前言冷镦螺钉除了用冷镦自动机以外,亦可在冲床上进行。但冲床需安装下顶料装置和毛坯的自动送进装置。目前国内用作冷镦螺钉的冲床,大部分是双柱式曲轴冲床,单柱式曲轴冲床用的不广,见的还不多。 1965年我所与无锡标准件厂考虑在一台当时未用于生产的“J11—100”单柱式曲轴冲床上进行冷镦螺钉的工艺试验(暂不考虑毛坯的自动送进机构),以使该机床发挥应有作用。但该机床外形结构紧凑,安装常用的凸轮杠杆式顶料装置比较困难,经分析研究,决定采用适用于该机床外形结构的自动 Foreword Cold heading screws in addition to cold heading machine, but also in the press. However, the punch press to be installed under the device and the rough feeding device. Currently used as a cold heading machine punch, most of the double-column crankshaft punch, single column crankshaft punch is not widely used, see not much. In 1965, we and Wuxi Standard Parts Factory considered the cold forging screw process test on the “J11-100” single-column crankshaft press which was not used in production at that time (not considering the automatic feeding mechanism of the blank) So that the machine play its due role. However, the machine is compact in shape and shape, and it is difficult to install the commonly used cam lever-type ejector device. After analyzing and researching, it is decided to adopt the automatic