JPS6324980Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention performs a scrap press punching process that eliminates material loss by appropriately selecting the width and board size of the punching material depending on the shape of the punched product. This invention relates to a punching device in which each punching board is laminated and connected in the final process and then taken out.

(Prior art) In this type of scrap press punching, when punching I-shaped cores and E-shaped cores constituting an electromagnet core, for example, as shown in FIG. The part 2 corresponding to the I-shaped core is punched out as indicated by diagonal lines, and in the next step, the center of the hole 2a where the I-shaped core is punched out and the center of the next I-shaped core punched part are cut in the width direction. The E-shaped cores 3 and 4 are formed by punching. This E-shaped core 3 is pushed into the die and discharged, but another E-shaped core 4 is slid down this slope by an inclined surface 6 at the end of the punching table 5 that transfers the punched material. It is set as.

In addition, with ordinary punching equipment other than a scratch press, when punching laminated iron core plates, appropriate connecting protrusions are formed prior to blanking, and the punched plates are laminated and connected within the blanking die. For example, it is shown in US Pat. No. 3,202,851. In order to separate the iron cores connected in this way for each car, it is also possible to provide holes in the punched plates of the divided parts instead of connecting protrusions so that they are not connected. This is indicated in official gazettes, etc.

(Problem to be solved by the present invention) However, in the scratch press punching device, as explained in FIG. The punched plate 3 is pushed into the die, but another punched plate 4 is taken out as it is, so it is necessary to stack them separately and apply pressure to engage the connecting protrusions and connect them. There are drawbacks such as the need for two types of equipment, which is cumbersome and reduces work efficiency.

(Means for solving the problem) Therefore, in the present invention, connecting protrusions are formed in the previous punching process, and the punched plates are first punched in the respective dies by the punching pressure of the punch. In addition to engaging and connecting with the punched punching board, the punching board formed at the front end of the punching material during the final punching process and left on the punching table moves up and down with the punching punch. The cores are sequentially pushed into the lower side of the punched board storage frame by a punching operation, and the cores in the punched board storage frame are pressed from above and connected.

(Examples and effects) This will be explained with reference to an embodiment shown in the drawings.

In the embodiment shown in FIGS. 1 to 3, 1
is the punching material, 2 is the I-shaped core, 2a is the punched hole,
Numerals 3 and 4 are E-shaped cores, and 7 is a connecting protrusion, which is extruded in a V-shape with cut surfaces on both sides, for example. 8,9
is a cutting line from the final punching, which punches out the E-shaped core 3 and at the same time forms another E-shaped core 4 at the front end.

The punching material 1 is fed along a guide rail 12 on a punching table 11 by a feeding device (not shown), and in a first step, a connecting protrusion punch 13 forms connecting protrusions 7 at predetermined locations. The punched material sent to the second process is punched into the I-shaped core 2 by the I-shaped core punch 14.
is punched out, and E-shaped cores 3 and 4 are cut and formed using a cutting punch 15 in the third step. 16 is a punch holder.

The punching material 1 is held by a guide rail 12 and fed while maintaining the positions of both side edges accurately, and the punching material is aligned with a predetermined position on the punching table 11 to perform punching.

The punched I-shaped core 2 and one of the E-shaped cores 3 are pressed by punching pressure to the previously punched cores in the dies 17 and 18, respectively, to engage and connect the connecting protrusions 7, and to receive them. Push down the tables 19 and 20. The connecting protrusion 7 is, for example, disclosed in the above-mentioned Japanese Patent Application Laid-open No. 52-
As shown in Japanese Patent No. 137610, the iron cores can be separated one by one, and when the cradle 19, 20 is lowered to a discharge position (not shown), the cores for one core are discharged in a stacked state by a take-out device.

The other E-shaped core 4 formed by the cutting punch 15 is attached to the punching board 4 by hooks 22 provided at the lower ends of both sides of the punching board storage frame 21 that descends with the punch on the punching table 11. Hit, spring 2
3 and engages with the lower surface of the E-shaped core 4, and the core 4a, which was previously punched out and held in the punching plate storage frame, is pushed onto the punching table 11 by the punching pressure. It is pressed by the E-shaped core 4 to engage and connect the connecting protrusion 7, and the E-shaped core 4 is stored in the lower side of the punching board storage frame and lifted by the hook 22 as the punch rises. . In this way, the cores stored in the punching board storage frame 21 sequentially from the bottom push up the press plate 25, and the connected cores for one unit stored in the upper side are released from the discharge port 26 at the top of the punching board storage frame. When raised to this position, the push-out arm 27 is actuated by the actuator 28, and the connected punching plate 4a is ejected.

(Effects of the present invention) As described above, in the present invention, in a scratch press punching device, a punching plate that is pushed into the die in the final process and another punching plate that is left on the punching table are formed, but one of the punching plates is Because it is pushed into the die by the cutting punch, it is stacked and connected within the die using the connecting protrusions that have been machined in advance, and another punching board is pushed into the underside of the punching board storage frame that moves up and down with the cutting punch. Due to the pressure generated when the punching board is pressed, each punching board is stacked and connected to the previously punched board stored in the punching board storage frame, and is ejected from the top of the storage frame. Each layer is stacked and connected by the punching operation, eliminating the need for separate stacking and connecting operations, which improves productivity.Since they are connected at the time of punching, the stacking accuracy is good, and they can be sent directly to the assembly equipment. It has the advantage of being able to easily automate everything from materials to assembly.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing an embodiment of the present invention, Fig. 2 is a plan view showing the punched state, and Fig. 3 is Fig. 1 A-A.
FIG. 4 is a cross-sectional view along the line, and is an explanatory diagram of a punching state in a conventional punching device. 1 is a punching material, 2 is an I-shaped core, 3 and 4 are E-shaped cores, 11 is a punching table, 21 is a punching board storage frame,
22 is a hook, 24 is a back pressure device, 25 is a press plate, 26 is a discharge port, and 27 is an extrusion arm.

Claims (1)

[Scope of utility model registration request] A final punching step by means of a scratches punching machine yields a stamped board and another stamped board formed by this punching at the front end of the blanking board material, each stamping board being In the punching device, which processes connecting protrusions on each of the punching plates and connects them in the final punching process, the punching machine moves up and down together with the punch in the final punching process, and the punches formed at the front end of the punched material are moved up and down together with the punch in the final punching process. A punching board storage frame for storing the board, hooks for holding the punching board on both sides of the lower end of the punching board storage frame, and the upper part of the punching board stored sequentially from the bottom inside the punching board storage frame. The punching machine is equipped with a back pressure device that engages and connects the connecting protrusions by pressurizing the punching board, and has a discharge port provided at the top of the punching board storage frame to discharge the punching boards that are connected within the frame. Device.