JPS59193723A - Press device for full circumferential flanging - Google Patents

Abstract

PURPOSE:To enable full circumferential flanging on one stage by disposing organically an offset bending blade which performs flanging from a negative angle direction relative with a pressing direction and an upward bending blade which performs flanging from the pressing direction. CONSTITUTION:A work W is supplied by a guide chute 21 onto the punch 3 of a bottom die 1 and is positioned by a gauge 10, then a ram 14 is lowered to press the pad 20 of a top die 16 to the work W. The work is flanged by an upward bending blade 17 provided on three sides of the die 16. The driven cam 6 on the cam base 4 of the die 1 is advanced at the same time by a stationary cam 18 toward the punch 3 and the work is flanged from the negative angle direction relative with the pressing direction by an offset bending blade 7 with a slight time delay from the above-mentioned flanging. The work W is thereafter drawn out by the ascending of a lifter 11 and the retreating of an arm 8. The full circumferential flanging of the work is thus accomplished in one stage by using one press device.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a press device for forming seven runs around the entire circumference of a workpiece, more specifically, a press device for forming seven runs around the entire circumference of a workpiece, and more specifically, a press device for forming seven runs around the entire circumference of a workpiece, and more specifically, a press device for forming seven runs around the entire circumference of a workpiece, and more specifically, a press device for forming seven runs around the entire circumference of a workpiece, and more specifically, a press device for forming seven runs around the entire periphery of a workpiece, and more specifically, a press device for forming seven runs around the entire circumference of a workpiece, and more specifically, a press device for forming seven runs around the entire circumference of a workpiece. This invention relates to a press device for seven lungings all around the circumference, which can simultaneously perform seven lungings.

(Prior art) For example, when attempting to flush the entire circumference of a workpiece, such as an automobile hood panel, which has both seven flange portions that are at a positive angle and seven flange portions that are at a negative angle with respect to the pressing direction,
In general, a so-called 7-lunge surplus occurs at the boundary between positive and negative angle flashing, making it impossible to ensure quality.
Undesirable situations occur, such as the workpiece being unable to be removed from the press die after completing seven lancings around the entire circumference. I had to do it separately from the 7 lunges. Naturally, this is a major cause of increasing equipment costs, decreasing productivity, increasing maintenance costs, etc., and pushing up product costs, and efficient improvements have been desired.

(Purpose of the Invention) The present invention solves the problem V of the above-mentioned conventional technique 91++, and the flanging of a workpiece having 7 lunges which are cut in the press direction and has positive and negative angles is made by one press machine. The object of the present invention is to obtain a full-circumference 7-ring glazing device that can be implemented in a process and contribute to lowering the product cost by 1.

(Structure of the Invention) Z-C1 This purpose is to provide a passive cam on the lower die main body at a position that advances and retreats in the direction of the punch, and the passive cam VC is connected to the curved blade and the side 7'.
Attach the workpiece drawer arm that runs roughly from L, move it forward with a slight delay from the descent of the Kamiichikawa blade attached to the passive cam kita type main body, and move the above-mentioned side-curved blade and upper-curved blade. This is accomplished by a press device in which the end portions of the punch and the punch overlap each other, and the workpiece can be pulled out using the arm and the flange lifter provided on the side of the punch.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

FIG. 1 shows the structure of the main parts of the press equipment for full circumference flanging according to the present invention. In the figure, 1 forms a lower part 4a installed on a bolster 2, and a passive cam 6 guided by a guide bar 5 is slidably mounted thereon.

The passive cam 6 has an inclined surface 6a at its rear end, and is normally biased rearward (to the left in the figure) by a spring (not shown). In addition, at the front end of the passive cam 6, there is a bent blade 7 that performs seven lungings in a negative angle direction with respect to the pressing direction, which will be described later, and an arm that is located in front of the bent blade 7 and that pulls out the workpiece after forming. 8 is installed.

In addition, the punch 3 is provided with a workpiece positioning gauge 10 that moves up and down by a cylinder 9 and a seven-range lifter 11 for discharging the workpiece after forming, on the side of the punch 3 excluding the part where the passive cam B is installed. IfJ lifts the workpiece by moving up and down with the cylinder 12 in the upper part! , 17 and 16 are provided.

On the other hand, the upper mold body 16 fixed to the ram 14 via the upper mold stand 15 has a U-shaped upper curved blade 17 that engages with three sides of the punch 6 to perform flanging in the pressing direction. At the same time, a VC fixed cam 18 is attached to the side thereof at a position facing the cam base 4. The fixed cam 18 has a tip i17+; an inclination direction 18a that follows the inclination direction 6a of the rear end of the VC passive cam 6;
Following the descent of the ram 14, the sliding plate 19 is brought into sliding contact with the inclined direction 6a of the passive cam 6, and the passive cam 6 is advanced toward the punch 6 side.

'& O, 2 (a pad built into the IN-Jf type main body 16, which plays the role of suppressing the workpiece described later on the punch 3, and 21 is a front guide shoe), 22 is a rear guide chute, respectively. It plays the role of supplying the workpiece into the mold and discharging the inside of the mold.

(Due to the configuration, the front guide is now: z -)
211c L, the work W supplied into the mold is punched by the punch 6 by the gauge 10 and the gauge (not shown).
positioned above. Next, when the ram 14 descends, the rose 20 presses the workpiece W against the punch 61, and then the upper curved blade 17 engages with the punch 3 to begin seven lungings from the pressing direction. This means that at the same time, the fixed cam 18 engages with the driven cam A to advance the driven cam 6, and with a slight time delay from zero flanging in the pressing direction, a negative angular force is applied to the pressing direction by the biased blade 7. 7 lunging from the opposite side begins.

After completing the 7 lunging, the ram 14 rises, and the 7 lance lifters 11 disposed on three sides of the punch 2 rise, and the 7 lap portion of the completed workpiece W is ejected to the punch 6. Subsequently, the workpiece W is pulled out from the punch 5 by the arm 8 as the passive cam O retreats. The drawn-out workpiece W is lifted by the lifter 15VC and discharged from the mold via the rear guide chute 22 by a mounting device (not shown), thereby completing one process of seven-round lunging.

FIG. 2 schematically shows the state of the workpiece during the series of machining steps described above. In the figure, Wlif is the workpiece in the bottom dead center state, vV2 is the workpiece being ejected by the flange lifter 11, and w3 is the workpiece in the bottom dead center state. Arm 8vC, therefore punch 6
Each represents the work drawn from. However,
The angle α between the workpiece Wl at the bottom dead center and the discharged workpiece vv2 is within the range of elastic recovery, and L/
Therefore, the desired shape of the workpiece is ensured.

In this way, the curved blade 7 and the upper curved blade 17 have a standing protrusion 7a and a front protrusion 5-5 at the end of the blade, as shown in an enlarged view in FIG.
1% 17a are formed facing each other. As a result, when the upper curved blade 17V descends from the north of the punch 5 as shown by the arrow A, and the biased blade 7 approaches from the side as shown by the arrow B, the inside of the rising protrusion 7a of the biased blade 7 pj7
'a is punch 6 side II! 6a), ``At this time, the vertical protrusion 7a of the oddly curved blade 70 and the front protrusion 17a of the curved blade 17 are in a lap state with each other, and as a result, the workpiece W is The occurrence of excess wall thickness at the boundary (corner) of the flange to be formed is restricted. In addition,
The yoketoto 7 attaches the upper part 7b to the back part 6b and executes flan rug from a negative angle direction with respect to the pressing direction.

FIG. 4 shows the flanging operation of the side-curved blade 7 and the L-curved blade 17'D in more detail.

From this, the upper curved blade 17 approaches the workpiece W with the 1t L and VC set, and as a result, the upper curved blade 7 approaches in just a short time (al.Subsequently, the upper curved blade 17 7 lunges are applied to the workpiece ■ from the press direction, and 7 lunges W' are formed on the workpiece ■' (bl. At the same time, the bent blade 7 is applied from the negative angle direction with respect to the press direction. 97 Lunging is carried out, and a flanone coma is formed on the workpiece W, and a lug state with a required length L is present at the boundary between the flanging and the flanging (C), and due to the appearance of the lug state, There is no excess wall thickness of the flange portion to be formed at the boundary portion.

(Effects of the Invention) As described above in detail, the press device according to the present invention has a bent blade that performs 7 lunges from a negative angle direction with respect to the press direction, and a curved blade that performs 7 lunges from the press direction. The upper curved blade is arranged organically, and a means e is provided to take out the workpiece of the forming layer as appropriate.This makes it possible to remove the workpiece from the forming layer, which conventionally had to be done in two steps using two presses. It is now possible to perform a one-step process for all-around flanging, which previously would not have been possible, which reduces equipment investment costs, reduces maintenance costs, and improves productivity by shortening setup time. The effect of Qin was. This naturally serves as a basis for lowering product costs, and the same quality as before can be ensured, so the value of using this press apparatus is extremely high.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the structure of the main part of a press device for full-circumference seven flange according to the present invention, Fig. 2 is a schematic diagram showing the state of the workpiece during press working, and Fig. 6 is a cross-sectional view showing the bent blade and A perspective view showing the shape of the end of the upper curved blade and the state of the boundary between the flange 7, @
Figures 4 (al to (C) are schematic diagrams showing the 7-fold flange movement of the side-curving blade and the upper-curving blade. 1... Lower die main body 3... Bontero... Passive cam 7... Side-bending cam Curved blade 8...Arm 1
1...Flange lifter 16...Upper mold body 17
...Upper curved blade 18...Fixed cam patent applicant Toyota Motor Corporation Sai2 Spear 4 Prisoner (Q) 7 (C) 7

Claims (1)

[Scope of Claims] (lJ) A 2-ton passive cam installed on the lower die main body so as to be able to move forward and backward in the punch direction, and attached to the front end of the passive cam,
An oddly curved blade that performs υ flushing from the negative angular force direction with respect to the same V of the press, a workpiece pull-out arm located on the MU side of the biasing force and attached to the passive cam, and a setting W of the passive cam. 【side? A flange lifter for discharging the workpiece disposed on the side of the punch, and an L-curved blade attached to the die body so as to mutually lug the cutting blade and the terminal end.
and a fixed cam that is attached to the mold body and engages with the rear end of the passive cam to advance the passive cam +Jij? i: Complete press equipment for O flushing.