Posts Tagged ‘mill’

SME: Basic Manufacturing Processes

SME (the Society of Manufacturing Engineers) has a great playlist of Youtube videos that outlines many basic manufacturing processes, and they are all right here for you. Most of the videos are from two to five minutes in length, and get the main points of those processes across to students in an easy to understand format. There are 44 videos in all. Thanks SME!

The best way to search for or find  a particular video is to use Ctrl + F in the browser window and then type in the process you are looking for. It will then jump to the video you are searching for!

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How many teeth or flutes for my CNC tools?

QUESTION:feedrate

Does it matter how many teeth or flutes my end mills have?

ANSWER:

Actually it does. A good rule of thumb for the beginner: the harder the material, the more teeth!  What’s the difference between teeth and flutes? Teeth do the cutting, flutes bring the cut material away from the part. The excerpt from our Tooling ppt is below! If you look at the formula for Feed rate here, you will also see that the number of teeth your tool has determines how fast you can move the tool across the material. By looking at this equation for calculating

reddownloadCNJ CNC TOOLING BASICS

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The Basics: Tooling For CNC Machines

  • 1CCendmill
  • 2nonccendmill
  • 3Ballendmill
  • 6engravers
  • 10climbvsconventional
  • 10climbvsconventional
  • 5depthofcut
  • 4Stepover
There is so much to learn about tooling when it comes to CNC machines, that it can really be overwhelming. Here we present just the basics as it pertains to a “rookies” classroom. There are complete courses on these topics, but this should get you started! First of all, We have put together a short powerpoint which can be downloaded at the link below.

reddownloadCnJ CNC Tooling Basics

 

Topics:

Types of cutters: Center Cutting End mills

1CCendmill          

Types of cutters: Non-Center Cutting End Mills

2nonccendmill  

Types of Cutters: Roughing Mills

13roughingend

Types of Cutters: Ball End Mills

3Ballendmill

Types of cutters: Engravers

6engravers

Types of cutters: Fly or Shell Mill

12flyshell Does Number of Teeth Matter? What are Flutes? 7numderteeth

What is Depth of Cut? How Deep can I Cut on a Single Pass?

5depthofcut

What is Stepover? How Much Should I make the Toolpaths Overlap?

4Stepover

What is Chip Load?

8chipload

What are Tools Made of?

9toolmatls

What’s the Difference Between Climb and Conventional Cutting?

climb4 climbconvention2

What Tool Should be Used for Which Operations?

11whattool

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What’s the Difference Between Climb and Conventional Cutting?

QUESTION:

What is the difference between Climb & Conventional cutting?

ANSWER:

Milling tools can advance through the material so that the cutting flutes engage the material at maximum thickness and then decreases to zero. This is called Climb Milling. Cutting in the opposite direction causes the tool to scoop up the material, starting at zero thickness and increasing to maximum. This is called Conventional Milling. The fewer the teeth, the more space between them. This is called chip space. http://www.hsmworks.com/docs/cncbook/en/#Ch03_CuttingToolFundamentals

reddownloadCNJ CNC TOOLING BASICS

climbconvention2

 

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Jim Hanson

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