JPS6222697B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a collar plate used in a drum for wire drawing and winding of cables and other wire materials. Conventionally, this type of flange plate is made by drawing a circular flange plate material a, as shown in the first diagram, with a press die consisting of a protrusion type b having radial protrusions of approximately the same size as the flange plate material and a concave groove type c adapted thereto. In addition to the method of forming or welding a circular plate material e to a groove-shaped material d cut to a predetermined size as shown in FIG.
As shown in D, grooves g with different depths on the left and right sides are formed across the elongated metal plate f using press dies h and i, thereby bending the metal plate f laterally. Methods of connecting both ends by welding or other methods are known. Therefore, in the method shown in the first diagram, the dimensions of the collar plate to be produced are limited by the dimensions of the press mold, and it is necessary to prepare press molds of various sizes.
Furthermore, since the radial grooves on the side surfaces are formed by drawing the material, an extensible material is used as the material, resulting in high material costs and disadvantages in that sufficient strength cannot be obtained. In addition, the method shown in the second figure has the disadvantage that it takes time to manufacture the groove-shaped member d and the circular plate member e because it requires time and effort to prepare them separately and welds a large number of locations. Furthermore, although it is relatively easy to form the entire side surface into a wave shape using the method shown in the third figure,
Since it involves welding the edges, etc., the workability is poor, and it is difficult to curve the metal plate f laterally with a small radius of curvature, making it impossible to form a small opening in the center of the flange plate. There was a problem in that it was not possible to obtain a small opening suitable for attaching a winding drum with an inner diameter.

The purpose of the present invention is to provide a method for manufacturing a collar plate that eliminates such drawbacks and inconveniences.
A substantially circular metal flange plate material having an opening in the center and having a diameter larger than the desired flange plate is made of one projecting strip type and one concave strip type arranged across the diameter direction of the metal flange plate material. A pair of press dies is operated to first reduce the diameter of the collar plate material in one direction while forming a protrusion across it, and then to move the collar plate material relative to the press die. A flange plate having a desired size is obtained by rotating the ridge plate material to form a ridge that intersects with the ridge plate material at the central portion of the flange plate material while decreasing the diameter in the other direction of the flange plate material. . To explain the embodiment of the present invention with reference to the drawings, FIG. 4 shows a plan view of a metal flange plate material 2 for a winding drum having a circular hole or other hole 1 in the center. A bendable metal material with a diameter dimension larger than the desired collar plate diameter is used. The material 2 is inserted between a press mold 6 consisting of a set of a linear protrusion mold 4 and a concave mold 5 as shown in FIG.
A protrusion 7a as shown in FIG. 7 is formed in the diametrical direction. As shown in FIG. 6, the protruding strips 9 of the protruding strip type 4 have a longitudinal intermediate portion 8 removed to form separate protruding shapes 9a, 9b, and each protruding strip 9a, 9b is separated from the intermediate portion 8. The concave strip 10 of the concave strip type 5 also has a substantially fan-shaped planar shape that narrows in the direction of the section 8.
A, 9b are formed into a concave shape that can be adapted to form fan-shaped protrusions 7a on the material 2. The protruding strips 9 of the protruding strip mold 4 are formed into straight strips of a constant width as shown in FIG.
Alternatively, the intermediate portion 8 may be formed as a series without being omitted.

The material 2 is first pressed in its diametrical direction by the press die 6 as described above to form the protrusion 7a as shown in FIG. Part 2a of material 2,
By holding the parts 2b movably in the directions of both molds 4 and 5, the parts 2a and 2b move while decreasing their diameters to provide the material 2 necessary for forming the protrusion 7a. Thus, the protrusion 7a can be formed without stretching the material 2. As a result of this pressing, the material 2, which had previously been circular, becomes approximately oval as shown by the solid line in FIG. The intersecting protrusions 7b at the center are pressed to obtain a flange plate 11 having cross-shaped protrusions as shown in Figure 8. In this case, as in the case of forming the first protrusion 7a, the parts 2 of the material 2 on the left and right sides of the press mold 6 are
c, 2d is drawn in while decreasing its diameter,
The protrusions 7b are formed without causing any stretching of the material 2.

Between each of the protrusions 7a and 7b, if necessary, protrusions 7c and 7d can be formed as shown in FIGS. 9 and 10, thus obtaining the flange plate 12 as shown in FIG. 11.

In this way, the present invention prepares a substantially circular metal flange plate material having an opening in the center and having a diameter larger than the desired flange plate, and then has protrusions and grooves arranged across the diameter of the metal flange plate material. A press die consisting of a pair of dies is operated to first reduce the diameter in one direction to form a protrusion, and then the material is rotated relative to the press die to form the protrusion and the central portion of the material. Since the intersecting protrusions are formed while decreasing the diameter in the other direction of the material to obtain a flange plate of the desired size, the material forming the protrusions is not stretched, and therefore the material As a result, it is possible to use materials with high tensile strength, such as structural rolled steel, which are not ductile and can be bent, making it possible to make thinner materials and obtain lightweight and inexpensive collar plates. Forming can be performed using the same press mold if the length of the concave ridges of the mold is within the length, and there is no need to prepare press molds of various sizes, making it economical. Since it is formed multiple times across the direction and its diameter is gradually reduced, it can be formed into a collar plate in a short time, and has the advantage of being able to form a small-diameter opening in the center that is suitable for a small-diameter winding drum.

[Brief explanation of the drawing]

1 to 3 are explanatory diagrams of a conventional method for manufacturing a flange plate, and FIGS. 4 to 11 show an embodiment of the method of the present invention. Figure 5 is a perspective view of the press die, and Figure 6 is the - of Figure 5.
The bottom view along the line, Figures 7 to 10 are plan views of the material showing the manufacturing process, Figure 11 is a perspective view of the collar plate product, and Figure 12 is the same as shown in Figures 5 and 6. It is a bottom view of a modification of a press mold. 1...Open hole, 2...Metal flange plate material, 4...Protrusion type, 5...Concave line type, 6...Press type, 7a, 7
b, 7c, 7d...projections.

Claims (1)

[Claims] 1 A substantially circular metal flange plate material having an opening in the center and larger than the diameter of the desired flange plate is made of one protrusion type and one concave type that are arranged across the diameter of the metal flange plate material. A pair of press dies is operated to first reduce the diameter of the flange plate material in one direction while forming a protrusion across it, and then the flange plate material is moved relative to the press dies. A flange plate having a desired size is obtained by rotating the flange plate so as to form a ridge that intersects the ridge at the center of the flange plate material while decreasing the diameter in the other direction of the flange plate material. A method for manufacturing a flange plate for a winding drum.