C616车床光杠为φ22×1439毫米,其中心弯曲允差为0.5毫米,光洁度■7。在大修时,我们总发现光杠严重弯曲,且键槽经长期使用,轴向受力角远超过规定值31°40′±20″,至使不能继续使用而报废。为此,我们选用19毫米的六角钢(40Cr)作为光杠材料,其全长弯曲允差仍为0.5毫米,仅加工装配轴承的两端,其余部分不加工。同时,将结合子圆孔改为六方孔(见图)。改革后,其轴向作用力便通过六个平面跟结合子作用传递到溜板箱,受力情况大为改善,且不易弯 The light bar of the C616 lathe is φ22 × 1439 mm with a center bending tolerance of 0.5 mm and a finish of 7. In the overhaul, we always found that the light bar serious bending, and the long-term use of the keyway, the axial force angle far beyond the specified value 31 ° 40 ’± 20 ", so that can not continue to use and scrapped .To this end, we use 19 mm Of the hexagonal steel (40Cr) as a light bar material, its full length bending tolerance is still 0.5 mm, only the assembly process both ends of the bearing, the rest of the non-processing.Meanwhile, the combination of round hole to hexagonal hole (see photo) After the reform, its axial force is transmitted to the skateboard through six planes and a combination of sub-functions, which greatly improves the force and is not easily bent