For each titanium the right drill

Titanium machining For each titanium the right drill

2023-10-09 Source: Mikron Tool 2 min Reading Time

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Mikron Tool presented the new Crazy Drill Cool Titanium ATC/PTC series at EMO 2023 in Hanover, which ensures maximum process reliability when drilling pure titanium and its alloys.

The application horizon is broad: aerospace, motor racing, medical and dental equipment, surgical orthopaedics, and the jewelry and watch sectors all use titanium in immense quantities.(Source: Mikron Tool) — The application horizon is broad: aerospace, motor racing, medical and dental equipment, surgical orthopaedics, and the jewelry and watch sectors all use titanium in immense quantities.
(Source: Mikron Tool)

Titanium is a high-performance material that presents a challenge to machining. And not all titanium is the same. Depending on whether it is pure titanium or alloyed titanium, the machining behaviour is different. To meet these challenges, Mikron Tool has developed drills that are perfectly matched to the respective titanium grades, enabling them to machine titanium safely, with higher cutting results, longer tool life and excellent hole quality.

Machining recalcitrant titanium is very demanding. One of the reasons for this is the combination of its properties of high elasticity and tensile strength. The high toughness makes chip breakage difficult to achieve. Due to its low thermal conductivity, heat is not removed from the cutting area by the chip. Titanium also tends to form built-up edges. All this leads to increased wear and reduces process reliability during drilling.

Gallery

Now even faster and even safer drilling in titanium: Twice as fast and three times longer tool life with maximum process reliability.(Source: Mikron Tool)

The patented special shape of Mikron Tool's cooling channels enables a four times higher volume of coolant to be shot through the tool at the same pressure. (Source: Mikron Tool)

Mikron Tool’s new high-performance drills for titanium have up to three times longer tool life and work with twice the feed than current competitors, the company claims.(Source: Mikron Tool)

And drilling in titanium is much more challenging than milling. The viscoelastic properties of titanium cause the drill to stick and the pressure on the cutting edges to increase. This usually leads to uncontrolled drill breakage. Material adhesion to the cutting edges and guide chamfers increases the cutting forces, which can cause the cutting edges to break. Chip shape is also a problem. This is because the titanium chips tend to compact in the head area and prevent further chips from flowing in. The high temperature load on the cutting edges is an additional complicating factor.

In order to reduce the heat in the cutting area, the cooling lubricant must reach the machining area directly. The two cooling channels with very large cross sections carry massive amounts of coolant to the tip of the drill, ensuring constant cooling and lubrication of the cutting edges. At the same time, the powerful coolant jet flushes the chips through the polished flutes and prevents chip jams.

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