A kind of composite material variable-section dovetail blind groove machining method

Abstract

The invention provides a method for machining a variable cross-section dovetail blind groove of a composite material, and belongs to the technical field of machining. The method includes the steps that a rough machining tool, a semi-finishing tool and an insert block are manufactured; the rough machining tool is used for removing the large allowance to form a rectangular cross-section groove; the semi-finishing tool is used for conducting transverse cutting feed from the outer side of the cross section of the rectangular cross-section groove, the tangent line of the maximal turning circle of the tool is located on the groove bottom face contour line of the variable cross-section dovetail blind groove, the allowances of the blind end face and the two side faces of the rectangular cross-section groove are removed, and accordingly a variable cross-section dovetail blind groove workblank with the allowance being reserved at the blind end included angle position is formed; and the insert block is embedded into the variable cross-section dovetail blind groove workblank, the allowance at the blind end included angle position of the variable cross-section dovetail blind groove is removed and a workpiece with the variable cross-section dovetail blind groove can be obtained. By the adoption of the machining method provided by the invention, overcut of the blind end is avoided; the tool durability is effectively improved, and production cost is reduced; and corner chipping happening in the machining process of the workpiece dovetail groove is prevented.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing of composite materials, and in particular relates to a processing method for variable-section dovetail blind grooves of composite materials, which aims at realizing the machinability of variable-section dovetail blind grooves for composite materials. Background technique [0002] Dovetail groove belongs to a kind of mechanical structure, which is generally used for mechanical relative movement, and also used for assembly guidance, positioning and support. Because of its high precision and stability, it is widely used in machine tool manufacturing. In guide rails, slide grooves and other similar dovetail structure workpieces, the dovetail groove is generally a through structure, and the processing method is milling by slotting or custom dovetail groove forming milling cutter. [0003] When the dovetail groove is a dovetail blind groove with variable cross-section made of composite ma...

AI Technical Summary

Problems solved by technology

[0003] When the dovetail groove is a dovetail blind groove with variable cross-section made of composite materials, the two sides and the bottom surface of the dovetail groove are inclined relative to the bottom surface of the workpiece, and the extended end of the section is in the form of a blind groove structure that does not pass through. The traditional dovetail groove processing method will The end position of the dovetail groove produces an overcut problem, and the machining process needs to optimize the cutting path of the tool, that is, to complete the machining of the dovetail groove without interference between the tool and the workpiece

At the same time, the traditional dovetail groove processing method cannot meet the processing requirements of composite materials, and the durability of the tool is reduced. At the same time, the production cost is correspondingly increased and the quality of the processed surface is reduced.

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