JP3187641B2 - Mold equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art When a workpiece, for example, an iron core piece or the like is punched from a metal plate into a predetermined shape by a progressive die apparatus, a guide hole is formed in the workpiece at a first station, and the workpiece is removed. In feeding to the next station, the guide hole is sent to a position corresponding to a guide hole provided on the die side of the mold apparatus,
A guide pin provided on the punch side is inserted and positioned at every forward feeding, and punched at each station.

[0003] In a mold apparatus, multi-rowing, for example, two-rowing is performed in order to improve the yield and the productivity of a workpiece. In the two-row arrangement, the yield of the workpiece is increased by arranging the punching dies in a staggered manner, and the staggered arranging has the advantage that the die apparatus itself can be downsized with respect to the punching ability.

In a multi-row mold apparatus, the guide holes are not formed on the same line in the width direction with respect to the workpiece, but are shifted in the feed direction. This is because in multi-row picking, the dies are set in a zigzag pattern, and guide holes corresponding to each row
Is necessary.

[0005]

By the way, when punching is started by the die apparatus and the work is sequentially performed, first,
The leading end of the workpiece must be fed into the mold apparatus and the first guide hole must be drilled. At this time, until the first guide hole is formed in the workpiece, the workpiece is manually empirically sent into the mold apparatus with the target of the guide hole die being set, and a rough study is made. Has been drilled. Therefore, not only does it require time and skill, but when the leading end of the workpiece is insufficiently fed, a situation where the guide hole is formed in a half-hung shape occurs and the punch is damaged, We go up scum. Conversely, if the feeding is excessive, the portion that is not used for punching increases, resulting in a decrease in yield and a hindrance to subsequent feeding.

According to the present invention, a die apparatus capable of improving productivity without causing punch damage and a reduction in the yield of a workpiece, and enabling a beginner to feed the tip of the workpiece into the die apparatus in a short time. With the goal.

[0007]

SUMMARY OF THE INVENTION The gist 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, positioned, and punched. At the entry side of the die apparatus, there is provided a tip punching device for punching 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 installed on both sides of the die and the punching shape. In the mold apparatus provided, the tip end of the workpiece is punched and formed by the tip punching device and fed into the mold device.

[0008]

According to the present invention, before the die apparatus for punching a workpiece into a desired shape, the leading end of the workpiece is adjusted so as to correspond to the positional difference in the feed direction of the guide holes installed on both sides of the die and the punching shape. A tip punching device for punching the portion in a step-like manner is installed, and when starting to pass the workpiece, the tip portion is punched and formed. When the tip portion is stamped and formed, the first guide hole is formed without half-clogging due to excess material or insufficient feeding into the mold apparatus, and even a novice can quickly do so.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on an embodiment with reference to the drawings. FIG. 1 shows a die portion of a mold apparatus 1, which can be arranged in two rows in this embodiment.
Reference numeral 2 denotes a guide hole die which is provided on both sides of the mold. Since the installation positions are two rows, the guide holes are not on the same line in the width direction of the workpiece and have a length of 1/2 of the feed pitch. I'm staggered. That is, the guide hole die 2b in the other row B is shifted backward by half the feed pitch from the row A. This is called a station 1S.

Reference numeral 3 denotes a shaft hole die installed in a row A, 4 denotes a skewing relief die, and another row B denotes a half of the feed pitch.
Shaft hole die 3b shifted to the rear, skew relief hole die 4b
Is installed. Reference numerals 5 and 5b denote guide holes in the station 2S. It should be noted that the following station 3
S, 4S, 5S, 6S also have guide holes 5, 5 respectively.
b is provided.

Reference numeral 6 denotes a slot die installed in the row A of the station 3S, and 6b denotes a slot die installed in the other row B side by being shifted by half the feed pitch to the rear.

Reference numeral 7 denotes a caulking projection die installed in the row A of the station 4S, and reference numeral 7b denotes a caulking projection die on the other row B side, which is installed at a half of the feed pitch.

The station 5S is for removing the outer shape and caulking and laminating. Reference numeral 8 denotes an outer shape removing die in row A, and 8b denotes an outer shape removing die on the other row B side.
It is provided to be shifted rearward by two.

The die side of the mold apparatus is configured as described above, and a punch and guide pins are provided on the punch side correspondingly, but the drawing is omitted.

The workpiece 9 is sequentially fed to each station of the mold apparatus, punched out, punched out at the final station 5S, and laminated by caulking. The workpiece 9 is fed into the mold apparatus and punched. It is important to increase the material yield, prevent half-cutting due to insufficiency of feeding, and perform quick and reliable feeding handling of the front end of the workpiece when starting the process.

Therefore, in the present invention, on the entry side of the mold apparatus 1, a tip cutting die 10 for punching and forming the tip 9a of the workpiece 9 is provided. The tip punching die 10 conforms to the difference in position between the guide hole dies 2 and 2b provided on both sides of the mold apparatus 1 and shifted by の of the feed pitch, and the shape punched in each of the row A and the other row B. It is formed in a step shape 11. In the punching of the front end portion 9a, it is preferable to form a mountain-shaped step having no corners at both ends, as in this embodiment, from the viewpoint of the passing property.

In addition, as shown in FIG. 2, a guide hole die 20 is provided on the tip cutting die 10 so that the tip hole 9a of the workpiece 9 can be punched and the guide hole 13 can be formed with the tip cutting die 10. Is also good.

The above-mentioned tip punching die 10 or guide hoe
A punch corresponding to the rudai 20 is installed, but is not shown. The leading end die 10 or the guide hole die 20 is used when starting the punching of the workpiece 9 and is not operated during the punching of the mold apparatus 1. In addition, 1
Reference numeral 2 denotes a front end receiving member, which is provided in front of the front end cutting die 10 so as to be able to advance and retreat, and receives the front end when the front end of the workpiece 9 is formed.

Next, the operation will be described. First, before the front end portion 9a of the workpiece 9 is fed into the mold apparatus, the front end portion 9a is punched and formed with a front end punching die 10 and a punch (not shown). Next, the workpiece 9 is fed into the mold apparatus 1 as shown by a dashed line 14, and the guide holes 13 and 13b are punched by the guide hole dies 2 and 2b and a punch (not shown). The workpiece 9 after the punching is as shown in FIG. 3, and the guide holes 13 and 13b are shifted by a half of the feed pitch corresponding to the two rows, so that no extra material is generated and half the hooking is performed. It can be seen that it is pierced without being pulled out.

Also, in the tip punching die 10 as shown in FIG. 2, the guide holes 13, 13b
Are drilled and then fed into the mold apparatus 1 to position the guide holes 5, 5b.

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

[0022]

According to the present invention, on the entry side of the mold apparatus, the tip of the workpiece is punched and formed stepwise so as to conform to the difference in the feed direction of the guide holes on both sides of the mold and the punching shape. Since the punching device is provided, the front end of the work material punched by the device is fed into the mold device without overfeeding or underfeeding, and the first guide hole is punched without generating any excess material or half hooking. Is established. In addition, there is an effect that the passing of the workpiece is smooth and the subsequent punching is performed stably.

[Brief description of the drawings]

FIG. 1 is a view showing a die portion of a mold apparatus according to one embodiment of the present invention.

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

FIG. 3 is a diagram showing a punched end of a workpiece and a guide hole perforated in one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Die apparatus 2 Guide hole die 3 Shaft hole die 4 Skew relief hole die 5 Guide hole 6 Slot die 7 Die for caulking protrusion 8 Outer shape cutting die 9 Workpiece 10 Die for cutting off tip 11 Step shape 12 Tip holder 13 Guide hole

Continuation of the front page (56) References JP-A-62-197225 (JP, A) JP-A-58-9727 (JP, A) JP-A-54-7475 (JP, A) JP-A-60-8826 (JP, A) , U) Japanese Utility Model Showa 56-126933 (JP, U) Japanese Utility Model Showa 58-160635 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21D 28/00-28/36 B21D 43/05

Claims (2)

(57) [Claims] 1. A mold apparatus for aligning a guide hole drilled in a workpiece with a guide hole of a mold, inserting and positioning a guide pin, and sequentially feeding the punching apparatus. A die is provided with a tip punching device for punching the tip end of a workpiece in a stepwise manner so as to correspond to the difference in position in the feed direction of guide holes formed on both sides of the die and the punching shape. Mold device. 2. The die apparatus according to claim 1, wherein a guide hole punching device is provided in addition to the tip punching device.