# Why have a feed force in the cutting process?

• exln
In summary, a zero rake angle results in a low feed force, while a rake angle greater than zero results in a higher feed force.
exln
You knew there is a cutting force in the orthogonal process, it is exerted by cutting speed, buy why have a feed force?

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The profile of the cutter has an effect on the force needed to feed the cutter into the cut.
A tool steel saw with positive rake may hook or pull the cutter into the material.
A carbide cutter with negative rake may be forced back from the material.
The increased use of negative rake requires stronger, more rigid machine tools with more powerful feed.
https://en.wikipedia.org/wiki/Rake_angle

What material are you machining?
What tool material and profile are you using?

Baluncore said:
The profile of the cutter has an effect on the force needed to feed the cutter into the cut.
A tool steel saw with positive rake may hook or pull the cutter into the material.
A carbide cutter with negative rake may be forced back from the material.
The increased use of negative rake requires stronger, more rigid machine tools with more powerful feed.
https://en.wikipedia.org/wiki/Rake_angle

What material are you machining?
What tool material and profile are you using?
thank you, but you knew whatever the type of tool, there is no motion in the direction of feed force. If the rake angle equal to zero, is there a feed force?

There are too many different possible interpretations of the cutting geometry. The relative motion of the work and the tool in 3D have not been specified.

You need to restrict the discussion to a simple situation, such as a parting-off tool in a lathe. A zero rake angle would then have a low feed force while the edge was perfect. The moment the cutting edge became slightly dull or rounded, it would present a higher feed force, but it would continue to cut.

## 1. Why is a feed force necessary in the cutting process?

A feed force is necessary in the cutting process because it provides the necessary energy to move the cutting tool through the material being cut. Without a feed force, the cutting tool would not be able to penetrate and remove material effectively.

## 2. How does the feed force affect the quality of the cut?

The feed force directly affects the quality of the cut by controlling the speed at which the cutting tool moves through the material. Too much feed force can result in a rough and uneven cut, while too little feed force can cause the cutting tool to get stuck or break.

## 3. What factors influence the amount of feed force needed in the cutting process?

The amount of feed force needed in the cutting process is influenced by several factors, including the type and hardness of the material being cut, the type of cutting tool being used, and the desired speed and depth of the cut.

## 4. Is there a specific feed force that is optimal for all cutting processes?

No, there is no one-size-fits-all approach when it comes to feed force in the cutting process. The optimal feed force will vary depending on the specific materials and tools being used, as well as the desired outcome of the cut.

## 5. Can the feed force be adjusted during the cutting process?

Yes, the feed force can be adjusted during the cutting process to achieve the desired outcome. This can be done manually by the operator or through automated systems that monitor and adjust the feed force based on real-time data.

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