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Why roughing is used in processing?

2023-10-27

Roughing in machining is the removal of large amounts of material from the workpiece in preparation for semi-finishing and finishing operations. It involves using large feed speeds and cutting depths to remove excess material as quickly and efficiently as possible, often leaving some rough surface finish.

The goal of roughing is to remove as much material as possible to bring the workpiece close to its final shape while minimizing the time and effort required to do so. It is usually the first stage of the CNC machining process, allowing for more precise and efficient finishing operations later in the machining process.
CNC milling

The benefits of roughing
Roughing in machining reduces production time and costs, extends tool life, and easily detects blank defects, making it an integral part of the manufacturing process.

Time saving: Roughing is the rapid removal of large amounts of material, thus reducing the time required for processing. This means that the machining process can be completed faster and parts can be produced at a faster rate.

Cost savings: It can help save money by completing the roughing process in a single setup, eliminating the need for additional setup on the finishing machine.

Material saving: Roughing reduces the volume of material that needs to be extracted in the finishing grade by up to 50%. This saves a lot of material and reduces overall cost and shipping weight.

Extended tool life: By removing large amounts of material at the roughing stage, cutting tool wear is minimized. This results in less frequent tool replacement and reduced tool-related expenses.

Easy identification of blank defects: If the machine operator sends the roughed workpiece to the finishing process, any defects present in the product, such as pores or sand holes, will be quickly seen and recognized by the operator. Once the material is removed from a particular part of the component, defects or cracks become more apparent.

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