CN1162231C

CN1162231C - Method for making grooved roller

Info

Publication number: CN1162231C
Application number: CNB021387559A
Authority: CN
Inventors: 钏相昭; 蔡攀峰
Original assignee: Wuhan Iron and Steel Group Corp
Current assignee: Wuhan Iron and Steel Group Corp
Priority date: 2002-07-08
Filing date: 2002-07-08
Publication date: 2004-08-18
Anticipated expiration: 2022-07-08
Also published as: CN1400066A

Abstract

The present invention relates to a method for making a roller provided with a groove. The present invention relates to the production of a roller provided with a groove. The present invention solves the problems that the hardness of the bottom of a groove is lowered, the abrasive resistance is poor, the flanging phenomenon easily occur, the heat absorption and the coldness stimulation are poor, a crack is generated because the shrinkage is blocked, the time for leading a bolt to be inserted can not be easily controlled, the cold type compatibility is poor, the operation is complicated, etc. The present invention has the technical scheme that a die block (1) is designed and made according to the requirements for the shape and the dimension of a hole pattern of a profile roller; the die block (1) is cut into two loose blocks (2) or a plurality of loose blocks (2); the surface of an outer circle of the loose block (2) is provided with an axial pin hole (3); slitting surfaces of two adjacent loose blocks (2) are provided with a radial pin hole (4); the loose block (2) which is cut is inlaid at a designed position in a cold die (5); a radial expansion pin (6) made of alloy material with a low melting point is expanded into the radial pin hole (4) of the two adjacent loose blocks (2); an axial expansion pin (7) made of alloy material with a low melting point is expanded into the axial pin hole (3) corresponding to the loose block (2); process steps, such as a pouring step, etc. are carried out according to a conventional procedure.

Description

A kind of method of making grooved roll

(1) technical field

The present invention relates to produce the method for roll, especially belong to the method for grooved roll.

(2) background technology

Before this, people have taked many measures to achieve the goal in order to produce section roll.Traditional section bar roller production method is: make smooth roll earlier, slot (pass) its deficiency: behind the fluting more as required, chilling layer is machined away, make bottom land hardness reduce, cause wearing no resistance, easily texturing, this not only influences the service life of roll, and influences the stocking surface quality.For this reason, each roll factory is devoted to produce grooved roll, thereby improves the stocking surface quality with the wearability that improves roll.Second kind of preparation method is to adopt the cold mould merogenesis to unpacking, processing trough method on cold mould, and its deficiency: the frock processing charges is not only high, and because the roll of made easily cracks, makes the percent defective height.The third method is to adopt the production of aluminium alloy loose piece inlaying process, though it utilizes the low-melting characteristics of aluminium alloy can solve the grooved roll crack problem after cast, but the deficiency that exists is: loose piece is disposable consumption, make the cost height, and can make the heat absorption Quench poor, make the thickness of the surperficial fine grained texture that needs of grooved roll be difficult to reach.Other has the latch of employing loose piece formula method, i.e. jewel hole on cold mould, by the fixing method of loose piece of latch, after cast, take out latch in the certain hour, allow loose piece shrink and move along with roll, solve shrinking the problem of being obstructed and cracking, but when its deficiency insert latch and should not control, and cold mould interchangeability is poor, operation is loaded down with trivial details, also have safety problem.

(3) technology contents

Of the present inventionly be to overcome above-mentioned deficiency, provide make simple, be difficult for cracking, a kind of method of making grooved roll that cost is low.

Its technical scheme: a kind of installation method of making grooved roll may further comprise the steps:

A has designed and produced module according to the pass and the dimensional requirement of section roll, and module is cut into two or more than two loose piece, is provided with axial pin-and-hole on the periphery of loose piece, divides at every two adjacent loose pieces to be provided with radially pin-and-hole on the tangent plane.

B is embedded in the loose piece that cuts the position that designs in the cold mould;

The radially swelling pin swelling that C makes low melting point alloy is in the radially pin-and-hole of every adjacent two loose pieces;

The axial swelling pin swelling that D makes low melting point alloy is in the axial pin-and-hole of loose piece correspondence;

E pours into a mould operation according to normal roll casting program.

For preventing the loose piece distortion, improve its heat conductivility, increase Quench, adopting material is the low silicon casting pig of high-carbon, and the percentage by weight of its composition is: C:3.0～4.5%, Si:0.4～1.0%, Mn:0.5～1.0%, P: S＜0.1% :≤0.04%.

For the axial swelling pin of low melting point alloy that makes when cast with radially the swelling pin is mobile after fusing, it is loosening to guarantee that roll solidifies the loose piece of inlaying in the cooling procedure, do not hinder contraction, make between the internal diameter of radially swelling pin and cold mould, between the two axial swelling pins of swelling in the corresponding axial pin-and-hole of loose piece certain interval be arranged.

Be to guarantee the tight fit of loose piece and cold mould, thus radially swelling pin and axial swelling pin all be designed to trapezoidal, its gradient ≯ 10 °.

It is to adopt between loose piece and the cold mould welding wire of low melting point alloy to weld.

It is the radially swelling pin that is used to make and axially the fusing point of swelling pin alloy material than low at least 300 ℃ of roll material fusing point.

The invention has the advantages that the grooved roll of being produced is difficult for cracking, makes simply, cost is low, be that loose piece is reusable, all need not change former technology, production equipment, technological equipment, technical method, simple to operate, realize standardized production easily, the grooved roll surface quality of producing is good, long service life.

(4) description of drawings

Fig. 1 is the cold mould and the loose piece assembly structure schematic diagram of the method for making grooved roll

Fig. 2 is a kind of module (loose piece) structural representation of making the method for grooved roll

Fig. 3 is that module (loose piece) A is to figure

Fig. 4 is that module (loose piece) B is to figure

(5) specific embodiments

A, designed and produced module (1) according to the pass and the dimensional requirement of section roll, module (1) is cut into two loose pieces (2), axial pin-and-hole of processing (3) and evenly distribution on the periphery of every loose piece (2), radially pin-and-hole (4) of making by aluminum alloy materials of processing on the branch tangent plane of two loose pieces (2).

B, the loose piece (2) that cuts is embedded in the position that designs in the cold mould (5);

C, radially swelling pin (6) swelling that low melting point alloy is made are in the radially pin-and-hole (4) of two loose pieces (2); Radially the gradient of swelling pin (6) is 8 °;

D, axial swelling pin (7) swelling that the low melting point aluminum alloy materials is made are in the corresponding axial pin-and-hole (3) of loose piece (2).Axially the gradient of swelling pin (7) is 8 °;

E, pour into a mould operation according to normal roll casting program.

Be the axial swelling pin of low melting point aluminum alloy materials (7) that makes when cast and swelling pin (6) mobile after fusing radially, so will make between the internal diameter of radially swelling pin (6) and cold mould (5), between the two axial swelling pins (7) of swelling in the corresponding axial pin-and-hole (3) of loose piece (2) 10～20 mm clearance are arranged.

Claims

1, a kind of method of making grooved roll may further comprise the steps:

A cuts module (1) according to the module (1) that the pass shape and the dimensional requirement of section bar roller designs and produces

Become two or more than two loose piece (2), on the periphery of loose piece (2), be provided with axial pin-and-hole (3),

On every adjacent two loose pieces (2) branch tangent plane, be provided with radially pin-and-hole (4);

B is embedded in the position that designs in the cold mould (5) with the loose piece (2) that cuts;

Radially swelling pin (6) swelling that C makes low melting point alloy is in every adjacent two loose pieces (2)

Radially in the pin-and-hole (4);

Axial swelling pin (7) swelling that D makes low melting point alloy is in the corresponding axial pin-and-hole of loose piece (2)

(3) in;

E pours into a mould operation according to conventional roll casting program.

2, according to the described a kind of method of making grooved roll of claim 1, the material that it is characterized in that loose piece (2) is the low silicon casting pig of high-carbon, and the percentage by weight of its composition is: C:3.0～4.5%, Si:0.4～1.0%, Mn:0.5～1.0%, P: S＜0.1% :≤0.04%.

3, a kind of method of making grooved roll according to claim 1 is characterized in that radially swelling pin (6) after assembling, and make between the internal diameter of itself and cold mould (5) has certain interval.

4, a kind of method of making grooved roll according to claim 1 is characterized in that between the two axial swelling pins (7) of swelling in the corresponding axial pin-and-hole (3) of loose piece (2) certain interval being arranged.

5, a kind of method of making grooved roll according to claim 1, it is characterized in that radially swelling pin (6) and axially swelling pin (7) be trapezoidal, its gradient ≯ 10 °.

6,, it is characterized in that adopting between loose piece (2) and the cold mould (5) welding wire of low melting point alloy to weld according to the described a kind of method of making grooved roll of claim 1.

7, according to the described a kind of method of making grooved roll of claim 1, it is characterized in that the radially swelling pin (6) that is used to make and axially the fusing point of swelling pin (7) alloy material than low at least 300 ℃ of roll material fusing point.