CN1861288A

CN1861288A - Procedure for processing aluminium alloy products

Info

Publication number: CN1861288A
Application number: CN 200510069447
Authority: CN
Inventors: 徐铭钧
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-05-10
Filing date: 2005-05-10
Publication date: 2006-11-15

Abstract

A process for manufacturing Al-alloy product includes such steps as making Al-alloy plate from basic Al-alloy material, preheating, primary die punching for pre-shaping, annealing, and final die punching.

Description

The procedure for processing of Al-alloy products

Technical field

The present invention is relevant a kind of Al-alloy products process technology that is applied in, refer to especially a kind of mainly produce with impact forging processing operation have accurate size, the relevant processing and manufacturing flow process of the aluminum alloy casing goods of thin portion's configuration and exquisite outward appearance.

Background technology

Press, because 3C Products such as mobile phone, PDA, notebook computer are stressed commodity demands such as light weight, intensity height, anti electromagnetic wave, the existing trend that plastic casing is changed into the light metal shell; Add, environmental consciousness comes back, and in European Union and Japan's recovery decree that legislation enforcement electronics information product is relevant in succession in recent years (for example: European Union's agreement global electronic product need reach 75 percent requirement of reclaiming material in 2006), the light metal of its recovery property can be used to replace the optimal material of plastic cement as shell in the middle of becoming 3C Product.

Therefore the material of common metal material is attached most importance to than plastics, but intensity is higher, if use aluminium, magnesium, metal such as admire is material, can develop light weight, high-intensity goods; Again and since aluminium alloy possess lightweight, thermal diffusivity good, can prevent electromagnetic interference, hardness and plasticity advantages of higher, in the application of each industry, emerge fast already.

Generally speaking, the forming technique of aluminium alloy has technology such as die casting, semisolid moulding, forging, punching press and machine cut, present domestic Al-alloy products shoots out moulding with die casting and semisolid mostly, wherein the processing quality of die cast depends on the flowability of material itself, make the die casting processing procedure high more for the thin more Workpiece shaping difficulty of thickness, the product fraction defective also promotes relatively, causes the follow-up work utmost point labor intensive of studying for a second time courses one has flunked, rebuilding, and then causes cost to improve.

Yet, the development trend of the outer shell product of 3C Product is that thickness is more and more thinner, just the industry status investigation shows at present, with regard to aluminum alloy forged processing procedure, can allow a large amount of distortion of material production via forging, make local thinning of material or thickening, can form the cross section of variation and in order to the position of moulding double-screw bolt and rib, and the surface quality of forged article is very smooth, help the follow-up surface treatment of goods, therefore for the procedure for processing of the outer shell product of aluminium alloy (or magnesium alloy, almag), the forging processing procedure is the value with actual Application and Development; For example, the wrought magnesium alloy MD shell that Japan SONY, Hitachi Metals and Tokyo finish forge worker are developed cooperatively, the part advantage that has had the good and cross section that changes of aforementioned plastic rib portion, but because this magnesium alloy forged workpiece also has mouldability deficiency (for example the joint of shell must be made of in the mode that side direction locks screw), easily deformable, surface of the work also to produce problems such as forging defect.

In addition, it is commercial that fine aluminium is as easy as rolling off a log forges into complicated shape in the temperature range of a broadness, most of aluminium alloy also manifests the character of easy forging, chief reason is that the structure of aluminium alloy is face-centred cubic structure (FCC), have maximum sliding systems, compare with the HCP structure of magnesium alloy, for belonging to the material that is more suitable for forging molding; Yet, when the alloying element addition of aluminium alloy increases rheology intensity is increased, that too high forging temperature causes again easily is overheated, crystal grain is grown up fast, during the problems such as eutectic fusion of crystal boundary, and the forging of aluminium alloy also transfers difficulty to; Wherein, the main solid solution element that aluminium alloy rheological intensity is increased is Cu, Mg, Si etc., and forms the elements such as Cr, Mn, Ti, V, Zr of Jie's metallic particles.

These contain the aluminium alloy of high alloy element, form discontinuous phase in the tissue easily, the flow structure is interrupted, reduce forging property, in the forging deformation process, the intensity of material obviously increases down, institute's applied pressure also increases, and these discontinuous mutual-assistance flows flow uneven homogenize and increase the phenomenon that slight crack (or hole) connects, and obvious with regard to existing aluminium alloy (or magnesium alloy, almag) forges processing procedure, it is to be overcome to still have some problems to have.

Summary of the invention

In view of this, the present invention promptly earlier makes the aluminium alloy plate with aluminum alloy base material, then cooperate the mould of set shape to impose at least one preformed impact forging step the aluminium alloy plate, and last main moulding impact forging step, so promptly can produce have accurate size, the aluminum alloy casing goods of thin portion's configuration and exquisite outward appearance.

Wherein, in the process of preformed impact forging step, Al alloy parts is earlier through preheating, so that softening aluminium alloy plate is forged into the aluminium alloy semi-finished product of the roughly external form of outer shell product, earlier the aluminium alloy semi-finished product are annealed before carrying out main moulding impact forging step follow-up, cooperate the mould of set shape that aluminium is closed the storehouse semi-finished product with heating-up temperature again and impose last main moulding impact forging step, connect thin portion such as portion, segment difference section, left-hand thread portion, double-screw bolt position, rib position configuration in order to the age of a draught animal that constitutes goods a little less than the preformed step.

Certainly, can further cooperate the product requirements selectivity goods of main moulding impact forging step to be imposed following process such as side cut, finishing and colouring handles and promptly finishes all Al-alloy products procedure for processing again.

Description of drawings

Fig. 1 is a processing and manufacturing flow chart of the present invention.

The specific embodiment

For making your auditor know composition of the present invention, and embodiment, cooperate graphic being described as follows now:

The processing method of Al-alloy products of the present invention is metallurgical property and the physical characteristic at aluminum metal (or aluminium alloy), and seeing through at least, twice impact forging forming step is processed into the goods configuration of expection with aluminum alloy materials originally; As for, the procedure for processing of integral Al-alloy 3C shell is to include in regular turn as shown in Figure 1 basically: obtain aluminium alloy plate, at least one preformed impact forging, last main moulding impact forging together, and follow-up optionally steps such as side cut, finishing.

Particularly, be the aluminium alloy plate that earlier aluminum alloy base material is made into en plaque; Again the aluminium alloy plate is made with mode of heating and become softening solid, cooperate the mould of set shape to impose at least one preformed impact forging step simultaneously, softening aluminium alloy plate is forged into the aluminium alloy semi-finished product of the roughly external form of goods, when implementing, for guaranteeing the forging temperature moulding of aluminum alloy materials in regulation, the aluminium alloy plate is adapted at having the interior heating of resistance furnace of forced circulation air and automatic temperature-control most, temperature homogeneity in the stove is had relatively high expectations, forging in addition with mould also needs preheating, makes the flowability that increases metal in order to filling die cavity.

Carry out the main moulding impact forging step and earlier the aluminium alloy semi-finished product are annealed before comforting follow-up, then cooperate the mould of set shape that these aluminium alloy semi-finished product are imposed last main moulding impact forging step with processing temperature again a little less than the preformed step, in order to thin portion configurations such as the snapping portion that forms goods, segment difference section, left-hand thread portion, double-screw bolt position, rib positions, and allow and forge the Al-alloy products of finishing and obtain best hardness.

Certainly, can further cooperate the product requirements selectivity goods of main moulding impact forging step to be imposed following process such as side cut, finishing and colouring handles and promptly finishes all Al-alloy products procedure for processing again; In addition, its colouring step then can be spraying method or anode processing mode.

What deserves to be mentioned is, in mould design,, preferably adopt the double action mould smooth to guarantee the workpiece demoulding if when institute desires the goods of moulding and has the snapping of barb or convex and designs; In addition, be also noted that the lubricated method and the use of lubricant.

As mentioned above, the invention provides Al-alloy products one preferable feasible processing and manufacturing flow process, so offer the application of patent of invention in accordance with the law; Yet, above implementation and graphic shown in, be preferred embodiment of the present invention, be not to limit to the present invention with this, be with, approximate with structure of the present invention, device, feature etc. such as, identical person all should belong to of the present invention founding within purpose and the claim.

Claims

1, a kind of procedure for processing of Al-alloy products is characterized in that: include the following step in regular turn:

(1) obtains the aluminium alloy plate;

(2) at least one preformed impact forging;

(3) form predetermined aluminium alloy semi-finished product;

(4) main moulding impact forging;

(5) cut edge;

(6) finishing;

(7) finish finished product.

2, the procedure for processing of Al-alloy products as claimed in claim 1 wherein further can be again in conjunction with the colouring step after the finishing step.

3, the procedure for processing of Al-alloy products as claimed in claim 1, wherein, this colouring step can be spraying method or anode processing mode.

4, the procedure for processing of Al-alloy products as claimed in claim 1, wherein, the aluminium alloy semi-finished product are annealing in advance before carrying out main moulding impact forging.