CN1846892A - High temperature and very high water pressure once forming technology, method and equipment inside internally heating metal container - Google Patents
High temperature and very high water pressure once forming technology, method and equipment inside internally heating metal container Download PDFInfo
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- CN1846892A CN1846892A CNA2005100899475A CN200510089947A CN1846892A CN 1846892 A CN1846892 A CN 1846892A CN A2005100899475 A CNA2005100899475 A CN A2005100899475A CN 200510089947 A CN200510089947 A CN 200510089947A CN 1846892 A CN1846892 A CN 1846892A
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Abstract
The present invention is high temperature and high pressure water pressure forming technology, method and equipment. High inner pressure of water produced at high temperature is utilized to form necked metal container. The forming equipment consists of four parts: high temperature and high pressure equipment comprising high pressure container, built-in high temperature electric heater and water as work medium; temperature conducting equipment comprising high pressure metal pipeline and high pressure valve; forming equipment comprising concave mold, medium temperature preheater, container blank and sealing stopper; and controller. The forming method may be one pressure conducting method to conduct the high inner pressure to the container blank for expanding the blank wall or one heat conducting method to conduct the high temperature to the container blank for heating water to produce high inner pressure for expanding. The present invention may be used in forming various kinds of high strength necked metal container.
Description
1. technical field:
The present invention relates to the container-like metal parts water pressure once shaping technology of a kind of brand-new reducing, method and apparatus.Concrete, this technology of huge static pressure and the relevant device that utilize water at high temperature to be produced exactly carry out the once-forming of the container-like metal parts of reducing.
Required inner high voltage derives from the huge static pressure that high-temperature water produces in the forming process, and shaping medium is superhigh-pressure high-temp water (supercritical water), and metal stock is to be shaped under the condition of high temperature.
2. background technology
Usually said hydroforming (internal high pressure forming) at present is to be source pressure with hydraulic pump (water pump or oil pump), normal temperature fluid (water or oil) is a shaping medium, make blank with tubing, apply highly pressurised liquid by tubing inside and pipe is pressed into makes it be configured as required workpiece in the die cavity.Specifically metal blank is put into the die cavity of a hydroforming assembly and provided high-pressure fluid to blank inside, so that the outside expansion of blank is consistent with the qualification cavity surface with hydraulic pump.Shortcoming of the method and limitation: 1. cost is higher, needs a high-performance high-pressure hydraulic pump; 2. operating pressure is relatively low, and maximum working pressure is generally about 0.3-0.5GPa; 3. it is comparatively difficult to boost, and for common hydraulic pump, if will promote 0.1GPa again on the basis of working pressure range, specification requirement is very high, and usually comparatively difficult; 4. the metal parts outer surface of being processed is easy to generate fan-shaped microfissure, because metal blank is a dilatancy under the low temperature rigid state; 5. process high duty metal parts (as titanium alloy etc.) and be restricted, because of being processes under low-temperature condition; 6. process the thick-walled metal material components and be restricted, because of being processes under low-temperature condition.
3. summary of the invention
The present invention is in a kind of inside internally heating metal container-high temperature ultra high water pressure once shaping technology, method and apparatus.The present invention is this technology of huge static pressure and the relevant device that utilizes water at high temperature to be produced, carry out the once-forming of the container-like metal parts of reducing, mode of heating heats the working water in the high-pressure bottle in wherein adopting, and makes it produce the required inner high voltage of expansion vessel metal blank wall.The present invention is the residing state of metal from pressure mechanism of production, shaping medium, forming process no matter, and still all different with the hydroforming technology and equipment of present routine from the element of installation, it is a kind of brand-new technology, method and apparatus.
It is that transmission medium superhigh-pressure high-temp thermal simulation experiment result proposes with water that the present invention is based on the p-V-T graph of a relation of state equation, water of water and following two groups: 1. the external diameter with topped up with water (about 6-7 drips) is 48mm, internal diameter is 8mm, boss ratio is that 1: 6 Rene41 titanium maxter alloy autoclave is sealed by the taper chock plug, put into the tube furnace by temperature controller control then, Jia Re mode heats up gradually by pre-set program in addition.When furnace temperature rises to 350 ℃, find to make the outside also breach (seeing Figure 1B-1) of explosion long 27mm, a wide 11mm that expands of this titanium maxter alloy autoclave body by the huge inner high voltage that high-temperature water produced of kettle inside; 2. same experimental technique, with the external diameter of topped up with water (about 8-9 drips) is 60mm, and internal diameter is 8mm, and boss ratio is that two stainless steel autoclave bodies of 1: 7.5 are sealed by the taper chock plug, put into tube furnace then, Jia Re mode heats up gradually by the program that pre-sets in addition.When furnace temperature rises to 450 ℃ and 480 ℃, cause two stainless steel autoclave bodies all outwards to expand by the huge inner high voltage that high-temperature water produced of autoclave inside, the 60mm of kettle external diameter before by experiment dilatancy respectively is 63.1mm and 64.3mm (seeing Figure 1B-2).This phenomenon by we utilize aqueous medium at high temperature the huge static pressure of generation, the once-forming that carries out the container-like metal parts of reducing provides foundation.
A content of the present invention is a kind of huge static pressure of utilizing water at high temperature to be produced, the technology of a container-like metal parts of hydroforming reducing (seeing Fig. 2 A).Its characteristics are that inner high voltage required in the forming process derives from the immense pressure that water is at high temperature produced.The p-V-T relation of water is the basic physical chemical property of water, and the density of water changes and changes along with temperature and pressure, and when increased pressure, the density of fluid can change to the density value of liquid water continuously from the density value of steam.At high temperature, during as 200 ℃, 500 ℃ and 1000 ℃, keep the density (1g/cm of water under the normal temperature and pressure
3), required external pressure will reach 0.3GPa, 0.8GPa, 1.82GPa respectively.In other words, the canister of water-filled (or packing density is 100%) sealing is heated to 200 ℃, 500 ℃ and 1000 ℃ respectively, high-temperature water in the container will produce the pressure of about 0.3GPa, 0.8GPa, 1.82GPa, and stepless action in around on the chamber wall (seeing Figure 1A).We utilize this characteristic of water to carry out the once-forming of the container-like metal parts of reducing just.Be about to be full of the canister blank of water or the certain water gaging of filling, sealed, then by the water in the heat conducting mode indirect container blank to high temperature.Rising along with water temperature, increase sharply by the pressure that high-temperature water produced in the container blank, when the pressure that is produced by hot operation water surpasses the tension force that container blank wall can bear, the wall of expansion vessel blank, this moment is if controlled with female mold, just obtains the various container-like metal parts of reducing (seeing Fig. 2 A and 2B) that not only had formalness but also had the double-form of external morphology.Water at high temperature can produce the huge inner high voltage that is used for the expansion vessel blank can be from above-mentioned two groups of high temperature and pressure experiments be confirmed (seeing Figure 1B-1, Figure 1B-2).
Second content of the present invention relates to a kind of interior heating and produces the technology and the assembly (seeing Fig. 4 A and 4B) of the required inner high voltage of the container-like metal parts of shaping reducing.Be characterized in the high-temperature electric heat element is placed high-pressure bottle inside, directly the working water in the high-pressure bottle heated internally, make it produce needed inner high voltage in the forming process.Simultaneously, that the high-pressure bottle outer wall is wound with is square (or circular) copper pipe cooling water circulating device, to improve the tensile strength of high-pressure bottle outer wall, and then the operating temperature and the operating pressure of working water in the raising high-pressure bottle, the pressure scope of application of expansion equipment provides expansion thick-walled metal material, the required inner high voltage of high-strength metal material.
Interior heating technique comprises cooling technology two parts of inner built-in electrothermal high-temperature stove heating technique of high-pressure bottle and container outer wall.Its assembly mainly is made up of high-pressure bottle, working water, built-in electrothermal high-temperature stove, cooling water circulating device four parts.
The 3rd content of the present invention relates to a kind of built-in electrothermal high-temperature furnace module.Be characterized in the electrothermal high-temperature stove is placed high-pressure bottle inside, directly the working water in the high-pressure bottle heated internally, so that produce required interior super-pressure in the forming process.This assembly comprises high-temperature electric heat element (2-1), insulating coating (2-2), the metal coating housing (2-3) of heating outside and plain conductor four parts (seeing Fig. 4 A) of wrapping up in insulating barrier outward.
In add the sealing that thermal design should guarantee the high-pressure bottle under high pressure (super-pressure) working environment, guarantee that again heating and plain conductor are in heating process and the insulating properties between working water and the high-pressure bottle wall.Therefore, must scribble resistant to elevated temperatures insulating materials at heating and plain conductor outside.
Heating adopts silicon carbide rod (operating temperature is 1000-1350 ℃), or silication molybdenum bar (operating temperature 1350-1600 ℃ is up to 1800 ℃).Before using silicon carbide rod and silication molybdenum bar are at high temperature carried out sintering; make silicon carbide rod and silication molybdenum bar outer surface produce thicker high temperature resistant siliceous insulation and the antioxidation coating of one deck; be wrapped in silicon carbide rod and silication molybdenum bar high-temperature electric heat outside elements with resistant to elevated temperatures metal shell then; thereby avoid heating directly to contact with high-temperature water; with the siliceous insulating barrier of protection silicon carbide rod and silication molybdenum bar outer surface, prolong the service life of high-temperature electric heat element.
The high-temperature electric heat element is welded on the high-pressure bottle wall together with the metal coating housing of outside; or be fixed on the high-pressure bottle wall by the conical surface-conical surface or the conical surface-sphere with the spiral shell tool; and high-temperature electric heat element and temperature thermocouple are drawn with the plain conductor that is coated with insulating coating outward; link to each other with temperature controller with external power supply, will guarantee that simultaneously high-pressure bottle under high pressure has good sealing property.The high-temperature electric heat element both can place on the high-pressure bottle sidewall (sees Fig. 4 A), also can place on the high-pressure bottle base wall and (see Fig. 4 B), and this will be determined on a case-by-case basis.
The 4th content of the present invention relate to a kind of with the working water in the heat conducting mode indirect container blank cavity to high temperature, produce the technology and the assembly (see figure 5) of expansion vessel blank wall and the required inner high voltage of the container-like metal parts of once-forming reducing.
Its characteristics are, at first with topped up with water all in high-pressure bottle and the canister blank, working water in adopting then in the mode of heating heating high-pressure container is to high temperature, with the hot operation water in the high-pressure bottle is thermal source, utilize in the high-pressure bottle in the high-temperature water and metal stock in-temperature difference between the water at low temperature, by connecting the high-pressure metal pipeline between high-pressure bottle and the metal blank, in heat conducting mode, the high temperature of hot operation water in the high-pressure bottle is transmitted in the container blank cavity water, water in the indirect metal stock cavity makes it produce the technology of expansion vessel blank wall and the required inner high voltage of the container-like metal parts of once-forming reducing to high temperature.
Present technique mainly comprises high-pressure bottle, built-in electrothermal high-temperature stove, high-pressure metal pipeline, canister blank and five basic modules of working water.
The 5th content of the present invention relates to a kind of mode with the pressure conduction directly provides expansion vessel blank wall, and the technology of the required inner high voltage of the container-like metal parts of once-forming reducing and assembly (seeing Fig. 6 A, 6B, 6C, 6D and 6E).
Be characterized in, at first with topped up with water in the high-pressure bottle, then by the working water in the interior mode of heating heating high-pressure container to high temperature, when the inner high voltage that is produced by hot operation water (supercritical water) reaches predetermined pressure, open the high pressure valve between high-pressure bottle and the metal stock, the huge inner high voltage that is produced by hot operation water in the high-pressure bottle is transmitted in the cavity of container blank via the high-pressure metal pipeline like this, the wall of expansion vessel blank makes its distortion, until the outer surface of the container blank technology with the surperficial basically identical of mould inner mould.
Present technique mainly comprises high-pressure bottle, built-in electrothermal high-temperature stove, high-pressure metal pipeline, high-pressure stop valve, canister blank and six basic modules of working water.
The 6th content of the present invention relates to the pre-warmed technology of a kind of canister blank.It is characterized in that at mould outside cover one moderate oven, and the canister blank in the die cavity is carried out pre-warmed technology (Fig. 4 A) through mould.Its effect one is to make metal blank (no matter heat is conducted or the pressure conduction) dilatancy under hot state; The 2nd, reduce the loss of heat in the container blank in the heat transfer process, shorten the required time of once-forming.
The 7th content of the present invention is in the inside internally heating metal container-the high temperature ultra high water pressure once former.This equipment comprises four most of 18 basic modules (seeing Fig. 4 A).First is high-temperature high-pressure apparatus (pressure source), comprises high-pressure bottle (1), built-in electrothermal high-temperature stove (2), working water (4), cooling water circulating device (3); Second portion is temperature (or pressure) transmission equipment: comprise high-pressure metal pipeline (5) and muff (6), high pressure valve (7); Third part is a former, comprises female mold (12), middle temperature preheating furnace (13) and furnace shell (14), mould fixed support (16), canister blank (11), canister blank support (9), sealing plug (8), metal ferrules (10); The 4th part is a control appliance, comprises temperature controller (2,17), mould open/close and mobile control device (15,18).
Equipment characteristic: the working water in 1. adopting in the mode heating high-pressure container of heating, make it produce needed inner high voltage in the forming process, be about to the high-temperature electric heat element and place high-pressure bottle inside, high temperature furnace directly heats the water in the container internally; 2. pressure source (high-pressure bottle and high temperature furnace) is placed apart with mould, and mould both can use high temperature resistant, high strength ceramic material mould, also can use metal material mould (as the stainless steel material mould); 3. adopt pressure conduction or heat conducting mode, provide expansion vessel shape metal stock required inner high voltage indirectly.Required inner high voltage is to be produced by the high-temperature water in the high-pressure bottle (supercritical water) in the forming process, and is transmitted in the metal blank cavity via the high-pressure metal pipeline; 4. the high-pressure bottle outer wall is wound with square (or circular) copper pipe cooling water circulating device, with the tensile strength of raising high-pressure bottle, so that the operating temperature and the operating pressure of raising working water, the range of work of enlarged metal material and container wall thickness; 5. the outside of female mold is with a moderate oven, so that metal blank is preheated; 6. high-pressure bottle tensile strength height, the operating temperature of working water is high and operating pressure is big, but the Seals for High Pressure Containers difficulty is bigger; 7. this equipment not only can processing thin-walled, low intensive metal material (as copper, aluminium alloy etc.), the heavy wall that also can be shaped, high-strength metal material (as titanium alloy, carbon steel, and stainless steel etc.); 8. this equipment not only can be processed as the container-like metal parts of the simple reducing of form such as circular, oval, square, also can be shaped as the complicated container-like metal parts (see figure 3) of reducing of forms such as beading.
The 8th content of the present invention relates in a kind of pressure conduction inside internally heating metal container-the high temperature ultra high water pressure once manufacturing process
Be characterized in, utilize the inner high voltage that is produced by hot operation water in the high-pressure bottle, via the high-pressure metal pipeline inner high voltage is delivered in the container blank cavity, expanding metal container blank wall and the required inner high voltage of the container-like metal parts of once-forming reducing directly are provided.Concrete steps (seeing Fig. 6 A, 6B, 6C, 6D and 6E) are as follows:
1. at first metal blank is prefabricated into the uniform tubular of wall thickness (container-like) metal stock; 2. with topped up with water in the high-pressure bottle; 3. with there being the chock plug of axially extending bore that container blank openend is sealed, the other end of chock plug then links to each other chock plug with the high-pressure metal pipeline with high-pressure bottle; 4. place the female mould cavities of overcoat moderate oven to preheat metal blank with support to the temperature of setting; 5. open the built-in electrothermal high-temperature stove of high-pressure bottle inside and the cooling water circulating device of chamber wall outside, the working water in adopting in the mode heating high-pressure container of heating is to the temperature of setting; 6. when the inner high voltage that is produced by high-temperature water (supercritical water) in the high-pressure bottle reaches predetermined pressure, open high pressure valve, the huge inner high voltage that is produced by hot operation water (supercritical water) in the high-pressure bottle is transmitted in the cavity of container blank by the high-pressure metal pipeline like this, the wall of expansion vessel blank makes its distortion, until container blank wall outer surface and mould inner mould surface basically identical; 7. close high pressure valve, open mould and chock plug, so just obtain the various container-like metal parts of double-form reducing that not only had formalness but also had external morphology.
The 9th content of the present invention relates in a kind of heat conduction inside internally heating metal container-the high temperature ultra high water pressure once manufacturing process
Be characterized in, working water at first adopting in the mode of heating heating high-pressure container is to high temperature, then by the high-pressure metal pipeline, the high temperature of hot operation water in the high-pressure bottle is delivered in the metal stock cavity water, to high temperature, produce expansion vessel blank wall and the required inner high voltage (see figure 5) of the container-like metal parts of once-forming reducing with the water in the heat conducting mode indirect metal stock cavity.Concrete steps are as follows:
1. at first metal blank is prefabricated into the uniform tubular of wall thickness (container-like) metal stock; 2. be with topped up with water in the high-pressure bottle, also topped up with water in the cavity of container blank; 3. with there being the chock plug of axially extending bore that container blank openend is sealed, the other end of chock plug then links to each other chock plug with the high-pressure metal pipeline with high-pressure bottle; 4. place the female mould cavities of overcoat moderate oven to preheat metal blank with support to the temperature of setting; 5. open the built-in electrothermal high-temperature stove of high-pressure bottle inside and the cooling water circulating device of chamber wall outside, the working water in adopting in the mode heating high-pressure container of heating is to the temperature of setting, and the high temperature furnace operating temperature will be far above the operating temperature of moderate oven; 6. the high temperature that is produced by hot operation water in the high-pressure bottle is transmitted in the container blank cavity water by the high-pressure metal pipeline, water in the indirect metal blank cavity is to high temperature, when the pressure that is produced when this high-temperature water (supercritical water) surpasses the tension force that container blank wall can bear, the wall of expansion vessel blank makes its distortion, until its outer surface and mould inner mould surface basically identical; 7. stop heating, the extremely safe temperature of metal parts that reduces furnace temperature and processed; 8. open mould and chock plug, so just obtain the container-like metal parts of various reducings.
For the reducing metal parts, conventional fabrication processes is generally and strikes out 2 half sheets of shape earlier and be welded into integrated member again.Compare with the punching press welding procedure, the major advantage that HTHP fluid power is shaped is to alleviate quality, economical with materials; Reduce the quantity of part and mould, reduced die cost and production cost; The intensity and the rigidity of product have been improved.
The present invention is the residing state of metal from pressure mechanism of production, shaping medium, forming process no matter, and still all different with at present traditional hydroforming technology and equipment from the element of installation, it is a kind of brand-new technology and method.This method with the difference of conventional hydroforming maximum is: 1. pressure mechanism of production (or source pressure) is different.The mechanical pressure of source pressure in hydraulic pump in the conventional hydroforming process, and the huge static pressure that the source pressure in this method is at high temperature produced in water itself; 2. shaping medium difference.The conventional hydraulic shaping medium is normal temperature liquid (water or an oil), and the shaping medium among the present invention is superhigh-pressure high-temp water (being supercritical water), but not traditional liquid; 3. the residing state difference of metal stock in the forming process, metal stock is a dilatancy under the low temperature rigid state in the common hydroforming process, and metal stock is a dilatancy under the high-temp plastic state in this method; 4. former assembly that is caused thus and processing method are also different.
In addition, compare with traditional hydroforming, the present invention has following several respects advantage: 1. cost is lower, and the capital equipment assembly is high-pressure bottle, electrothermal high-temperature stove, mould; 2. the working pressure wide ranges can vary continuously to 1.2 ten thousand atmospheric pressure from tens atmospheric pressure always, even higher; 3. supercharging is very easy to, and by the heat conduction of high-pressure metal pipeline, as long as the temperature of the working water in the metal stock reaches 200 ℃, 500 ℃, 1000 ℃, this high-temperature water just can produce the inner high voltage up to 300MPa, 800MPa and 1800MPa; 4. institute's processing component wall quality is even, because metal blank is to expand a kind of being bordering under the mecystasis, i.e. and plastic deformation, so as long as condition is calculated and control is suitable, the metal parts outer wall is owing to the microfissure that is produced that expands just can be avoided; 5. can process such as the difficult metal parts that is shaped such as titanium alloy, high strength steel, because of being is shaped under the elevated temperature heat state; 6. can process the container-like metal parts of reducing of heavy wall, because of being is shaped under the elevated temperature heat state.
Compare with other HTHP hydroforming method, because the working water in adopting in this method in the mode heating high-pressure container of heating is to high temperature, and the high-pressure bottle outer wall is wound with cooling water circulating device, therefore the tensile strength of high-pressure bottle wall significantly improves, thereby make the working water temperature, and, can provide expansion thick-walled metal material, the required super-pressure of high-strength metal material by the also significantly raising of pressure that high-temperature water (supercritical water) is produced.
4. description of drawings
Figure 1A is at high temperature produced the immense pressure schematic diagram by water
The canister that will be full of the sealing of water (being that packing density is 100%) is heated to 200 ℃, 500 ℃ and 1000 ℃ respectively, and the water in the container will produce the inner high voltage of nearly 200MPa, 800MPa, 1800MPa.
Figure 1B-1 titanium, molybdenum alloy autoclave expand and rupture diagram (A) under the inner high voltage effect that 350 ℃ of high-temperature water produce
Kettle wall thickness and boss ratio (external diameter 48mm, internal diameter 8mm, boss ratio 1: 6) are (B)
Figure 1B-2 stainless steel autoclave is expansion plans (A) under the inner high voltage effect that 480 ℃ of high-temperature water produce
Kettle wall thickness and boss ratio (external diameter 60mm, internal diameter 8mm, boss ratio 1: 7.5) are (B)
Fig. 2 A is a metal container high temperature ultrahigh-pressure hydraulic once shaping technology schematic diagram of the present invention;
The container-like metal parts a-of the immense pressure once-forming reducing normal temperature that utilizes water at high temperature to be produced is not out of shape; B-low temperature initial bubble; Warm medium expansion among the c-; The complete expansion of d-high temperature.
Fig. 2 B is a metal container high temperature ultrahigh-pressure hydraulic once-forming step schematic diagram of the present invention;
A-adds water; The b-sealing; The c-heating; D-expands.
The container-like metal parts product of Fig. 3 part reducing schematic diagram
The a-ellipse; The b-circle; C-is square; D-beading shape.
Fig. 4 A adds in of the present invention to pine for-HTHP canister fluid power once-forming equipment and main member schematic diagram (the electrothermal high-temperature stove places on the high-pressure bottle sidewall)
The 1-high-pressure bottle; The built-in electrothermal high-temperature stove of 2-(21-high-temperature electric heat element; The 22-insulating coating; The metal coating housing of 23-heating outside); The 3-cooling water circulating device; The 4-working water; 5-high-pressure metal pipeline; The 6-muff; The 7-high pressure valve; The 8-sealing plug; 9-canister blank support; The 10-metal ferrules; 11-container blank; The 12-female mold; Warm preheating furnace among the 13-; The 14-furnace shell; The 16-mould rack; The 17-temperature controller; 18-mould open/close and mobile control device.
Fig. 4 B is of the present invention to be placed the electrothermal high-temperature stove to add in the high-pressure bottle bottom and pines for-HTHP canister fluid power once-forming equipment schematic diagram
Fig. 5 adds in the heat conduction of the present invention to pine for-HTHP canister fluid power once-forming schematic diagram
With topped up with water all in high-pressure bottle and the container blank cavity, adopt water in the heat conducting mode heating container blank to high temperature, make it produce expansion capacity wall and form the required inner high voltage of the container-like metal parts of reducing.
In the conduction of Fig. 6 A pressure-HTHP canister fluid power once-forming step schematic diagram,
The metal blank preprocessing is become wall thickness container-like uniformly (or tubular) metal stock; With topped up with water in the high-pressure bottle.
In the conduction of Fig. 6 B pressure-HTHP canister fluid power once-forming step schematic diagram is used has the taper chock plug of axially extending bore that container blank openend is sealed; The container blank of sealing is placed on the container blank support, and place in the die cavity of overcoat moderate oven descending patrix; Utilize moderate oven that the container blank is preheated.The canister blank is in not deformation state of low temperature among the figure.
In Fig. 6 C pressure conduction-HTHP canister fluid power once-forming step schematic diagram opens the built-in electrothermal high-temperature stove of high-pressure bottle inside, working water in the temperature programming high-pressure bottle is to the temperature of setting, make it produce required inner high voltage in the forming process, when acquiring a certain degree by the pressure that high-temperature water produced in the high-pressure bottle, open high pressure valve, provide the expansion vessel blank needed inner high voltage.The canister blank is in the initial bubble state among the figure.
In Fig. 6 D pressure conduction-HTHP canister fluid power once-forming step schematic diagram is along with the operating temperature and the operating pressure of working water in the high-pressure bottle further raise, the wall of container blank continues dilatancy, until its outer surface and female mold internal mold surface basically identical.Metal blank is in high temperature complete expansion state among the figure.
In Fig. 6 E pressure conduction-HTHP canister fluid power once-forming step schematic diagram closes high pressure valve, stop in canister blank cavity, providing pressure, when the metal parts of being processed is reduced to safe temperature, open mould and take out the container-like metal parts of being processed of reducing.
5. detailed description of preferred embodiment
The field that this method and technology are suitable for is very wide, it not only can be used for automobile (motorcycle) industry, mechanical industry, light industry, also can be used for naval vessel industry (especially submarine), aircraft industry, aerospace industry (as all kinds of missile airframes, airship return capsule etc.) and weapon industry etc.
This is a preferred embodiment with oval (or circular) container-like metal parts of reducing temporarily, described in specific implementation method and procedure of processing such as Fig. 6 A-6E.
Claims (12)
1. huge static pressure of utilizing water at high temperature to be produced, the technology of a container-like metal parts of hydroforming reducing.The present invention is based on the state equation of water, p-V-T graph of a relation and following two groups of superhigh-pressure high-temp thermal simulation experiment results of water.
Its technical characterstic is that inner high voltage required in the forming process derives from the immense pressure that water is at high temperature produced.According to the p-V-T graph of a relation of water and the state equation of water, the density of water changes and changes along with temperature and pressure, and when increased pressure, the density of fluid can change to the density value of liquid water continuously from the density value of steam.At high temperature, during as 200 ℃, 500 ℃ and 1000 ℃, keep the density (1g/cm of water under the normal temperature and pressure
3), required external pressure will reach 0.3GPa, 0.8GPa, 1.82GPa respectively.In other words, the canister of water-filled (being that packing density is 100%) sealing is heated to 200 ℃, 500 ℃ and 1000 ℃ respectively, high-temperature water in the container will produce the inner high voltage of about 0.3GPa, 0.8GPa, 1.82GPa, and stepless action in around on the chamber wall.We utilize this characteristic of water to carry out the once-forming of the container-like metal parts of reducing just.Promptly utilize working water in the heat conducting mode indirect canister blank to high temperature; Rising along with water temperature, also increase sharply by the pressure that high-temperature water produced in the container blank, when pressure that high-temperature water produced surpasses the tension force that chamber wall can bear, the wall of expansion vessel blank makes its distortion, this moment is if controlled with female mold, just obtains the various container-like metal parts of reducing that not only had formalness but also had the double-form of external morphology.Water at high temperature can produce the huge inner high voltage that is used for the expansion vessel blank and can be confirmed from following two groups of high temperature and pressure experiments.
One group is that external diameter with topped up with water (about 6-7 drips) is 48mm, internal diameter is 8mm, boss ratio is that 1: 6 Rene41 titanium maxter alloy autoclave is sealed by the taper chock plug, puts into the tube furnace by temperature controller control then, and Jia Re mode heats up gradually by pre-set program in addition.When furnace temperature rises to 350 ℃, find to make the outside also breach of explosion long 27mm, a wide 11mm that expands of this titanium maxter alloy autoclave body by the huge inner high voltage that high-temperature water produced of kettle inside; Second group of experimental technique is identical with first group, the external diameter that is about to topped up with water (about 8-9 drips) is 60mm, internal diameter is 8mm, boss ratio is that two stainless steel autoclave bodies of 1: 7.5 are sealed by the taper chock plug, put into tube furnace then, Jia Re mode heats up gradually by the program that pre-sets in addition.When furnace temperature rises to 450 ℃ and 480 ℃, cause two stainless steel autoclave bodies all outwards to expand by the huge inner high voltage that high-temperature water produced of autoclave inside, the 60mm of kettle external diameter before by experiment dilatancy respectively is 63.1mm and 64.3mm.This phenomenon by we utilize aqueous medium at high temperature the huge static pressure of generation, the once-forming that carries out the container-like metal parts of reducing provides foundation.
The present invention and at present conventional hydroforming maximum different have 3 points: 1. pressure mechanism of production (or source pressure) difference.The mechanical pressure of source pressure in hydraulic pump in the conventional hydroforming process, and the inner high voltage among the present invention derives from the huge static pressure that water itself is at high temperature produced in the high-pressure bottle; 2. shaping medium difference.Shaping medium in the conventional hydroforming process is normal temperature liquid (water or an oil), and the shaping medium among the present invention is superhigh-pressure high-temp water (supercritical water), but not traditional liquid; 3. the residing state difference of metal stock in the forming process.Metal material is a dilatancy under the low temperature rigid state in the conventional hydroforming process, and metal stock is to be bordering on dilatancy under the state of plasticity at high temperature among the present invention; 4. former assembly that is caused thus and processing method are also different.Conventional hydraulic forming equipment mainly is made up of hydraulic pump, mould and metal stock, and present device mainly comprises high-temperature high-pressure apparatus (high-pressure bottle+built-in electrothermal high-temperature stove+cooling water circulating device) (inner high voltage generation equipment), former (metal material mould+middle temperature preheating furnace) and heat conduction (or pressure conduction) equipment (high-pressure metal pipeline+muff).
2. one kind places high-pressure bottle inside with high temperature furnace, from internal tank directly the working water the high-pressure bottle is heated and produce in the technology and the assembly of super-pressure.It is characterized in that the high-temperature electric heat element being placed high-pressure bottle inside and contacting, directly the working water the high-pressure bottle is heated, make it produce required inner high voltage in forming process from internal tank with working water.Simultaneously, that the high-pressure bottle outer wall is wound with is square (or circular) copper pipe cooling water circulating device, to reduce the temperature of high-pressure bottle outer wall, improve the tensile strength of container outer wall, and then the operating temperature and the operating pressure of raising working water, enlarge the pressure scope of application of this equipment, provide expansion heavy wall and high-strength metal material required inner high voltage.
Interior heating technique comprises cooling technology two parts of inner built-in electrothermal high-temperature stove heating technique of high-pressure bottle and container outer wall.Its assembly mainly is made up of high-pressure bottle, working water, built-in electrothermal high-temperature stove, cooling water circulating device four parts.
Its characteristics: during internally heated pressure vessel work, electric furnace is at internal tank, though the container intracavity temperature is quite high, but outside cold water cooling with circulation, still has higher tensile strength, this intensity that is equivalent to the high-pressure bottle wall increases from inside to outside gradually, so interior heating container can worked than adding under the high temperature and pressure that manys of thermal capacitance device.
3. built-in electrothermal high-temperature furnace module.Be characterized in the electrothermal high-temperature stove is placed high-pressure bottle inside, directly the working water in the high-pressure bottle heated internally, so that produce required interior super-pressure in the forming process.This assembly comprises high-temperature electric heat element (2-1), insulating coating (2-2), the metal coating housing (2-3) of heating outside and plain conductor four parts of wrapping up in insulating barrier outward
In add the sealing that thermal design should guarantee the high-pressure bottle under high pressure (super-pressure) working environment, guarantee that again heating and plain conductor are in heating process and the insulating properties between working water and the high-pressure bottle wall.Therefore, must scribble resistant to elevated temperatures insulating materials at heating and plain conductor outside.
Heating adopts silicon carbide rod (operating temperature is 1000-1350 ℃), or silication molybdenum bar (operating temperature 1350-1600 ℃ is up to 1800 ℃).Before using silicon carbide rod and silication molybdenum bar are at high temperature carried out sintering; make silicon carbide rod and silication molybdenum bar outer surface produce thicker high temperature resistant siliceous insulation and the antioxidation coating of one deck; be wrapped in silicon carbide rod and silication molybdenum bar high-temperature electric heat outside elements with resistant to elevated temperatures metal shell then; thereby avoid heating directly to contact with high-temperature water; with the siliceous insulating barrier of protection silicon carbide rod and silication molybdenum bar outer surface, prolong the service life of high-temperature electric heat element.
The high-temperature electric heat element is welded on the high-pressure bottle wall together with the metal coating housing of outside; or be fixed on the high-pressure bottle wall by the conical surface-conical surface or the conical surface-sphere with the spiral shell tool; and high-temperature electric heat element and temperature thermocouple are drawn with the plain conductor that is coated with insulating coating outward; link to each other with temperature controller with external power supply, will guarantee that simultaneously high-pressure bottle under high pressure has good sealing property.
One kind with the working water in the heat conducting mode indirect container blank cavity to high temperature, produce the technology and the assembly of expansion vessel blank wall and the required inner high voltage of the container-like metal parts of once-forming reducing.
It is characterized by, at first with topped up with water all in high-pressure bottle and the canister blank, working water in adopting then in the mode of heating heating high-pressure container is to high temperature, with the hot operation water in the high-pressure bottle is thermal source, utilize in the high-pressure bottle in the high-temperature water and metal stock in-temperature difference between the water at low temperature, by connecting the high-pressure metal pipeline between high-pressure bottle and the metal blank, in heat conducting mode, the high temperature of hot operation water in the high-pressure bottle is transmitted in the container blank cavity water, water in the indirect metal stock cavity makes it produce the technology of expansion vessel blank wall and the required inner high voltage of the container-like metal parts of once-forming reducing to high temperature.
Present technique mainly comprises high-pressure bottle, built-in electrothermal high-temperature stove, high-pressure metal pipeline, canister blank and five basic modules of working water.
This technology makes high temperature furnace and mould placed apart, thereby makes mould both can use resistant to elevated temperatures ceramic material mould, also can use metal material mould (as stainless steel mould).
Hot conduction technique is fit to wider range of processing, and it not only is suitable for being shaped, and the blank cavity volume is big, degrees of expansion is big, intensity is high, the container-like metal parts of the reducing of wall thickness, also is suitable for processing thin-walled, low-intensity, metal parts that degrees of expansion is little.
5. the mode with the pressure conduction directly provides expansion vessel blank wall, and the technology and the assembly of the required inner high voltage of the container-like metal parts of once-forming reducing.
Be characterized in, at first with topped up with water in the high-pressure bottle, then by the working water in the interior mode of heating heating high-pressure container to high temperature, when the inner high voltage that is produced by hot operation water (supercritical water) reaches predetermined pressure, open the high pressure valve between high-pressure bottle and the metal stock, be transmitted in the cavity of container blank via the high-pressure metal pipeline by the huge inner high voltage that high-temperature water produced in the high-pressure bottle like this, the wall of expansion vessel blank makes its distortion, until the outer surface of the container blank technology with the surperficial basically identical of mould inner mould.
Present technique mainly comprises high-pressure bottle, built-in electrothermal high-temperature stove, high-pressure metal pipeline, high-pressure stop valve, canister blank and six basic modules of working water.
With respect to the heat conduction, pressure conduction manufacturing process, container blank lower for those forming pressures or that cavity is less or degrees of expansion is less or intensity is lower or wall is thin is comparatively suitable.
6. pre-warmed technology of canister blank.It is characterized in that at mould outside cover one moderate oven, and the canister blank in the die cavity is carried out pre-warmed technology through mould.Its effect one is to make metal blank (no matter heat is conducted or the pressure conduction) dilatancy under hot state; The 2nd, reduce the loss of heat in the container blank in the heat transfer process, shorten the required time of once-forming.
7. a high temperature ultra high water pressure once former in the inside internally heating metal container.Equipment comprises four most of 18 basic modules, first's high-temperature high-pressure apparatus (pressure source): comprise high-pressure bottle (1), built-in high temperature furnace (2), cooling water circulating device (3), working water (4); Second portion is temperature (or pressure) transmission equipment: high-pressure metal pipeline (5) and muff (6), high pressure valve (7); Third part is a former: comprise female mold (12), middle temperature preheating furnace (13) and furnace shell (14), mould fixed support (16), canister blank (11), canister blank support (9), sealing plug (8), metal ferrules (10); The 4th part is a control appliance: comprise Temperature-controlled appliance (2,17), mould open/close and mobile control device (15,18).
Equipment characteristic: the working water in 1. adopting in the mode heating high-pressure container of heating, make it produce needed inner high voltage in the forming process, be about to the high-temperature electric heat element and place high-pressure bottle inside, directly the working water in the container is heated internally, make it produce required inner high voltage in the forming process; 2. pressure source (high-pressure bottle and high temperature furnace) and mould are placed apart, and mould both can use high temperature resistant, high strength ceramic material mould (as the silicon nitride ceramic material mould) also can use metal material mould (as the stainless steel material mould); 3. adopt the mode of pressure conduction (or heat conduction), directly (or indirectly) provides expansion tubular (container-like) metal stock required inner high voltage.Required inner high voltage is to be produced by the high-temperature water in the high-pressure bottle in the forming process, and is transmitted in the container blank cavity via the high-pressure metal pipeline; 4. the high-pressure bottle outer wall is wound with square (or circular) copper pipe cooling water circulating device, with the tensile strength of raising high-pressure bottle wall, and then the operating temperature and the operating pressure of raising working water; 5. the outside of female mold is with a moderate oven, so that the canister blank is preheated; 6. internally heated pressure vessel tensile strength height, the operating temperature height of working water can produce inner high voltage required in the forming process to greatest extent.
8. in the pressure conduction inside internally heating metal container-the high temperature ultra high water pressure once manufacturing process
Be characterized in, utilize the inner high voltage that is produced by hot operation water in the high-pressure bottle, via the high-pressure metal pipeline inner high voltage is delivered in the container blank cavity, expanding metal container blank wall and the required inner high voltage of the container-like metal parts of once-forming reducing directly are provided.Concrete steps are as follows:
1. at first metal blank is prefabricated into the uniform tubular of wall thickness (container-like) metal stock; 2. with topped up with water in the high-pressure bottle; 3. with there being the chock plug of axially extending bore that container blank openend is sealed, the other end of chock plug then links to each other chock plug with the high-pressure metal pipeline with high-pressure bottle; 4. place the female mould cavities of overcoat moderate oven to preheat metal blank with support to the temperature of setting; 5. open the built-in electrothermal high-temperature stove of high-pressure bottle inside and the cooling water circulating device of chamber wall outside, the working water in adopting in the mode heating high-pressure container of heating is to the temperature of setting; 6. when the inner high voltage that is produced by high-temperature water (supercritical water) in the high-pressure bottle reaches predetermined pressure, open high pressure valve, the huge inner high voltage that is produced by hot operation water (supercritical water) in the high-pressure bottle is transmitted in the cavity of container blank by the high-pressure metal pipeline like this, the wall of expansion vessel blank makes its distortion, until container blank wall outer surface and mould inner mould surface basically identical; 7. close high pressure valve, open mould and chock plug, so just obtain the various container-like metal parts of double-form reducing that not only had formalness but also had external morphology.
9. in the heat conduction inside internally heating metal container-the high temperature ultra high water pressure once manufacturing process
Be characterized in, working water at first adopting in the mode of heating heating high-pressure container is to high temperature, then by the high-pressure metal pipeline, the high temperature of hot operation water in the high-pressure bottle is delivered in the metal stock cavity water, to high temperature, produce expansion vessel blank wall and the required inner high voltage of the container-like metal parts of once-forming reducing with the water in the heat conducting mode indirect metal stock cavity.Concrete steps are as follows:
1. at first metal blank is prefabricated into the uniform tubular of wall thickness (container-like) metal stock; 2. be with topped up with water in the high-pressure bottle, also topped up with water in the cavity of container blank; 3. with there being the chock plug of axially extending bore that container blank openend is sealed, the other end of chock plug then links to each other chock plug with the high-pressure metal pipeline with high-pressure bottle; 4. place the female mould cavities of overcoat moderate oven to preheat metal blank with support to the temperature of setting; 5. open the built-in electrothermal high-temperature stove of high-pressure bottle inside and the cooling water circulating device of chamber wall outside, the working water in adopting in the mode heating high-pressure container of heating is to the temperature of setting, and the high temperature furnace operating temperature will be far above the operating temperature of moderate oven; 6. the high temperature that is produced by hot operation water in the high-pressure bottle is transmitted in the container blank cavity water by the high-pressure metal pipeline, water in the indirect metal blank cavity is to high temperature, when the pressure that is produced when high-temperature water (supercritical water) surpasses the tension force that container blank wall can bear, the wall of expansion vessel blank makes its distortion, until its outer surface and mould inner mould surface basically identical; 7. stop heating, the extremely safe temperature of metal parts that reduces furnace temperature and processed; 8. open mould and chock plug, so just obtain the container-like metal parts of various reducings.
10. the high-temperature high-pressure apparatus described in claim 7, promptly inner high voltage produces equipment.Comprise high-pressure bottle (1), built-in electrothermal high-temperature stove (2), container outer wall cooling water circulating device (3), working water (4).Its feature is as follows:
High-pressure bottle assembly (1).It is characterized in that container material can be high strength, dystectic titanium alloy, titanium maxter alloy, tool steel, high-quality stainless steel, also can be other high strength, resistant to elevated temperatures alloy material.External container form and external morphology can be circular, square, also can be other high voltage bearing forms.Under the condition that starts the external refrigeration water circulation system, this container can bear the inside water pressure about 1.2GPa for a long time under 700 ℃ of internal high temperature.In addition, guaranteeing to bear under the prerequisite of 1.2GPa inside water pressure, the high-pressure bottle volume is big as far as possible, and water capacity is many as far as possible, and the degree that the canister blank is expanded is just big.
Built-in electrothermal high-temperature furnace module (2).Be characterized in the high-temperature electric heat stove is placed high-pressure bottle inside, directly the working water in the high-pressure bottle heated internally, so that produce required interior super-pressure in the forming process.This assembly comprises high-temperature electric heat element (2-1), insulating coating (2-2), the metal coating housing (2-3) of heating outside and plain conductor four parts of wrapping up in insulating barrier outward.In add the sealing that thermal design should guarantee the high-pressure bottle under high pressure (super-pressure) working environment, guarantee that again heating and plain conductor are in heating process and the insulating properties between working water and the high-pressure bottle wall.Therefore, must scribble resistant to elevated temperatures insulating materials at heating and plain conductor outside.
Heating (2-1) adopts silicon carbide rod (operating temperature is 1000-1350 ℃), or silication molybdenum bar (operating temperature 1350-1600 ℃ is up to 1800 ℃).Before using to silicon carbide rod and silication molybdenum bar at high temperature (1700 ℃) carry out sintering; make silicon carbide rod and silication molybdenum bar outer surface produce thicker high temperature resistant siliceous insulation and the antioxidation coating (2-2) of one deck; use resistant to elevated temperatures metal shell (2-3) to be wrapped in silicon carbide rod and silication molybdenum bar high-temperature electric heat outside elements then; thereby avoid heating directly to contact with high-temperature water; with the siliceous insulating barrier of protection silicon carbide rod and silication molybdenum bar outer surface, prolong the service life of high-temperature electric heat element.
High-temperature electric heat element (2-1) is welded on the high-pressure bottle wall together with the metal coating housing (2-3) of outside; or be fixed on the high-pressure bottle wall by the conical surface-conical surface or the conical surface-sphere with the spiral shell tool; and high-temperature electric heat element and temperature thermocouple are drawn with the plain conductor that is coated with insulating coating outward; link to each other with temperature controller with external power supply, will guarantee that simultaneously high-pressure bottle under high pressure has good sealing property.
The cooling water circulating device of high-pressure bottle outer wall (3).It is characterized in that being wrapped in the outer wall of high-pressure bottle all around by the copper pipe of square (or circular), be used for the outer wall of cooled containers, improve the tensile strength of chamber wall, and the operating temperature of working water, and then produce shaping thick-walled metal material and the needed interior super-pressure of high-strength metal material.
Working water in the high-pressure bottle (4).It is characterized by light water, and add a spot of ethylene glycol, to reduce the corrosivity of high-temperature high pressure water (supercritical water) high-pressure bottle and container blank inwall.Water in the high-pressure bottle is full state, and the water in the container blank can be full of, that partly be full of or filling water not, it is fixed that this will look forming pressure height, container blank cavity size, the coefficient of expansion, degrees of expansion size, Strength of Metallic Materials, container blank wall thickness waits.
11. the temperature described in claim 7 (or pressure) transmission equipment: comprise high-pressure metal pipeline (5) and muff (6), reach high pressure valve (7).Its feature is as follows:
High-pressure metal pipeline assembly (5).It is characterized in that adopting high-quality stainless steel (1Cr18Ni9Ti) metal pipe line of little boss ratio, and the inside water pressure that can bear 1.2GPa for a long time.Pipeline one end is welded on high-pressure bottle (1), or on the sealing punch (8), the other end then is welded on taper or the globe joint, and joint and high pressure valve (7) then adopt the conical surface-conical surface, the conical surface-ball face sealing based on elastic deformation.This pipeline plays the pressure and temperature conduction, and the high pressure and the high temperature that are about to be produced by high-temperature water (supercritical water) in the high-pressure bottle are transmitted in the container blank, provide expansion vessel blank wall required inner high voltage.
High-pressure metal pipeline muff assembly (6) is to be wound into high-pressure metal pipeline outside by the belt that insulation materials such as resistant to elevated temperatures asbestos are done, and effect is to guarantee that high temperature thermal loss in the process that is transmitted to metal blank cavity water of the high-temperature water in the high-pressure bottle is as far as possible little.
The high-pressure stop valve of high pressure valve assembly (7) for forming by stainless steel material fine finishining, the high pressure valve both sides respectively process a nut that contains the conical surface, link to each other with high-pressure bottle (1) by joint one side, and opposite side and sealing plug (8) join.The sealing of needle in the valve (ball) and valve seat is based on elastic deformation, and the two grinds together during manufacturing, the precision prescribed height.High pressure valve and metal pipe line joint adopt the conical surface-conical surface, the conical surface-ball face sealing based on elastic deformation.The effect of valve is will to be sent in the container blank cavity by the inner high voltage that high-temperature water produced in the high-pressure bottle at any time, and inner high voltage required in the forming process is provided.
12. the former described in claim 7.Comprise female mold (12), middle temperature preheating furnace (13) and furnace shell (14), mould fixed support (16), canister blank (11), container blank support (9), sealing plug (8), metal ferrules (10).Its feature is as follows:
Die assembly (12).It is characterized by a female mold, the both available high strength of material, resistant to elevated temperatures ceramic material (as silicon nitride ceramics), also available metal material (as stainless steel material).Mould divides upper and lower (or left and right) two halves, one is semifixed, and second half can free folding and moves and controlled by hydraulic machinery (15,18).Upper die and lower die (or left mould and right mould) are female mold, and its internal mold form is according to any machinable form that need be limit, as cucurbit shape, beading, form such as square, circular, oval, trapezoidal.According to needs, upper die and lower die (or left mould and right mould) die cavity form can be identical, symmetry, also can be different, asymmetrical.
In warm electrothermal furnace assembly (13).It is characterized in that making by high-resistance alloy (as Ni-Cr and Fe-Cr-Al alloy) heating (heating wire or ribbon heater), tightly be enclosed within the outside of female mold (12), match, also be divided into upper and lower two parts with mould, its folding is controlled (15,18) with moving by hydraulic machinery.Its effect is that the container blank is preheated, and metal blank is expanded under hot state.
In warm electrothermal furnace furnace shell assembly (14) be to make by steel plate, fastening mould is played in the outside of warm electrothermal furnace in tightly being enclosed within, the impulsive force in the time of can bearing the metal blank thermal expansion.Outer cover of steel plate matches with mould (12) and middle temperature electrothermal furnace (13), also is divided into two parts up and down, and its folding is controlled by hydraulic machinery (15,18) with moving.
Mould m (16) is to be processed by thick steel products or cast iron, and effect is that counterdie is fixed, and only mobile patrix.
Metal blank support (9) is to be processed by thick steel products or cast iron, and its effect is the fixing metal blank, and relatively move be the band moderate oven mould.
Container blank (11).It is characterized by the uniform container-like metal blank of wall thickness that a preprocessing forms.Its material can be high-intensity titanium alloy, carbon steel, also can be stainless steel, and metal material such as the lower copper of intensity, aluminium alloy.
Metal ferrules (10) is a kind of metal ferrules that is processed by high temperature resistant, high-strength metal material (as titanium alloy etc.), tightly be enclosed within the container blank outside between sealing plug and the mould, its effect is to prevent that metal stock from expanding in forming process at first from here, thus limit container blank only female mould cavities in expand.
Container blank sealing plug assembly (8).It is characterized in that chock plug is taper or the spherical chock plug that axially extending bore is arranged by the centre that high-strength metal material processes.Chock plug is sealed container blank openend based on the conical surface-conical surface, the conical surface-sphere of elastic deformation, the other end of chock plug is welded on the high-pressure metal pipeline and through high pressure valve and links to each other with high-pressure bottle, thereby make the inner high voltage that is produced by high-temperature water (supercritical water) in the high-pressure bottle be transmitted in the container blank cavity wall of expansion vessel blank via high pressure line.
Except that above-mentioned high-temperature high-pressure apparatus, temperature (pressure) transmission equipment, former, in the inside internally heating metal container of the present invention-the high temperature ultra high water pressure once former also comprises control appliance, as Temperature-controlled appliance (2,17), mould open/close and mobile control device (15,18).It is characterized by:
Temperature-controlled appliance assembly (2,17).Intensification, cooling and constant temperature in order to control high temperature furnace and moderate oven.Thermocouple has two kinds, and a kind of is nichrome alumino-nickel couple, and temperature measurement accuracy can reach 0.2 ℃; Another kind is a platinum platinum-rhodium thermocouple, and temperature measurement accuracy can reach 0.2 ℃.The thermocouple outside scribbles insulating coating, places high-pressure bottle inside with the high-temperature electric heat element, and with the plain conductor that is coated with insulating coating outward it is drawn, and links to each other with temperature controller.Temperature-controlled appliance is a kind of programmable temperature programming controller.
Mould open/close control appliance assembly (15,18).The mode of employing hydraulic machinery control is in order to folding and mobile (counterdie is fixing) of control patrix.And in the container-like metal parts process of reducing, mould is applied an external force, thus make container blank touch mould in a flash in expansion, can not relatively move between mould up and down.
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| CN105828970A (en) * | 2013-11-15 | 2016-08-03 | Adm28责任有限公司 | Electrohydraulic forming device |
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| CN105828970A (en) * | 2013-11-15 | 2016-08-03 | Adm28责任有限公司 | Electrohydraulic forming device |
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