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| Tooth Form: | Spiral Tooth |
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Product Name
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for 60 HRC Hardened steel 4F-D20-55-150mm solid Tungsten Carbide End Mill |
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Material
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tungsten carbide
|
|
Color
|
grey
|
|
Standard
|
DIN GB ISO JIS BA ANSI
|
|
Grade
|
YL10.2,YG10X,YG12X,YG15,YG20,YG10,YG8,YG8 etc
|
|
Brade
|
ZZUP
|
|
Grain size
|
0.6um |
|
Used
|
for milling 45HRC,50HRC,60HRA metals
|
|
Grade
|
Density(g/cm3)
|
Hardness (HRA) |
T.R.S (MPa)
|
Grain size (μm)
|
Composition (%) |
Equal to ISO
|
| YU12 | 14.1~14.15 | .≥92.5 | ≥4000 | 0.2~0.5 | 12% CO 88% WC | K40~K50 |
|
YL10.2
|
14.4~14.6
|
≥92.2
|
≥4000
|
0.6~0.8
|
10% CO 90% WC
|
K20~K30
|
|
YG6X
|
14.85~15.0
|
≥92.0
|
≥3860
|
0.8~1.0
|
6% CO 94% WC
|
K05
|
|
YG15
|
14.0~14.1
|
≥85.0
|
≥2800
|
1.2~2.0
|
15%Co 85% WC
|
K30~K40 |
|
YG10
|
14.5~14.6
|
≥85.5
|
≥2600
|
1.2~2.0
|
10%Co 90% WC
|
K20
|
|
YG8
|
14.65~14.85
|
≥89.5
|
≥2320
|
1.2~2.0
|
8% CO 92% WC |
K20
|
|
YG6
|
14.85~15.05
|
≥90.0
|
≥2150
|
1.2~2.0
|
6% CO 94% WC |
K10
|
End milling cutter is one of the most widely used CNC machine tools, end milling cutter cylindrical surface and end face have cutting cutter, they can be cut at the same time, can also be cut separately. It is mainly used for plane milling, groove milling, step milling and profile milling.
There are many kinds of milling cutter shapes, ordinary milling machine and CNC milling machine processing groove and linear profile, milling and boring machining center processing cavity, core, surface shape/contour with.
Milling cutter is generally divided into:
1, flat end milling cutter: fine milling or rough milling, milling groove, remove a large number of blank, small area horizontal plane or contour fine milling;
2, ball head milling cutter: surface semi-finishing milling and finishing milling; The knife can fine mill small chamfering of steep/straight wall.
3, nose milling cutter: surface change is small, small sag area is less, relatively flat area is more rough milling.
4, flat end milling cutter: with chamfering, can do rough milling to remove a large number of blank, but also fine milling fine flat surface (relative to the steep surface) small chamfering.
5, forming milling cutter: including chamfering cutter, T-shaped milling cutter or drum cutter, tooth cutter, R knife.
6, chamfering knife: chamfering knife shape and chamfering shape is the same, divided into milling round chamfering and chamfering milling cutter.
7, T knife: T groove can be milling.
8, tooth type knife: milling out a variety of tooth type, such as gear.
9, rough cutter: for aluminum copper alloy cutting design of rough milling cutter, can be processed quickly.
Milling cutters commonly have two materials: high speed steel, carbide. The latter relative to the former high hardness, strong cutting force, can improve speed and feed rate, improve productivity, so that the knife is not obvious, and processing stainless steel titanium alloy and other difficult to process materials
Clamping of end milling cutter
Machining center with the end milling cutter most of the spring clip set clip, use in the cantilever state. In the process of milling, sometimes there may be end milling cutter gradually extended from the tool clip, or even completely dropped, resulting in the phenomenon of workpiece scrap, the reason is generally because of the existence of oil film between the tool clip hole and end milling cutter handle diameter, resulting in insufficient clamping force. End milling cutter factory is usually coated with anti-rust oil, if the use of water-soluble cutting oil cutting, knife clip hole will be attached to a layer of mist oil film, when there is oil film on the handle and knife clip, knife clip is difficult to firmly clamp the handle, in the processing of neutral milling cutter is easy to loose fall. Therefore, before clamping end milling cutter, the end milling cutter handle and knife clip hole should be cleaned with cleaning liquid, dry and then clamping.
When the diameter of the end milling cutter is larger, even if the handle and the knife clip are very clean, or may happen to drop the knife accident, then should choose the handle with cutting gap and the corresponding side locking way.
Another problem that may occur after the end milling cutter clamp is that the machining neutral milling cutter is broken at the port of the cutter clamp. The reason is generally because the tool clamp is used for too long, and the port part of the tool clamp has been worn into a cone. At this time, a new tool clamp should be replaced
vibration
Because there is a small gap between the end milling cutter and the cutter clamp, the vibration of the cutter may occur in the process of machining. The vibration will make the cutting edge of end milling cutter is not uniform, and the cutting expansion is larger than the original value, affecting the machining accuracy and tool life. But when the groove width of the processing is small, it can also purposefully make the tool vibration, by increasing the amount of cutting expansion to obtain the required slot width, but in this case, the maximum amplitude of the end milling cutter should be limited to 0.02mm or less, otherwise it can not be stable cutting. In normal machining neutral milling cutter vibration as little as possible.
When the tool vibration occurs, it should be considered to reduce the cutting speed and feed speed, if both have been reduced by 40% after there is still a large vibration, it should be considered to reduce the tool load.
If the machining system appears resonance, its reason may be the cutting speed is too large, the feed speed is small, the tool system rigidity is insufficient, the workpiece clamping force is not enough and the workpiece shape or workpiece clamping method and other factors caused by, at this time should be taken to adjust the cutting dosage, increase the tool system stiffness, improve the feed speed and other measures.
The cutting blade
In the CNC milling of the workpiece cavity such as the mold, when the cutting point is the concave part or the deep cavity, the extension of the end milling cutter should be lengthened. If the use of long edge type end milling cutter, because of the tool deflection is large, easy to produce vibration and lead to tool breakage. Therefore, in the process of processing, if only the blade near the end of the tool to participate in cutting, it is best to choose the total length of the tool is longer short blade long handle type end milling cutter. When using large diameter end milling cutter to process workpiece on horizontal CNC machine tool, due to the large deformation caused by the tool weight, more attention should be paid to the end edge cutting problems. When it is necessary to use long - edge end milling cutter, the cutting speed and feed speed should be greatly reduced.
Cutting speed
The choice of cutting speed mainly depends on the material of the machined workpiece; The choice of feed speed mainly depends on the material of the workpiece to be processed and the diameter of the end mill. The cutting tool samples of some foreign tool manufacturers are attached with the selection table of cutting parameters for reference. However, the selection of cutting parameters is also affected by many factors such as machine tool, tool system, workpiece shape and clamping mode, so the cutting speed and feed speed should be adjusted appropriately according to the actual situation.
When the tool life is the priority factor, the cutting speed and feed speed can be appropriately reduced; When the chip off-edge condition is not good, the cutting speed can be appropriately increased.
Inverse down milling
The use of down milling is beneficial to prevent blade damage and improve tool life. But there are two points need to pay attention to: (1) if the use of ordinary machine tool processing, should try to eliminate the clearance of the feeding mechanism; (2) When the workpiece surface residual oxide film formed by casting and forging process or other hardening layer, it is appropriate to use reverse milling.
The cutting tool material
Carbide end milling cutter has good wear resistance in high speed cutting, but its application scope is not as wide as that of high speed steel end milling cutter, and the cutting conditions must strictly meet the requirements of the tool.
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