Tungsten Information

Tungsten Carbide Indexable Turning Tool Lever-type Clamping Introduction

Details: Category: Tungsten Information; Published on Tuesday, 11 November 2014 16:48; Hits: 298

The lever-type clamping structure of tungsten carbide indexable turning tools is the most commonly used clamping structure at home and abroad, in which the blade is clamped to the toolbar according to lever principle. When the operator turns the screw, the clamping force will be produced through the lever, and then the blade will be located in the cutter groove side. When the operator removes the screw, the blade will be loosened, and the semicircular cylinder-shaped leaf spring can keep the shim position still. In this structure, due to the leverage, the blade can get acting force in horizontal direction during clamping, which can press one side of the blade onto the side of cutter groove. Through this, the blade can be tightly clamped.

The characteristics of lever-type clamping structure of tungsten carbide indexable turning tools: high location precision, firm clamping, reasonable stress, convenient in use, poor manufacturability. It is more suitable for mass production.

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Tungsten Carbide Indexable Turning Tool Eccentric Clamping Introduction

Details: Category: Tungsten Information; Published on Tuesday, 11 November 2014 16:46; Hits: 352

Eccentric clamping structure of tungsten carbide indexable turning tools has gained increasingly wide applications due to its advantages of simple structure, convenient and reliable clamping and so on.

In the eccentric clamping structure of tungsten carbide indexable turning tool, blade is clamped to toolbar by using an eccentric pin on the upper screw. This structure is convenient to operate but can not perform bilateral positioning.

When the eccentricity is too small, it requires higher blade precision, but when the eccentricity is too large, the blade may be easily loosened under the impact of cutting force. Therefore, the eccentric clamping structure of tungsten carbide indexable turning tools is more suitable for continuous smooth cutting.

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Tungsten Carbide Indexable Turning Tool Introduction

Details: Category: Tungsten Information; Published on Tuesday, 11 November 2014 16:44; Hits: 311

Tungsten carbide indexable turning tool, with three or more indexable cutting edges, is formed by clamping the tungsten carbide indexable insert to the toolbar using mechanical method. It is composed of toolbar, blade, shim, and clamping structure. When one of its cutting edges wears, operators can loosen the clamping structure, switch to another cutting edge, and clamp it again. When the cutting edges all wear off, the indexable insert then can be replaced by another one of the same kind. It can avoid the defects after welding in welded turning tools. Therefore, tungsten carbide indexable turning tools can allow full play to the original cutting properties of blade materials and thus help extend the tool life. Tungsten carbide indexable turning tool has three main clamping structures: eccentric clamping structure, lever-type clamping structure and wedge-type clamping structure.

Tungsten carbide indexable turning tool is a kind of advanced cutting tool, because it do not need to be reground and its blade can be easily replaced, which help greatly reduce the regrinding cost and improve cutting efficiency.

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Tungsten Dropshot Weights-2

Details: Category: Tungsten Information; Published on Tuesday, 11 November 2014 08:59; Hits: 317

Tungsten dropshot weights create twice the sound of lead as it contacts structure, and they sink quickly with the properties of high mass and low volume. They are environmentally safe, because of the material tungsten is non-toxic, which is more important for us.

Tungsten dropshotweights are available in a teardrop model and a thin model.

Tungsten dropshot weights of Chinatungsten Online feature a high quality clip designed to hold fishing line without tying a knot, yet allows line to slip out when the weight becomes snagged allowing the rest of the rig to remain intact.

tungsten-drop-shot-weight

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Tungsten Dropshot Weights-1

Details: Category: Tungsten Information; Published on Tuesday, 11 November 2014 08:55; Hits: 285

Tungsten dropshot weights have really turned into an effective and widespread way of rigging a worm and catching fish.

Tungsten dropshot weights feature a high quality clip designed to hold the line without tying a knot and slipping off the rig when they get hung up without breaking off the hook. Then, all you have to do is clip on another weight and your back to fishing without re-tying the whole rig.

Because tungsten is denser than lead, so tungsten dropshot weights offers a smaller more compact design as compared to its lead counter part at the same physical weight, about 25% smaller than conventional lead weights.

Tungsten dropshot weights are extremely dense providing anglers the sensitivity they need when fishing soft plastics. They can transmit the feel of the bottom structure extremely well, allowing you to have more sensitivity by detecting subtle bottom changes that with lead would go unnoticed.

tungsten-drop-shot-weight

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Tungsten Carbide Saw Blade’s Common Specifications

Details: Category: Tungsten Information; Published on Friday, 07 November 2014 16:53; Hits: 334

Tungsten carbide saw blade has many types of specifications, and some common ones will be introduced in the following.

Generally speaking, left and right teeth should be applied in the sawing of chipboard and particleboard of medium density, while horizontal ladder tooth is normally adopted in the sawing of laminated board and fire-proof plate. The external diameter of tungsten carbide saw blade is often with Ф300-350mm according to different types of circular sawing machines and the saw blade thickness is connected with diameters (Ф250-300mm with a thickness of 3.2mm and over Ф350mm with a thickness of 3.5mm). Computer-controlled material handling machine usually adopts tungsten carbide saw blades with larger diameter and thickness (350-450mm of diameter and 4.0-4.8mm of thickness) due to its high power of sawing, and normally applies horizontal ladder tooth to reduce chipping and saw notch. As for maintaining a smooth grooving in the slot base, flat teeth or composite tooth form of left and right teeth should be adopted.

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How to Identify High-quality Tungsten Carbide Saw Blade

Details: Category: Tungsten Information; Published on Friday, 07 November 2014 16:51; Hits: 324

Tungsten carbide saw blade, made up of saw blade and saw teeth, is especially used for cutting and grooving metal materials. Its quality is closely related to the product quality, so, how to identify high-quality tungsten carbide saw blade?

The alloy particles contained in high-quality saw blades is thicker and larger which allows for many times of cutter sharpening on carbide teeth and longer service life. The welding quality of tungsten carbide is also very important. Thin and uniform welding lines are required, which can enable the saw teeth to withstand larger cutting force. Also, a high-quality saw blade is also very essential, because it adjusts the rotation, and should not only pass the cutting force, but also maintain the working stability. High-quality tungsten carbide saw blades has static geometry size, accuracy and dynamic performance as well. When the saw blade conducts cutting continuously, the heat generated will be passed to saw blade and lead to its increasing temperature, under which, a high-quality saw blade can still remain its precision while the inferior one will warp and has lower precision.

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Tungsten Carbide Titanize Cutting Tool Cutting Fluid Usage Problem

Details: Category: Tungsten Information; Published on Friday, 07 November 2014 16:49; Hits: 320

Tungsten carbide cutting tool, in recent years, is widely applied in the machinery processing. But due to its high price, the operators often adopt cutting fluid in its machining in order to save tools and improve machining speed, which has caused a lot of problems to the machine tool maintenance.

Generally speaking, cutting fluid can help improve cutting speed, especially of high-speed steel cutting tools, with an average increased speed rate about 30％～40％. However, when it comes to tungsten carbide titanize cutting tools, whether to apply cutting fluid or not has to be considered carefully. The reasons are as follows:

I. Tungsten carbide titanize cutting tool can withstand high temperature up to 1 000℃, but the cutting fluid can only lower the tool temperature by 60～90℃, which is of almost no influence on the tool.

II. Tungsten carbide titanize cutting tool has high cutting speed and high cutting temperature as well, under which, cutting fluid oil film will be damaged and achieve a poor lubrication.

III. Then cleaning effect of cutting fluid is still of some help to tools, but the dirt washed away will do harm to sliding boxes and tool carriers, which has poor leakproofness, and thus lowers the machine tool precision.

IV. Many operators tend to add water to it during machining, which causes that cutting fluid not only has no rust prevention ability, but also lead to rust forming on workpiece and machine tools.

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Tungsten Carbide Cutting Tool Crack Analysis

Details: Category: Tungsten Information; Published on Friday, 07 November 2014 16:47; Hits: 267

The higher intensity the tungsten carbide cutting tool has, the lower the risk that it will produce cracks. However, in the actual production process, even the carbide material with highest intensity and abrasion resistance will produce cracks. So, what are the reasons for this?

Tungsten carbide cutting tool cracks are formed because the welding stress exceeds the intensity limit of tungsten carbide cutting tools. If the tungsten carbide cutting tool bends, then there will be tensile stress along the direction of carbide blade thickness. When the cutting tool is welded, it is not conducted on the same plane, but on several planes. In addition, when tungsten carbide suffers rapid heating or cooling, the blade surface temperature will be pretty unevenly and thus obvious instantaneous stress can happen, which will easily results in tungsten carbide cutting tool cracks. Therefore, the heating or cooling of the cutting tools should be conducted slowly.

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Tungsten Carbide Drill Bit Selecting

Details: Category: Tungsten Information; Published on Friday, 07 November 2014 16:45; Hits: 322

Tungsten carbide drill bit is a kind of cutting tool used in the drilling of through-holes and blind holes in solid materials, or the chambering of the existing holes. During tungsten carbide drill bit selecting, the factors as follows should be taken into consideration.

I. Machining stability

When selecting tungsten carbide drill bits, the stability of machine tools should be considered. And therefore, the principal axis, fixture of machining tools should be tested. In addition, the stability of drill bit itself should also be considered.

II. Generally speaking, the smaller the hole diameter is, the smaller the tolerance is. The solid tungsten carbide drill bit, with the highest machining precision, is the best choice for machining high precision holes, while the welded tungsten carbide drill bit is more suitable for the machining of holes of common precision requirement. Tungsten carbide indexable drill bit, with lower machining precision, is generally used in the machining of holes with low precision requirement.

III. Machining cost of each hole

The productivity and machining cost of each hole are the most important factors in drilling machining. In order to improve productivity, tungsten carbide drill bit manufacturers are dedicated to the studies on machining methods of many operation sequences and develop drilling tools with higher feeding rate and higher revolving speed.

IV. Chip removal and cooling fluid

Chip removal problem should be attached much more importance on the tungsten carbide drill bit selecting. In fact, the most commonly seen problem in drilling is chip removal difficulty. In addition, proper cooling fluid types, flow and pressure that match the drill bit diameter should be chosen.

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