CN100529113C - Long life rotating body with excellent fatigue strength and method of manufacturing the rotating body - Google Patents
Long life rotating body with excellent fatigue strength and method of manufacturing the rotating body Download PDFInfo
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- CN100529113C CN100529113C CNB2003801035046A CN200380103504A CN100529113C CN 100529113 C CN100529113 C CN 100529113C CN B2003801035046 A CNB2003801035046 A CN B2003801035046A CN 200380103504 A CN200380103504 A CN 200380103504A CN 100529113 C CN100529113 C CN 100529113C
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- 238000004519 manufacturing process Methods 0.000 title abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 40
- 239000002184 metal Substances 0.000 claims abstract description 40
- 238000003466 welding Methods 0.000 claims abstract description 11
- 238000004080 punching Methods 0.000 claims description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 230000002784 sclerotic effect Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 abstract description 7
- 238000002635 electroconvulsive therapy Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 29
- 230000014509 gene expression Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000005480 shot peening Methods 0.000 description 6
- 230000003116 impacting effect Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009747 press moulding Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
- B60B3/002—Disc wheels, i.e. wheels with load-supporting disc body characterised by the shape of the disc
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
- B60B3/04—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B3/00—Disc wheels, i.e. wheels with load-supporting disc body
- B60B3/04—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding
- B60B3/041—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding characterised by the attachment of rim to wheel disc
- B60B3/044—Disc wheels, i.e. wheels with load-supporting disc body with a single disc body not integral with rim, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding characterised by the attachment of rim to wheel disc characterised by cross-sectional details of the attachment, e.g. the profile
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
A long life rotating body with an excellent fatigue strength and a method of manufacturing the rotating body, the rotating body formed by welding the end parts of stacked two sheets of sheet metal to each other comprising lap fillet welded joints, cold bending worked parts, and punched holes, characterized in that an ultrasonic shock treatment is applied to either of the welded joints, cold bending worked parts, and punched holes to form dents or smoothen the surfaces thereof so as to relieve a residual tensile stress, whereby the long life rotating body with the excellent fatigue strength formed of the sheet metal having the lap fillet welded joints, cold bending worked parts, and punched holes which is subjected to repeated loads by rotation such as road wheels for car, pulleys, gears, and crawler driving wheels can be provided.
Description
Technical field
The present invention relates to a kind of long lifetime rotator and manufacture method thereof of having used the fatigue strength excellence of metal sheet.For example, relate to automotive wheel, belt pulley, gear, crawler belt driving wheel etc. have long lifetime rotator and the manufacture method thereof that lap fillet weld joint, the clod wash of bearing repeated load because of rotation add the Ministry of worker, the isostructural a kind of fatigue strength excellence of punching hole.
Background technology
Bear the rotator such as automotive wheel, belt pulley, gear, crawler belt driving wheel of repeated load because of rotation, have the lap fillet weld joint, clod wash adds the weakness on the metal fatigue aspects such as the Ministry of worker, punching hole.
As the method for improving bead shape, fatigue strength by the aftertreatment after the processing such as these welding, clod wash processing, punching press, the method that is adopted was in the past: 1. grinding, 2. TIG finishing, 3. shot-peening method (shot peening), 4. hammering method (hammer peening).These methods are that the shape of the welding edge end that becomes stress concentration portion is repaired with the mitigation stress concentration, or change unrelieved stress to improve the method for fatigue strength.But these methods exist following problem.
At this, grinding, TIG finishing are to be shaped to the less shape of stress concentration by the shape with stress concentration portion, thus the method that fatigue strength is improved.But, though this is effective for the fatigue strength that improves lap fillet weld joint and punching hole, then do not have an effect for clod wash processing, it is very low to add its production efficiency, can not be towards mass-produced use.And then, in grinding, also have under the direction and the rectangular situation of stress direction of contact roll flute, can produce on the contrary sometimes and make processing trace that fatigue cracking is easier to expand etc., requirement has than aspect the hi-tech on handling.
, generally can be at weld part because the localized heat that is caused by weld heat input expands and the thermal contraction that caused by subsequently cooling and import unrelieved stress.In addition, also there is the bigger unrelieved stress of following viscous deformation and producing in cold working portion.Such unrelieved stress becomes a major reason that makes decrease of fatigue strength.
At this,, thereby can take to introduce compressive residual stress or reduce the measure that the stretching unrelieved stress improves fatigue strength as other schemes that improve fatigue strength.Known have methods such as shot peening and hammering processing.Shot peening is that the steel ball a little less than a large amount of 1mm is impacted at the position that becomes the starting point that fatigue cracking takes place to give the method for compressive residual stress.Hammering method is a method of utilizing driving tup bump handling parts such as pressurized air.
But the shot-peening method need be used huge mechanism, also requires to have big chamber in addition in use, and is therefore still not high for its efficient of use on producing in enormous quantities, and needs multiple auxiliary facility.In addition, it is obviously very poor only such position selectivity to be handled at necessary position, therefore can not be applied to pursue the occasion of outward appearance.
In addition,, but also can cause excessive viscous deformation, therefore exist the shortcoming that is difficult to be applicable to thin plate because the hammering method reactive force is very big.
Have again, in hammering method, because of connecting portion being imposed the mechanical workout of several hertz low frequency, so finished surface is clearly concavo-convex, its recess will become stress concentration portion, become the starting point of fatigue cracking, so its result instability exists the problem that the fatigue strength of connection section integral body sometimes descends on the contrary.
And then, known shape or the minimizing stretching unrelieved stress of the heating remelting of welding metal being improved the welding edge end of can utilizing in addition.But also there is the extremely low problem of efficient in this method, and effect does not have so desirable yet.
As mentioned above, for being for the rotator of representative with the automotive wheel, the technology of very difficult employing raising fatigue strength in the past, even and adopt, the raising degree of its fatigue strength also only stay in low-level on.Therefore, though further met the high strength of material, the intensity of working as steel reaches 600N/mm
2Level or its are when above, and the punching hole end face will sharply raise to the susceptibility of fatigue, thereby the problem that comes to a dead end with regard to the effect that tired raising occurred resisting.
In addition, as with by welded-joint being applied the relevant conventional art of method that ultrasonic vibration improves fatigue strength, for example, at United States Patent (USP) the 6th, disclose in 171, No. 415 the specification sheets along heated welding seam part applies the method for ultrasonic vibration by welding arc.
But the conventional art is to be prerequisite the pyritous material after just welding applied ultrasonic vibration, and concrete object that does not just impact with ultrasonic vibrator as proposed by the present invention and process range discloses in addition.
Summary of the invention
The objective of the invention is to solve the problem that exists in the above-mentioned technology before, provide a kind of as automotive wheel, belt pulley, gear, crawler belt driving wheel etc. have lap fillet weld joint, the clod wash of bearing repeated load because of rotation add the Ministry of worker, punching hole utilization the long lifetime rotator of fatigue strength excellence of metal sheet.
The present invention is in the result who deeply discusses in order to solve above-mentioned problem, be to apply ultrasonic vibration by the surface that lap fillet weld joint, the clod wash of bearing repeated load because of rotation as automotive wheel, belt pulley, gear, crawler belt driving wheel etc. is added the Ministry of worker, punching hole to handle, thereby a kind of invention of long lifetime rotator of fatigue strength excellence is provided, and the part that becomes its main points is the following content as defined in the claim scope.
(1) a kind of long lifetime rotator of fatigue strength excellence, it is the rotator that has two overlapping lap fillet weld joints that then end are welded of metal sheet, it is characterized in that, around the end, limit of this lap fillet weld joint, have the impression of handling the wide 1～5mm forms by ultrasonic impact, the limit end radius of having implemented the end, limit of this ultrasonic impact processing is 1mm or more than it.
At this, so-called ultrasonic impact is handled and is meant the processing that metal sheet surface is impacted by the ultrasonic vibration terminal.
(2) a kind of long lifetime rotator of fatigue strength excellence, it is the rotator with lap fillet weld joint overlapping and that the end is welded with two metal sheets, it is characterized in that, on the metal sheet surface or table back of the body two sides of the root of weld of this lap fillet weld joint, has the impression of handling the wide 1～5mm that forms by ultrasonic impact.
(3) a kind of long lifetime rotator of fatigue strength excellence, it is the rotator that clod wash with metal sheet adds the Ministry of worker, it is characterized in that, implementing ultrasonic impact by the tensile side surface that this clod wash is added the Ministry of worker handles, the surface hardness on this tensile side surface is compared with non-handling part increases by 10% or more than it, the stretching unrelieved stress that this clod wash adds the Ministry of worker be tensile strength 50% or it is with the scope down to compression.
(4) a kind of long lifetime rotator of fatigue strength excellence, it is the rotator that clod wash with metal sheet adds the Ministry of worker, it is characterized in that, implementing ultrasonic impact by the compression-side surface that this clod wash is added the Ministry of worker handles, this compression-side surface according to smoothedization of center line average roughness Ra to 10 μ m or below it, the surface hardness on this tensile side surface is compared with non-handling part increases by 10% or more than it, the stretching unrelieved stress that this clod wash adds the Ministry of worker be tensile strength 50% or it is with the scope down to compression.
(5) a kind of long lifetime rotator of fatigue strength excellence, it is the rotator with metal sheet of punching hole, it is characterized in that, by being implemented ultrasonic impact, handles the end face of this punching hole, the breach on the surface of the end face of this punching hole according to smoothedization of center line average roughness Ra to 10 μ m or below it, not having hardness on this punching hole end face is the above sclerotic tissue of 400Hv or its, and the trickle be full of cracks below the 200 μ m that produce from the surface of this punching hole end face is by 50% or the degree of depth it below of flattening to former length.
(6) the long lifetime rotator of any described fatigue strength excellence in above-mentioned (1) to (5) is characterized in that, above-mentioned metal sheet is that tensile strength is at 400N/mm
2Or its above steel.
(7) a kind of manufacture method of long lifetime rotator of fatigue strength excellence, it be have lap fillet weld joint, clod wash add the Ministry of worker and/manufacture method of the metal sheet system rotator of punch process portion, it is characterized in that, utilize that clod wash with the end, limit of welding line joint, the root of weld, metal sheet adds that the shape of processed portions such as the Ministry of worker, punch process portion is corresponding, the termination of pin is the ultrasonic vibration terminal of convex or concavity, implement ultrasonic impact and handle.
Description of drawings
Fig. 1 is the side elevational view of the automotive wheel of an embodiment of the invention.
Fig. 2 is an A-A sectional view among Fig. 1.
The figure that Fig. 3 describes for the enlarged view with the lap fillet weld connector portions of representing two metal sheets.
Fig. 4 adds the figure of the situation that the ultrasonic impact of the Ministry of worker handles to the clod wash of metal sheet for explanation.
Fig. 5 is for illustrating the figure of the situation that the ultrasonic impact of the punching hole portion of metal sheet is handled with partial enlarged drawing.
Fig. 6 is the figure with the situation of stereographic map explanatory view 5.
Embodiment
With the automotive wheel is example, utilizes Fig. 1～Fig. 6 that the specific embodiment of the present invention is elaborated.
Fig. 1 is the side elevational view of the automotive wheel of embodiment of the present invention.Automotive wheel among Fig. 1, be to make by the vehicle wheel diskware is welded mutually with the wheel rim spare of roll forming, wherein this vehicle wheel diskware is by the press forming processing that comprises punch process steel plate or aluminium sheet to be processed, and 1 expression punching hole wherein.Below, so-called metal sheet is meant and comprises steel plate and aluminium alloy plate at interior metal sheet material.
Fig. 2 is the sectional view of the automotive wheel of an embodiment of the invention, the A-A section in the presentation graphs 1.In Fig. 2, the 1st, by the punching hole of suppressing die-cut metal sheet to form, the 2nd, so-called hat (convex) portion that forms metal sheet being carried out cold-press moulding processing, because of wherein comprising the bending machining composition, thus can think with the present invention in clod wash to add the Ministry of worker suitable.3 expressions are overlapping and weld the lap fillet weld connector portions that its end forms with two metal sheets.
Because the repeated load in the running car, add the easy stress concentration that takes place on the Ministry of worker and the punching hole in these weld parts, clod wash, the fatigue strength at these positions is just minimum, thereby handles by these positions being carried out ultrasonic impact, can significantly improve fatigue strength.
4 expression ultrasonic vibration terminals in Fig. 2.The generating unit of employed ultrasonic vibration among the present invention, produce vibration by the vibration generator, be converted to the mechanical vibration of 19KHz～60KHz by transmodulator (ト ラ Application ス デ ユ one ザ), with waveguide its amplitude is carried out amplification again, thereby the ultrasonic vibration terminal that the pin by φ 2mm～6mm is constituted is with the amplitude vibration of 20～40 μ m.The good degree of depth of smoothness that can form the surface of the portion of impacting thus is the impression of hundreds of μ m.This ultrasonic vibration generating unit also can be equally applicable in following each embodiment.
Fig. 3 is the figure of the lap fillet weld connector portions of two metal sheets of expression, the i.e. detailed diagrammatic sketch of 3 among Fig. 2.In Fig. 3,6,7 is two metal sheets, 9 expression ends, limit, the 10 expression roots of weld.Radius-of-curvature ρ in end, limit 9 represents limit end radius, and its angle θ represents end angle, limit.Rotator among the present invention (for example automotive wheel), around the end, limit 9 of its lap fillet weld joint, the impression of handling the wide 1～5mm forms by ultrasonic impact is arranged, and the limit end radius ρ that has implemented the end, limit of ultrasonic impact processing is 1mm or more than it.
By by impacting the impression that forms wide 1～5mm around the above-mentioned ultrasonic vibration terminal opposite side end 9, make the limit end radius ρ of end, limit become 1mm or more than it, thereby, because can be in the stress concentration that relaxes end, limit 9, the stretching unrelieved stress is changed over compressive residual stress, therefore can significantly improve the fatigue strength of rotator.
Rotator among the present invention (for example automotive wheel), metal sheet surface or table back of the body two sides at the root of weld 10 of its lap fillet weld joint have the impression of handling the wide 1～5mm that forms by ultrasonic impact.
Impact the impression that forms wide 1～5mm by metallic surface or table back of the body two sides, can relax the stress concentration of the root of weld 10, so can significantly improve the fatigue strength of rotator by above-mentioned ultrasonic vibration terminal butt welded seam root 10.
Fig. 4 represents is that the clod wash of metal sheet adds the Ministry of worker, is the detailed diagrammatic sketch of amplification of 2 among Fig. 2.In Fig. 4,4,4 ' expression ultrasonic vibration terminal used in the present invention, the table back of the body two sides that adds the Ministry of worker (for example hat portion of wheel) by the clod wash from rotator applies ultrasonic vibration, the tensile side surface that clod wash adds the Ministry of worker is that convex surface and compression-side surface are that the surface hardness of concave surface improves 10% or more than it than non-handling part, clod wash adds the stretching unrelieved stress of the Ministry of worker, will become tensile strength 50% or its with down to the compression scope.
Consequently can significantly improve the fatigue strength that clod wash adds the Ministry of worker.
In addition, by only the concave surface that adds the compression-side surface of the Ministry of worker as clod wash being impacted, compression-side surface by smoothedization of center line average roughness Ra to 10 μ m or below it, simultaneously the unrelieved stress of tensile side by relax to tensile strength 50% or below it, can not stay the processing vestige in the visual face side that can see in use in addition, therefore, can keep improving fatigue strength under the situation of aesthetic property.
Have again, the termination of the ultrasonic vibration terminal of the concave surface by will impacting metal sheet surface is made as convex, and the termination of ultrasonic vibration terminal that will impact the convex surface of metal sheet surface is made as and has than the convex surface of the metal sheet surface matrix of larger radius of curvature (but in Fig. 2 and Fig. 4 the termination radius-of-curvature of ultrasonic oscillator 4 ' exaggerated showed) more, thereby the termination of ultrasonic vibration terminal is easy to match with metal sheet surface, therefore can further improve surface hardness and reduces unrelieved stress.
Fig. 5 and Fig. 6 are the figure of expression to the situation of the punching hole portion execution ultrasonic impact processing of metal sheet, and Fig. 5 is the partial enlarged drawing of Fig. 2, and Fig. 6 is its stereographic map.In Fig. 5, the employed in the present invention ultrasonic vibration terminal of 4 ' expression, apply ultrasonic vibration by end face to the punching hole portion 5 (for example punching hole portion of wheel) of rotator, the breach on the surface of punching hole end face according to smoothedization of center line average roughness Ra to 10 μ m or below it, not having hardness on this punching hole end face is 400Hv or the sclerotic tissue more than it, from the 200 μ m that the surface produced of this punching hole end face or the trickle be full of cracks below it, by 50% or the degree of depth it below of flattening to former length.Consequently can significantly improve the fatigue strength of punching hole portion.
Have again, the termination of the ultrasonic vibration terminal by will impacting the punching hole end face is made as matrix, thereby the termination of ultrasonic vibration terminal is easy to coincide with the punching hole end face, can further improve the planarization of breach, the elimination of sclerotic tissue and the flattening effect of trickle be full of cracks thus.
In addition, the method for giving unrelieved stress as ultrasonic impact is handled, for the material that is suitable for, a side of high-strength material takes effect than low-intensity material is easier.This is because the unrelieved stress that a side of high-strength material is imported is difficult to cause because of additional external force redistributes such characteristic.
In Fig. 6, by with the configuration about in the of 4 ' of left and right sides ultrasonic vibration terminal, thereby left and right ultrasonic oscillator 4 ' can the phase mutual interference, therefore can more effectively carry out ultrasonic impact and handle with staggering.
Above embodiment is that example describes with the automotive wheel, but the present invention can be widely used in belt pulley, gear, crawler belt driving wheel etc. have lap fillet weld joint, the clod wash of bearing repeated load because of rotation add the Ministry of worker, punching hole use the rotator of metal sheet.
Embodiment
The embodiment of the automotive wheel by the steel plate system among the present invention illustrates effect of the present invention.
To 13 inches wheel of automobile, change treatment process and come its fatigue strength of comparison.In addition, at this employed vehicle wheel diskware, be by thickness of slab 3.2mm, intensity 690N/mm
2And thickness of slab 4.0mm, intensity 330N/mm
2Materials processing form.
Fatigue test is carried out with rotoflector moment (moment of flexure) load.Its alternation speed is 700rpm, and the bolted torque is 98Nm, and test moment is 1.47KNm.
In addition,, make the breach of the degree of depth 200 μ m artificially in the punching hole end, after test, this corresponding section is downcut, measure its crack length as the initial crack before handling.The results are shown in the table 1.
No.1 is an example, the table back of the body two sides, punching hole end face, the lap fillet weld connector portions that clod wash are added the Ministry of worker all use the termination to impact processing as the ultrasonic vibration terminal execution of convex, therefore carried out smoothedization of surface of steel plate that ultrasonic impact is handled, unrelieved stress also becomes compressive residual stress, so its fatigue lifetime is elongated, be evaluated as " OK " (well).
No.2, No.3 are example, use the termination to carry out shock treatment as the ultrasonic vibration terminal of convex to the table of bending machining portion back of the body two sides and lapped corner joint portion, and the ultrasonic vibration terminal of punching press hole end surface use matrix is carried out shock treatment.Through the further smoothing of surface of steel plate quilt that ultrasonic impact is handled, it is longer also to become fatigue lifetime, is evaluated as " OK " (well).
In addition, in the example of No.1～No.3, the surface hardness (Vickers' hardness) that applies the surface of steel plate of ultrasonic impact processing increases about 30% than non-into treatment sites.
In addition, not having hardness at the punching hole end face is 400Hv or the sclerotic tissue more than it.The breach of the 200 μ m that introduce on the surface of punching hole end face is by about 30% the degree of depth of flattening to former length.In addition, also can confirm processing trace at weld part.
No.4 is a comparative example, and because of not carrying out the processing after any processing, so machined surface is very coarse, unrelieved stress is that the part of stretching unrelieved stress is a lot, so fatigue lifetime is short, is evaluated as " NG " (bad).
No.5 is a comparative example, because of the punching hole end face after the processing has been implemented ground, so improved surperficial smoothness, but because of its unrelieved stress does not improve, so fatigue lifetime is short, is evaluated as " NG " (bad).
No.6 is a comparative example, because of shot peening has been implemented on the bending machining portion surface after the processing, so the smoothness and the unrelieved stress on surface all improve, fatigue lifetime is elongated, but for other parts then without any effect, so its effect only is of the present invention below half, is evaluated as " NG " (bad).
No.7 is that the intensity of vehicle wheel diskware is 330N/mm
2Embodiment, the table back of the body two sides of its bending machining portion, lap fillet weld connector portions all use the termination to impact processing as the ultrasonic vibration terminal of convex, the punching hole end face then uses the ultrasonic vibration terminal of matrix to impact processing, but carried out the further smoothing of surface of steel plate quilt after ultrasonic impact is handled, can obtain long-fatigue life, be evaluated as " OK " (well).
Prospects for commercial application
If use the present invention can be by to such as automotive wheel, belt pulley, gear, crawler belt driving wheel etc. The surface of lap fillet weld joint, clod wash processing department, punching hole of bearing alternate load because of rotation is real Shih-chao's acoustic vibration is processed, and long-life rotary body of fatigue strength excellence is provided. Industrial can Produce significant beneficial effect.
Claims (5)
1. the long lifetime rotator of a fatigue strength excellence, it is the rotator with two metal sheets is overlapping and lap fillet weld joint that the welding end forms, it is characterized in that, around the end, limit of this lap fillet weld joint, has the impression of handling the wide 1～5mm that forms by ultrasonic impact, the limit end radius of having implemented the end, limit that this ultrasonic impact handles is 1mm or more than it, and wherein implementing the ultrasonic vibration terminal that ultrasonic impact handles is that φ 2mm～6mm pin constitutes by diameter.
2. the long lifetime rotator of a fatigue strength excellence, it is the rotator with two metal sheets is overlapping and lap fillet weld joint that the welding end forms, it is characterized in that, on the metal sheet surface or table back of the body two sides of the root of weld of this lap fillet weld joint, have the impression of handling the wide 1～5mm forms by ultrasonic impact, the ultrasonic vibration terminal of wherein implementing the ultrasonic impact processing is to be that the pin of φ 2mm～6mm constitutes by diameter.
3. the long lifetime rotator of a fatigue strength excellence, it is the rotator that clod wash with metal sheet adds the Ministry of worker, it is characterized in that, implementing ultrasonic impact by the tensile side surface that this clod wash is added the Ministry of worker handles, the surface hardness on this tensile side surface is compared with non-handling part increases by 10% or more than it, the stretching unrelieved stress that this clod wash adds the Ministry of worker be tensile strength 50% or it is with the scope down to compression.
4. the long lifetime rotator of a fatigue strength excellence, it is the rotator with metal sheet of punching hole, it is characterized in that, by being implemented ultrasonic impact, handles the end face of this punching hole, the breach on the surface of the end face of this punching hole according to smoothedization of center line average roughness Ra to 10 μ m or below it, not having hardness on this punching hole end face is 400Hv or its above sclerotic tissue, trickle be full of cracks below the 200 μ m that produce from the surface of this punching hole end face, flattening is to 50% or its following degree of depth of former length.
5. as the long lifetime rotator of any described fatigue strength excellence in the claim 1 to 4, it is characterized in that the aforementioned metal plate is that tensile strength is 400N/mm
2Or its above steel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002333194A JP4261879B2 (en) | 2002-11-18 | 2002-11-18 | Method for producing a long-life rotating body with excellent fatigue strength |
| JP333194/2002 | 2002-11-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1711364A CN1711364A (en) | 2005-12-21 |
| CN100529113C true CN100529113C (en) | 2009-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801035046A Expired - Lifetime CN100529113C (en) | 2002-11-18 | 2003-11-17 | Long life rotating body with excellent fatigue strength and method of manufacturing the rotating body |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4261879B2 (en) |
| KR (1) | KR100676934B1 (en) |
| CN (1) | CN100529113C (en) |
| AU (1) | AU2003280831A1 (en) |
| WO (1) | WO2004046393A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4580220B2 (en) * | 2004-11-24 | 2010-11-10 | 新日本製鐵株式会社 | Fatigue performance improving structure of joint weld and fatigue performance improving method |
| JP2006175512A (en) * | 2004-12-24 | 2006-07-06 | Nippon Steel Corp | Method for increasing fatigue strength of weld zone and welded structure using the same |
| JP4490874B2 (en) * | 2005-05-25 | 2010-06-30 | 新日本製鐵株式会社 | Steel parts having splines and methods for improving their fatigue properties |
| JP4837428B2 (en) * | 2006-04-17 | 2011-12-14 | 新日本製鐵株式会社 | Ultrasonic impact treatment method for weld toe |
| JP4709697B2 (en) * | 2006-06-23 | 2011-06-22 | 新日本製鐵株式会社 | Method for improving fatigue strength of metal lap weld joints |
| KR101158103B1 (en) * | 2007-04-27 | 2012-06-22 | 신닛뽄세이테쯔 카부시키카이샤 | Chamfering device and chamfering method for metallic material |
| JP4734370B2 (en) * | 2007-04-27 | 2011-07-27 | 新日本製鐵株式会社 | Metal material chamfering apparatus and chamfering method |
| KR100894499B1 (en) * | 2008-05-14 | 2009-04-22 | (주)디자인메카 | The bearing processing system using an ultrasonic nano crystal surface modifier and processing method using the same |
| JP4987816B2 (en) * | 2008-07-28 | 2012-07-25 | 新日本製鐵株式会社 | Automatic impact processing method and automatic impact processing apparatus for improving the fatigue characteristics of welded joints |
| CN102230146B (en) * | 2011-05-06 | 2013-08-28 | 广西南南铝加工有限公司 | Method for cutting residual stress in sawing area by ultrasonic vibration after aluminum alloy medium and heavy plate prestretching |
| JP5327567B1 (en) * | 2013-03-06 | 2013-10-30 | Ｊｆｅエンジニアリング株式会社 | Peening method and welded joint |
| CN111235507A (en) * | 2018-11-29 | 2020-06-05 | 有研工程技术研究院有限公司 | Method for reducing residual stress of welded titanium alloy sheet welded cylinder structure |
| TWI773220B (en) * | 2020-03-26 | 2022-08-01 | 日商日本製鐵股份有限公司 | Bead blasting device, bead blasting method, and manufacturing method of structure |
| CN112658859A (en) * | 2020-12-02 | 2021-04-16 | 沪东中华造船(集团)有限公司 | Notch structure for improving welding fatigue strength and polishing method thereof |
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| JPS55144964A (en) * | 1979-04-17 | 1980-11-12 | Furukawa Alum Co Ltd | Manufacture of aluminum alloy wheel |
| JPS6479320A (en) * | 1987-09-19 | 1989-03-24 | Nippon Steel Corp | Improvement of material quality of metal for welding austenitic stainless steel |
| JPH081514A (en) * | 1994-06-16 | 1996-01-09 | Toshiba Corp | Surface treatment method for structure in reactor |
| JP3408687B2 (en) * | 1996-02-29 | 2003-05-19 | 三菱重工業株式会社 | Welding equipment with welding residual stress reduction device |
| US6171415B1 (en) * | 1998-09-03 | 2001-01-09 | Uit, Llc | Ultrasonic impact methods for treatment of welded structures |
| FR2794669A1 (en) * | 1999-06-08 | 2000-12-15 | Michelin Soc Tech | PROCESS FOR THE MANUFACTURE OF A METAL PART, SUCH AS A WHEEL PART FOR THE ROLLING OF A VEHICLE, AND SUCH A WHEEL |
| FR2801236B1 (en) * | 1999-11-18 | 2001-12-21 | Snecma | METHOD AND MACHINE FOR ULTRASONIC BLASTING OF WORKPIECES ON A WHEEL |
| JP2003113418A (en) * | 2001-10-04 | 2003-04-18 | Nippon Steel Corp | Method for improving fatigue life and long-life metal material |
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2002
- 2002-11-18 JP JP2002333194A patent/JP4261879B2/en not_active Expired - Fee Related
-
2003
- 2003-11-17 KR KR1020057008790A patent/KR100676934B1/en active IP Right Grant
- 2003-11-17 WO PCT/JP2003/014594 patent/WO2004046393A1/en active Application Filing
- 2003-11-17 AU AU2003280831A patent/AU2003280831A1/en not_active Abandoned
- 2003-11-17 CN CNB2003801035046A patent/CN100529113C/en not_active Expired - Lifetime
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Also Published As
| Publication number | Publication date |
|---|---|
| JP4261879B2 (en) | 2009-04-30 |
| KR20050085008A (en) | 2005-08-29 |
| JP2004169063A (en) | 2004-06-17 |
| WO2004046393A1 (en) | 2004-06-03 |
| AU2003280831A1 (en) | 2004-06-15 |
| KR100676934B1 (en) | 2007-02-02 |
| CN1711364A (en) | 2005-12-21 |
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