Gear cutting – milling – or planing – Milling – Thread or helix generating
Reexamination Certificate
1999-04-29
2001-02-06
Briggs, William (Department: 3722)
Gear cutting, milling, or planing
Milling
Thread or helix generating
C074S397000, C409S066000
Reexamination Certificate
active
06183175
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a tool holder for a tool drive device.
2. Description of Prior Art
Interior threads, for example, have been produced by drilling and subsequent cutting, or respectively turning, of an interior thread which requires two work steps in succession. The cut threads are machine-cut threads. With the production of exterior threads it is possible to achieve a faster production speed, for example if the thread is generated by milling. Larger threads and exterior threads are produced by turning or milling on three-axis machines in three operations, and often have unacceptable tolerances in the geometry of roundness.
SUMMARY OF THE INVENTION
This invention has one object of creating a tool holder for clamping and operating a milling tool or a thread rolling die so that an inner thread can also be milled or rolled. In this case it should be possible to avoid unacceptable geometry tolerances.
This object is attained by this invention as described in the specification and outlined in the claims.
According to one advantage of this invention, it is possible with the tool holder of this invention to mill interior blind bores, also called pocket hole bores, even into a hollow shaft, for example. This provides completely new constructions, since a blind bore can have a larger diameter in the back in an area of its closed end than in an area which is open toward the outside.
A further advantage of this invention is that the clamped tool can be displaced and adjusted during the operation.
A tool holder with two concentric shafts is known from German Patent Reference DE-A-25 16 775. A tool receptacle for a thread milling cutter is pivotably arranged on an arm which is pivoted out by a worm gear by a defined amount. The tool, such as a thread milling cutter, is rotated about its own axis in the tool receptacle via this gear. The entire tool holder is simultaneously rotated around its axis. Thus the milling cutter actually describes a circular path in the course of the milling work which, with the simultaneous coordinated feeding, allows milling of a thread. The two concentric shafts in the gear are connected with each other by a gear with a fixed gear ratio. The tool holder is driven by a common driveshaft of a tool driving device.
REFERENCES:
patent: 3526167 (1970-09-01), Escobedo
patent: 3690220 (1972-09-01), Escobedo
patent: 3762272 (1973-10-01), Escobedo
patent: 4125057 (1978-11-01), Cox
patent: 4606683 (1986-08-01), Link et al.
patent: 5143492 (1992-09-01), Leeb
patent: 5960671 (1999-10-01), Nguyen
patent: 682 891 A5 (1993-12-01), None
patent: 25 16 775 (1976-10-01), None
patent: 0 237 035 (1987-09-01), None
patent: 20 456 (1918-03-01), None
Briggs William
Pauley Petersen Kinne & Fejer
LandOfFree
Steerable toolholder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Steerable toolholder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steerable toolholder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2609276