JPH0239624Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an end processing device for pressed products.

(Prior Art) When sheet metal processing is performed using a press, it is usual to go through a process for end treatment such as cutting off unnecessary parts. FIGS. 5 and 6 show an example of conventional equipment used in this process.

In this example, the pressed product P is placed on the fixed base 1.
is set, and at this point, it is fixed with a pressing pad 5 suspended from the movable base 3, and as the movable base 3 descends, the cutter attached to the opposite edge of both bases 1 and 3 is pressed. The terminal part (scrap) is cut off.

(Problem to be solved by the invention) By the way, when the pressed product P has an arcuate cross section as shown in the figure, the shape of the cutting edge 7 of the movable base 3 is set to be smaller than the curvature of the pressed product P. is common. This is because both ends of the press product P are difficult to cut, so the press product P is cut while being squeezed.

However, since the pressed product P is cut in this way, the pressed product P is crimped along the cutting edge 7 due to spring back, and as in the case of oil adhesion, there is a possibility that the scrap will fall off. This causes problems. Therefore, in order to solve this problem, a device was developed in which an ejector pin 10 is provided at the top of the cutting edge 7 (see FIGS. 7 and 8). However, by attaching this pin 10, there is a risk that the strength of the cut edge 7 portion will be reduced, and if it breaks, it will cause damage to the bases 1 and 3, making maintenance difficult.

Therefore, this invention improves the terminal processing device,
Made it possible to cut off scraps reliably.

(Means for solving the problem) In order to achieve this objective, the present invention is configured as follows. That is, it is an end processing device for shearing off the end portion of a pressed product bent into an arc shape, and includes a fixed base on which the pressed product is set, and an end portion facing the fixed base so as to be movable up and down. and a movable base having a curved cutting edge with a smaller curvature than the curvature of the pressed product, and the top of the cutting edge is provided with a movable base that allows the end portion to reach its elastic limit before cutting off the end portion. We decided to form a recess that could be folded inwards.

(Function) Therefore, according to the above structure, the pressed product is set on the fixed base, and the movable base is lowered from this position, thereby cutting off the end. Here, when cutting off the movable base, since the cutting edge of the movable base is formed with a smaller curvature than that of the pressed product, the end portions are cut off from both ends toward the top. When the portion corresponding to the recess is finally cut off, the end portion is folded around the recess beyond its elastic limit, so that the scrap can be reliably separated from the cut edge.

(Example) Hereinafter, an example embodying the present invention will be described in detail with reference to the drawings.

1 to 4 show an embodiment of the present invention, in which a fixed base 1 is formed in an arch shape, and a pressed product P can be set in close contact with the fixed base 1 along its length. It's becoming like that. Further, a cutter 2 is attached along the circumferential direction to the upper edge on the near side in the drawing.

The movable base 3 faces above the fixed base 1, and can be raised and lowered by a lifting device (not shown). In addition, a recess 4 is provided on the lower surface of the movable base 3.
is formed, and a press pad 5 that can be brought into close contact with almost the entire surface of the pressed product P is housed here.
This pressing pad 5 is suspended and supported from the lower surface of the movable base 3 by an appropriate number of springs 6. Furthermore, a cutting edge 7 smaller than the curvature of the pressed product P is formed in an arch shape on the front side surface of the movable base 3, and a cutter 8 corresponding to the cutter 2 on the fixed base 1 side is provided here in the circumferential direction. installed along the Furthermore, a semicircular recess 9 is continuously formed at the top of the cutting edge 7, and when cutting off a portion of the press product P that corresponds to the recess 9, the scrap S is made with this as the center. can be bent in the direction of folding.

Subsequently, the functions and effects of this example formed as described above will be specifically explained.

First, press product P bent into an arc shape
is set so as to cover the fixed base 1. At this time, the end of the pressed product P is made to protrude toward the front in the figure by the length to be cut off (scrap). When the movable base 3 is lowered in this state, the pressing pad 5 first presses and holds the entire pressed product P by the spring force.

When the movable base 3 further descends, the cutting edge 7 of the movable base 3 is set to be smaller than the curvature of the pressed product P, so as the movable base 3 descends, the scrap S is directed from both ends to the top. As it is cut in turn, it is gradually narrowed inward (see Figure 3). As the cutting progresses in this way, the scrap S is cut into the recess 9.
Only the parts that correspond to this will be left. and,
When the movable base 3 descends to cut this,
The scrap S follows the curved shape of the recess 9 and is forcibly squeezed, thereby being bent beyond its elastic limit. Therefore, the scrap S is cut away from the cutting edge 7, and unlike the conventional method, it does not remain pressed against the cutting edge 7 due to spring back or oil adhesion.
It can be dropped and ejected reliably.

(Effects of the invention) As is clear from the above explanation, according to the present invention, when cutting off the end of a pressed product bent in an arc shape, the scrap can be reliably separated from the cut side, so the end treatment process Contribute to the facilitation of

[Brief explanation of the drawing]

Fig. 1 is a front view of the device of this example, Fig. 2 is a side sectional view showing the cutter portion, Figs. 3 and 4 are operation explanatory diagrams, and Figs. 7 and 8 are explanatory diagrams of the operation of other conventional devices, respectively. 1... Fixed base, 3... Movable base, 7...
Cut edge, 9... recess.

Claims (1)

[Scope of utility model registration request] The terminal part of the pressed product is bent into an arc,
An end treatment device for cutting off by shearing, which includes a fixed base on which a pressed product is set, and a cutting edge facing the end portion that faces the fixed base so as to be movable up and down, even if the cutting edge has a smaller curvature than the curvature of the pressed product. a movable base formed in a curved manner, and a recess is formed at the top of the cutting edge so that the end portion can be folded inward beyond its elastic limit prior to cutting off the end portion. A terminal processing device for pressed products featuring: