Tag Archives: Helix angle

Geometric angle of cutting tool

Choosing the appropriate geometric angle of the tool can help reduce the vibration of the tool, and in turn, the workpiece is not easy to collapse.

tool grinding machines, geometric angle of cutting tool, land angle, Lip Relief Angle, helix angle, Tool grinding, tool angle change, tool cutting performance, angle of tool grinding

1. Land angle

With the decrease of the absolute value of negative land angle, the wear area of the rear tool surface has little change, but the overall trend is decreasing. With the increase of the rake angle, the strength of the tool edge is weakened, which leads to the decrease of the wear area. The flank wear is aggravated. When negative land angle machining is used, the cutting resistance is large and the cutting vibration is increased. When large positive land angle machining is used, the tool wear is serious and the cutting vibration is also large.

2. Lip Relief Angle

If the lip relief angle increases, the strength of the tool edge will decrease, and the worn area of the flank will gradually increase. After cutting tool lip relief angle is too large, cutting vibration is strengthened.

3. Helix angle

When the helix angle is small, the cutting edge which cuts into the graphite workpiece simultaneously on the same cutting edge has the longest cutting edge length, the greatest cutting resistance and the greatest cutting impact force, so the tool wear, milling force and cutting vibration are the greatest. When the helix angle is large, the direction of milling resultant force deviates from the surface of the workpiece to a great extent, and the cutting impact caused by the collapse of graphite material is intensified, so the tool wear, milling force and cutting vibration are also increased. Therefore, the influence of tool angle change on tool wear, milling force and cutting vibration is caused by the combination of land angle, lip relief angle and spiral angle, so more attention must be paid to the selection.

Through a large number of scientific tests on tool grinding, our tool grinding machines optimizes the geometric angle of the relevant tool in the design, thus greatly improving the overall cutting performance of the tool.

How should we distinguish the different helix angle of end milling cutter?

The helix angle of end milling cutter can be divided into 30°, 45°, 50° etc. There are many kinds of them. Now let’s look at how to distinguish between them.

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  1. The function of helix angle

The more helix angle of end milling cutter, the longer the contact length between workpiece and cutting lip will be. In this way, the load of cutting lip per unit length can be reduced, so the tool life can be extended. However, at the same time, the cutting resistance will be increased, so it is necessary to consider the use of clamping rigid high tool shank.

 

  1. The choice of helix angle

For hard cutting materials of stainless steel with low thermal conductivity and having a great influence on tip heat exposure, large helix angle of end milling cutter is adopted for cutting, which is conducive to extending tool life. In addition, the features of the finish plane are changed by helix angle. For example, when smooth finish machining is needed, sometimes we can use big helix angle of end milling cutter. However, when using the large helix angle of end milling cutter, the cutting resistance will be increased, and the right helix angle cutter will be forced to break out. Therefore, corresponding measures must be taken, such as holding the rigid high tool handle. Although the rigidity of the tool can be ensured, in the case of low rigidity thin plate machining and other workpieces, small helix angle of end milling cutter is sometimes used.

 

  1. 50 ° helix Angle of the spiral in profile processed by end milling cutter:

Multi – edge design, good rigidity of the tool, can minimize the amount of side cutting.

The tip of the blade is protected by the tip of the blade, which can prevent the tip from falling off.

 

  1. 60 ° helix Angle of end milling cutter is suitable for the high speed cutting hard cutting material such as SUS304:

For difficult cutting materials with low thermal conductivity and easy to increase the temperature of the tip during cutting, the unique shape of the blade can inhibit the influence of cutting heat on the tip.

 

  1. Finish milling cutter for high-speed machining:

USES 45 ° helix angle and unique groove shape, at the same time to realize high speed machining, improving wear resistance. The surface roughness is good after machining with fine tooth groove.

Use ALC coatings with good lubricity and heat resistance (heat-resistant temperature of 1100 ℃).

 

Our end mill grinder can intelligently handle the helix angle problem. If the end milling cutter is sharp, you can choose our end milling sharpening machine to repair.

Drill bit geometry has several characteristics

The diameter-to-length proportion of the drill bit is normally in between 1:1 as well as 1:10. A lot greater proportions are feasible (e.g., “aircraft-length” twist bits, pressured-oil gun drill bits, and so on), however the greater the proportion, the higher the technological obstacle of creating great.

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