2006-08-27

Vehicle Prototyping system, a type of jobshop

It would be interesting to see this automobile prototyping system.

An automotive engineering firm celebrated its acquisition by an Indian automaker and its subsequent expansion in a reception October 24. Farmington Hills-based Design Intent Engineering Inc. was founded in 1999 by its CEO, Matthew R. Pyzik, and three partners. The four had worked together for a large auto supplier as a "fire department" fixing troubled parts projects. Last June, Design Intent was acquired by Eicher Motors Ltd., an Indian builder of trucks, buses and motorcycles. Since then, Eicher has invested almost $1 million in Design Intent, including an advanced prototypingsystem. Employment has also risen by seven positions and now totals 70.
Pyzik said the acquisition gives Design Intent greater resources and a worldwide reach, and that the company will now offer more services with "emerging sectors," such as advanced materials and alternative energy power plants. Pyzik said the company's projecting 40 percent employment growth over the next 18 months. More about Eicher at www.eicherworld.com. More about Design Intent at www.designintenteng.com.

Re: [metalshapers] Handheld Scanner for vehicle body reverse engineering


[Calvin Banman] The arm we are using runs with Delcam's Powerinspect
software. (http://www.delcam.com/) It has an option for "point
clouds" that you can export as an IGES file. Apparently this would
make reverse engineering easy, but our company was too cheap to spring
for that. I worked with one of our engineers and found a way around
it. We can still export our information in an IGES file, but for it
to be useable for solid modeling; we have to measure a number of
points in a straight line around the part. Then using as many of these
lines as required to give us the detail level engineering needs, they
can import the file into their CAD software, and create a solid model.
Obviously the more data the better the end result. I use magnetic
strips to give me a straight line that I follow with the probe, but I
tried one freehand just to see if it worked and it did. I just drew
some lines on the part and followed it as well as I could. I do the
point lines in a crosshatch or checkerboard pattern. The beauty of
the portable CMM arm is that you can measure parts of infinite size.
Some of our frames are over 20 feet long, and to measure them, we end
up doing about 8-10 leapfrogs (position changes on the arm).

[Jim Peck]I am really interested in the techniques you use to develop
the CAD models.

[Calvin Banman] http://us.romer.com/
I use one of these at work. We don't have the laser scanning
attachment. The reverse engineering option is extra cost and our
company didn't want to spring For it, but I have found a work-around
that lets me give engineering the data they need to do a CAD Solid
model from measurements I take. I know the Honda plant in Allison,
Ontario uses one of the Romer arms to measure body panel fit on the
cars they build. When I was getting my training on the older version
of the arm, I brought in a 360 cylinder head and digitized the
combustion chamber shape.

[James Peck] The May/June 2006 issue of Time-Compression Technologies,
www.timecompress.com, discusses the use of a handheld self-positioned
Laser scanner to scan a vehicle body to produce a 3D CAD model of the
vehicle body. The vehicle scanned was the T-Rex Manufactured in Quebec
For the purpose of doing FEA and using CMM's.

2006-08-26

Emailing: examp16.htm




LASER SCANNING REVERSE ENGINEERING ON-SITE SERVICES
CLASS-A SURFACING SOLID MODELING


Example 16: Hydroformed Frame Rails

Click on an image to enlarge

Problem: To inspect hydro-formed tubes and compare them to the nominal design intent (CAD geometry). The customer requested that a best-fit alignment be used to associate the measured data to the nominal CAD geometry.

Process: The hydro-formed tubes were measured using a ‘line’ laser scanning machine. This allowed for full part surface definition totaling close to 2,000,000 data points on each part initially. The tubes were digitized from a number of different orientations which were all later associated together into the same coordinate system.

Solution: Each scanned hydro-formed tube was thoroughly scanned, and overlaid with the nominal CAD data. A comparison between the measured data and the nominal design intent (CAD) was performed, resulting in ‘color map deviation charts’. These charts are delivered in .JPG, and .BMP formats which can be viewed or printed on any typical PC computer system.

2006-08-20

Aluminum vehicle stampings

The August 2006 issue of MetalForming has an article on transfer
presses Anchor Manufacturing acquired to supply stampings to an
automotive OEM. A number of the stampings are aluminum. The article is
in PDF and can be downloaded. I felt the article was significant due
to the emphasis on aluminum.

http://www.metalformingmagazine.com/current/index. asp

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Jim Peck 248-765-4273
jamesgpeck@sbcglobal.net
http://autobodymfg.blogspot.com
http://forums.sme.org/showthread.php?t=208
Avocational interests:
Reproduction Vehicle Body Manufacturing
Vehicle Body Design and Reverse Engineering
Job Skill Testing
Computer Based Learning
Expert Systems
Testing Based Certifications and Licensing