squall_line said:
Japan is repatriating a 700-ton press (pressing ability, not weight of the machine itself) from Brazil as it closes its first-ever plant in that country (others will remain open).
https://jalopnik.com/toyota-is-moving-a-700-ton-prewar-press-machine-halfway-1851173118
It's a fascinating bit of interest in how quality is as much about the company itself as it is about the geophysical location where something is produced.
See also: the NUMMI plant where the Pontiac Vibe was made alongside the Toyota Matrix back in the 90's
https://medium.com/10x-curiosity/worst-to-best-lessons-from-nummi-4cde7eb41f21
Farberware, the pots and pans company, was a customer of mine in the Bronx, NY before they went out of business.
To laminate the the aluminum heat dispersing plate to the bottom of the pots, they pre-heated the the aluminum plate and then placed it on the bottom of the pot and struck the plate with the ram of a 1,000 ton screw press. It was an extravagantly dangerous process, destined to kill someone if they had remained in business.
In order to fit the screw press in the building, they had to cut a hole in the ceiling of the factory and steal an extra 10 feet of height from the offices above.
Unlike a conventional press which uses a flywheel attached to the horizontally placed crank shaft, the screw press has a flywheel attached to a vertically placed lead screw. The lead screw is constantly spinning. When the operator touches the palm buttons, two halves of an engaging “nut” are pressed inward to engage the screw thread. The spinning screw thread drives the ram downward until it reaches the bottom and then it disengages.
One of the advantages of a screw press is that it is able to generate tonnage over the entire range of travel. A crankshaft press only generates the maximum tonnage at or near the bottom dead center.
They called my company in because they had cracked the frame (which was repaired) and my company sold equipment that measures the generated tonnage.
It is a widely misunderstood fact that the 500 tons of the 500 ton press, is not a measure of how much tonnage it can generate. It is a measure of how much tonnage the components can withstand before destroying itself. There is not a punch press in the world that I could not destroy by simply playing with the setup of the punch tools. They are all able to generate more tonnage than the components can handle.
I don’t know how well it finally worked out. I was ordered by the management of the company I worked for to no longer sell to Farberware because their manufacturing processes were too dangerous. We sold safety equipment and the concern was that we would get dragged into a lawsuit.
Relocating a massive punch press requires a lot of planning. Is the building to receive it tall enough to accept the machine? Are the footings in the factory floor deep enough to support it? Is there a door large enough to take it in? Is there moving equipment capable of transporting it from the ship to the factory?
So no simple matter.