Novel valve body profile extrusion die structure

Abstract

The utility model discloses a novel valve body profile extrusion die structure. The novel valve body profile extrusion die structure comprises a first step, a second step and a groove which are sequentially arranged from top to bottom, the first step is a feeding port, the height of the first step is 20 mm, the angle of the first step is 9.93 degrees, and the inverted arc R is 4 mm; the height of the second step is 8 mm, the angle of the second step is 9.92 degrees, and the inverted arc R is 2 mm; the second step comprises a flow choking face located on the upper portion, a working belt is arranged below the flow choking face, and the width of the working belt is 3 mm. An inverted arc is arranged at the junction of the groove and the second step, and the inverted arc R is equal to 0.5 mm; the width of the groove is 2.32 mm, and the height of the groove is 8 mm. According to the utility model, the width of a working belt is shortened, the friction force between a high-temperature aluminum material and the die is reduced, the single extrusion amount of the die is greatly improved, the service life of the die is prolonged, the surface roughness can meet the requirements of customers, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum and aluminum alloy production, and more specifically to a novel valve body profile extrusion die structure. Background Art

[0002] To reduce machining costs, automotive valve body manufacturers currently design their products without fully machining the extruded surface. Current product requirements include a smooth extruded surface with no significant extrusion marks, no fuzz, no wiredrawing, and no surface roughness below Ra3.2. This places even higher demands on extrusion mold manufacturers.

[0003] The traditional mold structure has a long flow resistance surface and a wide working bandwidth at the front feed position. Figure 2 As shown, the flow blocking surface is 10*5 degrees and is formed of flat surfaces arranged in a stepped pattern. The working band is 6mm wide, and the feed and discharge ports are also formed of flat surfaces arranged in a stepped pattern. This die structure results in significant shear deformation and frictional resistance between the metal and the die at the flow blocking surface and working band during extrusion. As the number of extrusion sections increases, aluminum adhesion to these two surfaces increases. As a result, after 7-10 sections of extruded rods, the product surface is prone to appearance defects such as wire drawing, peeling, and graininess. This fails to meet customer surface requirements, leading to frequent die pulling, resulting in low production efficiency and yield.

[0004] Therefore, a new valve body profile extrusion die structure is urgently needed. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a novel valve body profile extrusion die structure to solve the problems in the background technology.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0007] A new valve body profile extrusion die structure includes a first step, a second step and a groove arranged in sequence from top to bottom and coated with aluminum oxide; the first step is a feed port, the height of the first step is 20 mm, the angle is 9.93°, and the inverted arc R=4 mm; the height of the second step is 8 mm, the angle is 9.92°, and the inverted arc R=2 mm; the second step includes a flow-blocking surface located above, and a working zone is below the flow-blocking surface, and the width of the working zone is 3 mm; an inverted arc is set at the junction of the groove and the second step, and the inverted arc R=0.5 mm; the width of the groove is 2.32 mm, and the height of the groove is 8 mm.

[0008] Further optimizing the technical solution, the length of the flow-blocking surface is 5 mm.

[0009] Further optimizing the technical solution, the total height of the second step and the groove is 16 mm.

[0010] The technical solution is further optimized, and the width of the obstruction angle formed by the obstruction surface and the mold axis and the intersection with the bottom surface of the feed cavity is 0.87 mm.

[0011] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is as follows.

[0012] This utility model provides a novel valve body profile extrusion die structure. The feed port is modified to a small arc transition feed port, reducing the severe shear deformation and frictional resistance between the metal and the die during the extrusion process. The inclined length of the feed flow resistance surface is shortened to 5mm, and the working band width is shortened to 3mm. This reduces the resistance between the metal and the die extrusion surface during the extrusion process, reduces the occurrence of aluminum sticking, and makes the extruded surface less susceptible to wiredrawing, hair picking, and the generation of hair particles. This shortened working band width reduces the friction between high-temperature aluminum and the die, significantly increasing the single die extrusion output, extending the die's service life, ensuring that the surface roughness meets customer requirements, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a structural schematic diagram of an existing extrusion die;

[0015] Among them: 1. flow blocking surface, 2. working belt, 3. groove, 4. feed port, 5. first step, 6. second step. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] A new valve body profile extrusion die structure, combined with Figures 1 to 2 As shown, it includes a first step 5, a second step 6, and a groove 3; the second step 6 includes a flow-blocking surface 1 and a working zone 2.

[0018] The first step 5 , the second step 6 and the groove 3 are arranged in sequence from top to bottom, and the working surfaces of the first step 5 , the second step 6 and the groove 3 are provided with an aluminum oxide coating.

[0019] The first step 5 is the feed port 4 , the height of the first step 5 is 20 mm, the angle is 9.93°, and the inverted arc R=4 mm.

[0020] The second step 6 is 8mm high, with an angle of 9.92° and a chamfer radius of 2mm. The second step 6 includes an upper baffle 1, whose inclined length is reduced to 5mm. The obstruction angle formed by the baffle with the die axis and the width of the feed cavity bottom is 0.87mm. Below the baffle 1 is a working zone 2, which is 3mm wide. This reduced working zone width reduces the resistance between the metal and the die extrusion surface during the extrusion process, thereby reducing the occurrence of aluminum sticking.

[0021] A chamfered arc is provided at the junction of the groove 3 and the second step 6, and the chamfered arc R = 0.5 mm. The width of the groove 3 is 2.32 mm, and the height of the groove 3 is 8 mm.

[0022] The total height of the second step 6 and the groove 3 is 16 mm.

[0023] In actual use, the utility model provides a chamfered arc transition feed at the feed port 4 to reduce the strong shear deformation between the metal and the die during the extrusion process. The length of the inclined surface at the feed flow obstruction is shortened to 5mm, and the width of the working zone 2 is shortened to 3mm. This reduces the resistance between the metal and the extrusion surface of the die during the extrusion process, reduces the occurrence of aluminum sticking, and makes the extruded surface less prone to wiredrawing, hair picking, and the generation of hair particles. The single die extrusion volume is greatly increased, which can improve the surface quality of the profile, extend the service life of the die, simplify the process flow, improve production efficiency, and shorten the production cycle.

Claims

1. A new valve body profile extrusion die structure, characterized by: The invention comprises a first step (5), a second step (6) and a groove (3) which are sequentially arranged from top to bottom and provided with an aluminum oxide coating; the first step (5) is a feed port (4), the height of the first step (5) is 20 mm, the angle is 9.93°, and the inverted arc R=4 mm; the height of the second step (6) is 8 mm, the angle is 9.92°, and the inverted arc R=2 mm; the second step (6) comprises a flow-blocking surface (1) located above, and a working zone (2) is provided below the flow-blocking surface (1), and the width of the working zone (2) is 3 mm; an inverted arc is provided at the junction of the groove (3) and the second step (6), and the inverted arc R=0.5 mm; the width of the groove (3) is 2.32 mm, and the height of the groove (3) is 8 mm.

2. The novel valve body profile extrusion die structure according to claim 1 is characterized in that: The length of the flow-blocking surface is 5 mm.

3. The novel valve body profile extrusion die structure according to claim 2 is characterized in that: The total height of the second step (6) and the groove (3) is 16 mm.

4. The novel valve body profile extrusion die structure according to claim 3 is characterized in that: The width of the obstruction angle formed by the obstruction surface and the mold axis and the intersection with the bottom surface of the feed cavity is 0.87 mm.

Images