论文部分内容阅读
薄壁轴瓦冲压成形前落料长度的确定是轴瓦生产工艺制订的首要问题。落料长度的大小也是影响着轴瓦质量的一个重要因素,关系着外圆贴合度;轴瓦瓦口部分钢背的增厚量（即成品轴瓦内圆合金层厚度的大小）;也关系着轴瓦在自由状态下弹张量的大小。轴瓦的品种规格繁多,正确确定落料长度是很重要的。而其落料长度的确定,主要依赖于轴瓦冲压成形中镦冲量的大小。过去生产采用近似计算法,其值经过多次实验修改后确定下来。根据我厂多年来的生产经验,对68个品种规格,外径尺寸在Φ50—150范围,且是冲压成形后外圆不进行机械加工的轴瓦进行了分析研究,对目前广泛应用的20％高钖铝基钢带轴瓦做了初步探讨,找出了规律性,可作为今后生产轴瓦设计工作中的参考。 一、计算法 通过大量的生产数据可知,轴瓦的镦冲量不是一个固定不变的数值,它的变化与轴瓦外径尺寸的大小以及轴瓦壁厚两种因素有关,且遵循着下列方程式:y=t_α·x+K 式中:y─—表示某品种规格轴瓦的镦冲量。（％计） α─—所研究的直线与x轴的夹角 X─—该产品轴瓦的等效厚度 k─—常数值,我厂经验值取1.15 其中:X=X_（1）+jX_（2） X_（1）…钢层厚度 X_（2）…合金层厚度 j…系数。 j值规定如下:巴氏合金j=0 铜基合金j
The determination of blanking length before the stamping of thin-walled bushings is the most important issue in the production process of the bush. The size of blanking length is also an important factor that affects the quality of the bearing bush, which is related to the fit of the outer circle. The thickening of the steel backing (ie, the thickness of the inner alloy layer of the finished bearing bush) The size of the elastic tensor in free state. Bearing a wide variety of specifications, the correct length of blanking is very important. The blanking length of the determination, mainly depends on the stamping forming the amount of upsetting impulse. In the past, the approximate calculation method was adopted for production, and its value was determined after many experiments were revised. According to our factory production experience over the years, 68 varieties of specifications, diameter size in the range of Φ50-150, and is not machined cylindrical outer cylindrical stamping for the analysis of the current widely used 20% high钖 aluminum-based steel bearing made a preliminary study to find the regularity, as the future production of bush design work reference. First, the calculation method Through a large number of production data shows that the amount of upsetting bushings is not a fixed value, and its changes in the size of bushings and bearing bush wall thickness of two factors, and follow the following equation: y = t_α · x + K Where: y ─ ─ said the specifications of a variety of bearing bush upsetting amount. (%) Α ─ ─ the angle between the straight line and the x-axis under study X ─ -the equivalent thickness of the bearing bush k─- constant value, our factory experience value is taken as 1.15 Where: X = X_ (1) + jX_ 2) X_ (1) ... steel thickness X_ (2) ... alloy layer thickness j ... coefficient. j value provisions are as follows: Babbitt j = 0 copper-based alloy j