JP2001300646A - Punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continue working of a work so as to improve the working efficiency of the work by easily discharging a slug in flat-pressing for burr prevention. SOLUTION: A press has an upper punch P and a lower punch 41, a slug discharge hole 31 is formed near a die D in which the lower punch is built in, a slug pusher 20 is arranged at the side opposite to the slug discharge hole 31 for the die D.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch press and, more particularly, to a punch press capable of easily discharging scraps formed during flat pressing for preventing burrs.

[0002]

2. Description of the Related Art As shown in FIG. 5, for example, a conventional punch press has a die composed of a punch P and a die D. The punch P is mounted on an upper holder 96 and the die D is mounted on a lower holder 97, respectively. Further, a ram cylinder 92 is provided above the punch P.

[0003] With this configuration, when the punch P is pressed by the ram cylinder 92, the punch P descends, and in cooperation with the die D, the work W held by the clamp 93 is punched, for example.

[0004] The punched waste W1 that has been punched out falls naturally through the die D and is collected in a provided punched waste bucket or the like.

[0005]

[Problems to be solved by the invention]

However, in the punching method shown in FIG. 5, burrs are generated on the work W.

In order to perform flat pressing to prevent the generation of burrs, a punch 91 is incorporated in a die D as shown in FIG. 6, for example.

That is, in addition to the conventional upper punch P, that is, the upper punch P, the lower punch 91 is provided, and the lower punch 91 is operated by the lower punch cylinder 94.

With this configuration, flat pressing is performed, and as shown in FIG. 6, if the upper punch P and the lower punch 91 are lowered, the scrap W1 generated during the flat pressing is removed from the workpiece W. Separated.

However, this scrap W1 is not
1 is obstructed and cannot fall naturally but remains.

As a result, it is apparent that the subsequent processing of the workpiece W cannot be continued and the processing efficiency is reduced.

SUMMARY OF THE INVENTION An object of the present invention is to easily discharge a scrap in a flat pressing process for preventing burrs, thereby continuing processing of a work and improving the processing efficiency of the work.

[0013]

In order to solve the above-mentioned problems, the present invention has an upper punch P and a lower punch 41 as shown in FIGS. A punch press means is provided in which a cut waste discharge hole 31 is formed in the vicinity of D, and a cut cusp pusher 20 is provided on the opposite side of the die D from the cut waste discharge hole 31.

Therefore, according to the structure of the present invention, the upper punch P and the lower punch 41 are lowered after flattening to return the cut waste W1 portion to flatness and complete the shearing (steps 104 and 104 in FIG. 4). (D) With the scrap W1 separated from the workpiece W, the upper punch P and the upper plate retainer 72 are raised (Step 105 in FIG. 4, FIG. 4E) and the lower plate retainer 42 is lowered. In this case, the scrap W1 remains on the lower punch 41 (step 106 in FIG.
(F)) For example, when the servo cylinder 22 (FIG. 1) is operated, the punching cusp pusher 20 moves forward to push out the punching waste W1 remaining on the lower punch 41 (FIG. 4).
Step 107, FIG. 4 (G)), the scrap W1 hits the front scrap stopper 32, and the scrap waste hole 3
It falls naturally through 1 and is discharged.

For this reason, it is possible to easily discharge the scrap W1 in the flat pressing for preventing burrs, and to continue the processing of the work W, thereby improving the processing efficiency of the work W. it can.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described by way of embodiments with reference to the accompanying drawings. FIG. 1 is an overall view showing an embodiment of the present invention.

The punch press shown in FIG. 1 is, for example, a turret punch press. The turret punch press has an upper turret 6 constituting an upper holder and a lower turret 7 constituting a lower holder. The lower turret 7 has a plurality of upper punches P, dies D and lower punches 41 incorporated therein.

As shown, chains 4 and 5 are wound around the rotation shaft 8 of the upper turret 6 and the rotation shaft 9 of the lower turret 7, respectively.
Is wound around the drive shaft 3.

With this configuration, when the drive shaft 3 is rotated by operating the motor M and the chains 4 and 5 are circulated, the upper turret 6 and the lower turret 7 rotate synchronously, and the upper punch P and the die D And a die comprising the lower punch 41 at the processing position K.

Upper punch P mounted on upper turret 6
Are stored in the upper plate retainer 72.

The upper plate retainer 72 has a function of pressing the work W from above during processing (FIG. 4B), a function of guiding the upper punch P, and a function of guiding the upper punch P.
As described above, it has a function as a holder for storing the upper punch P.

The upper punch P at the processing position K and the upper plate 1 directly above the upper plate presser 72, and the upper frame 1 (FIG. 1) includes an upper punch cylinder 60 and an upper plate presser cylinder 63.
Are provided respectively.

The die D mounted on the lower turret 7 is housed in a die holder 30, and the die D is provided with a lower punch 41.
Is incorporated.

The lower punch 41 (FIG. 3) includes a lower plate retainer 42.
The lower punch head 40 is urged downward through a spring 40A in the lower plate retainer 42.
, A lower punch cylinder 50 is provided on the lower frame 18.

The lower plate retainer 42 includes a spring 43A.
The lower frame 18 is provided with a lower plate pressing cylinder 53 immediately below the lower plate pressing head 43 via the lower frame 18.

The lower plate retainer 42 has a function of pressing the work W from below (FIG. 4A) at the time of machining and a function of guiding the lower punch 41 (FIG. 4C). Further, as described above, it has a function as a holder for accommodating the lower punch 41.

With this configuration, the upper turret 6 and the lower turret 7 are rotated so that the upper punch P,
The die D and the lower punch 41 are selected, and the upper punch cylinder 60, the upper plate holding cylinder 63, the lower punch cylinder 5
By actuating the lower plate holding cylinder 53 with 0, for example, flat pressing, which will be described later, is performed (FIG. 4A).
(D)).

In the vicinity of the die D in which the lower punch 41 is incorporated, a cut-out discharge hole 31 is formed in the lower turret 7.

For example, on the side of the die holder 30 in which the die D is stored (FIG. 2), the lower turret 7
A scrap discharge hole 31 is formed.

A scrap stopper 32 is provided around the scrap discharge hole 31. When the scrap W1 is pushed out by the scraper pusher 20 described later (FIG. 4 (G)), the stopper 32 is attached to the stopper 32. The end is guided to the discharge hole 31.

Below the scrap discharge hole 31,
A shielding plate 34 (FIGS. 1 and 3) is provided on the lower frame 18, and a duct 33 is provided below the shielding plate 34.

On the other hand, with respect to the die D in which the lower punch 41 is incorporated, a punching cusp pusher 20 is provided on the side opposite to the punching drainage hole 31.

The piercing cusp pusher 20 is connected to, for example, the tip of a piston rod 21 of a servo cylinder 22.

The servo cylinder 22 (FIGS. 1 to 3) is mounted on the lower frame 18 via a bracket 23 (FIGS. 1 and 3), and stands upright at substantially the same position as the lower surface of the table 10 described later. I have.

With this configuration, the scrap W1 separated from the work W after the flat pressing is removed (see FIG.
1 (FIG. 4 (F)), the servo cylinder 2
2 is operated to advance the punching cusp pusher 20 (FIG. 4 (G)), the punching waste W1 on the lower punch 41 is pushed out.

Thus, the extruded scrap W1 is extruded.
Is guided to the scrap discharge hole 31 by hitting the scrap stopper 32 (FIG. 1), passes through the shielding plate 34 on the lower frame 18 and the duct 33, and is collected in, for example, a scrap bucket.

Therefore, according to the present invention, it is possible to easily discharge the cut waste W1 by natural fall in flat pressing for preventing burrs.
Can be continued, and the processing efficiency of the work W is improved.

The driving source of the piercing cusp pusher 20 may be a pneumatic or hydraulic cylinder instead of the servo cylinder 22.

The workpiece W from which the scrap W1 is sheared is gripped by a clamp 13 (FIG. 1) during processing, and the clamp 13 is attached to the carriage 12.

The carriage 12 has an X-axis guide rail 16
The ball screw 15 of the X-axis motor Mx is screwed into the carriage 12 through the carriage base 11.

The carriage base 11 is slidably coupled to a Y-axis guide rail 17 on a lower frame 18, and a ball screw 14 of a Y-axis motor My is screwed to the carriage base 11. .

With this configuration, when the Y-axis motor My and the Y-axis motor My are operated, the carriage 12 moves on the carriage base 11 in the X-axis direction, and the carriage base 11 moves in the Y-axis direction. The Y-axis direction gripped by the clamp 13 attached to the carriage 12 can be positioned at the processing position K, for example, flat pressing is performed (FIG. 4).

The operation of the present invention having the above configuration will be described below with reference to FIG.

(1) Operation until the scrap W1 is separated from the work W.

In step 101 of FIG. 4, the lower plate holder 42 is raised and brought into contact with the work W, and
In step 2, the upper plate retainer 72 is lowered to hold the work W, and in step 103, the lower punch 41 is raised and half shearing is performed. Separate W1.

That is, when the work W is carried into the turret punch press (FIG. 1), the work W is gripped by the clamp 13 and the X-axis motor Mx and the Y-axis motor My are operated.
The work W is positioned at a processing position.

In this state, first, as shown in FIG. 4A, the lower plate presser cylinder 53 (FIGS. 1 and 3) is operated to raise the lower plate presser 42 and bring it into contact with the work W. Then, as shown in FIG. 4B, the upper plate pressing cylinder 63 (FIG. 1) is operated to lower the upper plate pressing 72, thereby holding the work W.

In this state, when the lower punch cylinder 50 is operated (FIGS. 1 and 3), the lower punch 41 rises to move the work W from below to the upper punch P side as shown in FIG. , Half-shear processing is performed,
Is formed.

Next, as shown in FIG. 4 (D), when the upper punch P is lowered by operating the upper punch cylinder 60 (FIG. 1), the scrap W1 is returned to the original flat state, and the shear is reduced. When the process is completed and the upper punch P is further lowered and the lower punch 41 is lowered, the scrap W1 is separated from the work W as illustrated.

(2) Operation until the scrap W1 is left on the lower punch 41.

In step 105 of FIG. 4, the upper punch P and the lower punch 41 are raised, and in step 106, the lower plate holder 42 is lowered, and the scrap W 1 is left on the lower punch 41.

When the upper punch cylinder 60 and the upper plate holding cylinder 63 (FIG. 1) are actuated in a state where the scrap W1 is separated from the work W (FIG. 4D), FIG.
As shown in FIG. 4, when the upper punch P and the upper plate retainer 72 are lifted to release the cutting waste W1 and the upper surface of the work W, and the lower plate retainer cylinder 53 (FIGS. 1 and 3) is operated, FIG.
As shown in (F), the lower plate retainer 42 descends, and the lower surface of the work W is released.

Therefore, only the scrap W1 is the lower punch 41.
Left on.

(3) Discharging operation of the scrap W1.

At step 107 in FIG. 4, the punching cusp pusher 20 is advanced to push out the punching waste W1, and at step 108, the punching cusp pusher 20 is retracted and returned to the original position.

That is, when the servo cylinder 22 is operated in a state where the scrap W1 is left on the lower punch 41,
As shown in FIG. 4 (G), since the punching cusp pusher 20 advances toward the lower punch 41, the punching waste W1 remaining on the lower punch 41 is pushed out by the pressing force of the pusher 20.

Then, the pushed-out scrap W1 is guided to the scrap ejection holes 31 (FIGS. 1 to 3) by hitting the scrap stopper 32 in front of the scraps W1.
1, fall naturally, and are collected via a shielding plate 34 and a duct 33 in, for example, a scrap bucket.

Thereafter, when the servo cylinder 22 is operated again, as shown in FIG.
Retreats and returns.

In this state, the X-axis motor Mx (FIG. 1) and the Y-axis motor Mx
The work W is moved by operating the shaft motor My, and the process returns to the step 101 to repeat the same operation to continue the processing of the work W.

[0061]

As described above, according to the present invention, in a punch press having an upper punch and a lower punch, a scrap discharge hole is formed in the vicinity of a die into which the lower punch is incorporated, and the scrap is formed with respect to the die. By forming a punching cusp pusher on the side opposite to the discharge hole, the flattening process returns the scraped portion to flat and after completing the shearing, lowers the upper punch and lower punch and separates the scraped from the work When the upper punch and the upper plate retainer are raised and the lower plate retainer is lowered in this state, the scum remains on the lower punch.For example, when the servo cylinder is operated, the punch pus pusher moves forward and the lower punch By pushing out the above-mentioned scraps left above, the scraps hit the front scraper stopper, fall naturally through the scrap-discharge hole, and are discharged.

For this reason, it is possible to easily discharge the scum in flat pressing for preventing burrs, and the work W
Can be continued, and the technical effect of improving the processing efficiency of the work W can be obtained.

Further, according to the present invention, by providing a mechanically-extracted-screw discharge mechanism, ie, an excavated-screw discharge hole and an extracted cusp pusher, the extracted scum is not caught in the middle of discharge. Since it is driven by the servo cylinder, there is also an effect that high-speed response is possible.

[0064]

[Brief description of the drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a swarf discharge hole 31 and a die D which constitute the present invention.
FIG. 4 is a diagram illustrating a relationship between a lower punch 41 and a punching cusp pusher 20.

FIG. 3 is a detailed view of a lower punch 41, a cut-out discharge hole 31, and a cut-off cusp pusher 20 that constitute the present invention.

FIG. 4 is a diagram illustrating the operation of the present invention.

FIG. 5 is an explanatory diagram of a configuration of a conventional technique.

FIG. 6 is an explanatory diagram of a problem in the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper frame 3 Drive shaft 4, 5 Chain 6 Upper turret 7 Lower turret 8, 9 Rotation axis 10 Table 11 Carriage base 12 Carriage 13 Clamp 14, 15 Ball screw 16 X-axis guide rail 17 Y-axis guide rail 18 Lower frame REFERENCE SIGNS LIST 20 piercing cusp pusher 21 piston rod 22 servo cylinder 23 bracket 30 die holder 31 evacuated scum discharge hole 32 evacuated scab stopper 33 duct 34 shielding plate 40 lower punch head 41 lower punch 42 lower plate pressing 43 lower plate pressing head 50 lower punch cylinder 53 lower plate pressing Cylinder 60 Upper punch cylinder 63 Upper plate holding cylinder 72 Upper plate holding D Die P Upper punch W Work W1 Cutting waste

Claims (3)

[Claims] 1. A punch having an upper punch and a lower punch, a cutout discharge hole formed near a die into which the lower punch is incorporated, and a cutout pusher provided on a side of the die opposite to the cutout discharge hole. A punch press characterized by the following. 2. The punch press according to claim 1, wherein said punching cusp pusher is mounted on a cylinder. 3. The punch press according to claim 1, wherein a scrap stopper is provided around the scrap discharge hole.