JP2002066654A - Die holding apparatus for punching machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punching machine at a moderate price which never reduces workability at the time of punching, curtailing an amount for capital investment, and to shorten the time for die changing work by facilitating replacement of the die at the time of making the same diameter hole. SOLUTION: A holding hole 4b is provided in a base 4 of a mold 2 and by providing a cylindrical boss 5a rotatably inserted into the holding hole 4b in a die holder 5, the die holder 5 can be composed so as to be rotated. An optional die 8 is selected by rotating the die holder 5 in accordance with the dimension and the wall thickness of the angle stock 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die holding device for a shear hole making machine for making a hole in a workpiece such as an angle material. Hereinafter, the work material will be described as an angle material.

[0002]

2. Description of the Related Art Generally, a process of shearing and drilling an angle material is performed by a punch (a punch) which is a convex cutter and a die which is a concave cutter facing the punch (hereinafter referred to as a puncher). Drilling is performed by using a mold (hereinafter, this mold is referred to as a puncher mold) and moving the punch toward the die by power such as hydraulic pressure while holding the angle material between the punch and the die.

[0003] To make a hole in an angle material, a punch 9 and a die 8 as shown in FIG. 10 are set in accordance with the target hole diameter and the thickness of the angle material, and the angle material 20 is turned upside down as shown in FIG. It is inserted into an L-shape and machined, that is, drilled as shown in FIG. This processing is based on angle material 20
Since the side that is not perforated faces downward and does not obstruct the view, it is convenient to align the tip of the punch 9 with the scribe line, and the punch 9, the punch holder 10,
There are advantages that there is no danger of interference between the holder 13 and the like and the angle material 20.

Generally, a punch 9 is, as shown in FIG.
It is inserted into the holding hole of the punch holder 10 and is fixed laterally by a set screw 11, and is fixed by a nut 12 so that the set screw 11 is not loosened due to vibration during shearing. The die 8 is inserted into the die holding hole 5b of the die holder 5, is fixed from the lateral direction by a set screw 6 or the like as shown in FIG. Therefore,
The dimensions of the die holding hole 5b and the outer diameter of the die 8 are determined by the maximum hole diameter that can be drilled. The interval between the punch 9 and the die 8 is set to be as narrow as possible in order to shorten the processing time and prevent the finger from being caught. Therefore, the die 8 cannot be replaced unless the punch 9 and the punch holder 10 are removed.

Generally, in the shearing process, an appropriate gap is provided between the male mold and the female mold in order to prevent interference between the male mold and the female mold, and this is called a clearance. Generally, a clearance of about 6 to 10% of the thickness of the angle material is appropriate (because burrs are less generated and the life of the blade is longer).
In the case of drilling a shear hole, shearing occurs on the outer periphery of the punch 9 and the inner periphery of the die 8, so that the difference between the inner diameter of the die 8 and the outer diameter of the punch 9 is twice the appropriate clearance. Therefore,
Generally, the outer diameter of the punch 9 should be the same as the hole diameter to be drilled.
The inner diameter of the die 8 is a dimension obtained by adding a clearance twice as large as the hole diameter. Clearance is angle material 20
About 6 to 10% of the sheet thickness of the angle material 20 is appropriate.
mm and 6 mm, respectively, 0.18 to 0.3 mm, 0.
24-0.4 mm, 0.3-0.5 mm, 0.36-
0.6 mm. Therefore, since the range of the appropriate clearance does not overlap between the plate thickness of 3 mm and the plate thickness of 6 mm, two types of dies 9 are prepared. For example, the thickness of the angle material 20 is 3
~ 4mm (clearance 0.2 ~ 0.3mm) and 5 ~ 6
mm (clearance: 0.4 to 0.5 mm), the inner diameter of the die 9 is determined.

[0006]

The size of the hole formed in the angle member 20 is determined according to the size of the angle member 20 and its use. For example, an angle material having a side of 50 mm is widely used for various types of gantry, frame, work table, pipe and duct support, building framework, and the like, and the hole diameter to be processed is generally about 6 to 20 mm. In contrast,
Angle materials having a side of 30 mm or less have relatively narrow applications such as supporting signboard frames and electric wires, and generally have a hole diameter of about 4 to 11 mm.

[0007] Drilling in the angle member 20 is predominantly performed at the center of one side thereof. However, one side is 50
In the puncher and puncher mold capable of drilling an angle material 20 mm, the A1 dimension in FIG. 13 is determined by the maximum hole diameter and clearance that can be processed, the thickness of the die 8 and the thickness of the die holder 5, and thus the angle material having a plate thickness of 6 mm To 20
In a puncher or puncher mold capable of drilling holes up to 1 mm, the A1 dimension is approximately 15 mm due to its structure, and A1 = (hole diameter 20 + thickness die clearance 0.5
× 2) / 2 + the thickness of the die 2.5 + the thickness of the die holder 2 = 15 When the thickness of the angle material 20 is added, it is impossible to make a hole at the center of the side of the angle material 20 having a side of 30 mm as shown in FIG. Therefore, in order to make a hole in the center of the side of the angle member 20 having a side of 30 mm, as shown in FIG.
Since the thickness of the m-angle member 20 is 3 mm, the A2 dimension is 12 mm.
mm or another puncher or puncher mold is required, and two types of punchers and puncher molds are prepared,
They are properly used depending on the size of the angle material 20, which has caused an increase in capital investment.

The angle member 20 having a side of 50 mm has a plate thickness of 3 to 6 mm, and all of them are used.
Since the clearance varies depending on the thickness of the plate 0, the die 9 for the thin plate and the die 8 for the thick plate have to be used properly, so that the punch 9 must be removed and the die 8 needs to be replaced.

An object of the present invention is to solve the above-mentioned problems of the prior art and provide an inexpensive shear hole drilling machine which does not reduce the workability in shear hole drilling.

Another object of the present invention is to facilitate the exchange of dies and shorten the exchange work time even when the same hole diameter is formed in angle members having different plate thicknesses.

[0011]

The above object is achieved by providing rotating means for rotatably supporting a die holder.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
This will be described with reference to FIG. FIG. 1 is a front view of a puncher mold, and FIG.
Is a partial cross-sectional side view of a puncher mold on which an angle member 20 having a side of 50 mm and a thickness of 6 mm is set, FIG. 3 is a perspective view of a shearing machine, and FIG. 4 has a puncher mold on which the angle member 20 is set. FIG. 5 is a perspective view of a shearing machine, and FIG.
6 is a sectional view taken along line AA of FIG. 7, FIG. 6 is a sectional view taken along line BB of FIG.
9 is a cross-sectional view taken along the line AA of FIG. 1 in a state where the die holder is rotated. FIG. FIG. 4 is a partial cross-sectional side view of a puncher mold in which an angle member 20 having a side of 50 mm and a plate thickness of 3 mm is set by rotating a die holder.

3 and 4, front frames 1a and 1b are attached to the front of an opening of a C-shaped frame 1 so as to be openable and closable. Generally, a frame having this structure is called a portal frame. A mold 2 for making a shear hole in the angle member 20 is provided in an opening of the frame 1, and a rod 1 c for pushing down a movable portion of the mold 2 is provided above the opening, and a foot switch 3 connected to the frame 1 is depressed. The rod 1c is lowered by a hydraulic pump in the frame 1 (not shown). Since such a configuration and operation are well known, further description is omitted.

Next, the configuration of the mold 2 will be described. 1, 2, 5, and 6, a die discharge hole 4 a and a holding hole 4 b are provided in a base 4, and a die holder 5 having a cylindrical boss 5 a rotatably fitted in the holding hole 4 b is provided.
In the die holder 5, a plurality of die holders (in this embodiment, 2 mm for processing an angle material having a side of 50 mm) are held.
Two dies for drilling up to 0mm and 30m on each side
Die holding holes 5b (5ba, 5b) for dies capable of drilling up to 11 mm for machining angle materials of m
b, 5bc) and a chip discharge hole 5c (5ca, 5cb, 5c).
cc) is the position of each die holding hole 5 from the center of the cylindrical boss 5a.
It is provided so that the dimension up to the center of b (dimension B in FIG. 5) is the same. In the die holding hole 5b of the die holder 5, a plurality of dies 8 (in this embodiment, one side is 50 mm
18m that can be drilled up to 20mm for angle material processing
m thick plate die 8a, thin plate die 8b, one side is 30
Drilling up to 11mm for 1mm angle material processing
(Three dies 8c for a 0 mm thin plate).
A set screw 6 for fixing the die 8 is fitted to the die holder 5 so as to be orthogonal to each of the die holding holes 5b, and a nut 7 for preventing loosening is fitted to the set screw 6. On the die 8, a punch 9 is fitted in a holding hole of a punch holder 10 at a predetermined interval, and a set screw 11 for fixing the punch 9 is screw-fitted so as to be orthogonal to the holding hole. A nut 12 for preventing loosening is fitted to the set screw 11. The punch holder 10 is fixed to the holder 13, and two guide shafts 14 that support the holder 13 movably up and down are disposed behind the base 4. A washer 16 is fixed to the upper end of the guide shaft 14 so that the holder 13 does not come off. A spring 15 is provided on the outer periphery of the guide shaft 15 to urge the holder 13 upward so that the holder 13 comes into contact with the washer 16.

As shown in FIGS. 2 and 6, a plurality of cylinder bosses 5a of the die holder 5 are provided at appropriate places on the outer periphery (in this embodiment,
Three counter holes 5d (5da, 5db, 5dc) are provided at a predetermined angle (120 ° in the present embodiment).
A ball 17 which engages with the countersunk hole 5d of the die holder 5 and positions (determines the angle of) the die holder 5 is provided on the base 4.
Is provided so as to be urged by the spring 18 toward the countersink hole 5d. In this state, the die holder 5, the set screw 6, the nut 7, and the die 8 are rotatable in the circumferential direction with respect to the base 4 while maintaining the relative positions. When the ball 17 coincides with the countersunk hole 5d, the spring 18 Ball 1 by
7 enters into the countersink hole 5d, and the rotational load is temporarily increased, and positioning is performed.

As shown in FIG. 1, the base 4 is provided with a screw hole 4c. When the clamp bolt 19 is turned and screwed in, the cylindrical boss 5a of the die holder 5 is pressed by the thrust of the bolt 19, and the die holder 5 is pressed. Is fixed, and the die holder 5 does not move due to the reaction force at the time of setting the angle material 20 or shearing.

In FIG. 1 and FIG. 2, a punch 9 having an outer diameter of 18 mm is attached, and a punch 9 for processing an angle material having a side of 50 mm.
FIG. 8 shows a state in which a punch 8 having an outer diameter of 10 mm is attached, and a die 9 for machining an angle material having a side of 30 mm is shown in FIG.
FIG. 9 shows a state in which a 10 mm thin plate die 8c capable of drilling up to 10 mm is in the front (the A2 dimension in FIG. 5 is 12 mm or less so that a hole can be drilled in the center of the side of the 30 mm angle material). A punch 9 with an outer diameter of 18 mm is attached, and a side of 50 mm is used for machining an angle material having a length of 50 mm.
The figure shows a state in which a die 8b for an 18 mm thin plate that can be drilled up to the front is in the front.

In the above configuration, when an 18 mm hole is drilled in the angle member 20 having a side of 50 mm and a plate thickness of 6 mm, as shown in FIG. 2, the die 2 is set so that the 18 mm thick plate die 8a is set to the front. The angle material 20 is set and processed. Next, when making a 10 mm hole at the center of the side of the angle member 20 having a side of 30 mm and a plate thickness of 3 mm, first loosen the nut 12 and the set screw 11 to 18 mm.
The punch 9 is removed, the 10 mm punch 9 is attached, and the punch 9 is fixed with the set screw 12 and the nut 13. Subsequently, the clamp bolt 19 is loosened and the die holder 5 is rotated in the direction of the arrow as shown in FIG. When the center of the punch 9 and the center of the 10 mm thin plate die 8c coincide with each other, the ball 17 is positioned in the hole 5dc. Turn the clamp bolt 19 to tighten it,
The die holder 5 is fixed. As shown in FIG. 8, one side is 30 m
The angle material 20 of m is set in the mold 2 and processed.

Further, after drilling an 18 mm hole in the angle member 20 having a side of 50 mm and a plate thickness of 6 mm, the side having a side of 50 mm is formed.
When making an 18 mm hole in an angle material 20 having a thickness of 3 mm and a plate thickness of 3 mm, the clamp bolt 19 is loosened without replacing the punch 9, and the die holder 5 is rotated in the opposite direction of FIG. At the position where the center of the punch 9 and the center of the 18 mm thin die 8b coincide with each other, the ball 17 enters the hole 5db and is positioned. By turning the clamp bolt 19, the tightening die holder 5 is fixed. As shown in FIG.
Set and process.

Further, when the base 4 of the puncher mold 2 is fixed to the opening of the frame 1, an integrated shearing machine “puncher” is obtained.

[0021]

According to the present invention, since the die holder is configured to be rotatable, a plurality of dice having different sizes are held by the dice holder and rotated, so that the center of the sides of the angle members having different sizes is formed. Drilling is possible, and it is not necessary to prepare a plurality of punches and punch dies, and a shearing drilling machine can be provided at low cost.

Further, even when the same hole diameter is formed in the angle members having different plate thicknesses, it is possible to perform processing only by rotating the die holder, and the replacement work time can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a puncher mold showing one embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view of a puncher mold set with an angle material having a side of 50 mm and a thickness of 6 mm.

FIG. 3 is a perspective view of a shearing machine.

FIG. 4 is a perspective view of a shearing machine having a puncher mold on which an angle material is set.

FIG. 5 is a sectional view taken along line AA of FIG. 1;

FIG. 6 is a sectional view taken along line BB of FIG. 2;

FIG. 7 is a sectional view taken along the line AA of FIG. 1 in a state where the die holder is rotated.

FIG. 8 is a partial cross-sectional side view of a puncher mold in which an angle material having a side of 30 mm and a thickness of 3 mm is set by rotating a die holder.

FIG. 9 is a partial cross-sectional side view of a puncher die set with an angle material having a side of 50 mm and a plate thickness of 3 mm.

FIG. 10 is a perspective view of a punch and a die.

FIG. 11 is a perspective view showing a processing example of a shear hole drilling process.

FIG. 12 is a front view of a conventional puncher mold.

FIG. 13 is a partial cross-sectional side view of a conventional puncher mold in which an angle member having a side of 50 mm and a thickness of 6 mm is set.

FIG. 14 is a partial cross-sectional side view of a conventional puncher mold in which an angle material having a side of 30 mm and a thickness of 3 mm is set.

FIG. 15 is a partial cross-sectional side view of another conventional puncher mold in which an angle material having a side of 30 mm and a thickness of 3 mm is set.

[Explanation of symbols]

1 is a frame, 2 is a mold, 4 is a base, 4a is a chip discharging hole, 4b is a holding hole, 4c is a screw hole, 5 is a die holder, 5a is a cylindrical boss, 5b is a die holding hole, 5d is a countersunk hole, 8 is a die, 9 is a punch, 17 is a ball, 18 is a spring, 19 is a clamp bolt, and 20 is an angle material.

Claims (6)

[Claims] 1. A hydraulic apparatus comprising: a male die having a punch as a convex blade; and a female die having a dice as a concave blade, and a female die having a die holder for holding the die. A shearing hole drilling machine for shearing a workpiece by moving the male die by the power of the die, etc., wherein a rotating means for rotatably supporting the die holder is provided, wherein a die holding device of the shearing hole drilling machine is provided. . 2. The method according to claim 1, wherein the die holder includes a plurality of die holders corresponding to the plurality of dies, and positioning means for aligning one of the plurality of dies with the center of the punch. A die holding device for a shear hole drilling machine according to claim 1. 3. A die holding device for a shear hole making machine according to claim 1, further comprising fixing means for fixing the rotation of said die holder. 4. A die according to claim 1, wherein said rotating means comprises a holding hole provided in said base and a cylindrical boss projecting from said die holder and fitted into said holding hole. Holding device. 5. A positioning device comprising: a plurality of holes having a predetermined angle provided at appropriate positions on a circumference of a die holder; a ball provided on a base corresponding to one of the holes; 3. A die holding device for a shear hole drilling machine according to claim 1, wherein the spring is pressed against a boss. 6. A die holding device for a shearing hole drilling machine according to claim 1, wherein said fixing means is constituted by a screw hole provided in said base and a clamp bolt provided in said screw hole.