JP4880242B2 - Friction plate manufacturing method and manufacturing apparatus - Google Patents

Description

  The present invention relates to a method of manufacturing a friction plate used in a friction engagement device such as an automatic transmission such as a vehicle.

  Friction plates used in friction engagement devices such as wet multi-plate clutches are manufactured by attaching an annular facing made of an annular friction material to both sides or one side of an annular metal core plate with an adhesive or the like. The

  An example of a conventional manufacturing apparatus is disclosed in Patent Document 1. An apparatus for manufacturing a friction plate, that is, a clutch plate, manufactures a clutch plate by bonding an annular friction ring (facing) to both sides of a metal ring.

  In order to bond the friction ring to the metal ring, the temperature is precisely controlled using a conductive ring device, the thermosetting adhesive is melted, the friction ring is bonded to the metal ring, and the clutch I'm making a board.

Prior art document information related to the invention of this application includes the following.
Japanese Patent Publication No. 56-53127

  In the conventional manufacturing apparatus and method described above, if the facing is protruded from the core plate due to misalignment between the core plate and the facing during bonding, the friction material may fall off and cause the hydraulic piston to malfunction. Bring. For this reason, after bonding, the outer diameter portion is chamfered with a polishing paper material to remove the overhang of the facing.

  This chamfering process involves a facing friction material, core plate metal powder, and abrasive dust, and causes an increase in manufacturing cost due to deterioration of the working environment and removal of dust adhering to the product.

  An object of the present invention is to provide a manufacturing method and manufacturing method of a friction plate that can be bonded to the core plate by positioning and centering with high accuracy of facing and do not require chamfering.

In order to achieve the above-described object, the method of manufacturing the friction plate of the present invention includes:
A method of manufacturing a friction plate comprising a core plate and a facing, used in a wet multi-plate clutch device,
A step of positioning an annular facing having an outer diameter smaller than the outer diameter of the core plate on the core plate with a predetermined offset amount by positioning members arranged at least three on the outer periphery of the core plate;
Pressing and bonding the facing to the core plate;
It is characterized by consisting of.

In addition, the manufacturing method of the friction plate of the present invention,
A method of manufacturing a friction plate comprising a core plate and a facing, used in a wet multi-plate clutch device,
A step of positioning an annular facing having an inner diameter larger than the inner diameter of the core plate on the core plate by a predetermined offset amount by positioning members arranged at least three on the inner periphery of the core plate;
A step of pressing and bonding the facing to the core plate;
It is characterized by consisting of.

Furthermore, the friction plate manufacturing apparatus of the present invention includes:
A friction plate manufacturing apparatus that is used in a wet multi-plate clutch device and includes a core plate and a facing.
A positioning member for positioning at least three annular facings on the outer periphery of the core plate and having an outer diameter smaller than the outer diameter of the core plate on the core plate with a predetermined offset amount;
Means for pressing and bonding the facing to the core plate;
It is characterized by consisting of.

Furthermore, the friction plate manufacturing apparatus of the present invention includes:
A friction plate manufacturing apparatus that is used in a wet multi-plate clutch device and includes a core plate and a facing.
A positioning member that positions at least three annular facings having an outer diameter larger than the inner diameter of the core plate on the inner periphery of the core plate with a predetermined offset amount;
Means for pressing and bonding the facing to the core plate;
It is characterized by consisting of.

  In order to make the offset amount of the ring-shaped facing and core plate slightly smaller in diameter than the core plate constant between the core plate outer diameter portion or inner diameter portion and the facing outer diameter portion or inner diameter portion, at least three or more on the outer periphery of the core plate Positioning and centering are performed with a plurality of positioning members, and then pressure bonding is performed, so that a friction plate in which the facing does not overhang from the core plate is obtained.

  Therefore, the chamfering process of the facing that protrudes to the outer diameter or the inner diameter, which has been conventionally required, is not necessary, and the manufacturing cost can be reduced. Moreover, the generation of dust associated with the chamfering work is eliminated, and the working environment can be prevented from deteriorating.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same part is shown with the same code | symbol. In addition, it is needless to say that the embodiments described below are given by way of illustration of the present invention and are not limited in any way.

  FIG. 1 is a top view showing a main part of a friction plate manufacturing apparatus 30 according to an embodiment of the present invention. A substantially annular facing 2 made of a friction material is placed on a substantially annular metal core plate 1. As can be seen from FIG. 1, the radial width of the core plate 1 is larger than the radial width of the facing 2, and between the outer peripheral edge 1a and the inner peripheral edge 1b of the core plate, the outer peripheral edge 2a and the inner peripheral edge 2b of the facing 2, The surface of the core plate 1 is exposed in an annular shape.

  On the outer periphery of the core plate 1, six positioning jigs, that is, positioning members 3 are arranged in a circumferentially uniform manner. The positioning members 3 are biased by the springs 4 inward in the radial direction, that is, against the outer peripheral edge 1 a of the core plate 1. It is preferable that the pressing direction of all the positioning members 3 is toward the center of the core plate 1.

  2 and 3 are sectional views showing a positioning process of the facing by the manufacturing apparatus 30 according to the present invention. FIG. 2 shows a state in which the facing 2 is positioned by the positioning member 3. FIG. 3 shows that the upper bonding jig, that is, the upper adhesive member 12 (not shown in FIG. 2) is lowered after the positioning to move the facing 2. The state where it is pressed and bonded is shown.

  The facing plate 2 is bonded to the lower surface and the upper surface of the lower die jig, that is, the core plate 1 placed on the lower adhesive member 11. Therefore, as can be seen from FIG. 2, they are laminated on the lower adhesive member 11 in contact with each other in the order of the facing 2, the core plate 1, and the facing 2. For example, a thermosetting adhesive is applied to the upper and lower surfaces of the core plate 1 or applied to the bonding surface of the facing 2. Of course, if necessary, it can be applied to both the core plate 1 and the facing 2.

  A positioning member 3 that slides on a step portion 11a of a lower adhesive member 11 to be described later has a concave peripheral surface 3b that abuts the outer periphery of the core plate 1 and the concave peripheral surface 3b upward from the concave peripheral surface 3b via a tapered surface 3c toward the core plate 1. Is provided with a convex peripheral surface 3a. Further, below the concave peripheral surface 3b, a convex peripheral surface 3d that protrudes from the concave peripheral surface 3b in a taper direction toward the core plate 1 is provided. Further, a tapered surface 3e that recedes in the direction of the spring 4 is provided on the upper portion of the convex peripheral surface 3a.

  The positioning member 3 is urged by a spring 4 such as a coil spring in a direction to contact the outer peripheral edge 1a of the core plate 1. The outer peripheral edge 1 a of the core plate 1 is in contact with the concave peripheral surface 3 b of the positioning member 3 biased by the spring 4. In this state, the outer peripheral edge 2 a of the facing 2 placed on the upper surface of the core plate 1 is in contact with the tapered surface 3 c and is displaced radially inward from the outer peripheral edge 1 a of the core plate 1.

  The outer peripheral edge 2 a of the facing 2 disposed on the lower surface of the core plate 1 is displaced radially inward by the convex peripheral surface 3 d of the positioning member 3. The amount of backward displacement of the facing 2 in contact with the upper and lower surfaces of the core plate 1 from the outer peripheral edge 1a of the core plate 1 is substantially the same. This displacement amount is shown as an offset amount W in FIG. That is, the offset amount W corresponds to the distance between the outer peripheral edge 1 a of the core plate 1 and the outer peripheral edge 2 a of the facing 2.

  The convex peripheral surface 3a of the positioning member 3 protrudes inward in the radial direction from the outer peripheral edge 2a of the facing 2. Further, by increasing or decreasing the inclination of the tapered surface 3c of the positioning member 3, the offset amount W can be adjusted to a desired size. The positioning member 3 is positioned so that the outer peripheral edge 2a of the facing 2 retreats from the outer peripheral edge 1a of the core plate 1, and is positioned so that the center of the annular core plate 1 and the center of the annular facing 2 are aligned. That is, center alignment is performed. Positioning and centering are preferably performed simultaneously.

  In the state of positioning as described above, the upper adhesive member 12 is lowered to press the facing 2 as shown in FIG. An end surface 12 a of the upper adhesive member 12 near the positioning member 3 is flush with the outer peripheral edge 1 a of the core plate 1. Accordingly, when the upper adhesive member 12 starts to descend, the lower edge of the end surface 12a comes into contact with the tapered surface 3e of the positioning member 3, and further descends while sliding on the tapered surface 3e.

  When the upper adhesive member 12 is lowered while sliding on the tapered surface 3e, the positioning member 3 moves backward in the left direction against the urging force of the spring 4 in FIG. When the upper adhesive member 12 is further lowered, the end surface 12a rides on a flat convex peripheral surface 3a continuous with the tapered surface 3e. In this state, it is lowered until it contacts the facing 2 placed on the upper surface of the core plate 1. FIG. 3 shows this state.

  When the upper adhesive member 12 is lowered until it comes into contact with the facing 2, the positioning member 3 pushed out by the upper adhesive member 12 is displaced to a position retracted to the leftmost side, that is, a position farthest from the core plate 1. In this state, only the convex peripheral surface 3a of the positioning member 3 is in contact with the end surface 12 of the upper adhesive member 12, and the concave peripheral surface 3b is separated from the outer peripheral edge 1a of the core plate 1, and is convex with the tapered surface 3c. Each of the peripheral surfaces 3d is separated from the outer peripheral end of the facing 2.

  Although not shown, a heater is provided in the lower adhesive member 11 and / or the upper adhesive member 12, and pressurization and heating are performed to adhere the facing 2 to the core plate 1. When the thermosetting adhesive melted by heating is cured, the core plate 1 and the upper and lower facings 2 are firmly bonded. Since the positioning member 3 is separated from the core plate 1 during the bonding, heat transfer from the positioning member 3 can be cut off, and foaming of the adhesive applied to the core plate 1 or the facing 2 can be prevented.

  By the manufacturing apparatus 30 described above, a friction plate in which the facing 2 is bonded to the core plate 1 is obtained. Since the offset amount W is secured, the friction plate 20 in which the facing 2 does not overhang on the outer periphery of the core plate 1 is obtained.

  FIG. 4 is a cross-sectional view of the manufacturing apparatus 40 provided with a mechanism for preventing the misalignment of the facing 2. A pressing pin 13 urged in the facing 2 direction by a spring 14 is provided in a chamber 15 provided in the upper adhesive member 12. After being aligned by the positioning member 3, the upper adhesive member 12 is lowered and pressed in a state where the upper surface of the facing 2 is pressed by the pressing pin 13 to prevent the facing 2 from being displaced. That is, after being positioned in FIG. 2, that is, after the positioning member 3 is separated from the core plate 1 and the facing 2 in FIG. 3, the centered state is maintained. When the lower surface of the upper adhesive member 12 comes into contact with the facing 2, the tip of the pressing pin 13 is urged by the spring 14 so as to recede and be flush with the lower surface of the upper adhesive member 12.

  In the embodiment described above, the manufacturing apparatus 30 for the friction plate 20 includes the positioning member 3 and the upper adhesive member 12 and the lower adhesive member 11 that press-bond the facing 2 to the core plate 1. The substantially annular facing 2 may be formed by punching a friction material in a ring shape, or may be formed by punching a friction material in a segment shape and jointing at several points on the circumference. In addition, the positioning members 3 may be arranged equally around the circumference, or may be unevenly arranged. Further, in each embodiment, the facing 2 is bonded to the upper and lower surfaces of the core plate 1, but may be bonded only to one surface.

  5 to 7 are enlarged cross-sectional views showing examples of the positioning member 3. The basic configuration of the positioning member 3 shown in FIG. 5 is almost the same as that shown in FIGS. The outer peripheral edge 2a of the facing 2 is in contact with the tapered surface 3c of the positioning member 3, that is, the conical surface, and the outer peripheral edge 1a of the core plate 1 is in contact with the concave peripheral surface 3b, that is, the cylindrical surface. An outer peripheral edge 2a of the facing 2 under the core plate 1 is in contact with a conical convex peripheral surface 3d. The spring 4 is not shown.

  In the example of FIG. 6, the circumferential surface configuration of the positioning member 3 is different, the axial width of the cylindrical convex circumferential surface 3a is made larger than in the case of FIG. 5, and the width of the tapered surface 3c is made smaller. Further, a cylindrical convex peripheral surface 3f is provided further below the convex peripheral surface 3d. In this example, the facing 2 placed on the core plate 1 abuts on the cylindrical convex peripheral surface 3a, and the facing 2 positioned below abuts on the cylindrical convex peripheral surface 3f.

  In the example of FIG. 6, since the outer peripheral edge 2a of the facing 2 and the end surface 12a of the upper adhesive member 12 (not shown in FIG. 6) abut on the convex peripheral surface 3a, the axial width of the convex peripheral surface 3a is as shown in FIG. It is preferable to make it larger than the case. Further, in FIG. 6, all of the core plate 1 and the facing 2 are in contact with the cylindrical surface.

  FIG. 7 is an enlarged view showing still another form of the positioning member. In this example, the shape of the positioning member 23 is different from that of the positioning member 3 described above. The positioning member 23 is slidably mounted on the lower adhesive member 11, and as shown in FIG. 7B, the convex portion 23 a that contacts the outer peripheral edge 2 a of the facing 2 on the core plate 1, the core plate 1. A concave portion 23b that abuts on the outer peripheral edge 1a and a convex portion 23c that abuts on the outer peripheral edge 2a of the facing 2 under the core plate 1 are provided. The spring 4 is not shown.

  As can be seen from FIG. 7 (a), the convex portion 23a, the concave portion 23b, and the convex portion 23c (not visible in FIG. 7 (a)) are different from the above-described embodiment that is formed as a peripheral surface. It has a tapered shape and is provided with a narrow plane at the tip. In this plane, the facing 2 is offset by coming into contact with the outer periphery 1a of the core plate 1 and the outer periphery 2a of the facing 2.

  It is also possible to combine the shapes of the embodiments described above. For example, the convex portion in contact with the facing 2 can be a cylindrical surface, and the concave portion in contact with the core plate 1 can be a narrow plane shown in FIG. A combination of a cylindrical surface and a conical surface is also possible.

  In the embodiment described above, the positioning members 3 and 23 are disposed on the outer periphery of the core plate 1, but may be disposed and positioned on the inner periphery of the core plate 1. In this case, the inner peripheral edge of the facing 2 is offset and positioned with respect to the inner peripheral edge of the core plate 1. Also in the inner circumferential arrangement, the number of positioning members is arbitrary, and may be equal or uneven in the circumferential direction, as in the case of arrangement on the outer circumference. By providing at least three positioning members, the facing 2 can be aligned with the core plate 1.

It is a top view which shows the principal part of the manufacturing apparatus of the friction plate concerning one Example of this invention. It is sectional drawing which shows the positioning process of the facing by this invention, and shows before adhesion | attachment. It is sectional drawing which shows the positioning process of the facing by this invention, and shows the time of adhesion | attachment. It is sectional drawing of the manufacturing apparatus provided with the mechanism which prevents the core shift of the facing 2. FIG. It is an expanded sectional view showing an example of a positioning member. It is an expanded sectional view showing an example of a positioning member. It is an enlarged view which shows an example of a positioning member, (a) is a top view, (b) is sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Core plate 2 Facing 3,23 Positioning member 4 Spring 11 Lower adhesive member 12 Upper adhesive member 20 Friction plate 30 Manufacturing apparatus

Claims (27)

A method of manufacturing a friction plate that is used in a wet multi-plate clutch device and includes an annular core plate and a facing.
An annular facing having an outer diameter smaller than the outer diameter of the core plate is provided by a positioning member arranged at least three on the outer periphery of the core plate and biased in a direction to contact the outer peripheral surface of the core plate by a spring. Positioning on the core plate with a predetermined offset amount;
Pressing and bonding the facing to the core plate;
Tona is, the positioning member, which abuts against the concave circumferential surface to the outer peripheral surface of the core plate, is provided through the respective tapered surfaces on the top and bottom of the concave peripheral surface, a convex circumferential protruding direction of the core plate And the taper surface abuts on an outer peripheral edge of the facing in the positioning step . A method of manufacturing a friction plate that is used in a wet multi-plate clutch device and includes an annular core plate and a facing.
An annular facing having an inner diameter larger than the inner diameter of the core plate is provided by a positioning member arranged at least three on the inner periphery of the core plate and biased in a direction to contact the inner peripheral surface of the core plate by a spring. Positioning on the core plate with a predetermined offset amount;
Pressing and bonding the facing to the core plate;
Tona is, the positioning member, said a concave circumferential surface abutting against the inner peripheral surface of the core plate, respectively provided via the tapered surfaces above and below the concave peripheral surface, a convex shape protruding in the direction of the core plate A method of manufacturing a friction plate , comprising: a peripheral surface, wherein, in the positioning step, the tapered surface is in contact with an inner peripheral edge of the facing .   3. The friction plate manufacturing method according to claim 1, further comprising a step of aligning the core plate and the facing.   4. The friction plate manufacturing method according to claim 3, wherein the positioning step and the centering step are performed simultaneously.   3. The friction plate manufacturing method according to claim 1, wherein the facing is positioned by a curved surface composed of a cone and a cylindrical surface. 3. The method of manufacturing a friction plate according to claim 1, wherein the facing is positioned by a surface made of a pyramid and a linear surface made of a pyramid.   7. The friction plate manufacturing method according to claim 6, wherein the linear surface is a flat surface or a curved surface formed in a direction perpendicular to the straight line.   7. The method of manufacturing a friction plate according to claim 6, wherein the linear surface is formed of a polygonal pyramid or / and a polygonal column.   9. The method of manufacturing a friction plate according to claim 8, wherein the linear surface is composed of a pyramid and a prism.   3. The method of manufacturing a friction plate according to claim 1 or 2, wherein in the pressing and bonding step, bonding with heating is performed.   3. The method of manufacturing a friction plate according to claim 1, wherein the facing is positioned by a curved surface composed of a cylindrical surface and a cylindrical surface.   5. The friction plate manufacturing method according to claim 3, wherein an upper portion of the facing is pressed by a pressing pin after the centering step and before bonding to prevent misalignment between the core plate and the facing. Manufacturing method of friction plate.   13. The method of manufacturing a friction plate according to claim 1, wherein the positioning member is separated from the core plate during bonding. A friction plate manufacturing apparatus that is used in a wet multi-plate clutch device and includes an annular core plate and a facing.
At least three or more are arranged on the outer periphery of the core plate, biased in a direction to contact the outer peripheral surface of the core plate by a spring, and an annular facing having an outer diameter smaller than the outer diameter of the core plate is set to a predetermined offset amount. A positioning member for positioning on the core plate with
Means for pressing and bonding the facing to the core plate;
Tona is, the positioning member, which abuts against the concave circumferential surface to the outer peripheral surface of the core plate, is provided through the respective tapered surfaces on the top and bottom of the concave peripheral surface, a convex circumferential protruding direction of the core plate A friction plate manufacturing apparatus , wherein the tapered surface is in contact with an outer peripheral edge of the facing . A friction plate manufacturing apparatus that is used in a wet multi-plate clutch device and includes an annular core plate and a facing.
At least three or more are arranged on the inner periphery of the core plate, and are biased in a direction in contact with the inner peripheral surface of the core plate by a spring, and an annular facing having an inner diameter larger than the inner diameter of the core plate is set to a predetermined offset amount. A positioning member for positioning on the core plate with
Means for pressing and bonding the facing to the core plate;
Tona is, the positioning member, said a concave circumferential surface abutting against the inner peripheral surface of the core plate, respectively provided via the tapered surfaces above and below the concave peripheral surface, a convex shape protruding in the direction of the core plate A friction plate manufacturing apparatus comprising: a peripheral surface, wherein the tapered surface is in contact with an inner peripheral edge of the facing .   16. The friction plate manufacturing apparatus according to claim 14, wherein the positioning member aligns the core plate and the facing.   17. The friction plate manufacturing apparatus according to claim 16, wherein the positioning member simultaneously aligns and aligns the core plate and the facing.   16. The friction plate manufacturing apparatus according to claim 14, wherein the positioning member has a curved surface formed of a cone and a cylindrical surface.   16. The friction plate manufacturing apparatus according to claim 14, wherein the facing is positioned by a surface formed of a pyramid and a linear surface including a pyramid.   20. The friction plate manufacturing apparatus according to claim 19, wherein the linear surface is a flat surface or a curved surface formed in a direction perpendicular to the straight line.   20. The friction plate manufacturing apparatus according to claim 19, wherein the linear surface is formed of a polygonal pyramid or / and a polygonal column.   23. The friction plate manufacturing apparatus according to claim 21, wherein the straight surface includes a pyramid and a prism.   16. The friction plate manufacturing apparatus according to claim 14, wherein in the pressing and bonding step, bonding with heating is performed.   18. The friction plate manufacturing apparatus according to claim 16, wherein after the centering step and before bonding, an upper portion of the facing is pressed by a pressing pin to prevent misalignment between the core plate and the facing. Manufacturing equipment for friction plates.   16. The friction plate manufacturing apparatus according to claim 14, wherein the means for pressing and bonding heats.   The friction plate manufacturing apparatus according to claim 16 or 17, further comprising a pressing pin that presses an upper part of the facing, wherein the pressing pin is configured to prevent misalignment between the core plate and the facing after the alignment. An apparatus for manufacturing a friction plate, wherein the upper part of the facing is pressed to prevent the friction plate from being pressed.   27. The friction plate manufacturing apparatus according to claim 14, wherein the positioning member is separated from the core plate during bonding.

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