Water tank type tool bit for modular cylindrical wheel and preparation method of water tank type tool bit

Abstract

The invention discloses a water tank type tool bit for a modular cylindrical wheel and a preparation method of the water tank type tool bit. The water tank type tool bit is detachably assembled on the outer surface of a cylindrical wheel base, and a plurality of water tanks are integrally formed in the machining face of the water tank type tool bit; the water tank type tool bit is prepared from, by weight, 35-45 parts of nano iron-nickel-cobalt alloy powder, 25-35 parts of iron-copper-tin alloy powder, 8-15 parts of tin bronze powder, 6-10 parts of superfine tungsten carbide powder, 3-7 parts of superfine activated zinc oxide and 3-6 parts of diamond through a continuous hot pressing sintering technology. Therefore, by using the alloy powder, the method is more suitable for a continuous hot pressing sintering process, high in sintering activity, improved in product performance and low in cost; by adding the tin bronze powder, the alloy bonding phase between the tin bronze powder and the iron-copper-tin alloy powder is higher, the fixed thickness processing effect of the product is improved, and the service life is prolonged; and by adding superfine tungsten carbide powder and superfine activated zinc oxide, the overall red hardness of the product can be improved, and the fixed-thickness large-feed fixed-thickness machining requirements of the water tank type tool bit are met.

Description

Technical Field

[0001] The invention relates to the technical field of thickness calibrating processing tools, and in particular to a water groove type cutter head for a modular cylindrical wheel and a preparation method thereof. Background Art

[0002] There are two types of cylindrical wheels: diamond cylindrical wheels and stone cylindrical wheels. Stone cylindrical wheels are often used in architectural decoration, sculpture and other fields. They are used for grinding, polishing, and thickness determination and scraping of relatively soft materials such as rock slabs and stones.

[0003] The cutter head of the cylindrical wheel currently launched on the market is usually designed as a ring-shaped structure, and the entire ring-shaped cutter head is sleeved on the cylindrical wheel base during installation. For example, the Chinese invention patent with publication number CN220806949U and patent name "A combined adjustable cylindrical thickness-setting wheel" discloses a cylindrical wheel base and a cutter ring, on which a number of cutter heads are evenly spaced, and a number of cutter rings are installed on the cylindrical wheel base in a stacked manner, and the back cutter ring is held against the back cutter ring, and a pressure ring is installed on the cylindrical wheel base, and the pressure ring is locked on the cylindrical wheel base with screws, and after the pressure ring is locked and fixed with the cylindrical wheel base, it is pressed on the front of the front cutter ring, and the cutter rings are pressed against each other in cooperation with the back cutter ring, so as to achieve the position fixation of the cutter rings and form a cylindrical thickness-setting wheel.

[0004] In the prior art, the above-mentioned annular structure cutter head is usually produced by hot pressing and sintering. Hot pressing and sintering uses large current heating, and heating and pressurization are carried out simultaneously. The powder is in a thermoplastic state, which is conducive to the contact diffusion and flow mass transfer process of the particles, so the hot pressing and sintering time is relatively short.

[0005] However, the prior art still has the following defects:

[0006] 1. The annular cutter head of the existing cylindrical wheel is usually composed of single precious metals such as copper powder, tin powder, and cobalt powder due to the process requirements of hot pressing sintering. Therefore, the component formula cost is relatively high. The sintering activity of the single precious metal is not high enough during the sintering process, and the metal bonding phase is not high enough. For low-melting-point metals, metal loss is prone to occur, and the hardness of the sintered cutter head is insufficient.

[0007] 2. In the hot pressing sintering method of the prior art, since the sintering zone and the product loading and unloading zone in the hot pressing sintering equipment are in the same area, after sintering, it is necessary to cool down and shut down before the next batch of sintering, and then the sintered products are unloaded and the next batch of products are loaded, which will lead to the inability to carry out continuous hot pressing sintering, and the temperature of the sintering zone will also be lost quickly, and the heat transfer and heat control during the sintering process are not ideal; each sintering is only carried out for 10 minutes. Although the sintering time is short, in order to make the temperature rise as quickly as possible during sintering, the current needs to be instantly increased to the maximum, and at the end of sintering, the current is instantly reduced to 0. This hot pressing sintering with frequent sudden increases and decreases in current will consume a lot of electricity;

[0008] At the same time, due to the short sintering time, the degree of sintering alloy is low, the metal matrix has insufficient holding force on the diamond, and the sharpness and service life of the sintered cylindrical wheel cutter head cannot meet the performance requirements of the product. Summary of the invention

[0009] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a water groove type cutter head for a modular cylindrical wheel.

[0010] One of the purposes of the present invention is achieved by the following technical solution: a water groove type cutter head for a modular cylindrical wheel, wherein the water groove type cutter head can be detachably assembled on the outer surface of the cylindrical wheel base, and a plurality of water grooves are integrally formed on the processing surface of the water groove type cutter head; the water groove type cutter head is prepared by a continuous hot pressing and sintering process from the following components in parts by weight: 35-45 parts of nano iron-nickel-cobalt alloy powder, 25-35 parts of iron-copper-tin alloy powder, 8-15 parts of tin bronze powder, 6-10 parts of ultrafine tungsten carbide powder, 3-7 parts of ultrafine active zinc oxide and 3-6 parts of diamond.

[0011] Furthermore, the nano iron-nickel-cobalt alloy powder is 35-45 parts, the iron-copper-tin alloy powder is 25-35 parts, the tin bronze powder is 8-15 parts, the ultrafine tungsten carbide powder is 6-10 parts, the ultrafine active zinc oxide is 3-7 parts and the diamond is 3-6 parts.

[0012] Furthermore, the particle size of the nano iron-nickel-cobalt alloy powder is 1500-2500 mesh, the particle size of the iron-copper-tin alloy powder is 350-450 mesh, the particle size of the tin-bronze powder is 250-350 mesh, the particle size of the ultrafine tungsten carbide powder is 2600-3300 mesh, and the particle size of the ultrafine active zinc oxide is 2500-3500 mesh.

[0013] Furthermore, the particle size of the nano iron-nickel-cobalt alloy powder is 2000 mesh, the particle size of the iron-copper-tin alloy powder is 400 mesh, the particle size of the tin-bronze powder is 300 mesh, the particle size of the ultrafine tungsten carbide powder is 3000 mesh, and the particle size of the ultrafine active zinc oxide is 3000 mesh.

[0014] In order to overcome the deficiencies of the prior art, a second object of the present invention is to provide a method for preparing a water groove type cutter head for a modular cylindrical wheel.

[0015] The second object of the present invention is achieved by adopting the following technical solution: a method for preparing a water-grooved cutter head for a modular cylindrical wheel, comprising the following steps:

[0016] S1. Mix the raw powders according to the set ratio, put the prepared raw powders into the mixer, and mix them for 2-3 hours to ensure that the raw powders are fully mixed;

[0017] S2, weighing the original powder mixed in step S1 according to the set unit weight to form a powder to be cold pressed;

[0018] S3, putting the cold pressed powder formed in step S2 into a cold pressing mold, and cold pressing the cold pressed powder at a pressure of 200-300KN to form a water trough type cutter head;

[0019] S4, placing the cold-pressed water trough type cutter head in step S3 into a continuous hot pressing and sintering device, wherein the continuous hot pressing and sintering device is provided with a sintering zone, an upper and lower machine zone, and the sintering zone and the upper and lower machine zones are independently separated and arranged. The water trough type cutter head is placed in the sintering zone and continuously hot pressed and sintered at a temperature of 800-900° C. for a holding time of 2-3 hours;

[0020] S5, assembling the plurality of water-trough type cutter heads fired in step S4 in a one-to-one correspondence with the plurality of slots on the outer surface of the cylindrical wheel base, and aligning the water-trough type cutter heads with both ends of the slots, thereby forming a modular cylindrical wheel.

[0021] Furthermore, the machining surface of the cutter head of the set shape in step S2 is integrally cold-pressed to form a plurality of water grooves.

[0022] Furthermore, the cold pressing pressure is 250 KN, the sintering temperature is 830° C., and the holding time is 2.5 hours.

[0023] Furthermore, the components in step S1 are respectively calculated by mass as follows: 35-45 parts of nano iron-nickel-cobalt alloy powder, 25-35 parts of iron-copper-tin alloy powder, 8-15 parts of tin bronze powder, 6-10 parts of ultrafine tungsten carbide powder, 3-7 parts of ultrafine active zinc oxide and 3-6 parts of diamond.

[0024] Furthermore, the components in step S1 are respectively calculated by mass as follows: 38 parts of nano iron-nickel-cobalt alloy powder, 28 parts of iron-copper-tin alloy powder, 14 parts of tin bronze powder, 9 parts of ultrafine tungsten carbide powder, 6 parts of ultrafine active zinc oxide and 5 parts of diamond.

[0025] Furthermore, the particle size of the nano iron-nickel-cobalt alloy powder is 1500-2500 mesh, the particle size of the iron-copper-tin alloy powder is 350-450 mesh, the particle size of the tin-bronze powder is 250-350 mesh, the particle size of the ultrafine tungsten carbide powder is 2600-3300 mesh, and the particle size of the ultrafine active zinc oxide is 2500-3500 mesh.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The water-grooved cutter head of the modular cylindrical wheel of the present invention uses alloy powders such as nano iron-nickel-cobalt alloy powder and iron-copper-tin alloy powder as the main formula components. By adjusting the formula and using alloy powder, it is more suitable for continuous hot pressing sintering process, has high sintering activity, improves product performance, and has lower cost than the use of single precious metals in the past;

[0028] By adding tin bronze powder, the alloy bonding phase between the powder and the iron-copper-tin alloy powder is higher, which inhibits the loss of metal volatilization, oxidation and impurity absorption during sintering, and the degree of sintering alloying is high, which improves the product thickness processing effect and extends the service life; by adding ultrafine tungsten carbide powder and ultrafine active zinc oxide, the overall red hardness of the product can be improved, which is suitable for the thickness processing needs of sink-type cutter heads with large feed thickness processing, and the power consumption in the grinding and polishing process is relatively low.

[0029] (2) Combined with the formula of the water-trough cutter head of the modular cylindrical wheel, the water-trough cutter head is processed by continuous hot pressing and sintering and applied to thickness determination processing, which is a first in the ceramic processing industry. Compared with the previous hot pressing and sintering process that requires cooling and stopping, the sintering zone and the upper and lower machine zones of the continuous sintering equipment of the embodiment of the present application are independently separated and arranged. When the product is loaded and unloaded, the sintering zone will not cause heat loss, so the sintering zone only needs a small amount of electricity to maintain heat, and there is no need to stop the machine to load and unload the product;

[0030] Therefore, by using the continuous hot pressing sintering process to sinter the optimized cutter head formula composition, the production efficiency of the same unit can be increased by at least 150%, and the continuous hot pressing sintering of each batch of cylindrical wheels per hour can save at least 3 kWh of electricity; the sintering time of the continuous hot pressing sintering process is at least 2.5 hours, the sintering alloy degree of the optimized alloy powder is high, the heat energy loss is small, the working environment is improved, the labor intensity is reduced, the heat transfer during the sintering process is reliable, and the metal matrix’s grip on the diamond is improved, the sharpness of the sink-type cutter head is improved, and the service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A physical diagram of a modular cylindrical wheel in a preferred embodiment of the present invention;

[0032] Figure 2 A three-dimensional diagram of a modular cylindrical wheel with a water groove type cutter head in a preferred embodiment of the present invention.

[0033] In the figure:

[0034] 10. Cylindrical wheel base;

[0035] 20. Sink-type cutter head; 201. Sink. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0037] like Figure 1-2 As shown, a water groove type cutter head for modular cylindrical wheels is commonly used in the fields of architectural decoration, sculpture, etc., and is used for cutting, grinding, polishing, and thickness determination and flattening of relatively soft materials such as rock slabs and stones. The water groove type cutter head 20 provided in the embodiment of the present application has a plurality of water grooves 201 integrally formed on its processing surface. By providing a plurality of water grooves 201 on the processing surface of the cutter head, the chip removal and cooling effects of the cutter head can be improved.

[0038] When installing the water trough type cutter head 20, each water trough type cutter head 20 can be detachably assembled on the outer surface of the cylindrical wheel base 10. Therefore, by independently assembling each water trough type cutter head 20, the cutter head can be replaced in a targeted manner without disassembling the entire cylindrical wheel, thereby improving the convenience of daily maintenance and reducing the intensity of maintenance work.

[0039] The water trough type cutter head 20 is prepared by a continuous hot pressing and sintering process from the following components in parts by weight: 35-45 parts of nano iron-nickel-cobalt alloy powder, 25-35 parts of iron-copper-tin alloy powder, 8-15 parts of tin bronze powder, 6-10 parts of ultrafine tungsten carbide powder, 3-7 parts of ultrafine active zinc oxide and 3-6 parts of diamond.

[0040] The formula principle of the water-grooved cutter head 20 of the modular cylindrical wheel of the present invention is as follows:

[0041] The nano iron-nickel-cobalt alloy powder and iron-copper-tin alloy powder selected by the present invention have the characteristics of high sintering activity and can reduce the requirements for sintering temperature. Adding a certain amount of the above nano alloy powder and coordinating the sufficient sintering time of the continuous hot pressing sintering process is beneficial to improving the bonding phase between metals during the sintering process, inhibiting the loss of metal volatilization, oxidation and impurity absorption during sintering, and having a high degree of sintering alloying. In addition, the selected alloy powder can replace the single precious metals such as iron powder, copper powder, tin powder, etc. in the traditional formula, which can not only improve product performance but also reduce material costs.

[0042] In addition, by adding tin bronze powder, it can replace the single tin powder, further improving the alloy bonding phase between the iron-copper-tin alloy powder. And by adding ultrafine tungsten carbide powder and ultrafine active zinc oxide, the overall red hardness of the product (the hardness that can be maintained after sintering for a certain time and at a certain temperature) can be improved, thereby ensuring that the product does not deform, and is suitable for the fixed thickness large feed fixed thickness processing requirements of the water tank type cutter head 20.

[0043] As a further embodiment, the nano iron-nickel-cobalt alloy powder is 35-45 parts, the iron-copper-tin alloy powder is 25-35 parts, the tin bronze powder is 8-15 parts, the ultrafine tungsten carbide powder is 6-10 parts, the ultrafine active zinc oxide is 3-7 parts and the diamond is 3-6 parts.

[0044] As a further embodiment, the particle size of the nano iron-nickel-cobalt alloy powder is 1500-2500 mesh, the particle size of the iron-copper-tin alloy powder is 350-450 mesh, the particle size of the tin-bronze powder is 250-350 mesh, the particle size of the ultrafine tungsten carbide powder is 2600-3300 mesh, and the particle size of the ultrafine active zinc oxide is 2500-3500 mesh.

[0045] As a further embodiment, the particle size of the nano iron-nickel-cobalt alloy powder is 2000 mesh, the particle size of the iron-copper-tin alloy powder is 400 mesh, the particle size of the tin-bronze powder is 300 mesh, the particle size of the ultrafine tungsten carbide powder is 3000 mesh, and the particle size of the ultrafine active zinc oxide is 3000 mesh.

[0046] Therefore, the present invention optimizes the above-mentioned cutter head formula components, adopts nano iron-nickel-cobalt alloy powder, iron-copper-tin alloy powder and other alloy powders as the main formula components, and adjusts the formula to use alloy powder, which is more suitable for continuous hot pressing sintering process, has high sintering activity, improves product performance, and has lower cost than the previous use of single precious metals; by adding tin bronze powder, the alloy bonding phase between the iron-copper-tin alloy powder is higher, which inhibits the loss of metal volatilization, oxidation and impurity absorption during sintering, and the degree of sintering alloying is high, which improves the product thickness processing effect and extends the service life; by adding ultrafine tungsten carbide powder and ultrafine active zinc oxide, the overall red hardness of the product can be improved, which is suitable for the thickness fixing and large feed thickness fixing processing requirements of the water tank type cutter head 20, and the power consumption in the grinding and polishing process is relatively low.

[0047] The second object of the present invention is achieved by adopting the following technical solution: a method for preparing a water-grooved cutter head for a modular cylindrical wheel, comprising the following steps:

[0048] S1. Mix the raw powders according to the set ratio, put the prepared raw powders into the mixer, and mix them for 2-3 hours to ensure that the raw powders are fully mixed;

[0049] S2, weighing the original powder mixed in step S1 according to the set unit weight to form a portion of powder to be cold pressed;

[0050] S3, putting the cold pressed powder formed in step S2 into a cold pressing mold, and cold pressing the cold pressed powder at a pressure of 200-300KN to form a water groove type cutter head 20; specifically, a plurality of water grooves 201 are integrally cold pressed on the processing surface of the cutter head; preferably, the cold pressing pressure is set to 250KN;

[0051] S4, put the cold-pressed water trough cutter head 20 in step S3 into the continuous hot pressing and sintering equipment for continuous hot pressing and sintering at a temperature of 800-900℃; preferably, the sintering temperature is set to 830℃, and the holding time is 2-3 hours; the continuous hot pressing and sintering equipment used in the embodiment of the present application has a gate that independently separates the sintering area from the upper and lower machine areas, and the product to be sintered is placed on the mold in the upper machine area. The product to be sintered can pass through the upper machine area, the sintering area and the lower machine area in sequence through a conveyor belt, and finally come out of the lower machine area. The heat of the sintering area will not be affected during the process of loading the product to be sintered and unloading the sintered product, so only a small amount of electricity is needed to maintain the heat of the sintering area.

[0052] S5, assembling the plurality of water-trough type cutter heads 20 fired in step S4 in a one-to-one correspondence with the plurality of slots on the outer surface of the cylindrical wheel base 10, and aligning the water-trough type cutter heads 20 with both ends of the slots, thereby forming a modular cylindrical wheel.

[0053] As a further embodiment, the components in step S1 are respectively as follows by mass: 35-45 parts of nano iron-nickel-cobalt alloy powder, 25-35 parts of iron-copper-tin alloy powder, 8-15 parts of tin bronze powder, 6-10 parts of ultrafine tungsten carbide powder, 3-7 parts of ultrafine active zinc oxide and 3-6 parts of diamond. Preferably, the particle size of the nano iron-nickel-cobalt alloy powder is 1500-2500 mesh, the particle size of the iron-copper-tin alloy powder is 350-450 mesh, the particle size of the tin bronze powder is 250-350 mesh, the particle size of the ultrafine tungsten carbide powder is 2600-3300 mesh, and the particle size of the ultrafine active zinc oxide is 2500-3500 mesh.

[0054] As a further embodiment, the components in step S1 are respectively 38 parts by mass of nano iron-nickel-cobalt alloy powder, 28 parts of iron-copper-tin alloy powder, 14 parts of tin bronze powder, 9 parts of ultrafine tungsten carbide powder, 6 parts of ultrafine active zinc oxide and 5 parts of diamond. Preferably, the particle size of the nano iron-nickel-cobalt alloy powder is 2000 mesh, the particle size of the iron-copper-tin alloy powder is 400 mesh, the particle size of the tin bronze powder is 300 mesh, the particle size of the ultrafine tungsten carbide powder is 3000 mesh, and the particle size of the ultrafine active zinc oxide is 3000 mesh.

[0055] Therefore, combined with the formula of the above-mentioned modular cylindrical wheel water groove type cutter head 20, the present invention adopts continuous hot pressing and sintering to process the water groove type cutter head 20 and applies it to thickness determination processing, which is a first in the ceramic processing industry. Compared with the previous hot pressing and sintering process with cooling and shutdown, the sintering zone and the upper and lower machine zones of the continuous sintering equipment in the embodiment of the present application are independently set. When the product is loaded and unloaded, the sintering zone will not cause heat loss, so the sintering zone only needs a small amount of electricity to maintain heat, and there is no need to shut down for loading and unloading of products.

[0056] Therefore, by using a continuous hot pressing sintering process to sinter the optimized cutter head formula composition, the same unit production efficiency can be increased by at least 150%, and continuous hot pressing sintering of each batch of cylindrical wheels per hour can save at least 3 kWh of electricity; the sintering time of the continuous hot pressing sintering process is at least 2.5 hours, the sintering alloy degree of the optimized alloy powder is high, the heat energy loss is small, the working environment is improved, the labor intensity is reduced, the heat transfer during the sintering process is reliable, and the metal matrix's holding force on the diamond is improved, the water tank is improved to make the cutter head 20 sharper and the service life extended.

[0057] The following are specific embodiments of the present invention. Unless otherwise specified, the raw materials, equipment, etc. used in the following embodiments can be obtained by purchase.

[0058] The raw materials of Examples 1-3 and Comparative Examples 1-4 were weighed according to the matching in Table 1, and were manufactured according to the preparation method in Table 1, and the water-grooved cutter heads 20 of modular cylindrical wheels of different embodiments were obtained. See Table 1 for details:

[0059] Table 1 is a table of raw material ratios for Examples 1-3 and Comparative Examples 1-4

[0060]

[0061]

[0062] The nano-iron-nickel-cobalt alloy powder in Table 1 was purchased from Hunan Fulong New Materials Co., Ltd., which is an atomized iron-nickel-cobalt alloy powder with a particle size of 2000 mesh and a brand name of HWD30;

[0063] Iron-copper-tin alloy powder was purchased from Henan Taihe Huijin Powder Technology Co., Ltd., with a mesh size of 400 mesh;

[0064] Tin bronze powder was purchased from Jiangsu Mengda New Material Technology Co., Ltd., with a mesh size of 300 mesh;

[0065] Ultrafine tungsten carbide powder was purchased from Jiangsu Mengda New Material Technology Co., Ltd., with a mesh size of 3000 mesh;

[0066] Ultrafine active zinc oxide was purchased from Jiangsu Mengda New Material Technology Co., Ltd., with a mesh size of 3000 mesh;

[0067] Diamond was purchased from Henan Huanghe Cyclone Co., Ltd.

[0068] The method for preparing the water-grooved cutter head 20 of the modular cylindrical wheel of Examples 1-3 and Comparative Examples 1-4 comprises the following steps:

[0069] S1, mixing the raw powders of nano iron-nickel-cobalt alloy powder, iron-copper-tin alloy powder, tin bronze powder, ultrafine tungsten carbide powder, ultrafine active zinc oxide and diamond according to the set ratio, putting the prepared raw powders into a mixer, and mixing for 2.5 hours to make the raw powders fully mixed;

[0070] S2, weighing the original powder mixed in step S1 according to the set unit weight to form a portion of powder to be cold pressed;

[0071] S3, putting the cold pressed powder formed in step S2 into a cold pressing mold, and cold pressing the cold pressed powder at a pressure of 200-300KN to form a water trough type cutter head 20;

[0072] S4, placing the cold-pressed water trough type cutter head in step S3 into a continuous hot pressing and sintering device, wherein the continuous hot pressing and sintering device is provided with a sintering zone, an upper and lower machine zone, and the sintering zone and the upper and lower machine zones are independently separated and arranged. The water trough type cutter head is placed in the sintering zone and continuously hot pressed and sintered at a temperature of 800-900° C. for a holding time of 2-3 hours;

[0073] S5, assembling the plurality of water-trough type cutter heads 20 fired in step S4 in a one-to-one correspondence with the plurality of slots on the outer surface of the cylindrical wheel base 10, and aligning the water-trough type cutter heads 20 with both ends of the slots, thereby forming a modular cylindrical wheel.

[0074] Comparative Example 5

[0075] The annular cutter head of the existing cylindrical wheel is prepared from the following components in parts by weight: 20 parts of copper powder, 30 parts of cobalt powder, 40 parts of iron-copper alloy powder and 10 parts of tin powder.

[0076] Copper powder comes from Jiangsu Mengda New Material Technology Co., Ltd.; the mesh size is 500 mesh;

[0077] Cobalt powder comes from Hunan Fulong New Materials Co., Ltd.; the mesh size is 500 mesh;

[0078] The iron-copper alloy powder comes from Henan Taihe Huijin Powder Technology Co., Ltd.; the mesh size is 400 mesh;

[0079] Tin powder comes from Jiangsu Mengda New Material Technology Co., Ltd.; the mesh size is 400 mesh;

[0080] The formula of the annular cutter head of the existing cylindrical wheel is prepared by a traditional hot pressing sintering process, which includes the following steps:

[0081] 1) Mixing the original powders according to the proportion, weighing the mixed original powders to form cold-pressed powders, putting the cold-pressed powders into a cold-pressing mold, and cold-pressing them into a plurality of single blade heads;

[0082] 2) The single cutter head is placed on the mold and hot-pressed and sintered by a conventional hot press at a pressure of 115KN. The sintering temperature is 680°C and the holding time is 10 minutes. The conventional hot press heats the upper electrode plate and the lower electrode plate with a large current, and then places the assembled mold between the upper electrode plate and the lower electrode plate, heats them with electricity and continues to pressurize them. After the hot-pressing and sintering is completed, the power will be turned off and the product will be taken out before the next batch of hot-pressing and sintering is carried out.

[0083] 3) The sintering temperature is reduced to 0, the hot press is stopped, the single cutter head sintered in step 2 is cooled off the machine, and the mold is removed to take out the single cutter head;

[0084] 4) After cooling down from the machine, several single blade heads are welded and processed into annular blade heads.

[0085] Comparative Example 6

[0086] Compared with Example 2, the difference of Comparative Example 6 is that the cold pressing pressure in step S3 of the preparation process is less than 200 KN, and the remaining formula composition and process conditions are consistent with Example 2. The adjustment of the process parameters is specifically shown in Table 2.

[0087] Comparative Example 7

[0088] Compared with Example 2, the difference of Comparative Example 7 is that the cold pressing pressure in step S3 of the preparation process is greater than 300 KN, and the remaining formula composition and process conditions are consistent with Example 2. The adjustment of the process parameters is specifically shown in Table 2.

[0089] Comparative Example 8

[0090] Compared with Example 2, the difference of Comparative Example 8 is that the temperature of the continuous hot pressing sintering equipment in step S4 of the preparation process is less than 700° C., and the remaining formulation composition and process conditions are consistent with Example 2. The adjustment of the process parameters is specifically shown in Table 2.

[0091] Comparative Example 9

[0092] Compared with Example 2, the difference of Comparative Example 9 is that the temperature of the continuous hot pressing sintering equipment in step S4 of the preparation process is greater than 900° C., and the remaining formulation composition and process conditions are consistent with Example 2. The adjustment of the process parameters is specifically shown in Table 2.

[0093] Table 2 is a comparison table of process parameters of Example 2 and Comparative Examples 6-9

[0094]

[0095]

[0096] 1. Effect evaluation and performance testing

[0097] The test modular cylindrical wheel water-trough type cutter head 20 was made into a mold using the water-trough type cutter head 20 formula of the best embodiment 2 and comparative examples 1-9, and its density, bending strength and impact strength were tested. The test items and results are shown in Table 3-4.

[0098] (1) Density test method

[0099] The density was determined in accordance with GB / T 3850-2015 and the results were recorded in %.

[0100] (2) Flexural strength test method

[0101] According to GB / T 232-2010, the bending strength was tested using a universal electronic testing machine (Zhuhai Sansi Testing Technology Co., Ltd.), and the results were recorded in N.

[0102] (3) Impact strength test method

[0103] The impact strength was tested according to the specific provisions of the national standard GB / T 229-2020, and the flexural strength was tested using a universal electronic testing machine (Zhuhai Sansi Testing Technology Co., Ltd.), and the results were recorded in J / cm2.

[0104] Table 3 is the performance test data of the modular cylindrical wheel water groove type cutter head 20 in each embodiment

[0105]

[0106]

[0107] As shown in the above table, under the continuous hot pressing sintering process conditions of the present invention, the density, bending strength and impact strength of the modular cylindrical wheel water groove type cutter head 20 of Example 2 are greatly improved compared with the existing traditional formula by adopting the formula of the present invention; it illustrates that the formula of the present invention is applied in the field of manufacturing cylindrical wheel water groove type cutter heads 20, which can well improve the sintering activity, improve product performance, inhibit the loss of metal volatilization, oxidation and impurity absorption during sintering, and has a high degree of sintering alloy, thereby improving the product thickness processing effect and extending the service life; by adding ultrafine tungsten carbide powder and ultrafine active zinc oxide, the overall red hardness of the product can be improved, which is suitable for the thickness fixing and large feed thickness fixing processing needs of the water groove type cutter head 20.

[0108] Compared with Example 2, the difference in Comparative Example 1 is that the proportion of nano-iron-nickel-cobalt alloy powder is reduced, which has an impact on its density, bending strength and impact strength performance;

[0109] Compared with Example 2, the difference in Comparative Example 2 is that the proportion of nano-iron-nickel-cobalt alloy powder is increased, which has an impact on its density, bending strength and impact strength performance;

[0110] Compared with Example 2, the difference in Comparative Example 3 is that the proportion of the iron-copper-tin alloy powder is reduced, which has an impact on its density, bending strength and impact strength performance;

[0111] Compared with Example 2, the difference in Comparative Example 4 is that the proportion of the iron-copper-tin alloy powder is increased, which has an impact on its density, bending strength and impact strength performance;

[0112] Compared with Example 2, Comparative Example 5 adopts a conventional formulation system and hot pressing sintering process, which affects its density, flexural strength and impact strength performance.

[0113] Compared with Example 2, the difference in Comparative Example 6 is that the cold pressing pressure is reduced, which has an impact on its density, bending strength and impact strength performance;

[0114] Compared with Example 2, the difference in Comparative Example 7 is that the cold pressing pressure is increased, which has an impact on its density, bending strength and impact strength performance;

[0115] Compared with Example 2, the difference in Comparative Example 8 is that the hot pressing temperature is lowered, which has an impact on its density, bending strength and impact strength performance;

[0116] Compared with Example 2, the difference in Comparative Example 9 is that the hot pressing temperature is increased, which affects its density, bending strength and impact strength properties.

[0117] 2. On-site water tank type cutter head 20 thickness processing test

[0118] On-site working conditions: 800×800×20mm ceramic tile blank, thickness processing size 2.3mm, speed 40 pieces / min, i.e. 32 meters / min. The test items include energy consumption, service life, and thickness processing efficiency. The current refers to the current value measured under the normal working condition of the cylindrical wheel. The service life refers to the maximum time limit of continuous use of the cutter head.

[0119] The test results are as follows:

[0120] Table 4 is the test data of the use status of the modular cylindrical wheel water groove type cutter head 20 in each embodiment

[0121]

[0122] As shown in the above table, compared with the traditional hot pressing and sintering process and the traditional formula, the present invention adopts a continuous hot pressing and sintering process to sinter the formula product of the present invention. The energy consumption reduction capability, service life and thickness processing efficiency of the modular cylindrical wheel water slot type cutter head 20 of Example 2 are greatly improved; it shows that the continuous hot pressing and sintering process is applied in the field of cylindrical wheel water slot type cutter head 20 production, which can greatly improve the production efficiency, reduce energy consumption during the continuous hot pressing and sintering and product grinding and polishing processes, improve the working environment, reduce labor intensity, and achieve better heat control effect during the sintering process, thereby improving the metal matrix's grip on diamonds, improving the sharpness of the water slot type cutter head 20 and extending its service life.

[0123] Compared with the existing hot pressing and sintering process, the use of continuous hot pressing and sintering to produce the water trough type cutter head 20 and apply it to fixed thickness processing is a first in the ceramic processing industry. Compared with the previous hot pressing and sintering process with cooling and shutdown, the sintering zone and the upper and lower machine areas of the continuous sintering equipment in the embodiment of the present application are independently set. When the product is loaded and unloaded, there will be no heat loss in the sintering zone, so the sintering zone only needs a small amount of electricity to maintain heat, and there is no need to shut down for loading and unloading of products.

[0124] Therefore, by using the continuous hot pressing and sintering process to sinter the optimized tool head formula composition, and subsequently using the cylindrical wheel to perform product grinding and polishing, the embodiment of the present application uses the continuous hot pressing and sintering process to sinter 5 molds per hour, while the traditional hot pressing and sintering process can sinter 3 molds per hour. After conversion, the continuous hot pressing and sintering process provided by the embodiment of the present application is at least 150% higher than the traditional hot pressing process in the same unit production efficiency.

[0125] Moreover, it is calculated that each batch of cylindrical wheels produced by continuous hot pressing and sintering of the present invention formula can save at least 3 kWh of electricity per hour. Cylindrical wheels produced by the present invention and formula are usually equipped with 36 cylindrical wheel grinding heads on a polishing line, which saves 2 kWh of electricity compared with the traditional grinding and polishing energy consumption of each cylindrical wheel grinding head, that is, each polishing line can save 1,728 kWh of electricity when working 24 hours a day, and save about 620,000 kWh of electricity per year.

[0126] The sintering time of the continuous hot pressing sintering process is at least 2.5 hours. The optimized alloy powder has a high degree of sintering alloy, less heat energy loss, improved working environment, reduced labor intensity, reliable heat transfer during the sintering process, and thus improves the metal matrix's holding force on diamonds, improves the sharpness of the water tank type cutter head 20 and extends its service life.

[0127] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A water-grooved cutter head for a modular cylindrical wheel, characterized in that: The water trough type cutter head can be detachably assembled on the outer surface of the cylindrical wheel base, and a plurality of water troughs are integrally formed on the processing surface of the water trough type cutter head; the water trough type cutter head is prepared by a continuous hot pressing and sintering process from the following components in parts by weight: 35-45 parts of nano iron-nickel-cobalt alloy powder, 25-35 parts of iron-copper-tin alloy powder, 8-15 parts of tin bronze powder, 6-10 parts of ultrafine tungsten carbide powder, 3-7 parts of ultrafine active zinc oxide and 3-6 parts of diamond.

2. The water groove cutter head for modular cylindrical wheels according to claim 1, characterized in that: The nano iron-nickel-cobalt alloy powder is 35-45 parts, the iron-copper-tin alloy powder is 25-35 parts, the tin bronze powder is 8-15 parts, the ultrafine tungsten carbide powder is 6-10 parts, the ultrafine active zinc oxide is 3-7 parts and the diamond is 3-6 parts.

3. The water groove cutter head for modular cylindrical wheels according to claim 1, characterized in that: The particle size of the nano iron-nickel-cobalt alloy powder is 1500-2500 mesh, the particle size of the iron-copper-tin alloy powder is 350-450 mesh, the particle size of the tin-bronze powder is 250-350 mesh, the particle size of the ultrafine tungsten carbide powder is 2600-3300 mesh, and the particle size of the ultrafine active zinc oxide is 2500-3500 mesh.

4. The water groove cutter head for modular cylindrical wheels according to claim 3, characterized in that: The particle size of the nano iron-nickel-cobalt alloy powder is 2000 mesh, the particle size of the iron-copper-tin alloy powder is 400 mesh, the particle size of the tin-bronze powder is 300 mesh, the particle size of the ultrafine tungsten carbide powder is 3000 mesh, and the particle size of the ultrafine active zinc oxide is 3000 mesh.

5. A method for preparing a water-grooved cutter head for a modular cylindrical wheel, characterized in that: The following steps are involved: S1. Mix the raw powders according to the set ratio, put the prepared raw powders into the mixer, and mix them for 2-3 hours to ensure that the raw powders are fully mixed; S2, weighing the original powder mixed in step S1 according to the set unit weight to form a powder to be cold pressed; S3, putting the cold pressed powder formed in step S2 into a cold pressing mold, and cold pressing the cold pressed powder at a pressure of 200-300KN to form a water trough type cutter head; S4, placing the cold-pressed water trough type cutter head in step S3 into a continuous hot pressing and sintering device, wherein the continuous hot pressing and sintering device is provided with a sintering zone, an upper and lower machine zone, and the sintering zone and the upper and lower machine zones are independently separated and arranged. The water trough type cutter head is placed in the sintering zone and continuously hot pressed and sintered at a temperature of 800-900° C. for a holding time of 2-3 hours; S5, assembling the plurality of water-trough type cutter heads fired in step S4 in a one-to-one correspondence with the plurality of slots on the outer surface of the cylindrical wheel base, and aligning the water-trough type cutter heads with both ends of the slots, thereby forming a modular cylindrical wheel.

6. The method for preparing a water groove type cutter head for a modular cylindrical wheel according to claim 5, characterized in that: In step S2, the processing surface of the cutter head with the set shape is integrally cold-pressed to form a plurality of water grooves.

7. The method for preparing a water-grooved cutter head for a modular cylindrical wheel according to claim 5, characterized in that: The cold pressing pressure is 250KN, the sintering temperature is 830℃, and the holding time is 2.5 hours.

8. The method for preparing a water-grooved cutter head for a modular cylindrical wheel according to any one of claims 5 to 7, characterized in that: The components in step S1 are respectively as follows by mass: 35-45 parts of nano iron-nickel-cobalt alloy powder, 25-35 parts of iron-copper-tin alloy powder, 8-15 parts of tin bronze powder, 6-10 parts of ultrafine tungsten carbide powder, 3-7 parts of ultrafine active zinc oxide and 3-6 parts of diamond.

9. The method for preparing a water-grooved cutter head for a modular cylindrical wheel according to any one of claims 5 to 7, characterized in that: The components in step S1 are respectively as follows by mass: 38 parts of nano iron-nickel-cobalt alloy powder, 28 parts of iron-copper-tin alloy powder, 14 parts of tin bronze powder, 9 parts of ultrafine tungsten carbide powder, 6 parts of ultrafine active zinc oxide and 5 parts of diamond.

10. The method for preparing a water groove type cutter head for a modular cylindrical wheel according to claim 8, characterized in that: The particle size of the nano iron-nickel-cobalt alloy powder is 1500-2500 mesh, the particle size of the iron-copper-tin alloy powder is 350-450 mesh, the particle size of the tin-bronze powder is 250-350 mesh, the particle size of the ultrafine tungsten carbide powder is 2600-3300 mesh, and the particle size of the ultrafine active zinc oxide is 2500-3500 mesh.

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