CN105252448A - Manufacturing process for dry grinding diamond grinding wheel - Google Patents
Manufacturing process for dry grinding diamond grinding wheel Download PDFInfo
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- CN105252448A CN105252448A CN201510707511.1A CN201510707511A CN105252448A CN 105252448 A CN105252448 A CN 105252448A CN 201510707511 A CN201510707511 A CN 201510707511A CN 105252448 A CN105252448 A CN 105252448A
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- impregnated wheel
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Abstract
The invention discloses a manufacturing process for a dry grinding diamond grinding wheel and belongs to the technical field of grinding tools for building materials. The diamond grinding wheel comprises a grinding wheel base body and diamond tool bits arranged on the grinding wheel base body. The manufacturing process of the diamond grinding wheel includes the steps that the diamond tool bits are formed by evenly mixing raw material powder and then carrying out hot pressed sintering on the powder; the diamond tool bits and the grinding wheel base body are welded into a whole through a brazing process to form the diamond grinding wheel, wherein the process parameters of thermal pressing and sintering are the sintering temperature ranging from 670 DEG C to 730 DEG C, the pressure ranging from 150 kg/cm<2> to 250 kg/cm<2> and the temperature maintaining time ranging from 1 minute to 2 minutes, and the brazing process parameters are the brazing temperature ranging from 700 DEG C to 780 DEG C and the brazing time ranging from 10 seconds to 15 seconds. By the adoption of the manufacturing process, the mechanical performance of the tool bits is improved and the effective grinding effect can be better achieved in the dry grinding process; and meanwhile the specific brazing process is adopted, so that the combination strength of the tool bits and the base body meets the actual requirement.
Description
Technical field
The present invention relates to construction material grinding tool technical field, be specifically related to a kind of preparation technology of diamond-impregnated wheel of dry grinding, prepared emery wheel is mainly used in the grinding process of construction material (concrete, armored concrete etc., cobblestone ground) and Decorative Building Stone.
Background technology
Diamond-impregnated wheel is the one in diamond tool, mainly be applicable to the flat surface grinding processing process of all kinds of refractory surface, product adopts structure of mounting hole, is easy to handling, have processing flatness good, grinding efficiency is high, life-span advantages of higher, is applicable to all domestic and imported equipment for grinding.
Diamond-impregnated wheel comprises diamond segment and abrasive wheel substrate, in grinding process, when angle grinding machine is when running up, because the material of polishing mostly is irregularly shaped, in bruting process, emery wheel is easy to fierce collision occurs with material, the gravel that polishing produces and dust etc. can not be got rid of again in time, damage cutter head further, and Long-Time Service causes cutter head grinding performance to decline and cutter head profile loses accuracy.Therefore, improve the mechanical performance of tool tip material and the bond strength of cutter head and abrasive wheel substrate most important for realizing efficient polishing operation.
Summary of the invention
The object of the present invention is to provide a kind of preparation technology of diamond-impregnated wheel of dry grinding, prepared its cutter head obdurability of diamond-impregnated wheel is good, and together with welding tie by specific soldering processes and abrasive wheel substrate, cutter head and abrasive wheel substrate weld strength high, efficient polishing operation and cutter head service life can be realized.
For achieving the above object, the technical solution adopted in the present invention is as follows:
Dry grind the preparation technology of diamond-impregnated wheel, and described diamond-impregnated wheel comprises abrasive wheel substrate and is located at the diamond segment on abrasive wheel substrate; The preparation process of this diamond-impregnated wheel is: described diamond segment, after being mixed by raw material powder, makes through Thermocompressed sintering and forming; By soldering processes, described diamond segment and abrasive wheel substrate are welded as a whole again, make diamond-impregnated wheel.
In the preparation process of this diamond-impregnated wheel, the technological parameter of described hot pressed sintering is: sintering temperature is 670 ~ 730 DEG C, pressure 150 ~ 250kg/cm
2, temperature retention time 1 ~ 2 minute.
In the preparation process of this diamond-impregnated wheel, in soldering processes, cored solder used is silver soldering sheet; Described brazing process parameter is: brazing temperature 700-780 DEG C, holding time 10-15 second.
In the preparation process of this diamond-impregnated wheel, the chemical composition of diamond segment raw materials is (wt.%): copper 30-34%, iron 32-42%, nickel 5-10%, cobalt 10-21%, tin 1.0-1.5%, paraffin 0.10-0.15, rare earth element 1.0-2.1%, diamond 1.0-2.4%; Or, consisting of (wt.%) of diamond segment raw materials: copper 27-32%, iron 35-40%, nickel 4-9%, cobalt 14-20%, tin 8-11%, paraffin 0.10-0.15, rare earth element 1.3-2.0%, diamond 1.4-2.1%; Or the chemical composition of diamond segment raw materials is (wt.%): copper 25-30%, iron 25-30%, nickel 5-8%, cobalt 24-30%, tin 7-10%, paraffin 0.10-0.15, rare earth element 1.5-2.2%, diamond 1.7-2.5%.
The present invention prepares in the raw material powder of diamond segment, and the particle size range of diamond dust used is 30-50 order (as 30/40 order, 40/45 order or 45/50 order), compression strength 30kg.
The present invention prepares in the raw material powder of diamond segment, and described rare earth element is one or more in La, Ce and Y.
Tool of the present invention has the following advantages and beneficial effect:
1, the present invention is by adding Sn, rare earth element etc. preparing in cutter head raw material, and controls diamond dust granularity, and each element synergy makes cutter head mechanical performance improve, can better effective grinding in dry milled process.
2, the present invention adopts specific soldering processes, makes cutter head and substrate combinating strength practical requirement.
Accompanying drawing explanation
Fig. 1 is that the present invention dry grinds diamond-impregnated wheel structural representation;
Fig. 2 is that the present invention dry grinds A-A face sectional view in diamond-impregnated wheel structural representation.
In figure: 1-abrasive wheel substrate; 2-diamond segment; 3-square through hole; 4-axis hole.
Detailed description of the invention
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
The present invention is the preparation technology of dry grinding diamond-impregnated wheel, as shown in Figure 1-2, and the diamond segment 2 that described diamond-impregnated wheel comprises abrasive wheel substrate 1 and is located on abrasive wheel substrate 1; Its preferred frame mode is as follows:
Described abrasive wheel substrate 1 is designed to discoid, and the outward flange of abrasive wheel substrate 1 is planar annular; Described diamond segment 2 is multiple, is uniformly distributed on the planar annular of abrasive wheel substrate; The center of described discoid abrasive wheel substrate is provided with the axis hole 4 for fixing abrasive wheel substrate.
Described diamond segment is that the round pie structure of square through hole 3 is offered at middle part, and the planar annular of abrasive wheel substrate simultaneously offers circular radiating hole, circular radiating hole to offer position corresponding with the position of square through hole 3 on each diamond segment.
The multiple through hole of area distribution on described discoid abrasive wheel substrate between axis hole and planar annular, for discharging grinding waste material.
When angle grinding machine is when running up, because the material of polishing is all much out-of-shape, in bruting process, emery wheel is easy to fierce collision occurs with material, cutter head outward flange is designed to the probability that fillet better can weaken collision, square opening is made in the centre of cutter head simultaneously, communicate with circular hole on matrix, can make the gravel in bruting process, dust can be got rid of in time from the porus excretorius of cutter head; By to matrix optimal design, cutter head hole and matrix louvre can well form convection current, accelerate gas circulation, accelerate heat radiation and keep emery wheel cutter head can not be overheated and cause mill to work.The thermal diffusivity that effective solution diamond matrix is good in bruting process.
The preparation process of above-mentioned diamond-impregnated wheel is: described diamond segment, after being mixed by raw material powder, makes through Thermocompressed sintering and forming; By soldering processes, described diamond segment and abrasive wheel substrate are welded as a whole again, make diamond-impregnated wheel; The concrete preparation process of following examples is as follows:
(1) matrix processing: according to drawing requirement, Vehicle Processing, the required matrix of cutting;
(2) sinter molding of diamond segment sheet:
According to concrete instructions for use, choose the raw material copper of required formula, iron, nickel, cobalt, tin, phosphorus (or carbon), atoleine and diamond, cold moudling is passed through after mixing, hot pressed sintering, emery wheel belt sanding prepares diamond segment, its hot pressed sintering temperature is 670 ~ 730 DEG C, pressure 150 ~ 250kg/cm
2, temperature retention time 1 ~ 2 minute.
(3) soldering processes:
Cutter head is placed in matrix location corresponding by drawing together to silver soldering sheet, adjusts welding position heating and melting silver soldering sheet, cutter head and matrix are welded together, then with 600N/mm
2strength criterion carries out weld strength detection to each diamond segment; Wherein brazing process parameter is: brazing temperature 700-780 DEG C, holding time 10-15 second; Silver soldering sheet chemical composition used is (wt.%): silver 12.0%, copper 31.2%, phosphorus 4.8%, tin 1.5%, titanium 1.0% and surplus zinc.
(4) polish, spray paint, check:
Dry type diamond-impregnated wheel sand-blasting machine after welding is removed the matrix surface oxide skin of welding and causing, then uses the working face of grinder buffing diamond segment, and diamond is come out, then surface lacquer is carried out, dry, to prevent surface oxidisation, finally with 600N/mm
2strength criterion carries out weld strength detection to each diamond segment, qualified rear printing packaging warehouse-in.
Embodiment 1
Diamond segment raw material are: copper powder 3.0kg, iron 3.8kg, nickel 0.83kg, cobalt 1.8kg, tin 0.12kg and rare earth element (Ce) 0.14kg, put into mixing tank mixed after 30 minutes, adding liquid paraffin 0.13kg and diamond (granularity 30/40 order, compression strength 30kg) 0.18kg, continue batch mixing, after 3 hours, powder is poured into cold moudling in mould, hot pressed sintering, emery wheel belt sanding cutter head, cutter head and silver soldering sheet are placed in matrix location corresponding by drawing together, adjust welding position heating and melting silver soldering sheet, cutter head and matrix are welded together, then with 600N/mm
2strength criterion carries out weld strength detection to each diamond segment, dry type diamond-impregnated wheel sand-blasting machine after welding is removed the matrix surface oxide skin of welding and causing, then with the working face of special grinding wheel polishing diamond segment, and diamond is come out, then surface lacquer is carried out, dry, to prevent surface oxidisation, finally with 600N/mm
2strength criterion carries out weld strength detection to each diamond segment, qualified rear printing packaging warehouse-in.
In the present embodiment, hot-pressing sintering technique parameter is: hot pressed sintering temperature is 685 DEG C, pressure 200kg/cm
2, temperature retention time 1 ~ 2 minute; Brazing process parameter is: brazing temperature 750 DEG C, holding time 10-15 second.
Comparative example 1
Difference from Example 1 is: diamond segment raw material are respectively: A fills a prescription: copper powder 3.0kg, iron 3.8kg, nickel 0.83kg, cobalt 1.8kg, tin 0.12kg, rare earth element (Ce) 0.35kg, atoleine 0.13kg and diamond 0.18kg.
B fills a prescription: copper powder 3.0kg, iron 3.8kg, nickel 0.83kg, cobalt 1.8kg, tin 0.12kg, rare earth element (Ce) 0.05kg, atoleine 0.13kg and diamond 0.18kg.
Embodiment 2
Diamond segment raw material are: copper powder 2.7kg, iron 3.6kg, nickel 0.7kg, cobalt 1.6kg, tin 1.0kg and rare earth element 0.14kg, put into mixing tank mixed after 30 minutes, adding liquid paraffin 0.11kg and diamond (granularity 40/45 order, compression strength 30kg) 0.15kg, continue batch mixing, after 3 hours, powder is poured into cold moudling in mould, hot pressed sintering, emery wheel belt sanding cutter head, cutter head and silver soldering sheet are placed in matrix location corresponding by drawing together, adjust welding position heating and melting silver soldering sheet, cutter head and matrix are welded together, then with 600N/mm
2strength criterion carries out weld strength detection to each diamond segment, dry type diamond-impregnated wheel sand-blasting machine after welding is removed the matrix surface oxide skin of welding and causing, then with the working face of special grinding wheel polishing diamond segment, and diamond is come out, then surface lacquer is carried out, dry, to prevent surface oxidisation, finally with 600N/mm
2strength criterion carries out weld strength detection to each diamond segment, qualified rear printing packaging warehouse-in.
In the present embodiment, hot-pressing sintering technique parameter is: hot pressed sintering temperature is 678 DEG C, pressure 200kg/cm
2, temperature retention time 1 ~ 2 minute; Brazing process parameter is: brazing temperature 740 DEG C, holding time 10-15 second.
Comparative example 2
Difference from Example 2 is: brazing process parameter is: brazing temperature 650 DEG C, holding time 10-15 second.
Embodiment 3
Diamond segment raw material are: copper powder 2.8kg, iron 2.75kg, nickel 0.58kg, cobalt 2.5kg, tin 0.98kg, rare earth element 0.21kg, put into mixing tank mixed after 30 minutes, adding liquid paraffin 0.12kg and diamond (granularity 45/50 order, compression strength 30kg) 0.18kg, continue batch mixing, after 3 hours, powder is poured into cold moudling in mould, hot pressed sintering, emery wheel belt sanding cutter head, cutter head and silver soldering sheet are placed in matrix location corresponding by drawing together, adjust welding position heating and melting silver soldering sheet, cutter head and matrix are welded together, then with 600N/mm
2strength criterion carries out weld strength detection to each diamond segment, dry type diamond-impregnated wheel sand-blasting machine after welding is removed the matrix surface oxide skin of welding and causing, then with the working face of special grinding wheel polishing diamond segment, and diamond is come out, then surface lacquer is carried out, dry, to prevent surface oxidisation, finally with 600N/mm
2strength criterion carries out weld strength detection to each diamond segment, qualified rear printing packaging warehouse-in.
In the present embodiment, hot-pressing sintering technique parameter is: hot pressed sintering temperature is 670 DEG C, pressure 200kg/cm
2, temperature retention time 1 ~ 2 minute; Brazing process parameter is: brazing temperature 745 DEG C, holding time 10-15 second.
Diamond segment measuring mechanical property data prepared by above-described embodiment 1-3 see the following form 1, wherein, diamond segment bending strength test: by the diamond segment of 40mm × 5mm × 5mm being placed directly on two bearings of 30mm of being separated by, power is given in the middle of interval, until sample fracture, test bending strength; Wear resistance ratio measures according to JB3/T3235-1999.As can be seen from table 1 data, each embodiment cutter head mechanical performance is excellent, is conducive to improving the grinding quality in grinding operation and cutter head life-span.
Diamond-impregnated wheel cutter head prepared by above-described embodiment 1-3 and substrate combinating strength test result see the following form 1, as can be seen from table 1 data, after cutter head adopts new material, by optimizing brazing process parameter, the bond strength of cutter head and matrix reaches standard, can meet instructions for use.
Table 1
Claims (10)
1. dry grind the preparation technology of diamond-impregnated wheel, it is characterized in that: described diamond-impregnated wheel comprises abrasive wheel substrate and is located at the diamond segment on abrasive wheel substrate; The preparation process of this diamond-impregnated wheel is: described diamond segment, after being mixed by raw material powder, makes through Thermocompressed sintering and forming; By soldering processes, described diamond segment and abrasive wheel substrate are welded as a whole again, make diamond-impregnated wheel.
2. the preparation technology of dry grinding diamond-impregnated wheel according to claim 1, is characterized in that: the technological parameter of described hot pressed sintering is: sintering temperature is 670 ~ 730 DEG C, pressure 150 ~ 250kg/cm
2, temperature retention time 1 ~ 2 minute.
3. the preparation technology of dry grinding diamond-impregnated wheel according to claim 1, is characterized in that: in described soldering processes, cored solder used is silver soldering sheet.
4. the preparation technology of dry grinding diamond-impregnated wheel according to claim 3, is characterized in that: described brazing process parameter is: brazing temperature 700-780 DEG C, holding time 10-15 second.
5. the preparation technology of dry grinding diamond-impregnated wheel according to claim 1, it is characterized in that: weight percentage, the chemical composition of diamond segment raw materials is: copper 30-34%, iron 32-42%, nickel 5-10%, cobalt 10-21%, tin 1.0-1.5%, rare earth element 1.0-2.1%, paraffin 0.10-0.15, diamond 1.0-2.4%.
6. the preparation technology of dry grinding diamond-impregnated wheel according to claim 1, it is characterized in that: weight percentage, consisting of of diamond segment raw materials: copper 27-32%, iron 35-40%, nickel 4-9%, cobalt 14-20%, tin 8-11%, rare earth element 1.3-2.0%, paraffin 0.10-0.15, diamond 1.4-2.1%.
7. the preparation technology of dry grinding diamond-impregnated wheel according to claim 1, it is characterized in that: weight percentage, the chemical composition of diamond segment raw materials is: copper 25-30%, iron 25-30%, nickel 5-8%, cobalt 24-30%, tin 7-10%, rare earth element 1.5-2.2%, paraffin 0.10-0.15, diamond 1.7-2.5%.
8., according to the preparation technology of the arbitrary described dry grinding diamond-impregnated wheel of claim 5-7, it is characterized in that: prepare in the raw material powder of diamond segment, the particle size range of diamond dust used is 30-50 order, compression strength 30kg.
9. the preparation technology of dry grinding diamond-impregnated wheel according to claim 8, is characterized in that: the particle size range of diamond dust used is 30/40 order, 40/45 order or 45/50 order.
10., according to the preparation technology of the arbitrary described dry grinding diamond-impregnated wheel of claim 5-7, it is characterized in that: prepare in the raw material powder of diamond segment, described rare earth element is one or more in La, Ce and Y.
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| CN105690282A (en) * | 2016-04-22 | 2016-06-22 | 丹阳市剑庐工具有限公司 | Annular tooth dividing grinding wheel and preparation process thereof |
| CN105751087A (en) * | 2016-05-05 | 2016-07-13 | 珠海市巨海科技有限公司 | Ceramic metal bonding agent grinding tool and manufacturing method thereof |
| CN109551386A (en) * | 2018-12-20 | 2019-04-02 | 江苏友美工具有限公司 | Multifunctional mill cuts diamond-impregnated wheel |
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| CN105690282A (en) * | 2016-04-22 | 2016-06-22 | 丹阳市剑庐工具有限公司 | Annular tooth dividing grinding wheel and preparation process thereof |
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| CN109571291A (en) * | 2018-12-20 | 2019-04-05 | 江苏友美工具有限公司 | Multifunctional mill cuts diamond-impregnated wheel and its preparation process |
| CN109551386B (en) * | 2018-12-20 | 2024-02-06 | 江苏友美工具有限公司 | Multifunctional diamond grinding wheel for grinding and cutting |
| CN109822465A (en) * | 2019-03-14 | 2019-05-31 | 泉州众志金刚石工具有限公司 | A kind of tile edge Metal Substrate emery wheel material |
| CN111775341A (en) * | 2019-09-05 | 2020-10-16 | 江苏锋泰工具有限公司 | Composite diamond saw blade for ceramic cutting and preparation method thereof |
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| CN110919880A (en) * | 2019-11-21 | 2020-03-27 | 江苏华昌工具制造有限公司 | Tooth-protecting porous laser welding sheet and preparation process thereof |
| CN114571197A (en) * | 2022-04-15 | 2022-06-03 | 青岛科技大学 | Novel method for protecting welding part of sintered diamond saw blade for wet cutting |
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