Zinc alloy product manufacturing process and zinc alloy product

Abstract

The invention provides a zinc alloy product manufacturing process and a zinc alloy product, and relates to the technical field of zinc alloy pipe manufacturing processes. Comprising the following steps that S1, a zinc alloy plate strip is placed on a forming mold to be formed into a zinc alloy part in a corresponding shape in a cold machining plastic forming mode; and S2, a seam formed by the zinc alloy part is welded. According to the scheme, one-time forming of the zinc alloy product can be achieved, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of zinc alloy pipe manufacturing technology, and in particular to a zinc alloy product manufacturing technology and a zinc alloy product. Background Art

[0002] Zinc alloy is a nonferrous alloy material produced by adding other elements to zinc as the matrix. Low-priced zinc alloy can replace copper alloy and stainless steel and is widely used in bathroom, mechanical connection, electronic communication, home appliances, construction, stationery, plumbing, automobile, hardware, decoration and other fields. At present, zinc alloy is mainly used for various products through casting, but there are few reports on zinc alloy products and products processed by zinc alloy products due to technical limitations.

[0003] CN110788571A discloses a method for manufacturing ultra-thin-wall H65 copper-zinc alloy oval tubes by high-frequency induction welding. H65 alloy is a brass alloy with high strength and plasticity, good resistance to cold and hot pressure processing, good mechanical properties, good plasticity in hot state, good machinability, and easy welding. Like stainless steel, copper alloy and stainless steel both have good ductility. Therefore, in the conventional thinking, the tube rolling process can be conveniently carried out for copper-based alloys and stainless steel, while conventional zinc alloy materials have poor ductility compared to copper alloys and stainless steel, so the tube rolling process is generally not used to manufacture zinc alloy products; some zinc alloys in existing materials also have improved ductility due to the addition of different components, but due to the limitations of alloy material research and development and key welding technologies, it is generally not thought of directly using zinc alloys to roll tubes to obtain zinc alloy products, resulting in the manufacturing cost of zinc alloy tubes being still relatively high.

[0004] In recent years, with the development of materials and process technology, zinc and zinc alloy plates, strips, rods and wires can be produced by rolling, hot extrusion and drawing, and have been widely used in battery shells, anode plates, printing plates and computer, printer parts, communications, bridges, highway guardrails, shipbuilding and other technical fields. However, zinc alloy tubes are mostly extruded or cast, and the cost of zinc alloy tubes is high due to complex processes, high energy consumption, high equipment and mold costs, so they are not widely used. Summary of the invention

[0005] The present invention directly uses deformed zinc alloy plates and strips to form zinc alloy tubes, and directly welds them online to form zinc alloy tubes. The tubes are continuously formed and sawn according to predetermined lengths, which reduces production costs. The tubes can be used in construction, machinery, transportation, instrumentation, sanitary hardware and other industries, and have great competitive advantages.

[0006] The present invention discloses a zinc alloy product manufacturing process, which overcomes industry prejudice and adopts a cold working plastic deformation method, specifically forming the zinc alloy plate strip into a tubular or arc shape by rolling or stamping, and welding it into a welded pipe when necessary to reduce production costs and improve production efficiency.

[0007] The present invention adopts the following scheme:

[0008] A zinc alloy product manufacturing process comprises the following steps:

[0009] S1. placing the zinc alloy sheet strip on a forming die and forming it into a zinc alloy part of a corresponding shape by cold working plastic forming;

[0010] S2. Welding the joints formed by the zinc alloy parts.

[0011] Furthermore, in S1, the zinc alloy sheet strip is rolled on a forming die to form a zinc alloy part of a corresponding shape.

[0012] Furthermore, in step S1, when the zinc alloy part is formed by curling, the forming die forms a preset hole shape, and the zinc alloy sheet strip is suitable for being bent and curled into a zinc alloy part of a corresponding shape after passing through the forming die.

[0013] Furthermore, in S1, the zinc alloy sheet strip is stamped on a forming die to form a zinc alloy part of a corresponding shape.

[0014] Furthermore, the zinc alloy strip comprises at least 0.05%-2.5% copper, 0.05%-0.3% titanium and 96%-99% zinc by mass fraction.

[0015] Furthermore, the zinc alloy sheet and strip comprises at least 0.05%-2.5% copper, 0.05%-0.3% titanium, ≤0.25% lead, ≤0.2% magnesium, ≤0.3% aluminum, and the remainder is zinc.

[0016] Furthermore, the forming dies are provided with several groups so as to gradually roll the zinc alloy sheet strip into the required zinc alloy parts.

[0017] Furthermore, the zinc alloy product is formed into a tubular shape and has only one weld seam.

[0018] Furthermore, during welding, the welding temperature of the zinc alloy product is 230-260°C.

[0019] The present invention also provides a zinc alloy product, which is manufactured by the zinc alloy product manufacturing process.

[0020] Beneficial effects:

[0021] This solution uses cold processing plastic deformation of zinc alloy strips, specifically forming by rolling or stamping, cutting into zinc alloy strips of different widths as needed, and then forming into zinc alloy parts, and welding the seams, which greatly reduces material costs and welding costs, and is also beneficial to subsequent surface treatment. Through this solution, zinc alloy products are manufactured using a molding method similar to stainless steel pipes, which can reduce material costs, overcome technical prejudices, and use zinc alloy strips to directly roll or stamp into zinc alloy pipes, enriching the process methods for manufacturing zinc alloy pipes. DETAILED DESCRIPTION

[0022] Example 1

[0023] A zinc alloy product manufacturing process comprises the following steps:

[0024] S1. placing the zinc alloy sheet strip on a forming die and forming it into a zinc alloy part of a corresponding shape by cold working plastic forming;

[0025] S2. Welding the joints formed by the zinc alloy parts.

[0026] In this embodiment, the corresponding shape refers to the shape defined by the forming die. The composition of the zinc alloy strip includes at least 0.05%-2.5% copper, 0.05%-0.3% titanium and 96%-99% zinc by mass fraction. In a preferred embodiment, the zinc alloy strip includes at least 0.05%-2.5% copper, 0.05%-0.3% titanium, ≤0.25% lead, ≤0.2% magnesium, ≤0.3% aluminum, and the balance is zinc. The zinc alloy strip is manufactured by smelting, and can be manufactured by rolling or extrusion. The zinc alloy strip manufactured by the above ratio has good ductility and is suitable for applications in the fields of bathroom, construction, etc. Preferably, the mass fraction of the zinc alloy strip includes 0.1%-0.4% copper, 0.05%-0.3% titanium, 0.1%-0.25% lead, 0.1%-0.2% magnesium, and 0.1%-0.3% aluminum. In a specific embodiment, the mass fraction of the zinc alloy strip is 0.3% copper, 0.2% titanium, 0.2% lead, 0.1% magnesium, 0.2% aluminum, and 99% zinc. The zinc alloy strip manufactured under this composition has good ductility. Under this mass fraction, the elongation of the zinc alloy strip in the longitudinal direction can reach 54%, the tensile strength exceeds 297.9MPa, and the melting point reaches 420°C. The maximum elongation of the copper alloy strip formed by rolling is only 35%.

[0027] In another embodiment, a welding device is provided at the downstream end of the forming die to weld the joints of the zinc alloy parts. The welding device may be argon arc welding, laser welding, brazing welding, friction stir welding, etc., including but not limited to these. In a preferred embodiment, during welding, the welding temperature of the zinc alloy product is 230-260°C, for example, by reflow soldering, etc., the temperature range is less than the melting point of the zinc alloy part, and welding at this temperature will not cause damage to the surface of the zinc alloy part, and prevent deformation caused by the temperature approaching the melting point of the zinc alloy part; at the same time, welding below 300°C can prevent the formation of coarse crystals that reduce performance or corrosion. It should be noted that during the welding process, the opposite sides of the zinc alloy parts need to be maintained so that the joints remain in contact to improve the welding quality. Cooling should be carried out in time after welding, and cooling can be achieved by spraying water.

[0028] In this embodiment, the cold working plastic forming method may be curling, stamping, etc. Through this embodiment, the zinc alloy sheet strip is directly used to form the zinc alloy part, so as to overcome the prior art prejudice and reduce the production cost of the zinc alloy part.

[0029] Example 2

[0030] This embodiment discloses a manufacturing process for preparing a zinc alloy product by curling, comprising the following steps:

[0031] S1. Place the zinc alloy strip on the pipe making equipment and drive the zinc alloy strip to move toward the forming die;

[0032] S2, the zinc alloy strip is curled on a forming die to form a zinc alloy part of a corresponding shape;

[0033] S3. Welding the joints of the zinc alloy parts;

[0034] S4. After welding is completed, cutting and blanking are performed according to the predetermined length.

[0035] When the zinc alloy part is formed by curling, the forming die forms a preset hole type, and the zinc alloy strip is suitable for bending into a zinc alloy tube body of a corresponding shape after passing through the forming die, and then welding, so that the zinc alloy tube body has and only has one weld. Specifically, the zinc alloy strip can be rolled into a material roll, and one end of it is pulled to the pipe making equipment, which includes a guide device, a plurality of forming dies, a welding device, a cutting device and a blanking assembly, wherein the forming die is provided with a plurality of groups to gradually roll the zinc alloy strip into the required zinc alloy part. Several forming dies are arranged in a straight line, and the hole type formed by the forming die along the direction of movement of the zinc alloy strip gradually tends to a preset shape, so that the zinc alloy strip can be gradually rolled into the required tubular shape. The tubular shape here can be a round tube, an elliptical tube, a square tube, etc., and the outer side of the zinc alloy strip is squeezed by the forming die so that the zinc alloy strip is rolled inward into a tubular shape. The forming die can refer to the existing flat roller die and vertical roller die, and four or more flat roller dies and vertical roller dies are used to surround the required hole type.

[0036] In one embodiment, step S5 is further included: shaping is performed according to the desired shape after welding is completed, so that the zinc alloy product forms the desired special-shaped shape. During shaping, a shaping mold arranged at the rear end of the welding device can be used. The shaping mold can be formed into a desired hole shape by a flat roller mold and a vertical roller mold, so as to extrude and shape the zinc alloy product to obtain a zinc alloy product of the desired shape.

[0037] After welding is completed, the zinc alloy product is cut according to the preset length. Laser cutting is used when cutting the zinc alloy product, which can improve welding efficiency and reduce heat waste.

[0038] Example 3

[0039] This embodiment discloses a manufacturing process for preparing a zinc alloy product by stamping, comprising the following steps:

[0040] S1. Placing the zinc alloy sheet strip on a stamping die and stamping it according to the required shape to form a tubular or arc-shaped zinc alloy part;

[0041] S2. Weld the joints of two or more zinc alloy parts.

[0042] In this embodiment, different stamping dies can be used to form zinc alloy parts of corresponding shapes. The shape of the zinc alloy parts can be tubular or arc-shaped, so that multiple arc-shaped workpieces can be spliced ​​and then welded.

[0043] Example 4

[0044] The present invention also provides a zinc alloy product, which is manufactured by the zinc alloy product manufacturing process. By forming the zinc alloy strip by rolling or stamping, cutting it into zinc alloy strips of different widths as needed, rolling or stamping it into zinc alloy parts, and welding the seams, the material cost and welding cost are greatly reduced, the strength of the welded pipe product is guaranteed, and it is also beneficial to the subsequent surface treatment. Through this solution, the zinc alloy product is manufactured by a molding method similar to that of stainless steel pipes, which overcomes technical prejudice and can reduce material costs. The zinc alloy product manufactured by the embodiment of the present invention can be used in the field of sanitary ware, such as faucet bodies, elbows, etc.; it can also be used in the fields of construction, mechanical equipment, etc., and is widely used.

[0045] It should be understood that the above are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

Claims

1. A zinc alloy product manufacturing process, characterized in that: The steps include: S1. placing the zinc alloy sheet strip on a forming die and forming it into a zinc alloy part of a corresponding shape by cold working plastic forming; S2. Welding the joints formed by the zinc alloy parts.

2. The zinc alloy product manufacturing process according to claim 1, characterized in that: In S1, the zinc alloy sheet strip is rolled on a forming die to form a zinc alloy piece of a corresponding shape.

3. The zinc alloy product manufacturing process according to claim 2, characterized in that: In step S1, when the zinc alloy part is formed by curling, the forming die forms a preset hole shape, and the zinc alloy sheet strip is suitable for being bent and curled into a zinc alloy part of a corresponding shape after passing through the forming die.

4. The zinc alloy product manufacturing process according to claim 1, characterized in that: In S1, the zinc alloy sheet strip is stamped on a forming die to form a zinc alloy piece of a corresponding shape.

5. The zinc alloy product manufacturing process according to claim 1, characterized in that: The zinc alloy strip comprises at least 0.05%-2.5% copper, 0.05%-0.3% titanium and 96%-99% zinc by mass fraction.

6. The zinc alloy product manufacturing process according to claim 5, characterized in that: The zinc alloy sheet and strip comprises at least 0.05%-2.5% copper, 0.05%-0.3% titanium, ≤0.25% lead, ≤0.2% magnesium, ≤0.3% aluminum, and the balance is zinc.

7. The zinc alloy product manufacturing process according to claim 2, characterized in that: The forming dies are provided in several groups so as to gradually roll the zinc alloy sheet strip into the required zinc alloy parts.

8. The zinc alloy product manufacturing process according to claim 2, characterized in that: The zinc alloy product is formed into a tubular shape and has only one welding seam.

9. The zinc alloy product manufacturing process according to claim 1, characterized in that: When welding, the welding temperature for zinc alloy products is 230-260℃.

10. A zinc alloy product, characterized in that: The zinc alloy product is manufactured by the zinc alloy product manufacturing process described in any one of claims 1 to 9.