JPH0747198Y2 - Work table device for press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a work table device of a press machine, and more particularly to a work table machine by moving a plate material to a press working part. The present invention relates to a work table device used in a press device of a type that presses a plate material at a predetermined position.

(Prior Art) A turret punch press of NC control type, etc. grips a plate material to be processed on a work table by a work clamp means,
By moving this plate material to a press working portion (press working position) by a punch and a die attached to the upper turret and the lower turret, punch press working is performed at a predetermined position of the work plate material. There is.

In the above-mentioned pressing device, when the plate material to be processed moves relative to the press working part, the back surface of the plate material to be processed is scratched by the contact between the plate material and the die (die) arranged on the lower turret. May be attached.

For this reason, conventionally, a work plate material on the work table is supported by an air type free bearing, a protective sheet is hung on the work table itself, and a urethane roller that is vertically moved by a fluid pressure cylinder device is provided in front of the lower turret. It is considered to dispose and support the plate material by this.

(Problems to be solved by the invention) In the case of an air type free bearing, it is possible to avoid scratches on the back surface of the plate material to be processed, that is, back scratches due to contact with the mold, but the free bearing itself moves up and down. However, when the plate material to be processed is scratched by a press, and the air-type free bearing consumes a large amount of air and causes clogging at the air outlet, There is a possibility that the processed plate material may not be properly supported and the effect of preventing back scratches may not be obtained. When a sheet is hung on the work table, the sheet is worn due to contact between the sheet and the workpiece, and durability remains a problem.

In the case of urethane roll, back scratches and dent scratches are prevented, and there is no problem in durability. However, since the urethane roll is moved up and down by a fluid pressure cylinder, it has followability to the press. However, since the plate material to be processed is supported by one urethane roll, the plate material supporting range is extremely narrow.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide an improved work table device of a press device capable of reliably preventing the occurrence of back scratches and dent scratches without causing other troubles. There is.

[Means for Solving the Problems] (Means for Solving the Problems) In view of the conventional problems as described above, the present invention provides a work table device for supporting a plate material to be processed by a punch and a die provided in a pressing device. In a press ram provided with a work table provided so as to be vertically movable in the vicinity of a press working portion by the punch and the die, a table vertical drive means for vertically moving the work table, and a striker for pressing the punch. And a synchronizing means for synchronizing the vertical movement of the press ram vertical drive means and the vertical movement of the table vertical drive means provided in the press device for vertically moving the When moving and positioning the plate material to be processed, the work table is moved upward in synchronization with the upward movement of the press ram to move the workpiece from the die. It is made of a lifting arrangement of Engineering plate.

(Operation) According to the configuration as described above, the work table is moved in the vertical direction in synchronization with the vertical movement of the press ram, so that the plate material to be processed in the vicinity of the press working portion is moved during the movement on the work table. It is prevented from being lifted and coming into contact with the mold, and during the pressing operation, the lifting is released and brought to a predetermined pressing position where it comes into contact with the upper surface of the mold.

Embodiment An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 5 shows a turret type punch press equipped with a work table device according to the present invention, and FIG. 6 shows the work table portion thereof. The turret type punch press has a gate type frame 1, and an upper turret 3 to which a plurality of punches (not shown) are attached and a lower turret 5 to which a plurality of dies (not shown) are attached to the frame 1, respectively. They are rotatably mounted concentrically with each other.

The frame 1 is provided with a ram drive shaft 7 and a ram 9 that is vertically moved by rotation of the ram drive shaft 7.
A striker 11 for pressing a punch (not shown) provided on the upper turret 3 is attached to the. In the turret type punch press, the striker 11 punches the upper turret 3 at a position corresponding thereto (not shown).
The punch is pressed by the punch and a die (not shown) of the lower turret 5 by pressing. Therefore, the center line of the striker 11 is the press center Cp, and this part is the press working portion (press working position).

The frame 1 has a fixed center work table 13 and
Guide rails arranged on both sides of the center work table 13
Movable side work table 17 and fixed rear work table 19 that can be reciprocated in the left-right direction as guided by 15.
And a press working portion, that is, an auxiliary work table 21 that is provided around the lower turret 5 and adjacent to the lower turret 5 so as to be movable up and down.

A carriage 23 is connected to the side work table 17, and a work clamp device 25 that grips a plate material to be processed is provided on the carriage 23 so as to be movable in a direction orthogonal to the paper surface, that is, a so-called loose X-axis direction.

The work table according to the present invention, in this embodiment,
It is the auxiliary work table 21, and the support structure of the auxiliary work table 21 is well shown in FIGS. 1 to 4.

The auxiliary work table 21 is pivotally connected to a drive link element 31 by a pivot 29 by a bracket 27 attached to the back surface thereof, and the drive link element 31 is pivotally connected to an eccentric cam 35 attached to the drive shaft 33. . The drive shaft 33 has a pivot 37 at one end.
Is engaged with the intermediate portion of the swing lever 41 pivotally supported by the frame 1 via the bracket 39, and is rotatably supported thereby. The oscillating lever 41 engages with the engaging element 49 attached to the tip of the piston rod 47 of the repositioning fluid pressure cylinder device 45 by the engaging roller 43 at the other end, and in response to the vertical movement of the piston rod 47. It swings between a normal position as shown around the pivot 37 and a lowered position which is rotationally displaced downward from the normal position.

On the back surface of the auxiliary work table 21, a guide sleeve 53 fitted to a guide post 51 standing upright from the frame 1 is attached. By the engagement of the guide sleeve 53 and the guide post 51, the auxiliary work table 21 moves in parallel in the vertical direction in the figure in accordance with the rotation of the eccentric cam 35 while being guided by these, and the swing lever 41 is moved. When in the normal position, as shown in the figure, it is adapted to move in parallel between a normal position aligned with the pass line PL and a raised position higher than the normal position. A compression coil spring 55 is attached around the guide post 51, and the compression coil spring 55 urges the auxiliary work table 21 upward in the drawing.

A timing belt pulley 57 is attached to the drive shaft 33, and an endless timing belt 59 is engaged with the timing belt pulley 57 as shown in FIG. Timing belt 59 is timing belt pulley 57 and frame 1
It is hung around the timing belt pulley 61 mounted on. The timing belt pulley 61 is drivingly connected to the ram drive shaft 7 in a synchronous state by timing belt type transmission devices 63 and 65.

According to the above-described structure, the ram 9 is vertically moved by the rotation of the ram drive shaft 7, and the rotation of the ram drive shaft 7 is controlled by the timing belt type transmission devices 65 and 63 and the timing belt pulley.
61, the timing belt 59, and the timing belt pulley 57 are transmitted to the drive shaft 33, so that the drive shaft 33 rotates in synchronization with the rotation of the ram drive shaft 7, in other words, in synchronization with the vertical movement of the ram 9. become. The rotation of the drive shaft 33 rotates the eccentric cam 35, and the rotation of the eccentric cam 35 causes the drive link element 31 to move up and down. As a result, the auxiliary work table 21 moves up and down in synchronization with the vertical movement of the ram 9 as the eccentric cam 35 rotates while being guided by the guide post 51.

As a result, when the ram 9 and the striker 11 are in the raised position, the auxiliary work table 21 is in the state as shown in the drawing,
That is, it moves upward in the drawing from the normal position aligned with the pass line PL, so that the plate material (not shown) on the auxiliary work table 21 is lifted from the pass line position. As a result, even if the workpiece 23 is moved on the work table by the carriage 23 and the work clamp device 25 in this state, the back surface thereof does not contact the die on the lower turret 5, and the workpiece is scratched by the die. You will be able to move without being disturbed. The lifting amount may be about 1 to 3 mm.

When the ram 9 and the striker 11 are lowered due to the punch press, the auxiliary work table 21 is lowered to the original normal position accordingly, so that the plate material on the auxiliary work table 21 is moved to the lower turret 5 at the pass line position. It is placed on the upper die, and punch press is performed in this state. As a result, it is possible to prevent the plate material to be processed from being dented.

As described above, when the plate material to be processed is moved, the auxiliary work table 21 rises from the normal position aligned with the pass line PL to prevent back scratches from occurring on the plate material to be processed. 25 is an auxiliary work table
If you try to get above 21, the two will interfere with each other. From this, in this embodiment, when the work clamp device 25 is about to be positioned on the auxiliary work table 21, the repositioning fluid pressure cylinder device 45 causes the swing lever 41 to move to the normal position about the pivot shaft 37. As shown in FIG. 2, it can be rotated clockwise by a predetermined angle, for example, about 2 °. This swing lever
By the rotation of 41, the support position of the drive shaft 33 is displaced downward in the figure, and accordingly, the auxiliary work table 21 is also displaced downward. This displacement amount may be about 6 mm.

As a result, even if the auxiliary work table 21 is brought to the raised position by the eccentric cam 35, the auxiliary work table 21 comes to be positioned below the normal position aligned with the pass line PL, and the auxiliary work table 21 and the work clamp device.
Interference with 25 will be avoided.

In the above, the present invention has been described in detail with reference to specific embodiments, but the present invention is not limited to this.
It will be apparent to those skilled in the art that various embodiments are possible within the scope of the invention.

[Effects of the Invention] As can be understood from the above description of the embodiments, the gist of the present invention is as described in the scope of claims for utility model registration. As is clear from the described configuration, in the present invention, the work table 21 supporting the plate material to be processed is provided.
Is configured to move up and down in synchronism with the vertical movement of the press ram in the press device, and when performing the moving positioning of the plate material to be processed with respect to the press working part of the press device, it is synchronized with the upward movement of the press ram. The work table 21 is moved upward to lift the plate material to be processed from the die.

Therefore, according to the present invention, when the work plate is moved and positioned, the work plate does not rub the upper surface of the die, and the back surface of the work plate is not scratched.

Further, since the vertical movement of the work table 21 is performed in synchronization with the vertical movement of the press ram, the vertical movement of the work table 21 follows the vertical movement of the press ram even when performing press working at high speed. Even if the processing is performed at high speed, it is possible to deal with it.

[Brief description of drawings]

FIG. 1 is a plan view showing one embodiment of a work table device of a press device according to the present invention, and FIG. 2 is a line II-- of FIG.
II is a sectional view, FIG. 3 is a sectional view taken along line III-III in FIG. 1, FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, and FIG. 5 is a work table device according to the present invention. FIG. 6 is a schematic configuration diagram showing one embodiment of a turret type punch press in which is incorporated, and FIG. 6 is a plan view showing a work table portion of the turret type punch press. 1 ... Frame, 3 ... Upper turret 5 ... Lower turret, 7 ... Ram drive shaft 21 ... Auxiliary work table 25 ... Work clamp device 31 ... Drive link element, 33 ... Drive shaft 35 ... Eccentricity Cam, 41 …… Rotating lever 45 …… Repositioning fluid pressure cylinder device 57 …… Timing belt pulley 59 …… Timing belt 61 …… Timing belt pulley 63,65 …… Timing belt type transmission

Claims (1)

[Scope of utility model registration request] 1. A work table device for supporting a plate material to be pressed by a punch and a die provided in a press device, wherein the work table is provided so as to be vertically movable in the vicinity of a press working portion by the punch and the die. (twenty one)
And a table vertical drive means for vertically moving the work table (21) and a press ram vertical drive provided in the press device for vertically moving a press ram (9) having a striker (11) for pressing the punch. Synchronizing means for synchronizing the vertical movement of the means and the vertical movement of the table vertical drive means, and when performing the moving positioning of the plate material to be processed with respect to the press working unit, the press ram ( 9) The work table (21) in synchronization with the upward movement
A work table device of a press device, wherein the work table device is configured to be moved up to lift the plate material to be processed from the die.