Rolling, clamping and positioning method for single-journal rectifying blade of high-pressure compressor

Abstract

The invention provides a rolling, clamping and positioning method for a single-journal rectifying blade of a high-pressure compressor. According to the technical scheme, the rolling, clamping and positioning method comprises the steps that (1) a positioning block is designed and machined on the end face of a blade journal; a cuboid clamping positioning block is designed on the end face of the shaft neck, a datum point is arranged on the blade profile blank face, the blade profile blank face is clamped, and the shaft neck and the positioning block are milled. (2) a rolling chuck is designed; 3) a positioning and clamping process; mounting the clamp on a rolling mill; the Z1 face of the blade positioning block abuts against the Z-direction positioning face of the base 1, the Y1 face of the blade positioning block makes contact with the Y-direction positioning face, and the shaft neck is placed on the lower supporting block. And the positioning block is pressed to finish clamping and positioning. The method has the advantages that the requirement for the accurate torsion position degree of the blade profile is met, the rolling qualification rate of the blade profile is increased, the waste loss caused by pressing damage to the surface of the shaft neck is reduced, the machining cost is saved, and the good income effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of aeroengine blade manufacturing, and in particular to a rolling, clamping and positioning method for a single-journal straightening blade of a high-pressure compressor. Background Art

[0002] Blades are an important component of aircraft engines. Their precision size and performance greatly affect the overall performance and safety of the engine. Therefore, the profile size and position of aircraft engine blades have strict tolerance requirements. They are generally processed by precision forging, CNC milling and other methods, which have high manufacturing costs.

[0003] In recent years, the manufacturing of aircraft engine blades has put forward new requirements for efficient and low-cost manufacturing while meeting the performance requirements. Among all the current compressor blade surface processing methods, blade rolling technology has the characteristics of excellent blade structure performance, high efficiency and low cost, and has obvious advantages.

[0004] The single-journal straightening blade of the high-pressure compressor plays the role of guiding the gas flow in the engine. Its structure is mainly composed of three parts: a cylindrical journal, an edge plate, and a blade body profile. Some blades require the blade body profile to be processed by a rolling process. The blade processing process is to first process the journal and the edge plate, and then place the blade profile raw material in the direction of rotation around the axis at an angle that is easy to roll, clamp the journal, and complete the blade body rolling. However, since the journal and the edge plate are both cylindrical, there is a lack of conditions for achieving stable angular positioning, and the journal surface is easily damaged during the clamping process, resulting in the scrapping of parts. Therefore, the present invention is a clamping and positioning method suitable for rolling of such blades, which can provide stable and accurate angular positioning and avoid damaging the journal surface. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that angular positioning is difficult during rolling of single-neck blades and the neck surface is easily damaged. Through a reliable and stable angular positioning method, the precise torsional position requirements of the blade profile are guaranteed, the blade profile rolling qualification rate is improved, the scrap loss caused by neck surface damage is reduced, and processing costs are saved. A rolling clamping and positioning method for a single-neck straightening blade of a high-pressure compressor is provided.

[0006] The present invention provides a rolling clamping positioning method for a single-shaft-neck straightening blade of a high-pressure compressor, which is characterized by: a rolling clamping positioning method for a single-shaft-neck straightening blade of a high-pressure compressor, and its technical solution includes:

[0007] 1) Design and process positioning blocks on the end face of the blade journal

[0008] Step 1: Rotate the blade around its own axis Z axis by an angle α, so that the torsion angle of each section of the blade profile relative to the X axis of the blade profile coordinate system tends to be symmetrically distributed. The calculation method of α is: α i is the chord angle of each designed section of the blade.

[0009] Step 2: Design a rectangular clamping and positioning block on the end face of the shaft neck, as shown in the attached Figure 1 As shown, its length (X-axis direction), width (Z-axis direction) and height (Y-axis direction) are: a = (1.5 ~ 1.6) d, b = (0.5 ~ 0.6) L, h = (0.7 ~ 0.8) d, d is the journal diameter, L is the journal length, and the center of the cuboid coincides with the blade axis Z axis.

[0010] Step 3: Set the reference point on the blade rough surface, clamp the blade rough surface, and mill out the shaft neck and positioning block.

[0011] 2) Design of roller chuck

[0012] Step 1: Position block X 1 , Y 1 , Z 1 The surface is the positioning reference surface, X 2 , Y 2 The surface is the clamping surface. According to the size of the positioning block, the shaft neck, and the connecting part of the rolling mill, the base 1, the side positioning plate 2, the side clamping plate 3, the upper wedge-shaped clamping block 4, the upper protective sleeve 5, the lower support block 6, the guide pin 1 7, the guide pin 2 8, the adjusting screw 9, and the fastening screw 10 are designed. Figure 2 , 3 shown.

[0013] Step 2: Base 1 Design and Y 1 , Z 1 The positioning reference surface corresponding to the surface plays a role in positioning in the Y and Z directions. The inner side surface above the base 1 is designed as an inclined surface, which cooperates with the wedge-shaped clamping block 4 to achieve the clamping effect in the Y direction. The base 1 is used as a connecting component with the rolling mill, and a connecting interface is provided at one end.

[0014] Step 3: Design of Side Positioning Plate 2 and X 1 The positioning reference surface corresponding to the surface plays a role in X-direction positioning and is connected to the base 1 by fastening screws 10.

[0015] Step 4: The side clamping plate 3 is connected to the base 1 through the guide pin 1 7, the guide pin 2 8 and the adjusting screw 9. By rotating the adjusting screw 9, it drives the clamping positioning block to play a clamping role in the X direction.

[0016] Step 5: The wedge-shaped pressing block 4 is a movable part, and its upper surface is an inclined surface, which cooperates with the upper inner side surface of the base 1 to expand and tighten the positioning block in the Y direction.

[0017] Step 6: The upper protective sleeve 5 is made of resin material, which is in contact with the shaft neck, plays a role of auxiliary support and preventing the shaft neck from being deformed by force, and is connected to the wedge-shaped clamping block 4 by fastening screws 10.

[0018] Step 7: The lower support block 6 is a movable part made of resin material. It contacts the journal and plays a role of auxiliary support and preventing the journal from being deformed by force. The lower support block 6 is placed in the groove on the base 1 and can move a small amount in the groove along the X-axis direction.

[0019] 3) Positioning and clamping process

[0020] Step 1: Install the fixture on the rolling mill.

[0021] Step 2: Position the blade block Z 1 The surface is close to the positioning surface of the base 1Z direction, Y 1 The surface contacts the Y-direction positioning surface, and the journal is placed on the lower support block 6.

[0022] Step 3: Rotate the adjusting screw 9 to drive the side clamping plate 3 to clamp the positioning block, so that the positioning block X 1 The surface rests on the reference surface of the side positioning plate 2.

[0023] Step 4: Place the connected wedge-shaped clamping block 4 and the upper protective sleeve 5 on the shaft neck, and use a copper hammer to knock the wedge-shaped clamping block 4 along the Z direction to clamp the positioning block to complete the clamping and positioning.

[0024] Advantages of the present invention:

[0025] The rolling, clamping and positioning method for the single-neck straightening blade of a high-pressure compressor described in the present invention effectively solves the problems of difficult angular positioning during rolling of single-neck blades and easy crushing of the neck surface. Through a reliable and stable angular positioning method, the precise torsional position requirements of the blade profile are guaranteed, the qualified rate of blade profile rolling is improved, the scrap loss caused by crushing of the neck surface is reduced, the processing cost is saved, and a good profit effect is achieved. With the promotion and application of this technology, the economic benefits will be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0027] Figure 1 Blade coordinate system direction and clamping positioning block diagram;

[0028] Figure 2 Roller chuck Figure 1 ;

[0029] Figure 3 Roller chuck Figure 2 ;

[0030] In the figure, 1-base, 2-side positioning plate, 3-side clamping plate, 4-wedge-shaped clamping block, 5-upper protective sleeve, 6-lower support block, 7-guide pin one, 8-guide pin two, 9-adjusting screw, 10-fastening screw. DETAILED DESCRIPTION

[0031] The present invention will be further explained below in conjunction with specific implementation plans, but the present invention is not limited thereto. The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0032] Example 1

[0033] A rolling, clamping and positioning method for a single-shaft-neck straightening blade of a high-pressure compressor, characterized in that: A rolling, clamping and positioning method for a single-shaft-neck straightening blade of a high-pressure compressor, the technical solution of which includes:

[0034] 1) Design and process positioning blocks on the end face of the blade journal

[0035] Step 1: Rotate the blade around its own axis Z axis by an angle α, so that the torsion angle of each section of the blade profile relative to the X axis of the blade profile coordinate system tends to be symmetrically distributed. The calculation method of α is: α i is the chord angle of each designed section of the blade.

[0036] Step 2: Design a rectangular clamping and positioning block on the end face of the shaft neck, as shown in the attached Figure 1 As shown, its length (X-axis direction), width (Z-axis direction) and height (Y-axis direction) are: a = (1.5 ~ 1.6) d, b = (0.5 ~ 0.6) L, h = (0.7 ~ 0.8) d, d is the journal diameter, L is the journal length, and the center of the cuboid coincides with the blade axis Z axis.

[0037] Step 3: Set the reference point on the blade rough surface, clamp the blade rough surface, and mill out the shaft neck and positioning block.

[0038] 2) Design of roller chuck

[0039] Step 1: Position block X 1 , Y 1 , Z 1 The surface is the positioning reference surface, X 2 , Y 2The surface is the clamping surface. According to the size of the positioning block, the shaft neck, and the connecting part of the rolling mill, the base 1, the side positioning plate 2, the side clamping plate 3, the upper wedge-shaped clamping block 4, the upper protective sleeve 5, the lower support block 6, the guide pin 1 7, the guide pin 2 8, the adjusting screw 9, and the fastening screw 10 are designed. Figure 2 , 3 shown.

[0040] Step 2: Base 1 Design and Y 1 , Z 1 The positioning reference surface corresponding to the surface plays a role in positioning in the Y and Z directions. The inner side surface above the base 1 is designed as an inclined surface, which cooperates with the wedge-shaped clamping block 4 to achieve the clamping effect in the Y direction. The base 1 is used as a connecting component with the rolling mill, and a connecting interface is provided at one end.

[0041] Step 3: Design of Side Positioning Plate 2 and X 1 The positioning reference surface corresponding to the surface plays a role in X-direction positioning and is connected to the base 1 by fastening screws 10.

[0042] Step 4: The side clamping plate 3 is connected to the base 1 through the guide pin 1 7, the guide pin 2 8 and the adjusting screw 9. By rotating the adjusting screw 9, it drives the clamping positioning block to play a clamping role in the X direction.

[0043] Step 5: The wedge-shaped pressing block 4 is a movable part, and its upper surface is an inclined surface, which cooperates with the upper inner side surface of the base 1 to expand and tighten the positioning block in the Y direction.

[0044] Step 6: The upper protective sleeve 5 is made of resin material, which is in contact with the shaft neck, plays a role of auxiliary support and preventing the shaft neck from being deformed by force, and is connected to the wedge-shaped clamping block 4 by fastening screws 10.

[0045] Step 7: The lower support block 6 is a movable part made of resin material. It contacts the journal and plays a role of auxiliary support and preventing the journal from being deformed by force. The lower support block 6 is placed in the groove on the base 1 and can move a small amount in the groove along the X-axis direction.

[0046] 3) Positioning and clamping process

[0047] Step 1: Install the fixture on the rolling mill.

[0048] Step 2: Position the blade block Z 1 The surface is close to the positioning surface of the base 1Z direction, Y 1 The surface contacts the Y-direction positioning surface, and the journal is placed on the lower support block 6.

[0049] Step 3: Rotate the adjusting screw 9 to drive the side clamping plate 3 to clamp the positioning block, so that the positioning block X 1 The surface rests on the reference surface of the side positioning plate 2.

[0050] Step 4: Place the connected wedge-shaped clamping block 4 and the upper protective sleeve 5 on the shaft neck, and use a copper hammer to knock the wedge-shaped clamping block 4 along the Z direction to clamp the positioning block to complete the clamping and positioning.

[0051] Example 2

[0052] Rolling clamping and positioning method for single-journal straightening blades of high-pressure compressor:

[0053] The blade profile has 7 control sections, and the chord angles are α 1 =6°25′, α 2 =4°20′, α 3 =2°10′, α 4 =-1°10′, α 5 =-3°30′, α 6 =-5°40′, α 7 =-6°10′, the journal diameter is d=9mm, and the journal length is L=24mm.

[0054] 1) Design and process positioning blocks on the end face of the blade journal

[0055] Step 1: Calculate the rotation angle The blade is rotated around its own axis Z axis by an angle of 0°31′, so that the torsion angles of the blade profiles of each section with respect to the X axis of the blade profile coordinate system tend to be symmetrically distributed.

[0056] Step 2: Design a rectangular clamping and positioning block on the end face of the journal, with a length a=1.5d=13.5mm, a width b=0.5L=12mm, a height h=0.8d=7.2mm, and the center of the rectangle coincides with the Z axis of the blade.

[0057] Step 3: Set the reference point on the blade rough surface, clamp the blade rough surface, and mill out the shaft neck and positioning block.

[0058] 2) Design of roller chuck

[0059] Design the roll chuck according to steps 1 to 7 of designing the roll chuck.

[0060] 3) Positioning and clamping process

[0061] Complete the blade clamping and positioning according to steps 1 to 4 of the positioning and clamping process.

[0062] Matters not covered by the present invention are known technologies.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rolling clamping and positioning method for a single-journal straightening blade of a high-pressure compressor, characterized in that: The rolling, clamping and positioning method of the single-journal straightening blade of a high-pressure compressor comprises: 1) Design and process positioning blocks on the end face of the blade journal; 2) Design the roller chuck; 3) Positioning and clamping process.

2. The method for rolling, clamping and positioning a single-journal straightening blade for a high-pressure compressor according to claim 1, characterized in that: The design and processing of the positioning block on the end face of the blade journal comprises the following steps: Step 1: Rotate the blade around its own axis Z axis by an angle α, so that the torsion angle of each section of the blade profile relative to the X axis of the blade profile coordinate system tends to be symmetrically distributed. The calculation method of α is: α i is the chord angle of each design section of the blade; Step 2: Design a rectangular clamping and positioning block on the end face of the journal, the length, width and height of which are: a = (1.5 ~ 1.6) d, b = (0.5 ~ 0.6) L, h = (0.7 ~ 0.8) d, d is the journal diameter, L is the journal length, and the center of the rectangular block coincides with the Z axis of the blade; Step 3: Set the reference point on the blade rough surface, clamp the blade rough surface, and mill out the shaft neck and positioning block.

3. The method for rolling, clamping and positioning a single-journal straightening blade for a high-pressure compressor according to claim 1, characterized in that: The design of the rolling chuck comprises the following steps: Step 1: Using the X1, Y1, and Z1 surfaces of the positioning block as positioning reference surfaces and the X2 and Y2 surfaces as clamping surfaces, design the base (1), the side positioning plate (2), the side clamping plate (3), the upper wedge-shaped clamping block (4), the upper protective sleeve (5), the lower support block (6), the guide pin 1 (7), the guide pin 2 (8), the adjusting screw (9), and the fastening screw (10) according to the dimensions of the positioning block, the shaft neck, and the connecting part of the rolling mill; Step 2: The base (1) is designed with a positioning reference surface corresponding to the Y1 and Z1 surfaces to play a positioning role in the Y and Z directions; the upper inner side surface of the base (1) is designed to be an inclined surface to cooperate with the wedge-shaped clamping block 4 to achieve a clamping effect in the Y direction; the base (1) is used as a connecting component with the rolling mill, and a connecting interface is provided at one end; Step 3: The side positioning plate (2) is designed with a positioning reference surface corresponding to the X1 surface, which plays a role in positioning in the X direction, and is connected to the base (1) with fastening screws 10; Step 4: The side clamping plate (3) is connected to the base (1) through the guide pin 1 (7), the guide pin 2 (8) and the adjusting screw (9), and the adjusting screw 9 is rotated to drive the clamping positioning block to play a clamping role in the X direction; Step 5: The wedge-shaped pressing block (4) is a movable part, and its upper surface is an inclined surface, which cooperates with the upper inner side surface of the base (1) to expand and tighten the positioning block in the Y direction; Step 6: The upper protective sleeve 5 is made of resin material, which contacts the shaft neck and plays a role of auxiliary support and preventing the shaft neck from being deformed by force, and is connected to the wedge-shaped pressing block (4) by screws (10); Step 7: The lower support block (6) is a movable part made of resin material. It is in contact with the journal and plays a role in auxiliary support and preventing the journal from being deformed by force. The lower support block (6) is placed in a groove on the base (1) and can move a small amount in the groove along the X-axis direction.

4. The method for rolling, clamping and positioning a single-journal straightening blade for a high-pressure compressor according to claim 1, characterized in that: The positioning and clamping process comprises the following steps: Step 1: Install the fixture on the rolling mill; Step 2: Place the Z1 surface of the blade positioning block against the Z-direction positioning surface of the base (1), with the Y1 surface in contact with the Y-direction positioning surface, and place the shaft neck on the lower support block (6); Step 3: Rotate the adjusting screw (9) to drive the side clamping plate (3) to clamp the positioning block, so that the surface X1 of the positioning block rests on the reference surface of the side positioning plate (2); Step 4: Place the connected wedge-shaped clamping block (4) and the upper protective sleeve (5) on the shaft neck, and use a copper hammer to knock the wedge-shaped clamping block (4) along the Z direction to clamp the positioning block to complete the clamping and positioning.

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