小型固体推进剂胶体棒料切断系统设计与研究

Design and research of cutting system for small-scaled solid propellant colloidal bar

固体推进剂整形是确保最终产品质量的关键工艺环节。针对小型固体推进剂细长胶体棒料人工整形过程中尺寸精度难保证、端面形变大和生产安全等问题,研制了一套能远距离操控且安全隔爆的固体推进剂胶体棒料自动整形系统(小型固体推进剂胶体棒料切断系统)。在分析胶体棒料力学特性以及摩擦感度、冲击感度和静电感度特性的基础上,首先完成了旋转进给机构、切断子系统、送料子系统、夹紧机构以及称重与测距机构的设计;其次,经过对关键部件静力学仿真分析,验证了切割刀架及刀具的强度;再者,设计了控制系统,系统采用S7-1200 PLC作为下位机,工控机作为上位机,二者通过OPC(OLE for Process Control,OPC)技术实现数据交换,上位机运行LabVIEW虚拟仪器开发的监控程序,实现数据的存取和指令的收发,同时系统采用网络摄像机对设备运行状态进行实时监测,应用总线式传感器对切断后的胶体棒料进行长度和重量检测;最后,经过固体推进剂胶体棒料现场切断整形实验,验证了胶体棒料切割长度、端面形变程度、端面表面粗糙度及称重精度等指标均满足技术要求,实现了对小型固体推进剂胶体棒料的自动化整形。

Solid propellant reshaping is the key process link to ensure the quality of the final product.In order to solve the problems of dimension accuracy,large tail end deformation and production safety in the manual shaping process of small-scaled solid propellant slender colloidal bar,a set of automatic reshaping system of solid propellant colloidal bar(small-scaled solid propellant colloidal bar cutting system)which can be remotely controlled and safely flameproof was developed.Firstly,on the basis of analyzing the mechanical characteristics of colloidal bar and the characteristics of friction sensitivity,impact sensitivity and static electricity sensitivity,the design of rotary feed mechanism,cutting subsystem,feeding subsystem,clamping mechanism,weighing and length measuring mechanism was completed;secondly,through the static simulation analysis of key components,the strength of cutting tool holder and cutter tool were verified;moreover,the control system was designed using S7-1200 PLC as the lower computer and the industrial control computer as the upper computer,the data exchange was realized through OLE for Process Control(OPC)technology,the upper computer runs the monitoring program developed by LabVIEW virtual instrument to realize data access and command receiving and sending,at the same time,the system uses a network camera to monitor the equipment operation status in real time,and uses a bus sensor to detect the length and weight of the cut colloidal bar;finally,through the cutting reshaping experiment of the solid propellant colloidal bar,it is verified that the cutting length,end deformation degree,end roughness and weighing accuracy of the colloidal bar meet the technical requirements,and the automatic reshaping of the small-scaled solid propellant colloidal bar is realized.