药型罩旋压机自动给料系统设计及压制系统分析

发布时间：2018-10-21 08:07

【摘要】：本研究课题主要探讨石油射孔弹药型罩的加工工艺。在射孔弹穿透套管和水泥环进入地层的过程中,药型罩决定了射孔弹的穿深,因此,研究如何制造出更高质量药型罩是目前石油开采技术的重中之重。影响射孔性能的药型罩诸项因素主要有药型罩形状(锥角),材料和密度、重量和装药量的搭配、致密性等。针对药型罩的重量和致密性这两个因素,本文对原有的送粉机构进行了改进,加入了动态自动称重和PLC控制系统,构成了粉末自动给料系统,对送粉过程做到了精确、实时的控制,以实现每一批次的药型罩重量误差控制在±O.1g以内；对旋压系统进行了改进,提出了提高凸模压力来改善药型罩致密性的方法,并验证其可行性,然后利用有限元分析软件对新的旋压主轴系统的关键零件(主轴和轴承座)进行结构的静力学分析,考察二者的强度是否能满足工艺要求。本文的研究内容主要有以下几点： (1)自动给料系统的机械结构设计,包括送粉与称重部分。机械部分主要介绍了螺旋送粉器的结构和工作原理,螺旋送粉器是一种容积式给料机构,采用单头矩形螺纹,螺杆和螺纹均精密制造,保证送粉量的稳定和精确,全封闭型设计,以保证对环境无影响。称重用电子称采用岛津电子TXB621L型电子称,其量程为2g-620g,平均响应时间通常是2s,精度为±0.1g,完全可以满足称量要求。 (2)自动给料系统的控制系统设计。控制基本原理是基于PID算法的闭环控制,结构上用PLC结合触摸屏技术来实现。对PLC进行了选型,完成了人机界而设计。 (3)主机系统主要零件的ANSYS校核。在对金属粉末压制过程的变形和压制压力与压坯密度的关系进行理论分析之后,对改进的主轴系统关键零件主轴和轴承座进行强度校核。该课题的研究成果已经应用于生产实际,改善了粉末药型罩质量,提高了生产效率和经济效益,同时本研究成果也可以应用于其他要求控制精度较高的粉末冶金产品的生产制造中。
[Abstract]:This research mainly discusses the processing technology of petroleum perforated ammunition cover. In the process of perforating projectile penetrating through casing and cement ring, the penetration depth of perforating projectile is determined by the charge cover. Therefore, it is the most important of the present petroleum production technology to study how to produce a higher quality propellant cover. The main factors affecting perforation performance are shape (cone angle), material and density, weight and charge, compactness and so on. Aiming at the weight and compactness of the powder cover, the original powder feeding mechanism is improved in this paper, and the dynamic automatic weighing system and PLC control system are added to form the powder automatic feeding system, which is accurate for the powder feeding process. In order to control the weight error within 卤0.1 g of each batch, the spinning system is improved, and the method of increasing the punch pressure to improve the compactness of the liner is put forward, and its feasibility is verified. Then the structural statics analysis of the key parts (spindle and bearing seat) of the new spinning spindle system is carried out by using the finite element analysis software to investigate whether the strength of the two parts can meet the requirements of the process. The main contents of this paper are as follows: (1) the mechanical structure design of automatic feeding system, including powder feeding and weighing part. In the mechanical part, the structure and working principle of the screw powder feeder are introduced. The screw powder feeder is a kind of volumetric feeding mechanism, which is made of single head rectangular thread, screw and screw thread, so as to ensure the stability and accuracy of powder feeding. Fully closed design to ensure no impact on the environment. The weighing and reusing electronic weighing adopts the TXB621L type electronic weighing scale of Shimadzu electron, its measuring range is 2g-620g, the average response time is usually 2s, the precision is 卤0.1g. it can completely meet the weighing requirements. (2) the design of the control system of the automatic feeding system. The basic principle of control is closed loop control based on PID algorithm, which is realized by PLC and touch screen technology. The selection of PLC is carried out and the design of man-machine boundary is completed. (3) the ANSYS check of main parts of host system. Based on the theoretical analysis of the relationship between the deformation and pressing pressure of metal powder and the compaction density, the strength of the key parts of the improved spindle system, the spindle and the bearing seat, is checked. The research results of this project have been applied to the production practice, which has improved the quality of powder medicine cover, improved the production efficiency and economic benefit. At the same time, the research results can also be used in the production and manufacture of other PM products with high control precision.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH237.1

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