JPH07204754A - Die device - Google Patents

Abstract

PURPOSE:To prevent the excess or short feeding of the tip part of a material to be worked by punching the tip part of the material to be worked into step- state at the inlet side of the die device corresponding to the positional difference in the feeding direction of a guide hole bored at both sides of the die and the punching shape. CONSTITUTION:The tip part of the material 9 to be worked is punch-formed with a tip punching die 10 arranged at the inlet side of the die device 1. Guide hole dies 2 and 2b are arranged so as to shift by 1/2 of the feeding pitch at both sides of the die device 1. The tip punching die 10 is formed into the step- state 11 corresponding to the positional difference of the guide hole dies 2 and 2b and the punching shapes at the lines A, B, respectively. The material 9 to be worked is fed into the die device 1 as showing in the dashed line 19 and the borings 3, 4, 6, 7, 8 of the die can be executed without causing surplus material nor half-punching.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die device provided with a device for punching and forming a tip end of a workpiece at the start of punching.

[0002]

2. Description of the Related Art When a work piece, such as an iron core piece, is punched from a metal plate into a predetermined shape by a progressive die device, a guide hole is formed in the work piece in the first station, and the work piece is cut. In the feeding to the next station, the guide hole is fed to a position corresponding to the guide hole provided on the die side of the mold device,
A guide pin provided on the punch side is inserted and positioned at each progressive feed, and punched at each station.

In the die unit, multi-row cutting, for example, two row cutting is performed in order to improve the yield of the material to be processed and the productivity. In the two-row picking method, the punching dies are arranged in a zigzag manner to increase the yield of the material to be processed, and the zigzag arrangement has an advantage that the die apparatus itself can be downsized with respect to the punching ability.

In the multi-row mold apparatus, the guide holes are not formed on the work material on the same line in the width direction, but are displaced in the feed direction. The cutting die is installed in a zigzag shape in multi-row picking, and the guide wheels corresponding to each row
This is because it is necessary.

[0005]

By the way, when punching is started by the die device and the work is sequentially performed, first,
The front end of the work piece must be fed into the mold tool and the first guide hole must be drilled. At this time, until the first guide hole is drilled in the work material, the work material is manually fed into the mold device by aiming at the installation location of the guide hole die empirically, and a rough examination is made. Has been drilled. Therefore, not only time and skill are required, but when the tip of the workpiece is not sufficiently fed, the guide hole may be pierced in a half-hanging manner, which may damage the punch, I'll climb up. On the other hand, if the amount of feed is excessive, the number of parts that are not used for punching increases, the yield decreases, and the feeding may be hindered thereafter.

According to the present invention, there is no punch damage or reduction in the yield of the work material, and the tip end of the work material can be fed into the die device in a short time even for a beginner to improve the productivity. With the goal.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a progressive die apparatus in which a guide hole formed in a workpiece is aligned with a guide hole of a die, a guide pin is inserted for positioning, and punching is performed. At the entrance side of the mold device, there is provided a tip punching device that punches the tip end of the work piece in a step shape according to the position difference in the feed direction of the guide wheels installed on both sides of the mold and the punching shape. In the provided die device, the tip punching device punches the tip of the material to be processed and sends it to the die device.

[0008]

According to the present invention, the tip of the work material is adjusted in front of the die device for punching the work material into a desired shape so that the position difference in the feed direction of the guide wheels installed on both sides of the die and the punched shape can be adjusted. A tip punching device for punching a stepped portion is installed so that the tip of the workpiece is punched when starting to pass the material. When the tip portion is punched and formed, the first guide hole can be formed without causing a half-hanging due to insufficient feeding into the mold device and excess material, and even a beginner can quickly perform it without any problem.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on one embodiment with reference to the drawings. FIG. 1 shows a die portion of a mold apparatus 1, and this embodiment can take two rows.
Reference numeral 2 is a guide hole die, which is provided on both sides of the mold, but since the installation positions are in two rows, it is not on the same line in the width direction of the work material and is half the length of the feed pitch. I'm staggering. That is, in the other row B than the row A, the guide wheel dies 2b are shifted rearward by ½ of the feed pitch. This is called station 1S.

3 is a shaft hole die installed in the row A, 4 is a skew escape hole die, and 1/2 is the feed pitch in the other row B.
Axial hole die 3b, skew escape hole die 4b
Is installed. Reference numerals 5 and 5b are guide holes in this station 2S. In addition, Station 3 described later
Guide holes 5, 5 for S, 4S, 5S, 6S respectively
b is provided.

Reference numeral 6 designates a slot die installed in the row A of the station 3S, and reference numeral 6b designates a slot die installed on the side of the other row B shifted by 1/2 the feed pitch.

Numeral 7 is a die for caulking projections installed in the row A of the station 4S, and numeral 7b is a die for caulking projections on the side of the other row B, which is installed half way behind the feed pitch.

In the station 5S, the outer shape is punched out and caulked and laminated, 8 is an outer die for the row A, and 8b is an outer die for the other row B, which is also 1 / of the feed pitch.
2 It is provided behind the door.

The die side of the die unit is constructed as described above, and the punch and the guide pin are installed on the punch side correspondingly, but the drawing is omitted.

The work material 9 is sequentially fed to each station of the die apparatus and punched, and the outer shape is punched out at the final station 5S and caulked and laminated, but the work material 9 is fed to the die apparatus and punched. When starting, it is important to increase the material yield, to prevent half-punching due to insufficient feeding, and to carry out the feeding handling of the tip of the work material promptly and reliably.

Therefore, in the present invention, a tip punching die 10 for punching the tip portion 9a of the workpiece 9 is installed on the entrance side of the mold apparatus 1. The tip punching die 10 is provided on both sides of the mold apparatus 1 so as to correspond to the positional difference between the guide hole dies 2 and 2b provided by being shifted by 1/2 of the feed pitch, and the shapes punched in the row A and the other row B, respectively. It is formed in a step shape 11. In the punching of the tip portion 9a, it is preferable from the standpoint of the plate passing property to have a mountain-like step shape in which the corners on both ends are eliminated as in this embodiment.

Further, as shown in FIG. 2, a guide hole die 20 is provided in the tip-punching die 10 so that the guide hole 13 can be formed by punching the tip portion 9a of the workpiece 9 with the tip-punching die 10. Good.

The tip cutting die 10 or the guide wheel
A punch corresponding to the rudai 20 is installed, but is not shown. The tip cutting die 10 or the guide hole die 20 is used when starting the punching of the work material 9, and is not operated during the punching of the mold device 1. 1
Reference numeral 2 denotes a tip receiving member which is provided in front of the tip cutting die 10 so as to be movable back and forth and receives the tip when the tip of the workpiece 9 is formed.

Next, the operation will be described. First, before the tip portion 9a of the work material 9 is fed into the mold device, it is punched by the tip punching die 10 and a punch (not shown). Next, the work material 9 is fed into the mold device 1 as shown by the chain line 14, and the guide holes 13, 2b are punched by the guide hole dies 2, 2b and the punch (not shown). The work material 9 after punching is as shown in FIG. 3, and the guide holes 13 and 13b are displaced by 1/2 length of the feed pitch in correspondence with the double-row machining so that no surplus material is produced and a half length is applied. It can be seen that it can be drilled without removing it.

In the tip punching die 10 as shown in FIG. 2, the guide holes 13 and 13b are formed at the same time as the punching of the tip portion 9a.
Is punched, and when it is then fed into the mold apparatus 1, the guide wheels 5 and 5b are positioned.

After that, the work material 9 is sequentially fed by a feed pitch, that is, one station length, and punched into a predetermined shape.
At this time, in each station, as described above, the guide wheels 5, which are installed on both sides with a shift of 1/2 the feed pitch,
The guide holes 13 and 13b formed in the workpiece 9 at the first station 1S are aligned with the workpiece 5b, and guide pins (not shown) provided on the punch side are inserted, positioned and punched sequentially with high accuracy. .

[0022]

As described above, according to the present invention, the tip end of the tip end of the material to be processed is punched into a step shape on the entrance side of the die device according to the positional difference in the feed direction of the guide holes on both sides of the die and the punched shape. Since a punching device is provided, the tip of the work piece punched by the device is fed into the die device without overfeeding or underfeeding, and the first guide hole is punched without excess material or half-hanging. Set up. Further, this has an effect such that the passage of the work material is smooth and the subsequent punching is stably performed.

[Brief description of drawings]

FIG. 1 is a diagram showing a die portion of a mold device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a tip end die according to another embodiment of the present invention.

FIG. 3 is a view showing a punched end of a material to be processed and a guide hole drilled in one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold device 2 Guide hole die 3 Shaft hole die 4 Skew relief hole die 5 Guide hole 6 Slot die 7 Caulking protrusion die 8 Outer shape cutting die 9 Workpiece material 10 Tip removal die 11 Step shape 12 Tip receiver 13 Guide hole

Claims (2)

[Claims] 1. A mold apparatus in which a guide hole formed in a workpiece is aligned with a guide hole of a mold, a guide pin is inserted and positioned, and punching and sequential feeding is performed. A die is provided with a tip punching device that punches the tip end of the workpiece in a step-like manner so as to correspond to the position difference in the feed direction of the guide holes punched on both sides of the die and the punching shape. Mold device. 2. The mold apparatus according to claim 1, wherein a guide hole punching device is provided side by side with the tip punching device.