Page 1 - Combined_105_OCR

INTER COMPANY CORRESPONDENCE

DATE
13, 1968
TO - NAME DEPT. DIVISION PLANT/OFFICE
H. Bader,, Jr. S&M Engineering Space Huntsville
FROM - NAME DEPT. DIVISION PLANT/OFFICE
W. P. Wright/J. E. Vaughn S&M Engineering Space Huntsville

SUBJECT:
Trip Report to Detroit, Michigan on February 12, 1968

Monday morning a meeting was held with Mr. Bennett and Mr.
Mosher at the Dodge Assembly Plant to review a problem involving
the checking or verification of proper torques in critical automotive
fasteners during automobile assembly. The meeting was of an explor­
atory nature to define the problem and discuss preferred technical
approaches and guidelines. Mr. Bennett stated they were expecting
the automotive safety group to release a list of critical fasteners which
required positive verification of proper torque or 100% inspection.
Current techniques involve spot check using hand torque wrenches
after car assembly. The preferred approach by manufacturing is to
provide a system integrated into the assembly operation to give the
operator of automatic torque wrenches a positive go - no go - indi­
cation of proper torques. Due to the large number of different types
of wrenches and fasteners, it is desirable to have a device basically
interchangeable on all wrench applications. However, Quality Control
may specify a separate operational check thereby requiring a com­
pletely separate system.

Later in the morning meetings were held at Central Engineering
with Chassis Engineering personnel to define the problem in more
detail and attempt to obtain a listing of critical torque items and limits,
etc. Mr. Dick Grasey and Mr. Dave Vail were contacted. Mr. Grasey
said that there is no official listing at this time of critical torque items,
but that it would be basically the suspension, steering, wheel and brake
components. Mr. Vail, a specialist in fasteners, defined the problem
as a requirement to verify fastener tension, not torque, and to provide
a more narrow control limit than now exist. Mr. Vail suggested that
if we were interested in pursuing this further, we should talk with Mr.
J. T. Allan in Tool Engineering and obtain a set of Process Standard
PS-809 from the Chrysler Standards Group.

It would appear from the discussions held that a device is needed
which can ideally be fastened to the assembly line torque wrenches and
verify fastener tension or at least torque within a range of + 10%.

84- 110-7879 REV. 1-63