KR20140111700A - Method for the production of a clutch friction lining - Google Patents

Method for the production of a clutch friction lining Download PDF

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Publication number
KR20140111700A
KR20140111700A KR1020147022180A KR20147022180A KR20140111700A KR 20140111700 A KR20140111700 A KR 20140111700A KR 1020147022180 A KR1020147022180 A KR 1020147022180A KR 20147022180 A KR20147022180 A KR 20147022180A KR 20140111700 A KR20140111700 A KR 20140111700A
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KR
South Korea
Prior art keywords
friction
support
clutch
friction lining
manufacturing
Prior art date
Application number
KR1020147022180A
Other languages
Korean (ko)
Inventor
로익 아담자크
장 피에르 부또
다니엘 디주스
프레데릭 빌폰투
에릭 레잠텔
Original Assignee
발레오 마테리오 드 프릭시옹
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 발레오 마테리오 드 프릭시옹 filed Critical 발레오 마테리오 드 프릭시옹
Publication of KR20140111700A publication Critical patent/KR20140111700A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/60—Clutching elements
    • F16D13/64—Clutch-plates; Clutch-lamellae
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D2069/004—Profiled friction surfaces, e.g. grooves, dimples
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D2069/0425—Attachment methods or devices
    • F16D2069/0433—Connecting elements not integral with the braking member, e.g. bolts, rivets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D2069/0425—Attachment methods or devices
    • F16D2069/045—Bonding
    • F16D2069/0466—Bonding chemical, e.g. using adhesives, vulcanising
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D2069/0425—Attachment methods or devices
    • F16D2069/0491—Tools, machines, processes

Abstract

The present invention relates to a method of manufacturing a clutch friction lining (4), comprising the steps of: producing a friction body (6) comprising at least one opening (10) opened only in a first surface (7) of a friction body (6); Securing the friction body (6) to the support body (5) by attaching the first surface (7) of the friction body (6) to the support body (5); And machining the second surface 8 of the friction body 6 until the apertures 10 are opened at the second surface 8 of the friction body 6 opposite to the first surface 7 To a method of manufacturing a clutch friction lining.

Description

TECHNICAL FIELD [0001] The present invention relates to a clutch friction lining,

The present invention relates to a method of manufacturing a friction lining designed to be mounted on a friction disc of an automotive clutch, in particular a dual clutch.

The dual clutch can alternately connect the vehicle's engine shaft with the two coaxial input shafts of the gearbox, which can be of an automated type.

Therefore, the dual clutch can change the gear ratio while maintaining the transmission of the engine torque to the car wheels. Actually, two clutches are associated with the even and odd gear ratios, respectively. When the gear ratio is changed, the first clutch is disengaged and the second clutch is engaged so that the engine torque can be gradually transferred from the first clutch to the second clutch.

Each clutch includes a mechanism including a diaphragm designed to cooperate with an engine shaft and a pressure plate rotationally associated with the cover. Each diaphragm can be displaced by the corresponding clutch bearing between the rest position and the operating position. Depending on the type of clutch, the operating position of the diaphragm corresponds to the connection or disconnection of the engine shaft and gearbox shaft, and the diaphragm rest position corresponds to disengagement or connection of these shafts. Therefore, it means a normally open type clutch or a normally closed type clutch, respectively.

The clutch bearings are controlled by an actuator controlled by a computer to apply a predetermined force to the diaphragm to displace it by a given distance.

The pressure plate of each clutch driven by the diaphragm is designed to tighten a friction disc with a friction lining on a reaction plate connected to the engine shaft. One reaction plate may be provided for each clutch. In a variant, a unique reaction plate is used which is common to the two clutches provided between the two friction discs.

The friction lining is designed to contact the corresponding material of the pressure plate and reaction plate (s).

Each friction disc is rotatably connected to the input shaft of the gearbox and each reaction plate is rotationally coupled to an inertia flywheel connected to the engine shaft. Thus, by friction disk being tightened between the pressure plate and the reaction plate, power transmission between the engine shaft and the input shaft of the associated gearbox is possible.

The lining typically includes an annular friction body comprised of a fibrous material, a binder and a filler. The rubbing body is fixed on a support formed of an annular metal stopper, for example, by pressing or by adhesion.

The lining is fixed to each of the radial faces of the friction disk, and the corresponding material of the pressure plate and the reaction plate is supported on the friction body.

The lining is secured to the friction disc by a rivet received in the opening of the lining, and the head of the rivet is supported on a counterbore formed in the friction body or on a stopper.

Each rivet may serve to secure one or two linings to the friction disk. Where the rivets serve to secure one friction lining, the apertures located opposite the rivets must be provided in the other lining so that the rivet engagement tool can pass.

Hereinafter, it is noted that the head of the rivet is not supported by the counter bore provided in the friction member but supported by the stopper. This method is particularly useful in the case of a dual clutch in which the axial charge volume that can be used is limited since it can reduce the axial charge volume of the unit.

In this case, it is preferable that the stopper surface, which is positioned at the bottom of the hole and serves to support the head of the rivet, is not covered with a friction material.

Indeed, in the opposite case, the free thickness of the rivet varies with the rivet, resulting in horizontal defects of the friction lining and can cause a phenomenon called " rattling "during the rotation of the friction disk during operation or vibration.

It is known to place the stopper on the bottom of the fixed part of the mold and then to implement the friction lining by overmolding or by heating press by attaching a friction material consisting of fibers, binder and one or more fillers onto the stopper. This unit is then hot-pressed using a fluidized piston. During this operation, the friction material is polymerized to form a friction body attached to the stopper.

As indicated above, the rubbing body should include openings that can accommodate the head of the rivet or that can pass the tool of riveting. The stopper shall also include openings that serve to pass through the rivet body or through the riveting tool in accordance with the lining fixation scheme considered.

In the first embodiment, the opening of the rubbing body is realized by drilling using a drill or a phrase half. In this case, it is important to remove as much friction material as possible without damaging the stopper which serves to support the head of the rivet.

In the second embodiment, the apertures of the rubbers are formed directly during overmolding or hot pressing operations. In this case, the flow-type piston includes a protruding section designed to form the opening after the hot pressing.

In both cases, a frictional material generally remains at the bottom of the hole at the surface of the stopper designed to form a support for the head of the rivet.

To address this problem, document WO 2011/009427 suggests that this stopper zone is coated with an interfacial layer to reduce adhesion of the friction material.

The friction material remaining on the bottom of the hole can be removed by evaporation using a laser beam. The power of the laser beam determines that the stopper is not damaged by the generated heat. This process is relatively long and costly.

The present invention is particularly directed to providing a simple, efficient and economical solution to this problem.

To this end, the present invention provides a method of manufacturing a clutch friction lining,

- fabricating a friction body comprising at least one opening which is only opened at the first surface of the friction body,

Fixing the rubbing body to the support by attaching the first surface of the rubbing body to the support,

Machining the second surface of the friction body until the opening is open at the second surface of the friction body opposite to the first surface.

According to this method, after the manufacturing process, the rubbing body includes at least one opening which is fixed to the support and passes through the rubbing body. Thus, the lining does not include a friction material at the bottom of the hole at the corresponding side of the support designed to support the head of the rivet.

The opening formed in the support for passing the rivet body or the riveting tool can be realized later by, for example, drilling, punching or laser cutting. In a variant, the openings of the support can be implemented before fixing the friction body to the support. In this case, it is necessary to accurately position the support with respect to the rubbing body before fixing the rubbing body.

Of course, the present invention is not limited to the technical field of the dual clutch.

According to an aspect of the present invention, the rubbing body is manufactured in the form of an annular rubbing body fixed on the annular support body.

Advantageously, the rubbing body is produced by press molding in a mold comprising a fixed section comprising a first indentation and a flow-type piston comprising a second indentation, at least one of the indentations being capable of forming an opening As shown in Fig.

For example, the internal temperature of the mold during compression processing may be from 150 캜 to 250 캜, preferably from 180 캜 to 200 캜. Further, the internal pressure of the mold can gradually increase with time, and this pressure can be up to 200 bar to 300 bar.

The friction body may comprise at least one fibrous material, at least one binder and at least one filler.

In this case, the formation of the rubbing body can be carried out by heating, so that the binder is at least partially polymerized.

The rubbing body should have sufficient durability so that it can be fixed to the support after press forming.

For example, the polymerization rate after completion of such a molding operation may be about 50% to 90%, preferably about 70%.

Further, after the formation of the rubbing body, after the support is attached to the first surface of the rubbing body, the support body is heat-pressed to the rubbing body until the binder is completely polymerized and the rubbing body is attached to the support .

For example, the temperature during this step may be from 150 ° C to 250 ° C, preferably from 180 ° C to 200 ° C. The pressure applied to the support can be from 200 bar to 300 bar.

In a variant, the friction body is fixed to the support by adhesion.

In this case, the rubbing body can be adhered to the support by an adhesive containing phenolic resin as a main component.

In order to improve the adhesion between the friction body and the support, the surface of the support designed to fix the friction body is made by shot blasting or by chemical etching, and / or coated with a bonding primer.

Preferably, the second surface of the rubbing body is machined by grinding until the opening is open at the second surface of the rubbing body.

Coating of the entire second face of the friction body can be carried out easily, quickly, and at low cost.

In particular, when the friction body comprises a plurality of apertures, all of the apertures can be opened at one time on the friction surface in one coating step.

Finally, after machining of the second surface of the rubbing body, substantial particles present in the pores can be removed, for example, by suction.

The present invention also relates to a clutch friction lining comprising a friction body designed to be mounted on a support, wherein the friction body comprises at least one groove in which the material is removed at the bottom of the groove, .

The grooves can be obtained by the above-described manufacturing method.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood and other features and advantages of the invention will be apparent from the following detailed description, taken in a non-limiting embodiment with reference to the appended drawings.

1 is an exploded perspective view of a prior art friction disk.
Figures 2-7 are schematic diagrams showing the different manufacturing process steps of a friction lining according to the present invention.

Fig. 1 shows a hub 2 with a fluted flute extending along axis A, designed to be connected to the input shaft of a gearbox, a radially extending hub 2, 1 shows a prior art friction disc 1 comprising a wheel disc 3 connected to a hub. An annular friction lining (4) is provided on both sides of the wheel disk (3) in the radial direction.

Each friction lining 4 comprises a support formed by an annular stopper 5, i.e. a sheet of thin metallic material or composite sheet, generally 0.2 mm to 1 mm thick.

An annular friction member (6) is provided on the surface of the stopper (5) opposite to the wheel disc (3). These friction bodies 6 are typically composed of a fibrous material, a binder and a filler, as is known in particular from the applicant's publication FR 2 941 758.

Each of the friction bodies 6 includes a radial fixing surface 7 facing toward the corresponding stopper and a radial friction surface 8 opposite to the fixing surface 7.

The fixing surface 7 is attached to the corresponding stopper 5 and each of the stoppers 5 is fixed to the wheel disc 3 by a rivet 9.

The friction surface 8 is designed to transmit the torque of a drive member, such as the crankshaft of a combustion engine, to a driven member such as an input shaft of a gearbox in cooperation with a clutch mechanism, in particular a pressure plate of the dual clutch and a reaction plate .

As indicated above, apertures 10 are formed in the friction body and serve to accommodate the heads of the rivets.

The apertures 19 and 20 are further provided on the stopper 5 to pass through a rivet engagement tool, not shown, and to pass through the body of the rivet 9. The openings (19) have diameters smaller than the diameters of the openings (20).

The head of the rivet 9 is thus supported on the stopper 5 around the aperture 19 which serves to pass the body of the rivet 9 and the head is also provided with an opening 10 ).

Due to the reasons stated above, there is a need for a simple and less costly method of forming a friction (not shown) having apertures 10 completely through the rubbing body 6 on the stopper 5, (6). ≪ / RTI >

To this end, the present invention proposes the following method as shown in Figs. 2 to 7 by reference. These figures show only the B section of the annular lining 4 (Fig. 2).

The method comprises a first step of producing a friction body (6) comprising apertures (10) that are only open on the fastening surface (7) of the friction body (6).

More specifically, as shown in Fig. 1, the rubbing body 7 has an annular fixing portion 11 including a first indentation and a cylindrical projection 13 capable of forming the hole 10 at the time of molding. And a second indentation including an annular flow-type piston (12). As in the prior art, the friction body 6 comprises at least one fibrous material, at least one binder and at least one filler.

The shaping of the friction body 6 is carried out by heating so that the binder is at least partly polymerized.

The internal temperature of the mold during compression processing may be from 150 캜 to 250 캜, preferably from 180 캜 to 200 캜. Further, the internal pressure of the mold can gradually increase with time, and this pressure can be up to 200 bar to 300 bar. The polymerization rate after completion of the molding operation may be about 50% to 90%, preferably about 70%.

After removal of the fluidized piston 12 (Fig. 3), the method includes a second step of securing the friction body 6 on a support, in this case an annular stopper 5 of 0.2 mm to 1 mm thickness.

To this end, as shown in Fig. 4, the annular stopper 5 engages the stationary part 11 of the mold and rests on the fixing face 7 of the rubbing body 6. The piston 12 is replaced by an annular piston 14 having a substantially flat surface 15 facing the stopper 5. [

Thus, the stopper 5 is hot pressed on the friction body 6 by the piston 14 until the binder is completely polymerized and the friction body 6 is attached to the support 5.

In order to improve the adhesion, the surface of the stopper 5 designed to fix the rubbing body 6 can be produced by shot blasting or by chemical etching, and / or coated with the bonding primer before the heating press .

In a modification not shown, the friction member 6 is fixed to the stopper 5 by an adhesive containing phenolic resin as a main component.

After the removal of the friction lining 4 (Fig. 5) during molding, it is possible to apply a force to the fixing surface 7 until the opening 10 is opened in the friction surface 8 of the friction body 6 The friction surface 8 of the friction body 6 is machined by polishing (Fig. 6).

To this end, the metal stopper 5 is mounted on the metal table 16 to hold the friction lining 4 in position and the friction surface 8 of the friction body 6 is fastened to the machine Processing. The thickness of the material to be machined is 0.2 mm to 1 mm, preferably 0.3 mm to 0.5 mm. The thickness of the rubbing body 6 is 1.5 mm to 5 mm after polishing. Substantial particles of the friction material present in the apertures are subsequently removed, for example by suction.

The opening provided in the support for passing the rivet body or the rivet-engaging tool can be realized later by, for example, drilling, punching or laser cutting. In a variant, the openings of the support can be implemented before fixing the friction body to the support. In this case, it is necessary to accurately position the support relative to the rubbing body before fixing the rubbing body.

Claims (13)

A method of manufacturing a clutch friction lining,
- manufacturing a friction body (6) comprising at least one opening (10) opened only in the first surface (7) of the friction body (6)
- fixing the friction body (6) to the support (5) by attaching the first surface (7) of the friction body (6) to the support body (5)
- machining the second surface (8) of the friction body (6) until the opening (10) is opened at the second surface (8) of the friction body (6) opposite to the first surface ≪ RTI ID = 0.0 >
Clutch friction lining manufacturing method. The method according to claim 1,
Characterized in that the rubbing body is manufactured in the form of an annular rubbing body (6) fixed on the annular support (5)
Clutch friction lining manufacturing method. 3. The method according to claim 1 or 2,
The friction body (6) is manufactured by press molding in a mold comprising a fixed portion (11) comprising a first indentation and a flowable piston (12) comprising a second indentation, and at least one of the indentations And a protrusion (13) capable of forming an opening (10)
Clutch friction lining manufacturing method. The method of claim 3,
Characterized in that said friction body (6) comprises at least one fibrous material, at least one binder and at least one filler
Clutch friction lining manufacturing method. 5. The method of claim 4,
Characterized in that the shaping of the friction body (6) is carried out by heating so that the binder is at least partly polymerized
Clutch friction lining manufacturing method. 6. The method of claim 5,
After the formation of the friction body 6, after the support body 5 is attached to the first surface 7 of the friction body 6, the binder is completely polymerized and the friction body 6 contacts the support body Presses the support (5) to the friction member (6) until it is attached to the friction member (6)
Clutch friction lining manufacturing method. 7. The method according to any one of claims 1 to 6,
Characterized in that the friction body (6) is fixed to the support (5) by adhesion
Clutch friction lining manufacturing method. 8. The method of claim 7,
Characterized in that the friction body (6) is bonded to the support (5) by means of an adhesive containing phenolic resin as a main component
Clutch friction lining manufacturing method. 9. The method according to any one of claims 1 to 8,
Characterized in that the surface of the support (5) which is configured to fix the rubbing body (6) is produced by shot blasting or by chemical etching and / or is coated with a binding primer
Clutch friction lining manufacturing method. 10. The method according to any one of claims 1 to 9,
Characterized in that the second surface (8) of the rubbing body (6) is machined by a polishing (17) until the opening (10) is opened at the second surface (8) of the rubbing body doing
Clutch friction lining manufacturing method. 11. The method according to any one of claims 1 to 10,
Characterized in that after machining of the second surface (8) of the rubbing body (6), substantial particles present in the opening (10) are removed, for example by suction
Clutch friction lining manufacturing method. CLAIMS 1. A clutch friction lining (4) comprising a friction body configured to be mounted on a support (5), said friction body comprising: at least one groove (5) having material removed at the bottom of the groove (10)
Clutch friction lining. 13. The method of claim 12,
Characterized in that it is obtained by the process according to any one of claims 1 to 11
Clutch friction lining.
KR1020147022180A 2012-01-12 2013-01-10 Method for the production of a clutch friction lining KR20140111700A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1250318 2012-01-12
FR1250318A FR2985796B1 (en) 2012-01-12 2012-01-12 METHOD FOR PRODUCING A CLUTCH FRICTION TRIM
PCT/FR2013/050058 WO2013104869A1 (en) 2012-01-12 2013-01-10 Method for the production of a clutch friction lining

Publications (1)

Publication Number Publication Date
KR20140111700A true KR20140111700A (en) 2014-09-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020147022180A KR20140111700A (en) 2012-01-12 2013-01-10 Method for the production of a clutch friction lining

Country Status (6)

Country Link
JP (1) JP2015507150A (en)
KR (1) KR20140111700A (en)
CN (1) CN104185744A (en)
DE (1) DE112013000564T5 (en)
FR (1) FR2985796B1 (en)
WO (1) WO2013104869A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2017008103A (en) 2015-03-25 2017-09-18 Itt Italia Srl Automated finishing station for a brake pad.
WO2016151547A1 (en) * 2015-03-25 2016-09-29 Itt Italia S.R.L. Automated finishing station for a brake pad
DE102016219456A1 (en) * 2015-10-21 2017-04-27 Schaeffler Technologies AG & Co. KG Method for producing a disk set of a wet-operated friction clutch and friction clutch
CN109027033A (en) * 2018-08-09 2018-12-18 湖北久鸣汽车零部件有限公司 A kind of preparation method of clutch surface friction material

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Publication number Priority date Publication date Assignee Title
FR1304067A (en) * 1961-07-22 1962-09-21 Ferodo Sa Improvements made to discs or other friction members
US3300353A (en) * 1964-02-10 1967-01-24 Jack F Hernick Brake shoes
FR2549922B1 (en) * 1983-07-25 1985-11-15 Valeo FIXING A TRIM ON A FRICTION DISC, PARTICULARLY FOR A CLUTCH OF A MOTOR VEHICLE
JPS6237530A (en) * 1985-08-10 1987-02-18 Honda Motor Co Ltd Brake disc friction pad and manufacture thereof
JPS63132126U (en) * 1987-02-20 1988-08-30
US4878282A (en) * 1987-09-04 1989-11-07 Borg-Warner Automotive Gmbh Method for the production of friction plates, synchronizing blocker rings or similar structures
JPH0211938A (en) * 1988-06-28 1990-01-17 Hitachi Chem Co Ltd Manufacture of moved plate of clutch
JPH03272324A (en) * 1990-03-16 1991-12-04 Hitachi Chem Co Ltd Clutch driven plate and manufacture thereof
EP1910704B1 (en) * 2005-08-04 2012-01-25 BorgWarner, Inc. Friction plates and various methods of manufacture thereof
FR2941758B1 (en) 2009-01-30 2011-03-04 Valeo Materiaux De Friction Sas FRICTION TRIM, IN PARTICULAR FOR CLUTCH
DE112010003044B4 (en) * 2009-07-23 2021-09-30 Inno Friction Gmbh Process for the production of a friction lining and a friction lining

Also Published As

Publication number Publication date
JP2015507150A (en) 2015-03-05
CN104185744A (en) 2014-12-03
FR2985796A1 (en) 2013-07-19
DE112013000564T5 (en) 2014-11-20
WO2013104869A1 (en) 2013-07-18
FR2985796B1 (en) 2014-01-03

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