CN101466957B - Shell needle bearing with seal ring and its manufacturing method - Google Patents
Shell needle bearing with seal ring and its manufacturing method Download PDFInfo
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- CN101466957B CN101466957B CN2007800211585A CN200780021158A CN101466957B CN 101466957 B CN101466957 B CN 101466957B CN 2007800211585 A CN2007800211585 A CN 2007800211585A CN 200780021158 A CN200780021158 A CN 200780021158A CN 101466957 B CN101466957 B CN 101466957B
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Abstract
The present invention provides a drawn cup needle roller bearing and a manufacture method thereof, wherein the drawn cup needle roller bearing (30) having a seal ring comprises: a shell (31) having a raceway surface (31a) on an inner circumferential face and also having inward flange portions (31b), (31c) in both end portions; a cage (32) having a plurality of pockets (32a) in a circumferential direction and worked by cutting; a plurality of needles (33) retained in the pockets (32a) so that the needles freely rotate along the raceway surface (31a); and a seal ring (34), the shape of which is cylindrical, arranged inside the shell (31) between an end face (32b) of the cage (32) and the inward flange portion (31b). The seal ring (34) composes a floating seal and is formed by press working. Due to the foregoing, an excellent dimensional accuracy can be provided and a quantity of lubricant passing through the bearing can be controlled.
Description
Technical field
The present invention relates to have the needle bearing and the production method thereof of seal ring.
Background technique
In the past, automatic transmission was used sliding bearing (bearing shell) more, but for the burn-back countermeasure of bearing shell and low torqueization and substitute drawn cup needle roller bearing.
As drawn cup needle roller bearing, be known that realized the bearing depth of section reach 1.5～2.5mm thin-walled property bearing and in order to make the bearing (for example, with reference to patent documentation 1～3) that has seal ring with the perforation oil mass of the oiling agent of bearing shell same level.
Particularly, drawn cup needle roller bearing 100 shown in Figure 21 possesses: the shell outer ring of rib (band) 101, retainer 102, a plurality of needle roller 103 have bearing depth of section and the diameter of axle of 17～33mm about 1.5mm.In addition; Drawn cup needle roller bearing 110 shown in Figure 22 is except possessing shell 111, retainer 112, a plurality of needle roller 113; Also possess the depth of section that has about 2mm and connect the seal ring 114 of oil mass, have the bearing depth of section of 3～3.5mm and the diameter of axle of 13～43mm with control.
Patent documentation 1: (Japan) spy opens flat 6-294418 communique
Patent documentation 2: (Japan) spy opens the 2000-291669 communique
Patent documentation 3: the openly flat 6-23776 communique of (Japan) practicality
But, in above-mentioned drawn cup needle roller bearing, will run into following problem.In like the drawn cup needle roller bearing 100 that Figure 21 put down in writing; Require control to connect oil mass; On the other hand; In like the drawn cup needle roller bearing 110 that Figure 22 put down in writing, because seal ring 114 is carried out cutting, and there is the problem of required precision such as the internal diameter circularity that can not produce seal ring and internal diameter size tolerance.
Summary of the invention
The present invention sets up in view of above-mentioned situation, and its purpose is to provide a kind of drawn cup needle roller bearing and production method thereof with seal ring, and it possesses good dimensional accuracy, can control the perforation oil mass.
(1) a kind of drawn cup needle roller bearing with seal ring possesses:
Shell, it has roller surface at inner peripheral surface or outer circumferential face, has lip part at two end part; Retainer, it has a plurality of oily pockets running through circumferencial direction;
A plurality of needle rollers, it remains in above-mentioned each oily pocket with the mode of rolling freely along above-mentioned roller surface; And
The cylindrical shape seal ring, its inboard or outside at above-mentioned shell is set between the end face and above-mentioned lip part of above-mentioned retainer, it is characterized in that,
Above-mentioned seal ring constitutes floating seal, the moulding through punch process.
Like (1) described drawn cup needle roller bearing, it is characterized in that (2) above-mentioned seal ring is not heat-treated after through above-mentioned punch process moulding with seal ring.
Like (1) described drawn cup needle roller bearing, it is characterized in that (3) above-mentioned seal ring carries out Wear-resistant Treatment after through above-mentioned punch process moulding with seal ring.
Like (1) described drawn cup needle roller bearing, it is characterized in that (4) above-mentioned retainer is a resin-made cage with seal ring.
(5) a kind of production method with drawn cup needle roller bearing of seal ring, wherein above-mentioned drawn cup needle roller bearing with seal ring possesses: shell, it has roller surface at inner peripheral surface or outer circumferential face, has lip part at two end part; Retainer, it has a plurality of oily pockets running through circumferencial direction; A plurality of needle rollers, it remains in above-mentioned each oily pocket with the mode of rolling freely along above-mentioned roller surface; And the cylindrical shape seal ring, it is set in the inboard of above-mentioned shell or the outside between the lip part of end face and above-mentioned shell of above-mentioned retainer, and this production method is characterised in that, through punch process above-mentioned seal ring is carried out moulding.
Drawn cup needle roller bearing and production method thereof with seal ring of the present invention comes seal ring is carried out moulding through utilizing punch process, can make seal ring obtain good dimensional accuracy, prevents the wearing and tearing that cause with contacting of component.In addition, owing to have seal ring, thereby can control the perforation oil mass.In addition, because seal ring is floating seal, thereby compares with contact seal and can realize low torqueization.
In addition, owing to seal ring is not heat-treated after the moulding utilizing punch process, thereby also can realize cost degradation.
Moreover, because seal ring is through punch process and the laggard capable Wear-resistant Treatment of moulding, thereby can prevent to cause the wearing and tearing of seal ring because of sliding contact with the lip part of the end that is arranged at shell.In addition, as long as use the nitriding of sub zero treatment just to handle can not only to prevent the distortion of the seal ring that accompanies with Wear-resistant Treatment but also can improve wear resistance as Wear-resistant Treatment, and then can highi degree of accuracy making thin-walled seal ring.
In addition, through retainer is made resin-made cage, can be easily and cheaply be produced in the metallic retainer oily pocket moulding especially for the thin-walled retainer of the processing difficulties of the pawl that keeps needle roller.
Description of drawings
Fig. 1 is the sectional drawing that the drawn cup needle roller bearing with seal ring of an embodiment of the present invention is shown.
Fig. 2 is the sectional drawing of manufacturing procedure that first embodiment of seal ring is shown, Fig. 2 (A) expression blank sheet metal, the operation of Fig. 2 (B) expression stamping-out inner-diameter portion whose; The operation of Fig. 2 (C) expression plunging; The operation of Fig. 2 (D) expression compre sion molding, the operation of Fig. 2 (E) expression excision cylindrical part, the operation of Fig. 2 (F) expression attenuate stretching internal diameter; The operation of Fig. 2 (G) expression excision overlap part, the operation that Fig. 2 (H) expression secondary attenuate stretches.
Fig. 3 is the sectional drawing of manufacturing procedure that second embodiment of seal ring is shown; Fig. 3 (A) indicating panel is around base material, and Fig. 3 (B) representes the operation of stamping-out inner-diameter portion whose, the operation of Fig. 3 (C) expression flange; The operation of Fig. 3 (D) expression compre sion molding; The operation that Fig. 3 (E) expression excision is cylindric, the operation of Fig. 3 (F) expression attenuate stretching internal diameter, the operation of Fig. 3 (G) expression excision overlap.
Fig. 4 is that second embodiment excises operation and the follow-up sectional drawing that returns the employed punch assembly of embedding operation thereof.
Fig. 5 is carrying out order expression excision operation and the follow-up sectional drawing that returns the embedding operation thereof according to processing, and Fig. 5 (A) is the phase diagram before the processing, and Fig. 5 (B) is the course of working sectional drawing, and Fig. 5 (C) is the phase diagram that circle is returned to the original state of coiling base material.
Fig. 6 is attenuate stretching process and the follow-up sectional drawing that returns the employed punch assembly of embedding operation thereof among second embodiment.
Fig. 7 representes attenuate stretching process and the follow-up sectional drawing that returns the embedding operation thereof according to the carrying out order of processing, and Fig. 7 (A) is the phase diagram before the processing, and Fig. 7 (B) is the course of working sectional drawing, and Fig. 7 (C) is the phase diagram that circle is returned to the original state of coiling base material.
Fig. 8 is the sectional drawing of the 3rd embodiment's manufacturing procedure of expression seal ring; Fig. 8 (A) indicating panel is around base material, and Fig. 8 (B) representes the operation of stamping-out internal diameter, the operation of Fig. 8 (C) expression plunging; The operation of Fig. 8 (D) expression compre sion molding; The operation that Fig. 8 (E) expression excision is cylindric, the operation of Fig. 8 (F) expression attenuate stretching internal diameter, the operation of Fig. 8 (G) expression excision overlap.
Fig. 9 is the sectional drawing of the 4th embodiment's manufacturing procedure of expression seal ring; Fig. 9 (A) indicating panel is around base material, and Fig. 9 (B) representes the operation of stamping-out internal diameter, the operation of Fig. 9 (C) expression plunging; The operation of Fig. 9 (D) expression compre sion molding; The operation that Fig. 9 (E) expression excision is cylindric, the operation of Fig. 9 (F) expression attenuate stretching internal diameter, the operation of Fig. 9 (G) expression excision overlap.
Figure 10 is the sectional drawing of the 5th embodiment's manufacturing procedure of expression seal ring; Figure 10 (A) expression blank sheet metal, the operation of Figure 10 (B) expression stamping-out internal diameter, the operation of Figure 10 (C) expression plunging; The operation that Figure 10 (D) expression excision is cylindric, the operation that Figure 10 (E) expression is cold rolling.
Figure 11 is the profile of the mode of execution of the cold rolling processing of expression.
Figure 12 is the X II-X II sectional drawing of Figure 11.
Figure 13 (A) is the enlarged view of X III portion of Figure 12 of the state of the cold rolling processing of expression before beginning, (B) is the enlarged view of X III portion of Figure 12 of the state after the expression processing.
Figure 14 is the sectional drawing of the 6th embodiment's manufacturing procedure of expression seal ring; Figure 14 (A) expression blank sheet metal; The operation of Figure 14 (B) expression stamping-out internal diameter, the operation of Figure 14 (C) expression plunging, Figure 14 (D) forms the operation of angle R portion; The operation that Figure 14 (E) expression excision is cylindric, the operation that Figure 14 (F) expression is cold rolling.
Figure 15 is the X V portion enlarged view of Figure 14 (D).
Figure 16 (A) is the enlarged view same with Figure 13 of the state before the cold rolling processing of expression begins, and Figure 16 (B) is the enlarged view same with Figure 13 of the state after the expression processing.
Figure 17 is the chart of measurement result of the dynamic torque of expression drawn cup needle roller bearing and bearing shell.
Figure 18 is the chart of measurement result of the perforation oil mass of expression drawn cup needle roller bearing and bearing shell.
Figure 19 is to condition of molding and the chart that has or not the external diameter circularity of the retainer of annealing in process to compare.
Figure 20 is the chart of the amount of warpage of the seal ring after the expression Wear-resistant Treatment.
Figure 21 is the sectional drawing of the existing drawn cup needle roller bearing of expression.
Figure 22 is the sectional drawing that expression has another existing drawn cup needle roller bearing of the seal ring after the cutting.
Symbol description
30: drawn cup needle roller bearing with seal ring
31: shell
31a: roller surface
31b, 31c: inward flange (lip part)
32: retainer
32a: oily pocket
32b: the end face of retainer
33: needle roller
34: seal ring
Embodiment
Below, with the drawn cup needle roller bearing with seal ring of a present invention will be described in detail with reference to the accompanying mode of execution.
Drawn cup needle roller bearing 30 with seal ring is configured between the train of gearings in the automatic transmission, between gear shaft and the frame or the side of oil pump gear first-class.As shown in Figure 1, this drawn cup needle roller bearing 30 comprises: shell (outer ring with rib) 31, retainer 32, a plurality of needle roller 33, cylindrical shape seal ring 34, and the unshowned axle of its rotatably support (perhaps inner loop component).
At this, retainer 32 is made of metal, and this metal can be the steel of SPCC, S10C, AISI-1010, SCM415, SK5, SUJ2 for example, and it is processed through the method for welding, punching press or cutting.In addition; Can come retainer 32 is implemented the heat treatment of carbonitridingization and salt bath nitrocarburizing processing (diffusion carburizing) with the mode identical with conventional method; Yet; Under the situation of the needle bearing that will be applied to the 40mm or the above diameter of axle, because the distortion that the heat treatment that retainer 32 is carried out causes possibly make needle roller 33 creep into the space between the outer diametric plane of roller surface 31a and retainer 32 than thin retainer.Therefore, in order to suppress to cause distortion by heat treatment, retainer 32 adopts diffusion carburizing SQ (Single quench) processing, NV nitriding processing etc.
When retainer 32 is formed from a resin, can use polyamide 46, polyamide 66, PPS (polyphenylene sulfide) etc.Polyamide 46 can use under 150 ℃ temperature continuously, and also can under moment reaches 170 ℃ situation, use.Polyamide 66 can use under 120 ℃ temperature, and PPS can use under 200 ℃ temperature.In order to improve mechanical strength, in each resin material, sneak into 20～30% glass fibre.
When the bearing depth of section of drawn cup needle roller bearing 30 was 1.5～2.5mm left and right sides, the thickness of retainer is less to be 1mm or following.Through becoming the thin-walled retainer with above-mentioned resin-shaped, compare with metal retainer, can be formed for keeping the pawl of oily pocket and needle roller at an easy rate.
For example, for the retainer that is formed from a resin 32 that this internal diameter is 45mm, require accurate circularity.Have the retainer that high-precision resin is processed in order to make, after retainer was carried out injection-molded moulding, it was effective carrying out annealing in process.
Drawn cup needle roller bearing 30 is processed very thin as follows.The height of the cross section of this needle bearing is 1.0～3.5mm, is preferably 1.5～2.5mm, 1.5～2.0mm more preferably, and the diameter of axle is preferably 100mm or following.The depth of section that is arranged on the seal ring 34 in the shell 31 is 0.8～1.8mm.Owing to have the seal ring 34 of above-mentioned size and dimension is through punch process (in this mode of execution, being following size Control operation, attenuate stretching process, secondary attenuate stretching process) or the cold rolling type that processes.Therefore, because work-hardening improves surface hardness.Thereby, can not heat-treat (Quenching Treatment, temper) in subsequent handling and make sealing circle 34.Therefore, under the situation of the distortion that does not have heat treatment to cause, sealing circle 34 dimensional accuracies are very high.For example, according to the needs such as condition that use drawn cup needle roller bearing 30, also can carry out processing such as nitriding to improve wear resistance to seal ring 34.
Particularly, seal ring 34 for example forms through following processing method.
(first embodiment's processing method)
In the situation of this processing method, at first, to shown in Fig. 2 (A) as the processing sheet metal 1 by Mild Sheet Steel, corrosion resistant plate and implement piercing of blank, obtain shown in Fig. 2 (B) have circular hole 2 first subsequent use in the middle of blank 3.Then, through this first subsequent use middle blank 3 is implemented full Zhou Zhecheng around its circular hole 2 with respect to above-mentioned sheet metal 1 rectangular plunging processing.From the above mentioned, obtain shown in Fig. 2 (C) have cylindric 4 second subsequent use in the middle of blank 5.The volume of the seal ring that this volume ratio of cylindric 4 will be made is big.Especially, this cylindric 4 length in the axial direction is bigger than the seal ring length in the axial direction that will make.
To above-mentioned second subsequent use in the middle of cylindric 4 of blank 5, in follow-up size Control operation, implement plastic working, and will this cylindric 4 make the first middle cylinder blank 6 shown in Fig. 2 (D).In above-mentioned size Control operation, carry out operation as follows.
The mould that possesses the inner peripheral surface (not shown) cylindraceous of the internal diameter with regulation in use limits above-mentioned cylindric 4 outer circumferential face; Do not limit under the state of this inner peripheral surface of cylindric 4 simultaneously; Extruding (axially compressing while plastic deformation takes place) cylindric 4 is to become desired size in the axial direction; Promptly; Be provided with concentrically with respect to one another and axially move with close to each other/away from pair of planar between (for example, being formed between the front-end face of receiver section portion and the pressing mold that is embedded in this mould of end inner peripheral surface of above-mentioned mould), process the axial dimension of seal ring.
Along with the plastic deformation of carrying out by this way of axially compressing, at specified value, simultaneously, inwardly expanding in the overlap footpath, and obtains the above-mentioned first middle circle tubular blank 6 with above-mentioned cylindric 4 external diameter and axle direction size Control.The internal diameter size of this first middle circle tubular blank 6 is less than the internal diameter size of the seal ring that will make.
Under the situation of mode of execution shown in Figure 2, shown in Fig. 2 (E), after forming the above-mentioned first middle circle tubular blank 6, excise operation, from above-mentioned sheet metal 1 this first middle circle tubular blank 6 of excision.This excision operation is processed through the stamping-out that uses stamping press and is carried out.
Like this, the above-mentioned first middle circle tubular blank 6 from above-mentioned sheet metal 1 excision is implemented internal diameter size is expanded to the attenuate stretch process of reference value (internal diameter size of the seal ring that will obtain).In the operation of implementing this attenuate stretch process; Limit the outer circumferential face of the above-mentioned first middle circle tubular blank 6 with the mode that external diameter is enlarged; The tube reducing drift that simultaneously, will have suitable (consistent with the internal diameter size of the seal ring that will obtain) outside dimension is pressed into the internal side diameter of this first middle circle tubular blank 6 from axial one distolateral (upside of Fig. 2 (F)).Through being pressed into of such tube reducing drift; Make the overlap of the interior circumferential portion that is present in the above-mentioned first middle circle tubular blank 6 converge in axle direction another distolateral (downside of Fig. 2 (F)); Obtain the second middle circle tubular blank 8 shown in Fig. 2 (F), the inner peripheral surface of this second middle circle tubular blank 8 in this axial the other end has the overlap blade of a sword portion 7 of inward flange shape.
This second middle circle tubular blank 8 is delivered to following overlap remove operation, remove above-mentioned overlap blade of a sword portion 7.Remove in the operation at this overlap; Insert the inboard of this second middle circle tubular blank 8 through the blanking punch that will have suitable (consistent) outside dimension with the internal diameter size of the seal ring that will obtain; Remove above-mentioned overlap blade of a sword portion 7, obtain the seal ring 34 shown in Fig. 2 (G).
In addition; The operations of sealing circle 34 also can finish in above-mentioned Fig. 2 (G) stage; But if the internal diameter or the proterties of the inner peripheral surface of the above-mentioned seal ring 34 that is difficult to reach desired in this Fig. 2 (G) stage; Then shown in Fig. 2 (H), can carry out also that with the tube reducing mould secondary attenuate that the inner peripheral surface of above-mentioned seal ring 34 grinds is stretched.
In a word, the seal ring 34 that obtains be admitted to sealing circle 34 implement regulation processing be different from other operation of the present invention.About sending into the sealing circle 34 of other operation as stated, its external diameter, axial dimension and internal diameter are adjusted at appropriate value respectively.Therefore, need not cut axial end portion through turning etc.In addition, as extrusion process, needing or not carry out the processing of big operating force yet, thereby can the manufacture cost of above-mentioned seal ring 34 suppressed very low.
This first embodiment's processing method, but industrial mass ground produce internal diameter, external diameter, axle direction size restrictions in the seal ring 34 of specified value, and can constitute, and can use does not increase the manufacturing of the processing device of operating cost with low cost.Promptly; The seal ring 34 that obtains; Since in the size Control operation with external diameter and axle direction size restrictions in reference value; Remove operation through attenuate stretching process and overlap internal diameter size is limited to reference value, thereby need not cut axial end portion, can obtain making these each sizes all to reach the high-precision cylindric seal ring 34 of arbitrary standards value through turning etc.
(second embodiment's processing method)
Fig. 3～7 expressions, second embodiment's processing method.This routine situation is through carrying out the operation shown in Fig. 3 (A) → (G) successively, sheet metal 1 being processed into seal ring 34.It is identical with the situation of first embodiment's processing method that this operation comes down to.In addition, under this routine situation, can also carry out the sort of secondary attenuate stretching process shown in above-mentioned Fig. 2 (H).This example is characterised in that, as above-mentioned sheet metal 1, uses and is seen off by unshowned uncoiler, is wound in the also strip sheet metal of unshowned winder, carries out the operation shown in above-mentioned Fig. 3 (A) → (G) in order.Promptly; Synchronous with the carrying out of processing; According to for carry out each operation in abutting connection with the interval of each processing device of configuration balanced mutually spacing (separation/distance=integer) intermittence see the sheet metal 1 of above-mentioned strip off, simultaneously, carry out the operation shown in above-mentioned Fig. 3 (A) → (G) in order.
Therefore; Under this routine situation; No matter which procedure shown in above-mentioned Fig. 3 (A) → (G) is not to run through the sheet metal 1 that whole width cuts off above-mentioned strip, but along with the carrying out of the operations of seal ring 34 comes order to see the sheet metal 1 of above-mentioned strip off.And; On the above-mentioned strip sheet metal 1 of pulling out from uncoiler; In the cut-out operation shown in Fig. 3 (E); Under the situation that has formed second circular hole 10 bigger, so that the width direction two end part mode connected to one another of this sheet metal 1 is guaranteed the width dimensions (establishing the diameter of width dimensions＞second circular hole 10) of this sheet metal 1 than the circular hole shown in Fig. 3 (B) 2.And; After the processing of implementing regulation; Again will be in above-mentioned cut-out operation the first middle circle tubular blank 6 (and second middle circle tubular blank 8 of making in following operation) behind the inboard stamping-out of above-mentioned second circular hole 10 go back to the inboard that is embedded into above-mentioned second circular hole 10; Then, along with the conveying of above-mentioned sheet metal 1, send into the processing device of the operation below carrying out.With regard to the operation shown in above-mentioned Fig. 3 (A) → (G); As stated, because identical with the operation shown in above-mentioned Fig. 2 (A) → (G), thereby the explanation of omission repetition; Below, be that the center describes with the point of carrying out above-mentioned time embedding in order to carry out the operation shown in above-mentioned Fig. 3 (A) → (G) in order.
It is to carry out through processing device shown in Figure 4 that excision operation shown in Fig. 3 (E) reaches back the embedding operation.In this processing device as shown in Figure 4; At the upper surface of punch die 14 cylindraceous with applying between the lower surface of the pressure die 12 that goes up and down under the state of elastic force downwards and compress above-mentioned sheet metal 1; Simultaneously; Through drift 13 the above-mentioned first middle circle tubular blank 6 is pressed in the above-mentioned punch die 14, this first middle circle tubular blank 6 is separated with above-mentioned sheet metal 1.In addition, the internal side diameter of above-mentioned punch die 14 be provided with apply to above the bounce-back mould 15 of elastic force, the elastic force that can apply to the top the above-mentioned first middle circle tubular blank 6.But above-mentioned bounce-back mould 15 is according to the butt joint of the lower end surface of butt joint regulating block that is arranged at upper central portion 16 and above-mentioned drift 13, below when this drift 13 descends, keeping out of the way.
Use the excision operation shown in Fig. 3 (E) of above-mentioned processing device shown in Figure 4 to be undertaken by the order shown in Fig. 5 (A) → (C) with time embedding operation.At first, shown in Fig. 5 (A), the above-mentioned first middle circle tubular blank 6 that still engages with above-mentioned sheet metal 1 is embedded in the upper end portion of above-mentioned punch die 14.Then; Along with making the following and above-mentioned drift 13 of above-mentioned pressure die 12, the pressure head 17 that constitutes above-mentioned processing machine descends; Shown in Fig. 5 (B); Between the upper surface of the lower surface of pressure die 12 and above-mentioned punch die 14, compress above-mentioned sheet metal 1, through above-mentioned drift 13 the above-mentioned first middle circle tubular blank 6 is pressed in the above-mentioned punch die 14 simultaneously.Consequently, excise this first middle circle tubular blank 6 down, meanwhile, on above-mentioned sheet metal 1, form second circular hole 10 from above-mentioned sheet metal 1.Carrying out after this cuts apart, when above-mentioned pressure die 12 and above-mentioned drift 13 rise along with above-mentioned pressure head 17, shown in Fig. 5 (C), the above-mentioned pressure die 15 that is descended by 13 extruding of this drift is being risen.Consequently, through this pressure die 15, the above-mentioned first middle circle tubular blank 6 is pressed in above-mentioned second circular hole 10, and is maintained at the inboard of this second circular hole 10.So, move through making above-mentioned sheet metal 1, the above-mentioned first middle circle tubular blank 6 is sent into the following attenuate stretching process shown in Fig. 3 (F) reach back the embedding operation.
Attenuate stretching process shown in this Fig. 3 (F) reaches back the embedding operation, is to carry out through processing device shown in Figure 6.In this processing device shown in Figure 6; Apply to above the lower surface of the upper surface that holds mould 18 and the cylindric tube reducing punch die 20 that goes up and down of elastic force between above-mentioned sheet metal 1 is compressed; Meanwhile, through annular punch 19 the above-mentioned first middle circle tubular blank 6 is pressed in the above-mentioned tube reducing punch die 20.Above-mentioned annular punch 19 can carry out holding the up-down that mould was opened in 18 minutes with this at the above-mentioned internal side diameter that holds mould 18, and to above applied under the state of elastic force and be provided with.In addition, the internal side diameter that holds mould 19 in above-mentioned annular is fixed with tube reducing drift 21, and this tube reducing drift 21 is used for the inner peripheral surface of the above-mentioned first middle circle tubular blank 6 is handled to make the second middle circle tubular blank 8.Above-mentioned annular punch 19 liftably be arranged at this tube reducing drift 21 around, and maximum ascending amount receives the restriction of engaging of the outer circumferential face of inner circumferential surface and this tube reducing drift 21.Particularly, shown in Fig. 6 and Fig. 7 (A), above-mentioned maximum ascending amount is following state,, makes above-mentioned holding under the maximum states that rise of mould 18 that is, makes the upper end edge of above-mentioned annular punch 19 lean on the position of below a little in the upper surface that holds mould 18 than this.Moreover, be provided with the bounce-back mould 22 that applies elastic force downwards at the internal side diameter of above-mentioned punch die 20.
Use the attenuate stretching process shown in Fig. 3 (F) of above-mentioned processing device shown in Figure 6 to reach back the embedding operation, carry out according to the order shown in Fig. 7 (A) → (C).At first, shown in Fig. 7 (A), remaining in the above-mentioned first middle circle tubular blank 6 under the state of inboard of above-mentioned second circular hole 10, to be embedded in above-mentioned upper end portion of holding mould 18 inboard, makes its lower end surface be connected to the last ora terminalis of above-mentioned annular punch 19.Then; Shown in Fig. 7 (B); Above-mentioned tube reducing punch die 20 and above-mentioned bounce-back mould 22 are descended with the pressure head that constitutes above-mentioned processing machine 24; Below the lower surface of this tube reducing punch die 20 is pressed into above-mentioned sheet metal 1, extract the above-mentioned first middle circle tubular blank 6 out from above-mentioned second circular hole 10 up, send into the internal side diameter of above-mentioned tube reducing punch die 20 through above-mentioned annular punch 19.Thus, the internal side diameter at the above-mentioned first middle circle tubular blank 6 of the internal side diameter that is sent to tube reducing punch die 20 along with this tube reducing punch die 20 is further descended with above-mentioned pressure head 23, inserts above-mentioned tube reducing drift 21.Consequently, the internal diameter of the above-mentioned first middle circle tubular blank 6 is limited to given size, meanwhile, makes overlap portion converge at the inner peripheral surface upper end portion, make the above-mentioned second middle circle tubular blank 8 that the inner peripheral surface upper end portion is formed with overlap blade of a sword portion 7 (Fig. 3 (F)).Thus; After forming this second middle circle tubular blank 8; If above-mentioned tube reducing punch die 20 is risen with above-mentioned pressure head 23; Then make by the above-mentioned sheet metal 1 of 20 extruding of this tube reducing drift and decline and rise, meanwhile, above-mentioned bounce-back mould 22 is descended with respect to above-mentioned tube reducing drift 20 with the above-mentioned mould 18 that holds.At this moment; This bounce-back mould 22 pushes the above-mentioned overlap blade of a sword 7 (with reference to Fig. 3 (F)) of portion of the upper end portion inner peripheral surface that just has been formed at the above-mentioned second middle circle tubular blank 8 downwards; Therefore, the above-mentioned second middle circle tubular blank 8 is pressed in above-mentioned second circular hole 10, and remains in the inboard of this second circular hole 10.
So,, the above-mentioned second middle circle tubular blank 8 is sent into the follow-up overlap shown in Fig. 3 (G) removes the operation and the operation that resets through moving above-mentioned sheet metal 1.And after overlap shown in Fig. 3 (G) is removed operation, if carry out the secondary attenuate stretching process shown in above-mentioned Fig. 2 (H), then carry out the operation of removing through this overlap in second circular hole 10 that seal ring 34 that operation obtains is pressed into sheet metal 1 that resets.Relative therewith; Directly send into to be different from and of the present invention sealing circle 34 is implemented the operation of the processing of regulation if will remove seal ring 34 that operation obtain, then can omit the above-mentioned operation that resets (directly taking out the seal ring 34 after separating from sheet metal) at Fig. 3 (G) through above-mentioned overlap.
Under this routine situation that constitutes in the above described manner, except that the effect that obtains by first embodiment, effect, also can obtain and can carry out industrialized mass, and effect, the effect that can use the continuous processing device that needn't increase the operation funds to make.Promptly; Under this routine situation; Owing to use the long-bar metal plate 1 of seeing and be wound in winder from uncoiler off as above-mentioned sheet metal 1; Will be along with the excision operation from 1 excision of this sheet metal and implemented first, second of processing of regulation cylindric in the middle of blank 6,8 be pressed into the inboard of second circular hole 10 of this sheet metal 1 again, therefore, can be with these in the middle of each blank 6,8 send into following manufacturing procedure with this sheet metal 1.That is, compare with continuous processing, equipment investment is cheap, and work efficiency good (process-cycle is short), can process step by step.Therefore, the decline cost of above-mentioned seal ring 34 is further descended.
(the 3rd embodiment's processing method)
Fig. 8 representes the 3rd embodiment's processing method.Under this routine situation; Attenuate stretching process shown in Fig. 8 (F) reaches back in the embedding operation; With second cylindric in the middle of the direction of blank 8 from embedding again after second circular hole 10 of sheet metal 1 is extracted out, turn upside down with respect to the situation of this sheet metal 1 with above-mentioned second embodiment's processing method.Along with this direction is put upside down, the structure of the processing device shown in Fig. 6～7 is changed.And the structure of other part, because the same with second above-mentioned embodiment's processing method, thereby the explanation of omission repetition.
(the 4th embodiment's processing method)
Fig. 9 representes the 4th embodiment's processing method.Under this routine situation, below the plunging manufacturing procedure shown in Fig. 9 (C), be set with the excision operation shown in Fig. 9 (D) and the operation that resets.Because the formation of other part is the same with second above-mentioned embodiment's processing method, thereby omit the explanation of repetition.Importantly, when embodiment of the present invention, if the excision operation after above-mentioned plunging manufacturing procedure, consider operations complexity, guarantee machining accuracy, then can be set in arbitrarily regularly.
As stated, this mode of execution have seal ring drawn cup needle roller bearing 30 through seal ring 34 being carried out moulding with punch process, can make seal ring obtain good dimensional accuracy, and then the wearing and tearing that produce with preventing contacting of component.In addition, owing to have seal ring 34, therefore can control the perforation oil mass.Moreover, because seal ring 34 is floating seal, thereby compares with contact seal and can realize low torque.And more preferably the bearing depth of section through seal ring 34 being made 1.0～0.25mm to realize thin-walled property.
Particularly after through the punch process moulding, do not heat-treat, thereby also can realize low cost owing to seal ring 34.
(the 5th embodiment's processing method)
In the processing method of the seal ring that this is routine, at first, form the sheet metal 1 shown in Figure 10 (A) through being processed into circle from the long-bar metal plate stamping-out that uncoiler is pulled out with stamping press etc.
Then, as first operation, the stamping-out processing through stamping press etc. is carried out stamping-out to the central part of above-mentioned sheet metal 1, make Round Wheel shown in the epimere of Figure 10 (B) first subsequent use in the middle of blank 3.Described discoideus smear metal 51 of the hypomere like Figure 10 (B) that the stamping-out result generates or discarded perhaps conduct are used to make more, and the blank of the seal ring of path uses.
As second operation, to above-mentioned first subsequent use in the middle of blank 3 implement following plunging processing, that is, and will near this first subsequent use in the middle of the part of internal diameter of blank 3 axially be bent into the right angle.This plunging processing is through the mode to be widely known by the people at existing metal manufacture field; Live from the axle direction sandwich with a pair of pressing mold near this first subsequent use in the middle of under the state of part of external diameter of blank 3, make punch die be pressed near this first subsequent use in the middle of the part of internal diameter of blank 3 carry out.Plunging processing through carrying out by this way, make shown in Figure 10 (C) possess from the export-oriented blade of a sword portion 9 of cylindric 4 and this axle direction of cylindric 4 one end radius vector direction outside bending, the cross section become the L font, whole for circular second subsequent use in the middle of blank 5.According to the processing method of seal ring of the present invention, make highi degree of accuracy thin-walled circle by cylindric 4 in this second subsequent use middle blank 5.Relative therewith, in above-mentioned export-oriented blade of a sword portion 9, be present in the part of leaning on the direction outside, footpath than this outer circumferential face of cylindric 4, in the 3rd following operation, make circular smear metal 52 (with reference to the hypomere of Figure 10 (D)), discarded.
Then, in the 3rd follow-up operation, to above-mentioned second subsequent use in the middle of blank 5 implement the stamping-out processing carried out with punch process etc., remove above-mentioned export-oriented blade of a sword portion 9, make the cylindric first middle circle tubular blank 6 shown in the epimere part of Figure 10 (D).The external diameter of this first middle circle tubular blank 6 is consistent with the external diameter of the seal ring 34 that will make.
In the 4th follow-up operation, the first middle circle tubular blank 6 that obtains is like this implemented cold rolling processing.And, through the plastic working of this cold rolling processing, adjust the interior external diameter and the sectional shape of the above-mentioned first middle circle tubular blank 6, make the seal ring with required accuracy to shape and dimensional accuracy 34 shown in Figure 10 (E).Illustrate in greater detail the cold rolling processing that the above-mentioned first middle circle tubular blank 6 is processed into sealing circle 34 with reference to Figure 11～13.
With the above-mentioned first middle circle tubular blank, 6 embedded being supported in the circular punch die 40.This punch die 40 has promptly inside and outside two side faces of each other concentric barrel surface, and the not shown a plurality of support rolls by the outer circumferential face that separately outer circumferential face is rolled be contacted with this punch die 40 come (under the state of the displacement that stops the footpath direction) just to rotate supporting freely.In addition, above-mentioned punch die 40 has the corresponding to internal diameter of external diameter with the seal ring 34 (and above-mentioned first middle circle tubular blank 6) that will make.When above-mentioned the 4th operation, this first middle circle tubular blank 6 is remained in the inner peripheral surface of above-mentioned punch die 40.And, under this state, the above-mentioned first middle circle tubular blank 6 is pushed towards the inner peripheral surface of above-mentioned punch die 40 and along the direction of arrow of Figure 11 through squeezing roll 41.
In the part of the intermediate portion outer circumferential face of above-mentioned squeezing roll 41 and the above-mentioned first middle circle tubular blank, 6 couplings, run through and full week be formed with groove 42.The sectional shape of this groove 42 is a rectangle, and the width dimensions of axial width dimensions and the above-mentioned seal ring that will make 34 is consistent.In addition, the degree of depth of the above-mentioned groove 42 of the footpath direction of above-mentioned squeezing roll 41 is made below the thickness size of the seal ring 34 that will make.When the above-mentioned first middle circle tubular blank 6 being processed into above-mentioned seal ring 34, make 41 rotations on one side of such squeezing roll on one side by the inner peripheral surface that is pressed in above-mentioned punch die 40.And between the inner face of the inner peripheral surface of this punch die 40 and above-mentioned groove 42, brute force is pushed the part of the circumferencial direction of the above-mentioned first middle circle tubular blank 6.
Along with pushing of above-mentioned squeezing roll 41, above-mentioned punch die 40 with the sense of rotation equidirectional of this squeezing roll 41 on rotate, support the extruding force of this squeezing roll 41 simultaneously.In addition, the above-mentioned first middle circle tubular blank 6 is also rotated with this punch die 40.Therefore, in this first middle circle tubular blank 6, make between the inner face of the inner peripheral surface of this punch die 40 and above-mentioned groove 42 to be changed continuously in a circumferential direction by the part of powerful extruding.Consequently, the sectional shape of the above-mentioned first middle circle tubular blank 6 being run through changes with the mode shown in Figure 13 (A) → (B) in full week.That is, the sectional shape plastic deformation of this first middle circle tubular blank 6 is the inner face coupling of the inner peripheral surface and the above-mentioned groove 42 of above-mentioned punch die 40, as above-mentioned seal ring 34.Promptly; During above-mentioned the 4th operation of stating in the use that punch die 40 and above-mentioned squeezing roll 41 carry out; The external diameter of the above-mentioned first middle circle tubular blank 6 and the shape of outer circumferential face are not changed, and the shape of internal diameter and inner peripheral surface is changed, thereby be processed into above-mentioned seal ring 34.
According to the processing method of this routine seal ring that constitutes in the above described manner, it possesses following first～the 4th operation.
" first operation ": the first subsequent use middle blank 3 of making Round Wheel through stamping-out sheet metal 1.
" second operation ": through implement will near this first subsequent use in the middle of the rectangular plunging processing of inner-diameter portion whose bending axially of blank 3, make possess from the export-oriented blade of a sword portion 9 of cylindric 4 and this axle direction of cylindric 4 one end radius vector direction outside bending, the cross section become the L font, whole for annulus second subsequent use in the middle of blank 5.
" the 3rd operation ": remove this second subsequent use in the middle of the export-oriented blade of a sword portion 9 of blank 5, make the first middle circle tubular blank 6 cylindraceous.
" the 4th operation ":, make seal ring 34 with needed accuracy to shape and dimensional accuracy through the interior external diameter and the sectional shape of cold rolling this first middle circle tubular blank 6 of processing adjustment.Self-evident, this accuracy to shape also comprises the precision relevant with global shape such as circularity except that the precision relevant with sectional shape.
Thus, the available low-cost highi degree of accuracy thin-walled circle of making the precision of the size that is necessary fully to guarantee thin-walled and interior external diameter and sectional shape is above-mentioned seal ring 34.Promptly; Under this routine situation; As long as the footpath direction thickness according to the seal ring 34 that will make is selected the thickness as the sheet metal of sheet metal 1; Even thin-walled seal ring 34 also can fully be guaranteed necessary accuracy according to thickness size, the precision of external diameter in other words can fully guaranteeing exactly, also good simultaneously highi degree of accuracy thin-walled circle according to the accuracy to shape manufacturing.Particularly because the punch die 40 that uses above-mentioned that kind and squeezing roll 41 carry out cold rolling processing that the above-mentioned first middle circle tubular blank 6 is processed into above-mentioned seal ring 34, thereby can make seal ring 34 expeditiously with good accuracy to shape and dimensional accuracy.
In addition, when the 4th operation, the first middle circle tubular blank 6 is remained in the inner peripheral surface of circular punch die 40.And, under this state, through the inner peripheral surface of squeezing roll 41 towards this first middle circle tubular blank 6 of inner peripheral surface extruding of this punch die 40.Preferably, the first middle circle tubular blank 6 of the corresponding to external diameter of external diameter of the seal ring 34 after the formation of the 3rd operation has and accomplishes.Then, in the 4th operation, the external diameter of this first middle circle tubular blank 6 is not changed, but the shape of internal diameter and inner peripheral surface is changed.Thus, can make seal ring 34 expeditiously with good accuracy to shape and dimensional accuracy.
(the 6th embodiment's processing method)
Figure 14～16 expressions the 6th embodiment's processing method.Four bights (axle direction two ora terminalis of inside and outside two side faces) of the sectional shape of the seal ring 34 that the 5th above-mentioned embodiment situation is obtained fine away (making the radius of curvature of the sectional shape of this part become minimum).Relative therewith, under this routine situation, deliberately convex arc surface (forming angle R) is made in four bights of sectional shape.Angle R about axle direction two ora terminalis of inner circumference edge; In the 5th above-mentioned embodiment's processing method, just can form as long as angle R (as long as the sectional shape in bight, bottom surface is made concaved circular cambered surface) is set in the bight, bottom surface of the groove 42 of the outer circumferential face that is formed at squeezing roll 41.Relative therewith, if only make the angle R of axle direction two ora terminalis of outer circumferential face, then needn't take out the seal ring after accomplishing from the inner peripheral surface of this punch die according to the shape of the inner peripheral surface of punch die.
This routine processing method is to consider in view of such incident, and its purpose is to realize to take out from punch die 40a and not only makes axle direction two ora terminalis of inner peripheral surface but also make axle direction two ora terminalis of outer circumferential face also form the processing method of the seal ring 34 of angle R.In addition, on Figure 14 of this routine production method of expression, (A)～(C) identical with the Figure 10 (A)～(C) that representes the 5th above-mentioned embodiment's processing method.In addition, Figure 14 (E) is formed with following angle R portion 11 this point identical with above-mentioned Figure 10 (D) except that the part.This example is characterised in that, is provided with the preprocessing operation shown in Figure 14 (D), meanwhile, has designed the inner peripheral surface shape of the employed punch die 40a of cold rolling processing that carries out at (F).Therefore, relevant repeat specification has been carried out omitting or is simple to the part identical with the 5th above-mentioned embodiment's processing method, below, stress and the 5th embodiment's processing method different portions.
Under the situation of the 6th embodiment's processing method of considering according to above-mentioned intention, outer circumferential face one ora terminalis at the first middle circle tubular blank 6 shown in the epimere of Figure 14 (E) is formed with angle R portion 11 shown in figure 15.As long as the operation that forms this angle R portion 11 was at the inner peripheral surface that the above-mentioned first middle circle tubular blank 6a is fixed in (being embedded in circular punch die 40a) punch die 40a shown in figure 16 in the past.That is, between between Figure 14 (B) → (C), between Figure 14 (C) → (E), between Figure 14 (E) → (F) any one, carrying out can.Under this routine situation, will be shown in (C) second before blank 5 is processed into the first middle circle tubular blank 6 shown in (E) in the middle of subsequent use, at Figure 14 (D), cylindric 4 outer circumferential face front-end edge portion is formed as above-mentioned angle R portion 11 shown in Figure 15.Form the operation of such angle R portion 11; Be through outside with above-mentioned cylindric 4, being embedded under the state of core cylindraceous;, make this outer circumferential face front-end edge portion that plastic deformation take place and carry out at the circular pressure die that is formed with the planar compressive plane of concave circular arc full week at this outer circumferential face front-end edge portion of cylindric 4 extruding front-end face.
In the preprocessing operation of carrying out like this; To be formed with at above-mentioned cylindric 4 outer circumferential face front end above-mentioned angle R portion 11 shown in Figure 14 (D) the 3rd subsequent use in the middle of blank 5A, likewise implement the stamping-out processing of punch process etc. with above-mentioned the 5th embodiment's situation.Then, remove export-oriented blade of a sword portion 9, make the first middle circle tubular blank 6 the sort of cylindraceous shown in the epimere part of Figure 14 (E).At axle direction one ora terminalis of the inside and outside side face of axle direction two end edge portions of inside and outside two side faces of this first middle circle tubular blank 6, be provided with above-mentioned angle R portion.Relative therewith, it is sharp that axle direction two ora terminalis of another ora terminalis of the axle direction of outer circumferential face and inner peripheral surface remain.Therefore, in the 4th operation shown in Figure 14 (E) → (F), when the interior external diameter of adjusting the above-mentioned first middle circle tubular blank 6 and sectional shape, make angle R portion be formed at another ora terminalis of axle direction of above-mentioned outer circumferential face and axle direction two ora terminalis of inner peripheral surface.Then, all form angle R portion, and make above-mentioned seal ring 34 with needed accuracy to shape and dimensional accuracy in four angle parts of sectional shape.
In order to obtain such seal ring 34, shown in figure 16, the inner peripheral surface of the employed circular punch die 40a of above-mentioned the 4th operation made to make concentrically with respect to one another cylindrical part be large-diameter portion 43 and the continuous band step barrel surface of minor diameter part 44 through stepped part 45.In addition, this stepped part 45 is made the concaved circular cambered surface that sectional shape is the quadrant arcuation.In addition, about bottom axle direction two vertex angle parts of the groove 42a of the outer circumferential face that is formed at squeezing roll 41a, also make the concaved circular cambered surface that sectional shape is the quadrant arcuation.The structure of other part relevant with cold rolling processing device and above-mentioned the 5th embodiment's processing method are the same.
In this routine situation; Another ora terminalis of axle direction (edge of sharpening) at the outer circumferential face of this first middle circle tubular blank 6 is under the stepped part 45 opposed states with the above-mentioned concaved circular cambered surface that is arranged at the inner peripheral surface of this punch die 40a, and the above-mentioned first middle circle tubular blank 6 is embedded in above-mentioned punch die 40a.And, the same with above-mentioned the 5th embodiment, push the above-mentioned first middle circle tubular blank 6 through above-mentioned squeezing roll 41a towards the inner peripheral surface of above-mentioned punch die 40a.The result of this extruding is that the sectional shape of this first middle circle tubular blank 6 is changed with the mode shown in Figure 16 (A) → (B) at complete cycle.That is, make of the inner peripheral surface matching mode generation plastic deformation of the sectional shape of this first middle circle tubular blank 6, and then make above-mentioned seal ring 34 with inner peripheral surface and the above-mentioned groove 42 of above-mentioned punch die 40a.At this moment; With the shape transferred thereon of the concaved circular cambered surface of bottom axle direction two vertex angle parts that constitute this groove 42 inner peripheral surface two end edge portions, with the shape transferred thereon of above-mentioned stepped part 45 another end edge portion of axle direction to the outer circumferential face of this first middle circle tubular blank 6 to the above-mentioned first middle circle tubular blank 6.Owing to be formed with original above-mentioned angle R portion 11 at axle direction one end edge portion of the outer circumferential face of this first middle circle tubular blank 6; Thereby in the result of above-mentioned the 4th operation and axle direction two end edge portions of inside and outside two side faces of the above-mentioned seal ring 34 that obtains, being formed with sectional shape respectively is the angle R portion of quadrant arcuation.
Processing method according to above-mentioned such this routine seal ring that constitutes can be formed with the colory seal ring 34 that sectional shape is the angle R portion (dome arc) of quadrant arcuation through the axle direction two ora terminalis portions of two side faces inside and outside the manufacturing of industrial gimmick high efficiency respectively.That is, as long as form angle R portion at axle direction two end edge portions of inside and outside two side faces simply, just can through to the seal ring 34 enforcement turning of using the 5th above-mentioned embodiment's processing method manufacturing, grind and machining such as cut and make.But, this method through such machining formation angle R portion, processing cost is high, has improved the seal ring that obtains inevitably even the cost of the automobile of sealing circle with various mechanical devices such as speed changers is installed.Relative therewith; According to this routine processing method; After above-mentioned first operation, before above-mentioned the 4th operation, that is, between this first operation and above-mentioned second operation, between this second operation and above-mentioned the 3rd operation, or any two-step in the middle of between the 3rd operation and above-mentioned the 4th operation between; Enforcement is made the for example moulding in advance of the dome arc of quadrant arcuation with the sectional shape of at least one side's in outer circumferential face two ora terminalis ora terminalis to middle blank (any in first subsequent use middle blank 3～the first middle circle tubular blanks 6); Therefore, this ora terminalis is not a cusped edge, but and then the good seal ring 34 of high efficiency quality bills of materials.
(the 7th routine processing method)
The 7th routine processing method of Wear-resistant Treatment is implemented in explanation to seal ring below.Avoid the distortion of following with heat treatment phases such as quenching, tempering in order to make seal ring 34 after the processing method processing through first embodiment～the 6th embodiment; And after drawing, do not implement processing such as heat treatment; The work-hardening that expectation is carried out through the processing to sheet metal (is carried out work-hardening through punch process in first～the 4th embodiment's processing method; In the 5th, the 6th embodiment's processing method, except that punch process, also carry out work-hardening) through cold rolling processing.Even because as work-hardening, seal ring 34 constitutes floating seal, thereby when using usually, can not throw into question.But,, preferably seal ring 34 is carried out Wear-resistant Treatment using under the situation of drawn cup needle roller bearing 30 under the harsh condition.
As Wear-resistant Treatment, for thin-walled seal ring 34 is refined into needed accuracy to shape and dimensional accuracy, and preferably do not produce the processing method of the distortion that causes because of Wear-resistant Treatment.Particularly, can consider the nitriding processing method of processing that can be at low temperatures exactly.In nitriding is handled, gasification nitriding, salt bath nitriding, ion nitriding etc. are for example arranged, and the Nv nitridation process that preferably can handle at low temperatures (trade mark of Air Water Co., Ltd.).
In the Nv nitridation process; Any processing method to through first～the 6th embodiment is shaped to cylindrical shape seal ring 34; Be after gas is implemented fluoridation at first for example, carry out the gas nitriding processing and form nitriding layer on the surface of seal ring 34 at fluorine such as using NF3.Through this fluoridation, remove the Cr oxide on the processed material surface that hinders nitriding etc., and then form the fluorinated layer that makes the processed material surface active.Thus, handle, also can form nitriding layer relatively uniformly even under the low temperature about 400 ℃, carry out nitriding.As stated; Because fluoridation and nitriding are handled and are all handled at low temperatures; Thereby seal ring 34 is deformed, high dimensional accuracy and shape can be kept, and then high-precision seal ring 34 can be made by first～the 6th embodiment's processing method processing.As stated, handle through seal ring 34 is implemented the Nv nitridings, form the nitriding layer of surperficial Hv hardness more than 400, thickness 5～20 μ m, the distortion of the seal ring 34 that both can prevent to accompany with Wear-resistant Treatment can improve wear resistance again.
In addition, the invention is not restricted to each above-mentioned mode of execution, but can suitably be out of shape, improvement etc.
This mode of execution uses inner peripheral surface to have the outer ring shell 31 that roller surface 31a, two end part have the 31b of inward flange portion, 31c; But also can use outer circumferential face to have the inner ring shell that roller surface, two end part have export-oriented blade of a sword portion; Under this situation; Seal ring is in the outside of shell, and is arranged between the end face and export-oriented blade of a sword portion of retainer.
Embodiment
Below, use have seal ring drawn cup needle roller bearing and existing glide bearing (bearing shell) of the present invention, dynamic torque and perforation oil mass are compared test.The comparative trial of dynamic torque, two bearings all use the bearing depth of section to carry out as 500N as 1.5mm, test load.In addition; The comparative trial that connects oil mass is carried out under following condition; Promptly; All being that the bearing cross section is high is 1.5mm, and using the gap of seal ring and axle to reach that drawn cup needle roller bearing that the upper limit is 0.06mm and gap reach bearing shell that the upper limit is 0.08mm, the axle revolution is made as 0～3000rpm, lubricant oil is 30kPa, oily warm about 80 ℃ as JWS309 (Exxon Mobil manufactured), oil pressure.Figure 17 representes the measurement result of dynamic torque, and Figure 18 representes to connect the measurement result of oil mass.
Shown in figure 17, can find out, in the comparative trial of dynamic torque, owing to use drawn cup needle roller bearing thereby can realize low torqueization.Can confirm that particularly in the low velocity zone that combustion takes effective rate variance, the low effect of torque drop is obvious.
In addition; Shown in figure 18, in connecting the comparative trial of oil mass, be that the perforation oil mass of 0.08 bearing shell is compared with the gap; It is high that the gap is that the perforation oil mass maximum of the drawn cup needle roller bearing of 0.06mm also only reaches about 4mL, can with the same degree of bearing shell on connect the adjusting of oil mass.
Then, to can at high temperature using and use the material of in polyamide easy to manufacture 46, sneaking into 25% glass fibre, changing condition of molding and the external diameter circularity of simultaneously resin-made cage of internal diameter 45mm being carried out injection-molded moulding, each condition of molding and having or not annealing in process to cause contrasts.Figure 19 representes its result.
In addition, test conditions is that 4 type the resin-made cages different to condition carry out moulding, wherein, one type formed article are carried out annealing in process.Annealing in process is the annealing axle of 45mm, 22mm to be inserted the internal diameter of resin-made cage, keeps 3 hours down at 170 ℃.Circularity is to use the engineering microscope, and the external diameter that waters oral-lateral and sparger side of resin-made cage (not carrying out each 10 of the retainers of annealing in process, 20 of retainers with annealing in process) is measured 8 points respectively, obtains mean value.
Shown in figure 19, can find out, do not carry out the resin-made cage of annealing in process, because of there is a little difference in condition of molding, but all out-of-size (± 0.1mm).On the other hand, carried out the resin-made cage of annealing in process and all included in the tolerance, shown that annealing in process is being effective aspect the raising circularity.
Then, the buckling deformation after 3 kinds of Wear-resistant Treatment of having carried out tufftridy (salt bath nitriding), NV nitriding, NV nitriding (No oxided film) is tested.Figure 20 representes the amount of warpage through these processing.This result shows, no matter carried out the situation of any processing among NV nitriding, NV nitriding (No oxided film), the A Erka Alcoa VG7, the amount of warpage of all finished products all in regulating scope, so more preferably it.
Japanese patent application that present patent application was published with on June 8th, 2006 (spy is willing to 2006-159699) and the Japanese patent application of publishing on January 19th, 2007 (the special 2007-010153 of hope) are foundation, and its content is quoted as reference at this.
Claims (5)
1. a manufacturing has the method for the drawn cup needle roller bearing of seal ring, and this drawn cup needle roller bearing comprises:
Shell, it has roller surface on inner peripheral surface or outer circumferential face, and in two end part, has lip part;
Retainer, it has a plurality of oily pockets in a circumferential direction;
A plurality of needle rollers, it remains in said each oily pocket, so that these a plurality of needle rollers can roll along said roller surface freely;
The cylindrical shape seal ring, it is set in the inboard of said shell or the outside between the lip part of end face and said shell of said retainer, wherein,
Said seal ring constitutes floating seal, and the height of the cross section of this needle bearing is 1.0 to 3.5mm,
Said method is characterised in that, makes the step of said seal ring moulding through punch process, and this step comprises:
The punching operation is implemented piercing to the sheet metal of being processed by Mild Sheet Steel or corrosion resistant plate, to obtain having the first subsequent use middle blank of first circular hole;
The plunging operation in this operation, meets at right angles entirely being bent in week with respect to above-mentioned sheet metal around said first circular hole, with obtain having cylindric second subsequent use in the middle of blank;
The size Control operation; In this operation; Using mould to limit above-mentioned cylindric outer circumferential face and do not limiting under the state of this inner peripheral surface of cylindric; Extrusion cylinder shape portion in the axial direction, with said cylindric external diameter and axle direction size Control at specified value and inwardly expanded in the overlap footpath, thereby obtain the first middle circle tubular blank;
The attenuate stretching process; In this operation; To have the axial one distolateral internal side diameter that be pressed into this first middle circle tubular blank of the tube reducing drift of the outside dimension consistent from the said first middle cylinder blank with the internal diameter size of the seal ring that will obtain; The mode that enlarges with the external diameter that does not make the said first middle circle tubular blank simultaneously limits the outer circumferential face of this first middle circle tubular blank; Converge in the axle direction of this first middle circle tubular blank another is distolateral so that be present in the overlap of the interior circumferential portion of the said first middle circle tubular blank; Thereby obtain the second middle circle tubular blank, the inner peripheral surface of this second middle circle tubular blank in said axle direction the other end has the overlap blade of a sword portion of inward flange shape;
Overlap is removed operation, in this operation, will have the inboard that the blanking punch of the outside dimension consistent with the internal diameter size of the seal ring that will obtain inserts the said second middle circle tubular blank, removing said overlap blade of a sword portion, thereby obtains said seal ring; And
After said plunging operation, carry out cutting off the cut-out operation of said cylindric portion, the first middle cylinder blank, the second middle cylinder blank or said seal ring from said sheet metal.
2. method according to claim 1,
Wherein, said sheet metal is the strip sheet metal of pulling out from uncoiler, and is not to run through the sheet metal that whole width cuts off above-mentioned strip, but along with the carrying out of the operations of seal ring comes order to see the sheet metal of above-mentioned strip off,
Wherein, The cut-out operation of the said cylindric portion of said cut-out, the first middle cylinder blank or the second middle cylinder blank comprises: form than the second big circular hole of said first circular hole in the said sheet metal; And from the said cylindric portion of the inboard stamping-out of this second circular hole, the said first middle circle tubular blank or the said second middle circle tubular blank, and
Wherein, After the processing of implementing regulation; Will be in above-mentioned cut-out operation cylindric portion, the first middle circle tubular blank or the second middle circle tubular blank behind the inboard stamping-out of said second circular hole go back to the inboard that is embedded into said second circular hole, and be admitted to the processing device of execution operation subsequently along with the conveying of said sheet metal.
3. the method for claim 1 is characterized in that, after the said punch process of accomplishing said seal ring, the sealing circle is not heat-treated.
4. the method for claim 1 is characterized in that, after the said punch process of accomplishing said seal ring, the sealing circle is carried out Wear-resistant Treatment.
5. the method for claim 1 is characterized in that, said retainer is formed from a resin.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP159699/2006 | 2006-06-08 | ||
| JP2006159699 | 2006-06-08 | ||
| JP010153/2007 | 2007-01-19 | ||
| JP2007010153A JP5012038B2 (en) | 2007-01-19 | 2007-01-19 | Metal ring manufacturing method |
| PCT/JP2007/061550 WO2007142298A1 (en) | 2006-06-08 | 2007-06-07 | Shell needle bearing with seal ring and its manufacturing method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110454305.6A Division CN102537051B (en) | 2006-06-08 | 2007-06-07 | Drawn cup needle roller bearing having a seal ring and its manufacture method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101466957A CN101466957A (en) | 2009-06-24 |
| CN101466957B true CN101466957B (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007800211585A Active CN101466957B (en) | 2006-06-08 | 2007-06-07 | Shell needle bearing with seal ring and its manufacturing method |
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| JP (1) | JP5408226B2 (en) |
| CN (1) | CN101466957B (en) |
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| CN102562817A (en) * | 2012-02-28 | 2012-07-11 | 洛阳轴研科技股份有限公司 | Method for designing combined sealing device used in low speed and heavy load conditions of bearing |
| JP2014152909A (en) * | 2013-02-13 | 2014-08-25 | Chuo Spring Co Ltd | Annular member |
| CN105750830A (en) * | 2014-12-16 | 2016-07-13 | 上海运申制版模具有限公司 | Machining method of intaglio roller plug |
| JP6537940B2 (en) | 2015-09-08 | 2019-07-03 | Ntn株式会社 | Bearing ring manufacturing method |
| CN106964692B (en) * | 2017-04-20 | 2019-04-12 | 海宁汇豪太阳能科技有限公司 | A kind of processing technology and its processing unit (plant) of pressure-bearing inner liner |
| CN114287374A (en) * | 2022-01-13 | 2022-04-08 | 中国水产科学研究院渔业机械仪器研究所 | Self-elevating type cage culture platform and method |
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| JPH0623776Y2 (en) * | 1987-11-27 | 1994-06-22 | 日本精工株式会社 | Floating seal for roller bearing |
| JP3458242B2 (en) * | 1993-10-04 | 2003-10-20 | 高周波熱錬株式会社 | Method of manufacturing seal ring for floating seal |
| JP2002139067A (en) * | 2000-11-06 | 2002-05-17 | Nsk Ltd | Manufacturing method for shell type needle roller bearing |
| JP2003230927A (en) * | 2002-02-14 | 2003-08-19 | Sanyo Special Steel Co Ltd | Rough shape material for bearing ring reduced in quenching strain and its manufacturing method |
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- 2007-06-07 CN CN2007800211585A patent/CN101466957B/en active Active
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| Publication number | Publication date |
|---|---|
| JP2012081520A (en) | 2012-04-26 |
| JP5408226B2 (en) | 2014-02-05 |
| CN101466957A (en) | 2009-06-24 |
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