To provide a processing method of an outer ring flange part of a wheel bearing device which can grind a fastening face fastened with a bolt of the outer ring flange part so as to have surface roughness at which a regulated thrust force can be secured, and can shorten a grind processing time.SOLUTION: A fastening face 54 is lathe-turned so that a value which is obtained by calculating a friction coefficient μ of the fastening face 54 from the following regression equation with a kurtosis Rku of a roughness curve of the fastening face 54 fastened with a bolt 62 of an outer ring flange part 52 of a wheel bearing device 10, arithmetic average roughness Ra, and an average length RSm of a roughness curve element set as explanation variables reaches 0.088 or larger to 0.170 or smaller. μ=0.157-0.028×Rku+0.012×Ra-0.042×RSm/1000+0.0002×T. Here, T is the fastening torque of the bolt 62, and a value which is preset within a range of 64 Nm or larger and 96 Nm or smaller.SELECTED DRAWING: Figure 1
【課題】外輪フランジ部のボルトとの締結面を、規定の軸力を確保できる表面粗さとなるように旋削加工することができ、かつその旋削加工時間を短縮することができる車輪用軸受装置の外輪フランジ部の加工方法を提供する。【解決手段】車輪用軸受装置10の外輪フランジ部52におけるボルト62との締結面54の粗さ曲線のクルトシスRku、算術平均粗さRa、及び粗さ曲線要素の平均長さRSmを説明変数とした下記の回帰式から締結面54の摩擦係数μを算出した値が0.088以上0.170以下となるように、締結面54を旋削加工する。μ=0.157−0.028×Rku+0.012×Ra−0.042×RSm/1000+0.0002×T但し、Tは、ボルト62の締め付けトルクであり、64Nm以上96Nm以下の範囲で予め設定される値である。【選択図】図1
PROCESSING METHOD OF OUTER RING FLANGE PART OF WHEEL BEARING DEVICE
車輪用軸受装置の外輪フランジ部の加工方法
2020-10-29
Patent
Electronic Resource
Japanese
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