US 7,882,633 B2Granted

Method for machining shaft bearing seats

AssigneeNiles-Simmons Industrieanlagen GmbH

InventorsJ. Hans Naumann, Jurgen Haberkorn, Matthias Hertel, Wolfgang Gerhard

Life of this patent

Estimating the term…

Loading patent…

Abstract

Disclosed is a method for machining the bearing seats (HL, PL) of shafts (1), especially crankshafts. According to said method, the bearing seats (HL, PL) are subjected to the following machining operations after initially shaping a shaft (1) in a forging or casting process: the bearing seats (HL, PL) are preformed by cutting the same using a specific cutting edge; they are hardened; they are passed through dressing rollers; they are subjected to a preliminary rotary milling process; and they are subjected to a final rotary milling process. The preliminary and the final rotary milling process are carried out during substantially an entire rotation of the shaft (1) without longitudinally or tangentially advancing the milling cutter (12).

Claims9

Dependent claims

A method for machining the bearing seats of a crankshaft, wherein the bearing seats are subjected to the following machining operations after a crankshaft having a longitudinal axis has been initially formed by forging or casting:

rough-shaping by chip-removing machining with specific cutters,
hardening,
passing through dressing rollers,
rough rotary milling and finish rotary milling via a milling cutter,
wherein the rough rotary milling and the finish rotary milling are respectively applied substantially during one complete revolution of the crankshaft, without longitudinal feed, and without tangential feed, relative to a tangential surface of the respective bearing seat, of the milling cutter, and the infeed of the milling cutter during immersion at the beginning of the rough rotary machining and at the beginning of the finish rotary machining has only an axial component relative to the rotation axis of the milling cutter.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/720,243Filed 25 Nov 2005
Priority: DE 10 2004 057 11126 Nov 2004
Published: US 2008/0008550 A110 Jan 2008
Granted: 8 Feb 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification22 codes

B24B 5/42
Single-purpose machines or devices: for grinding crankshafts or crankpins
B23C 3/06
Milling particular work; Special milling operations; Machines therefor: milling crankshafts
B23C 5/109
Shank-type cutters, i.e. with an integral shaft: with removable cutting inserts
B23P 13/00
Making metal objects by operations essentially involving machining but not covered by