milling

It is true that in life you never end to learn. Till yesterday (more or less), I personally didn’t know what “milling” was. At least not its meaning in English. As I have told you before, it is not exactly my cup of tea here. But, whatever. I am expanding my vocabulary. 😉 

Being a teacher is also keeping updated and life long learning. And this is what I always do, with passion and great interest. Hope to be an example for my students too.

Here below you can find a link to a video about a milling machine.

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MY DEAR STUDENTS, READ AND THEN ANSWER THE QUESTIONS BELOW. Mrs. D. –> MILLINGmachines

DEFINITION of milling machines from this site http://www.thomasnet.com/articles/machinery-tools-supplies/how-milling-machines-work:

Milling machines are tools designed to machine metal, wood, and other solid materials. Often automated, milling machines can be positioned in either vertical or horizontal orientation to carve out materials based on a pre-existing design. These designs are often CAD directed, and many milling machines are CNC*-operated, although manually and traditionally-automated milling devices are also common. Milling machines are capable of dynamic movement, both of the tool and the workpiece, and many milling machines can perform multi-axis machining.

Because of variations in orientation, operation and application, milling machines have varying functions and different operating principles.

> Tooling

Milling machines can be outfitted with a number of tool heads to accomplish different machining needs. Some of these tool heads include cutters, rounding mills, fluted mills and ball end mills. Some milling machines have rotating tool ends that can change depending on the needed task—computer programming communicates with the machine when to change its tooling.

The different tooling used in milling machines is based on material and desired shape. Because materials like wood and steel have different physical properties, different tool bits are needed to properly machine the materials. If a milling machine uses a tool bit that is not strong enough to machine steel, the tooling and even the machine itself can be damaged. Tooling that is too strong for softer materials can damage the workpiece.

The basic tooling bit on a milling machine is called the cutter. A cutter is a shaped bar that has saw teeth. The cutter rotates rapidly to cut down and shape materials. The cutter is attached to an arbor, a shaped bar that varies in size, length and ending, and is used to hold the cutter firmly. […]

>Types of Milling Machines

Milling machines are categorized by their orientation to their workpiece and their degree of motion.

Knee-Type

Knee-Type milling machines employ a vertical workspace supported by a knee, which is an adjustable vertical casting. […]

Plain Vertical and Horizontal

Milling machines with a standard work surface can either be oriented vertically or horizontally. […]

Universal Horizontal Milling Machine

A universal horizontal milling machine differs from the plain horizontal type because it has a table swivel housing, which allows the table to move out 45 degrees from the standard horizontal position. This workpiece movement allows for easier angular or helical milling operations.

Ram-Type and Universal Ram-Type Milling Machines

A ram-type machine is used to allow the tooling to position itself on a greater range of space with regards to the workpiece. […]

Swivel Cutter Head Ram-Type Milling Machine

With a swivel cutter, a milling machine can rotate from a completely vertical to a completely horizontal position. The worktable also moves, providing the user with a very liberal degree of motion and orientation. […]

*CNC means Computer Numerical Control. This means a computer converts the design produced by Computer Aided Design software (CAD), into numbers. The numbers can be considered to be the coordinates of a graph and they control the movement of the cutter

** su cosa si basa

QUESTIONS:

  1. WHAT ARE MILLING MACHINES?

  2. HOW ARE DESIGNS USUALLY DIRECTED?
  3. WHAT ARE MILLING MACHINES CAPABLE OF?
  4. WHY DO MILLING MACHINES HAVE VARYING FUNCTIONS?
  5. LIST SOME TOOL HEADS.
  6. WHAT IS The different tooling used in milling machines BASED ON**?
  7. WHAT IS THE BASIC TOOLING BIT?
  8. WHERE IS THE CUTTER ATTACHED TO?
  9. LIST ALL TYPES OF MILLING MACHINES.
  10. HAVE YOU EVER SEEN A MILLING MACHINE IN THE FLESH (dal vivo)?