JPH10109199A - Device for assembling and disassembling die for press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the possibility of improper operation of a hydraulic cylinder and to safely and surely execute the changing work of a die from a holder by providing a front cover which is vertically moved by an elevating and lowering device and providing a switching lever for lifting and lowering a hydraulic cylinder and a switch with which the elevating and lowering means is operated only at inactive time of the hydraulic cylinder on both sides of the front cover. SOLUTION: The changeover switch 33 for operating a solenoid switching valve 32 is attached in the upper part before the right side of a fixed cover 27. The changeover switch 33 is electrically connected to a starting switch of a hydraulic pump 21 so as to be turned on only at inactive time of the hydraulic cylinder 17. After placing a die 4 in a prescribed position of the baseplate 12 of a press device 7 in the state where the front cover 28 is lifted and the hydraulic cylinder 17 is contracted, by operating a switching lever 24 by the left hand and the changeover switch 33 by the right hand, the front cover 28 and the piston rod 18 of the hydraulic cylinder 17 are lowered and the changing work of the die 5 from the holder 6 is safely executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for safely and reliably assembling and disassembling a mold including a die and a holder.

[0002]

2. Description of the Related Art For example, since an engine valve is formed by hot pressing, a die (lower die) used for the same is easily worn out. Therefore, after a predetermined number of press workings, a die is moved from its holder. A conversion operation of removing and pressing a new die into the holder is performed.

FIGS. 3 and 4 show a die in the mold (4).
(5) shows a conventional assembling / disassembling apparatus used for replacement work, (7) is a press apparatus for assembling / disassembling, (8) is a hydraulic apparatus, and each has a right support stand (9) and a left side. And a support base (10).

A base plate (12) is laid on a rectangular frame (11) provided on a support (9), and a through hole (13) is formed in the center thereof. A pair of front and rear support blocks (15) are erected at the upper ends of the columns (14) erected at the four corners of the support stand (9), and a mounting plate erected between the center portions of the two support blocks (15). At the center of 16), a hydraulic cylinder (17) facing downward is erected, and a pressing piece (19) is detachably fixed to the lower end of a piston rod (18) that passes through its mounting plate (16). Have been.

[0005] An oil tank (20) of a hydraulic device (8) and a hydraulic pump (21) are mounted on the support base (10) in order. An oil supply valve (22) on the oil tank (20) is provided with an oil tank. The hose (23) is connected to the hydraulic cylinder (17). (24) is a refueling valve (22)
And (25) is a power switch of the hydraulic pump (21).

In the above-mentioned apparatus, a holder (6) into which a die (5) is press-fitted is placed at a predetermined position in the center of a base plate (12), and a hydraulic cylinder (17) is operated by operating a lever (24). When the piston rod (18) is lowered, the die (5) is pushed out of the holder (6) by the pressing piece (19), passes through the through hole (13) of the base plate (12), and is supported. Receiving plate (26) below table (12) on table (10)
Fall on.

[0007]

In the conventional apparatus as described above, the operation of replacing the die (5) is performed by using a lever with one hand.
The operation can be performed by the operation of (24).
(12) The hydraulic cylinder (17) may be accidentally operated while positioning the mold (4) placed on the upper part, and may cause an accident.

An object of the present invention is to provide a press die assembling / disassembling apparatus which does not cause such an accident.

[0009]

SUMMARY OF THE INVENTION According to the present invention, the above object is achieved when a die is pressed into or removed from a holder on a base plate by a pressing force of a downward hydraulic cylinder provided above the base plate. An apparatus for disassembling and assembling a press die, wherein the base plate is provided with a fixed cover surrounding the upper side and the rear upper side on both sides thereof, and a front cover which is raised and lowered by lifting means is provided immediately before the fixed cover. This problem is solved by providing a switching lever for raising and lowering the hydraulic cylinder and a switch that can operate the raising and lowering means only when the hydraulic cylinder is not operated, on both sides close to the front cover.

[0010]

1 and 2 show one embodiment of the present invention. The same members as those in the above-described conventional example are denoted by the same reference numerals, and detailed description thereof will be made. Omitted.

A fixed cover (27) is provided on both sides and the rear side of the base plate (12) to surround the upper side and the rear upper side of the base plate (12). , And is fixed to both front columns (14) so as to be able to move up and down freely.

A transparent viewing window (29) is provided at the center of the front cover (28), and a downward air cylinder (30) is fixed at the left end of the front surface. The lower end of the piston rod (30a) of the air cylinder (30) is fixed to a corner of the rectangular frame (11).

As shown in FIG. 1, an air pipe (31) connected to a lower end of the air cylinder (30) is connected to an air tank (not shown) via an electromagnetic switching valve (32). In FIG. 2, illustration of these air supply devices is omitted.

A changeover switch (33) for operating an electromagnetic changeover valve (32) is provided on the upper right front portion of the fixed cover (27) with a bracket.
(34) attached.

The changeover switch (33) is a hydraulic cylinder.
It is electrically connected to the start switch of the hydraulic pump (21) so as to be turned ON only when (17) is not operated (during rising).

In the device of the present invention described above, the front cover (28) is raised and the hydraulic cylinder (17) is shortened to a predetermined position on the base plate (12) of the press device (7). After placing the mold (4), the switching lever (24) is operated with the left hand, and the switching switch (33) is operated with the right hand, whereby the front cover (28) and the piston rod (17) of the hydraulic cylinder (17) are operated. 18)
Is lowered, and the work of replacing the die (5) from the holder (6) can be performed safely.

[0017]

According to the present invention, the periphery of the press device is
It is surrounded by the fixed cover and the front cover, and when operating the front cover and the hydraulic cylinder, it is necessary to operate both switches and the switching lever with both hands. There is no danger of accidental accidents such as being inserted directly below.

[Brief description of the drawings]

FIG. 1 is a front view in central section of a device of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view in the center longitudinal section of a conventional device.

FIG. 4 is a plan view of the same.

[Explanation of symbols]

 (4) Die (5) Die (6) Holder (7) Pressing device (8) Hydraulic device (9) (10) Support table (11) Square frame (12) Base plate (13) Through hole (14) Post (15) Support block (16) Mounting plate (17) Hydraulic cylinder (18) Piston rod (19) Pressing piece (20) Oil tank (21) Hydraulic pump (22) Oil supply valve (23) Oil hose (24) Switching lever (25) Power switch (26) Receiving plate (27) Fixed cover (28) Front cover (29) Viewing window (30) Air cylinder (30a) Piston rod (31) Air pipe (32) Solenoid selector valve (33) Selector switch (34) Bracket

Claims (1)

[Claims] An apparatus for disassembling and assembling a press die used when a die is pressed into or removed from a holder on a base plate by a pressing force of a downward hydraulic cylinder provided above the base plate. A fixed cover that surrounds the upper and rear upper sides of the base plate, and a front cover that is raised and lowered by lifting means immediately before the fixed cover,
And a switching lever for raising and lowering the hydraulic cylinder and a switch capable of operating the raising and lowering means only when the hydraulic cylinder is not operated are provided on both sides close to the front cover. apparatus.