971's chassis

[AustinSchuh]

Originally Posted by DampRobot

By the way, good to see you come out of your CD hibernation Travis and Austin.

The students have been doing a great job answering all questions on CD, so there hasn't really been anything to add.

[craigboez]

Based on the pictures it looks like you're adding a countersink before putting in your rivets. This seems rather time consuming, so I'm guessing there is a good reason. Care to elaborate?

[James Kuszmaul]

Originally Posted by craigboez

Based on the pictures it looks like you're adding a countersink before putting in your rivets. This seems rather time consuming, so I'm guessing there is a good reason. Care to elaborate?

If we had to do the countersinks ourselves, yes it would be time consuming, but it is relatively easy for our sponsors to quickly do the countersinks (and to do them right for the rivets). This then reduces the number of protrusions that we have to avoid interfering with or that might catch on things.

[AustinSchuh]

Originally Posted by craigboez

Based on the pictures it looks like you're adding a countersink before putting in your rivets. This seems rather time consuming, so I'm guessing there is a good reason. Care to elaborate?

We use countersunk rivets. There are punches on the CNC turret punch which will make a .129 hole that is countersunk to 120 degrees, all in 1 hit. This makes it so the bottom, front, and sides of our bot are perfectly smooth and can't catch on anything.

[roystur44]

Originally Posted by AustinSchuh

We use countersunk rivets. There are punches on the CNC turret punch which will make a .129 hole that is countersunk to 120 degrees, all in 1 hit. This makes it so the bottom, front, and sides of our bot are perfectly smooth and can't catch on anything.

The tool actually makes two hits. A prepunch hole and the tool that forms the csk. Metal is malleable. Here is a link to show some cool things you can do on a punch press. Take a look at the stiffening rib tool and the Zip Tech.



http://www.wilsontool.com/ProductSub...ng_p_spcl.aspx