US 6,608,281 B2 · Laser beam machining head and laser beam machining apparatus having same

Abstract

A coaxial laser beam machining head, and a laser beam machining apparatus having it are provided. The head is small in size, free from the risk of damaging optical instruments, and inexpensive. The head comprises a collimating lens array, a first reflecting mirror for dividing laser light into a first divisional laser beam and a second divisional laser beam, a second reflecting mirror for further reflecting the first divisional laser beam to form a space portion between both divisional laser beams, a focusing lens array for focusing both divisional laser beams onto a portion to be welded, and a GMA electrode disposed in the space portion coaxially with the laser beams; or comprises a collimating lens array, a first reflecting mirror for reflecting part of laser light to form a space portion in a body of the laser light, a second reflecting mirror for further reflecting the part of the laser light, a focusing lens array for focusing the body of the laser light and the part of the laser light onto a portion to be welded, and a GMA electrode disposed in the space portion coaxially with the body of the laser light.

Claims17

Dependent claims

A laser beam machining head comprising:

one collimating optical system for making laser light into a parallel beam;
a first reflecting mirror for reflecting part of the laser light made into the parallel beam by the collimating optical system to divide the laser light into two beams, a first divisional laser beam and a second divisional laser beam;
a second reflecting mirror for further reflecting the first divisional laser beam reflected by the first reflecting mirror to form a space portion between the first divisional laser beam and the second divisional laser beam;
one focusing optical system for focusing the first divisional laser beam and the second divisional laser beam onto a portion to be machined;
and
a tip machining portion of machining means disposed in the space portion between the first divisional laser beam and the second divisional laser beam coaxially with the laser beams.

3 more elements

A laser beam machining head comprising:

one collimating optical system for making laser light into a parallel beam;
a first reflecting mirror for reflecting part of the laser light made into the parallel beam by the collimating optical system to withdraw the part of the laser light out of a body of the laser light, thereby forming a space portion in the body of the laser light;
a second reflecting mirror located outside the body of the laser light and adapted to reflect the part of the laser light reflected by the first reflecting mirror so as to be parallel to the body of the laser light and be in contact with or in proximity to an outer peripheral surface of the body of the laser light;
one focusing optical system for focusing the body of the laser light, where the space portion has been formed by the first reflecting mirror, and the part of the laser light reflected by the first and second reflecting mirrors, onto a portion to be machined;
and
a tip machining portion of machining means disposed in the space portion of the body of the laser light coaxially with the body of the laser light.

3 more elements

Dependencies are inferred from the claim text.

Laser beam machining head and laser beam machining apparatus having same

Life of this patent

Laser beam machining head and laser beam machining apparatus having same

Life of this patent

Abstract

Claims17