Aero-engine turbine blade quick-change machining adapter disc and method

Abstract

The application provides an aero-engine turbine blade quick-change machining adapter disc and method, and belongs to the field of aero-engine blade machining technology. The adapter disc comprises a square-structure base body, four corners of the base body are provided with chamfers, a positioning hole is arranged at the middle position of the base body, a positioning shaft is connected in the positioning hole, and the positioning shaft is fixedly connected with the base of a turbine blade machining clamp; the positioning shaft is arranged in a stepped shaft structure and comprises a first end portion and a second end portion connected with each other, the diameter of the second end portion is larger than that of the first end portion, the first end portion is connected with the positioning hole, the second end portion is sunk into the base body on one side of the connection with the first end portion, and the second end portion is exposed from the base body on the other side away from the first end portion; a plurality of connecting holes are arranged on the circumferential end face of the second end portion exposed from the base body, one part of the connecting holes is used for positioning and connecting the positioning shaft with the base body, and the other part of the connecting holes is used for positioning and connecting the positioning shaft with the base. Through the processing scheme, the part machining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aircraft engine blade processing, and particularly relates to an aircraft engine turbine blade quick-change processing adapter disc and method. BACKGROUND

[0002] As a key part of an aircraft engine, a turbine blade directly affects the performance and safety of the engine, and the size and quality of the blade are very strictly required. A turbine blade of a certain type of aircraft engine adopts a nickel-based high-temperature alloy investment casting blank, and a complex crown part needs to be machined. The low-pressure turbine blade airfoil surface is super-thin and long and has a difficult-to-machine structure of a special-shaped crown. The special-shaped seal teeth are a circular arc three-tooth thin-wall special-shaped structure, and the minimum thickness of the gill teeth is 1.0 mm. The blade is twisted, and the crown twist angle is 9 degrees. The processing of the special-shaped seal teeth is a typical long, thin-wall, cantilevered part processing. How to realize high-precision, high-efficiency, quick-change processing of the super-thin, long, cantilevered blade special-shaped seal teeth is a technical problem to be solved in the industry. Figure 1 The structure of the special-shaped seal teeth of the turbine blade crown is shown in Figure 2 The technical requirements of the special-shaped seal teeth are shown in The processing of the special-shaped seal teeth of the turbine blade crown is a long, thin-wall, cantilevered part processing, and there are problems of processing vibration and deformation, low product qualification rate, and low processing efficiency. SUMMARY

[0003] Therefore, the present application provides an aircraft engine turbine blade quick-change processing adapter disc and method, which realizes quick installation of a clamp and improves the processing quality and efficiency of the seal teeth.

[0004] In a first aspect, the present application provides an aircraft engine turbine blade quick-change processing adapter disc for connecting a turbine blade processing clamp, the turbine blade processing clamp comprising a base and a blade clamping assembly arranged on the base, and the adapter disc comprising a square structure base body, a positioning hole is arranged at a middle position of the base body, and a positioning shaft is connected in the positioning hole, the positioning shaft being used for fixed connection with the base of the turbine blade processing clamp.

[0005] The positioning shaft is arranged in a stepped shaft structure, the stepped shaft structure comprising a first end portion and a second end portion connected with each other, the diameter of the second end portion being greater than that of the first end portion, the first end portion being in matched connection with the positioning hole, the second end portion being sunk into the base body on one side connected with the first end portion, and the second end portion being exposed from the base body on the other side away from the first end portion; a plurality of connecting holes are arranged on the circumferential end face of the second end portion exposed from the base body, a part of the plurality of connecting holes being used for positioning connection of the positioning shaft with the base body, and another part of the plurality of connecting holes being used for positioning connection of the positioning shaft with the base.

[0006] According to a specific implementation manner of the embodiment of the present application, the plurality of connecting holes include first cylindrical holes and threaded holes arranged on a first circumference of the circumferential end surface, the first cylindrical holes being used for cooperating with cylindrical pins to position the positioning shaft to coincide with the center of the base body, and the threaded holes being used for cooperating with first screws to fix the base on the positioning shaft; the connecting holes further include second cylindrical holes and stepped holes arranged on a second circumference of the circumferential end surface, the second cylindrical holes being used for cooperating with positioning pins to position the positioning shaft to coincide with the center of the base, and the stepped holes being used for cooperating with second screws to fix the positioning shaft on the base body; and the diameter of the first circumference is greater than the diameter of the second circumference.

[0007] According to a specific implementation manner of the embodiment of the present application, the number of the threaded holes is greater than or equal to three, and the threaded holes are uniformly distributed on the first circumference, and / or,

[0008] the number of the stepped holes is greater than or equal to three, and the stepped holes are uniformly distributed on the second circumference.

[0009] According to a specific implementation manner of the embodiment of the present application, the positioning pins are exposed from the circumferential end surface of the positioning shaft by 5-6 mm.

[0010] According to a specific implementation manner of the embodiment of the present application, the diameter of the first circumference is 64 mm, and the diameter of the second circumference is 60 mm.

[0011] According to a specific implementation manner of the embodiment of the present application, the base body is further provided with a plurality of first cylindrical pins and a plurality of second cylindrical pins, the first cylindrical pins are arranged on the left and right sides of the positioning shaft, and the second cylindrical pins are arranged around the base body and are uniformly arranged; the base body is further provided with a plurality of third screws, the third screws are arranged around the base body and are uniformly arranged; the base body is positioned with the machine tool workbench turntable through the first cylindrical pins and the second cylindrical pins, and the base body is fixedly connected with the machine tool workbench turntable through the third screws.

[0012] According to a specific implementation manner of the embodiment of the present application, the diameter of the first end portion is 40 mm, and the diameter of the second end portion is 80 mm.

[0013] According to a specific implementation manner of the embodiment of the present application, the side length of the base body is 530 mm, the thickness is 40 mm, and the material is aluminum alloy 7075.

[0014] In a second aspect, the embodiment of the present application further provides an aero-engine turbine blade quick-change machining method, which utilizes the aero-engine turbine blade quick-change machining adapter disc of any one of the embodiments of the first aspect, and the method comprises:

[0015] The turbine blade is positioned and fixed by using the blade clamping assembly;

[0016] The hole on the base is matched with the second end of the positioning shaft on the base body, and the positioning and fixing are performed by using the connecting piece;

[0017] The first end of the positioning shaft is matched with the positioning hole of the base body, and the positioning and fixing are performed by using the connecting piece;

[0018] The base body is positioned and fixed with the machine tool workbench turntable;

[0019] The diamond roller is fastened with the machine tool spindle, and the grinding wheel mounted on the machine tool spindle is ground;

[0020] The blade crown sealing tooth profile surface, the blade crown air inlet edge end surface and the blade crown air outlet edge end surface are ground by using the ground grinding wheel.

[0021] According to a specific implementation manner of the embodiment of the application, the grinding processing parameters are as follows: the rotating speed of the grinding wheel is 18-24 m / s, and the feeding speed is 80-150 mm / min.

[0022] Advantages

[0023] The aero-engine turbine blade quick-change machining adapter disc in the embodiment of the application mainly comprises a base body, a positioning shaft, a cylindrical pin and a screw, and is used in cooperation with a clamp to make the rotating center of the machined part, the center of the clamp and the center of the machine tool turntable consistent, realize the quick installation of the clamp, and has the advantages of high part machining size precision, intermittent machining without debugging after one-time part clamping and debugging, etc., and improves the machining efficiency. The machining method of the application improves the sealing tooth profile of the blade crown and the qualified rate of the air inlet and air outlet edge end surfaces to 98%, greatly shortens the debugging and machining time (the traditional type changing and debugging machining time is 7-8 hours, and the present debugging and machining time is within 0.5 hours) and the machining cycle (the original machining cycle is 60 days, and the present machining cycle is 30 days), and improves the production efficiency by 50%. The application can be widely applied to the machining of various blades and is suitable for small-batch, single-batch and large-batch production. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 A schematic diagram of a sealing tooth structure of a certain type of turbine blade;

[0026] Figure 2 Technical requirements for a blade crown sealing tooth of a certain type of turbine blade;

[0027] Figure 3 A view in the direction of arrow A; Figure 1

[0028] Figure 4 A view in the direction of arrow B; Figure 1

[0029] Figure 5 A view in the direction of arrow C; Figure 1

[0030] Figure 6 A view in the direction of arrow D;

[0031] Figure 7 A view in the direction of arrow E; Figure 6

[0032] Figure 8 A view in the direction of arrow F; Figure 6

[0033] Figure 9 A view in the direction of arrow G; Figure 8

[0034] Figure 10 A view in the direction of arrow H;

[0035] Figure 11 A view in the direction of arrow I;

[0036] Figure 12 A view in the direction of arrow J; Figure 11

[0037] Figure 13 A view in the direction of arrow K; Figure 11

[0038] Figure 14 A view in the direction of arrow L.

[0039] ​​​​​​​​In the figure: 1, base; 1-1, base and adapter disc connecting hole; 2, support; 3, tooth seat; 3-1, tooth seat 2nd tooth non-working surface; 3-2, tooth seat 2nd tooth working surface; 3-3, tooth seat 5th tooth non-working surface; 3-4, tooth seat 5th tooth working surface; 4, tooth block; 4-1, tooth block 2nd tooth non-working surface; 4-2, tooth block 2nd tooth working surface; 4-3, tooth block 5th tooth non-working surface; 4-4, tooth block 5th tooth working surface; 5, positioning ball; 6, floating support pin; 7, small compression screw; 8, ejector pin; 9, guide support; 9-1, guide support leaf direction positioning surface; 9-2, guide support leaf back direction positioning surface; 10, leaf direction positioning push block; 10-1, leaf direction positioning push block sawtooth surface; 11, leaf back direction compression push block; 11-1, leaf back direction compression push block sawtooth surface; 12, shoulder screw; 13, leaf direction profile guide strip; 14, leaf direction profile movable positioning block; 15, leaf back direction profile guide strip; 16, leaf back direction profile compression block; 17, compression screw; 18, locking nut; 19, leaf back direction compression support; 19-1, leaf back direction compression support plane; 20, shoulder nut; 21, pin; 22, screw; 23, stud; 101, base body; 101-1, positioning hole; 102, positioning shaft; 102-1, first end portion; 103, positioning pin; 104, cylindrical pin; 105, second screw; 106, first cylindrical pin; 107, third screw; 108, second cylindrical pin; 300, diamond roller; 301, shroud sealing gear profile surface; 302, roller left end surface; 303, roller right end surface; 601, tenon tooth 2nd tooth leaf direction non-working surface; 602, tenon tooth 2nd tooth leaf direction working surface; 603, tenon tooth 5th tooth leaf direction non-working surface; 604, tenon tooth 5th tooth leaf direction working surface; 605, tenon tooth 2nd tooth leaf back direction non-working surface; 606, tenon tooth 2nd tooth leaf back direction working surface; 607, tenon tooth 5th tooth leaf back direction non-working surface; 608, tenon tooth 5th tooth leaf back direction working surface; 609, shroud front edge positioning point; 610, leaf tip cross section front edge positioning point; 611, leaf tip cross section leaf direction profile front edge positioning segment; 612, leaf tip cross section leaf direction profile rear edge positioning segment; 613, leaf tip cross section leaf back direction profile rear edge compression segment; 614, leaf tip cross section leaf back direction profile front edge compression segment; 615, shroud direction sawtooth surface; 616, shroud back direction sawtooth surface. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0041] Following, the embodiments of the present application are described through specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and various modifications or changes can be made to the details in the specification based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0042] It should be noted that the various aspects of the embodiments described below are within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings herein one skilled in the art should appreciate that an aspect described herein can be implemented independently of any other aspects and that an aspect can be implemented both as any number of software, firmware, and / or hardware structures.

[0043] It should also be noted that the figures provided in the following embodiments are only schematically illustrating the basic concepts of the present application, and only the components related to the present application are shown in the figures, not drawn according to the number, shape and size of the components in actual implementation, and the shape, number and proportion of each component in actual implementation can be arbitrarily changed, and the layout of the components can be more complex.

[0044] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will understand that the aspects described can be practiced without these specific details.

[0045] In a first aspect, the embodiments of the present application provide an aero-engine turbine blade quick-change machining adapter disc for connecting a turbine blade machining clamp, and the following will be described in detail with reference to Figures 1 to 14 In a first aspect, the embodiments of the present application provide an aero-engine turbine blade quick-change machining adapter disc for connecting a turbine blade machining clamp, and the following will be described in detail with reference to

[0046] The turbine blade machining fixture in the embodiment comprises a base 1 and a blade clamping assembly arranged on the base 1. The blade clamping assembly comprises a support 2 mounted at the lower end of the base 1, a tooth seat 3, a tooth block 4, a stud 23 and a shoulder nut 20 connected together with the support 2, so as to realize positioning and pressing of the blade tenon tooth part. The tenon front edge positioning ball 5 arranged on the fixture base 1 is designed as a ball head positioning structure with the top end as Sφ10, so as to ensure accurate positioning with the part tenon front edge positioning point. The guide support 9 mounted on the upper end of the base 1 comprises a guide support blade basin direction positioning surface 9-1 and a guide support blade back direction positioning surface 9-2, and is designed as a U-shaped structure. A blade tip cross section front edge floating positioning member is mounted in the middle part of the U-shaped structure. The top end of the floating support pin 6 is designed as a cylindrical generatrix positioning structure, so as to ensure accurate and stable positioning of the blade tip front edge. The upper end surface of the U-shaped structure of the guide support 9 is connected with a blade basin direction positioning push block 10 and a blade back direction pressing push block 11 respectively. The top end of the blade basin direction positioning push block 10 and the blade back direction pressing push block 11 is designed as a sawtooth shape consistent with the structure of the part blade crown basin back direction, so as to ensure accurate positioning and reliable pressing of the blade crown sawtooth part. The two sides of the U-shaped structure of the guide support 9 are respectively connected with a blade tip cross section blade basin profile movable positioning block 14 and a blade back profile pressing block 16. The blade basin profile movable positioning block 14 is connected with a blade basin profile guide strip 13, and the blade back profile pressing block 16 is connected with a blade back profile guide strip 15. The blade basin profile movable positioning block 14 is designed as a 5mm long positioning line segment consistent with the front and rear edge contour of the part blade basin profile, so as to improve the positioning accuracy of the part blade tip cross section blade basin profile. The blade back profile pressing block 16 is designed as a 5mm long pressing segment consistent with the front and rear edge contour of the part blade back profile, so as to improve the pressing reliability of the part blade tip cross section blade back profile. The positioning member is made of high wear-resistant material GCr15, so as to ensure the stability of the part positioning.

[0047] The adapter plate in the embodiment comprises a square base body 101, four corners of the base body 101 are provided with chamfers, a positioning hole 101-1 is arranged at a middle position of the base body 101, a positioning shaft 102 is connected in the positioning hole 101-1, and the positioning shaft 102 is used for fixed connection with a base 1 of a turbine blade machining clamp; the positioning shaft 102 is arranged in a stepped shaft structure, the stepped shaft structure comprises a first end portion 102-1 and a second end portion connected with each other, a diameter of the second end portion is greater than that of the first end portion 102-1, the first end portion 102-1 is connected with the positioning hole 101-1 in a matched mode, the second end portion is sunken into the base body 101 at a side connected with the first end portion 102-1, and a side of the second end portion away from the first end portion 102-1 is exposed from the base body 101; a plurality of connecting holes are arranged on a circumferential end face of the side of the second end portion exposed from the base body 101, a part of the connecting holes are used for positioning connection of the positioning shaft 102 and the base body 101, and the other part of the connecting holes are used for positioning connection of the positioning shaft 102 and the base 1.

[0048] Further, the connecting holes comprise first cylindrical holes and threaded holes arranged on a first circumference of the circumferential end face, the first cylindrical holes are used for cooperation with a cylindrical pin 104 to make the positioning shaft 102 coincide with the center of the base body 101 in positioning, and the threaded holes are used for cooperation with a first screw to make the base 1 fixed on the positioning shaft 102; the connecting holes further comprise second cylindrical holes and stepped holes arranged on a second circumference of the circumferential end face, the second cylindrical holes are used for cooperation with a positioning pin 103 to make the positioning shaft 102 coincide with the center of the base 1 in positioning, and the stepped holes are used for cooperation with a second screw 105 to make the positioning shaft 102 fixed on the base body 101; a diameter of the first circumference is greater than that of the second circumference.

[0049] Specifically, the diameter of the first circumference is 64 mm, and the diameter of the second circumference is 60 mm.

[0050] In a specific embodiment, after the blade is positioned and fixed on the clamp, the φ80(+0.03, +0.01) base on the base 1 of the clamp is matched with the φ80(-0.02, -0.05) positioning shaft 102 on the base body 101 of the adapter disc through the adapter disc connecting hole 1-1, the positioning shaft 102 is positioned with the clamp through the φ8(-0.01, -0.02) positioning pin 103 on the upper end of the positioning shaft 102 and the φ8(+0.015, 0) pin 21 on the clamp base 1, and the clamp base 1 is fixed with the positioning shaft 102 of the adapter disc through the screw 22. After the φ40g6 first end 102-1 on the lower end of the positioning shaft 102 is matched with the φ40H7 positioning hole 101-1 in the center of the base body 101, the positioning shaft 102 is positioned with the base body 101 through the cylindrical pin 104, and the positioning shaft 102 is fixed with the base body 101 through the second screw 105. The base body 101 is positioned with the machine tool workbench turntable through the first cylindrical pin 106 and the second cylindrical pin 108, and the adapter disc is fixed with the machine tool workbench turntable through the third screw 107.

[0051] Further, the number of the threaded holes is greater than or equal to three, and the threaded holes are uniformly distributed on the first circumference, and / or,

[0052] The number of the stepped holes is greater than or equal to three, and the stepped holes are uniformly distributed on the second circumference.

[0053] Preferably, the number of the threaded holes is three, and the number of the stepped holes is three.

[0054] In a specific embodiment, the designed slow-feed grinding zero-point positioning device, the positioning shaft 102 is the core component, which is designed as a stepped shaft structure. The large shaft end face (the end face of the second end) of the positioning shaft 102 is matched with the φ8H7 first cylindrical hole on the φ64 circumference and the cylindrical pin 104 for accurate positioning, so that the center of the positioning shaft 102 coincides with the center of the base body 101, and the large shaft end face of the positioning shaft 102 is uniformly distributed with three φ9 / φ15 stepped holes on the φ60 circumference according to 120°, which are matched with the second screw 105 to fix the positioning shaft 102 on the base body 101. The large shaft end face of the positioning shaft 102 is matched with the φ8H7 second cylindrical hole on the φ60 circumference and the positioning pin 103 for accurate positioning, so that the center of the positioning shaft 102 coincides with the center of the clamp, and the clamp is fixed on the positioning shaft 102 through the 3-M10 threaded holes uniformly distributed on the φ64 circumference according to 120° and the first screw.

[0055] In an embodiment, the positioning pin 103 assembled with the clamp on the large shaft end face of the positioning shaft 102 exposes the circumferential end face of the positioning shaft 102 by 5-6 mm, which guarantees the positioning accuracy and connection stability of the clamp and the positioning shaft 102.

[0056] In an embodiment, the small shaft (first end 102-1) of the positioning shaft 102 has a diameter of φ40g6 and matches with the φ40H7 hole of the base body 101 of the adapter disc, the small shaft has a length of 5mm-6mm and matches with the pin hole of φ8, which ensures the positioning accuracy and connection stability of the positioning shaft 102 and the base body 101.

[0057] Further, the base body 101 is further provided with a plurality of first cylindrical pins 106 and a plurality of second cylindrical pins 108, the first cylindrical pins 106 are arranged on the left and right sides of the positioning shaft 102, the second cylindrical pins 108 are arranged around the base body 101 and are uniformly arranged; the base body 101 is further provided with a plurality of third screws 107, the third screws 107 are arranged around the base body 101 and are uniformly arranged; the base body 101 is positioned with the machine tool workbench turntable through the first cylindrical pins 106 and the second cylindrical pins 108, and the base body 101 is fixedly connected with the machine tool workbench turntable through the third screws 107.

[0058] In an embodiment, the diameter of the first end 102-1 is 40mm, and the diameter of the second end is 80mm.

[0059] In an embodiment, the base body 101 has a side length of 530mm and a thickness of 40mm, and is made of aluminum alloy 7075. The base body 101 of the adapter disc has the same size and shape as the workbench turntable of the strong grinder, so that the machining area of the machine tool is not changed, the maximum area machining part is ensured, and the machining capacity of the equipment for the part is not changed.

[0060] In a second aspect, the embodiments of the present application also provide an aero-engine turbine blade quick-change machining method, which utilizes the aero-engine turbine blade quick-change machining adapter disc of any one of the embodiments of the first aspect, and the method comprises:

[0061] Positioning and fixing the turbine blade by using the blade clamping assembly;

[0062] Matching the hole on the base 1 with the second end of the positioning shaft 102 on the base body 101, and positioning and fixing by using the connecting piece;

[0063] Matching the first end 102-1 of the positioning shaft 102 with the positioning hole 101-1 of the base body 101, and positioning and fixing by using the connecting piece;

[0064] Positioning and fixing the base body 101 with the machine tool workbench turntable;

[0065] Tightening the sealing tooth diamond roller with the machine tool spindle, and grinding the grinding wheel mounted on the machine tool spindle;

[0066] The blade is ground by the reconditioned grinding wheel on the blade crown sealing profile, the blade crown air inlet edge end face and the blade crown air outlet edge end face.

[0067] Further, the grinding processing parameters are that the rotating speed of the grinding wheel is 18-24 m / s, and the feeding speed is 80-150 mm / min.

[0068] Specifically, the positioning and fixing of the turbine blade by the blade clamping assembly comprises the following steps: the non-working surface 601 of the part tenon tooth, the working surface 602 of the part tenon tooth, the non-working surface 603 of the part tenon tooth, the working surface 604 of the part tenon tooth are horizontally pushed to respectively abut against the non-working surface 3-1 of the tooth seat of the second tooth, the working surface 3-2 of the tooth seat of the second tooth, the non-working surface 3-3 of the tooth seat of the fifth tooth, the working surface 3-4 of the tooth seat of the fifth tooth in the tooth seat clamp of the sealing tooth, the positioning point 609 of the front edge of the part tenon abuts against the positioning ball 5 on the clamp, and the positioning point 610 of the tip section front edge of the part abuts against the floating support pin 6 on the clamp, then the non-working surface 4-1 of the tooth block of the second tooth, the working surface 4-2 of the tooth block of the second tooth, the non-working surface 4-3 of the tooth block of the fifth tooth, the working surface 4-4 of the tooth block of the fifth tooth of the tooth block 4 are driven by the shoulder nut 20 to press the non-working surface 605 of the part tenon tooth, the working surface 606 of the part tenon tooth, the non-working surface 607 of the part tenon tooth, the working surface 608 of the part tenon tooth; the floating support pin 6 is locked by the top pin 8 driven by the small pressing screw 7. The blade basin direction positioning push block 10 is horizontally pushed, so that the blade basin direction positioning push block saw tooth surface 10-1 at the front end of the blade basin direction positioning push block 10 abuts against the part blade crown basin direction saw tooth surface 615, and then the shoulder screw 12 is tightened; the blade back direction pressing push block 11 is horizontally pushed, so that the blade back direction pressing push block saw tooth surface 11-1 at the front end of the blade back direction pressing push block 11 abuts against the part blade crown back direction saw tooth surface 616, and then the shoulder screw 12 is tightened. The blade basin surface movable positioning block 14 naturally abuts against the part tip section blade basin surface front edge positioning section 611 and the part tip section blade basin surface rear edge positioning section 612, then the blade back surface pressing block 16 is driven by the pressing screw 17 arranged on the blade back direction pressing support 19 to press the part tip section blade back surface rear edge pressing section 613 and the part tip section blade back surface front edge pressing section 614 to press the part tip section. Specifically, the pressing screw 17 is arranged on the blade back direction pressing support plane 19-1, and the pressing screw 17 is fixed by the locking nut 18.

[0069] Specifically, the base body 101 of the adapter disc is positioned with the machine tool workbench turntable disc through the first cylindrical pin 106 and the second cylindrical pin 108, and the adapter disc is fixed with the machine tool workbench turntable disc by the third screw 107.

[0070] The lower end of the adapter disc positioning shaft 102 (first end 102-1) is matched with the φ40H7 positioning hole 101-1 in the center of the base 101, and then the positioning shaft 102 is positioned with the base 101 by using the cylindrical pin 104, and the positioning shaft 102 is fixed with the base 101 by using the second screw 105.

[0071] The φ80(+0.03,+0.01) base on the clamp base 1 is matched with the adapter disc connecting hole 1-1 on the adapter disc base 101, and then the positioning shaft 102 is positioned with the clamp and the positioning shaft 102 by using the φ8(-0.01,-0.02) positioning pin 103 at the upper end of the positioning shaft 102 and the φ8(+0.015,0) cylindrical hole on the clamp base 1, and the clamp base 1 is fixed with the positioning shaft 102 of the adapter disc by using the screw 22.

[0072] After the innovative design of the sealing tooth diamond roller 300, specifically including the vane crown sealing tooth profile surface 301, the roller left end surface 302 and the roller right end surface 303, is tightly installed with the machine tool spindle, the grinding wheel installed on the machine tool spindle is ground according to the optimized program, and the vane crown sealing tooth profile surface 301, the vane crown inlet edge end surface and the vane crown exhaust edge end surface are ground.

[0073] After the first part of the same model is processed, the part is removed, and after being measured on the special measuring tool, the second part is installed in the clamp for strong grinding processing until all the parts of the same model are processed.

[0074] When another model is processed, only the clamp needs to be replaced, and then the φ8(+0.015,0) cylindrical hole on the clamp base of the other model is positioned with the φ8(-0.01,-0.02) positioning pin 103 at the upper end of the positioning shaft 102 of the adapter disc, and then the clamp base 1 is fixed with the positioning shaft 102 of the adapter disc by using the screw 22, and then the processing can be performed. Unlike the traditional model change processing, the center of the part, the clamp and the machine tool needs to be repeatedly adjusted and processed to be re-found every time the model is changed. The method provided in the application has high processing precision, short model change time and high processing efficiency.

[0075] The embodiments provided in the application realize one-time forming and processing of the vane crown sealing tooth profile, the vane crown inlet edge end surface and the vane crown exhaust edge end surface by using the innovative design of the diamond roller, ensure the consistency of the vane crown torsion angle, and improve the processing precision and the production efficiency.

[0076] The embodiment provided by the application is a quick-change machining adapter disc for a turbine blade of an aero-engine, which mainly comprises a base body, a positioning shaft, a cylindrical pin, a screw and a clamp body used in cooperation, so that the rotation center of the machined part, the center of the clamp and the center of the machine tool turntable are consistent, the quick installation of the clamp is realized, the part machining size precision is high, the part clamping and debugging is performed once, and the intermittent machining does not need to be debugged.

[0077] The shape and size of the adapter disc base body are consistent with the size and shape of the workbench turntable of the strong grinder, so that the machining area of the machine tool is not changed, the maximum area machining part is ensured, and the machining capacity of the equipment for the part is not changed.

[0078] The quick-change machining method of the aero-engine turbine blade adopts a combination of the sawtooth surface in the direction of the shroud pot and the pot back surface in the direction of the blade tip section to improve the rigidity of the shroud tooth cantilever machining. The method ensures the machining precision of the shroud tooth profile and the two end surfaces of the inlet and outlet edges, improves the stability and rigidity of the cantilever machining, and suppresses the cantilever machining vibration and deformation. The ball head positioning structure is used for the tenon front edge positioning part, and the top cylindrical generatrix head structure is used for the blade tip section front edge floating positioning, so as to ensure the front edge positioning precision and machining stability. The leaf pot direction positioning push block and the leaf back direction pressing push block are respectively designed to be in the same sawtooth shape as the structure of the sawtooth surface in the direction of the shroud pot and the back surface in the direction of the shroud of the part, so as to ensure the accurate positioning and uniform pressing of the shroud sawtooth part. The leaf pot surface movable positioning block is designed to be in the same positioning line segment as the front and rear edge profiles of the part blade tip section leaf pot surface, so as to improve the movable positioning precision of the part blade tip section leaf pot surface. The leaf back surface pressing block is designed to be in the same positioning line segment as the front and rear edge profiles of the part blade tip section leaf back surface, so as to improve the pressing reliability of the part blade tip section leaf back surface. The clamp positioning part is made of high wear-resistant material GCr15, so as to ensure the stability of the part positioning.

[0079] The quick-change machining method of the aero-engine turbine blade improves the qualified rate of the shroud tooth profile and the two end surfaces of the inlet and outlet edges to 98%, greatly shortens the debugging and machining time (the traditional debugging and machining time is 7-8 hours, and the present debugging and machining time is less than 0.5 hours), and the machining cycle (the original machining cycle is 60 days, and the present machining cycle is 30 days), and improves the production efficiency by 50%. The method can be widely applied to the machining of various blades and is suitable for small-batch, single-batch and large-batch production.

[0080] The above merely provides a specific implementation manner of the application, but the protection scope of the application is not limited to this. Any changes or replacements within the technical range disclosed by the application can be easily thought of by those skilled in the art, and should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. An aeroengine turbine blade fast change machining adapter disk for connecting a turbine blade machining fixture, said turbine blade machining fixture comprising a base (1) and a blade clamping assembly arranged on said base (1), characterized in that, The adapter disc comprises a square base body (101), a positioning hole (101-1) is arranged in the middle of the base body (101), and a positioning shaft (102) is connected in the positioning hole (101-1), and the positioning shaft (102) is used for fixed connection with the base (1) of the turbine blade machining clamp; The positioning shaft (102) is arranged in a stepped shaft structure, the stepped shaft structure comprises a first end portion (102-1) and a second end portion connected with each other, the diameter of the second end portion is greater than that of the first end portion (102-1), the first end portion (102-1) is connected with the positioning hole (101-1), the second end portion is sunken into the base body (101) on the side connected with the first end portion (102-1), and the second end portion is exposed from the base body (101) on the side away from the first end portion (102-1); a plurality of connecting holes are arranged on the circumferential end face of the second end portion exposed from the base body (101), part of the plurality of connecting holes are used for positioning and connecting the positioning shaft (102) and the base body (101), and the other part of the plurality of connecting holes are used for positioning and connecting the positioning shaft (102) and the base (1); the plurality of connecting holes comprise first cylindrical holes and threaded holes arranged on a first circumference of the circumferential end face, the first cylindrical holes are used for cooperating with cylindrical pins (104) to position the positioning shaft (102) to coincide with the center of the base body (101), and the threaded holes are used for cooperating with first screws to fix the base (1) on the positioning shaft (102); the connecting holes further comprise second cylindrical holes and stepped holes arranged on a second circumference of the circumferential end face, the second cylindrical holes are used for cooperating with positioning pins (103) to position the positioning shaft (102) to coincide with the center of the base (1), and the stepped holes are used for cooperating with second screws (105) to fix the positioning shaft (102) on the base body (101); the diameter of the first circumference is greater than that of the second circumference. The blade clamping assembly comprises a support (2) mounted at the lower end of a base (1), a tooth seat (3) connected with the support (2), a tooth block (4), a double-end stud (23) and a shoulder nut (20). A tenon front edge positioning ball (5) placed on the clamp base (1) is designed as a ball head positioning structure at the top end. A guide support (9) is mounted at the upper end of the base (1), which comprises a guide support blade basin direction positioning surface (9-1) and a guide support blade back direction positioning surface (9-2), and is designed as a U-shaped structure. A blade tip cross section front edge floating positioning component is installed at the middle part of the U-shaped structure. The top end of a floating support pin (6) is designed as a cylindrical generatrix positioning structure. The upper end surface of the U-shaped structure of the guide support (9) is connected with a blade basin direction positioning push block (10) and a blade back direction pressing push block (11) respectively. The top end of the blade basin direction positioning push block (10) and the blade back direction pressing push block (11) is designed as a sawtooth shape consistent with the part blade crown basin back direction structure. The two sides of the U-shaped structure of the guide support (9) are respectively connected with a blade tip cross section blade basin profile movable positioning block (14) and a blade back profile pressing block (16). The blade basin profile movable positioning block (14) is connected with a blade basin profile guide strip (13), and the blade back profile pressing block (16) is connected with a blade back profile guide strip (15).

2. The aeroengine turbine blade quick change machining adapter disc of claim 1, wherein, The number of the threaded holes is greater than or equal to three, and the threaded holes are uniformly distributed on the first circumference, and / or, The number of the stepped holes is greater than or equal to three, and the stepped holes are uniformly distributed on the second circumference.

3. The aeroengine turbine blade quick change machining adapter disc of claim 1, wherein, The positioning pin (103) protrudes 5-6 mm from the circumferential end surface of the positioning shaft (102).

4. The aeroengine turbine blade quick change machining adapter disc of claim 1, wherein, The diameter of the first circumference is 64 mm, and the diameter of the second circumference is 60 mm.

5. The aeroengine turbine blade quick change machining adapter disc of claim 1, wherein, A plurality of first cylindrical pins (106) and a plurality of second cylindrical pins (108) are further arranged on the base body (101). The first cylindrical pins (106) are arranged on the left and right sides of the positioning shaft (102), and the second cylindrical pins (108) are arranged around the base body (101) and are uniformly arranged. A plurality of third screws (107) are further arranged on the base body (101), and the third screws (107) are arranged around the base body (101) and are uniformly arranged. The base body (101) is positioned with the machine tool workbench turntable through the first cylindrical pins (106) and the second cylindrical pins (108), and the base body (101) is fixedly connected with the machine tool workbench turntable through the third screws (107).

6. The turbine blade change processing adapter disk for aero-engines according to any of claims 1-5, characterized in that, The diameter of the first end portion (102-1) is 40 mm, and the diameter of the second end portion is 80 mm.

7. The turbine blade change processing adapter disk for aero-engines according to any of claims 1-5, characterized in that, The side length of the base body (101) is 530 mm, the thickness is 40 mm, and the material is aluminum alloy 7075.

8. A method for fast change machining of a turbine blade of an aeroengine, using a fast change machining adapter disc according to any one of claims 1 to 7, characterized in that, The method comprises: The turbine blade is positioned and fixed by using the blade clamping assembly, including: the part tenon tooth 2 tooth blade direction non-working surface (601), the part tenon tooth 2 tooth blade direction working surface (602), the part tenon tooth 5 tooth blade direction non-working surface (603), the part tenon tooth 5 tooth blade direction working surface (604), the horizontal push respectively with the tooth seat 2 tooth non-working surface (3-1) in the tooth seat (3) of the seal tooth clamp, the tooth seat 2 tooth working surface (3-2), the tooth seat 5 tooth non-working surface (3-3), the tooth seat 5 tooth working surface (3-4) are pasted, the part tenon front edge positioning point (609) is pasted with the positioning ball (5) on the clamp, after the part blade tip section front edge positioning point (610) is pasted with the floating support pin (6) on the clamp, the tooth block 2 tooth non-working surface (4-1) of the tooth block (4) driven by the shoulder nut (20), the tooth block 2 tooth working surface (4-2), the tooth block 5 tooth non-working surface (4-3), the tooth block 5 tooth working surface (4-4) are pressed tightly; the floating support pin (6) is locked by the top pin (8) driven by the small pressing screw (7); the blade basin direction positioning push block (10) is horizontally pushed, so that the blade basin direction positioning push block sawtooth surface (10-1) at the front end of the blade basin direction positioning push block (10) is pasted with the part blade crown basin direction sawtooth surface (615), then the shoulder screw (12) is tightened; the blade back direction pressing push block (11) is horizontally pushed, so that the blade back direction pressing push block sawtooth surface (11-1) at the front end of the blade back direction pressing push block (11) is pasted with the part blade crown back direction sawtooth surface (616), then the shoulder screw (12) is tightened; after the blade basin profile movable positioning block (14) is naturally pasted with the part blade tip section blade basin profile front edge positioning section (611) and the part blade tip section blade basin profile rear edge positioning section (612), the pressing screw (17) provided on the blade back direction pressing support (19) is twisted, the blade back profile pressing block (16) is driven, the blade tip section blade back profile rear edge pressing section (613) and the blade tip section blade back profile front edge pressing section (614) are pressed tightly; The hole on the base (1) is matched with the second end of the positioning shaft (102) on the base body (101), and the connection part is positioned and fixed; The first end (102-1) of the positioning shaft (102) is matched with the positioning hole (101-1) of the base body (101), and the connection part is positioned and fixed; The base body (101) is positioned and fixed with the machine tool workbench rotating disc; The diamond roller (300) is tightened with the machine tool spindle, and the grinding wheel mounted on the machine tool spindle is ground; The blade crown sealing tooth profile surface (301), the blade crown inlet edge end surface and the blade crown exhaust edge end surface are ground by using the ground grinding wheel.

9. The aeroengine turbine blade quick change machining method according to claim 8, wherein, The grinding processing parameters are that the rotating speed of the grinding wheel is 18-24 m / s, and the feeding speed is 80-150 mm / min.

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