Title:
IMPACT ROTARY TOOL, TORQUE CALCULATION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2022/054438
Kind Code:
A1
Abstract:
The purpose of this disclosure is to precisely calculate a tightening torque when a fastener is tightened. An impact rotary tool (1) comprises: a drive source; an impact force generation unit; an output shaft; a torque measurement unit; and a torque calculation unit (141). The impact force generation unit generates, from power of the drive source, an impact force in a pulse form. The output shaft transmits the impact force to a tip tool. The torque measurement unit (11) measures a torque applied to the output shaft. The torque calculation unit (141) calculates, when a plurality of peak values are contained in a torque waveform of the torque measured by the torque measurement unit while the impact is applied once, the tightening torque on the basis of the highest peak value of one or more of second or later peak values.
Inventors:
NAKAMOTO MASANORI
MURAKAMI HIROAKI
HONDA AKIKO
OZAWA KIMITAKA
MURAKAMI HIROAKI
HONDA AKIKO
OZAWA KIMITAKA
Application Number:
PCT/JP2021/027876
Publication Date:
March 17, 2022
Filing Date:
July 28, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
B25B23/14
Foreign References:
| JP2018122392A | 2018-08-09 | |||
| JPH07246529A | 1995-09-26 | |||
| JP2018089704A | 2018-06-14 |
Other References:
See also references of EP 4212284A4
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (JP)
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