JP6777316B2 - Cutting equipment - Google Patents

Description

The present invention relates to a cutting apparatus for cutting an outer peripheral surface of a laminated body in which a plurality of films made of resin or the like are stacked.

For example, the resin film used for the liquid crystal panel has an optical film made of a polyvinyl alcohol-based resin and a protective film laminated on the surface thereof, and examples of the protective film include triacetyl cellulose and acrylic resin films. used. The optical film made of a laminated film in which a plurality of resin films are laminated in this way is cut into a shape substantially corresponding to the size of the liquid crystal cell having a liquid crystal layer or the like, and is attached to the liquid crystal cell.

Since the outer peripheral surface of the cut optical film is not smooth, the outer peripheral surface of the optical film is finished to be smooth before being attached to the liquid crystal cell. In order to finish the outer peripheral surface, a plurality of optical films are stacked to form a block-shaped laminate, and the outer peripheral surface of the laminate is finished, so that the plurality of optical films can be efficiently processed at one time. Can be finished.

Patent Document 1 describes a cutting apparatus that cuts the end face of a laminated body in which a large number of optical films are laminated. This cutting apparatus has a base that reciprocates in a straight line, a rotary table provided on the base, and a gate-shaped frame provided on the base so as to straddle the table, and the laminated body is a table. It is clamped between the lower pressing member provided on the frame and the upper pressing member provided on the frame so as to be vertically movable by the cylinder. Two cutting members for cutting the end faces of the laminate are arranged on both sides of the base, and after cutting the two end faces of the laminate, the laminate is rotationally driven by 90 degrees by the table to drive the other two. One end face is machined.

Patent Document 2 describes a cutting machine that cuts the outer peripheral surface of a laminated body in which a large number of optical films are stacked as a work. This cutting machine has a swivel table reciprocating on the bed and a U-shaped clamp fixed on the swivel table, and the work is a jig fixed to the lower piece of the clamp. And a jig that can be moved up and down by a cylinder on the upper piece of the clamp. Two cutting tools are provided on the crown to cut and finish the workpiece, and the crown is attached to the two columns.

Japanese Unexamined Patent Publication No. 2014-217941 Japanese Unexamined Patent Publication No. 2008-2600077

As described in Patent Document 1, when the laminate is rotated by the table, the lower pressing member in contact with the lower surface of the laminate is rotationally driven by the table, and the upper pressing member in contact with the upper surface of the laminate is rotated. It is followed and rotated via the laminate. In this way, when the rotational force of the table is transmitted to the rotational force of the upper holding member via the laminated body, the laminated films, which are the optical members constituting the laminated body, are in a stacked and contacted state. The laminated films may shift in the direction of rotation. If the deviation occurs, it becomes impossible to process the end face of the laminated body with high accuracy. In order to prevent the occurrence of deviation, the table must be rotated slowly when changing the machined surface of the laminate, and it cannot rotate at high speed, so there is a problem that cutting efficiency cannot be improved. is there.

On the other hand, as described in Patent Document 2, a cutting process in which a U-shaped clamp composed of a lower piece and an upper piece in the horizontal direction and a middle piece in the vertical direction between them is swiveled by a swivel table. In a machine, when a large clamping force is applied to the work by a cylinder, the tips of the lower and upper pieces are elastically deformed in the direction of expansion, and the laminated film may shift due to the clamping force. It will not be possible to process. Moreover, as the clamp including the cylinder becomes heavier and the inertial force during rotation also increases, the swivel table cannot be rotated at high speed in order to change the machined surface of the workpiece, and the cutting efficiency cannot be improved. There is a problem.

An object of the present invention is to efficiently finish the outer peripheral surface of a laminated body in which a plurality of films are stacked with high accuracy.

The cutting device of the present invention is a cutting device that cuts the outer peripheral surface of a laminate in which a plurality of films are stacked, and is provided on a slide base that is movably arranged horizontally on a bed. The lower swing motor that swivels the side jig, the clamp head that is movably mounted on the main column provided on the slide base in the vertical direction, and the lower jig that is provided on the clamp head. The clamp head is provided on the upper swivel motor that swivels the upper jig that clamps the laminate in synchronization with the lower swivel motor, and the horizontal beam member mounted on the clamp column provided on the slide base. It has a clamp cylinder that pressurizes and applies a clamping force to the laminated body via the clamp head, and a cutting mechanism that is arranged on the bed and cuts the outer peripheral surface of the laminated body.

The cutting device of the present invention is a cutting device that cuts the outer peripheral surface of a laminated body in which a plurality of films are stacked, and is attached to a slide base that is movably arranged horizontally on a bed. A lower swivel motor that swivels a side jig, a rectangular main column that is attached to the slide base and has a hollow inside, a clamp head that is movably mounted on the main column in the vertical direction, and the clamp. There is a gap between the upper swivel motor, which is provided on the head and clamps the laminate by the lower jig, and swivels in synchronization with the lower swivel motor, and the inner surface of the main column. A clamp column provided inside the main column and attached to the slide base, and a horizontal beam member mounted on the clamp column are provided, and the clamp head is pressurized and laminated via the clamp head. It has a clamp cylinder that applies a clamping force to the body, and a cutting mechanism that is arranged on the bed and cuts the outer peripheral surface of the laminated body.

The horizontal beam member provided on the clamp head is provided with a clamp cylinder that applies a clamping force to the laminated body via the clamp head. Even if a clamping force is applied to the laminated body by the clamp cylinder, no clamping force is applied to the main column, and the clamp head does not shift in the horizontal direction. As a result, the outer peripheral surface of the laminated body can be finished with high accuracy.

It is a perspective view which shows the appearance of the cutting machine which is one Embodiment. It is a top view of FIG. It is a front view of FIG. It is a right side view of FIG. It is a perspective view which shows the vertical support base on which the end mill shown in FIG. 1 is mounted, and the column which has moved close to the vertical support base. It is an enlarged front view of a part of a column notch. It is a top view which shows a column and a clamp head which is attached to this column so that it can move up and down. It is sectional drawing which shows the floating joint provided between the piston rod of a clamp cylinder and a clamp head. (A) is a perspective view showing a laminated body formed by stacking a plurality of films, (B) is a perspective view showing an upper end portion of a lower jig, and (C) is a lower jig. It is a perspective view which shows the laminated body loaded in. It is a side view which shows the laminated body sandwiched between the lower jig and the upper jig. It is a block diagram which shows the control part of a cutting machine. (A) to (C) are plan views which show the positioning process by the positioning member with respect to the lower jig. (A) and (B) are plan views which show the process of finishing the two flat surfaces parallel to each other of a laminated body by a cutting disk. (A) and (B) are plan views which show the process of finishing the other two flat surfaces parallel to each other of a laminated body by a cutting disk. (A) to (D) are plan views which show the processing process of cutting the outer peripheral surface of a laminated body by an end mill, and cutting an arc surface and an arm curved surface of the outer peripheral surface of the laminated body. (A) to (E) are plan views showing a processing process of cutting an outer peripheral surface of a laminated body having arc surfaces provided at four corners and concave surfaces partially provided by an end mill.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 4, the cutting apparatus 10 has a bed 11 as an apparatus base, and the bed 11 is provided with two guide rails 12 extending horizontally in the longitudinal direction, that is, the vertical direction thereof. Has been done. A slide base 13 is attached to the guide rail 12, and the slide base 13 is guided by the guide rail 12 and can reciprocate in the horizontal direction as shown by an arrow A in FIG.

A feed screw shaft 14 is arranged between the two guide rails 12 to drive the slide base 13, and the tip of the feed screw shaft 14 is rotatably supported by a bearing 15 attached to the bed 11. The base end is rotatably supported by a bearing 16 attached to the bed 11. A column feed motor 17 is connected to the bearing 16, and the feed screw shaft 14 is rotationally driven by the motor 17. The feed screw shaft 14 is screwed to a nut (not shown) incorporated in the slide base 13, and the rotation of the feed screw shaft 14 causes the slide base 13 to reciprocate linearly as shown by an arrow A.

In the specification, the portion of the bed 11 provided with the column feed motor 17 is the base end portion, and the opposite side is the tip end portion. A column 20 is attached to the base end side of the slide base 13. The column 20 is composed of a main column 21 and a clamp column 22 as shown in FIGS. 1 and 6. The main column 21 has a hollow inside and has a rectangular parallelepiped shape as a whole, and is fixed to the slide base 13 by bolts. The clamp column 22 has a rectangular parallelepiped shape as a whole, is arranged inside the main column 21, and is fixed to the slide base 13 by bolts. The upper end of the clamp column 22 projects upward from the upper surface of the main column 21. The main column 21 and the clamp column 22 are separated from each other and fixed to the slide base 13, and a gap is provided between the inner surface of the main column 21 and the outer surface of the clamp column 22.

As shown in FIGS. 5 to 7, two guide rails 23 extending in the vertical direction are attached to the upper side of the front surface of the main column 21. A clamp head 25 is attached to a slide plate 24 slidably provided on the guide rail 23 in the vertical direction, and the clamp head 25 is guided by the guide rail 23 up and down as shown by an arrow B in FIG. It is movable in the direction. A balance cylinder 26 made of a fluid pressure cylinder such as a pneumatic cylinder is attached to the lower side of the front surface of the main column 21, and the piston rod 26a of the balance cylinder 26 is in contact with the slide plate 24. The balance cylinder 26 supports the clamp head 25 in a floating state. The balance cylinder 26 is connected to a fluid pressure supply source via an electropneumatic regulator (not shown) that converts an electric signal into pressure, and the pressure of the fluid supplied to the balance cylinder 26 is adjusted by the electropneumatic regulator. ..

As shown in FIG. 6, a holder 27 is attached to the tip of the slide base 13, and an index table, that is, a swivel table 28 is rotatably attached to the upper side of the holder 27. In order to drive the swivel table 28 to rotate, the lower swivel motor 29 is attached to the holder 27, and the swivel motor 29 is arranged in the space provided in the slide base 13. On the other hand, the holder 31 is attached to the clamp head 25 so as to face the holder 27, and the swivel table 32 is rotatably attached to the lower side of the holder 31. An upper swivel motor 33 is attached to the holder 31 to rotationally drive the swivel table 32. Both the swivel tables 28 and 32 have coaxial rotation center axes, respectively, and are rotationally driven in the same direction as shown by an arrow C in FIG.

Ball bearings (not shown) are incorporated in the respective holders 27 and 31, and the thrust and radial loads of the swivel tables 28 and 32 are supported by the holders 27 and 31 via the ball bearings.

A lower jig 34 is mounted on the lower swivel table 28, and the lower jig 34 is indexed and rotationally driven by the lower swivel motor 29. The lower jig 34 includes a shaft portion 34a in the vertical direction and a substantially quadrilateral clamp portion 34b provided at the tip of the shaft portion 34a. The clamp portion 34b faces in a direction perpendicular to the shaft portion 34a, that is, in a horizontal direction. An upper jig 35 is attached to the upper swivel table 32 so as to face the lower jig 34, and the upper jig 35 is indexed and rotationally driven by the upper swivel motor 33. The upper jig 35 includes a shaft portion 35a in the vertical direction and a substantially quadrilateral clamp portion 35b provided at the tip of the shaft portion 35a. The clamp portion 35b faces the clamp portion 34b.

FIG. 9A shows a laminate S formed by stacking a plurality of films, that is, optical films K. Each optical film K has a resin film made of a polyvinyl alcohol-based resin and a protective film laminated on the surface thereof, and is formed by laminating a plurality of resin films. The optical film K is attached to a liquid crystal cell having a liquid crystal layer or the like, and a liquid crystal panel including the optical film K and the liquid crystal cell is manufactured. The optical film K is previously cut into a shape substantially corresponding to the shape of the liquid crystal panel and has a thickness of 1 mm or less, and the thickness is exaggerated in FIG.

The illustrated optical film K is, for example, a polarizing film used as a display of a portable terminal device such as a smartphone or a tablet or a personal computer, and is generally rectangular. Curved surfaces are formed at the four corners of the optical film K, and the curved surfaces have an arcuate shape, which is also called an R portion. A backing plate J having the same size as the optical film K is arranged on the lower surface and the upper surface of the laminated body S. The backing plate J is for preventing deformation of the optical film K at the upper and lower ends of the laminated body S, and is formed by a resin having a hardness higher than that of the optical film K or when a resin of the same type as the optical film K is used. Is formed by increasing the thickness or laminating a plurality of films.

FIG. 9B shows the clamp portion 34b of the lower jig 34, and FIG. 9C shows the laminate S loaded on the lower jig 34. When the clamp head 25 is driven downward by the clamp cylinder 37 while the laminate S is loaded on the lower jig 34, the upper jig 35 comes into contact with the laminate S. As a result, the laminated body S is sandwiched between the clamp portion 34b of the lower jig 34 and the clamp portion 35b of the upper jig 35. When the upper jig 35 comes into contact with the laminated body S, the load of the clamp head 25 is not applied to the upper jig 35 by the balance cylinder 26 that supports the clamp head 25.

FIG. 10 is a side view showing the laminated body S sandwiched between the lower jig 34 and the upper jig 35. The size of both clamp portions 34b and 35b is smaller than that of the cut optical film K. Therefore, as shown in FIG. 10, the outer peripheral portion of the laminated body S protrudes outward from the outer peripheral surfaces of the clamp portions 34b and 35b. Assuming that the protrusion amount of the outer peripheral portion is T, the cutting allowance, that is, the finishing allowance V cut by the cutting process is set to the protrusion amount T or less (V ≦ T). The lower jig 34 and the upper jig 35 are interchangeable according to the size of the optical film K, the lower jig 34 is detachably mounted on the swivel table 28, and the upper jig 35 is mounted on the swivel table 32. It is removable and attached.

As shown in FIGS. 1 to 6, the horizontal beam member 36 is attached to the upper surface of the clamp column 22, and the horizontal beam member 36 protrudes above the clamp head 25. A clamp cylinder 37 made of a pneumatic cylinder is attached to the horizontal beam member 36. The piston rod 37a of the clamp cylinder 37 is substantially coaxial with the rotation center axis of the swivel table 32, protrudes toward the clamp head 25, and is driven in the vertical direction. A linear encoder 38 is provided on the horizontal beam member 36 in order to detect the distance between the clamp head 25 and the horizontal beam member 36. In FIG. 7, the horizontal beam member 36 is removed, and the upper surfaces of the column 20 and the clamp head 25 are shown.

A fluid from a fluid pressure supply source (not shown) is supplied to the clamp cylinder 37 via a flow path switching valve, and the flow path switching valve causes the clamp cylinder 37 to move the piston rod 37a up and down. The pressure of the fluid that is switched and supplied to the clamp cylinder 37 is adjusted by an electropneumatic regulator (not shown) that converts the electrical signal into pressure. The adjusted pressure sets a clamping force on the laminate S by the lower jig 34 and the upper jig 35.

As shown in FIG. 6, a support plate 41 is provided on the clamp head 25, and a pressure sensor 42 is attached to the support plate 41. The pressure sensor 42 is located below the piston rod 37a, and the clamping force applied by the clamp cylinder 37 to the laminate S via the clamp head 25 is detected by the pressure sensor 42. As the pressure sensor 42, for example, a strain gauge type load converter, that is, a load cell is used.

A floating joint 43 is mounted between the pressure sensor 42 and the piston rod 37a. As shown in FIG. 8, the floating joint 43 has a case 44 attached to the tip of the piston rod 37a. Two rings 45, each of which are movable in the radial direction, are mounted in the case 44 through a gap, and a ball 46 is incorporated between the two rings 45. The ball 46 is provided on the stud 47, which is attached to the pressure sensor 42.

When the clamp head 25 is moved downward by the clamp cylinder 37 while the upper jig 35 is in contact with the laminated body S, a clamping force is applied to the upper jig 35 via the clamp head 25. As a result, the laminated body S is clamped by applying a tightening force between the lower jig 34 and the upper jig 35. When the reaction force of the clamping force is applied to the piston rod 37a, an external force is applied to the horizontal beam member 36 in the direction in which the tip thereof is directed upward, and an external force in the direction in which the tip portion is inclined is applied to the clamp column 22. Even if the clamp column 22 is elastically deformed in the direction of inclination due to the clamping force, since the main column 21 is separated from the clamp column 22, no clamping force is applied to the main column 21, and the clamp head 25 It does not shift in the horizontal direction.

Moreover, even if the piston rod 37a is tilted due to the reaction force of the clamp force, the ring 45 moves in the radial direction while sliding along the ball 46 of the floating joint 43, so that the clamp head 25 does not tilt. As a result, even if a large clamping force is applied to the laminated body S, the coaxiality of the rotation center axes of the lower jig 34 and the upper jig 35 is maintained with high accuracy.

In the laminate S made of the optical film K having a relatively small size, it is not necessary to increase the clamping force. Therefore, the column 20 is not formed by the main column 21 and the clamp column 22, and a predetermined coaxiality is maintained. Is possible. On the other hand, when the laminated body S for which it is necessary to increase the clamping force is clamped, if the column 20 is formed by the main column 21 and the clamp column 22, the coaxiality between the lower jig 34 and the upper jig 35 Can be maintained and the processing accuracy can be improved.

When the laminate S is indexed and rotated, both the swivel motors 29 and 33 are synchronized with the lower jig under the state where the laminate S is tightened between the lower jig 34 and the upper jig 35. Both the 34 and the upper jig 35 are rotated. When both the upper and lower jigs are rotationally driven in this way, the optical film K constituting the laminated body S does not shift in the rotation direction, both jigs can be rotated at high speed, and the indexing rotation accuracy is improved. be able to. Moreover, when the laminated body S is rotated, only the upper and lower swivel tables 28 and 32, the lower jig 34 and the upper jig 35 are rotationally driven, so that the inertial force at the time of rotation does not increase.

As shown in FIGS. 1 to 4, the first horizontal support 51a and the second horizontal support 51b are arranged on the bed 11 so as to face perpendicular to the guide rail 12, and both horizontal support. The 51a and 51b face each other with a moving space of the slide base 13 and the column 20 separated from each other. The headstock 53a is movably mounted on the guide rail 52a provided on the horizontal support 51a, and the tool feed motor 54a is horizontally driven to drive the headstock 53a horizontally as shown by an arrow D in FIG. It is attached to the support base 51a. The tool feed motor 54a rotationally drives a feed screw shaft screwed to a nut (not shown) attached to the headstock 53a, and the tool feed motor 54a guides the headstock 53a to a guide rail 52a to move the headstock 53a. A first spindle 55a is rotatably provided on the headstock 53a, and the spindle 55a is rotationally driven by a tool rotation motor 56a provided on the headstock 53a. A first cutting disc 57a is attached to the tip of the spindle 55a, and the cutting disc 57a is rotationally driven as shown by an arrow E in FIG. The direction of rotation may be opposite. A plurality of cutting edge tips 58a are provided on the front surface of the cutting disk 57a. As described above, the above-mentioned member provided on the horizontal support 51a constitutes a first cutting mechanism for cutting one flat surface of the laminated body S.

The horizontal support 51b is provided with a second cutting mechanism for cutting another flat surface parallel to the one flat surface of the laminated body S. The members constituting the second cutting mechanism and having a function common to the above members are assigned the same number as the reference numeral b instead of the above-mentioned reference numeral a, and repeated description thereof will be omitted. The cutting disk 57b constituting the second cutting mechanism is the second cutting disk.

As shown in FIG. 9, the laminated body S is a quadrilateral having a long side and a short side when viewed from a plane, and arc planes indicated by reference numerals R are provided at the four corners. Therefore, the laminated body S has a total of four flat surfaces, one is a flat surface corresponding to two long sides and parallel to each other, and the other is a flat surface corresponding to two short sides and parallel to each other. These four flat surfaces are finished by the cutting disk 57a of the first cutting mechanism and the cutting disk 57b of the second cutting mechanism.

When finishing flat surfaces parallel to each other, the headstocks 53a and 53b are positioned at predetermined positions by the tool feed motors 54a and 54b, and the tips of the cutting edge tips 58a and 58b are on the outer peripheral surface of the laminate S. You can guess. In order to detect the positions of the cutting edge tips 58a and 58b, a touch switch, that is, a blade edge sensor 59a and 59b is provided on the main column 21 so as to project from the front surface of the main column 21, as shown in FIG. The cutting edge sensors 59a and 59b are positioned in front of the cutting discs 57a and 57b by moving the column 20. Further, the cutting discs 57a and 57b are moved toward the cutting edge sensors 59a and 59b by the headstocks 53a and 53b, and the cutting discs 57a and 57b are indexed and rotated to determine the cutting edge positions of the cutting edge tips 58a and 58b in advance. Adjustments can be made.

As shown in FIGS. 1 and 3, a vertical support 61 is attached to the tip end side of the bed 11 facing the column 20, and a processing head 63 is attached to a guide member 62 provided on the vertical support 61 in the vertical direction. Is provided. The machining head 63 is provided with a spindle 65, and the spindle 65 is rotationally driven by a tool rotation motor 64. An end mill 66 is detachably mounted on the spindle 65. The end mill 66 is made of a rod-shaped member, and a plurality of cutting edges extending in the axial direction are formed on the outer peripheral surface thereof, and the central axis of rotation is oriented in the vertical direction. In order to adjust the vertical position of the machining head 63, the guide member 62 is provided with a vertical adjustment screw shaft 67, and the machining head 63 is provided with a vertical adjustment screw shaft 67 as shown by an arrow F in FIG. Will be moved. The feed screw connected to the vertical adjusting screw shaft 67 is screw-coupled to a nut provided on the machining head 63.

The base end of the end mill 66 is attached to the spindle 65 and is a cantilever type. However, when the tip of the end mill 66 is supported by a support member, the end mill 66 becomes a double-sided type. A portable end mill may be used.

When the outer peripheral surface of the laminate S is finished, the laminate S is loaded on the lower jig 34 while the upper jig 35 is separated from the lower jig 34. As shown in FIGS. 1 to 4, a positioning mechanism 71 is provided on the horizontal support 51b in order to position the loaded laminate S at a predetermined position on the lower jig 34. The positioning mechanism 71 has a pedestal 72 attached to the horizontal support pedestal 51b and a holder 73 attached to the pedestal 72, and the holder 73 has a sliding block 74 horizontally as shown by an arrow G in FIG. It is mounted so that it can move in the direction. A positioning member 76 is attached to the tip of the support rod 75 attached to the sliding block 74. As shown in FIG. 1, the positioning member 76 includes a positioning portion 76a provided with a positioning surface perpendicular to the moving direction, and a positioning portion 76b provided with a positioning surface perpendicular to the positioning surface. There is. The holder 73 is provided with a positioning motor 77 in order to drive the positioning member 76. The positioning motor 77 drives a feed screw (not shown) that is screw-coupled to a female screw provided on the sliding block.

FIG. 11 is a block diagram showing a control unit of the cutting apparatus 10, and a signal is sent to the microcontroller 80 from an operation panel 81 provided with an apparatus start switch or the like. The detection signals of the linear encoder 38 and the pressure sensor 42 are sent to the microcontroller 80. The microcontroller 80 outputs a control signal to the electropneumatic regulator 82 that adjusts the pressure of the fluid supplied to the balance cylinder 26, and the flow path switching valve 83 provided between the clamp cylinder 37 and the fluid pressure supply source. , A control signal is output to the electropneumatic regulator 84 that adjusts the pressure of the fluid supplied to the clamp cylinder 37. Further, each motor such as the column feed motor 17 described above is controlled by the microcontroller 80. The microcontroller 80 has a microprocessor that calculates a control signal for finishing the outer peripheral surface of the laminated body S, and a memory that stores a control program, a calculation formula, map data, and the like.

The operation of each motor, flow rate switching valve, etc. is controlled based on a program stored in the microprocessor, and the outer peripheral surface of the laminated body S is finished.

Next, an example of a processing method for finishing the outer peripheral surface of the laminated body S by the cutting processing apparatus 10 will be described with reference to FIGS. 12 to 16.

The laminate S is loaded on the lower jig 34. When the laminate S is loaded, the clamp head 25 is driven up in advance by the balance cylinder 26. At this time, the piston rod 37a of the clamp cylinder 37 follows the movement of the clamp head 25. Further, the column 20 is moved by the column feed motor 17 from the standby position shown in FIG. 1 toward the loading position in front of the column 20. FIG. 12A shows a state in which the clamp portion 34b of the lower jig 34 is moved to the loading position due to the movement of the column 20.

In this state, the positioning motor 77 is driven and the positioning member 76 advances toward the lower jig 34. FIG. 12B shows a state in which the positioning member 76 has been moved to the forward limit position. Under this state, a gap P corresponding to the protrusion amount T shown in FIG. 10 is provided between the positioning member 76 and the outer peripheral surface of the clamp portion 34b of the lower jig 34. FIG. 12C shows a state in which the laminated body S is loaded on the lower jig 34. At this time, the outer peripheral surface of the laminated body S protrudes from the outer peripheral surface of the clamp portion 34b by the amount of protrusion T.

As shown in FIG. 12C, the optical film K constituting the laminated body S is entirely quadrilateral and has two long sides L1, similar to those shown in FIGS. 9 and 10. It has L2 and two short sides M1 and M2, and arcuate surfaces R are provided at the four corners.

With the laminate S positioned on the lower jig 34 in this way, the clamp cylinder 37 is driven and the upper jig 35 comes into contact with the laminate S by the downward movement of the clamp head 25. The contact of the upper jig 35 with the laminated body S is detected by stopping the pulse signal from the linear encoder 38. It is determined from the detection signal from the pressure sensor 42 that a predetermined clamping force is applied to the laminated body S by the clamp cylinder 37.

The clamping force differs depending on the type of the laminated body S, and the clamping force data is input to the memory of the microcontroller 80 according to the type of the laminated body to be processed. The weight of the clamp head 25 including the upper jig 35 also differs depending on the type of the upper jig 35 corresponding to the laminated body, and the weight of the clamp head 25 becomes the laminated body S due to the air pressure applied to the balance cylinder 26. Zero balance is maintained so that it does not directly participate. A predetermined clamping force according to the type of the laminated body S is set by the electropneumatic regulator 84.

When a large clamping force is applied to the laminate S, a load is applied to the horizontal beam member 36 in a direction in which the tip portion thereof is lifted, and as shown in FIG. 8, the central axis O of the clamp cylinder 37 is the upper jig 35. The lower jig 34 is tilted with respect to the rotation center axis O1, but since the floating joint 43 is provided between the piston rod 37a and the clamp head 25, the rotation center axis O1 of the upper jig 35 is It does not tilt. As a result, even if a large clamping force is applied to the laminated body S, no external force is applied in the direction of shifting the optical film K. Moreover, the column 20 shown in the figure includes a main column 21 that supports the clamp head 25 and a clamp column 22 that supports the clamp cylinder 37, and since these are separated from each other, the horizontal beam member 36 and the horizontal beam member 36 are separated by a clamping force. Even if the clamp column 22 is elastically deformed, these elastic deformations are not transmitted to the main column 21 and the clamp head 25. As a result, the main column 21 is not elastically deformed even if a large clamping force is applied to the large-sized laminated body S.

Both cutting discs 57a, 57b are then moved forward by the tool feed motors 54a, 54b, respectively, so as to approach each other from distant positions, as shown in FIG. FIG. 13A shows a state in which the laminated body S is clamped and both cutting disks 57a and 57b are spaced apart from each other in this way. Under this state, as shown in FIG. 13B, the cutting discs 57a and 57b are rotationally driven by the tool rotation motors 56a and 56b, and the laminated body S is cut and fed by the column feed motor 17. Will be done. When the cutting feed is sent, the two long sides L1 and L2 are finished at the same time by the cutting disks 57a and 57b. In this way, the flat surface can be finished by moving the laminated body S without cutting the cutting discs 57a and 57b.

Note that FIG. 13 shows the laminated body S supported by the lower jig 34, and the upper jig 35 is not shown. This also applies to FIGS. 14 to 16.

When the finishing of the long sides L1 and L2 is completed, both cutting disks 57a and 57b are moved backward in order to finish the short sides M1 and M2 of the laminated body S as shown in FIG. 14 (A). At the same time, the laminated body S is indexed and rotated by 90 degrees. As described above, the finishing of the long sides L1 and L2 and the short sides M1 and M2, which are the flat surfaces of the laminated body S, is performed by the linear motion of the slide base 13. At this time, the lower jig 34 is rotationally driven by the swivel motor 29, and the upper jig 35 is rotationally driven by the swivel motor 33 in synchronization with the lower jig 34, so that each jig is indexed and rotated at high speed. Even if this is done, the optical film K does not shift in the rotation direction, and the cutting efficiency can be improved while improving the cutting accuracy.

As shown in FIG. 14B, the indexed and rotated laminate S is rotationally driven by the cutting disks 57a and 57b, respectively, and the laminate S is cut and fed by the column feed motor 17. When the cutting feed is sent, the two short sides M1 and M2 are finished at the same time by the cutting disks 57a and 57b. In this way, except for the arcuate surface R, the four flat surfaces of the laminated body S are each finished by the finishing allowance V shown in FIG.

The column 20 is then driven forward by the column feed motor 17, and the laminate S is brought closer to the end mill 66, as shown in FIG. As shown in FIG. 15A, the radial center line of the rotation center axis O2 of the end mill 66 and the radial center line of the rotation center axis O1 of the upper and lower jigs are located at the same line N. The end mill 66 is arranged. 5 and 15 (A) show a state in which the short side M1 is in contact with the end mill 66, and the end mill 66 is in contact with the center of the short side M1. As shown in FIG. 14B, if the column 20 is moved forward as it is after the finishing of the short sides M1 and M2 is completed, the end mill 66 comes into contact with the center of the long side. The end mill 66 may be brought into contact with either the short side or the long side.

As shown in FIG. 15 (A), the short side M1 approaches the end mill 66, the laminated body S is linearly moved by the column 20 as shown by the arrow A, and is indexed and rotated as shown by the arrow C. .. As a result, the arcuate surface R of the laminated body S is moved to the position of the end mill 66. When the arcuate surface R reaches the position of the end mill 66, the laminated body S is linearly moved and indexed and rotated to be cut and fed. As a result, the finishing allowance V of the arc surface R is finished by the end mill 66. When this finishing process is completed, the laminated body S is linearly moved and indexed and rotated while the rotation of the end mill 66 is stopped.

FIG. 15C shows a state in which the end mill 66 is in contact with the long side L2, and FIG. 15D shows a state in which the end mill 66 is in contact with the center of the long side L2. As described above, the four arcuate surfaces R other than the long side and the short side that have already been finished are finished by the end mill 66 while linearly moving the laminated body S and indexing and rotating the laminate S. As described above, the processing of the arcuate surface R by the end mill 66 is performed by the linear motion of the slide base 13 and the swivel motion of the laminated body S by the swivel motors 29 and 33 on the upper and lower sides.

Since the above-mentioned cutting apparatus 10 includes two cutting discs 57a and 57b for finishing the flat surface of the laminated body S and an end mill 66 for finishing the arc surface R, the arc surface R is provided. Instead, both the laminated body in which all the surfaces to be finished are flat and the laminated body S having an arcuate surface R can be finished by the same cutting processing device 10. That is, the cutting processing device 10 is It is a hybrid type, that is, a general-purpose type, which includes cutting discs 57a and 57b for cutting a flat surface and an end mill 66 for cutting an arc surface. In particular, by finishing the flat surface with the cutting discs 57a and 57b, the outer peripheral surface can be efficiently processed.

On the other hand, the cutting apparatus having the cutting disks 57a and 57b and not having the end mill 66 is dedicated to finishing the flat surface of the laminated body in which the optical films K having no arcuate surfaces R at the four corners are laminated. Become a mold.

Further, the cutting disks 57a and 57b are not provided, but only the end mill 66 is provided, and the entire outer peripheral surface including the flat surface and the arc surface R of the laminated body S can be finished by the end mill 66. In such a dedicated cutting apparatus, as shown in FIG. 15, the laminated body S is linearly moved under a state where the end mill 66 is brought into contact with the outer peripheral surface of the laminated body S and is rotationally driven. By indexing and rotating together, the entire circumference can be machined.

FIG. 16 shows a laminated body S made of an optical film K having a concave surface H provided on one short side M1 in addition to the arc surface R. As described above, in the laminated body S provided with the concave surface H, the concave surface H can be finished by the end mill 66. When finishing the outer peripheral surface of such a laminated body S, as described above, the entire outer peripheral surface may be machined by the end mill 66 by a cutting apparatus provided only with the end mill 66, and the general purpose shown is shown. The flat surface may be finished by the cutting discs 57a and 57b, and the arcuate surface R and the concave surface H may be finished by the end mill 66 by the cutting apparatus 10 of the mold.

In any form of cutting apparatus, the lower jig 34 and the upper jig 35 are synchronously driven to rotate by two swivel motors, so that the optical film K constituting the laminated body S is displaced in the rotational direction. It is possible to finish the outer peripheral surfaces of a plurality of optical films K with high accuracy. Moreover, since the laminated body S can be indexed and rotated at high speed, the finishing processing efficiency can be improved.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist thereof. For example, the shape of the film that can be finished may be a film having a convex surface on the outer peripheral surface, or a film having a curved outer peripheral surface as a whole. Further, as the film for finishing the outer peripheral surface, various films other than the optical film can be finished.

11 Bed 12 Guide rail 13 Slide base 17 Column feed motor 20 Column 21 Main column 22 Clamp column 25 Clamp head 26 Balance cylinder 27 Holder 28 Swivel table 29 Swivel motor 31 Holder 32 Swivel table 33 Swivel motor 34 Lower jig 35 Upper surface Jig 36 Horizontal beam member 37 Clamp cylinder 42 Pressure sensor 43 Floating joint 51a First horizontal support 51b Second horizontal support 53a, 53b Headstock 54a, 54b Tool feed motor 55a First spindle 55b Second spindle 56a , 56b Tool rotation motor 57a, 57b Cutting disk 61 Vertical support 63 Machining head 64 Tool rotation motor 65 Spindle 66 End mill 67 Vertical adjustment screw shaft 71 Positioning mechanism 76 Positioning member

Claims (4)

A cutting device that cuts the outer peripheral surface of a laminated body in which a plurality of films are stacked.
A lower swivel motor that is attached to a slide base that is horizontally movable on the bed and swivels the lower jig.
A rectangular parallelepiped main column attached to the slide base and hollow inside,
A clamping head which is movably mounted in the vertical direction to the main column,
An upper swivel motor that is provided on the clamp head and that swivels the upper jig that clamps the laminate by the lower jig in synchronization with the lower swivel motor.
A clamp column provided with a gap between the inner surface of the main column and the clamp column arranged inside the main column and attached to the slide base.
A clamp cylinder provided on a horizontal beam member mounted on the clamp column and pressurizing the clamp head to apply a clamping force to the laminated body via the clamp head.
A cutting mechanism that is placed on the bed and cuts the outer peripheral surface of the laminate,
Cutting equipment with. The cutting apparatus according to claim 1, wherein a floating joint having a ball is mounted between the piston rod of the clamp cylinder and the clamp head . In the cutting apparatus according to claim 1 or 2, a balance cylinder for driving the clamp head in the vertical direction is provided in the main column, and the balance cylinder sets a contact force of the upper jig with respect to the laminated body to set the clamp. A cutting device that sets the clamping force with a cylinder. In the cutting apparatus according to any one of claims 1 to 3, a pressure sensor is provided between the piston rod of the clamp cylinder and the clamp head, and the clamping force is detected by the pressure sensor. apparatus.

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