Turbine blade wax pattern high-precision welding positioning tool

Abstract

The invention relates to the technical field of turbine wax pattern welding, in particular to a turbine blade wax pattern high-precision welding positioning tool. Comprising a tool table and further comprises a positioning base provided with an annular groove, the positioning base is composed of an inner ring and an outer ring which are coaxially arranged, the inner ring is provided with a plurality of vertical clamping grooves in the circumferential direction and used for being connected with a protruding positioning part on the inner side of a blade wax pattern in a clamped mode, the jacking annular plate is embedded in the bottom of the annular groove, and the inner pressing plates are evenly distributed in the circumferential direction of the outer ring. Each vertical clamping groove is correspondingly provided with two inner pressing plates, the lower pressing plates are evenly distributed in the circumferential direction of the inner ring, and each vertical clamping groove is correspondingly provided with one lower pressing plate. According to the blade wax pattern positioning device, accurate positioning of a blade wax pattern is achieved through transverse clamping of the inner ring vertical clamping groove and the inner pressing plate and vertical limiting of the lower pressing plate and the jacking ring plate, a wax pattern set is automatically ejected out through the jacking ring plate after welding, and lossless demolding is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of turbine wax pattern welding technology, specifically to a high-precision welding positioning fixture for turbine blade wax patterns. Background Technology

[0002] In the investment casting process of aero-engine turbine components, a complete turbine ring typically consists of dozens of blades. To facilitate molding and control precision, in actual production, several turbine blade wax patterns are often assembled into a multi-blade wax pattern group through wax welding before subsequent shell fabrication and casting. Currently, this welding process generally relies on manual operation by workers. Operators must manually align adjacent blade wax patterns based on experience and perform localized welding. This process is highly prone to defects such as uneven blade spacing, end face misalignment, and angular deviation, directly affecting the quality of the final casting.

[0003] A currently published Chinese patent authorization announcement number CN116493857B discloses an auxiliary welding fixture for turbine blade wax patterns. It includes a support mechanism with multiple support stations distributed along a circular trajectory, each supporting a blade wax pattern. A positioning mechanism uses multiple positioning points to position the blade wax pattern at the positioning station into a predetermined posture. The support mechanism is slidably mounted on a support surface, and sliding the support mechanism allows any one of the support stations to coincide with a positioning station. After being positioned into the predetermined posture, the blade wax pattern is initially fixed on the support station. The fixture also includes a lifting mechanism. The positioning mechanism is located at the lifting end of the lifting mechanism. The lifting mechanism can drive the positioning mechanism upwards to position the blade wax pattern at the positioning station, and can also drive the positioning mechanism downwards to an avoidance position to prevent obstructing the movement of the blades on the support mechanism when it is moved.

[0004] According to the aforementioned patent, the patent uses a sliding support mechanism to sequentially align each support station with the positioning station, and a lifting positioning mechanism to precisely position the blade wax pattern posture, and then spot welds it in place, achieving high-precision assisted welding of the multi-stage turbine blade wax pattern. However, the aforementioned patent only preliminarily fixes the blades through spot welding, lacking precise lateral and vertical positioning of the blades. This makes it impossible to ensure that the upper surfaces of the multi-stage blades are flush and the joint gap is uniform, which can easily lead to welding misalignment due to insufficient positioning.

[0005] Therefore, there is a need for a high-precision welding positioning fixture for turbine blade wax patterns that can simultaneously achieve precise lateral and vertical positioning of the blades, ensuring that multi-stage blades achieve high-precision positioning with flush end faces and consistent orientation before welding. Summary of the Invention

[0006] To address the problems existing in the prior art, a high-precision welding and positioning fixture for turbine blade wax patterns is provided. The fixture achieves precise positioning of the blade wax pattern through a vertical groove in the inner ring, a horizontal clamping of the inner pressure plate, and upper and lower limits of the lower pressure plate and the lifting ring plate. After welding, the wax pattern assembly is automatically ejected by the lifting ring plate, ensuring non-destructive demolding.

[0007] To address the problems of existing technologies, this invention provides a high-precision welding positioning fixture for turbine blade wax patterns, including a fixture table and a positioning base. The positioning base is fixedly mounted on the fixture table and has an upward-facing annular groove for circumferentially placing several blade wax patterns. The positioning base consists of an inner ring and an outer ring arranged coaxially. The inner ring has several vertical slots along its circumference for engaging the protruding positioning parts on the inner side of the blade wax patterns. A lifting ring plate is embedded at the bottom of the annular groove. A lifting driver, which is pulsatorically connected to the lifting ring plate, is provided on the fixture table to push the entire set of blade wax patterns upwards after welding. Several internal pressure... Plates are evenly distributed along the circumference of the outer ring. Each vertical slot is provided with two inner pressure plates, with a gap between them for inserting the blade wax pattern. Each pair of inner pressure plates on the outer ring is provided with a manual adjustment component that is connected to it for driving the inner pressure plates to press against the outer arc surface of the blade wax pattern from both sides, forming a lateral limit with the inner ring. Several lower pressure plates are evenly distributed along the circumference of the inner ring. Each vertical slot is provided with a lower pressure plate. A lower pressure driver that is connected to all the lower pressure plates is provided on the tooling table for synchronously pressing down the upper surface of the positioning part of each blade wax pattern, forming a vertical limit with the lifting ring plate.

[0008] Preferably, the inner and outer sides of the lifting ring plate are respectively provided with an inner support part and an outer support part in the shape of a ring. A support area for supporting the blade wax pattern placed in the annular groove is formed between the two support parts. The inner support part is provided with a sliding engagement part that slides with each vertical slot.

[0009] Preferably, each vertical slot is provided with a U-shaped split plate, and all the split plates are spliced ​​together to form the outer ring which is fixedly connected to the inner ring. Two inner pressure plates are slidably provided on each split plate along its length direction, and the manual adjustment component is installed on the split plate.

[0010] Preferably, the upper end of the inner pressure plate is provided with a rubber layer, and the lower end extends vertically downward through the lifting ring plate. The lifting ring plate is provided with clearance grooves along the sliding direction of each inner pressure plate, and the bottom of the split plate is provided with a slide rail structure that slides and engages with the lower ends of the two inner pressure plates.

[0011] Preferably, a push plate is slidably provided at the bottom of the split plate along its length direction, and a guide rod is provided at the outer end of the split plate extending outward along its length direction. The inner end of the push plate is fixedly connected to the lower end of the two inner pressure plates, and the outer end is provided with a guide sleeve slidably sleeved on the guide rod.

[0012] Preferably, the manual adjustment assembly includes a threaded push rod and a first compression spring sleeved on a guide rod. The guide rod has an external thread along its axial direction, and the threaded push rod has an internal hole that threadedly engages with the guide rod. One end of the threaded push rod abuts against a guide sleeve, and the other end has a handle. The first compression spring is located between the guide sleeve and the split plate.

[0013] Preferably, the top of the push plate has an upward protrusion with a step, and the step and the split plate form an axial limit to limit the maximum pushing position of the push plate during the pressing stroke.

[0014] Preferably, the pressure drive includes a lifting bracket and a lifting cylinder mounted on a tooling table. The lifting bracket is located inside the inner ring and is fixedly connected to the output end of the lifting cylinder. The top of the lifting bracket is provided with an annular flange for mounting the pressure plate.

[0015] Preferably, the lower pressure plate is horizontally disposed on the top of the annular flange and can slide radially thereon. A guide shaft extending downward through the annular flange is fixedly disposed on the lower pressure plate. A guide groove for sliding the guide shaft is provided on the annular flange. The lifting bracket is provided with a linkage component for synchronously pushing and pulling all the lower pressure plates to unfold or retract.

[0016] Preferably, a second compression spring is fixedly connected between each of the lower pressure plates and the annular flange. The linkage assembly includes a sleeve and a connecting rod. A guide post is provided at the center of the lifting bracket for the sleeve to slide on. A connecting rod is provided between each lower pressure plate and the sleeve. The two ends of the connecting rod are respectively hinged to the lower pressure plate and the sleeve.

[0017] The advantages of this application compared to the prior art are: 1. This invention achieves precise lateral positioning by placing blade wax patterns within the annular groove of the positioning base, embedding the positioning part of each blade wax pattern into a vertical slot, and clamping it from both sides of the outer arc surface by two inner pressure plates on the corresponding split plate. Subsequently, the downward pressure driver drives all the downward pressure plates to synchronously press down on the upper surface of the positioning part of each blade wax pattern, pressing it against the support area formed by the inner and outer support parts of the lifting ring plate, forcing the upper end surfaces of the entire set of blade wax patterns to be coplanar, forming a high-precision vertical limit.

[0018] After welding is completed, the lower pressure plate and inner pressure plate are removed, the lifting ring plate moves upward as a whole, and its sliding snap-fit ​​part slides smoothly along the inner wall of the vertical slot, completely ejecting the wax pattern assembly that has been welded together, avoiding damage caused by manual prying, and ensuring reliable positioning and smooth demolding.

[0019] 2. This invention features a rubber layer on the upper end of the inner pressure plate, which flexibly conforms to the outer arc surface of the blade wax pattern, preventing scratches or damage during clamping. The lower end of the inner pressure plate passes through the clearance groove of the lifting ring plate and slides into the slide rail structure at the bottom of the split plate, ensuring smooth and interference-free movement. The operator converts the rotation of the handle into axial thrust, which, through the threaded engagement of the threaded push rod and the guide rod, drives the guide sleeve and push plate in tandem, causing the two inner pressure plates to clamp or release synchronously.

[0020] At the same time, the step on the top of the push plate and the split plate form a mechanical stop, limiting the maximum push position. Combined with the elastic reset effect of the first compression spring, it not only prevents overpressure damage to the wax pattern, but also ensures reliable clamping.

[0021] 3. This invention uses a lifting cylinder to drive the lifting bracket to move up and down, causing the annular flange and lower pressure plate to rise and fall synchronously, achieving uniform pressing and releasing of the upper surface of the blade wax pattern positioning part. At the same time, through the sliding of the sleeve along the guide post, and in conjunction with the linkage and the elastic force of the second compression spring, all the lower pressure plates automatically retract radially inward to avoid the blade wax pattern before it is placed, and precisely extend outward to directly above the corresponding positioning part after the blade wax pattern is in place.

[0022] The guide shaft at the bottom of the pressure plate engages with the guide groove on the annular flange to ensure smooth radial sliding and accurate alignment. The entire process achieves automatic avoidance, precise positioning, and synchronous pressing of the pressure plate, ensuring smooth insertion of the blade wax pattern and reliable vertical limiting and coplanar end faces during welding, thereby improving assembly accuracy and operational efficiency. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a high-precision welding and positioning fixture for turbine blade wax patterns from a first perspective.

[0024] Figure 2 This is a three-dimensional structural diagram of a high-precision welding and positioning fixture for turbine blade wax patterns from a second perspective.

[0025] Figure 3 This is an exploded three-dimensional structural diagram of a high-precision welding positioning fixture for turbine blade wax patterns according to the present invention.

[0026] Figure 4 This is a partial three-dimensional structural cross-sectional view of a high-precision welding positioning fixture for turbine blade wax patterns according to the present invention.

[0027] Figure 5 This is a three-dimensional structural diagram of the positioning base of a high-precision welding positioning fixture for turbine blade wax patterns according to the present invention.

[0028] Figure 6 This is a three-dimensional structural diagram of the inner pressure plate and lower pressure plate of a high-precision welding positioning fixture for turbine blade wax patterns according to the present invention, viewed from a first perspective.

[0029] Figure 7 This is a three-dimensional structural diagram of the inner pressure plate and lower pressure plate of a high-precision welding positioning fixture for turbine blade wax patterns according to the present invention, viewed from a second perspective.

[0030] Figure 8 This is a three-dimensional structural cross-sectional view of the inner pressure plate and the lower pressure plate of a high-precision welding positioning fixture for turbine blade wax patterns according to the present invention.

[0031] Figure 9 This is a three-dimensional structural cross-sectional view of the pressure plate and linkage assembly of a high-precision welding positioning fixture for turbine blade wax patterns according to the present invention.

[0032] Figure 10 This is a three-dimensional structural diagram of the blade wax pattern of the present invention.

[0033] The following are the labels in the diagram: 1. Blade wax pattern; 11. Positioning part; 2. Tooling table; 21. Lifting actuator; 211. Lifting ring plate; 212. Lifting cylinder; 22. Manual adjustment assembly; 221. Push plate; 2211. Guide sleeve; 2212. Step; 222. Guide rod; 223. Threaded push rod; 2231. Handle; 224. First compression spring; 23. Downward actuator; 231. Lifting bracket; 2311. Annular flange; 2312. Guide groove; 232. Lifting cylinder; 3. Positioning base; 3 1. Inner ring; 311. Vertical slot; 32. Outer ring; 321. Split plate; 322. Slide rail structure; 4. Lifting ring plate; 41. Inner support part; 411. Snap-fit ​​part; 42. Outer support part; 421. Connecting plate; 43. Clearance groove; 5. Inner pressure plate; 51. Rubber layer; 6. Lower pressure plate; 61. Guide shaft; 62. Linkage assembly; 621. Second compression spring; 622. Sleeve; 623. Connecting rod; 63. Guide post; 631. Fixed electromagnet; 632. Movable electromagnet; 633. Anti-detachment ring. Detailed Implementation

[0034] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0035] See Figures 1 to 8As shown, a high-precision welding positioning fixture for turbine blade wax patterns includes a fixture table 2 and a positioning base 3, which is fixedly mounted on the fixture table 2. The positioning base 3 has an upward-facing annular groove for circumferentially placing several blade wax patterns 1. The positioning base 3 is composed of an inner ring 31 and an outer ring 32 arranged coaxially. The inner ring 31 has several vertical slots 311 along its circumference for engaging the protruding positioning portions 11 on the inner side of the blade wax patterns 1. A lifting ring plate 4 is embedded at the bottom of the annular groove. A lifting driver 21, which is pulsatorically connected to the lifting ring plate 4, is provided on the fixture table 2 to push the entire set of blade wax patterns 1 upwards after welding. Several inner pressure plates 5 are evenly distributed around the outer ring 32. Each vertical slot 311 is provided with two inner pressure plates 5, with a gap between them for inserting the blade wax pattern 1. Each pair of inner pressure plates 5 is provided with a manual adjustment component 22 that is driven to drive the inner pressure plates 5 to press against the outer arc surface of the blade wax pattern 1 from both sides, forming a lateral limit with the inner ring 31. Several lower pressure plates 6 are evenly distributed around the inner ring 31. Each vertical slot 311 is provided with a lower pressure plate 6. The tooling table 2 is provided with a lower pressure driver 23 that is driven to all the lower pressure plates 6, which is used to synchronously press down the upper surface of the positioning part 11 of each blade wax pattern 1, forming a vertical limit with the lifting ring plate 4.

[0036] The lifting driver 21 includes a lifting ring plate 211 and a lifting cylinder 212. The lifting ring plate 211 is coaxially arranged below the positioning base 3. The bottom of the lifting ring plate 211 is provided with several connecting plates 421 that pass vertically through the positioning base 3 and slide with it. Each connecting plate 421 is fixedly connected to the lifting ring plate 211. A lifting cylinder 212 is installed around the tooling table 2. The lifting ring plate 211 is fixedly connected to the output shaft of each lifting cylinder 212.

[0037] When welding the multi-stage turbine blade wax pattern 1, the operator first places each individual blade wax pattern 1 into the annular groove of the positioning base 3 in the circumferential direction. The positioning part 11 protruding on the inner side of each blade wax pattern 1 is aligned with the corresponding vertical groove 311 on the inner ring 31 and initially embedded therein. Subsequently, through the manual adjustment components 22 provided on the outer ring 32 for each pair of inner pressure plates 5, the operator manually adjusts the inner pressure plates 5 to slide radially inward, so that the two inner pressure plates 5 simultaneously abut against both sides of the outer arc surface of the blade wax pattern 1, thereby forming a reliable lateral limit with the vertical groove 311 of the inner ring 31, effectively eliminating the degree of freedom of the blade wax pattern 1 in the circumferential direction, and ensuring that the spacing and angle between adjacent blade wax patterns 1 are uniform.

[0038] After all the blade wax patterns 1 have been horizontally positioned, the downward pressure driver 23 is activated, which synchronously drives all the downward pressure plates 6 to move vertically downward. Each downward pressure plate 6 is aligned with the upper surface of the positioning part 11 of its corresponding blade wax pattern 1, and a uniform and controllable downward pressure is applied, so that the upper surface of all the blade wax patterns 1 is forced to be flattened to the same horizontal plane, forming a precise vertical limit.

[0039] At this point, the entire blade wax pattern 1 is constrained with high precision in both the horizontal and vertical directions, providing a stable assembly reference for subsequent spot welding or full welding, and effectively avoiding welding defects caused by misalignment, warping or uneven gaps.

[0040] After all welding processes are completed, the downward pressure drive 23 is activated to control all downward pressure plates 6 to move away from the positioning base 3. Simultaneously, the operator manually operates the manual adjustment components 22 one by one to release all blade wax patterns 1 from constraint. Then, the operator activates the lifting drive 21. The lifting ring plate 211, through several connecting plates 421, transmits the lifting force to the upper lifting ring plate 4. The lifting ring plate 4 then moves upward as a whole, smoothly ejecting the entire set of blade wax patterns 1, which has been welded together, from the annular groove, separating it from the limiting area of ​​the inner ring 31 and outer ring 32, achieving non-destructive and efficient demolding. This improves the welding accuracy and production efficiency of the multi-stage turbine blade wax pattern 1 set.

[0041] See Figures 4-8 and Figure 10 As shown, the inner and outer sides of the lifting ring plate 4 are respectively provided with an inner support part 41 and an outer support part 42 in the shape of a ring. A support area for supporting the blade wax pattern 1 placed in the annular groove is formed between the two support parts. The inner support part 41 is provided with a sliding engagement part 411 that slides with each vertical slot 311.

[0042] When several blade wax patterns 1 are sequentially placed into the annular groove of the positioning base 3, their bottoms naturally fall into the supporting area, and the inner support part 41 and the outer support part 42 jointly provide bottom support to prevent the blade wax patterns 1 from deforming or tilting due to local suspension.

[0043] During the welding process, the lower pressure plate 6 presses the blade wax pattern 1 firmly onto the inner support part 41 and the outer support part 42, forming a vertical guiding constraint. When the lifting action is initiated after welding, the lifting ring plate 4 moves upward as a whole, and the sliding snap part 411 slides smoothly along the inner wall of the vertical snap groove 311, which not only achieves reliable support for the entire set of blade wax patterns 1, but also ensures the precision and efficiency of the subsequent demolding process.

[0044] See Figures 4 to 8As shown, each vertical slot 311 is provided with a U-shaped split plate 321. All the split plates 321 are spliced ​​together to form the outer ring 32 which is fixedly connected to the inner ring 31. Two inner pressure plates 5 are slidably provided on each split plate 321 along its length direction. The manual adjustment component 22 is installed on the split plate 321.

[0045] The operator uses the manual adjustment components 22 installed on each split plate 321 to drive the two inner pressure plates 5, which are slidably disposed along the length of the split plate 321, to move inward synchronously, applying clamping force from both sides of the outer arc surface of the blade wax pattern 1. Each blade wax pattern 1 is independently and precisely laterally limited within its corresponding split plate 321 area, ensuring that the entire set of blades maintains a consistent relative position before welding.

[0046] See Figures 4 to 8 As shown, the upper end of the inner pressure plate 5 is provided with a rubber layer 51, and the lower end extends vertically downward through the lifting ring plate 4. The lifting ring plate 4 is provided with clearance grooves 43 along the sliding direction of each inner pressure plate 5. The bottom of the split plate 321 is provided with a slide rail structure 322 that slides and cooperates with the lower ends of the two inner pressure plates 5.

[0047] During the operation of the fixture, the upper end of the inner pressure plate 5 is equipped with a rubber layer 51, which allows it to flexibly conform to the outer arc surface of the wax pattern 1 when clamping it, preventing scratches or damage to the wax pattern surface. The lower end of the inner pressure plate 5 passes through the lifting ring plate 4 and extends downward in the vertical direction. To ensure that the inner pressure plate 5 can slide smoothly without interference during clamping and releasing, the lifting ring plate 4 has a clearance groove 43 at its corresponding position along the sliding direction of the inner pressure plate 5, allowing the inner pressure plate 5 to pass freely when moving radially.

[0048] Meanwhile, the slide rail structure 322 at the bottom of the split plate 321 allows the lower end of the inner pressure plate 5 to be embedded in and slide with it, thus enabling it to slide smoothly along the length of the split plate 321 under the drive of the manual adjustment component 22, achieving reliable clamping and release of the blade wax pattern 1. During the entire lifting and demolding process, the clearance groove 43 also allows the lifting ring plate 4 to move up and down independently without affecting the position of the inner pressure plate 5.

[0049] See Figures 6 to 8 As shown, a push plate 221 is slidably provided at the bottom of the split plate 321 along its length direction, and a guide rod 222 extends outward from the outer end of the split plate 321 along its length direction. The inner end of the push plate 221 is fixedly connected to the lower end of the two inner pressure plates 5, and the outer end is provided with a guide sleeve 2211 slidably sleeved on the guide rod 222.

[0050] When the manually adjusted component 22 is activated, the push plate 221 is pushed to slide inward or outward along the split plate 321, thereby synchronously driving the two inner pressure plates 5 to move, achieving clamping or releasing of the blade wax pattern 1. During the sliding process of the push plate 221, the guide sleeve 2211 slides smoothly along the guide rod 222, providing guidance and support for the push plate 221, ensuring its movement trajectory is stable and does not deviate, thereby making the two inner pressure plates 5 evenly stressed and moving synchronously, improving the accuracy and reliability of lateral limiting.

[0051] See Figures 6 to 8 As shown, the manual adjustment assembly 22 includes a threaded push rod 223 and a first compression spring 224 sleeved on the guide rod 222. The guide rod 222 has an external thread along its axial direction. The threaded push rod 223 has an internal hole that is threadedly engaged with the guide rod 222. One end of the threaded push rod 223 abuts against the guide sleeve 2211, and the other end has a handle 2231. The first compression spring 224 is located between the guide sleeve 2211 and the split plate 321.

[0052] When the operator rotates the handle 2231, the rotation will be converted into axial pushing or retracting motion because the threaded push rod 223 and the guide rod 222 are threadedly engaged.

[0053] When the threaded push rod 223 moves forward, its front end presses against the guide sleeve 2211, pushing the push plate 221 to slide inward along the split plate 321, thereby causing the two inner pressure plates 5 to simultaneously clamp the blade wax pattern 1. At this time, the first compression spring 224 located between the guide sleeve 2211 and the split plate 321 is compressed, providing a reverse elastic force.

[0054] When the handle 2231 is rotated in the opposite direction, the threaded push rod 223 retracts. Under the elastic force of the first compression spring 224, the guide sleeve 2211 is pushed back, which drives the push plate 221 and the inner pressure plate 5 to reset outward, releasing the blade wax pattern 1 and completing one clamping or loosening action cycle.

[0055] See Figures 6 to 8 As shown, the top of the push plate 221 has an upward protrusion of a step 2212, which forms an axial limit with the split plate 321 to limit the maximum pushing position of the push plate 221 during the pressing stroke.

[0056] As the pusher plate 221 slides inward to press against the blade, the protruding step 2212 at its top gradually approaches the split plate 321. When the pusher plate 221 reaches the predetermined clamping position, the step 2212 contacts and is blocked by the split plate 321, preventing the pusher plate 221 from continuing to advance. This automatically limits its maximum advance position during the pressing stroke, preventing the inner pressure plate 5 from applying excessive clamping force and damaging the blade wax pattern 1.

[0057] See Figures 2 to 4 and Figure 9As shown, the pressure drive 23 includes a lifting bracket 231 and a lifting cylinder 232 mounted on the tooling table 2. The lifting bracket 231 is located inside the inner ring 31 and is fixedly connected to the output end of the lifting cylinder 232. The top of the lifting bracket 231 is provided with an annular flange 2311 for mounting the pressure plate 6.

[0058] Before welding, the lifting cylinder 232 is activated and extends upward, causing the lifting bracket 231 connected to it to rise synchronously. The lifting bracket 231 is located inside the inner ring 31. During the rising process, the annular flange 2311 at its top is raised, thereby pushing the lower pressure plate 6 installed on it to move upward to the preset position.

[0059] When pressure needs to be applied, the lifting cylinder 232 reverses its action, driving the lifting bracket 231 to descend. The annular flange 2311 drives all the lowering plates 6 to move downward synchronously, applying uniform pressure to the upper surface of the positioning part 11 of each blade wax pattern 1, thereby achieving vertical positioning.

[0060] See Figures 2 to 4 and Figure 9 As shown, the lower pressure plate 6 is horizontally disposed on the top of the annular flange 2311 and can slide radially thereon. A guide shaft 61 is fixedly disposed on the lower pressure plate 6, extending downward through the annular flange 2311. A guide groove 2312 for sliding the guide shaft 61 is provided on the annular flange 2311. A linkage component 62 is provided on the lifting bracket 231 for synchronously pushing and pulling all the lower pressure plates 6 to unfold or retract.

[0061] When the linkage component 62 is activated, all the lower pressure plates 6 are pushed or pulled to slide radially synchronously along the top of the annular flange 2311.

[0062] When the lower pressure plate 6 slides outward, the guide shaft 61 fixed at its bottom moves in the guide groove 2312 on the annular flange 2311, ensuring smooth movement and accurate direction, so that each lower pressure plate 6 unfolds above the positioning part 11 of its respective blade wax pattern 1.

[0063] When the linkage component 62 moves in the opposite direction, the lower pressure plate 6 retracts radially inward, disengaging from the working position, providing clearance space for the placement or removal of the blade wax pattern 1.

[0064] See Figures 2 to 4 and Figure 9 As shown, each of the lower pressure plates 6 is fixedly connected to a second compression spring 621 between the annular flange 2311 and the linkage assembly 62 includes a sleeve 622 and a connecting rod 623. The center of the lifting bracket 231 is provided with a guide post 63 for the sleeve 622 to slide on. Each of the lower pressure plates 6 and the sleeve 622 is provided with a connecting rod 623. The two ends of the connecting rod 623 are respectively hinged to the lower pressure plate 6 and the sleeve 622.

[0065] The guide post 63 is provided with an electromagnetic drive structure that cooperates with the sleeve 622. The electromagnetic drive structure includes a fixed electromagnet 631 and a movable electromagnet 632. The fixed electromagnet 631 is fixedly connected to the guide post 63, and the movable electromagnet 632 is fixedly connected to the sleeve 622.

[0066] The upper end of the guide post 63 is provided with an anti-detachment ring 633. When the two electromagnets are energized and repel each other, the sleeve 622 slides upward along the guide post 63 and drives each pressure plate 6 to expand radially outward through the connecting rod 623, so that it is precisely aligned with the positioning part 11 above the corresponding blade wax pattern 1 and enters the positioning state to be pressed down.

[0067] The driving method for moving the electromagnetic drive sleeve 622 is one embodiment, but it is not limited to this.

[0068] Before the blade wax pattern 1 is placed, the sleeve 622 slides down along the guide post 63, and through each connecting rod 623, and in conjunction with the second compression spring 621, drives all the lower pressure plates 6 to retract radially inward in sync, so that the lower pressure plates 6 avoid the installation area of ​​the blade wax pattern 1, making it easier for the operator to smoothly place the blade wax pattern 1.

[0069] After all the blade wax patterns 1 are in place, the sleeve 622 slides upward along the guide post 63, and the connecting rod 623 pushes each lower pressure plate 6 to expand radially outward, precisely aligning it above the positioning part 11 of its corresponding blade wax pattern 1, and enters the waiting-to-press state. Then the lifting bracket 231 descends as a whole, and the lower pressure plate 6 presses the blade wax pattern 1, completing the vertical limit.

[0070] This invention achieves precise lateral positioning by placing the blade wax pattern 1 into the annular groove of the positioning base 3, embedding its inner positioning part 11 into the vertical slot 311 of the inner ring 31, and simultaneously clamping it from both sides of the outer arc surface by two inner pressure plates 5 on the corresponding split plate 321. A rubber layer 51 is provided at the upper end of the inner pressure plate 5 to flexibly conform to the wax pattern surface and prevent damage. During the pressing process of the inner pressure plate 5, the operator rotates the handle 2231, converting the rotational motion into axial thrust through the threaded engagement of the threaded push rod 223 and the guide rod 222, pushing the guide sleeve 2211 and the push plate 221 in linkage, so that the inner pressure plate 5 can be reliably clamped or released. The step 2212 at the top of the push plate 221 forms a mechanical stop with the split plate 321, which, combined with the elastic reset of the first compression spring 224, effectively limits the maximum clamping stroke and avoids overpressure.

[0071] At the same time, the downward pressure driver 23 drives the lifting bracket 231 and the annular flange 2311 to move up and down through the lifting cylinder 232, so that the downward pressure plate 6 simultaneously presses or releases the upper surface of the positioning part 11 of the blade wax pattern 1. Under the action of the linkage component 62, the downward pressure plate 6 automatically retracts radially inward to avoid material before loading, and then precisely extends outward to align with each positioning part 11 after being in position.

[0072] After welding, the inner pressure plate 5 and the lower pressure plate 6 are reset, the lifting ring plate 4 rises as a whole, and the sliding snap-fit ​​part 411 slides smoothly along the inner wall of the vertical snap-fit ​​groove 311, completely ejecting the welded wax pattern assembly and achieving non-destructive demolding. This ensures accurate clamping and reliable positioning, improving the finished product quality of the multi-stage turbine blade wax pattern 1 welding.

[0073] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A high-precision welding positioning tool for turbine blade wax patterns, comprising a tool table, characterized in that, Also include: Positioning base, fixedly arranged on the tooling table, having an annular groove with an upward opening for placing a plurality of blade wax patterns in a ring, the positioning base is composed of an inner ring and an outer ring arranged coaxially, the inner ring is provided with a plurality of vertical clamping grooves along the circumference, for clamping the inner side of the blade wax pattern protruding positioning part; The jacking ring plate is embedded in the bottom of the annular groove, and the tooling table is provided with a jacking drive connected with the jacking ring plate for jacking the whole set of blade wax patterns upward after welding is completed; A plurality of inner pressure plates are uniformly distributed along the circumference of the outer ring, two inner pressure plates are provided for each vertical clamping groove, and a gap is left between the two inner pressure plates for placing the blade wax pattern, the outer ring is provided with a manual adjustment assembly corresponding to each pair of inner pressure plates and connected with the inner pressure plates, for driving the inner pressure plates to tightly press the outer arc surface of the blade wax pattern from both sides, and cooperating with the inner ring to form horizontal limiting; A plurality of lower pressure plates are uniformly distributed along the circumference of the inner ring, one lower pressure plate is provided for each vertical clamping groove, and a lower pressure drive connected with all the lower pressure plates is arranged on the tooling table for synchronously pressing the upper surface of the positioning part of each blade wax pattern, and cooperating with the jacking ring plate to form vertical limiting.

2. The high-precision welding positioning tool for turbine blade wax pattern according to claim 1, characterized in that, The inner side and the outer side of the jacking ring plate are respectively provided with annular inner support part and outer support part, and the two support parts form a supporting area for supporting the blade wax pattern placed in the annular groove.

3. The high-precision welding positioning tool for a turbine blade wax pattern according to claim 2, characterized in that, Each vertical clamping groove is provided with a U-shaped split plate, and all the split plates are connected to form the outer ring fixedly connected with the inner ring, two inner pressure plates are slidably arranged on each split plate along the length direction of the split plate, and the manual adjustment assembly is installed on the split plate.

4. The high-precision welding positioning tool for a turbine blade wax pattern according to claim 3, characterized in that, The upper end of the inner pressure plate is provided with a rubber layer, and the lower end extends vertically downward through the jacking ring plate, the jacking ring plate is provided with a avoiding slot along the sliding direction of each inner pressure plate, and the bottom of the split plate is provided with a slide rail structure slidably connected with the lower end of the two inner pressure plates.

5. The high-precision welding positioning tool for turbine blade wax pattern according to claim 4, characterized in that, The bottom of the split plate is provided with a push plate slidably arranged along the length direction of the split plate, and the outer end of the split plate is provided with a guide rod extending outward along the length direction of the split plate, the inner end of the push plate is fixedly connected with the lower end of the two inner pressure plates, and the outer end is provided with a guide sleeve slidably arranged on the guide rod.

6. The high-precision welding positioning tool for a turbine blade wax pattern according to claim 5, characterized in that, The manual adjustment assembly includes a threaded push rod and a first compression spring sleeved on the guide rod, the guide rod is provided with an external thread along the axial direction, the threaded push rod is provided with an inner hole matched with the thread of the guide rod, one end of the threaded push rod abuts against the guide sleeve, and the other end is provided with a handle, and the first compression spring is located between the guide sleeve and the split plate.

7. The high-precision welding positioning tool for turbine blade wax pattern according to claim 6, characterized in that, The top of the push plate is protruded upward to form a step, and the step forms axial limiting between the split plate, for limiting the maximum advancing position of the push plate in the pressing stroke.

8. The high-precision welding positioning tool for turbine blade wax pattern according to claim 1, characterized in that, The lower pressure drive includes a lifting support and a lifting cylinder installed on the tooling table, the lifting support is arranged on the inner side of the inner ring and fixedly connected with the output end of the lifting cylinder, and the top of the lifting support is provided with an annular flange for installing the lower pressure plate.

9. The high-precision welding positioning tool for a turbine blade wax pattern according to claim 8, characterized in that, The lower pressing plates are horizontally arranged on the top of the annular flange and can slide along the radial direction of the annular flange, the lower pressing plates are fixedly provided with guide shafts vertically penetrating the annular flange and extending downward, the annular flange is provided with guide grooves for the sliding of the guide shafts, and the lifting support is provided with a linkage assembly for synchronously pushing and pulling all the lower pressing plates to be unfolded or contracted.

10. The high-precision welding positioning tool for a turbine blade wax pattern according to claim 9, characterized in that, Second compression springs are fixedly connected between each of the lower pressing plates and the annular flange, the linkage assembly comprises a sleeve and a connecting rod, the lifting support is provided with a guide column for slidingly sleeving the sleeve, and one of the connecting rods is arranged between each of the lower pressing plates and the sleeve, and the two ends of the connecting rod are hingedly connected with the lower pressing plate and the sleeve respectively.

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