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195柴油机使用一段时间后,其曲轴轴颈常出现失圆的情况,尤其是连杆轴颈此种现象更为突出.此时,报废实为可惜,上曲轴磨床加工又很不合算.一般都是用手工锉和用砂布打磨.存在的问题是一不能保持曲轴颈均匀对称,二是尺寸无法掌握,此法会出现连续烧瓦的现象,现介绍一种简单实用的方法供参考使用.轴颈不圆度超限后,可做一个铸铁套,其外径与轴瓦相等,宽度比轴颈工作长度小0.2mm左右,内径按修后轴颈所要求的配套尺寸加工,两端孔口的倒角略大于轴颈两端的圆角,然后将该套一分二,做成一副铸铁瓦片,再做几个0.1—0.3毫米的调整垫片,用来调整磨合间隙和防止铸铁瓦片在磨合时转动.修磨时将铸铁瓦片装入连杆,在轴颈上均匀地涂上一层细凡尔砂,然后再选择合适厚度的调整垫片将连杆装在曲轴上,拧紧螺钉以能顺利转动又稍有阻力为适度.将曲轴架起,手扳连杆转动,隔一会将曲轴转动一个角度,磨合一段时间后拆开检查一次.直到曲轴两圆度尺寸达到配合要求为止.最后擦净凡尔砂,用于净布或草绳对轴颈加以抛光即可.
195 Diesel engine crankshaft journal often appear after a period of time out of round, especially the connecting rod journal this phenomenon is more prominent at this time, scrapped it is a pity that the upper crankshaft grinding machine processing is not cost-effective. Is the use of hand files and emery cloth. The existing problems are not able to maintain a uniform crank shaft symmetry, and second, the size can not grasp this method will appear the phenomenon of continuous burning tile, is now introduced a simple and practical method for reference. Neck non-circularity overrun, can be made of a cast iron sleeve, the outer diameter and bush equal, the width of the working length of about 0.2mm smaller than the journal, the inner diameter of the journal required by the repair of the matching size processing, both ends of the orifice Chamfer slightly larger than the fillet at both ends of the journal, and then the set of two, made of a pair of cast iron tiles, do a few 0.1-0.3 mm adjusting shims, used to adjust the running-in clearance and prevent cast iron tiles When running in. Grinding the cast iron tile into the connecting rod, the neck evenly coated with a layer of fine sand, and then select the appropriate thickness of the adjusting shims will be installed in the crankshaft connecting rod, tighten Screw to be able to smooth rotation and a slight resistance as moderate .Crankshaft rack, hand lever Rod rotation, the crankshaft will be separated at an angle, after a period of time apart open the inspection until the two roundness of the crankshaft size meet the requirements so far .Finally clean the sand, for net cloth or straw rope on the shaft to be Polishing can be.