JP5098671B2 - Press type scrap discharge device - Google Patents

Description

  The present invention relates to a press-type scrap discharge device, and more particularly to a scrap discharge device configured to discharge scrap generated in a press die for the purpose of trim processing or piercing processing to the outside of a lower die.

As this type of press-type scrap discharge device, for example, as disclosed in Patent Document 1, scrap generated by trimming or piercing is once transported to the next process together with a panel as a product and then recovered. In addition, a scrap chute with at least one end facing the lower mold is placed, and scrap generated by trimming or piercing is slid by its own weight on the scrap chute and discharged outside the lower mold. There is something like that.
JP-A-4-327329 (FIG. 6)

  When the scrap is discharged using the scrap chute as described above, the scrap sliding on the scrap chute can freely rotate, and therefore, clogging of the scrap is likely to occur on the scrap chute feeding path.

  In addition, as a result of the scrap being freely rotatable as described above, when the scrap shape is, for example, substantially rectangular, the scrap chute passage width is equal to or greater than the diagonal length of the scrap (the length of the diagonal line). The size is required, and a large opening for accommodating the scrap chute needs to be formed in the lower die, which is not preferable because the scrap chute is enlarged and the strength of the lower die is reduced. This tendency becomes more remarkable in the case of a so-called flat bar-shaped scrap whose length is several times larger than the width of the scrap, for example.

  The present invention has been made paying attention to such a problem, and is formed in the lower mold along with the reduction in the width of the scrap chute path by positively controlling the attitude of the scrap sliding down the scrap chute path. Therefore, the present invention aims to provide a press-type scrap discharge device that makes it possible to reduce the size of the opening and thereby make it easy to reduce the size of the scrap chute and ensure the strength of the lower die.

The present invention provides a flat bar-like scrap that is arranged in a lower die of a press die and is left on the lower die while being separated from the product area of the panel-like workpiece by press working based on the cooperation of the upper and lower dies. It is assumed that the device discharges outside the lower mold.

  In addition, the scrap chute is disposed with a slope inclined downward from the area of the panel-shaped workpiece positioned on the lower die to the outside of the lower die toward the outside of the lower die, and the scrap chute in plan view. The longitudinal direction of the feed path is arranged so as to be substantially orthogonal to the longitudinal direction of the region to be scrapped.

And at the upper end of the scrap chute and immediately below the area of the panel-like workpiece to be scraped, a pair of scrap attitude controls are separated by a distance at least capable of receiving the width dimension of the scrap. The scrap position control means has a ridge line scrap contact portion parallel to the longitudinal direction of the feed path and inclined in the same direction as the scrap chute, and the other scrap attitude control means has the above-mentioned scrap posture control means. Ridge-like scrap contact portions that are parallel to the longitudinal direction of the feed path and are inclined in the direction opposite to the scrap chute are formed.
Furthermore, while the upper end of the scrap chute is a movable chute that can be raised and lowered, the remaining portion of the scrap chute is a fixed chute, and a scrap attitude control means is provided on the movable chute. The scrap left on the lower die after the press working is lifted up while being transferred to both scrap contact parts of the scrap attitude control means by the lifting operation of the movable chute, and the scrap is made to its own weight. The attitude is changed autonomously.

  According to the present invention, as long as the scrap rides over both scrap contact portions, the scrap rotates autonomously by approximately 90 degrees while sliding down on the scrap contact portion by its own weight, and its longitudinal direction is the scrap chute. Since it becomes oriented in the longitudinal direction of the feed path, the scrap eventually slides down the scrap chute in the posture and is discharged to the outside. Therefore, the width of the scrap chute can be reduced to the minimum necessary size, and the size of the opening formed in the lower die for the placement of the scrap chute can be reduced. Strength can be easily secured.

  1 to 4 are views showing a more specific embodiment of the present invention. Here, an automobile door outer panel (hereinafter simply referred to as “panel”) W as a panel work is trimmed and bent. The example of the press die which processes simultaneously is shown.

  As shown in FIG. 1, a panel W that has been subjected to drawing, peripheral trimming, piercing, or the like up to the previous step is placed on a punch 1 as a lower mold and positioned. In the panel W, the door glass opening O inside the door sash part Ds is left with a bridge portion B as a scrap area that vertically cuts through the door glass opening O as a special feature of the panel W. Therefore, as shown in FIG. 2, the bridge portion B is cut as a so-called flat bar-shaped scrap S with a press die composed of a combination of the lower die 1 and the upper die 2, and at the same time, the cut portion is almost perpendicular. And finished as a flange portion F. The scrap S has a long rectangular shape whose length is several times larger than its width.

  The punch 1 as a lower mold is formed with a relatively large rectangular relief recess 3 in a portion corresponding to the door opening O, and the relief recess 3 is formed on the side surface of the punch 1 with an opening 4 on the outside. While being open, a pair of left and right lower blades 5 are provided in the escape recess 3. The escape recess 3 is provided with a channel-shaped scrap chute 6 having an open upper surface so as to protrude from the opening 4 to the outside. The scrap chute 6 has a downward slope from the escape recess 3 side toward the outside of the punch 1, and in the plan view of the punch 1, the longitudinal direction of the scrap chute 6 itself or the longitudinal direction of its feed path 6 a is They are arranged so as to be substantially orthogonal to the longitudinal direction of the bridge portion B, which is an area to be the scrap S. That is, the upper end of the scrap chute 6 is positioned directly below the bridge portion B that should become the scrap S.

  Here, in the present embodiment, the scrap S is autonomously changed in posture as described later, and the longitudinal direction thereof is directed to the longitudinal direction of the feed path 6a of the scrap chute 6, so that the scrap chute It is not necessary to consider the diagonal length of the scrap S when setting the width dimension of the six feeding paths 6a, and at least slightly larger than the width dimension of the scrap S is sufficient.

  Further, a scrap hopper 7 for collecting the scrap S is provided adjacent to the punch 1 at a position lower than the punch 1, and the lower end of the scrap chute 6 faces the scrap hopper 7.

  On the other hand, as shown in FIG. 2, the upper die 2 that forms a pair with the punch 1 as the lower die fixes a pair of sectional dies 9 that function as an upper blade to the upper holder 8, and the upper holder 8, the pad 16 is elastically supported via an elastic body (not shown). The sectional die 9 is commonly used for trimming (cutting) and flange bending. As shown in the figure, when the upper die 2 is lowered with respect to the punch 1, the lower blade 5 and the sectional die 9 are engaged. The bridge part B is cut into a scrap S with a shearing action based on the above, and the part cut as the scrap S is almost perpendicular with the engagement between the edge part 1a of the punch 1 and the sectional die 9 slightly later than that. To be finished as a flange portion F. Here, the scrap S formed by cutting the bridge portion B remains on the lower blade 5 even when the upper die 2 is lifted after processing.

  As shown in FIGS. 2 and 3 in addition to FIG. 1, the scrap chute 6 has a bridge B of the panel W positioned on the punch 1 or a high position extending to a position immediately below the scrap S left on the punch 1. The upper end portion on the side is divided as a movable chute 10 that can move up and down, and a portion other than the movable chute 10 is a fixed chute 11.

  As shown in FIGS. 1 and 3, the movable chute 10 has a feed path 10 a having a width dimension equivalent to that of the fixed chute 11 and is substantially box-shaped with three sides surrounded by side walls. Although the degree of inclination is lower than that of the fixed chute 11, it has a predetermined inclination in the same direction as the fixed chute 11. As shown in FIGS. 1 and 2, the movable chute 10 is located in a facing gap between the pair of lower blades 5 and is connected to a piston rod 12 a of a lift cylinder 12 provided below the movable chute 10. In accordance with the expansion / contraction operation of the lift cylinder 12, a lifting operation under a predetermined stroke, that is, a lift-up operation and a lift-down operation are possible.

  As shown in FIGS. 2 and 3, a pair of scrap receiving stays 13 having a solid cylindrical shape or a round bar shape is provided on the running path 10a of the movable chute 10 as scrap posture control means. That is, a pair of scrap receiving stays 13 are provided on the feed path 10a of the movable chute 10 via a round bar-like stud 14 with an opposing gap at least capable of receiving the width dimension of the scrap S. The axes of the scrap receiving stays 13 are parallel or substantially parallel to each other, and at the same time, the axis of each scrap receiving stay 13 is in the longitudinal direction of the feed path 10a (the direction in which the scrap S slides down by the scrap chute 6). Match or nearly match.

  Here, in a plan view of the punch 1, both scrap receiving stays 13 are bridge portions B attached to the panel W to be positioned on the punch 1 or scrap S left on the lower blade 5 after cutting. Is located in the opposite gap between the pair of lower blades 5.

  Each one of the scrap receiving stays 13 has a predetermined inclination inclined in the same direction as the scrap chute 6, and each of the other scrap receiving stays 13 has a predetermined inclination inclined in the opposite direction to the scrap chute 6. Thus, a round bar-like stopper 15 projects upward at the higher end of each scrap receiving stay 13. As a result, as will be described later, the ridge line on the upper surface side of each scrap receiving stay 13 is set so as to function as the scrap contact portion 13a by directly making line contact or point contact with the scrap S.

  As shown in FIG. 2, when the movable chute 10 is at the lowest lowered position, the bridge B attached to the panel W to be positioned on the punch 1 or left on the lower blade 5 after cutting. The scrap receiving stays 13 are set so as not to interfere with the scrap S, and when the scrap receiving stays 13 are lifted up together with the movable chute 10 under a predetermined stroke as shown in FIG. 5, the scrap S remaining on the upper side is lifted up by the scrap receiving stay 13, and the scrap S is transferred from the lower blade 5 to each scrap receiving stay 13 side.

  Moreover, the stopper 15 is not necessarily required when the behavior at the time of autonomous change of the scrap S as described later is performed stably.

  Therefore, according to the scrap discharging apparatus configured as described above, when the upper die 2 is lowered with respect to the punch 1, the movable chute 10 stands by at the lowest position shown in FIG. When the upper die 2 is lowered, as shown in the figure, the pad 16 precedes and abuts against a part of the panel W to pressurize and restrain the panel W, and the sectional die 9 on the upper die 2 side lowers the lower blade 5. The bridge portion B that meshes with the edge portion 1a of the punch 1 and is attached to the panel W is cut as scrap S, and the flange F portion is bent at the cut portion. Note that the scrap S is left as it is on both lower blades 5.

  After the completion of these processes, the movable chute 10 is lifted up together with the scrap receiving stays 13 based on the extension operation of the lift cylinder 12 as shown in FIG. When each scrap receiving stay 13 is lifted up, the scrap receiving stay 13 lifts up the scrap S remaining on the lower blade 5 by a predetermined amount so that the scrap S straddles both scrap receiving stays 13 at that time. Then, it is transferred onto each scrap receiving stay 13 from the lower blade 5 side.

  When the scrap S is lifted up by the scrap receiving stay 13, the longitudinal direction of the scrap S and the axis of each scrap receiving stay 13 are substantially orthogonal to each other as shown in FIG. Direct contact or point contact is made with respect to the scrap contact portion 13a which is a ridge line on the upper surface side of the scrap receiving stay 13, and the scrap contact portion 13a is selected according to the gradient of each scrap receiving stay 13 as shown in FIG. Since the scrap S rotates about 90 degrees while sliding down under its own weight, the scrap S autonomously changes its posture by about 90 degrees. Initially, the longitudinal direction of the scrap S and the axis of each scrap receiving stay 13 were substantially orthogonal to each other, but the longitudinal direction of the scrap S and each scrap receiving stay were changed by the autonomous attitude change of the scrap S itself. This means that both of the 13 axial lines are oriented substantially in the same direction, that is, in the longitudinal direction of the feed path 6a of the scrap chute 6.

  As a result, as described above, since the gap between the pair of scrap receiving stays 13 is set to a size that can accept at least the width dimension of the scrap S, the posture is autonomously changed by about 90 degrees. The scrap S thus dropped by its own weight onto the feed path 10a of the movable chute 10 from the facing gap between the pair of scrap receiving stays 13.

  In this way, the scrap S that has fallen by its own weight on the movable chute 10 is transferred to the fixed chute 11 below the fixed chute 11 while maintaining the post-change attitude, so that the fixed chute 11 slides down. It is discharged to the outside of the punch 1, and finally falls from the fixed chute 11 of FIG. 1 to the scrap hopper 7 and is collected. When the scrap S is discharged to the outside of the punch 1, the movable chute 10 including the scrap receiving stay 13 is lifted down based on the contraction operation of the lift cylinder 12 to return to the initial state of FIG. Wait until the press cycle.

  As described above, according to the present embodiment, the scrap S left on the lower blade 5 can be easily and stably processed, and the longitudinal direction of the scrap S is directed to the longitudinal direction of the scrap chute 6. Therefore, it is not necessary to consider the diagonal length of the scrap S when setting the width dimension of the feed path 6a of the scrap chute 6, and at least the width of the scrap S. Since the size slightly larger than the size is sufficient, the scrap chute 6 can be significantly reduced in size and the scrap S can be prevented from being clogged. As a result, the size of the opening formed in the punch 1 as the lower mold for the arrangement of the scrap chute 6 can also be reduced, and thereby the strength of the punch 1 can be easily secured.

  FIG. 5 is a diagram showing a second embodiment of the invention, and the same reference numerals are given to the parts common to FIG.

  In the second embodiment, a part of the movable chute 20 itself is effectively used to have functions as a scrap attitude control means and a scrap contact portion. That is, as shown in FIG. 5, a substantially triangular scrap receiving piece 21 as a scrap posture control means is integrally formed on the side walls 20 a opposed to each other in the movable chute 20 so as to extend upright, and the scrap receiving piece. The upper end surface of 21 is a ridgeline scrap contact portion 21a. Note that the slope of the scrap contact portion 21a is set in accordance with the scrap contact portion 13a of the previous scrap receiving stay 13.

  Here, when the upper end surface of the scrap receiving piece 21 is used as it is as the scrap contact portion 21a, depending on the thickness of the scrap receiving piece 21, the scrap contact portion 21a is ridged so that the scrap S is in line contact or point contact. For example, it is desirable to finish in a knife edge shape. Alternatively, as shown in FIG. 6, a predetermined curvature is obtained by performing hemming processing (see FIG. 6A) or curling processing (see FIG. 4B) along the longitudinal direction on the upper end portion of the scrap receiving piece 21. It is desirable that the ridge line portion be a scrap contact portion 21a.

  According to the second embodiment, since separate parts such as the stud 14 and the scrap receiving stay 13 in the first embodiment are not necessary, the structure can be simplified by reducing the number of parts. Since the distance from the feed path 20b of the movable chute 20 to the scrap contact portion 21a can be made smaller than that of the embodiment, the so-called dance phenomenon when the scrap S after the posture change falls on the feed path 21b Scattering is prevented, which is further advantageous in preventing clogging of the scrap S.

The figure which shows more specific 1st Embodiment of the scrap discharge device which concerns on this invention, and is a perspective view of the lower mold | type containing the panel used as a process target. The expanded sectional view which follows the AA line of FIG. 1 when an upper mold | type descend | falls. FIG. 3 is an enlarged perspective view of the movable chute shown in FIGS. FIG. 3 is a cross-sectional view when the movable chute performs a lift-up operation after the upper mold of FIG. The expansion perspective view which shows another example of a movable chute | shoot as 2nd Embodiment of this invention. (A) And (B) is C section expanded sectional drawing of FIG.

Explanation of symbols

1 ... Punch (lower mold)
2 ... Upper mold 5 ... Lower blade 6 ... Scrap chute 6a ... Transmission path 8 ... Up holder 9 ... Sectional die (upper blade)
DESCRIPTION OF SYMBOLS 10 ... Movable chute 10a ... Feeding path 11 ... Fixed chute 12 ... Cylinder 13 ... Scrap receiving stay (scrap attitude control means)
13a ... scrap contact portion 16 ... pad 20 ... movable chute 21 ... scrap receiving piece (scrap attitude control means)
21a ... Scrap contact part B ... Bridge part F ... Flange part S ... Scrap W ... Door outer panel (Panel work)

Claims (5)

A device that is disposed in the lower mold and discharges the flat bar-shaped scrap left on the lower mold while being separated from the panel-shaped workpiece by pressing based on the cooperation of the upper and lower molds,
Of the panel-like work positioned on the lower mold, it is arranged with a downward slope from directly below the area to be scrapped to the outside of the lower mold, and the longitudinal direction of the feed path should be scrap in plan view A scrap chute arranged substantially perpendicular to the longitudinal direction of the region;
Scrap postures arranged in pairs at the upper end of the scrap chute and immediately below the area of the panel-like work to be scraped, at least a distance sufficient to accept the width of the scrap and control hand stage,
Formed on one scrap attitude control means longitudinally and ridge-shaped scrap contact portion which is and inclined to scrap chute the same direction which is parallel to the sending passage, and formed on the other of the scrap attitude control means feeding the A ridge-shaped scrap contact portion parallel to the longitudinal direction of the road and inclined in the opposite direction to the scrap chute ,
With
While the upper end of the scrap chute is a movable chute that can be raised and lowered, the remaining part of the scrap chute is a fixed chute,
The movable chute is provided with scrap attitude control means,
The scrap left on the lower die after press working is lifted up while being transferred to both scrap contact parts of the scrap attitude control means with the lifting movement of the movable chute, and the scrap is autonomously moved by its own weight. A press-type scrap discharging device characterized in that the posture is changed .   When scrap comes into contact with both scrap contact parts, the scraps slide down along both scrap contact parts by their own weight, so that the longitudinal direction of the scrap can be changed to the scrap chute route. 2. The press-type scrap discharging apparatus according to claim 1, wherein an inclination angle of each scrap contact portion is set so as to be oriented in the longitudinal direction.   3. The press-type scrap discharging apparatus according to claim 1, wherein each scrap posture control means is in a round bar shape, and a ridge line on the upper surface side is used as a scrap contact portion. At least the movable chute forming the scrap chute is in the shape of a channel with an open upper surface, and part of the side walls on both sides also serve as scrap attitude control means, 3. The press-type scrap discharging apparatus according to claim 1, wherein a scrap contact portion inclined in opposite directions is formed on the upper end surface. Scrap left on the lower mold after press working by lift-up while placing both scrap contact portion side of the scrap attitude control means with a lifting operation of the variable Doshiki chute autonomously the scrap at its own weight is the attitude change Rutotomoni any one of claims 1 to 4, characterized in that is adapted to transfer at its own weight the scrap stationary chute side through the movable chute from its scrap contact portion press type scrap ejector according to One.

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