CN108772503A - A kind of tooling and its application method for heavy amount in machining piston ring - Google Patents

A kind of tooling and its application method for heavy amount in machining piston ring Download PDF

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Publication number
CN108772503A
CN108772503A CN201810606612.3A CN201810606612A CN108772503A CN 108772503 A CN108772503 A CN 108772503A CN 201810606612 A CN201810606612 A CN 201810606612A CN 108772503 A CN108772503 A CN 108772503A
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CN
China
Prior art keywords
jacking block
piston ring
interior
work
oil cylinder
Prior art date
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CN201810606612.3A
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Chinese (zh)
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CN108772503B (en
Inventor
王志伟
茆骏亚
肖静岚
李杨绪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CRRC Qishuyan Institute Co Ltd
Changzhou CRRC Diesel Engine Parts Co Ltd
Original Assignee
Changzhou Zhongche Diesel Engine Parts Co Ltd
CRRC Qishuyan Institute Co Ltd
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Application filed by Changzhou Zhongche Diesel Engine Parts Co Ltd, CRRC Qishuyan Institute Co Ltd filed Critical Changzhou Zhongche Diesel Engine Parts Co Ltd
Priority to CN201810606612.3A priority Critical patent/CN108772503B/en
Publication of CN108772503A publication Critical patent/CN108772503A/en
Application granted granted Critical
Publication of CN108772503B publication Critical patent/CN108772503B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00Making other particular articles
    • B21D53/16Making other particular articles rings, e.g. barrel hoops
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10Bending specially adapted to produce specific articles, e.g. leaf springs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/22Auxiliary equipment, e.g. positioning devices

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The invention belongs to frock clamp fields, more particularly to a kind of tooling and its application method for heavy amount in machining piston ring, tooling includes operation console, it is fixed with clamping cylinder, work on operation console into oil cylinder and positions ring gauge, clamping cylinder is set on the inside of positioning ring gauge, and work is set into oil cylinder on the outside of positioning ring gauge, and the periphery for positioning ring gauge is equipped with top pressure notch, the piston external part of clamping cylinder is fixed with interior jacking block, and the piston external part of work into oil cylinder is fixed with outer jacking block;Interior jacking block width, top pressure notch chord length and outer jacking block width successively decrease successively, are equipped with interior heavy gap between the interior jacking block and the cambered surface of top pressure notch when being in top pressure state, interior heavy gap is more than piston ring radial thickness.The beneficial effects of the invention are as follows:Molding can be made by carrying out clod wash using tooling, the piston ring with certain interior heavy amount be made, time saving and energy saving, automatization level is high, improves production efficiency.

Description

A kind of tooling and its application method for heavy amount in machining piston ring
Technical field
The invention belongs to frock clamp fields, and in particular to a kind of for the tooling of heavy amount and its use in machining piston ring Method.
Background technology
In engineering, certain piston rings are designed with interior heavy amount, i.e., in cold conditions, both ends of the surface at gap-clearance of piston rings slightly to In be recessed certain distance.In working condition, expanded by heating, and can be with inboard wall of cylinder liner fitting.Currently, processing not yet both at home and abroad The equipment and technique of heavy amount in piston ring, bend, time-consuming and laborious, low production efficiency, and indent amount is big often by manual It is small not easy to control.
Invention content
The purpose of the present invention is overcoming the prior art, there are heavy amounts in machining piston ring, time-consuming and laborious, low production efficiency Defect, provide it is a kind of carrying out clod wash using tooling and can make molding, be made with the heavy piston ring measured in certain, time saving province Power, automatization level is high, improves the tooling and its application method for heavy amount in machining piston ring of production efficiency.
The technical solution adopted by the present invention to solve the technical problems is:A kind of work for heavy amount in machining piston ring Dress comprising operation console is fixed with the locating ring of clamping cylinder, work into oil cylinder and for cuff on the outside of piston ring on operation console Rule, clamping cylinder are set on the inside of positioning ring gauge, and work is set into oil cylinder on the outside of positioning ring gauge, and the periphery for positioning ring gauge is equipped with top Notch, the piston external part of clamping cylinder is pressed to be fixed with interior jacking block, the piston external part of work into oil cylinder is fixed with outer jacking block, interior top Block and outer jacking block are towards top pressure notch relative motion;On parallel position, interior jacking block width, top pressure notch chord length and outer jacking block are wide Degree successively decreases successively, is equipped with interior heavy gap between the interior jacking block and the cambered surface of top pressure notch when being in top pressure state, interior heavy gap is big In piston ring radial thickness.
Specifically, after piston ring is installed in the tooling of the present embodiment, on parallel position, interior jacking block width, top pressure lack Mouth chord length, outer jacking block width and gap-clearance of piston rings width successively decrease successively;The indent amount for the piston ring that the present invention makes is less than interior Heavy gap.
The tooling for heavy amount in machining piston ring of the present invention uses following steps at work:
The first step:According to the nominal diameter of piston ring and interior heavy amount design requirement, first Design Orientation ring gauge, interior jacking block and outer Jacking block;
Second step:Each component is assembled, adjusts work into oil cylinder and clamping cylinder operating pressure and delay time;Wherein Operating pressure is determined according to the yield strength of piston ring material to be processed;
Third walks:Piston ring to be processed is assembled, opening is aligned to the indentation, there of positioning ring gauge;
4th step:After startup, work is automatically performed into work steps such as the pressurizations, pressurize, release of oil cylinder and clamping cylinder, is made In outer jacking block top pressure gap-clearance of piston rings to the front center plane of interior jacking block;
5th step:Operating interval about 30s, change the outfit next group of piston ring after the completion.
Using the work of hydraulic control into oil cylinder and clamping cylinder, the piston, it can be achieved that different size is adjusted in operating pressure The amount of sinking requires in ring.The present invention carries out clod wash using tooling can make molding, and the piston ring with certain interior heavy amount is made, saves Shi Shengli, automatization level is high, improves production efficiency, the interior heavy amount size of piston ring obtained is accurate, high-quality.
Specifically, the arc that interior jacking block matches towards the front end both sides of top pressure notch with the inner headed face of piston ring to be processed The front center in face, interior jacking block towards top pressure notch is the plane parallel with top pressure notch chord length.When the front end both sides of interior jacking block Tip-cambered overlay tightly on the inner headed face of former piston ring after, the spacing of the front center plane of interior jacking block and former piston ring inner circle face The as indent amount of piston ring, it is simple in structure, it is molded convenient for the indent of piston ring.According to the piston ring of different size, pass through tune The contact area and moving displacement of whole interior jacking block and outer jacking block, the amount of sinking in different piston rings that may be implemented require.
Preferably, the tolerance of the cambered surface radius of curvature of interior jacking block front end both sides is 0.5mm, interior jacking block machining accuracy is suitable It makes, it is convenient for production, and the indent Forming Quality of piston ring is not influenced.
Further, interior jacking block releasable connection is on the piston external part of clamping cylinder, outer jacking block releasable connection in work into On the piston external part of oil cylinder;Releasable connection mode is preferably bolted, and is facilitated according to the piston rings of different radial thickness more The interior jacking block for changing different size replaces the interior jacking block of different size and outer jacking block according to the opening width size of different piston rings, It is applied widely.
Further, lubber-line is scored on the table top of operation console, lubber-line is overlapped with the center line of top pressure notch;Assembly When piston ring to be processed, the opening center line of piston ring can be directed at lubber-line, installation site is more accurate, in gap-clearance of piston rings Recessed molding processing quality is high.
Specifically, operation console lower part is equipped with bin, is equipped in bin for driving clamping cylinder and work into the hydraulic pressure of oil cylinder Power unit, hydraulic power unit are set to the tooling lower part of the present invention, and hydraulic power unit includes hydraulic station, electronic control member Part etc., hydraulic pressure delivery conduit is short, and integrated setting, mounting structure is simple, is convenient for hydraulic control.Using the work oil inlet of hydraulic control Cylinder and clamping cylinder, operating pressure is adjustable, according to the piston ring of different size, by adjusting the interior jacking block and outer top to match Different interior heavy amount requirements may be implemented to the pressure of piston ring in block.
In addition, a kind of application method for the tooling of heavy amount in machining piston ring comprising following steps:
S1:The piston ring of interior heavy amount to be processed is matched in positioning ring gauge, and the opening center line of piston ring is aligned Lubber-line;
S2:It drives the piston rod of clamping cylinder to stretch out, keeps the cambered surface of interior jacking block front end both sides and piston ring inner circle face paste tight;
S3:The piston rod for driving work into oil cylinder stretches out, and makes outer jacking block top pressure gap-clearance of piston rings to the front center of interior jacking block In plane;
S4:After clamping cylinder and work keep load to dwell time into oil cylinder, work makes outer jacking block be reset into oil cylinder release Initial position;
S5:Clamping cylinder release makes interior jacking block be reset to initial position, takes out piston ring.
This method realizes that the opening clod wash indent of piston ring is molded by hydraulic control clamping cylinder and work into oil cylinder, operation Simply, automatization level is high, improves production efficiency.
Further, this method further includes the pre-treatment step before step S1:According to the nominal diameter of piston ring and Interior heavy amount design requirement installs the positioning ring gauge, interior jacking block and outer jacking block to match, adjusts clamping cylinder and work into the dynamic of oil cylinder Make delay time;According to the yield strength of piston ring material to be processed, adjust clamping cylinder and work into oil cylinder operating pressure.Before Phase presetting parameter, the piston ring indent amount of different size easy to process, indent formed precision are high.
The present invention's is a kind of for sinking the tooling of amount in machining piston ring and its advantageous effect of application method is:
1. the present invention is using the work of hydraulic control into oil cylinder and clamping cylinder, operating pressure is adjustable, it can be achieved that different rule The amount of sinking requires in the piston ring of lattice;
2. the present invention carries out clod wash using tooling can make molding, the piston ring with heavy amount in certain is made, it is time saving Laborsaving, automatization level is high, improves production efficiency;
3. the interior heavy amount size of piston ring obtained is accurate, high-quality.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a kind of vertical view for the tooling of heavy amount in machining piston ring of the present invention;
Fig. 2 is the partial enlarged view of part A in Fig. 1;
Fig. 3 is a kind of complete section schematic diagram for the tooling of heavy amount in machining piston ring of the present invention;
Fig. 4 is a kind of vertical view for the interior jacking block of the tooling of heavy amount in machining piston ring of the present invention.
Wherein:1. operation console;2. clamping cylinder;3. work is into oil cylinder;4. positioning ring gauge, 401. top pressure notches;Jacking block in 5.; 6. outer jacking block;Heavy gap in 7.;8. piston ring;9. lubber-line;10. bin;11. hydraulic power unit.
Specific implementation mode
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with Illustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant to the invention.
A kind of specific embodiment for the tooling of heavy amount in machining piston ring of the present invention as Figure 1-Figure 4, Including operation console 1, clamping cylinder 2, work are fixed on operation console 1 into oil cylinder 3 and for cuff in the locating ring in 8 outside of piston ring Rule 4, clamping cylinder 2, which is set to, positions 4 inside of ring gauge, and work is into oil cylinder 3 on 4 outside of positioning ring gauge, the periphery of positioning ring gauge 4 Equipped with top pressure notch 401, the piston external part of clamping cylinder 2 is fixed with interior jacking block 5, and the piston external part of work into oil cylinder 3 is fixed There are outer jacking block 6, interior jacking block 5 and outer jacking block 6 towards 401 relative motion of top pressure notch;On parallel position, 5 width of interior jacking block, top Pressure 401 chord length of notch and 6 width of outer jacking block successively decrease successively, the cambered surface of interior jacking block 5 and top pressure notch 401 when in top pressure state Between be equipped with interior heavy gap 7, interior heavy gap 7 be more than 8 radial thickness of piston ring.
Specifically, after piston ring 8 is installed in the tooling of the present embodiment, on parallel position, 5 width of interior jacking block, top pressure 401 chord length of notch, 6 width of outer jacking block and 8 opening width of piston ring are successively decreased successively, and the piston ring 8 of the present embodiment making is interior Recessed amount is less than interior heavy gap 7.
The tooling for heavy amount in machining piston ring of the present embodiment uses following steps at work:
The first step:According to the nominal diameter of piston ring 8 and interior heavy amount design requirement, first Design Orientation ring gauge 4, interior jacking block 5 With outer jacking block 6;
Second step:Each component is assembled, adjusts work into oil cylinder 3 and 2 operating pressure of clamping cylinder and delay time;Its Middle operating pressure is determined according to the yield strength of 8 material of piston ring to be processed;
Third walks:Piston ring 8 to be processed is assembled, opening is aligned to the indentation, there of positioning ring gauge 4;
4th step:After startup, it is automatically performed work into work steps such as the pressurizations, pressurize, release of oil cylinder 3 and clamping cylinder 2, Make in 6 top pressure piston ring 8 of outer jacking block opening to the front center plane of interior jacking block 5;
5th step:Operating interval about 30s, change the outfit next group of piston ring 8 after the completion.
Using the work of hydraulic control into oil cylinder 3 and clamping cylinder 2, the work, it can be achieved that different size is adjusted in operating pressure The amount of sinking requires in plug ring 8.The present embodiment carries out clod wash using tooling can make molding, and the piston with certain interior heavy amount is made Ring 8, time saving and energy saving, automatization level is high, improves production efficiency;The interior heavy amount size of piston ring obtained is accurate, high-quality.
Specifically, interior jacking block 5 towards the front end both sides of top pressure notch 401 be inner headed face phase with piston ring 8 to be processed The front center of the cambered surface matched, interior jacking block 5 towards top pressure notch 401 is the plane parallel with 401 chord length of top pressure notch.When interior top The front end both sides tip-cambered of block 5 overlay tightly on the inner headed face of former piston ring 8 after, the front center plane and original of interior jacking block 5 are lived The spacing of 8 inner headed face of plug ring is the indent amount of piston ring 8, simple in structure, is molded convenient for the indent of piston ring 8.According to difference Different pistons may be implemented by adjusting the contact area and moving displacement of interior jacking block 5 and outer jacking block 6 in the piston ring 8 of specification The amount of sinking requires in ring 8.
Preferably, the tolerance of the cambered surface radius of curvature of 5 front end both sides of interior jacking block is 0.5mm, 5 machining accuracy of interior jacking block is suitable Preferably make, it is convenient for production, and the indent Forming Quality of piston ring 8 is not influenced.
Further, 5 releasable connection of interior jacking block is on the piston external part of clamping cylinder 2, and 6 releasable connection of outer jacking block is in work Into on the piston external part of oil cylinder 3;Releasable connection mode is preferably bolted, and facilitates the piston ring according to different radial thickness The interior jacking block 5 of 8 replacement different sizes replaces 5 He of interior jacking block of different size according to the opening width size of different piston rings 8 Outer jacking block 6, it is applied widely.
Further, lubber-line 9, the center line weight of lubber-line 9 and top pressure notch 401 are scored on the table top of operation console 1 It closes;When assembling piston ring 8 to be processed, the opening center line of piston ring 8 can be directed at lubber-line 9, installation site is more accurate, living The molding processing quality of the opening indent of plug ring 8 is high.
Specifically, 1 lower part of operation console is equipped with bin 10, is equipped in bin 10 for driving clamping cylinder 2 and work into oil cylinder 3 Hydraulic power unit 11, hydraulic power unit 11 is set to the tooling lower part of the present embodiment, and hydraulic power unit 11 includes liquid Station, electronic control component etc. are pressed, hydraulic pressure delivery conduit is short, and integrated setting, mounting structure is simple, is convenient for hydraulic control.Using For the work of hydraulic control into oil cylinder 3 and clamping cylinder 2, operating pressure is adjustable, according to the piston ring 8 of different size, by adjusting Different interior heavy amount requirements may be implemented to the pressure of piston ring 8 in the interior jacking block 5 and outer jacking block 6 to match.
In addition, a kind of application method for the tooling of heavy amount in machining piston ring comprising following steps:
S1:The piston ring 8 of interior heavy amount to be processed is matched in positioning ring gauge 4, and by the opening center line pair of piston ring 8 Neat lubber-line 9;
S2:It drives the piston rod of clamping cylinder 2 to stretch out, makes the cambered surface and 8 inner circle face paste of piston ring of 5 front end both sides of interior jacking block Tightly;
S3:The piston rod for driving work into oil cylinder 3 stretches out, and makes 6 top pressure piston ring 8 of outer jacking block opening to the front end of interior jacking block 5 In middle plane;
S4:After clamping cylinder 2 and work keep load to dwell time into oil cylinder 3, work keeps outer jacking block 6 multiple into 3 release of oil cylinder Position is to initial position;
S5:2 release of clamping cylinder makes interior jacking block 5 be reset to initial position, takes out piston ring 8.
This method realizes that the opening clod wash indent of piston ring 8 is molded by hydraulic control clamping cylinder 2 and work into oil cylinder 3, Easy to operate, automatization level is high, improves production efficiency.
Further, this method further includes the pre-treatment step before step S1:According to the nominal diameter of piston ring 8 and Interior heavy amount design requirement installs the positioning ring gauge 4, interior jacking block 5 and outer jacking block 6 to match, adjusts clamping cylinder 2 and work into oil cylinder 3 action delay time;According to the yield strength of 8 material of piston ring to be processed, adjust clamping cylinder 2 and work into oil cylinder 3 work Make pressure.Early period presetting parameter, the 8 indent amount of piston ring of different size easy to process, indent formed precision is high.
It should be appreciated that specific embodiment described above is only used for explaining the present invention, it is not intended to limit the present invention.By The obvious changes or variations that the spirit of the present invention is extended out are still in the protection scope of this invention.

Claims (8)

1. a kind of tooling for heavy amount in machining piston ring, it is characterised in that:Including operation console (1), on the operation console (1) Clamping cylinder (2), work are fixed with into oil cylinder (3) and is used for positioning ring gauge (4) of the cuff on the outside of piston ring (8), the clamping Oil cylinder (2) is set on the inside of positioning ring gauge (4), and the work is set into oil cylinder (3) on the outside of positioning ring gauge (4), the positioning ring gauge (4) Periphery be equipped with top pressure notch (401), the piston external part of the clamping cylinder (2) is fixed with interior jacking block (5), the work Piston external part into oil cylinder (3) is fixed with outer jacking block (6), the interior jacking block (5) and outer jacking block (6) towards top pressure notch (401) relative motion;On parallel position, interior jacking block (5) width, top pressure notch (401) chord length and outer jacking block (6) width Successively decrease successively, interior heavy gap (7), institute are equipped between the interior jacking block (5) and the cambered surface of top pressure notch (401) when being in top pressure state It states interior heavy gap (7) and is more than piston ring (8) radial thickness.
2. a kind of tooling for heavy amount in machining piston ring according to claim 1, it is characterised in that:The interior jacking block (5) it is the cambered surface to match with the inner headed face of piston ring to be processed (8) towards the front end both sides of top pressure notch (401), it is described interior The front center of jacking block (5) towards top pressure notch (401) is the plane parallel with top pressure notch (401) chord length.
3. a kind of tooling for heavy amount in machining piston ring according to claim 2, it is characterised in that:The interior jacking block (5) tolerance of the cambered surface radius of curvature of front end both sides is 0.5mm.
4. a kind of tooling for heavy amount in machining piston ring according to claim 2, it is characterised in that:The interior jacking block (5) releasable connection is on the piston external part of clamping cylinder (2), and outer jacking block (6) releasable connection is in work into the work of oil cylinder (3) It fills on external part.
5. a kind of tooling for heavy amount in machining piston ring according to claim 4, it is characterised in that:The operation console (1) lubber-line (9) is scored on table top, the lubber-line (9) overlaps with the center line of top pressure notch (401).
6. a kind of tooling for heavy amount in machining piston ring according to claim 1, it is characterised in that:The operation console (1) lower part is equipped with bin (10), is equipped in the bin (10) for driving clamping cylinder (2) and work into the hydraulic pressure of oil cylinder (3) Power unit (11).
7. a kind of application method according to claim 6 for the tooling of heavy amount in machining piston ring, which is characterized in that Include the following steps:
S1:The piston ring (8) of interior heavy amount to be processed is matched in positioning ring gauge (4), and by the opening center line of piston ring (8) Alignment line (9);
S2:It drives the piston rod of clamping cylinder (2) to stretch out, makes the cambered surface and piston ring (8) inner headed face of interior jacking block (5) front end both sides It is adjacent to;
S3:The piston rod for driving work into oil cylinder (3) stretches out, and makes outer jacking block (6) top pressure piston ring (8) opening to interior jacking block (5) In front center plane;
S4:After clamping cylinder (2) and work keep load to dwell time into oil cylinder (3), work makes outer jacking block into oil cylinder (3) release (6) it is reset to initial position;
S5:Clamping cylinder (2) release makes interior jacking block (5) be reset to initial position, takes out piston ring (8).
8. it is according to claim 7 for sink in machining piston ring amount tooling application method, which is characterized in that further include Pre-treatment step before step S1:According to the nominal diameter of piston ring (8) and interior heavy amount design requirement, determining of matching is installed The action delay time of position ring gauge (4), interior jacking block (5) and outer jacking block (6), adjustment clamping cylinder (2) and work into oil cylinder (3);Root According to the yield strength of piston ring to be processed (8) material, the operating pressure of adjustment clamping cylinder (2) and work into oil cylinder (3).
CN201810606612.3A 2018-06-12 2018-06-12 A kind of tooling and its application method for amount heavy in machining piston ring Active CN108772503B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112045030A (en) * 2020-09-03 2020-12-08 朱伟人 Manufacturing process of piston sealing assembly of fuel engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU648303A1 (en) * 1976-12-23 1979-02-25 Предприятие П/Я А-7676 Apparatus for making annular articles
JPS60172773A (en) * 1984-02-16 1985-09-06 Teikoku Piston Ring Co Ltd Highly durable piston ring and method of manufacturing thereof
JPH04360723A (en) * 1991-06-04 1992-12-14 Riken Corp Manufacture of piston ring
CN201253665Y (en) * 2008-09-08 2009-06-10 常熟市飞达汽车保养工具设备有限公司 Iron ring processing device
CN203972665U (en) * 2014-06-24 2014-12-03 安庆联控机电科技发展有限公司 A kind of piston ring pipe-expanding machine material-pulling device
CN204953739U (en) * 2015-08-26 2016-01-13 安徽振达刷业有限公司 A processingequipment for having concave groove ring

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU648303A1 (en) * 1976-12-23 1979-02-25 Предприятие П/Я А-7676 Apparatus for making annular articles
JPS60172773A (en) * 1984-02-16 1985-09-06 Teikoku Piston Ring Co Ltd Highly durable piston ring and method of manufacturing thereof
JPH04360723A (en) * 1991-06-04 1992-12-14 Riken Corp Manufacture of piston ring
CN201253665Y (en) * 2008-09-08 2009-06-10 常熟市飞达汽车保养工具设备有限公司 Iron ring processing device
CN203972665U (en) * 2014-06-24 2014-12-03 安庆联控机电科技发展有限公司 A kind of piston ring pipe-expanding machine material-pulling device
CN204953739U (en) * 2015-08-26 2016-01-13 安徽振达刷业有限公司 A processingequipment for having concave groove ring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112045030A (en) * 2020-09-03 2020-12-08 朱伟人 Manufacturing process of piston sealing assembly of fuel engine
CN112045030B (en) * 2020-09-03 2022-05-24 山东振挺精工活塞有限公司 Manufacturing process of piston sealing assembly of fuel engine

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