Engine vlave CBN grinding wheel

Valve is made of valve head, valve seat and valve stem three parts. The valve head is the entire lower area of the valve, with the valve face and inner rounded corners. The force produced by combustion pressure is applied here.     

The main parts of valve grinding include:
► Valve cut off grinding
► Valve shaft centerless grinding 
► Valve head & seat grinding
► Valve groove & tip raduis grinding
► Valve stem end grinding
► Valve seat grinding
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Valve base cutting

Using profile CBN high speed  grinding wheel to cut the stem of engine valve in order to control the total length of engine valve. Metal CBN grinding wheel havev high material  removal, good shape retention, is the ideal tool for cutting valve base. Using Moresuperhard metal CBN grinding wheel to achieve profile accuracy.

Valve  Disc end face grinding

Metal CBN grinding wheel with fine  grit is suitable for finish grinding the end face of vlave disc.

Valve keeper groove grinding

Many varieties of valves (including the valve with asymmetric groove shape of the keeper groove) contain the keeper groove in the quenching area of the rod end. Considering the stress effect of hot processing on the keeper groove, the keeper groove shape is often processed by forming the keeper groove grinding after quenching. Therefore, it is an effective way to ensure the machining accuracy of the air lock groove by using the forming grinding method of the valve keeper groove.     

CBN grinding wheel has the characteristics of high sharpness and wear resistance, high hardness and large grinding ratio. Engine valve grinding processes include external grinding, valve disc seat grinding, chamfering grinding, arc grinding and other parts. Groove profiles using Moresuperhard Electroplated CBN grinding wheel, valve keeper groove profiles can be formed precisely with accuracy down to the micrometre. 

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Valve seat grinding

* For pre-grind valve seat:

Using  Moresuperhard electroplated CBN grinding wheel . 

* Fine grinding :

Vitrified CBN  grinding wheel has good cutting performance, good thermal stability and chemical stability, good self-sharpeness, using Moresuperhard vitrified CBN diamond grinding wheel can achieve high precision valve seat. Regular dressing can guarantees constant component quality of valve seat.

How to grind valve ?