US20140054951A1 - Cutting Tool With Insert Having A Tapered Bottom - Google Patents

Cutting Tool With Insert Having A Tapered Bottom Download PDF

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Publication number
US20140054951A1
US20140054951A1 US13/591,354 US201213591354A US2014054951A1 US 20140054951 A1 US20140054951 A1 US 20140054951A1 US 201213591354 A US201213591354 A US 201213591354A US 2014054951 A1 US2014054951 A1 US 2014054951A1
Authority
US
United States
Prior art keywords
cutting tool
insert
tapered
socket
tapered segment
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US13/591,354
Other languages
English (en)
Inventor
Paul A. Bookhamer
Chad A. Swope
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kennametal Inc
Original Assignee
Kennametal Inc
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 Kennametal Inc filed Critical Kennametal Inc
Priority to US13/591,354 priority Critical patent/US20140054951A1/en
Assigned to KENNAMETAL INC. reassignment KENNAMETAL INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BOOKHAMER, PAUL A., SWOPE, CHAD A.
Priority to AU2013206373A priority patent/AU2013206373A1/en
Priority to CN201310354693.XA priority patent/CN103628874A/zh
Priority to DE102013108996.8A priority patent/DE102013108996A1/de
Publication of US20140054951A1 publication Critical patent/US20140054951A1/en
Abandoned legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material

Definitions

  • the present invention relates to cutting tools for impinging a substrate in, for example, a mining or construction activity.
  • Cutting tools are used in conjunction with a machine used to break up (or cut) a substrate such as coal, rock, asphalt pavement, asphaltic concrete, concrete or the like.
  • a machine includes a driven member (e.g., a chain, a wheel or a drum), a holder either directly or indirectly mounted to the driven member, and a rotatable cutting tool rotatably held in the holder.
  • the cutting tool has a hard (e.g., cemented [cobalt] tungsten carbide) insert at the axial forward end thereof and is rotatably retained by the tool holder. It is the cutting tool and, more particularly the hard insert that impinges the substrate so as to break it into pieces upon impact.
  • the hard insert As well as the entire rotatable cutting tool, is subjected to great forces. These forces can destroy the cutting tool and/or the hard insert if they do not possess adequate strength and fracture toughness. Thus, it would be desirable if the design of the cutting tool and/or the hard insert would enhance the strength and fracture toughness thereof.
  • a cutting tool for use in impinging earth strata includes a cutting tool body with a central longitudinal axis and has a head portion at an axial forward end, a collar portion axially rearward of the head portion, and a shank portion axially rearward of the collar portion at an axial rearward end.
  • the cutting tool body contains a socket at the axial forward end thereof.
  • the cutting tool further includes an insert structured and arranged for being affixed to the cutting tool body within the socket, the insert having the same central longitudinal axis as the cutting tool body.
  • the insert includes a generally conical tip portion at an axial forward end of the insert, a central portion adjacent and axially rearward of the generally conical tip portion and a mounting end portion at an axial rearward end of the insert wherein the mounting end portion is adjacent and axially rearward of the central portion.
  • the mounting end portion includes a first tapered segment adjacent and axially rearward of the central portion, a second tapered segment adjacent and axially rearward of the first tapered segment wherein the second tapered segment has an axial rearward end diameter, and a base adjacent and axially rearward of the second tapered segment, the base having a base diameter that is greater than the axial rearward end diameter of the second tapered segment.
  • a cutting tool insert having a central longitudinal axis includes a generally conical tip portion at an axial forward end of the insert, a central portion adjacent and axially rearward of the generally conical tip portion and a mounting end portion at an axial rearward end of the insert wherein the mounting end portion is adjacent and axially rearward of the central portion.
  • the mounting end portion includes a first tapered segment adjacent and axially rearward of the central portion, a second tapered segment adjacent and axially rearward of the first tapered segment wherein the second tapered segment has an axial rearward end diameter, and a base adjacent and axially rearward of the second tapered segment, the base having a base diameter that is greater than the axial rearward end diameter of the second tapered segment.
  • a cutting tool body with a central longitudinal axis includes a head portion at an axial forward end of the cutting tool body, the head portion having a socket that defines an opening at the axial forward end.
  • the cutting tool body also includes a collar portion axially rearward of the head portion and a shank portion axially rearward of the collar portion at an axial rearward end.
  • the socket includes a first tapered wall adjacent and axially rearward of the opening, a second tapered wall adjacent and axially rearward of the first tapered wall, and a base portion adjacent and axially rearward of the second tapered wall.
  • FIG. 1 is a partial sectional side view of a cutting tool, in accordance with an aspect of the invention.
  • FIG. 2 is an enlarged side view of the cutting tool insert shown in FIG. 1 , in accordance with an aspect of the invention.
  • FIG. 3 is a partial sectional side view of the cutting tool body shown in FIG. 1 , in accordance with an aspect of the invention.
  • a cutting tool of the invention generally designated as 10 .
  • Exemplary cutting operations for the cutting tool 10 include, without limitation, road planing (or milling), coal mining, concrete cutting, and other kinds of cutting operations wherein a cutting tool with a hard cutting member impinges against a substrate (e.g., earth strata, pavement, asphaltic highway material, concrete, and the like) breaking the substrate into pieces of a variety of.
  • a substrate e.g., earth strata, pavement, asphaltic highway material, concrete, and the like
  • the cutting tool 10 of the invention may be manufactured in various sizes and dimensions depending upon the desired application of the tool.
  • cutting tool generally refers to rotatable cutting tools or indexable cutting tools that are generally fixed in place during use.
  • cutting tool 10 has a central longitudinal axis A-A. In one aspect, cutting tool 10 may be symmetrical about and/or rotate about the axis A-A.
  • Cutting tool 10 includes an elongate cutting tool body, generally designated as 12 , which typically is made of steel. Elongate cutting tool body 12 presents a generally cylindrical geometry, and has an axial forward end 14 and an axial rearward end 16 .
  • Elongate cutting tool body 12 includes a head portion 18 , a shank portion 20 and a collar portion 22 wherein the collar portion 22 is mediate of and contiguous with the head portion 18 and the collar portion 22 .
  • the collar portion 22 is axially rearward of the head portion 18 and the shank portion 20 is axially rearward of the collar portion 22 .
  • the shank portion 20 includes an annular groove 24 adjacent the axial rearward end 16 for receiving a retainer ring (not shown), as is generally known.
  • the head portion 18 contains a socket 28 at the axial forward end 14 of the cutting tool body 12 .
  • the socket defines an opening 30 at the axial forward end 14 of the cutting tool body 12 .
  • the socket 28 includes a first tapered wall 32 adjacent and axially rearward of the opening 30 , a second tapered wall 34 adjacent and axially rearward of the first tapered wall 32 , and a base portion 36 adjacent and axially rearward of the second tapered wall 34 .
  • the second tapered wall 34 of the socket 28 has an axial rearward diameter D 1 , i.e. the diameter at the most axially rearward portion of the second tapered wall 34 where the second tapered wall 34 meets the base portion 36 .
  • the base portion 36 of the socket 28 has a base portion diameter, e.g. D 2 . In one aspect, the base portion diameter D 2 is greater than the axial rearward diameter D 1 .
  • the first tapered wall 32 of the socket 28 tapers generally inwardly toward the axial rearward end 16 of the cutting tool body 12 .
  • the first tapered wall 32 tapers at a first angle W from the central longitudinal axis A-A.
  • the second tapered wall 34 of the socket 28 tapers generally inwardly toward the axial rearward end 16 of the cutting tool body 12 .
  • the second tapered wall 34 tapers at a second angle X from the central longitudinal axis A-A.
  • the first angle W of the first tapered wall 32 is different from the second angle X of the second tapered wall 34 .
  • the cutting tool 10 further includes a hard cutting member or hard cutting insert, generally designated as 40 .
  • the insert 40 is structured and arranged for being affixed by, for example, brazing within the socket 28 at the axial forward end 14 of the cutting tool body 12 .
  • the insert When affixed to the cutting tool body 12 , the insert has essentially the same central longitudinal axis A-A as the cutting tool body 12 .
  • the insert 40 includes an axial forward end 42 and an axial rearward end 44 .
  • Insert 40 may be made from, for example, a hard material such as, for example, cemented (cobalt) tungsten carbide.
  • the insert 40 includes a generally conical tip portion 46 at or adjacent the axial forward end 42 of the insert 40 , a central portion 48 adjacent to and axially rearward of the generally conical tip portion 46 and a mounting end portion 50 at the axial rearward end 44 of the insert 40 .
  • the mounting end portion 50 is adjacent and axially rearward of the central portion 48 .
  • the mounting end portion 50 of the insert 40 includes a first tapered segment 52 adjacent to and axially rearward of the central portion 48 , a second tapered segment 54 adjacent to and axially rearward of the first tapered segment 52 and a base 56 adjacent to and axially rearward of the second tapered segment 54 .
  • the second tapered segment 54 has an axial rearward end diameter D 3 , i.e. the diameter at the most axially rearward portion of the second tapered segment 54 where the second tapered segment 54 meets the base 56 .
  • the base 56 has a base diameter, e.g. D 4 . In one aspect, the base diameter D 4 is greater than the axial rearward end diameter D 3 of the second tapered segment 54 .
  • the first tapered segment 52 of the insert 40 tapers generally inwardly toward the axial rearward end 44 of the insert 40 .
  • the first tapered segment 52 tapers at a first angle Y from the central longitudinal axis A-A.
  • the second tapered segment 54 of the insert 40 tapers generally inwardly toward the axial rearward end 44 of the insert 40 .
  • the second tapered segment 54 tapers at a second angle Z from the central longitudinal axis A-A.
  • the first angle Y of the first tapered segment 52 is different from the second angle Z of the second tapered segment 54 .
  • FIG. 1 illustrates the insert 40 as positioned or affixed in place in the socket 28 of the cutting tool body 12 .
  • the first tapered wall 32 of the socket 28 is structured and arranged for cooperating with the first tapered segment 52 of the insert 40 .
  • the second tapered wall 34 of the socket 28 is structured and arranged for cooperating with the second tapered segment 54 of the insert 40 .
  • the base portion 36 of the socket 28 is structured and arranged for cooperating with the base 56 of the insert 40 .
  • the base 56 of the insert 40 and the base portion 36 of the socket 28 are structured and arranged to have sufficient dimensional tolerances so that the base 56 of the insert 40 can be inserted into the base portion 36 of the socket 28 .
  • first tapered segment 52 and, in particular, the second tapered segment 54 results in less material being removed from the socket 28 which in turn strengthens the surrounding steel material of the head portion 18 of the cutting tool body 12 which supports the insert 40 thus reducing the possibility of the insert 40 fracturing and/or reducing the possibility of steel fatigue in the head portion 18 of the cutting tool body 12 so as to prevent catastrophic failure of the cutting tool 10 .
  • the base portion 36 of the socket 28 in association with the base 56 and the tapered segments 52 and 54 are structured and arranged to allow additional brazing material to flow and form around the insert 40 mounting end portion 50 resulting in a stronger bonding between the insert 40 and the socket 28 .
  • the base 56 is structured and arranged to provide added material to the insert 40 at a location where maximum equivalent loading occurs during the impact cycle of the cutting tool 10 and to provide longer lasting wear protection to the cutting tool body 18 as the tool reaches its final life cycle under abrasive cutting conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Milling Processes (AREA)
  • Earth Drilling (AREA)
US13/591,354 2012-08-22 2012-08-22 Cutting Tool With Insert Having A Tapered Bottom Abandoned US20140054951A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US13/591,354 US20140054951A1 (en) 2012-08-22 2012-08-22 Cutting Tool With Insert Having A Tapered Bottom
AU2013206373A AU2013206373A1 (en) 2012-08-22 2013-06-17 Cutting tool with insert having a tapered bottom
CN201310354693.XA CN103628874A (zh) 2012-08-22 2013-08-15 切削刀具、切削刀具镶件及切削刀具本体
DE102013108996.8A DE102013108996A1 (de) 2012-08-22 2013-08-20 Schneidwerkzeug mit Einsatz mit konisch zulaufendem Unterteil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/591,354 US20140054951A1 (en) 2012-08-22 2012-08-22 Cutting Tool With Insert Having A Tapered Bottom

Publications (1)

Publication Number Publication Date
US20140054951A1 true US20140054951A1 (en) 2014-02-27

Family

ID=50069719

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/591,354 Abandoned US20140054951A1 (en) 2012-08-22 2012-08-22 Cutting Tool With Insert Having A Tapered Bottom

Country Status (4)

Country Link
US (1) US20140054951A1 (zh)
CN (1) CN103628874A (zh)
AU (1) AU2013206373A1 (zh)
DE (1) DE102013108996A1 (zh)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150198040A1 (en) * 2014-01-13 2015-07-16 Sandvik Intellectual Property Ab Cutting pick tool
US20170165760A1 (en) * 2015-08-13 2017-06-15 Kennametal Inc. Setting System and Tool
USD818507S1 (en) 2017-02-28 2018-05-22 Kennametal Inc Replaceable tip for a rotatable cutting tool
US10195766B2 (en) * 2015-05-07 2019-02-05 Epiroc Drilling Tools Aktiebolag Cutting tool
USD839936S1 (en) 2016-05-24 2019-02-05 Kennametal Inc. Cutting insert and bolster
US10294786B2 (en) * 2016-05-24 2019-05-21 Kennametal Inc. Rotatable cutting tool with cutting insert and bolster

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106150386A (zh) * 2015-04-10 2016-11-23 阳谷夏工精锻有限公司 耐磨型旋挖钻截齿

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020066600A1 (en) * 2000-12-01 2002-06-06 Dvorachek Harold A. Rotary tools or bits
US7837277B2 (en) * 2005-08-22 2010-11-23 Sandvik Intellectual Property Ab Rotary cutting pick

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020066600A1 (en) * 2000-12-01 2002-06-06 Dvorachek Harold A. Rotary tools or bits
US7837277B2 (en) * 2005-08-22 2010-11-23 Sandvik Intellectual Property Ab Rotary cutting pick

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150198040A1 (en) * 2014-01-13 2015-07-16 Sandvik Intellectual Property Ab Cutting pick tool
US9605538B2 (en) * 2014-01-13 2017-03-28 Sandvik Intellectual Property Ab Cutting pick tool
US10195766B2 (en) * 2015-05-07 2019-02-05 Epiroc Drilling Tools Aktiebolag Cutting tool
US20170165760A1 (en) * 2015-08-13 2017-06-15 Kennametal Inc. Setting System and Tool
US9999928B2 (en) * 2015-08-31 2018-06-19 Kennametal Inc. Setting system and tool
USD839936S1 (en) 2016-05-24 2019-02-05 Kennametal Inc. Cutting insert and bolster
US10294786B2 (en) * 2016-05-24 2019-05-21 Kennametal Inc. Rotatable cutting tool with cutting insert and bolster
USD818507S1 (en) 2017-02-28 2018-05-22 Kennametal Inc Replaceable tip for a rotatable cutting tool

Also Published As

Publication number Publication date
AU2013206373A1 (en) 2014-03-13
CN103628874A (zh) 2014-03-12
DE102013108996A1 (de) 2014-02-27

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Legal Events

Date Code Title Description
AS Assignment

Owner name: KENNAMETAL INC., PENNSYLVANIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BOOKHAMER, PAUL A.;SWOPE, CHAD A.;REEL/FRAME:028826/0658

Effective date: 20120816

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION