JPH06226363A - Flange forming equipment - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] When a bottomless flange and a bottomed flange are installed side by side, distortion can occur in the parting line of both flanges by simultaneously molding two types of flanges. Provide no flanging equipment. [Structure] The work piece is sandwiched between the upper surface of the lower die 10 and the pressure, and when the upper die 1 descends, the bottomed flange punch 3
When the bending blade 31 of No. 1 and the bending blade portion 41 of the bottomless flange punch 4 are positioned on the same straight line and simultaneously descend to start machining, when both flange punches further descend, both bending blade portions are perpendicular to the bottomed flange. And the bottomless flange, and the punch 3 is received by the bottomed flange lower die 12 and stops while forming the horizontal portion of the bottomed flange. When the upper mold further descends,
The punch 3 is pushed up into the working chamber 2 from below, the slide cam 5 is moved, and the punch 4 is lowered to form the bottomless flange into a flat plate shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming flanges on the peripheral edges of various members, and more particularly to a flange forming apparatus for forming only a part of the flange into a bottomed flange formed by folding back at a predetermined angle. .

[0002]

2. Description of the Related Art Generally, a flange is formed on the periphery of a vehicle body panel of a vehicle or various panels constituting various devices. Such a flange is bent at a predetermined angle with respect to the panel body portion. However, there is a flange with a bottom formed by folding back only a part of the flange in two steps at a predetermined angle with respect to the panel body. As an example, as shown in FIG. 8, a flat plate-shaped flange (hereinafter, referred to as a bottomless flange) B bent at a predetermined angle at the end of the panel A and a flat flange B bent at the predetermined end at the end of the panel A. A bottomed flange C is formed which is composed of a first flange C ₁ and a second flange C ₂ bent at a predetermined angle with respect to the first flange C ₁ (for example, the actual opening 64-64).
(See Japanese Patent No. 177532).

In order to form the normal bottomless flange B and the bottomed flange C on the panel A, as shown in FIG. 9, the panel A is placed on the lower mold D and a presser (not shown). The bottom endless flange B is formed by the punch E that is pressed by the lower die D and is lowered along the peripheral edge portion of the lower die D with a predetermined clearance, and the step portion D ₁ provided at a predetermined position of the lower die D and the punch E. A flange forming apparatus for forming the first flange C ₁ and the second flange C ₂ of the bottomed flange C with the bottomless flange B by the stepped portion E ₁ provided with a predetermined time delay is used. It was

[0004]

However, in the above-mentioned conventional flange forming apparatus, the bottomless flange B is formed and then the bottomed flange C is formed, and the bottomless flange B and the bottomed flange C are formed. Since the processing timing is different, the bottomless flange B and the bottomed flange C,
Parting line F formed as a ridge between panel A and
There was a problem of distortion.

An object of the present invention is to prevent distortion in the parting line of both flanges by molding two types of flanges substantially simultaneously when a bottomless flange and a bottomed flange are provided side by side. A flange forming device is provided.

[0006]

In order to achieve the above object, a flange forming apparatus of the present invention is a flange forming apparatus having a bottomed flange in a part thereof. Equipped with a flange punch that can be raised and lowered,
At the beginning of the descending stroke of both punches, the flange forming lines of the bottomless flange and the bottomed flange are matched and bent, and after the bottomed flange punch is received by the lower die, the bottomless flange punch is moved in the subsequent strokes. To lower it.

[0007]

[Operation] Place the work piece on the lower die, lower the bottomless flange punch and the bottomed flange punch at the same time, and match the flange forming lines of the bottomless flange and the bottomed flange at the beginning of the descending stroke. Both flanges are bent at the same time, and after the bottom flange punch is received by the bottom flange bottom die that is provided protruding to the bottom die, the bottomless flange punch is lowered in the subsequent strokes.
Since the bottomless flange and the bottomed flange are formed at the same time, the parting line is not distorted.

[0008]

Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a working chamber 2 is formed in an upper die holder 1, and a bottomed flange punch 3 and a bottomless flange punch 4 are provided in the working chamber 2.
Are slidable in the vertical direction, and a slide cam 5 is slidable in the left and right directions above both flange punches 3, 4. The bottomed flange punch 3 includes a bending blade portion 31 having a predetermined length L ₁ extending horizontally at the lower end, an outer sliding surface 32 extending vertically from both ends of the bending blade portion 31 and in contact with the working chamber 2, and a bottomless flange punch 3. Inner sliding surface in contact with the side wall (sliding surface) of 4
33 and the outer sliding surface 32 to the inner sliding surface at an angle of 45 degrees at the upper end
It is inclined so as to become lower toward 33, and is continuous with the cam guide surface 35 having the guide groove 34 and the upper end of the cam guide surface 35,
A horizontally extending stopper surface 36 is provided, and a pin guide 47, which is an elongated hole extending vertically, is provided near the central portion.

The bottomless flange punch 4 has a bending blade portion 41 of a predetermined length L ₂ extending horizontally at the lower end, an outer sliding surface 42 extending vertically from both ends of the bending blade portion 41 and in contact with the working chamber 2, and a bottom. Inner sliding surface 43 that contacts the inner sliding surface 33 of the flangeless punch 3
And from the outer sliding surface 42 to the inner sliding surface 43 at an angle of 45 degrees at the upper end.
The cam guide surface 45 has a guide groove 44 that is inclined toward the lower side, and a stopper surface 46 that is continuous with the upper end of the cam guide surface 45 and extends horizontally. A pin guide 47 composed of a hole is provided, and a spring locking body 48 is provided at a proper position on the outer sliding surface 42 so as to project. The upper end of the upper return spring 6 provided vertically in the first storage chamber 21 provided on the wall surface of the working chamber 2 in contact with the outer sliding surface 42 is engaged with the spring locking body 48 of the bottomless flange punch 4. The lower end of the upper return spring 6 is stopped by the lower wall of the first storage chamber 21 and urges the bottomless flange punch 4 upward. The pin guides 37 and 47 of the bottomed flange punch 3 and the bottomless flange punch 4 respectively have guide pins 8 and 9 projecting from the wall surface of the working chamber 2.
Is slidably penetrated.

The slide cam 5 is a bottomed flange punch 3
Of the first cam surface 51 having a guide body 52 slidably fitted in the guide groove 34 and contacting the cam guide surface 35 of the bottom guide flange 45, and the cam guide surface 45 of the bottomless flange punch 4. A second cam surface 53 having a 45-degree inclination to contact and having a guide body 54 slidably fitted in the guide groove 44, and an upper end guide surface 55 slidably contacting the inner wall of the upper wall of the working chamber 2. And the first cam surface
51 and an upper end guide surface 55 are provided with a vertical wall surface 56 whose both ends are continuous, and a spring locking body 57 is projectingly provided at an appropriate position on the upper end guide surface 55. A second storage chamber 22 is formed on the upper wall of the working chamber 2 with which the upper end guide surface 55 comes into contact, and the lateral return spring 7 is laterally installed in the second storage chamber 22 so that one end is the second storage chamber.
It is locked to the inner wall of 22 and the other end is locked to the spring locking body 57 of the slide cam 5, and biases the slide cam 5 toward the bottom flange punch 3 side (left in the figure). ing.

The lower die 10 has a bending blade portion 11 that forms a bottomless flange and a vertical surface of the bottomed flange, and a lower portion than the bending blade portion 11 by a predetermined length (processing length of the vertical surface of the bottomed flange). It is equipped with a bottom flanged lower mold 12 protruding from the position.
Workpiece W is sandwiched between the upper surface of 10 and the upper pressure 13.

The operation will be described. When the workpiece W is sandwiched between the upper surface of the lower die 10 and the pressure 13 and the upper die holder 1 is lowered, the bending blade portion 31 of the bottomed flange punch 3 and the bottomless flange are formed. The bending blade portion 41 of the punch 4 is positioned on the same straight line and descends simultaneously, and both bending blade portions 31 and 41 simultaneously start processing the workpiece W (see FIGS. 1 and 3), and the bottomed flange punch 3 and the bottomless flange punch 4 are further lowered, the bending blade portions 31 and 41 become the bottomed flange W ₁ of the workpiece W.
Forming a vertical portion W ₁₁ and a bottomless flange W _2, and while the bottomed flange punch 3 forms a horizontal portion W ₁₂ of the bottomed flange W ₁ , the bottomed flange punch 3 receives the bottomed flange lower die 13 and stops. (See FIGS. 4 and 5).

When the upper die holder 1 is further lowered from the position shown in FIGS. 4 and 5, the bottom flange punch 3 is received by the bottom flange lower die 13, so that the bottom flange punch 3 operates. When pushed up into the chamber 2 from below, the cam guide surface 35 of the bottomed flange punch 3 presses the first cam surface 51 of the slide cam 5 to move the slide cam 5 in the bottomless flange punch 4 direction (rightward in the figure). The second cam surface 53 of the slide cam 5 presses the cam guide surface 45 of the bottomless flange punch 4 to lower only the bottomless flange punch 4,
The bottomless flange W ₂ is formed into a flat plate shape and lowered to a push-cut position where the stopper surface 36 of the bottomed flange punch 3 comes into contact with the upper wall of the working chamber 2 and stops (see FIGS. 6 and 7).
At this time, the molding pressure on the side of the bottomed flange punch 3 is larger than that on the side of the bottomless flange punch 4, but it is compensated by the urging force of the two return springs 6 and 7.

The upper die holder 1 is raised from the above-mentioned push-cut position, and the stopper surface 36 of the bottomed flange punch 3 is moved to the working chamber 2
When separated from the upper wall, the bottomless flange punch 4 is lifted by the restoring force of the return springs 6 and 7, and the slide cam 5 is moved in the bottom flange punch 3 direction (left in the figure) to move the bottom flange punch. 3 is lowered to position the bending blade portion 31 of the bottomed flange punch 3 and the bending blade portion 41 of the bottomless flange punch 4 on the same straight line, and the whole is raised to return to the position of FIG.

[0015]

Since the present invention is constructed as described above, it has the following effects. Place the work piece on the lower die, lower the bottomless flange punch and the bottomed flange punch at the same time, and at the beginning of the descending stroke, match the flange forming lines of the bottomless flange and the bottomed flange to fit both flanges. At the same time, the bottomed flange punch is bent in the subsequent strokes after it is bent and formed, and the bottomed flange punch is received by the bottomed flange lower die that is provided protruding to the lower die. Since the forming process of the bottomed flange is performed at the same time, the parting line formed at the bent portion is not distorted.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a flange forming apparatus according to the present invention.

FIG. 2 is a view on arrow II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a partial cross-sectional view showing an operating state of the flange forming apparatus according to the present invention.

5 is a sectional view taken along line VV in FIG.

FIG. 6 is a partial cross-sectional view showing an operating state of the flange forming apparatus according to the present invention at a push-cut position.

7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a perspective view showing an example of a molded product partially having a bottomed flange.

FIG. 9 is a perspective view of a conventional flange forming apparatus.

[Explanation of symbols]

1 upper die holder, 2 working chamber, 3 bottom flange punch, 4 bottomless flange punch, 5 slide cam, 6 upper return spring 7 lateral return spring, 8, 9 guide pin,
10 Lower mold 11 Bending blade, 12 Bottom flange lower mold, 13 Pressure W Workpiece

Claims (1)

[Claims] 1. A flange forming apparatus having a bottomed flange as a part, comprising a bottomless flange punch and a bottomed flange punch, and forming flanges of the bottomless flange and the bottomed flange in the downward stroke of both punches. A flange forming apparatus characterized in that the flange punches with a bottom are received by a lower die, and then the bottomless flange punch is lowered in the subsequent strokes.