CN1203129A

CN1203129A - Method for horizontally continuous casting copper pipes

Info

Publication number: CN1203129A
Application number: CN 97112654
Authority: CN
Inventors: 吴左财
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-06-24
Filing date: 1997-06-24
Publication date: 1998-12-30

Abstract

A horizontal conticasting method of copper tube which is especially suitable to manufacture hollow products with secondary processing such as nut features that molten copper is introduced into the cavity formed by horizontal graphite mould and the crystallized and solidified copper tube is drawn out by drawing mechanism. Said graphite mould is composed of mould core and jacket. Its core consists of conic core body with an alpha included angle between the tangent plane and axis for easy drawing out, where alpha is 0.5-1.5 deg. and a tray. A cooling unit surrounds the mould jacket.

Description

The method of horizontally continuous casting copper pipes

The present invention relates to the method for continuous casting of metal, particularly the method for metal pipe material continuous casting.

Existing copper pipe continuous casting is general to adopt the mode of pulling out that is pulled, and this mode technological operation is easy to control, the product glossiness height, but the one side of shortcoming is that speed of production is slow, and work efficiency is low, to raw material quality requirement height, be not suitable for composition and constitute the copper scrap do not advise, composition brass etc. and reclaim double teeming, so production cost is higher.It is fast that horizontal continuous casting process has speed of production, and material quality is required undemanding characteristics, but this technology only was used to produce solid copper material in the past, as copper rod, do not disclose water horizontal continuous casting production hollow copper material, i.e. copper pipe.When people do nut one series products with this solid copper rod intercept, car go out hollow, when not only having taken a lot of work but also take material.If adopt the hollow material turning processing of certain specification, the province's material that just saves time is many.And the hollow copper material that adopts up-drawing method to produce, then cost is higher.Owing to need through reprocessing, material script fineness there is not specific (special) requirements, many occasions constitute material composition does not have particular requirement yet, like this, just faces a kind of demand, and promptly fineness and composition constitute the lower-cost hollow copper material of no institute specific (special) requirements.The horizontal continuous casting process production that this hollow steel employing resembles the drawing copper rod is desirable, because production cost is lower.Problem is, simply applying mechanically the horizontal casting copper rod is impracticable in conjunction with the technology of continuous up-casting copper pipe, because during the copper pipe horizontal casting, because gravity effect, the core rod pressure and the drawing rub power of continuous casting mould are big, and copper pipe is difficult for being drawn out, and core rod will be broken, and production can't be carried out.

The objective of the invention is to overcome the deficiency of prior art, provide the method for the lower copper pipe of a kind of horizontal casting production cost, i.e. the method for horizontally continuous casting copper pipes.Realize that this method need solve the problem that copper pipe is difficult for being drawn out, core rod is broken easily.

Technical solution of the present invention is molten copper liquid to be introduced the die cavity of graphite mo(u)ld, the mould periphery is provided with cooling device, the copper pipe of crystallisation by cooling is exported through the haulage gear drawing, its special character is molten copper liquid is introduced the die cavity of the graphite mo(u)ld that is made of core rod and die sleeve of axial horizontal setting, its end face of an end that the core body with tapering that the core rod of the graphite mo(u)ld that is adopted is established the chassis and linked with it, core body are distal to the chassis is coupled to the section of an end on chassis less than core body.

In order to be suitable for the horizontal casting of copper pipe, adopt a kind of like this graphite core rod, the tapering of the core body of this core rod is that to make the angle α of the plane that is tangential on the core body perisporium and core body axis be 0 °＜α＜2 °; Preferred α is 0.5 °＜α＜1.5 °.

The method of horizontally continuous casting copper pipes of the present invention owing to take molten copper liquid is introduced the graphite mo(u)ld that is made of core rod and die sleeve of axial horizontal setting, is achieved the horizontal casting of copper pipe; The essence that the copper pipe horizontal casting is achieved is the graphite mo(u)ld that is made of core rod and die sleeve that has adopted a kind of axial horizontal setting; The crux that adopts the graphite mo(u)ld that is made of core rod and die sleeve of this axial horizontal setting that the copper pipe horizontal casting is achieved is the core rod that has adopted a kind of core body with tapering that is provided with the chassis and links with it.Compare with continuous up-casting, horizontal casting core rod institute pressurized and big with the frictional force of copper pipe inwall, if adopt the used core rod of up-drawing method, then copper pipe is difficult for being drawn out, and core rod will be broken, and the copper pipe horizontal casting can not be realized.The present invention adopts core body to have the core rod of tapering, the core body of this core rod is tapered along the copper pipe pull-out direction, like this, copper liquid in die cavity, begin to cool down crystallization and crystallisation by cooling the position, have a gap between copper pipe inwall and the core rod, eliminated the attachment phenomenon of crystallization copper pipe inwall and core surface to greatest extent, drawing rub power between copper pipe and core rod is greatly reduced, help copper pipe and pull out, and keep core rod not broken, the copper pipe horizontal casting is achieved.Compare with continuous up-casting vertically upward, the copper pipe horizontal casting have speed of production fast, to the undemanding characteristics of ingredient requirement, and applicable to the recovery reprocessing of useless composition brass.For making the such series products of nut, the copper pipe that adopts the inventive method to produce is only optimum.Because adopt solid copper bar to make, not only time-consuming but also take material, the copper pipe that adopts up-drawing method to produce is made the cost height.The product that this method is produced, fineness is poorer than up-drawing method, but cost is low; Because will pass through secondary operations, fineness is inessential, there is no need to make this series products with the copper pipe of best bright finish high price.

Below in conjunction with the description of drawings embodiments of the present invention.

Fig. 1 is the method device for carrying out said of horizontally continuous casting copper pipes of the present invention.

The method of embodiment 1 horizontally continuous casting copper pipes, it is the die cavity of the molten copper liquid in the holding furnace 1 being introduced the graphite mo(u)ld that constitutes by core rod 4 and die sleeve 3 of axial horizontal setting, the separate space that is copper liquid through between the ring-type that the through hole 2 of die sleeve 3 flows between die sleeves and core rod, the core body with tapering 9 that the graphite core rod 4 that is adopted is established chassis 8 and linked with it, this tapering is that core body 9 is tapered along the copper pipe pull-out directions, and this tapering of core body 9 is that to make the angle α of the plane that is tangential on core body 9 and core body axis be 0 °＜α＜2 °; Preferred α is 0.5 °＜α＜1.5 °; Also can offer through hole and be used to introduce copper liquid on the chassis 8 of core rod; The periphery that is positioned at the outer die sleeve of holding furnace is provided with coolant jacket 5, through-flow cooling water makes in the die cavity copper liquid cool off crystallization then gradually in the copper pipe pull-out direction to solidify in it, and the copper pipe 6 that has solidified is exported through haulage gear 7 drawings.To control pitch during drawing well.Drawing pitch of the present invention should be less than the drawing pitch of solid copper bar, and the drawing frequency is improved certainly.With regard to copper pipe itself, than big caliber, the pitch that caliber is little can be more greatly; The thin-walled that compares, the pitch of wall thickness should be littler, and pulling rate should be more slowly.

Claims

1, the method for horizontally continuous casting copper pipes, molten copper liquid is introduced the die cavity of graphite mo(u)ld, the mould periphery is provided with cooling device, the copper pipe of crystallisation by cooling is exported through the haulage gear drawing, it is characterized in that, molten copper liquid is introduced the die cavity of the graphite mo(u)ld that is made of core rod (4) and die sleeve (3) of axial horizontal setting, and the core rod of the graphite mo(u)ld that is adopted (4) establishes chassis (8) and the core body with tapering (9) that links with it, its end face of an end that core body (9) is distal to chassis (8) are coupled to the section of an end on chassis (8) less than core body (9).

2, the method for horizontally continuous casting copper pipes as claimed in claim 1 is characterized in that, the tapering of its core body of core rod of the graphite mo(u)ld that is adopted is that to make the angle α of the plane that is tangential on the core body perisporium and core body axis be 0 °＜α＜2 °.

3, the method for horizontally continuous casting copper pipes as claimed in claim 1 is characterized in that, the tapering of its core body of core rod of the graphite mo(u)ld that is adopted is that to make the angle α of the plane that is tangential on the core body perisporium and core body axis be 0.5 °＜α＜1.5 °.