Alan G Levine

Address:

1190 NE 87 St, Miami, FL 33138

VIN:

1G1YY26U875104162

Make:

CHEVROLET

Model:

CORVETTE

Year:

2007

Address:

11424 SW 18 Ct, Miramar, FL 33025

VIN:

1N4AL21E37N412191

Make:

NISSAN

Model:

ALTIMA

Year:

2007

US Patent:

51229668, Jun 16, 1992

Filed:

Sep 18, 1989

Appl. No.:

7/408519

Inventors:

Willem Jansen - Weston MA
Alan R. Levine - Westwood MA
Melvin Platt - Holliston MA

Assignee:

Northern Research & Engineering - Woburn MA

International Classification:

G06F 1546

US Classification:

3644742

Abstract:

A computer generated tool path interference check including a method of checking for interference between a workpiece and a cutting tool during the numerical control machining of the workpiece by the cutter tool. Computer simulation is utilized to determine at least a portion of the workpiece that is desired to be checked for possible interference with the path of the cutter tool. The spatial relationship between the workpiece and the cutter tool during the machining are modelled as the relative positioning of the computerized images of the portion of the workpiece and the cutter tool, respectively. The relative positioning of the computerized images of the portion of the workpiece and the cutter tool are observed to check whether an interference will occur between the workpiece and the cutter tool during the machining.

US Patent:

51074362, Apr 21, 1992

Filed:

Apr 6, 1990

Appl. No.:

7/505385

Inventors:

Alan R. Levine - Westwood MA
Pedro H. Moura - Melrose MA
Brad W. Amidon - Somerville MA
Willem Jansen - Weston MA
Melvin Platt - Holleston MA

Assignee:

Northern Research & Engineering Corp. - Woburn MA

International Classification:

G06F 1540
G05B 1925

US Classification:

36447428

Abstract:

A method for determining a smooth machining course for a cutting tool during machining of a workpiece. Each possible cutting tool position, with respect to the workpiece, is defined by a separate reference vector. A progression of points are defined as a tool path. A first specified portion of the reference vector will follow the tool path during machining of the workpiece. A series of reference planes are generated, each plane defines a planar set of all possible reference vector positions for each point. An acceptable range from eahc set is established which defines acceptable reference vector positions within each plane for each point. A tool course is generated, which will be followed by a second portion, distant from the first portion, of the reference vector utilizing an algorithm to minimize irregularities of the course, and to contain the course entirely within the acceptable range.

US Patent:

53910249, Feb 21, 1995

Filed:

Mar 31, 1994

Appl. No.:

8/221211

Inventors:

Alan R. Levine - Westwood MA
Brad W. Amidon - Malden MA

Assignee:

Northern Research & Engineering Corporation - MA

International Classification:

G06F 1540

US Classification:

409 84

Abstract:

A method for determining machining instructions for flank milling of a workpiece which reduces the undercut by analyzing the cutter orientation at a plurality of orientations to determine an orientation which results in a minimum undercut, smooths the machining instructions by analyzing the movement of the cutter and the workpiece in spherical coordinates and improves machinability by analyzing for near-axial conditions and selecting a modified cutter orientation for such near-axial conditions using a multi-criteria weighting factor.