JPH06509410A - Manufacturing method and device for assembly of friction facing and support - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Manufacturing method and device for assembly of friction facing and support The present invention provides a clutch driven plate friction facing material and support assembly. The present invention relates to a manufacturing method and apparatus.

In particular, the present invention provides for A group of friction materials bonded to opposite sides of the support plate by a relatively resilient adhesive Applicant's patent application describing a support assembly having a second group of friction materials A facing and a support of the type disclosed in WO-A-90108908. The present invention relates to a method of manufacturing an assembly.

The support plate is formed of spring steel and has circumferentially spaced outward projections on its outer periphery. a series of paddles to which a first friction facing is attached. ing. This structure allows facings and supports to flex circumferentially. Let it be. Flexibility of support plate and two facings and support plate Problems may arise during manufacturing due to the different nature of the two joints formed between them. Ru.

According to the present invention, the first annular friction facing is relatively cured by the first thermosetting adhesive. A second annular friction facing is coupled to one side of the flexible support plate. A friction clamp is connected to the opposite side of the support plate by a elastomeric adhesive. Provided is a method of manufacturing a clutch and support assembly, the method including a first friction face. bonding the friction face to the support plate with a first thermosetting adhesive; placing a ring within the annular recess; extending a second facing within the recess; Place the adhesive onto the exposed surface of the facing so that the adhesive protrudes above the mold. step, place the support plate adjacent to the adhesive and extend it into the recess to attach the support and placing the first connecting facing over the recess, the first facing and the support; Stretch the plate so that the support plate is pressed into contact with the adhesive. and a step to provide initial curing in the second adhesive. There is.

Conveniently, the first facing is heated to said one side of the support plate at an elevated temperature for a required period of time. and the first facing and support plate are coupled to the support plate and the coupling face. During the curing process to form an assembly with the Retained within the fixture.

According to the present invention, in the assembly of the friction facing and the support, the support plate and the first is bonded to the side of the support plate by a relatively rigid adhesive. Opposite side of support plate by first friction facing and second nylastomer adhesive and a second friction facing coupled to the friction facing and support assembly. a flat base for receiving a second friction facing therein; A flat support surface that coaxially supports the support plate is provided on the recess, and the depth of the recess is The elastomer adhesive added to the facing protrudes upward from the supporting surface. a first portion having an annular recess adapted to be attached to the support plate; Press against the clamping device that clamps the surface and the exposed surface of the first facing. Stretch the first facing and support plate and bond the support plate with elastomer. two parts with a second part comprising a pressure plate having a flat surface in contact with the agent; A manufacturing device is obtained that includes a coupling device that includes.

Advantageously, the apparatus further comprises forming a first friction facing and support assembly. Includes a joining jig for assembly of the first friction facing with the support plate. The coupling jig includes at least one set of a first facing and a support. Lower truncated conical tool on the base on which the solid is placed and assembled under the planned load Mounting with an upper matching truncated cone former clamping the body to a lower former Tools included.

The invention will be described by way of example with reference to the accompanying drawings, in which: FIG.

FIG. 1 is a plan view of the friction facing and material support assembly of the type to be manufactured; It is.

Figure 2 is the line from Figure 1! 1-11 is an enlarged radial cross section for FIG.

FIG. 3 is a schematic flowchart showing a method of manufacturing the facing and material support of FIG. Ru.

FIG. 4 shows the support plate and the first friction plate coupled thereto during the first stage of the manufacturing process. This is a type of joining jig used to form a conical shape with a rubbing facing.

Figure 5 shows a support plate for the second friction facing with a resilient elastomeric adhesive. It is a coupling device that couples to the

6 and 7 illustrate the rigid coupling and support plate subassembly.

1 and 2, the assembly of the friction material and support is shown. Friction used in clutches, such as automobile diaphragm spring clutches It forms part of the clutch driven plate.

The support assembly 2 has internal splices when the assembly is assembled into the driven plate. disc-shaped with an opening at 6 in the center to accommodate a hub (not shown) with a A flat steel support plate 4 is included. Support plate 4 also includes industry A window 10 for a torsional vibration damping spring and a hole for fixing a rivet, as is known 12 are formed.

The support plate 4 has around its periphery an outwardly projecting compound integral with the main body of the support plate. There are several paddles or spokes 14. Spokes are flat, in use and assembled The slot 16 allows the body 2 to rotate approximately around the central axis X around which the body 2 is intended to rotate. They are spaced approximately equiangularly.

In this example, 30 spokes 14 and 30 slots 16 are shown.

Each spoke extends circumferentially over approximately 7 degrees and the slot extends approximately 5 degrees. It is growing. If desired, the number, size, shape and spacing of spokes can be varied. You can do something like that.

The spokes 14 can be elastically deflected along a direction substantially parallel to the axis X of the leaf spring. It can be bent in the axial direction. As a result, the support at the spoke 14 The holding plate 4 can be flexible so that it can be freely bent in the circumferential direction.

The first and second coaxial annular friction facings 20.22 are respectively arranged on each spoke 1 It is joined to the rear surface of 4. The first friction facing 20 is spliced with an adhesive 23. join to the network. This adhesive 23 is a thermosetting nitrile/phenol resin adhesive. The drug is [REDUX 80] (trade name). Other synthetic resins Similar to adhesives, various thermosetting phenolic resins can be used as adhesives. No. The two-friction facing 22 is in direct contact with the friction facing 22 and the spoke 14. It is bonded to the spokes 14 by an elastomeric material 24 that is applied. This example The elastomeric material 24 in FIG. Noricone rubber is disposed as holes 24a to 24c. this silicone is a compound that accelerates curing and creates an adhesive bond between the facing 22 and the spokes. It is a naturally vulcanized (RTV) material that is exposed to a moist heat atmosphere. The addition of heat also It has the effect of curing the thermosetting phenol resin layer 23.

The rubber is pasted onto the facing.

The elastomeric layer 24 is oriented in the axial direction of the friction facing 22 relative to the paddle 14. of considerable thickness so that it can act as a resilient cushioning material to allow movement in the be.

Adhesive layer 23, on the other hand, is comparatively non- or nearly non-resilient and therefore , the cushioning material for the friction facing 20 relative to the paddle 14 is quite young. Or almost nothing at all.

Each friction facing 20.22 is made of any suitable friction material, and possibly non-stone. It can be molded in cotton form.

A method of manufacturing the facing and support assembly is shown in FIG. Fesi cleaning unit 5o for cleaning and removal of any contamination. sent to. The first facing 20 is then fed into the adhesive applicator 5I, where it Redux adhesive is applied to one side of the facing 20 at.

At the same time, the support plate 4 is sent through a degreaser 52 and then to an adhesive applicator 51. Ru. The facing 23 and the support plate 4 are then bonded together with the adhesive thereon. The liquid is sent to a drying section 53 to remove the solvent. Solvents can be removed at high temperatures. and can be removed for 24 h at room temperature. The facing 20 is It may also be recirculated through the adhesive applicator 51 to receive the second layer of adhesive. Ru.

The facing 20 and support plate 4 are fed to an assembly fixture 54 where the facing 20 and support plate 4 are The housing 20 is connected to the support plate 4. Details of the fixture are shown in Figure 4. Although described in detail, the facing 20 and the support plate 40 are basically The formed subassembly 12 (see FIG. 6) is assembled coaxially on the fixture 54. ) is held on a truncated conical tool under load. Within the fixture 54, a plurality of subassemblies 12 can be arranged one on top of the other. facing and support A load of approximately 13.5 bar (approximately 190 psi) is applied on the assembly 2 with the tool. Ru.

The fixture 54 holding the subassembly 12 is then placed in a curing oven 55 and reduced. Allow the Redux adhesive to cure and attach each facing 20 to its After bonding to each support 4, heat at 180-190°C for 5h or 230°C. It is held at 240°C for 2.5 hours.

The fixture 54 holding the subassembly 12 in place is then removed from the furnace 55. It is then placed in the cold section for 24 hours at position 56. Face coupled to support 4 Subassembly 12 of ring 20 is hereinafter referred to as the rigid coupling subassembly. rigid coupling subassembly The body 12 is hacked into the cleaning unit 50 or for temporary storage. It can also be advanced directly to the charging fixture 57.

The second facing 22 that has passed through the cleaning unit 50 is also placed in a location for temporary storage. It is held within a positioning fixture 57.

The second facing 22 and rigid coupling subassembly 12 are then placed in the positioning fixture 57. from the robot to coupling device 58, shown in open state 58A and closed state 58B. 59 can also be transported.

Details of coupling device 58 are shown in FIG. Basically, the lower part of this device is Two facings 22 are placed, Applicants' patent application No. WO-A-91/1084 The elastomer adhesive 24 is applied to the robot in a continuous heel shape 24A as disclosed in No. 2. 59 and also contact the rigid coupling subassembly 12 or support plate 4 with the adhesive. and is placed coaxially with the facing 22 in the lower part of the device. Then the coupling device is closed with its upper part and a clamped load is placed on the facing and support assembly 2. Add weight. Assembly 2 is held for 5 to 10 m1n under a load of approximately 6 to 7 kgf. At the same time, hot air at a temperature of up to 60°C is assembled to begin the curing process. It is blown through the body.

The assembled facing and support plate 2 are removed from the coupling device 58. Then, it is sent into a curing furnace 61 and heated at 30°C and 40% humidity for about 50m1n. is maintained in the state of This accelerates the initial curing process.

The assembly 2 can then be loaded into the storage fixture 62 and transported into the curing section 63, where it The trowels were held for 24 h in a humid atmosphere at a temperature of 40 °C; It is then sent to a furnace 55 for post-curing.

Alternatively, the assembly 2 can be kept at ambient temperature for 48 hours. Post-curing strips The condition is a temperature of 180°C for about 5 hours.

The finished assembly 2 is now ready for testing.

Due to the curing at 180°C for 5h, moisture is removed from the friction phase during the two bonding processes. removed from the thing 20,22. Rigid joint subassembly 12 and finished assembly When solid body 2 then returns to normal equilibrium, fingers 20.22 reabsorb water and The assembly 2 is prone to distortion due to the resilient nature of the support plate 4.

This problem can be solved by forming the inner surface with the facing 20 and the outer surface with the support plate 4. a rigid coupling subassembly in a truncated conical shape that holds the facing 20 in a concave shape; This can be improved by forming 12. 267mm diameter face In order to prevent distortion of the ring, a conical angle has been found. Feed of different diameter A different cone angle would be required for the

Rigid coupling subassembly 12 is assembled into a truncated circular shape through the use of assembly fixture 54 shown in FIG. held within the correct shape.

The assembly fixture 54 has a top surface 62 with a concave truncated conical surface. A lower plate 61 is included. The lower plate 61 is the lower plate 61 a spring acting between the base plate 64 and the lower plate to bias the It is attached to 63. The lower plate 61 is fixed to the base plate 64. is guided over the coaxial post 71. The base plate 64 is above the lower plate 1-61. abutting a housing 66 containing an annular retaining ring 65 that limits movement towards the I feel supported.

A hydraulic actuator 67 is located within a coaxial cylindrical cavity 68 of the housing 66, and a reciprocating piston It is equipped with Stone 69. The piston 69 is connected to the spring 6 (as shown on the right side of FIG. 4). The base plate 64 is moved upward by contacting the base plate 64 against the biasing force of 3. It can act on a coaxial central column 72 with a head 73 that can be moved.

The upper end portion 74 of the post 72 is intended to accommodate a cooperating threaded nut 75. ing. The nut 75 has a conicity of 0 to align with the concave surface 62 on the lower plate. It rests on an upper portion plate 76 having a downwardly convex truncated conical surface 82 with .

Rigid coupling subassembly 12 is placed against lower plate 61 together with first support plate 4. The facing 20 is then placed coaxially onto the top of the support plate 4. support play The facing 4 is centered on the boss 71 and the facing 20 is positioned within the lower plate 61. and extending through the radially inner end of the slot 16 in the support plate. It is centered on pin 77. Alternating support plates 4 and facings 20 The stack is built up and then the piston 69 is retracted and the spring 63 is removed from the subassembly. A clamp load is applied to the 12 stacks to dish them out.

A load of 13.5 bar (190 psi) is applied by the spring 63, and the spring load Tighten the nut 75 to bring it into contact with the upper plate 76 at the same time as the weight is relieved. This eliminates any differential pressure due to facing thickness tolerances. .

FIG. 5 shows the coupling device 58 in detail, with an upper part 81 and a lower part 82. It contains two parts.

The lower portion 82 has an annular recess with a flat base for receiving the friction facing 22. 83 and a flat support surface 84 for supporting the support plate 4, so that during use, The inner edge of the support rests on the radially inner portion of the support surface 84 and on the radially inner portion of the paddle 14. The outer end rests on the radially outer part of the support surface 84 so that the support plate 4 It is expanded into the recess 83. The depth D of the recess 83 is determined by the adhesive bead 24 or the facing. 22 so as to protrude above the recess when placed on top. In this case, the face A bead with a diameter of approximately 2.8 mm and a height of 2.5 mm is provided between the ring and the support surface. It will be done.

Circumferentially spaced pins 85 disposed about the inner circumference of the support surface 84 It serves to position the rate 4 coaxially with respect to the axis of rotation. The outer periphery of the support surface 84 Pins 86 arranged around it also assist in positioning the support plate 4.

The lower portion 82 has three sets of upright pins 89 located at their radially outer ends. a central coaxial shaft pivotally connected to circumferentially spaced radial arms 88; A friction facing 6 ejecting device including a diaphragm 87 is housed therein.

Rotation of the cam 87 back and forth about its axis causes the arm to move radially in and out. and the pin 89 is inserted into the facing to center the facing with respect to the annular recess 83. It acts on the outer circumference of the thing 22.

The base of the recess 83 leads to an annular chamber 93 connected to an outlet passage 94 connectable to a vacuum source. , a hole 91 and a passage 92. The second passage 95 passes through the lower part 82 Proceed forward and open at the top. Passage 95 is connectable to a source of hot air.

In use, the upper part 81 has a support plate 4 radially inward with respect to the support surface 84. A clamp line formed of spaced arcuate pads 106 clamping a portion of the Contains 96. Clamp pads 1-6 are used for piping of hydraulic or pneumatic actuators. It is attached to a housing 97 connected to a stone 98.

Housing 97 is fixed to the housing and has pressure plate 103 attached thereto. In the lower part 81 which houses another actuator +01 having a reciprocating piston 102 A facing coaxial recess 99 is provided. The pressure plate is connected to the housing by actuator +01. It is movable in the axial direction relative to the clamping ring 97 and the clamping ring 96. Therefore, it is fixed to the pressure plate and guided to the bushing 105 in the housing 97. The pins 104 are guided by circumferentially spaced pins 104 .

In use, the facing 22 is placed within the recess 83 and the centering mechanism 87.88.89 Centering is done on that basis.

A vacuum is applied through passage 94 to hold the facing in its centered position. It is added to the hole 91.

Elastomeric adhesive 24 is placed over recess 83 and centered by bottle 84. The exposed surfaces of the facing 20 and rigid coupling subassembly 12 are marked with the desired beads. Visualization of patterns, such as continuous spiral lines or concentric circles with link parts between adjacent circles. It is applied as a code.

Then the upper part 81 or the crumbling ring 96 (shown in dotted line) is attached to the support plate 4. Moved by actuator 98 to hold the inner portion flat on support surface 84 .

Next, the pressure plate +03 presses against the facing 20 and stretches it. , the actuator 101 presses the support plate 4 into contact with the adhesive bead. more moved. A load of approximately 7 kgf is applied by actuator +01.

The hot air at 60°C then passes through passage 95 and then through recess 83 and thus Circulate through assembly 2 and around adhesive 24 to begin curing.

FIG5 FtG7 International search report Ql’7/7j5111/, ncl19. ,,,,,N@P CT/GO93100602 International Search Report Continuation of front page (72) Inventor: Power Spartson, Aletsuk, Trevor UK GV 34 4 Kyuei Warwickshire, Warwick, Francis Avenue 5 (72) Inventor: Griffin, Malcolm, UK GV 345 ND Warwickshire, Warwick, Woodrose Park, Hicks Close 26 (72) Inventor: Milling, John, Leslie UK 346E Luard 29 Aragon Drive, Warwick, Warwickshire (72) Inventor Hailston, Graham, Thomas UK G-V 230 L.L., Warwickshire, Rugby, Prinklow.

Lutterworth Road 61

Claims (15)

[Claims] 1. An annular friction facing is attached to a resiliently flexible support plate by a first thermosetting adhesive. A second friction facing is bonded to one side of the plate and a second resilient elastomer bonded to it. between the friction facing and the support, which are connected to opposite sides of the support plate by means of a In the method of manufacturing the assembly, the first friction facing is supported by the first thermoset adhesive. coupling to the plate; placing a second friction facing within the annular recess; Stretching the second facing in the recess, so that the adhesive protrudes above the mold. Place the adhesive onto the exposed surface of the facing, placing the support plate adjacent to the adhesive. and extend it into the recess to place the support and the first facing facing onto the recess. During the placing step, the first facing and support plate are expanded, thereby providing support. pressing the holding plate into contact with the adhesive; and a second adhesive. A manufacturing method comprising the step of providing an initial cure in a process. 2. The method according to claim 1, wherein the load is not applied to the facing. A method that ensures that the inner circumference of the support plate is clamped against the bottom molding surface before Law. 3. A method according to claim 1 or 2, in which the adhesive is arranged in concentric beads. A resilient elastomeric adhesive applied to the friction facing in the form of a cord or string. As the agent undergoes initial curing, hot air is blown through the molding recess to reduce the load. How to get it added. 4. In the method according to any one of claims 1 to 3, The erected facing and support plates are then erected in three stages, namely firstly about 4 At a temperature of 30°C for 40-60 min at 0% humidity, the second hydrated withstand up to 40°C for 24-48h in the atmosphere, and for 5h A method of post-curing by heating to 180°C. 5. In the method according to any one of claims 1 to 4, the first A facing is bonded to said side of the support plate at an elevated temperature for a required period of time, and - The facing and support plate are in the fixture under load during the curing process. A combination of a support plate held in a truncated conical shape and a joined facing. How to make it form a solid. 6. In the method according to claim 5, the conical shape is The inner surface is formed by the holding plate and has a concave shape formed by the first facing. How to do it. 7. In the friction facing and support assembly, the support plate and the first comparative with a first friction facing bonded to the sides of the support plate by a rigid adhesive. , a second friction film bonded to the opposite side of the support plate by a second elastomeric adhesive; A manufacturing device for assemblies of friction facings and supports, including In this case, a support plate is placed on the flat base, recess that receives the second friction facing. Equipped with a flat support surface that supports coaxially, and the depth of the recess is faced in a bead shape. an annular recess in which an elastomer adhesive applied to the elastomeric adhesive projects upwardly from the support surface; and a clamp for clamping a portion of the support plate to the support surface. The first facing and support are pressed against the exposed surface of the first facing and the first facing. Pressure with a flat surface that stretches the tool and brings the support into contact with the elastomeric adhesive A manufacturing device comprising a joining device comprising two parts with a second part comprising a plate. 8. The device according to claim 7, in which the flat surface of the annular recess in the coupling device a hole opening into the recess and connectable to a vacuum source for applying a vacuum to the recess; The device that has there. 9. The device according to any one of claims 12 to 14, A device whose recess can be connected to a gas atmosphere. 10. The device according to any one of claims 7 to 9, a second friction face for centering said facing with respect to the recess; device that includes a cam actuator that acts on the outer circumference of the housing. 11. The device according to any one of claims 7 to 10, The clamping device includes a clamp pad coupled to a first actuator; axial movement of the pressure plate that extends the clamping pad independent of the clamping pad. device connected to a second actuator for 12. In the device according to any one of claims 7 to 11, A pressure plate directs fluid into the molded recess to cure the elastomer adhesive. A device which is a flat plate cooperating with a first portion of the coupling device to form a delivery passageway. 13. The apparatus according to any one of claims 7 to 12, a first friction facing for forming an assembly of a first friction facing and a support surface; a coupling jig for assembly with the support plate of the at least one first phase; A downwardly truncated conical tool on the base on which the thing and support assembly rests, and a and an upper matching truncated cone former to clamp the assembly to the lower former under load. a fixture included in said joining jig. 14. 14. The apparatus of claim 13, wherein a plurality of said facings and Apparatus in which a fixture can hold a stack including an assembly with a support. 15. In the device according to claim 13 or 14, the clamp load A device in which force is applied by a spring.