Title:
HOLLOW TUBE CUTTING METHOD AND CUTTING DEVICE
Document Type and Number:
Japanese Patent JP2020175462
Kind Code:
A
Abstract:
To provide a cutting method by which cutting of a hollow tube can be performed with high efficiency and with less finishing processes of a cut end face.SOLUTION: In a hollow tube cutting method, a first process in which a stress concentration zone is formed at a planned cutting position P of a hollow tube 1, and a second process in which one is fixed and the other is twisted with the planned cutting position p in the hollow tube 1 as a boundary are executed in order. When one is fixed and the other is twisted with the stress concentration zone 2 of the hollow tube 1 as a boundary after the stress concentration zone 2 has been formed on the hollow tube 1, stress is concentrated to the stress concentration zone 2, and thus, fragile destruction progresses at once. Therefore, cutting of the hollow tube 1 can be performed by only a work for forming the stress concentration zone 2 and a thread cutting work, the time required for cutting is short, and cutting of the hollow tube can be performed with high efficiency. Further, since the thread cutting work merely adds a force in a circumferential direction of the hollow tube 1, roundness of the hollow tube 1 does not decrease, and good cut end face can be obtained.SELECTED DRAWING: Figure 1
Inventors:
YOSHIMURA HIDENORI
KYUMA SHOTARO
KYUMA SHOTARO
Application Number:
JP2019078409A
Publication Date:
October 29, 2020
Filing Date:
April 17, 2019
Export Citation:
Assignee:
UNIV KAGAWA
International Classes:
B23D21/00; B26F3/00
Attorney, Agent or Firm:
Yamauchi Patent Office