Combined chambering cutter

Abstract

The invention provides a combined chambering cutter for chambering a long row of hinge holes with a large length-diameter ratio. The combined chambering cutter comprises four parts, i.e. a cutter head part I, a guide bush II, an extension rod III and a connecting rod IV, wherein the cutter head part I comprises a front guider, a cutter edge part, a thread connection rod, a spanner position and a cone positioning surface, the extension rod III comprises a cone positioning hole, a thread connection hole, a spanner position, a thread connection rod and a cone positioning surface, and the connecting rod IV comprises a cone positioning hole, a thread connection hole, a spanner position and a locking clamping connection part fixed on an automatic drilling-riveting machine; the guide bush II is sleeved at the extension rod III and is in fine clearance fit with the extension rod III. By adopting the combined chambering cutter, while the dimensional accuracy, the coaxiality requirement and the surface roughness requirement of the holes are ensured, the service life of the cutter is effectively prolonged, and the cost is reduced.

Description

technical field [0001] The invention relates to a combined hole reaming tool, in particular to a combined hole reaming tool for reaming long rows of hinge holes with a large length-to-diameter ratio, and belongs to the technical field of tools. Background technique [0002] During the assembly and processing of aircraft products, the processing of hinge holes is often encountered, especially the hinge holes with a large aspect ratio (the ratio of the length of the processed hole to the diameter). As the new aircraft has higher and higher requirements for the processing dimensional accuracy of the hinge hole, the coaxiality of the hole and the surface quality, and the processing length of the hole is also increasing, that is, several parts will be combined for finishing during assembly. Therefore, when the aircraft structure is complex and the space position is limited, the tool can only be fed from one side, and the length of the tool is doubled. axis requirements. In...

AI Technical Summary

Problems solved by technology

As the new aircraft has higher and higher requirements for the processing dimensional accuracy of the hinge hole, the coaxiality of the hole and the surface quality, and the processing length of the hole is also increasing, that is, several parts will be combined for finishing during assembly. Therefore, when the aircraft structure is complex and the space position is limited, the tool can only be fed from one side, and the length of the tool is doubled. Shaft requirements

In addition, when the hole spacing is small, the traditional method of reaming is to use a set of fixed tools of different lengths for processing, and the too long tools not only have many technical difficulties in the process of cold and hot processing and testing , and due to the use of integral tools, when the tool wears out, the whole tool needs to be scrapped, resulting in high tool costs and large economic losses

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