套管头四通多向模锻成形工艺研究

发布时间：2018-06-29 13:07

本文选题：套管头四通 + 多向模锻　；参考：《燕山大学》2015年硕士论文

【摘要】：在采油(气)生产设备中,套管头是套管和井口装置的重要连接件。套管头四通是套管头的主要部件,要求有较高的力学性能和耐腐蚀性能。套管头四通的成形方法主要有铸造、自由锻造和多向模锻。采用多向模锻工艺成形套管头四通,不仅能直接锻造出内孔,而且还能保证金属流线的完整性,提高构件的机械性能。本文采用数值模拟方法,针对套管头四通的多向模锻成形工艺过程及其模具结构进行研究。针对材质为AISI-410的套管头四通件多向模锻成形工艺,通过实验分析了AISI-410中?-铁素体含量随温度的变化规律,确定了这种材料的始锻温度;通过对套管头四通结构特点的分析,提出了多向模锻水平分模的锻造成形方案。本文应用DEFORM-3D有限元分析软件,对套管头四通件多向模锻水平分模锻造方案进行了热力耦合数值模拟,分析了坯料初始位置等因素对锻件成形质量的影响及其规律,确定了成形时的坯料初始位置,确定了始锻温度1200℃、模具预热300℃、毛坯在右端型腔内长度为245mm、左冲头速度40mm/s和右冲头速度22.2mm/s成形工艺参数。在对套管头四通多向模锻成形工艺过程模拟的基础上,给出了成形模具的组合结构方案,分析了组合结构模具的成形凹模和模座在预热过程中其装配间隙的变化情况,以及模具在不同装配间隙和模芯尺寸时的温度场、接触状态及应力分布情况,确定了成形凹模的主要结构尺寸。
[Abstract]:In the production equipment of oil and gas production (gas) production equipment, the casing head is an important part of the casing and wellhead device. The four connection of the casing head is the main part of the casing head, which requires high mechanical properties and corrosion resistance. The forming methods of the four through casing head are mainly casting, free forging and multi direction forging. The four way of casing head is formed by multi direction forging process, and no Only the inner hole can be forged directly, and the integrity of the metal flow line can be ensured and the mechanical properties of the component can be improved. In this paper, the numerical simulation method is used to study the process and die structure of the multi direction die forging of the four through casing head. The multi direction forging process for the four parts of the casing head with AISI-410 material is divided by the experiment. The initial forging temperature of the AISI-410 - ferrite content with the temperature is analyzed. By analyzing the characteristics of the four pass structure of the casing head, the forging forming scheme of the horizontal die forging of multi direction die forging is put forward. In this paper, the DEFORM-3D finite element analysis software is applied to the horizontal die forging scheme of the multi direction die forging of the casing head. The effect of the initial position of the blank and other factors on the forming quality of the forging is analyzed. The initial position of the blank is determined, the initial forging temperature is 1200, the mold preheating is 300, the length of the blank in the right end cavity is 245mm, the left punch speed 40mm/s and the right punch speed 22.2mm/s forming process. On the basis of the simulation of the forming process of the four pass multi direction die forging process of the casing head, the combined structure scheme of the forming die is given. The change of the assembly gap of the forming die and the die seat in the preheating process, as well as the temperature field, the contact state and the contact state of the die at different assembly clearance and core size are analyzed. The main structural dimensions of the forming die are determined by the stress distribution.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG316.3

【参考文献】