WO2014169402A1 - Procédé et appareil de coupe - Google Patents

Procédé et appareil de coupe Download PDF

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Publication number
WO2014169402A1
WO2014169402A1 PCT/CN2013/000449 CN2013000449W WO2014169402A1 WO 2014169402 A1 WO2014169402 A1 WO 2014169402A1 CN 2013000449 W CN2013000449 W CN 2013000449W WO 2014169402 A1 WO2014169402 A1 WO 2014169402A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotary shaft
cutting
workpiece
end surface
cutting blade
Prior art date
Application number
PCT/CN2013/000449
Other languages
English (en)
Inventor
Yuichi Shiraishi
Munekata OKUBO
Shuzo Matsumoto
Donglin Li
Original Assignee
Sumitomo Chemical Company,Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Chemical Company,Limited filed Critical Sumitomo Chemical Company,Limited
Priority to CN201380075616.9A priority Critical patent/CN105121074B/zh
Priority to PCT/CN2013/000449 priority patent/WO2014169402A1/fr
Priority to KR1020157029654A priority patent/KR102037564B1/ko
Priority to JP2015544308A priority patent/JP6045122B2/ja
Priority to TW103113642A priority patent/TWI629151B/zh
Publication of WO2014169402A1 publication Critical patent/WO2014169402A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
    • B23Q15/007—Automatic control or regulation of feed movement, cutting velocity or position of tool or work while the tool acts upon the workpiece
    • B23Q15/18—Compensation of tool-deflection due to temperature or force
    • 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
    • G05B2219/37—Measurements
    • G05B2219/37428—Temperature of tool
    • 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
    • G05B2219/49—Nc machine tool, till multiple
    • G05B2219/49206—Compensation temperature, thermal displacement, use measured temperature

Definitions

  • the present invention relates to a cutting method and a cutting apparatus.
  • a cutting method disclosed in PTL 1 has been known as a cutting method of cutting an end surface of a workpiece.
  • a cutting method of cutting an end surface of a workpiece when the end surface of an optical member such as a polarizing plate is cut, and a cutting region formed by a rotating cutting blade is brought into contact with the end surface of the optical member to perform the cutting, a portion apart from a
  • predetermined virtual line within the cutting region is brought into contact with the end surface of the optical member.
  • the present invention is made in view of such circumstances, and an object is to provide a cutting method and a cutting apparatus which can satisfy the strictly required dimensions of a workpiece.
  • the present invention employs the following means.
  • a cutting method to cut an end surface of a workpiece which comprises providing a cutting unit having a rotary shaft and a cutting blade protruding toward the end surface side of the workpiece; rotating the cutting blade around the rotary shaft; cutting the end surface of the workpiece by bringing the rotating cutting blade into contact with the end surface of the workpiece; measuring a predetermined parameter indicating an overheated condition of the cutting unit after completing a predetermined number of batches of a cutting process; and adjusting a relative position between the cutting blade and an end surface of the workpiece to be cut in a subsequent batch, before beginning the cutting process of the subsequent batch.
  • a relative position between the cutting blade and an end surface of the workpiece to be cut in a subsequent batch may be adjusted such that external dimensions of the workpiece, which are to be obtained by the cutting process of the subsequent batch, are not beyond a required allowance such as that given by the product specification of the workpiece.
  • a thermal expansion amount of the rotary shaft after cutting may be measured as the predetermined parameter.
  • a temperature around the rotary shaft after cutting may be measured as the predetermined parameter; and the adjustment may be performed based on data of a thermal expansion amount of the rotary shaft corresponding to the measured temperature.
  • the rotary shaft may be rotatably supported by bearings, and both the rotary shaft and the bearings may be covered with a cover, and the rotary shaft and the cover may be capable of heat conduction via the bearing, and a temperature of the cover may be measured as the temperature around the rotary shaft.
  • a cutting method to cut an end surface of a workpiece which comprises providing a cutting unit having a rotary shaft and a cutting blade protruding toward the end surface side of the workpiece; rotating the cutting blade around the rotary shaft; and cutting the end surface of the workpiece by bringing the rotating cutting blade into contact with the end surface of the workpiece; wherein the rotary shaft is cooled in order for the rotary shaft not to be thermally expanded.
  • the rotary shaft may be cooled in order for the rotary shaft not to be thermally expanded, such that external dimensions of the workpiece would not be beyond a required allowance such as that is given in the product specification of the workpiece.
  • the rotary shaft may be rotatably supported by bearings, and both of the rotary shaft and the bearings may be covered with a cover, the rotary shaft and the cover may be capable of heat conduction via the bearing, and the cooling may be performed by an external cooling of the cover by means of a coolant.
  • the rotary shaft may be rotatably supported by bearings, and both the rotary shaft and the bearings may be covered with a cover, the rotary shaft and the cover may be capable of heat conduction via the bearing, and the cooling may be performed by blowing cooling air onto the cover.
  • a cutting method to cut an end surface of a workpiece which comprises providing a cutting unit having a rotary shaft and a cutting blade protruding toward the end surface side of the workpiece; rotating the cuttingmen around the rotary shaft; cutting the end surface of the workpiece by bringing the rotating cutting blade into contact with the end surface of the workpiece; wherein the rotary shaft has been heated in advance up to a saturated condition where thermal expansion of the rotary shaft no longer occurs.
  • the rotary shaft may have been heated in advance up to a saturated condition where thermal expansion of the rotary shaft no longer occurs, such that external dimensions of the workpiece would not be beyond a required allowance such as that given in the product specification of the workpiece.
  • the heating may be performed by allowing an idling rotation of the rotary shaft before performing a cutting process of the workpiece.
  • a cutting apparatus to cut an end surface of a workpiece, which comprises a processing device comprising a cutting unit having a rotary shaft and a cutting blade protruding toward the end surface side of the workpiece, the cutting blade being rotatable around the rotary shaft and the end surface of the workpiece being cuttable by bringing the rotating cutting blade into contact with the end surface of the workpiece; and a controlling device that controls adjusting a relative position between the cutting blade and an end surface of a workpiece to be cut in the subsequent batch before beginning a cutting process of a subsequent batch, based on a predetermined parameter indicating an overheated condition of the cutting unit after completing a predetermined number of batches of the cutting process.
  • the controlling device controls adjusting a relative position between the cutting blade and an end surface of a workpiece to be cut in the subsequent batch, such that external dimensions of the workpiece to be obtained by the cutting process of the subsequent batch are not beyond a required allowance such as that given in the product specification of the workpiece.
  • a dimension sensor which measures a thermal expansion amount of the rotary shaft after cutting may be further provided as the predetermined parameter.
  • a temperature sensor which measures a temperature around the rotary shaft after cutting as the predetermined parameter may be further provided, and the controlling device may perform the adjustment based on data of a thermal expansion amount of the rotary shaft corresponding to a measurement result of the temperature sensor.
  • bearings rotatably supporting the rotary shaft and a cover covering both of the rotary shaft and the bearings may be further provided, the rotary shaft and the cover may be capable of heat conduction via the bearing, and the temperature sensor may measure a temperature of the cover as the temperature around the rotary shaft.
  • a cutting apparatus to cut an end surface of a workpiece, which comprises a processing device including a cutting unit having a rotary shaft and a cutting blade protruding toward the end surface side of the workpiece, the cutting blade being rotatable around the rotary shaft and the end surface of the workpiece being cuttable by bringing the rotating cutting blade into contact with the end surface of the workpiece; and a controlling device that performs a control where the rotary shaft is cooled in order for the rotary shaft not to be thermally expanded.
  • the controlling device may perform a control where the rotary shaft is cooled in order for the rotary shaft not to be thermally expanded, such that external dimensions of the workpiece would not be beyond a required allowance.
  • bearings rotatably supporting the rotary shaft, a cover covering both of the rotary shaft and the bearings, and a cooling unit capable of external cooling of the cover by means of a coolant may be further provided, the rotary shaft and the cover may be capable of heat conduction via the bearing, , and the controlling device may control the cooling unit performing the external cooling of the cover.
  • bearings rotatably supporting the rotary shaft, a cover covering both the rotary shaft and the bearings, and an air-cooling unit capable of blowing cooling air onto the cover may be further provided, the rotary shaft and the cover may be capable of heat conduction via the bearing, , and the controlling device may control the air-cooling unit of blowing the cooling air onto the cover.
  • a cutting apparatus to cut an end surface of a workpiece, which comprises a processing device including a cutting unit having a rotary shaft and a cutting blade protruding toward the end surface side of the workpiece, the cutting blade being rotatable around the rotary shaft and the end surface of the workpiece being cuttable by bringing the rotating cutting blade into contact with the end surface of the workpiece; and a controlling device that performs a control where the rotary shaft has been heated in advance up to a saturated condition where thermal expansion of the rotary shaft no longer occurs.
  • the controlling device may perform a control where the rotary shaft may have been heated in advance up to a saturated condition where thermal expansion of the rotary shaft no longer occurs, such that external dimensions of the workpiece would not be beyond a required allowance.
  • the controlling device may perform a control for allowing an idling rotation of the rotary shaft before performing a cutting process of the workpiece, as the heating.
  • FIG. 1 is a perspective view illustrating a cutting apparatus according to a first embodiment.
  • FIG. 2 is a side view of a cutting unit.
  • FIG. 3 is a schematic diagram illustrating an arrangement relationship of a rotary shaft, bearings and a cover.
  • FIG. 4 is a perspective view illustrating a cutting apparatus before attaching a rotating body.
  • FIG. 5 is a perspective view illustrating a cutting apparatus after attaching a rotating body.
  • FIG. 6 is a view illustrating a cutting method according to the first embodiment.
  • FIG. 7 is a view illustrating a relationship between the number of batches and a deviated amount from a reference value of external dimensions of a laminated body.
  • FIG. 8 is a perspective view illustrating a dimension sensor.
  • FIG. 9 is a schematic diagram illustrating an arrangement relationship between a dimension sensor and a cutting unit.
  • FIG. 10 is a view illustrating variations in external dimensions of a laminated body according to a comparative example.
  • FIG. 11 is a view illustrating variations in external dimensions of a laminated body in a long-side direction of an optical member according to the first embodiment.
  • FIG. 12 is a view illustrating variations in external dimensions of a laminated body in a short-side direction of an optical member according to the first embodiment.
  • FIG. 13 is a perspective view illustrating a temperature sensor.
  • FIG. 14 is a view illustrating a preparation method of a thermal expansion table indicating a relationship between a temperature of a cover and a thermal expansion amount of a rotary shaft.
  • FIG. 15 is a view illustrating variations in external dimensions of a laminated body in a long-side direction of an optical member according to a second embodiment.
  • FIG. 16 is a view illustrating variations in external dimensions of a laminated body in a short-side direction of an optical member according to the second embodiment.
  • FIG. 17 is a perspective view illustrating a cooling unit.
  • FIG. 18 is a perspective view illustrating an air-cooling unit (a blower).
  • FIG. 1 is a perspective view illustrating a cutting apparatus 1 using a cutting method according to a first embodiment of the present invention.
  • the cutting apparatus 1 is intended to cut an end surface of a workpiece.
  • the cut object is an end surface Wa of a rectangular parallelepiped laminated body W in which multiple sheets of an optical member F are superimposed.
  • the laminated body W can be obtained by punching a long raw sheet of monolayer sheet or laminated sheet into a rectangular shape.
  • the cut object is not limited to the laminated body W, but may be a single sheet of the optical member F.
  • the cut object can be other various members in addition to the laminated body W.
  • the sheet constituting the laminated body W includes polyvinyl alcohol film, cellulose-based film represented by triacetyl cellulose film, and ethylene acetate vinyl based film, but is not particularly limited thereto.
  • a polarizing plate is configured to have multi-layers of optical film, since the thickness of the polarizing plate is large, the polarizing plate is preferable as the cut object of the cutting apparatus 1 according to the present invention, which is capable of processing end surfaces of a large amount of film.
  • the cutting apparatus 1 includes a processing device (for example, a first processing device 2 and a second processing device 3 in the present embodiment), a moving device 4, a first position adjusting device 5, a second position adjusting device 6 and a controlling device 7.
  • a processing device for example, a first processing device 2 and a second processing device 3 in the present embodiment
  • a moving device 4 for example, a moving device 4, a first position adjusting device 5, a second position adjusting device 6 and a controlling device 7.
  • the first processing device 2 and the second processing device 3 are arranged to oppose each other by interposing the moving device 4.
  • a cutting unit 20 capable of cutting the end surface Wa of the laminated body W is arranged on the moving device 4 side. Rotating the cutting units 20 of both the first processing device 2 and the second processing device 3 enables two end surfaces Wa of the four end surfaces Wa of the laminated body W to be cut simultaneously and collectively.
  • FIG. 2 is a side view of the cutting unit 20.
  • the cutting unit 20 includes a rotary shaft 21 extending along a normal direction of the end surface Wa (refer to FIG. 1) of the laminated body W, a rotating body 22 rotating around the rotary shaft 21, a support 23 supporting the rotary shaft 21 and a plurality of cutting blades disposed on the rotating body 22 (for example, six cutting blades such as a first cutting blade 24a, a second cutting blade 24b, a third cutting blade 24c, a fourth cutting blade 24d, a fifth cutting blade 24e and a sixth cutting blade 24f in the present embodiment).
  • the first cutting blade 24a, the second cutting blade 24b, the third cutting blade 24c, the fourth cutting blade 24d, the fifth cutting blade 24e and the sixth cutting blade 24f may be collectively referred to as "cutting blade 24".
  • the rotating body 22 is fixed to the rotary shaft 21 and can be rotated in one direction around the rotary shaft 21.
  • the rotating body 22 has an installation surface 22a which is vertical with respect to the rotary shaft 21.
  • the rotating body 22 has a disk shape, but is not limited to the shape.
  • a diameter of the rotating body 22 is approximately 250 mm.
  • the diameter of the rotating body 22 is not limited thereto, and may be from 150 mm to 600 mm, for example.
  • the cutting blade 24 is disposed on the installation surface 22a of the rotating body 22.
  • the cutting blade 24 protrudes from the installation surface 22a toward the end surface Wa (refer to FIG. 1) side of the laminated body W.
  • the cutting blades 24a to 24c are configured to have an increased protruding amount from the installation surface 22a.
  • the first cutting blade 24a has the longest distance from the rotary shaft 21 and the smallest protruding amount from the installation surface 22a, and in contrast the third cutting blade 24c has the shortest distance from the rotary shaft 21 and the largest protruding amount from the installation surface 22a.
  • the first cutting blade 24a, the second cutting blade 24b, the fourth cutting blade 24d and the fifth cutting blade 24e are cutting blades for rough cutting and made of polycrystalline diamond.
  • the third cutting blade 24c and the sixth cutting blade 24f are cutting blades for finishing and made of a single crystal diamond. If the material is selected as a preferable form for the material of the cutting blade and is suitable for cutting the end surface Wa (refer to FIG. 1) of the laminated body W, the material is not particularly limited.
  • the number of the cutting blades is six, but without being limited thereto, may be appropriately varied depending on various conditions such as a distance from the rotary shaft 21 to the cutting blades. However, from the viewpoint of processing efficiency it is preferable to increase the number of the cutting blades as the distance from the rotary shaft 21 to the cutting blades becomes longer.
  • the arrangement of the cutting blades is not particularly limited, but from the viewpoint of processing efficiency, it is preferable to arrange a plurality of the cutting blades at a predetermined interval so as to have an equal distance from the rotary shaft 21.
  • a shape of the cutting blades is not particularly limited, but may be columnar, prismatic, the shape of cylinder whose cross section forms a trapezoidal shape and hemispherical.
  • the shape or size of the cutting blades may be appropriately set depending on dimensions of optical members and the required processing efficiency.
  • the cutting blades if disposed to protrude to the end surface Wa (refer to FIG. 1) side of the laminated body W, the cutting blades may be tilted with respect to the axial direction of the rotary shaft 21.
  • FIG. 3 is a schematic diagram illustrating an arrangement relationship of the rotary shaft 21, bearings 25 and a cover 26. Referring to FIG. 3, for convenience, the rotating body 22, the support 23 and the cutting blades 24 configuring the cutting unit 20 are not illustrated.
  • the cutting apparatus 1 (refer to FIG. 1) includes bearings 25 rotatably supporting the rotary shaft 21, and the cover 26 covering both of the rotary shaft 21 and the bearings 25.
  • the rotary shaft 21 and the cover 26 are configured to be capable of heat conduction via the bearings 25.
  • the material of the rotary shaft 21 is chromium-molybdenum steel
  • the material of the bearings is high carbon chromium steel
  • the material of the cover 26 is plain cast iron.
  • FIG. 4 is a perspective view illustrating the cutting apparatus 1 before attaching the rotating body 22.
  • FIG. 5 is a perspective view illustrating the cutting apparatus 1 after attaching the rotating body 22.
  • one end portion 21a of the rotary shaft 21 protrudes from one end portion of the cover 26.
  • the rotating body 22 is attached to the one end portion 21a (refer to FIG. 4) of the rotary shaft 21 protruding from one end portion of the cover 26.
  • the moving device 4 includes a base 40, a frame 41 with a gate shape, which is disposed on the base 40, a table 42 with a disk shape, which is disposed on the base 40, a first pressing member 43 arranged on the table 42, a cylinder 44 disposed at the base 40 side of the frame 41 and a second pressing member 45 attached to a tip of a rod of the cylinder 44.
  • the moving device 4 moves the laminated body W in a V direction in parallel to the longitudinal direction of the end surface Wa of the laminated body W with respect to the cutting unit 20.
  • the table 42 can rotate the first pressing member 43 around a central axis of the table 42.
  • the cylinder 44 can vertically move the second pressing member 45.
  • the laminated body W is fixed by being interposed between the first pressing member 43 and the second pressing member 45.
  • the base 40 can be moved so as to pass through between the first processing device 2 and the " second processing device 3.
  • the first pressing member 43 and the second pressing member 45 fix the laminated body W.
  • a normal direction of both end surfaces of the laminated body W is caused to match an extending direction of each rotary shaft 21 of the first processing device 2 and the second processing device 3.
  • the rotating body 22 is rotated and the base 40 is moved such that the laminated body W would pass through between the first processing device 2 and the second processing device 3.
  • the base 40 is moved in the direction V
  • the cutting blade 24, which are disposed on the installation surface 22a of the rotating body 22, are rotated and come into contact with the end surface Wa od the laminated body W, and thereby cut the end surface Wa.
  • the first cutting blade 24a and the fourth cutting blade 24d which are located at the outermost side of the rotating body 22 come into contact with the laminated body W and cut the end surface Wa thereof. If the base 40 moves ahead, subsequently the second cutting blade 24b and the fifth cutting blade 24e which are disposed at the inner side than the first cutting blade 24a and the fourth cutting blade 24d come into contact with the laminated body W and cut the end surface Wa thereof. Since the second cutting blade 24b and the fifth cutting blade 24e have a larger protruding amount than the first cutting blade 24a and the fourth cutting blade 24d, the end surface Wa cut by the first cutting blade 24a and the fourth cutting blade 24d is cut deeper.
  • the first cutting blade 24a, the second cutting blade 24b, the fourth cutting blade 24d and the fifth cutting blade 24e cut the end surface Wa of the laminated body W gradually deeper.
  • the third cutting blade 24c and the sixth cutting blade 24f which are for the finishing cut the end surface Wa of the laminated body W, to perform mirror finishing.
  • the first position adjusting device 5 adjusts the position of the first processing device 2. Specifically, the first position adjusting device 5 moves the first processing device 2 only in a direction Vf in parallel to the short-side direction of the optical member F configuring the laminated body W.
  • the second position adjusting device 6 adjusts the position of the second processing device 3. Specifically, the second position adjusting device 6 moves the second processing device 3 only in the direction Vf.
  • the controlling device 7 performs overall control on the first position adjusting device 5 and the second position adjusting device 6.
  • the controlling device 7 performs the control on the first position adjusting device 5 and the second position adjusting device 6, such that each of the first processing device 2 and the second processing device 3 would be moved only in the direction Vf.
  • the cutting method according to the present embodiment is a cutting method of the end surface Wa (refer to FIG. 1) of the laminated body W superimposed by multiple sheets of the optical member F, and is performed using the cutting apparatus 1 illustrated in FIG. 1.
  • FIG. 6 is a view illustrating the cutting method according to the preserft embodiment.
  • FIG. 6 is a view illustrating the cutting of the end surface Wa of the laminated body W using the cutting unit 20.
  • the end surface Wa of the laminated body W is cut by rotating the rotating body 22 clockwise and moving it in the direction V in parallel to the longitudinal direction of the end surface Wa of the laminated body W.
  • the rotating direction of the rotating body 22 is not limited to the (clockwise) direction illustrated in FIG. 6, but the end surface Wa of the laminated body W may be cut by rotating the rotating body 22 counterclockwise and moving it in the direction V in parallel to the longitudinal direction of the end surface Wa of the laminated body W.
  • the allowance of the product specification was wide, and for example the external dimension tolerance of the polarizing plate was + 0. 15 mm. Therefore, the variation width in external dimensions of the polarizing plate when cutting an end surface of the polarizing plate was able to be within the allowance of the product specification to obtain the polarizing plate which satisfies required dimensions.
  • FIG. 7 is a view illustrating a relationship between a batch number and a deviated amount from a reference value of the external dimensions of the laminated body W.
  • the number of batches means the number of times when the end surface
  • Wa of the laminated body W is subjected to the cutting process, and one batch means a process where four end surfaces Wa of one laminated body W are respectively cut once.
  • one batch means a process where four end surfaces Wa of one laminated body W are respectively cut once.
  • two end surfaces Wa out of the four end surfaces Wa of the laminated body W are cut simultaneously and collectively, two end surfaces Wa of the laminated body W in the longitudinal direction of the optical member F are first cut, and next rotating the table 42 by 90° and cutting the remaining two end surfaces Wa of the laminated body W in the short direction of the optical member F allow one batch to be completed.
  • FIG. 7 variations in the external dimensions of the laminated body W in the long-side direction of the optical member F are illustrated by a solid line, and variations in the external dimensions of the laminated body W in the short-side direction of the optical member F are illustrated by a dashed line.
  • the horizontal axis represents the number of batches [Nos.].
  • the vertical axis represents a deviated amount [mm] from a reference value of the external dimensions of the laminated body W. [0065]
  • cutting the end surfaces Wa of the laminated body W by a conventional method causes the number of batches to be increased and consequently increases the deviated amount from the reference value of the external dimensions of the laminated body W in each of the long-side direction and the short-side direction of the optical member F. Therefore, if the number of batches remains to be increased as it is, a variation width in the external dimensions of the polarizing plate during the cutting is beyond the management range of the product standards (for example, external dimension tolerance of the polarizing plate: ⁇ 0.05 mm). In FIG. 7, it will be apparent that the variation width in the external dimensions of the polarizing plate during the cutting is beyond the external dimension tolerance of the polarizing plate: + 0.05 mm if the number of batches is 22 or more.
  • the cutting method according to the present embodiment is a cutting method to cut the end surface Wa of the laminated body W, which includes providing the cutting unit 20 having the rotary shaft 21 extending along the normal direction of the end surface Wa of the laminated body W and having the cutting blade 24 protruding to the end surface Wa side of the laminated body W; rotating the cutting blade 24 around the rotary shaft 21; cutting the end surface Wa of the laminated body W by bringing the rotating cutting blade 24 into contact with the end surface Wa of the laminated body W;
  • the controlling device 7 based on the predetermined parameter indicating an overheated condition of the cutting unit 20 after completing the predetermined number of batches of the cutting process, controls for adjusting a relative position between the cutting blade 24 and the end surface Wa of the laminated body W which is subjected to the cutting process in a subsequent batch, before beginning the cutting process of the subsequent batch, such that external dimensions of the laminated body W, which are to be obtained by the cutting process of the subsequent batch, would not be beyond the required allowance defined by the product specification.
  • the predetermined number of batches of the cutting process is once or more, preferably once or more and 100 times or less, more preferably once or more and 50 times or less, further preferably once or more and 20 times or less.
  • the predetermined parameter indicating the overheated condition of the cutting unit 20 means a value indicating the thermal expansion amount of the rotary shaft 21 when the rotary shaft 21 is thermally expanded due to the influence of the rotation drive of the rotary shaft 21 or the friction between the rotary shaft 21 and the bearings 25.
  • the thermal expansion amount of the rotary shaft 21 after the cutting is measured as the predetermined parameter.
  • FIG. 8 is a perspective view illustrating a dimension sensor 30.
  • FIG. 9 is a schematic diagram illustrating an arrangement relationship between the dimension sensor 30 and the cutting unit 20.
  • the thermal expansion amount of the rotary shaft 21 after the cutting is measured using the dimension sensor 30.
  • the dimension sensor 30 it is possible to use a non-contact type dimension measuring instrument.
  • a hole 26h passing through the cover 26 is formed at a portion of the cover 26.
  • the hole 26h is arranged opposing an opposite side surface (hereinafter, in some cases, referred to as a rear surface of the rotating body 22) to the side where the cutting blade 24 of the rotating body 22 is disposed.
  • the dimension sensor 30 and a laser light emitting surface 30a are arranged at a position overlapped with the hole 26h when viewed from the normal direction of the rear surface of the rotating body 22.
  • the laser light is emitted from the laser light emitting surface 30a toward the rear surface of the rotating body 22.
  • the dimension sensor 30 measures a returning distance of the laser light between the laser light emitting surface 30a and the rear surface of the rotating body 22. In this manner, the thermal expansion amount of the rotary shaft 21 after the cutting is measured as a displacement amount in the direction Vf of the rotating body 22.
  • the controlling device 7 based on the measurement result of the dimension sensor 30, controls the first position adjusting device 5 and the second position adjusting device 6, and causes the first processing device 2 and the second processing device 3 to respectively move in the direction Vf.
  • the cutting method according to the present embodiment includes measuring, after completing a predetermined number of batches of a cutting process, the
  • FIG. 10 is a view illustrating variations in the external dimensions of the laminated body W in the long-side direction of the optical member F according to a comparative example.
  • FIG. 11 is a view illustrating variations in the external dimensions of the laminated body W in the long-side direction of the optical member F according to the present embodiment.
  • FIG. 12 is a view illustrating variations in the external dimensions of the laminated body in the short-side direction of the optical member F according to the present embodiment.
  • the horizontal axis represents the number of batches [Nos.].
  • the vertical axis represents a deviated amount [mm] from a reference value of the external dimensions of the laminated body W.
  • "The maximum value” represents the largest value out of variations in the deviated amount during one batch
  • "the minimum value” represents the smallest value out of the variations in the deviated amount during one batch
  • “the average value” represents a value obtained by averaging the variations in the deviated amount during one batch.
  • the relative position between the end surface Wa and the cutting blade 24 in the direction Vf is not adjusted. .
  • cutting the end surfaces Wa of the laminated body W causes the number of batches to be increased and consequently increases the deviated amount from the reference value of the external dimensions of the laminated body W. Therefore, if the number of batches remains to be increased as it is, a variation width in the external dimensions of the polarizing plate during the cutting is beyond the management range of the product standards (for example, ⁇ 0.05 mm). In FIG. 10, it will be appreciated that the variation width in the external dimensions of the polarizing plate during the cutting is beyond the management range (for example, ⁇ 0.05 mm) of the product standards if the number of batches is four or more.
  • the present embodiment includes measuring, after completing the predetermined number of batches of the cutting process, the displacement amount in the direction Vf of the rotating body 22 as the thermal expansion amount of the rotary shaft 21 after the cutting, and adjusting the relative position between, in the direction Vf, the cutting blade 24 and the end surface Wa of the laminated body W which is subjected to the cutting process in the subsequent batch, before beginning the cutting process of the subsequent batch, such that external dimensions of the laminated body W, which are to be obtained by the cutting process of the subsequent batch, would not be beyond the pre-specified allowance (for example, ⁇ 0.05 mm) defined by the product specification.
  • the pre-specified allowance for example, ⁇ 0.05 mm
  • the setting position of the cutting unit 20 is moved at a predetermined timing, it is possible to obtain the optical member F satisfying the required dimensions.
  • the displacement amount in the direction Vf of the rotating body 22 is measured as the thermal expansion amount of the rotary shaft 21 after the cutting, using the dimension sensor 30. Therefore, it is possible to accurately obtain an moving amount required for the cutting unit 20.
  • the moving device may move the cutting unit in the direction in parallel to the longitudinal direction of the end surface of the laminated body with respect to the end surface of the laminated body. That is, the moving device may be configured to relatively move the cutting unit in the direction in parallel to the longitudinal direction of the end surface of the laminated body with respect to the end surface of the laminated body.
  • a temperature around the rotary shaft 21 after cutting is measured as a predetermined parameter, and based on data of the thermal expansion amount of the rotary shaft 21, which corresponds to the measured temperature, a relative position is adjusted between the end surface Wa of the laminated body W which is subjected to the cutting process in the subsequent batch and the cutting blade 24.
  • FIG. 13 is a perspective view illustrating a temperature sensor 31 used in the cutting method of the present embodiment.
  • the temperature sensor 31 is a non-contact type temperature sensor and is arranged close to the cover 26.
  • the temperature sensor 31 measures the temperature of the cover 26 as the temperature around the rotary shaft 21 after the cutting.
  • a contact type temperature sensor may be used as the temperature sensor 31 .
  • the rotary shaft 21 and the cover 26 are capable of heat conduction via the bearings 25 (refer to FIG. 3).
  • a temperature table indicating a relationship between the temperature of the cover 26 and the temperature of the rotary shaft 21 is set in advance to measure the temperature of the cover 26 using the temperature sensor 31. This enables the temperature of the rotary shaft 21 to be indirectly measured.
  • thermo expansion table indicating the relationship between the temperature of the cover 26 and the thermal expansion amount of the rotary shaft 21 in advance can obtain the thermal expansion amount of the rotary shaft 21 after the cutting. That is, measuring the temperature of the cover 26 using the temperature sensor 31 enables the thermal expansion amount of the rotary shaft 21 to be indirectly measured after the cutting.
  • FIG. 14 is a view illustrating a preparation method of the thermal expansion table indicating the relationship between the temperature of the cover 26 and the thermal expansion amount of the rotary shaft 21.
  • the preparation method of the thermal expansion table can be prepared by setting the temperature of the cover 26 to a predetermined range and by measuring a displacement amount L in the direction Vf of the rotating body 22 as the thermal expansion amount of the rotary shaft 21 after the cutting, in the temperature within the predetermined range.
  • the controlling device 7 based on the data of the thermal expansion amount of the rotary shaft 21 corresponding to the measurement result of the temperature sensor 31 , controls the first position adjusting device 5 and the second position adjusting device 6, and causes the first processing device 2 and the second processing device 3 to respectively move in the direction Vf.
  • the temperature of the cover 26 is measured as the temperature around the rotary shaft 21 after the cutting, using the temperature sensor 31 ; and based on the data of the displacement amount L in the direction Vf of the rotating body 22 as the thermal expansion amount of the rotary shaft 21 corresponding to the measured temperature, the relative position between, in the direction Vf, the cutting blade 24 and the end surface Wa of the laminated body W which is subjected to the cutting process in the subsequent batch is adjusted using the controlling device 7, before beginning the cutting process of the subsequent batch, such that external dimensions of the laminated body W, which are to be obtained by the cutting process of the subsequent batch, would not be beyond the allowance defined by the product specification.
  • FIG. 15 is a view illustrating variations in the external dimensions of the laminated body W in the long-side direction of the optical member F according to the present embodiment.
  • FIG. 16 is a view illustrating variations in the external dimensions of the laminated body W in the short-side direction of the optical member F according to the present embodiment.
  • the horizontal axis represents the number of batches [Nos.].
  • the vertical axis represents a deviated amount [mm] from a reference value of the external dimensions of the laminated body W.
  • the maximum value represents the largest value out of variations in the deviated amount during one batch
  • the minimum value represents the smallest value out of the variations in the deviated amount during one batch
  • the average value represents a value obtained by averaging the variations in the deviated amount during one batch.
  • the temperature of the cover 26 is measured as the temperature around the rotary shaft 21 after the cutting; and based on the data of the displacement amount L in the direction Vf of the rotating body 22 as the thermal expansion amount of the rotary shaft 21 corresponding to the measured temperature, the relative position between, in the direction Vf, the cutting blade 24 and the end surface Wa of the laminated body W which is subjected to the cutting process in the subsequent batch is adjusted, before beginning the cutting process of the subsequent batch, such that external dimensions of the laminated body W, which are to be obtained by the cutting process of the subsequent batch, would not be beyond the required allowance (for example + 0.05 mm) defined by the product specification.
  • the required allowance for example + 0.05 mm
  • the temperature of the cover 26 is measured as the temperature around the rotary shaft 21 after the cutting, using the temperature sensor 31, and the displacement amount L in the direction Vf of the rotating body 22 is obtained as the thermal expansion amount of the rotary shaft 21, which corresponds to the measured temperature. Therefore, it is possible to accurately obtain an moving amount required for the cutting unit 20.
  • the cutting method according to the present embodiment is a cutting method for the end surface Wa of the laminated body W, which includes providing the cutting unit 20 having the rotary shaft 21 extending along the normal direction of the end surface Wa of the laminated body W and having the cutting blade 24 protruding toward the end surface Wa side of the laminated body W; rotating the cutting blade 24 around the rotary shaft 21 ; and cutting the end surface Wa of the laminated body W by bringing the rotating cutting blade 24 into contact with the end surface Wa of the laminated body W; wherein the rotary shaft 21 is cooled in order for the rotary shaft 21 not to be thermally expanded.
  • the controlling device 7 performs a control where the rotary shaft 21 is cooled in order for the rotary shaft 21 not to be thermally expanded, such that the external dimensions of the laminated body W would not be beyond the required allowance defined by the product specification.
  • the cooling is performed by an external cooling be means of a coolant. Specifically, the cooling is performed by winding a cooling unit 32 circulating the coolant around the cover 26.
  • the cooling unit 32 capable of circulating the coolant to the cover 26 is wound around the cover 26.
  • FIG. 17 is a perspective view illustrating the cooling unit 32 used in the cutting method of the present embodiment.
  • Examples of the coolant includes a cooling water.
  • the cooling unit 32 is arranged in contact with the cover 26.
  • the cooling unit 32 is a hose circulating the cooling water.
  • the rotary shaft 21 and the cover 26 are capable of heat conduction via the bearings 25 (refer to FIG. 3).
  • a temperature table indicating a relationship between the temperature of the cooling water and the temperature of the rotary shaft 21 is set in advance to set the temperature of the cooling water to a temperature which does not allow the rotary shaft 21 to be thermally expanded in excess, and the cooling unit 32 is wound around the cover 26. This enables the rotary shaft 21 to be indirectly cooled via the cover 26 and the bearings 25.
  • the cooling unit 32 cools the cover 26 in order for the rotary 21 not to be thermally expanded and the rotary shaft 21 is indirectly cooled. Therefore, it is possible to obtain the optical member F satisfying the required dimensions.
  • the cooling is performed by winding the cooling unit 32 circulating the coolant around the cover 26.
  • the cooling is performed by blowing cooling air to the cover 26 using an air-cooling unit (in the example a blower 33).
  • an air-cooling unit in the example a blower 33.
  • the blower 33 capable of blowing the cooling air to the cover 26 is disposed at the cover 26.
  • the controlling device 7, as the cooling, performs a control for causing the blower 33 to blow the cooling air.
  • FIG. 18 is a perspective view illustrating the blower 33 used in the cutting method of the present embodiment.
  • an outlet of the blower 33 for the cooling air is arranged opposing the rotary shaft 21.
  • the rotary shaft 21 and the cover 26 are capable of heat conduction via the bearings 25 (refer to FIG. 3).
  • a temperature table indicating a relationship between the temperature of the cooling air and the temperature of the rotary shaft 21 is set in advance to set the temperature of the cooling air to a temperature which does not allow the rotary shaft 21 to be thermally expanded in excess, and the blower 33 is used to blow the cooling air to the cover 26. This enables the rotary shaft 21 to be indirectly cooled.
  • the blower 33 cools the cover 26 using the cooling air in order for the rotary 21 not to be thermally expanded and the rotary shaft 21 is indirectly cooled. Therefore, it is possible to obtain the optical member F satisfying the required dimensions.
  • cooling by the cooling unit 32 and cooling by the blower 33 are respectively described as an example of the cooling, but the cooling is not limited thereto.
  • an example of indirectly cooling the rotary shaft 21 has been described as the cooling, but the rotary shaft 21 may be directly cooled.
  • the cooling may be performed in combination with the cooling by the cooling unit 32 and the cooling by the blower 33.
  • the cutting method according to the present embodiment is a cutting method to cut the end surface Wa of the laminated body W, which includes providing the cutting unit 20 having the rotary shaft 21 extending along the normal direction of the end surface Wa of the laminated body W and having the cutting blade 24 protruding toward the end surface Wa side of the laminated body W; rotating the cutting blade 24 around the rotary shaft 21; and cutting the end surface Wa of the laminated body W by bringing the rotating cutting blade 24 into contact with the end surface Wa of the laminated body W; wherein the rotary shaft 21 has been heated in advance up to a saturated condition where the thermal expansion of the rotary shaft 21 no longer occurs.
  • the controlling device 7 performs a control wehre the rotary shaft 21 has been heated in advance up to the saturated condition where the thermal expansion of the rotary shaft 21 no longer occurs, such that the external dimensions of the laminated body W would not be beyond the required allowance defined by the product specification.
  • the heating is performed by allowing an idling rotation of the rotary shaft 21 before performing the cutting process of the laminated body W.
  • a thermal expansion table indicating a relationship between the number of rotations (rotating time) of the rotary shaft 21 and the temperature allowing the saturated condition where the thermal expansion of the rotary shaft 21 no longer occurs is set in advance. As illustrated in FIG. 1, before the moving device 4 moves the laminated body W to the cutting unit 20 in the direction V, the idling rotation of the rotary shaft 21 may be allowed in advance until the saturated condition where the thermal expansion of the rotary shaft 21 no longer occurs.
  • the idling rotation of the rotary shaft 21 is allowed until the saturated condition where the thermal expansion of the rotary shaft 21 no longer occurs. Therefore, it is possible to eliminate the influence due to the thermal expansion of the rotary shaft 21 with respect to the phenomenon where the external dimensions of the optical member are gradually decreased. Consequently, it is possible to obtain the optical member F satisfying the required dimensions.
  • the heating is not limited thereto.
  • the heating may be performed using various methods such as heating the rotary shaft 21 using a heater and the like before performing the cutting process of the laminated body W.
  • the rotary shaft 21 may be directly heated or indirectly heated as the heating.
  • the example of controlling the configuration elements of the cutting apparatus 1 using the controlling device 7 has been described by way of example, but the method is not limited thereto.
  • a cutting method may be adopted where workers use the cutting apparatus 1.
  • the rotary shaft 21 extends along a normal direction of the end surface Wa (refer to FIG. 1) of the laminated body W, but are not limited thereto.
  • the rotary shaft 21 may tilt obliquely against the end surface Wa of the laminated body W. That is, it can be configured to cut obliquely the end surface Wa of the laminated body W by the cutting blade 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Machine Tool Sensing Apparatuses (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

L'invention concerne un procédé de coupe qui permet de couper une extrémité d'une pièce à travailler. Le procédé consiste : à utiliser une unité de coupe (20) ayant un arbre rotatif (21) et une lame de coupe (24) en saillie vers le côté de l'extrémité de la pièce à travailler ; à faire tourner la lame de coupe autour de l'arbre rotatif ; à couper l'extrémité de la pièce à travailler en mettant la lame de coupe rotative en contact avec l'extrémité de celle-ci; à mesurer un paramètre préétabli indiquant un état de surchauffe de l'unité de coupe après l'exécution d'un nombre préétabli de séries d'un processus de coupe ; à régler une position relative entre la lame de coupe et l'extrémité d'une pièce à couper dans une série suivante, avant le lancement du processus de coupe de la série suivante, de façon à ce que les dimensions externes de la pièce, qui doivent être obtenues suivant le processus de coupe de la série suivante, ne dépassent pas une valeur de tolérance requise. Le procédé permet de satisfaire aux dimensions requises d'une pièce à travailler.
PCT/CN2013/000449 2013-04-19 2013-04-19 Procédé et appareil de coupe WO2014169402A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201380075616.9A CN105121074B (zh) 2013-04-19 2013-04-19 切削方法及切削设备
PCT/CN2013/000449 WO2014169402A1 (fr) 2013-04-19 2013-04-19 Procédé et appareil de coupe
KR1020157029654A KR102037564B1 (ko) 2013-04-19 2013-04-19 절삭 가공 방법 및 절삭 가공 장치
JP2015544308A JP6045122B2 (ja) 2013-04-19 2013-04-19 切削加工方法及び切削加工装置、光学部材の製造方法
TW103113642A TWI629151B (zh) 2013-04-19 2014-04-15 切割方法及切割裝置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/000449 WO2014169402A1 (fr) 2013-04-19 2013-04-19 Procédé et appareil de coupe

Publications (1)

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WO2014169402A1 true WO2014169402A1 (fr) 2014-10-23

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JP (1) JP6045122B2 (fr)
KR (1) KR102037564B1 (fr)
CN (1) CN105121074B (fr)
TW (1) TWI629151B (fr)
WO (1) WO2014169402A1 (fr)

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JP2010188505A (ja) * 2009-02-20 2010-09-02 Fuji Mach Mfg Co Ltd 測定装置及びその測定方法並びに切削機械の加工位置補正装置及びその加工位置補正方法
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TWI629151B (zh) 2018-07-11
CN105121074B (zh) 2018-04-27
JP6045122B2 (ja) 2016-12-14
KR102037564B1 (ko) 2019-10-28
CN105121074A (zh) 2015-12-02
TW201501894A (zh) 2015-01-16
JP2015536252A (ja) 2015-12-21
KR20150142690A (ko) 2015-12-22

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