Glue-jointed hardalloy composite roller ring

A cemented carbide ring, cemented carbide technology, applied in the direction of roll, metal rolling, metal rolling, etc., can solve the problems of expensive cemented carbide cost, increased thickness of cemented carbide roll ring, and decreased performance of cemented carbide. , to achieve the effect of convenient manufacturing, improved impact resistance and torque transmission capacity, and low cost

Inactive Publication Date: 2007-11-14
ZHEJIANG METALLURGICAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these metallurgical composite roller rings have the advantages of high bonding strength of the inner and outer rings, good temperature resistance, and can reduce the cost of cemented carbide, the process is complicated, and due to the high temperature manufacturing, there may also be a decrease in the performance of the cemented carbide, and the bonding layer may be damaged. Various stress defects caused by different thermal expansion rates
[0005] Bonding and compounding can avoid the above-mentioned shortcoming of metallurgical compounding, but there are some shortcomings in the existing bonding and compounding process, as disclosed in CN1513617 "hard alloy composite roll", the roll shaft containing the protruding part is directly bonded with the cemented carbide roll ring to form a Composite roll technology, CN1389320 "Manufacturing process of a composite bonded hard alloy roll" discloses an adhesive compound process f

Method used

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  • Glue-jointed hardalloy composite roller ring

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Example 1: Application on finished stand of bar mill

[0021] The invented cemented composite roll ring is combined with the roller R6 to form a composite roll. The test is carried out on the finished stand of the Pomini bar mill. The mill torque: M1=18KN, the diameter of the rolling groove is Φ116mm; 250mm, length 130mm, and the roller ring seat is bonded with chemical glue; the inner diameter of the composite roller ring seat is 230mm, and the end surface is combined with a keyway and a fastening nut. The experimental results are shown in Table 1.

[0022] Table 1: The amount of steel passing through the composite roll ring on the finished bar frame

[0023] rack

[0024] Average steel passing capacity of single groove

example 2

[0025] Example 2: Application on the front frame of the finished bar

[0026] The invented cemented composite roll ring is combined with the roller R6 to form a composite roll. The test is carried out on the finished stand of the Pomini bar mill. The mill torque: M1=18KN, the diameter of the rolling groove is Φ18mm; the outer diameter of the hard alloy roll ring is 320mm, The inner diameter is 250mm, the length is 130mm, and the roller ring seat is bonded with chemical glue; the inner diameter of the composite roller ring seat is 230mm, and the end surface is combined with a keyway and a fastening nut. The experimental results are shown in Table 2.

[0027] Table 2: The amount of steel passed by the composite roll ring in the front frame of the finished bar

[0028] rack

example 3

[0029] Example 3 Strip Mill

[0030] Assume that the maximum torque of a strip mill M=80KN.m, the radial rolling force Fr=5000KN, the width of the working face h=100mm, the outer diameter of the hard alloy roll is r=320mm, the allowable grinding is 20mm, and the inner diameter d=250mm, Composite roll ring transmits torque safety factor = 10. It can be seen from calculation that the composite roll ring without end faces requires a composite layer shear strength of 82MPa. Obviously, it is difficult for chemical glue to guarantee this strength. However, if the composite roller ring with a roller ring seat is used, the shear strength of the cemented layer can reach 50 MPa. Obviously, this can be achieved.

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Abstract

The present invention relates to a bonded hard alloy composite roll ring. It includes an iron base roll ring seat which can be fixed on the roll shaft, on said iron base roll ring seat a hard alloy ring is bonded, and on the iron base roll ring seat of the hard alloy ring one side a copper end surface ring also is fixedly connected; the described copper end surface ring is respectively bonded with iron base roll ring seat and adjacent hard alloy ring end surface, and mutually fixedly connected with said iron base roll ring seat by means of fixing bolt; and the described bonding adopts inorganic adhesive or organic adhesive, and at least is formed into a layer of bonding layer.

Description

technical field [0001] The invention relates to a cemented carbide composite roll ring specially used for metal pressure processing, especially a cemented carbide composite roll ring used for small-sized material rolling mills such as bars. Background technique [0002] Cemented carbide rolls have the advantages of excellent wear resistance, corrosion resistance and single groove rolling life, which can significantly improve production efficiency and product quality, and have received more and more attention. For example, in the high-line finishing and pre-finishing stands, the integral cemented carbide roll composed of a cemented carbide roll ring and a roll shaft has been widely used. However, such solid carbide rolls are not suitable in terms of performance or economy for small bar mills such as larger bars that are required to withstand larger rolling loads and rolling torques. . [0003] In order to solve the problem of the application of cemented carbide in small sec...

Claims

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Application Information

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IPC IPC(8): B21B27/03
Inventor 应金根傅肃嘉龙郑易
Owner ZHEJIANG METALLURGICAL RES INST
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