Optimization of Processing Methods for Powder Metallurgy Oil Bearing Hole and Expanding Force Calculations

Abstract

Abstract:

A new type processing method was put forward for powder metallurgy oil-retaining bearing holes. According to the characteristics of powder metallurgy oil-retaining bearing material, an unit mechanics model of hole diameter deformation area was established.Considering the material work hardening in the expanding process and the influence of hydrostatic pressure in deformation and densification process,a bearing expanding force formula was derived through the slab method, and an aluminum oil-retaining bearing was tested with self-designed equipment. The rationality and correctness of expanding force formula and the new type method were proved by expanding tests.

Key words: oil-retaining bearing, unit mechanics model;work hardening, hydrostatic pressure

摘要：

提出了一种新型粉末冶金含油轴承内孔的加工方法，根据粉末冶金含油轴承材料特点，建立了扩径变形区单元体力学模型，考虑材料扩径过程中的加工硬化以及静水压力在粉末冶金材料塑性变形与致密过程中的影响，通过主应力法推导出含油轴承扩径力解析式，并用自行设计的加工设备对铝基含油轴承进行了扩口实验，进一步验证了新加工方法的可行性及扩径力公式的合理性。

关键词: 含油轴承, 单元体力学模型, 加工硬化, 静水压力

CLC Number:

TG302

Cai Jinda;Xu Pengcheng. Optimization of Processing Methods for Powder Metallurgy Oil Bearing Hole and Expanding Force Calculations[J]. China Mechanical Engineering, 2013, 24(21): 2876-2880.

蔡锦达;许鹏程. 粉末冶金含油轴承内孔的加工方法优化与扩径力计算[J]. 中国机械工程, 2013, 24(21): 2876-2880.

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