Extrusion roller preparation method
A technology of extrusion rollers and roller sleeves, which is applied in the field of metal matrix composite materials, can solve the problems of difficult replacement of cemented carbide cylinders, easy wear of extrusion roller surfaces, and short service life of extrusion rollers, so as to improve work efficiency and The effect of service life, not easy to wear, and simplified production process
Inactive Publication Date: 2017-12-15
JIANGSU JINHANG MACHINERY MFG CO LTD
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Problems solved by technology
However, this method has the following defects. It is troublesome to fix the wear-resistant stud, and it is easy to form defects during the welding process, which may easily cause the stud to fall off.
In addition, the cemented carbide cylinder is not easy to replace after wear
In addition, the surface of the extrusion roller is easy to wear, and the service life of the extrusion roller is short
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0017] The preparation method of the extrusion roller described in the present embodiment specifically comprises the following steps:
[0018] 1) Fully mix 200-mesh zirconium corundum ceramic particles, water glass, and alloy powder according to the mass ratio of ceramic particles, binder, and alloy powder at a ratio of 100:10:50, and fill it into the mold under the action of the binder The ceramic prefabricated body with a honeycomb structure is formed in the cavity. After preheating and drying the preformed body (900°C, heat preservation for 30 minutes), splicing it into the required roller sleeve shape, putting it into the sand mold cavity, and then preheating the cavity. Cast high manganese steel molten metal at 1520°C for compounding to obtain a ceramic-metal extrusion roll sleeve with honeycomb holes, and finally process the honeycomb holes on the roll sleeve to achieve the required precision; among them, The alloy powders are aluminum powder, iron powder, silicon powder...
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Abstract
The invention discloses an extrusion roller preparation method. Ceramic particles, a binding agent and alloy powder are fully mixed to fill in a mold to obtain a ceramic prefabricated body with a honeycomb structure; the prefabricated body is heated for drying to assemble as a needed roller sleeve shape, and is put in a sand model molding cavity; then, the molding cavity is preheated; molten metal is cast for compounding to obtain a ceramic-metal extrusion roller sleeve with honeycomb holes; finally, the honeycomb holes in the roller sleeve are machined to achieve the needed precision; a wear resisting column nail is obtained by using a power metallurgy sintering process, and adopts the material of a hard alloy; the wear resisting column nail is assembled on the roller sleeve through interference fit; and the roller sleeve sleeves a roller body to obtain an extrusion roller. The extrusion roller preparation method has the advantages of solving such problems as easy wear, short service life and high maintenance cost in a traditional extrusion roller, prolonging the service life and reducing the cost.
Description
technical field [0001] The invention relates to a preparation method of an extrusion roller, which belongs to the field of metal matrix composite materials. Background technique [0002] As a high-efficiency and energy-saving crushing equipment, roller presses have been widely used in industries such as cement and building materials. With the development of roller press technology, they have been applied in mine crushing and grinding operations. The roller press can increase the production efficiency of the crushing system by 30%-400%, and reduce the energy consumption by 20%-30%. When the roller press is working, the two opposite-moving extrusion rollers generate a huge extrusion force under the action of the hydraulic system to crush the material. At this time, the roller surface needs to bear the pressure of 50-300MPa, which will generate strong friction with the material and be subjected to the impact force of the material, so the roller surface is very easy to wear. A...
Claims
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IPC IPC(8): B22D19/16B22F7/08C22C30/00
CPCB22D19/16B22F7/08C22C30/00
Inventor 沈祥红
Owner JIANGSU JINHANG MACHINERY MFG CO LTD