Digital control machine tools, referred to as CNC machine tools (NC, Numerical Control), are mechatronics products that have been comprehensively applied to mechanical, electrical, hydraulic, pneumati

1引言 　　桥式起重机是桥架在高架轨道上运行的一种桥架型起重机，俗称天车，广泛地应用在室内外仓库、厂房、码头和露天贮料场等处。普通桥式起重机一般由起重小车、桥架运行机构、桥架金属结构组成。起重小车又由起升机构、小车运行机构和小车架三部分组成，参见图1。起重机电动运行机构的驱动方式可分为两大类：一类为集中驱动，即用一台电动机带动长传动轴驱动两边的主动车轮；另一类为独立驱动，即两边的主动车轮各用一台电

１IntroductionThe injection molding process is generally divided into the following steps: clamping → injection and holding pressure→ melt glue feeding → cooling and setting→ mold opening thimble.The c

1. IntroductionThe automobile industry is developing rapidly, and the demand for automobile tires is also growing rapidly.At the same time, the rapid development of high-grade roads in our country has

In recent years, the technical level of mechatronics of textile machinery has been continuously improved, and AC frequency conversion speed regulation has become a trend.Almost without exception, most