Adjustment lines and adjustment methods in welding workshop

Abstract

This invention relates to an adjustment line in a welding workshop, comprising a horizontally arranged plate chain with a plate chain support fixedly mounted on its upper surface; elevators are arranged on both sides of the plate chain, each elevator including a frame, a lifting mechanism on the top of the frame, and a support member on the top of the lifting mechanism; horizontal guide rails are arranged on both sides of the plate chain, the guide rails being parallel to the plate chain; the frame cooperates with the guide rails, and the frame is connected to a return drive mechanism; a horizontal telescopic mechanism is arranged on the frame, the telescopic mechanism being connected to a horizontal drive rod, and the telescopic direction of the telescopic mechanism and the drive rod being perpendicular to the plate chain. In this invention, during the process of lowering the workpiece from the elevator to the plate chain support, the elevator can move synchronously with the plate chain, so the plate chain does not need to stop and can move continuously, which is beneficial to improving the conveying efficiency of the workshop.

Description

Technical Field

[0001] This invention belongs to the field of transmission equipment, and in particular to an adjustment line and adjustment method in a welding workshop. Background Technology

[0002] In passenger vehicle welding (welding and assembly) workshops, the transfer line is used to transfer automotive parts. Existing transfer lines typically consist of horizontally arranged chain conveyors with chain supports for the parts. Lifts are fixedly installed on both sides of the chain, and support structures are located on top of the lifts. Part transfer is usually done at a fixed point; the part is lowered onto the support structures of the lifts via an overhead hoist. The lifts then move the part downwards, placing it onto the chain supports, and the chain conveyors then transport the part to the next workstation. During the part lowering process, both the lifts and the chain conveyors remain stationary. The chain conveyors operate intermittently, not continuously, which affects transfer efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an adjustment line and adjustment method in a welding workshop to improve work efficiency.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: a welding workshop adjustment line includes a horizontally arranged plate chain, on the upper surface of which a plate chain bracket is fixedly mounted; elevators are arranged on both sides of the plate chain, each elevator including a frame, a lifting mechanism being arranged on the top of the frame, and a support member being arranged on the top of the lifting mechanism.

[0005] The plate chain is provided with horizontal guide rails on both sides, the guide rails are parallel to the plate chain, the frame cooperates with the guide rails, and the frame is connected to a return drive mechanism.

[0006] The frame is equipped with a horizontal telescopic mechanism, which is connected to a horizontal drive rod. The telescopic direction of the telescopic mechanism and the drive rod are perpendicular to the plate chain.

[0007] Furthermore, it also includes a frame, on which the guide rail is mounted, and one end of the return drive mechanism is mounted on the frame.

[0008] Furthermore, the receiving end of the frame is provided with a first limiting frame, and the other end of the frame is provided with a vertical second limiting frame.

[0009] Furthermore, the second limiting frame is provided with a sliding rod that horizontally passes through the second limiting frame and slides in cooperation with the second limiting frame. The sliding rod is parallel to the plate chain, and a limiting block is provided at the end of the sliding rod facing the frame. A pressure sensor is provided on the side of the limiting block facing the frame. A spring is provided on the sliding rod between the limiting block and the second limiting frame. The pressure sensor and the telescopic mechanism are both connected to a first controller.

[0010] Furthermore, a buffer pad is provided at the end of the vehicle frame facing the first limiting frame.

[0011] Furthermore, both the telescopic mechanism and the return drive mechanism are cylinders.

[0012] Furthermore, the support member includes a front support arm and a rear support arm, and a support block is provided at one end of the front support arm and the rear support arm facing the plate chain bracket, and a positioning groove is provided on the upper surface of the support block.

[0013] Furthermore, the lifting mechanism is provided with a stand at the top, and a positioning shaft is provided on the stand. One end of the positioning shaft is rotatably engaged with the stand, and the other end of the positioning shaft is connected to the stand through a torque sensor. An axially extending boss is provided on the outer wall of the positioning shaft. A sleeve is fixedly provided at the end of the front support arm and the rear support arm away from the plate chain bracket. An axially penetrating positioning groove is provided on the inner wall of the sleeve. The sleeve is fitted outside the positioning shaft, and the boss is located in the positioning groove. A cantilever is fixedly provided on the side wall of the sleeve. The cantilever is coaxial with the front support arm or the rear support arm. A tension mechanism is provided between the end of the cantilever and the stand. The tension mechanism and the torque sensor are both connected to a second controller.

[0014] The adjustment methods for the aforementioned welding workshop adjustment line include:

[0015] S1. Stop the elevator at the receiving end and use the overhead hoisting equipment to lower the car parts onto the support of the elevator;

[0016] S2. The telescopic mechanism extends, pushing the drive rod to the front of the plate chain support. The plate chain support moves synchronously with the plate chain. When the plate chain support contacts the drive rod, it pushes the drive rod to move, and the drive rod drives the entire elevator to move.

[0017] S3. The lifting mechanism drives the support to move downward, and the machined parts on the support are placed onto the plate chain bracket.

[0018] S4. The telescopic mechanism drives the drive rod to reset, the drive rod disengages from the plate chain support, and the elevator stops moving.

[0019] S5, the return drive mechanism drives the elevator back to the receiving end.

[0020] Furthermore, in step S2, the drive rods on both sides of the plate chain move to the front of the plate chain bracket and then insert and connect.

[0021] The beneficial effects of the present invention are: In the process of the car parts on the elevator being lowered to the plate chain support, the elevator can move synchronously with the plate chain, so the plate chain does not need to stop and can move continuously, which is conducive to improving the conveying efficiency of the workshop. Attached Figure Description

[0022] Figure 1 This is a top view of the present invention;

[0023] Figure 2 This is a front view schematic diagram of the present invention;

[0024] Figure 3 This is a side view of the elevator;

[0025] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle;

[0026] Figure 5 This is a schematic diagram of the support component installation;

[0027] Figure 6 yes Figure 5 Cross-sectional view of BB;

[0028] Reference numerals: 1—plate chain; 2—plate chain bracket; 3—frame; 4—lifting mechanism; 5—support component; 51—front support arm; 52—rear support arm; 53—positioning groove; 54—sleeve; 55—cantilever; 56—support block; 6—guide rail; 7—return drive mechanism; 8—telescopic mechanism; 9—drive rod; 10—frame; 11—first limit frame; 12—second limit frame; 13—slide rod; 14—limit block; 15—pressure sensor; 16—spring; 17—first controller; 18—buffer pad; 19—stand; 20—positioning shaft; 21—tension mechanism; 22—boss; 23—second controller; 24—torque sensor. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] The welding workshop adjustment line of the present invention, such as Figures 1 to 6 As shown, the system includes a horizontally arranged plate chain 1. A plate chain bracket 2 is fixedly mounted on the upper surface of the plate chain 1, supporting the vehicle parts. The plate chain 1 drives the plate chain bracket 2 to move. The plate chain 1 and plate chain bracket 2 can be constructed using existing technology. Lifting mechanisms are located on both sides of the plate chain 1. Each lifting mechanism includes a frame 3, with a lifting mechanism 4 at the top of the frame 3 and a support member 5 at the top of the lifting mechanism 4. The support member 5 supports the vehicle parts, and the support members 5 on the lifting mechanisms 4 on both sides of the plate chain 1 cooperate with each other to stably support various vehicle parts. The lifting mechanism 4 drives the support member 5 to rise and fall, facilitating the lowering of the vehicle parts onto the plate chain bracket 2. The lifting mechanism 4 can employ various existing hydraulic lifting devices.

[0031] Horizontal guide rails 6 are provided on both sides of the plate chain 1, parallel to the plate chain 1. The frame 3 cooperates with the guide rails 6, and the frame 3 is connected to a return drive mechanism 7. Rollers or sliders can be provided at the bottom of the frame 3, cooperating with the guide rails 6 to allow the frame 3 to move linearly along the guide rails 6. The return drive mechanism 7 is used to pull the frame 3 back to the initial position, which is the receiving end, i.e., the position where the elevator receives the lowered parts.

[0032] A horizontal telescopic mechanism 8 is provided on the frame 3, and the telescopic mechanism 8 is connected to a horizontal drive rod 9. The telescopic direction of the telescopic mechanism 8 and the drive rod 9 are perpendicular to the plate chain 1. The telescopic mechanism 8 can drive the drive rod 9 to move horizontally. When the telescopic mechanism 8 extends, the drive rod 9 can move in front of the plate chain support 2. When the plate chain support 2 moves to the drive rod 9, it will contact the drive rod 9. As the plate chain support 2 continues to move, it will push the drive rod 9 to move synchronously with the plate chain support 2. At this time, the drive rod 9 can drive the frame 3 to move as a whole. The direction and speed of movement of the frame 3 are the same as the direction and speed of movement of the plate chain 1, that is, the frame 3 can move synchronously with the plate chain 1. While the frame 3 is moving, the vehicle parts are lowered onto the plate chain support 2.

[0033] The specific operation process of this invention is as follows: In the initial state, the frame 3 is at the receiving end and remains stationary, the telescopic mechanism 8 is in a retracted state, the drive rod 9 does not obstruct the movement of the plate chain support 2, the support member 5 is in a position higher than the plate chain support 2, and the plate chain 1 and the plate chain support 2 move continuously at a uniform speed. The hoisting equipment hoists the part above the support member 5, and then lowers the part onto the support member 5. The telescopic mechanism 8 extends, driving the drive rod 9 to move in front of the plate chain support 2. After the plate chain support 2 contacts the drive rod 9, it pushes the drive rod 9 to move, and the drive rod 9 drives the frame 3 to move as a whole. As the frame 3 moves synchronously with the plate chain 1, the lifting mechanism 4 drives the support member 5 to move downward, so that the height of the support member 5 is lower than the height of the top of the plate chain support 2, thus allowing the part on the support member 5 to be lowered onto the plate chain support 2. Then the telescopic mechanism 8 retracts, driving the drive rod 9 to reset, so that the drive rod 9 disengages from the plate chain support 2, the plate chain support 2 continues to move normally, and the frame 3 stops running. Finally, the return drive mechanism 7 pulls the frame 3 back to the receiving end, and the lifting mechanism 4 drives the support 5 to reset upward, so that the frame 3 returns to its initial state.

[0034] As can be seen, in this invention, during the process of lowering the vehicle parts on the elevator to the plate chain support 2, the elevator can move synchronously with the plate chain 1 at the same speed, so that the plate chain 1 does not need to stop and can move continuously, thereby improving the transmission efficiency.

[0035] The return drive mechanism 7 is only used to pull the frame 3 back to the receiving end, and not to push the frame 3 to move with the plate chain 1, because the return drive mechanism 7 has difficulty in accurately controlling the moving speed of the frame 3 and cannot ensure that the moving speed of the frame 3 is completely consistent with the moving speed of the plate chain 1.

[0036] The present invention also includes a frame 10, a guide rail 6 fixedly mounted on the frame 10, and a return drive mechanism 7 mounted on the frame 10.

[0037] To limit the position of the frame 3 and ensure that it accurately stops at the initial position at the receiving end, the receiving end of the frame 10 is provided with a first limiting frame 11. When the frame 3 returns, it stops moving when its end contacts the first limiting frame 11. The other end of the frame 10 is provided with a vertical second limiting frame 12, which can block the frame 3, limit its position, and prevent it from moving too far and going beyond the guide rail 6.

[0038] When the frame 3 reaches the second limiting frame 12, the frame 3 stops moving. At this time, if the drive rod 9 has not yet retracted to its initial position, there is a large resistance between the drive rod 9 and the plate chain support 2, which may cause damage to the plate chain support 2. In order to ensure that the frame 3 is released from synchronous movement with the plate chain 1 in time before reaching the second limiting frame 12 and to prevent damage to the plate chain support 2, the second limiting frame 12 of the present invention is provided with a slide rod 13 that runs horizontally through the second limiting frame 12 and slides in cooperation with the second limiting frame 12. The slide rod 13 is parallel to the plate chain 1, and a limiting block 14 is provided at one end of the slide rod 13 facing the frame 3. A pressure sensor 15 is provided on the side of the limiting block 14 facing the frame 3. A spring 16 is provided on the slide rod 13 between the limiting block 14 and the second limiting frame 12. The pressure sensor 15 and the telescopic mechanism 8 are both connected to the first controller 17. When the frame 3 approaches the second limit frame 12, the frame 3 first contacts the limit block 14, and the pressure sensor 15 is subjected to the pressure of the frame 3. As the frame 3 moves, the limit block 14 squeezes the spring 16, and the pressure on the pressure sensor 15 gradually increases. The pressure sensor 15 transmits the pressure signal to the first controller 17. When the first controller 17 receives the pressure signal, it controls the telescopic mechanism 8 to retract, driving the drive rod 9 to disengage from the plate chain support 2, preventing the drive rod 9 from blocking the movement of the plate chain support 2, thereby ensuring the normal operation of the plate chain support 2.

[0039] In order to reduce the collision force between the first limiting frame 11 and the frame 3, a buffer pad 18 is provided at one end of the frame 3 facing the first limiting frame 11. The buffer pad 18 is made of existing rubber pads, sponge pads, etc.

[0040] In this invention, both the telescopic mechanism 8 and the return drive mechanism 7 are cylinders, but commonly used devices capable of driving equipment to perform linear motion, such as hydraulic cylinders and linear motors, can also be used.

[0041] In this invention, the support member 5 can be a support platform positioned directly above the lifting mechanism 4. However, since the two lifting mechanisms are located on both sides of the plate chain 1 with an appropriate distance between them, if the width of a certain part is smaller than the distance between the lifting mechanisms, the part cannot be supported. To facilitate the support of parts of various widths, the support member 5 of this invention includes a front support arm 51 and a rear support arm 52. Support blocks 52 are provided at the ends of the front and rear support arms 51 and 52 facing the plate chain bracket 2, and positioning grooves 53 are provided on the upper surface of the support blocks 52. The front and rear support arms 51 and 52 can be rectangular rods, located on both sides of the plate chain bracket 2 to ensure that the parts on the front and rear support arms 51 and 52 can be supported by the plate chain bracket 2 when the front and rear support arms 51 and 52 move downwards. The positioning grooves 53 can position the parts and prevent them from sliding. To facilitate the positioning of parts of various widths, multiple anti-slip grooves can be provided on the upper surfaces of the front support arm 51 and the rear support arm 52. The sides of the smaller parts are supported and limited by the positioning grooves 53, while the sides of the larger parts are supported and limited by the anti-slip grooves on the front support arm 51 and the rear support arm 52, thereby enabling the support of parts of various widths.

[0042] When the front support arm 51 and the rear support arm 52 are used to support the vehicle part, one end of the front support arm 51 and the rear support arm 52 are fixedly connected to the top of the lifting mechanism 4. The front support arm 51 and the rear support arm 52 are cantilevered. The center of gravity of the vehicle part is far from the center of gravity of the frame 3. After the front support arm 51 and the rear support arm 52 bear the weight of the vehicle part, the force is transmitted to the lifting mechanism 4. At this time, one side of the frame 3 is subjected to force, while the other side is not subjected to force, resulting in an unbalanced force. Especially when the weight of the vehicle part is large, it is easy for the frame 3 to tip over to the side of the plate chain 1. To improve the stability of the frame 3, a support frame 19 is provided on the top of the lifting mechanism 4. A positioning shaft 20 is provided on the support frame 19. One end of the positioning shaft 20 is rotatably engaged with the support frame 19, and the other end of the positioning shaft 20 is connected to the support frame 19 through a torque sensor 21. An axially extending boss 22 is provided on the outer wall of the positioning shaft 20. A circular sleeve 54 is fixedly provided at the end of the front support arm 51 and the rear support arm 52 away from the plate chain bracket 2. A positioning groove axially penetrates the inner wall of the sleeve 54. The sleeve 54 is sleeved on the outside of the positioning shaft 20, and the boss 22 is located in the positioning groove. A cantilever 55 is fixedly provided on the side wall of the sleeve 54. The cantilever 55 is coaxial with the front support arm 51 or the rear support arm 52. A tension mechanism 21 is provided between the end of the cantilever 55 and the support frame 19. Both the tension mechanism 21 and the torque sensor 21 are connected to a second controller 23. The tension mechanism 21 can be a hydraulic cylinder or other equipment.

[0043] After the front support arm 51 and the rear support arm 52 bear the weight of the vehicle part, they transmit the force to the positioning shaft 20 through the sleeve 54. At this time, the positioning shaft 20 is subjected to torque. The torque sensor 21 detects the magnitude of the torque and then transmits the detection signal to the second controller 23. The second controller 23 controls the tension mechanism 21 to apply an appropriate downward tension to the cantilever 55 according to the magnitude of the torque. The front support arm 51 and the rear support arm 52 are located on one side of the frame 19, and the cantilever 55 is located on the other side of the frame 19. When the front support arm 51 and the rear support arm 52 bear the weight of the vehicle part, they apply a downward tension to the cantilever 55, so that the forces on both sides of the frame 19 are balanced, thereby balancing the forces on the entire frame 3, improving the stability of the frame 3, and preventing the frame 3 from overturning.

[0044] The second controller 23 and the first controller 17 can be the same controller, specifically a PLC or similar device.

[0045] The present invention provides a method for adjusting the adjustment line in a welding workshop, comprising:

[0046] S1. Stop the elevator at the receiving end and use the overhead hoisting equipment to lower the car parts onto the support 5 of the elevator;

[0047] S2. The telescopic mechanism 8 extends, pushing the drive rod 9 to move in front of the plate chain support 2. The plate chain support 2 moves synchronously with the plate chain 1. When the plate chain support 2 contacts the drive rod 9, it pushes the drive rod 9 to move, and the drive rod 9 drives the entire elevator to move.

[0048] S3, the lifting mechanism 4 drives the support 5 to move downward, and the car parts on the support 5 are placed onto the plate chain bracket 2;

[0049] S4. The telescopic mechanism 8 drives the drive rod 9 to reset, the drive rod 9 disengages from the plate chain bracket 2, and the elevator stops moving.

[0050] S5, the return drive mechanism 7 drives the elevator back to the receiving end.

[0051] In step S2, the drive rods 9 on both sides of the plate chain 1 move to the front of the plate chain bracket 2 and then plug in. Specifically, the drive rods 9 on both sides of the plate chain 1 are coaxially arranged, with a plug at the end of one drive rod 9 and a socket at the end of the other drive rod 9. After the drive rod 9 extends, the plug can be inserted into the socket, so that the two drive rods 9 are connected as one, thereby connecting the frames 3 on both sides of the plate chain 1 as one, improving the stability of the two frames 3 during movement.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A welding workshop adjustment line, comprising a horizontally arranged plate chain (1), wherein a plate chain bracket (2) is fixedly arranged on the upper surface of the plate chain (1); elevators are arranged on both sides of the plate chain (1), wherein the elevators include a frame (3), a lifting mechanism (4) is arranged on the top of the frame (3), and a support member (5) is arranged on the top of the lifting mechanism (4), characterized in that: The plate chain (1) is provided with horizontal guide rails (6) on both sides. The guide rails (6) are parallel to the plate chain (1). The frame (3) cooperates with the guide rails (6) and the frame (3) is connected to the return drive mechanism (7). The frame (3) is provided with a horizontal telescopic mechanism (8), the telescopic mechanism (8) is connected to a horizontal drive rod (9), and the telescopic direction of the telescopic mechanism (8) and the drive rod (9) are perpendicular to the plate chain (1). The support member (5) includes a front support arm (51) and a rear support arm (52). The front support arm (51) and the rear support arm (52) are provided with a support block (56) at one end facing the plate chain bracket (2). The upper surface of the support block (56) is provided with a positioning groove (53). The top of the lifting mechanism (4) is provided with a stand (19), and a positioning shaft (20) is provided on the stand (19). One end of the positioning shaft (20) is rotatably engaged with the stand (19), and the other end of the positioning shaft (20) is connected to the stand (19) through a torque sensor (24). The outer wall of the positioning shaft (20) is provided with an axially extending boss (22). A sleeve (54) is fixedly provided at the end of the front support arm (51) and the rear support arm (52) away from the plate chain bracket (2). 4) An axially penetrating positioning groove is provided on the inner wall of the sleeve (54), the sleeve (54) is sleeved outside the positioning shaft (20), and the boss (22) is located in the positioning groove; a cantilever (55) is fixedly provided on the side wall of the sleeve (54), the cantilever (55) is coaxial with the front support arm (51) or the rear support arm (52); a tension mechanism (21) is provided between the end of the cantilever (55) and the upright (19), and the tension mechanism (21) and the torque sensor (21) are both connected to a second controller (23).

2. The welding workshop adjustment line as described in claim 1, characterized in that: It also includes a frame (10), the guide rail (6) is mounted on the frame (10), and the return drive mechanism (7) is mounted on the frame (10).

3. The welding workshop adjustment line as described in claim 2, characterized in that: The receiving end of the frame (10) is provided with a first limiting frame (11), and the other end of the frame (10) is provided with a vertical second limiting frame (12).

4. The welding workshop adjustment line as described in claim 3, characterized in that: The first limiting frame (11) is provided with a sliding rod (13) that horizontally passes through the second limiting frame (12) and slides with the second limiting frame (12). The sliding rod (13) is parallel to the plate chain (1), and a limiting block (14) is provided at one end of the sliding rod (13) facing the frame (3). A pressure sensor (15) is provided on the side of the limiting block (14) facing the frame (3). A spring (16) is provided on the sliding rod (13) between the limiting block (14) and the second limiting frame (12). The pressure sensor (15) and the telescopic mechanism (8) are both connected to the first controller (17).

5. The welding workshop adjustment line as described in claim 3, characterized in that: The frame (3) is provided with a buffer pad (18) at one end facing the first limiting frame (11).

6. The welding workshop adjustment line as described in claim 1, characterized in that: Both the telescopic mechanism (8) and the return drive mechanism (7) are cylinders.

7. The method for adjusting the welding workshop adjustment line as described in any one of claims 1 to 6, characterized in that: include: S1. Stop the elevator at the receiving end and use the overhead hoisting equipment to lower the car parts onto the support (5) of the elevator; S2. The telescopic mechanism (8) extends, pushing the drive rod (9) to move to the front of the plate chain bracket (2). The plate chain bracket (2) moves synchronously with the plate chain (1). When the plate chain bracket (2) contacts the drive rod (9), it pushes the drive rod (9) to move, and the drive rod (9) drives the entire elevator to move. S3, The lifting mechanism (4) drives the support (5) to move downward, and the car parts on the support (5) are placed on the plate chain bracket (2); S4. The telescopic mechanism (8) drives the drive rod (9) to reset, the drive rod (9) disengages from the plate chain bracket (2), and the elevator stops moving; S5, the return drive mechanism (7) drives the elevator back to the receiving end.

8. The adjustment method as described in claim 7, characterized in that: In step S2, the drive rods (9) on both sides of the plate chain (1) move to the front of the plate chain bracket (2) and then insert and connect.

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