CN105736745A - Thermal expansion valve manufacture method - Google Patents

Thermal expansion valve manufacture method Download PDF

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Publication number
CN105736745A
CN105736745A CN201410740909.0A CN201410740909A CN105736745A CN 105736745 A CN105736745 A CN 105736745A CN 201410740909 A CN201410740909 A CN 201410740909A CN 105736745 A CN105736745 A CN 105736745A
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China
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valve body
throughput
connecting portion
blank
valve
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CN201410740909.0A
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CN105736745B (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 invention provides a thermal expansion valve manufacture method; the method can cut aluminum bar material or aluminium alloy rod material to form a valve body blank; the valve body blank is forged, stamped and punched so as to form the thermal expansion valve body. The valve body blank is formed by forage and stamp mode, so each direction of the valve body blank can be foraged and stamped to form needed complex shapes, and the thermal expansion valve body layout can be more precise; the thermal expansion valve formed by the method is smaller in size and weight.

Description

Thermal expansion valve manufacturing method
[technical field]
The present invention relates to throttling control field, particularly relate to the manufacture method of a kind of heating power expansion valve.
[background technology]
Heating power expansion valve (ThermostaticExpansionValve, TXV) it is air-conditioning and the commonly used throttle part of refrigeration plant, the liquid refrigerant carrying out condenser can be throttled and blood pressure lowering by it, and the flow of the cold-producing medium sending into vaporizer from condenser is regulated according to the temperature of evaporator outlet, to adapt to the needs that cooling load is continually changing.The General Principle that refrigerant flow is controlled by heating power expansion valve is: sensed the temperature of evaporator outlet by air tank head, medium in air tank head produces the thermal expansion of degree of correspondence according to the temperature that air tank head senses, the valve rod being connected with air tank head by thermal expansion pair produces pressure, valve rod promotes spool to move under the driving of this pressure, thus regulating the aperture of valve opening, reach the effect of adjusting refrigerant flow rate.
Existing thermal expansion valve manufacturing method is usually the shape such as aluminium section bar adopting strip as raw material, along the direction vertical with the length direction of this section bar, it is cut, using the metal derby that cuts as valve body blank, then on valve body blank, processing is portalled and is and forms the valve body of heating power expansion valve, then the parts such as the air tank head of heating power expansion valve, valve rod, spool, governor motion are assembled on valve body.But, the valve body blank so cut down have at least two relative sides (two cross sections namely formed in valve body blank both sides during cutting) be bigger plane, valve body is so easily made to form the overall structure that exterior contour is comparatively straight, its volume and weight is all relatively larger, thus increasing the manufacturing cost of heating power expansion valve.And, actual manufacture process it may also be desirable to planar section process for further processing bigger on valve body blank, to form the complex shape of more use value, this necessarily makes the manufacturing process of heating power expansion valve more loaded down with trivial details.
Therefore, it is necessary to existing technology is improved, to solve above technical problem.
[summary of the invention]
It is an object of the invention to provide a kind of operation easier and be conducive to the thermal expansion valve manufacturing method of Improving The Quality of Products.
For achieving the above object, the present invention adopts the following technical scheme that the manufacture method of a kind of heating power expansion valve, described heating power expansion valve includes valve body, air tank head, valve rod and spool, it is characterised in that the method comprises the following steps: intercept one section of aluminium alloy bar with predetermined length；Thering is provided mould, described mould includes mould and counterdie, and described upper mould offers upper impression, and described counterdie offers lower impressions；Described bar is forged and pressed in the mold, utilizes the upper impression of described mould, with lower impressions, the main part of described bar is formed a part of exterior contour corresponding with described upper impression, the valve body blank that another part exterior contour is corresponding with described lower impressions；Described valve body blank being carried out Drilling operation, is manufactured into the valve body of heating power expansion valve, wherein said valve body includes being the air tank head installation portion of integrative-structure, backflow portion, valve body connecting portion, flow control division and base portion；Described valve body connecting portion includes connecting portion main body, described air tank head installation portion is arranged on the side in described backflow portion, described connecting portion main body is arranged on the opposite side of the described dorsad air tank head installation portion in described backflow portion, described flow control division includes the first throughput and the second throughput, described first throughput is arranged on the side in the described dorsad backflow portion of described connecting portion main body, described base portion is arranged on the side of the described dorsad connecting portion main body of described first throughput, described second throughput is described base portion or partly extends out described base portion；Wherein said valve body offers the valve opening for fluid circulation between described first throughput and the second throughput；Described spool is arranged on described valve inner, makes described spool be directed at described valve opening；By described valve rod through described backflow portion and described valve body connecting portion, one end of described valve rod is made to be directed at described spool；Described air tank head and described air tank head installation portion are relatively fixed, one end of described valve rod is supported or is fixed on described air tank head.
The method is further comprising the steps of: before the described bar intercepted is forged and pressed, it being carried out surface treatment, described surface treatment includes deburring and cleaning；After described bar is carried out surface treatment, described bar carrying out isothermal holding, the temperature of described isothermal holding is 400 DEG C-480 DEG C, and the time is 1.5-4 hour.
The method is further comprising the steps of: before described valve body blank is carried out Drilling operation, described valve body blank is carried out heat treatment；Carrying out surface treatment to through described heat treated valve body blank, described surface treatment includes at least one in grinding, polishing, pickling.
Described heat treatment includes: described valve body blank is quenched, and the temperature of quenching is 530 DEG C-560 DEG C, and the time is 2-4 hour；Described valve body blank through quenching is carried out Ageing Treatment, and the holding temperature of Ageing Treatment is 170 DEG C-200 DEG C, and the time is 5-8 hour.
The shape of the same side of the interior shape of described upper impression and described air tank head installation portion, backflow portion, valve body connecting portion, flow control division and base portion is mutually coincide or substantially mutually coincide, and the shape of the interior shape of described lower impressions and the opposite side of described air tank head installation portion in integrative-structure, backflow portion, valve body connecting portion, flow control division and base portion is mutually coincide or substantially mutually coincide.
The shape in described air tank head installation portion and described backflow portion all substantially annular or cylindrical shape, one end of described air tank head installation portion and the subregion of side, described backflow portion are connected, and the part surface of the opposite side of the top of described connecting portion main body and the described dorsad air tank head installation portion in described backflow portion is connected；The shape of described first throughput and the second throughput is all substantially cylindrical, and the subregion of the side of described first throughput is connected with the bottom of described connecting portion main body；Described base portion generally cylindrical in shape, the subregion of the side of the described dorsad connecting portion main body of its one end and described first throughput is connected；The part of one end of described second throughput is connected with the part of first throughput one end, and another part of this end of described second throughput is connected with a part for the outer peripheral face of described base portion；Or this end of described second throughput is connected with a part for the outer peripheral face of described base portion；Axially being parallel to each other or be substantially parallel to each other of described backflow portion, the first throughput and the second throughput, and equal axially vertical or substantially vertical with described air tank head installation portion and base portion.
Two relative sidepieces that described connecting portion main body includes being connected between top and the bottom of described connecting portion main body and two relative end faces；Distance between two end faces of described connecting portion main body is less than the axial length in described backflow portion, and roughly equal with the diameter of described base portion or less than described base portion diameter；The surface in described backflow portion and the surface of described first throughput are all formed and are respectively relative to what said two side surfaces was protruded, are generally shaped like the convex surface of semi-cylindrical；Described valve body connecting portion also includes for coordinating with installed part, and described heating power expansion valve carries out the first spacing department of assembly；Described first department of assembly is generally shaped like the semicylinder being provided with through hole, or the radial section of the first department of assembly be generally shaped like C shape or V-arrangement；Described first department of assembly is convexly equipped at least one described sidepiece of described connecting portion main body, and axially axially in parallel or almost parallel with described backflow portion, the first throughput and the second throughput of described first department of assembly；Described valve body connecting portion also includes for coordinating with installed part, and described heating power expansion valve carries out the second spacing department of assembly；The external shape substantially cylindrical of described second department of assembly, outwardly from the side of described valve body, it is axially in parallel or almost parallel with described backflow portion axially, and described second department of assembly is provided with the screw connection structure of non through hole.
Described method is further comprising the steps of: when by described mould matched moulds, reserves, on described, the gap that width is 1.3-1.7 millimeter between mould and described counterdie；Described bar is being forged and pressed in the mold, it is corresponding with described upper impression that the main part of described bar is formed a part of exterior contour with lower impressions by the upper impression utilizing described mould, while the valve body blank that another part exterior contour is corresponding with described lower impressions, make the redundance of described bar be squeezed into described gap and forge into the overlap that is connected to described valve body blank periphery；Before described valve body blank is carried out Drilling operation, excise described overlap.
Described valve body includes backflow portion, described backflow portion generally cylindrical in shape, it is axially vertical or substantially vertical with the length direction of described valve body, and the external diameter at the two ends in described backflow portion and internal diameter expand, form the first pipe connection portion and second pipe connecting portion respectively at the two ends in described backflow portion；The two ends of described upper impression are formed with wide diameter portion, and the two ends of described lower impressions are formed with lower wide diameter portion, the axial length 1-2 millimeter longer than the axial length of described first pipe connection portion or described second pipe connecting portion of described upper wide diameter portion and described lower wide diameter portion；Described method is further comprising the steps of: when by mould on described with counterdie matched moulds, make described upper wide diameter portion and described lower wide diameter portion be combined to form connecting portion forging and stamping chamber, a part for described bar is forged and pressed in chamber at described connecting portion and forges into the blank of described first pipe connection portion and the blank of described second pipe connecting portion；The end of the blank of described first pipe connection portion and the blank of second pipe connecting portion is carried out Milling Process so that the blank of described first pipe connection portion is consistent with the length of described first pipe connection portion and second pipe connecting portion with the length of the blank of second pipe connecting portion.
Described described valve body blank is carried out Drilling operation, the step of the valve body with valve opening being manufactured into heating power expansion valve includes following sub-step: provide profiling jig, described profiling jig includes fixture and movable part, the part surface of described fixture is cut by line and/or the means of electric pulse processing are formed with first clamping face corresponding with a part of exterior contour of described valve body blank, the part surface of described movable part is cut by line and/or the means of electric pulse processing form second clamping face corresponding with another part exterior contour of described valve body blank；Described valve body blank is placed between described first clamping face and the second clamping face, drives described movable part towards described fixture one end, use described first clamping face and the second clamping face to clamp and fix described valve body blank；Described valve body blank gets out the perforate that the length direction of axial and described valve body is perpendicular；Described valve body blank gets out the perforate that the length direction of axial and described valve body is consistent.
Compared with prior art, thermal expansion valve manufacturing method provided by the invention is to form valve body blank by cutting aluminium bar material or aluminium alloy bar, then valve body blank is forged and pressed and perforate and form the valve body of heating power expansion valve.Owing to valve body blank adopts forging and stamping mode to be formed, therefore required complicated shape directly can all be forged and pressed out in all directions of valve body blank, without forming bigger plane as the existing method forming valve body blank by cutting section bar in valve body blank both sides.Compared with prior art, the operation of the method for the present invention is easier, and the valve body profile of the heating power expansion valve manufactured according to the method for the present invention is more accurate, and can have less volume and weight.
[accompanying drawing explanation]
Fig. 1 is the schematic perspective view of the heating power expansion valve manufactured according to an embodiment of thermal expansion valve manufacturing method provided by the invention；
Fig. 2 is the internal structure cross-sectional schematic of the heating power expansion valve embodiment shown in Fig. 1；
Fig. 3 is the exploded view of the heating power expansion valve embodiment shown in Fig. 1.
When Fig. 4 is to manufacture heating power expansion valve according to an embodiment of thermal expansion valve manufacturing method provided by the invention, the valve body of heating power expansion valve schematic diagram under each process segment.
Fig. 5 is the schematic diagram of the mould of an embodiment use of thermal expansion valve manufacturing method provided by the invention.
Fig. 6 is the partial cutaway view schematic of the mould shown in Fig. 5.
Fig. 7 is the cross-sectional schematic during mould matched moulds shown in Fig. 5.
Fig. 8 is the schematic diagram that aluminium alloy bar is forged into valve body blank by an embodiment according to thermal expansion valve manufacturing method provided by the invention.
Fig. 9 is Fig. 7 schematic diagram under another visual angle.
Figure 10 is the schematic diagram of the profiling jig of an embodiment use of thermal expansion valve manufacturing method provided by the invention.
Figure 11 is the schematic diagram using the profiling jig clamping valve blank shown in Figure 10.
[detailed description of the invention]
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
The present invention provides the manufacture method of a kind of heating power expansion valve, and it forms valve body blank by cutting aluminium bar material or aluminium alloy bar, then valve body blank is forged and pressed and perforate and form the valve body of heating power expansion valve.The valve body profile of the heating power expansion valve manufactured according to the method for the present invention is more accurate, and can have less volume and weight.The feature of heating power expansion valve product according to thermal expansion valve manufacturing method manufacture provided by the invention and the concrete steps of the method will be done detailed introduction below.
Shown in Fig. 1 to Fig. 3 is that it includes valve body 10, air tank head 20, valve rod 30, spool 40 and governor motion 50 according to the heating power expansion valve 100 manufactured by an embodiment of thermal expansion valve manufacturing method provided by the invention.This heating power expansion valve 100 is applicable to multiple fluid carries out throttling control, in the present embodiment in order to describe more directly perceived, only control and is described in detail being used in automotive air-conditioning system by this heating power expansion valve 100 to cold-producing medium carrying out throttling；But those skilled in the art obviously should be understood that, it is possible to the type of fluid being carried out throttling control by this heating power expansion valve 100 is not limited to cold-producing medium.
The concrete structure of each element above-mentioned, assembly method and using method will be done concrete introduction below.For the ease of describing, from here on the valve body 10 shown in figure is in the end of the top shown in figure and calls top, be in the end of lower section shown in figure and be called bottom；The part being closer to top in valve body 10 is called top, and the part being closer to bottom is called bottom, and the part between top and bottom is called middle part.When the geometrical relationship described between some parts, it is possible to the saying of " substantially vertical " and " almost parallel " can be related to.Hereinafter, " substantially vertical " and " almost parallel " between parts refers to, although substantially not accurate perpendicular and parallel relation of hanging down between parts, if but not past accurate measurement, then its position relationship intuitively with accurate perpendicular and parallel very difficult difference of hanging down, for instance angular deviation is not more than the situation of 1 degree.
Valve body 10 is formed through cutting, forging and stamping and perforate processing by aluminum alloy materials such as bar, including integrated air tank head installation portion 11, backflow portion 12, valve body connecting portion 13, flow control division 14 and base portion 15.It is to be herein pointed out valve body 10 is one-body molded and make by the aluminum alloy materials of monoblock, therefore the various piece of valve body 10 is all connected, and does not wherein have and fits together with other parts after any part is a separately formed again.In below the detailed construction of valve body 10 being introduced, succinct sometimes for the directly perceived of statement and word, " connection " may be used to describe the relation between some part of valve body 10, when " but connection " is used in these occasions, referring to has subregion to be mutually connected from start to finish between the different piece of valve body 10, it is originally separate to be not meant between some part of valve body 10, fits together then through other connection means.
Air tank head installation portion 11 is formed on valve body 10 top, and it is generally shaped like cylinder, axially consistent with the length direction of valve body 10 (i.e. Z-direction shown in Fig. 1).The central authorities of this air tank head installation portion 11 axially offer the first installing hole 111 of cylinder, this the first installing hole 111 one end open is in the top (namely the top of valve body 10) of air tank head installation portion 11, the other end runs through whole air tank head installation portion 11, and extends in the backflow portion 12 being connected with air tank head installation portion 11.The internal partial wall internal diameter close to valve body 10 top of this first installing hole 111 expands and forms the first annular seal groove 112.Bottom corresponding to this first mounting groove 112, air tank head installation portion 11 has been internally formed annular table terrace 113, and periphery (namely near the part of the air tank head installation portion 11 inwall) depression of this step surface 113 is gone down and formed the second annular seal groove 114.It is to say, this second seal groove 114 is opened in the bottom of the first seal groove 112, collectively form, with the first seal groove 112, the compound seal groove that cross section is generally L-shaped.
The cylindrical shape that backflow portion 12 is generally hollow, it is arranged axially along the Y direction shown in Fig. 1, vertical with the length direction of valve body 10 or substantially vertical, and its central authorities axially offer the return flow line 121 of cylinder；The both sides in this backflow portion 12 convex to form the convex surface of substantially semi-cylindrical respectively, the protrusion direction of these two convex surfaces be respectively the X-direction shown in Fig. 1 positively and negatively, this two convex surfaces axially then all parallel with the Y direction shown in Fig. 1.The bottom (namely air tank head installation portion 11 is towards one end of valve body 10 bottom) of air tank head installation portion 11 is connected towards the subregion of the side on valve body 10 top with on backflow portion 12 outer surface.The sidewall in this backflow portion 12 offers the second installing hole 122 of cylinder also throughly, the internal diameter of this second installing hole 122 is less than the internal diameter of the first installing hole 111, and first installing hole 111 and the second installing hole 122 be mutually aligned coaxially, the top (namely towards the one end on valve body 10 top) of the second installing hole 122 and the first installing hole 111 stretch into the one end in backflow portion 12 and are interconnected, and the bottom (namely towards one end of valve body 10 bottom) of the second installing hole 122 connects with return flow line 121.The two ends bore of return flow line 121 expands, and forms the first pipe connection portion 123 and second pipe connecting portion 124 for connecting fluid-transporting tubing, the shape of this first pipe connection portion 123 and second pipe connecting portion 124 all substantially flare respectively.The inwall of the other side relative with the side being connected to air tank head installation portion 11 in backflow portion 12 is further opened with the 3rd installing hole 125 of cylinder, internal diameter and second installing hole 122 of the 3rd installing hole 125 are equal or roughly equal, and are mutually aligned coaxially across return flow line 121 and the second installing hole 122.
Valve body connecting portion 13 includes connecting portion main body 131, this connecting portion main body 131 includes the top towards valve body 10 top, towards the bottom of valve body 10 bottom and connect two sides between the top and the bottom and two end faces, these two sides and two end faces are plane or generally planar, wherein it is parallel to each other or almost parallel between individual side, being parallel to each other or almost parallel between two end faces, either side and either end facet are then mutually perpendicular to or generally perpendicularly intersect.
The side side of air tank head installation portion 11 (namely dorsad) offering the 3rd installing hole 125 in the top of this connecting portion main body 131 and backflow portion 12 is connected, the length in backflow portion 12 is more than the distance between two end faces of connecting portion main body 131, and therefore the two ends in backflow portion 12 are crossed two end faces of valve body connecting portion 13 respectively and stretched out；And the diameter in backflow portion 12 is more than the distance between two sides of connecting portion main body 131 so that the above-mentioned convex surface that both sides, backflow portion 12 convex to form is protrude relative to two sides of connecting portion main body 131.At least one side of this connecting portion main body 131 is formed the first department of assembly 132 of protrusion, this the first department of assembly 132 is shaped as semicylinder or substantially semicylinder, and it is axially and axially in parallel or almost parallel (namely parallel or substantially parallel with the Y direction shown in Fig. 1) in backflow portion 12.As shown in Figure 1, two end faces of the first department of assembly 132 are concordant with the two of connecting portion main body 131 end faces (in being namely generally aligned in the same plane) respectively, that is, distance between the axial length of the first department of assembly 132 with the two of connecting portion main body 131 end faces is equal, is the distance L2 shown in Fig. 1.This distance L2 is less than the axial length L 1 in backflow portion 12.So when carrying out die sinking for this valve body 10 of manufacture, it is possible to the shape of mould is designed to comparatively rule, simplifies manufacturing process.The core of the first department of assembly 132 axially offers the first pilot hole 132a at its two ends through.One end face of connecting portion main body 131 is formed the second department of assembly 133 of protrusion, cylindrically shaped or the substantially cylindrical of this second department of assembly 133, its axially also with axially in parallel (namely parallel with the Y direction shown in Fig. 1) in backflow portion 12, one end is vertically connected on this end face of connecting portion main body 131, and the other end stretches out outside valve body 10.The core of the second department of assembly 133 axially offers the second pilot hole 133a, and this second pilot hole 133a is the screw connection structure being opened on the second department of assembly 133 end and the blind hole being internally threaded or other non through hole.This first pilot hole 132a and the second pilot hole 133a can be used for the installed parts such as bolt corresponding with shape, rivet and coordinates, and carries out spacing to valve body 10, is fixedly fitted in automotive air-conditioning system by this valve body 10 or other use in environment.
The inside of connecting portion main body 131 is further opened with the 4th installing hole 134, upper rod aperture 135 and the lower rod aperture 136 that set gradually from its top to bottom.4th installing hole 134, upper rod aperture 135 and lower rod aperture 136 are cylindrical hole, and wherein the internal diameter of the 4th installing hole 134 is less than the internal diameter of the 3rd installing hole 125, is opened on the top of valve body connecting portion 13, connects coaxially with the 3rd installing hole 125；The internal diameter of upper rod aperture 135 is less than the internal diameter of the 4th installing hole 134, and connects coaxially with the 4th installing hole 134；The internal diameter of lower rod aperture 136, less than the internal diameter of upper rod aperture 135, connects coaxially with upper rod aperture 135, and is opened on the bottom of valve body connecting portion 13.
Flow control division 14 includes the first throughput 141 and the second throughput 142, the equal substantially cylindrical of shape of this first throughput 141 and the second throughput 142, and they axially all with axially in parallel or almost parallel (namely parallel or substantially parallel with the Y direction shown in Fig. 1) in backflow portion 12.First throughput 141 is connected towards the subregion of the side on valve body 10 top and the bottom of valve body connecting portion 13, the end face of first throughput 141 one end and an end face of valve body connecting portion 131 are in same plane, and the subregion of this end face of this first throughput 141 is connected with a part of end face of second throughput 142 one end, the other end of the first throughput 141 is then crossed another end face of valve body connecting portion 131 and is stretched out outside valve body 10.The both sides of the first throughput 141 and the both sides of the second throughput 142 all convex to form the convex surface close to semi-cylindrical, the protrusion direction of two convex surfaces that this first throughput 141 is formed be respectively the X-direction shown in Fig. 1 positively and negatively, the protrusion direction of two convex surfaces that second throughput 142 is formed also be respectively the X-direction shown in Fig. 1 positively and negatively, and the convex surface that formed with the second throughput 142 of the first throughput 141 is axial all parallel with the Y direction shown in Fig. 1.The diameter of the first throughput 141 is more than the distance between two sides of connecting portion main body 131 so that the above-mentioned convex surface that the first throughput 141 both sides convex to form is protrude relative to two sides of connecting portion main body 131.First throughput 141 offers first-class through hole 143, this first-class through hole 143 is the axially extended stepped hole along the first throughput 141, it includes the first exit orifice portion 143a and the first endoporus portion 143b, this first exit orifice portion 143a and the first endoporus portion 143b is cylindrical hole and is interconnected coaxially, the internal diameter of the first exit orifice portion 143a internal diameter more than the first endoporus portion 143b.Wherein, it is internal that the first endoporus portion 143b is arranged on the first throughput 141, and lower rod aperture 136 extends to the first throughput 141 from valve body connecting portion 13 is internal, and connects towards the side on valve body 10 top with the first endoporus portion 143b.First exit orifice portion 143a is arranged on outside the first endoporus portion 143b, and its one end connects coaxially with the first endoporus portion 143b, and the other end forms opening in the first throughput 141 on the one end stretched out outside valve body 10.In the present embodiment, the diameter of the diameter of this opening that this first exit orifice portion 143a is formed other parts relative to this first exit orifice portion 143a expands further, formed substantially flare, for connecting the 3rd pipe connection portion 143c of fluid-transporting tubing.
In present embodiment, in the end face of the 3rd pipe connection portion 143c end and the end face of the first pipe connection portion 123 end are generally aligned in the same plane, it is to say, the end face of one end, described backflow portion 121 concordant with the end face of described first throughput 141 end (in being namely generally aligned in the same plane).So when carrying out die sinking for this valve body 10 of manufacture, it is possible to the shape of mould is designed to comparatively rule, simplifies manufacturing process.This first throughput 141 is further opened with the valve opening 145 for regulated fluid flow.This valve opening 145 is cylindrical hole, is interconnected with the opposite side towards valve body 10 bottom of this first endoporus portion 143b, and is mutually aligned coaxially across the first endoporus portion 143b with lower rod aperture 136.
As mentioned above, the portion end surface (for portion end surface above in figure) of second throughput 142 one end is connected with the subregion of an end face of the first throughput 141, the other end of the second throughput 142 then extends outside valve body 10, the bearing of trend of its bearing of trend and the first throughput 141 is contrary, and namely the first throughput 141 and the second throughput 142 extend out from the opposite sides of valve body 10 respectively.Second throughput 142 offers second through hole 144, this second through hole 144 is the axially extended stepped hole along the second throughput 142, it includes the second exit orifice portion 144a and the second endoporus portion 144b, this second exit orifice portion 144a and the second endoporus portion 144b is cylindrical hole and is interconnected coaxially, the internal diameter of the second exit orifice portion 144a internal diameter more than the second endoporus portion 144b.Wherein, it is internal that second endoporus portion 144b is arranged on the second throughput 142, second exit orifice portion 144a is arranged on outside the second endoporus portion 144b, and its one end connects coaxially with the second endoporus portion 144b, and the other end forms opening in the second throughput 142 on the one end stretched out outside valve body 10.In the present embodiment, the diameter of the diameter of this opening that this second exit orifice portion 144a is formed other parts relative to this second exit orifice portion 144a expands further, formed substantially flare, for connecting the 4th pipe connection portion 144c of fluid-transporting tubing.In present embodiment, in the end face of the end face of the 4th pipe connection portion 144c end and the end face of second pipe connecting portion 124 end and the second department of assembly 133 end is generally aligned in the same plane, it is to say, the end face of one end, described backflow portion 121 concordant with the end face of the end face of described second throughput 142 end and described second department of assembly 133 end (in being namely generally aligned in the same plane).So when carrying out die sinking for this valve body 10 of manufacture, it is possible to the shape of mould is designed to comparatively rule, simplifies manufacturing process.
Base portion 15 is generally cylindrical, it is axially consistent with the length direction of valve body 10 (namely consistent with the Z-direction shown in Fig. 1), its top (namely towards the one end on valve body 10 top) is connected with the subregion of the side (namely towards the side of valve body 10 bottom) of the first throughput 141 connecting portion main body 131 dorsad, and another part end face (being the portion end surface being positioned below in figure) of one end being connected with the first throughput 141 of the second throughput 142 is connected with the subregion of the side of this base portion 15；The bottom of base portion 15 is exactly the bottom of valve body 10.Offering valve chamber 151 in base portion 15, this valve chamber 151 is longitudinally disposed cylindrical step hole, and it is axially consistent with the length direction of valve body 10, including the cylindrical hole section of multiple coaxial communication.Along the direction from the top of valve body 10 to the bottom of valve body 10, the diameter of each hole section is incremented by successively, bottom, that is the maximum hole section of diameter forms opening in base portion 151 bottom.The top (namely towards the one end on valve body 10 top) of valve chamber 151 extends in the first throughput 141, and connects coaxially with valve opening 145.Second endoporus portion 144b of second through hole 144 then extends in this base portion 15, and connects with the side of valve chamber 151.
The above is only the contour structures of valve body of heating power expansion valve of an embodiment of the invention, the concrete shape of all parts of valve body of heating power expansion valve of the present invention, size and structural relation is any limitation as.In other embodiments, air tank head installation portion 11, backflow portion 12, valve body connecting portion the 13, first throughput the 141, second throughput 142 and the concrete shape of base portion 15, size and structural relation are all likely to be of certain change.Such as, the first pipe connection portion 123 and second pipe connecting portion 124 that in present embodiment, the both ends open place of return flow line 121 is formed are mutually aligned, but the two is likely to and is not mutually aligned and is arranged to other position relationships in other embodiments, such as the two towards the angle that can be mutually perpendicular to or be formed other angles, and the concrete shape in backflow portion 12 can also make adaptive change therewith.Similarly, the first throughput 141 is axially and the second throughput 142 axial except being parallel to each other, it is also possible to be arranged to other position relationships, for instance be mutually perpendicular to or formed the angle of other angles.Second throughput 142 position in the vertical can be more nearly the bottom of valve body 10, its one end can be fully connected on the outer peripheral face of base portion 15 (namely whole end faces of this end are all connected with the subregion of the outer peripheral face of base portion 15), and stagger completely with the end of the first throughput 141, namely the end of the second throughput 142 is not necessarily intended to the end of the first throughput 141 and is directly connected, but makes the second throughput 142 fully but not partly extend out base portion 15.First department of assembly 132 can also be not formed on an end face of connecting portion main body 131, and is formed on the end face of first throughput 141 one end.In present embodiment, the distance (namely above-mentioned L2) between distance (namely above-mentioned L2) and two end faces of the first department of assembly 132 between diameter and two end faces of connecting portion main body 131 of base portion 15 is roughly equal, and in other embodiments, the diameter of base portion 15 can also more than the distance (namely above-mentioned L2) between the distance (namely above-mentioned L2) between the two of connecting portion main body 131 end faces and two end faces of the first department of assembly 132.
Air tank head 20 includes main part 21 and socket part 22, and wherein most of feature of main part 21 is similar with existing air tank head, be internally provided with thermal expansion medium and can by thermal expansion media expansion time generation pressure-actuated diaphragm.The shell of main part 21 protrudes and forms socket part 22, this socket part 22 is cylindrical shape, and its outer peripheral wall is the smooth face of cylinder, and the internal diameter of internal diameter and the first installing hole 111 is corresponding, may be inserted in the first installing hole 111, and utilize the such as mode such as threaded to be fixed in the first installing hole 111.Main part 21 is connected with return flow line 121 by the first installing hole 111.This air tank head 20 is for sensing the temperature of the evaporator outlet of automotive air-conditioning system, medium therein can produce the thermal expansion of degree of correspondence according to the temperature sensed, its diaphragm is driven to move by thermal expansion, the valve rod 30 being connected with air tank head 20 is produced pressure, valve rod is made to promote spool 40 to move under the driving of this pressure, thus regulating the aperture of valve opening 145, reach the effect of adjusting refrigerant flow rate.
Valve rod 30 includes drive link 31 and underdrive bar 33.The bottom of the main part 21 of air tank head 20 is supported or be fixed in one end of upper drive link 31, and shaft is through socket part the 22, first installing hole 111, return flow line the 121, second installing hole 122 and the 3rd installing hole 125, and the other end then stretches in rod aperture 135.The diameter of underdrive bar 33 is not more than the internal diameter of lower rod aperture 136, axially displaceably it is set in lower rod aperture 136, one end that its one end and upper drive link 31 stretch into rod aperture 135 supports coaxially mutually, the other end passes the first endoporus portion 143b along the axially vertical direction with the first endoporus portion 143b, and stretches in valve opening 145.
Spool 40 is steel ball in the present embodiment, is placed in valve chamber 151 and is directed at valve opening 145, and underdrive bar 53 stretches into one end alignment spool 70 of valve opening 145 and supports on spool 70.The shape of spool 40 and size are corresponding with valve opening 145, can regulate the aperture of valve opening 145 relative to valve opening 145 when it moves axially.
Governor motion 50 includes adjustment seat the 51, first spring 52, valve core frame 53 and the second spring 54.Adjustment seat 51 substantially has the round table-like of stairstepping outer peripheral face, it is closest to valve body 10 bottom, also be the maximum a part of outer peripheral face of diameter with valve chamber 151 close to valve body 10 bottom, also be that the maximum a part of inwall of internal diameter adopts the such as mode such as threaded to cooperate fixing, make adjustment seat 51 regularly and height adjustable be assemblied on valve body 10.Adjustment seat 51 central authorities offer for holding the spring eye 51a regulating spring 52.First spring 52 is cylindrical helical spring, and it is placed between adjustment seat 51 and spool 40 and is radially limited in spring eye 51a, it is possible to longitudinally flexibly stretch.Valve core frame 53 is generally cylindrical, it is placed between the first spring 52 and spool 40, its one end is enclosed within the first spring 52 coaxially, and the other end stretches out from the first spring 52 top and forms the loop diameter flange more than the first spring 52 internal diameter around, it is prevented that it is internal that valve core frame 53 falls into the first spring 52.Second spring 54 is butterfly spring, and its top is fixed on valve core frame 53 periphery, and the alar part at edge is supported on valve chamber 151 inwall, for the position of valve core frame 53 is maintained at the central authorities of valve chamber 151, it is prevented that valve core frame 53 offsets.Spool 40 is clamped in one end that valve core frame 53 stretches out from the first spring 52 top and underdrive bar 33 stretches between one end of valve opening 145.When the medium in air tank head 20 does not produce the thermal expansion of enough degree, the elastic force of the first spring 52 can drive valve core frame 53, spool 40 and valve rod 30 to be all moved upward, make spool 40 closer to valve opening 145, reduce the orifice size of valve opening 145, thus reducing the refrigerant flow by valve opening 145.
Additionally, this heating power expansion valve 100 also includes backflow portion sealing ring 91, tabletting 92, upper rod aperture sealing ring 93 and valve chamber sealing ring 94.Backflow portion sealing ring 91 is the O adopting elastomeric material such as rubber to make, and its cross section is generally L-shaped, corresponding with the shape of the compound seal groove that above-mentioned first seal groove 112 and the second seal groove 114 are constituted and size.This backflow portion sealing ring 91 is embedded in this compound seal groove, it is set on the outside side face of the insertion section 22 inserting the first installing hole 111 simultaneously, interference fit is formed between outer surface and the inner surface of air tank head installation portion 11 in insertion section 22, air tank head 20 further can be fixed, and prevent the cold-producing medium in return flow line 121 from leaking out from the first installing hole 111.Tabletting 92 is adopt the thin rounded flakes that is made of such as copper of metal material, and its diameter is with the 3rd installing hole 125 diameter accordingly, central then offer diameter and be not less than the through hole (in figure non-label) of drive link 31 diameter.This tabletting 92 is fixed in the 3rd installing hole 125, and upper drive link 31 passes from the through hole that tabletting 92 central authorities offer.Upper rod aperture sealing ring 93 is also the O adopting elastomeric material such as rubber to make, and when not deforming, on this, the external diameter of rod aperture sealing ring 93 is slightly larger than the diameter of upper rod aperture 135, and internal diameter is then slightly less than the diameter of drive link 31.On this, rod aperture sealing ring 93 is placed in the 4th installing hole 134 and spacing by tabletting 92, and rod aperture sealing ring 92 is fitted snugly on drive link 31 on this, its outer periphery is closely pressed on the 4th installing hole 134 inwall, namely between upper drive link 31 and the inwall of the 4th installing hole 134, interference fit is formed, for preventing the cold-producing medium in valve chamber 151 from being leaked out by lower rod aperture 136 and upper rod aperture 135.Valve chamber sealing ring 94 is also the O for adopting elastomeric material such as rubber to make, it is set on the outer peripheral face that a part of diameter of adjustment seat 51 is less (such as, can be embedded in the annular groove being opened on adjustment seat 51 outer peripheral face), and between the inwall of adjustment seat 51 and valve chamber 151, form interference fit, for preventing the cold-producing medium in valve chamber 151 from leaking out from valve body 10 bottom.
During use, the second through hole 144 of this heating power expansion valve 100 is connected with the refrigerant outlet of condenser by condenser output channel, and first-class through hole 143 is connected with the refrigerant inlet of vaporizer by vaporizer input channel.First pipe connection portion 123 is connected with the refrigerant inlet of vaporizer by evaporator output tube road, and second pipe connecting portion 124 is connected with the refrigerant outlet of compressor by compressor input channel.This heating power expansion valve 100 is operationally, the cold-producing medium carrying out condenser passes into valve chamber 151 from second through hole 144, if now valve opening 151 is not completely closed by the position at spool 40 place, then cold-producing medium is transported to vaporizer for freezing by valve opening 151 and first-class through hole 143.The cold-producing medium raised for temperature after freezing is discharged from vaporizer, flows back to compressor for recycling through second pipe connecting portion 124, return flow line 121 and the first pipe connection portion 123.When the cold-producing medium that temperature after using raises flows through return flow line 121, also can be touched the main part 21 of air tank head 20 by the second installing hole 112 and the first installing hole 111.After main part 21 senses the operating modes such as temperature or the temperature and pressure of cold-producing medium, medium therein produces corresponding thermal expansion according to the operating mode sensed, by thermal expansion, the upper drive link 31 of valve rod 30 is produced pressure, upper drive link 31 promotes underdrive bar 33 and spool 40 axially to move under the driving of this pressure, thus regulating the aperture of valve opening 145, regulate the refrigerant flow by valve opening 145 further.It is appreciated that, when the refrigeration of vaporizer is poor, the refrigerant temperature of backflow will raise, the degree of thermal expansion that now air tank head 20 produces will be bigger, valve rod 30 entirety can be pushed down on bigger amplitude, spool 40 is pushed up downwards and away from valve opening 145, thus expanding the aperture of valve opening 145, cause that the refrigerant flow flowing into vaporizer increases, strengthen refrigeration.If the refrigeration of vaporizer is very strong, the thermic load of air conditioning system reduces, the refrigerant temperature then refluxed will reduce, the degree of thermal expansion that air tank head 20 produces is diminished, the amplitude that valve rod 30 moves down reduces, and now regulates spring 52 meeting resilience, is again pushed up upward by spool 40, reduce the aperture of valve opening 145 so that the refrigerant flow flowing into vaporizer reduces.
Referring to Fig. 4, the thermal expansion valve manufacturing method embodiment that can be used for manufacturing above-mentioned heating power expansion valve 100 provided by the invention includes each step of the following stated.
S1: blanking.Concrete operations mode is to select cylindrical aluminium bar material or aluminium alloy bar 10A as raw material, from this bar 10A, intercept lower length slightly larger than one section of bar 10B of the predetermined length of the valve body 10 of heating power expansion valve 100, be used for being processed into valve body 10 as above.
S2: this section of bar 10B intercepted is carried out surface treatment.In present embodiment, this surface treatment operations includes the surface of bar 10B is carried out deburring and cleaning.
S3: surface treated bar 10B is carried out isothermal holding.In present embodiment, the concrete operations means of this isothermal holding are after bar 10B is heated to predetermined holding temperature, make this bar 10B maintain certain temperature retention time under this holding temperature.The holding temperature of this isothermal holding is preferably 400 DEG C-480 DEG C, and temperature retention time is preferably 1.5-4 hour.
S4: use mould that the bar 10B through the isothermal holding described in step S3 is forged and pressed, bar 10B is manufactured the valve body blank 10C that exterior contour is corresponding with valve body 10.Specifically, this step S4 includes each sub-steps of the following stated.
S41: carry out die sinking according to the concrete exterior contour of above-mentioned valve body 10, forms the mould (being appreciated that this sub-step S41 can also complete before the either step in above-mentioned steps S1-S3) that interior shape is corresponding with the exterior contour of valve body 10.
Referring to Fig. 5 to Fig. 9, the mould used in present embodiment includes mould 200A, counterdie 200B, upper bolster 201A, die shoe 201B.The shape all substantially cuboid of mould 200A and counterdie 200B on this, the middle part of the lower surface of upper mould 200A is arranged with upper impression 210A, and the middle part of the upper surface of counterdie 200B is arranged with lower impressions 210B.The size of this upper impression 210A and lower impressions 210B and shape are mutually corresponding with a part for above-mentioned valve body 10 respectively, such as, when observing valve body 10 along the Y direction shown in Fig. 1, upper impression 210A and lower impressions 210B is symmetrical, and the interior shape of the two can be mutually corresponding with right one side of something of valve body 10 and left one side of something respectively.That is, the interior shape of upper impression 210A is mutually identical with the shape of the same side (can be such as the side of the forward indication of X-axis in Fig. 1) of air tank head installation portion 11, backflow portion 12, valve body connecting portion 13, flow control division 14 and base portion 15 or substantially mutually coincide, and the interior shape of lower impressions 210B is mutually identical with the shape of the opposite side (can be such as the side of the negative sense indication of X-axis in Fig. 1) of air tank head installation portion 11, backflow portion 12, valve body connecting portion 13, flow control division 14 and base portion 15 or substantially mutually coincide.The size and dimension being meant that upper impression 210A or lower impressions 210B herein " coincideing " is completely the same with the corresponding part on valve body 10, the size and dimension of the overwhelming majority then referring to upper impression 210A or lower impressions 210B of " substantially mutually coincideing " is consistent with the corresponding part on valve body 10, but being likely to more slightly larger than the corresponding part on valve body 10 in some part, namely some part leaves certain surplus relative to the ideal dimensions of valve body 10.Content about such surplus will describe in detail hereinafter.
Offering upper mould cave 203A in the middle part of the lower surface of upper bolster 201A, its shape is corresponding with the external shape of upper mould 200A, and upper mould 200A can be embedded in upper mould cave 203A regularly.The degree of depth of the upper mould cave 203A thickness slightly larger than upper mould 200A, the big 0.65-0.85 millimeter of the thickness of mould 200A in the depth ratio of upper mould cave 203A in present embodiment, therefore after upper mould 200A is completely embedded in upper mould cave 203A, upper mould 200A towards the part surface (in figure for lower surface) in outside relative to the upper bolster 201A groove 204A that Formation Depth is 0.65-0.85 millimeter towards the part surface (for lower surface in figure) in outside is recessed.The upper surface middle part of die shoe 201B offers lower die cavity 203B, and its shape is corresponding with the external shape of counterdie 200B, and counterdie 200B can be embedded in lower die cavity 203B regularly.The degree of depth of the lower die cavity 203B thickness slightly larger than counterdie 200B, the big 0.65-0.85 millimeter of thickness of the depth ratio counterdie 200B of lower die cavity 203B in present embodiment, therefore, after being completely embedded into by counterdie 200B in lower die cavity 203B, the part surface towards outside of counterdie 200B (for upper surface in the figure) part surface towards outside (for upper surface in figure) relative to die shoe 201B is recessed and groove 204B that Formation Depth is 0.65-0.85 millimeter.When upper mould 200A is completely embedded into and is fixed in upper mould cave 203A, after counterdie 200B is completely embedded into and is fixed in lower die cavity 204B, mould can be carried out matched moulds, it is mutually aligned by the lower surface of upper bolster 200A and the upper surface of counterdie 200B and fits each other, now upper impression 210A and lower impressions 210B can be mutually aligned and closer to each other, thus forming the overall die cavity for bar 10B forges into valve body blank 10C.Meanwhile, above-mentioned groove 204A and groove 204B forms gap M2 (shown in such as Fig. 7, Fig. 8 and Fig. 9) between the lower surface and the upper surface of counterdie 200B of upper mould 200A, it is clear that the width of this gap M2 is 1.3-1.7 millimeter.In order to ensure being accurately positioned between upper bolster 201A and die shoe 201B, the lower surface of upper bolster 201A is also convexly equipped with multiple locating dowel 202A, the upper surface of die shoe 201B offers the location hole 202B corresponding with locating dowel 202A.Being accurately positioned between upper bolster 201A and die shoe 201B is may insure that by being inserted in the hole 202B of location by locating dowel 202A.
It should be noted that, effect is better forged and pressed in order to obtain, in the method that present embodiment provides, the size of upper impression 210A and lower impressions 210B might not be completely the same with the size of valve body 10 corresponding part, but the ideal dimensions after valve body 10 is made can be a bit larger tham in a particular direction, namely leave certain surplus relative to the ideal dimensions of valve body 10.Refer to Fig. 8, if axial (namely the Y direction shown in Fig. 1) in the backflow portion 12 of valve body 10 being defined as the width of valve body 10, the axial length in backflow portion 12 is defined as the width of valve body 10, then on this width, the width of upper impression 210A and lower impressions 210B can be a bit larger tham the width of valve body 10.Concrete as it is shown in figure 5, the two ends enlarged-diameter of upper impression 210A and form wide diameter portion 230A, the two ends enlarged-diameter of lower impressions 210B and form lower wide diameter portion 230B.After mould matched moulds, upper wide diameter portion 230A and lower wide diameter portion 230B can two two places mutually involutory and form connecting portion forging and stamping chamber, the blank of blank and second pipe connecting portion 124 for forging and pressing out the first pipe connection portion 123 of valve body 10.But, on this, the axial length of wide diameter portion 230A and lower wide diameter portion 230B is not necessarily required to be equal to the axial length of the first pipe connection portion 123 and second pipe connecting portion 124, but certain surplus M1 can be had more relative to the finished product of valve body 10, namely compared with the first pipe connection portion 123 and second pipe connecting portion 124, end outside upper wide diameter portion 230A and lower wide diameter portion 230B can be provided with balance, can have more that length is M1 than the first pipe connection portion 123 and second pipe connecting portion 124 in the axial direction one section.It is appreciated that, owing to the two ends of upper impression 210A are all formed with upper wide diameter portion 230A, the two ends of lower impressions 230B are all formed with lower wide diameter portion 230B, therefore on above-mentioned width, the width ratio of upper impression 230A and lower impressions 230B make after the width of valve body 10 altogether have more the length of 2M1.In the embodiment shown in Fig. 8, the length of M1 is 1-2 millimeter.Reserve the reason of above-mentioned surplus M1, if the words that the axial length being because wide diameter portion 230A and lower wide diameter portion 230B is too short, when forging and stamping, the more difficult material guaranteeing appropriate section can be extruded and put in place and formation rule and complete shape, inside the blank of the first pipe connection portion 123 forged and pressed out and second pipe connecting portion 124, easily it is shaped like the breach of crackle, affects product yield.Above-mentioned surplus M1 is set and is contemplated to suitably increase the axial length of upper wide diameter portion 230A and lower wide diameter portion 230B so that may insure that the blank formation rule of the first pipe connection portion 123 and second pipe connecting portion 124 formed wherein during forging and stamping and complete reservation shape.
S42: at bar 10B after above-mentioned isothermal holding, puts it in the lower impressions 210B of described counterdie 200B；Locating dowel 202A is inserted in corresponding hole, location 202B, makes upper bolster 201A and upper mould 200A and die shoe 201B and counterdie 200B exactitude position, then by mould matched moulds, bar 10B is carried out disposable forging and stamping.In forging and stamping process, the valve body blank 10C that the main part of bar 10B is corresponding with valve body 10 by forging into exterior contour in upper impression 201A and lower impressions 201B.As shown in Figures 7 and 8, when bar 10B is forged into valve body blank 10C, the redundance to periphery extrusion is subject to the restriction of above-mentioned gap M2, forms the overlap 10D being looped around around valve body blank 10C.According to above-mentioned preset clearance thickness, it is clear that the thickness of this overlap 10D is 1.3-1.7 millimeter.This thickness can cushion the impulsive force between mould 200A and counterdie 200B effectively, is conducive to extending the mold use life-span, simultaneously excessive and waste material and impact forging and stamping effect without the thickness causing overlap 10D.
S5: the overlap 10D on valve body blank 10C is excised.
S6: after the operation of above-mentioned excision overlap 10D, valve body blank 10C is carried out heat treatment.In present embodiment, this heat treatment operation includes following sub-step:
S61: valve body blank 10C is quenched, the temperature of quenching is preferably 530 DEG C-560 DEG C, and the time is preferably 2-4 hour.
S62: the valve body blank 10C through quenching is carried out Ageing Treatment, and the holding temperature of Ageing Treatment is preferably 170 DEG C-200 DEG C, and the time is preferably 5-8 hour.
S7: carry out surface treatment to through above-mentioned heat treated valve body blank 10C, in present embodiment, this surface treatment includes at least one in grinding, polishing, pickling.
S8: valve body blank 10C is carried out polish, processes each perforate above-mentioned in valve body 10 on valve body blank 10C.In the present embodiment, this step S8 includes following sub-step:
S81: use profiling jig that the valve body blank 10C through above-mentioned surface treatment is gripped.Referring to Figure 10 and Figure 11, the profiling jig 300 that present embodiment adopts includes base 310, clamp assemblies 320, cylinder 330.nullClamp assemblies 320 includes fixture 321 and movable part 322，Fixture 321 and movable part 322 are block holder，And the part surface of fixture 321 is cut by line and/or the means of electric pulse processing be formed a part of exterior contour with valve body blank 10C (be specifically as follows with valve body 10 be formed with the one side that multiple arcuate projections divides，Namely a part of exterior contour that in Fig. 1, the side of the negative sense indication of X-axis is corresponding) corresponding the first clamping face 323，On the part surface of movable part 322 also by the means of line cutting and/or electric pulse processing be formed another part exterior contour with valve body blank 10C (be specifically as follows with valve body 10 be formed with the another side that multiple arcuate projections divides，Namely a part of exterior contour that in Fig. 1, the side of the forward indication of X-axis is corresponding) corresponding the second clamping face 323.During use, fixture 321 is fixed on base 310, second clamping face 324 of movable part 322 is mutually aligned by the first clamping face 323 with fixture 321, valve body blank 10C is placed between the first clamping face 323 and the second clamping face 324, makes the first clamping face 323 and the second clamping face 324 be mutually aligned with the exterior contour of corresponding part on valve body blank 10C.Afterwards, by cylinder 330, movable part 322 is promoted along the surface of base 310 to fixture 321, first clamping face 323 and the second clamping face 324 coincide with the portion of external profile of valve body blank 10C respectively, valve body blank 10C fixed clamp between fixture 321 and movable part 322, make valve body blank 10C to need the part (such as the end face of each cylindrical part on it) being machined out all expose between fixture 321 and movable part 322, in order to carry out follow-up machining simultaneously.
S82: the part being forged and pressed out by above-mentioned upper wide diameter portion 230A and lower wide diameter portion 230B to valve body blank 10C, namely the end of the blank of the blank of the first pipe connection portion 123 and second pipe connecting portion 124 carries out Milling Process, remove above-mentioned surplus M1 so that the blank of the first pipe connection portion 123 is consistent with the length of the first pipe connection portion 123 of finished product valve body 10 and second pipe connecting portion 123 with the blank length of second pipe connecting portion 124.
S83: get out on valve body blank 10C axially and each perforate (abbreviation lateral opening) that the length direction of valve body 10 is perpendicular, namely above-mentioned return flow line 121, first-class through hole 143, second through hole the 144, first fixing hole 132a, the second fixing hole 133a.The concrete processing sequence forming these lateral openings does not have specific restriction, it is possible to arbitrarily arrange according to real needs.
S84: get out axially consistent with the length direction of valve body 10 each perforate (being called for short longitudinal direction perforate) on valve body blank 10C, namely above-mentioned first installing hole the 111, second installing hole the 122, the 3rd installing hole 125, upper rod aperture 135, lower rod aperture 136, valve opening 145, valve chamber 151.In the present embodiment, concrete processing sequence is to process the first installing hole the 111, second installing hole the 122, the 3rd installing hole 125 and upper rod aperture 135 from top to bottom successively from the top of valve body blank 10C, then processes valve chamber 151, valve opening 145 and lower rod aperture 136 more from the bottom up successively from the bottom of valve body blank 10C.Certainly, in other embodiments, according to real needs, the concrete processing sequence forming such longitudinal perforate is adjustable in.The sub-step S84 of this formation longitudinal direction perforate is placed on the reason after forming the sub-step S83 of lateral opening is, longitudinal perforate is less relative to the usual internal diameter of lateral opening, structure is complex, longitudinal perforate carries out polish, and carry out polish difficulty than to lateral opening bigger, therefore it is initially formed lateral opening and forms longitudinal perforate again, it is prevented that the processing quality of established longitudinal perforate is impacted by the course of processing of lateral opening.
S85: after processing above-mentioned lateral opening and longitudinal perforate, namely complete the manufacture of valve body 10, now valve body 10 is taken off from profiling jig.
In the present embodiment, sub-step S82 completed before sub-step S83 and S84.In other embodiments, this sub-step S82 is likely to after sub-step S83 or completes after sub-step S84.
S9: air tank head 20 as above, valve rod 30, spool 40, governor motion 50 and backflow 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 assembling mode as above, thus completing the manufacture of heating power expansion valve 100.The concrete operation method assembling such parts all can refer to prior art, therefore here without repeating.
It is appreciated that other embodiments of the manufacture 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 change the shape of upper impression 210A and lower impressions 210B according to specific requirement.
In the embodiment of thermal expansion valve manufacturing method provided by the invention, by after cutting aluminium bar material or aluminium alloy bar and forming valve body blank, then valve body blank is forged and pressed and perforate and form the valve body (such as the valve body 10 of above-mentioned heating power expansion valve 100) of heating power expansion valve.Owing to valve body blank adopts forging and stamping mode to be formed, therefore required complicated shape directly can all be forged and pressed out in all directions of valve body blank, without forming bigger plane as the existing method forming valve body blank by cutting section bar in valve body blank both sides.Compared with prior art, more accurate according to the valve body profile of the produced heating power expansion valve of thermal expansion valve manufacturing method provided by the invention, and can have less volume and weight.
It should be understood that above example be merely to illustrate the present invention and and unrestricted technical scheme described in the invention, although this specification with reference to the above embodiments to present invention has been detailed description, but, it will be understood by those within the art that, the present invention still can be modified or equivalent replacement by person of ordinary skill in the field, and all are without departing from the technical scheme of the spirit and scope of the present invention and improvement thereof, all should be encompassed in scope of the presently claimed invention.

Claims (10)

1. a manufacture method for heating power expansion valve, described heating power expansion valve includes valve body, air tank head, valve rod and spool, it is characterised in that the method comprises the following steps:
Intercept one section of aluminium alloy bar with predetermined length；
Thering is provided mould, described mould includes mould and counterdie, and described upper mould offers upper impression, and described counterdie offers lower impressions；
Described bar is forged and pressed in the mold, utilizes the upper impression of described mould, with lower impressions, the main part of described bar is formed a part of exterior contour corresponding with described upper impression, the valve body blank that another part exterior contour is corresponding with described lower impressions；
Described valve body blank being carried out Drilling operation, is manufactured into the valve body of heating power expansion valve, wherein said valve body includes being the air tank head installation portion of integrative-structure, backflow portion, valve body connecting portion, flow control division and base portion；Described valve body connecting portion includes connecting portion main body, described air tank head installation portion is arranged on the side in described backflow portion, described connecting portion main body is arranged on the opposite side of the described dorsad air tank head installation portion in described backflow portion, described flow control division includes the first throughput and the second throughput, described first throughput is arranged on the side in the described dorsad backflow portion of described connecting portion main body, described base portion is arranged on the side of the described dorsad connecting portion main body of described first throughput, described second throughput is described base portion or partly extends out described base portion；Wherein said valve body offers the valve opening for fluid circulation between described first throughput and the second throughput；
Described spool is arranged on described valve inner, makes described spool be directed at described valve opening；By described valve rod through described backflow portion and described valve body connecting portion, one end of described valve rod is made to be directed at described spool；Described air tank head and described air tank head installation portion are relatively fixed, one end of described valve rod is supported or is fixed on described air tank head.
2. the method for claim 1, it is characterised in that the method is further comprising the steps of:
Before the described bar intercepted is forged and pressed, it being carried out surface treatment, described surface treatment includes deburring and cleaning；
After described bar is carried out surface treatment, described bar carrying out isothermal holding, the temperature of described isothermal holding is 400 DEG C-480 DEG C, and the time is 1.5-4 hour.
3. the method for claim 1, it is characterised in that the method is further comprising the steps of:
Before described valve body blank is carried out Drilling operation, described valve body blank is carried out heat treatment；
Carrying out surface treatment to through described heat treated valve body blank, described surface treatment includes at least one in grinding, polishing, pickling.
4. method as claimed in claim 3, it is characterised in that described heat treatment includes:
Described valve body blank is quenched, and the temperature of quenching is 530 DEG C-560 DEG C, and the time is 2-4 hour；
Described valve body blank through quenching is carried out Ageing Treatment, and the holding temperature of Ageing Treatment is 170 DEG C-200 DEG C, and the time is 5-8 hour.
5. the method for claim 1, it is characterized in that: the shape of the same side of the interior shape of described upper impression and described air tank head installation portion, backflow portion, valve body connecting portion, flow control division and base portion is mutually coincide or substantially mutually coincide, the shape of the interior shape of described lower impressions and the opposite side of described air tank head installation portion in integrative-structure, backflow portion, valve body connecting portion, flow control division and base portion is mutually coincide or substantially mutually coincide.
6. method as described in any one in claim 1-5, it is characterized in that: the shape in described air tank head installation portion and described backflow portion all substantially annular or cylindrical shape, one end of described air tank head installation portion and the subregion of side, described backflow portion are connected, and the part surface of the opposite side of the top of described connecting portion main body and the described dorsad air tank head installation portion in described backflow portion is connected；The shape of described first throughput and the second throughput is all substantially cylindrical, and the subregion of the side of described first throughput is connected with the bottom of described connecting portion main body；Described base portion generally cylindrical in shape, the subregion of the side of the described dorsad connecting portion main body of its one end and described first throughput is connected；The part of one end of described second throughput is connected with the part of first throughput one end, and another part of this end of described second throughput is connected with a part for the outer peripheral face of described base portion；Or this end of described second throughput is connected with a part for the outer peripheral face of described base portion；Axially being parallel to each other or be substantially parallel to each other of described backflow portion, the first throughput and the second throughput, and equal axially vertical or substantially vertical with described air tank head installation portion and base portion.
7. method as claimed in claim 6, it is characterised in that: two relative sidepieces that described connecting portion main body includes being connected between top and the bottom of described connecting portion main body and two relative end faces；Distance between two end faces of described connecting portion main body is less than the axial length in described backflow portion, and roughly equal with the diameter of described base portion or less than described base portion diameter；The surface in described backflow portion and the surface of described first throughput are all formed and are respectively relative to what said two side surfaces was protruded, are generally shaped like the convex surface of semi-cylindrical；Described valve body connecting portion also includes for coordinating with installed part, and described heating power expansion valve carries out the first spacing department of assembly；Described first department of assembly is generally shaped like the semicylinder being provided with through hole, or the radial section of the first department of assembly be generally shaped like C shape or V-arrangement；Described first department of assembly is convexly equipped at least one described sidepiece of described connecting portion main body, and axially axially in parallel or almost parallel with described backflow portion, the first throughput and the second throughput of described first department of assembly；Described valve body connecting portion also includes for coordinating with installed part, and described heating power expansion valve carries out the second spacing department of assembly；The external shape substantially cylindrical of described second department of assembly, outwardly from the side of described valve body, it is axially in parallel or almost parallel with described backflow portion axially, and described second department of assembly is provided with the screw connection structure of non through hole.
8. method as described in any one in claim 1-5, it is characterised in that described method is further comprising the steps of:
When by described mould matched moulds, reserve, on described, the gap that width is 1.3-1.7 millimeter between mould and described counterdie；
Described bar is being forged and pressed in the mold, it is corresponding with described upper impression that the main part of described bar is formed a part of exterior contour with lower impressions by the upper impression utilizing described mould, while the valve body blank that another part exterior contour is corresponding with described lower impressions, make the redundance of described bar be squeezed into described gap and forge into the overlap that is connected to described valve body blank periphery；
Before described valve body blank is carried out Drilling operation, excise described overlap.
9. method as described in any one in claim 1-5, it is characterized in that: described valve body includes backflow portion, described backflow portion generally cylindrical in shape, it is axially vertical or substantially vertical with the length direction of described valve body, and the external diameter at the two ends in described backflow portion and internal diameter expand, form the first pipe connection portion and second pipe connecting portion respectively at the two ends in described backflow portion；The two ends of described upper impression are formed with wide diameter portion, and the two ends of described lower impressions are formed with lower wide diameter portion, the axial length 1-2 millimeter longer than the axial length of described first pipe connection portion or described second pipe connecting portion of described upper wide diameter portion and described lower wide diameter portion；Described method is further comprising the steps of:
When by mould on described with counterdie matched moulds, make described upper wide diameter portion and described lower wide diameter portion be combined to form connecting portion forging and stamping chamber, a part for described bar is forged and pressed in chamber at described connecting portion and forges into the blank of described first pipe connection portion and the blank of described second pipe connecting portion；
The end of the blank of described first pipe connection portion and the blank of second pipe connecting portion is carried out Milling Process so that the blank of described first pipe connection portion is consistent with the length of described first pipe connection portion and second pipe connecting portion with the length of the blank of second pipe connecting portion.
10. method as described in any one in claim 1-5, it is characterised in that: described described valve body blank being carried out Drilling operation, the step of the valve body with valve opening being manufactured into heating power expansion valve includes following sub-step:
Profiling jig is provided, described profiling jig includes fixture and movable part, the part surface of described fixture is cut by line and/or the means of electric pulse processing are formed with first clamping face corresponding with a part of exterior contour of described valve body blank, the part surface of described movable part is cut by line and/or the means of electric pulse processing form second clamping face corresponding with another part exterior contour of described valve body blank；
Described valve body blank is placed between described first clamping face and the second clamping face, drives described movable part towards described fixture one end, use described first clamping face and the second clamping face to clamp and fix described valve body blank；
Described valve body blank gets out the perforate that the length direction of axial and described valve body is perpendicular；
Described valve body blank gets out the perforate that the length direction of axial and described valve body is consistent.
CN201410740909.0A 2014-12-08 2014-12-08 Thermal expansion valve manufacturing method Active CN105736745B (en)

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Citations (5)

* 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
JP2008014628A (en) * 2006-07-07 2008-01-24 Zhejiang Sanhua Refrigerating Group Co Ltd Temperature expansion valve
CN103016830A (en) * 2011-09-28 2013-04-03 杭州三花研究院有限公司 Thermal expansion valve

Patent Citations (5)

* 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
JP2008014628A (en) * 2006-07-07 2008-01-24 Zhejiang Sanhua Refrigerating Group Co Ltd Temperature 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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