CN105889059A - Hollow plunger and machining technology thereof - Google Patents
Hollow plunger and machining technology thereof Download PDFInfo
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- CN105889059A CN105889059A CN201610380130.1A CN201610380130A CN105889059A CN 105889059 A CN105889059 A CN 105889059A CN 201610380130 A CN201610380130 A CN 201610380130A CN 105889059 A CN105889059 A CN 105889059A
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- plunger
- column
- perforation
- cylindrical cavity
- end cap
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/10—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass pistons
Abstract
The invention discloses a hollow plunger and a machining technology thereof. The problems that a solid plunger is high in mass, and a fully hollow plunger is large in invalid volume are solved. According to the technical scheme, the hollow plunger is characterized in that the hollow plunger comprises a plunger core and a plunger sleeve; one end of the plunger sleeve extends to form a ball head; a columnar cavity is formed in the end, far away from the ball head, of the plunger sleeve in the length direction of the plunger sleeve; the plunger core comprises an end cover and a stand column which is fixed to the circle center of the end cover and extends outwards in the manner of being perpendicular to the end face of the end cover; the outer diameter of the stand column is smaller than the inner diameter of the columnar cavity; the stand column is arranged in the columnar cavity in a penetrating manner, and the end of the stand column is connected with the circle center of the bottom face of the columnar cavity through a welding point; and the edge of a covering face of the end cover is connected with the open edge of the columnar cavity through a weld joint. According to the hollow plunger and the machining technology thereof, a closed chamber is formed between the columnar cavity and the end cover through fixing of the end cover and the plunger sleeve, and therefore the mass of the plunger is reduced, and the situation that a cylinder body overturns due to large torque caused by the centrifugal force of the plunger is avoided, so that the service life of a plunger pump is prolonged.
Description
Technical field
The present invention relates to hydraulic system and perform components and parts technical field, particularly to a kind of hollow plunger and processing technique thereof.
Background technology
Plunger, as part most crucial in plunger displacement pump, directly affects the quality of plunger displacement pump.Plunger can be divided into solid plunger and hollow plunger according to structure.
If plunger is made solid parts, its weight will be greatly increased, plunger centrifugal force the larger torque produced easily causes cylinder body to topple, thus affects the service life of plunger displacement pump.
If plunger is helped hollow-core construction, although structure is relatively simple, but cavity therein increases the invalid dead volume in cylinder barrel, making the adverse effect aggravation that volumetric efficiency is produced by the compressibility of working media, the most existing plunger there is also certain room for improvement.
Summary of the invention
It is an object of the invention to provide a kind of hollow plunger, it is possible to reduce quality and the inertia force of plunger, and the Iinvalid volume of plunger can be reduced.
The above-mentioned technical purpose of the present invention has the technical scheme that
A kind of hollow plunger, the plunger bushing of bulb it is extended with including plunger core and one end, described plunger bushing offers cylindrical cavity away from one end of bulb along the length direction of plunger bushing, described plunger core includes end cap and is fixed on the center of circle of end cap and is perpendicular to the outward extending column of end face of end cap, the external diameter of described column is less than the internal diameter of cylindrical cavity, described column is arranged in the end of cylindrical cavity and column and is connected with the center of circle, bottom surface of cylindrical cavity by solder joint, and the edge, the face that covers of described end cap is connected with the opening edge edge of cylindrical cavity by weld seam.
Using such scheme, end cap and the fixing of plunger bushing make to define between cylindrical cavity and end cap airtight chamber, thus reduce the quality of plunger, it is to avoid the larger torque that plunger centrifugal force produces causes cylinder body to topple, to increase the service life of plunger displacement pump；The column being arranged in cylindrical cavity can reduce the invalid dead volume in plunger bushing, add volumetric efficiency, to reduce the compressibility adverse effect to volumetric efficiency of working media, column can also play the effect of support, plunger end cap in running will not be sunk, add the structural strength of plunger.
As preferably, the edge, the face that covers of described end cap is axially extended with flange towards the direction of bulb, the external diameter of described flange is consistent with the external diameter of plunger bushing, and its internal diameter is consistent with the internal diameter of plunger bushing, and the edge of described flange is connected with the opening edge edge of cylindrical cavity by weld seam.
Using such scheme, when flange makes end cap weld on plunger bushing, end cap will not directly contact with plunger bushing, leaves welding space so that end cap will not be lost because of weld seam.
As preferably, described column is arranged with piston spacer away from one end of end cap, and described uprights vertical maintains gap in the plane of piston spacer, described piston spacer with the bottom surface of cylindrical cavity, and the cylindrical of described piston spacer is close to the inner circle of cylindrical cavity.
Use such scheme, if there is no piston spacer, when end cap welds on plunger bushing, column can the run-off the straight because of vibration, make column position produce skew, cause the overall center of gravity generation deviation of plunger；The setting of piston spacer serves the effect of vertical columns, when end cap is in welding, column is located in cylindrical cavity, at this moment the edge of piston spacer is supported in the sidewall of cylindrical cavity, column end when welding can be fixed, it is not susceptible to and position offsets, thus add welding precision.
As preferably, described column is arranged in the home position of piston spacer.
Use such scheme so that the distance between the edge of piston spacer with column center can keep consistent, adds the balance of piston spacer, promote its fixed effect further.
As preferably, described column is extended with the shaft shoulder away from one end of end cap, and the external diameter of the described shaft shoulder is less than the external diameter of column, and the center of described piston spacer offers the 3rd perforation, the described shaft shoulder is arranged in the 3rd perforation, and the described shaft shoulder is fixed with piston spacer by the 3rd perforation.
Use such scheme, make between the shaft shoulder and column, to define a ring ladder, after piston spacer is set to the shaft shoulder by the 3rd perforation set, the ring ladder formed between the shaft shoulder and column serves position-limiting action, piston spacer is enable to be positioned in the optimum position of column, it is to avoid to affect the locating effect of piston spacer.
As preferably, the central axial of described column offers the first perforation, described bulb central axial offers the second perforation, and described first perforation extends to end cap near one end of end cap, and described first perforation extends to the second perforation boring a hole with second away from one end of end cap by the shaft shoulder and connects.
Use such scheme, first perforation can store fluid in the second perforation so that plunger is during motion, and fluid can flow at the second perforation back and forth from the first perforation being interconnected, thus play the effect of lubrication plunger, to increase the service life of plunger displacement pump.
As preferably, a kind of processing technique processing hollow plunger, the processing technique of plunger bushing comprises the steps:
The first step: choose raw material, raw material selection material is 38CrMoALA, specification is the bar of 30；
Second step: blanking, blank size leaves length surplus 1.5 millimeters compared to standard size；
3rd step: the raw material in second step carries out heat treatment process, modifier treatment, quenching and tempering hardness is HRC24～26 degree；
4th step: raw material is carried out roughing process, by measuring truck wheeled litter out circle, to obtain the cylinder of plunger bushing；
5th step: Drilling operation, gets out the cylindrical cavity of plunger bushing by vertical drill；
6th step: flat processing, utilizes engine lathe the bottom surface degree of depth of cylindrical cavity to be processed, it is ensured that size 60+0.1/0 is consistent；
The processing technique of plunger core comprises the steps:
The first step: choose raw material, raw material selection material is 38CrMoALA, specification is the bar of 30；
Second step: blanking, blank size leaves length surplus 1.5 millimeters compared to standard size；
3rd step: the raw material in second step carries out heat treatment process, modifier treatment, quenching and tempering hardness is HRC24～26 degree；
4th step: the bar in the 3rd step is carried out turning by numerically controlled lathe, with the column integrally connected and end cap, and extends the flange on end cap；
5th step: go out the shaft shoulder from the end car of column by instrument lathe；
The plunger bushing of completion of processing assembled with plunger core and welds, specifically comprising the following steps that
The first step: piston spacer is set to the shaft shoulder by the 3rd perforation set, until inconsistent with the end of column；
Second step: be held in the rolling clamp of friction-welding machine by plunger bushing, plunger core is held in the movable clamp of friction-welding machine, and plunger core is positioned at same straight line with the central shaft of plunger bushing, and the end of column is relative with the opening of cylindrical cavity；
3rd step: soldering, carries out stable friction welding rear braking braking in 4 seconds with rotating speed 1400rpm, friction pressure 50MPa；Keeping the upsetting force of 50MPa while skidding, and keep upsetting force 4 seconds, so that the bottom surface of the end of column and cylindrical cavity fixes, the end face of flange fixes with the end face of plunger bushing simultaneously；
4th step: destressing processes, so that hardness reaches HRC26～28 degree；
5th step: bulb roughing, by instrument lathe turning, to obtain the bulb of plunger bushing；
6th step: bore aperture, is holed with bulb in the end of plunger bushing respectively by vertical drill, to obtain the first perforation and the second perforation；
7th step: by the numerically controlled lathe profile polish to bulb；
8th step: centreless grinding corase grind cylindrical；
9th step: nitrogen treatment, the hard nitriding furnace of well formula gas, surfaces nitrided hardness is HV900～1100 degree, and nitridation deep layer is 0.3～0.5 millimeter；
Tenth step: bulb is carried out polish process by grinding；
11st step: centreless grinding processing excircles in high precision；
12nd step: super grinding processing excircles is to figure paper size in high precision.
Using such scheme, this technological operation being used for processing hollow plunger is simple, shortens technological process, and processing cost is low, and machining accuracy is high simultaneously.
In sum, the method have the advantages that
1, end cap and the fixing of plunger bushing make to define between cylindrical cavity and end cap airtight chamber, thus reduce the quality of plunger, it is to avoid the larger torque that plunger centrifugal force produces causes cylinder body to topple, to increase the service life of plunger displacement pump；
2, the column being arranged in cylindrical cavity can reduce the invalid dead volume in plunger bushing, add volumetric efficiency, to reduce the compressibility adverse effect to volumetric efficiency of working media, column can also play the effect of support, plunger end cap in running will not be sunk, add the structural strength of plunger；
3, by take this structural measure to alleviate plunger quality and reduce plunger inertia force provide possibility, substantially improve the dynamic characteristic of plunger displacement pump；
4, the processing technique of this hollow plunger is by using friction soldering processes plunger core to be combined with plunger bushing, and Simplified flowsheet reduces work flow, on the premise of ensureing properties of product and quality, reduces production cost, and machining accuracy is high simultaneously.
Accompanying drawing explanation
Fig. 1 is plunger bushing and the explosive view of plunger core in the present invention；
Fig. 2 is the enlarged diagram in A portion shown in Fig. 1；
Fig. 3 is plunger bushing and the assembling schematic diagram of plunger core in the present invention.
In figure: 1, plunger core；2, plunger bushing；3, bulb；4, cylindrical cavity；5, end cap；6, column；7, flange；8, piston spacer；9, the shaft shoulder；10, the 3rd perforation；11, the first perforation；12, the second perforation.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; the present embodiment can be made after reading this specification by those skilled in the art as required does not has the amendment of creative contribution, but as long as all being protected by Patent Law in scope of the presently claimed invention.
A kind of hollow plunger disclosed in the present embodiment, as shown in Figure 1, the plunger bushing 2 of bulb 3 it is extended with including plunger core 1 and one end, plunger bushing 2 offers cylindrical cavity 4 away from one end of bulb 3 along the length direction of plunger bushing 2, plunger core 1 includes end cap 5 and is fixed on the center of circle of end cap 5 and is perpendicular to the outward extending column of end face 6 of end cap 5, the external diameter of column 6 is less than the internal diameter of cylindrical cavity 4, column 6 is arranged in the end of cylindrical cavity 4 and column 6 and is connected with the center of circle, bottom surface of cylindrical cavity 4 by solder joint, the edge, the face that covers of end cap 5 is connected with the opening edge edge of cylindrical cavity 4 by weld seam.
As it is shown in figure 1, the edge, the face that covers of end cap 5 is axially extended with flange 7 towards the direction of bulb 3, the external diameter of flange 7 is consistent with the external diameter of plunger bushing 2, and its internal diameter is consistent with the internal diameter of plunger bushing 2, and the edge of flange 7 is connected with the opening edge edge of cylindrical cavity 4 by weld seam.
As in figure 2 it is shown, column 6 is arranged with piston spacer 8 away from one end of end cap 5, column 6 is perpendicular to the plane of piston spacer 8, and piston spacer 8 maintains gap with the bottom surface of cylindrical cavity 4, and the cylindrical of piston spacer 8 is close to the inner circle of cylindrical cavity 4.Wherein the cross sectional shape of piston spacer 8 keeps consistent with the cross sectional shape of cylindrical cavity 4, thus increases the fixed effect of piston spacer 8.Column 6 is arranged in the home position of piston spacer 8.
As in figure 2 it is shown, column 6 is extended with the shaft shoulder 9 away from one end of end cap 5, the external diameter of the shaft shoulder 9 is less than the external diameter of column 6, and the center of piston spacer 8 offers the 3rd perforation 10, and the shaft shoulder 9 is arranged in the 3rd perforation 10, and the shaft shoulder 9 is fixed with piston spacer 8 by the 3rd perforation 10.
As shown in Figure 1, the central axial of column 6 offers the first perforation 11, bulb 3 central axial offers the second perforation 12, and the first perforation 11 extends to end cap 5 near one end of end cap 5, and the first perforation 11 extends to the second perforation 12 away from one end of end cap 5 by the shaft shoulder 9 and connects with the second perforation 12.
Being experimentally confirmed, under the operating pressure of 315bar, the hollow plunger noise experiment data of the present invention are≤83dB, and traditional full void column plug is 88dB, can obtain according to experimental result, noise produced by the hollow plunger of the present invention is low 5dB.
The fluid minimum cylinder volume of hollow plunger is 95%, and full void column plug is 92%, experimental data can obtain, and the volumetric efficiency of hollow structure to improve 3% than full hollow structure；And the various performance curves of hollow plunger are also the most steady compared with full void column plug, fluctuate less.
Test result indicate that the plunger using hollow structure, compare solid plunger weight saving 15%, and there is while Iinvalid volume minimizes enough rigidity, noise reduces 5dB and reaches 83dB, volumetric efficiency reaches 95%, and experimental index is superior to hydraulic axial plunger pump industry standard (JB/T 7043-2006).
The processing technique of plunger bushing 2 comprises the steps:
The first step: choose raw material, raw material selection material is 38CrMoALA, specification is the bar of 30；38CrMoALA is senior nitrated steel, accurate in size nitridation part after being mainly used in having high-wearing feature, high-fatigue strength, high mechanical properties and heat treatment, or the various nitridation part that load is little and wearability is high that is hit.
Second step: blanking, utilizes cutting machine to cut original bar, it is simple to following process, and blank size leaves length surplus 1.5 millimeters compared to standard size.
3rd step: the raw material in second step carries out heat treatment process, modifier treatment, quenching and tempering hardness is HRC24～26 degree；Modifier treatment is the dual heat treatment that quenching increases temperature tempering, its objective is to make workpiece have good comprehensive mechanical performance.Technology for Heating Processing includes annealing, normalizing, quenches, is tempered and the method such as Surface heat-treatent.Wherein it is tempered and includes modifier treatment and Ageing Treatment.Being reheated between uniform temperature (350 DEG C～650 DEG C) carry out by the most quenched bar according to desired mechanical performance, carbon is that the cementite form to be carefully all distributed separates out.Along with the increase of temperature, the granule of carbide just increases, and yield point and hot strength just decline, and reduces hardness and fragility, elongation percentage and shrinkage factor just raise.Its objective is to eliminate the internal stress that quenching produces, to obtain intended mechanical property.
4th step: raw material is carried out roughing process, by measuring truck wheeled litter out circle, to obtain the cylinder of plunger bushing 2；Instrument lathe belongs to simple horizontal lathe, owing to using hand propelled feed, collet quick-clamping, thimble-type stopping means, the board-like operation of fast hand, motor directly drives spindle operation, location controls turning, workpiece and external form to single fixing kind carry out Continuous maching, improve work efficiency more than 10 times than engine lathe, are particularly well-suited to high-volume, the processing of finding.Other lathes can be replaced, to save energy resource consumption.
5th step: Drilling operation, gets out the cylindrical cavity 4 of plunger bushing 2 by vertical drill；Drilling depth is at about 60mm.
6th step: flat processing, utilizes engine lathe the bottom surface degree of depth of cylindrical cavity 4 to be processed, it is ensured that size 60+0.1/0 is consistent；Milling cutter is utilized to mill out the flat of cylindrical cavity 4.
The processing technique of plunger core 1 comprises the steps:
The first step: choose raw material, raw material selection material is 38CrMoALA, specification is the bar of 30；
Second step: blanking, blank size leaves length surplus 1.5 millimeters compared to standard size；
3rd step: the raw material in second step carries out heat treatment process, modifier treatment, quenching and tempering hardness is HRC24～26 degree；
4th step: the bar in the 3rd step is carried out turning by numerically controlled lathe, with the column 6 and the end cap 5 that are integrally connected, and extends the flange 7 on end cap 5；
5th step: go out the shaft shoulder 9 from the end car of column 6 by instrument lathe.
The plunger bushing 2 of completion of processing assembled with plunger core 1 and welds, specifically comprising the following steps that
The first step: piston spacer 8 is set to the shaft shoulder 9 by the 3rd perforation 10 set, until inconsistent with the end of column 6, wherein piston spacer 8 and the shaft shoulder 9 interference fit.
Second step: be held in the rolling clamp of friction-welding machine by plunger bushing 2, plunger core 1 is held in the movable clamp of friction-welding machine, and plunger core 1 is positioned at same straight line with the central shaft of plunger bushing 2, and the end of column 6 is relative with the opening of cylindrical cavity 4；Friction welding (FW) is the solid welding method realizing welding.Under pressure, i.e. under the effect of constant or incremental pressure and moment of torsion, the relative motion between welding contact end face is utilized to produce frictional heat and plastic deformation heat at rubbing surface and near zone thereof, make its near zone temperature rise towards but the temperature range of generally below fusing point, make the resistance of deformation of material reduce, plasticity improves, the oxide-film at interface crushes；Under the effect of upsetting force, produce plastic deformation and flowing with material, realize solid State Welding by molecule diffusion and the recrystallization at interface.Relatively conventional melting welding, friction welding (FW) has the advantage that quality of weld joint is high, can reach weld strength and matrix material equal strength, and welding efficiency height, steady quality, concordance are good, can realize welding dissimilar materials etc..
3rd step: soldering, when welding, open friction-welding machine, plunger bushing 2 carries out high-speed rotation under the driving of rolling clamp, piston spacer 8 is pushed in cylindrical cavity 4 under the driving of movable clamp by plunger core 1 simultaneously, and the edge making piston spacer 8 is inconsistent with the inwall of cylindrical cavity 4, thus plays the effect of vertical columns 6, prevent plunger core 1 column 6 run-off the straight or skew during welding, considerably increase machining accuracy；When the end of column 6 is moved and is contacted mutually to the bottom surface with cylindrical cavity 4, owing to carrying out relative motion at a high speed between the two, make between two contact surfaces owing to friction produces substantial amounts of heat, allow the material melts of near zone, under the effect of upsetting force, make the molecule at column 6 and the underrun interface of cylindrical cavity 4 spread and recrystallization and weld together；Meanwhile, the flange 7 of end cap 5 also produces heat with the end face of plunger bushing 2 because of Relative friction so that together with the flange 7 of end cap 5 is also welded to the end face of plunger bushing 2.
Friction-welding machine operationally, carries out stable friction welding rear braking braking in 4 seconds with rotating speed 1400rpm, friction pressure 50MPa；Keeping the upsetting force of 50MPa while skidding, and keep upsetting force 4 seconds, so that the bottom surface of the end of column 6 and cylindrical cavity 4 fixes, the end face of flange 7 fixes with the end face of plunger bushing 2 simultaneously.
4th step: destressing processes, so that hardness reaches HRC26～28 degree；
5th step: bulb 3 roughing, by instrument lathe turning, to obtain the bulb 3 of plunger bushing 2；
6th step: bore aperture, holed with bulb 3 in the end of plunger bushing 2 respectively by vertical drill, to obtain the first perforation 11 and the second perforation 12；Should be respectively from the end punching at the end face center of end cap 5 with bulb 3, wherein the first perforation 11 is connected with the second perforation 12 by the center of column 6, and the aperture of the first perforation 11 is more than the aperture of the second perforation 12.
7th step: by the numerically controlled lathe profile polish to bulb 3 so that the size of bulb 3 is closer to figure paper size.
8th step: centreless grinding corase grind cylindrical, prepares for nitridation.
9th step: nitrogen treatment, the hard nitriding furnace of well formula gas, surfaces nitrided hardness is HV900～1100 degree, and nitridation deep layer is 0.3～0.5 millimeter；Nitrogen treatment refers to a kind of chemical heat treatment process at a certain temperature, making in certain medium nitrogen-atoms penetrate into workpiece surface.The goods that via nitride processes have wearability, fatigue durability, corrosion resistance and the resistant to elevated temperatures characteristic of excellence.
Tenth step: bulb 3 is carried out polish process by grinding so that the surface of bulb 3 is more smooth and smoothes out.
11st step: centreless grinding processing excircles in high precision, to improve the precision of bulb 3.
12nd step: super grinding processing excircles is to figure paper size in high precision.
Claims (7)
1. a hollow plunger, it is characterized in that: include that plunger core (1) and one end are extended with the plunger bushing (2) of bulb (3), described plunger bushing (2) offers cylindrical cavity (4) away from one end of bulb (3) along the length direction of plunger bushing (2), described plunger core (1) includes end cap (5) and the center of circle being fixed on end cap (5) and is perpendicular to the outward extending column of the end face (6) of end cap (5), the external diameter of described column (6) is less than the internal diameter of cylindrical cavity (4), described column (6) is arranged in the end of cylindrical cavity (4) and column (6) and is connected with the center of circle, bottom surface of cylindrical cavity (4) by solder joint, the edge, the face that covers of described end cap (5) is connected with the opening edge edge of cylindrical cavity (4) by weld seam.
A kind of hollow plunger the most according to claim 1, it is characterized in that: the edge, the face that covers of described end cap (5) is axially extended with flange (7) towards the direction of bulb (3), the external diameter of described flange (7) is consistent with the external diameter of plunger bushing (2), its internal diameter is consistent with the internal diameter of plunger bushing (2), and the edge of described flange (7) is connected with the opening edge edge of cylindrical cavity (4) by weld seam.
A kind of hollow plunger the most according to claim 2, it is characterized in that: described column (6) is arranged with piston spacer (8) away from one end of end cap (5), described column (6) is perpendicular to the plane of piston spacer (8), described piston spacer (8) maintains gap with the bottom surface of cylindrical cavity (4), and the cylindrical of described piston spacer (8) is close to the inner circle of cylindrical cavity (4).
A kind of hollow plunger the most according to claim 3, is characterized in that: described column (6) is arranged in the home position of piston spacer (8).
A kind of hollow plunger the most according to claim 4, it is characterized in that: described column (6) is extended with the shaft shoulder (9) away from one end of end cap (5), the external diameter of the described shaft shoulder (9) is less than the external diameter of column (6), the center of described piston spacer (8) offers the 3rd perforation (10), the described shaft shoulder (9) is arranged in the 3rd perforation (10), and the described shaft shoulder (9) is fixed with piston spacer (8) by the 3rd perforation (10).
A kind of hollow plunger the most according to claim 5, it is characterized in that: the central axial of described column (6) offers the first perforation (11), the central axial of described bulb (3) offers the second perforation (12), described first perforation (11) extends to end cap (5) near one end of end cap (5), and described first perforation (11) extends to the second perforation (12) away from one end of end cap (5) by the shaft shoulder (9) and connects with the second perforation (12).
7. process a processing technique for hollow plunger as claimed in claim 6, it is characterized in that:
The processing technique of plunger bushing (2) comprises the steps:
The first step: choose raw material, raw material selection material is 38CrMoALA, specification is the bar of 30；
Second step: blanking, blank size leaves length surplus 1.5 millimeters compared to standard size；
3rd step: the raw material in second step carries out heat treatment process, modifier treatment, quenching and tempering hardness is HRC24～26 degree；
4th step: raw material is carried out roughing process, by measuring truck wheeled litter out circle, to obtain the cylinder of plunger bushing (2)；
5th step: Drilling operation, gets out the cylindrical cavity (4) of plunger bushing (2) by vertical drill；
6th step: flat processing, utilizes engine lathe the bottom surface degree of depth of cylindrical cavity (4) to be processed, it is ensured that size 60+0.1/0 is consistent；
The processing technique of plunger core (1) comprises the steps:
The first step: choose raw material, raw material selection material is 38CrMoALA, specification is the bar of 30；
Second step: blanking, blank size leaves length surplus 1.5 millimeters compared to standard size；
3rd step: the raw material in second step carries out heat treatment process, modifier treatment, quenching and tempering hardness is HRC24～26 degree；
4th step: the bar in the 3rd step is carried out turning by numerically controlled lathe, with the column (6) and the end cap (5) that are integrally connected, and extends the flange (7) on end cap (5)；
5th step: go out the shaft shoulder (9) from the end car of column (6) by instrument lathe；
The plunger bushing (2) of completion of processing is assembled with plunger core (1) and welds, specifically comprises the following steps that
The first step: piston spacer (8) is set to the shaft shoulder (9) by the 3rd perforation (10) set, until inconsistent with the end of column (6)；
Second step: plunger bushing (2) is held in the rolling clamp of friction-welding machine, plunger core (1) is held in the movable clamp of friction-welding machine, plunger core (1) is positioned at same straight line with the central shaft of plunger bushing (2), and the end of column (6) is relative with the opening of cylindrical cavity (4)；
3rd step: soldering, carries out stable friction welding rear braking braking in 4 seconds with rotating speed 1400rpm, friction pressure 50MPa；The upsetting force of 50MPa is kept while skidding, and keep upsetting force 4 seconds, so that the bottom surface of the end of column (6) and cylindrical cavity (4) fixes, the end face of flange (7) fixes with the end face of plunger bushing (2) simultaneously；
4th step: destressing processes, so that hardness reaches HRC26～28 degree；
5th step: bulb (3) roughing, by instrument lathe turning, to obtain the bulb (3) of plunger bushing (2)；
6th step: bore aperture, is holed with bulb (3) in the end of plunger bushing (2) respectively by vertical drill, to obtain the first perforation (11) and the second perforation (12)；
7th step: by the numerically controlled lathe profile polish to bulb (3)；
8th step: centreless grinding corase grind cylindrical；
9th step: nitrogen treatment, the hard nitriding furnace of well formula gas, surfaces nitrided hardness is HV900～1100 degree, and nitridation deep layer is 0.3～0.5 millimeter；
Tenth step: bulb (3) is carried out polish process by grinding；
11st step: centreless grinding processing excircles in high precision；
12nd step: super grinding processing excircles is to figure paper size in high precision.
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| CN201610380130.1A CN105889059B (en) | 2016-05-31 | 2016-05-31 | A kind of hollow plunger processing technology |
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| CN201610380130.1A CN105889059B (en) | 2016-05-31 | 2016-05-31 | A kind of hollow plunger processing technology |
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| CN105889059B CN105889059B (en) | 2018-07-03 |
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Cited By (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 |
| CN113182842A (en) * | 2021-03-30 | 2021-07-30 | 唐微 | Automatic assembly production line of spring plunger for automobile mould |
| CN113560811A (en) * | 2020-04-28 | 2021-10-29 | 仪征市峰业机械有限公司 | Optimized plunger sleeve processing technology |
| 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 |
| CN114434104A (en) * | 2022-01-27 | 2022-05-06 | 宝玛医疗科技(无锡)有限公司 | Processing method of nail box base for anastomat |
| CN114687978A (en) * | 2022-03-25 | 2022-07-01 | 宁波派锐森液压有限公司 | Plunger piston shoe and assembly process thereof |
| CN114893271A (en) * | 2022-06-07 | 2022-08-12 | 湖州通源机械零部件有限公司 | Plug-in tappet welding structure and process thereof |
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Cited By (11)
| 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 |
| CN113182842A (en) * | 2021-03-30 | 2021-07-30 | 唐微 | Automatic assembly production line of spring plunger for automobile mould |
| 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 |
| CN114434104A (en) * | 2022-01-27 | 2022-05-06 | 宝玛医疗科技(无锡)有限公司 | Processing method of nail box base for anastomat |
| CN114687978A (en) * | 2022-03-25 | 2022-07-01 | 宁波派锐森液压有限公司 | Plunger piston shoe and assembly process thereof |
| 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 |
| CN114893271A (en) * | 2022-06-07 | 2022-08-12 | 湖州通源机械零部件有限公司 | Plug-in tappet welding structure and 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 |
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