Steam turbine blade shockproof forming device and process

Abstract

The present application relates to the technical field of slip casting, in particular to a steam turbine blade anti-vibration forming device and process, which comprises a forming mold composed of a first mold half and a second mold half. The opposite surfaces of the first mold half and the second mold half are provided with oblique joint surfaces, and the joint surfaces form mutually interlocking convex particles and concave hole structures, so that the two mold halves form a unique pairing positioning relationship when the mold is closed. The four corners of the forming mold are provided with mutually cooperating convex buckles and buckling elements, and multi-point locking is achieved through the rotational interlocking between the buckle pins and the elbow buckles, thereby reliably fixing the mold halves during the forming process. The present application cooperates the anti-misplacement joint surface structure and the interlocking locking structure to effectively suppress the loosening of the mold halves caused by vibration and impact during the forming process, improve the stability, precision and forming quality of the steam turbine blade forming, and is suitable for popularization and application under high vibration working conditions.

Description

Technical Field

[0001] This invention relates to the field of grouting molding technology, specifically to a shock-resistant molding device and process for steam turbine blades. Background Technology

[0002] During the forming and manufacturing process of steam turbine blades, a stable mold cavity structure is typically formed by upper and lower mold segments or mating molds to ensure that the blade's external dimensions, contour accuracy, and surface quality meet design requirements. In existing steam turbine blade forming devices, the forming mold generally consists of a first mold segment and a second mold segment that mat with each other. The two mold segments are positioned by fitting surfaces when the mold is closed, and are fixed on the outside by fasteners or locking mechanisms, thereby completing the forming operation.

[0003] In existing technologies, the joint surface between the first and second mold segments often adopts a planar or simple inclined surface structure. Its surface is usually smooth or a simply machined flat surface, and positioning and fixing are achieved solely through surface contact or the clamping force of fasteners. This type of structure can meet basic forming requirements under static conditions, but in actual production processes, turbine blade forming is often accompanied by large mechanical vibrations, impact loads, or cyclic load changes. Especially under high-pressure forming, rapid mold closing, or continuous production conditions, slight relative slippage or misalignment can easily occur between the mold segments.

[0004] To prevent mold segments from loosening, existing technologies typically incorporate locking structures such as fasteners, clips, or bolts around the mold, increasing the number of fastening points or raising the preload to enhance the connection stability between mold segments. However, this type of locking method relies primarily on external fastening force for constraint, and the mold segment mating surfaces themselves lack effective self-positioning and anti-slip capabilities. If uneven local stress occurs under vibration or fastener loosening, relative displacement of the mold segments may still occur, thus affecting the mold cavity accuracy.

[0005] Furthermore, in existing molding devices, the first and second mold segments typically exhibit high structural symmetry or versatility, lacking a unique pairing characteristic during mold closing. This poses a risk of mis-assembly, incorrect assembly, or deviation in assembly direction. Once mold segment misalignment occurs, it can not only lead to deviations in the size of the molding blades but also cause localized stress concentration on the mold, increased wear, and even molding failure or equipment damage.

[0006] Therefore, existing turbine blade forming devices still have shortcomings in terms of mold segment joining structure and anti-vibration locking method. There is an urgent need for a turbine blade anti-vibration forming device that can achieve unique positioning during the mold segment joining process, effectively suppress relative misalignment caused by vibration, and maintain long-term stable connection in the locked state, so as to improve the stability of the forming process and the forming quality. Summary of the Invention

[0007] This invention aims to address the problems in existing turbine blade forming devices, such as insufficient positioning capability of the mold lobe joint surface, susceptibility to relative misalignment under vibration or impact loads, and limited stability due to reliance on external fastening for the locking structure. This invention provides a turbine blade anti-vibration forming device and its forming process. This technical solution introduces oblique interlocking joint surfaces with unique pairing characteristics into the mold lobe joint structure, combined with a distributed interlocking locking mechanism, to achieve reliable positioning and anti-vibration locking of the mold lobe during the forming process, thereby improving forming stability and forming quality.

[0008] The overall technical solution of the present invention is as follows: a molding die formed by combining a first mold piece and a second mold piece is provided with a joint surface and a mold cavity with an oblique structure on the opposite surface of the two mold pieces, so that the mold pieces form a stable mold cavity structure during the assembly process; mutually cooperating convex fasteners and locking fasteners are provided at the four corners of the molding die, and the mold pieces are locked at multiple points through the interlocking cooperation between the fastener pin and the buckle, so that a shockproof molding structure with self-positioning and vibration resistance is formed after the mold pieces are joined.

[0009] In a preferred embodiment, the molding die of the present invention includes a first mold lobe and a second mold lobe. The opposing surfaces of the first mold lobe and the second mold lobe are provided with a mating surface and a mold cavity. The mating surface is inclined and is used to guide the relative positioning of the two mold lobes during the mating process. Specifically, this structure can provide guidance and fitting reference when the mold lobes are closed, which is beneficial to improving the accuracy of mold lobe mating.

[0010] In a preferred embodiment, the mating surfaces of the first and second module lobes are further configured as non-smooth surfaces, with interlocking protrusions and recesses on the mating surfaces, so that the first and second module lobes form a unique pairing relationship in the radial, circumferential, and axial directions. Specifically, this structure can achieve a self-positioning effect that prevents misalignment and reverse installation when the module lobes are mated, and restricts the relative slippage of the module lobes under vibration conditions from the structure itself.

[0011] In a preferred embodiment, the first and second mold segments are further configured such that positioning grooves are provided at the four corners for the installation and positioning of the protruding fastener and the locking element. Specifically, the positioning grooves limit the installation of the locking structure, which helps to ensure the relative positional accuracy of the protruding fastener and the locking element during the mold segment closing process and improves the locking reliability.

[0012] In a preferred embodiment, the protruding fastener includes a buckle seat, a slide bar, and a buckle pin fixed to the surface of the slide bar. The buckle seat is used to guide the slide bar to slide linearly, and the inner side of the buckle seat is provided with an elastic element connected to the slide bar. Specifically, the elastic element can provide buffering and reset during the locking process, so that the buckle pin can stably enter the locking position.

[0013] In a preferred embodiment, the locking element is further configured such that it includes a slotted seat and a shaft, a buckle, a lever, and a knob rotatably mounted inside the slotted seat. The buckle is fixedly sleeved on the surface of the shaft, and the shaft ends of the shaft, the lever, and the knob are all provided with torsion springs. Specifically, the torsion springs restore the buckle to a stable limit state after locking, thus preventing loosening caused by vibration.

[0014] In a preferred embodiment, the buckle is further configured to be planar spiral-shaped, with several buckle grooves on its inner side that abut against the surface of the buckle pin. Specifically, this structure enables the buckle pin to form a multi-level limiting fit after entering the buckle, thereby improving the locking structure's ability to constrain axial and radial displacement.

[0015] In a preferred embodiment, the groove seat surface is further configured such that a slot is provided for the sliding rod and the buckle to pass through. When the convex fastener and the locking member are in the locked state, the end of the sliding rod passes into the inner side of the groove seat and the buckle pin abuts against the surface of the buckle groove. Specifically, a reliable interlocking between the convex fastener and the locking member is achieved through a through-type engagement.

[0016] In a preferred embodiment, the buckle is further configured such that it is axially parallel to the lever and located in the same plane, with one end of the lever abutting against the buckle surface to prevent the buckle from deflecting. Specifically, this structure can prevent the buckle from rotating unexpectedly under external force, thereby maintaining the stability of the locked state.

[0017] In a preferred embodiment, the first and second mold lobes are further configured to form a turbine blade mold cavity structure by combining the mold cavity, and the inner wall of the mold cavity is smooth and glossy. Specifically, this structure helps to ensure the forming accuracy and surface quality of the turbine blade.

[0018] In a preferred embodiment, the present invention also provides a turbine blade anti-vibration forming process, comprising: using the oblique mating surfaces of the first and second mold segments arranged opposite each other to make the protrusions and concave holes on the mating surfaces uniquely paired and positioned; then manually turning the lever to rotate the buckle and lock it in place with the locking pin; and under the multi-point interlocking action of the protruding fastener and the locking element, suppressing the relative loosening of the mold segments caused by vibration or impact load during the forming process. Specifically, this process can achieve a stable and reliable anti-vibration forming effect while ensuring rapid assembly of the mold segments.

[0019] The beneficial effects achieved by this invention are as follows:

[0020] 1. In this invention, by setting oblique mating surfaces on the opposing surfaces of the first and second mold pieces, and forming interlocking protrusions and recesses on the mating surface, the two mold pieces form a unique pairing relationship when they are mated. This structure itself restricts the relative misalignment of the first and second mold pieces in the radial, circumferential, and axial directions, effectively avoiding mold piece offset problems caused by vibration or impact during the molding process, and significantly improving the positioning stability of the mold.

[0021] 2. In this invention, by setting an interlocking structure formed by the cooperation of the convex fastener and the locking fastener, the locking pin at the end of the slide bar and the locking groove on the inner side of the buckle achieve stepped groove-type limiting lock, forming a stable self-locking state under the action of the torsion spring, thereby providing a continuous and reliable locking force after the mold petals are joined, further suppressing the loosening and relative displacement of the mold petals under the molding condition.

[0022] 3. In this invention, the oblique interlocking joint structure with unique pairing function is combined with the multi-point distributed interlocking locking structure, so that the shockproof effect is achieved simultaneously by the mold lobe joint surface structure and the locking mechanism. This not only improves the vibration resistance and structural reliability of the turbine blade forming process, but also helps to ensure the forming accuracy and consistency of the mold cavity, improve the forming quality, and is suitable for stable application under high vibration and high load forming conditions. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the first and second module lobes according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the engagement state of the convex fastener and the buckle seat according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the protruding fastener and locking element structure according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the buckle seat and slide bar structure according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the buckle, lever, and toggle structure according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the buckle surface according to an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the engagement state of the buckle and the latch rod according to an embodiment of the present invention.

[0031] Figure label:

[0032] 100. Molding mold; 110. First mold segment; 120. Second mold segment; 130. Mold cavity; 111. Joint surface; 140. Positioning groove;

[0033] 200. Convex fastener; 210. Buckle head seat; 220. Sliding rod; 211. Elastic element; 221. Buckle pin rod;

[0034] 300, Locking component; 310, Slot seat; 320, Buckle; 330, Latch; 340, Toggle button; 321, Shaft; 322, Toggle ear; 323, Locking slot. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0036] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0037] The following describes, with reference to the accompanying drawings, some embodiments of a turbine blade anti-vibration forming device and process provided by the present invention.

[0038] Combination Figures 1-8 As shown, the present invention provides a turbine blade anti-vibration forming device and process, including a forming mold 100 and a plurality of protruding fasteners 200 and locking elements 300 arranged at the four corners of the forming mold 100. The protruding fasteners 200 and locking elements 300 are arranged opposite to each other and are used to lock the forming mold 100 at multiple points during the forming process, thereby improving the stability of the mold blade structure under vibration conditions.

[0039] In this embodiment, the forming mold 100 includes a first mold lobe 110 and a second mold lobe 120. The first mold lobe 110 and the second mold lobe 120 are engaged with each other in the mold-closed state and together form a mold cavity 130 for forming turbine blades. The inner wall of the mold cavity 130 is smooth to ensure the dimensional accuracy and surface quality of the turbine blades during the forming process.

[0040] Furthermore, both the first mold lobe 110 and the second mold lobe 120 have a mating surface 111 on their opposing surfaces. The mating surface 111 has a beveled structure and is used to guide and position the first mold lobe 110 and the second mold lobe 120 during the mold closing process. In this embodiment, the mating surface 111 is a non-smooth surface structure, and its surface is formed with interlocking protrusions and recesses, so that the first mold lobe 110 and the second mold lobe 120 form a unique pairing relationship in the radial, circumferential and axial directions when they are mated, thereby structurally restricting the relative misalignment of the first mold lobe 110 and the second mold lobe 120 and preventing the mold lobe from shifting due to vibration.

[0041] In this embodiment, positioning grooves 140 are provided at the four corners of the first mold lobe 110 and the second mold lobe 120. The positioning grooves 140 are used to install and position the protruding fastener 200 and the locking fastener 300, so that the installation positions of each locking structure on the forming mold 100 are consistent, thereby ensuring the synchronization and reliability of the multi-point locking structure in the mold closing state.

[0042] In this embodiment, the protruding fastener 200 includes a buckle head seat 210, a sliding rod 220, and a buckle pin 221 fixed to the surface of the sliding rod 220. The buckle head seat 210 is fixedly installed on one side of the first mold segment 110 or the second mold segment 120 to guide and support the sliding rod 220, enabling the sliding rod 220 to slide linearly in a predetermined direction. An elastic element 211 is provided on the inner side of the buckle head seat 210, which is connected to the inner side of the sliding rod 220 to provide elastic restoring force during locking or unlocking, so that the sliding rod 220 can automatically return to its original position after the external force is released.

[0043] The latching pin 221 is fixedly disposed at the end of the sliding rod 220 and moves synchronously with the movement of the sliding rod 220, so as to form an interlocking engagement with the locking structure in the latching member 300.

[0044] In this embodiment, the locking member 300 includes a slotted seat 310, which is fixedly installed on the first mold segment 110 or the second mold segment 120 corresponding to the protruding fastener 200. The surface of the slotted seat 310 has a slot for the sliding rod 220 and the buckle 320 to pass through. When the protruding fastener 200 and the locking member 300 are in the locked state, the end of the sliding rod 220 enters the inner side of the slotted seat 310, causing the locking pin 221 to enter the interior of the slotted seat 310.

[0045] Furthermore, the locking component 300 also includes a shaft 321, a buckle 320, a lever 330, and a toggle switch 340 rotatably mounted inside the slot 310. The buckle 320 is fixedly sleeved on the surface of the shaft 321 and rotates with the shaft 321. The buckle 320 has a planar spiral structure, and its inner side has several buckle grooves 323. The buckle grooves 323 abut against the surface of the locking pin 221, and the multiple buckle grooves 323 are distributed in a continuous stepped groove shape, so that the locking pin 221 forms a multi-level limiting fit after entering the buckle 320.

[0046] In this embodiment, torsion springs are provided on the shaft end surfaces of shaft 321, buckle 330, and toggle switch 340 to provide a reset torque to the corresponding components after the external force is released. Buckle 330 is axially parallel to buckle 320 and lies in the same plane as buckle 320. One end of buckle 330 abuts against the surface of buckle 320 to prevent buckle 320 from deflecting in the locked state, thereby maintaining the locked state between buckle 221 and buckle groove 323.

[0047] In actual use, the first mold segment 110 and the second mold segment 120 are first brought together along their oppositely arranged oblique mating surfaces 111. Through the interlocking of the protrusions and concave holes on the mating surfaces 111, the first mold segment 110 and the second mold segment 120 form a unique pairing and positioning relationship, and the anti-vibration positioning of the mold segments is initially completed. Subsequently, by manually turning the dial 340, the dial 340 is rotated and the latch 330 is released. Under the action of the shaft 321 and the torsion spring, the latch 320 rotates and is screwed onto the surface of the latch pin 221, so that the latch pin 221 enters the latch groove 323 on the inner side of the latch 320, thereby completing the interlocking between the protruding fastener 200 and the latching member 300.

[0048] After the convex fastener 200 and the locking fastener 300 are locked, the first mold lobe 110 and the second mold lobe 120 are reliably fixed in the mold-closed state under the unique interlocking positioning of the mating surface 111 and the multi-point interlocking locking action at the four corner positions. This effectively suppresses the relative loosening and misalignment of the mold lobe caused by vibration or impact load during the turbine blade forming process, ensuring the stability and forming accuracy of the mold cavity 130.

[0049] Working principle and usage process of this invention:

[0050] The turbine blade anti-vibration forming device of the present invention achieves stable positioning and anti-vibration locking of the first mold lobe 110 and the second mold lobe 120 during the forming process through the synergistic effect of the unique matching structure of the mold lobe and the multi-point interlocking locking structure. Its working principle and usage process are as follows.

[0051] During use, the first mold lobe 110 and the second mold lobe 120 are first brought together along their oppositely arranged oblique mating surfaces 111. Through the interlocking of the protrusions and concave holes on the mating surfaces 111, the two mold lobes form a unique pairing and positioning relationship, and complete the initial anti-vibration positioning of the mold lobes. Through the interlocking of the protrusions and concave holes on the mating surfaces 111, the ends of multiple sliding rods 220 can be inserted into the interior of each locking component 300, entering the locking state.

[0052] Subsequently, with the mold segments fully engaged, the operator can activate the lever 340 located on the locking component 300, causing the lever 340 to rotate. One end of the lever 340 abuts against the surface of the buckle 330. During activation, the lever 340 causes the buckle 330 to deflect against the force of its end torsion spring, temporarily disengaging the buckle 330 from its limiting function on the buckle 320.

[0053] After the latch 330 is released from its limit position, under the action of the torsion spring at the end of the latch 320, the latch 320 deflects and rotates around the shaft 321, causing the latch 320 to gradually screw onto the outside of the latching pin 221 that extends with the slide rod 220. When the latching pin 221 enters the latching groove 323 inside the latch 320, the latch 320 continues to deflect under the reset action of the torsion spring, so that the latching groove 323 and the surface of the latching pin 221 form an abutting fit, thereby completing the mechanical locking between the convex fastener 200 and the locking member 300.

[0054] In the above process, the buckle seat 210 guides the slide rod 220, and the elastic element 211 provides elastic restoring force to the slide rod 220, enabling the buckle pin 221 to stably enter the locking position. Through the multi-point interlocking structure at the four corners of the molding mold 100, the first mold piece 110 and the second mold piece 120 are uniformly locked in the mold-closed state, thereby effectively suppressing the loosening of the mold pieces caused by vibration or impact loads during the molding process.

[0055] When it is necessary to open the molding die 100 for part removal or maintenance, the buckle 320 can be deflected and disengaged from the locking pin 221 by manually rotating the shaft 321, thus achieving a quick and reliable unlocking operation. In this embodiment, a lug 322 located outside the slot seat 310 is provided at one end of the shaft 321, or the shaft 321 can be directly driven to rotate by a tool.

[0056] During unlocking, the operator can directly move the lever 322, which drives the shaft 321 to rotate, thereby driving the buckle 320, which is fixedly sleeved on the surface of the shaft 321, to rotate synchronously. During the rotation of the buckle 320, the buckle groove 323 on its inner side gradually disengages from the abutment state with the buckle pin 221, causing the buckle pin 221 to lose its locking constraint.

[0057] As the buckle 320 continues to rotate, the buckle pin 221, under the action of the elastic element 211, retracts to its initial position along with the slide bar 220, thereby releasing the interlocking relationship between the convex buckle 200 and the locking element 300. At this time, the first mold segment 110 and the second mold segment 120 remain in contact only through the mating surface 111, allowing the operator to separate the two mold segments and complete the demolding operation.

[0058] Based on the above working principle and usage process, this invention achieves unique pairing and positioning during the mold segment joining stage using the oblique interlocking joint surface 111; during the locking stage, reliable locking is achieved through the multi-point interlocking structure formed by the convex fastener 200 and the locking element 300; and during the unlocking stage, rapid release is achieved through the lever 322. The coordination between each structure is smooth and the logic is clear. This shock-resistant forming device can effectively resist vibration and impact loads during the turbine blade forming process, ensuring the stability and forming accuracy of the mold cavity 130, and possesses good practicality and reliability.

[0059] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A turbine blade anti-vibration forming device, characterized in that, include: The molding die (100) and a plurality of protruding fasteners (200) and locking fasteners (300) arranged at the four corners of the molding die (100), wherein the protruding fasteners (200) and locking fasteners (300) are arranged opposite to each other, and the molding die (100) includes a first mold piece (110) and a second mold piece (120), wherein the opposite surfaces of the first mold piece (110) and the second mold piece (120) are provided with a mating surface (111) and a mold cavity (130). The protruding fastener (200) includes a buckle seat (210), a slide bar (220), and a buckle pin (221) fixed to the surface of the slide bar (220). The buckle seat (210) is used to guide the slide bar (220) to slide, and the buckle seat (210) is provided with an elastic element (211) connected to the inner side of the slide bar (220). The first module (110) and the second module (120) are provided with positioning grooves (140) at their four corners for positioning and installing the protruding fastener (200) and the locking component (300); The latch (300) includes a slot (310) and a shaft (321), a buckle (330), and a knob (340) rotatably mounted inside the slot (310). The buckle (320) is fixedly sleeved on the surface of the shaft (321), and the shaft end surfaces of the shaft (321), buckle (330), and knob (340) are all provided with torsion springs. The two ends of the buckle (330) respectively abut against one end of the buckle (320) and one end of the knob (340). The buckle (320) is in a planar spiral shape, and the inner side of the buckle (320) is provided with several buckle grooves (323) that abut against the surface of the buckle pin (221). The surface of the groove seat (310) is provided with a slot for the sliding rod (220) and the buckle (320) to pass through. When the convex fastener (200) and the buckle lock (300) are in the locked state, the end of the sliding rod (220) passes into the inner side of the groove seat (310), and the buckle pin (221) abuts against the buckle groove (323) surface on the inner side of the buckle (320).

2. The turbine blade anti-vibration forming device according to claim 1, characterized in that, The mating surface (111) is inclined, and the mating surface (111) of the first mold lobe (110) and the second mold lobe (120) has a non-smooth surface structure with interlocking protrusions and concave holes.

3. The turbine blade anti-vibration forming device according to claim 1, characterized in that, The buckle (320) and the lever (330) are axially parallel, and the lever (330) and the buckle (320) are located in the same plane. One end of the lever (330) abuts against the surface of the buckle (320) to prevent the buckle (320) from deflecting.

4. The turbine blade anti-vibration forming device according to claim 1, characterized in that, The first mold lobe (110) and the second mold lobe (120) are combined through a mold cavity (130) to form a turbine blade mold cavity structure, and the inner wall of the mold cavity (130) is smooth.

5. The forming process of the turbine blade anti-vibration forming device according to claim 1, characterized in that, Includes the following steps: S1: The first module (110) and the second module (120) are brought into contact with each other along their opposite inclined mating surfaces (111). Through the interlocking protrusions and concave holes on the mating surfaces (111), the first module (110) and the second module (120) form a unique pairing and positioning relationship in the radial, circumferential and axial directions, so as to limit the relative misalignment of the first module (110) and the second module (120) under the action of vibration. S2: Manually turn the lever (340) to release the buckle (330). Under the reset action of the torsion spring provided by the shaft (321) and the buckle (330), the buckle (320) rotates and is screwed onto the surface of the buckle pin (221). The buckle pin (221) fixed to the end of the slide bar (220) enters the buckle groove (323) inside the buckle (320). S3: While completing the engagement and locking of the first mold piece (110) and the second mold piece (120), the convex fasteners (200) arranged at the four corners of the forming mold (100) are matched with the corresponding fasteners (300) to further suppress the relative loosening of the mold pieces caused by external vibration or impact load during the forming process.

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