1. Attach the diamond wheel to your bench grinder. Refer to your manual to ensure that the wheel is properly attached and the grinder itself is appropriately mounted.

2. Hold your tungsten carbide tool against the rest beneath the wheel. Touch the tip to the wheel, but do not turn on the grinder yet. Adjust the rest as needed so that you achieve the necessary grinding angle for your particular tool. Many rests will allow you to adjust both the height and the angle of the rest.

3. Remove the tool from the rest, then turn on the grinder. Touch the tip of the tool to the moving wheel, just as you did before when determining the angle, and use the rest to guide the angle of the grinding. Carbide may emit short red sparks during grinding. These are normal. The carbide tool may also become very hot. Work in short intervals and do not burn yourself, overheat the tool or touch the tool immediately after grinding. Continue grinding until the tool is sharpened.


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Single-Point Tools
A variety of single-point cutting tools are used to make industrial cuts on assembly lines. American Carbide Tool Company makes a straight turning tool, lead angle turning tool, square nose utility tool, cutoff tool, pointed nose utility tool and a round shank boring tool. These tools allow cutters to make cuts at angles from 0 degrees to 90 degrees.

Saw Blades
Carbide-tipped saw blades can be used to cut almost all home building materials. They're used to cut stainless steel, wood, particle board, ferrous and non-ferrous metals, laminates and fiber cement board.

Oscillating Blades
Because of the repetitive nature of the oscillating motion, oscillating blades can be carbide-tipped to prevent the blade from dulling out quickly. Carbide-tipped oscillating blades are most often used to shave down grout and plaster.

Carbide Burs
Welders use carbide burs to grind back and cut into welds. They are manufactured in almost every shank and size you can imagine, from ball-shaped to cone-shaped to the inverted cone.


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We have known that tungsten alloy can be used in defense and nuclear industries. Otherwise, tungsten alloy can be also adopted in aerospace industry.

With the high melting point, excellent high-temperature and good characteristics of thermal shock resistance and thermal fatigue, tungsten alloy is widely used for high-temperature structural components in aerospace industry. For instance, tungsten copper material can be used for spout, throat insert or vane of rocket and missile.


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The choice of geometry will always affect electrode life, arc starting, weld penetration, and arc shape. Regardless of the geometry selected, the electrode configuration must be tested during welding procedure development. The geometry should be noted as a critical process variable for the weld procedure and held to close tolerances for all subsequent welds.

Electrode Diameter. The best place to start when choosing the electrode diameter is to consult the welding equipment manufacturer's recommendations. While small diameters are easier to arc-start, large diameters accommodate higher amperages and last longer than smaller diameters. However, ifcurrent levels are higher than recommended, the tungsten will deteriorate too rapidly, fall into the weld pool, and contaminate the weld. Conversely, if the current is too low for the electrode diameter, the arc will become unstable.

Electrode Included Angle (Taper). Electrodes for DC welding should be ground longitudinally and concentrically with diamond wheels to an included angle in conjunction with the tip/flat preparation.

A blunt taper with a large included angle results in longer electrode life, better weld penetration, narrower arc shape, and the ability to handle more amperage without eroding. A sharp taper with a small included angle offers less arc wander and a wider, more consistent arc.

Tip (Flat). The shape of the tungsten electrode tip is an important process variable in precision arc welding, because as the flat size increases, so does the chance of arc wander and starting difficulty. However, increasing the flat also improves weld penetration and increases electrode life.

An incorrect, inconsistent flat can cause pointed electrode tips to drop into the weld pool. It also can result in arc instability, reduced electrode life, and changes in arc voltage from one electrode to another.
 

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
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