KOREA TUNGSTEN CO.,LTD

CNC / MCT machining

We cut tungsten and molybdenum parts to the dimensions on the drawing by turning, milling and drilling.

OVERVIEW

Tungsten and molybdenum have high melting points and are hard, but weak against impact. Cutting them the way ordinary metals are cut produces micro-cracks, so we set cutting speed, feed and tool choice to suit the material.

Heat generated during machining is carried away by coolant, and to reduce vibration we use rigid fixturing and tool holders with vibration damping. We also handle parts with bolt holes in the sides as well as the front and back faces.

5-axis machining center

Equipment

High-precision machining center

CNC machining center

CNC lathe

CNC horizontal turning center

CNC automatic lathe

5-axis machining center

Precision general-purpose lathe

Multi-axis precision milling machine

Super drill

SCOPE

Scope

Turning

Sets the outside diameter, inside diameter and steps of cylindrical parts.

CNC lathe · horizontal turning center · automatic lathe

Milling

Produces flats, grooves and holes at the positions on the drawing.

High-precision machining center · CNC machining center · general-purpose milling

Drilling

Drills deep holes and fine holes.

Super drill · CNC machining center

Boring

Opens out the interior to set the bore and wall thickness.

CNC lathe · horizontal turning center

Tapping

Cuts the thread that a bolt goes into.

CNC machining center

Multi-face machining

Finishes work in several directions in a single setup.

High-precision machining center · horizontal turning center

※ Tungsten barely cuts with tooling for ordinary steel, so we use diamond-coated carbide or PCD tools. For hole machining we set the point angle at 130–140° rather than 118° to spread the entry shock, and keep tool overhang short to prevent chatter.

CASE

CNC and MCT machining examples

Parts we machined on lathes and machining centers and delivered.

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

CASE 01

A disc part for semiconductor processing

Turning → hole machining → counterboring

We set the outside diameter and thickness of the disc by turning, then produced the bolt holes and the central seat. Tool breakage and chipping are frequent when drilling tungsten, so we drilled with a larger point angle and a lower spindle speed.

A finished T-shaped tungsten part — with a thread cut in the side face

CASE 02

A precision T-shaped part

Milling → side tapping

We milled the T-shaped profile and cut a thread in the side face. The focus was on dimensional accuracy at the corners and steps, and we finished by lowering the surface roughness after machining.

Two finished miniature tungsten parts — slender rods with a step

CASE 03

A miniature research part

Turning → step machining

Two part types machined from a university laboratory's drawings. They are thinner and smaller than a little finger and break or dent if clamped wrong, so after machining we inspected each one for damage before packing.