Die structure for secondary forming of aluminum alloy countercurrent wire

Abstract

The utility model belongs to the field of forging forming, and relates to a die structure for secondary forming of an aluminum alloy countercurrent line. The die structure comprises a bin part, a bridge part, a damping convex groove part and a forging die cavity opening part. The bridge part serves as a connecting channel between the bin part and the opening part of the forging die cavity, so that redundant metal materials can conveniently flow into the bin part from the opening part of the forging die cavity; the damping convex groove part is arranged on the bridge part section corresponding to the secondary forming material adding part of the forging die cavity, the damping convex groove part forms a damping necking on the connecting channel, the flow speed of the section of connecting channel is reduced, and therefore more metal materials flow back to the secondary forming material adding part.

Description

Technical Field

[0001] This utility model belongs to the field of forging and is related to a mold structure for secondary forming of aluminum alloy in reverse flow. Background Technology

[0002] Aluminum alloy forgings have a wide range of applications in the aerospace field. Based on the working characteristics of the forgings, aluminum alloys with excellent thermal conductivity are used as raw materials. In order to achieve higher production efficiency, die forging process is adopted. After the forging is formed in one step, it needs to be formed in a second step. If the filling part is a counter-flow material addition part, this part is more difficult to form. Utility Model Content

[0003] This invention provides a mold structure for secondary forming of aluminum alloy in a counter-flow pattern, to ensure that the secondary forming of forgings is qualified.

[0004] Technical solution:

[0005] In one aspect, a mold structure for secondary forming of aluminum alloy reverse flow lines is provided, including: a chamber section, a bridge section, a damping groove section, and a forging mold cavity opening section.

[0006] The bridge section serves as a connecting channel between the storage section and the forging die cavity opening, facilitating the flow of excess metal material from the forging die cavity opening into the storage section. A damping groove is provided in the bridge section corresponding to the secondary forming material feeding part of the forging die cavity. The damping groove forms a damping constriction on the connecting channel, reducing the flow velocity in this section of the connecting channel, thereby allowing more metal material to flow back to the secondary forming material feeding part.

[0007] Furthermore, the damping groove needs to extend to the corner near the feeding position.

[0008] Furthermore, the damping groove is composed of a hemispherical structure and a bridge transition structure. The left side of the damping groove is adjacent to the opening, and the right side is located in the middle of the bridge. The cross-section is a semi-circular frustum.

[0009] Furthermore, the damping groove is welded to the lower mold bridge and can be removed after production.

[0010] Furthermore, the damping grooves are distributed along the mold cavity shape of the secondary forming material feeding area.

[0011] Furthermore, the end parallel to the flow direction should not exceed the longitudinal axis of the forging die's center of gravity, and its length should not be less than twice the length of the required material-adding section.

[0012] Furthermore, the end perpendicular to the flow direction should not exceed the transverse axis of the forging die's center of gravity, and its length should not be less than 1.5 times the width of the required material-adding section.

[0013] Beneficial effects: Compared with conventional mold manufacturing methods, this method uses welding, which can be removed later. This effectively blocks material flow during forging, preventing material leakage and ensuring secondary material addition during forming. Controlling the flow direction during forging improves the forming rate and quality of forgings, and ensures that the dimensions of the forgings meet the drawing requirements. Simultaneously, it reduces mold wear caused by processing, saving energy and reducing production costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a mold structure for secondary forming of aluminum alloy flow lines.

[0015] Figure 2 This is a top view of a mold structure for secondary reverse flow forming of aluminum alloy.

[0016] Figure 3 This is a molding effect diagram of a mold structure for secondary reverse flow forming of aluminum alloy. Detailed Implementation

[0017] This invention provides a mold structure for secondary forming of aluminum alloy reverse flow lines, such as... Figure 1-3 As shown, it includes a chamber section 1, a bridge section 2, a damping groove section 3, and a forging mold cavity opening section 4. The damping groove section 3 includes a hemispherical structure with a circular radius dimension R and a bridge section transition structure with a transition radius dimension r. One end face of the damping groove section 3 is adjacent to the opening section 4, and the other end face is located in the bridge section 2. The cross-section is a semi-circular frustum.

[0018] The damping groove 3 is welded to the lower mold bridge and can be removed after production.

[0019] The damping groove 3 is distributed along the mold cavity shape of the part requiring secondary forming and material addition. The end parallel to the flow direction does not exceed the longitudinal axis of the forging die's center of gravity, and its length is not less than twice the length of the part requiring material addition. The end perpendicular to the flow direction does not exceed the transverse axis of the forging die's center of gravity, and its length is not less than 1.5 times the width of the part requiring material addition.

[0020] The horizontal centerline of the radius R of the damping groove 3 coincides with the bottom line of the lower mold bridge; the distance d between the longitudinal centerline and the opening 4 should be greater than the rounded corner transition distance d0 of the opening, preferably located at 1 / 3 to 1 / 2 of the bridge.

[0021] The radius R of the damping groove 3 should not be greater than the height h of the bridge section. R should preferably be 1 / 2 to 2 / 3 of h.

[0022] In the aforementioned mold structure, the transition radius r of the bridge portion of the damping protrusion 3 should not be greater than the circular radius R, and r is preferably 1 / 2 to 1R.

[0023] Example:

[0024] A forging is made of 2A50 material. The forging has a flat shape with dimensions of 215×215×52mm. The upper right part has a concave depth of 14mm. The secondary forming process adds 5mm of material. A 3t die forging hammer is used for production.

[0025] The forging die is designed with a damping groove as described in this invention. The groove height R is 2mm, the bridge transition radius r is 2mm, and the distance d from the longitudinal centerline to the opening is 4mm. The transverse end is 20mm from the longitudinal axis of the forging die's center of gravity, and the longitudinal end is 40mm from the longitudinal axis of the forging die's center of gravity.

[0026] The mold material is 5CrNiMo; the forging is formed in one heat, and the mold cavity is complete and in good condition, all in accordance with the requirements of the forging drawings.

Claims

1. A mold structure for secondary forming of aluminum alloy counterflow lines, characterized in that, include: The chamber (1), the bridge (2), the damping groove (3), and the forging mold cavity opening (4); The bridge section (2) serves as a connecting channel between the storage section (1) and the forging mold cavity opening section (4), facilitating the flow of excess metal material from the forging mold cavity opening section (4) into the storage section (1). A damping groove section (3) is provided in the bridge section corresponding to the secondary forming material feeding part of the forging mold cavity. The damping groove section (3) forms a damping constriction on the connecting channel, reducing the flow rate of this section of the connecting channel, thereby allowing more metal material to flow back to the secondary forming material feeding part.

2. The mold structure according to claim 1, characterized in that, The damping groove (3) also needs to extend to the corner near the feeding position.

3. The mold structure according to claim 1, characterized in that, The damping groove (3) is composed of a hemispherical structure and a bridge transition structure. The left side of the damping groove (3) is adjacent to the forging mold cavity opening (4), and the right side is located in the bridge (2). The cross section is a semi-circular frustum.

4. The structure according to claim 2, characterized in that, The damping groove (3) is welded to the lower mold bridge and can be removed after production.

5. The structure according to claim 4, characterized in that, The damping groove (3) is distributed along the mold cavity shape of the secondary forming material addition part.

6. The structure according to claim 5, characterized in that, The end parallel to the flow direction should not exceed the longitudinal axis of the forging die's center of gravity, and its length should not be less than twice the length of the required material-adding section.

7. The structure according to claim 5, characterized in that, The end perpendicular to the flow direction shall not exceed the transverse axis of the forging die's center of gravity, and its length shall not be less than 1.5 times the width of the required material-adding section.

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