CN104061087A - Oil ring and machining process thereof - Google Patents
Oil ring and machining process thereof Download PDFInfo
- Publication number
- CN104061087A CN104061087A CN201410283239.4A CN201410283239A CN104061087A CN 104061087 A CN104061087 A CN 104061087A CN 201410283239 A CN201410283239 A CN 201410283239A CN 104061087 A CN104061087 A CN 104061087A
- Authority
- CN
- China
- Prior art keywords
- oil
- face
- oil ring
- polishing
- ring
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/06—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging
- F16J9/061—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging using metallic coiled or blade springs
- F16J9/062—Coiled spring along the entire circumference
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention relates to an oil ring and a machining process of the oil ring and belongs to the technical fields of piston-ring structures and the machining of the piston-ring structures. The oil ring is mainly characterized in that a stepped oil-scraping blade is adopted; round oil holes are drilled in an oil tank and are non-uniformly arranged around the oil tank by one circle, no oil hole is drilled within the range of about 30 degrees of an opening, an inner round groove is formed by two circular arcs with different sizes and the connecting line of the two circular arcs, and the coating thickness is decreased by half as compared with that of an ordinary oil ring. The oil ring has the following advantages that (1) the service life of a piston ring is prolonged, the chrome coating thickness is the same as that of an existing oil ring, and the service life is about two times of that of the existing oil ring; (2) the elasticity can be decreased when surface pressures are equal, the frictional work loss is decreased, the fuel economy is improved, and the friction is decreased by 15 percent; (3) the round oil holes are drilled, so that the surrounding adaptability is improved; an inner-slot supporting spring is not contacted with the bottom of the slot, and a smooth oil path is facilitated, so that the oil consumption can be decreased by 50 percent, and the emission is decreased. An outer circle before plating is machined through secondary molding, so that the oil-scraping blade is guaranteed to be a sharp corner, and therefore the oil-scraping effect is improved. The oil ring has quite strong practicability and remarkable social benefit.
Description
Technical field
The present invention relates to a kind of oil ring and processing technology thereof, belong to piston ring structure and processing technique field thereof.
Background technique
In engine piston ring member, oil ring is mainly responsible for the effect of frizing, and ring body cylindrical is higher to the pressure of the unit area of inboard wall of cylinder block, and cylindrical and cylinder body stickiness are better, and spill port is more unimpeded, and frizing effect is just better.When compressive load per unit area one timing, area of contact is less, and required pressure is less, and the elastic force of ring body is less, can reduce like this frictional loss of ring and cylinder sleeve.Originally ring body spill port is process with metal slitting saw microscler, packs into after cylinder sleeve, because of the distortion of oilhole place, bad with casing wall laminating, affects frizing effect.Also have, as shown in Figure 3, inner support spring is close to ring internal groove x1, has reduced the hole of spill port, has affected oil return effect.In order to reduce frictional loss, guarantee frizing, oil return effect, simultaneously for environmental protection, reduce overlay coating thickness, need improve scraper ring cylindrical.
Summary of the invention
The invention provides a kind of oil ring and processing technology thereof, solving existing ring body is processed into microscler because spill port adopts metal slitting saw, pack into after cylinder sleeve, because of the distortion of oilhole place, bad with casing wall laminating, and inner support spring is close to ring internal groove x1, reduced the hole of spill port, affected the deficiency of oil return effect, by the present invention, be conducive to improve frizing, oil return effect, reduce frictional loss.
The object of the invention is to be achieved through the following technical solutions, a kind of oil ring, its excircle configuration has two projections, the cylindrical work ladder surface that each projection is formed by the k connecting successively, l, m face and q, r, s face forms, between two ladder surfaces to degree of depth a
4the junction surface O of place forms oil groove, it is characterized in that, on oil groove O face, prolongs and circumferentially has some spill ports; Ring body inner circle R is groove, and groove is comprised of three sections, x, the z, the y face that connect successively of symmetry.
Described spill port aperture is φ 0.5 ~ φ 3.0mm, and oil return hole count is 48-80, in the even distribution of circumferential asymmetry, in 30 ° of oil ring openings time without oilhole.
In described groove, the radius of arc Ra of x face is 0.5 ~ 3.0mm, and the radius of arc Rb of y face is 0.2 ~ 0.8mm, and Ra>Rb, and z face is for connecting the transitional surface of x face and y face.
Described technique comprises fine grinding opening, excircle polishing I, moulding plating cylindrical, excircle polishing II, middle mill opening before forming cart cylindrical before plating, plating, wears circular groove, cylindrical lapping in face grinding, thick hook, wears face grinding, moulding mill oil groove, wear face grinding, bore oilhole, essence hook in circular groove and inner circle, fine grinding opening, mill opening internal channel burr, confirm honing, face machined flat.
Before described plating, forming cart cylindrical adopts multiple operation numerically controlled lathe, comprises former and later two knife rests, and periphery k ', l ', m ', q ', r ', s ' are by two kinds of forming cutters through secondary operations moulding, and before the first, cutter is traverse feed, the whole periphery of finish turning; Second rear cutter is processed u ', l ', m ', v ', r ', s ', w ' face, has guaranteed the wedge angle at frizing place, i.e. k ' and l ' intersection place and q ' and r ' intersection place.
Described excircle polishing I adopts 3M polishing wheel to carry out to foreign round polishing, polishing wheel model MED, this flexible polishing wheel feature is existing polishing cutting ability, again can plastic deformation, can stretch into concave surface l ', m ', r ', s ' mirror polish, after throwing, roughness reaches Ra0.8, has guaranteed the roughness of cylindrical before plating.
Described excircle polishing II adopts 3M polishing wheel to carry out to foreign round polishing, polishing wheel model 5S-F, and this flexible polishing wheel feature is the polishing that is suitable for harder material, can plastic deformation, can stretch into concave surface l, m, r, s mirror polish, improve the roughness of cylindrical after plating, more than reaching Ra1.6.
Described brill oilhole adopts the processing of many drill bits of numerical control professional equipment, once can process 8 oilholes simultaneously, and drill bit can be controlled separately, and hole count can be processed into non-8 multiple, and oilhole hole pitch can be adjusted arbitrarily.
In described essence hooks, circular groove and inner circle adopt numerically controlled lathe, profile cutter, and inside groove and inner circle are processed simultaneously, i.e. x, y, z, e face cutting moulding simultaneously, has guaranteed flute profile, is conducive to guarantee groove depth size simultaneously.
Main feature of the present invention is to adopt stepped frizing sword, and frizing sword H5 width is 0.05 ~ 0.15mm, and whole frizing sword H3 width is 0.15 ~ 0.35mm; Bore circular oilhole in oil groove, ring body one week is non-uniform, and within the scope of approximately 30 ° of openings, without oilhole, inner circle groove is comprised of two sections of vary in size circular arc and lines thereof.The more common oil ring of thickness of coating reduces half, has the following advantages: (1) has extended the working life of piston ring, identical chromium layer thickness, and be approximately 2 times of existing oil ring working life; (2) face presses elastic force when identical to reduce, the merit that reduces to rub loss, and fuel economy improves, and reduces friction 15%; (3) bore circular oilhole, ring body compliance improves, and inside groove support spring does not contact bottom land, is conducive to oil circuit unimpeded, can reduce oil consumption 50%, discharge minimizing.Before plating, cylindrical utilizes post-forming process, has guaranteed that frizing sword place is wedge angle, has improved frizing effect.The present invention has very strong practicability and significant social benefit.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the present invention;
Fig. 2 is that A-A in Fig. 1 is to structural representation;
Fig. 3 is existing oil ring cross section structure schematic diagram;
In Fig. 1,2, A
1for the radial distance of frizing sword ladder surface l (or r), A
2for frizing sword ladder surface l and m face (or r and s face) radial distance sum, H
1high for encircling, H
2be the distance between two frizing swords, H
3, H
5frizing tread degree, a
4the oil groove degree of depth, α
1for the angle of frizing sword madial wall and end face B, α
2for the angle of frizing sword outer side wall and end face B, α
3for the angle of frizing sword ladder surface m (or s) with periphery k (or q) face, α
5for the angle of frizing sword ladder surface l (or r) with periphery k (or q), Ra is inner circle support spring groove diameter, and φ d is oilhole diameter, and C is thickness of coating.
Embodiment:
Further illustrate in conjunction with the accompanying drawings and embodiments the present invention, as shown in Figure 1, 2, excircle configuration has two projections to structure of the present invention, and the cylindrical work ladder surface that each projection is formed by the k connecting successively, l, m face and q, r, s face forms frizing sword; The degree of depth a of two cylindrical work ladder surface sidewalls
4place forms oil groove with O face, prolongs circumferential brill circular hole on oil groove O face, i.e. spill port, one week uneven distribution of ring body, within the scope of approximately 30 ° of openings without oilhole.Ring body inner circle hooks groove, and flute profile forms by three sections, i.e. x, y, z face, and x face is orthodrome, and y face is small arc-shaped, and z face connects x face and y face by straight line.The frizing cutlery that cylindrical work ladder surface forms has following parameter:
(1) width of cylindrical work ladder surface k (q face is identical), i.e. H
5scope between 0.05 ~ 0.15mm.Guaranteed to keep high surface pressure simultaneously under low elastic force, reduced oil consumption approximately 50%, reduced frictional work and lost approximately 15%, because engine friction horsepower loss 60 ~ 70% is from oil ring.Guaranteed workability simultaneously.
(2) axial dimension of cylindrical work ladder surface l (r face is identical), i.e. A
1scope exist: between 0.02 ~ 0.06mm, guaranteed the ring body slow-decay that scope inner face is pressed in working life.The angle (r face is identical) of l face and cylindrical k face, i.e. α
5for: 35 ° ~ 55 °, guaranteed the smooth and easy of oil circuit and the cloth oil to cylinder sleeve, i.e. frizing, cloth oil, avoids dry friction again.Extend the working life of piston ring.
(3) the axial width sum of cylindrical work ladder surface k, l, m (q, r, s face identical), i.e. H
3be between 0.15 ~ 0.35mm.Increase the service life approximately one times.
(4) angle (s face is identical) of cylindrical work ladder surface m and periphery k, i.e. α
3between 0 ° ~ 10 °.Guaranteed the intensity of frizing sword.
(5) the sidewall j of cylindrical work ladder surface and the angle of ring body end face B (t face is identical), i.e. α
2it is 20 °～30 °; The angle (p face is identical) of sidewall n face and ring body end face B, i.e. α
1be 15 °～25 °, improved workability, reduced the de-chromium of frizing sword, improved the percentage of A-class goods.
(6) cylindrical work ladder surface k is to the distance of o face at the bottom of middle groove, i.e. a
4size is between 0.25 ~ 0.50mm.Guaranteed that oil circuit is unimpeded, improved the rigidity of ring body simultaneously.
(7) oilhole external diameter is φ 0.5 ~ φ 3.0mm.48 ~ 80 of hole counts, ring body one week is non-uniform, within the scope of approximately 30 ° of openings, without oilhole, improves opening rigidity, better laminating casing wall and reduce opening leakage of oil amount while guaranteeing by compression gas.
(8) inner circle flute profile is comprised of three sections of symmetry, and orthodrome Ra forms x face, and small arc-shaped Rb forms y face, and two arc transition are linked as z face.Orthodrome x face is for inner support spring, and inner support spring does not contact with small arc-shaped y face, has increased like this drainback passage, is conducive to oil return.Circular arc R a radius is 0.5 ~ 3.0mm, and radius of arc Rb scope is 0.2 ~ 0.8mm.And Ra>Rb.
(9) excircle configuration thickness of coating C is 0.03～0.10mm.Guaranteed the coating Economy within working life.Consider finished product thickness of coating and machining allowance, coating scattered error etc., than normal plating, can reduce chromium layer thickness 0.05mm, reduced cost.
The processing method that realizes oil ring structure shape comprises following process step: forming cart cylindrical before plating; Fine grinding opening before plating; Excircle polishing I; Moulding plating cylindrical; Excircle polishing II; Middle mill opening; Wear face grinding; Circular groove in thick hook; Cylindrical lapping; Wear face grinding; Moulding mill oil groove; Wear face grinding; Bore oilhole; Circular groove and inner circle in essence hooks; Fine grinding opening; Mill opening internal channel burr; Confirm honing; Face machined flat.
Forming cart cylindrical before plating: be to adopt multiple operation numerically controlled lathe, comprise former and later two knife rests.Periphery k ', l ', m ', q ', r ', s ' are by two kinds of forming cutters through secondary operations moulding, and first cutter (front cutter) is traverse feed, the whole periphery of finish turning (being k ', the q ' face after moulding); Second cutter (rear cutter) processing u ', l ', m ', v ', r ', s ', w ' face.Solved like this defect that k ' and l ' intersection point place and q ' and r ' intersection point place cannot guarantee wedge angle, guaranteed the wedge angle at frizing place, k ' and l ' intersection place and q ' and r ' intersection place guarantee wedge angle.Otherwise cannot guarantee to be wedge angle herein.
Excircle polishing I is to adopt 3M polishing wheel to carry out to foreign round polishing, polishing wheel model MED, and this flexible polishing wheel feature is existing polishing cutting ability, again can plastic deformation, can stretch into concave surface l ', m ', r ', s ' mirror polish, after throwing, roughness reaches Ra0.8, has guaranteed the roughness of cylindrical before plating.
Excircle polishing II is to adopt 3M polishing wheel to carry out to foreign round polishing, polishing wheel model 5S-F, and this flexible polishing wheel feature is the polishing that is suitable for harder material, can plastic deformation, can stretch into concave surface l, m, r, s mirror polish, improve the roughness of cylindrical after plating, more than reaching Ra1.6.
Bore oilhole and adopt the processing of many drill bits of numerical control professional equipment, once can process 8 oilholes simultaneously, drill bit can be controlled separately, and hole count can be processed into non-8 multiple, and hole pitch can be adjusted arbitrarily.
In essence hooks, circular groove and inner circle adopt numerically controlled lathe, profile cutter, and inside groove and inner circle are processed simultaneously, and x, y, z, the cutting moulding simultaneously of e face one cutter, guaranteed flute profile, is conducive to guarantee groove depth size simultaneously.
Claims (9)
1. an oil ring, its excircle configuration has two projections, the cylindrical work ladder surface that each projection is formed by the k connecting successively, l, m face and q, r, s face forms, between two ladder surfaces to degree of depth a
4the junction surface O of place forms oil groove, it is characterized in that, on oil groove O face, prolongs and circumferentially has some spill ports; Ring body inner circle R is groove, and groove is comprised of three sections, x, the z, the y face that connect successively of symmetry.
2. oil ring according to claim 1, is characterized in that, described spill port aperture is φ 0.5 ~ φ 3.0mm, and oil return hole count is 48-80, in the even distribution of circumferential asymmetry, within the scope of 30 ° of oil ring openings without spill port.
3. oil ring according to claim 1, is characterized in that, in described groove, the radius of arc Ra of x face is 0.5 ~ 3.0mm, and the radius of arc Rb of y face is 0.2 ~ 0.8mm, and Ra>Rb, and z face is for connecting the transitional surface of x face and y face.
4. realize the processing technology of oil ring described in claim 1, it is characterized in that, described technique comprises fine grinding opening, excircle polishing I, moulding plating cylindrical, excircle polishing II, middle mill opening before forming cart cylindrical before plating, plating, wears circular groove, cylindrical lapping in face grinding, thick hook, wears face grinding, moulding mill oil groove, wear face grinding, bore oilhole, essence hook in circular groove and inner circle, fine grinding opening, mill opening internal channel burr, confirm honing, face machined flat.
5. the processing technology of oil ring according to claim 4, it is characterized in that, before described plating, forming cart cylindrical adopts multiple operation numerically controlled lathe, comprise former and later two knife rests, periphery k ', l ', m ', q ', r ', s ' by two kinds of forming cutters through secondary operations moulding, before the first, cutter is traverse feed, the whole periphery of finish turning; Second rear cutter is processed u ', l ', m ', v ', r ', s ', w ' face, has guaranteed the wedge angle at frizing place, i.e. k ' and l ' intersection place and q ' and r ' intersection place.
6. the processing technology of oil ring according to claim 4, it is characterized in that, described excircle polishing I adopts 3M polishing wheel to carry out to foreign round polishing, polishing wheel model MED, this flexible polishing is taken turns existing polishing cutting ability, again can plastic deformation, can stretch into concave surface l ', m ', r ', s ' mirror polish, after throwing, roughness reaches Ra0.8, has guaranteed the roughness of cylindrical before plating.
7. the processing technology of oil ring according to claim 4, it is characterized in that, described excircle polishing II adopts 3M polishing wheel to carry out to foreign round polishing, polishing wheel model 5S-F, this flexible polishing wheel is suitable for the polishing of harder material, can plastic deformation, can stretch into concave surface l, m, r, s mirror polish, improved the roughness of cylindrical after plating, more than reaching Ra1.6.
8. the processing technology of oil ring according to claim 4, is characterized in that, described brill oilhole adopts the processing of many drill bits of numerical control professional equipment, once can process eight oilholes simultaneously, drill bit can be controlled separately, and hole count can be processed into non-eight multiple, and oilhole hole pitch can be adjusted arbitrarily.
9. the processing technology of oil ring according to claim 4, is characterized in that, in described essence hooks, circular groove and inner circle adopt numerically controlled lathe, profile cutter, inside groove and inner circle are processed simultaneously, be the cutting moulding simultaneously of x, y, z, e face, guaranteed flute profile, be conducive to guarantee groove depth size simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410283239.4A CN104061087A (en) | 2014-06-24 | 2014-06-24 | Oil ring and machining process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410283239.4A CN104061087A (en) | 2014-06-24 | 2014-06-24 | Oil ring and machining process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104061087A true CN104061087A (en) | 2014-09-24 |
Family
ID=51548977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410283239.4A Pending CN104061087A (en) | 2014-06-24 | 2014-06-24 | Oil ring and machining process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104061087A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257826A (en) * | 2015-04-27 | 2016-01-20 | 仪征亚新科双环活塞环有限公司 | Oil scraper ring |
| CN107088738A (en) * | 2017-04-18 | 2017-08-25 | 资阳中车传动有限公司 | A kind of axis products surface accurate curved-surface processing method |
| EP3232094A4 (en) * | 2014-12-11 | 2018-08-08 | Kabushiki Kaisha Riken | Oil ring |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5820131A (en) * | 1996-01-29 | 1998-10-13 | Teikoku Piston Ring Co., Ltd. | Piston ring having wear coating consisting of Cr2 N or a mixture of Cr2 N and Cr |
| CN102518529A (en) * | 2011-12-28 | 2012-06-27 | 仪征双环活塞环有限公司 | External circle contour shape of oil ring and machining method for external circle contour shape |
| CN202690243U (en) * | 2012-05-29 | 2013-01-23 | 中外合资安庆帝伯格茨活塞环有限公司 | Arc-shaped and conical-surface piston oil ring |
| US20130049305A1 (en) * | 2010-04-19 | 2013-02-28 | Nippon Piston Ring Co., Ltd | Internal combustion engine oil ring |
| CN203412669U (en) * | 2013-08-12 | 2014-01-29 | 重庆江润活塞环有限责任公司 | Plane hasp type energy-saving environment protection piston ring oil ring |
-
2014
- 2014-06-24 CN CN201410283239.4A patent/CN104061087A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5820131A (en) * | 1996-01-29 | 1998-10-13 | Teikoku Piston Ring Co., Ltd. | Piston ring having wear coating consisting of Cr2 N or a mixture of Cr2 N and Cr |
| US20130049305A1 (en) * | 2010-04-19 | 2013-02-28 | Nippon Piston Ring Co., Ltd | Internal combustion engine oil ring |
| CN102518529A (en) * | 2011-12-28 | 2012-06-27 | 仪征双环活塞环有限公司 | External circle contour shape of oil ring and machining method for external circle contour shape |
| CN202690243U (en) * | 2012-05-29 | 2013-01-23 | 中外合资安庆帝伯格茨活塞环有限公司 | Arc-shaped and conical-surface piston oil ring |
| CN203412669U (en) * | 2013-08-12 | 2014-01-29 | 重庆江润活塞环有限责任公司 | Plane hasp type energy-saving environment protection piston ring oil ring |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3232094A4 (en) * | 2014-12-11 | 2018-08-08 | Kabushiki Kaisha Riken | Oil ring |
| US10197160B2 (en) | 2014-12-11 | 2019-02-05 | Kabushiki Kaisha Riken | Oil ring |
| CN105257826A (en) * | 2015-04-27 | 2016-01-20 | 仪征亚新科双环活塞环有限公司 | Oil scraper ring |
| WO2016173171A1 (en) * | 2015-04-27 | 2016-11-03 | 仪征亚新科双环活塞环有限公司 | Oil scraper ring |
| CN107088738A (en) * | 2017-04-18 | 2017-08-25 | 资阳中车传动有限公司 | A kind of axis products surface accurate curved-surface processing method |
| CN107088738B (en) * | 2017-04-18 | 2020-12-29 | 资阳中工机车传动有限公司 | Method for machining precise curved surface on surface of shaft product |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104061087A (en) | Oil ring and machining process thereof | |
| CN102518677A (en) | Technology for processing outer ring of automobile gearbox bearing | |
| CN111002003B (en) | Efficient and long-service-life hydraulic valve main hole machining method | |
| CN203843706U (en) | Engine valve forming CBN grinding wheel | |
| CN204565933U (en) | A kind of emery wheel for grinding valve | |
| CN104174910B (en) | Milling type min-cutter cutting process | |
| CN104588785B (en) | Inner-cooling type hobbing cutter | |
| CN102518529A (en) | External circle contour shape of oil ring and machining method for external circle contour shape | |
| CN104526585B (en) | A kind of emery wheel for grinding valve and the method for grinding valve | |
| CN102554810B (en) | Anti-deformation special-shaped grinding wheel | |
| CN104439397B (en) | A kind of processing method of High-precision Deep Hole composite drill | |
| KR20140121416A (en) | Highly efficient cutting and grinding wheel designed to retain its shape | |
| CN207953362U (en) | A kind of numerical control knife tower height pressure cooling water outlet structure | |
| CN203448756U (en) | Thin walled pipe cutting clamp | |
| CN212635435U (en) | Accurate quick hydraulic extrusion slide valve fine metering hole anchor clamps | |
| CN203843705U (en) | Multipurpose formed CBN grinding wheel for valve | |
| CN209349637U (en) | It is a kind of to rush overlap cutter for valve | |
| CN204108419U (en) | Interior cold fluted drill | |
| CN104439335A (en) | Novel hard alloy molding knife | |
| CN203003665U (en) | Grinding head lathe tool | |
| CN104259794A (en) | Manufacturing process beneficial to piston ring quality | |
| CN202984702U (en) | Combined tool for processing strip ring of round die for triangular belt vulcanization | |
| CN205342021U (en) | Drill bit with diamond dust granule | |
| CN205684802U (en) | A kind of round nose milling cutter | |
| CN219012492U (en) | Diamond impregnated tooth composite drill bit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140924 |