JPS63281727A - Manufacture of electromagnetic clutch rotor - Google Patents

Abstract

PURPOSE:To easily manufacture an electromagnetic clutch rotor high in material yield and small in size by pressing a metal disk, providing an internal and an external cylinder part in one direction, clamping them with clampers and drawing an outside cylinder part with a roll die. CONSTITUTION:The metal disk 1 having a center hole 2 is pressed or spun to draw the external circumferential part and the center part in one direction and form the rotor base 6 comprising the outside cylinder part 3 of a formed part for belting, the inside cylinder part 4 of a part fitted into a bearing member and the bottom plate 5 of a clutch part. Then, the bottom plate supporting surface 7 of one clamper 9 and the supporting part 8 of the inside cylinder part are brought into contact respectively with the internal circumferential surfaces of the bottom plate 5 and the inside cylinder part 4. Moreover, the mating part 10 with the opening end part of the other clamper 12 part and the receiver 11 of the outside cylinder part thereof brought into contact with respectively the opening end part of the outside cylinder part 3 and the internal circumferential surface thereof. In this manner, above-side base 6 is clamped by both clampers 9, 10 and revolved. Besides, a revolving roll die 13 is pushed against the external circumferential surface of the outside cylinder part 3 to draw it so that it is smaller in diameter than the external diameter of the bottom plate 5. In such a manner, it is possible to obtain an electromagnetic clutch rotor small in size and light in weight.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a rotor for an electromagnetic clutch used in a car cooler or the like.

[Prior Art] A rotor for an electromagnetic clutch has a clutch portion on one side and a core on the other side.A bearing member is fitted in the center of the rotor, and a rotating shaft is passed through the bearing member to rotate. A clutch plate is fixed to the shaft near the clutch part of the rotor, and with the rotor constantly rotating with a belt, the core is energized and the re-clutch plate is attracted to the clutch part of the rotor by magnetic force, stopping the rotation of the rotor. The information is transmitted to the rotating shaft via a plate, and as a rotor for an electromagnetic clutch, it is required to be particularly lightweight and compact in terms of its function.

In the conventional method of manufacturing rotors for electromagnetic clutches,
The rotor body A is shaped to a certain extent by general molding,
Further, the entire circumference and inner and outer diameters are cut using a cutting board or the like to form a core storage part B on one side and a belt hanging part C on the outer periphery (FIG. 7).

[Problems to be solved by the invention] According to the above conventional manufacturing method, the manufacturing work is troublesome;
There are problems in that there is a lot of waste in materials, high manufacturing costs, and it is difficult to reduce weight.Furthermore, the outer circumference of the rotor becomes large due to the formation of belt hooks on the outer periphery, making it difficult to downsize the rotor. .

The present invention provides a method for manufacturing a rotor for an electromagnetic clutch aimed at solving the above problems.

[Means for Solving the Problems] In order to achieve the above object, the present invention first squeezes out the outer periphery and central part of a metal disk in one direction by pressing or spinning to form a cylindrical part, and then A rotor substrate is formed in which the cylindrical part is a belt hanging part, the inner cylindrical part is used to fit a bearing member, and the bottom plate is a clutch part.Next, this rotor board is brought into contact with the bottom plate which will become a clutch part, and the bearing member is fitted into the rotor board. After clamping from both sides by a clamper that comes into contact with the inner peripheral surface of the inner cylindrical part that will become the belt hanging part and a clamper that comes into contact with the open end of the outer cylindrical part that will become the belt-hanging forming part, a roll die is pressed against the outer periphery of the outer cylindrical part. By holding and rotating the outer cylindrical portion, the outer cylindrical portion was formed to have a smaller diameter in the inner diameter direction than the outer diameter of the bottom plate that would become the clutch portion without changing the outer diameter of the bottom plate that would become the clutch portion.

[Example] Hereinafter, this invention will be described in detail based on an example shown in the drawings.

First, a steel plate is processed by press working or the like to form a disk 1, and at the same time, a center hole 2 is formed in the center of the disk 1 (FIG. 1).

A cylindrical portion is formed by pressing or spinning the outer periphery and central portion of this disk l in one direction, and the outer cylindrical portion 3 is used as a belt hanging portion, and the inner cylindrical portion 4 is used as a bearing member fitting portion, and a bottom plate 5 is formed. A rotor substrate 6 having a clutch portion is formed (FIG. 2).

Next, the rotor board 6 is attached to a clamper having a bottom plate support surface 7 which contacts the bottom plate 5 which becomes the clutch part, and an inner cylindrical part support part 8 which contacts the inner peripheral surface of the inner cylindrical part 4 which becomes the bearing member fitting part. 9 and an open end abutting surface 10 that comes into contact with the open end of the outer cylindrical part 3 which becomes the belt hanging part, and which receives the inner circumferential surface of the outer cylindrical part 3 which is narrowed in the inner radial direction as described later. After clamping the outer cylindrical portion receiving portion 11 that secures the core storage portion from both sides with a clamper 12 (FIG. 3), a roll die 13 that can slide left and right is pressed against the outer peripheral surface of the outer cylindrical portion 3. By strongly pressing the clamper 12 while rotating the clamper 9 and 12 and the roll die 13, and by strongly pressing the roll die 13 against the outer peripheral surface of the outer cylindrical portion 3, the outer cylindrical portion 3 is attached to the outside of the bottom plate 5 which becomes the clutch portion. Without changing the diameter, it is formed to have a smaller diameter in the inner diameter direction than the outer diameter of the bottom plate 5 which will become the squeeze reclutch portion (FIG. 4).

The rotor formed in this way has an outer cylindrical portion 3 that serves as a belt hanging portion having a smaller diameter than the outer diameter of the bottom plate 5 that serves as a clutch plate, and the outer cylindrical portion 3 and the bearing member fit together. A core storage portion 14 is formed between the inner cylindrical portion 4 and the inner cylindrical portion 4 (FIG. 5).

Fig. 6 shows an example in which a pulley is attached to the outer periphery of the outer cylindrical part 3, which becomes the belt hanging part of the rotor formed as described above. V having a hole 15 equal to the diameter and one V groove 16 on the outer periphery
The pulley 17 is press-fitted into the outer periphery of the outer cylindrical part 3 and fixed by welding.
Poly V pulley 18 with multiple V grooves 16 on the outer periphery
is press-fitted onto the outer periphery of the outer cylindrical portion 3 and fixed by welding.

19 is a core, 20 is a bearing member, and 21 is a rotating shaft.

[Effects of the Invention] As described above, according to the method of manufacturing a rotor for an electromagnetic clutch according to the present invention, a cylindrical portion is formed by squeezing out the outer peripheral portion and the central portion of a metal disk in one direction by pressing or spinning, A rotor substrate is formed in which the outer cylindrical part is a belt hooking part, the inner cylindrical part is used for fitting a bearing member, and the bottom plate is a clutch part, and the rotor board is brought into contact with the bottom plate serving as the clutch part and is used for fitting the bearing member. After clamping from both sides by a clamper that comes into contact with the inner peripheral surface of the inner cylindrical part that will become the belt-hanging part and a clamper that comes into contact with the open end of the outer cylindrical part that will become the belt-hung forming part, a roll die is pressed against the outer periphery of the outer cylindrical part. By rotating, the outer cylindrical part is formed to have a smaller diameter in the inner diameter direction than the outer diameter of the bottom plate, which becomes the clutch part, without changing the outer diameter of the bottom plate, which becomes the clutch part, so manufacturing work is easy. Since there is no wasted material, it is possible to significantly reduce costs, and since it is formed from a metal disc, it is lightweight, and the belt hanging part is made to have a smaller diameter than the outer diameter of the bottom plate that becomes the clutch part. Therefore, there is an effect that it is possible to achieve miniaturization.

[Brief explanation of the drawing]

1 to 4 are explanatory diagrams showing the steps of an embodiment of the present invention, FIG. 5 is a cross-sectional view of a rotor manufactured according to the present invention, and FIGS. A sectional view showing an example in which a pulley is attached to the rotor shown in the figure, and FIGS. 7(a) and 7(b) are sectional views of a rotor manufactured by a conventional manufacturing method, respectively. DESCRIPTION OF SYMBOLS 1... Metal disk, 3... Outer cylindrical part 4... Inner cylindrical part, 5... Bottom plate 6... Rotor board, 7... Bottom plate support surface 8... Inner cylindrical part support Part, 9... Clamper lO... Opening end contact surface, 12... Clamper 13... Roll die patent applicant Japan Isneed Co., Ltd.

Claims (1)

[Claims] A cylindrical part is formed by squeezing out the outer periphery and center part of a metal disk in one direction by pressing or spinning, the outer cylindrical part is used as a belt hanging part, the inner cylindrical part is used as a bearing member fitting part, and the bottom plate is used as a clutch part. form a rotor substrate,
The rotor board is brought into contact with the bottom plate which becomes the clutch part, and by a clamper which contacts the inner peripheral surface of the inner cylindrical part which becomes the bearing member fitting part, and a clamper which contacts the open end of the outer cylindrical part which becomes the belt hanging part. After clamping from both sides, a roll die is pressed against the outer peripheral surface of the outer cylindrical part and rotated to tighten the outer cylindrical part, which will become the latch part.Without changing the outer diameter of the bottom plate, the bottom plate will become the re-clutch part. A method for manufacturing an electromagnetic clutch rotor formed to have a smaller diameter than the outer diameter of the rotor.