JPH05169153A - Method for reinforcing stile of work material - Google Patents

Abstract

PURPOSE:To increase reinforcement of stile, which is provided on a work material to be forward progressively worked, while keeping width of the edge narrow. CONSTITUTION:The inside of the stile 12 of the material 11 to be forward progressively worked is bent downward to form a bent part 15; the strength of the stile is increased as a result; and warping and breaking of the working material is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reinforcing edges of a processed material, for example, a method of reinforcing edges formed on both edges of a material which is fed in a progressive die and processed.

[0002]

2. Description of the Related Art For example, various operations are performed by automatically feeding a hoop material wound in a roll shape to each stage in sequence. FIG. 3 is a diagram showing such a processing material and the work performed on it, and referring to the perspective view of FIG.
Is processing material, 12 is Ensan 12 (hereinafter simply referred to as san)
, 13 are product parts to be products formed in the drawing step, 14 are elongated holes formed in the length direction of the processing material 11, and the processing material is fed in the direction of the white arrow. The processing material is, for example, a long strip-shaped material that is rolled. Such a person is required to be narrow in order to minimize scrap (scrap) from the processed material and increase the material utilization rate. FIG. 3B is an enlarged view of a portion B surrounded by a broken line in FIG.

When the thickness of the processing material is small, in the progressive die processing, when the number of processing steps is large, the processing material is bent during the material feeding, which hinders the feeding of the material. Referring to FIG. 3B, if the feed force of the material is P ₁ and the resistance force between the material and the die such as frictional force is P ₂ , the number of machining steps increases and the part shown in FIG. It was confirmed that the length became 1 to 2 m, P ₂ became large, the balance between P ₁ and P ₂ was lost, and the deformed shape was as shown in FIG. 3 (B).

Conventionally, a method has been performed in which a bead 15 is formed and reinforced as shown in FIG. It should be noted that the same drawing is a view in which the shape of the bead is cut in the lateral direction and the cut two parts are separated so as to be easily understood. However, this method requires punches / dies for bead molding, and
The width of the gap becomes wider at the portion A between the opposing arrows, and the amount of scrap increases and the yield decreases.

[0005]

Therefore, an object of the present invention is to make the strip-shaped processing material that is fed and processed in the progressive die as narrow as possible without deteriorating the yield of the processing material. Is to provide a method.

[0006]

According to the method of the present invention, a strip-shaped processing material processed by a progressive die is provided with an edge along its length, and the outer edge of the edge processing material is It is characterized in that the opposite side is bent to form a bent portion along the edge.

[0007]

That is, according to the present invention, the inside of the corrugation is bent parallel to the edge of the processing material downward from the surface of the processing material to form a bent portion, and the bending portion reinforces the corrugation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to FIGS. 1 (A) is a perspective view of a portion where the product portion 13 of the processing material is formed, FIG. 1 (B) is a sectional view taken along line BB of FIG. 1 (A), and FIG. 2 is FIG. 1 (B). 2 (A) is a sectional view before punching, FIG. 2 (B) is a sectional view after punching, in which 15 is a bent portion and 16 is a die. , 17 is a punch, 18 is a punch cutting blade, and 19 is a bending blade at the back of the punch.

FIG. 1 shows the principle of the present invention by taking as an example the steps performed after the product portion 13 is formed. In the present invention, the inner edge of the pad is bent as shown in FIG. 1 (B). Here, the inner side is the inner side of the outer edge of the processed material 11. That is, as shown in FIG. 1 (B), the bent portion 15 is formed by slightly bending the inside of the slab 12 downward,
As a result, even if the width L of Mr. 12 was small, Mr. 12 was able to have sufficient strength.

About forming the bent portion 15 on the Mr. 12,
In the present invention, the trim process after forming the product portion 13 is used. After forming the product portion 13 by drawing, the product portion 13 is separated from the processing material 11 by a step (trim step) of separating the product portion 13 from the processing material. For that purpose,
Using the die 16 and the punch 17 shown in (A), the scrap 20 is cut off by the punch cutting edge 18 of the punch 17 as shown in FIG. In the present invention, the back of the punch cutting edge 18 on the opposite side is a bending blade 19, and as shown in FIG.
The outer edge of the product portion 13 is cut at 18, and at the same time, the inside of the holder 12 is bent by using the bending blade 19. Therefore, in order to carry out the method of the present invention, only the means used in the conventional example is sufficient, and no special step is required. Experiments have also revealed that the small bending portion shown in FIG. 1 (B) has sufficient strength of the groove 12 to prevent breakage of the processed material in a later step.

The practice of the method of the present invention is not limited to utilizing the trim process described above, but the hole 14 as shown in FIGS. 1 and 2 is formed at the beginning of the process and the hole 14 is formed. The formation of the hole 14 and the bending process of the groove 12 may be performed by the method shown in FIG. The point is that the process shown in FIG. 2 is carried out at some stage where progressive processing is performed on the processed material to be sent, but the process shown in FIG. 2 should be carried out as early as possible. It is preferable for preventing deformation.

[0012]

As described above, according to the present invention, the steps are particularly set in order to suppress the material loss by reducing the width of the corrugation and to make the bent portion for the corrugation reinforcement. Since it is not necessary, the structure of the mold is prevented from becoming complicated, and the cost of the mold can be reduced, and the deformation of the processing material when processing with the progressive die of the processing material is ensured by an inexpensive method. Was realized.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, in which FIG. 1A is a perspective view of a portion where a product part is located, and FIG. 1B is a B- of FIG. 1A.
It is a B line sectional view.

2A and 2B are cross-sectional views for explaining the method of the present invention, where FIG. 2A is a diagram showing a state before processing and FIG. 2B is a diagram showing a state after processing.

FIG. 3 is a diagram of a processing material processed by a progressive die, FIG.
Is a perspective view showing the portion machined into the processed material, (B) in the figure is an enlarged perspective view of portion B in the same figure (A), and (C) is a cut to show the bead made in the processed material. It is a perspective view which shows the two parts.

[Explanation of symbols]

 11 Machining material 12 Mr. Mari 13 Product part 14 Hole 15 Bead (bending part) 16 Die 17 Punch 18 Punch cutting edge 19 Punch back bending blade (bending blade) 20 Scrap

Claims (1)

[Claims] 1. A strip-shaped processing material processed by a progressive die is provided with an edge (12) along its length, and the edge of the edge (12) opposite to the outer edge of the processing material is bent. A method for reinforcing an edge of a processing material, which comprises processing and forming a bent portion (15) along the edge (12).