本文選題：制動(dòng)器　切入點(diǎn)：疲勞　出處：《機(jī)械設(shè)計(jì)與制造》2016年11期

【摘要】：對(duì)目前常用的汽車制動(dòng)器疲勞試驗(yàn)臺(tái)架的優(yōu)缺點(diǎn)進(jìn)行研究分析,進(jìn)行試驗(yàn)臺(tái)架的優(yōu)化設(shè)計(jì)。用扭矩傳感器替代液壓扭臂扭矩測(cè)量機(jī)構(gòu),解決了液壓系統(tǒng)易漏油問(wèn)題;在工裝夾具中加入心軸,改善工裝夾具的剛度性能,提高了試驗(yàn)的穩(wěn)定性;在試驗(yàn)臺(tái)上增加了恒溫箱系統(tǒng),可以對(duì)非常溫工況進(jìn)行疲勞測(cè)試。運(yùn)用正交試驗(yàn)對(duì)工裝夾具在滿足強(qiáng)度和剛度的條件下進(jìn)行輕量化設(shè)計(jì),對(duì)輕量化設(shè)計(jì)后工裝夾具進(jìn)行150℃工況下熱應(yīng)力分析和疲勞分析。根據(jù)金屬材料熱膨脹的特性提出了一種制動(dòng)器試驗(yàn)臺(tái)架的控制方法,可避免工件在發(fā)生熱膨脹后發(fā)生干涉的問(wèn)題。結(jié)果表明:加入芯軸后工裝夾具剛度提高15%;在應(yīng)力循環(huán)400000次下,工裝的疲勞損傷值為0.00379,工裝夾具使用壽命為10年。結(jié)果證明了疲勞臺(tái)架設(shè)計(jì)的可行性。
[Abstract]:The advantages and disadvantages of the commonly used automobile brake fatigue test bench are studied and analyzed, and the optimum design of the test bench is carried out.The torque sensor is used to replace the torque measuring mechanism of the hydraulic torsion arm to solve the problem of easy oil leakage in the hydraulic system, to improve the rigidity performance of the fixture and to improve the stability of the test by adding the core shaft to the fixture.The constant temperature box system is added to the test bed, which can be used for fatigue testing under very high temperature conditions.Under the condition of satisfying the strength and rigidity, the fixture is designed with orthogonal test. The thermal stress and fatigue analysis of the fixture after lightweight design are carried out at 150 鈩，

本文編號(hào)：1713917