Lifting lug and secondary utilization production line

CN122606350APending Publication Date: 2026-08-21CHINA SHIPBUILDING (TIANJIN) SHIPBUILDING CO LTD
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Patent Information

Application Number
CN202610687927.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-19
Publication Date
2026-08-21

AI Technical Summary

Technical Problem

[0002]在船舶生产和维修过程中,会在分段的船身的预设位置连接吊耳,根据工作场景以及实际需要,吊耳的品类和规格(如吊耳的长度、宽度、厚度等)也不相同,而且由于吊耳在工作中通常需要面对较高负载,因此在使用过程中也容易导致吊耳损坏

Benefits of technology

[0017]本发明采用在运动通道两侧设置加工工位,使得运动通道内的运料机械手能将待加工的物料分别送入各个工位内,减少各个工位之间的输送设备,从而减少了生产线的占地,同时降低了生产线的陈本,通过分别设置焊接工位和切割工位,使得在一个生产线内即可以实现吊耳的焊接生产以及被损坏吊耳的切割,以便于对损坏吊耳的部分进行回收和再生产,以通过更小的占地,获取吊耳生产和维修两条生产线的作用;

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Abstract

The present application provides a lug and secondary utilization production line, including a movement channel and a material conveying manipulator moving along the movement channel, the movement channel is provided with a feeding part at one end, along the movement direction of the manipulator, a plurality of processing stations are respectively arranged on both sides of the channel, including a welding station and a cutting station. The welding station includes a clamping jaw and a welding gun manipulator, the clamping jaw includes a fixed foot and an opening and closing foot, both of which have a clamping space, and the end of the opening and closing foot can be close to or away from the fixed foot. The cutting station is provided with a support saddle and a cutting manipulator, and the support saddle is provided with a pressing cylinder on one side, and the piston rod of the pressing cylinder can be close to or away from the side edge of the support saddle. The present application sets processing stations on both sides of the movement channel, so that the material conveying manipulator can send the materials into each station respectively, reduces the conveying equipment between the stations, reduces the land occupation and cost of the production line; at the same time, the welding and cutting stations are arranged, the lug welding production and the cutting of the damaged lug for recycling are completed in the same production line, and the double functions of lug production and maintenance are realized with smaller land occupation.
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Description

Technical Field

[0001] This invention belongs to the field of ship lifting lug production and maintenance technology, and particularly relates to a lifting lug and secondary utilization production line. Background Technology

[0002] During ship production and maintenance, lifting lugs are connected to pre-set positions on the hull sections. Depending on the work scenario and actual needs, the types and specifications of the lifting lugs (such as the length, width, and thickness of the lugs) are different. Moreover, since the lifting lugs usually need to face high loads during operation, they are also prone to damage during use.

[0003] The production process of lifting lugs involves many steps, and damaged lugs often require a separate production line for repair. This results in a large footprint and high cost for lug production and repair. Furthermore, when dealing with lugs of various specifications, the production line also needs to be adjusted accordingly, leading to a decrease in the efficiency of lug production or repair. Summary of the Invention

[0004] In order to solve the problems existing in the background art, the purpose of the present invention is to provide a production line for lifting lugs and their secondary use, so as to reduce the equipment footprint for lifting lug production and maintenance, while improving production efficiency.

[0005] A production line for lifting lugs and their secondary use includes a motion channel and a material handling robot moving along the motion channel. One end of the motion channel has a feeding section, and multiple processing stations are located on both sides of the motion channel along the robot's movement direction. The processing stations include welding stations and cutting stations. Through the welding and cutting stations, the welding of lifting lugs and the cutting of damaged lifting lugs can be achieved within a single production line, facilitating the recycling and reprocessing of damaged lifting lugs.

[0006] The welding station includes a gripper and a welding gun robot. The gripper includes a fixed foot and an opening / closing foot, with a clamping space between the fixed foot and the opening / closing foot. The end of the opening / closing foot can approach or move away from the fixed foot to achieve clamping and releasing of the lifting lug to be processed. The cutting station includes a support saddle and a cutting robot. One side of the support saddle has a clamping cylinder, and the piston rod of the clamping cylinder can approach or move away from the side of the support saddle.

[0007] Furthermore, along a direction perpendicular to the ground, the fixed foot is located below the opening and closing foot, and the end of the opening and closing foot has a rotating block. The rotating block includes a rotating part and a gravity part. The rotating part is rotatably connected to the opening and closing foot, and the gravity part is located in the clamping space, and the gravity part has a clamping surface facing the fixed foot.

[0008] Furthermore, hinge ears extend vertically upward from both sides of the fixed foot, and the middle part of the opening and closing foot is rotatably connected to the hinge ears. The cylinder body of a cylinder is fixed on the fixed foot, and the piston rod is hinged to the end of the opening and closing foot away from the rotating block.

[0009] Furthermore, the opening and closing foot has a limiting groove near the end of the rotating block, the rotating block has a limiting pin, the limiting pin is located in the limiting groove, the rotation axis of the rotating block is located on the plane where the two sides of the limiting groove are located, and there is an included angle between the two sides of the limiting groove.

[0010] Furthermore, the material handling robot includes a magnetic suction unit, which includes a magnetic suction head, a fixed plate, a guide rod, and a spring. The spring is sleeved on the guide rod, the fixed plate has a through hole, the guide rod passes through the through hole, one end of the spring abuts against the magnetic suction head, and the other end abuts against the fixed plate.

[0011] Furthermore, the feeding section includes a slide table, and the slide table has a placement platform on its slider. Each placement platform has a support column and / or a support plate. The support plate is located on one side of the support column, and the plane of the support plate is parallel to the axis of the support column. The upper surface of the support plate is on the same plane as the upper surface of the support column.

[0012] Furthermore, the processing station also includes a storage station, which includes multiple placement platforms. Each placement platform has a support column and / or a support plate. The support plate is located on one side of the support column, and the plane of the support plate is parallel to the axis of the support column. The upper surface of the support plate is on the same plane as the upper surface of the support column.

[0013] Furthermore, the storage station includes at least two shelves, and multiple shelves are arranged along the height direction. Compared to the upper shelf, the lower shelf is closer to the movement channel, and the anti-counterfeiting platform is fixed on the shelf.

[0014] Furthermore, each of the aforementioned shelves has multiple mounting positions, and each mounting position has a support column fixing part and a support plate fixing part. The placement platform is located at the mounting position, the support column fixing part can correspond to the support column, and the support plate fixing part can correspond to the support plate.

[0015] Furthermore, the support column extends a positioning column along its own axis, and the top of the positioning column is higher than the plane where the top of the support piece is located.

[0016] The beneficial technical effects of this invention are as follows:

[0017] This invention employs processing stations set on both sides of the motion channel, allowing the material handling robot in the motion channel to deliver the materials to be processed into each station separately, reducing the need for conveying equipment between stations, thereby reducing the floor space of the production line and lowering the production line cost. By setting welding and cutting stations separately, welding of lifting lugs and cutting of damaged lifting lugs can be achieved in one production line, facilitating the recycling and remanufacturing of damaged lifting lugs. This allows the benefits of two production lines for lifting lug production and repair to be achieved with a smaller floor space.

[0018] By using a rotating block at the end of the opening and closing foot, the clamping surface can cope with different opening and closing angles of the opening and closing foot under the action of gravity, so that the clamping surface remains parallel to the horizontal plane. This ensures that the clamping surface and the upper surface of the fixed foot face each other, so that when the jaws face the lifting lugs of different thicknesses, the clamping surface always faces the surface of the lifting lug to be clamped, avoiding contact between the edges and corners of the opening and closing foot and the surface of the lifting lug, which would cause damage to the lifting lug.

[0019] By setting a limiting groove on the opening and closing foot, and the rotating block cooperating with the limiting groove through the limiting pin, the rotation range of the rotating block is avoided to prevent the rotating block from rotating too much and getting stuck with the structure of the opening and closing foot, which would affect the subsequent clamping work of the lifting lug.

[0020] By incorporating a guide rod and a spring between the magnetic suction head and the fixed plate, the contact between the magnetic suction head and the lifting lug is buffered by the spring after the magnetic suction head attracts and grabs the lifting lug. This mitigates the potential risks of material fatigue caused by impact on the magnetic suction unit during prolonged use and improves the service life of the equipment.

[0021] By setting up a storage station, operators can place multiple processing lugs into the storage station in one place and then wait for the production line to process them, saving manpower and reducing the labor intensity of operators. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a lifting lug and secondary utilization production line provided in Embodiment 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of the feeding section structure of a lifting lug and secondary utilization production line provided in Embodiment 1 of the present invention;

[0024] Figure 3 This is a schematic diagram of a lifting lug and a placement platform for a secondary utilization production line provided in Embodiment 1 of the present invention;

[0025] Figure 4 This is a schematic diagram of the welding station gripper and rotating shaft cooperation structure of a lifting lug and secondary utilization production line provided in Embodiment 1 of the present invention;

[0026] Figure 5This is a schematic diagram of a lifting lug and a gripper structure for a secondary utilization production line provided in Embodiment 1 of the present invention;

[0027] Figure 6 This is a schematic diagram of the opening and closing leg structure of a lifting lug and a secondary utilization production line provided in Embodiment 1 of the present invention;

[0028] Figure 7 This is a schematic diagram of a magnetic suction unit structure for a lifting lug and a secondary utilization production line provided in Embodiment 2 of the present invention;

[0029] Figure 8 This is a schematic diagram of the cutting station structure of a lifting lug and secondary utilization production line provided in Embodiment 1 of the present invention;

[0030] Figure 9 This is a schematic diagram of the material storage station structure of a lifting lug and secondary utilization production line provided in Embodiment 1 of the present invention. Detailed Implementation

[0031] This invention is disclosed.

[0032] The following description, in conjunction with the accompanying drawings, provides a clearer and more complete account of a lifting lug and a secondary utilization production line provided by the present invention:

[0033] Example 1

[0034] This embodiment provides a lifting lug and secondary utilization production line, including a motion channel 1 and a material handling robot 11 moving along the motion channel 1. A feeding section 2 is provided at one end of the motion channel 1, and multiple processing stations are provided on both sides of the motion channel 1 along the movement direction of the material handling robot 11. By setting processing stations on both sides of the motion channel 1, the material handling robot 11 in the motion channel 1 can deliver the materials to be processed into each station, reducing the amount of conveying equipment between stations, thereby reducing the floor space occupied by the production line and lowering the production line cost. It is understood that the robot can be driven by a slide rail and a sliding seat moving along the slide rail. The robot is mounted on the sliding seat, which can be driven to move along the slide rail by a chain or lead screw nut, etc. The specific arrangement of the slide rail and sliding seat is prior art in this field and will not be described further here. The material handling robot 11 can move in the motion channel 1 or grab a workpiece in a certain station by a pre-set working trajectory to transfer the workpiece. How to set the robot's motion trajectory and control the robot to move to the predetermined position to grab the workpiece is the prior art in this field, and will not be described in detail here.

[0035] The processing station includes a welding station 31 and a cutting station 32. By setting up welding station 31 and cutting station 32 respectively, the welding production of lifting lug 4 and the cutting of damaged lifting lug 4 can be realized in one production line, so as to facilitate the recycling and reprocessing of damaged lifting lug 4 parts. Thus, the function of two production lines for lifting lug 4 production and repair can be achieved with a smaller footprint.

[0036] In this embodiment, the welding station 31 includes a gripper 311 and a welding torch robot 312. The gripper 311 includes a fixed foot 3111 and an opening / closing foot 3112, with a clamping space 3113 between the fixed foot 3111 and the opening / closing foot 3112. The end of the opening / closing foot 3112 can approach or move away from the fixed foot 3111 to clamp and release the lifting lug 4 to be processed. Specifically, in a direction perpendicular to the ground, the fixed foot 3111 is located below the opening / closing foot 3112, and the end of the opening / closing foot 3112 has a rotating block 3114. The rotating block 3114 includes a rotating part 31141 and a gravity part 31142. The rotating part 31141 is rotatably connected to the opening / closing foot 3112, and the gravity part 31142 is located within the clamping space 3113, with a clamping surface 31143 on the side of the gravity part 31142 facing the fixed foot 3111. When the opening and closing foot 3112 is at different opening and closing angles, the gravity part 31142 of the rotating block 3114 can rotate under its own weight, so that the clamping surface 31143 always remains parallel to the horizontal plane, thereby making the clamping surface 31143 correspond to the upper surface of the fixed foot 3111. This ensures that when the gripper 311 faces the lifting lug 4 of different thicknesses, the clamping surface 31143 always faces the surface to be clamped of the lifting lug 4, avoiding contact between the edges and corners of the opening and closing foot 3112 and the surface of the lifting lug 4, which could cause damage to the lifting lug 4.

[0037] The fixed foot 3111 extends vertically upward from both sides to form hinge ears 3116. The middle part of the opening / closing foot 3112 is rotatably connected to the hinge ears 3116. The cylinder body of a cylinder 3115 is fixed to the fixed foot 3111, and the piston rod of the cylinder 3115 is hinged to the end of the opening / closing foot 3112 away from the rotating block 3114. By extending and retracting the cylinder 3115, the opening / closing foot 3112 is driven to rotate around the hinge ears 3116, thereby realizing the opening and closing of the clamping space 3113. In this embodiment, one end of the opening / closing foot 3112 has a slot, and the rotating block 3114 is located in the slot. The rotating part 31141 of the rotating block 3114 and the two sides of the slot are rotatably connected by a shaft. This makes the force on the rotating block 3114 more uniform and improves the reliability of clamping the lifting lug 4.

[0038] The opening / closing foot 3112 has a limiting groove 31121 at one end near the rotating block 3114. The rotating block 3114 has a limiting pin 31144, which is located within the limiting groove 31121. The rotation axis of the rotating block 3114 is located on the plane containing the two side walls of the limiting groove 31121, and there is an included angle between the two side walls of the limiting groove 31121. Through the cooperation of the limiting pin 31144 and the limiting groove 31121, the rotation range of the rotating block 3114 can be limited, preventing the rotating block 3114 from rotating too much and getting stuck with the opening / closing foot 3112, thus affecting the subsequent clamping operation of the lifting lug 4. In this embodiment, the gripper 311 is fixed on a rotating shaft, which drives the lifting lug 4 to rotate, so that the welding torch on the welding torch robot can weld and fix the various positions of the lifting lug 4 to be welded. It can be understood that the parts to be fixed by welding the lifting lug 4 can be pre-fixed by snap-fit, plug-in or other methods, and then welded by welding station 31. The welding torch robot is located on one side of the gripper 311. In this embodiment, a sensor is provided on one side of the fixed foot 3111. When the lifting lug 4 moves above the fixed foot 3111, the sensor detects that an object has entered the clamping space 3113, thereby sending a signal to the control system to control the cylinder 3115 to open and close the foot 3112 to clamp the lifting lug 4. The sensor can be a proximity switch, grating or distance sensor, etc. The connection method and operation method of each sensor and the control system are all existing technologies and will not be described in detail here.

[0039] The cutting station 32 includes a support saddle 321 and a cutting robot 323. One side of the support saddle 321 has a clamping cylinder 322, the piston rod of which can move closer to or further away from the side of the support saddle 321. In this embodiment, the width dimension of the support saddle 321 is smaller than the width dimension of the smallest specification of the lifting lug 4 to be processed, so that the support saddle 321 can be used to process lifting lugs 4 of more specifications. The side of the support saddle 321 is perpendicular to its upper surface. During operation, the structure of the side of the lifting lug 4 is placed between the clamping cylinder 322 and the support saddle 321. The clamping cylinder 322 clamps and fixes the lifting lug 4 to the side of the support saddle 321. Then, the cutting robot 323 cuts the area to be cut of the lifting lug 4 according to a preset trajectory. The area to be cut of the lifting lug 4 can be a damaged area that needs repair, or it can be a welding bevel processing area where the lifting lug 4 is pre-connected to the ship. The cutting equipment can be a welding torch, an angle grinder, or the laser head of a laser cutting device. When it is necessary to cut and repair a damaged lifting lug 4, the lifting lug 4 is placed on the support saddle 321, the piston rod of the clamping cylinder 322 extends to clamp and fix the lifting lug 4, and then the cutting robot 323 cuts the damaged part of the lifting lug 4 for subsequent secondary processing. In this embodiment, a pressure plate is fixed to the end of the piston rod of the clamping cylinder 322. The pressure plate abuts against a preset position of the lifting lug 4, thereby fixing the lifting lug 4 to the support saddle 321. A collection box 324 is provided below the support saddle 321 for collecting waste materials after cutting.

[0040] The feeding section 2 includes a slide table 21, and a placement platform 332 is provided on the slider of the slide table 21. Each placement platform 332 has a support column 3321 and / or a support plate 3322. The support plate 3322 is located on one side of the support column 3321, and the plane of the support plate 3322 is parallel to the axis of the support column 3321. The upper surface of the support plate 3322 is in the same plane as the upper surface of the support column 3321. Through the cooperation of the support column 3321 and the support plate 3322, different specifications of lifting lugs 4 can be stably supported.

[0041] By cooperating with the slide table 21 and the placement table 332, the operator can place the lifting lug 4 on the placement table 332 at one end of the slide table 21. Then, by operating the slide table 21, the lifting lug 4 is brought closer to the movement channel 1, so that the material handling robot 11 can remove the lifting lug 4 from the placement table 332. This allows the operator to stay as far away from the movement channel 1 as possible, avoiding injury to the operator when the material handling robot 11 is handling the material. For example, for the placement table 332, when the lifting lug 4 is small, it is placed on the support column 3321. When the lifting lug 4 is large and a single support column 3321 cannot stably support the lifting lug 4, one or more support plates 3322 are set on the side of the groove of the lifting lug 4. The support plates 3322 support the part of the lifting lug 4 that protrudes more from the support column 3321, so that the lifting lug 4 can be stably positioned on the placement table 332.

[0042] The processing station also includes a storage station 33, which includes multiple placement platforms 332. The specific structure of the placement platforms 332 is the same as that of the placement platforms 332 in the feeding section 2. By setting up the storage station 33, operators can centrally place multiple lifting lugs 4 to be processed into the storage station 33, and then wait for the production line to process them, saving manpower and reducing the labor intensity of operators.

[0043] The storage station 33 includes at least two shelves 331, which are arranged along the height direction. Compared to the upper shelf 331, the lower shelf 331 is closer to the movement channel 1. The placement platform 332 is fixed on the shelf 331. This stepped layout makes it easier for the material handling robot 11 to grab the lugs 4 on the shelves 331 at different heights, and avoids the problem that a single shelf 331 with a large area will be far away from the movement channel 1 on the outer side, which would affect the robot's ability to pick up and place materials at a distance.

[0044] Each shelf 331 has multiple mounting positions, each mounting position having a support column 3321 fixing part and a support piece 3322 fixing part. The placement platform 332 is located at the mounting position, and the support column 3321 fixing part corresponds to the support column 3321, and the support piece 3322 fixing part corresponds to the support piece 3322, facilitating the quick positioning and installation of the placement platform 332. This allows operators to adjust the placement platform 332 at each mounting position according to the specifications and quantity of the lifting lugs 4 to be processed. The placement platform 332 in the mounting position can be the same as the placement platform 332 in the feeding section 2, or it can be set differently as needed.

[0045] Preferably, the support column 3321 extends a positioning column 3323 along its own axis, and the top of the positioning column 3323 is higher than the plane where the top of the support piece 3322 is located. When placing the lifting lug 4, the hole on the lifting lug 4 can be fitted onto the positioning column 3323 to achieve rapid positioning of the lifting lug 4 and prevent the lifting lug 4 from shifting on the placement platform 332, which would affect the robot arm's gripping of the lifting lug 4.

[0046] In other embodiments, the motion channel 1 can also be a circular or linear reciprocating layout to adapt to different workshop site requirements; the material handling robot 11 can also be a multi-axis robot to increase the flexibility and range of grasping.

[0047] Example 2

[0048] Based on Embodiment 1, this embodiment can be further developed by including a magnetic suction unit in the material handling robot 11. This magnetic suction unit comprises a magnetic suction head 111, a fixing plate 114, a guide rod 112, and a spring 113. The fixing plate 114 has a through hole through which the guide rod 112 passes. The spring 113 is sleeved on the guide rod 112, with one end of the spring 113 abutting against the magnetic suction head 111 and the other end against the fixing plate 114. When the magnetic suction head 111 attracts and grasps the lifting lug 4, the spring 113 buffers the contact between the lifting lug 4 and the magnetic suction head 111, mitigating potential material fatigue caused by impacts on the magnetic suction unit during prolonged use and improving the equipment's service life. The fixing plate 114 is fixedly connected to the free end of the material handling robot 11. The guide rod 112 can be a bolt with partially smooth sidewalls. The bolt passes through the through hole and is screwed to the magnetic block. The spring 113 is sleeved on the smooth sidewall portion of the bolt, providing guidance for the movement direction of the magnetic block through the cooperation of the smooth sidewall and the through hole. The magnetic block can be a permanent magnet or a magnetically conductive material, and an electromagnet is installed inside it. The way the electromagnet is installed is existing technology in this field and will not be described again.

[0049] Furthermore, the present invention adopts the following technical solution:

[0050] A non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method for compensation control of overhead contact line maintenance vehicles for response delay.

[0051] Furthermore, the present invention adopts the following technical solution:

[0052] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the above-described method for compensating for response delays in overhead contact line maintenance vehicles.

[0053] From the above description of the embodiments, those skilled in the art will clearly understand that the facilities of the present invention can be implemented using software plus necessary general-purpose hardware platforms. Embodiments of the present invention can be implemented using existing processors, or by dedicated processors used for this or other purposes for suitable systems, or by hardwired systems. Embodiments of the present invention also include non-transitory computer-readable storage media, comprising machine-readable media for carrying or having machine-executable instructions or data structures stored thereon; such machine-readable media can be any available medium accessible by a general-purpose or special-purpose computer or other machine with a processor. For example, such machine-readable media can include RAM, ROM, EPROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store the required program code in the form of machine-executable instructions or data structures and is accessible by a general-purpose or special-purpose computer or other machine with a processor. When information is transmitted or provided to a machine via a network or other communication connection (hardwired, wireless, or a combination of hardwired and wireless), that connection is also considered a machine-readable medium.

[0054] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A lifting lug and secondary utilization production line, characterized in that: The system includes a motion channel and a material handling robot that moves along the motion channel. One end of the motion channel is equipped with a feeding section, and multiple processing stations are provided on both sides of the motion channel along the direction of the robot's movement. The processing stations include welding stations and cutting stations. Through the welding stations and cutting stations, the welding production of lifting lugs and the cutting of damaged lifting lugs can be realized in one production line, so as to facilitate the recycling and reprocessing of the damaged lifting lugs. The welding station includes a gripper and a welding gun robot. The gripper includes a fixed foot and an opening / closing foot, with a clamping space between the fixed foot and the opening / closing foot. The end of the opening / closing foot can approach or move away from the fixed foot to achieve clamping and releasing of the lifting lug to be processed. The cutting station includes a support saddle and a cutting robot. One side of the support saddle has a clamping cylinder, and the piston rod of the clamping cylinder can approach or move away from the side of the support saddle.

2. The lifting lug and secondary utilization production line according to claim 1, characterized in that: Along a direction perpendicular to the ground, the fixed foot is located below the opening and closing foot, and the end of the opening and closing foot has a rotating block. The rotating block includes a rotating part and a gravity part. The rotating part is rotatably connected to the opening and closing foot, and the gravity part is located in the clamping space, and the gravity part has a clamping surface facing the fixed foot.

3. The lifting lug and secondary utilization production line according to claim 2, characterized in that: The fixed foot extends vertically upward from both sides, and the opening and closing foot is rotatably connected to the hinge ear in the middle. The cylinder body of a cylinder is fixed on the fixed foot, and the piston rod is hinged to the end of the opening and closing foot away from the rotating block.

4. The lifting lug and secondary utilization production line according to claim 2, characterized in that: The opening and closing foot has a limiting groove near the end of the rotating block. The rotating block has a limiting pin, which is located in the limiting groove. The rotation axis of the rotating block is located on the plane where the two sides of the limiting groove are located, and there is an included angle between the two sides of the limiting groove.

5. The lifting lug and secondary utilization production line according to claim 1, characterized in that: The material handling robot includes a magnetic suction unit, which includes a magnetic suction head, a fixed plate, a guide rod, and a spring. The spring is sleeved on the guide rod, the fixed plate has a through hole, the guide rod passes through the through hole, one end of the spring abuts against the magnetic suction head, and the other end abuts against the fixed plate.

6. The lifting lug and secondary utilization production line according to claim 1, characterized in that: The feeding section includes a slide table, and a placement platform is provided on the slider of the slide table. Each placement platform has a support column and / or a support plate. The support plate is located on one side of the support column, and the plane of the support plate is parallel to the axis of the support column. The upper surface of the support plate is on the same plane as the upper surface of the support column.

7. The lifting lug and secondary utilization production line according to claim 1, characterized in that: The processing station also includes a storage station, which includes multiple placement platforms. Each placement platform has a support column and / or a support plate. The support plate is located on one side of the support column, and the plane of the support plate is parallel to the axis of the support column. The upper surface of the support plate is on the same plane as the upper surface of the support column.

8. The lifting lug and secondary utilization production line according to claim 7, characterized in that: The storage station includes at least two shelves, and multiple shelves are arranged along the height direction. Compared with the upper shelf, the lower shelf is closer to the movement channel, and the anti-blocking platform is fixed on the shelf.

9. The lifting lug and secondary utilization production line according to claim 8, characterized in that: Each of the aforementioned shelves has multiple mounting positions, and each mounting position has a support column fixing part and a support plate fixing part. The placement platform is located at the mounting position, and the support column fixing part can correspond to the support column, and the support plate fixing part can correspond to the support plate.

10. A lifting lug and secondary utilization production line according to any one of claims 6-9, characterized in that: The support column extends a positioning column along its own axis, and the top of the positioning column is higher than the plane where the top of the support piece is located.