CN109848647A - A kind of processing technology of the piston rod of Stirling engine gas distribution piston - Google Patents
A kind of processing technology of the piston rod of Stirling engine gas distribution piston Download PDFInfo
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- CN109848647A CN109848647A CN201811633741.8A CN201811633741A CN109848647A CN 109848647 A CN109848647 A CN 109848647A CN 201811633741 A CN201811633741 A CN 201811633741A CN 109848647 A CN109848647 A CN 109848647A
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Abstract
The present invention provides a kind of processing technology of the piston rod of Stirling engine gas distribution piston, it can solve and the problem of processing the gas distribution piston aluminum piston bar of high-precision requirement is difficult using existing conventional machining process.It is the following steps are included: step 1, blank preprocessing；Step 2, rough turn outer circle；Step 3, ageing treatment；Step 4 repairs center lapping；Step 5, half fine turning outer circle；Step 6, fine turning outer circle；Step 7, smart car both ends of the surface；Step 8, half fine cylindrical；Step 9, hard anodizing；Step 10, fine cylindrical；Step 11, the both ends of the surface that the blank is refined on surface grinding machine process the threaded hole at the blank both ends respectively on numerically controlled lathe, examine each size, complete processing to layout design size.
Description
Technical field
The present invention relates to Stirling engine component processing field, specially a kind of Stirling engine gas distribution piston
The processing technology of piston rod.
Background technique
Stirling engine be by the working medium (hydrogen or helium) in cylinder through supercooling, compression, absorb heat, be expanded to one
The circulation in a period carrys out output power.Gas distribution piston is the important component of Stirling engine, and Stirling engine relies on
The movement of gas distribution piston carrys out the flowing of working medium in tissue closed circulation system.
Fig. 1 is the piston rod construction schematic diagram of gas distribution piston, is cylindrical-shaped structure and the roundlet rod segment 1 by being coaxially disposed
It is formed with big round rod segment 2, the both ends of the surface of piston rod are threaded hole 3.Piston rod is aluminium alloy rod, and finished product accuracy requirement is non-
Chang Gao, if cylindricity requires≤0.002, straightness requires≤0.008, surface roughness requirements Ra≤0.2, and traditional processing
Technique is extremely difficult to above-mentioned required precision.
Summary of the invention
It is difficult to process the technology of the gas distribution piston aluminum piston bar of high-precision requirement for using existing conventional machining process
Problem, the present invention provides a kind of processing technologys of the piston rod of Stirling engine gas distribution piston, can guarantee piston rod
Machining accuracy meet design requirement.
Its technical solution is such that a kind of processing technology of the piston rod of Stirling engine gas distribution piston, special
Sign is comprising following steps:
Step 1, blank preprocessing carry out blanking using 6061 aluminum alloy round bars of T6 state as blank, in high precision numerical control
On lathe, the outer circle of the blank is clamped with three-jaw self-centering chuck, the both ends of the blank described in high-speed steelknife Vehicle Processing make institute
It states blank and reserves 1mm machining allowance in length, while being bored respectively in the both ends of the surface of the blank with high-speed steel centre drill
Heart hole；
Step 2, rough turn outer circle clamp one end of the blank with three-jaw self-centering chuck on high precision digital control lathe, top
Withstand the centre bore on the other end of the blank, the outer circle of the blank described in high-speed steelknife Vehicle Processing, the blank
Roundlet rod segment and big round rod segment reserve the machining allowance of 0.5mm respectively；
The blank after rough turn outer circle is placed on and stands 3 days at room temperature by step 3, ageing treatment；
Step 4 repairs center lapping, on high precision digital control lathe, with oilstone or elastic grinding wheel to the centre bore on the blank
It is ground；
Step 5, half fine turning outer circle clamp one end of the blank with three-jaw self-centering chuck on high precision digital control lathe, top
The centre bore on the other end of blank is stated in pinnacle residence, uses the outer circle of blank described in half finishing processing of diamond blade, institute
The roundlet rod segment and big round rod segment of stating blank reserve the machining allowance of 0.12mm ~ 0.2mm respectively；
Step 6, fine turning outer circle clamp one end of the blank with three-jaw self-centering chuck on high precision digital control lathe, top
The centre bore on the other end of the blank is withstood, the outer circle of blank described in diamond blade finishing processing, processing ginseng are used
Number are as follows: speed of mainshaft 2200r/min ~ 2500r/min, amount of feeding 0.02mm/r ~ 0.04mm/r, it is special with aluminium alloy in cutting process
It is fully cooled and is lubricated with cuttings liquid, the roundlet rod segment of the blank and big round rod segment reserve adding for 0.02mm ~ 0.05mm respectively
Spare time amount；
Step 7, smart car both ends of the surface on the basis of the blank outer circle good by smart car, use diamond on high precision digital control lathe
The both ends of the surface of blank described in blade finishing processing, machined parameters are consistent with fine turning outer circle parameter, machining allowance 0.2mm；
Step 8, half fine cylindrical are partly refined the outer circle of the blank using GC80 grinding wheel, make table on high accuracy centerless grinding machine
Surface roughness Ra≤0.4, remaining is to layout design size, grinding parameter are as follows: grinding wheel speed 240r/min ~ 350r/min, workpiece
Revolving speed 20r/min ~ 48r/min, guide wheel revolving speed 60r/min ~ 94r/min, 2 ° 30 ' ~ 3 ° 35 ' of guide wheel inclination angle, grinding depth
0.002mm ~0.005mm；
Step 9, hard anodizing carry out hard anodizing processing to the whole of the blank, and oxidated layer thickness is
0.035mm~0.06mm；
Step 10, fine cylindrical are partly refined the outer circle of the blank using GC80 grinding wheel, make table on high accuracy centerless grinding machine
Surface roughness Ra≤0.2, remaining is to layout design size, grinding parameter are as follows: grinding wheel speed 240r/min ~ 350r/min, workpiece
Revolving speed 20r/min ~ 48r/min, guide wheel revolving speed 40r/min, 2 ° 30 ' ~ 3 ° 35 ' of guide wheel inclination angle, grinding depth 0.002mm ~
0.005mm；
Step 11, the both ends of the surface that the blank is refined on surface grinding machine add on numerically controlled lathe respectively to layout design size
The threaded hole at blank both ends described in work examines each size, completes processing.
It is further characterized by:
In the step 1, the Vehicle Processing parameter at the both ends of the blank are as follows: workpiece rotational frequency 800r/min, feed rate 0.8mm/r；
The parameter of the drill centers are as follows: high-speed steel centre drill revolving speed 1900r/min.
In the step 2, the Vehicle Processing parameter of the outer circle of the blank are as follows: workpiece rotational frequency: 800r/min, feed rate:
0.8mm/r。
In the step 4, lubricated in process of lapping with a small amount of diesel oil or light machine oil.
In the step 5, the Vehicle Processing parameter of half fine turning outer circle are as follows: workpiece rotational frequency 2200r/min ~ 2500r/min, feeding
0.08 r/min ~ 0.12mm/r is measured, is fully cooled and is lubricated with the dedicated cutting fluid of aluminium alloy in cutting process.
In the step 8, step 10 and step 11, the coolant liquid that grinding process uses is ordinary diesel oil and lubrication oil base
It reconciles.
In the step 9, the parameter of hard anodizing are as follows: initial current 0.5A/dm2 ~ 1.5A/dm2, by 17min ~
It is gradually increased to 2.5A/dm2 ~ 30A/dm2 after 20min, keeps 50min ~ 90min.
The beneficial effects of the present invention are: can effectively ensure that piston rod using processing technology machining piston bar of the invention
Cylindricity≤0.002, straightness≤0.008, surface roughness Ra≤0.2, machining accuracy is high, and due to have passed through at timeliness
Reason, workpiece size are stablized, high yield rate, and hard anodizing processing can be improved the wear-resisting property of piston rod, while this technique
Manufacturing cost it is relatively low.
Detailed description of the invention
Fig. 1 is a kind of existing piston rod construction schematic diagram of Stirling engine gas distribution piston.
Specific embodiment
A kind of processing technology of the piston rod of Stirling engine gas distribution piston of the invention comprising following steps:
Step 1, blank preprocessing carry out blanking using 6061 aluminum alloy round bars of T6 state as blank, in high precision numerical control
On lathe, the outer circle of blank is clamped with three-jaw self-centering chuck, with the both ends of high-speed steelknife Vehicle Processing blank, machined parameters are as follows:
Workpiece rotational frequency 800r/min, feed rate 0.8mm/r make blank reserve 1mm machining allowance in length；High-speed steel center is used simultaneously
It bores and distinguishes drill centers, the revolving speed 1900r/min of high-speed steel centre drill in the both ends of the surface of blank；
Step 2, rough turn outer circle clamp one end of blank with three-jaw self-centering chuck on high precision digital control lathe, top to withstand
Centre bore on the other end of blank, with the outer circle of high-speed steelknife Vehicle Processing blank, turn around Che great Yuan again after the complete roundlet rod segment of vehicle
Rod segment, Vehicle Processing parameter are as follows: workpiece rotational frequency 800r/min, feed rate 0.8mm/r, the roundlet rod segment of blank and big round rod segment difference
Reserve the machining allowance of 0.5mm；
Blank after rough turn outer circle is placed on and stands 3 days at room temperature, by ageing treatment, can reduce by step 3, ageing treatment
Stress is participated in, dimensional stability is improved；
Step 4 repairs center lapping, on high precision digital control lathe, is carried out with oilstone or elastic grinding wheel to the centre bore on blank
It grinds, is lubricated in process of lapping with a small amount of diesel oil or light machine oil；
Step 5, half fine turning outer circle clamp one end of blank, top top with three-jaw self-centering chuck on high precision digital control lathe
The firmly centre bore on the other end of blank is turned around after the complete roundlet rod segment of vehicle using the outer circle of half finishing processing blank of diamond blade
The big round rod segment of vehicle again, the Vehicle Processing parameter of half fine turning outer circle are as follows: workpiece rotational frequency 2200r/min ~ 2500r/min, the amount of feeding 0.08
R/min ~ 0.12mm/r is fully cooled and is lubricated with the dedicated cutting fluid of aluminium alloy in cutting process, the roundlet rod segment of blank and big
Round rod segment reserves the machining allowance of 0.12mm ~ 0.2mm respectively；
Step 6, fine turning outer circle clamp one end of blank with three-jaw self-centering chuck on high precision digital control lathe, top to withstand
Centre bore on the other end of blank, using the outer circle of diamond blade finishing processing blank, turn around vehicle again after the complete roundlet rod segment of vehicle
Big round rod segment, machined parameters are as follows: speed of mainshaft 2200r/min ~ 2500r/min, amount of feeding 0.02mm/r ~ 0.04mm/r, cutting
It is fully cooled and is lubricated with the dedicated cuttings liquid of aluminium alloy in the process, the roundlet rod segment of blank and big round rod segment reserve 0.02mm respectively
The machining allowance of ~ 0.05mm；
Step 7, smart car both ends of the surface on the basis of the blank outer circle good by smart car, use diamond blade on high precision digital control lathe
The both ends of the surface of finishing processing blank, machined parameters are consistent with fine turning outer circle parameter, machining allowance 0.2mm；
Step 8, half fine cylindrical are refined the outer circle of blank using GC80 grinding wheel half, keep surface thick on high accuracy centerless grinding machine
Rugosity Ra≤0.4, remaining is to layout design size, grinding parameter are as follows: grinding wheel speed 240r/min ~ 350r/min, workpiece rotational frequency
20r/min ~ 48r/min, guide wheel revolving speed 60r/min ~ 94r/min, 2 ° 30 ' ~ 3 ° 35 ' of guide wheel inclination angle, grinding depth 0.002mm
~ 0.005mm, the coolant liquid that grinding process uses are ordinary diesel oil and lubricating oil keynote and form, not only guaranteed cooling effect but also
It can guarantee sufficient lubrication, filtration system paper tape filter, and keep recirculated water clean；High accuracy centerless grinding machine can be selected platform and grind
The TYC-12 type high-precision centreless grinding of accurate Science and Technology Ltd.；
Step 9, hard anodizing carry out hard anodizing processing, the parameter of hard anodizing to the whole of blank are as follows:
Initial current 0.5A/dm2 ~ 1.5A/dm2 is gradually increased to 2.5A/dm2 ~ 30A/dm2 after 17min ~ 20min, keeps 50min
~ 90min, oxidated layer thickness are 0.035mm ~ 0.06mm；
Step 10, fine cylindrical are refined the outer circle of blank using GC80 grinding wheel half, keep surface thick on high accuracy centerless grinding machine
Rugosity Ra≤0.2, remaining is to layout design size, grinding parameter are as follows: grinding wheel speed 240r/min ~ 350r/min, workpiece rotational frequency
20r/min ~ 48r/min, guide wheel revolving speed 40r/min, 2 ° 30 ' ~ 3 ° 35 ' of guide wheel inclination angle, 0.002 mm of grinding depth ~
0.005mm, the coolant liquid that grinding process uses are ordinary diesel oil and lubricating oil keynote and form；
Step 11, on surface grinding machine refine blank both ends of the surface to layout design size, the coolant liquid that grinding process uses is equal
For ordinary diesel oil and lubricating oil keynote and form；It drills, the threaded hole at tapping blank both ends, examines each respectively on numerically controlled lathe
Size, wherein the micrometer of diameter of piston rod 0.002mm precision detects, and cylindricity, straightness, verticality are surveyed with three coordinates
Instrument detection is measured, oxidated layer thickness is detected with 4100 type calibrator of mintest, and hardening oxidation layer hardness is detected with microhardness tester,
Length is detected with electronic digital indicator, and roughness is detected with electric profile apparatus, and thread rate is detected with external thread gauge, and detection is closed
Lattice complete processing.
It is below specific embodiment.
Embodiment 1
The processing technology of the piston rod of Stirling engine gas distribution piston, comprising the following steps:
Step 1, blank preprocessing carry out blanking using 6061 aluminum alloy round bars of T6 state as blank, in high precision numerical control
On lathe, the outer circle of blank is clamped with three-jaw self-centering chuck, with the both ends of high-speed steelknife Vehicle Processing blank, machined parameters are as follows:
Workpiece rotational frequency 800r/min, feed rate 0.8mm/r make blank reserve 1mm machining allowance in length；High-speed steel center is used simultaneously
It bores and distinguishes drill centers, the revolving speed 1900r/min of high-speed steel centre drill in the both ends of the surface of blank；
Step 2, rough turn outer circle clamp one end of blank with three-jaw self-centering chuck on high precision digital control lathe, top to withstand
Centre bore on the other end of blank, with the outer circle of high-speed steelknife Vehicle Processing blank, turn around Che great Yuan again after the complete roundlet rod segment of vehicle
Rod segment, Vehicle Processing parameter are as follows: workpiece rotational frequency 800r/min, feed rate 0.8mm/r, the roundlet rod segment of blank and big round rod segment difference
Reserve the machining allowance of 0.5mm；
Blank after rough turn outer circle is placed on and stands 3 days at room temperature, by ageing treatment, can reduce by step 3, ageing treatment
Stress is participated in, dimensional stability is improved；
Step 4 repairs center lapping, on high precision digital control lathe, is carried out with oilstone or elastic grinding wheel to the centre bore on blank
It grinds, is lubricated in process of lapping with a small amount of diesel oil or light machine oil；
Step 5, half fine turning outer circle clamp one end of blank, top top with three-jaw self-centering chuck on high precision digital control lathe
The firmly centre bore on the other end of blank is turned around after the complete roundlet rod segment of vehicle using the outer circle of half finishing processing blank of diamond blade
The big round rod segment of vehicle again, the Vehicle Processing parameter of half fine turning outer circle are as follows: workpiece rotational frequency 2200r/min, amount of feeding 0.08r/min, cutting
It is fully cooled and is lubricated with the dedicated cutting fluid of aluminium alloy in the process, the roundlet rod segment of blank and big round rod segment reserve 0.12mm respectively
Machining allowance；
Step 6, fine turning outer circle clamp one end of blank with three-jaw self-centering chuck on high precision digital control lathe, top to withstand
Centre bore on the other end of blank, using the outer circle of diamond blade finishing processing blank, turn around vehicle again after the complete roundlet rod segment of vehicle
Big round rod segment, machined parameters are as follows: speed of mainshaft 2200r/min, amount of feeding 0.02mm/r are cut with aluminium alloy is dedicated in cutting process
Bits liquid is fully cooled and lubricates, and the roundlet rod segment of blank and big round rod segment reserve the machining allowance of 0.02mm respectively；
Step 7, smart car both ends of the surface on the basis of the blank outer circle good by smart car, use diamond blade on high precision digital control lathe
The both ends of the surface of finishing processing blank, machined parameters are consistent with fine turning outer circle parameter, machining allowance 0.2mm；
Step 8, half fine cylindrical refine the outer circle of blank using GC80 grinding wheel half on TYC-12 type high accuracy centerless grinding machine,
Make surface roughness Ra≤0.4, remaining is to layout design size, grinding parameter are as follows: grinding wheel speed 240r/min, workpiece rotational frequency
20r/min, guide wheel revolving speed 60r/min, 2 ° 30 ', grinding depth 0.002mm of guide wheel inclination angle, the coolant liquid that grinding process uses
It is ordinary diesel oil and lubricating oil keynote and form, filtration system paper tape filter, and keeps recirculated water clean；
Step 9, hard anodizing carry out hard anodizing processing, the parameter of hard anodizing to the whole of blank are as follows:
Initial current 0.5A/dm2 is gradually increased to 2.5A/dm2 after 17min, keeps 50min, oxidated layer thickness 0.035mm；
Step 10, fine cylindrical refine the outer circle of blank using GC80 grinding wheel half on TYC-12 type high accuracy centerless grinding machine,
Make surface roughness Ra≤0.2, remaining is to layout design size, grinding parameter are as follows: grinding wheel speed 240r/min, workpiece rotational frequency
20r/min, guide wheel revolving speed 40r/min, 2 ° 30 ', grinding depth 0.002mm of guide wheel inclination angle, the coolant liquid that grinding process uses
It is ordinary diesel oil and lubricating oil keynote and form；
Step 11, on surface grinding machine refine blank both ends of the surface to layout design size, the coolant liquid that grinding process uses is equal
For ordinary diesel oil and lubricating oil keynote and form；It drills respectively on numerically controlled lathe, the threaded hole at tapping blank both ends, through examining
It tests, the cylindricity < 0.002 of piston rod, straightness < 0.008, surface roughness Ra < 0.2, size qualification.
Embodiment 2
The processing technology of the piston rod of Stirling engine gas distribution piston, comprising the following steps:
Step 1, blank preprocessing carry out blanking using 6061 aluminum alloy round bars of T6 state as blank, in high precision numerical control
On lathe, the outer circle of blank is clamped with three-jaw self-centering chuck, with the both ends of high-speed steelknife Vehicle Processing blank, machined parameters are as follows:
Workpiece rotational frequency 800r/min, feed rate 0.8mm/r make blank reserve 1mm machining allowance in length；High-speed steel center is used simultaneously
It bores and distinguishes drill centers, the revolving speed 1900r/min of high-speed steel centre drill in the both ends of the surface of blank；
Step 2, rough turn outer circle clamp one end of blank with three-jaw self-centering chuck on high precision digital control lathe, top to withstand
Centre bore on the other end of blank, with the outer circle of high-speed steelknife Vehicle Processing blank, turn around Che great Yuan again after the complete roundlet rod segment of vehicle
Rod segment, Vehicle Processing parameter are as follows: workpiece rotational frequency 800r/min, feed rate 0.8mm/r, the roundlet rod segment of blank and big round rod segment difference
Reserve the machining allowance of 0.5mm；
Blank after rough turn outer circle is placed on and stands 3 days at room temperature, by ageing treatment, can reduce by step 3, ageing treatment
Stress is participated in, dimensional stability is improved；
Step 4 repairs center lapping, on high precision digital control lathe, is carried out with oilstone or elastic grinding wheel to the centre bore on blank
It grinds, is lubricated in process of lapping with a small amount of diesel oil or light machine oil；
Step 5, half fine turning outer circle clamp one end of blank, top top with three-jaw self-centering chuck on high precision digital control lathe
The firmly centre bore on the other end of blank is turned around after the complete roundlet rod segment of vehicle using the outer circle of half finishing processing blank of diamond blade
The big round rod segment of vehicle again, the Vehicle Processing parameter of half fine turning outer circle are as follows: workpiece rotational frequency 2350r/min, amount of feeding 0.1r/min were cut
The dedicated cutting fluid of Cheng Zhongyong aluminium alloy is fully cooled and lubricates, and the roundlet rod segment of blank and big round rod segment reserve 0.16mm's respectively
Machining allowance；
Step 6, fine turning outer circle clamp one end of blank with three-jaw self-centering chuck on high precision digital control lathe, top to withstand
Centre bore on the other end of blank, using the outer circle of diamond blade finishing processing blank, turn around vehicle again after the complete roundlet rod segment of vehicle
Big round rod segment, machined parameters are as follows: speed of mainshaft 2350r/min, amount of feeding 0.03mm/r are cut with aluminium alloy is dedicated in cutting process
Bits liquid is fully cooled and lubricates, and the roundlet rod segment of blank and big round rod segment reserve the machining allowance of 0.035mm respectively；
Step 7, smart car both ends of the surface on the basis of the blank outer circle good by smart car, use diamond blade on high precision digital control lathe
The both ends of the surface of finishing processing blank, machined parameters are consistent with fine turning outer circle parameter, machining allowance 0.2mm；
Step 8, half fine cylindrical refine the outer circle of blank using GC80 grinding wheel half on TYC-12 type high accuracy centerless grinding machine,
Make surface roughness Ra≤0.4, remaining is to layout design size, grinding parameter are as follows: grinding wheel speed 280r/min, workpiece rotational frequency
34r/min, guide wheel revolving speed 77r/min, 3 °, grinding depth 0.003mm of guide wheel inclination angle, the coolant liquid that grinding process uses are
It ordinary diesel oil and lubricating oil keynote and forms, filtration system paper tape filter, and keeps recirculated water clean；
Step 9, hard anodizing carry out hard anodizing processing, the parameter of hard anodizing to the whole of blank are as follows:
Initial current 1A/dm2 is gradually increased to 16A/dm2 after 18min, keeps 70min, oxidated layer thickness 0.045mm；
Step 10, fine cylindrical refine the outer circle of blank using GC80 grinding wheel half on TYC-12 type high accuracy centerless grinding machine,
Make surface roughness Ra≤0.2, remaining is to layout design size, grinding parameter are as follows: grinding wheel speed 280r/min, workpiece rotational frequency
34r/min, guide wheel revolving speed 40r/min, 3 °, grinding depth 0.003mm of guide wheel inclination angle, the coolant liquid that grinding process uses are
It ordinary diesel oil and lubricating oil keynote and forms；
Step 11, on surface grinding machine refine blank both ends of the surface to layout design size, the coolant liquid that grinding process uses is equal
For ordinary diesel oil and lubricating oil keynote and form；It drills respectively on numerically controlled lathe, the threaded hole at tapping blank both ends, through examining
It tests, the cylindricity < 0.002 of piston rod, straightness < 0.008, surface roughness < 0.2, size qualification.
Embodiment 3
The processing technology of the piston rod of Stirling engine gas distribution piston, comprising the following steps:
Step 1, blank preprocessing carry out blanking using 6061 aluminum alloy round bars of T6 state as blank, in high precision numerical control
On lathe, the outer circle of blank is clamped with three-jaw self-centering chuck, with the both ends of high-speed steelknife Vehicle Processing blank, machined parameters are as follows:
Workpiece rotational frequency 800r/min, feed rate 0.8mm/r make blank reserve 1mm machining allowance in length；High-speed steel center is used simultaneously
It bores and distinguishes drill centers, the revolving speed 1900r/min of high-speed steel centre drill in the both ends of the surface of blank；
Step 2, rough turn outer circle clamp one end of blank with three-jaw self-centering chuck on high precision digital control lathe, top to withstand
Centre bore on the other end of blank, with the outer circle of high-speed steelknife Vehicle Processing blank, turn around Che great Yuan again after the complete roundlet rod segment of vehicle
Rod segment, Vehicle Processing parameter are as follows: workpiece rotational frequency 800r/min, feed rate 0.8mm/r, the roundlet rod segment of blank and big round rod segment difference
Reserve the machining allowance of 0.5mm；
Blank after rough turn outer circle is placed on and stands 3 days at room temperature, by ageing treatment, can reduce by step 3, ageing treatment
Stress is participated in, dimensional stability is improved；
Step 4 repairs center lapping, on high precision digital control lathe, is carried out with oilstone or elastic grinding wheel to the centre bore on blank
It grinds, is lubricated in process of lapping with a small amount of diesel oil or light machine oil；
Step 5, half fine turning outer circle clamp one end of blank, top top with three-jaw self-centering chuck on high precision digital control lathe
The firmly centre bore on the other end of blank is turned around after the complete roundlet rod segment of vehicle using the outer circle of half finishing processing blank of diamond blade
The big round rod segment of vehicle again, the Vehicle Processing parameter of half fine turning outer circle are as follows: workpiece rotational frequency 2500r/min, amount of feeding 0.12r/min, cutting
It is fully cooled and is lubricated with the dedicated cutting fluid of aluminium alloy in the process, the roundlet rod segment of blank and big round rod segment reserve 0.2mm respectively
Machining allowance；
Step 6, fine turning outer circle clamp one end of blank with three-jaw self-centering chuck on high precision digital control lathe, top to withstand
Centre bore on the other end of blank, using the outer circle of diamond blade finishing processing blank, turn around vehicle again after the complete roundlet rod segment of vehicle
Big round rod segment, machined parameters are as follows: speed of mainshaft 2500r/min, amount of feeding 0.04mm/r are cut with aluminium alloy is dedicated in cutting process
Bits liquid is fully cooled and lubricates, and the roundlet rod segment of blank and big round rod segment reserve the machining allowance of 0.05mm respectively；
Step 7, smart car both ends of the surface on the basis of the blank outer circle good by smart car, use diamond blade on high precision digital control lathe
The both ends of the surface of finishing processing blank, machined parameters are consistent with fine turning outer circle parameter, machining allowance 0.2mm；
Step 8, half fine cylindrical refine the outer circle of blank using GC80 grinding wheel half on TYC-12 type high accuracy centerless grinding machine,
Make surface roughness Ra≤0.4, remaining is to layout design size, grinding parameter are as follows: grinding wheel speed 350r/min, workpiece rotational frequency
48r/min, guide wheel revolving speed 94r/min, 3 ° 35 ', grinding depth 0.005mm of guide wheel inclination angle, the coolant liquid that grinding process uses
It is ordinary diesel oil and lubricating oil keynote and form, filtration system paper tape filter, and keeps recirculated water clean；
Step 9, hard anodizing carry out hard anodizing processing, the parameter of hard anodizing to the whole of blank are as follows:
Initial current 1.5A/dm2 is gradually increased to 30A/dm2 after 20min, keeps 90min, oxidated layer thickness 0.06mm；
Step 10, fine cylindrical refine the outer circle of blank using GC80 grinding wheel half on TYC-12 type high accuracy centerless grinding machine,
Make surface roughness Ra≤0.2, remaining is to layout design size, grinding parameter are as follows: grinding wheel speed 350r/min, workpiece rotational frequency
48r/min, guide wheel revolving speed 40r/min, 3 ° 35 ', grinding depth 0.005mm of guide wheel inclination angle, the coolant liquid that grinding process uses
It is ordinary diesel oil and lubricating oil keynote and form；
Step 11, on surface grinding machine refine blank both ends of the surface to layout design size, the coolant liquid that grinding process uses is equal
For ordinary diesel oil and lubricating oil keynote and form；It drills respectively on numerically controlled lathe, the threaded hole at tapping blank both ends, through examining
It tests, the cylindricity < 0.002 of piston rod, straightness < 0.008, surface roughness < 0.2, size qualification.
Claims (7)
1. a kind of processing technology of the piston rod of Stirling engine gas distribution piston, it is characterised in that: itself the following steps are included:
Step 1, blank preprocessing carry out blanking using 6061 aluminum alloy round bars of T6 state as blank, in high precision numerical control
On lathe, the outer circle of the blank is clamped with three-jaw self-centering chuck, the both ends of the blank described in high-speed steelknife Vehicle Processing make institute
It states blank and reserves 1mm machining allowance in length, while being bored respectively in the both ends of the surface of the blank with high-speed steel centre drill
Heart hole；
Step 2, rough turn outer circle clamp one end of the blank with three-jaw self-centering chuck on high precision digital control lathe, top
Withstand the centre bore on the other end of the blank, the outer circle of the blank described in high-speed steelknife Vehicle Processing, the blank
Roundlet rod segment and big round rod segment reserve the machining allowance of 0.5mm respectively；
The blank after rough turn outer circle is placed on and stands 3 days at room temperature by step 3, ageing treatment；
Step 4 repairs center lapping, on high precision digital control lathe, with oilstone or elastic grinding wheel to the centre bore on the blank
It is ground；
Step 5, half fine turning outer circle clamp one end of the blank with three-jaw self-centering chuck on high precision digital control lathe, top
The centre bore on the other end of blank is stated in pinnacle residence, uses the outer circle of blank described in half finishing processing of diamond blade, institute
The roundlet rod segment and big round rod segment of stating blank reserve the machining allowance of 0.12mm ~ 0.2mm respectively；
Step 6, fine turning outer circle clamp one end of the blank with three-jaw self-centering chuck on high precision digital control lathe, top
The centre bore on the other end of the blank is withstood, the outer circle of blank described in diamond blade finishing processing, processing ginseng are used
Number are as follows: speed of mainshaft 2200r/min ~ 2500r/min, amount of feeding 0.02mm/r ~ 0.04mm/r, it is special with aluminium alloy in cutting process
It is fully cooled and is lubricated with cuttings liquid, the roundlet rod segment of the blank and big round rod segment reserve adding for 0.02mm ~ 0.05mm respectively
Spare time amount；
Step 7, smart car both ends of the surface on the basis of the blank outer circle good by smart car, use diamond on high precision digital control lathe
The both ends of the surface of blank described in blade finishing processing, machined parameters are consistent with fine turning outer circle parameter, machining allowance 0.2mm；
Step 8, half fine cylindrical are partly refined the outer circle of the blank using GC80 grinding wheel, make table on high accuracy centerless grinding machine
Surface roughness Ra≤0.4, remaining is to layout design size, grinding parameter are as follows: grinding wheel speed 240r/min ~ 350r/min, workpiece
Revolving speed 20r/min ~ 48r/min, guide wheel revolving speed 60r/min ~ 94r/min, 2 ° 30 ' ~ 3 ° 35 ' of guide wheel inclination angle, grinding depth
0.002 mm~0.005mm；
Step 9, hard anodizing carry out hard anodizing processing to the whole of the blank, and oxidated layer thickness is
0.035mm~0.06mm；
Step 10, fine cylindrical are partly refined the outer circle of the blank using GC80 grinding wheel, make table on high accuracy centerless grinding machine
Surface roughness Ra≤0.2, remaining is to layout design size, grinding parameter are as follows: grinding wheel speed 240r/min ~ 350r/min, workpiece
Revolving speed 20r/min ~ 48r/min, guide wheel revolving speed 40r/min, 2 ° 30 ' ~ 3 ° 35 ' of guide wheel inclination angle, grinding depth 0.002mm ~
0.005mm；
Step 11, the both ends of the surface that the blank is refined on surface grinding machine add on numerically controlled lathe respectively to layout design size
The threaded hole at blank both ends described in work examines each size, completes processing.
2. a kind of processing technology of the piston rod of Stirling engine gas distribution piston according to claim 1, feature
It is: in the step 1, the Vehicle Processing parameter at the both ends of the blank are as follows: workpiece rotational frequency 800r/min, feed rate 0.8mm/r；
The parameter of the drill centers are as follows: high-speed steel centre drill revolving speed 1900r/min.
3. a kind of processing technology of the piston rod of Stirling engine gas distribution piston according to claim 1, feature
It is: in the step 2, the Vehicle Processing parameter of the outer circle of the blank are as follows: workpiece rotational frequency: 800r/min, feed rate: 0.8mm/
r。
4. a kind of processing technology of the piston rod of Stirling engine gas distribution piston according to claim 1, feature
It is in the step 4, is lubricated in process of lapping with a small amount of diesel oil or light machine oil.
5. a kind of processing technology of the piston rod of Stirling engine gas distribution piston according to claim 1, feature
It is: in the step 5, the Vehicle Processing parameter of half fine turning outer circle are as follows: workpiece rotational frequency 2200r/min ~ 2500r/min, the amount of feeding
0.08 r/min ~ 0.12mm/r is fully cooled and is lubricated with the dedicated cutting fluid of aluminium alloy in cutting process.
6. a kind of processing technology of the piston rod of Stirling engine gas distribution piston according to claim 1, feature
Be: in the step 8, step 10 and step 11, the coolant liquid that grinding process uses is ordinary diesel oil and lubricating oil keynote
With form.
7. a kind of processing technology of the piston rod of Stirling engine gas distribution piston according to claim 1, feature
Be: in the step 9, the parameter of hard anodizing are as follows: initial current 0.5A/dm2 ~ 1.5A/dm2, by 17min ~
It is gradually increased to 2.5A/dm2 ~ 30A/dm2 after 20min, keeps 50min ~ 90min.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719311A (en) * | 2020-12-29 | 2021-04-30 | 沈阳黎明航空零部件制造有限公司 | Process method for precisely machining piston rod part of actuator cylinder of aero-engine |
| CN112792719A (en) * | 2020-12-28 | 2021-05-14 | 大连长丰实业总公司 | Mirror finishing method for hard anodized surface of aluminum alloy |
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| WO2015013970A1 (en) * | 2013-08-02 | 2015-02-05 | 恒川国际股份有限公司 | Water tap water-control spool and method for manufacturing same |
| CN105537885A (en) * | 2016-03-03 | 2016-05-04 | 布志刚 | Machining method of valve element |
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| CN102825431A (en) * | 2012-09-07 | 2012-12-19 | 贵州凯星液力传动机械有限公司 | Machining method of high-abrasion resistance valve core |
| WO2015013970A1 (en) * | 2013-08-02 | 2015-02-05 | 恒川国际股份有限公司 | Water tap water-control spool and method for manufacturing same |
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| CN112792719A (en) * | 2020-12-28 | 2021-05-14 | 大连长丰实业总公司 | Mirror finishing method for hard anodized surface of aluminum alloy |
| CN112719311A (en) * | 2020-12-29 | 2021-04-30 | 沈阳黎明航空零部件制造有限公司 | Process method for precisely machining piston rod part of actuator cylinder of aero-engine |
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