A hydraulic cylinder piston rod processing device

Abstract

The present application relates to the technical fields of piston rod processing, in particular to a kind of piston rod processing device of hydraulic oil cylinder, including pedestal, support and electric push rod, further including spiral support roller, positioning polishing component, motor one and motor two, the spiral support roller is set on support and symmetrically provided with two, two the spiral support roller between placement has the piston rod to be processed, the positioning polishing component is set in the output end of electric push rod, the positioning polishing component includes polishing roller, and electric push rod is powered on to drive polishing roller to descend to contact with piston rod when starting.The spiral support roller, polishing roller and the spiral scraping groove being opened in the surface of polishing roller of the present application are set, can drive piston rod to rotate and carry out self left-right movement in the process of polishing roller rotation, make polishing roller and piston rod carry out flexible clamping and carry out continuity polishing operation, need not stop when replacing new piston rod, greatly improve processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of piston rod processing technology, specifically to a piston rod processing device for hydraulic cylinders. Background Technology

[0002] In the intelligent manufacturing equipment industry, hydraulic cylinders are widely used. In order to ensure the output power of the hydraulic cylinder, after the piston rod is clamped by a clamp with a center or chuck to hold the workpiece, a machine tool or device designed for grinding the rotating surface of the workpiece is used to grind the cylindrical outer surface, thereby ensuring the accuracy of the piston rod.

[0003] When polishing the surface of a piston rod, clamping is necessary to ensure stability and polishing accuracy. However, clamping obstructs the piston rod's surface, requiring adjustment of the clamping position to achieve complete polishing, which significantly impacts processing efficiency. Existing technologies offer solutions to this problem, such as a hydraulic cylinder piston rod processing device and method (publication number CN120551865A). This device adjusts the clamping position of the piston rod during polishing, enabling omnidirectional polishing without machine downtime, thus improving processing efficiency. However, it still suffers from the following drawbacks: while avoiding downtime for clamping adjustments, it remains essentially a single-piece processing method. After polishing each piston rod, a machine stop is still required to replace it, further impacting efficiency and failing to meet the demands of large-scale, continuous production.

[0004] Therefore, in order to solve the above problems, a piston rod machining device for hydraulic cylinders is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a piston rod processing device for hydraulic cylinders, which solves the problem that after each piston rod is polished, the machine still needs to be stopped to replace it with a new one, which also affects processing efficiency. Through the use of a spiral support roller, a polishing roller, and spiral grooves on the surface of the polishing roller, the piston rod can be driven to rotate and move from left to right during the rotation of the polishing roller. This allows the polishing roller and piston rod to flexibly engage and perform continuous polishing operations without stopping the machine when replacing a new piston rod, greatly improving processing efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A piston rod processing device for a hydraulic cylinder includes a base, a bracket, and an electric push rod. The bracket is mounted on the base, and the electric push rod is mounted on the bracket. It also includes a spiral support roller, a positioning and polishing assembly, a first motor, and a second motor. Two spiral support rollers are symmetrically arranged on the bracket, with the piston rod to be processed placed between the two spiral support rollers. The positioning and polishing assembly is located at the output end of the electric push rod and includes a polishing roller. When the electric push rod is energized, it drives the polishing roller to move downwards until it contacts the piston rod. The first motor is mounted on the bracket and connected to the end of one of the spiral support rollers. When the first motor is energized, it drives the spiral support roller to rotate and move the piston rod to the right. The second motor is mounted on the positioning and polishing assembly. When the second motor is energized, it drives the polishing roller to rotate in the opposite direction at a lower speed than the spiral support roller.

[0008] Preferably, the positioning and polishing assembly further includes a U-shaped frame, a support member, a pressure roller, a U-shaped plate, and an elastic telescopic rod. The U-shaped frame is disposed at the output end of the electric push rod, the support member is disposed on the U-shaped frame, the polishing roller, the pressure roller, and the U-shaped plate are coaxially disposed on the support member, the polishing roller is disposed inside the U-shaped plate, the elastic telescopic rod is disposed between the U-shaped frame and the U-shaped plate, and the surface of the polishing roller is provided with a spiral scraping groove. The pitch of the spiral scraping groove is smaller than the pitch of the spiral support roller, and the spiral direction of the spiral scraping groove is opposite to the spiral direction of the spiral support roller.

[0009] It is known that when polishing the piston rod of a cylindrical hydraulic cylinder, a clamping device is usually set up to hold it in place to ensure stability and polishing accuracy. Although existing technology can adjust the clamping position of the piston rod according to the polishing progress, it still requires machine stoppage when changing different piston rods, which also limits processing efficiency. Therefore, this solution is adopted. By setting polishing rollers, pressure rollers, and elastic telescopic rods, the distance between the pressure roller and the two support rollers can remain constant after the piston rod to be polished is clamped. Furthermore, the spiral pattern on the surface of the spiral support roller can be used to move the piston rod to be polished from left to right when driving the piston rod to be polished to rotate, so that the piston rod automatically separates from the pressure roller after polishing. At the same time, there is no need to stop the machine during subsequent feeding. The piston rod to be polished can be placed directly between the two spiral support rollers from the left end and pushed to the right end. The left-to-right conveying force generated by the rotation of the two spiral support rollers can be used for polishing, which greatly improves processing efficiency.

[0010] Preferably, the pressure roller includes roller one and roller two, and roller one, polishing roller and roller two are arranged sequentially from left to right, and roller one has a tapered chamfer at its left end.

[0011] By adopting the above scheme, when the piston rod to be polished is inserted from the left end between roller one and the two spiral support rollers, the tapered chamfer can be used to avoid the left end of pressure roller one from obstructing the piston rod, ensuring the smooth placement of the piston rod and further improving processing efficiency.

[0012] Preferably, both ends of the polishing roller are provided with a second tapered chamfer, the angle of which is smaller than the angle of the first tapered chamfer.

[0013] As can be seen, to avoid scratching the seal at the end of the piston rod, polishing is also required, and the polishing needs to be done to form a rounded chamfer. The conventional polishing method is to polish the surface first and then polish the end separately, but this greatly increases the workload. Therefore, this solution is adopted. By setting two rounded chamfers at both ends of the polishing roller, the end of the piston rod to be polished can be automatically polished as it moves from left to right, greatly improving processing efficiency.

[0014] Preferably, the support includes three tubes arranged in segments from left to right: tube one, tube two, and tube three. The polishing roller, roller one, and roller two are all hollow. There are two tubes one, each located at one end of roller one. There are two tubes two, each located at one end of the polishing roller. There are two tubes three, each located at one end of roller two. Each of the two tubes two has a U-shaped rod, and each of the two U-shaped rods has a sleeve inserted into it. The two sleeves are connected to the corresponding tube one and tube three, respectively. The motor two is mounted on the U-shaped frame and connected to the tube three on the right end.

[0015] It is known that during the polishing process, friction causes a significant amount of heat to accumulate on the surface of the polishing roller. If this heat is not cooled in time, it will affect the polishing quality and the lifespan of the polishing roller. Conventional cooling methods include liquid cooling and air cooling. However, considering that the polishing roller rotates rapidly during polishing, the centrifugal force generated by the rotation will cause liquid to splash onto the surface, making liquid cooling unsuitable. Similarly, a large amount of metal debris is generated during polishing. If conventional air cooling is used, the debris will scatter, affecting the processing environment. Therefore, this solution is adopted. By hollowing out the polishing rollers (roller one and roller two) and incorporating tubes one, two, and three, the contact area between the polishing rollers (roller one and roller two) and the air is increased. This allows the polishing rollers (roller one and roller two) to automatically increase their heat dissipation range during rotation, ensuring both processing efficiency and the lifespan of the polishing rollers (roller one and roller two).

[0016] Preferably, the center of gravity of roller one, roller two, and polishing roller are all located on the side of themselves closest to the U-shaped rod.

[0017] By adopting the above scheme, when the machine is stopped and not processing, roller one, roller two, and polishing roller rotate to a fixed state under their own gravity, that is, both sleeves are located below the central axis of the polishing roller, and the central axis of the sleeves is in a vertical state. This allows the two U-shaped rods to be smoothly inserted into the corresponding sleeves when the electric push rod drives the U-shaped frame to move down to contact the piston rod to be polished with roller one and roller two, thereby ensuring the normal progress of the polishing operation.

[0018] Preferably, both roller one and roller two have multiple air inlets arranged in a circumferential array on their right ends, and pipe one is provided with a conduit on its left end. The conduit is connected to the U-shaped frame, and a rubber hose is provided on the left end of the conduit.

[0019] By adopting the above scheme, the air inlets at the ends of rollers 1 and 2 can be used to draw in air when they rotate, which accelerates the air flow rate inside the polishing roller, roller 1 and roller 2, further improving the heat dissipation effect. At the same time, some of the scattered metal debris can be adsorbed during the air drawing process, which improves the processing environment and further improves the processing efficiency.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. By using two spiral support rollers and a positioning polishing assembly, the piston rod to be polished can be positioned at a fixed height during the polishing process by the squeezing action of the positioning polishing assembly and the supporting action of the two spiral support rollers. Furthermore, as the spiral support rollers rotate, they can drive the piston rod to move from left to right while in contact with the polishing rollers, thereby achieving automatic and continuous polishing of the piston rod surface and effectively improving processing efficiency.

[0022] 2. By using the positioning and polishing components, the flexible linkage rod can be used to achieve flexible engagement between the polishing roller and the piston rod. During the contact and separation process between the piston rod and the polishing roller, the ends of the piston rod are polished by the tapered chamfers at both ends of the polishing roller. This achieves overall polishing of the piston rod without the need for separate polishing of the piston rod ends, further improving processing efficiency.

[0023] 3. By hollowing out the polishing rollers, roller one, and roller two, the contact range between the polishing rollers, roller one, and roller two and the air is increased. At the same time, the air inlets at the ends of rollers one and two increase the internal airflow velocity when rollers one and roller two rotate. This improves the heat dissipation effect and can also suck up some of the scattered metal debris. While ensuring continuous polishing operation, it can also cool down the polishing rollers, roller one, and roller two, thereby ensuring the polishing quality of the piston rod. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the connection structure between the electric push rod and the positioning and polishing assembly of the present invention;

[0026] Figure 3 For the present invention Figure 2 A schematic diagram showing the connection structure between the polishing roller, pressure roller one, and pressure roller two.

[0027] Figure 4 For the present invention Figure 2 The front view;

[0028] Figure 5 For the present invention Figure 2 Another structural diagram from another perspective;

[0029] Figure 6 For the present invention Figure 5 A cross-sectional view of the connection structure between the polishing roller, pressure roller one, and pressure roller two.

[0030] In the diagram: 1. Base; 2. Bracket; 3. Electric push rod; 4. Spiral support roller; 5. Positioning polishing assembly; 51. Polishing roller; 511. Spiral scraper; 512. Conical chamfer two; 52. U-shaped frame; 53. Support component; 531. Pipe one; 5311. Conduit; 5312. Rubber hose; 532. Pipe two; 5321. U-shaped rod; 5322. Sleeve; 533. Pipe three; 54. Pressure roller; 541. Roller one; 5411. Conical chamfer one; 542. Roller two; 543. Air inlet; 55. U-shaped plate; 56. Elastic telescopic rod; 6. Motor one; 7. Motor two; 8. Piston rod. Detailed Implementation

[0031] 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.

[0032] Please see Figures 1 to 6 This invention provides a piston rod processing device for hydraulic cylinders, the technical solution of which is as follows:

[0033] For details, please refer to Figure 1A processing device for piston rod 8 of a hydraulic cylinder includes a base 1, a bracket 2, and an electric push rod 3. The bracket 2 is mounted on the base 1, and the electric push rod 3 is mounted on the bracket 2. The device also includes a spiral support roller 4, a positioning and polishing assembly 5, a first motor 6, and a second motor 7. Two spiral support rollers 4 are mounted on the bracket 2 and are symmetrically arranged. The piston rod 8 to be processed is placed between the two spiral support rollers 4. The first motor 6 is mounted on the bracket 2 and connected to the end of one of the spiral support rollers 4. When the first motor 6 is powered on, it drives the spiral support roller 4 to rotate. When the spiral support roller 4 rotates, it uses friction to drive the piston rod 8 to rotate. During the rotation, the spiral pattern drives the piston rod 8 to move from left to right, thereby realizing continuous polishing of the surface of the piston rod 8. The spiral helix angle of the spiral pattern on the surface of the spiral support roller 4 is set to 5° to 10° to extend the rightward movement time of the piston rod 8 when the spiral support roller 4 rotates rapidly.

[0034] As one embodiment of the present invention, refer to Figure 1 and Figure 2 The positioning and polishing assembly 5 is located at the output end of the electric push rod 3. The positioning and polishing assembly 5 includes a polishing roller 51. When the electric push rod 3 is powered on, it drives the polishing roller 51 to move down to contact the piston rod 8. The positioning and polishing assembly 5 also includes a U-shaped frame 52, a support member 53, a pressure roller 54, a U-shaped plate 55, and an elastic telescopic rod 56. The U-shaped frame 52 is located at the output end of the electric push rod 3. The support member 53 is located on the U-shaped frame 52. The polishing roller 51, the pressure roller 54, and the U-shaped plate 55 are coaxially located on the support member 53. The polishing roller 51 is located inside the U-shaped plate 55. The elastic telescopic rod 56 is located between the U-shaped frame 52 and the U-shaped plate 55. The surface of the polishing roller 51 is provided with a spiral scraping groove 511. The pitch of the spiral scraping groove 511 is smaller than the pitch of the spiral support roller 4. The spiral direction of the spiral scraping groove 511 is opposite to the spiral direction of the spiral support roller 4. The motor 7 is located on the positioning and polishing assembly 5.

[0035] Under the above-mentioned conditions, the electric push rod 3 is activated. The output end of the electric push rod 3 drives the U-shaped frame 52 to move downward. Since the polishing roller 51 and the pressure roller 54 are both mounted on the U-shaped frame 52 via the support member 53, the U-shaped frame 52 will drive the polishing roller 51 and the pressure roller 54 to move downward until the polishing roller 51 and the pressure roller 54 have both moved down to contact the piston rod 8. At this time, the first motor 6 and the second motor 7 are activated. While the piston rod 8 moves from left to right, the polishing roller 51 rotates in the opposite direction to the piston rod 8 at a speed lower than that of the spiral support roller 4, performing automatic polishing on the surface of the piston rod 8. To obtain the ideal polishing effect and avoid overheating, the rotational speed of the polishing roller 51 is preferably the rotational speed of the spiral support roller 4. Within the range of 60% to 90%, sufficient relative linear velocity can be ensured for effective polishing, while frictional heat generation can be controlled to ensure the stability of processing quality. During the polishing process, the spiral scraper groove 511 scrapes away the protrusions or debris adhering to the surface of the piston rod 8. The scraped debris can enter the interior of the spiral scraper groove 511 and fall off automatically under its own gravity, preventing the debris from re-adhering to the surface of the piston rod 8 and causing secondary damage. At the same time, under the action of the elastic telescopic rod 56, flexible contact between the polishing roller 51 and the piston rod 8 can be achieved, avoiding over-cutting during polishing, thereby ensuring polishing quality.

[0036] As one embodiment of the present invention, refer to Figure 3 and Figure 4 The pressure roller 54 includes roller 1 541 and roller 2 542. The surfaces of roller 1 541 and roller 2 542 are mirror polished to reduce the friction between roller 1 541 and roller 2 542 and piston rod 8. Roller 1 541, polishing roller 51 and roller 2 542 are arranged sequentially from left to right. Roller 1 541 has a tapered chamfer 1 5411 at its left end. Both ends of polishing roller 51 have tapered chamfer 2 512. The angle of tapered chamfer 2 512 is smaller than the angle of tapered chamfer 1 5411.

[0037] Under the above-mentioned conditions, when replacing the piston rod 8, one end of the piston rod 8 is placed between the two spiral support rollers 4, and pushed from left to right along the central axis of the piston rod 8, so that the right end of the piston rod 8 moves to below roller 541 and is not blocked by the left end of roller 541. As roller 541 and the two spiral support rollers 4 rotate, the piston rod 8 gradually moves to the position of the second tapered chamfer 512 at the left end of polishing roller 51. Under the action of the elastic telescopic rod 56, the second tapered chamfer 512 at the left end of polishing roller 51 will be positioned against the right end of the piston rod 8. During the polishing process, as the piston rod 8 continues to move to the right, the elastic telescopic rod 56 gradually retracts (i.e., the polishing roller 51 moves upward) until the surface of the polishing roller 51 is tangent to the surface of the piston rod 8, thereby achieving the polishing operation on the surface of the piston rod 8. When the left end of the piston rod 8 moves to the conical chamfer 512 at the right end of the polishing roller 51, the elastic telescopic rod 56 gradually returns to its original position (i.e., the polishing roller 51 moves downward), thus enabling the polishing operation on the left end of the piston rod 8. This eliminates the need for separate polishing of both ends of the piston rod 8, greatly improving processing efficiency.

[0038] As one embodiment of the present invention, refer to Figure 4 , Figure 5 and Figure 6 The support member 53 includes three tubes 531, 532, and 533 arranged sequentially from left to right. The polishing rollers 51, 541, and 542 are all hollow. There are two tubes 531, which are respectively located at both ends of the roller 541. There are two tubes 532, which are respectively located at both ends of the polishing roller 51. There are two tubes 533, which are respectively located at both ends of the roller 542. Each of the two tubes 532 is provided with a U-shaped rod 5321. Each of the two U-shaped rods 5321 is connected with a sleeve 5322. The two sleeves 5322 are respectively connected to the corresponding tubes 531 and 533. The motor 7 is set on the U-shaped frame 52 and connected to the tube 533 on the right end. The center of gravity of the rollers 541, 542, and polishing roller 51 is set on the side of themselves close to the U-shaped rod 5321.

[0039] Under the above-mentioned settings, the rigid connection between the polishing roller 51 and roller 1 541 and roller 2 542 can be achieved by using the insertion action between the two U-shaped rods 5321 and the corresponding sleeves 5322. Thus, when the motor 2 drives the tube 3 533 to rotate, the roller 1 541, roller 2 542 and polishing roller 51 can be rotated synchronously. During the polishing process, the stability of the piston rod 8 is ensured by roller 1 541, roller 2 542 and the two spiral support rollers 4, thereby ensuring the polishing quality and processing efficiency. Furthermore, the hollow setting of the polishing roller 51 increases the heat dissipation range while polishing, further improving the processing efficiency on the basis of ensuring the polishing quality.

[0040] As one embodiment of the present invention, refer to Figure 6 Both roller 1 541 and roller 2 542 have multiple air inlets 543 arranged in a circumferential array on their right ends. The central axis of the air inlets 543 is not parallel to the central axis of roller 1 541 and roller 2 542. The multiple air inlets 543 are combined to form a structure similar to fan blades. When roller 1 541 and roller 2 542 rotate, they can use the air inlets 543 to draw in external air, allowing external air to enter the interior of roller 1 541 and roller 2 542, accelerating the airflow inside the polishing roller 51, and further improving the heat dissipation effect. The left end of tube 1 531 is rotatably provided with a guide tube 5311 through a sealed bearing. The guide tube 5311 is connected to the U-shaped frame 52 to prevent the guide tube 5311 from rotating with tube 1 531 and to prevent the rubber hose 5312 from getting tangled. The left end of the guide tube 5311 is provided with a rubber hose 5312 for discharging the drawn-in metal debris.

[0041] Working principle:

[0042] When polishing the first piston rod 8, the piston rod 8 is first placed between the two spiral support rollers 4 and roller 541. The electric push rod 3 is started. The output end of the electric push rod 3 drives the U-shaped frame 52 to move down. During the downward movement of the U-shaped frame 52, roller 541, roller 542 and polishing roller 51 move down synchronously. When roller 541 contacts the piston rod 8 and the pressure reaches the set value (the set value is the squeezing force of the pressure roller 54 on a pair of piston rods 8 during the polishing process, and the pressure value can be monitored by the pressure sensor), motor 6 and motor 7 are started.

[0043] When motor 6 is working, its output end drives the corresponding spiral support roller 4 to rotate. Another spiral support roller 4 rotates in the opposite direction under the friction of piston rod 8, thus forming a stable double-sided support for piston rod 8. During the rotation of this spiral support roller 4, the piston rod 8 is driven to rotate through the friction between it and the piston rod 8. Simultaneously, the spiral pattern on the surface of the spiral support roller 4 drives the piston rod 8 to move from left to right. When motor 7 rotates, it drives roller 2 542 to rotate through the corresponding tube 3 533. The synchronous rotation of roller 1 541, roller 2 542, and polishing roller 51 is achieved through the insertion of two U-shaped rods 5321 and the corresponding sleeves 5322. When the right end of piston rod 8 and the tapered shape of the left end of polishing roller 51 are aligned... When the second chamfer 512 contacts, the second conical chamfer 512 will polish the right end of the piston rod 8 under the rotation of the polishing roller 51. As the piston rod 8 continues to move to the right, the polishing roller 51 will move upward after being squeezed until the surface of the polishing roller 51 is tangent to the surface of the piston rod 8, thereby polishing the surface of the piston rod 8. When the piston rod 8 moves to the point where its left end contacts the second conical chamfer 512 at the right end of the polishing roller 51, the elastic force of the elastic telescopic rod 56 will squeeze the U-shaped plate 55, causing the U-shaped plate 55 to drive the polishing roller 51 to move downward. During the rotation of the polishing roller 51, the left end of the piston rod 8 will be polished. There is no need to polish both ends separately after polishing the surface of the piston rod 8, which greatly improves the polishing efficiency.

[0044] After one piston rod 8 is polished, another piston rod 8 to be polished is placed on two spiral support rollers 4, and the piston rod 8 is pushed to the right until it moves below roller 1 541. Since the height of roller 1 541 and roller 2 542 is fixed, and roller 1 541, roller 2 542 and polishing roller 51 are in a continuous rotating state, the piston rod 8 can be driven to rotate and move from left to right during the rotation of the spiral support roller 4. Thus, the polishing operation of the new piston rod 8 can be carried out without stopping the machine, which further improves the processing efficiency.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piston rod processing device for a hydraulic cylinder, comprising a base (1), a bracket (2), and an electric push rod (3), characterized in that: It also includes a spiral support roller (4), a positioning polishing assembly (5), a motor one (6) and a motor two (7). The spiral support roller (4) is set on the bracket (2) and there are two symmetrically arranged. The piston rod (8) to be processed is placed between the two spiral support rollers (4). The positioning polishing assembly (5) is set at the output end of the electric push rod (3). The positioning polishing assembly (5) includes a polishing roller (51). When the electric push rod (3) is powered on, it drives the polishing roller (51) to move down to contact the piston rod (8). The motor one (6) is set on the bracket (2) and connected to the end of one of the spiral support rollers (4). When the motor one (6) is powered on, it drives the spiral support roller (4) to drive the piston rod (8) to rotate and move to the right. The motor two (7) is set on the positioning polishing assembly (5). When the motor two (7) is powered on, it drives the polishing roller (51) to rotate in the opposite direction at a speed lower than that of the spiral support roller (4). The positioning and polishing assembly (5) further includes a U-shaped frame (52), a support member (53), a pressure roller (54), a U-shaped plate (55), and an elastic telescopic rod (56). The U-shaped frame (52) is located at the output end of the electric push rod (3). The support member (53) is located on the U-shaped frame (52). The polishing roller (51), the pressure roller (54), and the U-shaped plate (55) are coaxially located on the support member (53). The polishing roller (51) is located inside the U-shaped plate (55). The elastic telescopic rod (56) is located between the U-shaped frame (52) and the U-shaped plate (55). The surface of the polishing roller (51) is provided with a spiral scraping groove (511). The spiral direction of the spiral scraping groove (511) is opposite to the spiral direction of the spiral support roller (4). The pressure roller (54) includes roller one (541) and roller two (542). Roller one (541), polishing roller (51) and roller two (542) are arranged sequentially from left to right. Roller one (541) has a tapered chamfer one (5411) at its left end. Both ends of the polishing roller (51) are provided with a second conical chamfer (512), and the angle of the second conical chamfer (512) is smaller than the angle of the first conical chamfer (5411); The support member (53) includes a tube 1 (531), a tube 2 (532) and a tube 3 (533) arranged sequentially from left to right. The polishing roller (51), roller 1 (541) and roller 2 (542) are all hollow. There are two tubes 1 (531) respectively located at both ends of roller 1 (541). There are two tubes 2 (532) respectively located at both ends of polishing roller (51). There are two tubes 3 (533) respectively located at both ends of roller 2 (542). Each of the two tubes 2 (532) is provided with a U-shaped rod (5321). Each of the two U-shaped rods (5321) is inserted with a sleeve (5322). The two sleeves (5322) are respectively connected to the corresponding tube 1 (531) and tube 3 (533). The motor 2 (7) is located on the U-shaped frame (52) and connected to the tube 3 (533) on the right end. The center of gravity of roller one (541), roller two (542) and polishing roller (51) is set on the side of themselves closest to the U-shaped rod (5321).

2. The piston rod processing device for a hydraulic cylinder according to claim 1, characterized in that: The pitch of the spiral scraper (511) is smaller than the pitch of the spiral support roller (4).

3. The piston rod processing device for a hydraulic cylinder according to claim 1, characterized in that: The right ends of roller one (541) and roller two (542) are each arranged with multiple air inlets (543) in a circumferential array. The left end of pipe one (531) is provided with a conduit (5311). The conduit (5311) is connected to the U-shaped frame (52). The left end of the conduit (5311) is provided with a rubber hose (5312).

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