CN102492804A - Nanometer strengthening method of surface of long thin piston rod of hydraulic oil cylinder - Google Patents
Nanometer strengthening method of surface of long thin piston rod of hydraulic oil cylinder Download PDFInfo
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- CN102492804A CN102492804A CN2011104106092A CN201110410609A CN102492804A CN 102492804 A CN102492804 A CN 102492804A CN 2011104106092 A CN2011104106092 A CN 2011104106092A CN 201110410609 A CN201110410609 A CN 201110410609A CN 102492804 A CN102492804 A CN 102492804A
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Abstract
The invention discloses a nanometer strengthening method of the surface of a long thin piston rod of a hydraulic oil cylinder, which belongs to the technical field of surface engineering and includes conducting half finish turning on the long thin piston rod by utilizing an ultrasound nanometer strengthening system, conducting finish turning after the half finish turning, retaining ultrasonic processing quantity according to difference of machine parts, opening an oil spraying pipe, setting spindle rotating speed and knife frame feeding speed of a horizontal type lathe according to the diameter of the long thin piston rod and opening an ultrasound nanometer strengthening device to conduct ultrasound nanometer strengthening processing. The strengthening method utilizes cold plasticity of the surface of the piston rod in the normal temperature state and utilizes composite energy of mechanical energy generated by high frequency vibration of rolling balls and heat energy with the temperature slightly higher than room temperature to conduct grinding-agent-free grinding, strengthening and tiny transformation processing on the surface of the piston rod to enable the surface of the piston rod to achieve better surface roughness and refine grains of surface metal. Simultaneously, pressure stress is generated on the surface, surface micro-hardness is improved, abrasion resistance is strengthened, and fatigue service life is prolonged.
Description
Technical field
The present invention relates to a kind of hydraulic ram elongate plunger rod nano surface enhancement method, belong to field of surface engineering technique.Can be applicable to mechanical manufacturing field.
Background technology
Along with progress of science and technology, each field requires also more and more widely the type of hydro-cylinder.Therefore, the reinforcement modification of cylinder device internal friction secondary surface becomes the problem of a growing interest thus.Surface strengthening is a kind of process method of improving mechanical component and component surface performance, improving fatigue strength and wear resisting property, can also improve corrosion resistance nature sometimes.
In surface strengthening technology, as the enhancement method of mechanical system, main now cold rolling and the shot-peening dual mode of adopting.But, cold rolling or ball blasting method be applied in technical certain restriction that also receives.As the roll extrusion technology, only be applicable to rotary type, the hardness part below 40HRC.And owing to be pressurised into the static load form, bigger for reaching the required pressure of a certain amount of distortion in rolling; And blasting technology is generally used for the not too high part of surface quality requirement.
For hydraulic cylinder piston rod, the mode of its surface strengthening at present mainly is to realize through the mode of quenching.And for elongate plunger rod, thermal treatment can make part deformation usually, changes its size and dimension precision.
Summary of the invention
The present invention provides a kind of nano reinforcement method of hydraulic ram elongated piston rod outer surface, and with its processing slim piston rod outside surface, the surface microstructure that obtains is little, and is highly polished, wear resistance good, can play the effect that the refinement of metal grain is strengthened; Further improve its anti-wear and wear-resistant performance, increase the work-ing life of hydro-cylinder.
Principle of the present invention is to utilize the cold plasticity characteristics of piston rod surface under the normal temperature state; Mechanical energy that utilization ball high-frequency vibration produces and temperature are handled grinding, reinforcement and miniature deformation that piston rod surface carries out abrasive-free a little more than the energy composite energy of the heat energy of room temperature; Make piston rod surface reach better surfaceness, the crystal grain of refinement surface metal produces stress simultaneously on the surface; Improve surface microhardness, strengthen its wear resistance and fatigue lifetime.
The present invention realizes through following technical scheme: a kind of hydraulic ram elongate plunger rod nano surface enhancement method; The ultrasonic nano consolidation system that uses is: comprise horizontal lathe; Be installed in the anchor clamps, spray bar and the knife rest that are used for fixing elongate plunger rod on the horizontal lathe, the ultrasonic nano intensifying device; Described ultrasonic nano intensifying device comprises unit, ultrasonic generator, transverter, horn and the ball that connects successively; Transverter is connected with knife rest.
The concrete operations step is following:
1) the ultrasonic nano consolidation system is set up in installation, and unit, ultrasonic generator, transverter, horn, ball are connected and installed successively; Elongate plunger rod to be processed is installed on the anchor clamps, and anchor clamps, spray bar and knife rest are connected on the horizontal lathe; Transverter is connected with knife rest;
2) debugging: the height that the axis of transverter, horn, ball linker is debugged with elongate plunger rod is consistent, and with its axis normal; The adjustment ball makes it rotate flexibly, stablize starting of oscillation; The numerical value of each table of unit shows normal, and the ultrasonic vibration output state is: output rating 480W, output frequency 30KHz; Pulsation of machine tool main shaft is less than 0.03mm; The gap of system is less than 0.05mm during cross feed;
3) processing: elongate plunger rod is carried out half finish turning; Finish turning after half finish turning finishes is reserved the ultrasonic machining amount according to the difference of parts; Open spray bar, according to the diameter of elongate plunger rod the speed of mainshaft and the knife rest speed of feed of horizontal lathe are set, the startup ultrasonic wave module is carried out the ultrasonic nano intensified process; Need in the course of processing to guarantee: roughness should be not more than HRC60 less than Ra6.3, surface hardness behind the piston rod finish turning; Maximum line velocity is 80m/min; The lubricating oil of spray bar ejection is kerosene and 1: 3 mixtinite of 20# machinery oil;
4) machine after, unload elongate plunger rod, close ultrasonic nano consolidation system device.
In the technique scheme, unit, ultrasonic generator, transverter, horn, ball are formed ultrasonic system.The state that unit is used for regulating the hyperacoustic parameter of nano reinforcement process and monitors ultrasonic machining in real time; Ultrasonic generator is in order to produce frequency at the 30KHz alternating voltage; Transverter converts the 30KHz alternating voltage to the mechanical vibration of 30KHz; Horn becomes the high-frequency vibration of little amplitude the high-frequency vibration of large amplitude; Ball passes to the elongate plunger rod surface with high-frequency vibration and carries out nano reinforcement.In the process of nano reinforcement, elongate plunger rod is by the lathe module drive; Transverter links to each other with knife rest, can moving axially along elongate plunger rod.The lathe module is made up of spray bar, elongate plunger rod, anchor clamps, horizontal lathe and knife rest.In the process of nano reinforcement, spray bar injects lubricating oil between ball and piston rod, and piston rod is connected with horizontal lathe through anchor clamps, under the driving of horizontal lathe, makes elongate plunger rod according to the parameter rotation of setting.
Through detecting, the technical indicator after the processing reaches: surface hardness raising 20%～100%, layer depth 0.1～0.2mm; Roughness is about Ra0.01～0.8.
The present invention has the following advantages:
1) the present invention is suitable for low rigidity part.When the ball high-frequency vibration; Lean on mechanical energy and temperature to act on piece surface a little more than the heat energy of room temperature; Rather than main depended on pressure, therefore, part can not cause the distortion of part when being handled because of the effect of mechanical pressure or heat, can realize processing to elongate articles and thin-wall part.Owing to be not the effect of leaning on mechanical pressure, therefore can handle harder material, general requirement piece surface hardness was not higher than HRC60 before handling.
2) nano reinforcement.The interaction of ball and piece surface is high frequency (frequency is 30KHZ), macro-energy and effect that amplitude is very little; Cause the miniature deformation of piece surface; The viscous deformation repeatedly of high frequency causes the crystal grain fragmentation; This special viscous deformation mode can make near the grain refining of material surface to nanometer scale, and this makes that the surface grain refinement degree is even more serious and even than other intense plastic strain modes such as ultrasonic impact, mechanical mills.The generation of nanocrystal makes the piece surface microhardness improve 20%～100%, the wear resistance and the fatigue lifetime of having improved piece surface.
3) surface smoothness is high.Utilize the cold plasticity characteristics of metal under the normal temperature state; Carrying out grinding, reinforcement and the miniature deformation of abrasive-free handles; Make the metal parts surface reach better surfaceness requirement; Can make the surface smoothness of parts reach Ra0.01-Ra0.8, the surface of this ultra-smooth has further strengthened its wear resistance.
4) efficient is high.Direct in-situ carries out the ultrasonic nano intensified process behind finish turning on the horizontal lathe, has saved the middle transport process of piston rod, has improved working efficiency.This working method is than using grinding machine processing to economize one times time, and the positioning reference of processing parts is same benchmark simultaneously, and row position tolerance guarantees easily.
Description of drawings
Fig. 1 is the ultrasonic nano consolidation system structural representation that the present invention uses.
Among the figure: 1, unit, 2, ultrasonic generator, 3, transverter, 4, horn, 5, ball, 6, spray bar, 7, elongate plunger rod, 8, anchor clamps, 9, horizontal lathe, 10, knife rest.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
As shown in Figure 1, the ultrasonic nano consolidation system is mainly connected to form by ultrasonic wave module and lathe module successively.Wherein, ultrasonic wave module is made up of unit 1, ultrasonic generator 2, transverter 3, horn 4, ball 5.The lathe module is made up of spray bar 6, elongate plunger rod 7, anchor clamps 8, horizontal lathe 9 and knife rest 10.Hyperacoustic parameter is regulated and monitoring in real time by unit 1 in the nano reinforcement process; Ultrasonic generator 2 is in order to produce frequency at the 30KHz alternating voltage; Transverter 3 converts the 30KHz alternating voltage to ultrasonic vibration; Through horn 4 vibration amplitude is amplified; Drive ball 5 and do high-frequency vibration, ball 5 interacts with elongate plunger rod 7.In its interactional process, spray bar 6 injects lubricating oil between ball 5 and piston rod 7.The lubricating oil that uses is kerosene and 1: 3 mixtinite of 20# machinery oil.Piston rod 7 is connected with horizontal lathe 9 through anchor clamps 8, under the driving of horizontal lathe 9, makes elongate plunger rod 7 according to the parameter rotation of setting.Transverter 3 links to each other with knife rest 10 and realizes moving axially.
Debugging: the height that the axis of transverter, horn, ball linker is debugged with elongate plunger rod is consistent, and with its axis normal; The adjustment ball makes it rotate flexibly, stablize starting of oscillation; The numerical value of each table of unit shows normal, and the ultrasonic vibration output state is: output rating 480W, output frequency 30KHz; Pulsation of machine tool main shaft is less than 0.03mm; The gap of system is less than 0.05mm during cross feed;
Processing: diameter 50mm elongate plunger rod is carried out half finish turning; Finish turning after half finish turning finishes is reserved the ultrasonic machining amount according to the difference of parts; Open spray bar, according to the diameter of elongate plunger rod speed of mainshaft 240r/min and the knife rest speed of feed 0.26mm/r of horizontal lathe are set, the startup ultrasonic wave module is carried out the ultrasonic nano intensified process; Need in the course of processing to guarantee: roughness should be not more than HRC60 less than Ra6.3, surface hardness behind the piston rod finish turning; Maximum line velocity is 80m/min; The lubricating oil of spray bar ejection is kerosene and 1: 3 mixtinite of 20# machinery oil.
After machining, unload elongate plunger rod, close the ultrasonic nano consolidation system.Through detecting, the technical indicator after the processing reaches: surface hardness raising 36%, layer depth 0.15mm; Roughness is Ra0.05.
Claims (3)
1. hydraulic ram elongate plunger rod nano surface enhancement method; It is characterized in that; The ultrasonic nano consolidation system that uses is: comprise horizontal lathe (9); Be installed in the anchor clamps (8), spray bar (6) and the knife rest (10) that are used for fixing elongate plunger rod (7) on the horizontal lathe (9), the ultrasonic nano intensifying device; Described ultrasonic nano intensifying device comprises unit (1), ultrasonic generator (2), transverter (3), horn (4) and the ball (5) that connects successively; Transverter (3) is connected with knife rest (10); Concrete procedure of processing is following:
1) the ultrasonic nano consolidation system is set up in installation: unit (1), ultrasonic generator (2), transverter (3), horn (4), ball (5) are connected and installed successively; Elongate plunger rod to be processed (7) is installed on the anchor clamps (8), and anchor clamps (8), spray bar (6) and knife rest (10) are connected on the horizontal lathe (9); Transverter (3) is connected with knife rest (10);
2) debugging: the height that the axis of transverter, horn, ball linker is debugged with elongate plunger rod is consistent, and with its axis normal; Adjustment ball (5) makes it rotate flexibly, stablize starting of oscillation; The numerical value of each table of unit shows normal, and the ultrasonic vibration output state is: output rating 480W, output frequency 30KHz; Pulsation of machine tool main shaft is less than 0.03mm; The gap of system is less than 0.05mm during cross feed.
3) processing: elongate plunger rod is carried out half finish turning; Finish turning after half finish turning finishes is reserved the ultrasonic machining amount according to the difference of parts; Open spray bar, according to the diameter of elongate plunger rod the speed of mainshaft and the knife rest speed of feed of horizontal lathe are set, startup ultrasonic nano consolidation system carries out the ultrasonic nano intensified process; Keep in the course of processing: roughness should be not more than HRC60 less than Ra6.3, surface hardness behind the piston rod finish turning; Maximum line velocity is 80m/min; 4) machine after, unload elongate plunger rod, close the ultrasonic nano consolidation system.
2. hydraulic ram elongate plunger rod nano surface enhancement method according to claim 1 is characterized in that described elongated piston bar material to be processed is structural carbon steel, structural alloy steel, spring steel, bearing steel, TS or rapid steel.
3. hydraulic ram elongate plunger rod nano surface enhancement method according to claim 1 is characterized in that, the lubricating oil of described spray bar ejection is kerosene and 1: 3 mixtinite of 20# machinery oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110410609 CN102492804B (en) | 2011-12-06 | 2011-12-06 | Nanometer strengthening method of surface of long thin piston rod of hydraulic oil cylinder |
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| CN 201110410609 CN102492804B (en) | 2011-12-06 | 2011-12-06 | Nanometer strengthening method of surface of long thin piston rod of hydraulic oil cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106881560A (en) * | 2015-12-22 | 2017-06-23 | 山东华云机电科技有限公司 | A kind of supersonic making method for improving locomotive wheel wearability and application |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924030A (en) * | 2005-08-30 | 2007-03-07 | 宝山钢铁股份有限公司 | Metal surface nanolizing method of supersonic wave high-energy surface machinery processing |
| CN101941082A (en) * | 2010-09-20 | 2011-01-12 | 中煤邯郸煤矿机械有限责任公司 | Ultrasonic wave processing method for outer surface of hydraulic cylinder lever with large cylinder diameter |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924030A (en) * | 2005-08-30 | 2007-03-07 | 宝山钢铁股份有限公司 | Metal surface nanolizing method of supersonic wave high-energy surface machinery processing |
| CN101941082A (en) * | 2010-09-20 | 2011-01-12 | 中煤邯郸煤矿机械有限责任公司 | Ultrasonic wave processing method for outer surface of hydraulic cylinder lever with large cylinder diameter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106881560A (en) * | 2015-12-22 | 2017-06-23 | 山东华云机电科技有限公司 | A kind of supersonic making method for improving locomotive wheel wearability and application |
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