Magnetic clamping device and method for detecting and controlling an operating state of a magnetic clamping device

A technology of clamping device and electromagnetic clamp, applied in the direction of workpiece clamping device, electromagnet, manufacturing tools, etc., can solve the problems of insufficient electromagnetic coupling and so on

Inactive Publication Date: 2004-11-03
STAUBLI FAVERGES SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this approach results in insufficient electromagnetic coupling for maintaining the working

Method used

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  • Magnetic clamping device and method for detecting and controlling an operating state of a magnetic clamping device
  • Magnetic clamping device and method for detecting and controlling an operating state of a magnetic clamping device
  • Magnetic clamping device and method for detecting and controlling an operating state of a magnetic clamping device

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Embodiment Construction

[0042] figure 2 One embodiment of an injection molding machine 10 is schematically shown having a fixed platen 12 and a movable platen 14 mounted respectively by electromagnetic clamping devices (“clamps”) 16 On the injection molding machine 10, the above-mentioned electromagnetic clamping device 16 is suitable to work as a quick mold changing device. During normal operation, there are many forces that oppose the clamping force produced by the clamp 16, namely, ejector force 13 due to incorrect machine adjustment, inertial force during mold closing stroke 15, nozzle pressure 17 and opening Mold force 19.

[0043] In order to counteract these effects and other operating conditions that produce interrupted electromagnetic clamping forces, an electromagnetic clamping device with a multifunctional sensing system as described below is provided at the clamping interface, that is, at the electromagnetic clamping unit 110 .

[0044] An embodiment of the electromagnetic holding unit...

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Abstract

The present invention discloses a magnetic clamping device having at least one magnetic holding unit comprising a switchable magnet generating a magnetic clamping force at a workpiece and a sensing means, wherein said sensing means comprises a search coil adapted to provide a detection signal indicative of a magnetic flux being applicable for at least approximately determining a clamping force exerted on the workpiece to be clamped and a method for detecting an operating state of a magnetic clamping device.

Description

technical field [0001] The invention relates to an electromagnetic clamping device and a method for detecting and controlling the working state of the electromagnetic clamping device. Background technique [0002] In general, clamping devices are necessary in various material handling and production machines, such as (industrial) robots, handling devices or injection molding machines, for example for (releasably) mounting on assembly lines in the automotive industry A tool (such as a welding gun or chuck) or workpiece is attached to the robotic arm of a manipulator or an injection mold is attached to a molding table. [0003] Material handling and production machines such as robots, handling devices or injection molding machines are generally equipped with various sensing devices to ensure that mechanical or hydraulic based coupling mechanisms are properly engaged so that their work continues. In order to minimize downtime (such as for changing the tool of a robot) and maxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q3/15B25B11/00B29C33/32B29C45/17B29C45/64H01F7/20
CPCB29C45/1742H01F7/206B29C2045/1746H01F2007/208B25B11/002H01F13/00
Inventor M·A·约翰逊S·C·巴顿
Owner STAUBLI FAVERGES SA
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