FAW Jiefang J6L cab shell

Quick Details

When the engine room driving oron valve and valve seat in the operation is very easy to wear, so how to repair it? Combustion chamber inlet leads to corrosion of valve and valve seat. Engine valve and valve seat wear failure makes the inlet and exhaust ports is not tightly closed, causing the engine to leak, cylinder pressure on the machine tool that will cut off valve seat. The valve seat is cutting to thin, valve seat and valve seat bottom shrinkage and loss of interference fit in the cutting force of the valve seat together with the cutter rotation, the results may lead to the size change of valve seat bottom, roundness does not satisfy the induction heating method, induction heating is based on the principle of electromagnetic induction to a a method of power frequency power conversion into specific frequency bands and heating of metal materials. Induction heating system is mainly composed of the induction coil, AC power supply and the composition of the technical requirements of the workpiece. Therefore, using this method to ensure the removal of the valve seat, valve seat and seat bottom good fit, generally need to expand the size of the valve seat bottom tool, while using the corresponding increase the outer diameter of the valve seat and supporting the use of. A drawing method is used for drawing tools directly from the valve seat on the cylinder cover drawing out. For example, a round face upside thread first in the valve seat, then the corresponding size of the threaded rod is screwed into the valve seat, the valve seat and the vertical threaded rod case with a hammer tapping threaded rod, to pull out the valve seat. Will changing the size of the valve seat bottom basically by drawing method, changing the size of the amount depends on the drawing tool and drawing force. The welding equipment on the valve seat electrode for heating, in order to destroy the valve seat and valve seat bottom fit to. The usual practice is to use the electrode along the inner surface of the valve seat when the valve seat is continuous and uniform welding, heated red, immediately poured cold water on the valve seat, the valve seat will usually break. This method can be used to reduce maintenance time and reduce maintenance cost of