Six-point positioning pose adaptive adjustment method for aviation blades and machining machine tools

Abstract

The present invention provides a six-point positioning pose adaptive adjustment method and a processing machine tool for aviation blades, which relates to the technical field of numerical control machine tool processing. Based on the characteristics of the shape of aviation blades, a laser processing positioning method is proposed to improve the processing accuracy and quality of aviation blades. The method includes: Step S1, adjusting the positions of two preset points P1 and P2 on the suction surface of the blade so that the connection line of the projections of P1 and P2 on the XOY plane is parallel or coincident with the Y axis; Step S2, adjusting the positions of two preset points P3 and P4 on the pressure surface of the blade so that the connection line of the projections of P3 and P4 on the YOZ plane is parallel or coincident with the Y axis; Step S3, adjusting the P5 point near the trailing edge of the pressure surface so that the difference between the P5 point and the ideal Z coordinate value is 0; Step S4, rotating the blade 90° so that the tenon position is at the bottom and the blade body position is at the top; Step S5, detecting the preset point P6 on the end wall, detecting the actual position of the P6 point and then compensating in the program.

Description

Technical Field

[0001] The present invention relates to the technical field of numerical control machine tool processing, and in particular to a method for adaptively adjusting the six-point positioning posture of an aviation blade and a processing machine tool. Background Art

[0002] With the rapid development of China's aerospace industry, the status of aero-engines has become increasingly important. Therefore, higher requirements are put forward for the manufacturing or repair accuracy of aero-engine blades. Laser processing technology has been widely used in the digital manufacturing and repair of aero-engine components due to its advantages such as concentrated heat, fast heating and cooling, and small heat-affected zone. And the high or low laser processing positioning accuracy is a major guarantee for the processing accuracy and repair quality of aero-engine blades. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for adaptively adjusting the six-point positioning posture of an aviation blade and a processing machine tool. Based on the characteristics of the shape of the aviation blade, a method for laser processing positioning is proposed to improve the processing accuracy of the aviation blade and the quality of the aviation blade. The many technical effects that can be produced by the preferred technical solutions among the many technical solutions provided by the present invention are described in detail below.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A method for adaptively adjusting the six-point positioning posture of an aviation blade provided by the present invention includes the following contents: Step S1, adjust the positions of two preset points P1 and P2 on the suction surface of the blade so that the connection line of the projections of P1 and P2 on the XOY plane is parallel or coincident with the Y-axis. Among them, the P1 point and the P2 point are in the direction from the blade tip to the blade tail, and the tenon position is at the back and the blade body position is at the front; Step S2, adjust the positions of two preset points P3 and P4 on the pressure surface of the blade so that the connection line of the projections of P3 and P4 on the YOZ plane is parallel or coincident with the Y-axis. Among them, the P3 point and the P4 point are in the direction from the blade tip to the blade tail; Step S3, adjust the P5 point near the trailing edge of the pressure surface so that the difference between the P5 point and the preset ideal Z coordinate value is 0; Step S4, rotate the blade so that the tenon position is at the bottom and the blade body position is at the top; Step S5, detect the preset point P6 on the end wall, and calculate the Z-axis coordinate of P6 to compensate or adjust the height value of P6 in the program.

[0006] Further, in the step S1, it specifically includes: judging whether the connection line of the projections of the P1 and P2 points on the XOY plane is parallel or coincident with the Y-axis; if so, execute step S2; if not, control the working turntable to move and drive the blade to rotate until the connection line of the projections of the P1 and P2 points on the XOY plane is parallel or coincident with the Y-axis.

[0007] Further, in the step S2, it specifically includes: rotating the fixture through the fixture rotation structure, and detecting two preset points P3 and P4 on the pressure surface of the blade; judging whether the connection line of the projections of the two preset points P3 and P4 on the pressure surface of the blade on the YOZ plane is parallel to or coincides with the Y-axis; if so, execute step S3; if not, the cradle structure acts to drive the blade to swing until the connection line of the projections of the two preset points P3 and P4 on the pressure surface of the blade on the YOZ plane is parallel to or coincides with the Y-axis.

[0008] Further, in the step S3, it specifically includes: judging whether the difference between the P5 point near the trailing edge of the blade on the pressure surface and the preset ideal Z coordinate value is 0; if so, execute step S4; if not, rotate the fixture rotation structure to make the difference between the P5 near the trailing edge of the blade on the pressure surface and the preset ideal Z coordinate value be 0.

[0009] Further, in the step S5, judge whether the distance between the preset point P6 on the end wall and the laser is within the set range; if so, prompt that the blade pose adjustment is completed; if not, move the laser in the height direction to make the distance between the preset point P6 and the laser within the set range.

[0010] The present invention provides a processing machine tool for implementing the six-point positioning pose adaptive adjustment method of the aviation blade, including a machine body, a Y-direction moving assembly, an X-direction moving assembly, a working turntable, a cradle structure, a fixture rotation structure, a fixture, a Z-direction moving assembly, a laser and a measuring head. Among them, the Y-direction moving assembly is installed on the machine body, the X-direction moving assembly is arranged on the Y-direction moving assembly, the working turntable is arranged on the X-direction moving assembly, the cradle structure is arranged on the working turntable, the fixture rotation structure is arranged on the cradle structure, the fixture rotation structure is connected to the fixture, the laser and the measuring head are arranged above the fixture, and the laser and the measuring head are connected to the machine body through the Z-direction moving assembly.

[0011] Further, the Y-direction moving assembly, the X-direction moving assembly and the Z-direction moving assembly all include screw mechanisms.

[0012] Further, the processing machine tool further includes an ultrasonic loader, and the ultrasonic loader is arranged on the fixture rotation structure.

[0013] The preferred technical solution of the present invention can at least produce the following technical effects: The present invention provides a method for adaptively adjusting the six-point positioning pose of an aviation blade. The aviation blade is installed on the fixture of a machine tool, and six points P1, P2, P3, P4, P5, and P6 on the blade are identified by a standard measuring ball, and the positional relationship of the six points is adjusted to adjust the actual position of the aviation blade to the expected position (that is, to make the actual coordinate system of the aviation blade coincide with the expected coordinate system), so as to improve the machining accuracy of the aviation blade and improve the quality of the aviation blade. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 is a flowchart of a method for adaptively adjusting the six-point positioning pose of an aviation blade shown according to an exemplary embodiment;

[0016] Figure 2 is a schematic diagram of an aviation blade;

[0017] Figure 3 is a schematic structural diagram of a processing machine tool;

[0018] Figure 4 is Figure 3 a partial enlarged view of part A in

[0019] In the figure, 1 is the bed body; 2 is the Y-direction moving assembly; 3 is the X-direction moving assembly; 4 is the working turntable; 5 is the cradle structure; 6 is the fixture rotating structure; 7 is the fixture; 8 is the Z-direction moving assembly; 9 is the laser; 10 is the measuring head; 11 is the Z-axis column; 12 is the blade body; 13 is the end wall; 14 is the tenon; 15 is the suction surface; 16 is the pressure surface; 17 is the blade trailing edge. Detailed Embodiments

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0021] See Figure 2, showing the structural schematic diagram of an existing aviation blade. The aviation blade includes a blade body 12, a tip wall 13, and a tenon 14. The tenon 14, the tip wall 13, and the blade body 12 are connected in sequence. The two sides of the blade body 12 are respectively a suction surface 15 and a pressure surface 16. One end of the blade body 12 connected to the tip wall 13 is the blade trailing edge, and one end of the blade body 12 far from the tip wall 13 is called the blade tip. Figure 2 The right side of the blade body 12 in the middle is called the blade trailing edge.

[0022] Based on the characteristics of the shape of the aviation blade, the present invention provides a six-point positioning pose adaptive adjustment method for the aviation blade to improve the machining accuracy of the aviation blade and improve the quality of the aviation blade. See Figure 1 , and the specific method includes the following content:

[0023] Step S1: Adjust the positions of two preset points P1 and P2 on the suction surface 15 of the blade so that the connection line of the projections of points P1 and P2 on the XOY plane is parallel or coincident with the Y-axis. Among them, points P1 and P2 are in the direction from the blade tip to the blade trailing edge, and the blade clamped on the machine tool has the tenon 14 at the rear and the blade body 12 at the front.

[0024] Step S2: Adjust the positions between two preset points P3 and P4 on the pressure surface of the blade so that the connection line of the projections of points P3 and P4 on the YOZ plane is parallel or coincident with the Y-axis. Among them, points P3 and P4 are in the direction from the blade tip to the blade trailing edge.

[0025] Step S3: Adjust point P5 near the blade trailing edge on the pressure surface so that the difference between P5 and the preset ideal Z coordinate value is 0.

[0026] Step S4: Rotate the blade (preferably 90°) so that the tenon 14 is at the bottom and the blade body 12 is at the top.

[0027] Step S5: Detect the preset point P6 on the tip wall, and calculate the Z-axis coordinate of P6 to compensate or adjust the height value of P6 in the program.

[0028] See Figure 2 , showing six points P1, P2, P3, P4, P5, and P6. Install the aviation blade on the fixture of the machine tool, accurately position the six points P1, P2, P3, P4, P5, and P6 on the blade through the measuring head 10 (measuring ball), and adjust the positional relationship of the six points to adjust the actual position of the aviation blade to the expected position (that is, to make the actual coordinate system of the aviation blade coincide with the expected coordinate system).

[0029] When adopting the adjustment method provided by the present invention, first clamp the aviation blade on the laser processing machine tool, and adjust the fixture to the pre-positioning position, and make the tenon 14 at the rear and the blade body 12 at the front. See Figure 4 .

[0030] In step S1, specifically, it includes: determining whether the connection line of the projections of points P1 and P2 on the XOY plane is parallel to or coincides with the Y-axis; if so, execute step S2; if not, control the working turntable 4 to move, driving the blade to rotate until the connection line of the projections of points P1 and P2 on the XOY plane is parallel to or coincides with the Y-axis.

[0031] The preset points P1 and P2 are two points far from the trailing edge 17 of the blade, and the directions of points P1 and P2 are from the blade tip to the blade tail. Regarding the XYZ directions, the horizontal direction along the left and right is defined as the X direction, the horizontal direction along the front and back is defined as the Y direction, and the vertical direction of up and down is defined as the Z direction.

[0032] In step S2, specifically, it includes: rotating the fixture through the fixture rotation structure, and detecting two preset points P3 and P4 on the pressure surface of the blade; determining whether the connection line of the projections of the two preset points P3 and P4 on the pressure surface of the blade on the YOZ plane is parallel to or coincides with the Y-axis; if so, execute step S3; if not, the cradle structure 5 moves to drive the blade to swing until the connection line of the projections of the two preset points P3 and P4 on the pressure surface of the blade on the YOZ plane is parallel to or coincides with the Y-axis.

[0033] The preset points P3 and P4 are on the side of the pressure surface 16, and are two points far from the trailing edge 17 of the blade, and the directions of points P3 and P4 are from the blade tip to the blade tail.

[0034] In step S3, specifically, it includes: determining whether the difference between P5 near the trailing edge of the pressure surface and the preset ideal Z coordinate value is 0; if so, execute step S4; if not, rotate the fixture rotation structure so that the difference between P5 near the trailing edge of the pressure surface and the preset ideal Z coordinate value is 0.

[0035] The measuring ball can directly measure the Z-axis coordinate of point P5. If there is a difference compared with the ideal coordinate, rotate the fixture rotation structure to adjust the Z-axis coordinate of point P5 until the difference from the ideal Z coordinate value is zero.

[0036] In step S5, specifically, it includes: detecting the preset point P6 on the end wall and calculating the Z-axis coordinate of P6. Measure the distance between the actual point P6 and the zero point through the detection ball. If it is higher, the measurement is positive, and if it is lower, the measurement is negative in the same way, and both need to be compensated in the program.

[0037] Regarding step S5, specifically, it can also be as follows: determining whether the distance between the preset point P6 on the end wall 13 and the laser 9 is within the set range; if so, prompt that the blade pose adjustment is completed; if not, move the laser 9 in the height direction so that the distance between the preset point P6 and the laser 9 is within the set range.

[0038] See Figure 3, a processing machine tool for implementing the above six-point positioning pose adaptive adjustment method of the aviation blade, comprising a bed 1, a Y-direction moving assembly 2, an X-direction moving assembly 3, a working turntable 4, a cradle structure 5, a fixture rotation structure 6, a fixture 7, a Z-direction moving assembly 8, a laser 9 and a measuring head 10. Among them, the Y-direction moving assembly 2 is installed on the bed 1, the X-direction moving assembly 3 is arranged on the Y-direction moving assembly 2, the working turntable 4 is arranged on the X-direction moving assembly 3, the cradle structure 5 is arranged on the working turntable 4, the fixture rotation structure 6 is arranged on the cradle structure 5, the fixture rotation structure 6 is connected to the fixture 7, the laser 9 and the measuring head 10 are arranged above the fixture 7, and the laser 9 and the measuring head 10 are connected to the bed 1 through the Z-direction moving assembly 8.

[0039] The Y-direction moving assembly 2, the X-direction moving assembly 3 and the Z-direction moving assembly 8 have the same structural principle, all of which include a lead screw mechanism and are all prior arts. Taking the Y-direction moving assembly 2 as an example, the specific description is as follows: Refer to Figure 3 , the Y-direction moving assembly 2 includes a driving motor, a lead screw mechanism and a slide rail structure. The driving motor is connected to the lead screw of the lead screw mechanism (the extending direction of the lead screw of the lead screw mechanism is the Y direction). The slider of the lead screw mechanism is connected to the slider of the slide rail structure, and the slider of the lead screw mechanism is connected to the X-direction moving assembly 3 (the support table of the X-direction moving assembly 3). When the driving motor operates, it can drive the X-direction moving assembly 3 to move along the Y direction.

[0040] Similarly, the X-direction moving assembly 3 can drive the working turntable 4 to move along the X direction. The X direction is perpendicular to the Y direction. The Z-direction moving assembly 8 can drive the laser 9 and the measuring head 10 to move along the height direction.

[0041] Regarding the working turntable 4, it can drive the cradle structure 5 to rotate in the horizontal direction. The working turntable 4 can adopt the prior art; the cradle structure 5 can drive the fixture rotation structure 6 and the fixture 7 to swing. The cradle structure 5 can adopt the prior art; regarding the fixture rotation structure 6, it can drive the fixture 7 and the blade on the fixture 7 to rotate and can adopt the prior art.

[0042] The processing machine tool further includes an ultrasonic loader, and the ultrasonic loader is arranged on the fixture rotation structure 7. The ultrasonic loader realizes ultrasonic vibration-assisted grinding to improve the processing quality.

[0043] In the description of the present invention, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0044] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "an example" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0046] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. An adaptive adjustment method for the six - point positioning pose of an aviation blade, characterized in that, It includes the following contents: Step S1: Adjust the positions of two preset points P1 and P2 on the suction surface of the blade so that the connection line of the projections of P1 and P2 on the XOY plane is parallel or coincident with the Y-axis. Herein, P1 and P2 are in the direction from the blade tip to the blade root, with the tenon position at the rear and the blade body position at the front; Step S2: Adjust the positions of two preset points P3 and P4 on the pressure surface of the blade so that the connection line of the projections of P3 and P4 on the YOZ plane is parallel or coincident with the Y-axis. Herein, P3 and P4 are in the direction from the blade tip to the blade root; Step S3: Adjust point P5 on the pressure surface near the trailing edge of the blade so that the difference between point P5 and the preset ideal Z coordinate value is 0; Step S4: Rotate the blade so that the tenon position is at the bottom and the blade body position is at the top; Step S5: Detect the preset point P6 on the end wall and calculate the Z-axis coordinate of P6 to compensate or adjust the height value of P6 in the program.

2. The adaptive adjustment method for the six - point positioning pose of an aviation blade according to claim 1, characterized in that, In the said step S1, it specifically includes: Judge whether the connection line of the projections of P1 and P2 on the XOY plane is parallel or coincident with the Y-axis; If so, execute step S2; If not, control the working turntable to move and drive the blade to rotate until the connection line of the projections of P1 and P2 on the XOY plane is parallel or coincident with the Y-axis.

3. The adaptive adjustment method for the six - point positioning pose of an aviation blade according to claim 1, characterized in that, In the said step S2, it specifically includes: Rotate the fixture through the fixture rotation structure and detect two preset points P3 and P4 on the pressure surface of the blade; Judge whether the connection line of the projections of two preset points P3 and P4 on the pressure surface of the blade on the YOZ plane is parallel or coincident with the Y-axis; If so, execute step S3; If not, the cradle structure moves to drive the blade to swing until the connection line of the projections of two preset points P3 and P4 on the pressure surface of the blade on the YOZ plane is parallel or coincident with the Y-axis.

4. The adaptive adjustment method for the six - point positioning pose of an aviation blade according to claim 1, characterized in that, In the said step S3, it specifically includes: Judge whether the difference between point P5 on the pressure surface near the trailing edge of the blade and the preset ideal Z coordinate value is 0; If so, execute step S4; If not, rotate the fixture rotation structure so that the difference between P5 near the trailing edge of the blade on the pressure surface and the preset ideal Z coordinate value is 0.

5. The adaptive adjustment method for the six - point positioning pose of an aviation blade according to claim 1, characterized in that, In the said step S5, Judge whether the distance between the preset point P6 on the end wall and the laser is within the set range; If so, prompt that the blade pose adjustment is completed; If not, move the laser in the height direction so that the distance between the preset point P6 and the laser is within the set range.

6. A processing machine tool for implementing the adaptive adjustment method for the six - point positioning pose of an aviation blade according to any one of claims 1 - 5, characterized in that, It includes a bed body, a Y-direction moving assembly, an X-direction moving assembly, a working turntable, a cradle structure, a fixture rotation structure, a fixture, a Z-direction moving assembly, a laser and a measuring head. Among them, The Y-direction moving assembly is installed on the bed body, the X-direction moving assembly is arranged on the Y-direction moving assembly, the working turntable is arranged on the X-direction moving assembly, the cradle structure is arranged on the working turntable, the fixture rotation structure is arranged on the cradle structure, the fixture rotation structure is connected to the fixture, the laser and the measuring head are arranged above the fixture, and the laser and the measuring head are connected to the bed body through the Z-direction moving assembly.

7. The processing machine tool according to claim 6, characterized in that, The Y-direction moving assembly, the X-direction moving assembly and the Z-direction moving assembly all include lead screw mechanisms.

8. The processing machine tool according to claim 6, characterized in that, The processing machine tool further includes an ultrasonic loader, and the ultrasonic loader is arranged on the fixture rotating structure.

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