不同軌道牙型之滾珠元件在高接觸壓力下的磨潤性能研究

Effect of groove shape in ball parts on tribological properties under high contact pressure

丘明遠(Ming-Yuan Chiu)

指導教授 ： 洪政豪

國立虎尾科技大學/工程學院/機械與機電工程研究所/碩士(2015年)

https://doi.org/10.6827/NFU.2015.00172

摘要

本文研究單顆滾珠在不同牙型與接觸角的軌道運動情形，並設計製造一台創新單滾珠實驗機台，在不同的軌道溝槽形狀下(哥德式、梯型式、V型式)，進行不同初始接觸角之高接觸壓力實驗，希望可做為未來作為重負荷滾珠螺桿、全電式射出成形機、滾珠軸承等設計參考方向之一。
實驗結果顯示在不同牙型，固定軸向負載與轉速的條件下，接觸面壓是隨著初始接觸角、軸向負載、接觸角而變化。哥德牙在相同軸向負載，增加轉速;或相同轉速增加負載，接觸角度偏移量均會增加，接觸角增加導致法向負載升高，摩擦係數也相對增高，提高接觸面壓值，哥德牙型適當地增加牙型係數與減少初始接觸角可有效降低摩擦係數的值、減少接觸面壓，增加傳動效率。梯型式與V型式在相同軸向負載，增加轉速;或相同轉速增加負載，接觸角度偏移量也均會增加，同樣會導致法向負載升高，提高接觸面壓值，唯一與哥德牙型不同的是，梯型式與V型式反而是增加初始接觸角，可以降低摩擦係數。在高負荷高轉速環境下，本實驗顯示以哥德式牙型係數0.55、初始接觸角45度的摩擦係數比V型式、梯型與牙型0.52低，在高負荷低轉速環境下則以V型式初始接觸角55度比其他軌道牙型與條件的磨擦係數低。

關鍵字

哥德牙型 ； 梯型牙型 ； V型牙型 ； 接觸角 ； 磨潤

並列摘要

The article discusses orbit movement of the single ball in different groove shape and contact angle. Meanwhile, it designs a innovative experiment machine for the single ball, where the experiment on different initial contact angle(Gothic, V type, trapezoid type) under high contact pressure can be operated, on the condition of different orbit groove shape, which is supposed to be one of the development direction of Heavy-Duty Ball Screw, All-Electric Injection Molding Machine and Ball Bearings.
The experiment result shows that in the case of fixed axial load and rotation speed, contact pressure changes with initial contact angle, axial load and contact angle. Gothic groove shape loads in same axial, rotation speed increases; Gothic groove shape loads in same rotation speed, contact angle and offset increase. Contact angle increasing leads to normal load increasing, so friction coefficient increases accordingly. If contact pressure increasing, friction coefficient and contact pressure can be reduced effectively and transmission efficiency can be increased by Gothic groove shape increasing groove shape factor properly and reducing initial contact angle. Trapezoid type and V type load in same axial, rotation speed increases; they load in same rotation speed, contact angle and offset increase, which lead to normal load and contact pressure increase. The only difference from Gothic groove shape is that Trapezoid type and V type increase initial contact angle, which can reduce friction coefficient. In the case of high load and rotation speed, the experiment result shows, when Gothic groove shape factor is 0.55, initial contact angle is 45°, friction coefficient is lower that with 0.52 Trapezoid type and V type. In addition, in the case of high load and low rotation speed, when initial contact angle of V type is 55°, friction coefficient is the lowest compared to that on other conditions.

並列關鍵字

Gothic groove ； Trapezoid type groove ； V type groove ； Contact angle ； Tribology

參考文獻

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