CN100491005C - Metallic extrusion molding method of rotating cavity die - Google Patents

Metallic extrusion molding method of rotating cavity die Download PDF

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Publication number
CN100491005C
CN100491005C CNB2008100643867A CN200810064386A CN100491005C CN 100491005 C CN100491005 C CN 100491005C CN B2008100643867 A CNB2008100643867 A CN B2008100643867A CN 200810064386 A CN200810064386 A CN 200810064386A CN 100491005 C CN100491005 C CN 100491005C
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China
Prior art keywords
die
cavity die
cavity
blank
extrusion molding
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Expired - Fee Related
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CNB2008100643867A
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Chinese (zh)
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CN101259491A (en
Inventor
李峰
刘晓晶
郭二军
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Harbin University of Science and Technology
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Harbin University of Science and Technology
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Priority to CNB2008100643867A priority Critical patent/CN100491005C/en
Publication of CN101259491A publication Critical patent/CN101259491A/en
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Publication of CN100491005C publication Critical patent/CN100491005C/en
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Abstract

A metal squeezing shaping method for a rotary cavity die relates to a proximate matter squeezing shaping method. The invention solves the problems of uneven plasticity flow, easy generation of flow detect and large shaping load remarkably existing in the current metal squeezing shaping process. A mandrel (2) is fixed on a working platform (1); a rolling bearing (3) is arranged at the outer part of the mandrel (2); a cavity die (4) is arranged on the rolling bearing (3); the cavity die (4) rotates by a certain angular velocity; a stock (5) rotates in the same direction as the cavity die (4); a formed punch (6) moves downwards to apply pressure; the stock (5) is squeezed out along the axial direction in the cavity (4-1) of the cavity die(4). The cavity die rotating by a certain angular velocity can change the action direction of the friction between the stock and the cavity die, remarkably reduces the shaping load in the process of squeezing and can reduce the generation of the flow defect; the manufactured proximate matter has the advantages of light weight, good performance and small tonnage of the needed device, etc. The invention has the reasonable design, the reliable operation, the remarkable effects and the higher popularization value.

Description

The metallic extrusion molding method of rotating cavity die
Technical field
The present invention relates to a kind of section bar extrusion forming method.
Background technology
Extrusion molding is the metal ingot blank in the Extruding die is applied external force and to obtain a kind of plastic processing method of required section configuration and size.It is a lot of to influence in the extrusion process factor of metal flow, and as friction and lubricating condition, mould structure and blank temperature etc., wherein friction is one of critical boundaries condition of decision extruded product performance.With the forward extrusion is example, and the inhibition that rubbed very easily causes to produce mobile defect in the forming process, and has consumed a large amount of extruding energy; And it is surplus to leave certain pressure during the extruding of quiet liquid, and poor controllability, the production efficiency of extrusion speed are lower, and actively the required device of friction and Extrusion is more loaded down with trivial details, and in production practices, use less relatively.It is single optimization by technological parameter that tradition is improved the way of metal flow in the extrusion process, thereby changes the flow behavior of metal on a macro scale, but this can not fundamentally prevent generation of defects; And frictional force has consumed bigger extruding energy between blank and mould, and for the shaping of inductile metal material, production efficiency is extremely low, more is difficult to carry out the production and processing of heavy in section size section bar especially.
Based on the above, publication number is US7096705B, open day be the metallic extrusion molding method that the application for a patent for invention on August 29th, 2006 has proposed a kind of rotating cavity die, though the manufacturing process described in the literary composition has reduced the shaping load in the extrusion process, brought the low drawback of formed product qualification rate.
Summary of the invention
The metallic extrusion molding method that the purpose of this invention is to provide a kind of rotating cavity die, with solve exist in the present metallic extrusion molding process plasticity significantly flow inhomogeneous, easily produce mobile defect, problem that the formed product qualification rate is low.The present invention is finished by following steps: one, core is fixed on the workbench; Two, rolling bearing is placed on the shoulder end face of core and be installed in the outside of core; Three, place die on the rolling bearing and be enclosed within on the core; Four, the blank for preparing is put into the die cavity of die; Five, die rotates by a fixed angular speed, and blank and die rotate in the same way; Six, drift moves down and exerts pressure, and blank is extruded in the die cavity of die vertically.
The present invention has following beneficial effect: die rotates the action direction that can change frictional force between blank and the die by a fixed angular speed, shaping load in the extrusion process is significantly reduced, and can reduce the generation of mobile defect, because the extruded product streamline is certain helical form around distribution, therefore the tendency that can avoid being shaped the stress corrosion of section bar end, back and produce cracking, ground best in quality lightweight inductile section bar can disposablely be shaped, compare with traditional processing technology, the section bar that this method is produced has light weight, the intensity height, performance is good, advantages such as the equipment needed thereby tonnage is little, the present invention is reasonable in design, reliable operation, effect is remarkable, has stronger promotional value.
Description of drawings
Fig. 1 is the structure half sectional view of the mould of the specific embodiment one, and Fig. 2 is the structure half sectional view of the mould of the specific embodiment two.
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1 present embodiment is described, present embodiment is finished by following steps: one, core 2 is fixed on the workbench 1; Two, rolling bearing 3 is placed the shoulder end face 2-1 of core 2 go up and be installed in the outside of core 2; Three, place die 4 on the rolling bearing 3 and be enclosed within on the core 2; Four, the blank 5 for preparing is put into the die cavity 4-1 of die 4; Five, die 4 rotates by a fixed angular speed, and blank 5 rotates in the same way with die 4; Six, drift 6 moves down and exerts pressure, and blank 5 is extruded in the die cavity 4-1 of die 4 vertically.Rotate by die, the action direction of frictional force between blank and die is changed, it is required during extrusion molding that what overcome only is effective skin friction one-component in the axial direction, therefore, shaping load in the extrusion process is significantly reduced, and can make that the uniformity of metal flow is improved in the extrusion process, be particularly suitable for the usefulness of the shaping of lightweight inductile metal structure section bar.Change along with the die rotating speed, the numerical value of effective skin friction component also will change, can make the shaping load in the extrusion process continue to reduce, and, blank rotates owing to being subjected to the effect of die frictional force, therefore, the streamline of extrusion profile is non-parallel distribution, and section bar end, the back stress of can avoiding being shaped is corroded and the tendency of generation cracking.
The specific embodiment two: in conjunction with Fig. 2 present embodiment is described, die 4 is by deciding die 7 and moving die 8 is formed in the present embodiment; Decide die 7 and place moving die 8 tops.Die can be divided into decide die and moving die two parts, the rotation that only moving die is applied certain orientation to the blank extrusion molding time can reach the requirement that reduces load, and required die rotational load is less.
The specific embodiment three: present embodiment is in step 4, and blank 5 is magnesium alloy, aluminium and alloy thereof, titanium and alloy thereof.

Claims (3)

1, a kind of metallic extrusion molding method of rotating cavity die is characterized in that it is finished by following steps: one, core (2) is fixed on the workbench (1); Two, rolling bearing (3) is placed the shoulder end face (2-1) of core (2) go up and be installed in the outside of core (2); Three, die (4) is placed rolling bearing (3) go up and be enclosed within on the core (2); Four, the blank (5) for preparing is put into the die cavity (4-1) of die (4); Five, die (4) rotates by a fixed angular speed, and blank (5) rotates in the same way with die (4); Six, drift (6) moves down and exerts pressure, and blank (5) is extruded in the die cavity (4-1) of die (4) vertically.
2, the metallic extrusion molding method of rotating cavity die according to claim 1 is characterized in that die (4) is by deciding die (7) and moving die (8) is formed; Decide die (7) and place moving die (8) top.
3, the metallic extrusion molding method of rotating cavity die according to claim 1 is characterized in that described blank (5) is magnesium alloy, aluminium and alloy, titanium and alloy thereof.
CNB2008100643867A 2008-04-25 2008-04-25 Metallic extrusion molding method of rotating cavity die Expired - Fee Related CN100491005C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2008100643867A CN100491005C (en) 2008-04-25 2008-04-25 Metallic extrusion molding method of rotating cavity die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2008100643867A CN100491005C (en) 2008-04-25 2008-04-25 Metallic extrusion molding method of rotating cavity die

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CN101259491A CN101259491A (en) 2008-09-10
CN100491005C true CN100491005C (en) 2009-05-27

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105855396B (en) * 2016-05-25 2017-12-05 皖西学院 A kind of Tapered Cup high pressure torsion mould
CN107649527A (en) * 2017-09-22 2018-02-02 哈尔滨工业大学 A kind of Horizontal revolving-die extrusion molding apparatus for being used to improve product properties
CN108714631B (en) * 2018-05-17 2020-12-01 北京科技大学 Twisting-extruding composite plastic deformation forming method and process device
CN110665984B (en) * 2019-10-12 2021-03-12 中北大学 Extrusion forming method of magnesium alloy bar without anisotropy
CN111014411A (en) * 2019-12-10 2020-04-17 湖北文理学院 Vertical cup-shaped spinning-lathe convenient to assembly
CN115889486A (en) * 2022-12-09 2023-04-04 哈尔滨理工大学 Continuous variable cross-section profile extrusion forming device and method regulated and controlled by rotary moving die

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1530364A (en) * 1977-05-13 1978-10-25 Atomic Energy Authority Uk Extrusion apparatus
GB2138731A (en) * 1983-04-26 1984-10-31 Penny & Giles Conductive Plast A Method and Apparatus for Forming an Extruded Product from Powdered or Granular Material or from Feed-Stock
CN1665612A (en) * 2002-06-29 2005-09-07 阿尔诺·弗里德里希斯 Extrusion press tool for producing a cylindrical body consisting of a plastic mass
US7096705B2 (en) * 2003-10-20 2006-08-29 Segal Vladimir M Shear-extrusion method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1530364A (en) * 1977-05-13 1978-10-25 Atomic Energy Authority Uk Extrusion apparatus
GB2138731A (en) * 1983-04-26 1984-10-31 Penny & Giles Conductive Plast A Method and Apparatus for Forming an Extruded Product from Powdered or Granular Material or from Feed-Stock
CN1665612A (en) * 2002-06-29 2005-09-07 阿尔诺·弗里德里希斯 Extrusion press tool for producing a cylindrical body consisting of a plastic mass
US7096705B2 (en) * 2003-10-20 2006-08-29 Segal Vladimir M Shear-extrusion method

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Assignee: ZHEJIANG ZHONGJI FOUNDRY AND FORGING CO., LTD.

Assignor: Harbin University of Science and Technology

Contract record no.: 2012330000419

Denomination of invention: Metallic extrusion molding method of rotating cavity die

Granted publication date: 20090527

License type: Exclusive License

Open date: 20080910

Record date: 20120711

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: 20090527

Termination date: 20170425