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Machine translation
1. (WO1982000014) METHOD OF OBTAINING ON A WORKPIECE A RESILIENT SCREW THREAD WITH CLOSED HELICAL CAVITY INSIDE ITS PROFILE AND THREAD-FORMING TOOL THEREFOR
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1982/000014    International Application No.:    PCT/SU1980/000113
Publication Date: 07.01.1982 International Filing Date: 26.06.1980
IPC:
B21H 3/08 (2006.01), B23G 7/02 (2006.01)
Applicants: DNEPROPETROVSKY GORNY INSTITUT IM. ARTEMA (For All Designated States Except US).
TOROPOV, Gennady, Aleksandrovich; (For US Only).
SHAMENKO, Stepan, Petrovich; (For US Only).
DIDYK, Rostislav, Petrovich; (For US Only).
TOROPOV, Anatoly, Aleksandrovich; (For US Only)
Inventors: TOROPOV, Gennady, Aleksandrovich; .
SHAMENKO, Stepan, Petrovich; .
DIDYK, Rostislav, Petrovich; .
TOROPOV, Anatoly, Aleksandrovich;
Priority Data:
Title (EN) METHOD OF OBTAINING ON A WORKPIECE A RESILIENT SCREW THREAD WITH CLOSED HELICAL CAVITY INSIDE ITS PROFILE AND THREAD-FORMING TOOL THEREFOR
(FR) PROCEDE D'OBTENTION D'UN FILETAGE ELASTIQUE SUR UNE PIECE A USINER AVEC UNE CAVITE HELICOIDALE FERMEE A L'INTERIEUR DE SON PROFIL, ET OUTIL DE FORMATION DU FILET
Abstract: front page image
(EN)A method of obtaining on a workpiece a resilient screw thread with a closed helical cavity inside its profile comprises plastic deformation of the walls of a preliminarily manufactured screw groove with a depth exceeding that of the tooth spaces of the screw profile to be obtained, whereas the volume of material of the workpiece displaced when making the screw groove corresponds to the volume of the closed helical cavity inside the profile of the thus obtained screw thread. A thread-forming tool for implementing this method is provided with a shank (1) and a working part (2) consisting of two stages consecutively located along the same axis, one of them being a groove-forming stage (3) and the other a thread-forming stage (4), the thread profile pitches of both of them being equal to each other but shifted reciprocally by at least halfpitch in the axial direction and the external diameter of the groove-forming stage (3) exceeding the external diameter of the thread-forming stage (4).
(FR)Un procede d'obtention d'un filetage elastique sur une piece a usiner avec une cavite helicoidale fermee a l'interieur de son profil consiste a effectuer une deformation plastique des parois d'une gorge helicoidale prefabriquee avec une profondeur depassant la profondeur des espaces entre les dents du profil du filet a obtenir, tandis que le volume du materiau de la piece a usiner degage lors de l'usinage de la gorge helicoidale correspond au volume de la cavite helicoidale fermee a l'interieur du profil du filetage ainsi obtenu. Un outil de formation du filetage permettant de mettre en oeuvre ce procede comprend une tige (1) et un outil (2) consistant en deux etages consecutifs ayant un axe commun, l'un d'eux etant un etage de formation d'une gorge (3) et l'autre un etage de formation d'un filet (4), les pas du profil du filet pour les deux etages etant identiques mais decales l'un par rapport a l'autre d'au moins un demi pas dans le sens axial, le diametre exterieur de l'etage de formation d'une gorge (3) etant superieur au diametre exterieur de l'etage de formation d'un filet (4).
Designated States:
Publication Language: Russian (RU)
Filing Language: Russian (RU)