JP2001219233A - Scrap discharging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent scrap pieces from being bitten in a gap between a scrap chute and a chute groove with the scrap chute fitted thereto, and to smoothly discharge the scrap pieces. SOLUTION: A projecting bar 19 is provided in an eaves-like manner on a wall surface 16a above an erection surface 18a of the scrap chute 18 fitted to the chute groove 16. Even when the scrap pieces 15b divided into small and short strips would fall toward the gap g formed between the scrap chute 18 and the wall surface 16a of the chute groove 16, the scrap pieces 15b are prevented from being bitten in the gap g since the projecting bar 19 is provided thereabove.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scrap discharging apparatus capable of smoothly discharging scrap pieces generated when a non-product area is cut from a peripheral portion of a pressed product.

[0002]

2. Description of the Related Art Conventionally, when manufacturing a pressed product such as a fender panel or a door panel of an automobile, a non-product part is cut from a peripheral portion of the pressed product in order to make a pressed sheet metal member into a pressed product. When (trimming) is performed, this scrap is divided into a plurality of small short scrap pieces in order to facilitate processing of scrap (unnecessary scraps).

[0003] Scrap is cut into hundreds of scrap pieces in a single pressing step and continuously dropped on a scrap chute. The scrap pieces dropped on the scrap chute follow the inclination of the scrap chute. Slides down and is discharged out of the press.

[0004]

As shown in FIG. 3, a groove-shaped scrap chute 1 is mounted in a chute groove 2a formed integrally with a lower die body 2 of a trimming press. When one of the scrap pieces 3 falling from above is cut into the gap g between the upright surface of the scrap chute 1 and the chute groove 2a, the next scrap piece bites into the scrap piece 3 and is chained. And scrap pieces are gradually piled up,
Normal discharge of scrap pieces that fall continuously afterwards is hindered.

In this case, the production line must be temporarily stopped to remove the scrap pieces clogged in the scrap chute, resulting in poor production efficiency.

[0006] In addition, since the discharge status of scrap pieces must be monitored one by one, production management becomes complicated.

In view of the above circumstances, the present invention has a simple structure and does not penetrate into the gap between the scrap chute and the chute groove in which the scrap chute is mounted, and always discharges the scrap pieces smoothly. It is an object of the present invention to provide a scrap discharging device which can be easily managed.

[0008]

To achieve the above object, a first scrap discharging device according to the present invention is a groove-shaped scrap chute for discharging falling scrap pieces along a slope to the outside of a press. In the scrap discharge device which is mounted in a state where it is inclined in the chute groove,
A protrusion is provided on a wall surface of the chute groove above the scrap chute, and a protruding portion crossing an upper end surface of the scrap chute is provided.

In such a configuration, when the scrap piece falls on the scrap chute, the scrap piece that falls in the gap direction between the upper end surface of the scrap chute and the wall surface of the chute groove has a ridge portion provided above the scrap piece. As a result, there is no possibility of cutting into the gap.

[0010] The second scrap discharging device is characterized in that the ridge portion is formed integrally with the chute groove. In such a configuration, manufacturing is facilitated by integrally forming the ridge portion with the chute groove.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a main part of a scrap discharging device according to a first embodiment of the present invention. Reference numeral 11 in the figure denotes a lower die body of the press machine.
The lower die 12a of the scrap cutter 12 is placed and fixed thereon. An upper die 12b of the scrap cutter 12 is provided above the lower die 12a.

The upper die 12b is suspended from an upper die main body (not shown), and a guide bush provided on the upper die main body is engaged with a guide post 13 provided on the lower die main body 11, and the upper die main body 12b is provided. Is moved up and down while being positioned on the guide post 13.

The lower mold 12a of the scrap cutter 12 includes:
A plurality of lower die cutters 14a are provided, and a plurality of upper die cutters 14b corresponding to the respective lower die cutters 14a are provided on the upper die 12b.

Reference numeral 15 denotes a press product, and a non-product area 15a is formed on the outer periphery of the press product 15.

The lower die body 11 is jointly provided with a pair of corresponding cutters 14a and 14b to form a non-product area 15a.
Pieces 15 formed by cutting a piece into small short pieces
A slope 17 for guiding b toward the chute groove 16 is formed.

The chute groove 16 is formed integrally with or separately from the lower die body 11, has a predetermined inclination angle (30 ° in the present embodiment), and extends in the downstream scrap discharging direction. I have. A scrap chute 18 is mounted in the chute groove 16.

The scrap chute 18 is made of sheet metal formed in a groove shape, and extends along the chute groove 16 to a predetermined discharge portion provided outside the mold. The width of the scrap chute 18 is relatively loose relative to the width of the chute groove 16, and a gap g is formed between the wall surface 16 a of the chute groove 16 and the upright surface 18 a of the scrap chute 18. Is done.

The standing surface 18 of the scrap chute 18
Immediately above “a”, a pair of protruding ridges 19 are provided to face each other. The projections 19 protrude from the wall surface 16 a of the chute groove 16, and are provided on the upright surface 1 of the scrap chute 18.
8a is formed over the entire length of the wall surface 16a at a constant interval from the upper end surface of the wall surface 8a.

Each of the ridges 19 has an eave-like cross section, and an erect surface 18 a of the scrap chute 18.
Is slightly protruded inward across the upper end surface.

Next, the operation of the present embodiment having the above configuration will be described. First, the step of forming the ridge 19 will be described. The protrusion 19 is formed integrally with the wall surface 16a of the chute groove 16 formed integrally with or separately from the lower mold body 11 when the chute groove 16 is cast.

Therefore, when designing the mold of the chute groove 16, a portion to be the ridge 19 is integrally formed. Then, a foaming resin such as styrofoam is poured into the formed mold to create a disappearance model. Next, the vanishing model is embedded in molding sand, molten metal is injected to burn and evaporate the foamed resin, and a portion having a chute groove 16 is cast in place of this.

As described above, since the portion serving as the chute groove 16 is cast using the vanishing model, the ridge 19 can be easily formed integrally during casting.

After the casting having the completed chute groove 16 is subjected to sandblasting using shot blasting and the like, and mechanical processing such as cutting of a gate and deburring, a scrap chute 18 is inserted into the chute groove 16. Installing.

Since the width of the scrap chute 18 is designed to be relatively loose relative to the width of the chute groove 16, a ridge 19 is provided on the wall surface 16 a of the chute groove 16. However, for example, the chute groove 1
6 and a scrap chute 18 on its upright surface 18a.
The scrap chute 18 is directed downward, and then the upper end of the upright surface 18a is sunk into the lower surface of the ridge portion 19, so that the scrap chute 18
Attach to 6.

Next, the operation of the press in which the casting having the chute groove 16 is assembled in a predetermined manner will be described. When the press product 15 is placed on the lower mold 12a of the scrap cutter 12 in a predetermined manner, the scrap cutter 12
The upper die body (not shown) for fixing the upper die 12b descends, and first, the guide bush provided on the upper die body is
The upper die main body is engaged with the guide post 13 provided on the lower die main body 11 to which the 2a is fixed, and approaches the lower die main body 11 while being positioned.

Then, first, the pad vertically provided on the upper die body presses the pressed product 15 against the lower die 12a to fix and position it. Then, when the upper mold body further descends, the non-product portion region 15 formed on the peripheral portion of the pressed product 15 is formed.
a is a plurality of upper mold cutters 1 provided on the upper mold 12b.
4b, and a lower cutter 14a provided on the lower die 12a.
As the upper mold body descends, the non-product portion area 15a is divided into small short scrap pieces 15b, and the divided scrap pieces 15b are divided into lower mold body 1s.
It is dropped toward the chute groove 16 formed in the lower mold main body 11 via the slope 17 formed in 1 or directly.

A scrap chute 18 is mounted in the chute groove 16, and each scrap piece 15 b dropped on the scrap chute 18 is attached to the scrap chute 8.
Slides down along the slope of the press and is discharged out of the press.

At this time, even if the scrap piece 15b attempts to drop in the direction of the gap g between the upright surface 18a of the scrap chute 8 and the wall surface 16a of the chute groove 16, a protruding ridge is formed above the scrap piece 15b. 19 is protruded, so that the scrap pieces 15b are separated from the wall surface 16a by the gap g.
Scrap pieces can always be discharged smoothly without digging into the machine, and production line management becomes easier.

FIG. 2 is a sectional view showing a main part of a scrap discharging device according to a second embodiment of the present invention. In the first embodiment, the ridge 19 is formed in an eaves-shaped cross section, but in the present embodiment, the ridge 20 is formed in an isosceles triangular cross-section having the wall surface 16a as a base. Is the same as in the first embodiment.

The present invention is not limited to the above-described embodiments. For example, the ridges 19 and 20 may be retrofitted on the wall surface 16a of the chute groove 16.

[0031]

According to the first aspect of the present invention, since the projection is provided above the gap formed between the scrap chute and the chute groove in which the scrap chute is mounted, the scrap pieces are scrapped. Scrap pieces can always be smoothly discharged without entering the gap between the chute and the chute groove, and the production line can be easily managed.

According to the second aspect of the present invention, since the ridge portion is formed integrally with the chute groove, the manufacture becomes easy and the structure can be simplified.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a scrap discharging device according to a first embodiment.

FIG. 2 is a sectional view of a main part of a scrap discharging device according to a second embodiment.

FIG. 3 is an enlarged sectional view of a main part of a conventional scrap discharging device.

[Description of Signs] 15b scrap pieces 16 chute grooves 16a wall surfaces 18 scrap chutes 19, 20 ridges

Claims (2)

[Claims] 1. A scrap discharging device in which a scrap chute formed in a groove shape for discharging a falling scrap piece to the outside of a press along an inclined surface is mounted in an inclined state in the chute groove. A ridge portion is provided on a wall surface above the scrap chute to cross an upper end surface of the scrap chute. 2. A scrap discharging device according to claim 1, wherein said ridge portion is formed integrally with said chute groove.