TW379157B - Round-shaped-board-type coloring grinding wheel for cutting purposes and the manufacturing method - Google Patents

Abstract

Provided is a kind of manufacturing method making abrasive particles be scattered in the phenol-resin substrate, forming the round-shaped-coloring grinding wheel for cutting. Including the manufacturing method: a raw grinding wheel preparing process in which under the forming temperature of 60 DEG C~70 DEG C, semi-hot forming the abrasive raw material having colorant into a round shape and a thermal hardening process by heating the raw grinding wheel during the period of 8~10 hours from 135 DEG C~145 DEG C to 155 DEG C~165 DEG C and keeping it at 155 DEG C~165 DEG C for the last 2~4 hours, to allow the phenol-resin be hardened. The abrasive particles contain 0.6~1.0 wt.% of magnesium oxide. The round-shaped-board-type coloring grinding wheel for cutting purposes made by this method would, because of its capability of immediate determination for the different hardness or granule codes, not only improve the operation efficiency, but also make the inventory much easier.

Description

5. Description of the invention (1) The present invention relates to a disc-shaped colored grinding wheel for cutting and a manufacturing method thereof. The disc-shaped colored grinding wheel for cutting can be used to cut a work material made of metal, concrete, or the like. The disc-shaped grinding wheel for cutting is installed in a cutting machine, and cuts a work material made of metal, concrete, or the like by turning. Moreover, it is widely used in the fields of construction, shipbuilding, civil engineering, and power-related processes. This type of cutting disc-shaped grinding wheel must have a different hardness and particle size number corresponding to the type of work material and the required thickness of the cutting surface. The main point is that when the hardness or particle size is different, the disc-shaped grinding wheel for cutting can improve the work efficiency if it can be quickly judged according to the situation. Further, if the disc-shaped grinding wheel for cutting is different in color depending on the diameter, the diameter before abrasion is easily distinguished in the case of abrasion, so it is easy to judge the reduction in abrasion. In this case, if the hardness or particle size number and diameter are printed on the surface of the grinding wheel or the mark (1 abe 1) indicating the hardness or particle size number is affixed to the surface of the grinding wheel, the mark will peel off with use 'or It makes the printing thinner, so it is not easy to quickly judge the grinding wheel or the reduction of wear. To this end, a colored disc-shaped grinding wheel was manufactured to discriminate the grinding wheel based on the color. The colored grinding wheel is configured by dispersing abrasive particles in a matrix of a phenol resin. The raw abrasive prepared by adding pigment is dehydrated and granulated, and the forming temperature is 40-50. Below C, a semi-hot (green) wheel is formed into a circular plate. This green grinding wheel is processed at 170 ° C. to 190 ° C. for 6 to 7 hours, and the resin is hardened to produce a cutting disc type grinding wheel.

V. Description of the invention (2) However, firing is performed, and the opposite is not clear and the touch is poor, and because the cutter wheel is bent, the disc-shaped coloring wheel has enough, that is, the cut provides a one-color grinding wheel. The grinding wheel advances too much under strong temperature, and the grinding surface is good. It is cut by the manufacturer and durable. It is a type of colored disc plate ~ 7 0 0 C. The shape is from 135. Keep the process. In order to make the color vivid, the physical properties and the durability are deteriorated at low temperature. In the case of firing, "not only the color that appears" causes a problem that the cutting edge is detached during cutting, making cutting difficult. The incorporation was not smooth, which resulted in a disc-shaped sand. The sharp, abrasive grains were divided into colored wheels of the wheel, and the disc-shaped C ~ 145 was set at 155. The above-mentioned original conventional works are thus produced, 'If it is also high in hardness, it will be produced because the blade contact is not a problem. The above conditions of the grinding wheel and its toughness. The present invention is a cutting disc for cutting. It is a raw abrasive with a forming temperature of 60 grit. The semi-heated wheel is in the range of 8 to 10 hours. 2 to 4 small series of resin hardened magnesium oxide. The manufacturer of the present invention is 110 to 120 ° C, and can be made to contain 0.2 to 0.6% by weight. In addition, according to the present invention, a disc-shaped colored grinding wheel is used. The purpose is to provide a disc-shaped colored sand for cutting and an appropriate hardness. Manufactured in a matrix of a hope resin. A method for manufacturing a wheel, which includes a process for producing pigments, resin raw materials, and a green grinding wheel; C rose to 155. (M65 c, so that the phenolic abrasive contains 0.6 to 1.0% by weight. The semi-thermoformed base plate is controlled to be controlled at 60 ° C. Moreover, the original abrasive is ideal. A method manufactured by the above method Cut off

Page 5 'Explanation of the invention (3) Furthermore, according to the present invention, a disc-shaped colored grinding wheel with a hardness of 5 to 20% and a strong cutting is provided. A brief explanation of the drawings of ~ 4mm: Figure 1 shows a schematic cross-sectional view of the outline of a semi-thermoforming device. Figure 2 shows a schematic cross-sectional view of the firing method of a green grinding wheel; and Figure 3 shows a disc-shaped coloring for cutting Graph of sintered wheels of a grinding wheel. An example of the incoming part Description of the best embodiment v The disc-shaped colored grinding wheel for cutting is formed by dispersing abrasive particles in a matrix of a phenol resin. The cutting disc-shaped colored grinding wheel according to the present invention has a temperature of 60 to 70 after passing through the second stage. Under C, a process of semi-hot forming a raw green yarn wheel including pigment, resin, abrasive grains, etc. and 0.6 to 1.0% by weight of magnesium oxide, and by making the green grinding wheel Ν 135 ° C ~ 145 in 8 ~ 丨 0 hours. ° C rises to 155. C ~ 165. C and kept at 155 C ~ 1 65 for the last 2 to 4 hours. C is manufactured by a thermosetting process for hardening a phenol resin. In addition to the pigment, resin raw materials, and abrasive grains, the original abrasive also contains 0.6 to 1.0% by weight of magnesium oxide. Because by adding magnesium oxide to improve the hardness of the grinding wheel, and further increase the sharpness. In addition, when added together with a coloring agent (c0〇rant), it has the effect of making the color more vivid. The reason for setting it to 〇6 ～ 丨 .〇wt% is: if the speech is less than 0.6wt%, the long-term performance will decrease; in the case of # over ^ 〇〇wt%, the hardness becomes large, which not only makes the sharpness Deterioration and at the same time hinder the hardening reaction of the resin. The content of magnesium oxide is preferably 0.7 to 0.9% by weight.

Page 6 5. Description of Invention (4) Land. For the abrasive grains, it is possible to use alumina powder (alundum, Al203, 96% by weight), white aluminum powder (white alundum, Al203, 98% by weight), and sintered abrasive (Al203, 99% by weight). ), Green carbon (green carbon, Si2〇) and so on. As the resin raw material, formaldehyde can be used. Pigments can be used in different colors depending on the purpose. Fe2 03 (iron oxide red) can be used for red (J IS Η: 3- 5R / V: 3_5, C: ho), and Fe20 can be used for yellow (JIS H: 4_5YR / V: 6_7, C: 12_14). · H20 (yellow iron oxide), green (JIS H: 5-6G / V: 2_3, C can be used in the case of C. · nZnO (cobalt green, cobalt green), blue (JIS H: 3_6B / V: 4) -6, C: 6_10) can use Na6A16 (Si04) 6 · 2Na304 (ultramarine), white (JISH: white, N: 8 5_9 5, C: 3_5) can use τ i 〇2 (titanium oxide) It is preferable that the original abrasive contains 0.2 to 0.6% by weight of a pigment. In addition to the foregoing, a filler, a hardener, and the like may be added to the original abrasive in addition to the above. Specifically, as the filler, a coloring agent (c0 rant, Na3A1Fe) having a function of increasing hardness can be used, and a hardening agent can be a stone salt that can help stabilize the hardness of the entire grinding wheel. The content of iron oxide in the present invention 'in the original abrasive' is 0.2 to 0.6. Π 疋 is only better than the above: in addition to making the color more vivid, the thermal conductivity of the color wheel can be improved, At the same time, it also has the effect of ^: ^ rubbing heat removal at the time of cutting. When the content is G · 2 ~ G.6% by weight ', / 〇 · 2% by weight, the above effects cannot be fully obtained, and

Page 7 V. Description of the invention (5) When it exceeds 0.6% by weight, its cost becomes high. The mixture obtained by the above mixing is dehumidified and granulated to form a raw abrasive (g r a i η, fine particles). For example, dehumidification is at 50 to 6 ORh, about 20. C and so on for 4 hours under low humidity and room temperature. The granulation can be carried out by placing the dehumidified mixture on a 20 to 40 mesh sieve. Sizing is an important process that prevents the wheels from becoming brittle by removing the remaining free components that are not adsorbed on the abrasive particles. A green grinding wheel can be obtained by forming the raw abrasive at a forming temperature of 60 to 70 ° C and semi-hot forming into a disc shape. The semi-thermoforming can be performed using the apparatus shown in FIG. Firstly, the heat is applied to the surface 5 of the press to heat the substrate 4 to 110 to 120 ° C, so that the temperature of the upper surface 11 of the substrate is 60 to 70. c to adjust the forming temperature. Next, in the model 3 for a disc-shaped grinding wheel, a half-capacity raw abrasive was uniformly injected to obtain a lower layer 8. Next, the upper surface of the lower layer 8 is entirely covered with a reinforcing material 6 made of glass cross, and the remaining half capacity of the original abrasive is put thereon, and then the top surface is flattened with a roller (rol ler). Finally, the press 2 was pressurized at 180 kg for 3 to 4 seconds to obtain a green grinding wheel. The right forming temperature is 60 to 70. The word c is 20% higher than the conventional method. C 'increases the density of the grinding wheel, and can improve its toughness and financial properties. By making the green grinding wheel from 140 in 8 to 10 hours. C rose to 155. ’At the same time, the resin is thermally hardened by holding at 16 5 ° C for the last 2 to 4 hours of the above 8 to 10 hours. 0165 at 155

Page 8 V. Description of the invention (6) ------- Type colored wheel. The raw shirt wheel is heat-treated in a laminated state. Specifically, for example, in the figure, 7 parallel plywood plates 13 (thickness 0.6 to 0.7 mm) are arranged between 7 f j j wheels Η as a set, wherein the parallel plywood plate 13 and the green grinding wheel 14 are the Mutual β is set again. The 20 thick layers with the stable thick plate 12 intervened between each group were put into firing, middle 'for reduction. χ, from the viewpoint that heat treatment can be performed uniformly. The parallel plywood 13 uses iron articles having excellent thermal conductivity rather than hardening the resin. The above heat treatment first removes water from the raw grindstone and melts the resin. Regarding water removal, for example, at 100. 10 hours under c. Regarding the melting of the resin, for example, it is 30 °. Under c for 7 hours. In addition, water removal from the green grinding wheel, melting of the resin, and hardening of the resin can be continuously performed in a firing furnace. The heat-treated resin has a curing temperature from 135. c ~ 145. c to 155. The reason for C to 165 ° C. is in excess of 165. At a high temperature of 〇, the premature hardening of the meeting causes the poor formation of the reaction pores as shown in Fig. 3 and deteriorates the sharpness. In addition, the addition of an oxidation ball tends to increase the hardness excessively. #In addition, the effect of magnesium oxide on hardness can be removed by hardening at the above temperature. In addition, if the resin hardening is performed under the old age, the color sharpness of the 'coloring wheel' will be inferior _: / dish, and it is not easy to obtain a bright color. On the other hand, under 135. At the degrees of C and I, the resin's hardening reaction is insufficient, making the hardness and toughness of the grinding wheel insufficient. In addition, the heat-treated resin has a curing temperature from 14 °. c begins to rise to "ο

V. Description of the invention (7) When heat-treated resin hardens, ask & ^ 2 ~ ", when keeping the two small knowledge low '4 I get enough toughness", because J: for the mystery of the hardening temperature is worse than long-lasting. ,,, to go to enough strength and toughness, and It is brittle and resistant to failure. I: Second, even if heat curing is performed for more than 10 hours, the strength and toughness can be increased than the above. The cutting disc type manufactured by the method described above Colored wheels, because of the different conditions of different hardness or grain size of the wheel = broken two: can improve operating efficiency, while making inventory management capacity can cause grinding cans. And because of the appropriate hardness = make = two good to Good, at the same time, when cutting, the grinding wheel does not produce Π Example m The detailed examples are used, but the present invention is not limited to this example (Example 1) Production and production of L color Γ knife disc coloring A wonderful wheel, measure its density, hardness, and toughness, and carry out a cutting test. The manufacturing of the rugged wheel is performed as follows. First, put 80 kg of iron (red iron oxide) 0.4 kg and water in the 1001 adapter. Phenol (showa polymer tru, rolled BRL-219) 4 kg. At 25 ± 5. c. Mix for 3 minutes. 'Liquid phenol containing about 20% by weight of water. First, the phenol in water is sufficiently wetted to make the abrasive grains of the resin raw material uniform and the phenol is added to the mill by 2 ~ 5% by weight of aqueous phenol is preferred. This is :: Earth infiltration.乂 u 芍 less than 2% by weight

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If the hardness becomes too high, the toughness of the grinding wheel becomes worse; if it exceeds 5% by weight, the sharpness becomes worse. Next, 3 kg of phenol (manufactured by Showa Polymer Co., Ltd., BRP_511), 3 kg of epoxy (epoxy) phenol (BRP-808, manufactured by Showa Polymer Co., Ltd.), 4 kg of colorant, and oxidation were mixed. Magnesium 0.8 kg and stone salt 0.8 male jt. Put it into the 1501 coupler at 25 ± 5. The mixture was mixed for 5 minutes under c. The epoxidized phenol-based resin was prepared by introducing an epoxy group into the phenol-based resin. The formation of bridges has the effect of improving the toughness of the grinding wheel. The addition amounts of phenol and epoxidized phenol are preferably 2 to 5% by weight and 6 to 10% by weight, respectively. If the value is less than the above value, the strength and toughness of the grinding wheel will be deteriorated, and when it exceeds the value In the middle, the hardness becomes too large and the sharpness becomes worse. In addition, the addition amount of the colorant is preferably 3 to 7% by weight, because if it is less than 3% by weight, proper hardness cannot be obtained, and when it exceeds 7% by weight, the hardness becomes too large, and Sharpness becomes worse. The addition amount of the stone salt is preferably from 0.6 to 1.0% by weight, because if the content is less than 0.6% by weight, the durability of the grinding wheel is deteriorated, and when the amount exceeds 丨 0.0% by weight However, the hardness becomes too large, and not only the sharpness becomes worse, but also the hardening reaction of the resin is hindered. Next, the above-mentioned mixture is at a humidity of 50 to 60 Rh and a temperature of about 20 °. After being left to stand for about 4 hours under the condition of c for dehumidification, it was placed on a sieve with a sieve of 20 to 40 to perform granulation to obtain the original abrasive (fine particles). Next, put the original abrasive (fine particles) at 60 ~ 70. At C forming temperature, semi-hot forming into a disc shape can obtain a green grinding wheel. The semi-thermoforming can be performed using the apparatus shown in FIG. First, the press-contacting portion 5 is kept at 50 to 60 by pressing. C, while heating the substrate 4 to

Page 11 Description of the invention (9) 110 ~ 120 ° C, so that the temperature of the upper part u of the base plate is 60 ~ 70. c. Secondly, in the model 3 for a disc-shaped grinding wheel, a half-capacity raw abrasive (fine grain) is uniformly charged to form a lower layer 8. Next, all of the lower layer 8 is covered with a reinforcing material 6 (manufactured by Safety Equipment Co., Ltd., # 43〇〇, thickness 0.8mm, diameter 40mm, color R # 305), and the remaining material is put on it. — After half capacity of the raw abrasive (fine grain), the top surface is smoothed with a roller. Finally, the machine 2 is pressurized with 180 kg for 3 to 4 seconds, and a green grinding wheel is obtained. In addition, the model 3 for a disc-type grinding wheel of a forming apparatus is an article made of nitrided steel using a cavity 9 having a diameter of 305 mm and a depth. For the base plate 4, a 45C-made article was used for 500 minutes. The press 2 uses an article having a curvature of 500 mmR at the joint 5. Finally, a heat treatment is applied to the green grinding wheel to harden the resin to obtain a cutting-shaped colored grinding wheel having a diameter of 405 mm and a flange diameter of 50 mm and a thickness of 3.0 mm. As shown in Figure 2, 'Eight 8 parallel plywood plates 13 (thickness of 0 7mm, straight 420mni, 45C) are arranged with a group of 7 green grinding wheels 14 as a set, and the parallelizing plate 13 and the green grinding wheel 1 in jl 4 is the interactive setting. Stabilizing slabs 2 were interposed between 20 groups of laminations' and heat-treated in a firing furnace. As shown in Figure 3, the heat treatment was performed from 140 to 8 hours. C rose to 160. c, and maintained at 160 ° C for the last 2 hours. In addition, the above-mentioned heat treatment first removes water from the green grinding wheel and melts the resin. Water was removed for 4 hours at 25 ° C and 40RH. Melting of the resin was carried out by applying a pressure of 180 kg for 1 minute at 70 ° C.密 The density of the disc-shaped colored wheel for cutting measured by the following method

5. Description of the invention (10) Degree, hardness and toughness. In addition, the cutting test was performed by the following method. (Measurement method of density (g / cm3)) The weight W of the grinding wheel and the external volume V are measured, and then calculated by the formula of W / V. (Measurement method of hardness (%). When j is cut, X 65mni X 60mm L-shaped angle steel is cut, and the value of% reduction in the diameter of the wheel to be tested determines its hardness. (Strength and toughness (mm) Measurement method) Fix one end of the test piece grinding wheel of 20 0 X X 50mm X 3mm to the end of the machine table (t ab 1 e). Measure at the free end 100mm away from the fixed point and add 5 kg of stress. Distortion (deflection) to determine its strength and toughness. Strength and toughness above 2 mm is strong ", between 1 mm and 2 mm is 11 ordinary 11, and less than 1 _ is " fragile " (cut off) Test method) Cut the 65mm X 65mm X 60mm L-shaped angle steel 10 times with the obtained grinding wheel to measure the cutting speed. The cutting machine uses a product made by the "claw" company. (Durability test method ) Use the obtained grinding wheel to repeatedly cut the standard steel to the edge of its flange, and judge based on the number of cuts when the wheel is exhausted. That is, the number of cuts is "excellent" and the number of cuts is between Between 16 and 24 times, normal n, and the number of cuts less than 16 times are "bad". As shown in Table 1, cut and test density The test results of hardness, hardness, and toughness are shown in Table 2. (Comparative Example 1)

Page 13 V. Description of the invention (11) A black disc-shaped colored grinding wheel for cutting is manufactured to measure its density, hardness and toughness, and a cutting test is performed. The manufacturing of a grinding wheel is performed as follows. First, 100 kg of aluminum oxide powder, 0.3 kg of carbon, and 4.5 kg of water-containing phenol were put into a 1001 coupler. Mix at 25 ± 5 ° C for 3 minutes. Next, the above-obtained mixture, 1.35 kg, 0.7 kg of colorant, 3 kg of iron sulfide, and 3 kg of stone salt were mixed. Put in 1501 blender and mix for 5 minutes at 25 ± 5 ° C. The above mixture was dehumidified and granulated in the same manner as in Example 1 to obtain a raw abrasive. The raw abrasive was obtained in the same manner as in Example 1 to obtain a green grinding wheel. However, 90% of the press's face in the Γ degree odor condition is about 40%. C, the temperature of the disk is about 50 ° C, and the temperature (forming temperature) of the upper surface of the disk is 80 to 90. C. Φ ^ 1 The resin was hardened by applying the same heat treatment as in Example 1 to the green grinding wheel, and the w ^ m ^ a piece was cut to a diameter of 400 mm and a cutting disk having a thickness of 3.0 mm to 190. Γ ,,,, and, the heat treatment is within 6 hours, from 170. C up L down. melt. The water treatment described above first removes water and resin from the raw grinding wheel at 70 ° C. c division is at 25. C, 4 hours at 40 RH. Melting of the resin was also performed under a pressure of 180 kg for 1 minute. The cutting disc type Hundred Barb 々 of the cut-off type obtained by the same method as that of the real # γ 荖 甶 荖 甶, II, to 1 was measured for hardness, toughness and toughness. The same test as in Example 1 was performed.

Page 14 V. Description of the invention (12) The test results of density, hardness, and toughness are shown in Table 1, and the results of the cut-off test are shown in Table 2. (Comparative Example 2) In the same manner as in Comparative Example 1, a black disc-shaped colored grinding wheel for cutting was manufactured. The density, hardness, and toughness were measured in the same manner as in Example 1. The cutting test was performed in the same manner as in Example 1. The test results of density, hardness, and toughness are shown in Table 1, and the results of the cutting test are shown in Table 2. [Table 1] Example 1 it Comparative Example 1 Comparative Example 2 Density 2.5 2.3 2.3 (g / cm3) Good hardness Good Good (° / 〇) Toughness Toughness Fragile (mm) Color Red Black Black [Table 2] Implementation Example 1 Comparative example 1 Comparative example 2 Cutting speed 18 23 21 (seconds) Durability General and common defects From Table 1 and Table 2, it can be seen that the cutting disc-shaped colored grinding wheel of the example has a strong cutting edge and cuts. In terms of speed, etc., they are superior to the cutting disc-shaped colored wheel for the comparative example. In terms of durability, it is at least cut off from the comparative example.

Page 15 V. Description of the invention (13) Use disc-shaped colored grinding wheels of the same grade. In terms of hardness, it was the same grade as the disc-shaped colored wheel for cutting of the comparative example. The disc-shaped colored grinding wheel for cutting manufactured by the method of the present invention can be quickly judged according to the condition of the grinding wheel with different hardness or grain size. Therefore, not only the work efficiency can be improved, but also inventory management can be facilitated. In addition, if the disc-shaped grinding wheel for cutting can be different in color according to the diameter, in the case of abrasion, the diameter before abrasion is easy to distinguish, so it is easy to judge the reduction in abrasion. In addition, because it has sufficient toughness and durability, it will not cause abrasive particles to fall during use. In addition, it has appropriate hardness, good blade contact and good sharpness, and the grinding wheel does not bend. In addition, since the density is relatively high, it is not necessary to separately indicate the hardness of the work material.

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Claims (1)

S7 ^ i57 6. Scope of patent application '~ ------ 1.—A kind of cutting disc-shaped colored grinding wheel type resin is dispersed in the matrix. This cutting method makes the abrasive particles in the method including: The raw plate grinding wheel manufacturing process of the disc type color wheel is made of raw abrasives with a forming temperature of 6η ~ 7ί1〇Γ_ Α, semi-hot-formed to a circle center of 6, 0 and 70 C, and contains pigments 145 heat = pass, so that Green grinding wheel from 135 in 8 to 10 hours. 155. C. Juice to 155 C ~ 165. C, and maintained at 155 c to 165 c for the last 2 to 4 hours to harden the phenol-based resin; 隹 It is characterized in that: the raw abrasive contains 0.000% by weight of magnesium oxide. The disc type colored sand # 忐 for cutting according to item 1 of the patent scope of 2 to 11 of the wheel, wherein the forming temperature is controlled to 60 to 70 by maintaining the semi-thermoformed base plate at 110 to 120 ° C. . c. ΪI of the grinding wheel 3; The cutting disc type coloring W ', as described in item 1 or 2 of ΪLiΪ, in which the raw abrasive contains 0.2 to 0.6% by weight of iron oxide. The scope of the patent application is based on the scope of the patent application. It is characterized by: its hardness 4. It is manufactured by the method described in item 1 of a disc-shaped colored grinding wheel for cutting. 5. A circle for cutting Plate type colored grinding wheel manufactured by the method described in item 2. 6. A cutting plate type colored grinding wheel manufactured by the method described in item 3. 7. ·, a kind of cutting plate type colored sand is 5 ~ 20%, strength and toughness is 4_. $ Π pages