A face milling operation is used to machine 6.0 mm from the top surface of a rectangular piece of aluminum 300 mm long by 125 mm wide in a single pass. The cutter follows a path that is centered over the workpiece. It has four teeth and is 150 mm in diameter. Cutting speed

Complete Question

The complete question is shown on the first uploaded image

a

The  machining time is

b

The maximum metal removal rate is

Explanation:

From the question we are told that

            The length of the work piece is  

            The width of the work piece is

           The cut Depth is  

             The chip load is  

             The number of teeth is  

              The cutting speed is

Now in  order to obtain the actual machining time to make the pass across the surface

We first obtain the speed of rotation of the machine

The cutting velocity is  mathematically represented as

 Where d is the diameter given as 150mm

              N is the speed of rotation

Making N the subject of the formula

Next we need to obtain the feed rate this is mathematically represented as

Substituting the values accordingly  

The displacement  of the milling operation  is mathematically represented as

The  machining time is mathematically represented as  

The maximum metal removal rate is mathematically represented as

Substituting values accordingly

your answer is, orbit around the nucleus