Transactions of Materials and Heat Treatment

Title：Structural performance of plunger cylinder connected by a double ball hinge

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ClassificationCode：TG315

year,vol(issue):pagenumber：2021,46(5):158-162

Abstract：

For the plunger cylinder connected by a double ball hinge of free forging hydraulic press, the working condition of plunger cylinder was analyzed based on the self-lock condition of ball hinge, and the self-lock eccentricity was studied when the workpiece was extruded by a connecting ball pair hinge. Then, the movement condition of connecting ball hinge pair for plunger cylinder was determined to provide basis for the rational use of connecting ball hinge pair for plunger cylinder. Furthermore, based on the structure characteristics of plunger cylinder, the mechanical model of plunger was built, the force state of plunger was analyzed, the side thrust of plunger to guide sleeve and pressure sleeve was studied, the conditions of controlling side thrust for plunger cylinder were analyzed, and it was clear that the pressure sleeve was the critical factor for restricting the bias load resistance of working cylinder. Finally, combining the characteristics of the guide structure and the force analysis of plunger, the technical defects of the guide structure for plunger cylinder in use were elaborated, and the structural scheme for improving the bias load resistance performance of plunger cylinder was proposed to provide effective support for the structural design of plunger cylinder for large free forging hydraulic press.

Funds：

国家自然科学基金资助项目（51265022）；甘肃省科技计划资助项目（145RJZA187）

刘艳妍（1964-），女，学士，教授 E-mail：liuyy@mail.lzjtu.cn

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