CN108246951A - The hot rotary roll method of metal hand casing - Google Patents
The hot rotary roll method of metal hand casing Download PDFInfo
- Publication number
- CN108246951A CN108246951A CN201810174899.7A CN201810174899A CN108246951A CN 108246951 A CN108246951 A CN 108246951A CN 201810174899 A CN201810174899 A CN 201810174899A CN 108246951 A CN108246951 A CN 108246951A
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- yaw
- blank
- hand casing
- metal hand
- rotary roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/12—Forming profiles on internal or external surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K21/00—Making hollow articles not covered by a single preceding sub-group
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- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The present invention relates to a kind of hot rotary roll methods of metal hand casing, include the following steps：S1, blank is made；S2, blank is heated under protective atmosphere, the blank after heating is positioned in lower die, yaw is placed above blank；The multiple ejector beams of setting in the lower die；S3, lower die drive blank are close to yaw, and the hot rotary roll under mould action, metal hand casing is shaped by yaw space envelope.The present invention is by monolithic molding metal hand casing of yaw space envelope, and production efficiency is high, stock utilization is high, production cost is low.Pendulum, which is rolled over, can form continuous metal streamline with crystal grain thinning tissue, can further improve the mechanical strength and wearability of metal hand casing.
Description
Technical field
The present invention relates to mobile phone shell processing and manufacturing technologies, more specifically, are related to a kind of metal hand casing heat pendulum
Roll over manufacturing process.
Background technology
The metal strengths such as stainless steel, aluminium alloy are high, wearability is good, are widely used in the high-grade mobile phone shell of manufacture.Metal hand casing
Belong to sheet parts, and inner surface has complicated three-dimensional structure.According to integral forging and forming metal hand casing, due to height
Diameter occurs deformation dead zone than too small, in workpiece, and upper and lower mould is caused rigidly to hit, and not only drag is big, seriously damages mold, but also
It is unable to form metal mobile phone shell inner surface complex three-dimensional structure.At present, metal hand casing is mainly produced using machining.
Machining period length, low production efficiency, stock utilization is low, production cost is high.And machining is unable to crystal grain thinning group
It knits, it is impossible to form continuous metal streamline, thus be difficult to manufacture high-performance metal mobile phone shell.
It is successive partial plastic forming new technology that pendulum, which is rolled over, can be with direct forming metal hand casing inner surface complex three-dimensional knot
Structure, production efficiency is high, stock utilization is high, production cost is low.Importantly, pendulum rolling can be with crystal grain thinning tissue, it can be with shape
Into continuous metal streamline, the mechanical strength and wearability of metal hand casing can further improve.It is high-performance metal hand that pendulum, which is rolled over,
The developing direction of casing advanced manufacturing technology.At present, there are no the reports that rolling accurate forming method is put about metal hand casing heat.
Invention content
The technical problem to be solved in the present invention is, provides a kind of metal hand casing hot rotary roll method.
The technical solution adopted by the present invention to solve the technical problems is：Construct a kind of hot rotary roll side of metal hand casing
Method includes the following steps：
S1, blank is made；
S2, blank is heated under protective atmosphere, the blank after heating is positioned in lower die, yaw is placed above blank；
The multiple ejector beams of setting in the lower die；
S3, lower die drive blank are close to yaw, and the hot rotary roll under mould action, metal hand casing inner surface is put
Head space envelope forming.
In said program, the blank be approximate rectangular plate, blank material select stainless steel, aluminium alloy, magnesium alloy or
Titanium alloy.
In said program, shown in the movement locus such as equation (1) of yaw surface any point：
Wherein, coordinate system is located at yaw conical point, and (x, y, z) is any point coordinates in yaw surface, and γ is yaw inclination angle
Degree, ω is double eccentric sleeves rotational angular velocity, and t is the time.
In said program, yaw geometry computations formula is equation (2) described：
Wherein, (x1,y1,z1) it is any point coordinates of metal hand casing forging inner surface, (x, y, z) is that yaw surface is any
Point coordinates, H are the vertical ranges for putting rolling center to mobile phone shell forging inner surface.
In said program, MoS is first smeared after the blank heating2Then lubricant is placed into lower die.
Implement the hot rotary roll method of metal hand casing of the present invention, have the advantages that：
(1) metal hand casing has a large capacity and a wide range, according to integral forging and forming metal hand casing, since ratio of height to diameter is too small, work
Occur deformation dead zone in part, upper and lower mould is caused rigidly to hit, not only drag is big, seriously damages mold, but also cannot shape gold
Belong to mobile phone shell inner surface complex three-dimensional structure.At present, metal hand casing is mainly produced using machining.Machining week
Phase length, low production efficiency, stock utilization is low, production cost is high.And machining is unable to crystal grain thinning tissue, it is impossible to be formed
Continuous metal streamline, thus be difficult to manufacture high-performance metal mobile phone shell.The present invention by yaw space envelope once integral into
Shape metal hand casing, production efficiency is high, stock utilization is high, production cost is low.
(2) heat pendulum is rolled over and can be formed continuous metal streamline with crystal grain thinning tissue, can further improve metallic mobile phone
The mechanical strength and wearability of shell.
(3) present invention provides one kind for the manufacture of high-end handsets shell and innovates technologies, and will effectively promote high-end handsets manufacturing industry
Development.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached drawing：
Fig. 1 is metal hand casing inner surface schematic diagram；
Fig. 2 is metal hand casing outer surface schematic diagram；
Fig. 3 is metal hand casing forging schematic diagram；
Fig. 4 is that heat pendulum rolles over yaw threedimensional model schematic diagram；
Fig. 5 is that heat pendulum rolles over lower die threedimensional model schematic diagram；
Fig. 6 is that metal hand casing heat pendulum rolles over precision form schematic diagram.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
The specific embodiment of the present invention.
Such as Fig. 1 and Fig. 2, the three-dimensional dimension of metal hand casing to be processed is：Length 142mm, width 68mm, thickness
10mm.Its hot rotary roll method includes the following steps：
(1) forging designs.Increase the machining allowance of 0.2mm~0.4mm in metal hand casing part single side, preferably
0.3mm ensures that follow-up CNC a second processing of metal hand casing forging of rotary roll is completed；Overlap design table in mobile phone shell
Face marginal position, to ensure that the filling of inner surface complex three-dimensional structure is full, flash thickness is designed as 0.8mm~1.0mm, preferably
1.0mm, and overlap and horizontal plane are into 30 °~60 ° inclination angles, preferably 45 ° of inclination angles.Metal hand casing forging is as shown in Figure 3.
(2) blank 2 designs.Blank 2 is designed as rectangular plate, the length of 142mm, width 68mm.Metal hand casing
The thickness that pendulum rolles over blank 2 is 5mm.
(3) blank 2 pre-processes.2 material of blank can select stainless steel, aluminium alloy, magnesium alloy or titanium alloy, metallic mobile phone
Shell uses hot rotary roll.When blank material selects 304 stainless steel, stainless steel blank is heated to 1150 DEG C under protective atmosphere.
When blank material selects aluminium alloy, aluminum alloy blank is heated to 450 DEG C under protective atmosphere.When blank material selects magnesium alloy,
Magnesium alloy blank is heated to 350 DEG C under protective atmosphere.When blank material selects titanium alloy, titanium alloy blank is under protective atmosphere
It is heated to 950 DEG C.
(4) metal hand casing inner surface complex three-dimensional structure is by making the 1 continuous multi-pass space of yaw of special exercise track
Envelope shapes.
(5) yaw 1 moves.Since metal hand casing is non-rotating part, to ensure that its inner surface complex three-dimensional knot is formed
Shape precision, yaw 1 is often rotated around vertical axis is required to return to initial position after a week.The movement locus of 1 surface any point of yaw
As shown in equation (1).
Wherein, coordinate system is located at 1 conical point of yaw, and (x, y, z) is any point coordinates in 1 surface of yaw, and γ is that yaw 1 tilts
Angle, ω are double eccentric sleeves rotational angular velocities, and t is the time.
(6) mold design.The cone that yaw 1 is a type face and mobile phone shell forging inner surface matches, the cone of yaw 1
Vertex is located on the axis of mobile phone shell geometric center, and 1 geometry of yaw is calculated by equation (2).1 threedimensional model schematic diagram of yaw
As shown in Figure 4.
Wherein, (x1,y1,z1) it is any point coordinates of metal hand casing forging inner surface, (x, y, z) is that yaw surface is any
Point coordinates, H are the vertical ranges for putting rolling center to mobile phone shell forging inner surface.Pendulum roll over 3 cavity of lower die by with mobile phone shell forging
Outer surface is done Boolean calculation and is obtained, as shown in Figure 5.
(7) ejecting mechanism designs.Thin-wall metal mobile phone shell depanning deformation is rolled over to reduce to put, multiple ejector beams 4 are set.Wherein
3 ejector beams 4 are respectively set along forging length and width direction, as shown in Figure 6.
(8) blank 2 of step (2) geomery is obtained by punching press, the blank 2 after heating smears MoS2Lubricant, then
Pendulum is put into roll in lower die 3.Yaw 1 is moved according to equation (1), and lower die 3 drives blank 2 close to yaw 1, under mould action,
Metal hand casing is shaped by 1 space envelope of yaw.It is as shown in Figure 6 that metal hand casing pendulum rolles over precision form schematic diagram.
The embodiment of the present invention is described above in conjunction with attached drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned specific embodiment is only schematical rather than restricted, those of ordinary skill in the art
Under the enlightenment of the present invention, present inventive concept and scope of the claimed protection are not being departed from, can also made very much
Form, these are belonged within the protection of the present invention.
Claims (5)
- A kind of 1. hot rotary roll method of metal hand casing, which is characterized in that include the following steps：S1, blank is made；S2, blank is heated under protective atmosphere, the blank after heating is positioned in lower die, yaw is placed above blank；It is described The multiple ejector beams of setting in lower die；S3, lower die drive blank close to yaw, the hot rotary roll under mould action, and metal hand casing inner surface is by yaw sky Between envelope shape.
- 2. the hot rotary roll method of metal hand casing according to claim 1, which is characterized in that the blank is approximate square Shape plate, blank material select stainless steel, aluminium alloy, magnesium alloy or titanium alloy.
- 3. the hot rotary roll method of metal hand casing according to claim 1, which is characterized in that yaw surface any point Shown in movement locus such as equation (1)：Wherein, coordinate system is located at yaw conical point, and (x, y, z) is any point coordinates in yaw surface, and γ is yaw angle of inclination, ω It is double eccentric sleeves rotational angular velocity, t is the time.
- 4. the hot rotary roll method of metal hand casing according to claim 1, which is characterized in that yaw geometry computations Formula is equation (2) described：Wherein, (x1,y1,z1) it is any point coordinates of metal hand casing forging inner surface, (x, y, z) is that yaw surface any point is sat Mark, H are the vertical ranges for putting rolling center to mobile phone shell forging inner surface.
- 5. the hot rotary roll method of metal hand casing according to claim 2, which is characterized in that after the blank heating first Smear MoS2Then lubricant is placed into lower die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810174899.7A CN108246951B (en) | 2018-03-02 | 2018-03-02 | The hot rotary roll method of metal hand casing |
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| CN201810174899.7A CN108246951B (en) | 2018-03-02 | 2018-03-02 | The hot rotary roll method of metal hand casing |
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| CN108246951B CN108246951B (en) | 2019-10-25 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109127975A (en) * | 2018-10-17 | 2019-01-04 | 重庆文理学院 | A kind of titanium alloy rotation part and preparation method thereof |
| CN109365699A (en) * | 2018-10-17 | 2019-02-22 | 重庆文理学院 | A kind of preparation method of the titanium alloy rotation part of good toughness |
| CN110479838A (en) * | 2019-08-02 | 2019-11-22 | 武汉理工大学 | The split type space envelope manufacturing process of ultra-large type thin-walled entirety store-vessel bottom |
| CN110918846A (en) * | 2019-11-26 | 2020-03-27 | 武汉理工大学 | Space envelope forming method of clutch outer hub component |
| CN110918849A (en) * | 2019-11-26 | 2020-03-27 | 武汉理工大学 | Method for improving forming limit of thin-wall high-rib component space envelope forming high rib |
| CN111375716A (en) * | 2019-11-26 | 2020-07-07 | 武汉理工大学 | Space envelope forming method for thin-wall high-strength aircraft window frame component |
| CN112453301A (en) * | 2020-11-02 | 2021-03-09 | 武汉理工大学 | Hot rotary forging forming method for titanium alloy high-rib connecting piece |
| CN113083933A (en) * | 2021-03-26 | 2021-07-09 | 武汉理工大学 | Preparation method of large-size ultrafine-grained isotropic plate |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109127975A (en) * | 2018-10-17 | 2019-01-04 | 重庆文理学院 | A kind of titanium alloy rotation part and preparation method thereof |
| CN109365699A (en) * | 2018-10-17 | 2019-02-22 | 重庆文理学院 | A kind of preparation method of the titanium alloy rotation part of good toughness |
| CN109127975B (en) * | 2018-10-17 | 2020-05-08 | 重庆文理学院 | Titanium alloy rotating member and preparation method thereof |
| CN110479838A (en) * | 2019-08-02 | 2019-11-22 | 武汉理工大学 | The split type space envelope manufacturing process of ultra-large type thin-walled entirety store-vessel bottom |
| CN110479838B (en) * | 2019-08-02 | 2020-09-01 | 武汉理工大学 | Split type space enveloping forming method for bottom of ultra-large thin-wall integral storage tank |
| CN110918846A (en) * | 2019-11-26 | 2020-03-27 | 武汉理工大学 | Space envelope forming method of clutch outer hub component |
| CN110918849A (en) * | 2019-11-26 | 2020-03-27 | 武汉理工大学 | Method for improving forming limit of thin-wall high-rib component space envelope forming high rib |
| CN111375716A (en) * | 2019-11-26 | 2020-07-07 | 武汉理工大学 | Space envelope forming method for thin-wall high-strength aircraft window frame component |
| CN111375716B (en) * | 2019-11-26 | 2021-04-20 | 武汉理工大学 | Space envelope forming method for thin-wall high-strength aircraft window frame component |
| CN112453301A (en) * | 2020-11-02 | 2021-03-09 | 武汉理工大学 | Hot rotary forging forming method for titanium alloy high-rib connecting piece |
| CN113083933A (en) * | 2021-03-26 | 2021-07-09 | 武汉理工大学 | Preparation method of large-size ultrafine-grained isotropic plate |
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| CN108246951B (en) | 2019-10-25 |
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