我厂使用的1000×3000中型板式给矿机,其下部为600×900复摆鄂式破碎机,其上部为400吨粗矿仓。原设计给矿块度为350毫米以下,实际生产达600,甚至达800毫米。并且在实际生产中,往往是将粗矿仓开空,翻车机倒下的矿石直接从7米高处落下,打在铁板上,其冲击负荷为静负荷的几十倍;另外在处理大块矿石卡住矿仓口时的强力推顶作用下,使负荷链板产生弯曲变形(图1)。这样一方面使滚轮磨成了元锥形,缩短了使用寿命,另一方面 I plant the use of 1000 × 3000 plate to the mining machine, the lower part of the 600 × 900 complex pendulum jaw crusher, the upper part of 400 tons crude ore warehouse. The original design to the lumpiness of 350 mm or less, the actual production of 600, or even up to 800 mm. And in actual production, it is often the rough mine emptying, dumping machine fell ore directly from the 7-meter height, hit the iron plate, the impact load of static load of dozens of times; the other in large Block ore blocks the mouth of the ore when the strong thrust, the load chain plate bending (Figure 1). On the one hand so that the grinding wheel into a meta-cone, shortening the life, on the other hand