Using data about the force flow in a press for the operation of a ram

Patent metadata

Field	Value
Publication number	US-10464275-B2
Application number	US-201314372217-A
Country	US
Kind code	B2
Filing date	Jan 15, 2013
Priority date	Jan 16, 2012
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

A method of using data on the force flow in a press for the operation of a plunger, wherein the loads of the parts involved in the force flow can differ as a result of eccentrically operating forces, in such a way that the data about the respectively acting forces that, in accordance with Hooke's law, cause an extension or compression of a movement of the parts involved in the force flow, is measured and evaluated in relation to a drive device and a position of the plunger, whereupon a skewed position of the plunger is permitted or a skewed position of the plunger is counteracted or a skewed position of the plunger is set during operation of the press.

First claim

What is claimed is:

1. A method of using data on a force flow in a press to operate a plunger, the method comprising:
providing the press comprising:
a substructure,
at least one drive device arranged in the substructure, the at least one drive device being operatively connected to at least one drive train so as to generate a force,
a plunger comprising at least one upper tool part, the plunger being configured to execute a stroke and to transmit the force,
at least one bottom tool part associated with the plunger and with the at least one upper tool part, the at least one bottom tool part being arranged to the substructure,
at least one traction element or pressure element configured to act on the plunger via a traction connection or pressure connection which is configured to transmit a drive for the stroke of the plunger, the at least one traction element or pressure element and the traction connection or pressure connection being configured to produce a force flow from the drive device to the at least one upper tool part,
a traction point and/or pressure point, the traction connection or pressure connection and the at least one traction element or pressure element being mounted on the plunger in the traction point and/or pressure point so as to allow for a tilting of the plunger, the traction point and/or pressure point, due to elasticities of at least one traction element or pressure element, being configured to allow for a modifiable position between the plunger and the traction element or pressure element,
at least one displacement/stroke measurement device configured to record data on a displacement or the stroke with regard to the position of the plunger,
at least one data recording device configured to record data on at least one of a state or a function relating to, the position of the plunger, the force flow, and a targeted tilting of the plunger,
at least one force flow measuring device configured to record data on the force flow, and
a control and regulation device configured to process the data from the at least one displacement/stroke measurement device, the at least one data recording device, and the at least one force flow measuring device;

providing a workpiece or a material;
working or deforming the workpiece or the material between the at least one upper tool part and the at least one bottom tool part and the plunger with the at least one upper tool part being driven between a top and a bottom dead center in at least one single reversing stroke or in strokes passing through the bottom dead center and a top dead center so as to bear down onto the bottom tool part; and
applying the data processed by the control and regulation device on the force flow acting on and leading to an expansion, a compression, or a movement in an area of the traction point and/or pressure point or of at least one traction element or pressure element in relation to the at least one drive device and a position of the plunger so as to allow, counteract or initiate a tilting of the plunger during an operation of the plunger.

2. The method as recited in claim 1 , wherein at least one traction element or pressure element is provided as a tie rod, a feed rod, a connecting rod, a spindle, or a piston/cylinder unit.

3. The method as recited in claim 1 , wherein the press further comprises a convex spherical segment bearing and a concave spherical segment bearing which are configured to correspond with each other in a manner of a calotte, wherein the traction connection or pressure connection in the traction point and/or pressure point is arranged with the convex spherical segment bearing and the concave spherical segment bearing so as to allow for an articulately changeable bearing of the at least one traction element or pressure element.

4. The method as recited in claim 1 , wherein the processing of the data by the control and regulation device is performed based on a relation according to Hooke's function F=D×Δ.

5. The method as recited in claim 1 , wherein the press further comprises at least one force-recording or displacement-recording element.

6. The method as recited in claim 1 , further comprising:
using at least the at least one displacement/stroke measurement device, or the at least one data recording device, or the at least one force flow measuring device for a controlled or regulated process sequence; and
establishing a relation between data on occurring deformation forces processed by the at least one data recording device or by the at least one force flow measuring device, and data on the position of the plunger detected by the at least one displacement/stroke measurement device or the at least one data recording device.

7. The method as recited in claim 1 , further comprising:
controlling/regulating data detected by the at least one data recording device or by the at least one force flow measuring device, and data on the position of the plunger detected by the at least one displacement/stroke measurement device as reference values so as to implement a desired force flow/force compensation in a process operation.

8. The method as recited in claim 7 , wherein, in the process operation, the process further comprises:
providing the data detected on the position of the plunger as reference values; and
adjusting a desired force flow/force compensation based on the reference values.

9. The method as recited in claim 7 , further comprising:
changing the reference values based on the data detected on the force flow or on the deformation forces, and the reference values based on the data detected on the position of the plunger during the process operation.

10. The method as recited in claim 9 , further comprising:
processing the data resulting from the force flow or from the position of the plunger, which respectively change during the process operation, via at least one of the at least one displacement/stroke measurement device, the at least one data recording device, and the at least one force flow measuring device.

Assignees

• Schuler Pressen Gmbh

Inventors

• Spiesshofer Thomas

Classifications

• B30B15/0094

  Press load monitoring means (B30B15/281 takes precedence) · CPC title

• B30B15/24

  controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam · CPC title

• B30B15/165 Primary

  for pneumatically-hydraulically driven presses · CPC title

• B30B1/28 Primary

  the cam, crank, or eccentric being disposed below the lower platen or table and operating to pull down the upper platen or slide · CPC title