A forming tool suitable for a dumbbell-shaped high-temperature alloy forging

Abstract

The utility model discloses a kind of dumbbell type high-temperature alloy forge piece forming tool suitable for, adapt to a middle cylinder, the blank of larger diameter at both ends.Forming tool includes stress ring, die core, lower die and gasket;The die core is arranged inside stress ring, lower die is arranged below stress ring, gasket is arranged between lower die and stress ring;Stress ring is used to assemble and constrain die core, exert radial pre-stress to internal die core by interference fit, enhance the overall load capacity of mould, prevent die core from cracking in the process of forging;Die core inside is provided with for the cavity of forge piece forming, cavity is columnar cavity, upper end is provided with the outward opening bevel matched with the dumbbell type forge piece appearance, lower end is provided with horn-like bevel.The utility model can significantly reduce the allowance of forge piece processing, reduce machining, improve product pass rate and production efficiency;Realize two ends in turn upsetting by cooperation operating machine rotation, reduce intermediate tempering frequency;Different sizes of dumbbell type high-temperature alloy forge piece can be adapted by replacing die core, strong universality, effectively reduce mould cost.

Description

Technical Field

[0001] This utility model discloses a forming tooling suitable for dumbbell-shaped high-temperature alloy forgings, belonging to the field of high-temperature alloy forging. Background Technology

[0002] Dumbbell-shaped high-temperature alloy free forgings are challenging to form due to their structural characteristics, including high resistance to high-temperature deformation, significant height difference between the rod and flange ends, and large axial length-to-diameter ratio of the rod. Currently, common processes include free forging with rod elongation and direct machining of the bar stock. Free forging often involves locally elongating the middle rod using a forging tool. This method easily leads to excessive machining allowances, difficulty in controlling the coaxiality of the rod ends, and the risk of surface folding due to improper feed rate or increased cracking tendency due to excessively low final forging temperature. Direct machining, on the other hand, results in high material removal rates and significantly increased production costs due to the large dimensional differences between the rod and head. These technological bottlenecks severely restrict the improvement of product yield and production efficiency. Utility Model Content

[0003] To overcome the above shortcomings, this utility model designs a forming tooling that can not only meet the forming of dumbbell-shaped high-temperature alloy forgings and solve the instability problem during billet forming, but also reduce the machining allowance of forgings, ensure the concentricity of the two ends, improve product qualification rate and production efficiency, and can be applied to the production of dumbbell-shaped high-temperature alloy difficult-to-deform metals of various specifications, reducing mold costs.

[0004] The technical solution of this utility model is as follows: A tooling for forming dumbbell-shaped high-temperature alloy forgings, adapted to a billet with a central cylinder and large diameters at both ends.

[0005] The forming fixture includes a stress ring, a mold core, a lower mold, and a washer; The die core is located inside the stress ring, the lower die is located below the stress ring, and the washer is located between the lower die and the stress ring. The stress ring is used to assemble and constrain the die core. Through interference fit, radial preload stress is applied to the internal die core to enhance the overall load-bearing capacity of the die and prevent the die core from cracking during forging. The mold core has a cavity for forming the forging. The cavity is a columnar cavity with an outwardly opening inclined surface at the upper end that matches the shape of the dumbbell-shaped forging, and a trumpet-shaped inclined surface at the lower end.

[0006] Preferably, the mold core is a replaceable structure, and its cavity size is determined according to the target forging size.

[0007] Preferably, the stress ring, lower mold, and washer are separate structures.

[0008] Preferably, the lower die is a pad structure with a boss, and a rod cavity is opened in the center to constrain the deformation of the rod of the forging during upsetting, and also serves as a demolding punch.

[0009] Preferably, the diameter of the rod cavity of the die core remains unchanged, and the diameter of the rod cavity of the lower die remains unchanged, so as to keep the diameter of the middle rod of the dumbbell-shaped forging unchanged.

[0010] The beneficial effects of this utility model are: 1. Significantly reduces forging allowance, machining allowance, and product qualification rate, thereby improving production efficiency; 2. By changing the die core, it can be used to produce forgings of different sizes, reducing die costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the forming tooling of this utility model; Figure 2 It is a drawing of the billet; Figure 3 This is a schematic diagram of the stress ring structure; Figure 4 This is a schematic diagram of the mold core structure; Figure 5 This is a schematic diagram of the lower mold structure; Figure 6 It is a diagram of the forging process; Figure 7 This is a drawing of the finished forging. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0013] like Figures 1-5 As shown, a tooling suitable for forming dumbbell-shaped high-temperature alloy forgings is adapted to a billet with a central cylinder and large diameters at both ends.

[0014] The forming fixture includes a stress ring 1, a mold core 2, a lower mold 3, and a washer 4; The mold core 2 is located inside the stress ring 1, the lower mold 3 is located below the stress ring 1, and the washer 4 is located between the lower mold 3 and the stress ring 1. The stress ring 1 is used to assemble and constrain the mold core 2. By cooperating, radial pre-stress is applied to the internal mold core 2 to enhance the overall load-bearing capacity of the mold and prevent the mold core 2 from cracking during the forging process. The mold core 2 has a cavity for forging. The cavity is a columnar cavity with an outwardly opening inclined surface at the upper end that matches the shape of the dumbbell-shaped forging, and a trumpet-shaped inclined surface at the lower end.

[0015] Preferably, the mold core 2 is a replaceable structure, and its cavity size is determined according to the size of the target forging.

[0016] Preferably, the stress ring 1, the lower mold 3, and the washer 4 are separate structures.

[0017] Preferably, the lower die 3 is a pad structure with a boss, and a rod cavity is opened in the center to constrain the deformation of the rod of the forging during upsetting, and also serves as a demolding punch.

[0018] Preferably, the diameter of the rod cavity of the mold core 2 remains unchanged, and the diameter of the rod cavity of the lower mold 3 remains unchanged, so as to keep the diameter of the middle rod of the dumbbell-shaped forging unchanged.

[0019] like Figure 6 The diagram shows the forging process. First, place the die core 2 into the stress ring 1, and then place the assembly on the lower die 3 and washer 4. Secure it on the worktable. Place the lower end of the heated billet into the die core 2 and secure it. After securing it, press the hammer down onto the stress ring. Use a manipulator to clamp the stress ring 1 (including the die core 2 and the billet 5) and rotate it 180°. Press the hammer down onto the stress ring again. The billet will then be ejected from the die. The finished forging is shown below. Figure 7 As shown.

[0020] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tooling suitable for forming dumbbell-shaped high-temperature alloy forgings, characterized in that, Includes stress ring (1), mold core (2), lower mold (3) and washer (4); The mold core (2) is located inside the stress ring (1), the lower mold (3) is located below the stress ring (1), and the washer (4) is located between the lower mold (3) and the stress ring (1). The mold core (2) has a cavity for forging. The cavity is a columnar cavity with an outward-opening inclined surface at the upper end that matches the shape of the dumbbell-shaped forging, and a trumpet-shaped inclined surface at the lower end.

2. The forming tooling for dumbbell-shaped high-temperature alloy forgings according to claim 1, characterized in that, The mold core (2) is a replaceable structure, and its cavity size is determined according to the target forging size.

3. The forming tooling for dumbbell-shaped high-temperature alloy forgings according to claim 1, characterized in that, The stress ring (1), lower mold (3) and washer (4) are separate structures.

4. The forming tooling for dumbbell-shaped high-temperature alloy forgings according to claim 1, characterized in that, The lower die (3) is a pad block structure with a boss, and a rod cavity is opened in the center to constrain the deformation of the rod of the forging during upsetting, and also serves as a demolding punch.

5. The forming tooling for dumbbell-shaped high-temperature alloy forgings according to claim 1, characterized in that, The diameter of the rod cavity of the core (2) remains unchanged, and the diameter of the rod cavity of the lower die (3) remains unchanged, in order to keep the diameter of the middle rod of the dumbbell-shaped forging unchanged.

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