Pressure controlled grinding the new way
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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

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Pressure controlled grinding the new way l.jpg

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

Pressure controlled grinding- the new way


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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 )


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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 ...


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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.


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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


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How ? Does it work

  • Technical explanation


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How ? Does it work

  • Pressure controlled contour adjustment for bend or conical tubes

  • Example for stainless steel tube polishing


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How ? Does it work

  • Pressure loaded pinch rolls for tube transport


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How ? Does it work

  • Pinch rolls positioned beside each polishing head


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How ? Does it work

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






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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


Applications l.jpg

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

Applications


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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


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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


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