A piston rod guide ring overlay production line and production method

Abstract

The present application relates to the technical field of oil cylinder, especially to a piston rod guide ring covering production line and a production method thereof, which comprises a robot, an electrical cabinet, a piston rod, a copper ring, a control system, a robot control cabinet and a hydraulic station respectively located in front of and right side of the electrical cabinet, and a copper ring hydraulic machine located at one side of the hydraulic station, wherein the robot is located in front of the copper ring hydraulic machine, and an oil immersion degreasing tank and an oil immersion air blowing tank are respectively arranged on the left and right sides of the robot, and a workpiece transfer frame is arranged on one side of the oil immersion degreasing tank and the oil immersion air blowing tank. The present application adopts a full-automatic production line, integrates oil immersion, cleaning, covering, transfer and storage processes into one, reduces labor cost, improves production efficiency, has good and stable covering effect, and is convenient to change mold.

Description

Technical Field

[0001] This invention relates to the field of hydraulic cylinder technology, and in particular to a piston rod guide ring pressing production line and production method. Background Technology

[0002] The piston rod is a crucial component of the hydraulic cylinder. The traditional method for producing piston rod guide rings involves welding a pre-fabricated guide ring (usually made of copper) into the piston rod groove. This traditional method requires molten copper within the piston rod groove, followed by cooling and final machining. This process presents three major problems:

[0003] 1. Low efficiency: As the piston diameter increases, the copper melting time is significantly extended (e.g., melting copper for large-diameter workpieces can take tens of minutes).

[0004] 2. Unstable quality: Welding quality depends on worker skills and is prone to defects such as porosity and lack of fusion, with surface roughness exceeding Ra 12.5μm;

[0005] 3. Risk of thermal deformation: High-temperature welding can easily lead to changes in the metallographic structure of the piston rod, requiring subsequent straightening and secondary processing, which increases costs.

[0006] To address the aforementioned issues, Chinese patent (CN202411548626.6) provides a hydraulic cylinder piston guide ring pressing device and method, which presses a prefabricated copper ring into the groove of the piston blank using hydraulic pressure, replacing the traditional copper welding process. However, this method has the following drawbacks:

[0007] 1. Focusing only on the lamination process, without pre- and post-processing modules (such as cleaning and degreasing), it relies on manual handling, resulting in low efficiency;

[0008] 2. Insufficient alignment between the manually placed copper ring and the piston rod groove can easily lead to uneven pressure or deformation of the copper ring.

[0009] 3. The outer surfaces of the upper and lower parts of the mold top block are longitudinal oblique cone surface one and longitudinal oblique cone surface two. The mold top blocks are connected by springs. The uneven force of the spring connection, coupled with the weight of the mold top block itself, can easily cause the mold top block and mold top to become skewed, which in turn causes indentations on the surface of the copper ring.

[0010] 4. The hydraulic system is used to adjust the follow-up stroke of the ejector cylinder to keep 1 / 2 of the ejection stroke of the overpress cylinder, so that the mold and the copper ring are at the same height. However, the hydraulic system cannot accurately adjust the ejection stroke of the ejector cylinder and the overpress cylinder.

[0011] 5. For example, in CN202411548626.6 Figure 4 As shown, the mold top is fixed to the mold top block by side bolts. The space at the top of the pressure cylinder is limited, making mold changing inconvenient.

[0012] This invention addresses the shortcomings of traditional methods and Chinese patent (CN202411548626.6) by proposing a piston rod guide ring overlay production line and method. It achieves full automation through a robot-connected workpiece transfer frame, oil-immersion air-blowing tank, copper ring hydraulic press, and oil-immersion degreasing tank, reducing labor costs and improving production efficiency. A camera and mechanical grippers work together to achieve visual closed-loop control, preventing overlay deviation or copper ring deformation. Optimized mold component structure not only facilitates mold changing but also further prevents mold component misalignment and improves overlay quality. Synchronous movement of the main cylinder and lifting rotary cylinder is achieved, eliminating the need for separate hydraulic system adjustments and resulting in more precise overlay. Summary of the Invention

[0013] The purpose of this invention is to solve the problems existing in the prior art, and to propose a piston rod guide ring overlay production line and production method.

[0014] To achieve the above objectives, the present invention adopts the following technical solution: a piston rod guide ring pressing production line and production method, comprising a robot, an electrical cabinet, a hydraulic station, a piston rod, a copper ring, a control system, and a robot control cabinet located in front of and to the right of the electrical cabinet respectively. One end of the piston rod is provided with a groove. The invention also includes a copper ring hydraulic press located on one side of the hydraulic station. The robot is located in front of the copper ring hydraulic press. An oil immersion degreasing tank and an oil immersion air blowing tank are respectively provided on the left and right sides of the robot. A workpiece transfer frame is respectively provided on one side of the oil immersion degreasing tank and the oil immersion air blowing tank.

[0015] The copper ring hydraulic press includes a hydraulic press frame, cylinder assemblies and a copper ring rotary table respectively fixed to the left and right halves of the hydraulic press frame, and a copper ring clamping and detection module located on one side of the cylinder assembly and fixed above the hydraulic press frame.

[0016] The hydraulic cylinder assembly includes a main cylinder, a mold assembly located inside the main cylinder, and a lifting and rotating cylinder;

[0017] The oil immersion and air blowing tank includes an oil immersion station and an air blowing station;

[0018] The oil immersion and degreasing tank includes an oil immersion station two and a degreasing station;

[0019] The workpiece transfer frame includes a transfer frame, a top plate fixed to the top surface of the transfer frame, and a shelf fixed above the top plate.

[0020] Furthermore, the main cylinder includes a main cylinder barrel, a main cylinder head and a main cylinder mounting flange respectively fixed to the top and bottom surfaces of the main cylinder barrel, a main cylinder piston rod that slides up and down inside the main cylinder barrel, a main cylinder piston and a main cylinder end flange snapped and fixed to the outer side of the lower half of the main cylinder piston rod, the main cylinder end flange being fixed to the bottom of the main cylinder piston, a main cylinder piston rod end cap being fixedly connected above the main cylinder piston rod, and an oil port one and an oil port two penetrating through the side of the main cylinder barrel.

[0021] The lifting and rotating cylinder is located inside the piston rod of the main cylinder. The lifting and rotating cylinder includes a cylinder barrel and a cylinder bottom. The bottom of the main cylinder piston rod and the bottom of the cylinder barrel are respectively fixedly connected to the top of the cylinder bottom.

[0022] The lifting rotary cylinder has three oil ports running vertically through its bottom.

[0023] Furthermore, the lifting rotary cylinder barrel is provided with a lifting rotary cylinder pressure rod, a thrust ball bearing, and a lifting rotary cylinder plunger rod, which are slidably arranged from top to bottom.

[0024] The top of the lifting rotary cylinder is fixed with a lifting rotary cylinder pressure sleeve. The lifting rotary cylinder pressure sleeve has a T-shaped outline. The horizontal part of the T-shape is fixed above the lifting rotary cylinder, and the vertical part of the T-shape is placed inside the lifting rotary cylinder. The upper half of the vertical part of the T-shape is fixedly connected with multiple cam push rods, and the lower half of the vertical part of the T-shape has a groove.

[0025] Furthermore, the bottom of the lifting rotary cylinder pressure rod is provided with a step, and the upper half is provided with a cylindrical cam groove. One end of the cam push rod is placed in the cylindrical cam groove and works in cooperation with the cylindrical cam groove.

[0026] A spring is fitted above the step, and the spring is located inside the groove of the lifting rotary cylinder pressure sleeve.

[0027] A displacement sensor is fixedly connected to the middle of the bottom of the lifting rotary cylinder. The displacement sensor runs through the bottom of the lifting rotary cylinder and is placed inside the piston rod of the lifting rotary cylinder.

[0028] Furthermore, the mold assembly includes a mold shrinkage ring fixedly connected to the inner side of the main cylinder head, a mold top block slidably overlapping the top surface of the main cylinder piston rod end cap, and a mold top head fixed to the inner side of the mold top block.

[0029] A mold pressing block is bolted to the top of the mold top block and the mold top head. The upper half of the mold shrink ring is an inclined surface. The inner side of the inclined surface is inclined surface one, and the outer side of the mold top block is inclined surface two. Inclined surface one and inclined surface two work together.

[0030] Furthermore, the copper ring rotary table includes a rotary table mounting plate fixed to the hydraulic press frame, a hollow rotary table fixed to the top surface of the rotary table mounting plate, and a rotating disk connected above the hollow rotary table. A reduction motor is fixedly connected to the bottom of the hollow rotary table.

[0031] Multiple tooling base plates are evenly fixed above the rotating disk. The tooling base plates are two-layered. Multiple long guide shafts are fixedly connected above the upper tooling base plate, and multiple short guide shafts are fixed between the two tooling base plates.

[0032] The copper ring clamping and detection module includes a module mounting frame fixed to the hydraulic press frame, an X-axis fixed to the module mounting frame, a Z-axis slidably connected above the X-axis, and a Y-axis slidably connected to the front side of the Z-axis.

[0033] A camera is fixedly connected to the front side of the Z-axis, and a gripper is fixedly connected to the bottom of the Y-axis;

[0034] A photoelectric sensor is fixedly connected to the frame of the hydraulic press.

[0035] Furthermore, the oil immersion and air blowing tank also includes an oil immersion tank body, and there are two oil immersion stations, which are respectively set on both sides inside the oil immersion tank body. The air blowing station is located above the middle part of the oil immersion tank body. The air blowing station is a cuboid structure with an opening on the top surface. An annular air knife is fixedly connected to the top surface of the cuboid structure.

[0036] The oil immersion and degreasing tank also includes an oil immersion tank body two. There are two oil immersion stations, which are respectively arranged on both sides inside the oil immersion tank body two. The degreasing station is located above the middle part of the oil immersion tank body two and is a rectangular plate.

[0037] Positioning rings are provided in the middle of each of the oil immersion station 1, oil immersion station 2 and degreasing station, and an oil discharge groove is provided in the middle of the air blowing station.

[0038] The top plate has multiple openings running through it from top to bottom. There are two layers, and each layer and the top plate are separated and fixed by multiple uprights around their perimeters. Each layer and the top plate also have multiple uprights in the middle.

[0039] A production method for a piston rod guide ring overlay production line as described above includes the following steps:

[0040] S1. Oil Immersion and Air Blowing: The robot picks up the piston rod to be pressed from the workpiece transfer rack on one side of the oil immersion and air blowing tank and places it into the oil immersion station 1 in the oil immersion and air blowing tank for oil immersion treatment.

[0041] After the oil soaking is completed, the robot will pick up the piston rod on the first oil soaking station and move it to the air blowing station for air blowing treatment;

[0042] S2, Positioning: The robot picks up the piston rod that has finished blowing air from the blowing station and places it onto the cylinder assembly. Then, the copper ring clamping and detection module picks up the copper ring on the copper ring rotating table and places it onto the piston rod in the cylinder assembly.

[0043] S3, Pressing: The control system controls the cylinder assembly to press the copper ring into the second groove of the piston rod;

[0044] S4. Oil immersion and degreasing: The robot clamps the piston rod that has been pressed and places it into the second oil immersion station in the oil immersion and degreasing tank for oil immersion treatment. After the oil immersion is completed, the robot clamps the piston rod on the second oil immersion station to the degreasing station for degreasing treatment.

[0045] S5. Transfer: The robot clamps the degreased piston rod and stores it on the workpiece transfer rack on one side of the oil immersion degreasing tank, waiting for the next process to pick it up.

[0046] Furthermore, step S2 also includes positioning detection and adjustment: after the copper ring is sleeved on the piston rod in the cylinder assembly, the copper ring clamping detection module detects the center distance between the copper ring and the piston rod. If the center distance is ≤0.05mm, proceed to step S3; if the center distance is >0.05mm, the control system controls the copper ring clamping detection module to adjust the position of the copper ring until the center distance is ≤0.05mm, based on the center distance information fed back by the copper ring clamping detection module.

[0047] Compared with existing technologies, the advantages of this invention are:

[0048] 1. Production line integration: Robots are connected in series with oil immersion and air blowing tanks, oil immersion and degreasing tanks, copper ring hydraulic presses and workpiece transfer racks to realize full automation of the process of oil immersion → air blowing → covering pressure → oil immersion → degreasing → transfer and storage, reducing labor costs and improving production efficiency.

[0049] 2. Visual closed-loop positioning: The copper ring clamping and detection module detects the center distance between the copper ring and the piston rod (≤0.05mm) through a camera. If the distance exceeds the tolerance, the clamps will be corrected in real time to avoid skewed pressure or deformation of the copper ring.

[0050] 3. Mechanical synchronous pressing: The main cylinder and the lifting and rotating cylinder are mechanically rigidly connected through the bottom of the lifting and rotating cylinder, and the stroke is synchronized, so that the mold and the copper ring are at the same height. There is no need to rely on the hydraulic system to adjust the main cylinder and the lifting and rotating cylinder separately. At the same time, the lifting and rotating cylinder works with the mold assembly to complete multiple rotation pressing, so that there are no indentations on the surface of the copper ring.

[0051] 4. Quick-change mold structure: The mold top head is vertically fixed to the mold top block by top bolts. When changing molds, simply unscrew the bolts to replace the mold top head, improving mold changing efficiency.

[0052] 5. Self-locking design of mold top block: The outer side of the mold top block is a single slope, and the bottom slides and overlaps on the end cover of the main cylinder piston rod, which avoids the mold top block and mold top head from being skewed due to spring load and its own weight, and further eliminates indentation defects. Attached Figure Description

[0053] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0054] Figure 2 This is a three-dimensional structural diagram of the copper ring hydraulic press of the present invention;

[0055] Figure 3 This is a three-dimensional structural diagram of the copper ring hydraulic press for removing sheet metal covers in this invention;

[0056] Figure 4 This is a three-dimensional structural diagram of the copper ring clamping and detection module in this invention;

[0057] Figure 5 This is a front view of the copper ring rotary table in this invention;

[0058] Figure 6 This is a front view of the hydraulic cylinder assembly in this invention;

[0059] Figure 7 for Figure 6 Cross-sectional view of the hydraulic cylinder assembly (AA);

[0060] Figure 8 This is a cross-sectional view of the lifting rotary cylinder with the cylinder barrel and the lifting rotary cylinder pressure sleeve removed in this invention.

[0061] Figure 9 This is a three-dimensional structural diagram of the mold assembly in this invention;

[0062] Figure 10 This is a three-dimensional structural diagram of the mold top block and mold top head in this invention;

[0063] Figure 11 This is a three-dimensional structural diagram of the oil immersion air blowing tank in this invention;

[0064] Figure 12 This is a cross-sectional view of the oil-immersion air-blowing tank in this invention;

[0065] Figure 13 This is a three-dimensional structural diagram of the oil immersion degreasing tank in this invention;

[0066] Figure 14 This is a three-dimensional structural diagram of the workpiece transfer frame in this invention;

[0067] In the diagram: 1. Copper ring hydraulic press; 11. Sheet metal guard; 12. Cantilever operating platform; 13. Hydraulic press frame.

[0068] 14. Copper ring clamping and detection module; 141. Gripper; 142. Camera; 143. Y-axis; 144. X-axis; 145. Z-axis; 146. Right-angle bracket; 147. Module mounting bracket.

[0069] 15. Copper ring rotary table; 151. Rotary table mounting plate; 152. Gear motor; 153. Hollow rotary table; 154. Rotary disk; 155. Short guide shaft; 156. Long guide shaft; 157. Tooling base plate.

[0070] 16. Hydraulic Cylinder Assembly; 161. Main Cylinder; 1611. Main Cylinder Head; 1612. Main Cylinder Barrel; 1613. Main Cylinder Piston Rod; 1614. Main Cylinder Piston Rod End Cap; 1615. Main Cylinder Piston; 1616. Main Cylinder Mounting Flange; 1617. Main Cylinder End Flange; 162. Mold Assembly; 1621. Mold Shrink Ring; 1622. Mold Ejector Block; 1623. Mold Ejector Head; 1624. Mold Pressure Block; 163. Ejector... Lifting rotary cylinder, 1631, lifting rotary cylinder pressure sleeve, 1632, lifting rotary cylinder pressure rod, 16321, step, 16322, cylindrical cam groove, 1633, lifting rotary cylinder barrel, 1634, lifting rotary cylinder plunger rod, 1635, cam push rod, 1636, thrust ball bearing, 1637, lifting rotary cylinder bottom, 1638, spring, 164, positioning seat, 165, positioning slide sleeve, 166, displacement sensor.

[0071] 2. Oil immersion and air blowing tank; 21. Tank body one; 22. Oil immersion station one; 23. Air blowing station; 24. Annular air knife; 25. Positioning ring; 26. Oil drain slot.

[0072] 3. Oil immersion and degreasing tank; 31. Tank body two; 32. Oil immersion station two; 33. Degreasing station.

[0073] 4. Workpiece transfer rack; 41. Transfer frame; 42. Top plate; 43. Shelf; 44. Vertical plate.

[0074] 5. Robot, 6. Robot control cabinet, 7. Electrical cabinet, 8. Hydraulic station, 9. Piston rod, 10. Copper ring. Detailed Implementation

[0075] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0076] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0077] Example 1, such as Figures 1-14 As shown, a piston rod guide ring pressing production line includes a robot 5, an electrical cabinet 7, a piston rod 9, a copper ring 10, a control system, a robot control cabinet 6 located in front of the electrical cabinet 7 and a hydraulic station 8 located on the right side of the electrical cabinet 7, respectively. One end of the piston rod 9 is provided with a groove 2. The production line also includes a copper ring hydraulic press 1 located on one side of the hydraulic station 8. The robot 5 is located in front of the copper ring hydraulic press 1. An oil immersion degreasing tank 3 and an oil immersion air blowing tank 2 are respectively provided on the left and right sides of the robot 5. A workpiece transfer frame 4 is respectively provided on one side of the oil immersion degreasing tank 3 and the oil immersion air blowing tank 2.

[0078] The copper ring hydraulic press 1 includes a hydraulic press frame 13, a cylinder assembly 16 and a copper ring rotary table 15 respectively fixed to the left and right halves of the hydraulic press frame 13, and a copper ring clamping and detection module 14 located on one side of the cylinder assembly 16 and fixed above the hydraulic press frame 13.

[0079] The hydraulic cylinder assembly 16 includes a main cylinder 161, a mold assembly 162 located inside the main cylinder 161, and a lifting and rotating cylinder 163.

[0080] The copper ring hydraulic press 1 also includes a sheet metal cover 11 arranged around the hydraulic press frame 13, the cylinder assembly 16, the copper ring rotary table 15, the copper ring clamping and detection module 14, and a cantilever operating table 12 fixed on the sheet metal cover 11.

[0081] The oil immersion and air blowing tank 2 includes an oil immersion station 22 and an air blowing station 23;

[0082] The oil immersion and degreasing tank 3 includes an oil immersion station 32 and a degreasing station 33;

[0083] The workpiece transfer frame 4 includes a transfer frame 41, a top plate 42 fixed to the top surface of the transfer frame 41, and a shelf 43 fixed above the top plate 42.

[0084] With the above settings, this invention adopts a fully automated production line that integrates oil immersion, cleaning, pressing, transfer, and storage processes. The robot 5 picks up the piston rod 9 on the workpiece transfer rack 4 on one side of the oil immersion and air blowing tank 2 and places it into the oil immersion and air blowing tank 2 for oil immersion and air blowing treatment. Subsequently, the robot 5 picks up the piston rod 9 after the oil immersion and air blowing treatment and places it into the copper ring hydraulic press 1 for copper ring pressing. After pressing, the robot 5 picks up the piston rod 9 and places it into the oil immersion and degreasing tank 3 for oil immersion and degreasing treatment. After the oil immersion and degreasing treatment is completed, the robot 5 picks up the piston rod 9 again and places it into the workpiece transfer rack 4 on one side of the oil immersion and degreasing tank 3 for storage, waiting for the next process to pick it up, realizing the full automation of the process of oil immersion → air blowing → pressing → oil immersion → degreasing → transfer.

[0085] Example 2, as Figures 6-7 As shown,

[0086] The main cylinder 161 includes a main cylinder barrel 1612, a main cylinder head 1611 and a main cylinder mounting flange 1616 respectively fixed to the top and bottom surfaces of the main cylinder barrel 1612, a main cylinder piston rod 1613 that slides up and down inside the main cylinder barrel 1612, a main cylinder piston 1615 and a main cylinder end flange 1617 that are snapped and fixed to the outer side of the lower half of the main cylinder piston rod 1613, the main cylinder end flange 1617 being fixed to the bottom of the main cylinder piston 1615, a main cylinder piston rod end cap 1614 being fixedly connected to the top of the main cylinder piston rod 1613, and an oil port one and an oil port two penetrating through the side of the main cylinder barrel 1612.

[0087] The lifting rotary cylinder 163 is located inside the main cylinder piston rod 1613. The lifting rotary cylinder 163 includes a lifting rotary cylinder barrel 1633 and a lifting rotary cylinder bottom 1637. The bottom of the main cylinder piston rod 1613 and the bottom of the lifting rotary cylinder barrel 1633 are respectively fixedly connected to the top of the lifting rotary cylinder bottom 1637. The lifting rotary cylinder bottom 1637 is provided with three oil ports running through it vertically.

[0088] In this embodiment, since the bottom of the main cylinder piston rod 1613 is fixedly connected above the bottom of the lifting rotary cylinder 1637, when oil enters through port one and exits through port two, hydraulic oil enters the upper chamber between the main cylinder piston rod 1613 and the main cylinder barrel 1612. The pressure of the hydraulic oil pushes the main cylinder piston rod 1613 upward, causing the bottom of the lifting rotary cylinder 1637 to rise synchronously, and thus causing the entire lifting rotary cylinder 163 to rise synchronously. When oil exits through port one and enters through port two, hydraulic oil enters the lower chamber between the main cylinder piston 1615, the main cylinder piston rod 1613, and the main cylinder barrel 1612. The pressure of the hydraulic oil pushes the main cylinder piston 1615 to descend together with the main cylinder piston rod 1613, causing the bottom of the lifting rotary cylinder 1637 to descend synchronously, and thus causing the entire lifting rotary cylinder 163 to descend synchronously.

[0089] The main cylinder 161 and the lifting rotary cylinder barrel 1633 are rigidly connected together through the bottom of the lifting rotary cylinder 1637. The hydraulic system does not need to adjust the main cylinder 161 and the lifting rotary cylinder barrel 1633 separately. The synchronous movement of the main cylinder 161 and the lifting rotary cylinder barrel 1633 can be achieved by simply adjusting the oil inlet and outlet of the main cylinder 161 through the hydraulic system.

[0090] An opening is provided on the bottom 1637 of the lifting rotary cylinder, and the opening is located below the space formed between the main cylinder piston rod 1613 and the cylinder barrel 1633 of the lifting rotary cylinder. The advantage of this design is that it facilitates the discharge of copper slag generated by the pressure into the cylinder assembly 16.

[0091] Example 3, as Figures 7-8 As shown,

[0092] The lifting rotary cylinder barrel 1633 is equipped with a lifting rotary cylinder pressure rod 1632, a thrust ball bearing 1636, and a lifting rotary cylinder plunger rod 1634, which are slidably arranged from top to bottom inside the cylinder barrel 1633.

[0093] The top end of the lifting rotary cylinder plunger rod 1634 is fixedly connected to a positioning seat 164, and a positioning sliding sleeve 165 is fixedly connected above the positioning seat 164.

[0094] The top of the lifting rotary cylinder barrel 1633 is fixed with a lifting rotary cylinder pressure sleeve 1631. The lifting rotary cylinder pressure sleeve 1631 has a T-shaped outline. The horizontal side of the T-shape is fixed above the lifting rotary cylinder barrel 1633, and the vertical side of the T-shape is placed inside the lifting rotary cylinder barrel 1633. Multiple cam push rods 1635 are fixedly connected to the upper half of the vertical side of the T-shape, and a groove is provided inside the lower half of the vertical side of the T-shape.

[0095] The bottom of the lifting rotary cylinder pressure rod 1632 is provided with a step 16321, and the upper half is provided with a cylindrical cam groove 16322. One end of the cam push rod 1635 is placed in the cylindrical cam groove 16322 and works in cooperation with the cylindrical cam groove 16322. That is, one end of the cam push rod 1635 can only move relative to the cylindrical cam groove 16322 in the cylindrical cam groove 16322.

[0096] A spring 1638 is fitted above the step 16321, and the spring 1638 is located inside the groove of the lifting rotary cylinder pressure sleeve 1631.

[0097] A displacement sensor 166 is fixedly connected to the middle of the bottom 1637 of the lifting rotary cylinder. The displacement sensor 166 passes through the bottom 1637 of the lifting rotary cylinder and is placed inside the piston rod 1634 of the lifting rotary cylinder.

[0098] Based on the above embodiments, in this embodiment, the top and bottom surfaces of the cylindrical cam groove 16322 are provided with grooves of different shapes. The bottom surface of the cylindrical cam groove 16322 is groove group three, and the top surface is groove group four. Groove group three consists of multiple parabolic grooves with upward openings, and groove group four consists of multiple grooves with downward openings, a vertical left side, and an inclined right side. Groove group three and groove group four are staggered and opposite to each other.

[0099] When oil enters through port three, hydraulic oil enters the chamber below the lifting rotary cylinder plunger rod 1634. The pressure of the hydraulic oil pushes the lifting rotary cylinder plunger rod 1634 upward. From bottom to top, the lifting rotary cylinder plunger rod 1634 sequentially drives the thrust ball bearing 1636, the lifting rotary cylinder pressure rod 1632, the positioning seat 164, the positioning sleeve 165, the copper ring 10, and the piston rod 9 to rise synchronously until the top surface of the step 16321 contacts the bottom surface of the lifting rotary cylinder pressure sleeve 1631. At this time, the spring 1638 is in a compressed state and is completely placed inside the groove of the lifting rotary cylinder pressure sleeve 1631.

[0100] During the upward movement of the lifting rotary cylinder plunger rod 1634, the cam push rod 1635 remains stationary because one end is fixed in the lifting rotary cylinder pressure sleeve 1631. The right side slope of each groove of the three groove groups on the bottom surface of the cylindrical cam groove 16322 first contacts the cam push rod 1635. As the lifting rotary cylinder plunger rod 1634 continues to rise, the three groove groups slide along the right side slope of each groove to the bottom of each groove and contact the cam push rod 1635, causing the lifting rotary cylinder pressure rod 1632 to rotate counterclockwise by 20-25° while rising, and driving the positioning seat 164, positioning sleeve 165, copper ring 10 and piston rod 9 to rise synchronously and rotate counterclockwise by 20-25°.

[0101] When oil comes out from port three, hydraulic oil flows out from the chamber below the piston rod 1634 of the lifting rotary cylinder. The pressure of the hydraulic oil disappears, and the spring 1638 extends downward. Under the action of the weight of each component and the downward elastic force of the spring 1638, the piston rod 1634, the thrust ball bearing 1636, the lifting rotary cylinder pressure rod 1632, the positioning seat 164, the positioning sleeve 165, the copper ring 10, and the piston rod 9 descend until the groove group four on the top surface of the cylindrical cam groove 16322 contacts the cam push rod 1635.

[0102] During the descent of the lifting rotary cylinder plunger rod 1634, the cam push rod 1635 remains stationary. The right side slopes of each groove of the fourth groove group on the top surface of the cylindrical cam groove 16322 first contact the cam push rod 1635. As the lifting rotary cylinder plunger rod 1634 continues to descend, the fourth groove group slides down along the right side slopes of each groove to the bottom of each groove and contacts the cam push rod 1635. This causes the lifting rotary cylinder pressure rod 1632 to rotate counterclockwise by 20-25° while descending, and drives the positioning seat 164, positioning sleeve 165, copper ring 10 and piston rod 9 to descend synchronously and rotate counterclockwise by 20-25°.

[0103] Example 4, as Figure 7 , Figure 9 , Figure 10 As shown, the mold assembly 162 includes a mold shrinkage ring 1621 fixedly connected to the inner side of the main cylinder head 1611, a mold top block 1622 slidably overlapping the top surface of the main cylinder piston rod end cap 1614, and a mold top head 1623 fixed to the inner side of the mold top block 1622.

[0104] A mold pressing block 1624 is bolted to the top of the mold top block 1622 and the mold top head 1623. The upper half of the mold shrinking ring 1621 is an inclined surface, the inner side of the inclined surface is inclined surface one, and the outer side of the mold top block 1622 is inclined surface two. Inclined surface one and inclined surface two work together.

[0105] There are multiple mold top blocks 1622 and mold tops 1623, which are arranged in a circular pattern, and adjacent mold top blocks 1622 are connected by multiple springs.

[0106] Based on the above embodiments, when oil enters through port one and exits through port two, the piston rod 1613 of the main cylinder drives the mold top block 1622, the mold top head 1623, the copper ring 10 and the piston rod 9 to rise synchronously. The inclined surface 2 of the mold top block 1622 gradually overlaps with the inclined surface 1 of the mold shrinking ring 1621, and the mold top block 1622 and the mold top head 1623 gradually move radially closer to the copper ring 10, pressing the copper ring 10 into the groove of the piston rod 9. At this time, the spring between the mold top blocks 1622 is in a compressed state.

[0107] When oil flows out from port 1 and in through port 2, the piston rod 1613 of the main cylinder descends, and the inclined surface 2 of the mold top block 1622 and the inclined surface 1 of the mold shrinking ring 1621 gradually separate. Multiple springs between the mold top blocks 1622 extend, causing the mold top blocks 1622 and the mold top head 1623 to gradually disperse radially away from the copper ring 10.

[0108] The bottom surface of the mold top block 1622 slides and overlaps on the top surface of the main cylinder piston rod end cap 1614, so that the mold top block 1622 is supported by the main cylinder piston rod end cap 1614 in the radial direction. This effectively avoids the mold top block 1622 and the mold top head 1623 from tilting due to their own weight and spring load, thereby eliminating the indentation defects on the outer surface of the copper ring 10.

[0109] The mold pressure block 1624 is fixedly connected to the top of the mold top block 1622 and the mold top head 1623 by bolts. The mold top block 1622 and the mold top head 1623 are made of high-strength steel. When changing the mold, you only need to unscrew the bolts of the mold pressure block 1624 and replace the mold top head 1623. There is no need to replace the mold top block 1622. This makes mold changing convenient and saves costs.

[0110] Example 5, as Figures 3-5 As shown, the copper ring rotary table 15 includes a rotary table mounting plate 151 fixed to the hydraulic press frame 13, a hollow rotary table 153 fixed to the top surface of the rotary table mounting plate 151, and a rotary disk 154 connected above the hollow rotary table 153. A reduction motor 152 is fixedly connected to the bottom of the hollow rotary table 153. The reduction motor 152 drives the hollow rotary table 153 to rotate, which in turn drives the rotary disk 154 to rotate.

[0111] Multiple tooling base plates 157 are evenly fixed above the rotating disk 154. The tooling base plates 157 are two-layered. Multiple long guide shafts 156 are fixedly connected to the upper tooling base plate 157, and multiple short guide shafts 155 are fixed between the two tooling base plates 157. The long guide shafts 156 are threaded onto the first tooling base plate 157 to facilitate future maintenance and replacement of the tooling base plate 157 and the long guide shafts 156. The copper ring 10 to be pressed is placed on the first tooling base plate 157, and the long guide shafts 156 restrict the position of the copper ring 10.

[0112] The copper ring clamping and detection module 14 includes a module mounting frame 147 fixed to the hydraulic press frame 13, an X-axis 144 fixed to the module mounting frame 147, a Z-axis 145 slidably connected above the X-axis 144, and a Y-axis 143 slidably connected to the front side of the Z-axis 145. A right-angle bracket 146 is fixedly connected below the Z-axis 145. A slider is provided on the back of the right-angle bracket 146. The slider is slidably connected to the guide rail provided in front of the X-axis 144, thereby driving the Z-axis 145 to slide left and right on the X-axis 144.

[0113] A camera 142 is fixedly connected to the front of the Z-axis 145, and a gripper 141 is fixedly connected to the bottom of the Y-axis 143. Utilizing the coordinate mapping principle of machine vision (existing technology): the camera 142 captures the center coordinates of the copper ring 10 and the piston rod 9 from above, and calculates the center distance between them using an image processing algorithm (edge ​​detection + center fitting). When the deviation is greater than 0.05mm, the control system converts the pixel coordinates into spatial offsets in the robot's base coordinate system, driving the gripper 141 to grasp the copper ring 10 and translate it along the X and Y axes to compensate for the deviation, thus achieving precise alignment between the copper ring 10 and the piston rod 9.

[0114] A photoelectric sensor is fixedly connected to the hydraulic press frame 13 between the copper ring clamping and detection module 14 and the copper ring rotating table 15. For example... Figure 3 As shown, eight sets of copper rings 10 to be covered are evenly arranged above the rotating disk 154. The photoelectric sensor detects the bottommost copper ring 10 in the set of copper rings 10 closest to the cylinder assembly 16. When the gripper 141 grabs the copper rings 10, it grabs the set of copper rings 10 closest to the cylinder assembly 16 from top to bottom. When the bottommost copper ring 10 is grabbed by the gripper 141, the infrared light of the photoelectric sensor can no longer detect the copper ring 10, indicating that the set of copper rings 10 has been completely used. The photoelectric sensor sends a signal to the control system, and the control system controls the reduction motor 152 to rotate 45°, rotating the next set of copper rings 10 to be covered to the closest position to the cylinder assembly 16 for the gripper 141 to continue grabbing.

[0115] Example 6, as Figures 11-13 As shown, the oil immersion and air blowing tank 2 also includes an oil immersion tank body 21. There are two oil immersion stations 22, which are respectively set on both sides inside the oil immersion tank body 21. The air blowing station 23 is located above the middle of the oil immersion tank body 21. The air blowing station 23 is a cuboid structure with an opening on the top surface. An annular air knife 24 is fixedly connected to the top surface of the cuboid structure.

[0116] The oil immersion and degreasing tank 3 also includes an oil immersion tank body 31. There are two oil immersion stations 32, which are respectively arranged on both sides inside the oil immersion tank body 31. The degreasing station 33 is located above the middle of the oil immersion tank body 31 and is a rectangular plate.

[0117] The oil immersion process takes longer than the air blowing and degreasing processes. To speed up the oil immersion cycle, this embodiment uses two oil immersion tanks (21 and 31). The number of oil immersion tanks (21 and 31), air blowing station (23), and degreasing station (33) can be increased or decreased depending on the actual situation. The oil immersion and air blowing processes in the oil immersion and air blowing tank 2 are to dissolve and remove impurities and grease from the piston rod 9, ensuring the quality of the copper ring 10's coating. The oil immersion and degreasing processes in the oil immersion and degreasing tank 3 are to form a protective oil film on the surface of the piston rod 9 to prevent oxidation.

[0118] Positioning rings 25 are respectively provided in the middle of the oil immersion station 22, the oil immersion station 32, and the degreasing station 33, and an oil draining groove 26 is provided in the middle of the air blowing station 23. The positioning rings 25 and the oil draining groove 26 are for the robot 5 to position the piston rod 9 and then perform clamping.

[0119] The top plate 42 is provided with multiple openings 2 through the top and bottom, and the layer plate 43 is provided with multiple openings 3 through the top and bottom. There are two layer plates 43. Each layer plate 43 and the top plate 42 are separated and fixed by multiple upright plates 44 around their perimeters. Each layer plate 43 and the top plate 42 are also provided with multiple uprights in the middle. The thinner end of the piston rod 9 is placed in the opening 2.

[0120] Example 7, a production method for a piston rod guide ring overlay production line applied to any of the above-described production lines, comprising the following steps:

[0121] S1. Oil Immersion and Air Blowing: Robot 5 picks up the piston rod 9 to be pressed from the workpiece transfer frame 4 on one side of the oil immersion and air blowing tank 2 and places it into the oil immersion station 22 in the oil immersion and air blowing tank 2 for oil immersion treatment.

[0122] After the oil soaking is completed, robot 5 will pick up the piston rod 9 on the oil soaking station 22 and place it on the air blowing station 23 for air blowing treatment.

[0123] S2, Positioning: Robot 5 grips the piston rod 9 that has finished blowing on the blowing station 23 and places it on the positioning seat 164 and positioning slide sleeve 165 in the cylinder assembly 16. Then, the gripper 141 in the copper ring clamping and detection module 14 grips the copper ring 10 on the copper ring rotating table 15 and puts it on the piston rod 9 in the cylinder assembly 16. At the same time, the copper ring 10 is also placed above the positioning slide sleeve 165. At this time, the copper ring 10 is just aligned with the groove of the piston rod 9.

[0124] S3, Pressing: The control system controls the cylinder assembly 16 to press the copper ring 10 into the groove 2 of the piston rod 9;

[0125] S4. Oil immersion and degreasing: Robot 5 clamps the piston rod 9 that has been covered and pressurized to the second oil immersion station 32 in the oil immersion and degreasing tank 3 for oil immersion treatment. After the oil immersion is completed, Robot 5 clamps the piston rod 9 on the second oil immersion station 32 to the degreasing station 33 for degreasing treatment.

[0126] S5. Transfer: Robot 5 picks up the degreased piston rod 9 and places it on the workpiece transfer rack 4 on one side of the oil immersion degreasing tank 3 for storage, waiting for the next process to pick it up.

[0127] S2 also includes positioning detection and adjustment: After the copper ring 10 is sleeved on the piston rod 9 in the cylinder assembly 16, the camera 142 in the copper ring clamping detection module 14 detects the center distance between the copper ring 10 and the piston rod 9. If the center distance is ≤0.05mm, proceed to step S3; if the center distance is >0.05mm, the control system controls the gripper 141 in the copper ring clamping detection module 14 to adjust the position of the copper ring 10 until the center distance is ≤0.05mm, based on the center distance information fed back by the camera 142 in the copper ring clamping detection module 14.

[0128] Figure 9 The diagram shows the initial positions of the components of the hydraulic cylinder assembly 16 of the present invention. S3 includes:

[0129] S31. Oil enters through port 1 and exits through port 2. The piston rod 1613 of the main cylinder rises, driving the lifting rotary cylinder 163 to rise synchronously until the inclined surface 2 of the mold top block 1622 is completely in contact with the inclined surface 1 of the mold shrinking ring 1621. At the same time, the mold top block 1622 drives the mold top head 1623 to radially surround the copper ring 10 towards the direction of the copper ring 10, pressing the copper ring 10 into the groove 2 of the piston rod 9, thus completing the first pressing of the copper ring 10.

[0130] S32, oil outlet one, oil inlet two, main cylinder piston rod 1613 descends, driving lifting rotary cylinder 163 to descend synchronously to the initial position, the inclined surface two of mold top block 1622 and the inclined surface one of mold shrink ring 1621 are completely separated, at the same time, mold top block 1622 drives mold top head 1623 to radially disperse to the initial position away from copper ring 10;

[0131] S33, oil inlet three, lifting rotary cylinder plunger rod 1634 rises, driving lifting rotary cylinder pressure rod 1632 to rise until the top surface of step 16321 contacts the bottom surface of lifting rotary cylinder pressure sleeve 1631. At the same time, the groove group three on the bottom surface of cylindrical cam groove 16322 contacts cam push rod 1635, driving lifting rotary cylinder pressure rod 1632 and piston rod 9 to rotate counterclockwise 20-25°.

[0132] S34, oil outlet three, lifting rotary cylinder plunger rod 1634 descends, at the same time, the top surface groove group four of the cylindrical cam groove 16322 contacts the cam push rod 1635, driving the lifting rotary cylinder pressure rod 1632 and piston rod 9 to continue to rotate counterclockwise 20-25°;

[0133] S35. Repeat steps S31-S32 to perform a second pressing on the copper ring 10;

[0134] S36. Repeat steps S33-S35 (i.e., repeat steps S33, S34, S31, and S32 in sequence) to perform a third overlay on the copper ring 10.

[0135] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A piston rod guide ring cover pressing production line comprising a robot (5), an electrical cabinet (7), a piston rod (9), a copper ring (10), a control system, a robot control cabinet (6) and a hydraulic station (8) located in front of and on the right side of the electrical cabinet (7) respectively, one end of the piston rod (9) is provided with a groove, characterized in that, It also includes a copper ring hydraulic machine (1) on one side of the hydraulic station (8), the robot (5) is located in front of the copper ring hydraulic machine (1), the left and right sides of the robot (5) are respectively provided with oil immersion degreasing tank (3) and oil immersion blowing tank (2), one side of the oil immersion degreasing tank (3) and the oil immersion blowing tank (2) is respectively provided with a workpiece transfer frame (4); The copper ring hydraulic machine (1) comprises a hydraulic machine rack (13), an oil cylinder assembly (16) and a copper ring rotating table (15) fixed on the left half and the right half of the hydraulic machine rack (13) respectively, and a copper ring clamping detection module (14) located on one side of the oil cylinder assembly (16) and fixed on the top of the hydraulic machine rack (13); The oil cylinder assembly (16) comprises a main cylinder (161), a mold assembly (162) located in the main cylinder (161), and a jacking rotary cylinder (163); The oil immersion blowing tank (2) comprises an oil immersion station one (22) and a blowing station (23); The oil immersion degreasing tank (3) comprises an oil immersion station two (32) and a degreasing station (33); The workpiece transfer frame (4) comprises a transfer frame (41), a top plate (42) fixed on the top surface of the transfer frame (41), and a layer plate (43) fixed on the top plate (42); The main cylinder (161) comprises a main cylinder cylinder (1612), a main cylinder cylinder cover (1611) and a main cylinder mounting flange (1616) fixed on the top surface and the bottom surface of the main cylinder cylinder (1612) respectively, a main cylinder piston rod (1613) sliding up and down in the main cylinder cylinder (1612), a main cylinder piston (1615) and a main cylinder end flange (1617) fixed to the lower half of the outer side of the main cylinder piston rod (1613), the main cylinder end flange (1617) is fixed to the bottom of the main cylinder piston (1615), the main cylinder piston rod (1613) is fixedly connected with a main cylinder piston rod end cover (1614) above, and the main cylinder cylinder (1612) is provided with an oil port one and an oil port two, The jacking rotary cylinder (163) is located in the main cylinder piston rod (1613), the jacking rotary cylinder (163) comprises a jacking rotary cylinder cylinder (1633) and a jacking rotary cylinder cylinder bottom (1637), the bottom of the main cylinder piston rod (1613) and the bottom of the jacking rotary cylinder cylinder (1633) are respectively fixedly connected above the jacking rotary cylinder cylinder bottom (1637), The jacking rotary cylinder cylinder bottom (1637) is provided with an oil port three penetratingly.

2. A coated piston rod guide ring production line according to claim 1, characterized in that The jacking rotary cylinder cylinder (1633) is sequentially provided with a jacking rotary cylinder pressure rod (1632), a thrust ball bearing (1636) and a jacking rotary cylinder plunger rod (1634) sliding up and down from top to bottom inside the jacking rotary cylinder cylinder (1633); The jacking rotary cylinder cylinder (1633) is fixed with a jacking rotary cylinder pressure sleeve (1631) on the top, the jacking rotary cylinder pressure sleeve (1631) has a T-shaped outer shape, the T-shaped horizontal edge part is fixed above the jacking rotary cylinder cylinder (1633), the T-shaped vertical edge part is located inside the jacking rotary cylinder cylinder (1633), a plurality of cam lift pins (1635) are fixedly connected to the upper half of the T-shaped vertical edge part, and a groove one is arranged in the lower half of the T-shaped vertical edge part.

3. A coated piston rod guide ring production line according to claim 2, characterized in that The jacking rotary cylinder pressure rod (1632) is provided with a step (16321) at the bottom, and a circular cylindrical cam groove (16322) is arranged at the upper half, and the cam top rod (1635) is arranged in the cylindrical cam groove (16322) and cooperates with the cylindrical cam groove (16322); The spring (1638) is arranged in the groove one of the jacking rotary cylinder sleeve (1631). The displacement sensor (166) is fixedly connected to the middle part of the jacking rotary cylinder bottom (1637), penetrates the jacking rotary cylinder bottom (1637) up and down, and is arranged in the jacking rotary cylinder plunger rod (1634).

4. A coated piston rod guide ring production line according to claim 1, characterized in that The mold assembly (162) comprises a mold contraction ring (1621) fixedly connected to the inner side of the main cylinder cylinder cover (1611), a mold top block (1622) slidingly lapped on the top surface of the main cylinder piston rod end cover (1614), and a mold top head (1623) fixedly arranged in the inner side of the mold top block (1622), The mold top block (1622) and the mold top head (1623) are bolted to a mold pressing block (1624) at the top, the upper half of the mold contraction ring (1621) is a slope, the inner side of the slope is a slope one, the outer side of the mold top block (1622) is a slope two, and the slope one and the slope two cooperate.

5. A coated piston rod guide ring production line according to claim 1, characterized in that The copper ring rotating table (15) comprises a rotating table mounting plate (151) fixed to the hydraulic machine rack (13), a hollow rotating table (153) fixed to the top surface of the rotating table mounting plate (151), and a rotating disc (154) connected above the hollow rotating table (153), A plurality of tool bottom plates (157) are uniformly fixed above the rotating disc (154), the tool bottom plate (157) is two layers, a plurality of long guide shafts (156) are fixedly connected above the tool bottom plate (157) of the upper layer, and a plurality of short guide shafts (155) are fixed between the two layers of tool bottom plates (157); The copper ring clamping detection module (14) comprises a module mounting frame (147) fixed to the hydraulic machine rack (13), an X-axis (144) fixed to the module mounting frame (147), a Z-axis (145) slidingly connected above the X-axis (144), and a Y-axis (143) slidingly connected to the front side of the Z-axis (145), A camera (142) is fixedly connected to the front side of the Z-axis (145), and a clamping jaw (141) is fixedly connected to the bottom of the Y-axis (143); An optical sensor is fixedly connected to the hydraulic machine rack (13).

6. A coated piston rod guide ring production line according to claim 1, characterized in that The oil immersion blowing groove (2) further comprises an oil immersion groove body one (21), two oil immersion stations one (22) are arranged on both sides in the oil immersion groove body one (21), and the gas blowing station (23) is arranged above the middle part of the oil immersion groove body one (21); The oil immersion degreasing tank (3) further comprises an oil immersion tank body two (31), two oil immersion stations two (32) are respectively arranged on the two sides of the oil immersion tank body two (31), and the degreasing station (33) is arranged above the middle of the oil immersion tank body two (31), and the degreasing station (33) is a rectangular plate; The middle parts of the oil immersion station one (22), the oil immersion station two (32) and the degreasing station (33) are respectively provided with positioning rings (25), and the middle part of the blowing station (23) is provided with an oil discharge clamping groove (26); A plurality of openings two are arranged through the top plate (42) in the up-down direction, the layer plates (43) are two, each layer plate (43) and the top plate (42) are fixed by a plurality of vertical plates (44) around, and a plurality of vertical rods are arranged in the middle parts of each layer plate (43) and the top plate (42).

7. A production method applied to the piston rod guide ring cover press production line as claimed in any one of claims 1 to 6, characterized in that, The method comprises the following steps: S1, oil immersion and blowing: the robot (5) clamps the piston rod (9) to be covered and pressed on the workpiece transfer frame (4) on one side of the oil immersion and blowing tank (2) to the oil immersion station one (22) in the oil immersion and blowing tank (2) for oil immersion treatment, After the oil immersion is completed, the robot (5) clamps the piston rod (9) on the oil immersion station one (22) to the blowing station (23) for blowing treatment; S2, positioning: the robot (5) clamps the piston rod (9) on the blowing station (23) to the oil cylinder assembly (16), and then the copper ring clamping and detecting module (14) clamps the copper ring (10) on the copper ring rotating table (15) to be arranged on the piston rod (9) in the oil cylinder assembly (16); S3, covering and pressing: the control system controls the oil cylinder assembly (16) to cover and press the copper ring (10) into the second groove of the piston rod (9); S4, oil immersion and degreasing: the robot (5) clamps the piston rod (9) after the covering and pressing is completed to the oil immersion station two (32) in the oil immersion and degreasing tank (3) for oil immersion treatment, and after the oil immersion is completed, the robot (5) clamps the piston rod (9) on the oil immersion station two (32) to the degreasing station (33) for degreasing treatment; S5, transfer: the robot (5) clamps the piston rod (9) after the degreasing is completed to the workpiece transfer frame (4) on one side of the oil immersion and degreasing tank (3) for storage, and waits for the next process.

8. A method of production according to claim 7, wherein, In the S2, positioning detection and adjustment are further included: after the copper ring (10) is arranged on the piston rod (9) in the oil cylinder assembly (16), the copper ring clamping and detecting module (14) detects the distance between the center of the copper ring (10) and the piston rod (9), if the distance is less than or equal to 0.05 mm, the step S3 is entered; if the distance is greater than 0.05 mm, the control system controls the copper ring clamping and detecting module (14) to adjust the position of the copper ring (10) according to the distance information of the center of the copper ring (10) fed back by the copper ring clamping and detecting module (14) until the distance is less than or equal to 0.05 mm.

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