PL423676A1 - Method for making the Rd 50x7 thread on a pull rod - the double end stud bolt of the screw coupling, intended for the railway rolling stock - Google Patents
Method for making the Rd 50x7 thread on a pull rod - the double end stud bolt of the screw coupling, intended for the railway rolling stockInfo
- Publication number
- PL423676A1 PL423676A1 PL423676A PL42367617A PL423676A1 PL 423676 A1 PL423676 A1 PL 423676A1 PL 423676 A PL423676 A PL 423676A PL 42367617 A PL42367617 A PL 42367617A PL 423676 A1 PL423676 A1 PL 423676A1
- Authority
- PL
- Poland
- Prior art keywords
- thread
- rolling
- forging
- pull rod
- making
- Prior art date
Links
Landscapes
- Forging (AREA)
Abstract
Przedmiotem wynalazku jest sposób wykonywania gwintu Rd 50x7 na odkuwce cięgła - śruby dwustronnej sprzęgu śrubowego stosowanego powszechnie w szynowym taborze kolejowym kolei europejskich, normalnotorowych w tym od wielu, wielu lat również na PKP w kraju. Sposób wykonywania gwintu polega na użyciu znanej głowicy walcująco - wygniatającej, trzyrolkowej do walcowania - wygniatania półokrągłego gwintu na drodze obróbki plastycznej na zimno na odkuwce - przygotówce cięgla - śruby dwustronnej. Zabieg walcowania - wygniatania gwintu eliminuje dotychczas stosowane toczenie gwintu na drodze obróbki skrawaniem i gwarantuje, że włókna materiału odkuwki cięgła - śruby dwustronnej układają się równolegle do wygniecionego półokrągłego profilu - zarysu gwintu nie przerywając (jak to występuje podczas obróbki skrawaniem) w żadnym miejscu ciągłości tych włókien. Ma to zasadnicze znaczenie dla uzyskania wymaganej dużej wytrzymałości na zerwanie cięgła - śruby dwustronnej jako najsłabszej części śrubowego urządzenia cięgłowego stosowanego w taborze kolejowym. Sposób wykonywania gwintu może być stosowany w zalecanym układzie: nieruchoma odkuwka - przygotówka cięgła - śruby dwustronnej i obracana mechanicznie głowica walcująco - wygniatająca, trzyrolkowa, lub w układzie: obracana odkuwka - przygotówka i nieobracająca się głowica walcująco - wygniatająca. Najbardziej korzystnym jest sposób jednoczesnego walcowania - wygniatania gwintu po obu stronach nieruchomej odkuwki - przygotówki dwiema obracanymi mechanicznie głowicami umieszczonymi naprzeciwko siebie w osi odkuwki, jak na rysunku.The subject of the invention is a method of making an Rd 50x7 thread on a forging rod - a double-sided screw coupling commonly used in European rolling stock railway rolling stock, including for many, many years also on PKP in the country. The method of making the thread involves the use of a known rolling-bending head, three-roller for rolling - forming a half-round thread by cold forming on the forging - rod preparation - stud bolt. Rolling operation - thread forming eliminates the thread turning used until now by machining and guarantees that the fibers of the forging material of the pull rod - studs are parallel to the pressed half-round profile - the thread profile does not interrupt (as it occurs during machining) in any place of continuity of these fibers. This is essential for obtaining the required high breaking strength of the pull rod - the stud bolt as the weakest part of the pull rod screw used in rolling stock. The method of making the thread can be used in the recommended system: stationary forging - pull rod preparation - stud bolt and mechanically rotating rolling-bending head, three-roller, or in the system: rotating forging - preparation and non-rotating rolling-bending head. The most beneficial is the method of simultaneous rolling - threading on both sides of the stationary forging - the workpiece with two mechanically rotating heads placed opposite each other in the forging axis, as in the drawing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL423676A PL233929B1 (en) | 2017-12-01 | 2017-12-01 | Method for making the Rd 50x7 thread on a pull rod - the double end stud bolt of the screw coupling, intended for the railway rolling stock |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL423676A PL233929B1 (en) | 2017-12-01 | 2017-12-01 | Method for making the Rd 50x7 thread on a pull rod - the double end stud bolt of the screw coupling, intended for the railway rolling stock |
Publications (2)
Publication Number | Publication Date |
---|---|
PL423676A1 true PL423676A1 (en) | 2019-06-03 |
PL233929B1 PL233929B1 (en) | 2019-12-31 |
Family
ID=66649293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PL423676A PL233929B1 (en) | 2017-12-01 | 2017-12-01 | Method for making the Rd 50x7 thread on a pull rod - the double end stud bolt of the screw coupling, intended for the railway rolling stock |
Country Status (1)
Country | Link |
---|---|
PL (1) | PL233929B1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4626006A (en) * | 1984-04-20 | 1986-12-02 | Toyota Jidosha Kabushiki Kaisha | Hose coupling |
PL165544B1 (en) * | 1991-05-27 | 1995-01-31 | Politechnika Szczecinska | Apparatus for producing rolled threads over full length of threaded worpiece |
JP2001289221A (en) * | 2000-04-06 | 2001-10-19 | Honda Motor Co Ltd | Self-forming bolt |
EP1625902B1 (en) * | 2003-03-24 | 2009-11-18 | Kyushu Tlo Company, Limited | Method and device for manufacturing bolt, screw rolling die used therefor, and multiple screw bolt |
PL207791B1 (en) * | 2002-03-27 | 2011-02-28 | Aoyama Seisakusho Co | Element with external thread and method of manufacture of the element with external thread |
-
2017
- 2017-12-01 PL PL423676A patent/PL233929B1/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4626006A (en) * | 1984-04-20 | 1986-12-02 | Toyota Jidosha Kabushiki Kaisha | Hose coupling |
PL165544B1 (en) * | 1991-05-27 | 1995-01-31 | Politechnika Szczecinska | Apparatus for producing rolled threads over full length of threaded worpiece |
JP2001289221A (en) * | 2000-04-06 | 2001-10-19 | Honda Motor Co Ltd | Self-forming bolt |
PL207791B1 (en) * | 2002-03-27 | 2011-02-28 | Aoyama Seisakusho Co | Element with external thread and method of manufacture of the element with external thread |
EP1625902B1 (en) * | 2003-03-24 | 2009-11-18 | Kyushu Tlo Company, Limited | Method and device for manufacturing bolt, screw rolling die used therefor, and multiple screw bolt |
Also Published As
Publication number | Publication date |
---|---|
PL233929B1 (en) | 2019-12-31 |
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