CN102513435A - Plate back press forming method utilizing displacement control mode - Google Patents

Plate back press forming method utilizing displacement control mode Download PDF

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Publication number
CN102513435A
CN102513435A CN2011104211262A CN201110421126A CN102513435A CN 102513435 A CN102513435 A CN 102513435A CN 2011104211262 A CN2011104211262 A CN 2011104211262A CN 201110421126 A CN201110421126 A CN 201110421126A CN 102513435 A CN102513435 A CN 102513435A
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China
Prior art keywords
plate
slab
sheet
die
control mode
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Pending
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CN2011104211262A
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Chinese (zh)
Inventor
苑世剑
何祝斌
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Harbin Institute of Technology
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Harbin Institute of Technology
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Publication date
Application filed by Harbin Institute of Technology filed Critical Harbin Institute of Technology
Priority to CN2011104211262A priority Critical patent/CN102513435A/en
Publication of CN102513435A publication Critical patent/CN102513435A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a plate forming method, in particular to a plate back press forming method utilizing a displacement control mode, which solves the problem that the existing plate part forming method is incapable of forming parts high in deformation and complicated in shape. The plate back press forming method includes steps of placing a to-be-formed plate blank on a die holder, regulating position of a plunger rod of a hydraulic cylinder until the upper surface of a die contacts with the lower surface of the to-be-formed plate blank; pressing the to-be-formed plate blank onto the upper surface of the die holder by downward motion of a press plate and reserving a closed cavity between the lower surface of the press plate and the upper surface of the to-be-formed plate blank; injecting high-pressure fluid medium into the cavity though a through hole arranged above the press plate; and moving the die and the to-be-formed plate blank downwards synchronously until the to-be-formed plate blank is formed completely by controlling the plunger rod of the hydraulic cylinder. The plate back press forming method is used for the plate expansion process or the plate drawing forming process.

Description

A kind of sheet material back side pressing/molding method that adopts the displacement control mode
Technical field
The present invention relates to a kind of sheet material forming method, be specifically related to a kind of sheet material back side pressing/molding method that adopts the displacement control mode.
Background technology
Bulging and pull and stretch are two kinds of main manufacturing process of plate material parts.The difference of bulging and pull and stretch is, the material in flange district does not move toward mold cavity during bulging, and the material in flange district will take place obviously mobile to mold cavity during pull and stretch.During shaping, can adopt the rigidity drift or with fluid media (medium) as punch.Compare with adopting the rigidity drift, when adopting fluid media (medium) as punch, the district's sheet material that is shaped will receive equally distributed pressure effect, the stress concentration phenomenon can not occur, and the distortion of sheet material is even relatively, forming property is good.But; Adopt rigidity drift or fluid media (medium) as punch no matter be; The material in intermediate deformation district all only receives the effect of one-sided punch in forming process; The sheet material opposite side is in free state, therefore should local deformation and attenuate take place the zone easily, and big, the complex-shaped part of deflection is difficult to be shaped.
For preventing or control the local deformation and the attenuate of intermediate deformation district material, sheet material liquid-filling shaping method has dorsad appearred.Support through apply liquid at the sheet material back side, can obviously improve the deformation performance of intermediate deformation district sheet material, the big part of deflection is suitable for being shaped.But because what apply at the front and back of sheet material all is liquid, the distortion of sheet material is fully by the fluid pressure decision of front and back.When the fluid pressure of sheet material front and back was more or less the same, sheet material can not deform; When positive pressure surpassed the backside pressure certain numerical value, sheet material just deformed.This load mode can be described as pressure controling mode.Adopt compress control method to carry out the shaping of sheet material, only need to regulate the pressure of front and back, technology controlling and process is simple relatively.But; Because liquid can only apply the pressure perpendicular to plate surface to sheet material; Can't apply plastic force or restraining force along the plate surface tangential; Therefore the distortion of sheet material is very free before sheet material finally reclines concave die cavity, can't realize the effective control to the sheet material local deformation in the forming process.Therefore, can't the complicated plate material parts of shaping form.
Summary of the invention
The present invention is for solving the existing plate material parts manufacturing process problem of big, the complex-shaped part of deflection that can't be shaped, and then proposes a kind of sheet material back side pressing/molding method that adopts the displacement control mode.
The present invention addresses the above problem the technical scheme of taking to be: step of the present invention is following:
Step 1, slab to be formed is placed on the die socket, the position of the plunger rod of adjustment hydraulic cylinder makes the upper surface of die contact with the lower surface of slab to be formed;
Step 2, pressing plate move downward slab to be formed are pressed on the upper surface of die socket, and the lower surface of pressing plate and the upper surface of slab to be formed form closed cavity;
Step 3, the through hole of offering through pressing plate top are injected high-pressure fluid medium to cavity;
Step 4, through control hydraulic cylinder plunger rod move down, die and slab to be formed are moved down until slab to be formed synchronously are shaped fully;
Step 5, be shaped to finish after, let out except that high-pressure fluid medium, lift pressing plate, die is moved upward and eject shaping after slab.
The invention has the beneficial effects as follows: the present invention adopts the back support of rigidity die as slab to be formed, and the deformation process of slab to be formed can be directly controlled in the displacement that only need control the rigidity die; Adopt the back support of rigidity die,, can prevent that intermediate deformation district sheet material lacks constraint, is out of shape uncontrollable problem because of sheet material will receive certain frictional force effect as slab to be formed; Adopt the back support of rigidity die, can avoid the sheet material back side to adopt high-pressure fluid medium to do the sealing difficulty that support brings as slab to be formed; The pressure of the high-pressure fluid medium that sheet material is positive need not accurate control, can increase or reduce according to concrete needs in that slab to be formed is followed under the prerequisite that die moves down together.The present invention's big, complex-shaped part of deflection that can be shaped.
Description of drawings
Fig. 1 is the present invention's original state sketch map when adopting bulging process; Fig. 2 is the present invention's shaped state sketch map when adopting bulging process; Fig. 3 is the present invention's original state sketch map when adopting hot bulging process; Fig. 4 is the present invention's shaped state sketch map when adopting hot bulging process, and Fig. 5 is the present invention's original state sketch map when adopting deep-drawing technique, and Fig. 6 is the present invention's shaped state sketch map when adopting deep-drawing technique; Fig. 7 is the present invention's original state sketch map when adopting hot deep-drawing technique, and Fig. 8 is the present invention's shaped state sketch map when adopting hot deep-drawing technique.
The specific embodiment
The specific embodiment one: combine Fig. 1 to Fig. 8 that this embodiment is described, the concrete steps of the said a kind of sheet material back side pressing/molding method that adopts the displacement control mode of this embodiment are following:
Step 1, slab 1 to be formed is placed on the die socket 2, the position of the plunger rod 5 of adjustment hydraulic cylinder 4 makes the upper surface of die 3 contact with the lower surface of slab 1 to be formed;
Step 2, pressing plate 6 move downward slab 1 to be formed are pressed on the upper surface of die socket 2, and the upper surface of the lower surface of pressing plate 6 and slab to be formed 1 forms closed cavity 7;
Step 3, the through hole 8 offered through pressing plate 6 tops are to cavity 7 injection high-pressure fluid mediums 9;
Step 4, through control hydraulic cylinder 4 plunger rod 5 move down, die 3 and slab to be formed 1 are moved down until slab 1 to be formed synchronously are shaped fully;
Step 5, be shaped to finish after, let out except that high-pressure fluid medium 9, lift pressing plate 6, die 3 is moved upward and eject shaping after slab.
This embodiment can use in bulging process and deep-drawing technique.
The specific embodiment two: combine Fig. 1, Fig. 2, Fig. 5 and Fig. 6 that this embodiment is described, this embodiment is said, and a kind of to adopt the step 3 mesohigh fluid media (medium) 9 of the sheet material back side pressing/molding method of displacement control mode be the liquid high-pressure fluid medium 9 of 1-200Mpa.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment three: combine Fig. 1, Fig. 2, Fig. 5 and Fig. 6 that this embodiment is described, this embodiment is said, and a kind of to adopt the step 3 mesohigh fluid media (medium) 9 of the sheet material back side pressing/molding method of displacement control mode be the gaseous state high-pressure fluid medium 9 of 1-100Mpa.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment four: combine Fig. 3, Fig. 4, Fig. 7 and Fig. 8 that this embodiment is described, be fitted with several heating rods 10 on the die socket 2 of the said a kind of sheet material back side pressing/molding method that adopts the displacement control mode of this embodiment and the die 3.Other composition and annexation are identical with the specific embodiment one, two or three.
The specific embodiment five: combine Fig. 3, Fig. 4, Fig. 7 and Fig. 8 that this embodiment is described, this embodiment said a kind of slab to be formed 1 that adopts the sheet material back side pressing/molding method of displacement control mode is shaping under 50 ℃-600 ℃ heated condition.Other composition and annexation are identical with the specific embodiment four.

Claims (5)

1. sheet material back side pressing/molding method that adopts the displacement control mode is characterized in that: the concrete steps of said a kind of sheet material back side pressing/molding method that adopts the displacement control mode are following:
Step 1, slab to be formed (1) is placed on the die socket (2), the position of the plunger rod (5) of adjustment hydraulic cylinder (4) makes the upper surface of die (3) contact with the lower surface of slab to be formed (1);
Step 2, pressing plate (6) move downward slab to be formed (1) are pressed on the upper surface of die socket (2), and the upper surface of the lower surface of pressing plate (6) and slab to be formed (1) forms closed cavity (7);
Step 3, the through hole (8) offered through pressing plate (6) top are to cavity (7) injection high-pressure fluid medium (9);
Step 4, through control hydraulic cylinder (4) plunger rod (5) move down, die (3) and slab to be formed (1) are moved down until slab to be formed (1) synchronously are shaped fully;
Step 5, be shaped to finish after, let out except that high-pressure fluid medium (9), lift pressing plate (6), die (3) is moved upward and eject shaping after slab.
2. according to the said a kind of sheet material back side pressing/molding method that adopts the displacement control mode of claim 1, it is characterized in that: step 3 mesohigh fluid media (medium) (9) is the liquid high-pressure fluid medium (9) of 1-200Mpa.
3. shape method according to the said a kind of sheet material back side of displacement control mode of adopting of claim 1, it is characterized in that: step 3 mesohigh fluid media (medium) (9) is the gaseous state high-pressure fluid medium (9) of 1-100Mpa.
4. according to claim 1,2 or 3 said a kind of sheet material back side pressing/molding methods that adopt the displacement control mode, it is characterized in that: be fitted with several heating rods (10) on said die socket (2) and the die (3).
5. according to the said a kind of sheet material back side pressing/molding method that adopts the displacement control mode of claim 4, it is characterized in that: said slab to be formed (1) is under 50 ℃-600 ℃ heated condition, to be shaped.
CN2011104211262A 2011-12-15 2011-12-15 Plate back press forming method utilizing displacement control mode Pending CN102513435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011104211262A CN102513435A (en) 2011-12-15 2011-12-15 Plate back press forming method utilizing displacement control mode

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Application Number Priority Date Filing Date Title
CN2011104211262A CN102513435A (en) 2011-12-15 2011-12-15 Plate back press forming method utilizing displacement control mode

Publications (1)

Publication Number Publication Date
CN102513435A true CN102513435A (en) 2012-06-27

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106825187A (en) * 2017-02-28 2017-06-13 广西科技大学 A kind of Analysis of Hydraulic Bulging Test of Sheet Metals device
CN106975688A (en) * 2017-02-28 2017-07-25 广西科技大学 Hydroforming equipment with multiple spot cavity plate and the method that plate material parts are manufactured with it
CN107442636A (en) * 2017-09-06 2017-12-08 哈尔滨工业大学 The corrugated removing method of curved surface member building mortion, formed parts and system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1559719A (en) * 2004-03-02 2005-01-05 广东工业大学 Metal plate material hydraulic shaping method and its mould device
JP2006198648A (en) * 2005-01-19 2006-08-03 Toyota Motor Corp Method and apparatus for hydraulic bulging
CN1842381A (en) * 2003-08-28 2006-10-04 有限公司里那西美特利 Hydraulic pressure molding device and hydraulic pressure molding method
CN1911552A (en) * 2005-08-10 2007-02-14 中国科学院金属研究所 Hydraulic or pneumatic shaping method and device of plate material
CN201397274Y (en) * 2009-04-16 2010-02-03 宝山钢铁股份有限公司 Deep-drawing mould for evaluating forming performance of metal thin plate
CN102248056A (en) * 2011-06-13 2011-11-23 北京航空航天大学 Method for improving sheet forming limit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1842381A (en) * 2003-08-28 2006-10-04 有限公司里那西美特利 Hydraulic pressure molding device and hydraulic pressure molding method
CN1559719A (en) * 2004-03-02 2005-01-05 广东工业大学 Metal plate material hydraulic shaping method and its mould device
JP2006198648A (en) * 2005-01-19 2006-08-03 Toyota Motor Corp Method and apparatus for hydraulic bulging
CN1911552A (en) * 2005-08-10 2007-02-14 中国科学院金属研究所 Hydraulic or pneumatic shaping method and device of plate material
CN201397274Y (en) * 2009-04-16 2010-02-03 宝山钢铁股份有限公司 Deep-drawing mould for evaluating forming performance of metal thin plate
CN102248056A (en) * 2011-06-13 2011-11-23 北京航空航天大学 Method for improving sheet forming limit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106825187A (en) * 2017-02-28 2017-06-13 广西科技大学 A kind of Analysis of Hydraulic Bulging Test of Sheet Metals device
CN106975688A (en) * 2017-02-28 2017-07-25 广西科技大学 Hydroforming equipment with multiple spot cavity plate and the method that plate material parts are manufactured with it
CN107442636A (en) * 2017-09-06 2017-12-08 哈尔滨工业大学 The corrugated removing method of curved surface member building mortion, formed parts and system
CN107442636B (en) * 2017-09-06 2019-01-22 哈尔滨工业大学 The corrugated removing method of curved surface member forming device, formed parts and system

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Application publication date: 20120627