EP3524774A1 - Nouveau pic de coupe - Google Patents

Nouveau pic de coupe Download PDF

Info

Publication number
EP3524774A1
EP3524774A1 EP17857782.1A EP17857782A EP3524774A1 EP 3524774 A1 EP3524774 A1 EP 3524774A1 EP 17857782 A EP17857782 A EP 17857782A EP 3524774 A1 EP3524774 A1 EP 3524774A1
Authority
EP
European Patent Office
Prior art keywords
cutting pick
cutting
tooth
upper portion
peg
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.)
Withdrawn
Application number
EP17857782.1A
Other languages
German (de)
English (en)
Other versions
EP3524774A4 (fr
Inventor
Gang Yang
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3524774A1 publication Critical patent/EP3524774A1/fr
Publication of EP3524774A4 publication Critical patent/EP3524774A4/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • E21C35/19—Means for fixing picks or holders
    • E21C35/197—Means for fixing picks or holders using sleeves, rings or the like, as main fixing elements
    • 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
    • E21C35/1831—Fixing methods or devices
    • 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
    • E21C35/1837—Mining picks; Holders therefor with inserts or layers of wear-resisting material characterised by the shape

Definitions

  • the present invention relates to the field of roadway excavation machines, coal winning machines, shield machines and rotary drilling rigs, and specifically to a new cutting pick.
  • the cutting head is a main part in the excavation machines, combined mining machines, shield machines and rotary drilling rigs.
  • the cutting pick is fixed, via a tooth seat, onto the cutting head.
  • the cutting pick generally uses a hard alloy tooth tip (called as the hard alloy cutting pick), generally in a shape of a circular cone, and is directly fixed onto the respective base seat.
  • the cutting head as the main stressed part, cuts rocks by the cutting pick in an impacting manner.
  • a traditional cutting pick is composed of two portions: the hard alloy tooth head and the cutting pick body which are generally connected together into one piece by the high temperature welding or hot-pressing technology, with copper as the welding material.
  • the high temperature will affect the component structure in the hard alloy and decrease the strength, wear resistance and impact resistance of the cutting pick, thus reducing the service life of the cutting pick. Therefore, there is a need for a cutting pick having better impact resistant strength and wear resistance in production.
  • a new cutting pick is provided according to the present invention which is high in impact resistance and in wear resistance.
  • a new cutting pick comprising a body, a cutting tooth (1) provided on the body, and a circular frustum peg (2); wherein the cutting tooth (1) is a polycrystalline diamond composite tooth and consists of a polycrystalline diamond composite layer (12) and a hard alloy base seat (13); the polycrystalline diamond composite layer (12) of the cutting tooth, as the cutting tooth of the cutting pick, extends out of the body of the cutting pick; the body of the cutting pick comprises a body upper portion (4) and a body lower portion (5).
  • the body upper portion is provided therein with a hollow structure which is embedded with the cutting tooth part (1) as well as the circular frustum peg (2); the body upper portion is provided at its top with a cone hole (8); the hard alloy base seat (13) of the cutting tooth, the circular frustum peg (2), and the cone hole (8) provided at the top of the body upper portion are connected by interference fit.
  • body upper portion (4) and the body lower portion (5) are interconnected together by a screw thread (6).
  • a welding groove (7) is provided at the site of the interconnection which is connected together by performing welding to the welding groove, thus forming an integral structure.
  • the body lower portion (5) is provided at its top with a connecting push rod (9) which is in contact with the hard alloy base seat (13) of the cutting tooth and the circular frustum peg (2).
  • the body lower portion (5) is provided at its bottom with a clip spring groove (10) which is held to the base seat of the cutting pick.
  • the body upper portion is provided at its wearing area with a wear resistant layer (3); the wear resistant layer is formed by surfacing welding a tungsten carbide welding rod to the wearing area of the body of the cutting pick using the argon arc welding technology, and is all coated onto the surface of the body.
  • the wear resistant layer (3) on the body upper portion of the cutting pick is welded in a ring shape, wherein the tungsten carbide layer by surfacing welding is added layer by layer in an axial direction of the body, with its thickness increasing accordingly in a direction perpendicular to the axial direction of the body.
  • the body of the cutting pick is rotationally connected with a tooth seat center.
  • the body lower portion is provided at its middle portion with a cylindrical platform (11) which is located below the screw thread of the body lower portion.
  • the effect(s) of welding or hot-pressing on the polycrystalline diamond cutting teeth can be avoided, the impact resistance and the wear resistance of the diamond composite teeth can be significantly improved, and the wear resistant layer added to the wearing area of the cutting pick can improve the wear resistance of the cutting pick and provide excellent support to the diamond composite teeth.
  • the new cutting pick comprises: a body, a cutting tooth part provided and a circular frustum peg (2) on the body; wherein the cutting tooth part comprises a polycrystalline diamond composite layer (12) and a hard alloy base seat (13); the body of the cutting pick comprises a body upper portion (4) and a body lower portion (5), the body upper portion is provided therein with a hollow structure which is embedded with the cutting tooth part as well as the circular frustum peg (2), and in addition, the body upper portion is provided at its top with a cone hole (8); the polycrystalline diamond composite layer (12) of the cutting tooth, as the cutting tooth of the cutting pick, is higher than the body.
  • the hard alloy base seat (13) of the cutting tooth, the circular frustum peg (2) as shown, and the cone hole (8) provided at the top of the body upper portion are connected together by interference fit.
  • the body upper portion (4) and the body lower portion (5) are interconnected together by a screw thread.
  • the body upper portion is provided with an inner screw thread and the body lower portion is provided with an outer screw thread.
  • the body lower portion is provided at its top with a connecting push rod (9) which presses against the bottom of the hard alloy base seat (13) of the cutting tooth and the bottom of the circular frustum peg ( figure 4 ).
  • a welding groove (7) is provided at the site of the interconnection which is connected together by performing welding to the welding groove, thus forming an integral structure.
  • the body lower portion is provided at its bottom with a clip spring groove (10) which is connected to the base seat of the cutting pick, wherein the body of the cutting pick is rotationally connected with a tooth seat center.
  • the hard alloy base seat (13) of the cutting tooth and the circular frustum peg (2) are secured into the cone hole by the pretension force of the screw threads of the body upper portion and the body lower portion as well as the cooperation with the connecting push rod (9); and then the interconnection site of the upper and lower bodies of the cutting pick for pretension is welded.
  • Such improvement results in that the effect(s) of high temperature during welding or hot-pressing on the bonded structure between the diamond composite layer and the alloy base seat of the polycrystalline diamond cutting teeth can be avoided, and thus the impact resistance and the wear resistance of the new diamond composite can be significantly improved such that it can be applied to coal seam or rock stratum mining, to replace the hard alloy.
  • the cutting tooth comprises the polycrystalline diamond composite layer (12) and the hard alloy base seat (13), the hard alloy base seat (13) is engaged and secured to the cone hole of the body upper portion of the cutting pick by the circular frustum peg ( figure 4 ), and during assembling of angle a, the circular cone face and the inner side face of the circular frustum peg ( figure 4 ) are completely secured and engaged.
  • the polycrystalline diamond composite tooth is used as an excavation tool for cutting rocks, to replace the hard alloy tooth tip.
  • At least a portion of the body upper portion is provided with a wear resistant layer (3) which is welded in a ring shape.
  • the wear resistant layer is coated onto the surface of the wearing area on the body of the cutting pick.
  • the wear resistant layer is formed by surfacing welding a tungsten carbide welding rod to the wearing area of the body of the cutting pick using the argon arc welding technology.
  • a dedicated clamping tool is used to rotate the body of the cutting pick and also the tungsten carbide welding rod is surfacing-welded using the argon arc welding, wherein the body is preheated before welding and is processed by heat preservation measures after welding.
  • the wear resistant effect of the wearing area of the body can be improved.
  • the peg is in a circular frustum shape which is provided on its circumference with a through groove 14 by machining.
  • the circular coning platform face at the bottom of the hard alloy base seat (13) and the inner side face of the circular frustum peg ( figure 4 ) are completely secured and engaged, and the outer side face of the circular frustum peg and the circular cone face (8) of the body upper portion are completely engaged and secured.
  • the polycrystalline diamond cutting tooth may be made from the prior diamond composite materials.
  • the cutting tooth having a reasonable size is produced according to the requirements of design parameters, and it is formed by putting the diamond powder and the adhesive onto the hard alloy and then performing sintering under high temperature and high pressure.
  • the body lower portion is provided at its middle portion with a cylindrical platform (11) which is located below the screw thread of the body lower portion.
  • the polycrystalline diamond composite tooth is used as the cutting tooth of the cutting pick.
  • the improved cutting pick uses the screw thread to fasten the cutting tooth as well as the circular frustum peg into the fitting cone hole of the body.
  • the wear resistant layer is added to the wearing area of the cutting pick such that the impact resistance and the wear resistance of the cutting pick are improved.
  • the body of the cutting pick can provide excellent support to the new diamond composite teeth.
  • the diamond composite tooth is used as an excavation tool for cutting rocks, to replace the hard alloy tooth.

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)
  • Earth Drilling (AREA)
EP17857782.1A 2016-10-09 2017-07-07 Nouveau pic de coupe Withdrawn EP3524774A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610877452.7A CN106351657A (zh) 2016-10-09 2016-10-09 一种新型截齿
PCT/CN2017/092134 WO2018064901A1 (fr) 2016-10-09 2017-07-07 Nouveau pic de coupe

Publications (2)

Publication Number Publication Date
EP3524774A1 true EP3524774A1 (fr) 2019-08-14
EP3524774A4 EP3524774A4 (fr) 2020-06-17

Family

ID=57866208

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17857782.1A Withdrawn EP3524774A4 (fr) 2016-10-09 2017-07-07 Nouveau pic de coupe

Country Status (3)

Country Link
EP (1) EP3524774A4 (fr)
CN (1) CN106351657A (fr)
WO (1) WO2018064901A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106351657A (zh) * 2016-10-09 2017-01-25 杨岗 一种新型截齿
WO2020109207A1 (fr) * 2018-11-27 2020-06-04 Element Six Gmbh Outil de piquage pour le fraisage des routes
CN112696206A (zh) * 2020-12-29 2021-04-23 北京城建轨道交通建设工程有限公司 一种旋挖钻机用截齿

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129853A (en) * 1982-11-08 1984-05-23 Wimet Mining Limited Cutter picks and pick mounting arrangements
US4804231A (en) * 1985-06-24 1989-02-14 Gte Laboratories Incorporated Point attack mine and road milling tool with replaceable cutter tip
DE102005001535B3 (de) * 2005-01-13 2006-08-31 Betek Bergbau- Und Hartmetalltechnik Karl-Heinz Simon Gmbh & Co. Kg Befestigungsanordnung für einen Meißel und Demontagewerkzeug
CN201367905Y (zh) * 2009-01-19 2009-12-23 邵祥顺 一种碗形片状硬岩锥形截齿
CN201420554Y (zh) * 2009-05-19 2010-03-10 牛之平 一种合金护基截齿
GB201215555D0 (en) * 2012-08-31 2012-10-17 Element Six Gmbh Pick assembly, bit assembly and degradation tool
CN202991038U (zh) * 2012-09-12 2013-06-12 杨岗 一种加强型截齿
CN103009001B (zh) * 2012-12-20 2015-06-10 河南省煤科院耐磨技术有限公司 一种冷装配低截割阻力耐磨镐型截齿生产方法
CN203347793U (zh) * 2013-04-16 2013-12-18 黑龙江科技学院 具有非圆弧圆锥面硬质合金头和弹性功能结构的镐型截齿
CN203441492U (zh) * 2013-07-31 2014-02-19 杨岗 一种加强型截齿
CN203925495U (zh) * 2014-05-30 2014-11-05 无锡正大轴承机械制造有限公司 采煤机用缓冲式无焊接镐型截齿
CN104500063B (zh) * 2014-12-07 2017-07-14 江西耀升钨业股份有限公司 一种低钴超粗晶硬质合金截齿及其制造方法
CN204402493U (zh) * 2015-01-13 2015-06-17 河南博瑞克矿山机械有限公司 一种开岩石层用截齿
CN204646233U (zh) * 2015-04-09 2015-09-16 山东天工岩土工程设备有限公司 一种加强耐磨型刀座
CN205154160U (zh) * 2015-11-06 2016-04-13 盐城澳斯科特矿用设备有限公司 一种带硬质合金的截齿
CN105333261B (zh) * 2015-11-25 2017-07-18 南京晨光复合管工程有限公司 一种螺栓紧固式海洋用高压rtp接头及其装配方法
CN106351657A (zh) * 2016-10-09 2017-01-25 杨岗 一种新型截齿
CN206513367U (zh) * 2016-10-09 2017-09-22 杨岗 一种新型截齿

Also Published As

Publication number Publication date
CN106351657A (zh) 2017-01-25
EP3524774A4 (fr) 2020-06-17
WO2018064901A1 (fr) 2018-04-12

Similar Documents

Publication Publication Date Title
EP3524774A1 (fr) Nouveau pic de coupe
CN202073564U (zh) 一种新型截齿
US11230925B2 (en) Pick tool for road milling
CN204646234U (zh) 一种高耐磨矿用截齿
AU2018100703A4 (en) New cutting pick
CN110145239B (zh) 钻探用镶齿、牙轮钻头及钻探用镶齿的加工方法
CN206513367U (zh) 一种新型截齿
US20130187438A1 (en) Pick with Hardened Core Assembly
CN104963632B (zh) 一种能够预防脱齿的固定切削齿钻头
CA2995654A1 (fr) Outil d'extraction asymetrique avec un rapport de forme entre les bords d'attaque et de fuite
KR20210094524A (ko) 터널 보링 머신용 디스크 커터 및 이의 제조 방법
CN104854299A (zh) 岩石钻头钻尖和岩石钻头
CN204212777U (zh) 加强型旋挖机截齿
CN212177130U (zh) 一种金刚石截齿、巷道掘进机、采煤机、盾构机
CN202991038U (zh) 一种加强型截齿
CN106854993A (zh) 双金属滚刀刀圈
CN214944236U (zh) 一种内嵌式锋利截齿
CN110560866A (zh) 一种金刚石截齿及其生产方法
CN205314922U (zh) 一种刀翼式复合钻头
CN205154173U (zh) 双金属滚刀刀圈
EP3891360B1 (fr) Outil de piquage pour fraisage de chaussée
CN204511441U (zh) 一种防脱头耐磨截齿
US9441482B2 (en) Hammer element on a degradation pick
CN214886868U (zh) 一种复合齿
CN220036660U (zh) 齿头具有金属陶瓷复合耐磨层的截齿

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20180628

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

A4 Supplementary search report drawn up and despatched

Effective date: 20200515

RIC1 Information provided on ipc code assigned before grant

Ipc: E21C 35/183 20060101AFI20200511BHEP

Ipc: E21C 35/197 20060101ALI20200511BHEP

18W Application withdrawn

Effective date: 20200515