CN101502874A - Method for producing shock-absorbing belt pulley hub and shock-absorbing belt pulley employing the hub - Google Patents
Method for producing shock-absorbing belt pulley hub and shock-absorbing belt pulley employing the hub Download PDFInfo
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- CN101502874A CN101502874A CNA2009101285002A CN200910128500A CN101502874A CN 101502874 A CN101502874 A CN 101502874A CN A2009101285002 A CNA2009101285002 A CN A2009101285002A CN 200910128500 A CN200910128500 A CN 200910128500A CN 101502874 A CN101502874 A CN 101502874A
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Abstract
The invention relates to an elastic element or a friction damping part which is installed on an engine crankshaft, in particular to a novel shock absorption pulley. A preparation method of a hub of the novel shock absorption pulley is also provided. A vacuum die casting technology is adopted and magnesium alloy is used as raw material for preparing the hub of the shock absorption pulley. Then, the hub and a shock absorption element are integrated in a chimeric way by the mechanical chimeric technology, and the shock absorption pulley of the invention is obtained. The shock absorption pulley has the advantages of lighter and firmer structure, long service life, good shock absorption effect and lower noise.
Description
Technical field
The present invention relates to a kind of flexible member or frictional damping part that is installed on the engine crankshaft, specifically be meant a kind of novel damper pulley, and comprise the manufacture method of this novel damping belt pulley hub.
Background technology
Bent axle in the existing automobile engine is an elasticity of torsion system, itself has certain natural frequency of vibration, when engine operation, the size and Orientation that acts on the power on the bent axle all is periodically variable, bent axle produces twisting vibration because of the positive and negative swing of flywheel bigger with respect to rotary inertia, when driving frequency becomes multiple to concern with the natural frequency of vibration of bent axle, the twisting vibration of bent axle just aggravates because of resonance takes place, disperse in that the safety zone of whole torsional vibration damper is stressed, cause engine power impaired, bent axle rigidity, intensity descends, timing gears or cog belt wearing and tearing aggravation, a series of problems such as cylinder eccentric wear.Therefore available technology adopting various glissandoes reduce the infringement that above-mentioned vibration causes engine pack as far as possible.
For example, Chinese invention patent, publication number discloses a kind of vibration-proof structure for the CN1991196 name is called " a kind of automobile engine crankshaft twist vibrator ", it is made up of wheel hub, rubber ring, flywheel, wheel hub is fixed on crankshaft front end, be stained with rubber ring on the wheel hub periphery, be connected on the wheel hub across rubber ring between flywheel.The present invention can improve the torsional vibration characteristic of automobile engine crankshaft, weakens the vibration of bent axle.Overcome that the engine power that produces because of crankshaft torsional vibrations is impaired, bent axle rigidity, intensity descends, problems such as timing gears or cog belt wearing and tearing aggravation, cylinder eccentric wear, simultaneously, the spring characteristic curve of seal membrane device at first descends in described installation region and rises again then.
In addition, Chinese invention patent, publication number also discloses a kind of damping device for the CN101144517 name is called " a kind of crankshaft torsion vibration absorber for automobile engine ", it discloses a kind of crankshaft torsion vibration absorber for automobile engine, comprise outer hub, be arranged in the interior hub of described outer hub inboard and be arranged in middle hub between described outer hub and the interior hub, be provided with multistage damping device between described outer hub and the interior hub; Described multistage damping device comprises the first order damping device of absorbing high-frequency vibration and absorbs the second level damping device of low-frequency vibration; Compared with prior art, on crankshaft torsion vibration absorber for automobile engine, adopt multistage damping device, increased the yielding rubber that one-level or two-stage have different qualities, the low-frequency vibration of the belt drive system that produces when making it effectively be absorbed in engine running, simultaneously, can also effectively prolong the service life of bent axle, simple in structure, advantages such as cost is low, long service life, easy processing and manufacturing.
But, though adopted the damping wheel that is applied on the engine in the technical scheme of above-mentioned patent document, make the damping effect of engine transmission weaken greatly, effectively prevented the vibrating effect that produces in the engine transmission course, but the double layer of metal wheel hub of the damping device of existing the type generally all adopts cast iron and aluminum alloy materials, though can satisfy the basic need that the damping device of making satisfies the engine damping like this, but by its firm degree and working life all is not very desirable, owing to corroded easily in the course of work, therefore more had a strong impact on its service life simultaneously.
Therefore, the present invention just is based on a kind of lighter, more firm with respect to existing such damping wheel construction that the defective of above-mentioned prior art proposes, life-span while is longer, and damping effect is better, and the manufacture method of this damping wheel wheel hub is taken turns and made in the littler damping of noise.
Summary of the invention
It is a kind of lighter, more firm with respect to existing such damping wheel construction that goal of the invention of the present invention is to provide, and the life-span is longer, and the better simultaneously damping wheel that noise is littler of damping effect the invention also discloses the method for making this damping wheel wheel hub simultaneously.
In order to realize above-mentioned goal of the invention, the present invention adopts following technical scheme:
A kind of manufacture method of shock-absorbing belt pulley hub, it adopts vacuum die casting machine that molten magnesium alloy is pressed in the mould and forms, and its concrete steps comprise
The first step is removed the process of impurity in the magnesium alloy, for removing the gas that is mingled with in the magnesium alloy solution and the process of residue;
In second step, the assignment procedure of die parameters comprises the warm temperature of setting mould and sets the mold work process temperature;
The 3rd step, fill the injection magnesium alloy, comprise slow shot process, fast shot process and final pressurization;
In the 4th step, the Mg alloy castings that obtains is carried out Surface Finishing.
In the described first step is removed magnesium alloy in the process of impurity, use refining agent in 300kg graphite crucible resistance furnace, when the magnesium alloy solution temperature reaches more than 700 ℃, utilizing deaeration that refining agent is compressed into magnesium alloy liquation bottom slowly stirred 5-10 minutes, make impurity emersion magnesium alloy solution surface, carry out at least twice said process repeatedly.
In the process that the described second step die parameters is set, vacuumizing mould is applied on the cold chamber die-casting machine, mold preheating temperature is arranged on 180 ℃～200 ℃, it is 220 ℃～300 ℃ that the mold work temperature then keeps temperature, will be through the processing of at least twice removal of contamination in the first step, the interpolation cast temperature is 630 ℃～650 ℃ a magnesium alloy solution in mould.
Slow shot process in the process of filling injection magnesium alloy in mould of described the 3rd step adopts the speed of 0.2m/s～0.3m/s to penetrate magnesium alloy solution to mould inner pressure, extrudes will press the gas in the chamber; After pressure process slowly reaches default position or threshold values, moment transfer to the fast shot process with the further injection of magnesium alloy solution in mould, the speed that is adopted is between 1-8m/s; After magnesium alloy solution all entered mould, die casting machine adopted pressurization, and pressure is greater than the maximum pressure in the above-mentioned fast shot process, and after through default time threshold values, pressure is reduced to zero gradually and finished and once fill overall process.
A kind of damper pulley that adopts the wheel hub of said method manufacturing, comprise shellring shape structure at least, be metal annular internal wheel hub and external hub, the rubber system annular resilient element that externally is provided with between wheel hub and the inner hub, described external hub adopts accurately machined magnesium alloy to make, it contacts by mechanical pressure is chimeric with the rubber surface of flexible member, and described flexible member is entrenched on the described inner hub by mechanical pressure equally.
Described inner hub, external hub and annular resilient element are provided with one heart, be provided with the connecting hole that is used to connect axostylus axostyle in the center of inner hub, described external hub outer circumference surface is provided with several anti-slip tanks that are used for corresponding setting with belt.
In the shellring shape structure of described damper pulley, be provided with between the two-layer at least circulus and prevent to get rid of in the course of the work the disconnecting prevention structure that takes off.
Described disconnecting prevention structure is the corresponding position that is arranged between the two-layer circulus joint face, has a raised structures at least, and/or is provided with the inclined plane on the axial direction of the joint face of damper pulley shellring shape structure.
The angle of described inclined plane and axial direction is an acute angle, and the scope of this acute angle is 20 °-45.
Be provided with one deck corrosion-inhibiting coating at least between described inner hub and the flexible member.
Comprise the elastic ring of one deck rubber system at least in the described flexible member, the elastic ring of this rubber system is entrenched togather by described mechanical pressure and described inner hub and external hub.
By adopting above-mentioned technical scheme, the invention provides a kind of lighter, more firm with respect to existing such damping wheel construction, life-span is longer, and the better simultaneously damping wheel that noise is littler of damping effect the invention also discloses the method for making this damping hub cap wheel hub simultaneously.
Description of drawings
What show among Fig. 1 is the structural representation of the first embodiment of the present invention;
What show among Fig. 2 is the structural representation of the second embodiment of the present invention;
What show among Fig. 3 is the structural representation of the third embodiment of the present invention;
What show among Fig. 4 is the part-structure schematic diagram of the fourth embodiment of the present invention;
Each label proxy component title is as follows in the accompanying drawing:
1 external hub, 2 inner hub, 3 flexible members, 4 belt grooves
5 non-slip process, 6 corrosion-inhibiting coatings
The specific embodiment
Of the present inventionly be to provide a kind of lighter, more firm with respect to existing such damping wheel construction, the life-span is longer, and the better simultaneously damping wheel that noise is littler of damping effect the invention also discloses the method for making this damping wheel wheel hub simultaneously.
Embodiment one
Novel damping wheel in the first embodiment of the invention comprises shellring shape structure, as shown in Figure 1, be metal annular internal wheel hub 2 and the external hub 1 that is made of metal equally, the rubber system annular resilient element 3 that is provided with between wheel hub 1 and the inner hub 2 externally, wheel hub in this first embodiment includes external hub 1 and inner hub 2 all adopts accurately machined magnesium alloy to make, the evacuated die-casting process method that this manufacture method adopts the present invention to illustrate subsequently.Like this, external hub of being made by above-mentioned accurately machined magnesium alloy 1 and inner hub 2 are entrenched togather by mechanical pressure with the rubber layer surface of flexible member 3, form the present invention and are applied to novel hub on the motor car engine.
In addition, the power that conduction is for convenience provided by engine, inner hub 2, annular elastic element 3 and external hub 1 are provided with one heart, externally be provided with by V font belt grooves 4 on the circumference in wheel hub 1 outside simultaneously, agree with to prevent to cause in transmission course belt to break away in the belt of correspondingly-shaped, externally the two ends end face of wheel hub 1 equally also is provided with to be cooperated with above-mentioned V font belt grooves 4 by flange and concurs simultaneously.Then be provided with in the center of inner hub 2 and be used for the installing hole that is connected with the power transmission shaft of engine.
Because damping wheel of the present invention adopts mechanical pressure to be entrenched togather, therefore in the damping wheel course of work, no matter chimeric how tight, always cause the interior rubber system flexible member 3 of this damping wheel to break away after the time at the work long enough, therefore, the flexible member corresponding position that is provided with in said external wheel hub 1, inner hub and centre is provided with projection laterally, to delay or to prevent that the phenomenon of breakking away from appearring in above-mentioned flexible member 3.
In fact since novel damping of the present invention wheel can be applied on the different engines, so the structure of each layer also can be according to actual needs and different.
Embodiment two
Among second embodiment also be adopt as the shellring shape structure among top first embodiment, as shown in Figure 1, be metal annular internal wheel hub 2 and the external hub 1 that is made of metal equally, the rubber system annular resilient element 3 that is provided with between wheel hub 1 and the inner hub 2 externally, wheel hub in this first embodiment includes external hub 1 and inner hub 2 all adopts accurately machined magnesium alloy to make, the evacuated die-casting process method that this manufacture method adopts the present invention to illustrate subsequently.Like this, external hub of being made by above-mentioned accurately machined magnesium alloy 1 and inner hub 2 are entrenched togather by mechanical pressure with the rubber layer surface of flexible member 3, formation the present invention is applied to the novel hub on the motor car engine, the outside V font belt grooves 4 of external hub simultaneously.Unique difference be in, said external wheel hub 1 among this second embodiment, inner hub and the middle flexible member corresponding position that is provided with are provided with projection 5 to the inside, to delay or to prevent that the phenomenon of breakking away from appearring in above-mentioned flexible member 3.So not only provide this structure to be different from the implementation of first embodiment, passed through by to the inside but also provide, the undaform raised structures that the outside combines, obviously such effect also can be outstanding.The shape of above-mentioned projection might not be limited to the arcuate structure that is represented among above-mentioned two embodiment simultaneously, but other rule or irregular structure all can adopt, but the height of above-mentioned projection should be limited to less than half of the thinnest one deck in the three-decker, cause the prominence to be damaged easily otherwise can produce big relatively shear stress at the raised structures place.Certainly, specifically adopt the projection of which kind of shape, and adopt the height of projection need grasp flexibly according to actual conditions equally, here just do not given unnecessary details one by one.
Embodiment three
The general structure of the 3rd embodiment is identical with general structure among first embodiment described above and second embodiment, as shown in Figure 3, all adopt shellring shape structure, be metal annular internal wheel hub 2 and the external hub 1 that is made of metal equally, the rubber system annular resilient element 3 that is provided with between wheel hub 1 and the inner hub 2 externally, wheel hub in this first embodiment includes external hub 1 and inner hub 2 all adopts accurately machined magnesium alloy to make, the evacuated die-casting process method that this manufacture method adopts the present invention to illustrate subsequently.Like this, external hub of being made by above-mentioned accurately machined magnesium alloy 1 and inner hub 2 are entrenched togather by mechanical pressure with the rubber layer surface of flexible member 3, formation the present invention is applied to the novel hub on the motor car engine, the outside V font belt grooves 4 of external hub simultaneously.But in the present embodiment for prevent flexible member 3 work long enough break away after the time, then will be on the axial direction of the joint face of damper pulley shellring shape structure be provided with the inclined plane, the angle of this inclined plane and axial direction is an acute angle, the scope of this acute angle should be the some numerical value between 20 °-45 °, the effect that projection played among the effect of being played and above-mentioned first embodiment and second embodiment is identical like this, but above-mentioned angle can not can not play desirable abated effect otherwise 3 pairs of flexible members conduct the vibrations that come by motor car engine greater than 45 °.Certainly, also the technical characterictic on this inclined plane and the technical characterictic combination of above-mentioned projection can be obtained better association schemes.
Embodiment four
What show among Fig. 4 is the part-structure schematic diagram of the fourth embodiment of the present invention, general structure in the 4th embodiment can as among above-mentioned three embodiment any one or satisfy the general structure of claim technical characterictic of the present invention combination, its difference then is, between above-mentioned inner hub 2 and flexible member 3 one deck corrosion-inhibiting coating 6 is set, this corrosion-inhibiting coating 6 can prevent owing to corrosive deposit shortens its life-span with inner hub 2 and flexible member 3 corrosion.Its concrete manufacture method is by making its whole surface decontamination in the alkali degreasing solution that inner hub 2 is immersed heating, inner hub 2 after the degrease is handled (average thickness of rough surface is greatly about about 10 microns to 30 microns) through rough surface, after inner hub 2 is washed by above-mentioned alkali degreasing solution and in washing pool once more afterwards, inner hub 2 through above-mentioned processing is soaked in the chemical conversion Treatment Solution (in preferred 45 ℃ to 70 ℃ again, 5-15 minutes) just can access like this one deck zirconium corrosion-inhibiting coating 6, finished above-mentioned zirconium corrosion-inhibiting coating 6 by the environment drying of putting into 80 ℃ to 100 ℃ after the flushing in the washing pool after about 20 minutes once more afterwards.Certain this corrosion-inhibiting coating 6 can be applied in the middle of above-mentioned any one embodiment, improves the life-span of novel damping wheel of the present invention.
Need to prove also that in addition in order to improve damping efficiency of the present invention, the flexible member among each embodiment of the present invention also can adopt the setting of multilayer rubber layer, every layer of rubber layer is in order to absorb the vibration of the different frequency that passes over by engine.The specific embodiment please refer to the documents CN101144517 in the background technology, wherein the multilayer damping modes is had specific description, therefore just no longer this technical characterictic has been given unnecessary details in the present invention.
And in order to realize the more firm structure of above-mentioned novel damping wheel of the present invention, the present invention adopts following manufacturing process to finish the manufacturing of external hub 1 wherein and inner hub 2.This method mainly adopts the evacuated die-casting process technology, specifically can be decomposed into following several steps:
The first step is removed the process of impurity in the magnesium alloy, for removing the gas that is mingled with in the magnesium alloy solution and the process of residue;
In second step, the assignment procedure of die parameters comprises the warm temperature of setting mould and sets the mold work process temperature;
The 3rd step, fill the injection magnesium alloy, comprise slow shot process, fast shot process and final pressurization;
In the 4th step, the Mg alloy castings that obtains is carried out Surface Finishing.To obtain the littler Mg alloy castings surface of roughness.
Wherein each step can adopt the process with following concrete parameter again, in the described first step is removed magnesium alloy in the process of impurity, use refining agent in 300kg graphite crucible resistance furnace, when the magnesium alloy solution temperature reaches more than 700 ℃, utilizing deaeration that refining agent is compressed into magnesium alloy liquation bottom slowly stirred 5-10 minutes, make impurity emersion magnesium alloy molten surface, and carry out at least twice said process repeatedly.The multiple-effect fruit is obvious more more for the process of such removal of contamination yes number of times, but considers the needs of practical condition and cost control, preferably carries out said process three times.
In the process that the described second step die parameters is set, this product development vacuumize mould, be applied on the cold chamber die-casting machine, mold preheating temperature is arranged on 180 ℃～200 ℃, it is 220 ℃～300 ℃ that the mold work temperature then keeps temperature, will be through at least twice processing of knowing impurity in the first step, in mould, add cast temperature and be 630 ℃～650 ℃ magnesium alloy solution.If the temperature of mould or magnesium alloy solution is low excessively, will cause in the whole castings production process, magnesium alloy solution is very easy to solidify and causes foundry goods to be failed.So the setting of said temperature parameter also is vital for the manufacturing of wheel hub among the present invention.
Slow shot process in the process of filling injection magnesium alloy in mould of described the 3rd step adopts the speed of 0.2m/s～0.3m/s to penetrate to mould inner pressure and advances in the magnesium alloy solution will press the gas in the chamber to extrude; After pressure process slowly reaches default position or threshold values (this be need concrete condition is concrete to be set), moment transfers the fast shot process to, and wherein the injection speed that adopted of fast shot process is between 1-8m/s; After magnesium alloy solution all entered mould, die casting machine adopted pressurization, and pressure is greater than the maximum pressure in the above-mentioned fast whole injection process, and when process certain hour threshold values, probably after the several seconds, the pressure linearity is reduced to zero finishing and once filled overall process.
After above-mentioned foundry goods cooling, fine finishining is carried out on its surface at last, so that its surface flatness is better.To bring above-mentioned the wheel under the more firm prerequisite of hub casts, surface roughness is littler.
By the wheel hub that adopts said method to make, because its surface flatness is very little, the pore number that while unit volume inner air vent is mingled with obviously is less than other metal materials such as aluminium alloy used in the prior art and cast iron.So its mechanical chimeric more firm not only and between the flexible member 3 of rubber system is because the size of chimeric intensity is decided by to interconnect the gap size of the surface roughness of two kinds of elements.Simultaneously since the magnesium alloy hub by above-mentioned evacuated die-casting process in the number of the pore that is mingled with considerably less, also improve the intensity of the whole damping wheel of making by such wheel hub greatly, prolonged the life-span.
Obtain afterwards damper pulley of the present invention by adopting above-mentioned fabrication scheme to combine like this with the above embodiments, it is lighter, more firm with respect to existing such damping wheel construction, life-span is longer, damping effect is better, and noise is littler simultaneously, the invention also discloses the method for making this damping hub cap wheel hub simultaneously.
In addition, protection scope of the present invention is not limited in the specific embodiment in the above-mentioned specific embodiment, as long as but the combination of satisfying the technical characterictic of claims of the present invention just fallen within protection scope of the present invention.
Claims (11)
1, a kind of manufacture method of shock-absorbing belt pulley hub, it adopts vacuum die casting machine that molten magnesium alloy is pressed in the mould and forms, and it is characterized in that, and these manufacture method concrete steps comprise:
The first step is removed the process of impurity in the magnesium alloy, for removing the gas that is mingled with in the magnesium alloy solution and the process of residue;
In second step, the assignment procedure of die parameters comprises the warm temperature of setting mould and sets the mold work process temperature;
The 3rd step, fill the injection magnesium alloy, comprise slow shot process, fast shot process and final pressurization;
In the 4th step, the Mg alloy castings that obtains is carried out Surface Finishing.
2, the manufacture method of shock-absorbing belt pulley hub according to claim 1, it is characterized in that, in the described first step is removed magnesium alloy in the process of impurity, use refining agent in 300kg graphite crucible resistance furnace, when the magnesium alloy solution temperature reaches more than 700 ℃, utilize deaeration that refining agent is compressed into magnesium alloy liquation bottom and slowly stirred 5-10 minutes, make impurity emersion magnesium alloy solution surface, carry out at least twice said process repeatedly.
3, the manufacture method of shock-absorbing belt pulley hub according to claim 1, it is characterized in that, in the process that the described second step die parameters is set, vacuumizing mould is applied on the cold chamber die-casting machine, mold preheating temperature is arranged on 180 ℃～200 ℃, it is 220 ℃～300 ℃ that the mold work temperature then keeps temperature, will be through the processing of at least twice removal of contamination in the first step, and the interpolation cast temperature is 630 ℃～650 ℃ a magnesium alloy solution in mould.
4, the manufacture method of shock-absorbing belt pulley hub according to claim 1, it is characterized in that, slow shot process in the process of filling injection magnesium alloy in mould of described the 3rd step adopts the speed of 0.2m/s～0.3m/s to penetrate magnesium alloy solution to mould inner pressure, extrudes will press the gas in the chamber;
After pressure process slowly reaches default position or threshold values, moment transfer to the fast shot process with the further injection of magnesium alloy solution in mould, the speed that is adopted is between 1-8m/s;
After magnesium alloy solution all entered mould, die casting machine adopted pressurization, and pressure is greater than the maximum pressure in the above-mentioned fast shot process, and after through default time threshold values, pressure is reduced to zero gradually and finished and once fill overall process.
5, the damper pulley of the wheel hub made of a kind of method that adopts claim 1, comprise shellring shape structure at least, be metal annular internal wheel hub and external hub, the rubber system annular resilient element that externally is provided with between wheel hub and the inner hub, it is characterized in that, described external hub adopts accurately machined magnesium alloy to make, it contacts by mechanical pressure is chimeric with the rubber surface of flexible member, and described flexible member is entrenched on the described inner hub by mechanical pressure equally.
6, damper pulley according to claim 5, it is characterized in that, described inner hub, external hub and annular resilient element are provided with one heart, be provided with the connecting hole that is used to connect axostylus axostyle in the center of inner hub, described external hub outer circumference surface is provided with several anti-slip tanks that are used for corresponding setting with belt.
7, damper pulley according to claim 5 is characterized in that, in the shellring shape structure of described damper pulley, is provided with between the two-layer at least circulus and prevents to get rid of in the course of the work the disconnecting prevention structure that takes off.
8, damper pulley according to claim 7, it is characterized in that, described disconnecting prevention structure is the corresponding position that is arranged between the two-layer circulus joint face, at least have a raised structures, and/or on the axial direction of the joint face of damper pulley shellring shape structure, be provided with the inclined plane.
9, damper pulley according to claim 8 is characterized in that, the angle of described inclined plane and axial direction is an acute angle, and the scope of this acute angle is 20 °-45 °.
10, damper pulley according to claim 5 is characterized in that, is provided with one deck corrosion-inhibiting coating at least between described inner hub and the flexible member.
11, damper pulley according to claim 5, it is characterized in that, comprise the elastic ring of one deck rubber system at least in the described flexible member, the elastic ring of this rubber system is entrenched togather by described mechanical pressure and described inner hub and external hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910128500A CN100595004C (en) | 2009-03-23 | 2009-03-23 | Method for manufacturing damping belt pulley hub and damping belt pulley equipped with the hub |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910128500A CN100595004C (en) | 2009-03-23 | 2009-03-23 | Method for manufacturing damping belt pulley hub and damping belt pulley equipped with the hub |
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| Publication Number | Publication Date |
|---|---|
| CN101502874A true CN101502874A (en) | 2009-08-12 |
| CN100595004C CN100595004C (en) | 2010-03-24 |
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|---|---|---|---|
| CN200910128500A Expired - Fee Related CN100595004C (en) | 2009-03-23 | 2009-03-23 | Method for manufacturing damping belt pulley hub and damping belt pulley equipped with the hub |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101927329A (en) * | 2010-09-06 | 2010-12-29 | 重庆硕龙科技有限公司 | Vacuum high-pressure casting method |
| CN102401086A (en) * | 2011-06-29 | 2012-04-04 | 青岛地恩地材料科技有限公司 | Torsional vibration absorber |
| CN102581256A (en) * | 2012-01-13 | 2012-07-18 | 江苏华威线路设备集团有限公司 | Aluminum alloy liquid die forging manufacturing process for parts of electrified high-speed railway contact nets |
| CN102861895A (en) * | 2011-07-07 | 2013-01-09 | 吴玉荣 | Ultra-large type thin-wall complex part die-casting process |
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| CN103331432A (en) * | 2013-07-04 | 2013-10-02 | 上海交通大学 | Vacuum die casting method of rare earth-magnesium alloy |
| CN105264260A (en) * | 2013-05-24 | 2016-01-20 | 株式会社捷太格特 | Method for manufacturing damper pulley and device for manufacturing damper pulley |
| CN105541087A (en) * | 2015-12-15 | 2016-05-04 | 鹤山市凤台菱精密铸造有限公司 | Vacuum casting process |
| CN107737902A (en) * | 2017-11-29 | 2018-02-27 | 沈阳工业大学 | The high fine and close compression molding process of magnesium alloy for automobile support part |
| CN109915581A (en) * | 2017-12-12 | 2019-06-21 | 现代自动车株式会社 | Damper belt pulley and its manufacturing method for crankshaft |
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| CN110513437A (en) * | 2019-08-21 | 2019-11-29 | 亚新科噪声与振动技术（安徽）有限公司 | A kind of multi-rate torsional damper |
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| CN101927329A (en) * | 2010-09-06 | 2010-12-29 | 重庆硕龙科技有限公司 | Vacuum high-pressure casting method |
| CN102401086A (en) * | 2011-06-29 | 2012-04-04 | 青岛地恩地材料科技有限公司 | Torsional vibration absorber |
| CN102861895A (en) * | 2011-07-07 | 2013-01-09 | 吴玉荣 | Ultra-large type thin-wall complex part die-casting process |
| CN102581256A (en) * | 2012-01-13 | 2012-07-18 | 江苏华威线路设备集团有限公司 | Aluminum alloy liquid die forging manufacturing process for parts of electrified high-speed railway contact nets |
| CN103075243B (en) * | 2013-01-18 | 2016-03-30 | 无锡市贝尔机械有限公司 | The casting technique of outlet pipe of diesel engine |
| CN103075243A (en) * | 2013-01-18 | 2013-05-01 | 无锡市贝尔机械有限公司 | Water outlet pipe for diesel engines and casting process thereof |
| CN105264260A (en) * | 2013-05-24 | 2016-01-20 | 株式会社捷太格特 | Method for manufacturing damper pulley and device for manufacturing damper pulley |
| US10094462B2 (en) | 2013-05-24 | 2018-10-09 | Jtekt Corporation | Damper pulley manufacturing method and damper pulley manufacturing apparatus |
| CN103331432A (en) * | 2013-07-04 | 2013-10-02 | 上海交通大学 | Vacuum die casting method of rare earth-magnesium alloy |
| CN103331432B (en) * | 2013-07-04 | 2015-06-17 | 上海交通大学 | Vacuum die casting method of rare earth-magnesium alloy |
| CN105541087A (en) * | 2015-12-15 | 2016-05-04 | 鹤山市凤台菱精密铸造有限公司 | Vacuum casting process |
| CN107737902A (en) * | 2017-11-29 | 2018-02-27 | 沈阳工业大学 | The high fine and close compression molding process of magnesium alloy for automobile support part |
| CN109915581A (en) * | 2017-12-12 | 2019-06-21 | 现代自动车株式会社 | Damper belt pulley and its manufacturing method for crankshaft |
| CN109915581B (en) * | 2017-12-12 | 2023-02-28 | 现代自动车株式会社 | Damper pulley for crankshaft and method of manufacturing the same |
| CN110242698A (en) * | 2019-07-16 | 2019-09-17 | 芜湖大捷离合器有限公司 | A kind of torsion vibration absorber assembly |
| CN110513437A (en) * | 2019-08-21 | 2019-11-29 | 亚新科噪声与振动技术（安徽）有限公司 | A kind of multi-rate torsional damper |
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| CN100595004C (en) | 2010-03-24 |
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