A method and device for controlling deformation during machining of thin-walled rectifier

Abstract

The present invention discloses a method and apparatus for controlling deformation during machining of a thin-walled rectifier. The method includes a process for controlling deformation during machining of a radially outer peripheral surface III of the rectifier using a machining apparatus for the thin-walled rectifier to compress the top shaft end of the rectifier so that it is not in a free state and the blade does not vibrate. The top shaft end of the rectifier is compressed by the machining apparatus for the thin-walled rectifier so that it is not in a free state and the blade does not vibrate, thereby controlling deformation during machining of the radially outer peripheral surface III of the rectifier. This solves the problem of blade vibration occurring when machining the radially outer peripheral surface III of the rectifier while the blade is in a free state.

Description

Technical Field

[0001] The invention relates to a mechanical processing deformation control method and a processing device for a thin-wall rectifier, belonging to the technical field of aviation parts processing. Background Art

[0002] The rectifier is an important part of the stator of the high-pressure compressor of an aircraft engine. Since the rectifier 1 is thin, with the thinnest part being only 2.48 mm, the rigidity is poor, and the rectifier is composed of a thin-walled ring 11 and blades 12. Figure 5 As shown in the figure, the tool vibrates severely during the machining process.

[0003] In order to solve the problem of tool vibration during machining of thin-walled rings due to insufficient rigidity, existing technologies such as Chinese Patent Publication No. CN114055688A provide a wax pouring device for enhancing the rigidity of thermal insulation tube machining. The disclosed technology is: wax is poured into a cavity formed by the inner conical surface of the thermal insulation tube, the outer peripheral surface of the rigid ring and the base, and solidified into shape after cooling, thereby completing the enhancement of the rigidity of thermal insulation tube machining. Although the wax solidifies within the diameter of the thin-walled ring to enhance the rigidity and prevent resonance and tool vibration when machining the axial end face, when machining the radial outer peripheral surface of the thin-walled ring, the wax cannot be completely filled because space for machining the inner diameter must be reserved at the top, resulting in the tool vibration problem at the top shaft end that is in a free state when machining the radial outer peripheral surface. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a method and a processing device for controlling the mechanical deformation of a thin-walled rectifier.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a method for controlling deformation during machining of a thin-walled rectifier, comprising:

[0007] The invention relates to a machining deformation control process in which a thin-walled rectifier processing device is used to press the top shaft end of the rectifier so that it does not present a free state and does not vibrate the cutter to perform machining of the radial outer peripheral surface III.

[0008] Specifically, the radial outer peripheral surface III is processed as follows: the cover plate is screwed onto the base by bolts A to press the tin-bismuth alloy coating on the top of the rectifier; the pressure plate is removed from the base by bolts C; the positioning ring support is pressed by the cover plate on the tin-bismuth alloy coating below the top of the rectifier, so that the top shaft end of the rectifier is compressed and not in a free state, thereby controlling the deformation of the radial outer peripheral surface III during machining.

[0009] Before performing the step of processing the radial outer peripheral surface III, the method further includes the steps of casting and filling support, pressing support, and processing the axial end surface I and the radial inner peripheral surface II.

[0010] The pouring and filling support step comprises: pouring and filling tin-bismuth alloy onto the inner diameter surface of the thin-walled ring of the rectifier to form a tin-bismuth alloy wrapping layer, wherein the tin-bismuth alloy wrapping layer wraps the outer periphery of the blade at the inner diameter surface of the thin-walled ring, and the tin-bismuth alloy wrapping layer is spaced from the top of the inner diameter surface of the thin-walled ring to form a step for contacting the cover plate.

[0011] The pressing and supporting step comprises: a positioning ring is detachably screwed onto a base below the cover plate by bolts B; a rectifier cast with a tin-bismuth alloy coating is placed on the base; the cover plate is screwed onto the top of the base by bolts A; the positioning ring is supported on the tin-bismuth alloy coating at the bottom of the rectifier; and the cover plate presses the tin-bismuth alloy coating at the top of the rectifier above the positioning ring.

[0012] The pressure plate is detachably screwed on the base by bolts C to press the outer peripheral step of the rectifier outer diameter. The support protrusion supports the lower part of the rectifier pressed by the pressure plate. The support is detachably screwed on the base by bolts D to support the bottom of the outer end of the pressure plate away from the rectifier.

[0013] The steps for processing the axial end surface I and the radial inner surface II are as follows: the cover plate is removed from the base by bolts A, the pressure plate is pressed against the outer peripheral step of the rectifier where the tin-bismuth alloy coating is cast by bolts C, the support supports the end of the pressure plate away from the rectifier, and the support protrusion and positioning ring support the tin-bismuth alloy coating below the rectifier, and then the axial end surface I and the radial inner surface II are processed.

[0014] A processing device for a thin-walled rectifier, comprising:

[0015] base;

[0016] The cover plate is detachably screwed and fixed to the middle of the base by bolt A;

[0017] A positioning ring, which is detachably screwed and fixed to the base below the cover plate by bolts B;

[0018] A pressure plate, which is detachably screwed onto the base by bolts C, and presses against the peripheral step of the outer diameter of the rectifier cast with the tin-bismuth alloy wrapping layer;

[0019] A supporting protrusion for supporting the rectifier is fixed on the base below the pressure plate and the rectifier cantilever.

[0020] The base outside the bolt C is fixed with a support by means of a bolt D which is detachably screwed together.

[0021] The support supports the bottom surface of the end of the pressure plate away from the rectifier.

[0022] The beneficial effect of the present invention is that the top shaft end of the rectifier is pressed by the processing device of the thin-walled rectifier and is not in a free state, and no vibration occurs, thereby achieving the control of the mechanical processing deformation of the radial outer peripheral surface III of the rectifier, and solving the problem of vibration occurring in a free state when the radial outer peripheral surface III of the rectifier is processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 2. It is a schematic diagram of the structure of the processing device of the present invention completely pressing down the rectifier with the tin-bismuth alloy coating;

[0024] Figure 2 Schematic diagram of the compression force on the shaft end face A and the inner diameter face B of the rectifier processed and cast with the tin-bismuth alloy coating according to the present invention;

[0025] Figure 3 Schematic diagram of the compression force on the radial outer peripheral surface C of the rectifier processed and cast with the tin-bismuth alloy wrapping layer according to the present invention;

[0026] Figure 4 Schematic diagram of a rectifier wrapped with a tin-bismuth alloy wrapping layer according to the present invention;

[0027] Figure 5 It is a partial schematic diagram of a thin-walled rectifier;

[0028] In the figure: 1-rectifier; 11-thin-walled ring; 12-blade; 13-tin-bismuth alloy wrapping layer; 2-base; 3-bolt A; 4-cover plate; 5-bolt B; 6-locating ring; 7-bolt C; 8-pressure plate; 9-support; 91-bolt D. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0030] like Figures 1 to 4 shown.

[0031] A processing device for a thin-walled rectifier of the present application includes:

[0032] The base 2 provides a force-bearing connection foundation. The base 2 is an annular body. Figure 1 The middle branch is shown in half, and the middle part of the base 2 is detachably screwed with a bolt A3 via a threaded pair;

[0033] A cover plate 4 is screwed onto the bolt A3 , and the cover plate 4 is used to press onto the top axial end face of the rectifier 1 on which the tin-bismuth alloy wrapping layer 13 is cast.

[0034] The base 2 below the cover plate 4 is detachably screwed with a positioning ring 6 by means of a bolt B5. The positioning ring 6 is positioned and supported below the rectifier 1 on which a tin-bismuth alloy wrapping layer 13 is cast. The positioning ring 6 presses the bottom of the rectifier 1 and faces the cover plate 4 pressing the top of the rectifier 1, thereby preventing the rectifier 1 from being pressed or suspended in the air at the support.

[0035] A pressure plate 8 is detachably screwed and mounted on the base 2 by bolts C7. The pressure plate 8 presses on the peripheral step of the outer diameter of the rectifier 1 cast with the tin-bismuth alloy wrapping layer 13. A support protrusion 21 for supporting the rectifier 1 is integrally connected to the base 2 where the pressure plate 8 is close to the cantilever of the rectifier 1. When the pressure plate 8 applies downward pressure to the rectifier 1, the support protrusion 21 applies support upward to prevent the bottom of the rectifier 1 pressed by the pressure plate 8 from being suspended in the air.

[0036] The base 2 outside the bolt C7 is detachably screwed with a support 9 via a bolt D91. The support 9 supports the bottom surface of the end of the pressure plate 8 away from the rectifier 1 to prevent the pressure plate 8 from being pried around the bolt C7, resulting in an unstable state of pressing the rectifier 1.

[0037] The present invention provides a method for controlling deformation during machining of a thin-walled rectifier, comprising:

[0038] The thin-walled rectifier processing device is used to press the top shaft end of the rectifier 1 so that it does not present a free state and does not vibrate the cutter to perform machining deformation control on the radial outer peripheral surface III.

[0039] Specifically:

[0040] Casting and filling support: A tin-bismuth alloy is cast and filled onto the inner diameter surface of the thin-walled ring 11 of the rectifier 1 to form a tin-bismuth alloy wrapping layer 13. The tin-bismuth alloy wrapping layer 13 wraps around the outer periphery of the blades 12 on the inner diameter surface of the thin-walled ring 11. A distance between the tin-bismuth alloy wrapping layer 13 and the top of the inner diameter surface of the thin-walled ring 11 forms a step for contacting the cover plate 4.

[0041] Compression support: The positioning ring 6 is detachably screwed onto the base 2 below the cover plate 4 via bolts B5. The rectifier 1, cast with the tin-bismuth alloy coating 13, is placed on the base 2. The cover plate 4 is screwed onto the top of the base 2 via bolts A3. The positioning ring 6 supports the tin-bismuth alloy coating 13 at the bottom of the rectifier 1, and the cover plate 4 presses the tin-bismuth alloy coating 1 at the top of the rectifier 1 above the positioning ring 6.

[0042] The pressure plate 8 is detachably screwed on the base 2 by bolts C7 to press the outer diameter peripheral step of the rectifier 1. The support protrusion 21 supports the lower part of the rectifier 1 pressed by the pressure plate 8. The support 9 is detachably screwed on the base 2 by bolts D91 to support the bottom of the outer end of the pressure plate 8 away from the rectifier 1.

[0043] Machining the axial end surface I and radial inner surface II: The cover plate 4 is removed from the base 2 using bolts A3. The pressure plate 8 is pressed against the outer diameter peripheral step of the rectifier 1, where the tin-bismuth alloy coating 13 is cast, using bolts C7. The support 9 supports the end of the pressure plate 8 away from the rectifier 1. The support protrusion 21 and the positioning ring 6 support the tin-bismuth alloy coating 13 below the rectifier 1 to achieve machining of the axial end surface I and radial inner surface II.

[0044] Machining of radial outer peripheral surface III: The cover plate 4 is screwed onto the base 2 via bolts A3 to press the tin-bismuth alloy coating 13 on the top of the rectifier 1. The pressure plate 8 is removed from the base 2 via bolts C7. The positioning ring 6 supports the cover plate 4 to press the tin-bismuth alloy coating 13 below the top of the rectifier 1. This tightens the top shaft end of the rectifier 1 so that it is not free and does not vibrate, thereby controlling the deformation of the radial outer peripheral surface III during machining.

[0045] Since the top shaft end of the rectifier 1 is pressed by the processing device of the thin-walled rectifier and is not in a free state, no vibration occurs, and the machining deformation of the radial outer peripheral surface III of the rectifier 1 is controlled, which solves the problem of vibration occurring in a free state when machining the radial outer peripheral surface III of the rectifier 1.

Claims

1. A method for controlling deformation during machining of a thin-walled rectifier, characterized in that: include: A machining deformation control process for machining a radial outer peripheral surface III of a rectifier (1) by using a thin-wall rectifier machining device to compress the top shaft end of the rectifier (1) so that the rectifier does not present a free state and does not vibrate; The processing device of the thin-wall rectifier comprises: Base (2); The cover plate (4) is detachably screwed and fixed to the middle of the base (2) by means of bolts A (3); A positioning ring (6), the positioning ring (6) is detachably screwed and fixed to the base (2) below the cover plate (4) by means of bolts B (5); A pressure plate (8), the pressure plate (8) is detachably screwed and fixed to the base (2) by means of a bolt C (7), and the pressure plate (8) presses on a step on the outer diameter of the rectifier (1) on which a tin-bismuth alloy wrapping layer (13) is cast; A supporting protrusion (21) for supporting the rectifier (1) is fixed to the base (2) below the cantilever of the rectifier (1) on the pressure plate (8); The radial outer peripheral surface III is processed as follows: the cover plate (4) is screwed onto the base (2) by means of bolts A (3) to press the tin-bismuth alloy wrapping layer (13) on the top of the rectifier (1); the pressure plate (8) is removed from the base (2) by means of bolts C (7); the positioning ring (6) supports the cover plate (4) to press the tin-bismuth alloy wrapping layer (13) below the top of the rectifier (1), so that the top shaft end of the rectifier (1) is pressed and does not present a free state, and the deformation of the radial outer peripheral surface III during machining is controlled; Before the step of processing the radial outer peripheral surface III, the method further includes the steps of pouring and filling support, pressing support, and processing the axial end surface I and the radial inner peripheral surface II. The pouring and filling support step comprises: pouring and filling tin-bismuth alloy onto the inner diameter surface of the thin-walled ring (11) of the rectifier (1) to form a tin-bismuth alloy wrapping layer (13); the tin-bismuth alloy wrapping layer (13) wraps the outer periphery of the blade (12) at the inner diameter surface of the thin-walled ring (11); and the tin-bismuth alloy wrapping layer (13) is spaced from the top of the inner diameter surface of the thin-walled ring (11) to form a step for contacting the cover plate (4); The pressing and supporting step is as follows: the positioning ring (6) is detachably screwed and mounted on the base (2) below the cover plate (4) by means of bolts B (5); the rectifier (1) cast with the tin-bismuth alloy wrapping layer (13) is placed on the base (2); the cover plate (4) is screwed onto the top of the base (2) by means of bolts A (3); the positioning ring (6) is supported on the tin-bismuth alloy wrapping layer (13) at the bottom of the rectifier (1); and the cover plate (4) presses the tin-bismuth alloy wrapping layer (13) at the top of the rectifier (1) above the positioning ring (6); The pressure plate (8) is detachably screwed on the base (2) by means of bolts C (7) to press the outer peripheral step of the rectifier (1); the support protrusion (21) supports the lower part of the rectifier (1) pressed by the pressure plate (8); the support (9) is detachably screwed on the base (2) by means of bolts D (91) to support the bottom of the outer end of the pressure plate (8) away from the rectifier (1); The steps for processing the axial end face I and the radial inner peripheral face II are as follows: the cover plate (4) is disassembled from the base (2) by means of the bolt A (3); the pressure plate (8) is pressed onto the outer peripheral step of the rectifier (1) on which the tin-bismuth alloy wrapping layer (13) is cast by means of the bolt C (7); the support (9) supports the end of the pressure plate (8) away from the rectifier (1); the support protrusion (21) and the positioning ring (6) support the tin-bismuth alloy wrapping layer (13) below the rectifier (1); and the axial end face I and the radial inner face II are processed.

2. The method for controlling deformation during machining of a thin-walled rectifier according to claim 1, wherein: The base (2) located outside the bolt C (7) is detachably screwed and fixed with a support (9) via a bolt D (91).

3. The method for controlling deformation during machining of a thin-walled rectifier according to claim 2, wherein: The support (9) supports the bottom surface of the end of the pressure plate (8) away from the rectifier (1).

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