微通道挤注药剂配方与装药工艺研究

Study on the Extrusion-cast Booster and Charging Process for the Small Grooved Channel

针对起爆逻辑网络,探索采用奥克托今(HMX)基塑性粘结炸药作挤注型传爆药,运用分段挤压注入沟槽的工艺方式对直线微通道装药。通过正交试验研究了HMX粒度、Viton A含量、增塑剂种类及用量对装药与传爆性能的影响。结果表明,实验塑性炸药挤注工艺用于小尺寸传爆沟槽装药可行,装药致密、均匀;细化HMX含量为97%的传爆药不适于挤注装药;粘结剂低于3%时,挤注药体成型变差;增塑剂用C2与C3的塑性炸药表面更平滑,柔韧性更强;达到可传爆密度的前提下,HMX中小粒度颗粒维持相当含量是沟槽传爆药可靠传爆的必要条件;E级HMX 47.5%、细化HMX 47.5%、Viton A 5%、增塑剂C32%(外加)为最优挤注型传爆药装药配方,装药平均密度1.44 g/cm3,1 mm×1 mm沟槽内平均爆速达6 959 m/s,直线传爆临界直径0.5 mm。

For the logic initiation network, the HMX-based plastic explosive was made as an extrusion- cast booster and filled up into linear channel in the way of repeated sections. The charge and explosion performances were studied from the particle size of HMX, the content of Viton A, and the sorts of plasti- cizer through the orthogonal test. The test results show that the extrusion-cast process in the experiment is fit for charge for the small grooved channel. The charge is compact and uniform. 97 percent of fine HMX is not fit for the charge. The shaping of extrusion-cast booster becomes bad in the case of binder being lower than 3 percent. The plasticization effects of plasticizers C2 and C3 are better. Under the premise of high enough HMX density, fine HMX being at a certain proportion of the whole HMX is the key to relia- ble booster. The extrusion-cast booster composing of 47.5 percent of E HMX, 47.5 percent of fine HMX, 5 percent of Viton A and 2 percent of plasticizer C3 is the best formula. The charge density is 1.44 g/cm3. The average detonation velocity is 6 959 m/s in the grooved channel which is 1 mm x 1 mm of section size. The linear critical diameter is 0.5 mm.