WO2004083140A1 - A pcd temp cutter and processing method - Google Patents

A pcd temp cutter and processing method Download PDF

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Publication number
WO2004083140A1
WO2004083140A1 PCT/KR2004/000574 KR2004000574W WO2004083140A1 WO 2004083140 A1 WO2004083140 A1 WO 2004083140A1 KR 2004000574 W KR2004000574 W KR 2004000574W WO 2004083140 A1 WO2004083140 A1 WO 2004083140A1
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WO
WIPO (PCT)
Prior art keywords
wheel
cutter
edge
cutting wheel
temp
Prior art date
Application number
PCT/KR2004/000574
Other languages
French (fr)
Inventor
Young Il Park
Original Assignee
Shinhandiamond Industrial Co., Ltd
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Filing date
Publication date
Application filed by Shinhandiamond Industrial Co., Ltd filed Critical Shinhandiamond Industrial Co., Ltd
Publication of WO2004083140A1 publication Critical patent/WO2004083140A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B67/00—Sporting games or accessories therefor, not provided for in groups A63B1/00 - A63B65/00
    • A63B67/18—Badminton or similar games with feathered missiles
    • A63B67/183—Feathered missiles
    • A63B67/187—Shuttlecocks
    • A63B67/19—Shuttlecocks with several feathers connected to each other
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/10—Glass-cutting tools, e.g. scoring tools
    • C03B33/105—Details of cutting or scoring means, e.g. tips
    • C03B33/107—Wheel design, e.g. materials, construction, shape
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B67/00—Sporting games or accessories therefor, not provided for in groups A63B1/00 - A63B65/00
    • A63B67/18—Badminton or similar games with feathered missiles
    • A63B67/183—Feathered missiles
    • A63B67/197—Feathered missiles with special functions, e.g. light emission or sound generation
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/22—Luminous paints
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2225/00—Miscellaneous features of sport apparatus, devices or equipment
    • A63B2225/76—Miscellaneous features of sport apparatus, devices or equipment with means enabling use in the dark, other than powered illuminating means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

  • the present invention relates to a PCD TEMP cutter (cone type cutter), whic h is mounted in a cutting apparatus of a holder member for the temp cutter and th en in order to easily cut various workpieces of nonmetal, such as glass and a TFT -LCD, is used to form a scribe line, i.e., a cutoff line, on the workpieces, and a method for processing the same.
  • a PCD TEMP cutter cone type cutter
  • whic h is mounted in a cutting apparatus of a holder member for the temp cutter and th en in order to easily cut various workpieces of nonmetal, such as glass and a TFT -LCD, is used to form a scribe line, i.e., a cutoff line, on the workpieces, and a method for processing the same.
  • a cutting wheel which is mounted in a holder member for a temp cutter, co mprises inclined surfaces at both sides of a scribe line formed on the center of the cutting wheel, wherein a conical surface is integrally formed on the outer side of each inclined surf ace, so that the cutting wheel is formed in a diamond conical shape.
  • Fig. 5 is an exemplary view of a portable nonmetal cutting apparatus 25.
  • the nonmetal cutting apparatus 25 is used to form a straight or curved scribe line on a surface of a workpiece, such as glass and a TFT-LCD, by rotating a cutting wheel 27 at a predetermined speed, wherein the cutting wheel 27 is mounted in the lower end of a head 2 6 and is rotated by a driving means installed in a main body (grip portion) of the cutting ap paratus.
  • the nonmetal cutting apparatus 25 has been used with the conve ntional cutting wheel 27 mounted therein, wherein the cutting wheel 27 is a disc-type curti ng wheel 1 as shown in Figs, la and lb.
  • the conventional disc-type cutting wheel 1 which is di sk-shaped, is formed with a scribe line 3 on the center line of the outer perimeter thereof, w herein edge surfaces 2 are formed with an inclination downward out of both sides of the sc ribe line 3, cutting grooves with a predetermined size, though not concretely shown, are for med on the scribe line 3 at equal intervals, and a mounting hole 4 is formed on the center o f the disc-type cutting wheel 1 therethrough.
  • Such a conventional disc-type cutting wheel 1 is mounted by means of a DC pin (PC D shaft type), which is engaged with an inner diameter of a tool (the cutting wheel) in orde r to rotate and press the tool (the cutting wheel).
  • a DC pin PC D shaft type
  • Such an engaging method using the tool (the cutting wheel) or the pin can lengthen a life of the tool (the cutting wheel) by far as co mpared with a method using a cemented carbide tool (cutting wheel) and shows properties sufficient for requisite to perform a scribing process.
  • the conventional processing method does not solve a problem of wear of c ontact portions caused from axial friction, which is a major cause to shorten a life of a scri be line portion during the processing, and has a limitation of decreasing the outer diameter of the scribe line portion of the tool (the cutting wheel) taking applied pressure and a size o f the inner diameter of the tool (the cutting wheel) into consideration.
  • a lubricationless method has been used by excluding use of liquid or sol id lubrication, causing a life of the tool (the cutting wheel) to be considerably shortened du e to the axial friction, and causing vibration from axial wear to be generated.
  • the conventional inner diameter engaging method has the limitation tha t the outer diameter of the tool (the cutting wheel) of over 1.5mm should be maintained du e to restriction of a shaft portion.
  • the present invention intends to provide a PCD temp cutter and a method for proces sing the same so as to solve the above problems.
  • the diamond co ne-type cutting wheel 10 which comprises edge surfaces 2 at both sides of a scribe line 15 formed on the center of the cutter, wherein a conical surface 11 is integrally formed on the outer side of each edge surface 2.
  • a me thod for manufacturing a PCD temp cutter which comprises steps of vacuum welding a cir cular cylindrical raw material 16 to a cemented carbide auxiliary shank 17, fixing the ceme nted carbide auxiliary shank 17, to which the circular cylindrical raw material 16 is vacuu m welded, to a chuck 18 and rotating it by a rotating means, and machining the conical surf aces 11 and the edge surfaces 2 one by one on the circular cylindrical raw material 16 of th e cemented carbide auxiliary shank 17, which is rotated by the rotating means, by a grindin g wheel or electrode wheel 20, wherein the grinding wheel or electrode wheel turns or line arly reciprocates or is actuated at a predetermined angle, and rotates for grinding or electric discharge.
  • a PCD temp cutter of the present invention for achieving the above objects, compris es; edge surfaces (2) at both sides of a scribe line (15) formed on the center of the cutter; a nd conical surfaces (11), each of which is integrally formed on the outer side of each edge surface (2), and the apexes of which are axis supporting centers (12), wherein the cutting w heel is formed as a diamond cone-type cutting wheel (10).
  • a center supporting portio n gable angle ⁇ 2 of the conical surfaces (11) at the axis supporting centers (12) is 60 ⁇ 130 degrees
  • an edge portion gable angle ⁇ l consisting of both edge surfaces (14) is 80 ⁇ 1 40 degrees.
  • a length Ll between both ends oft he axis supporting centers (12) is 2.0 - 18 mm, and an edge width L2, i.e. a length of both edge surfaces (2) is 0.3 ⁇ 6.0mm.
  • an edge portion outer diameter Dl of the circumfere nee of the scribe line (15) is 1.0 ⁇ 5.0mm.
  • a method for processing a PCD temp cutter comprising steps of: vacuum weldi ng a circular cylindrical raw material (16) to a cemented carbide auxiliary shank (17); fixin g the cemented carbide auxiliary shank (17), to which the circular cylindrical raw material (16) is vacuum welded, to a chuck (18) and rotating it by a rotating means; and machining conical surfaces (11) and edge surfaces (2) one by one on the circular cylindrical raw mate rial (16) of the cemented carbide auxiliary shank (17), which is rotated by the rotating mea ns, by a grinding wheel (20), which turns and is actuated upward and downward with an in clination by means of a rotating and upward and downward actuating means.
  • the circular cylindrical raw material (16) which is va cuum welded to the cemented carbide auxiliary shank (17), has an outer diameter D2 of 1.5 ⁇ 12 mm and a length L3 of 3.0 ⁇ 22 mm.
  • the chuck (18) for gripping the cemented carbide auxiliary shank (17), to which the circular cylindrical raw material (16) is vacuum welded comprises eithe r a pneumatic chuck or a hydraulic chuck.
  • the conical surfaces (11) are subject to an electric discharge machini ng by an edge electrode wheel, and the edge surfaces (2) of a scribe line (15) are ground by a vitrified wheel.
  • a vitrified wheel of the grinding wheel (20) for grin ding the edge surfaces (2) is a cup shaped vitrified wheel with diamond mesh of 600 ⁇ 3,00 0 and a concentration of 100 ⁇ 150.
  • Figs, la and lb are a front view and a side view of a conventional disc-type cutting wheel.
  • Figs. 2a and 2b are a front view and a side view of a diamond cone-type cutting whe el according to the present invention.
  • Figs. 3 a and 3b are exemplary views showing a process for machining the diamond c one-type cutting wheel according to the present invention.
  • Fig. 4 is an exemplary view showing a state that the diamond cone-type cutting whee 1 according to the present invention is mounted in a holder member.
  • Fig. 5 is an exemplary view of a conventional portable glass cutting apparatus.
  • Figs. 2a to 4 of the accompanying drawings are exemplary views showing concrete e xamples embodying a diamond cone-type cutting wheel 10 and a scribing process accordin g to the present invention:
  • Figs. 2a and 2b are a front view and a side view of the diamond cone-type cutting wheel 10 according to the present invention;
  • Figs. 3a and 3b are exempla ry views showing a process for machining the diamond cone-type cutting wheel 10 accordi ng to the present invention;
  • Fig. 4 is an exemplary view showing a state that the diamo nd cone-type cutting wheel 10 according to the present invention is mounted in a holder m ember.
  • the diamond cone-type cutting wheel 10 which is formed as described above, is ma nufactured by the process as shown in Figs. 3a and 3b.
  • the manufacturing process is perf ormed by steps of vacuum welding a circular cylindrical raw material 16 to a cemented car bide auxiliary shank 17, fixing the cemented carbide auxiliary shank 17, to which the circu lar cylindrical raw material 16 is vacuum welded, to a chuck 18 and rotating it by a rotatin g means, and machining the conical surfaces 11 and the edge surfaces 2 one by one on the circular cylindrical raw material 16 of the cemented carbide auxiliary shank 17, which is ro tated by the rotating means, by a grinding wheel or electrode wheel 20, wherein the grindin g wheel or electrode wheel 20 turns or linearly reciprocates or is actuated at a predetermine d angle and rotates for grinding or electric discharge.
  • the circular cylindrical raw material 16 which has an outer di ameter D2 of 1.5 ⁇ 12mm and a length L3 of 3.0 ⁇ 22mm before the machining process is performed, is integrally welded to the cemented carbide auxiliary shank 17 by a conventio nal vacuum welding method.
  • the cemented carbide auxiliary shank 17, to which the circular c ylindrical raw material 16 is vacuum welded, to a chuck 18 and rotating it by a rotating me ans the cemented carbide auxiliary shank 17, to which the circular cylindrical raw material 16 is vacuum welded, is firmly gripped by a conventional chuck 18 using pneumatic or h ydraulic pressure. Then, the chuck 18 gripping the cemented carbide auxiliary shank 17 i s mounted to the conventional rotating means (concretely not shown) with the chuck 18 ha ving concentricity with respect to the central axis line of the cemented carbide auxiliary sh ank 17.
  • the rotating means rotates the chuck 18 and therefore the cemented carbide auxil iary shank 17, to which the circular cylindrical raw material 16 is vacuum welded.
  • the circular cylindrical raw material 16, which is rotated at a predetermined speed b y the rotating means, is machined by the electrode wheel, which turns or linearly reciprocat es or is actuated at a predetermined angle and rotates for grinding or electric discharge.
  • the machining of the circular cylindrical raw material 16 is performed in the order of el ectric discharge machining of the center portion 11 of the opposite side of the cemented car bide auxiliary shank using the electrode wheel 20, machining of the edge surfaces 2 using t he electrode wheel and the grinding wheel, and electric discharge machining of the center portion 11 of the side of the cemented carbide auxiliary shank.
  • the electric discharge ma chining of the conical surface of the side of the cemented carbide auxiliary shank separates the diamond cone-type cutting wheel 10 of the present invention from the cemented carbi de auxiliary shank of itself.
  • the edge surfaces 2 are f ormed by grinding and removing grinding removal portions 13 by means of the grinding w heel 20.
  • an angle between both edge sur faces 2 with the grinding removal portions 13 removed i.e., an edge portion gable angle ⁇ l maintains 80 ⁇ 140 degrees
  • an edge portion outer diameter Dl of the circumference of the scribe line 15 with the grinding removal portions 13 removed maintains 1.0 ⁇ 5.0m m.
  • the edge surfaces 2 of the edge line portions are ground by using the grinding wheel 20, such as a vitrified wheel for grinding, which is manufactured in a cup shape with a diamond mesh of 600 ⁇ 3,000 and a concentration of 100 ⁇ 150, which is designed acco rding to a kind of a raw material.
  • the grinding wheel 20 such as a vitrified wheel for grinding, which is manufactured in a cup shape with a diamond mesh of 600 ⁇ 3,000 and a concentration of 100 ⁇ 150, which is designed acco rding to a kind of a raw material.
  • a center supporting port ion gable angle 02 at axis supporting centers 12 maintains 60 ⁇ 130 degrees and a length b etween both ends of the axis supporting centers 12, i.e., a length Ll of the diamond cone-ty pe cutting wheel 10 maintains 2.0 ⁇ 18mm.
  • Embodiment 1 The circular cylindrical raw material 16 having the outer diameter D2 of 3.0mm and the length L3 of 3.6mm before the machining process is performed, is integrally welded to the cemented carbide auxiliary shank 17 by a conventional vacuum welding method.
  • the cemented carbide auxiliary shank 17, to which the circular cylindrical raw material 16 is vacuum welded, is mounted and fixed to the chuck 18, which is rotated by a rotating means and actuated by hydraulic pressure.
  • the grinding wheel or E.D.G electrod e wheel 20, which linearly moves for transfer at a predetermined grinding angle or electric discharge angle, is mounted.
  • the electric discharge and grinding machining is performed by using the E.D.G electrode wheel and grinding wheel 2 0, wherein the edge portion outer diameter Dl of the circumference of the scribe line 15 is formed in 2.5mm, the edge width L2, i.e., the length of both edge surfaces 14 is formed in 0.57mm, and the center supporting portion gable angle 02 of the conical surfaces 11 at the axis supporting centers 12 maintains 100 degrees.
  • the grinding wheel 20 such as a cup-shaped vi trifled wheel with a diamond mesh of 1,500 and a concentration of 120, is mounted.
  • both conical surfaces 11 are formed by grinding, wherein the length Ll between both en ds of the axis supporting centers 12 maintains 2.42mm, and the edge portion gable angle 0 1 between both edge surfaces 2 maintains 125 degrees, so that the diamond cone-type cutti ng wheel 10 is completed.
  • the diamond cone-type cutting wheel 10 formed as above is mounted in a holder me mber 21 of the nonmetal cutting apparatus 25 by using cutting wheel holders 23 and engagi ng a bolt for adjusting a gap (not concretely shown) into an engaging hole 22.
  • the scribing process is performed under the condition that while t he workpiece 24 of 0.7mm in a thickness is held by means of a vacuum holder (not concret ely shown), a cutting pressure of 6 ⁇ 30 m/min is maintained according to the specific oute r diameter of the edge line portion and a scribing load of 1.0 ⁇ 20kgf is maintained.
  • the scribing process is performed with the load of 3.0kgf and the cu tting pressure (scribing rate) of 300mm/sec maintained.
  • the PCD temp cutter manufactured by the method according to the present inventio n as described above comprises the edge surfaces at both sides of the scribe line formed on the center of the cutter, wherein the conical surface is integrally formed on the outer side o f each edge surface, so that the cutting wheel is formed as a diamond cone-type cutting wh eel.
  • a pressure per unit area of the edge portion wherein the pressure is transmitted to the workpiece, can be increased so that vertical deeper cracks are obtained when the ou ter diameter of the scribe line is reduced and the same cutting pressure is applied.
  • horizontal cracks on the workpiece are minimi zed and vertical deep cracks can be easily generated with small pressure.
  • the work piece can be broken completely without a continuous or noncontinuous piece (chipping) ge nerated when the workpiece is cut.
  • the apexes of the conical surfaces formed on both sides are engaged by using the holders, wear of an axis and vibration of a t ool can be prevented, and a life of the tool can be also lengthened.
  • the edge line portions are subject to the grin ding process by means of the grinding wheel and the center portions are subject to the edge process by means of the electrode wheel for electric discharge. Therefore, a concentricit y and tolerance of a dimension and an angle can be precisely processed, workability and pr oductivity can be improved, and the diamond cone-type cutting wheel can be processed wit h an optimal state maintained according to the raw material.

Abstract

The present invention relates to the PCD temp cutter which comprises the edge surfaces at both sides of the scribe line formed on the center of the cutter, wherein the conical s surface is integrally formed on the outer side of each edge surface, so that the cutting wheel is formed as a diamond cone-type cutting wheel, and a method for manufacturing the same. A pressure per unit area of the edge portion, wherein the pressure is transmitted to the workpiece, can be increased so that vertical deeper cracks are obtained when the outer diameter of the scribe line is reduced and the same cutting pressure is applied. Therefore, when the scribing process is performed, horizontal cracks on the workpiece are minimized and vertical deep cracks can be easily generated with small pressure. Thus, the workpiece can be broken completely without a continuous or noncontinuous piece (chipping) generated when the workpiece is cut. In particular, since the apexes of the conical surfaces formed on both sides are engaged by using the holders, wear of an axis and vibration of a tool can be prevented, and a life of the tool can be also lengthened. In addition, a concentricity and tolerance of a dimension and an angle can be precisely processed, workability and productivity can be improved, and the diamond cone-type cutting wheel can be processed with an optimal state maintained according to the raw material.

Description

A PCD TEMP CUTTER AND PROCESSING METHOD
Technical Field The present invention relates to a PCD TEMP cutter (cone type cutter), whic h is mounted in a cutting apparatus of a holder member for the temp cutter and th en in order to easily cut various workpieces of nonmetal, such as glass and a TFT -LCD, is used to form a scribe line, i.e., a cutoff line, on the workpieces, and a method for processing the same. In detail, a cutting wheel, which is mounted in a holder member for a temp cutter, co mprises inclined surfaces at both sides of a scribe line formed on the center of the cutting wheel, wherein a conical surface is integrally formed on the outer side of each inclined surf ace, so that the cutting wheel is formed in a diamond conical shape.
Background Art
Fig. 5 is an exemplary view of a portable nonmetal cutting apparatus 25. The nonmetal cutting apparatus 25 is used to form a straight or curved scribe line on a surface of a workpiece, such as glass and a TFT-LCD, by rotating a cutting wheel 27 at a predetermined speed, wherein the cutting wheel 27 is mounted in the lower end of a head 2 6 and is rotated by a driving means installed in a main body (grip portion) of the cutting ap paratus.
As described above, the nonmetal cutting apparatus 25 has been used with the conve ntional cutting wheel 27 mounted therein, wherein the cutting wheel 27 is a disc-type curti ng wheel 1 as shown in Figs, la and lb. As shown in Figs, la and lb, the conventional disc-type cutting wheel 1, which is di sk-shaped, is formed with a scribe line 3 on the center line of the outer perimeter thereof, w herein edge surfaces 2 are formed with an inclination downward out of both sides of the sc ribe line 3, cutting grooves with a predetermined size, though not concretely shown, are for med on the scribe line 3 at equal intervals, and a mounting hole 4 is formed on the center o f the disc-type cutting wheel 1 therethrough. Such a conventional disc-type cutting wheel 1 is mounted by means of a DC pin (PC D shaft type), which is engaged with an inner diameter of a tool (the cutting wheel) in orde r to rotate and press the tool (the cutting wheel). Such an engaging method using the tool (the cutting wheel) or the pin can lengthen a life of the tool (the cutting wheel) by far as co mpared with a method using a cemented carbide tool (cutting wheel) and shows properties sufficient for requisite to perform a scribing process.
However, the conventional processing method does not solve a problem of wear of c ontact portions caused from axial friction, which is a major cause to shorten a life of a scri be line portion during the processing, and has a limitation of decreasing the outer diameter of the scribe line portion of the tool (the cutting wheel) taking applied pressure and a size o f the inner diameter of the tool (the cutting wheel) into consideration. In order not to gen erate contaminant, a lubricationless method has been used by excluding use of liquid or sol id lubrication, causing a life of the tool (the cutting wheel) to be considerably shortened du e to the axial friction, and causing vibration from axial wear to be generated. In particular, the conventional inner diameter engaging method has the limitation tha t the outer diameter of the tool (the cutting wheel) of over 1.5mm should be maintained du e to restriction of a shaft portion.
Disclosure of Invention The present invention intends to provide a PCD temp cutter and a method for proces sing the same so as to solve the above problems.
It is an object of the present invention to provide a PCD temp cutter, which comprise s edge surfaces at both sides of a scribe line formed on the center of the cutter, wherein a c onical surface is integrally formed on the outer side of each edge surface, so that the cuttin g wheel is formed in a diamond conical shape.
It is an object of the present invention to provide a method for manufacturing a PCD temp cutter, which comprises steps of vacuum welding a circular cylindrical raw material ( PCD) to a cemented carbide auxiliary shank, fixing the cemented carbide auxiliary shank, t o which the raw material is vacuum welded, to a chuck and rotating it by a rotating means, and machining the center portions and the inclined edge line portions one by one on the ra w material of the cemented carbide auxiliary shank, which is rotated by the rotating means, by a grinding wheel (or electrode wheel), wherein the grinding wheel (or electrode wheel) turns or linearly reciprocates or is actuated at a predetermined angle, and rotates for grind ing or electric discharge. It is another object of the present invention to provide a PCD temp cutter, which in t he scribing process, causes horizontal cracks on the workpiece to be minimized, vertical de ep cracks with small pressure to be generated, when the workpiece is cut, the workpiece to be broken completely without a continuous or noncontinuous piece (chipping) generated, a nd a pressure per unit area of the scribe line portion transmitted to the workpiece to be incr eased so as to obtain vertical deeper cracks when the outer diameter of the scribe line is red uced and the same cutting pressure is applied.
It is an additional object of the present invention to provide a PCD temp cutter, whic h prevents wear of an axis and vibration of a tool by enable the apexes of the conical surfac es formed on both sides to be engaged by holders, can rotate the tool smoothly, and can als o lengthen a life of the tool.
It is another object of the present invention to provide a PCD temp cutter, wherein w hen the scribe line portions and the center portions are processed, the edge line portions are subject to a grinding process by means of a grinding wheel and the center portions are sub ject to an E.D.G. process by means of an electrode wheel for electric discharge, so that a co ncentricity and a tolerance of a dimension and an angle can be precisely processed, workab ility and productivity can be improved, and the PCD temp cutter can be processed with an optimal state maintained according to a raw material.
The above and other objects of the present invention are achieved by the diamond co ne-type cutting wheel 10, which comprises edge surfaces 2 at both sides of a scribe line 15 formed on the center of the cutter, wherein a conical surface 11 is integrally formed on the outer side of each edge surface 2.
The additional above and other objects of the present invention are achieved by a me thod for manufacturing a PCD temp cutter, which comprises steps of vacuum welding a cir cular cylindrical raw material 16 to a cemented carbide auxiliary shank 17, fixing the ceme nted carbide auxiliary shank 17, to which the circular cylindrical raw material 16 is vacuu m welded, to a chuck 18 and rotating it by a rotating means, and machining the conical surf aces 11 and the edge surfaces 2 one by one on the circular cylindrical raw material 16 of th e cemented carbide auxiliary shank 17, which is rotated by the rotating means, by a grindin g wheel or electrode wheel 20, wherein the grinding wheel or electrode wheel turns or line arly reciprocates or is actuated at a predetermined angle, and rotates for grinding or electric discharge.
A PCD temp cutter of the present invention for achieving the above objects, compris es; edge surfaces (2) at both sides of a scribe line (15) formed on the center of the cutter; a nd conical surfaces (11), each of which is integrally formed on the outer side of each edge surface (2), and the apexes of which are axis supporting centers (12), wherein the cutting w heel is formed as a diamond cone-type cutting wheel (10).
Specifically, in the diamond cone-type cutting wheel (10), a center supporting portio n gable angle Θ2 of the conical surfaces (11) at the axis supporting centers (12) is 60 ~ 130 degrees, and an edge portion gable angle θl consisting of both edge surfaces (14) is 80 ~ 1 40 degrees.
Still in the diamond cone-type cutting wheel (10), a length Ll between both ends oft he axis supporting centers (12) is 2.0 - 18 mm, and an edge width L2, i.e. a length of both edge surfaces (2) is 0.3 ~ 6.0mm. And an edge portion outer diameter Dl of the circumfere nee of the scribe line (15) is 1.0 ~ 5.0mm. According to another aspect of the present invention for achieving the objects, there i s provided a method for processing a PCD temp cutter, comprising steps of: vacuum weldi ng a circular cylindrical raw material (16) to a cemented carbide auxiliary shank (17); fixin g the cemented carbide auxiliary shank (17), to which the circular cylindrical raw material (16) is vacuum welded, to a chuck (18) and rotating it by a rotating means; and machining conical surfaces (11) and edge surfaces (2) one by one on the circular cylindrical raw mate rial (16) of the cemented carbide auxiliary shank (17), which is rotated by the rotating mea ns, by a grinding wheel (20), which turns and is actuated upward and downward with an in clination by means of a rotating and upward and downward actuating means.
More concretely in the method, the circular cylindrical raw material (16), which is va cuum welded to the cemented carbide auxiliary shank (17), has an outer diameter D2 of 1.5 ~ 12 mm and a length L3 of 3.0 ~ 22 mm.
Still in the method, the chuck (18) for gripping the cemented carbide auxiliary shank (17), to which the circular cylindrical raw material (16) is vacuum welded, comprises eithe r a pneumatic chuck or a hydraulic chuck. And in processing the conical surfaces (11) and the edge surfaces (2), the conical surfaces (11) are subject to an electric discharge machini ng by an edge electrode wheel, and the edge surfaces (2) of a scribe line (15) are ground by a vitrified wheel. And in the method, a vitrified wheel of the grinding wheel (20) for grin ding the edge surfaces (2) is a cup shaped vitrified wheel with diamond mesh of 600 ~ 3,00 0 and a concentration of 100 ~ 150.
Brief Description of Drawings
Figs, la and lb are a front view and a side view of a conventional disc-type cutting wheel.
Figs. 2a and 2b are a front view and a side view of a diamond cone-type cutting whe el according to the present invention.
Figs. 3 a and 3b are exemplary views showing a process for machining the diamond c one-type cutting wheel according to the present invention.
Fig. 4 is an exemplary view showing a state that the diamond cone-type cutting whee 1 according to the present invention is mounted in a holder member. Fig. 5 is an exemplary view of a conventional portable glass cutting apparatus.
Best Mode for Carrying Out the Invention
The above and other objects and features of the present invention can be more clearl y understood from the descriptions below with reference to the accompanying drawings. Figs. 2a to 4 of the accompanying drawings are exemplary views showing concrete e xamples embodying a diamond cone-type cutting wheel 10 and a scribing process accordin g to the present invention: Figs. 2a and 2b are a front view and a side view of the diamond cone-type cutting wheel 10 according to the present invention; Figs. 3a and 3b are exempla ry views showing a process for machining the diamond cone-type cutting wheel 10 accordi ng to the present invention; and Fig. 4 is an exemplary view showing a state that the diamo nd cone-type cutting wheel 10 according to the present invention is mounted in a holder m ember.
As shown in Figs. 2a and 2b, the diamond cone-type cutting wheel 10 according to t he present invention comprises edge surfaces 2 at both sides of a scribe line 15 formed on t he center of the cutter, wherein a conical surface 11 is integrally formed on the outer side o f each edge surface 2, so that the cutting wheel is formed in a diamond conical shape.
The diamond cone-type cutting wheel 10, which is formed as described above, is ma nufactured by the process as shown in Figs. 3a and 3b. The manufacturing process is perf ormed by steps of vacuum welding a circular cylindrical raw material 16 to a cemented car bide auxiliary shank 17, fixing the cemented carbide auxiliary shank 17, to which the circu lar cylindrical raw material 16 is vacuum welded, to a chuck 18 and rotating it by a rotatin g means, and machining the conical surfaces 11 and the edge surfaces 2 one by one on the circular cylindrical raw material 16 of the cemented carbide auxiliary shank 17, which is ro tated by the rotating means, by a grinding wheel or electrode wheel 20, wherein the grindin g wheel or electrode wheel 20 turns or linearly reciprocates or is actuated at a predetermine d angle and rotates for grinding or electric discharge.
In the step of vacuum welding the circular cylindrical raw material 16 to the cemente d carbide auxiliary shank 17, the circular cylindrical raw material 16, which has an outer di ameter D2 of 1.5 ~ 12mm and a length L3 of 3.0 ~ 22mm before the machining process is performed, is integrally welded to the cemented carbide auxiliary shank 17 by a conventio nal vacuum welding method.
In the step of fixing the cemented carbide auxiliary shank 17, to which the circular c ylindrical raw material 16 is vacuum welded, to a chuck 18 and rotating it by a rotating me ans, the cemented carbide auxiliary shank 17, to which the circular cylindrical raw material 16 is vacuum welded, is firmly gripped by a conventional chuck 18 using pneumatic or h ydraulic pressure. Then, the chuck 18 gripping the cemented carbide auxiliary shank 17 i s mounted to the conventional rotating means (concretely not shown) with the chuck 18 ha ving concentricity with respect to the central axis line of the cemented carbide auxiliary sh ank 17. The rotating means rotates the chuck 18 and therefore the cemented carbide auxil iary shank 17, to which the circular cylindrical raw material 16 is vacuum welded. The circular cylindrical raw material 16, which is rotated at a predetermined speed b y the rotating means, is machined by the electrode wheel, which turns or linearly reciprocat es or is actuated at a predetermined angle and rotates for grinding or electric discharge. A lso, the machining of the circular cylindrical raw material 16 is performed in the order of el ectric discharge machining of the center portion 11 of the opposite side of the cemented car bide auxiliary shank using the electrode wheel 20, machining of the edge surfaces 2 using t he electrode wheel and the grinding wheel, and electric discharge machining of the center portion 11 of the side of the cemented carbide auxiliary shank. The electric discharge ma chining of the conical surface of the side of the cemented carbide auxiliary shank separates the diamond cone-type cutting wheel 10 of the present invention from the cemented carbi de auxiliary shank of itself.
Also, in order to form the scribe line 15 as described above, the edge surfaces 2 are f ormed by grinding and removing grinding removal portions 13 by means of the grinding w heel 20. When a rough cutting process is formerly performed by using an E.D.G electrod e wheel, it is preferable that a length of both edge surfaces 2 formed on both sides of the sc ribe line 15, i.e., an edge width L2 maintains 0.3 ~ 6.0mm, an angle between both edge sur faces 2 with the grinding removal portions 13 removed, i.e., an edge portion gable angle θl maintains 80 ~ 140 degrees, and an edge portion outer diameter Dl of the circumference of the scribe line 15 with the grinding removal portions 13 removed maintains 1.0 ~ 5.0m m.
Also, the edge surfaces 2 of the edge line portions are ground by using the grinding wheel 20, such as a vitrified wheel for grinding, which is manufactured in a cup shape with a diamond mesh of 600 ~ 3,000 and a concentration of 100 ~ 150, which is designed acco rding to a kind of a raw material. In addition, it is preferable that a center supporting port ion gable angle 02 at axis supporting centers 12 maintains 60 ~ 130 degrees and a length b etween both ends of the axis supporting centers 12, i.e., a length Ll of the diamond cone-ty pe cutting wheel 10 maintains 2.0 ~ 18mm.
The diamond cone-type cutting wheel 10 according to the present invention will be more clearly understood from the following embodiment. Embodiment The circular cylindrical raw material 16 having the outer diameter D2 of 3.0mm and the length L3 of 3.6mm before the machining process is performed, is integrally welded to the cemented carbide auxiliary shank 17 by a conventional vacuum welding method.
Then, the cemented carbide auxiliary shank 17, to which the circular cylindrical raw material 16 is vacuum welded, is mounted and fixed to the chuck 18, which is rotated by a rotating means and actuated by hydraulic pressure. The grinding wheel or E.D.G electrod e wheel 20, which linearly moves for transfer at a predetermined grinding angle or electric discharge angle, is mounted.
Next, while the circular cylindrical raw material 16 together with the cemented carbi de auxiliary shank 17 mounted and fixed to the chuck 18 rotate, the electric discharge and grinding machining is performed by using the E.D.G electrode wheel and grinding wheel 2 0, wherein the edge portion outer diameter Dl of the circumference of the scribe line 15 is formed in 2.5mm, the edge width L2, i.e., the length of both edge surfaces 14 is formed in 0.57mm, and the center supporting portion gable angle 02 of the conical surfaces 11 at the axis supporting centers 12 maintains 100 degrees.
After the edge surfaces 2 are completely formed in order to maintain the scribe line 1 5 on the center line of the cutting wheel 10, the grinding wheel 20, such as a cup-shaped vi trifled wheel with a diamond mesh of 1,500 and a concentration of 120, is mounted. The n, both conical surfaces 11 are formed by grinding, wherein the length Ll between both en ds of the axis supporting centers 12 maintains 2.42mm, and the edge portion gable angle 0 1 between both edge surfaces 2 maintains 125 degrees, so that the diamond cone-type cutti ng wheel 10 is completed.
The diamond cone-type cutting wheel 10 formed as above is mounted in a holder me mber 21 of the nonmetal cutting apparatus 25 by using cutting wheel holders 23 and engagi ng a bolt for adjusting a gap (not concretely shown) into an engaging hole 22.
With the diamond cone-type cutting wheel 10 mounted in the holder member 21 of t he nonmetal cutting apparatus 25, a workpiece 24 is scribed.
Also, it is preferable to perform the scribing process under the condition that while t he workpiece 24 of 0.7mm in a thickness is held by means of a vacuum holder (not concret ely shown), a cutting pressure of 6 ~ 30 m/min is maintained according to the specific oute r diameter of the edge line portion and a scribing load of 1.0 ~ 20kgf is maintained. In th e present embodiment, the scribing process is performed with the load of 3.0kgf and the cu tting pressure (scribing rate) of 300mm/sec maintained.
In comparison with a result of a scribing process using the disc-type cutting wheel 1 by axis engaging method maintaining the same outer diameter, as a result of the present scr ibing process, vertical cracks having a depth of over two times are generated without a hori zontal crack, so that the workpiece 24 can be easily separated and cut. Furthermore, it is confirmed that a life of the tool can be lengthened over ten times more.
Industrial Applicability
The PCD temp cutter manufactured by the method according to the present inventio n as described above comprises the edge surfaces at both sides of the scribe line formed on the center of the cutter, wherein the conical surface is integrally formed on the outer side o f each edge surface, so that the cutting wheel is formed as a diamond cone-type cutting wh eel. Thus, a pressure per unit area of the edge portion, wherein the pressure is transmitted to the workpiece, can be increased so that vertical deeper cracks are obtained when the ou ter diameter of the scribe line is reduced and the same cutting pressure is applied. Theref ore, when the scribing process is performed, horizontal cracks on the workpiece are minimi zed and vertical deep cracks can be easily generated with small pressure. Thus, the work piece can be broken completely without a continuous or noncontinuous piece (chipping) ge nerated when the workpiece is cut. In particular, since the apexes of the conical surfaces formed on both sides are engaged by using the holders, wear of an axis and vibration of a t ool can be prevented, and a life of the tool can be also lengthened. In addition, when the diamond cone-type cutting wheel is processed, the edge line portions are subject to the grin ding process by means of the grinding wheel and the center portions are subject to the edge process by means of the electrode wheel for electric discharge. Therefore, a concentricit y and tolerance of a dimension and an angle can be precisely processed, workability and pr oductivity can be improved, and the diamond cone-type cutting wheel can be processed wit h an optimal state maintained according to the raw material.

Claims

1. A PCD temp cutter, comprising: edge surfaces (2) at both sides of a scribe line (15) formed on the center of the cutter ; and conical surfaces (11), each of which is integrally formed on the outer side of each ed ge surface (2), and the apexes of which are axis supporting centers (12), wherein the cutting wheel is formed as a diamond cone-type cutting wheel (10).
2.
A PCD temp cutter as defined in claim 1, wherein in the diamond cone-type cutting wheel (10), a center supporting portion gable angle 02 of the conical surfaces (11) at the a xis supporting centers (12) is 60 ~ 130 degrees, and an edge portion gable angle θl consisti ng of both edge surfaces (14) is 80 ~ 140 degrees.
3.
A PCD temp cutter as defined in claim 1, wherein in the diamond cone-type cutting wheel (10), a length Ll between both ends of the axis supporting centers (12) is 2.0 ~ 18 mm, and an edge width L2, i.e. a length of both edge surfaces (2) is 0.3 ~ 6.0mm.
4.
A PCD temp cutter as defined in claim 1, wherein in the diamond cone-type cutting wheel (10), an edge portion outer diameter Dl of the circumference of the scribe line (15) is 1.0 - 5.0mm.
5. A method for processing a PCD temp cutter, comprising steps of: vacuum welding a circular cylindrical raw material (16) to a cemented carbide auxili ary shank (17); fixing the cemented carbide auxiliary shank (17), to which the circular cylindrical ra w material (16) is vacuum welded, to a chuck (18) and rotating it by a rotating means; and machining conical surfaces (11) and edge surfaces (2) one by one on the circular cyli ndrical raw material (16) of the cemented carbide auxiliary shank (17), which is rotated by the rotating means, by a grinding wheel (20), which turns and is actuated upward and down ward with an inclination by means of a rotating and upward and downward actuating mean s.
6.
The method as defined in claim 5, wherein the circular cylindrical raw material (16 ), which is vacuum welded to the cemented carbide auxiliary shank (17), has an outer diam eter D2 of 1.5 - 12 mm and a length L3 of 3.0 - 22 mm.
7.
The method as defined in claim 5, wherein the chuck (18) for gripping the cemente d carbide auxiliary shank (17), to which the circular cylindrical raw material (16) is vacuu m welded, comprises either a pneumatic chuck or a hydraulic chuck.
8.
The method as defined in claim 5, wherein in processing the conical surfaces (11) a nd the edge surfaces (2), the conical surfaces (11) are subject to an electric discharge mach ining by an edge electrode wheel, and the edge surfaces (2) of a scribe line (15) are ground by a vitrified wheel.
9.
The method as defined in claim 5, wherein a vitrified wheel of the grinding wheel ( 20) for grinding the edge surfaces (2) is a cup shaped vitrified wheel with diamond mesh o f 600 - 3,000 and a concentration of 100 - 150.
PCT/KR2004/000574 2003-03-17 2004-03-17 A pcd temp cutter and processing method WO2004083140A1 (en)

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KR10-2003-0016462 2003-03-17

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
US7308846B2 (en) * 2003-04-29 2007-12-18 Lg.Philips Lcd Co., Ltd. Apparatus for cutting liquid crystal display panel
CN102049813A (en) * 2009-10-29 2011-05-11 三星钻石工业股份有限公司 Scribing wheel and method for manufacturing the same
CN102617029A (en) * 2011-01-27 2012-08-01 三星钻石工业股份有限公司 A method for scribing a brittle material substrate
CN104402209A (en) * 2014-10-31 2015-03-11 北京沃尔德超硬工具有限公司 Integral tapered knife flywheel
CN104445906A (en) * 2014-10-31 2015-03-25 北京沃尔德超硬工具有限公司 Integrated diamond cutter wheel
EP2851172A1 (en) * 2004-02-02 2015-03-25 Mitsuboshi Diamond Industrial Co., Ltd. Cutter wheel and method for manufacturing the cutter wheel
CN104529143A (en) * 2010-10-08 2015-04-22 三星钻石工业股份有限公司 Scribing wheel and method of manufacturing the same

Families Citing this family (1)

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JP5276547B2 (en) 2009-07-31 2013-08-28 三星ダイヤモンド工業株式会社 Cutter wheel

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US5351772A (en) * 1993-02-10 1994-10-04 Baker Hughes, Incorporated Polycrystalline diamond cutting element
JP2001158633A (en) * 1999-12-02 2001-06-12 Toray Ind Inc Method for scribing
KR20020024246A (en) * 2002-02-04 2002-03-29 정선환 Glass cuttihg device used vibrater
JP2003306339A (en) * 2002-04-12 2003-10-28 Nec Kagoshima Ltd Scribing apparatus

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Publication number Priority date Publication date Assignee Title
JPS56130944A (en) * 1980-03-17 1981-10-14 Nec Home Electronics Ltd Diamond cutter
US5351772A (en) * 1993-02-10 1994-10-04 Baker Hughes, Incorporated Polycrystalline diamond cutting element
JP2001158633A (en) * 1999-12-02 2001-06-12 Toray Ind Inc Method for scribing
KR20020024246A (en) * 2002-02-04 2002-03-29 정선환 Glass cuttihg device used vibrater
JP2003306339A (en) * 2002-04-12 2003-10-28 Nec Kagoshima Ltd Scribing apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7308846B2 (en) * 2003-04-29 2007-12-18 Lg.Philips Lcd Co., Ltd. Apparatus for cutting liquid crystal display panel
EP2851172A1 (en) * 2004-02-02 2015-03-25 Mitsuboshi Diamond Industrial Co., Ltd. Cutter wheel and method for manufacturing the cutter wheel
CN102049813A (en) * 2009-10-29 2011-05-11 三星钻石工业股份有限公司 Scribing wheel and method for manufacturing the same
CN104529143A (en) * 2010-10-08 2015-04-22 三星钻石工业股份有限公司 Scribing wheel and method of manufacturing the same
CN102617029A (en) * 2011-01-27 2012-08-01 三星钻石工业股份有限公司 A method for scribing a brittle material substrate
CN102617029B (en) * 2011-01-27 2014-10-08 三星钻石工业股份有限公司 A method for scribing a brittle material substrate
TWI468356B (en) * 2011-01-27 2015-01-11 Mitsuboshi Diamond Ind Co Ltd Scoring method of brittle material substrate
CN104402209A (en) * 2014-10-31 2015-03-11 北京沃尔德超硬工具有限公司 Integral tapered knife flywheel
CN104445906A (en) * 2014-10-31 2015-03-25 北京沃尔德超硬工具有限公司 Integrated diamond cutter wheel

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