JPH0337836Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is equipped with a press slide die height adjustment device that is attached to the slide part and adjusts the die height dimension according to the height of the press die and prevents overload. This relates to press machines.

Prior Art In conventional press machines, a die height adjustment device is attached to the bolster section to adjust the die height dimension.

Problems that the invention aims to solve As mentioned above, in the case of an automatic machine equipped with a transfer feeder, etc., in the case where there is a die height adjustment device in the bolster section, the height of the lower die changes due to die height adjustment, and the feed line height changes. There was a bug that changed.

In addition, since it was impossible to prevent overload, it was necessary to remove the problem by cutting the mold.

The present invention was developed in view of the above circumstances, and its purpose is to provide a die height adjustment device A on the slide 1 so that the height of the lower mold can be changed by adjusting the die height, unlike in conventional press machines. The purpose of this invention is to eliminate the problem of the feed line height changing and to prevent overload by an overload prevention mechanism C.

Means and Effects for Solving the Problems The present invention provides a holder 2 which is fixed to the slide 1 and has a wedge accommodating portion 16 in the horizontal direction on the lower end surface of the slide 1 that moves up and down opposite the bolster portion 1'. and the wedge accommodating portion 16 of this holder 2.
An upper wedge 3 is housed in the holder 2 so as to be movable in the horizontal direction, and has a slope 17 on the lower side, and a slope 18 on the upper side that slides into contact with the slope 17 of the upper wedge 3. A movably provided lower wedge 4 and this lower wedge 4
A die set mounting plate 5 is fixed to the lower side of the holder 2 and is attached to the holder 2 while being biased upward.
and an upper wedge feeding mechanism B that is connected to one end of the upper wedge 3 and moves the upper wedge 3 in the horizontal direction. A cylinder 23 is provided on one side of the holder 2, and a piston 14 is fitted into the cylinder 23.
The slide 1 is supported by an overload prevention mechanism C consisting of an overload protector valve 15 that sets the oil pressure inside the cylinder 23.
The die height adjustment device A at the bottom of the press mold adjusts the die height dimension according to the height of the press mold, and the overload prevention mechanism C prevents overload.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a slide, and 1' is a bolster.
Further, A is a die height adjusting device attached to the lower part of the slide 1.

The die height adjustment device A includes a holder 2 fixed to the lower surface of the slide 1. The holder 2 is provided with a wedge accommodating portion 16, and an upper wedge 3 is movable in the horizontal direction within the wedge accommodating portion 16. In addition, a lower wedge 4 is provided to be movable up and down, and a die set mounting plate 5 is attached to the lower surface of the lower wedge 4 with bolts 6, and this mounting plate 5 is held on the holder 2 by a wedge clamper 7. The slope 18 on the upper surface of the lower wedge 4 is in sliding contact with the slope 17 on the lower surface of the upper wedge 3.

The wedge clamper 7 is of a hydraulic type, and a piston part 21 of a rod 20 is inserted into a cylinder part 19 provided on the holder 2, and the die set mounting plate 5 is suspended by the lower end of the rod 20. Hydraulic pressure is supplied to the rod side chamber 22.

An upper wedge feeding mechanism B and an overload prevention mechanism C are provided at the side end of the holder 2.

The upper wedge feeding mechanism B includes a nut member 10 that is rotatably and horizontally movably provided on the holder 2. A screw 8 is screwed into the nut member 10, and the screw 8 is screwed into the nut member 10 by a pin 9. It is connected to the end of the upper wedge 3. A worm wheel 11 is attached to the periphery of the nut member 10, and a worm 13 meshes with the worm wheel 11.

The overload prevention mechanism C includes a cylinder 23 provided in the holder 2. A piston 14 is fitted into the cylinder 23. One end surface of the piston 14 is in contact with the end surface of the nut member 10. The other side is made into a hydraulic chamber 24. Hydraulic pressure commensurate with the press capacity is introduced into this hydraulic chamber 24 via an overload protector valve 15.

25 in the drawing is a knockout pin.

Next, the operation will be explained.

The die height dimension of the slide 1 is adjusted as follows.

That is, by rotating the worm 13, the nut member 10 is rotated via the worm wheel 11, the screw 8 is moved horizontally (left and right), and the upper wedge 3 is moved horizontally via the pin 9. By this movement of the upper wedge 3, the lower wedge 2 is moved in the vertical direction, and the die set mounting plate 5 is moved in the vertical direction to adjust the die height dimension of the slide 1.

Moreover, overload prevention is performed as follows.

The overload protector valve 15 is in a balanced state with hydraulic pressure and air pressure commensurate with the press capacity.

When an overload occurs on the die set mounting plate 5, the oil pressure in the hydraulic chamber 24 exceeds the specified oil pressure, the balance between the oil pressure and the air pressure in the overload protector valve 15 is disrupted, and the oil is transferred to the outside (hydraulic tank). ), the press machine comes to an emergency stop, and the piston 14 moves to the right in FIG. Then, the die set mounting plate 5 moves upward to prevent the press machine from being damaged.

Effects of the invention The invention is as described above, and since the die height adjustment device A is provided on the slide 1, there is a problem that the lower mold height changes due to die height adjustment and the feed line height changes, unlike in conventional press machines. Moreover, the overload prevention mechanism C can prevent overload.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view of a die height adjusting device equipped with an overload prevention mechanism, and FIG. 3 is a cross-sectional view taken along the line shown in FIG. 2. 1 is the slide, 5 is the die set mounting plate,
A is the die height adjustment device, and C is the overload prevention mechanism.

Claims (1)

[Scope of utility model registration request] A holder 2 fixed to the slide 1 and having a wedge accommodating portion 16 in the horizontal direction on the lower end surface of the slide 1 that moves up and down facing the bolster portion 1';
An upper wedge 3 is housed in the wedge accommodating portion 16 of the holder 2 so as to be horizontally movable and has a slope 17 on the lower side;
a lower wedge 4 having a slope 18 slidingly in contact with the slope 17 of the holder 2 and movable in the vertical direction on the holder 2; a die set mounting plate 5 that is biased toward the die set, and an upper wedge feeding mechanism B that is connected to one end of the upper wedge 3 and moves the upper wedge 3 in the horizontal direction.
A die set adjustment device A is provided, which allows the portion of the upper wedge feeding mechanism B to be moved in the direction in which the upper wedge 3 comes out, and the portion to be fed is connected to a cylinder 23 provided on one side of the holder 2 and A press machine characterized in that it is supported by an overload prevention mechanism C consisting of a piston 14 that fits into a cylinder 23 and an overload protector valve 15 that sets the oil pressure inside the cylinder 23.