JPH01154841A - Foam rolling device for dissimilar diameter and multi-grooved v-pulley - Google Patents

Abstract

PURPOSE:To obtain a dissimilar diameter and multi-grooved pulley by form rolling by forming the outer peripheral face of the tip of the butt member projecting from an upper die in the stepped cylindrical shape corresponding to the cylindrical wall shape of an aiming dissimilar diameter and multi-grooved V-pulley. CONSTITUTION:When a preform 24 is set and rotated, an upper die 32 is descended to the position where the annular groove 48 of the upper die 32 and the stepping face of a can member 58 form a flange forming groove 46 with a bending roller being pressed. The butt part of the bonding roller is then recessed and a bending part is formed. A thickness increasing roller is then pressed to the bending part, the rugged curved face of a cylindrical wall is uniformized and thickened. The grooving roller 140 equipped with plural V-groove forming ribs 138 is than pressed and plural V-grooves 14 are formed. V-pulley parts 16, 18 are respectively formed for the small diameter part 10 of the cylindrical wall and the large diameter part 12 and the aiming dissimilar diameter and multi-grooved V-pulley is thus formed.

Description

Detailed Description of the Invention (Technical Field) The present invention involves rolling a bottomed cylindrical workpiece to form a step in which at least one set of V-pulley parts adjacent in the axial direction have different diameters. This relates to a rolling machine for manufacturing bottomed cylindrical multi-groove pulleys, especially when the diameter of at least one set of V pulleys adjacent in the axial direction is on the bottom side of the stepped bottomed cylindrical part. The present invention relates to a rolling processing device suitable for use in manufacturing a multi-groove V-pulley of different diameters, the diameter of which is larger than that of the V-pulley on the opening side.

(Prior Art) A multi-groove V-pulley generally has a substantially bottomed cylindrical shape, and a cylindrical wall portion of the bottomed cylindrical portion is spaced apart in the axial direction.
It has a structure including a plurality of V pulley parts each having a plurality of V grooves. A V-belt with protrusions corresponding to each V-groove is wrapped around each of these V-pulleys, and multiple drive systems are connected via these V-belts. It is designed to transmit rotational force at the same time.

By the way, such multi-groove V pulleys have superior material yield and productivity compared to manufacturing by cutting the pulley material, so they are usually manufactured by rolling a bottomed cylindrical workpiece. Manufactured by processing. and,
Generally, in the rolling process, the workpiece is compressed in the axial direction by contacting the bottom wall and the opening edge of the bottomed cylindrical part of the workpiece in the shape of a cylinder with a bottom. , a first mold member and a second mold member are arranged so as to be rotatable around the same axis and to be able to approach and separate from each other, while penetrating the second mold member concentrically and moving in the penetrating direction. A pad member is disposed so as to be rotatable and integrally with the second mold member,
In addition, a rolling device is employed in which the outer peripheral surface of the tip of the pad member protruding from the second mold member is a cylindrical surface.

If such a rolling device is used, the tip of the pad member protruding from the second mold member is inserted into the workpiece, and the workpiece is inserted between the first mold member and the second mold member. While the workpiece is being rotated while being held compressible in the axial direction between the workpiece and the workpiece, a predetermined bending roller, thickening roller, and By sequentially pressing the grooving rollers, it is possible to manufacture a multi-groove pulley in which the cylindrical wall portion has a cylindrical shape corresponding to the cylindrical surface of the outer peripheral surface of the tip of the pad member.

(Problem) However, such rolling processing equipment is only for processing same-diameter multi-groove pulleys in which the tube wall portion has a cylindrical shape and each V-pulley portion has the same diameter. Although it can be suitably used for manufacturing a grooved V pulley, a stepped bottomed cylindrical shape in which the cylindrical wall part has a stepped cylindrical shape and at least one pair of V pulley parts adjacent in the axial direction have different diameters from each other. V-pulleys with different diameters and multiple grooves, in particular, the diameter of at least one set of V-pulley parts adjacent in the axial direction is larger on the bottom side of the stepped bottomed cylindrical part than on the opening side. There was a problem in manufacturing pulleys with multiple grooves of different diameters that they could not be used as is.

That is, in order to manufacture a multi-groove V-pulley using the above-mentioned rolling machine, the outer circumferential surface of the tip protruding from the second mold member as a pad member forms the target multi-groove V-pulley cylinder. It is necessary to use one with a shape that corresponds to the shape of the wall.

Therefore, when manufacturing a multi-groove pulley with the same diameter, a pad member with a cylindrical outer circumferential surface at the tip is used, as described above, so that the outer surface of the pad member is The pad member can be easily extracted from the multi-groove V pulley and the desired multi-groove V pulley can be obtained without any problem, but as mentioned above, the cylinder wall has a stepped cylindrical shape, and it is difficult to move in the axial direction. The target of manufacturing is a multi-groove pulley with different diameters, in which the diameter of at least one set of adjacent V pulleys is larger on the bottom side of the stepped bottomed cylindrical part than on the opening side. In this case, as a pad member, the outer circumferential surface of the distal end of the pad member is such that the diameter of at least one pair of adjacent cylindrical surfaces across the stepped portion is larger on the distal side than on the proximal end. Because it is necessary to use a stepped cylindrical shape, it is possible to roll the desired multi-groove pulley with different diameters on the outside of the pad member, but the stepped outer peripheral surface of the tip of the pad member cannot be rolled. The part has an undercut shape with respect to the pulling direction of the multi-groove V-pulley of different diameters, making it impossible to pull out the multi-groove V-pulley of different diameters from the pad member. Conventional rolling equipment could not be applied as is to the production of multi-groove V pulleys.

(Solution Means) Here, the present invention has been made against the background of the above-mentioned circumstances, and its gist is that the bottom wall and The first and second mold members are arranged so as to be rotatable about the same axis and to be able to approach and separate from each other so that the workpiece can be compressed in the axial direction by abutting on the edge of the opening. a pad member is disposed concentrically through the second mold member so as to be movable in the penetrating direction and rotatable integrally with the second mold member; The outer peripheral surface of the tip of the pad member protruding from the mold member is formed into a predetermined stepped cylindrical surface, and the tip of the pad member is inserted into the workpiece, and the workpiece is inserted into the workpiece. The outer peripheral surface of the cylinder wall of the bottomed cylindrical part of the workpiece is rotated while the workpiece is compressively sandwiched in the axial direction between the second mold member and the first mold member. By sequentially pressing a bending roller, a thickening roller, and a grooving roller against the pad member, the cylindrical wall portion is formed into a stepped cylindrical shape corresponding to the stepped cylindrical surface of the outer circumferential surface of the tip end of the pad member. In an apparatus for rolling a multi-groove V-pulley of different diameters, which has a plurality of V-pulley parts each having a plurality of grooves in the cylindrical wall part, the pad member is connected to a core member in the center and the core. and a plurality of peripheral edge members around the member, and the core member is provided so as to be extractable from the plurality of peripheral edge members, and the plurality of peripheral edge members are arranged on the center side of the pad member and the pad member. so that the stepped cylindrical surface is formed when the cough core member is inserted into the plurality of peripheral members; The plurality of peripheral edge members can be moved stepwise toward the center of the pad member in a state in which the plurality of peripheral edge members are pulled out by a predetermined amount from inside the plurality of peripheral edge members, and the plurality of peripheral edge members are In a state where the pad member is moved toward the center thereof, the peripheral member can be pulled out from the multi-groove pulley of different diameters machined on the outside of the pad member.

(Operation/Effect) According to such a rolling processing device, it is possible to adapt to the shape of the cylindrical wall of a multi-groove V-pulley with different diameters, which aims to shape the outer peripheral surface of the tip of the pad member protruding from the second mold member. By adopting the stepped cylindrical surface shape, it is possible to form the target multi-groove V-pulleys with different diameters in the same way as with conventional forming equipment, and even if one adjacent one in the axial direction The target of manufacturing is a multi-groove pulley with different diameters, in which the diameter of the V pulley part of the set is larger on the bottom wall side than on the opening side, and the outer peripheral surface of the tip of the pad member Even if a stepped portion is formed that has an undercut shape with respect to the pulling direction of the multi-groove V-pulley of different diameters, after the core member is pulled out from within the peripheral member constituting the pad member, the peripheral edge By moving the member stepwise toward the center of the pad member, it becomes possible to easily pull out the peripheral member, that is, the pad member, from the multi-groove pulley with different diameters, and it is possible to easily pull out the peripheral member, that is, the pad member, from the pulley with multiple grooves of different diameters. This makes it possible to easily remove the target multi-groove, multi-groove tool with different diameters from the pad member.

In other words, according to the rolling device according to the present invention, the outer peripheral surface of the tip of the pad member protruding from the second mold member is shaped into a stepped cylinder corresponding to the shape of the cylindrical wall of the target multi-groove V-pulley of different diameters. With this shape, the diameter of the multi-groove pulley with different diameters, which could not be manufactured using conventional rolling equipment, or the diameter of a pair of V-pulleys adjacent in the axial direction, is the same as that of the stepped cylindrical part. It is also possible to manufacture pulleys with different diameters and multiple grooves in which the diameter on the bottom wall side is larger than that on the opening side. Groove pulleys can now be manufactured with good material yield and productivity by rolling.

(Example) Hereinafter, in order to clarify the present invention more specifically,
One embodiment thereof will be described in detail based on the drawings. In addition,
Here, as shown in FIG. 3, the cylinder wall has a stepped cylindrical shape consisting of a small diameter part 10 on the opening side and a large diameter part 12 on the bottom wall side. A multi-groove pulley 20 with different diameters has a structure in which a V-boo portion 16° 18 having a plurality of V grooves (here, 5 and 6 grooves, respectively) 14 is formed on the portion 10 and the large diameter portion 12, respectively. An example in which the present invention is applied to a rolling device used for manufacturing will be described.

First, FIG. 1 shows the different diameter multi-groove V pulley 20 shown in FIG.
An example of a rolling processing apparatus suitable for use in manufacturing is shown. There, 22 is a lower mold as a first mold member, and a circular mounting part 26 is provided on the upper surface of the lower mold on which a preform 24 (described later) as a workpiece is placed. In addition, the bottom wall flange portion 28 of the multi-groove V pulley 20 of different diameters surrounds the mounting portion 26 (see FIG. 3).
An annular flange forming groove 30 is formed to form a flange.

On the other hand, in FIG. 1, reference numeral 32 denotes an upper mold as a second mold member, which has a substantially cylindrical shape and is disposed above the lower mold 22 concentrically with the lower mold 22. There is. This upper mold 32 is attached to a pressing plate 34 at its upper end, and the pressing plate 34 is driven by an elevating drive means (not shown).
It is designed to be raised and lowered integrally with the clamping plate 34 as the clamping plate 34 is raised and lowered. As a result, the upper mold 32 and the lower mold 22 are brought close to and separated from each other in the vertical direction.

The inner circumferential surface of the upper mold 32 has a stepped cylindrical surface shape, with a predetermined length portion on the lower end side serving as a small diameter portion 36, and a portion above the small diameter portion 36 serving as a large diameter portion 38. An annular stepped surface 40 is formed between the small diameter portion 36 and the large diameter portion 38. A through hole 42 is formed in the pressing plate 34 so as to form a smooth cylindrical surface with the large diameter portion 38 of the inner circumferential surface of the upper die 32 .

Further, on the inner peripheral edge of the lower end surface of the upper die 32, a flange forming groove 46 (see FIG. 4), which will be described later, is formed to form an opening flange portion 44 (see FIG. 3) of the multi-groove V pulley 20 of different diameters. An annular groove 48 forming a part is formed.

A first movable platen 50 is disposed above the clamping platen 34 on which the upper mold 32 is disposed so as to be movable in the vertical direction with respect to the clamping platen 34 . This first movable platen 50 includes a pressing plate 3
A through hole 52 is formed concentrically with the through hole 42 of No. 4, and the upper end portion is fixedly supported at the inner peripheral edge of the through hole 52, and a substantially cylindrical member consisting of a pair of semi-cylindrical members 54 and 56 is formed. A cam member 58 having a shape is provided. As shown in FIG. 1, the through hole 42 of the pressing plate 34 and the upper mold 3
The cam member 58 is slidably fitted into the inner hole 2.

Here, the inner circumferential surface of the cam member 58 has a tapered shape as a cam surface located in the middle part in the axial direction and separating the lower small diameter part 59 and the upper large diameter part 60. A stepped surface 61 is formed.

On the other hand, the outer circumferential surface of the cam member 58 has a length portion corresponding to the small diameter portion 10 of the multi-groove V-pulley of different diameters 20 at its lowermost end, which forms a small diameter portion 62 having a diameter corresponding to the small diameter portion 10. and the upper part of the small diameter part 62 is a medium diameter part 63 having a diameter corresponding to the small diameter part 36 of the inner peripheral surface of the upper mold 32 and longer by a predetermined dimension than the small diameter part 36, Further, the upper portion of the medium diameter portion 63 is a large diameter portion 64 having a diameter corresponding to the large diameter portion 38 of the inner peripheral surface of the upper mold 32 and sufficiently longer than the large diameter portion 38; Those small diameter portions 62
Annular stepped surfaces 66 and 68 are formed between the intermediate diameter portion 63 and the intermediate diameter portion 62 and the large diameter portion 64, respectively.

As shown in the figure, such a cam member 58 has a large diameter portion 64 and a medium diameter portion 63 on its outer circumferential surface, respectively, and a large diameter portion 38 on the inner circumferential surface of the upper mold 32.
The cam member 58 is slidably fitted to the small diameter portion 36 of the upper die 32 until the cam member 58 reaches the position where the stepped surface 68 on the outer circumference abuts the stepped surface 40 of the upper die 32. It is designed to be fitted inside. Then, in a state where the cam member 58, that is, the first movable plate 50 is lowered to a lowered position where the stepped surface 68 contacts the stepped surface 40 of the upper die 32, the small diameter portion of the outer peripheral surface of the cam member 58 is lowered. 62 and a predetermined length portion of the medium diameter portion 63 are configured to be able to protrude below the lower end surface of the upper die 32.

Here, the length of the cam member 58 projecting downward from the lower end surface of the upper mold 32 is set to be approximately the same length as the length of the cylindrical wall of the preform 24, which will be described later. Further, a stepped surface 66 on the outer peripheral surface of the cam member 58 is formed on the upper mold 32.
The tapered surface forms a flange forming groove 46, which will be described later, in cooperation with an annular groove 48 on the lower end surface.

Further, above the first movable plate 50, a second movable plate 70 and a third movable plate 7 are respectively movable in the vertical direction.
Further, above the third movable plate 72, a core mounting plate 74 is disposed so as to be movable in the vertical direction. Here, an elevating plate 7 is mounted on the upper surface of the core mounting plate 74 and is moved up and down by an elevating drive means different from the elevating drive means that drives the pressing plate 34 up and down.
6 is attached, and the core mounting plate 74
, the third movable plate 72. A movable plate lifting rod 80 having a large-diameter retaining portion 78 at the lower end is suspended to slidably pass through the second movable plate 70 and the first movable plate 50. Child mounting board 74. first movable Vi,
50. The second movable plate 70 and the third movable plate 72 are raised from their lowered positions step by step as the elevating plate 76 moves upward.

That is, as shown in FIG. 70 and the third movable plate 72 are attached to the bottom wall portion of the preform 24, which will be described later, on which a first peripheral member 90 and a second peripheral member 92, which will be described later, are placed on the mounting portion 26 of the lower mold 22. Their respective lowered positions are defined by their contact. Then, the first movable plate 50 and the second movable plate 7
0, and between the second movable plate 70 and the third movable plate 72
A predetermined gap is formed between them when they are lowered to the lowered position.

On the other hand, the elevator plate 76 can be lowered to a position where the lower surface of the core mounting plate 74 comes into contact with the upper surface of the third movable plate 72, and the movable plate lifting rod 80 is connected to the elevator plate 76. In the lowered position, the engaging portion 78 at the lower end thereof
is lowered by a predetermined distance from the engagement position with the first movable plate 50.

Therefore, when the elevator plate 76 is raised from the lowered position, the core mounting plate 74 is first raised.
After the core mounting plate 74 has been raised a certain distance from its lowered position, the engaging portion 78 of the movable plate lifting rod 80 is engaged with the first movable plate 50, and the first movable plate 50 is lowered. It will allow you to rise from your position. Further, when the first movable plate 50 rises a certain distance from its lowered position and its upper surface comes into contact with the lower surface of the second movable plate 70, the second movable plate 70 also moves to the lower surface. 76, and when the second movable plate 70 rises a certain distance from its lowered position and its upper surface abuts the lower surface of the third movable plate 72, the abutment Based on this, the third movable plate 72 can also be raised.

As is clear from FIG. 1, the engaging portion 78 of the movable plate lifting rod 80 engages with the stepped surface 84 of the counterbore portion 82 formed in the first movable plate 50. When engaged, it is housed in the counterbore 82 (see FIG. 7). Further, as shown in FIG. 1, the pressing plate 3
4 is formed with a through hole 86 that allows the movable plate lifting rod 80 to protrude downward.

By the way, the core mounting plate 74 has a third movable plate 72, a second movable plate 70, and the cam member 58 movably penetrating the cam member 58 in the axial direction, and concentrically with the cam member 58.
A longitudinal rod-shaped core member 88 with a regular octagonal cross section and a tapered lower end is provided. Then, four first peripheral edges each having a longitudinal shape pass through the cam member 58 in the axial direction so as to surround the cough core member 88 while facing each plane of the outer surface of the core member 88. The member 90 and the second peripheral member 92 are arranged alternately in the circumferential direction (see FIG. 2). And here, the first peripheral member 9
0 and the second peripheral member 92 are inserted into the second movable plate 70 and the third movable plate 72 by shafts 98 and 100, respectively, in the insertion holes 94 and 96 through which the core member 88 is inserted. attached, thereby causing the first peripheral member 90 and the second peripheral member 92 to
are rotatable about axes 98 and 100, respectively, within a plane containing the axis of the core member 88.

Here, on the outer surfaces of the first circumferential edge member 90 and the second circumferential edge member 92 in the direction of rotation, there is provided a step on the inner circumferential surface of the cam member 58 located at the intermediate portion in the longitudinal direction. Stepped surfaces 102 and 104 are cam surfaces corresponding to surface 61.
are formed, and the outer surface above and below the stepped surfaces 102 and 104 are circular arc surfaces corresponding to the large diameter portion 60 and the small diameter portion 59 of the inner peripheral surface of the cam member 58, respectively. It is said that As shown in FIG. 1, the first movable plate 50. Both the second movable plate 70 and the third movable plate 72 are in their lowered positions, and the stepped surfaces 102,104 of their peripheral members 90,92 are on the cam member 5.
8, up to a position where the outer surfaces above and below the stepped surfaces 102 and 104 contact the large diameter portion 60 and the small diameter portion 59 of the cam member 58, respectively. The peripheral members 90,92 can be rotated, but when the cam member 58 is raised relative to the peripheral members 90,92 by raising the first movable plate 50, the stepped The surfaces 102 and 104 extend along the stepped surface 61 of the cam member 58 to the small diameter portion 5 of the cam member 58.
9, the peripheral members 90, 92 are respectively rotated inward in the rotation direction.

Here, the stepped surface 104 of the second peripheral member 92
is formed at a higher position than the stepped surface 102 of the first peripheral member 90, so that as the first movable plate 50 rises, the first peripheral member 90 first moves inward in the rotation direction. After the first movable plate 50 is further raised a predetermined distance, the second peripheral member 92
can be rotated inward in the direction of rotation (
(See Figures 7 and 8). That is, as the elevator plate 76 rises, the first peripheral member 90 and the second peripheral member 9
2 can be rotated stepwise toward the center of the core member 88.

Note that the stepped surface 10 of the peripheral member 90, 92 in FIG.
2, 104 and the stepped surface 61 of the cam member 58, the first circumferential edge member 90 and the second circumferential edge member 92 are respectively located on the inner side in the rotational direction (on the inner side of the core member 88). After being rotated to the center side), each movable plate 70
．． 72 will be raised. Further, when the peripheral members 90 and 92 rotate inward in the rotational direction, the core member 88 is moved in advance to the peripheral members 90 and 92 based on the lifting operation of the elevator plate 76 prior to the raising of the first movable plate 50. 90.92 will be raised to a position that does not impede rotation.

On the other hand, the lowermost ends of the first peripheral member 90 and the second peripheral member 92 protruding from the cam member 58 each have a distal end surface 106 which protrudes by a certain distance outward in the rotational direction. Convex portions 110 and 112 with a diameter of .108 are formed. And, as shown in Figure 1,
When the outer surfaces of the peripheral members 90 and 92 are brought into contact with the large diameter portion 60 and the small diameter portion 59 of the cam member 58, the arc surfaces 106° 10 of the convex portions 110 and 112
From 8, the target different diameter multi-groove ■ Large diameter portion 12 of pulley 20
A cylindrical surface 114 corresponding to the cam member 58 is formed when the cylindrical surface 114 is formed.
The lower end surface of the cam member 58 is brought into contact with the cylindrical surface 114 and the upper surface of the convex portions 110 and 112.
A stepped cylindrical surface corresponding to the shape of the cylindrical wall of the target multi-groove V-pulley 20 of different diameters is formed from the small diameter portion 62 of the outer circumferential surface. Note that the lower end surface of the cam member 58 has a stepped surface 68 on its outer peripheral surface that is similar to the stepped surface 4 of the upper die 32.
In the lowered position of the first movable plate 50 in contact with the first movable plate 50, the first movable plate 50 is brought into contact with the upper surfaces of the convex portions 110, 112.

In addition, when forming a stepped cylindrical surface corresponding to the shape of the cylinder wall of the different diameter multi-groove V pulley 20, each peripheral member 90, 9
The lower part of the inner surface of the 20-turn force direction allows the core member 8 to
A void space is formed which has a regular octagonal cross section corresponding to the outer surface of the lower end side of 8 and has a tapered lower end portion. Then, as shown in FIG. 1, when the core mounting plate 74, that is, the elevator plate 76 is lowered to its lowered position, the core member 88 is pushed into the space. As a result, a stepped cylindrical surface corresponding to the shape of the cylindrical wall of the multi-groove V-pulley of different diameters 20 is firmly formed. As is clear from this, in this embodiment, the first peripheral member 9
0. The second peripheral member 92 and the cam member 58 constitute a pad member. Furthermore, in this example,
The small diameter portion 62 of the outer circumferential surface of the cam member 58 forms the proximal cylindrical surface of the stepped cylindrical surface of the pad member, and the cylindrical surface 114 formed by the convex portions 110, 112 of the peripheral member 90, 92. constitutes the tip side cylindrical surface of the stepped cylindrical surface of the pad member.

In addition, when forming the stepped cylindrical surface, the third movable plate 72 is pressed downward based on the contact with the core mounting plate 74, and the third movable plate 72 is By the provided stepped cylindrical stopper member 116,
The second movable plate 70 and the first movable plate 50 are pressed downward, so that the stepped cylindrical surface has a constant shape corresponding to the cylindrical wall shape of the different diameter multi-groove IJ 20. It is designed to be stably held in the shape of.

Moreover, here, as shown in FIG. 2, the convex portion 1
The circumferential thickness of the first peripheral member 90 including 10 is made thinner outward in the rotation direction, while the convex portion 11
The circumferential thickness of the second peripheral member 92 including the second peripheral member 92 is thicker on the outer side in the rotation direction, so that, as described above, the elevating plate can be moved from the position where the cylindrical surface 114 is formed. As the member 76 rises, the first peripheral member 90 and the second peripheral member 92 can be rotated stepwise inward in the rotational direction. Here, in this rotating state inward in the rotating direction, the convex portion 1 of each peripheral member 90.92
10 and 112 are respectively positioned closer to the center of the core member 88 than the small diameter portion 62 of the outer circumferential surface of the cam member 58, and as a result, each of the peripheral members 90 and 92 , a multi-groove V with different diameters that is rolled on the outside
It is designed so that it can be pulled out from the pulley 20.

Further, as shown in FIG. 1, each peripheral member 90
．． Stepped surfaces 118 and 120 are formed on the inner surfaces in the rotational direction of 92, respectively, at intermediate portions in the longitudinal direction. A cavity with a regular octagonal cross section is formed into which the core member 88 is inserted from the side. When forming such a space, those stepped surfaces 11
A predetermined gap is formed between the inner surface of the peripheral member 90.92 above 8.120 and the outer surface of the core member 88, respectively. Based on the existence of these gaps, each peripheral member 90.92 can be rotated toward the center of the core member 88 without completely withdrawing the core member 88 from within the peripheral member 90.92. It has become.

In this embodiment, the rolling device having such a structure integrally rotates the core member 88 around the machine shaft 2 which coincides with the axial center of the core member 88 by a rotating mechanism (not shown), similar to the conventional rolling device. This allows the multi-groove pulley 20 of different diameters to be rolled.

By the way, the multi-groove pulley 20 of different diameters shown in FIG. 3 is manufactured as follows using such a rolling machine.

In other words, the rolling machine of this embodiment is used to form multiple grooves with different diameters.
When manufacturing the pulley 20, first, the upper mold 32 is raised to a predetermined height higher than its lowered position (see FIG. 4) by the lifting operation of the pressing plate 34, and the lifting plate 76 is raised. Actuation causes cam member 58. The core member 88 and the first and second peripheral members 90, 92 are respectively raised from their lowered positions to a predetermined height higher position. In this state, the mounting portion 26 of the lower mold 22
A substantially cylindrical preform 24 with a bottom as a workpiece is placed on the bottom wall thereof, and then, as shown in FIG. The clamping plate 34 is lowered to a position where it touches or almost touches the edge, and the lower end of each peripheral edge member 90, 92 comes into contact with the bottom wall of the preform 24, pushing the bottom wall downward. Type 2
The elevator plate 76
is lowered. As a result, the preform 24
is set in the rolling machine.

In addition, in the cent state of this preform 24,
Core member 88. First movable plate 50. The second movable plate 70 and the third movable plate 72 are respectively lowered to their lowered positions and formed from the arcuate surfaces 106, 108 of the protrusions 110, 112 of each peripheral member 90, 92, as described above. cylindrical surface 114 and a small diameter portion 62 on the outer periphery of the cam member 58
As a result, a stepped cylindrical surface corresponding to the shape of the cylindrical wall of the target multi-groove IJ 20 of different diameters is formed.

The preform 24 may be similar to that used in the rolling process of multi-groove pulleys of the same diameter, for example,
A metal plate material such as a rolled steel plate punched into a circular shape and subjected to deep drawing will be used.

When the setting of the preform 24 is completed, the entire apparatus is rotated around the machine axis 2 by a rotation mechanism (not shown), and the preform 24 is rotated around its center line. As shown in FIG. 4, under such rotational operation, the bending roller 122 is attached to the cylindrical wall of the preform 24.
124 is being pressed, the upper mold 32 is lowered to a position where the annular groove 48 of the upper mold 32 and the stepped surface 66 of the cam member 58 form a flange formation 446. As a result, the contact portions of the bending rollers 122 and 124 are recessed inward in the radial direction, and the portion between the recesses is bent into a convex portion 125 that protrudes annularly outward in the radial direction. Article 126 is molded.

Note that the convex portion 125 of this bent product 126 is located on the bending roller 1.
Based on the adjustment of the tip angles of the cam members 22 and 124, the stepped surface is formed at a portion corresponding to the stepped surface between the cylindrical surface 114 formed by the peripheral member 90, 92 and the small diameter portion 62 of the cam member 58. Become.

In addition, as shown in FIG. 4, in this bent product 126, based on the presence of the flange forming groove 30 on the lower mold 22 side and the flange forming groove 46 on the upper mold 32,
A flange portion 28.44 having substantially the same shape as that of the multi-groove pulley 20 of different diameters is formed.

Once such a bent product 126 is formed, as shown in FIG. By being pressed, the uneven curved surface of the cylindrical wall of the bent product 126 is evened out and the thickness is increased. Thus, the cylindrical surface 1 formed by the peripheral member 90.92
14 and the small diameter portion 62 of the cam member 58, which corresponds to the stepped cylindrical surface, that is, the target different diameter multi-groove V-boo IJ
Stepped cylindrical thickened hole 132 corresponding to the cylindrical wall shape of 20
is formed.

The thickening hole 132 has a concave groove 128 of the thickening roller 130 located at a portion corresponding to the stepped portion of the cylinder wall.
A protruding portion 134 corresponding to this will be formed. Further, on the inner surface of the thickened hole 132, an overlapping portion 136 is formed in a substantially central portion in the width direction of the protruding strip portion 134, in a state continuous with the stepped surface of the inner circumferential surface. Furthermore, the flange portions 2 at both ends of the thickened hole 132 in the axial direction
8.44 will be molded into approximately the final shape at this stage.

When the forming of the thickened hole 132 is completed, next
As shown in FIG. 6, a grooving roller 140 having a plurality of V-groove forming ribs 138 is pressed against the thickened hole 132, and is pressed against each cylindrical surface of the thickened hole 132. A plurality of V grooves 14 are respectively formed. As a result, V pulley portions 16 and 18 are formed on the small diameter portion 10 and large diameter portion 12 of the cylinder wall, respectively, and the desired V pulley 20 with multiple grooves of different diameters is formed. Note that a separation band 142 having a predetermined height is formed between the V pulley portions 16 and 1B from the convex strip portion 134 of the thickening hole 132 to separate the V pulley portions 16.18. Become.

When the different diameter multi-groove V pulley 20 is rolled in this manner on the outside of the peripheral member 90, 92, the clamping plate 34, that is, the upper die 32 is moved from the lowered position shown in FIG. 6 (FIG. 4). As the elevator plate 76 is raised a predetermined distance, the elevator plate 76 starts to rise from its lowered position, and based on the rise of the elevator plate 76, the core member 88 and the cam member 58. The first peripheral member 90 and the second peripheral member 92 are sequentially connected to the different diameter multi-groove V pulley 2.
It is extracted step by step from within 0.

That is, when the elevator plate 76 is raised from its lowered position, the core member 88 is first raised from its lowered position to a height that allows the first peripheral member 90 to rotate inward in the rotational direction, Thereafter, the engaging portion 78 of the movable plate lifting rod 80 is engaged with the No. 10 movable plate 50, and the cam member 58 is raised. As the cam member 58 rises, as shown in FIG. 59, and the first peripheral member 90 is rotated toward the center of the core member 88. Then, the first movable plate 50 is brought into contact with the lower surface of the second movable plate 70, and the first peripheral member 90 is raised.

That is, from the different diameter multi-groove V pulley 20 to the first peripheral member 90
is extracted.

Further, when the second movable plate 70 is raised and the first peripheral member 90 is raised a predetermined distance from its lowered position, as shown in FIG. The stepped surface 104 rides on the small diameter portion 59 of the cam member 58 and is rotated toward the center of the core member 88. Thereafter, the second movable plate 70 comes into contact with the third movable plate 72 and lifts it up, thereby pulling out the second peripheral member 92 from the multi-groove pulley 20 with different diameters. The cam member 58 and the peripheral members 90 and 92 constituting the pad member are all pulled out from the multi-groove pulley 20 of different diameters.

Accordingly, such cam member 58 and peripheral member 90.92
After the drawing operation, the different diameter multi-groove V pulley 20 can be removed from between the lower die 22 and the upper die 32, and the desired different diameter multi-groove V pulley 20 can be obtained. .

In this way, if the rolling device of this embodiment is used, the third
As shown in the figure, a set of V pulley parts 1 adjacent in the axial direction
It goes without saying that it is possible to form a multi-groove V pulley 20 with different diameters in which the diameters of the pulleys 6 and 18 are larger on the bottom wall side (18) than on the opening side (16). , a cam member 58° constituting a pad member from such different diameter multi-groove IJ20, a first peripheral member 90 and a second peripheral member 92
The rolled multi-groove V-pulley 20 of different diameters can be easily taken out from between the lower mold 22 and the upper mold 32 by cutting the same multi-groove V-pulley 1J20 of different diameters. Different diameter multi-groove pulley 20 with extremely superior material yield and productivity compared to manufacturing using this method.
can be manufactured.

Note that in this embodiment, the pad member is constituted by the cam member 58 and the first and second peripheral members 90 and 92 as peripheral members;
0 and the second peripheral member 92 is also possible.

Further, in this embodiment, the peripheral edge members are composed of two groups of four first peripheral edge members 90 and second peripheral edge members 92, and when pulled out from the multi-groove pulley 20 of different diameters, Peripheral member 90°92 is 2 for each same group
Although the core member 88 can be moved (rotated) toward the center of the core member 88 in stages, it is possible to move (rotate) the core member 88 toward the center of the core member 88 by configuring the peripheral members from three or more groups. It is also possible to divide the process into three or more stages for each group.

Furthermore, in this embodiment, a set of V pulley portions 16 are provided on the cylinder wall.
．． 18, and the diameter of the V pulley portions 16 and 18 is larger in diameter on the bottom wall side (18) than on the opening side (16). An example has been described in which the present invention is applied to a rolling machine used for rolling, but the present invention is not limited to this.
A rolling machine used for manufacturing a multi-groove V pulley with different diameters having a structure including three or more V pulley parts including 6°18, in other words, at least one set of V pulley parts adjacent in the axial direction Rolling process used to manufacture multi-groove V pulleys with different diameters, which have a structure with three or more V pulleys, in which the diameter of the bottom wall side is larger than that of the opening side. The present invention can also be applied to devices, and it is possible to enjoy the same effects as the present embodiment by applying the present invention to those rolling processing devices.

In addition, it is omitted to list specific examples such as a pull-out mechanism for pulling out the peripheral member from the pulley with multiple grooves of different diameters, etc., but it is possible for a person skilled in the art to understand the present invention without departing from the spirit of the present invention. It goes without saying that the invention can be implemented with various changes, modifications, improvements, etc. based on knowledge.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of the rolling processing apparatus according to the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. FIG. 2 is a longitudinal sectional view showing an example of a multi-groove pulley of different diameters manufactured using the apparatus. Fourth
8 are explanatory sectional views for explaining the manufacturing process in the case of manufacturing the multi-groove pulley of FIG. 3 using the rolling machine of FIG. 1, respectively. 10: Small diameter part 12: Large diameter part 14: ■Groove 16, 18: V pulley part 20: Different diameter multi-groove ■Pulley 22: Lower mold (first mold member) 24 Nib form (workpiece) 32: Upper mold (Second mold member) 34: Pressing plate 50: First movable plate 58: Cam member 62: Small diameter portion (base end side cylindrical surface) 70: Second movable plate 72: Third movable plate 74: Core mounting plate 76: Elevating plate 80: Movable plate lifting rod 88: Core member 90: First peripheral member 92: Second peripheral member 102.104: Stepped surface 106, 1os: Arc surface 110.112: Convex portion 114: Cylindrical surface (cylindrical surface on the tip side) 116: Straight buckle member 122.124: Bending roller 126: Bending hole 130: Thickening roller 132: Thickening product 140: Grooving roller 142: Separation band Applicant Kojima Press Kogyo Co., Ltd. Figure 3 Figure 4 Figure 6 Figure 7 Figure 8

Claims (2)

[Claims] (1) Rotate around the same axis so that the workpiece can be compressed in the axial direction by coming into contact with the bottom wall and opening edge of the bottomed cylindrical part of the workpiece. possible,
The first and second mold members are disposed so as to be able to approach and separate from each other, and the second mold member is movable in the penetrating direction by penetrating the second mold member concentrically. A pad member is disposed so as to be rotatable integrally with the pad member, and the outer peripheral surface of the tip portion of the pad member protruding from the second mold member is formed into a predetermined stepped cylindrical surface, so that the tip portion of the pad member is inserted into the workpiece, and the workpiece is held compressively in the axial direction between the second mold member and the first mold member, and the workpiece is inserted into the workpiece. By sequentially pressing a bending roller, a thickening roller, and a grooving roller against the outer circumferential surface of the cylinder wall of the bottomed cylindrical part of the workpiece while rotating, the cylinder wall part forms the tip of the pad member. An apparatus for rolling a multi-groove V-pulley of different diameters, which has a stepped cylindrical shape corresponding to the stepped cylindrical surface of the outer peripheral surface, and has a plurality of V-pulley parts each having a plurality of V-grooves in the cylinder wall. The pad member is configured to include a core member at the center and a plurality of peripheral members around the core member, and the core member is provided so as to be extractable from the plurality of peripheral members. On the other hand, a state in which the plurality of peripheral edge members are provided so as to be movable stepwise toward the center side of the pad member and in the axial direction of the pad member, and the core member is inserted into the plurality of peripheral edge members. In this step, while the stepped cylindrical surface is formed, when the core member is pulled out by a predetermined amount from within the plurality of peripheral members, the plurality of peripheral members are moved toward the center side of the pad member. In a state in which the plurality of peripheral edge members are moved toward the center of the pad member, the peripheral edge member is moved in a stepwise manner, and in a state where the peripheral edge members are moved to the center side of the pad member, the peripheral edge member is A rolling processing device for a multi-groove V pulley of different diameters, characterized in that it can be pulled out from a groove V pulley. (2) The outer peripheral surface of the distal end of the pad member protruding from the second mold member is a stepped cylindrical surface consisting of a small diameter proximal cylindrical surface and a large diameter distal cylindrical surface; The cylindrical wall portion of the multi-groove V-pulley of different diameters is formed with a stepped cylindrical structure in which the cylindrical portion on the opening side has a smaller diameter than the cylindrical portion on the bottom wall side, and one for each of the cylindrical portions. The rolling processing device for a V-pulley with multiple grooves of different diameters according to claim 1, wherein a V-pulley portion is formed.