Tungsten Dart News & Info

Tungsten Carbide Cutting Tool Machining Methods

Details: Category: Tungsten Information; Published on Wednesday, 05 November 2014 18:27

Tungsten carbide cutting tool when used in machining has four main machining methods to achieve shape precision, which are movement track method, rapid prototyping, form copying method and generating method.

I. Movement track method

Also known as tool nose movement track method, it achieves shape precision through the movement track of tool nose. When the tungsten carbide cutting tool moves around the workpiece, the surface geometry required will be obtained according to the movement track of the tool nose.

II. Rapid prototyping

It is a kind of machining method carried out by using formed tungsten carbide cutting tools. The cutting edge of formed cutting tools is the shape of workpieces. This method can simplified the machine tool and cutting movement and thus improve efficiency.

III. Form copying method

When form copying method is adopted, the cutting tool will conduct machining according to copying device. The shape precision achieved by adopting form copying method depends on the precision of the copying device and that of its forming movement.

IV. Generating method (generation method)

In this method, the workpiece and the tungsten carbide cutting tool do generating motion during machining. The surface gained by adopting generating method is enveloping surface formed by the generating motion done by the cutting edge and the workpiece. The cutting edge shape must be the conjugate curve of the surface being processed.

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Tungsten Pagoda Nail Sinkers

Details: Category: Tungsten Information; Published on Wednesday, 05 November 2014 08:47

Tungsten pagoda nail sinkers, also called tungsten pagoda nail weights offer the enhanced performance of tungsten. You can not only weight down those soft plastics with small tungsten pagoda nail weights that stay in place but achieving the right presentation you desire thanks to the careful barbs.

The higher density of tungsten allows them to be far smaller than comparable lead, brass or steel weights, and the exaggerated ribs of the pagoda nail weights also ensure they stay firmly in place inside your favorite soft plastic baits. Available in a variety of sizes, tungsten pagoda nail weights are also 100% environmentally friendly, helping to protect our fisheries for future generations.

Tungsten-pagoda-nail-sinkers

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Tungsten Carbide Boring Cutter Types

Details: Category: Tungsten Information; Published on Tuesday, 04 November 2014 18:47

Tungsten carbide boring cutter can be classified into single-blade boring cutter, double-blade boring cutter and multi-blade boring cutter according to its cutting blade number; into-hole boring cutter, blind hole boring cutter, ladder hole boring cutter and end face boring cutter according to its machining surface; into solid type, fabricated type and adjustable type according to its structure.

The two types of tungsten carbide boring cutters most commonly seen will be introduced in the following:

I. Single-blade boring cutter

The cutter bit structure of single-blade boring cutters is similar to that of turning tools. The cutter bit is installed in the cutter bar and is fixed by bolt according to the bore diameter of bores to be processed by hand. Single-blade boring cutters, with simple structure, have wide applications and can be used for rough, semi-finish and finish processing. However, the size of bore diameter being bored has to be ensured by adjusting the length of overhanging by hand. Therefore, it is to some extent troublesome. In addition, there is only one main cutting edge involved during boring, so it has relatively low efficiency, and is thus usually used in unit production.

II. Double-blade boring cutter

It has two symmetrical cutting edges and the radial force can cancel each other out during boring. The bore diameter size and precision of workpieces are ensured by the radial dimension of tungsten carbide boring cutters.

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Tungsten Carbide Boring Cutter Installation

Details: Category: Tungsten Information; Published on Tuesday, 04 November 2014 18:45

Tungsten carbide boring cutter, a kind of boring tool with a round handle, can be applied in inner bore processing, chambering, and so on, and is specially used in rough, semi-finish and finish processing towards existing bores.

Installation steps of tungsten carbide boring cutters:

I. Tied the sheath to the shank by bolt.

II. Install the fine boring cutter base on the sheath.

III. Install the clump weight on the sliding block.

IV. Cutting tools adjustments:

(1) Loosen the bolt.

(2) Make rough adjustments towards the tool apron.

(3) Tighten the bolt.

V. Adjust the clump weight in the same way and adjust the dynamic balance.

VI. Tighten the bolt, try boring, measure the size of the processed bore and compare it to the required size, and then figure out the deviation value of number.

VII. Loosen the bolt and screw the dial.

VIII. Tighten the bolt and rework the workpiece to the required size.

Precautions during tungsten carbide boring cutter installation:

Do not overexert the adjustment towards fine boring cutter bits; do not touch places sealed up by red lacquer; do maintenance regularly and add lubricating oil.

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Reins Tungsten Nail Sinkers

Details: Category: Tungsten Information; Published on Tuesday, 04 November 2014 08:56

When it comes to weighting a lure, there is no other choice but reins tungsten nail sinkers to get the job done! In doing so, you can easily get the bait down to the "perfect" level where it has a chance to be consumed in one gulp! With its popular barbs, reins tungsten nail sinkers are sure to stay firmly in place throughout the cast.

Reins tungsten nail sinkers help you fine tune your baits, they are used on soft plastics or on wood plugs. Commonly, rein tungsten nail sinkers can be used in the nose of a worm to give you just the right action, or maybe you need to balance that frog or plus to swim just right.

Why Tungsten

Tungsten, with the density rages from 16.5 to 18.5, is widely used by more and more manufacturer in making reins nail sinkers. Reins tungsten nail sinkers have better penetration power compared with other materials made nail sinkers, such as lead, brass, est. Besides, reins tungsten nail sinkers are environment friendly, which is an important factor nowadays.

tungsten-nail-sinkers

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Tungsten Carbide Angle End Mill Introduction

Details: Category: Tungsten Information; Published on Monday, 03 November 2014 18:23

Tungsten carbide angle end mill, installed in vertical milling machines, is normally used in milling grooves of relatively small workpieces. It is a kind of rotary cutting tool with on or more teeth and is compatible with processing materials like die steel, cast iron, carbon steel, alloy steel, tool steel and general steel materials.

During milling, each tooth of tungsten carbide angle end mill intermittently cuts off workpiece allowance in proper order. It is used in machining grooves and step surface with its teeth on the circumference and end surface. When it works, it cannot feed along the axial direction, but when there are end teeth through the center, it can do axial direction feeding.

Characteristics of tungsten carbide angle end mills:

I. It is used in milling metal grooves and step surface.

II. It is widely used in rough, semi-finish and finish milling of workpieces.

III. Its cutting edge, made through complete grinding, is of smooth active surface, little chip removal resistance, high intensity and high precision.

IV. It can work normally with overload under high temperature up to 450℃-550℃.

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Tungsten Carbide Die Milling Cutter Introduction

Details: Category: Tungsten Information; Published on Monday, 03 November 2014 18:19

Tungsten carbide die milling cutter, also called tungsten carbide high-speed mixed milling cutter or tungsten carbide rotary file, can be compatible with high-speed electrical machines or air tools. It can be used in the finish machining of various kinds of metal die cavities and inner bore surface of machine parts; cleaning the trimming, burr, welding line of castings, forgings and welding; chamfering, rounding, groove and keyway machining of different types of machine parts; sleeking of impeller passages; and cleaning of pipeline.

Tungsten carbide die milling cutters gain wide applications in mechanical, automobile, shipping, chemical, carving and other industrial sectors, and achieve good effects. Its main applications include:

I. Finish machining of various kinds of metal mould cavities, like shoe mold.

II. Handicraft carving of various kinds of metal and nonmetal.

III. Cleaning the trimming, burr, welding line of castings, forgings and welding, such as in casting machining factories, shipyards, automobile factories, etc.

IV. Chamfering, rounding, groove and keyway machining of different types of machine parts, such as in machinery factories, repair factories, etc.

V. Sleeking of impeller passages, such as in automobile engine factories.

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Tungsten Carbide Cutting Tool CVD Coating Technology Development

Details: Category: Tungsten Information; Published on Monday, 03 November 2014 18:17

Tungsten carbide cutting tool coating previously usually adopted high-temperature chemical vapor deposition (GTCVD) technology. According to the constituents of the sediment, clean gases like H2、CH4、N2、TiCl4、AlCl3、CO2, after mixed in a certain proportion, are applied on the blade surface of tungsten carbide cutting tool with certain temperatures (generally 1000~1050℃) in the deposition system under ordinary or negative pressure. Up to now, HTCVD is still the most popular technology in this area. In addition, there is also anther technology called plasma chemical vapor deposition (PCVD) applied in tungsten carbide cutting tool coating. Due to its relatively low technological temperature (700~800℃), it reduces the bend resistance of the blade.

Later on, multilayer coating with different combinations have been developed, such as TiCN/Al2O3、TiCN/TiC/TiN、TiCN/TiC/Al2O3、TiCN/Al2O3/TiN、TiCN/TiC/Al2O3/TiN、TiCN/Al2O3/TiCN、TiN,TiC/TiCN/TiN、TiN/TiCN/TiN and so on.

We can clearly see that in recent years, TiCN or TiN are often used as the bottom layers due to the improvement of tungsten carbide substrate. For example, gradient structure is taken, so that it is possible to take TiCN or TiN as the bottom layers. Besides, TiN is not suitable to be applied alone, because TiN has less improvement in its hardness compared with tungsten carbide. That is why TiN has to be used in combination with TiC, TiCN and Al2O3.

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High-Density Heavy Metals for Radiation Shield

Details: Category: Tungsten Information; Published on Monday, 03 November 2014 14:02

Heavy metal alloy composed primarily of tungsten. Heavy metals manufactured by our advanced powder metallurgy feature very high density and excellent radiation shielding as well as mechanical strength and machining/processing characteristics. These metals have been well accepted as alternative materials of lead that has adverse impact on environment. They are also used for various weights and rotors and for their excellent shielding performance, in a variety of fields including medical equipment and nuclear power plants.

Compared with other metals, our heavy metals are far superior in terms of absorption of high-energy beams and radiation. They have extremely low gas emissions in high vacuum and are superior in mechanical strength and processing workability. They are ideal materials for such applications as medical equipment, nuclear power plants and other radiation shielding applications.

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Tungsten Alloy for Efficient Radiation Protection

Details: Category: Tungsten Information; Published on Monday, 03 November 2014 13:59

The tungsten alloy reliably shields against X-rays and gamma radiation. With its new production process and great expertise in the materials field, PLANSEE has made the manufacture of shielding components particularly cost-effective.

Whether in the world of medical or industrial X-ray technology, radiotherapy or nuclear power stations: Wherever high-energy radiation is used, it is vital to protect people against it.

The denser the material, the better able it is to protect from radiation. That is why heavy elements absorb X-rays and gamma radiation particularly well. Lead is still the most frequently used shielding material. Because it is a very soft material, it is mostly used only in combination with support structures made of steel.

Lead is a toxic material that is harmful to the environment and humans. The onerous recycling process makes lead expensive despite the low initial procurement costs. Many enterprises are therefore looking for a suitable alternative for providing reliable radiation protection.

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