CN2907951Y - Warm shaping mould special for magnesium alloy mobile phone shell - Google Patents

Warm shaping mould special for magnesium alloy mobile phone shell Download PDF

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Publication number
CN2907951Y
CN2907951Y CN 200520091994 CN200520091994U CN2907951Y CN 2907951 Y CN2907951 Y CN 2907951Y CN 200520091994 CN200520091994 CN 200520091994 CN 200520091994 U CN200520091994 U CN 200520091994U CN 2907951 Y CN2907951 Y CN 2907951Y
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CN
China
Prior art keywords
mold
die
magnesium alloy
forming
blank
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Expired - Fee Related
Application number
CN 200520091994
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Chinese (zh)
Inventor
任丽梅
张士宏
徐永超
王忠堂
李章刚
郑文涛
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Institute of Metal Research of CAS
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Institute of Metal Research of CAS
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Priority to CN 200520091994 priority Critical patent/CN2907951Y/en
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Publication of CN2907951Y publication Critical patent/CN2907951Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to the technology of the alloy plank blanking forming, in particular to a special tepefaction forming mold of a magnesium alloy mobile shell. The special tepefaction forming mold is mainly applied in the drawing technology forming of the magnesium alloy plank. The utility model comprises a convex mold, an edge pressing ring and a drawing cavity mold. The drawing cavity mold adopts a sectional type combination drawing cavity mold which comprises a fixed cavity mold and a molded padding block which is in the opening of the middle of the fixed cavity and can move upward and downward. The process flow is as follows: heating the edge-pressing ring and the cavity mold to coat the mold with the lubricant to coat the blank with the lubricant to heating the blank to pre-heating the convex mold to draw shaping. The structure of the mold adopts the sectional type combination drawing cavity mold which makes the replacement of the mold easier, and increases the mold life span by 3 times. The shaped padding block in the combination drawing cavity mold improves the strained condition of the shaped pieces and increases the rate of finished products. The utility model has the advantages of accurate control of process parameters, high utility rate of materials, excellent surface quality of the finished products, high rigidity, high precision of shape and measurement, long life span of molds, low manufacturing cost and simple process and device.

Description

A kind of warm forming particular manufacturing craft of magnesium alloy shell of cell phone
Technical field
The utility model relates to the sheet alloy stamp forming technology, is specially a kind of warm forming particular manufacturing craft of magnesium alloy shell of cell phone, is mainly used in the warm deep-drawing technique of magnesium alloy plate and is shaped.
Background technology
Magnesium metal and alloy thereof are the lightest structural metallic materials of using in engineering so far, with light weight, good rigidly, metallic luster is good, electromagnetic wave shielding good and easy to be recycled be the magnesium alloy of characteristics, become Hyundai Motor, electronics, the preferred material of industries such as communication, magnesium-alloy material is to obtain by casting method at present, its shortcoming is that yield rate is low, product has more hole and loose, intensity is low, poor ductility, can not satisfy the serviceability of product requirements at the higher level, and cast member itself can not satisfy the compact requirement of magnesium alloy electronic product because the technological requirement wall thickness can not be too thin.
Sheet material drawing and forming processing mode has significant advantage aspect raising parts quality, productivity ratio, the saving material, and can process the thin-walled parts that casting can't process.For common metal and alloy thereof, drawing and forming has been mature technique very, but for magnesium alloy, the history of pull and stretch is also shorter.Mainly be because the close-packed hexagonal crystal structure of magnesium metal, cause the Plastic Forming at room temperature of most magnesium alloys very poor, elevated temperature, can improve its forming property effectively, usually need in 250-400 ℃ temperature range, shape, this will bring the drawback of mold system relative complex, the cost of product is also relatively more expensive simultaneously, and when heat time heating time is long, cause the inner crystal grain of sheet material thick easily, like this can the serious plastic deformation ability that reduces sheet material, this moment, blank was very crisp, during pull and stretch very easily in the place's drawing crack of drift fillet.In addition, magnesium alloy has significant sensitiveness to deformation velocity, and forming speed and lubricating process also are the important technical parameters of magnesium alloy plastic deformation.
The utility model content
The purpose of this utility model is to provide a kind of warm forming particular manufacturing craft of magnesium alloy shell of cell phone, solves the quality problems that exist in the magnesium alloy drawing and forming, and it can reduce production costs, and improves the quality and the production efficiency of product.
The technical solution of the utility model is:
A kind of warm forming particular manufacturing craft of magnesium alloy shell of cell phone has punch, blank holder, pull and stretch die, and the pull and stretch die of this mould adopts sectional type combination pull and stretch die, comprise fixedly die, fixedly can upper and lower mobile shaping cushion block in the die center drilling.
This mould only in die, be equipped with uniform heater finish blank and mould common add heat request.Described fixedly die sidewall radially evenly is equipped with resistor rod.
Described fixedly die bottom is provided with backing plate, and the connecting bolt external part that passes backing plate places fixedly die center drilling, is set with spring on the connecting bolt, and the shaping cushion block is installed on the connecting bolt external part, and the shaping cushion block is held by spring, constitutes automatic head part device.
Advantage of the present utility model is:
(1) stock utilization height.
(2) products surface quality is good, adopts the utility model, and the magnesium alloy shell of cell phone surface quality of manufacturing is good, rigidity strong, good hand touch, dimensionally stable.
(3) the utility model adopts warm drawing and forming, 170 ℃~180 ℃ of forming temperatures are lower than 250 ℃ of the dark temperature of common magnesium alloy hot-drawn, and low forming temperature can reduce the complexity of operation, enhance productivity and alleviated die wear, prolong its service life.
(4) PTFE (polytetrafluoroethylene (PTFE)) of the utility model employing liquid is lubricated the privileged site of die, blank holder and blank, this lubricant is not volatile, easy to use, the drawback of bringing in the time of can avoiding using some conventional lubricant is as easy cleaning and lubricating layer are not inhomogeneous.
(5) the utility model device is simple, and production cost is low, improves Mg alloy formed performance.The utility model adopts sectional type combination pull and stretch die on mould structure, make die change simple, can improve 3 times die life, and the shaping cushion block that makes up the pull and stretch die has simultaneously improved the stress of drip molding, improves yield rate.
(6) the utility model mould only in die, be equipped with uniform heater finish blank and mould common add heat request, reduced the blank temperature reduction, and reduced die cost.
Description of drawings
Fig. 1 is the utility model die structure dwg.Among the figure: 1, backing plate; 2, fixing die; 3, resistor rod bottoming hole; 4, blank holder; 5, alignment pin; 6, punch; 7, fixed head; 8, blank; 9, connecting bolt; 10, shaping cushion block; 11, spring.
Fig. 2 is the section of structure of punch.
Fig. 3 is the upward view of Fig. 2.
Fig. 4 is the fixing vertical view of die.
Fig. 5 is the A-A profile of Fig. 4.
Fig. 6 is the section of structure of the shaping cushion block in the die.
Fig. 7 is the vertical view of Fig. 6.
The specific embodiment
As shown in Figure 1, the warm forming particular manufacturing craft of magnesium alloy shell of cell phone comprises backing plate 1, fixedly die 2, resistor rod bottoming hole 3, blank holder 4, alignment pin 5, punch 6, fixed head 7, blank 8, connecting bolt 9, shaping cushion block 10, spring 11 etc., punch 6 is fixed on the upper bolster by fixed head 7, sectional type combination pull and stretch die is by backing plate 1, fixedly die 2, resistor rod bottoming hole 3, shaping cushion block 10 are formed, and shaping cushion block 10 passes through connecting bolt 9 and is connected with backing plate 1 with spring 11.
Shown in Fig. 1 and Fig. 2-3, punch 6 of the present utility model is a square structure, and its bottom surface is the phone housing shape.
Shown in Fig. 4-5, fixedly die 2 of the present utility model is a disc-shaped structure, and its side offers resistor rod bottoming hole 3.
Shown in Fig. 1 and Fig. 6-7, shaping cushion block 10 of the present utility model is upper surface and punch 6 corresponding square structures.
The mild hot formation method of the utility model magnesium alloy shell of cell phone, its flow process is as follows: heating blank holder and die → mould are coated with lubricant → blank and are coated with lubricant → blank heating → punch preheating → drawing and forming.Concrete warm forming step is as follows:
1) heating blank holder and die
10 of the resistor rods that even placement power is the 300W/ root in die are heated to 170 ℃~180 ℃ with blank holder and die;
2) mold lubrication and blank heating
Blank holder and die are heated to 170 ℃~180 ℃, evenly smear lubricant PTFE (polytetrafluoroethylene (PTFE)) on die, blank holder and blank, the part that punch and blank contact with punch is not coated with lubricant; Blank is put into mould, be heated to 170 ℃~180 ℃, insulation 2~5min;
3) punch is preheated to 80~100 ℃;
4) drawing and forming, forming speed are 0.5~2mm/s;
Punch 6 moves downward under the hydraulic press effect, speed is controlled at 0.5~2mm/s, behind the punch contact blank 8, promote shaping cushion block 10 associated movements in the die, spring 11 is compressed, and the cushion block that is shaped simultaneously applies opposition to blank, after drawing and forming reaches the predetermined deformation amount, rise punch 6, spring 11 resets, and ejects drip molding; Put blank holder and continue the next part of heating shaping.
Embodiment
Choose magnesium alloy AZ31 rolled sheet metal, be machined to 120mm * 70mm, radius of corner is the 30mm blank.After above-mentioned technology drawing and forming reaches the predetermined deformation amount, rise punch, spring reset ejects drip molding, and the magnesium alloy shell of cell phone surface quality of employing the utility model manufacturing is good, rigidity strong, shape and size precision height.
The process technological parameter is as shown in the table:
Sotck thinkness/mm Blank holder and die heating-up temperature/℃ Blank temperature retention time/min Punch preheat temperature ℃ Pull and stretch speed/mm/s
0.6 170 5 70 0.5
0.7 175 4 90 1
0.7 180 2 100 2

Claims (3)

1, a kind of warm forming particular manufacturing craft of magnesium alloy shell of cell phone, have punch, blank holder, pull and stretch die, it is characterized in that: the pull and stretch die of this mould adopts sectional type combination pull and stretch die, comprise fixedly die (2), fixedly can upper and lower mobile shaping cushion block (10) in die (2) center drilling.
2, according to the warm forming particular manufacturing craft of the described magnesium alloy shell of cell phone of claim 1, it is characterized in that: described fixedly die (2) sidewall radially evenly is equipped with resistor rod (3).
3, according to the warm forming particular manufacturing craft of the described magnesium alloy shell of cell phone of claim 1, it is characterized in that: described fixedly die (2) bottom is provided with backing plate (1), connecting bolt (9) external part that passes backing plate (1) places fixedly die (2) center drilling, be set with spring (11) on the connecting bolt (9), shaping cushion block (10) is installed on connecting bolt (9) external part, shaping cushion block (10) is held by spring (11), constitutes automatic head part device.
CN 200520091994 2005-07-29 2005-07-29 Warm shaping mould special for magnesium alloy mobile phone shell Expired - Fee Related CN2907951Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520091994 CN2907951Y (en) 2005-07-29 2005-07-29 Warm shaping mould special for magnesium alloy mobile phone shell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200520091994 CN2907951Y (en) 2005-07-29 2005-07-29 Warm shaping mould special for magnesium alloy mobile phone shell

Publications (1)

Publication Number Publication Date
CN2907951Y true CN2907951Y (en) 2007-06-06

Family

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Family Applications (1)

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CN 200520091994 Expired - Fee Related CN2907951Y (en) 2005-07-29 2005-07-29 Warm shaping mould special for magnesium alloy mobile phone shell

Country Status (1)

Country Link
CN (1) CN2907951Y (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100361762C (en) * 2005-07-29 2008-01-16 中国科学院金属研究所 Mild hot formation method for making magnesium alloy shell of cell phone and mould specially for the same
CN102151752A (en) * 2010-12-10 2011-08-17 重庆大学 Stamping mould with movable draw bead
CN102284639A (en) * 2011-07-26 2011-12-21 句容峰岭科技有限公司 Precision punching process
CN102554567A (en) * 2011-12-28 2012-07-11 深圳市宝福珠宝首饰有限公司 Manufacturing method of platinum bar and platinum bar mould-pressing device
CN102716980A (en) * 2012-05-31 2012-10-10 芜湖博大机械制造有限责任公司 Stamping die for intra-threshold connection plate of automobile
CN102829999A (en) * 2012-08-03 2012-12-19 江苏大学 Warm type high-speed forming device for experiments
CN103447297A (en) * 2013-07-29 2013-12-18 中色科技股份有限公司 Method of vertical span allocation of coiling position and stripping position for cold rolling mill
CN105033071A (en) * 2015-09-18 2015-11-11 吉林大学 Die capable of controlling part thermoforming damage distribution
CN106270082A (en) * 2016-09-29 2017-01-04 广东欧珀移动通信有限公司 A kind of metal shell processing technique and terminal
CN106346346A (en) * 2016-08-29 2017-01-25 深圳天珑无线科技有限公司 Mobile terminal shell, mobile terminal shell mold and processing method
CN107199287A (en) * 2017-01-25 2017-09-26 蔡振豪 The manufacture method and particular manufacturing craft of a kind of phone housing
CN107490520A (en) * 2017-10-16 2017-12-19 安徽工业大学 A kind of detection method of thin plate limited drawing ratio
CN107790539A (en) * 2017-10-26 2018-03-13 杨晓艳 A kind of magnesium alloy punched technique
CN107838351A (en) * 2017-10-26 2018-03-27 杨晓艳 The processing molding method and purposes of a kind of magnesium alloy sheet

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100361762C (en) * 2005-07-29 2008-01-16 中国科学院金属研究所 Mild hot formation method for making magnesium alloy shell of cell phone and mould specially for the same
CN102151752A (en) * 2010-12-10 2011-08-17 重庆大学 Stamping mould with movable draw bead
CN102151752B (en) * 2010-12-10 2012-09-05 重庆大学 Stamping mould with movable draw bead
CN102284639A (en) * 2011-07-26 2011-12-21 句容峰岭科技有限公司 Precision punching process
CN102554567A (en) * 2011-12-28 2012-07-11 深圳市宝福珠宝首饰有限公司 Manufacturing method of platinum bar and platinum bar mould-pressing device
CN102554567B (en) * 2011-12-28 2014-05-14 深圳市宝福珠宝首饰有限公司 Manufacturing method of platinum bar and platinum bar mould-pressing device
CN102716980A (en) * 2012-05-31 2012-10-10 芜湖博大机械制造有限责任公司 Stamping die for intra-threshold connection plate of automobile
CN102829999A (en) * 2012-08-03 2012-12-19 江苏大学 Warm type high-speed forming device for experiments
CN103447297A (en) * 2013-07-29 2013-12-18 中色科技股份有限公司 Method of vertical span allocation of coiling position and stripping position for cold rolling mill
CN103447297B (en) * 2013-07-29 2015-09-02 中色科技股份有限公司 A kind of cold-rolling mill is rolled up position and unload the method for volume position vertically passing across configuration
CN105033071B (en) * 2015-09-18 2017-03-22 吉林大学 Die capable of controlling part thermoforming damage distribution
CN105033071A (en) * 2015-09-18 2015-11-11 吉林大学 Die capable of controlling part thermoforming damage distribution
CN106346346A (en) * 2016-08-29 2017-01-25 深圳天珑无线科技有限公司 Mobile terminal shell, mobile terminal shell mold and processing method
CN106270082A (en) * 2016-09-29 2017-01-04 广东欧珀移动通信有限公司 A kind of metal shell processing technique and terminal
CN106270082B (en) * 2016-09-29 2019-08-02 Oppo广东移动通信有限公司 A kind of metal shell processing technology and terminal
CN107199287A (en) * 2017-01-25 2017-09-26 蔡振豪 The manufacture method and particular manufacturing craft of a kind of phone housing
CN107199287B (en) * 2017-01-25 2019-12-10 蔡振豪 Manufacturing method of mobile phone shell and special die
CN107490520A (en) * 2017-10-16 2017-12-19 安徽工业大学 A kind of detection method of thin plate limited drawing ratio
CN107490520B (en) * 2017-10-16 2019-07-19 安徽工业大学 A kind of detection method of thin plate limited drawing ratio
CN107790539A (en) * 2017-10-26 2018-03-13 杨晓艳 A kind of magnesium alloy punched technique
CN107838351A (en) * 2017-10-26 2018-03-27 杨晓艳 The processing molding method and purposes of a kind of magnesium alloy sheet

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CF01 Termination of patent right due to non-payment of annual fee
C19 Lapse of patent right due to non-payment of the annual fee