吉林大学学报(工学版) ›› 2021, Vol. 51 ›› Issue (6): 2013-2020.doi: 10.13229/j.cnki.jdxbgxb20200633

• 材料科学与工程 • 上一篇    

一机六件等应力三点弯曲疲劳试验机的研制

严庆光1(),冯梓轩1,李湘吉2,王瑛玮1   

  1. 1.吉林大学 材料科学与工程学院，长春 130022
    2.吉林大学 辊锻工艺研究所，长春 130022
  • 收稿日期:2020-08-20 出版日期:2021-11-01 发布日期:2021-11-15
  • 作者简介:严庆光（1971-），男，副教授，博士. 研究方向：板材成形，模具设计与制造. E-mail：yanqg@jlu.edu.cn
  • 基金资助:
    国家自然科学基金项目(51275203);吉林省自然科学基金项目(20200201056JC)

Development about three⁃point bending fatigue experiment machine that can test six specimens at same time

Qing-guang YAN1(),Zi-xuan FENG1,Xiang-ji LI2,Ying-wei WANG1   

  1. 1.College of Material Science and Engineering，Jilin University，Changchun 130022，China
    2.Roll Forging Institute，Jilin University，Changchun 130022，China
  • Received:2020-08-20 Online:2021-11-01 Published:2021-11-15

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摘要：

为解决传统一机一件弯曲疲劳试验机效率不高的问题，研制了一种新型一机六件等应力三点弯曲疲劳试验机，用于检测H13钢的疲劳寿命。首先，通过压力机对试样施加载荷，并利用力传感器实时检测载荷是否超过许用值。当载荷超过许用值时，控制器立即撤销该试样上的载荷，而不影响其他试样进行疲劳试验。同时压力机继续加载，直到所有试样断裂，试验结束。该种疲劳试验机能同时对6个试样进行疲劳试验，提高了试验效率。

关键词: 材料科学与工程, 弯曲疲劳试验, 一机多件, 等应力, 三点弯曲, H13钢, 上位机

Abstract:

It is inefficient to test only one specimen using traditional bending fatigue experiment machine. A new bending fatigue experiment machine is proposed, which can test six specimens simultenously. The machine is used to test the fatigue life of H13 steel. Firstly, pressure load is applied to six specimens. Then, the force loaded on the specimens is measured by force sensors. The single load is cancelled immediately by the control system if one of the six specimens’ load is bigger than allowable load. Moreover, the fatigue experiment of other specimens is still proceeding. Finally, the bending fatigue experiment is finished as all specimens engender cracks and break due to fatigue. The fatigue life of the specimens is calculated by analyzing the experiment data. The efficiency of bending fatigue experiment is significantly increased via the test of six specimens simultenously.

Key words: material science and engineering, bending fatigue experiment, more specimens in once experiment, ISO-stress, three points bending, H13 steel, upper monitor

中图分类号: 

  • TG76

图1

以H13钢为原材料制造的模具"

图2

模具内影响产品性能的裂纹"

图3

一种非标件弯曲疲劳试验装置结构示意图"

图4

疲劳试验机中控制器系统的组成框图"

图5

金属弯曲疲劳试验圆柱形试样"

图6

三点弯曲疲劳试验的工作简图"

图7

一机六件等应力三点弯曲疲劳试验机的轴测图和主视图"

图8

一机六件的等应力三点弯曲疲劳试验机的加载荷装置部分剖视图"

图9

一机六件等应力三点弯曲疲劳试验的试验流程图"

图10

控制器系统整体框图"

表1

技术指标"

技术要求具体指标
测量压力/N0~100
ADC位数/位12
压力信号分辨能力/N0.1
放大器放大倍数/dB30
线性度/%F.S0.1
重复性/%F.S0.1
供电方式锂电池供电
供电电压/V11~16
传感器感应信号频率/Hz0~200
传感器使用温度/°C-20~70

图11

程序流程图"

图12

控制器系统整体图"

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