A Split Drilling Tool Connection Structure for High-Speed ​​Machining

Abstract

The invention relates to a split drilling tool connection structure for high-speed machining, belongs to the technical field of mechanical processing, and relates to a split drilling tool connection structure for high-speed machining. The split drilling tool connection structure has two parts which are a drill tip for cutting and a drill shank for chip removal and clamping. The drill tip is divided into a drilling part and a drill tip connection part, the drill shank is divided into a drill shank connection part and a clamping area, and the drill tip connection part and the drill shank connection part form a quick-change connection area. According to the split drilling tool connection structure, the connection of the drill tip and the drill shank can be realized without damaging a chip groove and a cutting edge, the height of the drill tip and a drill body are ensured to be concentric by using equal cone surfaces, and the mirror images on the two sides of the connection structure are maintained to be symmetric in height, and the stability of a split tool in drilling at high speed is ensured; the connection structure is versatile, one drill shank can be matched with main bodies of drill tips of various types, replacing is simple and convenient, the split drilling tool connection structure is suitable for various machining environments, and the engineering application prospects are good.

Description

technical field [0001] The invention belongs to the technical field of machining, and relates to a split drilling tool connection structure for high-speed machining. Background technique [0002] In order to further improve the economy and service performance of aerospace and other high-end equipment, it is an effective way to develop low-damage and low-cost processing technology in the equipment manufacturing process. As the main processing form, hole making is a huge number in aviation equipment. For example, in order to realize the assembly connection between components on a B747 passenger plane, more than 3 million assembly holes must be processed, and CFRP is often involved in hole making. Processing materials. This will scrap a considerable number of drilling tools, and in the scrapped drilling tools, most of the wear occurs at the drill tip position, and there is not much wear at the drill shank, so this also causes about 90% of the tool Materials are not used effec...

AI Technical Summary

Problems solved by technology

However, this structure requires extremely high machining accuracy, and additional washers and gears also greatly increase the manufacturing cost, and the control bolt is placed on one side, resulting in asymmetrical overall structure, which seriously affects the dynamic balance of the drill bit and limits the drilling speed. Suitable for high-speed drilling of processed materials

At the same time, there is also a replaceable drill bit proposed by Iscar, which is connected by the interference fit between the convex groove of the cutting drill tip and the groove of the drill shank. The groove is positioned in the circumferential direction, but due to the influence of cutting heat during processing, the connection structure will repeatedly expand with heat and contract with cold, reducing the strength of the connection structure

It can be seen that the connection structure of the existing split drilling tool is still unable to meet the processing requirements of processing materials, especially CFRP and CFRP and metal laminates, for high-speed drilling and hole making.

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