Metals II, Spring 2016, Instructor: Dean Robinson

Machining (2016)

In our first assignment for Metals II, we were asked to turn 1" cold-rolled steel to dimension based on the orthographic below within the tolerances listed.

Below is my step pin made within .001" tolerance. The pin was turned on a metal lathe and stops were placed on the ways in order to create precise measurements. I used a four-jaw chuck and finished all edges with a file. All diameter measurements were made with a micrometer.

To introduce us to the Bridgeport, we were asked to mill a block of maple. Using the digital readout, I created this symmetrical block.

Our next assignment was to design an object that could be made within 5 hours out of round stock less than 2" in diameter and less than 4" tall. I created the below drawing, and it was manufactured by my classmate Jerry Ding.

Below is the object I was asked to manufacture. The drawing was generated by classmate Creama Wong. Many of the measurements were re-dimensioned due to the limitations of the machinery.

To create the piece, I initially turned the aluminum stock to dimension, then bore the hole in the top of the piece. I then used the radius cutter to create the rounded bottom. Next, I set up the Bridgeport to allow me to flycut the 3" diameter circle out of both sides. I was able to make symmetrical cuts by using a rotary head. Next, I used an endmill to create the 0.75" hole.