Method of using a multi-directional die forging process forming die for a balanced elbow forging

Abstract

The application relates to the field of closed multi-directional die forging, in particular to a use method of a multi-directional die forging process forming die for a balanced elbow forging. An upper shaft type cavity is arranged on one side of the bottom surface of an upper die core, a lower shaft type cavity is arranged in the middle of the top surface of a lower die core, an upper inclined rib type cavity is arranged on the bottom of the upper die core, a lower inclined rib type cavity is arranged on the top of the lower die core, the upper inclined rib type cavity and the lower inclined rib type cavity form a complete inclined rib type cavity when the die is closed, the two ends of the inclined rib type cavity are communicated with the lower shaft type cavity and the upper shaft type cavity respectively, a through cavity is arranged between the top of the upper die core and the side of the upper inclined rib type cavity away from the upper shaft type cavity, an upper punch is slidably connected in the through cavity, a slide way communicated with the inclined rib type cavity is arranged on the bottom of the upper die core and the top of the lower die core and close to the side of the upper shaft type cavity, and a horizontal punch is slidably connected in the slide way. The forging has full-size precision, reasonable deformation and perfect metal flow lines, the forging forming quality is excellent, the comprehensive performance is excellent, and the service life of the balanced elbow is prolonged.

Description

Technical Field

[0001] This invention relates to the field of closed multi-directional forging, specifically a method for using a multi-directional forging die for balancing elbow forgings. Background Technology

[0002] The titanium alloy balance elbow has a Z-shaped integral structure, consisting of two horizontally misaligned shafts connected by inclined ribs. Currently, it is formed using free forging or die forging processes. However, due to its special structural form, the diameters and lengths of the two horizontal shafts are not equal. The free forging process requires pre-forming a blank to pre-form one side of the horizontal shaft, and then using free forging to form the other side of the shaft and the inclined ribs. The inclined ribs include an inclined section in the middle and horizontal sections on both sides. The process is cumbersome and the forming dimensions are not accurate. The ordinary die forging process forms the balance elbow forging in a Z-shape horizontally, and the blank is a Z-shaped square plate blank that approximates the shape of the forging.

[0003] The prior art CN202010968717.0 discloses a mold for forging a balance elbow and a method for forging a balance elbow, including: an upper mold, the upper mold forming a first mold cavity; and a lower mold, the lower mold forming a second mold cavity; wherein the first mold cavity and the second mold cavity are combined to form a Z-shaped mold cavity. In the prior art, the balance elbow is forged as a whole by designing a Z-shaped mold cavity. However, it only uses upper and lower molds for forming. During the forming process of the whole forging, the metal flow is small and the deformation is not large. Combined with the actual stress of the balance elbow, the stress is easily concentrated at the intersection of the horizontal axis and the inclined plate during its use. This makes it impossible for the current forming process to meet the required service life. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned problems, thereby providing a method for using a multi-directional die forming mold for balancing elbow forgings to improve the overall performance of forgings.

[0005] The technical solution adopted by the present invention to solve the aforementioned problem is as follows:

[0006] A multi-directional forging die for a balanced elbow forging includes an upper die core and a lower die core. An upper shaft cavity is formed on one side of the bottom surface of the upper die core, and a lower shaft cavity is formed in the middle of the top surface of the lower die core. An upper inclined rib cavity is formed at the bottom of the upper die core, and a lower inclined rib cavity is formed at the top of the lower die core. When the die is closed, the upper and lower inclined rib cavities form a complete inclined rib cavity. The two ends of the inclined rib cavity are respectively connected to the lower shaft cavity and the upper shaft cavity. A through cavity is provided between the top of the upper die core and the side of the upper inclined rib cavity away from the upper shaft cavity. An upper punch is slidably connected in the through cavity. A slide is formed on the bottom of the upper die core and the top of the lower die core, near the upper shaft cavity, and connected to the inclined rib cavity. A horizontal punch is slidably connected in the slide.

[0007] A method for using a multi-directional forging die for a balanced elbow forging as described above includes the following steps:

[0008] S1: Prepare the billet. The billet material is alloy steel or titanium alloy. The billet is a whole cuboid and the same width as the upper punch. One side of the bottom surface of the billet is provided with an inclined surface with the same angle as the inclined section of the lower inclined rib cavity.

[0009] S2: Heat the billet according to the forging heating curve of the corresponding material, and place the billet on the lower die core after heating and holding. The billet is stuck in the lower inclined rib cavity through the bottom inclined surface and the side end face and is opposite to the through cavity.

[0010] S3: Control the upper mold core to move downwards until it closes with the lower mold core, and the top of the blank is located in the through cavity.

[0011] S4: The upper punch presses downwards to the bottom of the cavity, and the billet deforms along the inclined rib cavity, the upper shaft cavity, the lower shaft cavity and the slide.

[0012] S5: The horizontal punch presses the billet towards the inclined rib cavity side in the slide, so that the billet is finally formed into a forging.

[0013] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art:

[0014] The integral forming process is free from defects such as folding, the forging is accurate in all dimensions, has a reasonable amount of deformation and perfect metal flow lines, the forging quality is excellent, the overall performance is superior, and the service life of the balance elbow is improved.

[0015] As a preferred embodiment, a further technical solution of the present invention is:

[0016] The bottom surface of the upper punch, near the upper shaft cavity, has an inclined surface that matches the inclined section of the upper inclined rib cavity.

[0017] The slide is at the same height as the adjacent horizontal section of the inclined rib cavity.

[0018] The edges of the blank are all rounded. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure when the blank is placed according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure during the forging process according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the forging in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the main structure of the blank in an embodiment of the present invention;

[0023] Figure 5 This is a top view of the blank structure according to an embodiment of the present invention;

[0024] The markings in the diagram are: upper die core 1, upper shaft cavity 11, upper inclined rib cavity 12, lower die core 2, lower shaft cavity 21, lower inclined rib cavity 22, upper punch 3, horizontal punch 4, billet 5, forging 6. Implementation

[0025] The present invention will be further described below with reference to embodiments, which are intended only to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0026] A multi-directional forging die for a balanced elbow forging includes an upper die core 1 and a lower die core 2. An upper shaft cavity 11 is formed on one side of the bottom surface of the upper die core 1, and a lower shaft cavity 21 is formed in the middle of the top surface of the lower die core 2. The upper shaft cavity 11 and the lower shaft cavity are parallel 21. An upper inclined rib cavity 12 is formed at the bottom of the upper die core 1, and a lower inclined rib cavity 22 is formed at the top of the lower die core 2. When the die is closed, the upper inclined rib cavity 12 and the lower inclined rib cavity 22 form a complete inclined rib cavity. The two ends of the inclined rib cavity are connected to the lower shaft cavity 21 and the upper shaft cavity 11, respectively. A through cavity is provided between the top of the upper die core 1 and the side of the upper inclined rib cavity 12 away from the upper shaft cavity 11. An upper punch 3 is slidably connected in the through cavity. A slide is formed on the bottom of the upper die core 1 and the top of the lower die core 2, near the upper shaft cavity 11, which is connected to the inclined rib cavity. A horizontal punch 4 is slidably connected in the slide.

[0027] A method for using a multi-directional forging die for a balanced elbow forging as described above includes the following steps:

[0028] S1: Prepare blank 5. Blank 5 is made of alloy steel or titanium alloy. Blank 5 is rectangular and has the same width as the upper punch 3. One side of the bottom surface of blank 5 is provided with an inclined surface with the same angle as the inclined section of the lower inclined rib cavity 22.

[0029] S2: Heat the billet 5 according to the forging heating curve of the corresponding material, and place the billet 5 on the lower die core 2 after heating and holding. The billet 5 is stuck in the lower inclined rib cavity 22 through the bottom inclined surface and the side end face and is opposite to the through cavity.

[0030] S3: Control the upper mold core 1 to move downwards until it closes with the lower mold core 2, and the top of the blank 5 is located in the through cavity.

[0031] S4: The upper punch 3 presses downward to the bottom of the cavity, and the billet 5 deforms along the inclined rib cavity, the upper shaft cavity 11, the lower shaft cavity 21 and the slide.

[0032] S5: The horizontal punch 4 extrudes the billet 5 into the inclined rib cavity side in the slide, so that the billet 5 is finally formed into the forging 6.

[0033] The bottom surface of the upper punch 3 is inclined on one side near the upper shaft cavity 11, which is adapted to the inclined section of the upper inclined rib cavity 12. One side of the bottom surface of the upper punch 3 is an inclined surface, and the other side is a flat surface. The length of the inclined surface of the bottom surface of the upper punch 3 is equal to the length of the inclined section of the designed inclined rib plate. When the upper punch 3 is pressed down, it ensures that the extrusion surface of the forging is consistent with the design.

[0034] The slide is at the same height as the adjacent horizontal section of the inclined rib cavity.

[0035] The perimeter of the billet 5 is rounded, with rounded corners of R8 and R35 respectively. The rounded corners can be used to prevent the billet from cracking during the forging process. At the same time, according to the design requirements of the forging, the rounded corners of the two vertical sides of the billet away from the upper shaft cavity are R35, which is larger than the other rounded corners, and are used for the placement of the billet and the forming of the forging.

[0036] The integral forming process is free from defects such as folding, the forging is accurate in all dimensions, has a reasonable amount of deformation and perfect metal flow lines, the forging quality is excellent, the overall performance is superior, and the service life of the balance elbow is improved.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A method for using a multi-directional die forging forming mold for a balanced elbow forging, characterized in that: The multi-directional forging die for balanced elbow forgings includes an upper die core and a lower die core. An upper shaft cavity is formed on one side of the bottom surface of the upper die core, and a lower shaft cavity is formed in the middle of the top surface of the lower die core. An upper inclined rib cavity is formed at the bottom of the upper die core, and a lower inclined rib cavity is formed at the top of the lower die core. When the die is closed, the upper and lower inclined rib cavities form a complete inclined rib cavity. The two ends of the inclined rib cavity are connected to the lower shaft cavity and the upper shaft cavity, respectively. A through cavity is provided between the top of the upper die core and the side of the upper inclined rib cavity away from the upper shaft cavity. An upper punch is slidably connected in the through cavity. A slide is formed on the bottom of the upper die core and the top of the lower die core, near the upper shaft cavity, and connected to the inclined rib cavity. A horizontal punch is slidably connected in the slide. The bottom surface of the upper punch near the upper shaft cavity is an inclined surface adapted to the inclined section of the upper inclined rib cavity. The slide is at the same height as the horizontal section of the adjacent inclined rib cavity. The usage method includes the following steps: S1: Prepare the blank. The blank material is alloy steel or titanium alloy. The blank is rectangular and the same width as the upper punch. One side of the bottom surface of the blank is provided with a slope with the same angle as the inclined section of the lower inclined rib cavity. S2: Heat the billet according to the forging heating curve of the corresponding material, and place the billet on the lower die core after heating and holding. The billet is stuck in the lower inclined rib cavity through the bottom inclined surface and the side end face and is opposite to the through cavity. S3: Control the upper mold core to move downwards until it closes with the lower mold core, with the top of the blank located in the through cavity; S4: The upper punch presses downwards to the bottom of the cavity, and the billet deforms along the inclined rib cavity, the upper shaft cavity, the lower shaft cavity and the slide; S5: The horizontal punch presses the billet towards the inclined rib cavity side in the slide, so that the billet is finally formed into a forging.

2. The method of using the multi-directional forging die for the balanced elbow forging as described in claim 1, characterized in that: The edges of the blank are all rounded.

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