Gold Plated Tungsten Alloy Paper Weight
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- Category: Tungsten Information
- Published on Friday, 24 October 2014 08:47
- Hits: 305
Gold plated tungsten paper weight
Gold plated tungsten alloy paper weights are one of those items that you really don't realize you need until you have one. Now the executive can keep those papers in place or mark special piles in style.
Gold plated tungsten alloy paperweights can be engraved or imprinted with company logo.
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Tungsten Carbide Drill Bits Sharpening
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- Category: Tungsten Information
- Published on Thursday, 23 October 2014 18:06
- Hits: 336
When tungsten carbide drill bits get dull, the easiest solution is usually to just replace them. But since tungsten carbide drill bits are relatively expensive tools, it may be worth a few minutes of your time to go ahead and sharpen the bit yourself. This is easily done by gently moving the ridges of the bit against a spinning grinding wheel. Because tungsten carbide is kind of material of high hardness, you will need to make sure you use a diamond-surface grinding wheel to affect the hard metal.
Instructions to sharpen a tungsten carbide drill bit:
I. Put on safety goggles and canvas gloves. The goggles protect your eyes from sparks and debris. The gloves protect against accidentally pushing your fingers against the wheel and against burning yourself if the bit gets hot.
II. Turn on your grinding wheel. Hold the side of the drill bit next to the broad side of the wheel, so the bit is parallel to it.
III. Holding the bottom of the tungsten carbide drill bit, press the side of the bit lightly against the side of the spinning wheel.
IV. Turn the bit clockwise while moving it downward on the wheel. Make sure the surface of the wheel is coming in contact with the cutting ridge of the blade. You will be able to distinguish the parts of the bit that have been sharpened by the brighter shine on the metal. If you feel the bit getting hot, lift it from the wheel until it cools.
V. After you have sharpened the ridges of the tungsten carbide drill bit, touch any angles at the tip to the wheel to smooth them out and sharpen the edges. Take care to press only the flat side of each angle to the wheel, and not the point.
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Tungsten Carbide Milling Cutter Selecting
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- Category: Tungsten Information
- Published on Thursday, 23 October 2014 18:03
- Hits: 291
Tungsten carbide milling cutters are more expensive than high speed steel, but last longer, and can be run much faster, so prove more economical in the long run. Tungsten carbide milling cutter selecting is not a simple task. There are many variables, opinions and lore to consider, but essentially the machinist is trying to choose a tool which will cut the material to the required specification for the least cost. There are four main factors to consider when selecting a tungsten carbide milling cutter.
I. Diameter:
Larger tools can remove material faster than small ones, therefore the largest possible cutter that will fit in the job is usually chosen. When milling an internal contour, or concave external contours, the diameter is limited by the size of internal curves. The radius of the cutter must be less than or equal to the radius of the smallest arc.
II. Flutes:
More flutes allows a higher feed rate, because there is less material removed per flute. But because the core diameter increases, there is less room for swarf, so a balance must be chosen.
III. Coating:
Coatings, such as titanium nitride, also increase initial cost but reduce wear and increase tool life. TiAlN coating reduces sticking of aluminium to the tool, reducing and sometimes eliminating need for lubrication.
IV. Helix angle:
High helix angles are typically best for soft metals, and low helix angles for hard or tough metals.
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Tungsten Carbide Ball Nose Cutter Inroduction
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- Category: Tungsten Information
- Published on Thursday, 23 October 2014 18:00
- Hits: 319
Tungsten carbide ball nose cutters or ball end mills are similar to slot drills, but the end of the cutters are hemispherical. They are ideal for machining 3-dimensional contoured shapes in machining centres, for example in moulds and dies. They are sometimes called ball mills in shop-floor slang, despite the fact that that term also has another meaning. They are also used to add a radius between perpendicular faces to reduce stress concentrations.
There is also a term bull nose cutter, which refers to a cutter having a corner radius that is fairly large, although less than the spherical radius (half the cutter diameter) of a ball mill; for example, a 20-mm diameter cutter with a 2-mm radius corner. This usage is analogous to the term bull nose center referring to lathe centerswith truncated cones; in both cases, the silhouette is essentially a rectangle with its corners truncated (by either a chamfer or radius Don).
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Tungsten Carbide Worm Gear Hob Introduction
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- Category: Tungsten Information
- Published on Thursday, 23 October 2014 16:20
- Hits: 309
The tungsten carbide worm gear hob is typically used in turbine machining and its machining method is almost the same as that of the gear hob. What differentiates them is that during worm gear hob machining, the helix angle is not being moved while gear hob does. Because of this, when the worm gear hob with a large helix performs its machining, its clearance angle tends to be touched easily, making the machining become more difficult, so does its production.
The differences between tungsten carbide worm gear hob production and that of the gear hob are mainly as follows:
I. Reference circle requirements in worm gear hob production;
II. Tooth shape difference;
III. The helix angle is not being moved during worm gear hob machining, therefore, the axial pitch of worm gear hobs is just equal to that of gear hobs.
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Choosing Tungsten Carbide Milling Tool Cutting Speed
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- Category: Tungsten Information
- Published on Thursday, 23 October 2014 16:17
- Hits: 283
The choosing of tungsten carbide milling tool cutting speed is mainly based on the material type of the workpiece being processed while that of the rate of feeding is based not only on the material type of workpieces but also on the tool diameters. Cutting parameter lists may be attached to the cutter samples provided by some of the foreign cutter manufacturers for reference. However, the cutting parameter can also be affected by many other factors such as machine tools, cutter system, shapes of workpieces being processed, clamping pattern and so on, and therefore the cutting and feeding speed should be adjusted according to different practical situations. When the tool life is the first priority for consideration, the cutting and feeding speed then can be reduced to an appropriate extent, while if there is a poor chipping condition, the cutting speed can be increased to some extent.
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Tungsten Carbide Milling Tool Maintenance
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- Category: Tungsten Information
- Published on Thursday, 23 October 2014 16:15
- Hits: 345
The situation where tungsten carbide milling tool axial lead is close to or overlaps with the edge line of the workpiece can be quite serious. Therefore, operators should try their best to well perform the tool maintenance job, which includes matters as follows:
I. Checking the machine tool power and its stiffness to ensure that the milling tool diameter required can be performed in the machine tools.
II. Adopting correct milling tool teeth space suitable for the working procedure in case that too many blades engage with the workpiece, causing vibration during the cutting.
III. Making certain the load of each blade so as to achieve correct cutting effect when chips are plenty enough and thus reduce cutter abrasion.
IV. Choosing milling tool diameters suitable for the workpiece width.
V. Choosing the correct tool cutting edge angle.
VI. Placing milling tools correctly.
VII. Using cutting fluid only when necessary.
VIII. Abiding by the cutter maintenance regulations and monitoring the cutter abrasion condition.
The working efficiency can be greatly improved and tool service life be extended if the tungsten carbide milling tool maintenance is well guaranteed.
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Tungsten Carbide Indexable Insert Technical Requirements
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- Category: Tungsten Information
- Published on Thursday, 23 October 2014 16:12
- Hits: 310
The technical requirements of unpunched tungsten carbide cutting tools or that with a circular hole or counter bore are as follows:
I. The blade back flate’s inward concave should be not more than 0.05mm, while the outward concave not more than 0.03mm.
II. The blade’s fundamental plane only allows inward concave with value not more than 0.05mm in unpunched tools or tools with a circular hole, while allows outward concave with a value not more than 0.03mm in tools with a counter bore.
III. There should not be any defects unfavorable to usage on tungsten carbide indexable insert surface as well as defects in the cutting edge part.
IV. The main properties and structure of blades should accord with the regulations in YB849-75 Tungsten Carbide Grades or other relevant standards.
V. The cross-section part of blades should be in uniformity without any defects that may do harm to usage.
VI. Materials newly developed or introduced should be of higher properties than what stipulated in YB849-75 standards or accord with companies recommended values.
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Tungsten Carbide Cutting Tool Precautions
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- Category: Tungsten Information
- Published on Thursday, 23 October 2014 16:10
- Hits: 292
When using tungsten carbide cutting tools , operators should pay attention to some precautions as follows:
I. Tungsten carbide cutting tools are made from hard and brittle materials, therefore, diamond grinding wheel should be applied in the finish machining.
II. Due to its material characteristics of hardness and brittleness, the tungsten carbide cutting tool may break when suffering from great impact or clamp force.
III. Tungsten carbide has relatively low coefficient of thermal expansion, therefore, when produced into hot or cold external members, if there are significant differences between the operating temperature and design value, cracks may come into being.
IV. Tungsten carbide cutting tools must be kept in a dry place, because the cutting fluid or other kinds of fluid may corrode it and thus reduce its tool intensity.
V. During the copper brazing of tungsten carbide blades, if the copper brazing temperature is too high or too low, the blade may fall off or generate cracks.
VI. After the tungsten carbide cutting tool grinding, operators should check carefully whether there are cracks or not on the surface.
VII. After the electromachining of tungsten carbide cutting tools, operators should check whether there are cracks or not on the cutter surface, or it may have a bad influence on the cutter intensity. If necessary, the cracks can be eliminated through accurate grinding.
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The Introduction of Tungsten Gold Plated Bar
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- Category: Tungsten Information
- Published on Thursday, 23 October 2014 08:48
- Hits: 303
Tungsten gold plated bar is bar made of tungsten and plated by gold. They are widely used as substation of gold bar as memento, jewelry and so on.
Tungsten gold plated bar has the properties of tungsten, which are high density, durable, hardness, oxidization resistance, and weak radioactive. What’s more, tungsten gold plated bar is environmental-friendly, which has been a reason for the popularity of people all over the world.
Tungsten gold plated bar has the surface of gold, which is smooth and bright as copper mirror, and able to reflect the images which are next to it. They are gold color, which is attractive and pleasant to eye.
Tungsten gold plated bar can be not only manufactured with gold plated only, but also with letters engraved on it. And the letters can be chosen by customers or engraved according to customers’ drawings.
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