CN2203194Y

CN2203194Y - Combined rolls

Info

Publication number: CN2203194Y
Application number: CN 93210819
Authority: CN
Inventors: 刘惠良; 刘文志
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-27
Filing date: 1993-04-27
Publication date: 1995-07-12
Anticipated expiration: 2003-04-27

Abstract

The utility model belongs to a roller for rolling machines, especially for a combined roller utilizing tungsten carbide to make contact rolled pieces. The utility model is characterized in that the roll core of the roller and a roll sleeve are crossedly combined by a concave and convex structure; the roll sleeve is made of tungsten carbide and is positioned at the outer periphery of the circle of the roll core; the roll core is made of metal materials which are of the same wire expansion coefficient as the tungsten carbide and the roller can be prevented from cracking when the change between heat and coldness is great; the hole-shaped groove of a special-shaped steel is made of tungsten carbide; the working surface of the roller is made of tungsten carbide, and therefore, service life is long and the surface quality of rolled pieces is high; because a part of thewhole roller is made of tungsten carbide with high prices, manufacturing cost is reduced.

Description

Combined rolls

The utility model relates to a kind of rolling-mill roller, particularly with the composite roller of tungsten carbide as contact rolled piece roll surface.

In all kinds of rolling mills, require roll to have higher intensity, hardness and hear resistance, with the wearability that increases roll with prevent various rolls damage.Except that adopting various improved technologies, also select various materials, particularly make composite roller, promptly make roller shell by carbide alloy, the roller core linear expansion coefficient material manufacturing the same with roller shell, but the hardness of this class roller surface also can only reach Shore 80-85, in existing rod-rolling mill, the representative root milling train that rubs is to make collars with tungsten carbide, and hardness can reach Shore 95-98.But bigger stress is arranged, the accident that normal generation carbon tungsten roller ring breaks in the production between this collars and the power transmission shaft.Reduce this class accident and be one of key that improves operating rate of rolling mill, and tungsten carbide is precious materials very again.

The purpose of this utility model provides a kind of composite roller, makes its advantage with tungsten carbide roll, can reduce its break accident again, and reduces manufacturing cost.

To achieve these goals, scheme of the present utility model is to intersect combination by concaveconvex structure between roller core and roller shell, roller shell tungsten carbide manufacturing, and wrap in the periphery of roller core, and roller core is with the linear expansion coefficient high-strength metal material making the same with tungsten carbide.

To strip steel and some shaped roll, the height of the roller shell roughly length with roller core is identical.

The roller shell that is used for shaped roll also can be embedded in the periphery middle part of roller core, and the height of roller shell exposed portions serve is equal to or less than the maximum height that is inlaid in the roller core, and this helps preventing that roll from breaking.

In order to guarantee the hardness of the utility model roll when the rolled section steel, the pass groove is produced on the outer rim of roller shell by tungsten carbide.

The roller core of shaped roll is enclosed within on the power transmission shaft, and the roller core of strip steel roll is coupled as one mutually with power transmission shaft.

Above scheme is a tungsten carbide because of the working surface of roll, thereby reaches the long working life of roll, the purpose that the rolled piece surface quality is high.Be that the high-strength metal material the same with the tungsten carbide linear expansion coefficient made because of the roller core material again, combine closely between roller core and the tungsten carbide, thus be difficult for producing break accident, thus improve the operating rate of milling train, again because of making whole roll, thereby reduced cost of manufacture without the high tungsten carbide of valency.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 and Fig. 2 are the schematic diagrames of two line bar rolls in the shaped steel.Fig. 3 is a schematic diagram of pulling belt steel roller.

Expression outlet bar roll respectively has a pass groove in Fig. 1 and Fig. 2, also is the same if any several pass grooves, also can be other shaped steel groove, is the combination of concaveconvex structure intersection between roller core 1 and the roller shell 2.Fig. 1 represents that the axial length of roller core 1 is identical with the height of the tungsten carbide roller shell 2 of its outside (being horizontal direction in Fig. 1); Fig. 2 represents that roller shell 2 is embedded in the periphery middle part of roller core 1, roller core 1 is surrounded the major part of roller shell 2, make the height (in Fig. 2, being horizontal direction) of roller shell 2 exposed portions serve be equal to or less than the maximum height that is inlaid into axial (also being horizontal direction) in the roller core 1, can prevent better that like this tungsten carbide roller shell 2 from breaking.Roller core 1 among Fig. 1 and Fig. 2 is an annular, it forms the collars of the root milling train that rubs described in the background technology with roller shell 2, its centre bore inserts the power transmission shaft of milling train, the roller core 1 of power transmission shaft and high-strength metal material made matches, combine and intersects by concaveconvex structure between the roller shell 2 that roller core 1 and tungsten carbide are made, so in use be difficult for generation roll break accident.

Fig. 3 represents a kind of band steel composite roller of pulling, and in roller core 1 outside tungsten carbide roller shell 2 is arranged, and intersects combination by concaveconvex structure between the two.Roller shell 2 is almost the same long with roller core 1.The thinner part in two ends is connected with roller core 1 and is the power transmission shaft part among the figure.

More than roller core among three embodiment all use the higher-strength metal material manufacturing the same with the tungsten carbide linear expansion coefficient, can guarantee that so cold and hot variation is unlikely to make breaking in conjunction with producing of roller core 1, roller shell 2 and they when big.

Claims

1, a kind of rolling mill composite roller, it has roller core (1) and roller shell (2), it is characterized in that between roller core (1) and the roller shell (2) by the combination of concaveconvex structure intersection, roller shell (2) is made with tungsten carbide, and wrapping in the periphery of roller core (1), roller core (1) is with the linear expansion coefficient high-strength metal material making the same with tungsten carbide.

2, roll according to claim 1 is characterized in that the same length of the height and the roller core (1) of roller shell (2).

3, roll according to claim 1 is characterized in that roller shell (2) is embedded in the periphery middle part of roller core (1), and roller shell (2) exposes height partly and is equal to or less than the maximum height that is inlaid in the roller core (1).

4,, it is characterized in that the pass groove (3) of shaped roll is produced on the outer rim of roller shell (2) according to claim 1,2 or 3 described rolls.