Hole filling method for resin grinding wheel

Abstract

The invention discloses a hole filling method for a resin grinding wheel, which comprises the following specific steps: step 1, adding hole filling raw materials into an electric furnace for heating, stirring after the hole filling raw materials begin to melt to uniformly mix the hole filling raw materials, preserving heat after the temperature reaches a set temperature, keeping stirring in the heat preservation process, and naturally cooling to room temperature after the heat preservation is finished to obtain a mixture; 2, a grinding wheel body is installed on a hole filling device, the mixture is heated, and the heated mixture is continuously poured into the hole filling device; 3, after pouring is completed, standing is conducted till the poured mixture is formed, the grinding wheel body is detached, and quality inspection is conducted on the grinding wheel body; the hole filling method can improve the precision of the hole diameter of the center hole of the grinding wheel, absorb vibration and improve the grinding precision.

Description

Technical Field

[0001] The invention belongs to the technical field of grinding wheel manufacturing methods, and in particular relates to a hole filling method for a resin grinding wheel. Background Art

[0002] In the field of mechanical processing, grinding wheels are important grinding tools. Their performance, grinding effect and safety play a key role in processing quality and efficiency. Existing grinding wheel manufacturing technologies mainly include pressing and sintering, single material molding and simple assembly molding. Grinding wheels manufactured by these processes have the following disadvantages: the center hole diameter accuracy of the grinding wheel is low, and vibration is prone to occur during the grinding process, which reduces the grinding accuracy. Summary of the invention

[0003] The purpose of the invention is to provide a method for filling holes in a resin grinding wheel, so as to solve the problems that the diameter precision of the center hole of the existing grinding wheel is low and vibration is easy to occur during the grinding process.

[0004] The technical solution adopted by the present invention is: a method for filling holes in a resin grinding wheel, which is specifically implemented according to the following steps: Step 1, adding the hole filling raw material into an electric furnace for heating, stirring the hole filling raw material to mix the hole filling raw material evenly after it starts to melt, and keeping the temperature after the temperature reaches the target temperature, and stirring is maintained during the insulation process, and naturally cooling to room temperature after the end to obtain a mixture; Step 2, installing the grinding wheel body on the hole filling device, heating the mixture, and continuously pouring the heated mixture into the hole filling device; Step 3: After pouring is completed, let it stand for 15s to 20s until the poured mixture is formed, then remove the grinding wheel body and conduct a quality inspection on the grinding wheel body.

[0005] The present invention is also characterized in that: In step 1, the hole filling raw material is composed of the following raw materials in mass percentage: sulfur 94%~95%, feldspar powder 3%~4%, talc powder 0.5%~1.5%, carbon black 0.5%~1%, and the sum of the mass percentages of the above components is 100%.

[0006] In step 1, the stirring parameters of the mixed raw materials are: stirring time is 30min~60min, and stirring speed is 50r / min~100r / min.

[0007] In step 1, the target temperature is 150°C ± 10°C and the holding time is 5h; The stirring parameters of the insulation process are: stirring once every 30 minutes, each stirring time is 5 minutes, the total stirring time is 30 minutes to 60 minutes, and the stirring speed is 50r / min to 100r / min.

[0008] In step 2, the heating temperature is 140°C ± 5°C.

[0009] In step 2, the hole-filling device includes a base, a slot is provided on the top of the base, a core rod is inserted in the slot, and a plurality of spacers and pouring trays are sequentially sleeved on the core rod from the bottom to the top; The diameter of the portion of the core rod inserted in the slot is smaller than the diameter of the portion outside the slot.

[0010] A first plane is arranged at the top of the base and at one end close to the slot, and a second plane is arranged at the top of the base and at the other end away from the slot. The first plane and the second plane are connected by an inclined plane, the first plane is arranged above the second plane, and the angle between the second plane and the inclined plane is an obtuse angle.

[0011] Each spacer includes a cylindrical body, which is sleeved on a core rod. A trumpet section is arranged on the outer wall of the body. The larger diameter end of the trumpet section is arranged close to the body. The smaller diameter end of the trumpet section is connected to a vertical section. The midline of the vertical section is connected to a circular ring section. A plurality of spacer overflow ports are arranged on the inner wall of the body and along its circumferential direction. Each spacer overflow port is arranged parallel to the core rod and its height is consistent with the height of the body.

[0012] The pouring tray includes a tray body, a conical surface is provided on the side of the tray body close to the core rod, the angle between the conical surface and the core rod is an acute angle, a vertical surface is provided at the bottom end of the conical surface, and a plurality of pouring tray overflow ports are provided on the vertical surface and along its circumferential direction. Each pouring tray overflow port is arranged parallel to the core rod and the height is consistent with the height of the vertical surface. A lifting ring is provided on the side of the tray body away from the core rod.

[0013] The specific process of step 2 is: insert the core rod into the slot, and apply a layer of engine oil on the outer wall of the core rod, and sequentially sleeve a plurality of grinding wheel bodies and a plurality of spacers on the core rod, and a spacer is arranged between two adjacent grinding wheel bodies, and then sleeve a pouring tray on the core rod and the pouring tray is above the grinding wheel body at the top. When sleeved with the spacer and the pouring tray, ensure that the spacer overflow port of each spacer corresponds to the overflow port of the pouring tray one by one, and then heat the mixture, and pour the heated mixture into the pouring tray 5 continuously, and the mixture is injected into the center hole of each grinding wheel body through the overflow port of the pouring tray and the overflow port of the spacer.

[0014] The beneficial effects of the present invention are: (1) The resin grinding wheel grouting method of the present invention can adjust the diameter of the center hole of the grinding wheel body to improve the accuracy of the diameter. At the same time, the grouting material of the present invention can accurately control the firmness of the center hole of the grinding wheel body after grouting. (2) The resin grinding wheel grouting method of the present invention, wherein the sulfur is evenly distributed, thereby enhancing the stability of the overall structure of the grinding wheel body and avoiding local stress concentration. The central hole diameter of the grinding wheel body after grouting serves as a heat dissipation channel, which can effectively reduce the grinding temperature and reduce working thermal damage. At the same time, it has excellent chip removal ability, prevents blockage, and improves the quality of the processed surface. (3) The center hole of the grinding wheel body after the filling method of the resin grinding wheel of the present invention can absorb vibration and reduce processing noise due to the effect of the filling material, which is suitable for high-precision grinding. At the same time, the sulfur is evenly distributed, which reduces the imbalance of centrifugal force during high-speed rotation and prolongs the service life of the grinding wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a hole filling device in the hole filling method of the resin grinding wheel of the present invention; Figure 2 It is a schematic diagram of the structure of the spacer in the hole filling method of the resin grinding wheel of the present invention; Figure 3 for Figure 2 A partial enlarged view of the middle A; Figure 4 It is a schematic structural diagram of the overflow port of the septum in the hole filling method of the resin grinding wheel of the present invention.

[0016] In the figure, 1. base, 2. core rod, 3. grinding wheel body, 4. spacer, 5. pouring plate, 6. slot; 1-1. First plane, 1-2. Second plane, 1-3. Inclined plane; 4-1. horn section, 4-2. annular section, 4-3. body, 4-4. vertical section, 4-5. septum overflow port; 5-1. Pan body, 5-2. Conical surface, 5-3. Lifting ring, 5-4. Overflow port of pouring pan. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Example 1 The hole filling method of the resin grinding wheel of the present invention is specifically implemented according to the following steps: Step 1, adding the hole filling raw material into an electric furnace for heating, stirring the hole filling raw material to mix the hole filling raw material evenly after it starts to melt, and keeping the temperature for 5 hours when the temperature reaches 150°C ± 10°C, stirring is maintained during the insulation process, and naturally cooling to room temperature after the end to obtain a mixture; The raw materials for hole filling are composed of the following raw materials by mass percentage: 94%~95% sulfur, 3%~4% feldspar powder, 0.5%~1.5% talc powder, 0.5%~1% carbon black, and the sum of the mass percentages of the above components is 100%; The stirring parameters of the mixed raw materials are: stirring time is 30min~60min, stirring speed is 50r / min~100r / min; The stirring parameters during the heat preservation process are: stirring once every 30 minutes, each stirring time is 5 minutes, the total stirring time is 30 minutes to 60 minutes, and the stirring speed is 50 r / min to 100 r / min; Step 2, installing the grinding wheel body 3 on the hole filling device, heating the mixture, the heating temperature is 140°C ± 5°C, and pouring the heated mixture into the hole filling device continuously; Step 3, after pouring is completed, let it stand for 15s to 20s until the poured mixture is formed, remove the grinding wheel body 3, and perform quality inspection on the grinding wheel body 3; The quality inspection includes an appearance and size inspection of each grinding wheel body 3 and a sampling inspection of each batch of grinding wheel bodies 3, wherein the sampling inspection includes a static balance test and a rotation test; The static balance test is as follows: check the balancing machine to confirm that the hardness of the balancing shaft is not less than 50HRC, the maximum allowable surface roughness is Ra0.4μm, the hardness of the support is not less than 50HRC, the maximum allowable surface roughness is Ra0.2μm, and the adjustment and verification of the balancer are carried out in accordance with the requirements of GB / T2492-2017 standard; pass the balancing shaft through the center hole of the poured grinding wheel body 3, so that the center plane of the poured grinding wheel body 3 is in a vertical position. For the flat poured grinding wheel body 3, it can be placed in a free position. State, the gap between the balancing shaft and the center hole of the poured grinding wheel body 3 is no more than 0.4mm, put the balancing shaft on the balancer, when the poured grinding wheel body 3 reaches the balanced position and the center of mass is at the lowest point, mark the highest point of the circumference of the poured grinding wheel body 3, rotate the poured grinding wheel body 3 90°, make the mark in the horizontal plane of the axis of the balancing shaft, place a mass block at the circumferential mark, and observe whether the poured grinding wheel body 3 can still maintain balance. The static balance check is carried out in accordance with GB / T2492-2017 standard.

[0019] The rotation test is specifically as follows: install the poured grinding wheel body 3 on the rotary machine, start the rotary testing machine, make the poured grinding wheel body 3 reach the specified rotation speed and maintain it for 30s. If the crushing rate of the poured grinding wheel body 3 does not exceed 5%, the batch of grinding wheels is judged to be qualified. If the crushing rate exceeds 5%, it should be re-tested. When the poured grinding wheel body 3 reaches the test speed, maintain it for 2 minutes. If the crushing rate still exceeds 5%, the batch of poured grinding wheel bodies 3 is judged to be unqualified. The rotation test is performed in accordance with the requirements of GB / T2493-2013 standard, and the rotary machine equipment calibration is based on the requirements of GB / T2493-2013 standard.

[0020] Example 2 On the basis of Example 1, Figure 1 As shown, the hole filling device includes a base 1, a slot 6 is provided on the top of the base 1, a core rod 2 is inserted in the slot 6, a plurality of spacers 4 and a pouring tray 5 are sequentially sleeved on the core rod 2 from the bottom to the top, the spacer 4 is used to isolate two adjacent grinding wheel bodies 3, and the pouring tray 5 is used to pour the hole filling material into the central aperture of each grinding wheel body 3 to adjust the aperture and improve the accuracy of the aperture; The diameter of the portion of the mandrel 2 inserted into the slot 6 is smaller than the diameter of the portion outside the slot 6; A first plane 1-1 is provided at one end of the top of the base 1 and close to the slot 6, and a second plane 1-2 is provided at the other end of the top of the base 1 and away from the slot 6. The first plane 1-1 and the second plane 1-2 are connected by an inclined plane 1-3. The first plane 1-1 is provided above the second plane 1-2, and the included angle between the second plane 1-2 and the inclined plane 1-3 is an obtuse angle. like Figure 2 and Figure 3 As shown, each spacer 4 includes a cylindrical body 4-3, the body 4-3 is sleeved on the core rod 2, the outer wall of the body 4-3 is provided with a trumpet section 4-1, the larger diameter end of the trumpet section 4-1 is arranged close to the body 4-3, the smaller diameter end of the trumpet section 4-1 is connected to a vertical section 4-4, and the midline of the vertical section 4-4 is connected to a circular ring section 4-2, as shown in FIG. Figure 4 As shown, a plurality of spacer overflow ports 4-5 are arranged on the inner wall of the main body 4-3 and along its circumferential direction. Each spacer overflow port 4-5 is arranged parallel to the core rod 2 and the height is consistent with the height of the main body 4-3. The spacer overflow port 4-5 is used to introduce the filling material into the center hole of each grinding wheel body 3.

[0021] The pouring tray 5 includes a tray body 5-1, a conical surface 5-2 is provided on one side of the tray body 5-1 close to the core rod 2, the angle between the conical surface 5-2 and the core rod 2 is an acute angle, a vertical surface is provided at the bottom end of the conical surface 5-2, a plurality of pouring tray overflow ports 5-4 are provided on the vertical surface and along its circumferential direction, each pouring tray overflow port 5-4 is provided in parallel with the core rod 2 and the height is consistent with the height of the vertical surface, a lifting ring 5-3 is provided on one side of the tray body 5-1 away from the core rod 2, the lifting ring 5-3 can facilitate the installation and removal of the pouring tray 5, and the conical surface 5-2 can facilitate the flow of the pouring hole raw material into the overflow port 5-4 of the pouring tray; The number of the pouring tray overflow ports 5-4 is the same as the number of the spacer overflow ports 4-5.

[0022] Example 3 Based on Example 2, the specific process of step 2 is: Insert the core rod 2 into the slot 6, and apply a layer of engine oil on the outer wall of the core rod 2, and sequentially sleeve a plurality of grinding wheel bodies 3 and a plurality of spacers 4 on the core rod 2 at intervals, the number of spacers 4 is one less than the number of grinding wheel bodies 3, and a spacer 4 is arranged between two adjacent grinding wheel bodies 3, and then sleeve a pouring tray 5 on the core rod 2, and the pouring tray 5 is above the grinding wheel body 3 located at the top, and when sleeved with the spacer 4 and the pouring tray 5, ensure that the spacer overflow port 4-5 of each spacer 4 corresponds to the overflow port 5-4 of the pouring tray, and then heat the mixture, and pour the heated mixture into the pouring tray 5 continuously, and the mixture is injected into the center hole of each grinding wheel body 3 through the overflow port 5-4 of the pouring tray and the spacer overflow port 4-5, so as to adjust the aperture of the center hole of the grinding wheel body 3 to improve the accuracy of the aperture; Example 4 The hole filling method of the resin grinding wheel of the present invention is specifically implemented according to the following steps: Step 1, adding the hole filling raw material into an electric furnace for heating, stirring the hole filling raw material to mix the hole filling raw material evenly after it starts to melt, and keeping the temperature for 5 hours when the temperature reaches 150° C., stirring is maintained during the heat preservation process, and naturally cooling to room temperature after the end to obtain a mixture; The raw materials for the hole filling are composed of the following raw materials by mass percentage: 94% sulfur, 4% feldspar powder, 1% talcum powder, and 1% carbon black, and the sum of the mass percentages of the above components is 100%; The stirring parameters of the mixed raw materials are: stirring time is 30min, stirring speed is 100r / min; The stirring parameters during the heat preservation process are: stirring once every 30 minutes, each stirring time is 5 minutes, the total stirring time is 30 minutes, and the stirring speed is 100r / min; Step 2, installing the grinding wheel body 3 on the hole filling device, heating the mixture at a heating temperature of 140° C., and continuously pouring the heated mixture into the hole filling device; The hole-filling device comprises a base 1, a slot 6 is provided on the top of the base 1, a core rod 2 is inserted in the slot 6, and a plurality of spacers 4 and a pouring tray 5 are sequentially sleeved on the core rod 2 from the bottom to the top; The diameter of the portion of the mandrel 2 inserted into the slot 6 is smaller than the diameter of the portion outside the slot 6; A first plane 1-1 is provided at one end of the top of the base 1 and close to the slot 6, and a second plane 1-2 is provided at the other end of the top of the base 1 and away from the slot 6. The first plane 1-1 and the second plane 1-2 are connected by an inclined plane 1-3. The first plane 1-1 is provided above the second plane 1-2, and the included angle between the second plane 1-2 and the inclined plane 1-3 is an obtuse angle. Each spacer 4 includes a cylindrical body 4-3, which is sleeved on the core rod 2. A trumpet section 4-1 is arranged on the outer wall of the body 4-3. The larger diameter end of the trumpet section 4-1 is arranged close to the body 4-3. The smaller diameter end of the trumpet section 4-1 is connected to a vertical section 4-4. The center line of the vertical section 4-4 is connected to a circular ring section 4-2. A plurality of spacer overflow ports 4-5 are arranged on the inner wall of the body 4-3 and along its circumferential direction. Each spacer overflow port 4-5 is arranged parallel to the core rod 2 and its height is consistent with the height of the body 4-3.

[0023] The pouring tray 5 includes a tray body 5-1, a conical surface 5-2 is provided on one side of the tray body 5-1 close to the core rod 2, the angle between the conical surface 5-2 and the core rod 2 is an acute angle, a vertical surface is provided at the bottom end of the conical surface 5-2, a plurality of pouring tray overflow ports 5-4 are provided on the vertical surface and along the circumferential direction thereof, each of the pouring tray overflow ports 5-4 is provided parallel to the core rod 2 and the height is consistent with the height of the vertical surface, and a lifting ring 5-3 is provided on one side of the tray body 5-1 away from the core rod 2; The number of the pouring tray overflow ports 5-4 is the same as the number of the spacer overflow ports 4-5.

[0024] The specific process of step 2 is: Insert the core rod 2 into the slot 6, and apply a layer of engine oil on the outer wall of the core rod 2, and sequentially sleeve a plurality of grinding wheel bodies 3 and a plurality of spacers 4 on the core rod 2 at intervals, the number of spacers 4 is one less than the number of grinding wheel bodies 3, and a spacer 4 is arranged between two adjacent grinding wheel bodies 3, and then sleeve a pouring tray 5 on the core rod 2, and the pouring tray 5 is above the grinding wheel body 3 located at the top, and when sleeved with the spacer 4 and the pouring tray 5, ensure that the spacer overflow port 4-5 of each spacer 4 corresponds to the overflow port 5-4 of the pouring tray, and then heat the mixture, and pour the heated mixture into the pouring tray 5 continuously, and the mixture is injected into the center hole of each grinding wheel body 3 through the overflow port 5-4 of the pouring tray and the spacer overflow port 4-5, so as to adjust the aperture of the center hole of the grinding wheel body 3 to improve the accuracy of the aperture; Step 3, after pouring is completed, let it stand for 15 seconds until the poured mixture is formed, then remove the grinding wheel body 3 and perform a quality inspection on the grinding wheel body 3.

[0025] Example 5 The hole filling method of the resin grinding wheel of the present invention is specifically implemented according to the following steps: Step 1, adding the hole filling raw material into an electric furnace for heating, stirring the hole filling raw material to mix the hole filling raw material evenly after it starts to melt, and keeping the temperature for 5 hours when the temperature reaches 160° C., stirring is maintained during the heat preservation process, and naturally cooling to room temperature after the end to obtain a mixture; The raw materials for the hole filling are composed of the following raw materials by mass percentage: 95% sulfur, 4% feldspar powder, 0.5% talc powder, and 0.5% carbon black, and the sum of the mass percentages of the above components is 100%; The stirring parameters of the mixed raw materials are: stirring time is 60min, stirring speed is 50r / min; The stirring parameters during the heat preservation process are: stirring once every 30 minutes, each stirring time is 5 minutes, the total stirring time is 60 minutes, and the stirring speed is 100r / min; Step 2, installing the grinding wheel body 3 on the hole filling device, heating the mixture, the heating temperature is 145° C., and continuously pouring the heated mixture into the hole filling device; Wherein, the hole filling device is the same as that in Example 4; The specific process is: Insert the core rod 2 into the slot 6, and apply a layer of engine oil on the outer wall of the core rod 2, and sequentially sleeve a plurality of grinding wheel bodies 3 and a plurality of spacers 4 on the core rod 2 at intervals, the number of spacers 4 is one less than the number of grinding wheel bodies 3, and a spacer 4 is arranged between two adjacent grinding wheel bodies 3, and then sleeve a pouring tray 5 on the core rod 2, and the pouring tray 5 is above the grinding wheel body 3 located at the top, and when sleeved with the spacer 4 and the pouring tray 5, ensure that the spacer overflow port 4-5 of each spacer 4 corresponds to the overflow port 5-4 of the pouring tray, and then heat the mixture, and pour the heated mixture into the pouring tray 5 continuously, and the mixture is injected into the center hole of each grinding wheel body 3 through the overflow port 5-4 of the pouring tray and the spacer overflow port 4-5, so as to adjust the aperture of the center hole of the grinding wheel body 3 to improve the accuracy of the aperture; Step 3, after pouring is completed, let it stand for 20 seconds until the poured mixture is formed, then remove the grinding wheel body 3 and perform a quality inspection on the grinding wheel body 3.

[0026] Example 6 The hole filling method of the resin grinding wheel of the present invention is specifically implemented according to the following steps: Step 1, adding the hole filling raw material into an electric furnace for heating, stirring the hole filling raw material to mix the hole filling raw material evenly after it starts to melt, and keeping the temperature for 5 hours when the temperature reaches 140° C., stirring is maintained during the heat preservation process, and naturally cooling to room temperature after the end to obtain a mixture; The raw materials for the hole filling are composed of the following raw materials by mass percentage: 94.5% sulfur, 3% feldspar powder, 1.5% talcum powder, and 1% carbon black, and the sum of the mass percentages of the above components is 100%; The stirring parameters of the mixed raw materials are: stirring time is 40min, stirring speed is 80r / min; The stirring parameters during the heat preservation process are: stirring once every 30 minutes, each stirring time is 5 minutes, the total stirring time is 40 minutes, and the stirring speed is 80r / min; Step 2, installing the grinding wheel body 3 on the hole filling device, heating the mixture, the heating temperature is 135° C., and continuously pouring the heated mixture into the hole filling device; Wherein, the hole filling device is the same as that in Example 4; The specific process is: Insert the core rod 2 into the slot 6, and apply a layer of engine oil on the outer wall of the core rod 2, and sequentially sleeve a plurality of grinding wheel bodies 3 and a plurality of spacers 4 on the core rod 2 at intervals, the number of spacers 4 is one less than the number of grinding wheel bodies 3, and a spacer 4 is arranged between two adjacent grinding wheel bodies 3, and then sleeve a pouring tray 5 on the core rod 2, and the pouring tray 5 is above the grinding wheel body 3 located at the top, and when sleeved with the spacer 4 and the pouring tray 5, ensure that the spacer overflow port 4-5 of each spacer 4 corresponds to the overflow port 5-4 of the pouring tray, and then heat the mixture, and pour the heated mixture into the pouring tray 5 continuously, and the mixture is injected into the center hole of each grinding wheel body 3 through the overflow port 5-4 of the pouring tray and the spacer overflow port 4-5, so as to adjust the aperture of the center hole of the grinding wheel body 3 to improve the accuracy of the aperture; Step 3, after pouring is completed, let it stand for 20 seconds until the poured mixture is formed, then remove the grinding wheel body 3 and perform a quality inspection on the grinding wheel body 3.

[0027] The quality of the cast grinding wheel bodies 3 obtained in the above-mentioned Embodiments 4 and 5 was tested, and the results are shown in Table 1.

[0028] Table 1

Claims

1. A method for filling holes in a resin grinding wheel, characterized in that: Follow the steps below to implement it: Step 1, adding the hole filling raw material into an electric furnace for heating, stirring the hole filling raw material to mix the hole filling raw material evenly after it starts to melt, and keeping the temperature after the temperature reaches the target temperature, and stirring is maintained during the insulation process, and naturally cooling to room temperature after the end to obtain a mixture; Step 2, installing the grinding wheel body (3) on the hole filling device, heating the mixture, and continuously pouring the heated mixture into the hole filling device; Step 3, after pouring is completed, the mixture is allowed to stand for 15 seconds to 20 seconds until the poured mixture is formed, and then the grinding wheel body (3) is disassembled and the quality of the grinding wheel body (3) is inspected.

2. The method for filling holes in a resin grinding wheel according to claim 1, characterized in that: In step 1, the hole filling raw material is composed of the following raw materials in mass percentage: sulfur 94%~95%, feldspar powder 3%~4%, talc powder 0.5%~1.5%, carbon black 0.5%~1%, and the sum of the mass percentages of the above components is 100%.

3. The method for filling holes in a resin grinding wheel according to claim 1, characterized in that: In step 1, the stirring parameters of the mixed raw materials are: stirring time is 30min~60min, and stirring speed is 50r / min~100r / min.

4. The method for filling holes in a resin grinding wheel according to claim 1, characterized in that: In step 1, the target temperature is 150°C ± 10°C and the holding time is 5h; The stirring parameters of the insulation process are: stirring once every 30 minutes, each stirring time is 5 minutes, the total stirring time is 30 minutes to 60 minutes, and the stirring speed is 50r / min to 100r / min.

5. The method for filling holes in a resin grinding wheel according to claim 1, characterized in that: In step 2, the heating temperature is 140°C ± 5°C.

6. The method for filling holes in a resin grinding wheel according to claim 1, characterized in that: In step 2, the hole-filling device comprises a base (1), a slot (6) is provided on the top of the base (1), a core rod (2) is inserted into the slot (6), and a plurality of spacers (4) and a pouring tray (5) are sequentially sleeved on the core rod (2) from the bottom to the top; The diameter of the portion of the core rod (2) inserted into the slot (6) is smaller than the diameter of the portion located outside the slot (6).

7. The method for filling holes in a resin grinding wheel according to claim 6, characterized in that: A first plane (1-1) is arranged at the top of the base (1) and at one end close to the slot (6), and a second plane (1-2) is arranged at the top of the base (1) and at the other end away from the slot (6). The first plane (1-1) and the second plane (1-2) are connected via an inclined plane (1-3). The first plane (1-1) is arranged above the second plane (1-2), and the included angle between the second plane (1-2) and the inclined plane (1-3) is an obtuse angle.

8. The method for filling holes in a resin grinding wheel according to claim 7, characterized in that: Each of the spacers (4) comprises a cylindrical body (4-3), the body (4-3) being sleeved on the core rod (2), a trumpet section (4-1) being arranged on the outer wall of the body (4-3), the larger diameter end of the trumpet section (4-1) being arranged close to the body (4-3), the smaller diameter end of the trumpet section (4-1) being connected to a vertical section (4-4), the center line of the vertical section (4-4) being connected to a circular ring section (4-2), a plurality of spacer overflow ports (4-5) being arranged on the inner wall of the body (4-3) and along its circumferential direction, each spacer overflow port (4-5) being arranged parallel to the core rod (2) and having a height consistent with that of the body (4-3).

9. The method for filling holes in a resin grinding wheel according to claim 8, characterized in that: The pouring tray (5) comprises a tray body (5-1), a conical surface (5-2) is provided on one side of the tray body (5-1) close to the core rod (2), the angle between the conical surface (5-2) and the core rod (2) is an acute angle, a vertical surface is provided at the bottom end of the conical surface (5-2), a plurality of pouring tray overflow ports (5-4) are provided on the vertical surface and along its circumferential direction, each pouring tray overflow port (5-4) is provided parallel to the core rod (2) and the height is consistent with the height of the vertical surface, and a lifting ring (5-3) is provided on one side of the tray body (5-1) away from the core rod (2).

10. The method for filling holes in a resin grinding wheel according to claim 9, characterized in that: The specific process of step 2 is as follows: inserting the core rod (2) into the slot (6), and applying a layer of engine oil on the outer wall of the core rod (2), sequentially and spaced apart on the core rod (2), with a spacer (4) arranged between two adjacent grinding wheel bodies (3), and then sleeved on the core rod (2) a pouring tray (5) and the pouring tray (5) being located above the grinding wheel body (3) at the top, and when sleeved on the spacer (4) and the pouring tray (5), ensuring that the spacer overflow port (4-5) of each spacer (4) corresponds to the pouring tray overflow port (5-4) one by one, then heating the mixture, and continuously pouring the heated mixture into the pouring tray 5, and the mixture is injected into the center hole of each grinding wheel body (3) through the pouring tray overflow port (5-4) and the spacer overflow port (4-5).

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