US3875839A - Bandsaw - Google Patents

Bandsaw Download PDF

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Publication number
US3875839A
US3875839A US367895A US36789573A US3875839A US 3875839 A US3875839 A US 3875839A US 367895 A US367895 A US 367895A US 36789573 A US36789573 A US 36789573A US 3875839 A US3875839 A US 3875839A
Authority
US
United States
Prior art keywords
head assembly
workpiece
bandsaw
cutting
cut
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.)
Expired - Lifetime
Application number
US367895A
Other languages
English (en)
Inventor
Tsuneo Aizawa
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.)
Amada Co Ltd
Original Assignee
Amada Co 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 Amada Co Ltd filed Critical Amada Co Ltd
Application granted granted Critical
Publication of US3875839A publication Critical patent/US3875839A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D55/00—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts
    • B23D55/08—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts of devices for guiding or feeding strap saw blades
    • B23D55/088—Devices for feeding strap saw blades
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/525—Operation controlled by detector means responsive to work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/707—By endless band or chain knife
    • Y10T83/7101—With tool in-feed
    • Y10T83/7133—By gravity
    • Y10T83/7139—With fluid in-feed regulating means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/707—By endless band or chain knife
    • Y10T83/7101—With tool in-feed
    • Y10T83/7145—By motor-driven mechanism
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/707—By endless band or chain knife
    • Y10T83/7195—Including means to adjust relationship between band and work-support surface
    • Y10T83/722—By varying distance between band and work-support surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8696—Means to change datum plane of tool or tool presser stroke

Definitions

  • a bandsaw machine is provided with a device in which a check valve having a tappet or projection and a flow control valve are provided in parallel with each other in a hydraulic passage connecting a hydraulic pump with a hydraulic cylinder for raising a cutting head holding a bandsaw blade, a micro switch is electrically connected with an electric motor for driving said pump and a solenoid operated valve for controlling hydraulic fluid through a time limit switch, a vertical elongate rod is vertically movably mounted on a part of said cutting head and is provided at its bottom end with an horizontally elongate plate which is touchable with a material to be cut, a horizontal elongate plate is fixed to the top end of said vertical elongate plate so as to depress said tappet or projection of said check valve and actuate said micro switch.
  • the vertical elongate rod is so designed as to be brought into and out of contact with the material to be cut in order to automatically determine the upper limit of the vertical movement of the bandsaw blade and automatically control the lowering speed of the band
  • the present invention relates generally to so-called horizontal bandsaw machines in which a cutting head or frame is lowered to cut a material, and pertains more particularly to horizontal bandsaw machines which have been provided with a novel device for automatically minimixing the idling of the bandsaw blade.
  • FIG. I is a front view of a horizontal bandsaw machine embodying the principles of the present invention.
  • FIG. 2 is an enlarged view showing a major portion of the device in accordance with'the present invention.
  • FIG. 3 is a sectional view taken substantially along the line IIIIII of FIG. 2.
  • FIG. 4 is a diagrammatic illustration of the hydraulic components of the bandsaw machine embodying the principles of the present invention, showing the cutting head of the machine as having been raised to its uppermost position.
  • a cutting head or frame 1 enclosing therein a bandsaw blade 3 trained over a driving wheel 5 and a driven wheel 7 is pivotally mounted on a base 9 by means of a hinge pin 11 so as to be swung up and down by a hydraulic cylinder 13 mounted on the base 9.
  • Two saw guide arms 15 and 17 holding saw guides 19 and 21 respectively are slidably mounted on a guide plate 23 horizontally fixed to an upper portion of the cutting head or frame 1 and are tightened by knobs 25 and 27.
  • a vise 29 having vise jaws 29jr and 29jl is mounted on the base 9 to hold a material M to be cut.
  • a control box 31 is mounted on the top of the bandsaw machine to house electric and hydraulic components. As is readily apparent. the bandsaw blade 3 is driven by the driving wheel 5 and lowered together with the cutting head 1 to cut the material M with the guide of the saw guides 19 and 21.
  • the right-hand saw guide arm 15 is provided on its left side with a wide projection 15wp which is formed some distance away from the guide plate 23 as viewed in FIG. 3.
  • a wide projection 15wp which is formed some distance away from the guide plate 23 as viewed in FIG. 3.
  • rollers 33, 35, 37 and 39 On the backside of the wide projection 15wp of the saw guide arm 15 are a plurality of rollers 33, 35, 37 and 39 which are rotatably supported by their respective shafts 33', 35', 37' and 39' secured to the wide projection 15wp.
  • the square rod 41 is provided at its lower end with a horizontally extending angled plate 43, the major portion of which depends behind the bandsaw blade 3 and can extend downwards lower than the bandsaw blade 3 as viewed in FIG. 2.
  • the upper end of the vertical square rod 41 extends into the interior of the control box 31 and can be raised higher than the top of the control box 31 through an opening 310 formed thereon.
  • the vertical square rod 41 is provided at its upper end with a horizontal elongate plate 45 which is engageable with a tappet or projection 47! of a check valve 47 and a micro switch 49, both of which are fixed within the control box 31.
  • the immediately above described check valve 47 is ofthe type which normally allows the hydraulic fluid to flow only in one direction but also allows it to flow in the opposite direction when the tappet or projection 47: is depressed, and it is located in parallel with a flow control valve 51 in a hydraulic passage 53 connecting the hydraulic cylinder 13 with a hydraulic pump 55 which is driven by an electric motor 57 to deliver the hydraulic fluid from a hydraulic tank 59.
  • the flow control valve 51 is used to control the flow of the hydraulic fluid which is drained from the hydraulic cylinder 13 to the hydraulic tank 59 when the bandsaw blade 3 is cutting the material M so that the cutting head 1 holding the bandsaw blade 3 may be lowered at a proper rate according to the cutting requirements of the material M to be cut.
  • a solenoid operated valve 63 having solenoids 65 and 67 is located in the hydrualic passage 53 nearer to the hydraulic pump 55 than the check valve 47 and the flow control valve 51 and it is so designed as to flow the hydraulic fluid towards the hydraulic cylinder 13 when the solenoid 65 is energized to enable the hydraulic fluid to be drained from the cylinder 13 when the solenoid 67 is energized. Also.
  • the micro-switch 49 is electrically connected to the electric motor 57 and the solenoid 65 of the solenoid operated valve 63 through a time limit relay 61 and is so de signed as to de-energize the solenoid 65 and stop the electric motor 57 from operating when it is brought into contact with the upper elongate plate 45 of the vertical elongate rod 41 during the rising ofthe cutting head 1 so as to stop the cutting head l from rising.
  • the numeral 67 designates a relief valve.
  • the cutting head 1 is raised and the material M to be cut is placed on the vise 29 and is clamped by the vise jaws 29jr and 29]].
  • the solenoid 65 is energized in a conventional manner.
  • the cutting head 1 holding the bandsaw blade 3 starts to lower towards the material M to be cut to enable the bandsaw blade 3 to make the cutting operation.
  • the check valve 47 is kept opened. and therefore. the hydraulic fluid from the hydraulic cylinder 13 can pass through the check valve 47 to enable the cutting head 1 and the bandsaw blade 3 to lower quickly.
  • the lower elongate plate 43 since the lower elongate plate 43 has been so designed as to extend downwards lower than the cutting edge of the bandsaw blade 3 as previously described. the lower elongate plate 43 is brought into contact with the material M to be cut earlier than the bandsaw blade 3. Accordingly. when the bandsaw blade 3 is coming into contact with the material M to be cut. the lowering speed of the cutting head 1 has been dropped and therefore the bandsaw blade 3 can cut into the material M slowly at a reduced rate which has been determined according to the cutting requirements of the material M to be cut. so that the bandsaw blade 3 could not be damaged by the material M.
  • the solenoid 65 is energized in a conventional manner as by means of a limit switch to displace the valve 63 rightwards and the electric motor 57 is started also in a conventional manner to drive the hydraulic pump 55.
  • the hydraulic fluid is delivered from the hydraulic tank 59 into the hydraulic cylinder 13 through the check valve 47 and partially the flow control valve 51 so as to raise the cut ting head 1 together with the bandsaw blade 3.
  • the upper elongate plate 45 is contacted by the tappet or projection 47r of the check valve 47 and the micro switch 49 after the bandsaw blade 3 has been brought up higher than the top surface of the material M to be cut. Also. since the time limit switch 61 is provided in connection with the micro switch 49 to delay the action of the latter. the bandsaw blade 3 is stopped at a position a little higher than the top surface of the material M to be cut. Accordingly.
  • the material M to be cut is fed into the cutting position of the bandsaw machine. and thereafter the cycles of the cutting operation are repeated.
  • the horizontal bandsaw machine according to the present invention is so de signed that the cutting head 1 holding the bandsaw blade 3 is automatically raised in each of cutting cycles to a position a little higher than the top surface of the material M to be cut according to the height or diameter of the material M and also that the bandsaw balde 3 held by the cutting head 1 is quickly lowered during its idle time when it is idling without making any cutting operation. Accordingly. the idling ofthe bandsaw blade 3 is most minimized and therefore the bandsaw machine in accordance with the present invention is most efficiently used to make the cutting operation.
  • a bandsaw comprising in combination: a base; a head assembly mounted on said base for movement in relation thereto; a cutting blade and associated drive means carried on said head assembly; elevational means for moving said head assembly in relation to said base between a raised inoperative position at which the cutting blade is spaced above a workpiece positioned on said base.
  • workpiece contacting means carried on said head assembly for movement in relation thereto in a direction transverse to the cutting direction of said cutting blade, the lower end of said contacting means being adapted to contact a workpiece on said base when said head assembly is lowered by said elevational means, the said lower end being normally at a level beneath that of said cutting blade when out of contact with a workpiece; the control means responsive to movement of said work contacting means relative to said head assembly for controlling the operation of said elevational means to lower said head assembly from the raised inoperative position at a rapid rate until the lower end of said contacting means contacts a workpiece on said base. and thereafter to continue lowering said head assembly at a diminished rate throughout the cutting operation.
  • said workpiece contacting means includes an elongated rod mounted on said head assembly for longitudinal movement in relation thereto in a direction transverse to the cutting direction of said cutting blade. said rod having a foot at the lower end thereof positioned to contact a workpiece on said base when the head assembly is lowered by said elevational means.
US367895A 1972-06-07 1973-06-07 Bandsaw Expired - Lifetime US3875839A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972066306U JPS5213027Y2 (ja) 1972-06-07 1972-06-07

Publications (1)

Publication Number Publication Date
US3875839A true US3875839A (en) 1975-04-08

Family

ID=13311982

Family Applications (1)

Application Number Title Priority Date Filing Date
US367895A Expired - Lifetime US3875839A (en) 1972-06-07 1973-06-07 Bandsaw

Country Status (6)

Country Link
US (1) US3875839A (ja)
JP (1) JPS5213027Y2 (ja)
FR (1) FR2187484B1 (ja)
GB (1) GB1433255A (ja)
IT (1) IT986436B (ja)
SU (1) SU543334A3 (ja)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091698A (en) * 1975-09-08 1978-05-30 Western Gear Corporation Rotary cutting blade control system
US4335638A (en) * 1979-09-05 1982-06-22 Gesellschaft Fur Schneidtechnik Mit Beschrankter Haftung Band-saw machine
US4363254A (en) * 1979-12-28 1982-12-14 Amada Company, Limited Horizontal bandsaw machine
US4432260A (en) * 1979-06-11 1984-02-21 Amada Company, Limited Method and apparatus for controlling the feeding of a bandsaw blade of horizontal bandsaw machines
US4454795A (en) * 1982-08-24 1984-06-19 Ellis Wayne S Band saw
US4479410A (en) * 1981-09-11 1984-10-30 Amada Company Limited Method and apparatus for controlling the upper limit of a cutting blade in cutting machines
US4481849A (en) * 1980-09-29 1984-11-13 Amada Company, Limited Horizontal bandsaw machine
GB2161422A (en) * 1984-07-13 1986-01-15 Tsune Seiki Kk Band saw machine
US4766790A (en) * 1984-02-06 1988-08-30 Harris Gerald R Band saw apparatus and method
US5377571A (en) * 1993-10-19 1995-01-03 Josephs; Harold Safety guard system for band saws and similar equipment
CN103920926A (zh) * 2014-03-26 2014-07-16 安徽同曦金鹏铝业有限公司 一种铝型材切割机的切割装置
US20160158857A1 (en) * 2013-08-09 2016-06-09 Amada Holdings Co., Ltd. Horizontal band saw machine
CN107138799A (zh) * 2017-05-23 2017-09-08 李培培 一种便于更换的阀门切割机
CN107234297A (zh) * 2017-05-19 2017-10-10 四川德恩精工科技股份有限公司 一种锥套开槽的方法
US10556279B2 (en) 2015-09-18 2020-02-11 Keuro Besitz Gmbh & Co. Edv-Dienstleistungs Kg Band-saw machine and method for sawing a metal tube
CN111618364A (zh) * 2020-04-20 2020-09-04 浙江奥林发机床有限公司 一种根据材料锯切面自动调节进刀速度的智能调速系统

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60127917A (ja) * 1983-12-14 1985-07-08 Amada Co Ltd 鋸盤における切削制御方法及び装置
DE3621525C2 (de) * 1985-06-29 2003-01-09 Amada Co Schneidvorrichtung
DE102013202754A1 (de) * 2013-02-20 2014-08-21 Hilti Aktiengesellschaft Vorrichtung zum Trennen eines Werkstückes entlang einer Trennlinie
DE102015115820A1 (de) * 2015-09-18 2017-03-23 Keuro Besitz Gmbh & Co. Edv-Dienstleistungs Kg Bandsägemaschine und Verfahren zum Sägen eines Metallrohrs
RU2766617C1 (ru) * 2021-07-16 2022-03-15 Общество с ограниченной ответственностью научно-производственная фирма «ЭЛПА» Устройство для протаскивания ленточного ножа

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721139A (en) * 1970-09-01 1973-03-20 Continental Machines Automatic control for return motion of cutoff saw head

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721139A (en) * 1970-09-01 1973-03-20 Continental Machines Automatic control for return motion of cutoff saw head

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091698A (en) * 1975-09-08 1978-05-30 Western Gear Corporation Rotary cutting blade control system
US4432260A (en) * 1979-06-11 1984-02-21 Amada Company, Limited Method and apparatus for controlling the feeding of a bandsaw blade of horizontal bandsaw machines
US4335638A (en) * 1979-09-05 1982-06-22 Gesellschaft Fur Schneidtechnik Mit Beschrankter Haftung Band-saw machine
US4363254A (en) * 1979-12-28 1982-12-14 Amada Company, Limited Horizontal bandsaw machine
US4481849A (en) * 1980-09-29 1984-11-13 Amada Company, Limited Horizontal bandsaw machine
US4479410A (en) * 1981-09-11 1984-10-30 Amada Company Limited Method and apparatus for controlling the upper limit of a cutting blade in cutting machines
US4454795A (en) * 1982-08-24 1984-06-19 Ellis Wayne S Band saw
US4766790A (en) * 1984-02-06 1988-08-30 Harris Gerald R Band saw apparatus and method
GB2161422A (en) * 1984-07-13 1986-01-15 Tsune Seiki Kk Band saw machine
US5377571A (en) * 1993-10-19 1995-01-03 Josephs; Harold Safety guard system for band saws and similar equipment
US20160158857A1 (en) * 2013-08-09 2016-06-09 Amada Holdings Co., Ltd. Horizontal band saw machine
US9878381B2 (en) * 2013-08-09 2018-01-30 Amada Holdings Co., Ltd. Horizontal band saw machine
CN103920926A (zh) * 2014-03-26 2014-07-16 安徽同曦金鹏铝业有限公司 一种铝型材切割机的切割装置
US10556279B2 (en) 2015-09-18 2020-02-11 Keuro Besitz Gmbh & Co. Edv-Dienstleistungs Kg Band-saw machine and method for sawing a metal tube
CN107234297A (zh) * 2017-05-19 2017-10-10 四川德恩精工科技股份有限公司 一种锥套开槽的方法
CN107138799A (zh) * 2017-05-23 2017-09-08 李培培 一种便于更换的阀门切割机
CN107138799B (zh) * 2017-05-23 2018-11-23 朱德仲 一种便于更换的阀门切割机
CN111618364A (zh) * 2020-04-20 2020-09-04 浙江奥林发机床有限公司 一种根据材料锯切面自动调节进刀速度的智能调速系统

Also Published As

Publication number Publication date
JPS4927092U (ja) 1974-03-08
FR2187484B1 (ja) 1977-09-16
GB1433255A (en) 1976-04-22
JPS5213027Y2 (ja) 1977-03-23
FR2187484A1 (ja) 1974-01-18
IT986436B (it) 1975-01-30
SU543334A3 (ru) 1977-01-15

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