针对战时利用激光选区熔化技术直接制备炮闩原件存在制造时间较长的问题，提出一种基于激光选区熔化技术的炮闩击发推杆应急构型设计方法。采用有限元仿真技术和冲击试验，研究点阵结构的抗冲击性能以及点阵结构应用于应急构型设计的可行性。通过静力学仿真方法设计分体式击发推杆应急构型，设计力学性能试验校验其力学性能和服役性能是否满足使用要求。研究结果表明:体心立方(Body-Centered Cubic，BCC)、加Z向杆的体心立方(Body-Centered Cubic with Z-rod，BCC_Z)、面心立方(Face-Centred Cubic，F2 CC)、加Z向杆的面心立方(Face-Centered Cubic with Z-rod，F2 CC_Z)4种点阵结构中，BCC_Z综合性能更优异，抗冲击性能较好;与原击发推杆相比，应急构型击发推杆制造时间减少21。56％，体积缩减25。65％，最大冲击载荷降低32。14％，完成100次反复开关闩实装测试实验后应急构型击发推杆表面无明显磨损，具有良好的服役性能，能够满足使用要求，验证了用于战场抢修需求的应急构型击发推杆设计方法的有效性。
Emergency Configuration Design of Breechblock Firing Mechanism Based on Selective Laser Melting Technology
It takes a long time to manufacture the breechblock firing pushrods by using the selective laser melting technology in wartime. An emergency configuration design method of breechblock firing pushrod based on the selective laser melting technology is proposed. The impact resistance of lattice structure and the feasibility of applying it to emergency configuration design are studied by finite element simulation and impact test. An emergency configuration of split firing pushrod is designed by using a static simulation method,and a mechanical performance test is designed to verify whether its mechanical properties and service performance meet the requirements. The results show that,among the four lattice structures of body-centered cubic (BCC),body-centered cubic with Z-rod (BCC_Z),face-centered cubic (F2CC) and face-centeredcubic with Z-rod ( F2 CC_Z),BCC_Z has better comprehensive performance and better impact resistance. Compared with the original firing pushrod,the manufacturing time of the emergency configuration firing pushrod is reduced by 21.56％,its volume is reduced by 25.65％,and the maximum impact load is reduced by 32.14％. After 100 times of repeated switch latch test experiments,there is no obvious wear on the surface of the emergency configuration firing pushrod,which has good service performance and meets the requirements of use. The effectiveness of the design method of the emergency configuration firing pushrod for battlefield repair is verified.
万方数据
维普
