JPH0239625Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a punching device for punching a workpiece such as an aluminum profile.

Conventional technology To punch out the end of a workpiece, such as an aluminum profile, a die and a punch are arranged in the punching section, and the punch is moved toward the die by the slide of the press. It is being processed.

Problems that the invention aims to solve: Since the punch has a one-piece structure and the entire punch is moved toward the die at the same time by the slide of the press, the cutting edge of the punch is provided with a shear angle so that the cutting edge is aligned in the longitudinal direction. The punching force, that is, the pushing force of the slide, is reduced by sequentially contacting the workpiece and punching the workpiece sequentially.However, when the workpiece has a long punched part, increasing the shear angle of the punch reduces the punch stroke. becomes longer, the slide stroke of the press also becomes longer, and the shape of the die also needs to be changed according to the stroke of the punch. Since the corner cannot be made too large, the punching force will increase.

For example, as shown in FIG. 5, an upper connecting wall 2 of an aluminum profile 7 having a cross-sectional shape having upper and lower openings 4, 5 and a hollow portion 6 formed by side walls 1, 1 and upper and lower connecting walls 2, 3. When punching the end of the aluminum to a predetermined length, the die 8 is inserted into the hollow part 6, so there is a limit to the thickness of the die 8 in the stroke direction of the punch 9. Since it is regulated by the shape of the profile, the shear angle cannot be made large and the punching force becomes large, and the outer surfaces of the side walls 1, 1 may have white streaks or be deformed.

[Means and actions for solving the problem]

A plurality of punch holders each having a vertical hole having an upward cam surface and a downward cam surface are arranged in parallel so as to be slidable along the horizontal hole of the main body, and each punch holder is provided with a punch facing in the sliding direction. , a plurality of vertically elongated cams each having a downward cam surface and an upward cam surface inserted into the vertical hole of the punch holder are mounted on the punch plate;
This is a punch device in which the upward cam surfaces are sequentially shifted in the vertical direction, and when the punch plate is pressed down by the press head, the downward cam surfaces of the plurality of cams are aligned with the upward cam surfaces of the plurality of punch holders. A plurality of punch holders can be sequentially slid by a predetermined stroke in sequential contact with the punch holder.

Embodiment FIG. 2 is a longitudinal cross-sectional view of the whole, in which first and second support stands 11 and 12 are detachably attached to a base 10, and the upper surfaces of the first and second support stands 11 and 12 are A workpiece, for example, an aluminum profile 13 is placed, and this aluminum profile 13 has both side walls 14 and 15.
and the first and second connecting walls 16 and 17 form a long member with a cross-sectional shape having openings 18 and 19 on one side and the other side and a hollow portion 20, and one side wall 14 serves as the first and second support bases. The openings 18 and 19 on one side and the other side are opened toward the left and right sides.

The upper surface 11 of the first and second support stands 11 and 12
12a and 12a have a stepped shape so that even an aluminum profile having a protrusion or a recess on one side wall 14 can be placed horizontally.

A punching device 21 is disposed adjacent to the base 10, and this punching device 21 has first to fourth punch holders 23 ₁ to 23 ₄ provided on a main body 22 so as to be slidable left and right. 1st to 4th punch 24
₁ to 24 ₄ are fixed to each other, and each punch holder is slid from side to side by the first to fourth cams 25 ₁ to 25 ₄ fixed to the punch plate 25, and the main body 22 and the base 10 are is fixed to the bed of the press (not shown), and the punch plate 25
The press head 26 is located above the aluminum section 13, and the first to fourth punches ₂₄₁ to ₂₄₄ face the concave portion 18 on one side of the aluminum section 13.

A die 27 is provided in the hollow part 20 of the aluminum profile 13.
is inserted, the liner 28 faces the other side recess 19, and the die 27 and liner 28 are connected to the fixed guide 29.
The fixed guide 29 is connected to the recess 1 of the base 10 to constitute the die device 30.
It is fitted and supported at 0a.

As shown in FIG. 1, the punch device 21 has first to fourth punch holders 23 1 to 23 4 fitted into horizontal holes 22 a of the main body 22 so as to be slidable left and right, and the first to fourth punch holders 23 ₁ to 23 ₄ are fitted into each punch holder. Four punches 24 ₁ to 24 ₄ are detachably fixed with bolts or the like, and each punch has a large shear angle α, for example ⁸⁰ , and is located at the same position in the left-right direction.

The first to fourth cams 25 ₁ to 25 ₄ are rod-shaped bodies with a rectangular cross section, and are bent into a substantially crank shape at the intermediate portion to form a downward cam surface 31 and an upward cam surface 32 . The upward and downward cam surfaces 31 and 32 are sequentially positioned by the length of the cam surface such that the first cam 25 ₁ is at the bottom and the fourth cam 25 ₄ is at the _top. ~25 It is shifted in the direction of movement of ₄ .

The first to fourth punch holders 23 ₁ to 23 ₄ have vertical holes 33 through which the first to fourth cams 25 ₁ to 25 ₄ are inserted.
are formed at the top and bottom of this vertical hole 33, respectively, and an upward cam surface 34 with which the downward cam surface 31 engages and a downward cam surface 35 with which the upward cam surface 32 engages are formed. When the cam is moved up and down, each punch holder slides left and right.

When the press head 26 is moved downward from the state shown in FIG. 2, it presses the punch plate 25, and thereby the first to fourth cams ₂₅₁ to ₂₅₄
descends, and the downward cam surface 31 of the first cam 25 ₁ engages with the upward cam surface 34 of the first punch holder 23 ₁ to slide the first punch holder 23 ₁ toward the die 27. Aluminum profile 13 with first punch 24 ₁
A portion near the end of the first connecting wall 16 is punched out.

Then, as shown in FIG. 4a, the first punch 24
When the punch ₁ slides to the stroke end and the punching process is completed, the cutting edge A of the first punch 24 ₁ becomes substantially continuous with the cutting edge B of the second punch 24 ₂ , and at the same time, the downward cam surface of the second cam 25 ₂ 31 is the second punch holder 2
The second punch holder ₂₃₂ slides by engaging with the upward cam surface 34 of the second punch 242, and the second punch holder ₂₃₂ engages with the upward cam surface ₃₄ of
Punch 24 Sequentially punch out parts that are continuous with the part punched out with ₁ .

As shown in FIGS. 4b and 4c, punching is subsequently performed successively using the third punch 24 ₃ and the fourth punch 24 ₄ in the same manner. When the press head 26 returns, the first to fourth cams 25 ₁ to 25 ₄ are returned to their original positions by compression springs (not shown) which urge the punch plate 25.

Because of this, during one stroke of _the head press ₂₆ , _the first connecting wall of the aluminum section ₁₃ is 16 can be successively cut to a predetermined length, the stroke of one punch can be short, and the shear angle α can be increased.
Not only can the punching force be reduced, but also the punching part can be made longer even when the punch stroke is restricted by the shape of the aluminum shape, which prevents white lines from appearing on both sides of the aluminum shape or deformation. In addition, the length of the punched portion can be arbitrarily changed by increasing or decreasing the slide stroke and the number of punches.

In addition, since punching is performed by moving the punch laterally, the waste escapes immediately downward and does not hit the punch or die, and the punch is actuated by the stroke of the cam surface, resulting in damage to the punch or die. This prevents the scattering of dirt and debris.

In the above embodiments, punching of aluminum shapes was described, but the present invention can also be applied to flat plates.

Furthermore, the shapes of the cam and the punch holder are not limited to those described above; the cam surfaces of the cams may be in the same position, and the cam surfaces of the punch holder may be shifted in the cam movement direction, and the length and angle of the cam surface of the cam may be 1st
The cam 25 ₁ may be the smallest and the fourth cam 25 ₄ may be the largest, or the cam surface may be formed on the punch without using a punch holder.

[Effect of idea]

Since the positions of the downward cam surfaces 31 and upward cam surfaces 32 of the plurality of cams inserted into the vertical holes 33 of the plurality of punch holders are sequentially shifted in the vertical direction, the punch plate 25 is pushed down to simultaneously push down the plurality of cams. As a result, the downward cam surface 31 of one cam sequentially contacts the upward cam surface 34 of one punch holder, and the plurality of punch holders sequentially slide by a predetermined stroke along the horizontal hole 22a of the main body 22, thereby Since multiple adjacent punches sequentially move in the same direction by a predetermined stroke, the punches can punch out the workpiece one after another, increasing the shear angle of the punch and reducing the stroke of the punch. This reduces the punching force and prevents white streaks or deformation on both sides of the workpiece, and even when the punch stroke is restricted due to the shape of the workpiece, it can be used for long sections. Not only can it be punched, but punch plate 2
Since it is sufficient to press down the press head 5 with one press head, there is no need to operate a plurality of press heads in sequence, and the structure and operation control of the press head becomes simple.

[Brief explanation of the drawing]

1 to 4 show embodiments of the present invention.
The figure is a perspective view of the punching device, Figure 2 is an overall sectional view,
Figure 3 is a plan view with the aluminum profile removed, Figure 4
The figure is an explanatory diagram of the punching operation, and FIG. 5 is a sectional view of a conventional example. 22 is a main body, 23 ₁ to 23 ₄ are first to fourth punch holders, 24 ₁ to 24 ₄ are first to fourth punches, 25
₁ to 25 ₄ are the first to fourth cams.

Claims (1)

[Claims for Utility Model Registration] A plurality of punch holders are slidably arranged in parallel along the horizontal hole 22a of the main body 22, and a punch is attached to each of the punch holders so as to face in the sliding direction, and each of the punch holders A vertical hole 33 having an upward cam surface 34 and a downward cam surface 35 is formed in each of the vertical holes 33, and the downward cam surface 31 and the upward cam surface are inserted into the vertical holes 33 and bent into a substantially crank shape. 3. A punch device characterized in that a plurality of cams having a diameter of 32 are attached to a punch plate 25, with their downward cam surfaces 31 and upward cam surfaces 32 sequentially shifted in the vertical direction.