JP3444044B2 - Shearing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art There are the following two types of angle steel materials, which are roughly classified into right-angled notches. As shown in FIG. 8, the end portion of the angle steel material 12 is cut out into a rectangle (hereinafter, this processing is referred to as a corner cut), and as shown in FIG.
2 may be cut into a triangle (hereinafter, this processing is referred to as a 90 ° V-shaped notch). In general, these two types of processing are performed by a die having a holder 7 having right-angled pushing blades 6 and 6 and a receiving blade 11 having a right-angled notch portion facing the holder 7 Is called a notcher die).

When making a 90 ° V-shaped notch, the angle steel material 12 can be set relatively easily by pressing the angle steel material 12 against the cutting edge of the pushing tool 6 as shown in FIG. When making a corner cut, the angle steel material 12 is set as shown in FIG. 14, but the notch length in the longitudinal direction of the angle steel material 12 (dimension C in FIG. 8) is the length of the angle steel material 12 drawn before the work. Was entered, and the drawing line and the blade edge of the push blade 6 were visually aligned to make a notch.

[0004]

In the conventional shearing machine, when the corner is cut, it is troublesome to write the drawing line on the angle steel material 12, and the shearing position is set by visual alignment. take time. Further, if the shearing position is displaced, the workability is poor, for example, it takes a long time for welding with another angle steel material by welding in the subsequent process.

An object of the present invention is to eliminate the above-mentioned problems of the prior art and improve workability at the time of corner cutting.

[0006]

The above object is to provide a male die having a right-angled blade in a frame and a female die having a right-angled notch portion facing the male die, and by using power such as hydraulic pressure. In a shearing machine that moves the male die toward the female die and shears the steel sheet, a lower end of a supporting member that movably supports a stopper that positions a notch length of the steel sheet faces the female die.
And support them by arranging them so that they are positioned with a predetermined interval.
Having a fixing means for fixing the position of the stopper member
This is accomplished by providing a material positioning device .

[0007]

With the above configuration, the corner cut positioning operation is completed by moving the stopper to the notch size in the longitudinal direction of the angle steel material and fixing the position of the stopper. At the time of processing, the angle steel material may be abutted against the stopper.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 2 is a perspective view of a shearing machine having a notcher die, FIG. 7 is a view showing an example of corner cutting, and FIG.
Is a plan view of a notcher die set with an angle steel material for 90 ° V-shaped notch processing, FIG. 9 is a diagram showing a processing example of a 90 ° V-type notch, and FIG. 10 is a plan view of a notcher die set with a flat plate 11, FIG. 11 is an enlarged view of the vicinity of the stopper, and FIG. 12 is a sectional view taken along the line DD of FIG.

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

The structure of the mold 2 will be described with reference to FIGS. 1 and 3 to 6. FIG. 1 is a perspective view of the notcher mold, and FIG. 3 is an enlarged view of the vicinity of the stopper. 4 is a sectional view taken along the line AA of FIG.
FIG. 5 is a plan sectional view of the notcher die, and FIG. 6 is a plan view of the notcher die set with the angle steel material at the time of corner cutting.

In FIG. 4, a support 8 for vertically moving a male holder 7 is provided on a base 5, and a plate 9 is attached to the upper end of the support 8 to prevent the holder 7 from coming out upward. . The holder 7 is attached to the lower end of the holder 7 so as to form a right-angled shape with the two pressing blades 6 and 6, and a plurality of springs 1 are provided between the base 5 and the holder 7.
0, 10 ... Intervene and urge the holder 7 upward until it abuts the plate 9. Further, on the base 5, there is provided a female receiving blade 11 facing the pushing blade 6 and being cut out in a right-angled shape, and the pushing blade 6 and the receiving blade 11 are provided.
Is attached so that the clearance is about 0.3 mm.

In FIG. 6, a holding plate 13 for positioning the angle steel material 12 as a material is provided on the base 5 in front of the receiving blade 11, and the holding plate 13 is provided with an elongated hole 13a. By inserting the clamp screw 14 into 13a and screwing the screw portion of the clamp screw 14 into a screw hole (not shown) formed in the base 5, the holding plate 13 is clamped and fixed to the base 5. The pressing plate 13 has a home base shape because the pressing method of the angle steel material 12 changes depending on the type of shearing work. When the angle steel material 12 is sheared by a corner cut, the guide surface 13b cut out diagonally is a guide surface. 13c, when the angle steel 12 is sheared by a 90 ° V-shaped notch, a planar guide surface 13d
To use. The shearing die 2 configured as described above is generally called a notcher die.

The short sides 17a of the two arms 17, 17, which are support members bent in a "V" shape, are horizontally fixed to the support 8 by bolts 18, respectively, and the long sides 17b are located outside the pushing blade 6. It is located parallel to. At this time, the arm 17 is mounted at a position B (FIG. 4), which is the distance between the upper surface of the receiving blade 11 and the lower end of the arm 17 (generally, preferably 8 mm or less) so that a finger cannot enter from there. There is. The long side portion 17b of the arm 17 has an elongated hole 17c in the horizontal direction, and the knob bolt 19 is provided in the elongated hole 17c.
The stopper 16 is supported by the arm 17 by penetrating the threaded portion 19 a of the above and screwed into the female threaded portion 16 a of the stopper 16 located inside the arm 17. The stopper 16 is horizontally movable within the range of the elongated hole 17c, and is fixed to the arm 17 by tightening the knob bolt 19. The stopper 16 is formed in an “L” shape, and the stopper 1
The short side portion 16b of 6 contacts the upper surface 17d of the arm 17,
It is movable along the arm 17 with the upper surface 17d as a guide. Further, the short side portion 16b also has a function of preventing rotation when the knob bolt 19 is rotated. Also, FIG.
As shown in FIG. 3, the female screw portion 16 a of the stopper 16 is located slightly below the center of the stopper 16, and the knob bolt 19 is slightly below the center of the stopper 16 and the stopper 1
6 is screwed together. Therefore, if the knob bolt 19 is loosened, the stopper 16 is replaced upside down, and the short side portion 16b is on the lower side as shown in FIG. 12, the distance between the upper surface of the receiving blade 11 and the lower portion of the arm 17 becomes narrower than that of the flat plate 15. ,
The flat plate 15 can be abutted against the stopper 16. As shown in FIG. 3, scales 20 and 20 indicating the distance from the blade edge 6a where the pressing blades 6 and 6 are in contact with each other are attached above the pressing blades 6 and 6 of the holder 7. Although the scale 20 is attached to the holder 7 in this embodiment, it may be attached to the receiving blade 11 or the arm 17.

A processing procedure for corner cutting in the above structure will be described. First, the end face 1 of the scale 20 and the stopper 16 is set to the dimension C which is the notch length in the longitudinal direction shown in FIG.
6c are aligned (40 mm in FIG. 3), and the knob bolt 19 is tightened at this position to fix the stopper 16. Next, the angle steel material 12 is inserted until the end face of the vertical side portion 12a hits the stopper 16 as shown in FIG. 6, and the guide surface 1 of the holding plate 13 is inserted.
The vertical side portion 12a of the angle steel material 12 is pressed by 3b, and the pressing plate 13 is fixed by the clamp screw 14. When performing the corner cut on the opposite side, the angle steel material 12 is pressed by the guide surface 13c of the pressing plate 13. When the foot switch 3 is stepped on in this state, the ram 4 is lowered to lower the holder 7 and the net portion 12c of FIG. The shear fragments 12c are discharged from the shear fragment outlet 1a.
When the foot is released from the foot switch 3, the ram 4 rises and the restoring force of the spring 10 returns the holder 7 to the original position.

The processing procedure of the 90 ° V-shaped notch will be described. As shown in FIG. 7, the angle steel material 12 is set horizontally in the mold 2 in FIG. 7, and the vertical side portion 12a of the angle steel material 12 is pressed by the guide surface 13d of the pressing plate 13. At this time, since the lateral side portion 12b of the angle steel material 12 thinner than the dimension B in FIG.
Does not abut, but passes through the lower surface of the stopper 16. Therefore, when setting the position of the angle steel material 12, the stopper 16 does not interfere. In this state, the foot switch 3 is stepped on to perform shearing similarly to corner cutting.

When the end portion of the flat plate 15 is to be sheared into a square shape, the knob bolt 19 is loosened, the stopper 16 is replaced upside down, and the short side portion 16b is placed on the lower side. As shown in FIG. 12, the distance between the receiving blade 11 and the arm 17 is narrower than that of the flat plate 15, and the thin flat plate 15 can be abutted against the stopper 16. As shown in FIG. 10, the positions of the stoppers 16 and 16 are set so that the flat plate 15 abuts the left and right stoppers 16 and 16 with a desired notch length (40 mm in FIG. 11). Shear with.

Further, since the arm 17 has a narrow gap between the arm 17 and the receiving blade 11, the arm 17 is not in operation.
A finger does not enter between the tool and the receiving knife 11, and also serves as a safety guard.

[0018]

According to the present invention, if a stopper is set to a size where a notch is desired, a corner cut can be easily performed only by abutting the end face of the angle steel material against the stopper.
Therefore, there is no need to write a drawing line on the angle steel material or to visually align the drawing line, and the workability is remarkably improved.

Further, since the support member has a narrow space between the support member and the female mold, no fingers are inserted between the support member and the female mold during the work, and it also serves as a safety guard. it can.

Further, it is possible to provide a notcher die which is easy to work and safe without increasing the cost by simply adding inexpensive parts to the conventional die.

[Brief description of drawings]

FIG. 1 is a perspective view of a notcher mold showing an embodiment of the present invention.

FIG. 2 is a perspective view of a shearing machine having a notcher die.

FIG. 3 is an enlarged view around a stopper.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a plan sectional view of a notcher die.

FIG. 6 is a plan view of a notcher die in which an angle steel material is set during corner cutting.

FIG. 7 is a diagram of a processing example of corner cutting.

FIG. 8 is a plan view of a notcher die in which an angle steel material is set during 90 ° V-shaped notching.

FIG. 9 is a diagram showing an example of processing a 90 ° V-shaped notch.

FIG. 10 is a plan view of a notcher mold in which a flat plate is set.

FIG. 11 is an enlarged view around the stopper.

12 is a cross-sectional view taken along line DD of FIG.

FIG. 13 is a plan view of a conventional notcher die in which an angle steel material is set at the time of 90 ° V-shaped notching.

FIG. 14 is a plan view of a conventional notcher die in which an angle steel material is set during corner cutting.

[Explanation of symbols]

2 ... Notcher die, 6 ... Pushing blade, 12 ... Angle steel, 12a ... Vertical side part, 12b ... Horizontal side part, 12c ... Shear fragment, 15 ... Flat plate, 16 ... Stopper, 16a ... Female thread part,
16b ... short side part, 16c ... end face, 17 ... arm (supporting member), 17a ... short side part, 17b ... long side part, 17c ... oblong hole, 17d ... top surface, 18 ... bolt, 19 ... knob bolt,
19a ... screw part, 20 ... scale.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 56-11028 (JP, U) Rikai 51-140287 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B23D 15/06 B23D 23/00 B23D 33/10 B21D 43/00

Claims (4)

(57) [Claims] 1. A male mold having a right-angled blade in a frame, and a female mold facing the male mold and having a right-angled notch, and the male mold is directed toward the female mold by power such as hydraulic pressure. In a shearing machine that moves and shears a steel plate, a lower end of a support member that movably supports a stopper that positions the notch length of the steel plate is positioned at a predetermined distance from the female mold.
Shearing machine arranged to, characterized in that a material positioning device having a fixing means for fixing the position of the stopper to the support member. 2. The fixing means is a knob bolt, the support member is provided with a guide surface for guiding a stopper and an elongated hole in parallel with the guide surface, and a knob bolt for fixing the stopper at an arbitrary position of the supporting member is provided with the elongated hole. The shearing machine according to claim 1, wherein the shearing machine penetrates and is fitted into a stopper. 3. The stopper is provided between the stopper and the female die.
The distance can be freely converted.
The shearing machine according to claim 2. 4. A scale plate showing the distance from the corner of the right-angled blade is arranged at any one of the male type, the female type and the supporting member. The shearing machine according to any one of 3 above.