CN112327748B - Mobile terminal, metal middle frame and contour curved surface processing method thereof - Google Patents
Mobile terminal, metal middle frame and contour curved surface processing method thereof Download PDFInfo
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- CN112327748B CN112327748B CN202011174952.7A CN202011174952A CN112327748B CN 112327748 B CN112327748 B CN 112327748B CN 202011174952 A CN202011174952 A CN 202011174952A CN 112327748 B CN112327748 B CN 112327748B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/35—Nc in input of data, input till input file format
- G05B2219/35349—Display part, programmed locus and tool path, traject, dynamic locus
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Abstract
The application provides a mobile terminal, a metal middle frame and a method for processing an outline curved surface of the metal middle frame. The processing method of the contour curved surface of the metal middle frame is realized on the basis of a cutter with an inward-concave arc processing cutter edge, the diameter of the arc processing cutter edge is D, and the processing method comprises the following steps: fitting a corner outline of the metal middle frame, wherein an intersection line of a plane perpendicular to the corner outline and a corner outline, where a connecting line of points at corresponding positions of a top line and a bottom line of the corner outline is located, is an arc line with the diameter of D; extracting a center line of the outline of the corner, symmetrically mirroring the center line to the long side and the short side of the metal middle frame to form a maximum boundary line of the outline of the metal middle frame, and programming by taking the maximum boundary line of the outline of the metal middle frame as a path line processed by a cutter; the metal middle frame is machined according to the programmed trajectory line using a cutter.
Description
Technical Field
The application relates to the technical field of curved surface processing, in particular to a method for processing an outline curved surface of a metal middle frame, the metal middle frame manufactured by the processing method and a mobile terminal.
Background
With the trend of ultra-thinning and screen-enlarging of mobile terminals such as smart phones, in order to enhance the overall strength and improve the user touch experience, metal middle frames have been adopted as the bodies of the mobile terminals on a large scale.
In the processing process of the appearance surface of the metal middle frame, two different cutters, namely a drum cutter and a forming cutter, are generally used for processing. Namely, in which a forming cutter is used to machine long/short sides of a metal middle frame and a drum cutter is used to machine corners of the metal middle frame. However, in this machining method, it is difficult to adjust the machining time during machining, and it is easy to cause the adjacent machining positions machined by the two tools to be connected unevenly, and it is difficult to remove the joint mark.
Disclosure of Invention
In view of this, it is necessary to provide a metal middle frame, a method for processing a curved surface of an external shape thereof, and a mobile terminal having the metal middle frame, so as to solve the technical problem of poor connection at adjacent processing positions in the process of processing an external surface of the metal middle frame by using two different tools.
The application provides a shape curved surface processing method of metal center, based on the cutter realization that has the circular arc processing edge of an inwards sunken circle, the cutter is the rotator that forms by the rotation of surface of revolution around the rotation axis, and the diameter of circular arc processing edge is D, and metal center uses in mobile terminal, shape curved surface processing method includes:
fitting a corner outline of the metal middle frame, wherein a connecting line of two points at corresponding positions on a top line and a bottom line of the corner outline is vertical to a main plane of the mobile terminal, and an intersecting line of a plane vertical to the corner outline and a corner outline, where the connecting line of the points at the corresponding positions of the top line and the bottom line is vertical to the corner outline, is an arc line with the diameter of D;
extracting a central line of the corner outline, wherein each point on the central line is a midpoint of a corresponding intersection line of a plane perpendicular to the corner outline and the corner outline;
the central line of the outline of the corner is symmetrically mirrored to the long side and the short side of the metal middle frame to form the maximum boundary line of the outline of the metal middle frame,
programming the maximum boundary line of the outline of the metal middle frame as a path line for machining a cutter;
and (3) processing the metal middle frame by using the cutter according to the programmed trajectory, before processing, ensuring that the rotating shaft of the cutter is vertical to the main plane of the mobile terminal, and the arc midpoint of the longitudinal section of the arc processing knife edge of the cutter is superposed with the trajectory processed by the cutter.
And the top line and the bottom line of the corner outline of the metal middle frame are consistent with the requirements of the metal middle frame of the mobile terminal.
Wherein the step of fitting the outline of the metal middle frame comprises the following steps: extracting an initial corner profile at a corner position of a product drawing of the metal middle box;
the step of fitting the outline of the metal middle frame comprises the following steps: and fitting the corner outline of the metal middle frame according to the initial corner outline.
Wherein the step of fitting the corner profile of the metal middle frame comprises:
dividing the initial corner contour into a plurality of sections, wherein the dividing direction is vertical to the main plane direction of the mobile terminal,
searching a vertical plane of each section, wherein the vertical plane is vertical to a connecting line of two end points of the projection of the section in the main plane direction of the mobile terminal and is vertical to the main plane of the mobile terminal;
drawing a circle with the diameter D on each vertical plane;
translating the circle of diameter D in a vertical plane to intersect both the top and bottom of the initial corner profile;
trimming off the part of each circle with the diameter D, which exceeds the top and the bottom of the initial corner profile, and generating a plurality of sections of circular arc lines formed between the top contour line and the bottom contour line of the initial corner profile;
and fitting a plurality of sections of circular arc lines formed between the top contour line and the bottom contour line of the initial corner contour into the corner outline by means of curve grids.
Wherein the step of dividing the corner profile into segments comprises: extracting a top contour line of the corner outline; equally dividing the top contour line to obtain a plurality of divided line segments;
the step of finding the vertical plane of each segment comprises: connecting two ends of each segment, finding out a vertical line of each connecting line, and stretching each vertical line along a direction vertical to the main plane of the mobile terminal into a sheet body to form a vertical plane of each segment of corner outline.
Wherein the step of translating the circle of diameter D in a vertical plane to intersect both the top and the bottom of the initial corner profile comprises:
extracting a bottom contour line of the corner outline and a plurality of vertical lines correspondingly projected on a plane where the bottom contour line is located when a plurality of vertical lines are formed;
connecting points corresponding to the top contour line and the bottom contour line by using a connecting line;
moving the center of a circle with the diameter D on each vertical plane to the midpoint of the connecting line;
translating the circle of diameter D in a direction parallel to a major plane of the mobile terminal to intersect both the top and the bottom of the initial corner profile.
Wherein the step of extracting the centerline of the corner outline comprises:
drawing a center line parallel to the vertical line through the center of the circle with the diameter D;
when the circle with the diameter D intersects with the top and the bottom of the initial corner outline, the point, which is located on the corner outline and is intersected with the circle with the diameter D, of the center line is the midpoint, and the connecting line of the midpoints on the corner outline is the center line of the corner outline.
The application also provides the metal middle frame which is manufactured by adopting the method for processing the contour curved surface of the metal middle frame.
The application also provides a mobile terminal which comprises the metal middle frame, wherein the metal middle frame is manufactured by adopting the method for processing the contour curved surface of the metal middle frame.
Compared with the prior art, the intersection line of the plane perpendicular to the corner outline where the connecting line of the points of the corresponding positions of the top line and the bottom line of the corner outline of the metal middle frame is located and the corner outline is an arc line with the diameter of D, the maximum boundary line of the metal middle frame outline is formed by symmetrically mirroring the extracted center line of the corner outline to the long side and the short side of the metal middle frame, the cutter is programmed according to the maximum boundary line of the outline as a processing track line and processes the metal middle frame accordingly, the diameter of the circular arc processing knife edge of the cutter is equal to the diameter of each contour line perpendicular to the main plane A of the mobile terminal on the corner outline, therefore, the cutter does not need to be switched in the processing process of the metal middle frame, and the processing surface at the connecting position of the corner of the outline and the long side or the short side is smooth and free of seams.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic structural diagram of a metal middle frame of the present application;
FIG. 2 is a schematic structural diagram of a cutter for machining the curved surface of the metal middle frame shown in FIG. 1;
FIG. 3 is a schematic flow chart of a first embodiment of the method for machining a curved surface of a metal middle frame according to the present application;
FIG. 4 is a schematic flow chart of a second embodiment of the method for machining a curved surface of a metal middle frame according to the present application;
FIG. 5 is a flow chart of a first embodiment of fitting the corner profile of the metal center in the method of contour surface machining of the metal center shown in FIG. 4;
FIG. 6 is a flow chart of a second embodiment of fitting the corner profile of the metal center in the method of contour surface machining of the metal center shown in FIG. 4;
FIG. 7 is a flow chart of a method for contour surface machining of the metal bezel of FIG. 4 to extract a centerline of the corner contour;
fig. 8a to 8k are exploded process diagrams of the steps of fitting the corner profile of the metal middle frame and extracting the centerline of the corner profile shown in the steps of fig. 6 and 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments.
The application protects a method for processing an outline curved surface of a metal middle frame 100, which is realized based on a cutter 20 with an inward-concave arc processing knife edge 21, wherein the cutter 20 is a rotating body formed by a rotating surface rotating around a rotating shaft, the diameter of the arc processing knife edge 21 is D, and the metal middle frame 100 is used in a mobile terminal.
Fig. 3 is a preferred embodiment of the method for processing the contour curved surface of the metal middle frame 100 of the present application, which specifically includes:
s10, fitting the corner outline 11 of the metal middle 100, wherein the connecting line of two points at corresponding positions on the top line 11a and the bottom line 11b of the corner outline 11 is vertical to the main plane A of the mobile terminal, and the intersecting line of the plane vertical to the corner outline and the corner outline, where the connecting line of the points at corresponding positions of the top line 11a and the bottom line 11b is vertical, is an arc line with the diameter of D;
in this step, the top line 11a and the bottom line 11b of the corner outline 11 of the metal middle frame 10 are consistent with the requirements of the metal middle frame of the mobile terminal, that is, consistent with the requirements of the external dimensions of the existing mobile terminal. The top line 11a and the bottom line 11b can be directly designed according to the length, width and height dimensions of the mobile terminal.
S11, extracting a central line of the corner outline 11, wherein each point on the central line is a midpoint of a corresponding intersection line of a plane perpendicular to the corner outline and the corner outline;
s12, symmetrically mirroring the center line of the corner outline to the long side and the short side of the metal middle frame to form the maximum boundary line of the metal middle frame outline,
s13, programming the maximum boundary line of the outline of the metal middle frame as a tool machining trajectory line;
and S14, processing the metal middle frame by using the cutter according to the programmed trajectory line, before starting processing, ensuring that the rotating shaft of the cutter is vertical to the main plane of the mobile terminal, and the arc midpoint of the longitudinal section of the arc processing edge of the cutter is superposed with the trajectory line processed by the cutter.
Fig. 4 is another preferred embodiment of the method for processing the contour curved surface of the metal middle frame 100 of the present application, which specifically includes:
s21, extracting initial corner contours at corner positions of the product drawing of the metal middle frame;
s22, fitting the corner outline of the metal middle frame according to the initial corner outline, wherein a connecting line of two points at corresponding positions on a top line 11a and a bottom line 11b of the corner outline 11 is vertical to the main plane A of the mobile terminal, and an intersecting line of a plane vertical to the corner outline and a corner outline, where the connecting line of the points at corresponding positions of the top line 11a and the bottom line 11b is located, is an arc line with the diameter of D;
s23, extracting a central line of the corner outline 11, wherein each point on the central line is a midpoint of a corresponding intersection line of a plane perpendicular to the corner outline and the corner outline;
s24, symmetrically mirroring the center line of the corner outline to the long side and the short side of the metal middle frame to form the maximum boundary line of the metal middle frame outline,
s25, programming the maximum boundary line of the outline of the metal middle frame as a tool machining trajectory line;
and S26, processing the metal middle frame by using the cutter according to the programmed trajectory line, before starting processing, ensuring that the rotating shaft of the cutter is vertical to the main plane of the mobile terminal, and the arc midpoint of the longitudinal section of the arc processing edge of the cutter is superposed with the trajectory line processed by the cutter.
In contrast to the previous embodiment, in this embodiment, the corner outline profile of the metal middle frame is fitted based on the product drawing of the known metal middle frame, which may be provided by the product development department.
Therefore, in this embodiment, before fitting the corner outline profile of the metal middle frame, the corner profile at the corner position of the product drawing of the metal middle frame needs to be extracted.
Fig. 5 shows a specific implementation manner of step S22:
s221, dividing the initial corner contour into a plurality of sections, wherein the dividing direction is vertical to the main plane direction of the mobile terminal,
s222, searching a vertical plane of each section, wherein the vertical plane is vertical to a connecting line of two end points of the projection of the section in the main plane direction of the mobile terminal and is vertical to the main plane of the mobile terminal;
s222, drawing a circle with the diameter D on each vertical plane;
s222, translating the circle with the diameter D on a vertical plane until the circle with the diameter D intersects with both the top and the bottom of the initial corner profile;
s225, trimming off the part, exceeding the top and the bottom, of each circle with the diameter D, of the initial corner outline to generate a plurality of sections of arc lines formed between the top contour line and the bottom contour line of the initial corner outline;
and S226, fitting a plurality of sections of arc lines formed between the top contour line and the bottom contour line of the initial corner contour into the corner outline by means of curve grids.
Fig. 6 shows another specific implementation manner of step S22:
s221', referring to fig. 8a, extracting a top contour line of the corner outline; equally dividing the top contour line to obtain a plurality of divided line segments,
this step corresponds to the step S221 in the previous embodiment, in which the corner outline is directly divided, and the top contour of the corner outline is extracted and divided into a plurality of divided line segments in this embodiment.
S222', please combine fig. 8b and 8c together, connect the two ends of each segment, find a vertical line of each connection, and stretch each vertical line along a direction perpendicular to the main plane of the mobile terminal into a sheet body to form a vertical plane of each corner profile;
this step corresponds to step S222 of the previous embodiment, and is used to find out a vertical plane perpendicular to both the corner outline and the main plane of the mobile terminal.
S223', please refer to fig. 8D together, drawing a circle with a diameter D on each vertical plane;
s224', extracting the bottom contour line of the corner outline and a plurality of vertical lines correspondingly projected on the plane where the bottom contour line is located when a plurality of vertical lines are formed;
s225', please combine with FIG. 8e together, connect the corresponding points of the top contour line and the bottom contour line by the connecting line;
s226', moving the center of a circle with the diameter of D on each vertical plane to the midpoint of the connecting line;
s227', translating the circle with the diameter D along a direction parallel to the main plane of the mobile terminal until the circle with the diameter D intersects with both the top and the bottom of the initial corner profile;
referring to fig. 8e to 8h, steps S224 'to S227' correspond to step S224 of the previous embodiment, and are used to construct a process for forming a corner contour line by projecting two points on the overlapped top contour line and bottom contour line on the main plane perpendicular to the mobile terminal.
S228', referring to fig. 8k together, trimming off the portion of each circle with diameter D, which exceeds the top and bottom of the initial corner profile, to generate a plurality of circular arc lines formed between the top and bottom contour lines of the initial corner profile;
and S229', fitting a plurality of segments of circular arc lines formed between the top contour line and the bottom contour line of the initial corner contour into the corner outline contour in a curve grid mode.
Fig. 7 shows a specific implementation manner of step S23:
s231, drawing a center line parallel to the vertical line through the center of the circle with the diameter D;
and S231, when the circle with the diameter D intersects with both the top and the bottom of the initial corner outline, the point, which is located on the corner outline and is intersected with the circle with the diameter D, of the center line is the middle point, and the connecting line of the plurality of middle points on the corner outline is the center line of the corner outline.
Compared with the prior art, the intersection line of the plane perpendicular to the corner outline where the connecting line of the points of the corresponding positions of the top line and the bottom line of the corner outline of the metal middle frame is located and the corner outline is an arc line with the diameter of D, the maximum boundary line of the outline of the metal middle frame 100 is formed by symmetrically mirroring the extracted center line of the corner outline to the long side 12 and the short side 13 of the metal middle frame, the cutter is programmed according to the maximum outline boundary line of the processing track line and processes the metal middle frame accordingly, the diameter of the circular arc processing edge of the cutter is equal to the diameter of the contour line of each corner outline perpendicular to the main plane A of the mobile terminal, therefore, the cutter does not need to be switched in the processing process of the metal middle frame, and the processing surface at the connecting position of the corner outline and the long side or the short side is smooth and free of seams.
The application also discloses the metal middle frame, which is manufactured by adopting the method for processing the shape curved surface of the metal middle frame.
The application also protects a mobile terminal which comprises the metal middle frame, wherein the metal middle frame is manufactured by the method for processing the shape curved surface of the metal middle frame.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A method for processing the shape curved surface of a metal middle frame is realized based on a cutter with an inward-concave arc processing knife edge, the cutter is a rotating body formed by a rotating surface rotating around a rotating shaft, the diameter of the arc processing knife edge is D, the metal middle frame is used in a mobile terminal, and the method for processing the shape curved surface of the metal middle frame is characterized by comprising the following steps:
fitting a corner outline of the metal middle frame, wherein a connecting line of two points at corresponding positions on a top line and a bottom line of the corner outline is vertical to a main plane of the mobile terminal, and an intersecting line of a plane vertical to the corner outline and a corner outline, where the connecting line of the points at the corresponding positions of the top line and the bottom line is vertical to the corner outline, is an arc line with the diameter of D;
extracting a central line of the corner outline, wherein each point on the central line is a midpoint of a corresponding intersection line of a plane perpendicular to the corner outline and the corner outline;
the central line of the outline of the corner is symmetrically mirrored to the long side and the short side of the metal middle frame to form the maximum boundary line of the outline of the metal middle frame,
programming the maximum boundary line of the outline of the metal middle frame as a path line for machining a cutter;
and (3) processing the metal middle frame by using the cutter according to the programmed trajectory, before processing, ensuring that the rotating shaft of the cutter is vertical to the main plane of the mobile terminal, and the arc midpoint of the longitudinal section of the arc processing knife edge of the cutter is superposed with the trajectory processed by the cutter.
2. The method for processing the contour curved surface according to claim 1, wherein the top line and the bottom line of the corner contour of the metal middle frame are in accordance with the requirements of the metal middle frame of the mobile terminal.
3. The method of claim 2, wherein the machining is performed by a machining tool,
the step of fitting the outline of the metal middle frame comprises the following steps: an initial corner profile at a corner location of a product drawing of a metal middle box is extracted.
4. The method of claim 3, wherein the machining is performed by a machining tool,
the step of fitting the outline of the metal middle frame comprises the following steps: and fitting the corner outline of the metal middle frame according to the initial corner outline.
5. The method of claim 4, wherein the step of fitting the corner profile of the metal center frame comprises:
dividing the initial corner contour into a plurality of sections, wherein the dividing direction is vertical to the main plane direction of the mobile terminal,
searching a vertical plane of each section, wherein the vertical plane is vertical to a connecting line of two end points of the projection of the section in the main plane direction of the mobile terminal and is vertical to the main plane of the mobile terminal;
drawing a circle with the diameter D on each vertical plane;
translating the circle of diameter D in a vertical plane to intersect both the top and bottom of the initial corner profile;
trimming off the part of each circle with the diameter D, which exceeds the top and the bottom of the initial corner profile, and generating a plurality of sections of circular arc lines formed between the top contour line and the bottom contour line of the initial corner profile;
and fitting a plurality of sections of circular arc lines formed between the top contour line and the bottom contour line of the initial corner contour into the corner outline by means of curve grids.
6. The method of claim 5, wherein the machining is performed by a machining tool,
the step of dividing the initial corner profile into segments comprises: extracting a top contour line of the corner outline; equally dividing the top contour line to obtain a plurality of divided line segments;
the step of finding the vertical plane of each segment comprises: connecting two ends of each segment, finding out a vertical line of each connecting line, and stretching each vertical line along a direction vertical to the main plane of the mobile terminal into a sheet body to form a vertical plane of each segment of corner outline.
7. The method of profiling according to claim 6 wherein said step of translating said circle of diameter D in a vertical plane to intersect both the top and bottom of said initial corner profile comprises:
extracting a bottom contour line of the corner outline and a plurality of vertical lines correspondingly projected on a plane where the bottom contour line is located when a plurality of vertical lines are formed;
connecting points corresponding to the top contour line and the bottom contour line by using a connecting line;
moving the center of a circle with the diameter D on each vertical plane to the midpoint of the connecting line;
translating the circle of diameter D in a direction parallel to a major plane of the mobile terminal to intersect both the top and the bottom of the initial corner profile.
8. The method of claim 7, wherein the step of extracting the centerline of the corner profile comprises:
drawing a center line parallel to the vertical line through the center of the circle with the diameter D;
when the circle with the diameter D intersects with the top and the bottom of the initial corner outline, the point, which is located on the corner outline and is intersected with the circle with the diameter D, of the center line is the midpoint, and the connecting line of the midpoints on the corner outline is the center line of the corner outline.
9. The metal middle frame is characterized by being manufactured by the method for processing the contour curved surface of the metal middle frame according to any one of claims 1 to 8.
10. A mobile terminal, characterized in that the mobile terminal comprises a metal middle frame, and the metal middle frame is manufactured by the method for processing the contour curved surface of the metal middle frame according to any one of claims 1 to 8.
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| CN202011174952.7A CN112327748B (en) | 2020-10-28 | 2020-10-28 | Mobile terminal, metal middle frame and contour curved surface processing method thereof |
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| CN202011174952.7A CN112327748B (en) | 2020-10-28 | 2020-10-28 | Mobile terminal, metal middle frame and contour curved surface processing method thereof |
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| JP2005066954A (en) * | 2003-08-21 | 2005-03-17 | Monolith:Kk | Decorative member with decorative sheet stretched over it and its manufacturing method |
| CN106312162A (en) * | 2016-10-27 | 2017-01-11 | 维沃移动通信有限公司 | Milling cutter and forming method of outer side of mobile terminal rear cover |
| CN107790795B (en) * | 2017-11-06 | 2020-04-21 | 东莞长盈精密技术有限公司 | Cutter and method for processing gradual change curved surface |
| CN108319221B (en) * | 2018-01-24 | 2020-04-21 | 东莞长盈精密技术有限公司 | Tool path calculation method and middle frame processing method |
| CN110661906A (en) * | 2018-06-28 | 2020-01-07 | 华为技术有限公司 | Curved cover plate, processing method of curved cover plate and terminal |
| CN109590525B (en) * | 2018-12-06 | 2020-10-23 | 东莞捷荣技术股份有限公司 | Special composite end mill for mobile phone middle frame and mobile phone middle frame milling method |
| CN110434376B (en) * | 2019-08-06 | 2021-02-02 | 东莞长盈精密技术有限公司 | Middle frame processing method |
| CN210630034U (en) * | 2019-08-30 | 2020-05-26 | 联想(北京)有限公司 | Electronic device and processing tool |
| CN110618653B (en) * | 2019-09-12 | 2020-11-24 | 上海拓璞数控科技股份有限公司 | Method and device for automatically generating aircraft skin mirror image milling tool path track |
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