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SEAVER PHILIPP
CONSTRUCTION
This device was designed and built using construction methods taught at central Washington University, the device will also be built using the resources at CWU. The initial design considerations can be seen in appendix B1-3. The initial design also used a spring in order to give initial engagement of the cam of the rope; the final design uses the back plate geometry in order to cause the ropes path to always interact with the cam eliminating the need for a spring and its complex mounting. The device was assembled using 2 hammer riveted pins in order to hold all device parts together.
The manufacture of the device will take part at Central Washington University with nearly all activities taking place in the machine shop. This will be restricted to the capabilities of the central machining lab and so if the manufacture of the Back-plate is too complex for the tools available it will have to be built at another location.
The primary issue during construction at central is the precision of the CNC mills, which will be used in the machining of the back-plate and the cam. The cam must be mathematically precise in order for the operation of the device to be successful and the back-plate requires a shaft to be either milled or turned into part of it in order to reduce the total number of parts.
After manufacturing the device the issues encountered included eliminating several fillets on the back plate in order to reduce the complexity of manufacture, increasing the thickness of the back plate backing material in order to grip in in a vice from the bottom in order to machine the mart more easily.
The assembly is built off of the back plate with the installation of the cam being the first step, once slotted into its pin, the cam retaining pin is put in place, then the device is flipped over and the cam retaining pin is riveted in place. The next step is placing the faceplate over the back plate and installing the faceplate retaining pin, once in place the faceplate retaining pin is also riveted to hold the device together.
Construction: Education
Construction: Welcome
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