Grinding device capable of adjusting length of grinding material and adjusting method

Abstract

The invention relates to a grinding device capable of adjusting the length of a grinding material and an adjusting method. The grinding device comprises a box body, a roller, a transmission mechanism, a grinding motor, a mechanical limiting wheel, a telescopic gear sleeve, a stirring connecting rod, a slot telescopic piece, a roller fixing shaft and the grinding material. Mechanical limiting wheels are fixed to the two sides of the box, a roller is fixed to a roller fixing shaft, bearings are connected with the limiting wheels, and the roller partially extends out of the polishing opening. A roller fixing shaft is connected with a telescopic gear sleeve, the end face of the gear sleeve penetrates through a plurality of stirring grooves, a stirring connecting rod is connected with a slot telescopic piece, and grinding materials are fixed in the slot telescopic piece. The roller is provided with a separation groove, and the insertion groove telescopic piece and the polishing material are arranged in the separation groove. The transmission mechanism is connected with the telescopic gear sleeve through a gear, and the grinding motor drives the roller through a driving piece. The device introduces an intelligent adjusting function, and improves the polishing efficiency and reduces the production cost by controlling the extension and retraction of the polishing material.

Description

Technical Field

[0001] The invention relates to the technical field of grinding, and in particular to a grinding device and a method for adjusting the length of a grinding material. Background Art

[0002] With the transformation of the global energy structure and the increase in environmental pressure, wind power generation, as a clean and renewable energy source, has become an important development direction of the new energy industry. Wind power generation uses wind energy to convert it into electrical energy through wind power generation equipment, which is an energy form that conforms to the concept of sustainable development. One of the core components of wind power generation equipment is the wind turbine generator set, in which the quality and performance of wind turbine blades have a decisive influence on the power generation effect.

[0003] As a key component of wind turbine generators, the quality of wind turbine blades directly determines the efficiency and stability of wind power generation systems. Therefore, ensuring the surface quality of wind turbine blades, especially surface smoothness and defect-freeness, has become an important link in wind turbine blade manufacturing. In order to ensure the efficient operation of wind turbine blades, the surface treatment of wind turbine blades, including grinding, cleaning and other processes, has become a production link that cannot be ignored.

[0004] At present, the grinding of wind turbine blades is mainly carried out by mobile grinding devices. These devices usually use sandpaper to contact the blade surface for grinding, but there are certain problems with existing grinding equipment. For example, in existing grinding devices, the grinding material (such as sandpaper) is usually fixed on the surface of the drum, and the material utilization rate during the grinding process is low. The sandpaper is prone to excessive wear during the grinding process, resulting in a gradual decrease in its grinding effect, while increasing the frequency of replacement of the grinding material and increasing production costs.

[0005] Among the existing patent technologies, patent number CN202210018772.2 "A large wind turbine blade surface treatment device" proposes a technology for grinding wind turbine blades by driving grinding materials through the structure of a drum. This patent uses an annular sanding belt to be cross-distributed and installed on the outer wall and inner wall of the drum, and the tension of the annular sanding belt is maintained by a first tensioning assembly and a second tensioning assembly to improve the utilization rate of the sanding belt. However, this technology still has some disadvantages, such as the annular sanding belt is susceptible to local wear, and when the annular sanding belt is broken, the grinding effect of the entire device will be affected. In addition, the replacement of the annular sanding belt requires disassembling the drum or opening the box, which is complicated and time-consuming. Summary of the invention

[0006] The invention provides a grinding device and a method for adjusting the length of a grinding material, which aims to solve the problems of low grinding material utilization and complicated material replacement in a traditional grinding device.

[0007] To achieve the above-mentioned object, the first aspect of the present invention provides a grinding device for adjusting the length of a grinding material, the grinding device comprising a box, a drum, a transmission mechanism, a grinding motor, a mechanical limit wheel, a telescopic gear sleeve, a toggle connecting rod, a slot telescopic member, a drum fixed shaft, and a grinding material;

[0008] The mechanical limit wheels are fixed on both sides of the box body, the roller fixed shaft is transversely installed in the box body, and its two ends are arranged with the mechanical limit wheel bearings, the roller is fixed on the outer wall of the roller fixed shaft, and the box body is provided with a grinding opening, and part of the grinding contact surface of the roller extends out of the grinding opening;

[0009] The roller fixed shaft is connected with the telescopic gear sleeve bearing, the telescopic gear sleeve is located on one side of the roller, the end face of the telescopic gear sleeve is penetrated with a plurality of toggle grooves along the axial direction, the toggle connecting rods are inserted into the plurality of toggle grooves, the other end of the toggle connecting rod is fixed to one end of the slot telescopic member, the other end of the slot telescopic member is provided with a slot, the grinding material is fixed in the slot, the roller is provided with a plurality of separation grooves, the plurality of separation grooves radiate outward from the center of the roller end face, and extend along the length direction of the roller until close to the other end face of the roller, each of the slot telescopic member and each of the grinding materials are arranged in the separation grooves;

[0010] The transmission mechanism is installed on the side wall of the drum, and its output end is connected to the gear of the telescopic gear sleeve;

[0011] The grinding motor is mounted on the outer surface of the box body, and the output end of the grinding motor is connected to the roller fixed shaft through a driving member.

[0012] Furthermore, the toggle grooves are evenly distributed on the end surface of the telescopic gear sleeve, and the grooves are curved.

[0013] Furthermore, the polishing device also includes a dust suction box, which is installed on the box body. The dust suction box is provided with a dust suction port, one end of which is connected to the interior of the box body, and the other end is connected to the dust collector through a dust suction pipe.

[0014] Furthermore, the grinding device also includes two groups of roughness sensors and two groups of position sensors, wherein the two groups of roughness sensors are respectively arranged on the box on both sides of the grinding port, and the two groups of position sensors are respectively arranged on the box on both sides of the grinding port.

[0015] Furthermore, the mechanical limiting wheel is a disc structure, and a layer of polyurethane material is provided on its outer wall.

[0016] Furthermore, the slot is located at the top of the slot telescopic member, the interior of which is a rectangular cavity, and the middle portion of which extends outward to form a notch.

[0017] To achieve the above object, the second aspect of the present invention provides a method for adjusting the length of a grinding material, the adjustment method is implemented by the grinding device, and the adjustment method comprises the following steps:

[0018] Step S100, collecting real-time detection values ​​of the roughness sensor;

[0019] Step S200, obtaining a position signal of a position sensor;

[0020] Step S300, comparing the real-time detection value with the preset roughness parameter;

[0021] Step S400, determining whether the position signal does not meet a preset trigger condition;

[0022] Step S500, generating a rotation instruction according to the comparison result of step S300 and the determination result of step S400;

[0023] Step S600, transmitting the rotation instruction to the transmission mechanism and starting the rotation thereof, and driving the slot telescopic member to extend or contract through the transmission mechanism to adjust the exposed length of the grinding material in the slot;

[0024] Step S700, output the exposed length information of the polishing material to the control program and end the current adjustment process.

[0025] Furthermore, the comparison in step S300 is performed in the following manner:

[0026] Step S301, obtaining a preset roughness parameter value range;

[0027] Step S302: judging whether the real-time detection value exceeds a preset roughness value range according to the real-time detection value of the roughness sensor;

[0028] Step S303: if it exceeds the range, an adjustment signal is generated to indicate that the length of the grinding material needs to be adjusted;

[0029] Step S304: If the real-time detection value is within the preset range, the current length is maintained without adjustment.

[0030] Further, the determination in step S400 is performed in the following manner:

[0031] Step S401, obtaining a current position signal fed back by a position sensor;

[0032] Step S402, comparing the current position signal with a preset position signal standard;

[0033] Step S403: If the position signal of the position sensor does not reach the set standard, it is considered that the trigger condition is not met;

[0034] Step S404: If the standard is met, it is considered that the trigger condition is met and no further position adjustment is required.

[0035] Furthermore, the generation of the rotation instruction in step S500 is achieved by:

[0036] Step S501, generating a correction signal according to the roughness data deviation determined in step S300, wherein the correction signal is used to adjust the length of the grinding material;

[0037] Step S502, generating a position adjustment signal according to the position signal deviation determined in step S400;

[0038] Step S503, combining the correction signal and the position adjustment signal as a control instruction for the transmission mechanism;

[0039] Step S504: Execute the control instruction and adjust the rotation angle of the telescopic gear sleeve through the driving of the transmission mechanism.

[0040] Beneficial effects of the present invention:

[0041] Compared with the prior art, the present invention provides a grinding device and adjustment method for adjusting the length of grinding materials, which significantly improves the utilization rate of grinding materials by introducing a design for intelligently adjusting the length of grinding materials. Traditional grinding devices usually use fixed grinding materials. With the wear during use, the effective contact area of ​​the material gradually decreases, resulting in uneven grinding effect and serious waste. The grinding device of the present invention controls the expansion and contraction of the internal components of the drum through a transmission mechanism, so that the grinding material can automatically adjust its length according to the actual wear conditions, thereby ensuring that the grinding material always maintains the best contact with the surface of the wind turbine blade. In addition, the independent installation method of the grinding material ensures that local wear will not affect the overall grinding effect, and material replacement is also simpler, which greatly reduces production costs and improves grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments.

[0043] Figure 1 It is a schematic diagram of the three-dimensional structure of a grinding device for adjusting the length of a grinding material disclosed in an embodiment of the present invention.

[0044] Figure 2 It is a front view of a grinding device for adjusting the length of a grinding material disclosed in an embodiment of the present invention.

[0045] Figure 3 It is a side view of a telescopic gear sleeve connected to a gear disclosed in an embodiment of the present invention.

[0046] Figure 4 It is a component connection structure diagram of an intelligent adjustment consumable disclosed in an embodiment of the present invention.

[0047] Figure 5 It is a structural diagram of a drum fixed shaft connected to a telescopic gear sleeve disclosed in an embodiment of the present invention.

[0048] Figure 6 It is a structural diagram of a telescopic gear sleeve connected to a toggle connecting rod disclosed in an embodiment of the present invention.

[0049] Figure 7 It is a cross-sectional view of a slot telescopic member disclosed in an embodiment of the present invention.

[0050] Figure 8 It is a control flow chart disclosed in an embodiment of the present invention.

[0051] Fig. 9 It is a control logic diagram disclosed in an embodiment of the present invention.

[0052] Figure numerals: 1. box body; 2. dust collection box; 3. mechanical limit wheel; 4. grinding material; 5. roughness sensor; 6. position sensor; 7. grinding motor; 8. roller fixing shaft; 9. roller; 10. slot telescopic part; 11. gear; 12. telescopic gear sleeve; 13. toggle connecting rod; 101. slot; 901. partition slot; 1201. toggle slot. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. 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 creative work should fall within the scope of protection of the present invention.

[0054] The present invention provides a grinding device with adjustable grinding material length, and its purpose is to transform the current grinding device in which the grinding material and the roller surface are relatively fixed and cannot be moved and adjusted, into a grinding device that can intelligently adjust consumables, thereby improving the utilization rate of the grinding material and reducing production costs.

[0055] like Figure 1-Figure 6As shown, the entire grinding device mainly includes: a box body 1, a roller 9, a transmission mechanism (not shown), a grinding motor 7, a mechanical limit wheel 3, a telescopic gear sleeve 12, a toggle connecting rod 13, a slot telescopic part 10, a roller fixed shaft 8, a grinding material 4 and other components.

[0056] Mechanical limiting wheels 3 are fixed on both sides of the box body 1, and the roller fixing shaft 8 is horizontally installed in the box body 1 and connected to the bearing of the mechanical limiting wheel 3, so that the roller 9 is firmly sleeved and fixed on the outer wall of the roller fixing shaft 8 to realize the operation of the roller 9. A grinding port is provided on the box body 1, and part of the grinding contact surface of the roller 9 extends out of the grinding port, which is convenient for contacting with the wind turbine blade for grinding.

[0057] like Figure 5 , Figure 6 As shown, the drum fixed shaft 8 is connected to the bearing of the telescopic gear sleeve 12, and the telescopic gear sleeve 12 is located on one side of the drum 9. The end face of the telescopic gear sleeve 12 is penetrated by a plurality of toggle grooves 1201 along the axial direction, and a toggle connecting rod 13 is inserted into the plurality of toggle grooves 1201. The other end of the toggle connecting rod 13 is fixed to one end of the slot telescopic member 10, and the other end of the slot telescopic member 10 includes a slot 101 for fixing the grinding material 4. The drum 9 is provided with a plurality of separation grooves 901, which radiate outward from the center of the end face of the drum 9 and extend along the length direction of the drum 9 until it is close to the other end face of the drum 9. The separation grooves 901 are used to accommodate each slot telescopic member 10 and the grinding material 4.

[0058] In this embodiment, the mechanical limit wheel 3 is fixed to both sides of the box body 1 by quick-release bolts. When replacing the grinding material 4, the mechanical limit wheel 3 on one side can be removed, and the grinding material 4 can be inserted into the slot 101 along the dividing groove 901 on the end face of the roller 9, thereby avoiding the disassembly of the roller 9 and improving the replacement efficiency.

[0059] like Figure 3 As shown, the transmission mechanism is installed on the side wall of the drum 9, and is connected to the telescopic gear sleeve 12 through the gear 11 to drive the telescopic action of the slot telescopic member 10. Specifically, when the telescopic gear sleeve 12 rotates, since the other end of the toggle connecting rod 13 is fixed on the slot telescopic member 10, the rotation of the telescopic gear sleeve 12 will be transmitted to the slot telescopic member 10 through the toggle connecting rod 13. Since the two sides of the slot telescopic member 10 are restricted, the slot telescopic member 10 cannot rotate freely in the space of the partition groove 901. The movement of the slot telescopic member 10 will be constrained and can only move along a specific trajectory or direction, that is, the slot telescopic member 10 will slide along the path of the partition groove 901 to control the exposed length of the grinding material 4, thereby adjusting the grinding effect.

[0060] The grinding motor 7 is located on the outer surface of the box 1, and is connected to the roller fixed shaft 8 through a driving member, driving the roller 9 (including the transmission mechanism) to rotate, thereby ensuring that the entire grinding process is smooth and efficient. By accurately controlling the rotation of the telescopic gear sleeve 12, the grinding material 4 can be adjusted according to actual needs, thereby optimizing the utilization rate of the material and improving the grinding effect, effectively solving the problems of material waste and cumbersome operation in traditional equipment.

[0061] like Figure 6 The toggle grooves 1201 are evenly distributed on the end surface of the telescopic gear sleeve 12, and the grooves are designed to be curved, and the rotational motion is converted into the linear movement of the slot telescopic member 10 through the curved grooves, so as to accurately control the exposed length of the grinding material 4. The shape of the curved grooves can effectively guide the toggle connecting rod 13 to move along a predetermined trajectory, ensuring that the telescopic motion of each slot telescopic member 10 is smooth and synchronous.

[0062] The grinding device is also equipped with an efficient dust collection system, and the dust collection box 2 is installed on the outside of the box body 1 to ensure that the dust generated during the grinding process can be cleaned in time. The dust collection box 2 is provided with a dust collection port, one end of which is connected to the working area inside the box body 1, and the other end is connected to the dust collector through a dust collection pipe, so that the dust generated during the grinding process can be quickly sucked into the dust collection box 2 and transported to the dust collector through the pipe for treatment, effectively preventing the dust from spreading and keeping the working environment clean.

[0063] See Figure 1 , Figure 2 In order to ensure the intelligent level of the grinding process, the grinding device is also equipped with two sets of roughness sensors 5 and two sets of position sensors 6. The two sets of roughness sensors 5 are respectively installed on both sides of the grinding port of the box 1 to monitor the roughness of the grinding surface in real time to ensure that the grinding effect meets the predetermined standards. At the same time, the two sets of position sensors 6 are also arranged on both sides of the grinding port to monitor the position changes of the grinding device in real time. The coordinated work of these sensors enables the grinding device to dynamically adjust the grinding parameters according to the feedback information to ensure the uniformity and accuracy of the entire grinding process.

[0064] Preferably, the mechanical limit wheel 3 adopts a disc structure design, and the outer wall is covered with a layer of polyurethane material, which can effectively prevent the mechanical steel from directly contacting the wind turbine blades, and reduce the damage to the blades that may be caused by friction or impact. The polyurethane material has good elasticity and buffering properties, and can provide a soft contact force, ensuring that the impact of the mechanical limit wheel 3 on the blades is minimized during the grinding process.

[0065] like Figure 7As shown, the slot 101 is located at the top of the slot telescopic member 10, the interior of which is a rectangular cavity, and the middle part extends outward to form a notch, and the shape is roughly an inverted "T" shape. Through this structure, when replacing the grinding material 4, the slot 101 can be quickly inserted from one side of the end face of the roller 9 to complete the installation of the grinding material 4. In a preferred embodiment, a plug can be set on one side of the slot 101 to seal the grinding material 4 in the slot 101.

[0066] like Figure 8 , Fig. 9 As shown, the present invention also provides a method for adjusting the length of a grinding material, the adjustment method is implemented by the grinding device, and the adjustment method comprises the following steps:

[0067] Step S100, collecting real-time detection values ​​of the roughness sensor;

[0068] In the present invention, there are two groups of roughness sensors, which are respectively installed on the boxes on both sides of the grinding port of the grinding device. These sensors can detect the roughness changes of the blade surface during the grinding process in real time and transmit the detection values ​​to the control system.

[0069] Step S200, obtaining a position signal of a position sensor;

[0070] Position sensors are also installed on both sides of the grinding port of the grinding device to detect the actual position of the grinding device relative to the blade in real time. The sensor continuously collects the position data of the device and feeds these position signals back to the control system. By analyzing the data, it can determine whether the grinding device is in the predetermined position range.

[0071] Step S300, comparing the real-time detection value with the preset roughness parameter;

[0072] In this step, first obtain the preset range of roughness parameter values, which represent the ideal surface roughness standard. Then, based on the roughness sensor data collected in real time, determine whether the current detection value exceeds the preset roughness value range. If the real-time detection value exceeds the range, the system will generate an adjustment signal, indicating that the length of the grinding material needs to be adjusted to achieve a better grinding effect. If the real-time detection value is within the preset range, it means that the grinding effect meets the standard, and the system will maintain the current length of the grinding material without any adjustment. This process ensures that the roughness during the grinding process is always kept in the best state through continuous monitoring and adjustment.

[0073] Step S400, determining whether the position signal does not meet a preset trigger condition;

[0074] In this step, first obtain the current position signal fed back by the position sensor to monitor the position of the device in real time. Then, compare the currently acquired position signal with the preset standard position signal to determine whether the device is in the ideal working position. If the position signal does not meet the set standard, it is considered that the grinding device does not meet the trigger condition and needs to be adjusted. If the position signal meets the standard, it means that the grinding device is in the correct position, and the system does not need to adjust the position anymore, and the subsequent grinding operation can continue.

[0075] Step S500, generating a rotation instruction according to the comparison result of step S300 and the determination result of step S400;

[0076] First, based on the deviation determined by the roughness sensor, a correction signal is generated to adjust the exposed length of the grinding material to ensure that the grinding effect meets the expected standard. Then, based on the deviation determined by the position sensor, a position adjustment signal is generated to ensure that the grinding device remains in the correct position. Next, the system combines the correction signal and the position adjustment signal to form the final control instruction. Finally, after receiving the control instruction, the transmission mechanism drives the rotation of the telescopic gear sleeve, thereby adjusting the length of the grinding material and the position of the grinding device, thereby ensuring the accuracy and effect of the grinding process.

[0077] Step S600, transmitting the rotation instruction to the transmission mechanism and starting the rotation thereof, and driving the slot telescopic member to extend or contract through the transmission mechanism to adjust the exposed length of the grinding material in the slot;

[0078] Step S700, output the exposed length information of the polishing material to the control program and end the current adjustment process.

[0079] Preferably, the generation of the rotation instruction is achieved by the following data fusion algorithm:

[0080] According to the real-time data from the roughness sensor and the position sensor, the sensor feedback signals are fused by using the weighted average method, wherein the feedback signal of each sensor is assigned different weight coefficients according to its importance and accuracy;

[0081] The data from different sensors are weighted by the set weight coefficient to generate a fused signal, which contains the accurate requirements for the length adjustment of the grinding material;

[0082] The fused control command is transmitted to the transmission mechanism to start its rotation, thereby adjusting the extension or contraction of the slot telescopic member.

[0083] like Fig. 9As shown, the power input is connected to the system through the three-phase power lines L1, L2 and L3 to provide working power for the servo control box and various electrical components; SB1, SB2, SB3 are input signals and button controls, which are used to control the start, stop and adjustment of the grinding device respectively. The function of each button is to start the motor or adjust the position by controlling different circuit paths; U11, U12, U13 are sensors, which are used to detect different positions or monitor the working status of the grinding device respectively; KM1, KM2, KM3 are contactors of the motor, which control the start and stop of the motor by controlling the on and off of the current, and then drive the movement of the telescopic gear sleeve; when the start button SB1 is pressed, the current enters the motor through the corresponding contactor (such as KM1) to start the motor; when the system needs to adjust the telescopic gear sleeve, KM2 and KM3 play a switching and adjustment role to ensure that the motor can work in reverse or forward direction; FR is part of the dust collection system, which is connected to the dust collector through the dust collection pipe to ensure that the dust generated during the grinding process can be sucked away in time to keep the working environment clean.

[0084] The design process of the entire control logic diagram is: the motor is controlled to start and stop through the input signal, and the motor drives the telescopic gear sleeve to adjust the length of the grinding material. The sensor monitors the state and surface roughness of the grinding material in real time, and the control program adjusts the motor according to the feedback signal to ensure the uniformity and effectiveness of the grinding process. In addition, the dust collection system works in conjunction with the mechanical limit wheel to keep the environment clean and stabilize the grinding process.

[0085] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A grinding device for adjusting the length of a grinding material, characterized in that: The grinding device comprises a box body, a roller, a transmission mechanism, a grinding motor, a mechanical limit wheel, a telescopic gear sleeve, a toggle connecting rod, a slot telescopic part, a roller fixed shaft, and a grinding material; The mechanical limit wheels are fixed on both sides of the box body, the roller fixed shaft is transversely installed in the box body, and its two ends are arranged with the mechanical limit wheel bearings, the roller is fixed on the outer wall of the roller fixed shaft, and the box body is provided with a grinding opening, and part of the grinding contact surface of the roller extends out of the grinding opening; The roller fixed shaft is connected with the telescopic gear sleeve bearing, the telescopic gear sleeve is located on one side of the roller, the end face of the telescopic gear sleeve is penetrated with a plurality of toggle grooves along the axial direction, the toggle connecting rods are inserted into the plurality of toggle grooves, the other end of the toggle connecting rod is fixed to one end of the slot telescopic member, the other end of the slot telescopic member is provided with a slot, the grinding material is fixed in the slot, the roller is provided with a plurality of separation grooves, the plurality of separation grooves radiate outward from the center of the roller end face, and extend along the length direction of the roller until close to the other end face of the roller, each of the slot telescopic member and each of the grinding materials are arranged in the separation grooves; The transmission mechanism is installed on the side wall of the drum, and its output end is connected to the gear of the telescopic gear sleeve; The grinding motor is mounted on the outer surface of the box body, and the output end of the grinding motor is connected to the roller fixed shaft through a driving member.

2. The grinding device for adjusting the length of the grinding material according to claim 1, characterized in that: The toggle grooves are evenly distributed on the end surface of the telescopic gear sleeve, and the grooves are curved.

3. The grinding device for adjusting the length of the grinding material according to claim 1, characterized in that: The polishing device also includes a dust suction box, which is installed on the box body. The dust suction box is provided with a dust suction port, one end of which is connected to the inside of the box body, and the other end is connected to the dust collector through a dust suction pipe.

4. The grinding device for adjusting the length of the grinding material according to claim 1, characterized in that: The grinding device also includes two groups of roughness sensors and two groups of position sensors, wherein the two groups of roughness sensors are respectively arranged on the box body at both sides of the grinding port, and the two groups of position sensors are respectively arranged on the box body at both sides of the grinding port.

5. The grinding device for adjusting the length of the grinding material according to claim 1, characterized in that: The mechanical limiting wheel is a disc structure, and a layer of polyurethane material is arranged on its outer wall.

6. The grinding device for adjusting the length of the grinding material according to claim 1, characterized in that: The slot is located at the top of the slot telescopic member, and the interior of the slot is a rectangular cavity, with a middle portion extending outward to form a notch.

7. A method for adjusting the length of a grinding material, characterized in that: The adjustment method is implemented by the grinding device according to claim 4, and the adjustment method comprises the following steps: Step S100, collecting real-time detection values ​​of the roughness sensor; Step S200, obtaining a position signal of a position sensor; Step S300, comparing the real-time detection value with the preset roughness parameter; Step S400, determining whether the position signal does not meet a preset trigger condition; Step S500, generating a rotation instruction according to the comparison result of step S300 and the determination result of step S400; Step S600, transmitting the rotation instruction to the transmission mechanism and starting the rotation thereof, and driving the slot telescopic member to extend or contract through the transmission mechanism to adjust the exposed length of the grinding material in the slot; Step S700, output the exposed length information of the polishing material to the control program and end the current adjustment process.

8. A method for adjusting the length of a grinding material as claimed in claim 7, characterized in that: The comparison in step S300 is performed in the following manner: Step S301, obtaining a preset roughness parameter value range; Step S302: judging whether the real-time detection value exceeds a preset roughness value range according to the real-time detection value of the roughness sensor; Step S303: if it exceeds the range, an adjustment signal is generated to indicate that the length of the grinding material needs to be adjusted; Step S304: If the real-time detection value is within the preset range, the current length is maintained without adjustment.

9. A method for adjusting the length of a grinding material as claimed in claim 7, characterized in that: The determination in step S400 is performed in the following manner: Step S401, obtaining a current position signal fed back by a position sensor; Step S402, comparing the current position signal with a preset position signal standard; Step S403: If the position signal of the position sensor does not reach the set standard, it is considered that the trigger condition is not met; Step S404: If the standard is met, it is considered that the trigger condition is met and no further position adjustment is required.

10. A method for adjusting the length of a grinding material according to claim 7, characterized in that: The generation of the rotation instruction in step S500 is achieved in the following manner: Step S501, generating a correction signal according to the roughness data deviation determined in step S300, wherein the correction signal is used to adjust the length of the grinding material; Step S502, generating a position adjustment signal according to the position signal deviation determined in step S400; Step S503, combining the correction signal and the position adjustment signal as a control instruction for the transmission mechanism; Step S504: Execute the control instruction and adjust the rotation angle of the telescopic gear sleeve through the driving of the transmission mechanism.

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