JPS6025210B2 - Die holder/clamp device - Google Patents

Description

[Detailed Description of the Invention] In a forging press, various molds are prepared depending on the molded product, and if necessary, the mold assembled in the die holder is taken out of the press together with the die holder and replaced.

Conventionally, this replacement was mainly done manually, which required a lot of labor and time and was inefficient. This invention was invented to save labor and improve the efficiency of replacement work, and will be described in detail below with reference to the accompanying drawings.

1 and 2 show the arrangement of a die holder clamp according to the present invention in a press, and 1 is a press frame.

A die holder 2 holds the lower die 3.

A pair of clamp devices A and A' for holding a die holder 2 are attached to the press frame 1. The die holder 2 is pushed into the press from outside the press on a rail 5 by a cylinder or the like (not shown), stopped on the stereotactic layer, and then fixed on the press bed. Note that the left and right clamp devices A and A' have exactly the same configuration except that they are arranged symmetrically, so only the left one will be explained in the following explanation. Referring to FIGS. 3 and subsequent figures, reference numeral 6 denotes a clamp claw whose front surface is mirror-slanted and bare to match the oblique shoulder 7 on the side of the die holder 2.

Reference numeral 8 denotes a clamp cylinder, and a clamp claw 6 is engaged with the front part of this cylinder.

The clamping cylinder 8 has an upper sill 9 and a lower sill 10 on the upper side.

1 1 is the upper piston inserted iron into the upper sill 9,
12 is a lower piston inserted into the lower cylinder 10 with iron. 13 is an oil hole drilled in the center of the upper piston; 1
4 is an oil hole bored in the center of the lower piston 12.

Upper piston 11 and lower piston 12 are held within case 4. The case 4 is fixed to the press frame 1 with mounting bolts 15. Reference numeral 16 denotes rotation stops located on both sides of the clamp claw 6 and attached to the case 4.

The clamp claw 6 is in sliding contact with the rotation preventing member 16 and the sliding surface a (FIG. 4) of the case 4, and is configured to move only in the vertical direction. With the above configuration, the die holder 2 can be introduced into the press and clamped as follows.

'1} Apply hydraulic pressure to the upper cylinder 9' of the right clamp device A' to lower the right clamp claw 6'.

At this time, if the die holder 2 itself is too close to the stone, the right clamp claw 6' pushes the die holder 2, corrects its position to the left, and descends to the stroke end of the cylinder. Conversely, if die holder 2 is too far to the left,
It freely descends to the stroke end and sets the right localization layer of the die holder 2. '2} When hydraulic pressure is applied to the upper cylinder 9 of the left clamp device A and the left clamp claw 6 is lowered,
The die holder 2 is pushed and the shoulder 7 is attached to the right clamping device A'.
It is positioned by sliding it to the right until it hits '.

Therefore, the cylinder 8' of the right-hand clamping device A' always descends to the lower limit position, but the cylinder 8 of the left-hand clamping device A clamps the die holder 2 at a position that leaves a slight margin 8 (Fig. 3), and is clamped sufficiently. It is now possible to apply pressure. '3} The clamp is released by supplying hydraulic pressure to the lower cylinders 10, 10' and releasing the hydraulic pressure to the upper cylinders 9, 9'.

FIG. 6 shows another embodiment of the clamping device.

In this case, the double-acting piston 1 is placed inside the clamp cylinder 17.
8 is iron-filled. Then, when pressure oil is supplied from the oil introduction hole 19, the clamp claw 6 is tightened. Conversely, when releasing the clamp device, if pressure oil is introduced from the oil introduction hole 20,
The clamp claw 6 is raised and released. As described above, according to the present invention, it is not only possible to unclamp the die holder 2 very easily and reliably, but also to position the die holder automatically and accurately while clamping.

Therefore, compared to known devices, this greatly contributes to labor savings when exchanging die holders.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the arrangement of a die holder clamp device in a press. FIG. 2 is a view from the low 0 arrow in FIG. 1. Figure 3 is m- of Figure 1.
Detailed view of the die holder clamp device in a cross-sectional view. FIG. 4 is a sectional view taken along the W arrow in FIG. 3. FIG. 5 is a view taken along the V arrow in FIG. FIG. 6 shows another embodiment of the clamping device. In the figure;
-1...Press frame, 2...Die holder, 3...Lower die, 4...Left case (of the clamp device), 4'...Right case, 5...Rail, 6...Clamp claw, 7... Oblique shoulder (of die holder), 8... Clamping cylinder, 9... Upper cylinder, 10... Lower cylinder, 11... Upper piston, 12...・・・
・Lower piston, 13...Oil hole, 14...
Oil hole, 15... Mounting bolt, 16... Rotating member, 17... Clamp cylinder, 18...
... Rear moving piston, 19 ... Oil introduction hole, 2
0...Oil introduction hole. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1 One side surface is a sloped surface that matches the shoulder surface slope of the die holder, and the back side surface of the side surface is a clamp claw that is movable by sliding on the vertical sliding surface of the case fixed to the press frame. , a clamp comprising a cylinder engaged with the other side surface of the clamp claw, and a piston having one end fitted into the cylinder, the other end fixed to the case, and provided with an oil hole for supplying hydraulic pressure. A device is disposed facing the press frame, and hydraulic pressure is supplied through an oil hole drilled in the piston to move the cylinder, thereby vertically moving a clamp claw that engages with the cylinder. Die holder/clamp device.