JP2002327782A - Production method for friction board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a production method for a friction board on which a frictional material is attached to a core plate without an adverse affect on the environment and which prevents the core plate from deforming. SOLUTION: The Fig. 1 shows the production process 1. The core plate 4 is supplied to a conveyor 23 as shown by an arrow F from a supplying means not shown in the Fig. in the left side of the Fig. The upper face is buffed by a roll buff 21 and then attracted to a conveyor 24 by magnetic force or the like. The under face is buffed by a roll buff 22. Further, the friction board 5 is formed through a demagnetizing process 30, rough cleaning process 40, finish cleaning process 50, adhesive coating process 60, drying process 70, and adhesion process 80. The friction material is shown by 6. Meanwhile, in the figure, 41 is a nylon brush, 42, 51 are showers, 52 is a nozzle, 61, 62 are large rollers, 63, 64 are small rollers, 65 is an adhesive, 67 is a adhesive tank, 68, 69 are valves, 71 is a furnace, and 81 is a hot press, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a friction plate used in an automatic transmission or the like, and more particularly to a pretreatment before a friction material is bonded.

[0002]

2. Description of the Related Art In a friction plate manufacturing process, in order to increase the bonding strength before a friction material is bonded to a core plate, steps such as roughening the bonding surface, degreasing and cleaning are included.

FIG. 5 shows a conventional example of a specific friction plate manufacturing process. The friction plate manufacturing process 101 includes a degreasing process 12.
0, pickling processing step 130, cleaning step 140, adhesive application step 150, drying step 160, and bonding step 170. As shown in FIG. 6, a plurality of core plates 102 are conveyed to each step while being held on hangers 103. In the drawing, reference numeral 104 schematically shows a rail for transporting the hanger.

First, in a degreasing step 120, a core plate 102 is added to an alkaline detergent 122 stored in a tank 121.
Soak. In the next pickling process 130, the tank 131
After the core plate 102 is immersed in the sulfuric acid 132 stored in the tank 134, the core plate 102 is rinsed with water by a shower 133 and further neutralized with a neutralizing agent 135 in a tank 134.

[0005] In the subsequent cleaning step 140, the shower 141
And the water 143 stored in the tank 142
And finish cleaning. Thereafter, the core plate 102 is cooled if necessary. Depending on the type of product, this cooling step may be omitted. Then, in the next adhesive application step 150, an adhesive is applied. The application of the adhesive is performed by storing the adhesive 152 in the tank 151 and immersing the core plate 102 therein.

The core plate 102 on which the adhesive has been applied enters a drying step 160 and passes through a furnace 161. By the drying here, the adhesive applied to the core plate 102 is cured to the extent that it does not drip. The application of the adhesive to the core plate 102 is completed in the steps so far.

The core plate 102 on which the application of the adhesive is completed
Is heated and pressed by a hot press 171 together with the friction material 106 in a subsequent bonding step 170 to be bonded to the friction material, whereby the friction plate 105 is completed.

[0008]

In recent years, environmental issues have been actively taken up. However, the use of the above-mentioned alkaline detergent or sulfuric acid or a neutralizing agent used in the pickling process is difficult. It is not preferable from the viewpoint of environmental protection.

As another method for roughening the surface of the core plate, blasting may be performed. However, when this blasting is used, there is a problem that the core plate is easily deformed. There is also a disadvantage in that peripheral equipment is worn.

Accordingly, an object of the present invention is to solve these problems and to provide a manufacturing method capable of securing the strength of the core plate.

[0011]

According to the present invention, in order to achieve the above-mentioned object, in a method of manufacturing a friction plate in which a friction material is bonded to a core plate, a pre-treatment is performed as a pre-treatment before performing the bonding. A manufacturing method characterized by applying a roll hub to the core plate, and further in a method of manufacturing a friction plate in which a friction material is bonded to both front and back surfaces of the core plate, The phase of the roll hub application direction is the same or 180
And a manufacturing method characterized by the following:

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The roll buff used in the present invention is not limited to a specific one, but one in which abrasive grains are embedded in urethane is used as an example. By using a roll buff in which abrasive grains are embedded in the urethane, the amount of core plate shaving can be minimized. And by shaving the core plate surface,
The conventional degreasing step and pickling step can be eliminated.

[0013] The magnetic attraction means used when performing processing on the lower surface side is obtained by disposing an electromagnet between upper and lower belts of the endless conveyor. Therefore, the configuration of the equipment can be simplified.

[0014]

FIG. 1 shows a flow of a manufacturing process, and FIG. 2 shows a supply process of supplying a core plate to the flow process of FIG. The core plate is supplied by the supply step 10 shown in FIG. 2 and enters the manufacturing step 1 shown in FIG.

1 includes a buffing step 20, a demagnetizing step 30, a rough cleaning step 40, and a
Finish cleaning step 50, adhesive application step 60, drying step 7
0, a bonding step 80. FIG. 3 shows a perspective view of the oscillation in the supply step.

The core plate supply step 10 includes the step of
1 and a roller conveyor 13. Stocker 11
The core plates 4 are stacked on each other, and are supplied two by two to the roller conveyor 13 by a transport device (not shown).

For example, a transfer device in which a three-jaw chuck that moves up and down is combined with a moving unit that moves in the left-right direction in FIG. 2 is used. The air cylinder is used for the three-jaw chuck, the vertical movement of the three-jaw chuck, and the lateral movement of the moving part.
Alternatively, a ball screw or the like is used for the vertical movement of the three-jaw chuck and the lateral movement of the moving unit.

The core plate 4 is supplied from the roller conveyor 13 to the oscillation 12, where the roller conveyor 13 oscillates left and right as shown by an arrow R in FIGS. 23, the core plate 4 is supplied while being distributed left and right. 14 in FIG.
Denotes a roller conveyor guide. This distribution prevents the roll buffs 21 and 22 from being partially worn in the buffing step 20. Also, by performing the buffing process while moving the roll buffs 21 and 22 in the axial direction instead of such distribution, it is also possible to prevent partial wear.

The buffing step 20 includes buffing rollers 21, 22,
Conveyors 23 and 24 are provided. The aforementioned supply step 1
The core plate 4 supplied from 0 is sent to the roll buff 21 on the conveyor 23,
1 buffs the top side first. Thereafter, when the core plate 4 is positioned below the conveyor 24 by the movement of the conveyor 23, the core plate 4 is sucked by the magnetic belt of the conveyor 24, and is transferred to and absorbed by the conveyor 24. In this state, the roll is fed to the roll buff 22 and the lower surface of the core plate 4 is buffed.

By buffing, the surface layer is finely scraped off as described above, so that the adhesive surface can be roughened and the oil adhering to the adhesive surface can be removed together. Therefore, the conventional alkali washing and pickling treatments can be omitted. When the buff is applied by the roll buff, a thin streak 8 is formed on the bonding surface 6 along the flowing direction of the core plate 4, as shown in FIG. In this case, there is a disadvantage that the core plate 4 is deformed.

However, if the lower surface is buffed while magnetically attracted to the conveyor 24 as described above, the phases of the streaks 8 on the upper surface and the lower surface can be aligned, and the above-described inconvenience occurs. Never. A spline 7 is provided on the inner peripheral surface of the core plate 4. Buffing process 2
0, so that the core plate 4
Is magnetized. Therefore, this magnetism is removed in the next demagnetization step 30.

The rough cleaning step 40 includes a nylon brush 41 and a shower 42. Here, dust adhering to the surface of the core plate 4 is flushed with water or hot water while rubbing with the nylon brush 41. The subsequent finish cleaning step 50 is for shower 5
1. A nozzle 52 is provided. Here, water or hot water is further applied to the core plate 4 to clean the bonding surface, and then compressed air is blown from the nozzle 52 to remove water.

The adhesive application step 60 includes large rollers 61 and 6
2. Small rollers 63 and 64, valves 68 and 69 used for supplying the adhesive 65, and a tank 67 for storing the adhesive 65 are provided. Here, the large roller 61 and the small roller 63, and the large roller 62 and the small roller 64 are each used as a set, and are arranged vertically. When the bubble 68 opens, the large roller 61 is opened.
The adhesive 65 is supplied between the small roller 63 and the
By opening 9, the adhesive 65 is supplied to the tank 67. Both the small rollers 63 and 64 have a role of adjusting the amount of the adhesive of the large rollers 61 and 62. The adhesive supplied between the large roller 61 and the small roller 63 disposed on the upper side is adhered and held by the large roller 61, and the large roller 62 and the small roller 64 disposed on the lower side are adhesive collected in a tank 67. 6
5, the adhesive 65 is wound up while being half-soaked, and the large roller 62 holds the adhesive.

The large roller 6 holding the adhesive 65
The adhesive 65 is applied by passing the core plate 4 between 1 and 62. The large rollers 61 and 62 are made of an elastic material such as rubber, so that the large rollers 61 and 62 are secured to the core plate 4. The arrow R in the figure indicates the direction of rotation. In addition, when the adhesive is applied by immersion as in the conventional case, the adhesive adheres to the inner peripheral surface of the core plate, so that the clearance accuracy cannot be accurately maintained with respect to the clutch hub as the mating member. However, if the adhesive is applied using a roller in this way, the adhesive will not be applied to the inner peripheral surface of the core plate, so that the clearance accuracy for the clutch hub can be accurately maintained. Will be possible.

In the drying step 70, the core plate 4 coated with the adhesive 65 is passed through a furnace 71. The inside of the furnace is maintained at a predetermined temperature, and hot air is blown against the core plate 4.
By this drying, the adhesive 65 is once dried. The transfer of the core plate 4 to the furnace is performed by suspending the core plates 4 one by one on the hanger instead of suspending a large number of core plates at a time as shown in FIG.

In the bonding step 80, the friction material 6 and the core plate 4 are positioned, and heating and pressing are performed by a hot press 81 in a state where the friction material 6 and the core plate 4 are overlapped.
When the heating / pressing state is maintained for a predetermined time, the adhesion between the friction material 6 and the core plate 4 is completed. That is, the adhesive 65 is once melted and then hardened again by this heating, and the bonding is performed during this time.

The embodiments of the present invention are not particularly limited to those described above, and the settings can be changed as appropriate. In the illustrated embodiment, a method of manufacturing a friction plate in which friction materials are adhered to both surfaces of a core plate has been described.
The method of the present invention is also applicable to a friction plate such as a lock-up clutch or a free cushion plate having a friction material adhered to only one surface.

In particular, when the present invention is applied to the production of a friction plate for a multi-disc clutch in which the friction material is adhered to only one surface and the other surface is used as a surface facing the adjacent friction plate, This is very suitable because it is easy to make the roughness different depending on the characteristics of the surface and the mating member surface.

[0029]

The present invention is configured as described above,
The use of alkaline detergents and neutralizers is no longer required, making it environmentally friendly. Further, since the phases of the streaks formed on the core plate by the buff can be made uniform, the effect of preventing deformation of the core plate is also obtained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a manufacturing process of the present invention.

FIG. 2 is a top view of a supply step.

FIG. 3 is a perspective view of a roller conveyor in a supply process.

FIG. 4 is a front view of a core plate after buffing.

FIG. 5 is a schematic diagram of a conventional manufacturing process.

FIG. 6 is a perspective view of a core plate hung on a hanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manufacturing process of friction plate 4 Core plate 5 Friction plate 6 Friction material 7 Spline 8 Strip 10 Supply process 11 Stocker 12 Oscillation 13 Roller conveyor 14 Guide 20 Buff process 21 Roll buff 22 Roll buff 23 Conveyor 24 Conveyor 30 Demagnetization process 40 Rough cleaning Process 41 Nylon brush 42 Shower 50 Finish cleaning process 51 Shower 52 Nozzle 60 Adhesive application process 61 Large roll 62 Large roll 63 Small roll 64 Small roll 65 Adhesive 67 Tank 68 Valve 69 Valve 70 Drying process 71 Furnace 80 Bonding process 81 Hot Press 101 Conventional manufacturing process 102 Core plate 103 Hanger 104 Rail 105 Friction plate 120 Degreasing process 121 Tank 122 Alkaline detergent 130 Acid treatment process 131 Tank 132 Sulfur 133 Shower 134 tank 135 neutralizer 140 washing step 141 shower 142 tank 143 hot water 150 adhesive applying step 151 tank 152 adhesive 160 drying step 161 furnace 170 adhering step 171 hot pressing

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J058 AA44 AA48 AA53 AA59 AA70 AA77 BA61 BA78 CB20 GA61

Claims (6)

[Claims] 1. A method of manufacturing a friction plate in which a friction material is bonded to a core plate, wherein a roll buff is applied to the core plate as a pretreatment before bonding the friction material. . 2. The method of manufacturing a friction plate according to claim 1, wherein the core plate is supplied to the roll buff while distributing the core plate left and right with respect to a loading direction. 3. A method for manufacturing a friction plate in which a friction material is adhered to both front and back surfaces of a core plate, wherein a phase of a roll buffing direction on each of the front and back surfaces of the core plate is the same or 180 degrees. The method for producing a friction plate according to claim 1 or 2, wherein 4. A method of manufacturing a friction plate in which a friction material is adhered to both front and back surfaces of a core plate, wherein the pretreatment is performed on a lower surface while the core plate is adsorbed from an upper surface. A method for manufacturing the friction plate according to claim 3. 5. The friction plate manufacturing method according to claim 4, wherein said pretreatment is performed on a lower surface side in a state where said core plate is magnetically attracted from an upper surface side, and thereafter demagnetization is performed. Plate manufacturing method. 6. A method of manufacturing a friction plate, comprising: a step of supplying a core plate; a step of performing the pretreatment; a step of performing demagnetization; and a step of performing cleaning.
The method of manufacturing a friction plate according to any one of claims 1 to 5, wherein a step of applying an adhesive and a step of bonding the core plate and the friction material are sequentially performed.