Head shrinking device for aluminum alloy circular tube

Abstract

The utility model relates to the technical field of aluminum alloy production, in particular to an aluminum alloy circular tube head shrinking device, and aims to solve the problems that in the head shrinking process before cold drawing forming of an aluminum alloy rectangular tube at present, due to the lack of a special head shrinking tool, the head of a large-specification aluminum alloy circular tube is generally difficult to shrink quickly, or the shrinking precision of a transition area after head shrinking is poor, and the head shrinking efficiency is high. And finally, the overall production efficiency of the aluminum alloy round pipe is affected. According to the device, an upper die, a lower die, a right die and a left die are combined into an aluminum alloy round pipe extrusion shrinkage die, under the condition that the lower die is fixed, a first driving hydraulic cylinder drives the upper die to move downwards, a second driving hydraulic cylinder drives the right die and the left die to move oppositely, and under the co-extrusion action of the upper die, the right die, the left die and the lower die, the aluminum alloy round pipe is extruded and shrunk. The head shrinking position of the aluminum alloy circular pipe is rapidly shrunk and formed, uniform transition of a head shrinking area and a body of the aluminum alloy circular pipe is ensured, the structural strength of a head shrinking transition area of the aluminum alloy circular pipe is effectively improved, and then the follow-up overall production quality and efficiency of the aluminum alloy circular pipe are improved.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy production technology, specifically to an aluminum alloy round tube shrinking device. Background Technology

[0002] The production process of aluminum alloy rectangular tubes is complex and costly. Cold drawing is a common production method, as all aluminum alloy rectangular tubes are formed by cold drawing. Round tubes are shaped into the desired product using rectangular molds. Before drawing, the aluminum alloy round tubes need to be reduced in size because their diameter is larger than the final rectangular tube size. Without this reduction, the tubes cannot pass smoothly through the mold holes. Currently, the reduction process for aluminum alloy round tubes lacks specialized and efficient tooling, making it difficult to quickly reduce the size of larger tubes. This results in longer reduction times, lower operational safety, and increased risk of breakage in the transition zone after reduction, ultimately affecting the overall production efficiency and quality of aluminum alloy rectangular tubes. Utility Model Content

[0003] This invention provides a device for shrinking the head of an aluminum alloy round tube to solve the problems mentioned above.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A device for reducing the diameter of an aluminum alloy round tube includes a support, a lower mold detachably connected to the top of the support, a right mold and a left mold symmetrically arranged on both sides of the lower mold, a second driving hydraulic cylinder connected to the side of the right mold and the left mold, and an upper mold also provided on the top of the lower mold, the top of the upper mold being connected to a first driving hydraulic cylinder.

[0006] Furthermore, the bottom of the lower mold is provided with a third T-slot, and the lower mold is connected to the support through the third T-slot.

[0007] Furthermore, both the right mold and the left mold are provided with a second T-slot on their sides, and both the right mold and the left mold are connected to the second driving hydraulic cylinder through the second T-slot.

[0008] Furthermore, the top of the upper mold is provided with a first T-slot, and the upper mold is connected to the first driving hydraulic cylinder through the first T-slot.

[0009] Furthermore, the upper mold is a rectangular iron block connected to the T-slot of the equipment, with a smooth and flat surface. The lower longitudinal end of the iron block is machined into an approximately semi-circular arc shape, the size of which is determined according to the diameter of the tube being shrunk. The diameters of the front and back of the arc are different and at a certain angle. The lower mold mainly serves as a support during the shrinking process. The lower end face of the lower mold is connected to the T-slot of the equipment, and the upper end face of the lower mold is also machined into an approximately circular arc shape with a smooth surface. The left and right templates are a pair of symmetrical devices connected to the T-slot of the equipment. During the shrinking process, the end of the left and right templates closest to the product is machined into an angled arc shape, the size of which determines the angle of the transition zone of the product after shrinking.

[0010] This utility model has the following beneficial effects:

[0011] This utility model provides an aluminum alloy round tube shrinking device. It combines an upper die, a right die, a left die, and a lower die to form an extrusion shrinking mold for the aluminum alloy round tube. The aluminum alloy round tube is then inserted through the central circular hole of this mold. While the lower die remains fixed, a first driving hydraulic cylinder moves the upper die downwards, and a second driving hydraulic cylinder moves the right and left dies in opposite directions. Under the combined extrusion action of the upper, right, left, and lower dies, the shrinking area of ​​the aluminum alloy round tube is rapidly shrunk, ensuring a uniform transition between the shrinking area and the tube body. This effectively improves the structural strength of the shrinking and transition areas, thereby enhancing the overall production quality and efficiency of the aluminum alloy round tube. It solves the problem that in the current process of shrinking aluminum alloy rectangular tubes before cold drawing, the lack of dedicated shrinking fixtures often leads to difficulties in rapidly shrinking larger aluminum alloy round tubes or poor shrinkage accuracy in the transition area after shrinking, ultimately affecting the overall production efficiency of the aluminum alloy round tube. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the upper mold structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the right and left molds of this utility model.

[0015] Figure 4 This is a schematic diagram of the lower mold structure of this utility model.

[0016] Figure 5 This is a schematic diagram of the aluminum alloy round tube structure after the head is reduced.

[0017] The meanings of the reference numerals in the attached figures are as follows:

[0018] 1. Upper mold; 2. First T-slot; 3. First drive hydraulic cylinder; 4. Right mold; 5. Left mold; 6. Second T-slot; 7. Second drive hydraulic cylinder; 8. Lower mold; 9. Third T-slot; 10. Support; 11. Aluminum alloy round tube; 12. Shrinking area; 13. Transition area. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1-5 As shown, an aluminum alloy round tube shrinking device includes a support 10. The top of the support 10 is detachably connected to a lower mold 8. A right mold 4 and a left mold 5 are symmetrically arranged on both sides of the lower mold 8. The sides of the right mold 4 and the left mold 5 are each connected to a second driving hydraulic cylinder 7. An upper mold 1 is also provided on the top of the lower mold 8, and the top of the upper mold 1 is connected to a first driving hydraulic cylinder 3.

[0021] The bottom of the lower mold 8 is provided with a third T-slot 9, and the lower mold 8 is connected to the support 10 through the third T-slot 9.

[0022] Both the right mold 4 and the left mold 5 are provided with a second T-slot 6 on their sides, and both the right mold 4 and the left mold 5 are connected to the second drive hydraulic cylinder 7 through the second T-slot 6.

[0023] The top of the upper mold 1 is provided with a first T-slot 2, and the upper mold 1 is connected to the first driving hydraulic cylinder 3 through the first T-slot 2.

[0024] In practical application, the lower mold 8 and support 10 are installed beforehand, followed by the installation of the right mold 4, left mold 5, and upper mold 1. After the molds are properly installed, the control power of the first driving hydraulic cylinder 3 and the second driving hydraulic cylinder 7 is turned on, causing the first driving hydraulic cylinder 3 to drive the upper mold 1 and the second driving hydraulic cylinder 7 to drive the right mold 4 and left mold 5 to open to their maximum clamping arc position. The aluminum alloy round tube 11 is then placed on the lower mold 8. After confirming the start of the shrinking process, the upper mold 1 moves downward under the drive of the first driving hydraulic cylinder 3 until it clamps the aluminum alloy round tube 11. Under the drive of the second driving hydraulic cylinder 7, the right mold 4 and left mold 5 begin to move closer to the aluminum alloy round tube 11, clamping the aluminum alloy round tube 11. After tube 11 is clamped to the required size, the first driving hydraulic cylinder 3 and the second driving hydraulic cylinder 7 are retracted, and respectively drive the upper mold 1, the right mold 4 and the left mold 5 to disengage. Then, the aluminum alloy round tube 11 is rotated 90° and the previous extrusion action is repeated to complete the head reduction of the aluminum alloy round tube 11. Then, the extrusion is stopped, and the next aluminum alloy round tube 11 is replaced to continue the head reduction process. Furthermore, if it is necessary to reduce the head of aluminum alloy round tubes 11 of other specifications, only the mold needs to be changed. The entire head reduction process is fast, efficient and precise, which effectively improves the head reduction efficiency and quality of aluminum alloy round tubes 11 and greatly ensures the efficiency of subsequent stretching preparation of aluminum alloy round tubes 11. Therefore, the device has good practicality.

Claims

1. An aluminum alloy round tube shrinking device, comprising a support (10), characterized in that: The support (10) is detachably connected to the top of the lower mold (8). The bottom of the lower mold (8) is provided with a third T-slot (9), and the lower mold (8) is connected to the support (10) through the third T-slot (9). The lower mold (8) is also symmetrically provided with a right mold (4) and a left mold (5) on both sides. The sides of the right mold (4) and the left mold (5) are connected with a second driving hydraulic cylinder (7). The sides of the right mold (4) and the left mold (5) are provided with a second T-slot (6), and the right mold (4) and the left mold (5) are connected to the second driving hydraulic cylinder (7) through the second T-slot (6). The top of the lower mold (8) is also provided with an upper mold (1). The top of the upper mold (1) is connected with a first driving hydraulic cylinder (3). The top of the upper mold (1) is also provided with a first T-slot (2), and the upper mold (1) is connected to the first driving hydraulic cylinder (3) through the first T-slot (2).

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