JPS5840971Y2 - Bending mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold for folding a folding plate having a large number of continuous folding portions in opposing folding directions.

Conventionally, in order to bend this type of folding plate, a lower mold with a V-shaped groove and an upper mold with a V-shaped protrusion are used to bend each bent part and repeatedly reverse the material for single-shot processing. , followed by repeated butt bending.

Because of this, there are problems such as variations in product precision and low production volume (poor production efficiency).

The present invention was made in view of the above circumstances, and its purpose is to provide a bending mold that can bend a folding plate of a predetermined shape in one step.

Embodiments of the present invention will be described below with reference to the drawings.

A die holder 2 is provided on the bed 1 of the press machine, and a punch holder 4 is provided on the slide 3 facing each other.
The punch holder 4 is moved up and down along the guide post portion 30.

A pair of material positioning stands 5, 5 are provided on both sides of the die holder 2.
are erected facing each other, and a pair of fixed dies (lower dies) 6, 6 are erected at inner positions thereof;
A movable die (lower die) 7 is fitted between the movable die (lower die) 7 so as to be vertically movable, and die cushion pins 8, 8 are located on the lower surface of the movable lower die 7.

Each of the fixed lower molds 6, 6 includes an outer slope 61 and a smooth surface 6□ which are inclined outward and descended, and an inner slope 63 which is inclined and descended inward.

The movable lower mold 7 has a pair of smooth parts 71, 7, a pair of outwardly inclined outer slopes 7□, 72, and a pair of smooth parts 7.
3 r 73, it has a substantially wavy shape having a pair of inner slopes 74, 74 which are inclined inward and downward, and a concave portion 75 in the center.

The recessed portion 7. A movable piece 9 is vertically movably fitted into the movable member 9, and its upper surface 9a is on the same horizontal plane as the smooth portions 7□, 7□, and the movable rod 11 of the knockout mechanism 10 is fixed with a screw.

The movable rod 11 of the knockout mechanism 10 has its lower end large diameter portion 11a fitted into the vertical hole 12 so as to be able to move up and down, and is urged upward by a spring 14 until it abuts against the stopper 13, and when it abuts against the stopper 13, it is movable. The piece 9 is the pair of smooth parts 73
．． It is at the same height position as 73.

The punch holder 4 has a pair of fixed punches (upper die) 15.
．． 15 and a movable punch (upper mold) 16, each fixed upper mold 15 has an inclined part 151, a smooth part 152, and an inclined part 15.
3. The movable upper mold 16 has a wavy shape having a smooth part 154 and an inclined part 155, and the movable upper mold 16 has a pair of smooth parts 16.
．． , 16□, an inclined portion 162° 162, and a smooth portion 163.

The movable upper die 16 is movable up and down, and the slide cushion pin 17 is located therein.

Next, details of each member will be explained along with their operations.

■ Slide 3 is at top dead center (Figure 3).

The movable lower mold 7 is pushed up by the die cushion pin 8 to an upper position where its upward stepped portion 7a abuts the downward stepped portion 6a of the fixed lower mold 6, and the movable piece 9 is moved by the spring 14 so that its large diameter portion 11a is pushed up against the stopper 1. is pushed upward until it touches the

In addition, the movable soil feather 16 is connected to the upper step portion 15a of the fixed upper mold 15 by the slide cushion pin 17.
is pushed downward until it makes contact with the

In FIG. 3, H is the groove depth of the product, and A is a plate-shaped material placed and set across a pair of material positioning tables 5, 5.

■ As shown in Fig. 4, the slide 3 is stroked downward from the top dead center, and the movable upper mold 16 and the movable lower mold 7 bend and form the center part of the material A into a wave shape with a smooth part A, 2 and 2 openings. Process.

(Slide stroke>2H) At this time, the slide cushion force and die cushion force are set to be larger than the molding force, so the movable upper die 16 and the movable lower die 7 do not cushion.

At this time, the material A is held between the movable piece 9 and the central smooth part 163 of the movable upper mold 16 and moves downward against the spring 14, so the central part is bent into a waveform while maintaining the positioning of the material A. Since it is processed, it is processed with high precision and the bent corners are formed correctly.

■ When the slide 3 is further stroked downward by H as shown in FIG. 5, the inwardly inclined portion 156 of the fixed upper die 15.15.
15. and smooth portion 154.15. Then, the portions of the movable lower mold 7 that are continuous with the central bent portion are bent into a substantially 100-character shape by the outwardly inclined portions 72, 72 and the smooth portions 7□, 7□.

At this time, the slide cushion force is set to be weaker than the molding force, and the die cushion force is set to be stronger than the slide cushion force + molding force, so the movable upper mold 16 moves upward while pushing the slide cushion pin 17 upward. , the movable lower mold 7 does not move.

In addition, since the material A is formed while being held between the movable upper mold 16 and the movable lower mold 7, both sides of the center part can be processed while maintaining the positioning of the material A, and the bent corners can be processed with high precision. part is formed correctly.

■ As shown in Fig. 6, when the slide 3 is further stroked downward by 4H or more, the forming force becomes stronger than the die cushion force, and the movable lower mold 7 is moved downward while pushing the die cushion pin 8 downward. Fix both sides of the lower mold 6
, 6's inclined portions 6□, 6□, smooth portion 6□ and fixed upper die 15.
The material A is formed by the inclined parts 15□, 153 and the smooth part 15□ of 15 to complete the forming into a predetermined shape folding plate B (see Fig. 7).At this time, the material A is formed by the fixed upper mold 15. Since it is formed while being held between the two, the bending corners can be accurately processed as described above.

The present invention is as described above, and a folded plate continuously bent into a substantially waveform can be formed by moving the upper mold and the lower mold relative to each other by a -stroke.

Therefore, a folding plate of a predetermined shape can be folded in one step.

Further, the movable lower mold 7 and the movable upper mold 16 are moved and held in the upper and lower positions by the die cushion pin 8 and the slide cushion pin 17, and the movable piece 9 provided on the movable lower mold 7
is moved and held in the upper position by the movable rod 11 of the knockout mechanism 10, so when bending the material, the movable piece 9 and the movable upper mold 16 suppress and hold the middle of the material to prevent the material from shifting. After that, the material can be bent into a substantially corrugated shape, so the material can be folded into a corrugated shape with high accuracy, and the die cushion mechanism and slide knockout mechanism installed on a normal press machine can be used, so there is no need to install a special mechanism. Therefore, just by attaching it to a normal press machine, you can bend the material into a wave shape.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of the present invention, and Figure 2 is its
3 to 6 are explanatory views of the operation, FIG. 7 is a front view of a folded plate that has been bent, and FIG. 8 is a schematic plan view of FIG. 1. 6.6 is a fixed lower mold, 7 is a movable lower mold, 15.15 is a fixed upper mold, 16 is a movable upper mold, A is a material, and B is a folding plate.

Claims (1)

[Scope of utility model registration request] A pair of fixed lower molds 6 with uneven upper surfaces are mounted on the die holder 2.
. A die cushion is provided in a lower position where the movable lower mold 7 has a substantially waveform shape and at an upper position where the upper surface of the movable lower mold 7 protrudes above the upper surface of the fixed lower mold 6 so as to be vertically movable, and in which the movable lower mold 7 passes through the die holder 2. A pair of fixed upper molds 15 and 15 having uneven lower surfaces are fixed to the punch holder 4 facing the die holder 2, and the pair of fixed upper molds 15 and 15 are moved and held in an upper position by pins 8 to form a lower mold. A movable upper mold 16 with an uneven lower surface is placed between the molds 15 and 15.
The lower surface of the movable upper mold 16 and the lower surface of the fixed upper mold 15 are vertically moved to an upper position where the lower surface of the fixed upper mold 15 has a continuous substantially wavy shape, and to a lower position where the lower surface of the movable upper mold 16 protrudes below the lower surface of the fixed upper mold 15. The movable upper mold 16 is moved and held in a downward position by a slide cushion pin 17 passing through the punch holder 4 to constitute an upper mold, and the movable lower mold 7
A movable piece 9 is provided at an intermediate portion in the left-right direction of the movable lower die 7 so as to be movable vertically between an upper position protruding upward from the upper surface of the movable lower mold 7 and a lower position at the same height as the upper surface. A bending mold characterized in that the mold is connected to a movable rod 11 and moved and held at the above-mentioned upper position.