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| 铝合金车轮机加立车压爪紧固螺栓断裂问题的分析及优化 |
| Analysis and Optimization of Jaw Bolt Breakage in Aluminum Alloy Wheel Machining Process |
| Received:November 08, 2017 Revised:January 10, 2018 |
| DOI：10.3969/j.issn.1674-6457.2018.01.025 |
| 中文关键词: 压力传感器 力学模型 疲劳损伤 |
| 英文关键词: pressure sensor mechanical model fatigue failure |
| 基金项目: |
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| 中文摘要: |
| 目的 研究分析立车压爪螺栓工作过程中的受力情况，寻求螺栓断裂的原因，并通过优化改进夹具结构，实现提高螺栓使用寿命的目的。方法 采用压力传感器系统，实测压爪压力，并建立力学模型，结合螺栓的力学性能参数，推断螺栓断裂的原因。结果 通过优化改进夹具结构，将螺栓承受的部分弯矩转移到压爪和压爪轴上，能够延长螺栓的使用寿命。结论 螺栓断裂主要是由于螺栓反复加载过程中出现了疲劳损伤，导致螺栓断裂。 |
| 英文摘要: |
| The paper aims to find the cause of the bolt breakage by studying the force condition of the jaw bolt in the vertical lathe to improve the lifetime of the jaw bolt by optimizing the fixture structure. The pressure of the jaw was tested with a pressure sensor system. A mechanical model was built to deduce the cause of the bolt breakage in combination with mechanical property parameters of the jaw bolt. The optimized fixture structure can extend the bolt lifetime by transferring the bending moment beared by the bolt to the jaw and jaw axle. Fatigue failure which is produced in loading and unloading repeatedly leads to bolt breakage. |
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