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在机械加工中,若采用气动技术实现送料、夹紧、进刀和退刀等动作的自动化时,必然要使用气缸作执行元件,因此,气缸的运动速度均匀和稳定(实际是气缸活塞杆的运动速度)将直接对加工零件的精度产生很大影响。而气缸的运动速度常应用一种由单向阀和节流阀并联组成的速度控制阀控制,所以就有如何正确使用速度控制阀的问题。我们知道,如图1和图2所示即为速度控制阀常用于控制气缸运动速度的两种连接方法。图1为排气节流连接法,图2为节流供气连接法。两种连接方法控制气缸运动速度的特性与效果不一样,通常推荐图1所示的连接方法,其原因是:在图1所示的情况下,活塞杆处于缩进状
In the machining, if using pneumatic technology to feed, clamp, feed and retract the automation of such actions, it is inevitable to use the cylinder as the actuator, therefore, the cylinder speed uniform and stable (in fact, the cylinder piston rod Movement speed) will have a direct impact on the accuracy of machining parts. The speed of the cylinder often use a speed control valve consisting of a check valve and throttle control in parallel, so there is how to properly use the speed control valve. We know that, as shown in Figure 1 and Figure 2 is the speed control valve commonly used to control the speed of the cylinder two connection methods. Figure 1 exhaust throttle connection method, Figure 2 is throttling gas connection method. The two connection methods to control the speed and speed of the cylinder have different characteristics and effects. The connection method shown in Figure 1 is usually recommended for the following reasons: in the case of Figure 1, the piston rod is indented