CN105889059B - A kind of hollow plunger processing technology - Google Patents
A kind of hollow plunger processing technology Download PDFInfo
- Publication number
- CN105889059B CN105889059B CN201610380130.1A CN201610380130A CN105889059B CN 105889059 B CN105889059 B CN 105889059B CN 201610380130 A CN201610380130 A CN 201610380130A CN 105889059 B CN105889059 B CN 105889059B
- Authority
- CN
- China
- Prior art keywords
- plunger
- column
- cylindrical cavity
- end cap
- plunger bushing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005516 engineering process Methods 0.000 title claims abstract description 15
- 229910000679 solder Inorganic materials 0.000 claims abstract description 4
- 125000006850 spacer group Chemical group 0.000 claims description 36
- 238000003466 welding Methods 0.000 claims description 23
- 239000002994 raw material Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000010791 quenching Methods 0.000 claims description 9
- 230000000171 quenching effect Effects 0.000 claims description 9
- 238000005496 tempering Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000003607 modifier Substances 0.000 claims description 8
- 238000007514 turning Methods 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 3
- 238000005121 nitriding Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 abstract description 6
- 239000011800 void material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
-
- 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
- B23P15/10—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass pistons
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Heat Treatment Of Articles (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a kind of hollow plunger and its processing technologys,Solve the problems, such as that the high and full void column plug Iinvalid volume of solid plunger quality is big,Its key points of the technical solution are that,The plunger bushing of bulb is extended with including plunger core and one end,The one end of plunger bushing far from bulb offers cylindrical cavity along the length direction of plunger bushing,Plunger core includes end cap and is fixed on the center of circle of end cap and perpendicular to the outwardly extending column in the end face of end cap,The outer diameter of column is less than the internal diameter of cylindrical cavity,Column is arranged in cylindrical cavity and the end of column is connected by the bottom surface center of circle of solder joint and cylindrical cavity,The lid conjunction face edge of end cap is connected by the opening edge of weld seam and cylindrical cavity edge,A kind of hollow plunger and its processing technology of the present invention,The fixation of end cap and plunger bushing to form airtight chamber between cylindrical cavity and end cap,So as to reduce the quality of plunger,Avoiding the larger torque that plunger centrifugal force generates causes cylinder body to topple,To increase the service life of plunger pump.
Description
Technical field
The present invention relates to hydraulic systems to perform component technical field, more particularly to a kind of hollow plunger processing technology.
Background technology
Plunger directly affects the quality of plunger pump as part most crucial in plunger pump.Plunger can divide according to structure
For solid plunger and hollow plunger.
If plunger is made solid parts, weight will greatly increase, the larger torque pole generated by plunger centrifugal force
It easily leads to cylinder body to topple, so as to influence the service life of plunger pump.
If plunger is helped hollow-core construction, although structure is simpler, cavity therein increases the nothing in cylinder barrel
It is ready to give one's life for a cause volume, the compressibility of working media is made to aggravate, therefore existing plunger also exists the adverse effect that volumetric efficiency generates
Certain room for improvement.
Invention content
The object of the present invention is to provide a kind of hollow plungers, can reduce the quality and inertia force of plunger, and can
Reduce the Iinvalid volume of plunger.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of hollow plunger is extended with the plunger bushing of bulb including plunger core and one end, and the plunger bushing is far from bulb
One end offers cylindrical cavity along the length direction of plunger bushing, and the plunger core includes end cap and is fixed on the center of circle of end cap simultaneously
And perpendicular to the outwardly extending column in the end face of end cap, the outer diameter of the column is less than the internal diameter of cylindrical cavity, and the column is worn
It is connected set on the end of cylindrical cavity and column by the bottom surface center of circle of solder joint and cylindrical cavity, the lid of the end cap closes face edge
It is connected by the opening edge of weld seam and cylindrical cavity edge.
Using the above scheme, the fixation of end cap and plunger bushing to form airtight chamber between cylindrical cavity and end cap,
So as to reduce the quality of plunger, avoid the larger torque that plunger centrifugal force generates that cylinder body is caused to topple, to increase plunger pump
Service life；The column being arranged in cylindrical cavity can reduce the invalid dead volume in plunger bushing, increase volumetric efficiency, with
Adverse effect of the compressibility to volumetric efficiency of working media is reduced, column can also play the role of support so that plunger is being transported
End cap will not sink during row, increase the structural strength of plunger.
Preferably, the direction of lid conjunction face edge towards the bulb of the end cap is axially extended with flange, the flange
Outer diameter is consistent with the outer diameter of plunger bushing, and internal diameter is consistent with the internal diameter of plunger bushing, and the edge of the flange passes through weld seam and column
The opening edge edge connection of cavity.
Using the above scheme, flange causes end cap when being welded on plunger bushing, end cap will not directly with plunger bushing phase
Contact leaves welding space so that end cap will not be lost due to weld seam.
Preferably, the one end of the column far from end cap is arranged with piston spacer, the uprights vertical is in piston spacer
Plane, the bottom surface of the piston spacer and cylindrical cavity maintains gap, and the outer circle of the piston spacer is tightly attached to column sky
The inner circle of chamber.
Using the above scheme, if without piston spacer, when end cap on plunger bushing when being welded, column can be due to vibration
Run-off the straight makes the position of column generate offset, causes the whole center of gravity of plunger that deviation occurs；The setting of piston spacer plays
The effect of vertical columns, when end cap is in welding, column is threaded through in cylindrical cavity, and at this moment the edge of piston spacer is supported in column
The side wall of shape cavity so that column end when being welded can be fixed, and inclination and position offset is not susceptible to, so as to increase
Welding precision is added.
Preferably, the column is arranged in the center location of piston spacer.
Using the above scheme so that the distance between the edge of piston spacer and column center can be consistent, and be increased
The balance of piston spacer, further promotes its fixed effect.
Preferably, the one end of the column far from end cap is extended with the shaft shoulder, the outer diameter of the shaft shoulder is less than the outer of column
Diameter, the center of the piston spacer offer third perforation, and the shaft shoulder is arranged in third perforation, and the shaft shoulder is worn by third
Hole is fixed with piston spacer.
Using the above scheme so that a ring ladder is formd between the shaft shoulder and column, when piston spacer passes through third
Perforation set is set to after the shaft shoulder, and the ring ladder formed between the shaft shoulder and column plays position-limiting action, enables piston spacer
The optimum position of column is positioned in, avoids influencing the locating effect of piston spacer.
Preferably, the central axial of the column offers the first perforation, the central axial of the bulb offers
Two perforation, first perforation extend to end cap by one end of proximal cover, and the described one end of first perforation far from end cap passes through axis
Shoulder extends to the second perforation and is connected with the second perforation.
Using the above scheme, first perforation with second perforation in can store fluid so that plunger during movement,
Fluid can perforate from interconnected first with being flowed back and forth at the second perforation, so as to play the role of lubricating plunger, to increase
Add the service life of plunger pump.
Preferably, a kind of processing technology for processing hollow plunger, the processing technology of plunger bushing include the following steps：
The first step：Choose raw material, the bar that raw material selection material is 38CrMoALA, specification is 30；
Second step：Blanking, there are 1.5 millimeters of length surpluses compared to standard size for blank size；
Third walks：Heat treatment process, modifier treatment are carried out to the raw material in second step, quenching and tempering hardness is HRC24~26 degree；
4th step：Roughing processing is carried out to raw material, is justified out by measuring truck wheeled litter, to obtain the cylinder of plunger bushing；
5th step：Drilling operation drills out the cylindrical cavity of plunger bushing by vertical drill；
6th step：The bottom surface depth of cylindrical cavity is processed by flat processing using center lathe, ensures size 60+
0.1/0 is consistent；
The processing technology of plunger core includes the following steps：
The first step：Choose raw material, the bar that raw material selection material is 38CrMoALA, specification is 30；
Second step：Blanking, there are 1.5 millimeters of length surpluses compared to standard size for blank size；
Third walks：Heat treatment process, modifier treatment are carried out to the raw material in second step, quenching and tempering hardness is HRC24~26 degree；
4th step：By numerically controlled lathe to third walk in bar carry out turning, with obtain the column of integrally connected with
End cap and extend flange on end cap；
5th step：The shaft shoulder is gone out from the end vehicle of column by instrument lathe；
The plunger bushing of completion of processing is assembled and welded with plunger core, is as follows：
The first step：Piston spacer is set to the shaft shoulder by third perforation set, until inconsistent with the end of column；
Second step：Plunger bushing is held in the rolling clamp of friction-welding machine, plunger core is held on the movement of friction-welding machine
In fixture, the central shaft of plunger core and plunger bushing is located at same straight line, and the end of column is opposite with the opening of cylindrical cavity；
Third walks：Soldering, with rotating speed 1400rpm, friction pressure 50MPa carries out stablizing 4 seconds rear brakings of friction welding
Braking；The upsetting force of 50MPa is kept while skidding, and keeps upsetting force 4 seconds, so that the end of column and column
The bottom surface of cavity is mutually fixed, while the end face of flange and the end face of plunger bushing are mutually fixed；
4th step：Destressing is handled, so that hardness reaches HRC26~28 degree；
5th step：Bulb roughing, by instrument lathe turning, to obtain the bulb of plunger bushing；
6th step：Aperture is bored, is drilled respectively in the end of plunger bushing and bulb by vertical drill, to obtain the first perforation and the
Two perforation；
7th step：The shape of bulb is finished by numerically controlled lathe；
8th step：Centreless grinding roughly grinds outer circle；
9th step：Nitrogen treatment, the hard nitriding furnace of well formula gas, surfaces nitrided hardness are HV900~1100 degree, nitrogenize deep layer
It is 0.3~0.5 millimeter；
Tenth step：Finishing processing is carried out to bulb by grinding；
11st step：High-precision centreless grinding processing excircles；
12nd step：High-precision super grinding processing excircles are to drawing size.
Using the above scheme, this be used to process hollow plunger technological operation it is simple, shorten technological process, processing cost
It is low, while high precision machining.
In conclusion the invention has the advantages that：
1st, the fixation of end cap and plunger bushing to form airtight chamber between cylindrical cavity and end cap, so as to reduce column
The quality of plug avoids the larger torque that plunger centrifugal force generates that cylinder body is caused to topple, to increase the service life of plunger pump；
2nd, the column being arranged in cylindrical cavity can reduce the invalid dead volume in plunger bushing, increase volumetric efficiency,
To reduce adverse effect of the compressibility to volumetric efficiency of working media, column can also play the role of support so that plunger exists
End cap will not sink in operational process, increase the structural strength of plunger；
3rd, it by the way that this structural measure is taken to provide possibility to mitigating plunger quality and reducing plunger inertia force, substantially improves
The dynamic characteristic of plunger pump；
4th, plunger core and plunger bushing are combined by the processing technology of the hollow plunger by using friction soldering processes, letter
Chemical industry skill reduces processing flow, under the premise of ensureing properties of product with quality, reduces production cost, while machining accuracy
It is high.
Description of the drawings
Fig. 1 is plunger bushing and the explosive view of plunger core in the present invention；
Fig. 2 is the enlarged diagram in A portions shown in Fig. 1；
Fig. 3 is the assembling schematic diagram of plunger bushing and plunger core in the present invention.
In figure：1st, plunger core；2nd, plunger bushing；3rd, bulb；4th, cylindrical cavity；5th, end cap；6th, column；7th, flange；8th, plunger
Gasket；9th, the shaft shoulder；10th, third is perforated；11st, the first perforation；12nd, the second perforation.
Specific embodiment
The present invention is described in further detail below in conjunction with attached drawing.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of no creative contribution after this specification is read, but as long as at this
It is all protected in the right of invention by Patent Law.
A kind of hollow plunger disclosed in the present embodiment, as shown in Figure 1, being extended with the column of bulb 3 including plunger core 1 and one end
Plug sleeve 2, the one end of plunger bushing 2 far from bulb 3 offer cylindrical cavity 4 along the length direction of plunger bushing 2, and plunger core 1 includes
End cap 5 and it is fixed on the center of circle of end cap 5 and perpendicular to the outwardly extending column 6 in the end face of end cap 5, the outer diameter of column 6 is less than
The internal diameter of cylindrical cavity 4, column 6 is arranged in cylindrical cavity 4 and the end of column 6 is justified by the bottom surface of solder joint and cylindrical cavity 4
The heart connects, and the lid conjunction face edge of end cap 5 is connect by weld seam with the opening edge edge of cylindrical cavity 4.
As shown in Figure 1, the lid conjunction face edge of end cap 5 is axially extended with flange 7, the outer diameter of flange 7 towards the direction of bulb 3
Consistent with the outer diameter of plunger bushing 2, internal diameter is consistent with the internal diameter of plunger bushing 2, and the edge of flange 7 passes through weld seam and cylindrical cavity 4
Opening edge along connection.
As shown in Fig. 2, the one end of column 6 far from end cap 5 is arranged with piston spacer 8, column 6 is perpendicular to piston spacer 8
Plane, piston spacer 8 and the bottom surface of cylindrical cavity 4 maintain gap, and the outer circle of piston spacer 8 is tightly attached to the interior of cylindrical cavity 4
Circle.The wherein cross sectional shape of piston spacer 8 and the cross sectional shape of cylindrical cavity 4 is consistent, so as to increase consolidating for piston spacer 8
Determine effect.Column 6 is arranged in the center location of piston spacer 8.
As shown in Fig. 2, the one end of column 6 far from end cap 5 is extended with the shaft shoulder 9, the outer diameter of the shaft shoulder 9 is less than the outer diameter of column 6,
The center of piston spacer 8 offers third perforation 10, and the shaft shoulder 9 is arranged in third perforation 10, and the shaft shoulder 9 passes through third perforation 10 and column
Choker block piece 8 is fixed.
As shown in Figure 1, the central axial of column 6 offers the first perforation 11, the central axial of bulb 3 offers second and wears
Hole 12, the first perforation 11 extend to end cap 5 by one end of proximal cover 5, and first 11 one end far from end cap 5 of perforation pass through the shaft shoulder 9
It extends to the second perforation 12 and is connected with the second perforation 12.
Be experimentally confirmed, under the operating pressure of 315bar, hollow plunger noise experiment data of the invention for≤
83dB, and traditional full void column plug is 88dB, can be obtained according to experimental result, low noise caused by hollow plunger of the invention
5dB。
The fluid minimum cylinder volume of hollow plunger is 95%, and full void column plug is 92%, can be obtained by experimental data, hollow structure
Volumetric efficiency improves 3% than full hollow structure；And the various performance curves of hollow plunger and full void column plug compared to also relatively it is flat
Surely, it fluctuates smaller.
The experimental results showed that using the plunger of hollow structure, compared to solid plunger weight saving 15%, and in Iinvalid volume
It reduces 5dB with enough rigidity, noise while reaching minimum and reaches 83dB, volumetric efficiency reaches 95%, and experimental index is excellent
In hydraulic axial plunger pump professional standard（JB/T 7043-2006）.
The processing technology of plunger bushing 2 includes the following steps：
The first step：Choose raw material, the bar that raw material selection material is 38CrMoALA, specification is 30；38CrMoALA
It is advanced nitrated steel, is mainly used for accurate in size after high-wearing feature, high-fatigue strength, high mechanical properties and heat treatment
Nitridation part or the various nitridation parts that load is little and wearability is high that are hit.
Second step：Original bar is cut in blanking using cutting machine, and convenient for following process, blank size is compared to standard
There are 1.5 millimeters of length surpluses for size.
Third walks：Heat treatment process, modifier treatment are carried out to the raw material in second step, quenching and tempering hardness is HRC24~26 degree；
Modifier treatment is the dual heat treatment that quenching increases temperature tempering, and the purpose is to workpiece is made to have good comprehensive mechanical performance.Heat
Treatment process includes the methods of annealing, normalizing, quenching, tempering and Surface heat-treatent.Wherein tempering again including modifier treatment and when
Effect processing.Quenched bar is reheated to certain temperature according to desirable mechanical performance（350 DEG C~650 DEG C）It
Between carry out, carbon be in the form of the cementite being carefully distributed be precipitated.With the increase of temperature, the particle of carbide just increases,
Yield point and tensile strength just decline, and reduce hardness and brittleness, elongation percentage and shrinking percentage just increase.The purpose is to eliminate quenching production
Raw internal stress, to obtain expected mechanical property.
4th step：Roughing processing is carried out to raw material, is justified out by measuring truck wheeled litter, to obtain the cylinder of plunger bushing 2；
Instrument lathe belongs to simple horizontal lathe, due to using hand propelled feed, collet quick-clamping, thimble-type limiting dress
Put, the operation of quick hand plate type, motor directly drives spindle operation, location control turning, to the workpiece of single fixed type with it is outer
Type carries out Continuous maching, and 10 times of work efficiency or more is improved than center lathe, especially suitable for high-volume, the processing of small part.It can
Instead of other lathes, to save energy consumption.
5th step：Drilling operation drills out the cylindrical cavity 4 of plunger bushing 2 by vertical drill；Drilling depth is in 60mm or so.
6th step：The bottom surface depth of cylindrical cavity 4 is processed by flat processing using center lathe, ensures size 60+
0.1/0 is consistent；The flat of cylindrical cavity 4 is milled out using milling cutter.
The processing technology of plunger core 1 includes the following steps：
The first step：Choose raw material, the bar that raw material selection material is 38CrMoALA, specification is 30；
Second step：Blanking, there are 1.5 millimeters of length surpluses compared to standard size for blank size；
Third walks：Heat treatment process, modifier treatment are carried out to the raw material in second step, quenching and tempering hardness is HRC24~26 degree；
4th step：By numerically controlled lathe to third walk in bar carry out turning, with obtain the column 6 of integrally connected with
End cap 5 and extend flange 7 on end cap 5；
5th step：The shaft shoulder 9 is gone out from the end vehicle of column 6 by instrument lathe.
The plunger bushing 2 of completion of processing is assembled and welded with plunger core 1, is as follows：
The first step：Piston spacer 8 by third is perforated 10 sets and is set to the shaft shoulder 9, until it is inconsistent with the end of column 6,
Wherein piston spacer 8 is interference fitted with the shaft shoulder 9.
Second step：Plunger bushing 2 is held in the rolling clamp of friction-welding machine, plunger core 1 is held on the shifting of friction-welding machine
In dynamic fixture, the central shaft of plunger core 1 and plunger bushing 2 is located at same straight line, and the end of column 6 and the opening of cylindrical cavity 4
Relatively；Friction welding (FW) is the solid welding method for realizing welding.Under pressure, i.e., constant or be incremented by pressure and torque
Under effect, frictional heat and plastic deformation are generated in rubbing surface and its near zone using the relative motion welded between contact face
Heat makes its near zone temperature rise the resistance of deformation of material be made to reduce, mould to the close but generally below temperature range of fusing point
Property improve, the oxidation film at interface crushes；Under the action of upsetting force, plastic deformation and flowing are generated with material, passes through boundary
The molecule in face spreads and recrystallizes and realize solid State Welding.Relatively traditional melting welding, friction welding (FW) have high excellent of quality of weld joint
Point, can reach weld strength and basis material equal strength, and welding efficiency height, stable quality, consistency are good, it can be achieved that dissimilar material
Welding etc..
Third walks：Soldering when being welded, opens friction-welding machine, and plunger bushing 2 carries out under the driving of rolling clamp
High-speed rotation, while piston spacer 8 is pushed into cylindrical cavity 4 by plunger core 1 under the driving of movable fixture, makes piston spacer
The inner wall at 8 edge and cylindrical cavity 4 is inconsistent, so as to play the role of vertical columns 6, prevents plunger core 1 in the mistake of welding
6 run-off the straight of journey central post or offset, considerably increase machining accuracy；When the end of column 6 is moved to the bottom with cylindrical cavity 4
When face mutually contacts, due to carrying out the relative motion of high speed between the two so that since friction generates greatly between two contact surfaces
The heat of amount, allows the material melts of near zone, under the action of upsetting force, makes underrun circle of column 6 and cylindrical cavity 4
The molecule in face spreads and recrystallizes and weld together；Meanwhile the end face of the flange 7 of end cap 5 and plunger bushing 2 is also because of relative friction
And generate heat so that the flange 7 of end cap 5 and the end face of plunger bushing 2 are also welded to together.
At runtime, with rotating speed 1400rpm, friction pressure 50MPa carries out stablizing 4 seconds rear brakings of friction welding friction-welding machine
Braking；The upsetting force of 50MPa is kept while skidding, and keeps upsetting force 4 seconds, so that the end of column 6 and column
The bottom surface of shape cavity 4 is mutually fixed, while the end face of flange 7 and the end face of plunger bushing 2 are mutually fixed.
4th step：Destressing is handled, so that hardness reaches HRC26~28 degree；
5th step：3 roughing of bulb, by instrument lathe turning, to obtain the bulb 3 of plunger bushing 2；
6th step：Aperture is bored, is drilled respectively in the end of plunger bushing 2 and bulb 3 by vertical drill, to obtain the first perforation 11
With the second perforation 12；It should be punched respectively from the end of the end face center of end cap 5 and bulb 3, wherein the first perforation 11 passes through column 6
Center 12 connect with the second perforation, and the aperture of the first perforation 11 be more than second perforate 12 aperture.
7th step：Pass through numerically controlled lathe to finish the shape of bulb 3 so that the size of bulb 3 is closer to drawing ruler
It is very little.
8th step：Centreless grinding roughly grinds outer circle, prepares for nitridation.
9th step：Nitrogen treatment, the hard nitriding furnace of well formula gas, surfaces nitrided hardness are HV900~1100 degree, nitrogenize deep layer
It is 0.3~0.5 millimeter；Nitrogen treatment refers to a kind of nitrogen-atoms at a certain temperature, in certain medium be made to penetrate into workpiece surface
Chemical heat treatment process.The product of via nitride processing has excellent wearability, fatigue durability, corrosion resistance and heat safe spy
Property.
Tenth step：Finishing processing is carried out to bulb 3 by grinding so that the surface of bulb 3 is more smooth with smoothing out.
11st step：High-precision centreless grinding processing excircles, to improve the precision of bulb 3.
12nd step：High-precision super grinding processing excircles are to drawing size.
Claims (1)
1. a kind of hollow plunger processing technology, it is characterized in that：Hollow plunger includes plunger core (1) and one end is extended with bulb (3)
Plunger bushing (2)；
The processing technology of plunger bushing (2) includes the following steps：
The first step：Choose raw material, the bar that raw material selection material is 38CrMoALA, specification is 30；
Second step：Blanking, there are 1.5 millimeters of length surpluses compared to standard size for blank size；
Third walks：Heat treatment process, modifier treatment are carried out to the raw material in second step, quenching and tempering hardness is HRC24~26 degree；
4th step：Roughing processing is carried out to raw material, is justified out by measuring truck wheeled litter, to obtain the cylinder of plunger bushing (2)；
5th step：Drilling operation drills out the cylindrical cavity (4) opened up along the length direction of plunger bushing (2) by vertical drill；
6th step：The bottom surface depth of cylindrical cavity (4) is processed by flat processing using center lathe, ensures size 60+
0.1/0 is consistent；
The processing technology of plunger core (1) includes the following steps：
The first step：Choose raw material, the bar that raw material selection material is 38CrMoALA, specification is 30；
Second step：Blanking, there are 1.5 millimeters of length surpluses compared to standard size for blank size；
Third walks：Heat treatment process, modifier treatment are carried out to the raw material in second step, quenching and tempering hardness is HRC24~26 degree；
4th step：Bar in being walked by numerically controlled lathe to third carries out turning, to obtain the column of integrally connected (6) and end
It lid (5) and extends the lid of end cap (5) and closes the axially extending flange (7) in direction of face edge towards bulb (3)；It is described convex
The outer diameter of edge (7) is consistent with the outer diameter of plunger bushing (2), and internal diameter is consistent with the internal diameter of plunger bushing (2), the side of the flange (7)
It is connect along by weld seam with the opening edge edge of cylindrical cavity (4)；Its central post（6）With end cap（5）In being arranged concentrically, the column
(6) outer diameter is less than the internal diameter of cylindrical cavity (4), and the one end of column (6) far from end cap (5) is arranged with piston spacer (8), stands
Column (6) is perpendicular to the plane of piston spacer (8), and the bottom surface of the piston spacer (8) and cylindrical cavity (4) maintains gap, institute
The outer circle for stating piston spacer (8) is tightly attached to the inner circle of cylindrical cavity (4), and the column (6) is arranged in the center of circle of piston spacer (8)
Position；
5th step：The shaft shoulder (9) is gone out from one end end vehicle of the column (6) far from end cap (5) by instrument lathe；The shaft shoulder (9)
Outer diameter be less than the outer diameter of column (6), the center of the piston spacer (8) offers third perforation (10), and the shaft shoulder (9) is worn
It perforates (10) set on third, the shaft shoulder (9) is perforated (10) by third and piston spacer (8) is fixed；
The plunger bushing (2) of completion of processing is assembled and welded with plunger core (1), is as follows：
The first step：Piston spacer (8) is set to the shaft shoulder (9) by third (10) set of perforating, until offseting with the end of column (6)
It touches；
Second step：Plunger bushing (2) is held in the rolling clamp of friction-welding machine, plunger core (1) is held on the shifting of friction-welding machine
In dynamic fixture, plunger core (1) and the central shaft of plunger bushing (2) are located at same straight line, and the end of column (6) and cylindrical cavity
(4) opening is opposite；The column (6) is arranged in cylindrical cavity (4) and the end of column (6) passes through solder joint and cylindrical cavity
(4) bottom surface center of circle connection, the lid of the end cap (5) close face edge and are connect by weld seam with the opening edge edge of cylindrical cavity (4)；
Third walks：Soldering, with rotating speed 1400rpm, friction pressure 50MPa carries out stablizing friction welding rear braking braking in 4 seconds；
The upsetting force of 50MPa is kept while skidding, and keeps upsetting force 4 seconds, so that the end of column (6) is empty with column
The bottom surface of chamber (4) is mutually fixed, while the end face of flange (7) and the end face of plunger bushing (2) are mutually fixed；
4th step：Destressing is handled, so that hardness reaches HRC26~28 degree；
5th step：Bulb (3) roughing, by instrument lathe turning, to obtain the bulb of plunger bushing (2) (3)；
6th step：Aperture is bored, is drilled respectively in the end of plunger bushing (2) and bulb (3) by vertical drill, to obtain column（6）'s
Central axial the first perforation (11) opened up and central axial the second perforation (12) opened up in bulb (3)；Described first
Perforation (11) extends to end cap (5) by one end of proximal cover (5), and the described one end of first perforation (11) far from end cap (5) passes through
The shaft shoulder (9) extends to the second perforation (12) and is connected with the second perforation (12)；
7th step：The shape of bulb (3) is finished by numerically controlled lathe；
8th step：Centreless grinding roughly grinds outer circle；
9th step：Nitrogen treatment, the hard nitriding furnace of well formula gas, surfaces nitrided hardness are HV900~1100 degree, and nitridation deep layer is
0.3~0.5 millimeter；
Tenth step：Finishing processing is carried out to bulb (3) by grinding；
11st step：High-precision centreless grinding processing excircles；
12nd step：High-precision super grinding processing excircles are to drawing size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610380130.1A CN105889059B (en) | 2016-05-31 | 2016-05-31 | A kind of hollow plunger processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610380130.1A CN105889059B (en) | 2016-05-31 | 2016-05-31 | A kind of hollow plunger processing technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105889059A CN105889059A (en) | 2016-08-24 |
| CN105889059B true CN105889059B (en) | 2018-07-03 |
Family
ID=56709861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610380130.1A Active CN105889059B (en) | 2016-05-31 | 2016-05-31 | A kind of hollow plunger processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105889059B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108176956A (en) * | 2016-12-08 | 2018-06-19 | 慈溪市龙山汽配有限公司 | A kind of piston machining process |
| CN109693081A (en) * | 2018-12-27 | 2019-04-30 | 江苏长龄液压股份有限公司 | The processing technology and structure of a kind of Intelligent central swivel joint center rotating shaft |
| CN113560811A (en) * | 2020-04-28 | 2021-10-29 | 仪征市峰业机械有限公司 | Optimized plunger sleeve processing technology |
| CN113182842B (en) * | 2021-03-30 | 2022-12-27 | 广州东阳立松模具制造有限公司 | Automatic assembly production line of spring plunger for automobile mould |
| CN114310155A (en) * | 2021-11-17 | 2022-04-12 | 中铁工程装备集团有限公司 | Method for processing waist drum-shaped plunger |
| CN114434104B (en) * | 2022-01-27 | 2023-04-25 | 宝玛医疗科技(无锡)有限公司 | Processing method of staple cartridge base for anastomat |
| CN114687978B (en) * | 2022-03-25 | 2024-03-12 | 宁波派锐森液压有限公司 | Plunger piston shoe and assembly process thereof |
| CN114893271B (en) * | 2022-06-07 | 2024-04-19 | 湖州通源机械零部件有限公司 | Production process of plug-in tappet welding structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0808988A1 (en) * | 1996-05-20 | 1997-11-26 | Brueninghaus Hydromatik Gmbh | Hollow piston with a radially welded cover |
| CN102814629A (en) * | 2011-06-10 | 2012-12-12 | 罗伯特·博世有限公司 | Method for manufacturing piston and piston used for piston machine |
| CN103711689A (en) * | 2014-01-09 | 2014-04-09 | 北京理工大学 | High pressure hydraulic pump plunger of hollow structure |
| CN204212972U (en) * | 2014-09-28 | 2015-03-18 | 宁波广天赛克思液压有限公司 | A kind of closed noise reduction hollow plunger |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10341791B4 (en) * | 2003-09-10 | 2005-09-29 | Brueninghaus Hydromatik Gmbh | Hollow piston for a piston engine and method for producing a hollow piston |
| DE102010032236A1 (en) * | 2010-07-26 | 2012-01-26 | Robert Bosch Gmbh | Process for producing a hollow piston and corresponding hollow piston |
-
2016
- 2016-05-31 CN CN201610380130.1A patent/CN105889059B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0808988A1 (en) * | 1996-05-20 | 1997-11-26 | Brueninghaus Hydromatik Gmbh | Hollow piston with a radially welded cover |
| CN102814629A (en) * | 2011-06-10 | 2012-12-12 | 罗伯特·博世有限公司 | Method for manufacturing piston and piston used for piston machine |
| CN103711689A (en) * | 2014-01-09 | 2014-04-09 | 北京理工大学 | High pressure hydraulic pump plunger of hollow structure |
| CN204212972U (en) * | 2014-09-28 | 2015-03-18 | 宁波广天赛克思液压有限公司 | A kind of closed noise reduction hollow plunger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105889059A (en) | 2016-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105889059B (en) | A kind of hollow plunger processing technology | |
| US4704055A (en) | Drill with cooling channel | |
| CN102294569A (en) | Processing technic of small-diameter thin-wall deep-hole high-accuracy part and special grinding tool applied to same | |
| CN103894789A (en) | Machine tool spindle machining method | |
| CN103506822B (en) | A kind of processing method of advanced High Temperature Resistant Polyimide Composites retainer | |
| CN111015107A (en) | Hydraulic cylinder body and cylinder sleeve boring and rolling combined machining method | |
| CN104005020B (en) | A kind of manufacture method of helicoid hydraulic motor transverse bearing | |
| CN105665806A (en) | PCD (polycrystalline diamond) milling cutter and machining method therefor | |
| JP2014094429A (en) | Processing method of steel member, mill board, and cvt pulley shaft | |
| CN206952229U (en) | A kind of cutter for being used to process big L/D ratio piston rod deep hole | |
| KR20040062281A (en) | Making method of crank shaft and motor shaft | |
| CN210254940U (en) | Inner hole rolling device | |
| US11571754B2 (en) | Single-lip deep-hole drill with a chamfered rake face | |
| CN218284364U (en) | Low-damping rolling cutter for ultrahigh-speed deep metal nanocrystallization | |
| CN104096853B (en) | Utilize the processing method of general NC machine tooling sloping shaft axial workpiece | |
| CN107378412A (en) | The manufacture method and piston of compressor piston, compressor | |
| CN104084614A (en) | Die deep-hole machining method utilizing double-edge boring tool | |
| CN2900085Y (en) | Self grinding center | |
| CN207288978U (en) | Lineback calendering drill bit | |
| CN203711944U (en) | Durable drill | |
| CN206415682U (en) | A kind of dedicated tool for the complicated hole system processing of large scale housing high accuracy | |
| CN202087866U (en) | Static pinhole boring mill | |
| CN216966368U (en) | Deep hole twist type drill bit | |
| CN213614344U (en) | Self-centering anti-deflection damping hole machining tool | |
| KR102686399B1 (en) | Burnishing drill having joining structure of guide pad tip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |