1'Who Has pressure controlled grinding

1
Pressure controlled grinding- the new way

• Chapter
• 1. Who ? Has pressure controlled grinding
• 2. Why ? Has pressure controlled grinding
  benefits
• Comparison stiff grinding versus pressure
  controlled
• 3. How ? Does it work
• Technical explanation sketch and drawings
• 4. Where ? Can it be incorporated
• Video presentation Customer Phoenix Tube /
  USA Video examples of machinery round, flat,
  center type

2
Who ? Has pressure controlled grinding

• Customers with high demand on constant surface
  finish
• ( like ornamental stainless, guide rails with
  bearing surface quality )
• Customers with tight tolerances which have to be
  maintained
• ( tolerance compliance for hydraulic components
  )
• Customers in Stainless steel, Steel and Chromium
  plating industry
• ( bend and unround tubing large size, critical
  layer thickness of plated products )
• Customers with curved profiles
• ( free axis polishing at implants, car wheels,
  car interiors )

3
Who ? Has pressure controlled grinding

• US companies like
• Sandvik, Schoeller Bleckmann ( Tubacex ),
  Greenville Tube
• Phoenix Tube, Salem Tube, Romac Metals, Royal
  Precision, Industrial Hard Chrome, Scot
  Industries, Savic Superchrome...
• Worldwide companies like
• Thyssen, Schmolz Bickenbach,
• Avesta, AB Sandvik, Arfa, Voss
• Tubacex, Butting, Fischer,
• Kieselmann, Metalfinish, Schoeller
• Bleckmann, Ugine, Vallourec,
• Framatome, British Steel,
• Shanghai Stainless, Stappert ...

4
Why ? Has pressure controlled grinding
benefits

• Comparison stiff grinding versus pressure
  controlled grinding

Stiff system with slides The head is in a
fixed position and can not follow the contour of
a not perfectly round tube. Bend tubes are
pressed through multiple stations and cause high
variations in the grinding pressure seen on the
ammeter which shows the load of the grinding
motor
Pressure controlled with pivot point The
head is flexible mounted on a pivot point. By air
cylinder it can follow the surface of a unround
tube. The regulating wheel is mounted the same
way and insures a self centering of the tube.
Constant grinding pressure can be seen on the
constant load of the motor.
5
Why ? Has pressure controlled grinding
benefits

• Comparison stiff grinding versus pressure
  controlled grinding

Stiff system with slides Pressure
variations cause reduced belt live Variations in
the finish Variations in the tube speed as it
passes through the stations ( Spinning of tubes
) Variations in the noise level
Pressure controlled with pivot point Smooth
run, improved belt life with economic
efficiency Constant stock removal and finish over
the entire tube surface Reduced noise level due
to a constant noise level Higher grinding speeds
possible No risk of overloading belt and motors
6
How ? Does it work

• Technical explanation

7
How ? Does it work

• Pressure controlled contour adjustment for bend
  or conical tubes
• Example for stainless steel tube polishing

8
How ? Does it work

• Pressure loaded pinch rolls for tube transport

9
How ? Does it work

• Pinch rolls positioned beside each polishing head

10
How ? Does it work

• Secure transport of the tube due to pinch rolls
  each side of the grinding head

11
How ? In centerless polishing - horizontal
stations
12
How ? In centerless polishing - vertical stations
13
How ? In flat polishing - vertical stations
14
How ? In double side flat polishing pivot point
stations
15
Where ? Can it be incorporated

• Centerless polishing machines
• Center type polishing machines
• Flat polishing machine
• Superfinishing machines
• Shape polishing machines
• Robot finishing cells
• Back stand machines

16
Applications

• Grinding of tubes for customer Phoenix Tube / USA
• PLC controlled with memory for tube dimensions
  and grinding sequence
• 12 station grinding,polishing and sleeving
  machine for tubes and bars

17
Centerless pressure controlled polishing

• Grinding of stainless steel tubing of large
  diameters WUMAG / GERMANY
• 2 Station grinding and polishing machine with
  double head
• SIEMENS - PLC controlled

18
Flat pressure controlled polishing

• Flat grinding of flat stainless steel bars or
  tubes
• with return conveyor for 6 x 6 parts
• Inside view of grinding head