Finish machining method for assembled rear fuselage of airplane

A technology for the rear fuselage and aircraft, which is applied in the field of finishing after the rear fuselage of the aircraft is assembled. Effect

Pending Publication Date: 2021-02-26
沈阳沈飞国际商用飞机有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The overall rigidity of the aircraft product after assembly is relatively poor, and the material of the joint is titanium alloy (Ti-6AL-4V), which is a difficult-to-machine material; if the method of cutting at a constant speed is used, large vibration will be generated during the cutting process , leading to joint surface quality and dimensional accuracy can not meet the requirements

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
  • Finish machining method for assembled rear fuselage of airplane
  • Finish machining method for assembled rear fuselage of airplane
  • Finish machining method for assembled rear fuselage of airplane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention is described in detail below in conjunction with accompanying drawing and embodiment:

[0020] A method for finishing after the rear fuselage of an aircraft is assembled, the steps are as follows:

[0021] First, according to the structure and processing volume of the processed parts, determine the processing flow and tool structure; then use different speeds (including uniform speed and sinusoidal speed) to cut the test piece, and compare the shape accuracy, Surface roughness, machining vibration, tool wear, machining efficiency and other indicators, determine the use of sinusoidal speed for cutting processing; then determine the relevant parameters corresponding to the sinusoidal speed under different processing procedures, including initial speed, amplitude, cycle and angle increment; Finally, the NC program is generated according to the above-mentioned determined processing methods and processing parameters, and the operation of the processing ...

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 belongs to the technical field of airplane assembly, and relates to a finish machining method for the assembled rear fuselage of an airplane. The finish machining method comprises the following steps that S1, a cutting process flow is determined, a cutting machining mode of a combined milling cutter is adopted, each cutter is composed of a cutter shaft and four cutter heads, and themilling process is divided into three procedures of rough machining, semi-finish machining and finish machining. S2, a cutting tool is selected; S3, the cutting machining mode is determined, the cutting machining mode is that the rotating speed is in a sinusoidal fluctuation mode, and the target function of the rotating speed is S=S1+A*SIN phi; and S4, an NC program is generated, machining equipment is controlled to operate, and cutting machining of a connector is completed. According to the finish machining method for the assembled rear fuselage of the airplane, the problem that after the airplane is assembled, large vibration is generated in the cutting machining process of the airplane is solved, vibration generated in the cutting machining process is effectively eliminated, and the surface quality and the size precision of the cut connector both meet the requirements.

Description

technical field [0001] The invention belongs to the technical field of aircraft assembly, and relates to a method for finishing the rear fuselage of an aircraft after the assembly is completed. Background technique [0002] After the assembly of the rear fuselage of the aircraft product is completed, the joints connected to the vertical tail need to be finished to meet the assembly tolerance requirements. The overall rigidity of the aircraft product after assembly is relatively poor, and the material of the joint is titanium alloy (Ti-6AL-4V), which is a difficult-to-machine material; if the method of cutting at a constant speed is used, large vibration will be generated during the cutting process , As a result, the surface quality and dimensional accuracy of the joints cannot meet the requirements. In order to eliminate the vibration generated during the cutting process, the cutting process with sinusoidal speed is adopted to effectively eliminate the vibration generated d...

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
IPC IPC(8): B23C3/00
CPCB23C3/00Y02P90/02
Inventor 金加奇杨思奇赵清洲
Owner 沈阳沈飞国际商用飞机有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap