Monitoring system, method for the process-parallel monitoring of collision or overload situations in machine tools

• US 6,975,919 B2
• Filed: 09/12/2002
• Issued: 12/13/2005
• Est. Priority Date: 09/12/2001
• Status: Expired due to Fees

• Current Assignee: Werner Kluft
• Original Assignee: Werner Kluft
• Inventors: Kluft, Werner
• Primary Examiner(s): Paladini, Albert W.
• Assistant Examiner(s): Shechtman, Sean
• Application Number:
  US10/489,355
• Publication Number:
  US 20050004699A1
• Time in Patent Office: 1,188 Days
• Field of Search: 700/12, 700/13, 700/23, 700/26, 700/27, 700/30, 700/33, 700/49, 700/51, 700/175, 700/177, 700/178, 700/255, 702179-187
• US Class Current: 700/177
• CPC Class Codes: G05B 19/4061 Avoiding collision or forbidden zones

Abstract

In a monitoring system for the process-accompanying monitoring or detection of collision or overstress situations in machine tools (1), comprising a machine control (2) with one or more sensors (4) for detecting measured signals or measured signal curves, a monitoring means (6) in which a comparison of the measured signals or measured signal curves of at least one sensor (4) with stored monitoring thresholds is performed, and a bidirectional interface (8) between the monitoring means (6) and the machine control (2), it is provided that the monitoring means (6), apart from detecting collision or overstress situations in a machine tool (1) and transferring machine stop or machine reaction instructions to the machine control (2), also permanently stores the measured signals or measured signal curves of the sensors (4) as measured by the sensors (4) before, during and after a collision or overstress situation and the data and statuses of the machine control (2).

Claims

1. A monitoring system for in-process monitoring of machine tool events comprising:

control means for controlling the operation of a machine tool and providing actual data and statuses of the control means,

at least one sensor means for currently monitoring at least one of machine tool collision events and machine tool overstress condition events and providing current signal data,

first means for storing said current signal data of the at least one sensor means for providing current signal data records of said at least one sensor means,

second means for storing threshold data for each sensor means,

means for comparing the current signal data of each sensor means and the respective threshold data for each sensor means for determining at least one of machine tool collision events and machine tool overstress condition events and upon exceeding at least one of the respective threshold signal data generating an event detection signal,

bidirectional interface means for operating the control means to immediately control machine tool operation and to provide said actual data and statuses of the control means in response to the event detection signal, and

means responsive to the event detection signal for permanently storing a data record of the event, consisting of the current signal data records of the first storing means immediately before, during and after the generation of the event detection signal and said actual data and statuses of the control means provided by said bidirectional interface whereby the cause of the at least one of the machine tool collision events and machine tool overstress condition events is readily determined on the basis of the said data record of the event.