The processing device of drop-shaped piston ring land riser

Abstract

The invention provides a processing device for a drop-shaped piston ring shore riser, which includes a base for placing the shape of a piston mold, a gantry-shaped support frame is provided on the top surface of the base, and a crossbeam for passing a connecting rod is provided on the support frame. The upper end of the connecting rod is provided with a handle, the lower end of the connecting rod is connected with a drop-shaped pressure block, and the side of the base is provided with a positioning block. By using the processing device of the present invention to process the piston ring land riser, the original straight strip riser shape can be changed into a water drop shape riser, and the poor casting hole of the piston ring land position is significantly improved, and the defective rate is reduced from 1.2% to 0.5% % below, which greatly improves the production demand and quality requirements, and ensures the quality of the piston.

Description

technical field [0001] The invention relates to the technical field of piston casting quality, in particular to a tool for manufacturing a drop-shaped piston ring land riser. Background technique [0002] There are two main methods of gravity casting of aluminum alloy pistons: inverted type (piston head facing down during casting) and upright type (piston head facing up during casting). The two casting methods have their own advantages and disadvantages. The advantage of inverted type is that the production method is simple and the cost is low. The disadvantage is that casting holes are easy to appear in the piston ring bank, and the upright type has complex process, high cost and fast efficiency; while the inverted type piston gravity casting aluminum water is mainly concentrated in the head under the piston, and it needs to be fully replenished when it solidifies. Shrinkage, the shape of the riser at the piston ring bank was originally designed as a straight shape, and the...

AI Technical Summary

Problems solved by technology

[0002] There are two main methods of gravity casting of aluminum alloy pistons: inverted type (piston head facing down during casting) and upright type (piston head facing up during casting). The two casting methods have their own advantages and disadvantages. The advantage of inverted type is that the production method is simple and the cost is low. The disadvantage is that casting holes are easy to appear in the piston ring bank, and the upright type has complex process, high cost and fast efficiency; while the inverted type piston gravity casting aluminum water is mainly concentrated in the head under the piston, and it needs to be fully replenished when it solidifies. Shrinkage, the shape of the riser at the piston ring bank was originally designed as a straight shape, and the average casting defect rate of the inverted type was 2%, of which the casting hole defect rate at the ring bank was 1.2%, accounting for 60% of the total defects. It can be seen that the straight bars The shape design cannot make it have sufficient shrinkage, and the products produced cannot be used in the next process due to casting holes, which cannot meet the production and quality requirements, resulting in waste of resources

Images