Turbine blade attitude adjustment processing method and processing device

Abstract

The present invention discloses a turbine blade posture adjustment processing method, comprising the following steps: S1, clamping a turbine blade blank on a fixture having a quick-change pallet, and aligning the stacking center of the turbine blade blank with the center of the quick-change pallet; then mounting the quick-change pallet on the turntable of a five-axis machine tool having a quick-change chuck; S2, using the installation reference of the quick-change pallet, establishing a measurement coordinate system on the five-axis machine tool to measure the turbine blade blank using the measurement coordinate system to obtain the turbine blade blank's X-direction deviation mean Dx, Y-direction tilt angle β, and torsion angle deviation mean Dα; S3, adjusting the posture of the turbine blade blank's to-be-machined surface in different directions during machining, so that the measurement coordinate system of the turbine blade blank's to-be-machined surface coincides with the machining coordinate system of the five-axis machine tool, and then machining the turbine blade blank's to-be-machined surface. The present invention also discloses a turbine blade posture adjustment processing device that utilizes the above-described turbine blade posture adjustment processing method.

Description

Technical Field

[0001] The present invention relates to the technical field of turbine blade processing, and in particular to a turbine blade attitude adjustment processing method. In addition, the present invention also relates to a turbine blade attitude adjustment processing device using the turbine blade attitude adjustment processing method. Background Art

[0002] Turbine blades are parts manufactured in large quantities in the aviation engine manufacturing industry. Therefore, how to achieve mass automation of turbine blade production is of great significance to improving the quality and efficiency of aviation engine manufacturing.

[0003] Turbine blades are first cast into blanks using precision casting technology, and then ground using a five-axis machine tool to automatically machine the blanks into finished products in batches. However, during the blank casting process, due to limitations such as temperature control, wax mold wear, and errors in manual wax mold repair, even blanks cast in the same batch have relatively poor consistency in turbine blade shape. The subsequent positioning of the turbine blades during machining is difficult, and machining allowances are left after the blanks are formed. If the positioning of the turbine blades during machining is inaccurate, the qualified rate of the finished turbine blades after batch automated processing of the turbine blade blanks will be greatly reduced. Summary of the Invention

[0004] The present invention provides a turbine blade posture adjustment processing method and processing device to solve the technical problems of poor consistency of the existing turbine blade blank after casting, great difficulty in positioning the turbine blade during machining, and low qualified rate of the finished turbine blade product.

[0005] According to one aspect of the present invention, a turbine blade attitude adjustment processing method is provided, comprising the following steps: S1, clamping a turbine blade blank on a fixture having a quick-change pallet, and making the stacking center of the turbine blade blank coincide with the center of the circle of the quick-change pallet, and then installing the quick-change pallet on a turntable of a five-axis machine tool having a quick-change chuck; S2, the five-axis machine tool establishes a measurement coordinate system based on the installation reference of the quick-change pallet, so as to measure the turbine blade blank through the measurement coordinate system, and then respectively obtain the XYZ coordinate value of the blade tip cross-sectional area stacking center, the XYZ coordinate value of the blade root cross-sectional area stacking center, the tip cross-sectional torsion angle and the root cross-sectional torsion angle, and then sequentially obtain The X-direction deviation value, Y-direction deviation value, and torsion angle deviation value of the blade tip cross-sectional area overlap center and the blade root cross-sectional area overlap center are obtained, thereby obtaining the X-direction deviation average Dx, the Y-direction inclination angle β, and the torsion angle deviation average Dα of the turbine blade blank; S3, according to the X-direction deviation average Dx, the Y-direction deviation average Dy, the Y-direction inclination angle β, and the torsion angle deviation average Dα of the turbine blade blank, adjusting the posture of the to-be-machined surface in different directions of the turbine blade blank during machining, so that the measurement coordinate system of the to-be-machined surface of the turbine blade blank coincides with the machining coordinate system of the five-axis machine tool, and then machining the to-be-machined surface of the turbine blade blank.

[0006] As a further improvement of the above technical solution:

[0007] Furthermore, the five-axis machine tool includes a first rotary axis whose axial center lines coincide with the X-axis of the measurement coordinate system and the X-axis of the machining coordinate system, and a second rotary axis whose axial center lines coincide with the center of the quick-change pallet, the stacking center of the turbine blade blank, the Z-axis of the measurement coordinate system, and the Y-axis of the machining coordinate system.

[0008] Furthermore, in step S3, when the five-axis machine tool processes the surface to be machined on the turbine blade blank that is parallel to or coincides with the YOZ plane of the measurement coordinate system, the first rotary axis rotates 90° and the second rotary axis rotates 90°±Dα to eliminate the torsion angle deviation and make the surface to be machined and the YOZ plane of the machining coordinate system coincide, and the machining position offset of the surface to be machined on the X-axis of the machining coordinate system is Dx.

[0009] Furthermore, in step S3, when the five-axis machine tool processes the surface to be machined on the turbine blade blank that is parallel to or coincides with the XOZ plane of the measurement coordinate system, the first rotary axis rotates 90°±β, and the second rotary axis rotates 90°±Dα to eliminate the torsion angle deviation and the Y-direction inclination angle, so that the surface to be machined and the YOZ plane of the machining coordinate system coincide with each other, and the machining position offset of the surface to be machined on the Y axis of the machining coordinate system is Dy1, and the machining position offset of the surface to be machined on the Z axis of the machining coordinate system is Dz, wherein Dy1=L×sinβ, Dz=L1×(1-cosβ), and L is the difference between the rotation center of the first rotary axis and the Z coordinate of the surface to be machined in the measurement coordinate system.

[0010] Furthermore, in step S3, when the five-axis machine tool processes the surface to be machined on the turbine blade blank that is parallel to or coincident with the XOY plane of the measurement coordinate system, the first rotary axis rotates ±β and the second rotary axis rotates ±Dα to eliminate the torsion angle deviation and the Y-direction inclination angle, so that the surface to be machined and the YOZ plane of the machining coordinate system coincide with each other, and the machining position offset of the surface to be machined on the Y-axis of the machining coordinate system is Dy, where Dy=L×(1-cosβ), and L is the coordinate difference between the rotation center of the first rotary axis and the surface to be machined on the Z-axis of the measurement coordinate system.

[0011] Further, in step S3, when the five-axis machine tool processes the surface to be machined on the turbine blade blank with an inclination angle of θ in the X direction in the measuring coordinate system, the first rotary axis rotates θ and the second rotary axis rotates ±Dα to eliminate the torsion angle deviation and the X-direction inclination angle, so that the surface to be machined and the YOZ plane of the machining coordinate system coincide with each other, and the machining position of the surface to be machined on the Y axis of the machining coordinate system is Y1, and the machining position of the surface to be machined on the Z axis of the machining coordinate system is Z1, wherein Y1=L×sinθ-Dx×cosθ, Z1=L×cosθ+Dx×sinθ, and L is the coordinate difference between the rotation center of the first rotary axis and the surface to be machined on the Z axis of the measuring coordinate system.

[0012] Further, in step S3, when the five-axis machine tool processes the surface to be machined on the turbine blade blank with an inclination angle of θ in the Y direction in the measuring coordinate system, the first rotary axis rotates θ±β, and the second rotary axis rotates ±Dα to eliminate the torsion angle deviation and the Y direction inclination angle, so that the surface to be machined and the YOZ plane of the machining coordinate system coincide with each other, and the machining position of the surface to be machined on the Y axis of the machining coordinate system is Y2, and the machining position of the surface to be machined on the Z axis of the machining coordinate system is Z2, wherein Y2=L×sin(θ+β)-Dy×cos(θ+β), Z2=L×cos(θ+β)+Dy×sin(θ+β), and L is the coordinate difference between the rotation center of the first rotary axis and the surface to be machined on the Z axis of the measuring coordinate system.

[0013] Furthermore, in step S2, the calculation formula of the Y-direction tilt angle β is: Among them, T is the difference between the Y-direction deviation value of the blade tip cross-sectional area stacking center and the Y-direction deviation value of the blade root cross-sectional area stacking center, and K is the difference between the Z-axis coordinate value of the blade tip cross-sectional area stacking center and the Z-axis coordinate value of the blade tip cross-sectional area stacking center.

[0014] Furthermore, in step S1, clamping the turbine blade blank on a fixture with a quick-change pallet specifically includes the following steps: the fixture clamps the turbine blade blank using the blade body surface of the turbine blade blank as a positioning reference, and arranges the root of the turbine blade blank upward, and exposes the root cross-section of the turbine blade blank, and then sets a measuring groove on the fixture to expose the tip cross-section of the turbine blade blank, and finally installs the fixture on the quick-change pallet.

[0015] According to another aspect of the present invention, a turbine blade attitude adjustment processing device is also provided, which adopts the above-mentioned turbine blade attitude adjustment processing method for processing. The turbine blade attitude adjustment processing device includes a fixture for clamping the turbine blade blank, a quick-change pallet supporting the fixture, a quick-change chuck holding the quick-change pallet, and a five-axis machine tool supporting the quick-change chuck.

[0016] The present invention has the following beneficial effects:

[0017] The turbine blade posture adjustment processing method of the present invention clamps the turbine blade blank on a fixture with a quick-change pallet, and makes the stacking center of the turbine blade blank coincide with the center of the circle of the quick-change pallet, and then installs the quick-change pallet on the turntable of a five-axis machine tool with a quick-change chuck, so as to facilitate the subsequent coordinate measurement of the turbine blade blank while clamping and fixing the turbine blade blank; and the five-axis machine tool establishes a measurement coordinate system based on the installation reference of the quick-change pallet, so as to measure the turbine blade blank through the measurement coordinate system, and then obtain the XYZ coordinate values ​​of the stacking center of the blade tip cross-section, The XYZ coordinate values ​​of the blade root cross-sectional area stacking center, the tip section torsion angle and the root section torsion angle are obtained, and then the X-direction deviation value, Y-direction deviation value and torsion angle deviation value of the blade tip cross-sectional area stacking center and the blade root cross-sectional area stacking center are obtained in sequence, thereby obtaining the X-direction deviation mean Dx, Y-direction tilt angle β and torsion angle deviation mean Dα of the turbine blade blank. Since the stacking center of the turbine blade blank coincides with the center of the quick-change pallet, the measurement coordinate system is established with the installation reference of the quick-change pallet for coordinate measurement, realizing the elimination of the turbine blade The invention relates to an installation error of a turbine blade blank; according to the X-direction deviation average value Dx, the Y-direction deviation average value Dy, the Y-direction tilt angle β, and the torsion angle deviation average value Dα of the turbine blade blank, the posture of the to-be-machined surface in different directions of the turbine blade blank is adjusted during machining, so that the measurement coordinate system of the to-be-machined surface of the turbine blade blank and the machining coordinate system of the five-axis machine tool coincide with each other to the greatest extent, so as to eliminate the machining error caused by the poor consistency of the turbine blade blank as much as possible, realize the accurate positioning of the turbine blade blank, and then accurately machine the to-be-machined surface of the turbine blade blank, thereby improving the qualified rate of the finished turbine blade product; this scheme eliminates the installation error of the turbine blade blank before machining, and then adjusts the machining posture of the turbine blade blank according to the X-direction deviation average value Dx, the Y-direction deviation average value Dy, the Y-direction tilt angle β, and the torsion angle deviation average value Dα of the turbine blade blank obtained by measurement conversion, eliminates the machining error caused by the poor consistency of the turbine blade blank, and improves the qualified rate of the finished turbine blade product when the turbine blade blank is subjected to batch automated machining. The scheme has strong practicality and is suitable for wide promotion and application.

[0018] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a flowchart of a turbine blade posture adjustment processing method according to a preferred embodiment of the present invention;

[0021] Figure 2 2 is a schematic structural diagram of a turbine blade posture adjustment processing device according to a preferred embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the posture adjustment of a turbine blade blank in the turbine blade posture adjustment processing method according to a preferred embodiment of the present invention;

[0023] Figure 4 Schematic diagram of the posture adjustment of a turbine blade blank in the turbine blade posture adjustment processing method according to a preferred embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the posture adjustment of a turbine blade blank in the turbine blade posture adjustment processing method according to a preferred embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the posture adjustment of a turbine blade blank in the turbine blade posture adjustment processing method according to a preferred embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the posture adjustment of a turbine blade blank in the turbine blade posture adjustment processing method according to a preferred embodiment of the present invention.

[0027] Legend:

[0028] 100. Fixture; 200. Quick-change pallet; 300. Quick-change chuck; 400. Five-axis machine tool; 410. Turntable; 420. First rotary axis; 430. Second rotary axis. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0030] Figure 1 It is a flowchart of a turbine blade posture adjustment processing method according to a preferred embodiment of the present invention; Figure 2 2 is a schematic structural diagram of a turbine blade posture adjustment processing device according to a preferred embodiment of the present invention; Figure 3 Schematic diagram of the posture adjustment of a turbine blade blank in the turbine blade posture adjustment processing method according to a preferred embodiment of the present invention; Figure 4 Schematic diagram of the posture adjustment of a turbine blade blank in the turbine blade posture adjustment processing method according to a preferred embodiment of the present invention; Figure 5 Schematic diagram of the posture adjustment of a turbine blade blank in the turbine blade posture adjustment processing method according to a preferred embodiment of the present invention; Figure 6 Schematic diagram of the posture adjustment of a turbine blade blank in the turbine blade posture adjustment processing method according to a preferred embodiment of the present invention; Figure 7 It is a schematic diagram of the posture adjustment of a turbine blade blank in the turbine blade posture adjustment processing method according to a preferred embodiment of the present invention.

[0031] like Figure 1 and Figure 2As shown, the turbine blade posture adjustment processing method of this embodiment includes the following steps: S1, clamping the turbine blade blank on a fixture 100 with a quick-change pallet 200, and making the stacking center of the turbine blade blank coincide with the center of the circle of the quick-change pallet 200, and then installing the quick-change pallet 200 on the turntable 410 of the five-axis machine tool 400 with a quick-change chuck 300; S2, the five-axis machine tool 400 establishes a measurement coordinate system based on the installation reference of the quick-change pallet 200, so as to measure the turbine blade blank through the measurement coordinate system, and then respectively obtain the XYZ coordinate value of the blade tip cross-sectional area stacking center, the XYZ coordinate value of the blade root cross-sectional area stacking center, the tip cross-sectional torsion angle, and the root cross-sectional torsion angle, and then obtain the X-direction deviation value, Y-direction deviation value and torsion angle deviation value of the blade tip cross-sectional area superposition center and the blade root cross-sectional area superposition center in sequence, so as to obtain the X-direction deviation average value Dx, the Y-direction inclination angle β and the torsion angle deviation average value Dα of the turbine blade blank; S3, according to the X-direction deviation average value Dx, the Y-direction deviation average value Dy, the Y-direction inclination angle β and the torsion angle deviation average value Dα of the turbine blade blank, adjust the posture of the to-be-machined surface in different directions of the turbine blade blank during machining, so that the measurement coordinate system of the to-be-machined surface of the turbine blade blank and the machining coordinate system of the five-axis machine tool 400 coincide with each other, and then machine the to-be-machined surface of the turbine blade blank.Specifically, the turbine blade posture adjustment processing method of the present invention clamps the turbine blade blank on a fixture 100 with a quick-change pallet 200, and makes the stacking center of the turbine blade blank coincide with the center of the circle of the quick-change pallet 200, and then installs the quick-change pallet 200 on a turntable 410 of a five-axis machine tool 400 with a quick-change chuck 300, so as to facilitate the subsequent coordinate measurement of the turbine blade blank while clamping and fixing the turbine blade blank; and the five-axis machine tool 400 establishes a measurement coordinate system based on the installation reference of the quick-change pallet 200, so as to measure the turbine blade blank through the measurement coordinate system, and then divide The XYZ coordinate values ​​of the blade tip cross-sectional area stacking center, the XYZ coordinate values ​​of the blade root cross-sectional area stacking center, the tip cross-sectional torsion angle, and the root cross-sectional torsion angle are obtained respectively, and then the X-direction deviation value, Y-direction deviation value, and torsion angle deviation value of the blade tip cross-sectional area stacking center and the blade root cross-sectional area stacking center are obtained in sequence, thereby obtaining the X-direction deviation mean Dx, Y-direction inclination angle β, and torsion angle deviation mean Dα of the turbine blade blank. Since the stacking center of the turbine blade blank coincides with the center of the quick-change pallet 200, the measurement is established with the installation reference of the quick-change pallet 200. The coordinate system is used to measure the coordinates to eliminate the installation error of the turbine blade blank; according to the X-direction deviation mean Dx, the Y-direction deviation mean Dy, the Y-direction tilt angle β, and the torsion angle deviation mean Dα of the turbine blade blank, the posture of the to-be-machined surface in different directions of the turbine blade blank is adjusted during machining, so that the measurement coordinate system of the to-be-machined surface of the turbine blade blank and the machining coordinate system of the five-axis machine tool 400 are overlapped to the greatest extent, so as to eliminate the machining error caused by the poor consistency of the turbine blade blank as much as possible, realize the accurate positioning of the turbine blade blank, and then the turbine blade blank is adjusted. The surface to be machined of the blank is precisely machined to improve the qualified rate of the finished turbine blade product; this solution eliminates the installation error of the turbine blade blank before machining, and then adjusts the machining posture of the turbine blade blank based on the measured and converted X-direction deviation mean Dx, Y-direction deviation mean Dy, Y-direction tilt angle β, and torsion angle deviation mean Dα of the turbine blade blank, eliminating the machining error caused by the poor consistency of the turbine blade blank, so as to improve the qualified rate of the finished turbine blade product when the turbine blade blank is subjected to batch automated machining. It is highly practical and suitable for wide promotion and application. Optionally, the five-axis machine tool 400 establishes a measurement coordinate system through a three-dimensional coordinate measuring machine to measure the turbine blade blank. It should be understood that the specific structures of the quick-change pallet 200, the quick-change chuck 300, the fixture 100, the three-dimensional coordinate measuring machine, and the five-axis machine tool 400 are well-known technologies for those skilled in the art and will not be described in detail here. Optionally, the specific steps for making the stacking center of the turbine blade blank coincide with the center of the quick-change pallet 200 are as follows: using the quick-change pallet 200 as a reference, align the profile positioning surface of the fixture 100 (the positioning profile of the fixture 100 is consistent with the profile of the turbine blade blank), and then connect the fixture 100 and the pallet with screws and pins.The overlap center of the mold area of ​​the fixture 100 and the center of the pallet are allowed to have a deviation within 0.5 mm, and this deviation can be corrected by subsequent posture adjustment.

[0032] like Figure 2 As shown, in this embodiment, the five-axis machine tool 400 includes a first rotary axis 420, whose axial centerline coincides with the X-axis of the measurement coordinate system and the X-axis of the machining coordinate system, respectively. A second rotary axis 430, whose axial centerline coincides with the center of the quick-change pallet 200, the stacking center of the turbine blade blanks, the Z-axis of the measurement coordinate system, and the Y-axis of the machining coordinate system, respectively. Specifically, the first and second rotary axes 420, 430 rotate to adjust the machining posture of the turbine blade blank's machined surface, eliminating machining errors caused by poor turbine blade blank consistency.

[0033] like Figure 3 As shown, in this embodiment, in step S3, when the five-axis machine tool 400 processes the surface to be machined on the turbine blade blank that is parallel to or coincides with the YOZ plane of the measurement coordinate system, the first rotary axis 420 rotates 90° and the second rotary axis 430 rotates 90°±Dα to eliminate the torsion angle deviation and make the surface to be machined coincide with the YOZ plane of the machining coordinate system, and the machining position offset of the surface to be machined on the X-axis of the machining coordinate system is Dx. It should be understood that the Y direction of the machining coordinate system of the five-axis machine tool 400 is the height direction, and during actual machining, the tool is fed vertically downward in the height direction. Specifically, the first rotary axis 420 is rotated 90° to coincide with the XOY plane of the machining coordinate system, and the second rotary axis 430 is rotated 90°±Dα to coincide with the YOZ plane of the machining coordinate system and face upward, and the machining position of the machining surface on the X-axis of the machining coordinate system is offset by Dx, thereby eliminating machining errors caused by poor consistency of the turbine blade blank in the machining surface that is parallel to or coincides with the YOZ plane of the measurement coordinate system. It should be understood that the X-direction of the turbine blade blank refers to the direction of translation along the X-axis of the turbine blade blank in the machining surface that is parallel to or coincides with the YOZ plane of the measurement coordinate system.

[0034] like Figure 4As shown, in this embodiment, in step S3, when the five-axis machine tool 400 processes the surface to be machined on the turbine blade blank that is parallel to or coincides with the XOZ plane of the measurement coordinate system, the first rotary axis 420 rotates 90°±β, and the second rotary axis 430 rotates 90°±Dα to eliminate the torsion angle deviation and the Y-direction inclination angle, so that the surface to be machined and the YOZ plane of the machining coordinate system coincide with each other, and the machining position offset of the surface to be machined on the Y axis of the machining coordinate system is Dy1, and the machining position offset of the surface to be machined on the Z axis of the machining coordinate system is Dz, wherein Dy1=L×sinβ, Dz=L1×(1-cosβ), and L is the Z coordinate difference between the rotation center of the first rotary axis 420 and the surface to be machined in the measurement coordinate system. Specifically, the first rotary axis 420 is rotated 90°±β to coincide with the XOY plane of the machining coordinate system, and the second rotary axis 430 is rotated 90°±Dα to coincide with the YOZ plane of the machining coordinate system and face upward, and the machining position of the machining surface on the Y axis of the machining coordinate system is offset by Dy1, and the machining position of the machining surface on the Z axis of the machining coordinate system is offset by Dz, thereby eliminating machining errors caused by poor consistency of the turbine blade blank that are parallel to or coincide with the XOZ plane of the measurement coordinate system. It should be understood that the Y direction of the turbine blade blank refers to the direction of translation along the Y axis of the turbine blade blank that is parallel to or coincides with the XOZ plane of the measurement coordinate system.

[0035] like Figure 5 As shown, in this embodiment, in step S3, when the five-axis machine tool 400 processes the surface to be machined on the turbine blade blank that is parallel to or coincides with the XOY plane of the measurement coordinate system, the first rotary axis 420 rotates ±β, and the second rotary axis 430 rotates ±Dα to eliminate the torsion angle deviation and the Y-direction inclination angle, so that the surface to be machined and the YOZ plane of the machining coordinate system coincide with each other, and the machining position offset of the surface to be machined on the Y-axis of the machining coordinate system is Dy, wherein Dy=L×(1-cosβ), and L is the coordinate difference between the rotation center of the first rotary axis 420 and the surface to be machined on the Z-axis of the measurement coordinate system. Specifically, by rotating the first rotary axis 420 by ±β and the second rotary axis 430 by ±Dα, the surface to be machined is aligned with the YOZ plane of the machining coordinate system, and the machining position of the surface to be machined on the Y axis of the machining coordinate system is offset by Dy. This eliminates machining errors caused by poor consistency of the turbine blade blank due to the surface to be machined being parallel to or coinciding with the XOY plane of the measurement coordinate system. It should be understood that the Z direction of the turbine blade blank refers to the direction of translation along the Z axis of the surface to be machined that is parallel to or coinciding with the XOY plane of the measurement coordinate system.

[0036] like Figure 6As shown, in this embodiment, in step S3, when the five-axis machine tool 400 processes the surface to be machined on the turbine blade blank that is tilted at an angle θ in the X direction in the measurement coordinate system, the first rotary axis 420 rotates by θ and the second rotary axis 430 rotates by ±Dα to eliminate the torsion angle deviation and the X-direction tilt angle, so that the surface to be machined and the YOZ plane of the machining coordinate system coincide with each other, and the machining position of the surface to be machined on the Y axis of the machining coordinate system is Y1, and the machining position of the surface to be machined on the Z axis of the machining coordinate system is Z1, where Y1 = L × sinθ - Dx × cosθ, and Z1 = L × cosθ + Dx × sinθ, where L is the coordinate difference between the rotation center of the first rotary axis 420 and the surface to be machined on the Z axis of the measurement coordinate system. It should be understood that the tilt angle θ in the X direction refers to the rotation angle θ around the X axis of the machining surface of the turbine blade blank that is parallel to or coincides with the XOZ plane of the measurement coordinate system. Specifically, the first rotary axis 420 is rotated by θ and the second rotary axis 430 is rotated by ±Dα, so that the surface to be machined and the YOZ plane of the machining coordinate system coincide with each other, and then the machining position of the surface to be machined on the Y axis of the machining coordinate system is adjusted to Y1, and the machining position of the surface to be machined on the Z axis of the machining coordinate system is adjusted to Z1, so as to eliminate the machining error caused by the poor consistency of the turbine blade blank on the surface to be machined that is inclined at an angle θ in the X direction in the measuring coordinate system.

[0037] like Figure 7 As shown, in this embodiment, in step S3, when the five-axis machine tool 400 processes the surface to be machined on the turbine blade blank with an inclination angle of θ in the Y direction in the measuring coordinate system, the first rotary axis 420 rotates θ±β, and the second rotary axis 430 rotates ±Dα to eliminate the torsion angle deviation and the Y-direction inclination angle, so that the surface to be machined and the YOZ plane of the machining coordinate system coincide with each other, and the machining position of the surface to be machined on the Y axis of the machining coordinate system is Y2, and the machining position of the surface to be machined on the Z axis of the machining coordinate system is Z2, wherein Y2=L×sin(θ+β)-Dy×cos(θ+β), Z2=L×cos(θ+β)+Dy×sin(θ+β), and L is the coordinate difference between the rotation center of the first rotary axis 420 and the surface to be machined on the Z axis of the measuring coordinate system. It should be understood that the Y-axis tilt angle θ refers to the rotation angle θ around the Y axis of the machining surface of the turbine blade blank that is parallel to or coincides with the YOZ plane of the measurement coordinate system. Specifically, by rotating the first rotary axis 420 by θ±β and the second rotary axis 430 by ±Dα, the machining surface and the YOZ plane of the machining coordinate system are made to coincide with each other. Then, by adjusting the machining position of the machining surface on the Y axis of the machining coordinate system to Y2 and the machining position of the machining surface on the Z axis of the machining coordinate system to Z2, machining errors caused by poor consistency of the turbine blade blank are eliminated for the machining surface on the turbine blade blank that is tilted by the angle θ in the Y direction of the measurement coordinate system.

[0038] like Figure 5 As shown, in this embodiment, in step S2, the calculation formula of the Y-direction tilt angle β is: Among them, T is the difference between the Y-direction deviation value of the blade tip cross-sectional area stacking center and the Y-direction deviation value of the blade root cross-sectional area stacking center, and K is the difference between the Z-axis coordinate value of the blade tip cross-sectional area stacking center and the Z-axis coordinate value of the blade tip cross-sectional area stacking center.

[0039] like Figure 2 As shown, in this embodiment, the clamping of the turbine blade blank on the fixture 100 having the quick-change pallet 200 in step S1 specifically includes the following steps: the fixture 100 clamps the turbine blade blank using the airfoil profile of the turbine blade blank as a positioning reference, and arranges the root of the turbine blade blank upward, exposing the root cross-section of the turbine blade blank; then, a measuring slot is provided on the fixture 100 to expose the tip cross-section of the turbine blade blank; and finally, the fixture 100 is mounted on the quick-change pallet 200. Specifically, by clamping the turbine blade blank using the airfoil profile of the turbine blade blank as a positioning reference, machining errors of the turbine blade tenons caused by reference conversion are eliminated; the root of the turbine blade blank is arranged upward, exposing the root cross-section of the turbine blade blank; then, a measuring slot is provided on the fixture 100 to expose the tip cross-section of the turbine blade blank, so as to facilitate measurement of the blade tip cross-section and the blade root cross-section on a three-dimensional coordinate measuring machine.

[0040] like Figure 2 As shown, the turbine blade attitude adjustment processing device of this embodiment adopts the above-mentioned turbine blade attitude adjustment processing method to process the turbine blade blank. The turbine blade attitude adjustment processing device includes a fixture 100 for clamping the turbine blade blank, a quick-change pallet 200 supporting the fixture 100, a quick-change chuck 300 clamping the quick-change pallet 200, and a five-axis machine tool 400 supporting the quick-change chuck 300. Specifically, the turbine blade blank is clamped by the fixture 100, and then the fixture 100 is installed by the quick-change pallet 200, and the quick-change pallet 200 is installed by the quick-change chuck 300, so that the fixture 100 is reliably installed on the turntable 410 of the five-axis machine tool 400, and then the above-mentioned turbine blade attitude adjustment processing method is adopted to process the turbine blade blank, thereby realizing batch automated processing of turbine blade blanks and improving the qualified rate of finished turbine blade products. It has strong practicality and is suitable for wide promotion and application.

[0041] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A turbine blade posture adjustment processing method, characterized in that: The following steps are involved: S1, clamping a turbine blade blank on a fixture (100) having a quick-change tray (200), and making the stacking center of the turbine blade blank coincide with the center of the circle of the quick-change tray (200), and then installing the quick-change tray (200) on a turntable (410) of a five-axis machine tool (400) having a quick-change chuck (300); S2, the five-axis machine tool (400) establishes a measurement coordinate system based on the installation reference of the quick-change pallet (200), and measures the turbine blade blank through the measurement coordinate system, thereby respectively obtaining the XYZ coordinate values ​​of the blade tip cross-sectional area stacking center, the XYZ coordinate values ​​of the blade root cross-sectional area stacking center, the tip cross-sectional torsion angle, and the root cross-sectional torsion angle, and then sequentially obtaining the X-direction deviation value, Y-direction deviation value, and torsion angle deviation value of the blade tip cross-sectional area stacking center and the blade root cross-sectional area stacking center, thereby obtaining the X-direction deviation mean Dx, the Y-direction tilt angle β, and the torsion angle deviation mean Dα of the turbine blade blank; S3, according to the X-direction deviation mean value Dx, the Y-direction deviation mean value Dy, the Y-direction tilt angle β, and the torsion angle deviation mean value Dα of the turbine blade blank, adjusting the posture of the surface to be machined in different directions of the turbine blade blank during machining, so that the measurement coordinate system of the surface to be machined of the turbine blade blank and the machining coordinate system of the five-axis machine tool (400) coincide with each other, and then machining the surface to be machined of the turbine blade blank.

2. The turbine blade posture adjustment processing method according to claim 1, characterized in that: The five-axis machine tool (400) comprises a first rotary axis (420) whose axial centerline coincides with the X-axis of the measurement coordinate system and the X-axis of the machining coordinate system, and a second rotary axis (430) whose axial centerline coincides with the center of a quick-change pallet (200), the stacking center of the turbine blade blank, the Z-axis of the measurement coordinate system, and the Y-axis of the machining coordinate system.

3. The turbine blade posture adjustment processing method according to claim 2, characterized in that: In step S3, when the five-axis machine tool (400) processes a surface to be processed on a turbine blade blank that is parallel to or coincides with the YOZ plane of the measurement coordinate system, the first rotary axis (420) rotates 90° and the second rotary axis (430) rotates 90°±Dα to eliminate the torsion angle deviation and make the surface to be processed coincide with the YOZ plane of the machining coordinate system, and the machining position offset of the surface to be processed on the X-axis of the machining coordinate system is Dx.

4. The turbine blade posture adjustment processing method according to claim 2, characterized in that: In step S3, when the five-axis machine tool (400) processes a surface to be machined on a turbine blade blank that is parallel to or coincides with the XOZ plane of the measurement coordinate system, the first rotary axis (420) rotates 90°±β, and the second rotary axis (430) rotates 90°±Dα to eliminate the torsion angle deviation and the Y-direction tilt angle, so that the surface to be machined and the YOZ plane of the machining coordinate system coincide with each other, and the machining position offset of the surface to be machined on the Y axis of the machining coordinate system is Dy1, and the machining position offset of the surface to be machined on the Z axis of the machining coordinate system is Dz, wherein Dy1=L×sinβ, Dz=L1×(1-cosβ), and L is the Z coordinate difference between the rotation center of the first rotary axis (420) and the surface to be machined in the measurement coordinate system.

5. The turbine blade posture adjustment processing method according to claim 2, characterized in that: In step S3, when the five-axis machine tool (400) processes a surface to be processed on a turbine blade blank that is parallel to or coincides with the XOY plane of the measurement coordinate system, the first rotary axis (420) rotates ±β and the second rotary axis (430) rotates ±Dα to eliminate the torsion angle deviation and the Y-direction tilt angle, so that the surface to be processed and the YOZ plane of the processing coordinate system coincide with each other, and the processing position offset of the surface to be processed on the Y axis of the processing coordinate system is Dy, wherein Dy=L×(1-cosβ), and L is the coordinate difference between the rotation center of the first rotary axis (420) and the surface to be processed on the Z axis of the measurement coordinate system.

6. The turbine blade posture adjustment processing method according to claim 2, characterized in that: In step S3, when the five-axis machine tool (400) processes a surface to be machined on a turbine blade blank with an inclination angle of θ in the X direction in the measurement coordinate system, the first rotary axis (420) rotates by θ and the second rotary axis (430) rotates by ±Dα to eliminate the torsion angle deviation and the inclination angle in the X direction, so that the surface to be machined and the YOZ plane of the machining coordinate system coincide with each other, and the machining position of the surface to be machined on the Y axis of the machining coordinate system is Y1, and the machining position of the surface to be machined on the Z axis of the machining coordinate system is Z1, wherein Y1=L×sinθ-Dx×cosθ, Z1=L×cosθ+Dx×sinθ, and L is the coordinate difference between the rotation center of the first rotary axis (420) and the surface to be machined on the Z axis of the measurement coordinate system.

7. The turbine blade posture adjustment processing method according to claim 2, characterized in that: In step S3, when the five-axis machine tool (400) processes a surface to be machined on a turbine blade blank with an inclination angle of θ in the Y direction in the measurement coordinate system, the first rotary axis (420) rotates θ±β, and the second rotary axis (430) rotates ±Dα to eliminate the torsion angle deviation and the Y direction inclination angle, so that the surface to be machined and the YOZ plane of the machining coordinate system coincide with each other, and the machining position of the surface to be machined on the Y axis of the machining coordinate system is Y2, and the machining position of the surface to be machined on the Z axis of the machining coordinate system is Z2, wherein Y2=L×sin(θ+β)-Dy×cos(θ+β), Z2=L×cos(θ+β)+Dy×sin(θ+β), and L is the coordinate difference between the rotation center of the first rotary axis (420) and the surface to be machined on the Z axis of the measurement coordinate system.

8. The turbine blade attitude adjustment processing method according to any one of claims 1 to 7, characterized in that: In step S2, the calculation formula of the Y-direction tilt angle β is: Among them, T is the difference between the Y-direction deviation value of the blade tip cross-sectional area stacking center and the Y-direction deviation value of the blade root cross-sectional area stacking center, and K is the difference between the Z-axis coordinate value of the blade tip cross-sectional area stacking center and the Z-axis coordinate value of the blade tip cross-sectional area stacking center.

9. The turbine blade attitude adjustment processing method according to any one of claims 1 to 7, characterized in that: In step S1, clamping the turbine blade blank on a fixture (100) having a quick-change tray (200) specifically includes the following steps: The fixture (100) clamps the turbine blade blank using the blade body profile of the turbine blade blank as a positioning reference, and arranges the blade root of the turbine blade blank upward, exposing the blade root cross section of the turbine blade blank. Then, a measuring groove is provided on the fixture (100) to expose the blade tip cross section of the turbine blade blank. Finally, the fixture (100) body is installed on the quick-change tray (200).

10. A turbine blade attitude adjustment processing device, characterized in that: The turbine blade attitude adjustment processing method according to any one of claims 1 to 9 is adopted for processing, and the turbine blade attitude adjustment processing device includes a fixture (100) for clamping the turbine blade blank, a quick-change pallet (200) supporting the fixture (100), a quick-change chuck (300) clamping the quick-change pallet (200), and a five-axis machine tool (400) supporting the quick-change chuck (300).

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