Amada Holdings Company Ltd.

Amada Company, Limited

Masato Kunihiro

Akihiko Sugiyama

Hiroaki Ishiguro

Hideo Hara

Yuya Mizoguchi

Takuya Okamoto

Hitoshi Omata

Masahito Ito

Yingjun Jin

Ryohei Ito

Hironobu Miyoshi

In a laser cutting method, a cut slit of a welding protruding-tab configured to be bent by laser cutting along an outline of a processed part and press a peripheral surface of the processed part is laser-cut in advance in a periphery of the processed part that is cut from a workpiece, and an outline slit is formed by performing laser cutting along the outline of the processed part and a free end of the welding protruding-tab is welded to the peripheral surface of the processed part. According to the above described laser cutting method, it is possible to retain the processed part reliably and stably for a long period, and it is possible to easily separate the processed part from the workpiece with almost no trace left on the processed part.

Laser cutting method and machine, and automatic programing apparatus

A laser cutting nozzle includes an inner nozzle and an outer nozzle. The inner nozzle exhibits a tube shape having a through hole on an axis and having a diameter decreasing on a first end portion side and includes a notch extending in the axis direction along an outer peripheral surface on a second end portion side. The outer nozzle is fitted to the outer peripheral surface of the inner nozzle and includes a vent passage including the notch and communicating between the first end portion and the second end portion in the axis direction. A minimum flow cross-sectional area of the vent passage matches an opening area of the notch in an end surface on the second end portion side.

Laser cutting nozzle and laser cutting method

According to a laser cutting method, a processed part is laser-cut so that the processed part doesn't drop off from a sheet-shaped workpiece. In the laser cutting method, a cut slit of a pressing protrusion, which is curved due to a laser cutting process along an outline of the processed part and then presses a peripheral surface of the processed part, is preliminarily formed around the processed part to be cut out from the workpiece. Then, the laser cutting process is carried out along the outline of the processed part. The pressing protrusion curves toward the processed part due to the laser cutting process of the processed part, and then the processed part is retained by the pressing protrusion.

A period of time during which a laser beam moves through an inner region of a beam spot that ranges from a center of the beam spot to an area corresponding to a thermal energy of 44% with respect to a total thermal energy of the beam spot is set as a moving time tp. 'c', '&#x3c1;', &#x201c;&#x3bb;&#x201d;, &#x201c;T&#x201d;, &#x201c;T0&#x201d;, &#x201c;A&#x201d;, and &#x201c;Pd&#x201d; respectively represents a specific heat, a density, a thermal conductivity, a melting temperature, an environmental temperature, a light absorptance, and an energy density of the inner region. A time calculated from Equation (1) is set as a melting time tm. A plate thickness is represented by x and a value of tm/tp is represented by y. The value y is set between a lower limit value (Equation (2)) and an upper limit value (Equation (3)).&#xd7;&#x3c1;&#xd7;&#x3bb;&#xd7;&#x3c0;[(0)/(2&#xd7;)]&#x2003;&#x2003;(1)=0.0027&#x2003;&#x2003;(2)=0.0026&#x2003;&#x2003;(3)

Laser processing machine and laser processing method

Growing community of inventors

Kanagawa, Japan

Masato Kunihiro