US 10,160,175 B2Granted

Press machine and method for controlling slide of press machine

AssigneeAida Engineering, Ltd.

InventorsYasuyuki Kohno, Ryosho Iwamura, Tadahiro Kondo

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Abstract

There is provided a press machine which can apply a large compression force to a mold as well as impart smooth vibration only in a rectilinear advancing direction to the mold, and thereby can improve the press-formability. A main slide and a sub-slide constitute a slide and at the same time a cylinder-piston mechanism. During press-forming, a compression force is transmitted to the sub-slide (an upper mold) through hydraulic pressure applied interlockingly with driving of the main slide, and the sub-slide is vibrated with the hydraulic pressure being periodically changed. Favorable press-forming can be performed even under relatively difficult press-forming conditions, by controlling the vibration such that a vibration frequency of the sub-slide (the upper mold) becomes 9 Hz or higher but 33.3 Hz or lower and a vibration amplitude of the sub-slide becomes 0.05 mm or larger but 0.5 mm or smaller.

Claims17

Dependent claims

A press machine comprising:

a main slide reciprocable in a rectilinear advancing direction;
a main slide drive device configured to drive the main slide to reciprocate in the rectilinear advancing direction;
a sub-slide on which a mold is mounted, the sub-slide reciprocable in the same direction as the main slid, and a compression force applied to the main slide being transmitted to the sub-slide through hydraulic pressure, wherein the main slide and the sub-slide constitute a cylinder-piston mechanism, and the main slide is one of a cylinder and a piston of the cylinder-piston mechanism, while the sub-slide is the other of the cylinder and the piston of the cylinder-piston mechanism;
a sub-slide drive device configured to drive the sub-slide to reciprocate relative to the main slide, the sub-slide drive device driving the sub-slide to reciprocate in the same direction as the main slide in response to a change in the hydraulic pressure;
and
a vibration control device configured to control, through the sub-slide drive device, the sub-slide to vibrate at least two times during one press operation cycle, by periodically changing the hydraulic pressure, wherein
a material is formed through cooperation between the main slide drive device and the sub-slide drive device during the one press operation cycle.

4 more elements

A method for controlling a slide of a press machine including a main slide reciprocable in a rectilinear advancing direction, and a sub-slide, on which a mold is mounted, reciprocable in the same direction as the main slide, wherein the main slide and the sub-slide constitute a cylinder-piston mechanism, and the main slide is one of a cylinder and a piston of the cylinder-piston mechanism, while the sub-slide is the other of the cylinder and the piston of the cylinder-piston mechanism, the method comprising steps of:

driving the main slide in the rectilinear advancing direction and driving the sub-slide in the rectilinear advancing direction interlockingly with the driving of the main slide, so as to transmit a compression force to the sub-slide through a hydraulic pressure applied interlockingly with the driving of the main slide at least during forming of a material during one press operation cycle;
and
vibrating the sub-slide at least two times during the one press operation cycle by periodically changing the hydraulic pressure at least during forming of the material.

Dependencies are inferred from the claim text.

Facts

Application: 14/166,441Filed 28 Jan 2014
Priority: JP 2013-01437929 Jan 2013
Published: US 2014/0208964 A131 Jul 2014
Granted: 25 Dec 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B30B 15/165
Control arrangements for fluid-driven presses: for pneumatically-hydraulically driven presses
B23Q 5/033
Reciprocating members: driven essentially by fluid pressure
B30B 1/265
By cams, eccentrics, or cranks: using a fluid connecting unit between drive shaft and press ram
B30B 1/34
By plungers under fluid pressure: involving a plurality of plungers acting on the platen