Modeling the design of a device for controlling the measurement of aircraft engine parts on a 3-D measuring machine
Students Name: Hanushchak Vitalii Mykhailovych
Qualification Level: magister
Speciality: Computer Engineering in Mechanical Engineering
Institute: Institute of Mechanical Engineering and Transport
Mode of Study: full
Academic Year: 2023-2024 н.р.
Language of Defence: ukrainian
Abstract: In the engineering industry, the use of blanks is quite common and at the same time necessary, regardless of whether it is artificial, serial or mass production. The basic definition of drugs can be formulated as auxiliaries that accelerate, facilitate and enable production. The main functions of the fixtures include unambiguous positioning and strong clamping of the component both during machining and during other activities such as assembly and inspection. The simplest clamping means are manual and machine vices, which belong to the oldest devices. They also provide relative positioning and retention of components during assembly. The device is also used when checking the correctness of the dimensions or geometric shapes of the part. Therefore, the development of a device for controlling the measurement of aircraft engine parts on a 3-D measuring machine is an urgent task and is of scientific interest. The object of the research: the load on the structure of the clamped part and the device for controlling the measurement of the part on the 3D measuring machine. The subject of research: the part and the device for controlling the measurement of the part on a 3D measuring machine under static load and stress and deformation that occur during the measurement process. The purpose of the research: designing a device for controlling the measurement of a part on a 3D measuring machine. The first section provides an overview of the measurement details. It is a round part with a diameter of 782 mm, a height of 66 mm and a weight of 12,4 kg. One of the technological manufacturing operations is used to create the necessary flatness of the surface, which serves as a support surface during the next operation and ensures stable fixation and removes elastic deformations caused by clamping the part with a poor-quality support surface. The recommended flatness of this surface is 0,02 mm. Failure 8 to maintain the required flatness will also lead to a greater beating of the surface of the part than would be acceptable. These details are measured on a 3D coordinate measuring machine. Tasks have been set to realize the set goal of the master’s work. In the second section, a design sketch of the device is developed. The constructive layout of the device was carried out. The device is divided into four main parts, which include the mounting base, pinch roller positioning, segment moving roller positioning, and component lifting. First, the base of the device is described, which forms the main supporting structure of the device, and all other parts are attached to it. The principle of positioning is mechanical with the help of pins. A 3D model of the device as a whole and a section of the 3D model with a fixed measurement detail were developed In the third chapter, a model was created in Autodesk Inventor and then simulated using the finite element method to check the strain and stress values. The magnitude of the force in each assembly that replaces the cylinders moving with three mandrels is 3000 N, and for the cylinders moving with only two mandrels it is 1850 N. However, these cylinders are only in two places around the perimeter because there are centering pins . The second force effect is the force of gravity, which was determined by the function of gravity. The maximum deformation was 0,14 mm for the plates on the outside of the device, on which the dovetail guide for the clamping cylinders is fixed. The deformation of the supporting edge was up to 0,0085 mm. The deformation of the surface of the part, which is attached to the base and on which the flatness of the part is measured, is also up to 0,0085 mm. Mandrels in the radius zones showed the greatest stress. This stress reaches a maximum of 280 MPa. This is fine when using 35 steel as the steel has a minimum yield strength of 355 MPa. The fourth chapter provides an economic assessment of the project solution. The term of development and implementation of the project solution will last 89 days, and the costs of its development and implementation will amount to UAH 51971,18. This project solution will have a term of use of 5 years. Annual costs for the operation of 9 the design solution will amount to UAH 43595,0. The project solution will have a consumption price for the developer organization of UAH 166,17 per day and for the buyer organization - UAH 168,05 per day during the entire period of use. The project solutions obtained in the work and corresponding studies indicate their feasibility and practical use. Key words: measuring machine, device, flatness, CAD system, maximum stress, maximum deformation, finite element method