CN108246951B - The hot rotary roll method of metal hand casing - Google Patents
The hot rotary roll method of metal hand casing Download PDFInfo
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- CN108246951B CN108246951B CN201810174899.7A CN201810174899A CN108246951B CN 108246951 B CN108246951 B CN 108246951B CN 201810174899 A CN201810174899 A CN 201810174899A CN 108246951 B CN108246951 B CN 108246951B
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- yaw
- blank
- hand casing
- metal hand
- lower die
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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
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- 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, comprising the following steps: S1, production blank；S2, blank is heated under protective atmosphere, the blank after heating is placed in lower die, yaw is placed above blank；The multiple ejector beams of setting in the lower die；S3, lower die drive blank 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 high production efficiency, stock utilization are high, production cost is low.Pendulum, which is rolled over, can refine grain structure, can form continuous metal streamline, 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 technique
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.Currently, metal hand casing mainly uses machining to be produced.
The machining period is long, production efficiency is low, stock utilization is low, high production cost.And machining cannot refine crystal grain group
It knits, continuous metal streamline cannot be formed, 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, high production efficiency, stock utilization are high, production cost is low.Importantly, pendulum, which is rolled over, can refine grain structure, it can be with shape
At 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.Currently, the report for rolling over accurate forming method is put about metal hand casing heat not yet.
Summary of the invention
The technical problem to be solved in the present invention is that providing a kind of hot rotary roll method of metal hand casing.
The technical solution adopted by the present invention to solve the technical problems is: constructing a kind of hot rotary roll side of metal hand casing
Method, comprising the following steps:
S1, production blank；
S2, blank is heated under protective atmosphere, the blank after heating is placed in lower die, yaw is placed above blank；
The multiple ejector beams of setting in the lower die；
S3, lower die drive blank close to yaw, and the hot rotary roll under mould action, metal hand casing inner surface is put
Head space envelope forming.
In above scheme, the blank be approximate rectangular plate, blank material select stainless steel, aluminium alloy, magnesium alloy or
Titanium alloy.
In above scheme, shown in the motion profile such as equation (1) of yaw surface any point:
Wherein, coordinate system is located at yaw conical point, and (x, y, z) is yaw surface any point coordinate, and γ is yaw inclination angle
Degree, ω is double eccentric sleeves rotational angular velocity, and t is the time.
In above scheme, yaw geometry computations formula is that equation (2) are described:
Wherein, (x1,y1,z1) it is metal hand casing forging inner surface any point coordinate, (x, y, z) is that yaw surface is any
Point coordinate, H are the vertical ranges for putting rolling center to mobile phone shell forging inner surface.
In above scheme, MoS is first smeared after the blank heating2Then lubricant places into lower die.
Implement the hot rotary roll method of metal hand casing of the invention, has 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, causes upper and lower mould 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.Currently, metal hand casing mainly uses machining to be produced.Machining week
Phase is long, production efficiency is low, stock utilization is low, high production cost.And machining cannot refine grain structure, cannot 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, high production efficiency, stock utilization are high, production cost is low.
(2) heat pendulum, which is rolled over, can refine grain structure, can form continuous metal streamline, 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.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, 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
A specific embodiment of the invention.
Such as Fig. 1 and Fig. 2, the three-dimensional dimension of metal hand casing to be processed are as follows: length 142mm, width 68mm, thickness
10mm.Its hot rotary roll method the following steps are included:
(1) forging designs.Increase the machining allowance of 0.2mm~0.4mm in metal hand casing part single side, preferably
0.3mm guarantees that the subsequent CNC a second processing of the metal hand casing forging of rotary roll is completed；Overlap design table in mobile phone shell
Face marginal position, to guarantee 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 at 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, and the length is 142mm, width 68mm.Metal hand casing
Pendulum roll over blank 2 with a thickness of 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 continuous multi-pass space of yaw 1 of special exercise track
Envelope forming.
(5) yaw 1 moves.Since metal hand casing is non-rotating part, to guarantee that its inner surface complex three-dimensional knot is constituted
Shape precision, yaw 1 are required to return to initial position around the every rotation of vertical axis after a week.The motion profile 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 1 surface any point coordinate 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.Yaw 1 is a type face and the cone that 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 metal hand casing forging inner surface any point coordinate, (x, y, z) is that yaw surface is any
Point coordinate, H are the vertical ranges for putting rolling center to mobile phone shell forging inner surface.Pendulum is rolled over 3 type chamber of lower die and is passed through and 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 that step (2) geomery is obtained by punching press, the blank 2 after heating smear 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 with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (3)
1. a kind of hot rotary roll method of metal hand casing, which comprises the following steps:
S1, production blank；
S2, blank is heated under protective atmosphere, the blank after heating is placed 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；
Shown in the motion profile such as equation (1) of yaw surface any point:
Wherein, coordinate system is located at yaw conical point, and (x, y, z) is yaw surface any point coordinate, and γ is yaw tilt angle, ω
It is double eccentric sleeves rotational angular velocity, t is the time；
Yaw geometry computations formula is shown in equation (2):
Wherein, (x1,y1,z1) it is metal hand casing forging inner surface any point coordinate, (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.
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 2, which is characterized in that after the blank heating first
Smear MoS2Then lubricant places 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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| CN108246951A CN108246951A (en) | 2018-07-06 |
| CN108246951B true CN108246951B (en) | 2019-10-25 |
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| CN109127975B (en) * | 2018-10-17 | 2020-05-08 | 重庆文理学院 | Titanium alloy rotating member 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 |
| 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 |
| CN110918849B (en) * | 2019-11-26 | 2020-12-22 | 武汉理工大学 | Method for improving forming limit of thin-wall high-rib component space envelope forming high rib |
| 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 |
| CN110918846B (en) * | 2019-11-26 | 2021-03-16 | 武汉理工大学 | Space envelope forming method of clutch outer hub 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 |
| CN113083933B (en) * | 2021-03-26 | 2022-12-23 | 武汉理工大学 | Preparation method of large-sized ultrafine-grained isotropic plate |
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