Feed rate control method and apparatus in numerical control system
    1.
    发明授权
    Feed rate control method and apparatus in numerical control system 失效
    数控系统中的进给速率控制方法和装置

    公开(公告)号:US5528506A

    公开(公告)日:1996-06-18

    申请号:US510771

    申请日:1995-08-03

    IPC分类号: G05B19/4103 G05B19/416

    摘要: The tolerable maximum feed rate Fd is calculated in real time during operation based on the tolerable minimum moving time Ta to be determined by the data interpretation and the moving distance L of each machining block. If the command feed rate Fc exceeds the tolerable maximum feed rate Fd, the actual feed rate for the block is set to the tolerable maximum feed rate Fd, thereby realizing smooth deceleration and preventing mechanical shock of the machine tool and reduction in machining accuracy. Required time for each processing element is determined in advance, the sum of processing times corresponding each element is calculated by judging the processing mode element contained in machining for each block. Then, the feed rate is controlled by determining the tolerable minimum moving time for each block based on the calculated sum of processing times.

    摘要翻译: 基于由数据解释确定的可容许的最小移动时间Ta和每个加工块的移动距离L,在运行期间实时计算可容许的最大进给速率Fd。 如果指令进给速度Fc超过允许的最大进给速度Fd,则块的实际进给速度被设定为允许的最大进给速度Fd,从而实现平滑的减速并防止机床的机械冲击并降低加工精度。 预先确定每个处理元件的所需时间,通过判断每个块的加工中包含的处理模式元素来计算对应于每个元素的处理时间的总和。 然后,通过基于计算出的处理时间的和来确定每个块的可容许的最小移动时间来控制进给速率。

    Method and apparatus for controlling feed rate at arcuate portions
    2.
    发明授权
    Method and apparatus for controlling feed rate at arcuate portions 失效
    用于控制弓形部分进给速度的方法和装置

    公开(公告)号:US5444636A

    公开(公告)日:1995-08-22

    申请号:US931981

    申请日:1992-08-19

    摘要: A tolerable feed rate is calculated to cause mechanical shock not exceeding a tolerable level in an arcuate machining based on the radius of the path of tool movement at arcuate machining portions and the predetermined tolerable acceleration. A deceleration start timing is set by reference to the end of an arcuate machining and the predetermined deceleration so that the feed rate is lower enough to maintain the tolerable mechanical shock at the end of an arcuate machining. An optimum feed rate is set for arcuate and completely circular machining based on the classification judgment of the arc or complete circle.

    摘要翻译: 根据弓形加工部分的刀具运动路径的半径和预定的可容许加速度,计算可允许的进给速率,使机械冲击在弓形加工中不超过允许的水平。 参考弧形加工的结束和预定的减速度来设定减速开始时刻,使得进给速度足够低以保持在弓形加工结束时允许的机械冲击。 根据电弧或完整圆的分类判断,为弧形和全圆加工设定最佳进给速度。