CN114918818A - Grinding and polishing method for sealing groove of jewel valve seat of one-way valve - Google Patents
Grinding and polishing method for sealing groove of jewel valve seat of one-way valve Download PDFInfo
- Publication number
- CN114918818A CN114918818A CN202210607378.2A CN202210607378A CN114918818A CN 114918818 A CN114918818 A CN 114918818A CN 202210607378 A CN202210607378 A CN 202210607378A CN 114918818 A CN114918818 A CN 114918818A
- Authority
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- Prior art keywords
- grinding
- valve seat
- steel ball
- sealing groove
- polishing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000010437 gem Substances 0.000 title claims abstract description 82
- 229910001751 gemstone Inorganic materials 0.000 title claims abstract description 82
- 238000007789 sealing Methods 0.000 title claims abstract description 77
- 238000005498 polishing Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 71
- 239000010959 steel Substances 0.000 claims abstract description 71
- 238000012545 processing Methods 0.000 claims abstract description 15
- 238000004080 punching Methods 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 description 8
- 229910052594 sapphire Inorganic materials 0.000 description 5
- 239000010980 sapphire Substances 0.000 description 5
- 238000003754 machining Methods 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/34—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
Abstract
A grinding and polishing method for a sealing groove of a jewel valve seat of a one-way valve comprises the steps of punching, reaming, grinding an outer circle and grinding a flat blank, processing a large oil groove and a small oil groove in an orifice, and polishing an end face to obtain a jewel valve seat blank; the method is characterized in that: the method comprises the following steps of processing a sealing groove on a gem valve seat blank, fixing the gem valve seat blank on a spring clamp of a lower main shaft of a grinding machine, installing a tool fixed with a grinding steel ball at the lower end of an upper main shaft of the grinding machine, enabling the center of the grinding steel ball and the central axis of the gem valve seat blank to be on the same axis, grinding the sealing groove at an orifice of the gem valve seat blank through the grinding steel ball, taking down the tool fixed with the grinding steel ball, installing a tool fixed with a polishing steel ball at the lower end of the upper main shaft of the grinding machine, enabling the center of the polishing steel ball and the central axis of the gem valve seat blank to be on the same axis, and polishing the sealing groove of the gem valve seat blank through the polishing steel ball to obtain the polished gem valve seat with the sealing groove.
Description
Technical Field
The invention relates to the technical field of one-way valves, in particular to a grinding and polishing method for a sealing groove of a jewel valve seat of a one-way valve.
Background
The check valve is a key component of the liquid chromatograph. The check valve of a liquid chromatograph only allows liquid flow in one direction, and the valve with the flow in the opposite direction being blocked, the basic requirements for the check valve are that: the loss of the forward flow resistance is small, the sealing performance is good when the valve is reversed, and the action is sensitive. The sealing performance is good, the surface smoothness of the sealing groove is required to be high, the phenomenon of thread scratching cannot occur, and the hard sealing effect is required to be achieved.
The most critical parts in the check valve for the liquid chromatograph are a valve ball and a valve seat, wherein the valve ball and the valve seat are formed by grinding or matching with ceramic, and the artificial sapphire has the characteristics of high hardness, wear resistance, small linear expansion coefficient, high compressive strength, acid and alkali corrosion resistance and the like, so that the check valve is a commonly used material for the valve seat of the liquid chromatograph. However, since the artificial sapphire has the characteristics of high hardness (on the mohs scale of 9, second only to natural diamond), high brittleness, crystal anisotropy and the like, the processing difficulty is quite large, and particularly the processing of the valve seat sealing groove is performed. The existing implementation scheme is that a generating method principle is adopted to process a sealing groove, a sapphire valve seat product is clamped on a lower spindle and rotates along the lower spindle, an upper consolidation grinding tool rotates along an upper spindle, two axes intersect at one point during processing, an included angle is alpha, and an arc-shaped enveloping surface, namely the sealing groove, is formed by the movable track of the consolidation grinding tool. However, this solution has the following disadvantages: 1. the surface smoothness of the sealing groove can only reach Rz0.4-Rz0.8; 2. the surface shape precision of the sealing groove is poor, and the surface profile degree is about 0.015 mm; the dimensional accuracy is poor and can only reach 0.05mm at most; therefore, the matching precision of the sealing groove surface of the sapphire valve seat and the sapphire valve ball is poor, the sealing performance is poor, and the performance requirement of a liquid chromatograph cannot be met.
Disclosure of Invention
The invention aims to provide a grinding and polishing method for a sealing groove of a jewel valve seat of a one-way valve, aiming at overcoming the defects in the prior art, and solving the problems that the surface smoothness of the sealing groove is insufficient, the precision of the surface of the sealing groove is poor, the sealing performance between the sealing groove surface of the jewel valve seat and a valve ball is poor, the performance requirement of a liquid chromatograph cannot be met, and the like.
The purpose of the invention is realized as follows:
a grinding and polishing method for a sealing groove of a gem valve seat of a one-way valve comprises the steps of punching, reaming, external circle grinding and flat grinding processing are carried out on a blank, then a large oil groove and a small oil groove are processed at an orifice, and a gem valve seat blank is obtained after the end face is polished; the sealing groove processing is carried out on the gem valve seat blank according to the following steps,
s1 lapping a sealing groove: fixing a gem valve seat blank on a spring clamp of a lower main shaft of a grinding machine, installing a tool fixed with a grinding steel ball at the lower end of an upper main shaft of the grinding machine, enabling the center of the grinding steel ball and the central axis of the gem valve seat blank to be on the same axis, enabling the size of the grinding steel ball to be the same as that of a valve ball of a one-way valve, adding grinding paste into a hole of the gem valve seat blank, starting the grinding machine, enabling the rotating speed of the upper main shaft of the grinding machine to be 1000-2000 rpm and the rotating speed of the lower main shaft to be 3000-8000 rpm, grinding a sealing groove at an orifice of the gem valve seat blank through the grinding steel ball, and cleaning the gem valve seat blank after processing the sealing groove;
s2 polishing the seal groove: taking down a tool fixed with a grinding steel ball, installing the tool fixed with the grinding steel ball at the lower end of an upper main shaft of a grinding machine, enabling the center of the grinding steel ball and the central axis of a jewel valve seat blank to be on the same axis, enabling the size of the grinding steel ball to be the same as that of a valve ball of a one-way valve, adding a polishing paste into a hole of the jewel valve seat blank with a ground sealing groove, starting the grinding machine, enabling the rotating speed of the upper main shaft of the grinding machine to be 1000-2000 rpm and the rotating speed of a lower main shaft to be 3000-8000 rpm, and polishing the sealing groove of the jewel valve seat blank through the polishing steel ball to obtain the jewel valve seat with the polished sealing groove.
The grinding time of the sealing groove is 4-6 minutes; the polishing time of the sealing groove is 1-3 minutes.
And the grinding steel ball or the polishing steel ball is fixed at the lower end of the tool by bonding.
The roundness grades of the grinding steel ball and the polishing steel ball are G5-G10 grades.
The grinding steel ball is replaced after 3-5 jewel valve seat blanks are machined; and the polishing steel ball is replaced after 1-3 gem valve seat blanks are processed.
The grinding and polishing method of the sealing groove of the jewel valve seat of the check valve comprises the steps of punching, reaming, grinding an outer circle and grinding and flattening a blank, processing a large oil groove and a small oil groove in an orifice, and polishing the end face to obtain a jewel valve seat blank; the sealing groove machining is carried out on the gem valve seat blank according to the following steps, and S1 is used for finely grinding the sealing groove: fixing a jewel valve seat blank on a spring clamp of a lower main shaft of a grinding machine, and installing a tool fixed with a grinding steel ball at the lower end of an upper main shaft of the grinding machine, so that the center of the grinding steel ball and the central axis of the jewel valve seat blank are positioned on the same axis, and the size of the grinding steel ball is the same as that of a valve ball of a one-way valve, thereby avoiding an included angle formed between the central axis of the jewel valve seat blank and the central axis of the grinding steel ball, reducing the operation difficulty, improving the processing efficiency of a jewel valve seat sealing groove and reducing the cost; adding grinding paste into the hole of the gem valve seat blank, starting a grinding machine, grinding a sealing groove at the orifice of the gem valve seat blank by a grinding steel ball at the rotating speed of an upper main shaft of the grinding machine of 1000-2000 rpm and the rotating speed of a lower main shaft of the grinding machine of 3000-8000 rpm, and cleaning the gem valve seat blank after the sealing groove is machined; thereby improving the surface precision of the sealing groove of the one-way valve jewel valve seat. S2 polishing the seal groove: the tool fixed with the grinding steel ball is taken down, the tool fixed with the polishing steel ball is installed at the lower end of an upper main shaft of the grinding machine, the center of the polishing steel ball and the central axis of the jewel valve seat blank are located on the same axis, and the size of the polishing steel ball is the same as that of a valve ball of a one-way valve, so that an included angle is prevented from being formed between the central axis of the jewel valve seat blank and the central axis of the polishing steel ball, the operation difficulty is reduced, the machining efficiency of a sealing groove of the jewel valve seat is improved, and the cost is reduced; and adding polishing paste into the hole of the jewel valve seat blank with the ground sealing groove, starting a grinding machine, wherein the rotating speed of an upper main shaft of the grinding machine is 1000-2000 rpm, the rotating speed of a lower main shaft of the grinding machine is 3000-8000 rpm, and polishing the sealing groove of the jewel valve seat blank through a polishing steel ball to obtain the jewel valve seat with the polished sealing groove. Thereby improving the surface smoothness, precision and sealing performance of the sealing groove of the one-way valve jewel valve seat and further achieving the performance requirements of the liquid chromatograph.
The grinding and polishing method for the sealing groove of the jewel valve seat of the check valve is simple in processing method, suitable for batch processing, capable of improving production efficiency and reducing production cost, high in surface finish degree, high in precision and strong in sealing performance of the sealing groove of the jewel valve seat of the check valve, and further high in matching degree of the jewel valve seat of the check valve and a valve ball and high in sealing performance.
Detailed Description
A grinding and polishing method for a sealing groove of a gem valve seat of a one-way valve comprises the steps of punching, reaming, grinding an outer circle and grinding and flattening a blank by a conventional method, machining a large oil groove and a small oil groove in an orifice, and polishing an end face to obtain a gem valve seat blank;
the sealing groove processing method comprises the following steps of:
s1 lapping a sealing groove: the grinding machine is characterized in that a jewel valve seat blank is fixed on a spring clamp of a lower main shaft of the grinding machine, a tool fixed with a grinding steel ball is installed at the lower end of an upper main shaft of the grinding machine, the positions of the upper main shaft and the lower main shaft of the grinding machine are adjusted to enable the center of the grinding steel ball and the central axis of the jewel valve seat blank to be on the same axis, the size of the grinding steel ball is the same as the size of a valve ball of a one-way valve, grinding paste is added into a hole of the jewel valve seat blank, the grinding machine is started, the rotating speed of the upper main shaft of the grinding machine is 1000-2000 rpm, the rotating speed of the lower main shaft of the grinding machine is 3000-8000 rpm, and the grinding time of a sealing groove is 4-6 minutes. Grinding a sealing groove at the orifice of the gem valve seat blank by grinding a steel ball, and cleaning the gem valve seat blank after the sealing groove is processed. And grinding the steel ball, and replacing after processing 3-5 gem valve seat blanks.
S2 polishing the seal groove: the method comprises the steps of taking down a tool fixed with a grinding steel ball, installing the tool fixed with the polishing steel ball at the lower end of an upper main shaft of a grinding machine, enabling the center of the polishing steel ball and the central axis of a jewel valve seat blank to be on the same axis by adjusting the positions of the upper main shaft and a lower main shaft of the grinding machine, enabling the size of the polishing steel ball to be the same as the size of a valve ball of a one-way valve, adding polishing paste into a hole of the jewel valve seat blank with a grinding sealing groove, starting the grinding machine, enabling the rotating speed of the upper main shaft of the grinding machine to be 1000-2000 rpm, enabling the rotating speed of the lower main shaft to be 3000-8000 rpm, and enabling the polishing time of the sealing groove to be 1-3 minutes. And polishing the sealing groove of the gem valve seat blank by using the polishing steel ball to obtain the gem valve seat with the polished sealing groove. And the polishing steel balls are replaced after 1-3 gem valve seat blanks are processed.
And the grinding steel ball or the polishing steel ball is fixed at the lower end of the tool by bonding. The frock includes cylinder and adapter sleeve, the cylinder lower extreme is equipped with a conical recess, grind steel ball or polishing steel ball bonding in conical recess and partial spheroid exposes, the diameter of conical recess notch is less than the diameter of steel ball, is less than 2/3 of steel ball diameter, guarantees about 1/3 of the area accounting for the steel ball total area of the part of steel ball in conical recess, guarantees that steel ball and cylinder bonding are firm, insert the shaft hole of adapter sleeve with a locking screw locking in the upper end of cylinder, the adapter sleeve is used for the last main shaft fixed connection with the machine of grinding. The connecting sleeve is in interference fit with an upper main shaft of the grinding machine.
The roundness grades of the grinding steel ball and the polishing steel ball are G5-G10 grades. Therefore, the size and the precision grade of the sealing groove of the jewel valve seat of the one-way valve after being ground and matched reach G10 grade. The surface roughness of the sealing groove of the one-way valve jewel valve seat reaches Rz0.05-Rz0.1. The roundness grade of the steel ball 5 of the present embodiment is preferably grade G5. The roundness rating is shown in the roundness rating table of table 1.
TABLE 1
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and modifications of the present invention by those skilled in the art are within the scope of the present invention without departing from the spirit of the present invention.
Claims (5)
1. A grinding and polishing method for a sealing groove of a jewel valve seat of a one-way valve comprises the steps of punching, reaming, grinding an outer circle and grinding a flat blank, processing a large oil groove and a small oil groove in an orifice, and polishing an end face to obtain a jewel valve seat blank; the method is characterized in that: the sealing groove processing is carried out on the gem valve seat blank according to the following steps,
s1 lapping a sealing groove: fixing a gem valve seat blank on a spring clamp of a lower main shaft of a grinding machine, installing a tool fixed with a grinding steel ball at the lower end of the upper main shaft of the grinding machine, enabling the center of the grinding steel ball and the central axis of the gem valve seat blank to be on the same axis, enabling the size of the grinding steel ball to be the same as that of a valve ball of a one-way valve, adding grinding paste into a hole of the gem valve seat blank, starting the grinding machine, enabling the rotating speed of the upper main shaft of the grinding machine to be 1000-2000 rpm and the rotating speed of the lower main shaft to be 3000-8000 rpm, grinding a sealing groove at an orifice of the gem valve seat blank through the grinding steel ball, and cleaning the gem valve seat blank after processing the sealing groove;
s2 polishing the seal groove: taking down a tool fixed with a grinding steel ball, installing the tool fixed with the polishing steel ball at the lower end of an upper main shaft of a grinding machine, enabling the center of the polishing steel ball and the central axis of a jewel valve seat blank to be on the same axis, enabling the size of the polishing steel ball to be the same as that of a valve ball of a one-way valve, adding polishing paste into a hole of the jewel valve seat blank with a ground sealing groove, starting the grinding machine, enabling the rotating speed of the upper main shaft of the grinding machine to be 1000-2000 rpm and the rotating speed of a lower main shaft to be 3000-8000 rpm, and polishing the sealing groove of the jewel valve seat blank through the polishing steel ball to obtain the jewel valve seat with the polished sealing groove.
2. The grinding and polishing method for the sealing groove of the jewel valve seat of the check valve as claimed in claim 1, wherein: the grinding time of the sealing groove is 4-6 minutes; the polishing time of the sealing groove is 1-3 minutes.
3. The grinding and polishing method for the sealing groove of the jewel valve seat of the check valve as claimed in claim 1, wherein: and the grinding steel ball or the polishing steel ball is fixed at the lower end of the tool by bonding.
4. The grinding and polishing method for the sealing groove of the jewel seat of the check valve as claimed in claim 1, wherein: the roundness grades of the grinding steel ball and the polishing steel ball are G5-G10 grades.
5. The grinding and polishing method for the sealing groove of the jewel seat of the check valve as claimed in claim 1, wherein: the grinding steel ball is replaced after 3-5 gem valve seat blanks are machined; and the polishing steel ball is replaced after 1-3 gem valve seat blanks are processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210607378.2A CN114918818A (en) | 2022-05-31 | 2022-05-31 | Grinding and polishing method for sealing groove of jewel valve seat of one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210607378.2A CN114918818A (en) | 2022-05-31 | 2022-05-31 | Grinding and polishing method for sealing groove of jewel valve seat of one-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114918818A true CN114918818A (en) | 2022-08-19 |
Family
ID=82813521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210607378.2A Pending CN114918818A (en) | 2022-05-31 | 2022-05-31 | Grinding and polishing method for sealing groove of jewel valve seat of one-way valve |
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| Country | Link |
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| CN (1) | CN114918818A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002283225A (en) * | 2001-03-22 | 2002-10-03 | Olympus Optical Co Ltd | Machining device and machining method of concave spherical surface |
| CN202240873U (en) * | 2011-08-25 | 2012-05-30 | 中山铁王流体控制设备有限公司 | Multi-position full-automatic valve steel ball grinding equipment |
| CN202716154U (en) * | 2012-05-10 | 2013-02-06 | 重庆海王仪器仪表有限公司 | Grinding device of ball valve spool |
| CN103447938A (en) * | 2013-08-23 | 2013-12-18 | 浙江瑞莱士机械有限公司 | Grinding process of sealing surface of ball valve |
| CN203868430U (en) * | 2014-05-19 | 2014-10-08 | 大连理工安全装备有限公司 | Double-sealing one-way valve |
| CN204019334U (en) * | 2014-08-18 | 2014-12-17 | 江苏神通阀门股份有限公司 | A kind of spheroid of ball valve and valve seat carry out the frock of facing-up processing |
| CN208289663U (en) * | 2018-05-29 | 2018-12-28 | 天津祥嘉流体控制系统有限公司 | Ball for ball valve grinder power device |
| CN109333004A (en) * | 2018-10-31 | 2019-02-15 | 维都利阀门有限公司 | A kind of the processing of sphere technique and seal ball-valve of ceramic seal ball-valve |
| CN113510537A (en) * | 2021-04-02 | 2021-10-19 | 重庆兆宏科技有限公司 | Grinding method and grinding device for high-precision sapphire valve seat ball groove |
| CN215617098U (en) * | 2021-10-11 | 2022-01-25 | 盐城市锦东液压机械有限公司 | Polishing and grinding device for machining valve core of one-way valve |
-
2022
- 2022-05-31 CN CN202210607378.2A patent/CN114918818A/en active Pending
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| CN202716154U (en) * | 2012-05-10 | 2013-02-06 | 重庆海王仪器仪表有限公司 | Grinding device of ball valve spool |
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| CN203868430U (en) * | 2014-05-19 | 2014-10-08 | 大连理工安全装备有限公司 | Double-sealing one-way valve |
| CN204019334U (en) * | 2014-08-18 | 2014-12-17 | 江苏神通阀门股份有限公司 | A kind of spheroid of ball valve and valve seat carry out the frock of facing-up processing |
| CN208289663U (en) * | 2018-05-29 | 2018-12-28 | 天津祥嘉流体控制系统有限公司 | Ball for ball valve grinder power device |
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| CN215617098U (en) * | 2021-10-11 | 2022-01-25 | 盐城市锦东液压机械有限公司 | Polishing and grinding device for machining valve core of one-way valve |
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