Arrow-shaped slotted saw blade and its manufacturing method

Abstract

The present invention relates to an arrow-shaped grooved tooth welded saw blade, and relates to the technical field of diamond tools. The arrow-shaped grooved tooth welded saw blade of the present invention comprises a disc steel base, a plurality of diamond bits are welded and fixed on the edge of the outer periphery of the disc steel base, a plurality of arrow-shaped grooves are provided on the front and rear surfaces of the diamond bits, the side walls of the arrow-shaped grooves are perpendicularly arranged to the front and rear surfaces of the diamond bits, and the distance between the corresponding positions of adjacent arrow-shaped grooves is at least twice the width of the arrow-shaped grooves. The present invention designs the diamond bits into the shape of specific arrow-shaped grooves, so that the saw blade can complete cutting more smoothly, and can improve cutting efficiency and reduce wear ratio when the cutting machine is cutting concrete pavement and other materials at high speed. It is particularly suitable for the construction of new concrete pavement expansion joints, wall wire troughs, and floor heating troughs and other application places.

Description

Technical Field

[0001] The present invention relates to the technical field of diamond tools, and more particularly to an arrow-shaped groove-toothed welded saw blade and a preparation method thereof. Background Art

[0002] In today's rapidly developing economy, low-carbon and environmental protection have become the general trend. Infrastructure construction cannot do without diamond saw blades. Due to the increase in labor costs and consumables costs during the pouring of concrete pavements and engineering construction, the need to develop energy-saving and efficient cutting tools is becoming more and more urgent. Summary of the Invention

[0003] In order to solve the above technical problems existing in the prior art, the purpose of the present invention is to provide a high-efficiency and energy-saving arrow-shaped grooved tooth welded saw blade and a preparation method thereof.

[0004] The arrow-grooved welded saw blade of the present invention comprises a disc steel base, a plurality of diamond segments are welded and fixed on the edge of the outer periphery of the disc steel base, and a chip groove adjacent to the gap between the adjacent diamond segments is provided on the disc steel base between adjacent diamond segments; the characteristic is that a plurality of arrow-shaped grooves are provided on the front and rear surfaces of the diamond segments, the side walls of the arrow-shaped grooves are arranged perpendicular to the front and rear surfaces of the diamond segments, and the distance between corresponding positions of adjacent arrow-shaped grooves is at least twice the width of the arrow-shaped grooves.

[0005] The arrow-shaped groove is formed by two adjacent straight grooves, and the angle between the two straight grooves is 45° to 90°.

[0006] The width and depth of the two straight grooves are the same, and the width of the straight groove is defined as the width of the adjacent arrow-shaped grooves.

[0007] Wherein, the depth of the arrow-shaped groove is 1 / 5 to 1 / 10 of the thickness of the diamond bit.

[0008] Wherein, the arrow-shaped groove on the front surface and the arrow-shaped groove on the rear surface are symmetrically arranged.

[0009] Wherein, the arrow-shaped groove on the front surface and the arrow-shaped groove on the rear surface are arranged at intervals.

[0010] Wherein, the number of the diamond segments is 6 to 20.

[0011] Wherein, the diamond bit is welded on the edge of the outer periphery of the disc steel substrate by laser.

[0012] The present invention also provides a method for preparing the above-mentioned arrow-shaped grooved tooth welded saw blade, comprising the following steps:

[0013] 1. Matrix preparation:

[0014] Prepare the disc steel base and grind it smooth;

[0015] 2. Diamond Segment Preparation:

[0016] The diamond particles and the metal binder are mixed, loaded into a mold, and then cold-pressed to obtain a diamond segment blank having a plurality of arrow-shaped grooves on the front and rear surfaces; the diamond segment blank is hot-pressed and sintered to obtain the diamond segment;

[0017] 3. Welding forming:

[0018] Arranging diamond segments at corresponding positions around the disc steel substrate, and welding the diamond segments and the disc steel substrate together by welding;

[0019] 4. Polishing, painting and inspection:

[0020] Use a grinding wheel to grind the working surface of the diamond bit, and use a grinder to grind the surface of the disc steel base. Perform a welding strength test on each diamond bit. If it fails, it will be reworked. If it passes, the surface will be painted and dried.

[0021] The present invention also provides an application of the above-mentioned arrow-shaped grooved tooth welded saw blade, which is used for opening or cutting concrete pavement.

[0022] Compared with the prior art, the arrow-shaped slotted saw blade and its preparation method of the present invention have the following beneficial effects:

[0023] The present invention designs the diamond cutter head into the shape of specific arrow-shaped groove teeth. During the cutting process, the cutter head can form spaced concave and convex surfaces, which reduces the contact area between the cutter head and the cutting material and reduces the cutting resistance. In addition, the design of adjacent arrow-shaped grooves can fully exert the heat dissipation and heat transfer capabilities while ensuring cutting stability, so that the saw blade can complete the cutting more smoothly. When the cutting machine is cutting materials such as concrete pavements at high speed, it can improve the cutting efficiency and reduce the wear ratio. It is particularly suitable for the construction of new concrete pavement expansion joints, wall wire troughs, floor heating troughs and other application places. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the planar structure of the arrow-shaped grooved tooth welded saw blade of the present invention. DETAILED DESCRIPTION

[0025] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in exact proportions. They are only used to facilitate and clearly illustrate the purpose of the embodiments of the present invention.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] like Figure 1As shown, the arrow-shaped slotted-tooth welded saw blade of the present invention comprises a circular steel base 10, with multiple diamond segments 20 fixed to the outer edge of the circular steel base 10 via laser welding. The diameter of the circular steel base 10 can be designed to be 100 mm to 300 mm as required, and the number of diamond segments 20 ranges from 6 to 20. Chip flutes 15 are provided on the circular steel base 10 between adjacent diamond segments 20, adjacent to the gaps between them. A mounting hole 11 is provided in the center of the circular steel base 10. The front and rear surfaces of the diamond bit 20 are provided with a plurality of arrow-shaped grooves 21. In the present invention, the sidewalls of the arrow-shaped grooves 21 are perpendicular to the front or rear surface of the diamond bit 20. This vertical arrangement can better reduce cutting resistance and improve cutting sharpness. Moreover, the distance between the corresponding positions of adjacent arrow-shaped grooves is at least twice the width of the arrow-shaped grooves, which can ensure stability under high-speed cutting conditions when the arrow-shaped grooves are arranged vertically. The above structural design can remove the high heat generated by the cutting head and the material during high-speed cutting, thereby maintaining the sharpness of the diamond bit. In the present invention, the arrow-shaped groove is formed by two adjacent straight grooves, and the angle between the two straight grooves is 45° to 90°. This arrangement can optimize and utilize the heat dissipation and heat transfer capabilities of the arrow-shaped grooves, allowing the saw blade to complete cutting more smoothly and ensure cutting effect. In the arrow-shaped groove 21, the width and depth of the two straight grooves are the same, and the width of the straight groove is defined as the width of the adjacent arrow-shaped grooves. In the present invention, the depth of the arrow-shaped groove is 1 / 5 to 1 / 10 of the thickness of the diamond bit. The arrow-shaped groove on the front surface and the arrow-shaped groove on the rear surface can be symmetrically arranged, and the depth of the arrow-shaped groove can be designed to be, for example, 1 / 10 of the thickness of the diamond bit. In addition, the arrow-shaped groove on the front surface and the arrow-shaped groove on the rear surface can also be spaced apart, and the depth of the arrow-shaped groove can be designed to be, for example, 1 / 5 of the thickness of the diamond bit. In the present invention, a plurality of heat dissipation hole arrays 12 are provided on the disc steel substrate 10, and the heat dissipation hole array 12 is close to the outer circular area of the disc steel substrate 10. During the cutting process, the outer circular area is closer to the diamond bit, which can better increase the air flow rate to dissipate heat. During high-speed cutting, the disc steel substrate will not heat up, soften and deform due to excessive heat accumulation, thereby improving safety.

[0028] The manufacturing process of the arrow groove tooth welding saw blade of the present invention is as follows:

[0029] 1. Matrix processing

[0030] According to the drawing requirements, the steel plate is quenched, heat treated, tempered, laser cut into shape, tempered, surface ground, inner hole ground, outer circle ground, and deburred;

[0031] 2. Diamond Segment Preparation

[0032] According to the specific use requirements, metal binder, porogen (liquid paraffin) and diamond particles are selected and mixed evenly, and then a diamond cutter segment blank with arrow-shaped groove teeth on the surface is obtained by cold pressing, hot pressing and sintering, and grinding with a grinding wheel and belt to produce a diamond cutter segment;

[0033] 3. Laser welding

[0034] Place the cutter head and the base together on the base position according to the drawing requirements, adjust the light spot of the laser welding machine to the appropriate position of the cutter head and the base, start the laser welding machine to weld the cutter head and the base together at the moment the laser penetrates, and then 2 Strength standard: Each diamond cutter head is tested for welding strength;

[0035] 4. Polishing, painting and inspection

[0036] After welding, the laser welding saw blade with arrow teeth is first sandblasted on the inner side of the blade head, and then the working surface of the diamond blade is polished with a grinding wheel to expose the diamond. After welding, the laser welding saw blade with arrow teeth is polished with a grinder to make the base surface bright, and then the blade is polished with a grinding wheel at 600N / mm 2 Each diamond cutter head is tested for safety welding strength according to strength standards. If it fails, it will be reworked. If it passes, it will be surface-painted and dried to prevent surface rust. Finally, it will be silk-screened, laser-marked, packaged, and put into storage.

[0037] The arrow groove tooth welded saw blade of the present invention is suitable for drilling and cutting reinforced concrete walls, as well as cutting and maintaining engineering bridges (maintaining new concrete pavements, walls, floor slab grooving, renovation of old concrete pavements, etc.).

[0038] Example 1

[0039] like Figure 1As shown, the blank is quenched and heat treated, tempered, and laser cut according to the requirements of the drawing to obtain a disc steel base blank with a mounting hole in the center and a diameter of 300 mm. 15 chip grooves and a heat dissipation hole array are processed on the outer edge of the disc steel base, tempered, plane ground, inner hole ground, outer circle ground, and burrs removed; 2.75 kg of copper powder, 3.85 kg of iron, 0.5 kg of nickel, 1.2 kg of cobalt, 0.4 kg of tin, and 1.3 kg of rare earth alloy are taken and put into a mixing barrel and mixed for 30 minutes, and then 0.08 kg of liquid paraffin and 0.2 kg of diamond are added. After continuing to mix for 4 hours, the powder is poured into a mold and cold pressed into shape. Three identical arrow-shaped grooves are symmetrically arranged on the front and rear surfaces of the obtained blank. The arrow-shaped groove is formed by two adjacent straight grooves. The angle between the two straight grooves is 75°, the distance between the corresponding positions of adjacent arrow-shaped grooves is 3 times the width of the arrow-shaped groove, and the depth is 1 / 10 of the thickness of the diamond bit. Then hot pressing sintering was carried out at a temperature of 720°C and a pressure of 350 kg / cm 2 , the heat preservation time is 100 seconds, then use the grinding wheel and belt to grind the cutter head, put the cutter head and the substrate together on the corresponding substrate position according to the drawing requirements, adjust the light spot of the laser welding machine to the appropriate position of the cutter head and the substrate, start the laser welding machine to weld the cutter head and the substrate together at the moment of laser penetration, at a speed of 600N / mm 2 The strength standard is to test the welding strength of each diamond cutter head, and then use high-frequency welding to protect the teeth. After welding, the arrow tooth laser welding saw blade is polished with a grinder to make the base surface bright, and then the working surface of the diamond cutter head is polished with a grinding wheel to expose the diamond, and then the surface is sprayed with paint and dried to prevent the surface from rusting. Finally, the saw blade is polished with a grinding wheel to make the diamond face bright. 2 The welding strength of each diamond cutter head is tested according to the strength standard. If it fails, it will be reworked. If it passes, the surface will be painted and dried to prevent the surface from rusting. Finally, it will be silk-screened, laser marked, packaged and put into storage.

[0040] Example 2

[0041] The blank was quenched and heat treated, tempered, and laser cut according to the drawing requirements to obtain a disc steel base blank with a mounting hole in the center and a diameter of 300 mm. 15 chip grooves and a heat dissipation hole array were machined on the outer edge of the disc steel base, tempered, plane ground, inner hole ground, outer circle ground, and burrs removed. 2.55 kg of copper powder, 3.8 kg of iron, 0.6 kg of nickel, 1.35 kg of cobalt, 0.40 kg of tin, and 1.4 kg of rare earth alloy were taken and put into a mixing barrel and mixed for 30 minutes. Then, 0.06 kg of liquid paraffin and 0.17 kg of diamond were added. After continuing to mix for 4 hours, the powder was poured into a mold and cold pressed. Three identical arrow-shaped grooves were symmetrically arranged on the front and rear surfaces of the obtained blank. The arrow-shaped grooves were formed by two adjacent straight grooves. The angle between the two straight grooves was 75°. The distance between the corresponding positions of adjacent arrow-shaped grooves was 3 times the width of the arrow-shaped groove, and the depth was 1 / 10 of the thickness of the diamond bit. Then hot pressing sintering was carried out at a temperature of 720°C and a pressure of 350 kg / cm 2 , the heat preservation time is 100 seconds, then use the grinding wheel and belt to grind the cutter head, put the cutter head and the substrate together on the corresponding substrate position according to the drawing requirements, adjust the light spot of the laser welding machine to the appropriate position of the cutter head and the substrate, start the laser welding machine to weld the cutter head and the substrate together at the moment of laser penetration, at a speed of 600N / mm 2 The strength standard is to test the welding strength of each diamond cutter head, and then use high-frequency welding to protect the teeth. After welding, the arrow tooth laser welding saw blade is polished with a grinder to make the base surface bright, and then the working surface of the diamond cutter head is polished with a grinding wheel to expose the diamond, and then the surface is sprayed with paint and dried to prevent the surface from rusting. Finally, the saw blade is polished with a grinding wheel to make the diamond face bright. 2 The welding strength of each diamond cutter head is tested according to the strength standard. If it fails, it will be reworked. If it passes, the surface will be painted and dried to prevent the surface from rusting. Finally, it will be silk-screened, laser marked, packaged and put into storage.

[0042] Comparative Example 1

[0043] Compared with Example 1, the difference is that the sidewall of the arrow-shaped groove designed in Comparative Example 1 is an inclined transition sidewall, and the distance between two corresponding points of adjacent arrow-shaped grooves is 1.5 times the width of the arrow-shaped groove.

[0044] Comparative Example 2

[0045] Compared with Example 1, the difference is that the grooves on the front surface and the rear surface designed in Comparative Example 2 are designed to be straight grooves with one end inclined, and the angle between the straight groove and the diameter direction is 30°.

[0046] Comparative Example 3

[0047] Compared with Example 2, the difference is that the angle between the two straight grooves in the arrow-shaped groove designed in Comparative Example 3 is 135°.

[0048] Examples 1-2 and Comparative Examples 1-3 were tested according to the JB / T3235-1999 method for measuring the wear ratio of artificial diamond sintered bodies. The results are recorded in Table 1.

[0049] Table 1

[0050] Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 <![CDATA[Wear ratio (×10 4 )]]> 1.36 1.23 1.09 0.96 0.99

[0051] For ordinary technicians in this field, the specific embodiments are only illustrative descriptions of the present invention. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the scope of protection of the present invention.

Claims

1. An arrow-shaped slotted saw blade comprising a circular steel base, a plurality of diamond segments welded and fixed to the outer periphery of the circular steel base, and a chip removal groove provided on the circular steel base between adjacent diamond segments, adjacent to the gaps between the adjacent diamond segments; characterized in that: A plurality of arrow-shaped grooves are provided on the front and rear surfaces of the diamond bit, the side walls of the arrow-shaped grooves are arranged perpendicular to the front and rear surfaces of the diamond bit, and the distance between corresponding positions of adjacent arrow-shaped grooves is at least twice the width of the arrow-shaped grooves; the arrow-shaped grooves are formed by two adjacent straight grooves, and the angle between the two straight grooves is 45° to 90°; the width and depth of the two straight grooves are the same, and the width of the straight groove is defined as the width of the adjacent arrow-shaped grooves; the depth of the arrow-shaped groove is 1 / 5 to 1 / 10 of the thickness of the diamond bit.

2. The arrow-shaped slotted saw blade according to claim 1, characterized in that: The arrow-shaped groove on the front surface and the arrow-shaped groove on the rear surface are symmetrically arranged.

3. The arrow-shaped slotted saw blade according to claim 1, characterized in that: The arrow-shaped grooves on the front surface and the arrow-shaped grooves on the rear surface are arranged at intervals.

4. The arrow-shaped slotted saw blade according to claim 1, characterized in that: The number of the diamond segments is 6 to 20.

5. The arrow-shaped slotted saw blade according to claim 1, characterized in that: The diamond segments are welded to the edge of the outer periphery of the disc steel substrate by laser welding.

6. The method for preparing the arrow-shaped slotted saw blade according to any one of claims 1 to 5, characterized in that The following steps are involved:

1. Matrix preparation: Prepare the disc steel base and grind it smooth; 2. Diamond Segment Preparation: The diamond particles and the metal binder are mixed, loaded into a mold, and then cold-pressed to obtain a diamond segment blank having a plurality of arrow-shaped grooves on the front and rear surfaces; the diamond segment blank is hot-pressed and sintered to obtain the diamond segment; 3. Welding forming: Arranging diamond segments at corresponding positions around the disc steel substrate, and welding the diamond segments and the disc steel substrate together by welding; 4. Polishing, painting and inspection: Use a grinding wheel to grind the working surface of the diamond bit, and use a grinder to grind the surface of the disc steel base. Perform a welding strength test on each diamond bit. If it fails, it will be reworked. If it passes, the surface will be painted and dried.

7. Application of the arrow-shaped grooved tooth welded saw blade according to any one of claims 1 to 5, characterized in that For openings or cuts in concrete pavement.

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