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连杆螺栓是发动机的重要紧固件,为预防连杆螺栓松动、断裂引起捣缸事故,必须正确选用与装配。(1)连杆螺栓的选用连杆螺栓是用优质合金钢(如铬钢或镍铬钢)经调质处理和精密加工制成,有较高的强度和韧性,在螺纹等级、形位公差等方面要求严格。它属于专用螺栓,不可用普通螺栓代替。使用过的连杆螺栓,装前应进行检查。当发现螺栓上有划痕、滑扣、裂口、凹痕、裂纹,或螺母装在螺栓上有松弛现象,或螺栓不能与螺栓孔紧密配合,或螺栓头
Connecting rod bolts are the important fasteners of the engine. In order to prevent the connecting rod bolts from loosening and breaking, they must be properly selected and assembled. (1) the choice of connecting rod connecting rod bolt is made of high-quality alloy steel (such as chrome steel or nickel-chromium steel) by quenching and processing and precision machining, high strength and toughness, thread level, form tolerance And other aspects of strict requirements. It belongs to a special bolt, can not be replaced with ordinary bolts. Used rod bolts, pre-loaded should be checked. When there are scratches on the bolt, sliding buckles, rips, dents, cracks, or nuts are loosely fitted on the bolt or the bolt can not fit closely to the bolt hole or the bolt head