US 10,538,011 B2Granted

Method for monitoring the machine space of a processing machine, preferably a moulding machine, and processing machine, particularly moulding machine, for carrying out such a method

AssigneeMichael Weinig AG

InventorsRainer Gramlich, Hubert Klein, Rainer Kurz, Peter Martin, Walter Rapp, Ralf Wagner

Life of this patent

Estimating the term…

Loading patent…

Abstract

In monitoring the machine space of a processing machine during the throughput of workpieces in order to detect workpieces that got stuck, the rear end of a workpiece with reference to the transport direction generates a start signal in the inlet region of the machine space, as well as an end signal in the outlet region thereof by sensors that are connected to a control unit. Beginning with the start signal, the control unit detects a feature that characterizes a theoretical feed travel and generates a release signal if the value of the detected characteristic feature has reached at the time, at which the end signal is generated, a predefined limiting value and not yet exceeded a predefined upper limiting value or if the end signal is generated at a time, at which the value of the detected characteristic feature has reached the predefined limiting value and not yet exceeded the upper limiting value.

Claims16

Dependent claims

A method for monitoring a machine space of a woodworking moulding machine, the method comprising:

passing a workpiece of wood in a transport direction through the machine space from an inlet region of the machine space to an outlet region of the machine space;
generating a start signal via a first sensor when a rear end of the workpiece of wood passes through the inlet region;
sending the start signal to a control unit;
generating an end signal via a second sensor when the rear end of the workpiece of wood passes through the outlet region;
sending the end signal to the control unit;
detecting a rotation of a driveshaft of a transport element transporting the workpiece of wood through the machine space via at least one third sensor;
sending the detected rotation to the control unit;
deriving a theoretical feed distance of the workpiece of wood in the machine space via the control unit based on the detected rotation and a time at which the control unit receives the start signal;
comparing the derived theoretical feed distance of the workpiece of wood to a predefined limiting value that is based on a distance between the first and second sensors via the control unit;
and
generating a release signal via the control unit
if the value of the theoretical feed distance, derived at a time at which the end signal is generated, has reached the predefined limiting value;
or
if the end signal is generated at the time when the derived value of the theoretical feed distance has reached the predefined limiting value.

11 more elements

A woodworking moulding machine, comprising:

transport elements (14 to 18) configured to transport a workpiece (1) in a transport direction (6) through a machine space of the woodworking moulding machine from an inlet region of the machine space to an outlet region of the machine space;
a first sensor (29) arranged in the inlet region of the machine space of the woodworking moulding machine and configured to generate a start signal when the rear end of the workpiece (1), with reference to the transport direction (6) of the workpiece (1), passes through the inlet region;
a second sensor (30) arranged in the outlet region of the machine space of the woodworking moulding machine and configured to generate an end signal when the rear end of the workpiece (1), with reference to the transport direction (6) of the workpiece (1), passes through the outlet region;
at least one third sensor (31) configured to detect a rotation of a driveshaft (26) of one of the transport elements (14 to 18) transporting the workpiece (1) through the machine space;
and
a control unit (32),
wherein the first sensor (29), the second sensor (30), and the at least one third sensor (31) are connected to the control unit (32);
and
wherein the control unit (32) is configured:
to receive the start signal, the detected rotation, and the end signal;
to derive a theoretical feed distance of the workpiece (1) in the machine space based on the detected rotation and a time at which the control unit receives the start signal;
to compare the derived theoretical feed distance of the workpiece (1) to a predefined limiting value that is based on a distance between the first sensor (29) and the second sensor (30);
and
to generate a release signal
if the value of the theoretical feed distance, derived at a time at which the end signal is generated, has reached the predefined limiting value;
or
if the end signal is generated at the time when the derived value of the theoretical feed distance has reached the predefined limiting value.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/928,027Filed 30 Oct 2015
Priority: DE 10 2014 016 6284 Nov 2014
Published: US 2016/0121520 A15 May 2016
Granted: 21 Jan 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B27C 1/08
Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor: machines for working several sides of work simultaneously
B23Q 11/0085
Safety devices protecting the operator, e.g. against accident or noise: by determining whether the machine tool is in a dangerous configuration
B27C 1/12
Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor: arrangements for feeding work
B27C 5/06
Machines with table: arrangements for clamping or feeding work