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Impact extrusion forming technology for aluminum alloy water heating parts and products thereof

A technology of cold extrusion and aluminum alloy, applied in the direction of metal extrusion, metal extrusion die, metal extrusion control equipment, etc., can solve the problem that the mechanical properties of the product cannot meet the requirements of use, and the cold extrusion technology cannot be formed well , high product sales prices and other issues, to achieve the effect of excellent mechanical properties, small specific gravity, high yield

Inactive Publication Date: 2008-07-23
宁波炜兴特种铝制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One object of the present invention is to solve the above-mentioned existing die-casting production process, the plumbing parts are prone to produce congenital defects such as pores, trachoma, shrinkage cavity, shrinkage porosity, so that the metal structure is loose, and the mechanical properties of the product cannot meet the use requirements; and because In the die-casting process, limited by the metal fluidity requirements, it is difficult to reduce the wall thickness of the cavity, resulting in heavy workpiece weight, low product yield, high material consumption, high product sales prices, and poor cold extrusion technology. To solve the molding problem, a cold extrusion molding technology is provided, so that cold extrusion can be well formed

Method used

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  • Impact extrusion forming technology for aluminum alloy water heating parts and products thereof
  • Impact extrusion forming technology for aluminum alloy water heating parts and products thereof
  • Impact extrusion forming technology for aluminum alloy water heating parts and products thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0055] Use 6061 (LD30) forged aluminum alloy to make commonly used 15-25 type water meter cover (outer diameter 85mm): according to Figure 1 aluminum alloy plumbing parts cold extrusion molding technology steps, first, refer to the actual parts drawing (as attached Figure 7) Design the profile drawing (as shown in Figure 6); use 6061 (LD30) forged aluminum alloy, which is hot-extruded at 500-520℃ to become a 3.5-meter-long water meter cover sub-profile; and then according to the size of the workpiece (As shown in Figure 7) Take the material, make the weight of the profile 1.3 times the net weight of the product part, and clean it according to conventional techniques; Carry out annealing treatment according to Figure 2: heat to 390°C, keep the temperature for 2 hours, and cool with the furnace to 200 Below ℃, air-cooled from the furnace; zinc stearate is used as lubricant, while rolling and stirring; then cold extrusion molding: cold extrusion with 100T punch, one-time molding proc...

Embodiment 2

[0057] Use 6061-type forged aluminum alloy to make common 32-type plumbing joints: According to the technical steps of cold extrusion forming of aluminum alloy plumbing parts in Figure 1, first, refer to the actual part drawing (as shown in Figures 9, 11, and 13) to design the profile Figure (shown in Figures 8, 10, 12); using 6061 forged aluminum alloy, the plumbing pipe movable joint nut, inner wire and outer wire profile are produced by hot extrusion at 500-520℃, the profile length is 3.5 meters; The size of the workpiece is taken, so that the weight of the profile is 1.3 times the net weight of the product part, and cleaned according to conventional techniques; Annealing treatment according to Figure 2: heating to 390°C, holding for 2 hours, cooling with the furnace, to below 200°C, air cooling out of the furnace; Zinc stearate is used as lubricant, while rolling and stirring; then cold extrusion molding: cold extrusion using 160T punch, using one-time molding process, mold us...

Embodiment 3-7

[0059] According to Figure 1, the technical steps of cold extrusion forming of aluminum alloy plumbing parts:

[0060] 1. Take the raw material whose weight is 1.25-1.3 times of the molded product and extrude it at 500-520℃;

[0061] 2. Carry out cleaning and annealing treatment;

[0062] 3. After adding the lubricant and stirring, it is extruded and formed under the pressure above 160T in a normal temperature environment;

[0063] 4. Raise the temperature to 520-530°C and heat for 3-5 hours and then quench and quench, preferably at a heating temperature of 525°C, and preferably heat for 4 hours; or quench according to the prior art; heat up to 165-175°C and keep for 6-8 hours, Aging treatment;

[0064] 5. After turning into a finished product, heat it up to 150-160℃, keep it for 4-6 hours, perform tempering treatment, and then perform conventional treatments such as polishing the surface.

[0065] The specific technical parameters involved are shown in the following table:

[006...

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Abstract

The invention relates to the water heating equipment field, in particular to a cold extrusion forming technique of an aluminium alloy water heating part and the water heating part product. The invention solves the problems that the existing product which takes the cast iron as the raw material is rough, has poor mechanical performance, low yield strength, and comparatively large brittleness, is easy to be broken during the construction installation and cracked during chilliness, and is not easy to resist the chilliness; furthermore, the product which takes the copper material as the raw material has high price, low mechanical performance and is not easy to resist the chilliness, and the cold extrusion technique of the aluminium alloy material can not be well formed; the detailed method of the invention can be seen in a manual; the product which is produced by the invention has the advantages of excellent mechanical performance, high hardness and tensile strength, high yield strength beyond comparison, comparatively small specific gravity, reducing the weight of the single part, beautiful appearance, no rust, no cracks, resisting the chilliness, long service life, high yield of the aluminium alloy cold extrusion forming product, and low cost of the products.

Description

Technical field [0001] The invention relates to the field of plumbing components, and is a cold extrusion molding technology of aluminum alloy plumbing components and a cold extrusion molding plumbing component product. Background technique [0002] The current situation in my country is: some plumbing parts such as water meter covers are made of cast iron, but cast iron is easy to rust. The mechanical performance test requirements are: Vickers hardness above 98, withstand water pressure above 44Kg, tensile strength 100Mpa (1000Kg) Above, the yield strength is above 100Mpa (1000Kg), the tensile strength and yield strength are both low, it is easy to crack during installation and use, cannot withstand severe cold, has a short service life, and has an unsightly appearance, which is far from satisfying the needs of customers. Claim. Some plumbing components such as plumbing pipe joints are often manufactured with copper materials. Due to the lack of copper resources in my country an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/26B21C31/00B21C25/02C22C21/00C22F1/04F28F9/26
Inventor 张惠训
Owner 宁波炜兴特种铝制品有限公司
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