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CUSTOMER STORY |
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What Does it Take to Keep Manufacturing in the U.S.? |
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by
Joe Romanowski Common manufacturing logic would dictate that a stable product design containing 50 different components with a volume of 30,000 per year would be a tempting off shore outsource. Why not try to capture the advantage of low off shore labor costs? Well, Cardwell Westinghouse an over 100 year old company in Chicago, IL, www.wabtec.com, has done an exceptional job of developing some extensively engineered cells to strip labor content out of the manufacturing process, and in my opinion, make it difficult to outsource the product. When I walked into the Cardwell
Westinghouse handbrake cell my first impressions
were "nice, busy, but something is different
here.”
I witnessed a group of highly trained people
interacting with many machines,
operations and material handling equipment, producing
a part designed 100 years ago that looked,
quite frankly, old fashioned. We’ve all seen handbrakes on every
boxcar we’ve ever watched as a train passed. It's
that big chain hanging at the bottom that
gives it that old fashioned look. I
wondered why they still make this product in the U.S. However, as I stood in the cell
and began to immerse myself in its numerous
manufacturing steps, I found myself
captivated by the complexity and
detail designed into the cell. At that point, I was inspired!
Seven men operate nine Mazak CNC machines, several stamping presses, along
with punch and press (at least four bearings) operations, labeling, three
welding stations, sub-assembly stations, a really unique
threading station, riveting, all putting these 50 parts
together into one final assembly every 2 or 3 minutes. They also test, wash and paint
in the cell. This cell is set up in a deep
horseshoe design and linked by an overhead
conveying system. The cell process
is well documented. There are laminated
process sheets located throughout the cell
including photographs and explanations. Each person is
expected to execute each process exactly as
it is documented. The productivity of the cell is astounding.
There is substantial historical expertise and knowledge
resident in this cell. It would be very very difficult for a low
labor cost country to compete with this process.
Next, we moved on to the slack adjustor cell, a cell
that I was familiar with before I entered the plant. We had been
working with David Barajas (video
link), Technology Engineer, a 33 year veteran with Cardwell to
improve the process of an already astoundingly productive cell.
The original cell had 11 CNC machines, operating
two 10 hour shifts per day
with 6 operators, five days a week. The new
improved process includes adding 4 new CNC machines and reducing the cell
total machines to
just 7. With this
streamlining,
throughput has increased
48%! Eventually,
they
expect to go to 5 operators
per shift. What makes this story worthy to
be told is that Cardwell sells about
30,000 of
these slack adjusters per year.
Once again, it could
be
tempting to outsource this assembly.
Dave Meyer, Vice President/General Manager stated, "We are committed to competing with the
world on cost, quality, delivery, and overall performance. We believe
that this investment is an important step in our continuing journey to do
just that." David Barajas
described their operation as, “a JIT
(Just-in-Time) made to order environment.
We turn our
slack adjuster inventory at least 14 times a year
and our goal is to increase our turns to 18.” David is responsible for programming, tooling, set-up,
training and process improvement for Cardwell Westinghouse. He went on
to explain, “throughput is very important to us. We look at
everything.
As an example, a big benefit
for us as we improved the
throughput of the slack adjuster cell is a big
gain in floor space. Our slack adjuster uses
15 machined parts to complete an assembly.
Raw material enters at one end of the cell and comes out as a complete
assembly, painted and ready to ship.
We have very
little inventory. A primary reason we
are at only 14 turns is because there has been a
shortage on some of the metal commodities and we had to
advance order to protect ourselves.”
So how did Machinery Systems
help to improve this cell? We worked with David and his people to
design a special
rotary fixture to machine
the front and rear jaws on a Mazak Nexus 510C/50
vertical machining center. We also worked together to
integrate a Toellner automatic load/unload system
on a Mazak Dual Turn 20 to machine the joining
cone nut housing.
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