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DE498656C - Rolling device for the production of twist drill blanks with facets without twist - Google Patents

Rolling device for the production of twist drill blanks with facets without twist

Info

Publication number
DE498656C
DE498656C DESCH78323D DESC078323D DE498656C DE 498656 C DE498656 C DE 498656C DE SCH78323 D DESCH78323 D DE SCH78323D DE SC078323 D DESC078323 D DE SC078323D DE 498656 C DE498656 C DE 498656C
Authority
DE
Germany
Prior art keywords
twist
facets
rolling device
production
twist drill
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
DESCH78323D
Other languages
German (de)
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.)
MAX SCHMACHTENBERG
Original Assignee
MAX SCHMACHTENBERG
Publication date
Priority to DESCH78323D priority Critical patent/DE498656C/en
Application granted granted Critical
Publication of DE498656C publication Critical patent/DE498656C/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
    • B21H3/10—Making helical bodies or bodies having parts of helical shape twist-drills; screw-taps

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Description

Walzeinrichtung zur Herstellung von Spiralbohrerrohlingen mit Facetten ohne Drall Bei einem bekannten Verfahren zum Auswalzen--von Spiralbohrern mit Facetten von äuf Maß geschnittenen Stabenden wird der Stab erst flachliegend mit den die Schneidkanten begrenzenden Nuten und dann hochkant zwecks Bildung der Facetten unter Anwendung von Profilausgleichsstäben, die die äußeren Widerlager bilden, ausgewalzt.Rolling device for the production of twist drill blanks with facets without twist In a known method for rolling out twist drills with facets If the ends of the rod are cut to size, the rod will first lie flat with the die Grooves delimiting cutting edges and then edgewise to form the facets below Use of profile compensation bars, which form the outer abutments, rolled out.

Gegenstand der Erfindung. ist eine Walzeinrichtung, die ohne Ausgleichsstäbe ein Auswalzen der Nuten und Facetten ermöglicht. Dies wird dadurch erreicht, daß die Teilebene zwischen den Kalibern der Ober-und Unterwalze, die für die letzten Stiche des in bekannter Weise in mehreren Vorstichen vorgewalzten Stahlstabes bestimmt sind, durch oder annähernd durch die Schneidkanten geht, wodurch hinterschnittene Höhlungen vermieden werden.Subject of the invention. is a rolling device that does not have compensating bars enables the grooves and facets to be rolled out. This is achieved in that the sub-level between the calibers of the upper and lower roller, which is for the last Stitches of the steel rod pre-rolled in several preliminary stitches in a known manner are going through or approximately through the cutting edges, creating undercut Cavities are avoided.

Die Zeichnung veranschaulicht schematisch das Walzenkaliber in Abb. i im Längsschnitt und in Abb. 2 im Querschnitt.The drawing schematically illustrates the roller caliber in Fig. i in longitudinal section and in Fig. 2 in cross section.

Die Abb. i läßt erkennen, daß die Teilebene zwischen den Walzen a und b annähernd durch die Schneidkante des Bohrers d geht, so daß keine hinterschnittenen Höhlungen infolge der Nuten f entstehen. Die Ober- und Unterwalze sind in bekannter Weise mit ineinandergreifenden Nuten und Rändern c versehen, die versetzt zur Kalibermitte liegen, so daß ein geschlossenes Kaliber zur Bildung von Spiralbohrer-Rohlingen mit Facetten entsteht.Fig. I shows that the sub-plane between the rollers a and b goes approximately through the cutting edge of the drill d so that no undercut Cavities arise as a result of the grooves f. The top and bottom rollers are well known Way provided with interlocking grooves and edges c, offset to the center of the caliber lie so that a closed caliber for the formation of twist drill blanks with facets.

Claims (1)

PATENTANSPRUCH: Walzeinrichtung zur Herstellung von Spiralbohrerrohlingen mit Facetten ohne Drall, dadurch gekennzeichnet, daß die Teilebene zwischen den Kalibern der Ober- und Unterwalze, die für die letzten Stiche des in mehreren Vorstichen vorgewalzten Stahlstabes bestimmt sind, .durch oder annähernd durch die Schneidkanten des herzustellenden Spiralbohrers geht, so daß keine hinterschnittenen Höhlungen sich ergeben. . PATENT CLAIM: Rolling device for the production of twist drill blanks with facets without twist, characterized in that the partial plane between the calibers of the upper and lower rollers, which are intended for the last stitches of the steel rod pre-rolled in several preliminary stitches, through or approximately through the cutting edges of the Twist drill goes, so that there are no undercut cavities. .
DESCH78323D Rolling device for the production of twist drill blanks with facets without twist Expired DE498656C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH78323D DE498656C (en) Rolling device for the production of twist drill blanks with facets without twist

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH78323D DE498656C (en) Rolling device for the production of twist drill blanks with facets without twist

Publications (1)

Publication Number Publication Date
DE498656C true DE498656C (en) 1930-05-24

Family

ID=7441598

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH78323D Expired DE498656C (en) Rolling device for the production of twist drill blanks with facets without twist

Country Status (1)

Country Link
DE (1) DE498656C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1104481B (en) * 1953-04-10 1961-04-13 Franz Erdelyi Method and device for hot rolling cutting tools having longitudinal grooves with a rotating working movement from a round bar

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1104481B (en) * 1953-04-10 1961-04-13 Franz Erdelyi Method and device for hot rolling cutting tools having longitudinal grooves with a rotating working movement from a round bar

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