发明名称 |
Method and apparatus for laser welding thermoplastic resin members |
摘要 |
A method and apparatus for welding members formed of thermoplastic resin material, with high welding strength and small strength variations. A laser welding apparatus 1 brings a first member 2 formed of a transmissive thermoplastic resin that transmits a laser beam into contact with a second member 3 formed of an absorptive thermoplastic resin that absorbs the laser beam, and joins the thermoplastic resin members by melting their contact surfaces 4 with the laser beam. The laser welding apparatus 1 further comprises a laser beam generator 10 for irradiating the contact surfaces with the laser beam shone from the side of the first member 3 so as to melt at least one of the contact surfaces of the first member and the second member. The apparatus also comprises a clamp mechanism 20 for pressing the first member and the second member together, a temperature sensor 31 as an adjusting means for adjusting the pressing force applied to the first member and the second member, and a personal computer 32 for calculating the pressing force based on the output of the temperature sensor. The clamp mechanism is controlled with the calculated pressing force. |
申请公布号 |
US9073266(B2) |
申请公布日期 |
2015.07.07 |
申请号 |
US200812190001 |
申请日期 |
2008.08.12 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA;E. I. Du Pont De Nemours and Company |
发明人 |
Watanabe Toshio;Nakajima Katsuhiko;Nakamura Hideo;Mori Hiroshi;Fujita Susumu;Nakatani Mitsunobu |
分类号 |
B29C65/02;B29C65/16;B29C65/78;B29C65/00;B29K77/00;B29K101/12 |
主分类号 |
B29C65/02 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC |
主权项 |
1. An apparatus for laser welding thermoplastic resin members in which a first member formed of a transmissive thermoplastic resin that transmits a laser beam is brought into contact with a second member formed of an absorptive thermoplastic resin that absorbs the laser beam, and their contact surfaces are melted with the laser beam for joining the members, the apparatus comprising:
a laser beam generating means for irradiating the contact surfaces with a laser beam shone from the side of the first member so as to melt at least one of the contact surfaces of the first member and the second member; a pressing means for pressing the first member and the second member together by a pressing force; an adjusting means for adjusting the pressing force applied to the first member and the second member; a detecting means for detecting a temperature or a pressure at a melted portion melted by laser beam irradiation of the first member and the second member, and a controller configured to directly control the adjustment means based on the detected temperature or pressure; wherein the controller controls the pressing force by increasing the pressing force to a first pressing force when a detected temperature or pressure is greater than a predetermined value, and further increasing the pressing force to a second pressing force when another detected temperature or pressure indicates cooling at the melted portion. |
地址 |
Aichi-ken JP |