JP2536697Y2 - Press machine lower die support device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower support device for a press machine.

[0002]

2. Description of the Related Art Generally, a lower die (die) used for a press machine is fixedly and interchangeably mounted on a base with an appropriate die holder.

[0003]

[Problems to be Solved by the Invention] If the lower mold is fixedly attached to the base, for example, when the work is press-formed according to the shape formed in the lower mold, the work is unstable and easily rolls. If the heated work is expanded or burrs are formed on the periphery, the work placed on the lower mold will be positioned before the upper mold comes into contact due to the vibration of the press machine. This causes displacement, resulting in non-uniform thickness after pressing, and variations in the outer diameter shape.

The present invention has been made in order to solve the above-mentioned problems, and a work placed on a lower mold is pressed when the ram is lowered, thereby preventing the occurrence of a positional shift.
An object of the present invention is to provide a lower mold supporting device of a press machine capable of press-forming into a uniform shape.

[0005]

In order to achieve the above object, the present invention provides a base having a flat upper surface and a plurality of elastic members which are resiliently directed upward, the upper end of which is located above the upper surface of the base. It is provided so as to protrude, and on the upper surface of each of these elastic members, the die can be moved up and down between an upper limit position where it contacts the die holder fixed to the base and a lower limit position where it contacts the upper surface of the base. It is characterized by being placed as follows.

[0006]

[Work] By placing the die on a plurality of elastic members that are upwardly resilient, the work placed on the die is held between the upper die and the die when the ram is lowered. It descends with the die, and is pressed when the die comes into contact with the upper surface of the base. Therefore, it is possible to prevent the work from being displaced on the die.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows a main part of a press machine, and a lower die supporting device (2) is mounted on a base (1).

The support (3) in the lower mold support device (2) is
It is positioned and mounted on the center of the base (1) by the knock pin (4). The support (3) is a spacer (5),
A plurality of bolts (7) penetrating the fixing plate (6) placed on the upper surface thereof are screwed from above toward the base (1) to prevent the bolts from moving laterally. .

The support (3) has a step (8a) on the outer peripheral surface of a cylindrical fixing ring (8) mounted on the upper surface of the outer peripheral portion.
Is pressed downward by a holding plate (9) fastened together by the bolts (7), thereby preventing movement in the vertical direction. A plurality of (for example, four) through-holes (10) drilled vertically in the center of the support (3) are respectively provided with compression coil springs (11). It is housed slightly protruding from the upper surface of (3).

A die (lower die) (1) is placed on the center of the support (3).
2) is supported by a support cylinder (13) inserted into the upper end of each of the compression coil springs (11), and a plurality of guide rods (14) that break through downward on the lower surface of the die (12), By being slidably fitted in the guide hole (15) of the support (3), it is provided so as to be able to move slightly downward.

The die (12) has a stepped portion on the outer peripheral surface of the die holder (16) fitted around the outer peripheral surface of the die (12) by the fixing ring (8).
By pressing downward with the stepped portion (8b) formed on the inner peripheral surface thereof, it cannot be moved in the lateral direction and is prevented from coming off upward. In this normal state, the upper surface of the die (12) and the upper surfaces of the die holder (16) and the fixing ring (8) are flush with each other.

When the work (W) is press-formed by the lower die supporting device (2) of the above embodiment, as shown in FIG.
While the upper die (18) attached to (7) is descending to the lower limit position, the workpiece (W) is moved upward by the die (1).
When the die (12) compresses the compression coil spring (11) and comes into contact with the upper surface of the support base (3) when the die (12) compresses the compression coil spring (11) while being sandwiched by the upper die (2) and the upper die (18). The work (W) is pressed and shaped.

Therefore, even if vibration or the like occurs in the press machine when the ram (17) is lowered, the work (W) placed on the die (12) is not likely to be displaced. Press forming into a uniform shape according to the shape of ()) is possible.

[0014]

According to the present invention, the work placed on the die is pressed down when the upper die is lowered, so that it is possible to press-mold the work into a uniform shape without causing a positional shift.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a main part of a press equipped with an embodiment of the present invention.

FIG. 2 is an enlarged front view of a main part in a state where the work is held.

[Explanation of symbols]

(1) Base (2) Lower die support device (3) Support base (base) (4) Dowel pin (5) Spacer (6) Fixing plate (7) Bolt (8) Fixing ring (8a) (8b) Step (9) Holding plate (10) Through hole (11) Compression coil spring (elastic member) (12) Die (13) Support cylinder (14) Guide rod (15) Guide hole (16) Die holder (17) Ram (18) Upper mold

Claims (1)

(57) [Scope of request for utility model registration] An upper surface is provided with a plurality of elastic members which are repelled upward so that an upper end thereof protrudes from an upper surface of the base. A lower die for a press machine, wherein the die is placed so as to be able to move up and down between an upper limit position in contact with a die holder fixed to the base and a lower limit position in contact with the upper surface of the base. Support device.