Shearing and pressing anti-inversion extrusion die

Abstract

The utility model discloses a kind of shear pressure remains anti-inversion extrusion dies, including die body, extrusion cavity is sequentially arranged on the die body, work zone and first die hole, characterized by, extrusion cavity side is provided with anti-inversion groove.The utility model does not take out aluminum alloy in die when pressure remains shearing, cannot form blowhole in die cavity, can reduce or avoid the problem that bubble appears on the surface of aluminum alloy bar after quenching, improve bar quality.

Description

Technical Field

[0001] This utility model relates to a mold, and more particularly to a shearing and compression prevention mold. Background Technology

[0002] 6061 aluminum alloy is a typical heat-treatable hard aluminum alloy. Its extruded bars have high strength and are widely used in aerospace and other fields. Our company's extruded 6061 aluminum alloy bars, after quenching in a vertical quenching furnace, exhibit a large number of bubbles with a diameter of 1-5mm on the surface. These bubbles are mostly present at the beginning, with almost none in the middle and end. This defect seriously affects the quality of the bars.

[0003] The aluminum alloy bar extrusion die includes a die body, on which an extrusion cavity, a working zone, and a first die hole are sequentially arranged. Extruded bar bubbles are classified into three types: inclusion bubbles, extrusion stratification bubbles, and gas-permeable bubbles. Analysis revealed that during the extrusion process, residual shearing carries aluminum alloy out of the die, forming pores within the die cavity, which flow out with the product during extrusion. Utility Model Content

[0004] The purpose of this invention is to provide a shearing and compression anti-backward extrusion mold to reduce or avoid the problem of air bubbles appearing on the surface of aluminum alloy bars after quenching, thereby improving the quality of the bars.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a shearing and compression anti-backflow extrusion mold, comprising a mold body, wherein an extrusion cavity, a working belt and a first mold hole are sequentially arranged on the mold body, characterized in that an anti-backflow groove is provided on one side of the extrusion cavity.

[0006] Furthermore, the anti-tipping groove has a U-shaped cross-section.

[0007] Furthermore, the extrusion cavity has an arc-shaped inlet.

[0008] Compared with the prior art, the present invention has the following advantages: the present invention will not carry out the aluminum alloy in the mold during the residual shearing, and will not form air holes in the mold cavity, which can reduce or avoid the problem of air bubbles on the surface of the aluminum alloy bar after quenching, and improve the quality of the bar. Attached Figure Description

[0009] Figure 1 This is a cross-sectional view of a shearing die to prevent backflow and extrusion.

[0010] Figure 2 This is an example of a closed-loop structure.

[0011] Explanation of reference numerals in the attached drawings: 1. Mold body, 2. Extrusion cavity, 3. Working zone, 4. First mold hole, 5. Anti-tipping groove. Detailed Implementation Example

[0012] See Figure 1 A shearing and compression anti-backflow extrusion mold includes a mold body 1, on which an extrusion cavity 2, a working belt 3 and a first mold hole 4 are sequentially arranged, and an anti-backflow groove 5 is provided on one side of the extrusion cavity 2.

[0013] In this embodiment, the anti-tipping groove 5 has a U-shaped cross-section.

[0014] In this embodiment, the extrusion cavity 2 has an arc-shaped inlet.

[0015] Because an anti-backflow groove is set in the extrusion cavity, the aluminum alloy will not be carried out during shearing and pressing, and pores will not form in the mold cavity. This can reduce or avoid the problem of bubbles appearing on the surface of the aluminum alloy bar after quenching, thus improving the quality of the bar. Example

[0016] The difference between this embodiment and Embodiment 1 is that, see Figure 2 The anti-tipping groove of the shearing and compression mold is equipped with sealing rings 61 made of rubber material at 5 locations. A support rod is installed inside the sealing ring 61, and the support rod has a first pipe section 62 with internal threads. The first pipe section 62 is threadedly connected to a second pipe section 63. When not in use, the sealing rings are positioned at the anti-tipping grooves for protection, and the sealing rings are stably installed by adjusting the support rods for additional support.

[0017] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above-described embodiments. All technical solutions that fall within the principles of this utility model are within its protection scope. For those skilled in the art, any improvements made without departing from the principles of this utility model should also be considered within its protection scope.

Claims

1. A shearing and compression anti-backward extrusion mold, comprising a mold body (1), wherein an extrusion cavity (2), a working belt (3), and a first mold hole (4) are sequentially arranged on the mold body (1), characterized in that, An anti-tipping groove (5) is provided on one side of the extrusion cavity (2); the anti-tipping groove (5) has a U-shaped cross section, and the extrusion cavity (2) has an arc-shaped inlet; a sealing ring made of rubber material is provided at the anti-tipping groove, and a support rod is provided inside the sealing ring. The support rod has a first pipe section, and the first pipe section has an internal thread. The first pipe section is threadedly connected to the second pipe section.

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