MAIN SHAFT FOR ROTATING TOOL PROVIDED WITH TOOL SEATING CHECK FUNCTION

• US 20200130067A1
• Filed: 10/16/2019
• Published: 04/30/2020
• Est. Priority Date: 10/31/2018
• Status: Active Grant

• Current Assignee: Nissei Homma Machinery Co., Ltd. (Nissei Plastic Industrial Co., Ltd.)
• Original Assignee: Nissei Homma Machinery Co., Ltd. (Nissei Plastic Industrial Co., Ltd.)
• Inventors: MAKABE, Toshio
• Granted Patent: US 11,623,315 B2
• Time in Patent Office: Days
• CPC Class Codes: B23B 31/265 by means of collets
• CPC Class Codes: B23Q 17/005 by measuring a force, a pressure or a deformation

Abstract

A rotating tool is held in a tool holder. The tool holder includes a male tapered portion. The tool holder is rotated by a rotating-tool main shaft. The rotating-tool main shaft includes a hollow main shaft. The hollow main shaft includes a circular conical hole formed in a tip and corresponding to the male tapered portion. The hollow main shaft includes a fluid passage to detect that the male tapered portion is properly attached to the circular conical hole, and an opening to blow out a fluid. The opening is provided in a portion offset from the circular conical hole.

Claims

1. A main shaft for a rotating tool provided with a tool seating check function comprising:

a rotating tool held in a tool holder, the tool holder comprising a male tapered portion, and the tool holder being rotated by the rotating-tool main shaft; and

a hollow main shaft that has a circular conical hole which is formed in a tip and which corresponds to the male tapered portion, the hollow main shaft comprising a fluid passage to detect that the male tapered portion is properly attached to the circular conical hole, and an opening to blow out a fluid,

wherein the opening is provided in a portion offset from the circular conical hole.

2. The rotating-tool main shaft provided with the tool seating check function according to claim 1, wherein the offset portion from the circular conical hole is a cylindrical portion that extends from a small-diameter end of the circular conical hole.

3. The rotating-tool main shaft provided with the tool seating check function according to claim 1, wherein the opening is provided in a position where the blown-out fluid collides the male tapered portion.