KR100329601B1 - Method for manufacturing friction surface and carrier assembly and apparatus - Google Patents

Abstract

The present invention relates to a friction surface adhered to both sides of the carrier plate 14 on the friction surfaces 20 and 22, and a method for manufacturing the carrier assembly 2 and a device thereof. The first friction surface 20 is first adhered to the carrier plate 14 and the second friction surface 22 is adhered to the semi-assembly by the adhesive device 58. The second surface 22 is disposed in the annular space 83 and the elastomeric adhesive 24 is developed in the form of beads on the exposed surface of the friction surface. The first friction surface and carrier plate assembly 12 are disposed on the support surface 84 adjacent the space and flattened to contact the adhesive 24. Hot air is supplied through the device to allow the adhesive 24 to cure.

Description

Method for manufacturing friction surface and carrier assembly and apparatus therefor

1 is a plan view showing a friction surface and a carrier assembly of a type to be produced;

2 is an enlarged cross-sectional view taken along the line II-II of FIG.

3 is a flow chart illustrating a method of manufacturing the friction surface and the carrier assembly of FIG.

4 is a cross-sectional view showing an adhesive jig used to make the carrier plate and the first friction surface adhered thereto conical during the first step of the manufacturing process;

5 is a cross-sectional view showing an adhesive device for bonding the second friction surface to the carrier plate by an elastomeric adhesive.

6 and 7 are a perspective view and a cross-sectional view showing a semi-assembly of the friction surface and the carrier plate.

The present invention relates to a method and apparatus for the production of a friction surface and a carrier assembly for a clutch drive plate.

In particular, the present invention describes a carrier assembly having a first array of friction material adhered to one side of the carrier plate with a relatively hard adhesive and a second array of friction material adhered to the other side of the carrier plate with a relatively elastic adhesive. A friction surface and a carrier assembly of the type described in the applicant's patent application W0-A-90 / 08908.

The carrier plate is made of spring steel and has a plurality of spokes projecting outwardly at intervals in the circumferential direction on the outer circumference to which the friction surface is attached. With this structure, the friction surface and the carrier are flexible in the peripheral direction. Problems arise during manufacturing due to the flexibility of the carrier plate and the different nature of the two bonds formed between the two friction surfaces and the carrier plate.

According to the invention, the friction surface is bonded to one side of the carrier plate which is relatively flexible with the first thermosetting adhesive on the first annular friction surface, and the second friction surface is bonded to the other side of the carrier plate with the second elastomeric adhesive. And a method of producing a carrier assembly, the method comprising the steps of adhering a first friction surface to a carrier plate by means of a first thermosetting adhesive, disposing a second friction surface in an annular space, and planarly placing the second friction surface in the space. Deploying the adhesive, applying the adhesive to the exposed surface of the friction surface so that the adhesive protrudes above the mold, placing the carrier plate adjacent the adhesive, and disposing the carrier and the first adhesive friction surface over the space so as to span the space Causing the first friction surface and the carrier plate to develop in a planar manner such that the carrier plate is pressed into contact with the adhesive and curing the second adhesive. All.

Preferably the first friction surface is adhered to the one side of the carrier plate for the required time at high temperature, and the first friction surface and the carrier plate are re-conical during the curing process for the construction of the carrier plate and the friction surface assembly bonded thereto. In the pressurized state in the form of a fixed in the holding device.

Also in accordance with the present invention, the carrier plate comprises a first friction surface bonded to one side of the carrier plate with a relatively rigid first adhesive and a second friction surface bonded to the other side of the carrier plate with a second elastomeric adhesive. There is provided an apparatus for manufacturing a friction surface and a carrier assembly, the apparatus comprising two parts, the first part having an annular space having a planar base formed therein so that the second friction surface can be inserted, The carrier plate is supported coaxially in this space, and the depth of the space is such that an elastomeric adhesive applied in the form of a friction surface bead can protrude above the support surface, and the second portion is the first friction surface and the carrier. The part of the carrier plate is held against the pressure plate having the planar portion which is developed in the plane to press the carrier plate against the exposed surface of the support surface and the first friction surface such that the carrier plate is in contact with the elastomeric adhesive. A fixed means for.

Preferably the device also includes an adhesive jig for assembling the first friction surface to the carrier plate such that the apparatus forms a first friction surface and a carrier assembly, wherein the adhesive jig is arranged with at least one first friction surface and the carrier assembly. And a stator having a lower back cone cone former on the base being formed and an upper back cone cone former that secures the assembly to the lower former under a predetermined pressure.

Referring to the present invention in more detail based on the accompanying drawings as follows.

In Figures 1 and 2 the friction surface and carrier assembly 2 constitute part of a friction clutch drive plate for use in a clutch, for example a diaphragm spring clutch for a motor vehicle.

The carrier assembly 2 consists of a flat steel carrier plate 4 in the form of a disk in which a through hole 6 into which an internal splined hob (not shown) is inserted when assembled to a drive plate is formed. In addition, the carrier plate is formed with an open portion 10 into which the torsion spring for vibration damping is inserted, and a through hole 8 into which a known stop rivet is inserted.

At the periphery the carrier plate 4 has a number of outwardly projecting spokes 14 formed integrally with the main body of the carrier plate. These spokes are in the form of planes arranged at equal intervals in the slots 16 about the central axis X on which the carrier assembly 2 rotates.

In the illustrated embodiment, there are 30 spokes 14 and slots 16 each. Each spoke is about the width of an arc of about 7 ° and the width of each slot is about 5 °. The number, size, shape and spacing of spokes can vary as needed.

The spokes 14 have a flexible elasticity, such as a leaf spring, so that they can be bent in a direction parallel to the axis X, that is, in the axial direction. Therefore, the carrier plate 4 is able to bend well in the part of the spoke 14.

Both sides of each spoke 14 are bonded coaxially with the first and second friction surfaces 20, 22. The first friction surface 20 is adhered to the spokes with an adhesive 23. The adhesive 23 is REDUX 80 (trade name) which is a thermosetting nitrile phenol resin adhesive. As well as other synthetic adhesives, various thermosetting phenolic resins may be used as the adhesive. The second friction surface 22 is bonded to the spokes 14 with an elastomeric adhesive layer 24 which is directly bonded to the second friction surface 22 and the spokes 14. In this embodiment, the spokes 14 are bonded to the elastomeric adhesive layer 24. In this embodiment, the elastomeric adhesive layer is a silicone rubber disposed in the form of beads 24A-24C between the second friction surface 22 and the spokes 14. The silicone is cured upon heating in a humid atmosphere to form a second friction It is a room temperature vulcanizing (RTV) material that allows adhesive adhesion between the face 22 and the spokes. In addition, by applying such heat, there is an effect that the adhesive 23 made of a thermosetting phenol resin can be cured.

The rubber is arranged in the form of closed yeast on the friction surface.

The adhesive layer 24 of the elastomer has a suitable thickness such that it can act as an elastomer that can allow movement of the second friction surface 22 in the axial direction with respect to the spokes 14. On the other hand, the adhesive 23 is relatively or hardly elastic and there is no elastic cushion of the first friction surface 20 relative to the spokes 14.

Each of the first and second friction surfaces 20, 22 may be composed of other suitable friction materials and may be in the form of non-asbestos.

The method of manufacturing the friction surface and the carrier assembly 2 is described in FIG. 3. The first and second friction surfaces 20 and 22 are sent to the cleaning device 50 for cleaning and removing contaminants. The first friction surface 20 is then sent to the adhesive applicator 51 where an adhesive (Redux adhesive) is applied to one side of the first friction surface 20.

At the same time, the carrier plate 4 passes through the degreasing machine 52 and is sent to the adhesive applicator 51. The first friction surface 20 and the carrier plate 4 to which the adhesive is applied are sent to the drying area 53 to remove the adhesive solvent. The solvent can be removed at high temperature and can also be removed by standing at room temperature for 24 hours. The first friction surface 20 may be sent back to the adhesive applicator 51 so that the second adhesive layer is applied.

The first friction surface 20 and the carrier plate 4 are sent to the assembly fixing device 54, where the first friction surface 20 is bonded to the carrier plate 4. The detailed structure of the fixing device is shown in FIG. 4, which will be described in detail. Basically, however, the first friction surface 20 and the carrier plate 4 are coaxially assembled on the assembly fixing device 54, and the molded semi-assembly 12 (see FIG. 6) is pressurized on the ash head conical molding machine. Is placed. Multiple semi-assemblies 12 may be arranged up and down on the assembly fixture 54. A pressure of about 190 psi (about 13.5 bar) is applied on the friction surface and the carrier assembly (2). The assembly fixing device 54 to which the semi-assembly 12 is fixed is sent to the curing oven 55, and the adhesive (Redux adhesive) is cured to attach each first friction surface 20 to each of the carrier plates 4 thereof. Heated for 5 hours at 180-190 ° C. or 2 and a half hours at 230-240 ° C. to bond.

The semi-assembly 12 is removed from the curing oven 55 with the fixed assembly fixture 54 fixed therein and then cooled in place 56 for 24 hours. The semi-assembly 12 of the first friction surface 20 adhered to the carrier plate 4 will hereinafter be referred to as a firmly bonded semi-assembly. This firmly bonded semi-assembly 2 can be sent back to the cleaning device 50 or directly to the fixing device 57 for storage for a while.

In addition, the second friction surface 22 passing through the washing device 50 is fixed in the storage fixing device 57 for a while.

The semi-assembly 12, which is firmly bonded to the second friction surface 22, is the adhesive device 58 showing the open state 58A and the closed state 58B from the temporary storage device 57 through the Robert 59. Are transferred.

The detailed configuration of the bonding apparatus 58 is shown in FIG. Basically, the second friction surface 22 is disposed on the underside of the device, and the adhesive layer 24 of the elastomer is described by Robert 59 in the applicant's patent application WO-A-91 / 10842. A semi-assembly 12, which is applied as a continuous bead 24A, is adhered coaxially to the second friction surface 22, and the carrier plate 4 is in contact with the adhesive. do. Then, the bonding apparatus is closed, and an upper side thereof applies a fixed pressure to the friction surface and the carrier assembly 2. The assembly is placed under a pressure of about 6-7 kg for 5-10 minutes and hot air above 60 ° C. is blown to allow the curing process to take place.

The assembled friction surface and carrier plate 4 are taken out from the bonding device 58 and sent to the curing oven 161, where it is maintained for 50 minutes at a temperature of 30 ° C. and a humidity of 40%. This accelerates the curing process.

Then, the carrier assembly 2 is loaded into the storage device 162 and sent to the curing region 163. Here, these assemblies are maintained at a temperature of 40 ° C. and a water-containing atmosphere for 24 hours and then sent to the curing oven 55 for post curing.

The carrier assembly 2 may be left for 48 hours at ambient temperature. Post-curing conditions are 180 ° C and time 5 hours.

The finished carrier assembly 2 is now ready for testing.

Since the temperature of the curing condition is 180 ° C. and the time is 5 hours, water is removed from the first and second friction surfaces 20 and 22 in two bonding processes. When the firmly bonded semi-assembly 12 and the finished carrier assembly 2 are returned to their normal equilibrium, the first and second friction surfaces 20 and 22 absorb moisture again, and the carrier assembly 2 carries the carrier. It may be deformed because of the elasticity of the plate 4. This problem causes the rigidly bonded semi-assembly 12 to be shaped into a shredded cone, and the first friction surface 20 together with the inner surface formed by the first friction surface 20 and the other side formed by the carrier plate 4. Can be solved by making the indentation form.

The firmly bonded semi-assembly 12 is fixed in the form of a red head cone using an assembly fixture 54 as shown in FIG.

The assembly fixing device 54 is composed of a lower plate 61 having an upper surface 62 having a recessed conical conical surface. The bottom plate 61 is mounted on a spring 63, which spring acts between the base plate 64 and the bottom plate, causing the bottom plate 61 to be upwardly raised. The lower plate 61 is guided on the coaxial boss 71 fixed to the base plate 64. The base plate 64 is mounted on a housing 66 that includes an annular fixing ring 65 that restricts upward movement of the bottom plate 61.

A hydraulic actuator 67 is disposed in the coaxial cylindrical space 68 of the housing 66 and has a reciprocating piston 69. The piston 69 has a head 73 that can be connected to the base plate 64 to move the base plate 64 upward with respect to the elasticity of the spring 63 (as shown at the right side of FIG. 4). Act on the coaxial central column 72.

The upper end 74 of the center circumference 72 allows the nut 75 to be screwed together. The nut 75 is connected to an upper plate 76 on which a downwardly protruding ashed conical surface 82 having a conical angle corresponding to the recessed upper surface 62 of the lower plate is formed.

The firmly bonded semi-assembly 12 is arranged in such a state that the carrier plate 4 is connected to the lower plate 61, and the friction surface 20 is coaxially arranged on the upper portion of the carrier plate 4. The carrier plate 4 is centered by the boss 71, the first friction surface 20 is disposed on the lower plate 61, and extends through the radially inner end of the slot 16 formed in the carrier plate. The center is centered by the pin 77. When a laminate in which a plurality of carrier plates 4 and a first friction surface 20 are sequentially stacked is arranged, the reciprocating piston 69 is retracted, and the spring 63 pressurizes the laminate of the semi-assembly 12 so that they Make it dish-shaped.

The spring 63 applies a pressure of 190 psi (13.5 bar) and the pressure difference due to the difference in friction surface thickness can be eliminated by tightening the nut 75 to contact the top plate 76 with the spring pressure released. have.

A bonding device 58 is shown in detail in FIG. 5, which consists of two parts, an upper portion 81 and a lower portion 82. The lower portion 82 has an annular space 83 formed with a planar base to which the second friction surface 22 is connected, and a planar support surface 84 for supporting the carrier plate 4, so as to have an inner edge of the carrier. Is placed on the radially inner side of the support surface 84, and the outer end of the spoke is placed on the radially outer side of the support surface 84 so that the carrier plate 4 spans the space 83. The depth D of the space 83 is such that the adhesive bead 24 can protrude above the space when deployed on the second friction surface 22. In this case the diameter of the bead is about 2.8 mm and the height between the carriage surface and the support surface is 2.5 mm.

The peripherally spaced pins 85 arranged around the inner circumference of the support surface 84 cause the carrier plate 4 to be disposed coaxially with respect to the axis of rotation. The pins 86 arranged at the outer periphery of the support surface 84 also aid in the placement of the carrier plate.

The lower surface 82 is friction surface center control means consisting of a coaxial central cam 87 connected to rotate in three peripherally spaced radial arms 88 with upright pins 89 disposed at radially outer ends thereof. This is buried. The arm moves radially inward and outward by reverse rotation and forward rotation with respect to the axis of the central cam 87, and the upright pin 89 acts on the outer circumference of the second friction surface 22 so that the friction surface is an annular space 83 To be centered.

The base of the space 83 is connected to the annular chamber 93 by the through hole 91 and the passage 92, which is connected to the outlet passage 94 which is connected to the vacuum source. The second passage 95 extends through the lower portion 82 and opens to the upper surface side thereof. The second passageway 95 may be connected to a hot air source.

The upper side 81 is composed of a holding ring 96 composed of spaced circular arc pads 106 that fix the radially inner portion of the carrier plate 4 to the support surface 84. The fixing pad 106 is attached to a housing 97 connected to the piston 98 of the hydraulic or pneumatic actuator.

The housing 97 has a coaxial space 99 opposite the lower part 81 on which the other actuator 101 is mounted, which is fixed to the housing and has a reciprocating piston 102 with a pressure plate 103 attached thereto. Have The pressure plate can be moved axially with respect to the housing 97 and the retaining ring 96 by the actuator 101, fixed to the pressure plate and spaced in the peripheral direction guided from the housing 97 to the bushing 105. Guided by a pin 104.

The second friction surface 22 is disposed in the space 83 and centered by a centering mechanism composed of a central cam 87, a radial arm 88 and an upright pin 89. As the vacuum is applied to the through hole 91 through the outflow passage 94, the friction surface is fixed at the center adjusted position.

The elastomeric adhesive layer 24 is applied to the exposed surface of the first friction surface 20 in the form of a desired bead pattern, for example in the form of a continuous vortex or a concentric circle with a connection, and the semi-assembled 12 firmly bonded It is arranged in the space 83 and centered with the pin 86.

In addition, since the upper side 81 is moved by the piston 98 of the pneumatic actuator, the fixing ring 96 (shown in broken lines) fixes the inner side of the carrier plate 4 on the support surface 84 in plan view. .

The pressure plate 103 is moved by the actuator 101 to press the first friction surface 20 so that the friction surface becomes flat, and the carrier plate 4 is pressed to contact the adhesive bead. The actuator 101 exerts a pressure of about 7 kg.

Hot air at 60 ° C. is supplied through the second passage 95 and the space 83 and cures the adhesive by circulating around the carrier assembly 2 and the adhesive 24.

Claims (15)

Friction surface and carrier where the first annular friction surface is bonded to one side of the carrier plate with a first thermosetting adhesive and the second annular friction surface is bonded to the other side of the carrier plate with a second elastomeric adhesive. A method of making an assembly, the method comprising the steps of: adhering a first friction surface to a carrier plate with a first thermosetting adhesive, disposing a second friction surface in an annular mold space, and placing a second friction surface in the space Developing onto the surface, applying a second elastomeric adhesive to the exposed surface of the friction surface such that the second elastomeric adhesive protrudes above the mold, leaving the carrier plate adjacent to the second elastomeric adhesive and spanning the space Disposing the carrier plate and the first friction surface above the space so that the first friction surface and the carrier plate are developed in a planar manner so that the carrier plate is the second elastomeric adhesive. Method of producing a friction surface and the carrier assembly, characterized by consisting of a step of ever brought into contact with the pressure, curing the elastomer, the adhesive of the second. 2. A method according to claim 1, wherein the inner periphery of the carrier plate is fixed to the mold bottom before the first friction surface and the carrier plate are developed in plan. The method of claim 1 or 2, wherein the second elastomeric adhesive is applied to the friction surface in the form of concentric beads or strips, and hot air is blown through the mold space while the second elastomeric adhesive is cured. Characterized in that pressure is applied. 2. The assembled friction surface and carrier plate of claim 1 are held in a first step for 40-60 minutes at a temperature of 30 ° C. and a humidity of about 40%, and in a second step, at least 40 ° C. above 24- ° C. in a water-containing atmosphere. Left for 48 hours and post-cured in three steps which are heated to 180 ° C. for five hours in a third step. 2. The process of claim 1 wherein a first friction surface is adhered to said one side of the carrier plate at an elevated temperature for the required time, and wherein the first friction surface and the carrier plate form an assembly of carrier plate and adhesive friction surface during the curing process. Characterized in that it is press-fixed to the holding device so as to be in the form of a red cone. 6. The method according to claim 5, wherein the conical shape is of a concave shape in which the outer surface of the cone is formed by the carrier plate and the inner surface is formed by the first friction surface. Carrier plate, consisting of an annular first friction surface bonded to one side of the carrier plate with a relatively hard first adhesive, and an annular second friction surface bonded to the other side of the carrier plate with a second elastomeric adhesive In the apparatus for manufacturing a friction surface and a carrier assembly, the apparatus consists of two parts, and the first part has an annular space having a flat base formed therein so that the second friction surface can be inserted therein, and the flat supporting surface is a space. Support the carrier plate coaxially in the above, the depth of the space is the depth that the elastomeric adhesive applied in the form of beads to the friction surface can protrude to the top of the support surface, the second portion is the first friction surface and the carrier plate In a planar manner to secure a portion of the carrier plate against a pressure plate having a planar portion which presses against the exposed surface of the support surface and the first friction surface so that the carrier plate contacts the elastomeric adhesive. Apparatus for manufacturing a friction surface and the carrier assembly, characterized by having fixed means. 8. An apparatus according to claim 7, wherein the planar base of the annular space formed in the bonding device is opened to the space side and has a through hole that can be connected to a vacuum source for applying vacuum to the space. 8. The apparatus of claim 7, wherein the space can be connected to a gas source. 8. A device according to claim 7, wherein the first portion of the device comprises a cam actuator acting on the outer periphery of the second friction surface to center the second friction surface relative to the space. 8. The method according to claim 7, wherein the fixing means comprises a fixing pad connected to the first actuator, and the pressure plate for unfolding the first friction surface in a plane is connected to the second actuator for axial movement regardless of the fixing pad. Device. 8. An apparatus according to claim 7, wherein the pressure plate is a plate which cooperates with the first portion of the bonding device to form a passage for supplying fluid to the mold space for curing the second elastomeric adhesive. 8. The apparatus of claim 7, further comprising an adhesive jig for assembling the first friction surface on the carrier plate to constitute the first friction surface and the carrier assembly, wherein the adhesive jig is disposed with at least one first friction surface and the carrier assembly. And a fixing device having a lower back conical molding machine and an upper back conical molding machine for fixing the assembly to the lower molding machine under a predetermined pressure upon floating. 14. The apparatus of claim 13, wherein the fixing device is capable of fixing the stack consisting of a plurality of said friction surfaces and carrier assemblies. 15. An apparatus according to claim 13 or 14, wherein a fixed pressure is applied to the spring.