JPS58148039A - Manufacturing device of multiple thread v-pulley - Google Patents

Abstract

PURPOSE:To obtain a titled device small in size and able to obtain durable products by supporting the inner face of a tabular material indented by a rolling die having jagged part by a supporting member having a pressure receiving part on which a concavity is formed. CONSTITUTION:In a device that manufactures a multiple thread V-pulley by thrusting a rolling die 1 having convex stripes 1a and concave stripes 1b to a tabular material 5 held and rotated between a supporting member 3 provided with a pressure receiving jig 9 and a rotary pushing shaft 13 having a receiving die 13a, and forming V-grooves on the surface 5a of the material 5, a concavity having phase difference of half pitch to the concave stripes of the rolling die 1 is provided in the roll-shaped pressure receiving jig 9 to form a relief part 11 for excess metal 5d generated on the inner face 5c of the material 5 at the time of formation of V-grooves 5b. Consequently, force applied to the rotary pushing shaft 13 becomes small, and miniaturizing of the device becomes possible. Further, no forced deformation occurs in the material 5, and durability is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manufacturing apparatus for forming grooves of a V-pulley having multiple grooves, for example.

As a conventional manufacturing device for this type of multi-thread V pulley, the first
There is something like the one shown in the figure. This device has 1l105b on the surface 105a of a plate material 105 formed into a cup shape.
and the inner surface 105c of the material.
It has a roll-shaped pressure receiving jig 109 that supports the. During molding, the cup-shaped material 105 is fitted into the pressure-receiving jig 109, and the i+
The rotary mold 113 is brought into close contact with the material 105 so that the bottom part 106 is sandwiched between the parts 4105 and the bottom part 106. Next, while forcing the pressure receiving jig 109 to rotate, the roll die 101 is pushed into the surface 105a of the material 105 to a predetermined dimension.

However, in such a device, since the surface 109a of the pressure receiving jig 109 is flat, when the roll die 101 is pushed into the surface 105a of the material 105,
All of the excess thickness of the material 105 is built up outward from the material surface 105a shown by the chain line in FIG. 1 in the radial direction (up and down direction in FIG. 1). For this reason, the roll die 101
This requires an excessive pushing force, resulting in an increase in the size of the device.

Furthermore, when the roll die 101 is pushed in, the material 105 is strongly pressed between the ridges of the roll die 1010 and the surface 109a of the pressure-receiving jig 109, so that the flow of the material 105 is likely to be cut. This impeded the durability of the product.

Furthermore, when pressing with the roll die 101, the material 1
05 tends to escape in the axial direction along the surface 109a of the pressure receiving jig 109, and in order to prevent this, the rotary press die 11
3 had to have an excessive supporting force, which led to an increase in the size of the device.

This invention was devised in view of the various problems mentioned above, and provides a multi-thread V pulley manufacturing device that can downsize the device and produce a durable product. It is.

In order to achieve this object, the present invention provides a rolling die having an uneven portion for forming grooves on the surface of a plate-shaped material, and a rolling die that forms grooves on the surface of the material, and when the surface of the material is press-formed by the rolling die, the inner surface of the material is A rolling device having a support member having a supporting pressure receiving part, wherein a plurality of recesses having a phase difference of half a pitch with respect to the recess of the rolling die are formed in the pressure receiving part of the support member. be.

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings.

As shown in FIG. 2, the device for manufacturing multi-striped boobies consists of a rolling die 1 and a support member 3. The rolling die 1 forms a V-groove 5b on the surface 5a of a plate material 5. It is molded into a roll shape, and has a plurality of convex stripes 1a on the outer periphery.
and concave portions 1b are alternately formed at a constant pitch.

The support member 3 is constructed by integrally molding a roll-shaped pressure receiving jig 9 concentrically with the tip of a ring-shaped base member 7.

This pressure-receiving jig 9 is formed into a plate-like material 5 by the rolling die 1.
When pressing the surface 5a of the material 5, the inner surface 5C of the material 5
As shown in FIG. 3, the pressure receiving jig 9 has a plurality of four parts, in other words, a plurality of relief parts 11 formed in the circumferential direction. The relief portions 11 are formed in the shape of a groove, and the mutual spacing is the same at a position having a phase difference of half a pitch with respect to the pitch of the groove portions 1a of the rolling die 1. The width B of the relief portion 11 is the width B of the relief portion 11
The thickness of the plate is approximately equal to that of the plate. The relief portion 11 has sloped surfaces 11a and 11b formed in a portion that enters the pressure receiving jig 9 in the radial direction, and these sloped surfaces 118.11
b intersect with each other at the center in the width direction (horizontal direction in FIG. 3) to form a bottom portion 11c. This inclined surface 11a
, 11b are the angles formed by the ridges 8 of the rolling die 1.
It is formed larger than the apex angle of I11a. The depth Ω of the relief part 11 is formed so that it can sufficiently absorb the amount of excess thickness 5d of the material 5 that is released into the relief part 11, and the bottom part 11C has an allowance so that it can absorb variations in the thickness of the material. A lid is formed. 13 in Figure 2 is material 5
The rotary die 13 is a rotary die 13 that presses the bottom part 6 of the plate-like material 5 with the same core 13a, and the die 13b that presses the receiving die 13a with the support member 3 and the same core. and a bearing 13c interposed between the receiving mold 13a and the pressing mold 13b. Pressure receiving jig 9, plate-shaped material 5, and receiving mold 13a
is eccentric by a dimension slightly larger than the depth Ω of the above-mentioned relief portion 11.

In this case, the extra thickness 5d of the inner surface 5C of the plate-shaped material 5 is received by the RF jig 9.
It expands into the relief part 11 of the plate material (multi-threaded V
This is to enable the pulley to be easily removed from the pressure receiving jig 9.

Next, a method for manufacturing a multi-thread V pulley manufactured by the above-mentioned apparatus will be described.

The plate-shaped material 5 is drawn into a cup shape in advance. This plate-shaped material 5 is fitted into the pressure receiving jig 9 of the support member 3. Next, a rotating mold 13 is brought into close contact with the bottom part 6 of the plate-shaped material 5 from the outside. The pressure-receiving jig 9, rotary mold 13, and plate-shaped material 5 are forcibly rotated, and the rolling die 1 is pushed into the surface 5a of the plate-shaped material 5 to a predetermined dimension. Thus rolling die 1
When the material 5 is pushed in, the surface 5a of the material 5 that the convex portion 1a of the rolling die 1 contacts is recessed inward in the radial direction, and the inner surface 5C is pushed out. The excess thickness 5d of the material 5 pushed out toward the inner surface 5C in this way is released into the relief portion 11. At this time, there is a thickness difference in the material 5 that occurs during drawing, and the 8 relief parts 11
Even if the portions of the extra meat 5d to be released inward are different, the extra meat 5d can be sufficiently released by the extra portion 11d of the relief portion 11. However, in the concave portion 1b of the rolling die 1, some of the material 5 may be partially removed. It is applied to an external force in the radial direction. In this way, a plurality of grooves 5b are formed on the surface 5a of the material 5.

Note that this invention is not limited to the above embodiments. For example, in the above embodiment, the rolling die 1 does not have to be a groove, and may be applied to grooves of other shapes by selecting the shape of the rolling die. The allowance portion 11d of the relief portion 11 does not necessarily need to be provided.

As described above, this invention includes a rolling die for forming grooves on the surface of a plate-shaped material, and a support member equipped with a pressure receiving part that supports the inner surface of the material when the surface of the material is press-formed by the rolling die. In the rolling device, a plurality of recesses having a phase difference of half a pitch with respect to the recesses of the rolling die are formed in the pressure receiving part of the support member, so that the surface of the material is pushed by the rolling die. When this happens, the meat of the material can escape into the recess of the pressure-receiving portion of the support member and be pushed out toward the inner surface of the material. For this reason, the resistance is much lower than when all the material is piled up toward the surface, and the pushing force of the rolling die can be significantly reduced. Also, since the material's flesh gets into the relief part, it is less likely to escape along the pressure receiving jig.

The force that prevents this escape can be reduced. Therefore, the overall size of the device can be reduced.

The excess material pushed out toward the inner surface of the material by the rolling die escapes into the recess of the pressure-receiving part and does not receive too much pressing force from the rolling die, so 70-- is not cut.

Therefore, the durability of the product can be improved.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted side view showing a conventional rolling device, Fig. 2 is a partially omitted side view showing a rolling device with this invention, and Fig. 3 is an enlarged sectional view of the main parts. . 1... Rolling die 3... Support member 5...
Plate material 5a...Surface 5b...Groove
5C...Inner surface 5d...Excess meat 9
... Pressure receiving jig 11 ... Concave portion Patent applicant Fuji Kiko Co., Ltd. Fig. 1 ILF) Q 1090 Fig. 2 Fig. 3

Claims (1)

[Claims] A rolling die having a concavo-convex portion for forming grooves on the surface of a plate-shaped material, and a support member equipped with a pressure-receiving portion that supports the inner surface of the material when the surface of the material is press-formed by the rolling die. 1. An apparatus for manufacturing a multi-thread V pulley, characterized in that a plurality of recesses having a phase difference of half a pitch with respect to the recesses of the rolling die are formed in the pressure receiving part of the support member.