A method for rolling, clamping, and positioning single-journey rectifier blades of a high-pressure compressor.

Abstract

This invention provides a rolling clamping and positioning method for a single-journal rectifier blade of a high-pressure compressor. The technical solution includes: 1) Designing and machining a positioning block on the end face of the blade journal; designing a cuboid clamping and positioning block on the end face of the journal, setting a reference point on the blade blank surface, clamping the blade blank surface, and milling the journal and positioning block. 2) Designing a rolling chuck; 3) Positioning and clamping process; installing the fixture on the rolling mill; pressing the Z1 surface of the blade positioning block against the Z-direction positioning surface of the base 1, with the Y1 surface contacting the Y-direction positioning surface, and placing the journal on the lower support block. Tightening the positioning block completes the clamping and positioning. Advantages of this invention: It ensures the precise torsional position of the blade, improves the blade rolling pass rate, reduces scrap losses caused by journal surface damage, saves processing costs, and achieves good economic benefits.

Description

Technical Field

[0001] This invention relates to the field of aero-engine blade manufacturing technology, and in particular to a rolling clamping and positioning method for a single-journey rectifier blade of a high-pressure compressor. Background Technology

[0002] Blades are an important component of aero engines. Their precision dimensions and performance greatly affect the overall performance and safety of the engine. Therefore, aero engine blade profile dimensions and positional accuracy have strict tolerance requirements. They are generally processed using methods such as precision forging and CNC milling, which have high manufacturing costs.

[0003] In recent years, the manufacturing of aero-engine blades has placed new demands on high efficiency and low cost while meeting performance requirements. Among all current compressor blade profile machining processes, blade rolling technology has significant advantages due to its superior processing properties, high efficiency, and low cost.

[0004] High-pressure compressor single-journal rectifier blades play a role in guiding gas flow in the engine. Their structure mainly consists of three parts: a cylindrical journal, a fin, and the blade profile. Some blades require the blade profile to be machined using a rolling process. The blade machining process involves first machining the journal and fin, then arranging the blade blank at an angle conducive to rolling in the rotational direction around the axis, clamping the journal, and completing the blade rolling. However, since both the journal and fin are cylindrical, there is a lack of conditions for achieving stable angular positioning, and the journal surface is easily damaged during clamping, resulting in scrapped parts. Therefore, this invention provides a clamping and positioning method suitable for the rolling of this type of blade, which can provide stable and accurate angular positioning while avoiding damage to the journal surface. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of difficult angular positioning and easy damage to the journal surface during single-journal blade rolling. By using a reliable and stable angular positioning method, the precise torsional position of the blade profile is guaranteed, the blade profile rolling qualification rate is improved, the scrap loss caused by journal surface damage is reduced, and the processing cost is saved. This invention provides a rolling clamping and positioning method for single-journal rectifier blades of high-pressure compressors.

[0006] This invention provides a roll forming clamping and positioning method for a single-journey rectifier blade of a high-pressure compressor, characterized in that: the technical solution of the roll forming clamping and positioning method for a single-journey rectifier blade of a high-pressure compressor includes:

[0007] 1) Design and machine 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 twist angles of each section of the blade relative to the X-axis of the blade coordinate system tend to be symmetrically distributed. The method for calculating α is as follows: α i The tangential angles of each design section of the blade.

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

[0010] Step 3: Set reference points on the blade blank surface, clamp the blade blank surface, and mill the journal and positioning block.

[0011] 2) Design of rolling chuck

[0012] Step 1: Using the X1, Y1, and Z1 surfaces of the positioning block as the positioning reference surfaces and the X2 and Y2 surfaces as the clamping surfaces, design the base 1, side positioning plate 2, side clamping plate 3, upper wedge-shaped clamping block 4, upper protective sleeve 5, lower support block 6, guide pin 1 7, guide pin 2 8, adjusting screw 9, and fastening screw 10, as shown in the attached diagram. Figure 2 , 3 As shown.

[0013] Step 2: The base 1 is designed with positioning reference surfaces corresponding to the Y1 and Z1 planes, serving as positioning elements in the Y and Z directions. The upper inner surface of the base 1 is designed as a slope, which cooperates with the wedge-shaped clamping block 4 to achieve clamping in the Y direction. As a connecting component to the rolling mill, the base 1 has a connection interface at one end.

[0014] Step 3: The side positioning plate 2 is designed with a positioning reference surface corresponding to the X1 surface, which plays a positioning role in the X direction, and is connected to the base 1 with fastening screws 10.

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

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

[0017] Step 6: The upper protective sleeve 5 is made of resin material. It contacts the journal and plays a role in providing auxiliary support and preventing the journal from deforming under stress. It is connected to the wedge-shaped clamping block 4 by fastening screw 10.

[0018] Step 7: The lower support block 6 is a movable part made of resin material. It contacts the journal and serves to provide auxiliary support and prevent deformation of the journal under stress. The lower support block 6 is placed in a groove on the base 1 and can move slightly along the X-axis within the groove.

[0019] 3) Positioning and clamping process

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

[0021] Step 2: Place the blade positioning block Z1 face against the positioning surface of the base 1 in the Z direction, and the Y1 face against the positioning surface in the Y direction. Place the journal on the lower support block 6.

[0022] Step 3: Rotate the adjusting screw 9 to drive the side clamping plate 3 to press the positioning block, so that the X1 surface of the positioning block rests against the reference surface of the side positioning plate 2.

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

[0024] Advantages of this invention:

[0025] The rolling clamping and positioning method for single-journal rectifier blades of high-pressure compressors described in this invention effectively solves the problems of difficult angular positioning and easy damage to the journal surface during single-journal blade rolling. Through a reliable and stable angular positioning method, the precise torsional position of the blade profile is guaranteed, the blade profile rolling qualification rate is improved, the scrap loss caused by journal surface damage is reduced, processing costs are saved, and good economic benefits are achieved. With the promotion and application of this technology, the economic benefits will be greatly improved. Attached Figure Description

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

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

[0028] Figure 2 Roller chuck Figure 1 ;

[0029] Figure 3 Roller chuck Figure 2 ;

[0030] In the diagram, 1-base, 2-side positioning plate, 3-side clamping plate, 4-wedge 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 Implementation

[0031] The present invention will be further explained below with reference to specific implementation schemes, but it is not limited to the present invention. The structures, proportions, sizes, etc. shown in the accompanying drawings are only used to complement the content disclosed in the specification, so as to enable those skilled in the art to understand and read, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0032] Example 1

[0033] A method for roll clamping and positioning a single-journey rectifier blade of a high-pressure compressor, characterized in that: the technical solution of the method for roll clamping and positioning a single-journey rectifier blade of a high-pressure compressor includes:

[0034] 1) Design and machine 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 twist angles of each section of the blade relative to the X-axis of the blade coordinate system tend to be symmetrically distributed. The method for calculating α is as follows: α i The tangential angles of each design section of the blade.

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

[0037] Step 3: Set reference points on the blade blank surface, clamp the blade blank surface, and mill the journal and positioning block.

[0038] 2) Design of rolling chuck

[0039] Step 1: Using the X1, Y1, and Z1 surfaces of the positioning block as the positioning reference surfaces and the X2 and Y2 surfaces as the clamping surfaces, design the base 1, side positioning plate 2, side clamping plate 3, upper wedge-shaped clamping block 4, upper protective sleeve 5, lower support block 6, guide pin 1 7, guide pin 2 8, adjusting screw 9, and fastening screw 10, as shown in the attached diagram. Figure 2 , 3 As shown.

[0040] Step 2: The base 1 is designed with positioning reference surfaces corresponding to the Y1 and Z1 planes, serving as positioning elements in the Y and Z directions. The upper inner surface of the base 1 is designed as a slope, which cooperates with the wedge-shaped clamping block 4 to achieve clamping in the Y direction. As a connecting component to the rolling mill, the base 1 has a connection interface at one end.

[0041] Step 3: The side positioning plate 2 is designed with a positioning reference surface corresponding to the X1 surface, which plays a positioning role in the X direction, and is connected to the base 1 with fastening screws 10.

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

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

[0044] Step 6: The upper protective sleeve 5 is made of resin material. It contacts the journal and plays a role in providing auxiliary support and preventing the journal from deforming under stress. It is connected to the wedge-shaped clamping block 4 by fastening screw 10.

[0045] Step 7: The lower support block 6 is a movable part made of resin material. It contacts the journal and serves to provide auxiliary support and prevent deformation of the journal under stress. The lower support block 6 is placed in a groove on the base 1 and can move slightly along the X-axis within the groove.

[0046] 3) Positioning and clamping process

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

[0048] Step 2: Place the blade positioning block Z1 face against the positioning surface of the base 1 in the Z direction, and the Y1 face against the positioning surface in the Y direction. Place the journal on the lower support block 6.

[0049] Step 3: Rotate the adjusting screw 9 to drive the side clamping plate 3 to press the positioning block, so that the X1 surface of the positioning block rests against the reference surface of the side positioning plate 2.

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

[0051] Example 2

[0052] Roll clamping and positioning method for single-journey rectifier blades of high-pressure compressors:

[0053] The blade profile has 7 control sections with tangential angles of α1 = 6°25′, α2 = 4°20′, α3 = 2°10′, α4 = -1°10′, α5 = -3°30′, α6 = -5°40′, and α7 = -6°10′. The journal diameter is d = 9 mm and the journal length is L = 24 mm.

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

[0055] Step 1: Calculate the rotation angle Rotate the blade around its own axis Z by 0°31′ to make the twist angle of each section of the blade relative to the X-axis of the blade coordinate system tend to be symmetrically distributed.

[0056] Step 2: Design a cuboid 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, and a height h = 0.8d = 7.2mm. The center of the cuboid coincides with the Z-axis of the blade axis.

[0057] Step 3: Set reference points on the blade blank surface, clamp the blade blank surface, and mill the journal and positioning block.

[0058] 2) Design of rolling chuck

[0059] Design the rolling chuck according to steps one through seven of the design process.

[0060] 3) Positioning and clamping process

[0061] Complete the blade clamping and positioning according to steps one through four of the positioning and clamping process.

[0062] Matters not covered in this invention are common knowledge.

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

Claims

1. A method for rolling, clamping, and positioning single-journey rectifier blades of a high-pressure compressor, characterized in that: The method for rolling, clamping, and positioning single-journey rectifier blades of a high-pressure compressor includes: 1) Design and machine positioning blocks on the end face of the blade journal; 2) Design the rolling chuck; 3) Positioning and clamping process; the design and machining of the positioning block on the end face of the blade journal includes the following steps: Step 1: Rotate the blade around its own axis (Z-axis) by an angle α, so that the twist angles of each section of the blade relative to the X-axis of the blade coordinate system tend to be symmetrically distributed. The method for calculating α is as follows: α i The tangential angles of each design section of the blade; Step 2: Design a cuboid clamping and positioning block on the end face of the journal, with the following dimensions in the length, width and height directions: a = (1.5~1.6)d, b = (0.5~0.6)L, h = (0.7~0.8)d, where d is the journal diameter and L is the journal length. The center of the cuboid coincides with the Z-axis of the blade axis. Step 3: Set reference points on the blade profile blank surface, clamp the blade profile blank surface, and mill the journal and positioning block; the design of the roll chuck includes 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), side positioning plate (2), side clamping plate (3), upper wedge clamping block (4), upper protective sleeve (5), lower support block (6), guide pin one (7), guide pin two (8), adjusting screw (9), and fastening screw (10) according to the dimensions of the positioning block, journal, and mill connection parts. Step 2: The base (1) is designed with a positioning reference surface corresponding to the Y1 and Z1 surfaces, which plays a positioning role in the Y and Z directions; the inner side of the upper part of the base (1) is designed as a slope, which cooperates with the wedge-shaped clamping block (4) to achieve the clamping effect in the Y direction; the base (1) is a connecting part with the rolling mill, and one end is provided with a connection interface. Step 3: The side positioning plate (2) is designed with a positioning reference surface corresponding to the X1 surface, which plays a positioning role in the X direction. It is connected to the base (1) with fastening screws (10). Step 4: The side clamping plate (3) is connected to the base (1) through guide pin 1 (7), guide pin 2 (8) and adjusting screw (9). By rotating the adjusting screw (9), it can clamp the positioning block and play a clamping role in the X direction. Step 5: The wedge-shaped clamping block (4) is a movable part with an inclined surface on the upper surface. It cooperates with the inner side of the base (1) to tighten the positioning block in the Y direction. Step 6: The upper protective sleeve (5) is made of resin material. It contacts the journal and plays the role of auxiliary support and preventing the journal from deforming under force. It is connected to the wedge-shaped clamping block (4) by screws (10). Step 7: The lower support block (6) is a movable part made of resin material. It contacts the journal and plays a role in providing auxiliary support and preventing the journal from deforming under stress. The lower support block (6) is placed in the groove on the base (1) and can move slightly along the X-axis within the groove. The positioning and clamping process includes the following steps: Step 1: Install the fixture on the rolling mill; Step 2: Place the blade positioning block Z1 face against the Z direction positioning surface of the base (1), the Y1 face against the Y direction positioning surface, and place the journal 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 X1 surface 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 upper protective sleeve (5) on the journal, and use a copper hammer to strike the wedge-shaped clamping block (4) along the Z direction to clamp the positioning block and complete the clamping and positioning.

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