CN1059138C - 具有中心螺纹孔的切削刀具 - Google Patents

具有中心螺纹孔的切削刀具 Download PDF

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CN1059138C
CN1059138C CN95193485A CN95193485A CN1059138C CN 1059138 C CN1059138 C CN 1059138C CN 95193485 A CN95193485 A CN 95193485A CN 95193485 A CN95193485 A CN 95193485A CN 1059138 C CN1059138 C CN 1059138C
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hole
cutting tool
cutter
screw thread
bolt
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CN1150398A (zh
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约兰·潘萨尔
比约恩·霍坎松
斯特凡·罗曼
佩尔-安德斯·霍尔姆斯特伦
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Sandvik AB
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Sandvik AB
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B27/00Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/16Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B27/00Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/16Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
    • B23B27/1666Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with plate-like cutting inserts clamped by a clamping member acting almost perpendicularly on chip-forming plane
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2200/00Details of cutting inserts
    • B23B2200/36Other features of cutting inserts not covered by B23B2200/04 - B23B2200/32
    • B23B2200/3618Fixation holes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2260/00Details of constructional elements
    • B23B2260/138Screw threads
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00Cutters, for shaping
    • Y10T407/22Cutters, for shaping including holder having seat for inserted tool
    • Y10T407/2272Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
    • Y10T407/2274Apertured tool
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00Cutters, for shaping
    • Y10T407/27Cutters, for shaping comprising tool of specific chemical composition

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Milling Processes (AREA)
  • Powder Metallurgy (AREA)
  • Dowels (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Ceramic Products (AREA)
  • Adornments (AREA)

Abstract

切削刀具由渗碳硬质合金或陶瓷制成并用于切削加工金属材料。切削刀具具有一中心孔(9),该孔上开有螺纹。此点实现至今已知的具有光滑的孔面的刀具还要大的孔径并从而实现了更大的固定力。

Description

具有中心螺纹孔的切削刀具
本发明涉及一种具有中心螺纹孔的切削刀具。
目前市场上的绝大多数各种不同的切削刀具都具有一个中心透孔。该孔用于安装一个相应的将刀具固定在刀杆上的锁紧螺栓。在切削刀具用于车削时,刀杆通常由一根车刀棒构成;在车削刀具用于铣削时,刀杆例如是铣刀体、纵向铣刀或端面铣刀。切削刀具也可以用于镗孔,这时它被螺栓固定在镗轴上。其最大的共同点在于,这种刀具是一种转位刀具,即当切削刀刃被磨损时,可松开锁紧螺栓并将刀具旋转半周或四分之一周,其中将新的刀刃定位并对准加工位置。切削刀具,也包括转位切削刀具具有无数不同的几何形状,以实现良好的切削、切削控制和低耗。这些刀具大多由有涂层或无涂层的渗碳硬质合金制成,但也可是由不同的陶瓷材料制成的刀具。它们通常具有正方、三角、菱形、矩形或六角等基本形状,但也有其它形状的。然而它们都有一点是共同的,即它们在其几何中心点都有一个透孔。该透孔可以有不同的孔设计,但有一点是共同的,即其孔壁是充分光滑的。如上所述,螺栓被插入此光滑的孔内并旋入刀杆本身上的螺纹孔内,刀具支承在刀杆上并固定在其上。这种基本配置的效果通常是令人满意的,尽管如此但仍有一些令人担忧的需要加以消除的不足之处。例如,螺帽必须埋入刀具孔内,以便对切屑流不致造成障碍,此点将使已经相对脆的切削刀具的特性进一步降低。此外,特别是由于刀具强度的降低,中心孔不能开得直径过大,这势必使螺栓直径也要相对较小。因此当不小心拧得过紧和过于用力时,往往会出现螺栓断裂的现象。换句话说,最大允许的螺栓直径制约着拧紧力的大小。
其另一缺点是,当精心制做新的结构件时,即非常频繁地更换刀具时,往往对螺帽的可操作性的要求将会构成复杂的并受到制约的因素。另一种情况是,当大量的切削刀具由动力驱动的采用预置的最大扭矩的旋紧器旋固时,则需要良好的可操作性。例如在对某些棒料剥皮切削时,需要更换大量的切削刀具并且用这种旋紧器的可操作性是不佳的。
故本发明的任务在于提出一种具有较大孔径的切削刀具,以便实现较大的紧固力。
本发明的另一任务在于改进旋紧锁固螺栓时的可操作性。
上述任务的解决方案是,采用一种非常简单的方式提出一种切削刀具,它由诸如渗碳硬质合金或陶瓷等相宜的硬质材料制成,用于对优选金属材料的切削加工,该刀具含有一个孔,该孔用于安装一个将刀具固定在刀杆上的锁紧螺栓,其特征是,所述孔全部或至少局部开有螺纹。
下面将对照附图对本发明做进一步的说明,附图在此仅为了便于理解,对本发明不具有限定作用。图中示出:
图1是本发明的切削刀具的固定装置的分解透视仰视图;
图2是本发明的切削刀具的另一固定的实施方式的透视俯视图;
图3是本发明的切削刀具的另一固定的实施方式;
图4是沿图3中A-A线的纵剖面图。
图1中用1标示切削刀具,其中也包括转位切削刀具,用2标示刀杆。切削刀具由一体构成。切削刀具的几何形状对本发明并不重要,只要其底部支持面3局部或全部特别平整,足以承受应力并保证稳定的切削定位。
刀杆2的结构对本发明也并不重要,这是因为对在附图中对其的表述可视为纯理论要点。如图1中的实施例所示,刀杆上具有一透孔4,该透孔用于安装锁紧螺栓5。锁紧螺栓帽6适用于埋入孔4内,该孔下部的直径做得较大。孔宜在整体上都是光滑的。但孔4也可以具有与螺栓的螺纹7配合的螺纹部分,螺栓旋入通过孔的螺纹并因而不会从孔4中有任何脱落。在此情况时,螺栓的无螺纹部分8的直径应稍小于螺纹7部分的直径,从而使之可以不受限制地在孔的螺纹内旋转。
本发明的重要特征在于,切削刀具的中心孔9内开有螺纹,以便使其可以被锁紧螺栓的螺纹7固定,刀具上的螺纹是在制造刀具的硬质合金材料上直接成形构成的。由于采用传统的挤压成型工艺是不可能加工这种螺纹的,因而采用已知喷射铸造工艺加工这种螺纹。该工艺是塑料工业制造不同零部件的一种通用的生产工艺。由热塑或热固聚合物构成的或含有这些聚合物的浆料被加热到相宜的温度并接着被挤压入模内,形成所需的几何形状。在粉末冶金中喷射铸造被用于加工相对复杂的由金属粉末制成的例如渗碳硬质合金粉末的零部件。渗碳硬质合金粉末而且与聚合物混合。在成形后将聚合物分离出来,此后采用与相应的模具冲压的零部件相同的方式对零部件烧结加固。利用在中间的螺纹丝锥成形的方式实现螺纹,在成开后将此丝锥旋出,或在烧结后将其烧除。
螺纹的类型对本发明并不重要。因此,中心孔可以具有各种不同的已知的螺纹,例如带有三角基本形状的V形螺纹(例如标准公制螺纹或所谓的M螺纹)、不同的管螺纹、梯形和方形螺纹,以及所谓的圆螺纹。此外,孔可以是锥形的,但最常见的是圆筒形的。锥形螺纹的优点在于,相应地只需稍许旋转,宜少于两圈,即可将螺纹旋入或松开。
中心孔9优选为一透孔,但也可以是一盲孔。在盲孔的情况时,对螺栓的长度势必要进行适配,以便在螺栓端部和孔底间留有足够的间隙。
如果说上述切削定位的可操作性是良好的,但也可以选用图2所示的结构。依照此实施例,切削刀具1’被一双螺纹反向螺栓固定。该螺栓具有两个螺纹部分11和12和一个在这两部分间的无螺纹部分13。这两个螺纹部分采用已知的方法开有反向螺纹。例如,当部分11具有左旋螺纹,而且在刀杆2’的孔也开有左旋螺纹时,螺纹部分12和刀具孔9’则开有右旋螺纹。通过将一相宜的旋紧装置插入孔14内对该反向螺栓进行旋转,该旋紧装置宜为六角形或为所谓的torx形。在此情况时,刀杆上的孔也可以是一个透孔,反向螺栓的另一端还可具有一相宜的凹口,该凹口用于从上方或从下方选择旋紧。
在图3和图4中还示出本发明的固定切削刀具的另一实施例。如图所示,锁紧螺栓15被锁紧垫片16旋转锁定,该垫片的外圆面上具有螺纹。刀杆具有一盲孔17,该盲孔至少在其上部具有用于旋固锁紧垫片16的螺纹。但在锁紧垫片旋入孔17内之前,螺栓要插入锁紧垫片的中心孔内,从而在锁紧垫片被螺纹固定之后螺栓的旋转被抑制。锁紧螺栓具有螺纹18,该螺纹应与锁紧垫片的螺纹反向。螺栓的端部具有一旋转——对称凹口19,该凹口用于紧固刀具(未示出),凹口19通常宜为六角形或所谓的torx形。必要时,在盲孔17的底部可开有一个其直径小于盲孔直径的孔并与盲孔同心,锁紧螺栓15的帽具有一实际上与孔19相同的旋转——非对称孔。采用此方式,可以从下面,也可以从上面旋转螺栓。
综上所述,本发明的其它优点也都是以如下事实为基础的,在调换切削刀具以及在对转位刀具旋转一新的切削刃时,可以把锁紧螺栓留在刀杆上。采用此方式就可不必对易于掉落和/或很难安装的小的松动的锁紧螺栓不时的校准或进行耗费时间的处理。

Claims (3)

1、切削刀具,由渗碳硬质合金制成,用于对优选金属材料的切削加工,该刀具含有一个孔(9,9′),该孔用于安装一个将刀具固定在刀杆上的锁紧螺栓,其特征在于:所述孔(9,9′)全部或至少局部开有螺纹并且在其上的螺纹直接在制成刀具的渗碳硬质合金上成形。
2、依照权利要求1的切削刀具,其特征在于:孔(9,9′)位于中心并且是透孔。
3、依照权利要求1或2的切削刀具,其特征在于:切削刀具是采用喷射铸造工艺制造的。
CN95193485A 1994-06-07 1995-05-26 具有中心螺纹孔的切削刀具 Expired - Lifetime CN1059138C (zh)

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Application Number Priority Date Filing Date Title
SE9401993A SE504338C2 (sv) 1994-06-07 1994-06-07 Skärplatta
SE9401993-2 1994-06-07
SE94019932 1994-06-07

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CN1150398A CN1150398A (zh) 1997-05-21
CN1059138C true CN1059138C (zh) 2000-12-06

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US (1) US5976455A (zh)
EP (1) EP0764067B1 (zh)
JP (1) JPH10502875A (zh)
KR (2) KR970703214A (zh)
CN (1) CN1059138C (zh)
AT (1) ATE179642T1 (zh)
CA (1) CA2191866C (zh)
DE (1) DE69509522T2 (zh)
PL (1) PL177358B1 (zh)
RU (1) RU2135330C1 (zh)
SE (1) SE504338C2 (zh)
WO (1) WO1995033590A1 (zh)

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CN102000845B (zh) * 2010-11-05 2012-09-05 株洲钻石切削刀具股份有限公司 平衡可调的切削刀具
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EP2808106B1 (en) * 2013-05-30 2019-11-06 Sandvik Intellectual Property AB Method for manufacturing a cutting insert
CN103806841A (zh) * 2013-11-06 2014-05-21 溧阳市江大技术转移中心有限公司 具有良好性能的石油勘探钻头的制造方法
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CN111098125B (zh) * 2020-02-27 2021-05-18 力锋精密工具(浙江)有限公司 一种硬质合金车刀刀头更换装置

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US5976455A (en) 1999-11-02
CA2191866A1 (en) 1995-12-14
KR970703214A (ko) 1997-07-03
SE9401993L (sv) 1995-12-08
DE69509522D1 (de) 1999-06-10
EP0764067B1 (en) 1999-05-06
KR200324401Y1 (zh) 2003-08-27
RU2135330C1 (ru) 1999-08-27
JPH10502875A (ja) 1998-03-17
SE9401993D0 (sv) 1994-06-07
SE504338C2 (sv) 1997-01-13
PL317469A1 (en) 1997-04-14
CA2191866C (en) 2005-08-23
CN1150398A (zh) 1997-05-21
ATE179642T1 (de) 1999-05-15
PL177358B1 (pl) 1999-11-30
WO1995033590A1 (en) 1995-12-14
DE69509522T2 (de) 1999-09-02
EP0764067A1 (en) 1997-03-26

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