If you manufacture automobile or truck
steering knuckles at your plant, you need the newest patent pending fixturing
system from PROHOLDŽ to increase your overall productivity. PROHOLD's
unique design reduced the number of machine tools needed to meet production requirements
from seven two-pallet horizontal machining centers down to three two-pallet machines.
PROHOLD's customer saved approximately $2 million in capital expenditures on
machines and tooling by reducing the number of fixtures necessary to get the job done.
PROHOLDŽ fixturing increased overall productivity of the manufacturing process and
decreased the capital investment required to obtain these gains, providing a fixture
designed to eliminate chip build-up, while simultaneously making the loading and unloading
of parts much easier for the operator to manage.
This fixture utilizes a unique patent
pending hydraulic expanding pullback module for clamping and securing steering knuckles,
however, any kind of part designed with a through-hole in it could possibly be held with
these modules. These hydraulic expanding pullback modules can be incorporated into
any fixture to eliminate chip-catching standard modular tooling components. Using
PROHOLDŽ pullback modules instead of modular tooling components provides more room on the
fixture for more parts within the working envelope of the machine tool.
The fixture below was designed to
accommodate four steering knuckles - two knuckles orientated on the side of the fixture
for one geometric plane of machining operations, and two knuckles on the top of the
fixture for the second geometric plane of machining. For every complete machining
cycle of one pallet on the Makino A55 machine tool, two finished parts are produced off
Take note of the fixture shape that was
designed to eliminate chip buildup. The slanted profile of the fixture block allows
chips to drop off the fixture. This is another big advantage inherent, as much as
practically possible, in all PROHOLDŽ fixturing systems. PROHOLDŽ designs use only
internally drilled hydraulic porting. Those tubes you see in the hydraulic rotary
coupling housing in right-hand picture immediately below are used to connect the machine
hydraulic system to the PROHOLDŽ fixture. You won't find a tube or tubing
connection, internal or external, on any PROHOLDŽ fixture.
PROHOLDŽ designs its products to
eliminate as many chip-catching components as possible, thereby further enhancing the
ergonomic friendliness of its workholding systems. PROHOLDŽ also designs its
fixturing systems to operate on lower hydraulic pressures, yet still provide high clamping
forces. This prolongs the service life of the hydraulic components and seals.
A new line of patent pending hydraulic clamps, soon to be incorporated into
systems, provides approximately double or triple the clamping force over that of standard
modular swing clamps using the same identical pressure, without the use of intensifiers,