CN208019142U - One kind is containing niobium, the special chilled cast iron roll component of vanadium cutting rack - Google Patents

Abstract

The utility model is related to a kind of roller assemblies, more particularly to one kind to be made of two rolls, including upper roller and lower roll, upper roller is identical with lower roll shape, and roll includes the body of roll and roll neck containing niobium, the special chilled cast iron roll component of vanadium cutting rack；More than two semi-circular recesses are provided on roll barrel, semi-circular recesses are adjacent two-by-two, and adjacent interface is the point of a knife of slitting roller, and the roller assembly upper roller body of roll and lower roll body of roll cutting point of a knife are opposite, and the groove on two roll barrels constitutes circular hole.The roll stacks that the utility model is made up of two slitting rollers have semi-circular recesses adjacent two-by-two in upper and lower roll, and the point of a knife between semi-circular recesses has high dimensional accuracy, convenient for cut-out steel plate, avoid generating burr and folding when shearing；The roller assembly that two slitting rollers are constituted is simple in structure, and performance is stablized.

Description

One kind is containing niobium, the special chilled cast iron roll component of vanadium cutting rack

Technical field

The utility model is related to a kind of roller assemblies, more particularly to one kind to be rolled containing niobium, the special chilled cast iron of vanadium cutting rack Roll assembly.

Background technology

Splitting rolling, be exactly during the rolling process a rolled piece utilize pass effect, roll into tool there are two or two The rolled piece in parallel of the above same shape, modernization bar wire rod rolling mill are the production for improving small dimension spiral (8~Φ of Φ 12mm) Amount is widely used slit rolling process, i.e., the steel part for being rolled into deltiod is sharp by the roll hole of Machining Arc shape point of a knife, It is carried out at the same time pre-cut in pre-cut subsystem frame and cutting rack and is cut into the steel bar of 2-4 phase modulation same specifications, reboots into finished hole Type is rolled into the reinforcing bar met the size requirements.

The running speed of entire pre- cutting and splitting rolling is fast, and the cutting power and polishing machine of cutting point of a knife need to be subjected to ten Divide acid test, preferable cutting edge of a knife or a sword mouth is remained when point of a knife is cut with high temperature steel member for a long time, stronger toughness, outstanding is resistance to Mill property, very strong thermal fatigue cracking energy.Once there is exception in point of a knife position, can often be folded in the formation of finished product rolling pass, Burr and other issues, to make batches of waster.A lot of producer's cutting rack bainite ductile irons and high-speed steel now Roll, they are at respective feature：Bainite ball wears no resistance, and 500 tons of a pass cutting will convert hole, high-speed steel roll Between 1500~2000 tons, the precious alloy used is more for one pass cutting, and price is high, difficult turning.In addition, the structure of roll Design it is also quite important, often will appear in actual production due to roll structure design it is unreasonable caused by roll premature breakdown, The service life for shortening roll increases the production cost of enterprise.

Utility model content

The purpose of the utility model is to overcome defects of the existing technology, provide a kind of case hardness height, service life Long, simple in structure, high in machining efficiency contains niobium, the special chilled cast iron roll component of vanadium cutting rack.

Realizing the technical solution of the utility model aim is：One kind is containing niobium, the special chilled cast iron roll group of vanadium cutting rack Part, the roller assembly is made of two rolls, including upper roller and lower roll, and the upper roller is identical with lower roll shape, the roll Including the body of roll and roll neck；More than two semi-circular recesses are provided on the roll barrel, semi-circular recesses are adjacent two-by-two, phase Adjacent interface is the point of a knife of slitting roller, and the roller assembly upper roller body of roll and lower roll body of roll cutting point of a knife are opposite, two rolls Groove on the body of roll constitutes circular hole.

Above-mentioned technical proposal, the body of roll and roll neck are smoothly transitted by chamfering, and the 20% of chamfer radius >=roll neck diameter.

Above-mentioned technical proposal, the groove on the body of roll have 5~12.

Above-mentioned technical proposal, the groove on the body of roll have 8.

Above-mentioned technical proposal, the roller substrate tissue：VC,NbC,Mo2C₆Granular carbide+bainite+a small amount of geneva Body

After adopting the above technical scheme, the utility model have the effect of it is following positive：

(1) roll stacks that the utility model is made up of two slitting rollers have semicircle adjacent two-by-two in upper and lower roll Connected in star, the point of a knife between semi-circular recesses have high dimensional accuracy, convenient for cut-out steel plate, avoid generating when shearing burr and It folds；The roller assembly that two slitting rollers are constituted is simple in structure, and performance is stablized；

(2) the utility model roll barrel and roll neck are smoothly transitted by chamfering, and the 20% of chamfer radius >=roll neck radius, Be conducive to avoid to generate stress concentration at the body of roll and roll neck, junction can effectively be distributed to chamfering circle when by shock loading In cambered surface, roll neck is prevented to be broken；

(3) 8 cutting holes of the utility model are conducive to improve production efficiency, and per pass rolling can form 8 wire rods, this reality It is used through steel mill with new roller, 2100 tons of a splitting rolling amount, close to high-speed steel roll, but price only needs half, sexual valence Than superior.

Description of the drawings

In order to make the content of the utility model be easier to be clearly understood, below according to specific embodiment and combine attached Figure, is described in further detail the utility model, wherein

Fig. 1 the utility model roller assembly structural schematic diagrams；

1, roll in figure；1-1, the body of roll；1-2, roll neck；2, groove；3, point of a knife；4, chamfering

Specific implementation mode

(embodiment 1)

See Fig. 1, after metalworking and assembly, the utility model roller assembly is made of two rolls 1, including shape phase Same upper roller and lower roll, roll 1 include body of roll 1-1 and roll neck 1-2；It is provided with 8 half on 1 body of roll 1-1 of the utility model roll Circular groove 2, semi-circular recesses 2 are adjacent two-by-two, and adjacent interface is the point of a knife 3 of slitting roller, roller assembly upper roller body of roll 1-1 Opposite with lower roll body of roll 1-1 cuttings point of a knife 3, the groove 2 on two 1 body of roll 1-1 of roll constitutes circular hole.The utility model by The semicircle edge of a knife of cutting edge is processed on roll, to cut off 950 DEG C -1050 DEG C of steel part and rod iron, then into last groove Spiral is rolled into, there is high in machining efficiency, the good advantageous characteristic of converted products consistency.

The utility model body of roll 1-1 and roll neck 1-2 are smoothly transitted by chamfering 4,4 radiuses of chamfering >=roll neck 1-2 diameters 20%.

Obtain roller substrate tissue：VC,NbC,Mo₂C₆Granular carbide+bainite+a small amount of martensite, roll surface hardness 78HSD meets the requirement of hardness >=75HSD.Tensile strength 250Mpa meets the requirement of tensile strength >=220MPa；Roll neck is hard 40HSD is spent, the requirement of hardness >=38HSD is met.Tensile strength 500Mpa meets the requirement of tensile strength >=450Mpa.

Particular embodiments described above has carried out into one the purpose of this utility model, technical solution and advantageous effect Step is described in detail, it should be understood that the foregoing is merely specific embodiment of the utility model, is not limited to this Utility model, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all wrap Containing being within the protection scope of the utility model.

Claims (4)

1. one kind is containing niobium, the special chilled cast iron roll component of vanadium cutting rack, it is characterised in that：The roller assembly is rolled by two Roller (1) forms, including upper roller and lower roll, and the upper roller is identical with lower roll shape, and the roll (1) includes the body of roll (1-1) and roller Neck (1-2)；More than two semi-circular recesses (2) are provided on roll (1) body of roll (1-1), semi-circular recesses (2) are two-by-two Adjacent, adjacent interface is the point of a knife (3) of slitting roller, and the roller assembly upper roller body of roll (1-1) and the lower roll body of roll (1-1) are cut Divide point of a knife (3) relatively, the groove (2) on two roll (1) bodies of roll (1-1) constitutes circular hole.

2. as described in claim 1 containing niobium, the special chilled cast iron roll component of vanadium cutting rack, it is characterised in that：The roller Body (1-1) and roll neck (1-2) are smoothly transitted by chamfering (4), and the 20% of chamfering (4) radius >=roll neck (1-2) diameter.

3. as described in claim 1 containing niobium, the special chilled cast iron roll component of vanadium cutting rack, it is characterised in that：The roller Groove (2) on body (1-1) has 5~12.

4. as claimed in claim 3 containing niobium, the special chilled cast iron roll component of vanadium cutting rack, it is characterised in that：The roller Groove (2) on body (1-1) has 8.