Positioning device and method for ensuring perpendicularity of blade in working blade wax mold module

Abstract

The invention discloses a positioning device and method for ensuring the perpendicularity of a blade in a working blade wax pattern module. In the positioning device, a support frame is vertically fixed on a base through a fastening bolt; and the transition section positioning block, the first group of blade positioning blocks, the second group of blade positioning blocks and the third group of blade positioning blocks are vertically fixed on the support frame in sequence from bottom to top through fastening bolts respectively. The positioning method comprises the following steps: assembling a positioning device according to a designed connection relation; the module base plate is arranged on the module assembling rotating disc, the positioning faces of the module assembling rotating disc and the module base plate are matched with the side faces of the module assembling rotating disc and the module base plate correspondingly, and the position of the positioning device is determined; and the positioning surfaces of the crystal selector, the transition section and the three groups of blades are respectively attached to the crystal selector, the transition section and the three groups of blades, so that the positions of the crystal selector, the transition section and the three groups of blades are determined. According to the tool, the perpendicularity of the blade in the wax mold combination process can be ensured, the combination efficiency is improved, and high universality is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of precision casting, and particularly relates to a positioning device and method for ensuring the perpendicularity of blades in a wax mold module of a working blade. Background Technique

[0002] Turbine blades are important hot-end components of aero power plants and gas turbines. They are long-term subjected to the action of ultra-high temperature, high pressure, and complex alternating loads. The manufacturing precision of turbine blades directly affects the performance and reliability of the engine.

[0003] At present, investment precision casting technology is usually used to manufacture turbine blades. After the wax mold of the blade is pressed, a wax mold module needs to be made. The wax mold module consists of blades, a module chassis, a crystal selector, a transition section, a runner, etc. The perpendicularity of the blade relative to the module chassis greatly affects the quality of the blade casting, and the consistency of the blade casting quality is affected by the consistency of its relative position during mold assembly.

[0004] However, there are many problems in the current combination of wax mold modules: (1) It is impossible to ensure the perpendicularity of the blade relative to the module chassis. During the mold assembly process, the wax molds of several blades, the module chassis, the spiral crystal selector, the transition section, and the runner need to be manually spliced, and the perpendicularity of the blade relative to the module chassis is judged by the naked eye. This method is greatly affected by the observation angle and human factors. (2) The mold assembly efficiency is relatively low. A large amount of time is spent on adjusting the relative position of the blades during the manual splicing process of mold assembly. (3) The versatility of the mold assembly tooling needs to be improved. The differences in the application scenarios of the blades determine that the shapes of the blades are different, so the mold assembly tooling for each type of blade has its particularity and incompatibility in use, which greatly increases the manufacturing cost.

[0005] How to reduce the influence of human factors during the mold assembly process to ensure the perpendicularity of the turbine blade relative to the mold base, how to improve the mold assembly efficiency and the versatility of the mold assembly tooling are the key links to improve the quality and output of turbine blade castings and reduce the manufacturing cost. Therefore, it is urgent to develop a positioning device and method to ensure the perpendicularity of the blades in the wax mold module of the working blade, and solve this problem. The invention patent with the application publication number of CN105290329A discloses a general single-crystal turbine working blade module combination positioning method, and the method is as follows: position the middle column tube between the base and the upper disc through the positioning pin and the positioning groove; the central axis of the blade positioning boss on the base and the center line of the semi-circular notch at the corresponding position of the upper disc are on the same straight line, fix the spiral crystal selector on the blade positioning boss, and fix the hollow ceramic tube at the semi-circular notch; fix the bottom and top of the blade wax part on the spiral crystal selector and the hollow ceramic tube, so as to ensure the perpendicularity of the blade during the module combination process. The technical solution has the following defects: (1) It is only applicable to the fixation of a single blade in a single layer, that is, there is only one layer of blades, and one crystal selector is only connected to one blade; (2) Although the blade positioning boss and the semi-circular notch are set in advance at fixed positions, fixing the spiral crystal selector and the hollow ceramic tube on the blade positioning boss and at the semi-circular notch both require manual positioning, and further fixing the bottom and top of the blade wax part on the spiral crystal selector and the hollow ceramic tube still requires manual positioning. Once human factors intervene, large errors will be generated, and it is very difficult to ensure the perpendicularity of the blade. Summary of the Invention

[0006] To solve the problems existing in the prior art, the present invention provides a positioning device for ensuring the perpendicularity of the blades in the wax mold module of the working blade. The positioning device includes a base, a support frame, a transition section positioning block, a first group of blade positioning blocks, a second group of blade positioning blocks, a third group of blade positioning blocks and a plurality of fastening bolts. The support frame is vertically fixed on the base through the fastening bolts, and the transition section positioning block, the first group of blade positioning blocks, the second group of blade positioning blocks and the third group of blade positioning blocks are respectively vertically fixed on the support frame from bottom to top through the fastening bolts.

[0007] Preferably, the positioning device is used to position the installation position of the blades in the wax mold module to ensure the perpendicularity of the blades during the wax mold combination process; the wax mold module sequentially includes a mold assembly turntable, a mold base, a crystal selector, a transition section, a first group of blades, a second group of blades, a third group of blades and a runner from bottom to top. The first group of blades, the second group of blades and the third group of blades each include three blades; the back side edge plate and the front edge end plate of the blade face the positioning device.

[0008] Preferably, in any of the above solutions, the top and bottom surfaces of the base are both flat planes, one side surface of the base is a flat plane perpendicular to the top and bottom surfaces, and the other side surface is a stepped arc surface; the stepped arc surface successively includes a mold assembly turntable positioning surface, a mold base positioning surface, and a crystal selector positioning surface from bottom to top, and the mold assembly turntable positioning surface, the mold base positioning surface, and the crystal selector positioning surface respectively coincide with the side surfaces of the mold assembly turntable, the mold base, and the crystal selector.

[0009] A groove is provided on one side of the top surface of the base close to the stepped arc surface, and two bolt holes are provided in the groove. One bolt hole vertically penetrates to the bottom surface of the base, and the other bolt hole vertically penetrates to the bottom surface of the step where the mold base positioning surface is located.

[0010] Preferably, in any of the above solutions, a boss is provided at the bottom of the support frame, and two bolt holes are provided on the bottom surface of the boss. The two bolt holes on the bottom surface of the boss are aligned with the two bolt holes in the groove. The boss is vertically inserted into the groove, and the support frame is fixed on the top surface of the base by fastening bolts; three bolt holes are provided on the top surface of the support frame.

[0011] Preferably, in any of the above solutions, the side surface of the support frame facing the wax mold module is perpendicular to the base, and a transition section positioning groove, a first set of blade positioning grooves, and a second set of blade positioning grooves are successively and horizontally provided on this side surface from bottom to top.

[0012] The side surface of the support frame away from the wax mold module is an inclined surface, and three bolt holes are successively and horizontally provided on this side surface from bottom to top. The three bolt holes respectively correspond to the transition section positioning groove, the first set of blade positioning grooves, and the second set of blade positioning grooves, and the three bolt holes horizontally penetrate into the interior of the transition section positioning groove, the first set of blade positioning grooves, and the second set of blade positioning grooves.

[0013] Preferably, in any of the above solutions, the transition section positioning block is cuboid-shaped, bolt holes are provided on the side surface of its fixed end, the side surface of its positioning end is a transition section positioning surface, the fixed end is inserted into the transition section positioning groove, and the transition section positioning block is fixed on the side surface of the support frame by fastening bolts, and the transition section positioning surface is attached to the side surface of the transition section.

[0014] Preferably, in any of the above solutions, the first set of blade positioning blocks are integrally formed by a first fixed boss and a first toothed structure. Bolt holes are provided on the side surface of the first fixed boss. The first fixed boss is inserted into the first set of blade positioning grooves, and the first set of blade positioning blocks are fixed on the side surface of the support frame by fastening bolts.

[0015] One side of the first tooth-shaped structure is the positioning surface of the back side edge plate of the first group of blades, and the other side is the positioning surface of the leading edge end edge plate of the first group of blades. The positioning surface of the back side edge plate of the first group of blades is attached to the side surface of the back side edge plate of the first group of blades, and the positioning surface of the leading edge end edge plate of the first group of blades is attached to the side surface of the leading edge end edge plate of the first group of blades.

[0016] In any of the above solutions, preferably, the second group of blade positioning blocks are integrally formed by a second fixed boss and a second tooth-shaped structure. Bolt holes are provided on the side surface of the second fixed boss. The second fixed boss is inserted into the second group of blade positioning grooves, and the second group of blade positioning blocks are fixed on the side surface of the support frame by fastening bolts.

[0017] One side of the second tooth-shaped structure is the positioning surface of the back side edge plate of the second group of blades, and the other side is the positioning surface of the leading edge end edge plate of the second group of blades. The positioning surface of the back side edge plate of the second group of blades is attached to the side surface of the back side edge plate of the second group of blades, and the positioning surface of the leading edge end edge plate of the second group of blades is attached to the side surface of the leading edge end edge plate of the second group of blades.

[0018] In any of the above solutions, preferably, the third group of blade positioning blocks are integrally formed by a third fixed boss and a third tooth-shaped structure. Three bolt holes are provided on the third fixed boss. The three bolt holes on the third fixed boss are aligned with the three bolt holes on the top surface of the support frame. The third fixed boss is placed on the top surface of the support frame, and the third group of blade positioning blocks are fixed on the top surface of the support frame by fastening bolts.

[0019] One side of the third tooth-shaped structure is the positioning surface of the back side edge plate of the third group of blades, and the other side is the positioning surface of the leading edge end edge plate of the third group of blades. The positioning surface of the back side edge plate of the third group of blades is attached to the side surface of the back side edge plate of the third group of blades, and the positioning surface of the leading edge end edge plate of the third group of blades is attached to the side surface of the leading edge end edge plate of the third group of blades.

[0020] The present invention also provides a positioning method for ensuring the perpendicularity of blades in a working blade wax mold module. Using the positioning device for ensuring the perpendicularity of blades in a working blade wax mold module described in any one of the above, it includes the following steps in sequence: Step 1: Assemble the components of the positioning device according to the designed connection relationship. Specifically, first insert the boss at the bottom of the support frame into the groove on the top surface of the base, and fix the support frame on the top surface of the base with fastening bolts; second, insert the fixed end of the transition section positioning block into the transition section positioning groove, and fix the transition section positioning block on the side of the support frame with fastening bolts; then insert the first fixed boss of the first group of blade positioning blocks and the second fixed boss of the second group of blade positioning blocks into the first group of blade positioning grooves and the second group of blade positioning grooves respectively, and fix the first group of blade positioning blocks and the second group of blade positioning blocks on the side of the support frame with fastening bolts respectively; finally, place the third fixed boss of the third group of blade positioning blocks on the top surface of the support frame, and fix the third group of blade positioning blocks on the top surface of the support frame with fastening bolts. Step 2: Prepare the components for assembling the wax mold module, including a mold assembly turntable, a module chassis, a crystal selector, a transition section, a first group of blades, a second group of blades, a third group of blades, and a runner. The first group of blades, the second group of blades, and the third group of blades each include three blades; place the module chassis on the mold assembly turntable, and make the central axis of the module chassis coincide with the central axis of the mold assembly turntable. Step 3: Align the mold assembly turntable positioning surface of the positioning device and the module chassis positioning surface with the side surface of the mold assembly turntable and the side surface of the module chassis respectively to determine the position of the positioning device relative to the module chassis. Step 4: Place the crystal selector on the module chassis, and make the side surface of the crystal selector coincide with the crystal selector positioning surface of the positioning device to determine the installation position of the crystal selector on the module chassis, and then fixedly connect the crystal selector to the module chassis. Step 5: Align the bottom of the transition section with the top of the crystal selector, and make the side surface of the transition section fit with the transition section positioning surface of the positioning device to determine the installation position of the transition section on the top of the crystal selector, and then fixedly connect the bottom of the transition section to the top of the crystal selector. Step 6: Align the bottoms of the three blades in the first group of blades with the top of the transition section respectively, and make the side surface of the back edge plate of the blade fit with the back edge plate positioning surface of the first group of blades of the positioning device, the side surface of the front edge end plate fit with the front edge end plate positioning surface of the first group of blades of the positioning device, and the three blades respectively fit with their corresponding first tooth-shaped structures to determine the installation positions of the three blades in the first group of blades on the top of the transition section, and then fixedly connect the bottoms of the three blades in the first group of blades to the top of the transition section respectively. Step 7: Align the bottoms of the three blades in the second group with the tops of the three blades in the first group respectively, and make the side surfaces of the back-side edge plates of the blades fit with the positioning surfaces of the back-side edge plates of the second group of blades of the positioning device, and the side surfaces of the front-edge end plates fit with the positioning surfaces of the front-edge end plates of the second group of blades of the positioning device. The three blades respectively fit with their corresponding second toothed structures to determine the installation positions of the three blades in the second group on the tops of the three blades in the first group. Then, fixedly connect the bottoms of the three blades in the second group with the tops of the three blades in the first group respectively; Step 8: Align the bottoms of the three blades in the third group with the tops of the three blades in the second group respectively, and make the side surfaces of the back-side edge plates of the blades fit with the positioning surfaces of the back-side edge plates of the third group of blades of the positioning device, and the side surfaces of the front-edge end plates fit with the positioning surfaces of the front-edge end plates of the third group of blades of the positioning device. The three blades respectively fit with their corresponding third toothed structures to determine the installation positions of the three blades in the third group on the tops of the three blades in the second group. Then, fixedly connect the bottoms of the three blades in the third group with the tops of the three blades in the second group respectively; Step 9: Fixedly connect the bottom of the runner with the tops of the three blades in the third group, thus completing the combination of the wax mold module. In this wax mold module, it can be ensured that the blades have good perpendicularity.

[0021] The perpendicularity of the blade involved in the present invention, that is, the axis of the blade is perpendicular to the reference plane of the module chassis. Specifically, the top surface of the tenon in the working blade is parallel to the upper surface of the module chassis in the wax mold module, and the axis of the blade is perpendicular to both the top surface of the tenon and the upper surface of the module chassis at the same time.

[0022] In the present invention, a number of bolt holes are provided on the positioning device, such as in the groove on the top surface of the base, on the bottom surface of the bottom boss of the support frame, on the top surface of the support frame, on the inclined surface of the support frame, on the third fixing boss of the third group of blade positioning blocks, etc. According to the different positions of the bolt holes, the diameters and lengths of the respective bolt holes are different. The present invention uniformly refers to them as bolt holes; at the same time, a number of fastening bolts are also used. The bolt holes in different positions use the corresponding fastening bolts, and the present invention uniformly refers to them as fastening bolts.

[0023] The positioning device and method for ensuring the perpendicularity of the blades in the working blade wax mold module of the present invention have the following beneficial effects: (1) The present invention can ensure that the working blades have good perpendicularity with respect to the module chassis. The position of the positioning device is determined by the coincidence of the side surfaces of the module assembly turntable and the module chassis with the positioning surfaces of the module assembly turntable and the module chassis. The position of the crystal selector is determined by the coincidence of the crystal selector positioning surface with the side surface of the crystal selector. The positions of the transition section and the three groups of blade positioning blocks are determined by the fitting of the positioning surfaces on the transition section and the three groups of blade positioning blocks with the transition section and the three groups of blades, thereby ensuring the perpendicularity of the working blades and the module chassis and avoiding the influence of human factors on the blade perpendicularity.

[0024] (2) The present invention improves the module assembly efficiency of the wax mold module and the quality of the blade casting. Using the positioning device of the present invention can save the time for aligning the positions of the crystal selector, the transition section, and the three groups of blades, improving the module assembly efficiency. Compared with manually adjusting the positions of the crystal selector, the transition section, and the blades, this positioning device can ensure the consistency of each wax mold module and improve the quality of the blade casting.

[0025] (3) The present invention can effectively reduce costs. When using the positioning device of the present invention, the positioning blocks can be modified or replaced according to different working blades, thereby realizing the universality of the positioning device and effectively reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic structural diagram of the positioning device in a preferred embodiment of the positioning device and method for ensuring the perpendicularity of blades in a working blade wax mold module according to the present invention; Figure 2 For Figure 1 Front view of the positioning device in the illustrated embodiment; Figure 3 For Figure 1 Schematic structural diagram of the base in the illustrated embodiment; Figure 4 For Figure 1 Front view of the base in the illustrated embodiment; Figure 5 For Figure 1 Schematic structural diagram of the support frame in the illustrated embodiment; Figure 6 For Figure 1 Front view of the support frame in the illustrated embodiment; Figure 7 For Figure 1 Schematic structural diagram of the transition section positioning block in the illustrated embodiment; Figure 8 For Figure 1 Schematic structural diagram of the first group of blade positioning blocks in the illustrated embodiment; Figure 9 For Figure 1 Schematic structural diagram of the second group of blade positioning blocks in the illustrated embodiment; Figure 10 In Figure 1 the structure schematic diagram of the third group of blade positioning blocks in the illustrated embodiment; Figure 11 In Figure 1 the structure schematic diagram of the wax pattern module in the illustrated embodiment; Figure 12 In Figure 1 the schematic diagram after the positioning device is matched with the wax pattern module in the illustrated embodiment.

[0027] Description of the markings in the figure: 1 - Base, 101 - Group mold turntable positioning surface, 102 - Mold base chassis positioning surface, 103 - Crystal selector positioning surface, 104 - Groove; 2 - Support frame, 201 - Boss, 202 - Transition section positioning groove, 203 - First group of blade positioning grooves, 204 - Second group of blade positioning grooves; 3 - Transition section positioning block, 301 - Fixed end, 302 - Transition section positioning surface; 4 - First group of blade positioning blocks, 401 - First fixed boss, 402 - First tooth-shaped structure, 403 - First group of blade back side edge plate positioning surface, 404 - First group of blade leading edge end edge plate positioning surface; 5 - Second group of blade positioning blocks, 501 - Second fixed boss, 502 - Second tooth-shaped structure, 503 - Second group of blade back side edge plate positioning surface, 504 - Second group of blade leading edge end edge plate positioning surface; 6 - Third group of blade positioning blocks, 601 - Third fixed boss, 602 - Third tooth-shaped structure, 603 - Third group of blade back side edge plate positioning surface, 604 - Third group of blade leading edge end edge plate positioning surface; 7 - Fastening bolt; 8 - Bolt hole; 9 - Wax pattern module, 901 - Group mold turntable, 902 - Mold base chassis, 903 - Crystal selector, 904 - Transition section, 905 - First group of blades, 906 - Second group of blades, 907 - Third group of blades, 908 - Runner, 909 - Back side edge plate, 910 - Leading edge end edge plate. Specific embodiments

[0028] In order to further understand the content of the present invention, the present invention will be elaborated in detail below in combination with specific embodiments.

[0029] As Figure 1-10As shown, in a preferred embodiment of the positioning device for ensuring the perpendicularity of blades in a working blade wax mold module according to the present invention, the positioning device includes a base 1, a support frame 2, a transition section positioning block 3, a first group of blade positioning blocks 4, a second group of blade positioning blocks 5, a third group of blade positioning blocks 6, and a plurality of fastening bolts 7. The support frame 2 is vertically fixed on the base 1 through the fastening bolts 7. The transition section positioning block 3, the first group of blade positioning blocks 4, the second group of blade positioning blocks 5, and the third group of blade positioning blocks 6 are respectively vertically fixed on the support frame 2 from bottom to top through the fastening bolts 7.

[0030] The positioning device is used to position the installation positions of the blades in the wax mold module to ensure the perpendicularity of the blades during the wax mold combination process. The wax mold module 9 successively includes a mold assembly turntable 901, a module chassis 902, a crystal selector 903, a transition section 904, a first group of blades 905, a second group of blades 906, a third group of blades 907, and a runner 908 from bottom to top. The first group of blades 905, the second group of blades 906, and the third group of blades 907 each include three blades. The back side edge plate 909 and the front edge end plate 910 of the blade face the positioning device.

[0031] The top surface and the bottom surface of the base 1 are both flat surfaces. One side surface of the base 1 is a flat surface perpendicular to the top surface and the bottom surface, and the other side surface is a stepped arc surface. The stepped arc surface successively includes a mold assembly turntable positioning surface 101, a module chassis positioning surface 102, and a crystal selector positioning surface 103 from bottom to top. The mold assembly turntable positioning surface 101, the module chassis positioning surface 102, and the crystal selector positioning surface 103 respectively coincide with the side surfaces of the mold assembly turntable 901, the module chassis 902, and the crystal selector 903.

[0032] A groove 104 is provided on the top surface of the base 1 near the stepped arc surface. Two bolt holes 8 are provided in the groove 104. One bolt hole 8 vertically penetrates to the bottom surface of the base 1, and the other bolt hole 8 vertically penetrates to the bottom surface of the step where the module chassis positioning surface 102 is located.

[0033] A boss 201 is provided at the bottom of the support frame 2. Two bolt holes 8 are provided on the bottom surface of the boss 201. The two bolt holes 8 on the bottom surface of the boss 201 are aligned with the two bolt holes 8 in the groove 104. The boss 201 is vertically inserted into the groove 104, and the support frame 2 is fixed on the top surface of the base 1 through the fastening bolts 7. Three bolt holes 8 are provided on the top surface of the support frame 2.

[0034] The side of the support frame 2 facing the wax mold module 9 is perpendicular to the base 1. On this side, a transition section positioning groove 202, a first set of blade positioning grooves 203, and a second set of blade positioning grooves 204 are horizontally arranged in sequence from bottom to top.

[0035] The side of the support frame 2 away from the wax mold module 9 is an inclined surface. On this side, three bolt holes 8 are horizontally arranged in sequence from bottom to top. The three bolt holes 8 respectively correspond to the transition section positioning groove 202, the first set of blade positioning grooves 203, and the second set of blade positioning grooves 204, and the three bolt holes 8 horizontally penetrate into the interiors of the transition section positioning groove 202, the first set of blade positioning grooves 203, and the second set of blade positioning grooves 204.

[0036] The transition section positioning block 3 is in the shape of a cuboid. A bolt hole 8 is provided on the side of its fixed end 301, and the side of its positioning end is a transition section positioning surface 302. The fixed end 301 is inserted into the transition section positioning groove 202, and the transition section positioning block 3 is fixed on the side of the support frame 2 through a fastening bolt 7. The transition section positioning surface 302 is attached to the side of the transition section 904.

[0037] The first set of blade positioning blocks 4 are integrally formed by a first fixed boss 401 and a first toothed structure 402. A bolt hole 8 is provided on the side of the first fixed boss 401. The first fixed boss 401 is inserted into the first set of blade positioning grooves 203, and the first set of blade positioning blocks 4 are fixed on the side of the support frame 2 through a fastening bolt 7.

[0038] One side of the first toothed structure 402 is a first set of blade back side edge plate positioning surface 403, and the other side is a first set of blade leading edge end edge plate positioning surface 404. The first set of blade back side edge plate positioning surface 403 is attached to the side of the back side edge plate 909 of the first set of blades 905, and the first set of blade leading edge end edge plate positioning surface 404 is attached to the side of the leading edge end edge plate 910 of the first set of blades 905.

[0039] The second set of blade positioning blocks 5 are integrally formed by a second fixed boss 501 and a second toothed structure 502. A bolt hole 8 is provided on the side of the second fixed boss 501. The second fixed boss 501 is inserted into the second set of blade positioning grooves 204, and the second set of blade positioning blocks 5 are fixed on the side of the support frame 2 through a fastening bolt 7.

[0040] One side of the second tooth-shaped structure 502 is the positioning surface 503 for the trailing edge side plate of the second group of blades, and the other side is the positioning surface 504 for the leading edge end plate of the second group of blades. The positioning surface 503 for the trailing edge side plate of the second group of blades is in contact with the side surface of the trailing edge side plate 909 of the second group of blades 906, and the positioning surface 504 for the leading edge end plate of the second group of blades is in contact with the side surface of the leading edge end plate 910 of the second group of blades 906.

[0041] The third group of blade positioning blocks 6 are integrally formed by a third fixing boss 601 and a third tooth-shaped structure 602. Three bolt holes 8 are provided on the third fixing boss 601. The three bolt holes 8 on the third fixing boss 601 are aligned with the three bolt holes 8 on the top surface of the support frame 2. The third fixing boss 601 is placed on the top surface of the support frame 2, and the third group of blade positioning blocks 6 are fixed on the top surface of the support frame 2 by fastening bolts 7.

[0042] One side of the third tooth-shaped structure 602 is the positioning surface 603 for the trailing edge side plate of the third group of blades, and the other side is the positioning surface 604 for the leading edge end plate of the third group of blades. The positioning surface 603 for the trailing edge side plate of the third group of blades is in contact with the side surface 909 of the trailing edge side plate of the third group of blades 907, and the positioning surface 604 for the leading edge end plate of the third group of blades is in contact with the side surface of the leading edge end plate 910 of the third group of blades 907.

[0043] This embodiment also provides a positioning method for ensuring the perpendicularity of the blades in the working blade wax mold module. Using the above positioning device for ensuring the perpendicularity of the blades in the working blade wax mold module, it includes the following steps in sequence: Step 1: Assemble the various components of the positioning device according to the designed connection relationship. The specific operation is as follows: First, insert the boss at the bottom of the support frame into the groove on the top surface of the base, and fix the support frame on the top surface of the base by fastening bolts; Second, insert the fixed end of the transition section positioning block into the transition section positioning groove, and fix the transition section positioning block on the side surface of the support frame by fastening bolts; Then, insert the first fixing boss of the first group of blade positioning blocks and the second fixing boss of the second group of blade positioning blocks into the first group of blade positioning grooves and the second group of blade positioning grooves respectively, and fix the first group of blade positioning blocks and the second group of blade positioning blocks on the side surface of the support frame by fastening bolts respectively; Finally, place the third fixing boss of the third group of blade positioning blocks on the top surface of the support frame, and fix the third group of blade positioning blocks on the top surface of the support frame by fastening bolts. Step 2: Prepare the components for assembling the wax mold modules, including a mold assembling turntable, a module chassis, a crystal selector, a transition section, a first set of blades, a second set of blades, a third set of blades, and a runner. The first set of blades, the second set of blades, and the third set of blades each include three blades. Place the module chassis on the mold assembling turntable and align the central axis of the module chassis with the central axis of the mold assembling turntable on the same straight line. Step 3: Align the mold assembling turntable positioning surface and the module chassis positioning surface of the positioning device with the side surface of the mold assembling turntable and the side surface of the module chassis respectively to determine the position of the positioning device relative to the module chassis. Step 4: Place the crystal selector on the module chassis and align the side surface of the crystal selector with the crystal selector positioning surface of the positioning device to determine the installation position of the crystal selector on the module chassis. Then fixedly connect the crystal selector to the module chassis. Step 5: Align the bottom of the transition section with the top of the crystal selector and make the side surface of the transition section fit with the transition section positioning surface of the positioning device to determine the installation position of the transition section on the top of the crystal selector. Then fixedly connect the bottom of the transition section to the top of the crystal selector. Step 6: Align the bottoms of the three blades in the first set of blades with the top of the transition section respectively, and make the side surface of the back edge plate of the blade fit with the back edge plate positioning surface of the first set of blades of the positioning device, and the side surface of the front edge end plate fit with the front edge end plate positioning surface of the first set of blades of the positioning device. The three blades respectively fit with their corresponding first tooth-shaped structures to determine the installation positions of the three blades in the first set of blades on the top of the transition section. Then fixedly connect the bottoms of the three blades in the first set of blades to the top of the transition section respectively. Step 7: Align the bottoms of the three blades in the second set of blades with the tops of the three blades in the first set of blades respectively, and make the side surface of the back edge plate of the blade fit with the back edge plate positioning surface of the second set of blades of the positioning device, and the side surface of the front edge end plate fit with the front edge end plate positioning surface of the second set of blades of the positioning device. The three blades respectively fit with their corresponding second tooth-shaped structures to determine the installation positions of the three blades in the second set of blades on the tops of the three blades in the first set of blades. Then fixedly connect the bottoms of the three blades in the second set of blades to the tops of the three blades in the first set of blades respectively. Step 8: Align the bottoms of the three blades in the third set of blades with the tops of the three blades in the second set of blades respectively, and make the side surface of the back edge plate of the blade fit with the back edge plate positioning surface of the third set of blades of the positioning device, and the side surface of the front edge end plate fit with the front edge end plate positioning surface of the third set of blades of the positioning device. The three blades respectively fit with their corresponding third tooth-shaped structures to determine the installation positions of the three blades in the third set of blades on the tops of the three blades in the second set of blades. Then fixedly connect the bottoms of the three blades in the third set of blades to the tops of the three blades in the second set of blades respectively. Step 9: Fix the bottom of the runner to the tops of the three blades in the third group of blades, thus completing the combination of the wax pattern module group, in which the good perpendicularity of the blades can be ensured.

[0044] The perpendicularity of the blades involved in this embodiment, that is, the axis of the blade is perpendicular to the reference plane of the module chassis. Specifically, the top surface of the tenon in the working blade is parallel to the upper surface of the module chassis in the wax pattern module group, and the axis of the blade is perpendicular to both the top surface of the tenon and the upper surface of the module chassis at the same time.

[0045] In this embodiment, a number of bolt holes are provided on the positioning device, such as in the groove on the top surface of the base, on the bottom surface of the boss at the bottom of the support frame, on the top surface of the support frame, on the inclined surface of the support frame, on the third fixing boss of the third group of blade positioning blocks, etc. According to the different positions of the bolt holes, the diameters and lengths of the respective bolt holes are different. In this embodiment, they are uniformly referred to as bolt holes; at the same time, a number of fastening bolts are also used, and the bolt holes at different positions use the corresponding fastening bolts, which are uniformly referred to as fastening bolts in this embodiment.

[0046] The positioning device and method for ensuring the perpendicularity of the blades in the working blade wax pattern module group of this embodiment can ensure that the working blades have good perpendicularity relative to the module chassis, avoid the influence of human factors, improve the module assembly efficiency of the wax pattern module group and the quality of the blade castings, and at the same time can effectively reduce costs and realize the universality of the positioning device.

[0047] Special note: Many parameters are involved in the technical solution of the present invention. It is necessary to comprehensively consider the synergistic effects among the various parameters to obtain the beneficial effects and remarkable progress of the present invention. Moreover, the value ranges of the various parameters in the technical solution are obtained through a large number of experiments. For each parameter and the mutual combination of the various parameters, the inventor has recorded a large amount of experimental data. Due to space limitations, the specific experimental data are not disclosed here.

[0048] It is not difficult for those skilled in the art to understand that the present invention includes any combination of the inventive content and the specific implementation part of the present invention specification and the various parts shown in the drawings. Due to space limitations and to make the specification concise, the various solutions formed by these combinations are not described one by one. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A positioning device for ensuring the perpendicularity of blades in a wax mold module of working blades, characterized in that: The positioning device includes a base, a support frame, a transition section positioning block, a first group of blade positioning blocks, a second group of blade positioning blocks, a third group of blade positioning blocks, and a number of fastening bolts. The support frame is vertically fixed on the base through the fastening bolts. The transition section positioning block, the first group of blade positioning blocks, the second group of blade positioning blocks, and the third group of blade positioning blocks are respectively vertically fixed on the support frame from bottom to top in sequence through the fastening bolts.

2. The positioning device for ensuring the perpendicularity of blades in the wax mold module of working blades according to claim 1, wherein: The positioning device is used to position the installation positions of the blades in the wax mold module to ensure the perpendicularity of the blades during the wax mold combination process. The wax mold module sequentially includes a mold assembling turntable, a module chassis, a crystal selector, a transition section, a first group of blades, a second group of blades, a third group of blades, and a runner from bottom to top. The first group of blades, the second group of blades, and the third group of blades each include three blades. The trailing edge plates and leading edge end plates of the blades face the positioning device.

3. The positioning device for ensuring the perpendicularity of blades in a working blade wax mold module according to claim 2, characterized in that: The top surface and the bottom surface of the base are both flat. One side surface of the base is a flat surface perpendicular to the top surface and the bottom surface, and the other side surface is a stepped arc surface. The stepped arc surface sequentially includes a mold assembling turntable positioning surface, a module chassis positioning surface, and a crystal selector positioning surface from bottom to top. The mold assembling turntable positioning surface, the module chassis positioning surface, and the crystal selector positioning surface respectively coincide with the side surfaces of the mold assembling turntable, the module chassis, and the crystal selector. A groove is provided on one side of the top surface of the base near the stepped arc surface. Two bolt holes are provided in the groove. One bolt hole vertically penetrates to the bottom surface of the base, and the other bolt hole vertically penetrates to the bottom surface of the step where the module chassis positioning surface is located.

4. The positioning device for ensuring the perpendicularity of blades in a wax mold module of working blades according to claim 3, characterized in that: A boss is provided at the bottom of the support frame. Two bolt holes are provided on the bottom surface of the boss. The two bolt holes on the bottom surface of the boss are aligned with the two bolt holes in the groove. The boss is vertically inserted into the groove, and the support frame is fixed on the top surface of the base through the fastening bolts. Three bolt holes are provided on the top surface of the support frame.

5. The positioning device for ensuring the perpendicularity of blades in a working blade wax mold module according to claim 4, characterized in that: The side surface of the support frame facing the wax mold module is perpendicular to the base. A transition section positioning groove, a first group of blade positioning grooves, and a second group of blade positioning grooves are horizontally arranged in sequence from bottom to top on this side surface. The side surface of the support frame away from the wax mold module is an inclined surface. Three bolt holes are horizontally arranged in sequence from bottom to top on this side surface. The three bolt holes respectively correspond to the transition section positioning groove, the first group of blade positioning grooves, and the second group of blade positioning grooves, and the three bolt holes horizontally penetrate into the interior of the transition section positioning groove, the first group of blade positioning grooves, and the second group of blade positioning grooves.

6. The positioning device for ensuring the perpendicularity of blades in a working blade wax mold module according to claim 5, characterized in that: The transition section positioning block is cuboid-shaped. A bolt hole is provided on the side surface of its fixed end. The side surface of its positioning end is a transition section positioning surface. The fixed end is inserted into the transition section positioning groove, and the transition section positioning block is fixed on the side surface of the support frame through the fastening bolts. The transition section positioning surface is attached to the side surface of the transition section.

7. The positioning device for ensuring the perpendicularity of blades in a wax mold module of working blades according to claim 6, characterized in that: The first set of blade positioning blocks is integrally formed by a first fixing boss and a first toothed structure. A bolt hole is provided on the side surface of the first fixing boss. The first fixing boss is inserted into the first set of blade positioning grooves, and the first set of blade positioning blocks is fixed on the side surface of the support frame through fastening bolts; One side surface of the first toothed structure is the positioning surface for the back side edge plate of the first set of blades, and the other side surface is the positioning surface for the leading edge end edge plate of the first set of blades. The positioning surface for the back side edge plate of the first set of blades is attached to the side surface of the back side edge plate of the first set of blades, and the positioning surface for the leading edge end edge plate of the first set of blades is attached to the side surface of the leading edge end edge plate of the first set of blades.

8. The positioning device for ensuring the perpendicularity of blades in a wax mold module of working blades according to claim 7, characterized in that: The second set of blade positioning blocks is integrally formed by a second fixing boss and a second toothed structure. A bolt hole is provided on the side surface of the second fixing boss. The second fixing boss is inserted into the second set of blade positioning grooves, and the second set of blade positioning blocks is fixed on the side surface of the support frame through fastening bolts; One side surface of the second toothed structure is the positioning surface for the back side edge plate of the second set of blades, and the other side surface is the positioning surface for the leading edge end edge plate of the second set of blades. The positioning surface for the back side edge plate of the second set of blades is attached to the side surface of the back side edge plate of the second set of blades, and the positioning surface for the leading edge end edge plate of the second set of blades is attached to the side surface of the leading edge end edge plate of the second set of blades.

9. The positioning device for ensuring the perpendicularity of blades in a working blade wax mold module according to claim 8, wherein: The third set of blade positioning blocks is integrally formed by a third fixing boss and a third toothed structure. Three bolt holes are provided on the third fixing boss. The three bolt holes on the third fixing boss are aligned with the three bolt holes on the top surface of the support frame. The third fixing boss is placed on the top surface of the support frame, and the third set of blade positioning blocks is fixed on the top surface of the support frame through fastening bolts; One side surface of the third toothed structure is the positioning surface for the back side edge plate of the third set of blades, and the other side surface is the positioning surface for the leading edge end edge plate of the third set of blades. The positioning surface for the back side edge plate of the third set of blades is attached to the side surface of the back side edge plate of the third set of blades, and the positioning surface for the leading edge end edge plate of the third set of blades is attached to the side surface of the leading edge end edge plate of the third set of blades.

10. A positioning method for ensuring the perpendicularity of blades in a wax mold module of working blades, characterized in that: Using the positioning device for ensuring the perpendicularity of blades in the working blade wax mold module according to any one of claims 1-9, the following steps are included in sequence, Step 1: Assemble the components of the positioning device according to the designed connection relationship. Specifically, first insert the boss at the bottom of the support frame into the groove on the top surface of the base, and fix the support frame on the top surface of the base with fastening bolts. Secondly, insert the fixed end of the transition section positioning block into the transition section positioning groove, and fix the transition section positioning block on the side of the support frame with fastening bolts. Then, insert the first fixed boss of the first group of blade positioning blocks and the second fixed boss of the second group of blade positioning blocks into the first group of blade positioning grooves and the second group of blade positioning grooves respectively, and fix the first group of blade positioning blocks and the second group of blade positioning blocks on the side of the support frame with fastening bolts respectively. Finally, place the third fixed boss of the third group of blade positioning blocks on the top surface of the support frame, and fix the third group of blade positioning blocks on the top surface of the support frame with fastening bolts. Step 2: Prepare the components for assembling the wax mold module, including the mold assembly turntable, the module chassis, the crystal selector, the transition section, the first group of blades, the second group of blades, the third group of blades, and the runner. The first group of blades, the second group of blades, and the third group of blades each include three blades. Place the module chassis on the mold assembly turntable, and make the central axis of the module chassis coincide with the central axis of the mold assembly turntable. Step 3: Align the mold assembly turntable positioning surface of the positioning device and the module chassis positioning surface with the side surface of the mold assembly turntable and the side surface of the module chassis respectively to determine the position of the positioning device relative to the module chassis. Step 4: Place the crystal selector on the module chassis, and make the side surface of the crystal selector coincide with the crystal selector positioning surface of the positioning device to determine the installation position of the crystal selector on the module chassis, and then fixedly connect the crystal selector to the module chassis. Step 5: Align the bottom of the transition section with the top of the crystal selector, and make the side surface of the transition section fit with the transition section positioning surface of the positioning device to determine the installation position of the transition section on the top of the crystal selector, and then fixedly connect the bottom of the transition section to the top of the crystal selector. Step 6: Align the bottoms of the three blades in the first group of blades with the top of the transition section respectively, and make the side surface of the back edge plate of the blade fit with the back edge plate positioning surface of the first group of blades of the positioning device, and the side surface of the front edge end plate fit with the front edge end plate positioning surface of the first group of blades of the positioning device. The three blades respectively fit with their corresponding first tooth-shaped structures to determine the installation positions of the three blades in the first group of blades on the top of the transition section, and then fixedly connect the bottoms of the three blades in the first group of blades to the top of the transition section respectively. Step 7: Align the bottoms of the three blades in the second group of blades with the tops of the three blades in the first group of blades respectively, and make the side surface of the back edge plate of the blade fit with the back edge plate positioning surface of the second group of blades of the positioning device, and the side surface of the front edge end plate fit with the front edge end plate positioning surface of the second group of blades of the positioning device. The three blades respectively fit with their corresponding second tooth-shaped structures to determine the installation positions of the three blades in the second group of blades on the tops of the three blades in the first group of blades, and then fixedly connect the bottoms of the three blades in the second group of blades to the tops of the three blades in the first group of blades respectively. Step Eight: Align the bottoms of the three blades in the third group of blades with the tops of the three blades in the second group of blades respectively, and make the side surface of the trailing edge side plate of the blade fit with the positioning surface of the trailing edge side plate of the third group of blades of the positioning device, and the side surface of the leading edge end plate fit with the positioning surface of the leading edge end plate of the third group of blades of the positioning device. The three blades respectively fit with their corresponding third tooth-shaped structures to determine the installation positions of the three blades in the third group of blades on the tops of the three blades in the second group of blades. Then, fixedly connect the bottoms of the three blades in the third group of blades with the tops of the three blades in the second group of blades respectively; Step Nine: Fix the bottom of the runner to the tops of the three blades in the third group of blades, thus completing the combination of the wax pattern module. In this wax pattern module, it can be ensured that the blades have good perpendicularity.

Images