A kind of inverted core assembly method

Abstract

The invention discloses an inverted core assembly method. Through a specific device, the plane of the middle section of each tank hole core is used as a positioning plane during core assembly. The plane is not prone to get worn and collided and is scientific and the relative size between the tank hole cores after the cores are locked can be well guaranteed. By adopting the core assembly method and a lock core rack, compared with the prior at, for the method, the size error of a lock core in each direction is greatly reduced, the yield is increased and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of casting technology, in particular to a casting technology suitable for engine cylinder body castings. Background technique [0002] In the prior art, when working on the lock cylinder, the vertical core assembly method (place the cylinder bore core with the crankshaft hole facing down and the cylinder bore upward) or the horizontal core assembly method (place the cylinder core cores horizontally side by side) . But both methods have their limitations. [0003] The main points of the vertical core assembly method are: the lower plane of the cylinder bore core is used as the positioning surface; the adhesive is applied between the sand cores, and the distance between the cylinder bore cores is compressed by the lock core screw, so that the sand core wears less during the movement process. The size of the sand core is large and the wear amount of each sand core is different, which will easily cause the positioning s...

AI Technical Summary

Problems solved by technology

[0003] The main points of the vertical core assembly method are: the lower plane of the cylinder bore core is used as the positioning surface; the adhesive is applied between the sand cores, and the distance between the cylinder bore cores is compressed by the lock core screw, so that the sand core wears less during the movement process. The size of the sand core is large and the wear amount of each sand core is different, which will easily cause the positioning surface to be uneven, resulting in a dimensional deviation in the X direction (the direction from the crankshaft hole to the cylinder hole), and a deviation in the Z direction (the width direction of the crankshaft hole) due to the design gap of the sand core. A certain thickness, resulting in deviation in the Y direction (direction from the first crankshaft hole to the fifth crankshaft hole)

[0004] The main points of the horizontal core assembly method are: the inclined cone surface on the top of the cylinder hole core is the positioning surface, the adhesive is applied between the sand cores, and the lock core screw is used to compress the distance between the cylinder hole cores, and the sand cores are easy to break when placed horizontally; The positioning of the inclined cone surface may easily cause the sand core to not be combined in place, resulting in positioning errors and resulting in X-direction dimension deviations, and due to the existence of a certain thickness of the adhesive, resulting in Y-direction deviations

Images