Hydraulic tensioner assembly line

Abstract

The invention discloses an assembly line for a hydraulic tensioner. The assembly line is a highly automatic and integrated production system. The system is mainly composed of an annular conveying line, a plurality of assembly stations, a control cabinet and a manipulator. The annular conveying line serves as core conveying equipment and is responsible for conveying workpieces between different assembly stations, and it is guaranteed that all procedures are carried out orderly. Each assembly station is connected with the control cabinet, and accurate control over the whole assembly process is achieved through the control cabinet. The assembly line is further particularly provided with a workpiece tray feeding area for corresponding stations to use. In addition, a stop pin punching device is arranged on the pull rod assembling station, and necessary drilling operation can be carried out on the cylinder body. The pressure maintaining test station adopts a dual-detection mode, and a sensor is arranged to monitor the displacement change of the ejector rod in real time, so that accurate recording of data is ensured. On the whole, the assembly line achieves the one-stop automatic production process from raw material supply to finished product output, and the working efficiency and the product quality are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of tensioner assembly, and in particular to a hydraulic tensioner assembly line. Background Art

[0002] A hydraulic tensioner is a device used to maintain proper tension in a transmission system such as a belt, chain or cable. It is widely used in industrial machinery, conveyor systems and automotive engines to ensure that these systems can operate efficiently and smoothly. The main components of a hydraulic tensioner include: hydraulic cylinder, tie rod, push rod, seal, spring, support and other components.

[0003] The existing hydraulic tensioner is mostly assembled manually, and the various components of the hydraulic tensioner are assembled together one by one. Since the hydraulic tensioner has many components, more assembly stations are required, and each station is equipped with at least one assembler. This not only has high labor costs, but also low assembly efficiency and unsatisfactory assembly quality.

[0004] In view of the above, it is necessary to propose a hydraulic tensioner assembly line to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects in the prior art and provide a hydraulic tensioner assembly line.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a hydraulic tensioner assembly line, comprising a ring conveyor line, a plurality of assembly stations arranged around the ring conveyor line, a control cabinet and a manipulator; the ring conveyor line controls the workpiece to be transported between the assembly stations, and each output end of the control cabinet is connected to the corresponding end of the ring conveyor line, the corresponding end of the assembly station, and the corresponding end of the manipulator respectively;

[0007] The assembly stations include: a pull rod assembly station, a push rod assembly station, a pressure holding test station, a limit sleeve assembly station, a spring assembly station, a support assembly station, a general assembly station, and a material unloading and stacking station, which are arranged in sequence around the annular conveyor line;

[0008] The tie rod assembly station is used to push the tie rod workpiece to a predetermined position in the cylinder body; the push rod assembly station is used to invert the cylinder body, inject hydraulic oil from the other end and press the push rod workpiece into it;

[0009] The manipulators include a truss manipulator and a palletizing manipulator; the pressure-maintaining test station, the limit sleeve assembly station, the spring assembly station, and the support assembly station are all grasped by the truss manipulator to grab the workpiece and move it back and forth between the station and the circular conveyor line; the palletizing manipulator grabs the workpiece and moves it between the final assembly station, the unloading and palletizing station and the circular conveyor line.

[0010] Furthermore, a workpiece pallet loading area is provided between the tie rod assembly station and the push rod assembly station; a classification pallet for supplying materials to the tie rod assembly station and the push rod assembly station is provided in the workpiece pallet loading area, and the classification pallet includes a cylinder pallet, a tie rod pallet, and a push rod pallet.

[0011] Furthermore, the tie rod assembly station includes a cylinder cleaning tool and a tie rod automatic pressing tool. The cylinder cleaning tool cleans at least one cylinder, and the cleaned cylinder is transferred to the tie rod automatic pressing tool. The tie rod automatic pressing tool is provided with a cylinder positioning tool and a pushing cylinder. The free end of the pushing cylinder coincides with the axis of the cylinder workpiece positioned by the cylinder positioning tool. It also includes a stop pin punching tool, which drills the cylinder workpiece fixed by the cylinder positioning tool through a punching motor.

[0012] Furthermore, the ejector assembly station includes a quantitative oiling station for oiling the inside of the cylinder workpiece, and the ejector workpiece is positioned and screwed into the cylinder workpiece by a servo motor.

[0013] Furthermore, the truss robot moves the workpiece from the ring conveyor line to the pressure-maintaining test station, which is provided with double inspection stations. Each inspection station is provided with a servo electric cylinder, which applies test pressure to the push rod, and a sensor monitors the displacement change of the push rod in real time and forms data storage.

[0014] Furthermore, the limit sleeve assembly station, the spring assembly station, and the support assembly station are all equipped with corresponding truss manipulators to grab the workpieces on the tray and assemble them on the hydraulic tensioner on the ring conveyor line.

[0015] Furthermore, the final assembly station is moved into place by a palletizing robot that grabs the products on the circular conveyor line. The final assembly station is provided with two sets of pressing tools. The pressing tools are provided with a lower pressing plate driven by a hydraulic press. The lower pressing plate compresses the spring on the tensioner product to expose the end of the pull rod, and a servo motor for tightening the nut is provided to tighten the nut on the end of the pull rod.

[0016] Furthermore, after the nut is installed, the tensioner product is grabbed by the palletizing robot and transferred to the unloading and palletizing station, and the assembly of the stop plate and the screw is completed.

[0017] An assembly process for a hydraulic tensioner assembly line comprises the following steps:

[0018] Step 1: Workpiece preparation and loading: place the cylinder pallet, tie rod pallet, ejector pallet and other raw material pallets in the workpiece pallet loading area, and provide the necessary components for subsequent assembly;

[0019] Step 2: Tie rod assembly. The cylinder body is first cleaned by the cleaning tool, and then transferred to the tie rod automatic press tool. Before the tie rod is pressed, the sealing ring is installed manually, and the tie rod is accurately pressed into the predetermined position in the cylinder body by the top pressing cylinder, and the cylinder body is drilled by the stop pin punching machine;

[0020] Step 3: Assemble the ejector rod. The cylinder body with the cleaned and assembled pull rod is inverted, and a quantitative hydraulic oil is injected into the other end of the cylinder body by the automatic oil injection device. Then the servo motor positions and screws the ejector rod into the cylinder body. This step also includes automatic marking and installation of the oil nozzle.

[0021] Step 4: Pressure holding test. After the ejector assembly is completed, the truss manipulator moves the workpiece to the pressure holding test station. This step is a dual-station simultaneous test. The servo electric cylinder applies test pressure to the ejector, and the displacement change of the pressure holding is monitored in real time, and the data is recorded to ensure product quality.

[0022] Step 5: Assemble the limit sleeve. The truss manipulator grabs the limit sleeve from the tray and accurately installs it on the hydraulic tensioner on the circular conveyor line.

[0023] Step 6: Spring assembly: Use the truss manipulator to grab the spring from the tray and assemble it to the corresponding position of the hydraulic tensioner;

[0024] Step 7: Assemble the support. Continue to use the truss manipulator to grab the support from the tray and install it on the hydraulic tensioner.

[0025] Step 8: Final assembly: the palletizing robot grabs the semi-finished products on the circular conveyor line and moves them to the final assembly station. Two sets of pressing tools are installed at this station to compress the spring on the tensioner product to expose the end of the pull rod, and the servo motor tightens the nut on the end of the pull rod.

[0026] Step 9: Unloading and palletizing. After the final assembly is completed, the palletizing robot intervenes again to transfer the finished product to the unloading and palletizing station, and completes the assembly of any remaining stop plates and screws here.

[0027] The advantages and beneficial effects of the present invention are:

[0028] 1. The hydraulic tensioner assembly line of the present invention introduces a truss manipulator, a stacking manipulator and various automated tooling, such as a pull rod automatic press machine, a servo motor screwing system, etc., which greatly reduces manual intervention, improves production efficiency and consistency, and reduces labor costs.

[0029] 2. Combined with the cleaning tooling in the tie rod assembly station, an integrated cleaning and lubrication workstation is created, which not only ensures the smooth operation of internal components, but also reduces friction losses in subsequent processes and extends the service life of the product.

[0030] 3. Establish a closed-loop system from data collected by sensors to the analysis platform and then to feedback to the production line. By analyzing a large amount of production data, find out the key factors affecting product quality and adjust the production process parameters in time to form a quality management mechanism for continuous improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a hydraulic tensioner assembly line of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the tie rod assembly station in the present invention;

[0033] Figure 3 It is a structural schematic diagram of the ejector assembly station in the present invention;

[0034] Figure 4 It is a structural schematic diagram of the pressure holding test station in the present invention;

[0035] Figure 5 It is a structural schematic diagram of the final assembly station in the present invention;

[0036] In the figure: 1. Annular conveyor line; 2. Control cabinet; 3. Tie rod assembly station; 4. Push rod assembly station; 5. Pressure holding test station; 6. Limit sleeve assembly station; 7. Spring assembly station; 8. Support assembly station; 9. General assembly station; 10. Unloading and stacking station; 11. Truss manipulator; 12. Stacking manipulator; 13. Workpiece pallet loading area; 14. Cylinder pallet; 15. Tie rod pallet; 16. Push rod pallet; 17. Cylinder cleaning tool; 18. Tie rod automatic pressing tool; 19. Cylinder positioning tool; 20. Push cylinder; 21. Stop pin punching tool; 22. Quantitative oiling station; 23. Servo electric cylinder; 24. Pressing tool; 25. Lower pressure plate; 26. Servo motor; 27. Vibrating feed tray. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0038] A hydraulic tensioner assembly line, such as Figure 1As shown, it includes a circular conveyor line 1 and several assembly stations arranged around the circular conveyor line 1. The circular conveyor line 1 is elliptical, and the two sides are arranged parallel to each other. The circular conveyor line 1 has an elliptical track, and placement tools for placing workpieces are evenly spaced on the track. When the workpiece of the tensioner is placed on the tooling, its position can be positioned to form an upright state, and the setting of the workpiece placement tooling is convenient for the robot to pick up or place. Each tooling is connected to a driving chain running in the track, so that all placement tools can move around the circular conveyor line 1 at the same time, thereby forming a driving effect for the movement of the workpiece between the stations, and the circular conveyor line 1 is preferably intermittently moved. When the placement tooling moves to the corresponding station, the circular conveyor line 1 stops moving, which is convenient for cooperating with the robot to carry out the workpiece picking and placing operation; the assembly line is also provided with a control cabinet 2 and a robot; specifically, each output end of the control cabinet 2 is connected to the corresponding end of the circular conveyor line 1, the corresponding end of the assembly station, and the corresponding end of the robot respectively;

[0039] like Figure 1 As shown, the assembly stations include: a pull rod assembly station 3, a push rod assembly station 4, a pressure holding test station 5, a limit sleeve assembly station 6, a spring assembly station 7, a support assembly station 8, a general assembly station 9, and a material unloading and stacking station 10, which are arranged in sequence around the circular conveyor line 1;

[0040] The tie rod assembly station 3 is used to push the tie rod workpiece to a predetermined position in the cylinder body; the push rod assembly station 4 is used to invert the cylinder body, inject hydraulic oil from the other end and press the push rod workpiece; and a workpiece pallet loading area 13 is provided between the tie rod assembly station 3 and the push rod assembly station 4; the workpiece pallet loading area 13 is provided with a classification pallet for feeding the tie rod assembly station 3 and the push rod assembly station 4, and the classification pallet includes a cylinder body pallet 14, a tie rod pallet 15, and a push rod pallet 16. There is a certain distance between the tie rod assembly station 3 and the push rod assembly station 4, and the workpiece pallet loading area 13 is formed by using this piece of workpiece. Figure 1 As shown, various raw material workpieces that can be used in the initial assembly stations, namely the tie rod assembly station 3 and the push rod assembly station 4, are regularly placed in this area, and KBK hoists are also provided in this area to facilitate taking various workpieces to the stations, or to hang the workpieces assembled at the tie rod assembly station 3 and the push rod assembly station 4 on the ring conveyor line 1.

[0041] The location of each workstation is as follows: Figure 1As shown, a cylinder assembly station, a workpiece pallet loading area 13 and a push rod assembly station 4 are arranged on the straight side of the circular conveyor line 1, and a pressure holding test station 5, a limit sleeve assembly station 6, a spring assembly station 7, a support assembly station 8, and a general assembly station 9 are arranged in sequence on the other side of the circular conveyor line 1. The manipulator includes a truss manipulator 11 and a stacking manipulator 12; the KBK hoist is arranged in the workpiece pallet loading area 13 to meet the needs of hoisting the workpieces at the stations on both sides or hoisting the workpieces on the circular conveyor line 1.

[0042] The straight side on the other side of the circular conveyor line 1 is sequentially arranged as a pressure-maintaining test station 5, a limit sleeve assembly station 6, a spring assembly station 7, and a support assembly station 8. The pressure-maintaining test station 5, the limit sleeve assembly station 6, the spring assembly station 7, and the support assembly station 8 are all moved back and forth between the station and the circular conveyor line 1 by a truss manipulator 11 to grab the workpiece; each station is respectively provided with a truss manipulator 11 to facilitate the movement of the workpiece back and forth and hanging it on the circular conveyor line 1 or on the corresponding stations.

[0043] A palletizing robot 12 is arranged at one end of the circular conveyor line 1, so that the palletizing robot 12 is located between the final assembly station 9 and the unloading palletizing station 10, and the palletizing robot 12 grabs the workpiece and moves it between the final assembly station 9, the unloading palletizing station 10 and the circular conveyor line 1. During production, when the product assembled at the support assembly station 8 is moved to the grabbing range of the palletizing robot 12, the palletizing robot 12 grabs the product to the final assembly station 9 for assembly. After the assembly is completed, the palletizing robot 12 grabs the assembled product and places it on the pallet on the unloading palletizing station 10.

[0044] Specifically, the rod assembly station 3 is also integrated with a cylinder cleaning tool 17, a rod automatic pressing tool 2418, and a stop pin punching tool 21. The cylinder cleaning tool 17 cleans at least one cylinder. The cylinder to be cleaned is placed in the cylinder cleaning tool 17, and after cleaning, it is directly transferred to the rod automatic pressing tool 2418 on one side. Figure 2 As shown, the automatic tie rod press tool 2418 is provided with a cylinder body positioning tool 19 and a top pressing cylinder 20, and the free end of the top pressing cylinder 20 coincides with the axis of the cylinder body workpiece positioned by the cylinder body positioning tool 19; after the cylinder body is placed in the positioning tool, the cylinders symmetrically arranged on both sides push toward the middle to clamp the cylinder body, and make the axis of the cylinder body workpiece coincide with the axis of the upper top pressing cylinder 20, and then the operator puts the tie rod with the sealing ring installed into the cylinder body, and the upper end of the tie rod is aligned with the lower end of the top pressing cylinder 20, and then the top pressing cylinder 20 presses down to contact the tie rod, thereby pressing the tie cylinder into the cylinder body workpiece to a predetermined depth. It also includes a stop pin punching tool 21, such as Figure 2As shown on the right side of the figure, the stop pin punching tool 21 uses a punching motor to drill holes in the cylinder workpiece fixed by the cylinder positioning tool 19. In addition, this tool is also provided with a vibrating feeding plate 27, which can feed the stop pin to the punching position in a predetermined posture, so that the operator can conveniently take and install it, thereby effectively improving the installation efficiency. After completing the installation of this station, the KBK sling will sling the assembled product to the placement tool on the circular conveyor line 1, and then the circular conveyor line 1 will continue to run, control the product to move to the next station, and with the circular conveyor line 1 cyclic movement, the vacant placement tool will be rotated to the tie rod assembly station 3 to achieve the purpose of cyclic transportation.

[0045] Furthermore, the push rod assembly station 4 includes a quantitative oiling station 22 for oiling the inside of the cylinder workpiece, and the push rod workpiece is positioned and screwed into the cylinder workpiece by a servo motor 26. Figure 3 As shown, when the product with the cylinder installed moves to the push rod assembly station 4, the KBK hoist lifts the product out of the circular conveyor line 1 and sends it to the quantitative oiling station 22 of the push rod assembly station 4, injects a certain amount of hydraulic oil into the cylinder body, and then transfers it to the cylinder body positioning tool 19 in the push rod assembly station 4 next to it. It can be understood that the cylinder body positioning tool 19 in this station is the same as the aforementioned structure; the clamping and positioning of the cylinder body is completed, and then a servo motor 26 is provided on the upper part of the push rod assembly station 4, and the output end of the servo motor 26 is fixed with the push rod workpiece to be assembled, the servo motor 26 moves down and cooperates to control the rotation of the push rod workpiece to install the workpiece into the cylinder body to complete the assembly; and this station also integrates an automatic marking process to complete the marking of relevant parameters on the surface of the cylinder body. After completion, the KBK hoist is placed in the circular conveying point and sent to the next station for assembly.

[0046] The workpiece is transferred from the ring conveyor line 1 to the pressure test station 5 by the truss manipulator 11. Figure 4 As shown, the pressure test station 5 is equipped with double test stations. To match the production capacity and production rhythm, the double stations are arranged to perform pressure test simultaneously to ensure the test efficiency of the hydraulic tensioner. At the same time, the pressure value and pressure displacement change are monitored in real time, and the test data is stored. Figure 4 As shown, each inspection station is provided with a servo electric cylinder 23, which applies a test pressure to the push rod. The product is hoisted by the corresponding truss manipulator 11 onto the cylinder positioning fixture 19 to position the product, and then the servo electric cylinder 23 is pressed down to apply and maintain a predetermined pressure on the push rod. During the process, the displacement change of the push rod is recorded. If the push rod is not compressed during the inspection, or the compression amount is within the required range of the product, it can be determined that the sealing of the cylinder body is good and meets the product quality requirements. Otherwise, the quality of the product is unqualified, and unqualified products need to be inspected and reassembled.

[0047] The limit sleeve assembly station 6, the spring assembly station 7, and the support assembly station 8 are all equipped with corresponding truss manipulators 11 to grab the workpieces on the tray and assemble them on the hydraulic tensioner on the ring conveyor line 1. Figure 1 As shown, it can be understood that the assembly work completed by the limit sleeve assembly station 6, the spring assembly station 7, and the support assembly station 8 are all carried out by the corresponding truss manipulator 11 which grabs the workpiece on the workpiece pallet and moves it to the upper part of the product on the circular conveyor line 1, and then inserts it accordingly to complete the assembly. At the limit sleeve assembly station 6, the manipulator picks up the workpieces arranged regularly on the workpiece pallet in turn and then inserts them on the product to complete the assembly; at the spring assembly station 7, the manipulator also picks up the spring and places it on the product to complete the assembly; at the support assembly station 8, the corresponding manipulator takes the support workpiece and puts it into the upper part of the corresponding product; after completing the above assembly, the product moves to the final assembly station 9 along the circular conveyor line 1.

[0048] The final assembly station 9 is moved to a position by the stacking robot 12 grabbing the products on the circular conveyor line 1. The final assembly station 9 is provided with two sets of pressing tools 24, such as Figure 5 As shown, this station is equipped with two sets of tools to coordinate production capacity and improve assembly efficiency. The press tool 24 is equipped with a lower pressure plate 25 driven by a hydraulic press. Each press station is equipped with two 150-ton hydraulic presses to drive the lower pressure plate 25. When the lower pressure plate 25 moves down, the lower pressure plate 25 compresses the spring on the tensioner product to expose the end of the pull rod, and a servo motor 26 for tightening the nut is provided to tighten the nut on the end of the pull rod. Figure 5 As shown, a servo motor 26 is arranged between the two hydraulic presses, and nuts are sequentially fed in by a vibrating feeding tray 27 at the lower end of the servo motor 26. When the spring is compressed, the end of the pull cylinder is exposed, and then the servo motor 26 moves down and rotates in coordination to screw the nut onto the pull rod to complete the assembly.

[0049] Furthermore, after the nut is installed, the tensioner product is grabbed by the palletizing robot 12 and transferred to the unloading and palletizing station 10, and the assembly of the stop plate and the screw is completed.

[0050] An assembly process for a hydraulic tensioner assembly line comprises the following steps:

[0051] Step 1: Workpiece preparation and loading, placing the cylinder tray 14, the tie rod tray 15, the ejector tray 16 and other raw material trays in the workpiece tray loading area 13, and providing the necessary components for subsequent assembly;

[0052] Step 2: Tie rod assembly, the cylinder body is first cleaned by the cleaning tool, and then transferred to the tie rod automatic press tool 2418. Before the tie rod is pressed, the sealing ring is installed manually, and the tie rod is accurately pressed into the predetermined position in the cylinder body by the top pressing cylinder 20, and the cylinder body is drilled by the stop pin punching machine;

[0053] Step 3: Assembling the ejector rod, the cylinder body with the cleaned and assembled pull rod is inverted, and a quantitative hydraulic oil is injected into the other end of the cylinder body by the automatic oil injection device, and then the servo motor 26 positions and screws the ejector rod into the cylinder body. This step also includes automatic marking and installation of the oil nozzle;

[0054] Step 4: Pressure holding test. After the ejector assembly is completed, the truss manipulator 11 transfers the workpiece to the pressure holding test station 5. This step is a dual-station simultaneous test. The servo electric cylinder 23 applies test pressure to the ejector, and the displacement change of the pressure holding is monitored in real time, and the data is recorded to ensure product quality.

[0055] Step 5: Assembling the limit sleeve, the truss manipulator 11 grabs the limit sleeve from the material tray and accurately installs it on the hydraulic tensioner on the ring conveyor line 1;

[0056] Step 6: Spring assembly: Use the truss manipulator 11 to grab the spring from the tray and assemble it to the corresponding position of the hydraulic tensioner;

[0057] Step 7: Assembling the support, continue to use the truss manipulator 11 to grab the support from the tray and install it on the hydraulic tensioner;

[0058] Step 8: Final assembly, the palletizing robot 12 grabs the semi-finished product on the circular conveyor line 1 and moves it to the final assembly station 9, where two sets of pressing tools 24 are provided to compress the spring on the tensioner product to expose the end of the pull rod, and the servo motor 26 tightens the nut on the end of the pull rod.

[0059] Step 9: Unloading and palletizing. After the final assembly is completed, the palletizing robot 12 intervenes again to transfer the finished product to the unloading and palletizing station 10, and completes the assembly of any remaining stop plates and screws here.

[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A hydraulic tensioner assembly line, characterized in that: It includes a circular conveyor line, a plurality of assembly stations arranged around the circular conveyor line, a control cabinet and a manipulator; the circular conveyor line controls the workpiece to be transported between the assembly stations, and each output end of the control cabinet is correspondingly connected to the corresponding end of the circular conveyor line, the corresponding end of the assembly station, and the corresponding end of the manipulator; The assembly stations include: a pull rod assembly station, a push rod assembly station, a pressure holding test station, a limit sleeve assembly station, a spring assembly station, a support assembly station, a general assembly station, and a material unloading and stacking station, which are arranged in sequence around the annular conveyor line; The tie rod assembly station is used to push the tie rod workpiece to a predetermined position in the cylinder body; the push rod assembly station is used to invert the cylinder body, inject hydraulic oil from the other end and press the push rod workpiece into it; The manipulators include a truss manipulator and a palletizing manipulator; the pressure-maintaining test station, the limit sleeve assembly station, the spring assembly station, and the support assembly station are all grasped by the truss manipulator to grab the workpiece and move it back and forth between the station and the circular conveyor line; the palletizing manipulator grabs the workpiece and moves it between the final assembly station, the unloading and palletizing station and the circular conveyor line.

2. A hydraulic tensioner assembly line according to claim 1, characterized in that: A workpiece pallet loading area is provided between the tie rod assembly station and the push rod assembly station; a classification pallet for supplying materials to the tie rod assembly station and the push rod assembly station is provided in the workpiece pallet loading area, and the classification pallet includes a cylinder pallet, a tie rod pallet, and a push rod pallet.

3. The hydraulic tensioner assembly line according to claim 1, characterized in that: The tie rod assembly station includes a cylinder cleaning tool and a tie rod automatic pressing tool. The cylinder cleaning tool cleans at least one cylinder, and the cleaned cylinder is transferred to the tie rod automatic pressing tool. The tie rod automatic pressing tool is provided with a cylinder positioning tool and a top pressing cylinder. The free end of the top pressing cylinder coincides with the axis of the cylinder workpiece positioned by the cylinder positioning tool. It also includes a stop pin punching tool, which drills the cylinder workpiece fixed by the cylinder positioning tool through a punching motor.

4. A hydraulic tensioner assembly line according to claim 1, characterized in that: The push rod assembly station includes a quantitative oil injection station for injecting oil into the cylinder workpiece, and the push rod workpiece is positioned and screwed into the cylinder workpiece by a servo motor.

5. The hydraulic tensioner assembly line according to claim 1, characterized in that: The workpiece is transferred from the circular conveyor line to the pressure-maintaining test station by a truss robot. The pressure-maintaining test station is equipped with double inspection stations. Each inspection station is equipped with a servo electric cylinder. The servo electric cylinder applies test pressure to the ejector rod, and a sensor monitors the displacement change of the ejector rod in real time and forms data storage.

6. The hydraulic tensioner assembly line according to claim 1, characterized in that: The limit sleeve assembly station, the spring assembly station, and the support assembly station are all equipped with corresponding truss manipulators to grab the workpieces on the tray and assemble them on the hydraulic tensioner on the ring conveyor line.

7. The hydraulic tensioner assembly line according to claim 1, characterized in that: The final assembly station is moved into position by a palletizing robot that grabs the products on the circular conveyor line. The final assembly station is provided with two sets of pressing tools. The pressing tools are provided with a lower pressing plate driven by a hydraulic press. The lower pressing plate compresses the spring on the tensioner product to expose the end of the pull rod, and a servo motor for tightening the nut is provided to tighten the nut on the end of the pull rod.

8. The hydraulic tensioner assembly line according to claim 7, characterized in that: After the nut is installed, the palletizing robot grabs the tensioner product and transfers it to the unloading and palletizing station, and completes the assembly of the stop plate and screws.

9. An assembly process for a hydraulic tensioner assembly line according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Workpiece preparation and loading: place the cylinder pallet, tie rod pallet, ejector pallet and other raw material pallets in the workpiece pallet loading area, and provide the necessary components for subsequent assembly; Step 2: Tie rod assembly. The cylinder body is first cleaned by the cleaning tool, and then transferred to the tie rod automatic press tool. Before the tie rod is pressed, the sealing ring is installed manually, and the tie rod is accurately pressed into the predetermined position in the cylinder body by the top pressing cylinder, and the cylinder body is drilled by the stop pin punching machine; Step 3: Assemble the ejector rod. The cylinder body with the cleaned and assembled pull rod is inverted, and a quantitative hydraulic oil is injected into the other end of the cylinder body by the automatic oil injection device. Then the servo motor positions and screws the ejector rod into the cylinder body. This step also includes automatic marking and installation of the oil nozzle. Step 4: Pressure holding test. After the ejector assembly is completed, the truss manipulator moves the workpiece to the pressure holding test station. This step is a dual-station simultaneous test. The servo electric cylinder applies test pressure to the ejector, and the displacement change of the pressure holding is monitored in real time, and the data is recorded to ensure product quality. Step 5: Assemble the limit sleeve. The truss manipulator grabs the limit sleeve from the tray and accurately installs it on the hydraulic tensioner on the circular conveyor line. Step 6: Spring assembly: Use the truss manipulator to grab the spring from the tray and assemble it to the corresponding position of the hydraulic tensioner; Step 7: Assemble the support. Continue to use the truss manipulator to grab the support from the tray and install it on the hydraulic tensioner. Step 8: Final assembly: the palletizing robot grabs the semi-finished products on the circular conveyor line and moves them to the final assembly station. Two sets of pressing tools are installed at this station to compress the spring on the tensioner product to expose the end of the pull rod, and the servo motor tightens the nut on the end of the pull rod. Step 9: Unloading and palletizing. After the final assembly is completed, the palletizing robot intervenes again to transfer the finished product to the unloading and palletizing station, and completes the assembly of any remaining stop plates and screws here.

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