is provided with an inclined surface, the inclined surface at the right support plate (6) is arranged corresponding to the inclined surface at the left support plate (3), and a workpiece fixing table (7) is fixedly mounted on the top of the inclined surface of the right support plate (6), a rotation reversing component (8) is provided inside the right support seat (5), a first limiting component (9) for limiting the rotation of the workpiece fixing table (7) is provided inside the workpiece fixing table (7), and a second limiting component (10) for limiting the rotation of the right support plate (6) is provided inside the right support plate (6); The right support seat (5) comprises a sliding sleeve (501), a top seat (502) and a rotating base frame (503), the sliding sleeve (501) comprises an outer sleeve and an inner sleeve which are slidably connected, the top seat (502) is fixedly mounted on the top of the inner sleeve, the rotating base frame (503) is rotatably mounted on the top of the base, and the rotating base frame (503) is fixedly connected to the outer sleeve; The workpiece fixing platform (7) comprises an outer ring sleeve (701), an inner rotating disk (702) and a supporting plate (703), wherein the outer ring sleeve (701) is fixedly mounted on the top of the right supporting plate (6), the inner rotating disk (702) is rotatably mounted inside the outer ring sleeve (701), and the supporting plate (703) is fixedly mounted on the top of the inner rotating disk (702); The rotary reversing assembly (8) comprises a driving mechanism and a lifting mechanism, wherein the driving mechanism is fixedly mounted on the top of the base, and the lifting mechanism is fixedly mounted inside the right supporting seat (5), and the driving mechanism and the lifting mechanism are detachably connected.

2. The workpiece automatic welding device according to claim 1, characterized in that: The angle adjustment component (4) comprises a motor box (401), a first motor (402), a rotating seat (403) and a limiting convex column (404); the motor box (401) is fixedly mounted on the bottom of the left supporting plate (3); the first motor (402) is arranged inside the motor box (401); an output end of the first motor (402) is fixedly connected to the rotating seat (403); the rotating seat (403) is rotatably mounted on the top of the left supporting plate (3); and the limiting convex column (404) is fixedly mounted on the top of the rotating seat (403); The number of the limiting bosses (404) is multiple groups, and the multiple groups of limiting bosses (404) are arranged in a circular array on the top of the rotating seat (403).

3. The workpiece automatic welding device according to claim 1, characterized in that: The right support seat (5) further comprises a U-shaped plug plate (504) and a first spring (505); a groove is provided on the surface of the rotating base frame (503); the U-shaped plug plate (504) is slidably mounted inside the groove; the first spring (505) is fixedly mounted inside the groove; and the first spring (505) is connected to the U-shaped plug plate (504).

4. The automatic welding device for workpieces according to claim 1, characterized in that: The top of the support plate (703) is provided with mechanical claws, which are provided in multiple groups and arranged in an array.

5. The workpiece automatic welding device according to claim 1, characterized in that: The driving mechanism comprises a second motor (806), a rotating tray (807), a slide groove (808) and a limit sliding member (809); the second motor (806) is fixedly mounted on the top of the base and is located inside the right supporting seat (5); the rotating tray (807) is fixedly mounted on the output end of the second motor (806); the rotating tray (807) is provided with a slide groove (808) inside; and the limit sliding member (809) is slidably mounted inside the slide groove (808); The number of the slide grooves (808) is multiple, and the multiple slide grooves (808) are arranged in a circular array. The limiting sliding member (809) includes a rod body, a baffle and an arc plate. The baffle is fixedly installed on the surface of the rod body, and the arc plate is fixedly installed on the end of the rod body away from the axis of the rotating tray (807).

6. The workpiece automatic welding device according to claim 1, characterized in that: The lifting mechanism comprises a limit sleeve (801), a screw (802), a conversion link (803), an electromagnet (804) and a support slide (805); the limit sleeve (801) is fixedly mounted inside the outer sleeve of the sliding sleeve (501); the limit sleeve (801) is rotatably mounted with the screw (802); the conversion link (803) is slidably plugged and mounted inside the screw (802); an adsorption block is fixedly mounted on the top of the conversion link (803); a connecting plate is fixedly mounted on the surface of the limit sleeve (801); an electromagnet (804) is arranged on the top of the connecting plate; the electromagnet (804) is located above the adsorption block of the conversion link (803); a support slide (805) is threadedly mounted on the surface of the screw (802); the support slide (805) is in contact with the inner wall of the limit sleeve (801); and the top of the support slide (805) is fixedly connected to the inner top of the top seat (502).

7. The workpiece automatic welding device according to claim 1, characterized in that: The first limiting assembly (9) comprises a pressure plate (901), a push plate (902), a connecting rod (903), a pulley (904), a limiting latch (905) and a second spring (906); a first cavity is provided inside the inner rotating disk (702); the pressure plate (901) is rotatably installed inside the first cavity; the upper end of the pressure plate (901) is bent toward the inside of the inner rotating disk (702); the limiting latch (905) is slidably plugged and installed inside the first cavity; A push plate (902) is fixedly mounted on one end of the latch (905), and two ends of the connecting rod (903) are rotatably connected to the lower end of the pressing plate (901) and the push plate (902), respectively. Pulleys (904) are provided on the upper and lower sides of the push plate (902), and the pulleys (904) are in contact with the inner wall of the first cavity. A second spring (906) is fixedly connected to the surface of the limit latch (905), and the second spring (906) is connected to the inside of the first cavity.

8. The workpiece automatic welding device according to claim 1, characterized in that: The number of the first limit assemblies (9) is a plurality of groups, and the plurality of groups of first limit assemblies (9) are arranged in a circular array inside the inner rotating disk (702), and the top end of the angle adjustment component (4) is slidably plugged with the first limit assemblies (9).

9. The workpiece automatic welding device according to claim 1, characterized in that: The second limiting assembly (10) comprises a trapezoidal push block (1001), a third spring (1002), an upper rack (1003), a transmission gear (1004), a lower rack (1005) and a limiting plug rod (1006); a second cavity is provided inside the right support plate (6); the trapezoidal push block (1001) is slidably mounted inside the second cavity; a third spring (1002) is fixedly mounted on one side of the trapezoidal push block (1001); and the third spring (1002) The upper rack (1003) is connected to the inner wall of the second cavity, and the upper rack (1003) is slidably mounted inside the second cavity, and the upper rack (1003) is fixedly connected to the trapezoidal push block (1001), the transmission gear (1004) is rotatably mounted inside the second cavity, the lower rack (1005) is slidably mounted inside the second cavity, the limit rod (1006) is slidably plugged into the inside of the right support plate (6), and the lower rack (1005) is fixedly connected to the limit rod (1006); The transmission gear (1004) is located between the upper rack (1003) and the lower rack (1005), and is meshingly connected to both of them.

10. The workpiece automatic welding device according to claim 9, characterized in that: The upper rack (1003), the transmission gear (1004), the lower rack (1005) and the limit rod (1006) are provided in two groups, and the two groups of the upper rack (1003), the transmission gear (1004), the lower rack (1005) and the limit rod (1006) are symmetrically arranged inside the right support plate (6).

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