Manufacturing method of high-strength bulging combined module

Abstract

The invention relates to a manufacturing method of a high-strength bulging combined module, which is characterized in that the preparation process of a bulging die comprises the following steps of: heating a metal bar to a deformation temperature, upsetting, punching to form a hollow ring blank, heating the hollow ring blank to a forging temperature, and forging the hollow ring blank to form the high-strength bulging combined module. Broaching the hollow ring blank into an annular piece with the outer contour consistent with the contour of the inner ring surface of the to-be-bulged annular forge piece; the annular part is subjected to heat treatment, and the annular part is cut into a plurality of sections with the same specification after the inner and outer ring surfaces of the annular part are machined; the special-shaped ring piece is prepared by adopting a ring rolling, machining and segmenting process, the section of the outer ring surface of the special-shaped ring piece is consistent with the section of the inner ring surface of the ring piece to be bulged, the section of the inner ring surface of the special-shaped ring piece is rectangular, then heat treatment is performed, the inner ring surface and the outer ring surface are slightly machined, and then segmenting is performed. By the adoption of the process, waste of die materials during machining is greatly reduced, and the manufacturing cost of the bulging die is reduced.

Description

Technical Field

[0001] The present invention relates to a manufacturing method of a bulging combined module, and particularly to a manufacturing method of a high-strength bulging combined module. Background Art

[0002] Ring bulging is mainly used in the production process of ring forgings. Its functions are to correct the dimensions of the ring and help the hot-rolled ring release residual stress. For the manufacture of the bulging combined module, direct die forging is usually adopted, and then machining is carried out. The matching effect between the bulging combined modules produced by this process is not good. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for preparing a ring bulging combined module using a process of ring binding + machining and splitting. By adopting this method, the matching property and the strength of the modules can be improved.

[0004] To solve the above technical problem, the manufacturing method of the high-strength bulging combined module of the present invention is characterized by including the following steps:

[0005] Heat the metal bar to the deformation temperature, then upset and punch it to form a hollow ring blank. After heating the hollow ring blank to the forging temperature, expand the hollow ring blank into a ring with an outer contour consistent with the inner ring surface contour of the ring forging to be bulged.

[0006] Perform heat treatment on the ring, carry out machining on its inner and outer ring surfaces, and then cut the ring into multiple segments of the same specification.

[0007] The specific steps are as follows: Step 1: Upsetting. The metal bar cut according to the specifications of the bulging die is heated to the deformation temperature, and then upset on a quick forging machine. Step 2: Punching. The upset cake blank is punched with a punch on the quick forging machine to obtain a hollow ring blank. Step 3: Ring rolling. The hollow ring blank obtained in Step 2 is heated to the deformation temperature and then placed on a horizontal radial-axial ring rolling mill for rolling, so that the hollow ring blank undergoes continuous local deformation of increasing inner diameter, decreasing wall thickness, and increasing outer diameter, and a ring with an outer ring surface section consistent with the inner ring surface section of the high-temperature alloy ring forging to be bulged is obtained. Step 4: Splitting. The obtained ring is machined, and then the ring is cut into multiple segments of the same specification.

[0008] Preferably, the inner ring surface of the ring in Step 3 is rectangular.

[0009] Preferably, the splitting process in Step 4 is as follows: Draw an auxiliary circle concentric with the ring 1 and with a diameter of 100 mm. Then determine 12 equally spaced points on the auxiliary circle. Starting from each equally spaced point, make two cutting lines with an included angle of 30°, and evenly cut the ring into 12 segments of the same specification. The segments are then installed on the bulging machine in cooperation with the ring forging to be bulged for the bulging of the special-shaped ring.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] The manufacturing method of the high-strength bulging combined module of the present invention is prepared by using the process of ring rolling + machining and splitting. By ring rolling, a special-shaped ring with an outer ring surface section consistent with the inner ring surface section of the superalloy ring to be bulged and a rectangular inner ring surface section is prepared. Then, after heat treatment, a small amount of machining is performed on the inner and outer ring surfaces, and then splitting is carried out. Using this process greatly reduces the waste of machining time and die materials and reduces the manufacturing cost of the bulging die. Brief Description of the Drawings

[0012] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0013] Figure 1 It is a schematic diagram of the splitting and forming of the ring-shaped part into a bulging combined module. Specific Embodiments

[0014] To implement the manufacturing method of the high-strength bulging combined module of the present invention, a forging heating furnace, a quick forging machine, and an expanding machine need to be provided. The specific embodiments are as follows:

[0015] Step 1: Upsetting. The metal bar cut according to the specifications of the bulging die is heated to the deformation temperature and then upset on the quick forging machine.

[0016] Step 2: Punching. A central hole is punched in the upset blank on the quick forging machine with a punch to obtain a hollow ring blank.

[0017] Step 3: Ring rolling. The hollow ring blank obtained in Step 2 is heated to the deformation temperature and then rolled on a horizontal radial-axial ring rolling mill to cause continuous local deformation of the inner hole of the hollow ring blank to increase, the wall thickness to decrease, and the outer diameter to increase, obtaining a ring-shaped part with an outer ring surface section consistent with the inner ring surface section of the ring to be bulged and a rectangular inner ring surface.

[0018] Step 4: Splitting. The obtained stainless steel ring-shaped part is split as shown in Figure 1 . The splitting process is as follows: Draw an auxiliary circle concentric with the ring-shaped part and with a diameter of 100 mm. Then, determine 12 equally spaced points on the auxiliary circle. Starting from each equally spaced point, make two cutting lines with an included angle of 30°. The ring-shaped part is evenly split into 12 equally sized segments, and the segments are assembled and installed on the bulging machine together with the ring-shaped forging to be bulged for the bulging of the special-shaped ring part.

Claims

1. A manufacturing method of a high-strength bulging combination module, characterized in that It includes the following steps: Step 1: Upsetting. The metal bar cut according to the specifications of the bulging die is heated to the deformation temperature and then upset on a quick forging machine. Step 2: Punching. A central hole is punched in the upset blank on a quick forging machine with a punch to obtain a hollow ring blank. Step 3: Ring rolling. The hollow ring blank obtained in Step 2 is heated to the deformation temperature and then placed on a horizontal radial-axial ring rolling mill for rolling, so that the hollow ring blank undergoes continuous local deformation of increasing the inner hole, reducing the wall thickness, and increasing the outer diameter, to obtain a ring-shaped part whose outer ring surface section is the same as the inner ring surface section of the to-be-bulged superalloy ring forging. Step 4: Cutting. The obtained ring-shaped part is machined, and then the ring-shaped part is cut into multiple segments of the same specification.

2. The manufacturing method of the high-strength bulging combination module according to claim 1, characterized in that, The inner ring surface of the ring-shaped part described in Step 3 is rectangular.

3. The manufacturing method of the high-strength bulging combination module according to claim 1, characterized in that The process of Step 4 cutting is as follows: Draw an auxiliary circle concentric with the ring-shaped part 1 and with a diameter of 100 mm. Then determine 12 equally divided points on the auxiliary circle. Starting from each equally divided point, make two cutting lines with an included angle of 30°. The ring-shaped part is evenly cut into 12 segments of the same specification, and the segments are fitted and installed on a bulging machine together with the to-be-bulged ring forging for the bulging of the special-shaped ring part.

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