JPS6487093A - Automatic focal distance adjusting device in laser beam machine - Google Patents

Automatic focal distance adjusting device in laser beam machine

Info

Publication number
JPS6487093A
JPS6487093A JP62244382A JP24438287A JPS6487093A JP S6487093 A JPS6487093 A JP S6487093A JP 62244382 A JP62244382 A JP 62244382A JP 24438287 A JP24438287 A JP 24438287A JP S6487093 A JPS6487093 A JP S6487093A
Authority
JP
Japan
Prior art keywords
computing element
focal distance
distance measuring
deltav
amt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62244382A
Other languages
Japanese (ja)
Inventor
Kazuo Ota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP62244382A priority Critical patent/JPS6487093A/en
Publication of JPS6487093A publication Critical patent/JPS6487093A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
    • B23K26/046—Automatically focusing the laser beam

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

PURPOSE:To make the whole device body compact in <=1/2 in its volume and yet to obtain a transferable weight of about 10 times by connecting a distance measuring sensor to the input side of the comparison computing element to which a command focal distance signal is inputted and connecting the electromagnetic operation part of an electromagnetic direction control valve to the output side of the comparison computing element. CONSTITUTION:An electromagnetic direction control valve 9 is controlled so as to feed to a direct acting actuator 7 the pure water in the flow amt. DELTAQ proportionate to the speed command DELTAV sent from a comparison computing element 12. The speed command DELTAV and the movement amt. DELTAH in the optical axial direction of a condensing lens 5 are in a comparison relation and therefore the distance measuring signal Vi by the distance measuring sensor 10 is also in a proportional relation to DELTAV. At the time when the command focal distance input signal Vin inputted to a comparison computing element 12 in advance is equal to the distance measuring output signal Vi by the sensor 10, the flow amt. of an electromagnetic direction control valve 9 becomes zero, therefore, and a constant focal distance is kept constantly. And the operation speed and holding part transferable weight can be changed by the flow amt. of a variable throttle 14.
JP62244382A 1987-09-30 1987-09-30 Automatic focal distance adjusting device in laser beam machine Pending JPS6487093A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62244382A JPS6487093A (en) 1987-09-30 1987-09-30 Automatic focal distance adjusting device in laser beam machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62244382A JPS6487093A (en) 1987-09-30 1987-09-30 Automatic focal distance adjusting device in laser beam machine

Publications (1)

Publication Number Publication Date
JPS6487093A true JPS6487093A (en) 1989-03-31

Family

ID=17117854

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62244382A Pending JPS6487093A (en) 1987-09-30 1987-09-30 Automatic focal distance adjusting device in laser beam machine

Country Status (1)

Country Link
JP (1) JPS6487093A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5624587A (en) * 1993-03-08 1997-04-29 Mitsubishi Denki Kabushiki Kaisha Laser machining apparatus and method of setting focus thereof
JP2013021353A (en) * 2005-05-26 2013-01-31 Cymer Inc Systems and methods for implementing interaction between laser shaped as line beam and film deposited on substrate
CN105382410A (en) * 2015-12-29 2016-03-09 苏州润昇精密机械有限公司 Laser welding equipment with automatic trace function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5624587A (en) * 1993-03-08 1997-04-29 Mitsubishi Denki Kabushiki Kaisha Laser machining apparatus and method of setting focus thereof
JP2013021353A (en) * 2005-05-26 2013-01-31 Cymer Inc Systems and methods for implementing interaction between laser shaped as line beam and film deposited on substrate
CN105382410A (en) * 2015-12-29 2016-03-09 苏州润昇精密机械有限公司 Laser welding equipment with automatic trace function

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