JPS5823458Y2 - Press machine mold clamp device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a mold clamping device for a press machine.

Various structures are known for mold clamping devices. For example, in the so-called front pull type, which moves the die plate back and forth to carry it in and out on a bolster plate, a T-shaped clamp is attached to the bolster plate. The metal fittings are equipped so that they can be driven up and down, and T-shaped grooves are formed on the bottom surface of the die plate in the front and back to engage the clamp fittings, and by lowering the clamp fittings to be engaged with the grooves, the die plate can be moved up and down on the bolster plate. There is a pressure welding method for fixing the
In this case, it is necessary to carry in the die plate while engaging a plurality of clamp fittings in one groove, which has the disadvantage that the positioning operation is troublesome.

The present invention aims to provide a mold clamping device that is easy to handle and operate, in which a clamp shaft is passed through a die plate on a bolster plate, and a clamp fitting that acts on the die plate is attached to the tip of the clamp shaft. It is characterized by being engaged from the side, and the mold can be easily positioned on the bolster plate, and in order to simplify the structure, the clamp shaft is constructed with a piston rod of a hydraulic cylinder. Then, the piston rond clamp shaft is pushed down below the top surface of the bolster plate with the bottom surface of the die plate and pressed upward by the spring, and the die plate is installed when the hole position is aligned with the clamp shaft. The clamp shaft is automatically inserted into the mounting hole of the die plate by the force of the spring, so that the die plate can be easily aligned on the bolster plate.

Hereinafter, embodiments of the present invention will be described based on the drawings.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows the entire press machine. A die plate 4, to which a lower die 3 is fixed in advance with bolts, etc., is fixed to a bolster plate 2 fixed on a base 1, and an upper die plate 4 is fixed on the lower surface of a ram 5. A die plate 1 to which a mold 6 is fixed is fixed.

A hydraulic die lifter device 8 is incorporated in the bolster plate 2, so that the die plate 4 can be carried in and carried out while floating above the bolster plate.

Here, details of the clamp device will be explained based on FIGS. 2 to 4.

The bolster plate 2 is equipped with a clamp shaft 11 that is projected upward by a spring 9 and forcibly retracted by supplying pressure oil to a hydraulic cylinder 10.

The hydraulic cylinder 10 is bolted upward into the thickness of the bolster plate 2 without protruding upward.

The clamp shaft 11 is taken from the piston rod of this hydraulic cylinder 10.

This clamp shaft 11 is retracted from the upper surface of the bolster plate 2 as shown in FIG. 3 when the die plate is carried in, and
After suitably aligning the die plate 4, the clamp shaft 11 is protruded through the mounting hole 12 formed in the outer peripheral spine of the plate 4, and the die plate 4 is positioned, and an annular groove is formed at the protruding end. A C-shaped clamp fitting 14 is engaged with the connecting portion 13 from the side, and then the clamp shaft 11 is hydraulically lowered again to force the die plate 4, which is locked by the clamp fitting 14, onto the upper surface of the bolster plate 2. It is configured to be fixed by pressure contact.

In summary, the present invention allows the clamp shaft to be sunk below the top surface of the bolster plate when the mold is carried onto the bolster plate for mold replacement. It can be easily and quickly transported to the central location without any obstacles or restrictions.

What's more, after loading the die plate, you can move the die plate freely for alignment while pressing the clamp shaft upward with the spring, and when the mounting hole of the die plate is aligned with the clamp shaft, the clamp Since the shaft is automatically inserted into the mounting hole of the die plate by the force of the spring, the positioning can be easily and quickly performed.

Moreover, the die plate can be easily and quickly fixed on the bolster plate simply by moving the clamp fitting laterally at the upper end of the clamp shaft protruding above the die plate and tightening the hydraulic cylinder. Easy and efficient operation.

In addition, the structure for this purpose is to fix the hydraulic cylinder to the bolster plate, configure the clamp shaft with the piston rond of the hydraulic cylinder, and attach the clamp fitting directly to the upper end of this piston rond clamp shaft. Since no transmission mechanism is required, the structure is very simple and compact, and can be easily implemented at low cost.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the press machine, Fig. 2 is a longitudinal sectional side view of the main part showing the clamped state, Fig. 3 is a longitudinal sectional side view of the main part in the unclamped state, and Fig. 4 is a plan view of the main part in the clamped state. It is a diagram. 2... Bolster plate, 4... Die plate, 9... Spring, 10... Hydraulic cylinder, 11... Clamp shaft, 12...
...Mounting hole, 13...Engagement connection part, 14...
... Clamp fittings.

Claims (1)

[Scope of utility model registration request] Hydraulic cylinder, da 1 is attached to the bolster plate 2 of the press machine.
0 is fixed upward without protruding upward, and the clamp shaft 11 is secured from the piston rod 11 of the hydraulic cylinder 10.
is formed on the upper end of the clamp shaft 11 so that it can be moved in and out of the position where it retracts below the upper surface of the bolster plate 2 and the position where it advances above the upper surface of the die plate 4 on the bolster plate 2. The clamp fitting 14 can be moved and locked from the side to the engagement connecting portion 13, and the clamp shaft 11 is elastically biased upward by the spring 9, and the attachment L12 is attached to the outer peripheral spine of the die plate 4. With the die plate 4 placed vertically on the bolster plate 2, the die plate 4 is positioned horizontally by fitting the clamp shaft 11 into the mounting hole 12 with spring force, and the die plate 4 is placed on the die plate 4. The die plate 4 is fixed on the bolster plate 2 by the clamp fitting 14 by engaging the clamp fitting 14 with the engagement connecting portion 13 of the clamp shaft 11 that protrudes from the top and driving the clamp shaft 11 down. A mold clamping device for press machines featuring the following features: