CN104070100B - A kind of preparation method of workpiece - Google Patents
A kind of preparation method of workpiece Download PDFInfo
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- CN104070100B CN104070100B CN201310109892.4A CN201310109892A CN104070100B CN 104070100 B CN104070100 B CN 104070100B CN 201310109892 A CN201310109892 A CN 201310109892A CN 104070100 B CN104070100 B CN 104070100B
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Abstract
The invention provides the preparation method of a kind of workpiece, including: base material is placed in the first mould and preforming in the first condition, obtains prefabricated component；Described first mould includes the die cavity with the first shape, described preform surfaces and described first mating shapes；Described prefabricated component is placed in the second mould and molding under a second condition, obtains workpiece；Described second mould includes the die cavity with the second shape, described surface of the work and described second mating shapes；Described first shape forms the second shape under a second condition.The present invention provides a kind of method that the box-like workpiece uniformity is prepared in raising so that right-angled corners is the most damaged, few with other part thickness subtractive.Improve the uniformity of workpiece, workpiece rupturing because of wall unevenness can be reduced, improve the overall mechanical properties of housing simultaneously.
Description
Technical field
The present invention relates to materials processing preparation field, be specifically related to the preparation method of a kind of workpiece.
Background technology
During the thermoforming of box-like workpiece, owing to product form is various, the factor of the ultimate deformation such as turning and dead angle,
Sheet material is in mechanical stamping process, and the sharp corner material elongation of product is too big, causes wall thickness the most thinning, material non-uniform flow
Dynamic position occurs the most thinning, and wall thickness presents obvious heterogeneity.This Wall-Thickness Difference opposite sex can cause some position in molding
Occur before completing rupturing gas leakage, affect product quality.
In order to solve above-mentioned technical problem, processing method of the prior art is to be placed in mould by sheet material, first heats, so
After be passed through gas, under the effect of gas pressure, material extends moulding, final identical with mold cavity.
But the heterogeneity that this method still can cause material stretches, so it is thinning to present heterogeneity, extend
It is easy to rupture because extending excessive compared with large part.Therefore position, turning there will be the most thinning or ruptures.This molding scheme
Shortcoming is that material cannot be the most thinning, and position, turning cannot obtain the compensation of material, so having occurred as soon as turning part material
The most thinning, integral product evenness of wall thickness is poor, thus has influence on the manufacture of finished product and the quality of finished product.
Summary of the invention
The technical problem to be solved in the present invention is to provide the thermoforming process of a kind of workpiece, the wall of the box-like workpiece of preparation
Thick uniform, reduce breakage, make workpiece also have good mechanical performance while i.e. having perfect shape.
In order to solve above technical problem, the invention provides the preparation method of a kind of workpiece, including:
Base material is placed in the first mould and preforming in the first condition, obtains prefabricated component；Described first mould includes
There is the die cavity of the first shape, described preform surfaces and described first mating shapes；
Described prefabricated component is placed in the second mould and molding under a second condition, obtains workpiece；Described second mould bag
Include the die cavity with the second shape, described surface of the work and described second mating shapes；Described first shape is at second condition
Lower formation the second shape.
Preferably, described base material is placed in the first mould and in the first condition preforming particularly as follows:
Base material is heated in the first mould；
Base material is made to form the shape matched with described first die profile by pressure-air.
Preferably, described base material is for can deform upon under heating and pressure-air effect, and has malleable gold
Belong to or macromolecular material.
Preferably, described first it is shaped as edge and has the box-like of waveform, rugby shape or boss with bottom surface intersection.
Preferably, described preform surfaces waveform, rugby shape or boss are along mold sections vertical direction bump
Thickness less than bottom thickness, female thickness is more than bottom thickness.
Preferably, described second to be shaped as edge with bottom surface be that 50～170 ° of angles are box-like.
Preferably, described prefabricated component is placed in the second mould and under a second condition molding particularly as follows:
Prefabricated component is heated in the first mould；
Base material is made to form the shape matched with described first die profile by pressure-air.
Preferably, the heating-up temperature of described base material meets following condition:
0.5TMolten≤Ts＜ TMolten；
Wherein TsFor heating-up temperature, TMoltenMelt temperature for base material.
Preferably, described first condition is different from second condition.
Present invention also offers a kind of electronic equipment, it is characterised in that including:
Housing；
Electronic devices and components are arranged in described housing；
Wherein said housing is prepared by the following method: be placed in by base material in the first mould and preformation in the first condition
Type, obtains prefabricated component；Described first mould includes the die cavity with the first shape, described preform surfaces and described first shape
Match；
Described prefabricated component is placed in the second mould and molding under a second condition, obtains workpiece；Described second mould bag
Include the die cavity with the second shape, described surface of the work and described second mating shapes；Described first shape is at second condition
Lower formation the second shape.
The invention provides the preparation method of a kind of workpiece, including: base material is placed in the first mould and at first condition
Lower preforming, obtains prefabricated component；Described first mould includes the die cavity with the first shape, described preform surfaces and described the
One mating shapes；Described prefabricated component is placed in the second mould and molding under a second condition, obtains workpiece；Described second mould
Tool includes the die cavity with the second shape, described surface of the work and described second mating shapes；Described first shape is second
Under the conditions of form the second shape.The method that the present invention provides, first by base material preforming in the first condition, makes base material thickness more
To corner part bit transition, increase turning shaping area, fill up the material thickness at turning or mold indentions, thus reduce because producing
Product suppress the wall unevenness or partial fracture deforming the material constricted flow brought and produce.The most again by prefabricated component in Article 2
Part compacted under, it is simply that need that the material at position, turning of high-elongation is first not involved in deformation in preforming and other position is first done
Molding, thus be reached for turning etc. and borrow the effect of material.
Accompanying drawing explanation
Material flow direction schematic diagram during the preforming that Fig. 1 present invention provides；
The corrugated schematic three dimensional views of prefabricated component that Fig. 2 present invention provides；
The preparation process schematic diagram of the box-like workpiece that Fig. 3 present invention provides.
Detailed description of the invention
In order to further appreciate that the present invention, below in conjunction with embodiment, the preferred embodiments of the invention are described, but
Should be appreciated that these describe simply as further illustrating the features and advantages of the present invention rather than to patent requirements of the present invention
Limit.
The invention provides the preparation method of a kind of workpiece, including:
Base material is placed in the first mould and preforming in the first condition, obtains prefabricated component；Described first mould includes
There is the die cavity of the first shape, described preform surfaces and described first mating shapes；
Described prefabricated component is placed in the second mould and molding under a second condition, obtains workpiece；Described second mould bag
Include the die cavity with the second shape, described surface of the work and described second mating shapes；Described first shape is at second condition
Lower formation the second shape.
It is an object of the invention to solve in prior art, deformation when producing ultimate deformation under pressure due to material
The problem even ruptured in uneven thickness at position.Hot-forming for an original step changing into is first carried out preforming then reshaping
Product.
According to the present invention, the base material preparing box-like profiled member preferably can occur shape under heating and pressure-air effect
Become, and have malleable metal or macromolecular material.More preferably form box-like workpiece with a kind of material, more preferably
Aluminium alloy, magnesium alloy, titanium alloy, Merlon (PC) or polymethyl methacrylate (PMMA).Described base material is sheet material or plate
Material thus convenient molding in a mold.
According to the present invention, first described base material carrying out in the first mould preforming, the purpose of preforming is to make
Base material thickness is more to corner part bit transition, increases turning shaping area, fills up the material at institute turning or mold indentions thick
Degree, thus the wall unevenness reducing the material constricted flow brought because of product compacting deformation and producing or partial fracture.Namely
" material compensation ", moves the thickness on base material to corner or recess, makes material flowing have tropism, in subsequent operation
During Workpiece shaping, material flowing is more smooth and easy, and evenly, sharp corner will not be due to ultimate deformation for the wall thickness of the box-like workpiece of preparation
Rupture.
According to the present invention, described first condition be heating after by pressure-air compressing, it is also possible to become flatulence, add
Heat is to heat the material to operate temperature, it is proposed, according to the invention, described operation temperature meets following condition 0.5TMolten≤Ts＜
TMolten molten；Wherein TsTemperature, T is i.e. operated for heating-up temperatureMoltenMelt temperature for base material.Meet above-mentioned under the conditions of, the deformation of material
Easily and will not melt, the flowing of material be base material under the effect of temperature and pressure, intermolecular displacement is formed the most slowly
Flowing, towards material deformation the best part move.According to the flow rate of material of the present invention be preferably 0.1～
1mm·s.The temperature and pressure that substrate material flow rate in a mold is subject to base material is directly proportional, but temperature is still wanted
Meet 0.5TMolten≤Ts＜ TMolten moltenThis condition, pressure is not easy to too high, and flowing otherwise can be made to slow down and stop.With aluminium alloy it is
Example, TsBeing 480 DEG C～520 DEG C, operation pressure is 0.5～10MPa, and the flow rate of material is 0.1mm s.The present invention is preferred
The aluminium alloy trade mark used is 5083 types or 7475 type aluminium alloys.As a example by magnesium alloy, TsIt is 300 DEG C～400 DEG C, operates pressure
Being 0.5～10MPa, the flow rate of material is 0.1mm s.Magnesium alloy that the trade mark be AZ31 AZ91D AZ61 is preferably used.
As a example by titanium alloy, TsBeing 900 DEG C～980 DEG C, operation pressure is 0.5～10MPa, and the flow rate of material is 0.1mm s,
Titanium alloy that the trade mark be TC4 or TC15 is preferably used.As a example by PC, TsBe 100 DEG C～140 DEG C, operation pressure be 0.5～
5MPa, flowing velocity is 1mm s, uses commercially available PC.
According to the present invention, when pre-forming operations, operation pressure is dynamic changing value, and material deformation is slow, along with high pressure
The pressure change of air, material lattice can be slowly moving and be not the movement of molecule.According to preforming of the present invention
Time is 20 minutes～60 minutes.
According to the present invention, base material stress i.e. material flow direction schematic diagram during described preforming is as it is shown in figure 1, wherein arrow
Direction is the flow direction of material, in preform process, and described waveform, rugby shape or boss coupling part i.e. depressed part
Dividing the material with bossing to be evenly distributed, the ruling part that knits a net is sectional view, it can be seen that in preform process, material stream
Dynamic smooth and easy, and piled up more material in the place that deformation is maximum.
According to the present invention, described first mould includes the die cavity containing the first shape, and the shape of described prefabricated component is with described
First mating shapes, described in match the projection that refers in die cavity and depression matches with described prefabricated component.Described prefabricated component
Surface wave shape wave, rugby shape or projection section are to utilize preforming to be expanded by the material deformation area needing deformed region, for
Next time, molding net shape carried out the compensation of corner region.Utilize being basically unchanged of material and mould first fitting part wall thickness,
The area that dispersion corner region wall thickness tension-thining participates in.Fig. 2 is the corrugated schematic three dimensional views of prefabricated component, it can be seen that arrow
The enlarged drawing at indication position, it is possible to the flow direction significantly seeing material is to move towards corner part, makes that material is oriented to turn
The flow tendency of angle part, can make material flowing more smooth and easy during follow-up forming operation, and corner region can obtain
To material compensation.
After obtaining prefabricated component according to the present invention, described prefabricated component is placed in the second mould, and molding under a second condition,
Particularly as follows: prefabricated component is heated in a second mold；Base material is made to be formed and described second die profile by pressure-air
The shape matched.According to the present invention, described second to be preferably shaped to edge with bottom surface be that 50～170 ° of angles are box-like, due to box
Shape workpiece shapes thinks that with described second shape the external surface shape of the most described box-like workpiece of coupling matches with described second mould.
According to the present invention, described second condition is preferably different from first condition, and more preferably heating-up temperature is identical, material
Flow rate reduces, and pressure change is different according to product, in advance after forming area, increases corner and participates in the area of deformation, make material
Material can be full of die cavity, corner part and ultimate deformation part more smoothly can be the most complete.Certainly this is an act
Example, is not most highly preferred embodiment of the invention.
According to the present invention, the preparation process of box-like workpiece is as it is shown on figure 3,1 is the cross section of base material, and 2 is the base after preforming
Material cross section, 3 be by prefabricated component to box-like workpiece transition state, it is the second shape that the first shape starts slow transition, and 4 is box
The cross section of shape workpiece.The schematic diagram of fold bossing during wherein amplifier section is 2 and 3, can be clearly seen that the stream of material
Dynamic direction, grid lines part is the flowing part of material, it can be seen that material is compensated to bossing.
In sum, the present invention provide method first by base material preforming in the first condition, make base material thickness more to
Corner part bit transition, increases turning shaping area, fills up the material thickness at turning or mold indentions, thus reduces because of product
Suppress the wall unevenness or partial fracture deforming the material constricted flow brought and produce.The most again by prefabricated component at second condition
Compacted under, it is simply that need that the material at position, turning of high-elongation is first not involved in deformation in preforming and other position is first made
Type, thus be reached for turning etc. and borrow the effect of material.
Present invention also offers a kind of electronic equipment, including:
Housing；
Electronic devices and components are arranged in described housing；
Wherein said housing is prepared by the following method: be placed in by base material in the first mould and preformation in the first condition
Type, obtains prefabricated component；Described first mould includes the die cavity with the first shape, described preform surfaces and described first shape
Match；
Described prefabricated component is placed in the second mould and molding under a second condition, obtains workpiece；Described second mould bag
Include the die cavity with the second shape, described surface of the work and described second mating shapes；Described first shape is at second condition
Lower formation the second shape.
According to the present invention, described electronic equipment preferably panel computer, mobile phone, desktop computer and other there is box-like workpiece
Electronic equipment.
In order to the detailed technology scheme of the present invention is expanded on further, it it is below the specific embodiment of the invention.
Embodiment 1
Taking 5083 type aluminium alloy plate thickness is 1.5mm, it is heated in the first mould, and is 0.5～5MPa at pressure
Pressure-air effect under carry out preforming, described first mould includes the die cavity containing wave-like.Described heating-up temperature is
480℃.Obtain prefabricated component 1.
Described prefabricated component 1 is heated at the second mould, and carries out under the pressure-air effect that pressure is 0.5～10MPa
Preforming, obtains notebook shell on the back.Heating-up temperature in second mould is 480 DEG C, and material flow rate is 0.1mm s.
By part section, the method thickness is used to be 9～1mm without the method turning wall thickness 0.7～0.9mm.
Embodiment 2
Taking 7475 type aluminium alloy plate thickness is 1mm, it is heated in the first mould, and is 0.5～5MPa at pressure
Carrying out preforming under pressure-air effect, described first mould includes the die cavity containing wave-like.Described heating-up temperature is 500
℃.Obtain prefabricated component 2.
Described prefabricated component 2 is heated at the second mould, and carries out under the pressure-air effect that pressure is 0.5～10MPa
Preforming, obtains desktop computer display shell on the back.Heating-up temperature in second mould is 480 DEG C, and material flow rate is 0.1mm
s。
By part section, two kinds of methods can produce without the method turning rupture (after use thickness be 0.6～
0.7mm).
Embodiment 3
Taking AZ31 type magnesium alloy plate thickness is 1.5mm, it is heated in the first mould, and is 0.5～5MPa at pressure
Pressure-air effect under carry out preforming, described first mould includes the die cavity containing wave-like.Described heating-up temperature is
300℃.Obtain prefabricated component 3.
Described prefabricated component 3 is heated at the second mould, and carries out under the pressure-air effect that pressure is 0.5～10MPa
Preforming, obtains notebook shell on the back.Heating-up temperature in second mould is 300 DEG C, and material flow rate is 0.1mm s.
By part section, the method thickness is used to be 9～1mm without the method turning wall thickness 0.7～0.9mm.
Embodiment 4
Taking AZ91D type magnesium alloy plate thickness is 1mm, it is heated in the first mould, and is 0.5～5MPa at pressure
Carrying out preforming under pressure-air effect, described first mould includes the die cavity containing wave-like.Described heating-up temperature is 400
℃.Obtain prefabricated component 4.
Described prefabricated component 4 is heated at the second mould, and carries out under the pressure-air effect that pressure is 0.5～10MPa
Preforming, obtains desktop computer display shell on the back.Heating-up temperature in second mould is 400 DEG C, and material flow rate is 0.1mm
s。
By part section, two kinds of methods can produce without the method turning rupture (after use thickness be 0.6～
0.7mm)
Embodiment 5
Taking AZ61 type magnesium alloy plate thickness is 1.3mm, it is heated in the first mould, and is 0.5～5MPa at pressure
Pressure-air effect under carry out preforming, described first mould includes the die cavity containing wave-like.Described heating-up temperature is
350℃.Obtain prefabricated component 5.
Described prefabricated component 5 is heated at the second mould, and carries out under the pressure-air effect that pressure is 0.5～10MPa
Preforming, obtains panel computer shell on the back.Heating-up temperature in second mould is 350 DEG C, and material flow rate is 0.1mm s.
By part section, the method thickness is used to be 9～1mm without the method turning wall thickness 0.7～0.9mm.
Embodiment 6
Taking TC4 Type Titanium Alloy plate thickness is 1mm, it is heated in the first mould, and at the height that pressure is 0.5～5MPa
Carrying out preforming under pressure air effect, described first mould includes the die cavity containing wave-like.Described heating-up temperature is 900
℃.Obtain prefabricated component 6.
Described prefabricated component 6 is heated at the second mould, and carries out under the pressure-air effect that pressure is 0.5～10MPa
Preforming, obtains desktop computer display shell on the back shell on the back.Heating-up temperature in second mould is 900 DEG C, and material flow rate is
0.1mm·s。
By part section, two kinds of methods can produce without the method turning rupture (after use thickness be 0.6～
0.7mm).
Embodiment 7
Taking TC15 Type Titanium Alloy plate thickness is 1.5mm, it is heated in the first mould, and is 0.5～5MPa at pressure
Pressure-air effect under carry out preforming, described first mould includes the die cavity containing wave-like.Described heating-up temperature is
980℃.Obtain prefabricated component 7.
Described prefabricated component 7 is heated at the second mould, and carries out under the pressure-air effect that pressure is 0.5～10MPa
Preforming, obtains panel computer shell on the back.Heating-up temperature in second mould is 980 DEG C, and material flow rate is 0.1mm s.
By part section, the method thickness is used to be 9～1mm without the method turning wall thickness 0.7～0.9mm.
Embodiment 8
Taking Merlon plate thickness is 1mm, it is heated in the first mould, and at the high pressure that pressure is 0.5～5MPa
Carrying out preforming under air effect, described first mould includes the die cavity containing wave-like.Described heating-up temperature is 100 DEG C.
Obtain prefabricated component 8.
Described prefabricated component 8 is heated at the second mould, and carries out under the pressure-air effect that pressure is 0.5～10MPa
Preforming, obtains panel computer shell on the back.Heating-up temperature in second mould is 100 DEG C, and material flow rate is 0.5mm s.
By part section, two kinds of methods can produce without the method turning rupture (after use thickness be 0.6～
0.7mm).
Embodiment 9
Taking Merlon plate thickness is 1.5mm, it is heated in the first mould, and at the height that pressure is 0.5～3MPa
Carrying out preforming under pressure air effect, described first mould includes the die cavity containing wave-like.Described heating-up temperature is 140
℃.Obtain prefabricated component 9.
Described prefabricated component 9 is heated at the second mould, and carries out pre-under the pressure-air effect that pressure is 0.5～5MPa
Molding, obtains notebook computer shell on the back.Heating-up temperature in second mould is 140 DEG C, and material flow rate is 1mm s.
By part section, the method thickness is used to be 9～1mm without the method turning wall thickness 0.7～0.9mm.
Above the preparation method of a kind of workpiece that the present invention provides is described in detail, used herein specifically
Principle and the embodiment of the present invention are set forth by individual example, and the explanation of above example is only intended to help and understands the present invention
Method and core concept, it is noted that for those skilled in the art, former without departing from the present invention
On the premise of reason, it is also possible to the present invention is carried out some improvement and modification, these improve and modification also falls into right of the present invention and wants
In the protection domain asked.
Claims (6)
1. the preparation method of a workpiece, it is characterised in that including:
Base material is heated in the first mould；Make base material be formed by pressure-air to match with described first die profile
Shape, obtain prefabricated component；Described first mould includes the die cavity with the first shape, described preform surfaces and described first
Mating shapes；The heating-up temperature of described base material meets following condition: 0.5TMolten≤Ts＜ TMolten；Wherein TsFor heating-up temperature, TMoltenFor
The melt temperature of base material；
Described prefabricated component is placed in the second mould and molding under a second condition, obtains workpiece；Described second mould includes tool
There are the die cavity of the second shape, described surface of the work and described second mating shapes；Described first shape shape under a second condition
Become the second shape；
Described first is shaped as edge has the box-like of waveform, rugby shape or boss with bottom surface intersection；
Described preform surfaces waveform, rugby shape or boss are less than the end along the thickness of mold sections vertical direction bump
Face thickness, female thickness is more than bottom thickness.
Preparation method the most according to claim 1, it is characterised in that described base material is can under heating and pressure effect
Deform upon, and have malleable metal or macromolecular material.
Preparation method the most according to claim 1, it is characterised in that described second be shaped as edge and bottom surface be 50～
170 ° of angles are box-like.
Preparation method the most according to claim 1, it is characterised in that described prefabricated component is placed in the second mould and
Molding under the conditions of two particularly as follows:
Prefabricated component is heated in a second mold；
Base material is made to form the shape matched with described second die profile by pressure-air.
Preparation method the most according to claim 4, it is characterised in that the heating-up temperature of described prefabricated component meets following bar
Part:
0.5TMolten≤Ts＜ TMolten；Wherein TsFor heating-up temperature, TMoltenMelt temperature for base material.
6. an electronic equipment, it is characterised in that including:
Housing；
Electronic devices and components are arranged in described housing；
Wherein said housing is prepared according to the preparation method described in any one of Claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310109892.4A CN104070100B (en) | 2013-03-29 | 2013-03-29 | A kind of preparation method of workpiece |
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|---|---|---|---|
| CN201310109892.4A CN104070100B (en) | 2013-03-29 | 2013-03-29 | A kind of preparation method of workpiece |
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| CN104070100A CN104070100A (en) | 2014-10-01 |
| CN104070100B true CN104070100B (en) | 2016-12-28 |
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ID=51591933
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108543849B (en) * | 2018-04-26 | 2021-04-09 | 沈阳航空航天大学 | Forming method and equipment of magnesium alloy box-shaped part |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1814374A (en) * | 2005-02-04 | 2006-08-09 | 财团法人金属工业研究发展中心 | Combined shaping method for electronic product substrate |
| CN101786128A (en) * | 2010-02-25 | 2010-07-28 | 机械科学研究总院先进制造技术研究中心 | Hot stamping and superplastic gas-bulging combined forming process |
| CN102019318A (en) * | 2009-09-22 | 2011-04-20 | 毅嘉科技股份有限公司 | Metal shell forming method and device |
| CN102989857A (en) * | 2012-09-14 | 2013-03-27 | 黄启瑞 | Forming method of sheet metal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0615177B2 (en) * | 1986-12-18 | 1994-03-02 | 本田技研工業株式会社 | Method for manufacturing laminated body made of thermosetting synthetic resin |
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2013
- 2013-03-29 CN CN201310109892.4A patent/CN104070100B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1814374A (en) * | 2005-02-04 | 2006-08-09 | 财团法人金属工业研究发展中心 | Combined shaping method for electronic product substrate |
| CN102019318A (en) * | 2009-09-22 | 2011-04-20 | 毅嘉科技股份有限公司 | Metal shell forming method and device |
| CN101786128A (en) * | 2010-02-25 | 2010-07-28 | 机械科学研究总院先进制造技术研究中心 | Hot stamping and superplastic gas-bulging combined forming process |
| CN102989857A (en) * | 2012-09-14 | 2013-03-27 | 黄启瑞 | Forming method of sheet metal |
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