top | item 38798171

(no title)

OldManAndTheCpp | 2 years ago

> as well as chassis stamped by its die casting machines with a clamping force of 9,100 tons — beating that of Tesla's apparently.

This seems incoherent to me? Metal stamping is a process, and die casting is a separate process, from what I understand. Is there any reason to die cast a chassis? Does the press strength around the casting molds matter? I’d assume chassis parts would be built out of stamped and bent sheet metal?

discuss

order

apendleton|2 years ago

Tesla has switched their newer lines to casting. It seems like it's mostly about manufacturing efficiency rather than strength -- they can cast the whole underbody of the vehicle as a single piece rather than having dozens of stamped pieces that need to be welded or riveted together. Initially they were doing the front half as one piece and the back half as another, but they've needed to get bigger and bigger (higher- and higher-force) machines as they've gone from two-piece to single-piece construction.

londons_explore|2 years ago

When die casting, you inject semi-molten metal into a cold mould.

The mould must be held closed while metal is being injected. The "9100 tons" refers to the force keeping the mould closed. That force is approximately proportional to the surface area of the object being cast.