A method for controlling blade milling and jointing of closed integral leaf ring blades

Abstract

The invention relates to a control method for milling and connecting blades of a closed integral leaf ring, which belongs to the technical field of aero-engines. The closed-type overall leaf ring blade milling and tool connection control method includes the following steps: S1 formulates the work step process of integral leaf ring blade milling; S2 selects a semi-finishing allowance and an angular adjustment allowance; S3 selects a tool; S4 designs Angular adjustment scheme for butt joint processing of inlet and exhaust blades and S5 selection of tool connection method. The closed overall leaf ring blade milling cutter connection control method realizes a substantial reduction in the number of cutter locations, a cutter size <0.02mm, and a smooth transfer of cutter locations, thereby improving the quality of blade fine milling and reducing the difficulty and workload.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a control method for milling and connecting blades of a closed integral leaf ring. Background technique [0002] Closed integral leaf ring parts are new structural parts used in aero-engines. The closed integral leaf ring parts are composed of three parts: inner ring, outer ring and blades. The inner ring and outer ring of the parts are thin-walled structures. The blade parts It is a typical cavity structure, the size of the transition fillet between the inner / outer ring and the blade is small, the shape is complex, and the blade has a complex profile with a curved and twisted structure, and the blades are shielded from each other when viewed along the axial direction, and the space between the blades is narrow, resulting in The space for the cutter is small, so it is necessary to use a small-diameter milling cutter to butt the two ends of the intake and exhaust ports. Howe...

AI Technical Summary

Problems solved by technology

However, due to the structural limitations of parts and processing machine tools, it is often necessary to turn the parts over for secondary clamping. Due to the inherent angular error of the clamping system, it will have a great impact on the step size of the butt milling cutter position. At the same time, the traditional The processing plan adopts the fine machining of the blade body and the flow channel, and then cleans the corners of the inner / outer ring and the blade. As a result, there are many positions for receiving the blade after the fine milling of the blade, and the quality of the blade is difficult to control. For example, if Figure 4 As shown, the traditional processing scheme 1 adopts the method of semi-finishing the airfoil runner→finishing the airfoil runner→cleaning the root and turning the rounded corner to reach up to 24 cutting positions / cavity; Figure 5 As shown, the traditional processing scheme 2 adopts the method of semi-finishing blade body runner→finishing blade body→semi-finishing root machining transfer fillet→finishing runner and transfer fillet as many as 12 knife positions / cavity

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