A processing method for mounting edge parts
In the installation side processing of aircraft engine receiver parts, fixture positioning and multiple compression, combined with precision turning and milling processing allowance control, as well as the use of different processing methods, the problems of part deformation and machining accuracy are solved, and higher machining accuracy and part rigidity are achieved.
Patent Information
- Application Number
- CN202211366883.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-11-01
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2042-11-01
AI Technical Summary
The installation edge structure of aircraft engine receiver products is complex, and existing processing technology is difficult to effectively control the deformation of parts, resulting in insufficient machining accuracy and rigidity.
The fixture positioning and multiple compressions are used to control the fine-cut margin and milling margin. The gaps, bosses and radial holes are processed through different processing methods (such as horizontal milling, end milling, and spiral milling) to reduce cutting force and reduce part deformation.
It effectively reduces parts deformation, improves machining accuracy and part rigidity, and meets the design requirements of aircraft engine receiver products.
Smart Images
Figure CN115870694B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of parts processing, and in particular provides a processing method for mounting edge parts. Background Art
[0002] The mounting edge structure of some aircraft engine casing products is special, which is quite different from the previous mounting edge structure. In the past, the mounting edge only had simple structures such as profiles and through holes. All profiles can be processed by turning. In addition, the wall thickness of the part is relatively thick, about 4mm, the rigidity of the part is good, and the deformation during processing is small. At the same time, the design of the part requires low dimensional accuracy. The cone mounting structure is relatively complex. In addition to the normal profile, there are 2 deep grooves in the middle, 15 notches on the inner and outer layers, and 15 bosses on the middle and inner layers. The blank is a forging, so a large amount of material needs to be removed by turning to form the part profile. At the same time, a large amount of milling is required to form bosses, notches, and radial holes. The wall thickness of the part is relatively thin, only 2mm, resulting in poor rigidity of the part and large deformation during processing.
[0003] People are eager to obtain a processing method for mounting edge parts with excellent technical effects. Summary of the invention
[0004] The purpose of the present invention is to provide a processing method for mounting edge parts with excellent technical effect.
[0005] The specific steps of the processing method for mounting edge parts are as follows:
[0006] Step 1: Fixture positioning
[0007] The fixture is used to position the bottom surface, press the surface where the inner mouth is located, and assist in supporting the process edge position. The fixture presses the parts to be processed in multiple places; ensure the stability of the parts during turning and milling of the inner and middle bosses, reduce the deformation of the parts, and avoid the outer notches and holes to ensure the stability of the parts during the outer notches and drilling, and reduce the deformation of the parts.
[0008] Step 2: Control the finishing allowance
[0009] The finishing allowance of the installation edge is controlled at 1mm, the deep groove is processed by turning, and the allowance of the middle and inner bosses is ≤2mm; reduce the deformation of the parts caused by milling bosses. The machining allowance should follow the principle of uniform distribution of allowance, and ensure that the machining allowance of each process is uniform as much as possible, while ensuring that the milling allowance is minimized.
[0010] Step 3: Processing notches, bosses and radial holes
[0011] ① Process the notch, perform horizontal milling on the outer notch, and use a milling machine with an elbow to perform horizontal milling on the inner notch; the main forces during cutting are axial force and tangential force, avoiding cutting force along the center direction during vertical milling, thereby reducing part deformation.
[0012] ② Boss processing: perform end milling on the middle boss and the inner boss, and use axial and radial layered milling methods to remove the middle and inner boss excess in step 2; the layered milling method reduces the cutting force during the cutting process, thereby reducing the deformation of the parts.
[0013] ③ Radial hole processing: the middle radial hole is processed by a horizontal milling machine, and the inner radial hole is processed by a vertical milling machine with an elbow. Both the middle and inner radial holes are processed by spiral milling. Spiral milling is a discontinuous milling process, which is conducive to the heat dissipation of the tool. At the same time, it can transform and reduce the cutting force along the center direction during drilling. It is particularly suitable for the processing of thin-walled parts, thereby reducing the deformation of the parts. Controlling milling deformation is a very important part for the installation edge. Advanced processing methods, especially milling for thin-walled parts, are very effective in controlling part deformation. Therefore, different processing methods and methods are required for the notches, bosses and radial holes on the installation edge.
[0014] Step 4: Turn the parts with installation edges left in step 2 to ensure that the parts meet the design drawing dimensions after processing.
[0015] The processing method for mounting edge parts analyzes the part structure, finds the risk points and difficulties in part processing, specifies reasonable clamping solutions, process solutions and numerical control solutions, solves the problem of part deformation during processing, and forms a processing solution for mounting edge parts.
[0016] The processing method for mounting edge parts can be widely promoted in aircraft engine casing products, and has broad application prospects in the field of aircraft engine manufacturing technology. Mastering the processing technology for thin-wall mounting edge and the milling deformation control technology can be promoted in the processing of thin-wall casing parts to meet the future development requirements of casing parts. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:
[0018] Figure 1 This is a schematic diagram of the finishing allowance in step 2. DETAILED DESCRIPTION
[0019] Example 1
[0020] Step 1: Fixture positioning
[0021] The fixture is used to position the bottom surface, press the surface where the inner mouth is located, and assist in supporting the process edge position. The fixture presses the parts to be processed in multiple places; ensure the stability of the parts during turning and milling of the inner and middle bosses, reduce the deformation of the parts, and avoid the outer notches and holes to ensure the stability of the parts during the outer notches and drilling, and reduce the deformation of the parts.
[0022] Step 2: Control the finishing allowance
[0023] The finishing allowance of the installation edge is controlled at 1mm, the deep groove is processed by turning, and the allowance of the middle and inner bosses is ≤2mm; reduce the deformation of the parts caused by milling bosses. The machining allowance should follow the principle of uniform distribution of allowance, and ensure that the machining allowance of each process is uniform as much as possible, while ensuring that the milling allowance is minimized.
[0024] Step 3: Processing notches, bosses and radial holes
[0025] ① Process the notch, perform horizontal milling on the outer notch, and use a milling machine with an elbow to perform horizontal milling on the inner notch; the main forces during cutting are axial force and tangential force, avoiding cutting force along the center direction during vertical milling, thereby reducing part deformation.
[0026] ② Boss processing: perform end milling on the middle boss and the inner boss, and use axial and radial layered milling methods to remove the middle and inner boss excess in step 2; the layered milling method reduces the cutting force during the cutting process, thereby reducing the deformation of the parts.
[0027] ③ Radial hole processing: the middle-layer radial holes are processed by a horizontal milling machine, and the inner-layer radial holes are processed by a vertical milling machine with an elbow. Both the middle-layer radial holes and the inner-layer radial holes are processed by spiral milling. Spiral milling is an intermittent milling process, which is beneficial to the heat dissipation of the tool. At the same time, it can transform and reduce the cutting force along the center direction during drilling, which is particularly suitable for the processing of thin-walled parts, thereby reducing the deformation of parts.
[0028] Controlling milling deformation is a very important part of the mounting edge. Advanced processing methods, especially milling for thin-walled parts, are very effective in controlling part deformation. Therefore, different processing methods and approaches are required for the notches, bosses and radial holes on the mounting edge.
[0029] Step 4: Turn the parts with installation edges left in step 2 to ensure that the parts meet the design drawing dimensions after processing.
Claims
1. A method for processing mounting edge parts, characterized in that: The specific steps of the processing method for mounting edge parts are as follows: Step 1: Fixture positioning The fixture is used to locate the bottom surface, press the surface where the inner mouth is located, and assist in supporting the position of the process edge. The fixture presses the parts to be processed at multiple locations; Step 2: Control the finishing allowance The finishing allowance of the mounting edge is controlled within 1mm, the deep groove is processed by turning, and the allowance of the middle and inner bosses is ≤2mm; reduce the deformation of parts caused by milling bosses; Step 3: Processing notches, bosses and radial holes ① Process the notch, horizontal milling is performed on the outer notch, and horizontal milling is performed on the inner notch using a milling machine with an elbow; ② Boss processing: the middle boss and the inner boss are processed by end milling, and the axial and radial layered milling methods are used to remove the middle and inner boss margins in step 2; ③ Radial hole processing: the middle layer radial holes are processed by horizontal milling machine, and the inner layer radial holes are processed by vertical milling machine with elbow. Both the middle layer radial holes and the inner layer radial holes are processed by spiral milling; Step 4: Turn the parts with installation edges in step 2 to ensure that the parts meet the design drawing dimensions after processing.
Citation Information
Patent Citations
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