predetermincd counter

This paper described two electric control systems of vertical double - acting hydraulic- press, one with a high - speed counter, and the other with a initialize counter.

介绍了立式双动液压机的电控系统应用高速计数器和多预置计数器的两种方案,通过分 析两种方案的硬件组成、程序的控制思想及其适用性,论证了应用多预置计数器是立式双动液压机的 一种设计改进方案。

A control circuit for presetting,displaying,counting welding temperature cycles and automatically switching;

焊接温度循环次数预置、显示、计数及自动通断电控制电路

The paper introduces a circuit which can make out water quantity signals by eddy flow transform and preset water consumption with a dial switch so as to realize water supply digital control.

用蜗流变换方式将泵站输水管道内流量信号变为电量信号，用ＣＭＯＳ集成电路设计出泵站数控供水电路，需水量用拨盘开关设定（预置），当供水量达到预置水量时发出信号并由驱动电路使泵站机组停机。

Hard alloy powder of 25%Fe+15%Co+60%WC was directly pressed on the surface of substrate of carbon steel by hydraulic press and steel die to form precoated layer,and then laser cladding was conducted by using a high power CO_2 laser.

利用液压机和简易模具直接将硬质合金粉末(25%Fe+15%Co+60%WC)压制在碳钢基体上;采用大功率CO2激光器对预置层进行扫描,在一定工艺参数下得到了表面较为平整、无裂纹、与基体形成良好冶金结合的涂层;利用扫描电镜和显微硬度计对涂层进行成分、形貌和显微硬度分析。

The precoated layer was melted and cladded on substrate surface by using continuious wave CO_2 laser of high power.

利用液压机和简易模具将硬质合金粉末预置在基体上，并采用大功率CO_2激光器进行预置层的熔覆；借助ANSYS的APDL参数语言，模拟激光表面熔覆时的温度场，并在此基础上预测了激光表面熔覆工艺参数范围。