定扭矩螺栓自动调定装置的研究
发布时间：2018-11-19 09:44
【摘要】：螺纹联接是目前机械工业中应用最为广泛的联接方式,因其具有一系列的优点：螺纹调整时能产生很大的轴向力；能方便地实现自锁；外形尺寸小；制造简单,能保持较高的精度；通过标准化可以大批量生产,因而成本低,且具有互换性。 为了增加螺纹联接的刚性、紧密性、防松能力以及防止受横向载荷螺栓联接的滑动,多数螺纹联接在装配时都要预紧。一般通过调整力矩来控制螺栓的预紧力,但是这种方法误差较大,不能实现精确控制。随着科学技术的发展,对螺栓预紧力的控制要求也越来越高,由此产生了许多新型螺栓,定扭矩螺栓就是其中一种,它具有松动监视功能,可以实现对额定扭矩的精确控制。 本文主要设计了一套定扭矩螺栓自动调定装置,通过它对定扭矩螺栓进行安装,并且能够精确控制螺栓的预紧力,保证相对误差在5%以内。本文主要包括以下内容：(1)确定定扭矩螺栓调定装置各个部分包括螺栓拉伸部分、驱动部分、控制部分以及调整机构的方案,并据此确定总体方案。(2)对定扭矩螺栓调定装置的各个部分进行计算选型,并确定各部分的结构,最终给出总体结构。(3)设计出控制和驱动部分的电路图,并利用编程软件STEP 7 Micro-WIN32编写出相应的控制程序。(4)利用AMESim以及MATLAB对影响定扭矩螺栓自动调定装置的控制精度的各个因素进行仿真分析,并采取相应措施使得相对误差不超过5%。
[Abstract]:Thread connection is the most widely used connection mode in mechanical industry at present, because it has a series of advantages: thread adjustment can produce great axial force; Simple manufacturing, high precision, mass production through standardization, low cost and interchangeability. In order to increase the rigidity, compactness, anti-loosening ability of thread connection and prevent sliding of bolt connection under transverse load, most thread joints should be preloaded during assembly. Generally, the pretightening force of bolts is controlled by adjusting the torque, but the error of this method is too large to achieve accurate control. With the development of science and technology, the control requirements of bolt pre-tightening force are becoming higher and higher. Many new bolts have been produced, one of which is fixed torque bolt, which has the function of loosening and monitoring and can realize accurate control of rated torque. In this paper, a set of automatic adjusting device of fixed torque bolt is designed, through which the fixed torque bolt can be installed, and the pretightening force of bolt can be controlled accurately, and the relative error is less than 5%. The main contents of this paper are as follows: (1) each part of the fixed torque bolt adjusting device includes the bolt stretching part, the driving part, the control part and the scheme of the adjusting mechanism. Based on this, the overall scheme is determined. (2) the calculation and selection of each part of the fixed torque bolt setting device is carried out, and the structure of each part is determined, finally the overall structure is given. (3) the circuit diagram of the control and drive parts is designed. The corresponding control program is compiled by programming software STEP 7 Micro-WIN32. (4) using AMESim and MATLAB, the factors that affect the control precision of the automatic setting device of fixed torque bolt are simulated and analyzed. The relative error is not more than 5.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH131.3
本文编号：2341911
[Abstract]:Thread connection is the most widely used connection mode in mechanical industry at present, because it has a series of advantages: thread adjustment can produce great axial force; Simple manufacturing, high precision, mass production through standardization, low cost and interchangeability. In order to increase the rigidity, compactness, anti-loosening ability of thread connection and prevent sliding of bolt connection under transverse load, most thread joints should be preloaded during assembly. Generally, the pretightening force of bolts is controlled by adjusting the torque, but the error of this method is too large to achieve accurate control. With the development of science and technology, the control requirements of bolt pre-tightening force are becoming higher and higher. Many new bolts have been produced, one of which is fixed torque bolt, which has the function of loosening and monitoring and can realize accurate control of rated torque. In this paper, a set of automatic adjusting device of fixed torque bolt is designed, through which the fixed torque bolt can be installed, and the pretightening force of bolt can be controlled accurately, and the relative error is less than 5%. The main contents of this paper are as follows: (1) each part of the fixed torque bolt adjusting device includes the bolt stretching part, the driving part, the control part and the scheme of the adjusting mechanism. Based on this, the overall scheme is determined. (2) the calculation and selection of each part of the fixed torque bolt setting device is carried out, and the structure of each part is determined, finally the overall structure is given. (3) the circuit diagram of the control and drive parts is designed. The corresponding control program is compiled by programming software STEP 7 Micro-WIN32. (4) using AMESim and MATLAB, the factors that affect the control precision of the automatic setting device of fixed torque bolt are simulated and analyzed. The relative error is not more than 5.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH131.3
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