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ABE 33000 Essay #14 -1- ABE 33000 –
Learning Module Eight Essay Fourteen Background: The backhoe attachment on the Bumblebutt Cembip (remember that lovely machine originally created for the military somewhere in the Arctic Ocean across the channel from the Island of Misfit Toys) has a quick attach head that allows the bucket to be swapped with other implements. Bumblebutt manufactures a concrete hammerdrill attachment for the Cembip. The bolts holding the hammerdrill to the attachment frame are shearing in the field after 20 to 30 hours of operation. Figure 1 shows the assembly drawing for the connection between the hammerdrill (the center section) and the attachment frame (the outside sections)
. You’ve checked the bolt sizing, preload specification, bolt material quality, and assembly torque. Everything seems to be as specified. The same attachment frame system is used on other Bumblebutt Cembip implements without any problems. Assignment: Draft a business memo outlining your suspicions and changes to the joint design to potentially solve the problem. What does this joint assembly design need? (the unit must be able to be disassembled, so converting to a welded joint is not an option). Requirements: typed, 12 pt Times New Roman font, 1.15 line spacing, title, complete sentences, submitted via BrightSpace. On-Track Submission: Beginning of Lecture #24
ABE 33000 Essay #14 -2- Figure 1 –
Assembly Drawing for Typical Bolted Joint in Hammerdrill / Quick Attach Frame.
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M
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