CN106425832A - Liquid expansion type precision grinding tool for inner hole - Google Patents
Liquid expansion type precision grinding tool for inner hole Download PDFInfo
- Publication number
- CN106425832A CN106425832A CN201610888861.7A CN201610888861A CN106425832A CN 106425832 A CN106425832 A CN 106425832A CN 201610888861 A CN201610888861 A CN 201610888861A CN 106425832 A CN106425832 A CN 106425832A
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- China
- Prior art keywords
- plunger
- screw rod
- nut
- grinding
- grinding tool
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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
- B24B37/27—Work carriers
-
- 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
- B24B37/02—Lapping machines or devices; Accessories designed for working surfaces of revolution
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
The invention belongs to the technical field of precision machining and provides a liquid expansion type precision grinding tool for an inner hole. The liquid expansion type precision grinding tool comprises a plunger nut, two sets of O-shaped seal rings, two sets of Y-shaped seal rings, an expansion sleeve, a grinding shaft sleeve, a plunger screw and an oil plug. According to the grinding tool, a thin-walled hydraulic expansion mandrel is used as a driving element for the radial deformation of the cylindrical thin-walled grinding shaft sleeve, a distance between the plunger screw and the plunger nut is reduced by tightening the plunger screw, the pressure intensity of hydraulic oil in a cavity of the expansion mandrel increases, the radial deformation of the thin-walled elastic expansion sleeve is caused, and the radial expansion of the cylindrical elastic grinding shaft sleeve is accordingly driven, so that the precision grinding of the inner hole with a bulging tendency is realized. The grinding tool can be operated on a lathe, has the advantages that the structure is simple, the grinding shaft sleeve is changeable, the operation is convenient, the inner hole grinding precision is high, saddle-shaped error cannot be produced, and the like, can meet the superhigh precision grinding requirement of the inner hole, and has great market application prospects and popularization value.
Description
Technical field
The invention belongs to precision processing technology field, relate to the accurate grinding tool of a kind of liquid expanding endoporus.
Background technology
Attrition process is a kind of Ultra-precision Turning technique, is mainly used in processing plane, the face of cylinder and sphere etc. by simply several
The Ultra-precision Turning of the face shape what element is constituted.At present, the flatness of plane lapping typically can reach 0.2～0.5 μm；The face of cylinder
The circularity ground typically can reach 0.2～0.5 μm, and cylindricity typically can reach 0.5～1 μm.Endoporus grinds needs external diameter smaller
The elastic shaft sleeve can finely tuned within the specific limits in inner hole of workpiece diameter and outside dimension realizes.Traditional endoporus grinding tool
The move toward one another using single conical surface or double cone over glaze and hole, utilize the radial component of wedging movement to realize grinding axle sleeve more
Be radially expanded.The sectional dimension of this grinding axle sleeve is change, causes the rigidity grinding each cross section of axle sleeve inconsistent, expands
It is difficult to ensure that grind the cylindricity of axle sleeve external diameter during deformation；Other annular sleeve one sidewall is fully disconnected into c-type, and this structure is swollen
It is difficult to ensure that grind the circularity of axle sleeve external diameter after bulging deformation.Therefore, current grinding tool is unsatisfactory for the grinding of ultraprecise endoporus
Require.
The microstructure form of endoporus mainly has cylinder, cone, the shape of a saddle and cydariform etc. several.From the use of endoporus
Saying in angle, the high precision inner-pore on part is mainly used in processing or the benchmark of test, therefore, under certain cylindricity, cylinder
The endoporus of shape and cydariform is easier to obtain high installation and positioning precision, and the positioning precision of contrary cone and shape of a saddle endoporus is just
Poor.The endoporus as easy as rolling off a log generation cone error using traditional endoporus grinding tool to process and shape of a saddle error, on an equal basis
Under cylindricity, such error reduces the installation positioning precision of endoporus.
Content of the invention
Problem present in the existing endoporus grinding technique of solution, the invention provides a kind of liquid expanding endoporus precise finiss
Frock, including plunger nut, two set O RunddichtringOs, two set y-type seal rings, expansion sleeve, grinding axle sleeve, plunger screw rod, plug cock；
Plunger nut one end is provided with centre bore, and the other end is provided with screwed hole；The external diameter of the plunger section of plunger nut is more than it
The external diameter of chuck gripping section, forms a pillow block between two sections；The cylindricity of plunger face is not more than 5 μm, with expansion sleeve endoporus
Diameter difference is less than 5 μm, and surface roughness is not more than Ra0.4；The radial direction of the plunger section that O RunddichtringO is installed on plunger nut is U-shaped
In annular groove, y-type seal ring is installed on plunger nut in the end face annular groove of screwed hole, prevents hydraulic fluid leak；
Expansion sleeve generally drum, wall thickness is 0.8～2mm, is coated at outside plunger nut and plunger screw rod；Expand
Set one end is provided with a pillow block, coordinates realization axially positioning with the pillow block of plunger nut；
Grinding axle sleeve generally drum, being coated at the outer middle side part of expansion sleeve, wall thickness 2～5mm, its two ends are alternately provided with
Groove that is uniform and that do not turn off, the cecum of groove is the through hole more than well width for the radially-arranged diameter；
Plunger screw rod end is connected with plunger nut thread, forms screwed hole chamber between the two；Plunger screw rod bar portion, post
Surround expanding arbor chamber with expansion sleeve bottom plug nut, reduced between plunger screw rod and plunger nut by turning plunger screw rod
Distance, make the hydraulic oil pressure in expanding arbor chamber increase, cause thin-walled elastic expansion set that radial deformation occurs, and then drive
Dynamic Elastic Cylindrical is ground axle sleeve and is radially expanded, thus realizes the precise finiss with cydariform trend endoporus；Set on plunger screw rod
There is the oil duct connecting screwed hole chamber and expanding arbor chamber, when plunger screw rod changes with the relative position of plunger nut
When, the hydraulic oil energy free flow in two chambers；The radial direction of the plunger section that another O RunddichtringO is installed on plunger screw rod is U-shaped
In annular groove, another y-type seal ring is installed on plunger screw rod in the end face annular groove of screwed hole, prevents hydraulic fluid leak；Post
The one end not being inflated set covering on plug screw rod is provided with an oil outlet, and plug cock is used for sealing oil outlet；Expanding arbor chamber with go out
Also being provided with oil duct between oilhole, during for refueling, the outflow of chamber interior air and unnecessary hydraulic oil, also serves as hydraulic oil and lets out
Repairing passage after leakage.
The chuck gripping section of described plunger nut is non-polished surface, which is provided with a through hole, is used for screwing plunger spiral shell
Apply opposing torque during bar.
Above-mentioned expansion sleeve uses the material of the 40Cr through modulation treatment or similar nature, and the surface roughness of endoporus is not
More than Ra0.4, cylindricity is not more than 5 μm.
Above-mentioned grinding axle sleeve uses ductile cast iron material, and its external diameter is equal to inner hole of workpiece size and twice abrasive particles
Size sum.
Above-mentioned plunger screw rod has, away from screw thread one end, the shaft part that external diameter is less than plunger face diameter, and this shaft part is provided with two
Parallel plane, is used for implementing clamping and reverses.
The beneficial effects of the present invention is, invented the accurate grinding tool of a kind of liquid expanding endoporus, for inner bore of part
Precise finiss.This grinding tool uses hydraulic buckling mandrel the driving as the radial deformation of cylinder-shaped thin wall grinding axle sleeve of thin-walled
Dynamic element, reduces the distance between plunger screw rod and plunger nut by turning plunger screw rod, makes the liquid in expanding arbor chamber
Force feed pressure increases, and causes thin-walled elastic expansion set that radial deformation occurs, and then it is radially swollen to drive Elastic Cylindrical to grind axle sleeve
Swollen, it is achieved thereby that have the precise finiss of cydariform trend endoporus.The accurate grinding tool of the liquid expanding endoporus that the present invention provides can
Lathe operates, there is simple in construction, grind that axle sleeve is replaceable, easy to operate, endoporus grinding precision high and do not produces
The advantages such as shape of a saddle error, can meet the grinding demand of the endoporus of superhigh precision, have good market application foreground and popularization
It is worth.
Brief description
The accurate grinding tool of Fig. 1 liquid expanding endoporus.
Fig. 2. grind axle sleeve.
Fig. 3 plunger nut.
Fig. 4 plunger screw rod.
In figure：1 chuck；2 plunger nuts；3O RunddichtringO；4Y RunddichtringO；5 expansion sleeves；6 grinding axle sleeves；7 workpiece；8
Plunger screw rod；9 plug cocks；10 is top；11 screwed hole chambers；12 expanding arbor chambers.
Detailed description of the invention
First, plunger nut and plunger screw rod are finished
The standard component O RunddichtringO 3 of the aperture according to workpiece to be ground and selection and the dimensioned post of y-type seal ring 4
The length of the annular groove in the above U-type groove of plug face, plunger nut 2 and plunger screw rod 8 and end face rationally selection plunger screw rod 8.
2nd, expansion sleeve is finished
First the endoporus of finishing expansion sleeve 5 is to design size；Then the plunger nut 2 packaging sealing ring is loaded finishing
In the expansion sleeve 5 of the complete endoporus of work, and vertically place；Will after adding the moderately viscous antiwear hydraulic oil of 46# or 68# of appropriate amount agent
Plunger screw rod 8 screws in plunger nut 5 distance about half and flows out from oil outlet with hydraulic oil, and hydraulic oil is now described
Fill with the chamber of built-up mandrel；Then plug cock 9 screw is screwed in the chamber that oil outlet is enclosed in hydraulic oil expanding arbor
In；Screwing in plunger screw rod 8 makes the chamber of expanding arbor produce the pressure of 1～2Mpa；It is then finished to the external diameter of expansion sleeve 5 to setting
Meter size.
3rd, finish nodular cast iron and grind axle sleeve
First the endoporus of finishing nodular cast iron grinding axle sleeve 6 is to design size, then punching, fluting, chamfering；Then revolve
Go out plunger screw rod 8 to initial position, make the pressure of hydraulic oil in expanding arbor chamber reduce to 0；Grinding shaft puts from the beginning of two ends
Alternately being machined with uniform 1mm width and the groove not turned off, the length of groove is about about the 95% of grinding shaft entire length, groove blind
End is machined with the through hole that radially-arranged diameter is about 4mm；The quantity grinding axle sleeve fluting is generally 8～12；This groove is grinding
Can store grinding agent and abrasive dust during mill, the structure of one end open also allows for too much grinding agent and abrasive dust is discharged；To grind
Mill axle sleeve 6 screws plunger screw rod 8 after loading expanding arbor middle part and makes grinding axle sleeve swelling；Then finish turning grinds axle sleeve external diameter
And stay mill amount 0.1mm；The external diameter of finally fine grinding grinding axle sleeve makes its value be equal to or slightly less than inner hole of workpiece size and twice grinding
The sum of agent granular size, and control the outer diameter cylindrical degree grinding under axle sleeve duty less than 2 μm.
4th, the precise finiss of inner hole of workpiece
Workpiece 7 is enclosed within the accurate grinding tool of liquid expanding endoporus that the present invention provides, then utilizes chuck 1 He of lathe
Grinding tool is stepped up by top 10, utilizes the driving of lathe chuck 1 as grinding axle sleeve 6 rotary motion simultaneously.By grinding of preparing
Grinding agent is applied to grinding shaft and puts, and manually or automatically controls uniform speed rotation on grinding shaft set for the workpiece 7 and reciprocating translatory.Card
The rotation direction with plunger nut 2 screw thread of the direction of rotation of dish 1 is identical, makes plunger screw rod 8 and plunger nut 2 have the trend screwing.
By changing the distance of plunger screw rod 8 and plunger nut 2, the pressure of control expanding arbor chamber hydraulic oil, and then control grinding
Axle sleeve 6 and the gap of workpiece 7 endoporus.With the carrying out ground, workpiece 7 endoporus increases causes grinding with the abrasion grinding axle sleeve 6
The excesssive gap of axle sleeve and inner hole of workpiece, is increased by the hydraulic oil pressure in tightening plunger screw rod 8 and making chamber, to compensate grinding
Gap between axle sleeve 6 and workpiece 7 endoporus.
Claims (8)
1. a liquid expanding endoporus precision grinding tool, it is characterised in that include that plunger nut (2), O RunddichtringO, Y type seal
Circle, expansion sleeve (5), grinding axle sleeve (6), plunger screw rod (8), plug cock (9)；
Plunger nut (2) one end is provided with centre bore, and the other end is provided with screwed hole；The external diameter of the plunger section of plunger nut blocks more than it
The external diameter of dish gripping section, forms a pillow block between two sections；O RunddichtringO is installed on radial direction U of the plunger section of plunger nut (2)
In type annular groove, y-type seal ring is installed in the end face annular groove of the close screwed hole of plunger nut (2), prevents hydraulic fluid leak；
Expansion sleeve (5) generally drum, wall thickness is 0.8～2mm, is coated at plunger nut (2) and plunger screw rod (8) outward
Side；Expansion sleeve (5) one end is provided with a pillow block, coordinates realization axially positioning with the pillow block of plunger nut (2)；
Grinding axle sleeve (6) generally drum, being coated at the outer middle side part of expansion sleeve (5), wall thickness 2～5mm, its two ends alternately set
Having groove that is uniform and that do not turn off, the cecum of groove is the through hole more than well width for the radially-arranged diameter；
Threadeding with plunger nut (2) in plunger screw rod (8) end, forms screwed hole chamber (11) between the two；Plunger screw rod
(8) bar portion, bottom plunger nut and expansion sleeve surrounds expanding arbor chamber (12), reduce plunger screw rod by turning plunger screw rod
And the distance between plunger nut, makes the hydraulic oil pressure in expanding arbor chamber increase, thin-walled elastic expansion set is caused to occur
Radial deformation, and then drive Elastic Cylindrical grinding axle sleeve to be radially expanded, thus realize that the precision with cydariform trend endoporus is ground
Mill；Plunger screw rod (8) is provided with the oil duct connecting screwed hole chamber (11) and expanding arbor chamber (12), when plunger screw rod and post
When the relative position of plug nut changes, the hydraulic oil energy free flow in two chambers；Another O RunddichtringO is installed on post
In the U-shaped annular groove of radial direction of the plunger section of plug screw rod (8), another y-type seal ring is installed on plunger screw rod (8) near screwed hole
In end face annular groove, prevent hydraulic fluid leak；One end that on plunger screw rod (8), inflated set (5) covers is provided with an oil outlet, oil
Plug (9) is used for sealing oil outlet；It also is provided with oil duct, chamber interior when being used for refueling between expanding arbor chamber (12) and oil outlet
Air and the outflow of unnecessary hydraulic oil, also serve as the repairing passage after hydraulic fluid leak.
2. the accurate grinding tool of liquid expanding endoporus according to claim 1, it is characterised in that the non-finishing of plunger nut
Face is provided with a through hole, applies opposing torque when being used for screwing plunger screw rod.
3. the accurate grinding tool of liquid expanding endoporus according to claim 1 and 2, it is characterised in that expansion sleeve (5) endoporus
Surface roughness is not more than Ra0.4, and cylindricity is not more than 5 μm.
4. the accurate grinding tool of liquid expanding endoporus according to claim 1 and 2, it is characterised in that grind axle sleeve and use ball
Ink cast iron materials, its external diameter is equal to inner hole of workpiece size and twice abrasive particles size sum.
5. the accurate grinding tool of liquid expanding endoporus according to claim 3, it is characterised in that grind axle sleeve and use spheroidal graphite casting
Iron material, its external diameter is equal to inner hole of workpiece size and twice abrasive particles size sum.
6. the accurate grinding tool of the liquid expanding endoporus according to claim 1 or 2 or 5, it is characterised in that plunger screw rod (8)
Having external diameter to be less than the shaft part of plunger face diameter away from screw thread one end, this shaft part is provided with two parallel planes, is used for implementing folder
Hold torsion.
7. the accurate grinding tool of liquid expanding endoporus according to claim 3, it is characterised in that plunger screw rod (8) is away from spiral shell
Line one end has external diameter to be less than the shaft part of plunger face diameter, and this shaft part is provided with two parallel planes, is used for implementing clamping and reverses.
8. the accurate grinding tool of liquid expanding endoporus according to claim 4, it is characterised in that plunger screw rod (8) is away from spiral shell
Line one end has external diameter to be less than the shaft part of plunger face diameter, and this shaft part is provided with two parallel planes, is used for implementing clamping and reverses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888861.7A CN106425832B (en) | 2016-10-12 | 2016-10-12 | A kind of liquid expanding endoporus precision grinding tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888861.7A CN106425832B (en) | 2016-10-12 | 2016-10-12 | A kind of liquid expanding endoporus precision grinding tool |
Publications (2)
| Publication Number | Publication Date |
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| CN106425832A true CN106425832A (en) | 2017-02-22 |
| CN106425832B CN106425832B (en) | 2018-08-07 |
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| CN201610888861.7A Active CN106425832B (en) | 2016-10-12 | 2016-10-12 | A kind of liquid expanding endoporus precision grinding tool |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903539A (en) * | 2017-04-12 | 2017-06-30 | 沈机集团昆明机床股份有限公司 | For the air plug gauge of engine cylinder-body crankshaft hole positioning |
| CN109571233A (en) * | 2019-01-23 | 2019-04-05 | 中国科学院光电技术研究所 | A kind of axial workpiece high precision excircle milling tool |
| CN111906331A (en) * | 2020-07-07 | 2020-11-10 | 哈尔滨工业大学 | Combined expansion mandrel |
| CN112605749A (en) * | 2020-11-16 | 2021-04-06 | 中国航发西安动力控制科技有限公司 | Inner hole grinding device with two ends synchronously expanding and quantitatively adjusting |
| CN113245929A (en) * | 2021-06-01 | 2021-08-13 | 大连理工大学 | Elastic grinding shaft sleeve with radial deformation and symmetric distribution |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903539A (en) * | 2017-04-12 | 2017-06-30 | 沈机集团昆明机床股份有限公司 | For the air plug gauge of engine cylinder-body crankshaft hole positioning |
| CN109571233A (en) * | 2019-01-23 | 2019-04-05 | 中国科学院光电技术研究所 | A kind of axial workpiece high precision excircle milling tool |
| CN109571233B (en) * | 2019-01-23 | 2023-08-11 | 中国科学院光电技术研究所 | High-precision excircle grinding tool for shaft parts |
| CN111906331A (en) * | 2020-07-07 | 2020-11-10 | 哈尔滨工业大学 | Combined expansion mandrel |
| CN112605749A (en) * | 2020-11-16 | 2021-04-06 | 中国航发西安动力控制科技有限公司 | Inner hole grinding device with two ends synchronously expanding and quantitatively adjusting |
| CN113245929A (en) * | 2021-06-01 | 2021-08-13 | 大连理工大学 | Elastic grinding shaft sleeve with radial deformation and symmetric distribution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106425832B (en) | 2018-08-07 |
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Effective date of registration: 20210127 Address after: 116000 2101-0006, 21 / F, Taide building, 537 Huangpu Road, Ganjingzi District, Dalian City, Liaoning Province Patentee after: Golden teeth transmission technology (Dalian) Co.,Ltd. Address before: No.2 linggong Road, Ganjingzi District, Dalian, Liaoning, 116024 Patentee before: DALIAN University OF TECHNOLOGY |
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