Diamond cutter head and manufacturing process thereof

Abstract

The invention discloses a diamond tool head, which is formed by sintering a plurality of layers of cold pressed blanks, the cold pressed blanks are composed of a working layer and a welding layer, diamond particles are evenly and orderly arranged on the surface of the working layer, the working layer is formed by matrix powder and diamond particles, the matrix powder is composed of the following components by weight percentage: pre-alloyed powder FeCuCo: 10-30%, pre-alloyed powder FeNiCo: 20-40%, pre-alloyed powder CuSn: 20-40%, Co: 3-10%; the matrix powder of the welding layer is composed of the following components by weight percentage: pre-alloyed powder FeCuCo: 70-90%; Co: 10-30%. The invention can make the utilization efficiency of the diamond tool head higher, the sharpness is increased by 30% compared with ordinary products, and the service life is increased by 25%.

Description

Technical Field

[0001] The invention relates to the technical field of diamond saw blades, and in particular to a diamond cutter head and a manufacturing process thereof. Background Art

[0002] Diamond saw blade is a cutting tool, widely used in the processing of hard and brittle materials such as concrete, refractory materials, food materials, ceramics, etc. Diamond saw blades are generally composed of diamond segments and substrates. The substrate is the main supporting part connecting the diamond segments, while the diamond segments are the cutting parts during use. The diamond segments and substrates are mainly welded by silver welding or laser welding. Diamond particles are wrapped inside the segments and will be continuously consumed during use, while the substrate will not.

[0003] In the process of using diamond saw blades, users pay more and more attention to their work efficiency. There are two main aspects to measure the quality of diamond saw blades: one is sharpness, and the other is the service life of diamond saw blades. If the cutting is not sharp enough, the diamond blade is easy to fall off, the cutting strength is low, and the cutting efficiency is low. Moreover, the diamond particles of general products do not need to be arranged, and the distribution is uneven, so the diamonds cannot be fully utilized.

[0004] Therefore, the inventor conducted further research and developed a diamond tool head and a manufacturing process thereof, which resulted in the present invention. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a diamond cutter head and a manufacturing process thereof, which can greatly improve the sharpness and service life of the diamond cutter head.

[0006] To solve the above technical problems, the technical solution of the present invention is:

[0007] A diamond tool head is formed by sintering a plurality of layers of cold pressed blanks, wherein the cold pressed blanks consist of a working layer and a welding layer, wherein diamond particles are evenly and orderly arranged on the surface of the working layer, and the working layer is formed by matrix powder and diamond particles, wherein the matrix powder consists of the following components by weight percentage: pre-alloyed powder FeCuCo: 10-30%, pre-alloyed powder FeNiCo: 20-40%, pre-alloyed powder CuSn: 20-40%, and Co: 3-10%; the matrix powder of the welding layer consists of the following components by weight percentage: pre-alloyed powder FeCuCo: 70-90%; and Co: 10-30%.

[0008] Furthermore, the diamond particles are arranged vertically along the cutting edge direction of the diamond bit.

[0009] Furthermore, two adjacent rows of diamond particles are arranged in a staggered manner.

[0010] Furthermore, the particle size of the diamond particles is 35 / 40 mesh, and the diamond concentration is 10% to 30%.

[0011] Furthermore, the pre-alloyed powder FeCuCo is prepared by a chemical method, and the specific composition ratio is Fe: 30-55%, Cu: 10-35%, Co: 10-35%.

[0012] Furthermore, the pre-alloyed powder FeNiCo is prepared by electrolysis, and the specific composition ratio is Fe: 70-85%, Ni: 14-25%, Co: 1-5%.

[0013] Furthermore, the pre-alloyed powder CuSn is prepared by an atomization method, and the specific composition ratio is: Cu: 80-90%, Sn: 10-20%.

[0014] Further, it is sintered from 4 to 7 layers of cold pressed green sheets.

[0015] A diamond tool head manufacturing process comprises the following steps:

[0016] Step 1: Use the automatic cold pressing process to press the working layer and the welding layer into a cold pressed blank at one time;

[0017] Step 2: Press the diamond particles evenly and orderly on the surface of the working layer;

[0018] Step 3: Press and sinter multiple layers of cold pressed blanks to form a single-tooth cutter head.

[0019] Furthermore, in step 1, the cold pressing pressure is 3-5 tons / square centimeter, and the length and width of the cold pressed blank must be 0.1-0.3 mm smaller than the length and width of the sintered cutter head.

[0020] After adopting the above scheme, the present invention has the following advantages:

[0021] 1. Diamond particles are arranged in a template and combined with a special material ratio to make diamonds more efficient, with a 30% sharper edge and 25% longer service life than ordinary products.

[0022] 2. The present invention is provided with a welding layer, which is conducive to welding with the base of the diamond saw blade. Moreover, the use of the welding layer greatly reduces the production cost compared with the prior art in which the diamond cutter head is directly welded with the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of a cold pressed blank of the present invention;

[0024] Figure 2 is a side view of a cold pressed blank of the present invention;

[0025] Figure 3It is a schematic diagram of assembling a plurality of layers of cold pressed blanks into a single-tooth cutter head according to the present invention;

[0026] Figure 4 It is a schematic diagram of the present invention being applied to a diamond saw blade.

[0027] Description of symbols

[0028] Welding layer 1 Working layer 2 Diamond particles 3

[0029] Diamond saw blade 90 Diamond segment 901 Base 902 DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The present invention discloses a diamond tool head, such as Figure 1 , Figure 2 and Figure 3 As shown, it is a preferred embodiment of the present invention, which is formed by sintering multiple layers of cold pressed blanks, the cold pressed blanks are composed of a working layer 2 and a welding layer 1, and the diamond particles 3 are evenly and orderly arranged on the surface of the working layer 2.

[0031] The working layer 2 is formed by matrix powder and diamond particles 3, wherein the matrix powder is composed of the following components by weight percentage: pre-alloyed powder FeCuCo: 10-30%, pre-alloyed powder FeNiCo: 20-40%, pre-alloyed powder CuSn: 20-40%, Co: 3-10%; the matrix powder of the welding layer is composed of the following components by weight percentage: pre-alloyed powder FeCuCo: 70-90%; Co: 10-30%. In the present invention, the powder cost is reduced by about 50% by using FeCuCo and FeNiCo alloys instead of Co powder, and at the same time, the sintering stability and cutting performance of the product are also improved.

[0032] like Figure 4 As shown, the present invention is applied to a diamond saw blade 90 , and the diamond saw blade 90 includes a diamond segment 901 and a substrate 902 . The diamond segment 901 and the substrate 902 are welded together through a welding layer 1 .

[0033] like Figure 4 As shown, the diamond particles 3 are arranged vertically along the cutting edge of the diamond bit 901, which is conducive to full utilization of the diamond particles 3. Figure 3 As shown, two adjacent rows of diamond particles 3 are staggered, and the diamond particles 3 in the staggered arrangement are more effectively utilized.

[0034] Furthermore, the particle size of the diamond particles 3 is 35 / 40 mesh, and the diamond concentration is 10% to 30%. A concentration of 100% means that the diamond carat number per unit volume of the cutter head is 0.88.

[0035] Further, the pre-alloyed powder FeCuCo is produced by chemical method, and the specific composition ratio is Fe: 30-55%, Cu: 10-35%, Co: 10-35%. Further, the pre-alloyed powder FeNiCo is produced by electrolysis method, and the specific composition ratio is Fe: 70-85%, Ni: 15-25%, Co: 1-4%. Further, the pre-alloyed powder CuSn is produced by atomization method, and the specific composition ratio is: Cu: 75-95%, Sn: 10-25%.

[0036] Furthermore, the diamond cutter head 901 is formed by sintering 4 to 7 layers of cold pressed blanks. The diamond particles 3 are evenly and orderly arranged in each tooth of the diamond cutter head 901 by using a special arrangement process.

[0037] Embodiment: A diamond tool head manufacturing process, step 1: the cold pressed blank is composed of a working layer 2 and a welding layer 1, the working layer 2 is formed by matrix powder and diamond particles 3, the particle size of the diamond particles 3 is 35 / 40 mesh, the diamond concentration is 30%, and the matrix powder is composed of the following components by weight percentage: pre-alloyed powder FeCuCo: 30%, pre-alloyed powder FeNiCo: 40%, pre-alloyed powder CuSn: 20%, Co: 10%; wherein the pre-alloyed powder FeCuCo is made by a chemical method, and the specific composition ratio is Fe: 50%, Cu: 25%, Co: 25%, the pre-alloyed powder FeNiCo is made by an electrolytic method, and the specific composition ratio is Fe: 80%, Ni: 18%, Co: 2%, and the pre-alloyed powder CuSn is made by an atomization method, and the specific composition ratio is: Cu: 85%, Sn: 15%. The automatic cold pressing process is used to press the working layer 2 and the welding layer 1 into a cold pressed blank at one time. The cold pressing pressure is controlled at 3-5 tons / square centimeter. The length and width of the cold pressed blank must be 0.1-0.3mm smaller than the length and width of the sintered cutter head.

[0038] Step 2: Use the mold dispensing method to arrange the diamond particles evenly and orderly on the surface of the working layer; Figure 3 As shown, the diamond particles are arranged vertically along the cutting edge of the diamond bit, in a staggered arrangement between two adjacent rows of diamond particles.

[0039] Step 3: Press and sinter 7 layers of cold pressed blanks to form a one-tooth cutter head.

[0040] The laser welding wall saw products made with the above production process and powder ratio have been tested in Austria and have a 30% higher sharpness and 25% longer life than conventional products. The specific test parameters and data are as follows:

[0041] The aggregate proportions of the concrete blocks to be cut are shown in the table below. The dimensions of the concrete blocks are length, width and height: 1500x 1000x300mm; steel bar diameter: 30mm; number of steel bars: 30.

[0042]

[0043] Cutting parameters and test data are as follows:

[0044] Wall saw power: 22KW

[0045] Reinforced concrete sheet diameter: Φ800mm Blade size: 20*4.7*13.5mm Number of teeth: 80

[0046] Rotation speed / Linear speed: 1000RPM / 41.8m / s

[0047] Cutting efficiency: 34cm 2 / min, 7 minutes (cutting a piece of 100*30cm, the blade consumes 0.25mm), wall saw life: 12m 2 / Each saw blade (consumable head height: 0.83mm / m 2 )

[0048] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any changes or modifications made according to the claims and description of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A diamond tool segment, characterized in that: It is sintered by multiple layers of cold pressed blanks. The cold pressed blanks are composed of working layers and welding layers. Diamond particles are evenly and orderly arranged on the surface of the working layer. The working layer is formed by matrix powder and diamond particles. The matrix powder is composed of the following components by weight percentage: pre-alloyed powder FeCuCo: 10-30%, pre-alloyed powder FeNiCo: 20-40%, pre-alloyed powder CuSn: 20-40%, Co: 3-10%; The matrix powder of the welding layer is composed of the following components by weight percentage: pre-alloyed powder FeCuCo: 70-90%; Co: 10-30%; The pre-alloyed powder FeCuCo is made by chemical method, and the specific composition ratio is Fe: 30-55%, Cu: 10-35%, Co: 10-35%; the pre-alloyed powder FeNiCo is made by electrolysis method, and the specific composition ratio is Fe: 70-85%, Ni: 14-25%, Co: 1-5%; the pre-alloyed powder CuSn is made by atomization method, and the specific composition ratio is: Cu: 80-90%, Sn: 10-20%; The diamond particles are arranged vertically along the cutting edge of the diamond bit; two adjacent rows of diamond particles are arranged in a staggered manner; the particle size of the diamond particles is 35 / 40 mesh, and the diamond concentration is 10% to 30%.

2. A diamond tool head according to claim 1, characterized in that: It is made by sintering 4 to 7 layers of cold pressed billets.

3. A process for manufacturing a diamond tool segment as claimed in claim 1, characterized in that: The following steps are involved: Step 1: Use the automatic cold pressing process to press the working layer and the welding layer into a cold pressed blank at one time; Step 2: Press the diamond particles evenly and orderly on the surface of the working layer; Step 3: Press and sinter multiple layers of cold pressed blanks to form a single-tooth cutter head.

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