| dc.description.abstract | Machine tool is the major key kernel equipment in process technology. Wearing clearance will occurred between table and slide of machine tool after long time operation. The clearance will cause vibration in the start instantaneous and influence the accuracy of machining. To avoid quick wearing between table and slide, valuation items such as wear resistance, Friction Coefficient and persistent of lubricant film, are important. Examine under different shape of oil slot(oil groove, oil hollow) and surface roughness(Ra6.3, Ra3.2, Ra1.6), the difference between surface contact angle, Friction Coefficient and wear quantity, and choose the best combination of minimum Friction Coefficient and its application by Taguchi method.
From the result of experiment, we find the contact angle is influenced by surface roughness and surface shape. Contact angle is increased with surface roughness, but under the same surface roughness, the surface shape produced by abrasive jet machining(AJM) method is random and irregular, and result to the difference between contact angle and machining surface.
By watching the surface of specimen after wear test(wear distance: 100m), oil hollow shape surface(Ra1.6) by abrasive jet machining(AJM) method will get the lowest Friction Coefficient (μ=0.07), the importance of influence of Friction Coefficient after analyzed by Taguchi method is: surface roughness>surface shape>loading pressure>sliding speed>lubricant volume. Long distance wear test(wear distance: 100m) under same lubricant volume and same parameter, oil hollow on the surface of specimen produced by abrasive jet machining(AJM) has the function of keep the oil and make the oil film difficult to break. Micro hill produced by oil hollow will be lapped, and produce the best sliding surface of loading and lower the Friction coefficient.
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