JP2599405B2 - Extra punching method of plate material by punch press - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a sheet material additional punching method for performing additional punching along a contour of a product.

(Prior Art) Conventionally, for example, in a turret punch press, in order to perform an additional punching process on a plate material, an additional punching process is performed using a die having a rectangular cross section at a punched portion.

(Problems to be Solved by the Invention) In the conventional punching method of a plate material by a punch press, since the cross-sectional shape of a punched portion of a die (punch) is rectangular, each side of the rectangular shape is used. Is generated during the punching process, but no portion is generated at the portion corresponding to the corner of the additional punched portion. Then,
When the additional punching process is performed, a portion corresponding to the corner portion remains in a dot shape without dripping. Therefore, for example, when the product is cut and separated from the plate material by additional punching, a portion that does not cause dripping remains in the contour of the product at a predetermined pitch,
There are problems such as impairing the appearance and various inconveniences in the post-process, requiring additional processing, and the like.

(Means for Solving the Problems) In view of the conventional problems as described above, the present invention performs additional punching along a contour of a product by using a punch having a rectangular cross section at a punched portion. In the additional punching method, the punching process is performed in advance at a position close to a plurality of portions where the angle of the rectangular punching compound portion in the punch is sheared along the contour line, and the punching process is performed at the plurality of portions of the contour line. (A) a step in which drooping is generated in advance, and an additional punching process is performed along the contour line so that the corners of the rectangular punching portion of the punch are aligned with the previously punched portion (b) And a punching method for a plate material by a punch press.

(Operation) According to the above configuration, when a punching process is performed along a contour of a product using a punch having a rectangular cross section at a punched portion, a portion where no droop occurs corresponding to a corner of the punched portion is obtained. Although it tends to remain in a point-like manner at a predetermined pitch, a plurality of portions where the above-mentioned portions are sheared along the contour line are subjected to punching in proximity to the plurality of portions, thereby causing drooping in advance. Therefore, when the additional punching process is performed along the contour line, a portion that does not cause a droop corresponding to the corner is eliminated.

Therefore, for example, when a product is cut off and separated from a plate-shaped work by over-lapping, a part of the periphery of the product is in a state of being generated over the entire circumference, and a part where no generation occurs remains in a dot shape. And the appearance is improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 2, an upper frame 5 is provided integrally with the base 3 above the base 3 in the turret punch press 1.

A disc-shaped lower turret 7 and an upper turret 9 are respectively mounted on the base 3 and the upper frame 5 so as to be rotatable in opposition to each other. The upper turret 9 and the lower turret 7 rotate in the same direction synchronously, and a plurality of dies 11 are mounted on the lower turret 7 in a concentric circle. A plurality of punches 13 corresponding to the die 11 are mounted on the upper turret 9. At a fixed position of the upper frame 5, a striker 15 for pressing the punch 13 is mounted so as to be able to move up and down.

A work movement positioning device for moving and positioning the work W in the front-rear and left-right directions is mounted on the base 3. That is, guide bars 17 extending in the left-right direction in FIG. 2 (one side guide bar is shown in FIG. 2) are attached to both side surfaces of the base 3. Are respectively slidably supported by sliding bodies 19. The sliding members 19 on both sides support the vicinity of both ends of the second guide bar 21. The second guide bar 21 extends over the upper surface of the table 23 attached to the upper portion of the base 3, and
, And near both ends thereof are supported by the sliding members 19 on both sides as described above.
The second guide bar 21 movably supports a work clamp device 25 for holding one side edge of the work W.

In the turret punch press 1 having the above configuration, the work W is placed on the table 23 and the work W
Is clamped and fixed by the work clamp device 25.
Next, the slide body 19 is appropriately slid along the guide bar 17 and the work clamping device is moved along the second guide bar 21.
After the workpiece W is moved to position the workpiece W in the front-rear and left-right directions, the punch 13 is pressed by the striker 15 to perform punching.

At a position close to the punching position where the punching is performed as described above, a work discharge device 27 provided with a swing mechanism on a table divided into a plurality of parts is mounted to receive and discharge a product or scrap separated from the work W. ing.

Next, a method of punching a sheet material W by the punch press 1 according to the present invention is shown in FIGS. 1 (A), (B) and (C). That is, in FIG. 1A, when cutting and separating the product H from the workpiece W, first, the contour line 20 of the product H is set in advance. In addition, a parallel proximity line 31 that is separated from the contour line 29 by a small distance X is set in advance. Next, prior to performing a punching process for cutting and separating the product H from the work W by performing a punching process along a contour line 29 of the product H by using a punch having a rectangular cross section of a punched portion, The corners of the rectangular punching portion in the punch are subjected to appropriate shape punching in advance at positions 33A and 33B close to a plurality of portions that are sheared along the contour 29, and the punching of the contour 29 is performed. Who is generated in each part in advance.

Thereafter, as shown in FIG. 1C, when a punching process is performed along the contour line 29 using a punch having a rectangular cross section at the punching portion, the corner of the punching portion of the punch is formed. The parts correspond to the positions 33A and 33B. Therefore, the corners are sheared along the contour line 29 at each of the plurality of portions, and a drooping occurs beforehand, and a portion corresponding to the corners without drooping remains in a dot shape. Things.

As a result, the entire product is in a state of being drooped along the contour line of the additionally punched product, and a portion where no dripping is left does not remain in a dot-like manner, so that the appearance can be improved.

[Effects of the Invention] As can be understood from the above description of the embodiments, in short, the present invention uses a punch having a rectangular cross section at a punched portion to form a contour (29) of a product (H). In the over-punching method for performing over-punching along, the angle of a rectangular punching portion of the punch is determined by the contour line (2
(A) a step of preliminarily punching a portion adjacent to a plurality of portions to be sheared along 9) to form a droop in the plurality of portions of the contour line (29) in advance; A step (b) of performing additional punching along the contour line (29) so that the corners of the punched portion of the shape are aligned with the previously punched portions; It is.

As is apparent from the above configuration, in the present invention, when performing punching along the contour line 29 of the product H using a punch having a rectangular cross section at the punching portion, a rectangular punch A punching process is performed in advance at a position where a corner of the processed portion is close to a plurality of portions where the shearing is performed along the contour line 29, and a drooping is generated in the plurality of portions in advance (step a). In addition, the punching process is performed along the contour line 29 by aligning the corners of the punch with a plurality of the above-mentioned portions (step b). It becomes a mode in which who has occurred over the entire length along the contour line 29, and a portion that does not generate wholly does not remain in a point shape at a predetermined pitch,
The conventional problem can be solved.

[Brief description of the drawings]

1 (A), 1 (B) and 1 (C) are explanatory views for explaining the working order of the additional punching method of the present invention, and FIG. 2 is a schematic front view of a turret punch press. 1 Turret punch press 11 Die 13 Punch 29 Contour line W Workpiece H Product

Claims (1)

(57) [Claims] 1. A punching method for performing punching along a contour line (29) of a product (H) using a punch having a rectangular cross section at a punching portion. A punching process is performed in advance at a position where the angle of the portion is close to a plurality of portions where the shearing is performed along the contour line (29), and a drooping is caused in advance at the plurality of portions of the contour line (29) (a And (b) a step of performing an additional punching process along the contour line (29) so that the corners of the rectangular punched portion of the punch are aligned with the previously punched portion. An additional punching method of a plate material by a punch press.