A secondary positioning tool and secondary positioning method for a hollow turbine blade core

Abstract

The present invention relates to a secondary positioning tool and secondary positioning method for a hollow turbine blade core, comprising: a base, a primary positioning mechanism, a blade tip positioning mechanism, an infrared sensing device, an infrared position sensing device, a cantilever positioning mechanism and a movable auxiliary positioning mechanism, wherein the primary positioning mechanism, the blade tip positioning mechanism, the infrared sensing device, the infrared position sensing device, the cantilever positioning mechanism and the movable auxiliary positioning mechanism are all arranged on the base; the primary positioning mechanism is used to perform primary positioning on a ceramic core; the blade tip positioning mechanism, the infrared sensing device, the infrared position sensing device, the cantilever positioning mechanism and the movable auxiliary positioning mechanism cooperate with each other to achieve secondary positioning of the ceramic core. The beneficial effect of the present invention is that the use of the secondary positioning tool can ensure the precise position of the ceramic core in the mold during the molding process, thereby improving the dimensional accuracy of the hollow turbine blade.

Description

Technical Field

[0001] The invention relates to the technical field of investment casting, and in particular to a secondary positioning tool and a secondary positioning method for a hollow turbine blade core. Background Art

[0002] Hollow turbine blades are key core components of aircraft engines and gas turbines, and are generally manufactured using investment casting technology. The main processes include core making - mold making - shell making - pouring - core removal - post-process polishing, etc. Among them, mold making is to design a mold with extremely high precision according to the hollow turbine blade design drawing. After pre-embedding the ceramic core in the mold, an automatic injection molding machine is used to inject wax to obtain a hollow turbine blade wax mold with good dimensional accuracy. At present, the molding of hollow blades is manually operated, and the main operating process is to separate the upper mold from the lower mold - take the core out of the plate - put the core into the specified position of the mold - manually adjust the core position to make it fit the mold - close the upper and lower molds to start wax injection - after the wax injection is completed, take out the wax parts and put them into the plate. This process mainly has problems such as low production efficiency, unstable product quality, and high operating intensity. With the development of automation technology, robots and automation equipment have become relatively mature. The main reason why hollow turbine blade molding has not been automated is that the precision control requirements for pre-embedded core molds are high, and there is no clear solution for automatically pre-embedded cores into molds. Therefore, it is urgent to design a secondary positioning tooling and a secondary positioning method to ensure the precision of pre-embedded hollow blade cores into molds, which is conducive to the realization of fully automated production of hollow turbine blade molding, the improvement of hollow turbine blade wax mold production efficiency, and the stabilization of product quality. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a secondary positioning tool and a secondary positioning method for a hollow turbine blade core, so as to realize automatic pre-embedding of the core into the mold by a robot, thereby realizing fully automated mass production of hollow turbine blade wax molds.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a secondary positioning tool for a hollow turbine blade core, comprising: a base, a primary positioning mechanism, a blade tip positioning mechanism, an infrared sensing device, an infrared position sensing device, a cantilever positioning mechanism and a movable auxiliary positioning mechanism, wherein the primary positioning mechanism, the blade tip positioning mechanism, the infrared sensing device, the infrared position sensing device, the cantilever positioning mechanism and the movable auxiliary positioning mechanism are all arranged on the base;

[0005] The one-time positioning mechanism is used to perform one-time positioning on the ceramic core;

[0006] The blade tip positioning mechanism, the infrared sensing device, the infrared position sensing device, the cantilever positioning mechanism and the movable auxiliary positioning mechanism constitute a secondary positioning module, and the blade tip positioning mechanism, the infrared sensing device, the infrared position sensing device, the cantilever positioning mechanism and the movable auxiliary positioning mechanism cooperate with each other to realize the secondary positioning of the ceramic core;

[0007] The infrared sensing device and the infrared position sensing device are respectively arranged on both sides of the blade tip positioning mechanism, the cantilever positioning mechanism is arranged on the front side of the blade tip positioning mechanism, and the movable auxiliary positioning mechanism can be moved to cooperate with the blade tip positioning mechanism and the cantilever positioning mechanism to clamp the ceramic core;

[0008] The blade tip positioning mechanism includes: a first fixed block, a first blade tip supporting cylinder, a second blade tip supporting cylinder and a third blade tip supporting cylinder, the first fixed block is arranged on the upper end surface of the base, the first blade tip supporting cylinder, the second blade tip supporting cylinder and the third blade tip supporting cylinder are all arranged on one side of the upper end surface of the first fixed block, the third blade tip supporting cylinder, the second blade tip supporting cylinder and the first blade tip supporting cylinder are sequentially arranged in a direction away from the movable auxiliary positioning mechanism, the height of the first blade tip supporting cylinder is greater than the height of the third blade tip supporting cylinder and greater than the height of the second blade tip supporting cylinder, the second blade tip supporting cylinder and the third blade tip supporting cylinder are used to contact with the blade tip of the ceramic core, and the first blade tip supporting cylinder is used to contact with one side of the blade tip of the ceramic core.

[0009] The beneficial effects of the present invention are as follows: the use of a secondary positioning tool can ensure the accurate position of the ceramic core in the mold during the molding process, thereby improving the dimensional accuracy of the hollow turbine blade, making it meet the requirements of the engine and improving the accuracy of product manufacturing; the positioning position of the core in the mold is simulated in advance by the secondary positioning tool, and the positioned ceramic core is directly placed in the mold after the positioning is completed. The method of automatically pre-embedding the core into the mold can quickly and accurately automatically pre-embed the core into the mold, eliminating manual operation and adjustment in the molding process, improving production efficiency and consistency of the turbine hollow blade wax mold product, thereby replacing the traditional manual hollow turbine blade molding. The process reduces multiple tedious operations, making the manufacturing of hollow turbine blade wax models more concise and efficient, overcoming the problems of complex ceramic core shapes and unstable manual positioning, with high flexibility and adaptability, and can achieve rapid positioning and clamping of cores of different sizes, and quickly adapt to the positioning requirements of cores of different lengths. Through the application of various sensors, it can quickly detect situations where the manufacturing of wax models is unqualified due to irregularities and unqualified cores themselves, thereby improving the quality and performance of turbine blade wax models; at the same time, the application of core secondary positioning tooling and automatic pre-embedded mold technology after positioning is completed also helps to improve the reliability of the blades, thereby improving product quality.

[0010] Based on the above technical solution, the present invention can also be improved as follows.

[0011] Further, the primary positioning mechanism comprises: a first positioning column and a second positioning column, the first positioning column and the second positioning column are parallel to each other and are respectively vertically installed on the upper end surface of the base, and the first positioning column and the second positioning column are spaced apart;

[0012] The tops of the first positioning column and the second positioning column are both provided with grooves, and the cross-sectional dimensions of the grooves gradually decrease towards the base. The ceramic core is placed between the first positioning column and the second positioning column, and the grooves are used to support the ceramic core cantilever and position the ceramic core cantilever once.

[0013] The beneficial effect of adopting the above further scheme is: by placing the ceramic core between the first positioning column and the second positioning column, the grooves on the top of the first positioning column and the second positioning column support the lower end surface of the ceramic core cantilever and perform a primary positioning of the ceramic core cantilever; the first positioning column and the second positioning column provide a stable support frame for the ceramic core, ensuring that the ceramic core can be accurately aligned and placed in a predetermined position when placed in the first positioning column and the second positioning column, so as to facilitate accurate grasping of the ceramic core after primary positioning and placing the ceramic core on the secondary positioning module; the groove is set to a shape of larger top and smaller bottom, which makes it more convenient for the robot to clamp the ceramic core cantilever from the core disk and accurately place it in the primary positioning mechanism, so that the ceramic core cantilever can automatically slide to the bottom of the groove by gravity after being placed in the primary positioning mechanism, thereby achieving fast and stable primary positioning.

[0014] Furthermore, the blade tip positioning mechanism further comprises: a T-shaped connection structure, a clamping block, a movable block and a cylindrical table, wherein the T-shaped connection structure, the clamping block, the movable block and the cylindrical table are all arranged on the upper end surface of the first fixed block;

[0015] The upper end surface of the first fixed block is provided with a slide groove, the movable block is arranged in the slide groove and slides along the slide groove, and the two sides of the movable block are respectively fixed to the upper end surface of the first fixed block by one of the clamping blocks;

[0016] One side of the movable movable block in the sliding direction is connected to the T-shaped connection structure, the movable movable block is arranged between the second blade tip support cylinder and the T-shaped connection structure, and the adjustable screw is arranged at one end of the T-shaped connection structure away from the movable movable block;

[0017] The cylindrical platform is arranged on one side of the first fixed block close to the movable auxiliary positioning mechanism, and is used to support the movable auxiliary positioning mechanism.

[0018] The beneficial effects of adopting the above-mentioned further scheme are: by assembling the clamping block and the movable movable block, the movable movable block can be accurately positioned and is not prone to deviation; the first blade tip support cylinder, the second blade tip support cylinder and the third blade tip support cylinder are directly in contact with the ceramic core, and are mainly used to support the blade tip of the ceramic core, to assist in achieving accurate positioning of the blade tip of the ceramic core, and the cylindrical table is used for contact and support with the L-shaped support plate to avoid deformation of the L-shaped support plate.

[0019] Further, it also includes: a position sensor matched with the blade tip positioning mechanism, the position sensor is provided with a measuring head, and the measuring head is arranged on a side of the movable block away from the T-shaped connection structure;

[0020] The adjustable screw drives the movable block to move to adjust the position of the measuring head, and the measuring head is used to sense the position of the ceramic core blade tip and output an alarm.

[0021] The beneficial effect of adopting the above further solution is that the arrangement can realize the position sensing of the blade tip of the ceramic core and measure whether the tolerance of the blade tip position meets the requirements.

[0022] Furthermore, the infrared sensing device includes: a sensing column and a sensor, wherein the sensing column is arranged on one side of the first fixing block, and the sensor is arranged on the sensing column, and the sensor is used to sense whether the ceramic core is placed.

[0023] The beneficial effect of adopting the above further solution is that the sensor can sense whether a ceramic core is placed on the secondary positioning module.

[0024] Furthermore, there are two infrared position sensing devices in total, and both of them are arranged on the same side of the blade tip positioning mechanism; the infrared position sensing device includes: a position sensing column and a position sensor, and the position sensing column is arranged on the other side of the first fixed block, one of the position sensors is arranged on the position sensing column corresponding to the upper edge of the exhaust edge of the ceramic core blade body, and the other position sensor is higher than the upper edge of the exhaust edge of the ceramic core blade body and is arranged on the position sensing column, and the position sensor is used to check whether the ceramic core blade body is warped.

[0025] The beneficial effect of adopting the above further scheme is that the infrared position sensing device can detect whether the blade of the ceramic core is warped upward or downward. If the detection is unqualified, the signal is fed back to the control system to output an alarm, and the ceramic core is manually processed.

[0026] Further, the cantilever positioning mechanism comprises: a second fixed block, a first cantilever support column, a second cantilever support column and a cantilever side column positioning column, the second fixed block is arranged on the base at the front side of the blade tip positioning mechanism, the upper end surface of the second fixed block is sequentially provided with the first cantilever support column, the second cantilever support column and the cantilever side column positioning column in the direction away from the movable auxiliary positioning mechanism, the first cantilever support column, the second cantilever support column and the cantilever side column positioning column are arranged in a colinear manner, and the upper end surface of the second fixed block which is not provided with the first cantilever support column, the second cantilever support column and the cantilever side column positioning column is used to support the movable auxiliary positioning mechanism;

[0027] The first cantilever support column, the second cantilever support column and the cantilever side column positioning column are spaced apart and arranged in parallel with each other. The first cantilever support column and the second cantilever support column have the same height, and the cantilever side column positioning column has a height higher than that of the first cantilever support column and the second cantilever support column. The first cantilever support column and the second cantilever support column are used to support the bottom of the ceramic core cantilever, and the cantilever side column positioning column is used to contact the side of the ceramic core cantilever.

[0028] The beneficial effect of adopting the above further scheme is: when the ceramic core is placed on the secondary positioning module, the ceramic core cantilever is supported by the first cantilever support column and the second cantilever support column, and the cantilever side column positioning column is arranged to contact the side of the ceramic core cantilever from one side of the ceramic core to achieve the positioning of the ceramic core; at the same time, part of the upper end surface of the second fixed block contacts the L-shaped support plate on the movable auxiliary positioning mechanism for supporting the L-shaped support plate.

[0029] Further, the movable auxiliary positioning mechanism includes: a cylinder slider, an L-shaped support plate, a cantilever side column, a symmetrical positioning column, a positioning small cylinder and a blade tip auxiliary positioning column, the cylinder slider is arranged on the upper end surface of the base, and the movable end of the cylinder slider is connected to the L-shaped support plate to drive the L-shaped support plate to move;

[0030] The cantilever side column, the pair of symmetrical positioning columns and the blade tip auxiliary positioning column are all arranged on the upper end surface of the L-shaped support plate;

[0031] A pair of the symmetrical positioning columns are pushed by the L-shaped support plate to be respectively arranged in one-to-one correspondence with the first cantilever support column and the second cantilever support column, and the front side of the symmetrical positioning column close to the first cantilever support column or the second cantilever support column is also provided with the positioning small cylinder, and the positioning small cylinder is used to be arranged in contact with one side of the length direction of the ceramic core;

[0032] The cantilever side column is pushed by the L-shaped support plate to be arranged corresponding to the cantilever side column positioning column, and the cantilever side column is used to be arranged in contact with the side surface of the ceramic core cantilever.

[0033] The blade tip auxiliary positioning column is pushed by the L-shaped support plate to be arranged corresponding to the first blade tip supporting cylinder, and is used for being arranged in contact with the back side of the ceramic core blade tip.

[0034] The beneficial effects of adopting the above further scheme are: the sliding of the cylinder slider drives the sliding of the L-shaped support plate, and the automatic clamping and positioning of the ceramic core is realized by the cantilever side column, the symmetrical positioning column, the small positioning cylinder and the blade tip auxiliary positioning column; the positioning of one side of the length direction of the ceramic core is realized by the symmetrical positioning column and the small positioning cylinder; the positioning of both sides of the cantilever width direction of the ceramic core on the ceramic core is realized by the cantilever side column and the cantilever side column positioning column; the blade tip auxiliary positioning column contacts the back side of the ceramic core tip from one side of the ceramic core, and cooperates with the first blade tip support cylinder, the second blade tip support cylinder, and the third blade tip support cylinder to realize the positioning of the blade tip of the ceramic core.

[0035] A method for secondary positioning of a hollow turbine blade core is also disclosed, using any of the above-mentioned secondary positioning tooling for the hollow turbine blade core, and the steps are as follows:

[0036] S1: Clamp the cantilever part of the ceramic core and put the ceramic core into the primary positioning mechanism for primary positioning;

[0037] S2: After the primary positioning is completed, the ceramic core is placed on the secondary positioning module, the ceramic core is clamped by the movable auxiliary positioning mechanism in the secondary positioning module, an infrared sensing device is used to sense whether the ceramic core is placed, an infrared position sensing device is used to sense whether the ceramic core is warped, a position sensor is used to measure the length of the ceramic core, and it is confirmed whether the measurement result is within a set error range;

[0038] S3: If any measurement result of the infrared sensing device, the infrared position sensing device and the position sensor does not meet the requirements, an alarm prompt is output;

[0039] S4: If the measurement results of the infrared sensing device, the infrared position sensing device and the position sensor all meet the requirements, it means that the ceramic core positioning test is qualified, and the movable auxiliary positioning mechanism releases the clamping of the ceramic core and puts the ceramic core into the mold in this positioning posture.

[0040] The beneficial effects of adopting the above further scheme are: the problem of low storage accuracy in batch core plates can be solved by the one-time positioning mechanism, and the ceramic core is convenient for the manipulator to accurately grasp the core position after being positioned by the one-time positioning mechanism; the ceramic core is automatically clamped and positioned by the movable auxiliary positioning mechanism in the secondary positioning, the infrared sensing device detects whether the core is accurately placed, and the infrared position sensing device senses whether the ceramic core is warped. The position sensor measures and senses the length of the core, and the infrared sensing device, infrared position sensing device and position sensor ensure quality control during the production process. Through the combination of one-time positioning and two-time positioning, the placement accuracy of the ceramic core in the core embedded mold is greatly improved, and the error in subsequent processing is reduced. The entire positioning process, including the clamping of the ceramic core, primary positioning, secondary positioning detection and final placement into the mold, is completed by a robot and an automated control system. The positioning position of the core in the mold is simulated in advance. After the positioning is completed, the robot clamps the positioned core and accurately places it into the mold to start molding. The entire process completely avoids human involvement and can replace manual work. It also reduces the risk of errors caused by human operation, which is conducive to the realization of fully automated production of hollow turbine blade molding, improving the production efficiency of hollow turbine blade wax molds, and stabilizing product quality.

[0041] Furthermore, before placing the ceramic core on the secondary positioning module for secondary positioning, it is necessary to adjust the position of the measuring head provided on the blade tip positioning mechanism so that the measuring head contacts the end of the blade tip of the ceramic core.

[0042] The beneficial effects of adopting the above further scheme are: by accurately adjusting the position of the measuring head, ensuring that it is in close contact with the end of the ceramic core blade tip, thereby realizing the measurement induction of the core length with high measurement accuracy; through the design of the adjustable screw, the measuring head can be flexibly adjusted according to ceramic cores of different sizes, and can be suitable for ceramic cores of various specifications, thereby improving the versatility and flexibility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0044] Figure 2 It is a structural schematic diagram of a ceramic core;

[0045] Figure 3 It is a structural schematic diagram of a primary positioning mechanism in an embodiment of the present invention;

[0046] Figure 4 It is a schematic diagram of the assembly of the blade tip positioning mechanism and the position sensor in one embodiment of the present invention;

[0047] Figure 5 It is a schematic diagram of the partial structural assembly of an embodiment of the present invention;

[0048] Figure 6 A schematic diagram of the structure of a movable auxiliary positioning mechanism in an embodiment of the present invention;

[0049] Figure 7 It is a one-time positioning position diagram of the present invention;

[0050] Figure 8 It is the secondary positioning position diagram of the present invention;

[0051] Fig. 9 The location map is completed for positioning the present invention.

[0052] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0053] 1. Base; 2. One-time positioning mechanism; 3. Blade tip positioning mechanism; 4. Position sensor; 5. Infrared sensing device; 6. Infrared position sensing device; 7. Cantilever positioning mechanism; 8. Movable auxiliary positioning mechanism; 9. Ceramic core; 21. First positioning column; 22. Second positioning column; 23. Groove; 31. First fixing block; 32. Adjustable screw; 33. T-type connection structure; 34. Clamping block; 35. Movable movable block; 36. First blade tip supporting cylinder; 37. Second blade tip supporting cylinder; 38. Third blade tip supporting cylinder; 39. Cylindrical table; 41. Measuring head; 51. Sensing column; 52. Sensor; 61. Position sensing column; 62. Position sensor; 71. Second fixed block; 72. First cantilever support column; 73. Second cantilever support column; 74. Cantilever side column positioning column; 81. Cylinder slider; 82. L-shaped support plate; 83. Cantilever side column; 84. Symmetrical positioning column; 85. Small positioning cylinder; 86. Blade tip auxiliary positioning column; 91. Ceramic core blade tip; 92. Ceramic core blade body; 93. Ceramic core tenon; 94. Ceramic core cantilever. DETAILED DESCRIPTION

[0054] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0055] First, as Figure 1As shown, the present invention provides a secondary positioning tool for a hollow turbine blade core, comprising: a base 1, a primary positioning mechanism 2, a blade tip positioning mechanism 3, an infrared sensing device 5, an infrared position sensing device 6, a cantilever positioning mechanism 7 and a movable auxiliary positioning mechanism 8, wherein the blade tip positioning mechanism 3, the infrared sensing device 5, the infrared position sensing device 6, the cantilever positioning mechanism 7 and the movable auxiliary positioning mechanism 8 constitute a secondary positioning module, the primary positioning mechanism 2, the blade tip positioning mechanism 3, the infrared sensing device 5, the infrared position sensing device 6, the cantilever positioning mechanism 7 and the movable auxiliary positioning mechanism 8 are all arranged on the upper end surface of the base 1, the primary positioning of the ceramic core 9 is achieved by the primary positioning mechanism 2, and the secondary positioning of the ceramic core 9 is achieved by the secondary positioning module.

[0056] The connection relationship between the structures in the secondary positioning module is as follows: the infrared sensing device 5 and the infrared position sensing device 6 are respectively arranged on both sides of the blade tip positioning mechanism 3, and the cantilever positioning mechanism 7 is arranged on the front side of the blade tip positioning mechanism 3. When the ceramic core 9 is placed on the secondary positioning module, the movable auxiliary positioning mechanism 8 can be moved to one side of the ceramic core 9, and cooperate with the blade tip positioning mechanism 3 and the cantilever positioning mechanism 7 to realize automatic clamping of the ceramic core 9.

[0057] In this embodiment, the secondary positioning of the turbine blade ceramic core 9 is achieved by a secondary positioning tool, wherein a typical turbine blade ceramic core 9 includes: a ceramic core blade tip 91, a ceramic core blade body 92, a ceramic core tenon 93 and a ceramic core cantilever 94, and the positions of the ceramic core blade tip 91, the ceramic core blade body 92, the ceramic core tenon 93 and the ceramic core cantilever 94 in the entire ceramic core 9 are as follows: Figure 2 shown.

[0058] In the above scheme, the use of secondary positioning tooling can ensure the precise position of the ceramic core 9 in the mold during the molding process, thereby improving the dimensional accuracy of the hollow turbine blade, making it meet the requirements of the engine and improving the accuracy of product manufacturing; the positioning position of the core in the mold is simulated in advance by the secondary positioning tooling, and the positioned ceramic core 9 is directly placed in the mold after the positioning is completed. The method of automatically pre-embedding the core into the mold can quickly and accurately embed the core into the mold automatically, eliminating manual operation and adjustment in the molding process, improving production efficiency and consistency of turbine hollow blade wax mold products, thereby replacing the traditional manual hollow turbine blade molding process. The process reduces multiple tedious operations, making the manufacturing of hollow turbine blade wax molds more concise and efficient, overcoming the problems of complex shape of ceramic core 9 and unstable manual positioning, and having high flexibility and adaptability, and can realize fast positioning and clamping of cores of different sizes, and quickly adapt to the positioning requirements of cores of different lengths. Through the application of various sensors, it can quickly detect situations in which the manufacturing of wax molds is unqualified due to irregular and unqualified cores, thereby improving the quality and performance of turbine blade wax molds. At the same time, the application of core secondary positioning tooling and automatic pre-embedded mold technology after positioning is completed also helps to improve the reliability of the blades, thereby improving product quality.

[0059] like Figure 3 As shown, in the preferred scheme, the one-time positioning mechanism 2 includes: a first positioning column 21 and a second positioning column 22, the first positioning column 21 and the second positioning column 22 are parallel to each other, both are vertically installed on the upper end surface of the base 1, and the first positioning column 21 and the second positioning column 22 are spaced apart, so that the ceramic core 9 can be placed between the first positioning column 21 and the second positioning column 22 to achieve one-time positioning of the ceramic core 9.

[0060] A groove 23 is provided at the top of the first positioning column 21 and the second positioning column 22. The groove 23 is only provided at a section of the top of the first positioning column 21 and the second positioning column 22, and is not provided through the first positioning column 21 or the second positioning column 22, so that when the ceramic core 9 is placed in the first positioning column 21 and the second positioning column 22, the ceramic core cantilever 94 of the ceramic core 9 can be placed in the groove 23 to support the ceramic core cantilever 94. At the same time, in order to make it more convenient for the manipulator to clamp the ceramic core cantilever 94 from the core plate and accurately place it in the primary positioning mechanism 2, and automatically rely on gravity to position the ceramic core cantilever 94, the groove 23 at the top of the first positioning column 21 and the second positioning column 22 is designed to be large at the top and small at the bottom, that is, the cross-sectional size of the groove 23 gradually decreases toward the base 1.

[0061] In the above scheme, by placing the ceramic core 9 between the first positioning column 21 and the second positioning column 22, the grooves 23 on the top of the first positioning column 21 and the second positioning column 22 support the lower end surface of the ceramic core cantilever 94 and position the ceramic core cantilever 94 once; the first positioning column 21 and the second positioning column 22 provide a stable support frame for the ceramic core 9, ensuring that the ceramic core 9 can be accurately aligned and placed in the predetermined position when placed in the first positioning column 21 and the second positioning column 22, so as to facilitate the accurate grasping of the ceramic core 9 after the primary positioning and place the ceramic core 9 on the secondary positioning module; the groove 23 is set to a shape of larger top and smaller bottom, which makes it more convenient for the robot to clamp the ceramic core cantilever 94 from the core disk and accurately place it in the primary positioning mechanism 2, so that the ceramic core cantilever 94 can automatically slide to the bottom of the groove 23 by gravity after being placed in the primary positioning mechanism 2, thereby achieving fast and stable primary positioning.

[0062] like Figure 4 As shown, in the preferred scheme, the blade tip positioning mechanism 3 includes: a first fixed block 31, a T-shaped connecting structure 33, a clamping block 34, a movable block 35, a first blade tip supporting cylinder 36, a second blade tip supporting cylinder 37, a third blade tip supporting cylinder 38 and a cylindrical platform 39, wherein the first fixed block 31 is fixed to the upper end surface of the base 1 by fasteners, and the T-shaped connecting structure 33, the clamping block 34, the movable block 35, the first blade tip supporting cylinder 36, the second blade tip supporting cylinder 37, the third blade tip supporting cylinder 38 and the cylindrical platform 39 are all arranged on the upper end surface of the first fixed block 31.

[0063] Specifically, a slide groove is opened on the upper end surface of the first fixed block 31, and the movable movable block 35 is arranged in the slide groove and slides along the slide groove. A clamping block 34 is also arranged on both sides of the slide groove in the width direction. The clamping block 34 and the lower part of the movable movable block 35 are overlapped, so that the two sides of the movable movable block 35 can be pressed and fixed on the upper end surface of the first fixed block 31 by the clamping blocks 34 respectively, and the clamping block 34 is fixedly connected to the first fixed block 31 by fasteners. At the same time, a connecting groove is also provided on one side of the movable movable block 35, and the connecting groove is opened on one side of the sliding direction of the movable movable block 35. A T-shaped connecting structure 33 is provided at the end of the adjustable screw 32, and the T-shaped connecting structure 33 is embedded in the connecting groove to realize the connection between the adjustable screw 32 and the movable movable block 35. By screwing the adjustable screw 32 relative to the position of the connecting block assembled with it, the movable movable block 35 is driven to slide along the sliding groove through the T-shaped connecting structure 33, so as to realize the adjustment of the position of the movable movable block 35, thereby realizing the adjustment of the structural position set on the movable movable block 35.

[0064] In this embodiment, the first blade tip support cylinder 36, the second blade tip support cylinder 37 and the third blade tip support cylinder 38 are all arranged on the side of the first fixed block 31 away from the T-shaped connecting structure 33, and the third blade tip support cylinder 38, the second blade tip support cylinder 37 and the first blade tip support cylinder 36 are sequentially arranged in the direction away from the movable auxiliary positioning mechanism 8, the height of the first blade tip support cylinder 36 is greater than the height of the third blade tip support cylinder 38 and the height of the second blade tip support cylinder 37, and the setting positions of the first blade tip support cylinder 36, the second blade tip support cylinder 37 and the third blade tip support cylinder 38 should be such that when the ceramic core 9 is placed on the secondary positioning module, the second blade tip support cylinder 37 and the third blade tip support cylinder 38 are respectively in contact with the ceramic core blade tip 91, and the first blade tip support cylinder 36 is in contact with one side of the ceramic core blade tip 91 in the width direction.

[0065] At the same time, a cylindrical platform 39 is also provided on the upper end surface of the first fixed block 31 on the side close to the movable auxiliary positioning mechanism 8. The cylindrical platform 39 is mainly used to support the L-shaped support plate 82 in the movable auxiliary positioning mechanism 8 to prevent the L-shaped support plate 82 from deforming.

[0066] In the above scheme, the movable movable block 35 is assembled by the clamping block 34 to achieve precise positioning of the movable movable block 35, and it is not easy to cause deviation; the first blade tip support cylinder 36, the second blade tip support cylinder 37 and the third blade tip support cylinder 38 are directly in contact with the ceramic core 9, and are mainly used to support the ceramic core blade tip 91, and assist in achieving precise positioning of the ceramic core blade tip 91. The cylindrical platform 39 is used for contacting and supporting the L-shaped support plate 82 to avoid deformation of the L-shaped support plate 82.

[0067] like Figure 4 As shown, in the preferred scheme, the secondary positioning tooling also includes: a position sensor 4 that cooperates with the blade tip positioning mechanism 3, the position sensor 4 has a measuring head 41, the measuring head 41 is arranged at the end of the position sensor 4, the position sensor 4 is installed on the movable movable block 35, and the end where the measuring head 41 is arranged extends to the side of the movable movable block 35 away from the T-shaped connection structure 33.

[0068] Through the cooperation between the blade tip positioning mechanism 3 and the position sensor 4, the rotating adjustable screw 32 can drive the movable movable block 35 to move to adjust the position of the measuring head 41 on the position sensor 4. When the ceramic core 9 is placed on the secondary positioning module, the end of the ceramic core blade tip 91 should contact the measuring head 41, that is, one side of the ceramic core 9 in the length direction contacts the measuring head 41, and then the measuring head 41 retreats to the set position, thereby realizing the measurement of the position tolerance of the ceramic core blade tip 91. This design can realize the position sensing of the ceramic core blade tip 91, and measure whether the tolerance of the blade tip position meets the requirements. If it does not meet the tolerance, manual processing is performed through the system alarm, thereby realizing the position alarm of the ceramic core blade tip 91, and at the same time, the position of the movable movable block 35 can be adjusted to be compatible with ceramic cores 9 of different lengths. In this embodiment, the position sensor 4 can be of model: GTH10, and the position sensor 4 can be externally connected to a control system, and the control system uses a circuit board, etc.

[0069] like Figure 5 As shown, in the preferred solution, the infrared sensing device 5 includes: a sensing column 51 and a sensor 52, the sensing column 51 is installed on one side of the first fixed block 31, and the sensor 52 is arranged on the sensing column 51, wherein the sensor 52 and the sensing column 51 are arranged in such a way that when the ceramic core 9 is placed on the secondary positioning module, the exhaust edge at the blade body 92 of the ceramic core is opposite to the infrared sensing device 5, so that the exhaust edge can be captured by the sensor 52, and whether the ceramic core 9 is placed on the secondary positioning module can be sensed by the sensor 52.

[0070] Similarly, the infrared sensing device 5 can also be externally connected to the control system and output the measurement result to the control system. When the infrared sensing device 5 fails to detect the ceramic core 9, an alarm is outputted through the control system.

[0071] like Figure 5As shown, in the preferred solution, there are two infrared position sensing devices 6, which are arranged on the same side of the blade tip positioning mechanism 3. One of the infrared position sensing devices 6 is not shown in the figure. It can be imagined that the two infrared position sensing devices 6 do not affect each other after installation. The infrared position sensing device 6 includes: a position sensing column 61 and a position sensor 62. The position sensing column 61 is arranged on the other side of the first fixed block 31 and is arranged opposite to the infrared sensing device 5. The position sensor 62 is fixedly mounted on the position sensing column 61. In this embodiment, the infrared position sensing device 6 is a point-type sensor. The position of the position sensing column 61 and the position sensor 62 should be arranged so that when the ceramic core 9 is placed on the secondary positioning module, the upper edge of the exhaust edge and the position sensor 62 on one of the infrared position sensing devices 6 are located on the same horizontal plane. The position sensor 62 can just capture the upper edge of the exhaust edge, and the position sensor 62 at this position is defined as the first position sensor; the position sensor 62 on the other infrared position sensing device 6 is slightly higher than the upper edge of the exhaust edge, and the position sensor 62 at this position is defined as the second position sensor. If the first position sensor does not sense the upper edge of the exhaust side, an alarm is output, indicating that the ceramic core 9 is warped downward; if the second position sensor detects the upper edge of the ceramic core, an alarm is output, indicating that the ceramic core 9 is warped upward.

[0072] Similarly, the infrared position sensing device 6 can also be connected to an external control system and output the measurement results to the control system. When the first position sensor in the infrared position sensing device 6 fails to detect the upper edge of the exhaust side of the ceramic core 9, the control system outputs an alarm; or when the second position sensor detects the upper edge of the ceramic core, the control system outputs an alarm. The infrared position sensing device 6 can detect whether the ceramic core blade 92 is warped upward or downward. If the detection is unqualified, the control system outputs an alarm through signal feedback, and then the ceramic core 9 is manually processed.

[0073] like Figure 5As shown, in the preferred scheme, the cantilever positioning mechanism 7 includes: a second fixed block 71, a first cantilever support column 72, a second cantilever support column 73 and a cantilever side column positioning column 74. The second fixed block 71 is fixed to the base 1 on the front side of the blade tip positioning mechanism 3 by fasteners. In this embodiment, the side of the movable block 35 on the blade tip positioning mechanism 3 away from the adjustable screw 32 is defined as the front side of the blade tip positioning mechanism 3. The first cantilever support column 72, the second cantilever support column 73 and the cantilever side column positioning column 74 are sequentially arranged on the upper end surface of the second fixed block 71 facing away from the movable auxiliary positioning mechanism 8, wherein the first cantilever support column 72, the second cantilever support column 73 and the cantilever side column positioning column 74 are arranged in a colinear manner, and the first cantilever support column 72, the second cantilever support column 73 and the cantilever side column positioning column 74 are spaced apart from each other and arranged in parallel, the first cantilever support column 72 and the second cantilever support column 73 have the same height, and the cantilever side column positioning column 74 has a height higher than that of the first cantilever support column 72 and the second cantilever support column 73.

[0074] The upper end surface of the second fixed block 71 , on which the first cantilever support column 72 , the second cantilever support column 73 and the cantilever side column positioning column 74 are not provided, is used to support the movable auxiliary positioning mechanism 8 .

[0075] In the above scheme, when the ceramic core 9 is placed on the secondary positioning module, the ceramic core cantilever 94 is supported by the first cantilever support column 72 and the second cantilever support column 73, and the cantilever side column positioning column 74 is arranged to contact the side of the ceramic core cantilever 94 from one side of the ceramic core 9 to realize the positioning of the ceramic core 9; at the same time, part of the upper end surface of the second fixed block 71 contacts the L-shaped support plate 82 on the movable auxiliary positioning mechanism 8, which is used to support the L-shaped support plate 82.

[0076] like Figure 6 As shown, in the preferred solution, the movable auxiliary positioning mechanism 8 includes: a cylinder slider 81, an L-shaped support plate 82, a cantilever side column 83, a symmetrical positioning column 84, a small positioning cylinder 85 and a blade tip auxiliary positioning column 86. The cylinder slider 81 is fixedly mounted on the upper end surface of the base 1, and the movable end of the cylinder slider 81 is connected to the L-shaped support plate 82, and the L-shaped support plate 82 is installed above the cylinder slider 81, and the L-shaped support plate 82 is driven to move by the cylinder slider 81. The cantilever side column 83, a pair of symmetrical positioning columns 84 and the blade tip auxiliary positioning column 86 are all fixedly mounted on the upper end surface of the L-shaped support plate 82, and the cylinder slider 81 slides to drive the L-shaped support plate 82 to slide, and the automatic clamping and positioning of the ceramic core 9 is realized by the cantilever side column 83, the symmetrical positioning column 84, the small positioning cylinder 85 and the blade tip auxiliary positioning column 86.

[0077] In this embodiment, the L-shaped support plate 82 is a special-shaped plate. When the ceramic core 9 is placed on the secondary positioning module, the installation position of a pair of symmetrical positioning columns 84 on the L-shaped support plate 82 should be such that: a pair of symmetrical positioning columns 84 are pushed by the L-shaped support plate 82 to correspond to the first cantilever support column 72 and the second cantilever support column 73 respectively, and a small positioning cylinder 85 is provided on the side of each symmetrical positioning column 84 close to the first cantilever support column 72, so that the small positioning cylinder 85 is just in contact with the side of the ceramic core 9 where the ceramic core cantilever 94 is provided in the length direction, thereby realizing the positioning of one side of the ceramic core 9 in the length direction.

[0078] The installation position of the cantilever side column 83 on the L-shaped support plate 82 should be such that: the cantilever side column 83 is pushed by the L-shaped support plate 82 to correspond to the cantilever side column positioning column 74, so that the cantilever side column 83 is in contact with the side of the ceramic core cantilever 94 from the other side of the ceramic core 9, and the positioning of the ceramic core cantilever 94 on both sides of the width direction on the ceramic core 9 is achieved by the cantilever side column 83 cooperating with the cantilever side column positioning column 74.

[0079] The installation position of the blade tip auxiliary positioning column 86 on the L-shaped support plate 82 should be such that: the blade tip auxiliary positioning column 86 is pushed by the L-shaped support plate 82 to a corresponding setting with the first blade tip support cylinder 36, so that the blade tip auxiliary positioning column 86 contacts the back side of the ceramic core blade tip 91 from one side of the ceramic core 9, and cooperates with the first blade tip support cylinder 36, the second blade tip support cylinder 37, and the third blade tip support cylinder 38 to realize the positioning of the ceramic core blade tip 91.

[0080] In a second aspect, a method for secondary positioning of a hollow turbine blade core is also disclosed, using the above-mentioned secondary positioning tool for the hollow turbine blade core, the steps are:

[0081] S1: Clamp the cantilever part of the ceramic core and place the ceramic core 9 into the primary positioning mechanism 2 for primary positioning. Figure 7 As shown, in step S1, a part of the ceramic core cantilever 94 is clamped from the core disk by a robot and placed on the primary positioning mechanism 2. The tip of the ceramic core 9 is located at the bottom. After being placed in the primary positioning mechanism 2, the ceramic core cantilever 94 can automatically slide to the bottom of the groove 23 by gravity. The lower end surface of the ceramic core cantilever 94 is supported by the first positioning column 21 and the groove 23 opened on the top of the second positioning column 22, and the ceramic core cantilever 94 is positioned once.

[0082] S2: After the primary positioning is completed, the ceramic core 9 is placed on the secondary positioning module, and the ceramic core 9 is clamped and positioned by the movable auxiliary positioning mechanism 8 in the secondary positioning module. The infrared sensing device 5 senses whether the ceramic core 9 is placed in, and the infrared position sensing device 6 senses whether the ceramic core 9 is warped. The position sensor 4 measures the length of the ceramic core 9, and confirms whether the measurement result is within the set error range.

[0083] like Figure 8 As shown, in step S2, after the ceramic core 9 is positioned in the primary positioning mechanism 2, the manipulator also grabs the position of the ceramic core cantilever 94 and puts it into the secondary positioning module, and the cylinder slider 81 in the movable auxiliary positioning mechanism 8 drives the L-shaped support plate 82 and the cantilever side column 83, a pair of symmetrical positioning columns 84 and the blade tip auxiliary positioning column 86 to move together, and the pair of symmetrical positioning columns 84 are pushed to the positioning small cylinder 85 on the pair of symmetrical positioning columns 84 to contact with one side of the length direction of the ceramic core cantilever 94, so as to position one side of the length direction of the ceramic core 9; the cantilever side column 83 is pushed to the ceramic The core cantilever 94 is arranged in contact with one side in the width direction, the cantilever side column positioning column 74 is arranged in contact with the other side in the width direction of the ceramic core cantilever 94, and the cantilever side column 83 cooperates with the cantilever side column positioning column 74 to realize the clamping positioning of both sides of the width direction of the ceramic core cantilever 94; the blade tip auxiliary positioning column 86 is pushed by the L-shaped support plate 82 to contact the back side of the ceramic core blade tip 91, and the first blade tip support cylinder 36 corresponds to the blade tip auxiliary positioning column 86 and is arranged in contact with the other side in the width direction of the ceramic core blade tip 91, and the blade tip auxiliary positioning column 86 cooperates with the first blade tip support cylinder 36 to realize the clamping positioning of the ceramic core blade tip 91 in the width direction.

[0084] S3: If any measurement result of the infrared sensing device 5, the infrared position sensing device 6 and the position sensor 4 does not meet the requirements, an alarm prompt is output. That is, if the measurement result is: the infrared sensing device 5 does not sense the ceramic core 9, the infrared position sensing device 6 senses that the ceramic core 9 is warped, or the measurement result of the length of the ceramic core 9 by the measuring head 41 of the position sensor 4 is not within the error range, it means that the positioning detection of the ceramic core 9 is unqualified, and an alarm prompt is output through the control system. The warping of the ceramic core 9 is divided into upward warping or downward warping. When any of the situations is detected, an alarm prompt is output through the control system.

[0085] S4: If the measurement results of the infrared sensing device 5, the infrared position sensing device 6 and the position sensor 4 all meet the requirements, it means that the positioning detection of the ceramic core 9 is qualified, and the movable auxiliary positioning mechanism 8 releases the clamping of the ceramic core 9 and puts the ceramic core 9 into the mold in this positioning posture.

[0086] like Fig. 9 As shown, in step S4, after the movable auxiliary positioning mechanism 8 releases the ceramic core 9, the tenon part is also clamped by the manipulator and smoothly placed into the mold. The manipulator can be purchased as needed to achieve the above-mentioned clamping action, which is not the focus of protection of this embodiment and is not limited here.

[0087] In the above scheme, the problem of low storage accuracy in batch core plates can be solved by the primary positioning mechanism 2. After the ceramic core 9 is positioned by the primary positioning mechanism 2, it is convenient for the manipulator to accurately grasp the core position; the ceramic core 9 is automatically clamped and positioned by the movable auxiliary positioning mechanism 8 in the secondary positioning, the infrared sensing device 5 detects whether the core is accurately placed, and the infrared position sensing device 6 senses whether the ceramic core 9 is warped. The position sensor 4 measures and senses the length of the core. The infrared sensing device 5, the infrared position sensing device 6 and the position sensor 4 ensure quality control during the production process. Through the combination of primary positioning and secondary positioning, the placement accuracy of the ceramic core 9 in the core embedded mold is greatly improved, and the error in subsequent processing is reduced. The entire positioning process, including the clamping of the ceramic core 9, primary positioning, secondary positioning detection and final placement into the mold, is completed by a manipulator and an automated control system. The positioning position of the core in the mold is simulated in advance. After the positioning is completed, the manipulator clamps the positioned core and accurately places it into the mold to start molding. The entire process completely avoids human involvement and can replace manual work. It also reduces the risk of errors caused by human operation, which is conducive to the realization of fully automated production of hollow turbine blade molding, improving the production efficiency of hollow turbine blade wax molds, and stabilizing product quality.

[0088] Furthermore, before performing the secondary positioning, it is necessary to adjust the position of the measuring head 41 set on the blade tip positioning mechanism 3. Specifically, the movable block 35 and the measuring head 41 set on the movable block 35 are driven by rotating the adjustable screw 32, so that the measuring head 41 contacts the end of the ceramic core blade tip 91. After that, the measuring head 41 retreats to the set position, thereby realizing the measurement of the position tolerance of the ceramic core blade tip 91. This design can realize the position sensing of the ceramic core blade tip 91 and measure whether the tolerance of the blade tip position meets the requirements.

[0089] In the above scheme, by accurately adjusting the position of the measuring head 41, it is ensured that it is in close contact with the end of the ceramic core blade tip 91, thereby realizing the measurement induction of the core length with high measurement accuracy; through the design of the adjustable screw 32, the measuring head 41 can be flexibly adjusted according to ceramic cores 9 of different sizes, and can be suitable for ceramic cores 9 of various specifications, thereby improving the versatility and flexibility of the equipment.

[0090] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0091] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0092] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0093] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0094] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0095] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A secondary positioning tool for a hollow turbine blade core, characterized in that: include: A base (1), a primary positioning mechanism (2), a blade tip positioning mechanism (3), an infrared sensing device (5), an infrared position sensing device (6), a cantilever positioning mechanism (7), and a movable auxiliary positioning mechanism (8), wherein the primary positioning mechanism (2), the blade tip positioning mechanism (3), the infrared sensing device (5), the infrared position sensing device (6), the cantilever positioning mechanism (7), and the movable auxiliary positioning mechanism (8) are all arranged on the base (1); The primary positioning mechanism (2) is used to perform primary positioning on the ceramic core (9); The blade tip positioning mechanism (3), the infrared sensing device (5), the infrared position sensing device (6), the cantilever positioning mechanism (7) and the movable auxiliary positioning mechanism (8) constitute a secondary positioning module, and the blade tip positioning mechanism (3), the infrared sensing device (5), the infrared position sensing device (6), the cantilever positioning mechanism (7) and the movable auxiliary positioning mechanism (8) cooperate with each other to realize the secondary positioning of the ceramic core (9); The infrared sensing device (5) and the infrared position sensing device (6) are respectively arranged on both sides of the blade tip positioning mechanism (3); the cantilever positioning mechanism (7) is arranged on the front side of the blade tip positioning mechanism (3); and the movable auxiliary positioning mechanism (8) can be moved to cooperate with the blade tip positioning mechanism (3) and the cantilever positioning mechanism (7) to clamp the ceramic core (9); The blade tip positioning mechanism (3) comprises: a first fixed block (31), a first blade tip supporting cylinder (36), a second blade tip supporting cylinder (37) and a third blade tip supporting cylinder (38), wherein the first fixed block (31) is arranged on the upper end surface of the base (1), the first blade tip supporting cylinder (36), the second blade tip supporting cylinder (37) and the third blade tip supporting cylinder (38) are all arranged on one side of the upper end surface of the first fixed block (31), and are sequentially arranged in a direction away from the movable auxiliary positioning mechanism (8) The third blade tip supporting cylinder (38), the second blade tip supporting cylinder (37) and the first blade tip supporting cylinder (36), the height of the first blade tip supporting cylinder (36) is greater than the height of the third blade tip supporting cylinder (38) and is greater than the height of the second blade tip supporting cylinder (37), the second blade tip supporting cylinder (37) and the third blade tip supporting cylinder (38) are used to contact the ceramic core blade tip (91), and the first blade tip supporting cylinder (36) is used to contact one side of the ceramic core blade tip (91); The primary positioning mechanism (2) comprises: a first positioning column (21) and a second positioning column (22), the first positioning column (21) and the second positioning column (22) are parallel to each other and are respectively installed vertically on the upper end surface of the base (1), and the first positioning column (21) and the second positioning column (22) are arranged at a distance; A groove (23) is provided at the top of each of the first positioning column (21) and the second positioning column (22), and the cross-sectional dimension of the groove (23) gradually decreases toward the base (1). The ceramic core (9) is placed between the first positioning column (21) and the second positioning column (22), and the groove (23) is used to support the ceramic core cantilever (94) and perform a primary positioning on the ceramic core cantilever (94); Two infrared position sensing devices (6) are provided in total, and both of the infrared position sensing devices (6) are provided on the same side of the blade tip positioning mechanism (3); the infrared position sensing device (6) comprises: a position sensing column (61) and a position sensor (62); the position sensing column (61) is provided on the other side of the first fixing block (31); one of the position sensors (62) is provided on the position sensing column (61) corresponding to the upper edge of the exhaust edge of the ceramic core blade (92); the other position sensor (62) is higher than the upper edge of the exhaust edge of the ceramic core blade (92) and is provided on the position sensing column (61); the position sensor (62) is used to check whether the ceramic core blade (92) is warped.

2. According to claim 1, a secondary positioning tool for a hollow turbine blade core, characterized in that: The blade tip positioning mechanism (3) further comprises: a T-shaped connection structure (33), a clamping block (34), a movable movable block (35) and a cylindrical platform (39); the T-shaped connection structure (33), the clamping block (34), the movable movable block (35) and the cylindrical platform (39) are all arranged on the upper end surface of the first fixed block (31); The upper end surface of the first fixed block (31) is provided with a slide groove, the movable block (35) is arranged in the slide groove and slides along the slide groove, and the two sides of the movable block (35) are respectively fixed to the upper end surface of the first fixed block (31) through a clamping block (34); One side of the movable movable block (35) in the sliding direction is connected to the T-shaped connection structure (33); the movable movable block (35) is arranged between the second blade tip support cylinder (37) and the T-shaped connection structure (33); an adjustable screw (32) is arranged at one end of the T-shaped connection structure (33) away from the movable movable block (35); The cylindrical platform (39) is arranged on a side of the first fixed block (31) close to the movable auxiliary positioning mechanism (8) and is used to support the movable auxiliary positioning mechanism (8).

3. According to claim 2, a secondary positioning tool for a hollow turbine blade core, characterized in that: Also includes: a position sensor (4) cooperating with the blade tip positioning mechanism (3), wherein the position sensor (4) is provided with a measuring head (41), and the measuring head (41) is arranged on a side of the movable movable block (35) facing away from the T-shaped connection structure (33); The adjustable screw (32) drives the movable movable block (35) to move to adjust the position of the measuring head (41), and the measuring head (41) is used to sense the position of the ceramic core blade tip (91) and output an alarm.

4. A secondary positioning tool for a hollow turbine blade core according to claim 2 or 3, characterized in that: The infrared sensing device (5) comprises: a sensing column (51) and a sensor (52), wherein the sensing column (51) is arranged on one side of the first fixing block (31), and the sensor (52) is arranged on the sensing column (51), and the sensor (52) is used to sense whether the ceramic core (9) is placed.

5. The secondary positioning tool for a hollow turbine blade core according to claim 3, characterized in that: The cantilever positioning mechanism (7) comprises: a second fixed block (71), a first cantilever support column (72), a second cantilever support column (73) and a cantilever side column positioning column (74); the second fixed block (71) is arranged on the base (1) at the front side of the blade tip positioning mechanism (3); the upper end surface of the second fixed block (71) is provided with the first cantilever support column (72), the second cantilever support column (73) and the cantilever side column positioning column (74) in sequence in a direction away from the movable auxiliary positioning mechanism (8); the first cantilever support column (72), the second cantilever support column (73) and the cantilever side column positioning column (74) are arranged in a colinear manner; the upper end surface of the second fixed block (71) which is not provided with the first cantilever support column (72), the second cantilever support column (73) and the cantilever side column positioning column (74) is used to support the movable auxiliary positioning mechanism (8); The first cantilever support column (72), the second cantilever support column (73) and the cantilever side column positioning column (74) are spaced apart from each other and arranged in parallel. The first cantilever support column (72) and the second cantilever support column (73) have the same height, and the cantilever side column positioning column (74) has a height higher than the first cantilever support column (72) and the second cantilever support column (73). The first cantilever support column (72) and the second cantilever support column (73) are used to support the bottom of the ceramic core cantilever (94), and the cantilever side column positioning column (74) is used to contact the side of the ceramic core cantilever (94).

6. A secondary positioning tool for a hollow turbine blade core according to claim 5, characterized in that: The movable auxiliary positioning mechanism (8) comprises: a cylinder slider (81), an L-shaped support plate (82), a cantilever side column (83), a symmetrical positioning column (84), a small positioning cylinder (85) and a blade tip auxiliary positioning column (86), wherein the cylinder slider (81) is arranged on the upper end surface of the base (1), and the movable end of the cylinder slider (81) is connected to the L-shaped support plate (82) for driving the L-shaped support plate (82) to move; The cantilever side column (83), the pair of symmetrical positioning columns (84) and the blade tip auxiliary positioning column (86) are all arranged on the upper end surface of the L-shaped support plate (82); A pair of the symmetrical positioning columns (84) are pushed by the L-shaped support plate (82) to be respectively arranged in one-to-one correspondence with the first cantilever support column (72) and the second cantilever support column (73); the symmetrical positioning columns (84) are also provided with the positioning small cylinder (85) on the front side close to the first cantilever support column (72) or the second cantilever support column (73); the positioning small cylinder (85) is used to be arranged in contact with one side of the length direction of the ceramic core (9); The cantilever side column (83) is pushed by the L-shaped support plate (82) to be arranged corresponding to the cantilever side column positioning column (74), and the cantilever side column (83) is used to be arranged in contact with the side surface of the ceramic core cantilever (94); The blade tip auxiliary positioning column (86) is pushed by the L-shaped support plate (82) to be arranged corresponding to the first blade tip support cylinder (36) and is used for being arranged in contact with the back side of the ceramic core blade tip (91).

7. A method for secondary positioning of a hollow turbine blade core, characterized in that: Using the secondary positioning tool for the hollow turbine blade core according to any one of claims 3 to 6, the steps are as follows: S1: clamping the cantilever part of the ceramic core and placing the ceramic core (9) into the primary positioning mechanism (2) for primary positioning; S2: After the primary positioning is completed, the ceramic core (9) is placed on the secondary positioning module, the ceramic core (9) is clamped by a movable auxiliary positioning mechanism (8) in the secondary positioning module, an infrared sensing device (5) is used to sense whether the ceramic core (9) is placed, an infrared position sensing device (6) is used to sense whether the ceramic core (9) is warped, a position sensor (4) is used to measure the length of the ceramic core (9), and it is confirmed whether the measurement result is within a set error range; S3: If any measurement result of the infrared sensing device (5), the infrared position sensing device (6) and the position sensor (4) does not meet the requirements, an alarm prompt is output; S4: If the measurement results of the infrared sensing device (5), the infrared position sensing device (6) and the position sensor (4) all meet the requirements, it means that the positioning test of the ceramic core (9) is qualified, and the movable auxiliary positioning mechanism (8) releases the clamping of the ceramic core (9) and puts the ceramic core (9) into the mold in this positioning posture.

8. A method for secondary positioning of a hollow turbine blade core according to claim 7, characterized in that: Before placing the ceramic core (9) on the secondary positioning module for secondary positioning, it is also necessary to adjust the position of the measuring head (41) provided on the blade tip positioning mechanism (3) so that the measuring head (41) contacts the end of the ceramic core blade tip (91).

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