Stainless steel product inner circle polishing device

Abstract

The invention relates to the technical field of inner circle polishing, discloses a stainless steel product inner circle polishing device, and solves the problems that when an existing stainless steel product inner circle polishing device faces products with complex inner wall shapes, the polishing effect is poor, and polishing operation is inconvenient to complete at a time. The friction wheel assembly is pushed to be attached to the inner surface of the product through the supporting assembly, a measuring assembly for detecting the inclination degree of the inner surface of the product in the advancing direction is arranged on one side of the supporting assembly (34), and after the inclination degree of the inner surface of the product is measured through the measuring assembly, the first telescopic component is controlled to make the assembling frame correspondingly incline at the corresponding position. The friction wheel assembly is promoted to be attached to the inner surface of the product in a matched mode, so that the friction wheel assembly automatically conducts efficient and high-quality grinding and polishing on the composite surface of the product in the moving process.

Description

Technical Field

[0001] The present invention relates to the technical field of internal circle polishing, and particularly to an internal circle polishing device for stainless steel products. Background Art

[0002] The internal circle polishing device for stainless steel products is a device specifically used for polishing the inner surface of stainless steel products. However, in practical applications, for stainless steel products (hereinafter referred to as products) with a relatively large inner circle diameter and a complex inner wall shape, the existing polishing devices have certain limitations.

[0003] Taking a common internal circle polishing device as an example, it usually includes a clamping device, a sliding table mechanism, and a friction mechanism. The clamping device is used to fix the product and drive it to rotate slowly; the sliding table mechanism is used to support and move the friction mechanism so that it can extend into the inside of the product; the friction mechanism includes a rotating shaft that actively extends into the inside of the product, and a friction wheel is arranged at the end of the rotating shaft. By making the friction wheel fit the inner wall of the product and rotate at a high speed, and cooperating with the slowly rotating product, the polishing of the inner wall of the product is achieved. This device can relatively effectively complete the polishing task when processing products with a single cylindrical inner surface.

[0004] However, when facing products with a composite inner surface, such as reducing ducts, cookware, etc., whose inner walls are composed of a cylindrical surface and a conical surface, and the inner diameters of different regions are also different, the existing internal circle polishing devices are inadequate. For the conical inner surface, 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 the cylindrical inner surface with different inner diameters, the existing devices cannot achieve one-time polishing, and it is necessary to adjust the position and size of the friction wheel multiple times, which not only increases the complexity of the operation but also reduces the production efficiency, and it is 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 an internal circle polishing device for stainless steel products, which solves the problems of poor polishing effect and inconvenient one-time polishing operation of the existing internal circle polishing device for stainless steel products when facing products with a complex inner wall shape.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An internal circle polishing device for stainless steel products, comprising: A clamping mechanism for assembling the product and driving the product to rotate around its own central axis; A sliding table mechanism arranged on one side of the clamping mechanism, including a sliding seat and a sliding table that slides under control on the sliding seat; The polishing mechanism includes a deepening frame assembled on one side of the sliding seat. A support assembly is provided at the end of the deepening frame. A friction wheel assembly for frictionally contacting the inner surface of the product is assembled below the support assembly. The support assembly pushes the friction wheel assembly to fit against the inner surface of the product. A measuring assembly for detecting the inclination of the inner surface of the product in the advancing direction is provided on one side of the support assembly. The support assembly includes a support frame and an assembly frame rotatably assembled below the support frame. The friction wheel assembly is rotatably assembled on the assembly frame. A first telescopic member for controlling the inclination angle of the assembly frame is provided on one side of the support frame. The first telescopic member controls the assembly frame to incline correspondingly at the corresponding position based on the inclination of the inner surface of the product measured by the measuring assembly, so as to make the friction wheel assembly fit the inner surface of the product.

[0007] As a further description of the above technical solution: A drive shaft is rotatably provided inside the deepening frame. One end of the drive shaft is connected to the friction wheel assembly through a telescopic coupling. A first motor is provided on the sliding table, and the output end of the first motor is coaxially connected to the other end of the drive shaft.

[0008] As a further description of the above technical solution: The support assembly further includes a first sliding rod fixedly provided on the upper side of the support frame. The first sliding rod is vertically slidably assembled at the end of the deepening frame. A second telescopic member is also fixedly assembled at the end of the deepening frame, and the output end of the second telescopic member is used to push the first sliding rod to move up and down.

[0009] As a further description of the above technical solution: A tension sensor is fixedly assembled at the output end of the second telescopic member. A first spring is fixedly connected above the tension sensor. The upper end of the first sliding rod is fixedly connected to an adapter plate, and the upper end of the first spring is fixedly connected to the lower surface of the adapter plate.

[0010] As a further description of the above technical solution: A pair of clamps are fixedly provided in the middle of the assembly frame. The friction wheel assembly is rotatably assembled through bearings provided inside the clamps.

[0011] As a further description of the above technical solution: An assembly block is provided on the side of the assembly frame close to the product. The measuring assembly includes a second sliding rod vertically slidably provided on the assembly block. A second spring for pushing the second sliding rod to slide downward is sleeved on the surface of the second sliding rod. A rotating plate is rotatably provided at the lower end of the second sliding rod. A pair of ball wheels are assembled below the rotating plate. A displacement sensor is also rotatably assembled below the second sliding rod, and the output end of the displacement sensor is rotatably connected to one end of the rotating plate away from the second sliding rod.

[0012] As a further description of the above technical solution: A bracket is fixedly arranged on the upper surface of the assembly block. The bracket is located on one side of the second sliding rod. A guide wheel is arranged at the upper end of the bracket, and a second motor is arranged at the lower end of the bracket. The output end of the second motor is connected with a winding disc. The upper end of the second sliding rod is connected with a pulling rope, and the pulling rope is wound around the guide wheel and then wound inside the winding disc.

[0013] As a further description of the above technical solution: A torsion spring is further arranged on one side of the winding disc. In the normal state, the torsion spring drives the winding disc to have an elastic rotation tendency, so that the pulling rope is kept in a tension state.

[0014] As a further description of the above technical solution: The friction wheel assembly includes a support layer. A rotating seat is fixedly sleeved on the outer surface of the support layer, and a friction belt is fixedly sleeved on the outer surface of the rotating seat. Both ends of the central axis of the support layer are sleeved inside a pair of bearings, and one end of the telescopic coupling is fixedly connected with one end of the central axis of the support layer.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: 1. Through the control of the control unit, after the inclination of the inner surface of the product is measured by the measuring component, the first telescopic member is further controlled to make the assembly frame incline correspondingly at the corresponding position, so as to make the friction wheel assembly fit the inner surface of the product, so that during the movement of the friction wheel assembly, the composite surface of the product can be polished efficiently and with high quality automatically.

[0016] 2. Through the setting of the tension sensor and the first spring, the first spring can elastically pull the first sliding rod, so as to make the friction wheel assembly keep pressing on the inclined plane. At the same time, the tension sensor detects the elastic force when the first spring is stretched by the second telescopic member, so that the elastic force of the first spring is kept within a suitable range. Further, the pressure of the friction wheel assembly on the inner surface of the product will also be kept within a suitable range, which improves the overall quality of the polishing. Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the planar structural schematic diagram of the polishing mechanism of the present invention; Figure 3 is the structural schematic diagram of the polishing mechanism of the present invention; Figure 4 is the structural schematic diagram of the support assembly of the present invention; Figure 5 is the structural schematic diagram of the friction wheel assembly of the present invention; Figure 6 is the structural schematic diagram of the support assembly and the measuring assembly of the present invention; Figure 7 of the present invention Figure 6Enlarged schematic diagram of A in the [device]; Figure 8 For the present invention Figure 6 Enlarged schematic diagram of B in the [device].

[0018] In the figure: 10, sliding table mechanism; 11, sliding seat; 12, sliding table; 13, motor one; 20, clamping mechanism; 21, machine table; 22, supporting wheel; 23, clamping wheel; 30, polishing mechanism; 31, deepening frame; 32, driving shaft; 321, telescopic coupling; 33, friction wheel assembly; 331, friction belt; 332, supporting layer; 333, rotating seat; 34, supporting assembly; 341, supporting frame; 342, assembling frame; 3421, clamp; 3422, bearing; 343, telescopic member one; 344, sliding rod one; 345, telescopic member two; 346, tension sensor; 347, spring one; 35, measuring assembly; 351, sliding rod two; 352, spring two; 353, rotating plate; 354, ball wheel; 355, displacement sensor; 356, bracket; 357, pulling rope; 358, winding disc; 3581, coil spring; 359, motor two. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] To further understand the content of the present invention, the present invention will be described in detail in conjunction with the accompanying drawings.

[0021] Combined with Figures 1-8 , an inner circle polishing device for stainless steel products includes: As Figure 1 shown, the device of the present invention includes a clamping mechanism 20. A pair of parallel supporting wheels 22 are arranged on the clamping mechanism 20 for rotatably supporting the lower side of the product. The machine table 21 is provided with at least two groups along the axial direction of the rotation of the product. A clamping wheel 23 is further arranged on the upper side of the product. The clamping wheel 23 is supported by a mechanical arm on one side so that it rotates and abuts against the upper surface of the product to clamp the product, so that the product can be stable when rotating. Between the two machine tables 21, a motor three (not shown in the figure) is arranged. The motor three is used to drive a single supporting wheel 22 to rotate, or drive a plurality of supporting wheels 22 to rotate synchronously through a linkage device. Through the rotation of the supporting wheels 22, the product is driven to rotate around its own central axis, so as to realize the low-speed rotation of the product around its own central axis.

[0022] The sliding table mechanism 10, preferably an electric sliding table module, is arranged on one side of the clamping mechanism 20. The sliding table mechanism 10 includes a sliding seat 11 and a sliding table 12 that slides controllably on the sliding seat 11. The sliding action of the sliding table 12 on the sliding seat 11 is controlled by a control unit, and the control unit is preferably a PLC controller.

[0023] For products with a composite surface whose inner wall is columnar and conical, and a cylindrical inner surface with different inner diameters, when polishing, the present invention provides the following device to implement efficient and high-quality grinding.

[0024] As Figures 1 to 4 shown, the polishing mechanism 30 includes a deepening frame 31 fixedly assembled on one side of the sliding seat 11. The deepening frame 31 is horizontally arranged and can horizontally penetrate into the inside of the product driven by the sliding seat 11. A support assembly 34 is arranged at the end of the deepening frame 31, and a friction wheel assembly 33 for frictional contact with the inner surface of the product is assembled under the support assembly 34. The support assembly 34 pushes the friction wheel assembly 33 to keep it in contact with the inner surface of the product.

[0025] Combined Figure 2 and Figure 3 , a drive shaft 32 is rotatably arranged inside the deepening frame 31. One end of the drive shaft 32 is connected to the friction wheel assembly 33 through a telescopic coupling 321. A first motor 13 is arranged on the sliding table 12, and the output end of the first motor 13 is coaxially connected to the other end of the drive shaft 32. The drive shaft 32 is driven by the first motor 13 to rotate at a high speed. With the setting of the telescopic coupling 321, when the friction wheel assembly 33 changes its position and angle, the drive shaft 32 can drive the friction wheel assembly 33 to rotate at a high speed.

[0026] Combined Figure 3 and Figure 4, a measuring component 35 for detecting the inclination of the inner surface of the product along the advancing direction is arranged on one side of the supporting component 34. The detection part of the inner wall of the product by the measuring component 35 and the friction part of the inner wall of the product by the friction wheel component 33 are in the same direction, and in the advancing direction of the friction wheel component 33, the measuring component 35 is located in front of the friction wheel component 33. The supporting component 34 includes a support frame 341 and an assembly frame 342 rotatably assembled under the support frame 341. A pair of clamps 3421 are fixedly arranged in the middle of the assembly frame 342, and the friction wheel component 33 is rotatably assembled by the bearings 3422 arranged on the inner side of the clamps 3421. A first telescopic member 343 for controlling the inclination angle of the assembly frame 342 is arranged on one side of the support frame 341. The measuring component 35 is electrically connected to the first telescopic member 343 and the above control unit. Through the control of the control unit, after the inclination of the inner surface of the product measured by the measuring component 35, the first telescopic member 343 is controlled to make the assembly frame 342 tilt correspondingly at the corresponding position, so as to make the friction wheel component 33 fit the inner surface of the product, so that during the movement of the friction wheel component 33, the composite surface of the product can be polished efficiently and with high quality automatically.

[0027] The specific working principle is as follows: First, start the third motor, and control the product to rotate slowly by the rotating support wheel 22. Then, control the slide table 12 to move towards the product until the friction wheel component 33 enters the inner side of the product. Then, control the supporting component 34 to make the friction wheel component 33 and the measuring component 35 move down until the friction wheel component 33 fits the inner surface of the product. Then, start the first motor 13 to make the friction wheel component 33 rotate at a high speed, so that the friction wheel component 33 polishes the inner surface of the product in contact, and then control the slide table 12 to advance at a constant speed, cooperating with the rotating product to ensure that the friction wheel component 33 can fully polish the circumferential inner surface of the product; during the process that the friction wheel component 33 is pushed by the slide table 12, when the measuring component 35 advances to the inclined surface, it will detect the inclination of the surface and feedback it to the control unit through an electrical signal. The control unit records its inclination and the position where it is located. Then, when the friction wheel component 33 reaches this position, control the first telescopic member 343 to push the assembly frame 342 to rotate and tilt, so that the central rotating shaft of the friction wheel component 33 tilts at the same inclination as the inclined surface, and the supporting component 34 will keep pushing the friction wheel component 33 to ensure that the friction wheel component 33 keeps fitting the inner surface of the product. In this way, the friction wheel component 33 can adapt to and fit the inner surface of the product with changing inclination, thereby improving the polishing efficiency and polishing accuracy.

[0028] Combined with Figure 3 and Figure 4, the support assembly 34 further includes a first slide bar 344 fixedly arranged on the upper side of the support frame 341. The first slide bar 344 is vertically and slidably assembled at the end of the insertion frame 31. A second telescopic member 345 is also fixedly assembled at the end of the insertion frame 31. The output end of the second telescopic member 345 is used to push the first slide bar 344 to move up and down.

[0029] A tension sensor 346 is fixedly assembled at the output end of the second telescopic member 345. The tension sensor 346 and the second telescopic member 345 are electrically connected to the control unit. A first spring 347 is fixedly connected to the upper side of the tension sensor 346. The upper end of the first slide bar 344 is fixedly connected with an adapter plate. The upper end of the first spring 347 is fixedly connected to the lower surface of the adapter plate. When the output end of the second telescopic member 345 pulls the first slide bar 344 downward through the first spring 347, causing the friction wheel assembly 33 to fit against the inner surface of the product, the tension sensor 346 can detect the elastic force of the first spring 347, thereby further controlling the pressure of the friction wheel assembly 33 against the inner surface of the product to be maintained within a suitable range. The first and second telescopic members are preferably both selected as servo electric cylinders.

[0030] Specifically, when the friction wheel assembly 33 polishes the inclined surface portion of the product, its position height needs to continuously decrease or increase. If only controlled by the telescopic movement of the second telescopic member 345, it is easy to cause the pressure of the friction wheel assembly 33 against the inner surface of the product to be too large or have no pressure, ultimately affecting the polishing effect of the inclined surface. Through the settings of the tension sensor 346 and the first spring 347, the first spring 347 can elastically pull the first slide bar 344, causing the friction wheel assembly 33 to remain pressed against the inclined surface. At the same time, the tension sensor 346 detects the elastic force of the first spring 347 when it is stretched by the second telescopic member 345, so that the elastic force of the first spring 347 is maintained within a suitable range. Further, the pressure of the friction wheel assembly 33 against the inner surface of the product will also be maintained within a suitable range.

[0031] Combined Figures 6-8 , an assembly block is arranged on the side of the assembly frame 342 close to the product. The measuring assembly 35 includes a second slide bar 351 vertically slidably arranged on the assembly block. A second spring 352 that pushes the second slide bar 351 downward is sleeved on the surface of the second slide bar 351. A rotating plate 353 is rotatably arranged at the lower end of the second slide bar 351. The rotation direction of the rotating plate 353 is in the same plane as the direction in which the friction wheel assembly 33 is pushed. A pair of ball wheels 354 are assembled on the lower side of the rotating plate 353. A displacement sensor 355 is also rotatably assembled at the lower side of the second slide bar 351. The output end of the displacement sensor 355 is rotatably connected to the end of the rotating plate 353 away from the second slide bar 351. The displacement sensor 355 is electrically connected to the control unit. When the rotating plate 353 rotates, the output end of the displacement sensor 355 will correspondingly extend or shorten. By conversion, such as through trigonometric functions, the inclination change angle of the rotating plate 353 can be obtained.

[0032] Specifically, the second spring 352 pushes the second slide bar 351 downward, causing both ball wheels 354 to roll on the inner surface of the product. When both ball wheels 354 roll on the horizontal part of the inner wall of the product, the rotating plate 353 remains horizontal. When both ball wheels 354 enter the inclined part from the horizontal part, both ball wheels 354 will adaptively tilt, causing the rotating plate 353 to rotate to the same inclination as the inclined surface, thereby realizing the detection of the inclination of the inclined surface and providing a basis for the subsequent adaptive adjustment of the inclination of the assembly rack 342.

[0033] After debugging the inclination angle of the assembly rack 342 to the preset value, the included angle between the rotating plate 353 and the second slide bar 351 will reset to the angle in the initial state, and at the same time, the output end of the displacement sensor 355 will also reset to the length in the initial state. By observing the reset state of the displacement sensor 355, it can be determined whether the assembly rack 342 is inclined to the preset angle. If there is an error, corresponding adjustments can be made according to the deviation amount between the included angle between the rotating plate 353 and the second slide bar 351 and the angle in the initial state.

[0034] To ensure that both ball wheels 354 can tightly roll on the inner surface of the product, a torsion spring can be provided on the rotating shaft connecting the rotating plate 353 and the second slide bar 351. Through the action of the torsion spring, the end of the rotating plate 353 far from the rotating shaft is forced to have a downward rotation trend, so that the ball wheel 354 at the distal end can tightly fit 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 (such as using a limiting groove and a limiting block) to prevent the rotating plate 353 from rotating too much, resulting in both ball wheels 354 being unable to smoothly contact the inner surface of the product.

[0035] Combined with Figures 6 to 8 On the upper surface of the assembly block, a bracket 356 is fixedly provided, 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. The output end of the second motor 359 is connected to a winding disc 358, and the upper end of the second slide bar 351 is connected to a pulling rope 357. The pulling rope 357 is wound around the guide wheel and then wound inside the winding disc 358. A coil spring 3581 is also provided on one side of the winding disc 358. The coil spring 3581 drives the winding disc 358 to have an elastic rotation trend under normal conditions, so that the pulling rope 357 is kept in a tensioned state.

[0036] The elastic force of the second spring 352 is greater than the elastic force of the coil spring 3581, so that the second spring 352 can overcome the elastic force of the coil spring 3581 and push the second slide bar 351 to move downward. The coil spring 3581 elastically drives the winding disc 358 to tension the pulling rope 357, so that when the second slide bar 351 moves up and down, the pulling rope 357 is kept in a tensioned state and avoids slack. When the second motor 359 is in a non-working state, its output shaft is in a free rotation state.

[0037] Before the friction wheel assembly 33 polishes the product and after the polishing is completed, the second motor 359 is in a working state. The second motor 359 drives the winding disc 358 to rotate, so that the winding disc 358 winds the pulling rope 357, pulling the second sliding rod 351 upward, so as to control the lower end of the second sliding rod 351 to be retracted to a certain height, thereby avoiding the measurement assembly 35 from colliding with the edge of the product during the process of initially entering and exiting the product.

[0038] Combined with Figure 5 , the friction wheel assembly 33 includes 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. The rotating seat 333 is made of a flexible material, such as sponge, elastic rubber, etc., providing elastic support for the friction belt 331. Both ends of the central axis of the support layer 332 are sleeved inside a pair of bearings 3422. One end of the telescopic coupling 321 is fixedly connected to one end of the central axis of the support layer 332.

[0039] Specifically, when the support assembly 34 pushes the friction wheel assembly 33 to fit with the inner surface of the product, the rotating seat 333 can undergo local deformation, thereby increasing the contact area between the friction belt 331 and the inner surface of the product, and then improving the polishing efficiency. At the same time, the deformation ability of the rotating seat 333 enables it to adapt to the connecting part of the columnar surface and the conical surface of the inner wall of the product, thus greatly improving the polishing effect of this part.

[0040] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An inner circle polishing device for stainless steel products, characterized in that, Comprising: A clamping mechanism (20) for assembling a product and driving the product to rotate around its own central axis; A sliding table mechanism (10) arranged on one side of the clamping mechanism (20), including a sliding seat (11) and a sliding table (12) controlled to slide on the sliding seat (11); A polishing mechanism (30), including a deepening frame (31) assembled on one side of the sliding seat (11), a support assembly (34) is arranged at the end of the deepening frame (31), a friction wheel assembly (33) for frictional contact with the inner surface of the product is assembled under the support assembly (34), the support assembly (34) pushes the friction wheel assembly (33) to fit with the inner surface of the product, a measuring assembly (35) for detecting the inclination of the inner surface of the product along the advancing direction is arranged on one side of the support assembly (34), the support assembly (34) includes a support frame (341) and an assembly frame (342) rotatably assembled under the support frame (341), the friction wheel assembly (33) is rotatably assembled on the assembly frame (342), a telescopic member one (343) for controlling the inclination angle of the assembly frame (342) is arranged on one side of the support frame (341), and the telescopic member one (343) controls the assembly frame (342) to incline correspondingly at the corresponding position based on the inclination of the inner surface of the product measured by the measuring assembly (35), so as to make the friction wheel assembly (33) fit with the inner surface of the product.

2. The inner circle polishing device for a stainless steel product according to claim 1, characterized in that: A drive shaft (32) is rotatably arranged inside the deepening frame (31), one end of the drive shaft (32) is connected to the friction wheel assembly (33) through a telescopic coupling (321), a motor one (13) is arranged on the sliding table (12), and the output end of the motor one (13) is coaxially connected to the other end of the drive shaft (32).

3. A device for inner circle polishing of a stainless steel product according to claim 1, characterized in that: The support assembly (34) further includes a first sliding rod (344) fixedly arranged on the upper side of the support frame (341), the first sliding rod (344) is vertically slidably assembled at the end of the deepening frame (31), and a telescopic member two (345) is also fixedly assembled at the end of the deepening frame (31), and the output end of the telescopic member two (345) is used to push the first sliding rod (344) to move up and down.

4. A device for inner circle polishing of a stainless steel product according to claim 3, characterized in that: A tension sensor (346) is fixedly assembled at the output end of the telescopic member two (345), a first spring (347) is fixedly connected to the upper side of the tension sensor (346), an adapter plate is fixedly connected to the upper end of the first sliding rod (344), and the upper end of the first spring (347) is fixedly connected to the lower surface of the adapter plate.

5. The inner circle polishing device for stainless steel products according to claim 3, wherein: A pair of clamps (3421) are fixedly arranged in the middle of the assembly frame (342), and the friction wheel assembly (33) is rotatably assembled through bearings (3422) arranged inside the clamps (3421).

6. The inner circle polishing device for a stainless steel product according to claim 1, characterized in that: An assembly block is provided on the side of the assembly rack (342) close to the product. The measuring assembly (35) includes a second sliding rod (351) vertically slidably provided on the assembly block. A second spring (352) for pushing the second sliding rod (351) to slide downward is sleeved on the surface of the second sliding rod (351). A rotating plate (353) is rotatably provided at the lower end of the second sliding rod (351). A pair of ball wheels (354) are assembled on the lower side of the rotating plate (353). A displacement sensor (355) is also rotatably assembled at the lower side of the second sliding rod (351). The output end of the displacement sensor (355) is rotatably connected to one end of the rotating plate (353) away from the second sliding rod (351).

7. A device for polishing the inner circle of a stainless steel product according to claim 6, characterized in that: A bracket (356) is fixedly provided on the upper surface of the assembly block. The bracket (356) is located on one side of the second sliding rod (351). A guide wheel is provided at the upper end of the bracket (356). 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 disc (358). A pull rope (357) is connected to the upper end of the second sliding rod (351). The pull rope (357) is wound around the guide wheel and then wound inside the winding disc (358).

8. A device for polishing the inner circle of a stainless steel product according to claim 7, characterized in that: A torsion spring (3581) is also provided on one side of the winding disc (358). In the normal state, the torsion spring (3581) drives the winding disc (358) to have an elastic rotation tendency, so that the pull rope (357) is kept in a tensioned state.

9. A device for polishing the inner circle of a stainless steel product according to claim 5, characterized in that: The friction wheel assembly (33) includes 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). The two ends of the central axis of the support layer (332) are sleeved inside a pair of bearings (3422). 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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