Die carrier for ceramimetallurgical automotive engine piston

Abstract

The invention provides a die carrier for a ceramimetallurgical automotive engine piston. On the basis of a pull down type standard die carrier, the positions and structures of parts such as a first lower punch, a second lower punch and a third lower punch are reasonably distributed and designed; after a powder loading shoe loads piston powder into a female die cavity of the die carrier, compression molding of the automotive engine piston is completed by using the lifting action of a lifting rod, the locating action of a sliding block and a yoke-shaped plate and the pressure action of the upperand lower punches; then the whole die carrier is put into a high-temperature furnace and is heated till the temperature is below a powder liquid phase line, and the temperature is preserved for a period of time to complete manufacturing of a ceramimetallurgical blan of the piston; and finally, the automotive engine piston is manufactured and molded through machining of an air ring, an oil ring and the like. According to the die carrier, the automotive engine piston with high quality, high compactness and high intensity can be manufactured, and an aluminum-silicon engine piston with uniform ceramic particles or enhanced gradient can be manufactured more conveniently; and machining and the waste of materials are effectively reduced.

Description

technical field The invention belongs to the field of powder metallurgy automobile parts, and in particular relates to a mold base for powder metallurgy automobile engine pistons, which is suitable for manufacturing high-quality, high-density, high-strength automobile engine pistons, especially aluminum-silicon engines uniformly reinforced by ceramic particles Pistons and aluminum-silicon engine pistons reinforced with gradient ceramic particles. Background technique The engine is the device that provides power for the whole vehicle, which can be called the "heart" of the car, and the engine piston plays an important role in the work of the engine and is a key part of the engine. Due to the harsh service environment, pistons often need to withstand large mechanical loads and high thermal loads. Therefore, pistons are generally required to have low density, high strength, good wear resistance, high temperature resistance, good thermal conductivity, fatigue resistance, and goo...

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Problems solved by technology

Aiming at casting defects such as slag inclusions, pores, shrinkage cavities, and cold shuts that may exist in the existing piston manufacturing process, casting riser materials, energy waste, a large number of processing defects such as tearing and burrs during mechanical processing, and complex production equipment, It is difficult to achieve a series of problems such as uniform distribution and gradient distribution of reinforced particles. The present invention proposes a mold base for manufacturing high-quality, high-density, high-strength automobile engine pistons by powder metallurgy, which is more convenient for manufacturing ceramic particles with uniform or Gradient-enhanced aluminum-silicon engine pistons effectively reduce machining and material waste

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