Turbine blade ceramic core pressing device

Abstract

The invention relates to the field of turbine blade manufacturing and discloses a turbine blade ceramic core pressing device. Comprising a lower mold, a lower mold core arranged at the upper end of the lower mold, an upper mold arranged at the upper end of the lower mold, an upper mold core arranged at the lower end of the upper mold, an ejection mechanism arranged on the lower mold and used for ejecting out a mold core body in the lower mold core, and a material filling groove formed in the lower mold core, the reinforcing ribs are used for filling the variable parts of the mold core body with the reinforcing ribs; the grooving unit is arranged on the lower mold core and adjustably arranged in the filling groove, reinforcing ribs can be formed on the mold core body, the whole mold core body can be more stable, the phenomena of deformation and damage of the mold core body in the firing process are reduced, the strength of the mold core is effectively improved, and the service life of the mold core is prolonged. And the service life of the mold core in the pouring process is prolonged, so that the performance and the reliability of the turbine blade are improved.

Description

Technical Field

[0001] The invention relates to the technical field of turbine blade manufacturing, in particular to a turbine blade ceramic core pressing device. Background Art

[0002] Turbine blades are key components in power plants such as gas turbines and aircraft engines, and usually have complex cooling channels inside. In order to form these cooling channels, ceramic cores are required during the casting process.

[0003] The existing equipment has the following disadvantages: the core will deform during solidification, and then the strength of the core arc position is insufficient, resulting in the problem of core breakage during blade casting. In addition, the core needs to be corrected after solidification to ensure the accuracy of the cooling channel inside the turbine blade.

[0004] Therefore, the present application proposes a turbine blade ceramic core pressing device to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a turbine blade ceramic core pressing device to solve the above-mentioned problem that the strength at the arc position of the core is insufficient and the core is broken during the blade casting process. In addition, the core needs to be corrected after solidification to ensure the accuracy of the cooling channel inside the turbine blade, and the pressure distribution is uneven during the pressing process of the mold, which easily leads to inconsistent core density and affects the quality and performance of the core.

[0006] To achieve the above object, the present invention provides the following technical solution: a turbine blade ceramic core pressing device, comprising a lower die, a lower die core arranged at the upper end of the lower die, an upper die arranged at the upper end of the lower die, an upper die core arranged at the lower end of the upper die, and an ejection mechanism arranged on the lower die for ejecting a core body in the lower die core, and further comprising:

[0007] A filling groove is provided on the lower mold core and is used to fill the core body with reinforcing ribs;

[0008] A grooving unit is arranged on the lower die core and can be adjusted inside the filling trough to groove the reinforcing ribs.

[0009] Among them, the grooving unit includes a movable frame which can be raised and lowered in the lower mold and located inside the filling trough, a partition fixed at the upper end of the movable frame, a connecting rod fixed on one side of the movable frame, and an adjusting mechanism arranged on the connecting rod on the side outside the lower mold for adjusting the installation position of the partition, the adjusting mechanism is connected to the ejection rod on the ejection mechanism through a wire rope, a movable groove for the movable frame to move and connected to the filling trough is provided on the lower mold, and a through groove for the wire rope to move is provided on the lower mold.

[0010] Wherein, the partition is arranged in an inverted V shape.

[0011] Wherein, a first elastic member is arranged between the upper end of the partition and the movable groove.

[0012] Wherein, a connecting groove for movement of the connecting rod is provided at a position of the lower mold core corresponding to the connecting rod, a sliding block is provided at a position where the connecting rod is connected to the connecting groove, and a sliding groove for movement of the sliding block is provided on the lower mold core.

[0013] Wherein, the adjustment mechanism includes a movable plate fixed on the connecting rod, a bottom plate fixed on the side of the movable plate away from the connecting rod, a side plate fixed on the upper end of the bottom plate, and a fixing member arranged on the movable plate for fixing the movable plate to the lower mold core, the steel wire rope is passed through the side plate, and a through hole is opened on the side plate for the movement of the steel wire rope.

[0014] Among them, the fixing part includes a fixing frame fixed on the movable plate, a fixing rod inserted into the fixing frame and a limiting plate sleeved on the fixing rod. The fixing rod is plugged and fixed on the lower mold core. A fixing groove for fixing the fixing rod is opened at the position of the lower mold core corresponding to the fixing rod. The fixing rod is fixedly connected to the steel wire rope.

[0015] Wherein, the fixing rod is located between the fixing frame and the limiting plate and is sleeved with a second elastic member.

[0016] Wherein, a hook is arranged on one side where the steel wire rope is connected to the fixing rod.

[0017] Wherein, the partition is arranged at the position where the core body is connected to the reinforcing rib.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The grouting of the present invention is filled inside the filling trough, and reinforcing ribs can be formed on the core body, which can make the core body more stable and reduce the deformation and damage of the core body during the firing process. The lower mold core and the upper mold core match the structure of the turbine blade, so that the core body after molding can match the structure of the turbine blade. After the core body is manufactured, the upper mold moves up, and the ejection mechanism is controlled to eject the core body from the lower mold core. The pressure, flow rate, and temperature pressing time of the grouting are controlled by the control system to ensure that the density and strength of the core body are uniform and can be fully filled. The turbine blade ceramic core structure adopts a combination of the core body and reinforcing ribs, which effectively improves the strength of the core and the service life of the core during the casting process, thereby improving the performance and reliability of the turbine blade.

[0020] 2. In the present invention, when the adjusting mechanism drives the partition to move upward, the movable frame squeezes the first elastic member. When the ejection mechanism drives the ejection rod to lift the core body, the wire rope pulls the adjusting mechanism to move, contacts the restriction of the adjusting mechanism on the movable frame, and then the first elastic member can release the squeezing instantly, which can drive the movable frame to move downward quickly, so that the partition is quickly withdrawn from the inside of the reinforcement rib, and the reinforcement rib is less likely to crack on the partition when the core body is ejected upward, thereby improving the demolding efficiency of the core body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure in one embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the core body in the lower mold in one embodiment of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the upper mold in front view in one embodiment of the present invention;

[0024] Figure 4 It is a schematic structural diagram of an upper mold in an embodiment of the present invention when viewed from above;

[0025] Figure 5 It is a structural schematic diagram of a core body in one embodiment of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the lower mold in front view in one embodiment of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the lower mold in a top view in one embodiment of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the reinforcing ribs in the core body in one embodiment of the present invention;

[0029] Fig. 9It is a structural schematic diagram of the slotting position of the reinforcing rib in one embodiment of the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the grooving unit on the lower die core in one embodiment of the present invention;

[0031] Fig.11 A schematic diagram of the structure of a grooving unit in one embodiment of the present invention;

[0032] Fig.12 It is a structural schematic diagram of an adjustment mechanism in one embodiment of the present invention;

[0033] Fig.13 It is a structural schematic diagram of a fixing member in one embodiment of the present invention;

[0034] Fig.14 It is a schematic diagram of the structure of the connection between the partition and the lower mold core in one embodiment of the present invention.

[0035] In the figure: 1, lower die; 11, lower die core; 1101, filling slot; 1102, moving slot; 1103, connecting slot; 1104, sliding slot; 1105, fixing slot; 1106, through slot; 12, slot cutting unit; 121, moving frame; 1211, first elastic member; 122, partition; 123, connecting rod; 1231, slider; 124, adjusting mechanism; 1241, moving plate; 124 2. Bottom plate; 1243. Side plate; 124301. Perforation; 1244. Fixing piece; 12441. Fixing frame; 12442. Fixing rod; 12443. Limiting plate; 12444. Second elastic piece; 125. Wire rope; 1251. Hook; 2. Upper mold; 21. Upper mold core; 3. Core body; 31. Reinforcement rib; 3101. Slotting; 4. Ejection mechanism; 41. Ejection rod. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-14 The present invention provides a technical solution: a turbine blade ceramic core pressing device, comprising a lower mold 1, a lower mold core 11 arranged at the upper end of the lower mold 1, an upper mold 2 arranged at the upper end of the lower mold 1, an upper mold core 21 arranged at the lower end of the upper mold 2, and an ejection mechanism 4 arranged on the lower mold 1 for ejecting a core body 3 in the lower mold core 11, and further comprising:

[0038] A filling groove 1101 is provided on the lower mold core 11 and is used to fill the reinforcing rib 31 at the easily deformed part of the core body 3;

[0039] The grooving unit 12 is disposed on the lower die core 11 and is adjustably disposed inside the filling groove 1101 for grooving the reinforcing rib 31 .

[0040] It should be noted that, during operation, the lower mold 1 and the upper mold 2 are molded together, and then grout is injected from the pouring ports on the lower mold 1 and the upper mold 2 into the interior of the lower mold core 11 and the upper mold core 21, and a filling groove 1101 is opened at a position where the arc-shaped empty groove area of ​​the core body 3 on the lower mold core 11 and the upper mold core 21 is larger. During the pouring process, the grout is filled in the interior of the filling groove 1101, and a reinforcing rib 31 can be formed on the core body 3, which can make the entire core body 3 more stable and reduce the deformation and damage of the core body 3 during the firing process. The lower mold core 11 and the upper mold core 21 are in contact with the turbine blade structure. Matching is carried out so that the formed core body 3 can match the structure of the turbine blade. After the core body 3 is manufactured, the upper mold 2 moves up to control the ejection mechanism 4 to eject the core body 3 from the lower mold core 11, and the pressure, flow rate and temperature pressing time of the grouting are controlled by the control system to ensure that the density and strength of the core body 3 are uniform and can be fully filled. The turbine blade ceramic core structure adopts the combination of the core body 3 and the reinforcing ribs 31, which effectively improves the strength of the core and the service life of the core during the casting process, thereby improving the performance and reliability of the turbine blade.

[0041] In one embodiment, the grooving unit 12 includes a movable frame 121 which can be raised and lowered in the lower mold core 11 and located inside the filling groove 1101, a partition 122 fixed at the upper end of the movable frame 121, a connecting rod 123 fixed on one side of the movable frame 121, and an adjusting mechanism 124 arranged on the side of the connecting rod 123 located outside the lower mold core 11 for adjusting the installation position of the partition 122. The adjusting mechanism 124 is connected to the ejection rod 41 on the ejection mechanism 4 through a wire rope 125. A movable groove 1102 is provided on the lower mold core 11 for the movable frame 121 to move and is connected to the filling groove 1101, and a through groove 1106 is provided on the lower mold core 11 for the wire rope 125 to move.

[0042] This design, see Figure 8-14, the position of the partition 122 in the charging trough 1101 can be accurately adjusted through the adjustment mechanism 124. Before pouring the ceramic glue, the connecting rod 123 is driven to move up, and then the partition 122 is moved up, and then the adjustment mechanism 124 is fixed to the lower mold core 11, so that the partition 122 is installed at the set position, so that the reinforcing rib 31 inside the charging trough 1101 can form an opening at the lower end, which can not only ensure the stability of the reinforcing rib 31 supporting the core body 3, but also facilitate the subsequent removal work. This design allows the slotting position of the reinforcing rib 31 to be flexibly adjusted according to the specific needs of the core body 3. The adjustment mechanism 124 is connected to the ejection rod on the ejection mechanism 4 through the wire rope 125 41 is connected to realize the automatic operation of the grooving unit 12. When the ejection mechanism 4 is working, the movement of the ejection rod 41 will drive the wire rope 125 to pull the adjusting mechanism 124, and then drive the movable frame 121 and the partition 122 to move downward, so that the partition 122 is pulled out from the inside of the reinforcing rib 31. This automated design does not require subsequent manual intervention to disassemble the partition 122, thereby improving production efficiency and reducing the complexity of manual operation. The various components of the grooving unit 12 are compactly integrated in the lower die core 11, and are closely matched with the lower die core 11 through the movable groove 1102 and the through groove 1106. This design makes it easy to integrate the grooving unit 12 into the entire pressing device without affecting the normal operation of other components.

[0043] In one embodiment, the partition 122 is arranged in an inverted V-shape.

[0044] This design, see Fig.10 The inverted V-shaped design enables the partition 122 to form a V-shaped opening at the lower end of the reinforcing rib 31, which facilitates the subsequent separation of the reinforcing rib 31 from the core body 3.

[0045] In one embodiment, a first elastic member 1211 is disposed between the upper end of the partition plate 122 and the moving groove 1102 , and the first elastic member 1211 is made of a damped spring or an elastic pad.

[0046] This design, see Fig.11 ,as well as Fig.14 When the adjusting mechanism 124 drives the partition 122 to move upward, the movable frame 121 squeezes the first elastic member 1211. When the ejection mechanism 4 drives the ejection rod 41 to lift the core body 3, the wire rope 125 pulls the adjusting mechanism 124 to move, and contacts the restriction of the movable frame 121 by the adjusting mechanism 124. Then, the first elastic member 1211 can release the squeezing instantly, and can drive the movable frame 121 to move downward quickly, so that the partition 122 is quickly withdrawn from the inside of the reinforcing rib 31, and the reinforcing rib 31 is less likely to crack on the partition 122 when the core body 3 is ejected upward, thereby improving the demolding efficiency of the core body 3.

[0047] In one embodiment, a connecting groove 1103 for the connecting rod 123 to move is provided at the position of the lower mold core 11 corresponding to the connecting rod 123, a slider 1231 is provided at the position where the connecting rod 123 and the connecting groove 1103 are connected, and a sliding groove 1104 for the slider 1231 to move is provided on the lower mold core 11.

[0048] This design, see Figure 11-13 The connecting groove 1103 provides a clear path and direction for the movement of the connecting rod 123, ensuring the stability and accuracy of the connecting rod 123 during the movement. The cooperation between the slider 1231 and the slide groove 1104 further enhances the guidance of the movement and reduces the deviation and shaking of the connecting rod 123 during the movement. This design makes the disassembly and installation of the connecting rod 123 and the slider 1231 more convenient, which is convenient for the maintenance and adjustment of the mold.

[0049] In one embodiment, the adjustment mechanism 124 includes a movable plate 1241 fixed on the connecting rod 123, a bottom plate 1242 fixed on the side of the movable plate 1241 away from the connecting rod 123, a side plate 1243 fixed on the upper end of the bottom plate 1242, and a fixing member 1244 arranged on the movable plate 1241 for fixing the movable plate 1241 to the lower mold core 11, the wire rope 125 is passed through the side plate 1243, and a through hole 124301 is opened on the side plate 1243 for the movement of the wire rope 125.

[0050] This design, see Figure 10-13 , connect the wire rope 125 with the fixing part 1244, move the movable plate 1241 upward, so that the fixing part 1244 moves up to the set position, and the fixing part 1244 is fixed on the lower mold core 11, so as to realize the precise adjustment and fixation of the position of the partition 122. The stability of the partition 122 during operation is ensured by the fixing part 1244, and the processing accuracy and reliability of the mold are improved. The wire rope 125 is passed through the through hole 124301 on the side plate 1243, so as to realize the connection between the ejector rod 41 and the fixing part 1244, so as to facilitate the ejector rod 41 to drive the fixing part 1244 to release the fixing work of the lower mold core 11, and then facilitate the first elastic part 1211 to mobilize the movable frame 121 to move downward.

[0051] In one embodiment, the fixing member 1244 includes a fixing frame 12441 fixed on the movable plate 1241, a fixing rod 12442 inserted into the fixing frame 12441, and a limiting plate 12443 sleeved on the fixing rod 12442. The fixing rod 12442 is inserted and fixed on the lower mold core 11. A fixing groove 1105 for fixing the fixing rod 12442 is provided at a position of the lower mold core 11 corresponding to the fixing rod 12442. The fixing rod 12442 is fixedly connected to the wire rope 125.

[0052] This design, see Fig.12 ,as well as Fig.13 When the fixing rod 12442 moves to the position of the fixing groove 1105, the fixing rod 12442 is clamped and fixed inside the fixing groove 1105, completing the fixing work of the connecting rod 123 and the lower mold core 11, ensuring the stability of the connection between the partition 122 and the lower mold core 11, and preventing displacement or loosening due to external force or vibration. The fixing rod 12442 is fixedly connected to the wire rope 125, and the fixing rod 12442 can be easily pulled out of the fixing groove 1105 by pulling the wire rope 125.

[0053] In one embodiment, the fixing rod 12442 is located between the fixing frame 12441 and the limiting plate 12443 and is sleeved with a second elastic member 12444 . The second elastic member 12444 is made of a damped spring or an elastic pad.

[0054] This design, see Fig.13 During normal use, the fixing rod 12442 abuts against the outer side of the lower mold core 11, and the limiting plate 12443 squeezes the second elastic member 12444. When the fixing rod 12442 moves into the fixing groove 1105, the second elastic member 12444 drives the limiting plate 12443 to move toward the side close to the fixing groove 1105, and then the fixing rod 12442 is clamped and fixed in the fixing groove 1105, thereby ensuring the stability and durability of the mold during long-term operation.

[0055] In one embodiment, a hook 1251 is provided on one side where the steel wire rope 125 is connected to the fixing rod 12442 .

[0056] This design, see Fig.12 ,as well as Fig.13 The design of the hook 1251 makes the connection between the wire rope 125 and the fixing rod 12442 more convenient and quick. Through a simple hooking operation, the wire rope 125 and the fixing rod 12442 can be firmly connected without complicated tools or additional fixing devices. At the same time, when disassembly is required, the wire rope 125 and the fixing rod 12442 can be quickly separated by simply unhooking the hook 1251.

[0057] In one embodiment, the partition plate 122 is disposed at a position where the core body 3 and the reinforcing rib 31 are connected.

[0058] This design, see Fig.10The partition 122 serves as a slotted structure for the reinforcing rib 31, and the lower half of the reinforcing rib 31 is slotted, which can not only ensure the strength and rigidity of the reinforcing rib 31 supporting the core body 3 and prevent deformation due to pressure during the injection molding process, but also facilitate the removal of the reinforcing rib 31 from the core body 3 after the core body 3 is fired, insert the seesaw into the slot 3101 at the lower end of the reinforcing rib 31, and then rotate the seesaw to separate the reinforcing rib 31 from the core body 3.

[0059] In addition, if there are descriptions involving "first", "second", etc. in the embodiments, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying the importance of the relative description or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

Claims

1. A turbine blade ceramic core pressing device, comprising a lower mold (1), a lower mold core (11) arranged at the upper end of the lower mold (1), an upper mold (2) arranged at the upper end of the lower mold (1), an upper mold core (21) arranged at the lower end of the upper mold (2), and an ejection mechanism (4) arranged on the lower mold (1) for ejecting a core body (3) in the lower mold core (11), characterized in that: Also includes: A filling groove (1101) is provided on the lower mold core (11) and is used to fill the reinforcing rib (31) into the core body (3); A grooving unit (12) is arranged on the lower die core (11) and is adjustably arranged inside the filling trough (1101), and is used to groove the reinforcing rib (31).

2. The turbine blade ceramic core pressing device according to claim 1, characterized in that: The grooving unit (12) comprises a movable frame (121) which can be lifted and lowered and is arranged in the lower mold core (11) and is located inside the filling groove (1101), a partition (122) fixed at the upper end of the movable frame (121), a connecting rod (123) fixed on one side of the movable frame (121), and an adjustment mechanism (124) arranged on the side of the connecting rod (123) located outside the lower mold core (11) for adjusting the installation position of the partition (122), the adjustment mechanism (124) is connected to the ejection rod (41) on the ejection mechanism (4) through a steel wire rope (125), the lower mold core (11) is provided with a movable groove (1102) for the movable frame (121) to move and is connected to the filling groove (1101), and the lower mold core (11) is provided with a through groove (1106) for the steel wire rope (125) to move.

3. The turbine blade ceramic core pressing device according to claim 2, characterized in that: The partition (122) is arranged in an inverted V-shape.

4. The turbine blade ceramic core pressing device according to claim 2, characterized in that: A first elastic member (1211) is provided between the upper end of the partition plate (122) and the movable groove (1102).

5. The turbine blade ceramic core pressing device according to claim 2, characterized in that: The lower mold core (11) is provided with a connecting groove (1103) for the connecting rod (123) to move at a position corresponding to the connecting rod (123), a sliding block (1231) is provided at a position where the connecting rod (123) is connected to the connecting groove (1103), and a sliding groove (1104) for the sliding block (1231) to move is provided on the lower mold core (11).

6. The turbine blade ceramic core pressing device according to claim 2, characterized in that: The adjusting mechanism (124) comprises a movable plate (1241) fixed on the connecting rod (123), a bottom plate (1242) fixed on the side of the movable plate (1241) away from the connecting rod (123), a side plate (1243) fixed on the upper end of the bottom plate (1242), and a fixing member (1244) arranged on the movable plate (1241) for fixing the movable plate (1241) to the lower mold core (11), the steel wire rope (125) is passed through the side plate (1243), and the side plate (1243) is provided with a through hole (124301) for the steel wire rope (125) to move.

7. The turbine blade ceramic core pressing device according to claim 6, characterized in that: The fixing member (1244) comprises a fixing frame (12441) fixed on the movable plate (1241), a fixing rod (12442) inserted through the fixing frame (12441) and a limiting plate (12443) sleeved on the fixing rod (12442); the fixing rod (12442) is plugged and fixed on the lower mold core (11); a fixing groove (1105) for fixing the fixing rod (12442) is provided at a position of the lower mold core (11) corresponding to the fixing rod (12442); the fixing rod (12442) is fixedly connected to the steel wire rope (125).

8. The turbine blade ceramic core pressing device according to claim 7, characterized in that: The fixing rod (12442) is located between the fixing frame (12441) and the limiting plate (12443) and is sleeved with a second elastic member (12444).

9. The turbine blade ceramic core pressing device according to claim 7, characterized in that: A hook (1251) is provided on one side of the steel wire rope (125) connected to the fixing rod (12442).

10. The turbine blade ceramic core pressing device according to claim 2, characterized in that: The partition plate (122) is arranged at a position where the core body (3) and the reinforcing rib (31) are connected.

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