Air Quenching Method and Device Applicable to Engine Pistons

Abstract

The invention provides an air quenching method and device suitable for engine pistons. The method includes the following steps: Step 1: Clamp the engine piston to be quenched between upper and lower clamping rods, and the clamping rods respectively include clamping rods. Hold the head and bearing; Step 2: Set up a compressed air nozzle that is eccentric to the left and right of the axis of the engine piston around the engine piston, and spray compressed air to the engine piston through the compressed air nozzle, so that the engine piston will revolve around its own axis under the action of compressed air Rotary, where the engine piston is cast from aluminum alloy or aluminum matrix composite. The present invention utilizes the compressed air generally available at the production site as the air source for the air quenching of the engine piston. The high-speed airflow formed by the compressed air ejected from the nozzle in the compressed state itself has the cooling effect of expanding and absorbing heat. At the same time, the high flow rate can Takes heat away quickly.

Description

technical field [0001] The invention relates to the manufacture of engine pistons, in particular to an air quenching method and device suitable for engine pistons. Background technique [0002] The piston of the engine is generally cast from aluminum alloy or aluminum-based composite material. In order to ensure its mechanical properties, it is necessary to quench the piston after casting. In order to save cost and time, the piston can be quenched instantly by using the residual heat of casting. In the prior art, the quenching method of directly putting the piston into cold water after taking it out from the casting mold is generally adopted. However, this water-cooled quenching method has the risk of cracking at the joint between the piston ring and the substrate due to water infiltration. At the same time, there are problems such as serious water pollution, uneven color on the piston surface, water temperature needs to be controlled, and the water tank needs to be cleaned...

AI Technical Summary

Problems solved by technology

However, this water-cooled quenching method has the risk of cracking due to moisture infiltration at the joint between the piston ring and the substrate. At the same time, there are problems such as serious water pollution, uneven color on the piston surface, water temperature needs to be controlled, and the water tank needs to be cleaned regularly.

In the prior art, air-cooled quenching is also used, but the cooling rate is not fast enough, the cooling is not uniform enough, and the performance of the piston after quenching is difficult to meet the requirements.

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