Tungsten Carbide Cylindrical Milling Cutter Introduction
- Category: Tungsten Information
- Published on 24 October 2014
Tungsten carbide cylindrical milling cutter, with its teeth located on the cutter circumference, is classified into the straight tooth cutter and the end mill with spiral teeth according to its tooth shapes, while into the coarse-tooth milling cutter and the fine-tooth milling cutter according to its teeth number. The coarse-tooth milling cutter with spiral teeth has fewer teeth but with high intensity and larger chip space, and thus is suitable for roughing machining. The fine-tooth milling cutter, on the contrary, is more suitable for finish machining.
The milling characteristics of tungsten carbide cylindrical milling cutter are as follows:
I. The cutter rotates continuously and allows relatively high milling speed which contributes to its high productivity.
II. When doing continuous rotation, every cutter tooth is rotating, therefore, vibration is inevitable. In addition, during high-speed milling, the teeth have to suffer from periodic thermal shock, which can easily result in cracks forming and blade tipping.
III. Because there are many cutter teeth, the total length of the cutting edge is actually quite large, which helps improve tool service life and productivity.
IV. According to different machining conditions, different milling ways can be adopted in order to extend tool life and improve productivity, such as up milling,climb milling, symmetric milling and asymmetry milling.
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Tungsten Carbide Plain Milling Cutter Introduction
- Category: Tungsten Information
- Published on 24 October 2014
There are several main types of tungsten carbide plain milling cutters:
I. Flat-end milling cutters, which are used for roughing milling to remove large amount of unwanted materials.
II. Ball milling cutters, which are used for semi-finish and finish milling of hook face.
III. Formed milling cutters, which includes chamfer cutters, T-shaped milling cutters, toothed cutters, and inner R cutter.
IV. Chamfer cutters, whose shape is like a chamfer, and has two types, with one type being used to mill round chamfers, while another being used to mill oblique chamfers.
V. T-shaped milling cutters, which can be used for T-shaped slot milling.
VI. Toothed cutters, which can be used to mill various kinds of tooth shapes, such as gears.
VII. Rough surface milling cutters, which is specially designed for rapid machining of aluminum copper alloy.
Tungsten carbide plain milling cutter, with high hardness, strong cutting force, can be applied in the machining of difficult-to-cut materials like stainless steel, titanium alloy and so on, and can greatly increase rotating speed and feeding speed, and thus improving the productivity.
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Tungsten Carbide Rough Surface Milling Cutter Introduction
- Category: Tungsten Information
- Published on 24 October 2014
Tungsten carbide rough surface milling cutter, with one or more teeth, is widely used in the roughing milling machining of slots,etc. It can work with materials like stainless steel, aluminum alloy, die steel, tool steel, carbon steel, alloy steel, cast iron and general iron materials.
Tungsten carbide rough surface milling cutters can be classified into several categories according to its coatings, such as TICN coating, TIN coating, TIALN nanometer super-hard coating, uncoated ones and so on, while there are two types of normal length and super length when according to its length.
The characteristics of tungsten carbide rough surface milling cutter include:
I. Suitable for roughing machining.
II. High machining efficiency.
III. Good chip removal ability with large amount of chip removal.
IV. High metal cutting rate.
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Tungsten Carbide End Mill Clamping
- Category: Tungsten Information
- Published on 24 October 2014
Tungsten carbide end mill in machining center normally adopts spring jacket clamping. During the milling, end mills may sometimes stretch out from toolholders or even fall off, causing the pieceworker scrapping. It is mainly because of the existing of oil slick between toolholder inner hole and the outer diameter of end mill handle, which results in the smaller clamping force. Therefore, before the end mill clamping, the end mill handle and toolholder inner hole need to be cleaned up.
However, even though the handle and the toolholder are both clean, when the end mill diameter is oversize, there could still be blade falling accidents, so when this happens, handles without gaps and the corresponding side lock method should be adopted.
The end mill being clamped may break at the edge of the toolholder during machining, and reason generally is that the toolholder has been used for a long time, resulting in a cone-shaped damage in its edge part. Therefore, the old toolholder should be replaced with a new one as soon as possible.
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Tungsten Carbide Ball End mill Introduction
- Category: Tungsten Information
- Published on 24 October 2014
Tungsten carbide ball end mill, commonly equipped in milling machines, has a ball-shaped blade and is widely applied in various hook face milling and arc groove machining. It can perform normal operation under high temperature condition. As a type of end mill and a kind of die mill, it is also known as R end mill. It can be classified into two types: cylinder-shaped ball end mill and cone-shaped ball end mill.
Characteristics of tungsten carbide ball end mill:
Milling materials applied: die steel, cast iron, carbon steel, alloy steel, tool steel and general iron materials.
High temperature resistance characteristic: It can maintain its cutting property under a temperature up to 450-550/500-600 degrees Celsius.
Tungsten carbide ball end mills account for a significant proportion of finish machining cutters and is widely applied in various industries like aerospace, automobile, shipbuilding and casting, plastic molding, medical equipment, and so on.
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Gold Plated Tungsten Alloy Paper Weight
- Category: Tungsten Information
- Published on 24 October 2014
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
- Category: Tungsten Information
- Published on 23 October 2014
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
- Category: Tungsten Information
- Published on 23 October 2014
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
- Category: Tungsten Information
- Published on 23 October 2014
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
- Category: Tungsten Information
- Published on 23 October 2014
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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