A guideway polishing apparatus and method of using the same

Abstract

The application discloses a guide rail polishing device, which comprises a polishing wheel group for polishing both sides of the guide rail in the width direction and a pressing mechanism for driving the polishing wheel group to adhere to the guide rail. The application also provides a method for using the guide rail polishing device. The guide rail polishing device can polish both sides of the guide rail, can ensure that the polishing wheel adheres to both sides of the guide rail during the polishing wheel abrasion, thereby ensuring the polishing efficiency and polishing effect of both sides of the guide rail, and can ensure that the new polishing wheel is replaced when the polishing wheel is excessively worn, thereby ensuring the effective operation of the guide rail polishing device.

Description

Technical Field

[0001] This invention relates to a guide rail polishing device and its method of use. Background Technology

[0002] During the production of guide rails, it is necessary to polish both sides of the guide rail in the width direction. Currently, polishing wheels are generally used to polish both sides of the guide rail in the width direction. However, the polishing wheel will wear down and gradually shrink in outer diameter during the polishing process, which will affect the polishing efficiency and polishing effect on both sides of the guide rail in the width direction. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a guide rail polishing device, comprising: a polishing wheel assembly for polishing both sides of a horizontally placed guide rail in the width direction, and a pressure application mechanism for driving the polishing wheel assembly to adhere to the guide rail; The polishing wheel set includes: a plurality of flat left polishing wheels arranged at equal intervals along the length of the guide rail, located on one side of the guide rail width direction (i.e., on the left side of the guide rail); and a plurality of flat right polishing wheels arranged at equal intervals along the length of the guide rail, located on the other side of the guide rail width direction (i.e., on the right side of the guide rail). The pressure applying mechanism includes: multiple left support seats corresponding to each left polishing wheel and rotatably connected to the corresponding left polishing wheel via bearings; multiple horizontally positioned left hydraulic cylinders corresponding to each left support seat, with piston rods perpendicular to the length direction of the guide rail and fixedly connected to the corresponding left support seat, driving the left support seats to move closer to or away from the guide rail; a left inlet branch pipe and a left return branch pipe respectively connected to the end of each left hydraulic cylinder away from the corresponding left support seat (i.e., the left end of each left hydraulic cylinder); a left inlet main pipe respectively connected to each left inlet branch pipe; a left return main pipe respectively connected to each left return branch pipe; and a left polishing wheel corresponding to each right polishing wheel and rotatably connected to the corresponding right polishing wheel via bearings. The polishing wheel is rotatably connected to multiple right support seats, each corresponding to a different right support seat. The piston rod is perpendicular to the length direction of the guide rail and fixed to the corresponding right support seat. Multiple horizontally placed right hydraulic cylinders drive the right support seats to move closer to or away from the guide rail. Each right hydraulic cylinder has a right inlet branch pipe and a right return branch pipe connected to the end away from the corresponding right support seat (i.e., the right end of each right hydraulic cylinder). A right inlet main pipe is connected to each right inlet branch pipe. A right return main pipe is connected to each right return branch pipe. A branch pipe connects both the left and right inlet main pipes to the storage tank. A manifold connects both the left and right return main pipes to the storage tank.

[0004] Preferably, the guide rail polishing device further includes a guiding device for guiding the flat guide rail (the guide rail is a straight guide rail) to translate along its length direction (i.e., translate along the front-to-back direction).

[0005] Preferably, the pressure application mechanism further includes: a left drive motor that corresponds one-to-one with each left support seat, is fixed on the corresponding left support seat, and drives the corresponding left polishing wheel to rotate; and a right drive motor that corresponds one-to-one with each right support seat, is fixed on the corresponding right support seat, and drives the corresponding right polishing wheel to rotate.

[0006] Preferably, the pressure application mechanism further includes: a left pressure sensor built into the end of each left hydraulic cylinder away from the corresponding left support (i.e., the left end of each left hydraulic cylinder), and a right pressure sensor built into the end of each right hydraulic cylinder away from the corresponding right support (i.e., the right end of each right hydraulic cylinder).

[0007] Preferably, the pressure application mechanism further includes: a left proximity switch that can be triggered by piston contact and is built into one end of each left hydraulic cylinder near the corresponding left support (i.e., the right end of each left hydraulic cylinder); and a right proximity switch that can be triggered by piston contact and is built into one end of each right hydraulic cylinder near the corresponding right support (i.e., the left end of each right hydraulic cylinder).

[0008] Preferably, the pressure application mechanism further includes: a left inlet valve respectively installed on each left inlet branch pipe, and a right inlet valve respectively installed on each right inlet branch pipe.

[0009] Preferably, the pressure application mechanism further includes: a left return valve respectively installed on each left return branch pipe, and a right return valve respectively installed on each right return branch pipe.

[0010] Preferably, the pressure application mechanism further includes: an inlet pump disposed on the diversion pipe and a return pump disposed on the manifold.

[0011] The present invention also provides a method of using the above-mentioned guide rail polishing device, including: Each left return valve, each right return valve, and the return pump remain normally closed; each left polishing wheel is driven by its corresponding left drive motor to maintain normal rotation, and each right polishing wheel is driven by its corresponding right drive motor to maintain normal rotation. The guiding device guides the horizontal guide rail (which is a straight guide rail) to translate along its length (i.e., translate along the front-to-back direction). Open all left and right inlet valves and the inlet pump. The inlet pump pumps out the hydraulic oil from the storage tank and pumps it into the left and right main inlet pipes through the branch pipes. Then, the hydraulic oil is pumped into each left hydraulic cylinder through each left inlet branch pipe and into each right hydraulic cylinder through each right inlet branch pipe. This causes the piston rod of each left hydraulic cylinder to extend (to the right) and drive the corresponding left polishing wheel to press against one side of the guide rail width direction (i.e., the left side of the guide rail), and causes the piston rod of each right hydraulic cylinder to extend (to the left) and drive the corresponding right polishing wheel to press against the other side of the guide rail width direction (i.e., the right side of the guide rail), until each left pressure sensor senses that the internal pressure of the corresponding left hydraulic cylinder has reached the predetermined pressure, and each right pressure sensor senses that the internal pressure of the corresponding right hydraulic cylinder has reached the predetermined pressure. Then, close all left and right inlet valves and the inlet pump. Each left polishing wheel continues to polish one side of the guide rail width direction (i.e., the left side of the guide rail), and each right polishing wheel continues to polish the other side of the guide rail width direction (i.e., the right side of the guide rail). Each left and right polishing wheel will wear down and gradually shrink in outer diameter during the polishing process; When the outer diameter of a certain left polishing wheel shrinks due to wear, causing the corresponding left pressure sensor to sense a decrease in the internal pressure of the corresponding left hydraulic cylinder, the inlet pump and the corresponding left inlet valve are turned on again to replenish hydraulic oil into the corresponding left hydraulic cylinder until the internal pressure of the corresponding left hydraulic cylinder is restored to the predetermined pressure, and then the inlet pump and the corresponding left inlet valve are turned off. When the outer diameter of a certain right polishing wheel shrinks due to wear, causing the corresponding right pressure sensor to sense a decrease in the internal pressure of the corresponding right hydraulic cylinder, the inlet pump and the corresponding right inlet valve are turned on again to replenish hydraulic oil into the corresponding right hydraulic cylinder until the internal pressure of the corresponding right hydraulic cylinder is restored to the predetermined pressure, and then the inlet pump and the corresponding right inlet valve are turned off. When a left polishing wheel is excessively worn and its outer diameter is excessively reduced, causing the corresponding left proximity switch to be triggered, the return pump and the corresponding left return valve are turned on. The return pump pumps the hydraulic oil out of the corresponding left hydraulic cylinder through the corresponding left return branch pipe and the left return main pipe, and returns the hydraulic oil to the storage tank through the manifold. Then, the left polishing wheel with the excessively reduced outer diameter is replaced and a new left polishing wheel is installed. After the new left polishing wheel is installed, the inlet pump and the corresponding left inlet valve are turned on again to replenish the hydraulic oil into the corresponding left hydraulic cylinder until the internal pressure of the corresponding left hydraulic cylinder is restored to the predetermined pressure. Then, the inlet pump and the corresponding left inlet valve are turned off. When a right polishing wheel experiences excessive wear and its outer diameter shrinks excessively, triggering the corresponding right proximity switch, the return pump and the corresponding right return valve are activated. The return pump pumps hydraulic oil from the corresponding right hydraulic cylinder through the corresponding right return branch pipe and the right return main pipe, and returns the hydraulic oil to the storage tank through the manifold. Then, the right polishing wheel with the excessively shrunk outer diameter is replaced and a new right polishing wheel is installed. After the new right polishing wheel is installed, the inlet pump and the corresponding right inlet valve are activated again to replenish hydraulic oil into the corresponding right hydraulic cylinder until the internal pressure of the corresponding right hydraulic cylinder is restored to the predetermined pressure. Then, the inlet pump and the corresponding right inlet valve are closed.

[0012] The advantages and beneficial effects of this invention are as follows: it provides a guide rail polishing device and its usage method; this invention can polish both sides of the guide rail; and it can ensure that the polishing wheels (left polishing wheel and right polishing wheel) remain close to both sides of the guide rail during the wear process of the polishing wheels (left polishing wheel and right polishing wheel), thereby ensuring the polishing efficiency and polishing effect on both sides of the guide rail; it can also ensure that when the polishing wheels (left polishing wheel and right polishing wheel) are excessively worn, new polishing wheels (new left polishing wheel and right polishing wheel) can be replaced, thereby ensuring the effective operation of the entire guide rail polishing device.

[0013] This invention has the following characteristics: 1) When the outer diameter of a certain left polishing wheel shrinks due to wear, causing the corresponding left pressure sensor to sense a decrease in the internal pressure of the corresponding left hydraulic cylinder, the present invention will restart the inlet pump and the corresponding left inlet valve to replenish hydraulic oil into the corresponding left hydraulic cylinder until the internal pressure of the corresponding left hydraulic cylinder is restored to the predetermined pressure, and then close the inlet pump and the corresponding left inlet valve; this ensures that the left polishing wheel remains in close contact with the guide rail side (i.e., the left side of the guide rail), thereby ensuring the polishing efficiency and polishing effect on the guide rail side (i.e., the left side of the guide rail); When the outer diameter of a right polishing wheel shrinks due to wear, causing the corresponding right pressure sensor to detect a decrease in the internal pressure of the corresponding right hydraulic cylinder, the present invention restarts the inlet pump and the corresponding right inlet valve to replenish hydraulic oil into the corresponding right hydraulic cylinder until the internal pressure of the corresponding right hydraulic cylinder is restored to the predetermined pressure, and then closes the inlet pump and the corresponding right inlet valve. This ensures that the right polishing wheel remains in close contact with the other side of the guide rail (i.e., the right side of the guide rail), thereby ensuring the polishing efficiency and polishing effect on the other side of the guide rail (i.e., the right side of the guide rail). As can be seen, the present invention can ensure that the polishing wheels (left polishing wheel and right polishing wheel) remain in close contact with both sides of the guide rail during the wear process of the polishing wheels (left polishing wheel and right polishing wheel), thereby ensuring the polishing efficiency and polishing effect on both sides of the guide rail.

[0014] 2) When a left polishing wheel experiences excessive wear and its outer diameter shrinks excessively, triggering the corresponding left proximity switch, the present invention activates the return pump and the corresponding left return valve. The return pump pumps hydraulic oil from the corresponding left hydraulic cylinder through the corresponding left return branch pipe and the left return main pipe, and returns the hydraulic oil to the storage tank through the manifold. Then, the left polishing wheel with the excessively shrunk outer diameter is replaced and a new left polishing wheel is installed. After the new left polishing wheel is installed, the inlet pump and the corresponding left inlet valve are activated again to replenish hydraulic oil into the corresponding left hydraulic cylinder until the internal pressure of the corresponding left hydraulic cylinder is restored to the predetermined pressure. Then, the inlet pump and the corresponding left inlet valve are closed. This ensures that a new left polishing wheel can be replaced when the left polishing wheel is excessively worn, thereby ensuring the effective operation of the left polishing wheel assembly. When a right polishing wheel experiences excessive wear and its outer diameter shrinks excessively, triggering the corresponding right proximity switch, the present invention activates the return pump and the corresponding right return valve. The return pump pumps hydraulic oil from the corresponding right hydraulic cylinder through the corresponding right return branch pipe and the right return main pipe, and returns the hydraulic oil to the storage tank through the manifold. Then, the right polishing wheel with the excessively shrunk outer diameter is replaced and a new right polishing wheel is installed. After the new right polishing wheel is installed, the inlet pump and the corresponding right inlet valve are activated again to replenish hydraulic oil into the corresponding right hydraulic cylinder until the internal pressure of the corresponding right hydraulic cylinder is restored. Then, the inlet pump and the corresponding right inlet valve are closed. This ensures that a new right polishing wheel can be replaced when the right polishing wheel is excessively worn, thereby ensuring the effective operation of the right polishing wheel assembly. As can be seen, the present invention can ensure that when the polishing wheels (left polishing wheel and right polishing wheel) are excessively worn, new polishing wheels (new left polishing wheel and right polishing wheel) can be replaced, thereby ensuring the effective operation of the entire guide rail polishing device. Attached Figure Description

[0015] Figure 1 This is a top view of the guide rail polishing device. Detailed Implementation

[0016] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0017] The specific technical solution of this invention is as follows: This invention provides a method for using a guide rail polishing device; like Figure 1 As shown, the guide rail polishing device includes: a guide device for guiding the flat guide rail 5 (the guide rail 5 is a straight guide rail) to translate along its length direction (i.e., translate along the front-back direction), a polishing wheel set for polishing both sides of the flat guide rail 5 in the width direction, and a pressure application mechanism for driving the polishing wheel set to contact the guide rail 5. The polishing wheel assembly includes: a plurality of flat left polishing wheels 11 located on one side of the width direction of the guide rail 5 (i.e., on the left side of the guide rail 5) and arranged at equal intervals along the length direction of the guide rail 5; and a plurality of flat right polishing wheels 21 located on the other side of the width direction of the guide rail 5 (i.e., on the right side of the guide rail 5) and arranged at equal intervals along the length direction of the guide rail 5. The pressure-applying mechanism includes: multiple left support seats 12 corresponding to each left polishing wheel 11 and rotatably connected to the corresponding left polishing wheel 11 via bearings; a left drive motor corresponding to each left support seat 12, fixed on the corresponding left support seat 12, and driving the corresponding left polishing wheel 11 to rotate; multiple horizontally positioned left hydraulic cylinders 13 corresponding to each left support seat 12, with piston rods perpendicular to the length direction of the guide rail 5, fixedly connected to the corresponding left support seat 12, and driving the left support seat 12 to move closer to or away from the guide rail 5; and a left proximity switch 14 built into one end of each left hydraulic cylinder 13 near the corresponding left support seat 12 (i.e., the right end of each left hydraulic cylinder 13), which can be triggered by piston contact. Each left hydraulic cylinder 13 has a built-in left pressure sensor 15 at the end away from the corresponding left support 12 (i.e., the left end of each left hydraulic cylinder 13). Each left hydraulic cylinder 13 has an external left inlet branch pipe 16 and a left return branch pipe 17 at the end away from the corresponding left support 12 (i.e., the left end of each left hydraulic cylinder 13). Each left inlet branch pipe 16 is equipped with a left inlet valve 18. Each left return branch pipe 17 is equipped with a left return valve 19. A left inlet main pipe 31 is connected to each left inlet branch pipe 16. A left return main pipe 41 is connected to each left return branch pipe 17. Multiple right polishing wheels 21 are rotatably connected to each right polishing wheel 21 via bearings. Support base 22; a right drive motor corresponding to each right support base 22 and fixed on the corresponding right support base 22 to drive the corresponding right polishing wheel 21 to rotate; multiple horizontally positioned right hydraulic cylinders 23 corresponding to each right support base 22, with piston rods perpendicular to the length direction of the guide rail 5 and fixed to the corresponding right support base 22 to drive the right support base 22 to move closer to or away from the guide rail 5; a right proximity switch 24 built into the end of each right hydraulic cylinder 23 near the corresponding right support base 22 (i.e., the left end of each right hydraulic cylinder 23) that can be triggered by piston contact; and a right pressure sensor 2 built into the end of each right hydraulic cylinder 23 away from the corresponding right support base 22 (i.e., the right end of each right hydraulic cylinder 23). 5. Each right hydraulic cylinder 23 is connected to a right inlet branch pipe 26 and a right return branch pipe 27 at the end away from the corresponding right support 22 (i.e., the right end of each right hydraulic cylinder 23). Each right inlet branch pipe 26 is equipped with a right inlet valve 28. Each right return branch pipe 27 is equipped with a right return valve 29. Each right inlet branch pipe 26 is connected to a right inlet main pipe 32. Each right return branch pipe 27 is connected to a right return main pipe 42. Each left inlet main pipe 31 and right inlet main pipe 32 are connected to a storage tank. Each inlet pump is installed on the inlet pipe. Each left return main pipe 41 and right return main pipe 42 are connected to a storage tank. Each return pump is installed on the manifold. The method of using the guide rail polishing device includes: Each left return liquid valve 19, each right return liquid valve 29, and the return liquid pump are kept normally closed; each left polishing wheel 11 is driven by the corresponding left drive motor to keep rotating normally, and each right polishing wheel 21 is driven by the corresponding right drive motor to keep rotating normally. The guiding device guides the horizontal guide rail 5 (the guide rail 5 is a straight guide rail) to move along its length (i.e., move along the front and back direction). Open each left inlet valve 18, each right inlet valve 28, and the inlet pump. The inlet pump pumps out the hydraulic oil from the storage tank and pumps it into the left inlet main pipe 31 and the right inlet main pipe 32 through the branch pipe. Then, it pumps the hydraulic oil into each left hydraulic cylinder 13 through each left inlet branch pipe 16 and into each right hydraulic cylinder 23 through each right inlet branch pipe 26. This causes the piston rod of each left hydraulic cylinder 13 to extend (to the right) and drive the corresponding left polishing wheel 11 to press against one side of the guide rail 5 in the width direction (i.e., the left side of the guide rail 5), and causes the piston rod of each right hydraulic cylinder 23 to extend (to the left). Extend and drive the corresponding right polishing wheel 21 to press against the other side of the guide rail 5 in the width direction (i.e., the right side of the guide rail 5) until each left pressure sensor 15 senses that the internal pressure of the corresponding left hydraulic cylinder 13 has reached the predetermined pressure and each right pressure sensor 25 senses that the internal pressure of the corresponding right hydraulic cylinder 23 has reached the predetermined pressure. Then close each left inlet valve 18, each right inlet valve 28 and the inlet pump. Each left polishing wheel 11 continues to polish one side of the guide rail 5 in the width direction (i.e., the left side of the guide rail 5), and each right polishing wheel 21 continues to polish the other side of the guide rail 5 in the width direction (i.e., the right side of the guide rail 5). Each left polishing wheel 11 and each right polishing wheel 21 will wear down and gradually shrink in outer diameter during the polishing process; When the outer diameter of a certain left polishing wheel 11 shrinks due to wear, causing the corresponding left pressure sensor 15 to sense a decrease in the internal pressure of the corresponding left hydraulic cylinder 13, the inlet pump and the corresponding left inlet valve 18 are turned on again to replenish hydraulic oil into the corresponding left hydraulic cylinder 13 until the internal pressure of the corresponding left hydraulic cylinder 13 is restored to the predetermined pressure, and then the inlet pump and the corresponding left inlet valve 18 are turned off. When the outer diameter of a certain right polishing wheel 21 is reduced due to wear, causing the corresponding right pressure sensor 25 to sense that the internal pressure of the corresponding right hydraulic cylinder 23 has decreased, the inlet pump and the corresponding right inlet valve 28 are turned on again to replenish hydraulic oil into the internal of the corresponding right hydraulic cylinder 23 until the internal pressure of the corresponding right hydraulic cylinder 23 is restored to the predetermined pressure, and then the inlet pump and the corresponding right inlet valve 28 are turned off. When a left polishing wheel 11 is excessively worn and its outer diameter is excessively reduced, causing the corresponding left proximity switch 14 to be triggered, the return pump and the corresponding left return valve 19 are turned on. The return pump pumps the hydraulic oil out of the corresponding left hydraulic cylinder 13 through the corresponding left return branch pipe 17 and the left return main pipe 41, and returns the hydraulic oil to the storage tank through the manifold. Then, the left polishing wheel 11 with the excessively reduced outer diameter is replaced and a new left polishing wheel 11 is installed. After the new left polishing wheel 11 is installed, the inlet pump and the corresponding left inlet valve 18 are turned on again to replenish the hydraulic oil inside the corresponding left hydraulic cylinder 13 until the internal pressure of the corresponding left hydraulic cylinder 13 is restored. Then, the inlet pump and the corresponding left inlet valve 18 are turned off. When a right polishing wheel 21 is excessively worn and its outer diameter is excessively reduced, causing the corresponding right proximity switch 24 to be triggered, the return pump and the corresponding right return valve 29 are turned on. The return pump pumps the hydraulic oil out of the corresponding right hydraulic cylinder 23 through the corresponding right return branch pipe 27 and the right return main pipe 42, and returns the hydraulic oil to the storage tank through the manifold. Then, the right polishing wheel 21 with excessively reduced outer diameter is replaced and a new right polishing wheel 21 is installed. After the new right polishing wheel 21 is installed, the inlet pump and the corresponding right inlet valve 28 are turned on again to replenish the hydraulic oil into the corresponding right hydraulic cylinder 23 until the internal pressure of the corresponding right hydraulic cylinder 23 is restored. Then, the inlet pump and the corresponding right inlet valve 28 are turned off.

[0018] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A guide rail polishing device, characterized in that, include: Polishing wheel set for polishing both sides of the guide rail in the width direction, and pressure application mechanism for driving the polishing wheel set to contact the guide rail; The polishing wheel assembly includes: a plurality of left polishing wheels located on one side of the guide rail width direction, and a plurality of right polishing wheels located on the other side of the guide rail width direction; The pressure application mechanism includes: multiple left support seats rotatably connected to each left polishing wheel; multiple left hydraulic cylinders fixedly connected to each left support seat; left inlet branch pipes and left return branch pipes respectively connected to the end of each left hydraulic cylinder away from the corresponding left support seat; left inlet main pipes respectively connected to each left inlet branch pipe; left return main pipes respectively connected to each left return branch pipe; multiple right support seats rotatably connected to each right polishing wheel; multiple right hydraulic cylinders fixedly connected to each right support seat; right inlet branch pipes and right return branch pipes respectively connected to the end of each right hydraulic cylinder away from the corresponding right support seat; right inlet main pipes respectively connected to each right inlet branch pipe; right return main pipes respectively connected to each right return branch pipe; a branch pipe connecting both the left and right inlet main pipes to a storage tank; and a manifold connecting both the left and right return main pipes to a storage tank.

2. The guide rail polishing device according to claim 1, characterized in that, The guide rail polishing device further includes a guide device for guiding the flat guide rail to translate along its length.

3. The guide rail polishing device according to claim 2, characterized in that, The pressure application mechanism further includes: a left drive motor that corresponds to each left support seat, is fixed on the corresponding left support seat, and drives the corresponding left polishing wheel to rotate; and a right drive motor that corresponds to each right support seat, is fixed on the corresponding right support seat, and drives the corresponding right polishing wheel to rotate.

4. The guide rail polishing device according to claim 3, characterized in that, The pressure application mechanism further includes: a left pressure sensor built into the end of each left hydraulic cylinder away from the corresponding left support, and a right pressure sensor built into the end of each right hydraulic cylinder away from the corresponding right support.

5. The guide rail polishing device according to claim 4, characterized in that, The pressure application mechanism further includes: a left proximity switch that can be triggered by piston contact, which is built into the end of each left hydraulic cylinder near the corresponding left support seat; and a right proximity switch that can be triggered by piston contact, which is built into the end of each right hydraulic cylinder near the corresponding right support seat.

6. The guide rail polishing device according to claim 5, characterized in that, The pressure application mechanism also includes: a left inlet valve installed on each left inlet branch pipe and a right inlet valve installed on each right inlet branch pipe.

7. The guide rail polishing device according to claim 6, characterized in that, The pressure application mechanism also includes: a left return valve installed on each left return branch pipe and a right return valve installed on each right return branch pipe.

8. The guide rail polishing device according to claim 7, characterized in that, The pressure application mechanism also includes: an inlet pump located on the branch pipe and a return pump located on the manifold.

9. The method of using the guide rail polishing device according to claim 8, characterized in that, include: Each left return valve, each right return valve, and the return pump remain normally closed; each left polishing wheel is driven by its corresponding left drive motor to maintain normal rotation, and each right polishing wheel is driven by its corresponding right drive motor to maintain normal rotation. The guiding device guides the horizontal guide rail to translate along its length. Open all left and right inlet valves and the inlet pump. The inlet pump pumps out the hydraulic oil from the storage tank and pumps it into the left and right main inlet pipes through the branch pipes. Then, the hydraulic oil is pumped into each left hydraulic cylinder through each left inlet branch pipe and into each right hydraulic cylinder through each right inlet branch pipe. This causes the piston rod of each left hydraulic cylinder to extend and drive the corresponding left polishing wheel to press against one side of the guide rail width direction, and causes the piston rod of each right hydraulic cylinder to extend and drive the corresponding right polishing wheel to press against the other side of the guide rail width direction, until each left pressure sensor senses that the internal pressure of the corresponding left hydraulic cylinder has reached the predetermined pressure, and each right pressure sensor senses that the internal pressure of the corresponding right hydraulic cylinder has reached the predetermined pressure. Then, close all left and right inlet valves and the inlet pump. Each left polishing wheel continues to polish one side of the guide rail width direction, and each right polishing wheel continues to polish the other side of the guide rail width direction. Each left and right polishing wheel will wear down and gradually shrink in outer diameter during the polishing process; When the outer diameter of a certain left polishing wheel shrinks due to wear, causing the corresponding left pressure sensor to sense a decrease in the internal pressure of the corresponding left hydraulic cylinder, the inlet pump and the corresponding left inlet valve are turned on again to replenish hydraulic oil into the corresponding left hydraulic cylinder until the internal pressure of the corresponding left hydraulic cylinder is restored to the predetermined pressure, and then the inlet pump and the corresponding left inlet valve are turned off. When the outer diameter of a certain right polishing wheel shrinks due to wear, causing the corresponding right pressure sensor to detect a decrease in the internal pressure of the corresponding right hydraulic cylinder, the inlet pump and the corresponding right inlet valve are turned on again to replenish hydraulic oil into the corresponding right hydraulic cylinder until the internal pressure of the corresponding right hydraulic cylinder is restored to the predetermined pressure, and then the inlet pump and the corresponding right inlet valve are turned off.

10. The method of using the guide rail polishing device according to claim 9, characterized in that: When a left polishing wheel is excessively worn and its outer diameter is excessively reduced, causing the corresponding left proximity switch to be triggered, the return pump and the corresponding left return valve are turned on. The return pump pumps the hydraulic oil out of the corresponding left hydraulic cylinder through the corresponding left return branch pipe and the left return main pipe, and returns the hydraulic oil to the storage tank through the manifold. Then, the left polishing wheel with the excessively reduced outer diameter is replaced and a new left polishing wheel is installed. After the new left polishing wheel is installed, the inlet pump and the corresponding left inlet valve are turned on again to replenish the hydraulic oil into the corresponding left hydraulic cylinder until the internal pressure of the corresponding left hydraulic cylinder is restored to the predetermined pressure. Then, the inlet pump and the corresponding left inlet valve are turned off. When a right polishing wheel experiences excessive wear and its outer diameter shrinks excessively, triggering the corresponding right proximity switch, the return pump and the corresponding right return valve are activated. The return pump pumps hydraulic oil from the corresponding right hydraulic cylinder through the corresponding right return branch pipe and the right return main pipe, and returns the hydraulic oil to the storage tank through the manifold. Then, the right polishing wheel with the excessively shrunk outer diameter is replaced and a new right polishing wheel is installed. After the new right polishing wheel is installed, the inlet pump and the corresponding right inlet valve are activated again to replenish hydraulic oil into the corresponding right hydraulic cylinder until the internal pressure of the corresponding right hydraulic cylinder is restored to the predetermined pressure. Then, the inlet pump and the corresponding right inlet valve are closed.

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