A stainless steel product inner circle polishing device

Abstract

The present invention relates to the technical field of inner circle polishing, and discloses an inner circle polishing device for stainless steel products. The device solves the problem that the existing inner circle polishing device for stainless steel products has poor polishing effect and is inconvenient to complete the polishing operation at one time when facing products with complex inner wall shapes. The device pushes the friction wheel assembly to fit the inner surface of the product through a support assembly. A measuring assembly for detecting the inclination of the inner surface of the product along the forward direction is provided on one side of the support assembly (34). After the inclination of the inner surface of the product is measured by the measuring assembly, the telescopic member is controlled to make the assembly frame tilt accordingly at the corresponding position, so as to promote the friction wheel assembly to fit the inner surface of the product, thereby enabling the friction wheel assembly to automatically perform efficient and high-quality grinding and polishing on the composite surface of the product during movement.

Description

Technical Field

[0001] The invention relates to the technical field of inner circle polishing, in particular to an inner circle polishing device for stainless steel products. Background Art

[0002] Stainless steel product internal polishing equipment is a device specifically designed to polish the inner surface of stainless steel products. However, in actual application, existing polishing equipment has certain limitations when it comes to stainless steel products with large inner diameters and complex inner wall shapes (hereinafter referred to as products).

[0003] For example, a common internal polishing device typically consists of a fixture, a slide mechanism, and a friction mechanism. The fixture secures the product and drives it to rotate at a low speed. The slide mechanism supports and moves the friction mechanism, allowing it to penetrate the interior of the product. The friction mechanism consists of a rotating shaft that extends into the interior of the product, with a friction wheel at its end. By rotating the friction wheel against the product's inner wall at high speed, the product rotates at a low speed, effectively polishing the inner surface. This device is particularly effective when polishing products with a single cylindrical inner surface.

[0004] However, when faced with products with composite inner surfaces, such as large and small air ducts, cookware, etc., whose inner walls are composed of cylindrical and conical surfaces, and the inner diameters of different areas are also different, existing inner circle polishing devices are unable to cope with them. For surfaces with conical inner circles, due to the fixed shape and size of the friction wheel, it is difficult to completely fit the conical surface, resulting in poor polishing effect, or even ineffective polishing. At the same time, for cylindrical inner surfaces with different inner diameters, existing devices cannot achieve one-time polishing. The position and size of the friction wheel need to be adjusted multiple times, which not only increases the complexity of the operation, but also reduces production efficiency, making it difficult to meet the requirements of high-efficiency and high-quality polishing in industrial production. Summary of the Invention

[0005] The purpose of the present invention is to provide a stainless steel product inner circle polishing device, which solves the problem that the existing stainless steel product inner circle polishing device has poor polishing effect and is inconvenient to complete the polishing operation in one go when facing products with complex inner wall shapes.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a stainless steel product inner circle polishing device, comprising:

[0007] The clamping mechanism is used to assemble the product and drive the product to rotate around its own axis;

[0008] The slide mechanism is arranged on one side of the clamping mechanism, and includes a slide seat and a slide table on the slide seat that slides in a controlled manner;

[0009] The polishing mechanism includes a deep frame assembled on one side of the slide, a support assembly is provided at the end of the deep frame, a friction wheel assembly for rubbing the inner surface of the product is assembled on the lower side of the support assembly, the support assembly pushes the friction wheel assembly to fit the inner surface of the product, and a measuring assembly is provided on one side of the support assembly to detect the inclination of the inner surface of the product along the forward direction. The support assembly includes a support frame and an assembly frame rotatably assembled on the lower side of the support frame, the friction wheel assembly is rotatably assembled on the assembly frame, and a telescopic member 1 for controlling the inclination angle of the assembly frame is provided on one side of the support frame. The telescopic member 1 controls the assembly frame to tilt accordingly at the corresponding position based on the inclination of the inner surface of the product measured by the measuring assembly, so as to enable the friction wheel assembly to fit appropriately with the inner surface of the product.

[0010] As a further description of the above technical solution: a drive shaft is rotatably arranged inside the deep frame, one end of the drive shaft is connected to the friction wheel assembly through a telescopic coupling, a motor 1 is arranged on the slide, and the output end of the motor 1 is coaxially connected to the other end of the drive shaft.

[0011] As a further description of the above technical solution: the support assembly also includes a sliding rod 1 fixedly arranged on the upper side of the support frame, the sliding rod 1 is vertically slidably assembled at the end of the deep frame, and the end of the deep frame is also fixedly assembled with a telescopic member 2, and the output end of the telescopic member 2 is used to push the sliding rod 1 up and down.

[0012] As a further description of the above technical solution: the output end of the second telescopic member is fixedly equipped with a tension sensor, the upper side of the tension sensor is fixedly connected to a spring 1, the upper end of the sliding rod 1 is fixedly connected to a connecting plate, and the upper end of the spring 1 is fixedly connected to the lower surface of the connecting plate.

[0013] As a further description of the above technical solution: a pair of clamps are fixedly provided in the middle of the assembly frame, and the clamps rotate and assemble the friction wheel assembly through bearings provided on the inner sides.

[0014] As a further description of the above technical solution: the assembly frame is provided with an assembly block on the side close to the product, the measuring component includes a slide bar 2 vertically slidingly arranged on the assembly block, the surface of the slide bar 2 is provided with a spring 2 for pushing the slide bar 2 to slide downward, the lower end of the slide bar 2 is rotatably provided with a rotating plate, the lower side of the rotating plate is equipped with a pair of ball wheels, the lower side of the slide bar 2 is also rotatably equipped with a displacement sensor, and the output end of the displacement sensor is rotatably connected to the end of the rotating plate away from the slide bar 2.

[0015] As a further description of the above technical solution: a bracket is fixedly provided on the upper surface of the assembly block, the bracket is located on one side of the second slide bar, a guide wheel is provided at the upper end of the bracket, a second motor is provided at the lower end of the bracket, the output end of the second motor is connected to a winding disk, and a pull rope is connected to the upper end of the second slide bar, and the pull rope is wound around the guide wheel and wound on the inside of the winding disk.

[0016] As a further description of the above technical solution: a coil spring is further provided on one side of the winding drum, and under normal conditions, the coil spring drives the winding drum to have an elastic rotation tendency to keep the pull rope in a tensioned state.

[0017] As a further description of the above technical solution: the friction wheel assembly includes a support layer, a fixed sleeve on the outer surface of the support layer is provided with a rotating seat, a fixed sleeve on the outer surface of the rotating seat is provided with a friction belt, both ends of the central axis of the support layer are sleeved on the inner side of a pair of bearings, and one end of the telescopic coupling is fixedly connected to one end of the central axis of the support layer.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. The control unit controls the telescopic member to tilt the assembly frame at the corresponding position based on the inclination of the inner surface of the product measured by the measuring component, so that the friction wheel assembly fits the inner surface of the product. In this way, the friction wheel assembly can automatically perform efficient and high-quality grinding and polishing on the composite surface of the product during movement.

[0020] 2. By configuring the tension sensor and spring 1, spring 1 elastically pulls slide bar 1, forcing the friction wheel assembly to remain pressed against the inclined surface. Simultaneously, the tension sensor detects the elastic force of spring 1 as it is stretched by telescopic member 2, maintaining the elastic force of spring 1 within an appropriate range. Furthermore, the pressure of the friction wheel assembly on the inner surface of the product is also maintained within an appropriate range, improving the overall quality of grinding and polishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the planar structure of the polishing mechanism of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the polishing mechanism of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the support assembly of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the friction wheel assembly of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the support assembly and the measuring assembly of the present invention;

[0027] Figure 7 For the present invention Figure 6 A is an enlarged schematic diagram;

[0028] Figure 8 For the present invention Figure 6 A magnified schematic diagram of B.

[0029] In the figure: 10, slide mechanism; 11, slide seat; 12, slide; 13, motor 1; 20, clamping mechanism; 21, machine table; 22, support wheel; 23, clamping wheel; 30, polishing mechanism; 31, deep rack; 32, drive shaft; 321, telescopic coupling; 33, friction wheel assembly; 331, friction belt; 332, support layer; 333, rotating seat; 34, support assembly; 341, support frame; 342, assembly frame; 3 421. Clamp; 3422. Bearing; 343. Telescopic member 1; 344. Slide rod 1; 345. Telescopic member 2; 346. Tension sensor; 347. Spring 1; 35. Measuring component; 351. Slide rod 2; 352. Spring 2; 353. Rotating plate; 354. Ball wheel; 355. Displacement sensor; 356. Bracket; 357. Pull rope; 358. Reel; 3581. Coil spring; 359. Motor 2. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0032] Combine Figures 1-8 , a stainless steel product inner circle polishing device, comprising:

[0033] like Figure 1As shown, the device of the present invention includes a clamping mechanism 20. A pair of parallel support wheels 22 are provided on the clamping mechanism 20 for rotationally supporting the lower side of the product. The machine 21 is provided with at least two groups along the axis of rotation of the product. A clamping wheel 23 is also provided on the upper side of the product. The clamping wheel 23 is supported by a mechanical arm on one side so that it rotates against the upper surface of the product to clamp the product, thereby making the product stable during rotation. Between the two machines 21, a motor three (not shown in the figure) is provided. The motor three is used to drive a single support wheel 22 to rotate, or to drive multiple support wheels 22 to rotate synchronously through a linkage device. Through the rotation of the support wheels 22, the product is driven to rotate around its own central axis, thereby realizing low-speed rotation of the product around its own central axis.

[0034] The slide mechanism 10 is preferably an electric slide module, which is arranged on one side of the clamping mechanism 20. The slide mechanism 10 includes a slide 11 and a slide 12 that slides in a controlled manner on the slide 11. The sliding movement of the slide 12 on the slide 11 is controlled by a control unit, and the control unit is preferably a PLC controller.

[0035] For products with composite surfaces of cylindrical and conical inner walls, as well as products with cylindrical inner surfaces of different inner diameters, the present invention provides the following device to implement efficient and high-quality polishing during polishing.

[0036] like Figures 1 to 4 As shown, the polishing mechanism 30 includes a penetrating frame 31 fixedly mounted on one side of the slide 11. Penetrating frame 31 is horizontally arranged and, driven by the slide 11, can extend horizontally into the interior of the product. A support assembly 34 is provided at the end of penetrating frame 31. A friction wheel assembly 33 is mounted below support assembly 34 for rubbing the interior surface of the product. Support assembly 34 pushes friction wheel assembly 33 to maintain contact with the interior surface of the product.

[0037] Combine Figure 2 and Figure 3 A drive shaft 32 is provided inside the frame 31 for rotation. One end of the drive shaft 32 is connected to the friction wheel assembly 33 through a telescopic coupling 321. A motor 13 is provided on the slide 12. The output end of the motor 13 is coaxially connected to the other end of the drive shaft 32. The drive shaft 32 is driven by the motor 13 to rotate at a high speed. The setting of the telescopic coupling 321 is then used to make the friction wheel assembly 33 change its position and angle. The drive shaft 32 can drive the friction wheel assembly 33 to rotate at a high speed.

[0038] Combine Figure 3 and Figure 4A measuring assembly 35 is mounted on one side of the support assembly 34 to detect the inclination of the product's inner surface along the advancing direction. The portion of the measuring assembly 35 that detects the product's inner wall is in the same direction as the portion of the friction wheel assembly 33 that rubs against the product's inner wall. Furthermore, the measuring assembly 35 is located in front of the friction wheel assembly 33 in its advancing direction. The support assembly 34 comprises a support frame 341 and an assembly frame 342 rotatably mounted below the support frame 341. A pair of clamps 3421 are fixedly mounted in the middle of the assembly frame 342. The clamps 3421 rotatably mount the friction wheel assembly 33 via bearings 3422 disposed within the clamps 3421. A telescopic member 343 for controlling the tilt angle of the assembly frame 342 is provided on one side of the support frame 341. The measuring component 35 is electrically connected to the telescopic member 343 and the above-mentioned control unit. The control unit controls the telescopic member 343 to tilt the assembly frame 342 accordingly at the corresponding position based on the inclination of the inner surface of the product measured by the measuring component 35, so as to enable the friction wheel component 33 to fit the inner surface of the product, so that the friction wheel component 33 can automatically perform efficient and high-quality grinding and polishing on the composite surface of the product during movement.

[0039] The specific working principle is as follows: first start the motor three, and the rotating support wheel 22 controls the product to rotate at a low speed, and then control the slide 12 to move toward the product until the friction wheel assembly 33 enters the inner side of the product, and then control the support assembly 34 to prompt the friction wheel assembly 33 and the measuring assembly 35 to move down until the friction wheel assembly 33 fits the inner surface of the product, and then start the motor 13 to prompt the friction wheel assembly 33 to rotate at a high speed, prompting the friction wheel assembly 33 to grind the inner surface of the contacted product, and then control the slide 12 to advance at a uniform speed, cooperate with the rotating product, and ensure that the friction wheel assembly 33 can fully grind the circumferential inner surface of the product; after the friction wheel assembly 33 is During the advancement of the slide 12, when the measuring component 35 advances to the inclined surface, it will detect the inclination of the surface and feed it back to the control unit through an electrical signal. The control unit records its inclination and position. Subsequently, when the friction wheel assembly 33 reaches this position, the telescopic member 343 is controlled to push the assembly frame 342 to rotate and tilt, so that the central axis of the friction wheel assembly 33 is tilted to the same inclination as the inclined surface, and the support component 34 will continue to push the friction wheel assembly 33 to ensure that the friction wheel assembly 33 and the inner surface of the product remain in contact. In this way, the friction wheel assembly 33 can adapt to the inner surface of the product with changing inclination, thereby improving the grinding efficiency and grinding accuracy.

[0040] Combine Figure 3 and Figure 4The support assembly 34 also includes a slide rod 344 fixedly arranged on the upper side of the support frame 341. The slide rod 344 is vertically slidably assembled at the end of the deep frame 31. The end of the deep frame 31 is also fixedly assembled with a telescopic member 345. The output end of the telescopic member 345 is used to push the slide rod 344 up and down.

[0041] A tension sensor 346 is fixedly mounted on the output end of telescopic member 2 345 . Tension sensor 346 and telescopic member 2 345 are electrically connected to a control unit. A spring 1 347 is fixedly attached to the upper side of tension sensor 346 . A connecting plate is fixedly attached to the upper end of slide bar 1 344 . The upper end of spring 1 347 is fixedly attached to the lower surface of the connecting plate. When the output end of telescopic member 2 345 pulls slide bar 1 344 downward via spring 1 347 , causing friction wheel assembly 33 to contact the inner surface of the product, tension sensor 346 detects the elastic force of spring 1 347 , thereby further controlling the pressure of friction wheel assembly 33 on the inner surface of the product to remain within an appropriate range. Both telescopic members 1 and 2 are preferably servo cylinders.

[0042] Specifically, when the friction wheel assembly 33 polishes the inclined surface of the product, its height must continuously descend or ascend. Relying solely on the extension and retraction of telescopic member 2 345 for control, the friction wheel assembly 33 can easily exert excessive or no pressure on the product's inner surface, ultimately affecting the polishing effect of the inclined surface. However, by providing a tension sensor 346 and spring 1 347, spring 1 347 elastically pulls slide 1 344, forcing the friction wheel assembly 33 to remain pressed against the inclined surface. Simultaneously, tension sensor 346 detects the elastic force of spring 1 347 when it is stretched by telescopic member 2 345, ensuring that the elastic force of spring 1 347 remains within a suitable range. Furthermore, the pressure of the friction wheel assembly 33 on the product's inner surface is also maintained within a suitable range.

[0043] Combine Figure 6-Figure 8 The cam 352 is actuated to move the cam 353 in a direction of rotation relative to the workpiece 33. The cam 353 is actuated to move the cam 353 in a direction of rotation relative to the workpiece 33. The cam 353 is actuated to move the cam 353 in a direction of rotation relative to the workpiece 33. The cam 353 is actuated to move the cam 353 in a direction of rotation relative to the workpiece 33.

[0044] Specifically, spring 2 352 pushes slide bar 2 351 downward, causing both ball wheels 354 to roll along the inner surface of the product. When the two ball wheels 354 roll along the horizontal portion of the product's inner wall, rotating plate 353 remains horizontal. When the two ball wheels 354 move from the horizontal portion to the inclined portion, they adaptively tilt, causing rotating plate 353 to rotate to the same inclination as the inclined surface. This allows for accurate detection of the inclined surface's inclination, providing a basis for subsequent adjustment of the assembly jig 342's inclination.

[0045] After the tilt angle of assembly frame 342 is adjusted to a preset value, the angle between rotating plate 353 and second slide bar 351 will reset to its initial value. Simultaneously, the output of displacement sensor 355 will also reset to its initial length. By observing the reset state of displacement sensor 355, it is possible to determine whether assembly frame 342 has tilted to the preset angle. If there is an error, adjustments can be made based on the deviation between the angle between rotating plate 353 and second slide bar 351 and the initial value.

[0046] To ensure that the two ball rollers 354 can roll closely against the inner surface of the product, a torsion spring can be installed on the shaft connecting the rotating plate 353 to the second slide rod 351. This torsion spring forces the end of the rotating plate 353, which is farther from the shaft, to rotate downward, allowing the ball rollers 354 at the distal end to closely contact the inner surface of the product. It should be noted that the rotation range of the rotating plate 353 is limited by a limiting structure (e.g., a limiting groove and a limiting block) to prevent the rotating plate 353 from rotating excessively, which would prevent the two ball rollers 354 from smoothly contacting the inner surface of the product.

[0047] Recombination Figures 6 to 8 A bracket 356 is fixedly mounted on the upper surface of the assembly block, located on one side of the second slide bar 351. A guide wheel is mounted on the upper end of bracket 356, and a second motor 359 is mounted on the lower end. The output end of motor 359 is connected to a reel 358. A pull cord 357 is connected to the upper end of the second slide bar 351. The pull cord 357 passes over the guide wheel and is wound around the inside of the reel 358. A coil spring 3581 is also mounted on one side of the reel 358. Under normal conditions, coil spring 3581 drives the reel 358 to rotate elastically, keeping the pull cord 357 taut.

[0048] The elastic force of spring 2 352 is greater than the elastic force of coil spring 3581, enabling spring 2 352 to overcome the elastic force of coil spring 3581 and push slide bar 2 351 downward. Coil spring 3581 elastically drives take-up reel 358, which tensions pull cord 357. This keeps pull cord 357 taut as slide bar 2 351 moves upward and downward, preventing it from loosening. When motor 2 359 is not in operation, its output shaft is in a freely rotating state.

[0049] Before and after the friction wheel assembly 33 polishes the product, the second motor 359 is in operation. The second motor 359 drives the reel 358 to rotate, causing the reel 358 to reel in the pull rope 357, which pulls the second slide bar 351 upward, thereby controlling the lower end of the second slide bar 351 to retract to a certain height. This prevents the measuring assembly 35 from colliding with the edge of the product during the initial entry and exit process.

[0050] Combine Figure 5 The friction wheel assembly 33 includes a supporting layer 332, a rotating seat 333 is fixedly sleeved on the outer surface of the supporting layer 332, and a friction belt 331 is fixedly sleeved on the outer surface of the rotating seat 333. The rotating seat 333 is made of a flexible material, such as sponge, elastic rubber, etc., to provide elastic support for the friction belt 331. The two ends of the central axis of the supporting layer 332 are sleeved on the inner side of a pair of bearings 3422, and one end of the telescopic coupling 321 is fixedly connected to one end of the central axis of the supporting layer 332.

[0051] Specifically, when the support assembly 34 pushes the friction wheel assembly 33 into contact with the inner surface of the product, the rotating seat 333 can partially deform, thereby increasing the contact area between the friction belt 331 and the inner surface of the product, thereby improving polishing efficiency. Furthermore, this deformability of the rotating seat 333 allows it to adapt to the junction between the cylindrical and conical surfaces of the inner wall of the product, greatly improving the polishing effect of this area.

[0052] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A stainless steel product inner circle polishing device, characterized in that: include: A clamping mechanism (20) is used to assemble the product and drive the product to rotate around its own central axis; A slide mechanism (10) is provided on one side of the clamping mechanism (20), and comprises a slide seat (11) and a slide table (12) which slides on the slide seat (11) in a controlled manner; The polishing mechanism (30) comprises a deep-entry frame (31) mounted on one side of the slide (11), a support assembly (34) being provided at the end of the deep-entry frame (31), a friction wheel assembly (33) for rubbing the inner surface of the product being mounted on the lower side of the support assembly (34), the support assembly (34) pushing the friction wheel assembly (33) to fit the inner surface of the product, a measuring assembly (35) for detecting the inclination of the inner surface of the product along the forward direction being provided on one side of the support assembly (34), and the support assembly (34) comprising a support frame (341) and an assembly frame (342) rotatably assembled on the lower side of the support frame (341), the friction wheel assembly (33) is rotatably assembled on the assembly frame (342), and a telescopic member (343) for controlling the tilt angle of the assembly frame (342) is provided on one side of the support frame (341), and the telescopic member (343) controls the assembly frame (342) to tilt accordingly at a corresponding position based on the inclination of the inner surface of the product measured by the measuring component (35), so as to enable the friction wheel assembly (33) to fit the inner surface of the product; A drive shaft (32) is rotatably provided inside the penetration frame (31), one end of the drive shaft (32) is connected to the friction wheel assembly (33) via a telescopic coupling (321), a motor 1 (13) is provided on the slide (12), and the output end of the motor 1 (13) is coaxially connected to the other end of the drive shaft (32); The assembly frame (342) is provided with an assembly block on one side close to the product, and the measuring component (35) includes a second slide bar (351) vertically slidably provided on the assembly block, and a second spring (352) is provided on the surface of the second slide bar (351) for pushing the second slide bar (351) to slide downward, and a rotating plate (353) is rotatably provided at the lower end of the second slide bar (351), and a pair of ball wheels (354) are mounted on the lower side of the rotating plate (353). A displacement sensor (355) is also rotatably mounted on the lower side of the second slide bar (351), and an output end of the displacement sensor (355) is rotatably connected to an end of the rotating plate (353) away from the second slide bar (351).

2. The internal polishing device for stainless steel products according to claim 1, characterized in that: The support assembly (34) further includes a slide bar 1 (344) fixedly arranged on the upper side of the support frame (341), and the slide bar 1 (344) is vertically slidably assembled at the end of the deep-reaching frame (31). The end of the deep-reaching frame (31) is also fixedly assembled with a telescopic member 2 (345), and the output end of the telescopic member 2 (345) is used to push the slide bar 1 (344) to move up and down.

3. The internal polishing device for stainless steel products according to claim 2, characterized in that: The output end of the telescopic member 2 (345) is fixedly equipped with a tension sensor (346), the upper side of the tension sensor (346) is fixedly connected to a spring 1 (347), the upper end of the slide rod 1 (344) is fixedly connected to a connecting plate, and the upper end of the spring 1 (347) is fixedly connected to the lower surface of the connecting plate.

4. The internal polishing device for stainless steel products according to claim 2, characterized in that: A pair of clamps (3421) are fixedly provided in the middle of the assembly frame (342), and the clamps (3421) rotate and assemble the friction wheel assembly (33) via bearings (3422) provided on the inner sides.

5. The internal polishing device for stainless steel products according to claim 1, characterized in that: A bracket (356) is fixedly provided on the upper surface of the assembly block, and the bracket (356) is located on one side of the second slide bar (351). A guide wheel is provided at the upper end of the bracket (356), and a second motor (359) is provided at the lower end of the bracket (356). The output end of the second motor (359) is connected to a winding disk (358), and the upper end of the second slide bar (351) is connected to a pull rope (357), and the pull rope (357) is wound around the guide wheel and wound on the inner side of the winding disk (358).

6. The internal polishing device for stainless steel products according to claim 5, characterized in that: A coil spring (3581) is further provided on one side of the reel (358). Under normal conditions, the coil spring (3581) drives the reel (358) to have an elastic rotation tendency, so that the pull rope (357) remains in a tensioned state.

7. The internal polishing device for stainless steel products according to claim 4, characterized in that: The friction wheel assembly (33) comprises a support layer (332), a rotating seat (333) is fixedly sleeved on the outer surface of the support layer (332), a friction belt (331) is fixedly sleeved on the outer surface of the rotating seat (333), two ends of the central axis of the support layer (332) are sleeved on the inner sides of a pair of bearings (3422), and one end of the telescopic coupling (321) is fixedly connected to one end of the central axis of the support layer (332).

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