Thursday, October 26, 2006

Manufacturing the Mini - Euro Auto - automobile design information - Brief Article

That the Mini is an icon is beyond dispute. The original was a car of its time: compact, basic and cheeky. Everyone loved it from the young to the old, from the impecunious to the fabulously wealthy. It was the people's car, more so than even the Beetle. And yet, tempus fugit, its time had really run out, perhaps even 20 years ago, but it was still manufactured because people kept buying it. Ending production was more like putting a good and faithful dog to sleep, the emotional pull too much.

Then BMW came on the scene and bought Rover, Mini's owner, in 1993. It turned out to be a disastrous move for the German automaker, but if this cloud had any silver lining, it was the Mini. At first, it was left to the British design team to come up with some ideas, but those presented in Geneva--Spritual 1 and 2--were wide of the mark of what a Mini was all about. Then the Germans got heavy. While lip service was paid to British sensibilities, responsibility for the new Mini was transferred to Munich, and the result is... sensational.

Now that is very good news for the folk at Cowley, the original Morris works--since 1914--on the outskirts of Oxford in England. This was a plant whose very future was in jeopardy a few years ago. BMW, though, saw its potential and invested hundreds of millions of dollars in it in a thorough rejuvenation program. However, that was for the Rover 75, a car that was launched toward the end of BMW's ownership of Rover. Once it was announced that the British automaker had been sold for [pounds sterling]10 last year, Cowley's future suddenly looked bleak again, and yet it turned out that it was not part of the deal--it still belonged to BMW and it was going to make the new MINI.

Before it could turn its hand to that, though, there was the small matter of transferring all of the Rover 75's presses to the Rover-owned plant in Longbridge, about 100 miles away, and installing the new presses in their place. However, this was done without fuss and fury over a four-week period last summer--but it had to be as the decision to switch production from one plant to another was made just nine months before pre-production was due to start and 12 months before series production.

"We did it on time and within 10 weeks we were into volume production," says Paul Chantry, Body-in-White director at Cowley. "Normally we reckon to take six months for this."

Once the transfer had been made, BMW then spent around $400 million further upgrading the plant and introducing innovative systems such as KISS (Kernfertigungs - integierendes Steuerungs System). KISS is a BMW Group information technology system that totally automates communications throughout the production process and provides an electronic history for each and every car produced. From body-in-white to the end of the assembly line, KISS schedules and sequences production.

Another innovation at Cowley and a first in Europe was the introduction of electric and battery tools in place of compressed air tools on the assembly line. These are also linked into the KISS system so that their performance can be monitored through a controller station. Not only do these tools give far greater accuracy and finer tolerances, but the working environment is altogether more pleasant as the noise level is dramatically reduced.

These are just two tools in BMW's quest in the "zero-fault" quality program it is instilling in the workforce. "If you plan for zero defects," says Assembly director Rainer Bickmann, "there is a good chance you will get zero defects. If you don't aim for zero, then you're pretty certain to get some."

Around $280 million was spent in the body-in-white facility on renewing and expanding it to 40,000 [m.sup.2] for the increased levels of volume and automation. The body-build process is highly automated with 229 KUKA robots accounting for 80% of all robotics with the remaining 20% being sourced from in-house tool-makers within the BMW Group. The spot welding is 100% automated. Laser inspection is carried out by Perceptron cameras at key points of the build process to check the build integrity during manufacture on-line and also quality sampling off-line. The body shell itself is said by BMW to be class leading in its stiffness, which at 24,500 Nm/degree is some two to three times stiffer than any of its rivals.

As customers can order their car with a contrasting roof color in white or black, the paint shop, which was built in 1997, features Mini-Mix and Micro-Mix paint systems for fast color changes between individual body shells. An eight-stage process, it eliminates the need to "batch" paint a number of cars in the same color before switching colors. The total time taken to protect and paint the body shell is 10 hours.

Now there are those who will say that the new MINI (BMW, in its logic, spells this little car in capital letters) has missed the original concept by miles. It may look Mini-ish, but it is far too large and bloated ever to wear the Mini name and that Alec Issigonis, the original's creator in 1959, would be turning in his grave. That is a moot point, as reactions of more people indicate it is going to be a huge success

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