JPS5997726A - Trimming piercing die - Google Patents

Abstract

PURPOSE:To remove obstacles in attaching a piercing punch by connecting a sliding plate in a holder and a pad by a member which penetrates an upper holder and further interposing elastic bodies between the sliding plate in the holder and a fixed plate. CONSTITUTION:A desired die is composed by connecting a movable plate 24 in a holder 21 and a pad 22 by connecting members 23 which penetrate the upper holder 21 and further interposing elastic bodies 25 between the plate 24 and a fixed plate 26. Next, a ram 2 is lowered to bring the pad 22 into contact with a work piece W placed on a punch 8, and sectional dies 6 trim the work piece W in corporation with the punch 8 while pressing the piece W by an elastic force of the compressed elastic bodies 25, and piercing punches 9 perform punching in corporation with button dies 11. Thus, even in an upper die provided with a large number of piercing punches, a required number of elastic bodies for energizing a pad 22 can be arranged regardless of the positions and the number of punches.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an upper die with a large number of piercing punches mounted thereon, regardless of the mounting position and number of piercing punches. Regarding a trim piercing type that can be provided with.

An example of a conventional trim piercing type is the one shown in Figures 1-2. 1 is an upper holder fixed to the ram 2, and 3FJ pad is slidable in the vertical direction by a pad retainer 4 fixed to the upper holder, and is connected to the upper holder by engaging with the head 4a of the pad retainer 4. It is maintained so that it will not be downgraded from 1. 5 this pad 3
and the upper holder 1. 6 is a sectional die consisting of a plurality of bows attached to the upper holder 1 along the circumference of the pad 3. .

The workpiece W is trimmed in cooperation with the cutting edge 8a of the punch 8 fixed to the bolster 7.

9. Use a piercing punch to open the retainer 10 and remove the upper holder 1.
The button die 11 provided on the punch 8 cooperates with the button die 11 to punch a hole in the workpiece W.

In addition, the pad retainer 4, elastic body 5, and piercing punch 9 are arranged as shown in FIG.
Normally, several pieces are provided in each case, so that drilling can be performed at the same time as trimming.

Now, when the upper mold M consisting of the upper holder 1, pad 3, pad retainer 4, elastic body 5, sectional die 6, piercing punch 9, etc. is in the mold opening position, a workpiece material is placed on the punch 8.

Then, when the two rams are lowered, the pad 3, which was hanging from the head 4a of the pad retainer 4, comes into contact with the workpiece 4, and due to the elasticity of the elastic body 5, which is compressed as the upper holder 1 descends. Gradually work harder W ff
:Press with punch 8 so that it does not shift.

Next, the sectional die 6 descends to trim the workpiece W in cooperation with the punch 1, and the piercing punch 9 forms a hole in the workpiece W in cooperation with the button die 11. Scrap from the drilling falls onto a chute 12 and is carried out of the mold.

However, with such a conventional trim piercing type, when a large number of holes need to be drilled in the workpiece, the upper holder and pad must be equipped with as many piercing punches as the number of holes and the required number of pad retainers. Therefore, there is a problem in that there may not be enough room to provide the required number of elastic bodies.

The present invention has been made in view of these conventional problems, and includes connecting a pad and a movable plate that can slide inside the upper holder by a connecting member passing through the upper holder, and further connecting the movable plate with the movable plate. The purpose of this invention is to solve all of the above-mentioned problems by creating a trim pierce type, which is characterized by having an elastic body connected to the fixing plate fixed to the upper holder.

The present invention will be explained below based on the drawings.

FIG. 3.4.5 is a diagram showing an embodiment of the present invention. Note that parts corresponding to the conventional example are given the same reference numerals and redundant explanation will be omitted.

First, to explain the structure, 21 is an upper holder fixed to the ram 2, 2: an l pad, which is integrated with a movable plate 24 that can slide the upper holder 21 up and down by a plurality of connecting members 23 passing through the upper holder 21. are connected.

Reference numeral 25 denotes a plurality of elastic bodies interposed between the movable plate and a constant viscosity plate 26 fixed to the upper holder 21, and the lower surface of the movable plate 24 touches the upper holder 21 when the mold is opened. It is in contact with a provided contact surface 21a.

A sectional die 6 is attached to the upper holder 21 in the same manner as in the conventional example.

The upper mold IN is composed of the above-mentioned parts except for the two rams. The lower mold corresponding to this upper mold has the same structure as the conventional example except for the number of button dies 11, which are two.

Next, the action will be explained.

When opening the mold as shown in Fig. 3, the workpiece material W=i
Place it on punch 8. And when I drop 2 rams,
The pad 22 that is hanging down first comes into contact with the workpiece W, and the elastic body 2 is compressed as the upper holder 21 descends.
The workpiece W is gradually pressed against the punch 8 by the elasticity of the punch 5.

Next, the sectional die 6 descends and works with the punch 8 to trim one workpiece W, as shown in FIG. 5, and the piercing punch 9 works with the button die 11 to punch a hole in the workpiece W. I do.

When ram 2 passes the bottom dead center and machining is completed, the upper mold NU
The pad 22 moves away from the lower punch and begins to rise, but the pad 22 remains in the workpiece Vi until the compressed elastic body 25 returns to its free length.
Although it is pressed on punch 8.

Thereafter, the upper holter '21 moves upward away from the workpiece W and returns to the initial position shown in FIG. 3.

Thereupon, the workpiece W is taken out of the mold, another workpiece material is supplied, and the above machining operation is repeated.

Note that the bottom view of the pad 22 in FIG. 3 (1v-IV
Ml-III in FIG. 4 and FIG. 4, which are arrow-view parent views.
As shown in FIG. 3, which is a sectional view, the elastic body 25, the piercing punch 9, and the connecting member 23 are made by installing the required number of elastic members at the required positions between the upper and lower walls using the movable plate 24.
]lI can be made.

As described above, according to the present invention, the structure is provided by a connecting member that traces the upper holder.

A trim characterized in that the pad and a movable plate capable of sliding inside the upper holder are connected, and an elastic body is interposed between the movable plate and a fixed plate fixed to the upper holder. Because it is a piercing type, even in the upper mold with many piercing punches attached, Parado 5! : The effect of being able to provide the required number of elastic bodies for buffering and biasing can be obtained.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the conventional example, and I-1 in Figure 2.
Figure 2 is a bottom view of a conventional pad, and Figure 3 is a sectional view of an example of the present invention, and Figure 4 is a diagram that also serves as a diagram. 4 is a view from the +v-i and v arrows in FIG. 3, that is, a bottom view of the pad in the example, and FIG. 5 is a sectional view of the example when the mold is closed. 21... ...... Upper holder 22 ...... Pad 23 ...... Connection member 24 ...... Movable plate 25 ...... ...Elastic body 26...Fixed plate

Claims (1)

[Claims] - The pad is connected to a movable plate that can slide inside the upper holder by a connecting member that traces the upper holder, and an elastic body is further inserted between the movable plate and the fixed plate fixed to the upper holder. Trim pierced earrings that are characterized by intercalated earrings.