PL444775A1 - Tangential-rotary combine harvester knife with increased resistance to breakage and method of increasing the knife's resistance to breakage - Google Patents

Tangential-rotary combine harvester knife with increased resistance to breakage and method of increasing the knife's resistance to breakage

Info

Publication number
PL444775A1
PL444775A1 PL444775A PL44477523A PL444775A1 PL 444775 A1 PL444775 A1 PL 444775A1 PL 444775 A PL444775 A PL 444775A PL 44477523 A PL44477523 A PL 44477523A PL 444775 A1 PL444775 A1 PL 444775A1
Authority
PL
Poland
Prior art keywords
knife
reinforcing sleeve
breakage
tangential
resistance
Prior art date
Application number
PL444775A
Other languages
Polish (pl)
Other versions
PL248778B1 (en
Inventor
Piotr Cheluszka
Jarosław Mikuła
Marek Sroka
Stanisław Mikuła
Original Assignee
Politechnika Śląska
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 Politechnika Śląska filed Critical Politechnika Śląska
Priority to PL444775A priority Critical patent/PL248778B1/en
Publication of PL444775A1 publication Critical patent/PL444775A1/en
Publication of PL248778B1 publication Critical patent/PL248778B1/en

Links

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
    • E21C35/19—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
    • 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
    • E21C35/193—Means for fixing picks or holders using bolts as main fixing elements
    • E21C35/1933—Means for fixing picks or holders using bolts as main fixing elements the picks having a cylindrical shank

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)
  • Heat Treatment Of Articles (AREA)
  • Harvester Elements (AREA)

Abstract

Styczno-obrotowy nóż kombajnowy wyposażony w tuleję wzmacniającą osadzoną na trzonku noża oraz nakrętkę nakręconą na tylny jego koniec charakteryzuje się tym, że tuleja wzmacniająca (2) na dolnym odcinku o długości l w zakresie od 15% do 30% całkowitej jej długości L osadzona jest na trzonku noża (1) z pasowaniem wtłaczanym, natomiast na pozostałej części osadzona jest na trzonku noża (1) z pasowaniem suwliwym. Sposób zwiększenia odporności styczno-obrotowego noża kombajnowego na złamanie polega na tym, że tuleję wzmacniającą (2) hartuje się indukcyjnie za pomocą przemieszczającego się wzdłuż niej induktora (5) wraz z przewodem chłodzącym (8) i osłoną (6) od dolnego końca tulei wzmacniającej (2) do jej kołnierza, przy czym na układ: tuleja wzmacniająca (2) — trzonek noża (1) posadowiony na pierścieniu (7) wywierany jest wzdłużny nacisk siłą P<sub>2</sub> za pomocą stempla (3), zaś po schłodzeniu na gwintowaną część trzonka noża (1) nakładana jest nakrętka zabezpieczona zgrzeiną lub spoiną punktową, utrwalająca stan naprężeń własnych ściskających σ<sub>c</sub> w tulei wzmacniającej (2).A tangential-rotary combine knife equipped with a reinforcing sleeve mounted on the knife shank and a nut screwed onto its rear end is characterized in that the reinforcing sleeve (2) on the lower section with a length l in the range of 15% to 30% of its total length L is mounted on the knife shank (1) with a press fit, while on the remaining part it is mounted on the knife shank (1) with a sliding fit. The method of increasing the resistance of a tangential-rotary combine knife to breakage consists in inductively hardening the reinforcing sleeve (2) by means of an inductor (5) moving along it together with a cooling pipe (8) and a cover (6) from the lower end of the reinforcing sleeve (2) to its collar, whereby the system: reinforcing sleeve (2) — knife shank (1) mounted on the ring (7) is subjected to longitudinal pressure of force P<sub>2</sub> by means of a punch (3), and after cooling, a nut secured by a weld or a spot weld is put on the threaded part of the knife shank (1), which fixes the state of compressive residual stresses σ<sub>c</sub> in the reinforcing sleeve (2).

PL444775A 2023-05-02 2023-05-02 Tangential-rotary combine harvester knife with increased resistance to breakage and method of increasing the knife's resistance to breakage PL248778B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL444775A PL248778B1 (en) 2023-05-02 2023-05-02 Tangential-rotary combine harvester knife with increased resistance to breakage and method of increasing the knife's resistance to breakage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL444775A PL248778B1 (en) 2023-05-02 2023-05-02 Tangential-rotary combine harvester knife with increased resistance to breakage and method of increasing the knife's resistance to breakage

Publications (2)

Publication Number Publication Date
PL444775A1 true PL444775A1 (en) 2024-11-04
PL248778B1 PL248778B1 (en) 2026-01-26

Family

ID=93336964

Family Applications (1)

Application Number Title Priority Date Filing Date
PL444775A PL248778B1 (en) 2023-05-02 2023-05-02 Tangential-rotary combine harvester knife with increased resistance to breakage and method of increasing the knife's resistance to breakage

Country Status (1)

Country Link
PL (1) PL248778B1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002095190A1 (en) * 2001-05-23 2002-11-28 Sandvik Ab; (Publ) Rotatable cutting bit and retainer sleeve therefor
WO2010014327A2 (en) * 2008-07-28 2010-02-04 Kennametal Inc. Cutting bit for mining and excavating tools
PL437282A1 (en) * 2018-09-12 2021-11-29 Joy Global Underground Mining Llc Sleeve retention for cutting pick assembly
PL436692A1 (en) * 2021-01-18 2022-07-25 Politechnika Śląska Tangential-rotary pick with increased fracture resistance
PL243141B1 (en) * 2021-03-19 2023-07-03 Politechnika Slaska Im Wincent Tangential-rotating knife for cutting hard rocks
US11719098B2 (en) * 2021-09-10 2023-08-08 Kennametal Inc. Tool retainer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002095190A1 (en) * 2001-05-23 2002-11-28 Sandvik Ab; (Publ) Rotatable cutting bit and retainer sleeve therefor
WO2010014327A2 (en) * 2008-07-28 2010-02-04 Kennametal Inc. Cutting bit for mining and excavating tools
PL437282A1 (en) * 2018-09-12 2021-11-29 Joy Global Underground Mining Llc Sleeve retention for cutting pick assembly
PL436692A1 (en) * 2021-01-18 2022-07-25 Politechnika Śląska Tangential-rotary pick with increased fracture resistance
PL243141B1 (en) * 2021-03-19 2023-07-03 Politechnika Slaska Im Wincent Tangential-rotating knife for cutting hard rocks
US11719098B2 (en) * 2021-09-10 2023-08-08 Kennametal Inc. Tool retainer

Also Published As

Publication number Publication date
PL248778B1 (en) 2026-01-26

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