气缸的修理（Cylinder repair）.docVIP

气缸的修理（Cylinder repair） Boring cylinder, together with enlarged piston and ring, is called increasing repair size in the repair of engine cylinder. Boring cylinder because the cylinder bore in the use of partial wear phenomenon, wear larger cylinder shape is not round, compressed air leakage phenomenon. Therefore, it is necessary to use a special boring machine to expand the bore of the cylinder to 0.25-1.00mm, thus prolonging the service life of the cylinder. 1. detection of cylinder wear The degree of cylinder wear is generally measured by two indexes, roundness and cylindricity. And Santana, Jetta, Fukang and other imported models are measured by the standard size and the maximum size of the cylinder. (1) the position of the measuring cylinder. When measuring, use the appropriate range of cylinder tables according to the location and requirements shown in figure 1. That is: in the upper part of the cylinder from the cylinder on the plane 1Omm, the middle of the cylinder and the lower part of the cylinder, from the lower part of the cylinder 1Omm three points, according to A, B two directions were measured once. Be careful not to measure the inner diameter of the engine cylinder on the engine repair platform, in case the cylinder is clamped and deformed. (2) the method of measuring cylinder. The cylinder measuring, first with a micrometer by cylinder standard size will amount to adjust the cylinder table pointer at scale 0 (the amount of compression rod cylinder table should enable 1-2mm to give allowance, then measure the diameter measurement). The readings thus measured, together with the nominal size of the cylinder, are the diameter of the cylinder after wear. When measuring, the measuring rod and the cylinder must be perpendicular to the central line. You should swing the watch rod slightly and measure the minimum reading indicated by the cylinder gauge, that is, the correct cylinder diameter. The amount of cylinder meter to measure in the A direction, remembe