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Title: Remote drill bit loader

Abstract

A drill bit loader is described for loading a tapered shank of a drill bit into a similarly tapered recess in the end of a drill spindle. The spindle has a transverse slot at the inner end of the recess. The end of the tapered shank of the drill bit has a transverse tang adapted to engage in the slot so that the drill bit will be rotated by the spindle. The loader is in the form of a cylinder adapted to receive the drill bit with the shank projecting out of the outer end of the cylinder. Retainer pins prevent rotation of the drill bit in the cylinder. The spindle is lowered to extend the shank of the drill bit into the recess in the spindle and the spindle is rotated to align the slot in the spindle with the tang on the shank. A spring unit in the cylinder is compressed by the drill bit during its entry into the recess of the spindle and resiliently drives the tang into the slot in the spindle when the tang and slot are aligned. In typical remote drilling operations, whether in hot cells or water pits, drill bits have beenmore » held using a collet or end mill type holder with set screws. In either case, to load or change a drill bit required the use master-slave manipulators to position the bits and tighten the collet or set screws. This requirement eliminated many otherwise useful work areas because they were not equipped with slaves, particularly in water pits.« less

Inventors:
Publication Date:
Research Org.:
Bettis Atomic Power Lab., West Mifflin, PA (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Nuclear Energy, Washington, DC (United States)
OSTI Identifier:
663341
Patent Number(s):
PATENTS-US-A8614871
Application Number:
ON: DE98002907; PAN: 8-614,871; TRN: AHC29818%%178
Assignee:
US Dept. of Energy, Washington, DC (United States) BAPL; SCA: 420203; PA: EDB-98:114843; SN: 98002017780
DOE Contract Number:  
AC11-93PN38195
Resource Type:
Patent Application
Resource Relation:
Other Information: PBD: 1996
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; ROTARY DRILLS; DRILL BITS; HOT CELLS; REMOTE HANDLING; REMOTE HANDLING EQUIPMENT; DESIGN

Citation Formats

Dokos, J.A. Remote drill bit loader. United States: N. p., 1996. Web.
Dokos, J.A. Remote drill bit loader. United States.
Dokos, J.A. Tue . "Remote drill bit loader". United States. https://www.osti.gov/servlets/purl/663341.
@article{osti_663341,
title = {Remote drill bit loader},
author = {Dokos, J.A.},
abstractNote = {A drill bit loader is described for loading a tapered shank of a drill bit into a similarly tapered recess in the end of a drill spindle. The spindle has a transverse slot at the inner end of the recess. The end of the tapered shank of the drill bit has a transverse tang adapted to engage in the slot so that the drill bit will be rotated by the spindle. The loader is in the form of a cylinder adapted to receive the drill bit with the shank projecting out of the outer end of the cylinder. Retainer pins prevent rotation of the drill bit in the cylinder. The spindle is lowered to extend the shank of the drill bit into the recess in the spindle and the spindle is rotated to align the slot in the spindle with the tang on the shank. A spring unit in the cylinder is compressed by the drill bit during its entry into the recess of the spindle and resiliently drives the tang into the slot in the spindle when the tang and slot are aligned. In typical remote drilling operations, whether in hot cells or water pits, drill bits have been held using a collet or end mill type holder with set screws. In either case, to load or change a drill bit required the use master-slave manipulators to position the bits and tighten the collet or set screws. This requirement eliminated many otherwise useful work areas because they were not equipped with slaves, particularly in water pits.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {12}
}

Patent Application:

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