Assembly line for jack oil cylinder and assembly method of assembly line

Abstract

The invention relates to the technical field of hydraulic support jack assembling, in particular to an assembling production line for a jack oil cylinder and an assembling method of the assembling production line. The assembling production line comprises a cylinder barrel feeding device, a cylinder barrel demagnetizing and cleaning device, a piston rod feeding device, a piston rod demagnetizing and cleaning device, a piston rod assembly assembling device, a vertical assembling device, a testing device and an off-line stacking device which are sequentially arranged in the direction from the upstream to the downstream of the production line, and further comprises a conveying device. The whole assembling process from feeding of the cylinder barrel and the piston rod to assembling of the jack oil cylinder to discharging is automatic, manual intervention is reduced, the production takt time of the whole line is 5 minutes per piece, and the production efficiency is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic support jack assembly, and particularly to an assembly production line and an assembly method for a jack oil cylinder. Background Art

[0002] The hydraulic support jack oil cylinder is a core component of a coal mine hydraulic support, mainly used to support and adjust the height and angle of the hydraulic support to ensure the safety and stability of underground working environments such as coal mines. The traditional assembly process of the jack oil cylinder mainly relies on manual operation. Although this method has a certain degree of flexibility in early production, with the continuous improvement of market requirements for product quality and production efficiency, the limitations of the traditional assembly method have become increasingly prominent.

[0003] The traditional assembly method of the jack oil cylinder mainly has the following disadvantages: (1) Low production efficiency: Due to the limited speed of manual operation and being easily affected by factors such as worker proficiency and fatigue, the overall assembly efficiency is low, making it difficult to meet the requirements of large-scale and batch production; (2) Unstable assembly quality: The quality of manual assembly highly depends on the technical level and operation standardization of workers. Skill differences, operation habits, and working states among different workers will lead to uneven assembly quality; (3) High production cost: The traditional assembly method requires a large number of skilled workers, and a large amount of time and resources are required to train a skilled worker; (4) Poor traceability: The manual assembly process lacks the ability to collect and analyze production data in real time, making it difficult to achieve real-time collection and traceability of assembly data. When quality problems occur in the product, it is impossible to quickly locate the problem link, increasing the difficulty of after-sales maintenance and quality improvement. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the above-mentioned disadvantages and deficiencies of the prior art, the present invention provides an assembly production line and an assembly method for a jack oil cylinder, which solve the technical problems such as low assembly production efficiency, unstable assembly quality, and high production cost of the jack oil cylinder.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the main technical solutions adopted by the present invention include:

[0008] In a first aspect, an embodiment of the present invention provides an assembly production line for a jack cylinder, including a cylinder barrel loading device, a cylinder barrel demagnetization and cleaning device, a piston rod loading device, a piston rod demagnetization and cleaning device, a piston rod assembly assembling device, a vertical assembling device, a testing device, and a offline palletizing device arranged in sequence from the upstream to the downstream of the production line. It further includes a conveying device. Among them, the piston rod assembly assembling device includes a piston rod pre-assembling mechanism and a piston punching and tightening mechanism arranged in sequence from the upstream to the downstream of the production line; the cylinder barrel loading device is used to send the cylinder barrel to the cylinder barrel demagnetization and cleaning device; the cylinder barrel demagnetization and cleaning device is used to demagnetize and clean the cylinder barrel; the piston rod loading device is used to send the piston rod to the piston rod demagnetization and cleaning device; the piston rod demagnetization and cleaning device is used to demagnetize and clean the piston rod; the piston rod pre-assembling mechanism is used to pre-sleeve a guide sleeve and a piston on the demagnetized and cleaned piston rod to form a piston rod assembly; the piston punching and tightening mechanism is used to tighten the piston in the piston rod assembly, punch holes in the piston, and fix the piston and the piston rod with screws; the vertical assembling device is used to align and assemble the demagnetized and cleaned cylinder barrel with the piston rod in the piston rod assembly and tighten the guide sleeve to form a jack cylinder; the testing device is used to detect the pressure resistance and sealing performance of the jack cylinder; the offline palletizing device is used to take the qualified jack cylinder offline and stack it; the conveying device is used to convey the piston rod at the piston rod demagnetization and cleaning device to the piston rod assembly assembling device, convey the piston rod assembly at the piston rod pre-assembling mechanism to the piston punching and tightening mechanism, and convey the cylinder barrel at the cylinder barrel demagnetization and cleaning device to the vertical assembling device.

[0009] Preferably, both the cylinder barrel demagnetization and cleaning device and the piston rod demagnetization and cleaning device include a demagnetizer and a high-pressure spray cleaning machine arranged adjacent to each other in the direction from the upstream to the downstream of the production line, and further include a conveying mechanism; the high-pressure spray cleaning machine includes a spray cleaning chamber, a blank space chamber, a spray rinsing chamber, and a drying chamber arranged adjacent to each other in sequence; the conveying mechanism includes a conveying chain and a plurality of V-shaped support frames, and the plurality of V-shaped support frames are arranged at intervals on the conveying chain for placing the cylinder barrel or the piston rod. The conveying chain sequentially passes through the demagnetizer, the spray cleaning chamber, the blank space chamber, the spray rinsing chamber, and the drying chamber to convey the cylinder barrel and the piston rod for demagnetization and cleaning in sequence.

[0010] Preferably, the piston punching and tightening mechanism includes an operation platform, a piston tightening assembly, a punching assembly, a support and clamping assembly, a first anti-rotation assembly arranged at intervals and all movably on the operation platform, and a screw locking assembly arranged on one side of the operation platform; the support and clamping assembly is used to clamp the piston rod and adjust the central axis height of the piston rod, the first anti-rotation assembly is used to prevent the rotation of the piston rod to be processed, the piston tightening assembly is used to screw the piston pre-sleeved on the piston rod, the punching assembly can move in the vertical direction to punch holes in the tightened piston, and the screw locking assembly is used to lock the piston screws.

[0011] Preferably, the screw locking assembly includes a glue application unit, a locking unit, and a screw feeding unit; the glue application unit and the locking unit are arranged adjacent to each other at an interval and are located directly above the punching assembly, and the screw feeding unit is connected to the side end on the operation platform.

[0012] Preferably, the vertical assembling device includes a processing platform, a support frame, a rotating assembly, a second anti-rotation assembly, a first clamping assembly, a second clamping assembly, a third anti-rotation assembly, and a guide sleeve tightening assembly; the processing platform and the support frame are connected by the rotating assembly, and the rotating assembly can drive the processing platform to rotate ° along the length direction of the processing platform; the second anti-rotation assembly, the first clamping assembly, the second clamping assembly, and the third anti-rotation assembly are arranged at intervals in sequence and are all movably arranged on the processing platform, and both the second anti-rotation assembly and the first clamping assembly can be lifted to adjust the central axis height of the piston rod; the guide sleeve tightening assembly is movably arranged on the support frame.

[0013] Preferably, the processing platform is of a stepped type; the second anti-rotation assembly and the first clamping assembly are arranged at intervals in sequence and are all movably arranged on the lower-level processing platform; the second clamping assembly and the third anti-rotation assembly are arranged at intervals in sequence and are all movably arranged on the higher-level processing platform.

[0014] Preferably, the testing device includes a testing console and a plurality of test benches, the plurality of test benches are adjacent and arranged at intervals, the testing console is arranged on one side of the plurality of test benches, and the testing console controls the plurality of test benches to test the jack cylinder.

[0015] Preferably, the conveying device includes a truss mechanism, and the truss mechanism is arranged directly above the piston rod assembly device, the vertical assembling device, and the testing device; the truss mechanism includes a first truss unit and a second truss unit, the first truss unit is arranged directly above the piston rod pre-assembly mechanism, and the second truss unit is arranged directly above the piston punching and tightening mechanism, the vertical assembling device, and the testing device; the first truss unit includes a third gantry truss and a third manipulator movably arranged on the top of the third gantry truss; the second truss unit includes a fourth gantry truss, a fourth manipulator and a fifth manipulator arranged at intervals in sequence and all movably arranged on the top of the fourth gantry truss.

[0016] Preferably, the conveying device further includes a conveying mechanism, the input end of the conveying mechanism is connected to the discharge end of the cylinder degaussing and cleaning device, and the output end of the conveying mechanism is connected to the feeding end of the vertical assembling device to convey the cleaned cylinder to the vertical assembling device for assembly.

[0017] In a second aspect, an assembling method for a jack cylinder, using an assembling production line for a jack cylinder, successively includes the following steps:

[0018] S1. Workpiece feeding: The cylinder feeding device and the piston rod feeding device respectively send the cylinder and the piston rod to the feeding ends of the cylinder degaussing and cleaning device and the piston rod degaussing and cleaning device;

[0019] S2. Degaussing and cleaning: The cylinder degaussing and cleaning device and the piston rod degaussing and cleaning device are used to degauss and clean the cylinder and the piston rod respectively;

[0020] S3. Pre-assembling the piston rod assembly: The cleaned piston rod is conveyed to the feeding end of the piston rod pre-assembling mechanism through the conveying device, and the piston rod pre-assembling mechanism is used to pre-sleeve the guide sleeve and the piston on the piston rod to form a piston rod assembly;

[0021] S4. Drilling and tightening the piston: The pre-assembled piston rod assembly is conveyed to the piston drilling and tightening mechanism through the conveying device, and the piston drilling and tightening mechanism is used to tighten the piston in the piston rod assembly, drill holes in the piston and fix the piston and the piston rod with screws;

[0022] S5. Assembling together: The cleaned cylinder is conveyed to the vertical assembling device through the conveying device, and the assembled piston rod assembly is conveyed to the vertical assembling device through the conveying device. The vertical assembling device aligns and assembles the piston rod in the cylinder and the piston rod assembly and tightens the guide sleeve to form a jack cylinder;

[0023] S6. Testing: The assembled jack cylinder is conveyed to the feeding end of the testing device through the truss mechanism, and the testing device is used to test the pressure resistance and sealing performance of the jack cylinder;

[0024] S7. Off-line: The qualified jack cylinders are off-line and stacked through the off-line palletizing device.

[0025] (III) Beneficial effects

[0026] The beneficial effects of the present invention are as follows:

[0027] For the assembly production line and its assembly method for the jack cylinder of the present invention, since the assembly production line for the jack cylinder includes a cylinder feeding device, a cylinder degaussing and cleaning device, a piston rod feeding device, a piston rod degaussing and cleaning device, a piston rod assembly assembling device, a vertical assembling device, a testing device and an off-line palletizing device which are sequentially arranged along the upstream to downstream direction of the production line, and also includes a conveying device, from the feeding of the cylinder and the piston rod to the off-line of the assembled jack cylinder, the whole assembly process is automated, reducing manual intervention. The production cycle of the whole line is 5 minutes per piece, significantly improving the production efficiency.

[0028] Since the cylinder degaussing and cleaning device and the piston rod degaussing and cleaning device can remove the magnetic fields generated during the manufacturing, welding, heat treatment, or machining of the cylinder and the piston rod, avoid the residual magnetic fields from attracting iron filings or other tiny metal particles, improve the cleanliness and reliability of the hydraulic system, and thus enhance the working performance of the jack cylinder.

[0029] The piston rod assembly device includes a piston rod pre-assembly mechanism and a piston hole punching and tightening mechanism arranged in sequence from the upstream to the downstream of the production line. It is applicable to assemble the piston rod assembly. With only two mechanisms, the piston rod assembly can be completed, which not only reduces the floor area and shortens the waiting time at the workstations, but also improves the assembly quality of the piston rod assembly. At the same time, it reduces the transfer times of the piston rod and improves the assembly efficiency of the piston rod assembly.

[0030] The vertical assembly device for aligning and assembling the cylinder and the assembled piston rod integrates the cylinder-piston rod assembly and the tightening of the guide sleeve, reduces the transfer times of the workpieces, and further improves the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a top view schematic diagram of the assembly production line for the hydraulic jack cylinder of the present invention;

[0032] Figure 2 It is a partial cross-sectional schematic diagram of the jack cylinder;

[0033] Figure 3 It is a cross-sectional schematic diagram of the piston;

[0034] Figure 4 It is a cross-sectional schematic diagram of the cylinder degaussing and cleaning device;

[0035] Figure 5 It is a structural schematic diagram of the piston hole punching and tightening mechanism;

[0036] Figure 6 It is a top view schematic diagram of the piston hole punching and tightening mechanism;

[0037] Figure 7 It is a structural schematic diagram of the punching component of the piston hole punching and tightening mechanism;

[0038] Figure 8 It is a structural schematic diagram of the vertical assembly device;

[0039] Figure 9 It is a top view schematic diagram of the vertical assembly device;

[0040] Figure 10 It is a top view schematic diagram of the piston rod pre-assembly mechanism. DETAILED DESCRIPTION OF THE INVENTION

[0041] For better explaining the present invention for easy understanding, the present invention will be described in detail below in conjunction with the accompanying drawings through specific embodiments.

[0042] Embodiment 1:

[0043] As Figure 1 shown, this embodiment provides an assembly production line for a jack cylinder. The assembly production line includes a cylinder barrel loading device 1, a cylinder barrel demagnetization and cleaning device 2, a piston rod loading device 3, a piston rod demagnetization and cleaning device 4, a piston rod assembly device 5, a vertical assembly device 6, a testing device 7, and a offline palletizing device 8, which are arranged in sequence along the upstream to downstream direction of the production line. It also includes a conveying device 9 and a control system. From the loading of the cylinder barrel a and the piston rod b to the offline of the assembled jack cylinder, the entire assembly process is automated, reducing manual intervention. The production cycle of the whole line is 5 minutes per piece, significantly improving the production efficiency.

[0044] As Figure 1 shown, the cylinder barrel loading device 1 includes a first gantry truss 11 and a first manipulator 12. The first manipulator 12 is movably arranged on the top of the first gantry truss 11. The cylinder barrel a for forming the jack cylinder is stored directly below the first gantry truss 11. The first manipulator 12 grabs the cylinder barrel a to be processed and conveys the cylinder barrel a along the upstream to downstream direction of the production line to the feeding end of the cylinder barrel demagnetization and cleaning device 2 by moving on the top of the first gantry truss 11. Of course, in other embodiments, other conveying methods can also be used to convey the cylinder barrel a from the storage station to the cylinder barrel demagnetization and cleaning device 2.

[0045] As Figure 1 shown, the piston rod loading device 3 includes a second gantry truss 31 and a second manipulator 32. The second manipulator 32 is movably arranged on the top of the second gantry truss 31. The piston rod b for forming the jack cylinder is stored directly below the second gantry truss 31. The second manipulator 32 grabs the piston rod b to be processed and conveys the piston rod b along the upstream to downstream direction of the production line to the feeding end of the piston rod demagnetization and cleaning device 4 by moving on the top of the second gantry truss 31. Of course, in other embodiments, other conveying methods can also be used to convey the piston rod b from the storage station to the piston rod demagnetization and cleaning device 4.

[0046] As Figure 4 shown, both the cylinder barrel demagnetization and cleaning device 2 and the piston rod demagnetization and cleaning device 4 include a demagnetizer 21, a high-pressure spray cleaning machine 22, and a conveying mechanism 23 that are adjacent to each other along the upstream to downstream direction of the production line. The conveying mechanism 23 sequentially passes through the demagnetizer 21 and the high-pressure spray cleaning machine 22. For simplicity of description, the functions of each mechanism are uniformly described below. It can be understood that each mechanism in the cylinder barrel demagnetization and cleaning device 2 and the piston rod demagnetization and cleaning device 4 respectively corresponds to the cylinder barrel a and the piston rod b.

[0047] In order to remove oil and impurities on the surface of cylinder a / piston rod b, Figure 4 As shown, the high-pressure spray cleaning machine 22 includes a spray cleaning chamber 221, an empty chamber 222, a spray rinsing chamber 223 and a blow-drying chamber 224 which are arranged adjacent to each other in sequence. The spray cleaning chamber 221, the empty chamber 222, the spray rinsing chamber 223 and the blow-drying chamber 224 are each an independent chamber, but the inlets and outlets are connected to each other.

[0048] In order to ensure that the cylinder a / piston rod b remains stable during the transmission process, avoid deviation or sliding, and ensure the continuity and safety of the transmission process, such as Figure 4 As shown, the conveying mechanism 23 includes a conveying chain 231 and a plurality of V-shaped support frames 232. The plurality of V-shaped support frames 232 are arranged at intervals on the conveying chain 231 for placing the cylinder a / piston rod b. The conveying chain 231 passes through the demagnetizer 21, the spray cleaning chamber 221, the empty chamber 222, the spray rinsing chamber 223 and the drying chamber 224 in sequence to convey the cylinder a / piston rod b for demagnetization and cleaning in sequence.

[0049] Among them, the demagnetizer 21 can remove the magnetic field generated by the cylinder a / piston rod b during manufacturing, welding, heat treatment or machining, and prevent the residual magnetic field from absorbing iron filings or other tiny metal particles, so as to improve the cleanliness and reliability of the hydraulic system, thereby improving the working performance of the jack cylinder.

[0050] The spray cleaning chamber 221 uses cleaning liquid (such as water, cleaning agent) to spray to clean impurities such as oil, iron cuttings, dust, etc. on the surface of the cylinder a / piston rod b. The empty chamber 222 is used as a transition area for the short stay of the cylinder a / piston rod b and to ensure that the cleaning liquid drips fully to improve the cleaning effect. The spray rinsing chamber 223 uses clean water to spray to rinse the cylinder a / piston rod b to remove the cleaning liquid and impurities remaining on the surface of the workpiece. The drying chamber 224 uses a high-pressure airflow (such as compressed air) to dry the moisture on the surface of the cylinder a / piston rod b to ensure that the surface of the cylinder a / piston rod b is dry to avoid corrosion or quality problems caused by residual moisture.

[0051] like Figure 1 As shown, the piston rod assembly assembly device 5 includes a piston rod pre-assembly mechanism 51 and a piston drilling and tightening mechanism 52 arranged in sequence from upstream to downstream of the production line, and is used to assemble the piston rod assembly. The piston rod b can be assembled with only two stations, which not only reduces the floor space and shortens the waiting time of the stations, but also improves the assembly quality of the piston rod assembly.

[0052] The piston rod pre-assembly mechanism 51 is used to pre-sleeve the guide sleeve d and the piston c on the demagnetized and cleaned piston rod b to form a piston rod assembly. Figure 10As shown, the piston rod pre-installation mechanism 51 includes a transmission assembly 511, a mounting frame 512, a rear push assembly 513, a material pushing assembly 514, a centering clamping assembly 515 and a material loading assembly 516. The piston rod pre-installation mechanism 51 can quickly and accurately pre-install the guide sleeve d and the piston c on the piston rod b, reducing manual operation time.

[0053] like Figure 10 As shown, the loading assembly 516 is arranged on one side of the conveying assembly 511, and the loading assembly 516 is used to pre-sleeve the guide sleeve d and the piston c on the piston rod b in sequence. The conveying assembly 511 is arranged directly below the mounting frame 512, and the rear ejector assembly 513, the pusher assembly 514 and the centering clamping assembly 515 are all movably arranged on the mounting frame 512 in the vertical direction from upstream to downstream of the production line. The conveying assembly 511 includes a conveyor belt and a plurality of support brackets, and the plurality of support brackets are arranged at intervals on the conveyor belt to support the piston rod b, and the conveyor belt conveys the piston rod b in the direction from upstream to downstream of the production line.

[0054] like Figure 10 As shown, the rear top assembly 513 includes a first sliding block and a top plate connected to each other. The first sliding block is movably arranged on the mounting frame 512. The side end of the top plate is used to support the tail of the piston rod b to prevent the piston rod b from moving when pushing the guide sleeve d. The push assembly 514 includes a second sliding block and a push plate connected to each other. The second sliding block is movably arranged on the mounting frame 512. The side end of the push plate is used to push the guide sleeve d to a specified position. The centering clamping assembly 515 includes a third moving block and two clamping blocks. The two clamping blocks are symmetrically arranged and both connected to the third moving block. The two clamping blocks can move toward or away from each other to clamp or release the piston rod b. The third moving block is movably arranged on the mounting frame 512.

[0055] like Figure 10 As shown, the loading assembly 516 includes a loading robot 5161, a piston docking position 5162, a guide sleeve docking position 5163 and a buffer table 5164. The piston docking position 5162, the guide sleeve docking position 5163 and the buffer table 5164 are arranged along the circumferential direction of the loading robot 5161. The loading robot 5161 can accurately grasp guide sleeves d and pistons c of different models, and pre-sleeve the guide sleeves d and pistons c on the piston rod. It should be noted that the loading robot 5161 involved in this application is prepared using existing technology and will not be repeated here.

[0056] In summary, the specific working process of the piston rod pre-assembly mechanism 51 according to the above structure is as follows: First, the piston rod b to be processed is placed on the conveying component 511, and the rear pushing component 513 moves to the tail of the piston rod b to hold the tail of the piston rod b; then, the loading robot 5161 grabs the guide sleeve d at the guide sleeve connection position 5163 and sleeves the guide sleeve d onto the end of the piston rod b, and the material pushing component 514 pushes the guide sleeve d to the designated position; then, the conveying component 511 transports the piston rod to directly below the centering and clamping component 515, the centering and clamping component 515 clamps the piston rod b, and the loading robot 5161 grabs the piston c at the piston connection position 5162 and sleeves the piston c onto the end of the piston rod b; finally, the centering and clamping component 515 releases the piston rod b, completing the assembly of the piston rod assembly.

[0057] As Figure 5 and Figure 6 shown, the piston drilling and tightening mechanism 52 includes an operation platform 521, a piston tightening component 522, a drilling component 523, a support and clamping component 524, a first anti-rotation component 525 that are sequentially spaced apart and movably arranged on the operation platform 521, and a screw locking component 526 arranged on one side of the operation platform 521. In order to reduce the floor area of the production line, the length direction of the operation platform 521 is perpendicular to the direction from the upstream to the downstream of the production line.

[0058] As Figure 5 shown, the support and clamping component 524 includes a support and clamping unit 5241 and a support unit 5242. The support and clamping unit 5241 and the support unit 5242 are respectively used to support both ends of the piston rod b to be processed, so as to hold up the piston rod b and make the axis of the piston rod b horizontal.

[0059] Specifically, the support and clamping unit 5241 includes a first support member 52411, a first lifting rod 52412, and a pressing member 52413. The first support member 52411 is movably disposed on the operation platform 521 in the vertical direction from the upstream to the downstream of the production line. The first lifting rod 52412 penetrates through the first support member 52411, and the first lifting rod 52412 can drive the first support member 52411 to move up and down in the vertical direction. The bottom of the pressing member 52413 is connected to one side of the top of the first support member 52411, and the pressing member 52413 can move vertically downward to clamp the piston rod b to be processed together with the first support member 52411. The support unit 5242 includes a second support member 52421 and a second lifting rod 52422. The second support member 52421 is movably disposed on the operation platform 521 in the vertical direction from the upstream to the downstream of the production line. The second lifting rod 52422 penetrates through the second support member 52421, and the second lifting rod 52422 can drive the second support member 52421 to move up and down in the vertical direction. To meet the assembly of piston rods b of different specifications, the first support member 52411 and the second support member 52421 can both move up and down together to make the axis of the piston rod b horizontal.

[0060] It should be noted that the structures of the support and clamping unit 5241 and the support unit 5242 are similar. There is no pressing member 52413 on the support unit 5242, and the rest of the structures are the same.

[0061] As Figure 5 shown, the first anti-rotation assembly 525 includes two first sliders 5251 and two first trunnion clamping members 5252 that are connected in one-to-one correspondence. The two first sliders 5251 can drive the two first trunnion clamping members 5252 to move towards or away from each other to clamp or release the piston rod trunnion b1, thereby preventing the rotation of the piston rod b.

[0062] As Figure 5 shown, the piston tightening assembly 522 includes a tightening head 5221 and a tightening drive motor 5222 that are coaxially arranged. The tightening head 5221 extends towards the direction where the support and clamping unit 5241 is located, and the central axis of the tightening head 5221 is at the same height as the central axis of the first anti-rotation assembly 525 of the first anti-rotation assembly 525.

[0063] Specifically, the tightening head 5221 includes a connecting plate and two cylindrical spring pins. The two spring pins extend towards the end of the piston c and are inserted into two tightening holes at the end of the piston c. Through positioning, fixing, buffering, and guiding functions, the spring pins ensure accurate alignment between the piston c and the tightening head 5221, improving the tightening efficiency and quality of the piston c. The connecting plate is provided with a moving chute in the horizontal direction, and the two spring pins can slide in the moving chute to adapt to pistons c of different specifications. The tightening drive motor 5222 can drive the connecting plate to rotate, thereby tightening the piston c pre-sleeved on the piston rod b.

[0064] As Figure 7 shown, the drilling assembly 523 includes a drill bit 5231 and a chip collection box 5232. The drill bit 5231 can vertically expand and contract to drill the tightened piston c. The chip collection box 5232 is connected to the bottom of the drill bit 5231, and the chip collection box 5232 can move vertically together with the drill bit 5231 to ensure a clean assembly environment and prevent chips from affecting the assembly quality.

[0065] As Figure 5 and Figure 6 shown, the screw locking assembly 526 includes a glue application unit 5261, a locking unit 5262, and a screw feeding unit 5263. The glue application unit 5261 and the locking unit 5262 are adjacent and spaced apart and are located directly above the drilling assembly 523. The glue application unit 5261 includes two vertically arranged and parallel glue application heads for applying thread glue to the piston hole. The locking unit 5262 includes two vertically arranged and parallel screw locking heads, and the two screw locking heads correspond to the two glue application heads one by one. After the piston hole is applied with thread glue, screw locking is directly performed to avoid offset of the screw hole position. The screw feeding unit 5263 is connected to the side end of the operation platform 521 and can provide screws c1 for the locking unit 5262.

[0066] To further improve the drilling accuracy, as Figure 6 shown, the piston drilling and tightening mechanism 52 further includes a first detection assembly 527. The first detection assembly 527 includes a longitudinal laser sensor 5271, a transverse laser sensor (not shown in the figure), and a color mark sensor 5272. The longitudinal laser sensor 5271 is located at the side end of the operation platform 521 and is adjacent to the piston tightening assembly 522 for detecting the axial position of the piston c. When the drilling assembly 523 receives the axial position information of the piston c, the control system controls the drill bit 5231 to drill the piston c. The transverse laser sensor is located on the screw locking assembly 526 and detects the radial hole position of the piston c during the rotation of the piston rod b. After the glue application unit 5261 receives the radial hole position information of the piston c, the control system controls the glue application head to move to the corresponding position to apply glue to the piston hole. The color mark sensor 5272 is arranged at the front end of the screw locking assembly 526 and is located at the bottom of the locking unit 5262. The color mark sensor 5272 determines the piston hole position by identifying the color of the thread glue in the piston hole. After the locking unit 5262 receives the piston hole position information, the control system controls the screw locking head to move to the corresponding position to perform screw locking on the piston hole.

[0067] In summary, the working process of the piston drilling and tightening mechanism 52 according to the above structure is as follows: First, place the piston rod assembly on the first support member 52411 and the second support member 52421. Adjust the height of the piston rod b through the first lifting rod 52412 and the second lifting rod 52422 to make the central axis of the piston rod b coincide with the central axis of the tightening head 5221 of the piston tightening assembly 522. The pressing member 52413 and the first support member 52411 jointly clamp the piston rod b. Then, the first anti-rotation assembly 525 moves to the piston rod trunnion b1, and the two first trunnion clamping members 5252 clamp the piston rod trunnion b1 to prevent the rotation of the piston rod b. Subsequently, the support clamping assembly 524 and the first anti-rotation assembly 525 move together to move the end of the piston rod b to the piston tightening assembly 522. The tightening head 5221 fits against the end face of the piston c, and rotates to tighten the piston c. Then, the first anti-rotation assembly 525 releases the piston rod, and the drilling assembly 523 drills the piston c according to the drilling position detected by the longitudinal laser sensor 5271. Finally, the tightening head 5221 drives the piston rod b to rotate 180°. The glue application unit 5261 applies thread glue to the piston hole according to the piston hole position detected by the transverse laser sensor. Then, the locking unit 5262 locks the screw to the piston hole after applying the thread glue according to the piston hole position detected by the color mark sensor 5272, completing the assembly of the piston rod assembly.

[0068] The vertical assembly device 6 is used to align and assemble the cylinder barrel a after demagnetization and cleaning with the piston rod b in the piston rod assembly and tighten the guide sleeve d to form a jack oil cylinder. As Figure 8 and Figure 9 shown, the vertical assembly device 6 includes a processing platform 61, a support frame 62, a rotating assembly 63, a second anti-rotation assembly 64, a first clamping assembly 65, a second clamping assembly 66, a third anti-rotation assembly 67, and a guide sleeve tightening assembly 68. The vertical assembly device 6 integrates the cylinder barrel and piston rod assembly and the tightening of the guide sleeve, reducing the number of workpiece transfers and further improving the assembly efficiency. To reduce the floor area of the production line, the length direction of the processing platform 61 is perpendicular to the direction from the upstream to the downstream of the production line.

[0069] As Figure 9As shown in the figure, the processing platform 61 and the support frame 62 are connected by a rotating assembly 63, and the rotating assembly 63 can drive the processing platform 61 to rotate 90° along the length direction of the processing platform 61. The second anti-rotation assembly 64, the first pair of clamping assemblies 65, the second pair of clamping assemblies 66 and the third anti-rotation assembly 67 are sequentially spaced apart and are all movably arranged on the processing platform 61 in the vertical direction from the upstream to the downstream of the production line. When the processing platform 61 rotates, the second anti-rotation assembly 64 and the first pair of clamping assemblies 65 can centeringly clamp the piston rod b to prevent it from tipping over, and the second pair of clamping assemblies 66 and the third anti-rotation assembly 67 can centeringly clamp the cylinder barrel a to prevent it from tipping over. Among them, both the second anti-rotation assembly 64 and the first pair of clamping assemblies 65 can be lifted and lowered to adjust the central axis height of the piston rod b.

[0070] In order to adapt to cylinder barrels a and piston rods b with different diameters and facilitate adjustment and positioning, as Figure 8 shown, the processing platform 61 is of a stepped type. The second anti-rotation assembly 64 and the first pair of clamping assemblies 65 are sequentially spaced apart and are all movably arranged on the lower-level processing platform 61 in the vertical direction from the upstream to the downstream of the production line for supporting and clamping the piston rod b; the second pair of clamping assemblies 66 and the third anti-rotation assembly 67 are sequentially spaced apart and are all movably arranged on the higher-level processing platform 61 in the vertical direction from the upstream to the downstream of the production line for supporting and clamping the cylinder barrel a. The versatility and flexibility of the vertical assembly device 6 are improved, and it can meet the production requirements of multiple varieties.

[0071] As Figure 8 shown, the second anti-rotation assembly 64 includes two second sliders 641 and two second trunnion clamping parts (not shown in the figure) connected in one-to-one correspondence and a first lifting slider 642 connected to the two second sliders 641. The two second sliders 641 can drive the two second trunnion clamping parts to move towards or away from each other to clamp or release the piston rod trunnion b1, thereby preventing the rotation of the piston rod b. The first lifting slider 642 can slide in the vertical direction to drive the two second trunnion clamping parts to lift and lower.

[0072] As Figure 8 shown, the first pair of clamping assemblies 65 includes a piston rod support unit 651 and a piston rod clamping unit 652. The piston rod support unit 651 and the piston rod clamping unit 652 are movably arranged on the lower-level processing platform 61 in the vertical direction from the upstream to the downstream of the production line. The piston rod support unit 651 and the piston rod clamping unit 652 are respectively used to support both ends of the piston rod b to support the piston rod b and make the axis of the piston rod b horizontal.

[0073] Specifically, the piston rod support unit 651 includes a third support member 6511 and a third lifting rod 6512. The third support member 6511 is movably arranged on the processing platform 61. The third lifting rod 6512 penetrates through the third support member 6511, and the third lifting rod 6512 can drive the third support member 6511 to lift and lower in the vertical direction. The piston rod clamping unit 652 includes a fourth lifting rod 6521 and two first clamping blocks 6522. The top of the fourth lifting rod 6521 is connected to the bottoms of the two first clamping blocks 6522. The fourth lifting rod 6521 can drive the two first clamping blocks 6522 to lift and lower, and the two first clamping blocks 6522 can move towards each other to clamp the piston rod b. Both of the two first clamping blocks 6522 are V-shaped, and the openings of the two first clamping blocks 6522 are arranged opposite to each other to clamp piston rods b of different specifications.

[0074] As Figure 8 shown, the central axis heights of the second anti-rotation assembly 64, the piston rod support unit 651, and the piston rod clamping unit 652 are all the same, and they can all lift and lower together so that the central axis height of the piston rod b is on the same horizontal line as the central axis height of the cylinder barrel a. Through the combined movement of the second anti-rotation assembly 64 and the first clamping assembly 65, the piston rod b can be pushed into the cylinder barrel a, improving the assembly accuracy.

[0075] As Figure 8 shown, the second clamping assembly 66 includes two cylinder barrel clamping units 661. The two cylinder barrel clamping units 661 are both movably arranged on the higher-order processing platform 61 and are used to support and fix both ends of the cylinder barrel a. Specifically, the cylinder barrel clamping unit 661 includes two second clamping blocks 6611. The two second clamping blocks 6611 can move towards each other to clamp the cylinder barrel a. Both of the two second clamping blocks 6611 are V-shaped, and the openings of the two second clamping blocks 6611 are arranged opposite to each other to clamp cylinder barrels a of different specifications.

[0076] As Figure 8 shown, the third anti-rotation assembly 67 includes two third sliders 671 and two third trunnion clamping members 672 that are connected in one-to-one correspondence. The two third sliders 671 can drive the two third trunnion clamping members 672 to move towards each other or away from each other to clamp or release the cylinder barrel trunnion a1, thereby anti-rotating the cylinder barrel a. The central axis heights of the third anti-rotation assembly 67 and the two cylinder barrel clamping units 661 are the same.

[0077] As Figure 8As shown, the guide sleeve tightening assembly 68 is movably arranged on the support frame 62 for tightening the guide sleeve d. The guide sleeve tightening assembly 68 includes a sliding unit 681, a lifting unit 682, and a guide sleeve tightening unit 683. The guide sleeve tightening unit 683 is used to tighten the guide sleeve d. The bottom of the sliding unit 681 is connected to the top of the support frame 62. The side end of the lifting unit 682 is connected to the side end of the sliding unit 681. The sliding unit 681 can drive the lifting unit 682 to move along the transverse direction of the support frame 62. The guide sleeve tightening unit 683 is arranged at the bottom of the lifting unit 682. The lifting unit 682 can drive the guide sleeve tightening unit 683 to lift and lower along the vertical direction.

[0078] To further improve the accuracy of the combined assembly, as Figure 8 shown, the vertical combined assembly device 6 further includes a second detection component 69. The second detection component 69 includes two laser workpiece sensors. The two laser workpiece sensors are respectively arranged on the third anti-rotation component 67 and the guide sleeve tightening unit 683.

[0079] The laser workpiece sensor located on the third anti-rotation component 67 is used to detect the coaxiality of the cylinder barrel a and the piston rod b to ensure accurate alignment during the assembly process. By emitting a light beam and receiving the reflected signal, the position of the cylinder barrel is monitored in real time. The laser workpiece sensor transmits the monitored position data to the control system. The control system adjusts the positions and states of the second anti-rotation component 64, the first clamping component 65, the second clamping component 66, and the third anti-rotation component 67 according to the data.

[0080] The laser workpiece sensor located on the guide sleeve tightening unit 683 is used to detect whether the guide sleeve d rotates. By emitting a light beam and receiving the reflected signal, the position and rotation state of the guide sleeve are monitored in real time to ensure that it remains fixed during the tightening process. And the monitored position and rotation state data are transmitted to the control system. The control system adjusts the position and state of the tightening mechanism according to the data, reducing the adjustment time. Preventing assembly deviation caused by the rotation of the guide sleeve d, improving the assembly quality, improving the tightening efficiency, and shortening the production cycle.

[0081] In summary, the vertical assembly device 6 works according to the above structure as follows: First, the assembled piston rod b and the cleaned cylinder barrel a are respectively placed on the first pair of clamping components 65 and the second pair of clamping components 66; Subsequently, the second anti-rotation component 64 and the third anti-rotation component 67 respectively move to the piston rod trunnion b1 and the cylinder barrel trunnion a1 to prevent the piston rod b and the cylinder barrel a from rotating; Then, adjust the heights of the second anti-rotation component 64 and the first pair of clamping components 65 according to the positions of the cylinder barrel a and the piston rod b detected by the laser detection workpiece sensor located in the third anti-rotation component 67, so that the central axis of the piston rod b coincides with the central axis of the cylinder barrel a; Then, the rotating component 63 drives the processing platform 61 to rotate 90°, and through the combined movement of the second anti-rotation component 64 and the first pair of clamping components 65, the piston rod b is pushed into the cylinder barrel a; Finally, according to the position and rotation state of the guide sleeve detected by the laser detection workpiece sensor located in the guide sleeve tightening unit 683, the guide sleeve d is tightened by the tightening unit 683 to complete the assembly of the jack oil cylinder.

[0082] The test device 7 is used to detect the pressure resistance and sealing performance of the assembled jack oil cylinder, such as Figure 1 shown, the test device 7 includes a test console 71 and a plurality of test benches 72. The plurality of test benches 72 are adjacent and arranged at intervals. The test console 71 is arranged on one side of the plurality of test benches 72, and the test console 71 controls the plurality of test benches 72 to test the jack oil cylinder. The test bench 72 is composed of a unit frame and a test mechanism. The unit frame is used to place the assembled jack oil cylinder, and the test mechanism is used to detect the starting pressure, no-load stroke and high and low pressure sealing performance of the piston rod cavity of the jack oil cylinder.

[0083] The test process only needs to be started with one key, and an automated test process is adopted. During the test, information such as the displacement stroke, test pressure, test time, and telescopic speed of the jack oil cylinder can be automatically monitored and collected. The test process can be freely switched between manual and automatic, which is convenient for operation; Manual testing can operate the test bench 72 through the buttons and knobs on the test console 71; Automatic testing is completed by the program controlling the test bench 72.

[0084] Such as Figure 1 shown, the conveying device 9 is used to convey the piston rod b at the piston rod demagnetization and cleaning device 4 to the piston rod assembly device 5, convey the piston rod assembly at the piston rod pre-assembly mechanism 51 to the piston hole punching and tightening mechanism 52, and convey the cylinder barrel a at the cylinder barrel demagnetization and cleaning device 2 to the vertical assembly device 6.

[0085] Furthermore, the conveying device 9 includes a truss mechanism 91, such as Figure 1As shown in the figure, the truss mechanism 91 is disposed directly above the piston rod assembly device 5, the vertical assembly device 6, and the testing device 7. The truss mechanism 91 includes a first truss unit 911 and a second truss unit 912. The first truss unit 911 is disposed directly above the piston rod pre-assembly mechanism 51, and the second truss unit 912 is disposed directly above the piston drilling and tightening mechanism 52, the vertical assembly device 6, and the testing device 7.

[0086] In order to accurately transfer the workpiece, the first truss unit 911 includes a third gantry truss 9111 and a third manipulator 9112 movably disposed on the top of the third gantry truss 9111. The third manipulator 9112 grabs the cleaned piston rod b and transfers the piston rod b in the upstream to downstream direction of the production line to the piston rod pre-assembly mechanism 51 by moving on the top of the third gantry truss 9111. The second truss unit 912 includes a fourth gantry truss 9121, a fourth manipulator 9122 and a fifth manipulator 9123 which are sequentially spaced apart and movably disposed on the top of the fourth gantry truss 9121. The fourth manipulator 9122 grabs the pre-assembled piston rod b and transfers the piston rod b in the upstream to downstream direction of the production line to the support and clamping assembly 524 of the piston drilling and tightening mechanism 52 by moving on the top of the fourth gantry truss 9121. The fourth manipulator 9122 can also grab the assembled piston rod b and transfer the piston rod b in the upstream to downstream direction of the production line to the first pair of clamping assemblies 65 of the vertical assembly device 6 by moving on the top of the fourth gantry truss 9121. The fifth manipulator 9123 grabs the assembled jack cylinder and transfers the jack cylinder in the upstream to downstream direction of the production line to the feeding end of the testing device 7 by moving on the top of the fourth gantry truss 9121. Of course, in other embodiments, other conveying methods may also be used to convey the piston rod b at the piston rod demagnetization and cleaning device 4 to the piston rod assembly device 5, convey the piston rod assembly at the piston rod pre-assembly mechanism 51 to the piston drilling and tightening mechanism 52, and convey the jack cylinder at the vertical assembly device 6 to the testing device 7.

[0087] As Figure 1 shown, the conveying device 9 further includes a conveying mechanism 92. The input end of the conveying mechanism 92 is connected to the discharging end of the cylinder demagnetization and cleaning device 2, and the output end of the conveying mechanism 92 is connected to the feeding end of the vertical assembly device 6 to convey the cleaned cylinder a to the vertical assembly device 6 in the upstream to downstream direction of the production line for assembly. Of course, in other embodiments, other conveying methods may also be used to convey the cylinder a from the cylinder demagnetization and cleaning device 2 to the vertical assembly device 6.

[0088] As Figure 1As shown, the offline palletizing device 8 is used to unload and stack the qualified jack cylinders. The offline palletizing device 8 includes a fifth gantry truss 81 and a sixth manipulator 82. The sixth manipulator 82 is movably arranged on the top of the fifth gantry truss 81. The area directly below the fifth gantry truss 81 is used to store the jack cylinders. The sixth manipulator 82 grabs the qualified jack cylinders and stacks them directly below the fifth gantry truss 81 by moving along the upstream to downstream direction of the production line on the top of the fifth gantry truss 81. Of course, in other embodiments, other conveying methods can also be used to unload and stack the jack cylinders.

[0089] The control system is a PLC control system, including a data acquisition module and a motion control module. The data acquisition module collects the data of each device in real time, enabling the monitoring, tracing, and data analysis of the production process, thereby improving the management level. The motion control module coordinates the action timing of each device to ensure the efficient, precise, and stable operation of the production process. The sensors of the first detection component 527 and the second detection component 69 can detect the status of each device to trigger corresponding actions.

[0090] Embodiment 2:

[0091] This embodiment provides an assembly method for jack cylinders. Using the production line of Embodiment 1, it sequentially includes the following steps:

[0092] S1. Workpiece feeding: The first manipulator 12 of the cylinder barrel feeding device 1 and the second manipulator 32 of the piston rod feeding device 3 respectively grab the cylinder barrel a and the piston rod b to the feeding ends of the cylinder barrel demagnetization and cleaning device 2 and the piston rod demagnetization and cleaning device 4;

[0093] S2. Demagnetization and cleaning: The cylinder barrel demagnetization and cleaning device 2 and the piston rod demagnetization and cleaning device 4 are used to demagnetize and clean the cylinder barrel a and the piston rod b respectively;

[0094] S3. Pre-assembling the piston rod assembly: The third manipulator 9112 of the truss mechanism 91 transports the cleaned piston rod b to the feeding end of the piston rod pre-assembling mechanism 51. The piston rod pre-assembling mechanism 51 pre-sleeves the guide sleeve d and the piston c on the piston rod b to form a piston rod assembly. For the specific working process of the piston rod pre-assembling mechanism 51, refer to the description in Embodiment 1 and will not be elaborated here;

[0095] S4. Piston punching and tightening: The fourth manipulator 9122 of the truss mechanism 91 transports the pre-assembled piston rod assembly to the piston punching and tightening mechanism 52. The piston punching and tightening mechanism 52 punches and tightens the piston c in the piston assembly and fixes the piston c and the piston rod b with screws c1. For the specific working process of the piston punching and tightening mechanism 52, refer to the description in Embodiment 1 and will not be elaborated here;

[0096] S5. Assembly: The cleaned cylinder barrel a is conveyed to the vertical assembly device 6 through the conveying mechanism 92, and the assembled piston rod b is conveyed to the vertical assembly device 6 through the fourth manipulator 9122 of the truss mechanism 91. The vertical assembly device 6 aligns and assembles the piston rod b in the cylinder barrel and piston rod assembly and tightens the guide sleeve d to form a jack cylinder to complete the assembly. For the specific working process of the vertical assembly device 6, refer to the description in Embodiment 1 and will not be elaborated here;

[0097] S6. Detection: The assembled jack cylinder is conveyed to the feeding end of the testing device 7 through the fifth manipulator 9123 of the truss mechanism 91, and the testing device 7 is used to test the pressure resistance and sealing performance of the jack cylinder;

[0098] S7. Off-line: The qualified jack cylinders are off-line and stacked through the off-line palletizing device 8.

[0099] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0100] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0101] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An assembly line for jack cylinders, characterized in that: The invention comprises a cylinder feeding device (1), a cylinder demagnetizing and cleaning device (2), a piston rod feeding device (3), a piston rod demagnetizing and cleaning device (4), a piston rod assembly device (5), a vertical assembly device (6), a testing device (7) and an offline stacking device (8) which are sequentially arranged in the direction from upstream to downstream of the production line, and also comprises a conveying device (9), wherein the piston rod assembly device (5) comprises a piston rod pre-assembly mechanism (51) and a piston drilling and tightening mechanism (52) which are sequentially arranged in the direction from upstream to downstream of the production line; The cylinder barrel feeding device (1) is used to feed the cylinder barrel to the cylinder barrel demagnetization cleaning device (2); The cylinder barrel demagnetization and cleaning device (2) is used to demagnetize and clean the cylinder barrel; The piston rod feeding device (3) is used to feed the piston rod to the piston rod demagnetizing and cleaning device (4); The piston rod demagnetizing and cleaning device (4) is used to demagnetize and clean the piston rod; The piston rod pre-installation mechanism (51) is used to pre-install the guide sleeve and the piston on the demagnetized and cleaned piston rod to form a piston rod assembly; The piston punching and tightening mechanism (52) is used to tighten the piston in the piston rod assembly, punch holes in the piston and fix the piston and the piston rod by screws; The vertical assembly device (6) is used to align and assemble the cylinder barrel after demagnetization and cleaning with the piston rod in the piston rod assembly and tighten the guide sleeve to form a jack cylinder; The testing device (7) is used to detect the pressure bearing and sealing properties of the jack cylinder; The offline stacking device (8) is used to offline and stack the jack oil cylinders that have passed the inspection; the conveying device (9) is used to convey the piston rod at the piston rod demagnetization cleaning device (4) to the piston rod assembly assembly device (5), to convey the piston rod assembly at the piston rod pre-assembly mechanism (51) to the piston drilling and tightening mechanism (52), and to convey the cylinder barrel at the cylinder barrel demagnetization cleaning device (2) to the vertical assembly device (6).

2. The assembly line for jack cylinders according to claim 1, characterized in that: The cylinder demagnetization cleaning device (2) and the piston rod demagnetization cleaning device (4) both include a demagnetizer (21) and a high-pressure spray cleaning machine (22) arranged adjacent to each other in a direction from upstream to downstream of the production line, and also include a conveying mechanism (23); The high-pressure spray cleaning machine (22) comprises a spray cleaning chamber (221), an empty chamber (222), a spray rinsing chamber (223) and a drying chamber (224) which are arranged adjacent to each other in sequence; The conveying mechanism (23) comprises a conveying chain (231) and a plurality of V-shaped support frames (232). The plurality of V-shaped support frames (232) are arranged at intervals on the conveying chain (231) and are used to place cylinder barrels or piston rods. The conveying chain (231) sequentially passes through the demagnetizer (21), the spray cleaning chamber (221), the vacant chamber (222), the spray rinsing chamber (223) and the drying chamber (224) to convey the cylinder barrels and piston rods for demagnetization and cleaning in sequence.

3. The assembly line for jack cylinders according to claim 1, characterized in that: The piston drilling and tightening mechanism (52) comprises an operating platform (521), a piston tightening assembly (522) which is sequentially spaced and movably arranged on the operating platform (521), a drilling assembly (523), a supporting clamping assembly (524), a first anti-rotation assembly (525), and a screw locking assembly (526) arranged on one side of the operating platform (521); The support clamping assembly (524) is used to clamp the piston rod and adjust the height of the center axis of the piston rod, the first anti-rotation assembly (525) is used to stop the piston rod to be processed, the piston tightening assembly (522) is used to screw the piston pre-sleeved on the piston rod, the punching assembly (523) can move in the vertical direction to punch holes in the tightened piston, and the screw locking assembly (526) is used to screw the piston.

4. The assembly line for jack cylinders according to claim 3, characterized in that: The screw locking assembly (526) includes a gluing unit (5261), a locking unit (5262) ​​and a screw feeding unit (5263); The gluing unit (5261) and the locking unit (5262) ​​are arranged adjacent to each other and are located directly above the punching assembly (523), and the screw feeding unit (5263) is connected to the side end on the operating platform (521).

5. The assembly line for jack cylinders according to claim 1, characterized in that: The vertical assembly device (6) comprises a processing platform (61), a support frame (62), a rotating assembly (63), a second anti-rotation assembly (64), a first pair of clamping assemblies (65), a second pair of clamping assemblies (66), a third anti-rotation assembly (67) and a guide sleeve tightening assembly (68); The processing platform (61) and the support frame (62) are connected via a rotating assembly (63), and the rotating assembly (63) can drive the processing platform (61) to rotate 90 degrees along the length direction of the processing platform (61); The second anti-rotation assembly (64), the first pair of clamping assemblies (65), the second pair of clamping assemblies (66) and the third anti-rotation assembly (67) are sequentially spaced and movably arranged on the processing platform (61); the second anti-rotation assembly (64) and the first pair of clamping assemblies (65) can be raised and lowered to adjust the height of the central axis of the piston rod; The guide sleeve tightening assembly (68) is movably arranged on the support frame (62).

6. The assembly line for jack cylinders according to claim 5, characterized in that: The processing platform (61) is a stepped type; The second anti-rotation component (64) and the first pair of clamping components (65) are sequentially spaced and movably arranged on the low-level processing platform (61); The second pair of clamping components (66) and the third anti-rotation component (67) are sequentially spaced and movably arranged on the high-level processing platform (61).

7. The assembly line for jack cylinders according to claim 1, characterized in that: The testing device (7) comprises a testing console (71) and a plurality of test benches (72). The plurality of test benches (72) are arranged adjacent to each other and at intervals. The testing console (71) is arranged on one side of the plurality of test benches (72). The testing console (71) controls the plurality of test benches (72) to test the jack cylinder.

8. The assembly line for jack cylinders according to claim 1, characterized in that: The conveying device (9) comprises a truss mechanism (91), and the truss mechanism (91) is arranged directly above the piston rod assembly assembly device (5), the vertical assembly device (6) and the testing device (7); The truss mechanism (91) comprises a first truss unit (911) and a second truss unit (912); the first truss unit (911) is arranged directly above the piston rod pre-installation mechanism (51); and the second truss unit (912) is arranged directly above the piston drilling and tightening mechanism (52), the vertical assembly device (6) and the testing device (7); The first truss unit (911) includes a third gantry truss (9111) and a third manipulator (9112) movably disposed on the top of the third gantry truss (9111); The second truss unit (912) includes a fourth gantry truss (9121), a fourth manipulator (9122) and a fifth manipulator (9123) which are sequentially spaced and movably arranged on the top of the fourth gantry truss (9121).

9. The assembly system for a jack cylinder according to claim 8, characterized in that: The conveying device (9) also includes a conveying mechanism (92), the input end of the conveying mechanism (92) is connected to the discharge end of the cylinder demagnetization cleaning device (2), and the output end of the conveying mechanism (92) is connected to the feed end of the vertical assembly device (6), so as to convey the cleaned cylinder to the vertical assembly device (6) for assembly.

10. A method for assembling a jack cylinder, characterized in that: The assembly production line for jack cylinders according to any one of claims 1 to 9 comprises the following steps in sequence: S1, workpiece loading: the cylinder loading device (1) and the piston rod loading device (3) respectively deliver the cylinder and the piston rod to the feeding ends of the cylinder demagnetization cleaning device (2) and the piston rod demagnetization cleaning device (4); S2, demagnetization and cleaning: using a cylinder demagnetization and cleaning device (2) and a piston rod demagnetization and cleaning device (4) to demagnetize and clean the cylinder and the piston rod respectively; S3, pre-installing the piston rod assembly: the cleaned piston rod is transported to the feed end of the piston rod pre-installation mechanism (51) by the transport device (9), and the guide sleeve and the piston are pre-installed on the piston rod by the piston rod pre-installation mechanism (51) to form the piston rod assembly; S4, punching and tightening the piston: the pre-assembled piston rod assembly is conveyed to the piston punching and tightening mechanism (52) by the conveying device (9), the piston in the piston rod assembly is tightened by the piston punching and tightening mechanism (52), the piston is punched and the piston and the piston rod are fixed by screws; S5, assembly: the cleaned cylinder barrel is conveyed to the vertical assembly device (6) by the conveying device (9), and the assembled piston rod assembly is conveyed to the vertical assembly device (6) by the conveying device (9). The vertical assembly device (6) aligns and assembles the cylinder barrel and the piston rod in the piston rod assembly and tightens the guide sleeve to form a jack cylinder; S6, testing: transporting the assembled jack cylinder to the feeding end of the testing device (7) through the truss mechanism (91), and testing the pressure bearing and sealing properties of the jack cylinder using the testing device (7); S7, offline: the jack cylinders that have passed the inspection are offline and stacked through the offline stacking device (8).

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