JPS5662707A - Structure of spindle of drilling machine - Google Patents

Structure of spindle of drilling machine

Info

Publication number
JPS5662707A
JPS5662707A JP13933879A JP13933879A JPS5662707A JP S5662707 A JPS5662707 A JP S5662707A JP 13933879 A JP13933879 A JP 13933879A JP 13933879 A JP13933879 A JP 13933879A JP S5662707 A JPS5662707 A JP S5662707A
Authority
JP
Japan
Prior art keywords
drill
pressure
housing
drilling
breakage
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
JP13933879A
Other languages
Japanese (ja)
Inventor
Shigeru Nishizawa
Katsumi Nishino
Masanori Nakai
Chiyomatsu Akimoto
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13933879A priority Critical patent/JPS5662707A/en
Publication of JPS5662707A publication Critical patent/JPS5662707A/en
Pending legal-status Critical Current

Links

Landscapes

  • Drilling And Boring (AREA)

Abstract

PURPOSE: To prevent the breakage of a drill by a method wherein a spindle whose housing for the drill is devised to have a double structure is used and the drilling pressure is fixed through the adjustment of pneumatic pressure.
CONSTITUTION: The pressure F acting on the housing 12 is adjusted through the regulation of the pressure of compressed air 17. When the main shaft head 22 is lowered at a fixed speed by a motor 23, the drill 25 chucked by a drill chuck 10 starts to cut an article to be sut. As the drilling pressure rises with the increase of cutting resistance, the drill 25 turns out to be pressed by the housing pressure F irrespective of the speed of a cylinder 15. Since the drilling pressure is set not to exceed a prescribed value through the adjustment of the compressed air, the breakage of the drill is prevented.
COPYRIGHT: (C)1981,JPO&Japio
JP13933879A 1979-10-30 1979-10-30 Structure of spindle of drilling machine Pending JPS5662707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13933879A JPS5662707A (en) 1979-10-30 1979-10-30 Structure of spindle of drilling machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13933879A JPS5662707A (en) 1979-10-30 1979-10-30 Structure of spindle of drilling machine

Publications (1)

Publication Number Publication Date
JPS5662707A true JPS5662707A (en) 1981-05-28

Family

ID=15242992

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13933879A Pending JPS5662707A (en) 1979-10-30 1979-10-30 Structure of spindle of drilling machine

Country Status (1)

Country Link
JP (1) JPS5662707A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8070400B2 (en) * 2005-10-28 2011-12-06 Lg Technologies S.R.L. Device for the high-speed drilling of printed circuit boards

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8070400B2 (en) * 2005-10-28 2011-12-06 Lg Technologies S.R.L. Device for the high-speed drilling of printed circuit boards

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