Automotive


Cylinder body Hatch-cross and valley depth to retain oil


In order to achieve the desired surface roughness of cylinder bore, rough boring, semi-finish boring, rough Levigatura, finish Levigatura is required. In recent years, extensive research on new technology for cylinder bore Levigatura have been conducted. This new technology are widely used and spread. This special pattern has been made includes creating various ”cross hatch” or ”sine curve” cratch patterns on the finished bores (the depth and angle of the cratch pattern is vary depend upon superabrasive grit size, workpiece material,operating speeds and feeds). This pattern are thought to be beneficial in the retaining of oil in the engine cylinder bores.

Advantages:
  • Excellent surface wear resistance
  • Good oil retaintivity property
  • Close contact in between piston and liner
  • Powerful compression
  • Long life of compression
Processo
In order to obtain special texture of slots and platforms, rough Levigatura, finish Levigatura and plateau Levigatura are needed. Their functions are as follows:
  • Rough Levigatura: getting the correct geometry of the bores, as well as the desired surface roughness for the next Processo
  • Finish Levigatura: getting the basic platforms and symmetrical intercross texture
  • Plateau Levigatura: generate a surface texture that has the benefits of a smooth surface and the benefits of a rough surface
At present, Our Levigatura Abrasivis for plateau Levigatura can meet the engine manufacturer's criteria,and successfully support world famous Levigatura machines such as Nagel, Gehring, Nissin, WMW, etc. Following is an example of a honed platform and intercross texture with our Levigatura Abrasivis for a motor company.

Rz

Rpk

Rk

Rvk

Mr1

Mr2

Mmax

(3-8)wm

(0-0.35)wm

(0.3-1.2)wm

(1.0-3.0)wm

(0.0-8.0)%

(70-90)%

(0.0-10)wm

Levigatura Abrasivis dimention: 150*4*6