Method for manufacturing aluminum sheet circle blank for cold extrusion by aluminum rod

Abstract

The invention relates to the technical field of manufacturing of an aluminum sheet circle, in particular to a method for manufacturing an aluminum sheet circle blank for cold extrusion by an aluminum rod. The method comprises the following steps of: (1) selecting the aluminum rod serving as the raw material; (2) carrying out axial cold deformation on the aluminum rod; (3) carrying out secondary axial cold deformation by a cold header or an automatic splitting punching machine, so that a crystal structure and a displacement direction, which are generated by extrusion, can be matched with the crystal structure and the displacement direction of the product, which are required when the product is applied to a cold extrusion aluminum tube or aluminum tank production process; (4) processing a wagon chamfer angle of a cold heading blank; (5) carrying out annealing processing, wherein commonly, a temperature is selected in the range of 460 DEG C to 520 DEG C and the constant temperature time is selected in the range of 3 to 8 hours; (6) carrying out surface processing, so that the aluminum sheet circle has better lubricant adhesive ability; and (7) packaging a finished product. Due to the adoption of the method, the production cost of the aluminum sheet circle is greatly reduced, the return times are reduced, the yield is improved and the product obtains the maximum elongation by axial cold deformation for twice.

Description

[technical field] [0001] The invention relates to the technical field of manufacturing aluminum discs, in particular to a method for manufacturing aluminum disc blanks for cold extrusion from aluminum rods. [Background technique] [0002] Aluminum discs can generally be divided into two categories: soft aluminum tubes and hard aluminum cans. Generally, tubes with a wall thickness of less than 0.10mm are called hoses (such as toothpaste tubes, glue tubes, medical ointment tubes, Shoe polish tubes, etc.); those whose wall thickness is above 0.30 mm are called hard aluminum tubes (such as mascara tubes, marker pen tubes, cosmetic lipstick tubes, capacitor tubes, pesticide tubes, mousse tubes, aerosol cans, etc.). [0003] The traditional aluminum wafer manufacturing method is divided into the following two situations: [0004] A. Calender punching method, its manufacturing process is: raw material (aluminum ingot or other recycled materials) → melting → ingot casting → hot rol...

AI Technical Summary

Problems solved by technology

[0008] Even if the extrusion punching method is adopted, the repeated heating of the aluminum rod is unfavorable to the manufacturing cost. Although the crystallization recovery of the sheet after overheating and extrusion has avoided the plate weaving structure, due to the characteristics of the process, it is impossible to obtain a large volume of high-quality aluminum , thus affecting the yield

[0009] Domestic patent 200510122626.0 discloses a method for processing aluminum discs. However, according to the use characteristics of aluminum discs, the main technical bottleneck of the aluminum rod slitting and cold heading method is how to deal with and repair the round heads of aluminum discs. It is at an angle with R, and the patent does not make any repairs to defects such as fractured layers, roll-ups, and burrs during cutting and cold heading. This technology cannot be well applied to the field of "cold extrusion tubes and cans" of aluminum wafers. , Secondly, due to the thicker wall thickness of hard aluminum tubes and tanks, relatively speaking, the deformation of aluminum discs is small, and surface defects of cold-extruded aluminum tubes and tanks are prone to appear. When the rubber band is stretched (greater the deformation), its scars will be less obvious, but the elongation rate must be far less than that of the intact rubber band.

From the above situation, it can be analyzed that the manufacturing method of "Shazhou Staff College" has lower defects in aluminum hose products with large deformation than hard aluminum can products; The lesions (no R-angle deformation treatment, no round-head wagon, no chamfering treatment, no surface treatment, etc.) will be hidden or appear as attached Figure 4 , 9 10. For unqualified products in 10, due to the existence of recessive aluminum disc defects in the hose, there will also be extrusion damage when the toothpaste or medicinal hose is used, and water leakage of the glue pipe; and it has not been annealed. The product cannot be used in the production of cold extruded aluminum discs due to the characteristics of early work hardening and extremely low plasticity.

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