A hot extrusion die for producing multiple aluminum bars and its assembly method

Abstract

The present invention discloses a one-mold, multi-outlet aluminum rod hot extrusion die and an assembly method thereof, comprising a die body, wherein a plurality of cavities for forming aluminum rods are provided on one side surface of the die body, and a tungsten steel ring is connected to the inside of the cavity. The present invention sets the tungsten steel ring in a T-shaped circular ring shape, and embeds a gasket in the gap between the outer side of the first mounting ring and the inner wall of the die body, so that the die surface of the die body in contact with the outer side of the second mounting ring will not directly contact the aluminum flow, effectively avoiding the problem of the tungsten steel ring loosening or pulling out due to the aluminum rod sticking to the tungsten steel ring after the aluminum rod is formed, thereby ensuring the normal production of the aluminum rod; further, by embedding a gasket on the outer side of the tungsten steel ring and not opening a diversion pit in the cavity, residual aluminum flow is avoided, so that the tungsten steel ring can be kept tight while performing online polishing of the working belt, thereby realizing continuous production of the aluminum rod and improving the production efficiency of the aluminum rod.

Description

Technical Field

[0001] The invention particularly relates to a hot extrusion die for producing multiple aluminum bars and an assembling method thereof. Background Art

[0002] Aluminum alloy has low density, but relatively high strength, good plasticity, good extrusion formability, excellent electrical conductivity, thermal conductivity and corrosion resistance, and is safe and recyclable. Therefore, it is widely used in technical fields such as construction, electric vehicles, ships, aerospace, etc. Hot extrusion dies are a commonly used die in aluminum alloy forming production. After enduring harsh conditions such as high temperature, high pressure, high friction and thermal fatigue, they can produce the required aluminum profile workpieces. Aluminum rods made of H6S material are a type of aluminum profile produced by hot extrusion dies.

[0003] However, when the existing mold body for producing aluminum rods is actually used, the aluminum rods are easily stuck to the working belt of the mold surface during the production process, which can easily pull out the tungsten steel ring embedded in the mold surface or cause the tungsten steel ring to loosen, and the aluminum rod production cannot be normal; at the same time, the wear resistance and heat resistance of the working belt area of ​​the existing mold body are poor. After producing three aluminum rods, the mold is removed due to surface roughness, and aluminum flow remains in the guide pit, affecting polishing, making continuous production impossible and affecting production efficiency.

[0004] Therefore, it is necessary to invent a one-die-multiple-aluminum-bar hot extrusion die and an assembling method thereof to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a one-mold multi-output aluminum rod hot extrusion die and an assembly method thereof, by setting the tungsten steel ring as a T-shaped circular ring and embedding a gasket in the gap between the outer side of the first mounting ring and the inner wall of the die body, so that the die surface of the die body in contact with the outer side of the second mounting ring will not directly contact the aluminum flow, effectively avoiding the problem of the tungsten steel ring loosening or pulling out due to the aluminum rod sticking to the tungsten steel ring after the aluminum rod is formed, thereby ensuring the normal production of the aluminum rod; further, by embedding a gasket on the outer side of the tungsten steel ring and not opening a diversion pit in the mold cavity, residual aluminum flow is avoided, so that the tungsten steel ring can be kept tight and the working belt is polished online, thereby realizing continuous production of aluminum rods and improving the production efficiency of aluminum rods, so as to solve the above-mentioned shortcomings in the technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a hot extrusion die for producing multiple aluminum bars from a single die, comprising a die body, a surface of one side of the die body being provided with a plurality of cavities for forming the aluminum bars, a tungsten steel ring being connected to the inside of the cavity, a backing ring being connected to the outside of the top of the tungsten steel ring, and the outside of the backing ring being in contact with the die body;

[0007] Each of the cavities includes a feed hole and a discharge hole connected to the feed hole, wherein the feed hole is composed of a first mounting hole and a second mounting hole, and the first mounting hole is arranged away from the discharge hole;

[0008] The tungsten steel ring consists of a first mounting ring and a second mounting ring, and the inner diameter of the first mounting ring is smaller than the second mounting inner diameter. The first mounting ring is arranged inside the first mounting hole, and the second mounting ring is arranged inside the second mounting hole.

[0009] Preferably, the number of the cavities is set to four, so that four aluminum bars can be produced from one mold.

[0010] Preferably, the thickness of the tungsten steel ring is set to 13-17 mm.

[0011] Preferably, the thickness of the tungsten steel ring is set to 15 mm.

[0012] Preferably, the gasket and the mold body are configured to be interference fit, and the gasket and the tungsten steel ring are configured to be interference fit.

[0013] Preferably, the inner diameter of the discharge hole on one side close to the feed hole is smaller than the inner diameter of the other side of the discharge hole.

[0014] Preferably, the mold body is configured to be disc-shaped.

[0015] Preferably, the mold body is made of H13 mold steel.

[0016] A method for assembling a hot extrusion die for producing multiple aluminum bars comprises the following steps:

[0017] S1. Inlaying tungsten steel ring: Heat the mold body for 2 hours to raise its temperature to 500-550℃, and then keep it warm for 1 hour. Place the tungsten steel ring in the mold cavity, and set the inlay size diameter according to the interference amount of 2-3%. While the second mounting ring is embedded in the second mounting hole, ensure that the second mounting ring and the mold body have an interference fit, and ensure that the outer surface of the second mounting ring is closely fitted with the inner wall surface of the mold body, so that the inlay of the tungsten steel ring is completed through the interference fit process of thermal expansion and contraction;

[0018] S2. Insert the gasket: Place the gasket above the gap formed between the first mounting plate and the mold body, so that the gasket is embedded in the first mounting hole, and the gasket and the mold body, as well as the gasket and the tungsten steel ring are set to have an interference fit to ensure that the inner and outer sides of the gasket can fit tightly with the tungsten steel ring and the mold body respectively after the gasket is embedded.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention sets the tungsten steel ring as the first mounting ring and the second mounting ring with different inner diameters, and embeds a backing ring in the gap between the outer side of the first mounting ring and the inner wall of the mold body. This prevents the mold surface contacting the outer side of the second mounting ring from directly contacting the aluminum flow, thereby making the embedding of the tungsten steel ring more secure and reliable. This effectively avoids the problem of the tungsten steel ring loosening or pulling out due to the aluminum rod sticking to the tungsten steel ring after molding, thereby ensuring the normal production of the aluminum rod.

[0021] 2. The present invention avoids residual aluminum flow by embedding a backing ring on the outside of the tungsten steel ring and not opening a diversion pit in the cavity, so that the inner wall of the tungsten steel ring, that is, the working belt of the mold body, can be exposed. The tungsten steel ring can be kept tight while the working belt is polished online, thereby realizing continuous production of aluminum rods and improving the production efficiency of aluminum rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a cross-sectional view of the present invention;

[0025] Figure 3 A top view of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the tungsten steel ring of the present invention;

[0027] Figure 5 It is a schematic diagram of the gasket ring structure of the present invention.

[0028] Description of reference numerals:

[0029] 1 mold body, 2 cavity, 3 tungsten steel ring, 31 first mounting ring, 32 second mounting ring, 4 gasket, 5 feed hole, 51 first mounting hole, 52 second mounting hole, 6 discharge hole. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] The present invention provides Figure 1-5The hot extrusion die for producing multiple aluminum bars in a single die is shown, comprising a die body 1, with a plurality of cavities 2 for forming aluminum bars formed on one side of the die body 1. Tungsten steel rings 3 are connected to the inside of the cavities 2, and a backing ring 4 is connected to the outside of the top of the tungsten steel ring 3. The outside of the backing ring 4 contacts the die body 1.

[0032] Each of the mold cavities 2 includes a feed hole 5 and a discharge hole 6 connected to the feed hole 5. The feed hole 5 consists of a first mounting hole 51 and a second mounting hole 52. The first mounting hole 51 is arranged away from the discharge hole 6.

[0033] The tungsten steel ring 3 consists of a first mounting ring 31 and a second mounting ring 32 , and the inner diameter of the first mounting ring 31 is smaller than the second mounting inner diameter. The first mounting ring 31 is arranged inside the first mounting hole 51 , and the second mounting ring 32 is arranged inside the second mounting hole 52 .

[0034] Furthermore, in the above technical solution, the number of the cavities 2 is set to four, so that four aluminum bars can be produced from one mold. Four cavities 2 are opened on the mold body 1, and the mold surface between the four cavities 2 of the diverter bridge is ensured to have sufficient pressure resistance, so that multiple aluminum bars can be produced from one mold, and the output and efficiency of single-shift profiles can be greatly improved.

[0035] Furthermore, in the above technical solution, the thickness of the tungsten steel ring 3 is set to 13-17 mm, the thickness of the tungsten steel ring 3 is set to 15 mm, the gasket 4 and the mold body 1 are set to interference fit, and the gasket 4 and the tungsten steel ring 3 are set to interference fit, thereby increasing the effective contact surface gap between the tungsten steel ring 3 and the mold surface of the mold body 1, so that the tungsten steel ring 3 can be more stably embedded in the mold body 1.

[0036] Furthermore, in the above technical solution, the inner diameter of the discharge hole 6 on the side close to the feed hole 5 is smaller than the inner diameter of the other side of the discharge hole 6, so that the aluminum rod can be discharged stably after forming, which is convenient for cutting and removing the aluminum rod after forming.

[0037] Furthermore, in the above technical solution, the mold body 1 is configured to be disc-shaped and is made of H13 mold steel, which facilitates the use of the mold body 1 and is beneficial to the production of aluminum bars.

[0038] A method for assembling a hot extrusion die for producing multiple aluminum bars comprises the following steps:

[0039] S1. Inserting the tungsten steel ring: Heat the mold body 1 for 2 hours to 530°C, keep it warm for 1 hour, place the tungsten steel ring 3 in the mold cavity 2, and set the inserting size diameter to 2.5% of the interference allowance. While the second mounting ring 32 is inserted into the second mounting hole 52, ensure that the second mounting ring 32 and the mold body 1 have an interference fit, and ensure that the outer surface of the second mounting ring 32 is tightly fitted with the inner wall surface of the mold body 1. Thus, the tungsten steel ring 3 is inserted through the interference fit process of thermal expansion and contraction.

[0040] S2. Insert the gasket: Place the gasket 4 above the gap formed between the first mounting plate and the mold body 1, so that the gasket 4 is embedded in the first mounting hole 51, and the gasket 4 and the mold body 1, as well as the gasket 4 and the tungsten steel ring 3 are set to be interference fit, to ensure that after the gasket 4 is embedded, the inner and outer sides can be tightly fitted with the tungsten steel ring 3 and the mold body 1 respectively, so that the matching surface of the mold body 1 and the tungsten steel ring 3 will not directly contact the aluminum rod, to prevent residual aluminum from sticking to the tungsten steel ring 3 during shearing, and pulling out the embedded tungsten steel ring 3 or causing the tungsten steel ring 3 to loosen, so that the tungsten steel ring 3 can be kept tight while performing online polishing of the working belt to achieve continuous production of aluminum rods.

[0041] Implementation method: When the present invention is in use, after the aluminum flow flows into the cavity 2 through the feed hole 5, it flows out through the discharge hole 6 to be formed into an aluminum rod, and by setting the tungsten steel ring 3 as a first mounting ring 31 and a second mounting ring 32 with different inner diameters, the cross section of the tungsten steel ring 3 composed of the first mounting ring 31 and the second mounting ring 32 is T-shaped, preparing for the insertion of the gasket 4. When a gasket 4 is embedded in the gap between the outer side of the first mounting ring 31 and the inner wall of the mold body 1, the mold surface at the connection between the mold body 1 and the tungsten steel ring 3 at the feed hole 5, that is, the mold surface contacting the outer side of the mold body 1 and the second mounting ring 32, will not directly contact the aluminum flow, thereby making the embedding of the tungsten steel ring 3 more firm and reliable, and effectively avoiding the problem of the tungsten steel ring 3 being loose or pulled out due to the aluminum rod sticking to the tungsten steel ring 3 after molding. By embedding a gasket 4 on the outside of the tungsten steel ring 3 and inserting it in the cavity 2 No diversion pit is opened inside to avoid residual aluminum flow, so that the inner wall of the tungsten steel ring 3, that is, the working belt of the mold body 1 can be exposed, so that the tungsten steel ring 3 can be kept tight while the working belt is polished online, thereby realizing continuous production of aluminum rods and improving the production efficiency of aluminum rods. The four cavities 2 enable the mold body 1 to form four aluminum rods at one time, greatly improving production efficiency and reducing enterprise costs. This embodiment specifically solves the problem that the mold body 1 for producing aluminum rods in the existing technology is currently used. The aluminum rod is easily attached to the working belt of the mold surface during the production process, and the tungsten steel ring 3 embedded in the mold surface is easily pulled out or the tungsten steel ring 3 is loosened, and the aluminum rod cannot be produced normally; at the same time, the wear resistance and heat resistance of the working belt area of ​​the existing mold body 1 are poor. After producing three aluminum rods, the mold is unloaded due to surface roughening, and aluminum flow remains in the diversion pit, affecting polishing, making continuous production impossible, and affecting production efficiency.

[0042] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A hot extrusion die for multiple aluminum bars, characterized by: The mold body (1) comprises a mold body (1), wherein a plurality of cavities (2) for forming aluminum rods are formed on one side of the mold body (1), a tungsten steel ring (3) is connected to the inside of the cavity (2), a gasket (4) is connected to the outside of the top of the tungsten steel ring (3), and the outside of the gasket (4) is in contact with the mold body (1); Each of the mold cavities (2) comprises a feed hole (5) and a discharge hole (6) connected to the feed hole (5), wherein the feed hole (5) is composed of a first mounting hole (51) and a second mounting hole (52), and the first mounting hole (51) is arranged away from the discharge hole (6); The tungsten steel ring (3) is composed of a first mounting ring (31) and a second mounting ring (32), and the inner diameter of the first mounting ring (31) is smaller than the inner diameter of the second mounting ring. The first mounting ring (31) is arranged inside the first mounting hole (51), and the second mounting ring (32) is arranged inside the second mounting hole (52). The backing ring (4) and the mold body (1) are arranged to be interference fit, and the backing ring (4) and the tungsten steel ring (3) are arranged to be interference fit.

2. The hot extrusion die for multiple aluminum bars according to claim 1, characterized in that: The number of the mold cavities (2) is set to four, so that four aluminum bars can be produced from one mold.

3. The hot extrusion die for multiple aluminum bars according to claim 1, characterized in that: The thickness of the tungsten steel ring (3) is set to 13-17 mm.

4. The hot extrusion die for multiple aluminum rods according to claim 3, characterized in that: The thickness of the tungsten steel ring (3) is set to 15 mm.

5. The hot extrusion die for multiple aluminum bars according to claim 1, characterized in that: The inner diameter of the side of the discharge hole (6) close to the feed hole (5) is smaller than the inner diameter of the other side of the discharge hole (6).

6. The hot extrusion die for multiple aluminum bars according to claim 1, characterized in that: The mold body (1) is configured in a disc shape.

7. The hot extrusion die for multiple aluminum rods according to claim 1, characterized in that: The mold body (1) is made of H13 mold steel.

8. A method for assembling a hot extrusion die for multiple aluminum bars according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Inlaying the tungsten steel ring: heating the mold body (1) for 2 hours to raise its temperature to 500-550°C, and then keeping it warm for 1 hour, placing the tungsten steel ring (3) in the mold cavity (2), and setting the inlay size diameter according to the interference amount of 2-3%, so that the second mounting ring (32) is embedded in the second mounting hole (52) while ensuring that the second mounting ring (32) and the mold body (1) have an interference fit, ensuring that the outer surface of the second mounting ring (32) is closely fitted with the inner wall surface of the mold body (1), thereby completing the inlaying of the tungsten steel ring (3) through the interference fit process of thermal expansion and contraction; S2. Inserting the gasket ring: placing the gasket ring (4) above the gap formed between the first mounting plate and the mold body (1), so that the gasket ring (4) is embedded in the first mounting hole (51), and the gasket ring (4) and the mold body (1), as well as the gasket ring (4) and the tungsten steel ring (3) are all set to be interference fit, ensuring that after the gasket ring (4) is embedded, the inner and outer sides can be tightly fitted with the tungsten steel ring (3) and the mold body (1) respectively.

Images