KOREA TUNGSTEN CO.,LTD

Laser machining and welding

A high-energy beam drills fine holes, and thin plate is cut and joined.

OVERVIEW

Laser machining vaporizes material locally, so it is efficient and fast for drilling very fine holes.

Thin plate such as tantalum is cut to the drawing and then joined by laser welding to build the geometry. Caps and covers that go into equipment are made this way.

Laser welder

Equipment

Laser welder

Laser cutter

Laser marker

Gantry automatic welder

Precision spot welder

SCOPE

Scope

Fine hole drilling

Produces micron-scale holes that are difficult with a tool.

Laser cutter

Plate cutting

Cuts thin sheet to the shape on the drawing.

Laser cutting machine · laser cutter

Laser welding

Joins the cut pieces to build the geometry.

Laser welder

Tantalum assemblies

Parts completed by welding, such as tantalum caps.

Laser cutting machine · laser welder

Engraving · marking

Marks the lot and part number on the part.

Laser marker

※ A laser drills fine holes quickly, but it leaves a heat-affected zone on the cut face, and in thick material it is hard to hold the hole perpendicular. We therefore choose between laser and EDM according to the type and geometry of the hole.

CASE

Laser machining and welding examples

Parts built by cutting and joining.

A finished tungsten disc part — with a central counterbore and bolt holes

CASE 01

A tantalum cap for semiconductor processing

Plate cutting → body and lid made → laser welding

We cut thin tantalum plate to the drawing, made the body and the lid separately, and joined them by laser welding. The finished cap was inspected, packed securely and delivered.

CASE 02

A tungsten reflector

Plate cutting → heat forming → chemical treatment

We cut tungsten plate to the dimensions on the drawing and bent it into a ring. Bent cold it would break, so it is formed under high heat, and the discoloration left by the heat treatment is reversed by chemical treatment.

A tungsten cylindrical part with a conical bore and a hole through the center

CASE 03

A cylindrical part with holes

Turning → hole drilling

A part with a hole through the center of a cylinder. Ordinary drilling wears tools heavily in tungsten, so we choose between laser and EDM according to the type and geometry of the hole.