CN2281228Y

CN2281228Y - Composite support roller for cold rolling

Info

Publication number: CN2281228Y
Application number: CN 95230486
Authority: CN
Inventors: 赵荣国; 韩春光; 张德厚; 王刚; 白国杰
Original assignee: Angang Steel Co Ltd
Current assignee: Angang Steel Co Ltd
Priority date: 1995-03-10
Filing date: 1995-03-10
Publication date: 1998-05-13
Anticipated expiration: 2005-03-10

Abstract

The utility model relates to a support roller which is a large consumable tool for a large cold-rolling mill. When the diameter of the support roller is worn to a certain degree, the support roller can be discarded to result in a large waste. The utility model provides a combined support roller reformed from a waste and old support roller, composed of a roller shaft processed by a waste and old support roller and a roller sleeve sheathed on the roller shaft; the roller shaft and the roller sleeve are provided with a mounting interference delta =h-(D-d) /2 >0; the convexity of the roller shaft is delta d=(d 0-d 1) >0 the inner wall of the roller sleeve presents a concave shape; the concavity amount of the roller sleeve is equal to the convexity amount of the roller shaft. The composite support roller for cold rolling is used for reducing the cost by 40-50%, each roller can save funds from 400 to 500 thousand Yuan.

Description

The cold rolling backing roll of combined type

The utility model belongs to the large-scale field of tool of steel rolling, the cold rolling backing roll of particularly a kind of combined type.

Roll is the important large-scale consumable tool of steel rolling mill.Flat cold-rolled sheet milling train breaker roll has higher requirement, generally all makes with the chrome-nickel forged steel, therefore costs an arm and a leg, and up to more than 30,000 yuan/ton, every backing roll weighs 20～30 tons.Therefore every backing roll price is up to 70～1,000,000 yuan.

General reversing cold mill backing roll is φ 300mm, uses to φ 1220mm and just scraps, and backing roll weight at this moment still reaches 19～23 tons.If can not be used, then will be a kind of great waste, not only increase roll consumption, and increased considerably production cost.

The purpose of this utility model provides the cold rolling backing roll of a kind of edge shell type combined type, and hot charging is mixed a roller shell and formed new backing roll on the roll shaft that is processed into waste and old backing roll.

Another purpose of the present utility model provides a kind of cold rolling backing roll of combined type that suitable hot charging is joined the magnitude of interference that has.

According to the cold rolling backing roll of combined type of the present utility model, join edge by roller shell that is processed into inner concave shape and the roll shaft hot charging that is processed into convex and be nested together and form.Roll shaft is formed by waste and old backing roll processing and fabricating, and roller shell is made with identical material.

According to the utility model, roll shaft and roller shell have rational hot charging to join the magnitude of interference, and the selection of this magnitude of interference is that hot charging is joined key of success.

According to the utility model, roll shaft is the convex roll shaft, and roller shell is the inner concave shape roller shell, and the convexity amount of roll shaft and the concavity amount of roller shell equate.

Adopt the cold rolling backing roll of combined type of the present utility model, can make the roll cost of cold-rolled steel sheet reduce by 40～50%, every roll is economized on the use of funds 40～500,000 yuan.

Below in conjunction with accompanying drawing the utility model is elaborated.

Fig. 1 is the cold rolling backing roll schematic diagram of the utility model combined type.

Fig. 2 is the body of roll part schematic diagram of roll shaft.

As shown in Figure 1, composite type cold roll bearing roller of the present utility model is by waste and old supporting The roller shell (2) that the roll shaft that roller processes (1) and edge are enclosed within on this roll shaft forms. Supporting The total length of roller is L, and the barrel length of edge cover part is 1, and the barrel diameter of roll shaft is d, roller The external diameter of cover is D, and thick is h, h＞(D-d)/2. The assembling magnitude of interference be Δ=h-(D-d)/ 2＞0.

As shown in Figure 2, the body of roll of roll shaft is the convex body of roll, and diameter is d in the middle of it₀, the two ends diameter is d₁，d ₀＞d ₁, convexity amount Δ d=(d₀-d ₁)＞0。

The inwall of roller shell (2) is matrix, and tool concavity amount equals the convexity amount of roll shaft, its matrix The convex curved surface of curved surface and roll shaft is complementary.

Embodiment:

1.1700mm cold-rolling mill combined type backing roll.Roll total length L=4700mm, barrel length 1=1700mm, roller shell outer diameter D=1300mm.The barrel diameter d ≌ 940mm of roll shaft, wall thickness of roll shell h ≌ 180mm.Select assembling magnitude of interference Δ=0.37mm, roll shaft convexity amount Δ d=d ₀-d ₁=0.20mm, roller shell indent tolerance also equals 0.20mm.

2.1200mm cold-rolling mill combined type backing roll, roll total length L=4210mm, body of roll total length=1200mm, all the other parameters are with embodiment 1.

Claims

1, the waste and old roller of a kind of usefulness cold rolling backing roll of combined type of changing system into, it is characterized in that the roller shell (2) that the roll shaft (1) that processed by waste and old backing roll and edge are enclosed within on this roll shaft forms, the barrel diameter of roll shaft is d, the external diameter of roller shell is D, wall thickness is h, assembling magnitude of interference Δ=h-(D-d)/2＞0, the body of roll of roll shaft is the convex body of roll, diameter is d in the middle of it ₀, the two ends diameter is d ₁, convexity amount Δ d=(d ₀-d ₁＞0, the inwall of roller shell (2) is matrix, and its concavity amount equals the convexity amount of roll shaft, and the convex curved surface of its concave Iy curved and roll shaft is complementary.

2, according to the cold rolling backing roll of the combined type of claim 1, it is characterized in that at roller shell outer diameter D=1300mm, the barrel diameter d ≌ 940mm of roll shaft, wall thickness of roll shell h ≌ 180mm selects assembling magnitude of interference Δ=0.37mm, roll shaft convexity amount Δ d=d ₀-d ₁=0.20mm, roller shell indent tolerance also equals 0.20mm.