Closed forming die for aluminum alloy free forgings

Abstract

The utility model discloses an aluminum alloy free forge piece closed type forming die, which relates to the technical field of aluminum alloy free forge pieces, and comprises a forge piece main body and a reinforcing mechanism, the reinforcing mechanism is fixedly connected in the forge piece main body, a lower die main body is arranged in the forge piece main body, and a cooling pipeline is arranged in the lower die main body. Internal cooling liquid is arranged in the cooling pipeline, the reinforcing mechanism is located in the center of the interior of the forge piece body and plays a role in reinforcing the forge piece body, the lower die body is a constituent part of the bottom of the forge piece body, and the cooling pipeline is connected to the interior of the lower die body in a penetrating mode. Compared with an existing common closed forming die, the aluminum alloy free forging closed forming die has the advantages that the reinforcing mechanism increases the contact area of the ejector rod and the casting main body, the quality and durability of a casting are improved, the situation that the casting main body is loosened is avoided, the casting main body can be kept at a proper temperature through cooling liquid, and the casting quality is improved. And high-temperature accumulation in the casting main body and thermal stress generated in the casting are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy open-die forgings, and particularly relates to a closed-die forming die for aluminum alloy open-die forgings. Background Technique

[0002] Closed-die forging, also known as press-die forging, is a metal forming process in which a heated metal blank is placed between two or more specially shaped dies that contain cavities matching the desired final shape of the part. The dies are brought together to enclose the material, and high pressure is applied to compress and form the metal into the precise shape. Since the forging method is relatively rough, some adverse effects will occur during the use of the cast main body produced.

[0003] For example, a closed-die forming die for an annular open-die forging with the application number CN202023169064.4; the die includes an outer tire die and a mandrel; the outer tire die is annular, the upper die ejection angle is 0.8° - 1.5°, the inner chamfer at the upper end is R5 - R10, and the inner side at the lower end of the outer tire die is not chamfered; the mandrel is a stepped shaft, the stepped part is in clearance fit with the upper end of the outer tire die, and the lower end of the step is a right angle; the height dimensions of the outer tire die and the mandrel are the same, and the preformed forging is located between the mandrel and the outer tire die. The outer die membrane of this utility model ensures the outer diameter dimension and surface quality of the forging, the tool mandrel ensures the inner diameter dimension and the forging height dimension of the forging, and the cooperation of the special closed-die combination die ensures the coaxiality requirement of the inner and outer diameters of the forging. However, there is no reinforcement mechanism inside this closed-die forming die, the durability is poor, it is easy to cause the failure of the later castings during use, and the temperature accumulation is difficult to dissipate, and thermal cracks are likely to occur, affecting the service life of the cast main body.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structural deficiencies, and a closed-die forming die for aluminum alloy open-die forgings is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a closed-die forming die for aluminum alloy open-die forgings to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a closed-die forming die for aluminum alloy open-die forgings, including a forging main body and a reinforcement mechanism. The inside of the forging main body is fixedly connected with a reinforcement mechanism, and a lower die main body is arranged inside the forging main body. A cooling pipeline is opened inside the lower die main body, and an internal coolant is arranged inside the cooling pipeline.

[0007] Preferably, the reinforcement mechanism includes a ejector rod fixedly connected to the bottom position of the forging main body, and a reinforcing rib is fixedly connected to the outside of the ejector rod, and a fixing ring is fixedly connected to the outside of the reinforcing rib.

[0008] Preferably, a lower die insert is arranged outside the fixing ring, and a lower die ring is fixedly connected to the outside of the lower die insert.

[0009] Preferably, an enlarged diameter ring is fixedly connected to the inside of the lower die ring, and a punch is fixedly connected to the top of the enlarged diameter ring.

[0010] Preferably, an upper die ring is fixedly connected to the outside of the punch, and a coolant groove is formed inside the upper die ring.

[0011] Preferably, external coolant is arranged inside the coolant groove, and a pore filling coating is arranged outside the forging body.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. Through the setting of the reinforcement mechanism and the internal and external two groups of coolants, the reinforcing ribs and the fixing ring inside the reinforcement mechanism increase the contact area between the ejector rod and the casting body, improve the quality and durability of the casting, avoid the situation of looseness in the casting body, reduce the problem of failure in the later use of the casting. The setting of two groups of coolants can keep the casting body at a suitable temperature, avoid the accumulation of high temperature inside the casting body and the generation of thermal stress inside the casting, which is prone to thermal cracks. The setting of the coolant inside the casting body extends the service life of the casting body and improves the performance of the casting body;

[0014] 2. Through the setting of the enlarged diameter ring and the pore filling coating, the stress-bearing area at the bottom of the punch is enlarged, the compressive effect inside the casting body is increased, the impact force received by the casting body is dispersed, and the stability of the casting body during use is improved. Due to the high defect rate of the casting, pores will be generated. Adding a filling coating outside the casting body can fill some pores and maintain the quality of the casting body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic internal sectional structure view of the whole of the present utility model;

[0016] Figure 2 is a schematic structure view of the reinforcement mechanism 2 of the present utility model;

[0017] Figure 3 is a schematic overall three-dimensional structure view of the present utility model;

[0018] Figure 4 is a schematic front view of the internal section of the present utility model.

[0019] In the figure: 1. Forging main body; 2. Reinforcement mechanism; 201. Ejector rod; 202. Reinforcing rib; 203. Fixed ring; 3. Lower die main body; 4. Internal coolant; 5. Lower die insert; 6. Lower die ring; 7. Enlarged diameter ring; 8. Punch; 9. Upper die ring; 10. Coolant groove; 11. External coolant; 12. Porosity filling coating. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] As Figure 1 - Figure 2 shown, a closed die for forming an aluminum alloy free forging includes a forging main body 1 and a reinforcement mechanism 2. The reinforcement mechanism 2 is fixedly connected inside the forging main body 1, and a lower die main body 3 is arranged inside the forging main body 1. A cooling pipeline is opened inside the lower die main body 3, and an internal coolant 4 is arranged inside the cooling pipeline. The reinforcement mechanism 2 is located at the center inside the forging main body 1 and plays a role in strengthening the forging main body 1. The lower die main body 3 is a component at the bottom of the forging main body 1. The cooling pipeline is connected through the inside of the lower die main body 3, and the internal coolant 4 in the cooling pipeline maintains the forging main body 1 at an appropriate temperature.

[0022] As Figure 3 - Figure 4 shown, the reinforcement mechanism 2 includes an ejector rod 201 fixedly connected to the bottom position of the forging main body 1, and a reinforcing rib 202 is fixedly connected to the outside of the ejector rod 201. A fixed ring 203 is fixedly connected to the outside of the reinforcing rib 202. The reinforcing rib 202 is vertically distributed with the bottom of the forging main body 1. The fixed rings 203 are evenly distributed on the outside of the reinforcing rib 202. Through functions such as bearing or transmitting the upper structure load, fixing the structure, avoiding deformation, and increasing the structural strength, the ejector rod 201 can ensure the stability, safety, and service life of the structure.

[0023] Furthermore, a lower die insert 5 is arranged on the outside of the fixed ring 203, and a lower die ring 6 is fixedly connected to the outside of the lower die insert 5. An enlarged diameter ring 7 is fixedly connected to the inside of the lower die ring 6, and a punch 8 is fixedly connected to the top of the enlarged diameter ring 7. The lower die insert 5 facilitates the exhaust work when manufacturing the forging main body 1. The enlarged diameter ring 7 is located between the punch 8 and the lower die ring 6 to increase the compressive resistance of the forging main body 1.

[0024] Further, an upper die ring 9 is fixedly connected to the outside of the punch 8, and a coolant groove 10 is provided inside the upper die ring 9. An external coolant 11 is arranged inside the coolant groove 10, and a pore filling coating 12 is provided on the outside of the forging body 1. The external coolant 11 takes away the heat of the forging through the convection and conduction of the liquid. Pores may be generated in the forging body 1, and the pore filling coating 12 fills the pores to enhance the quality of the forging body 1.

[0025] Working principle: When using this closed die forging die for aluminum alloy free forgings, first, a reinforcement mechanism 2 composed of a ejector rod 201, a reinforcing rib 202, and a fixing ring 203 is added inside the forging body 1. During the use of the forging body 1, the strength of the forging body 1 is improved. The internal coolant 4 conveyed inside the cooling pipe of the lower die body 3 and the external coolant 11 inside the coolant groove 10 opened in the upper die ring 9 act on each other to maintain the normal temperature of the forging body 1. The enlarged diameter ring 7 at the bottom of the lower die ring 6 increases the force-bearing area of the punch 8, and through the stability of the forging body 1, finally, a pore filling coating 12 is attached to the surface of the forging body 1 to fill the pores inside the forging body 1. This is the working principle of this closed die forging die for aluminum alloy free forgings.

Claims

1. A closed forming die for an aluminum alloy free forging, comprising a forging body (1) and a reinforcement mechanism (2), characterized in that: The forging body (1) is fixedly connected to a reinforcing mechanism (2), and a lower die body (3) is arranged inside the forging body (1). A cooling pipeline is provided inside the lower die body (3), and an internal coolant (4) is arranged inside the cooling pipeline.

2. The closed forming die for aluminum alloy free forging according to claim 1, characterized in that: The reinforcement mechanism (2) comprises a push rod (201) fixedly connected to the bottom position of the forging body (1), and the outside of the push rod (201) is fixedly connected to a reinforcing rib (202), and the outside of the reinforcing rib (202) is fixedly connected to a fixing ring (203).

3. The closed forming die for aluminum alloy free forgings according to claim 2, characterized in that: A lower die insert (5) is arranged outside the fixing ring (203), and a lower die ring (6) is fixedly connected to the outside of the lower die insert (5).

4. The closed forming die for aluminum alloy free forging according to claim 3, characterized in that: The inside of the lower die ring (6) is fixedly connected with an enlarged diameter ring (7), and the top of the enlarged diameter ring (7) is fixedly connected with a punch (8).

5. The closed forming die for aluminum alloy free forging according to claim 4, characterized in that: The outside of the punch (8) is fixedly connected to an upper die ring (9), and a cooling liquid tank (10) is provided inside the upper die ring (9).

6. The closed forming die for aluminum alloy free forgings according to claim 5, characterized in that: An external coolant (11) is arranged inside the coolant tank (10), and a pore filling coating (12) is arranged outside the forging body (1).

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