CN2736080Y

CN2736080Y - Metal sheet bar mould with low stress

Info

Publication number: CN2736080Y
Application number: CN 200420010720
Authority: CN
Inventors: 朱新文; 张九成; 黄祥云; 吕艳伍; 朱书成; 闫荣浩
Original assignee: LONGCHENG METALLURG MATERIAL G
Current assignee: Henan Longcheng Group Co., Ltd
Priority date: 2004-04-24
Filing date: 2004-04-24
Publication date: 2005-10-26
Anticipated expiration: 2014-04-24

Abstract

The utility model relates to a metal sheet bar mould with low stress, which is composed of a water cooling board copper plate and a water cooling narrow copper plate whose both ends determine the width of the narrow copper plate. The water cooling board copper plate and the narrow copper plate are mutually faced. The casting mouth of the upper part of the board copper plate presents continuous curved shape, the inner surface of the molding inner cavity of the board copper plate is an arc-shaped working face which becomes wide gradually from bottom to top, forming a large casting chamber with a smooth carved surface; the outer surface of the board copper plate is provided with a cooling groove for circulating water, the bottom of the cooling groove for circulating water is designed into a profile modeling arc-shaped working surface which is the same with the arc-shaped working surface of the inner cavity, the distance between the sectional points is the same with the distance between the arc-shaped working surfaces of the inner cavity, which can ensure the cooling uniformity of the crystallizer and makes the crystallizer provided with favorable the thermal conduction performance to work continuously. In the continuous casting of metal plate, the utility model can resolve effectively the stress concentration problem of the billet inflection point and avoid cracks of the metal plate in order to achieve the purposes of improving the production efficiency, ensuring the quality of product and extending the service life of the crystallizer.

Description

Low stress sheet metal billet crystallizer

Technical field:

The utility model belongs to casting technology field, is a kind of low stress sheet metal billet crystallizer for sheet-metal blank continuous casting use.

Background technology:

In technique known, used straight-curved mould is to be converted into vertically wide outside expansion by reasonable curved surface, the big space that made being inserted with of the intrusive mood mouth of a river, and created condition for distortion rationally in all even throwing of heat conduction.But, then cause different cold and hot surface product moments because wide the difference in thickness with leptoprosopy is too big; And between straight line and the arc flex point is arranged, and will cause the base shell inequality of being heated, the excessive throwing stress that caused of distortion of corner part makes the base shell phenomenon occur tearing, thereby cracks simultaneously, and sheet metal is vertically interrupted easily.Like this, not only significantly reduce the service life of crystallizer, and had a strong impact on production and product quality again.

The purpose of this utility model provides a kind of low stress sheet metal billet crystallizer that reduces throwing stress, avoids the slab crackle.

Summary of the invention:

Realize that the technical scheme that the purpose of this utility model is taked is: this crystallizer is made up of the narrow copper plate of wide copper coin of two water-cooleds respect to one another and two ends decision width of plate slab, wide copper coin top casting gate is the full curve shape, the inner surface of its molding cavity is the outside curved working face of broadening gradually from bottom to top, formed and had smooth surface and bigger casting chamber, junction at wide copper coin and narrow copper plate is provided with the casting knuckle, the outer surface of wide copper coin is provided with recirculated water cooling groove, the bottom land of cooling bath is arranged to the profiling cambered surface identical with the inner chamber curved working face, its cross section each point equates with inner chamber curved working face distance, even with the cooling of guaranteeing crystallizer, and make the heat-conductive characteristic of crystallizer good, can work continuously.

The low stress sheet metal billet crystallizer of making according to such scheme, can be in the sheet-metal blank continuous casting, effectively solve steel billet flex point problem of stress concentration, because this crystallizer is heated evenly, stress disperses, and makes the deformation drag of solidifying steel billet littler, not only can solve the vertical disruption of strand effectively, and can avoid sheet-metal blank to crack, enhance productivity, guarantee product quality, increase the crystallizer purpose in service life thereby reach.

Utilize accompanying drawing to further describe embodiment of the present utility model below.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the A-A profile of Fig. 1.

The specific embodiment:

Referring to Fig. 1, Fig. 2, Fig. 3, low stress sheet metal billet crystallizer of the present utility model, narrow copper plate 2 by wide copper coin 1 of two water-cooleds respect to one another and two ends decision width of plate slab is formed, the top casting gate of wide copper coin 1 is the full curve shape, wide copper coin 1 is provided with the casting knuckle with the junction of narrow copper plate 2, the inner surface of its molding cavity is the outside curved working face 1-2 of broadening gradually from bottom to top, formed and had smooth surface and bigger casting chamber, because casting area whole wide face in crystallizer top is smooth curved surface, therefore, avoided slab in motion deformation and contraction process, to produce local stress concentration.Like this, in process of production, can guarantee that any point in crystallizer place suitable for reading moves to exit corresponding points track and is straight line, (being that the strand infinitesimal is a linear running along the throwing direction), complex bend stress and compression have been avoided, and do not have excessive end stream when making the molten metal discharging or wash away sidewall, make it to have bigger flow and higher output.Casting blank shell alternating thermal stress and mechanical stress have also been strengthened simultaneously.Outer surface at wide copper coin 1 is provided with recirculated water cooling groove 3, the bottom land of cooling bath 3 is arranged to the profiling cambered surface 3-1 identical with the inner chamber curved working face, its cross section each point equates with inner chamber curved working face distance, even with the cooling of guaranteeing crystallizer, make the crystallizer heat-conductive characteristic good, can work continuously.Because this crystallizer is heated evenly, stress disperses, and can make the deformation drag of solidifying steel billet littler, thereby solve the vertical disruption of strand effectively.

Claims

1, a kind of low stress sheet metal billet crystallizer, narrow copper plate [2] by wide copper coins of two water-cooleds respect to one another [1] and two ends decision width of plate slab is formed, it is characterized in that: the top casting gate of wide copper coin [1] is the full curve shape, the inner surface of its molding cavity is the outside curved working face [1-2] of broadening gradually from bottom to top, junction at wide copper coin [1] and narrow copper plate [2] is provided with the casting knuckle, and the outer surface of wide copper coin [1] is provided with recirculated water cooling groove [3].

2, low stress sheet metal billet crystallizer according to claim 1 is characterized in that: the bottom land of cooling bath [3] is arranged to the profiling cambered surface [3-1] identical with the inner chamber curved working face, and its cross section each point equates with inner chamber curved working face distance.