CN104043823A - Method for improving performance of diamond saw blade tool bit - Google Patents
Method for improving performance of diamond saw blade tool bit Download PDFInfo
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- CN104043823A CN104043823A CN201410291349.5A CN201410291349A CN104043823A CN 104043823 A CN104043823 A CN 104043823A CN 201410291349 A CN201410291349 A CN 201410291349A CN 104043823 A CN104043823 A CN 104043823A
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- saw blade
- diamond saw
- diamond
- tool bit
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Abstract
The invention discloses a method for improving the performance of a diamond saw blade tool bit. The method mainly includes the steps of measuring the completely-sintered diamond saw blade tool bit, calculating a resistance value, calculating a high-voltage pulse discharging voltage according to the resistance value, clamping the diamond saw blade tool bit on a high-voltage pulse discharging device through a tool bit discharging clamp to carry out slow charging for about 2 minutes, then carrying out high-voltage pulse discharging for 15 microseconds, and then carrying out air cooling; detecting the processed saw blade tool bit, and welding the qualified saw blade tool bit to saw blade base metal in a laser welding mode. The method is simple in technology, high in controllability, environmentally friendly and low in cost, and saves energy, the mechanical performance of the saw blade tool bit obtained after high-voltage pulse discharging processing is improved by more than two times, and the service life of the saw blade tool bit obtained after high-voltage pulse discharging processing is prolonged by more than two times.
Description
Technical field
The invention belongs to field of machining, particularly a kind of processing method of diamond saw blade.
Background technology
Diamond segment be take carbonado particle and metal dust and through hot pressed sintering, is formed as raw material, because there being very high interface energy between diamond particles and metal matrix, diamond particles is just mechanically embedded in metal matrix, be easy to come off, will cause like this reduction of diamond tool processing characteristics, service life to shorten.The performance that how to improve and improve diamond segment has become a key issue urgently to be resolved hurrily in engineering practice.
For the problem that how to improve the diamond saw blade life-span, carried out many-sided research work both at home and abroad, but mainly research is being launched in the aspects such as saw blade tip chemical composition proportioning, sintering process, because these methods all adopt similar alloy powder and sintering process, the indexs such as its price, impact flexibility, wearability are difficult to reach to be taken into account, cannot meet the specific (special) requirements of diamond saw blade complex working condition, not possess good adaptability.
Summary of the invention
The object of the present invention is to provide that a kind of technique is simple, cost is low, the processing method of energy-conserving and environment-protective, raising diamond saw blade performance that controllability is strong.The present invention utilizes high pressure pulse discharge technology to process diamond saw blade, thereby improves the performance of diamond saw blade.
Technical scheme of the present invention is as follows:
(1) according to the instructions for use alloyage powder of diamond saw blade, adopt three-dimensional meal mixer to mix 2 hours, mix; The mass percent of described each composition of alloy powder is: the titanizing diamond particles of 20%-35%Co, 20%-30%Ni, 12%-21%Cu, 4%-7%Sn, 3%-5%Mn, 0.7%-1.2%Cr and 15%-25%; The granularity of the metal dusts such as described Co, Ni, Cu, Sn, Mn, Cr is 153～200 orders, and the granularity of titanizing diamond particles is 40～50 orders;
(2) according to the volume of the density of required saw blade tip and graphite jig cavity, calculate the quality that each cavity need to load powder, the about 5-8g/cm of averag density of diamond saw blade
3,
mixed metal dust is loaded in the cavity of each graphite jig, adopts small-sized hydraulic press to carry out compacting;
(3) diamond saw blade of step (2) compacting is carried out to hot pressed sintering, the technological parameter of hot pressed sintering is: pressure 20-30MPa, temperature 850-880 ℃, time 7-12min;
(4) according to the appearance and size of diamond saw blade and resistivity, calculate the resistance value of diamond saw blade,
according to resistance value, calculate the required magnitude of voltage of pulsed discharge, i.e. U=3000R; The diamond saw blade of step (3) is passed through to cutter head discharge fixture clamping to high pressure pulse discharge device, high pressure pulse discharge device is slowly charged, about 2min of charging interval, then carries out high pressure pulse discharge, and be 15us discharge time;
(5) diamond saw blade after high pressure pulse discharge processing is carried out to air cooling;
(6) finally saw blade tip is carried out to macroscopic view and detect, check and whether have the defects such as crackle and local melting, by detecting the mode of qualified saw blade tip by laser weld, be welded on saw blade mother metal.
Described cutter head discharge fixture is to consist of 3 fastening bolts identical T font copper electrode pressing plate of upper and lower two plate shapes that is fixed together a pair of, during use, unclamp fastening bolt, diamond saw blade both sides are clipped in respectively in the middle of two T font copper electrode pressing plates, tighten again fastening bolt, a T font copper electrode pressing plate connects electric discharge device positive pole, and other end T font copper electrode pressing plate connects electric discharge device negative pole.
The present invention compared with prior art tool has the following advantages:
1, simple, the energy-conserving and environment-protective of technique and controllability are strong.
2, because the present invention processes after saw blade is shaped, so can be applied to the various saw blades of variety classes and different size.
3, not only solved after diamond saw blade moulding cannot intensive treatment problem, more effective intensity and the hold to diamond particles thereof that has strengthened saw blade carcass, improves more than 2 times the service life of diamond saw blade.
4, being conducive to user and reducing costs, reduce resource and energy consumption, reduce the pollution to environment, is the effective technical way that core competitiveness improves in manufacturing enterprise.
Accompanying drawing explanation
Fig. 1 cutter head discharge fixture of the present invention simplified schematic diagram.
The specific embodiment
Embodiment 1:
According to the instructions for use alloyage powder of diamond saw blade, the mass percent of each composition of alloy powder is: 35%Co, 22%Ni, 17%Cu, 7%Sn, 3.3%Mn, 0.7%Cr, 15% titanizing diamond particles; In alloy powder, the granularity of the metal dust such as Co, Ni, Cu, Sn, Mn, Cr is 153～200 orders, and the granularity of titanizing diamond particles is 40～50 orders; Adopt three-dimensional meal mixer that the alloy powder preparing is mixed 2 hours, mix; According to the volume of the density of saw blade tip and graphite jig cavity, calculating the quality that each cavity need to load powder is 30g, mixed metal dust is loaded in the cavity of each graphite jig, adopt the compacting of small-sized hydraulic press to carry out hot pressed sintering, the technological parameter of hot pressed sintering is 20MPa, 870 ℃, 7.5min, the resistance value of calculating diamond saw blade according to the appearance and size of diamond saw blade and resistivity is 0.6 Ω, and calculating suitable pulse discharging voltage is 1800V; Diamond saw blade is passed through to cutter head discharge fixture clamping to high pressure pulse discharge device, high pressure pulse discharge device is slowly charged, charging interval 2min, then carries out high pressure pulse discharge intensive treatment, and discharge time is extremely short, is 15 μ s; Diamond saw blade after discharge process is carried out to air cooling; Saw blade tip after high pressure pulse discharge is processed carries out macroscopic view and detects, and checks and whether has the defects such as crackle and local melting; By detecting the mode of qualified saw blade tip by laser weld, be welded on saw blade mother metal, become the diamond saw flake products after strengthening.
As shown in Figure 1, described cutter head discharge fixture is to consist of 3 fastening bolts 1 identical T font copper electrode pressing plate 2 of upper and lower two plate shapes that is fixed together a pair of, during use, unclamp fastening bolt, diamond saw blade 3 both sides are added in respectively in the middle of two T font copper electrode pressing plates, tighten fastening bolt, a T font copper electrode pressing plate connects electric discharge device positive pole again, and other end T font copper electrode pressing plate connects electric discharge device negative pole.
Embodiment 2:
According to the instructions for use alloyage powder of diamond saw blade, the mass percent of each composition of alloy powder is: 31%Co, 27%Ni, 12%Cu, 6%Sn, 4.8%Mn, 1.2%Cr, 18% titanizing diamond particles; In alloy powder, the granularity of the metal dust such as Co, Ni, Cu, Sn, Mn, Cr is 153～200 orders, and the granularity of titanizing diamond particles is 40～50 orders; Adopt three-dimensional meal mixer that the alloy powder preparing is mixed 2 hours, mix; According to the volume of the density of saw blade tip and graphite jig cavity, calculating the quality that each cavity need to load powder is 34g, mixed metal dust is loaded in the cavity of each graphite jig, adopt the compacting of small-sized hydraulic press to carry out hot pressed sintering, the technological parameter of hot pressed sintering is 22MPa, 850 ℃, 10min, the resistance value of calculating diamond saw blade according to the appearance and size of diamond saw blade and resistivity is 0.7 Ω, and calculating suitable pulse discharging voltage is 2100V; Diamond saw blade clamping, to high pressure pulse discharge device, is slowly charged to high pressure pulse discharge device, and charging interval 2min, then carries out high pressure pulse discharge intensive treatment, and discharge time is extremely short, is 15 μ s; Diamond saw blade after discharge process is carried out to air cooling; Saw blade tip after high pressure pulse discharge is processed carries out macroscopic view and detects, and checks and whether has the defects such as crackle and local melting; By detecting the mode of qualified saw blade tip by laser weld, be welded on saw blade mother metal, become the diamond saw flake products after strengthening.
Embodiment 3:
According to the instructions for use alloyage powder of diamond saw blade, the mass percent of each composition of alloy powder is: 27%Co, 30%Ni, 13%Cu, 4%Sn, 5%Mn, 1%Cr, 20% titanizing diamond particles; In alloy powder, the granularity of the metal dust such as Co, Ni, Cu, Sn, Mn, Cr is 153～200 orders, and the granularity of titanizing diamond particles is 40～50 orders; Adopt three-dimensional meal mixer that the alloy powder preparing is mixed 2 hours, mix; According to the volume of the density of saw blade tip and graphite jig cavity, calculating the quality that each cavity need to load powder is 39g, mixed metal dust is loaded in the cavity of each graphite jig, adopt the compacting of small-sized hydraulic press to carry out hot pressed sintering, the technological parameter of hot pressed sintering is 25MPa, 860 ℃, 9min, the resistance value of calculating diamond saw blade according to the appearance and size of diamond saw blade and resistivity is 0.8 Ω, and calculating suitable pulse discharging voltage is 2400V; Diamond saw blade clamping, to high pressure pulse discharge device, is slowly charged to high pressure pulse discharge device, and charging interval 2min, then carries out high pressure pulse discharge intensive treatment, and discharge time is extremely short, is 15 μ s; Diamond saw blade after discharge process is carried out to air cooling; Saw blade tip after high pressure pulse discharge is processed carries out macroscopic view and detects, and checks and whether has the defects such as crackle and local melting; By detecting the mode of qualified saw blade tip by laser weld, be welded on saw blade mother metal, become the diamond saw flake products after strengthening.
Embodiment 4:
According to the instructions for use alloyage powder of diamond saw blade, the mass percent of each composition of alloy powder is: 24%Co, 20%Ni, 21%Cu, 7%Sn, 4.2%Mn, 0.8%Cr, 23% titanizing diamond particles; In alloy powder, the granularity of the metal dust such as Co, Ni, Cu, Sn, Mn, Cr is 153～200 orders, and the granularity of titanizing diamond particles is 40～50 orders; Adopt three-dimensional meal mixer that the alloy powder preparing is mixed 2 hours, mix; According to the volume of the density of saw blade tip and graphite jig cavity, calculating the quality that each cavity need to load powder is 44g, mixed metal dust is loaded in the cavity of each graphite jig, adopt the compacting of small-sized hydraulic press to carry out hot pressed sintering, the technological parameter of hot pressed sintering is 28MPa, 880 ℃, 8min, the resistance value of calculating diamond saw blade according to the appearance and size of diamond saw blade and resistivity is 0.9 Ω, and calculating suitable pulse discharging voltage is 2700V; Diamond saw blade clamping, to high pressure pulse discharge device, is slowly charged to high pressure pulse discharge device, and charging interval 2min, then carries out high pressure pulse discharge intensive treatment, and discharge time is extremely short, is 15 μ s; Diamond saw blade after discharge process is carried out to air cooling; Saw blade tip after high pressure pulse discharge is processed carries out macroscopic view and detects, and checks and whether has the defects such as crackle and local melting; By detecting the mode of qualified saw blade tip by laser weld, be welded on saw blade mother metal, become the diamond saw flake products after strengthening.
Embodiment 5:
According to the instructions for use alloyage powder of diamond saw blade, the mass percent of each composition of alloy powder is: 20%Co, 25%Ni, 20%Cu, 5%Sn, 3.9%Mn, 1.1%Cr, 25% titanizing diamond particles; In alloy powder, the granularity of the metal dust such as Co, Ni, Cu, Sn, Mn, Cr is 153～200 orders, and the granularity of titanizing diamond particles is 40～50 orders; Adopt three-dimensional meal mixer that the alloy powder preparing is mixed 2 hours, mix; According to the volume of the density of saw blade tip and graphite jig cavity, calculating the quality that each cavity need to load powder is 60g, mixed metal dust is loaded in the cavity of each graphite jig, adopt the compacting of small-sized hydraulic press to carry out hot pressed sintering, the technological parameter of hot pressed sintering is 30MPa, 850 ℃, 12min, the resistance value of calculating diamond saw blade according to the appearance and size of diamond saw blade and resistivity is 1.2 Ω, and calculating suitable pulse discharging voltage is 3600V; Diamond saw blade clamping, to high pressure pulse discharge device, is slowly charged to high pressure pulse discharge device, and charging interval 2min, then carries out high pressure pulse discharge intensive treatment, and discharge time is extremely short, is 15 μ s; Diamond saw blade after discharge process is carried out to air cooling; Saw blade tip after high pressure pulse discharge is processed carries out macroscopic view and detects, and checks and whether has the defects such as crackle and local melting; By detecting the mode of qualified saw blade tip by laser weld, be welded on saw blade mother metal, become the diamond saw flake products after strengthening.
Claims (3)
1. a method that improves diamond saw blade performance, is characterized in that:
(1) according to the instructions for use alloyage powder of diamond saw blade, adopt three-dimensional meal mixer to mix 2 hours, mix; The mass percent of described each composition of alloy powder is: the titanizing diamond particles of 20%-35%Co, 20%-30%Ni, 12%-21%Cu, 4%-7%Sn, 3%-5%Mn, 0.7%-1.2%Cr and 15%-25%;
(2) according to the volume of the density of required saw blade tip and graphite jig cavity, calculate the quality that each cavity need to load powder, the about 5-8g/cm of averag density of diamond saw blade
3,
mixed metal dust is loaded in the cavity of each graphite jig, adopts small-sized hydraulic press to carry out compacting;
(3) diamond saw blade of step (2) compacting is carried out to hot pressed sintering, the technological parameter of hot pressed sintering is: pressure 20-30MPa, temperature 850-880 ℃, time 7-12min;
(4) according to the appearance and size of diamond saw blade and resistivity, calculate the resistance value of diamond saw blade,
according to resistance value, calculate the required magnitude of voltage of pulsed discharge, i.e. U=3000R; The diamond saw blade of step (3) is passed through to cutter head discharge fixture clamping to high pressure pulse discharge device, high pressure pulse discharge device is slowly charged, about 2min of charging interval, then carries out high pressure pulse discharge, and be 15us discharge time;
(5) diamond saw blade after high pressure pulse discharge processing is carried out to air cooling;
(6) finally saw blade tip is carried out to macroscopic view and detect, check and whether have the defects such as crackle and local melting, by detecting the mode of qualified saw blade tip by laser weld, be welded on saw blade mother metal.
2. the method for raising diamond saw blade performance according to claim 1, is characterized in that: the granularity of the metal dusts such as described Co, Ni, Cu, Sn, Mn, Cr is 153～200 orders, and the granularity of titanizing diamond particles is 40～50 orders.
3. the cutter head discharge fixture that the method for raising diamond saw blade performance claimed in claim 1 is used, it is characterized in that: it is to consist of 3 fastening bolts identical T font copper electrode pressing plate of upper and lower two plate shapes that is fixed together a pair of, during use, unclamp fastening bolt, diamond saw blade both sides are clipped in respectively in the middle of two T font copper electrode pressing plates, tighten again fastening bolt, a T font copper electrode pressing plate connects electric discharge device positive pole, and other end T font copper electrode pressing plate connects electric discharge device negative pole.
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| CN201410291349.5A CN104043823B (en) | 2014-06-25 | 2014-06-25 | A kind of method improving diamond saw blade performance |
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| CN201410291349.5A CN104043823B (en) | 2014-06-25 | 2014-06-25 | A kind of method improving diamond saw blade performance |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85201484U (en) * | 1985-05-18 | 1986-01-22 | 大连市机电研究所 | Automatic silica glass tube stretching and cutting device |
| CN1410590A (en) * | 2002-11-19 | 2003-04-16 | 武汉化工学院 | Method of preparing diamond and diamond like film |
| CN101352792A (en) * | 2008-07-24 | 2009-01-28 | 泉州众志金刚石工具有限公司 | Method for producing diamond tool head |
| US20100025898A1 (en) * | 2000-01-30 | 2010-02-04 | Pope Bill J | USE OF Ti AND Nb CEMENTED TiC IN PROSTHETIC JOINTS |
-
2014
- 2014-06-25 CN CN201410291349.5A patent/CN104043823B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85201484U (en) * | 1985-05-18 | 1986-01-22 | 大连市机电研究所 | Automatic silica glass tube stretching and cutting device |
| US20100025898A1 (en) * | 2000-01-30 | 2010-02-04 | Pope Bill J | USE OF Ti AND Nb CEMENTED TiC IN PROSTHETIC JOINTS |
| CN1410590A (en) * | 2002-11-19 | 2003-04-16 | 武汉化工学院 | Method of preparing diamond and diamond like film |
| CN101352792A (en) * | 2008-07-24 | 2009-01-28 | 泉州众志金刚石工具有限公司 | Method for producing diamond tool head |
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