Grinding wheel substrate and process for producing the same

Abstract

The utility model provides a kind of grinding page wheel matrix and its preparation process, it is related to grinding page wheel preparation technical field, including the disc type matrix body made of glass fiber material and epoxy resin glue, the central part of matrix body is equipped with the mounting hole through both ends, the bonding surface of matrix body is equipped with adhesive layer, the bonding surface of matrix body is distributed with gauze blade, each gauze blade is circular equidistant annular distribution on matrix body with mounting hole;The utility model has strong practicability, it is very convenient to use, grinding page wheel matrix is prepared by using epoxy resin glue and glass fiber material, not only improves matrix performance, optimizes appearance, and reduces intermediate heating link and heating time, energy saving reduces energy consumption;Through the cooperation of upper die plate and lower die plate, it reduces the generation of fixed waste, and reduces the emission of volatile matter;Through setting grinding device, it is convenient to polish matrix embryo, improve product precision.

Description

Technical Field

[0001] This invention relates to the field of polishing wheel preparation technology, and in particular to a polishing wheel substrate and its preparation process. Background Technology

[0002] Grinding impellers are widely used in surface treatments such as grinding various profiles, rust removal, paint removal, and weld grinding. In the existing technology, the matrix of grinding impellers is generally made of phenolic resin and glass fiber. However, phenolic resin itself has poor weather resistance, and grinding impellers made of phenolic resin are relatively brittle and easily break under high-speed grinding. In addition, grinding impellers made of phenolic resin also have poor water resistance, heat resistance, and acid and alkali resistance, resulting in high wear of the grinding wheel during use.

[0003] The grinding wheel matrix prepared from phenolic resin requires the addition of solvent to the grinding resin, followed by processes such as molding, heating and pressurizing, high-temperature baking, and demolding. This process is not only energy-intensive and increases enterprise costs, but also results in a large amount of solvent evaporation during preparation, which pollutes the environment and harms the health of workers. Furthermore, the processing generates a large amount of solid waste, further increasing manufacturing costs. Therefore, we propose a novel grinding wheel matrix and its preparation process. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention discloses a grinding wheel matrix and its preparation process. The present invention prepares the grinding wheel matrix by using glass fiber and epoxy resin curing to improve the strength of the grinding wheel matrix and reduce wear.

[0005] To achieve the aforementioned objective, the present invention employs the following technical solution:

[0006] A grinding wheel substrate includes a disc-shaped substrate body made of glass fiber material and epoxy resin. The substrate body has a mounting hole that extends through both ends at the center. The substrate body has an adhesive layer on the mating surface. Gauze blades are distributed on the mating surface of the substrate body, and each gauze blade is distributed in a circular ring with the mounting hole at equal intervals on the substrate body.

[0007] A process for preparing a grinding wheel substrate includes the following steps:

[0008] S1: Material preparation: Cut the fiberglass cloth into discs according to the specifications of the substrate and prepare the epoxy resin adhesive.

[0009] S2: Place the glass fiber cloth into the mold layer by layer. Spray a layer of epoxy resin adhesive on each layer of glass fiber cloth to impregnate the glass fiber cloth.

[0010] S3: Mold closing, extrusion and shaping, and trimming of excess fiberglass cloth outside the mold;

[0011] S4: Thermosetting, which involves heating the glass fiber layer and epoxy resin in the molding die to cure and set the shape;

[0012] S5: Curing and Demolding: Remove the substrate from the mold and inspect its appearance;

[0013] S6: Polishing and shaping: Remove burrs from the substrate surface to make it smooth.

[0014] The thermosetting temperature in S5 is 100-120℃.

[0015] The thermosetting temperature in S5 is 100-120℃.

[0016] The molding die includes a support part, a lower die, an upper die, and a grinding device. The support part consists of a support tube, a bearing plate, and a drain pipe. The bearing plate is located on the upper part of the inner wall of the support tube, and the drain pipe is located on the side of the bearing plate. The lower die is located above the bearing plate, and the upper die is located above the lower die. The lower die and the upper die are fitted together. The grinding device is located above the upper die.

[0017] The support plate has drainage holes, an annular groove in the middle of the upper surface of the support plate, a positioning shaft in the center of the upper surface of the support plate, an external thread on the outer surface of the positioning shaft, and a lower mold on the positioning shaft.

[0018] The lower die has a threaded hole at the center of its lower surface, which is threaded to the positioning shaft. The upper die has an upper threaded hole at the center of its upper surface, and the lower die has an external thread on its side. The upper die is fitted onto the lower die.

[0019] The lower surface of the upper mold is provided with a first cutter head, which is a ring structure with the cutting edge of the first cutter head facing downward. The inner wall of the upper mold is provided with an internal thread, and the upper mold and the lower mold are threadedly connected. The center of the upper surface of the upper mold is provided with a first through hole, and the upper surface of the upper mold is provided with a connecting ring. The side of the connecting ring is provided with an external thread, and the connecting ring is provided with a grinding device.

[0020] The grinding device includes a grinding cylinder and an air nozzle. The grinding cylinder has an opening facing downwards. An internal thread is provided on the inner wall of one end of the grinding cylinder opening. The grinding cylinder is threadedly connected to a connecting ring. An air nozzle is provided on the side of the grinding cylinder and communicates with the grinding cylinder. A second through hole is provided at the center of the upper surface of the grinding cylinder.

[0021] The grinding device also includes a fixing rod. The lower end of the fixing rod is provided with an external thread. The lower end of the fixing rod passes through the first through hole and the second through hole and is set in the upper thread hole. The fixing rod is threadedly connected to the upper thread hole. The lower part of the fixing rod is provided with a second cutter head with the cutting edge facing down. The lower end of the fixing rod is provided with a material collection groove. The upper part of the fixing rod is provided with an air hole in the axial direction. The lower end of the air hole is connected to the material collection groove.

[0022] The grinding wheel matrix and its preparation process described in this invention are highly practical and convenient to use. By using epoxy resin and glass fiber materials to prepare the grinding wheel matrix, the preparation is more convenient, reducing the matrix heating time, saving energy and reducing emissions. The combined use of the upper and lower templates allows for rapid shaping of the mixture, improving production efficiency. The addition of a grinding device facilitates grinding of the matrix blank, improving product precision. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the substrate of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the molding die of the present invention;

[0025] Figure 3 This is a schematic diagram showing the positional relationship between the support portion and the lower mold of the present invention;

[0026] Figure 4 This is a cross-sectional view of the lower mold of the present invention;

[0027] Figure 5 This is a cross-sectional view of the upper mold of the present invention;

[0028] Figure 6 This is a cross-sectional view of the grinding barrel of the present invention;

[0029] Figure 7 This is a three-dimensional structural diagram of the recycling device of the present invention;

[0030] In the diagram: 1. Base body; 2. Mounting hole; 3. Support pipe; 4. Upper mold; 5. Grinding cylinder; 6. Fixing rod; 7. Drain pipe; 8. Bearing plate; 9. Drain hole; 10. Groove; 11. Positioning shaft; 12. Lower mold; 13. Upper thread hole; 14. Lower thread hole; 15. First cutter head; 16. First through hole; 17. Connecting ring; 18. Air nozzle; 19. Second through hole; 20. Second cutter head; 21. Collection trough; 22. Air hole. Implementation

[0031] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0032] Combined with appendix Figures 1-7 A grinding wheel substrate includes a disc-shaped substrate body 1 made of glass fiber material and epoxy resin. The substrate body 1 has a mounting hole 2 that extends through both ends at the center. The substrate body 1 has an adhesive layer on the mating surface. Gauze blades are distributed on the mating surface of the substrate body 1, and each gauze blade is distributed in a circular ring with the mounting hole 2 at equal intervals on the substrate body 1.

[0033] A process for preparing a grinding wheel substrate includes the following steps:

[0034] S1: Material preparation: Cut the fiberglass cloth into discs according to the specifications of the substrate and prepare the epoxy resin adhesive.

[0035] S2: Place the glass fiber cloth into the mold layer by layer. Spray a layer of epoxy resin adhesive on each layer of glass fiber cloth to impregnate the glass fiber cloth.

[0036] S3: Mold closing, extrusion and shaping, and trimming of excess fiberglass cloth outside the mold;

[0037] S4: Thermosetting, which involves heating the glass fiber layer and epoxy resin in the molding die to cure and set the shape;

[0038] S5: Curing and Demolding: Remove the substrate from the mold and inspect its appearance;

[0039] S6: Polishing and shaping: Remove burrs from the substrate surface to make it smooth.

[0040] The thermosetting temperature in S5 is 100-120℃.

[0041] The thermosetting time in S5 is 3 to 5 hours.

[0042] The molding die includes a support part, a lower mold 12, an upper mold 4, and a grinding device. The support part consists of a support pipe 3, a bearing plate 8, and a drain pipe 7. The bearing plate 8 is provided on the upper part of the inner wall of the support pipe 3, and the drain pipe 7 is provided on the side of the bearing plate 8. The lower mold 12 is provided on the upper mold 4 above the lower mold 12. The lower mold 12 and the upper mold 4 are fitted together. The grinding device is provided on the upper mold 4.

[0043] The support plate 8 has drainage holes 9 distributed on it. The upper surface of the support plate 8 has an annular groove 10 in the middle. The upper surface of the support plate 8 has a positioning shaft 11 in the center. The outer surface of the positioning shaft 11 has an external thread. The positioning shaft 11 has a lower mold 12.

[0044] The lower die 12 has a threaded hole 14 at the center of its lower surface, which is threaded to the positioning shaft 11. The upper die 12 has an upper threaded hole 13 at the center of its upper surface, and the lower die 12 has an external thread on its side. The upper die 4 is fitted onto the lower die 12.

[0045] The lower surface of the upper mold 4 is provided with a first cutter head 15, which is a ring structure with the cutting edge of the first cutter head 15 facing downward. The inner wall of the upper mold 4 is provided with an internal thread, and the upper mold 4 is threadedly connected to the lower mold 12. The center of the upper surface of the upper mold 4 is provided with a first through hole 16, and the upper surface of the upper mold 4 is provided with a connecting ring 17. The side of the connecting ring 17 is provided with an external thread, and the connecting ring 17 is provided with a grinding device. The upper mold 4, the first cutter head 15, the first through hole 16 and the connecting ring 17 are on the same central axis.

[0046] The grinding device includes a grinding cylinder 5 and an air nozzle 18. The grinding cylinder 5 has its opening facing downwards. Grinding particles are distributed on the inner wall of the grinding cylinder 5. An internal thread is provided on the inner wall of one end of the opening of the grinding cylinder 5. The grinding cylinder 5 is threadedly connected to the connecting ring 17. An air nozzle 18 is provided on the side of the grinding cylinder 5 and communicates with the grinding cylinder 5. A second through hole 19 is provided at the center of the upper surface of the grinding cylinder 5. The grinding cylinder 5 and the second through hole 19 are on the same central axis.

[0047] The grinding device also includes a fixing rod 6. The lower end of the fixing rod 6 is provided with an external thread. The lower end of the fixing rod 6 passes through the first through hole 16 and the second through hole 19 and is set in the upper thread hole 13. The fixing rod 6 is threadedly connected to the upper thread hole 13. The lower surface of the fixing rod 6 is provided with a second cutter head 20 with the cutting edge of the second cutter head 20 facing downward. The lower end of the fixing rod 6 is provided with a material collection groove 21. The upper axis of the fixing rod 6 is provided with an air hole 22, and the lower end of the air hole 22 communicates with the material collection groove 21.

[0048] The embodiment describes a grinding wheel substrate and its preparation process. In use, fiberglass cloth is first cut into disc shapes according to the substrate specifications, and epoxy resin is prepared. The cut fiberglass cloth is then layered onto the lower mold 12 of the molding die. A layer of epoxy resin is sprayed onto each layer of fiberglass cloth, ensuring the epoxy resin thoroughly impregnates the fiberglass cloth. Excess epoxy resin falls into the support tube 3 through the drain hole 9 for easy recycling. Once the desired thickness is reached, the upper mold 4 is installed on the lower mold 12 for shaping. The first cutter head 15 below the upper mold 4 cuts off excess fiberglass cloth at the edges. The upper mold 4 is rotated and fixed to the lower mold 12. A grinding cylinder 5 is installed on the connecting ring 17, and the second perforation 19 above the grinding cylinder 5 is sealed with a plug. A vacuum pump is connected to the air nozzle 18 to extract the epoxy resin from the upper mold 4 and lower mold 12. After removing excess air from the resin, remove the plug and insert the fixing rod 6 into the second through hole 19 and the first through hole 16. Install the fixing rod 6 into the threaded hole 13. During the installation process, the second cutter head 20 cuts out the installation hole 2. Remove the grinding cylinder 5 and the fixing rod 6, and send air into the air hole 22 to discharge the waste glass fiber cloth and epoxy resin in the material collection tank 21. After reinstalling the fixing rod 6, remove the lower mold 12 from the support plate 8 and send it for heat curing. The heat curing temperature is 100-120℃. After curing, remove the upper mold 4 and the lower mold 12. Pass the fixing rod 6 through the second through hole 19 to pull the substrate blank into the grinding cylinder 5. Pull up and down or rotate the fixing rod 6 so that the inner wall of the grinding cylinder 5 grinds the edge of the substrate blank, making its surface smooth and improving the product precision.

[0049] The parts of this invention not described in detail are prior art. Although the invention has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of the invention. However, those skilled in the art should understand that various changes in form and detail can be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the invention.

Claims

1. A process for preparing a grinding wheel substrate, characterized in that: Includes the following steps: S1: Material preparation: Cut the fiberglass cloth into discs according to the specifications of the substrate and prepare the epoxy resin adhesive. S2: Place the glass fiber cloth into the mold layer by layer. Spray a layer of epoxy resin adhesive on each layer of glass fiber cloth to impregnate the glass fiber cloth. S3: Mold closing, extrusion and shaping, and trimming of excess fiberglass cloth outside the mold; S4: Thermosetting, which involves heating the glass fiber layer and epoxy resin in the molding die to cure and set the shape; S5: Curing and Demolding: Remove the substrate from the mold and inspect its appearance; S6: Polishing and shaping: Remove burrs from the substrate surface to make it smooth; The molding die includes a support part, a lower mold (12), an upper mold (4) and a grinding device. The support part is composed of a support pipe (3), a bearing plate (8) and a drain pipe (7). The bearing plate (8) is provided on the upper part of the inner wall of the support pipe (3), and the drain pipe (7) is provided on the side of the bearing plate (8). The lower mold (12) is provided on the upper part of the bearing plate (8), and the upper mold (4) is provided on the upper part of the lower mold (12). The lower mold (12) and the upper mold (4) are fitted together. The grinding device is provided on the upper mold (4). The support plate (8) is provided with drainage holes (9), the upper surface of the support plate (8) is provided with an annular groove (10), the upper surface of the support plate (8) is provided with a positioning shaft (11) at the center, the outer surface of the positioning shaft (11) is provided with an external thread, and the positioning shaft (11) is provided with a lower mold (12). The lower die (12) has a threaded hole (14) at the center of its lower surface. The threaded hole (14) is threaded to the positioning shaft (11). The upper die (12) has an upper threaded hole (13) at the center of its upper surface. The lower die (12) has an external thread on its side. The upper die (4) is fitted onto the lower die (12). The lower surface of the upper mold (4) is provided with a first cutter head (15), which is a ring structure with the cutting edge of the first cutter head (15) facing downward. The inner wall of the upper mold (4) is provided with an internal thread, and the upper mold (4) is threadedly connected to the lower mold (12). The center of the upper surface of the upper mold (4) is provided with a first through hole (16), and the upper surface of the upper mold (4) is provided with a connecting ring (17). The side of the connecting ring (17) is provided with an external thread, and the connecting ring (17) is provided with a grinding device. The upper mold (4), the first cutter head (15), the first through hole (16) and the connecting ring (17) are on the same central axis. The grinding device includes a grinding cylinder (5) and an air nozzle (18). The grinding cylinder (5) has its opening facing downwards. Grinding particles are distributed on the inner wall of the grinding cylinder (5). An internal thread is provided on the inner wall of one end of the opening of the grinding cylinder (5). The grinding cylinder (5) is threadedly connected to the connecting ring (17). An air nozzle (18) is provided on the side of the grinding cylinder (5). The air nozzle (18) is connected to the grinding cylinder (5). A second through hole (19) is provided at the center of the upper surface of the grinding cylinder (5). The grinding cylinder (5) and the second through hole (19) are on the same central axis. The grinding device also includes a fixing rod (6), the lower end of the fixing rod (6) is provided with an external thread, the lower end of the fixing rod (6) passes through the first through hole (16) and the second through hole (19) and is set in the upper thread hole (13), the fixing rod (6) is threadedly connected to the upper thread hole (13), the lower surface of the fixing rod (6) is provided with a second cutter head (20), the cutting edge of the second cutter head (20) faces downward, the lower end of the fixing rod (6) is provided with a material collection groove (21), the upper axis of the fixing rod (6) is provided with an air hole (22), the lower end of the air hole (22) is connected to the material collection groove (21).

2. The preparation process of the grinding wheel substrate according to claim 1, characterized in that: The thermosetting temperature in S5 is 80–120°C.

3. The preparation process of the grinding wheel substrate according to claim 1, characterized in that: The thermosetting time in S5 is 3 to 6 hours.

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