End Mills For Stainless Steel Spiral Angle Of The Choice Of The Door, Very Knowledgeable!
 Jul 15, 2020|View:567

End Mills For Stainless Steel Spiral Angle Of The Choice Of The Door, Very Knowledgeable!

 

The basic edge shape (spiral groove shape) of end mills for stainless steels can be divided into straight shape and spiral shape. Spiral angle can be divided into 30,45,50° and so on, the variety is rich and varied. Compared with the straight edge, the spiral edge end mill has the advantages of light cutting, smooth cutting, high efficiency and wide application range, so it is widely used in milling. Now let's talk about how to distinguish between.


1. The role of Helix Angle

The greater the spiral angle of the end mills for stainless steel, the longer the contact length between the workpiece and the cutting edge. This reduces the load on the cutting edge per unit length and thus extends the tool life. But at the same time, the cutting resistance will increase, so we must consider the use of high rigid grip handle.

 

End mills for stainless steels with small spiral angle:

Cutting edge length (blue line part length) something short

Cutting edge length (blue line part length) something short


End mills for stainless steels with large spiral angle:

Length of cutting edge (length of red thread)

Length of cutting edge (length of red thread)

2. Induction of Helix angle characteristics

 Induction of Helix angle characteristics

Carbide end mills look something like this


 

Carbide end mills look something like this

Special Spiral Angle

 

There are ordinary blade, conical blade, rough cutting edge

 There are ordinary blade, conical blade, rough cutting edge

Spiral angle and cutting resistance

 

The tangential cutting resistance decreases with the increase of Helix and angle, and the axial cutting resistance increases with the increase of Helix Angle.

 

Angle of Helix and angle of rake

 

With the increase of Helix Angle, the actual rake angle of the milling cutter increases and the cutting edge becomes sharper.

 

Screw Angle and accuracy of machined surface

In general, the verticality and plane tolerance of machined surface increase with the increase of Helix Angle, but after the helix angle is more than 40 ° , it decreases with the increase of Helix Angle.

 

Screw Angle and tool life

On the other hand, when the Helix Angle is very small, the slight wear of the tool will obviously reduce the cutting performance of the tool and cause vibration, so the tool can not continue to be used. When the screw angle is too large, the tool rigidity becomes worse and the tool life decreases.

 

Angle of Helix and material to be cut

In the processing of soft materials with low hardness, a large helix angle is used to increase the rake angle and improve the sharpness of the cutting edge.

 

3. Spiral Angle selection

For the stainless steel with low thermal conductivity and high heat effect on the cutting edge, the use of large spiral angle end milling cutter is helpful to prolong the tool life.

 

In addition, the characteristic of finish machining surface is changed by the spiral angle. For example, the need for smooth finishing, sometimes can also be used large spiral angle end milling cutter. However, when using large spiral angle end milling cutter, the cutting resistance will increase, and the right spiral angle cutter will pull out force will also increase, so it is necessary to take corresponding measures, such as using the tool holder with high rigidity. Although the rigidity of the cutter is ensured, the small spiral angle end milling cutter is sometimes used when the rigidity of workpieces such as thin plate processing is low.

 

4. Large spiral end mills with 50° Helix Angle

Large spiral end mills with 50° Helix Angle

End Mills for side finish machining

Adopt multi-edge design, the rigidity of the tool is good, can minimize the amount of letting the tool when the side cutting.

The sharp point is treated with Sharp Angle Protection, which can restrain the edge collapse to the maximum extent.

 

5. 60° SPIRAL ANGLE END MILLS:

60° SPIRAL ANGLE END MILLS

Suitable for high speed cutting of SUS304 stainless steel and other hard-to-cut materials

For difficult cutting materials with low thermal conductivity and higher cutting edge temperature, the special shape of cutting edge can restrain the influence of cutting heat on cutting edge.

 

6. High efficiency roughing end mills for high speed machining

High efficiency roughing end mills for high speed machining

With 45° spiral angle and special groove shape, high speed machining and high wear resistance can be realized simultaneously.

Using fine tooth pattern chip breaker, the Surface roughness is good after processing.

The coating has good lubricity and heat resistance (heat resistance temperature 1100°c) .

 

Finally, the spiral angle is one of the main parameters of the spiral edge end mill. With the development of NC machining technology and flexible manufacturing technology, it is possible and convenient to change the size of spiral angle in tool manufacturing technology. If we further study the influence of Spiral Angle on the cutting performance of spiral edge end milling cutter, when manufacturing and selecting spiral edge end milling cutter, we should combine the performance of machine tool and fixture, according to the properties of the processed material, the processing precision, the processing efficiency, the cutting tool material and the cutting tool life and so on, the optimization of the spiral angle will undoubtedly play an important role in promoting the high-efficiency and high-precision milling.

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