Hot extrusion outer die

Abstract

The utility model provides a hot extrusion outer die which comprises an upper die, and a first upper die cavity, a conical die cavity and a second upper die cavity are sequentially machined in the center of the upper die from top to bottom. An upper die connecting base is arranged at the bottom end of the upper die, and a first bolt hole is machined in the upper die connecting base. A lower die is detachably installed at the bottom of the upper die, a first lower die cavity and a second lower die cavity are sequentially machined in the lower die from top to bottom, a lower die connecting base is arranged at the top end of the lower die, and a second bolt hole is machined in the lower die connecting base; the upper die connecting base and the lower die connecting base are fixedly connected through a flange bolt. By the adoption of the combined die, hot extrusion die forging middle cylinder products meeting the requirements can be machined and produced, the size precision is high, meanwhile, the service life of the combined die is prolonged, the comprehensive manufacturing cost is greatly reduced, and steel is saved.

Description

Technical Field

[0001] This utility model belongs to the field of hot extrusion mold equipment, and specifically relates to a hot extrusion outer mold. Background Technology

[0002] In the molding process of cylinder parts, hot extrusion molding is usually used. In the extrusion process, an outer mold is required. The heated high-temperature blank is usually placed in the outer mold and then formed by hot extrusion.

[0003] The existing outer mold of the cylinder adopts an integral structure. During the normal high-temperature hot extrusion molding process, the upper part of the mold cavity of the outer mold that is in contact with the cylinder is easily subjected to high-temperature hot extrusion and alternating loads. This part is prone to damage, and long-term use can easily lead to local wear, which in turn affects the dimensional accuracy after molding, increases the defect rate, and makes the overall mold repair difficult. Replacement requires the investment of materials for manufacturing and processing again, which results in high overall manufacturing costs and a long manufacturing cycle. Utility Model Content

[0004] The purpose of this utility model is to provide a hot extrusion outer mold. In addition, the mold adopts a combined split structure of upper and lower parts. The upper outer mold cavity is frequently subjected to high-temperature hot extrusion alternating loads and is a vulnerable part, so it is made of heat-resistant mold steel. The lower outer mold is made of ordinary carbon steel, which reduces material procurement costs. By using this combined mold, it is possible to process and produce hot extrusion forging cylinder products that meet the requirements with high dimensional accuracy. At the same time, the service life of the combined mold is extended, which greatly reduces the overall manufacturing cost and saves steel.

[0005] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: a hot extrusion outer mold includes an upper mold, wherein a first upper mold cavity, a conical mold cavity, and a second upper mold cavity are sequentially machined from top to bottom in the central part of the upper mold; an upper mold connecting seat is provided at the bottom end of the upper mold, and a first bolt hole is machined on the upper mold connecting seat;

[0006] The bottom of the upper mold is detachably mounted with a lower mold. The interior of the lower mold is machined with a first lower mold cavity and a second lower mold cavity from top to bottom. The top of the lower mold is provided with a lower mold connecting seat, and a second bolt hole is machined on the lower mold connecting seat.

[0007] The upper mold connecting seat and the lower mold connecting seat are fixedly connected by flange bolts.

[0008] The upper mold is made of heat-resistant mold steel.

[0009] The lower mold is made of ordinary carbon steel.

[0010] The bottom end of the lower mold is provided with a lower mold mounting base, and the lower mold mounting base is machined with lower mold fixing bolt holes.

[0011] The lower end face of the upper mold is machined with a positioning boss, which cooperates with the positioning groove provided at the top of the lower mold.

[0012] The bottom end of the lower mold is machined with a lower mold positioning boss.

[0013] The present invention has the following beneficial effects:

[0014] 1. In addition, the mold adopts a combined split structure of upper and lower parts. The upper outer mold cavity is frequently subjected to high temperature hot extrusion alternating load, which is a vulnerable part. It is made of heat-resistant mold steel. The lower outer mold is made of ordinary carbon steel, which reduces material procurement costs. By using this combined mold, it is possible to process and produce hot extrusion forging cylinder products that meet the requirements with high dimensional accuracy. At the same time, the service life of the combined mold is extended, which greatly reduces the overall manufacturing cost and saves steel.

[0015] 2. The lower mold mounting base described above, along with the corresponding lower mold fixing bolt holes, facilitates reliable fixing and installation of the lower mold in the future.

[0016] 3. Through the cooperation between the positioning boss and the positioning groove, a reliable positioning and docking combination between the upper mold and the lower mold can be achieved, thereby ensuring the combination accuracy.

[0017] 4. The aforementioned lower mold positioning boss facilitates reliable positioning and installation of the lower mold in the future. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a structural diagram of the mold assembly of this utility model.

[0020] Figure 2 This is a structural diagram of the upper mold of this utility model.

[0021] Figure 3 This is a structural diagram of the lower mold of this utility model.

[0022] In the figure: 1. Upper mold, 2. First upper mold cavity, 3. Upper mold connecting seat, 4. First bolt hole, 5. Conical mold cavity, 6. Second upper mold cavity, 7. Second bolt hole, 8. Lower mold connecting seat, 9. First lower mold cavity, 10. Lower mold, 11. Second lower mold cavity, 12. Lower mold mounting seat, 13. Lower mold fixing bolt hole, 14. Positioning boss, 15. Positioning groove, 16. Lower mold positioning boss. Detailed Implementation

[0023] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0024] like Figure 1-3 As shown, a hot extrusion outer die includes an upper die 1. The upper die 1 has a first upper die cavity 2, a conical die cavity 5, and a second upper die cavity 6 machined sequentially from top to bottom at its central portion. An upper die connecting seat 3 is provided at the bottom of the upper die 1, and a first bolt hole 4 is machined on the upper die connecting seat 3. A lower die 10 is detachably mounted at the bottom of the upper die 1. The lower die 10 has a first lower die cavity 9 and a second lower die cavity 11 machined sequentially from top to bottom inside. A lower die connecting seat 8 is provided at the top of the lower die 10, and a second bolt hole 7 is machined on the lower die connecting seat 8. The upper die connecting seat 3 and the lower die connecting seat 8 are fixedly connected by flange bolts. By using this combined die, it is possible to produce hot extrusion forged cylinder products that meet the requirements, with high dimensional accuracy. At the same time, the service life of the combined die is extended, significantly reducing overall manufacturing costs and saving steel.

[0025] Furthermore, the upper mold 1 is manufactured using heat-resistant mold steel. Because the cavity of the upper mold 1 is frequently subjected to alternating high-temperature thermal extrusion loads, it is a vulnerable part, hence the use of heat-resistant mold steel. This effectively enhances the heat resistance of the upper mold 1, ensures its load-bearing capacity, and effectively extends its service life.

[0026] Furthermore, the lower mold 10 is made of ordinary carbon steel. Because the lower mold 10 primarily bears heavy loads, the lower outer mold is made of ordinary carbon steel to reduce material procurement costs.

[0027] Furthermore, a lower mold mounting base 12 is provided at the bottom end of the lower mold 10, and lower mold fixing bolt holes 13 are machined on the lower mold mounting base 12. The lower mold mounting base 12 and the corresponding lower mold fixing bolt holes 13 facilitate the subsequent reliable fixing and installation of the lower mold 10.

[0028] Furthermore, a positioning boss 14 is machined on the lower end face of the upper mold 1, and the positioning boss 14 cooperates with the positioning groove 15 provided on the top of the lower mold 10. Through the cooperation between the positioning boss 14 and the positioning groove 15, a reliable positioning and docking combination between the upper mold 1 and the lower mold 10 can be achieved, thereby ensuring the combination accuracy.

[0029] Furthermore, a lower mold positioning boss 16 is machined at the bottom end of the lower mold 10. The lower mold positioning boss 16 facilitates the subsequent reliable positioning and installation of the lower mold 10.

[0030] The working process and principle of this utility model:

[0031] By using the aforementioned external mold, in the specific process, the upper mold 1 and the lower mold 10 are reliably combined and fixed together by long bolts, thus connecting them into a whole. Then, the entire lower mold 10 is fixedly installed on the forming surface, and finally the middle cylinder is hot extruded and forged through the mold. When the upper mold 1 is worn after long-term use, it is only necessary to disassemble the upper mold 1 and replace it to ensure the normal use of the mold, effectively reducing the replacement cost.

Claims

1. A hot extrusion outer die, characterized in that, The upper mold (1) includes a first upper mold cavity (2), a conical mold cavity (5) and a second upper mold cavity (6) processed sequentially from top to bottom in the center of the upper mold (1); an upper mold connecting seat (3) is provided at the bottom end of the upper mold (1), and a first bolt hole (4) is processed on the upper mold connecting seat (3). The bottom of the upper mold (1) is detachably equipped with a lower mold (10). The lower mold (10) has a first lower mold cavity (9) and a second lower mold cavity (11) processed from top to bottom. The top of the lower mold (10) is provided with a lower mold connecting seat (8), and a second bolt hole (7) is processed on the lower mold connecting seat (8). The upper mold connecting seat (3) and the lower mold connecting seat (8) are fixedly connected by flange bolts.

2. The hot extrusion outer die according to claim 1, characterized in that: The upper mold (1) is made of heat-resistant mold steel.

3. The hot extrusion outer die according to claim 1, characterized in that: The lower mold (10) is made of ordinary carbon steel.

4. The hot extrusion outer die according to claim 1, characterized in that: The bottom end of the lower mold (10) is provided with a lower mold mounting base (12), and the lower mold mounting base (12) is machined with lower mold fixing bolt holes (13).

5. The hot extrusion outer die according to claim 1, characterized in that: The lower end face of the upper mold (1) is machined with a positioning boss (14), which cooperates with the positioning groove (15) provided at the top of the lower mold (10).

6. The hot extrusion outer die according to claim 5, characterized in that: The bottom end of the lower mold (10) is machined with a lower mold positioning boss (16).

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