CN1371778A - Method for forming piston hollo head of rotary inlined disc type compressor - Google Patents
Method for forming piston hollo head of rotary inlined disc type compressor Download PDFInfo
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- CN1371778A CN1371778A CN 01111932 CN01111932A CN1371778A CN 1371778 A CN1371778 A CN 1371778A CN 01111932 CN01111932 CN 01111932 CN 01111932 A CN01111932 A CN 01111932A CN 1371778 A CN1371778 A CN 1371778A
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Abstract
The method for forming hollow head of piston of rotary cam-type compressor includes the following steps: fixing a closed component on a hollow cylindrical component whose one end of its two ends is opened at least so as to close the opened end of said hollow cylindrical component, applying a welding energy beam on the welding surfaces of said closed component and said hollow cylindrical component, said welding surfaces are mulually adjacent or contaced, so that the welding surfaces of them are mutually connected.
Description
The present invention is based on the Japanese patent application No.11-238547's that submitted on August 25th, 1999, comprises hereinto and with reference to the content of this application.
The present invention relates to a kind of by a packaged unit being welded on one at least on the hollow cylindrical member of the end opening in the two ends, thereby seal the openend of this hollow cylindrical member, and be formed for the method for hollo head of the piston of swash-plate-type compressor.
Comprise all that around rotating driveshaft that its axis rotates, a wobbler that is supported rotationally by this driving shaft and each pack into slidably a head and in the casing bore that forms on the compressor cylinder body slidably mates in the swash-plate-type compressor of one group of piston of neck of this wobbler having one, piston moves back and forth by the rotation of the wobbler that rotates with driving shaft.In this case, the weight of wishing piston reduces, particularly when be installed in a wobbler with respect to the variable capacity type swash-plate-type compressor of the angle change of the direction of vertical drive axis in the time, and when in the fixing volum-controlled type swash-plate-type compressor in the angle of inclination that is installed in a wobbler.Reduce in the effort of piston weight attempting, proposed to make piston with hollo head.The hollo head of piston is by being welded on a packaged unit one at least on the hollow cylindrical member of the end opening in the two ends, thereby seals the openend of this hollow cylindrical member and make.The packaged unit transmitted beam can weld such as electron beam welding or laser beam and weld and be fixed on this hollow cylindrical member.
Packaged unit is being welded on the hollow cylindrical member, thereby seal its openend and form in the process of hollo head of piston, the welding beam is radiated on these two parts along the direction that is parallel to the interface (face of weld) between the inside and outside periphery of these two parts usually, wherein these peripheries are close to mutually or keep in touch, thereby these two parts are connected to each other together by the welding beam that is radiated at the there at these periphery places.The periphery of two parts of near each other or tight contact must be made like this, so that extend along the specific direction that depends on welding condition, makes the welding beam be radiated on this periphery along the direction that is parallel to this interface.In other words, to make the interface between these surfaces be suitable difficulty along the circumferential surface that extends for the mechanical strength or the durability that improve piston and the desired or suitable direction of purpose that reduces manufacturing cost in formation.In addition, said method may undesirably cause the variation of weld strength at the interface.
The present invention makes according to above-mentioned background technology.An object of the present invention is to provide a kind of method of hollo head of the piston that is formed for swash-plate-type compressor, this method has guaranteed the high-freedom degree of the periphery bearing of trend of hollow cylindrical member and packaged unit, has avoided the variation of weld strength at the interface simultaneously.
Above-mentioned purpose can realize that for should be readily appreciated that the present invention, other form is numbered and be subordinated to every kind of all similar appended claim of form, to be suitable for indicating and illustrating may making up of technical characterictic of the present invention according to one of following form of the present invention or pattern.Should be understood that, the invention is not restricted to following technical characterictic and combination thereof.It is to be further understood that the following any technical characterictic that combines with the other technologies feature can be a theme of the present invention, irrelevant with those other technologies features.
(1) a kind of method of hollo head of the piston that is formed for swash-plate-type compressor comprises step: a packaged unit is fixed to one at least on the hollow cylindrical member of the end opening at two ends, thereby seals the openend of this hollow cylindrical member; And the face of weld of giving this packaged unit and hollow cylindrical member applies a welding beam, the wherein contiguous mutually or contact of this face of weld, thereby packaged unit and hollow cylindrical member are connected to each other at the face of weld place, it is characterized in that welding the beam edge and are radiated on the face of weld of packaged unit and hollow cylindrical member with the direction that this face of weld intersects.
In the method for above-mentioned form according to the present invention (1), this hollow cylindrical member can be at the one or both ends at its two ends opening.In the effort of attempting to minimize hollow cylindrical member and the packaged unit interconnected welding portion by welding, recommendable is that this hollow cylindrical member is only at the end opening at its two ends.In this case, a side opening of the piston end surface that this hollow cylindrical member can be made in correspondence, wherein the compression chamber in the compressor is determined on this end face part ground.As selection, this end face can be at the opposite side opening away from piston end surface.When piston comprises one when being enclosed in head and in the corresponding casing bore that forms in the cylinder block of compressor and meshing the neck of radially outer of wobbler slidably by a pair of slide block, this hollow cylindrical member can be made with whole neck part, and can be by a packaged unit in its openend sealing away from neck and corresponding piston end surface, wherein piston end surface matches with casing bore and determines the compression chamber.As selection, this hollow cylindrical member can be by the packaged unit made from whole neck part in its openend sealing.
When these two parts were fixed together by welding at its face of weld place contiguous mutually or contact, laser beam was radiated on these two parts along the direction that is parallel to the interface of face of weld usually.Described in the detailed description of preferred embodiment that provides below, shining this two parts with laser beam along the above-mentioned direction that is parallel to the interface of face of weld may difficulty, particularly because be used to produce the device of welding beam and be positioned at possible interference between near the beam generation device any other device (such as the device that is used for fixing and rotates the assembly of this hollow cylindrical member and packaged unit).And if the radially inside or outwards skew from the radial position at the interface of face of weld of the position of laser beam, the bonding strength of these two parts at the face of weld place may take place undesirably to change so.On the contrary, laser beam has been eliminated the above-mentioned problem that generally runs into along the method for the present invention that the direction that intersects with face of weld is radiated on the face of weld.
(2) according to a kind of method of above-mentioned form (1), pack into the openend of this hollow cylindrical member of this packaged unit, thus the inner peripheral surface of the outer circumference surface of packaged unit and hollow cylindrical member intermeshes, as face of weld.
(3) according to a kind of method of above-mentioned form (1), this hollow cylindrical member comprises a major diameter part, this major diameter partly has the internal diameter greater than other parts, this major diameter partly is positioned at openend one side of this hollow cylindrical member, and this packaged unit comprises a large-diameter plates part and a minor diameter annular protruding portion, this packaged unit is packed in the openend of this hollow cylindrical member, make the large-diameter plates outer circumference surface partly of packaged unit mesh the inner peripheral surface of the major diameter part of hollow cylindrical member, and make the inner peripheral surface of other parts of outer circumference surface engagement hollow cylindrical member of minor diameter annular protruding portion of packaged unit, the outer circumference surface of the inner peripheral surface of the major diameter part of this hollow cylindrical member and the large-diameter plates part of packaged unit is as face of weld.
In the method for above-mentioned form according to the present invention (3), the inner peripheral surface of the major diameter of hollow cylindrical member part can be taper, or as described cylindrical with respect to following form (4).The outer circumference surface of the large-diameter plates part of packaged unit is made the shape of the structure of the major diameter part inner peripheral surface that mates hollow cylindrical member.When the outer circumference surface of the large-diameter plates part of the inner peripheral surface of the major diameter of hollow cylindrical parts part and packaged unit was taper, pack into the openend of hollow cylindrical member of packaged unit made that the inside and outside periphery of taper is adjacent to each other and fixing.When the hollow cylindrical parts comprise a convex shoulder that forms between its major diameter part and other parts, and packaged unit comprise one between large-diameter plates part and minor diameter annular section, form convex shoulder the time, pack into the openend of hollow cylindrical member of packaged unit makes that these convex shoulders are adjacent to each other and fixing.As selection, pack into the openend of hollow cylindrical member of packaged unit makes the convex shoulder of packaged unit in abutting connection with the annular end face of hollow cylindrical member and fix.
(4) according to a kind of method of above-mentioned form (3), the outer circumference surface of the inner peripheral surface of the major diameter part of hollow cylindrical member and the large-diameter plates part of packaged unit has constant diameter.
(5) according to a kind of method of above-mentioned form (4), this hollow cylindrical member comprises a convex shoulder that forms between major diameter part and other parts, and packaged unit comprises a convex shoulder that forms between large-diameter plates part and minor diameter annular protruding portion, when pack into the openend of hollow cylindrical member of packaged unit, when making the convex shoulder of the convex shoulder of hollow cylindrical member and packaged unit keep adjacent to each other, the outer circumference surface of the inner peripheral surface of the major diameter part of this hollow cylindrical member and the large-diameter plates part of packaged unit is welded together by the welding beam.
In said method, the convex shoulder by hollow cylindrical member and the convex shoulder of packaged unit abut and contact, make the easier mutual axial location of these two parts, packaged unit is packed into high accuracy in the openend of hollow cylindrical member, so these two parts can high accuracy weld together.In packaged unit is packed the openend of hollow cylindrical member into, and when determining the piston end surface of compression chamber away from an end face of minor diameter annular protruding portion as part in the both ends of the surface of the major diameter of packaged unit part, the pressure that acts on the Compressed Gas on the piston end surface in the running of compressor is received by convex shoulder adjacent to each other, so improved the mechanical strength of the hollo head end wall of made piston.
(6) according to a kind of method of one of above-mentioned form (4)-(5), welding beam edge is radiated on the face of weld perpendicular to the direction of the center line of hollow cylindrical member.
Though the welding beam can be radiated on the face of weld along the crossing direction of the center line of the angle except that 90 ° and hollow cylindrical member, preferable is to weld the beam edge to be radiated on the face of weld perpendicular to the direction of the center line of hollow cylindrical member.In this case, welding spot size (distance at the interface between depth of fusion or the penetration face of weld) along the measurement of incidence direction of electron beam can reduce, wherein welding spot size is to guarantee that the high weld strength between these two parts is needed, in this respect, should be noted that the welding spot size that makes progress from the viewpoint footpath of weld strength is important.
(7) according to a kind of method of above-mentioned form (1), this packaged unit comprises large-diameter plates part, a minor diameter annular protruding portion, convex shoulder with between formation, and this packaged unit is packed in the openend of hollow cylindrical member, make the convex shoulder of packaged unit in abutting connection with the end face in openend one side of hollow cylindrical member, the convex shoulder of packaged unit and the end face of hollow cylindrical member are as face of weld.
When in the both ends of the surface of the major diameter of packaged unit part away from an end face of minor diameter annular protruding portion when partly determining the piston end surface of compression chamber, the pressure that acts on the Compressed Gas on the piston end surface in the running of compressor is received by the annular end face of the convex shoulder of packaged unit adjacent to each other and hollow cylindrical member, and the hollo head that causes piston determines that in its part the end wall place of compression chamber improved mechanical strength.
By reading the detailed description about the preferred embodiment of the present invention below in conjunction with accompanying drawing, above-mentioned and other purposes, feature, advantage and technology of the present invention and industrial significance will better be understood and estimate, wherein:
Fig. 1 is the cross sectional elevation of a swash-plate-type compressor, and this compressor is equipped with a piston, and this piston has the hollo head of making by method of the present invention;
Fig. 2 is the cross sectional elevation of piston shown in Fig. 1;
Fig. 3 is the partial cross section's front view that illustrates before a blank that is used for the piston of shop drawings 2 is fixed to blank at closure member the body part;
Fig. 4 is that the hollo head that this body part is shown divides the cross sectional elevation that forms the hollo head of piston with this closure member engagement;
Fig. 5 illustrates the cross section partial elevation view of method that forms the hollo head of piston according to one embodiment of the invention by welding;
Fig. 6 is the cross section partial elevation view that illustrates by the commonsense method of welding the hollo head that forms piston;
Fig. 7 is the cross section partial elevation view that the method for the hollo head that passes through welding formation piston according to another embodiment of the present invention is shown;
Fig. 8 is the cross section partial elevation view that the method for the hollo head that passes through welding formation piston according to still another embodiment of the invention is shown;
Fig. 9 illustrates the cross section partial elevation view of an also embodiment according to the present invention by the method for the hollo head of welding formation piston;
Figure 10 illustrates the cross section partial elevation view by the method for the hollo head of welding formation piston according to an embodiment more of the present invention;
Figure 11 is the view that another embodiment is shown.
At first with reference to Fig. 1 and 2, describe the piston that is used for swash-plate-type compressor, this piston constitutes according to one embodiment of the invention.Fig. 1 shows and contains one group of single head pison swash-plate-type compressor of (being called for short " piston " hereinafter).
In Fig. 1, reference marker 10 expressions one have one group of cylinder block along the casing bore 12 of its axis direction extension, make casing bore 12 arrange along a circle, on the center line that is centered close to this cylinder block of circle.Being designated as 14 piston reciprocally is contained in each casing bore.On one of axial opposed end face of cylinder block 10, (left side as shown in Figure 1, this will be called " front end face ") installs a procapsid 16.On the other end, (right side as shown in Figure 1, this will be called " rear end face ") passed a valve plate 20 back casing 18 is installed.This procapsid 16, back casing 18 and cylinder block 10 match and constitute the housing unit of swash-plate-type compressor body.Back casing 18 and valve plate 20 match and have determined a suction chamber 22 and a discharge chamber 24, and they are connected in a cooling circuit (not shown) by an inlet 26 and one outlet 28 respectively.Valve plate 20 has suction inlet 32, inlet valve 34, outlet 36 and dump valve 38.
One rotating driveshaft 50 is positioned at cylinder block 10 and procapsid 16, makes the pivot center of driving shaft 50 align with the center line of cylinder block 10.Driving shaft 50 in its opposite end respectively by procapsid 16 and cylinder block 10 through separately bearings.Cylinder block 10 has the centre bearing hole 56 that the heart therein partly forms, and bearing is positioned at this centre bearing hole, is used for part supporting driving shaft 50 in its back-end.The core that the fore-end of driving shaft 50 passes procapsid 16 extends, and makes the front end of driving shaft 50 be positioned at the outside of procapsid 16, drives the power source (not shown) so that driving shaft 50 is connected in.Rotating driveshaft 50 drives a wobbler 60, makes wobbler 60 to move axially and can tilt with respect to driving shaft 50.Wobbler 60 is installed on the driving shaft 50, thereby driving shaft 50 is passed in the center mounting hole 61 that the core of wobbler 60 forms.The diameter of the center mounting hole 61 of wobbler 60 increases gradually along the axial opposed direction from its axial mid portion towards the axial opposed two ends.On driving shaft 50, fix rotatable parts 62, these rotatable parts are by a thrust bearing 66 and procapsid 16 engagements.In the rotation process of driving shaft 50, wobbler 60 rotates with driving shaft 50 by a linkage.Axial and the tilting action of linkage 64 guiding wobblers 60.This linkage 64 comprise a pair of be fixed on support arm 67 on the rotatable parts 62, form on the wobbler 60 and can with the bullport 68 that forms on the support arm 67 slide directing pin 69, the center mounting hole 61 of wobbler 60 and the outer circumference surface of driving shaft 50 of engagement.
Above-mentioned piston 14 comprises that one forms and be assemblied in the interior heads 72 of corresponding casing bore 12 with the neck 70 of wobbler 60 engagement and with neck 70 is whole.Form a groove 74 on the neck 70, wobbler 60 meshes with this groove 74 by a pair of hemispherical slide block 76.Hemispherical slide block 76 remains in the groove 74, makes slide block 76 mesh neck 70 slidably on its semispherical surface, and makes slide block 76 mesh the radially outer of the opposed surface of wobbler 60 slidably on its flat surfaces.To describe the structure of piston 14 now in detail.
The rotational action of wobbler 60 converts the reciprocating linear motion of piston 14 to by slide block 76.When piston 14 when the dead point moves to its bottom dead centre from it, the cold gas in the suction chamber 22 suck compression chambers 79 by suction inlet 32 and inlet valve 34.When piston 14 when its bottom dead centre moves to its top dead-centre, just, when piston 14 was in compression stroke, the cold gas in the compression chamber 79 was pressurized.The cold gas of pressurization is discharged to by outlet 36 and dump valve 38 and discharges in the chamber 24.Because the compression of cold gas in the compression chamber 79, a reaction force in axial direction acts on the piston 14.This compression reaction force is born by procapsid 16 by piston 14, wobbler 60, rotatable parts 62 and thrust bearing 66.
Rotating driveshaft 50 has the path 10 of emitting 0.This emit path 10 0 at one of its two ends towards centre bearing hole 56 openings, and at the other end towards crankshaft room's 86 openings.Centre bearing hole 56 is communicated with suction chamber 22 by a communications ports 104 in its bottom.
As mentioned above by the solenoid-operated control valve 90 of control, crankshaft room 86 connects discharge chamber 24 selectively and disconnects discharge chamber 24, thereby the pressure in the control crankshaft room 86, so that regulate wobbler 60 with respect to angle of inclination, control the discharge capacity of compressor by this perpendicular to the direction of the pivot center of rotating driveshaft 50.Therefore, swash-plate-type compressor of the present invention is a variable capacity type.Describe more accurately and be, when solenoid 92 energisings of solenoid-operated control valve 90, suction passage 80 sealings, thus the cold gas of discharging the pressurization of chamber does not enter crankshaft room 86.In this case, the cold gas in the crankshaft room 86 makes that the pressure in the crankshaft room 86 reduce, thereby increases the inclination angle of wobbler 60 through emitting path 10 0 and communications ports 104 inflow suction chambers 22.The reciprocal stroke of pistons reciprocating 14 is along with the angle of inclination of wobbler 60 increases owing to the rotation of wobbler 60, thereby increased the volume-variation amount of compression chamber 79, and the discharge capacity of compressor increases by this.When solenoid 92 outages, suction passage 80 is opened, and makes the cold gas of pressurization enter crankshaft room 86 from discharging chamber 24, causes the pressure in the crankshaft room 86 to increase, and the angle of inclination of wobbler 60 reduces, thus corresponding the reducing of discharge capacity of compressor.The solenoid 92 of this solenoid-operated control valve 90 is controlled by a control device unshowned, that depend on the load that acts on the air-conditioning system that contains compressor of the present invention.This control device mainly is made of a computer.
The structure of piston 14 will be described below.
The end of the neck 70 of piston 14, it has a U-shaped cross section, as shown in Figure 2 away from head 72.Two opposing sidewalls of the U-shaped of this end have groove relative to each other 110 separately.Each groove 110 is determined by the part spherical inside surface of this sidewall.Above-mentioned this contacts its apparent surface to slide block 76 at the radially outer of wobbler 60, and is accommodated in separately the part ball recess 110.Therefore, neck 70 is by slide block 76 wobbler 60 that slidably mates.In this embodiment, neck 70 constitutes the mate of the driver part of an engagement wobbler 60 forms.
The head 72 and neck 70 integral body of piston 14 are made, and comprise that a cylindrical body part 114 and is fixed to the packaged unit 116 on this body part 114.This cylindrical body part 114 is at its end opening away from neck 70, and seals at the other end.The openend of packaged unit 116 enclosed body parts 114.The hollow cylindrical of body part 114 partly has an inner peripheral surface 120, this inner peripheral surface is divided into two parts, promptly, in the major diameter part 122 of openend one side of body part 114 with away from the small diameter portion 124 of openend, these two parts are worked in coordination and the convex shoulder 126 having determined to form between them.
Packaged unit 116 is generally disc-shaped part, comprises that a circular slab part 130 and is from the extension of one of the both ends of the surface of this plate portion 130 and the diameter annular protruding portion 132 less than plate portion 130.This circular slab part 130 can be called the major diameter part, and annular protruding portion 132 can be called small diameter portion.Between this circular slab part 130 and annular protruding portion 132, form a convex shoulder 134.The annular protruding portion 132 of packaged unit 116 has a circular trough 136 away from the end face opening of circular slab part 130 at packaged unit 116, as shown in Figure 2, makes the weight of packaged unit 116 reduce.Packaged unit 116 is packed in the inner peripheral surface 120 of hollow cylindrical part of body part 114, makes the convex shoulder 134 of packaged unit 116 in abutting connection with the convex shoulder 126 of the hollow cylindrical part of body part 114.In this case, the major diameter part 122 of the inner peripheral surface 120 of the outer circumference surface engagement body part 114 of the circular slab part 130 of packaged unit 116, and the small diameter portion 124 of the inner peripheral surface 120 of the outer circumference surface of the annular protruding portion 132 of packaged unit 116 engagement body part 114.Packaged unit 116 is fixed by welding on the body part 114.The compression reaction force that in the compression stroke of piston 14, acts on piston 14 end faces owing to the compression of the cold gas in the compression chamber 79 by convex shoulder adjacent to each other 126 with 134 and the circumferential surface that contacts of body part 114 and packaged unit 116 receive, wherein these surfaces are by being welded to connect.
Two pistons 14 of above-mentioned structure are to make from a blank as shown in Figure 3.The blank 150 that is used to make two pistons 14 has a body part 152 and two packaged units 154.Body part 152 comprises paired neck 156 and two cylinder type hollow head part made from paired neck 156 integral body 158, makes this two hollo head divide 158 to extend from the two ends of paired neck 156 along opposite direction.Paired neck 156 is made up of mutual integrally formed two parts of the neck 70 of corresponding two single head pisons 14.Two hollo heads divide each end in these paired neck 156 1 sides in its two ends in 158 to seal, and a hollow cylindrical part at other end opening are arranged, the hollow o cylindrical body part 114 of its corresponding head 72.
As shown in Figure 3, hollo head divides 158 an inner peripheral surface is arranged, and this inner peripheral surface is divided into two parts, and, is positioned at the small diameter portion 164 that hollo head divides the major diameter part 162 of 158 openend one side and is positioned at paired neck 156 1 sides that is.Convex shoulder 166 forms between major diameter part 162 and small diameter portion 164.This convex shoulder 166 is as the convex shoulder 126 of piston 14.Body part 152 is made by die casting by the metal material of aluminium alloy form.Make the step that body part 152 is preparation body parts 152 by die casting.Two bridge shape parts of reference marker 168 indications among Fig. 3, they are for the rigidity that increases body part 152 provides, and as a reinforcing section, can protect body part 152 to avoid because the distortion that heat causes by this reinforcing section.
Two packaged units 154 structurally are identical.As packaged unit 116, these packaged units 154 all comprise the annular protruding portion 176 that a circular slab part 174 and is extended from one of opposing end surface of this circular slab part 174.Between this circular slab part 174 and annular protruding portion 176, form a convex shoulder 177.The circular slab part 174 of packaged unit 154 has a circular trough 178.The convex shoulder 177 of packaged unit 154 and groove 178 are as the convex shoulder 134 and the groove 136 of packaged unit 116.
The circular slab part 174 of each packaged unit 154 forms a retaining part 182 at it on away from the end face of annular protruding portion 176.This retaining part 182 has circular cross section, and a centre bore 182 is arranged.In this embodiment, packaged unit 154 is made by die casting by the metal material of aluminium alloy form.Make the step that packaged unit 154 is preparation packaged units 154 by die casting.The circular slab part 174 of packaged unit 154 and annular protruding portion 176 have the size relationship same with the circular slab part 130 of packaged unit 116 and annular protruding portion 132, and omit the detailed description to them.
As shown in Figure 4, packaged unit 154 hollo head of packing into divides 158 openend, make the circular slab part 174 engagement hollo heads of packaged unit 154 divide 158 major diameter part 162, and the annular protruding portion 176 engagement hollo heads of packaged unit 154 divide 158 small diameter portion 164.Packaged unit 154 insert hollo heads divide 158 up to convex shoulder 177 in abutting connection with convex shoulder 166.Along with each packaged unit 154 body part 152 of packing into, hollo head divide the outer circumference surface of the circular slab part 174 of the inner peripheral surface of 158 major diameter part 162 and packaged unit 154 keep near or adjacent to each other so that these inside and outside circle side faces are connected to each other by electron beam welding.To describe this welding procedure in detail below.In this embodiment, because body part 152 and each packaged unit 154 are all made by die casting, and has very high dimensional accuracy, body part 152 does not need machining operations such as cutting and grinding so packaged unit 154 is packed into, and the feasible manufacturing cost that is used for the blank 150 of single head pison 14 reduces.
After two packaged units 154 are as mentioned above fixedly packed the respective openings end of body part 152 into, divide at the hollo head of body part 152 on the outer circumference surface that exposes (Fig. 9) of 158 outer circumference surface and packaged unit 154 and carry out machining.This machining realizes on lathe or lathe, and blank 150 is fixed at retaining part 180 places of packaged unit 154 by chuck, two center of blank 150 and engagement centre bore 182 wherein, and blank 150 is rotated by appropriate driving device.Because packaged unit 154 is fixed by welding on the body part 152, rotate relative to each other so prevented packaged unit 154 and body part 152, thereby but the blank unitary rotation be convenient to effectively process at its outer circumference surface.
Then, the hollo head of body part 152 divides 158 and the suitable material of the outer circumference surface of packaged unit 154 coating one deck, such as one deck polytetrafluoroethylene (PTFE).Then, blank 150 is through machinings, from packaged unit 154 excision retaining parts 180, and hollo head divide 158 and the outer circumference surface of the coating of packaged unit 154 do not have the center grinding, made two parts of the head 72 that becomes two pistons 14.In next step, near two bridge shape parts 168 of paired neck 156, carry out cutting processing, form the groove 110 of the slide block 76 that holds piston 14.Like this, two parts of the neck 70 that becomes two-piston 14 have been formed at these paired neck 156 places.At last, this paired neck 156 partly carries out cutting processing in its axial centre, blank 150 is cut to two of formation two pistons 14 separately.
To describe now each packaged unit 154 will be welded to technology on the body part 152.
Intermeshing as mentioned above packaged unit 154 and body part 152 are shone by the electron beam launcher electrons emitted bundle of an electron beam welding equipment, make hollo head divide the outer circumference surface of the circular slab part 174 of the major diameter part 162 of 158 inner peripheral surface and packaged unit 154 to be connected to each other, thereby the surface of these connections form an interface by welding.The hollo head that two parts 152,154 weld together divide 158 and the inside and outside periphery of circular slab part 174 be called " face of weld " hereinafter.Describe in detail with reference to Fig. 4, two packaged units 154 of the body part 152 and the body part 152 of packing into are fixed and are clipped between a pair of anchor clamps 186, make each packaged unit 154 be pressed on the body part 152 by each anchor clamps, wherein the retaining part 180 of packaged unit 154 is packed in the hole that forms on the anchor clamps 186.In this case, apply a moment of torsion for each packaged unit 154 by appropriate driving device through anchor clamps 186, thereby body part 152 and packaged unit 154 rotate together.In this case, electron beam is radiated on body part 152 and the packaged unit 154, and these parts are welded together at above-mentioned face of weld place.By anchor clamps 186 packaged unit 154 is pressed in and has prevented on the body part 152 that packaged unit 154 from moving away from body part 152, make and effectively to weld these parts.Be welded under the vacuum in this embodiment or be effective under the pressure that reduces, thereby the air of having avoided causing owing to heat expands, eliminated be closed parts 154 the needs of hermetic closed body part 152 internal ventilation, and needs that a passage is provided to piston.
The drive unit and the electron beam launcher that are used to rotate body part 152 and packaged unit 154 are being known in the art, and it describes omission in detail.In this embodiment, pack into bright spot that the rotation of blank wherein makes electron beam of packaged unit 154 moves along the circumferencial direction of blank 150.As selection, the bright spot of electron beam launcher or electron beam can rotate, and the blank maintenance is static.
As shown in Figure 5, the electron beam of launching from electron beam launcher is radiated on the blank 150 along straight line, this straight line tilts with respect to the center line of the body part 152 of single-point line expression, so, distance between the center line of above-mentioned straight line and body part 152 divides 158 in the radial direction at hollo head, along with this straight line along being parallel to the centerline direction of body part 152 and 164 direction reduces near convex shoulder surface 166 from major diameter part 162 to small diameter portion.Here it is, straight line and face of weld that electron beam is radiated on the interface of face of weld intersect, thereby along with incident ray divide along hollo head 158 axial direction from major diameter part 162 to small diameter portion 164 near the interface, incident ray hollo head divide 158 in the radial direction inwardly near the interface.In other words, electron beam is radiated on the blank 150 along the arrow straight line of inclination extension shown in Figure 5.If electron beam is radiated on the blank 150 along the direction that is parallel to the interface that contacts periphery, as in prior art shown in Figure 6, the fusing amount of the material of body part 152 and packaged unit 154 can be uniformly for these two parts so, as long as electron beam divides 158 accurately align with interface (162) in the radial direction at hollo head.Yet, if the bright spot of electron beam divides 158 the inside or outwards skew of radial direction along hollo head, the fusing amount of the material of body part 152 and packaged unit 154 may be uneven for these two parts so, reduced welding region, be the zone that these parts 152,154 are welded together, cause the weld strength between body part 152 and the packaged unit 154 to reduce.If the bright spot of welding beam divides the outwards skew slightly of 158 radial direction from the interface along hollo head, shown in the upward arrow straight line among Fig. 6, for example, the fusing amount of the material of body part 152 is greater than packaged unit 154, and the welding region that welds together of these parts reduces so.So in the welding method of prior art, the weld strength between body part 152 and the packaged unit 154 depends on single blank and undesirably changes.On the contrary, in the embodiment of Fig. 5, welding region does not have big variation, even divide 158 radial direction outwards to be offset as the bright spot of Fig. 6 electron beam from the interface along hollo head, so can prevent the variation of the weld strength of single blank 150 according to the method for Fig. 5.
In the common welding method shown in Fig. 6, electron beam is radiated on the face of weld along the direction that is parallel to their interface, face of weld needs electron beam to be radiated on end face one side of formation retaining part 180 of each packaged unit 154, so the incident direction of electron beam is parallel to the center line (representing with the single-point line) of body part 152 in Fig. 6.In this scheme, because electron beam launcher is inevitably near anchor clamps 186 location, so may produce interference between electron beam launcher and anchor clamps 186.On the contrary, according to the solution of the present invention, electron beam is radiated on the face of weld along the straight line that the pivot center with respect to anchor clamps shown in Figure 5 186 tilts, and can avoid the interference between anchor clamps 186 and the electron beam launcher easily.
In this embodiment, each hollo head of body part 152 divides 158 to be equivalent to match with packaged unit 154 and to form the hollow cylindrical member of the head 72 of piston 14, and it is a hollo head.Major diameter part 162 is divided 158 major diameter part as each hollo head.Circular slab part 174 is as the major diameter part of each packaged unit 154, and annular protruding portion 176 is as the small diameter portion of each packaged unit 154.
Electron beam is radiated on the face of weld along any direction that intersects with face of weld.For example, electron beam can be radiated on the face of weld along a straight line that tilts with respect to the center line of body part 152 (representing with the single-point line) as shown in Figure 7, so, distance between the center line of above-mentioned straight line and body part 152 divides 158 in the radial direction at hollo head, along with this straight line along being parallel to the centerline direction of body part 152 and the direction from small diameter portion 164 to major diameter part 162 reduces near the end face of circular slab part 174.Here it is, incident straight line and face of weld that electron beam is radiated on the interface of face of weld intersect, thereby along with incident ray divide along hollo head 158 axial direction from small diameter portion 164 to major diameter part 162 near the interface, incident ray hollo head divide 158 in the radial direction inwardly near the interface.In other words, electron beam is radiated on the blank 150 along the arrow straight line of inclination extension shown in Figure 7.This scheme has also prevented the interference between electron beam launcher and the anchor clamps 186 effectively.
As selection, electron beam can be radiated on the face of weld, along the direction perpendicular to face of weld as shown in Figure 8.This scheme is for preventing that the interference between electron beam launcher and the anchor clamps 186 is especially effective.In this embodiment, the welding spot size of measuring along the direction of illumination of electron beam (distance at the interface between depth of fusion or the penetration face of weld), this is that to obtain required weld strength between body part 152 and packaged unit 154 necessary, can do to such an extent that be radiated at Fig. 5 on the face of weld and the situation among 7 the embodiment less than electron beam along the direction that tilts with respect to center line.In this respect, the size that should be noted that from the viewpoint of weld strength solder joint radially is important.
In the embodiment of Fig. 5 and 7-8, face of weld is parallel to the center line of body part 152.Face of weld needn't be parallel to the center line of body part 152, but can extend along other directions, and as shown in Figures 9 and 10, wherein used same reference numbers is come the mark corresponding components among use and Fig. 5 and the 7-8, and omits its detailed description.
With reference to Fig. 9, the hollo head of body part 152 divides 200 end sealings at its two ends, and at other end opening.Packaged unit 154 is packed in the hole 202 of body part 152, make convex shoulder 177 in abutting connection with the annular end face 204 of body part 152, the hollo head of body part 152 divides the counterpart of 200 inner peripheral surface so the annular protruding portion 176 of packaged unit 154 is packed at its outer circumference surface place.The head 200 of the body part 152 of this scheme is textural simple, and constant little wall thickness is arranged.In this embodiment, the convex shoulder 177 of the annular end face 204 of head 200 and packaged unit 154 is by being welded together.And the corresponding axial end portion of the outer circumference surface of the annular protruding portion 176 of the axial end portion of the inner peripheral surface of head 200 and packaged unit 154 is also by being welded together.Shown in the arrow straight line among Fig. 9, electron beam is radiated on the face of weld along the straight line that the center line with respect to body part 152 tilts, so, distance between the center line of above-mentioned straight line and body part 152 divides 200 in the radial direction at hollo head, along with this straight line along being parallel to centerline direction and 154 direction reduces near end face 204 or convex shoulder 177 from hollo head 200 to packaged unit.Here it is, straight line and face of weld that electron beam is radiated on the interface of face of weld 177,204 intersect, thereby along with incident ray along divide from hollo head 200 to the axial direction of packaged unit 154 near the interface, incident ray hollo head divide 200 in the radial direction inwardly near the interface.As selection, electron beam can be radiated on the face of weld to the straight line that extends along the lower left as the embodiment of Fig. 5.Should be pointed out that only the end face 204 of head 200 and the convex shoulder 177 of packaged unit 154 are welded together.In this case, face of weld is perpendicular to the center line of body part 152.
Embodiment shown in Fig. 9 is especially effective for avoiding the interference between electron beam launcher and the anchor clamps 186, and can realize connecting effectively between the convex shoulder 177 of the end face 204 of the head 200 that extends perpendicular to the direction of the center line of body part 152 and packaged unit 154.In this embodiment, circular slab part 174 is as the major diameter part of packaged unit 154, and annular protruding portion 176 is as the small diameter portion of packaged unit 154.
With reference to Figure 10, body part 152 has a hollo head 300, and its annular end face 304 is taper, and its internal diameter inwardly constantly reduces in the axial direction, and a packaged unit 310 is packed in the hole 302 of head 300.This packaged unit 310 has circular slab part 174, and its outer circumference surface 312 is taper, and its external diameter inwardly constantly reduces as mentioned above in the axial direction.The conical surface 312 of the conical surface 304 of head 300 and the plate portion 174 of packaged unit 154 is by being welded together.In this embodiment, electron beam is radiated at direction on the face of weld 304,312 perpendicular to the center line of body part 152, and intersects with the face of weld 304 and 312 of these tapers.If the incident direction of electron beam is as the interface of parallel in commonsense method and taper face of weld, the piston that is obtained is determined that in its part the end face periphery of compression chamber 79 has undesirably been melted by electron beam so.In this case, the minimum volume of compression chamber 79 when piston is positioned at the end of compression stroke has undesirably increased owing to melt the distortion that causes, and causes the operational efficiency of compressor to reduce.Among the embodiment shown in Figure 10, the incident direction of electron beam and taper face of weld 304,312 intersect has avoided the problems referred to above effectively.In this scheme, face of weld is shone by electron beam, and does not suffer the interference between electron beam launcher and the anchor clamps 186.As mentioned above, electron beam can be radiated on the face of weld 304,312 along any direction that intersects with face of weld.Even therefore as the embodiment of Figure 10 when face of weld during with respect to the center line inclination of body part 152, weld and also can carry out at an easy rate.The conical surface 304 of head 300 is as the inner peripheral surface of the major diameter part of hollow cylindrical member, this hollow cylindrical member formation piston that matches with a packaged unit.
In order to enjoy advantage of the present invention, wish to weld beam and spend greater than 10 with respect to the angle of inclination of face of weld, recommendable is greater than 20 degree, is more preferably greater than 30 degree.
In the embodiment shown in Fig. 4,5,7,8,9,10, packaged unit 154,310 is fixed in the hollow cylindrical part 158,200,300, makes pack into the openend of hollo head of packaged unit.As shown in figure 11, this packaged unit can be contained on the hollow cylindrical part.In the embodiment of Figure 11, a hollo head divides 400 an annular protruding portion 402 in its openend formation is arranged.This annular protruding portion 402 has an external diameter less than other parts, so form a convex shoulder 404 between this annular protruding portion 402 and other parts.Packaged unit 154 is contained on the outer circumference surface of annular protruding portion 402 of hollo head 400, makes the annular end face 352 of an annular protruding portion 350 in abutting connection with the convex shoulder 404 of hollo head 400.In this embodiment, the convex shoulder 404 of the annular end face 352 of the annular protruding portion 350 of packaged unit 154 and hollo head 400 is by being welded together.
In blank shown in Figure 3 150, two cylinder type hollow head part 158 all with paired neck 156 whole formation, and away from an end opening of paired neck 156, and each hollo head divides 158 opening to be sealed by the packaged unit of separately making 154 in its two ends.Blank 150 can be other structure.For example, two packaged units and a paired neck member are made by die casting integral body, and each packaged unit is connected in two separately in the hollow cylindrical member of die casting on corresponding one by welding, thereby seal the openend of this hollow cylindrical member.
Packaged unit and hollow cylindrical member can be made by forging.
Piston in described embodiment can be used for volum-controlled type swash-plate-type compressor and variable capacity type swash-plate-type compressor.And this piston can be a double end.
Though just to illustrative purposes, some preferred embodiment of the present invention described above, but should be understood that the present invention can have various changes and modifications, such as described in the present invention general introduction those, this may expect those those skilled in the art.
Claims (7)
1. piston that is formed for swash-plate-type compressor, (14) hollo head, (72) method, comprise step: with a packaged unit, (154,310) be fixed to one at least in the hollow cylindrical member of the end opening at two ends, (158,200,300) on, thereby seal the openend of described hollow cylindrical member, and the face of weld of giving described packaged unit and described hollow cylindrical member applies a welding beam, the contiguous mutually or contact of this face of weld, thereby described packaged unit and described hollow cylindrical member are connected to each other at described face of weld place
It is characterized in that described welding beam edge is radiated on the described face of weld of described packaged unit and described hollow cylindrical member with the direction that described face of weld intersects.
2. a kind of method according to claim 1, it is characterized in that described packaged unit (154) the described hollow cylindrical member (158 of packing into, 300) described openend, thereby the inner peripheral surface of the outer circumference surface of described packaged unit and described hollow cylindrical member intermeshes, as described face of weld.
3. a kind of method according to claim 1, it is characterized in that described hollow cylindrical member (158,300) comprise major diameter part (162,304), this major diameter partly has greater than other parts (164,302) internal diameter, described major diameter partly is positioned at described openend one side of described hollow cylindrical member, and described packaged unit (154) comprises large-diameter plates part (174) and a minor diameter annular protruding portion (176), described packaged unit is packed in the described openend of described hollow cylindrical member, make the described large-diameter plates outer circumference surface partly of described packaged unit mesh the inner peripheral surface of the described major diameter part of described hollow cylindrical member, and make the outer circumference surface of described minor diameter annular protruding portion of described packaged unit mesh the inner peripheral surface of described other parts of described hollow cylindrical member, the described outer circumference surface of the described inner peripheral surface of the described major diameter part of described hollow cylindrical member and the described large-diameter plates part of described packaged unit is as described face of weld.
4. a kind of method according to claim 3 is characterized in that the described outer circumference surface of the described large-diameter plates part (174) of the described inner peripheral surface of described major diameter part (162) of described hollow cylindrical member (158) and described packaged unit (154) has constant diameter.
5. a kind of method according to claim 4, it is characterized in that described hollow cylindrical member (158) comprises a convex shoulder (166) that forms between described major diameter part (162) and described other parts (164), and described packaged unit (154) comprises a convex shoulder (177) that forms between described large-diameter plates part (174) and described minor diameter annular protruding portion (176), when pack into the described openend of described hollow cylindrical member of described packaged unit, when making the described convex shoulder (177) of the described convex shoulder (166) of described hollow cylindrical member and described packaged unit keep adjacent to each other, the described outer circumference surface of the described inner peripheral surface of the described major diameter part of described hollow cylindrical member and the described large-diameter plates part of described packaged unit is welded together by the welding beam.
6. a kind of method according to claim 4 is characterized in that welding beam and is radiated on the described face of weld along the direction perpendicular to the center line of described hollow cylindrical member.
7. a kind of method according to claim 1, it is characterized in that described packaged unit (154) comprises large-diameter plates part (174), one minor diameter annular protruding portion (176), convex shoulder (177) with between formation, and described packaged unit is packed in the described openend (202) of described hollow cylindrical member (200), make the described convex shoulder and the described hollow cylindrical member of described packaged unit keep adjacency at the end face (204) of described openend one side, the described convex shoulder of described packaged unit and the described end face of described hollow cylindrical member are as described face of weld.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01111932 CN1371778A (en) | 2001-02-24 | 2001-02-24 | Method for forming piston hollo head of rotary inlined disc type compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01111932 CN1371778A (en) | 2001-02-24 | 2001-02-24 | Method for forming piston hollo head of rotary inlined disc type compressor |
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| Publication Number | Publication Date |
|---|---|
| CN1371778A true CN1371778A (en) | 2002-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01111932 Pending CN1371778A (en) | 2001-02-24 | 2001-02-24 | Method for forming piston hollo head of rotary inlined disc type compressor |
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| CN (1) | CN1371778A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329660C (en) * | 2003-08-08 | 2007-08-01 | 桐乡市易锋机械厂 | Formation method for piston hollow head of compressor |
| CN102091914A (en) * | 2010-12-10 | 2011-06-15 | 孙效 | Processing technology of two intersected cylinders |
-
2001
- 2001-02-24 CN CN 01111932 patent/CN1371778A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329660C (en) * | 2003-08-08 | 2007-08-01 | 桐乡市易锋机械厂 | Formation method for piston hollow head of compressor |
| CN102091914A (en) * | 2010-12-10 | 2011-06-15 | 孙效 | Processing technology of two intersected cylinders |
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