CN204449176U - A kind of block forging mould for cross axle Warm Extrusion - Google Patents

Abstract

The utility model discloses a closed forging die used for cross-axis warm extrusion, which belongs to the technical field of warm extrusion. It includes a lower mold base, an upper mold base, a lower ejector rod, and an upper ejector rod. A lower template is installed floatingly on the upper end of the lower mold base. A large spring is arranged between the lower mold base and the lower template. There is a lower die, one side of the lower template is provided with a hook for locking the upper template, and the other side is provided with a guide hole, and a guide post is installed in the guide hole, and the guide post runs through the upper die base and the upper template; The lower end of the mold base is fixed with an upper template by screws, and an upper die is arranged on the upper template. When working, the upper die and the lower die cooperate to form a closed space; Regeneration of flash edges greatly saves costs and improves production efficiency, and the manufactured cross shaft has better surface quality and dimensional accuracy, and has significant economic benefits.

Description

A Closed Forging Die for Cross-axis Warm Extrusion

technical field

The utility model relates to the technical field of warm extrusion, in particular to a closed forging die for cross-axis warm extrusion.

Background technique

With the rapid development of the automobile industry, the demand for automobile cross shafts is also increasing. At present, in the prior art, open die forging is generally used to process the cross shaft, and open die forging will generate burrs, which will increase the manufacturing cost. In mass production, the phenomenon of material waste due to burrs cannot be ignored. Therefore, in view of the shortcomings of open die forging, closed forging has appeared in recent years, and closed forging technology is a precision forging forming technology that has developed rapidly in recent years. The feature of this technology is to close the mold first and then use the punch to extrude the billet in the die cavity. Through the clamping force and extrusion force, the billet is in a three-dimensional compressive stress state with good plasticity, and parts with complex shapes can be formed at one time. . Compared with the traditional open forging process, the production cost is low and the material utilization rate is high. However, the precision of products processed by occlusion forging is average. Therefore, warm extrusion forming technology has emerged. Warm extrusion forming technology is a new plastic forming process developed on the basis of cold extrusion plastic forming in recent years. The warm extrusion forming process has the characteristics of low extrusion stress, easy forming, and little possibility of oxidation and decarburization. It is a high-efficiency, high-quality, and low-consumption precision processing technology. The finished parts have good surface quality and dimensional accuracy.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model combines the advantages of closed forging and warm extrusion forming technologies, and proposes a warm extrusion closed forging die for processing cross shafts.

The utility model is realized through the following technical scheme: a closed forging die for cross-axis warm extrusion, comprising a lower mold base (9), an upper mold base (11), a lower ejector rod (17), an upper ejector rod (10), where:

The upper end of the lower mold base (9) is floatingly provided with a lower template (8), and a large spring (16) is arranged between the lower mold base (9) and the lower template (8). The upper and middle parts of the lower mold base (8) A lower die (15) is provided at the position, a hook (6) for locking the upper template (12) is provided on one side of the lower template (8), and a guide hole is provided on the other side, and a guide post is installed in the guide hole (14), the guide post (14) runs through the upper mold base (11) and the upper template (12).

The lower end of the upper mold base (11) is fixedly provided with an upper template (12) by a screw (4), and the upper template (12) is provided with an upper die (13). During work, the upper die (13) and the lower die Die (15) cooperates, forms airtight space.

Further, the hook (6) is hinged on the lower template (8), and a small spring (7) for assisting the rotation of the hook (6) is provided on the opposite side of the hinge between the hook (6) and the lower template (8).

Further, for the convenience of assembly, a cylindrical pin (5) for positioning is also arranged between the upper template (12) and the upper die (13).

Further, in order to protect the upper formwork (12), cushion blocks (3) are also provided at the parts where the hooks (6) contact with the upper formwork (12).

Further, a pressure plate (2) is also arranged between the upper mold base (11) and the upper template (12).

Further, floating springs are also arranged between the upper ejector rod (10) and the upper template (12), the lower ejector rod (17) and the lower template (8).

Due to the adoption of the above structure, compared with the prior art, the utility model has the following beneficial effects: the mold no longer produces flash during the warm extrusion forging of the cross shaft, which greatly saves the cost and improves the production efficiency, and The manufactured cross shaft has better surface quality and dimensional accuracy, and has remarkable economic benefits.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1, a closed forging die for cross-axis warm extrusion includes a lower mold base 9, an upper mold base 11, a lower ejector pin 17, and an upper ejector pin 10, wherein: the upper end of the lower mold base 9 A lower template 8 is floatingly arranged, and a large spring 16 is arranged between the lower mold base 9 and the lower template 8. On the lower template 8, a lower die 15 is arranged at a middle position, and one side of the lower template 8 is provided with a lock for locking. Hold the hook 6 of the upper template 12, the other side is provided with a guide hole, the guide hole is equipped with a guide post 14, the guide post 14 runs through the upper die base 11 and the upper template 12; the lower end of the upper die base 11 is fixed by screws 4 An upper template 12 is provided, and an upper die 13 is arranged on the upper template 12. During operation, the upper die 13 cooperates with the lower die 15 to form a closed space.

The principle of the working process of the utility model is that the blank is placed in the counterbore of the lower die 15, the blank is positioned naturally by the wall of the cavity, the upper template 12 goes down with the slider of the press, and the guide column 14 of the lower template 8 is introduced into the upper template 12 The upper guide sleeve, the upper die 13 and the lower die 15 are combined to form a closed mold cavity, and the hook 6 turns inward at an angle under the action of the small spring 7, hooks the pad 3, and the upper die 13, the lower die Die 15 is locked. Thereafter, the upper template 12 continues to descend, driving the lower die 13, the lower template 8 and the hook 6 to float downward together, the large spring 16 is compressed, and the lower push rod 17 squeezes the blank in the counterbore into the cavity. When the upper template 12 reaches the bottom dead center, the deformed metal fills the cavity, and the extrusion ends. The upper formwork 12 is lifted, and the hook 6 has not been opened at the initial stage. The lower formwork 8, the lower die 13 and the hook 6 float up with the upper formwork 12. When the tail of the hook 6 is blocked, as the lower formwork 8 continues to float, the hook 6 is lifted. Open, the upper die 13 and the lower die 15 are separated, and the upper template 12 and the lower template 8 rise to their respective limit positions. The cross shaft stays in the upper die 13 or the lower die 15. When it stays in the upper die 13, the upper ejector pin 10 is driven by the press head 1 to eject it; Rod 17 is ejected.

In this example, before warm extrusion, the working part of the die needs to be preheated with a blowtorch. The preheating temperature is about 300°C. During the warm extrusion process, the mold temperature will reach 500-600°C, and the hardness will drop sharply during continuous operation. , may cause the processing process to be unable to continue. During the warm extrusion process, a spray device is required to spray the cooling liquid to the working part of the die for cooling to reduce the temperature.

In the warm extrusion forging of the cross shaft, the utility model no longer produces flash, which greatly saves the cost and improves the production efficiency, and the manufactured cross shaft has better surface quality and dimensional accuracy, and has significant economic benefits .

Claims (7)

1., for a block forging mould for cross axle Warm Extrusion, comprise die shoe (9), upper bolster (11), lower push rod (17), upper ejector pin (10), it is characterized in that:

Float and be provided with lower bolster (8) in described die shoe (9) upper end, big spring (16) is provided with between die shoe (9) and lower bolster (8), on described lower bolster (8), medium position place is provided with lower cavity die (15), the side of lower bolster (8) is provided with the hook (6) for pinning cope match-plate pattern (12), opposite side is provided with pilot hole, be equipped with guide pillar (14) in pilot hole, guide pillar (14) is through upper bolster (11), cope match-plate pattern (12);

Described upper bolster (11) lower end is fixedly installed cope match-plate pattern (12) by screw (4), cope match-plate pattern (12) is provided with upper cavity die (13), during work, upper cavity die (13) and lower cavity die (15) coordinate, and form confined space.

2. block forging mould according to claim 1, is characterized in that, described hook (6) is articulated with on lower bolster (8).

3. block forging mould according to claim 2, is characterized in that, described hook (6) is provided with the offside of lower bolster (8) hinged place the little spring (7) rotated for auxiliary hook (6).

4. block forging mould according to claim 1, is characterized in that, is also provided with the straight pin (5) for locating between described cope match-plate pattern (12) and upper cavity die (13).

5. block forging mould according to claim 1, is characterized in that, the position that described hook (6) contacts with cope match-plate pattern (12) is also provided with cushion block (3).

6. block forging mould according to claim 1, is characterized in that, is also provided with pressure plare (2) between described upper bolster (11) and cope match-plate pattern (12).

7. block forging mould according to claim 1, is characterized in that, described upper ejector pin (10) and cope match-plate pattern (12), is also provided with floating spring between lower push rod (17) and lower bolster (8).