WO2023176819A1 - 超硬合金製切断刃 - Google Patents

超硬合金製切断刃 Download PDF

Info

Publication number
WO2023176819A1
WO2023176819A1 PCT/JP2023/009816 JP2023009816W WO2023176819A1 WO 2023176819 A1 WO2023176819 A1 WO 2023176819A1 JP 2023009816 W JP2023009816 W JP 2023009816W WO 2023176819 A1 WO2023176819 A1 WO 2023176819A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
blade
cemented carbide
cutting blade
less
Prior art date
Application number
PCT/JP2023/009816
Other languages
English (en)
French (fr)
Japanese (ja)
Other versions
WO2023176819A9 (ja
Inventor
篤史 小林
Original Assignee
株式会社アライドマテリアル
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 株式会社アライドマテリアル filed Critical 株式会社アライドマテリアル
Priority to JP2023559064A priority Critical patent/JPWO2023176819A1/ja
Publication of WO2023176819A1 publication Critical patent/WO2023176819A1/ja
Publication of WO2023176819A9 publication Critical patent/WO2023176819A9/ja

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D35/00—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates

Definitions

  • the present disclosure relates to a cutting blade made of cemented carbide.
  • This application claims priority based on Japanese Patent Application No. 2022-043430, which is a Japanese patent application filed on March 18, 2022. All contents described in the Japanese patent application are incorporated herein by reference.
  • the cemented carbide cutting blade includes a base and a blade part that is provided on an extension of the base and has a cutting edge that is the cutting edge, and is a distortion of the WC particles that constitute the left and right blade surfaces that form the cutting edge.
  • the KAM value is 0 or more and 4.0 or less.
  • FIG. 1 is a front view of a cutting blade 1 made of cemented carbide.
  • FIG. 2 is a perspective view of the cutting blade 1 made of cemented carbide.
  • FIG. 3 is a perspective view of the two-stage cemented carbide cutting blade 1.
  • FIG. 4 is a front view of the cemented carbide cutting blade 1 shown for explaining the cutting method.
  • Patent Document 1 Japanese Unexamined Patent Publication No. 10-217181 discloses a flat cutting blade for cutting thin plate-like workpieces such as ceramic green sheets, which secures a narrow cutting edge angle that enables high-precision cutting.
  • the present invention discloses a flat cutting blade that has high buckling strength.
  • a solution to this problem is to form the cutting edge with a flat or concave curved surface that is symmetrical with respect to the center line Y, and to connect the cutting edge and the base with one or more reinforcing parts of the symmetrical concave curved surface. It is proposed to shorten the distance of the cutting section to ensure high-precision cutting while increasing buckling strength.
  • Patent Document 2 International Publication No. 2014-050884 discloses a base on a flat plate, left and right blade surfaces that are inclined to approach each other from both sides of the base, and a convex curved surface formed to connect the left and right blade surfaces.
  • the short distance between the intersection of two straight lines along the left and right blade surfaces and the tip of the cutting edge is 1 ⁇ m or more and 10 ⁇ m or less, and the tip
  • the length of the portion is different on the left and right sides with respect to the center line of the base, and the difference is 1 ⁇ m or more and 20 ⁇ m or less, and further, the internal angle of the intersection angle of the two straight lines along the left and right blade surfaces is 4 ⁇ m.
  • Patent Document 3 Japanese Unexamined Patent Publication No. 2004-174464 discloses that grinding grooves can be easily formed using a cup-shaped grindstone.
  • a grinding groove extending in the short side direction is formed on the blade surface, and the blade surface is composed of a plurality of stepped surfaces divided in the short side direction, and the stepped surface on the cutting edge side has a larger angle.
  • a cutting blade characterized by:
  • this patent describes a cutting blade made of cemented carbide that suppresses distortion (processing damage) of the WC grains that make up the cutting edge, improves chipping resistance, suppresses deterioration of cut surface quality and cutting resistance due to chipping, and provides a long-lasting product.
  • This invention relates to a long-life cemented carbide cutter.
  • a dicing method As methods for cutting green sheets, there are a method of cutting with a rotating round blade called a dicing method, and a push cutting method using a flat cutting blade as disclosed in the present disclosure.
  • the former method has disadvantages such as poor material yield due to a large amount of cutting waste and poor cutting speed, so the push-cutting method is useful for small-sized products.
  • FIG. 1 is a front view of a cemented carbide cutting blade 1.
  • FIG. 2 is a perspective view of the cutting blade 1 made of cemented carbide.
  • FIG. 3 is a perspective view of the two-stage cemented carbide cutting blade 1.
  • a cutting blade 1 made of cemented carbide includes a cutting edge part 2 that performs cutting, a connecting part 3 connected to the cutting edge part 2, and a cutting blade fixing part 5 connected to the connecting part 3. It has a base 4 fixed by.
  • the object to be cut 100 can be cut by pressing the cutting edge portion 2 against the object to be cut 100.
  • a cutting blade 1 made of cemented carbide as a flat cutting blade extends in the x direction orthogonal to the y and z directions in FIG.
  • Blade surfaces 201 and 202 are provided on both sides of the cutting edge portion 2.
  • the blade surfaces 203 and 204 are provided, resulting in a two-stage blade.
  • Each blade surface 201 to 204 may have a linear shape or a curved shape.
  • the ridgeline where the blade surface 201 and the blade surface 202 intersect is the blade edge 210.
  • the cemented carbide cutting blade 1 includes a connecting portion 3 as a base, and a cutting edge portion 2 as a blade portion that is provided on an extension of the connecting portion 3 and has a cutting edge 210 as the most distal end.
  • the KAM value which is the distortion of the WC particles constituting the left and right blade surfaces 201 and 202 forming the cutting edge 210, is 0 or more and 4.0 or less.
  • the KAM value which is the distortion of the WC particles forming the blade surfaces 201 and 202, is 0 or more and 4.0 or less, so cracks inside the WC are suppressed. It is possible to improve fracture resistance.
  • the KAM value is 0.3 or more and 4.0 or less. More preferably, the KAM value is 0.3 or more and 2.1 or less.
  • the cobalt content in the cemented carbide is 3% by mass or more and 25% by mass or less.
  • the hardness of the cemented carbide is a Vickers hardness of Hv 1300 or more and Hv 2030 or less.
  • Such thin blades are made of hard materials such as carbon tool steel, stainless steel, and cemented carbide.
  • machining is not easy, and the reasons for this are that, although the material is hard, although it has rigidity, it is difficult to cut, has low toughness and is easily chipped, and if the blade is thin, it is made of hard material. Particularly at the tip of the cutting edge, the blade tends to escape due to the pressure of the grindstone during machining.
  • the WC that makes up the blade surface deteriorates due to the accuracy of the processing machine, changes in the grindstone over time, and external disturbances such as vibration.
  • the number of chips that occur can be reduced and the size of the chips can be reduced.
  • the material used for the cutting blade is a cemented carbide whose main components are tungsten carbide and cobalt, and the average grain size of the tungsten carbide crystal grains in the alloy is 0.1 ⁇ m to 4 ⁇ m, preferably 2 ⁇ m or less.
  • the average grain size is determined by measuring the surface of the cemented carbide in an SEM photograph at a magnification of 10,000 times, selecting 100 arbitrary crystals, and using the formula (major axis + minor axis)/2 for each crystal. The particle size was calculated based on , and the average value of 100 particle sizes was determined.
  • tungsten carbide it is also possible to add 0.1 to 2% by mass of TaC (tantalum carbide), a component for suppressing crystal grain growth.
  • This additive can also be replaced and combined with V 8 C 7 (vanadium carbide), Cr 3 C 2 (chromium carbide). In that case, the amount of each added is 0.1 to 2% by mass.
  • the cobalt used in the cemented carbide preferably ranges from 3 to 25% by mass, more preferably from 5 to 20% by mass.
  • TaC, V 8 C 7 and Cr 3 C 2 are obtained by dissolving these components from cemented carbide using nitric acid or hydrofluoric acid, and then converting the resulting liquid into a liquid using an ICP emission spectrometer (Issuance spectroscopy). can be measured. After Co is dissolved from a cemented carbide using nitric acid or hydrofluoric acid, the mass of the solution whose liquid properties are adjusted can be measured using a potentiometric titration device (potentiometric titration method).
  • the Vickers hardness Hv is preferably 1,300 or more and 2,030 or less, and a more preferable range is 1,850 or more and 2,150 or less.
  • the base material thickness T of the cemented carbide cutting blade is preferably 0.1 mm or more and 0.6 mm or less. By setting it within this range, it can be used as a cutting blade (compatible with a cutting machine) for laminated ceramic green sheets.
  • the cutter with a thickness of 0.1 mm is used for the thinnest chips of ceramic capacitors, and can reduce the grinding allowance and reduce the grinding resistance when producing sharp edges such as a 20° cutting edge angle by grinding, resulting in high precision. You can make a cutting edge.
  • cutters with a base material thickness of 0.4 to 0.6 mm are suitable for cutting thick chips with a thickness of 1 mm or more because the rigidity (bending of the root of the cutting edge) can be improved by increasing the thickness of the cutter itself. There is. Another advantage is that the rigidity of the base of the blade is increased, making diagonal cuts less likely to occur.
  • the thickness of a carbide cutting blade can be measured using a micrometer or a laser measuring device.
  • the relationship between the length L (mm) and the height W (mm) (FIG. 2) of the cemented carbide cutting blade is preferably 1 ⁇ L/W ⁇ 20.
  • the cutting edge angle ⁇ is 6° ⁇ 30° or less.
  • the smaller the cutting edge angle the smaller the cutting resistance and the less likely diagonal cutting will occur. In other words, the volume that penetrates into the workpiece becomes smaller.
  • a single-stage blade may be used, but since the width dimension forming the blade surface becomes large, there are problems such as the blade tip being prone to collapse due to grinding resistance and making it difficult to process the blade edge into a highly accurate shape. It is known that chipping during cutting is extremely likely to occur when ⁇ 20°.
  • Example A tip blade portion was formed using cemented carbide FM10K material manufactured by Allied Materials Co., Ltd.
  • the flat cutting blade used in the test has a blade length direction L: 40 mm, a base thickness T: 0.1 mm, and a blade height W: 25.0 mm.
  • the cutting edge angle ⁇ of the cutting edge part 2 as the cutting part is 20° ⁇ 5'
  • the first stage blade width is 0.1 mm
  • the second stage blade angle (the extended plane of the second stage blade surface intersects angle) was set to 4° ⁇ 10'.
  • a surface grinder was used, and a diamond cylindrical grindstone was used to true the side of the grindstone, and the material was fixed on a special work rest with an adjustable angle.
  • cemented carbide cutting blades 1 having sample numbers 1 to 45, 101 to 145, 201 to 245, and 301 to 345 shown in Tables 1 to 8 were produced.
  • the roughness Sa (arithmetic mean roughness) of the blade surface was measured by using a non-contact three-dimensional roughness measuring device (Nexview (registered trademark)) manufactured by Zygo Corporation, and measuring the measurement range in the above longitudinal section in the X direction directly below the cutting edge. It was set to 140 ⁇ m and 30 ⁇ m in the Z direction.
  • the measurement field of view was set to have an objective lens magnification of 50 times and a ZOOM magnification of 1 time.
  • ⁇ Measurement of blade edge width> To measure the edge line width of the cutting edge, use a JEOL Schottky field emission scanning electron microscope JSM7900F to take an image from a direction perpendicular to the edge of the cutting edge at 5,000 to 10,000 times magnification, and utilize mechanical coordinates and length measurement functions. It was measured by It was confirmed that the edge line width of the cutting edge was 0.5 ⁇ m or less in all the samples, and these samples were used as test blades.
  • ⁇ WC distortion measurement> The distortion of the WC particles on the left and right blade surfaces 201 and 202 constituting the cutting edge 210 is measured using a reflected electron beam formed using the SEM/EBSD (Electron Back Scatter Diffraction) method, an electron back scattering diffraction device mounted on the aforementioned electron microscope.
  • This method uses a diffraction pattern (channeling pattern) to measure crystal orientation.
  • the measurement conditions are as follows: measurement magnification: 20,000 times, acceleration voltage: 25 KV, irradiation current: 12 nA, using a reflected electron beam diffraction pattern (channeling pattern) formed by applying an electron beam to the cutting edge at a 70° inclination. Distortion was quantified and evaluated by measuring a KAM (kernel average misorientation value) map.
  • Chipping of the cutting blade was measured using a tool measuring microscope STM-UM manufactured by Olympus Corporation at a magnification of 500 times. In all samples, it was confirmed that the chip depth was within 1.5 ⁇ m and the chip width was within 10 ⁇ m.
  • an object to be cut (work) 100 is cut with a cutting blade 1 made of cemented carbide.
  • An acrylic base 102 is placed on the cutting dynamometer 103.
  • a thermally releasable adhesive sheet 101 is interposed between the base and the object 100 to be cut.
  • the object to be cut 100 is cut by moving the object to be cut 100 in the direction shown by the arrow 110 while reciprocating the cutting blade 1 made of cemented carbide in the direction shown by the arrow 111.
  • a foamed double-sided adhesive sheet of 1 mm and a workpiece (the above-mentioned PVC board) having a thickness of 0.5 mm ⁇ 0.1 (these constitute the object to be cut 100) are used, and the installation accuracy of the cutter is set at the workpiece in the longitudinal direction and the blade angle of ⁇ 0.1 mm. 5°, and the cross-sectional angle between the workpiece and the blade was 90° ⁇ 0.5°.
  • the cutting conditions were a cutting speed of 300 mm/s, a cutting interval of 12 mm, and an indentation amount of 0.1 mm in the adhesive layer of the thermally releasable sheet.
  • PVC was cut 1000 times, and the cutting resistance, cut surface quality, and The number of chips of 10 ⁇ m or more when cut once, 500 times, and 1000 times was evaluated. The results obtained by repeating this result for each condition are shown in Tables 1 to 8.
  • the preferable KAM value range is 0.3 or more and 4.0 or less.
  • a better range of KAM values is 0.3 to 2.1.
  • the most preferable value is 0.3 or less.
  • setting the KAM value to a range of 0 or more and less than 0.3 is expensive, so in the above embodiment, the KAM value is set to 0.3 or more. That is, considering only performance, it is preferable to set the KAM value to less than 0.3.
  • the number of chips with the corresponding chip width is shown.
  • the column “10 ⁇ m ⁇ ” is the number of chips with a width exceeding 9.5 ⁇ m
  • the column “6 ⁇ m ⁇ 9 ⁇ m” is the number of chips with a width exceeding 6.5 ⁇ m and 9.5 ⁇ m or less
  • the column “3 ⁇ m ⁇ 5 ⁇ m” is the number of chips with a width exceeding 9.5 ⁇ m.
  • the column shows the number of chips with a width of more than 2.5 ⁇ m and less than 5.5 ⁇ m.
  • KAM value good cutting results were obtained in terms of the number of chips in the range of 0.3 or more and 4.0 or less.
  • a better range of KAM values is 0.3 or more and 2.1 or less.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Powder Metallurgy (AREA)
  • Nonmetal Cutting Devices (AREA)
PCT/JP2023/009816 2022-03-18 2023-03-14 超硬合金製切断刃 WO2023176819A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2023559064A JPWO2023176819A1 (zh) 2022-03-18 2023-03-14

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-043430 2022-03-18
JP2022043430 2022-03-18

Publications (2)

Publication Number Publication Date
WO2023176819A1 true WO2023176819A1 (ja) 2023-09-21
WO2023176819A9 WO2023176819A9 (ja) 2024-02-29

Family

ID=88023860

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/009816 WO2023176819A1 (ja) 2022-03-18 2023-03-14 超硬合金製切断刃

Country Status (3)

Country Link
JP (1) JPWO2023176819A1 (zh)
TW (1) TW202346051A (zh)
WO (1) WO2023176819A1 (zh)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015101747A (ja) * 2013-11-22 2015-06-04 住友電気工業株式会社 超硬合金およびこれを用いた表面被覆切削工具
WO2017057266A1 (ja) * 2015-09-29 2017-04-06 京セラ株式会社 棒状体及び切削工具
JP2021160017A (ja) * 2020-03-31 2021-10-11 株式会社タンガロイ 被覆切削工具
WO2021256282A1 (ja) * 2020-06-19 2021-12-23 株式会社アライドマテリアル 超硬合金製切断刃

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015101747A (ja) * 2013-11-22 2015-06-04 住友電気工業株式会社 超硬合金およびこれを用いた表面被覆切削工具
WO2017057266A1 (ja) * 2015-09-29 2017-04-06 京セラ株式会社 棒状体及び切削工具
JP2021160017A (ja) * 2020-03-31 2021-10-11 株式会社タンガロイ 被覆切削工具
WO2021256282A1 (ja) * 2020-06-19 2021-12-23 株式会社アライドマテリアル 超硬合金製切断刃

Also Published As

Publication number Publication date
WO2023176819A9 (ja) 2024-02-29
TW202346051A (zh) 2023-12-01
JPWO2023176819A1 (zh) 2023-09-21

Similar Documents

Publication Publication Date Title
TWI584928B (zh) 平刃狀切割刃以及綠板切割刃
KR101599201B1 (ko) 평날 형상 절단날 및 그린 시트 절단날
JP7142802B2 (ja) 超硬合金製切断刃
WO2023176819A1 (ja) 超硬合金製切断刃
WO2023176818A1 (ja) 超硬合金製切断刃
WO2021256280A1 (ja) 超硬合金製切断刃
JP6938781B2 (ja) 平刃状切断刃
JP7142801B2 (ja) 超硬合金製切断刃
JP7292487B2 (ja) 超硬合金製切断刃
JP7144641B2 (ja) 超硬合金製切断刃
WO2024143062A1 (ja) 平刃状切断刃
CN113587853A (zh) 一种测量切屑变形的方法

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2023559064

Country of ref document: JP

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23770774

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 1020247021228

Country of ref document: KR