CN102031514A - Cylindrical surface hardening and strengthening treatment method for ultra-large piston of large oil press - Google Patents
Cylindrical surface hardening and strengthening treatment method for ultra-large piston of large oil press Download PDFInfo
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- CN102031514A CN102031514A CN2010105589955A CN201010558995A CN102031514A CN 102031514 A CN102031514 A CN 102031514A CN 2010105589955 A CN2010105589955 A CN 2010105589955A CN 201010558995 A CN201010558995 A CN 201010558995A CN 102031514 A CN102031514 A CN 102031514A
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Abstract
The invention relates to a cylindrical surface hardening and strengthening treatment method for an ultra-large piston of a large oil press, comprising the steps of: (1) cleaning the running surface of an ultra-large working cylinder piston of an oil press, and then mixing micron-scale powder and nanoscale powder, which respectively comprise TiO2, SiO2, graphite and Ae2O2 according to the proportion of 1:1:0.3:0.1, wherein the weight ratio of various materials in the micron-scale powder to the various materials in the nanoscale powder is 4:1; uniformly blending the mixed powder with a methylcellulose solution, and presetting the blended mixed powder on the piston running surface to be strengthened by adopting a spraying method; and forming a uniform coating to be hardened, deepened and strengthened by laser, with the thickness of 0.05-0.15mm; (2) carrying out densely covering type deep-layer hardening and strengthening by using a TFL (Thin Film Laser)-H6000CO2 high-power laser processing machine set with the wide laser beam of 30*2mm and the effective power of 4300-5200W to realize laser hardening and strengthening to reach the effective depth of 2.2-3.0mm and the hardened layer hardness of HRC55-60; and (3) after the treatment of laser deep-layer hardening and strengthening, carrying out ground finish on the running surface of the piston to reach the machine size tolerance and precision of design paper. In the invention, the process is simple and the effect is very obvious.
Description
Technical field
The present invention relates to a kind of component surface sclerosis enhanced processing method, particularly a kind of cylinder sclerosis enhanced processing method of large-sized hydraulic press ultra-large type piston.
Background technology
At present, in the heavy-duty machinery production, 2 ~ 80,000 ton large-scale oil presses are made, and have only a few countries to have this technology and manufacturing capacity in the world.The working cylinder ultra-large type piston of this kind large-sized hydraulic press is one of core apparatus, and the single-piece tens of tons of Large Piston that weighs particularly surpasses the ultra-large type working cylinder piston of hundred tons of weights, and its material adopts medium carbon alloy steel manufacturings such as 35CrMo, 42CrMo, 45Mn.The piston maximum diameter more than Φ 2000mm because piston super large, overweight, the prior heat treatment technology, for example method such as high-frequency surface hardening is difficult to satisfy and its working-surface is carried out quench hardening handles.
The surface overlaying of employing hardened layer is also arranged aborning, and methods such as chromium plating are used to improve wear resisting property to the outer working-surface intensive treatment of piston.The fatigue damage of its generation, workpiece deformation, surface crack, coating peeling, defective such as come off are difficult to overcome, and influence the use properties of piston, can't reach the design objective and the use properties of oil press.And problems such as plating environmental pollution are also restricting manufacturing process.
Therefore, provide that a kind of technology is reliable, technology rationally, the cylinder sclerosis enhanced processing method of reliable in quality, the significant large-sized hydraulic press ultra-large type of practical application effect piston, be this technology and make one of problem that the domain engineering technician should be devoted to solve.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, the cylinder sclerosis enhanced processing method of the simple and tangible large-sized hydraulic press ultra-large type of the practical function piston of a kind of safety non-toxic, technology is provided.
The technical solution adopted in the present invention is for achieving the above object: a kind of cylinder sclerosis enhanced processing method of large-sized hydraulic press ultra-large type piston is characterized in that implementation step is as follows:
(1) oil press ultra-large type working cylinder piston working-surface will contain TiO through after cleaning out
2, SiO
2, graphite, Ae
2O
2, to mix in the micron order pulvis and the nano level pulvis of 1:1:0.3:0.1 ratio, the weight ratio of wherein various material micron level pulvis and nano level pulvis is 4:1; After above-mentioned pulvis mixed, make tackifier with methocel solution and evenly merge, adopt spraying method to be preset at piston and treat the forced working surface; Net thickness is 0.05 ~ 0.15mm, forms uniform laser hardening in-depth and strengthens coating;
(2) use TFL-H6000CO
2High power laser light processing unit adopts 30 * 2mm wide cut laser beam, and active power 4300 ~ 5200W strengthens in the piston face formula deep layer sclerosis of gathering, realizes laser hardening reinforcement significant depth 2.2 ~ 3.0mm, hardened layer hardness HRC55 ~ 60;
(3) after the sclerosis of laser deep layer was strengthened, ground finish was adopted on the pistons work surface routinely, reaches design paper mechanical dimension tolerance and precision.
The invention has the beneficial effects as follows:
(1) adopts this laser deep layer sclerosis enhancement method, solved fatigue damage, workpiece deformation, surface crack, deep layer peeling that conventional thermal treatment of surface hardening reinforcement of large-sized hydraulic press ultra-large type pistons work and coated layer can't overcome, come off and problem such as environmental pollution.
(2) Chang Gui laser surface hardening treatment process, generally at the workpiece surface laser quenching hardened layer below 1.0mm, can't realize that large-sized hydraulic press ultra-large type working cylinder piston needs deep layer sclerosis to strengthen, and improves the effect in its strength property and work-ing life.The inventive method has realized the laser deep layer sclerosis reinforcement on ultra-large type pistons work surface, has improved the intensity index of large-sized hydraulic press ultra-large type working cylinder piston significantly, has realized designing technique performance index and requirement in work-ing life.
(3) through the pistons work surface that laser in-depth sclerosis is strengthened, no ablation, flawless, nothing distortion, the hardness that sclerosis is strengthened is even, and intensity index is reliable.Strengthening back mill amount of finish only is 0.10mm ~ 0.15mm, mill processing rear surface homogeneous microstructure, and working accuracy reaches design paper technical requirements standard.
The ultra-large type working cylinder piston was manufactured practical problems during the great equipment that the invention solves was made, provide that a kind of technology is reliable, technology rationally, reliable in quality, effect be remarkable, and the outer working-surface laser deep layer sclerosis of the large-sized hydraulic press ultra-large type working cylinder piston of safety non-pollution enhanced processing method.
Embodiment
Below in conjunction with preferred embodiment, to details are as follows according to embodiment provided by the invention:
A kind of cylinder sclerosis enhanced processing method of large-sized hydraulic press ultra-large type piston, implementation step is as follows:
(1) oil press ultra-large type working cylinder piston working-surface will contain TiO through after cleaning out
2, SiO
2, graphite, Ae
2O
2, to mix in the micron order pulvis and the nano level pulvis of 1:1:0.3:0.1 ratio, the weight ratio of wherein various material micron level pulvis and nano level pulvis is 4:1; After above-mentioned pulvis mixed, making tackifier with methocel solution evenly merges, described pulvis and tackifier can reach evenly by the workpiece surface sprayed coating and get final product, it is a kind of mixing solutions attitude, usually pulvis and tackifier are 1:3 ~ 4(weight/volume), can prepare and adopt spraying method to be preset at piston routinely and treat the forced working surface; Net thickness is 0.05 ~ 0.15mm, forms uniform laser hardening in-depth and strengthens coating.
(2) use TFL-H6000CO
2High power laser light processing unit adopts 30 * 2mm wide cut laser beam, and active power 4300 ~ 5200W strengthens in the piston face formula deep layer sclerosis of gathering, realizes laser hardening reinforcement significant depth 2.2 ~ 3.0mm, hardened layer hardness HRC55 ~ 60.
(3) after the sclerosis of laser deep layer was strengthened, ground finish was adopted on the pistons work surface routinely, reaches design paper mechanical dimension tolerance and precision.
For example: Φ 1800 * 5500mm ultra-large type master working cylinder piston of certain state key model large-sized hydraulic press, adopt laser in-depth sclerosis enhancement method; Use THL-H6000 type 6000WCO
2The laser processing unit adopts 30 * 2mm wide cut laser beam, and power 4600W strengthens the formula deep layer sclerosis of gathering of pistons work surface, in advance at piston pending surperficial pre-hardening reinforcement enhancing coating, uniform thickness 0.07 ~ 0.12mm.After testing, laser hardening depth of enhanced layer 2.4 ~ 2.6mm, HRC56 ~ 59 have reached technical requirements.
In a word, this method is used high power CO
2The laser processing unit adopts gather on pistons work surface formula, deep layer sclerosis of wide cut laser beam to strengthen, and realizes the laser hardening reinforcement.The degree of depth reaches 2.2 ~ 3.0mm in workpiece apart from the surface.In order to reach above-mentioned effect, present method adopts the laser hardening in-depth to strengthen coating again, has realized the laser deep layer sclerosis strengthening effect of piston.
Above-mentioned detailed description of the cylinder of this large-sized hydraulic press ultra-large type piston sclerosis enhanced processing method being carried out with reference to embodiment; be illustrative rather than determinate; can enumerate several embodiment according to set of dispense than qualification scope; therefore in the variation and the modification that do not break away under the general plotting of the present invention, should belong within protection scope of the present invention.
Claims (1)
1. the cylinder of large-sized hydraulic press ultra-large type piston sclerosis enhanced processing method is characterized in that implementation step is as follows:
(1) oil press ultra-large type working cylinder piston working-surface will contain TiO through after cleaning out
2, SiO
2, graphite, Ae
2O
2, to mix in the micron order pulvis and the nano level pulvis of 1:1:0.3:0.1 ratio, the weight ratio of wherein various material micron level pulvis and nano level pulvis is 4:1; After above-mentioned pulvis mixed, make tackifier with methocel solution and evenly merge, adopt spraying method to be preset at piston and treat the forced working surface; Net thickness is 0.05 ~ 0.15mm, forms uniform laser hardening in-depth and strengthens coating;
(2) use TFL-H6000CO
2High power laser light processing unit adopts 30 * 2mm wide cut laser beam, and active power 4300 ~ 5200W strengthens in the piston face formula deep layer sclerosis of gathering, realizes laser hardening reinforcement significant depth 2.2 ~ 3.0mm, hardened layer hardness HRC55 ~ 60;
(3) after the sclerosis of laser deep layer is strengthened, ground finish is adopted on the pistons work surface, reaches design paper mechanical dimension tolerance and precision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105589955A CN102031514A (en) | 2010-11-25 | 2010-11-25 | Cylindrical surface hardening and strengthening treatment method for ultra-large piston of large oil press |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105589955A CN102031514A (en) | 2010-11-25 | 2010-11-25 | Cylindrical surface hardening and strengthening treatment method for ultra-large piston of large oil press |
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| CN102031514A true CN102031514A (en) | 2011-04-27 |
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| CN2010105589955A Pending CN102031514A (en) | 2010-11-25 | 2010-11-25 | Cylindrical surface hardening and strengthening treatment method for ultra-large piston of large oil press |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205747A (en) * | 2013-03-19 | 2013-07-17 | 江苏仪征威龙活塞环有限公司 | Processing method of high-wear-resistance laser-reinforced material for piston rings |
| CN111621779A (en) * | 2020-05-19 | 2020-09-04 | 北京工业大学 | Laser composite processing method for repairing gradient material of inner wall of aircraft landing gear |
-
2010
- 2010-11-25 CN CN2010105589955A patent/CN102031514A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103205747A (en) * | 2013-03-19 | 2013-07-17 | 江苏仪征威龙活塞环有限公司 | Processing method of high-wear-resistance laser-reinforced material for piston rings |
| CN111621779A (en) * | 2020-05-19 | 2020-09-04 | 北京工业大学 | Laser composite processing method for repairing gradient material of inner wall of aircraft landing gear |
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| ASS | Succession or assignment of patent right |
Owner name: SICHUAN XINJILONG ENVIRONMENTAL PROTECTION TECHNOL Free format text: FORMER OWNER: TIANJIN HAN S YQ LASER TECHNOLOGY CO., LTD. Effective date: 20130517 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 300353 JINNAN, TIANJIN TO: 643000 ZIGONG, SICHUAN PROVINCE |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20130517 Address after: 643000 No. 77 warehouse Road, hi tech Industrial Park, Sichuan, Zigong Applicant after: Sichuan Geelong Environmental Technology Co. Ltd. Address before: 300353 Tianjin City Station Town Jinnan District Huang industrial park Win Industry Road No. 1 Applicant before: Tianjin Hans YQ Laser Co., Ltd. |
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Application publication date: 20110427 |