JPS6192731A - Manufacture of grooved rotating body - Google Patents

Abstract

PURPOSE:To form easily a rotating body having plural line grooves on the peripheral surface by a simple device, by forming a groove of a prescribed shape on a base material by a grooveforming die of an inner surface working wheel and a groove forming die of an outer surface working wheel. CONSTITUTION:A prescribed space is left between inner surface working wheels 2, 2, 2' and 2'', and a base material 5 is fitted externally to these wheels. Subsequently, outer surface working wheels 4, 4 and 4 are driven to rotate and a shaft of the outer surface working wheel is pressed and moved gradually in the direction of a shaft 1 of the inner surface working wheel. Groove forming molds 6, 6- of the outer surface working wheels 4, 4 and 4 rotate the base material 5, are welded under pressure to the inner surface of the base material and rotated. The base material 5 is bent to a recessed shape gradually by the groove forming molds 6, 6- of the outer surface working wheels 4, 4 and 4. As this bending advances, when the shaft 1 is pressed in the direction as indicated with an arrow A through a pressing member 7, a side interval of groove forming molds 3, 3- is narrowed, and the bending of the base material 5 becomes deeper. In the final stage, side faces of the inner surface working wheels 2, 2, 2' and 2'' abut on each other, a groove die of the final shape is formed by the groove forming molds 3, 3-, and a desired V-groove is formed on the base material 5 together with the groove forming dies 6, 6-.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is suitable for use in manufacturing methods for rotary bodies with grooves, particularly for molding rotary bodies that require a plurality of grooves such as multistage pulleys. The present invention relates to a method of manufacturing a grooved rotating body.

[Prior art and its problems]

For example, when molding a grooved rotating body having grooves or protrusions on the circumferential surface using a tubular material, a beading process has conventionally been generally used.

As is well known, in this beading process, a mandrel is inserted inside a tubular material, and a roller is pressed from the outer periphery of the tubular material, causing the tubular material to follow and gradually deform the tubular material along the mandrel. 1. It forms ridges and ridges.

However, the above processing method poses no particular problem when forming a single groove on a tubular material, but when applied to a case where multiple grooves are arranged in parallel in the axial direction, such as in a multistage pulley, for example,
On the outer surface of the tubular material? ! When grooving (by pressing two rollers at the same time), as the material deforms between the two rollers, the material is pulled in the axial direction, causing elongation, which causes work cracks and work hardening in the material. The desired product becomes difficult to obtain. In addition, since the above processing method uses the elongation of the material to form a groove, the edges such as the opening edge of the groove are pulled out and cannot be formed sharply, and post-processing may be required. Due to these problems, it was considered that the conventional beading method could not be applied to the molding of a rotating body having a plurality of grooves, such as a multistage pulley.

Another processing method is the bulge processing method, but this processing method uses high-pressure equipment, which not only increases equipment costs for molds and other equipment, but it also uses the elongation of the material. Therefore, there are the same problems as with the above-mentioned beating processing method.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned problems with the prior art, and has improved this, making it possible to easily form a rotating body having a plurality of grooves on the circumferential surface by using a simple device, and making it possible to easily form a rotating body having a plurality of grooves on the circumferential surface. The object of this invention is to provide a method for manufacturing a fully-filled rotating body that can form a groove with sharp edges by bending, regardless of elongation.

[Essentials of invention]

In order to achieve the above object, the present invention supports a plurality of inner and outer machining wheels whose outer peripheries are groove molded so as to be movable in the axial direction on mutually parallel axes, and all of these inner machining wheels A tubular material having a diameter larger than the machining shaft is fitted onto the outside of the tubular material, and the groove molding die of the outer surface machining wheel is pressed into contact with the groove molding mold of the inner surface machining wheel at a position corresponding to the groove molding mold of the inner surface machining wheel on the outer peripheral surface of the tubular material, and the material is rotated. While driving, the respective axes are moved in a direction in which the distance between the axes approaches each other, and bending is started by aligning the tubular material with the groove mold formed by the groove forming die of the adjacent inner surface machining wheel. The inner machining wheel is moved under pressure in the axial direction as it progresses, and in the final stage, the groove forming mold of the inner machining wheel and the groove molding mold of the outer machining wheel, where the sides join together, form a groove of a predetermined shape in the material. It is characterized by:

[Embodiments of the invention]

The present invention will be described below with reference to embodiments shown in the drawings.

The embodiment shown in FIGS. 1 and 2 shows the case where the present invention is applied to the manufacture of a multi-stage pulley having three grooves as a grooved rotating body. Three inner machining wheels 2, 2 that can move in the axial direction and rotate integrally.
．． 2', and an inner machining ring 2'' integrally formed at the end of the shaft 1.

The two inner processing wheels 2, 2 located in the middle have groove forming molds 3.3 on both sides of the outer periphery, and the two inner processing wheels 2t, 2++ located on both sides have grooves only on one side, which is the inner side. Molding mold 3,
3, these inner processing wheels 2, 2.2',
In a state where the side surfaces of the groove forming mold 3 are in contact with each other,
, 3... form three ■-shaped grooves.

The outer surface machining wheels 4, 4.4 are the inner surface machining wheels 2°2.2'.
, 2'', and are supported on a shaft (not shown) so as to be movable in the axial direction and rotate integrally with each other, and the shaft of this outer surface machining wheel 4.4.4 is pressed by a pressure means (not shown). It is possible to press and move in one direction of the axis of the inner surface machining wheel.

Above outer surface processing wheel 4.4.4. On the outer periphery thereof, there is provided a groove forming die 6 for forming grooves in the material 5 in cooperation with the groove die formed by the inner working wheels 2.2.2', 2''.

The shaft 1 of the inner machining wheels 2, 2.2', 2'' is pressed against the receiving member 8, which is the fixed side, by pressing in the direction of the arrow 6 via a pressing member 7 that moves by hydraulic pressure, mechanical means, etc. The receiving member 8 on the fixed side is slidable.
Also, the pressure may be applied in the opposite direction to the arrow A.

The material 5 is a plastically deformable material such as iron, and has a cylindrical shape with an inner diameter that can be fitted around the outer circumference of the inner-machined ring 2.2.2', 2'' with a margin. The end portion on the processing wheel 2'' side is closed by a side plate 5a.

Therefore, as shown in the first diagram, the inner machining wheel 2°2.2
', leave a certain interval between 2", and add material 5 to this.
to be fitted externally.

Next, when the outer surface processing wheel 4.4.4 is rotationally driven and the □ axis of the outer surface processing wheel is gradually moved under pressure in the direction of the axis 1 of the inner surface processing wheel, the groove forming mold of the outer surface processing wheel 4.4.4 is formed. 6.6...
is pressed against the inner surface of the material 5 and rotates by 1 degree while rotating the material 5 in a driven manner, so that the cable material 5 is gradually bent into a concave shape by the groove molding die 6.6 of the outer surface processing wheel 4.4.4. .

As this bending progresses, when the shaft 1 is pressed in the six directions of the arrows through the pressing member 7, the inner working wheels 2° 2.2', 2
``The groove molding die 3.3... has a narrower side spacing, and the material 5 is compressed without applying tension in the axial direction.
The bend becomes deeper.

In the final stage, as shown in FIG. 2, the inner machining wheel 2.2.
The side surfaces of 2' and 2'' are in contact with each other, and a groove mold of the final shape is made between the groove forming molds 3.3..., and the groove forming molds of the outer surface machining wheels 4, 4.4 are fitted into this. 6, 6, . . . , a desired V-groove is formed in the material 5.

During this time, the raw material 5 is only subjected to bending processing, and there is almost no elongation of the raw material 5.

After completion of molding, press member 7 and outer surface machining wheel 4°4.4
By retracting the axis of
, 2.2' and 2'', and can be removed by pulling it out in the axial direction.

Figures 3 and 4 show a modified example in which grooves of different diameters are formed using a cylindrical material 5' with both ends open. All are supported on @1 so as to be able to move in the axial direction, the pressing member 7 is pressed against the side surface of the inner processing wheel 2 at the outer end so as to rotate together, and the material 5 is
By making the small diameter V-groove forming part small in advance, and making the inner machined wheel 2 of that part a small diameter and the outer machined ring 4 a large diameter, grooves of different diameters can be formed as shown in the fourth figure. .

By selecting the shapes of the groove forming dies for the inner and outer machining wheels, it is of course possible to form grooves with shapes other than (1) grooves, and the number of grooves is also limited to the illustrated embodiment. It's not something you can do.

〔Effect of the invention〕

As explained above, the present invention supports a plurality of inner and outer machining wheels whose outer peripheries are groove molded so as to be movable in the axial direction on mutually parallel axes, and all of these machining axes A tubular material having a diameter larger than the machining shaft is fitted onto the outside of the tubular material, and the groove molding die of the outer surface machining wheel is pressed into contact with the groove molding mold of the inner surface machining wheel at a position corresponding to the groove molding mold of the inner surface machining wheel on the outer peripheral surface of the tubular material, and the material is rotated. While driving, the respective axes are moved in a direction in which the distance between the axes approaches each other, and bending is started by aligning the tubular material with the groove mold formed by the groove forming die of the adjacent inner surface machining wheel. The inner machining wheel is moved under pressure in the axial direction as it progresses, and in the final stage, the groove forming mold of the inner machining wheel and the groove molding mold of the outer machining wheel, whose sides join together, form a groove of a predetermined shape in the material. As a result, even a rotating body such as a multi-stage pulley with multiple grooves can be easily formed using simple equipment.In particular, the material in the groove forming area can be formed by bending only, without using elongation. Since the grooves are formed, work hardening does not occur in the material, and therefore a grooved rotating body with uniform wall thickness can be obtained without cracking or cracking due to work hardening. In addition, since the material does not stretch, the material can be sufficiently distributed to the edges, and the edges can be formed sharply.
There is no need for post-processing. Moreover, if the groove molding die of the outer surface machining wheel is given a mirror finish, there are various effects such as the ability to easily make the surface of the molded grooved rotor body mirror-finished.

[Brief explanation of the drawing]

FIG. 1 is a sectional view at the start of processing showing an embodiment of the method of the present invention, FIG. 2 is a sectional view at the end of the same processing, and FIG. 3 is a view equivalent to FIG. 1 of another modified embodiment. Figure 4 is a diagram equivalent to Figure 2. 2...Inner surface processing wheel, 4...Outer surface processing wheel, 3.6...
・Groove mold, 5.5'...Material.

Claims (1)

[Claims] A plurality of inner and outer machining wheels each having a groove-shaped outer periphery are each supported movably in the axial direction on mutually parallel axes, and all of these inner machining wheels have a tubular shape with a larger diameter than the machining wheels. A material is fitted onto the outside of the tubular material, and the groove forming mold of the outer surface processing wheel is pressed into contact with the outer circumferential surface of the tubular material at a position corresponding to between the groove forming molds of the inner surface processing wheel, and the distance between the respective axes is determined while rotating and driving the material. moves the tubular material in the direction in which it approaches, and begins bending the tubular material along the groove mold formed by the groove mold of the adjacent inner surface processing wheel, and as the processing progresses, the inner surface processing wheel is moved in the axial direction. A grooved rotating body characterized in that a groove of a predetermined shape is formed in a material using a groove forming mold for an inner processing wheel and a groove forming mold for an outer processing wheel, whose side surfaces are joined to each other in the final stage. manufacturing method.