JPS591027A - How to turn the workpiece in progressive machining - Google Patents

Abstract

PURPOSE:To enable highly accurate work at low cost using a die of relatively simple structure by connecting a band plate and a work with a connecting part which is unified with the work, and performing bending at right angles in the same direction successively at two different positions of the connecting parts. CONSTITUTION:Holes 4, 4 are pierced in the first process and bending at right angles is performed at positions (a) in the connecting parts 6, 6 in the second process. At this time, the work 5 becomes in the direction at right angles to a band plate 3. In the third process, the work 5 is inverted by performing bending at right angles in the same direction with the second process at positions (b) of connecting parts 6, 6. At this time, the work 5 becomes nearly parallel to the band plate 3. However, they are not on the same plane, and when positions (a), (b) are l1, l2 in distance from the center line of the work 5, it becomes a position of a fixed distance (l1+l2) off from the band plate. Since inversion of the work 5 is made possible, working can be made from the front and back of the work 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a processing method in which a strip plate is press-formed in a progressive process, and more particularly to a method of inverting a workpiece during the progressive process.

Conventionally, there was no method for reversing this type of work, so for example, as shown in Fig. 1 (Fig.
If the direction b is specified for the front and back, or if the direction of
4) As shown in (B), bend the workpiece 2 at two places.
In the case where the bending direction is specified for the front and back sides in the bending process to provide m and 2b, problems such as the mold structure becoming complicated and the scrap generated during the punching process having to be disposed of with the upper die may occur. there were.

For this reason, especially when the processed product is complex, the mold structure becomes complicated, and it is also disadvantageous in terms of cost.

This was done by focusing on the conventional situation in which the present invention was made.
In order to enable reversal of the workpiece in progressive milling, the strip plate and the workpiece are connected by a connecting part that is integrated with the strip plate and the workpiece,
The present invention provides a method for reversing a workpiece by sequentially performing right-angle bending in the same direction at two different locations on the joint, thereby solving the above-mentioned drawbacks of the conventional art.

Embodiments according to the present invention will be described in detail below with reference to FIGS. 3(A), 4(B), and FIG.

Figure 3 explains the process of progressive machining in three stages, where 3 is the metal strip to be machined, 4 and 4 are the punched holes, 5 is the workpiece, and 6 and 6 are the two parts. The book connecting part is integrally connected to the sifter feeder. This connecting part 6.
6 is configured in the shape of a symmetrical crank on both sides of the workpiece 5. In addition, 8 is a kneading machine.

In this configuration, first, in the first step, a punched hole 4.4 is punched out, and in the second step, a right angle bending process is performed at each position a of the connecting portion 6.6. At this time, the workpiece 5 is oriented approximately at right angles to the strip plate 3 as shown in the figure. Next, in the third step, the workpiece 5 can be reversed by performing right angle bending in the same direction as in the second step at each position b of the connecting portion 6.6.

At this time, the cut 5 is approximately parallel to the strip plate, but not on the same plane, as shown in FIG.
, b from the center line of the work 5, respectively.

If the position is t2, as shown in FIG. 3(B), the strip plate 3
The position is a certain distance (z1+tz) away from the point.

Since the tool 250 can be reversed in this way, the machining direction can be performed from both the front and back of the tool 250. Even in the case of complex workpieces, it can be easily performed using a mold with a relatively simple structure, and it is inexpensive. It also has the effect of allowing highly accurate machining.

In this embodiment, a case is shown in which the workpiece 5 is formed on the lower side of the strip 30, but if the bending direction at the bending positions a and b is reversed to that in this embodiment, the strip can be formed. It is clear from the plate 30 that a groove for forming the workpiece 5 can be formed on the upper side.

In addition, in this embodiment, as shown in FIG.
b was set at the same distance (t1 = t2) from the center line of the workpiece 5 so that the inverted workpiece 5 was formed on the same center line as the workpiece 5 before inversion, but the distance L between the bending positions a and b
Of course, if 1*L2 is appropriately set to a predetermined dimension, the inverted workpiece 5 can be set at any predetermined position in the middle direction of the strip plate 3.

Further, in this embodiment, the case where the workpiece 5 is in the shape of a disk has been described, but it may be a plate of any shape or a processed product in which drawing, bending, etc. are performed on any shape. The workpiece can be reversed in the same way as in the embodiment.

In addition, in this embodiment, the case where the connecting part 6.6 is connected to the feeder 9 T at two places separated in the direction of the line of symmetry is shown, but the connecting part is not limited to this, and the connecting part may be at one place, or it can be connected to any Even in this case, the connecting portion between the workpiece 5 and the main body of the strip plate 3 may be the feeder T or the kneading machine 8.

As explained above, according to the present invention, the strip plate and the workpiece are connected by connecting portions provided at one or two locations, and by sequentially performing right angle bending in the same direction at two different locations of the connecting portions, By making it possible to reverse the workpiece during conveyance machining, the workpiece can be easily machined from both the front and back sides, and even complex workpieces can be processed at low cost and with high precision using a mold with a simple structure. This has the advantage of being relatively easy to implement.

[Brief explanation of drawings]

Figure 1 (4), @ and Figure 2) and 03) are diagrams showing examples of processed products processed using conventional processing methods, respectively.
(G) is a plan view, (B) is a vertical cross-sectional view of (G), and Figure 3 (4) is a plan view.
) and (B) are diagrams explaining the process of progressive 9 processing according to one embodiment of Mokiyomei, (2) is a plan view, (6) is a front view of the case, and Figure 4 is Figure 3. FIG. 3 is an enlarged plan view of the main part showing the bending position of the connecting portion shown in FIG. 3... Band plate 4... Punching hole 5... Workpiece
6... Connecting part 7... Feeding machine 8... Edge machine agent Makoto Kuzuno (1 person)

Claims (1)

[Claims] In a processing method in which a band plate is press-worked by progressive cutting, a work piece is formed by press-working the band plate in a connected state with connecting portions provided at one location or at two locations separated in the direction of a line of symmetry. . A method for reversing a workpiece in progressive machining, characterized in that the workpiece is reversed by sequentially performing right angle bending in the same direction at two different locations of the connecting portion.