CN111906944A - Laser welding diamond saw blade for cutting reinforced concrete and preparation process thereof - Google Patents

Laser welding diamond saw blade for cutting reinforced concrete and preparation process thereof Download PDF

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Publication number
CN111906944A
CN111906944A CN202010579555.1A CN202010579555A CN111906944A CN 111906944 A CN111906944 A CN 111906944A CN 202010579555 A CN202010579555 A CN 202010579555A CN 111906944 A CN111906944 A CN 111906944A
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diamond
tool bit
laser
parts
saw blade
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蒋武峰
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Jiangsu Huachang Tools Manufacturing Co ltd
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Jiangsu Huachang Tools Manufacturing Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/121—Circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C22C30/04—Alloys containing less than 50% by weight of each constituent containing tin or lead
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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  • Metallurgy (AREA)
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  • Polishing Bodies And Polishing Tools (AREA)
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Abstract

The invention discloses a laser welding diamond saw blade for cutting reinforced concrete and a preparation process thereof, and belongs to the technical field of reinforced concrete cutting tools. The laser welding diamond saw blade comprises a circular base body and a diamond tool bit welded on the outer edge of the base body, wherein: the diamond tool bits are uniformly distributed on the outer circumference of the substrate, V-shaped grooves are formed between every two adjacent diamond tool bits, and arc-shaped grooves I extend into the substrate; the outer end face of the diamond tool bit is designed into a long city tooth structure. The tool bit comprises the raw materials of copper, iron, tin, nickel, manganese, tungsten carbide powder, diamond and liquid paraffin, and the tool bit and the substrate are welded into a whole through laser. According to the invention, through the optimized design of the cutter head formula and the cutter head shape, the laser sheet for cutting the reinforced concrete is quickly cut into and positioned through the excircle teeth, the subsequent diamond cutter head is gradually enlarged along with the deepening of the cutting depth, and the continuous U-shaped groove can meet the construction requirements of various road conditions.

Description

Laser welding diamond saw blade for cutting reinforced concrete and preparation process thereof
Technical Field
The invention relates to the technical field of reinforced concrete cutting tools, in particular to a laser welding diamond saw blade for cutting reinforced concrete and a preparation process thereof.
Background
The diamond saw blade is a cutting tool, and is widely applied to processing of hard and brittle materials such as concrete, refractory materials, stone materials, ceramics and the like. The diamond saw blade mainly comprises a substrate and a tool bit, wherein the substrate is a main supporting part for bonding the tool bit. The cutting tip is a portion which is used for cutting during use, and the cutting tip is continuously consumed during use, while the substrate is not used, and the cutting tip is capable of cutting because it contains diamond, which is currently the hardest substance, which frictionally cuts a work object in the cutting tip. And the diamond particles are wrapped inside the tool bit by metal.
Safety and efficiency are indispensable requirements for laser-welded sheets in the large industrial context of today's high-speed development, and the safety problem of laser-welded sheets is a constant subject, especially when used in harsh environments. Meanwhile, workers of construction crews hope to improve the working efficiency as much as possible under the condition of ensuring the quality and the safety.
The invention content is as follows:
the invention aims to provide a laser welding diamond saw blade for cutting reinforced concrete and a preparation process thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a laser welding diamond saw blade for cutting reinforced concrete, comprising a circular base body and diamond segments welded to the outer edge of the base body, wherein: the diamond tool bits are uniformly distributed on the outer circumference of the substrate, V-shaped grooves are formed between every two adjacent diamond tool bits, and arc-shaped grooves I extend into the substrate; the outer end face of the diamond tool bit is designed to be of a long city tooth structure (the outer end face of the diamond tool bit is designed with a plurality of U-shaped grooves, and the number of the U-shaped grooves on each diamond tool bit is 4-6).
The center of the substrate is provided with a mounting hole for mounting the diamond saw blade on a cutting machine; the base body is also provided with cooling holes and arc-shaped grooves II, the arc-shaped grooves II are arranged between the mounting holes and the arc-shaped grooves I, and the number of the arc-shaped grooves II is equal to that of the arc-shaped grooves I; one end of each arc-shaped groove II is positioned between every two adjacent arc-shaped grooves I, the other end of each arc-shaped groove II extends towards the direction of the mounting hole, and the other end of each arc-shaped groove II is in a hook shape; 2-5 cooling holes are arranged between two adjacent arc-shaped grooves II.
The material of the substrate is 30 CrMo; the diamond tool bit comprises the following raw materials in parts by weight:
14-35 parts of copper, 22-46 parts of iron, 2-7 parts of tin, 2-10 parts of nickel, 4-17 parts of manganese, 11-19 parts of tungsten carbide, 0.1-0.7 part of liquid paraffin and 1.0-2.2 parts of diamond.
The diamond tool bit comprises the following raw materials in parts by weight:
17-29 parts of copper, 27-41 parts of iron, 4-7 parts of tin, 4-8 parts of nickel, 9-15 parts of manganese, 13-17 parts of tungsten carbide, 0.2-0.6 part of liquid paraffin and 1.1-1.8 parts of diamond.
The diamond tool bit comprises the following more preferable raw materials in parts by weight:
25 parts of copper, 40 parts of iron, 5 parts of tin, 7 parts of nickel, 9 parts of manganese, 17 parts of tungsten carbide, 0.3 part of liquid paraffin and 1.2 parts of diamond.
In the material of the tool bit, the diamond granularity is 30/40, 40/50 or 50/60, and the compressive strength is 25-40 kg.
The preparation process of the laser welding diamond saw blade for cutting reinforced concrete comprises the following steps:
(1) processing a matrix:
the steel plate is subjected to laser cutting to form a matrix shape, and then is subjected to heat treatment, wherein the heat treatment process comprises the following steps: oil quenching at 865-880 deg.C for 10-15 min, and tempering at 450-500 deg.C for 2-5 hr; and after heat treatment, carrying out conventional leveling and polishing for later use.
(2) Preparing a diamond tool bit:
uniformly mixing the raw materials of the diamond tool bit in proportion, and performing cold press molding; mixing the transition layer raw materials and then performing cold press molding; arranging a transition layer with the thickness of 1-2mm on the inner side of the diamond tool bit after cold press molding, and performing hot press sinteringThe diamond tool bit is connected with the transition layer together and is manufactured into the diamond tool bit with the transition layer through grinding by a grinding wheel and an abrasive belt; the hot-pressing sintering temperature is 800-840 ℃, and the pressure is 300-380 kg/cm2And the heat preservation time is 120-300 seconds. The transition layer has the chemical composition as follows: fe45-60 wt.%, Mn2-5 wt.%, and the balance of Cu.
(3) Laser welding:
placing a diamond tool bit on a corresponding position around a base body according to the drawing requirements, adjusting the light spot of a laser welding machine to a position where the tool bit and the base body are suitable, and starting a laser welding machine for welding to enable the tool bit and the base body to be welded together at the moment of laser penetration; the welding process parameters are as follows: by using CO2Carrying out double-sided laser welding by a laser, wherein the diameter of a laser spot is 0.4mm, the laser power is 700-750W, and the welding speed is 10-14 mm/s; the protective gas is argon, the flow of the protective gas is 0.5L/min, the defocusing amount is 1.2-1.6mm, the laser beam deflects to one side of the substrate, the offset is 0.2-0.3mm, and the laser incidence angle is 12-15 degrees. The width of the welding seam is 1-1.5mm, and the penetration depth is 2-2.6 mm.
(4) And grinding the tool bit working surface of the welded diamond saw blade by using a grinding wheel to expose the diamond, and grinding by using a 120-mesh abrasive belt in a grinding machine until the surface of the base body is bright.
The laser welding diamond saw blade designed and prepared by the invention can meet the requirements of cutting various road surfaces, paving construction of wall surfaces and the like, and has the following advantages:
1. through the research and design of tool bit grinding technology, with diamond segments design long city tooth shape, each U type basin can cool off fast and get rid of the cutting piece, finally reaches the purpose of rapid stabilization cutting.
2. According to the invention, the base body and the cutter head are subjected to double-sided laser welding, optimized double-sided laser welding technological parameters are adopted according to the chemical composition of the cutter head, so that the bending strength (the bending strength of a laser welding line is more than 2000MPa and is more than that of the base body) is improved, the safety is higher, and meanwhile, the design of two arc-shaped grooves on the base body can improve the cooling speed of dry cutting air, so that the base body is always kept in a low-temperature high-strength state, the use safety coefficient of a saw blade is improved, and the cutter head is not.
3. In the tool bit formula, a proper amount of alloy elements such as nickel, manganese, tungsten carbide and the like are added, so that the heat resistance of the tool bit is improved, and the laser piece can be cut more durably in a dry mode under the same condition.
4. The transition layer is made of three elements FeMnCu (Fe45-60 wt.%, Mn2-5 wt.%, Cu allowance), the transition layer does not contain low-melting-point elements Sn and the like, chemical components (Fe and a small amount of Mn) of a base body and chemical components (containing a large amount of Fe, Cu and a small amount of Mn) of a cutter head are considered, elements similar to the chemical components of the base body and the cutter head are selected as far as possible during selection of components of a filter layer, welding combination degree can be improved, meanwhile, the Mn element is selected, on one hand, the base body and the cutter head both contain Mn elements, combination of special-shaped materials is facilitated, on the other hand, the small amount of Mn can play a role in solid solution strengthening, abrasion resistance can be improved, and welding air holes can.
Drawings
FIG. 1 is a schematic view of a laser welded diamond saw blade according to the present invention.
Fig. 2 is a cross-sectional view of a laser welded diamond saw blade according to the present invention.
In the figure: 1-a substrate; 2-a diamond tool bit; 3-V type groove; 4-arc groove I; 5-mounting holes; 6-cooling holes; 7-arc type groove II.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
The present invention provides a laser welding diamond saw blade for cutting reinforced concrete, the structure of which is shown in fig. 1-2. The diamond saw blade comprises a circular base body 1 and a diamond tool bit 2 welded on the outer edge of the base body, wherein: the diamond tool bits 2 are uniformly distributed on the outer circumference of the substrate, V-shaped grooves 3 are formed between every two adjacent diamond tool bits, and arc-shaped grooves I4 extend into the substrate from the V-shaped grooves 3; the outer end face of the diamond tool bit is designed to be of a long-city tooth structure, the long-city tooth structure means that a plurality of U-shaped grooves are designed on the outer end face of the diamond tool bit, and the number of the U-shaped grooves on each diamond tool bit is 4-6.
The center of the matrix is provided with a mounting hole 5 for mounting the diamond saw blade on the cutting machine; the base body is also provided with cooling holes 6 and arc-shaped grooves II 7, the arc-shaped grooves II 7 are arranged between the mounting holes and the arc-shaped grooves I, and the number of the arc-shaped grooves II is equal to that of the arc-shaped grooves I; one end of each arc-shaped groove II is positioned between every two adjacent arc-shaped grooves I, the other end of each arc-shaped groove II extends towards the direction of the mounting hole, and the other end of each arc-shaped groove II is in a hook shape; 2-5 cooling holes are arranged between two adjacent arc-shaped grooves II.
Example 1:
the embodiment is a preparation method of a laser welding diamond saw blade for cutting reinforced concrete, which comprises the following specific processes:
(1) processing a matrix:
carrying out laser cutting on the steel plate to obtain a matrix shape, and then carrying out heat treatment: oil quenching at 860 deg.c for 10-15 min and tempering at 480 deg.c for 2-5 hr; leveling and polishing for later use.
(2) Preparing a diamond tool bit:
2.7kg of copper powder, 3.9kg of iron, 0.55kg of nickel, 1.15kg of manganese, 0.4kg of tin and 1.3kg of tungsten carbide are put into a mixing barrel to be mixed for 30 minutes, 0.08kg of liquid paraffin and 0.2kg of diamond are added, and the materials are mixed for 3 hours. Pouring the mixed powder into a mould for cold press molding;
the transition layer is made of Fe50 wt%, Mn4 wt% and Cu in balance, and the transition layer is formed by cold pressing after being uniformly mixed;
arranging a transition layer with the thickness of 1.5mm on the inner side of the diamond tool bit subjected to cold press molding, connecting the diamond tool bit and the transition layer together through hot-pressing sintering, and grinding the diamond tool bit through a grinding wheel abrasive belt to manufacture the diamond tool bit with the transition layer; the hot-pressing sintering temperature is 820 ℃ and the pressure is 320kg/cm2And the holding time is 200 seconds.
(3) Laser welding:
placing a diamond tool bit on a corresponding position around a base body according to the drawing requirements, adjusting the light spot of a laser welding machine to a position where the tool bit and the base body are suitable, and starting a laser welding machine for welding to enable the tool bit and the base body to be welded together at the moment of laser penetration; the welding process parameters are as follows: by using CO2The laser carries out double-sided laser welding with the laser spot diameter of 0.4mm and the laser power of 720W, and the welding speed is 12 mm/s; the protective gas is argon, the flow of the protective gas is 0.5L/min, the defocusing amount is 1.5mm, the laser beam deflects to one side of the substrate, the offset is 0.25mm, and the laser incidence angle is 15 degrees. The width of the welding seam is 1.4mm, and the penetration depth is 2.5 mm.
(4) And grinding the tool bit working surface of the welded diamond saw blade by using a grinding wheel to expose the diamond, and grinding by using a 120-mesh abrasive belt in a grinding machine until the surface of the base body is bright. And finally, detecting the welding strength of each diamond tool bit, and printing, packaging and warehousing after the welding strength is qualified.
The bending strength of the laser welding line is 2150MPa and is larger than that of the matrix, the matrix is broken during testing, and the welding line is intact.
Example 2:
the embodiment is a preparation method of a laser welding diamond saw blade for cutting reinforced concrete, which comprises the following specific processes:
(1) processing a matrix:
carrying out laser cutting on the steel plate to obtain a matrix shape, and then carrying out heat treatment: oil quenching at 860 deg.c for 10-15 min and tempering at 480 deg.c for 2-5 hr; leveling and polishing for later use.
(2) Preparing a diamond tool bit:
2.65kg of copper powder, 4.0kg of iron, 0.5kg of nickel, 1.1kg of manganese, 0.40kg of tin and 1.35kg of tungsten carbide are put into a mixing barrel to be mixed for 30 minutes, 0.06kg of liquid paraffin and 0.18kg of diamond are added, and the materials are mixed for 3 hours. Pouring the mixed powder into a mould for cold press molding;
the transition layer is made of Fe50 wt%, Mn4 wt% and Cu in balance, and the transition layer is formed by cold pressing after being uniformly mixed;
arranging a transition layer with the thickness of 1.5mm on the inner side of the diamond tool bit subjected to cold press molding, connecting the diamond tool bit and the transition layer together through hot-pressing sintering, and grinding the diamond tool bit through a grinding wheel abrasive belt to manufacture the diamond tool bit with the transition layer; the hot-pressing sintering temperature is 820 ℃ and the pressure is 320kg/cm2And the holding time is 200 seconds.
(3) Laser welding:
placing the diamond tool bit at the corresponding position around the substrate according to the drawing requirements, and adjusting the light spot of the laser welding machine to the tool bitStarting a laser welding machine to weld at a proper position of the base body, so that the cutter head and the base body are welded together at the moment of laser penetration; the welding process parameters are as follows: by using CO2Carrying out double-sided laser welding by a laser, wherein the diameter of a laser spot is 0.4mm, the laser power is 720W, and the welding speed is 12 mm/s; the protective gas is argon, the flow of the protective gas is 0.5L/min, the defocusing amount is 1.5mm, the laser beam deflects to one side of the substrate, the offset is 0.25mm, and the laser incidence angle is 15 degrees. The width of the welding seam is 1.4mm, and the penetration depth is 2.5 mm.
(4) And grinding the tool bit working surface of the welded diamond saw blade by using a grinding wheel to expose the diamond, and grinding by using a 120-mesh abrasive belt in a grinding machine until the surface of the base body is bright. And finally, detecting the welding strength of each diamond tool bit, and printing, packaging and warehousing after the welding strength is qualified.
The bending strength of the laser welding line is 2125MPa and is greater than that of the matrix, the matrix is broken during testing, and the welding line is intact.
Example 2:
the embodiment is a preparation method of a laser welding diamond saw blade for cutting reinforced concrete, which comprises the following specific processes:
(1) processing a matrix:
carrying out laser cutting on the steel plate to obtain a matrix shape, and then carrying out heat treatment: oil quenching at 860 deg.c for 10-15 min and tempering at 480 deg.c for 2-5 hr; leveling and polishing for later use.
(2) Preparing a diamond tool bit:
2.5kg of copper powder, 4.0kg of iron, 0.4kg of nickel, 0.9kg of manganese, 0.5kg of tin and 1.5kg of tungsten carbide are put into a mixing barrel to be mixed for 30 minutes, 0.05kg of liquid paraffin and 0.15kg of diamond are added, and the materials are mixed for 3 hours. Pouring the mixed powder into a mould for cold press molding;
the transition layer is made of Fe50 wt%, Mn4 wt% and Cu in balance, and the transition layer is formed by cold pressing after being uniformly mixed;
arranging a transition layer with the thickness of 1.5mm on the inner side of the diamond tool bit subjected to cold press molding, connecting the diamond tool bit and the transition layer together through hot-pressing sintering, and grinding the diamond tool bit through a grinding wheel abrasive belt to manufacture the diamond tool bit with the transition layer; the hot-pressing sintering temperature is 820 ℃ and the pressure is 320kg/cm2And the holding time is 200 seconds.
(3) Laser welding:
placing a diamond tool bit on a corresponding position around a base body according to the drawing requirements, adjusting the light spot of a laser welding machine to a position where the tool bit and the base body are suitable, and starting a laser welding machine for welding to enable the tool bit and the base body to be welded together at the moment of laser penetration; the welding process parameters are as follows: by using CO2Carrying out double-sided laser welding by a laser, wherein the diameter of a laser spot is 0.4mm, the laser power is 720W, and the welding speed is 12 mm/s; the protective gas is argon, the flow of the protective gas is 0.5L/min, the defocusing amount is 1.5mm, the laser beam deflects to one side of the substrate, the offset is 0.25mm, and the laser incidence angle is 15 degrees. The width of the welding seam is 1.4mm, and the penetration depth is 2.5 mm.
(4) And grinding the tool bit working surface of the welded diamond saw blade by using a grinding wheel to expose the diamond, and grinding by using a 120-mesh abrasive belt in a grinding machine until the surface of the base body is bright. And finally, detecting the welding strength of each diamond tool bit, and printing, packaging and warehousing after the welding strength is qualified.
The bending strength of the laser welding line is 2120MPa higher than that of the substrate, and the substrate is broken and the welding line is intact.

Claims (10)

1. The utility model provides a laser welding diamond saw bit of cutting reinforced concrete which characterized in that: the laser welding diamond saw blade comprises a circular base body and a diamond tool bit welded on the outer edge of the base body, wherein: the diamond tool bits are uniformly distributed on the outer circumference of the substrate, V-shaped grooves are formed between every two adjacent diamond tool bits, and arc-shaped grooves I extend into the substrate; the outer end face of the diamond tool bit is designed into a long city tooth structure.
2. The laser-welded diamond saw blade for cutting reinforced concrete according to claim 1, wherein: the great wall tooth structure of the diamond tool bit means that a plurality of U-shaped grooves are designed on the outer end face of the diamond tool bit, and the number of the U-shaped grooves on each diamond tool bit is 4-6.
3. The laser-welded diamond saw blade for cutting reinforced concrete according to claim 1, wherein: the center of the substrate is provided with a mounting hole for mounting the diamond saw blade on a cutting machine; still be equipped with cooling hole and arc wall II on the base member, arc wall II sets up between mounting hole and arc wall I, the quantity of arc wall II equals with the quantity of arc wall I.
4. The laser-welded diamond saw blade for cutting reinforced concrete according to claim 3, wherein: one end of each arc-shaped groove II is positioned between every two adjacent arc-shaped grooves I, the other end of each arc-shaped groove II extends towards the direction of the mounting hole, and the other end of each arc-shaped groove II is in a hook shape; 2-5 cooling holes are arranged between two adjacent arc-shaped grooves II.
5. The laser-welded diamond saw blade for cutting reinforced concrete according to claim 1, wherein: the material of the substrate is 30CrMo, the tool bit contains diamond, the diamond granularity is 30/40, 40/50 or 50/60, and the compressive strength is 25-40 kg.
6. The laser-welded diamond saw blade for cutting reinforced concrete according to claim 5, wherein: the diamond tool bit comprises the following raw materials in parts by weight:
14-35 parts of copper, 22-46 parts of iron, 2-7 parts of tin, 2-10 parts of nickel, 4-17 parts of manganese, 11-19 parts of tungsten carbide, 0.1-0.7 part of liquid paraffin and 1.0-2.2 parts of diamond.
7. The laser-welded diamond saw blade for cutting reinforced concrete according to claim 1, wherein: the diamond tool bit comprises the following raw materials in parts by weight:
17-29 parts of copper, 27-41 parts of iron, 4-7 parts of tin, 4-8 parts of nickel, 9-15 parts of manganese, 13-17 parts of tungsten carbide, 0.2-0.6 part of liquid paraffin and 1.1-1.8 parts of diamond.
8. The laser-welded diamond saw blade for cutting reinforced concrete according to claim 1, wherein: the diamond tool bit comprises the following raw materials in parts by weight:
25 parts of copper, 40 parts of iron, 5 parts of tin, 7 parts of nickel, 9 parts of manganese, 17 parts of tungsten carbide, 0.3 part of liquid paraffin and 1.2 parts of diamond.
9. The process for preparing a laser-welded diamond saw blade for cutting reinforced concrete according to claim 6, wherein: the process comprises the following steps:
(1) processing a matrix:
the steel plate is subjected to laser cutting to form a matrix shape, and then is subjected to heat treatment, wherein the heat treatment process comprises the following steps: oil quenching at 865-880 deg.C for 10-15 min, and tempering at 450-500 deg.C for 2-5 hr; carrying out conventional leveling and polishing after heat treatment for later use;
(2) preparing a diamond tool bit:
uniformly mixing the raw materials of the diamond tool bit in proportion, and performing cold press molding; mixing the transition layer raw materials and then performing cold press molding; arranging a transition layer with the thickness of 1-2mm on the inner side of the diamond tool bit subjected to cold press molding, connecting the diamond tool bit and the transition layer together through hot-pressing sintering, and grinding the diamond tool bit through a grinding wheel abrasive belt to manufacture the diamond tool bit with the transition layer; the hot-pressing sintering temperature is 800-840 ℃, and the pressure is 300-380 kg/cm2Keeping the temperature for 120-300 seconds;
(3) laser welding:
placing a diamond tool bit on a corresponding position around a base body according to the drawing requirements, adjusting the light spot of a laser welding machine to a position where the tool bit and the base body are suitable, and starting a laser welding machine for welding to enable the tool bit and the base body to be welded together at the moment of laser penetration; the welding process parameters are as follows: by using CO2Carrying out double-sided laser welding by a laser, wherein the diameter of a laser spot is 0.4mm, the laser power is 700-750W, and the welding speed is 10-14 mm/s; the protective gas is argon, the flow of the protective gas is 0.5L/min, the defocusing amount is 1.2-1.6mm, the laser beam deflects to one side of the substrate, the offset is 0.2-0.3mm, and the laser incidence angle is 12-15 degrees. The width of the welding seam is 1-1.5mm, and the penetration depth is 2-2.6 mm;
(4) and grinding the tool bit working surface of the welded diamond saw blade by using a grinding wheel to expose the diamond, and grinding by using a 120-mesh abrasive belt in a grinding machine until the surface of the base body is bright.
10. The process for preparing a laser-welded diamond saw blade for cutting reinforced concrete according to claim 9, wherein: the transition layer has the chemical composition as follows: 45-60 wt.% of Fe, 2-5 wt.% of Mn and the balance of Cu.
CN202010579555.1A 2020-06-23 2020-06-23 Laser welding diamond saw blade for cutting reinforced concrete and preparation process thereof Pending CN111906944A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115415945A (en) * 2022-09-28 2022-12-02 江苏锋泰工具有限公司 Pure dry type diamond grinding disc and manufacturing method thereof
CN115740459A (en) * 2022-11-21 2023-03-07 泉州市华兴超硬工具有限公司 High-precision diamond saw blade production process
CN117444212A (en) * 2023-10-27 2024-01-26 江苏华昌工具制造有限公司 Milling cutter wheel special for stone and preparation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115415945A (en) * 2022-09-28 2022-12-02 江苏锋泰工具有限公司 Pure dry type diamond grinding disc and manufacturing method thereof
CN115415945B (en) * 2022-09-28 2024-03-19 江苏锋泰工具有限公司 Pure dry diamond grinding disc and manufacturing method thereof
CN115740459A (en) * 2022-11-21 2023-03-07 泉州市华兴超硬工具有限公司 High-precision diamond saw blade production process
CN117444212A (en) * 2023-10-27 2024-01-26 江苏华昌工具制造有限公司 Milling cutter wheel special for stone and preparation method thereof

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