CN102407249A - High-temperature cascade subsection supercharge blow-molding manufacturing method of bathroom copper alloy pipe fitting - Google Patents
High-temperature cascade subsection supercharge blow-molding manufacturing method of bathroom copper alloy pipe fitting Download PDFInfo
- Publication number
- CN102407249A CN102407249A CN2010102888194A CN201010288819A CN102407249A CN 102407249 A CN102407249 A CN 102407249A CN 2010102888194 A CN2010102888194 A CN 2010102888194A CN 201010288819 A CN201010288819 A CN 201010288819A CN 102407249 A CN102407249 A CN 102407249A
- Authority
- CN
- China
- Prior art keywords
- pipe
- pipe fitting
- mould
- blow
- bend pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention relates to a high-temperature cascade subsection supercharge blow-molding manufacturing method of a bathroom copper alloy pipe fitting. The method comprises the following steps: preliminary trimming: trimming a copper pipe into the copper pipe of a set size; pipe bending: bending the trimmed copper pipe into a coarse blank bent pipe of the preset shape; pipe fitting preheating: preheating the coarse blank bent pipe to 550-900 DEG C; blow-molding: placing the preheated coarse blank pipe into a mold, and carrying out blow-molding on the coarse blank bent pipe in the mold by a cascade subsection supercharge blow-molding mode, thus the coarse blank bent pipe can be expanded to contact the mold once and finally is of the preset shape, wherein the blowing pressure is 4-20Kgf/mm<2>; and final trimming: trimming the pipe fitting appropriately after the pipe fitting subjected to blow-molding is obtained from the mold, thus an air pressure molding pipe fitting finished product can be obtained. The manufacturing method provided by the invention has high plasticity, the bath copper alloy pipe fitting each cross section of which has different profiles and pipe wall thicknesses can be formed, the design is variable, also manufacturing procedures such as material regulation, pipe drawing, crystal particle refinement treatment, pipe contraction and the like are not required, and the molding speed and the production efficiency can be improved.
Description
Technical field
The present invention relates to the formation making method of copper alloy pipe fitting, relate in particular to a kind of bathroom copper alloy pipe fitting high temperature staged segmentation supercharging blowing moulding (Bath Copper Tube Heat Gradual Boost Forming) method for making.
Background technology
The forming technique of the copper alloy pipe fitting (C2700) of present special-shaped hollow structure; Adopt " pipe fitting shaped by fluid pressure technology " mostly; As the term suggests be the mould that earlier tubing is placed the tool shape; Through the inner high-pressure fluid (being main with water mainly at present) that adds of pipe fitting, the compensating pipe material of axially exerting pressure of arranging in pairs or groups is pressed into moulding in the cavity body of mould to the pipe material.The generally about 2000Bar of hydraulic coupling that its moulding is required is under the special status even up to 4000Bar.Suitable material and range of application: possess the key that good extendability is a hydroform method; The material that is applicable to cold processing and forming in principle all is applicable to pipe fitting shaped by fluid pressure technology; The forming technique of using always for the bathroom hardware products at present is main rapidoprint with copper alloy (C2700) etc. mainly.As shown in Figure 1, its production stage mainly comprises:
A. cut: copper pipe is cut according to preseting length.
B. take out pipe: the copper pipe that will cut places predetermined mold, reaches the pipe fitting thickness that each section is set with the pull fashion of extrusion.
C. the draw: will take out the hollow copper pipe that pipe accomplishes and be squeezed into the slightly thick embryonic tube of taper of ovalize of an end section, and make this thick embryonic tube have the sweeping appearance of setting, and an end of this thick embryonic tube have a bigger diameter end.
D. bend pipe: above-mentioned thick embryonic tube is cooperated the pull fashion of extrusion with bend pipe mould, according to required outward appearance curved coarse-blank bend pipe.
E. press pipe: after above-mentioned process b～d step is the profile preprocessing of preset shape with its outward appearance of external force change; Again this is had the thick embryo bend pipe of setting sweeping appearance and be positioned in the mould, this mould is made up of a patrix and a counterdie, and this upper and lower mould has the die cavity of setting respectively; The die cavity of this counterdie supplies this thick embryo bend pipe to insert; And, make the top of this thick embryo bend pipe, bottom surface press close to mould respectively, and mold the shape approaching with this die cavity moulding through the downward punching press of this patrix.
F. shaped by fluid pressure: at the upper and lower mould matched moulds of above-mentioned mould, and after arriving the setup pressure value of matched moulds, in injecting the water yield of setting in the thick embryo bend pipe of high pressure mode in this mould under the normal temperature; And utilize the side pressure cylinder of these mould both sides to do the low speed propelling towards these thick embryo bend pipe two ends, when mould inside hydraulic pressure arrives setting value, each side pressure cylinder is made propelled at high velocity again; And the supercharging compensation is done in the utilization respectively pressurized cylinder of these side pressure cylinder both sides; When above-mentioned side pressure cylinder propelled at high velocity reaches preset stroke end, promptly finish the final molding of coarse-blank bend pipe, at this moment; Again above-mentioned side pressure cylinder is done initial point involution action; And above-mentioned pressurized cylinder retreated into initial point, subsequently with upper and lower mould die sinking, can carry out the material returned action of thick embryo bend pipe.
G. cut: the thick embryo bend pipe behind the shaped by fluid pressure is taken out in this mould, and cut, can obtain required shaped by fluid pressure pipe fitting according to the length of setting.
Above-mentioned processing procedure belongs to bathroom five metals shaped by fluid pressure technology; It injects pipe fitting inside with highly pressurised liquid at normal temperatures with the mode of shaped by fluid pressure, and under hydraulic action, in die cavity, expands outwardly and produce deformation according to the die cavity shape; Because carrying out the step of shaped by fluid pressure, pipe fitting all carries out with normal temperature; Therefore, can receive tubing ductility and have only 10%～30% restriction, and must before the shaped by fluid pressure step, take out a plurality of preformed procedure of processings such as pipe, the draw, bend pipe to the thick embryo of pipe fitting earlier; After molding the thick embryonic tube spare of the approximate outward appearance of accomplishing article 80%～90% approximately, just can carry out above-mentioned shaped by fluid pressure step.
In sum; The operation of existing preformed procedure of processing is quite loaded down with trivial details; And the unconspicuous problem of rendeing a service of producing is arranged, and be subject to the low restriction of tubing percentage elongation (10%～30%) under the normal temperature, can't make the comparatively complicated product of outward appearance; Can't improve the surcharge of product, product also is difficult to accord with the demands of the market.
Summary of the invention
Main purpose of the present invention provides a kind of bathroom copper alloy pipe fitting high temperature staged segmentation supercharging blowing moulding (Bath Copper Tube Heat Gradual Boost Forming) method for making; Be intended to make the configuration design of bathroom copper alloy pipe fitting to have more variability, and then the surcharge of product is provided.
The invention provides a kind of bathroom copper alloy pipe fitting high temperature staged segmentation supercharging blowing moulding (BathCopper Tube Heat Gradual Boost Forming) method for making, may further comprise the steps:
A. cut at first: hollow copper pipe is cut according to preseting length;
B. bend pipe: the copper pipe that will cut completion goes out thick embryo bend pipe with bend pipe mould according to required outward appearance brake forming;
C. pipe fitting preheating: said thick embryo bend pipe is heated to 550 ℃～900 ℃ in advance;
D. blow molding: the thick embryo bend pipe that said heating is in advance accomplished is inserted in the mould,, the thick embryo bend pipe in the mould is carried out blow molding processing, this thick embryo bend pipe can be expanded, be last preset shape and once paste mould with staged segmentation supercharging air blowing mode; The pressure of wherein above-mentioned staged segmentation supercharging is 4Kgf/mm
2～20Kgf/mm
2
E. finally cut: the pipe fitting behind the blowing moulding is taken out in mould, and cut, obtain required air-pressure forming pipe fitting finished product according to preseting length.
Preferably; The blow molding of above-mentioned steps d mainly is after using the mold flow analysis CASE(Computer Aided Software Engineering) to obtain the stress distribution of deformation rate and moulding pipe fitting of moulding pipe fitting sectional area in advance, according to said data; The difference of pipe fitting sectional area rate of change particularly; Suitably distinguish several air blowing stages, and determine the blow gas pressure that each air blowing stage is fit to, as the execution foundation of said staged segmentation supercharging air blowing.
Preferably, the blow molding of above-mentioned steps d can be inserted in the blow molding machine through the thick embryo bend pipe that said heating is in advance accomplished and reached; Said blow molding machine comprises mould, has the die cavity of preset formation of tubes shape; At least one air inlet is located at said mould one side and is connected with said die cavity; Gas collection and pressue device have pressue device and are located at said air inlet place, can staged segmentation supercharging mode pressure-air be blown in the thick embryo bend pipe that said mould inside inserts in advance.
Preferably, the pipe fitting preheating of above-mentioned steps c can be reached through said thick embryo bend pipe is inserted to heat in the high temperature stove and accessory.
Formation making method provided by the present invention; Because adopt high temperature staged segmentation supercharging blowing moulding processing procedure, therefore, the plasticity of its thick embryo bend pipe is high; Can directly once paste mold forming and go out last preset shape with expansion, expansion pattern; So be particularly suitable for forming profiled outline shape and the different pipe fitting of pipe thickness everywhere, make the configuration design of bathroom copper alloy pipe fitting have more variability, and then the surcharge of product is provided.
Formation making method provided by the present invention; Owing to need not pass through the adjustment material, take out processing procedures such as pipe, grain refinement processing and the draw; Can directly go out last preset shape,, shaping speed accelerated so can simplify processing procedure significantly with blowing moulding; And then enhance productivity, make cost more competitive.
Description of drawings
Fig. 1 is the block flow diagram of pipe fitting shaped by fluid pressure method for making in the prior art;
Fig. 2 is the block flow diagram of bathroom copper alloy pipe fitting high temperature staged segmentation supercharging blowing moulding method for making of the present invention;
Fig. 3 is the copper pipe sketch map after the present invention cuts at first;
Fig. 4 is the thick embryo bend pipe sketch map of copper pipe of the present invention behind bend pipe;
Fig. 5 is rate of change and the moulding pipe fitting stress distribution sketch map that the present invention uses mold flow analysis CASE(Computer Aided Software Engineering) emulation moulding pipe fitting sectional area;
Fig. 6 is the sketch map that moulding pipe fitting of the present invention distributes and carries out segmentation according to the sectional area rate of change;
Fig. 7 be moulding pipe fitting perimeter change of the present invention and sectional area rate of change respectively with the corresponding curve map in moulding pipe fitting segmentation cross section;
Fig. 8 is the thick embryo bend pipe of the present invention through blow molding and formed pipe fitting finished product sketch map after finally cutting;
Fig. 9 is that 5083 aluminium alloys are in the curve synoptic diagram of three kinds of forming temperatures (450,500,550 ℃) compacted under speed to the influence of its percentage elongation;
Figure 10 is the metallographic microscope photo and the electron micrograph of moulding pipe fitting actual fabrication of the present invention;
Figure 11 is that the present invention utilizes the drawing by high temperature test to estimate the curve synoptic diagram of C2700 copper alloy in the deflection of High Temperature Gas blow molding;
Figure 12 is the tensile elongation photo of copper alloy test piece under different temperatures;
Figure 13 is the microscopic structure after the conventional hydraulic moulding, and the microscopic structure sketch map behind 580 ℃ and the 600 ℃ of high-temperature moldings.
The realization of the object of the invention, functional characteristics and advantage will combine embodiment, further specify with reference to accompanying drawing.
The specific embodiment
Below will combine accompanying drawing and preferred embodiment further explain 26S Proteasome Structure and Function characteristics of the present invention, so that understand its invention essence more intuitively.
As shown in Figure 2, the present invention provides a kind of bathroom copper alloy pipe fitting high temperature staged segmentation supercharging blowing moulding (Bath Copper Tube Heat Gradual Boost Forming) method for making, mainly comprises following method step:
Step a. cuts at first: hollow copper pipe cut according to preseting length at first, and the hollow copper pipe 10 after cutting, as shown in Figure 3.
Step b. bend pipe: the above-mentioned copper pipe 10 that cuts completion with bend pipe mould, is gone out thick embryo bend pipe 20 according to required outward appearance brake forming, as shown in Figure 4.The thick embryo bend pipe 20 of present embodiment is formed with straight length 21 and bend loss 22.
Step c pipe fitting preheating: utilize the high temperature stove and accessory that above-mentioned thick embryo bend pipe 20 is heated to 550 ℃～900 ℃ in advance.
Steps d. blow molding: the thick embryo bend pipe 20 that above-mentioned heating is in advance accomplished is inserted in the mould; With staged segmentation supercharging blowing moulding mode the thick embryo bend pipe 20 in the mould is carried out blow molding processing; This thick embryo bend pipe 20 can be expanded, be last preset shape and can once paste mould; Wherein, the blow gas pressure of above-mentioned staged segmentation supercharging is 4Kgf/mm
2～20Kgf/mm
2
What need to specify is, above-mentioned blowing moulding, be mainly the stress distribution of the deformation rate of using the mold flow analysis CASE(Computer Aided Software Engineering) to obtain moulding pipe fitting sectional area in advance and moulding pipe fitting after; As shown in Figure 5, according to above-mentioned data, the particularly difference of sectional area rate of change; Suitably distinguish a plurality of air blowing stages; And determine the blow gas pressure that each air blowing stage is fit to, and as shown in Figure 6, as the execution foundation of above-mentioned staged segmentation supercharging air blowing.For example, with reference to table 1 and Fig. 7:
Table 1
The pipe fitting of present embodiment utilizes mold flow analysis can sectional area be distinguished into A～K totally 11 sections; Wherein the sectional area rate of change of A～D section is respectively 0.8,0,1.6 and 3.3; Because numerical value is approaching each other, so distinguish over the same stage, its blow gas pressure value that is fit to is set at 7.0Kgf/mm
2Likewise, the sectional area rate of change of E～G section is respectively 12.9,15.2,30.6, because numerical value is approaching each other, so distinguish over the same stage, its blow gas pressure value that is fit to is set at 9.1Kgf/mm
2The sectional area rate of change in H～K zone then is respectively 43.1,53.6,68.4,75.3, can distinguish over the same stage, and its blow gas pressure value that is fit to is set at 12.17Kgf/mm
2Therefore, present embodiment has been distinguished three air blowing pressurization stages altogether.
Wherein, Blowing moulding for identical pipe fitting size and shape; Usually only need carry out once above-mentioned mold flow analysis; After the blow gas pressure value in air blowing number of stages and each stage is confirmed, promptly can be used as of the reference of afterwards each pipe fitting, and the one-off pattern flow analysis is all carried out in moulding at every turn in the blowing moulding step.
Above-mentioned blow molding can be inserted in the blow molding machine through the thick embryo bend pipe 20 that above-mentioned heating is in advance accomplished and reached; This blow molding machine comprises mould, has the die cavity of preset formation of tubes shape; At least one air inlet is located at this mould one side and is connected with this die cavity; Gas collection and pressue device have pressue device and are located at this air inlet place, can staged segmentation supercharging mode pressure-air be blown in the thick embryo bend pipe 20 that this mould inside inserts in advance.
Step e. finally cuts: the pipe fitting behind the above-mentioned blow molding taken out in this mould, and cuts, can obtain required air-pressure forming pipe fitting finished product 30 according to preseting length, and as shown in Figure 8.
The present invention uses above-mentioned mold flow analysis CASE(Computer Aided Software Engineering); Can obtain the rate of change and the moulding pipe fitting stress distribution of moulding pipe fitting sectional area; And can be according to the above-mentioned data setting air blowing number of stages and the blow gas pressure in each stage of blowing; Make the blowing moulding step be able to staged segmentation supercharging blowing moulding mode the thick embryo bend pipe 20 in the mould carried out blow molding processing, therefore with reference to the above-mentioned air blowing number of stages and the blow gas pressure in each stage of blowing; Whole processing procedure need not be with the copper pipe preform to approximate outward appearance; Also need not adjust material, take out handling procedures such as pipe and grain refinement, can obtain crystal grain miniaturization and uniform pipe fitting material, and help the successive process quality of stability; Simultaneously; Because the plasticity of blow molding mode is high; Can easily these thick embryo bend pipe 20 expansions be preset shape, the differently contoured section everywhere of tool, and the section everywhere of the different pipe thicknesses of tool, so can have variational bathroom copper alloy pipe fitting in order to design; Particularly form the bathroom five metals pipe fitting that profile is more complicated, the appearance design application is abundanter, thereby promote market value property.
So the advantage of way is to utilize stage by stage preset shape is expanded, is extended to the pipe fitting of different section profile in regular turn, can take into account shaping speed and moulding quality of stability, more applicable to the complicated pipe fitting of face shaping.
Fig. 9 is that 5083 aluminium alloys are in the curve synoptic diagram of three kinds of forming temperatures (450 ℃, 500 ℃, 550 ℃) compacted under speed to its percentage elongation influence.Can know that by chart this aluminium alloy is so long as under hot conditions suitably, for example 450 ℃, 500 ℃, 550 ℃ etc.; Its shaping speed is neither can be too fast, in case shaping speed is too fast, its percentage elongation can significantly reduce on the contrary; And be unfavorable for the moulding of aluminum alloy materials, and Cu alloy material has identical elongation property, so can further verify; The present invention adopts high temperature staged segmentation supercharging, owing to tube material is under the hot conditions, and with a plurality of stage supercharging blowing mouldings; Therefore, will help to improve the extensibility of aluminium alloy and copper alloy pipe fitting material, great help arranged for the effect of blowing moulding.
Figure 10 is the metallographic microscope photo and the electron micrograph of actual fabrication of the present invention.
Figure 11 estimates the curve synoptic diagram of C2700 copper alloy in the deflection of High Temperature Gas blow molding for the present invention utilizes drawing by high temperature test, can know from this test, and its forming temperature increases and shaping speed accelerates all to help to increase the deflection of C2700 copper alloy.
Figure 12 is the tensile elongation photo of copper alloy test piece under different temperatures, can know from photo and find out that the elongation of copper alloy will and promote along with the forming temperature increase.For example, when the copper alloy temperature was heated to 550 ℃, its elongation was 123% of original test piece; But when the moulding temperature was 600 ℃, its elongation then can reach 220% of original test piece.
Figure 13 is the microscopic structure after the conventional hydraulic moulding; And the microscopic structure sketch map behind 580 ℃ and the 600 ℃ of high-temperature moldings; Relatively Figure 10 can find obviously that the microscopic structure of the C2700 copper alloy behind high-temperature molding is significantly less than the conventional hydraulic moulding, and crystallite dimension is more even.Crystallite dimension is thick after the conventional hydraulic moulding, probably can cause the phenomenon of surperficial orange peel.The microscopic structure of the C2700 copper alloy behind the high-temperature molding is tiny and even, can reduce the phenomenon of surperficial orange peel after the moulding.
The above is merely the preferred embodiments of the present invention; Be not so limit its claim; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Directly or indirectly be used in other relevant technical field, all in like manner be included in the scope of patent protection of the present invention.
Claims (4)
1. a bathroom copper alloy pipe fitting high temperature staged segmentation supercharging blowing moulding (Bath Copper TubeHeat Gradual Boost Forming) method for making is characterized in that, may further comprise the steps:
A. cut at first: hollow copper pipe is cut according to preseting length;
B. bend pipe: the copper pipe that will cut completion goes out thick embryo bend pipe with bend pipe mould according to required outward appearance brake forming;
C. pipe fitting preheating: said thick embryo bend pipe is heated to 550 ℃～900 ℃ in advance;
D. blow molding: the thick embryo bend pipe that said heating is in advance accomplished is inserted in the mould,, the thick embryo bend pipe in the mould is carried out blow molding processing, this thick embryo bend pipe can be expanded, be last preset shape and once paste mould with staged segmentation supercharging air blowing mode; The pressure of wherein above-mentioned staged segmentation supercharging is 4Kgf/mm
2～20Kgf/mm
2
E. finally cut: the pipe fitting behind the blowing moulding is taken out in mould, and cut, obtain required air-pressure forming pipe fitting finished product according to preseting length.
2. bathroom copper alloy pipe fitting high temperature staged segmentation supercharging blowing moulding according to claim 1 (Bath Copper Tube Heat Gradual Boost Forming) method for making; It is characterized in that; The blow molding of said steps d mainly is after using the mold flow analysis CASE(Computer Aided Software Engineering) to obtain the stress distribution of deformation rate and moulding pipe fitting of moulding pipe fitting sectional area in advance, according to said data; The difference of pipe fitting sectional area rate of change particularly; Suitably distinguish several air blowing stages, and determine the blow gas pressure that each air blowing stage is fit to, as the execution foundation of said staged segmentation supercharging air blowing.
3. bathroom copper alloy pipe fitting high temperature staged segmentation supercharging blowing moulding according to claim 1 (Bath Copper Tube Heat Gradual Boost Forming) method for making; It is characterized in that; The blow molding of said steps d can be inserted in the blow molding machine through the thick embryo bend pipe that said heating is in advance accomplished and reached; Said blow molding machine comprises mould, has the die cavity of preset formation of tubes shape; At least one air inlet is located at said mould one side and is connected with said die cavity; Be located at the gas collection and the pressue device of said air inlet, can staged segmentation supercharging mode pressure-air be blown in the thick embryo bend pipe that said mould inside inserts in advance.
4. bathroom copper alloy pipe fitting high temperature staged segmentation supercharging blowing moulding according to claim 1 (Bath Copper Tube Heat Gradual Boost Forming) method for making; It is characterized in that; The pipe fitting preheating of said step c can be reached through said thick embryo bend pipe is inserted to heat in the high temperature stove and accessory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102888194A CN102407249A (en) | 2010-09-21 | 2010-09-21 | High-temperature cascade subsection supercharge blow-molding manufacturing method of bathroom copper alloy pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102888194A CN102407249A (en) | 2010-09-21 | 2010-09-21 | High-temperature cascade subsection supercharge blow-molding manufacturing method of bathroom copper alloy pipe fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102407249A true CN102407249A (en) | 2012-04-11 |
Family
ID=45909768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102888194A Pending CN102407249A (en) | 2010-09-21 | 2010-09-21 | High-temperature cascade subsection supercharge blow-molding manufacturing method of bathroom copper alloy pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102407249A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834273A (en) * | 2016-03-30 | 2016-08-10 | 成霖企业股份有限公司 | Pipe fitting hydraulic forming method |
| CN107695624A (en) * | 2017-09-29 | 2018-02-16 | 北京科勒有限公司 | The preparation method of bathroom hardware housing |
| CN108397266A (en) * | 2018-04-26 | 2018-08-14 | 清华大学苏州汽车研究院（相城） | A kind of monolith honeycomb catalysts intake elbow hot gas bulging process equipment and processing technology |
| CN111957825A (en) * | 2020-07-31 | 2020-11-20 | 吉林省正轩车架有限公司 | Local high-frequency normalizing participated forming die process |
| CN113976663A (en) * | 2021-10-22 | 2022-01-28 | 中国原子能科学研究院 | Manufacturing method of pressure tube |
-
2010
- 2010-09-21 CN CN2010102888194A patent/CN102407249A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834273A (en) * | 2016-03-30 | 2016-08-10 | 成霖企业股份有限公司 | Pipe fitting hydraulic forming method |
| CN105834273B (en) * | 2016-03-30 | 2017-12-05 | 成霖企业股份有限公司 | Pipe fitting hydraulic forming method |
| CN107695624A (en) * | 2017-09-29 | 2018-02-16 | 北京科勒有限公司 | The preparation method of bathroom hardware housing |
| CN107695624B (en) * | 2017-09-29 | 2019-07-19 | 北京科勒有限公司 | The production method of bathroom hardware shell |
| CN108397266A (en) * | 2018-04-26 | 2018-08-14 | 清华大学苏州汽车研究院（相城） | A kind of monolith honeycomb catalysts intake elbow hot gas bulging process equipment and processing technology |
| CN111957825A (en) * | 2020-07-31 | 2020-11-20 | 吉林省正轩车架有限公司 | Local high-frequency normalizing participated forming die process |
| CN111957825B (en) * | 2020-07-31 | 2022-08-05 | 吉林省正轩车架有限公司 | Local high-frequency normalizing participated forming die process |
| CN113976663A (en) * | 2021-10-22 | 2022-01-28 | 中国原子能科学研究院 | Manufacturing method of pressure tube |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102407249A (en) | High-temperature cascade subsection supercharge blow-molding manufacturing method of bathroom copper alloy pipe fitting | |
| CN1042305C (en) | Hollow Sucker Rod Forming Technology and Its Die | |
| CN106077257A (en) | Almag wheel hub moulding process and equipment | |
| CN113976789B (en) | Hollow reducing extrusion forming process method for titanium alloy thin-wall ultra-large cone angle special-shaped ring forging with inner and outer flange structures | |
| CN107081343B (en) | A kind of continuous plastic processing molding die of magnesium alloy profiles and forming method | |
| CN113458248B (en) | Necking and flaring mixed forming method for conical barrel part with straight barrel | |
| CN109648029A (en) | The forging die set and its forging method of large thin-wall cylinder class ring flange | |
| CN104525675A (en) | Gas bulging hot formation process of boron steel tube | |
| CN100488707C (en) | Extrusion method for producing welding wire of magnesium alloy | |
| CN104308057A (en) | Loose tooling forging blank forming method of long-sheet complicated die forge piece | |
| CN105363872A (en) | Drawing method and special tool for wavy sheet piece with abruptly-changed cross section | |
| CN1644264A (en) | High-pressure forming method in tubular member for lowering forming pressure | |
| CN101693263B (en) | Method for preparing pipe bending part by adopting flexible extrusion forming | |
| CN107649529B (en) | Bent member mistake is away from extrusion molding apparatus and method | |
| CN109622648B (en) | Asymmetric continuous large-deformation extrusion forming method for magnesium alloy | |
| CN205341647U (en) | Isothermal forming die of big camber titanium alloy covering part | |
| CN101214600A (en) | Magnesium Alloy Composite Forming Method | |
| CN102107230A (en) | Shaping device for preparing bent tube by virtue of differential-velocity extrusion of dual male dies | |
| CN1131588A (en) | Plastic Extrusion Bulging Process of Multi-way Pipe and Its Die | |
| CN106553026B (en) | Thin Walled Curved bus aluminum alloy liner forming method and molding die | |
| WO2016156094A1 (en) | Method and apparatus for forming a compound curvature metal skin | |
| CN102430608B (en) | Equipment and process for producing arc-shaped magnesium alloy plates | |
| CN101722204A (en) | Extrusion process for titanium alloy profile material | |
| CN107716689A (en) | A kind of positive drawing under sheet material inflation back pressure effect is backwards to the compound superplastic forming device of bulging and its method | |
| CN102069102A (en) | Forming manufacturing method of metal pipe fitting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120411 |