GB157923A - Method and apparatus for the production of twist drills - Google Patents

Method and apparatus for the production of twist drills

Info

Publication number
GB157923A
GB157923A GB163421A GB163421A GB157923A GB 157923 A GB157923 A GB 157923A GB 163421 A GB163421 A GB 163421A GB 163421 A GB163421 A GB 163421A GB 157923 A GB157923 A GB 157923A
Authority
GB
United Kingdom
Prior art keywords
rod
holder
rolling
skew
drills
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.)
Expired
Application number
GB163421A
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.)
ALBERT STRASMANN PRAZISIONS WE
Original Assignee
ALBERT STRASMANN PRAZISIONS WE
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 ALBERT STRASMANN PRAZISIONS WE filed Critical ALBERT STRASMANN PRAZISIONS WE
Publication of GB157923A publication Critical patent/GB157923A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape

Abstract

157,923. Strasmann Prazisions-Werkzeug und Maschinenfabrik, A. Jan. 17, 1919, [Convention date]. Drills.-Twist drills are formed from round rod by rolling two longitudinal grooves and twisting the end of the rod as it leaves the rolls. The grooves are finished, after reheating the rod, by skew-rolling. Segmental rolls a, b preferably built up of several rings a<1>, a<2>, a<3>, Fig. 3, have a series of passes to form the longitudinal grooves in the rod while the holder c is held in the hand. The holder c has a nut g which is then clamped in an arm h, guided in or pivoted to the roller frame so that when in use the rod is introduced into the finishing pass or one identical therewith. As soon as the rod is gripped in this pass the holder c is started in its spiral movement by a handle d and the rod is twisted. The holder c may also be used during the skew. rolling.
GB163421A 1919-01-17 1921-01-10 Method and apparatus for the production of twist drills Expired GB157923A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE535502X 1919-01-17

Publications (1)

Publication Number Publication Date
GB157923A true GB157923A (en) 1922-04-10

Family

ID=6556915

Family Applications (1)

Application Number Title Priority Date Filing Date
GB163421A Expired GB157923A (en) 1919-01-17 1921-01-10 Method and apparatus for the production of twist drills

Country Status (4)

Country Link
AT (1) AT86567B (en)
CH (1) CH92190A (en)
FR (1) FR535502A (en)
GB (1) GB157923A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699080A (en) * 1951-11-14 1955-01-11 Gen Motors Corp Apparatus for forming splines on tubular shafts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699080A (en) * 1951-11-14 1955-01-11 Gen Motors Corp Apparatus for forming splines on tubular shafts

Also Published As

Publication number Publication date
FR535502A (en) 1922-04-15
CH92190A (en) 1921-12-16
AT86567B (en) 1921-12-10

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