CN104384836A - Inner surface treatment method for ceramic air cylinder of oilless compressor - Google Patents
Inner surface treatment method for ceramic air cylinder of oilless compressor Download PDFInfo
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- CN104384836A CN104384836A CN201410492116.1A CN201410492116A CN104384836A CN 104384836 A CN104384836 A CN 104384836A CN 201410492116 A CN201410492116 A CN 201410492116A CN 104384836 A CN104384836 A CN 104384836A
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- arc oxidation
- cylinder
- differential arc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
Abstract
The invention discloses an inner surface treatment method for a ceramic air cylinder of an oilless compressor. The inner surface treatment method has the following technological steps of selecting an aluminum alloy material of which the silicon content is 2%-5%; forming air cylinder blank through die casting; rolling an inner hole of the air cylinder by using an inner hobbing cutter; cleaning the air cylinder; carrying out micro-arc oxidation; putting the air cylinder in alkaline micro-arc oxidation liquid, wherein the conducted fluctuation voltage is 480-520V, the working current is 90-110A, and the micro-arc oxidation time is 13-17 minutes; increasing the working voltage to 580-620V and the working current to 115-125A by debugging, and then carrying out micro-arc oxidation for 8-12 minutes; continuously increasing the working voltage to 700-740V and the working current to 130-150A, and carrying out micro-arc oxidation for 13-17 minutes; cleaning the air cylinder; polishing the inner hole; carrying out secondary polishing; detecting and cleaning. The inner surface treatment method disclosed by the invention has the advantages that the manufacturing process is more environment-friendly, and the manufactured product has the characteristics that the surface density is high, the smoothness is good, and the service life of the product can be effectively prolonged.
Description
Technical field
The invention belongs to oilless (oil free) compressor cylinder Manufacturing Techniques field, especially relate to a kind of environmental protection and the inner surface of cylinder can be allowed to reach the oilless (oil free) compressor ceramic cylinder internal surface treatment method of high abrasion, high rigidity.
Background technology
Most of cylinders are in the market all adopt aluminium alloy or cast aluminum alloys to be that matrix material casting forms, in order to ensure that the inner wall surface of cylinder has stronger hardness and abrasion resistance, existing way is all adopt hard anodizing or plating hard chromium on surface or chemical nickel plating to increase the intensity on cylinder inner wall surface; But above-mentioned several ways are all because have harmful substances, so pollute higher in implementation process; And this hard anodizing, the plating hard chromium on surface of passing through is with the product after chemical nickel plating, its technique material hardness is low, processing pollution is large, processed complex and surface adhesion force poor, the interior mill layer life-span can be caused so shorter, have a strong impact on service life and the use value of product; Therefore be necessary to be improved.
Summary of the invention
The object of the invention is the deficiency existed for above-mentioned prior art, a kind of oilless (oil free) compressor ceramic cylinder internal surface treatment method is provided, it there is manufacturing process environmental protection and allow the product surface hardness made is high, wearability is good, and the feature that can effectively extend product service life good from slip.
To achieve these goals, the technical solution adopted in the present invention is: a kind of oilless (oil free) compressor ceramic cylinder internal surface treatment method, and its processing step is as follows:
A, selection material: select silicone content 2% ~ 5% aluminum alloy materials;
B, casting forming: select prior ready mould to carry out die casting by die casting machine, allow aluminium alloy by extruded formation cylinder blank;
C, finish turning endoporus: roll extrusion is carried out to the endoporus of cylinder with interior hobboing cutter, roll extrusion can ensure that cylinder inner wall surface is not only smooth bright and clean, and density is higher and inner surface process has good help; Reserved cylinder bore size after roll extrusion, reserved size 0.008 ~ 0.015mm larger than actual use size;
D, cleaning cylinder: clean with the inner surface of supersonic wave cleaning machine to cylinder;
E, differential arc oxidation: cylinder is placed in alkaline differential arc oxidation liquid, using cylinder as anode, insert aluminum steel and carry out differential arc oxidation as negative electrode in cylinder bore; Pass into operating voltage, the fluctuating of voltage is 480V ~ 520V, and operating current is 90A ~ 110A, and differential arc oxidation time controling was at 13 ~ 17 minutes;
F, debugging efforts voltage: first operating voltage is increased to 580V ~ 620V, operating current increases to 115A ~ 125A, then differential arc oxidation 8 ~ 12 minutes; Continue to increase operating voltage to 700V ~ 740V, operating current increases to 130A ~ 150A, differential arc oxidation 13 ~ 17 minutes;
G, cleaning cylinder: after differential arc oxidation completes, closedown is microarc oxidation equipment provided, takes off cylinder and cleans with distilled water;
H, polishing endoporus: cylinder is fixed on lathe, and the rotating speed of lathe is 300 revs/min, then polishes with sander, and the bistrique rotating speed of sander is 4000 ~ 6000 revs/min, and the frosted on bistrique is 400# frosted, polishes 1 minute;
I, secondary are polished: the frosted in step h is changed into 600# frosted, continue polishing 1 minute;
J, detection, cleaning: the roughness of rear detection cylinder surfaces of having polished and fineness, carry out cleaning then putting in storage with supersonic wave cleaning machine after reaching standard; What do not reach standard proceeds polishing, until meet standard.
Reserve in described step c and be of a size of 0.01mm.
In described step e, the fluctuating of operating voltage is 500V, and operating current is 100A, and the differential arc oxidation time is 15 minutes.
In described step f, the operating voltage of first time debugging is 600V, and operating current is 120A, and the differential arc oxidation time is 10 minutes; The operating voltage of second time debugging is 720V, and operating current is 140A, and the differential arc oxidation time is 15 minutes.
Described alkaline oxygenated liquid consists of the following composition by mass fraction: 8 ~ 16 parts of sodium aluminates, 2 ~ 8 parts of sodium carbonate, 3 ~ 6 parts of potassium hydroxide, 1 ~ 4 part of sodium metasilicate and 1 ~ 3 part of sodium dihydric hypophosphite.
Frosted in described step h and step I is diamond dust or aluminum oxide sand.
The present invention is compared to the prior art advantageously: technical process of the present invention comparatively environmental protection produces without some heavy contaminant matter, and when selection material in aluminium alloy the content of silicon below 5%, allow its electric conductivity better like this, facilitate the oxidation of subsequent technique; The present invention passes through hobboing cutter roll extrusion cylinder bore in manufacturing process, make its inner surface density high, good from slip, and the micro-pore diameter produced is less, like this with more easily adhere to polytetrafluoroethylene floor during piston ring cooperating, allow surface more lubricate and wear-resisting; In micro-arc oxidation process, pass through the change of three kinds of different operating voltages and operating current, the ceramic layer hardness allowing it be formed is higher, surface micropore is evenly distributed and thicknesses of layers is thicker; After differential arc oxidation, the roughness of rete can be allowed to reduce by repeatedly polishing improving fineness, make cylinder stability at work better, increase the service life.
Detailed description of the invention
The following stated is only preferred embodiment of the present invention, does not therefore limit protection scope of the present invention.
Embodiment 1: a kind of oilless (oil free) compressor ceramic cylinder internal surface treatment method, its processing step is as follows:
A, selection silicone content are the aluminum alloy materials of 4%; The impact of silicon content in the alloy more electric conductivities on it is larger, electric conductivity bad being difficult to is oxidized, but the words that content is too low can have an impact again to the integral hardness of aluminium alloy, so when chosen material, the content of silicon should not higher than 5%, but should lower than 2% yet, select in the ordinary course of things its content be 4% aluminium alloy be good;
B, aluminum alloy materials melt after inject prior ready mould, the shape of mould can carry out different selections according to the needs to cylinder specification; Extruded by aluminium alloy, is allowed to condition in die casting machine and carries out die casting and form cylinder blank;
C, with interior hobboing cutter, roll extrusion is carried out to the endoporus of cylinder, interior hobboing cutter adopts aluminium hobboing cutter, cylinder surfaces after this hobboing cutter roll extrusion has that density is high, smooth surface and the little effect of the micropore that formed, micropore can with adhere to polytetrafluoroethylene floor during piston ring cooperating, allow surface more lubricate and wear-resisting; And roll extrusion can also ensure that cylinder inner wall surface is not only smooth bright and clean, and density is higher and inner surface process has good help; Cylinder bore size should be reserved, reserved size 0.01mm larger than actual use size after roll extrusion; It should be noted that, reserved be of a size of 0.008mm or 0.015mm or be all feasible between both;
D, to clean with the inner surface of supersonic wave cleaning machine to cylinder, remove the superincumbent oil stain of attachment;
E, by cleaning after cylinder be placed in alkaline differential arc oxidation liquid, alkaline oxygenated liquid is the solution that mass fraction consists of the following composition: 12 parts of sodium aluminates, 5 parts of sodium carbonate, 4 parts of potassium hydroxide, 2.5 parts of sodium metasilicate and 2 parts of sodium dihydric hypophosphites; Like this using cylinder as anode, in cylinder bore, insert aluminum steel carry out differential arc oxidation as negative electrode; When passing into operating voltage, the fluctuating of voltage is 500V, and operating current is 100A, and differential arc oxidation time controling was at 15 minutes;
F, start to debug voltage after the above step is finished, first operating voltage is increased to 600V, operating current increases to 120A, then differential arc oxidation 10 minutes; After completing, continue to increase operating voltage to 720V, operating current increases to 140A, differential arc oxidation 15 minutes; The inner surface micropore of cylinder can be allowed little by carrying out differential arc oxidation under three kinds of different voltages and be evenly distributed, the rete obtained is thicker, is generally 0.4mm, and the hardness of rete is high;
G, close microarc oxidation equipment provided after differential arc oxidation completes, take off cylinder and clean with distilled water, general cleaning one time;
H, clean rear cylinder is fixed on lathe and polished for the first time, the speed of mainshaft of setting lathe is 300 revs/min, then polish with sander, the bistrique rotating speed of setting sander is 4000 ~ 6000 revs/min, frosted on bistrique adopts 400# diamond dust or aluminum oxide sand, and the polishing time is 1 minute;
I, again to polish after polish for the first time, when again polishing, frosted is changed into 600# diamond dust or aluminum oxide sand, the constant continuation polishing of all the other conditions 1 minute; Thisly improve the stability of work by the roughness on its surface being allowed lower with different frosteds polishing, extend cylinder service life;
The roughness of j, rear detection cylinder surfaces of having polished and fineness, namely reach standard, carry out cleaning then putting in storage after reaching standard with supersonic wave cleaning machine after surface roughness reaches 0.5 ~ 0.7; What do not reach standard proceeds polishing, until meet standard.
Embodiment 2, embodiment 2 is substantially identical with the technique of embodiment 1, and its difference is: step e mesorelief operating voltage is 480V, and operating current is 90A, and the differential arc oxidation time is 17 minutes; And in step f during debugging efforts voltage, its operating voltage increased is 580V, operating current is 115A, and the differential arc oxidation time is 12 minutes; The operating voltage finally again increased after completing is 700V, and operating current is 130A, and the differential arc oxidation time is 17 minutes.Then alkaline oxygenated liquid is made up of following by mass fraction: 8 parts of sodium aluminates, 2 parts of sodium carbonate, 3 parts of potassium hydroxide, 1 part of sodium metasilicate and 1 part of sodium dihydric hypophosphite.It can reach said effect in embodiment 1 equally.
Embodiment 3, embodiment 3 is substantially identical with the technique of embodiment 1, and its difference is: step e mesorelief operating voltage is 520V, and operating current is 110A, and the differential arc oxidation time is 13 minutes; And in step f during debugging efforts voltage, its operating voltage increased is 620V, operating current is 125A, and the differential arc oxidation time is 8 minutes; The operating voltage finally again increased after completing is 740V, and operating current is 150A, and the differential arc oxidation time is 17 minutes.Then alkaline oxygenated liquid is made up of following by mass fraction: 16 parts of sodium aluminates, 8 parts of sodium carbonate, 6 parts of potassium hydroxide, 4 parts of sodium metasilicate and 3 parts of sodium dihydric hypophosphites.It can reach said effect in embodiment 1 equally.
Embodiment 4, embodiment 4 is substantially identical with the technique of embodiment 1, and its difference is: step e mesorelief operating voltage is 500V, and operating current is 100A, and the differential arc oxidation time is 13 minutes; And in step f during debugging efforts voltage, its operating voltage increased is 600V, operating current is 120A, and the differential arc oxidation time is 10 minutes; The operating voltage finally again increased after completing is 720V, and operating current is 140A, and the differential arc oxidation time is 15 minutes.Then alkaline oxygenated liquid is made up of following by mass fraction: 12 parts of sodium aluminates, 5 parts of sodium carbonate, 4 parts of potassium hydroxide, 2.5 parts of sodium metasilicate and 2 parts of sodium dihydric hypophosphites.It can reach said effect in embodiment 1 equally.
Claims (6)
1. an oilless (oil free) compressor ceramic cylinder internal surface treatment method, is characterized in that: its processing step is as follows:
A, selection material: select silicone content 2% ~ 5% aluminum alloy materials;
B, casting forming: select prior ready mould to carry out die casting by die casting machine, allow aluminium alloy extruded shaping formation cylinder blank;
C, finish turning endoporus: roll extrusion is carried out to the endoporus of cylinder with interior hobboing cutter, reserved cylinder bore size after roll extrusion, reserved size 0.008 ~ 0.015mm larger than actual use size;
D, cleaning cylinder: clean with the inner surface of supersonic wave cleaning machine to cylinder;
E, differential arc oxidation: cylinder is placed in alkaline differential arc oxidation liquid, using cylinder as anode, insert aluminum steel and carry out differential arc oxidation as negative electrode in cylinder bore; Pass into operating voltage, the fluctuating of voltage is 480V ~ 520V, and operating current is 90A ~ 110A, and differential arc oxidation time controling was at 13 ~ 17 minutes;
F, debugging efforts voltage: first operating voltage is increased to 580V ~ 620V, operating current increases to 115A ~ 125A, then differential arc oxidation 8 ~ 12 minutes; Continue to increase operating voltage to 700V ~ 740V, operating current increases to 130A ~ 150A, differential arc oxidation 13 ~ 17 minutes;
G, cleaning cylinder: after differential arc oxidation completes, closedown is microarc oxidation equipment provided, takes off cylinder and cleans with distilled water;
H, polishing endoporus: cylinder is fixed on lathe, and the rotating speed of lathe is 300 revs/min, then polishes with sander, and the bistrique rotating speed of sander is 4000 ~ 6000 revs/min, and the frosted on bistrique is 400# frosted, polishes 1 minute;
I, secondary are polished: the frosted in step h is changed into 600# frosted, continue polishing 1 minute;
J, detection, cleaning: the roughness of rear detection cylinder surfaces of having polished and fineness, carry out cleaning then putting in storage with supersonic wave cleaning machine after reaching standard; What do not reach standard proceeds polishing, until meet standard.
2. oilless (oil free) compressor ceramic cylinder internal surface treatment method according to claim 1, is characterized in that: reserve in described step c and be of a size of 0.01mm.
3. oilless (oil free) compressor ceramic cylinder internal surface treatment method according to claim 2, is characterized in that: in described step e, the fluctuating of operating voltage is 500V, and operating current is 100A, and the differential arc oxidation time is 15 minutes.
4. oilless (oil free) compressor ceramic cylinder internal surface treatment method according to claim 3, is characterized in that: in described step f, the operating voltage of first time debugging is 600V, and operating current is 120A, and the differential arc oxidation time is 10 minutes; The operating voltage of second time debugging is 720V, and operating current is 140A, and the differential arc oxidation time is 15 minutes.
5. oilless (oil free) compressor ceramic cylinder internal surface treatment method according to claim 4, is characterized in that: described alkaline oxygenated liquid consists of the following composition by mass fraction: 8 ~ 16 parts of sodium aluminates, 2 ~ 8 parts of sodium carbonate, 3 ~ 6 parts of potassium hydroxide, 1 ~ 4 part of sodium metasilicate and 1 ~ 3 part of sodium dihydric hypophosphite.
6. oilless (oil free) compressor ceramic cylinder internal surface treatment method according to claim 5, is characterized in that: the frosted in described step h and step I is diamond dust or aluminum oxide sand.
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| CN201410492116.1A CN104384836B (en) | 2014-09-23 | 2014-09-23 | Inner surface treatment method for ceramic air cylinder of oilless compressor |
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Cited By (5)
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| CN107236979A (en) * | 2016-03-29 | 2017-10-10 | 长城汽车股份有限公司 | Multicylinder engine cylinder holes ceramic fixture and device and ceramming processes |
| CN107363307A (en) * | 2017-08-16 | 2017-11-21 | 上海航天化工应用研究所 | A kind of engine heat insulation layer surface treatment process method |
| CN110576290A (en) * | 2018-06-11 | 2019-12-17 | 苏州昊信精密机械有限公司 | Method for machining precise compact oil cylinder barrel |
| CN113210635A (en) * | 2021-05-28 | 2021-08-06 | 江苏神通阀门股份有限公司 | Machining method of cylinder block |
| CN113245910A (en) * | 2021-06-08 | 2021-08-13 | 丽水市职业高级中学 | Polishing process for inner hole of linear bearing |
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| CN113245910A (en) * | 2021-06-08 | 2021-08-13 | 丽水市职业高级中学 | Polishing process for inner hole of linear bearing |
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| CN104384836B (en) | 2017-03-22 |
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Effective date of registration: 20200602 Address after: 317511 184 Binhai Road, Wenling, Taizhou, Zhejiang Patentee after: TAIZHOU XINGYA TECHNOLOGY Co.,Ltd. Address before: 317511, Taizhou, Zhejiang province Wenling City Pine Road, South Coast Avenue Patentee before: WENLING JINGANG MANUFACTURING FACTORY (GENERAL PARTNERSHIP) |