Gear box hanging seat forge piece sealing die

Abstract

The utility model discloses a gear box hanging seat forge piece sealing die, and belongs to the technical field of machinery. The closed mold comprises an upper closed mold body and a lower closed mold body, the upper closed mold body can be combined with the lower closed mold body, the upper closed mold body is a square block, the top of the upper closed mold body is a square plane, the bottom of the upper closed mold body is a step plane, and an arc-shaped face is arranged between the upper plane and the lower plane of the step. The closed die lower die is also a square block body, the size of the closed die lower die is larger than that of the closed die upper die, a cavity is formed in the closed die lower die, the cavity is communicated with the bottom of the closed die lower die, and a rectangular opening is formed in the cavity; the cavity body of the cavity is of a structure with a wide upper part and a narrow lower part; and the inner side wall of the cavity in the lower mold of the closed mold has inclination. The closed die is simple and convenient to assemble and high in degree of freedom, a forge piece is easy to strip from the die, the hot working production efficiency is improved, the feeding weight is greatly reduced by using the closed die, and the raw material cost is reduced.

Description

Technical Field

[0001] The utility model relates to a gear box hanger forging closed die, belonging to the technical field of machinery. Background Art

[0002] With the rapid development of high-speed rail and subway industries, in order to ensure the processability and stability of bogie welding, bogie welding parts are constantly being optimized, resulting in a large number of welded forgings with special shapes. It is difficult to ensure the drawing size of the gearbox hanger blank by free forging, which is inefficient and costly. The blank forged by free forging has heavy feed and large cutting volume. The characteristics of railway products are large batches and complex shapes. The forging processing cycle of this forging scheme is long, which affects the processing efficiency. The original forging scheme of the gearbox hanger product is based on the maximum outer contour inclusion body of the part, with a processing allowance of 7 to 8 mm extended outward, a large process excess filling, and heavy feed. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a gear box hanger forging closed die, which can effectively reduce the feed weight, improve the forging finished product rate, improve the production efficiency of forging and machining, and is suitable for mass production.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a closed die for a gear box hanger forging, comprising a closed die upper die and a closed die lower die, the closed die upper die can be combined with the closed die lower die, the closed die upper die is a square block, the top of the closed die upper die is a square plane, the bottom of the closed die upper die is a step plane, and an arc surface is provided between the upper and lower planes of the step; the closed die lower die is also a square block, the size of the closed die lower die is larger than that of the closed die upper die, a cavity is provided in the closed die lower die, the cavity is communicated with the bottom of the closed die lower die and is provided with a strip-shaped rectangular hole; the cavity body of the cavity is a structural form of being wide at the top and narrow at the bottom, and the inner side wall of the cavity inside the closed die lower die has an inclination.

[0005] The beneficial effects of the utility model are as follows: the utility model is easy to assemble, has a high degree of freedom, is easy to demould for forgings, and improves the hot processing production efficiency; the use of this closed die greatly reduces the weight of the material input and reduces the cost of raw materials; the use of this closed die reduces the cutting amount of forging machining and improves the machining production efficiency; the closed die is suitable for the structural processing of large quantities of railway workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0007] Figure 1 It is a structural schematic diagram of the utility model.

[0008] Figure 2It is a schematic diagram of the upper mold of the closed mold of the utility model.

[0009] Figure 3 It is a schematic diagram of the lower mold of the closed mold of the utility model.

[0010] Figure 4 yes Figure 3 Bottom diagram of .

[0011] Figure 5 It is a schematic diagram of the combination of the closed mold upper mold and the closed mold lower mold of the utility model.

[0012] Figure 6 This is a schematic diagram of the original design of the gearbox hanger forging.

[0013] Numbers in the figure:

[0014] 1. Closed die upper die, 2. Forging, 3. Closed die lower die, 4. Cavity, 5. Rectangular hole, 6. Slope. DETAILED DESCRIPTION

[0015] like Figure 1 As shown in FIG. 6 , a closed die for a gearbox hanger forging comprises a closed die upper die 1 and a closed die lower die 3, wherein the closed die upper die 1 can be combined with the closed die lower die 3, the closed die upper die 1 is a square block, the top of the closed die upper die 1 is a square plane, the bottom of the closed die upper die 1 is a step plane, and an arc surface is provided between the upper and lower planes of the step; the closed die lower die 3 is also a square block, the size of the closed die lower die 3 is larger than the size of the closed die upper die 1, a cavity 4 is provided in the closed die lower die 3, the cavity 4 is communicated with the bottom of the closed die lower die 3 and is provided with a strip-shaped rectangular hole 5; the cavity 4 has a structure in which the upper width is wide and the lower width is narrow, and the inner wall of the cavity 4 inside the closed die lower die 3 has a slope 6.

[0016] During use, the closed die upper die 1 serves as the contact part with the upper hammer anvil, and is used to transmit the striking force and serve as a control component of the forging shape. The forging 2 is a piece formed by forging the blank in the upper and lower die cavities. The closed die lower die 3 serves as the main control part of the lower forming shape of the forging 2, and is used to accommodate the blank. At the same time, it serves as a guide sleeve of the closed die upper die 1 to ensure that the closed die upper die 1 moves vertically downward in the cavity 4. After the blank of the forging 2 enters the cavity 4, the closed die upper die 1 strikes the blank to form it, and the bottom of the forging 2 will be filled with the rectangular hole 5; when taking out the forging 2, the rectangular hole 5 is placed upward, and a pressing block is placed above the filled part of the forging 2 in the rectangular hole 5, and the forging 2 is ejected by the pressing block and the hammering device, and the slope 6 facilitates the removal of the forging 2.

[0017] The utility model adds process materials locally according to the shape characteristics of the forging 2, selects the plane with the largest horizontal projection area of ​​the forging 2 as the parting surface of the forging 2, manufactures corresponding molds according to the shapes of the forging 2 on both sides of the parting surface, and selects reasonable fillets and draft angles; when working, on the basis of ensuring the size of the forging, the material weight is greatly reduced, the cost is reduced, and the production and processing efficiency is improved.

[0018] The purpose of the utility model is to reduce the weight of the material under the premise of ensuring the machinability of the forging 2. According to the structural characteristics of the product, the position of the parting surface of the forging 2 is analyzed. After filling with appropriate process surplus materials, the parting surface is used as a reference to perform closed mold splitting processing on both sides. The closed mold lower mold 3 also serves as a guide sleeve. The closed mold upper mold 1 moves in the closed mold lower mold 3 to strike the blank to form, and the structure of some parts is simplified according to the metal flow characteristics to facilitate demoulding. In this way, the weight of the forging 2 after the redesign is only 50% of the weight of the original solution, which greatly shortens the processing time and improves the work efficiency. It is fully capable of processing a workpiece that meets the requirements of the drawings and technical conditions, and the processing efficiency can be improved by 2 to 3 times.

Claims

1. A closed die for a gearbox hanger forging, characterized in that: The invention comprises a closed mold upper mold (1) and a closed mold lower mold (3), wherein the closed mold upper mold (1) can be combined with the closed mold lower mold (3), the closed mold upper mold (1) is a square block, the top of the closed mold upper mold (1) is a square plane, the bottom of the closed mold upper mold (1) is a step plane, and an arc surface is provided between the upper and lower planes of the step; the closed mold lower mold (3) is also a square block, the size of the closed mold lower mold (3) is larger than the size of the closed mold upper mold (1), and a cavity (4) is provided in the closed mold lower mold (3), the cavity (4) is communicated with the bottom of the closed mold lower mold (3) and is provided with a strip-shaped rectangular hole (5).

2. The gearbox hanger forging closed die according to claim 1, characterized in that: The cavity (4) has a structure in which the cavity is wide at the top and narrow at the bottom, and the inner side wall of the cavity (4) inside the lower mold (3) of the closed mold has a slope (6).

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