Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of Electromagnetic Coupling to Regulate Residual Stress of Aluminum Alloy Engine Bearing Frame

An electromagnetic coupling and residual stress technology, applied in the field of engine parts processing, can solve the problems of poor control effect and long time consumption, and achieve the effects of low cost, improved service life and avoidance of deformation.

Active Publication Date: 2022-02-01
SICHUAN UNIV +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned problems in the prior art, the present invention provides a method for adjusting and controlling the residual stress of the bearing frame of an aluminum alloy engine by electromagnetic coupling, which solves the problem that the method for adjusting and controlling the residual stress of the bearing frame of an aluminum alloy engine in the prior art is time-consuming and difficult to control. The problem of poor performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of Electromagnetic Coupling to Regulate Residual Stress of Aluminum Alloy Engine Bearing Frame
  • Method of Electromagnetic Coupling to Regulate Residual Stress of Aluminum Alloy Engine Bearing Frame
  • Method of Electromagnetic Coupling to Regulate Residual Stress of Aluminum Alloy Engine Bearing Frame

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Provided is a method for electromagnetic coupling regulating and controlling the residual stress of an aluminum alloy engine load-bearing frame, comprising:

[0036] S1 , according to the shape of the load-bearing frame 3 and the contact area of ​​the electrode contact head, the dynamic processing trajectory of the electrode relative to the load-bearing frame 3 is designed, so that the dynamic processing trajectory completely covers the entire load-bearing frame 3 .

[0037] like figure 1 and figure 2 It is shown that a part of the load-bearing frame 3 is a fan-shaped structure. The specific design method of the dynamic processing track 4 is to divide the load-bearing frame 3 into several processing units 31 in the axial or circumferential direction, and the width of each processing unit 31 is equal to The width of the electrode contact head 21 in the corresponding direction, and the dynamic processing track 4 includes processing lines 41 extending along the bisector ...

Embodiment 2

[0056] The 7050 aluminum alloy engine load-bearing frame is used as the residual stress control to be adjusted.

[0057] Four-time electromagnetic coupling processing parameters in Example 2 of Table 1

[0058]

[0059]

[0060] In this embodiment, the optimization of the electromagnetic processing parameters is that the magnetic field strength and current strength are enhanced, the movement speed is slowed down, and ΔB=0.3T, ΔA=1.5A / mm 2 , ΔV=0.5mm / s, the purpose is to study the effect of weak electromagnetic treatment on residual stress regulation from the boundary of electromagnetic parameters.

[0061] After each electromagnetic coupling treatment, the residual stress of the aluminum alloy engine load-bearing frame is evaluated. Before each treatment, 8 positions are sampled on the load-bearing frame 3 for marking, and the marked 8 positions are subjected to residual stress before and after the electromagnetic coupling treatment. Stress testing, the obtained data ar...

Embodiment example 2

[0062] Table 2 Residual stress evaluation before and after electromagnetic coupling treatment in implementation case 2

[0063]

[0064] The following conclusions can be drawn from the analysis of the above data:

[0065] 1. Weak electromagnetic coupling treatment can effectively control the residual stress introduced in the cutting process, and the control range is 10%-40%;

[0066] 2. Whether it is residual compressive stress or residual tensile stress, the main function of electromagnetic coupling treatment is to reduce residual stress;

[0067] 3. As the magnetic field intensity (0.5-1.4T) and current intensity (0.5-5.0A / mm2) increase, it is beneficial to control the residual stress, that is, the residual stress control effect is enhanced.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an electromagnetic coupling method for adjusting and controlling the residual stress of an aluminum alloy engine load-bearing frame, which relates to the technical field of engine parts processing, and includes four stages of blanking, rough machining, semi-finishing and finishing of the load-bearing frame using different methods. The electromagnetic parameters of the dynamic electromagnetic coupling process are carried out, and the stress and strain generated by the coupling of the pulsed electric field and the pulsed magnetic field and the electromagnetic field provide energy for the electronic transition to rearrange, slow down or reduce the lattice distortion, and finally realize the four stages. The effective control of the residual stress caused by material forming and processing can reduce the residual tensile stress and residual compressive stress at the same time, and improve the yield and service life of the load-bearing frame; at the same time, it relies on the dynamic movement of the load-bearing frame to prevent the temperature in the center area of ​​electromagnetic processing from being too high The transformation of the internal structure caused by it avoids affecting the mechanical properties of the material itself.

Description

technical field [0001] The invention relates to the technical field of engine parts processing, in particular to a method for electromagnetic coupling regulating the residual stress of an aluminum alloy engine load-bearing frame. Background technique [0002] The engine load-bearing frame is the main load-bearing component of the aero-engine. It needs to bear the loads of aerodynamics, temperature, inertial force and external vibration of the rotor at the same time. It has the characteristics of complex structure and important functions. The aluminum alloy engine bearing frame will introduce unevenly distributed residual compressive stress and residual tensile stress during the cutting process, especially in the process of roughing and semi-finishing, resulting in low yield and short service life of the aluminum alloy engine bearing frame. . Controlling the residual stress of the aluminum alloy engine load-bearing frame has become a key step in the domestic production of qu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22F3/00
CPCC22F3/00
Inventor 黄坤兰杨霄钟福王杰曾波
Owner SICHUAN UNIV