JPH0534815Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a turret punch press that prevents deterioration in precision due to frame flexure.

[Conventional technology]

Conventional turret punch presses that continuously punch out workpieces such as thin plates have a frame a that is approximately C-shaped as shown in Fig. A turret d is provided which is rotated around .

Further, above the turret d, there is provided a striking element f which is moved up and down by a rotational drive source e, and by striking the punch g provided on the turret d with this striking element f, the punch g and the die h are separated. The workpiece i is punched out between the
It is moved along a table k in the X-Y direction by a carriage j of an XY feeder.

[Problem that the invention attempts to solve]

However, in the conventional turret punch press mentioned above, when punching the workpiece i, a so-called opening occurs in which the upper and lower parts of the frame a widen due to the load, so the opening angle θ is changed as shown in FIG. The center of the striker f and the center of the punch g will shift,
As a result, a horizontal force is applied to the punch sleeve l and the punch g, which slidably support the punch g, causing problems such as premature wear and seizure of the sliding parts.

[Means and actions for solving problems]

This invention was made with the aim of improving the above-mentioned problem, and the upper striker is mounted on the upper part of the main frame having a freely rotatable turret so that it can be moved up and down so that it is located above the punch and die provided on the turret. The main frame is provided with an auxiliary frame whose at least an upper part is independent of the main frame, and an intermediate striking element is moved up and down on the upper part of the auxiliary frame so as to be positioned between the upper striking element and the punch. By setting it freely,
To provide a turret punch press in which even if a main frame is opened, the punch side is not affected by the opening by striking a punch through an intermediate striker.

〔Example〕

This invention will be explained in detail with an illustrated example.
In the figure, 1 is a main frame formed into a substantially C-shape, and 2 is an auxiliary frame formed into a substantially C-shape, which is provided approximately in the center of the main frame 1, and the lower side of the auxiliary frame 2 is fixed to the main frame 1. hand,
The upper part of the auxiliary frame 2 has a structure independent from the main frame 1.

A rotary shaft 5 is provided at the upper part of the main frame 1, and is rotated by a rotary drive source 3 via a flywheel 4 and a clutch 4a.
The upper striker 9 is moved up and down via the plunger 8.

Further, an intermediate striker 10 is provided below the upper striker 9. This intermediate striker 10 is housed in a bush 11 provided at the top end of the auxiliary frame 2 so as to be able to slide up and down, and is constantly urged upward by a compression spring 12 provided in the bush 11. At the same time, the upper surface of the head of the intermediate striker 10 is formed into a spherical shape.

The lower end of the intermediate striker 10, which has a small diameter, projects above a punch 15 provided on the turret 13 side. The turret 13 is rotatably supported around a support shaft 14 above the upper surface 2a of the auxiliary frame 2, and a punch 15 is mounted on the outer peripheral side of the upper turret 13a, and a die 16 is mounted on the lower turret 13b.
is provided.

The punch 15 is housed in a punch sleeve 15a so as to be vertically slidable, and the compression spring 1
5b, it is always urged upward.

Further, the die 16 is attached to the lower turret 13b side via a die holder 16a, so that the workpiece 17 is punched out between the punches 15, and a die is provided below the lower turret 13b to support the load during punching. A cradle 18 is installed.

On the other hand, 19 is an XY feeder which has a carriage 19b above a head 19a that moves in the XY directions.

This carriage 19b is provided with a clamper 19c, and the workpiece 17 clamped by the clamper 19c is moved in the X-Y direction along the upper surface of the table 20 as the carriage 19b moves.

Next, to explain the operation, the workpiece 17 to be punched is clamped by the clamper 19c and
It is moved in the Y direction and stopped at the punching position.
In this state, the upper striker 9 is lowered by the rotational drive source 3, and the punch 15 of the turret 13 is lowered via the intermediate striker 10 provided on the auxiliary frame 2 side, and the workpiece is moved between the punch 15 and the die 16. 17
is punched out, but at this time, the fourth
Even if the opening shown by angle θ in the figure occurs and the center of the upper striking element 9 deviates from the center of the punch 15, the center of the intermediate striking element 10 provided on the side of the auxiliary frame 2 will be aligned with the center of the punch 15. Since they are aligned and no deviation occurs, no horizontal force is applied to the punch 15 or the punch sleeve 15a that supports it, thereby preventing wear and seizure of the sliding parts. .

[Effect of idea]

As described in detail above, this design is such that the punch of the turret is struck through the intermediate striker provided on the auxiliary frame, so even if the main frame is opened, the punch and the punch sleeve that supports it will not be damaged. Since no horizontal force is applied to the sliding parts, problems such as premature wear and seizure of the sliding parts can be prevented.

Furthermore, it is possible to prevent a decrease in machining accuracy due to misalignment between the punch and die due to wear of the punch sleeve, and also to improve machining accuracy because the clearance between the punch and die can be reduced.

Moreover, since the deflection of the main frame no longer affects machining accuracy, the main frame does not need to have high rigidity, thereby reducing the price of the entire machine.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, in which Fig. 1 is a plan view, Fig. 2 is a side view, Fig. 3 is an enlarged front view of main parts, and Fig. 4 is a sectional view taken along the line of Fig. 3. Fifth
FIG. 6 is a conventional explanatory diagram. 1 is the main frame, 2 is the auxiliary frame, 9 is the upper striking element, 10 is the intermediate striking element, 13 is the turret, 1
5 is punch, 16 is die.

Claims (1)

[Scope of utility model registration request] A punch 1 provided on the turret 13 is mounted on the upper part of the main frame having a rotatable turret 13.
5 and the die 16, in which the upper striker 9 is vertically movable, the main frame 1 is provided with an auxiliary frame 2 whose at least the upper part is independent of the main frame 1, and the auxiliary frame A turret punch press is provided with an intermediate striking member 10 that is movable up and down and located between the upper striking member 9 and the punch 15.