JPH0344850B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic metal casing device used in television tuners, etc., and in particular, a metal case is punched out in a progressive press mold, and press processing such as ejection, burring, and bending is performed. Later, cutting, conveying, and fitting are performed continuously within the same mold in an attempt to shorten the time required to assemble the case.

Fig. 1 is a perspective view of the case, and Fig. 2 is a developed view of the case. In this type of case, the side plates 2a and the partition plate 2b on three sides are twisted and connected by the connecting part 2c. It is constructed by combining a punched case main body 2 with a separate side plate 1 on the other side. This is because the side plate 1 cannot be integrated with the main body part 2 due to the layout of the side plate 2a and the partition plate 2b.
It is processed separately and then put together. The conventional method for assembling the side plate 1 and the main body 2 is to bend the main body 2, then insert the pawl 2d of the main body 2 into the square hole 1a of the side plate 1, and then tighten the pawl 2d by hand or with an automatic machine. Although it can be used with scissors, it has the disadvantage of poor work efficiency.

The present invention has been made in view of the above-mentioned points, and eliminates the above-mentioned drawbacks by employing the structure described below in the progressive press die.

Embodiments of the present invention will be described in detail below with reference to the drawings.

3 to 5 are sectional views of essential parts inside the press die, and FIG. 6 is an exploded perspective view. In the figure, 4
is a punch plate, and on the upper part there is a packing plate (not shown) and a punch holder, and the punch holder is fixed to the ram surface of the press sliding part. 5 is a first cam, and this cam 5 is housed and fixed in the punch plate 4. 6 is a second cam, and the cam 6 is formed with inclined surfaces 6a and 6b. The inclined surfaces 6a and 6b of the cam 6 abut against the inclined surfaces 5a and 5b of the cam 5. A hole 6c for accommodating the coil spring 7 is provided in the cam 6 from above. Also, the cam 6 has a female punch 8.
A horizontal through hole 6d for accommodating the hole 6c is provided perpendicularly below the hole 6c. The punch 8 can be slid within the horizontal through hole 6d of the cam 6. Reference numeral 9 denotes an operating member, and this operating member 9 is inserted into a vertical through hole 6g formed at the bottom of the hole 6c of the cam 6, and is capable of sliding within the through hole 6g.

The cam 6 also has a cutting edge 6e for separating the connection piece 3 between the side plate 1 and the case body 2 from the side plate 1, a collar 6f for preventing the cam 6 from coming off downward, and a side plate 1 is provided with a guide convex portion 6h on the upper end surface 1b.

10 is a stripper insert placed on both sides of the moving front side of the cam 6;
The cutting edge 10a cooperates with the cutting edge 6e of the cam 6 to cut and separate the side plate 1 and the connecting piece 3 along the cutting line 3a, and the side end face 1d is used when transporting the cut side plate 1. Guide surface 10 for guiding
b is provided.

11 is a stripper plate, and inside this stripper plate 11 are cams 5 and 6.
However, the respective inclined surfaces 5a, 5b and 6a, 6b
It is housed so that it can freely swing in a state where it is in contact with the Further, the stripper insert 10 is housed in the stripper plate 11 in a press-fitted state.

The operating member 9 is provided with a vertical movement transmitting portion 9a for the punch plate 4, a receiving portion 9b for the spring 7, and inclined surfaces 9c and 9d. The eye punch 8 has a tooth edge 8 for inserting the eye claw 2d on the side plate 2a.
a and an inclined surface 8b, and the operating member 9 is housed in a state in which inclined surfaces 9c and 9d are in contact with the inclined surface 8b of the punch 8.

Reference numeral 12 denotes a die plate, and at the bottom of the die plate there is a packing plate (not shown) and a die holder, and the die holder is fixed to the bolster part of the press machine. Further, the punch plate 4, stripper plate 11, and die plate 12 are positioned and guided in a movable state by a pin (not shown) fixed to the punch plate 4, and the punch plate 4 and the receiver Board 13
A space 14 in between is provided with a fixed space 14 that is movable by a bolt having a convex positioning stopper attached to the bolt shaft and a spring.

The die plate 12 has a receiving hole 12 for the cam 5.
a is provided, and the upper surface 1 of the die plate 12
2b serves as a guide surface for the lower end surface 1c of the side plate 1.

The receiving plate 13 is fixed to the stripper plate 11 with bolts. This receiving plate 13 is provided with a vertical motion transmitting portion 9a of the operating member 9 and relief holes 13a and 13b for the cam 5.

Next, to explain the operation of the present invention, first,
Figure 7 shows the processing state up to the middle of a case that is automatically assembled by cutting, bending, transporting, and mechanically using the device of the present invention, and is shown in the previous process of the same mold in which the device is incorporated. It is processed as follows. That is, the side plate 1 and the main body part 2 are connected to the connecting piece 3
The side plate 1 and the partition plate 2b are pressed at the same time in a connected state, and then sent into the process of the apparatus of the present invention by the feeding device of the press machine to form the stripper plate 11 and the die. The side plate 1 and the main body part 2 are set in the plate 12 together with the connecting piece 3. After that, as the press ram surface descends, the cutting edges (not shown) provided on the stripper plate 11 and die plate 12 first
The connecting piece 3 and the side plate 2a are cut and separated at the cutting separation line 3a, and then the side plate 2a is bent so as to stand upright. FIG. 3 shows this state. Further, when the surface of the press ram continues to descend from this state, the inclined surfaces 5a and 5b of the cam 5 come into contact with the inclined surfaces 6a and 6b of the cam, and the cam 6 moves along the inclined surface inside the stripper plate 11. is moved in a direction substantially perpendicular to the pressing direction of the press (rightward in FIG. 3), and the side plate 1, which remains connected to the connecting piece 3, is conveyed in the direction of the stripper insert 10. During this conveyance process, the side plate 1 is passed through the cutting edge 10a of the stripper insert 10, and as shown in FIG. 8, the side plate 1 is cut and separated along the cutting line 3b between the connecting piece 3, and the cutting is completed. The side plate 1 is in a state in which each end surface 1b, 1c, 1d of the side plate 1 is guided by a total of four surfaces: the guiding convex portion 6h of the cam 6, the guide surface 10b of the stripper insert 10, and the upper surface 12b of the die plate. It is conveyed in the direction of the side plate 2a. The connecting piece 3 is not necessary for assembling the case and will be removed later. At the final stage of this conveyance process, the ninth
As shown in FIGS. 1 and 10, the claws 2d of the side plate 2a are inserted into the square holes 1a of the side plate 1. FIG. 4 shows the state of the mold at this time. Note that this is when the cam 6 has finished moving forward, and is also when the lower surface of the punch plate 4 comes into contact with the vertical motion transmitting portion 9a of the operating member 9. When the punch plate 4 continues to descend further from this state, the punch plate 4 pushes down the operating member 9, and the inclined surfaces 9c and 9d of the operating member shown in FIG. The punch 8 slides in the horizontal through hole 6d of the cam 6 and moves forward in the direction of the claw 2d, so that the knife edge 8a opens the claw 2d both upward and downward, as shown in FIG. Complete. 1st
Figure 1 shows the part where the claw 2 is opened to both sides.
It is also the lowest point of the descent of the press ram surface when the adjustment is completed.

Next, the press ram surface begins to rise, and the side plate 1 and main body part 2 attached to the bending punch attached to the stripper plate 11 are assembled into one piece by a screwdriver and removed by the stripper fixed to the die plate. It is discharged from the mold and processing is completed.

As described above, the present invention provides a press die in which a cam that moves in a direction substantially perpendicular to the downward direction of the press ram in response to the downward movement of the press ram is provided with means for cutting, conveying, and snapping a member to be pressed. Therefore, each of these steps was performed while the press ram was moving up and down.
Since it can be operated reliably, the members to be pressed that have been cut and separated into a plurality of pieces can be automatically and reliably integrated, and there are effects such as good work efficiency.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the final shape of the case, Fig. 2 is a plan view of the case developed, Figs. The figure is an exploded perspective view of the same part, Figures 7 to 9 are perspective views showing changes in the parts from the start to completion of machining the case, Figures 10 and 11 are cross-sectional views showing before and after fitting. It is a diagram. DESCRIPTION OF SYMBOLS 1... Side plate, 2... Case body part, 4... Punch plate, 5... First cam, 6... Second cam, 8... Mechanical punch, 9... Operating member, 10...
... Stripper insert, 11... Stripper plate, 12... Die plate, 13... Receiving plate.

Claims (1)

[Claims] 1. A punch plate that descends in response to the descending movement of the press ram; a first cam that is fixed to the punch plate and has an inclined surface that engages with a second cam; and a cutting edge. a stripper insert fixed on the die plate, an inclined surface engaging the first cam, a cutting edge, a vertical first through hole, and a horizontal second through hole. , during the first downward stroke of the punch plate, the first cam engages with the inclined surface and moves on the die plate in the direction of the stripper insert to cooperate with the cutting edge of the stripper insert. a second cam that cuts a connecting piece between pressed members placed on the die plate with the cutting edge; and a second cam that has an inclined surface and is slidable into the first through hole. an operating member that is accommodated and pushed downward by the punch plate during a second descending stroke following the first descending stroke of the punch plate; and an operating member that is slidably accommodated within the second through hole an inclined surface and a cutting edge that engage with the inclined surfaces of the punch plate, and the second through hole is opened by the engagement with the two inclined surfaces by the downward stroke of the operating member during the second downward stroke of the punch plate. 1. An automatic punching device comprising: a punch that moves in the direction of the pressed members within the die plate, and presses the pressed members placed on the die plate whose connecting pieces have been cut with the cutting edge of the punch.