JPS6188936A - Manufacturing method of sheet metal poly V pulley - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of manufacturing a poly-V pulley by plastic working using a sheet metal material as a raw material.

(Prior art) In the production of sheet metal and poly V pulleys, a cylinder with a bottom is formed by Cyn processing of a metal material, and a V peak is formed on the outer peripheral surface of the cylindrical portion of the cylinder with a bottom. However, it is well known that in this case, from the point of view of weight reduction, it is possible to use a sheet metal material with the minimum thickness that is permissible in terms of strength.
desirable. However, if the thickness is too thick or too small, the mounds cannot be formed by rolling. In order to solve this problem, a method has been proposed in which the thickness of the cylindrical portion is increased, and a V-mountain is formed at the increased thickness by rolling, but this method requires many steps to increase the thickness. Requires. Also, please
After forming V-mountain on the cylindrical part, V-I is formed in an appropriate process.
Is there any known method for finishing a JV pulley, or is there any known method that allows a large number of V-mounts to be shaped Fk in a simple manner.

(Problems to be Solved by the Invention) Therefore, the present invention provides a method for manufacturing a poly V pulley made of sheet metal.
It is possible to simply form a large V-mountain on the cylindrical portion of the bottomed cylinder without increasing the thickness of the cylindrical portion,
The problem is to eliminate the drawbacks of the prior art as mentioned above.

(Means to Solve the Problem) In order to solve this problem, according to this research, a cylinder with a bottom that does not have a V-shaped peak is formed at the 111th part of the circle by compositing the conjugated material, and Do//i? V 47; An outer part that contacts the entire outer circumferential surface of the cylindrical part of the bottomed cylinder with a pointed top, and an inner part that contacts the entire circumferential surface of the cylindrical part of the bottomed cylinder with a nu. While restraining the FIjJ cylinder part between the mold and the m1 cylinder part, press it in the direction of the 111il pattern.
1), then transfer the material into the outer mold of the lil groove (1), and by doing so, remove one V peak formed in the n'l groove. A cylinder with a bottom is formed in the cylindrical portion, and then a cylinder with a bottom having seven V ridges in the cylindrical portion is formed from a bottom opening without V ridges in the cylindrical portion. A bottomed cylinder having one V ridge on the cylindrical portion is formed from a bottomed cylinder having 7 Vll and 1 on the @ portion, and this method is repeated as necessary to form a large number of V ridges on the cylindrical portion. A method for manufacturing a poly-V pulley made of sheet metal is provided, which comprises forming a rounded cylinder and forming a poly-V pulley from this bottomed cylinder.

(Function) According to the present invention, the outer circumferential surface and the inner circumferential surface of the cylindrical portion of the cylinder with a base are simply restrained by the outer and outer molds, respectively, and then this circle fm portion is compressed in the diagonal direction. V-mountains can be formed on the cylindrical part by a very simple process called 1-1-6. Also, by simply repeating this process, a large number of V-mountains can be formed in the cylindrical part. (Implementation) The main features of this invention will be described below with reference to page 1.

FIG. 9 shows a bottomed cylinder IO formed from U gold material by machining. This eagle processing is generally widely practiced and well known. According to this invention, 24
By using the bottomed cylinder IO shown in the figure as a raw material and compressing it in the axis direction with a special mold, a bottom having a V peak of 7Q below the circle fD]Rli is formed as shown in FIG. A cylinder with a circle is formed. Then, in a similar manner, l
From the bottomed cylinder SO of FIG. S, which has the opposite crest V, is formed the bottomed cylinder 21 of FIG. Repeating the same method.

From the cylinder with a bottom shown in FIG. 6, the cylinder with a bottom shown in FIG.
is formed, and the 7th +g+ bottomed cylindrical tube is additionally formed with the 7th and fth V-mount μ, as shown in FIG. 8. The gist of the present invention is to form V peaks one by one in this way, and a U-(+j circular segment, for example, the bottomed cylinder shown in FIG. ,
From 23, a poly-V pulley is formed in a known manner.

The m1 diagram uses the bottomed cylinder io of Figure 9, UL, which does not have a V peak in the cylinder part, as a material, and from this, forms the bottomed cylinder 20 of the US diagram, which has a V peak / on the east of the cylinder part. This shows the 71° construction of the mold.

Before starting processing using this mold, the entire upper mold is located at the top dead center of the press, and therefore the mold is wide open. In the center of the male mold 5 supported by the cushion bin g, there is a spring-out 6, which is separated upward from the upper mold, so that a strong spring is applied. 70 and projects upwardly from the male mold 5 to its uppermost position 16'.

When starting machining aiI, the bottomed cylinder IO is pushed out +J5□i, and at this time, the bottomed cylinder io=
, so that its bottom part is supported by an overhang and its cylindrical part extends downwardly from the bottom part.

Next, the press is activated and the upper die is lowered.
;? As shown in the right half of /H, the bottomed cylinder IO
The bottom part of the holder can now be pushed out between the protrusion A and the press die 9. In addition to this, the solid part of the bottomed circle 1J11O is surrounded by a ring shape from this part, which is made up of many segments separated from each other by its radius,
At position 1 shown in the right half of Fig. The pot // has a ratio of 4〉H, and the inner surface of the six-ring shape // has a large diameter, and these split υ-shaped segments touch each other; A hollow that makes up a V-groove of 1g! 9 is formed.

When the upper mold is lowered, the split mold /l becomes the lower mold /, 2
The tapered hole formed in the upper part is inserted into the tapered hole, and by contact with this tapered hole, the split-shaped segments resist the action of the spring that holds them apart from each other. Then, they approach each other, and the diameter of the split mold l/ becomes smaller by:゛i. When the bottom surface of the split p-type // comes into contact with the bottom surface of the tapered hole, the segments of the split p-type // contact each other and the diameter of this split p-type becomes the minimum.

When inserting the split mold// into the taper hole of the lower WM like this, and at P1, the lower pH of the push mold gets lost.

As a result, the bottomed cylinder 10 and the protrusion O are also lowered, and the protrusion O comes to be included in the male mold S, and the cylindrical part of the bottom cylinder 10 has the shape No.3 type 5. Descend to a surrounding position.

At this point, the inner mold, the male mold 5, has a bottomed circle i'f
The split type /l that substantially contacts the entire inner circumferential surface of the cylindrical part at t+10 and has the smallest diameter, which is the type of external force, is Kuhomi 19
The cylindrical part is in actual contact with the entire outer circumferential surface of the cylindrical part of the bottomed cylinder IO, except for the V id / g that goes around once and is formed by the inner mold 5 and the outer mold / g. / be restrained between.

When the upper mold is lowered in the direction of σ, the pressing mold is lowered, and thereby the JaWS is also lowered while pressing down the cushion pin g. At this time, the upper surface of the split mold 1/ is pressed down by a strong spring LD placed above the split mold holder 15, so that the cylindrical portion of the bottomed cylinder IO is pushed inward. Male type S which is the type of , and Warishi type ll which is the outer type
continues to be restrained between Further, the lower end of the cylindrical portion is attached to the bottom of the hole of the lower die 12 and lies at vl, but the upper end thereof is pushed downward by the pressing die, so that the cylindrical portion is compressed in the el+h direction. Due to this compression, the material in this cylindrical portion is reduced to vr1'1, which is the only material escape.
'I.

into 7g; i B', 'r L,, thus, as shown in the left half of Fig. 1, the cylindrical part has a v-mount l formed in Vωfig. , the bottomed cylinder 20 of the drawing S is formed.

Figures ♀ and 2 are from the cylinder with the bottom in Figure S, which has one V-crest on the cylindrical part, to the bottom of Figure η'6, which has two V-crests l1.2 in the 1st part of the solar eclipse. A mold for forming a circle 1,1yλ/ is illustrated. In this mold, in addition to the 7-turning V i4+';: /g-forming hole/9 on the inner surface of the split mold //, another 7-turning V is also formed. Kuhomiko 5 is formed. Harutoshi type // inner V
/(7g is V
The outside of the cylindrical part of the L-shaped cylinder 20 having a mountain /
tl", -B3f so that it can be brought into actual external contact with j, and another Vif+2 is made into this by transferring the material rj1 and forming the bottomed cylindrical part / in Fig. 6. It is a useless thing that forms V mountain 2. Except for the above-mentioned points, the 281st gold m ゛
2b is equivalent to 7i et al.

・Additional figure 3 shows three V-mounts on the cylindrical part. ．． From the bottomed cylinder of the seventh tol having 3, there is a V mountain i, 2. , y, and a mold for forming the bottomed cylinder 23 of FIG. This mold has a v-groove/g that goes around seven times on the inner surface of the mold.

Kuhomi who makes fL 2 da, 26 and 27 respectively/9
．． ．． 2S, , 1g and 2q are formed.

(Effect of the invention) Since this invention is configured as described above, the
A cylinder with a bottom that has many V peaks on the cylindrical part to form a V pulley is different from a cylinder with a J bar 4 that does not have V peaks in the cylindrical part. ! 1 death・
It is formed by repeating the process of pressing 1 on the surface of the V ridge a certain number of times depending on the number of V ridges, and the cost of this work is low, and the cost of processing and turning necessary for the work is low. A cylinder with a bottom that is inexpensive and has many V ridges can be processed very easily regardless of the number of ridges.

IX...Jl't explanation of the 1ζ plane; i'lL / The figure shows the bottom of a cylinder with one V-crest on the cylindrical part, from a simple cylinder without 7" V-crests on the cylindrical part, according to the present invention. Fig. 3 is a longitudinal 1tJi side view of a mold for forming a cylinder with a cylindrical part. From the bottomed circle ('; 5k forming mold, and the bottomed circle fa that makes 3 VILI on the cylindrical part, find 4 on the cylindrical part. A mold for forming a bottomed cylinder having an opening is shown in FIG.
Figures 7 and S show a bottomed cylinder with no V ridges on the cylindrical portion, a bottomed cylinder with seven V ridges on the cylindrical portion, and a bottomed cylinder with two V ridges on the cylindrical portion, formed according to the present invention. b)' is a front view.

In the drawings, /, 2. ,? and q is a V-mount, 5 is an inner mold, wo is a cylindrical part on the pressure side; (Z) type, 10 is a bottomed cylinder with no V-mount on the Fe cylinder part, l/ is an outer mold, 7. 2
is a mold that supports the end of the cylindrical part when it is heated, 1g
is VN, is -2Q is a cylinder with a bottom that has 7 adjacent V ridges on the cylindrical part, 2/ is a cylinder with a bottom that has double the 2 V ridges on the cylindrical part,; a base circle r word with,
-3 is the same station with a bottom with a V-mountain on the cylindrical part, 7!
Da, -6 and -ri indicate ViR mer.

Figure 1 Figure 2

Claims (1)

[Claims] By drawing a sheet metal material, a bottomed cylinder having no V-ridges is formed in the cylindrical part, and an outer part that substantially contacts the entire outer circumferential surface of the cylindrical part of the bottomed cylinder except for one V groove that goes around once. The cylindrical portion is compressed in the axial direction while the cylindrical portion is restrained between one die and an inner die substantially in contact with the entire inner circumferential surface of the cylindrical portion. is moved into the groove of the outer mold, thereby forming a bottomed cylinder having a single V peak formed in the groove in the cylindrical part, and then forming a V in the cylindrical part. In the same way as forming a cylinder with a bottom with one V-ridge on the cylindrical portion from a cylinder with a bottom without a ridge, two grooves are formed on the cylindrical portion from a cylinder with a bottom with one V-ridge on the cylindrical portion. Forming a bottomed cylinder having V peaks, repeating this method as necessary to form a bottomed cylinder having a large number of V peaks in the cylindrical portion, and forming a poly V pulley from this bottomed cylinder. A manufacturing method of a poly V pulley made of sheet metal.