JPH02112844A - Deburring device - Google Patents

Abstract

PURPOSE:To prevent a burr after blanking from being fitted into a formed part and a die by providing an edge part for cutting an outer burr into plural ones at least on one part in either the upper or the lower dies. CONSTITUTION:A formed part 20 is set onto the lower die body 6, and the formed part 20 is fixed to the lower die body 6 by a ring holding frame 4. Subsequently, by allowing a punch 10 and the upper die body 3 to descend, an inner burr 23 and an outer burr 24 of the formed part 20 are blanked. As a result, the disk-like inner burr 23 drops down into a through-hole 15 of the lower die body 6. On the other hand, the roughly circular arc-like outer burr 24 is cut as to the vicinity of its center by an edge part 8 of an edged frame 7, becomes two pieces of outer burr scraps 25, 25, and thereafter, drops down from the lower die body 5. In such a way, the outer burr 24 after blanking is cut and not fitted into the formed part 20 and the die, therefore, it is unnecessary to provide a means for eliminating the outer burr 24 after blanking which is adhering.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Field of Industrial Application] The present invention relates to a deburring device for removing burrs formed on a molded product by punching.

[Conventional technology]

As a conventional deburring device for molded products,
There are those shown in No. 37543, Japanese Patent Publication No. 61-4295, etc.

[Problem to be solved by the invention]

As shown in FIG. 10, the inner burr 323 and outer IJ 324 shown by the two-dot chain line of the molded product 320 are punched out in one step. A scrap receiver provided in the lower die 305 falls into the section 306.

However, the outer burr 32 punched by the upper die 302
4 has a ring shape, so there is a problem that it rises low on the outer periphery of the punch 310 or is attached to the molded product 320 as it is. As a countermeasure for this, it is necessary to provide an extra means such as a stripper for removing the outer burr 324 from the punch 310 or the molded product 320.

In addition, as shown in FIG.
In the deburring device 401 for punching in the direction, the punched outer burr 424 fits into the outer periphery of the lower die 405.
Unfortunately, a separate means of removing this is required.

Structure of the Invention [Means for Solving the Problem] A blade portion for cutting the outer burr into two or more pieces is provided at at least one location of the upper mold and the lower mold.

[Examples and effects]

Embodiments of the present invention will be described below based on the drawings.

1 and 3 show a deburring device 1 according to a first embodiment of the present invention and a molded product 20 to be deburred, and FIG. 1 shows the state after deburring, and FIG. represents the state before deburring.

In the figure, 2 indicates the upper mold body 3 and the ring presser piece 4.
5 is a lower die consisting of a lower die body 6 and a piece with a blade 7; 10 is a punch. The upper end of the punch IO is set in a punch set ring 11, and the punch set ring 11 is further set in a punch holder 12. Further, 13 is a punch plate, and 14 is a lower die holder.

A spring 30 is installed between the punch set ring 11 and the ring holding piece 4.

As shown in FIG. 5, the aforementioned lower mold body 6 has a bladed piece 7 sectioned at a position corresponding to approximately the center of the outer burr 24 of the molded product 20 shown by the two-dot chain line. This bladed piece 7
As shown in FIG. 6, it consists of a cylindrical portion 16 and a cubic portion 17, and one side of the cubic portion 15 is the blade portion 8. When the bladed piece 7 is set on the lower mold body 6,
The blade part 8 and the ring receiver of the lower die main body 6 are at the same height as the part 9. The inner diameter side of the ring receiver part 9 is the through hole 1.
It's now 5.

As shown in FIG. 2, the molded product 20 is formed by hot forging and consists of a handle part 21 and a ring part 22. The ring part 22 has an inner burr 23 on the inner diameter side and an inner burr 23 on the outer diameter side. External burrs 24 are generated over almost the entire circumference.

Next, a method for removing burrs from the molded product 20 using the above-mentioned burr removal apparatus 1 will be described.

First, the molded product 20 is set on the lower mold body 6, and as shown in FIG.
Fixed to. At this time, the spring 30 is in an expanded state.

Next, as shown in FIG. 1, the punch 10 and the upper mold body 3 are lowered to punch out the inner burrs 23 and outer burrs 24 of the molded product 20. Then, the disc-shaped inner burr 23 falls into the through hole 15 of the lower mold body 6. On the other hand, the approximately arc-shaped outer burr 24 is cut near its center by the blade part 8 of the bladed piece 7, and is divided into two pieces of outer burr scrap 25 as shown in FIG.
．． 25, it falls from the lower die main body 5, as shown in FIG. Even if the outer burr 24 after punching is not cut and 1" remains, when the outer burr 24 of the molded product 20 to be deburred next is punched out, the outer burr 24
are stacked, and the lower outer burr 2 is punched out first.
4 is pushed by the upper outer burr 24 and is surely cut.

In this way, the outer burr 24 after punching is cut off and does not fit into the molded product 20 or the mold, so it is necessary to provide a means for removing the outer burr 24 after punching that adheres to them. There is no.

The molded product 20 after the above process is as shown in FIG.
A hole 26 is formed inside the ring portion 22, and the outer burr 24 (FIG. 2) on the outside of the ring portion 22 is completely removed.

In the first embodiment, one piece of the cube-shaped part of the bladed piece is used as the blade part, but in the second embodiment of the present invention, as shown in FIG. The top side of the roof-like portion 17 of the blade piece 107 consisting of the portion 17 may be used as the blade portion 108.

Further, in the first and second embodiments of the present invention, the blade portion is provided in a bladed piece separate from the lower mold, but in the third embodiment, the blade portion is provided in the lower mold body. It may be formed integrally with.

Next, a fourth embodiment of the present invention in which the blade portion is integrally formed with the upper die will be described based on FIGS. 8 and 9.

Reference numeral 201 denotes a deburring device, which is installed at the upper edge of the through hole 215 of the annular lower die 205, as shown in the left half of FIG. The outer burr 224 of the molded product 220 is locked in the part 209 of the molded product receiver, and then the punch 210 is pressed while the outer burr 224 is pressed against the lower mold 205 with the upper mold 202, as shown in FIG. The molded product 220 is dropped downward, that is, into the through hole 215 of the lower die 205. This upper mold 202 is annular and has blade parts 208, 208 formed at two locations on the diameter of the end face 203 as shown in FIG. , the blade parts 208, 208 can cut into two pieces of arc-shaped outer burr scrap 225.

Therefore, the outer burr 224 after being beaten does not adhere to the upper die 202 and rise.

Effects As described above, according to the present invention, since the outer burr after punching is cut into two or more pieces, it does not fit into the molded product or mold, so the burr after punching can be cut into two or more pieces. There is no need to provide means for removal from the product or mold.

[Brief explanation of the drawing]

1 and 3 are sectional views of a deburring device according to the first embodiment of the present invention, FIGS. 2 and 4 are plan views of a molded product, and FIG. 5 is a sectional view of a deburring device according to a first embodiment of the present invention. FIG. 6 is a perspective view of the bladed piece shown in FIGS. 1 and 3, FIG. 7 is a perspective view of the bladed piece according to the second embodiment of the present invention, and FIG. 8 is a perspective view of the bladed piece according to the second embodiment of the present invention. FIG. 9 is a bottom view of the upper die 202 of FIG. 8, and FIGS. 10 and 11 are cross-sectional views of a conventional deburring device. (Explanation of symbols) 1... Deburring device. 2...Top mold. 5...Bottom mold. 8...Blade
Department. 20... Molded product. 24...
...Outside Bali.

Claims (1)

[Claims] In a deburring device 1 for punching out an outer burr 24 of a molded product 20 using an upper die 2 and a lower die 5, a blade portion 8 for cutting the outer burr 24 into two or more pieces is selected from among the upper die 2 and the lower die 5. A deburring device characterized in that it is provided at at least one location.