CN101628389A - Method for grinding plane of TC17 titanium alloy - Google Patents
Method for grinding plane of TC17 titanium alloy Download PDFInfo
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- CN101628389A CN101628389A CN200810150365A CN200810150365A CN101628389A CN 101628389 A CN101628389 A CN 101628389A CN 200810150365 A CN200810150365 A CN 200810150365A CN 200810150365 A CN200810150365 A CN 200810150365A CN 101628389 A CN101628389 A CN 101628389A
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Abstract
The invention relates to a method for grinding a plane of a TC17 titanium alloy. The method is characterized in that: a common surface grinding machine is adopted, and a grinding wheel of single alundum and medium soft hardness grade of ceramic bond is selected; process dosage in grinding comprises that: the speed of the grinding wheel is between 25 and 30m/s, the speed of a workbench is between 12 and 15mm/min, and the grinding depth is between 0.015 and 0.020mm; grinding fluid is injected into a grinding region in grinding; and the grinding fluid is vulcanized fatty oil which is obtained by adding 15 percent of extreme-pressure additive containing sulfur chemical elements into 85 percent of number 10 engine oil. The method for grinding the plane of the TC17 titanium alloy selects the single alundum grinding wheel of the ceramic bond, adopts high-efficiency extreme-pressure grinding oil, selects proper process dosage in grinding, improves grinding ratio, grinding quality and grinding efficiency of grinding the plane of the TC17 titanium alloy, reduces processing cost, improves the surface quality of a TC17 titanium alloy workpiece, reduces scuffing and burning of the surface, and improves the reliability of the workpiece.
Description
Technical field
The present invention relates to a kind of method of TC17 titanium alloy flat surface grinding, belong to the process of TC17 titanium alloy flat surface grinding, relate to the emery wheel of TC17 titanium alloy flat surface grinding and selecting for use of grinding fluid and technological parameter.
Background technology
The TC17 titanium alloy has premium properties such as specific strength height, hear resistance and good corrosion resistance, each industrial circle particularly aerospace field obtain more and more widely application.But the thermal conductivity of titanium alloy is low, elastic modelling quantity is little, chemism is high, is a kind of typical difficult-to-machine material.Though titanium alloy has good performance, maximum shortcoming is a processing difficulties, the processing charges height, and grinding is more difficult, though grinding can obtain degree of precision, because the ins and outs of titanium alloy have determined very difficulty of titanium alloy grinding.Abrasion of grinding wheel is serious during grinding, easy rust, and grinding ratio is also lower; Produce simultaneously easily problems such as harmful tension and serious surface tear, burn on the surface.And existing titanium alloy grinding technology mainly concentrates on the exploitation of technologies such as slow feeding to titanium alloy, sbrasive belt grinding, low-stress grinding.The grinding dosage of creep feed grinding titanium alloy is: speed of grinding wheel 30mm/s, grinding depth 1-2mm, work speed 70mm/min, its weak point is to need to adopt diamond roller that emery wheel is carried out continuous automatic dressing compensation in grinding process, and to adopt high-pressure high-flow flushing cooling, truer and cooling system complexity only are fit to form grinding.The grinding dosage of sbrasive belt grinding titanium alloy is: speed of grinding wheel 25-28mm/s, grinding depth 0.04-0.08mm, work speed 4-6mm/min; Its weak point is that equipment is different from grinding machine, and the workpiece of main grinding complex profile only limits to titanium alloy workpiece is carried out polishing processing, can not be used for thick fine finishining.The grinding dosage of low-stress grinding titanium alloy is speed of grinding wheel 10-15mm/s, work speed 12-30mm/min, still, the production efficiency of low-stress grinding titanium alloy is low, and want to use suitable cutting fluid fully in a large number, only when the surface of the work integrality is had relatively high expectations, just adopt.Certainly, the technology of titanium alloy flat surface grinding is arranged also aborning, its grinding dosage is: speed of grinding wheel 15-20mm/s, grinding depth 0.025mm, speed of table 8-14mm/min; Used emery wheel is cubic boron nitride abrasive wheel and skive, but this emery wheel costs an arm and a leg, and makes processing cost too high; And existing grinding fluid is to use sodium nitrite solution, natrium nitrosum is a kind of hypotoxicity material, generate nitrosamine with organic amine, very unfavorable to human body, the process of existing flat surface grinding is the grinding at titanium alloy commonly used simultaneously, and the process of this titanium alloy flat surface grinding of TC17 also is not suitable for.
The TC17 titanium alloy has good performance, but maximum shortcoming is a processing difficulties, processing charges height, grinding are more difficult, and especially the contact area of emery wheel and workpiece is big during flat surface grinding, caloric value is big during grinding, and the thermal conductivity of titanium alloy is low, and under identical grinding condition, the grinding temperature of titanium alloy is about 1.5-2 times of No. 45 steel, heating is easy to generate warpage and burn during grinding, has a strong impact on the workpiece crudy.Go back the concrete quantitative suitable process of neither one at present for the technological parameter of TC17 titanium alloy flat surface grinding.Because it is improper that technological parameter medium plain emery wheel speed, the speed of table, grinding depth and grinding fluid and emery wheel are selected, exist in the TC17 titanium alloy grinding that grinding force is big, grinding temperature is high, the grinding process medium plain emery wheel easily bonds obstruction and the grinding quality of loss, surface of the work is difficult for guaranteeing, cause surface of the work problem such as scuffing or burn easily, make quality and the production efficiency that is difficult to improve TC17 titanium alloy flat surface grinding aborning, processing cost also be difficult to reduce.
Summary of the invention
The technical problem that solves
For fear of the deficiencies in the prior art part, the present invention proposes a kind of method of TC17 titanium alloy flat surface grinding, can improve grinding ratio, grinding quality and the grinding efficiency of TC17 titanium alloy flat surface grinding, cut down finished cost, improve TC17 titanium alloy workpiece surface quality, reduce surface tear and burn, improve the reliability of workpiece.
Technical scheme
A kind of method of TC17 titanium alloy flat surface grinding is characterized in that: adopt the common plane grinding machine, select the single alundum of vitrified bond, the emery wheel of middle soft hardness grade for use; Technology consumption in the grinding is: speed of grinding wheel is 25-30m/s, and the speed of table is 12-15mm/min, and grinding depth is 0.015-0.020mm; In the grinding grinding fluid is injected grinding area; Described grinding fluid is the sulfide fat oil that has added the EP agent of 15% sulfur-bearing chemical element in 85% No. 10 machine oil.
The grinding wheel graininess of the single alundum emery wheel of described vitrified bond adopts No. 60.
Add man-hour, adopt individual particle diamond truer trimming wheel for the finishing of emery wheel, the finishing consumption is: the finishing degree of depth is 0.005-0.02mm, and feed speed is 0.02-0.08mm/r.
Described trimming wheel carries out the light finishing of 1-2 not penetration of a cutting tool.
Beneficial effect
The method of the TC17 titanium alloy flat surface grinding that the present invention proposes is selected the single alundum emery wheel of vitrified bond for use, and bonding is few during grinding TC17 titanium alloy, and emery wheel also is difficult for stopping up.Adopt efficient extreme pressure grinding oil, its main component is No. 10 machine oil, in order to form firm lubricating film at surface of the work, has added the sulfide fat oil of the EP agent of sulfur-bearing chemical element in No. 10 machine oil, has formed the extreme pressure grinding oil.Select the technology consumption in the suitable grinding, improved grinding ratio, grinding quality and the grinding efficiency of TC17 titanium alloy flat surface grinding, cut down finished cost, improved TC17 titanium alloy workpiece surface quality, reduced surface tear and burn, improved the reliability of workpiece.
The specific embodiment
Now in conjunction with the embodiments the present invention is further described:
First step: select emery wheel
During flat surface grinding TC17 titanium alloy, the abrasive particle top will produce bonding with being ground titanium alloy, and grinding force is changed, and bonding is the Main physical phenomenon of grinding TC17 titanium alloy, and grinding process is had appreciable impact.The present invention selects the single alundum GD60AZR1 emery wheel of vitrified bond for use, and bonding is few during grinding TC17 titanium alloy, and emery wheel also is difficult for stopping up.Vitrified bond single alundum emery wheel is canescence, and its each particle all is six side's monocrystal that nature forms basically, and is free from foreign meter in the crystal; has multangular cutting edge; under same grinding force effect, formed moment is less than other abrasive material, so it is not easy to break broken; mechanical strength is higher; individual particle compression strength is 22～38kg, because it has higher hardness and toughness, cutting power is stronger; heating is lacked during grinding, can be used to the big difficult grind materials of toughness such as machining titanium alloy.Mostly the single alundum abrasive particle is spherical polyhedral monocrystalline, seldom produces the unexpected fragmentation of single abrasive particle in the grinding, and good grinding is arranged, and the surface of the work grinding scratches obviously and reduces.The chemical stability of vitrified bond is good, to keeping grinding wheel shape favourable.Grinding wheel graininess adopts about No. 60, and the variation of its grinding temperature of the emery wheel of this granularity and grinding force is little.Emery wheel hardness is meant the emery wheel complexity that comes off of abrasive particle under external force.Emery wheel is really up to the mark, the abrasive particle difficult drop-off of blunt, and emery wheel easily stops up, and grinding force is increased, and the grinding heat increases, and reduce grinding efficiency, and workpiece is burnt easily; If emery wheel is soft excessively, emery wheel is depleted again easily, uses the Soft grinding wheel grinding titanium alloy, and grinding force and grinding temperature are all low than with hard wheel grinding titanium alloy the time, according to the character of TC17 titanium alloy, select other emery wheel of middle soft durometer (ZR1) level for use.
Second step: the finishing of emery wheel
Bonding is serious during titanium alloy grinding, abrasion of grinding wheel is very fast, for acutance and the correct surface configuration of maintenance of recovering emery wheel, the present invention adopts individual particle diamond truer trimming wheel, the finishing consumption is: the finishing degree of depth is 0.005-0.02mm, feed speed is 0.02-0.08mm/r, adopt less finishing consumption, the new abrasive particle cutting edge that finishing is come out is arranged in wheel face subtly, also to carry out the light finishing of 1-2 not penetration of a cutting tool simultaneously, smooth smooth to guarantee the wheel face after the finishing, to improving TC17 titanium alloy workpiece surface quality, reduce surface tear and burn very favourable.Should use a large amount of grinding fluids to cast directly in the contact zone of emery wheel and individual particle diamond truer during trimming wheel as far as possible.
Third step: grinding fluid
During grinding, in high-speed cutting and the swiping of grinding area owing to abrasive particle, make it to produce high temperature, this temperature tends to cause burned work-surface, and causes the heavy wear of emery wheel, result that the precision of workpiece and surface integrity are worsened.Therefore, must inject grinding area to grinding fluid to reduce grinding temperature during grinding.Because grinding fluid has lubricated, cooling and cleaning function, and is very useful to wearing and tearing, obstruction and the grinding quality that improves emery wheel.Grinding fluid of the present invention adopts efficient extreme pressure grinding oil, and its main component is No. 10 machine oil, in order to form firm lubricating film at surface of the work, has added the sulfide fat oil of the EP agent of sulfur-bearing chemical element in No. 10 machine oil, has formed the extreme pressure grinding oil.The EP agent of sulfur-bearing is at 700 ℃-800 ℃ and workpiece material chemically reactive, the sulfide film that generates, at high temperature survivable, can be under the high temperature about 1000 ℃, still keep its lubricity, the adhesion and the chemical reaction that can also suppress titanium and abrasive material effectively, this grinding oil uniform liquid that is translucent, exclusion and mechanical admixture, be used for the grinding of the higher and TC17 titanium alloy material of grinding temperature, compare with sodium nitrite solution with common sulfurized oil, this grinding oil has excellent lubrication, infiltration, cleaning, heat conduction and anti-adhesion ability.
The 4th step: grinding process consumption
For grinding ratio, grinding quality and the grinding efficiency that improves TC17 titanium alloy flat surface grinding, cut down finished cost, improve TC17 titanium alloy workpiece surface quality, reduce surface tear and burn, must the appropriate grinding process consumption of selecting flat surface grinding TC17 titanium alloy.
1. speed of grinding wheel
When adopting the MM7120 surface grinding machine, speed of grinding wheel is about 30m/s.
When adopting the MM7140 surface grinding machine, speed of grinding wheel is 25m/s.
Speed of grinding wheel influences grinding force and grinding temperature.Increase speed of grinding wheel, grinding temperature raises, and grinding force descends, but the titanium alloy surface residual tension increases, and grinding ratio descends.Grinding ratio is one of important indicator of evaluation material grinding, and it has reflected the grindability of material and the quality of grinding wheel performance.Grinding ratio is big more, shows that grinding is easy more to carry out, and workpiece surface quality is good, and abrasion of grinding wheel is little, the production efficiency height, and from this angle, during flat surface grinding TC17 titanium alloy, speed of grinding wheel is unsuitable too high and low excessively, and the present invention is preferably about 30m/s.
2. the speed of table
When adopting the MM7120 surface grinding machine, the speed of table is 12mm/min.
When adopting the MM7140 surface grinding machine, the speed of table is 15mm/min.
In the grinding dosage parameter, work speed is to influence surface roughness R
zBe worth big or small principal element, directly influence the surface quality of workpiece.Increase along with work speed, workpiece surface roughness reduces, but the undeformed chip thickness of every abrasive particle increases, thereby grinding force increases, grinding temperature raises, therefore, during TC17 titanium alloy flat surface grinding, work speed should not be got too little or too big, consider the surface quality and the grinding temperature of grinding, the speed of table of the present invention should be 12m/min.
3. grinding depth
When adopting the MM7120 surface grinding machine, grinding depth is 0.015mm.
When adopting the MM7140 surface grinding machine, grinding depth is 0.020mm.
Grinding depth increases, and the undeformed chip thickness of single abrasive particle is increased, and also makes the Grinding Contact arc length lengthening of emery wheel and workpiece, and the work abrasive particle number of Can Jiaing increases simultaneously, and grinding temperature is increased, and grinding force also increases; When grinding depth increased, residual tension also increased, and grinding ratio also reduces, and considers TC17 titanium alloy grinding processability and grinding efficiency, and grinding depth of the present invention should be 0.015mm.
Claims (4)
1. the method for a TC17 titanium alloy flat surface grinding is characterized in that: adopt the common plane grinding machine, select the single alundum of vitrified bond, the emery wheel of middle soft hardness grade for use; Technology consumption in the grinding is: speed of grinding wheel is 25-30m/s, and the speed of table is 12-15mm/min, and grinding depth is 0.015-0.020mm; In the grinding grinding fluid is injected grinding area; Described grinding fluid is the sulfide fat oil that has added the EP agent of 15% sulfur-bearing chemical element in 85% No. 10 machine oil.
2. the method for TC17 titanium alloy flat surface grinding according to claim 1 and 2 is characterized in that: the grinding wheel graininess of the single alundum emery wheel of described vitrified bond adopts No. 60.
3. the method for TC17 titanium alloy flat surface grinding according to claim 1, it is characterized in that: add man-hour, adopt individual particle diamond truer trimming wheel for the finishing of emery wheel, the finishing consumption is: the finishing degree of depth is 0.005-0.02mm, and feed speed is 0.02-0.08mm/r.
4. the method for TC17 titanium alloy flat surface grinding according to claim 3 is characterized in that: described trimming wheel carries out the light finishing of 1-2 not penetration of a cutting tool.
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| CN200810150365A CN101628389A (en) | 2008-07-17 | 2008-07-17 | Method for grinding plane of TC17 titanium alloy |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104684684A (en) * | 2012-10-03 | 2015-06-03 | 福吉米株式会社 | Polishing method and method for producing alloy material |
| CN105014539A (en) * | 2015-07-16 | 2015-11-04 | 湖南大学 | Controllable quick back-forth point feeding grinding system based on grinding temperature empirical model and grinding method |
| CN106181587A (en) * | 2016-07-06 | 2016-12-07 | 西北工业大学 | In-situ authigenic type TiB2particle enhanced aluminum-based composite material grinding processing method |
| CN106897484A (en) * | 2017-01-09 | 2017-06-27 | 西北工业大学 | A kind of preparation method of the efficient low-stress grinding technological parameter of high temperature alloy |
| CN108115559A (en) * | 2017-12-18 | 2018-06-05 | 中国航发贵州黎阳航空动力有限公司 | A kind of grinding processing method of titanium alloy component |
| CN111390655A (en) * | 2020-03-31 | 2020-07-10 | 中国航发动力股份有限公司 | High-speed large-cutting-depth grinding method for mounting end face of high-pressure turbine disc |
-
2008
- 2008-07-17 CN CN200810150365A patent/CN101628389A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104684684A (en) * | 2012-10-03 | 2015-06-03 | 福吉米株式会社 | Polishing method and method for producing alloy material |
| CN105014539A (en) * | 2015-07-16 | 2015-11-04 | 湖南大学 | Controllable quick back-forth point feeding grinding system based on grinding temperature empirical model and grinding method |
| CN106181587A (en) * | 2016-07-06 | 2016-12-07 | 西北工业大学 | In-situ authigenic type TiB2particle enhanced aluminum-based composite material grinding processing method |
| CN106181587B (en) * | 2016-07-06 | 2018-02-09 | 西北工业大学 | In-situ authigenic type TiB2 particle enhanced aluminum-based composite material grinding processing methods |
| CN106897484A (en) * | 2017-01-09 | 2017-06-27 | 西北工业大学 | A kind of preparation method of the efficient low-stress grinding technological parameter of high temperature alloy |
| CN106897484B (en) * | 2017-01-09 | 2020-02-07 | 西北工业大学 | Method for obtaining high-efficiency low-stress grinding technological parameters of high-temperature alloy |
| CN108115559A (en) * | 2017-12-18 | 2018-06-05 | 中国航发贵州黎阳航空动力有限公司 | A kind of grinding processing method of titanium alloy component |
| CN111390655A (en) * | 2020-03-31 | 2020-07-10 | 中国航发动力股份有限公司 | High-speed large-cutting-depth grinding method for mounting end face of high-pressure turbine disc |
| CN111390655B (en) * | 2020-03-31 | 2021-11-09 | 中国航发动力股份有限公司 | High-speed large-cutting-depth grinding method for mounting end face of high-pressure turbine disc |
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Open date: 20100120 |