A Milling Technology of ld5-cs Free Forging Closed Angle Deep Cavity Structural Parts

Abstract

The invention relates to a milling process of free forging aluminum alloy parts, belongs to the field of aviation precision manufacturing and processing, and specifically relates to a milling process of LD5‑CS free forging closed angle deep cavity structural parts. A milling process for LD5‑CS free forging closed angle deep cavity structural parts, including the following steps: (1) blanking; (2) milling cube; (3) drilling and reaming process holes; (4) rough machining; (5) heat treatment; (6) expanding and reaming process holes; (7) clamping; (8) fine milling end and open slope; (9) fine milling groove cavity; (10) fine milling groove cavity side wall; (11) Inserting and milling corners and connecting bottom angles; (12) Other machining processes; (13) Measurement and inspection parts. The invention has the following advantages: 1. The processing efficiency of such parts is greatly improved, and the service life of the tool is effectively prolonged. 2. It can effectively improve the qualified rate of parts and meet the delivery of actual production nodes. 3. The processing technology plan of this part can be used as a reference and reference, and it can be popularized and used on other parts with similar structures.

Description

Technical field[0001]The present invention relates to a milling process process of freely forged aluminum alloy parts, which belongs to the field of aviation precision manufacturing, and is specifically involved in a milling processing process of a deep cavity structural part of LD5-CS freely forging corner cavity.Background technique[0002]The LD5-CS freely forged aluminum alloy is a very important machining material and is widely used in the aerospace manufacturing and processing.[0003]Closed deep cavity is a typical five-axis parts processing characteristics. The structure of this type of part is complex and more deep, and the difficulty of processing is large, which has been difficult to work in the field of machining. This type of parts are mainly reflected in the following two aspects: On the one hand, the part contains closed corner structure, which determines that the machining process requires a certain angle to face the part to meet the size and accuracy requirements; This ...

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Problems solved by technology

The difficulty of machining such parts is mainly reflected in the following two aspects: On the one hand, the parts contain a closed-angle structure, which determines that the five-axis machine tool needs to be swung to a certain angle to cut the parts during the processing process to meet the size and accuracy requirements; at the same time This type of parts also has deep cavity structure, often the depth of these grooves is generally between 80~120mm, the corner of each groove is generally R5 or R6, and the bottom angle of the groove is generally R3. When selecting the tool for the cavity, the rigidity and dynamic balance of the tool should be considered. The appropriate tool length-to-diameter ratio should be used, and the lengthened tool holder should be used reasonably for clamping to ensure the surface processing quality of the part. However, because the tool holder is too long, the overall rigidity of the tool is insufficient. The cutting parameters of the machine tool must be reduced accordingly, resulting in extremely low cutting efficiency of parts and long processing time; on the other hand, compared with the traditional aluminum alloy forging processing technology, due to the characteristics of the part material itself during the processing process, the stress cannot be obtained. Effective release will cause large deformation of the part structure and expansion of the cavity, resulting in unguaranteed wall thickness and dimensions, which cannot meet the design requirements; therefore, the traditional processing method of aluminum alloy forgings is no longer suitable for processing such parts

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