極限載荷狀態下軸承安全性核算

Bearing Safety Accounting Under Loading Limit

陳振益 ； 張建 ； 徐從占

《機械工業雜誌》 438期 (2019/09) Pp. 77-80

摘要

隨著機械加工的現代化、自動化程度的提高和四軸、五軸聯動搭載的普及，讓顧客希望能在一次裝夾獲得更多的加工範圍，進而提高加工效率以及消除因為多次裝夾帶來的定位誤差，因此機床帶來了新的需求：更高速度、極限加工時有更高的安全性。在極限載荷下，軸承的安全性核算就變得非常重要。本文利用有限仿真軟件模擬機床在極限工作條件下的工況，對於高速精密主軸內的核心部件（角接觸軸承）的接觸應力進行求解，通過對求解值的分析，來判定機床在極限載荷狀態下的安全性。

關鍵字

極限載荷 ； 接觸應力 ； 角接觸球軸承

並列摘要

With the advance of machining, and the increase of the automation, the four-axis and five-axis transmission equipped on machine has become popular. Customers want to manufacture more materials by one time loading and unloading, as well as to enhance machining efficiency, eliminate positioning errors because of multiple times of loading and unloading. Therefore, it brings machining center new requirements: higher rotating speed and more safe during machining under the extreme conditions. In the case of loading limit, safety calculation of bearing becomes much important. In this article, we use the simulation software of finite element to simulate machining under the extreme situations with the focus placed on obtaining contact stress of angular balls in the high-speed precision spindle. With analyzing the values, the safety of machining center under the loading limit can be determined.

並列關鍵字

Loading limit ； Contact stress ； Angular contact ball bearing