JPS61266133A - Pressing device - Google Patents

Abstract

PURPOSE:To perform a cutting and punching in one stage and to reduce the work man-hour and press die cost by performing a punching by cutting the end edge of a work by advancing in order the first and second passive cams provided on the lower die by the first and second active cams fixed to the upper die by descending the upper die. CONSTITUTION:The first passive cam 5 is advanced with the rear face of the first active cam 18 coming into contact with the front face of a backup member 10 and with the taper face 19 of the first active cam 18 coming into contact with the taper face 8 of the first passive cam 5 when the upper die 16 is descended. The end edge W1 of a work W is cut by a mobile cutting blade 7 and stationary cutting blade 3 then. In this case the first active cam 18 fits into between the rear face 9 of the first passive cam 5 and the front face of the backup member 10 and locks the first passive cam 5 at the advance position. The work W is subjected to a punching by a punch 13 and punched hole 4 by descending the upper die 16 further and by advancing the second passive cam 11 with the contact of the second active cam 21 with the taper face 14 of the second passive cam 11.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a press working device that cuts the edge of a workpiece and makes a hole in the same process.

<Prior art> When cutting the edge of a workpiece and drilling a hole by press working, a passive gnome that can move forward and backward is provided on the lower mold 1, and an active cam that moves the passive cam forward is provided on the lower mold 1. A shifting cam mechanism with a fixed nomu is used, and cutting the edge of the workpiece is called offset punching, and drilling a hole is called offset punching.

<Problems to be Solved by the Invention> In the case of the above-mentioned conventional offset cam mechanism, the cutting edge for cutting the edge of the workpiece is provided with a cutting blade in the passive nozzle, and the offset hole punching for cutting the edge of the workpiece is provided with a cutting blade. This is done by providing a punch in the passive cam.

Therefore, since the offset cutting and offset hole punching are performed in separate processes, the number of man-hours and press die costs are large, and there is a problem in that at least two presses are required.

Means for Solving the Problems In order to solve the above problems, the present invention provides a fixed cutting tool member having a punch hole and a fixed cutting edge on a lower die, and a fixed cutting tool member that can move forward and backward with respect to the fixed cutting tool member. A first driven cam is provided with a movable cutting edge that is biased in the forward and backward direction by a spring and that corresponds to the fixed cutting edge, and a first driven cam that has a punch at its tip is provided on the first driven cam. A second passive cam is provided so as to be movable forward and backward with respect to the punch hole of the fixed cutting tool member and biased in the forward and backward directions by a spring, and a first active cam for moving the first passive cam forward and a second passive cam on the upper die. , and a second active cam that moves the second passive cam forward.

<Function> The present invention is characterized in that, by the downward movement of the second type, the first active cam moves the first passive cam forward, and the movable cutting blade and the fixed cutting blade cut the edge of the workpiece. , followed by the second
The second passive cam is moved forward by the active cam to punch a hole in a workpiece using a punch and punch hole.

Embodiments Hereinafter, embodiments of the present invention will be described based on FIGS. 1 to 4. In FIG. 1, 1 is a lower mold, and 16 is an upper mold.

A fixed cutting tool member 2 having a punch hole 4 and a fixed cutting blade 3 is fixed to the lower mold 1''2, and a first passive cam 5, which is movable forward and backward relative to the fixed cutting tool member 2, is moved forward and backward by a spring 6. It is biased and provided. This first passive cam 5
A movable cutting blade 7 corresponding to the fixed cutting blade 3 is fixed to the front surface of the cutting blade. Further, the rear surface is formed with a cam surface consisting of a tapered surface 8 having a downward slope toward the rear and a rear end surface 9 in the vertical direction continuous with the tapered surface 8. 10 is the rear end surface 9
This is a backup member having a vertical surface facing parallel to the lower mold 1 and protruding from the lower mold 1.

Further, a second driven cam 11 is provided on the first driven cam 5 so as to be movable forward and backward at an inclined angle, and is biased in the backward direction by a spring j2. A punch I3 corresponding to the punch hole 4 is protruded from the front surface of the second passive cam 11, and a cam surface formed by a tapered surface 14 that slopes downwardly downward is formed on the rear surface. 15 indicates a cushioning bat.

On the other hand, a fixed cam 17 is fixed to the upper die. The fixed cam J7 includes a first active cam 18 that moves the first passive cam 5 forward, and a second active cam 21 that moves the second passive cam 11 forward. The first active cam 18 is
The cam surface has a tapered surface 19 that contacts the tapered surface 8 of the first passive cam 5 and a vertical surface 20 that contacts the rear end surface 9 . Further, the second active cam 21 is connected to the second passive cam 1.
A tapered surface that opposes the tapered surface 14 of No. 1 is formed.

Next, the operation of the above configuration will be explained with reference to FIGS. 2 to 4. FIG. 1 shows the state of the upper die 16 at the top dead center.

In this state, the first passive cam 5 is located at the rearward end due to the pushing force of the spring 6, and the second passive cam 11 is also located at the rearward end due to the pushing force of the spring 12. In this state, the workpiece W is set on the fixed cutting tool member 2.

When the upper die 16 starts to descend as shown in FIG. The first passive cam 5 is moved forward by contacting the tapered surface 8 of the first passive cam 5. At the forward moving end of the first passive cam 5, the movable cutting blade 7 and the fixed cutting blade 3 cut the workpiece W.
The end edge W1 cuts. In other words, offset molding is performed.

At this time, as shown in FIG. 3, the first active cam 18 is fitted between the rear end surface 9 of the first passive cam 5 and the front surface of the backup member 10, and the first passive cam 5 is at the forward movement end position. Lock state.

Furthermore, the upper mold 16 descends toward the top dead center, and from now on, the second active cam 21 contacts the tapered surface 14 of the second passive cam 11 and moves the second passive cam 11 forward, as shown in FIG. As shown, at the bottom dead center of the upper mold 16, a hole is punched in the workpiece W using the punch I3 and the punch hole 4. That is,
This is to remove the holes.

-〇- As the upper mold I6 rises from the bottom dead center toward the top dead center, the second driven cam 11 is returned to its original position at the retreating end by the spring 12, and the second driven cam 11 is returned to its original position by the spring 12. After returning to the position, the first active cam 18 separates from between the first passive cam 5 and the backup member IO, and the first passive cam 5
is returned to the original position at the retracted end by the spring 6.

<Effects of the Invention> As described above, the present invention combines the first passive cam for cutting the workpiece edge provided on the lower mold and the second passive cam for drilling holes provided on the first passive cam into the upper mold. The first active cam and the second active cam fixed to the upper die move forward in sequence to cut the edge of the workpiece and make a hole, so one press machine performs one process. It is possible to achieve the same workpiece offset punching and offset hole punching, which has the effect of reducing press processing man-hours and press die costs, and improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of the device of the present invention, and FIGS. 2, 3, and 4 are explanatory views of the operation of the device of the present invention. ■... Lower die, 2... Fixed cutting tool member, 3... Fixed cutting blade, 4... Punch hole, 5... First passive cam, 6...
...Spring, 7...Movable cutting blade, 11...Second passive cam, 13...Punch, 16...Upper die, I7...
・Fixed cam, ■8...first active cam, 21...second
active cam.

Claims (1)

[Claims] A press working device for cutting the edge of a workpiece and drilling a hole, the fixed cutting tool member having a punch hole and a fixed cutting blade on a lower die, and the fixed cutting tool member being movable forward and backward relative to the fixed cutting tool member,
A first passive cam is provided with a movable cutting blade that is urged in the forward and backward direction by a spring and corresponds to the fixed cutting blade, and a second passive cam that has a punch at its tip is mounted on the first passive cam. a first active cam that is movable forward and backward with respect to the punch hole of the fixed cutting tool member and is biased in the forward and backward directions by a spring, and that is provided on the upper mold to move the first passive cam forward;
A press working apparatus comprising a fixed cam having a second active cam that moves the second passive cam forward.