CN103447938A - Grinding process of sealing surface of ball valve - Google Patents
Grinding process of sealing surface of ball valve Download PDFInfo
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- CN103447938A CN103447938A CN201310373163XA CN201310373163A CN103447938A CN 103447938 A CN103447938 A CN 103447938A CN 201310373163X A CN201310373163X A CN 201310373163XA CN 201310373163 A CN201310373163 A CN 201310373163A CN 103447938 A CN103447938 A CN 103447938A
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Abstract
The invention relates to a grinding process of a sealing surface of a ball valve. The grinding process comprises the steps of rough grinding, fine grinding, ultrafine grinding, and grinding and cleaning of a valve seat and a sphere, wherein a diamond paste and an engine oil mixture are adopted in the rough grinding, the particle size phi of the selected diamond paste ranges from 40mu m to 10mu m, so that the scratch removal and sphere rounding can be realized; in fine grinding, a diamond paste, kerosene and a microcrystal graphite mixture are adopted, the particle size phi of the selected diamond paste ranges from 7mu m to 5mu m, so that the primary mirror surface effect can be achieved; in the ultrafine grinding, a diamond paste and a microcrystal graphite and kerosene mixture are adopted, the particle size phi of the selected diamond paste is smaller than 5mu m, the rotating speed of the sphere is controlled to be below 5rpm to achieve the mirror surface effect, and finally the kerosene is coated on the sphere and grinding cleaning are performed to achieve a better mirror surface effect. The sphere ground and the sealing surface of the valve seat can achieve the mirror surface effect, the surface roughness can achieve Ra0.02-0.005, the operation torque is low, the service life is long, the valve seat can be adsorbed on the spherical surface of the sphere, and no leakage exists under the trial pressure of low-pressure nitrogen being 0.6MPa.
Description
Technical field
The present invention relates to valve and manufacture field, the definite manufacturing process that says ball valve, the more precisely grinding technics of sealing surface between ball seat and spheroid.
Background technology
The processing of sealing surface employing grinding technics between valve seat and spheroid in ball valve, the fineness of sealing surface between its valve seat and spheroid, and the goodness of fit between valve seat and spheroid, directly affect sealing property between ball seat and spheroid, valve opening and closing operation moment of torsion and valve service life etc.Between the valve seat that existing grinding technics obtains and spheroid, the roughness of sealing surface is Ra0.15-0.2, and the goodness of fit between valve seat and spheroid detects: low-pressure nitrogen pressure testing 0.6Mpa has micro-leakage, can observe directly spheroid by naked eyes and sealing surface of seat is black simultaneously.Between its valve seat and spheroid, sealing surface fineness is poor, makes the coefficient of friction large (being about 0.2+) of sealing surface between valve seat and spheroid; Thereby cause valve opening and closing operation moment of torsion large, operation inconvenience, between valve seat and spheroid, sealing is poor, and sealing surface easily weares and teares, the defect that service life is short.
Summary of the invention
For the poor defect of sealing surface fineness and the goodness of fit between the valve seat existed in prior art and spheroid, the object of the present invention is to provide a kind of ball valve sealing face grinding technics, realize that sealing surface of seat and spheroid present inferior light (turning white or burnt hair) or the mirror effect of best bright finish more, and the good goodness of fit between valve seat and spheroid, greatly reduce the coefficient of friction between valve seat and spheroid, have advantages of that the ball valve sealing performance is good, open and close the light and long service life of operation.
For achieving the above object, the invention provides following technical scheme: a kind of ball valve sealing face grinding technics, spheroid is placed on the spin finishing platform of lapping device, it is characterized in that: according to following grinding steps, carry out:
(1) rough lapping: control the spheroid rotating speed at 10rpm ~ 150rpm, first adopt the grinding tool on lapping device to be ground spheroid, be ground to and remove grinding machine cut rounding spheroid on spheroid, use valve seat and spheroid instead and mutually be ground to grinding machine cut on the removing sealing surface of seat, the mixture that abradant abrasive material is diamond paste and machine oil, diamond paste and machine oil percent by volume are 1:1 ~ 10, the granularity of diamond paste is Φ 40 μ m ~ 10 μ m, after grinding completes, spherome surface and valve base surface are cleaned up;
(2) smooth grinding: control the spheroid rotating speed at 0.5rpm-10rpm, first adopt the grinding tool on lapping device to be ground spheroid, be ground to the preliminary mirror effect that fuzzy reflective inverted image appears in sphere, the grinding vestige of each grinding part is even, be less than Ra0.09 to the ball seal surface roughness, use valve seat and spheroid match grinding 5 ~ 30 minutes to valve seat and ball seal face instead and reach preliminary mirror effect, be less than Ra0.09 to the valve base sealing surface roughness, abradant abrasive material is diamond paste, the mixture of kerosene and micro crystal graphite, its percent by volume is diamond paste 10% ~ 30%, micro crystal graphite 10% ~ 35%, kerosene 45% ~ 70%, the granularity of diamond paste is Φ 10 μ m ~ 5 μ m, the granularity of micro crystal graphite is less than the granularity of diamond paste, after grinding completes, spheroid and valve base surface are cleaned up,
(3) fine abrasive: control the spheroid rotating speed below 5rpm, use the grinding tool on lapping device to be ground spheroid, be ground to the mirror effect that can see clear reflective inverted image, be less than Ra0.05 to the ball seal surface roughness, use the mutual match grinding of valve seat and spheroid to valve seat and sphere instead and reach mirror effect, be less than Ra0.05 to the valve base sealing surface roughness; The mixture that abradant abrasive material is diamond paste, micro crystal graphite and kerosene, its percent by volume is diamond paste 10% ~ 30%, micro crystal graphite 10% ~ 35%, kerosene 45% ~ 70%, the granularity of diamond paste is for being less than Φ 5 μ m, the granularity of micro crystal graphite is less than the granularity of diamond paste, after grinding completes, spherome surface and valve base surface are cleaned up;
(4) valve seat and spheroid facing-up mill clean: spheroid is fixed, and at spherome surface, evenly applies kerosene, and valve seat swings and mutually grinds along spheroid, to removing greasy dirt on spheroid and sealing surface of seat.
Reasonable: the step of described fine abrasive is divided into three times, the diamond paste granularity that three fine abrasives are used successively by the grinding order is respectively Φ 5 μ m ~ 2.5 μ m, Φ 2.5 μ m ~ 0.5 μ m and is less than Φ 0.5 μ m, during each fine abrasive, adopt grinding tool to grind spheroid at least 3 minutes, valve seat and spheroid match grinding 5 ~ 10 minutes, and finally be less than Ra0.05 to spheroid and valve base sealing surface roughness, be mirror effect, after each the grinding, spherome surface and valve base surface are cleaned up.
Reasonable: described rough lapping step is divided into three times and carries out, the diamond paste granularity of wherein using successively by the grinding order in three rough lappings is respectively Φ 40 μ m ~ 28 μ m, Φ 28 μ m ~ 20 μ m and Φ 14 μ m ~ 10 μ m, rough lapping for the first time is to removing grinding machine cut rounding spheroid on spheroid, remove sealing surface of seat grinding machine cut and coincide with spheroid, when rough lapping for the second time and rough lapping for the third time, each grinding tool grinds at least 20 minutes, and finally to the ball seal surface roughness for being less than Ra0.2, use valve seat and spheroid match grinding 5 ~ 10 minutes instead, and finally to the valve base sealing surface roughness for being less than Ra0.2, after each the grinding, spherome surface and valve base surface are cleaned up.
Reasonable: described smooth grinding step is divided into twice and carries out, the diamond paste granularity of wherein using successively by the grinding order in twice smooth grinding is respectively Φ 10 μ m ~ 7 μ m and Φ 7 μ m ~ 5 μ m, smooth grinding to spheroid and the sealing surface of seat of spheroid presents inferior photochromic for the first time, it is even that spheroid and sealing surface of seat grind vestige, smooth grinding to sphere and valve seat on spheroid presents preliminary mirror effect for the second time, and finally be less than Ra0.09 to spheroid and valve base sealing surface roughness, after each smooth grinding completes, spherome surface and valve base surface are cleaned up.
Reasonable: in each step of described rough lapping, smooth grinding and fine abrasive, grinding tool and valve seat swing grinding along the direction of spheroid switched in opposite, and amplitude of fluctuation covers the whole sealing surface of spheroid.
Grinding technics of the present invention, corase grind adopts diamond paste and machine oil to mix, machine oil can guarantee lubricated and cooling-down effect good in process of lapping, machine oil can guarantee that diamond paste can stick on the ball seal face that needs to grind simultaneously, and on valve seat, grinding tool on corresponding abradant surface, diamond paste contacts with abradant surface reliably, and control diamond paste granularity is Φ 40 μ m ~ 10 μ m, and corase grind adopts, and diamond paste is from coarse to fine to be ground, cut on the reliable worn spheroid of energy and valve seat, and rounding spheroid; Smooth grinding is used instead by the diamond paste of certain percentage proportioning, micro crystal graphite and kerosene mixture, kerosene and micro crystal graphite have good lubricant effect, kerosene also has certain cleaning action, realize the cleaning of grinding limit, limit, use the diamond paste that granularity is less instead, smooth grinding adopts two steps to carry out simultaneously, realizes preliminary mirror effect; Pass through again fine abrasive, can realize that spheroid and sealing surface of seat are mirror effect, reach roughness for being less than Ra0.05, finally by the facing-up of crossing valve seat and spheroid, clean, not only realize cleaning action, eliminate the abrasive pastes of the micropore that is positioned at spheroid and sealing surface of seat, and increase mirror effect, make spheroid and valve seat fit like a glove, it is Ra0.02 that the best can reach roughness; And being divided into some little steps in each grinding steps simultaneously, diamond paste is from coarse to fine to be ground, and guarantee to reach corresponding grinding effect, and grinding operation is convenient;
After last valve seat and the cleaning of spheroid facing-up mill, the surface roughness of test spheroid and sealing surface of seat can reach Ra0.02-0.05, in the situation that the surface roughness of spheroid and sealing surface of seat is low simultaneously, during valve opening and closing, the operation moment of torsion is low, and the valve opening and closing operation is light; And valve seat and the ball seal performance good, valve seat is adsorbable on the sphere of spheroid, and under low-pressure nitrogen pressure testing 0.6Mpa without leaking, reach zero leakage.Below in conjunction with the specific embodiment, the present invention is described further.
The accompanying drawing explanation
Fig. 1 is lapping device structural representation in the specific embodiment of the invention.
The specific embodiment
Below by embodiment, the present invention is specifically described; only be used to further illustrate the present invention; can not be interpreted as limiting the scope of the present invention, the technician in this field can make some nonessential improvement and adjustment to the present invention according to the content of foregoing invention.
Spheroid is placed on lapping device, lapping device is technology well known to those of ordinary skill in the art, as its general configuration of Fig. 1 is: the grinding tool 2 that comprises frame 1 and cup-shaped, drive motors 3 is installed on frame 1, drive motors 3 outputs are connected with rotating disc 4, be fixed with the packing ring 5 for placing spheroid on rotating disc 4, spheroid is placed on packing ring 5, drive rotation through drive motors 3, grinding tool 2 is for grinding spheroid, and drive motors 3 is controlled output speed by the frequency converter (not shown).
Spheroid and valve seat after grinding machine processing are processed by following grinding steps, and the rough lapping step is preferably three steps and carries out.
(1) rough lapping: preparation is ground and is used abrasive material: a, diamond paste (granularity Φ 40 μ m ~ 28 μ m)+machine oil, by volume percentage is (diamond paste) 1:(machine oil) 1 ~ 10 mixing, best is (diamond paste) 1:(machine oil) 1; B, diamond paste (granularity Φ 28 μ m ~ 20 μ m)+machine oil, by volume percentage is (diamond paste) 1:(machine oil) 1 ~ 10 mixing, best is (diamond paste) 1:(machine oil) 1; C, (diamond paste) 1:(machine oil) 1 ~ 10 mixing, best is (diamond paste) 1:(machine oil) 1.
First rough lapping: select abrasive material a to be coated on the sphere of spheroid, control the spheroid rotating speed at 10rpm ~ 150rpm; First adopt grinding tool to grind, during grinding, grinding tool is the swing with the spheroid direction of rotation, and swings the sealing surface that the grinding scope covers whole spheroid; Operating personnel, by observing, after there is no obvious grinding machine cut spheroid rounding on the sphere of spheroid (sealing surface), can adopt roundness measuring equipment to measure the poor 5 μ m that are less than of diameter of spheroid, select valve seat and spheroid to carry out the facing-up mill; During grinding, valve seat is the swing with the spheroid direction of rotation, and swings the sealing surface that the grinding scope covers whole spheroid, match grinding on sealing surface of seat without obvious cut, valve seat and spheroid are substantially identical, energy is bonded to each other, there is no the observable gap of naked eyes; After first rough lapping completes, spheroid and valve seat are cleaned up, avoid residual particles.Rough lapping for the second time: select abrasive material b to be coated on the sphere (sealing surface) of spheroid, control the spheroid rotating speed at 10rpm ~ 150rpm, first adopt grinding tool to grind at least 20 minutes, adopt the roughness measuring instrument auxiliary judgment, detecting the ball seal surface roughness gets final product for being less than Ra0.4, carry out the facing-up mill 5 ~ 10 minutes with valve seat and spheroid again, and, through the roughness measuring instrument auxiliary judgment, detect the valve base sealing surface roughness and get final product for being less than Ra0.4; During grinding, grinding tool, valve seat are the swing with the spheroid direction of rotation, and swing the sealing surface that the grinding scope covers whole spheroid; After grinding completes, spheroid and valve seat are cleaned up (can adopt clear water to clean, or Ultrasonic Cleaning, or wiping etc.), spheroid and valve base surface residual particles avoided.Rough lapping for the third time: select abrasive material c to be coated on the sphere of spheroid, control the spheroid rotating speed at 10rpm ~ 150rpm, first adopt grinding tool to grind at least 20 minutes, and through the roughness measuring instrument auxiliary judgment, detecting the ball seal surface roughness gets final product for being less than Ra0.2, carry out the facing-up mill 5 ~ 10 minutes with valve seat and spheroid again, and, through the roughness measuring instrument auxiliary judgment, detect the valve base sealing surface roughness for being less than Ra0.2; During grinding, grinding tool, valve seat are the swing with the spheroid direction of rotation, and amplitude of fluctuation surpasses the Qiu Ding center; After grinding completes, spheroid and valve seat are cleaned up, avoid residual particles.
Rough lapping adopts diamond paste three steps from coarse to fine to grind, grind more convenient, be convenient to judgement and reach corresponding grinding effect, grind better control, shorten the whole rough lapping time, the sphere of spheroid can be eliminated obvious grinding machine cut fully, and by the spheroid rounding, the sealing surface of spheroid and valve seat can be fitted, without clear gap.
To carry out smooth grinding by following smooth grinding step through spheroid and the valve seat of rough lapping; Smooth grinding is preferably twice to carry out.
(2) smooth grinding: preparation is ground and is used abrasive material: d, diamond paste (Φ 10 μ m ~ 7 μ m)+micro crystal graphite (<Φ 10 μ m)+kerosene, presses the percent by volume proportioning of diamond abrasive pastes 10% ~ 30%, micro crystal graphite 10% ~ 35%, kerosene 45% ~ 70% and mixes; E, diamond paste (Φ 7 μ m ~ 5 μ m)+micro crystal graphite (<Φ 7 μ m)+kerosene, press the percent by volume proportioning of diamond abrasive pastes 10% ~ 30%, micro crystal graphite 10% ~ 35%, kerosene 45% ~ 70% and mix.In process of lapping, utilize the lubricated and grinding effect of micro crystal graphite, grinds more meticulously, and lubricated, the cooling of kerosene and cleaning action, realize that grinding limit, limit cleans, convenient grinding.
First smooth grinding: select abrasive material d to be coated on the sphere of spheroid, control the spheroid rotating speed at 0.5rpm-10rpm, first adopt grinding tool to grind, during grinding, grinding tool is the swing with the spheroid direction of rotation, and swings the sealing surface that the grinding scope covers whole spheroid; Operating personnel are by observing, and the sphere of spheroid presents inferior photochromic (turning white or burnt hair), and the grinding vestige of each several part is even, and, through the roughness measuring instrument auxiliary judgment, detect the ball seal surface roughness for being less than Ra0.1; Use valve seat and spheroid instead and carry out the facing-up mill, during grinding, valve seat is the swing with the spheroid direction of rotation, and swing the sealing surface that the grinding scope covers whole spheroid, match grinding to sealing surface of seat presents inferior photochromic (turning white or burnt hair), and, through the roughness measuring instrument auxiliary judgment, detect the valve base sealing surface roughness for being less than Ra0.1; After grinding completes, spheroid and valve seat are cleaned up, avoid residual particles.Smooth grinding for the second time: select abrasive material e to be coated on the sphere of spheroid, control the spheroid rotating speed at 0.5rpm-10rpm, first adopt grinding tool to grind, during grinding, grinding tool is the swing with the spheroid direction of rotation, and swings the sealing surface that the grinding scope covers whole spheroid; Operating personnel are by observing, and the sphere be ground on spheroid presents preliminary mirror effect, and on the spheroid sphere, polishing scratch is tiny, can see fuzzy inverted image on the sphere of spheroid, the spheroid sphere is white in color, and through the roughmeter auxiliary judgment, measures the ball seal surface roughness and is less than Ra0.09; Use valve seat and spheroid facing-up mill instead, during grinding, valve seat is the swing with the spheroid direction of rotation, and swing the sealing surface that the grinding scope covers whole spheroid, be ground to sealing surface of seat and present preliminary mirror effect, through the roughmeter auxiliary judgment, measure the valve base sealing surface roughness and be less than Ra0.09.
Smooth grinding adopts diamond paste three steps from coarse to fine to grind, and grinds more conveniently, is convenient to judgement and reaches corresponding grinding effect, and process of lapping is better controlled, and shortens the whole smooth grinding time.
To carry out fine abrasive by following fine abrasive step through spheroid and the valve seat of above-mentioned steps smooth grinding; Super grinding is preferably three steps and carries out.
(3) fine abrasive: preparation is ground and is used abrasive material: f, diamond paste (Φ 5 μ m ~ 2.5 μ m)+micro crystal graphite (<Φ 5 μ m)+kerosene, presses the percent by volume proportioning of diamond abrasive pastes 10% ~ 30%, micro crystal graphite 10% ~ 35%, kerosene 45% ~ 70% and mixes; G, diamond paste (Φ 2.5 μ m ~ 1 μ m)+micro crystal graphite (<Φ 2.5 μ m)+kerosene, press the percent by volume proportioning of diamond abrasive pastes 10% ~ 30%, micro crystal graphite 10% ~ 35%, kerosene 45% ~ 70% and mix; H, diamond paste (<Φ 0.5 μ m)+micro crystal graphite (<Φ 0.5 μ m)+kerosene, press the percent by volume proportioning of diamond abrasive pastes 10% ~ 30%, micro crystal graphite 10% ~ 35%, kerosene 45% ~ 70% and mix.
First fine abrasive: select abrasive material f to be coated on the sphere of spheroid, control the spheroid rotating speed below 5rpm, first adopt grinding tool to grind, during grinding, grinding tool is the swing grinding with the spheroid direction of rotation, and swings the sealing surface that the grinding scope covers whole spheroid; Grind at least 3 minutes, operating personnel are by observing, and the sphere of spheroid has inverted image more clearly; Use valve seat and spheroid instead and carry out the facing-up mill, during grinding, valve seat is the swing with the spheroid direction of rotation, and swing the sealing surface that the grinding scope covers whole spheroid, match grinding 5 to 10 minutes, there is inverted image comparatively clearly to sealing surface of seat, and, through the roughness measuring instrument auxiliary judgment, detect the sealing surface roughness of spheroid and valve seat for being less than Ra0.08; After grinding completes, spheroid and valve seat are cleaned up, avoid residual particles.Fine abrasive for the second time: select abrasive material g to be coated on the sphere of spheroid, control the spheroid rotating speed below 5rpm, first adopt grinding tool to grind, during grinding, grinding tool is the swing with the spheroid direction of rotation, and swings the sealing surface that the grinding scope covers whole spheroid; Grind at least 3 minutes, operating personnel are by observing, and the sphere of spheroid can have inverted image clearly, presents mirror effect; Use valve seat and spheroid instead and carry out the facing-up mill, during grinding, valve seat is the swing with the spheroid direction of rotation, and swing the sealing surface that the grinding scope covers whole spheroid, match grinding 5 to 10 minutes, sealing surface of seat has inverted image clearly, presents mirror effect, and, through the roughness measuring instrument auxiliary judgment, the detection roughness is less than Ra0.06 and gets final product; After grinding completes, spheroid and valve seat are cleaned up, avoid residual particles.Fine abrasive for the third time: select abrasive material h to be coated on the sphere of spheroid, control the spheroid rotating speed below 5rpm, first adopt grinding tool to grind, during grinding, grinding tool is the swing with the spheroid direction of rotation, and swings the sealing surface that the grinding scope covers whole spheroid; Grind at least 3 minutes, operating personnel are by observing, and the sphere of spheroid can have inverted image clearly, is mirror effect; Use valve seat and spheroid instead and carry out the facing-up mill, during grinding, valve seat is the swing with the spheroid direction of rotation, and swing the sealing surface that the grinding scope covers whole spheroid, match grinding 5 to 10 minutes, sealing surface of seat has inverted image clearly, i.e. mirror effect, and, through the roughness measuring instrument auxiliary judgment, detect spheroid and valve base sealing surface roughness and be less than Ra0.05; After grinding completes, spheroid and valve seat are cleaned up, avoid residual particles.
Fine abrasive adopts diamond paste three steps from coarse to fine to grind, and grinds more conveniently, is convenient to judgement and reaches corresponding grinding effect, grinds better and controls, and shortens the whole fine abrasive time.
To by with lower valve base and spheroid facing-up, grinding cleaning step, be undertaken through spheroid and the valve seat of above-mentioned steps fine abrasive;
(4) valve seat and spheroid facing-up mill clean: spheroid is fixed, evenly apply kerosene on spheroid, valve seat beat on spheroid grinds, be ground to valve seat and spheroid wipe oil, usually after being ground to spheroid and valve seat wipe oil, also need the mutual grinding through at least 2 minutes, it is reflective that the sphere that finally reaches spheroid reaches minute surface, guarantees like this goodness of fit of spheroid and valve seat and the mirror effect of both sealing surfaces.Reach like this and eliminate the abrasive pastes that are positioned at the micropore on spheroid and sealing surface of seat, finally reach the mirror ultrafinish effect of roughness Ra 0.02-0.05, valve seat can be adsorbed on the sphere of spheroid.
After above-mentioned steps, sphere and valve base surface present minute surface, can see clearly reflective inverted image; With surface roughometer, the sphere of spheroid and the sealing surface of valve seat are carried out to roughness measurement, surface roughness Ra 0.02-0.05 detected; Valve seat is adsorbable on the spheroid sphere; And under low-pressure nitrogen pressure testing 0.6Mpa, without leaking.
Claims (6)
1. a ball valve sealing face grinding technics, be placed in spheroid on the spin finishing platform of lapping device, it is characterized in that: according to following grinding steps, carry out:
(1) rough lapping: control the spheroid rotating speed at 10rpm ~ 150rpm, first adopt the grinding tool on lapping device to be ground spheroid, be ground to and remove grinding machine cut rounding spheroid on spheroid, use valve seat and spheroid instead and mutually be ground to grinding machine cut on the removing sealing surface of seat, the mixture that abradant abrasive material is diamond paste and machine oil, diamond paste and machine oil percent by volume are 1:1 ~ 10, the granularity of diamond paste is Φ 40 μ m ~ 10 μ m, after grinding completes, spherome surface and valve base surface are cleaned up;
(2) smooth grinding: control the spheroid rotating speed at 0.5rpm-10rpm, first adopt the grinding tool on lapping device to be ground spheroid, be ground to the preliminary mirror effect that fuzzy reflective inverted image appears in sphere, the grinding vestige of each grinding part is even, be less than Ra0.09 to the ball seal surface roughness, use valve seat and spheroid match grinding 5 ~ 30 minutes to valve seat and ball seal face instead and reach preliminary mirror effect, be less than Ra0.09 to the valve base sealing surface roughness, abradant abrasive material is diamond paste, the mixture of kerosene and micro crystal graphite, its percent by volume is diamond paste 10% ~ 30%, micro crystal graphite 10% ~ 35%, kerosene 45% ~ 70%, the granularity of diamond paste is Φ 10 μ m ~ 5 μ m, the granularity of micro crystal graphite is less than the granularity of diamond paste, after grinding completes, spheroid and valve base surface are cleaned up,
(3) fine abrasive: control the spheroid rotating speed below 5rpm, use the grinding tool on lapping device to be ground spheroid, be ground to the mirror effect that can see clear reflective inverted image, be less than Ra0.05 to the ball seal surface roughness, use the mutual match grinding of valve seat and spheroid to valve seat and sphere instead and reach mirror effect, be less than Ra0.05 to the valve base sealing surface roughness; The mixture that abradant abrasive material is diamond paste, micro crystal graphite and kerosene, its percent by volume is diamond paste 10% ~ 30%, micro crystal graphite 10% ~ 35%, kerosene 45% ~ 70%, the granularity of diamond paste is for being less than Φ 5 μ m, the granularity of micro crystal graphite is less than the granularity of diamond paste, after grinding completes, spherome surface and valve base surface are cleaned up;
(4) valve seat and spheroid facing-up mill clean: spheroid is fixed, and at spherome surface, evenly applies kerosene, and valve seat swings and mutually grinds along spheroid, to removing greasy dirt on spheroid and sealing surface of seat.
2. ball valve sealing face grinding technics according to claim 1, it is characterized in that: the step of described fine abrasive is divided into three times, the diamond paste granularity that three fine abrasives are used successively by the grinding order is respectively Φ 5 μ m ~ 2.5 μ m, Φ 2.5 μ m ~ 0.5 μ m and be less than Φ 0.5 μ m, during each fine abrasive, adopt grinding tool to grind spheroid at least 3 minutes, valve seat and spheroid match grinding 5 ~ 10 minutes, and finally be less than Ra0.05 to spheroid and valve base sealing surface roughness, be mirror effect, after each the grinding, spherome surface and valve base surface are cleaned up.
3. according to the described ball valve sealing face of claim 1 or 2 grinding technics, it is characterized in that: described rough lapping step is divided into three times and carries out, the diamond paste granularity of wherein using successively by the grinding order in three rough lappings is respectively Φ 40 μ m ~ 28 μ m, Φ 28 μ m ~ 20 μ m and Φ 14 μ m ~ 10 μ m, rough lapping for the first time is to removing grinding machine cut rounding spheroid on spheroid, remove sealing surface of seat grinding machine cut and coincide with spheroid, when rough lapping for the second time and rough lapping for the third time, each grinding tool grinds at least 20 minutes, and finally to the ball seal surface roughness for being less than Ra0.2, use valve seat and spheroid match grinding 5 ~ 10 minutes instead, and finally to the valve base sealing surface roughness for being less than Ra0.2, after each the grinding, spherome surface and valve base surface are cleaned up.
4. according to the described ball valve sealing face of claim 1 or 2 grinding technics, it is characterized in that: described smooth grinding step is divided into twice and carries out, the diamond paste granularity of wherein using successively by the grinding order in twice smooth grinding is respectively Φ 10 μ m ~ 7 μ m and Φ 7 μ m ~ 5 μ m, smooth grinding to spheroid and the sealing surface of seat of spheroid presents inferior photochromic for the first time, it is even that spheroid and sealing surface of seat grind vestige, smooth grinding to sphere and valve seat on spheroid presents preliminary mirror effect for the second time, and finally be less than Ra0.09 to spheroid and valve base sealing surface roughness, after each smooth grinding completes, spherome surface and valve base surface are cleaned up.
5. ball valve sealing face grinding technics according to claim 3, it is characterized in that: described smooth grinding step is divided into twice and carries out, the diamond paste granularity of wherein using successively by the grinding order in twice smooth grinding is respectively Φ 10 μ m ~ 7 μ m and Φ 7 μ m ~ 5 μ m, smooth grinding to spheroid and the sealing surface of seat of spheroid presents inferior photochromic for the first time, it is even that spheroid and sealing surface of seat grind vestige, smooth grinding to sphere and valve seat on spheroid presents preliminary mirror effect for the second time, and finally be less than Ra0.09 to spheroid and valve base sealing surface roughness, after each smooth grinding completes, spherome surface and valve base surface are cleaned up.
6. ball valve sealing face grinding technics according to claim 1, it is characterized in that: in each step of described rough lapping, smooth grinding and fine abrasive, grinding tool and valve seat swing grinding along the direction of spheroid switched in opposite, and amplitude of fluctuation covers the whole sealing surface of spheroid.
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| CN109202602A (en) * | 2018-09-20 | 2019-01-15 | 成都光明光电股份有限公司 | Method for polishing non-spherical insert |
| CN109967984A (en) * | 2019-05-17 | 2019-07-05 | 嘉兴民政石油机械附件厂 | A kind of processing technology of valve ball valve seat |
| CN111745470A (en) * | 2020-06-29 | 2020-10-09 | 沈阳富创精密设备有限公司 | Mirror polishing processing method for steel material |
| CN112077700A (en) * | 2020-07-24 | 2020-12-15 | 江苏联峰工业装备科技有限公司 | Ball sealing surface grinding machine capable of quickly cooling |
| CN112959141A (en) * | 2021-02-23 | 2021-06-15 | 北京理工大学 | Grinding material granularity gradient change investigation method based on torque feedback |
| CN113427356A (en) * | 2021-06-30 | 2021-09-24 | 哈尔滨电气动力装备有限公司 | Grinding machining process for sealing surface of mechanical sealing part of nuclear main pump |
| CN113967858A (en) * | 2021-11-03 | 2022-01-25 | 江苏核电有限公司 | Method and device for grinding sealing surface of valve for nuclear power station |
| CN114918818A (en) * | 2022-05-31 | 2022-08-19 | 重庆川仪自动化股份有限公司 | Grinding and polishing method for sealing groove of jewel valve seat of one-way valve |
| CN114939825A (en) * | 2022-06-30 | 2022-08-26 | 国营川西机器厂 | Device and method for repairing pendulum hammer cut oil edge of main fuel regulator |
| CN114952581A (en) * | 2022-05-25 | 2022-08-30 | 天津祥嘉流体控制系统有限公司 | Polishing process for hardened layer on surface of ball body of ultralow-temperature ball valve |
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| CN103921177A (en) * | 2014-04-14 | 2014-07-16 | 卢杰 | Method for grinding laser cavities |
| CN103921177B (en) * | 2014-04-14 | 2016-02-03 | 重庆电子工程职业学院 | A kind of Ginding process of laser cavity |
| CN105690255A (en) * | 2016-03-21 | 2016-06-22 | 浙江亚恩材料工程技术有限公司 | Small ball valve ball body accurate grinding tool |
| CN107538279A (en) * | 2016-12-30 | 2018-01-05 | 沪东重机有限公司 | It is vented the milling tool and Ginding process of valve actuating mechanism annex annular seal groove |
| CN107130181A (en) * | 2017-06-22 | 2017-09-05 | 合肥力和机械有限公司 | A kind of household electrical appliances special bearing steel ball and preparation method thereof |
| CN109202602A (en) * | 2018-09-20 | 2019-01-15 | 成都光明光电股份有限公司 | Method for polishing non-spherical insert |
| CN109967984A (en) * | 2019-05-17 | 2019-07-05 | 嘉兴民政石油机械附件厂 | A kind of processing technology of valve ball valve seat |
| CN111745470A (en) * | 2020-06-29 | 2020-10-09 | 沈阳富创精密设备有限公司 | Mirror polishing processing method for steel material |
| CN112077700A (en) * | 2020-07-24 | 2020-12-15 | 江苏联峰工业装备科技有限公司 | Ball sealing surface grinding machine capable of quickly cooling |
| CN112959141A (en) * | 2021-02-23 | 2021-06-15 | 北京理工大学 | Grinding material granularity gradient change investigation method based on torque feedback |
| CN112959141B (en) * | 2021-02-23 | 2022-06-03 | 北京理工大学 | Grinding material granularity gradient change investigation method based on torque feedback |
| CN113427356A (en) * | 2021-06-30 | 2021-09-24 | 哈尔滨电气动力装备有限公司 | Grinding machining process for sealing surface of mechanical sealing part of nuclear main pump |
| CN113967858A (en) * | 2021-11-03 | 2022-01-25 | 江苏核电有限公司 | Method and device for grinding sealing surface of valve for nuclear power station |
| CN114952581A (en) * | 2022-05-25 | 2022-08-30 | 天津祥嘉流体控制系统有限公司 | Polishing process for hardened layer on surface of ball body of ultralow-temperature ball valve |
| CN114952581B (en) * | 2022-05-25 | 2023-09-29 | 天津祥嘉流体控制系统有限公司 | Ultra-low temperature ball valve sphere surface hardening layer polishing process |
| CN114918818A (en) * | 2022-05-31 | 2022-08-19 | 重庆川仪自动化股份有限公司 | Grinding and polishing method for sealing groove of jewel valve seat of one-way valve |
| CN114939825A (en) * | 2022-06-30 | 2022-08-26 | 国营川西机器厂 | Device and method for repairing pendulum hammer cut oil edge of main fuel regulator |
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Effective date of registration: 20151228 Address after: 325000, Zhejiang Wenzhou Longwan District Yongxing Street Pearl Road, No. 597 office building on the third floor Patentee after: WENZHOU ARTECH MACHINERY TECHNOLOGY CO., LTD. Address before: 325000 Zhejiang Wenzhou Longwan District Yongxing Street valve base four road four Patentee before: Zhejiang Ruilaishi Machinery Co., Ltd. |