A new structure of variable-diameter die capable of changing extrusion ratio

Abstract

The utility model discloses a new structure of variable diameter die that can change extrusion ratio, it includes die cylinder and aluminium profile extrusion die, the aluminium profile extrusion die has mould core, welding chamber, work zone, mould hole, the aluminium profile extrusion die front section is provided with variable diameter flow guide structure, the variable diameter flow guide structure has the sleeve joint portion of installation in the outside of aluminium profile extrusion die, sets up in the variable diameter structure formation part between aluminium profile extrusion die and die cylinder, the variable diameter structure formation part is provided with primary variable diameter extrusion chamber, the outer wall of variable diameter structure formation part is provided with recess portion in circumference, the utility model designs two -stage variable diameter die structure, and the variable diameter flow guide structure is designed on the basis of original 1000T die structure front section, and accordingly reduces profile primary variable diameter difference, through first -stage variable diameter extrusion, reduces profile die flow guide feeding variable diameter value, and accordingly matches profile suitable aluminium extrusion ratio.

Description

Technical Field

[0001] This utility model relates to the field of aluminum extrusion profile mold technology, and in particular to a new structure of variable diameter mold that can change the extrusion ratio. Background Technology

[0002] Aluminum extrusion products are manufactured using extrusion machines of different tonnages, depending on the size of the structural cross-sectional area. Figure 1 The 1000T press module shown includes a die cylinder 1 (with an inner diameter of 133mm) and an aluminum profile extrusion die 2 (the aluminum profile extrusion die 2 includes an upper die 2a and a lower die 2b). The aluminum profile extrusion die 2 has a die core 3, a welding chamber 4, a working zone 5, and a die hole 6. The module processes profiles with a cross-sectional area of ​​507.6mm². The original 1000T extrusion press (Ø127mm aluminum billet, die cylinder diameter Ø132mm) had an extrusion ratio of 26.9. Due to equipment restructuring and other reasons, the original 1000T press was removed. Our company's smallest internal press is now a 2200T (Ø228mm aluminum billet, die cylinder diameter Ø238mm). If the original 1000T profile with a cross-sectional area of ​​507.6mm² is processed using the 2200T press with a traditional die structure, its extrusion ratio would be 87.6, which is clearly too high (generally, the extrusion ratio for profiles is <40). Utility Model Content

[0003] The present invention aims to solve the above-mentioned technical problems and provide a new structure for a variable diameter die that can change the extrusion ratio.

[0004] To solve the above-mentioned technical problems, the present invention provides a new structure of a variable diameter die that can change the extrusion ratio, which includes a die cylinder (1) and an aluminum profile extrusion die (2). The aluminum profile extrusion die (2) has a die core (3), a welding chamber (4), a working zone (5), and a die hole (6). A variable diameter guide structure (7) is provided at the front of the aluminum profile extrusion die (2). The variable diameter guide structure has a sleeve part (7a) installed outside the aluminum profile extrusion die and a variable diameter structure forming part (7b) provided between the aluminum profile extrusion die and the die cylinder. The variable diameter structure forming part is provided with a first-stage variable diameter extrusion chamber (7c). A recess (7d) is provided circumferentially on the outer wall of the variable diameter structure forming part. The inner diameter of the first-stage variable diameter extrusion chamber is smaller than the inner diameter of the die cylinder, and the inner diameter of the first-stage variable diameter extrusion chamber is larger than the inner diameter at the entrance of the welding chamber.

[0005] Furthermore, the length of the primary variable diameter extrusion chamber (7c) is 40 mm.

[0006] Furthermore, the diameter of the primary variable diameter extrusion chamber (7c) is 133 mm.

[0007] Furthermore, the inner diameter of the primary variable diameter extrusion chamber (7c) is 54%-56% of the inner diameter of the die cylinder.

[0008] Furthermore, the variable diameter guide structure is integrally molded, which not only improves the overall integrity of the structure but also facilitates installation and maintenance.

[0009] This utility model has the following beneficial effects:

[0010] 1. This utility model designs a two-stage variable diameter die structure. Based on the original 1000T die structure, a variable diameter guide structure is designed in the front section to reduce the initial diameter difference of the profile. Through the first stage of variable diameter extrusion, the diameter change value of the profile die guide material is reduced, thereby matching the appropriate aluminum extrusion ratio of the profile.

[0011] 2. By using variable-diameter extrusion, the excessive shear force of the aluminum extrusion fluid is reduced, ensuring that the aluminum extrusion temperature of the product is not too high. At the same time, the elastic force of the aluminum extrusion die is reduced.

[0012] 3. The above-mentioned variable diameter mold design can solve the problem of enterprises not having matching small machines for products with smaller cross-sections in some business areas. The mold structure can be designed to be extruded on a machine of the next higher specification through the above-mentioned variable diameter method. Attached Figure Description

[0013] Figure 1 The background section shows the mold structure diagram of a 1000T press module.

[0014] Figure 2 This is a cross-sectional view of a novel variable-diameter die structure that can change the extrusion ratio.

[0015] Figure 3 This is a cross-sectional view of the variable diameter guide structure. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] The present invention provides a novel structure for a variable-diameter die that can change the extrusion ratio. See [link to relevant documentation]. Figure 2 It includes a die cylinder 1 and an aluminum profile extrusion die 2. The aluminum profile extrusion die 2 has a die core 3, a welding chamber 4 (the aluminum extruded metal enters the welding chamber from the guide hole to form a closed technical fluid), a working zone 5, and a die hole 6. The product outline formed by the working zone is the cavity. The front section of the aluminum profile extrusion die 2 is provided with a variable diameter guide structure 7. The variable diameter guide structure has a sleeve part 7a installed outside the aluminum profile extrusion die and a variable diameter structure forming part 7b set between the aluminum profile extrusion die and the die cylinder. The variable diameter structure forming part is provided with a first-stage variable diameter extrusion chamber 7c. The outer wall of the variable diameter structure forming part is provided with a recess 7d in the circumferential direction.

[0018] from Figure 2It can be seen that the inner diameter of the primary variable diameter extrusion chamber is smaller than the inner diameter of the die cylinder, and the inner diameter of the primary variable diameter extrusion chamber is larger than the inner diameter at the entrance of the welding chamber. The length of the primary variable diameter extrusion chamber 7c is 40mm, and the diameter of the primary variable diameter extrusion chamber 7c is 133mm. The inner diameter of the die cylinder 1 is 238mm. Thus, the inner diameter of the primary variable diameter extrusion chamber 7c is 55.88% of the inner diameter of the die cylinder. In this embodiment, a 2200T press module is used.

[0019] See Figure 3 The variable diameter guide structure is integrally molded. The inner side of the variable diameter guide structure has a multi-step structure that mates with the upper and lower dies. This multi-step structure better secures the variable diameter guide structure to the upper and lower dies of the aluminum profile extrusion die 2. The variable diameter guide structure has a first end face 7-1 that contacts the die cylinder end face and a second end face 7-2 located at the inner cavity opening of the die cylinder. Annular protrusions can be distributed on the first end face 7-1, while annular recesses are provided at corresponding positions on the die cylinder. This allows for better positioning and installation of the variable diameter guide structure. Furthermore, the annular protrusions can also have external threads, while the annular recesses can be fitted with internal threads, allowing the variable diameter guide structure to achieve rapid assembly through the threaded structure.

[0020] For variable diameter guide structures, three locking holes (polygonal holes, such as quadrilaterals) can be set in a ring on the upper mold mounting section and the lower mold mounting section of the variable diameter guide structure. Corresponding locking holes are also set on the upper mold and the lower mold. After the variable diameter guide structure is installed in place, the locking rod with magnetic material on the top is inserted into the locking hole to improve the convenience of installation and maintenance of the variable diameter guide structure. The magnetic locking rod can be quickly pulled out when the external force is greater than the magnetic attraction force.

[0021] By using the first-stage variable-diameter extrusion, the diameter change value of the profile die guide feeding is reduced, thereby matching the appropriate aluminum extrusion ratio for the profile. Variable-diameter extrusion also reduces excessive shear force in the aluminum extrusion fluid, ensuring the product's aluminum extrusion temperature is not too high. Simultaneously, it reduces the elastic force of the aluminum extrusion die. This variable-diameter die design can solve the problem of companies lacking matching small extrusion machines for certain smaller cross-section products; the die structure can be designed for extrusion production on a machine of a higher specification using this variable-diameter method.

[0022] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A novel structure for a variable-diameter die capable of changing the extrusion ratio, comprising a die cylinder (1) and an aluminum profile extrusion die (2), the aluminum profile extrusion die (2) having a die core (3), a welding chamber (4), a working zone (5), and a die hole (6), characterized in that, The aluminum profile extrusion die (2) is provided with a variable diameter guide structure (7) at the front end. The variable diameter guide structure has a sleeve part (7a) installed outside the aluminum profile extrusion die and a variable diameter structure forming part (7b) provided between the aluminum profile extrusion die and the die cylinder. The variable diameter structure forming part is provided with a first-stage variable diameter extrusion chamber (7c). The inner diameter of the first-stage variable diameter extrusion chamber is smaller than the inner diameter of the die cylinder and the inner diameter of the first-stage variable diameter extrusion chamber is larger than the inner diameter at the entrance of the welding chamber. The outer wall of the variable diameter structure forming part is provided with a recess (7d) in the circumferential direction.

2. The novel variable-diameter die structure according to claim 1, characterized in that, The inner diameter of the primary variable diameter extrusion chamber (7c) is 54%-56% of the inner diameter of the die cylinder.

3. The novel variable-diameter die structure according to claim 1, characterized in that, The length of the primary variable diameter extrusion chamber (7c) is 40 mm.

4. A novel variable-diameter die structure capable of changing the extrusion ratio according to claim 1, characterized in that, The diameter of the primary variable diameter extrusion chamber (7c) is 133 mm.

5. A novel variable-diameter die structure capable of changing the extrusion ratio according to claim 1, characterized in that, The variable diameter guide structure is integrally molded.

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