WO2012100402A1 - Fraise composite - Google Patents

Fraise composite Download PDF

Info

Publication number
WO2012100402A1
WO2012100402A1 PCT/CN2011/002193 CN2011002193W WO2012100402A1 WO 2012100402 A1 WO2012100402 A1 WO 2012100402A1 CN 2011002193 W CN2011002193 W CN 2011002193W WO 2012100402 A1 WO2012100402 A1 WO 2012100402A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
edge
crack
composite
reamer
Prior art date
Application number
PCT/CN2011/002193
Other languages
English (en)
Chinese (zh)
Inventor
李仕清
Original Assignee
Li Shiqing
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
Priority claimed from CN201110033238.0A external-priority patent/CN102133661B/zh
Application filed by Li Shiqing filed Critical Li Shiqing
Publication of WO2012100402A1 publication Critical patent/WO2012100402A1/fr

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D77/00Reaming tools

Definitions

  • the present invention relates to a reamer for use in a reaming of a machined drill or the like.
  • the reamer used in machining consists of a chamfering edge, a minor cutting edge, a cutting surface, a minor cutting surface, and a cutting edge.
  • the cutting edge has a single cutting force, that is, each reamer has a plurality of cutting bars. Each cutting bar has a complete cutting edge.
  • the cutting edge of the structure, especially the taper reamer has a large overall force and resistance, which often causes the reamer to break, causing waste, and even causing work accidents, and hand hinges. Knives, because of the great resistance, are more laborious when reaming, workers have a lot of work and are inefficient.
  • the present invention has been made in view of the above problems, and provides a novel composite reamer which has high heat dissipation efficiency, low cutting resistance and long life.
  • the present invention adopts the following technical solution - a composite reamer comprising a tool shank and a tool head, the tool shank and the tool head being integrally formed, the tool head integrally provided with a plurality of cutting blades or spiral cutting a cutting surface or a spiral cutting surface on each cutting blade or spiral cutting bar, chamfered at an axial front portion of the cutting surface or the spiral cutting surface, forming a chamfered surface, and a cutting surface facing the cutting direction Or the rear side or the back side of the spiral cutting surface, which is a rear cutting surface or a sub-cutting surface or a helical auxiliary cutting surface, and the cutting surface or the spiral cutting surface intersects the rear cutting surface or the minor cutting surface or the spiral auxiliary cutting surface to form at least a cutting edge, or at least one chamfering edge, or at least one helical cutting edge, characterized in that said anti-cracking compound reamer is used in various hand reamer, or various adjustable hand reamer, or each
  • the blade JE performs various "edges" formed by the combination of the blades.
  • a compound reamer includes a tool shank and a tool head, the tool shank and the tool head are integrally formed, and the tool head is integrally provided with a plurality of cutting blades or spiral cutting bars, on each cutting blade or spiral cutting bar , having a cutting surface or a spiral cutting surface, chamfering the axial front portion of the cutting surface or the spiral cutting surface, forming a chamfered surface, on the cutting surface or the rear side or the back side of the spiral cutting surface facing the cutting direction,
  • the cutting face, or the minor cutting face, or the helical minor cutting face, the cutting face or the helical cutting face intersects the rear cutting face, or the minor cutting face, or the helical minor cutting face, forming at least one cutting edge, or at least one chamfering edge , or at least one helical cutting edge, characterized by the anti-cracking compound reamer in various hand reamer, or various adjustable hand reamer, or various straight shank reamer, or various taper shanks Reamers,
  • the protrusion is provided with at least one step-like crack-resistant composite helical cutting surface, or a crack-resistant composite cutting surface, and at least one stepped Anti-cracking composite helical secondary cutting surface, or crack-resistant composite secondary cutting surface, or crack-resistant composite chamfering surface, or crack-resistant composite cutting surface, and at least one stepped crack-resistant composite cutting edge, or crack-resistant composite spiral
  • the cutting edge extends to the front cutter head, and on the cutting head of the crack-resistant composite reamer, the cutting surface facing the cutting direction, or the spiral cutting surface, has at least one step-like crack-resistant composite cutting edge.
  • the cutting surface facing the cutting direction, or the spiral cutting surface has at least one stepped cutting edge, or a chamfering edge, or a spiral cutting edge, Or a crack-resistant composite cutting edge, or a crack-resistant composite helical cutting edge, or a crack-resistant composite chamfering edge, provided with at least one notch, distributed on the cutting face, or a helical cutting face, or a rear cutting face, or a spiral pair At least one groove is formed on the cutting face, or the side cutting face, or the chamfered surface.
  • each of the cutting knives of the composite reamer, or the cutting body, or the front portion of the spiral cutting strip in the axial cutting direction, or the front portion of the spiral cutting strip in the spiral direction is formed.
  • each cutting blade or cutting body, or helical cutting bar of the composite reamer is integral, or combined, or welded together, disc-shaped, or cylindrical, or various other structures a cutting edge, or a spiral cutting edge, provided with a stepped cutting surface, or a crack-resistant composite helical cutting surface, and formed with a crack-resistant composite stepped blade, or a slitting edge, or a crack-resistant composite of the notched edge Reamer.
  • the tool shank of the composite reamer is positioned by a positioning hole, or a positioning groove, or a variety of straight shanks, or tool shanks of various taper shanks.
  • a cutter bar or a spiral cutting bar is integrally provided, or a crack-proof composite alloy cutting blade or an alloy spiral cutting bar on the tool head is characterized in that , cutting blade, or spiral cutting bar, or cutting blade of integral alloy reamer, or cutting edge of alloy spiral cutting bar, or chamfering edge, or spiral cutting edge, or crack-resistant composite cutting edge, or crack-resistant composite
  • the chamfered edge is also stepped on the cutting surface or the chamfered surface or the spiral cutting surface of the composite reamer.
  • the force distribution of the cutting edge or the spiral cutting edge is decomposed, and the cutting edge or spiral cutting is enhanced.
  • the crack resistance of the blade enhances the heat dissipation effect of the cutting edge and the cutting surface, or the spiral cutting edge and the spiral cutting surface, thereby improving the cutting efficiency of the composite reamer and prolonging the service life of the composite reamer, and the composite cutting edge Or a composite spiral cutting edge stepped step or compound stepped edge, or a 3 notch edge, or a 4 composite notch edge that overlaps the notch edge.
  • the various cutting edges or combination edges further increase efficiency and expand The scope of application of compound reamer.
  • Fig. 1 is a schematic view of a composite reamer according to a first embodiment of the present invention.
  • FIG. 2 is a schematic view of a composite reamer according to a second embodiment of the present invention.
  • Fig. 3 is a schematic view of a composite reamer according to a third embodiment of the present invention.
  • Fig. 4 is a schematic view of a composite reamer according to a fourth embodiment of the present invention.
  • Fig. 5 is a schematic view of a composite reamer according to a fifth embodiment of the present invention.
  • Embodiments 1-7 a composite cutting edge or a composite spiral cutting edge or a concave edge or a stepped edge or a minute is mainly used.
  • the same components are denoted by the same reference numerals, and the detailed description thereof will be omitted.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1 :
  • the cutting edge or the chamfering edge or the spiral cutting edge of the knife is a straight edge or a tapered blade or a helical blade reamer, and includes a positioning handle 1 and a cutter head 2, the positioning handle 1 and the cutter head 2 are integrally formed, and the cutter head 2 body
  • a plurality of cutting tool bodies 3 are provided, and each of the cutting tool bodies 3 has a cutting face 4 which is a rear cutting face 5 or a side cutting face 6 on the rear side or the back side of the cutting face 4 facing the cutting direction, cutting The face 4 intersects the rear cutting face 5 or the side cutting face 6 to form at least one cutting edge or helical cutting edge 8 or at least one chamfering edge 9 facing the inside of the cutting face 4 in the cutting direction, the projection being arranged at least one
  • the composite cutting face 11 or the composite rear cutting face 14 is formed on each of the cutting blade or the cutting blade body 3 along the cutting face 4, the original cutting face 4 is formed into a small heat sink. And the formation of the composite cutting edge 13 and the cutting edge 15 enhances the heat dissipation strength of the cutting edge or the helical cutting edge 8 and the chamfering edge 9 so that the milling cutter always maintains sharpness and strength, thereby improving efficiency and extending service life.
  • a cutting edge or chamfering edge or a helical cutting edge of a cemented carbide or kneading or integral or other reamer is a straight or tapered blade or a helical blade reamer, comprising a locating shank 1 and a tool head 2, the locating shank 1 and The cutter head 2 is integrally formed, and the cutter head 2 is integrally provided with a plurality of cutter bodies 3, and each of the cutter bodies 3 has a cutting face 4 on the rear side or the back side of the cutting face 4 facing the cutting direction.
  • the cutting face 4 intersects the rear cutting face 5 or the side cutting face 6 to form at least one cutting edge or helical cutting edge 8 or at least one chamfering edge 9 for cutting in the cutting direction
  • the inner side of the face 4 is provided with at least one stepped composite cutting face 11 or a composite rear cutting face 14 and at least one primary cutting edge 15, at least one primary cutting edge 15, and the cutting face 4 is formed to be small Reinforcement table, at the cutting edge or spiral cutting edge 8 or chamfering edge
  • At least one notch blade 7 is also provided on the cutting edge 15 or the composite cutting edge 13 and extends into the cutting face 4 or the rear cutting face 5 to form at least one groove 16, the side cutting edge 9 and the cutting edge 15 A stepped edge is formed.
  • the composite cutting face 11 or the composite rear cutting face 14 is formed on each of the cutting blade or the cutting blade body 3 along the cutting face 4, the original cutting face 4 is formed into a small heat sink. And the formation of the composite cutting edge 13 and the cutting edge 15 enhances the heat dissipation strength of the cutting edge or the helical cutting edge 8 and the chamfering edge 9 so that the milling cutter always maintains sharpness and strength, thereby improving efficiency and extending service life.
  • a notch edge 7 is provided on the cutting edge or spiral cutting edge 8 or the chamfering edge 9 or the composite cutting edge 13 or the cutting edge 15 Decomposing the original cutting edge or the helical cutting edge 8 to reduce the force and increase the strength, thereby further improving the efficiency, further extending the service life, and causing the cutting method to decompose the overall force of the tool into a plurality of local forces, and the heat sink It also effectively increases the heat dissipation function, which extends the service life of the tool and maintains high strength throughout the machining process.
  • the cutting edge or the chamfering edge or the helical cutting edge of the integrated or other reamer is a straight or tapered blade or a helical blade reamer, comprising a positioning handle 1 and a tool head 2, the positioning handle 1 and the tool head 2 being formed as In one piece, the cutter head 2 is integrally provided with a plurality of cutter bodies 3, and each of the cutter bodies 3 has a cutting face 4, and a rear cutting face 5 on the rear side or the back side of the cutting face 4 facing the cutting direction Or the side cutting face 6, the cutting face 4 intersecting the rear cutting face 5 or the side cutting face 6 is formed with at least one cutting edge or helical cutting edge 8 or at least one chamfering edge 9 facing the inside of the cutting face 4 in the cutting direction,
  • the protrusion is provided with at
  • the composite cutting face 11 or the composite rear cutting face 14 is formed on each of the cutting blade or the cutting blade body 3 along the cutting face 4, the original cutting face 4 is formed into a small heat sink. And the formation of the composite cutting edge 13 and the cutting edge 15 enhances the heat dissipation strength of the cutting edge or the helical cutting edge 8 and the chamfering edge 9 so that the milling cutter always maintains sharpness and strength, thereby improving efficiency and extending service life.
  • the cutting edge or the chamfering edge or the helical cutting edge of the integrated or other reamer is a straight edge or a tapered blade or a helical blade reamer, comprising a positioning handle 1 and a tool head 2, the positioning handle 1 and the tool head 2 being formed as In one piece, the cutter head 2 is integrally provided with a plurality of cutter bodies 3, and each of the cutter bodies 3 has a cutting face 4, and a rear cutting face 5 on the rear side or the back side of the cutting face 4 facing the cutting direction Or the side cutting face 6, the cutting face 4 intersecting the rear cutting face 5 or the side cutting face 7 to form at least one cutting edge 8 or at least one side cutting edge 9 facing the inner side of the cutting face in the cutting direction, the projection being provided at least a stepped composite cutting face 11
  • the opening cutting edge 3 ⁇ 4 4 or the side cutting surface 6 or the rear cutting surface 5 or the side cutting surface 6 is extended to form at least one groove 21, and the side cutting edge 9 and the composite side cutting edge 15 are formed with a stepped edge.
  • the original cutting face 4 is formed into a small heat sink.
  • the formation of the composite cutting edge 13 and the composite side cutting edge 15 enhances the heat dissipation strength of the cutting edge 8 and the side cutting edge 9 so that the milling cutter always maintains sharpness and strength, thereby improving efficiency and extending service life through the cutting edge.
  • 8 or the side cutting edge 9 or the composite cutting edge 13 or the composite side cutting edge 15 is provided with a notch edge 16 to decompose the original cutting edge to reduce the force and increase the strength, thereby further improving the efficiency and further prolonging the service life.
  • the cutting method decomposes the overall force of the tool into a plurality of local forces, and the heat sink effectively increases the heat dissipation function, prolonging the service life of the tool and maintaining high strength throughout the machining process.
  • a cutting edge or chamfering edge or a helical cutting edge of a metallurgical or welded or integral or other reamer is a straight or tapered or helical blade reamer, including a shank 1 and a tool head 2, the shank 1 and the tool The head 2 is integrally formed, and the cutter head 2 is integrally provided with a plurality of cutter bodies 3, and each of the cutter bodies 3 has a cutting face 4 on the rear side or the back side of the cutting face 4 facing the cutting direction.
  • the rear cutting face 5 or the side cutting face 6, the cutting face 4 intersects the rear cutting face 5 or the side cutting face 6 to form at least one cutting edge or helical cutting edge 8 or at least one chamfering edge 9, facing the cutting face in the cutting direction
  • the inner side of the protrusion 4 is provided with at least one stepped composite cutting surface 11 or a composite rear cutting surface 14 and at least one primary cutting edge 15, at least one primary cutting edge 15, and the cutting surface 4 is formed to have a small heat dissipation Table, at the cutting edge or spiral cutting edge 8 or down
  • At least one notch 7 is also provided on the blade 9 or the cutting edge 15 or the composite cutting edge 13 and extends into the cutting face 4 or the rear cutting face 5 to form at least one groove 16, the side cutting edge 9 and the cutting edge 15 is formed with a stepped edge.
  • the composite cutting face 11 or the composite rear cutting face 14 is formed on each of the cutting blade or the cutting blade body 3 along the cutting face 4, the original cutting face 4 is formed into a small heat sink. And the formation of the composite cutting edge 13 and the cutting edge 15 enhances the heat dissipation strength of the cutting edge or the helical cutting edge 8 and the chamfering edge 9 so that the milling cutter always maintains sharpness and strength, thereby improving efficiency and extending service life.
  • the tool range of the present invention can be used for various combinations of reamer, various tapered blade reamer, various straight edge Reamers, various spiral blade reamer.
  • notch edges 7 are formed along the cutting edge 8 on each of the cutting edges 3, the notch edges 7 are gradually enlarged in the cutting direction to the cutting face 4 or the rear cutting face. 5 is formed as a groove 16 to decompose the overall force of the cutting blade 3 of the reamer into a plurality of small-section forces, through the notch 7 Instruction manual
  • the notch edge 7 or the step edge that is, the cutting edge 8 and the composite cutting edge 13 are added to the cutting surface of each of the cutting edges 3.
  • the cutting edge 8 is decomposed into a number of small cutting edges, the cutting force of the cutting edge is decomposed, the cutting resistance is reduced, the possibility of rupture of the reamer is reduced, and the working efficiency is improved.
  • the technique can be applied to various reamer.
  • the application range of the present invention can be expanded, the cutting efficiency of the reamer can be improved, and the service life can be prolonged.
  • the tool of the present invention can also be used for a stepped composite cutting face or a stepped composite rear cutting face which is convexly formed on the cutting faces of all the reamer.
  • the cutting edge or the side cutting edge is provided with a notch edge, and the opening extends toward the cutting surface or the side cutting surface or the rear cutting surface to form a groove, the cutting edge Or a side cutting edge or a composite cutting edge or a composite side cutting edge is provided with a notch blade, and is a composite hob having a plurality of combinations in which openings are formed to extend into the cutting surface or the side cutting surface or the rear cutting surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)

Abstract

La présente invention concerne une fraise composite qui présente un rendement thermique élevé, une faible résistance, une longue durée de vie et qui est facile à installer lors de l'alésage. La fraise composite comprend une poignée d'installation (1) et une tête d'outil (2) équipée de multiples lames de coupe (3) ou lames de coupes en spirale et pourvue d'une face de coupe (4), d'une face de coupe en spirale ou d'une face chanfreinée. La saillie interne de la face de coupe (4) dans la direction de coupe est dotée d'une face de coupe composite (11), d'une face de coupe en spirale composite, d'une face de coupe auxiliaire en spirale composite, d'une face de coupe latérale composite, d'une face de coupe arrière composite (14) ou d'une face chanfreinée composite formant un bord de coupe composite (13), un bord de coupe en spirale composite, un bord chanfreiné composite et formant un bord étagé ou un bord de refendage (15). Un bord de coupe, un bord chanfreiné ou un bord de coupe en spirale (8) est équipé d'un bord présentant une encoche (7), une ouverture s'étendant vers la face de coupe (4), la face de coupe en spirale, une face de coupe arrière (5), une face de coupe latérale (6), une face de coupe auxiliaire en spirale ou une face chanfreinée pour former une rainure (16). Le bord de coupe, le bord chanfreiné, le bord de coupe en spirale (8), un bord de coupe composite, un bord de coupe en spirale composite ou le bord chanfreiné composite est équipé d'un bord présentant une encoche (7).
PCT/CN2011/002193 2011-01-24 2011-12-26 Fraise composite WO2012100402A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110033238.0A CN102133661B (zh) 2011-01-24 一种复合铰刀
CN201110033238.0 2011-01-24

Publications (1)

Publication Number Publication Date
WO2012100402A1 true WO2012100402A1 (fr) 2012-08-02

Family

ID=44293662

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/002193 WO2012100402A1 (fr) 2011-01-24 2011-12-26 Fraise composite

Country Status (1)

Country Link
WO (1) WO2012100402A1 (fr)

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083643A (en) * 1977-05-16 1978-04-11 Colt Industries Operating Corporation Roughing cutter
US4285618A (en) * 1979-10-12 1981-08-25 Shanley Stephen E Jr Rotary milling cutter
JPS60161014A (ja) * 1984-01-27 1985-08-22 Nippon Kogu Seisakusho:Kk エンドミル
JPH03190615A (ja) * 1989-12-19 1991-08-20 Nachi Fujikoshi Corp ラフイングカッタ
FR2690100A1 (fr) * 1992-04-17 1993-10-22 Dassault Aviat Alésoir, notamment pour matières composites.
JP2003136323A (ja) * 2001-10-29 2003-05-14 Daishowa Seiki Co Ltd 切削工具及び工具ホルダー
CN2885474Y (zh) * 2006-04-06 2007-04-04 长春奥普光电技术股份有限公司 一种带有断屑槽的多刃切削铰刀
US7399147B1 (en) * 2005-08-09 2008-07-15 Vandyke Jr Daryl C End mill bit with notched teeth
DE102007034087A1 (de) * 2007-06-28 2009-01-02 Itsko Polevoi Fräserwerkzeug
US7544021B2 (en) * 2005-11-01 2009-06-09 Berkshire Precision Tool. Llc Rotary cutting tool with non-uniform distribution of chip-breaking features
DE102008025962A1 (de) * 2008-05-30 2009-12-03 Kennametal Inc. Reibahle
US20100215447A1 (en) * 2009-02-20 2010-08-26 Kennametal Inc. Rotary cutting tool with chip breaker pattern
CN201644942U (zh) * 2010-04-08 2010-11-24 青岛海信模具有限公司 一种带断屑槽的铰刀
CN102133661A (zh) * 2011-01-24 2011-07-27 李仕清 一种复合铰刀

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083643A (en) * 1977-05-16 1978-04-11 Colt Industries Operating Corporation Roughing cutter
US4285618A (en) * 1979-10-12 1981-08-25 Shanley Stephen E Jr Rotary milling cutter
JPS60161014A (ja) * 1984-01-27 1985-08-22 Nippon Kogu Seisakusho:Kk エンドミル
JPH03190615A (ja) * 1989-12-19 1991-08-20 Nachi Fujikoshi Corp ラフイングカッタ
FR2690100A1 (fr) * 1992-04-17 1993-10-22 Dassault Aviat Alésoir, notamment pour matières composites.
JP2003136323A (ja) * 2001-10-29 2003-05-14 Daishowa Seiki Co Ltd 切削工具及び工具ホルダー
US7399147B1 (en) * 2005-08-09 2008-07-15 Vandyke Jr Daryl C End mill bit with notched teeth
US7544021B2 (en) * 2005-11-01 2009-06-09 Berkshire Precision Tool. Llc Rotary cutting tool with non-uniform distribution of chip-breaking features
CN2885474Y (zh) * 2006-04-06 2007-04-04 长春奥普光电技术股份有限公司 一种带有断屑槽的多刃切削铰刀
DE102007034087A1 (de) * 2007-06-28 2009-01-02 Itsko Polevoi Fräserwerkzeug
DE102008025962A1 (de) * 2008-05-30 2009-12-03 Kennametal Inc. Reibahle
US20100215447A1 (en) * 2009-02-20 2010-08-26 Kennametal Inc. Rotary cutting tool with chip breaker pattern
CN201644942U (zh) * 2010-04-08 2010-11-24 青岛海信模具有限公司 一种带断屑槽的铰刀
CN102133661A (zh) * 2011-01-24 2011-07-27 李仕清 一种复合铰刀

Also Published As

Publication number Publication date
CN102133661A (zh) 2011-07-27

Similar Documents

Publication Publication Date Title
JP5475808B2 (ja) 切削加工用の回転工具及び切削インサート
WO2009114958A1 (fr) Foret hélicoïdal
WO2012094796A1 (fr) Fraise en spirale à bord composite
WO2012094794A1 (fr) Fraise composite
CN204639254U (zh) 一种硬质合金钻铰锪复合刀具
CN102126039A (zh) 复合定位切削的螺旋刀具
JP2008229744A (ja) 切削インサートおよびインサート着脱式転削工具
JP2014136264A (ja) 正面フライス用切削インサート及び刃先交換式正面フライス
CN202180238U (zh) 复合刃背定进给量阶梯钻
CN102039439B (zh) 一种复合定位复合切削的定心螺旋刀具
WO2007051344A1 (fr) Outil de coupe helicoidal multi-niveaux
CN103978255A (zh) 加工异径孔的复合铣刀
CN102380627B (zh) 变后角宽孔倒角刀
CN206614071U (zh) 铣削刀片和端面铣刀
WO2012094795A1 (fr) Agrégat de copiage de roue dentée composite, couteau de rasage de roue dentée composite ou couteau plan composite
CN211387075U (zh) 一种可断续加工的高效三刃扩孔刀
WO2012094797A1 (fr) Outil à tailler les engrenages composite
WO2012100402A1 (fr) Fraise composite
CN202411557U (zh) 一种复合铰刀
CN112620760B (zh) 具有pcd镶片及微刃的组合铣刀
CN204799964U (zh) 一种用于高温合金半精加工用新型可转位槽型车刀片
CN210996695U (zh) 一种去除铸造盲孔环形铁屑的新型阶梯成型扩孔刀
CN207953147U (zh) 一种复合铣槽铰孔刀具
CN103381508A (zh) 一种复合铰刀
CN103381505A (zh) 一种复合拉刀

Legal Events

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

Ref document number: 11857290

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11857290

Country of ref document: EP

Kind code of ref document: A1