论文部分内容阅读
如图所示。首先将坯料7放置在凹模1上,压边圈6用预定的压边力将坯料7压紧。然后由液压装置将压力液体经孔13和12,流入压边圈6和坯料7之间,使坯料7在凹模1的模腔3a、3b内鼓起;同时坯料开始拉入凹模内。此时压料板14a、14b用预定的压料力,把容器底部压紧。在这种状态下,凸模5a、5b压入。当压力超过限定压力时,通过11a,11b和溢流阀将液体排出。成形过程中,压料板14a、
as the picture shows. First, the blank 7 is placed on the die 1, and the blank holder 7 is pressed by the blank holder 6 with a predetermined blank holder force. The pressure fluid is then pumped by the hydraulic means through the holes 13 and 12 between the blank holder 6 and the blank 7 to cause the blank 7 to swell in the cavity 3a, 3b of the die 1, while the blank starts to be drawn into the die. At this time, the pressing plates 14a, 14b press the bottom of the container with a predetermined pressing force. In this state, the punches 5a and 5b are press-fitted. When the pressure exceeds the defined pressure, the liquid is drained through 11a, 11b and the pressure relief valve. During the forming process, the pressure plates 14a,