Title:
単一ピストンまたは2重ピストンを使用する低衝撃スポット溶接シリンダ
Document Type and Number:
Japanese Patent JP2008522825
Kind Code:
A
Abstract:
A weld cylinder having a single piston arrangement is provided. The cylinder has a movable retract piston assembly with the piston arranged within the retract piston assembly. The piston supports a rod that is movable between home, intermediate, work, and advanced work positions. The rod moves rapidly from the home position to the intermediate position however, the rod moves more slowly from the intermediate position to the work position to reduce the impact force. A cushion chamber slowly exhausts through a pre-orifice and a hole in the cushion valve while an isolator is in an open position. Once the cushion valve opens in response to a retract-forward pressure on the cushion valve, the cushion chamber exhausts rapidly so that weld force increases rapidly to minimize increases in cycle time. Advance of a retract piston assembly is also cushioned. A weld-forward port is no longer provided on a cylinder barrel.
Inventors:
Tenzer, Peter
Application Number:
JP2007544703A
Publication Date:
July 03, 2008
Filing Date:
August 11, 2005
Export Citation:
Assignee:
Doven Limited
International Classes:
B23K11/11; F16J10/02
Domestic Patent References:
| JPH10211582A | 1998-08-11 | |||
| JP2002250307A | 2002-09-06 | |||
| JPH04133006U | 1992-12-10 | |||
| JPH10211582A | 1998-08-11 | |||
| JP2002250307A | 2002-09-06 | |||
| JPH04133006U | 1992-12-10 |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Masakazu Ito
Yuko Hara
Masakazu Ito
Yuko Hara