Effects of Tong Shapes on Hydraulic Log Grapple's Performance in Loading and Unloading Operations

Jingxin Wang

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Effects of Tong Shapes on Hydraulic Log Grapple's Performance in Loading and Unloading Operations

机译：钳子形状对液压对数抓斗在装卸作业中的性能的影响

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Three log grapple tong shapes used in logging operations; horizontal ellipse, circle, and vertical ellipse, were analyzed mathematically and mechanically. The three same tongs as defined were designed and tested to evaluate their performance in terms of grabbing unrestrained log piles. Three operational variables; grabbing force, grabbed log weight, and unit grabbing force were examined using five diameter classes of logs for each set of tongs. Results indicated that the grabbing performance of log grapples with horizontal ellipse tongs is better than the grapples with circular tongs or vertical ellipse tongs.

机译：用于伐木操作的三个日志抓斗钳形状;数学和机械地分析横向椭圆，圆形和垂直椭圆形。设计并测试了三种相同的钳子，以评估它们在抓取无拘无束的日志桩方面的性能。三个操作变量;使用每组钳子的五个直径的日志检查抓取力，抓取对数重量和单位抓取力。结果表明，带有水平椭圆钳的原木抓斗的抓取性能优于带有圆形钳或垂直椭圆钳的擒抱。

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《International Journal of Forest Engineering》 |2003年第1期|共8页
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Jingxin Wang;
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Effects of Tong Shapes on Hydraulic Log Grapple's Performance in Loading and Unloading Operations

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