JP4175867B2 - End face processing method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an end face processing method and apparatus for grinding or cutting an end face of a laminated polarizing film.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a polarizing film used for a liquid crystal panel or the like has an optical axis like a crystal, so that a crack is frequently generated on a cut surface after being cut into a predetermined shape (rectangular shape). . In order to remove this crack, the four circumferential end surfaces of the cut surface are ground. Specifically, a means is used in which a planar portion of a plurality of stacked polarizing film groups is sandwiched between a pair of upper and lower holding portions, and the opposite end surfaces of the polarizing film groups are ground simultaneously while being sandwiched between a pair of grinders.
[0003]
[Problems to be solved by the invention]
However, in the conventional means, since the laminated polarizing film group is sandwiched and held only from above and below, the polarizing film is horizontally oriented (direction along the film surface) by the stress generated when the end face is ground by the grinder. The deviation is caused and grinding unevenness occurs.
[0004]
The present invention has been made in view of such circumstances, and can perform grinding or cutting with a good finish free from grinding or cutting unevenness due to deviation in the direction along the film surface of the polarizing film. The main object is to provide an end face machining method and an apparatus therefor.
[0005]
[Means for Solving the Problems]
The present invention has the following configuration in order to achieve the above object.
[0006]
That is, the present invention according to claim 1 is an end face processing method for grinding or cutting an end face of a laminated polarizing film,
While holding both planar portions of a workpiece formed by laminating a plurality of polarizing films and end surfaces orthogonal to each other, an end surface opposite to the held end surface is ground or cut .
[0007]
(Operation / Effect) A work formed by laminating a plurality of polarizing films is not only sandwiched and held by both plane portions, but also end faces orthogonal to each other are held. Therefore, the polarizing film does not move in the direction along the film surface due to stress generated during grinding or cutting of the end surface facing the holding end surface. Therefore, it is possible to perform end surface processing with good finish without grinding or cutting unevenness.
[0008]
The invention according to claim 2 is characterized in that, in the end face processing method according to claim 1, two end faces orthogonal to each other facing the held end face are ground or cut substantially simultaneously.
(Operation / Effect) It is effective to increase the efficiency of the grinding or cutting processing of the end faces by grinding or cutting the two end faces almost simultaneously.
[0010]
The invention according to claim 3 is an end face processing apparatus for grinding or cutting an end face of the laminated polarizing film,
A pair of end surface holding means for holding the end surfaces orthogonal to each other of the workpiece formed by laminating a plurality of polarizing films;
A pair of plane holding means for holding and holding the plane portion of the workpiece;
Is characterized in that a means scraping the end faces of grinding or cutting the end face opposite the end face which is held by the end surface holding means.
[0011]
(Function / Effect) A work formed by laminating a plurality of polarizing films is not only sandwiched and held by a pair of plane holding means on both plane portions, but is also received by a pair of end face holding means at end surfaces orthogonal to each other. Retained. Therefore, the polarizing film does not move in the direction along the film surface due to stress generated during grinding or cutting of the end surface facing the holding end surface. Therefore, the end face processing method according to claim 1 can be suitably realized.
[0012]
According to a fourth aspect of the present invention, in the end face processing apparatus according to the third aspect, the end face cutting means is configured to grind or cut two end faces orthogonal to each other substantially simultaneously. is there.
[0013]
(Function / Effect) Two end faces that are orthogonal to each other can be ground or cut almost simultaneously in one grinding or cutting process, and then the remaining end faces that are orthogonal to each other by changing the position of the workpiece 180 °. it is possible to grind or cutting process, the results, can be performed grinding or cutting a good end face efficiency.
[0014]
The invention according to claim 5 is characterized in that, in the end face machining apparatus according to claim 3 or claim 4, a corner cutting means for grinding or cutting the corner of the workpiece is provided. .
[0015]
(Operation / Effect) By providing the corner cutting means, the grinding or cutting burr generated at the corner of the workpiece can be ground or removed after the end face is ground or cut . That is, the work efficiency can be improved as compared with the case where corner processing is performed in a later process.
[0016]
According to a sixth aspect of the present invention, in the end face machining apparatus according to any one of the third to fifth aspects, the flat surface holding means is simultaneously swung by the connected driving means to sandwich and hold the workpiece. It is characterized by being configured to rotate.
[0017]
(Operation / Effect) By turning the pair of plane holding means at the same time, it is possible to rotate the pinched workpiece without squeezing it, and to change the posture with respect to the shaving means as a result. Or it becomes effective in performing cutting .
[0018]
The invention according to claim 7 is the end face machining apparatus according to any one of claims 3 to 6, wherein the shaving means is an end mill.
[0019]
(Operation and effect) By continuously aligning the end mill's peripheral surface with the end face of the workpiece, the end mill and the end face are brought into linear contact with each other, and the end mill is moved in parallel with the end face of the workpiece, thereby continuously cutting the entire end face. can do. Further, by using an end mill, it is possible to prevent the occurrence of stress in the direction along the end face of the workpiece, and it is possible to perform end face cutting with excellent finish.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
[0021]
FIG. 1 is a side view showing an outline of a processing procedure according to the end face processing method of the present invention, and FIG. 2 is a front view showing an outline of the processing procedure.
The details will be described in the order of each process.
[0022]
(1) First, as shown in FIG. 1 (a) and FIG. 2 (a), a work 1 formed by laminating (polarizing film group) a plurality of polarizing films cut and cut into a rectangular shape is orthogonal to each other. It is supplied and loaded between a pair of end surface holders 2 arranged in an obliquely upward posture and a plane holder 3 arranged opposite to each other. Two end surfaces S ₃ and S ₄ orthogonal to each other in the work 1 are received and held by the end surface holder 2. Here, both end surface holders 2 are supported by an air cylinder 5 attached to the base 4 so as to be able to advance and retreat, and the plane holder 3 is configured to be horizontally movable by an air cylinder 6 attached to the base 4. Has been. The end surface holder 2 corresponds to the end surface holding means of the present invention, and the flat surface holder 3 corresponds to the flat surface holding means.
[0023]
(2) As shown in FIG. 1 (b) and FIG. 2 (b), the plane holder 3 moves forward, and the left and right plane portions of the workpiece W are sandwiched and held between the two plane holders 3. 1 is fixedly held in a predetermined posture.
[0024]
(3) As shown in FIG. 1 (c) and FIG. 2 (c), the peripheral surface of the two end mill 7 is an example of an end face cutting Ri means which has been waiting, both end faces of the workpiece 1 in the upward posture Contact is made parallel to S ₁ and S ₂ .
[0025]
Specifically, as shown by a two-dot chain line in FIG. 2 (c), two end mills 7 arranged at a standby position at a predetermined interval in the moving direction are parallel to the right side in the figure while being driven to rotate at high speed. Move sideways. In this moving process, each end mill 7 contacts the _two end faces S ₁ and S ₂ of the workpiece 1 in order, and each end face is cut.
[0026]
(4) As shown in FIG. 1 (d) and FIG. 2 (d), 2 pieces of the end mill 8 is an example of a corner-cutting Ri means which has been waiting, the two corners of the work 1 e _1, e ₄ is moved in parallel while contacting ₄ .
[0027]
Specifically, as shown by a two-dot chain line in FIG. 2D, the two end mills 8 arranged at the standby position at a predetermined interval in the moving direction are parallel to the right side in the drawing while being driven to rotate at high speed. Move sideways. In this moving process, each end mill 8 comes into contact with the two corners e ₁ and e ₄ at the diagonal positions in the workpiece 1 and the cutting burr generated at each corner is removed by cutting .
[0028]
The arrangement relationship of the end mills 8 is not limited to this form, and the two end mills 8 may be arranged so as to face each other in the end face width direction of the workpiece 1.
[0029]
(5) As shown in FIG. 1 (e) and FIG. 2 (e), after only the end face holder 2 is retracted, the two plane holders 3 hold the work 1 therebetween and hold the center axis P thereof. The work 1 is turned and rotated by 180 ° around it. Thereafter, the both end surface holders 2 advance to the original workpiece holding position, and the workpiece end surfaces S ₁ and S ₂ that have been cut are received and held by the end surface holder 2.
[0030]
(6) The steps (3) and (4) are performed, and the cutting of all the end faces S _{1 to} S ₄ and all the corners e _{1 to} e ₄ of the workpiece ₁ is completed.
[0031]
(7) When all the cutting steps are completed, as shown in FIGS. 1 (f) and 2 (f), the two plane holders 3 are moved backward, and the workpiece 1 ′ after cutting is taken out.
[0032]
Thus, one cutting process is completed, and thereafter the above process is repeated every time a new workpiece 1 is loaded and loaded.
[0033]
As described above, with respect to the workpiece 1 held by the pair of end surface holders 2 arranged in an obliquely upward posture orthogonal to each other and the plane holder 3 arranged opposite to each other, the opposite end surfaces are held opposite to each other. By cutting the orthogonal surfaces with the end mill 7, it is possible to prevent the polarizing film from moving in the direction along the film surface due to the stress generated during the end surface cutting . I Shiga, it is possible to cut a good finish without cutting uneven.
[0034]
Further, by providing the end mill 8 as corner cutting means, can be carried out simultaneously in the end face cutting process cutting back generated in the corner portion of the workpiece 1 after the end face cutting process. Therefore, it is not necessary to provide a separate process for cutting the corners, so that work efficiency can be improved.
[0035]
Furthermore, the linear cutting using peripheral surface of the end mill is moved in parallel, since the cutting of the end face and the corner portion of the workpiece 1, it is possible to prevent the occurrence of direction of the stress along the end face of the workpiece 1 As a result, end face cutting with excellent finish is possible.
[0036]
Next, an embodiment of an end face processing apparatus for executing the end face cutting method will be described with reference to FIGS. 3 and 4.
[0037]
As shown in FIGS. 3 and 4, a base 11 is connected and fixed to the lower part of the main frame 10 of the frame structure in the end face processing apparatus so as to be adjustable in the front-rear direction, and the base 4 provided on the upper surface of the base 11 In addition, the end surface holder 2 is mounted by an air cylinder 5 so as to be able to advance and retract diagonally. Further, as shown in FIG. 4, a pair of left and right plane holders 3 are rotatably mounted around the axis P on bearing portions 12 and 13 erected on the left and right sides of the base 11.
[0038]
Here, the support shaft 14 connected to one (left side in FIG. 3) of the plane holder 3 is inserted and supported by the bearing portion 12 so as to be rotatable only, and the other (right side in FIG. 3) of the plane holder 3 is supported. The connected support shaft 15 is inserted into and supported by the bearing portion 13 so as to be rotatable and slidable back and forth in the direction of the rotation axis. The movable bearing portion 16 that supports the end portion of the support shaft 15 is configured to be horizontally movable by an air cylinder 17 attached to the lower surface of the base 11. The support shaft 15 is moved by the expansion and contraction operation of the air cylinder 17. By moving to the left and right, the opposing two plane holders 3 are relatively approached and separated from each other, and the workpiece 1 is sandwiched and released.
[0039]
The movable bearing portion 16 is equipped with a motor 18 with a reduction gear, and the motor 18 and the support shaft 15 are wound and interlocked via a belt 19 having no slip such as a toothed belt.
[0040]
A telescopic transmission shaft 20 is horizontally disposed below the base 11, and one end side 20 a of the transmission shaft 20 is supported by the movable bearing portion 16 and is linked to a motor 18 via a belt 19. Yes. Then, the other end side 20 b of the transmission shaft 20 and the support shaft 14 of the plane holder 3 fixedly arranged are wound and interlocked via a belt 21. Therefore, when the motor 18 is rotated, the two plane holders 3 are simultaneously rotated synchronously in the same direction.
[0041]
At the upper part of the main frame 10, a pair of front and rear movable bases 23 that are horizontally moved through a horizontal feed mechanism 22 using a ball screw are provided, and end mills 7 for end face cutting that are driven to rotate at high speed by a motor 24 are provided. The movable base 23 is mounted.
[0042]
That is, both end mills 7 are horizontally moved left and right on the two orthogonal end surfaces of the workpiece 1 held and supported from below by the front and rear end surface holders 2 and sandwiched and held from the left and right by the left and right flat surface holders 3. It is comprised so that it may cut by the surrounding surface.
[0043]
In the illustrated end face cutting device, the end mill 8 that cuts the corners e1 to e4 of the workpiece 1 is not provided, but the end face cutting apparatus can be equipped so as to be movable left and right with the same configuration as the end mill for end face cutting .
[0044]
The present invention can also be implemented in the following forms.
[0045]
(1) In the above embodiment, two end faces that are orthogonal to each other are cut at the same time in one cutting process, but the posture is changed by rotating the work 1 by a predetermined angle to cut the end faces one by one. It is also possible to implement in the form.
[0046]
(2) It is also possible to change the angle and working position of the end mill 7 for end face cutting so that it can also be used as the end mill 8 for corner cutting .
[0047]
(3) It is also possible to use a grinder for the end face cutting means.
[0048]
(4) In the above embodiment, the end surface of the workpiece 1 is held and processed by the end surface holder 2 and the plane holder 3 so that the end surface of the workpiece 1 is inclined upward. It is also possible to perform the machining in a vertical posture so that the end surface is held from the direction and the end surface is held by the end surface holder 2 from the lateral direction.
[0049]
(5) In the above embodiment, two corners are cut after each end face is cut , but three corners may be cut simultaneously. For example, after cutting the end faces S ₁ , S ₂ , the corners e ₁ , e ₂ , e ₄ are cut , and then the work 1 is rotated around its central axis P by 180 ° to make the end faces S ₃ , S ₄ After cutting , corners e ₁ , e ₂ , e ₃ may be cut .
[0050]
【The invention's effect】
As is apparent from the above description, according to the present invention, not only is the sandwiched and held between the two plane portions of the workpiece formed by laminating a plurality of polarizing films, but also held at the end faces orthogonal to each other, the end faces The polarizing film does not move in the direction along the film surface due to the stress generated during the cutting process. As a result, it is possible to perform end face cutting with good finish without cutting unevenness.
[Brief description of the drawings]
FIGS. 1A to 1F are side views schematically showing an end face cutting process.
FIGS. 2A to 2F are front views showing an outline of an end face cutting process. FIGS.
FIG. 3 is a side view of the end face cutting device.
FIG. 4 is a front view of the end face cutting device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Workpiece | work 2 ... End surface holder 3 ... Flat surface holder 7 ... End mill (end surface cutting means)
8 ... End mill (corner cutting means)

Claims (7)

An end face processing method for grinding or cutting an end face of a laminated polarizing film,
An end face processing method characterized by grinding or cutting an end face opposite to the held end face while holding both plane portions of a workpiece formed by laminating a plurality of polarizing films and end faces orthogonal to each other. In the end face processing method according to claim 1,
An end face machining method, wherein two end faces orthogonal to each other facing the held end face are ground or cut substantially simultaneously. An end face processing apparatus for grinding or cutting an end face of a laminated polarizing film,
A pair of end surface holding means for holding the end surfaces orthogonal to each other of the workpiece formed by laminating a plurality of polarizing films;
A pair of plane holding means for holding and holding the plane portion of the workpiece;
An end face machining apparatus comprising: an end face grinding means for grinding or cutting an end face opposed to the end face held by the end face holding means. In the end surface processing apparatus of Claim 3,
An end face machining apparatus, wherein the end face grinding means is configured to grind or cut two end faces orthogonal to each other substantially simultaneously. In the end surface processing apparatus according to claim 3 or 4,
An end face machining apparatus comprising corner cutting means for grinding or cutting a corner of the workpiece. In the end face processing apparatus according to any one of claims 3 to 5,
An end face machining apparatus, wherein the plane holding means is configured to simultaneously rotate by a connected driving means to rotate the workpiece held and held. In the end surface processing apparatus in any one of Claim 3 thru | or 6,
An end face machining apparatus, wherein the shaving means is an end mill.

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