论文部分内容阅读
根据多连杆压力机的行程曲线特点,提出了以80%公称力作为公称力控制线,并据此绘制压力机载荷许用区间图,即将力-行程曲线划分为安全区、临界区和危险区。当成形力处于公称力控制线下方,则设备载荷能够满足成形要求;当成形力处于公称力控制线和公称力曲线之间的临界区,需要进一步对变形功进行校核。另一方面,采用数值积分的方法对成形力和作用距离进行积分,得到变形功,与压力机许用变形功进行比较,提出能量校核的前提和校核方法。最后提出了成形力和变形功校核流程图,并用于前门内板等零件的分析。结果表明,采用22500 k N压力机满足前门内板一模双件载荷要求。
According to the characteristics of the stroke curve of multi-link press, a nominal control force of 80% is proposed as the control line of the nominal force and the press load allowable interval map is plotted accordingly. That is, the force-stroke curve is divided into safe zone, critical zone and danger Area. When the forming force is below the nominal force control line, the equipment load can meet the forming requirements. When the forming force is in the critical region between the nominal force control line and the nominal force curve, the deformation work needs to be further checked. On the other hand, numerical integration method is used to integrate the forming force and working distance to obtain the work of deformation, which is compared with the allowable deformation work of the press. The premise and checking method of energy checking are put forward. In the end, flowcharts of forming force and deformation work are put forward and used for the analysis of the front inner panel and other components. The results showed that the 22500 k N press fulfilled the requirements of the load-carrying double-piece front panel.