JPH11156632A - Material guide device for shearing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate positional aligning of an angle steel member and prevent floating at the time of machining. SOLUTION: A plurality of screw holes are formed on proper positions of a base 5 in front of a die 2. Screws of a clamp screw 14 are fitted with the screw holes for sandwiching and fixing a pressing plate so as to position an angle steel material 12. A surface of the pressing plate 13 to which the angle steel material 12 is abutted is flat plane suitably for a guide surface of the angle steel material 12 to be inserted into the die 2. Guide surfaces 13C1 , 13C2 , 13C3 , 13C4 are plurally formed according to thickness of the angle steel material 12. On the upper side thereof, a plurality of projections 13C1 , 13C2 , 13C3 , 13C4 are similarly formed according to the thickness of the angle steel material 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material guiding device for a shearing machine mainly for shearing a material such as an angle steel material.

[0002]

2. Description of the Related Art As shown in FIG. 7, when connecting parts with an angle steel material, a metal mold 2 in which a steel material is cut out in a right-angled shape as shown in FIG. 13 (hereinafter, this metal mold is called a notch metal mold) is used. Had been processed. In the processing step of the angle steel material, first, the end of the angle steel material 12 is cut out in a square shape as shown in FIG. 8 (first step). Next, as shown in FIG. 9, a notch is cut out from the direction perpendicular to the first step by the thickness and dimension of the angle steel material 12 (second step), and finally, the corner of the tip is dropped as shown in FIG. 10 (third step).

[0003] As described above, the angle steel material 12 is processed in three steps (this processing is generally called corner cutting).
Conventionally, in the second step, as shown in FIG. 11, the material holding plate 13 is provided with a guide surface 13c and a projection 13d corresponding to the maximum thickness of the angle steel material 12, and the angle steel material 12 is inserted into the guide surface 13c. , And were sheared in alignment.

[0004]

In the conventional shearing machine, the dimensions of the guide surface 13c and the projection 13d of the material holding plate 13 are adjusted to the maximum thickness of the angle steel material 12 which can be machined, as shown in FIG. When the thin angle steel material 12 is machined, there is a problem that the holding of the guide surface 13c of the material holding plate 13 becomes unstable, the notch size varies, and the non-machining side of the angle steel material 12 floats during the machining.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to enable accurate shearing regardless of the thickness of a material.

[0006]

An object of the present invention is to provide a material holding plate having a plurality of guide surfaces for guiding a material to a mold, a material holding plate provided with a convex portion on each of the plurality of guide surfaces, and a material holding plate. This is achieved by providing fixing means for fixing the mold in place.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 and 2 are side sectional views of a notch mold, FIG. 3 is a perspective view of a shearing machine having the notch mold, FIG. 4 is a plan sectional view of the notch mold, and FIG. FIG. 6 is a plan view of the notch mold during the second process.

In FIG. 3, a mold 2 for shearing a steel plate is provided below the opening of a C-shaped frame 1 having a central opening, and a ram for pushing down a movable portion of the mold 2 is provided above the opening. The ram 4 is operated by a hydraulic pump in the frame 1 (not shown) by stepping on the foot switch 3 connected to the main body.

Next, the configuration of the mold 2 will be described. In FIG. 1, a support 8 for guiding a holder 7 to be vertically movable is provided on a base 5, and a plate 9 is attached to the upper end of the support 8 so that the holder 7 does not come off.
A right-angled press blade 6 is attached to the lower end of the holder 7, and a plurality of springs 10 are provided between the base 5 and the holder 7.
And urges the holder 7 upward until the holder 7 comes into contact with the plate 9. On the base 5, a receiving blade 11 which is opposed to the pressing blade 6 and is cut in a right angle is provided, and the clearance between the pressing blade 6 and the receiving blade 11 is 0.3.
mm.

[0010] As shown in FIG.
A plurality of (three in this embodiment) screw holes 15 (15a, 15b, 15c) are provided at appropriate places on the base 5.
A holding plate 13 for positioning an angle steel material 12 as a material is provided on the base 5, and the holding plate 13 has an elongated hole 1.
3e, a clamp screw 14 serving as a fixing means is inserted into the long hole 13e, and the screw portion 14a of the clamp screw 14 is screw-fitted to one of the screw holes 15 so that the presser plate 13 becomes the base. 5 and fixed.

The holding plate 13 has a home base shape, and the surface with which the angle steel material 12 comes into contact in the first step is a guide surface 13a or a guide surface 13b which is notched obliquely, and the angle steel material 12 is formed in the second step. The contact surfaces are a plurality of (four in the present embodiment) guide surfaces 13c (13c ₁ , 13c ₁ ,
13c ₂ , 13c ₃ , 13c ₄ ). Protrusion 13d on the upper side of the guide surface _{13c (13d 1, 13d 2,} 13d 3, 1
3d ₄ ), and the angle steel 12 is guided to the guide surface 1 during processing.
3c, the angle steel material 12 becomes convex 13
d supports the angle steel 12
Is controlled.

In the above configuration, as shown in FIG. 5, the angle steel member 12 is supported on the guide surface 13a of the holding plate 13 and is set in the mold 2, and the clamp screw 14 is screwed into the screw hole 15b at the center to hold the holding member. The plate 13 is clamped and fixed. When the foot switch 3 is depressed in this state, the ram 4 is lowered, the holder 7 is pressed by the ram 4, and the angle steel 12 is sheared by the pressing blade 6 as shown in FIG. The above processing is the first step of corner cutting. The sheared shear pieces are discharged from the shear piece discharge port 1a. When the foot is released from the foot switch 3, the ram 4 rises and the holder 7 returns to the original position by the restoring force of the spring 10.

Next, the clamp screw 14 is loosened, and the clamp screw 14 is screwed into the screw hole 15a on the left side so that the dimension A of the angle steel material 12 which becomes the notch width dimension becomes the thickness of the angle steel material 12. , The position of the holding plate 13 is set. As shown in FIGS. 1 and 6, the side surface of the angle steel material 12 is brought into contact with the guide surface 13 c ₁ of the holding plate 13 to
Set to. When the foot switch 3 is depressed in this state, the angle steel 12 is sheared as shown in FIG.
The above processing is the second step of corner cutting. During shearing, angle steel 12 guide surface 13c ₁ and the convex portion 13
to be supported on the d _1, lifting angle steel is prevented. Finally, the corner of the tip is dropped as shown in FIG. This is the third step of corner cutting. When performing the second step of the corner cutting on the opposite side, the clamp screw 14 is screwed into the screw hole 15c on the right side, and the angle steel material 12 is supported on the guide surface 13b of the holding plate 13 so as to be fixed to the mold 2. Shearing is performed by setting.

In the second step of processing the thin angle steel 12, the side surface of the angle steel 12 is brought into contact with the guide surface 13 c ₄ of the holding plate 13 as shown in FIG. At the time of shearing, the angle steel 12 is guided by the guide surface 13c _4.
Is supported by the convex portions 13d ₄ and.

[0015]

According to the present invention, when the angle steel is inserted into the mold during the second step of the corner cutting of the angle steel, there are a plurality of guide surfaces corresponding to the thickness of the angle steel. By setting the presser plate to the machine, many angle steel materials can be easily sheared continuously. In addition, a guide surface and a convex part are provided on the upper side of each guide surface to prevent lifting, corresponding to the thickness of the angle steel material, so that the movement of the angle steel material during shearing can be regulated, processing can be performed accurately, and workability is improved. it can. Further, the cost is almost no increase compared with the conventional mold, and it is an inexpensive material guiding means.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a notch mold showing an embodiment of the present invention.

FIG. 2 is a side sectional view of a notch mold showing the embodiment of the present invention.

FIG. 3 is a perspective view of a shearing machine having a notcher mold.

FIG. 4 is a plan sectional view of a notch mold.

FIG. 5 is a plan view of a notch mold during a first process.

FIG. 6 is a plan view of a notch mold during a second process.

FIG. 7 is a perspective view of a frame assembled from angle steel.

FIG. 8 is a processing example of a first step of corner cutting;

FIG. 9 is a processing example of a second step of corner cutting;

FIG. 10 is a processing example of a third step of corner cutting;

FIG. 11 is a side sectional view of a conventional notcher mold.

FIG. 12 is a side sectional view of a conventional notcher mold.

FIG. 13 is a plan view of a conventional notch mold during the second step processing.

[Explanation of symbols]

2: mold, 12: angle steel, 13: holding plate, 13c
_{1, 13c 2, 13c 3,} 13c 4 ... guide surface, 13d _{1, 1}
3d ₂ , 13d ₃ , 13d ₄ ...

Claims (2)

[Claims] 1. A shearing machine having a mold for shearing a material by power such as hydraulic pressure, wherein a plurality of guide surfaces for guiding the material to the mold, and a convex portion is provided on each of the plurality of guide surfaces. A material guiding device for a shearing machine, comprising: a material holding plate provided with a fixing member; and fixing means for fixing the material holding plate to an appropriate position of a mold. 2. The fixing device according to claim 1, wherein the fixing means comprises a plurality of screw holes at appropriate positions of a mold, and a clamp screw which is screwed into one of the screw holes to clamp and hold the material holding plate. The material guiding device for a shearing machine according to claim 1, wherein