WO1994009928A1

WO1994009928A1 - Method of manufacturing poly-v-grooved pulley of sheet metal

Info

Publication number: WO1994009928A1
Application number: PCT/JP1992/001423
Authority: WO
Inventors: Toshiaki Kanemitsu; Kazuyuki Oda; Yasuhiro Takahashi
Original assignee: Kabushiki Kaisha Kanemitsu
Priority date: 1992-11-02
Filing date: 1992-11-02
Publication date: 1994-05-11

Abstract

Disclosed in this invention is a method of manufacturing poly-V-grooved pulleys readily made of sheet metal, in which said pulley is manufactured through such steps that: a slotting roller (2) is pressed to the outer periphery of a disk-like metallic material (1) for applying slotting to said material (1) in the direction of the thickness thereof so that circumferential walls (7) different from each other in facing direction for providing a poly-V-groove and other peripheral wall (8) onto which the other member fits may be formed; shaping rolls (10, 12) are pressed to the outer peripheral surface of said poly-V-grooved walls (7) for formation of poly-V-groove (11B) with rolling shaping and providing a poly-V-grooved pulley made of sheet metal; whereby, despite the use of only single pulley, applications adaptable to engagement with a plurality of V belts is made available and, with a poly-V-grooved pulley fitted on the peripheral wall (8) for fixation of other members through a cushion rubber to that direct transmission of vibration of a rotating axis to the fitted poly-V-grooved pulley may be prevented.

Description

Description Method of manufacturing sheet metal poly-V pool

The present invention transmits torque from a drive shaft, such as a crankshaft of an automobile engine, to a power steering pump, air compressor, alternator, wall pump, etc. The present invention relates to a method of manufacturing a sheet metal poly-V pulley used in such a case.

'' Technique i l

As a method of manufacturing a sheet metal poly-V pulley in which a poly-V groove is formed on the outer peripheral surface of a cylindrical rim portion formed by plastically processing a disk-shaped metal material, Japanese Patent Application Laid-Open No. There is a manufacturing method disclosed in Japanese Patent Application Publication No. In this manufacturing method, the outer peripheral edge of a disk-shaped metal material is slit and divided in the thickness direction of the material to form a cylindrical rim portion, and the entire outer peripheral surface of the cylindrical rim portion is formed. The V-shaped groove is roll-formed by pressing a multi-mountain-shaped forming hole on the roller.

However, the sheet metal poly-V pulleys manufactured as described above can only engage with one poly-V belt.

Therefore, for example, in the case of a car, for example, the rotational power of the drive shaft, such as the crankshaft of an engine, is transmitted to multiple locations, such as a pump for power steering and a compressor for an air compressor. The pools separately In addition to the large number of assembly steps, there was also a large loss in space.

According to the present invention, a plurality of poly belts can be engaged with each other while adopting the manufacturing method of dividing the outer peripheral edge of the metal material as described above, and the vibration of the driving rotary shaft is one side. It can be used in a state where it is prevented from being transmitted from one poly-V groove to the other poly-V groove, and is also easy to manufacture. It aims to provide a method. DISCLOSURE OF THE INVENTION.

In order to achieve the above object, a method of manufacturing a sheet metal poly-V bully according to the present invention comprises pressing a slotted roll against an outer peripheral edge of a disk-shaped metal material, and sliding the material in the thickness direction thereof. Splitting and forming a peripheral wall for forming a poly-V groove and a peripheral wall to which another member is to be fitted in different directions;

And forming a poly-V groove by pressing a multi-row mountain-shaped forming nozzle against the outer peripheral surface of the peripheral wall for forming the poly-V groove.

According to such a method for manufacturing a sheet metal poly-V pulley according to the present invention, simple and few steps such as pressing a slotted roll against a disk-shaped metal material and pressing a multi-row mountain-shaped forming roll can be achieved. In addition, it is possible to easily and efficiently manufacture a sheet metal poly-V pulley having a peripheral wall having a poly-V groove formed on the outer peripheral surface thereof and a peripheral wall to which another member having a flat outer peripheral surface is fitted. . Moreover, by attaching a separate sheet metal poly-V pulley to the manufactured peripheral wall to which another member is to be fitted, for example, via an annular cushion rubber. Multiple pulleys can be formed in one pulley, and the rotational force of the drive rotary shaft can be transmitted to multiple locations via multiple pulleys while using a single pulley. However, it is possible to obtain an effective usage form in terms of space. In addition, in the use mode in which the rotational force is transmitted to the plurality of locations, the vibration of the drive rotary shaft is directly transmitted to the poly-V pulley fitted to the peripheral wall to which the other member is fitted through the annular cushion rubber. It is easy to avoid telling

-While it is possible to transmit the rotational force to a plurality of points while transmitting the rotational force from the hole to the plurality of points, it is possible to smoothly transmit the rotational force to the plurality of points. The disk-shaped metal material is slit at the center of the thickness of the disk-shaped metal material so that the axial length of the disk-shaped metal material is substantially the same as that of the peripheral wall to which the other member is fitted. The rotational force of the drive rotary shaft is transmitted to a plurality of locations by the poly V-grooves formed in the V-shape and the poly-V-belts respectively engaged with another poly-V pulley fitted to the peripheral wall to which the other member is fitted. Sometimes, the force acting on the pulley is received by the web formed between the two peripheral walls, preventing uneven rotation and momentum, increasing the strength of the pulley as a whole, and improving its durability. The property can be sufficiently secured.

In the above-mentioned manufacturing method, in the roll forming step of the poly-V groove, an end of the peripheral wall for forming the poly-V groove in which the poly-V groove is formed in the axial direction has a diameter larger than that of the other peaks. While the other end has the same diameter as the other ridges and the outer diameter of the surface of the web portion on the side of the peripheral wall for forming the poly V groove. To form a thick ridge in the axial direction on the extension of Thus, not only can the belt engaged with the poly-V groove be prevented from being released to the side of the pulley, but also the side of the poly-V groove forming peripheral wall that is connected to the peripheral wall to which another member is fitted. Since the ears are not formed at the end portions, only thick ridges having the same diameter as the other ridges are formed. And the molding time can be shortened. Moreover, since the ridge formed at the end portion on the side connected to the peripheral wall to which the other member is fitted is thick in the axial direction as described above, the strength of the portion where stress is most concentrated in the usage mode is used. The height of the pulley can be kept high to prevent it from being cracked and deformed or damaged during use, further improving the durability of the pulley as a whole.

FIG. 1 is a schematic plan view for explaining a positional relationship of rolls for forming a peripheral wall in the method for producing a sheet metal poly-V bully according to the present invention.

FIG. 2A and FIG. 2B are cross-sectional views of main parts for describing a slitting step and an expanding step.

FIG. 3 is a cross-sectional view of a main part for describing preforming in the step of forming a poly-V groove.

FIG. 4 is a cross-sectional view of a main part for describing finish forming in the step of forming a poly-V groove.

Fig. 5 is a longitudinal sectional view of the manufactured sheet metal poly-V pulley.

FIG. 6 is an enlarged longitudinal sectional view of a main part of the manufactured sheet metal poly-V pulley. FIG. 7 is a longitudinal sectional view showing an example of use of the manufactured sheet metal poly-V pulley.

FIG. 8 is a longitudinal sectional view showing another example of use of the manufactured sheet metal poly-V pulley.

FIG. 9 is a longitudinal sectional view of a sheet metal poly-V pulley manufactured by another manufacturing method.

FIG. 10 is a longitudinal sectional view showing an example of use of a sheet metal poly-V pulley manufactured by another manufacturing method. BEST MODE FOR CARRYING OUT THE INVENTION

First, an embodiment of a method of manufacturing a sheet metal poly-V pulley according to the present invention will be described with reference to the drawings. In this embodiment, a circular V-shaped pulley having an outer diameter d of about 160 to 180 mm is formed using a circular plate-shaped metal material having a thickness t of about 6 mm. explain.

As shown in Fig. 1, the radially opposed portion of the disk-shaped metal material 1 having a cylindrical boss 1a formed at the center by a pre-pressing process, As shown in Fig. 2, a slotted roll 2 having a wedge-shaped blade 2a at a substantially central portion of the outer peripheral surface and a substantially trapezoidal expanded portion on the outer peripheral surface as shown in -Fig. 3a, and an expansion molding roll 3 provided with a recess 3b for forming a lug on one end of the expansion portion 3a, each of which independently moves in the radial direction. Arrange as possible.

Next, as shown in FIG. 2A, a rotary lower die 4 having a projection 4a that fits into the cylindrical boss portion 1a of the disk-shaped metallic material 1 and protrudes upward, and Externally fit to the projection of 4a of the lower mold 4 The disc-shaped metal material 1 is sandwiched and held from both sides in the axial direction by the rotating upper die 5 having the concave portion 5a. In this state, first the slotted roll 2 as shown by an arrow F i _g. 1, is moved in the direction toward the disk-like metal blank 1, a disc-shaped blade portion 2 a of the wedge By rotating the slitting roll 2 and the disk-shaped metal material 1 synchronously while pressing against the outer peripheral edge 1 e of the metal material 1, the disk-shaped metal material 1 is moved in the thickness direction. By slitting, a substantially V-shaped slot 6 is formed.

Then, the slitting roll 2 is retracted in the direction of the arrow XI of Fig. 1 and the spread molding roll 3 is moved in the direction of the arrow Y of Fig. 1, and the expanded portion 3a is moved to the position shown in FIG. 2 As shown in B, the slit groove 6 is expanded vertically by pressing it against the corresponding slot 6 of the rotating disk-shaped metal material 1, and the rib 1 A At the same time, the peripheral wall 7 for forming the poly-V groove and the peripheral wall 8 to which another member is to be fitted are formed in different directions from each other at the same time, and at the same time, the ear 9 is formed by a recess 3b at one axial end of the peripheral wall 7 for forming the poly-V groove. To form

Subsequently, as shown in Fig. 3, the outer peripheral surface has an axial length equal to the axial length of the peripheral walls 7 and 8 and extends over almost half the length of the outer peripheral surface. A first preforming roll 10 having a shallow multi-concave convex portion 10 a and an ear fitting portion 1 Ob forming the ear 9 more precisely by fitting the ear 9 with the ear 9. By pressing against both the peripheral walls 7 and 8 of the disk-shaped metal material 1, a shallow poly-V groove 11 A is roll-formed on the outer peripheral surface of the poly-V groove forming peripheral wall 7, and other members are fitted. Wear outer wall 8 Flatten.

Subsequently, although not shown, in order to finish the poly-V groove more precisely than the above-mentioned first pre-forming roll 10 for forming the poly-V groove, the multi-row uneven portion and the above-mentioned ear fitting portion are formed. The second preforming roll having the same shape as above is pressed against both the peripheral walls 7 and 8 of the disk-shaped metallic material 1 to form a more precise poly V on the outer peripheral surface of the poly V groove forming peripheral wall 7. Roll forming the groove.

Finally, as shown in FIG. 4, the finish forming roll 12 having the multi-slotted portions 12 a and the ear fitting portions 12 b is connected to both the peripheral walls 7, 7 8 to form a poly-V groove 11 B with a predetermined depth and width and a lug 9 to form a sheet metal poly-V pulley 13 as shown in Fig. 5 I do.

By the way, in the roll forming process of the poly V groove in the manufacturing process of the sheet metal poly V pulley 13 as described above, in the axial direction of the poly V groove forming peripheral wall 7 on which the poly V groove 11 B is formed. As shown in the enlarged view of FIG. 6, a lug 11 e projecting radially outward from the other ridges 1 lm is formed at the end of the lug 11. Prevents the poly-V belt engaged with the poly-V groove 11 B from being detached to the side of the pulley, while preventing the poly-V groove forming peripheral wall 7 from moving in the axial direction. The other end has the same diameter as the other peak 11 m, and extends along a line extending outward from the diameter of the surface 1 AA of the web 1 A on the side of the peripheral wall 7 for forming the poly V groove. A thick peak 11n is formed in the axial direction. Therefore, as compared with the case where the lugs are formed at both ends, the roll forming is easier and the forming time can be shortened. Moreover, the ridge 11n formed at the end portion on the side connected to the peripheral wall 8 to which the other member is fitted is thick in the axial direction, and the distance L and ^ of this connected portion is large. Therefore, the strength of the part where stress is most concentrated in the usage mode is kept high, and it is possible to prevent the part from being cracked during use and being deformed or damaged, and to improve the durability of the entire pulley It can be maintained sufficiently.

As shown in Fig. 7, a ring-shaped rubber cushion 14 is attached to the flat peripheral wall 8 of the sheet metal poly-V pulley 13 manufactured as described above for fitting with another member. Is press-fitted, baked, or fitted via a bonding agent, and a large-diameter poly-V pulley 15 manufactured separately is attached to the outside of the ring-shaped rubber cushion 14. It is possible to form two poly V-grooves 11 B and 15 B in one pulley by fitting and fixing the boss 1 a to the crankshaft of the engine. Only a single bully is used by engaging the Poly V-belts with the two Poly V-grooves 11B and 15B, respectively, while fitting and fixing to the drive rotary shaft. The rotational force is applied to two passive parts, for example, a pump for power steering and a compressor for air conditioner. It can be used and the child is to us.

In such a usage mode, the vibration of the drive rotary shaft, which is likely to be generated in the crankshaft or the like, is absorbed by the rubber cushion 14 so that the poly-V grooves 11B and 1 It can be used to prevent the mutual interaction of vibrations between the 5Bs and to always provide a smooth and quiet rotational force transmission function.

In addition, the sheet metal poly-V pulley 13 manufactured as above As another example of use, as shown in FIG. 8, the peripheral wall of a sheet metal poly-V pulley 17 which is rotatably fitted to and supported by a boss 1a via a bearing 16 as shown in FIG. It is conceivable that a rubber cushion 18 is interposed between the peripheral wall 8 to which another member is to be fitted and the vibration between the rotating shaft and the sheet metal poly pulley 17 is absorbed.

As shown in FIG. 9, roll forming is performed such that the uneven portion 11 is formed on the inner peripheral surface of the poly V groove forming peripheral wall 7 on which the poly V groove 11 B is formed. In this case, too, as shown in FIG. 10, a large-diameter poly-V pulley 15 manufactured separately through a ring-shaped rubber cushion 14 on the peripheral wall 8 to which another member is fitted. Can be used to transmit rotational force from a single pulley to two passive parts as above.

Industrial applicability

As described above, the method of manufacturing a sheet metal poly-V pulley according to the present invention is to form a poly-V groove having different directions by dividing the outer peripheral edge of a disk-shaped metal material in the thickness direction thereof. A technology to form a peripheral wall for fitting other members and a peripheral wall for fitting other members, and to form a poly V groove on the outer peripheral surface of the peripheral wall for forming the poly V groove. It can not only transmit torque to a plurality of locations, such as a pump for air steering and a compressor for air conditioners, but also transmit the torque from the drive shaft such as a shaft to the vibration of the shaft. It can be used to transmit smoothly and quietly without any effect. It can be easily manufactured with few steps and with good productivity.

Claims

1 Claims

(1) A slitting roll is pressed against the outer peripheral edge of the disk-shaped metal material, and the material is slit in the thickness direction of the material, and the peripheral wall for forming the poly-V groove and the other members having different directions from each other. Forming a fitting peripheral wall;

And forming a poly-V groove by rolling a multi-row mountain-shaped forming roll against the outer peripheral surface of the poly-V groove forming peripheral wall.

(2) The disc-shaped metal material is slit at the center of its thickness so that the axial length of the peripheral wall for forming the poly-V groove and the peripheral wall to which another member is fitted are substantially the same. A method for manufacturing a sheet metal poly-V pulley according to claim 1.

(3) In the roll forming step of the poly-V groove, at the axial end of the poly-V groove forming peripheral wall on which the poly-V groove is to be formed, a lug projecting radially outward from other peaks. On the other end, the other end has the same diameter as the other ridges, and extends along a line extending outward from the diameter of the surface of the ridge portion on the side of the peripheral wall for forming the poly V groove. 2. The method for manufacturing a sheet metal poly-V pulley according to claim 1, wherein a thick ridge is formed in the axial direction.