CN103817164A

CN103817164A - Hot extrusion mold for porous thin-walled aluminum-alloy tube

Info

Publication number: CN103817164A
Application number: CN201410083051.5A
Authority: CN
Inventors: 梁金; 彭俊芳
Original assignee: JIANGSU YATAL ALUMINUM CO Ltd
Current assignee: JIANGSU YATAL ALUMINUM CO Ltd
Priority date: 2014-03-07
Filing date: 2014-03-07
Publication date: 2014-05-28

Abstract

The invention relates to a hot extrusion mold for a porous thin-walled aluminum-alloy tube. The hot extrusion mold comprises an upper mold and a lower mold, wherein a lower mold core is arranged in an inner cavity of the lower mold, and an upper mold core is arranged in an inner cavity of the upper mold. The hot extrusion mold is characterized in that the upper mold core and the upper mold adopt a split structure, and the upper mold core is fixed with the upper mold through a screw in the middle. The upper mold core comprises a core tube, wherein a plurality of forming parts are connected to the outer circumference of the core tube and are connected with the core tube through reinforcing ribs. A cavity between the upper mold core and the lower mold core is a forming surface of the thin wall of the aluminum-alloy tube. With the adoption of the hot extrusion mold structure for the porous thin-walled aluminum-alloy tube, various problems such as complicated technology, larger blank, high manufacturing and producing risk factors and the like of an integral-structured mold during production in the prior art can be solved, particularly for the problems that a core surface deterioration layer cannot be removed completely and effectively, the core section processing precision is lower and product production is abnormal due to the lower core section processing precision, and the like, and mold material consumption is reduced by about 8%-20% simultaneously.

Description

Stephanoporate thin wall aluminium-alloy pipe hot-extrusion mold

Technical field

The present invention relates to a kind of extrusion die, especially a kind of stephanoporate thin wall aluminium-alloy pipe hot-extrusion mold of degree of precision.

Background technology

Coaxial stephanoporate thin wall aluminium-alloy pipe is widely used in the industries such as automobile, electric power, household electrical appliances at present.Its Main Function is the object of shunting the different fluids that require by coaxial aperture.And produce the type aluminium-alloy pipe in batches by the mode of hot extrusion, to reach efficient heat exchange be that current production efficiency is higher, the good mode of quality stability.Can required mould be guarantee normal key point of producing, and the processing of patrix core is the key point of the type Design of Dies, processing.It is that the processing of patrix entirety is (as Fig. 1 that current existing the type aluminum pipe is prepared mould, shown in Fig. 2, 1a is patrix, 2a is counterdie, 3a is lower die model core, patrix 1a and patrix core are overall structure), the core rod preparation work of existing the type aluminum pipe mould mainly comprises: blank is opened slightly, wire hole, line cutting shape chamber, heat treatment, finish turning inside and outside circle, electric spark side is done manual work and is with, electric spark forehand reinforcement, leading flank mill metamorphic layer, leading flank polishing, main shortcoming and technology barrier are repeatedly to utilize electric spark to repeat processing, operation is many, precision is low, in manufacture and use procedure, be unfavorable for maintain and replace, after the loss of work band, must freeze and repeat again processing or scrap more to renew mould, be unfavorable for steady production and cost control.Because of the reason of this technique and structure, it is abnormal that the existence of metamorphic layer also can cause mould abnormal cracking, tube wall fineness deficiency, surperficial wire drawing etc. to produce aborning simultaneously.In addition the also same problem of ubiquity in the production of other similar unitary mould, use procedure.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, a kind of stephanoporate thin wall aluminium-alloy pipe hot-extrusion mold is provided, solve existing integrative-structure mould process complexity, blank is larger, the problems such as manufacture, production risk coefficient height.

According to technical scheme provided by the invention, described stephanoporate thin wall aluminium-alloy pipe hot-extrusion mold, comprises upper die and lower die, and lower mold cavity arranges lower die model core, and upper mold cavity arranges patrix core; It is characterized in that: described patrix core and patrix are split-type structural, patrix core is fixed by screw and the patrix at middle part.

Described patrix core comprises core pipe, and the excircle of core pipe connects multiple forming parts, and forming part is connected with core pipe by reinforcement respectively.

Die cavity between described patrix core and lower die model core is the forming surface of aluminium-alloy pipe thin-walled.

Adopt stephanoporate thin wall aluminium-alloy pipe hot extruding die lamps structure of the present invention can solve the various problems of integrative-structure mould in the time producing in prior art, as larger in complex process, blank, manufacture, production risk coefficient is high, particularly core plan metamorphic layer cannot all effectively be removed, the problems such as machining accuracy production lower and that cause thus in core cross section is abnormal reduce mold materials loss approximately 8% ~ 20% simultaneously.

Accompanying drawing explanation

Fig. 1 is the structural representation of stephanoporate thin wall aluminium-alloy pipe hot-extrusion mold in prior art.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is structural representation of the present invention.

Fig. 4 is the B-B cutaway view of Fig. 3.

The specific embodiment

Below in conjunction with concrete accompanying drawing, the invention will be further described.

As shown in Fig. 3～Fig. 4: as described in stephanoporate thin wall aluminium-alloy pipe hot-extrusion mold comprise patrix 1, counterdie 2, patrix core 3, core pipe 3-1, lower die model core 4, screw 5, die cavity 6, forming part 7, reinforcement 8 etc.

As shown in Figure 3, Figure 4, the present invention includes patrix 1 and counterdie 2, counterdie 2 inner chambers arrange lower die model core 4, and patrix 1 inner chamber arranges patrix core 3, and patrix core 3 is split-type structural with patrix 1, and patrix core 3 is fixing with patrix 1 by the screw 5 at middle part;

Die cavity 6 between described patrix core 3 and lower die model core 4 is the forming surface of aluminium-alloy pipe thin-walled, patrix core 3 comprises core pipe 3-1, the excircle of core pipe 3-1 connects multiple forming parts 7, forming part 7 is connected with core pipe 3-1 by reinforcement 8 respectively, and forming part 7 is respectively used to the moulding of aluminium-alloy pipe endoporus.

Hot-extrusion mold of the present invention has solved mould production in prior art, use cost is high, the technical problem that process stability is limited.Hot-extrusion mold of the present invention adopts split type patrix 1 and patrix core 3 to substitute original overall structure, and patrix core adds technological process corresponding to man-hour and is: blank is opened slightly, wire hole, heat treatment, finish turning inside and outside circle, line cutting section, electric spark forehand reinforcement, front and back sides grind metamorphic layer, front and back sides polishing.Add and make man-hour line cutting processing and the convenient metamorphic layer of removing become possibility.The hot extruding die lamps structure that the present invention adopts can be optimized for line cutting processing by spark machined in prior art by patrix core cross section processing and forming, by originally repeating total hole count-1 of N(N=) inferior spark machined need simultaneously complete that N sub-electrode changes the outfit or the clamping workpiece senior machine tooling of rotation processing (or have), change to ordinary lines cutting off machine clamped one time, processing, improved dimensional accuracy form accuracy, simplified work flow, reduced production cost.And after energy cutting on line machines, carry out the grinding and polishing of part, remove the metamorphic layer that electric spark on surface machining forms, improve the surface smoothness of part.The structure that hot-extrusion mold of the present invention adopts can reduce stock volume, can process separately spare unit by patrix core high for required precision, easy loss simultaneously, is beneficial to the replacing after loss in production or use procedure; Can promote by a relatively large margin the die life of this type of high accuracy tubing preparation process, and can, by changing in time high-quality core print, stablize production control process.

Claims

1. a stephanoporate thin wall aluminium-alloy pipe hot-extrusion mold, comprises patrix (1) and counterdie (2), and counterdie (2) inner chamber arranges lower die model core (4), and patrix (1) inner chamber arranges patrix core (3); It is characterized in that: described patrix core (3) is split-type structural with patrix (1), patrix core (3) is fixing with patrix (1) by the screw (5) at middle part.

2. stephanoporate thin wall aluminium-alloy pipe hot-extrusion mold as claimed in claim 1, it is characterized in that: described patrix core (3) comprises core pipe (3-1), the excircle of core pipe (3-1) connects multiple forming parts (7), and forming part (7) is connected with core pipe (3-1) by reinforcement (8) respectively.

3. stephanoporate thin wall aluminium-alloy pipe hot-extrusion mold as claimed in claim 1, is characterized in that: the forming surface that the die cavity (6) between described patrix core (3) and lower die model core (4) is aluminium-alloy pipe thin-walled.