CN1824432A

CN1824432A - Manufacturing method of cane squeezing roller shell of sugar making machine

Info

Publication number: CN1824432A
Application number: CN 200610018643
Authority: CN
Inventors: 王孝忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-03-24
Filing date: 2006-03-24
Publication date: 2006-08-30

Abstract

The present invention provides a method for making cane-pressing roller shell of sugar-making machine. It is characterized by that it selects and uses a high-speed rotary centrifugal machine, and makes it act on the casting alloy liquor of cane-pressing roller shell to produce a strong centrifugal force, so that the alloy liquor is spread over the model cavity of cane-pressing roller shell so as to obtain the compact cane-pressing roller shell casting blank. When the molten metal is poured, the cane-pressing roller shell mould adopts the horizontal pouring mode.

Description

The manufacture method of cane squeezing roller shell of sugar making machine

Technical field

The present invention relates to a kind of cane sugar manufacture plant equipment, especially a kind of shell casting method of cane milling roller.

Background technology

Cane pressing roller of sugar is contained in the juice of sugarcane inside in order to extrusion, and the most basic form comprises the three-roller type pressing device of a top roller and two bottom rollers.Top roller and bottom roller respectively comprise the cylindric roller shell of a forged steel axle and urib founding, the outside of roller shell is along even some the V-type teeth that distribute of circumference, three one of pressure roller are called top roller in the above, two one of bottom rollers are called preliminary roller in front, one is called the back roller in the back, and three rollers distribute in a triangle.Sugarcane is fed between top roller and the bottom roller and is squeezed, and the inner contained sugarcane juice of sugarcane is squeezed out.Because of all sugarcanes all will could extrude sugarcane juice as much as possible through five to six times of pressure roller squeezings, thereby to the working face wearing and tearing especially severe of roller shell.Original designing technique falls behind, the squeezing roller processing of China and world's cane sugar industry, and its spray all is to adopt sand casting, vertical casting.For the weight that obtains intact its rising head of foundry goods has accounted for 1/3rd of gross weight, the a large amount of energy and the material that are used for molten rising head have been wasted, but because foundry goods is excessive, cause the phenomenon of hole shrinkage porosite at the foundry goods end face toward contact, again because sand casting, defective such as sand holes, pore ubiquity is so the allowance diameter of foundry goods is all wanted about 60mm.Because the black alloy cast iron material of wriggling of our factory production, its alloy all are the cast(ing) surface superficial parts down that becomes to be Quench,, influenced the quality of press for extracting juice roller if just wear-resisting alloy composition is machined away by big amount of machining like this.Because the casting technique of the vertical casting of original sand casting is used in the production of antifriction alloy cane pressing roller of sugar, just caused above defective.Thereby the life-span of roller is very short, will change in general 1～3 year, has both wasted a large amount of electric power and coking coal equal energy source and metal material, has increased the production cost in sugar refinery again, influences the repair time in sugar refinery.

Summary of the invention

The purpose of this invention is to provide a kind of not casting pressing port, reduce allowance, eliminate defectives such as foundry goods shrinkage porosite, shrinkage cavity, sand holes, pore, obtain both to have saved material and the energy, increase the foundry engieering new method of high-quality sugar-cane crusher shell blank abrasion resistance, intact, fine and close again.

The technical solution used in the present invention is: utilizing the cane milling roller is a microscler hollow cylinder, when casting cane milling roll, original molten metal is cast in sand mold static state, change the dynamic casting of molten metal under centrifugal action into, select a kind of centrifuge of high speed rotation for use, act on and produce a powerful centrifugal force on the casting alloy liquid of sugar-cane crusher shell, alloy liquid is thrown on the model cavity of sugar-cane crusher shell, and obtained fine and close sugar-cane crusher shell spray; When molten metal was cast, the sugar-cane crusher shell mould adopted horizontal casting.The rising head of cane pressing roller of sugar blank is removed, and the allowance of cane milling roll circumference is reduced as far as possible,, directly process tooth punching up to not staying allowance.

Adopt the sugar-cane crusher shell of method casting of the present invention, owing to do not want casting pressing port, reduced allowance, make press for extracting juice roller blank weight reduce 1/3rd, reduce metal consumption about 40%, save the raw material and the energy greatly, and improved 1～2 times of service life, economic benefit and social benefit highly significant.

Description of drawings

Fig. 1 is sugar-cane crusher shell foundry goods axis and horizontal plane parallel construction schematic diagram.

Fig. 2 has an out of plumb angle structural representation for sugar-cane crusher shell foundry goods axis and horizontal plane.

The specific embodiment

1, the cane squeezing roller shell of sugar making machine rough casting is bulky, need to make rising head with 1/3rd molten metal, just might reduce the shrinkage cavity and the shrinkage defect that press roller, so the blank of original sugared machine roller shell is the casting technique that adopts the vertical casting of sand mold moulding.This a kind of casting technique has been continued to use decades, is the classical technology of making cane pressing roller of sugar.When having analyzed sand casting, we can not take the reason of horizontal casting, be because during horizontal casting, be difficult to obtain not have the foundry goods of defectives such as sand holes, pore, cinder hole shrinkage cavity on the periphery up of cane pressing roller of sugar, and the working face of Sugar cane press roller just on the periphery, so for fear of this fatal defective, the sand casting cane pressing roller of sugar must adopt vertical casting.At these special circumstances, we organize scientific and technical personnel to tackle key problems, and thinking and experiment through the several years work out a kind of new casting technique finally.In order to remove huge rising head, make the various blank weight of original press for extracting juice roller reduce 1/3rd from 3～21 tons.Reduce the consumption of molten metal, reduce the allowance that presses the roller circumference, we utilize the centrifuge of rotation at a high speed, act on powerful centrifugal force on the molten metal, make molten metal under powerful action of centrifugal force, form the foundry goods finer and close than conventional cast.In order to reach this purpose, we abandon sand molding, adopt special casting---centrifugal casting, and it is the casting method that molten metal is overlapped with rotation at centrifugal action compacted under foundry goods axis.

With original vertical casting, transform horizontal casting into.Horizontally be cast with two kinds of forms, as Fig. 1, a kind of is that sugar-cane crusher shell foundry goods axis is parallel with horizontal plane; As Fig. 2, a kind of is that sugar-cane crusher shell foundry goods axis and horizontal plane have an off plumb angle.Its angle is chosen an angle wantonly between the right angle and the straight angle.Horizontal casting can make the axis and the horizontal direction parallel of roller shell with the height of sugar-cane crusher shell mould along horizontal accumbency; Horizontal casting also can be with the height of sugar-cane crusher shell mould, and horizontal tilt relatively makes the axis of roller shell not overlap with horizontal line, and molten metal is poured into along in the press for extracting juice roller die of the rotation of tilting.The cane pressing roller of sugar shell model can be without internal mold, and direct pouring is on external mold; The model of sugar-cane crusher shell also can be accepted the metal liquid casting with internal mold.With this new casting technique, make sugared machine cane pressing roller of sugar rough casting contraction in length 1/3rd, reduce about 40% of metal consumption, save a large amount of electric power and metallurgical coking coal equal energy source and metal material.Adopt this technology to make cane pressing roller of sugar, we have made detail analysis, because the working face of cane pressing roller of sugar is exactly the circumferential area of pressure roller, and the centrifugal force of horizontal type centrifugal-casting, by chance be exactly to point to circumference, molten metal solidifies under the crunch of centrifugal force on the periphery of pressure roller shell like this, just can obtain and the intact worker of the sugar-cane crusher shell of pore-free, shrinkage cavity shrinkage porosity sand holes uses face, overcome the defective of original sand casting, this has just improved the service life of sugar-cane crusher shell greatly, according to our experiment, can improve 1～2 times of service life.The product that we produced, belong to high energy consumption, the heavy type of high resource consumption and simple steel product, be again the requisite equipment in all sugar refinery, it can improve 1～2 times of service life, just can save a large amount of electric power coking coal, the pig iron and other resource, its social benefit, economic benefit are quite huge, are the good methods that we build a conservation-minded society.

2, now be illustrated in conjunction with the accompanying drawings:

Power 1, by power transmission shaft 2, driving driving wheel 3 rotates, the high speed rotation of driving wheel 3, superincumbent external mold 4 rotations are pressed in drive, and external mold 4 drives internal molds 5 unitary rotation, and molten metal 7 enters internal mold by cast gate base 6, after molten metal solidifies, form the rough casting 8 of hollow circular cylinder sugar-cane crusher shell under centrifugal action.This sugar-cane crusher shell blank 8 does not have the cane pressing roller of sugar foundry goods of energy-conservation, the material-saving of the densification of shrinkage cavity, shrinkage porosite, sand holes, pore, intact, no rising head exactly.Because external mold, internal mold overall weight are big and the offset and the tapering of the excircle processing of mould are all very little, so mold integral all is to be pressed on the driving wheel to rotate, can disorderly not fly, this is the result who draws after we test.

Claims

1, a kind of manufacture method of cane squeezing roller shell of sugar making machine is characterized in that:

Select the centrifuge of a kind of high speed rotation for use, act on the casting alloy liquid of sugar-cane crusher shell and produce a powerful centrifugal force, alloy liquid is thrown on the model cavity of sugar-cane crusher shell, and obtained fine and close sugar-cane crusher shell spray; When molten metal was cast, the sugar-cane crusher shell mould adopted horizontal casting.

2, the manufacture method of sugar-cane crusher shell according to claim 1 is characterized in that: horizontal casting can make the axis and the horizontal direction parallel of roller shell with the height of sugar-cane crusher shell mould along horizontal accumbency.

3, the manufacture method of sugar-cane crusher shell according to claim 1, it is characterized in that: horizontal casting also can be with the height of sugar-cane crusher shell mould, horizontal tilt relatively makes the axis of roller shell not overlap with horizontal line, and molten metal is poured into along in the press for extracting juice roller die of the rotation of tilting.

4, the manufacture method of sugar-cane crusher shell according to claim 1 is characterized in that: the cane pressing roller of sugar shell model can be without internal mold, and direct pouring is on external mold.

5, the manufacture method of sugar-cane crusher shell according to claim 1 is characterized in that: the model of sugar-cane crusher shell can be accepted the metal liquid casting with internal mold.