Machining tool for narrow cavity on outer side of blisk of air compressor of aero-engine

Abstract

A machining tool for a narrow cavity in the outer side of an aeroengine compressor blisk comprises a first tool and a second tool, the sections of the two tools are L-shaped turning tools, a tool handle is an L-shaped long handle, and a turning tool is an L-shaped short handle. The included angle between the long handle and the short handle is 110-135 degrees; the connecting block between the long handle and the short handle of the first cutter is arranged on the inner side of the included angle; the connecting block between the long handle and the short handle of the second cutter is arranged on the outer side of the included angle; the connecting block of the long handle and the short handle is used for bearing stress of the L-shaped short handle of the turning tool during turning and is connected to the long handle of the tool, and the sectional area of the long handle of the tool is a square block. The section of the tool long handle is completely matched with the installation opening of the tool magazine. The turning tool is characterized in that the turning tool is a thin-sheet turning tool, the thickness of the thin-sheet turning tool is 1 / 3-1 / 5 of the thickness of the rectangular tool bar, and the length of the thin-sheet turning tool is 3-8cm.

Description

Technical Field

[0001] The utility model relates to a processing tool and a processing fixture, in particular to a (paired) processing device for the narrow cavity outside the integral blade disk of a compressor. Background Art

[0002] Since the integral blade of the aircraft engine compressor is an extremely important workpiece with extremely high precision requirements and many processing difficulties, the processing of the narrow cavity on the outside of the integral blade of the compressor is currently a difficult problem. The integral blade is relatively special and important in industrial positioning. Some comprehensive considerations in the design of the workpiece determine its special structure. The narrow cavity on the outside of the integral blade of the compressor is a narrow space with a very deep processing stroke and an angle that is not conducive to processing. In addition, the extremely important comb teeth at the outer mouth of the narrow cavity are already difficult to process. The difficulty is even greater. The shape of the workpiece is Figure 1 shown.

[0003] The existing technology uses extremely narrow and long tools for processing on a machining center or an automatic lathe, but this tool needs to be sharpened on both sides, which requires too high processing accuracy of the tool (the dimensional accuracy of the sharpening on both sides of the tool needs to be 5 microns or higher, the cost of the tool is high, and the processing life is short), otherwise it will affect the processing accuracy of the workpiece.

[0004] The processing space of the narrow cavity on the outside of the integral blade disk of the compressor is too small, and the processing range is limited. There are no tools on the market that can enter for processing. The processing accuracy requirements are high, and processing cannot be carried out without a good processing plan. Utility Model Content

[0005] The purpose of the utility model is to propose a processing tool and a processing machine tool for the narrow outer cavity of the integral blade disk of an aircraft engine compressor, aiming at the above-mentioned problem and solving the problems of low processing efficiency and high cost due to the narrow outer cavity space of the integral blade disk of the compressor.

[0006] The technical solution of the utility model is as follows: a machining tool for the narrow cavity on the outer side of the integral blade disk of an aircraft engine compressor, comprising a first tool and a second tool, the cross-sections of the two tools are L-shaped turning tool tools, the tool handle is an L long handle, and the turning tool is an L short handle; the angle between the long handle and the short handle is 110-135 degrees; the connecting block between the long handle and the short handle of the first tool is on the inner side of the angle, and the connecting block between the long handle and the short handle of the second tool is on the outer side of the angle; the connecting block between the long handle and the short handle is used to support the force of the turning tool L short handle during turning and connect to the tool long handle, and the tool long handle itself has a square cross-sectional area; the cross-section of the tool long handle completely matches the installation port of the tool library. The tool library pushes out the first tool for machining the inner side of the U-shaped narrow cavity (groove) on the outer side of the blade disk; the second tool specifically machines the outer side of the U-shaped narrow cavity (groove) on the outer side of the blade disk; the surfaces of the narrow cavity U-shaped (groove) are all machined by using these two tools respectively.

[0007] Beneficial effects: The utility model designs two pairs of tools based on existing conditions. For the narrow cavity outside the integral blade disk, the cross section perpendicular to the cavity is U-shaped (arc-shaped groove), optimizes the processing plan and uses the re-program to reasonably cooperate to solve the processing problems and reduce the design cost. The processing accuracy of the two tools does not need to be too high, and one working surface of the tool can have a 10-micron accuracy. The cost of the tool is not high, and the processing life is long, and the processing accuracy of the workpiece is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 Schematic diagram of the U-shaped (groove) cross section of the narrow cavity on the outside of the workpiece blade disk; coordinate letters are shown in the figure;

[0009] Figure 2A , Figure 2B They are respectively the cutter bar segmentation diagrams of the first cutter and the second cutter when preparing the utility model;

[0010] Figure 3A , Figure 3B They are schematic diagrams of the structures of the first tool and the second tool of the utility model respectively;

[0011] Figure 4 and Figure 5 It is a schematic diagram of the use of the first tool and the second tool of the utility model respectively. DETAILED DESCRIPTION

[0012] According to the narrow cavity space outside the compressor blade Figure 1 In order to take advantage of the narrow feature of A, two knives are designed to be used in combination.

[0013] Design an optimal line cutting angle (thick line in Figure 2), separate the two long thin-sheet turning tools and the rectangular tool bar (tool bar part), grind the split surface to prevent the secondary welding from affecting the tool rigidity. Separate the two tools, grind and weld them again after grinding, as shown in Figure 2. The rectangular tool bar is divided into L short-handled turning tools and supports, and is still vertically cut and ground. The cross section of the support has a right-angle protrusion. The (front end) turning tool is a thin-sheet turning tool, the thickness of the thin-sheet turning tool is 1 / 3 to 1 / 5 of the thickness of the rectangular tool bar, and the length of the thin-sheet turning tool is 3-8 cm.

[0014] A turning tool with an L-shaped cross section comprises a tool holder with an L-shaped long handle, a turning tool and a short handle with an L-shaped support; the support has a right-angled cross section and a surface thereof is welded to a vertical surface of the tool holder; a welding connection block between the long handle and the short handle of a first tool 1 is on the inner side of the included angle, and a connection block between the long handle and the short handle of a second tool 2 is on the outer side of the included angle; the included angle between the long handle and the short handle is 110-135 degrees; the connection block between the long handle and the short handle is used to support the turning tool L short handle (1-1, 2-1) to bear force during turning and to connect to the tool long handle; the tool long handle itself is a square in cross section, has considerable strength and thickness, and its size is completely consistent with the installation of the tool magazine of an automatic lathe.

[0015] The tool magazine of the automatic lathe uses these two turning tools for turning.

[0016] The two tools are welded again, the processing plan and procedure are optimized, and two new tools are used together. Figure 4 It is a schematic diagram of the use of the utility model.

[0017] Under the premise of optimizing the processing plan and procedures, this narrow cavity is successfully processed in place with qualified quality. As shown in the figure, under the premise of designing suitable tools, the processing stroke is still so compact, which shows the difficulty of processing this type of cavity.

[0018] To sum up: the utility model is highly practical and flexible, and is applicable to similar workpieces within a certain range. It saves costs while ensuring qualified quality, innovates, expands processing capabilities, and brings more convenience to tooling management at the production site.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A processing tool for the narrow cavity outside the integral blade disk of an aircraft engine compressor, characterized in that: The utility model comprises a first tool and a second tool, the cross-sections of the two tools are L-shaped turning tool tools, the tool handle is an L long handle, and the turning tool is an L short handle; the angle between the long handle and the short handle is 110-135 degrees; the connecting block between the long handle and the short handle of the first tool is on the inner side of the angle, and the connecting block between the long handle and the short handle of the second tool is on the outer side of the angle; the connecting block between the long handle and the short handle is used to support the force of the turning tool L short handle during turning and to connect to the tool long handle, the cross-sectional area of ​​the tool long handle itself is a square; the cross-section of the tool long handle completely matches the mounting port of the tool magazine.

2. The processing tool for the narrow cavity outside the integral blade disk of an aircraft engine compressor according to claim 1 is characterized in that: The turning tool is a thin-sheet turning tool, the thickness of which is 1 / 3 to 1 / 5 of the thickness of the rectangular tool bar, and the length of which is 3 to 8 cm.

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