Air cylinder cover water draining sleeve water feeding hole sand core tenon and mounting technique thereof

Abstract

The invention discloses an air cylinder cover water draining sleeve water feeding hole sand core tenon and a mounting technique of the tenon. The tenon is characterized in that a water draining sleeve sand core is arranged on a chassis core, convex tenons of the water draining sleeve sand core are inserted in concave tenon pits of the chassis core, non-following tenons are arranged on the contact portions of the convex tenons and the concave tenon pits, the non-following tenons are made in cooperation with concave holes of the concave tenon pits, when the non-following tenons of the convex tenons are arranged in the concave tenon pits, first clearances, second clearances, third clearances, slope distances and the non-following tenons are formed in the clearances between the non-following tenons and the pit walls, the length of the non-following tenons is more than 1/2 of that of the convex tenons, the convex tenons and the non-following tenons are round, and the concave convex pits are round. The technique has the advantages that casting burrs are reduced, core assembling mistake prevention can be achieved, the assembling and positioning precision of the sand core can be improved, and the technique is suitable for the process design of various air cylinder cover water draining sleeve water feeding hole sand core tenons.

Description

technical field [0001] The patent of the present invention relates to a process design method for the tenon of the water hole on the sand core of the water jacket under the cylinder head. Background technique [0002] The shape of the tenon of the upper water hole of the lower water jacket of the traditional cylinder head is designed as a round core along with the shape of the upper water hole. figure 1 There is a gap at the second gap in the height direction. After the upper water jacket core and the chassis core are assembled, the upper water jacket core is deformed under the action of gravity, and the gap at the second gap at position 2 becomes smaller, so that the entire water jacket core is partially As the sand block moves down, the wall thickness formed by the upper water jacket core and the chassis core will become thinner, eventually resulting in uneven local wall thickness of the casting. For example, the theoretical wall thickness of the process design for the co...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of deformation of the water jacket core under the cylinder head after the core is assembled. In addition, this patent has the advantages of reducing the casting edge, preventing errors in the core assembly, and improving the assembly and positioning accuracy of the sand core.

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