CN201020387Y

CN201020387Y - Grinding roller for flour mill

Info

Publication number: CN201020387Y
Application number: CNU2006200679615U
Authority: CN
Inventors: 赖福全
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-16
Filing date: 2006-11-16
Publication date: 2008-02-13
Anticipated expiration: 2016-11-16

Abstract

A grinding roll of a flour mill is composed of an internal and an external layer metal, which are provided with different performances. The internal layer is machine worked soft surface formation metal, while the external layer is anti-friction metal. The manganese grinding roll of the traditional flour mill 70 is replaced, so that the purpose of easy processing and cost reduction are achieved. By using the utility model, the machine processing expense of water gap and riser head removal and cutting can be saved; the manufacturing cost is reduced for 80% to 90%. The worries brought by poor quality caused unqualified grinding material or the host machine failure, seriously low benefit and large expense are solved by the utility model, which is provided with good quality.

Description

The grinding roller of flour mill

Technical field

The utility model belongs to mechanical component, particularly a kind of grinding roller of flour mill.

Background technology

At present, the grinding roller of raymond mill is the grinding consumable accessory of casting with 70 manganese steel, needs often to change.There is technical deficiency in the casting potassium steel grinding roller of existing conventional cast, and is easily mach just not wear-resisting, has wear-resisting with regard to difficult machined.The rising head that the grinding roller foundry goods increases more and the alloy at the mouth of a river account for about 50% of casting gross weight, difficulty is cut away at the rising head and the mouth of a river, and when taking a lot of work, the oxygen-acetylene material that increases the cutting rising head and the mouth of a river accounts for 5% of totle drilling cost, Modeling Material and moulding wage account for 20% of assembly, and riser feeding is inhomogeneous; Foundry goods is loose, the cracking chance is many, in the course of the work, it is concavo-convex that the undaform height appears in the foundry goods working face, makes the main frame vibrations big, easily the disconnected grinding roller of shake, even can't use, internal performance, quality, wear no resistance, waste product is many, and the foundry goods appearance is coarse will all process, for example wear-resisting alloy steel has grinding roller two end surfaces of certain anti-wear performance and the endoporus will be with 30 machined into 4-5 days, the machined expense is 150% of a foundry goods cost, thus the machined difficulty, even can't process, yield poorly, the production cost superelevation, the selling price height, market is difficult to be accepted, and the potassium steel metal magnetic not that ground mistake, have a strong impact on the quality of powder.Simultaneously, generally cast 70 manganese grinding roller hardness HB229, wear no resistance, should not promote the use of.

Summary of the invention

The purpose of this utility model provides a kind of grinding roller of flour mill, inside and outside layer metal by different performance formed, and internal layer is the thin-skinned layer of a machined metal, and skin is wear-resisting antifriction metal, replace traditional flour mill 70 manganese grinding rollers, the purpose that reach easy processing, reduces cost.

The utility model is made up of the inside and outside layer metal of different performance, and the not mouth of a river, rising head are established in internal layer (1) and outer (2) together, and internal layer (1) has taper hole, and taper hole one end has boss.

The utility model is not provided with the mouth of a river, rising head, save the mouth of a river, riser metal 50% Modeling Material 15%, moulding wage 10%, save the machined expense and account for 15% of foundry goods money, reduced production cost 80%-90%, quality is good, solved the user because of the abrasive material that causes of poor quality defective or therefore part cause main frame be out of order problem, the serious worry that benefit is low and expense is big.

Description of drawings

Fig. 1 is the utility model structure cutaway view;

Fig. 2 is the utility model vertical view.

The specific embodiment

As shown in Figure 1, 2, the utility model is cast by the inside and outside layer metal of different performance, and internal layer (1) is cast together with outer (2), and foundry goods does not need the mouth of a river, rising head, and internal layer (1) has taper hole through machined, and taper hole one end has boss.The utility model internal layer (1) be machined from the soft formation metal, comprise spheroidal graphite alloyed iron, inoculation cast iron, the pig iron, carbon steel.Outer (2) are wear-resisting antifriction metals, comprise that high alloy iron adds various trace elements, steel alloy adds the alloy part trace element, increase more carbide.Outer (2) material element is medium carbon steel C:0.35-0.55, Si:0.25-0.5, Mn:0.5-1.0; Plain cast iron, spheroidal graphite cast-iron element are C:2.2-4.0, Si:2-4, Mn≤1.0, Ni≤2, rare earth adding quantity 0.3-0.8; Internal layer (1) material element is potassium steel C:0.9-1.3, Si≤1.0, Mn11-14, Cr:1.0-2.0, Ni≤2.0, Ti≤0.2, rare earth adding quantity 0.3-0.8, Mo:0.15-1.5; Wear-resisting alloy steel C:0.35-1.3, Si:0.5-1.5, Mn:1.0-4.0, Cr:3.0-6.0, Mo:0.15-0.6, W:0.3-1.0, Cu :≤0.5, V :≤1.0, Ti≤0.2, Ni≤2.0, rare earth adding quantity 0.3-0.8; Wear-resistant iron C:1.8-3.5, Si≤1.0, Mn≤1.0, Cr:15-35, Mo:0.2-3, Cu:0.1-2.0, W:0.6-4.0, V≤0.15, Ti≤0.15, Ni≤0.2, rare earth adding quantity 0.3-0.8.Replace traditional flour mill 70 manganese grinding rollers.Specification requirement characteristics parameter according to the raymond mill grinding roller, use extraordinary centre spinning method, two different metal water of smelting furnace while melting two classes, sampling is after chemical examination, element plus-minus batching is to the temperature raising water outlet of qualified back, casting metal water needs quantity, and what measure the water receiving bag according to the volume design of casting mold, and the metal water that connects smelting furnace begins cast after measuring suitable quantity.The casting mold punching block is made in size and allowance specification requirement according to grinding roller, casting mold punching block selection material ZG:35 steel is made the casting mold punching block, to make good casting mold punching block in advance is contained in and heats 60-230 ℃ on the centrifuge, coating is hung in spraying, drive to rotate water receiving, according to the internal diameter of foundry goods, external diameter, highly, volume weight adjusts the casting mold rotating speed, makes the foundry goods density metal reach high quality indicators.Foundry goods connects dissimilar casting metal water at twice different rotating speeds after the adjustment rotating speed is extremely reasonable, outer (2) beginning per minute pours into 2/3rds metal water less than 100 commentaries on classics, and then speed governing is poured into a mould 1/3rd metal water to the meter definiteness mark rotating speed of outer (2) internal diameter specification requirement.Guarantee outer (2) metal quality.The cast internal layer (1) that continues to rev up when dropping to 1210-1250 ℃ by outer (2) temperature adds specification requirement rotating speed near internal layer (1) internal diameter gradually at the rotary speed parameter of outer (2) internal diameter.Pour internal layer (1) metal water.Use running water to be cooled to 860-930 ℃ and move back mould.Foundry goods is complete through heat treatment: 890-1100 ℃ of water, oil, air cool off; 250-500 ℃ of oil, air cool off.Foundry goods after Overheating Treatment, the aspect of foundry goods and flour mill, promptly internal layer (1) carries out machined, its lap can be without machined, and the specification requirement dimensional standard degree that relatively guarantees be arranged.Its metallographic structure of grinding roller be utilize centrifugal force with the metal water of foundry goods itself come feeding itself, reach the high density of metal structure balance.

Claims

1. the grinding roller of a flour mill is made up of the inside and outside layer metal of different performance, it is characterized in that internal layer (1) and outer (2) together, does not establish the mouth of a river, rising head, and internal layer (1) has taper hole, and taper hole one end has boss.