JPH0435246B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a header punch exchange device that is capable of automatically exchanging the punch currently being used and a spare punch to be used thereafter.

(Prior Art) In forming a material using a header, for example, forming a cross recess in the head of a screw is performed by pressing the material with a punch having a cross-shaped protrusion at the tip. This type of punch gradually wears out during repeated use and may even break, so it must be replaced as appropriate.

(Problem to be solved by the invention) However, in the past, such punch replacement work was done manually by an operator after stopping the operation of the device, which did not improve work efficiency, and also prevented labor-saving and unmanned operation. It had become one of the bottlenecks for the transformation of Japan.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a device that can automatically replace punches of this type.

(Means for Solving the Problems) For this purpose, the present invention provides a punch case 3 provided on a ram 2 of a header with a punch 1 that is actually used.
Then, a spare punch 1a to be used next is placed behind the punch 1 on the same axis, and a plurality of spare punches 1b to 1e to be used later are arranged parallel to the spare punch 1a. In addition to providing a holding device 10 and a holding release device 15 for the punch 1 to be used, pushing out the spare punch 1a coaxially placed as described above to the working position, and pushing out the spare punch 1a of the punch 1 to be used By providing an extrusion device 7 behind a spare punch, which performs extrusion and removal at the same time, the punches 1 to 1e arranged as described above can be replaced and used in order.

(Function) In the above configuration, when a punch replacement command is issued by the separately provided production quantity counting device or punch breakage detection device during operation, the operation is first stopped, and then the holding release device 15 is activated. The holding state of the punch 1 currently being used is released. Next, extrusion device 7
is activated, the spare punch 1a is pushed out to the front working position, and the punch 1 that was being used until then is pushed by this spare punch 1a and moves into the punch case 3.
be pushed out and excluded. Also the next punch 1
b is sent behind the punch 1a, and the operation is resumed in the same state as at the beginning. Through the above-described punch replacement work, the punches 1b to 1e arranged in the punch case 3 are replaced and used one after another.

(Example) Hereinafter, examples of the present invention will be described with reference to the drawings, taking a punch for forming a cross hole as an example.

1 and 2, 2 is a ram of a header, 3 is a punch case provided in front of the ram 2, and a plurality of punches 1 are installed in the punch case 3.
~1f is stored. Among these, 1 is the punch currently in use at the working position, 1a is a spare punch placed behind and on the same axis as punch 1, and 1b to 1e are placed above and parallel to punch 1a. A spare punch to be used after the punches are lined up, 1f is a mock punch placed at the top,
The punches 1b to 1f are pressed against the lowermost punch 1a by the spring force of the spring material 4. Reference numeral 5 denotes a cross-shaped protrusion formed at the tip of each of the punches 1 to 1e. The mock punch 1f is arranged behind the last punch 1e when it is used. Note that the protrusion 5 is not formed in this simulated punch 1f. 7 is an air cylinder as a pushing device installed behind the punch 1a, and 8 is its rod. When the rod 8 protrudes, the punch 1a is pushed to the working position where the punch 1 was previously, and The punch 1 is pushed out of the punch case 5 and removed by the punch 1a.

Reference numeral 10 denotes a holding device for the punch 1 currently in use, which is disposed below the punch case 5;
1 and a cylindrical pin 12 as a holding member attached to the tip thereof. 13 is the cylindrical pin 12
This is an inclined part that guides the spring material 1 toward the punch 1 side.
A spring force of 1 presses the cylindrical pin 12 against both the body surface and the inclined portion 13 of the punch 1 to hold the punch 1. Reference numeral 15 denotes a holding/releasing device, which is comprised of a lever 17 rotatably mounted on a shaft 16 and an air cylinder 18 disposed below the lever 17. When the rod 19 of the cylinder 18 protrudes, the lever 17
The lower end 17a of the punch 1 is pushed by this and rotates counterclockwise, the cylindrical pin 12 is pushed by the upper end 17b and retreats, and the holding state of the punch 1 is released.

This device consists of the above-mentioned configuration, and then the third
The punch replacement work will be explained with reference to FIGS.

As the ram 2 reciprocates, the protrusion 5 at the tip of the punch 1 is pressed against the object to be forged, such as the head of a screw, thereby forming a cross recess. Now, when a punch replacement command is issued by a separately installed production counting device or punch breakage detection device, the operation is first stopped, and then the reciprocating ram 2 is stopped at an appropriate position. Next, the air cylinder 18 is actuated to project its rod 19, the lever 17 is rotated, the cylindrical pin 12 is moved back, and the holding state of the punch 1 is released (see FIG. 3).

Next, the air cylinder 7 is activated, and the punches 1 and 1a placed on the same axis are pushed forward by the rod 8, and the punch 1 is pushed out and removed from the punch case 3, and the punch 1a is used for the next operation. The tip of the punch 1b placed on the shaft is pushed out to a position where it does not interfere, and the punch 1b is pressed against the upper surface of the rod 8 (see FIG. 4). Next, the rod 8 is retracted, and the rod 19 is retracted by the actuation of the air cylinder 18, and the punch 1
b descends behind punch 1a, and punch 1a
is held by a cylindrical pin 12 so as not to move to the left in the figure (see FIG. 5).

Next, when a command to resume operation is given, the punch 1a is pressed against the pressure receiving wall surface 3a of the punch case 3 through the preliminary punch 1b by the first forging, and the operation is resumed after the punch 1a is in the same state as shown in Fig. 1. continue. By replacing the punches as described above, the punch case 3
Each of the punches 1 to 1e in the punches 1 to 1e will be replaced and used in order thereafter.

(Effects of the Invention) As explained above, according to the present invention, it is possible to push out the punch 1 that is currently used, push out the spare punch 1a that will be used next, and push out the spare punch 1a that will be used next, and the spare punch 1a that will be used next. The three operations of sending the punch 1b to the back of the punch 1b can be performed at the same time, and therefore the punches can be automatically exchanged while the apparatus is continuously operated.

[Brief explanation of drawings]

The figure shows an embodiment of the present invention.
The figure is a sectional view of the main part during operation, Figure 2 is a partial front view,
FIG. 3, FIG. 4, and FIG. 5 are sectional views showing operations during punch replacement. 1... Punch currently used, 1a to 1e... Spare punch, 2... Ram, 3... Punch case,
7... Cylinder as an extrusion device, 10...
Holding device, 15... Holding release device.

Claims (1)

[Claims] 1. In the punch case provided on the ram of the header, place the punch currently being used and the spare punch that will be used next, located behind the punch, on the same axis, and place the punch that will be used later in parallel with the spare punch. A plurality of spare punches are lined up, and a holding device and a holding release device are provided for the punches currently in use, and a mechanism for pushing out the spare punches placed on the same axis to the working position and pushing out the spare punches for the punches currently in use is provided. A punch exchange device for a header, characterized in that an extrusion device that simultaneously performs extrusion and removal by the punch is provided behind the spare punch, so that the punches arranged as described above can be exchanged and used in order. .