Blade one-forging two-die forging forming die

Abstract

The utility model discloses a blade one-forging two-die forging forming die which comprises an upper forging die and a lower forging die which are vertically matched with each other, and assembling key grooves are formed in the upper end face of the upper forging die and the lower end face of the lower forging die. An upper forging impression and a lower forging impression which correspond to each other in the vertical direction are arranged in the middle of the lower end face of the upper forging die and in the middle of the upper end face of the lower forging die respectively, a flash bridge opening is formed in the periphery of the upper forging impression, and flash bins are arranged on the periphery of the lower forging impression and the periphery of the flash bridge opening. Impression detection sample plate holes corresponding to each other up and down are formed in the upper and lower flash bins; concave lock catches are arranged at four corners of the lower end face of the upper forging die, and convex lock catches are arranged at positions, corresponding to the concave lock catches, of the upper end face of the lower forging die. Forward and reverse integral forging forming is achieved, the problem of horizontal component force during single piece forging is effectively solved, production efficiency can be effectively improved, forgings with high precision can be produced under the condition that the precision of a forging hammer is poor due to the rectangular design of the guide lock catch, and the die is convenient to install and position.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a blade one-forging and two-die forging mold. Background Art

[0002] Blades are one of the core parts of steam turbines. The performance and efficiency of steam turbines mainly depend on the design and processing level of blade profiles. The difficulty in machining steam turbine blades lies in the fact that most of them are made of various stainless steels and their profiles are complex free-form surfaces. With the development of forging technology, almost all materials can be forged, especially complex surfaces.

[0003] Die forging is the main forming process for blade manufacturing. However, in the prior art, due to the complex shape of the blade and the distortion of the profile, there is a horizontal force component in each die forging, which causes the blade to be misaligned and affects the quality of the forging. Utility Model Content

[0004] The utility model aims to provide a blade one-forging two-die forging die to solve the above-mentioned problem.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The utility model discloses a blade one-forging two-die forging forming die, comprising an upper forging die and a lower forging die which cooperate with each other from top to bottom, an upper end face of the upper forging die and a lower end face of the lower forging die are both provided with assembly keyways, and after key blocks are inserted into the assembly keyways, the upper forging die and the lower forging die are restricted from moving forward and backward, an upper forging die chamber and a lower forging die chamber corresponding to upper and lower positions are respectively provided at a center position of the lower end face of the upper forging die and a center position of the upper end face of the lower forging die, a flash bridge opening is provided around the upper forging die chamber, and flash bins are provided around the lower forging die chamber and the flash bridge opening, and die chamber detection template holes corresponding to upper and lower positions are opened in the upper and lower flash bins; concave locking buckles are provided on the four corners of the lower end face of the upper forging die, and convex locking buckles are provided at positions of the upper end face of the lower forging die corresponding to the concave locking buckles.

[0007] Furthermore, the upper forging die and the lower forging die are both rectangular.

[0008] Furthermore, an upper forging die dovetail is provided at a left-right center position of the upper end surface of the upper forging die in the front-to-back direction, and the assembly keyway is provided at a right middle position of the upper forging die dovetail.

[0009] Furthermore, a lower forging die dovetail is provided at a left-right center position of the lower end surface of the lower forging die in the front-to-back direction, and the assembly keyway is provided at a right middle position of the lower forging die dovetail.

[0010] Furthermore, the flash bin is a curved surface.

[0011] Furthermore, a blank positioning groove is provided on the lower forging die bore.

[0012] Furthermore, a resistance platform is provided at the blade crown end in the length direction in the flash bin around the lower forging die bore.

[0013] Furthermore, a first lifting hole is provided at a central position on the front end face and the rear end face of the upper forging die and the lower forging die, and two second lifting holes are provided on the left end face and the right end face of the upper forging die and the lower forging die.

[0014] Compared with the prior art, the beneficial technical effects of the utility model are:

[0015] The utility model has a novel structure. The forgings are irregular curved surface forgings. The positive and reverse forgings are formed in one piece, which effectively solves the problem of horizontal force component that cannot be avoided during single-piece forging and can effectively improve production efficiency. The guide lock adopts a rectangular design, which can produce forgings with higher precision under the condition of poor forging hammer precision, and is convenient for mold installation and positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a three-dimensional view of the one-forging and two-die forging die of the blade of the utility model from the upper right angle of the front side;

[0018] Figure 2 It is a stereoscopic view of the one-forging and two-die forging die of the blade of the utility model from the lower right angle of the front side;

[0019] Figure 3 It is a three-dimensional picture of a steam turbine blade forging;

[0020] Explanation of the accompanying reference numerals: 1. upper forging die; 2. lower forging die; 3. assembly keyway; 4. upper forging die bore; 5. lower forging die bore; 6. flash bridge opening; 7. flash bin; 8. die bore detection template hole; 9. concave locking buckle; 10. convex locking buckle; 11. upper forging die dovetail; 12. lower forging die dovetail; 13. blank positioning groove; 14. resistance platform; 15. first lifting hole; 16. second lifting hole. DETAILED DESCRIPTION

[0021] like Figure 1-3 As shown, a blade one-forging two-die forging die comprises an upper forging die 1 and a lower forging die 2 which cooperate with each other, and the upper forging die 1 and the lower forging die 2 are both rectangular bodies.

[0022] An assembly keyway 3 is provided on the upper end surface of the upper forging die 1 and the lower end surface of the lower forging die 2. An upper forging die dovetail 11 is provided at a left-right center position of the upper end surface of the upper forging die 1 along the front-to-back direction. The assembly keyway 3 is arranged at the middle position on the right side of the upper forging die dovetail 11. A lower forging die dovetail 12 is provided at a left-right center position of the lower end surface of the lower forging die 2 along the front-to-back direction. The assembly keyway 3 is arranged at the middle position on the right side of the lower forging die dovetail 12. After a key block is inserted into the assembly keyway 3, the forward and backward movement of the upper forging die 1 and the lower forging die 2 is limited.

[0023] An upper forging die chamber 4 and a lower forging die chamber 5 corresponding to the upper and lower positions are respectively provided at the center position of the lower end surface of the upper forging die 1 and the center position of the upper end surface of the lower forging die 2. A flash bridge opening 6 is provided around the upper forging die chamber 4. A flash bin 7 is provided around the lower forging die chamber 5 and the flash bridge opening 6. The flash bin 7 is a curved surface.

[0024] The upper and lower flash bins 7 are provided with mold bore detection template holes 8 corresponding to the upper and lower positions, so as to facilitate the use of templates to detect the mold bore.

[0025] The four corners of the lower end surface of the upper forging die 1 are provided with concave lock buckles 9, and the upper end surface of the lower forging die 2 is provided with convex lock buckles 10 at positions corresponding to the concave lock buckles 9. The concave lock buckles 9 and the convex lock buckles 10 are both rectangular in design, which have better locking effects than triangular lock buckles, and can produce forgings with higher precision under the condition of poor forging hammer precision, while facilitating the installation and positioning of the die.

[0026] When the lower end surface of the upper forging die 1 fits with the upper end surface of the lower forging die 2 , a gap is left between the flash bridge opening 6 and the flash bin 7 , and a gap is left between the concave lock buckle 9 and the convex lock buckle 10 .

[0027] The lower forging die bore 5 is provided with a blank positioning groove 13 to facilitate blank positioning and placement.

[0028] A resistance platform 14 is provided at the blade crown end in the length direction in the flash bin 7 around the lower forging die bore 5, so that the blade is easier to forge.

[0029] A first lifting hole 15 is provided at the center position on the front end face and the rear end face of the upper forging die 1 and the lower forging die 2, and two second lifting holes 16 are provided on the left end face and the right end face of the upper forging die 1 and the lower forging die 2. The first lifting hole 15 and the second lifting hole 16 are used to facilitate the lifting and turning of the forging die in actual production.

[0030] The utility model adopts one mold and two pieces, and the positive and negative blades are symmetrically designed, which can eliminate horizontal force components and improve the quality of forgings. Moreover, one positive and one negative blade can be produced at a time, which can effectively improve production efficiency.

[0031] The utility model produces turbine blade products with irregular curved surface structure, large (thick) at both ends and small (thin) in the middle, rectangular at both ends and curved in the middle. The split mold is a curved split mold, and the upper and lower die chambers of the forging die are symmetrical in the width direction of the module.

[0032] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A blade one-forging two-die forging die, characterized in that: The invention comprises an upper forging die (1) and a lower forging die (2) which cooperate with each other in the upper and lower directions. The upper end surface of the upper forging die (1) and the lower end surface of the lower forging die (2) are both provided with an assembly keyway (3). After a key block is inserted into the assembly keyway (3), the upper forging die (1) and the lower forging die (2) are restricted from moving forward and backward. The upper forging die cavity (4) and the lower forging die cavity (5) which are in the middle of the lower end surface of the upper forging die (1) and the upper end surface of the lower forging die (2) are respectively provided with an upper forging die cavity (4) and a lower forging die cavity (5) which are in the middle of the lower end surface of the upper forging die (1) and the lower end surface of the lower forging die (2). The upper forging die (1) has a bore (5), a flash bridge opening (6) is arranged around the upper forging die bore (4), and flash bins (7) are arranged around the lower forging die bore (5) and the flash bridge opening (6), and bore detection template holes (8) corresponding to upper and lower positions are opened in the upper and lower flash bins (7); concave lock buckles (9) are arranged on the four corners of the lower end face of the upper forging die (1), and convex lock buckles (10) are arranged at positions corresponding to the concave lock buckles (9) on the upper end face of the lower forging die (2).

2. The blade one-forging two-die forging die according to claim 1, characterized in that: The upper forging die (1) and the lower forging die (2) are both rectangular.

3. The blade one-forging two-die forging die according to claim 1, characterized in that: An upper forging die dovetail (11) is provided at a left-right middle position of the upper end surface of the upper forging die (1) along the front-back direction, and the assembly keyway (3) is provided at a right middle position of the upper forging die dovetail (11).

4. The blade one-forging two-die forging die according to claim 1, characterized in that: A lower forging die dovetail (12) is provided at a left-right middle position of the lower end surface of the lower forging die (2) along the front-back direction, and the assembly keyway (3) is provided at a right middle position of the lower forging die dovetail (12).

5. The blade one-forging two-die forging die according to claim 1, characterized in that: The flash bin (7) is a curved surface.

6. The blade one-forging two-die forging die according to claim 1, characterized in that: The lower forging die bore (5) is provided with a blank positioning groove (13).

7. The blade one-forging two-die forging die according to claim 1, characterized in that: A resistance platform (14) is provided at the blade crown end in the length direction in the flash bin (7) around the lower forging die bore (5).

8. The blade one-forging two-die forging die according to claim 1, characterized in that: A first lifting hole (15) is provided at a central position on the front end face and the rear end face of the upper forging die (1) and the lower forging die (2), and two second lifting holes (16) are provided on the left end face and the right end face of the upper forging die (1) and the lower forging die (2).

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