Granite laser welding saw blade and manufacturing method thereof

Abstract

The present invention discloses a granite laser welding saw blade and a manufacturing method thereof, belonging to the field of powder metallurgy technology. The saw blade includes a cutter head and a base body. The cutter head is formed by mixing and sintering metal powder and diamond. The concentration of the diamond is 10%-40% (prepared as 400%), the particle size is 250-500um, and the metal powder, in terms of weight percentage, includes: iron-cobalt-copper pre-alloy powder: 30-40% by weight; copper-tin alloy powder: 15-30% by weight; carbonyl iron powder: 15-25% by weight; ultrafine cobalt powder: 10-20% by weight; nickel powder: 10-15% by weight. The diamond saw blade of the present invention is obtained by batching, mixing, granulation, cold pressing, hot pressing sintering, subsequent treatment, and laser welding. The saw blade provided by the present invention adopts laser welding and is suitable for dry cutting. Compared with similar products, the cutting speed of the saw blade is more than 30% higher than that of peer products and the service life is more than 40% longer.

Description

Technical Field

[0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a granite laser welding saw blade and a manufacturing method thereof. Background Art

[0002] Granite is an igneous rock formed by the consolidation of magma below the Earth's surface. Its main components are feldspar and quartz. Granite is a widely distributed rock, produced in many countries around the world. It is resistant to weathering and has a beautiful color that can last for over a century. Due to its high hardness and wear resistance, it is widely used in high-end architectural decoration projects, lobby floors, and is also the material of choice for outdoor sculpture. However, granite is very difficult to process due to its hard, dense texture, high strength, and wear resistance. The present invention studies the cutting process of granite using a diamond circular saw blade.

[0003] In existing technology, most domestic diamond circular saw blades, especially those used for stone processing, are high-frequency welded. This prevents dry cutting and requires wet cutting with water. Furthermore, the cutting speed gradually slows during the cutting process, eventually becoming difficult to cut, significantly impacting processing efficiency. To address this issue, we provide a laser-welded granite saw blade and its manufacturing method. Summary of the Invention

[0004] The purpose of the present invention is to provide a granite laser welded saw blade and a manufacturing method thereof, which adopts laser welding and is suitable for dry cutting; compared with similar products, the saw blade has a cutting speed more than 30% higher than that of similar products and a service life more than 40% longer.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A granite laser welded saw blade comprises a cutter head and a substrate welded to the cutter head. The cutter head is formed by sintering a mixture of metal powder and diamond. The diamond has a concentration of 10%-40% (based on 400%) and a particle size of 250-500 μm. The metal powder comprises, by weight percentage, the following: iron-cobalt-copper pre-alloy powder: 30-40% by weight; copper-tin alloy powder: 15-30% by weight; carbonyl iron powder: 15-25% by weight; ultrafine cobalt powder: 10-20% by weight; and nickel powder: 10-15% by weight.

[0007] Preferably, the outer diameter of the substrate is 180 mm-1200 mm.

[0008] Preferably, the weight percentage of iron in the iron-cobalt-copper prealloyed powder is 50%, the weight percentage of cobalt is 25%, and the weight percentage of copper is 25%; the laser particle size D50 of the iron-cobalt-copper prealloyed powder is 4-6 μm.

[0009] Preferably, the copper-tin alloy powder contains 70% by weight of copper and 30% by weight of tin.

[0010] Preferably, the laser particle size D50 of the copper-tin alloy powder is 34-36 μm.

[0011] Preferably, the laser particle size D50 of the carbonyl iron powder is 2-4 μm.

[0012] The above-mentioned method for manufacturing a granite laser welded saw blade comprises the following steps:

[0013] (1) Ingredients: Weigh the following raw materials in the following weight proportions: 30%-40% iron-cobalt-copper pre-alloyed powder, 15%-30% copper-tin alloy powder, 15%-25% carbonyl iron powder, 10%-20% ultrafine cobalt powder, 10%-15% nickel powder, 10%-40% diamond concentration (based on 400%), and diamond particle size of 250-500 μm. Mix the above raw materials to obtain alloy matrix powder;

[0014] (2) Mixing: The alloy matrix powder obtained in step (1) is put into a vacuum three-dimensional mixer, and paraffin is added for mixing. The mixing time is 2-3 hours. During the mixing process, a granulating agent of 4 wt% of the weight of the alloy matrix powder is added to the vacuum three-dimensional mixer and mixed thoroughly.

[0015] (3) Granulation: Use a measuring cup to weigh isopropyl alcohol in an amount of 1200 ml / 10 kg, pour it into the alloy matrix powder in step (2) and stir continuously, add diluent according to the granulation situation and continue stirring until the powder is completely wetted by the glue and forms a glue agglomerate, then pour the powder after adding glue into a 20# sieve, and then pour the powder that has passed the 20# sieve into a 40# sieve and vibrate and sieve until all the powder has passed the sieve; put the powder that has passed the 40# sieve into an oven and dry it at 90-105°C for 60 minutes; after drying, pour the powder into a 30# sieve and sieve to disperse the lumps, and then pass the powder through an 80# sieve to obtain a powder with a particle size of 30-80#;

[0016] (4) Cold pressing: cold pressing the powder granulated in step (3) into a cold blade blank according to the weight of the blade;

[0017] (5) Hot pressing and sintering: the blade blank obtained in step (4) is placed in a graphite mold and hot pressed and sintered;

[0018] (6) Subsequent processing: After sintering, burrs are removed and the arc of the welding surface is polished to finally obtain the cutter head;

[0019] (7) Laser welding: using a laser welding machine to weld the cutter head obtained in step (6) to the substrate to obtain a saw blade;

[0020] (8) Perform tooth strength testing, blade sharpening, polishing, tension testing, UV printing, and packaging.

[0021] Preferably, the step (4) is specifically as follows: weighing the powder obtained in step (3) of the required weight of the cutter head, putting it into a mold, and pressing the powder into a cutter head blank under a pressure of 100-200 MPa.

[0022] Preferably, the step (5) is specifically as follows: loading the cutter head blank into a graphite mold, and then placing it on a hot pressing sintering machine, with a sintering temperature of 820-900°C, a sintering pressure of 20-30 MPa, and a holding time of 180-300s.

[0023] Preferably, in step (7), the laser welding power is 1800W and the welding speed is 30mm / s.

[0024] Compared with the prior art, the beneficial effects of the present invention are: adding ultrafine iron-cobalt-copper pre-alloyed powder to the formula raw materials of the cutter head can not only improve the sharpness of the cutter head, but also improve the sintering activity of the powder; and the laser particle size D50 of the iron-cobalt-copper pre-alloyed powder is 4-6μm, which can effectively reduce the sintering temperature; in addition; adding carbonyl iron powder to the formula, the laser particle size D50 of the carbonyl iron powder can reach 3μm, which can effectively improve the cutting speed and service life, prevent sparks from occurring during the cutting process, and enable the diamond to leak out quickly; at the same time, the cutter head and the substrate are combined together by laser welding, and stable and continuous cutting can be achieved during dry cutting without tooth loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] In the figure: 1. Cutting head; 2. Base. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figure 1 As shown, the present invention provides a granite laser welded saw blade, comprising a cutter head 1 and a base 2 welded to the cutter head 1, wherein the outer diameter of the base 2 is 180 mm to 1200 mm, and the cutter head 1 and the base 2 are welded together by laser welding. The cutter head 1 and the base 2 are combined together by laser welding, and stable and continuous cutting can be achieved during dry cutting without tooth loss.

[0029] The cutter head 1 is made of a mixture of metal powder and diamond sintered together, wherein the concentration of diamond is 10%-40% (based on 400%) and the particle size is 250-500um; the metal powder, in terms of weight percentage, includes: iron-cobalt-copper pre-alloy powder: 30-40% by weight; copper-tin alloy powder: 15-30% by weight; carbonyl iron powder: 15-25% by weight; ultrafine cobalt powder: 10-20% by weight; and nickel powder: 10-15% by weight.

[0030] It is worth noting that the weight percentage of iron in the iron-cobalt-copper pre-alloyed powder is 50%, the weight percentage of cobalt is 25%, and the weight percentage of copper is 25%; the laser particle size D50 of the iron-cobalt-copper pre-alloyed powder is 4-6μm; the weight percentage of copper in the copper-tin alloy powder is 70%, and the weight percentage of tin is 30%; the laser particle size D50 of the copper-tin alloy powder is 34-36μm; and the laser particle size D50 of the carbonyl iron powder is 2-4μm.

[0031] The ultrafine iron-cobalt-copper pre-alloyed powder not only enhances the sharpness of the cutting head 1 but also improves the powder's sintering activity. The laser particle size D50 of the iron-cobalt-copper pre-alloyed powder is set at 4-6 μm, effectively reducing the sintering temperature. The laser particle size D50 of the carbonyl iron powder can reach 3 μm, effectively increasing the cutting speed and service life of the cutting head 1, preventing sparks during cutting, and enabling rapid diamond release.

[0032] The above-mentioned method for manufacturing a granite laser welded saw blade comprises the following steps:

[0033] (1) Ingredients: Weigh the following raw materials in the following weight proportions: 30%-40% iron-cobalt-copper pre-alloyed powder, 15%-30% copper-tin alloy powder, 15%-25% carbonyl iron powder, 10%-20% ultrafine cobalt powder, 10%-15% nickel powder, 10%-40% diamond concentration (based on 400%), and diamond particle size of 250-500 μm. Mix the above raw materials to obtain alloy matrix powder;

[0034] (2) Mixing: The alloy matrix powder obtained in step (1) is put into a vacuum three-dimensional mixer, and paraffin is added for mixing. The mixing time is 2-3 hours. During the mixing process, a granulating agent of 4 wt% of the weight of the alloy matrix powder is added to the vacuum three-dimensional mixer and mixed thoroughly.

[0035] (3) Granulation: Use a measuring cup to weigh isopropyl alcohol in an amount of 1200 ml / 10 kg, pour it into the alloy matrix powder in step (2) and stir continuously, add diluent according to the granulation situation and continue stirring until the powder is completely wetted by the glue and forms a glue agglomerate, then pour the powder after adding glue into a 20# sieve, and then pour the powder that has passed the 20# sieve into a 40# sieve and vibrate and sieve until all the powder has passed the sieve; put the powder that has passed the 40# sieve into an oven and dry it at 90-105°C for 60 minutes; after drying, pour the powder into a 30# sieve and sieve to disperse the lumps, and then pass the powder through an 80# sieve to obtain a powder with a particle size of 30-80#;

[0036] (4) Cold pressing: cold pressing the powder granulated in step (3) into a cold blade blank according to the weight of the blade 1;

[0037] (5) Hot pressing and sintering: the blade blank obtained in step (4) is placed in a graphite mold and hot pressed and sintered;

[0038] (6) Subsequent processing: after sintering, burrs are processed and the arc of the welding surface is polished to finally obtain the cutter head 1;

[0039] (7) Laser welding: using a laser welding machine to weld the cutter head 1 obtained in step (6) to the base 2 to obtain a saw blade;

[0040] (8) Perform tooth strength testing, blade sharpening, polishing, tension testing, UV printing, and packaging.

[0041] Among them, step (4) is specifically: weighing the powder obtained in step (3) of the required weight of the cutter head 1, putting it into a mold, and pressing the powder into a cutter head blank under a pressure of 100-200 MPa.

[0042] Step (5) is specifically as follows: the blade blank is loaded into a graphite mold, and then placed on a hot pressing sintering machine, with a sintering temperature of 820-900°C, a sintering pressure of 20-30 MPa, and a holding time of 180-300 seconds.

[0043] In step (7), the laser welding power is 1800W and the welding speed is 30mm / s.

[0044] The saw blade made by the above technical solution has the advantages of fast cutting speed and long service life. Compared with similar products, the saw blade has a cutting speed more than 30% higher and a service life more than 40% longer.

[0045] The present invention will be further described in detail below with reference to specific embodiments.

[0046] Example 1:

[0047] like Figure 1As shown, the present invention provides a granite laser welded saw blade, comprising a cutter head 1 and a base 2 welded to the cutter head 1, wherein the outer diameter of the base 2 is 180 mm-1200 mm, and the cutter head 1 and the base 2 are welded by laser welding.

[0048] The cutter head 1 is made of a mixture of metal powder and diamond, wherein the concentration of diamond is 20% (based on 400%) and the particle size is 420-500um; the metal powder, in terms of weight percentage, includes: iron-cobalt-copper pre-alloyed powder: 35% by weight; copper-tin alloy powder: 15% by weight; carbonyl iron powder: 20% by weight; ultrafine cobalt powder: 20% by weight; and nickel powder: 10% by weight.

[0049] The above-mentioned method for manufacturing a granite laser welded saw blade comprises the following steps:

[0050] (1) Ingredients: Weigh the following raw materials in the following weight proportions: 35% iron-cobalt-copper pre-alloyed powder, 15% copper-tin alloy powder, 20% carbonyl iron powder, 20% ultrafine cobalt powder, 10% nickel powder, 20% diamond concentration (presumably 400%), and a diamond particle size of 250-500 μm. Mix the above raw materials to obtain alloy matrix powder;

[0051] (2) Mixing: The alloy matrix powder obtained in step (1) is put into a vacuum three-dimensional mixer, and paraffin is added for mixing. The mixing time is 2-3 hours. During the mixing process, a granulating agent of 4 wt% of the weight of the alloy matrix powder is added to the vacuum three-dimensional mixer and mixed thoroughly.

[0052] (3) Granulation: Use a measuring cup to weigh isopropyl alcohol in an amount of 1200 ml / 10 kg, pour it into the alloy matrix powder in step (2) and stir continuously, add diluent according to the granulation situation and continue stirring until the powder is completely wetted by the glue and forms a glue agglomerate, then pour the powder after adding glue into a 20# sieve, and then pour the powder that has passed the 20# sieve into a 40# sieve and vibrate and sieve until all the powder has passed the sieve; put the powder that has passed the 40# sieve into an oven and dry it at 100°C for 60 minutes; after drying, pour the powder into a 30# sieve and sieve to disperse the agglomerates, and then pass the powder through an 80# sieve to obtain a powder with a particle size of 30-80#;

[0053] (4) Cold pressing: weigh the powder obtained in step (3) of the desired weight of the cutter head 1, put it into a mold, and press the powder into a cutter head blank at a pressure of 100-200 MPa;

[0054] (5) Hot pressing sintering: The blade blank is placed in a graphite mold and then placed on a hot pressing sintering machine. The sintering temperature is 820-900°C, the sintering pressure is 20-30 MPa, and the holding time is 180-300 seconds.

[0055] (6) Subsequent processing: after sintering, burrs are processed and the arc of the welding surface is polished to finally obtain the cutter head 1;

[0056] (7) Laser welding: The cutter head 1 obtained in step (6) is welded to the substrate 2 using a laser welding machine to obtain a saw blade. The laser welding power is 1800 W and the welding speed is 30 mm / s.

[0057] (8) Perform tooth strength testing, blade sharpening, polishing, tension testing, UV printing, and packaging.

[0058] Saw blades manufactured using the above-described technical solution were subjected to various performance tests, and those that passed the tests were deemed finished products. The resulting circular saw blades had a blade size of 400 mm, a cutting speed of 6 m / min, and a cutting life of over 2,000 m3. Therefore, the present invention offers the advantages of high cutting speed and long service life.

[0059] Example 2:

[0060] like Figure 1 As shown, the present invention provides a granite laser-welded saw blade comprising a blade head 1 and a base body 2 welded to the blade head 1, the blade head 1 and base body 2 being welded by laser welding. The base body 2 has an outer diameter of 180 mm to 1200 mm. The blade head 1 is sintered from a mixture of metal powder and diamond, wherein the diamond concentration is 25% (based on a 400% system) and the particle size is 420 to 500 μm. The metal powder, by weight percentage, comprises: iron-cobalt-copper pre-alloyed powder: 40% by weight; copper-tin alloy powder: 20% by weight; carbonyl iron powder: 10% by weight; ultrafine cobalt powder: 20% by weight; and nickel powder: 10% by weight.

[0061] The above-mentioned method for manufacturing a granite laser welded saw blade comprises the following steps:

[0062] (1) Ingredients: Weigh the following raw materials in the following weight proportions: 40% iron-cobalt-copper pre-alloyed powder, 20% copper-tin alloy powder, 10% carbonyl iron powder, 20% ultrafine cobalt powder, 10% nickel powder, 25% diamond concentration (based on 400%), and a diamond particle size of 35 / 40. Mix the above raw materials to obtain alloy matrix powder;

[0063] (2) Mixing: The alloy matrix powder obtained in step (1) is put into a vacuum three-dimensional mixer, and paraffin is added for mixing. The mixing time is 2-3 hours. During the mixing process, a granulating agent of 4 wt% of the weight of the alloy matrix powder is added to the vacuum three-dimensional mixer and mixed thoroughly.

[0064] (3) Granulation: Use a measuring cup to weigh isopropyl alcohol in an amount of 1200 ml / 10 kg, pour it into the alloy matrix powder in step (2) and stir continuously, add diluent according to the granulation situation and continue stirring until the powder is completely wetted by the glue and forms a glue agglomerate, then pour the powder after adding glue into a 20# sieve, and then pour the powder that has passed the 20# sieve into a 40# sieve and vibrate and sieve until all the powder has passed the sieve; put the powder that has passed the 40# sieve into an oven and dry it at 100°C for 60 minutes; after drying, pour the powder into a 30# sieve and sieve to disperse the agglomerates, and then pass the powder through an 80# sieve to obtain a powder with a particle size of 30-80#;

[0065] (4) Cold pressing: weigh the powder obtained in step (3) of the desired weight of the cutter head 1, put it into a mold, and press the powder into a cutter head blank at a pressure of 100-200 MPa;

[0066] (5) Hot pressing sintering: The blade blank is placed in a graphite mold and then placed on a hot pressing sintering machine. The sintering temperature is 820-900°C, the sintering pressure is 20-30 MPa, and the holding time is 180-300 seconds.

[0067] (6) Subsequent processing: after sintering, burrs are processed and the arc of the welding surface is polished to finally obtain the cutter head 1;

[0068] (7) Laser welding: The cutter head 1 obtained in step (6) is welded to the substrate 2 using a laser welding machine to obtain a saw blade. The laser welding power is 1800 W and the welding speed is 30 mm / s.

[0069] (8) Perform tooth strength testing, blade sharpening, polishing, tension testing, UV printing, and packaging.

[0070] Saw blades manufactured using the above-described technical solution were subjected to various performance tests, and those that passed the tests were deemed finished products. The manufactured saw blades were circular saw blades with a diameter of 400 mm, a cutting speed of 7 m / min, and a cutting life of over 2,500 m3. Therefore, the present invention has the advantages of high cutting speed and long service life.

[0071] Example 3:

[0072] like Figure 1As shown, the present invention provides a granite laser-welded saw blade comprising a blade head 1 and a base body 2 welded to the blade head 1, the blade head 1 and base body 2 being welded by laser welding. The base body 2 has an outer diameter of 180 mm to 1200 mm. The blade head 1 is sintered from a mixture of metal powder and diamond, wherein the diamond concentration is 10% (based on a 400% system) and the particle size is 35 / 40. The metal powder, by weight percentage, comprises: iron-cobalt-copper pre-alloyed powder: 30% by weight; copper-tin alloy powder: 25% by weight; carbonyl iron powder: 15% by weight; ultrafine cobalt powder: 15% by weight; and nickel powder: 15% by weight.

[0073] The above-mentioned method for manufacturing a granite laser welded saw blade comprises the following steps:

[0074] (1) Ingredients: Weigh the following raw materials in the following weight proportions: 30% iron-cobalt-copper pre-alloyed powder, 25% copper-tin alloy powder, 15% carbonyl iron powder, 15% ultrafine cobalt powder, 15% nickel powder, 10% diamond concentration (based on 400%), and a diamond particle size of 35 / 40. Mix the above raw materials to obtain alloy matrix powder;

[0075] (2) Mixing: The alloy matrix powder obtained in step (1) is put into a vacuum three-dimensional mixer, and paraffin is added for mixing. The mixing time is 2-3 hours. During the mixing process, a granulating agent of 4 wt% of the weight of the alloy matrix powder is added to the vacuum three-dimensional mixer and mixed thoroughly.

[0076] (3) Granulation: Use a measuring cup to weigh isopropyl alcohol in an amount of 1200 ml / 10 kg, pour it into the alloy matrix powder in step (2) and stir continuously, add diluent according to the granulation situation and continue stirring until the powder is completely wetted by the glue and forms a glue agglomerate, then pour the powder after adding glue into a 20# sieve, and then pour the powder that has passed the 20# sieve into a 40# sieve and vibrate and sieve until all the powder has passed the sieve; put the powder that has passed the 40# sieve into an oven and dry it at 100°C for 60 minutes; after drying, pour the powder into a 30# sieve and sieve to disperse the agglomerates, and then pass the powder through an 80# sieve to obtain a powder with a particle size of 30-80#;

[0077] (4) Cold pressing: weigh the powder obtained in step (3) of the desired weight of the cutter head 1, put it into a mold, and press the powder into a cutter head blank at a pressure of 100-200 MPa;

[0078] (5) Hot pressing sintering: The blade blank is placed in a graphite mold and then placed on a hot pressing sintering machine. The sintering temperature is 820-900°C, the sintering pressure is 20-30 MPa, and the holding time is 180-300 seconds.

[0079] (6) Subsequent processing: after sintering, burrs are processed and the arc of the welding surface is polished to finally obtain the cutter head 1;

[0080] (7) Laser welding: The cutter head 1 obtained in step (6) is welded to the substrate 2 using a laser welding machine to obtain a saw blade. The laser welding power is 1800 W and the welding speed is 30 mm / s.

[0081] (8) Perform tooth strength testing, blade sharpening, polishing, tension testing, UV printing, and packaging.

[0082] Saw blades manufactured using the above-described technical solution were subjected to various performance tests, and those that passed the tests were deemed finished products. The manufactured saw blades were circular saw blades with a diameter of 400 mm, a cutting speed of 6 m / min, and a cutting life of over 2,500 m3. Therefore, the present invention has the advantages of high cutting speed and long service life.

[0083] Example 4:

[0084] like Figure 1 As shown, the present invention provides a granite laser-welded saw blade comprising a blade head 1 and a base 2 welded to the blade head 1, the blade head 1 and base 2 being welded by laser welding. The base 2 has an outer diameter of 180 mm to 1200 mm. The blade head 1 is sintered from a mixture of metal powder and diamond, wherein the diamond concentration is 30% (based on a 400% system) and the particle size is 35 / 40. The metal powder, by weight percentage, comprises: iron-cobalt-copper pre-alloyed powder: 35% by weight; copper-tin alloy powder: 30% by weight; carbonyl iron powder: 15% by weight; ultrafine cobalt powder: 10% by weight; and nickel powder: 10% by weight.

[0085] The above-mentioned method for manufacturing a granite laser welded saw blade comprises the following steps:

[0086] (1) Ingredients: Weigh the following raw materials in the following weight proportions: 35% iron-cobalt-copper pre-alloyed powder, 30% copper-tin alloy powder, 15% carbonyl iron powder, 10% ultrafine cobalt powder, 10% nickel powder, 30% diamond concentration (prepared as 400%), and a diamond particle size of 35 / 40. Mix the above raw materials to obtain alloy matrix powder;

[0087] (2) Mixing: The alloy matrix powder obtained in step (1) is put into a vacuum three-dimensional mixer, and paraffin is added for mixing. The mixing time is 2-3 hours. During the mixing process, a granulating agent of 4 wt% of the weight of the alloy matrix powder is added to the vacuum three-dimensional mixer and mixed thoroughly.

[0088] (3) Granulation: Use a measuring cup to weigh isopropyl alcohol in an amount of 1200 ml / 10 kg, pour it into the alloy matrix powder in step (2) and stir continuously, add diluent according to the granulation situation and continue stirring until the powder is completely wetted by the glue and forms a glue agglomerate, then pour the powder after adding glue into a 20# sieve, and then pour the powder that has passed the 20# sieve into a 40# sieve and vibrate and sieve until all the powder has passed the sieve; put the powder that has passed the 40# sieve into an oven and dry it at 100°C for 60 minutes; after drying, pour the powder into a 30# sieve and sieve to disperse the agglomerates, and then pass the powder through an 80# sieve to obtain a powder with a particle size of 30-80#;

[0089] (4) Cold pressing: weigh the powder obtained in step (3) of the desired weight of the cutter head 1, put it into a mold, and press the powder into a cutter head blank at a pressure of 100-200 MPa;

[0090] (5) Hot pressing sintering: The blade blank is placed in a graphite mold and then placed on a hot pressing sintering machine. The sintering temperature is 820-900°C, the sintering pressure is 20-30 MPa, and the holding time is 180-300 seconds.

[0091] (6) Subsequent processing: after sintering, burrs are processed and the arc of the welding surface is polished to finally obtain the cutter head 1;

[0092] (7) Laser welding: The cutter head 1 obtained in step (6) is welded to the substrate 2 using a laser welding machine to obtain a saw blade. The laser welding power is 1800 W and the welding speed is 30 mm / s.

[0093] (8) Perform tooth strength testing, blade sharpening, polishing, tension testing, UV printing, and packaging.

[0094] Saw blades manufactured using the above-described technical solution were subjected to various performance tests, and those that passed the tests were deemed finished products. The manufactured saw blades were circular saw blades with a diameter of 400 mm, a cutting speed of 8 m / min, and a cutting life of over 2,500 m3. Therefore, the present invention has the advantages of high cutting speed and long service life.

[0095] Example 5:

[0096] like Figure 1As shown, the present invention provides a granite laser-welded saw blade comprising a blade head 1 and a base 2 welded to the blade head 1, the blade head 1 and base 2 being welded by laser welding. The base 2 has an outer diameter of 180 mm to 1200 mm. The blade head 1 is sintered from a mixture of metal powder and diamond, wherein the diamond concentration is 40% (presumably 400%) and the particle size is 35 / 40. The metal powder, by weight percentage, comprises: iron-cobalt-copper pre-alloyed powder: 30% by weight; copper-tin alloy powder: 20% by weight; carbonyl iron powder: 25% by weight; ultrafine cobalt powder: 10% by weight; and nickel powder: 15% by weight.

[0097] The above-mentioned method for manufacturing a granite laser welded saw blade comprises the following steps:

[0098] (1) Ingredients: Weigh the following raw materials in the following weight proportions: 30% iron-cobalt-copper pre-alloyed powder, 20% copper-tin alloy powder, 25% carbonyl iron powder, 10% ultrafine cobalt powder, 15% nickel powder, 40% diamond concentration (based on 400%), and a diamond particle size of 35 / 40. Mix the above raw materials to obtain alloy matrix powder;

[0099] (2) Mixing: The alloy matrix powder obtained in step (1) is put into a vacuum three-dimensional mixer, and paraffin is added for mixing. The mixing time is 2-3 hours. During the mixing process, a granulating agent of 4 wt% of the weight of the alloy matrix powder is added to the vacuum three-dimensional mixer and mixed thoroughly.

[0100] (3) Granulation: Use a measuring cup to weigh isopropyl alcohol in an amount of 1200 ml / 10 kg, pour it into the alloy matrix powder in step (2) and stir continuously, add diluent according to the granulation situation and continue stirring until the powder is completely wetted by the glue and forms a glue agglomerate, then pour the powder after adding glue into a 20# sieve, and then pour the powder that has passed the 20# sieve into a 40# sieve and vibrate and sieve until all the powder has passed the sieve; put the powder that has passed the 40# sieve into an oven and dry it at 100°C for 60 minutes; after drying, pour the powder into a 30# sieve and sieve to disperse the agglomerates, and then pass the powder through an 80# sieve to obtain a powder with a particle size of 30-80#;

[0101] (4) Cold pressing: weigh the powder obtained in step (3) of the desired weight of the cutter head 1, put it into a mold, and press the powder into a cutter head blank at a pressure of 100-200 MPa;

[0102] (5) Hot pressing sintering: The blade blank is placed in a graphite mold and then placed on a hot pressing sintering machine. The sintering temperature is 820-900°C, the sintering pressure is 20-30 MPa, and the holding time is 180-300 seconds.

[0103] (6) Subsequent processing: after sintering, burrs are processed and the arc of the welding surface is polished to finally obtain the cutter head 1;

[0104] (7) Laser welding: The cutter head 1 obtained in step (6) is welded to the substrate 2 using a laser welding machine to obtain a saw blade. The laser welding power is 1800 W and the welding speed is 30 mm / s.

[0105] (8) Perform tooth strength testing, blade sharpening, polishing, tension testing, UV printing, and packaging.

[0106] Saw blades manufactured using the above-described technical solution were subjected to various performance tests, and those that passed the tests were deemed finished products. The manufactured saw blades were circular saw blades with a diameter of 400 mm, a cutting speed of 7 m / min, and a cutting life of over 2,500 m3. Therefore, the present invention has the advantages of high cutting speed and long service life.

[0107] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for manufacturing a granite laser welded saw blade, characterized in that: The granite laser welding saw blade comprises a cutter head (1) and a base body (21) welded to the cutter head (1). The cutter head (1) is formed by sintering a mixture of metal powder and diamond. The concentration of diamond is 10%-40% according to 400%, and the particle size is 250-500um. The metal powder comprises, by weight percentage: iron-cobalt-copper pre-alloy powder: 30-40% by weight; copper-tin alloy powder: 15-30% by weight; carbonyl iron powder: 15-25% by weight; ultrafine cobalt powder: 10-20% by weight. ratio; nickel powder: 10-15% by weight, the weight percentage of iron in the iron-cobalt-copper pre-alloyed powder is 50%, the weight percentage of cobalt is 25%, and the weight percentage of copper is 25%; the laser particle size D50 of the iron-cobalt-copper pre-alloyed powder is 4-6 μm; the weight percentage of copper in the copper-tin alloy powder is 70%, and the weight percentage of tin is 30%; the laser particle size D50 of the copper-tin alloy powder is 34-36 μm; the laser particle size D50 of the carbonyl iron powder is 2-4 μm, and the above-mentioned production method comprises the following steps: (1) Ingredients: Weigh the following raw materials in the following weight proportions: 30%-40% iron-cobalt-copper pre-alloyed powder, 15%-30% copper-tin alloy powder, 15%-25% carbonyl iron powder, 10%-20% ultrafine cobalt powder, 10%-15% nickel powder, 10%-40% concentration of 400% diamond, and diamond particle size of 250-500 μm, and mix the above raw materials to obtain alloy matrix powder; (2) Mixing: The alloy matrix powder obtained in step (1) is put into a vacuum three-dimensional mixer, and paraffin is added for mixing. The mixing time is 2-3 hours. During the mixing process, a granulating agent of 4 wt% of the weight of the alloy matrix powder is added to the vacuum three-dimensional mixer and mixed thoroughly. (3) Granulation: Use a measuring cup to weigh isopropyl alcohol in an amount of 1200 ml / 10 kg, pour it into the alloy matrix powder in step (2) and stir continuously, add diluent according to the granulation situation and continue stirring until the powder is completely wetted by the glue and forms a glue agglomerate, then pour the powder after adding glue into a 20# sieve, and then pour the powder that has passed the 20# sieve into a 40# sieve and vibrate and sieve until all the powder has passed the sieve; put the powder that has passed the 40# sieve into an oven and dry it at 90-105°C for 60 minutes; after drying, pour the powder into a 30# sieve and sieve to disperse the lumps, and then pass the powder through an 80# sieve to obtain a powder with a particle size of 30-80#; (4) Cold pressing: cold pressing the powder granulated in step (3) into a cold blade blank according to the weight of the blade (1); (5) Hot pressing and sintering: the blade blank obtained in step (4) is placed in a graphite mold and hot pressed and sintered; (6) Subsequent processing: after sintering, burr treatment is performed and the arc of the welding surface is polished to finally obtain the cutter head (1); (7) Laser welding: using a laser welding machine to weld the cutter head (1) obtained in step (6) to the base (2) to obtain a saw blade; (8) Perform tooth strength testing, blade sharpening, polishing, tension testing, UV printing, and packaging.

2. The method for manufacturing a granite laser welding saw blade according to claim 1, characterized in that: The step (4) specifically comprises: weighing the powder obtained in step (3) of the required weight of the cutter head (1), putting the powder into a mold, and pressing the powder into a cutter head blank at a pressure of 100-200 MPa.

3. The method for manufacturing a granite laser welded saw blade according to claim 1, characterized in that: The step (5) is specifically as follows: the blade blank is placed in a graphite mold, and then placed on a hot pressing sintering machine, with a sintering temperature of 820-900°C, a sintering pressure of 20-30MPa, and a holding time of 180-300s.

4. The method for manufacturing a granite laser welded saw blade according to claim 1, characterized in that: In the step (7), the laser welding power is 1800W and the welding speed is 30mm / s.

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