JP4293702B2 - Sheet metal processing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet metal working method for forming a sheet material having a continuous wave shape.
[0002]
[Prior art]
Even a plate having a continuous corrugated shape is formed into a three-dimensional shape with further steps, and a plate material cut from a conventional flat plate into a required shape is pressed to form a continuous corrugated shape, and then the step It was manufactured by press working to form.
[0003]
For example, in order to ensure braking and steering on icy and snowy roads and to improve uneven wear resistance on general roads, tires on the tire are provided with multiple cuts on the tire tread. Is formed by a blade having a continuous wave shape attached to a tire vulcanization mold.
[0004]
In addition to the continuous wave shape, this blade has a three-dimensional shape by providing a step, so that a more effective cut can be formed in the tire tread.
In order to manufacture such a blade, conventionally, a plurality of plate materials of a required shape are cut from a flat plate, each plate material is formed into a continuous corrugated shape by pressing, and then the plate material formed into a continuous corrugated shape is pressed to form a step. And formed the finished blade.
[0005]
[Problems to be solved by the invention]
As described above, conventionally, a finished product was manufactured by pressing the plate material cut into a required shape from a flat plate for each of the two steps of a continuous wave shape and a step, so that the production efficiency was not good.
[0006]
This invention is made | formed in view of such a point, The process which makes it the objective is to provide the sheet-metal processing method which manufactures the board | plate material which has a continuous waveform shape and a level | step difference efficiently.
[0007]
[Means for solving the problems and effects]
In order to achieve the above object, the invention according to claim 1 is characterized in that a metal plate material is bent into a predetermined continuous waveform, the bent plate material is cut, and a plurality of intermediate materials having a required shape are cut out. The intermediate material was pressed by a combination mold obtained by combining a first mold and a second mold having a mold surface having the same continuous corrugated shape as the corrugated shape of the intermediate material to provide a step. A sheet metal working method for obtaining a finished product having a continuous wave shape was adopted.
[0008]
First, after bending the plate material, the bent plate material is cut into the required shape to produce a plurality of intermediate materials, and the intermediate material is stepped by pressing to form a continuous corrugated shape with steps. Since the finished product is obtained, the intermediate material of each piece is obtained by one-step pressing, and the production efficiency is remarkably superior to the conventional one.
[0009]
According to a second aspect of the present invention, in the sheet metal working method according to the first aspect, the combination die is formed by arranging the first die and the second die in a corrugated ridge line direction and pressing the intermediate material. Further, a step is formed in the ridge line direction of the waveform.
[0010]
A three-dimensional shape can be easily formed by forming a continuous waveform shape and a step in the ridge line direction of the waveform.
[0011]
According to a third aspect of the present invention, in the sheet metal working method according to the second aspect, the continuous waveform of the intermediate material is fitted into the continuous waveform shape of one of the first mold and the second mold. And positioning and performing the press working.
[0012]
Since the corrugation of the intermediate material is fitted to the corrugation of one mold surface, the positioning can be performed reliably, and a finished product with excellent quality can be manufactured.
[0013]
According to a fourth aspect of the present invention, in the sheet metal working method according to any one of the first to third aspects, the finished product is a blade used in a mold for manufacturing a tire. To do.
[0014]
A blade that forms a plurality of cuts provided in a tire tread can be efficiently produced.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment according to the present invention will be described with reference to FIGS. In the present embodiment, a blade that is used in a tire mold and forms a cut in a tire tread is manufactured.
[0016]
The metal flat plate 1 as shown in FIG. 1 is subjected to a continuous wave-shaped bending process as shown in FIG.
First, the metal molds 11 and 11 are press-molded, and a waveform is formed by four bends ((2) in FIG. 2).
The molds 11 and 11 are long in the direction of the corrugated ridgeline, and the bending is formed to the full width of the flat plate 1.
[0017]
Next, the molds 12 and 12 are added to the molds 11 and 11 and press-molded, and the flat plate 1 is further formed with a waveform by further bending (Fig. 2 (2)).
Similarly, the molds 13 and 13 are added and press-molded (FIG. 2 (3)), and the molds 14 and 14 are added and press-molded (FIG. 2 (4)).
[0018]
By sequentially adding the molds and press-molding in this way, the entire flat plate 1 is subjected to a wave-like bending process, and a wave-like plate material 2 having a continuous wave shape as shown in FIG. 3 is formed.
A predetermined portion of the corrugated plate 2 is cut into a required shape as indicated by a broken line in FIG.
[0019]
In this way, the continuous wave-shaped intermediate material 3 is manufactured.
On the other hand, as shown in FIGS. 4 to 7, the press molding machine 20 in the next process includes a first mold 21 and 21 and second molds 22 and 22 having a continuous corrugated mold surface. Combined by 23, facing up and down.
[0020]
The first mold 21 and the second mold 22 themselves are composed of a plurality of molds, and the continuous corrugated shape of the mold surface includes a corrugated portion having the same shape as the corrugated intermediate material 3 and bent portions at both ends.
A second mold 22 is attached to the rear side of the first mold 21 and a step is formed between both mold surfaces.
[0021]
A perspective view of the lower combination mold is shown in FIG.
The first mold 21 and the second mold 22 have the ridges of the continuous waveform aligned in plan view, and the mold surface of the second mold 22 is located lower than the mold surface of the first mold 21. Thus, a step d is formed.
[0022]
The upper combination mold corresponds to the lower combination mold, the mold surface of the second mold 22 is lower than the mold surface of the first mold 21, and a step d having the same width is formed. As shown in FIG. 5, there is a horizontal and horizontal deviation d ′ between the lower first mold 21 and the second mold 22 and the upper first mold 21 and the second mold 22.
[0023]
In the processing by the press molding machine 20 as described above, first, the corresponding continuous waveform of the intermediate material 3 is fitted to the corrugated portion of the mold surface of the lower first mold 21 as shown in FIGS. Position.
[0024]
7 and 8, when both ends of the intermediate material 3 are bent into a final shape, a step 4b is generated between the front and rear in the ridge line direction of the corrugation.
In this way, the blade 4 which is a continuous wave-shaped finished product having the step 4b is manufactured.
[0025]
A plurality of intermediate materials 3 are cut out from a corrugated plate material 2 having a continuous corrugated shape formed on the entire flat plate 1, and the single intermediate material 3 is pressed once to have a continuous corrugation 4a and a step 4b. The blade 4 is easily manufactured, and the production efficiency is remarkably excellent as compared with the conventional press working over two steps of a continuous corrugated shape and a step for each sheet material.
[0026]
Since the corrugation of the intermediate material 3 is fitted to the corrugation of the mold surface of the lower first die 21 during the pressing process, the blade 4 can be reliably aligned and manufactured with high quality. Can do.
[0027]
The blade 4 is attached to the surface of the tire vulcanization mold to form a large number of cuts in the tire tread. The completed blade 4 has a step 4b along with a continuous waveform 4a as shown in FIGS. Therefore, a more effective cut can be formed in the tire tread.
[Brief description of the drawings]
FIG. 1 is a perspective view of a plate material used in a sheet metal processing method according to an embodiment of the present invention.
FIG. 2 is a side view showing a plurality of bending processes by press molding.
FIG. 3 is a perspective view of a corrugated plate material.
FIG. 4 is a schematic front view of a press molding machine.
FIG. 5 is a side view of the same.
FIG. 6 is a perspective view of a lower combination mold.
FIG. 7 is a schematic front view of a press molding machine during a pressing operation.
FIG. 8 is a side view of the same.
FIG. 9 is a front view of a blade.
FIG. 10 is a plan view of the same.
11 is a side view of the blade as viewed in the direction of arrow XI in FIG. 9;
[Explanation of symbols]
1 ... flat plate, 2 ... corrugated plate material, 3 ... intermediate material, 4 ... blade,
11, 12, 13, 14 ... mold,
20 ... press molding machine, 21 ... first mold, 22 ... second mold, 23 ... mold mounting jig.

Claims (4)

Bending a metal plate into a predetermined continuous waveform, cutting the bent plate and cutting multiple intermediate materials of the required shape,
The intermediate material is pressed by a combination mold obtained by combining a first mold and a second mold having a mold surface having a continuous corrugated shape that is the same as the corrugated shape of the intermediate material. A sheet metal working method characterized by obtaining a finished product having a continuous wave shape. The combination die is characterized in that a first die and a second die are arranged in a corrugated ridge direction, and a step is formed in the intermediate material by press working in the corrugated ridge direction. The sheet metal processing method according to 1. The press working is performed by positioning the continuous waveform of the intermediate material by fitting the continuous waveform of the intermediate material into the continuous waveform shape of one of the first mold and the second mold. 2. The sheet metal processing method according to 2. The sheet metal processing method according to any one of claims 1 to 3, wherein the finished product is a blade used in a mold for manufacturing a tire.

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