JPS58212830A - Manufacturing device of multi-grooved v-pulley made of thin plate - Google Patents

Abstract

PURPOSE:To manufacture a multi-grooved V-pulley made of thin plate having sufficiently reinforced multiple V-groove by applying axial compressive force to the peripheral wall of a cup-shaped preliminarily formed product and making the holding distance of an outer rotation shape keeping member gradually greater. CONSTITUTION:An inner rotation shape keeping member 12 is covered by a cup- shaped preliminarily formed product 3, and supported by upper and lower rotary supporting members 29, 9 from both ends in axial direction. One point of circumferential direction of lower half part and upper half part of peripheral wall of the formed product 3 is held from inside and outside by an inner rotation shape keeping member 12 and outer rotation shape keeping members 48, 49. The preliminarily formed product 3 is rotated in a body with supporting members 9, 29. The distance between supporting members 9, 29 is narrowed slowly, and at the same time, shape keeping members 48, 49 are retreated slowly. Accordingly, the peripheral wall of the product 3 is thickened without deformation. After thickening, it is rotated in a body with supporting members 29, 9. A V-groove forming member is advanced slowly, and plural V-grooves are cut on the outer face of peripheral wall to complete a multi-grooved V-pulley made of thin plate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing an IJV pulley made of sheet metal.

In recent years, so-called so-called grooves are formed by carving small ζ grooves in multiple stages on the outer surface of the peripheral wall of a cup-shaped preform obtained by deep drawing a raw metal plate, such as a rolled steel plate. A poly V-boot made of sheet metal has been developed, but in this type of pulley, grooves must be carved on the outer surface of the peripheral wall, so the peripheral wall of the strength reinforcement must be made relatively thick. However, since pulleys are made by deforming a uniform metal plate, if the peripheral wall is made thicker, other parts such as the boss also become thicker, making them heavier. There is an inconvenience that this will result in an increase in the cost of materials and materials.

This invention was made with attention to these circumstances,
The peripheral wall of a cup-shaped E-formed product obtained by drawing a metal blank is made sufficiently thicker than the bottom wall, and grooves are formed in multiple stages on the outer surface of the thickened peripheral wall to make it lighter. To provide a manufacturing device for a sheet metal poly pulley, which is simple and can save material costs, and can ensure sufficient strength of the peripheral wall that forms the groove forming part.

An embodiment of the present invention will be described below with reference to the drawings.

The sheet metal polyurethane pulley manufactured by the apparatus of this embodiment is made by deep drawing a metal material 1 shown in FIG. 1 using a press or the like to form a cup-shaped material 2 as shown in FIG.
Next, by trimming the opening edges of this material 2, an f-prepared molded product 3 of predetermined dimensions as shown in FIG. A semi-finished product 4 as shown in the figure is obtained, and by carving a plurality of V-grooves 5 on the outer surface of the peripheral wall 4a of this semi-finished product 4, a sheet metal polyurethane pulley 6 is produced as a finished product. 14
It is something that

Next, FIGS. 6 to 11 show that a semi-finished product 4 is obtained by thickening the peripheral wall 3a of the preformed product 3, and this semi-finished product 4 is
V on the peripheral wall 4a? An embodiment of the apparatus for engraving ink marks 5 is shown.

In this device, a support shaft 8 is pivotally mounted vertically in the center of a body 7, and an F rotary support member 9 for supporting the preform 3 is fixed to one end of the support shaft 8.

This lower rotational support member 9 has a cylindrical shape with an annular holding groove 11 on the F end surface, and the preformed product 3 is inserted into the holding groove 11.
t-C so as to fit the bottom opening edge of the holder. Further, the axial center hollow part 1- of the lower rotation support member 9 is slidably fitted with the inner rotation shape-retaining member 1 which rotates together with the lower rotation support member 9. The inner shape-retaining member I2 is cylindrical, and its end is pressed by a spring 13K to a position where it protrudes from the end surface of the holding member 90 at a predetermined speed when the spring 13K rotates. , of the E-equipped molded product 3 whose protruding end is attached to the lower rotation support member 9, r+
It is attached to i.

In addition, an electric motor 1o is fixed to one side of the machine body 7 in 11j, and the rotation 13 of the centrifugal movement [10] is transmitted through the support shaft 8 (ζ sea'J14.15, 16.17 and belt 18.+9). By transmitting the information, the rotary holding member 9 and the rotary shape retaining member 12 in the sand fin can be rotated at a predetermined speed. -F section fuselage 22 is provided, and this upper fuselage 22
An elevating shaft 23 is attached to the center of the support shaft 8 so that it can be raised and lowered freely, and a flat plate 24 is fixed to the lower part of the elevating shaft 23, and guide rods 25 are attached to both ends of the elevating shaft 23. It is useful. These guide rods 25... are slidably passed through the upper body 22, and have a collar 26 fixed to the penetrating end.
... and the upper surface of the upper body 22 are compressed in the −L direction by compression springs 27 ....

In addition, there is a slide pair ring ′ at the lower end of the lifting shaft 23.
An E rotation support member 29 is rotatably attached via a link 28. This upper rotation support/holding member 29 has a cylindrical shape having a flat surface 31 at the center of the lower surface and an annular inclined surface 32 around the flat surface 31. The bottom surface of the preform 3 mounted on the rotation support member 9 can be pressed downward. Further, the mechanism for lowering the elevating shaft 23 is such that a rotary shaft 33 is rotatably mounted on the f part body 22F by bearings 34, a cam 35 is fixed to this rotary shaft 33, and the cam 35 is fixed to the rotary shaft 33. A cam follower 36 pivotally attached to the upper end of the lifting shaft 23 is connected to the upper body 221-35 at one end of the rotating shaft 33.
The driving force of the magnetic motor 37 fixed to Boo IJ 38,
39 and belt 41.

Further, on the upper surface of the fuselage 7, a first. Second and third guide bodies 42, 43, and 44 are fixedly provided to surround the lower rotation support member 9, and each of these guide bodies 42, 43, and 44
h to 1st. Second. Third supports 45 , 46 .

47 are respectively attached to be movable forward and backward in the direction of the lower rotation support member 9, and the first. At the front end of the second support 45,46 there is a first. The second outer rotating shape retaining members 48 and 49 are rotatably supported by vertical pin shafts 51 and 52, and the front end of the third support body 47 is provided with a groove forming member 53.
is rotatable by a vertical pin shaft 54 and held at τ.

：゛Here, 111 work is done. The outer rotating shape retaining members 48 and 49 are the outer periphery;
Cylindrical IT”, +fti 48a, 49a
It is a roller-like thing having pressure surfaces 48a and 4.
9a is the preformed product 3 attached to the lower rotation support member 9.
The first outer rotation shape retention member 48 and the second outer rotation shape retention member 49 are arranged at different heights, and the first outer rotation shape retention member 48 shaped member 48
to the lower half of the peripheral wall 3a, a second outer rotating shape retaining member 49
are arranged to face the upper half of the peripheral wall 3a, respectively. The twisted second outer rotating shape retaining member 49 is attached to the pin shaft 52 so as to be able to slide upward and downward,
Due to the compression spring 55 inserted between the support body 46,
It is elastically held at a predetermined height position. On the other hand, the V-groove forming member 53 is a roller-shaped member having a groove forming surface 53a on its outer periphery. The outer surface π is pressed against it.

Further, the structure for moving these outer rotating shape retaining members 48, 49 and the groove forming member 53 forward and backward is such that the cam shafts 56, 57, 58 are attached to the body 7, and the respective supports 45, 46, 58 are attached to the body 7.
The supports 45 , 46 of each of these cam shafts 56 , 57 , 58 are located behind the cam shafts 47 and pivoted vertically.
Cams 61 , 62 , 63 are fixed to portions facing 47 , and the supports 45 , 46 are attached to these cams 61 , 62 , 63 .

Cam followers 64, 65, 6 pivoted to the rear end of 47
6 is transposed. And these camshafts 56, 5
7. The lower ends of 58 are connected via bevel gears 67, etc., and one camshaft 56 is connected to the upper body 22.
The cams 61, 62, and 63 are connected to the shaft 33 by extending upwardly so as to pass through the cams 61, 62, and 63, and connecting the extensions to the rotating shaft 33 by bevel gears 68, 68.

It is designed to operate synchronously with the cam 35 of the lowering gear 23 by 1°.

Next, the production of the sheet metal polyurethane pulley 6 from the preformed product 3 using this apparatus will be described with particular reference to FIGS.

First, the r-shaped product 3 is fitted into the inner rotary shape retaining member 12, and the lower end thereof is fitted into the retaining groove 11 of the rotary support member 9. Then, the lifting shaft 23 is lowered to press the upper surface 31 of the holding member 29 for one rotation against the end surface of the crystal 30). In other words, the preformed product 3 is moved from both ends of the preform 3 in the axial direction under l-7.
I support it. Further, the clamping surface 48a of the first externally rotating shape-retaining member 48 is brought into rolling contact with the lower half of the outer periphery of the peripheral wall 3a of this preform 3, and the clamping surface of the second externally rotating shape-retaining member 49 is brought into contact with the upper half. 49a is brought into contact. Peripheral wall 3 of single preform 3
One location in the circumferential direction of each of the lower and upper halves in a is sandwiched from the inside and outside by the inner rotating shape retaining member 12 and the outer rotating shape retaining members 48 and 49. On the other hand, the 1.sup. groove forming member 53 is moved back to a distance away from the preformed product 3.

In this state, the electric motor 10 is fully operated and the preformed product 3 is
is rotated together with the direction rotation support members 9 and 29. Then, by further operating the electric motor 37 to lower the elevating shaft 23, the distance between the rotation support members 9 and 29 is gradually reduced, and a compressive force in the axial direction of the peripheral wall 3aK of the preform 3 is applied. At the same time, the outer rotating shape retaining members 48 and 49 are gradually retreated in a direction away from the inner rotating shape retaining member 12. In other words, the inner rotating shape retaining member 12 and the outer rotating shape retaining member 48 , 49 is gradually increased.

By doing this, each part of the peripheral wall 3a of the rotating preform 3 passes between the inner rotating shape retaining member 12 and the outer rotating shape retaining members 48 and 49 for each rotation. Since the posture is corrected, even if compressive force is applied to the peripheral wall 3a in the axial direction, the peripheral wall 3a will not be deformed in waveform or out of perfect circle. The peripheral wall 3a has an inner rotating shape retaining member 12 and an outer rotating shape retaining member 4.
As the clamping distance increases to 8°49, the thickness can be increased without causing abnormal deformation. In experiments, good results were obtained by increasing the thickness of the peripheral wall of the fin from 2.3 mm to 3.2 mm. In this case, the circumference height, which was 161'll, was shortened to about 12 fl due to the thickening of the wall.

In addition, during this process of thickening the peripheral wall, the 1-rotation support part [429 comes into contact with the second outer rotation shape retention member 49, or the second outer rotation shape retention member 49 is elastically held by the compression spring 55. Therefore, it descends while being suppressed by the one-rotation support member 29, and reaches the same height position as the first external rotation shape-retaining member 48 as shown in FIG. 10 when the peripheral wall thickening is completed. . Moreover, since the inner rotation shape retaining member 12 is elastically held by the compression spring 13, it moves downward as the circumferential wall 3a becomes shorter.

After this peripheral wall thickening process is completed, the semi-finished product 4
Once obtained, the next step is ① groove forming step. In this V-groove forming process, the outer rotating shape retaining members 48 and 49 are retreated to a position away from the semi-finished product 4. Then, while the semi-finished product 4 is moved forward and rotated together with the rotational support member 29.9 below, the groove forming member 53 is gradually advanced, and the V-groove forming surface 53a of the semi-finished product 4 is rotated. Press the outer surface of the peripheral wall 4a. By doing this, the outer surface of the peripheral wall 4a π said Vi1! It metasaa K multiple VLS
is engraved, and a poly V pulley 6 made of sheet metal is obtained as a completed product.

However, the sheet metal poly V pulley 6 obtained in this way
The boss portion 6a is thin, and the surrounding wall 6 which is the groove 5 forming portion is
Since b is thick, it is lightweight and material costs can be saved, and the strength of the groove 5 forming portion can be ensured sufficiently.

In addition, in the above embodiment, the case where processing is performed without applying any heat to the preformed product was explained, but it goes without saying that the present invention is not limited to such a case. The peripheral wall may be thickened while being heated to a moderate temperature (usually below 600°C), and the material of the metal base plate is not limited to rolled steel plate, but may also be, for example, aluminum plate or steel plate. Good 0 As detailed above, according to this IJK, a cup-shaped preform obtained by drawing a metal blank is used in the lower rotating shape retaining part (fitting and insertion into a book, and the lower rotating supporting part). It is supported by the section name to O and the suppression of the rotation support part H that is paired with this lower rotation support member, and each of the outer rotation support parts 10A that are paired with the outer curve of the peripheral wall are connected by rotation. Let's hold this from inside and outside f;I
In this state, while rotating the T-equipped molded product integrally with each rotary support member, the interval between these rotary support members is gradually reduced to apply a compressive force in the axial direction to the peripheral wall. At the same time, the clamping interval of each outer rotating shape retaining member is gradually increased to correspond to the thickening of the solid wall, so that the peripheral wall does not become thicker without being corrugated due to the compressive force. Moreover, since the thickening is done gradually while rotating, there is no possibility of the solid wall becoming out of roundness or having uneven thickness. Since the V-groove forming member is rolled and pressed against the thickened peripheral wall to form the V-groove, a sufficiently reinforced multi-stage V-groove can be obtained, and inexpensive and lightweight sheet metal poly-V pulleys can be manufactured with high mass productivity. There are features that can be used.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIGS. 1 to 5 are explanatory diagrams of the processing steps of a preformed product, FIG. 6 is an IF view of the device configuration, and FIG. 7 is a plan view of the same part. , Figure 8 is Figure 6 A-A
A plan sectional view of the line portion and FIGS. 9 to 11 are sectional views showing the operating state of the main parts of the device. DESCRIPTION OF SYMBOLS 1... Metal blank plate, 3... Preformed product, 3a... Peripheral wall of preformed product, 5... V groove on peripheral wall, 6... Sheet metal poly V pulley, 9, 29.・Upper and lower rotation support member, 1
2 and 48, 49... inner and wide rotating shape retaining member, 53.
...V-groove molded member. Patent applicant Kinko Doko Welding Co., Ltd., agent
Patent attorney Takashi Suzue - m3 + -1 pole 51. -1

Claims (1)

[Claims] An apparatus for thickening the circumferential wall of a cup-shaped preform obtained by drawing a metal blank, and forming V-grooves in multiple stages on the outer surface of the thickened solid wall, the apparatus comprising: An F rotary support member that is fitted and supported and rotated; an inner rotary shape retaining member that is always elastically held in the E direction by this lower rotary support member and is inserted into the inside of the preform; and the lower rotary support member. A lower rotating support member that forms a pair on the same axis and is rotated following the preformed Jζ product by contacting and suppressing the bottom wall of the preformed Jζ product between it and the lower rotating support member, and the upper and lower parts of C). Around the outer l-J of the preform supported between the rotary support parts 11, the preform is arranged in pairs so as to be movable forward and backward in the axial center of the preform, and each of the outer surfaces facing in the axial direction of the inner wall each outer rotary shape retaining member located at least at the upper and lower portions of the inner rotary shape retaining member which is connected to the inner rotary shape retaining member by rolling contact with the inner rotary shape retaining member; A V-groove forming member that is rolled into contact with the outer surface of the peripheral wall to form a V-groove, and a second member that compresses the upper rotational support member so that the gap between the upper rotational support member and the lower rotational support member gradually decreases as the preform rotates. The first operating mechanism means is interlocked with the first operating mechanism means, and is configured to gradually retract each outer rotating shape retaining member indicated by IF in response to the thickening of the peripheral wall of the material due to the compression thereof, and to reduce the thickness of the solid wall. a second actuating mechanism means for rolling and suppressing the V-groove molded member against the solid wall after thickening; and a second actuating mechanism means for lowering and holding the outer rotating shape-retaining member located at least in the upper part following the compression action. 1. A manufacturing device for a sheet metal V-IJ V pulley, characterized in that it is equipped with a mechanism having the following features.