CN100500365C - Method and device for producing grip ring of pipe joint and grip ring for pipe joint - Google Patents
Method and device for producing grip ring of pipe joint and grip ring for pipe joint Download PDFInfo
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- CN100500365C CN100500365C CNB2005100779327A CN200510077932A CN100500365C CN 100500365 C CN100500365 C CN 100500365C CN B2005100779327 A CNB2005100779327 A CN B2005100779327A CN 200510077932 A CN200510077932 A CN 200510077932A CN 100500365 C CN100500365 C CN 100500365C
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- metal wire
- wire rod
- pipe joint
- garter spring
- roller
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Abstract
A metal wire material suitable for use as a grip ring material, having good surface properties and produced at low cost; a producing method therefor; and a producing device therefor. For this purpose, a metal wire material (34) is passed through a shape correction unit (14) to have its coil-like winding-produced deformation removed. Further, while preventing the downward or upward turn of the metal wire material (34) by upper and lower hold rollers (19, 20, and 26, 27), a continuous wedge-like groove is formed in the metal wire material (34) by a first cutting roller (21) and a second cutting roller (23).
Description
The present invention's name that to be Kanai Hiroaki submit on July 1st, 2002 is called the dividing an application of Chinese patent application the 02802503.2nd of " garter spring with metal wire rod, this garter spring with the manufacture method of metal wire rod, this garter spring with the pipe joint of the manufacturing installation of metal wire rod, use metal wire rod with the manufacture method of garter spring, the garter spring that this pipe joint is used with the manufacturing installation and the pipe joint of garter spring ".
Technical field
The metal wire rod that the present invention relates to is the garter spring metal wire rod that is used for pipe joint, and this pipe joint is the union piece that is used to connect tubular body, and particularly the tubular body end does not need to handle, and stops the axial of tubular body that inserts from both sides to be moved.
The present invention relates to garter spring, it is used for pipe joint, and this pipe joint is the union piece that is used to connect tubular body, and the tubular body end does not need to handle, and stops the axial of tubular body that inserts from both sides to be moved.
Background technology
Use joint at the pipeline that is used for the industry machine with interconnecting of tubular body more.In order to obtain the sealing of the fastened to each other and connector portions of tubular body, various organization plans had been proposed in the past.As structure with firm fixing means, much main structures, but the efficient of pipeline operations is low with flanged type, screw-type, welded type etc., and not talkatively not have owing to exempt from the danger of the leakage that strong installation causes.
Therefore, do not need to cut the simple and easy joint that processing such as screw thread, welding can also absorb some mutual off-centre of tubular body for the most use of pipe joint portion.Simple and easy joint will be installed the packing ring and the guard ring of rubber system at the two ends of sleeve part respectively with pipe joint, guarantee the sealing of tubular body end with the elasticity of the packing ring of rubber system, only fastening coupling together between the tubular body end of cut-out former state with pipe joint.According to purposes, also at first only use each parts is sequenced, the joint of making single part is inserted from both direction divide other tubular body end, with the interconnected method of tubular body.
Above-mentioned simple and easy joint is owing to be the fastening structure of packing ring close attachment on pipeline with rubber system by pipe joint, so allow that connected tubular body is axially mobile.Yet tubular body moves and when tubular body is extracted internal flow leak, be to be breakneck under the situation of the situation of high temperature and dangerous chemical substance at internal flow, also probably cause major break down.Dimension in order to ensure safety, owing to must adopt method for distinguishing, prevents the measure that tubular body is extracted by pipeline being fixed on floor and wall etc., so because this engineering increases cost.
Therefore, shown in Fig. 1 example, as raw material, the circumferencial direction of inner face is provided with the groove 1 of wedge-like with stainless steel and iron and steel etc., and the garter spring of being made up of spring steel 2 uses as the component parts of pipe joint.Be disclosed on the public table special permission of the special table 2001-507782 communique for the pipe joint that this garter spring is housed.At this, describe according to Fig. 2.In Fig. 2, the 3rd, revolvable tab, the 4th, the tab of fixing.Garter spring 2 close attachment are engaging hooking sheet 5 in garter spring 2 one sides' end on the inner face of tab 3, the mechanism that is fastenedly connected that these hooking sheet 5 usefulness are made up of bolt 6 and nut 7 is fixed.Packing ring 8 close attachment of rubber system are on the inner face of tab 4, and the internal diameter of above-mentioned garter spring 2 and rubber system packing ring 8 forms bigger slightly than the external diameter of the tubular body that inserts this joint.Therefore, the both sides insertion tubular body as if from that pipe joint makes bolt 6 break away from from nut 7, and extracts hooking sheet 5, because the spring action of garter spring 2, wedge-like groove 1 is invaded the tubular body of insertion, can stop tubular body axial mobile.And then make the inner face rotation of tab 3, and tab 3 and tab 4 are firmly fixed with bolt 6 and nut 7 along tab 4.
Like this, if use pipe joint just not allow that tubular body is axial mobile, firmly fixed with garter spring.Existing this garter spring is with following method manufacturing.
Promptly, the metal wire rod of regulation shape is wound into coiled type, cut the metal wire rod of specific length from this wire coil, for the metal wire rod that will cut is done circlewise, carry out " bending machining ", in order to make that bending machining metal wire rod circlewise circular, two end faces of " welding " annular metal wire rod, in order to remove the thermal deformation of following welding, carry out " stress relief annealing ", for with processing wedge-like groove on the circumferencial direction of circular metal wire rod inner face such as lathe, carry out " machining ", and then carry out " weld part removing ", become discontinuum with circular metal wire rod non-individual body, obtain ring plate, at last two end faces of ring plate are implemented the operation of " cutting is handled ".
The manufacture method of like this, present garter spring needs a lot of manufacturing procedures.And the excision of welding, stress relief annealing and weld part is unnecessary operation for the processing of wedge-like groove, may not be essential operation.In addition, also have owing to the weld part excision produces the problem that the material effective rate of utilization descends.Also have surface oxidation and the variable color that takes place owing to heat treated influence, and because surface texture worsens the shortcoming that value-added content of product is descended along with welding and stress relief annealing in addition.So the manufacture method of existing garter spring, it is inevitable that manufacturing cost improves.And can not provide quality good garter spring.
The present invention makes in view of these problems that prior art has, and its purpose is to provide a kind of surface texture good, and the low garter spring metal wire rod of cost.And the objective of the invention is in addition, a kind of method that can make this garter spring with metal wire rod efficiently is provided; A kind of device of this garter spring with metal wire rod that be suitable for making is provided; Provide a kind of and can make the method for pipe joint efficiently with garter spring with metal wire rod; Provide a kind of and be suitable for making the device of this pipe joint, and the pipe joint that a kind of surface texture is good, cost is low garter spring is provided with garter spring.
Summary of the invention
In order to achieve the above object, most important characteristic of the present invention is, metal wire rod is implemented continuous machining.Owing to have this feature, be fit to do the metal wire rod cheaply garter spring material, that surface texture is good so can provide.
That is, garter spring of the present invention is characterised in that with metal wire rod, carries out warp by the metal wire rod to coiled type, the metal wire rod of warp is implemented continuous machining obtains.
Garter spring of the present invention is characterised in that with the manufacture method of metal wire rod, and the metal wire rod of coiled type is carried out warp, and the metal wire rod of warp is implemented continuous machining.
Pipe joint of the present invention is characterised in that with the manufacture method of garter spring, metal wire rod to coiled type carries out warp, metal wire rod to warp is implemented continuous machining, after the metal wire rod that will implement machining is processed into ring-type, cut into the ring plate of specific length, two end faces of the ring plate of specific length are implemented cutting handle.
Garter spring of the present invention is characterised in that to have the cutting apparatus of metal wire rod being implemented continuous machining with the manufacturing installation of metal wire rod.
Pipe joint of the present invention is characterised in that with the manufacturing installation of garter spring, comprises: cutting apparatus, and it implements continuous machining to metal wire rod; The ring processing unit (plant), its metal wire rod that will implement machining is processed into ring-type; Shearing device, it cuts into the annular metal wire rod ring plate of specific length; Topping machanism, it is used for that two end faces of the ring plate of specific length are implemented cutting and handles.
The preferably equipment shape correction unit of above-mentioned cutting apparatus, it is in order to eliminate the spooling defective of coiled type, and it is provided with at least one pair of shape correction roller and shape correction roller about at least one pair of up and down.For metal wire rod is implemented continuous machining, at least one pair of cutting roller unit preferably is set, one of them roller is the cutting roller that forms cutting edge on outer peripheral face, another is a backing roll.
At the preferably setting of the front and back of above-mentioned cutting roller unit a pair of pressure roller up and down, it is used to prevent above or below the metal wire rod crooked.
Because the present invention constitutes as described above, has following effect.
(1) according to a first aspect of the invention, can provide the garter spring metal wire rod that surface texture is good, cost is low.
(2) according to a second aspect of the invention, can provide the manufacture method that does not need a large amount of manufacturing procedures and the low garter spring of cost to use metal wire rod.
(3) according to a third aspect of the invention we, can provide does not need a large amount of manufacturing procedures and unnecessary manufacturing procedure, uses the manufacture method of the high pipe joint of low cost and material effective rate of utilization with garter spring.
(4) according to a forth aspect of the invention, can provide implementing the suitable device of the described method of a second aspect of the present invention.
(5) according to of the present invention the 5th, eight aspect, can provide the metal wire rod that can eliminate coiled type the spooling defective, metal wire rod is implemented the continuous suitable device of machining.
(6) the 6th, the 9th aspect according to the present invention, can prevent in the machining operation to above the metal wire rod or below crooked.
(7) according to a seventh aspect of the invention, can provide the device that is suitable for implementing the described method of a third aspect of the present invention.
(8) according to the tenth aspect of the invention, can provide surface texture good, the pipe joint garter spring that cost is low.
Description of drawings
Fig. 1 (a) is the side view of garter spring, Fig. 1 (b) be Fig. 1 (a) from B-B to profile, Fig. 1 (c) is the stereogram of garter spring, Fig. 1 (d) be Fig. 1 (a) from D-D to amplification profile;
Fig. 2 is to use the stereogram of the pipe joint of garter spring;
Fig. 3 is the summary construction diagram of garter spring manufacturing installation;
Fig. 4 is the side view of cutting apparatus;
Fig. 5 (a) is the expression shape correction roller up and down and the figure of metal wire rod snap-fit relationship, and Fig. 5 (b) is the shape correction roller about representing and the figure of metal wire rod snap-fit relationship;
Fig. 6 is the figure of the snap-fit relationship of expression cutting roller and metal wire rod;
Fig. 7 is the summary construction diagram of ring processing unit (plant);
Fig. 8 (a) is the figure of an embodiment of the expression state of clamping metal wire rod with pressure roller up and down, and Fig. 8 (b) is the figure of another embodiment of the expression state of clamping metal wire rod with pressure roller up and down;
Fig. 9 (a), Fig. 9 (b) are the figure of continuous machining metal wire rod top of expression and sidepiece state;
Figure 10 (a)～10 (c) be the multistage machining metal wire rod of expression the figure of state;
Figure 11 is the figure that is illustrated in the method for the ground machining that do not bend on the metal wire rod.
The specific embodiment
Embodiments of the present invention are described below with reference to accompanying drawings.But the present invention is not limited to following embodiment, can suitably change enforcement.
In Fig. 3, metal wire rod 9: it is wound into coiled type; Topping machanism 10 (garter spring metal wire rod manufacturing installation): its metal wire rod to coiled type carries out warp, and metal wire rod is implemented the groove processing of continuous wedge-like; Ring processing unit (plant) 11: its metal wire rod of having implemented the processing of wedge-like groove is processed into ring-type; Clipping apparatus 12: its annular metal wire rod that is processed into ring-type cuts into the ring plate of specific length, and it is included in the ring processing unit (plant) 11; Topping machanism 13 (for example milling machine), it is used for that two end faces of the ring plate of specific length are implemented cutting and handles.The details of cutting apparatus 10 is shown in Figure 4.The details of ring processing unit (plant) is shown in Figure 7.As the raw material of metal wire rod, when being used for garter spring, preferably use spring with stainless steel wire (particularly according to JIS-G-4314 SUS304-WPB).Its hot strength changes according to steel wire diameter, preferably 500～2000N/mm
2This is owing to following problem is arranged, if less than 500N/mm
2Insufficient strength then is if surpass 2000N/mm
2, then be difficult to insert tubular body.
Garter spring can be taken as 2～20mm with the line footpath of metal wire rod.Garter spring with metal wire rod when the continuous machining, and before being wound into coiled type, by implement fiat-machined (be configured in up and down or about shape correction roller etc. carry out straight machining), preferably make deviation (from the side-play amount of flat line) below 20mm/m.This is because following problem arranged, and the numerical value of this deviation is if surpass 20mm/m, then when machining since take place slightly vibration produce cut bad.
In Fig. 4, the 14th, the shape correction unit comprises two pairs of shape correction rollers 15,15 and 16,16 up and down, and the shape correction roller about two pairs 17,17 and 18,18.About shape correction roller 17 or 18 another in the inside of paper side.These shape correction rollers preferably have along the outer shape of the metal wire rod 34 of circular cross-section shown in Fig. 5 (a), Fig. 5 (b).This shape correction device by two pairs up and down the shape correction roller and about two pairs shape correction roller forms, also can by the shape correction roller about a pair of and a pair of about the shape correction roller form.Except that this mode, be between roller row, allow correct material by and mode that the shape of being corrected material is corrected.That is to say also and can use the roller leveller.
In Fig. 4, the 19, the 20th, be configured in the last pressure roller, the lower compression roller that cut roller unit the place ahead.These pressure rollers up and down are the same with the shape correction roller shown in Fig. 5 (a), preferably have along the outer shape of the metal wire rod 34 of circular cross-section.
In Fig. 4,21 is that the first cutting roller, 22 is that first backing roll, 23 is that the second cutting roller, 24 is second backing rolls.Present embodiment has two pairs of cutting roller units.On the outer peripheral face of the first cutting roller 21 and the second cutting roller 23, form cutting edge 25 as shown in Figure 6, be used for metal wire rod 34 is implemented the processing of wedge-like groove.In addition, first backing roll 22 is also the same with the shape correction roller shown in Fig. 5 (a) with second backing roll 24, preferably has along the outer shape of the metal wire rod 34 of circular cross-section.In Fig. 4, the first cutting roller and two cuttings of second cutting roller roller are arranged.According to circumstances, the cutting roller also can be one, also can be more than three.
In Fig. 4, the 26, the 27th, be configured in the last pressure roller, the lower compression roller that cut the roller unit rear.These pressure rollers up and down are also the same with the shape correction roller shown in Fig. 5 (a), preferably have along the outer shape of the metal wire rod 34 of circular cross-section.In addition, between the first cutting roller 21 and the second cutting roller 23, lower compression roller can be set also.
In Fig. 4, the 28th, motor, the 29th, frequency converter is with the speed of frequency converter 29 control motors 28.The 30th, synchronous belt, the 31st, idler gear, the 32nd, driving belt, the 33rd, operation board.
In Fig. 7, the metal wire rod 35 of having implemented the processing of wedge-like groove is processed into the ring processing unit (plant) of ring-type, comprising: metal wire rod inducting device 36, first guiding part 37, first mobile rollers 38 and two mobile rollers 39 and the 3rd mobile rollers 40.These mobile rollers can move along the direction of arrow with not shown operating machines for the adjustable ring footpath.
Can be processed into pipe joint garter spring as following to metal wire rod with ring processing unit (plant) and clipping apparatus and topping machanism, this metal wire rod be by as the garter spring usefulness metal wire rod manufacturing installation of the present invention manufacturing of above-mentioned structure.
The metal wire rod that is wound into coiled type is carried out warp, metal wire rod is implemented continuous machining with cutting apparatus.Promptly in Fig. 4, because the metal wire rod 34 that makes warp is eliminated the spooling defective of coiled type by correcting unit 14.And then prevent that with pressure roller 19 and 20 and 26 and 27 up and down going up of metal wire rod 34 is crooked or crooked down.With first backing roll 22 and second backing roll, 24 support metal wire rods 34, and with first the cutting roller 21 and second the cutting roller 23 on metal wire rod 34, form continuous wedge-like groove.The effect of these pressure rollers can be expected following effect: adjust the bus bar (パ ス ラ イ Application) of metal wire rod, adjust the translational speed of metal wire rod by the rotary speed of adjusting lower compression roller 20 and 27, prevent to be accompanied by vibration that machining produces etc.
The clamping force of the metal wire rod that is produced by last lower compression roller preferably makes 10N/cm in this
2More than.But if its clamping force is excessive, the translational speed of metal wire rod is adjusted difficulty.According to circumstances plastic deformation also takes place in metal wire rod sometimes, so preferably at 1000N/cm
2Below clamp.In addition, as the way of contact of pressure roller and metal wire rod, shown in Fig. 5 (a), the mode that contacts on curved surface with metal wire rod 34 is the most stable, can clamp metal wire rod.But also can be shown in Fig. 8 (a), accomplish that pressure roller 41 and lower compression roller 42 and metal wire rod 34 contact in many places, or shown in Fig. 8 (b), accomplish that pressure roller 43 and lower compression roller 44 and metal wire rod 34 carry out contacting.
In order to expect the effect of above-mentioned pressure roller, the distance at the center of cutting roller and the center of the pressure roller before and after it is preferably done shortly.Because in this if oversizely just can not expect the effect of suppressing, be preferably in below the 300mm so cut the distance at center of the pressure roller of the center of roller and its front and back.
As mentioned above, the metal wire rod of formation wedge-like groove is processed into ring-type on the ring processing unit (plant).Promptly in Fig. 7, metal wire rod 35 moves on the direction of arrow respectively by making first, second, third mobile rollers 38,39,40 through metal wire rod inducting device 36, first guiding part 37, can be adjusted to ring footpath arbitrarily.In these mobile rollers, first mobile rollers 38 and second mobile rollers 39 mainly play the adjustable ring footpath, and the 3rd mobile rollers 40 significant feature are that the discreteness of circularity is reduced, and simultaneously, also work to eliminate internal stress.Then, use the clipping apparatus 12 that is included in ring processing unit (plant) 11 shown in Figure 3 the annular metal wire rod to be cut into the ring plate of specific length.
On two end faces of this ring plate, implement cutting with topping machanism shown in Figure 3 13 and handle, obtain garter spring shown in Figure 12.With the pipe joint garter spring that method of the present invention is made, do not exist in the existing manufacture method, because problems such as surface oxidation that the operation of welding and stress relief annealing produces and variable colors, surface texture is good.
In Fig. 4, also can dispose the cutting roller, make the cutting roller 21 and second of winning cut roller 22 entirely from top machining metal wire rod 34, shown in Fig. 9 (a), after the top execution machining with the 45 pairs of metal wire rods 34 of cutting roller that are positioned at metal wire rod 34 tops, shown in Fig. 9 (b), also implement machining with the sidepiece of the 46 pairs of metal wire rods 34 of cutting roller that are positioned at metal wire rod 34 sides.And, can be as required shown in Fig. 9 (b), after the top of metal wire rod 34 and a side's sidepiece implemented machining, with metal wire rod, be configured in the cutting roller (not have to illustrate) of the side of Fig. 9 (b) opposition side the opposing party's sidepiece of metal wire rod 34 is also implemented machining.
And, also can shown in Figure 10 (a) → Figure 10 (b) → Figure 10 (c), repeatedly carry out the machining of metal wire rod 34.Like this, if repeatedly cut, because cutting output can be seldom each time, the deformation drag of metal wire rod diminishes, thereby can make the speed raising (working (machining) efficiency raising) by the wire rod of cutting apparatus.In addition, the cutting process number of times also can adopt more than four times except that three times shown in Figure 10 as required.
As shown in figure 11, metal wire rod 34 bendings also can be used lower compression roller 47 and 48 and be clamped metal wire rod 34 from the above and below securely when preventing machining, with the cutting roller 49 cutting metal wire rods 34 that are located at metal wire rod 34 sides.The 50th, motor, the driving side sprocket wheel 51 that directly is connected on the motor 50 is connected by belt 53 with slave end sprocket wheel 52, because motor 50 rotations, from sprocket wheel 51 by belt 53, through sprocket wheel 52 and transmission shaft 54, rotation is sent to cutting roller 49, metal wire rod 34 quilts are machining continuously.
In the cutting apparatus of Fig. 4, the first cutting roller 21, second cuts roller 23, goes up pressure roller 19 and 26 is driven rollers, and other roller is a driven voller.This situation both can be provided with in the place ahead of cutting apparatus and push the driving pinch roll that metal wire rod is used, and also the driving pinch roll that the drawing metal wire rod is used can be set at the rear of cutting apparatus.Push the driving pinch roll that driving pinch roll that metal wire rod uses or drawing metal wire rod are used if adopt, will have the stable advantage of linear speed.
In addition, in Fig. 3, ring processing unit (plant) 11 also can be provided with in the back of cutting apparatus 10 in continued access.After on the cutting apparatus metal wire rod being implemented continuous machining and being wound into coiled type, with the metal wire rod of this coiled type of warp and utilize the ring processing unit (plant) that is provided with in addition that metal wire rod is processed into ring-type.Then, the annular metal wire rod is cut into the ring plate of specific length.
The possibility of utilizing on the industry
Because formation of the present invention is as mentioned above such structure, is suitable as garter spring material and conduct Surface texture well, the manufacturing installation of metal wire rod cheaply.
Description of reference numerals
1... wedge-like groove, 2... garter spring, 3,4... tab, 5... hooking sheet, 6... bolt, 7... nut, 8... rubber sheet gasket, 9... coiled type metal wire rod, 10... cutting apparatus, 11... ring processing unit (plant), 12... clipping apparatus, 13... topping machanism (milling machine), 14... shape correction unit, 15,16,17, 18... shape correction roller, 19,26,41,43, the upper pressure roller of 47..., 20,27,42,44,48... Lower compression roller, the 21... first cutting roller, 22... first backing roll, the 23... second cutting roller, 24... second In the middle of backing roll, 25... cutting edge, 28... motor, 29... frequency converter, 30... synchronous belt, the 31... Gear, 32... driving belt, 33... operation board, 34,35... metal wire rod, 36... metal wire rod are led Enter device, 37... first guiding part, 38... first mobile rollers, 39... second mobile rollers, 40... the 3rd Mobile rollers, 45,46,49... cutting roller, 50... motor, 51... driving side sprocket wheel, 52... slave end Sprocket wheel, 53... belt, 54... transmission shaft.
Claims (2)
1, a kind of pipe joint manufacture method of garter spring, be to be used for the tubular body periphery of close attachment at fluid flow, for connecting pipe joint that tubular body uses manufacture method with garter spring, it is characterized in that, metal wire rod to coiled type carries out warp, and the metal wire rod of warp is implemented continuous machining, the metal wire rod of having implemented machining is processed into ring-type after, cut into the ring plate of specific length, two end faces of the ring plate of specific length are implemented cutting handle.
2, a kind of pipe joint garter spring, be to be used for the tubular body periphery of close attachment at fluid flow, for connecting the pipe joint garter spring that tubular body uses, wherein, carry out warp by metal wire rod, and the metal wire rod of warp implemented continuous machining coiled type, the metal wire rod of having implemented machining is processed into ring-type after, cut into the ring plate of specific length, two end faces of the ring plate of specific length are implemented cutting handle and obtain.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001201845 | 2001-07-03 | ||
| JP201845/01 | 2001-07-03 | ||
| JP257770/01 | 2001-08-28 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028025032A Division CN1232365C (en) | 2001-07-03 | 2002-07-01 | Grip ring metal wire material, method of producing such grip metal wire material and device for producing such grip ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1714992A CN1714992A (en) | 2006-01-04 |
| CN100500365C true CN100500365C (en) | 2009-06-17 |
Family
ID=35821304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100779327A Expired - Fee Related CN100500365C (en) | 2001-07-03 | 2002-07-01 | Method and device for producing grip ring of pipe joint and grip ring for pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100500365C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158007A (en) * | 2011-12-08 | 2013-06-19 | 苏州工业园区高登威科技有限公司 | System used for manufacturing clamp |
| CN103158006A (en) * | 2011-12-08 | 2013-06-19 | 苏州工业园区高登威科技有限公司 | System used for manufacturing clamp |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3635063A (en) * | 1968-09-26 | 1972-01-18 | Richardson A T & Sons Pty Ltd | Manufacture of ring gear and other ring blanks |
| DE2838128A1 (en) * | 1978-09-01 | 1980-03-06 | Goetze Ag | Rolled wire piston ring prodn. machine - has wire fed between rollers to non-circular forming roller and support roll |
| US4365492A (en) * | 1980-06-25 | 1982-12-28 | Intercole Bolling Corp. | Ring former and cutoff |
| EP0157537A2 (en) * | 1984-03-24 | 1985-10-09 | Ae Plc | The manufacture of piston rings |
| JP2602706B2 (en) * | 1988-10-24 | 1997-04-23 | 三井建設株式会社 | Method for manufacturing hoop streaks |
-
2002
- 2002-07-01 CN CNB2005100779327A patent/CN100500365C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3635063A (en) * | 1968-09-26 | 1972-01-18 | Richardson A T & Sons Pty Ltd | Manufacture of ring gear and other ring blanks |
| DE2838128A1 (en) * | 1978-09-01 | 1980-03-06 | Goetze Ag | Rolled wire piston ring prodn. machine - has wire fed between rollers to non-circular forming roller and support roll |
| US4365492A (en) * | 1980-06-25 | 1982-12-28 | Intercole Bolling Corp. | Ring former and cutoff |
| EP0157537A2 (en) * | 1984-03-24 | 1985-10-09 | Ae Plc | The manufacture of piston rings |
| JP2602706B2 (en) * | 1988-10-24 | 1997-04-23 | 三井建設株式会社 | Method for manufacturing hoop streaks |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1714992A (en) | 2006-01-04 |
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