CN1535358A - Piston for compressor and method for mfg. the same - Google Patents
Piston for compressor and method for mfg. the same Download PDFInfo
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- CN1535358A CN1535358A CNA028148886A CN02814888A CN1535358A CN 1535358 A CN1535358 A CN 1535358A CN A028148886 A CNA028148886 A CN A028148886A CN 02814888 A CN02814888 A CN 02814888A CN 1535358 A CN1535358 A CN 1535358A
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Abstract
A material for manufacturing the piston of a compressor is produced by forging. The inner circumferential surface and the bottom face at a tubular forming part are formed by side punching. Center holes are made, respective, in the bottom face of the piston material and a protruding part. The mandrel of a spinning machine engages the center hole and the center engages the center hole. Under a state where the piston material is supported from the opposite sides while being centered, three spinning rollers approach in synchronism to constrict the opening side end part of a hollow tubular part. After a thick constricted part and a nonconstricted part are formed in the hollow tubular part, the outer circumferential surface is cut to equalize the outside diameters at the nonconstricted part and the constricted part thus forming a thick part at the opening side end part of a hollow tubular part. Subsequently, an annular piston ring groove is made in the outer circumferential surface at the thick part.
Description
Technical field
The present invention relates to used piston and manufacture method thereof in the compressors such as tilted-plate compressor, particularly relate to piston and manufacture method thereof that the head that is embedded in the cylinder hole is a hollow.
Background technique
In general piston for compressor, can be embedded in the cylinder hole of cylinder body slidably, and has integratedly with cylinder body and form the head of pressing chamber and the engagement portion that engages with drive unit jointly.And head is often done into hollow for the requirement of satisfying weight reduction.In addition, the engagement portion for example, in tilted-plate compressor, has in parallel to each other a pair of arm that extends, and links the linking department between these arm cardinal extremities, and a pair of arm is sticked on two slip surfaces of peripheral part of swash plate via piston shoes respectively.
Though aforementioned hollow head often has hollow cylindrical portion, be necessary to make the axial part of this hollow cylindrical portion sometimes than other part wall thickness.For example, because on the outer circumferential face of hollow head, form circular grooves such as piston ring groove, oil groove, perhaps, be necessary to form heavy wall in order to improve purposes such as intensity.But piston is because the requirement of weight reduction is very strong as previously mentioned, so do not wish to thicken the overall thickness of hollow cylindrical portion.In addition, be that the cylinder hole of barrel surface is chimeric from being necessary to make hollow head and inner peripheral surface, it is necessary making the outer circumferential face of piston roughly form barrel surface.Therefore, when an axial part that is necessary to make hollow cylindrical portion was heavy wall, wall thickness was had to side-prominent to inner peripheral surface one.
On the other hand, piston for compressor is often made by forging, casting, and piston by drift, forms by core in the occasion of casting in the occasion of forging with the inner peripheral surface of the hollow cylindrical portion of blank.Thereby after the shaping, it is necessary that drift or core are extracted from hollow cylindrical portion, the inner peripheral surface of hollow cylindrical portion, more for a short time being absolutely necessary of forward end diameter of past more drift or core.If an axial part is done into heavy section, and inwardly on the axial intermediate portion of inner peripheral surface or opening side end, form side-prominent circular teat of week, then drift or core can not be transferred in hollow cylindrical portion.Therefore, the occasion be necessary to form side-prominent circular teat of inside week on the axial intermediate portion of inner peripheral surface or opening side end under prior art, is necessary the inner peripheral surface of cutting hollow cylindrical portion.
But the inner peripheral surface of cutting hollow cylindrical portion is not desirable thing.That is to say that the outer circumferential face of hollow head because be necessary to be embedded in accurately in the cylinder hole, is absolutely necessary so impose machinings such as cutting.Therefore, if also cutting inner peripheral surface then is necessary machining inner peripheral surface and outer circumferential face both sides, manufacture cost increases.In addition, the machining of inner peripheral surface is generally than outer circumferential face difficulty.
The present invention is a background with above situation, and problem is, in the piston for compressor that has hollow cylindrical portion, makes the manufacturing that has on the axial part of hollow cylindrical portion than the piston of the part of other part wall thickness become easy.
Summary of the invention
The manufacture method of the piston for compressor in an embodiment of the invention, comprise: the piston have hollow cylindrical portion of being shaped obtains the forming process of formed article with blank, make the undergauge operation of a part of undergauge of the hollow cylindrical portion of this formed article by plastic working, and after this undergauge operation, by the outer circumferential face of cutting piston, make the external diameter cutting operation identical of diameter reducing part with non-diameter reducing part with blank.
Like this, have the piston blank of hollow cylindrical portion if be shaped, make axial a part of undergauge of the hollow cylindrical portion of this formed article by plastic working, then, just can on the inner peripheral surface of hollow cylindrical portion, form the part of giving prominence to than the more inside all sides of other parts without cutting circularly.Then, if by the cutting outer circumferential face, make the external diameter of diameter reducing part identical with non-diameter reducing part, the cutting of then not carrying out inner peripheral surface also can form heavy section on the axial part of hollow cylindrical portion.
As previously mentioned, identical for the external diameter of diameter reducing part is formed with non-diameter reducing part, though the machining allowance of non-diameter reducing part often be necessary than always many,, often the cutting needed time of outer circumferential face changes not quite.In general the cutting of outer circumferential face is undertaken by roughing and fine finishing, because rough machined machining allowance is often smaller, so bigger than always even the machining allowance of outer circumferential face becomes, also seldom therefore producing increases necessity of carrying out rough machined number of times.In addition, even, can shorten the required total time of processing just in case rough machined implementation number of times increases, and the cutting of outer circumferential face is compared with the cutting of inner peripheral surface still easily.
In aforementioned undergauge operation, preferably make a part of undergauge of aforementioned hollow cylindrical portion by spinning.If implement the undergauge operation, then can easily make the axial a part of undergauge of hollow cylindrical portion by spinning.Spinning, though also can carry out with the outer circumferential face of blank by the piston of the machining tool of non-rotating type (press spoon) being pushed down in the rotation, the method for the outer circumferential face of rotating members such as roller being pushed down the outer circumferential face of hollow cylindrical portion is easier to.And often the dimensional accuracy of diameter reducing part also improves.Preferably use a plurality of spinning rollers, on a plurality of positions that separate on the circumferencial direction of the outer circumferential face of hollow cylindrical portion, push down simultaneously.The spinning roller more than three that preferably makes equal angles compartment of terrain configuration mutually synchronously moves to the centerline direction that approaches hollow cylindrical portion (being called central direction).But no matter the equal angles compartment of terrain disposes, or the phase mutually synchronization, is not absolutely necessary.For example, each spinning roller is moved individually to the center, lean on force application mechanisms such as spring component, cylinder respectively to the central direction application of force.
In aforementioned undergauge operation, also can use the pressure processing of metal pattern to make axial a part of undergauge of aforementioned hollow cylindrical portion by utilization.As the aforementioned metal mould, for example, can use the metal pattern that comprises the reducing die that has the pull and stretch hole, wherein the pull and stretch hole has large diameter hole portion and small diameter bore portion.At this moment, hollow cylindrical portion with blank inserts the large diameter hole portion of this reducing die from the opening side end piston, utilization can be gone into hollow cylindrical portion in the axial direction along the axially movable member that pushes of reducing die to the thruster of small diameter bore portion, make the opening side end diameter reducing whereby.Pushing the drive unit that is had in member depended on pressure machine etc. drives and gets final product.
In aforementioned undergauge operation, also can use to have and comprise and surround piston cutting apart mould and making these die components move the metal pattern of the scalable device that makes the nib hole enlargement that forms in the inboard of cutting apart mould and undergauge along radial direction with a plurality of die components around the hollow cylindrical portion of blank.The number of cutting apart of cutting apart mould though the little occasion of the cut-off in the undergauge operation can be taken as 2, preferably more than 3, is more preferably more than 4.Undergauge can carry out at one stroke, also can be divided into a plurality of stages to carry out.
Also can aforementioned hollow cylindrical portion at least should undergauge interior all sides of part, heart members such as configuration axle are by the undergauge limit of its outer circumferential face regulation diameter reducing part.Though heart member is not indispensable, the words that are to use can form the high diameter reducing part of dimensional accuracy.
Aforementioned piston comprise with blank aforementioned hollow cylindrical portion end sealing, the other end opening end hollow cylindrical portion arranged, in aforementioned undergauge operation, also can make this that opening side end diameter reducing of end hollow cylindrical portion is arranged.
Like this,, form heavy section, then often can improve adhesive strength with the closure member of the opening of sealing hollow cylindrical portion if make the opening side end diameter reducing of end hollow cylindrical portion.For example,, face of weld can be widened, weld strength can be increased in the occasion of carrying out aforementioned combination by welding.
Also can on the outer circumferential face of aforementioned diameter reducing part, form circular groove by cutting.If on heavy section, form circular grooves such as piston ring groove or oil groove, then can not only avoid the intensity of hollow head to reduce and weight increase but also form circular groove.
Also can in aforementioned forming process, make aforementioned piston blank by forging.In addition, also can in aforementioned forming process, make aforementioned piston blank by casting.
The manufacture method of piston for compressor also can be included in the embedding part that makes on the end face that is formed at closure member and be entrenched under the state on the inner peripheral surface of opening side end of aforementioned hollow cylindrical portion, aforementioned closure member is fixed in the operation that forms hollow head in the aforementioned hollow cylindrical portion, whereby.
In addition, the manufacture method of piston for compressor, also can comprise: the piston of the hollow cylindrical portion have wall thickness is almost certain and diameter is different mutually large-diameter portion and minor diameter of being shaped is with the forming process of blank, with by this piston of cutting with the outer circumferential face of blank, make the aforementioned large-diameter portion cutting operation identical with the external diameter of aforementioned minor diameter.
In case except use a part of undergauge of the hollow cylindrical portion of blank by the piston that makes shaping, the piston that obtains having the hollow cylindrical portion that comprises wall thickness is almost certain and diameter is different mutually large-diameter portion and minor diameter is with outside the method for blank, can make other part hole enlargements by an axial part that keeps hollow cylindrical portion, obtain having the piston blank of the hollow cylindrical portion of same shape, in addition, the hollow cylindrical portion that also can be shaped from the beginning and comprise large-diameter portion and minor diameter.
Aforementioned forming process, also can comprise: the piston of the hollow cylindrical portion have the end of being shaped is with the 1st forming process of blank, and the piston that makes formed thereby in the 1st forming process is with at least a portion of the hollow cylindrical portion of blank hole enlargement operation from the hole enlargement of interior all side direction outer circumferential sides.
In aforementioned hole enlargement operation, also can comprise the bulging operation, this operation is being provided with a plurality of metal patterns that can folding and is closing in the constraint mould that forms the inner cavity that large diameter hole portion and small diameter bore portion arranged under the state in the pass, constrain in the hollow cylindrical portion of the piston of formed thereby aforementioned the 1st forming process with blank from the outside, by making fluid pressure action under this state on the inner peripheral surface of hollow cylindrical portion, at least a portion of this hollow cylindrical portion is expanded.
Description of drawings
Fig. 1 is that the master that expression has according to the compressor of the piston of the manufacture method manufacturing of the piston for compressor of an embodiment of the invention looks sectional view.
Fig. 2 is that the master of piston of the compressor of Fig. 1 looks sectional view.
Fig. 3 is used for illustrating that the master of the forming process of aforementioned manufacture method looks sectional view.
To be the piston that is illustrated in formed thereby in the aforementioned forming process look sectional view with the master of blank to Fig. 4.
Fig. 5 (a) and (b) be to be used for illustrating that the undergauge operation of aforementioned manufacture method and the master of cutting operation look sectional view.
Fig. 6 is that the expression closure member is embedded in aforementioned piston and looks sectional view with the master of the state in the blank.
Fig. 7 is the plan view that is illustrated in the major component of employed spinning device in the aforementioned undergauge operation.
Fig. 8 is the side view cutaway drawing of aforementioned spinning device.
Fig. 9 is the side view cutaway drawing of the part of the aforementioned spinning device of expression.
Figure 10 is that the master of the part of the aforementioned spinning device of expression looks sectional view.
Figure 11 is the side view of the aforementioned piston of expression with blank.
Figure 12 is illustrated in the control gear of the aforementioned spinning device of control, is associated with the skeleton diagram of part of the present invention.
Figure 13 is used for illustrating that the master of undergauge operation of manufacture method of the piston for compressor of another embodiment of the invention looks sectional view.
Figure 14 is used for illustrating that the master of undergauge operation of manufacture method of the piston for compressor of another mode of execution of the present invention looks sectional view.
Figure 15 is the sectional view of the 15-15 line of Figure 14.
Figure 16 is used for illustrating that the master as the forming process of the manufacture method of the piston for compressor of another mode of execution of the present invention looks sectional view.
Embodiment
Below, used tilted-plate compressor at length describes based on accompanying drawing with the example that is fabricated to of piston in the vehicle air regulator with an embodiment of the invention.
Fig. 1 illustrates the tilted-plate compressor in the present embodiment.In Fig. 1, on a circumference, form a plurality of cylinders hole 12 of extending vertically around the central axis of cylinder body 10.Single head pison 14 (being designated hereinafter simply as piston 14) can reciprocatingly be configured in each cylinder hole 12.
On an axial end face (be the end face in the left side of Fig. 1, be called front-end face) of cylinder body 10, front case 16 is installed, go up at another end face (be the end face on the right side of Fig. 1, be called ear end face) and rear case 18 is installed via valve plate 20.The housing of tilted-plate compressor is waited and is constituted by front case 16, rear case 18, cylinder body 10.Suction chamber 22, discharge chamber 24 are formed between rear case 18 and the valve plate 20, and respectively via suction port 26, supplying mouth 28, are connected on the not shown refrigerating circuit.On valve plate 20, be provided with inlet hole 32, suction valve 34, tap hole 36, expulsion valve 38.
In aforementioned housing, running shaft 50 can be provided with rotatably around the central axis of cylinder body 10.Running shaft 50 can be supported on front case 16, the cylinder body 10 via bearing respectively rotatably at its two end part.On the central part of cylinder body 10, form bearing hole 56, in this bearing hole 56, be supported via aforementioned bearings.Running shaft 50 is linked on the not shown vehicle motor as external drive source via clutch mechanisms such as magnetic clutchs in the end of front case 16 sides.Thereby, when vehicle motor moves, if running shaft 50 is connected on the vehicle motor by clutch mechanism, then running shaft 50 rotations.
On running shaft 50, swash plate 60 can move axially relatively and can be installed with fascinating.Form through hole 61 on swash plate 60, running shaft 50 connects this through hole 61.In through hole 61, the closer to the both ends open side, the Inner Dimension on the Vertical direction among Fig. 1 is cumulative more, and the shape of cross section at its two end part becomes slotted hole.In addition, on running shaft 50, fixing the swivel plate 62 as the rotation transmission member, it is sticked on the front case 16 via thrust bearing 64.Swash plate 60 rotates integratedly by linkage 66 and running shaft 50, and fascinating of following of permission and axial mobile phase.Linkage 66 comprises: be fixedly arranged at the supporting arm 67 on the swivel plate 62, be fixedly arranged on the swash plate 60 and can be embedded in guide finger 69, the through hole 61 of swash plate 60 and the outer circumferential face of running shaft 50 in the pilot hole 68 of supporting arm 67 slidably.In the present embodiment, formations such as swash plate 60, running shaft 50, linkage 66 make piston 14 reciprocating drive units.
Aforementioned piston 14 is a kind of of hollow piston, has the engagement portion 70 that engages with swash plate 60 and is wholely set, is embedded in the head 72 of the hollow in the cylinder hole 12 with engagement portion 70.Head 72, cylinder hole 12 and the valve plate 20 common pressing chambers that form.Engaging the peripheral part of swash plate 60 on the engagement portion 70 via a pair of hemispheric piston shoes 76.
Rotatablely moving of swash plate 60 converts the linear reciprocating motion of piston 14 to via piston shoes 76.Piston 14 from top dead center to the suction stroke that lower dead center moves, the refrigerant gas in the suction chamber 22 is drawn in the pressing chamber in the cylinder hole 12 via inlet hole 32, suction valve 34.Piston 14 from lower dead center to the compression stroke that top dead center moves, the refrigerant gas of the pressing chamber in the cylinder hole 12 is compressed, and is discharged to via tap hole 36, expulsion valve 38 and discharges in the chamber 24.On piston 14, acting on axial compression reaction force along with the compression of refrigerant gas.Compression reaction force via piston 14, swash plate 60, swivel plate 62 and thrust bearing 64, is born by the housing of compositions such as cylinder body 10, front case 16, rear case 18.On the engagement portion 70 of piston 14, be provided with the rotation limitation part integratedly.The inner peripheral surface of rotation limitation part contact front case 16, limited piston 14 be around the rotation of central axis, avoids conflicting of piston 14 and swash plate 60.
Connect cylinder body 10 ground and be provided with air feed path 80.By this air feed path 80, discharge chamber 24 and be connected in formed swash plate chamber 86 between front case 16 and the cylinder body 10.Be provided with solenoid electric valve 90 midway at air feed path 80.The solenoid 92 of solenoid electric valve 90 carries out excitation and demagnetization by the control gear (not shown) based on computer, and information such as corresponding air conditioner load are controlled the supplying electric current amount and the aperture of regulating solenoid electric valve 90.
Be provided with drain passageway 100 in the inside of running shaft 50.Drain passageway 100 at one end to aforementioned bearing hole 56 openings, and the space opening of the other end in front case 16, and is communicated with swash plate chamber 86 via this opening.Bearing hole 56 is communicated with suction chamber 22 via exhaust port 104.
The tilted-plate compressor of present embodiment is a variable capacity type, utilizes as the discharge chamber 24 of high-pressure refrigerant supply source and pressure difference as the suction chamber 22 of low pressure refrigerant supply source, the pressure in the control swash plate chamber 86.Whereby, the pressure that acts in the cylinder hole 12 of front and back of piston 14 is adjusted with the difference of the pressure of swash plate chamber 86, makes the angle of inclination change of swash plate 60 and the stroke of piston 14 is changed, and the discharge capacity of compressor is adjusted.Specifically, by the excitation of solenoid electric valve 90 and the control of demagnetization, swash plate chamber 86 or with discharge that chamber 24 is communicated with or with discharge chamber 24 partitions, control the pressure of swash plate chamber 86 whereby.
Cylinder body 10 and piston 14 are made by aluminum alloy, implement the coated of fluororesin on the outer circumferential face of piston 14.If coated, then both avoided preventing that with direct contact of metal of the same race burn-back from can subtract narrow and gap cylinder hole 12 as far as possible with fluororesin.Moreover cylinder body 10 and piston 14 preferably are taken as aluminium silicon class metal alloy.But the material of cylinder body 10 or piston 14, the material of coating etc. are not limited to above-mentioned material, also can be other materials.
To piston 14, describe in more detail.The engagement portion 70 of piston 14 roughly becomes the U font, has a pair of arm 108,110 that extends in parallel to each other along perpendicular to the direction of the central axis of head 72, and links the linking department 112 between the cardinal extremity of these arms 108,110.On the mutual opposed side surface of arm 108,110, form recess 114 respectively.The internal surface of these recesses 114 becomes the concave spherical surface shape, and two concave spherical surfaces are positioned on the same sphere.Aforementioned a pair of piston shoes 76 can remain in sphere portion in the recess 114 slidably, contact positive and negative two surfaces (two slip surfaces) of the peripheral part of swash plate 60 in planar surface portion, the peripheral part of swash plate 60 from sandwich.
The head 72 of piston 14, have being of an end opening, the other end sealing cylindric 120 of the hollow cylinder at end shape arranged and be fixed on this cylindric 120, as the lid 122 of the closure member of the opening of closed circular tubular portion 120.The cylindrical wall 126 that has diapire 124 for cylindric 120 and stretch out along the direction that is parallel to the central axis of head 72 from the peripheral part of diapire 124, and in diapire 124, form with the arm 110 of engagement portion 70.These cylindric 120 and engagement portion 70 constitutes the main component 128 of one.Form the heavy section of thickening than other parts of cylindrical wall 126 in the opening side end of cylindrical wall 126.Below, the opening side end is called heavy section 130.The outer circumferential face of cylindrical wall 126 is simple barrel surface, and heavy section 130 is more inwardly given prominence on radial direction than the inner peripheral surface 134 of other parts of cylindrical wall 126 by making inner circumferential surface 132, and becomes heavy wall.On part, form circular piston ring groove 140 and chimeric piston ring 142 arranged corresponding to the heavy section 130 of the outer circumferential face of cylindrical wall 126.
Be used for making the piston blank 160 of the main component 128 that resembles the aforementioned piston 14 that is constituted like this, as shown in Figure 4, have the part that should become the engagement portion engagement portion formation portion 162 and with engagement portion formation portion 162 integrally formed should become cylindric 120 part (being called cylinder formation portion 164).Also be that an end of the hollow cylindrical portion 166 that wall thickness is almost certain is by diapire 168 sealings, the other end opening in cylinder formation portion 164.
There is the roughly shape of cross section of U font in engagement portion formation portion 162 shown in Figure 11, and the top of U font is positioned at the outer circumferential side of piston, and the central axis of cylinder formation portion 164 is with eccentric state setting relatively.The shape of cross section of engagement portion formation portion 162 also can roughly be altered to trapezoidally, and in this occasion, trapezoidal bottom is disposed at outer circumferential side.In the end face 170 of the opposition side of cylindric 120 side of engagement portion formation portion 162, on position, form protuberance 172 corresponding to cylindric 120 center line.Protuberance 172 as shown in figure 11, has the shape of cross section of circular, is provided with two ears 174 of stretching out along mutual opposite direction on its outer circumferential face integratedly.
Piston is an aluminum alloy system with blank 160, is shaped by forging in the present embodiment.Based on Fig. 3 this forming process is described.In Fig. 3, the example of formation piston with the forge mould of the major component of employed forging apparatus in the shaping of blank 160 is shown.But this forge mould 180 have by mutually near and leave and the dynamic model 182 and the fixed die 184 of folding and side blow head 186.But dynamic model 182 remains on the not shown retaining plate, can be installed on the movable plate (not shown) with loading and unloading.Fixed die 184 also remains on the not shown retaining plate, can be installed on the fixed tray (not shown) with loading and unloading.But dynamic model 182 by drive unit relative fixed mould 184 near and leave.
But dynamic model 182 and fixed die 184 can dock mutually at mutual opposed mold joint 190,192 places.On the corresponding mutually position of each mold joint 190,192, form die face 194,196 respectively, delimit corresponding to the cavity of piston with the shape of the profile of blank 160 by these die faces 194,196.Mold joint 190,192 is positioned on the horizontal plane of the center line that contains cylinder formation portion 164 in should forming the part of piston with the cylinder formation portion 164 of blank 160.
At the part place that should form engagement portion formation portion 162, mold joint 190,192, form ladder as shown in phantom in Figure 3, and pass the Vertical direction of the center line of end hollow cylindrical portion 164, just width direction (perpendicular to the direction of paper) size largest portion thickness direction (above-below direction of figure) roughly in the middle of.With reference to Figure 11, the mold joint 190,192 in the engagement portion formation portion 162 passes the position shown in the double dot dash line among this Figure 11.
But the die face 194 of dynamic model 182 has the die face of the part that is used for being formed on a part that is equivalent to the part of a pair of arm 108,110 in the engagement portion formation portion 162 and is equivalent to linking department 112.The die face 196 of fixed die 184 is useful on the die face of the part that forms the remaining part be equivalent to linking department 112.But dynamic model 182 relative fixed moulds 184 are approaching on the above-below direction of Fig. 3, leave.
Side blow head 186 is cylindric, but along on it is axial, being provided with movably near the direction vertical with the direction of leaving (being substantially horizontal in the present embodiment) with dynamic model 182 relative fixed moulds 184.In addition, but side blow head 186 can move with moving in linkage of dynamic model 182, but and be provided with fixed die 184 and dynamic model 182 approaching left the movement transforming device that movement conversion becomes the axial motion of side blow head 186.Perhaps, also the drive unit of side blow head 186 special uses can be set, but link in dynamic model 182 to fixed die 184 near and leave, thereby near and leave two moulds 182,184.
But under the state that fixed die 184 and dynamic model 182 are opened, the forged material of placing aluminium alloy on the die face 196 of fixed die 184.Then, but dynamic model 182 action by drive unit near fixed die 184, when docking with aforementioned forged material, the plastic deformation of forged material begins.When but dynamic model 182 docked with the mold joint 190,192 of fixed die 184, engagement portion formation portion 162 was by 194,196 its end that are shaped of two die faces.In but this state downside drift 186 was charged into the intermediate that is retrained by dynamic model 182 and fixed die 184, cylinder formation portion 164 pattern faces 194,196 and side blow head 186 were shaped.The inner peripheral surface 200 that forms the simple barrel surface of cylinder formation portion 164 is shaped with the outer circumferential face and the front-end face of bottom surface 202 by side blow head 186.
After piston finishes with the shaping of blank 160, but under the state that piston is retrained by dynamic model 182 and fixed die 184 with blank 160, side blow head 186 is from 164 disengagings of cylinder formation portion.Then, but dynamic model 182 leave from fixed die 184, take out piston with blank 160.
The piston that is shaped then supplies to the undergauge operation with blank 160 like this.In this undergauge operation, piston with the opening side end of the hollow cylindrical portion 166 of blank 160 by plastic working by undergauge.Spinning operation with regard to a kind of mode of this undergauge operation describes.Moreover, respectively as shown in Figure 4, before the spinning operation, be pre-formed center hole 210,212 on the center of cylinder formation portion 164 bottom surfaces 202 of piston usefulness blank 160 and the protuberance 172.
The major component of employed device 220 in this spinning operation is shown in Fig. 7～Figure 10.Spinning device 220, as shown in Figure 7, have the formation of similar three jaw chuck, on one side the axisymmetric position of the central axis that can keep relative apparatus main body 222 relation is arranged, Yi Bian a plurality of (in this form of implementation being three) spinning roller 224 approaching to this central axis and that leave.Three spinning rollers 224 are provided with at interval with equal angles.On apparatus main body 222, maintain three mobile members 228 that can move along the straight line vertical with aforementioned central axis, spinning roller 224 is rotatably supported in respectively on these mobile members 228 via supporting axle 230.
Spinning device 220 has roller shifter 234 shown in Figure 8.Apparatus main body 222 as shown in Figure 8, has main part 236 that roughly becomes the hollow cylinder shape and the shut 238 that seals the opening of main part 236 1 ends.In main part 236, form and accommodate recess 239.In the inner space that this opening of accommodating recess 239 forms by shut 238 sealings, disposing roller shifter 234.Accommodating recess 239 is shoulder holes that large diameter hole 240 and small diameter bore 242 are arranged, and large diameter hole 240 is by aforementioned shut 238 sealings.
Roller shifter 234 comprises rotating disc 244 and the drive unit 246 that drives these rotating disc 244 rotations.Rotating disc 244 roughly becomes discoideus, rotatably is contained in the large diameter hole 240 of main part 236.In the small diameter bore 242 of main part 236, can keep quill shaft 248 rotatably via bearing 247, on an end of this quill shaft 248 (right-hand member among Fig. 8), be provided with rotating disc 244 integratedly.On the right flank 250 of rotating disc 244, be provided with diameter integratedly less than circular guide member 252 of being of rotating disc 244 external diameters, on this guide member 252, form gyrate groove 254.With the face of the installation spinning roller 224 1 side opposition sides of mobile member 228 on, form a plurality of teeth 258 (with reference to Fig. 8) with aforementioned grooves 254 engagements.Mobile member 228 has the guide portion 262 shown in Fig. 9, and the width of this guide portion 262 is set for narrower than other parts.On shut 238, form three guiding grooves 264 that extend along radial direction at interval respectively with equal angles.Each mobile member 228 is sticked in the guiding groove 264 in this guide portion 262, axially can not break away from, and can not move in fact at circumferencial direction.Thereby along with 244 rotations of operation rotating disc, three mobile members 228 are directed to groove 264 synchronously the moving radially along apparatus main body 222 of leading.Whereby, three spinning rollers 224 keep mutually axisymmetric relations ground near with leave.
Drive unit 246 as shown in figure 10, has the oil hydraulic motor 282 that worm gearing 280 and conduct drive the driving source of this worm gearing 280.Rotating disc 244 has a plurality of teeth on outer circumferential face, as worm gear 284 performance functions.On worm gear 284, meshing worm screw 286.Can be supported on rotatably on the main part 236 via bearing 292,294 respectively from the supporting axle 288,290 of the outstanding minor diameter in the axial two end part of worm screw 286.The recess 296 of accommodating of accommodating worm screw 286 is communicated with large diameter hole 240.A supporting axle 290 extends more longways than another supporting axle 288, forms spline 300 at its front end.Spline 300 is embedded in the splined hole 304 on the output shaft 302 that is located at oil hydraulic motor 282.On oil hydraulic motor 282, be provided with the hydrostatic sensor 306 (with reference to Figure 12) of the hydraulic coupling that detects motor, can control hydraulic coupling accurately.Moreover it also is possible replacing oil hydraulic motor 282 and adopting electric motor.
As shown in Figure 8, the axle 310 as heart member can remain on the main part 236 rotatably around the central axis of main part 236.Axle 310 can be supported on the inside of quill shaft 248 coaxially and via bearing 312 rotatably, connects shut 238 and outstanding part is bigger than other section diameters, becomes large-diameter portion 314.Large-diameter portion 314 has the external diameter of the internal diameter of the inner peripheral surface 200 that is slightly smaller than piston usefulness blank 160.
In addition, in the outside of apparatus main body 222, on axle 310 coaxial, be provided with and this axle 310 opposed top 318 (with reference to Fig. 5 (a)).In the present embodiment, top 318 is movable, by top shifter 319 (with reference to Figure 12) phase center roller 310 vertically near and leave.In addition, around top 318, be provided with rotating driving device (not shown), utilize the large-diameter portion 314 and top 318 and finish under the state to core of axle 310 with blank 160 at piston, the torque transmission member 320 (with reference to Figure 11) of aforementioned rotating driving device approaches the side of piston with the ear 174 of blank 160.And if aforementioned rotating driving device starting, engaging of the side of then its rotation (among Figure 11 shown in the arrow) by torque transmission member 320 and ear 174 is delivered to piston usefulness blank 160.In the present embodiment, rotating driving device comprises the oil hydraulic motor 322 (with reference to Figure 12) as its driving source.On this oil hydraulic motor 322, also be provided with hydrostatic sensor 324, can control hydraulic coupling accurately as the detection device that detects hydraulic coupling.
Aforementioned spinning device 220 is controlled by control gear 326 shown in Figure 12.Control gear 326 is based on computer, and each hydrostatic sensor 306,324 of aforementioned hydraulic motor 282,322 is connected on the input part of control gear 326.Oil hydraulic motor 282, oil hydraulic motor 322 and top shifter 319 (seeing these control valve device for details) are connected on the carry-out part of control gear 326 via driving loop (not shown).
In the spinning operation, shown in Fig. 5 (a), after the front end of the large-diameter portion 314 of aforementioned axle 310 was sticked in the center hole 210 of bottom surface 202, top 318 near axle 310, and top 318 front end is sticked in the center hole 212 of protuberance 172.Whereby, the piston of forging and molding is supported from both sides under the state to core with blank 160.Then, be located at the aforementioned rotating driving device starting of top 318 sides, piston is rotated with blank 160.Under the state of piston with blank 160 rotation, the starting by drive unit 246 makes rotating disc 244 rotations.So three spinning rollers 224 synchronously move towards approaching the direction of piston with the hollow cylindrical portion 166 of blank 160, contact with the outer circumferential face 328 of the opening side end of hollow cylindrical portion 166.If the further driving by drive unit 246 makes spinning roller 224 push down outer circumferential face 328, the then opening side end plastic deformation of hollow cylindrical portion 166 is by undergauge.At this moment, the undergauge limit of opening side end is stipulated by the outer circumferential face 316 of axle 310.Thereby the outer circumferential face 316 of axle 310 is as the device specifies performance function of undergauge limit.
Reached the CLV ceiling limit value that sets if detected the hydraulic coupling of the oil hydraulic motor 282 of drive unit 246 by hydrostatic sensor 306, then the pushing force of spinning roller 224 keeps this state constant, and piston rotates certain amount with blank 160.In the present embodiment, piston revolves with blank 160 and turns around.Whereby, the opening side end of hollow cylindrical portion 166 spreads all over circumferencial direction ground undergauge.Remaining in the pushing force that such spinning roller 224 produces under the state of certain value makes piston a certain amount of with blank 160 rotations, though it is essential, but in order to spread all over the opening side end diameter reducing that whole circumference makes hollow cylindrical portion 166 reliably, preferably like this.
Rotated a commentaries on classics if detect piston with blank 160, then stopped the oil hydraulic motor 322 of aforementioned rotating driving device, piston stops with the rotation of blank 160.Then, pushing hollow cylindrical portion 166 removed in rotating disc 244 counterrotatings and three spinning rollers 224 leave mutually.Then, top 318 leave axle 310, take out piston blank 160.So, the axial part of hollow cylindrical portion 166 (occasion of present embodiment, opening side end) goes up and forms the diameter reducing part 330 littler than other section diameters, and other parts become non-diameter reducing part 332.
Next, on the outer circumferential face 328 of hollow cylindrical portion 166, carry out cutting.Describe based on Fig. 5 (b) with regard to this cutting operation.Be sticked in two center holes 210,212 and form under the state to core a pair of top 338,340, piston is supported from both sides with blank 160, leans on cutter 342 to comprise the cutting of part of the outer circumferential face 328 of hollow cylindrical portion 166.Though a pair of top 338,340 also can lean on not shown shifter to move vertically together, in the present embodiment, make top moving, make another top fixing.By aforementioned cutting, make the external diameter of non-diameter reducing part 332 identical with the external diameter of diameter reducing part 330, on part, be formed at heavy section 130 inwardly outstanding on the radial direction corresponding to diameter reducing part 330.Moreover, also can heart member is embedded on the inner peripheral surface of diameter reducing part 330 and be sticked in the center hole 212 top jointly from the two-side supporting piston with under the state of blank 160, carry out cutting.
In addition, in lid 122 and cylinder formation portion 164 chimeric before, implement machining at the inner peripheral surface and the opening side end face of heavy section 130.Under the state of the outer circumferential face 328 of the hollow cylindrical portion 166 that keeps having carried out cutting with not shown anchor clamps, with tool processes inner peripheral surface 132 and opening side end face 158, form with the same level of goods end hollow cylindrical portion 120 (with reference to Fig. 6) arranged.
In the present embodiment, lid 122 is also made by forging.As shown in Figure 6, in the bottom wall portion 146 of lid 122, with the center of the end face of embedding part 150 opposite sides, be provided with protuberance 346 integratedly.On this protuberance 346, be pre-formed center hole 348.
In the opening that embedding part 150 insertions of lid 122 are cylindric 120, the outer circumferential face of embedding part 150 is embedded on the inner peripheral surface 132 of heavy section 130.Dock with the end face 148 of lid 122 and stipulated under the state of the chimeric degree of depth at cylindric 120 opening side end face 158, cylindric 120 is that face of weld by welding fix with opening side end face 158 with end face 148 with lid 122.And, top (with reference to Fig. 5 (b) top 338,340) be sticked in respectively in two center holes 212,348 and under forming the state of core from two-side supporting.Then, form circular piston ring groove 140 on the outer circumferential face of heavy section 130 (diameter reducing part 330), piston ring 142 (with reference to Fig. 2) is embedded in this groove 140.Then, also can carry out the fine finishing of the outer circumferential face of cylindrical wall 126 as required.Moreover the processing of piston ring groove 140 also can be carried out before fixing with lid 122 at cylindric 120.Form the head 72 of hollow like this.
Then, on the outer circumferential face of head 72, carry out coating at least, form coating.In addition, remove protuberance 172,346 and each end face of cutting.Also implement machining in the engagement portion formation portion 162 of piston with blank 160.Shown in double dot dash line among Fig. 6, in the axial substantial middle portion of engagement portion formation portion 162, form groove 350 by cutting, form a pair of arm 108,110 and linking department 112 whereby.In addition, form the recess 114 that keeps piston shoes 76 usefulness, finish engagement portion 70.Like this, obtain the piston 14 shown in Fig. 2.
According to present embodiment, by make piston with the opening side end plastic deformation of the hollow cylindrical portion 166 of blank 160 undergauge, then, make diameter reducing part 330 identical, can form heavy section 130 whereby with the external diameter of non-diameter reducing part 332 by cutting outer circumferential face 328.Thereby the inner peripheral surface by cutting hollow cylindrical portion with resembling always forms heavy section and compares, and it is easy that the formation of heavy section becomes.
In addition, because the outer circumferential face of the head 72 of piston 14 is necessary to be embedded in accurately on the inner peripheral surface of cylinder hole, so cutting is absolutely necessary.If cutting becomes diameter reducing part 330 identical with the external diameter of non-diameter reducing part 332 when this cutting, then can shorten the required time of cutting, improve operating efficiency.And then, if form the inner peripheral surface 200 and the bottom surface 202 of cylinder formation portion 164 by side blow head 186, then do not need to lid 122 the inner peripheral surface beyond the inner peripheral surface of chimeric heavy section 130 carry out machining, perhaps carry out with little machining allowance, from this point, also improve operating efficiency, in addition, because reduce the waste of material so can reduce manufacture cost.
And then, be fixed with the occasion of end hollow cylindrical portion 120 and lid 122 like this by welding resembling present embodiment, can be by forming heavy section 130 area of the face of weld formed of enlarged opening side end face 158 and end face 148, improve weld strength.By only thickening the wall of the part that forms piston ring groove 140 like this, other parts are done into thin-walled, can seek the lightweight of piston 14.
Though in the present embodiment, the example as formed circular groove on the outer circumferential face of diameter reducing part is illustrated with regard to piston ring groove 140, also can form the circular groove that is used for keeping lubricant oil on the outer circumferential face of diameter reducing part.In addition, in the undergauge operation, carry out the opening side end of the hollow cylindrical portion that is not limited to of undergauge, so long as an axial part, as hollow cylindrical portion axially on intermediate portion etc. get final product, and the circular groove of formation is not absolutely necessary on diameter reducing part.Even in the occasion that does not form circular groove, by form heavy section in the opening side end, because in the occasion that end hollow cylindrical portion and obstruction component are arranged by solder bond, can strengthen the area of face of weld as mentioned above, in occasion by adhesive bond, can strengthen bond area, so any advantage that all obtains increasing adhesive strength.
Also can come the machining piston blank by casting.In this occasion, can use the casting device that has with the roughly the same formation of forging apparatus shown in Fig. 3.Casting device has pair of metal mould and core, is shaped piston with the profile of blank by the pair of metal mould, by the outer circumferential face of slide core inner peripheral surface and the bottom surface of piston with blank that be shaped.In addition, closure member also can be made by casting.
Also can utilize the pressure processing that has adopted metal pattern to implement the undergauge operation.Based on Figure 13 an one mode of execution is described.On the main body 400 of press machine, fixing metal pattern 402.Inside at metal pattern 402 forms pull and stretch hole 410, and this pull and stretch hole 410 has the large diameter hole portion 406 of opening side and the small diameter bore portion 408 of main body 400 sides.In main body 400 inside, on the axle identical, be provided with axle 412 as heart member with the pull and stretch hole 410 of main body 400, its front end extends to the large diameter hole portion 406 in pull and stretch hole 410.Large diameter hole portion 406 has the internal diameter of the external diameter of the hollow cylindrical portion 166 that is a bit larger tham piston usefulness blank 160.
The outer circumferential face of axle 412 is set the internal diameter that is slightly smaller than small diameter bore portion 408 for, and the radial dimension in the gap of defined is set the thickness of the perisporium that is a bit larger tham hollow cylindrical portion 166 between the outer circumferential face of the inner peripheral surface of small diameter bore portion 408 and axle 412.In main body 400, protruding member 416 can be configured on the axle identical with axle 412 vertically movably, and can be between the outer circumferential face of the inner peripheral surface of small diameter bore portion 408 and axle 412 slides in the space of defined.Protruding member 416 moves forward and backward by drive units such as oil hydraulic cylinders.
Another mode of execution of the undergauge operation of utilizing the hollow cylindrical portion that the pressure processing that adopted metal pattern carries out is described based on Figure 14 and Figure 15.Also be that though use metal pattern 502, its formation is different with aforementioned each form of implementation in the present embodiment.Metal pattern 502 is divided into a plurality of along circumferencial direction, having can undergauge and the cutting apart mould 504 and be embedded in the outer shroud 506 of the outer circumferential side of cutting apart mould 504 of hole enlargement.The metal pattern 502 of this form of implementation as shown in Figure 15, is divided into six die components 503 at interval with equal angles.
The inner peripheral surface of cutting apart mould 504 jointly forms the nib of being made up of large diameter hole portion 510 and small diameter bore portion 514 516.Piston can be embedded in the small diameter bore portion 514 of cutting apart mould 504 that is in the hole enlargement state with the hollow cylindrical portion 166 of blank 160.Lip part from the inner peripheral surface of the opening side end of small diameter bore portion 514 in radial direction to extension, form shoulder face 520.The outer circumferential face of cutting apart mould 504 becomes taper outer circumferential face 522, and the inner peripheral surface of outer shroud 506 becomes the taper inner peripheral surface 524 corresponding to this taper outer circumferential face 522.By back-up ring 526 stopping devices such as grade, prevent to cut apart mould 504 and deviate from from outer shroud 506.
In the axial both sides of cutting apart mould 504, be provided with opposed the 1st drift 530 and the 2nd drift 532 mutually.The not shown pressure head of the 1st drift 530 depended on pressure machines, the 2nd drift 532 is by the not shown drive units such as oil hydraulic cylinder in the main body 534 that is disposed at press machine in addition, respectively metal pattern 502 axially on move forward and backward.The 1st drift 530 and the 2nd drift 532 advance when approaching metal pattern 502, retreat when leaving metal pattern.On the face that is opposite to the 2nd drift 532 1 sides of the 1st drift 530, formation can be accommodated the recess 536 of piston with the engagement portion formation portion 162 of blank 160.The 2nd drift 532 roughly becomes cylindrical shape, and portion is provided with the axle 540 as heart member coaxially within it.Axle 540 has the length in the large diameter hole portion 510 that arrives the nib 516 of cutting apart mould 504.
On the mutual opposed side of a plurality of die components 503, as shown in figure 15, form recess 542 respectively.Recess 542 is along cutting apart axially forming of mould 504 on a plurality of positions that separate, crossing over mutually, opposed per two recesses 542 dispose a hole enlargement member 546.Though the hole enlargement member can be formed by resilient members such as rubber component, springs, in the present embodiment, form by rubber component.Die component 503 and hole enlargement member 546 constitute cuts apart mould 504.
In the undergauge operation that makes piston with hollow cylindrical portion 166 undergauges of blank 160, be that forward end is inserted in the nib 516 of cutting apart mould 504 with blank 160 with hollow cylindrical portion 166 by the piston that forges or cast formed thereby.The opening side end of hollow cylindrical portion 166 is embedded in the small diameter bore portion 514 of nib 516, and by docking of opening side end face and shoulder face 520, the regulation piston is with the embedding limit of blank 160.Then, the 1st drift 530 advances, and engagement portion formation portion 162 is contained in the recess 536, and the front-end face of the 1st drift 530 docks with the opening side end face of cutting apart mould 504.As a result, cut apart mould 504 and be pushed to the 2nd drift 532 sides, whereby in outer shroud 506 by undergauge, meanwhile the opening side end of hollow cylindrical portion 166 is by undergauge.
Along with the undergauge of this opening side end, hole enlargement member 546 produces resiliently deformable 503 of the die components of cutting apart mould 504.The undergauge limit of opening side end is stipulated by the outer circumferential face of axle 540.If the undergauge of opening side end finishes, then the 1st drift 530 retreats, and the 2nd drift 532 advances, and cuts apart that mould 504 is urged with blank 160 with piston and to the 1st drift 530 side shiftings.Meanwhile, cut apart the elastic force hole enlargement of mould 504 by hole enlargement member 546, piston is released with blank 160, takes out.The 1st drift 530 is as pushing member, and the 2nd drift 532 is brought into play function respectively as protruding member, and aforementioned outer shroud the 506, the 1st drift 530 and the 2nd drift 532 constitute scalable device.
Describe with another form of implementation of the forming process of blank based on Figure 16 piston of the present invention that just is shaped.Forming process in this form of implementation comprises by forging or cast form piston and uses the 1st forming process of blank and keep this piston makes other part hole enlargements with the part of the hollow cylindrical portion of blank hole enlargement operation.About by forge or the cast form piston with the operation of blank, because the front makes an explanation, so omit its explanation here.
Employed former in the hole enlargement operation, have can folding pair of metal mould 602,604.Under the involutory state of pair of metal mould 602,604, inner formation corresponding to the die cavity 606 of piston with the profile of blank 160.But in the part corresponding to the profile of hollow cylindrical portion 166 of die cavity 606, the part beyond the opening side end is the large diameter hole portion 610 with internal diameter of the external diameter that is a bit larger tham hollow cylindrical portion 166.The part corresponding to the opening side end of hollow cylindrical portion 166 of die cavity 606 is called small diameter bore portion 612.
By forging or the piston of casting formed thereby is contained in blank 160 under the state in the metal pattern 602,604, metal pattern 602,604 matched moulds, on the piston usefulness opening side inner peripheral surface of blank 160, chimeric forcing pipe 616 cylindraceous.On near the outer circumferential face the opening side end of forcing pipe 616, disposing sealing components 618 such as O shape circle, keep by the liquid seal in forcing pipe 616 inside and the hollow cylindrical portion 166 inner formed spaces.Preferably to supply to hollow cylindrical portion 166 volume inside via forcing pipe 616 at a high speed, the perisporium beyond the opening side end of hollow cylindrical portion 166 expands to outer circumferential side fluid (liquid or gas) whereby.That is to say, in the present embodiment, carry out the hole enlargement operation by the bulging method.
The limit of aforementioned expansion is stipulated by the inner peripheral surface of large diameter hole portion 610.Metal pattern 602,604 is from outside constraint hollow cylindrical portion 166.By being expanded laterally, opening side end part in addition make it become major diameter like this, the result, and the diameter of the opening side end of hollow cylindrical portion 166 becomes less than other parts.And, same with the front with reference to the occasion that Fig. 5 (b) illustrates, in the cutting operation, carry out cutting by outer circumferential face to hollow cylindrical portion 166, make the opening side end of the minor diameter of hollow cylindrical portion 166, identical with the external diameter of the large-diameter portion of in addition part.Moreover the bulging operation also can make liquid be full of in the hollow cylindrical portion, by plunger is pushed in the opening of this hollow cylindrical portion, hydraulic pressure is risen carry out.
The piston blank also can have two blanks between the part that should become the engagement portion by binding, or two blanks that are connected with part that should become head and the part that should become the engagement portion constitute.In addition, also can constitute with the blank a plurality of blanks that link in upright arrangement by the piston more than three.
Piston is with blank and closure member, also can be with the fixation method beyond the welding, for example, comprise that other fixation methods bonding, tightly chimeric, threaded joint or their combination fix.Also can be by the metallic material beyond the aluminum alloy, for example magnesium alloy forms at least one side of piston with blank and closure member.By bonding, riveted joint and fixed piston with the occasion of blank with closure member, closure member also can be formed by the resin of suitable these fixation methods.If closure member is simple shapes such as plectane, then the machining of general blanks such as bar that also can be by market sale is made.
Piston also can be the mode that closure member and engagement portion form, the opening that end hollow cylindrical member is arranged of head seals by closure member, perhaps, piston also can be to cut apart in the axial centre of head and comprise the mode that has engagement portion one side and do not have engagement portion one side.The present invention also can apply to the single head pison that the fixed capacity tilted-plate compressor is used, or the double-head piston of head is arranged in the both sides with the engagement portion of swash plate.
Though more than, describing embodiments of the present invention in detail, these are expression for example only, can implement the present invention in the mode of implementing all changes, improvement based on industry technician's knowledge.
Claims (10)
1. the manufacture method of a piston for compressor is characterized in that, comprising:
Shaping has the forming process of the piston of hollow cylindrical portion with blank,
Make this piston a part of undergauge by plastic working, form the undergauge operation of diameter reducing part and non-diameter reducing part on blank at piston with the hollow cylindrical portion of blank, and
After this undergauge operation,, make the diameter reducing part cutting operation identical with non-diameter reducing part external diameter by the outer circumferential face of cutting piston with blank.
2. the manufacture method of piston for compressor as claimed in claim 1 is characterized in that, aforementioned undergauge operation comprises a part of undergauge that makes aforementioned hollow cylindrical portion by spinning.
3. the manufacture method of piston for compressor as claimed in claim 1 or 2, it is characterized in that, aforementioned piston has an end hollow cylindrical portion with what blank comprised the end sealing of aforementioned hollow cylindrical portion and the other end opening, and aforementioned undergauge operation comprises makes this that opening side end diameter reducing of end hollow cylindrical portion be arranged.
4. as the manufacture method of each described piston for compressor of claim 1 to 3, it is characterized in that, be included on the outer circumferential face of aforementioned diameter reducing part and form circular groove by cutting.
5. the manufacture method of piston for compressor as claimed in claim 1 is characterized in that, makes aforementioned piston blank by forging in aforementioned forming process.
6. the manufacture method of piston for compressor as claimed in claim 1, it is characterized in that, after aforementioned cutting operation, implement to form the operation of hollow head, this hollow head is being by being entrenched under the state on the inner peripheral surface of opening side end of aforementioned hollow cylindrical portion embedding part on the end face that is formed at aforementioned closure member, aforementioned closure member is fixed in the aforementioned hollow cylindrical portion form.
7. the manufacture method of a piston for compressor has:
Make the operation of piston by forging, that is, to be shaped piston with the inner peripheral surface of the cylinder formation portion of blank and the forming process of bottom surface by the side blow head with blank,
Form center hole at piston respectively on the bottom surface of blank and protuberance, by respectively with the axle and top being fastened in the corresponding center hole of spinning device, with piston with blank to core and from the operation of two-side supporting,
Make a plurality of spinning rollers synchronously approaching, make the opening side end diameter reducing of hollow cylindrical portion, in hollow cylindrical portion, form the diameter reducing part of heavy wall and the operation of non-diameter reducing part,
The cutting of the outer circumferential face by hollow cylindrical portion is processed into the external diameter of non-diameter reducing part identical with the external diameter of diameter reducing part, forms the operation of heavy section on the opening side end of hollow cylindrical portion, and
On the outer circumferential face of this heavy section, form the operation of circular piston ring groove.
8. piston, be with compressor in the piston of set driving component concerted action, it is characterized in that, this piston has stem and head, piston is attached on the driving component by this stem, aforementioned head comprises cylindric and the lid of this open end of sealing with at least one open end, and aforementioned open end reduces its internal diameter by undergauge.
9. piston as claimed in claim 8 is characterized in that, forms circular groove on the periphery of aforementioned open end, and chimeric in this groove have a piston ring.
10. piston as claimed in claim 8 is characterized in that aforementioned piston is an aluminum alloy system, is shaped by forging.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2002/001076 WO2003067088A1 (en) | 2000-08-16 | 2002-02-08 | Piston for compressor and method for manufacturing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1535358A true CN1535358A (en) | 2004-10-06 |
Family
ID=34308179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA028148886A Pending CN1535358A (en) | 2002-02-08 | 2002-02-08 | Piston for compressor and method for mfg. the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1535358A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423843A (en) * | 2011-11-02 | 2012-04-25 | 山东滨州渤海活塞股份有限公司 | Manufacturing process of solid cold-spun forged steel piston with internal cooling oil chamber |
| CN101680438B (en) * | 2007-05-29 | 2012-11-28 | 三电有限公司 | Production method of piston for compressor |
| CN103154584A (en) * | 2010-10-09 | 2013-06-12 | 辉门布尔沙伊德有限公司 | Method for producing a piston ring |
| CN104439031A (en) * | 2014-11-26 | 2015-03-25 | 慈溪市天润电器实业有限公司 | Cold heading forming manufacturing method for piston part of refrigeration compressor |
| CN105917107A (en) * | 2014-03-13 | 2016-08-31 | 日立汽车系统株式会社 | Production device for piston for internal-combustion engine, and production method using production device for piston for internal-combustion engine |
| CN106312603A (en) * | 2015-07-10 | 2017-01-11 | 强哲菲 | Automatic precise clamp and production line for piston machining |
| CN109604475A (en) * | 2018-12-07 | 2019-04-12 | 中国航发南方工业有限公司 | The manufacturing process of high temperature alloy circular thin-wall closed pockets |
| CN109702067A (en) * | 2018-12-26 | 2019-05-03 | 浙江长兴和良智能装备有限公司 | A kind of pipe fitting spin-on process and the improved spinning machine of structure |
| CN109746361A (en) * | 2019-02-01 | 2019-05-14 | 华南理工大学 | A kind of metal plate engine piston room temperature near net plastic molding method |
| CN113195126A (en) * | 2018-12-26 | 2021-07-30 | 日本斯频德制造株式会社 | Spinning device, spinning method, and processing roller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101680438B (en) * | 2007-05-29 | 2012-11-28 | 三电有限公司 | Production method of piston for compressor |
| CN103154584A (en) * | 2010-10-09 | 2013-06-12 | 辉门布尔沙伊德有限公司 | Method for producing a piston ring |
| US8973262B2 (en) | 2010-10-09 | 2015-03-10 | Federal-Mogul Burscheid Gmbh | Method for producing a piston ring |
| CN103154584B (en) * | 2010-10-09 | 2015-07-15 | 辉门布尔沙伊德有限公司 | Method for producing a piston ring |
| CN102423843B (en) * | 2011-11-02 | 2013-06-05 | 山东滨州渤海活塞股份有限公司 | Manufacturing process of solid cold-spun forged steel piston with internal cooling oil chamber |
| CN102423843A (en) * | 2011-11-02 | 2012-04-25 | 山东滨州渤海活塞股份有限公司 | Manufacturing process of solid cold-spun forged steel piston with internal cooling oil chamber |
| CN105917107B (en) * | 2014-03-13 | 2018-08-24 | 日立汽车系统株式会社 | The manufacturing method of the manufacturing device of piston for IC engine and the piston |
| CN105917107A (en) * | 2014-03-13 | 2016-08-31 | 日立汽车系统株式会社 | Production device for piston for internal-combustion engine, and production method using production device for piston for internal-combustion engine |
| CN104439031A (en) * | 2014-11-26 | 2015-03-25 | 慈溪市天润电器实业有限公司 | Cold heading forming manufacturing method for piston part of refrigeration compressor |
| CN106312603A (en) * | 2015-07-10 | 2017-01-11 | 强哲菲 | Automatic precise clamp and production line for piston machining |
| CN106312603B (en) * | 2015-07-10 | 2018-10-23 | 强哲菲 | Automatic precision clamps and production line for Piston Machining |
| CN109604475A (en) * | 2018-12-07 | 2019-04-12 | 中国航发南方工业有限公司 | The manufacturing process of high temperature alloy circular thin-wall closed pockets |
| CN109604475B (en) * | 2018-12-07 | 2020-02-07 | 中国航发南方工业有限公司 | Forming method of high-temperature alloy thin-wall annular closed groove |
| CN109702067A (en) * | 2018-12-26 | 2019-05-03 | 浙江长兴和良智能装备有限公司 | A kind of pipe fitting spin-on process and the improved spinning machine of structure |
| CN113195126A (en) * | 2018-12-26 | 2021-07-30 | 日本斯频德制造株式会社 | Spinning device, spinning method, and processing roller |
| CN109702067B (en) * | 2018-12-26 | 2023-11-10 | 浙江长兴和良智能装备有限公司 | Spinning method for pipe fitting and spinning machine with improved structure |
| CN113195126B (en) * | 2018-12-26 | 2024-02-13 | 日本斯频德制造株式会社 | Spinning device, spinning method and processing roller |
| CN109746361A (en) * | 2019-02-01 | 2019-05-14 | 华南理工大学 | A kind of metal plate engine piston room temperature near net plastic molding method |
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