Poling Group News   |   Volume 1   |   Issue 1
PGM - Profile Grinding Machine
Since 1975, when the U.S. mandated Corporate Average Fuel Economy (CAFE) standards, automakers have been under constant pressure to increase the fuel efficiency of their vehicles.

As they looked for cost-effective ways to meet fuel economy standards, automakers naturally turned to their tire suppliers. And the tire industry responded, developing OE tires that were lighter, with new constructions that used more sophisticated tread compounds.

Today, the need to create fuel efficient tires is shared by replacement tire manufacturers who feel the marketplace pressure exerted by consumers faced with the higher cost of fuel, and the societal desire to reduce global warming,

But the costs incurred to meet the goal of increased tire fuel efficiency have been high. Major players in the “environmentally green” tire market routinely report R&D budget commitments in the millions of dollars, and development times exceeding a decade.

The Poling Group has developed an alternative for tire makers who want to begin immediate delivery of more fuel-efficient tires, and do so in a cost-effective way. Our revolutionary alternative is based on a simple premise: a round tire may increase fuel efficiency.

The patented Profile Grinding Machine (PGM) recently introduced by Poling Group company Akron Special Machinery uses dual precision grinder units to consistently produce round tires Round tires have reduced fore and aft forces and deliver a ride that is quiet and vibration-free.

        
 
Consider the results of this recent trial. Before profile grinding, the radial runout of a locally purchased, 15” replacement tire was 0.0367” and radial peak to peak force was 22.4 lbs.
 
After a profile scan and grind of 0.028”, the new test waveform shows 0.0035” radial runout and a drop to 17.6 lbs of radial peak to peak forces.
 
Conicity also was corrected from -5.2 lbs. to +0.3 lbs.
 
In this trial, the grinders ran at 10,000 rpm with a feed rate of 0.062” per second. The grinders shaved a total of 0.028” off the outside diameter of the tire in two passes within a cycle that totaled 103 seconds.
 
In addition to improving values on  radial runout and radial forces, the dual stone grinders remove pin vents. Opposing directional rotation eliminates heel-toe grinds.
 
For ease-of-use in the production environment, PGM provides a Windows-based user interface to set up grind recipes that can satisfy the most demanding end customer specification. Recipes can specify the desired final profile provided by the machine laser or uploaded CAD file.
 
Other definable recipe parameters include:
  • Grind stone rpm and vertical/lateral feed rate
  • Tire inflation pressure
  • Tire rim spacing
  • Tread width
  • Number of grind passes
  • Individual grind depth per pass

PGM offers different production modes to ensure flexibility for tire processing. For example, require the machine laser to scan each tire to determine the precise amount of rubber removal required to correct high points. Or, use the machine laser-created data profile to indicate the center of the tread compared to the centerline of the machine. This method provides a precise grind-path for each tire type, regardless of tire width.
 
The combined features of PGM, insure uniformly round, smoothly-ground tires with reduced radial force, runout, and fore and aft forces. Good for your customers, good for the environment!

GET A PRICE QUOTE TODAY!

        
READ MORE AT WWW.POLINGGROUP.COM/sidewall_pgm.html
<< BACK TO NEWSLETTER INDEX
More Information on PGM
PGM Video

The two charts below show Tire Waveform readings before and after a 150 second grind. Note how the Radial Force, Radial Run Out and Conicity were ALL THREE corrected.

 

RPP

CON

CRRO

 

lbs.

daN

lbs.

daN

mm

inch

Test 1

22.4

9.96

-5.2

-2.31

0.9398

.037

Test 2

22.8

10.14

-5.1

-2.26

0.9144

.036

 

RPP

CON

CRRO

 

lbs.

daN

lbs.

daN

mm

inch

Test 1

17.6

8.72

 0.3

0.13

0.0762

.003

Test 2

17.3

7.68

 0.4

0.17

0.0508

.002

 
© 2010 Poling Group. All Rights Reserved
Phone : 330.753.1077      Online : www.PolingGroup.com      Email : Sales@PolingGroup.com