CN105081045A - Hydro-mechanical deep drawing forming method for sheet metal component with uniform deformation - Google Patents
Hydro-mechanical deep drawing forming method for sheet metal component with uniform deformation Download PDFInfo
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- CN105081045A CN105081045A CN201510401566.XA CN201510401566A CN105081045A CN 105081045 A CN105081045 A CN 105081045A CN 201510401566 A CN201510401566 A CN 201510401566A CN 105081045 A CN105081045 A CN 105081045A
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- liquid
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- drawing forming
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Abstract
The invention provides a hydro-mechanical deep drawing forming method for a sheet metal component with uniform deformation. The method includes the following steps of (1), placing a sheet; (2), applying blank holder force; (3), conducting forward expansion forming; (4), setting the pressure of a liquid filling chamber; (5), conducting hydro-mechanical deep drawing forming; and (6), picking up a component. Hydro-mechanical deep drawing forming with component uniform deformation is achieved through the change of the pre-expansion direction of the sheet; and the method breaks through the limitation of the pre-expansion amount in reverse expansion hydro-mechanical deep drawing, and the deformation uniformity of the component can be greatly improved.
Description
Technical field
The invention belongs to sheet metal liquid filling deep-drawing forming technical field, be specifically related to the sheet metal component liquid filling deep-drawing forming method of a kind of homogenising distortion.
Background technology
Lightweight is that automobile realizes economize energy, reduces discharge, the important measures of reply energy crisis and environmental protection pressure.The advanced high-strength steel plate material parts such as dual phase steel are adopted to be one of main path of automobile lightweight.Because dual phase steel sheet material yield tensile ratio is low, yield strength and tensile strength difference greatly, must have sufficient deflection, obtain enough intensity after just making part forming by work hardening.But in rigid die drawing and common hydro-mechanical drawing there is the insufficient and uneven problem of distortion in part, have impact on dual phase steel plate material parts integrated carrying ability.
Hydro-mechanical drawing utilizes fluid to replace rigid matrix to make sheet metal become the forming technology of required form curved surface part as power transmission medium.Relative to traditional drawing and forming, liquid filling deep-drawing forming part has that forming limit is high, resilience is little, dimensional accuracy is high and the advantage such as surface quality is good, and therefore hydro-mechanical drawing is applicable to the shaping of the high strength difficult-to-deformation material such as part and dual phase steel of planform complexity.After entering 21 century, the active demand of automotive light weight technology makes the scope of application of high-strength steel sheet material expand gradually, and liquid filling deep-drawing forming technology is further developed, and estimates that the auto parts of about 10% will adopt this technology to produce.Before 30 years, Amino North American Corp. just achieves hydro-mechanical drawing industrial applications, but 10 years up to date, in order to reduce die cost, decreasing rebound and raising assembly precision, Cai this technology increases gradually in the application of automotive field.Up to the present, hydro-mechanical drawing is mainly used in the shaping of the parts such as fender, hood, roof outer panel, car door inner and outer plates on automobile.
In order to solve, part deformation is insufficient, the problem of distortion skewness, the eighties in 20th century is on hydro-mechanical drawing basis, propose anti-inflation hydro-mechanical drawing technique, the method refers under the initial pressure effect of liquid-filled chamber fluid media (medium), sheet material generation bulging, and obtain predetermined shape by the constraint of mould, under certain liquid chamber pressure, sheet material carries out a kind of technology of liquid filling deep-drawing forming with punch motion afterwards.But anti-inflation hydro-mechanical drawing due to pre-bulging deformation and liquid filling deep-drawing forming direction contrary, larger pre-bulk easily causes folding of material near die mouth, causes part forming failure, thus limits and improve part deformation amount and performance.
Summary of the invention
In order to solve, part deformation is insufficient, the problem of distortion skewness, and the deformation adjustment amount in anti-inflation hydro-mechanical drawing that simultaneously breaks through, by the restriction of fold defect, the invention provides the sheet metal component liquid filling deep-drawing forming method of a kind of homogenising distortion.The method is applicable to difform sheet metal part manufacture, does not limit the thickness of sheet material and intensity.
To achieve these goals, the invention provides the sheet metal component liquid filling deep-drawing forming method of a kind of homogenising distortion, the liquid-filled chamber that its liquid filling deep-drawing forming device used comprises punch, blank holder and has inner chamber, be provided with sealing ring between described punch and described blank holder, described sheet metal component liquid filling deep-drawing forming method comprises step:
(1). place sheet material, sheet material is placed horizontally at the upper surface of liquid-filled chamber;
(2). apply pressure-pad-force, control blank holder comes downwards to and contacts with sheet material, and applies pressure-pad-force F to blank holder
q; Control punch comes downwards to and contacts with sheet material, blank holder, punch and sheet material composition die cavity;
(3). be just expanded into shape, in the die cavity of blank holder, punch and sheet material composition, inject liquid, until the pressure of liquid reaches predetermined pressure P
b;
(4). setting liquid-filled chamber pressure, keeps applying pressure-pad-force F to blank holder
q, the pressure release of the liquid in the die cavity that blank holder, punch and sheet material are formed, and in the inner chamber of liquid-filled chamber, inject liquid, until the pressure of liquid reaches liquid chamber pressure P
c;
(5). liquid filling deep-drawing forming, controls punch and moves down in the inner chamber of liquid-filled chamber, until the height in the inner chamber of sheet material press-in liquid-filled chamber reaches part height;
(6). pickup, by the pressure release of the liquid in the inner chamber of liquid-filled chamber, controls punch and blank holder move, takes out formation of parts.
Wherein, described predetermined pressure P
bat below 60Mpa.Preferably, described predetermined pressure P
bbetween 40Mpa and 55Mpa.
Wherein, described liquid chamber pressure P
cat below 100Mpa.Preferably, described liquid chamber pressure P
cbetween 80Mpa and 100Mpa.
The present invention has the following advantages compared to existing technology:
1, the present invention is by changing the pre-swollen direction of sheet material, and realize the liquid filling deep-drawing forming of part homogenising distortion, the method breaches pre-swollen quantitative limitation in anti-inflation hydro-mechanical drawing.Adopt the present invention greatly can improve the deformation uniformity of part, and pre-bulk is larger, part deformation is more even.
2, adopt method of the present invention can transform existing hydro-mechanical drawing mould, because this method structure is simple, machining amount is little, therefore improvement cost is little, realization is convenient.Method of the present invention is all unrestricted to material category, sheet metal thickness, timber intensity and part strength.
3, the part adopting method of the present invention to obtain, distortion evenly, can realize the maximum using of Materials with High Strength performance.
Accompanying drawing explanation
Preferred embodiment by describing in detail below in conjunction with accompanying drawing is understood by further feature of the present invention and advantage better, wherein:
Fig. 1 shows the schematic diagram of the placement sheet material of the sheet metal component liquid filling deep-drawing forming method that homogenising according to the present invention is out of shape;
Fig. 2 shows the schematic diagram being just expanded into shape of the sheet metal component liquid filling deep-drawing forming method that homogenising according to the present invention is out of shape; And
Fig. 3 shows the schematic diagram of the liquid filling deep-drawing forming of the sheet metal component liquid filling deep-drawing forming method that homogenising according to the present invention is out of shape.
Detailed description of the invention
In the specific descriptions of following preferred embodiment, with reference to the accompanying drawing formed appended by a part of the present invention.Appended accompanying drawing shows by way of example and can realize specific embodiment of the present invention.The embodiment of example is not intended to limit according to all embodiments of the present invention.Be appreciated that under the prerequisite not departing from scope of the present invention, other embodiment can be utilized, also can carry out amendment that is structural or logicality.
In following specific descriptions, the term of directionality, such as "left", "right", " top ", " bottom ", "front", "rear", " forward ", " backward " etc., use with reference to the direction described in accompanying drawing.The parts of embodiments of the invention can be placed in multiple different direction, and the term of directionality is nonrestrictive for the object of example.
As illustrated in fig. 1-3, the liquid filling deep-drawing forming device of homogenising distortion comprises punch 1, blank holder 2, liquid-filled chamber 3 and sealing ring 4, the madial wall of blank holder 2 is provided with groove so that the installation of sealing ring 4, and liquid-filled chamber 3 upper end open forms inner chamber, as the die in shaping.Described device is utilized to comprise the following steps the method that plate material parts carries out liquid filling deep-drawing forming:
(1). place sheet material, first at the upper surface horizontal positioned sheet material 5 of liquid-filled chamber 3.
(2). apply pressure-pad-force, control blank holder 2 comes downwards to when contacting with sheet material 5 and stops, and applies pressure-pad-force F to blank holder 2
q, then control punch 1 comes downwards to and contacts with sheet material 5.
(3). be just expanded into shape; In the die cavity of blank holder 2, punch 1 and sheet material 5 composition, inject liquid, make the pressure of liquid reach predetermined pressure P
b; Now, will there is the pre-bulging deformation consistent with drawing direction (in Fig. 1 shown in arrow) in sheet material 5 under the pressure effect of liquid.
Predetermined pressure P
bdetermine, such as, at below 60Mpa according to the concrete size of part to be processed and technological requirement.Preferably, predetermined pressure P
bbetween 40Mpa and 55Mpa.
(4). setting liquid-filled chamber pressure, keeps applying pressure-pad-force F to blank holder 2
q, the pressure release of the liquid in the die cavity that blank holder 2, punch 1 and sheet material 5 are formed, and liquid is injected in the inner chamber of liquid-filled chamber 3, reach liquid chamber pressure P
c.
Liquid chamber pressure P
cdetermine, such as, at below 100Mpa according to the concrete size of part to be processed (such as, height h etc.) and technological requirement.Preferably, liquid chamber pressure P
cbetween 80Mpa and 100Mpa.
(5). liquid filling deep-drawing forming, control punch 1 and move down in the inner chamber of liquid-filled chamber 3, until the height that sheet material 5 is pressed in the inner chamber of liquid-filled chamber 3 reaches part height, process terminates.
(6). pickup: by the pressure release of the liquid in the inner chamber of liquid-filled chamber, then controls punch 1 and blank holder 2 move, takes out formation of parts.
In the above embodiments, the mode injecting liquid is well known in the art, such as, by arranging topping up passage etc. on liquid-filled chamber 3, therefore no longer can be described in detail here.
The present invention has the following advantages compared to existing technology:
1, the present invention is by changing the pre-swollen direction of sheet material, and realize the liquid filling deep-drawing forming of part homogenising distortion, the method breaches pre-swollen quantitative limitation in anti-inflation hydro-mechanical drawing.Adopt the present invention greatly can improve the deformation uniformity of part, and pre-bulk is larger, part deformation is more even.
2, adopt method of the present invention can transform existing hydro-mechanical drawing mould, because this method structure is simple, machining amount is little, therefore improvement cost is little, realization is convenient.Method of the present invention is all unrestricted to material category, sheet metal thickness, timber intensity and part strength.
3, the part adopting method of the present invention to obtain, distortion evenly, can realize the maximum using of Materials with High Strength performance.
Below technology contents and the technical characterstic of specific embodiments of the invention has been disclosed; but be appreciated that; under creative ideas of the present invention; those skilled in the art can not make various changes in the combination of this feature clearly illustrated and improve above-mentioned disclosed various characteristic sum, but all belongs to protection scope of the present invention.The description of above-described embodiment is exemplary and not restrictive, and protection scope of the present invention determined by claim.
Claims (5)
1. the sheet metal component liquid filling deep-drawing forming method of a homogenising distortion, the liquid-filled chamber that its liquid filling deep-drawing forming device used comprises punch, blank holder and has inner chamber, sealing ring is provided with between described punch and described blank holder, it is characterized in that, described sheet metal component liquid filling deep-drawing forming method comprises step:
(1). place sheet material, sheet material is placed horizontally at the upper surface of liquid-filled chamber;
(2). apply pressure-pad-force, control blank holder comes downwards to and contacts with sheet material, and applies pressure-pad-force F to blank holder
q; Control punch comes downwards to and contacts with sheet material, blank holder, punch and sheet material composition die cavity;
(3). be just expanded into shape, in the die cavity of blank holder, punch and sheet material composition, inject liquid, until the pressure of liquid reaches predetermined pressure P
b;
(4). setting liquid-filled chamber pressure, keeps applying pressure-pad-force F to blank holder
q, the pressure release of the liquid in the die cavity that blank holder, punch and sheet material are formed, and in the inner chamber of liquid-filled chamber, inject liquid, until the pressure of liquid reaches liquid chamber pressure P
c;
(5). liquid filling deep-drawing forming, controls punch and moves down in the inner chamber of liquid-filled chamber, until the height in the inner chamber of sheet material press-in liquid-filled chamber reaches part height;
(6). pickup, by the pressure release of the liquid in the inner chamber of liquid-filled chamber, controls punch and blank holder move, takes out formation of parts.
2. sheet metal component liquid filling deep-drawing forming method according to claim 1, is characterized in that, described predetermined pressure P
bat below 60Mpa.
3. sheet metal component liquid filling deep-drawing forming method according to claim 2, is characterized in that, described predetermined pressure P
bbetween 40Mpa and 55Mpa.
4. sheet metal component liquid filling deep-drawing forming method according to claim 1, is characterized in that, described liquid chamber pressure P
cat below 100Mpa.
5. sheet metal component liquid filling deep-drawing forming method according to claim 4, is characterized in that, described liquid chamber pressure P
cbetween 80Mpa and 100Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510401566.XA CN105081045A (en) | 2015-07-09 | 2015-07-09 | Hydro-mechanical deep drawing forming method for sheet metal component with uniform deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510401566.XA CN105081045A (en) | 2015-07-09 | 2015-07-09 | Hydro-mechanical deep drawing forming method for sheet metal component with uniform deformation |
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| Publication Number | Publication Date |
|---|---|
| CN105081045A true CN105081045A (en) | 2015-11-25 |
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| CN201510401566.XA Pending CN105081045A (en) | 2015-07-09 | 2015-07-09 | Hydro-mechanical deep drawing forming method for sheet metal component with uniform deformation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107042253A (en) * | 2017-04-28 | 2017-08-15 | 浙江大学 | It is a kind of to prevent the adaptive topping up method of stretch forming of anti-inflation rupture |
| CN107175295A (en) * | 2017-07-07 | 2017-09-19 | 天津航天长征火箭制造有限公司 | A kind of 3350mm grades of ellipsoid melon valve liquid-filling shaping technique and its mould |
| CN114535393A (en) * | 2022-01-18 | 2022-05-27 | 桂林电子科技大学 | Stepped pre-expansion forming processing device and method for stepped part |
-
2015
- 2015-07-09 CN CN201510401566.XA patent/CN105081045A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107042253A (en) * | 2017-04-28 | 2017-08-15 | 浙江大学 | It is a kind of to prevent the adaptive topping up method of stretch forming of anti-inflation rupture |
| CN107175295A (en) * | 2017-07-07 | 2017-09-19 | 天津航天长征火箭制造有限公司 | A kind of 3350mm grades of ellipsoid melon valve liquid-filling shaping technique and its mould |
| CN114535393A (en) * | 2022-01-18 | 2022-05-27 | 桂林电子科技大学 | Stepped pre-expansion forming processing device and method for stepped part |
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Application publication date: 20151125 |
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