Method for detecting dryness and humidity of grinding wheel in front of kiln

Abstract

The invention discloses a method for detecting dryness and humidity of a grinding wheel in front of a kiln, which comprises the following steps: step 1, mixing: weighing raw materials, and uniformly mixing and stirring the weighed raw materials and a color developing agent in sequence; step 2, molding: weighing an appropriate weight of ingredients, putting the ingredients into a molding mold, flattening, and carrying out compression molding to obtain a green body; step 3, drying: drying the pressed and molded green body, and the color developing agent presents different colors when the green body has different water contents so as to reflect the dry-wet degree of the grinding wheel green body, the color developing agent shows the color when the water is contained, and when the green body does not show the color or shows another color after being completely dried, the completion of drying of the green body can be judged; fourthly, sintering is conducted, the dried grinding wheel green body is sintered and cured, finally, after sintering is completed, the color of the grinding wheel green body needs to be in a stable state or disappears, and a grinding wheel body can be obtained; in the grinding wheel drying process, the dry-wet degree of the grinding wheel can be judged more visually by observing the color of the grinding wheel green body.

Description

Technical Field

[0001] The invention relates to the technical field of grinding wheel production, in particular to a method for detecting the dryness and wetness of a grinding wheel in front of a kiln. Background Art

[0002] Grinding wheel, also known as bonded abrasive, is the most widely used type of abrasive in grinding. When it rotates at high speed, it can perform rough grinding, semi-finishing grinding, fine grinding, grooving and cutting on the outer circle, inner circle, plane and various profiles of metal or non-metal workpieces. It is generally composed of abrasive, binder and pores, which are often called the three elements of bonded abrasive.

[0003] However, when the current grinding wheel is manufactured, it is impossible to judge the dryness and wetness of the grinding wheel blank, which makes it inconvenient to sinter and solidify the grinding wheel blanks with the same water content. As a result, during the manufacturing process of the previous grinding wheel, due to different dryness and wetness, the sintered and solidified grinding wheel blanks have cracks and a low yield rate. Therefore, we proposed a method for detecting the dryness and wetness of the grinding wheel before the kiln to solve the above-mentioned problems. Summary of the invention

[0004] The object of the present invention is to provide a method for detecting the dryness and wetness of a grinding wheel in front of a kiln, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A method for detecting the dryness and wetness of a grinding wheel in front of a kiln comprises the following steps: Step 1: Mixing: weigh the raw materials, and mix the weighed raw materials and the color developer in sequence and stir evenly; Step 2: Forming: weigh the ingredients of appropriate weight, put them into a forming mold, flatten them, and press them into a green body; Step 3, drying, drying the pressed green body. The color of the developer is different when the moisture content of the green body is different, thus reflecting the dryness and wetness of the grinding wheel green body. The developer shows color when it contains water. When the green body is completely dry, it does not show color or shows another color, which means that the green body is dried. Step 4: sintering, sintering and curing the green grinding wheel after drying. After sintering, the color of the green grinding wheel needs to be stable or disappear, and the grinding wheel body can be obtained.

[0006] As a further solution of the present invention: in the step 1 of mixing, the raw materials are weighed, and the weighed raw materials and the color developer are mixed and stirred in sequence, and the ingredients include the following components in parts by weight: 65-85 parts of silicon carbide, 21-25 parts of white corundum abrasive, 10-12 parts of ceramic binder, 1-2 parts of fluorite powder, and 3-6 parts of wetting agent.

[0007] As a further solution of the present invention: in the step 1 of mixing, the raw materials are weighed, and the weighed raw materials and the color developer are mixed and stirred in sequence, and the ingredients include the following components in parts by weight: 70-80 parts of silicon carbide, 20-26 parts of white corundum abrasive, 8-10 parts of ceramic binder, 1-1.5 parts of fluorite powder, and 5-7 parts of wetting agent.

[0008] As a further solution of the present invention: in the step 1 of mixing, the raw materials are weighed, and the weighed raw materials and the color developer are mixed and stirred in sequence, and the ingredients include the following components in parts by weight: 72-28 parts of silicon carbide, 22-25 parts of white corundum abrasive, 9-13 parts of ceramic binder, 2-3 parts of fluorite powder, and 3.5-5 parts of wetting agent.

[0009] As a further solution of the present invention: in the step 1 of mixing, the raw materials are weighed, and the weighed raw materials and the color developer are sequentially mixed and stirred evenly, and the color developer is one or more chemical reagents that react with water to develop color.

[0010] As a further solution of the present invention: the color developer includes solid or liquid. When the color developer is solid, it needs to be crushed into powder, and then the powdered color developer is blended and ground with the diluent before mixing. When the color developer is liquid, it is necessary to ensure that it has good fluidity and can be evenly distributed during stirring.

[0011] As a further solution of the present invention: in the step 2 of forming, the ingredients of appropriate weight are weighed, placed in a forming mold, flattened, and pressed to obtain a green body. The pressure required during the forming process is 15 —25 , the pressing time is 10s-20s.

[0012] As a further solution of the present invention: the silicon carbide is modified silicon carbide, the step three of drying is to dry the pressed green body, the color of the developer is different when the moisture content of the green body is different, thereby reflecting the dryness and wetness of the grinding wheel green body, the developer shows color when it contains water, and when the green body is completely dry and shows no color or shows another color, it can be judged that the drying of the green body is completed, and the drying temperature of the grinding wheel green body is 35℃-120℃.

[0013] As a further solution of the present invention: the fourth step is firing, the grinding wheel green body after drying is fired and solidified, and the color of the grinding wheel green body needs to be in a stable state or disappear after the firing is completed, and the grinding wheel body can be obtained, and the firing temperature of the grinding wheel green body is 650℃-1350℃.

[0014] As a further scheme of the present invention: the silicon carbide is modified silicon carbide, and the modification method of the modified silicon carbide is as follows: the silicon carbide is ultrasonically dispersed in deionized water for 25-42 min, and then dodecyltrimethylammonium bromide is added to the solution after ultrasonication, and the mass ratio of dodecyltrimethylammonium bromide to silicon carbide is (0.05-0.09):1; the mixed solution is placed in a 55°C-70°C oil bath and magnetically stirred for 2.5h-3.5h, the obtained mixed solution is separated, filtered and washed, and the washed modified silicon carbide is placed in a 60°C-70°C oven and dried for 8h-14h, and the wetting agent is dextrin liquid or water glass.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The method for detecting the dryness and wetness of the grinding wheel before the kiln can more intuitively judge the dryness and wetness of the grinding wheel by observing the color of the grinding wheel green body during the drying process of the grinding wheel. The color developer shows color when it contains water, and does not show color or shows another color when the green body is completely dry. After the final firing, this color needs to be in a stable state or disappear; thus, it is convenient to select the grinding wheel green body with appropriate moisture content for firing according to the color displayed by the grinding wheel green body, and reduce the problem of cracks in the grinding wheel after firing and reduced yield rate due to different dryness and wetness during the firing process of the previous grinding wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic flow chart of the method for detecting the dryness and wetness of the grinding wheel in front of the kiln according to the present invention. DETAILED DESCRIPTION

[0017] Example 1 like Figure 1 As shown, a method for detecting the dryness and wetness of a grinding wheel in front of a kiln comprises the following steps: Step 1: Mixing: weigh the raw materials, and mix the weighed raw materials and the color developer in sequence and stir evenly; Step 2: Forming: weigh the ingredients of appropriate weight, put them into a forming mold, flatten them, and press them into a green body; Step 3, drying, drying the pressed green body. The color of the developer is different when the moisture content of the green body is different, thus reflecting the dryness and wetness of the grinding wheel green body. The developer shows color when it contains water. When the green body is completely dry, it does not show color or shows another color, which means that the green body is dried. Step 4: sintering, sintering and curing the green grinding wheel after drying. After sintering, the color of the green grinding wheel should be stable or disappear, and the grinding wheel body can be obtained. Step 1: Mixing: weigh the raw materials, mix the weighed raw materials and the developer in sequence and stir evenly, the ingredients include the following components in parts by weight: 65 parts of silicon carbide, 21 parts of white corundum abrasive, 10 parts of ceramic binder, 1 part of fluorite powder, and 3 parts of wetting agent; Step 1: mixing, weighing raw materials, and mixing the weighed raw materials and color developers in sequence and stirring them evenly, wherein the color developers are one or more chemical reagents that react with water to develop color; The color developer includes solid or liquid. When the color developer is solid, it needs to be crushed into powder, and then the powdered color developer is blended and ground with the diluent before mixing. The main purpose is to make the color development effect more evenly distributed. When the color developer is liquid, it needs to ensure good fluidity so that it can be evenly distributed during stirring. Step 2: Forming: Weigh the appropriate weight of ingredients, put them into the forming mold, flatten them, and press them to obtain a green body. The pressure required during the forming process is 15 —25 , the pressing time is 10s-20s; Step 3: Drying: Dry the pressed green body. The color of the developer is different when the moisture content of the green body is different, which reflects the dryness and wetness of the grinding wheel green body. The developer shows color when it contains water. When the green body is completely dry, it does not show color or shows another color, which means that the green body is dried. The drying temperature of the grinding wheel green body is 35°C-120°C. Step three is drying, the pressed green body is dried. The color of the developer is different when the moisture content of the green body is different, thus reflecting the dryness and wetness of the grinding wheel green body. The developer shows color when it contains water. When the green body is completely dry, it shows no color or shows another color, which means that the drying of the green body is completed and can be compared with a standard colorimetric card.

[0018] Step 4: sintering, sintering and curing the green grinding wheel after drying. After sintering, the color of the green grinding wheel needs to be in a stable state or disappear, and the grinding wheel body can be obtained. The sintering temperature of the green grinding wheel is 650°C-1350°C. The silicon carbide is modified silicon carbide, and the modification method of the modified silicon carbide is as follows: ultrasonically dispersing silicon carbide in deionized water for 25-42 minutes, then adding dodecyl trimethyl ammonium bromide to the solution after ultrasonication, and the mass ratio of dodecyl trimethyl ammonium bromide to silicon carbide is (0.05-0.09):1; placing the mixed solution in a 55°C-70°C oil bath and magnetically stirring for 2.5h-3.5h, separating and filtering the obtained mixed solution and washing it, and placing the washed modified silicon carbide in a 60°C-70°C oven and drying it for 8h-14h, and the wetting agent is dextrin liquid or water glass; Example 2 like Figure 1As shown, a method for detecting the dryness and wetness of a grinding wheel in front of a kiln comprises the following steps: Step 1: Mixing: weigh the raw materials, and mix the weighed raw materials and the color developer in sequence and stir evenly; Step 2: Forming: weigh the ingredients of appropriate weight, put them into a forming mold, flatten them, and press them into a green body; Step 3, drying, drying the pressed green body. The color of the developer is different when the moisture content of the green body is different, thus reflecting the dryness and wetness of the grinding wheel green body. The developer shows color when it contains water. When the green body is completely dry, it does not show color or shows another color, which means that the green body is dried. Step 4: sintering, sintering and curing the green grinding wheel after drying. After sintering, the color of the green grinding wheel should be stable or disappear, and the grinding wheel body can be obtained. Step 1: Mixing: weigh the raw materials, mix the weighed raw materials and the developer in sequence and stir evenly, the ingredients include the following components in parts by weight: 70 parts of silicon carbide, 23 parts of white corundum abrasive, 11 parts of ceramic binder, 1.5 parts of fluorite powder, and 5 parts of wetting agent; Step 1: mixing, weighing raw materials, and mixing the weighed raw materials and color developers in sequence and stirring them evenly, wherein the color developers are one or more chemical reagents that react with water to develop color; The color developer includes solid or liquid. When the color developer is solid, it needs to be crushed into powder, and then the powdered color developer is blended and ground with the diluent before mixing. The main purpose is to make the color development effect more evenly distributed. When the color developer is liquid, it needs to ensure good fluidity so that it can be evenly distributed during stirring. Step 2: Forming: Weigh the appropriate weight of ingredients, put them into the forming mold, flatten them, and press them to obtain a green body. The pressure required during the forming process is 15 —25 , the pressing time is 10s-20s; Step 3: Drying: Dry the pressed green body. The color of the developer is different when the moisture content of the green body is different, which reflects the dryness and wetness of the grinding wheel green body. The developer shows color when it contains water. When the green body is completely dry, it does not show color or shows another color, which means that the green body is dried. The drying temperature of the grinding wheel green body is 35°C-120°C. Step three is drying, the pressed green body is dried. The color of the developer is different when the moisture content of the green body is different, thus reflecting the dryness and wetness of the grinding wheel green body. The developer shows color when it contains water. When the green body is completely dry, it shows no color or shows another color, which means that the drying of the green body is completed and can be compared with a standard colorimetric card.

[0019] Step 4: sintering, sintering and curing the green grinding wheel after drying. After sintering, the color of the green grinding wheel needs to be in a stable state or disappear, and the grinding wheel body can be obtained. The sintering temperature of the green grinding wheel is 650°C-1350°C. The silicon carbide is modified silicon carbide, and the modification method of the modified silicon carbide is as follows: ultrasonically disperse the silicon carbide in deionized water for 25-42 minutes, then add dodecyltrimethylammonium bromide to the solution after ultrasonication, and the mass ratio of dodecyltrimethylammonium bromide to silicon carbide is (0.05-0.09):1; the mixed solution is placed in a 55°C-70°C oil bath and magnetically stirred for 2.5h-3.5h, the obtained mixed solution is separated, filtered and washed, and the washed modified silicon carbide is placed in a 60°C-70°C oven and dried for 8h-14h to obtain the modified silicon carbide, and the wetting agent is dextrin liquid or water glass.

[0020] Example 3 like Figure 1 As shown, a method for detecting the dryness and wetness of a grinding wheel in front of a kiln comprises the following steps: Step 1: Mixing: weigh the raw materials, and mix the weighed raw materials and the color developer in sequence and stir evenly; Step 2: Forming: weigh the ingredients of appropriate weight, put them into a forming mold, flatten them, and press them into a green body; Step 3, drying, drying the pressed green body. The color of the developer is different when the moisture content of the green body is different, thus reflecting the dryness and wetness of the grinding wheel green body. The developer shows color when it contains water. When the green body is completely dry, it does not show color or shows another color, which means that the green body is dried. Step 4: sintering, sintering and curing the green grinding wheel after drying. After sintering, the color of the green grinding wheel should be stable or disappear, and the grinding wheel body can be obtained. Step 1: Mixing: weigh the raw materials, mix the weighed raw materials and the developer in sequence and stir evenly, the ingredients include the following components in parts by weight: 85 parts of silicon carbide, 25 parts of white corundum abrasive, 12 parts of ceramic binder, 1-2 parts of fluorite powder, and 6 parts of wetting agent; Step 1: mixing, weighing raw materials, and mixing the weighed raw materials and color developers in sequence and stirring them evenly, wherein the color developers are one or more chemical reagents that react with water to develop color; The color developer includes solid or liquid. When the color developer is solid, it needs to be crushed into powder, and then the powdered color developer is blended and ground with the diluent before mixing. The main purpose is to make the color development effect more evenly distributed. When the color developer is liquid, it needs to ensure good fluidity so that it can be evenly distributed during stirring. Step 2: Forming: Weigh the appropriate weight of ingredients, put them into the forming mold, flatten them, and press them to obtain a green body. The pressure required during the forming process is 15 —25 , the pressing time is 10s-20s; Step 3: Drying: Dry the pressed green body. The color of the developer is different when the moisture content of the green body is different, which reflects the dryness and wetness of the grinding wheel green body. The developer shows color when it contains water. When the green body is completely dry, it does not show color or shows another color, which means that the green body is dried. The drying temperature of the grinding wheel green body is 35°C-120°C. Step three is drying, the pressed green body is dried. The color of the developer is different when the moisture content of the green body is different, thus reflecting the dryness and wetness of the grinding wheel green body. The developer shows color when it contains water. When the green body is completely dry, it shows no color or shows another color, which means that the drying of the green body is completed and can be compared with a standard colorimetric card.

[0021] Step 4: sintering, sintering and curing the green grinding wheel after drying. After sintering, the color of the green grinding wheel needs to be in a stable state or disappear, and the grinding wheel body can be obtained. The sintering temperature of the green grinding wheel is 650°C-1350°C. The silicon carbide is modified silicon carbide, and the modification method of the modified silicon carbide is as follows: ultrasonically disperse the silicon carbide in deionized water for 25-42 minutes, then add dodecyltrimethylammonium bromide to the solution after ultrasonication, and the mass ratio of dodecyltrimethylammonium bromide to silicon carbide is (0.05-0.09):1; the mixed solution is placed in a 55°C-70°C oil bath and magnetically stirred for 2.5h-3.5h, the obtained mixed solution is separated, filtered and washed, and the washed modified silicon carbide is placed in a 60°C-70°C oven and dried for 8h-14h to obtain the modified silicon carbide, and the wetting agent is dextrin liquid or water glass.

[0022] The grinding wheels prepared in Example 1, Example 2 and Example 3 were subjected to hardness testing, workpiece surface scratch testing and tissue uniformity testing, and the test results are shown in Table 1.

[0023] Table 1 hardness Scratches on the workpiece surface Tissue uniformity Example 1 K（2.34） none 5.5 Example 2 K（2.46） none 5.5 Example 3 K（2.63） none 5.5 It can be seen from Table 1 that the grinding wheel product prepared in Example 3 has better hardness, workpiece surface scratches and tissue uniformity.

[0024] The present invention can more intuitively judge the dryness and wetness of the grinding wheel by observing the color of the grinding wheel green body during the grinding wheel drying process. The color developer displays color when it contains water, and does not display color or displays another color when the green body is completely dry. After the final firing, the color needs to be in a stable state or disappear; thus, it is convenient to select a grinding wheel green body with a suitable water content for firing according to the color displayed by the grinding wheel green body, thereby reducing the problem of cracks in the grinding wheel after firing and a reduced yield rate due to different dryness and wetness during the previous grinding wheel firing process.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for detecting the dryness and wetness of a grinding wheel in front of a kiln, characterized in that: The following steps are involved: Step 1: Mixing: weigh the raw materials, and mix the weighed raw materials and the color developer in sequence and stir evenly; Step 2: Forming: weigh the ingredients of appropriate weight, put them into a forming mold, flatten them, and press them into a green body; Step 3, drying, drying the pressed green body. The color of the developer is different when the moisture content of the green body is different, thus reflecting the dryness and wetness of the grinding wheel green body. The developer shows color when it contains water. When the green body is completely dry, it does not show color or shows another color, which means that the green body is dried. Step 4: sintering, sintering and curing the green grinding wheel after drying. After sintering, the color of the green grinding wheel needs to be stable or disappear, and the grinding wheel body can be obtained.

2. A method for detecting the dryness and wetness of a grinding wheel before a kiln according to claim 1, characterized in that: The step 1 is mixing, weighing raw materials, mixing the weighed raw materials and the developer in sequence and stirring them evenly, and the ingredients include the following components in parts by weight: 65-85 parts of silicon carbide, 21-25 parts of white corundum abrasive, 10-12 parts of ceramic binder, 1-2 parts of fluorite powder, and 3-6 parts of wetting agent.

3. The method for detecting the dryness and wetness of the grinding wheel before the kiln according to claim 1 is characterized in that: The step 1 is mixing, weighing raw materials, mixing the weighed raw materials and the developer in sequence and stirring them evenly, and the ingredients include the following components in parts by weight: 70-80 parts of silicon carbide, 20-26 parts of white corundum abrasive, 8-10 parts of ceramic binder, 1-1.5 parts of fluorite powder, and 5-7 parts of wetting agent.

4. The method for detecting the dryness and wetness of the grinding wheel before the kiln according to claim 1 is characterized in that: The step 1 is mixing, weighing raw materials, mixing the weighed raw materials and the developer in sequence and stirring them evenly, and the ingredients include the following components in parts by weight: 72-28 parts of silicon carbide, 22-25 parts of white corundum abrasive, 9-13 parts of ceramic binder, 2-3 parts of fluorite powder, and 3.5-5 parts of wetting agent.

5. The method for detecting the dryness and wetness of the grinding wheel before the kiln according to claim 1 is characterized in that: The step 1 of mixing comprises weighing raw materials, mixing the weighed raw materials and the color developer in sequence and stirring them evenly, wherein the color developer is one or more chemical reagents that react with water to develop color.

6. A method for detecting the dryness and wetness of a grinding wheel before a kiln according to claim 5, characterized in that: The color developer includes solid or liquid. When the color developer is solid, it needs to be crushed into powder, and then the powdered color developer is blended and ground with a diluent before mixing. When the color developer is liquid, it needs to have good fluidity so that it can be evenly distributed during stirring.

7. The method for detecting the dryness and wetness of the grinding wheel before the kiln according to claim 1 is characterized in that: In the second step of molding, the ingredients of appropriate weight are weighed, placed in a molding die, flattened, and pressed to obtain a green body. The molding process requires a pressure of 15 —25 , the pressing time is 10s-20s.

8. The method for detecting the dryness and wetness of the grinding wheel before the kiln according to claim 1 is characterized in that: The step three of drying is to dry the pressed green body. The color of the developer is different when the moisture content of the green body is different, thereby reflecting the dryness and wetness of the grinding wheel green body. The developer shows color when it contains water. When the green body is completely dry, it does not show color or shows another color, which means that the drying of the green body is completed. The drying temperature of the grinding wheel green body is 35°C-120°C.

9. The method for detecting the dryness and wetness of the grinding wheel before the kiln according to claim 1, characterized in that: The fourth step is firing, and the green grinding wheel blank after drying is fired and solidified. After the firing is completed, the color of the green grinding wheel blank needs to be in a stable state or disappear, and the grinding wheel body can be obtained. The firing temperature of the green grinding wheel blank is 650°C-1350°C.

10. The method for detecting the dryness and wetness of the grinding wheel before the kiln according to claim 3, characterized in that: The silicon carbide is modified silicon carbide. The modification method of the modified silicon carbide is as follows: ultrasonically disperse silicon carbide in deionized water for 25-42 minutes, then add dodecyltrimethylammonium bromide to the solution after ultrasonication, and the mass ratio of dodecyltrimethylammonium bromide to silicon carbide is (0.05-0.09):1; place the mixed solution in a 55°C-70°C oil bath and magnetically stir for 2.5h-3.5h, separate and filter the obtained mixed solution and wash it, and place the washed modified silicon carbide in a 60°C-70°C oven and dry it for 8h-14h, so as to obtain the wetting agent, which is dextrin liquid or water glass.

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