Blade positioning reference casting mold

Abstract

The application discloses a blade positioning reference casting mold which is used for preparing a positioning reference on the periphery of a blade of an aero-engine, and comprises a lower mold, a positioning mechanism, an upper mold and a quick-release mechanism. The lower mold is provided with a clamping position for mounting the blade. The positioning mechanism comprises two positioning blocks which are slidably arranged in the lower mold and are used for abutting against opposite sides of the blade. One side of the positioning block which faces the blade is provided with a cavity for forming the positioning reference. The upper mold is used for covering the lower mold and pressing the blade into the clamping position. The quick-release mechanism is connected with the upper mold and the lower mold and is used for locking and fixing the upper mold relative to the lower mold. The blade positioning reference casting mold can form a positioning reference which is convenient to clamp and position on the periphery of the blade. The blade is clamped and positioned by using the positioning reference, so that the clamping process is simplified, and the clamping efficiency and clamping precision are improved.

Description

Blade positioning reference casting mold Technical Field

[0001] This invention relates to the field of blade processing technology for aero-engines, and in particular, to a blade positioning reference casting mold. Background Technology

[0002] Currently, the processing of aero-engine blades typically involves designing specialized fixtures based on the irregular geometric features of the blade profile to clamp and position the blades. For example, multiple positioning points on the blade are fixed according to the six-point positioning principle. This not only results in too many positioning points, leading to complex fixture structures, cumbersome clamping procedures, long processing times, and low efficiency, but also causes multiple positions on the blade to be subjected to mechanical clamping forces, which can easily cause clamping damage to the weak parts of the blade. Furthermore, due to the complex processing flow of aero-engine blades, the processing reference needs to be changed multiple times, which can easily lead to unstable blade processing quality and low production efficiency, making it difficult to meet the high-precision processing requirements of aero-engine blades. Summary of the Invention

[0003] This invention provides a blade positioning reference casting mold to solve the technical problems of high difficulty in clamping and positioning aero-engine blades and difficulty in ensuring positioning accuracy.

[0004] A blade positioning reference casting mold is provided for preparing a positioning reference on the outer periphery of an aero-engine blade. The blade positioning reference casting mold includes a lower mold, a positioning mechanism, an upper mold, and a quick-release mechanism. The lower mold is provided with a slot for mounting the blade. The positioning mechanism includes two positioning blocks slidably disposed within the lower mold. The two positioning blocks are respectively used to abut against opposite sides of the blade. The side of the positioning block facing the blade is provided with a cavity for forming the positioning reference. The upper mold is used to cover the lower mold and press the blade into the slot. The quick-release mechanism is connected to the upper mold and the lower mold respectively and is used to lock and fix the upper mold relative to the lower mold.

[0005] Preferably, the quick-release mechanism includes a quick-release component and a connector. The connector is fixedly installed on the side wall of the upper mold. The quick-release component is hinged to the side wall of the lower mold. The quick-release component includes a locking part for pressing the connector and an ejector part for lifting the connector. The quick-release component is used to rotate relative to the lower mold to a state where the locking part or the ejector part faces the connector.

[0006] Preferably, the ejector portion includes a cam arc surface, which is used to gradually eject the connector away from the lower mold during rotation, thereby driving the upper mold to gradually eject away from the lower mold through the connector.

[0007] Preferably, the ejector portion further includes a first limiting wall provided on one end of the cam arc surface away from the locking portion, and a second limiting wall provided on the side of the locking portion away from the ejector portion. Both the first limiting wall and the second limiting wall are used to abut against the connector to limit the rotational stroke of the quick-release component.

[0008] Preferably, the end of the second limiting wall away from the lower mold is provided with a clamping arm, and the clamping arm and the second limiting wall together form a hook in the shape of a "7", which is used to clamp the connector.

[0009] Preferably, the quick-release component has a clearance notch between the locking part and the ejector part, the clearance notch being used for the connector to pass through, thereby allowing the upper mold to fit tightly against the lower mold when the connector is within the clearance notch.

[0010] Preferably, the positioning mechanism further includes a limiting member hinged to the lower mold, the limiting member including a first limiting part, the first limiting part being used to press against the end of the positioning block away from the blade when the positioning block abuts against the blade.

[0011] Preferably, the positioning mechanism further includes a pressing member for pressing the positioning block into the lower mold, and the limiting member further includes a second limiting member having an angle relative to the first limiting member. The second limiting member is used to press against the pressing member when the first limiting member abuts against the positioning block, and the first limiting member is also used to rotate to a state of disengaging from the positioning block and pressing against the pressing member.

[0012] Preferably, the positioning mechanism further includes a limiting shaft and an ejector screw. The limiting shaft is mounted on the lower mold, and the limiting member is sleeved on the limiting shaft and used to rotate relative to the limiting shaft. The first limiting part and / or the second limiting part are provided with ejector screw holes that communicate with the limiting shaft. The ejector screw is installed in the ejector screw hole and used to abut against the limiting shaft.

[0013] Preferably, the locking position and / or the cavity is provided with a V-shaped protrusion, the V-shaped protrusion is used to form a V-shaped groove on the positioning reference, and the V-shaped groove is used as the breaking point of the positioning reference so as to break the positioning reference and detach it from the blade.

[0014] The present invention has the following beneficial effects:

[0015] In the blade positioning reference casting mold provided by this invention, the blade is first precisely positioned by the cooperation of the lower mold and the positioning mechanism. Then, the upper mold is placed on the lower mold to press and fix the blade. The positioning reference is prepared on the outer periphery of the blade by utilizing the space of the clamping position and the cavity. That is, a positioning reference with a regular shape and convenient clamping and positioning is formed on the outer periphery of the blade. In the subsequent blade processing operation, the positioning reference is used to clamp and position the blade. It can be directly adapted to conventional jigs, eliminating the need to design blade-specific jigs, effectively simplifying the clamping process, improving clamping efficiency and clamping accuracy, meeting the high-precision processing requirements of aero-engine blades. Furthermore, clamping and positioning by the positioning reference can also avoid damage to the weak parts of the blade caused by mechanical clamping force, effectively protecting the blade and improving the blade processing effect.

[0016] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 is a perspective view of the blade positioning reference casting mold provided in an embodiment of the present invention;

[0019] Figure 2 is an exploded view of a casting mold for the blade positioning reference shown in Figure 1;

[0020] Figure 3 is another exploded view of the casting mold for the blade positioning reference shown in Figure 1;

[0021] Figure 4 is a schematic diagram of the structure of the blade and positioning reference inside the casting mold for the blade positioning reference shown in Figure 3;

[0022] Figure 5 shows the changing state of the quick-release components in the blade positioning reference casting mold shown in Figure 1.

[0023] Figure 6 is a diagram showing the changing state of the limiting component in the blade positioning reference casting mold shown in Figure 1.

[0024] Figure 7 is a cross-sectional view of the casting mold for the blade positioning reference shown in Figure 1.

[0025] Legend:

[0026] 1. Blade positioning datum casting mold; 11. Lower mold; 111. Locking position; 12. Positioning mechanism; 121. Positioning block; 1211. Cavity; 1212. Guide groove; 122. Limiting component; 1221. First limiting part; 1222. Second limiting part; 1223. Ejector screw hole; 123. Pressing component; 124. Limiting shaft; 13. Upper mold; 131. Gate; 132. Limiting structure; 14. Quick release mechanism; 141. Quick release component; 1411. Locking part; 1412. Ejection part; 142. Connecting component; 15. V-shaped protrusion; 2. Blade; 3. Positioning datum; 31. V-groove. Detailed Implementation

[0027] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0028] Figures 1 to 7 together illustrate the blade positioning reference casting mold provided in the embodiments of the present invention, which is used to prepare a positioning reference on the outer periphery of the blade of an aero-engine, so that the irregularly shaped blade has a regular positioning reference attached to its outer periphery. The blade is clamped and positioned by the positioning reference, which effectively reduces the positioning difficulty, improves the positioning efficiency and positioning accuracy, and facilitates the processing of the blade.

[0029] As shown in Figures 1 and 2, the blade positioning reference casting mold 1 includes a lower mold 11, a positioning mechanism 12, an upper mold 13, and a quick-release mechanism 14. The lower mold 11 is provided with a locking position 111 for installing the blade 2. The positioning mechanism 12 is located inside the lower mold 11 and is used to abut against the opposite sides of the blade 2. The upper mold 13 is used to cover the lower mold 11 and press the blade 2 into the locking position 111. The quick-release mechanism 14 is connected to the upper mold 13 and the lower mold 11 respectively and is used to lock and fix the upper mold 13 relative to the lower mold 11.

[0030] Referring to Figures 2 and 3, the positioning mechanism 12 includes two positioning blocks 121 slidably disposed within the lower mold 11. The two positioning blocks 121 are respectively disposed on opposite sides of the locking position 111 and are used to abut against opposite sides of the blade 2, so as to clamp and fix the blade 2 by the two positioning blocks 121. The side of the positioning block 121 facing the blade 2 is provided with a cavity 1211 for forming the positioning reference 3. The cavity 1211 adopts a cubic structure. The upper mold 13 is provided with a gate 131 communicating with the cavity 1211. The gate 131 is used to inject alloy liquid into the cavity 1211.

[0031] Referring to Figure 4, the blade positioning reference casting mold 1 first precisely positions the blade 2 through the cooperation of the lower mold 11 and the positioning mechanism 12. Then, the upper mold 13 is placed on the lower mold 11 to press and fix the blade 2. The positioning reference 3 is prepared on the outer periphery of the blade 2 using the space of the clamping position 111 and the cavity 1211. That is, a positioning reference 3 with a regular shape is formed on the outer periphery of the blade 2, which is convenient for clamping and positioning. In the subsequent blade processing operation, the positioning reference 3 is used to clamp and position the blade 2. It can be directly adapted to conventional fixtures, without the need to design blade-specific fixtures, effectively simplifying the clamping process, improving clamping efficiency and clamping accuracy, meeting the high-precision processing requirements of aero-engine blades. Furthermore, clamping and positioning through the positioning reference 3 can also avoid damage to the weak parts of the blade 2 due to mechanical clamping force, effectively protecting the blade 2 and improving the processing effect of the blade 2.

[0032] As shown in Figure 5, preferably, the quick-release mechanism 14 includes a quick-release component 141 and a connecting component 142. The connecting component 142 is fixedly installed on the side wall of the upper mold 13. The quick-release component 141 is hinged to the side wall of the lower mold 11. The quick-release component 141 includes a locking part 1411 and an ejector part 1412. The locking part 1411 is used to press the connecting component 142 to lock the upper mold 13 relative to the lower mold 11. The ejector part 1412 is used to lift the connecting component 142, thereby driving the upper mold 13 to lift and disengage from the lower mold 11 through the connecting component 142. The quick-release component 141 is used to rotate relative to the lower mold 11 to a state where the locking part 1411 or the ejector part 1412 faces the connecting component 142.

[0033] Specifically, during mold assembly, the upper mold 13 is placed over the lower mold 11, and the quick-release component 141 is driven to rotate until the locking part 1411 faces the connector 142. The locking part 1411 can then press against the connector 142, thus locking and fixing the upper mold 13 and the lower mold 11. When the positioning reference 3 is prepared and the mold is disassembled, the quick-release component 141 is directly driven to rotate until the ejector part 1412 faces the connector 142. This causes the locking part 1411 to disengage from the connector 142, achieving automatic unlocking. At the same time, the ejector part 1412 lifts the connector 142, thereby causing the upper mold 13 to automatically rise and disengage from the lower mold 11 through the connector 142. In other words, the unlocking and disassembly operations can be achieved simultaneously by rotating the quick-release component 141, without the need for additional tools to pry open the upper mold 13, making it convenient and quick to use.

[0034] Preferably, the ejector portion 1412 includes a cam arc surface, which is used to gradually eject the connector 142 away from the lower mold 11 during rotation, thereby driving the upper mold 13 to gradually eject away from the lower mold 11 through the connector 142. During demolding, the oscillating action of the cam arc surface gradually pushes the connector 142 away, resulting in more even and stable force distribution, smoother rotation, and less effort required for use.

[0035] Furthermore, the ejector portion 1412 also includes a first limiting wall provided on one end of the cam arc surface away from the locking portion 1411, and a second limiting wall provided on the side of the locking portion 1411 away from the ejector portion 1412. Both the first limiting wall and the second limiting wall are used to abut against the connector 142 to limit the rotational stroke of the quick-release member 141.

[0036] Specifically, the first limiting wall abuts against the connecting member 142 when the cam arc surface fully ejects the upper mold 13, preventing the quick-release member 141 from continuing to rotate away from the locking part 1411, thus avoiding over-rotation and facilitating quick mold removal. Similarly, the second limiting wall abuts against the connecting member 142 when the locking part 1411 fully engages the connecting member 142, preventing the quick-release member 141 from continuing to rotate away from the ejection part 1412, thus facilitating quick engagement and ensuring engagement accuracy.

[0037] Preferably, a clamping arm is provided at the end of the second limiting wall away from the lower mold 11. The clamping arm and the second limiting wall together form a "7"-shaped hook, which is used to clamp the connector 142. The clamping arm is provided with a guide slope for guiding the connector 142 into the hook. By clamping the connector 142 with the "7"-shaped hook, the top and side surfaces of the connector 142 can be limited and fixed simultaneously, effectively pressing the connector 142.

[0038] More preferably, quick-release parts 141 are provided on both opposite sides of the lower mold 11, and the rotational fastening directions of the quick-release parts 141 on different sides of the lower mold 11 are opposite. The connecting parts 142 are provided in a one-to-one correspondence with the quick-release parts 141, so that the locking parts 1411 on the multiple quick-release parts 141 respectively fasten the corresponding connecting parts 142 from different directions, thereby improving the limiting strength and preventing the multiple quick-release parts 141 from being vibrated and loosened in one direction due to vibration and other factors during the use of the blade positioning reference casting mold 1, thus ensuring the fastening stability.

[0039] Preferably, the quick-release member 141 has a clearance notch between the locking part 1411 and the ejector part 1412. The clearance notch is used for the connector 142 to pass through, so that when the connector 142 is in the clearance notch, the upper mold 13 can fit tightly against the lower mold 11. This facilitates the assembly of the upper mold 13 from the clearance notch and avoids interference between the hook and the ejector part 1412, which would prevent the upper mold 13 from being pressed into place.

[0040] Furthermore, the quick-release component 141 is provided with a center positioning structure, which is used to cooperate and position relative to the lower mold 11 when the clearance notch is facing the connector 142, so as to drive the quick-release component 141 to rotate quickly to the state where the clearance notch is facing the connector 142, so as to facilitate the assembly of the upper mold 13.

[0041] As shown in Figure 6, the positioning mechanism 12 further includes a limiting member 122 hinged to the lower mold 11. The limiting member 122 includes a first limiting part 1221, which is used to press against the end of the positioning block 121 away from the blade 2 when the positioning block 121 abuts against the blade 2. By rotating the limiting member 122 to rotate the first limiting part 1221 to the state of pressing against the positioning block 121, the positioning block 121 can be limited and fixed, and the fixing structure is simple and efficient.

[0042] Referring to Figures 2 and 3, preferably, the positioning mechanism 12 further includes a pressing member 123, which is connected to the lower mold 11 and used to press the positioning block 121 into the lower mold 11. The limiting member 122 further includes a second limiting member 1222 having an angle relative to the first limiting member 1221. The second limiting member 1222 is used to press against the pressing member 123 when the first limiting member 1221 abuts against the positioning block 121. The first limiting member 1221 is also used to rotate to a state where it is disengaged from the positioning block 121 and presses against the pressing member 123.

[0043] Specifically, when in use, the limiting member 122 can abut against the positioning block 121 through the first limiting part 1221 and abut against the pressing member 123 through the second limiting part 1222, thereby achieving the abutment and fixation of the positioning block 121 and the pressing member 123. When the limiting member 122 is driven to rotate at a certain angle, the first limiting part 1221 can be driven to rotate to a state where it is disengaged from the positioning block 121 and abuts against the pressing member 123. At this time, only the pressing member 123 is abutted and fixed. Under the guiding action of the pressing member 123, the positioning block 121 is allowed to slide away from or near the blade 2 along the pressing member 123, which facilitates quick disassembly and assembly of the blade 2. When it is necessary to replace the positioning block 121 to adapt to different specifications of blade 2 or different specifications of positioning reference 3, the limiting member 122 can be driven to rotate to a state where it is completely separated from the positioning block 121 and the pressing member 123, so as to facilitate the removal of the positioning block 121 and the pressing member 123.

[0044] Furthermore, multiple limiting members 122 are provided at intervals along the edge of the positioning block 121, and the positioning block 121 is limited and fixed at different positions by the multiple limiting members 122, thereby enhancing the limiting effect.

[0045] As shown in Figure 1, the positioning mechanism 12 further includes a limiting shaft 124 and a set screw (not shown in the figure, the same below). The limiting shaft 124 is mounted on the lower mold 11, and the limiting member 122 is sleeved on the limiting shaft 124 and used to rotate relative to the limiting shaft 124. The first limiting part 1221 and / or the second limiting part 1222 are provided with a set screw hole 1223 communicating with the limiting shaft 124. The set screw is installed in the set screw hole 1223 and used to abut against the limiting shaft 124. The circumferential fixation of the limiting member 122 is achieved by the set screw. The fixing structure is simple and efficient, and will not interfere with the limiting fit between the limiting member 122 and the positioning block 121 and the pressing member 123.

[0046] As shown in Figure 7, preferably, the locking position 111 and / or the cavity 1211 are provided with a V-shaped protrusion 15. The V-shaped protrusion 15 is used to form a V-shaped groove 31 on the positioning reference 3. The V-shaped groove 31 serves as a breaking point for the positioning reference 3 so as to break the positioning reference 3 and detach it from the blade 2. By setting the V-shaped protrusion 15 to form a V-shaped groove 31 on the positioning reference 3, it is convenient to quickly break the positioning reference 3 after the blade 2 is processed, so that the positioning reference 3 is completely detached from the blade 2, and a complete blade 2 is obtained.

[0047] Furthermore, the upper mold 13 is provided with a limiting structure 132 that is adapted to the shape of the blade 2 on the side facing the locking position 111. By pressing and fixing the blade 2 through the limiting structure 132, the positioning effect can be enhanced, and one side of the blade 2 can be blocked so that one side of the blade 2 does not form a positioning reference 3, which facilitates the processing of the blade 2.

[0048] Furthermore, the positioning block 121 is also provided with a material guide groove 1212, which is used to connect the gate 131 and the cavity 1211 to guide the molten alloy in the gate 131 into the cavity 1211.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A casting mold for positioning a blade, characterized in that, The blade positioning reference casting mold is used to prepare a positioning reference (3) on the outer periphery of an aero-engine blade (2). The blade positioning reference casting mold includes a lower mold (11), a positioning mechanism (12), an upper mold (13), and a quick-release mechanism (14). The lower mold (11) is provided with a slot (111) for mounting the blade (2). The positioning mechanism (12) includes two positioning blocks (121) slidably disposed in the lower mold (11). The two positioning blocks (121) are respectively used to abut against the opposite sides of the blade (2). The side of the positioning block (121) facing the blade (2) is provided with a cavity (1211) for forming the positioning reference (3). The upper mold (13) is used to cover the lower mold (11) and press the blade (2) into the slot (111). The quick-release mechanism... The mechanism (14) is connected to the upper mold (13) and the lower mold (11) respectively and is used to lock the upper mold (13) relative to the lower mold (11); the quick release mechanism (14) includes a quick release part (141) and a connecting part (142). The connecting part (142) is fixedly installed on the side wall of the upper mold (13). The quick release part (141) is hinged to the side wall of the lower mold (11). The quick release part (141) includes a locking part (1411) for pressing the connecting part (142) and an ejection part (1412) for lifting the connecting part (142). The quick release part (141) is used to rotate relative to the lower mold (11) to a state where the locking part (1411) or the ejection part (1412) faces the connecting part (142).

2. The blade positioning reference casting mold according to claim 1, characterized in that, The ejector (1412) includes a cam arc surface, which is used to eject the connector (142) gradually away from the lower mold (11) during rotation, thereby driving the upper mold (13) to be ejected gradually away from the lower mold (11) through the connector (142).

3. The blade positioning reference casting mold according to claim 2, characterized in that, The ejector portion (1412) further includes a first limiting wall on the end of the cam arc surface away from the locking portion (1411), and a second limiting wall is provided on the side of the locking portion (1411) away from the ejector portion (1412). Both the first limiting wall and the second limiting wall are used to abut against the connector (142) to limit the rotational stroke of the quick-release component (141).

4. The blade positioning reference casting mold according to claim 3, characterized in that, The second limiting wall is provided with a clamping arm at one end away from the lower mold (11). The clamping arm and the second limiting wall together form a "7" shaped hook, which is used to clamp the connector (142).

5. The blade positioning reference casting mold according to claim 1, characterized in that, The quick-release part (141) has a clearance notch between the locking part (1411) and the ejector part (1412). The clearance notch is for the connector (142) to pass through, so that when the connector (142) is in the clearance notch, the upper mold (13) can fit tightly against the lower mold (11).

6. The blade positioning reference casting mold according to claim 1, characterized in that, The positioning mechanism (12) further includes a limiting member (122) hinged to the lower mold (11). The limiting member (122) includes a first limiting part (1221), which is used to press against the end of the positioning block (121) away from the blade (2) when the positioning block (121) abuts against the blade (2).

7. The blade positioning reference casting mold according to claim 6, characterized in that, The positioning mechanism (12) further includes a pressing member (123) for pressing the positioning block (121) into the lower mold (11), and the limiting member (122) further includes a second limiting member (1222) having an angle relative to the first limiting member (1221). The second limiting member (1222) is used to press the pressing member (123) against the positioning block (121) when the first limiting member (1221) abuts against the positioning block (121). The first limiting member (1221) is also used to rotate to a state where it is disengaged from the positioning block (121) and presses against the pressing member (123).

8. The blade positioning reference casting mold according to claim 7, characterized in that, The positioning mechanism (12) further includes a limiting shaft (124) and a set screw. The limiting shaft (124) is mounted on the lower mold (11). The limiting member (122) is sleeved on the limiting shaft (124) and is used to rotate relative to the limiting shaft (124). The first limiting part (1221) and / or the second limiting part (1222) are provided with a set screw hole (1223) communicating with the limiting shaft (124). The set screw is installed in the set screw hole (1223) and is used to abut against the limiting shaft (124).

9. The blade positioning reference casting mold according to claim 1, characterized in that, The card slot (111) and / or the cavity (1211) are provided with a V-shaped protrusion (15), the V-shaped protrusion (15) is used to form a V-shaped groove (31) on the positioning reference (3), and the V-shaped groove (31) is used as the breaking point of the positioning reference (3) so as to break the positioning reference (3) and detach it from the blade (2).

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