Chicagoans are very particular about their hot
dogs. To begin with, it has to be an all-beef product, served on
a steamed poppy seed bun. But just as important are the essential
toppings. If you walk into a proper Chicago hot dog stand
and order it "Chicago Style," you'll get exactly these seven ingredients
on your dog: yellow mustard, chopped white onions,
neon green pickle relish, a dill pickle spear, tomato wedges,
sport peppers and, of course, celery salt.
Chamfering and deburring of
cylindrical gears does not get
much love from manufacturers.
The process is seen as a necessary evil
since it is adding cost without adding
value. However, there are good reasons
for not underrating this important auxiliary
process. Chamfering and deburring
takes care of several issues which
may come up during the manufacture of
Peter Eelman has been involved with the International Manufacturing
Technology Show for more than 30 years. First as an exhibitor with Warner & Swasey
Co.; later with Toyoda USA; later still as a consultant; and currently as vice president
for exhibitions and business development, IMTS. He also serves on the board
of directors of the exhibitor-appointed Contractor Association and is a former member
of the board of directors for the Trade Show Exhibitors Association. Eelman is a
speaker with the International Association of Exhibitions and Events and serves on
the Metropolitan Chicago Pier & Exposition Authority Labor Council. As the head of
IMTS, Eelman is the go-to, make-things-happen guy for the Chicago Convention and
Tourism Bureau, the Metropolitan Pier and Exposition Authority, McCormick Place
and the various vendors, service providers and trade unions involved in the complex
trade show process. In addition to IMTS, Eelman is also prominently involved in
shows with an international presence.
This paper addresses the lubrication of helical gears - especially
those factors influencing lubricant film thickness and pressure.
Contact between gear teeth is protected by the elastohydrodynamic
lubrication (EHL) mechanism that occurs between nonconforming
contact when pressure is high enough to cause large
increases in lubricant viscosity due to the pressure-viscosity
effect, and changes of component shape due to elastic deflection.
Acting together, these effects lead to oil films that are stiff
enough to separate the contacting surfaces and thus prevent
significant metal-to-metal contact occurring in a well-designed
The increasing demands in the automotive
industry for weight reduction, fuel
efficiency and a reduced carbon footprint need to be addressed urgently. Up until now, widely used conventional steels have lived up to expectations. However, with more stringent emissions standards,
demands on materials are increasing.
Materials are expected to perform better, resulting in a need for increased fatigue strength. A possibility to increase torque
on current generations without design
changes can be achieved by selecting suitable materials.
Having read about an automobile race in France, Kohlsaat
decided he'd host America's first auto race in Chicago. The year
was 1895 and automobiles were still a great curiosity. Kohlsaat,
owner/publisher of the Chicago Times Herald, planned to exploit
the growing interest in motoring by sponsoring a 54-mile race
from downtown Chicago to nearby suburb Evanston, Illinois,
and back. The match was open to all comers, foreign or domestic,
whether powered by gas, electricity, or steam. The top prize:
$2,000 (that's 50,000 2016 dollars).
In terms of the tooth thickness, should we use the formulation with
respect to normal or transverse coordinate system? When normalizing
this thickness in order to normalize the backlash (backlash parameter),
we should divide by the circular pitch. Thus, when normalizing, should
this circular pitch be defined in the normal or traverse coordinate
system, depending on which formulation has been used? Is the backlash
parameter always defined with respect to the tangential plane or
normal plane for helical gears?