A blade crown correction machine

Abstract

The present invention discloses a blade crown correction machine, comprising a base frame, two pressing pieces are fixed on the base frame by screws and nuts, the bottoms of the two pressing pieces are in contact with one side of the blade root close to the blade, the end faces of the two pressing pieces are in contact with the blade, and the top of the base frame is detachably connected to a support seat by screws, and a hydraulic correction component is movably provided on the support seat; the present invention fixes the pressing pieces by screws and nuts, fixes the blades by the pressing pieces, fixes the support seat on one side of the base frame, and provides a movable hydraulic correction component on the support seat, and presses the blade crown by the hydraulic correction component to realize correction of the blade crown part, and can correct any part of the bottom of the blade crown, avoiding the places that cannot be corrected by hammering or wrench. The use of hydraulic pressing correction reduces labor intensity and work difficulty, improves production efficiency, can ensure that the correction amount is controllable, and is suitable for correcting the blade crown parts of various blades.

Description

Technical Field

[0001] The present invention relates to the technical field of precision casting correction, in particular to a blade crown correction machine. Background Art

[0002] With the continuous development of the aviation industry and gas turbines, blade components are increasingly used in aviation, aerospace, and steam turbine engines. Most parts used in high-temperature environments are produced using investment casting. It's common knowledge that blades are the most numerous and crucial components in a steam turbine. Blades generally consist of a root, a body, and a shroud. A cylinder contains numerous stator and rotor blades, each consisting of a single stage. Superheated steam enters the first-stage stator blades through a steam port. The stator blades guide the steam to the rotor blades, pushing the rotor and converting thermal energy into mechanical energy. This results in extremely demanding dimensional requirements for blades in gas turbine engines, making parts produced using investment casting even more challenging. In actual production, castings can deform due to casting stresses, uneven removal of the wax pattern from the mold, or problems with the ejector mechanism, leading to dimensional and positional errors. Casting deformation is typically addressed by correcting the casting, typically using tools such as a vise, a brass hammer, a workbench, and a wrench. After the deformed casting is fixed in a vise and the deformed part is corrected by hammering with a copper hammer or using a wrench, the casting is placed on a testing platform for testing, and this process is repeated until the size meets the technical requirements. However, due to the special position of the blade crown, it is often difficult to achieve the correction effect on the inner side of the blade crown by hammering or using a copper hammer, resulting in a large number of castings being scrapped due to correction reasons. In addition, the labor intensity and work difficulty of using the copper hammer or wrench correction method are high, and the production efficiency cannot be effectively improved. Summary of the Invention

[0003] The main purpose of the present invention is to provide a blade crown correction machine, which uses a screw and a nut to fix the pressure piece, uses the pressure piece to fix the blade, fixes the support seat on one side of the base frame, and provides a movable hydraulic correction component on the support seat. The hydraulic correction component is used to press the blade crown to achieve correction of the blade crown part. Correction can be performed on any part of the bottom of the blade crown, avoiding the places that cannot be corrected by copper hammers or wrenches. The use of hydraulic pressure correction reduces labor intensity and work difficulty, improves production efficiency, can ensure that the correction amount is controllable, is suitable for correcting the blade crown parts of various blades, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a blade crown correction machine, including a base frame, two pressure pieces are fixed on the base frame by screws and nuts, the bottoms of the two pressure pieces are in contact with the side of the blade root close to the blade, and the end faces of the two pressure pieces are in contact with the blade. The top of the base frame is detachably connected to a support seat by screws, and a hydraulic correction component is movably provided on the support seat.

[0005] Preferably, the base frame includes a bottom plate, side plates are fixedly connected to both sides of the top surface of the bottom plate, a plurality of support bars are fixedly connected to the bottom of the bottom plate, and a positioning groove matching the blade root end is provided on the top surface of the bottom plate.

[0006] Preferably, the top surfaces of the two side panels are provided with a plurality of screw slots matching the screws.

[0007] Preferably, both of the pressing pieces are provided with straight slots, the screw passes through the straight slots and the lower end of the screw passes through the base frame and is connected with a nut, and the upper end of the screw passes through the straight slots and is connected with a nut.

[0008] Preferably, the hydraulic correction component includes a movable plate, the top surface of the movable plate is fixed with an axle seat, the axle seat is rotatably connected to a push rod, and the distal top surface of the push rod is detachably connected to a push block, and the movable plate is located below the push rod and is equipped with a small hydraulic press, and the ejection rod of the small hydraulic press is hinged to the push rod.

[0009] Preferably, the outer side of the ejector rod of the small hydraulic press is engraved with scales along the axial direction, and the scale intervals are 0.5 mm.

[0010] Preferably, the top block is made of cemented carbide and has an HRC greater than 60.

[0011] Preferably, a rubber layer is fixedly attached to one side of the pressing piece that is attached to the blade.

[0012] Preferably, a translation slot is provided on the support seat, and a screw rod passing through the translation slot is fixedly connected to the bottom of the movable plate. The screw rod is located on the bottom side of the support seat and is threadedly connected to a limiting plate. The plane size of the limiting plate is larger than the size of the translation slot. The screw rod is located on the lower side of the limiting plate and is threadedly connected to a locking nut.

[0013] Preferably, a side surface of the limiting plate close to the support seat is provided with circumferentially distributed balls, the balls are embedded in the limiting plate, and the balls fit the support seat.

[0014] Compared with traditional technologies, the beneficial effects produced by the present invention are as follows: the present invention fixes the pressing piece through a screw and a nut, uses the pressing piece to fix the blade, fixes the support seat on one side of the base frame, and provides a movable hydraulic correction component on the support seat. The hydraulic correction component is used to press the blade crown to achieve correction of the blade crown. Any part of the bottom of the blade crown can be corrected, avoiding the places that cannot be corrected by hammering with a copper hammer or a wrench. The use of hydraulic pressing correction reduces labor intensity and work difficulty, improves production efficiency, can ensure that the correction amount is controllable, and is suitable for correcting the blade crown parts of various blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the connection between the base frame and the pressing piece of the present invention;

[0017] Figure 3 Schematic diagram of the pressing piece structure of the present invention;

[0018] Figure 4 It is a structural schematic diagram of the hydraulic correction component of the present invention;

[0019] Figure 5 This is a schematic diagram of the support base and movable plate structure of the present invention;

[0020] Figure 6 This is a schematic diagram of the connection between the support base and the movable plate of the present invention;

[0021] Figure 7 Schematic diagram of the limiting plate of the present invention.

[0022] In the figure: 1. Base frame; 11. Bottom plate; 12. Side plate; 13. Support bar; 14. Positioning slot; 15. Screw slot; 16. Handle 1; 2. Screw; 3. Nut; 4. Pressing piece; 41. Straight slot; 5. Screw; 6. Support seat; 61. Translation slot; 7. Hydraulic correction component; 71. Moving plate; 72. Axle seat; 73. Push rod; 74. Push block; 75. Small hydraulic press; 76. Handle 2; 77. Screw; 78. Limit plate; 79. Ball; 710. Locking nut. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1-4As shown, a blade crown correction machine is provided, including a base frame 1, on which two pressing pieces 4 are fixed by screws 2 and nuts 3, the bottoms of the two pressing pieces 4 are in contact with the side of the blade root close to the blade, the end faces of the two pressing pieces 4 are in contact with the blade, and the ends of the pressing pieces away from the blade are connected to the base frame through a pad, the top surface of the pad is flush with the top surface of the blade root, and the pad height is adjustable, and can be adjusted according to the height of blade roots of different heights. At the same time, the pad is detachably connected to the base frame, and the top of the base frame 1 is detachably connected to a support seat 6 by screws 5, and the support seat 6 A hydraulic correction component 7 is provided on the movable part. The whole structure of the blade is placed on the base frame 1, and the blade root is pressed down by the pressure piece 4, and the side wall of the blade is pressurized at the same time, so as to fix the whole structure of the blade. The hydraulic correction component 7 is used to press the blade crown to realize the correction of the blade crown. It can realize the correction of any part of the blade crown, avoiding the places that cannot be corrected by the copper hammer or the wrench. The hydraulic top pressure correction reduces the labor intensity and work difficulty, improves the production efficiency, can ensure the controllable correction amount, and is suitable for correcting the blade crown parts of various blades.

[0025] like Figure 2 As shown, in this example, the base frame 1 includes a bottom plate 11, and side plates 12 are fixedly connected to both sides of the top surface of the bottom plate 11. A plurality of support bars 13 are fixedly connected to the bottom of the bottom plate 11. The top surface of the bottom plate 11 is provided with a positioning groove 14 matching the blade root end. The support seat 6 is installed at the same end of the top surface of the two side plates 12, and a plurality of screw grooves 15 matching the screws 5 are provided on the top surfaces of the two side plates 12. The support seat 6 can be adjusted and fixed according to the part of the blade crown to be corrected, and a handle 16 is fixedly connected to the outside of the side plate 12.

[0026] like Figure 2-3 As shown, in this example, a straight slot 41 is provided on each of the two pressing pieces 4, the screw 2 passes through the straight slot 41 and the lower end of the screw 2 passes through the base frame 1 and is connected to a nut 3, the upper end of the screw 2 passes through the straight slot 41 and is connected to a nut 3, and the screw 2 passes through the straight slot 41 to adjust the distance between the pressing pieces 4 to adapt to blades of different thicknesses, and in order to prevent the pressing pieces 4 from scratching the blades, a rubber layer is fixedly bonded to one side of the two pressing pieces 4 that are in contact with the blades. The rubber layer is bonded to the blades to protect the blades, and a rubber layer can also be fixed to the side of the pressing piece 4 that is in contact with the blade root to protect the blade root.

[0027] like Figure 4As shown, in this example, the hydraulic correction component 7 includes a movable plate 71, the top surface of the movable plate 71 is fixed with a shaft seat 72, the shaft seat 72 is rotatably connected to a push rod 73, and the distal end of the push rod 73 is detachably connected to a push block 74, the push block 74 is provided on the top surface or bottom surface of the push rod 73. In this example, the push block 74 is provided on the top surface of the end of the push rod 73, and the push block 74 is threadedly connected to the push rod 73 for easy disassembly. The push block 74 can also be made into a molded block that fits the casting according to the shape of the casting, so that the leaf crown can be quickly corrected. The push block 74 is hard The movable plate 71 is made of high quality alloy and HRC is greater than 60. A small hydraulic press 75 is installed below the push rod 73. The ejector rod of the small hydraulic press 75 is hinged to the push rod 73, which can realize the correction of any part of the blade crown, avoiding the places that cannot be corrected by hammering or wrench. The outer side of the ejector rod of the small hydraulic press 75 is engraved with scales along the axial direction, and the scale interval is 0.5mm, which can ensure that the correction amount is controllable and is suitable for correcting the blade crown parts of various blades. A handle 2 76 is fixed on the top surface of the movable plate 71 to facilitate the shifting of the movable plate 71.

[0028] like Figure 5-7 As shown, a translation slot 61 is provided on the support seat 6, and a screw rod 77 passing through the translation slot 61 is fixedly connected to the bottom of the movable plate 71. The screw rod 77 is located on the bottom side of the support seat 6 and is threadedly connected to a limiting plate 78. The plane size of the limiting plate 78 is larger than the size of the translation slot 61, and in order to facilitate the movable plate 71 to slide on the support seat 6, a circumferentially distributed ball 79 is provided on the side of the limiting plate 78 close to the support seat 6. The ball 79 is embedded in the limiting plate 78, and the ball 79 fits with the support seat 6. When the translation plate moves on the support seat 6, it can be ensured that the translation plate will not move vertically with the support seat 6, and a locking nut 710 is threadedly connected to the lower side of the screw rod 77 on the limiting plate 78 to prevent the limiting plate 78 from slipping.

[0029] The working principle of the present invention is: the blade root of the blade that needs to be corrected is placed on the base frame 1, with the blade crown facing upward, and the pressure piece 4 presses the blade root and uses the screw 2 and the nut 3 to fix the pressure piece 4, so as to achieve the fixation of the blade. According to the position where the blade crown needs to be corrected, the support seat 6 is fixed on the corresponding side of the base frame 1, the hydraulic correction component 7 is placed on the support seat 6, and the blade crown is pressed by hydraulic pressure to achieve the correction of the blade crown part. Any part of the blade crown can be corrected, avoiding the places that cannot be corrected by the copper hammer or the wrench. The use of hydraulic pressure correction reduces labor intensity and work difficulty, improves production efficiency, can ensure that the correction amount is controllable, and is suitable for correcting the blade crown parts of various blades.

[0030] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A blade crown correction machine, comprising a base frame, characterized in that: The top of the base frame is fixed with two pressure pieces by screws and nuts, and the top of the base frame is detachably connected to the support seat by screws, and a hydraulic correction component is movably provided on the support seat. The base frame includes a bottom plate, and side plates are fixedly connected on both sides of the top surface of the bottom plate. A plurality of support bars are fixedly connected to the bottom of the bottom plate. The top surface of the bottom plate is provided with a positioning groove matching the blade root end. Straight notches are opened on the two pressure pieces, and the screw passes through the straight notch and the lower end of the screw passes through the base frame and is connected to the nut, and the upper end of the screw passes through the straight notch and is connected to the nut. The hydraulic correction component includes a movable plate. The top surface of the movable plate is fixed with an axle seat, and a push rod is rotatably connected to the axle seat, and the top surface of the distal end of the push rod is detachably connected to a push block. The movable plate is located below the push rod and a small hydraulic press is installed. The ejection rod of the small hydraulic press is hinged to the push rod. The top surfaces of the two side plates are provided with a plurality of screw grooves matching the screws. A translation slot is provided on the support seat, and a screw rod passing through the translation slot is fixedly connected to the bottom of the movable plate. The screw rod is located on the bottom side of the support seat and is threadedly connected to a limiting disk. The plane size of the limiting disk is larger than the size of the translation slot. The screw rod is located on the lower side of the limit disk and is threadedly connected to a locking nut.

2. The blade crown correction machine according to claim 1, characterized in that: The outer side of the ejector rod of the small hydraulic press is engraved with scales along the axial direction, and the scale intervals are 0.5 mm.

3. The blade crown correction machine according to claim 1, characterized in that: The top block is made of cemented carbide and has an HRC greater than 60.

4. The blade crown correction machine according to claim 1, characterized in that: A side surface of the limiting plate close to the support seat is provided with balls distributed in a circumference, and the balls are embedded in the limiting plate, and the balls are fitted with the support seat.

5. The blade crown correction machine according to claim 1, characterized in that: The side surfaces of the two pressing pieces are both fixedly bonded with a rubber layer.

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