CN105736745B - Thermal expansion valve manufacturing method - Google Patents

Thermal expansion valve manufacturing method Download PDF

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Publication number
CN105736745B
CN105736745B CN201410740909.0A CN201410740909A CN105736745B CN 105736745 B CN105736745 B CN 105736745B CN 201410740909 A CN201410740909 A CN 201410740909A CN 105736745 B CN105736745 B CN 105736745B
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China
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valve body
interconnecting piece
valve
throughput
blank
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CN105736745A (en
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尹斌
裘浩明
陈振文
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Zhejiang Sanhua Automotive Components Co Ltd
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Zhejiang Sanhua Automotive Components Co Ltd
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Abstract

The present invention provides a kind of manufacturing method of heating power expansion valve, forms valve body blank by cutting aluminium bar material or aluminium alloy bar in the method, then carries out forging and stamping and aperture to valve body blank and form the valve body of heating power expansion valve.Since valve body blank is formed using forging and stamping mode, required complicated shape directly can be all forged and pressed out in all directions of valve body blank, the valve body profile of heating power expansion valve can be made more accurate, and can have smaller volume and weight.

Description

Thermal expansion valve manufacturing method
[technical field]
The present invention relates to throttling control field more particularly to a kind of manufacturing methods of heating power expansion valve.
[background technique]
Heating power expansion valve (Thermostatic Expansion Valve, TXV) is that air-conditioning and refrigeration equipment generally use Throttle part, it can be throttled and be depressured to the liquid refrigerant for carrying out condenser, and according to the temperature of evaporator outlet It spends to adjust the flow for the refrigerant for being sent into evaporator from condenser, to adapt to the continually changing needs of cooling load.Heating power is swollen The General Principle that swollen valve controls refrigerant flow is: the temperature of evaporator outlet is sensed by air tank head, in air tank head The temperature that is sensed according to air tank head of medium generate the thermal expansion of degree of correspondence, by thermally expanding to the valve being connect with air tank head Bar generates pressure, and valve rod pushes spool mobile under the driving of the pressure, to adjust the aperture of valve opening, reaches adjusting refrigerant The effect of flow.
The mental section such as aluminum profile of strip is usually used as raw material in existing thermal expansion valve manufacturing method, It is cut along the direction vertical with the length direction of the profile, using the metal block cut as valve body blank, then Processing, which is portalled, on valve body blank is and forms the valve body of heating power expansion valve, then air tank head, valve rod, valve heating power expansion valve In the component assemblies to valve body such as core, regulating mechanism.But at least two opposite sides on the valve body blank cut down in this way Face (two sections formed when cutting in valve body blank two sides) is biggish plane, is easy in this way so that valve body is formed outside The more straight overall structure of contouring, volume and weight is all bigger, to increase the manufacturing cost of heating power expansion valve.And And it may also be desirable to that processing is further processed to planar section biggish on valve body blank in practical manufacturing process, with The more complicated shape for having more use value is formed, this necessarily makes the manufacturing process of heating power expansion valve more cumbersome.
Therefore, it is necessary to be improved to existing technology, to solve the above technical problem.
[summary of the invention]
The purpose of the present invention is to provide a kind of heating power expansion valves that the operation is more convenient and is conducive to Improving The Quality of Products Manufacturing method.
To achieve the above object, the present invention adopts the following technical scheme: a kind of manufacturing method of heating power expansion valve, the heat Power expansion valve includes valve body, air tank head, valve rod and spool, which is characterized in that is made a reservation for method includes the following steps: interception has One section of aluminium alloy bar of length；Mold is provided, the mold includes upper mold and lower die, and the upper mold offers upper impression, institute It states lower die and offers lower impressions；The bar is forged and pressed in the mold, utilizes the upper impression and mo(u)ld bottom half of the mold The main part of the bar is formed a part of exterior contour by chamber, another part exterior contour and institute corresponding with the upper impression State the corresponding valve body blank of lower impressions；Drilling processing is carried out to the valve body blank, is manufactured into the valve body of heating power expansion valve, Wherein the valve body includes air tank head mounting portion, reflux portion, valve body interconnecting piece, flow control division and the pedestal in integral structure Portion；The valve body interconnecting piece includes interconnecting piece main body, and the side in the reflux portion, the company is arranged in the air tank head mounting portion The other side backwards to the air tank head mounting portion in the reflux portion is arranged in socket part main body, and the flow control division includes first The side backwards to the reflux portion of the interconnecting piece main body is arranged in throughput and the second throughput, first throughput, The side backwards to the interconnecting piece main body of first throughput is arranged in the base portion, and second throughput is from described It extends out in base portion or partly from the base portion；Wherein the valve body is in first throughput and second The valve opening for fluid circulation is offered between logical portion；The spool is mounted on the valve inner, makes spool alignment institute State valve opening；The valve rod is passed through into the reflux portion and the valve body interconnecting piece, one end of the valve rod is made to be directed at the spool； The air tank head and the air tank head mounting portion is relatively fixed, the air tank head is supported or be fixed in one end of the valve rod On.
This method is further comprising the steps of: before forging and pressing to the bar intercepted, carrying out surface to it Processing, the surface treatment include deburring and cleaning；After being surface-treated to the bar, to the bar Isothermal holding is carried out, the temperature of the isothermal holding is 400 DEG C -480 DEG C, and the time is 1.5-4 hours.
This method is further comprising the steps of: before carrying out drilling processing to the valve body blank, to the valve body blank It is heat-treated；Valve body blank Jing Guo the heat treatment is surface-treated, it is described surface treatment include grinding, polishing, At least one of pickling.
The heat treatment includes: to quench to the valve body blank, and the temperature of quenching is 530 DEG C -560 DEG C, and the time is 2-4 hours；Ageing treatment is carried out to the valve body blank by quenching, the holding temperature of ageing treatment is 170 DEG C -200 DEG C, Time is 5-8 hours.
The interior shape of the upper impression and the air tank head mounting portion, reflux portion, valve body interconnecting piece, flow control division and The shape of the same side of base portion mutually coincide or substantially mutually coincide, and the interior shape of the lower impressions is with described in one The air tank head mounting portion of structure, reflux portion, valve body interconnecting piece, flow control division and base portion the shape of the other side mutually coincide Or it substantially mutually coincide.
The shape in the air tank head mounting portion and the reflux portion substantially pacify by circular ring shape or cylindrical shape, the air tank head The partial region of the one end in dress portion and reflux portion side is connected, the top and the reflux portion of the interconnecting piece main body The part of the surface of the other side backwards to the air tank head mounting portion be connected；First throughput and the second throughput Shape is substantially cylindrical, and the bottom of the partial region of the side of first throughput and the interconnecting piece main body is linked to be one Body；The base portion it is generally cylindrical in shape, one end and first throughput backwards to the interconnecting piece main body The partial region of side is connected；A part of one end of second throughput and a part of first throughput one end are even Integrally, the another part at the end of second throughput is connected with a part of the outer peripheral surface of the base portion； Or the end of second throughput is connected with a part of the outer peripheral surface of the base portion；The reflux portion, first The axial direction of throughput and the second throughput is parallel to each other or is substantially parallel to each other, and with the air tank head mounting portion and base portion It is axially vertical or substantially vertical.
The interconnecting piece main body includes two opposite sides being connected between the top and bottom of the interconnecting piece main body Portion and two opposite end faces；The axial direction that the distance between two end faces of the interconnecting piece main body are less than the reflux portion is long Degree, and with the diameter of the base portion is roughly equal or diameter less than the base portion；The surface in the reflux portion and The surface of first throughput, which is all formed with, is respectively relative to described two side surfaces protrusions, is generally shaped like semicolumn The convex surface in face；The valve body interconnecting piece further includes first limited to the heating power expansion valve for cooperating with installation part Department of assembly；The radial direction section for being generally shaped like the semicylinder for being provided with through-hole or the first department of assembly of first department of assembly Face is generally shaped like C-shaped or V-arrangement；First department of assembly is convexly equipped at least one described side of the interconnecting piece main body On, and the axial direction of first department of assembly and the reflux portion, the first throughput and the second throughput axial parallel or substantially In parallel；The valve body interconnecting piece further includes assembling for cooperating with installation part to the heating power expansion valve is limited second Portion；The outer shape of second department of assembly is substantially cylindrical, outwardly protrudes from the side of the valve body, it is axial with it is described The axial direction in reflux portion is parallel or substantially parallel, and second department of assembly is provided with the screw connection structure of non through hole.
The method also includes following steps: when by the mold clamping, staying between the upper mold and the lower die The gap that width is 1.3-1.7 millimeters out；It is forged and pressed in the mold by the bar, utilizes the mo(u)ld top half of the mold It is corresponding with the upper impression that the main part of the bar is formed a part of exterior contour by chamber and lower impressions, outside another part While profile corresponding with lower impressions valve body blank, the redundance of the bar is made to be squeezed into the gap and forge and press At the overlap for being connected to the valve body blank periphery；Before carrying out drilling processing to the valve body blank, the overlap is cut off.
The valve body includes reflux portion, generally cylindrical in shape, the axial length with the valve body in the reflux portion Degree direction is vertical or substantially vertical, and the outer diameter and inner diameter at the both ends in the reflux portion expands, respectively in the reflux portion Both ends form first pipe interconnecting piece and second pipe interconnecting piece；The both ends of the upper impression are formed with wide diameter portion, under described The both ends of type chamber are formed with lower wide diameter portion, and the axial length of the upper wide diameter portion and the lower wide diameter portion connects than the first pipe The axial length of socket part or the second pipe interconnecting piece is 1-2 millimeters long；The method also includes following steps: on will be described When mould and lower die mold, the upper wide diameter portion and the lower wide diameter portion is set to be combined to form interconnecting piece forging and stamping chamber, by the bar A part forges into the blank and the second pipe interconnecting piece of the first pipe interconnecting piece in interconnecting piece forging and stamping chamber Blank；The end of the blank of blank and second pipe interconnecting piece to the first pipe interconnecting piece carries out Milling Process, makes The first pipe interconnecting piece blank and second pipe interconnecting piece blank length and the first pipe interconnecting piece and The length of second pipe interconnecting piece is consistent.
It is described that drilling processing is carried out to the valve body blank, it is manufactured into the valve body with valve opening of heating power expansion valve Step includes following sub-step: providing profiling jig, the profiling jig includes fixing piece and movable part, the portion of the fixing piece A part of exterior contour pair with the valve body blank is formed with by the means that wire cutting and/or electric pulse are processed on point surface The first clamping face answered, is formed by the means that wire cutting and/or electric pulse are processed in the part of the surface of the movable part and institute State corresponding second clamping face of another part exterior contour of valve body blank；The valve body blank is placed on first clamping Between face and the second clamping face, drives the movable part towards described fixing piece one end, pressed from both sides using first clamping face and second The face of holding clamps and fixes the valve body blank；It is drilled out on the valve body blank axial perpendicular with the length direction of the valve body Aperture；The axial and valve body consistent aperture of length direction is drilled out on the valve body blank.
Compared with prior art, thermal expansion valve manufacturing method provided by the invention is by cutting aluminium bar material or aluminium alloy Bar forms valve body blank, then carries out forging and stamping and aperture to valve body blank and form the valve body of heating power expansion valve.Due to valve body hair Base is formed using forging and stamping mode, therefore required complicated shape directly can be all forged and pressed out in all directions of valve body blank, Without forming biggish plane in valve body blank two sides as the existing method by cutting profile formation valve body blank. Compared with prior art, the operation is more convenient for method of the invention, according to the valve for the heating power expansion valve that method of the invention manufactures Body profile is more accurate, and can have smaller volume and weight.
[Detailed description of the invention]
Fig. 1 is the heating power expansion valve manufactured according to an embodiment of thermal expansion valve manufacturing method provided by the invention Stereoscopic schematic diagram；
Fig. 2 is the internal structure schematic cross-sectional view of heating power expansion valve embodiment shown in FIG. 1；
Fig. 3 is the exploded view of heating power expansion valve embodiment shown in FIG. 1.
Fig. 4 is to manufacture heating power expansion valve according to an embodiment of thermal expansion valve manufacturing method provided by the invention When, schematic diagram of the valve body of heating power expansion valve under each process segment.
Fig. 5 is the schematic diagram for the mold that an embodiment of thermal expansion valve manufacturing method provided by the invention uses.
Fig. 6 is the partial cutaway view schematic of mold shown in fig. 5.
Schematic cross-sectional view when Fig. 7 is mold clamping shown in fig. 5.
Fig. 8 is to forge and press aluminium alloy bar according to an embodiment of thermal expansion valve manufacturing method provided by the invention At the schematic diagram of valve body blank.
Fig. 9 is schematic diagram of the Fig. 7 under another visual angle.
Figure 10 is showing for the profiling jig that an embodiment of thermal expansion valve manufacturing method provided by the invention uses It is intended to.
Figure 11 is the schematic diagram using profiling jig clamping valve blank shown in Fig. 10.
[specific embodiment]
The present invention will be further explained below with reference to the attached drawings and specific examples.
The present invention provides a kind of manufacturing method of heating power expansion valve, forms valve by cutting aluminium bar material or aluminium alloy bar Chaeta base, then forging and stamping and aperture are carried out to valve body blank and form the valve body of heating power expansion valve.It is manufactured according to method of the invention Heating power expansion valve valve body profile it is more accurate, and can have smaller volume and weight.It below will be to according to this hair The feature of heating power expansion valve product and the specific steps of this method of the thermal expansion valve manufacturing method manufacture of bright offer are done in detail Introduction.
Fig. 1 to it is shown in Fig. 3 be made according to an embodiment of thermal expansion valve manufacturing method provided by the invention The heating power expansion valve 100 made comprising valve body 10, air tank head 20, valve rod 30, spool 40 and regulating mechanism 50.The thermal expansion Valve 100 is suitable for carrying out throttling control to multiple fluid, in the present embodiment in order to describe more intuitive, only with by the heat Power expansion valve 100 is for be described in detail for throttling control to refrigerant in automotive air-conditioning system；But ability Field technique personnel obviously should be understood that the type of fluid that throttling control can be carried out by the heating power expansion valve 100 is not limited to Refrigerant.
Specific introduction will be done to specific structure, assembly method and the application method of above-mentioned each element below.In order to just In description, the end that valve body 10 shown in figure is in top shown in figure is called top from here on, in figure The end of shown lower section is known as bottom end；The part that top is closer in valve body 10 is known as top, is closer to the part of bottom end Referred to as lower part, the part between top and lower part are known as middle part.When describing the geometrical relationship between certain components, may relate to And the saying of " substantially vertical " and " substantially parallel ".Hereinafter, " substantially vertical " and " substantially parallel " between component refers to It is, although substantially not accurate vertical and parallel relationship between component, if not by accurate measurement, position The case where relationship intuitively is being difficult to distinguish with accurately vertical and parallel, such as angular deviation is not more than 1 degree.
Valve body 10 is processed by cutting, forging and stamping and aperture by aluminum alloy materials such as bar and is formed, including is integrally formed Air tank head mounting portion 11, reflux portion 12, valve body interconnecting piece 13, flow control division 14 and base portion 15.It need to be noted that It is that valve body 10 is integrally formed by the aluminum alloy materials of monolith and is made, therefore the various pieces of valve body 10 are all connected , wherein fitted together again with other parts after being a separately formed there is no any part.Below for valve body 10 Detailed construction introduce in, sometimes for statement intuitive and text it is succinct, valve body 10 certain may be described with " connection " Relationship between a little parts refers to there is part area between the different piece of valve body 10 when still " connection " is used in these occasions Domain is mutually connected from beginning to end, is not meant between certain parts of valve body 10 originally independently of each other, using it He fits together connection means.
Air tank head mounting portion 11 is formed in 10 top of valve body, is generally shaped like cylinder, the axial length with valve body 10 Direction (i.e. Z-direction shown in Fig. 1) is consistent.The center of the air tank head mounting portion 11 axially offers cylindrical first Mounting hole 111, first mounting hole 111 top (the namely top of valve body 10) open at one end in air tank head mounting portion 11, The other end runs through entire air tank head mounting portion 11, and extends in the reflux portion 12 connecting with air tank head mounting portion 11.This first The internal partial wall internal diameter close to 10 top of valve body of mounting hole 111 expands and is formed the first seal groove 112 of annular.Corresponding to this The bottom of first mounting groove 112 is formed with annular step surface 113 inside air tank head mounting portion 11, the outer part of the step surface 113 The recess (i.e. close to the part of 11 inner wall of air tank head mounting portion) is divided down and form the second annular seal groove 114.That is, Second seal groove 114 is provided with the bottom of the first seal groove 112, collectively forms cross section substantially L with the first seal groove 112 The compound seal slot of shape.
The generally hollow cylindrical shape in reflux portion 12, is arranged axially along Y direction shown in Fig. 1, with valve body 10 Length direction it is vertical or substantially vertical, center axially offers cylindrical return flow line 121；The two of the reflux portion 12 Side convexes to form the convex surface of substantially semi-cylindrical respectively, and the protrusion direction on two convex surfaces is X-axis side shown in Fig. 1 respectively To positively and negatively, the axial direction on two convex surfaces is then parallel with Y direction shown in Fig. 1.Air tank head mounting portion 11 Bottom end (i.e. the one end of air tank head mounting portion 11 towards 10 bottom end of valve body) on 12 outer surface of reflux portion towards 10 top of valve body The partial region of side be connected.The second cylindrical mounting hole is also offered to perforation on the side wall in the reflux portion 12 122, the internal diameter of the internal diameter of second mounting hole 122 less than the first mounting hole 111, and the first mounting hole 111 and the second mounting hole 122 are coaxially mutually aligned, the top (i.e. towards the one end on 10 top of valve body) of the second mounting hole 122 and the first mounting hole 111 The one end for protruding into reflux portion 12 is interconnected, the bottom end (i.e. towards one end of 10 bottom end of valve body) of the second mounting hole 122 and reflux Channel 121 is connected to.The both ends bore of return flow line 121 expands, and is respectively formed the first pipe for connecting fluid conveyance conduit The shape of interconnecting piece 123 and second pipe interconnecting piece 124, the first pipe interconnecting piece 123 and second pipe interconnecting piece 124 is big Cause flare.It is also opened up on the inner wall of the other side opposite with the side for being connected with air tank head mounting portion 11 in reflux portion 12 There is cylindrical third mounting hole 125, the internal diameter of the third mounting hole 125 and the second mounting hole 122 are equal or roughly equal, and It is coaxially mutually aligned across return flow line 121 and the second mounting hole 122.
Valve body interconnecting piece 13 includes interconnecting piece main body 131, which includes the top towards 10 top of valve body Portion, bottom and connection two sides and two end faces between the top and the bottom towards 10 bottom end of valve body, two sides Face and two end faces are plane or generally planar, wherein be parallel to each other between a side or substantially parallel, two end faces it Between be parallel to each other or substantially parallel, either side and either end facet are then mutually perpendicular to or generally perpendicularly intersect.
The top of the interconnecting piece main body 131 and the side for offering third mounting hole 125 in reflux portion 12 are (i.e. backwards to gas tank The side of head mounting portion 11) be connected, the length in reflux portion 12 be greater than between two end faces of interconnecting piece main body 131 away from From, therefore the both ends in reflux portion 12 are crossed two end faces of valve body interconnecting piece 13 respectively and are stretched out；And the diameter in reflux portion 12 is big In the distance between two sides of interconnecting piece main body 131 so that reflux portion, the above-mentioned convex surface that convexes to form, 12 two sides relative to Two sides of interconnecting piece main body 131 are protrusions.The of protrusion is formed at least one side of the interconnecting piece main body 131 One department of assembly 132, the shape of first department of assembly 132 are semicylinder or substantially semicylinder, axial with reflux portion 12 Axial direction it is parallel or substantially parallel (i.e. parallel or substantially parallel with Y direction shown in FIG. 1).As shown in Figure 1, the first department of assembly 132 two end faces are respectively (being in the same plane) concordant with two end faces of interconnecting piece main body 131, that is to say, that the The axial length of one department of assembly 132 is equal with the distance between two end faces of interconnecting piece main body 131, be it is shown in FIG. 1 away from From L2.Distance L2 is less than the axial length L 1 in reflux portion 12.It, can be by mould in this way when being opened to manufacture the valve body 10 The shape of tool is designed more regular, simplifies manufacturing process.The central part of first department of assembly 132, which axially offers, penetrates through it The first pilot hole 132a at both ends.The second department of assembly 133 of protrusion is formed on one end face of interconnecting piece main body 131, this The shape of two departments of assembly 133 be it is cylindrical or substantially cylindrical, it is axial also with reflux portion 12 it is axial it is parallel (i.e. and Fig. 1 Shown in Y direction it is parallel), one end is vertically connected on the end face of interconnecting piece main body 131, and the other end is to the outside of valve body 10 It stretches out.The central part of second department of assembly 133 axially offers the second pilot hole 133a, which is opening In 133 end of the second department of assembly and the screw connection structure of the blind hole being internally threaded or other non through hole.First dress Distribution 132a and the second pilot hole 133a can be used for the cooperation of the installation parts such as bolt corresponding with shape, rivet, carry out to valve body 10 Limit, by the valve body 10 be fixedly fitted in automotive air-conditioning system or other use environments in.
The inside of interconnecting piece main body 131 is also provided with the 4th mounting hole 134, the upper boom set gradually from its top to bottom Hole 135 and lower rod aperture 136.4th mounting hole 134, upper rod aperture 135 and lower rod aperture 136 are cylindrical hole, wherein the 4th The internal diameter of mounting hole 134 is less than the internal diameter of third mounting hole 125, the top of valve body interconnecting piece 13 is opened on, with third mounting hole 125 are coaxially connected to；The internal diameter of upper rod aperture 135 less than the 4th mounting hole 134 internal diameter, and coaxially with the 4th mounting hole 134 Connection；The internal diameter of lower rod aperture 136 is less than the internal diameter of upper rod aperture 135, is coaxially connected to upper rod aperture 135, and is opened on valve body company The bottom of socket part 13.
Flow control division 14 includes the first throughput 141 and the second throughput 142, first throughput 141 and second The shape in logical portion 142 is substantially cylindrical, and their axial direction it is parallel or substantially parallel with the axial direction in reflux portion 12 (i.e. with Y direction shown in FIG. 1 is parallel or substantially parallel).First throughput 141 towards 10 top of valve body side partial region and The bottom of valve body interconnecting piece 13 is connected, the end face of 141 one end of the first throughput and an endface of valve body interconnecting piece 131 In in same plane, and a part of end of the partial region of the end face of first throughput 141 and 142 one end of the second throughput Face is connected, the other end of the first throughput 141 then cross another end face of valve body interconnecting piece 131 and to 10 outside of valve body It stretches out.The two sides of first throughput 141 and the two sides of the second throughput 142 all convex to form the convex surface close to semi-cylindrical, should The protrusion direction on two convex surfaces that the first throughput 141 is formed be respectively X-direction shown in Fig. 1 positively and negatively, the Two throughputs 142 formed two convex surfaces protrusion direction be also respectively X-direction shown in Fig. 1 positively and negatively, and The axial direction on the convex surface that the first throughput 141 and the second throughput 142 are formed is parallel with Y direction shown in Fig. 1.It is first-class The diameter in logical portion 141 is greater than the distance between two sides of interconnecting piece main body 131, so that 141 two sides of the first throughput are raised The above-mentioned convex surface formed is protrusion relative to two sides of interconnecting piece main body 131.First is offered in first throughput 141 Recirculation hole 143, first recirculation hole 143 are the axially extending stepped hole along the first throughput 141 comprising the first exit orifice Hole portion 143b is cylindrical hole and coaxially in hole portion 143b in portion 143a and first, the first outer hole portion 143a and first It is interconnected, the internal diameter of the first outer hole portion 143a is greater than the internal diameter of hole portion 143b in first.Wherein, hole portion 143b setting in first Inside the first throughput 141, lower rod aperture 136 from 13 internal stretch of valve body interconnecting piece into the first throughput 141, and with first The side on interior hole portion 143b towards 10 top of valve body is connected to.First outer hole portion 143a setting in first on the outside of hole portion 143b, One end is coaxially connected to hole portion 143b in first, and the other end is in the first throughput 141 on the one end stretched out on the outside of valve body 10 Form opening.In the present embodiment, which is formed by the diameter of the opening relative to first exit orifice The diameter further expansion of the other parts of portion 143a, formed substantially flare, for connecting fluid conveyance conduit the Three pipe connection portion 143c.
In present embodiment, 123 end of end face and first pipe interconnecting piece of the end third pipe connection portion 143c End face is in the same plane, that is to say, that the end face of described 121 one end of reflux portion and 141 end of the first throughput End face is concordant (being in the same plane).In this way when being opened to manufacture the valve body 10, the shape of mold can be set It counts more regular, simplifies manufacturing process.First throughput 141 is also provided with the valve opening 145 for adjusting fluid flow.It should Valve opening 145 is cylindrical hole, is interconnected with the other side towards 10 bottom end of valve body of the hole portion 143b in first, and with Lower rod aperture 136 hole portion 143b in first is coaxially mutually aligned.
As described above, the portion end surface (portion end surface being located above in figure) and first of 142 one end of the second throughput The partial region of one end face of throughput 141 is connected, and the other end of the second throughput 142 is then to prolonging on the outside of valve body 10 It stretches, the extending direction of extending direction and the first throughput 141 is on the contrary, i.e. the first throughput 141 and the second throughput 142 difference It extends out from the opposite sides of valve body 10.The second recirculation hole 144 is offered in second throughput 142, second recirculation hole 144 For along the axially extending stepped hole of the second throughput 142 comprising hole portion 144b in the second outer hole portion 144a and second, it should Hole portion 144b is cylindrical hole and is coaxially interconnected in second outer hole portion 144a and second, the second outer hole portion 144a's Internal diameter is greater than the internal diameter of hole portion 144b in second.Wherein, hole portion 144b is arranged inside the second throughput 142 in second, and second Outer hole portion 144a setting is in second on the outside of hole portion 144b, and one end is coaxially connected to hole portion 144b in second, and the other end exists Second throughput 142 forms opening on the one end stretched out on the outside of valve body 10.In the present embodiment, the second outer hole portion 144a It is formed by the diameter further expansion of the diameter of the opening relative to the other parts of the second outer hole portion 144a, is formed substantially Flare, the 4th pipe connection portion 144c for connecting fluid conveyance conduit.In present embodiment, the 4th pipeline connects The end face position of 133 end of end face and the second department of assembly of 124 end of end face and second pipe interconnecting piece of the end socket part 144c In in same plane, that is to say, that the end face of the end face of described 121 one end of reflux portion and 142 end of the second throughput and The end face of second department of assembly, 133 end is concordant (being in the same plane).It is opened in this way to manufacture the valve body 10 When mould, the shape of mold can be designed to more regular, simplify manufacturing process.
Base portion 15 is generally cylindrical, it is axial it is consistent with the length direction of valve body 10 (i.e. with Z axis shown in Fig. 1 Direction is consistent), top (i.e. towards the one end on 10 top of valve body) is with the first throughput 141 backwards to the one of interconnecting piece main body 131 The partial region of side (i.e. towards the side of 10 bottom end of valve body) is connected, and the second throughput 142 connects with the first throughput 141 The partial region of the side of another part end face (being underlying portion end surface in figure) and the base portion 15 of the one end connect It is connected；The bottom end of base portion 15 is exactly the bottom end of valve body 10.Valve chamber 151 is offered in base portion 15, which is vertical To the cylindrical step hole of setting, axial, cylindrical hole including multiple coaxial communications consistent with the length direction of valve body 10 Section.Along the direction from the top of valve body 10 to the bottom end of valve body 10, the diameter of each hole section is incremented by successively, bottom , that is, the maximum hole section of diameter is formed in 151 bottom end of base portion and is open.The top of valve chamber 151 is (i.e. towards 10 top of valve body One end) it extends in the first throughput 141, and be coaxially connected to valve opening 145.Hole portion in the second of second recirculation hole 144 144b is then extended in the base portion 15, and is connected to the side of valve chamber 151.
The above is only the contour structures of the valve body of the heating power expansion valve of an embodiment of the invention, and there is no right Concrete shape, size and the structural relation of all parts of the valve body of heating power expansion valve of the invention limit.At it In his embodiment, air tank head mounting portion 11, reflux portion 12, valve body interconnecting piece 13, the first throughput 141, the second throughput 142 And concrete shape, size and the structural relation of base portion 15 may all have certain variation.For example, in present embodiment The first pipe interconnecting piece 123 and second pipe interconnecting piece 124 formed at the both ends open of return flow line 121 is to be mutually aligned Both, but may also not be mutually aligned both in other embodiments and be arranged to other positions relationship, such as Towards the angle that can be mutually perpendicular to or be formed other angles, and the concrete shape in reflux portion 12 can also make adaptation therewith The change of property.Similarly, the first throughput 141 is axial and the second throughput 142 it is axial other than being parallel to each other, can also be with It is arranged to other positions relationship, such as is mutually perpendicular to or is formed the angle of other angles.Second throughput 142 is in the longitudinal direction Position can be more nearly the bottom end of valve body 10, and one end can be fully connected on the outer peripheral surface of base portion 15 (the i.e. end Whole end faces are all connected with the partial region of the outer peripheral surface of base portion 15), and it is completely wrong with the end of the first throughput 141 It opens, i.e., the end of the second throughput 142 is not necessarily intended to directly be connected with the end of the first throughput 141, but makes second Throughput 142 fully rather than partly extend out from base portion 15.First department of assembly 132 can also be not formed in connection On one end face of portion's main body 131, and it is formed on the end face of first-class 141 one end of logical portion.Base portion in present embodiment Two of the distance between two end faces of 15 diameter and interconnecting piece main body 131 (i.e. above-mentioned L2) and the first department of assembly 132 (i.e. above-mentioned L2) is roughly equal for the distance between end face, and in other embodiments, the diameter of base portion 15 can also be big Between the distance between two end faces of interconnecting piece main body 131 (i.e. above-mentioned L2) and two end faces of the first department of assembly 132 Distance (i.e. above-mentioned L2).
Air tank head 20 includes main part 21 and socket part 22, wherein most of feature of main part 21 and existing air tank head Pressure-actuated diaphragm that is similar, being internally provided with thermal expansion medium and generated when can be by thermal expansion media expansion.Main part 21 shell protrudes to form socket part 22, the socket part 22 be cylindrical shape, outer peripheral wall be smooth cylindrical surface, and internal diameter with The internal diameter of first mounting hole 111 is corresponding, can be inserted in the first mounting hole 111, and consolidates in the way of such as being threadedly coupled It is scheduled in the first mounting hole 111.Main part 21 is connected to by the first mounting hole 111 with return flow line 121.The air tank head 20 is used for The temperature of the evaporator outlet of automotive air-conditioning system is sensed, medium therein can generate degree of correspondence according to the temperature sensed Thermal expansion, drive its diaphragm mobile by thermal expansion, to the generation pressure of valve rod 30 connect with air tank head 20, make valve rod at this It pushes spool 40 mobile under the driving of pressure, to adjust the aperture of valve opening 145, achievees the effect that adjusting refrigerant flow rate.
Valve rod 30 includes upper drive rod 31 and underdrive bar 33.Support or be fixed on air tank head 20 in one end of upper drive rod 31 Main part 21 bottom, shaft passes through socket part 22, the first mounting hole 111, return flow line 121, the second mounting hole 122 and the Three mounting holes 125, the other end then protrude into rod aperture 135.The diameter of underdrive bar 33 is not more than the internal diameter of lower rod aperture 136, can It is axially movably set in lower rod aperture 136, one end that one end protrudes into upper rod aperture 135 with upper drive rod 31 is coaxially mutually supported Hold, the other end along with first in the axially vertical direction of hole portion 143b pass through hole portion 143b in first, and protrude into valve opening 145 In.
Spool 40 is in the present embodiment steel ball, is placed in valve chamber 151 and is aligned valve opening 145, underdrive bar 53 It protrudes into one end alignment spool 70 of valve opening 145 and supports on spool 70.The shape and size and valve opening 145 of spool 40 are opposite It answers, the aperture of adjustable valve opening 145 when being moved axially relative to valve opening 145.
Regulating mechanism 50 includes adjustment seat 51, the first spring 52, valve core frame 53 and second spring 54.Adjustment seat 51 is substantially With the round table-like of stairstepping outer peripheral surface, closest to 10 bottom end of valve body and the maximum a part of outer peripheral surface of diameter and valve Room 151 close to 10 bottom end of valve body and the maximum a part of inner wall of internal diameter cooperated using the mode such as being threadedly coupled It is fixed, make adjustment seat 51 fixedly and height is adjustably assemblied on valve body 10.51 center of adjustment seat is offered adjusts for accommodating Save the spring eye 51a of spring 52.First spring 52 is cylindrical helical spring, is placed between adjustment seat 51 and spool 40 and diameter It is limited in spring eye 51a, can be flexibly stretched along longitudinal direction to ground.Valve core frame 53 is generally cylindrical, and is placed in the first spring Between 52 and spool 40, one end coaxially covers in the first spring 52, and the other end stretched out from 52 top of the first spring and in week It encloses to form the flange that a loop diameter is greater than 52 internal diameter of the first spring, prevents valve core frame 53 from falling into inside the first spring 52.Second bullet Spring 54 is butterfly spring, and top is fixed on 53 periphery of valve core frame, and the alar part at edge is supported on 151 inner wall of valve chamber, and being used for will The position of valve core frame 53 is maintained at the center of valve chamber 151, prevents valve core frame 53 from shifting.Spool 40 is clamped in valve core frame 53 The one end and underdrive bar 33 stretched out from 52 top of the first spring are protruded between one end of valve opening 145.Jie in air tank head 20 When matter does not generate the thermal expansion of sufficient degree, the elastic force of the first spring 52 can drive valve core frame 53, spool 40 and valve rod 30 all It is moved upward, makes spool 40 closer to valve opening 145, reduce the orifice size of valve opening 145, pass through valve opening 145 to reduce Refrigerant flow.
In addition, the heating power expansion valve 100 further includes reflux portion sealing ring 91, tabletting 92, upper rod aperture sealing ring 93 and valve chamber Sealing ring 94.Reflux portion sealing ring 91 is using elastic material O-ring as made of rubber, and section is generally L-shaped, and above-mentioned The shape and size for the compound seal slot that first seal groove 112 and the second seal groove 114 are constituted are corresponding.The reflux portion sealing ring 91 in the compound seal slot, while being set on the external circumferential surface of insertion section 22 of the first mounting hole 111 of insertion, is inserting Enter and form interference fit between the outer surface in portion 22 and the inner surface of air tank head mounting portion 11, air tank head 20 can be subject into one The fixation of step, and prevent the refrigerant in return flow line 121 from leaking out from the first mounting hole 111.Tabletting 92 is using gold Belong to the thin rounded flakes that are made of such as copper of material, diameter is corresponding to 125 diameter of third mounting hole, central then offer diameter and be not less than The through-hole (unlabeled in figure) of upper 31 diameter of drive rod.The tabletting 92 is fixed in third mounting hole 125, and upper drive rod 31 is from pressure It is passed through in the through-hole that 92 center of piece opens up.Upper rod aperture sealing ring 93 is also to use elastic material O-ring as made of rubber, not In the case where deforming, outer diameter of rod aperture sealing ring 93 is slightly larger than the diameter of upper rod aperture 135 on this, and internal diameter is then slightly less than upload The diameter of lever 31.Rod aperture sealing ring 93 is placed in the 4th mounting hole 134 and is limited by tabletting 92 on this, and rod aperture seals on this Circle 92 is fitted snugly on drive rod 31, and outer periphery is closely pressed on 134 inner wall of the 4th mounting hole, that is, is being uploaded Interference fit is formed between lever 31 and the inner wall of the 4th mounting hole 134, for preventing the refrigerant in valve chamber 151 from passing through lower beam Hole 136 and upper rod aperture 135 leak out.Valve chamber sealing ring 94 is also for using elastic material O-ring as made of rubber, set It is located on the lesser outer peripheral surface of a part of diameter of adjustment seat 51 (for example, it may be embedded in 51 outer peripheral surface of adjustment seat is provided with On annular groove in), and between adjustment seat 51 and the inner wall of valve chamber 151 formed interference fit, for preventing in valve chamber 151 Refrigerant leaked out from 10 bottom end of valve body.
In use, the second recirculation hole 144 of the heating power expansion valve 100 passes through the refrigeration of condenser output channel and condenser Agent outlet, the first recirculation hole 143 are connected to by evaporator input channel with the refrigerant inlet of evaporator.First pipe connects Socket part 123 is connected to by evaporator output tube road with the refrigerant inlet of evaporator, and second pipe interconnecting piece 124 passes through compressor Input channel is connected to the refrigerant outlet of compressor.The heating power expansion valve 100 at work, come the refrigerant of condenser from Second recirculation hole 144 is passed through valve chamber 151, if the position where spool 40 does not completely close valve opening 151 at this time, refrigerant Evaporator is transported to for freezing by valve opening 151 and the first recirculation hole 143.For freeze after the raised refrigerant of temperature from Be discharged in evaporator, by second pipe interconnecting piece 124, return flow line 121 and first pipe interconnecting piece 123 flow back to compressor with For being recycled.When the raised refrigerant of temperature after use flows through return flow line 121, it can also pass through 112 He of the second mounting hole First mounting hole 111 touches the main part 21 of air tank head 20.Main part 21 senses the temperature or temperature and pressure of refrigerant After the operating conditions such as power, medium therein generates corresponding thermal expansion according to the operating condition sensed, by thermally expanding to the upper of valve rod 30 Drive rod 31 generates pressure, and upper drive rod 31 pushes underdrive bar 33 and spool 40 to axially move under the driving of the pressure, To adjust the aperture of valve opening 145, the refrigerant flow for passing through valve opening 145 is further adjusted.It is appreciated that when the system of evaporator When cold effect is poor, the refrigerant temperature of reflux will be increased, and the degree of thermal expansion that air tank head 20 generates at this time will be larger, meeting 30 entirety of valve rod is pushed down on into bigger amplitude, by the top of spool 40 downwards and far from valve opening 145, to expand valve opening 145 Aperture, cause flow into evaporator refrigerant flow increase, enhance refrigeration effect.If the refrigeration effect of evaporator is very By force, the thermic load of air-conditioning system reduces, then the refrigerant temperature to flow back will reduce, so that the thermal expansion journey that air tank head 20 generates Degree becomes smaller, and the amplitude that valve rod 30 moves down reduces, and adjustment spring 52 can be sprung back at this time, and spool 40 is pushed up upwards again, is subtracted The aperture of small valve opening 145, the refrigerant flow for flowing into evaporator reduce.
Referring to Fig. 4, the thermal expansion valve manufacturing method provided by the invention that can be used for manufacturing above-mentioned heating power expansion valve 100 Embodiment includes each step as described below.
S1: blanking.Concrete operations mode is to select cylindrical aluminium bar material or aluminium alloy bar 10A as raw material, Lower length is intercepted from bar 10A slightly larger than one section of bar 10B of the predetermined length of the valve body 10 of heating power expansion valve 100, is used In being processed into valve body 10 as described above.
S2: this section of bar 10B intercepted is surface-treated.In present embodiment, the surface treatment operations packet It includes and deburring and cleaning is carried out to the surface of bar 10B.
S3: isothermal holding is carried out to surface treated bar 10B.In present embodiment, the isothermal holding it is specific Operational means is that bar 10B is made to remain certain under the holding temperature after bar 10B is heated to scheduled holding temperature Soaking time.The holding temperature of the isothermal holding is preferably 400 DEG C -480 DEG C, and soaking time is preferably 1.5-4 hours.
S4: the bar 10B by isothermal holding described in step S3 is forged and pressed using mold, bar 10B is manufactured At exterior contour valve body blank 10C corresponding with valve body 10.Specifically, step S4 includes each sub-step as described below Suddenly.
S41: being opened according to the specific exterior contour of above-mentioned valve body 10, forms the outer wheels of interior shape and valve body 10 Wide corresponding mold (it is appreciated that sub-step S41 can also be completed before the either step in above-mentioned steps S1-S3).
Fig. 5 to Fig. 9 is please referred to, mold used in present embodiment includes upper mold 200A, lower die 200B, upper die holder 201A, lower die holder 201B.The shape of upper mold 200A and lower die 200B substantially cuboid, in the lower surface of upper mold 200A Portion is recessed with upper impression 210A, and lower impressions 210B is recessed in the middle part of the upper surface of lower die 200B.Upper impression 210A and mo(u)ld bottom half The size and shape of chamber 210B is corresponded to each other with a part of above-mentioned valve body 10 respectively, for example, along Y-axis side shown in FIG. 1 In the case where observation valve body 10, upper impression 210A and lower impressions 210B be it is symmetrical, the interior shape of the two can divide It is not corresponded to each other with right half of and left one side of something of valve body 10.That is, the interior shape of upper impression 210A and air tank head are installed Portion 11, reflux portion 12, valve body interconnecting piece 13, flow control division 14 and base portion 15 the same side (such as can be X-axis in Fig. 1 The signified side of forward direction) shape mutually coincide or substantially mutually coincide, the interior shape and air tank head of lower impressions 210B Mounting portion 11, reflux portion 12, valve body interconnecting piece 13, flow control division 14 and base portion 15 the other side (such as can be in Fig. 1 The side of the negative sense meaning of X-axis) shape mutually coincide or substantially mutually coincide." identical " is meant that upper impression herein The size and shape of 210A or lower impressions 210B and the corresponding part on valve body 10 are completely the same, and " substantially mutually coincideing " is then Refer to that the size and shape of the overwhelming majority of upper impression 210A or lower impressions 210B are consistent with the corresponding part on valve body 10, But may be more slightly larger than the corresponding part on valve body 10 in certain parts, i.e., certain parts are stayed relative to the ideal dimensions of valve body 10 There is certain surplus.Content in relation to the surpluses such as this will hereinafter describe in detail.
Upper mould cave 203A is offered in the middle part of the lower surface of upper die holder 201A, shape is opposite with the outer shape of upper mold 200A It answers, upper mold 200A can be fixedly in upper mould cave 203A.The depth of upper mould cave 203A is slightly larger than the thickness of upper mold 200A, this The depth of upper mould cave 203A is 0.65-0.85 millimeters bigger than the thickness of upper mold 200A in embodiment, therefore upper mold 200A is complete After in full insertion upper mould cave 203A, upper mold 200A towards outside part of the surface (being lower surface in figure) relative to upper die holder The part of the surface (being lower surface in figure) in 201A towards outside is recessed and forms the groove 204A that depth is 0.65-0.85 millimeters. The upper surface middle part of lower die holder 201B offers lower die cavity 203B, and shape is corresponding with the outer shape of lower die 200B, lower die 200B can be fixedly in lower die cavity 203B.The depth of lower die cavity 203B is slightly larger than the thickness of lower die 200B, this embodiment party The depth of lower die cavity 203B is 0.65-0.85 millimeters bigger than the thickness of lower die 200B in formula, therefore is completely embedded by lower die 200B After in lower die cavity 203B, the part of the surface (being upper surface in figure) towards outside of lower die 200B is relative to lower die holder 201B's Part of the surface (being upper surface in figure) towards outside is recessed and forms the groove 204B that depth is 0.65-0.85 millimeters.Work as handle Upper mold 200A is completely embedded into and is fixed in upper mould cave 203A, and lower die 200B is completely embedded into and is fixed on it in lower die cavity 204B Afterwards, mold can be molded, i.e., be mutually aligned the upper surface of the lower surface of upper die holder 200A and lower die 200B and each other Fitting, upper impression 210A and lower impressions 210B can be mutually aligned and closer to each other at this time, to be formed for forging bar 10B It is pressed into the monolithic devices chamber of valve body blank 10C.Meanwhile above-mentioned groove 204A and groove 204B in the lower surface of upper mold 200A under Gap M2 (such as shown in Fig. 7, Fig. 8 and Fig. 9) is formed between the upper surface of mould 200B, it is clear that the width of gap M2 is 1.3- 1.7 millimeter.It is also convex on the lower surface of upper die holder 201A in order to ensure the accurate positioning between upper die holder 201A and lower die holder 201B Equipped with multiple positioning column 202A, location hole 202B corresponding with positioning column 202A is offered on the upper surface of lower die holder 201B.It is logical It crosses and positioning column 202A is inserted into location hole 202B the accurate positioning that may insure between upper die holder 201A and lower die holder 201B.
It should be noted that in order to obtain preferably forging and stamping effect, in the method that present embodiment provides, upper impression The size of 210A and lower impressions 210B might not have to be completely the same with the size of 10 corresponding part of valve body, but can be in spy Ideal dimensions after being made on fixed direction slightly larger than valve body 10, i.e., relative to the ideal dimensions of valve body 10, there are more than certain Amount.If referring to Fig. 8, the axial direction (Y direction shown in namely Fig. 1) in the reflux portion 12 of valve body 10 is defined as valve body 10 width direction, the axial length in reflux portion 12 are defined as the width of valve body 10, then in the width direction, upper impression 210A The width of valve body 10 can be slightly larger than with the width of lower impressions 210B.Specifically as shown in figure 5, the both ends diameter of upper impression 210A expands It is big and form upper wide diameter portion 230A, the both ends enlarged-diameter of lower impressions 210B and form lower wide diameter portion 230B.After mold clamping, Upper wide diameter portion 230A and lower wide diameter portion 230B can the mutual pairing in two two places and form interconnecting piece forging and stamping chamber, for forging and pressing out valve body The blank of 10 first pipe interconnecting piece 123 and the blank of second pipe interconnecting piece 124.But wide diameter portion 230A is under on this The axial length of wide diameter portion 230B is not necessarily required to the axis equal to first pipe interconnecting piece 123 and second pipe interconnecting piece 124 To length, but certain surplus M1 can be had more relative to the finished product of valve body 10, i.e., with first pipe interconnecting piece 123 and second Pipe connection portion 124 is compared, and the end on the outside of upper wide diameter portion 230A and lower wide diameter portion 230B can be provided with balance, One section that length is M1 can be had more in axial direction than first pipe interconnecting piece 123 and second pipe interconnecting piece 124.It is appreciated that Since the both ends of upper impression 210A are all formed with upper wide diameter portion 230A, the both ends of lower impressions 230B are all formed with lower wide diameter portion Width of the width of 230B, therefore in above-mentioned width direction, upper impression 230A and lower impressions 230B than the valve body 10 after being made The length of 2M1 is had more in total.In embodiment shown in Fig. 8, the length of M1 is 1-2 millimeters.Reserve the original of above-mentioned surplus M1 Cause, if be because the axial length of upper wide diameter portion 230A and lower wide diameter portion 230B is too short, it is more difficult in forging and stamping to ensure phase It answers the material of part that can be extruded in place and formation rule and complete shape, is easy the first pipe connection come out in forging and stamping The notch that the similar crackle of shape is formed on the inside of the blank of portion 123 and second pipe interconnecting piece 124, influences product yield.In setting Stating surplus M1 is exactly the axial length in order to suitably increase upper wide diameter portion 230A and lower wide diameter portion 230B, is allowed true when forging and pressing It protects the blank formation rule in the first pipe interconnecting piece 123 and second pipe interconnecting piece 124 that are wherein formed and completely makes a reservation for Shape.
S42: it in bar 10B after above-mentioned isothermal holding, puts it into the lower impressions 210B of the lower die 200B；It will Positioning column 202A is inserted into corresponding location hole 202B, makes upper die holder 201A and upper mold 200A and lower die holder 201B and lower die 200B Exactitude position disposably forges and presses bar 10B then by mold clamping.During forging and stamping, the main body of bar 10B Part is forged into exterior contour valve body blank 10C corresponding with valve body 10 in upper impression 201A and lower impressions 201B.Such as Fig. 7 And shown in Fig. 8, when bar 10B is forged into valve body blank 10C, limit of the redundance squeezed out to periphery by above-mentioned gap M2 System forms the overlap 10D being looped around around valve body blank 10C.According to above-mentioned preset clearance thickness, it is clear that overlap 10D's With a thickness of 1.3-1.7 millimeters.This thickness can effectively buffer the impact force between upper mold 200A and lower die 200B, be conducive to Extend the service life of mold, while will not lead to that the thickness of overlap 10D is excessive and waste material and influence forging and stamping effect.
S5: the overlap 10D on valve body blank 10C is cut off.
S6: after the operation of above-mentioned excision overlap 10D, valve body blank 10C is heat-treated.Present embodiment In, which includes following sub-step:
S61: quenching valve body blank 10C, and the temperature of quenching is preferably 530 DEG C -560 DEG C, and the time is preferably 2-4 small When.
S62: ageing treatment is carried out to the valve body blank 10C by quenching, the holding temperature of ageing treatment is preferably 170 DEG C -200 DEG C, the time is preferably 5-8 hours.
S7: being surface-treated the valve body blank 10C Jing Guo above-mentioned heat treatment, in present embodiment, the surface treatment Including at least one of grinding, polishing, pickling.
S8: finishing valve body blank 10C, and above-mentioned in valve body 10 each open is processed on valve body blank 10C Hole.In the present embodiment, step S8 includes following sub-step:
S81: the valve body blank 10C Jing Guo above-mentioned surface treatment is gripped using profiling jig.Please refer to figure 10 and Figure 11, the profiling jig 300 that present embodiment uses include pedestal 310, clamp assemblies 320, cylinder 330.Clamp assemblies 320 include fixing piece 321 and movable part 322, and fixing piece 321 and movable part 322 are blocky clamping piece, and fixing piece 321 A part of exterior contour with valve body blank 10C is formed with by the means that wire cutting and/or electric pulse are processed in part of the surface (it is specifically as follows the one side that the formation with valve body 10 has multiple arcs protrusion part, i.e. the side of the negative sense meaning of X-axis in Fig. 1 Corresponding a part of exterior contour) corresponding first clamping face 323, in the part of the surface of movable part 322 also by wire cutting and/ Or the means of electric pulse processing are formed with and (are specifically as follows and valve body 10 with another part exterior contour of valve body blank 10C It is formed with the another side of multiple arcs protrusion part, i.e. the signified corresponding a part of outer wheels in side of the forward direction of X-axis in Fig. 1 It is wide) corresponding second clamping face 323.In use, fixing piece 321 is fixed on pedestal 310, the second clamping face of movable part 322 324 are mutually aligned by the first clamping face 323 with fixing piece 321, and valve body blank 10C is placed on the first clamping face 323 and Between two clamping faces 324, make the outer wheels of corresponding part on the first clamping face 323 and the second clamping face 324 and valve body blank 10C Exterior feature is mutually aligned.Later, movable part 322 is pushed along the surface of pedestal 310 to fixing piece 321 by cylinder 330, the first folder It holds face 323 and the second clamping face 324 to coincide with the portion of external profile of valve body blank 10C respectively, valve body blank 10C fixing clamp It holds between fixing piece 321 and movable part 322, while the part for making to need to be machined out on valve body blank 10C is (such as thereon The end face of each cylindrical part) all expose between fixing piece 321 and movable part 322, to carry out subsequent machining.
S82: to the part for forging and pressing out by above-mentioned upper wide diameter portion 230A and lower wide diameter portion 230B of valve body blank 10C, i.e., The end of the blank of the blank and second pipe interconnecting piece 124 of first pipe interconnecting piece 123 carries out Milling Process, removes above-mentioned remaining M1 is measured, so that the of the blank length of the blank of first pipe interconnecting piece 123 and second pipe interconnecting piece 124 and finished product valve body 10 One pipe connection portion 123 is consistent with the length of second pipe interconnecting piece 123.
S83: it is (referred to as horizontal that the axial direction each aperture perpendicular with the length direction of valve body 10 is drilled out on valve body blank 10C To aperture), i.e., above-mentioned return flow line 121, the first recirculation hole 143, the second recirculation hole 144, the first fixation hole 132a, second are consolidated Determine hole 133a.The specific processing sequence for forming these lateral openings is no specific limitation, can be any according to specific requirements It arranges.
S84: the consistent each aperture of length direction that axial direction and valve body 10 are drilled out on valve body blank 10C is (referred to as longitudinal Aperture), i.e., the first above-mentioned mounting hole 111, the second mounting hole 122, third mounting hole 125, upper rod aperture 135, lower rod aperture 136, Valve opening 145, valve chamber 151.In the present embodiment, specific processing sequence be from the top of valve body blank 10C from top to bottom according to It is secondary to process the first mounting hole 111, the second mounting hole 122, third mounting hole 125 and upper rod aperture 135, then again from valve body blank The bottom end of 10C successively processes valve chamber 151, valve opening 145 and lower rod aperture 136 from the bottom up.Certainly, in other embodiments, According to specific requirements, the specific processing sequence for forming the longitudinal aperture of the grade is adjustable.By the son of the formation longitudinal direction aperture The reason of step S84 is placed on after the sub-step S83 to form lateral opening is that longitudinal aperture is relative to the usual internal diameter of lateral opening Smaller, structure is complex, to longitudinal aperture carry out finishing than to lateral opening carry out finishing difficulty it is bigger, therefore elder generation shape Longitudinal aperture is re-formed at lateral opening, prevents the process of lateral opening from making to the processing quality of established longitudinal aperture At influence.
S85: after processing above-mentioned lateral opening and longitudinal aperture, that is, the manufacture of valve body 10 is completed, at this time by valve body 10 It is removed from profiling jig.
In the present embodiment, sub-step S82 is completed before sub-step S83 and S84.In other embodiments In, sub-step S82 may also be completed after sub-step S83 or after sub-step S84.
S9: by air tank head 20 as described above, valve rod 30, spool 40, regulating mechanism 50 and reflux portion sealing ring 91, tabletting 92, upper rod aperture sealing ring 93 and valve chamber sealing ring 94 are assembled on valve body 10 according to assembly method as described above, to complete The manufacture of heating power expansion valve 100.The concrete operation method for assembling the grade components can refer to the prior art, therefore here without superfluous It states.
It is appreciated that the other embodiments of the manufacturing method of heating power expansion valve provided by the invention can be used for manufacturing The thermal expansion valve body of other shapes, as long as being according to the shape that specific requirement changes upper impression 210A and lower impressions 210B It can.
It is by cutting aluminium bar material or aluminium alloy in the embodiment of thermal expansion valve manufacturing method provided by the invention After bar forms valve body blank, then the valve body for carrying out forging and stamping and aperture to valve body blank and forming heating power expansion valve is (such as above-mentioned The valve body 10 of heating power expansion valve 100).It, can be directly in valve body blank since valve body blank is formed using forging and stamping mode All directions on all forge and press out required complicated shape, without as it is existing by cutting profile formed valve body blank side Method is the same to form biggish plane in valve body blank two sides.Compared with prior art, the heating power expansion valve provided according to the present invention The valve body profile for the heating power expansion valve that manufacturing method manufactures is more accurate, and can have smaller volume and weight.
It should be understood that above embodiments are merely to illustrate the present invention and not limit technical side described in the invention Case, although this specification is referring to the above embodiments, the present invention has been described in detail, the common skill of this field Art personnel should be appreciated that person of ordinary skill in the field still can modify or equivalently replace the present invention, and All do not depart from the technical solution and its improvement of the spirit and scope of the present invention, should all cover in scope of the presently claimed invention It is interior.

Claims (10)

1. a kind of manufacturing method of heating power expansion valve, the heating power expansion valve includes valve body, air tank head, valve rod and spool, spy Sign is, method includes the following steps:
Intercept one section of aluminium alloy bar with predetermined length；
Mold is provided, the mold includes upper mold and lower die, and the upper mold offers upper impression, and the lower die offers mo(u)ld bottom half Chamber；
The bar is forged and pressed in the mold, using the upper impression and lower impressions of the mold by the master of the bar It is corresponding with the upper impression that body portion disposably forms a part of exterior contour, another part exterior contour and the lower impressions pair The valve body blank answered；
Drilling processing is carried out to the valve body blank, is manufactured into the valve body of heating power expansion valve, wherein the valve body includes being in Air tank head mounting portion, reflux portion, valve body interconnecting piece, flow control division and the base portion of integral structure；The valve body interconnecting piece packet Interconnecting piece main body is included, the side in the reflux portion is arranged in the air tank head mounting portion, and the interconnecting piece main body is arranged described The other side backwards to the air tank head mounting portion in reflux portion, the flow control division include the first throughput and the second circulation The side backwards to the reflux portion of the interconnecting piece main body is arranged in portion, first throughput, and the base portion setting exists The side backwards to the interconnecting piece main body of first throughput, second throughput is from the base portion or part Ground extends out from the base portion, the interconnecting piece main body include be connected to the interconnecting piece main body top and bottom it Between two opposite end faces, the axial direction that the distance between two end faces of the interconnecting piece main body are less than the reflux portion is long Degree；Wherein the valve body offers the valve opening for fluid circulation between first throughput and the second throughput；
The spool is mounted on the valve inner, the spool is made to be directed at the valve opening；The valve rod is passed through into described return Stream portion and the valve body interconnecting piece make one end of the valve rod be directed at the spool；The air tank head and the air tank head are pacified Dress portion is relatively fixed, and one end of the valve rod is supported or is fixed on the air tank head.
2. the method as described in claim 1, which is characterized in that this method is further comprising the steps of:
Before being forged and pressed to the bar intercepted, it is surface-treated, the surface treatment includes unhairing Thorn processing and cleaning；
After being surface-treated to the bar, isothermal holding is carried out to the bar, the temperature of the isothermal holding is 400 DEG C -480 DEG C, the time is 1.5-4 hours.
3. the method as described in claim 1, which is characterized in that this method is further comprising the steps of:
Before carrying out drilling processing to the valve body blank, the valve body blank is heat-treated；
Valve body blank Jing Guo the heat treatment is surface-treated, the surface treatment includes grinding, polishes, in pickling It is at least one.
4. method as claimed in claim 3, which is characterized in that the heat treatment includes:
The valve body blank is quenched, the temperature of quenching is 530 DEG C -560 DEG C, and the time is 2-4 hours；
Ageing treatment is carried out to the valve body blank by quenching, the holding temperature of ageing treatment is 170 DEG C -200 DEG C, the time It is 5-8 hours.
5. the method as described in claim 1, it is characterised in that: the interior shape of the upper impression and the air tank head are installed Portion, reflux portion, valve body interconnecting piece, flow control division and base portion the shape of the same side mutually coincide or substantially mutual kiss It closes, the interior shape of the lower impressions and described in the air tank head mounting portion of integral structure, reflux portion, valve body interconnecting piece, flow The shape of the other side of adjustment portion and base portion mutually coincide or substantially mutually coincide.
6. the method as described in any one of claim 1-5, it is characterised in that: the air tank head mounting portion and the reflux The shape in portion substantially circular ring shape or cylindrical shape, one end of the air tank head mounting portion and the part area of reflux portion side Domain is connected, the portion of the other side backwards to the air tank head mounting portion in the top of the interconnecting piece main body and the reflux portion Point surface is connected；The shape of first throughput and the second throughput is substantially cylindrical, first throughput The partial region of side be connected with the bottom of the interconnecting piece main body；The base portion it is generally cylindrical in shape, The partial region of the side backwards to the interconnecting piece main body of one end and first throughput is connected；The second A part of the one end in logical portion is connected with a part of first throughput one end, and the end of second throughput is another A part of a part with the outer peripheral surface of the base portion is connected；Or the end of second throughput and the pedestal A part of the outer peripheral surface in portion is connected；The axial direction in the reflux portion, the first throughput and the second throughput be parallel to each other or It is substantially parallel to each other, and axially vertical or substantially vertical with the air tank head mounting portion and base portion.
7. method as claimed in claim 6, it is characterised in that: the interconnecting piece main body includes being connected to the interconnecting piece main body Top and bottom between two opposite sides described in interconnecting piece main body the distance between two end faces and the pedestal The diameter in portion is roughly equal or diameter less than the base portion；The table on the surface in the reflux portion and first throughput Face, which is all formed with, is respectively relative to described two side surfaces protrusions, is generally shaped like the convex surface of semi-cylindrical；The valve body Interconnecting piece further includes the first department of assembly for being limited to the heating power expansion valve for cooperating with installation part；First dress What being generally shaped like with portion was provided with the semicylinder of through-hole or the radial section of the first department of assembly is generally shaped like C-shaped Or V-arrangement；First department of assembly is convexly equipped at least one described side of the interconnecting piece main body, and first department of assembly Axial direction and the reflux portion, the first throughput and the second throughput axial direction it is parallel or substantially parallel；The valve body interconnecting piece It further include the second department of assembly for being limited to the heating power expansion valve for cooperating with installation part；Second department of assembly Outer shape is substantially cylindrical, outwardly protrudes from the side of the valve body, it is axial parallel with the axial direction in the reflux portion or It is substantially parallel, and second department of assembly is provided with the screw connection structure of non through hole.
8. the method as described in any one of claim 1-5, which is characterized in that the method also includes following steps:
When by the mold clamping, the gap that width is 1.3-1.7 millimeters is reserved between the upper mold and the lower die；
It is forged and pressed in the mold by the bar, using the upper impression and lower impressions of the mold by the bar Main part forms that a part of exterior contour is corresponding with the upper impression, and another part exterior contour is corresponding with the lower impressions While valve body blank, so that the redundance of the bar is squeezed into the gap and forge into and be connected to the valve body blank week The overlap on side；
Before carrying out drilling processing to the valve body blank, the overlap is cut off.
9. the method as described in any one of claim 1-5, it is characterised in that: the valve body includes reflux portion, and described time Stream portion it is generally cylindrical in shape, it is axial vertical or substantially vertical with the length direction of the valve body, and the reflux The outer diameter and inner diameter at the both ends in portion expands, and forms first pipe interconnecting piece at the both ends in the reflux portion respectively and second pipe connects Socket part；The both ends of the upper impression are formed with wide diameter portion, and the both ends of the lower impressions are formed with lower wide diameter portion, described expanding The axial length of portion and the lower wide diameter portion is than the first pipe interconnecting piece or the axial length of the second pipe interconnecting piece It is 1-2 millimeters long；The method also includes following steps:
When molding the upper mold and lower die, the upper wide diameter portion and the lower wide diameter portion is made to be combined to form interconnecting piece forging and stamping A part of the bar is forged into the blank of the first pipe interconnecting piece and described by chamber in interconnecting piece forging and stamping chamber The blank of second pipe interconnecting piece；
The end of the blank of blank and second pipe interconnecting piece to the first pipe interconnecting piece carries out Milling Process, so that institute State length and the first pipe interconnecting piece and second of the blank of first pipe interconnecting piece and the blank of second pipe interconnecting piece The length of pipe connection portion is consistent.
10. the method as described in any one of claim 1-5, it is characterised in that: described to be bored to the valve body blank Hole machined, the step of being manufactured into the valve body with valve opening of heating power expansion valve include following sub-step:
Profiling jig is provided, the profiling jig includes fixing piece and movable part, passes through line in the part of the surface of the fixing piece The means of cutting and/or electric pulse processing are formed with the first clamping corresponding with a part of exterior contour of the valve body blank Face is formed and the valve body blank by the means that wire cutting and/or electric pulse are processed in the part of the surface of the movable part Corresponding second clamping face of another part exterior contour；
The valve body blank is placed between first clamping face and the second clamping face, drives the movable part towards described solid Determine part one end, clamped using first clamping face and the second clamping face and fixes the valve body blank；
The axial and perpendicular aperture of valve body length direction is drilled out on the valve body blank；
The axial and valve body consistent aperture of length direction is drilled out on the valve body blank.
CN201410740909.0A 2014-12-08 2014-12-08 Thermal expansion valve manufacturing method Active CN105736745B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1393300A (en) * 2001-06-22 2003-01-29 沈海星 Technology for manufacturing blank of valve ball
CN1462844A (en) * 2002-05-29 2003-12-24 刘时通 Method for manufacturing valve body
CN101074736A (en) * 2006-05-19 2007-11-21 浙江三花制冷集团有限公司 Thermodynamic expansion valve
CN103016830A (en) * 2011-09-28 2013-04-03 杭州三花研究院有限公司 Thermal expansion valve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100582534C (en) * 2006-07-07 2010-01-20 浙江三花汽车控制系统有限公司 Thermal expansion valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1393300A (en) * 2001-06-22 2003-01-29 沈海星 Technology for manufacturing blank of valve ball
CN1462844A (en) * 2002-05-29 2003-12-24 刘时通 Method for manufacturing valve body
CN101074736A (en) * 2006-05-19 2007-11-21 浙江三花制冷集团有限公司 Thermodynamic expansion valve
CN103016830A (en) * 2011-09-28 2013-04-03 杭州三花研究院有限公司 Thermal expansion valve

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