CN201002097Y

CN201002097Y - Composite type water-cooled casting and rolling roller core

Info

Publication number: CN201002097Y
Application number: CNU2006201624376U
Authority: CN
Inventors: 李春治
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-29
Filing date: 2006-12-29
Publication date: 2008-01-09
Anticipated expiration: 2016-12-29

Abstract

The utility model relates to casting and rolling technology on continuously casting and rolling aluminium plate in coil by aluminium and aluminium alloy, in particular to water-cooling casting and rolling roll core of casting and rolling mill. The roll core is a composite water-cooling casting and rolling roll core, which comprises a roll core body. A cooling water flume and a supporting bar are positioned at the surface of the roll core body. The utility model is characterized in that the surface of the roll core body is stainless steel layer with depth Delta welded in resurfacing welding. The depth Delta of the stainless steel layer is 16mm to 30mm. The stainless steel layer is 3Cr13 steel or 4Cr13 steel. The utility model adopts stainless steel outer layer, which is good at corrosion resistance. The intensity of the outer layer is stronger than that of the body, which can improve the size precision of the casting and rolling plate produced effectively, and can prolong the usage life for the roll core also.

Description

Combined type water-cooled casting roller core

(1) technical field

The utility model relates to the rolling casting technology of metallic aluminium and aluminium alloy direct casting continuous rolling aluminium plate in coil, relates in particular to water-cooled casting roller core in the casting and rolling machine.

(2) background technology

Casting roller in the casting and rolling machine is a core component, and the quality of casting roller function directly has influence on efficient and the product quality that the aluminium casting is produced.The function of casting roller has two effects: the first, about 700 ℃ aluminium liquid is crystallized into solid-state aluminium sheet, and second, carry out the rolling of 10% left and right sides drafts again crystallizing into solid-state aluminium sheet, these two kinds of functions were finished within 2 seconds.

Referring to Fig. 1, the casting roller is made up of two parts, and first parts are roller cores 2, and roller core is a casting roller body with water cooling system, and second parts is roller shells 1, and the roller shell hot jacket has certain tightening force on roller core, and seepage does not take place salable cooling water.Roller shell is passed to cooling water with the crystallization heat and the cooling heat of aluminium liquid during casting, and is rolled.The dimensions of casting roller is varied, the long 450mm of body of roll external diameter Φ 450mm of small dimension, the long 2000mm of body of roll external diameter Φ 1000mm of big specification.

Water route long period of soaking during casting and rolling machine work in the roller core is in water, and the water when shutting down reconditioning casting roller external diameter in the roller core flows to the outside, becomes air around the tank 3, and this can cause action of rust to supporting rib 4.Long-term corrosion becomes fragile supporting rib to die down bearing value to descend, and causes the dimensional accuracy of casting plate to degenerate, and is even unqualified and scrap.Because the hardness of roller core material is lower, be designed to 280～320HB in addition, necking deformation takes place in the roller core middle part under the live load effect for a long time, and undergauge can cause the dimensional accuracy of casting plate to descend equally, also may make plate shape defective and scrap.

(3) summary of the invention

The purpose of this utility model is to provide a kind of combined type water-cooled casting roller core, this compound casting roller core adopts the stainless steel skin, and its resistance to corrosion is strong, and outer hardness intensity is higher than body hardness, make the roll casting flatness dimensional accuracy of production obviously improve the roller core long service life.

The utility model is achieved in that a kind of combined type water-cooled casting roller core, comprise the roller core body, the roller core body surface has bosh and supporting rib, it is characterized in that: this volume surrounding of roller core becomes the stainless steel layer of layer depth δ by the welding method built-up welding, and described stainless steel layer is machined to supporting rib and bosh.

Described stainless steel layer depth δ is 16 to 30 millimeters.Stainless steel layer is 3 chromium, 13 steel or 4 chromium, 13 steel.

The utility model makes it compared with prior art owing to adopted above-mentioned technical scheme, has following advantage and good effect:

The first, skin is that the stainless steel resistance to corrosion is strong, and long-term water flowing is not corroded and do not stopped up the water route.The second, outer hardness intensity is higher than body hardness, and the ability of roller core opposing undergauge obviously improves the roller core long service life in the long-term work process.So use its plate shape dimensional accuracy of casting plate of the utility model combined type roller core production obviously to improve, the casting coiled sheet of production can keep good plate shape for a long time.

(4) description of drawings

Fig. 1 is existing water-cooled aluminium casting roll structure schematic diagram;

Fig. 2 is the utility model combined type water-cooled casting roller core structural representation;

Fig. 3 is a combined type water-cooled casting roll structure schematic diagram.

Among the figure: 1 casting roller shell, 2 roller core bodies, 3 roller core boshes, 4 roller core supporting ribs, the 5 compound skins of casting roller core stainless steel (analysing and observe), δ: the thickness of built-up welding stainless steel layer

(5) specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Referring to Fig. 2, Fig. 3, a kind of combined type water-cooled casting roller core 2 becomes the external diameter car of blank the outside dimension of d earlier when making this roller core 2.D is the excircle dimension after the roller core 2 working position forging semifinishings, is bulk material with at this circumference, is structural alloy steel, as the 42CrMo steel.D for the method that more than the d cylindrical, adopts ESW with stainless steel material burn-oning in layer, up to the size of D.Stainless steel material is 3 chromium, 13 steel or 4 chromium, 13 steel.D is built-up welding after the excircle dimension of machined roller core 2 working positions, and promptly stainless steel layer is machined to supporting rib 4 and bosh 3, and its excircle dimension is D.The thickness δ of built-up welding stainless steel layer=(D-d)/2mm.Thickness δ normal root really decides according to the size of D and bosh degree of depth t, and the general big more t of D is big more, and then stainless steel layer thickness δ is big more.T is 6～8mm in the design, then δ＞(2～3) t.As D＜500mm, the optional 16mm of δ; If δ ≈ 20mm item is selected in 500＜D＜700; If D＞700 δ selects 20～30mm.So the span of stainless steel layer thickness δ is 16mm to 30mm.

Owing to the hardness of stainless steel layer and hardness and the intensity that intensity is higher than roller core 2 bulk materials, roller core 2 external diameters do not take place or rare undergauge when long-term the use behind the roller core 2 outer composite stainless steels, and the casting coiled sheet of Sheng Chaning can keep good plate shape for a long time thus.

The anti-nature aqueous corrosion of stainless steel layer ability is strong, does not produce or seldom produces corrosion product, makes the water route unimpeded, good cooling results, and therefore cooling also is one of reason of the roll casting flatness that keeps good evenly.Combined type roller core 2 renews cover back to be scrapped to roller shell 1 and all can keep good casting plate plate shape as last, makes to produce smoothly, and output increases, and efficient improves, the cost reduction.

Claims

1. combined type water-cooled casting roller core, comprise the roller core body, the roller core body surface has bosh and supporting rib, it is characterized in that: this volume surrounding of roller core becomes the stainless steel layer of layer depth δ by the welding method built-up welding, and described stainless steel layer is machined to supporting rib and bosh.

2. combined type water-cooled casting roller core according to claim 1 is characterized in that: stainless steel layer depth δ is 16 to 30 millimeters.

3. combined type water-cooled casting roller core according to claim 1 and 2 is characterized in that: stainless steel layer is 3 chromium, 13 steel or 4 chromium, 13 steel.