CN104610879A - Special compound grinding agent for valve flange and preparation method of special compound grinding agent - Google Patents

Abstract

The invention discloses a special compound grinding agent for a valve flange and a preparation method of the special compound grinding agent, and relates to the technical field of valve manufacture. The special compound grinding agent is prepared from raw materials in percentage by mass as follows: 60%-65% of boron carbide, 5%-8% of diatomaceous earth, 3%-5% of carborundum, 3%-5% of chromium oxide, 2%-3% of white carbon black, 2%-3% of putty powder, 1%-2% of calcium silicate, 1%-2% of polyvinyl alcohol, 0.5%-1% of gelatin, 0.5%-1% of starch, 2%-3% of oleic acid, 5%-10% of ethanol and 5%-10% of water. Boron carbide is taken as a main abrasive, appropriate quantities of auxiliary abrasives and dispersing agents are added, and the prepared grinding agent is powdery, has stable performance and is convenient to store and transport; during use, all that is required is to add an appropriate amount of water to a mixture, the mixture is blended to be thick, a to-be-ground flange is coated with the thick product, the grinding process can be accelerated, the grinding effect is enhanced, and the grinding agent has a certain protection function on a grinding tool.

Description

A kind of valve flanges specific complex abrasive and preparation method thereof

Technical field:

The present invention relates to technical field of valve manufacturing, be specifically related to a kind of valve flanges specific complex abrasive and preparation method thereof.

Background technology:

Valve is the function unit in fluid delivery system, has cut-off, adjustment, water conservancy diversion, prevents the functions such as adverse current, voltage stabilizing, shunting or overflow pressure relief.Press valve and pipeline mode of connection is classified, valve comprise Flange joint valve, the valve that is threaded, be welded to connect valve, clamp connection valve is connected valve with cutting ferrule.Wherein, Flange joint valve uses a class valve more widely.The valve body of this kind of valve is with flange, and due to the factor such as mould and die accuracy or operation in castingprocesses, flange surface can present hackly phenomenon, and this directly will affect stopping property, causes the leakage of transported medium.

Grinding is a kind of polishing processing method, polished matrix can be made to obtain very high dimensional precision, geometrical shape and surfaceness, improve sealing property, thus extend the work-ing life of valve.At present, the grinding of valve flanges adopts mechanical mill mode more, needs to use abrasive to strengthen grinding effect in process of lapping.Although and most of abrasive can strengthen grinding effect and shorten milling time, easily damages lap tool in use.

Summary of the invention:

Technical problem to be solved by this invention is to provide valve flanges specific complex abrasive that a kind of raw material is easy to get, grinding effect is good and preparation method thereof.

Technical problem to be solved by this invention adopts following technical scheme to realize:

A kind of valve flanges specific complex abrasive, be made up of the raw material of following massfraction:

Norbide 60-65%, diatomite 5-8%, silicon carbide 3-5%, chromic oxide 3-5%, white carbon black 2-3%, putty powder 2-3%, Calucium Silicate powder 1-2%, polyvinyl alcohol 1-2%, gelatin 0.5-1%, starch 0.5-1%, oleic acid 2-3%, ethanol 5-10%, water 5-10%.

Described valve flanges specific complex abrasive is made up of the raw material of following massfraction:

Norbide 60%, diatomite 6%, silicon carbide 4%, chromic oxide 4%, white carbon black 3%, putty powder 2%, Calucium Silicate powder 1%, polyvinyl alcohol 1%, gelatin 0.5%, starch 0.5%, oleic acid 2%, ethanol 6%, water 10%.

A preparation method for valve flanges specific complex abrasive, mainly comprises the following steps:

(1) in high-speed mixer, first add gelatin and water, mix 5-10min after being warming up to 65-70 DEG C, then add norbide, silicon carbide and chromic oxide, continue mixing 15-20min, finally cool to obtain mixed liquor I;

(2) in mixed liquor I, add diatomite, white carbon black and putty powder under room temperature, after mixing 10-15min, add Calucium Silicate powder, polyvinyl alcohol and starch again, continue mixing 10-15min and obtain mixed liquor I I;

(3) first joined in sand mill by mixed liquor I I, then add oleic acid and ethanol, sand milling to fineness obtains mixed liquor I II after being less than 10um;

(4) mixed liquor I II is placed in freeze drier, after freezing 8-12h powdery substance, last discharging, pack to obtain target abrasive.

The invention has the beneficial effects as follows: the present invention is main abrasive material with norbide; and add appropriate auxiliary abrasive and dispersion agent; obtained abrasive is powder; stable in properties; only need add suitable quantity of water furnishing thick shape during use is coated on flange to be ground; can process of lapping be accelerated, strengthen grinding effect, and to lap tool, there is certain provide protection.

Embodiment:

The technique means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiment, setting forth the present invention further.

A kind of valve flanges specific complex abrasive, be made up of the raw material of following massfraction:

Norbide 60%, diatomite 6%, silicon carbide 4%, chromic oxide 4%, white carbon black 3%, putty powder 2%, Calucium Silicate powder 1%, polyvinyl alcohol 1%, gelatin 0.5%, starch 0.5%, oleic acid 2%, ethanol 6%, water 10%.

A preparation method for valve flanges specific complex abrasive, mainly comprises the following steps:

(1) in high-speed mixer, first add gelatin and water, mix 5-10min after being warming up to 65-70 DEG C, then add norbide, silicon carbide and chromic oxide, continue mixing 15-20min, finally cool to obtain mixed liquor I;

(2) in mixed liquor I, add diatomite, white carbon black and putty powder under room temperature, after mixing 10-15min, add Calucium Silicate powder, polyvinyl alcohol and starch again, continue mixing 10-15min and obtain mixed liquor I I;

(3) first joined in sand mill by mixed liquor I I, then add oleic acid and ethanol, sand milling to fineness obtains mixed liquor I II after being less than 10um;

(4) mixed liquor I II is placed in freeze drier, after freezing 8-12h powdery substance, last discharging, pack to obtain target abrasive.

The present invention is main abrasive material with norbide, and adds appropriate auxiliary abrasive and dispersion agent, and obtained abrasive is powder, stable in properties, stores and convenient transportation; Only need add suitable quantity of water furnishing thick shape during use is coated on flange to be ground, can accelerate process of lapping, strengthens grinding effect, and has certain provide protection to lap tool.

More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (3)

1. a valve flanges specific complex abrasive, it is characterized in that, be made up of the raw material of following massfraction: norbide 60-65%, diatomite 5-8%, silicon carbide 3-5%, chromic oxide 3-5%, white carbon black 2-3%, putty powder 2-3%, Calucium Silicate powder 1-2%, polyvinyl alcohol 1-2%, gelatin 0.5-1%, starch 0.5-1%, oleic acid 2-3%, ethanol 5-10%, water 5-10%.

2. a kind of valve flanges specific complex abrasive according to claim 1, it is characterized in that, described valve flanges specific complex abrasive is made up of the raw material of following massfraction: norbide 60%, diatomite 6%, silicon carbide 4%, chromic oxide 4%, white carbon black 3%, putty powder 2%, Calucium Silicate powder 1%, polyvinyl alcohol 1%, gelatin 0.5%, starch 0.5%, oleic acid 2%, ethanol 6%, water 10%.

3. a preparation method for valve flanges specific complex abrasive, is characterized in that, mainly comprises the following steps:

(1) in high-speed mixer, first add gelatin and water, mix 5-10min after being warming up to 65-70 DEG C, then add norbide, silicon carbide and chromic oxide, continue mixing 15-20min, finally cool to obtain mixed liquor I;

(2) in mixed liquor I, add diatomite, white carbon black and putty powder under room temperature, after mixing 10-15min, add Calucium Silicate powder, polyvinyl alcohol and starch again, continue mixing 10-15min and obtain mixed liquor I I;

(3) first joined in sand mill by mixed liquor I I, then add oleic acid and ethanol, sand milling to fineness obtains mixed liquor I II after being less than 10um;

(4) mixed liquor I II is placed in freeze drier, after freezing 8-12h powdery substance, last discharging, pack to obtain target abrasive.