JPH04284926A - Turret punch press - Google Patents

Abstract

PURPOSE:To prevent the under surface of a sheet from flowing with sliding in contact with the lower turret or the die and to smooth rotate the turret. CONSTITUTION:The rotary axial center O of the lower turret 3 on which the die 12 is mounted is inclined against the top surface of the work table 6. The lower turret 3 is arranged at the punching position P for driving up and down the punching tool 11 mounted at the upper turret 2 so that the most upper part of the top surface is positioned. The work table 6 is to cover the upper surface of the lower turret 3 so that the lower turret 3 is disclosed form the opening set around the punching position P. Only at this opening, the lower turret 3 or the die 12 is made in contact with the metal plate W. The freely rolling ball 23 to smooth feed the sheet W on the work table 6.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a turret punch press in which punches and dies are respectively mounted on upper and lower turrets for processing.

0002

BACKGROUND OF THE INVENTION Conventionally, in a turret punch press, a plate placed on a work table is fed back and forth and left and right on the work table and lower turret by moving a work holder. A large number of free-rotating balls are provided on the upper surface of the work table to facilitate the movement of the plate material.

0003

[Problem to be Solved by the Invention] However, when feeding the plate material or indexing and rotating the turret for mold selection, the bottom surface of the plate material may be exposed to the die installed in the lower turret or the top surface of the lower turret. There is a problem of scratches caused by sliding contact.

[0004] In particular, when the die is a mold for louvering, burring, embossing, etc., it often has a part that protrudes higher than a normal hole-making die, and the rotation of the turret Easy to damage board materials. In addition, in the case of such a mold, due to the sliding contact between the plate material and the mold,
Smooth rotation of the lower turret may be hindered.

[0005] An object of the present invention is to provide a turret punch press which can prevent the lower surface of the plate from being damaged and which can ensure smooth rotation of the turret.

[0006]

[Means for Solving the Problems] The turret punch press of the present invention has a rotary axis of the lower turret on which the die is mounted.
It is inclined with respect to the top surface of the work table. The lower turret is arranged so that the top of the upper surface is located at the punching position where the punching tool is driven up and down.

[0007]

[Operation] According to this structure, the index portion of the lower turret with respect to the punching position is at the uppermost position, and when it leaves the punching position, it sinks into the upper surface of the work table. Therefore, the contact area between the plate material placed on the work table and the lower turret is reduced, or the number of dies that are in contact with the plate material among the dies mounted on the lower turret is reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 2 is a side view of the whole. Upper and lower turrets 2 and 3 are installed on a C-shaped frame 1, and a punch drive mechanism 4, such as a crank type, for driving a punch tool up and down at a punching position P is provided on the upper frame portion of the frame 1. A bed 5 is successively provided in front of the frame 1, and a work table 6 is provided on the bed 5.

The frame 1 is covered with a fuselage cover, and FIG. 1 shows an enlarged view of the removed state. The upper and lower turrets 2 and 3 are rotatably installed in the upper and lower frame parts of the frame 1 via bearings 7 and 8, respectively, and are indexed and rotated in synchronization with each other by an indexing drive device (not shown). I am made to do so. The upper and lower turrets 2 and 3 each have a punch tool 11 and a die 12 mounted in mold mounting holes 9 and 10 that are arranged side by side on the circumference. The punch tool 11 engages with the ram 24 of the punch drive mechanism 4 at the punch position P and is driven up and down. The punch tool 11 and the die 12 are used for forming, such as louver processing, burring, and embossing, in addition to metal fittings for making holes.

The lower turret 3 is inclined with respect to the horizontal upper surface of the work table 6. That is, the rotation axis O of the lower turret 3 is inclined with respect to the vertical axis L by an inclination angle θ. Further, the lower turret 3 is installed so that the top of the upper surface is located at the punching position P due to this inclination. Each mold mounting hole 10 of the lower turret 3 is inclined by the above-mentioned inclination angle θ with respect to the rotation axis O so as to be vertical at the punch position P. The upper surface outer peripheral portion 3a of the lower turret 3 where the mold mounting hole 10 is provided is located at the punch position P.
It is formed into a conical surface so that it is horizontal.

As shown in FIG. 3, the work table 6 includes:
Fixed table 6a in the center and sliding tables 6b on both sides
It consists of. The slide table 6b has a carriage 13
It is also installed on the rail 14 of the bed 5 so that it can be moved back and forth (in the Y-axis direction). A cross slide 15 is mounted on the carriage 13 so as to be movable laterally (in the X-axis direction).
A plurality of work holders 16 that grip the cross slide 1
It is attached to 5. The carriage 13 and cross slide 15 are driven forward and backward by servo motors 19 and 20 via feed screws 17 and 18, respectively. These carriage 13, cross slide 15, work holder 16, and servo motors 19 and 20 constitute a plate feed device 21.

The fixed table 6a of the work table 6 is
Consisting of a rear table 6d located above the lower turret 3 and a front table 6c in front of it, the rear table 6d
is provided with a substantially fan-shaped opening 22 that exposes a portion of the lower turret 3 in the vicinity of the punch position P.

These rear table 6d and front table 6
c and the slide table 6b, a large number of free rotating balls 23 on which the plate material W is placed are provided over the entire surface. These free-rotating balls 23 are arranged so that a part thereof protrudes from the top surface of the table.
Each is rotatably housed in a ball case (not shown). Note that the slide table 6 has an idle ball 23.
Instead, a roll rotatable along the Y-axis direction may be provided.

According to this configuration, the rotation axis O of the lower turret 3 is tilted so that the top of the upper surface of the lower turret 3 is located at the punching position P. sinks below the rear table 6d of the work table 6. Therefore, the contact area between the plate material W on the work table 6 and the lower turret 3 is reduced, and among the dies 12 arranged on the circumference of the lower turret 3,
The number of dies 12 that come into contact with the plate material W is reduced.

Therefore, when the plate material W is fed on the work table 6 or when the upper and lower turrets 2 and 3 are rotated for indexing, the lower surface of the plate material W is prevented from being damaged by contact with the lower turret 3 or the die 12. Ru. Further, even if the die 12 has an upwardly protruding portion like various molds, the plate material W
The lower turret 3 can be smoothly indexed and rotated without being caught by the die 12.

Particularly in this embodiment, since the free-rotating ball 23 is also provided above the lower turret 3, the workpiece can be fed very smoothly and without causing scratches.

If each die 12 is made to protrude beyond the upper surface of the lower turret 3, the problem of sliding contact between the plate material W and the lower turret 3 does not occur, but due to the inclination of the lower turret 3, the contact between the die 12 and the plate material W does not occur. Less contact.

In the above embodiment, a part of the rear table 6d covers the upper part of the lower turret 3, but the upper part of the lower turret 3 may be left open. Further, in the above embodiment, the upper surface of the work table 6 is a horizontal surface, but
It may also be a sloped surface. In that case, the rotation axis of the lower turret 3 is tilted with respect to the tilted upper surface of the work table.

[0019]

Effects of the Invention In the turret punch press of the present invention, the rotational axis of the lower turret is tilted so that the top of the upper surface of the lower turret is located at the punching position. It sinks into the top of the work table. Therefore, the contact area between the plate material on the work table and the lower turret is reduced, or the number of dies that come into contact with the plate material mounted on the lower turret is reduced. Therefore, when feeding a plate on the work table or rotating the upper and lower turrets for indexing, the lower surface of the plate is prevented from being damaged by contact with the lower turret or die, and the lower turret can be rotated for indexing smoothly. There is an effect.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of an embodiment of the present invention.

FIG. 2 is a side view of the entire device.

FIG. 3 is a cutaway plan view thereof.

[Explanation of symbols]

1... Frame, 2... Upper turret, 3... Lower turret, 4...
Punch drive mechanism, 6... Work table, 6a... Fixed table, 6b... Slide table, 11... Punch tool, 1
2...Die, 13...Carriage, 15...Cross slide,
16... Work holder, 22... Opening, 23... Idle ball,
O...Rotation axis, P...Punch position, W...Plate material, θ...Inclination angle

Claims (1)

[Claims] 1. The rotation axis of the lower turret on which the die is mounted is inclined with respect to the upper surface of the work table, and the uppermost part of the upper surface of the lower turret is positioned at a punch position where the punch tool mounted on the upper turret is driven up and down. A turret punch press in which the lower turret is arranged so that the upper part is located.