project such as the Arrow, can owe
much of its successful completion to first rate team
work and individual enthusiasm of all people concerned
with it. These qualities were fully exploited by each
man in Quality Control and Inspection, regardless of
his position in the scheme of things.
Quality Control joined in right from the start of the
Arrow manufacturing program and there is very little of the preparatory work
that they were not concerned with. Back in October of 1954 a group under Norman
Turrall became responsible for checking all Arrow drawings before their release
to the Shops. His instructions read: "It will be the responsibility of Quality
Control to ensure that a part made to the limits of the production drawing or
loft will in no way depart from the requirements of the Engineering and Quality
Control Departments, the requirements of specifications in force, and the requirements
of the R.C.A.F."
By June of 1957, a total of some 38,000 drawn or
lofted parts had been checked and passed through the section, plus some 14,000
parts which had been reworked or redesigned. Competent checking of drawings resulted
in a smoother flow of work through the shops with an accompanying reduced number
of hold-ups and queries.
| One result of this group's work it that
a complete breakdown of inspection stages has been
available to men on the floor in time for each component,
installation, or marry-up sequence. A very important
phase of Quality Control operations concerns the Arrow's
interchangeability program. Tool designs are routinely
checked off for correctness of interchangeability features.
When a "first off" part is rejected in the
Machine Shop an investigation of the tooling is made
to off set the possibility of unnecessary repetition
of set ups and tool re-works.
With interchangeability designed into the Arrow
Quality Control has played ap important part in its successful application.
Maurice Cobb, Chairman of the Company Interchangeability
Committee, reported in October of 1954 that a start had been made on the Interchangeability
Report. That first report of a few pages is today a volume of more than two hundred
pages today. To Quality Tool Inspection and others this report is "the bible" since
it details fully the tool features to be inspected so that acceptable interchangeable
parts and components can be produced by the manufacturing division.
Besides compiling the Interchangeability Report,
Maurice Cobb is responsible for devising, setting-up
and guiding the Quality Control functions so far
mentioned. He also superintends Quality Tool Inspection.
Consider the significance of the Arrow wing sections
going together in the marry-up jig and later in the wing final assembly jig,
and again later when the fuselage components and the complete wing went together.
These marry-ups indicated a terrifically high degree of jig and jig-reference
accuracy. It speaks well of Quality Tool Inspection, that so few snags showed
up and that components went to-gether with the ease they did.
This group under John Trollope passed off the first
Arrow jig reference in February, 1955, and the first assembly jig 12 days later.
Since then some 235 tools have been passed and 331 jig references, and these
include the largest assembly jigs now in the plant. The main concern of Quality
Tool Inspection is interchangeability tooling. However, in June of last year
they took over the proving of sheet metal press form and stretch forming tools
and since then have cleared through some 10,000 tools.
Quality Tool Inspection also look after tools which
produce classified "complex" machined parts
and a variety of other tools which by arrangement
with the RCAF can be used as checking media to ensure
correctness of the part produced.
Using innovations on inspection, such as accepting
profile machined ribs and spars off the machine set-up, and machined castings
for canopies and windscreens off the production tooling, has playing a big part
in speeding production to the point it is today. At the same time it has meant
headaches for many.
Take, for instance, Gordon (Andy) Anderson in Receiving
Inspection, who has found his section loaded with many parts which were larger
than anything handled before. In many cases Andy's men have had problems in discovering
what to inspect the parts with. For example, no surface table of sufficient accuracy
was available, so it was necessary to have a 30-foot table re-surfaced to an
accuracy of plus and minus .0008 in. A custom made universal angle computor had
to be obtained because existing and available equipment was not large enough
for Avro's purpose.