CN103453114A - Pulley for chain type stepless transmission - Google Patents
Pulley for chain type stepless transmission Download PDFInfo
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- CN103453114A CN103453114A CN2013102025668A CN201310202566A CN103453114A CN 103453114 A CN103453114 A CN 103453114A CN 2013102025668 A CN2013102025668 A CN 2013102025668A CN 201310202566 A CN201310202566 A CN 201310202566A CN 103453114 A CN103453114 A CN 103453114A
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Abstract
Provided is a pulley for a chain type stepless transmission, which can be set in a shape capable of reducing management burden and meeting the demand of roughness preventing oil film formation and abrasion. In the chain type stepless transmission (CVT), the pulley faces (11, 12) of a main pulley (1) and the pulley faces (21, 22) of an auxiliary pulley (2) are respectively provided with a metal chain (3) for speed transmission, and the pulley face roughness shapes of the radial cross section of the main pulley (1) and the auxiliary pulley (2) are set with the range when the following two conditions are satisfied, that is on condition that an evaluating value based on a parameter preventing oil film forming does not exceed the sliding bound, the parameter preventing oil film forming conduct evaluation on the function of discharging lubricating oil from an oil groove and preventing oil film formation; on condition that an evaluating value based on a parameter preventing abrasion does not exceed the sintering bound, the parameter preventing abrasion conducts evaluation on the function of preventing abrasion of a boss part contacting with a pin end face.
Description
Technical field
The present invention relates to a kind of chain-type continuously variable transmission pulley, it is provided with the surface roughness shape of the pulley face of metal chain by the parameter management fixed support.
Background technique
At present, be known to the following variable v-belt drive manufacture method with pulley, its purpose is, can improve oil retention, and reproducibility is manufactured the belt CVT pulley (for example,, with reference to patent documentation 1) that wearability has improved well.
Above-mentioned pulley manufacturing method has: the grinding of shape that forms surface of contact cut operation; The slot part that forms slot part by the surface roughness alligatoring of the surface of contact by forming on surface of contact forms operation; By grinding film, the surface of the surface of contact that is formed with slot part is ground and be preserved for keeping the surface of contact of the oil groove of lubricant oil to grind and cut operation.And, the surface roughness of surface of contact is, maximum height roughness Rz below 4 μ m, the Mean length RSm of the roughness curve key element squareness Rsk that is 30～60 μ m, roughness curve is-2.7～-0.6(is without unit), the height Rpk of peak of prominence section below 0.09 μ m, the outstanding paddy degree of depth Rvk of section is 0.4～1.3 μ m.
Patent documentation 1:(Japan) JP 2011-137492 communique
But, at existing variable v-belt drive, with in the manufacture method of pulley, to realize the purpose that rises to of oil retention, manage to set the slot part shape that is formed at the pulley face by five surface roughness parameters.; due to the discharge function to suppress lubricant oil improve oil retention the slot part shape be set as target; so have thicker oil film between band and pulley; due to the existence than heavy oil film; friction factor reduces; thus, between band and pulley, produce and slide, cause the reduction of transmitting torque.And there are the following problems, because initial wear makes the sectional shape of slot part less, the discharge function of lubricant oil is lower, thus, and after durable after initial wear, the further thickening of oil film meeting, its result, produce the dysfunction that moment of torsion transmits over the slip boundary.And, due to for five surface roughness parameters, to manage the structure of pulley surface roughness shape, so the problem that exists administrative burden to increase.
In addition, the variable v-belt drive of above-mentioned patent documentation 1 record, as band, using has had the metal tape of a plurality of elements stacked, so for example No. 4323357 communique of (Japan) patent put down in writing ground, can on the pulley surface of contact of element, form oil groove.That is these two kinds of the protuberance shapes of the pulley surface of contact that, oil retention can be divided into to the oil groove shape that is formed at the pulley face, is formed at element and the management part requires function.
But, link the chain-type continuously variable transmission of the metal chain of a plurality of carrier bars as band in the situation that use by pin, pin end face that can not be less in each area of contact forms oil groove, need to be only oil groove by being formed at the pulley face and protuberance manage whole parts and require function.
Summary of the invention
The present invention is conceived to the problems referred to above and sets up, its purpose is to provide a kind of chain-type continuously variable transmission pulley, when the pulley surface roughness shape to input pulley and output pulley manages, can be set as alleviating administrative burden and meet simultaneously preventing that oil film from forming and the roughness shape of these two part requirement functions of inhibition wearing and tearing.
To achieve these goals, the pulley face that the present invention be take at the pulley face of input pulley and output pulley sets up metal chain and the chain-type continuously variable transmission that carries out speed change is prerequisite.
In this chain-type continuously variable transmission, on the pulley face of the pulley face of described input pulley and described output pulley, concentric annular ground alternately form oil groove that lubricant oil is circumferentially discharged along pulley and with the protuberance of the pin end contact of the pin of the carrier bar that links described metal chain.
As the management parameters of the pulley surface roughness shape based on described oil groove and described protuberance, use the inhibition wear coefficient that oil film forms parameter and the inhibition wearing and tearing function of the described protuberance with described pin end contact is estimated that prevents by preventing that from described oil groove removal of lubricant oily film formed function from being estimated.
And, the pulley surface roughness shape of the radial cross section of described input pulley and described output pulley is set in based on the described evaluation of estimate that prevents that oil film from forming parameter and is no more than in the scope that the condition of slip boundary and condition that the evaluation of estimate based on described inhibition wear coefficient is not less than the sintering boundary all set up.
Therefore, the pulley surface roughness shape of input pulley and output pulley is set at and prevents that evaluation of estimate that evaluation of estimate that oil film forms parameter is no more than the condition of slip boundary and suppresses wear coefficient is not less than in the scope that the condition of sintering boundary all sets up.
At this, the oil film that prevents used as the management parameters of pulley surface roughness shape forms parameter,, lubricant oil discharge function larger with the oil groove area higher more unfertile land suppress the mode of lubricant film, the oil film that prevents become as part requirement function forms the opinion scale of function.
On the other hand, the inhibition wear coefficient used as the management parameters of pulley surface roughness shape, in the less mode that more suppresses to be combined with the intermetallic of pin end face the sintering (set) that causes of protuberance area larger (smooth), wearing and tearing, become the opinion scale as the inhibition wearing and tearing function of part requirement function.
Like this, when the pulley surface roughness shape to input pulley and output pulley manages, the oil film that prevents that is conceived to part requirement function by use forms parameter and suppresses wear coefficient, can be set as alleviating administrative burden and meet simultaneously preventing that oil film from forming and suppressing the roughness shape of these two part requirement functions of wearing and tearing.
The accompanying drawing explanation
Fig. 1 (a)～(c) means the skeleton diagram as one of the chain-type continuously variable transmission of the applicable object of embodiment 1 pulley surface roughness shape management example;
Fig. 2 means the partial perspective view for the metal chain of chain-type continuously variable transmission;
Fig. 3 means the skeleton diagram for the pulley surface roughness shape of the head pulley of chain-type continuously variable transmission and auxiliary pulley;
Fig. 4 is the relation characteristic figure of oil groove area parameters Rvk and coefficientoffrictionμ;
Fig. 5 is the surface texture figure that the definition of the outstanding paddy degree of depth Rvk of section to using as oil groove area parameters Rvk describes;
Fig. 6 is the relation characteristic figure of coefficientoffrictionμ with respect to the η v/F of the judgement basis of the reference value as determining coefficientoffrictionμ;
Fig. 7 is the relation characteristic figure of the variable quantity △ Rvk of the initial value of area of contact parameter (Rsm/Delq)/RzDIN and oil groove area parameters Rvk;
Fig. 8 is the surface texture figure that the definition to the roughness curve key element Mean length Rsm for area of contact parameter (Rsm/Delq)/RzDIN describes;
Fig. 9 is the surface texture figure that the definition to the angle of groove inclination Delq for area of contact parameter (Rsm/Delq)/RzDIN describes;
Figure 10 is the surface texture figure that the definition to the maximum height roughness RzDIN for area of contact parameter (Rsm/Delq)/RzDIN describes;
Figure 11 means the performance plot of the part function establishing scope of oil groove area parameters Rvk and area of contact parameter (Rsm/Delq)/RzDIN;
Figure 12 means the performance plot of the initial range of the wearing and tearing of having considered oil groove area parameters Rvk and area of contact parameter (Rsm/Delq)/RzDIN;
Figure 13 be initial hardness (HV) and durable after the relation characteristic figure of oil groove area parameters Rvk;
Figure 14 means the operation block diagram of process flow of embodiment 1 pulley method for processing surface;
Figure 15 means the basic explanation figure that embodiment 1 thin-film grinding processing is processed;
Figure 16 means that thin-film grinding size of grain, vibration, the film in each operation of the thin-film grinding processing treating process that forms embodiment 1 carried, the operation chart of spindle speed.
Description of symbols
CVT: chain-type continuously variable transmission
1: head pulley (input pulley)
11,12: the pulley face
2: auxiliary pulley (output pulley)
21,22: the pulley face
3: metal chain
31: carrier bar
32: pin
32a, 32b: pin end face
41: slot part
42: protuberance
4: the carburizing and quenching operation
5: finish turning processing treating process
6: grind and cut the processing treating process
7: micro-processing treating process of penetrating
8: thin-film grinding processing treating process
9: grinding film
9a: abrasive particle face
91: the first grinding films
9la: abrasive particle face
92: the second grinding films
92a: abrasive particle face
Embodiment
Below, realize that based on 1 couple of embodiment shown in the drawings chain-type continuously variable transmission of the present invention describes by the preferred implementation of pulley.
[embodiment 1]
By embodiment 1 chain-type continuously variable transmission with pulley be divided into " formation of chain-type continuously variable transmission ", " pulley surface roughness shape management form ", " the processing treating process of pulley for chain-type continuously variable transmission ", " background technique ", " the setting effect of management parameters ", " management role of pulley surface roughness shape " describes.
(formation of chain-type continuously variable transmission)
Fig. 1 means one of chain-type continuously variable transmission example, and Fig. 2 means the partial perspective view of metal chain, and Fig. 3 means the skeleton diagram of pulley surface roughness shape.Below, based on Fig. 1～Fig. 3, the formation of the chain-type continuously variable transmission of the applicable object that becomes pulley surface roughness shape management is described.
As shown in Fig. 1 (a), embodiment 1 chain-type continuously variable transmission CVT is at head pulley 1(input pulley) pulley face 11,12 and auxiliary pulley 2(output pulley) pulley face 21,22 set up metal chain 3 and carry out speed change.
Pulley face 11,12(Fig. 1 (b) of the head pulley 1 formed for the fixed pulley of this chain-type continuously variable transmission CVT and movable sheave), pulley face 21,22(Fig. 1 (c) of the auxiliary pulley 2 that forms of fixed pulley and movable sheave) become the applicable object of embodiment 1 pulley surface roughness shape management.
As shown in Figure 2, above-mentioned metal chain 3 has a plurality of carrier bars 31, flexible link the pair of pin 32,32 of carrier bar 31 and form.Pair of pin 32,32 is combined by two pins of elliptical shape, but pin end face 32a, the 32b at two ends are via than the unfertile land oil film, the mode with transmitting torque contacts with pulley face 11,12,21,22.In addition, in Fig. 2, BL is the strip length direction, and BW is the bandwidth direction.
On the pulley face 21,22 of the pulley face 11,12 of above-mentioned head pulley 1 and above-mentioned auxiliary pulley 2, as illustrated in fig. 3 concentric annular ground alternately form oil groove 41 that lubricant oil is circumferentially discharged to pulley, via thinner oil film and the pin end face 32a of metal chain 3, the protuberance 42 that 32b contacts.In addition, Fig. 3 is to the device summary of in fact very complicated pulley surface roughness concaveconvex shape and illustrated.
(management of pulley surface roughness shape forms)
Fig. 4～Figure 13 means each relation characteristic figure of flow process of the range of management of the pulley surface roughness shape that derives chain-type continuously variable transmission CVT.Below, based on Fig. 4～Figure 13, pulley surface roughness shape management formation is described.
Chain-type continuously variable transmission by the basic conception of pulley is, as the management parameters of the pulley surface roughness shape based on oil groove 41 and protuberance 42, use " inhibition wear coefficient " these two parameters by preventing that from oil groove 41 removal of lubricants " preventing that oil film from forming parameter " that oily film formed function estimated, the inhibition wearing and tearing function that the protuberance 42 contacted with pin end face 32a, 32b is brought from being estimated.
And the evaluation of estimate that the pulley surface roughness shape of the radial cross section of head pulley 1 and auxiliary pulley 2 is set in to condition that evaluation of estimate based on " prevent oil film from forming parameter " is no more than the slip boundary, " inhibition wear coefficient " is not less than the scope that the condition of sintering boundary is all set up.
Below, the setting of the establishing scope of selected, the parameter based on selected of two concrete management parameters (oil groove area parameters Rvk, area of contact parameter (Rsm/Delq)/RzDIN) of using in embodiment 1 is described.
(oil groove area parameters Rvk)
As above-mentioned " preventing that oil film from forming parameter ", use the oil groove area parameters that the oil groove area of oil groove 41 is estimated, using this oil groove area parameters as the outstanding paddy degree of depth Rvk of section.
And as shown in Figure 4, the value that pulley surface roughness shape is set in to " oil groove area parameters Rvk " is slip threshold value such preventing in scope that the oil film formation condition sets up more than 0.33.At this, slip threshold value 0.33 is according to the formation as suppressing oil film and meet the reference value that the coefficientoffrictionμ of moment of torsion propagation function sets and decide.
As shown in Figure 5, above-mentioned " outstanding the paddy degree of depth Rvk of section " for example refer to, by the leveling roughness curve under the evaluation length ln of the integral multiple of datum length lr (5 times), is positioned at the mean depth of outstanding paddy section of the below of central part.That is, Fig. 5 mean altitude response based on linear load diagram (" JIS B0671-2: ' 02/lSO13565-2: ' 96),
The level error of Rk central part: the upper horizontal of central part and lower horizontal poor
Rpk peak of prominence section height: the average height of peak of prominence section that is positioned at the top of central part
The outstanding paddy of the Rvk section degree of depth: the mean depth of outstanding paddy section that is positioned at the below of central part
The load length rate of Mr1 central part: the load length rate of the defiber of peak of prominence section and central part and the intersection point of load diagram
The load length rate of Mr2 central part: the load length rate of the defiber of outstanding paddy section and central part and the intersection point of load diagram.In addition, while because of wearing and tearing, roughness curve being changed, high virgin curve (equivalent straight line) changes thereupon.Therefore, the level error Rk of central part changes, and the outstanding paddy degree of depth Rvk of section also changes.
As shown in Figure 6, above-mentioned " reference value of coefficientoffrictionμ " gets η v/F(η at transverse axis: viscosity, v: Sliding velocity, F: loading), when the longitudinal axis is got coefficientoffrictionμ, along with η v/F becomes large, to the boundary lubrication zone → Mixed lubrication zone → fluid lubrication zone transition.Now, be set as meeting the value of the coefficientoffrictionμ of moment of torsion propagation function, that is, and near the value Mixed lubrication zone that high boundary lubrication zone engaging friction coefficient μ is low from coefficientoffrictionμ.
The meaning to above-mentioned " slip threshold value " describes.In chain-type continuously variable transmission CVT, will be from the input torque of the driving sources such as motor from the input pulley via metal chain to the transmission of output pulley.Therefore, when passing to input output pulley transmitting torque, as produced the reduction of the coefficientoffrictionμ between metal chain (pin end face)-pulley (pulley face), can cause the idle running of metal chain or input pulley, produce the dysfunction that causes output torque to reduce.Therefore, the coefficientoffrictionμ when reference value of setting by the value of the generation as suppressing the transmitting torque dysfunction is transmitted moment of torsion manages, using this reference value as the slip threshold value.In addition, in actual management, for example there is the allowed band of reference value ± 10% degree.
(area of contact parameter (Rsm/Delq)/RzDIN)
As above-mentioned " inhibition wear coefficient ", the area of contact parameter that use is estimated the protuberance area of protuberance 42, be made as by this area of contact parameter the numerical value that roughness curve key element Mean length Rsm is obtained after divided by angle of groove inclination Delq and further divided by maximum height roughness RzDIN, obtain (Rsm/Delq)/RzDIN.
And, as shown in Figure 7, be less than at 0.94 o'clock at the initial value of " area of contact parameter (Rsm/Delq)/RzDIN " and can produce sintering, so the sintering threshold value of pulley surface roughness shape is made as to 0.94.At this, as shown in Figure 7, there is following relation, the initial value of area of contact parameter (Rsm/Delq)/RzDIN is less, the variable quantity △ Rvk that the wearing and tearing of oil groove area parameters Rvk cause larger (the protuberance area is little); The initial value of area of contact parameter (Rsm/Delq)/RzDIN larger (the protuberance area is large), the variable quantity △ Rvk that the wearing and tearing of oil groove area parameters Rvk cause is less.
As shown in Figure 8, the numerical value that the length of the concavo-convex generation that above-mentioned " roughness curve key element Mean length Rsm " is a periodic quantity that will comprise in the roughness curve in datum length lr averages, pass through Rsm=(1/m) formula of Σ xsi calculated.
As shown in Figure 9, above-mentioned " angle of groove inclination Delq " refers to that the secondary root mean square of the roughness curve of Tilt Datum Plane length l r tilts, by
formula calculated.
As shown in figure 10, above-mentioned " maximum height roughness RzDIN " is in for example, evaluation length ln by datum length lr integral multiple (5 times), mean value while obtaining the maximum height Zi of each datum length lr, pass through RzDIN=(1/n) formula of Σ zi calculated.In addition, the maximum value of maximum height Zi is RmaxDIN.
The meaning to above-mentioned " sintering threshold value " describes.To produce oil film because lubricants capacity is not enough and come off (non lubricant oil), the phenomenon that produces the intermetallic combination is generically and collectively referred to as sintering (set), the phenomenon produced at sliding parts such as bearings.In chain-type continuously variable transmission CVT, produce same phenomenon between metal chain (pin end face)-pulley (pulley face).When having this sintering trace, can become obstruction when sliding, become the generation reason of the dysfunction of the damage that causes metal chain.Therefore, through after initial wear durable, confirm its sintering trace, and the value of generation boundary that will become the sintering trace is as the sintering threshold value.
(setting of the establishing scope based on parameter)
As mentioned above, for the part that meets chain-type continuously variable transmission CVT requires function, as shown in the hacures of Figure 11, in the scope that the condition that the condition that the value that the pulley surface roughness shape of the radial cross section of head pulley 1 and auxiliary pulley 2 need to be set in to oil groove area parameters Rvk is the value (value more than 0.33) more than the slip boundary, the value of area of contact parameter (Rsm/Delq)/RzDIN are the above value (value more than 0.94) of sintering boundary is all set up.
Now, during the wearing and tearing of the pulley surface when part that meets chain-type continuously variable transmission CVT requires function and considers that part is used, as initial range, need to be set in the common scope (hatched area of Figure 12) that the relation extents of scope, (Rsm/Delq)/RzDIN >=(Rvk+1.2149)/0.676 this two parameters R vk, (the Rsm/Delq)/RzDIN of scope, area of contact parameter (Rsm/Delq)/RzDIN >=sintering threshold value 0.94 of oil groove area parameters Rvk >=slip threshold value 0.33 is all set up.At this; two parameters R vk have been used; (Rsm/Delq) condition of (Rsm/Delq)/RzDIN of/RzDIN >=(Rvk+1.2149)/0.676; the y=-0.0676x+0.9199 of the characteristic of the variable quantity △ Rvk that the wearing and tearing of the oil groove area parameters Rvk by presentation graphs 7 cause derives, even become the condition that exists wearing and tearing also can guarantee the friction factor (Rvk >=0.33) that reference value is above.
That is,, as shown in the arrow of Figure 12, even considered that the initial range of wearing and tearing is set as making the wearing and tearing development because of the use of part, can not exceed in the part function establishing scope yet.In addition, though the pulley surface wear at the use initial stage progress as initial wear and rapidly, through after initial wear durable, transition under the state that suppresses the wearing and tearing progress.
Then, even to after durable, also guaranteeing that the required initial hardness of surface roughness of sliding more than boundary describes.
As shown in figure 13, the pulley surface initial hardness is set as 815HV(HV: Vickers hardness).This is because as shown in figure 12, as the oil groove area parameters Rvk after durable, the slip threshold value need to be for more than 0.33.And, in order to ensure the pulley surface initial hardness, head pulley 1 has been implemented heat treatment and the shot blast based on carburizing and quenching and tempering with 2 pairs of auxiliary pulley with the pin end face 32a of metal chain 3, the pulley face 11,12,21,22 that 32b contacts.
(the processing treating process of pulley for chain-type continuously variable transmission)
Figure 14 is the operation block diagram of chain-type continuously variable transmission with pulley, and Figure 15 means the basic explanation figure that thin-film grinding processing is processed, and Figure 16 means that thin-film grinding size of grain, vibration, the film in each operation carried, the operation chart of spindle speed.Below, based on Figure 14～Figure 16, chain-type continuously variable transmission is described by the processing treating process of pulley.In addition, in the explanation of following processing treating process, in four pulley faces 11,12,21,22, the pulley face 12 of take describes as typical example.
As shown in figure 14, chain-type continuously variable transmission with pulley the abbreviation by heat treatment step 4(CQT:car burizing quenching and tempering) → finish turning processing treating process 5 → grind cuts processing treating process 6 → micro-such flow process of work treating process 7 → thin-film grinding processing treating process 8 of penetrating and manufactures.
Above-mentioned heat treatment step 4 is for making the operation of the case-hardened surperficial cure process of pulley face 12 by carburizing and quenching tempering enforcement.
Above-mentioned finish turning processing treating process 5 carries out to the surface of pulley face 12 operation that rough machined turning processing is processed for implementing.
Above-mentioned grinding cut processing treating process 6 and cut for implementing, by formed grinding wheel, accurately machined grinding carried out in the surface of pulley face 12 operation that processing is processed.
Above-mentioned micro-processing treating process 7 of penetrating is for implementing by pulley face 12 spraying microparticles being given to the operation of the processing of surface hardness.The Abrasive Particle Size that injection processing is sprayed by change, jet pressure, discharge time, bulk range etc. change hardness and roughness.At this, as surface hardness, in order to obtain requiring the hardness that requires for more than 815HV, do not carry out common injection processing, but spray the little particulate of particle diameter.This micro-penetrating is processed processing, and particle diameter is little, and correspondingly, face is pressed high, easily produces hardness, and but then, surface roughness can produce inequality.
As shown in figure 15, the above-mentioned thin-film grinding processing treating process 8 abrasive particle face 9a for the grinding film 9 by being attached with abrasive particle press on the grinding disposing of pulley face 12, the operation to numerous concentric groove to be constructed as the disc groove in appearance.As shown in figure 16, this thin-film grinding processing treating process 8 has " the first operation ", " the first operation-2 ", " the second operation ", " the 3rd operation ".
At this, in " the first operation ", the thin-film grinding size of grain is coarseness, has vibration, has film and carries, and spindle speed is constant rotational speed.In " the first operation-2 ", the thin-film grinding size of grain is coarseness, has vibration, without film, carries, and spindle speed is constant rotational speed.In " the second operation ", the thin-film grinding size of grain is coarseness, and dead-beat has film and carries, and spindle speed is constant rotational speed.In " the 3rd operation ", than the thin thin-film grinding size of grain of abrasive particle of " the first operation " and " the second operation ", be fine and closely woven granularity, vibration is arranged, there is film to carry, spindle speed is the high speed rotating speed.
In addition, " thin-film grinding size of grain " refers to the size of the abrasive particle that is attached to grinding film." vibration " refers to the radially reciprocating vibration along the pulley face of the grinding film that will press." film conveying " refers to by roller and rotates the circumferential handover along the pulley face of the grinding film that will press." spindle speed " refers to the rotating speed of the fastening and fixing pulley swivel bearing main shaft by fixture of the pulley as processing object.Below, each operation and thin-film grinding processing processing effect are described.
(the first operation)
Above-mentioned the first operation is for implementing micro-processing treating process 7(pretreatment process of penetrating of surface hardness to pulley face 12) after, by the operation of the uneven leveling of the pulley surface roughness of head pulley 1.
This first operation will be attached with the abrasive particle face 91a that the abrasive grains size is the first grinding film 91 of the abrasive particle of coarseness and press on pulley face 12, while make the first grinding film 91 vibrations carry out the film conveying and be constructed.
That is, in the first operation, owing to take the mode that the thin-film grinding size of grain is coarseness, make the abrasive grains size compare increase with the 3rd operation, so can the unit's of making abrasive grains grind that bevel is long-pending to be increased, increase the amount of removing on surface.And, due to vibration being arranged, the to-and-fro motion at high speed so abrasive particle makes progress in the footpath of pulley face 12, abrasive particle disperses the contact of pulley surface, can access the surface of homogeneous.And, owing to thering is film, carry, so can always give the new bevel that grinds to pulley surface, the processing resistance increment, grind the raising of cutting property, can stably grind and cut.And, owing to take the mode that spindle speed is constant rotational speed, make spindle speed slower than the 3rd operation, so the coefficient of kinetic friction increases, the processing resistance increment, can increase the amount of removing on surface thus.
Carry and enter no-spark and grind the operation of cutting while above-mentioned the first operation-2 for carrying out the terminal stage of the first operation that the film conveying constructs the first grinding film 91 is vibrated, stops the film of the first grinding film 91.
That is, the first operation-2 are owing to carrying without film, so the obstruction that produces abrasive particle at the first grinding film 91, the processing resistance reduces, and grinds cutting property variation.But, grind and cut and make to grind the amount of cutting and reduce if enter no-spark in the terminal stage short time of the first operation, by only grinding, cut inhomogeneous large part, suppress grinding of the inhomogeneous part diminished to cut, there is the effect of the inequality that reduces surface roughness.
(the second operation)
Above-mentioned the second operation is for so that the surface roughness parameter that the degree of depth degree of the groove that is formed at pulley surface is estimated becomes the operation that the mode of the desired value of regulation is constructed.Particularly, in the scope of the oil groove area parameters Rvk of one of parameter as the pulley surface roughness >=slip threshold value 0.33, constructed.
This second operation is forbidden the vibration of the first grinding film 91, and the abrasive particle face of the first grinding film 91 is pressed on to pulley face 12, and the first grinding film 91 is carried out the film conveying and carry out the groove construction on the pulley face.
That is, in the second operation, owing to take the mode that the thin-film grinding size of grain is coarseness, make the abrasive grains size compare increase with the 3rd operation, so the unit abrasive grains grind that bevel is long-pending becomes large, can form on surface darker concavo-convex (groove).And, owing to having forbidden vibration, so abrasive particle is fixed the contact of pulley face, the processing resistance increment, can form darker concavo-convex (groove) at pulley surface.In addition, owing to having film, carry, so can always give the new bevel that grinds to pulley surface, the processing resistance increment, grind the raising of cutting property.And it is slack-off that the mode that the spindle speed of take is constant rotational speed makes spindle speed compare with the 3rd operation, so, by the coefficient of kinetic friction is increased, the processing resistance increment, can form darker concavo-convex (groove) at pulley surface.
(the 3rd operation)
Above-mentioned the 3rd operation becomes for the surface roughness parameter the concavo-convex smooth degree formed at pulley surface being estimated the operation that the mode of the desired value of regulation is constructed.Particularly, using and constructed as the mode of another area of contact parameter (Rsm/Delq)/RzDIN >=sintering threshold value 0.94 of parameter of pulley surface roughness.
The abrasive particle face 92a that the 3rd operation will be attached with the second grinding film 92 of the abrasive particle (abrasive grains size be fine and closely woven granularity) thinner than the abrasive particle of the first operation and the second operation (the abrasive grains size is coarseness) presses on pulley face 12, make the second grinding film 92 carry out the film conveying while vibrating, pulley surface is carried out to the tabular surface construction.
; in the 3rd operation, owing to take the mode that the thin-film grinding size of grain is fine and closely woven granularity, make the abrasive grains size compare and reduce with the second operation with the first operation, so can the unit's of making abrasive grains grind that bevel is long-pending to diminish; can reduce the amount of removing on surface, and can make surface roughness good.And, owing to thering is vibration, the to-and-fro motion at high speed so abrasive particle makes progress in the footpath of pulley face 12, abrasive particle disperses the contact of pulley surface, can access the surface of homogeneous.In addition, owing to having film, carry, so can always give the new bevel that grinds to pulley surface, the processing resistance increment, grind the raising of cutting property, can stably be ground and cut.And, owing to take the mode of spindle speed as the high speed rotating speed, make spindle speed higher than the first operation and the second operation, so the coefficient of kinetic friction reduces, the processing drag reduction.Therefore, by the synergy with fine grit, can carry out fine processing, can form equably smooth face at the protuberance front end of pulley surface.
(thin-film grinding processing processing effect)
As mentioned above, in thin-film grinding processing treating process 8, in the first operation, being flattened of inequality (stabilization) of the pulley surface roughness of the pulley in pretreatment process.In ensuing the second operation, be formed for the groove of oil storage in the mode of the coefficientoffrictionμ guaranteeing to wish.In ensuing the 3rd operation, form the pulley surface of pulley in the mode of guaranteeing wearability.
; adopt following formation; thin-film grinding is processed to treating process 8 and is divided into, have inhomogeneous leveling function the first operation, have the friction factor management function based on groove processing the second operation, there is the 3rd operation of the wearability management function based on smooth processing.Therefore, by the first operation of the uneven leveling by roughness, then the second operation of construction and the surface roughness management parameters in the 3rd operation enter in establishing scope, and yield rate improves.And, by the second operation and the 3rd operation, friction factor and wearability are respectively separately and precision is managed well.
The surface roughness of pulley face is managed the profile of the pulley face surface roughness of the pulley product to extracting from mass-produced pulley product by sampling and is measured, if measured load is in suitable scope, do not change the operation specification, proceed thin-film grinding processing and process.On the other hand, if measured load departs from proper range, in the situation that offset direction is oil groove area parameters Rvk, adjust the second operation, in the situation that offset direction is area of contact parameter (Rsm/Delq)/RzDIN, adjust the 3rd operation, in the situation that offset direction is both sides, adjust the second operation and the 3rd operation.As this adjustment amount, according to operation needed time, thin-film grinding size of grain and spindle speed etc., carry out.
Its result, the mode that becomes the profile of guaranteeing friction factor and wearability with the profile of the surface roughness of pulley face is stably processed.
(background technique)
At first, the band of variable v-belt drive and the combination of pulley are described.
In the band side, be provided with flank of tooth groove at the pulley surface of contact of element, be formed with the par that is used to form lubricating film and for discharging oily slot part in pulley side.Thus, be set with for guaranteeing that moment of torsion transmits the oil discharge recess and the protuberance that is used to form oil film (with reference to No. 4323357 communique of (Japan) patent) of performance.
On the other hand, the chain of chain-type continuously variable transmission and the combination of pulley are described.
The pin section of chain side is in the textural geosynclinal concave section that uses that do not discharge.In pulley side, similarly be formed with variable v-belt drive the par that is used to form lubricating film and for discharging oily slot part.
Usually, chain-type continuously variable transmission on market for speed changer, scooter speed changer for machine outside.On the other hand, as vehicular transmission, because the conditions such as the input torque from prime mover side, moment of torsion change are strict etc., so increase the moment of torsion transfer capacity by the chain multiple row.Like this, in the chain-type continuously variable transmission used as transmission for vehicle, the contacting part that the moment of torsion transfer capacity is increased in pin and pulley room becomes high surface pressure, high temperature and the stable coefficient of kinetic friction aspect that obtains changing corresponding to moment of torsion is main points.
At this, as friction factor change essential factor, known according to previous disclosed prior art (No. 4323357 communique of (Japan) patent), the viscosity of bringing in the formation of the skin covering of the surface due to the mutual roughness of surface of contact and lubricant oil makes to form moment of torsion transport membranes and fine groove and suitably discharges the effect of remaining lubricant oil generation can not carry out swimmingly the time.
But, as mentioned above, because of the difference of chain and band, variable v-belt drive can not be made to chain-type continuously variable transmission and is used with pulley with pulley is applicable.This is because when variable v-belt drive is used with pulley as chain-type continuously variable transmission with pulley, lubricant oil discharge function variation.Therefore, as fault mode, if when utilizing heating in the slip of residual oil between pulley face and pin end face to soften, because wearing and tearing make the groove that is formed at the pulley face, disappear, may be absorbed in because producing can not travelling that sintering causes.
That is, as the problem of chain-type continuously variable transmission,
The pin end face of metal chain does not arrange drain tank.Therefore, need to will replace the not discharge ability of the drain tank of setting to be located at pulley side.
Now, if because the ability of discharging exceedingly is located at pulley side, be difficult to form oil carrying out oily film formed par, so must consider the upper limit of discharge ability.
Must consider the rheological parameters' change with time of the friction factor through using the pulley cause, the reduction of discharge ability that surface abrasion causes.
Must consider that input torque to promoting surface abrasion increases the fine groove that suppressed and the hardness of wearability, needs to ensure hardness.
As mentioned above, in the application, proposing has, when solution is accompanied by the problem newly produced to being suitable for of chain-type continuously variable transmission, the lubricant oil discharge function that the element of variable v-belt drive is shared moves to pulley side, only pulley side undertake the lubricant oil discharge function and suppress the wearing and tearing function the two the time the strict pulley surface roughness administrative skill that requires.
(the setting effect of management parameters)
As mentioned above, when pulley side is undertaken the lubricant oil discharge function and suppress the wearing and tearing function, corresponding to the setting of the management parameters of the pulley surface roughness shape of each function, become important.Below, the setting effect of the management parameters that reflects it is described.
Form parameter as the oil film that prevents of undertaking above-mentioned lubricant oil discharge function, used the outstanding paddy of the oil groove area parameters Rvk(=section degree of depth that the oil groove area of oil groove 41 is estimated).
That is, as shown in Figure 3, when the oil groove area becomes large with the oil groove area, oil groove section area S becomes large mode, becomes following relation, that is,
The outstanding paddy of oil groove area ∝ S ∝ section area A 2 ... (1).
And, as shown in Figure 5, give prominence to paddy section area A 2 and have following relation, that is,
A2∝Rvk…（2）。
Therefore, by (1), (2) formula, oil groove section area S becomes following relation, that is,
Oil groove area ∝ Rvk ... (3).
As mentioned above, the oil groove area parameters of the oil groove area of oil groove 41 being estimated can be set as oil groove area parameters Rvk by (3) formula.
As the inhibition wear coefficient of undertaking above-mentioned inhibition wearing and tearing function, the value that use obtains roughness curve key element Mean length Rsm after divided by angle of groove inclination Delq is further divided by maximum height roughness RzDIN, and the area of contact parameter (Rsm/Delq) that the protuberance area of protuberance 42 is estimated/RzDIN.
That is, as shown in Figure 3, the protuberance area becomes large with the protuberance area, and protuberance length 1 becomes large mode, the relation be constructed as follows, that is,
Protuberance area ∝ 1 ... (4).
(a) rectangular that the ideal form that the protuberance area is large is length L between protuberance length I=groove.That is, in the situation that roughness curve key element Mean length Rsm is certain, as shown in Figure 3, less with groove angle θ (≈ angle of groove inclination Delq), the mode that protuberance length I is larger, the relation be constructed as follows, that is,
1∝Rsm／Delq…（5）。
(b) in the situation that Rsm, Delq are identical shaped, as shown in Figure 3, with peak heights t(∝ RzDIN) less, the mode that protuberance length I is larger, the relation be constructed as follows, that is,
l∝1／RzDlN…（6）。
Therefore, by (4), (5), (6) formula, the protuberance area becomes following relation, that is,
Protuberance area ∝ (Rsm/Delq)/RzDIN ... (7).
As mentioned above, the area of contact parameter of the protuberance area of protuberance 42 being estimated can be set as area of contact parameter (Rsm/Delq)/RzDIN by (7) formula.
(management role of pulley surface roughness shape)
When the pulley surface roughness shape to head pulley 1 and auxiliary pulley 2 manages, need to be set as meeting the roughness shape that prevents oil film formation and suppress these two part requirement functions of wearing and tearing simultaneously.Below, the pulley surface roughness shape management role that reflects it is described.
For the part that meets chain-type continuously variable transmission CVT requires function, as shown in the hacures of Figure 11, the scope that the condition that the condition that the value that the pulley surface roughness shape of the radial cross section of head pulley 1 and auxiliary pulley 2 is set in oil groove area parameters Rvk is the above value (value 0.33 or more) of slip boundary and the value of area of contact parameter (Rsm/Delq)/RzDIN are the value (value more than 0.94) more than the sintering boundary is all set up.
At this, as the management parameters of pulley surface roughness shape and the oil groove area parameters Rvk used is higher with the lubricant oil discharge function from oil groove 41, more unfertile land suppresses lubricant film, and can guarantee the mode of coefficientoffrictionμ, the oil film that prevents become as part requirement function forms the opinion scale of function.
On the other hand, as the management parameters of pulley surface roughness shape and the area of contact parameter (Rsm/Delq) of using/RzDIN with protuberance area larger (smooth), will wear and tear and suppress littlely, and can prevent the mode of intermetallic in conjunction with the sintering (set) caused, become the opinion scale as the inhibition wearing and tearing function of part requirement function.
Like this, when the pulley surface roughness shape to head pulley 1 and auxiliary pulley 2 manages, be conceived to oil groove area parameters Rvk and these two management parameters of area of contact parameter (Rsm/Delq)/RzDIN of part requirement function by use, can be set as realizing alleviating and meet simultaneously and preventing that oil film from forming and suppressing the roughness shape that these two parts of wearing and tearing require function of administrative burden.
And, during the wearing and tearing of the pulley surface when the part that meets chain-type continuously variable transmission CVT requires function and considers that part is used, as shown in the hatched area of Figure 12, the initial roughness shape of pulley surface is set in the common scope that the relation extents of scope, the scope of (Rsm/Delq)/RzDIN >=sintering threshold value 0.94, (Rsm/Delq)/RzDIN >=(Rvk+1.2149)/0.676 of Rvk >=slip threshold value 0.33 such two parameters R vk, (Rsm/Delq)/RzDIN is all set up.
In this case, as shown in Figure 6, the mode that is present in the target zone in boundary lubrication zone with initial oil slick thickness manages.Afterwards, even, because use makes the wearing and tearing development, also as illustrated in fig. 6, manage in the mode in the scope of the oil slick thickness in guaranteeing part performance (reference value of coefficientoffrictionμ).
Therefore,, also can meet simultaneously and prevent that oil film from forming and suppressing the roughness shape of these two part requirement functions of wearing and tearing because use makes the wearing and tearing development even the initial roughness shape of pulley surface can be set as.
Then, as shown in figure 13, the pulley surface initial hardness is set as 815HV(HV: Vickers hardness).When guaranteeing this pulley surface initial hardness, heat treatment and shot blast that the pin end face 32a of 2 pairs of head pulley 1 and auxiliary pulley and metal chain 3, the pulley face 11,12,21,22 that 32b contacts are implemented based on carburizing and quenching and tempering.
Therefore, as the pulley surface initial hardness, the initial hardness of the condition by being set as meeting the oil groove area parameters Rvk after durable, even also can guarantee the surface roughness of sliding more than boundary after durable.
Then, effect is described.
At embodiment 1 chain-type continuously variable transmission with in pulley, accessing following effect.
(1) set up the chain-type continuously variable transmission CVT that metal chain 3 carries out speed change on the pulley face 21,22 of the pulley face 11,12 of input pulley (head pulley 1) and output pulley (auxiliary pulley 2) in,
On the pulley face 21,22 of the pulley face 11,12 of above-mentioned input pulley (head pulley 1) and above-mentioned output pulley (auxiliary pulley 2), concentric annular ground alternately forms the pin end face 32a of the pin 32,32 of oil groove 41 that lubricant oil is circumferentially discharged along pulley and carrier bar 31 with linking above-mentioned metal chain 3, the protuberance 42 that 32b contacts
Management parameters as the pulley surface roughness shape based on above-mentioned oil groove 41 and raised part 42, form with the oil film that prevents to by preventing from above-mentioned oil groove 41 removal of lubricants that oily film formed function from being estimated the inhibition wear coefficient that the inhibition wearing and tearing function of parameter and raised part 42 to contacting with above-mentioned pin end face 32a, 32b is estimated
The pulley surface roughness shape of the radial cross section of above-mentioned input pulley (head pulley 1) and above-mentioned output pulley (auxiliary pulley 2) is set in to the scope that condition that evaluation of estimate that the above-mentioned evaluation of estimate that prevents that oil film from forming parameter is no more than the condition of slip boundary and above-mentioned inhibition wear coefficient is not less than the sintering boundary is all set up.
Therefore, when the pulley surface roughness shape to input pulley (head pulley 1) and output pulley (auxiliary pulley 2) manages, can be set as alleviating and realize administrative burden and meet simultaneously preventing that oil film from forming and suppressing the roughness shape of these two part requirement functions of wearing and tearing.
(2) prevent that as above-mentioned oil film from forming parameter, use the oil groove area parameters that the oil groove area of above-mentioned oil groove 41 is estimated,
As above-mentioned inhibition wear coefficient, use the area of contact parameter that the protuberance area of raised part 42 is estimated,
The scope that the condition that the condition that the value that the pulley surface roughness shape of the radial cross section of above-mentioned input pulley (head pulley 1) and above-mentioned output pulley (auxiliary pulley 2) is set in to above-mentioned oil groove area parameters is the above value of slip boundary and the value of above-mentioned area of contact parameter are the above value of sintering boundary is all set up.
Therefore, on the basis of the effect of (1), by using the oil groove area parameters that the oil groove area of oil groove 41 is estimated and the area of contact parameter that the protuberance area of protuberance 42 is estimated, the management of pulley surface roughness shape can be prevented to oil film forms and suppress the roughness shape of these two part requirement functions of wearing and tearing for meet simultaneously.
(3) in the roughness curve of the evaluation length ln of the integral multiple of datum length lr, to be positioned at central part below outstanding paddy section mean depth the outstanding paddy section degree of depth be made as Rvk, the roughness curve key element Mean length that the length of concavo-convex generation that is contained in a periodic quantity of the roughness curve in datum length lr is averaged is made as Rsm, the angle of groove inclination that the secondary root mean square of the roughness curve based on datum length lr is tilted is made as Delq, by in the evaluation length ln of integral multiple datum length lr, when the mean value of the maximum height of each datum length lr is set as maximum height roughness RzDIN,
Above-mentioned oil groove area parameters is set as to the above-mentioned outstanding paddy degree of depth Rvk of section,
By above-mentioned area of contact setting parameter for by above-mentioned roughness curve key element Mean length Rsm divided by above-mentioned angle of groove inclination Delq after (Rsm/Delq)/RzDIN of further obtaining divided by above-mentioned maximum height roughness RzDIN of resulting value,
The value that above-mentioned pulley surface roughness shape is set in to above-mentioned oil groove area parameters Rvk is that the value that prevent oil film formation condition and above-mentioned area of contact parameter (Rsm/Delq)/RzDIN of slip threshold value more than 0.33 is the scope that the inhibition abrasive conditions of sintering threshold value more than 0.94 all set up.
Therefore, on the basis of the effect of (2), as management parameters, mean the oil groove area parameters Rvk of lubricant oil discharge function, the area of contact parameter (Rsm/Delq) that expression suppresses the wearing and tearing function/RzDIN by use, can be by the management of pulley surface roughness shape for meet the shape of two parts requirement functions simultaneously.
(4) will consider that the initial roughness shape of above-mentioned pulley surface after the running-in wear of above-mentioned pulley surface is set in the common scope that the relation extents of the scope of the scope of above-mentioned groove depth parameters R vk >=slip threshold value 0.33, above-mentioned area of contact parameter (Rsm/Delq)/RzDIN >=sintering threshold value 0.94, (Rsm/Delq)/RzDIN >=(Rvk+1.2149)/0.676 this two parameters R vk, (Rsm/Delq)/RzDIN is all set up.
Therefore, on the basis of the effect of (3), no matter whether because of use, cause the wearing and tearing of pulley surface, can both be by the initial roughness shape management of pulley surface for meet the shape that two parts require functions simultaneously.
(5) above-mentioned input pulley (head pulley 1) and above-mentioned output pulley (auxiliary pulley 2) are implemented based on carburizing and quenching and tempering by the pin end face 32a to above-mentioned metal chain 3, pulley face 11,12,21,22 that 32b contacts heat treatment and shot blast, be set as 815HV(HV by the pulley surface initial hardness: Vickers hardness).
Therefore, on the basis of the effect of (1)～(4), by the setting of pulley surface initial hardness, suppress the wearing and tearing development that pulley is used the pulley surface caused, thus, even also can guarantee the surface roughness of sliding more than boundary after durable.
(6) the abrasive particle face 9a of above-mentioned input pulley (head pulley 1) and above-mentioned output pulley (auxiliary pulley 2) grinding film 9 by will be attached with abrasive particle presses on the grinding disposing with the pin end face 32a of above-mentioned metal chain 3, pulley face 11,12,21,22 that 32b contacts, form above-mentioned oil groove 41 and raised part 42
Above-mentioned oil groove 41 presses on above-mentioned pulley face 11,12,21,22 by the abrasive particle face 91a of the first grinding film 91, only above-mentioned the first grinding film 91 is carried out to film conveying construction,
The abrasive particle face 92a that raised part 42 will be attached with the second grinding film 92 of the abrasive particle thinner than the abrasive particle of above-mentioned the first grinding film 91 presses on above-mentioned pulley face 11,12,21,22, while above-mentioned the second grinding film 92 is vibrated, carries out film conveying construction.
Therefore, on the basis of the effect of (1)～(5), the different thin-film grinding that the processing that will be out of shape to the profile of the surface roughness of guaranteeing friction factor and wearability is connected by the parameter management from pulley surface roughness shape is processed and is constructed, thus, can be reliably and stably obtain the pulley surface roughness shape of wishing.
Above, based on 1 pair of chain-type continuously variable transmission of the present invention of embodiment, with pulley, be illustrated, but concrete formation is not limited to this embodiment 1, only otherwise break away from the invention aim that claim will be protected, allow the change of design and append etc.
In embodiment 1, as preventing that oil film from forming parameter, example use the example of oil groove area parameters Rvk.But, as preventing that oil film from forming parameter, as long as for to by prevent the parameter that oily film formed function is estimated from the oil groove removal of lubricant, also can for example, for using parameter beyond oil groove area parameters Rvk (, oil groove section area etc.).
In embodiment 1, as suppressing wear coefficient, example the example of use area of contact parameter (Rsm/Delq)/RzDIN.But, as suppressing wear coefficient, as long as the parameter of being estimated for the wearing and tearing of the inhibition to the protuberance with pin end contact function, also can for example, for using parameter beyond area of contact parameter (Rsm/Delq)/RzDIN (, smooth area ratio etc.).
Claims (7)
1. a chain-type continuously variable transmission pulley, this chain-type continuously variable transmission sets up metal chain and carries out speed change on the pulley face of the pulley face of input pulley and output pulley, and described chain-type continuously variable transmission is characterised in that with pulley,
On the pulley face of the pulley face of described input pulley and described output pulley, concentric annular ground alternately form oil groove that lubricant oil is circumferentially discharged along pulley and with the protuberance of the pin end contact of the pin of the carrier bar that links described metal chain,
Management parameters as the pulley surface roughness shape based on described oil groove and described protuberance, use is to the inhibition wear coefficient that oil film forms parameter and the inhibition wearing and tearing function of the described protuberance with described pin end contact is estimated that prevents by preventing that from described oil groove removal of lubricant oily film formed function from being estimated
The pulley surface roughness shape of the radial cross section of described input pulley and described output pulley is set in based on the described evaluation of estimate that prevents that oil film from forming parameter and is no more than in the scope that the condition of slip boundary and condition that the evaluation of estimate based on described inhibition wear coefficient is not less than the sintering boundary all set up.
2. chain-type continuously variable transmission pulley as claimed in claim 1, is characterized in that,
Prevent that as described oil film from forming parameter, use the oil groove area parameters that the oil groove area of described oil groove is estimated,
As described inhibition wear coefficient, use the area of contact parameter that the protuberance area of described protuberance is estimated,
The pulley surface roughness shape of the radial cross section of described input pulley and described output pulley is set in the scope that condition that the value of condition that the value of described oil groove area parameters is the value more than the slip boundary and described area of contact parameter is the value more than the sintering boundary all sets up.
3. chain-type continuously variable transmission pulley as claimed in claim 2, is characterized in that,
In the roughness curve of the evaluation length of the integral multiple of datum length, to be positioned at central part below outstanding paddy section mean depth the outstanding paddy section degree of depth be made as Rvk, roughness curve key element Mean length after the length of concavo-convex generation that is contained in a periodic quantity of the roughness curve in datum length is averaged is made as Rsm, the angle of groove inclination that the secondary root mean square of the roughness curve based on datum length is tilted is made as Delq, will be in the evaluation length of the integral multiple of datum length, when the mean value of the maximum height of each datum length is made as maximum height roughness RzDIN,
Described oil groove area parameters is made as to the described outstanding paddy degree of depth Rvk of section,
Described area of contact parameter is made as, the value that the value that described roughness curve key element Mean length Rsm is obtained after divided by described angle of groove inclination Delq obtains divided by described maximum height roughness RzDIN again, that is, and (Rsm/Delq)/RzDIN,
The value that the value that described pulley surface roughness shape is set in to described oil groove area parameters Rvk is the condition of slip threshold value more than 0.33 and described area of contact parameter (Rsm/Delq)/RzDIN is in the scope all set up of the condition of sintering threshold value more than 0.94.
4. chain-type continuously variable transmission pulley as claimed in claim 3, is characterized in that,
The initial roughness shape of described pulley surface of having considered the wearing and tearing of described pulley surface is set in the common scope that the relation extents of scope, (Rsm/Delq)/RzDIN >=(Rvk+1.2149)/0.676 this two parameters R vk, (the Rsm/Delq)/RzDIN of scope, described area of contact parameter (Rsm/Delq)/RzDIN >=sintering threshold value 0.94 of described groove depth parameters R vk >=slip threshold value 0.33 all sets up.
5. chain-type continuously variable transmission pulley as described as any one in claim 1～4, is characterized in that,
Described input pulley and described output pulley are implemented heat treatment and the shot blast based on carburizing and quenching and tempering by the pulley face to the pin end contact with described metal chain, more than the pulley surface initial hardness is set as to 815 Vickers hardnesses (HV).
6. chain-type continuously variable transmission pulley as described as any one in claim 1～4, is characterized in that,
The abrasive particle face of described input pulley and the described output pulley grinding film by will be attached with abrasive particle presses on the grinding disposing with the pulley face of the pin end contact of described metal chain, forms described oil groove and described protuberance,
Described oil groove is pressed the abrasive particle of the first grinding film towards described pulley face, only described the first grinding film is carried out to film conveying construction,
Described protuberance will be attached with the abrasive particle of the second grinding film of the abrasive particle thinner than the abrasive particle of described the first grinding film and press towards described pulley face, while make described the second grinding film vibration carry out film conveying construction.
7. chain-type continuously variable transmission pulley as claimed in claim 5, is characterized in that,
The abrasive particle face of described input pulley and the described output pulley grinding film by will be attached with abrasive particle presses on the grinding disposing with the pulley face of the pin end contact of described metal chain, forms described oil groove and described protuberance,
Described oil groove is pressed the abrasive particle of the first grinding film towards described pulley face, only described the first grinding film is carried out to film conveying construction,
Described protuberance will be attached with the abrasive particle of the second grinding film of the abrasive particle thinner than the abrasive particle of described the first grinding film and press towards described pulley face, while make described the second grinding film vibration carry out film conveying construction.
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| JP2012120812A JP5717145B2 (en) | 2012-05-28 | 2012-05-28 | Pulley for chain type continuously variable transmission |
| JP2012-120812 | 2012-05-28 |
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| CN114193083A (en) * | 2020-09-17 | 2022-03-18 | 宝山钢铁股份有限公司 | Spinning wheel preparation method suitable for spinning forming process of internal and external tooth parts |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013245782A (en) | 2013-12-09 |
| CN103453114B (en) | 2016-08-17 |
| JP5717145B2 (en) | 2015-05-13 |
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