CN103453114B - Chain-type continuously variable transmission pulley - Google Patents

Abstract

A kind of chain-type continuously variable transmission pulley, when the pulley surface roughness shape of input pulley and output pulley is managed, it is possible to be set as alleviating administrative burden and meet simultaneously and prevent oil film from being formed and the roughness shape of suppression abrasion the two part requirements function.The pulley face (11,12) of head pulley (1) and the pulley face (21,22) of auxiliary pulley (2) set up metallic bond (3) and carries out in the chain-type continuously variable transmission (CVT) of speed change, the pulley surface roughness shape of head pulley (1) and the radial section of auxiliary pulley (2) is set in the scope that following two condition is set up simultaneously, i.e., prevent oil film from forming the evaluation of estimate of parameter less than the condition of slip boundary based on having, described in prevent from oil film from forming parameter the function by preventing oil film from being formed from oil groove removal of lubricant is evaluated；Evaluation of estimate based on suppression wear coefficient is not less than the condition of sintering boundary, and described suppression wear coefficient pair is evaluated with the suppression abrasion function of the protuberance of pin end contact.

Description

Chain-type continuously variable transmission pulley

Technical field

The present invention relates to a kind of chain-type continuously variable transmission pulley, it is provided with the cunning of metallic bond by parameter management fixed support The surface roughness shape of wheel face.

Background technology

At present, it is known to the manufacture method of following variable v-belt drive pulley, its object is to, it is possible to improve oil Retentivity, and repeatability manufactures the belt CVT pulley (for example, referring to patent documentation 1) that mar proof improves well.

Above-mentioned pulley manufacturing method has: form the grinding operation of the shape of contact surface；By the contact surface that will be formed Surface roughness is roughened and forms the groove portion formation process in groove portion on the contact surface；Connect being formed with groove portion by grinding film The surface of contacting surface is ground and is preserved for keeping the contact surface grinding operation of the oil groove of lubricating oil.And, the table of contact surface Surface roughness is, maximum height roughness Rz below 4 μm, average length RSm of roughness curve key element be 30～60 μm, thick Degree of skewness Rsk of roughness curve is-2.7～-0.6(without unit), peak of prominence portion height Rpk is below 0.09 μm, prominent paddy Portion's degree of depth Rvk is 0.4～1.3 μm.

Patent documentation 1:(Japan) JP 2011-137492 publication

But, in the manufacture method of existing variable v-belt drive pulley, to realize rising to of oil retention Purpose, sets the groove portion shape being formed at pulley face by five surface roughness parameter management.That is, due to suppress lubrication Oil discharge function and improve the target that is set as of the groove portion shape of oil retention, so band with pulley between there are thicker Oil film, due to the existence of relatively heavy oil film, coefficient of friction reduces, and thus, produces and slide between band and pulley, cause transmission to be turned round The reduction of square.And, there are the following problems, and the cross sectional shape making groove portion due to initial wear is the least, the discharge merit of lubricating oil Can be the lowest, thus, resistance to after initial wear, oil film can be the most thickening long afterwards, and its result exceedes slip boundary and produces The dysfunction of raw moment of torsion transmission.It is additionally, since as using five surface roughness parameters to manage pulley surface roughness shape , so there is the problem that administrative burden increases in the structure of shape.

It addition, the variable v-belt drive that above-mentioned patent documentation 1 is recorded, as band, use and have the multiple element of stacking Metal tape, so the described ground of such as No. 4323357 publication of (Japanese) patent, it is possible to formed on the pulley contact faces of element Oil groove.I.e., it is possible to protuberance oil retention is divided into the oil groove shape being formed at pulley face, being formed at the pulley contact faces of element Shape both and manage part requirements function.

But, in the case of using the metallic bond being linked multiple carrier bar by the pin chain-type continuously variable transmission as band, Oil groove can not be formed at the pin end face that each contact area is less, need only to be managed by the oil groove and protuberance being formed at pulley face Manage whole part requirements functions.

Summary of the invention

The present invention is conceived to the problems referred to above and sets up, and its object is to provide a kind of chain-type continuously variable transmission sliding Wheel, when being managed with the pulley surface roughness shape exporting pulley input pulley, it is possible to is set as alleviating management negative Load the simultaneously satisfied roughness shape preventing oil film formation and suppression abrasion the two part requirements function.

To achieve these goals, the present invention sets metal with the pulley face frame in the pulley face of input pulley and output pulley Chain and premised on carrying out the chain-type continuously variable transmission of speed change.

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 it is alternatively formed the oil groove discharged by lubricating oil and the pin with the carrier bar linking described metallic bond along pulley circumference The protuberance of pin end contact.

As the management parameters of pulley surface roughness shape based on described oil groove and described protuberance, use to by from Described oil groove removal of lubricant and the function that prevents oil film from being formed is evaluated prevent oil film formed parameter and to described pin The suppression wear coefficient that the suppression abrasion function of the described protuberance of end contact is evaluated.

And, the pulley surface roughness shape of described input pulley and the radial section of described output pulley is set in Based on the described evaluation of estimate preventing oil film from forming parameter less than the condition of slip boundary and based on described suppression wear coefficient Evaluation of estimate be not less than sintering boundary condition all set up in the range of.

Therefore, the pulley surface roughness shape of input pulley and output pulley is set at and prevents oil film from forming parameter The condition that evaluation of estimate is not less than sintering boundary less than the condition of slip boundary and the evaluation of estimate of suppression wear coefficient is all set up In the range of.

Here, the oil film that prevents used as the management parameters of pulley surface roughness shape forms parameter, with oil groove face The biggest long-pending, the mode of lubricating oil discharge function the highest the most more unfertile land suppression lubricating oil film, becomes preventing as part requirements function Only oil film forms the opinion scale of function.

On the other hand, the suppression wear coefficient used as the management parameters of pulley surface roughness shape, with protuberance face Long-pending the biggest (smooth), abrasion are the least, more suppress and sell the mode combining the sintering (set) caused between the metal of end face, becoming Opinion scale as the suppression abrasion function of part requirements function.

So, when input pulley is managed with the pulley surface roughness shape exporting pulley, by using Eye forms parameter and suppression wear coefficient in the oil film that prevents of part requirements function, it is possible to be set as alleviating administrative burden the most simultaneously Meet and prevent oil film from being formed and the roughness shape of suppression abrasion the two part requirements function.

Accompanying drawing explanation

Fig. 1 (a)～(c) are the chain types of the applicable object of the pulley surface roughness shape management being denoted as embodiment 1 The skeleton diagram of one of buncher example；

Fig. 2 is the partial perspective view representing the metallic bond for chain-type continuously variable transmission；

Fig. 3 is to represent for the head pulley of chain-type continuously variable transmission and the outline of the pulley surface roughness shape of auxiliary pulley Figure；

Fig. 4 is the relation characteristic figure of oil groove area parameters Rvk and coefficientoffrictionμ；

Fig. 5 is the superficiality that the definition to prominent valley degree of depth Rvk used as oil groove area parameters Rvk illustrates Shape figure；

Fig. 6 is that the coefficientoffrictionμ relation relative to the η v/F of the judgement basis as the reference value determining coefficientoffrictionμ is special Property figure；

Fig. 7 is initial value and the variable quantity △ of oil groove area parameters Rvk of contact area parameter (Rsm/Delq)/RzDIN The relation characteristic figure of Rvk；

Fig. 8 is to roughness curve key element average length Rsm for contact area parameter (Rsm/Delq)/RzDIN The surface texture figure that definition illustrates；

Fig. 9 is that the definition to the angle of groove inclination Delq for contact area parameter (Rsm/Delq)/RzDIN illustrates Surface texture figure；

Figure 10 is that the definition to maximum height roughness RzDIN for contact area parameter (Rsm/Delq)/RzDIN is entered The surface texture figure of row explanation；

Figure 11 is that the part function representing oil groove area parameters Rvk and contact area parameter (Rsm/Delq)/RzDIN is set up The performance plot of scope；

Figure 12 is to represent to consider oil groove area parameters Rvk and the abrasion of contact area parameter (Rsm/Delq)/RzDIN The performance plot of initial range；

Figure 13 is initial hardness (HV) and the relation characteristic figure of resistance to oil groove area parameters Rvk long afterwards；

Figure 14 is the operation block diagram of the process flow of the pulley method for processing surface representing embodiment 1；

Figure 15 is the basic explanation figure of the thin-film grinding processed representing embodiment 1；

Figure 16 is that the thin-film grinding granule in each operation representing the thin-film grinding processed operation constituting embodiment 1 is big Little, vibration, thin film conveying, the activity list figure of the speed of mainshaft.

Description of symbols

CVT: chain-type continuously variable transmission

1: head pulley (input pulley)

11,12: pulley face

2: auxiliary pulley (output pulley)

21,22: pulley face

3: metallic bond

31: carrier bar

32: pin

32a, 32b: pin end face

41: groove portion

42: protuberance

4: carburizing and quenching operation

5: finish turning processed operation

6: grinding processed operation

7: micro-penetrate processed operation

8: thin-film grinding processed operation

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

Detailed description of the invention

Hereinafter, based on the embodiment 1 shown in the drawings chain-type continuously variable transmission pulley preferred real to realizing the present invention The mode of executing illustrates.

[embodiment 1]

The chain-type continuously variable transmission pulley of embodiment 1 is divided into " composition of chain-type continuously variable transmission ", " pulley surface is thick Rugosity shape management constitute ", " the processed operation of chain-type continuously variable transmission pulley ", " background technology ", " management parameters Setting effect ", " pulley surface roughness shape management role " illustrate.

(composition of chain-type continuously variable transmission)

Fig. 1 represents one of chain-type continuously variable transmission example, and Fig. 2 represents the partial perspective view of metallic bond, and Fig. 3 represents pulley surface The skeleton diagram of roughness shape.Hereinafter, based on Fig. 1～Fig. 3 applicable object to becoming the management of pulley surface roughness shape The composition of chain-type continuously variable transmission illustrates.

As shown in Fig. 1 (a), the chain-type continuously variable transmission CVT of embodiment 1 head pulley 1(input pulley) pulley face 11, 12 and auxiliary pulley 2(output pulleys) pulley face 21,22 set up metallic bond 3 carry out speed change.

Pulley face 11,12 for the head pulley 1 that fixed block and the movable sheave of this chain-type continuously variable transmission CVT are constituted The pulley face 21 of auxiliary pulley 2 that (Fig. 1 (b)), fixed block and movable sheave are constituted, 22(Fig. 1 (c)) become the cunning of embodiment 1 The applicable object of wheel surface roughness shape management.

As in figure 2 it is shown, above-mentioned metallic bond 3 have multiple carrier bar 31, flexibly link carrier bar 31 pair of pin 32,32 and Constitute.Pair of pin 32,32 is combined by the two of elliptical shape pins, and pin end face 32a, the 32b at two ends are via relatively unfertile land oil film Contact with pulley face 11,12,21,22 in the way of can transmitting moment of torsion.It addition, in fig. 2, BL is strip length direction, and BW is band Width.

On the pulley face 11,12 of above-mentioned head pulley 1 and the pulley face 21,22 of above-mentioned auxiliary pulley 2, same as illustrated in fig. 3 The heart be alternatively formed annularly lubricating oil is discharged to pulley circumference oil groove 41, via the pin end of relatively thin oil film Yu metallic bond 3 The protuberance 42 of face 32a, 32b contact.It addition, the device that Fig. 3 is to actually very complicated pulley surface roughness concaveconvex shape Outline also illustrates.

(management of pulley surface roughness shape is constituted)

Fig. 4～Figure 13 is the range of management representing the pulley surface roughness shape deriving chain-type continuously variable transmission CVT Each relation characteristic figure of flow process.Hereinafter, based on Fig. 4～Figure 13, pulley surface roughness shape management composition is illustrated.

The basic conception of chain-type continuously variable transmission pulley is, coarse as pulley surface based on oil groove 41 and protuberance 42 The management parameters of degree shape, uses and is evaluated the function by preventing oil film from being formed from oil groove 41 removal of lubricant The suppression abrasion function that the protuberance 42 contacted with pin end face 32a, 32b " prevents oil film from forming parameter ", bring is evaluated " suppression wear coefficient " the two parameter.

And, the pulley surface roughness shape of head pulley 1 and the radial section of auxiliary pulley 2 is set in based on " preventing Oil film forms parameter " evaluation of estimate be not less than sintering circle less than the condition of slip boundary, the evaluation of estimate of " suppression wear coefficient " The scope that the condition of limit is all set up.

Hereinafter, to concrete two management parameters (oil groove area parameters Rvk, the contact area parameter used in embodiment 1 (Rsm/Delq)/RzDIN) selected, establishing scope based on selected parameter be set for explanation.

(oil groove area parameters Rvk)

As above-mentioned " preventing oil film from forming parameter ", use the oil groove area ginseng that the oil groove area to oil groove 41 is evaluated Number, using this oil groove area parameters as prominent valley degree of depth Rvk.

And, as shown in Figure 4, pulley surface roughness shape is set in the value of " oil groove area parameters Rvk " for sliding Boundary value more than 0.33 is such to be prevented in the range of the establishment of oil film formation condition.Here, slip boundary value 0.33 is according to conduct The formation of suppression oil film also meets the coefficientoffrictionμ of moment of torsion transmission function and the reference value that sets determines.

As it is shown in figure 5, above-mentioned " prominent valley degree of depth Rvk " refers to commenting integral multiple (such as 5 times) of datum length lr In planarizing roughness curve under valency length ln, it is positioned at the mean depth of the prominent valley of the lower section of central part.That is, Fig. 5 table Show altitude response based on linear load curve (" JIS B0671-2: ' 02/lSO13565-2: ' 96),

The level error of Rk central part: the upper horizontal of central part and the difference of lower horizontal

Rpk peak of prominence portion height: be positioned at the average height in the peak of prominence portion of the top of central part

Rvk highlights the valley degree of depth: be positioned at the mean depth of the prominent valley of the lower section of central part

The load length rate of Mr1 central part: the load of the intersection point of peak of prominence portion and the defiber of central part and load curve Length rate

The load length rate of Mr2 central part: the load of the intersection point of prominent valley and the defiber of central part and load curve Length rate.During it addition, make roughness curve change because of abrasion, high virgin curve (equivalent straight line) changes therewith.Therefore, central part The change of level error Rk, prominent valley degree of depth Rvk also changes.

As shown in Figure 6, above-mentioned " reference value of coefficientoffrictionμ " η v/F(η: viscosity, v: sliding speed, F: lotus is taken at transverse axis Weight), when the longitudinal axis takes coefficientoffrictionμ, along with η v/F becomes big, to boundary lubrication region → mixed lubrication region → fluid lubrication district Territory transition.Now, it is set as meeting the value of the coefficientoffrictionμ of moment of torsion transmission function, i.e. from the boundary lubrication that coefficientoffrictionμ is high The value of mixed lubrication areas adjacent low for engaging friction coefficient μ in region.

The meaning of above-mentioned " slip boundary value " is illustrated.In chain-type continuously variable transmission CVT, will be from electromotor etc. The input torque in driving source transmits to output pulley via metallic bond from input pulley.Therefore, transmitting to input and output pulley When moment of torsion passes, as produced the reduction of the coefficientoffrictionμ between metallic bond (pin end face)-pulley (pulley face), then can cause metal Chain or the idle running of input pulley, produce and cause exporting the dysfunction that moment of torsion reduces.Therefore, by as suppression transmission moment of torsion merit Can be managed by the value of bad generation and the reference value that sets coefficientoffrictionμ time moment of torsion is transmitted, using this reference value as Slip boundary value.It addition, in actual management, such as there is the allowed band of reference value ± 10% degree.

(contact area parameter (Rsm/Delq)/RzDIN)

As above-mentioned " suppression wear coefficient ", use the contact area parameter that the protuberance area to protuberance 42 is evaluated, It is set to this contact area parameter enter roughness curve key element average length Rsm divided by the numerical value obtained after angle of groove inclination Delq One step obtains (Rsm/Delq)/RzDIN divided by maximum height roughness RzDIN.

And, as it is shown in fig. 7, can produce when the initial value of " contact area parameter (Rsm/Delq)/RzDIN " is less than 0.94 Raw burn is tied, so the sintering boundary value of pulley surface roughness shape is set to 0.94.Here, as it is shown in fig. 7, exist such as ShiShimonoseki System, the initial value of contact area parameter (Rsm/Delq)/RzDIN is the least, the variable quantity that the abrasion of oil groove area parameters Rvk causes △ Rvk the biggest (protuberance area is little)；The initial value of contact area parameter (Rsm/Delq)/RzDIN is the biggest (protuberance area is big), oil The variable quantity △ Rvk that the abrasion of groove area parameter Rvk causes is the least.

As shown in Figure 8, above-mentioned " roughness curve key element average length Rsm " is by the roughness curve in datum length lr In the numerical value that is averaged of the length of the concavo-convex generation of a periodic quantity that comprises, by Rsm=(1/m) formula of Σ xsi counts Calculate.

As it is shown in figure 9, above-mentioned " angle of groove inclination Delq " refers to that the secondary of the roughness curve of Tilt Datum Plane length lr is mean square Root tilts, and passes throughFormula calculate.

As shown in Figure 10, above-mentioned " maximum height roughness RzDIN " is by datum length lr integral multiple (such as 5 times) In evaluation length ln, obtain meansigma methods during maximum height Zi of each datum length lr, pass through RzDIN=(1/n) formula of Σ zi Son calculates.It addition, the maximum of maximum height Zi is Rmax DIN.

The meaning of above-mentioned " sintering boundary value " is illustrated.Oil film will be produced because lubricants capacity is not enough to come off (without profit Lubricating oil), produce the phenomenon combined between metal and be generically and collectively referred to as sintering (set), in the phenomenon that the sliding parts such as bearing produce.In chain type In buncher CVT, between metallic bond (pin end face)-pulley (pulley face), produce same phenomenon.There is this sintering trace Time, obstruction can be become when sliding, become the producing cause of the dysfunction of the damage causing metallic bond.Therefore, have passed through The resistance to of initial wear confirms that it sinters trace long afterwards, and using the value of the generation boundary becoming sintering trace as sintering boundary value.

(setting of establishing scope based on parameter)

As it has been described above, for the part requirements function meeting chain-type continuously variable transmission CVT, as shown in the hacures of Figure 11, Need to be set in the pulley surface roughness shape of head pulley 1 and the radial section of auxiliary pulley 2 value of oil groove area parameters Rvk Value for the condition of value (value of more than 0.33) more than slip boundary, contact area parameter (Rsm/Delq)/RzDIN is sintering In the range of the condition of value (value of more than 0.94) more than boundary is all set up.

Now, meet the part requirements function of chain-type continuously variable transmission CVT and consider pulley surface when part uses Abrasion time, as initial range, need to be set in the oil groove area parameters Rvk >=scope of slip boundary value 0.33, contact surface The long-pending scope of parameter (Rsm/Delq)/RzDIN >=sintering boundary value 0.94, (Rsm/Delq)/RzDIN >=(-Rvk+ 1.2149) coextensive that/0.676 the two parameter Rvk, the relation extents of (Rsm/Delq)/RzDIN are all set up be (Figure 12's Hatched area).Here, employ two parameter Rvk, (the Rsm/Delq)/RzDIN >=(-Rvk+ of (Rsm/Delq)/RzDIN 1.2149) condition of/0.676, by the characteristic of the variable quantity △ Rvk that the abrasion of oil groove area parameters Rvk of expression Fig. 7 causes Y=-0.0676x+0.9199 derive, even if become exist abrasion also ensure that more than reference value coefficient of friction (Rvk >= 0.33) condition.

That is, as shown in the arrow of Figure 12, it is contemplated that even if the initial range of abrasion is set as making mill because of the use of part Damage development, also without departing from part function establishing scope.Though it addition, pulley surface wear use the initial stage as initial wear Be in progress rapidly, but have passed through initial wear resistance to long afterwards, when suppression abrasion progress transition.

Then, even if the initial hardness needed for surface roughness more than slip boundary to be guaranteed is carried out Explanation.

As shown in figure 13, pulley surface initial hardness is set as 815HV(HV: Vickers hardness) more than.This is because, such as figure Shown in 12, as resistance to oil groove area parameters Rvk long afterwards, slip boundary value needs to be more than 0.33.And, in order to ensure pulley Pulley face 11 to contacting with pin end face 32a, 32b of metallic bond 3 of surface initial hardness, head pulley 1 and auxiliary pulley 2,12,21, 22 implement based on carburizing and quenching and the heat treatment of tempering and bead.

(the processed operation of chain-type continuously variable transmission pulley)

Figure 14 is the operation block diagram of chain-type continuously variable transmission pulley, and Figure 15 is represent thin-film grinding processed basic Explanatory diagram, Figure 16 is to represent thin-film grinding granular size in each operation, vibration, thin film conveying, the activity list figure of the speed of mainshaft. Hereinafter, based on Figure 14～Figure 16, the processed operation of chain-type continuously variable transmission pulley is illustrated.It addition, following In the explanation of processed operation, in four pulley faces 11,12,21,22, illustrate with pulley face 12 for typical example.

As shown in figure 14, chain-type continuously variable transmission pulley passes through heat treatment step 4(CQT:car burizing The abbreviation of quenching and tempering) → finish turning processed operation 5 → grinding processed operation 6 → micro-penetrates The work treatment process such flow process of 7 → thin-film grinding processed operation 8 and manufacture.

Above-mentioned heat treatment step 4 is for implementing to make at the case-hardened Surface hardened layer in pulley face 12 by carburizing and quenching tempering The operation of reason.

Above-mentioned finish turning processed operation 5 is to implement the surface in pulley face 12 is carried out rough machined turnery processing process Operation.

Above-mentioned grinding processed operation 6 is to implement, by formed grinding wheel, the surface in pulley face 12 is carried out grinding of polish Cut the operation of processed.

Above-mentioned micro-processed operation 7 of penetrating is for implementing by giving the process of case hardness to pulley face 12 spraying microparticles Operation.Injection is processed by the Abrasive Particle Size of change injection, expulsion pressure, injecting time, jet length etc. and changes hardness And roughness.Here, as case hardness, in order to obtain the requirement hardness that requirement is more than 815HV, do not carry out common injection Processing, but the microgranule that injection particle diameter is little.This micro-processed of penetrating, particle diameter is little, correspondingly, and face pressure height, easily produce hardness, but On the other hand, surface roughness can produce inequality.

As shown in figure 15, above-mentioned thin-film grinding processed operation 8 is the mill by the grinding film 9 by being attached with abrasive particle Grain 9a presses on the milled processed in pulley face 12, to numerous concentric groove to construct as disc groove in appearance Operation.As shown in figure 16, this thin-film grinding processed operation 8 has " the first operation ", " the first operation-2 ", " the second work Sequence ", " the 3rd operation ".

Here, in " the first operation ", thin-film grinding granular size is coarseness, has vibration, there is thin film conveying, main shaft Rotating speed is constant rotational speed.In " the first operation-2 ", thin-film grinding granular size is coarseness, has vibration, defeated without thin film Sending, the speed of mainshaft is constant rotational speed.In " the second operation ", thin-film grinding granular size is coarseness, and dead-beat has thin film Conveying, the speed of mainshaft is constant rotational speed.In " the 3rd operation ", the thin film thinner than the abrasive particle of " the first operation " and " the second operation " Abrasive grains size is fine and closely woven granularity, has vibration, has thin film to carry, and the speed of mainshaft is high speed rotating speed.

It addition, " thin-film grinding granular size " refers to be attached to the size of the abrasive particle of grinding film." vibrate " refer to by by The grinding film of pressure is along the vibration diametrically reciprocated in pulley face." thin film conveying " refers to be rotated the grinding of pressing by roller Thin film is along the circumference transfer in pulley face." speed of mainshaft " refers to fixing by clamp for the pulley as processing object Pulley rotationally supports the rotating speed of main shaft.Hereinafter, each operation and thin-film grinding processed effect are illustrated.

(the first operation)

Above-mentioned first operation is to penetrate processed operation 7(pretreatment process pulley face 12 is implemented the micro-of case hardness) After, by the operation of the uneven planarizing of the pulley surface roughness of head pulley 1.

This first operation will be attached with the abrasive particle face of the first grinding film 91 of the abrasive particle that abrasive grains size is coarseness 91a presses on pulley face 12, makes the first grinding film 91 vibration carry out thin film conveying and construct.

That is, in the first operation, due to the mode with thin-film grinding granular size as coarseness make abrasive grains size with 3rd operation compares increase, so the grinding area of unit abrasive grains can be made to increase, increases the removal amount on surface.And, Owing to there being vibration, so abrasive particle moving back and forth the most at high speed in pulley face 12, the contact of pulley surface is disperseed by abrasive particle, Homogeneous surface can be obtained.It is additionally, since and there is thin film conveying, so pulley surface always can be to confer to new grinding Face, processing resistance increases, and grinding improves, it is possible to stably grinding.It is additionally, since the mode with the speed of mainshaft as constant rotational speed Making the speed of mainshaft slower than the 3rd operation, so the coefficient of kinetic friction increases, processing resistance increases, and it is possible to increase the removing on surface Amount.

Above-mentioned first operation-2 for carrying out vibration while carrying out film conveying and constructing by the first grinding film 91 The terminal stage of the first operation, the thin film stopping the first grinding film 91 is conveyed into the operation of no-spark grinding.

That is, the first operation-2 is owing to carrying without thin film, so produce the blocking of abrasive particle at the first grinding film 91, and processing Resistance reduces, and grinding is deteriorated.But, if entering no-spark grinding in the terminal stage short time of the first operation and making grinding amount Reduce, then by the only uneven big part of grinding, suppress the grinding of the uneven part diminished, there is reduction rough surface The uneven effect of degree.

(the second operation)

Above-mentioned second operation is so that the surface roughness that is evaluated the degree of depth degree of the groove being formed at pulley surface Parameter becomes the operation that the mode of the desired value of regulation carries out constructing.Specifically, in the parameter as pulley surface roughness One of oil groove area parameters Rvk >=slip boundary value 0.33 in the range of construct.

This second operation forbids the vibration of the first grinding film 91, and the abrasive particle face of the first grinding film 91 is pressed on pulley Face 12, carries out thin film conveying to the first grinding film 91 and carries out groove construction on pulley face.

That is, in the second operation, due to the mode with thin-film grinding granular size as coarseness make abrasive grains size with 3rd operation compares increase, so the grinding area of unit abrasive grains becomes big, it is possible to form deeper concavo-convex (groove) on surface. Being additionally, since and prohibit vibration, so abrasive particle being fixed the contact in pulley face, processing resistance increases, it is possible at pulley surface Form deeper concavo-convex (groove).Further, since there is thin film conveying, so pulley surface always can be to confer to new grinding Face, processing resistance increases, and grinding improves.And, the mode with the speed of mainshaft as constant rotational speed makes the speed of mainshaft and the 3rd work Sequence is compared slack-off, so by making the coefficient of kinetic friction increase, processing resistance increases, it is possible to formed deeper concavo-convex at pulley surface (groove).

(the 3rd operation)

Above-mentioned 3rd operation is the rough surface will be evaluated the concavo-convex planarization formed at pulley surface The mode of the desired value that degree parameter becomes regulation carries out the operation constructed.Specifically, using the ginseng as pulley surface roughness The mode of another contact area parameter (Rsm/Delq)/RzDIN >=sintering boundary value 0.94 of number is constructed.

3rd operation is thin by being attached with the abrasive particle (abrasive grains size is coarseness) than the first operation and the second operation The abrasive particle face 92a of the second grinding film 92 of abrasive particle (abrasive grains size is fine and closely woven granularity) press on pulley face 12, make Two grinding films 92 vibrate while carrying out thin film conveying, and pulley surface is carried out tabular surface construction.

That is, in the 3rd operation, due to make in the way of being fine and closely woven granularity by thin-film grinding granular size abrasive grains size with First operation compares reduction with the second operation, so the grinding area of unit abrasive grains can be made to diminish, it is possible to reduce surface Removal amount, and surface roughness can be made good.It is additionally, since and there is vibration, so abrasive particle is in the radial direction in pulley face 12 On move back and forth at high speed, the contact of pulley surface is disperseed by abrasive particle, it is possible to obtain homogeneous surface.Further, since have thin Film carries, so pulley surface can always be to confer to new grinding face, processing resistance increases, and grinding improves, it is possible to stable Ground carries out grinding.Be additionally, since with the speed of mainshaft be high speed rotating speed mode make the speed of mainshaft than the first operation and the second operation Height, so the coefficient of kinetic friction reduces, processes drag reduction.Therefore, by the synergism with fine grit, it is possible to carry out fine Processing, it is possible to form smooth face equably in the protuberance front end of pulley surface.

(thin-film grinding processed effect)

As it has been described above, in thin-film grinding processed operation 8, in the first operation, the pulley in pretreatment process Being flattened of inequality (stabilisation) of pulley surface roughness.In ensuing second operation, to guarantee desired friction system The mode of number μ forms the groove for oil storage.In ensuing 3rd operation, in the way of guaranteeing mar proof, form pulley Pulley surface.

That is, use and following constitute, thin-film grinding processed operation 8 is divided into, have the of uneven planarizing function One operation, have based on groove processing coefficient of friction management function the second operation, there is mar proof based on smooth processing 3rd operation of management function.Therefore, by the first operation by the uneven planarizing of roughness, the second operation then constructed Entering in establishing scope with the surface roughness management parameters in the 3rd operation, yield rate improves.And, by the second operation and 3rd operation, coefficient of friction and mar proof separate respectively and precision manages well.

The surface roughness management in the pulley face pulley product to being extracted from mass-produced pulley product by sampling The profile of pulley face surface roughness be measured, if measured value is in suitable scope, the most do not change operation specification, continue into Row thin-film grinding processed.On the other hand, if measured value deviation proper range, it is oil groove area parameters Rvk at offset direction In the case of, adjust the second operation, in the case of offset direction is contact area parameter (Rsm/Delq)/RzDIN, adjust the Three operations, in the case of offset direction is both sides, adjust the second operation and the 3rd operation.As this adjustment amount, according to operation institute Take time, thin-film grinding granular size and speed of mainshaft etc. are carried out.

Its result, becomes the side of the profile guaranteeing coefficient of friction and mar proof with the profile of the surface roughness in pulley face Formula is stably processed.

(background technology)

First, the band of variable v-belt drive and the combination of pulley are illustrated.

In band side, the pulley contact faces at element is provided with flank of tooth groove, is formed for forming the flat of lubricating film in pulley side Smooth portion and for discharge oil groove portion.Thus, the oil discharge recess for guaranteeing moment of torsion transmission performance it is set with and for being formed The protuberance (with reference to No. 4323357 publication of (Japanese) patent) of oil film.

On the other hand, the chain of chain-type continuously variable transmission and the combination of pulley are illustrated.

The pin portion of chain side does not the most discharge and uses geosynclinal concave portion.In pulley side, landform as variable v-belt drive Become to have the par for forming lubricating film and for discharging the groove portion of oil.

Generally, chain-type continuously variable transmission is commercially for machine outside variator, motor scooter variator.Another Aspect, as vehicular transmission, due to strict etc. from conditions such as the input torque of prime mover side, moment of torsion variations, so passing through Chain multiple row increases moment of torsion transfer capacity.So, in the chain-type continuously variable transmission used as transmission for vehicle, turn round The contact site that square transfer capacity increases at pin with pulley room becomes high surface pressure, high temperature and obtains stablizing corresponding to moment of torsion variation Coefficient of kinetic friction aspect be main points.

Here, will be because of as coefficient of friction variation, according to the disclosedest prior art ((Japanese) patent the 4323357th Number publication) understand, viscosity that the formation at the skin covering of the surface due to the mutual roughness of contact surface and lubricating oil brings and make formation Moment of torsion transport membranes and fine groove suitably discharge generation when the effect of remaining lubricating oil can not be carried out swimmingly.

But, as it has been described above, because of chain and the difference of band, it is impossible to variable v-belt drive pulley is useful as chain type without Level speed change pulley uses.This is because variable v-belt drive pulley is made as chain-type continuously variable transmission pulley Used time, lubricating oil discharge function is deteriorated.Accordingly, as fault mode, if by utilizing remaining oil between pulley face and pin end face Slip in heating and when softening, make because of abrasion the groove being formed at pulley face disappear, may be absorbed in because producing sintering Cause can not travel.

That is, as the problem of chain-type continuously variable transmission,

The pin end face of metallic bond is not provided with drain tank.Accordingly, it would be desirable to the discharge ability of the drain tank that replacement is not provided with It is located at pulley side.

Now, if owing to discharge ability is exceedingly located at pulley side, then it is difficult to carrying out the par shape of oil film formation Become oil, so must take into the upper limit of discharge ability.

Must take into the discharge energy through using the rheological parameters' change with time of coefficient of friction of pulley caused, surface abrasion to cause The reduction of power.

Must take into and the input torque promoting surface abrasion is increased the hard of the fine groove that suppresses and mar proof Degree, needs to ensure hardness.

As it has been described above, the application proposes have, applicable and newly generated solve along with to chain-type continuously variable transmission While problem, the lubricating oil discharge function shared by the element of variable v-belt drive moves to pulley side, only in pulley side The strict pulley surface roughness management technique required when undertaking lubricating oil discharge function and suppression both abrasion functions.

(the setting effect of management parameters)

As it has been described above, when pulley side undertakes lubricating oil discharge function and suppression abrasion function, corresponding to the cunning of each function The setting of the management parameters of wheel surface roughness shape becomes important.Hereinafter, its setting of management parameters of reflection is acted on into Row explanation.

Form parameter as the oil film that prevents undertaking above-mentioned lubricating oil discharge function, employ the oil groove area to oil groove 41 Oil groove area parameters Rvk(=being evaluated highlights the valley degree of depth).

Time i.e., as it is shown on figure 3, oil groove area becomes big with oil groove area, oil groove area of section S becomes big mode, become as Under relation, i.e.

Oil groove area ∝ S ∝ highlights valley area A2 ... (1).

And, as shown in Figure 5, there is following relation in prominent valley area A2, i.e.

A2 ∝ Rvk ... (2).

Therefore, by (1), (2) formula, oil groove area of section S becomes following relation, i.e.

Oil groove area ∝ Rvk ... (3).

As it has been described above, the oil groove area parameters being evaluated the oil groove area of oil groove 41 can be set as oil by (3) formula Groove area parameter Rvk.

As undertaking the suppression wear coefficient of above-mentioned suppression abrasion function, use roughness curve key element average length Rsm divided by the value obtained after angle of groove inclination Delq further divided by maximum height roughness RzDIN, and the protuberance to protuberance 42 Contact area parameter (Rsm/Delq)/RzDIN that area is evaluated.

That is, as it is shown on figure 3, protuberance area becomes big with protuberance area, then lobe length 1 becomes big mode, constitutes following Relation, i.e.

Protuberance area ∝ 1 ... (4).

A ideal form that () protuberance area is big is the rectangle of length L between lobe length I=groove.That is, at roughness curve In the case of key element average length Rsm is certain, as it is shown on figure 3, the least with groove angle θ (≈ angle of groove inclination Delq), lobe length I is more Big mode, constitutes following relation, i.e.

1 ∝ Rsm/Delq ... (5).

(b) in the case of Rsm, Delq are same shape, as it is shown on figure 3, with peak heights t(∝ RzDIN) the least, protuberance The mode that length I is the biggest, constitutes following relation, i.e.

L ∝ 1/RzDlN ... (6).

Therefore, by (4), (5), (6) formula, protuberance area becomes following relation, i.e.

Protuberance area ∝ (Rsm/Delq)/RzDIN ... (7).

As it has been described above, the contact area parameter being evaluated the protuberance area of protuberance 42 can be set as connecing by (7) formula Touch area parameters (Rsm/Delq)/RzDIN.

(pulley surface roughness shape management role)

When the pulley surface roughness shape of head pulley 1 and auxiliary pulley 2 is managed, need to be set as meeting simultaneously Prevent oil film from being formed and the roughness shape of suppression abrasion the two part requirements function.Hereinafter, to its pulley surface of reflection Roughness shape management role illustrates.

In order to meet the part requirements function of chain-type continuously variable transmission CVT, as shown in the hacures of Figure 11, head pulley 1 He It is more than slip boundary that the pulley surface roughness shape of the radial section of auxiliary pulley 2 is set in the value of oil groove area parameters Rvk The condition of value (value of more than 0.33) and the value of contact area parameter (Rsm/Delq)/RzDIN be sintering boundary more than value The scope that the condition of (value of more than 0.94) is all set up.

Here, oil groove area parameters Rvk used as the management parameters of pulley surface roughness shape is with from oil groove The lubricating oil discharge function of 41 is the highest, more unfertile land suppression lubricating oil film, and is able to ensure that the mode of coefficientoffrictionμ, becomes work The oil film that prevents for part requirements function forms the opinion scale of function.

On the other hand, the contact area parameter (Rsm/ used as the management parameters of pulley surface roughness shape Abrasion with protuberance area the biggest (smooth), is then suppressed the least by Delq)/RzDIN, and be prevented between metal combine cause The mode of sintering (set), become the opinion scale of the suppression abrasion function as part requirements function.

So, when the pulley surface roughness shape of head pulley 1 and auxiliary pulley 2 is managed, had in mind by use In oil groove area parameters Rvk and contact area parameter (the Rsm/Delq)/RzDIN the two management parameters of part requirements function, Can be set as realizing alleviating and meet simultaneously and preventing oil film from being formed and suppression abrasion the two part requirements merit of administrative burden The roughness shape of energy.

And, the pulley surface when meeting the part requirements function of chain-type continuously variable transmission CVT and considering part use Abrasion time, as shown in the hatched area of Figure 12, the initial roughness shape of pulley surface is set in Rvk >=slip boundary value The scope of 0.33, the scope of (Rsm/Delq)/RzDIN >=sintering boundary value 0.94, (Rsm/Delq)/RzDIN >=(-Rvk+ 1.2149) coextensive that/0.676 such two parameter Rvk, the relation extents of (Rsm/Delq)/RzDIN are all set up.

In this case, as shown in Figure 6, be present in the target zone in boundary lubrication region by initial oil film thickness in the way of It is managed.Afterwards, even if make abrasion develop because of use, the most as illustrated in fig. 6, can ensure that (the friction of part performance to be in The reference value of coefficient μ) oil film thickness in the range of mode be managed.

Even if therefore, it is possible to be set as making abrasion develop because of use by the initial roughness shape of pulley surface, also can Enough satisfied roughness shapes preventing oil film formation and suppression abrasion the two part requirements function simultaneously.

Then, as shown in figure 13, pulley surface initial hardness is set as 815HV(HV: Vickers hardness) more than.Guaranteeing this During pulley surface initial hardness, pulley face 11 to contacting with pin end face 32a, 32b of metallic bond 3 of head pulley 1 and auxiliary pulley 2, 12,21,22 implement based on carburizing and quenching and the heat treatment of tempering and bead.

Accordingly, as pulley surface initial hardness, by being set as meeting the condition of resistance to oil groove area parameters Rvk long afterwards Initial hardness, even if can also ensure that the surface roughness of more than slip boundary after endurance.

Then, effect is illustrated.

Following effect can be obtained in the chain-type continuously variable transmission pulley of embodiment 1.

(1) on the pulley face 21,22 of the pulley face 11,12 of input pulley (head pulley 1) and output pulley (auxiliary pulley 2) Set up in the chain-type continuously variable transmission CVT that metallic bond 3 carries out speed change,

In the pulley face 11,12 of above-mentioned input pulley (head pulley 1) and the pulley face of above-mentioned output pulley (auxiliary pulley 2) 21, be alternatively formed to concentric annular on 22 the oil groove 41 that lubricating oil is discharged along pulley circumference and with link above-mentioned metallic bond 3 The protuberance 42 of pin end face 32a, 32b contact of the pin 32,32 of carrier bar 31,

As the management parameters of pulley surface roughness shape based on above-mentioned oil groove 41 and raised part 42, use logical Cross from above-mentioned oil groove 41 removal of lubricant to the function preventing oil film from being formed be evaluated prevent oil film formed parameter and to The suppression wear coefficient that the suppression abrasion function of the raised part 42 of above-mentioned pin end face 32a, 32b contact is evaluated,

By thick for the pulley surface of above-mentioned input pulley (head pulley 1) and the radial section of above-mentioned output pulley (auxiliary pulley 2) Rugosity shape is set in the above-mentioned evaluation of estimate preventing oil film from forming parameter and weares and teares less than condition and the above-mentioned suppression of slip boundary The evaluation of estimate of parameter is not less than the scope that the condition of sintering boundary is all set up.

Therefore, the pulley surface roughness shape inputting pulley (head pulley 1) and output pulley (auxiliary pulley 2) is being carried out During management, it is possible to be set as alleviating realize administrative burden and simultaneously meet prevent oil film formed and suppression abrasion the two part Require the roughness shape of function.

(2) prevent oil film from forming parameter as above-mentioned, use the oil groove that the oil groove area to above-mentioned oil groove 41 is evaluated Area parameters,

As above-mentioned suppression wear coefficient, use the contact area ginseng that the protuberance area to raised part 42 is evaluated Number,

By thick for the pulley surface of above-mentioned input pulley (head pulley 1) and the radial section of above-mentioned output pulley (auxiliary pulley 2) Rugosity shape is set in the condition of the value that value is more than slip boundary of above-mentioned oil groove area parameters and above-mentioned contact area parameter The scope all set up of the condition of value that value is more than sintering boundary.

Therefore, on the basis of the effect of (1), by the oil groove area using the oil groove area to oil groove 41 to be evaluated The contact area parameter that parameter and the protuberance area to protuberance 42 are evaluated, it is possible to be by the management of pulley surface roughness shape Meet simultaneously and prevent oil film from being formed and the roughness shape of suppression abrasion the two part requirements function.

(3) in the roughness curve of evaluation length ln of the integral multiple of datum length lr, will be located in below central part The mean depth of prominent valley i.e. highlights the valley degree of depth and is set to Rvk, the one of the roughness curve being included in datum length lr The roughness curve key element average length that the length of the concavo-convex generation of periodic quantity is averaged is set to Rsm, will be based on datum length The angle of groove inclination that the secondary root-mean-square of the roughness curve of lr tilts is set to Delq, by the evaluation length of integral multiple datum length lr In ln, when the meansigma methods 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 above-mentioned prominent valley degree of depth Rvk,

It is set as above-mentioned contact area parameter tilting above-mentioned roughness curve key element average length Rsm divided by above-mentioned groove Value obtained after the Delq of angle obtain divided by above-mentioned maximum height roughness RzDIN further (Rsm/Delq)/ RzDIN,

The value that above-mentioned pulley surface roughness shape is set in above-mentioned oil groove area parameters Rvk is slip boundary value 0.33 The above value preventing oil film formation condition and above-mentioned contact area parameter (Rsm/Delq)/RzDIN is sintering boundary value 0.94 The scope that above suppression abrasive conditions is all set up.

Therefore, on the basis of the effect of (2), as management parameters, by using the oil representing lubricating oil discharge function Groove area parameter Rvk, contact area parameter (the Rsm/Delq)/RzDIN of expression suppression abrasion function, it is possible to pulley surface is thick The management of rugosity shape is the shape simultaneously meeting two part requirements functions.

(4) the above-mentioned pulley surface initial roughness shape after considering the running-in wear of above-mentioned pulley surface is set in The scope of above-mentioned groove depth parameter Rvk >=slip boundary value 0.33, above-mentioned contact area parameter (Rsm/Delq)/RzDIN >=burning The knot scope of boundary value 0.94, (Rsm/Delq)/RzDIN >=(-Rvk+1.2149)/0.676 the two parameter Rvk, (Rsm/ The coextensive that the relation extents of Delq)/RzDIN is all set up.

Therefore, on the basis of the effect of (3), whether cause the abrasion of pulley surface because of use, can be by The management of pulley surface initial roughness shape is the shape simultaneously meeting two part requirements functions.

(5) above-mentioned input pulley (head pulley 1) and above-mentioned output pulley (auxiliary pulley 2) by above-mentioned metallic bond 3 The pulley face 11,12,21,22 of pin end face 32a, 32b contact is implemented based on carburizing and quenching and the heat treatment of tempering and bead, Pulley surface initial hardness is set as 815HV(HV: Vickers hardness) more than.

Therefore, on the basis of the effect of (1)～(4), by the setting of pulley surface initial hardness, suppression pulley uses The abrasion development of the pulley surface caused, thus, even if can also ensure that the surface roughness of more than slip boundary after endurance.

(6) above-mentioned input pulley (head pulley 1) and above-mentioned output pulley (auxiliary pulley 2) will be by being attached with the grinding of abrasive particle The abrasive particle face 9a of thin film 9 presses on grinding of the pulley face 11,12,21,22 that contacts of pin end face 32a, 32b with above-mentioned metallic bond 3 Mill processes, and forms above-mentioned oil groove 41 and raised part 42,

The abrasive particle face 91a of the first grinding film 91 is pressed on above-mentioned pulley face 11,12,21,22 by above-mentioned oil groove 41, the most right Above-mentioned first grinding film 91 carries out thin film conveying and constructs,

Raised part 42 will be attached with the second grinding film 92 of the abrasive particle thinner than the abrasive particle of above-mentioned first grinding film 91 Abrasive particle face 92a press on above-mentioned pulley face 11,12,21,22, make above-mentioned second grinding film 92 carry out vibration enter Row thin film carries and constructs.

Therefore, on the basis of the effect of (1)～(5), by the surface roughness guaranteeing coefficient of friction and mar proof Profile deformation be processed by the parameter management from pulley surface roughness shape be connected different thin-film grindings process into Row construction, thereby, it is possible to reliable and stably obtain desired pulley surface roughness shape.

Above, based on embodiment 1, the chain-type continuously variable transmission pulley of the present invention is illustrated, but concrete composition It is not limited to this embodiment 1, without departing from claim claimed invention objective, then allows the change of design and add.

In embodiment 1, as preventing oil film from forming parameter, the example using oil groove area parameters Rvk is illustrated.But, Parameter is formed, as long as the function by preventing oil film from being formed from oil groove removal of lubricant to be evaluated as preventing oil film Parameter, then can also be for using the parameter (such as, oil groove area of section etc.) beyond oil groove area parameters Rvk.

In embodiment 1, as suppression wear coefficient, illustrate and use contact area parameter (Rsm/Delq)/RzDIN's Example.But, as suppression wear coefficient, as long as the suppression with the protuberance of pin end contact is worn and torn what function was evaluated Parameter, then can also be for using the parameter (such as, flat area rate etc.) beyond contact area parameter (Rsm/Delq)/RzDIN.

Claims (6)

1. a chain-type continuously variable transmission pulley, this chain-type continuously variable transmission is in the pulley face of input pulley and exports pulley Setting up metallic bond on pulley face and carry out speed change, described chain-type continuously variable transmission pulley is characterised by,

On the pulley face of the pulley face of described input pulley and described output pulley, it is alternatively formed lubricating oil to concentric annular The oil groove discharged along pulley circumference and the protuberance selling end contact of the pin with the carrier bar linking described metallic bond,

As the management parameters of pulley surface roughness shape based on described oil groove and described protuberance, use described oil groove Oil groove area parameters that oil groove area is evaluated and the contact area parameter that the protuberance area to described protuberance is evaluated,

The pulley surface initial roughness shape of described input pulley and the radial section of described output pulley is set in based on The evaluation of estimate of described oil groove area parameters is less than the condition of slip boundary and evaluation of estimate based on described contact area parameter not Less than sintering boundary condition all set up in the range of,

The pulley surface roughness shape of described input pulley and the radial section of described output pulley is set in described oil groove The value that the value of area parameters is the condition of the value of more than slip boundary and the value of described contact area parameter is more than sintering boundary Condition all set up in the range of.

2. chain-type continuously variable transmission pulley as claimed in claim 1, it is characterised in that

In the roughness curve of the evaluation length of the integral multiple of datum length, will be located in putting down of the prominent valley below central part The equal degree of depth i.e. highlights the valley degree of depth and is set to Rvk, the concavo-convex product of a periodic quantity of the roughness curve being included in datum length Roughness curve key element average length after raw length is averaged is set to Rsm, by roughness curve based on datum length Secondary root-mean-square tilt angle of groove inclination be set to Delq, by the evaluation length at the integral multiple of datum length, each benchmark long When the meansigma methods of the maximum height of degree is set to maximum height roughness RzDIN,

Described oil groove area parameters is set to described prominent valley degree of depth Rvk,

Described contact area parameter is set to, by described roughness curve key element average length Rsm divided by described angle of groove inclination The value that the value obtained after Delq obtains divided by described maximum height roughness RzDIN again, i.e. (Rsm/Delq)/RzDIN,

The value that described pulley surface roughness shape is set in described oil groove area parameters Rvk is slip boundary value more than 0.33 Condition and the condition that the value of described contact area parameter (Rsm/Delq)/RzDIN is sintering boundary value more than 0.94 all set up In the range of.

3. chain-type continuously variable transmission pulley as claimed in claim 2, it is characterised in that

The described pulley surface initial roughness shape considering the abrasion of pulley surface is set in described oil groove area parameters The scope of Rvk >=slip boundary value 0.33, described contact area parameter (Rsm/Delq)/RzDIN >=sintering boundary value 0.94 Rvk in scope, (Rsm/Delq)/RzDIN >=(-Rvk+1.2149)/0.676, the relation extents of (Rsm/Delq)/RzDIN In the coextensive all set up.

4. the chain-type continuously variable transmission pulley as according to any one of claims 1 to 3, it is characterised in that

Described input pulley and described output pulley by sell with described metallic bond the pulley face enforcement of end contact based on Carburizing and quenching and the heat treatment of tempering and bead, be set as more than 815 Vickers hardnesses (HV) by pulley surface initial hardness.

5. the chain-type continuously variable transmission pulley as according to any one of claims 1 to 3, it is characterised in that

Described input pulley and described output pulley are by pressing on the abrasive particle face of the grinding film being attached with abrasive particle with described The milled processed in the pulley face of the pin end contact of metallic bond, forms described oil groove and described protuberance,

Described first grinding film, by being pressed towards described pulley face by the abrasive particle of the first grinding film, is only entered by described oil groove Row thin film carries and constructs and formed,

The abrasive particle of the described protuberance the second grinding film by the abrasive particle thinner than the abrasive particle of described first grinding film will be attached with Press towards described pulley face, make described second grinding film vibration carry out thin film conveying construction and be formed.

6. chain-type continuously variable transmission pulley as claimed in claim 4, it is characterised in that

Described input pulley and described output pulley are by pressing on the abrasive particle face of the grinding film being attached with abrasive particle with described The milled processed in the pulley face of the pin end contact of metallic bond, forms described oil groove and described protuberance,

Described first grinding film, by being pressed towards described pulley face by the abrasive particle of the first grinding film, is only entered by described oil groove Row thin film carries and constructs and formed,

The abrasive particle of the described protuberance the second grinding film by the abrasive particle thinner than the abrasive particle of described first grinding film will be attached with Press towards described pulley face, make described second grinding film vibration carry out thin film conveying construction and be formed.