KR101663997B1

KR101663997B1 - Curved surface machining method of smartphone side key

Info

Publication number: KR101663997B1
Application number: KR1020160057683A
Authority: KR
Inventors: 이정숙
Original assignee: 대양이엔지 주식회사; 이정숙
Priority date: 2016-05-11
Filing date: 2016-05-11
Publication date: 2016-10-11
Also published as: WO2017195942A1

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a side key for a smart phone or a method for processing a curved surface of an external part, and more particularly to a side key for a smart phone or a curved surface To a method for machining a curved surface of a workpiece.
A method of curving a smartphone side key of a smartphone side key according to an embodiment of the present invention includes the steps of: (A) forming a plurality of side keys or an external part basic frame
(B) In a state where a diamond tip having a desired curved surface shape of a side key or an external part of a smart phone is interposed on one side of the side key or an external component basic frame, a spindle of the CNC machine equipped with a diamond tip is moved to the other side, And machining the curved surface in such a manner as to push out the surface of the side key or the external component basic frame.

Description

{Curved surface machining method of smartphone side key}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a side key for a smart phone or a method for processing a curved surface of an external part, and more particularly to a side key for a smart phone or a curved surface To a method for machining a curved surface of a workpiece.

2. Description of the Related Art Generally, a smart phone is composed of a main body composed of a top cover, a bottom cover, a printed circuit board mounted between the top cover and the bottom cover and various components mounted thereon, and a display unit provided on the front surface of the main body.

In addition, various function keys such as an up / down key for adjusting a volume during a call are installed as side keys on one side of the main body.

One side of the flexible circuit board is fixed to the printed circuit board by soldering or a connector. A side key is attached to the flexible circuit board and electrically connected to a circuit pattern formed on the printed circuit board.

In this regard, when the display unit or the side key is touched with a finger or the like, the touch feeling of the user's finger when pressed or the grip feeling when gripped by the hand becomes very important for sensing the use performance of the mobile device.

Accordingly, in recent years, attempts have been made to form the surface, the main body, the side key, and the external parts of the display portion of the mobile device into a curved surface.

In this case, the angles of the curved surfaces are not uniform but are formed at various angles.

Among them, the curved surface of the conventional side key is formed by a ball end mill.

The ball end mill has a tip portion formed in a substantially spherical shape such as a ball and a tip portion formed in a tip of the ball end mill as a pointed portion.

As shown in the flow chart of Fig. 1, the curved surface machining of the side key by the conventional ball end mill is performed by placing the wave work block on the jig in a non-moving state (S10), and by using a CNC machine, After forming the basic shape of the ball end mill (S12), the ball end mill is brought into contact with the basic shape of the workpiece using the spindle equipped with the ball end mill, and the ball end mill is rotated with the spindle, So that the workpiece is cut (S14).

At this time, the workpiece is processed by moving the spindle forward and backward while moving the spindle at a distance of about 0.03 mm in the left and right (width direction).

Therefore, in the conventional method of curving the side key, the machining is performed by moving the spindle several tens of times for machining a curved surface of one side key, so that the machining takes a long time and the workability is poor. Therefore, in order to process a large number of side keys, And a worker who handles the CNC machine.

In addition, if cutting is performed while moving the conventional spindle dozens of times, a burr is formed on the machined surface and the quality of the rough surface is poor. Therefore, the machined surface is processed in a post- There is a problem that a post-process (S16) of smoothly polishing the wafer is required.

Registration No. 10-0619961 (Date of Publication: September 08, 2006) Registration No. 10-0768902 (Announcement date October 22, 2007) Publication No. 10-2004-0010467 (Published on Jan. 31, 2004)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a diamond tip that forms a desired curved surface shape of a smart phone or an external part by machining a curved surface of a side key or an external part in a planar manner, The object of the present invention is to provide a side key of a smart phone or a method of processing an external part curved surface in which a time required for curving a key or an external part can be greatly reduced to several tens of minutes and a processing surface is smooth and a post process such as polishing is unnecessary.

According to an aspect of the present invention, there is provided a method of processing a side key of a smart phone or a curved surface of an external part using a CNC processor,

(A) forming a plurality of smartphone side keys or external component basic frames on a work block in length and width;

(B) In a state where a diamond tip having a desired curved surface shape of a side key or an external part of a smart phone is interposed on one side of the side key or an external component basic frame, a spindle of the CNC machine equipped with a diamond tip is moved to the other side, Machining the curved surface in such a manner as to push out the surface of the side key or the external component basic frame;

And a control unit.

Further, in the step (B), the spindle is processed by reciprocating the spindle two to three times according to the cut thickness of the side key or the external component basic frame.

Further, in the step (B), the compressed air is injected to the machining site of the side key or the external component basic frame at the same time.

Further, in the step (B), the diamond tip is machined at an oblique angle to the left or right.

Further, the diamond tip is inclined left or right by a curved surface machining module, and a curved surface machining module is mounted on a spindle of a CNC machine in a state where the cutting tool equipped with the diamond tip is coupled to the curved machining module,

The curved surface machining module includes a fixture for fixing the curved surface machining module to the front surface of the spindle,

A first reference plate coupled to the front surface of the fixture and having a first angle scale on the left and right of the upper center and having a plurality of first female thread grooves formed in the same radius at the center of the circle,

The first through hole passing through the front and the rear is disposed at a position corresponding to the first female screw groove along a circumference having the same radius from the center of the same circle to a predetermined length And the first adjusting screw has a first adjusting hole passing through the first through hole and screwed into the first female screw groove of the first reference plate.

A second angle scale is formed on the front center of the upper portion of the first adjuster so as to protrude vertically forward from one side of the first adjuster. The plate,

A second through hole passing through the right and left sides is formed at a position corresponding to the second female screw groove along a circumference having the same radius at the center of the same circle to form a predetermined length And the second adjusting screw is passed through the second through hole and screwed into the second female screw groove of the second reference plate,

And the diamond tip is inclined forward or backward.

And the bite is projected to the lower portion of the coupling hole, and a diamond tip is attached to a lower portion of the bite.

According to the means for solving the above-mentioned problems, the curved surface of the side key or the external part is machined by a planar method in which the workpiece is pushed out with a diamond tip having a desired curved surface shape of a side key or an external part of a smart phone, The time required for machining can be greatly reduced to several tens of minutes, and the machined surface is smooth, so that a post-process such as polishing is unnecessary, and productivity can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart showing a conventional side key machining method. FIG.
2 is a flowchart showing a method of processing a curved surface of a side key according to an embodiment of the present invention.
3A to 3C are a plan view, a front view and a side view of a curved surface processing module applied to an embodiment of the present invention.
4 is a photograph of a product of a curved surface processing module applied to an embodiment of the present invention.
5 is a conceptual diagram illustrating a method of processing a curved surface of a side key according to an embodiment of the present invention.
6 is a conceptual diagram showing a method of processing a curved surface of a side key according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

It is to be noted that the same components of the drawings are denoted by the same reference numerals and symbols as possible even if they are shown in different drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Also, when a part is referred to as "including " an element, it does not exclude other elements unless specifically stated otherwise.

2 is a flowchart showing a method of processing a curved surface of a side key according to an embodiment of the present invention.

Hereinafter, side keys and external components will be mainly described.

First, in the workpiece preparation step S20, a plate having a predetermined thickness is formed on the jig, and a soft workpiece block such as aluminum is placed on the jig without moving.

Next, a CNC processing machine is used to form a plate-shaped workpiece block having a predetermined depth and width, for example, a rectangular groove, and a shape such as a side key, for example, a rectangular shape, A plurality of workpieces are formed on the work block in the vertical and horizontal directions (S22).

The left side view of FIG. 5 shows that a side key base frame (shape) in a rectangular shape is formed in the work block 300.

Next, the spindle of the CNC machine is moved and positioned on the upper portion of the work block 300 while the work block 300 is still fixed.

At this time, a diamond tip 210 having a desired curved shape of the side key is attached to the bottom of the cutting tool 200 (see FIG. 5), and the cutting tool is attached to the spindle of the CNC machining tool Respectively.

When the spindle is lowered and the spindle is moved to the other side in a state where the diamond tip 210 is interposed on one side of the side key base frame of the work block 300, the diamond tip 210 pushes the surface of the side key base frame The curved surface is processed in the same manner as the planer (S24).

At this time, if the thickness to be cut is thick, the spindle is processed while reciprocating about 2 to 3 times.

It is preferable to remove the scraped residue (debris) by spraying the compressed air at the processing part of the basic frame in such a processing step.

The right side of FIG. 5 shows a side key 310 in which a workpiece block 300 is curved by a diamond tip 210.

5, when the curved surface of the side key 310 is symmetrical, the diamond tip 210 can be vertically processed. However, when the curved surface of the side key 210 is asymmetric to the left or right, The tip 210 must be machined to a left or right inclined state.

To this end, the surface machining module mounted on the spindle must be provided with means for adjusting the angle.

Next, the groove around the side key 310 having the curved surface formed by the CNC processing machine is further processed to further deepen the groove depth and widen the width.

Although the curved surface machining of the side key has been described above, the curved surface can be machined by the above-described method for a smart phone outer part made of soft material such as aluminum.

3A to 3C are a plan view, a front view and a side view of a curved surface processing module applied to an embodiment of the present invention.

3A to 3C, the curved surface machining module 100 includes a fixture 160, first and second reference plates 110 and 130, first and second control holes 120 and 140, and a coupling hole 150 .

The fixture 160 fixes the curved machining module 100 on the front surface of the spindle.

The first reference plate 110 is coupled to the front surface of the fixture 160. An angle scale 112 is displayed at the center of the upper portion and a plurality of female thread grooves do.

In this embodiment, three female thread grooves are formed horizontally right and left and vertically above the center of the same circle.

The first control member 120 is coupled to the front surface of the first reference plate 110 so as to adjust the angle to the left and right. For this purpose, a through hole 112 passing through the front and rear is formed at a position corresponding to the female screw groove And the adjusting screw 124 is passed through the through hole 122 of the first adjusting member 120 and is screwed into the female screw groove of the first reference plate 110, .

In the figure, three adjustment screws 124 are shown to be connected to three through holes 122, and three adjustment screws are located at the same distance from the center of the same circle.

The adjusting screw 124 rotates the first adjusting member 120 to the left or right while partially rotating the adjusting screw 124 while the adjusting screw 124 guides the through hole 122 to adjust the rotational angle to the center of the same circle, The first adjusting member 120 is coupled to the first reference plate 110 at an adjusted angle.

The second reference plate 130 is coupled to the front surface of one side of the first adjuster 120 so as to protrude vertically forward. An angular scale 132 is displayed at the upper center of the upper reference plate 130, A plurality of shown female threaded grooves are formed.

In the figure, three female thread grooves are formed at the center of the same circle in the horizontal and vertical directions.

The second control member 140 is coupled to the side surface of the second reference plate 130 so as to be adjustable in the forward and backward directions. For this purpose, a through hole 142 passing through the left and right sides is provided at the position corresponding to the female screw groove And the adjusting screw 144 passes through the through hole 142 of the second adjusting member 140 and is screwed into the female screw groove of the second reference plate 130 do.

In the figure, three adjustment screws 144 are shown to be connected to three through holes 142, and three adjustment screws 144 are located at the same distance from the center of the same circle.

Accordingly, the adjusting screw 144 rotates forward or backward while partially rotating the adjusting screw 144, and the adjusting screw 144 guides the through hole 142 to adjust the rotational angle to the center of the same circle In this state, when the adjusting screw 144 is tightened again, the second adjusting member 140 is coupled to the second reference plate 130 at the adjusted angle.

The coupling member 150 is coupled to the side surface of the second adjusting member 140 while the bite 200 is fixed.

The bite 200 is coupled to the lower portion of the coupling 150 so as to protrude therefrom, and a diamond tip 210 is attached to the lower portion of the bite 200.

The lower portion of the diamond tip 210 has a desired curved shape of the side key 210.

FIG. 4 is a photograph of a curved surface processing module applied to an embodiment of the present invention. A first reference plate 110 having an angle scale 112 is coupled to a front surface of a fixture 160, Is coupled to the front surface of the first reference plate 110 by a through hole 122 and an adjusting screw 124 so that the angle of rotation can be adjusted.

A second reference plate 130 with an angle scale 132 protruding forward is coupled to the left of the first adjuster 120 and a second reference plate 130 coupled to the second adjuster 140 and a coupling 150 ) Are connected in order.

6 is a conceptual diagram showing a method of processing a curved surface of a side key according to another embodiment of the present invention.

6, when the desired curved surface angle of the side key is not uniform and the curved surface is formed at various angles, a curved surface is formed at the diamond tip 210 at various angles, The side key 310 having a curved surface of multiple angles can be processed in the same manner as a planer that carves out the surface.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

In addition, it is a matter of course that various modifications and variations are possible without departing from the scope of the technical idea of the present invention by anyone having ordinary skill in the art.

100: Surface processing module 110, 130: Reference plate
120, 140: regulator 150:
160: fixture 200:
210: Diamond tip 300: Workpiece block
310: side key

Claims

A method of processing a curved surface of a side key or an external part of a smart phone using a CNC machine,
(A) forming a plurality of side keys or a plurality of external component basic frames on the work block in the vertical and horizontal directions;
(B) In a state where a diamond tip having a desired curved surface shape of a side key or an external part of a smart phone is interposed on one side of the side key or an external component basic frame, a spindle of the CNC machine equipped with a diamond tip is moved to the other side, Machining the curved surface in such a manner as to push out the surface of the side key or the external component basic frame; Lt; / RTI >
In the step (B), the diamond tip is processed at an oblique angle to the left or right,
Wherein the diamond tip is inclined left or right by a curved surface machining module and a curved surface machining module is mounted on the spindle of the CNC machine with the cutting tool having the diamond tip fixed thereto,
The curved surface machining module includes a fixture for fixing the curved surface machining module to the front surface of the spindle,
A first reference plate coupled to the front surface of the fixture and having a first angle scale on the left and right of the upper center and having a plurality of first female thread grooves formed in the same radius at the center of the circle,
The first through hole passing through the front and the rear is disposed at a position corresponding to the first female screw groove along a circumference having the same radius from the center of the same circle to a predetermined length Wherein the first adjusting screw has a first adjusting hole passing through the first through hole and screwed into the first female screw groove of the first reference plate.

The method according to claim 1,
Wherein in the step (B), the spindle is processed while reciprocating the spindle two to three times in accordance with the cut thickness of the side key or the external component basic frame.

The method according to claim 1,
Wherein the compressed air is sprayed to the machining area of the side key or the external component basic frame in the step (B).

delete

The method according to claim 1,
A second reference plate having a second angular graduation in front and rear at an upper center thereof and having a plurality of second female thread grooves formed at the same radius at the center of the same circle, ,
A second through hole passing through the right and left sides is formed at a position corresponding to the second female screw groove along a circumference having the same radius at the center of the same circle to form a predetermined length And the second adjusting screw is passed through the second through hole and screwed into the second female screw groove of the second reference plate,
Wherein the diamond tip is tilted forward or backward.

The method according to claim 6,
Wherein the bite is coupled to the lower portion of the coupling hole so as to protrude therefrom, and a diamond tip is attached to the lower portion of the bite.