CN2741706Y - 一种防断丝锥 - Google Patents

一种防断丝锥 Download PDF

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Publication number
CN2741706Y
CN2741706Y CNU2004201109272U CN200420110927U CN2741706Y CN 2741706 Y CN2741706 Y CN 2741706Y CN U2004201109272 U CNU2004201109272 U CN U2004201109272U CN 200420110927 U CN200420110927 U CN 200420110927U CN 2741706 Y CN2741706 Y CN 2741706Y
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China
Prior art keywords
tap
taper shank
screw tap
recess
cone
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Expired - Fee Related
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CNU2004201109272U
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English (en)
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徐祎
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G5/00—Thread-cutting tools; Die-heads
    • B23G5/02—Thread-cutting tools; Die-heads without means for adjustment
    • B23G5/06—Taps
    • B23G5/064—Taps with weakened shank portion

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Abstract

一种防断丝锥，包括锥柄和锥体，其中锥体的头部设有导向柱，锥柄上开设凹槽，在凹槽位置，锥柄的横截面积小于锥体的横截面积。锥体头部的导向柱起定位作用，保证丝锥与孔保持同心，使之攻丝时受力均匀，防止折断；另外，当由于其他原因造成意外折断，由于应力集中于凹槽位置，控制丝锥断在该处，保证留有一定长度的锥柄，方便了取出。

Description

一种防断丝锥
所属技术领域
本实用新型涉及机械加工用的刃具，是一种丝锥。
背景技术
制造内螺纹时，需要用丝锥进行攻丝。如果丝锥与工件的加工孔不同心，会造成受力不均匀，导致丝锥折断。另外，有时因为材料原因或孔径大小不对，以及丝锥本身刃口钝等因素，容易造成丝锥折断。丝锥断时，由于应力集中在工件的孔口，所以常在孔口位置折断，取出困难。
发明内容
本实用新型目的在于提供一种不易折断的丝锥，另外在意外折断时，控制其折断位置，以方便取出。
本实用新型的方案是：一种防断丝锥，包括锥柄和锥体，其中锥体的头部设有导向柱，锥柄上开设凹槽，在凹槽位置，锥柄的横截面积小于锥体的横截面积。
本实用新型的优点是：锥体头部的导向柱先于锥体插入加工孔中，起定位作用，保证丝锥与孔保持同心，使之攻丝时受力均匀，防止折断；另外，当由于其他原因造成意外折断，由于应力集中于凹槽位置，控制丝锥断在该处，保证留有一定长度的锥柄，方便了取出。
附图说明
下面根据附图和实施例对本实用新型作进一步说明。
附图是本实用新型结构图。
图中1锥柄，2凹槽，3锥体，4导向柱。
具体实施方式
如图所示，防断丝锥，包括锥柄1和锥体3，其中锥体3的头部设有导向柱4，锥柄1上开设凹槽2。
在凹槽位置，锥柄1的横截面积小于锥体3的横截面积，以使该部位比锥体3易于折断，即当发生折断时，使丝锥断于凹槽2处，由于使用时该部位一般都是高于加工孔的孔口，因而避免了丝锥断在孔口，方便了断丝锥的取出。
导向柱4的直径比加工孔略小，如M6的丝锥，加工孔一般为5.2，则导向柱4直径采用5.1，以达到丝锥与孔保持同心的效果。
在使用时，导向柱4先于锥体3插入加工孔中，起定位作用，保证丝锥与孔保持同心，使之攻丝时受力均匀，可防止折断。

Claims (2)

1.一种防断丝锥，包括锥柄(1)和锥体(3)，其特征是：锥体(3)的头部设有导向柱(4)，锥柄(1)上开设凹槽(2)。
2.如权利要求1所述的防断丝锥，其特征是：在所述的凹槽(2)位置，锥柄(1)的横截面积小于锥体(3)的横截面积。
CNU2004201109272U 2004-11-17 2004-11-17 一种防断丝锥 Expired - Fee Related CN2741706Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2004201109272U CN2741706Y (zh) 2004-11-17 2004-11-17 一种防断丝锥

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2004201109272U CN2741706Y (zh) 2004-11-17 2004-11-17 一种防断丝锥

Publications (1)

Publication Number Publication Date
CN2741706Y true CN2741706Y (zh) 2005-11-23

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ID=35477180

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2004201109272U Expired - Fee Related CN2741706Y (zh) 2004-11-17 2004-11-17 一种防断丝锥

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CN (1) CN2741706Y (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2010202839B1 (en) * 2009-11-13 2011-03-24 Simon Dean Gischus Machine Tool Bit
WO2011057328A1 (en) * 2009-11-13 2011-05-19 Simon Dean Gischus Machine tool bit design

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2010202839B1 (en) * 2009-11-13 2011-03-24 Simon Dean Gischus Machine Tool Bit
WO2011057328A1 (en) * 2009-11-13 2011-05-19 Simon Dean Gischus Machine tool bit design
CN102712052A (zh) * 2009-11-13 2012-10-03 西蒙·迪恩·杰胜斯 机床刀具设计
CN102712052B (zh) * 2009-11-13 2014-07-23 西蒙·迪恩·杰胜斯 机床刀具设计

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C19 Lapse of patent right due to non-payment of the annual fee
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