CN1903477A - Hot press-forging formation method for magnesium alloy thin shells, and special mould therefor - Google Patents
Hot press-forging formation method for magnesium alloy thin shells, and special mould therefor Download PDFInfo
- Publication number
- CN1903477A CN1903477A CN 200510046938 CN200510046938A CN1903477A CN 1903477 A CN1903477 A CN 1903477A CN 200510046938 CN200510046938 CN 200510046938 CN 200510046938 A CN200510046938 A CN 200510046938A CN 1903477 A CN1903477 A CN 1903477A
- Authority
- CN
- China
- Prior art keywords
- punch
- magnesium alloy
- die
- hot press
- formation method
- 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.)
- Granted
Links
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000015572 biosynthetic process Effects 0.000 title claims description 19
- 238000009497 press forging Methods 0.000 title claims description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000005242 forging Methods 0.000 claims abstract description 13
- 239000000314 lubricant Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 230000002787 reinforcement Effects 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 10
- 239000004033 plastic Substances 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 8
- 238000000465 moulding Methods 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Forging (AREA)
Abstract
A thermal impact forging method for forming the thin Mg-alloy casing used by MP3 reproducer, mobile telephone, PDA, digital camera, etc includes such steps as providing Mg-alloy blank (1.5-6 mm in thickness), heating die set to 200-400 deg.C, heating blank to 250-450 deg.C, coating lubricant on said blank, putting the blank in female die, and moving the male die downward for compact forging. Its dedicated die set is also disclosed.
Description
Technical field
The present invention relates to magnesium alloy plastic working production technology, particularly a kind of have than complex geometry profile the magnesium alloy shell spare Hot press-forging formation method and the particular manufacturing craft thereof of (as having screw column, reinforcement etc.).
Background technology
3C Products such as computer, communication product, consumer electronics were propagated its belief on a large scale in recent years, and these type of article often must have portability.The structural material of present most of portable product is still based on engineering plastic, though its performance can satisfy the demand (as: it is easy etc. that intensity is enough, light weight, low cost, easy to manufacture, peripheral manufacturer cooperate) of portable product structure usually, but along with the continuous development of social demand, various plastic materials have begun can not meet the demands gradually at structural rigidity, thermal diffusivity etc.Particularly higher to the requirement of product material characteristic, as Electromagnetic Interference shielding, recuperability etc., traditional plastic material can't satisfy these demands.Magnesium is structural metallic material the lightest in the industry, and its density only is 1.74g/cm.Magnesium and magnesium alloy have some attracting character: good thermal conductivity, electric conductivity and capability of electromagnetic shielding; High specific strength, specific stiffness and damping performance; The excellent processing manufacturability energy as advantages of good casting, machining property, and has good welding performance under protective atmosphere.The aboundresources of magnesium, under the pressure of current increasingly serious energy and environment, magnesium alloy is easy to reclaim and helps characteristics such as environmental protection it is caught people's attention.Therefore for the high-tech product of pursuing light, thin, short, little and environmental protection, magnesium alloy will be one of the most popular metal material in this century, be expected to obtain significant progress.
At present, magnesium-alloy material mainly adopts die-casting technique processing, but die casting still has that many shortcomings that can't overcome are slow such as speed of production, acceptance rate is low, surface hole defect etc.Compare with cast magnesium alloy, wrought magnesium alloy is thinner organizationally, more even on the composition, inside is finer and close, therefore wrought magnesium alloy has high strength and high-elongation than cast magnesium alloy, and plastic working has that surface quality is good, speed of production fast, the acceptance rate advantages of higher, therefore develops the magnesium alloy Technology of Plastic Processing and is and demand the work carried out at present urgently.
Common magnesium alloy plastic processing method, as punching press, complicated geometric shape can't be shaped.Usually all have complicated parts such as the screw hole of projection and reinforcement in the 3C Product thin shell piece, screw hole can be used to connect lower casing, and LCD and other electron component also can be installed; Reinforcement can improve the rigidity of thin shell piece.These positions then can't be shaped in modes such as punching presses.And adopt hot impact forging technology to carry out this type of thin shell piece processing is a kind of effective method of shape.
Summary of the invention
The object of the invention provides a kind of magnesium alloy shell spare Hot press-forging formation method and particular manufacturing craft thereof, solves the shaping problem of complicated geometric shape, can obtain stock utilization height, magnesium alloy shell spare that surface quality is good.
Technical scheme of the present invention is:
Magnesium alloy shell spare Hot press-forging formation method, concrete processing step is:
(1) with mold heated to 200～400 ℃;
(2) with thick be 1.5mm～6mm blank, be heated to 250～450 ℃;
(3) blank is coated lubricant;
(4) blank is put into die, punch moves downward, and speed is 10～500 mm/second.
After impact forging finishes, from mould, take out drip molding, after the cooling, cut edge, cut unnecessary limit portion.Carry out machined then, comprise boring, cutting etc.Carry out surface treatment and spraying at last, finish the manufacturing of finished product.
The particular manufacturing craft that is adopted mainly comprises: cope match-plate pattern, die backing plate, move back piece, die, core bar, punch, punch retainer, lower bolster.Wherein: die is put on the die backing plate, moves back piece and core bar is put into die, with screw and shop bolt die and die backing plate is fixed on the lower bolster, and punch is installed on punch retainer, is fixed in cope match-plate pattern with screw and shop bolt.The principal character of mould is: punch has screw column, reinforcement corresponding screw column hole and the reinforcement groove with thin shell piece, the punch side has punch constraint wall, the sidewall of the corresponding thin shell piece of difference, punch constraint wall wall thickness is identical with the thin shell piece sidewall thickness, punch constraint wall bottom surface length is less than the thin shell piece sidewall length of correspondence, and formation can be held the spout of excess metal.
Described punch constraint wall bottom surface length accounts for 4/5～9/10 of pairing thin shell piece sidewall length.
Described mould is equipped with heating, attemperator; Radially be distributed with the heating rod hole in the die, heating rod places in the heating rod hole.
The principle of the invention is as follows:
The lattice of magnesium is that close-packed hexagonal lattice is arranged, and { 0001} produces slippage, so easy embrittlement under the magnesium alloy normal temperature to have only basal plane under the room temperature; { 1011} produces slippage to first kind pyramidal plane in the time of more than 200 ℃, and plasticity greatly improves; { 1012} also may produce slippage to the second class pyramidal plane in the time of more than 225 ℃, and plasticity improves bigger.Therefore necessary rising temperature to produce new deformation mechanism, just is enough to make material deformation easy.And the plastic deformation under higher temperature, dynamic recrystallization can take place, energy crystal grain thinning, raising mechanical performance.Under the higher temperature, the required tonnage of impact forging is more much lower than tonnage required under the lower temperature; But if material temperature is higher than 450 ℃, can cause grain growth, reduce mechanical performance.So the magnesium alloy blank temperature need be controlled well, generally at 250～450 ℃.
Good lubricating condition can be beneficial to flowing of magnesium alloy materials, effectively reduces die wear, and the required tonnage of reduction equipment improves surface quality of products.Die inwall, core bar working surface and punch working position need carry out polishing.The magnesium alloy blank surface is carried out polishing.Before impact forging, blank surface will evenly be coated with and spread lubricant, and lubricant can adopt liquid polytetrafluoroethylene (PTFE) or molybdenum bisuphide or graphite.
Magnesium alloy mobile bad, such as the thin shell piece for shape such as square box, the forming height opposing sidewalls middle part, four corners of sidewall is much lower.At the flow behavior of magnesium alloy, reasonably design the punch shape and can effectively improve the forming height in four corners, make the sidewall height even, reduce trimming allowance, save blank.
Major advantage of the present invention:
1, the present invention improves the punch geometric shape, increases constraint wall and spout, make the thin shell piece sidewall smooth, highly evenly, the side cut amount less, save blank.
2, the thin-wall part geometric shape that is shaped of the present invention is complicated, can have screw column, reinforcement etc., and convenient upper and lower shell connects, and is easy to install parts such as the wiring board of electronic product inside and LCD, has improved product rigidity, and the thin shell piece of production is applicable to 3C Product.
3, shell wall thickness of the present invention, thickness can reach 0.5～0.8mm, meets light, thin, short, the little characteristics of 3C Product requirement.
4, the present invention is by the magnesium alloy shell spare of the manner shaping, and surface quality is good, simplifies follow-up surface treatment process.
5, the present invention processes under reasonable technological parameter, can obtain tiny crystal grain, and mechanical performance of products is higher than the product that alternate manner is shaped.
Description of drawings
The hot impact forging particular manufacturing craft of the magnesium alloy section of structure that Fig. 1 adopts when specifically implementing for the present invention.
Fig. 2 a-b is a die profile of the present invention.Wherein, Fig. 2 a is a front view; Fig. 2 b is the C-C cutaway view of Fig. 2 a.
The typical products figure of Fig. 3 for adopting the present invention to make.
Fig. 4 is for making the punch figure of product shown in Figure 3.
Among the figure, 1 lower bolster; 2 die backing plates; 3 move back piece; 4 dies; 5 core bars; 6 punch; 7 punch retainers; 8 cope match-plate patterns; 9 thin shell pieces; 10 screw columns; 11 reinforcements; 12 corners; 13 sidewalls; 14 heating rod holes; 15 screw column holes; 16 reinforcement grooves; 17 spouts; 18 constraint wall bottom surfaces; 19 punch constraint wall.
The specific embodiment
Below in conjunction with accompanying drawing and concrete enforcement the present invention is further detailed.
Shown in Fig. 1 and Fig. 2 a-b, the particular manufacturing craft that is adopted mainly comprises: lower bolster 1, die backing plate 2, move back piece 3, die 4, core bar 5, punch 6, punch retainer 7, cope match-plate pattern 8.Wherein: die 4 is put on the die backing plate 2, moves back piece 3 and core bar 5 is put into die 4, with screw and shop bolt die 4 and die backing plate 2 is fixed on the lower bolster 1.Punch 6 is installed on punch retainer 7, is fixed in cope match-plate pattern 8 with screw and shop bolt.
As shown in Figure 3, hot impact forging thin shell piece 9 inside have 10,1 reinforcements 11 of 4 screw columns.The preform thin shell piece is a square, and difficult point is: shell inside not only will be shaped screw column and reinforcement, and also four angles 12 of thin shell piece are difficult to be shaped.
(thickness is 1.5mm～6mm), and its area equates with preform thin shell piece bottom area, can just keep flat in the die to get the rolling or extrusion plate of magnesium alloy AZ31.According to the shape and the volume of preform thin shell piece finished product, by volume equal principle is suitably reserved surplus, accurately calculates the thickness of required blank.
Blank is carried out surface finish handle, put into heating furnace then and be heated to 250～450 ℃.Under this temperature, the plasticity of magnesium alloy is good, can effectively reduce equipment tonnage, the grain growth phenomenon can not take place simultaneously.
With mould and die preheating to 200～400 ℃, preferably maintain the temperature at more than 300 ℃.Blank is evenly smeared lubricant liquid polytetrafluoroethylene (PTFE) or molybdenum bisuphide or graphite, put into die 4 then, place on the core bar 5.Radially be distributed with 12 heating rod holes 14 in the die, heating rod is placed in the heating rod hole 14.Heating mould can guarantee that blank temperature is in required deformation temperature scope, shown in Fig. 2 a-b.
The screw column 10 and the reinforcement 11 of corresponding preform thin shell piece 9, punch 6 has screw column hole 15 and reinforcement groove 16.Under punch 6 effects, 4 screw columns 10 and reinforcement 11 can be shaped.According to the plastic deformation characteristic of magnesium alloy, the forming height in the middle of the preform thin shell piece sidewall 13 is usually far above the forming height in four corners 12.For this reason, as shown in Figure 4, punch of the present invention has 4 punch constraint walls 19,4 sidewalls of corresponding preform thin shell piece respectively.Sidewall 13 as punch constraint wall 19 corresponding preform thin shell pieces.Punch constraint wall 19 can limit the forming height in the middle of the thin shell piece sidewall 13, effectively improves the forming height in four corners 12.When retraining 18 places, wall bottom surface as flowing to punch when the magnesium alloy materials distortion, punch constraint wall 19 continues limiting material upwards to flow, and to two side flow, flows to the corner, thereby has improved the forming height in four corners 12.Punch constraint wall bottom surface length is less than thin shell piece sidewall length, and described punch constraint wall bottom surface length accounts for 4/5～9/10 of pairing thin shell piece sidewall length.Can form spout 17 like this, unnecessary metal can flow out from spout 17.
Embodiment 1
Magnesium alloy shell spare Hot press-forging formation method, concrete processing step is as follows:
(1) with mold heated to 200 ℃;
(2) thickness is heated to 250 ℃ for 1.5mm sheet material;
(3) blank evenly is coated with spreads lubricant liquid polytetrafluoroethylene (PTFE);
(4) blank is put into die, punch moves downward speed and goes out hull shape spare for the 500mm/s impact forging.According to the size and dimension difference of drip molding, the size that punch is applied power is controlled at and is 5ton/cm
2～15ton/cm
2
Magnesium alloy shell spare Hot press-forging formation method, concrete processing step is as follows:
(1) with mold heated to 300 ℃;
(2) thickness is heated to 350 ℃ for 3mm sheet material;
(3) blank evenly is coated with spreads lubricant molybdenum bisuphide;
(4) blank is put into die, punch moves downward speed and goes out hull shape spare for the 100mm/s impact forging.According to the size and dimension difference of drip molding, the size that punch is applied power is controlled at and is 5ton/cm
2～15ton/cm
2
Magnesium alloy shell spare Hot press-forging formation method, concrete processing step is as follows:
(1) with mold heated to 400 ℃;
(2) thickness is heated to 450 ℃ for 6mm sheet material;
(3) blank evenly is coated with spreads lubricant graphite;
(4) blank is put into die, punch moves downward speed and goes out hull shape spare for the 10mm/s impact forging.According to the size and dimension difference of drip molding, the size that punch is applied power is controlled at and is 5ton/cm
2～15ton/cm
2
After impact forging finishes, from mould, take out drip molding, after the cooling, cut edge, cut unnecessary limit portion.Carry out machined then, comprise boring, cutting etc.Carry out surface treatment and spraying at last, finish the manufacturing of finished product.
Claims (9)
1, magnesium alloy shell spare Hot press-forging formation method, product be shaped as box-shaped casing, there is varied in thickness shell bottom interior wall part, has screw column, reinforcement etc., it is characterized in that concrete processing step is as follows:
(1) with mold heated to 200～400 ℃;
(2) with blank heating to 250～450 ℃;
(3) blank evenly is coated with spreads lubricant;
(4) blank is put into die, punch moves downward impact forging and goes out hull shape spare.
2, magnesium alloy shell spare Hot press-forging formation method according to claim 1, it is characterized in that: described blank is cast panel, stripper plate or milled sheet, thickness is 1.5mm～6mm.
3, magnesium alloy shell spare Hot press-forging formation method according to claim 1, it is characterized in that: described lubricant is liquid polytetrafluoroethylene (PTFE) or molybdenum bisuphide or graphite.
4, magnesium alloy shell spare Hot press-forging formation method according to claim 1, it is characterized in that: it is 10～500mm/s that described punch moves downward speed.
5, magnesium alloy shell spare Hot press-forging formation method according to claim 1, it is characterized in that: the working portion on the described punch carries out polishing; The die inwall carries out polishing.
6, the used particular manufacturing craft of magnesium alloy shell spare Hot press-forging formation method according to claim 1, comprise lower bolster (1), die backing plate (2), move back piece (3), die (4), core bar (5), punch (6), punch retainer (7), cope match-plate pattern (8), wherein: die (4) is put on the die backing plate (2), move back piece (3) and core bar (5) is put into die (4), die (4) and die backing plate (2) are fixed on the lower bolster (1), punch (6) is installed on punch retainer (7), punch (6) and punch retainer (7) are fixed in cope match-plate pattern (8), it is characterized in that: punch (6) has the screw column with thin shell piece, the corresponding screw column of reinforcement hole (15) and reinforcement groove (16), punch (6) side has punch constraint wall (19), the sidewall (13) of the corresponding thin shell piece of difference, punch constraint wall (19) wall thickness is identical with thin shell piece sidewall (13) thickness, punch constraint wall bottom surface length is less than thin shell piece sidewall (13) length of correspondence, and formation can be held the spout (17) of excess metal.
7, the used particular manufacturing craft of magnesium alloy shell spare Hot press-forging formation method according to claim 6 is characterized in that: described punch constraint wall bottom surface length accounts for 4/5～9/10 of pairing thin shell piece sidewall length.
8, the used particular manufacturing craft of magnesium alloy shell spare Hot press-forging formation method according to claim 6, it is characterized in that: mould is equipped with heating, attemperator.
9, the used particular manufacturing craft of magnesium alloy shell spare Hot press-forging formation method according to claim 6, it is characterized in that: radially be distributed with heating rod hole (14) in the described die (4), heating rod places in the heating rod hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100469388A CN100391647C (en) | 2005-07-27 | 2005-07-27 | Hot press-forging formation method for magnesium alloy thin shells, and special mould therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100469388A CN100391647C (en) | 2005-07-27 | 2005-07-27 | Hot press-forging formation method for magnesium alloy thin shells, and special mould therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1903477A true CN1903477A (en) | 2007-01-31 |
| CN100391647C CN100391647C (en) | 2008-06-04 |
Family
ID=37672925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100469388A Expired - Fee Related CN100391647C (en) | 2005-07-27 | 2005-07-27 | Hot press-forging formation method for magnesium alloy thin shells, and special mould therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100391647C (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357632A (en) * | 2011-08-03 | 2012-02-22 | 合肥金海康五金机械制造有限公司 | High-deformation press forging forming process for complex structural aluminum alloy mobile phone shell with convex post |
| CN101850396B (en) * | 2009-04-01 | 2012-04-18 | 中国科学院金属研究所 | Two-stage press forging and forming method of metal thin shell piece with inward convex micro-structure |
| CN102513485A (en) * | 2011-12-06 | 2012-06-27 | 中国科学院金属研究所 | Two-step heat press-forging molding method of magnesium alloy thin-wall element and molding die |
| CN102764841A (en) * | 2012-07-19 | 2012-11-07 | 西北工业大学 | Core mold and shaping method for shaping strip annular internal reinforced rib rotary body thin-wall part |
| CN103231002A (en) * | 2013-04-19 | 2013-08-07 | 亚超特工业有限公司 | Forging mould and molding method of metal casing applied to electronic device |
| TWI422443B (en) * | 2010-02-03 | 2014-01-11 | Kuo Chen Hung | Magnesium fastener manufacturing method and magnesium fastener member thereof |
| CN103736894A (en) * | 2014-01-02 | 2014-04-23 | 中南大学 | Isothermal forging die and forging technology thereof of magnesium alloy die forge piece of step type structure |
| CN107838351A (en) * | 2017-10-26 | 2018-03-27 | 杨晓艳 | The processing molding method and purposes of a kind of magnesium alloy sheet |
| CN109127974A (en) * | 2018-10-15 | 2019-01-04 | 临沂高新区双航材料科技有限公司 | A kind of forging method of helmet magnesium lithium-base alloy guide rail |
| CN110508743A (en) * | 2019-09-02 | 2019-11-29 | 许昌中兴锻造有限公司 | Stock flange shaft forging technology |
| CN112916777A (en) * | 2020-12-28 | 2021-06-08 | 东北轻合金有限责任公司 | Manufacturing method of high-formability magnesium alloy forging for spaceflight |
| CN113828722A (en) * | 2021-09-05 | 2021-12-24 | 桂林理工大学 | Design method of hard disk box body extrusion die |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20100035A1 (en) * | 2010-01-15 | 2011-07-16 | Tsa Solutions S R L | METHOD AND EQUIPMENT FOR FORMING PIECES IN MAGNESIUM ALLOY. |
| TW201401966A (en) * | 2012-06-18 | 2014-01-01 | Shu-Yuan Liao | Method of manufacturing thin-type housing and product thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4803880A (en) * | 1987-12-21 | 1989-02-14 | United Technologies Corporation | Hollow article forging process |
| CN1345641A (en) * | 2000-09-22 | 2002-04-24 | 江兴锻压工业股份有限公司 | Magnesium alloy forging formation technology |
| CN2511413Y (en) * | 2001-09-04 | 2002-09-18 | 福光企业股份有限公司 | Shockproof die for forge shaping apparatus |
| CN2805975Y (en) * | 2005-07-27 | 2006-08-16 | 中国科学院金属研究所 | Magnesium alloy thin-wall parts hot-impact forging forming die |
-
2005
- 2005-07-27 CN CNB2005100469388A patent/CN100391647C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101850396B (en) * | 2009-04-01 | 2012-04-18 | 中国科学院金属研究所 | Two-stage press forging and forming method of metal thin shell piece with inward convex micro-structure |
| TWI422443B (en) * | 2010-02-03 | 2014-01-11 | Kuo Chen Hung | Magnesium fastener manufacturing method and magnesium fastener member thereof |
| CN102357632A (en) * | 2011-08-03 | 2012-02-22 | 合肥金海康五金机械制造有限公司 | High-deformation press forging forming process for complex structural aluminum alloy mobile phone shell with convex post |
| CN102357632B (en) * | 2011-08-03 | 2014-04-30 | 合肥金海康五金机械制造有限公司 | High-deformation press forging forming process for A 5052-H32 aluminum alloy mobile phone shell with convex post |
| CN102513485A (en) * | 2011-12-06 | 2012-06-27 | 中国科学院金属研究所 | Two-step heat press-forging molding method of magnesium alloy thin-wall element and molding die |
| CN102764841B (en) * | 2012-07-19 | 2014-05-14 | 西北工业大学 | Core mold and shaping method for shaping strip annular internal reinforced rib rotary body thin-wall part |
| CN102764841A (en) * | 2012-07-19 | 2012-11-07 | 西北工业大学 | Core mold and shaping method for shaping strip annular internal reinforced rib rotary body thin-wall part |
| CN103231002A (en) * | 2013-04-19 | 2013-08-07 | 亚超特工业有限公司 | Forging mould and molding method of metal casing applied to electronic device |
| CN103736894A (en) * | 2014-01-02 | 2014-04-23 | 中南大学 | Isothermal forging die and forging technology thereof of magnesium alloy die forge piece of step type structure |
| CN107838351A (en) * | 2017-10-26 | 2018-03-27 | 杨晓艳 | The processing molding method and purposes of a kind of magnesium alloy sheet |
| CN109127974A (en) * | 2018-10-15 | 2019-01-04 | 临沂高新区双航材料科技有限公司 | A kind of forging method of helmet magnesium lithium-base alloy guide rail |
| CN110508743A (en) * | 2019-09-02 | 2019-11-29 | 许昌中兴锻造有限公司 | Stock flange shaft forging technology |
| CN112916777A (en) * | 2020-12-28 | 2021-06-08 | 东北轻合金有限责任公司 | Manufacturing method of high-formability magnesium alloy forging for spaceflight |
| CN113828722A (en) * | 2021-09-05 | 2021-12-24 | 桂林理工大学 | Design method of hard disk box body extrusion die |
| CN113828722B (en) * | 2021-09-05 | 2023-05-30 | 桂林理工大学 | Design method of hard disk box extrusion die |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100391647C (en) | 2008-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1903477A (en) | Hot press-forging formation method for magnesium alloy thin shells, and special mould therefor | |
| CN2907951Y (en) | Warm shaping mould special for magnesium alloy mobile phone shell | |
| CN2774673Y (en) | Thermal hydraulic forming mould unit for magnesium alloy plate | |
| CN100382911C (en) | Pressure variable edge force difference temperature drawing method for magnesium alloy plate | |
| CN103231002B (en) | Forging mould and molding method of metal casing applied to electronic device | |
| CN100444982C (en) | Differential temperature drawing mould of magnesium alloy plate | |
| CN1903473A (en) | Mild hot formation method for making magnesium alloy shell of cell phone and mould specially for the same | |
| CN100425366C (en) | Integral extrusion forming method for asymmetrical assembly parts and apparatus thereof | |
| CN108555052B (en) | Two-side variable-channel forced plastic deformation extrusion method and forming die for rib plate type components | |
| CN110744751B (en) | 3D printing anti-grafting forming manufacturing method of injection mold | |
| CN2805975Y (en) | Magnesium alloy thin-wall parts hot-impact forging forming die | |
| CN102581193A (en) | Magnesium alloy precision forging die and magnesium alloy precision forging process | |
| CN201702266U (en) | Draw bead structure of drawing die | |
| CN104841834A (en) | Cold extrusion forming die fixture and cold extrusion forming method for aluminum rear covers of cellphones | |
| CN103495732B (en) | The densified pressure head of jet deposition metal slabs, device and application | |
| Appermont et al. | Sheet-metal based molds for low-pressure processing of thermoplastics | |
| CN100446913C (en) | Bent machining method for metal plate | |
| CN104275427A (en) | Manufacturing method of multi-station die for multi-step shafts | |
| CN206500501U (en) | A kind of rapid shaping steel mold | |
| CN1817503A (en) | Precisioning forging method of crawler belt plate | |
| CN205289485U (en) | Water tank mainboard mould of radiator | |
| CN204735551U (en) | Cold extrusion molding mould of lid behind aluminium matter cell -phone | |
| CN105817552A (en) | Expansion wheel forming process | |
| CN103277765A (en) | Magnesium-copper composite metal LED radiator and precision forging forming technology thereof | |
| CN113145709A (en) | Sheet forming soft die structure with enhanced additive manufacturing insert and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080604 Termination date: 20160727 |