Turning process method for workpiece and machine tool

Patent metadata

Field	Value
Publication number	US-11819924-B2
Application number	US-202117457110-A
Country	US
Kind code	B2
Filing date	Dec 1, 2021
Priority date	Dec 10, 2020
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

A turning process method for processing a step-shaped workpiece includes: feeding a tool in a rotation axis direction and/or a radial direction of a workpiece while rotating the workpiece; using a tool that includes an insert with a main cutting edge having a straight portion and a machine tool having a pivot shaft of the tool in the machine side; processing a peripheral surface of the small diameter portion by turning the pivot shaft so as to have a cutting edge angle of less than 90°, the cutting edge angle having an angle between the straight portion of the main cutting edge and the rotation axis direction; and processing an end surface and a peripheral surface of the large diameter portion by turning the pivot shaft so as to have the cutting edge angle of 90° or more at a front of the large diameter portion.

First claim

What is claimed is:

1. A turning method for machining a step-shaped workpiece, the step-shaped workpiece including a small diameter portion and a large diameter portion continuous with the small diameter portion, the turning method comprising:
feeding a tool that includes an insert with a main cutting edge having a straight portion in either a rotation axis direction of a workpiece or a radial direction of a workpiece or both directions while rotating the workpiece;
using a machine tool having a pivot shaft of the tool in the machine side;
machining a peripheral surface of the small diameter portion by turning the pivot shaft so as to have a cutting edge angle of less than 90°, the cutting edge angle having an angle between the straight portion of the main cutting edge and the rotation axis direction; and
machining an end surface and a peripheral surface of the large diameter portion by turning the pivot shaft so as to have the cutting edge angle of 90° or more at a front of the large diameter portion.

2. A machine tool configured to perform the turning method for machining step-shaped workpiece according to claim 1 .

Assignees

• Okuma Machinery Works Ltd

Inventors

• Fujise Kazunori

Classifications

• B23B1/00 Primary

  Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods · CPC title

• B23B27/02

  Cutting tools with straight main part and cutting edge at an angle (B23B27/04 - B23B27/08 take precedence) · CPC title

• B23B29/043

  with cutting-off, grooving or profile cutting tools, i.e. blade- or disc-like main cutting parts (B23B29/14 takes precedence) · CPC title

• B23B3/00

  General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines · CPC title

• B23B25/00

  Accessories or auxiliary equipment for turning-machines (for machine tools in general B23Q; cooling or lubricating B23Q11/12) · CPC title