Path-controlled press having a sliding block

Patent metadata

Field	Value
Publication number	US-11084240-B2
Application number	US-201615776827-A
Country	US
Kind code	B2
Filing date	Nov 10, 2016
Priority date	Nov 20, 2015
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A path-controlled press, with at least one drive shaft having a driver that is eccentric relative to a shaft axis, and a sliding block, wherein the sliding block is driven by the driver to perform a forcibly actuated movement During the execution of a pressure stroke, the sliding block is guided on at least one sliding surface on the pressure side in relation to a pressure-side surface of a slide guide. The sliding block has a sliding surface on the pulling side opposite the sliding surface on the pressure side, which is guided on a surface of the slide guide on the pulling side. The sliding surface on the pressure side of the sliding block has a concave or convex curvature. The sliding surface on the pulling side of the sliding block has another respective concave or convex curvature.

First claim

The invention claimed is:

1. A path-controlled press, comprising:
at least one drive shaft having a driver that is eccentric relative to a shaft axis (W); and
a sliding block, wherein the sliding block is driven by the driver to perform a forcibly guided movement, wherein during execution of a pressure stroke, the sliding block is guided on at least one sliding surface on a pressure-input side in relation to a pressure-input-side surface of a slide guide, wherein the sliding block has a sliding surface on a pressure-output side lying opposite the at least one sliding surface on the pressure-input side, the sliding surface on the pressure-output side being guided on a pressure-output-side surface of the slide guide, wherein a drive of the at least one drive shaft comprises a first motor, a flywheel which is drivable by the first motor, and a second motor, wherein the flywheel is detachably connectible to the at least one drive shaft by means of a coupling, and wherein the at least one drive shaft is drivable via the second motor;
wherein the first motor and the flywheel are disposed on a first end of the at least one drive shaft and arranged coaxially to one another and to the at least one drive shaft; and
wherein the second motor is a torque motor disposed on a second end of the at least one drive shaft opposite the first motor and the flywheel and wherein the second motor is concentric to the at least one drive shaft,
wherein an ejecting mechanism is provided in a ram of the press, which has an ejector that is movable within a guide of the ram, and acts on a workpiece, wherein the ejecting mechanism is activated by movement of the sliding block.

2. The path-controlled press as claimed in claim 1 , wherein the coupling is configured to engage the flywheel to the at least one drive shaft when a drive shaft and flywheel rotational speed at the coupling are at least approximately equal, wherein an equalizing of the rotational speeds occurs by a targeted actuation of the second motor.

3. The path-controlled press as claimed in claim 1 , wherein the first motor and the flywheel are integrated as one structural unit in a flywheel motor.

4. The path-controlled press as claimed in claim 1 , wherein the flywheel can be coupled without gearing up to the at least one drive shaft, while the flywheel is arranged concentric to the at least one drive shaft.

5. The path-controlled press as claimed in claim 1 , wherein a brake of the at least one drive shaft is provided, being concentric to the torque motor and overlapping the torque motor along the shaft axis.

6. The path-controlled press as claimed in claim 1 , wherein the at least one drive shaft starting from a resting start position passes through an angle of rotation between 370° and 450° via the pressure stroke up to a resting stop position.

7. The path-controlled press as claimed in claim 1 , wherein the at least one pressure-input-side sliding surface on the sliding block has a concave or convex curvature, wherein the pressure-output-side sliding surface of the sliding block has the other of the concave or convex curvature, respectively.

8. The path-controlled press as claimed in claim 7 , wherein the sliding block executes a pendulum movement about a pendulum axis, wherein the pendulum axis is situated outside the sliding block.

9. The path-controlled press as claimed in claim 8 , wherein the driver travels about an eccentric axis in the sliding block, wherein the eccentric axis has a spacing R relative to the shaft axis, wherein the eccentric axis has a spacing L relative to the pendulum axis, and wherein: 12>=L:R>=5.

10. The path-controlled press as claimed in claim 1 , wherein an adjusting element in the form of an adjustably rotatable eccentric ring, is arranged between the driver and the sliding block.

11. The path-controlled press as claimed in claim 1 , wherein a pressure piece is moved during the pressure stroke essentially in a line with the ram of the press.

12. The path-controlled press as claimed in claim 1 , wherein a wedge is located between a press frame and the ram of the press.

13. The path-controlled press as claimed in claim 1 , wherein gearing is arranged between the sliding block and the ejector.

Assignees

• Sms Group Gmbh

Inventors

• Krieger Wilhelm
• Fuchshofen Dieter
• Gober Norbert

Classifications

• B30B15/068

  Drive connections, e.g. pivotal · CPC title

• B30B1/266 Primary

  Drive systems for the cam, eccentric or crank axis · CPC title

• B30B1/26

  by cams, eccentrics, or cranks · CPC title

• B30B15/0035

  using an adjustable connection between the press drive means and the press slide · CPC title

• B30B1/40

  by wedge means · CPC title