Thread cutting machine

• US 9,122,257 B2
• Filed: 10/01/2013
• Issued: 09/01/2015
• Est. Priority Date: 10/01/2012
• Status: Active Grant

• Current Assignee: Okuma Corporation
• Original Assignee: Okuma Corporation
• Inventors: Ueno, Shigeki
• Primary Examiner(s): DURHAM, NATHAN E
• Application Number:
  US14/042,841
• Publication Number:
  US 20140094953A1
• Time in Patent Office: 700 Days
• Field of Search: 700/139, 700/160, 700/173, 700/186, 700/188, 700/193
• US Class Current: 1/1
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05B 19/4163 Adaptive control of feed or cutting velocity without NC B23Q15/12
• CPC Class Codes: G05B 2219/43129 Speed as function of curvature, in curves, corners smaller than in straight line

Abstract

A thread cutting machine for cutting a thread by rotating a main spindle and moving a feed axis includes a main-spindle speed computing section that computes and outputs a rotation speed of the main spindle based on a main-spindle rotation speed instruction for each thread cutting pass, and an acceleration/deceleration time computing section that computes and outputs an acceleration/deceleration delay time of the feed axis for each thread cutting pass so that a product of multiplication of the acceleration/deceleration delay time of the feed axis and the rotation speed of the main spindle is the same for all thread cutting passes.

Claims

1. A thread cutting machine for cutting a thread by rotating a main spindle and moving a feed axis, comprising:

a main-spindle speed computing section that computes and outputs a rotation speed of the main spindle based on a main-spindle rotation speed instruction for each thread cutting pass; and

an acceleration/deceleration time computing section that computes and outputs an acceleration/deceleration delay time of the feed axis for each thread cutting pass so that a product of multiplication of the acceleration/deceleration delay time of the feed axis and the rotation speed of the main spindle is the same for all thread cutting passes.