Double-angle guide type extrusion split die

Abstract

The utility model relates to aluminium alloy extrusion die technical field, specifically disclose a double angle diversion type extrusion shunt die, the die adopts two piece type integrated structure to replace traditional diversion board, upper die and lower die three piece set design, in the upper die integration 40 DEG first expansion area and 33.74 DEG secondary expansion area, wherein 33.74 DEG, the shunt bridge bottom is provided 26 DEG welding inverted bridge and limits the transition fillet, the top configuration through type keyway and the symmetric distribution's hoisting screw hole, the lower die welding chamber depth is reduced to 80% of traditional structure. Through actual measurement, the design makes the upper die thickness reduce 25%, extrusion pressure reduces 17%, the discharge rate promotes 50%, thoroughly solves the problem of the uneven flow and the cost is too high in the extrusion of the super large section aluminium profile.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy profile extrusion molding technology, and is particularly applicable to the design of diversion extrusion dies for ultra-large cross-section aluminum profiles. Background Technology

[0002] The current extrusion of ultra-large aluminum rods generally adopts a three-piece structure of guide plate + upper die + lower die, which has significant defects:

[0003] Upper mold thickness increased: To accommodate the flow guiding structure, the upper mold thickness is increased by 30%-50%;

[0004] High pressure, low speed: Extrusion pressure is increased by 15%-25%, and speed is reduced by 20%-35%;

[0005] Shortened lifespan: Stress concentration in the welding chamber leads to premature cracking and failure of the mold;

[0006] High cost: Processing multiple parts increases manufacturing costs by 40%-60%. Utility Model Content

[0007] The purpose of this utility model is to provide a dual-angle guiding extrusion and diversion mold in order to solve the above-mentioned technical problems.

[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0009] This utility model proposes a dual-angle guiding extrusion and diversion die, including an upper die and a lower die. The upper die includes a 40° primary extension zone and a 33.74° secondary extension zone.

[0010] The top of the upper mold is provided with a through-type positioning keyway;

[0011] The bottom of the upper mold diversion bridge is provided with a welding chamfer, which has an inclination angle of 26°.

[0012] As a preferred technical solution of this utility model, the depth H1 of the primary expansion region and the depth H2 of the secondary expansion region satisfy: 1.2≤H1 / H2≤1.5.

[0013] As a preferred technical solution of this utility model, the upper mold is provided with a lifting ring, and the lifting screw hole is a standard M18-M24 thread with a depth >20mm.

[0014] As a preferred embodiment of this utility model, the welded inverted bridge length L and the diversion bridge width W satisfy: 0.3≤L / W≤0.4.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. Dual-angle expansion technology significantly reduces metal flow shear stress by 18.7% and increases extrusion speed to 1.8m / min;

[0017] 2. The two-piece structure replaces the three-piece set, directly reducing mold material costs by 40% and reducing the thickness of the upper mold by 25%; Attached Figure Description

[0018] Fig. 1 This is the outline drawing of the splitter module assembly;

[0019] Fig. 2 This is the main diagram of the split-flow module;

[0020] Fig. 3 This is a cross-sectional view of the cavity in the lower model.

[0021] Reference numerals: 1. Upper mold; 2. Lower mold; 11. 40° primary extension zone; 12. 33.74° secondary extension zone; 13. Welded bridge; 14. Positioning keyway; 15. Lifting ring.

[0022] like Figs. 1 to 3 As shown, this utility model proposes: a dual-angle guiding extrusion diversion die, including an upper die and a lower die, the upper die including a 40° primary extension zone and a 33.74° secondary extension zone;

[0023] The top of the upper mold is provided with a through-type positioning keyway;

[0024] The bottom of the upper mold diversion bridge is provided with a welding chamfer, which has an inclination angle of 26°.

[0025] The depth H1 of the primary expansion region and the depth H2 of the secondary expansion region satisfy: 1.2≤H1 / H2≤1.5.

[0026] The upper mold is equipped with a lifting ring, and the lifting screw hole is a standard M18-M24 thread with a depth >20mm.

[0027] Wherein, the welded inverted bridge length L and the diversion bridge width W satisfy: 0.3≤L / W≤0.4.

[0028] Working principle:

[0029] The metal flow achieves initial acceleration and diffusion in the 40° primary expansion zone, and then completes turbulence suppression and radial uniform distribution with minimal shear stress in the 33.74° secondary expansion zone. The metal flow is guided to turn smoothly through the 26° welding bridge, and fully fused in the welding chamber with optimized compression ratio. The top keyway and lifting hole ensure zero offset positioning of the mold, and finally achieve high-pressure uniform flow, efficient welding and stable extrusion, achieving a synergistic effect of "low pressure-high speed-high quality". Detailed Implementation Example 1

[0030] The upper die, with a diameter of φ800mm, is manufactured using H13 die steel. First, a 40° primary expansion zone is machined, followed by a 33.74° secondary expansion zone cut in a stepped manner. The bottom of the flow divider bridge is formed with an R5 ball end mill to create a 26° welded inverted bridge. A 60mm wide × 28mm deep keyway and M20 lifting screw holes on both sides are milled on the top. Combined with a lower die welding chamber with a 20% reduction in depth, the actual measured extrusion pressure of 6082 aluminum alloy profiles is 618MPa, the extrusion speed is 1.8m / min, the service life is 80 tons, and the wall thickness difference is controlled within 3.2%. The overall efficiency is improved by 58% compared to traditional dies.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dual-angle flow-guiding extrusion and diversion die, characterized in that: It includes an upper mold (1) and a lower mold (2). The upper mold (1) includes a 40° primary stretching zone (11) and a 33.74° secondary stretching zone (12). The top of the upper mold (1) is provided with a through-type positioning keyway (14). The upper mold (1) is provided with a 26° welded inverted bridge (13), and the inverted bridge transition radius R≥5mm.

2. The dual-angle guiding extrusion and diversion die according to claim 1, characterized in that: The depth H1 of the 40° primary extension zone (11) and the depth H2 of the 33.74° secondary extension zone (12) satisfy: 1.2≤H1 / H2≤1.

5.

3. The dual-angle guiding extrusion and diversion die according to claim 1, characterized in that: The upper mold (1) is provided with a lifting ring (15), and the lifting screw hole is a standard M18-M24 thread with a depth >20mm.

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