US20070271982A1 - Metal spinning machine - Google Patents

Metal spinning machine Download PDF

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Publication number
US20070271982A1
US20070271982A1 US11/693,195 US69319507A US2007271982A1 US 20070271982 A1 US20070271982 A1 US 20070271982A1 US 69319507 A US69319507 A US 69319507A US 2007271982 A1 US2007271982 A1 US 2007271982A1
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US
United States
Prior art keywords
roller tool
target position
workpiece
operator command
spinning machine
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.)
Abandoned
Application number
US11/693,195
Other languages
English (en)
Inventor
Hirohiko Arai
Shozo Fujimura
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.)
National Institute of Advanced Industrial Science and Technology AIST
Daitoh Spinning Co Ltd
Original Assignee
National Institute of Advanced Industrial Science and Technology AIST
Daitoh Spinning 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 National Institute of Advanced Industrial Science and Technology AIST, Daitoh Spinning Co Ltd filed Critical National Institute of Advanced Industrial Science and Technology AIST
Assigned to NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, DAITOH SPINNING CO. LTD. reassignment NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ARAI, HIROHIKO, FUJIMURA, SHOZO
Publication of US20070271982A1 publication Critical patent/US20070271982A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/18—Spinning using tools guided to produce the required profile
    • B21D22/185—Spinning using tools guided to produce the required profile making domed objects

Definitions

  • This invention relates to a metal spinning machine and more particularly to a metal spinning machine of the teaching playback system.
  • Metal spinning is a plastic forming process that executes forming by attaching a plate or pipe blank workpiece to a mandrel, spinning the workpiece in conjunction with the mandrel and pressing the workpiece with a roller tool against the mandrel.
  • This forming process is widely used, as a method for forming products having a metal used as a raw material, for the production of parts and products, such as domestic containers, decorative craftworks, lighting fixtures, boilers, tanks, nozzles, engine parts, parabolic antennas and tire wheels.
  • a metal spinning machine comprises a main shaft for spinning the mandrel and the workpiece and a plurality of mutually intersecting linear actuators for pressing the workpiece against the mandrel by driving the roller tool.
  • hydraulic cylinders or ball screw mechanisms that are rotationally driven by servomotors have been used as linear actuators for driving the roller tool.
  • the teaching playback method that, besides resorting to the ordinary numerical control operated by having position coordinates input in numerical values, requires the operator to perform actual forming by manually operating the roller tool with an operating lever, playback an operator command memorized in the meantime and cause the subsequent forming to be actuated by the operator command has been widely used. While the multi-pass metal spinning that gradually deforms a workpiece attaches importance to the trajectory of the roller tool based on the experience and the skill of a skilled operator, the teaching playback method enables this important trajectory to be easily reflected in automatic production.
  • the teaching playback method enables easy realization of an adequate clearance because the gauging is implemented at the time of teaching.
  • the conventional metal spinning machine that drives the roller tool with a hydraulic mechanism entails labor hour in coping with the fluid resistance in the piping system for hydraulic fluid, righting the responsibility of the valve and further maintaining the management of the hydraulic fluid and tends toward suffering the characteristic properties to succumb to the influences of the temperature change. It also has been at a disadvantage in threatening environmental pollution by leakage of hydraulic fluid and inviting restriction on the location of installation.
  • the ball screw mechanism when used, the force control with sufficient responsibility has not been easily realized because of the frictional resistance and the backlash of the screw mechanism, the elasticity of the joint between the driving motor and the ball screw and the like.
  • This invention has been accomplished in view of the true state of affairs mentioned above and is aimed at providing a metal spinning machine of the teaching playback system that, in spite of the use of an electric actuator capable of easy handling, enables the teaching operations to be performed without inducing the possibility of causing breakage due to overload even when the roller tool and the mandrel interfere with each other.
  • the present invention provides as the first aspect thereof a metal spinning machine comprising a mandrel kept in rotation, a roller tool with which a plate blank workpiece is pressed against the mandrel form the workpiece, linear motors that generate thrust force in proportion to driving electrical current and drive the roller tool, an operating lever that gives an operator command to the linear motors and a control unit that includes a memory, wherein manual operation of the roller tool with the operating lever by an operator receiving a teaching of the operator command forms the workpiece in a prescribed shape, and the memory of the control unit stores the operator command that is then given to the linear motor to enable a same shape to be subsequently formed relative to plate blank workpieces repeatedly.
  • the second aspect of the invention includes the metal spinning machine of the first aspect, wherein the operator command indicates a target position of the roller tool obtained by integrating a speed input to the linear motor in proportion to an angle of the operating lever, and the driving electrical current of the linear motor is decided based on feedback of a variation between a current position and the target position of the roller tool.
  • the third aspect of the invention includes the metal spinning machine of the second aspect, wherein for each movement of the target position of the roller tool over more than a fixed distance during the teaching of the operator command, the target position and a time of that instant are stored in the memory and a correspondence between the target position and a time of passage is variable at a time of playback.
  • This invention is configured as described above and enabled to manifest the effect that will be described below.
  • the linear motors used therein are capable of generating thrust force in proportion to driving electrical current and causing the generated thrust force to be exerted directly on the object being driven without the intervention of a transmission mechanism, such as ball screws. Since the machine possesses no sliding part, the frictional resistance is suffered to emanate solely from the linear bearing in the linear guide mechanism and, therefore, the loss of thrust force caused by friction is small. Thus, it is rendered possible to configure a forming machine of the teaching playback system that has no possibility of suffering the overload to inflict breakage on the transmission mechanism.
  • the metal spinning machine adapted to perform forming a plate blank workpiece by pressing the workpiece with a roller tool against a mandrel kept in rotation is provided with linear motors that generate thrust force in proportion to driving electrical current and drive the roller tool, an operating lever that gives an operator command to the linear motors and a control unit that includes a memory. Therefore, the operator is allowed, on receiving a teaching of the operator command, to form a workpiece in a prescribed shape by manually operating the roller tool with the operating lever, cause an operator command to be stored in the meantime in the memory of the control unit and enable the same shape to be subsequently formed relative to plate blank workpieces repeatedly by giving the operator command stored in the memory to the linear motor.
  • This machine enables easier handling as in maintenance than when hydraulic cylinders are used and obviates the necessity of providing a means to prevent excessive forming force. Even when the roller tool interferes with the mandrel, the teaching operation for the spinning can be executed without possibly inducing breakage due to overload as experienced in the ball screw mechanism.
  • this invention enables the motion of the roller tool to be played back nearly as faithfully as in the case of teaching even in the presence of disturbance, such as friction because the operator command pertains to the target position of the roller tool obtained by integrating the speed input to the linear motors in proportion to the angle of the operating lever, and the driving electrical current of the linear motor is decided based on the feedback of the difference between the current position of the roller tool and the target position.
  • This invention enables storage of teaching data in a small memory capacity even when the teaching takes time and allows reduction of the forming time during the course of playback because in the metal spinning machine, for each movement of the target position of the roller tool over more than a fixed distance during the teaching of the operator command, the target position and the time of that instant are stored in the memory and the correspondence between the target position and the time of passage is variable at the time of playback.
  • FIG. 1 is a schematic view illustrating one example of the metal spinning machine contemplated by this invention.
  • FIG. 2( a ) is an explanatory view illustrating the outline of the control in the teaching mode of the metal spinning machine of FIG. 1 .
  • FIG. 2( b ) is an explanatory view illustrating the outline of the control in the playback mode of the metal spinning machine of FIG. 1 .
  • FIG. 3 is an explanatory view illustrating the concept of the target position in the teaching data of the metal spinning machine of FIG. 1 .
  • the object of executing a teaching operation without either using hydraulic mechanisms or possibly inducing breakage due to overload even in the presence of interference between the roller tool and the mandrel is realized by a forming device that is provided with linear motors generating thrust force in proportion to driving electrical current, an operating lever serving to give an operator command to the linear motors and a control unit including a memory and consequently, on receiving a teaching, is enabled to store the operator command in the memory and thereafter causes the operator command stored in the memory to be played back with the linear motors.
  • FIG. 1 is a schematic view of the metal spinning machine of this invention.
  • a workpiece 1 is centered on a mandrel 3 with a tail stock 2 and made by a main shaft motor 4 to rotate together with the mandrel 3 .
  • a roller tool 5 is made to progress or regress in the radial direction (y-direction) of the mandrel 3 by a linear table 7 driven by a linear motor 6 composed of a stator 6 a and a moving element 6 b .
  • the linear table 7 is made to progress or regress in the direction of the rotation axis (x-direction) of the mandrel 3 by a linear table 9 driven by a linear motor 8 composed of a stator 8 a and a moving element 8 b .
  • the workpiece 1 is pressed with the roller tool 5 against the mandrel 3 and transformed from a flat plate 1 a in the initial shape finally to a shape 1 b conforming to the mandrel 3 .
  • An operating lever 10 is provided with a built-in potentiometer and enabled to enter voltage signals of speed inputs proportionate respectively to the inclinations of the lever in the x-direction and the y-direction into the A/D converters 12 x and 12 y of a computer (control unit) 11 .
  • the electrical current commands directed toward linear motors are output into servo amplifiers 14 x and 14 y via D/A converters 13 x and 13 y and made to generate driving electrical currents to the linear motors 6 and 8 .
  • the linear motors 6 and 8 are provided with position sensors, such as encoders, capable of detecting the positions of the moving elements 6 b and 8 b and the resultant position signals are entered in a counter 15 .
  • a CPU 16 of the computer (control unit) 11 brings in the relevant signals via the A/D converter 12 x and 12 y and the counter 15 , carries out a computer processing for the sake of control, induces production of control signals from the D/A converters 13 x and 13 y to the servo amplifiers 14 x and 14 y and stores an operator command in a memory 17 .
  • FIG. 2 A conceptual diagram of the control contemplated by this invention is illustrated in FIG. 2 .
  • a speed input (Vx, Vy) proportionate to the angle of the lever are generated.
  • the electrical current commands to the servo amplifier 14 are determined by calculating the difference ( ⁇ x, ⁇ y) between the target position (xd, yd) of the roller tool obtained by integrating the speed input (Vx, Vy) with an integrator and the current positions x and y of the roller tool input from the counter 15 and applying a position control rule, such as the proportional-plus-derivation control, thereto.
  • the target positions (xd, xy) of the roller tool stored in the memory 17 are sequentially extracted as operator commands and input in the position control side similarly to the teaching mode of FIG. 2( a ).
  • the roller tool is capable of playing back the same motion as the motion taught by the operator and forming the workpiece in the same shape.
  • the operator commands happen to be stored as electrical current commands to the servo amplifier or the speed commands of the roller tool in the memory 17 , the accumulation of control errors as due to friction possibly prevents the same motion from being necessarily played back as in the case of teaching.
  • the motion of the roller tool nearly equal to the motion brought by teaching can be faithfully played back even in the presence of disturbance due to friction because the disturbance is compensated by the position control rule and the roller tool is made to stop near the target position.
  • the target position and the time of that instant are stored ( FIG. 3 ).
  • (x ⁇ x n ⁇ 1 ) 2 +(y ⁇ y n ⁇ 1 ) 2 ⁇ d 2 wherein (x n ⁇ 1 , y n ⁇ 1 ) denotes the target position stored last and (x, y) denotes the current target position of the roller tool, (x, y) is stored as the next target position (x n , y n ).
  • the time of that instant is stored as Tn. The distance between the adjacent target positions so stored is approximately “d.”
  • the mode of motion of the roller tool becomes completely equal to that acquired by the playback.
  • the correspondence between the target position (x n , y n ) and the time of elapse may be varied.
  • the target position (x n , y n ) is followed at the intervals of a fixed length, n ⁇ T, in the place of Tn, for example, the target positions are fated to move at a fixed speed d/ ⁇ . By doing so, it is rendered possible to eliminate the time during which the roller tool remains stopped and reduce the forming time during the course of playback.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US11/693,195 2006-05-23 2007-03-29 Metal spinning machine Abandoned US20070271982A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006142216A JP2007313510A (ja) 2006-05-23 2006-05-23 スピニング加工装置
JP2006-142216 2006-05-23

Publications (1)

Publication Number Publication Date
US20070271982A1 true US20070271982A1 (en) 2007-11-29

Family

ID=38622425

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/693,195 Abandoned US20070271982A1 (en) 2006-05-23 2007-03-29 Metal spinning machine

Country Status (3)

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US (1) US20070271982A1 (de)
JP (1) JP2007313510A (de)
DE (1) DE102007015294A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090126443A1 (en) * 2004-08-06 2009-05-21 Fontijne Grotnes B.V. Method and apparatus for manufacturing a rim bed by means of cold forming
CN103240319A (zh) * 2013-05-21 2013-08-14 中国兵器工业集团第五五研究所 录返旋压机芯模数据的采集装置
GB2537750A (en) * 2015-04-19 2016-10-26 Keith Deans Terence Tooling system for and method of manufacturing decorating nozzles
WO2019048358A1 (en) * 2017-09-05 2019-03-14 Nissan Motor Manufacturing (Uk) Ltd TOOL PATH GENERATING METHOD FOR ROTATION FORMATION PROCESS
CN111872206A (zh) * 2020-07-13 2020-11-03 燕山大学 脉冲电流辅助旋压成型装置及旋压成型方法
CN113560413A (zh) * 2021-07-21 2021-10-29 深圳市威纳盛五金工艺品有限公司 一种金属工艺品加工用旋压装置及方法
CN113798381A (zh) * 2021-09-03 2021-12-17 中材科技（苏州）有限公司 一种高压氢气瓶铝内胆的旋压成型装置及其成型方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4602425B2 (ja) * 2008-02-06 2010-12-22 日本スピンドル製造株式会社 絞り加工装置及び絞り加工方法
JP5376526B2 (ja) * 2010-03-17 2013-12-25 独立行政法人産業技術総合研究所 スピニング加工方法及び装置
KR200461590Y1 (ko) 2012-02-10 2012-07-23 윤미정 관부재 단부 성형장치
CN106493211B (zh) * 2017-01-10 2018-02-27 佛山市南海田旋机械科技有限公司 旋压机
CN109201831B (zh) * 2017-07-25 2019-06-11 中国航空制造技术研究院 一种大型旋压机床同步旋压控制的方法
CN108555103A (zh) * 2018-01-09 2018-09-21 南京航空航天大学 协同自阻电加热的板材自增量旋压成形装置及方法
CN112404228B (zh) * 2020-11-26 2023-05-12 首都航天机械有限公司 一种用于贮箱箱底整体旋压成形工艺装备

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US3823591A (en) * 1971-11-15 1974-07-16 Leifeld & Co Method and apparatus for producing dish-shaped articles
US4976126A (en) * 1989-08-02 1990-12-11 Kabushiki Kaisha Yamamoto Kinzoku Seisakusho Spinning machine
US5355705A (en) * 1990-05-04 1994-10-18 Eckehart Schulze Process for controlling the revolving path motions of the spinning roller of a spinning lathe, and spinning lathe for performing the process
US5587633A (en) * 1995-02-23 1996-12-24 Mitsubishi Denki Kabushiki Kaisha Press control method and press apparatus
US5775151A (en) * 1995-07-20 1998-07-07 Masse; Johan Method and apparatus for spinning a metal sheet
US5901595A (en) * 1996-06-24 1999-05-11 Massee; Johan Apparatus for machining a workpiece
US5960661A (en) * 1997-02-20 1999-10-05 Massee; Johan Apparatus for working a workpiece
US7131304B2 (en) * 2004-01-30 2006-11-07 National Institute Of Advanced Industrial Science And Technology Spinning method and apparatus

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JPS5622003B2 (de) * 1972-06-30 1981-05-22
JPS51137267A (en) * 1975-05-23 1976-11-27 Kobe Steel Ltd System for controlling a speed of an industrial robot
JPS56132606A (en) * 1980-03-24 1981-10-17 Hitachi Ltd Method and device for instructing
JPS6368226A (ja) * 1986-09-08 1988-03-28 Nippon Spindle Mfg Co Ltd スピニングマシンの駆動装置
JPH01113129A (ja) * 1987-10-23 1989-05-01 Yamamoto Kinzoku Seisakusho:Kk スピニング加工機
JP3732355B2 (ja) * 1999-04-28 2006-01-05 株式会社ソディック プレス機械

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823591A (en) * 1971-11-15 1974-07-16 Leifeld & Co Method and apparatus for producing dish-shaped articles
US4976126A (en) * 1989-08-02 1990-12-11 Kabushiki Kaisha Yamamoto Kinzoku Seisakusho Spinning machine
US5355705A (en) * 1990-05-04 1994-10-18 Eckehart Schulze Process for controlling the revolving path motions of the spinning roller of a spinning lathe, and spinning lathe for performing the process
US5587633A (en) * 1995-02-23 1996-12-24 Mitsubishi Denki Kabushiki Kaisha Press control method and press apparatus
US5775151A (en) * 1995-07-20 1998-07-07 Masse; Johan Method and apparatus for spinning a metal sheet
US5901595A (en) * 1996-06-24 1999-05-11 Massee; Johan Apparatus for machining a workpiece
US5960661A (en) * 1997-02-20 1999-10-05 Massee; Johan Apparatus for working a workpiece
US7131304B2 (en) * 2004-01-30 2006-11-07 National Institute Of Advanced Industrial Science And Technology Spinning method and apparatus

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090126443A1 (en) * 2004-08-06 2009-05-21 Fontijne Grotnes B.V. Method and apparatus for manufacturing a rim bed by means of cold forming
CN103240319A (zh) * 2013-05-21 2013-08-14 中国兵器工业集团第五五研究所 录返旋压机芯模数据的采集装置
GB2537750A (en) * 2015-04-19 2016-10-26 Keith Deans Terence Tooling system for and method of manufacturing decorating nozzles
GB2537750B (en) * 2015-04-19 2021-04-21 Keith Deans Terence Tooling system for and method of manufacturing decorating nozzles
WO2019048358A1 (en) * 2017-09-05 2019-03-14 Nissan Motor Manufacturing (Uk) Ltd TOOL PATH GENERATING METHOD FOR ROTATION FORMATION PROCESS
GB2568857A (en) * 2017-09-05 2019-06-05 Nissan Motor Mfg Uk Ltd Method of toolpath generation for a spin forming process
GB2568857B (en) * 2017-09-05 2020-12-30 Nissan Motor Mfg Uk Ltd Method of toolpath generation for a spin forming process
CN111872206A (zh) * 2020-07-13 2020-11-03 燕山大学 脉冲电流辅助旋压成型装置及旋压成型方法
CN113560413A (zh) * 2021-07-21 2021-10-29 深圳市威纳盛五金工艺品有限公司 一种金属工艺品加工用旋压装置及方法
CN113798381A (zh) * 2021-09-03 2021-12-17 中材科技（苏州）有限公司 一种高压氢气瓶铝内胆的旋压成型装置及其成型方法

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Publication number Publication date
JP2007313510A (ja) 2007-12-06
DE102007015294A1 (de) 2007-11-29

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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ARAI, HIROHIKO;FUJIMURA, SHOZO;REEL/FRAME:019438/0553

Effective date: 20070412

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