CN104624894B - There is the manufacture method that the aluminium alloy thin-walled forging of layer is put in plating - Google Patents
There is the manufacture method that the aluminium alloy thin-walled forging of layer is put in plating Download PDFInfo
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- CN104624894B CN104624894B CN201310567244.3A CN201310567244A CN104624894B CN 104624894 B CN104624894 B CN 104624894B CN 201310567244 A CN201310567244 A CN 201310567244A CN 104624894 B CN104624894 B CN 104624894B
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- aluminium alloy
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 147
- 238000005242 forging Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000007747 plating Methods 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 42
- 238000001125 extrusion Methods 0.000 claims abstract description 41
- 238000004064 recycling Methods 0.000 claims abstract description 5
- 238000005096 rolling process Methods 0.000 claims description 6
- 210000001161 mammalian embryo Anatomy 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 239000011162 core material Substances 0.000 description 15
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 229910000553 6063 aluminium alloy Inorganic materials 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- -1 7075 Chemical compound 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007743 anodising Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012407 engineering method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
The present invention relates to a kind of manufacture method having and plating the aluminium alloy thin-walled forging putting layer, its step comprises: an extruding step, prepare one to include an aluminium alloy core and an aluminium alloy and plate the stock putting material, then this stock is inserted and passed through an extrusion apparatus be extruded into an Al-alloy extrusion section bar；One thinning procedure of processing, carries out further thinning by the Al-alloy extrusion section bar completing extruding step and an Al-alloy preform is processed in preforming；One forging step, is placed in the Al-alloy preform completing thinning procedure of processing in a forging mold, then is heated by this Al-alloy preform, and the forging of this Al-alloy preform is processed as an Al-alloy thin-walled forging by recycling forging machine.
Description
Technical field
The present invention relates to the manufacture method of a kind of aluminum alloy forge piece, particularly relate to one and there is plating put layer and can reach pole
The manufacture method of the aluminum alloy forge piece of good slimming effect.
Background technology
Generally, general aluminum alloy forge piece, one of its industry application is the outer casing member as 3C Product, in terms of flat board
As a example by the outer casing member of calculation machine, its width is about at below 200mm, the integrated inner member such as projection that it is had
Or the height of limit rib (rib) is about at about 5mm (boss), the thickness of slab of this outer casing member about at below 2mm,
Industry makes plate aluminum alloy forge piece at present, mainly through forging method, by an aluminum alloy plate materials (such as 6xxx series
Aluminum alloy plate materials) utilize forging machine to give forging molding, then to possess NC function (Numerical Control, number
Value control) processing machine, thus forging molding part (or direct with sheet material or section bar) turnning and milling inner thickness and projection, limit
The inner members such as rib, i.e. can get the finished product of final aluminum alloy forge piece, here, this forging method, forging machine and NC add
Detailed fabrication steps, structure or the operating principle of engineering method be in this case art possess usual skill institute ripe
Know, repeat no more in this；
Aforesaid NC processing method is due to time-consuming too much, if the size close to this thin-wall product can be made with forging method,
Reduce NC machining period, will be provided with important industry using value, but, though conventional forging method can be used to make
Aluminum alloy forge piece, still has following problem to be overcome: first, refers to Fig. 1 and show an aluminium alloy thin-walled swaged forging
Part 1, it is when width W is 200mm, and the thickness H of easy thinning is about at about 4mm, if to forge further
Make and be thinned to below 2mm, according to existing technical level, in equipment loading and will be cannot to overcome at present on die life
Difficulty, therefore hardly consistent with 3C Product now for compact requirement；Secondly, forging method cannot directly be made
Make and there is plating put layer (cladding) or the aluminum alloy forge piece of compound (layer) material, cause product to be only capable of possessing single
Physics or material behavior, it is impossible to take into account different materials advantage (high intensity of such as 7xxx series alloys or 5xxx,
The corrosion resistance of 6xxx series alloys), in turn result in its practicality of the aluminum alloy forge piece made by conventional forging method with suitable
Limited by property, therefore, how to be improved for drawbacks described above, be the technical difficulty that inventor to be solved
Point place.
Summary of the invention
Because existing forging method, the slimming limitation that it can reach, also cannot provide in order to directly to make
There is plating to put the aluminum alloy forge piece of layer, cause the practicality of product and the suitability limited, therefore it is an object of the invention to carry
There is plating put layer for a kind of and can reach the manufacture method of aluminum alloy forge piece of splendid slimming effect.
For reaching the above object, the present invention provides a kind of and has the manufacture method that the aluminium alloy thin-walled forging of layer is put in plating,
Its step comprises: extruding step, and preparation one includes aluminium alloy core and plates the stock putting material with aluminium alloy, then by this embryo
Material is inserted and is passed through extrusion apparatus and is extruded into an Al-alloy extrusion section bar；Thinning procedure of processing, will complete this and extrude step
This rapid Al-alloy extrusion section bar carries out further thinning and Al-alloy preform is processed in preforming；Forging
Step processed, is placed in this Al-alloy preform completing this thinning procedure of processing in forging mold, then this is multiple
Closing the heating of aluminium alloy preform, the forging of this Al-alloy preform is processed as clad aluminum and closes by recycling forging machine
Gold thin-walled forging.
By combining this extruding step and this thinning procedure of processing, and this thinning procedure of processing uses and rolls Yan Fa or take out preparation method,
So that the present invention is when last forging step, can realize using the 3C electronics of this Al-alloy thin-walled forging to produce
Product, during typical width dimensions 200mm, forging is thinned to below 2mm further, makes this Al-alloy simultaneously
Thin-walled forging can have the advantage of different materials concurrently, and may be particularly useful for pole and need the shell of light-weighted portable electronic product
Body or mechanism member, and then make the present invention can reach effect application range of products being substantially improved with practicality.
The invention will be further described below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of conventional aluminium alloy thin-walled swaged forging part；
Fig. 2 is the steps flow chart block schematic diagram of the present invention；
Fig. 3 is the composition schematic diagram of stock in its extruding step of the present invention；
Fig. 3 A is the operation chart of its extruding step of the present invention；
Fig. 3 B is that the present invention adds a schematic diagram cutting operation after extruding step；
Fig. 4 is the operation chart of its thinning procedure of processing of the present invention；
Fig. 5 is the operation chart of its forging step of the present invention；
Fig. 6 is the partial cutaway schematic view of the aluminium alloy thin-walled forging made by the present invention；
Fig. 7 is the entity photo figure of the aluminium alloy thin-walled forging made by the present invention；
Fig. 8 is the structure figure after Fig. 7 part is amplified.
Description of reference numerals: 1-aluminium alloy thin-walled swaged forging part；H-thickness；W-width；3-extruding step；31-aluminium alloy
Core；311-R angular zone；Material is put in the plating of 32-aluminium alloy；33-stock；331-Al-alloy extrusion section bar；332-is combined
Aluminium alloy preform；333-Al-alloy thin-walled forging；34-extrusion apparatus；341-ingot-containing tube；342-mould；
343-depression bar；35-projection position；4-thinning procedure of processing；41-rolling mill；5-forging step；51-forging mold；511
Lower mold；512-upper mold.
Detailed description of the invention
The following is drawings and Examples etc., but present disclosure is not limited to the scope of these embodiments.
Referring to shown in Fig. 2, the present invention provides a kind of and has the manufacture method that the aluminium alloy thin-walled forging of layer is put in plating, its
Step comprises:
One extruding step 3, please also refer to shown in Fig. 3, extruding step 3 prepares a stock 33, and stock 33 comprises
Having aluminium alloy core 31 to put material 32 with aluminium alloy plating, in the present embodiment, aluminium alloy core 31 can be pole shape, aluminum
It can be hollow round tubular that Alloy Plating puts material 32, and aluminium alloy core 31 is sheathed on aluminium alloy plating and puts in material 32, and aluminum closes again
The external diameter of gold core 31 can put the thickness of material 32 more than aluminium alloy plating, please also refer to shown in Fig. 3 A, then by embryo
Material 33 is placed in the ingot-containing tube 341 of extrusion apparatus 34, and stock 33 is added by the heater of recycling extrusion apparatus 34
Heat, makes stock 33 be heated to the state in easy plastic deformation, then makes its depression bar 343 of extrusion apparatus 34 towards near containing
Ingot cylinder 341 direction pushing and pressing mould 342 and the stock 33 in easy plastic deformation state, so that stock 33 can be by mould
The nib of 342 is extruded and becomes Al-alloy extrusion section bar 331, and Al-alloy extrusion section bar 331 is surface to be had
The aluminium alloy extrusion section bar of layer (material 32 is put in aluminium alloy plating), in the present embodiment, Al-alloy extrusion section bar 331 are put in plating
It is a sheet material, additionally, according to the shape of its nib of mould 342 or style difference, the present invention also can produce other kinds
The Al-alloy extrusion section bar 331 of class, such as bar or hollow tubular product；
Wherein, aluminium alloy core 31 puts material 32 with aluminium alloy plating can be respectively selected from the aluminium alloy of two kinds of unlike materials, as
This can allow finished product have different characteristics such as high intensity and corrosion resistance concurrently simultaneously, seems that the 7xxx aluminum such as 7075,7050 close
Its intensity of gold is high, and its corrosion resistances of 6xxx and 5xxx aluminium alloy such as 6063,5052 are good, as the aluminum such as A356 (silicon)
Alloy, then can be beneficial to hard solder (brazing) operation due to characteristics such as fusing point are low, thus, more particularly, aluminium alloy core
Material 31 can be selected for 7xxx aluminium alloy or A356 aluminium alloy, and aluminium alloy plating is put material 32 and then be can be selected for 6xxx or 5xxx
Aluminium alloy；More preferably, the fusing point of material 32 fusing point more than aluminium alloy core 31 is put in aluminium alloy plating, in the present embodiment,
Aluminium alloy core 31 more specifically selects A356 aluminium alloy, aluminium alloy plating to put material 32 and then select easy anodising
6063 aluminium alloys (here, the fusing point of 6063 aluminium alloys is i.e. more than fusing point of A356 aluminium alloy), extrusion apparatus 34 again
It is one indirectly to extrude (indirect extrusion) equipment, whereby, it is possible to decrease machine utilization also has and preferably extrudes matter
Measure, namely the extruding step 3 of the present embodiment uses indirect extrustion process, but, in the embodiment that other are feasible, this
Invention may be used without direct extrustion process or common extrustion process (Co-extrusion) makes Al-alloy extrusion section bar 331,
This indirect extrusion apparatus now only need to replace to direct extrusion apparatus or common extrusion apparatus, aforementioned various extrude
Method and the structure of relevant soft hardware equipment and operating procedure, all belong to prior art and non-this case technical characteristic, therefore at this
Not describe in detail；
Additionally, please also refer to shown in Fig. 3 A and Fig. 3 B, due in the present embodiment, Al-alloy extrusion section bar
331 is sheet material, and can present the upper and lower three layers structure being respectively provided with and being coated with layer, its cross section can be seen that aluminium alloy core
Material 32 variable thickness is put in the aluminium alloy plating on R angular zone 311 surface of material 31, and to this, the present invention still can squeeze in completing
After step 3 processed, before carrying out thinning procedure of processing 4, first its both sides of Al-alloy extrusion section bar 331 are comprised aluminum and closes
The part of R angular zone 311 of gold core 31 is excised, and so, i.e. can get a plating, to put layer thickness the most uniform
Aluminium alloy extrusion section bar, and then make the present invention can have effect of improving product practicality and reliability concurrently；
Additionally, in the present embodiment, in order to coordinate the needs of product, Al-alloy extrusion section bar 331 its upper and lower two
Layer plating is put and is only needed in layer to retain one layer, and to this, the present invention can carry out thinning procedure of processing after completing extruding step 3
Before 4, first with turnning and milling or the method for removing, layer is put in one of them plating of Al-alloy extrusion section bar 331 and gives
Removing, whereby, please also refer to shown in Fig. 4, Al-alloy extrusion section bar 331 can be by three-layer type knot originally
Structure becomes two-layer structure, and then makes the present invention can have improving product application and the effect of processing elasticity concurrently；
One thinning procedure of processing 4, thinning procedure of processing 4 will complete the Al-alloy extrusion section bar 331 of extruding step 3
Carry out further thinning to process with preforming, more specifically, the method that this thinning and preforming are processed can be to roll the method for prolonging
Or for taking out preparation method (Drawing), in the present embodiment, this thinning rolls, with preforming processing employing, the method for prolonging, and coordinates the most again
Refering to shown in Fig. 4, Al-alloy extrusion section bar 331 is become a clad aluminum by rolling mill 41 rotary rolling mill and closes by it
Gold preform 332, the most i.e. can reach further thinning and changes the effect of Al-alloy extrusion section bar 331 shape,
It addition, in the embodiment that other are feasible, take out preparation method and also can reach similar effect rolling the method for prolonging, and be particularly well-suited to want
Al-alloy preform 332 is fabricated to the application scenario of the seamless pipe of slimming, due to its detailed step and behaviour
Make principle and also belong to known technology, repeat no more in this；
One forging step 5, please also refer to shown in Fig. 5, forging step 5 will complete answering of thinning procedure of processing 4
Close aluminium alloy preform 332 be placed in the lower mold 511 of a forging mold 51, here, lower mold 511 be have flat
The master mold on smooth surface, it is preferred that have aluminium alloy plating to put the side court of material 32 in Al-alloy preform 332
To lower mold 511, then the upper mold 512 of forging mold 51 is covered in Al-alloy preform 332 and lower mold 511
Top, wherein upper mold 512 is the male model of shapeable product-forming, consequently, it is possible to Al-alloy preform 332
In there is the side of aluminium alloy core 31 then towards upper mold 512, now, then by Al-alloy preform 332
Heating, wherein, the temperature of this heating is preferably set in can put material 32 with aluminium alloy core material 31 in season and aluminium alloy plating
Respectively in semisolid and the temperature of solid-state, forging mold 51 is pressurizeed by recycling forging machine, die sinking again after cooling, the most again
Coordinate refering to shown in Fig. 6, so Al-alloy preform 332 can be processed as and the shape of forging mold 51
The Al-alloy thin-walled forging 333 being consistent, Al-alloy thin-walled forging 333 is to have and plates the aluminium alloy putting layer
Thin-walled forging；Here, it is noted that due in the present embodiment aluminium alloy plating put material 32 and select and there is low-alloy contain
Amount and 6063 aluminium alloys of high-melting-point characteristic, therefore aluminium alloy plating put material 32 can be in solid-state, low temperature and lazy flow
Hot-forging forming under state, and the most tiny crystal grain, and the most careful anode appearance can be possessed after forging, with
Time, because A356 aluminium alloy (having the characteristic of low melting point) selected by aluminium alloy core 31, and make its can semisolid,
Hot-forging forming under the state of high temperature and high fluidity, namely the present invention can allow top layer (the i.e. conduct of composite aluminium alloy plates
6063 aluminium alloys of layer are put in plating) under conditions of solid-state and Low Temperature Thermal forging molding, this Al-alloy plate can also be allowed simultaneously
The core (i.e. A356 aluminium alloy) of material maintains semisolid hot-forging forming, thus can break through conventional forging at one stroke at width
The difficult problem being thinned to below 2mm cannot be forged further during 200mm；Referring again to shown in Fig. 7 Yu Fig. 8, distinguish
The entity photo figure of the Al-alloy thin-walled forging 333 produced by the present invention and Al-alloy thin-walled forging
The structure figure at 333 its projection positions 35, is plated by aluminium alloy core 31 in this structure figure and aluminium alloy and puts material
The microstructure of 32, i.e. can be seen that both forging moldings under semisolid and solid conditions really, thus confirms
The feasibility of the present invention.
Refer to shown in Fig. 2, by present invention incorporates extruding step 3 and a thinning procedure of processing 4, and thinning
Procedure of processing 4 uses rolls Yan Fa or takes out preparation method, and first can have plating through extrustion process making and put the aluminium alloy extrusion section bar of layer,
Again through rolling Yan Fa or take out this aluminium alloy extrusion section bar of the further thinning of preparation method, so that the present invention being in last forging step
When 5, can realize using the 3C electronic product of Al-alloy thin-walled forging 333, typical width dimensions 200mm
Time, forging is thinned to below 2mm further, so that the present invention can be greatly decreased follow-up required NC processor
And man-hour, make Al-alloy thin-walled forging 333 can have the advantage of different materials concurrently simultaneously, and may be particularly useful for pole
Need the housing of light-weighted portable electronic product or mechanism member, and then make the present invention can reach product is substantially improved to be suitable for
Scope and effect of practicality.
Embodiment described above is only to be described the preferred embodiment of the present invention, the not model to the present invention
Enclose and be defined, on the premise of designing spirit without departing from the present invention, those of ordinary skill in the art's skill to the present invention
Various deformation that art scheme is made and improvement, all should fall in the protection domain that claims of the present invention determines.
Claims (6)
1. one kind has the manufacture method that the aluminium alloy thin-walled forging of layer is put in plating, it is characterised in that comprise
Following steps:
Extruding step, prepares a stock, and this stock includes aluminium alloy core and puts material with aluminium alloy plating,
And the plating of this aluminium alloy core and this aluminium alloy puts material and is respectively selected from the aluminium alloy of unlike material, then by this embryo
Material is inserted and is passed through extrusion apparatus and is extruded into Al-alloy extrusion section bar；
Thinning procedure of processing, is carried out this Al-alloy extrusion section bar completing this extruding step further
Thinning and preforming process, make this Al-alloy extrusion section bar become Al-alloy preform；
Forging step, is placed in forging by this Al-alloy preform completing this thinning procedure of processing
In mould, then being heated by this Al-alloy preform, this forging mold is added by recycling forging machine
Pressure, die sinking again after cooling, so this Al-alloy preform can be processed as Al-alloy
Thin-walled forging,
The fusing point fusing point more than this aluminium alloy core of material is put in the plating of this aluminium alloy, and adds in this forging step
Heat temperature be set as can with season this aluminium alloy core and aluminium alloy plating put material respectively in semisolid and
The temperature of solid-state,
The method that the thinning of this thinning procedure of processing and preforming are processed is for rolling the method for prolonging.
There is manufacture method that the aluminium alloy thin-walled forging of layer is put in plating the most as claimed in claim 1,
It is characterized in that: this its forging mold of forging step includes a lower mold and a upper mold, this lower mold is tool
Having the master mold of flat surfaces, this upper mold is the male model of shapeable product-forming, and this Al-alloy is pre-
Forming material has aluminium alloy plating and puts the side of material towards this lower mold, this Al-alloy preform
In there is the side of aluminium alloy core then towards this upper mold.
There is manufacture method that the aluminium alloy thin-walled forging of layer is put in plating the most as described in claim 1,
It is characterized in that: this aluminium alloy core is pole shape, and the plating of this aluminium alloy to put material be hollow round tubular.
There is manufacture method that the aluminium alloy thin-walled forging of layer is put in plating the most as claimed in claim 3,
It is characterized in that: this Al-alloy extrusion section bar is sheet material.
There is manufacture method that the aluminium alloy thin-walled forging of layer is put in plating the most as described in claim 4,
It is characterized in that: after completing this extruding step, before carrying out this thinning procedure of processing, first this is combined
The part of the R angular zone that its both sides of aluminium alloy extrusion section bar comprise aluminium alloy core is excised.
There is manufacture method that the aluminium alloy thin-walled forging of layer is put in plating the most as described in claim 4,
It is characterized in that: after completing this extruding step, before carrying out this thinning procedure of processing, first with turnning and milling
Or the method abraded, layer is put in one of them plating of this Al-alloy extrusion section bar and is removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310567244.3A CN104624894B (en) | 2013-11-13 | 2013-11-13 | There is the manufacture method that the aluminium alloy thin-walled forging of layer is put in plating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310567244.3A CN104624894B (en) | 2013-11-13 | 2013-11-13 | There is the manufacture method that the aluminium alloy thin-walled forging of layer is put in plating |
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| CN104624894A CN104624894A (en) | 2015-05-20 |
| CN104624894B true CN104624894B (en) | 2016-11-23 |
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| CN107263018A (en) * | 2016-04-08 | 2017-10-20 | 杰出材料科技股份有限公司 | Cycle frame tubing preparation method |
| CN105772612B (en) * | 2016-05-13 | 2018-06-05 | 北京科技大学 | A kind of preparation method of gold copper-clad composite filament |
| CN107716821A (en) * | 2017-10-11 | 2018-02-23 | 东莞盛翔精密金属有限公司 | The anti-oxidation progressive die hot forging process of stainless steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428302A (en) * | 2008-10-31 | 2009-05-13 | 长安汽车（集团）有限责任公司 | Aldural conical thin-wall member workblank extrusion forming process |
| CN102248022A (en) * | 2011-06-14 | 2011-11-23 | 西安交通大学 | Process for manufacturing bimetal thin-wall composite pipe |
| DE102012000979A1 (en) * | 2012-01-20 | 2013-07-25 | Tox Pressotechnik Gmbh & Co. Kg | Method for connecting e.g. screw with metal sheet workpiece utilized in furniture industry, involves deforming component portion such that material of portion forms fixed connection between attachment element and component |
| CN103286150A (en) * | 2012-02-29 | 2013-09-11 | 冯一鸣 | Forming method of aluminum extrusion |
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2013
- 2013-11-13 CN CN201310567244.3A patent/CN104624894B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428302A (en) * | 2008-10-31 | 2009-05-13 | 长安汽车（集团）有限责任公司 | Aldural conical thin-wall member workblank extrusion forming process |
| CN102248022A (en) * | 2011-06-14 | 2011-11-23 | 西安交通大学 | Process for manufacturing bimetal thin-wall composite pipe |
| DE102012000979A1 (en) * | 2012-01-20 | 2013-07-25 | Tox Pressotechnik Gmbh & Co. Kg | Method for connecting e.g. screw with metal sheet workpiece utilized in furniture industry, involves deforming component portion such that material of portion forms fixed connection between attachment element and component |
| CN103286150A (en) * | 2012-02-29 | 2013-09-11 | 冯一鸣 | Forming method of aluminum extrusion |
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