Title:
CONTROL METHOD AND DEVICE FOR IMPACT SCREW TIGHTENING DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/121085
Kind Code:
A1
Abstract:
In an impact screw tightening device using an electric motor as the drive source for rotation, tightening torque accuracy is improved and time required for screw tightening is reduced. A control method for an impact screw tightening device using an electric motor as the drive source for rotation, where an electric current is intermittently supplied to the motor to drive and rotate it so that torque applied to a load by the rotation of the motor is pulse-shaped on a time axis, and where, after the torque has reached target approach torque TQN which is a first set value, an electric current for each beat of the pulse of the torque is controlled so that an increment for each beat is less than that before the torque reaches the target approach torque TQN.
Inventors:
ITO TAKAYA (JP)
SHIBATA YOSHITSUGU (JP)
TAKAMURA HITOSHI (JP)
SHIBATA YOSHITSUGU (JP)
TAKAMURA HITOSHI (JP)
Application Number:
PCT/JP2006/309415
Publication Date:
November 16, 2006
Filing Date:
May 10, 2006
Export Citation:
Assignee:
ESTIC CORP (JP)
HONDA MOTOR CO LTD (JP)
ITO TAKAYA (JP)
SHIBATA YOSHITSUGU (JP)
TAKAMURA HITOSHI (JP)
HONDA MOTOR CO LTD (JP)
ITO TAKAYA (JP)
SHIBATA YOSHITSUGU (JP)
TAKAMURA HITOSHI (JP)
International Classes:
B25B23/14; B25B21/00
Foreign References:
| JP2004322262A | 2004-11-18 | |||
| JPH05131377A | 1993-05-28 | |||
| JPS58171272A | 1983-10-07 | |||
| JPS59219176A | 1984-12-10 | |||
| JPH081536A | 1996-01-09 | |||
| JP2001521448A | 2001-11-06 |
Attorney, Agent or Firm:
Kubo, Yukio (1-26 Nishinakajima 7-chome, Yodogawa-k, Osaka-shi Osaka 11, JP)
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