JPS6163323A - Cutting method and cutting die of pressing stock - Google Patents

Abstract

PURPOSE:To elevate a productivity and to reduce a cost by obtaining a different cutting line with changing the die height of a die and punch. CONSTITUTION:The cutting blade 6a of the upper part of 1st sectional die 6 and 1st upper part cutting blade 11 are made to engage under the lower dead point condition, when the position of a punch 8 is moved to the upper rank side with abutting the upper face of the punch 8 to a slide so as to make bigger the die height by a die 5 and punch 8. Consequently a pressing stock 3 is cut off with the same cutting line 21 as the shape of 1st upper part cutting blade 11 between both dies 5 and punch 8. The plate 14 for regulation is then fitted between the punch 8 and slide so as to make the die height by the die 5 and punch 8 smaller. Due to the main punch 9 being made in a biting condition between the die 6 and die 7, the cutting of 2nd upper part cutting blade 12 is added to the cutting of 1st upper part cutting blade 11 and the cutting is performed with a cutting line 22.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a cutting method used to cut continuously supplied sheet metal material into an appropriate shape, and a cutting die directly used for carrying out the method. It is related to.

(Prior art) As a conventional cutting die for sheet metal material, for example, the 11th cutting die
Some had the structure shown in the figure.

In other words, the numbers 1 and 2 in Figure 1 indicate that the cutting line of the predetermined shape is 7.
A die having 36 lower cutting edges 1a, 2a,
The painter's cutting blades 1a and 2a are opposed to each other, and are arranged symmetrically when viewed from above. Also, these two dies 1,
A punch (not shown) is provided above each of the lower cutting edges 1a and 2 so as to be movable up and down.
An upper cutting blade for cutting the sheet metal material 3 is provided between the upper cutting edge and the upper cutting edge.

Then, the sheet metal material 3 is continuously supplied between the die 1.2 and the punch so as to cover both the dies 1.2 as shown by the imaginary line in FIG. , 2 is cut off.

In many cases, the cut end of the material is advanced a predetermined length from the die 2 in the feeding direction A of the sheet metal material 3, so that two sheets of the sheet metal material are cut off with one descent of the punch. 3 Also, since the sheet metal material cut as described above will be finished into a product through subsequent press processing, etc., it is preferable that the sheet metal material be of an effective size and shape considering the desired product. At the same time, the cutting die needed to be able to make cuts that could correspond to the size and shape of the intended product or other anticipated products.

However, such conventional cutting dies only have a cutting edge that forms a fixed cutting line, so the spacing between both dies and punches cannot be changed in response to changes in the size and shape of the material. The only countermeasure that can be taken is to change the length of the material to be cut in the feed direction, and it is impossible to change the cutting line, which affects the shape.

In addition, in order to obtain cutting lines that correspond to multiple product shapes, dies and punches must be prepared for each product shape, and in this case, there is a problem that the cost of manufacturing the molds becomes enormous. was there.

(Object of the Invention) The present invention has been made in view of the above-mentioned problems of the conventional art. A method and method for cutting sheet metal material that can improve productivity, reduce costs, and save mold manufacturing costs by making it possible to select an effective cutting line taking into account a given product shape. It is characterized by providing a cutting type.

(2) Structure of explanation) The method for cutting sheet metal materials according to the present invention involves a die equipped with lower cutting blades of different heights and each of the lower cutting edges when cutting continuously supplied sheet metal materials along appropriate cutting lines. The method is characterized in that the sheet metal material is supplied between the blade and a punch having an upper cutting edge corresponding to the blade, and different cutting lines are obtained by changing the die hide of the die and the punch, and this method is directly applicable to the implementation of this method. The cutting die used has a first sectional die and a second sectional die having different heights, with their lower cutting edges facing each other, and each sectional die is also arranged at approximately 180' rotationally symmetrical positions. A punch having an approximately X-shaped die, an upper cutting edge corresponding to the lower cutting edge of the first seven-comb die, and an upper cutting edge corresponding to the lower cutting edge of the second seventh comb-one die. The present invention is characterized in that the die and/or the die hide of the punch can be changed.

(Example) The present invention will be explained below based on the drawings.

FIGS. 1 to 6 are diagrams showing an embodiment of the present invention.

That is, the sheet metal cutting method according to the present invention involves continuously cutting a strip of sheet metal material between a die having lower cutting blades of different heights and a punch having upper cutting blades corresponding to each of the lower cutting blades. The sheet metal material is cut by the upper cutting blade and the lower cutting blade by joining the die and punch, and at this time, the die hide of the die and punch is changed to match the height of each of the lower cutting blades. VJ differs depending on
Cutting is performed at the disconnection (lower cutting edge).

In other words, if the die and die hide of the die and punch are adjusted to a large extent so that only the higher lower cutting edge and the upper cutting edge of the punch engage, and (1) both lower cutting edges and the upper cutting edge of the punch engage with each other. Different cutting lines can be obtained depending on the case where the die hide is made small:A, and with this method, it is possible to cut sheet metal materials with different shapes with just one cutting die. become.

Next, a cutting die directly used in the above cutting method will be explained.

That is, as shown in FIG. 2, the die 5 includes two first sectional dies 6.6 and two second sectional dies 7.7 which are lower than the first sectional die 6 by a height h. The sectional dies 6.6, 7.7 are arranged at rotationally symmetrical positions of about 180°, thereby forming a substantially X-shape.

Further, in order to form the above-mentioned approximately X-shape, the first sectional die 6 and the second sectional die 7 have one end bent in opposite directions, and the bent ends are directed toward the center. , the respective end faces are brought into contact with the side surfaces of adjacent sectional dies 6.7 to form a central portion.

And each sectional die 6.7 is.

Lower cutting edges 6a and 7 are attached to the upper edges of the opposing surfaces of the first sectional die 6 and the second sectional die 7, respectively, which are paired.
It is equipped with a.

On the other hand, as shown in FIG. Auxiliary punch 10 corresponding to the tip abutting portion of the second sectional die 7 (B, B in FIG. 2).
10, and corresponds to the lower cutting edge 6a of the first sectional die 6.

2a and the upper cutting edge 10 formed on the auxiliary punch 10.10.
a, 10a are connected to form a first upper cutting edge 11, and further provided with a second upper cutting edge 12.degree. 12 corresponding to the lower cutting edge 7a, 7a of the second sectional die.

In addition, the raw punch 2 has the upper g8 cutting blade 11 (2a).
so that the second upper cutting edge 12 becomes lower by a height H,
Its lower surface (the upper surface in FIG. 1) is inclined.

In addition, the auxiliary punch 10 has a shape in which only the upper cutting edge TOa can match the first upper cutting edge 11, and the main portion is set back by a height of 82, which is larger than the above-mentioned height H. , this prevents the main part of the auxiliary punch 10 from exceeding the second upper cutting edge 12, so that the main punch 2 does not cross the first sectional die 6 and the second sectional die 7.
It is designed so that it can fit between the two.

Furthermore, the center i of the punch 8 between the two auxiliary punches 10 and 10? The lIc is provided with a clearance to allow cutting with the center of the die 5 mentioned above.

The tie 5 configured as described above is installed on the upper surface of a bolster (not shown), and the punch 8 is installed on the lower surface of a slide (not shown) that moves up and down facing the bolster. At this time, the punch 8 is provided with an adjusting plate (to be described later) as a die-hide changing means that can be engaged with and detached from the slide, and is moved up and down by engagement and detachment of this plate, so that the up and down position at the bottom dead center is changed. It is now possible to do so.

Next, the operation of the cutting die equipped with the tie 5 and punch 8 described above will be explained.

In addition, in this embodiment, as shown in FIG. 33 and FIG. They are arranged symmetrically when viewed from above.

First, the sheet metal material 3 is shown in FIGS. 3 and 4 [2! Both dies 5.5 and punches 8, as shown by the phantom lines in j.
It is continuously supplied as shown in the figure 8. Then, the slide is lowered and the sheet metal material 3 is inserted into the die 5 and the punch 8.
At this time, as shown in FIG. 5, the die 5 and punch 8 cut the die
The upper surface of the punch 8 is brought into contact with the slide so that the distance between the lower surface of the die and the upper surface of the punch at the bottom dead center state is large.
If the position of the punch 8 is moved to the upper side, the upper cutting edge 6a of the first sectional die 6 and the first upper cutting edge 11 will mesh with each other in the bottom dead center state, and as a result, the As shown in FIG.
Cut off the sheet metal material 3 by holding the solid line in FIG. 6.

Note that when the punch 8 is moved to the upper side, the lower cutting edge 7a of the second sectional die 7 and the second upper 8
8 and the cutting edge 12 do not come into contact with each other.

Next, a 3A trimming plate 14 is inserted between the punch 8 and the slide 13 so that the die bite caused by the tie 5 and the punch 8 is small, and the punch 8 is moved by the thickness of the plate 1. If it is moved to the lower side, the main punch 2 will move to the first sectional die 6 as shown by the imaginary line in FIG.
and a state of biting between the second sectional die 7.

The cutting by the second upper cutting blade 12 is added to the cutting by only the first upper cutting blade 11 mentioned above, and as shown by the imaginary line in FIG. Ru.

Further, in the case of the above cutting, a portion corresponding to the main punch 2 is cut off from the sheet metal material 3, but this cut portion can also be used as another product material.

Note that the shapes of the die 5 and the punch 8 are not limited; for example, as shown in FIG. 7 and FIG. using a die/X between a punch (not shown) corresponding to this tie 15 and the die 15.
In addition, as shown in FIGS. 9 and 10, the first sectional die 26 with the curved lower cutting edge 26L on the right can be It is also possible to cut the sheet metal material 3 having predetermined cutting lines 21, 22 using the die 25 in combination with the second sectional die 2 f').

Furthermore, as explained in the above embodiment, when a plurality of dies and punches are arranged, if the adjustment plate 14 is provided between the punch and the slide in order to change the die hide, it is possible to ? The upper and lower positions 16 of the notches can be made different, and different cutting lines can be obtained before and after the feeding direction of the sheet metal material depending on the product shape.

Further, a lower cutting edge Oa is provided at the upper edge of the opposing surface of the first seventh sectional die 6 and the second sectional die 7.

7a, and the main punch 2 that bites between the first sectional die 6 and the second sectional die is provided. Corresponding upper cutting edge 2a, 1
All you have to do is form 2.

Despite having a plurality of cutting edges, the punch 8 itself can be made smaller.

In addition, in the above embodiment, the upper cutting edge 2 of the main punch 2
a and the upper cutting edge 10a of the auxiliary punch 10 are arranged at the same height. For example, the upper cutting edge 1 of the auxiliary punch 10
If 0a is formed slightly lower, the main punch 2 can be driven deeper between the first 7th sectional die 6 and the second sectional die 7, so the cutting can be performed by moving the punch 8 to the lower side. can be made smoother.

Furthermore, the die-hide changing means is not limited to the above-mentioned embodiment, and it is also possible to change the die-hide by adjusting the stroke of the slide, or to provide a sill for driving the punch in the vertical direction.

(Effects of the Invention) As explained above, according to the sheet metal material cutting method of the present invention, when cutting continuously supplied sheet metal materials along appropriate cutting lines, lower 9J blades of different heights are used. The sheet metal material is supplied between a die provided with the die and a punch provided with an upper cutting blade corresponding to each of the lower cutting blades, and different cutting lines are obtained by changing die hides of the die and punch. , the cutting die used to carry out this method is arranged such that the lower cutting edge sides of the first sectional die and the second sectional die, which have different heights, face each other, and each sectional die is placed in approximately 180° rotationally symmetrical positions. and a punch having an upper cutting edge corresponding to the lower cutting edge of each of the sectional dies,
Since the die-hyde can be changed, the cutting line of the sheet metal material can be changed with just one cutting die.1 For example, if you select an effective cutting line each time for various product shapes, you can Since individual wood and filler materials suitable for various processing can be obtained, productivity can be improved and costs can be reduced, and in addition, mold manufacturing costs can be significantly reduced. .

[Brief explanation of drawings]

1 to 6 show one embodiment of this invention. Figure 1 is a perspective view of the punch with the cutting edge facing upward, Figure 2 is a perspective view of the structure of the tie, and Figure 3 is a plan view of the arrangement of the tie when the die cuts sheet metal material. , FIG. 4 is a bottom view illustrating the punch facing the die shown in FIG. 3, FIG. 5 is a cross-sectional view of the main punch portion illustrating the cutting shape due to changes in die hide, and FIG. 6 is the diagram shown in FIG. 3. FIG. 4 is a plan view illustrating the sheet metal material cut by the punch and die, and FIGS. 7 and 8 are plan views illustrating other shape examples of the tie, and FIG. Plan views of the obtained sheet metal material, Figures 9 and 10
The figures are a plan view illustrating still another shape example of the die, a plan view of a sheet metal material obtained using the die shown in FIG. 9, and FIG. 11 is a plan view illustrating a conventional cutting type die. . 3...Sheet metal material, 5.15.25...Die. 6.16.26...First sectional die, 6a12
6 &... lower cutting blade, 7.17.27... second sectional die, 7a...
・Lower cutting blade, 8... Punch, 11... Upper cutting blade. 12...Second upper iiR cutting blade, 14...Adjustment plate. Patent Applicant: Nissan Motor Co., Ltd. Representative Patent Attorney Yutaka Koshio Figure 3 Figure 4 Figure 5 Figure 6 Figure 1 Tomoe Figure 7 Figure 8 FI! J Figure 9 Figure 1O

Claims (2)

[Claims] (1) When cutting continuously supplied sheet metal materials along appropriate cutting lines, a die with lower cutting blades of different heights and a punch with upper cutting blades corresponding to each of the lower cutting blades are used. A method for cutting a sheet metal material, characterized in that different cutting lines are obtained by changing the die height according to the height of each of the lower cutting blades. (2) The lower cutting edge sides of the first sectional die and the second sectional die, which have different heights, are arranged to face each other, and each sectional die is also arranged at approximately 180° rotationally symmetrical positions to form an approximately X-shape. and a punch having an upper cutting edge corresponding to the lower cutting edge of the first sectional die and an upper cutting edge corresponding to the lower cutting edge of the second sectional die, and the die and/or the punch A cutting die for sheet metal material, characterized by a changeable die height.