US3792602A - Apparatus for forming plates of irregular shape in cross-section - Google Patents

Apparatus for forming plates of irregular shape in cross-section Download PDF

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Publication number
US3792602A
US3792602A US00284869A US3792602DA US3792602A US 3792602 A US3792602 A US 3792602A US 00284869 A US00284869 A US 00284869A US 3792602D A US3792602D A US 3792602DA US 3792602 A US3792602 A US 3792602A
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United States
Prior art keywords
plate
pressure roller
die
surface portion
plate material
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Expired - Lifetime
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US00284869A
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English (en)
Inventor
H Fukuda
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.)
KAWAI GOKKI SEISAKUSHO KK
Kk Kawai Gokki Seisakusho ja
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KAWAI GOKKI SEISAKUSHO KK
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/0805—Flat bars, i.e. having a substantially rectangular cross-section
    • 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons

Definitions

  • the invention relates to methods and apparatus for forming plates of irregular shape in section and which have a small-thickness portion and a large-thickness portion, the plates being formed out of a comparatively thick plate material.
  • the invention relates more particularly to methods and apparatus for forming parts such as contact members for connectors, contact members for relays, terminal members for wrapping connections, reeds for musical instruments and the like.
  • the material to be used for making the above types of products must be a material having a comparatively high elasticity such as copper alloys including, for example, phosphor bronze, brass or copper nickel alloy, nickel silver, stainless steel or the like.
  • the rolling process is a process in which a plate material is passed between rolls for being extended in the longitudinal direction thereof. This process is defective in that the extension of the plate material in its width direction is very small. Accordingly, when the center portion thereof is intended to be made thin, there is a limit to the thinning of that portion and there is brought about a waving phenomenon if a certain limit is exceeded. Further, the material can be broken if it is thinned out.
  • the material is fed to a rotating or stationary cutter to be cut thereby.
  • This process is defective in that there is brought about a waste of material by the cutting. Further, continuous cutting for materials of great length cannot be achieved.
  • This invention has for an object the provision of an apparatus free from the foregoing defects.
  • the invention is characterized in that, opposite to a plate surface of a plate-form die which issharpened at its front end portion, there is provided a pressure roller which rolls within a range corresponding to the plate surface of the die for pressing a plate material placed on the plate surface. At the completion of each pressing action of the pressure roller, the plate material is moved by a predetermined length rearwards from the front end portion of the plate-form die.
  • FIG. 1 is a generalized top plan view of one embodiment of this invention
  • FIG. 2 is a side elevational view of the same
  • FIG. 3 is a sectional view taken along line III III in FIG. 1;
  • FIG. 4 is a sectional view taken along line IV IV in FIG. 1;
  • FIG. 5 is a side view of a more specific embodiment of this invention.
  • FIG. 6 is a top plan view as seen from Y in FIG. 5;
  • FIG. 7 is a top plan view as seen from Z in FIG. 5;
  • FIG. 8 is a sectional view taken along line VIII VIII in FIG. 6;
  • FIG. 9 is a top plan view of a flat plate-form of die of a different type.
  • FIG. 10 is a sectional view taken along line X X in FIG. 9;
  • FIG. 11 is a perspective view of a product obtained by a die of this type.
  • FIG. 12 is a top plan view of a flat plate-form die of another different type
  • FIG. 13 is a sectional view taken along line XIII XIII in FIG. 12;
  • FIG. 14 is a perspective view of a product obtained by the die of this type.
  • component I is a flat plate-form die which is sharpened at its front end] portion 1a to have an acute angle.
  • a plate material a is put at its one end portion on the upper surface of the plate-form die 1.
  • a pressure roller 2 which rolls within the range extending from the front end of the flat die 1 to the rear end thereof is provided opposite the die I. It is arranged that the plate material a is repeatedly moved by a predetermined length S rearwards from the wedgeshaped front or leading end portion 1a of the die 1 after each completion of a reciprocating movement of the roller, for example, from a position A to a position B and back to the position A while pushing the plate material a against the flat plate-form die I.
  • the plate material a is gradually squeezed by the die 1 from its sharpened front end portion la to the maximum width of the rear end lb thereof, so that the center portion of the material a can be formed with a portion of small thickness, that is, a thinner portion, and thereby a long piece of irregular sectional shape as shown in FIG. 4 can be obtained.
  • the plate of irregular shape in section b thus obtained is further applied to a rolling machine (not shown) for being formed into a desired txickness.
  • the resultant piece is then properly cut to length to obtain products such as contact members or terminal members or the like each having a portion of small thickness and a portion of large thickness.
  • the plate-form die 1 is only sharpened at its leading or front end portion.
  • the small thickness portion of the material a can be damaged or broken by the influence of the opposite side edges of the sharpened portion 1a. Therefore these edges must be formed into slanted surfaces lc (slanted at an angle hereinafter called the angle of reliefB) as illustrated in FIG. 3.
  • the tip of the sharpened portion In is thus naturally formed into a knife edge by this angle of relief B.
  • the small thickness portion of the material a can also be damaged by a corner resulting between the inclination of the tip end and the plate surface of the die 1. Therefore, the same portion must be chamfered as at 111.
  • This chamfered portion 1d may be either a plane surface or a curved surface.
  • the plate-form die 1 is provided with a broad width portion 1e extending rearwardly from the rear end lb of the sharpened portion la and having the same width as the maximum width thereof.
  • the portion 1e should extend over a length corresponding to the length of travel of the material a for each step thereof.
  • a plate of irregular sectional shape b can be moved in a straight line by being guided by this broad width portion 1e.
  • a plate material a of brass (copper 70% zinc 30%) of 2.0 mms. in thickness and 50 mms. in width is formed at its center portion with a small thickness portion of 30 mms. in width
  • the minimum thickness obtainable with different angles of relief [3 is 0.42 mm. at 15, 0.59 mm. at 30 and 0.79 mm. at 45.
  • a plate of irregular sectional shape can thus be easily rolled by a rolling machine, whereby the small thickness portion thereof is made to be 0.1 0.15 mm. and the large thickness portion thereof is made to be about 0.45 mm.
  • contact members for a relay for example, can be obtained therefrom.
  • the pressure roller 2 is not limited to a reciprocating movement from the postion A but can have a reciprocating movement from the position B. It is preferable that, at the time of movement of the plate form material a, the pressing action by the pressure roll 2 be released, however the material a can also be moved without being released.
  • FIG. shows a specified embodiment whereby a plate of irregular sectional shape and of great length can be continuously formed.
  • the pressure roller 2 is rotatably supported on a machine frame 5 provided reciprocably on a machine base 3 by rollers 4.
  • the machine frame 5 is connected through a crank 6 to a rotary disk 8 rotated by a prime mover 7.
  • the plate-form die 1 has a pressing apparatus 9 thereon provided just above the pressure roller 2 so as to face the same.
  • the plate material a which is of long size is pulled out from a winding frame 10 and is passed between the pressure roller 2 and the plate form of die 1.
  • the plate material is connected at its front portion to a winding frame 11.
  • Component 12 is a clamp-type travelling apparatus for intermittently moving the plate material a by a predetermined length S. It comprises as shown in FIGS. 5 and 6, a slidable frame 13, a L-shaped swingable arm 16 which is in contact at it's one end with the periphery of a cam plate 14 that is arranged to rotate with the reciprocating movement of the machine frame 5 carrying the pressure roller 2. It is provided at its other end with a pressure plate 15 and a receiving plate 17 formed integrally with the slidable frame 13 on the upper surface of the material a so as to be aligned with the pressure plate 15.
  • Component 18 is a spring which pulls the slidable frame 13 toward the retreating side and component 16' is a roller provided on one end portion of the L-shaped swingable arm 16.
  • the pressing apparatus 9 comprises, as shown clearly in FIGS. 5 and 7, a pair ofwedge members 19 provided on the rear surface, that is, the upper surface of the plate-form die 1. These wedge members 19 are each in threaded engagement at the corresponding base end portion with a threaded rod 20.
  • a gear 21 mounted on the base portion of each rod 20 is in mesh with a gear 23 which is rotated by a handle 22 so that, by rotating the handle 22, the rods 20 are rotated and the wedge members 19 are advanced or pulled back whereby the pushing force exerted on the plate-form die 1 can be adjusted.
  • Component 24 is a holding rod for the die 1. it comprises a threaded portion 24a on the tip end thereof which is screwed into a base plate 26 which is integral with the plate-form die 1.
  • Component 27 are fixing devices for the plate material a provided on the front and rear sides of the location of the die 1 and the pressure roller 2. These devices each comprise a receiving plate 28 provided on the lower surface of the flat plate material a and a pres sure plate 31 provided on the tip end of a piston rod 30 of a fluid pressure cylinder 29. On rolling of the pressure roller 2, the piston rod 30 is lowered to the pressure plate 31 to fix the plate material a but, on advancing of the material a, the pressing action of the piston rod 30 thereon is released.
  • component 32 is a prime mover for driving the wind ing frame 11. It is so arranged as to drive on movement of the clamp-type travelling apparatus 12 so that the length of the material a travelled by the apparatus 12 can be taken up on the winding frame 11.
  • Component 33 is a pulley provided ona driving shaft 34 for the rotary disk 8. The pulley is connected to the prime mover 7 through a belt 35.
  • Part 1f denotes a concavity made in the rear surface of the broad width portion 12 located just above the rear end portion of the die 1. It is so arranged that the pressure roller 2 is located thereon when it completes its reciprocating movement, whereby the pushing action of the roller 2 on the material a may be released. As a result, the movement of the plate material a is facilitated.
  • the pressure roller 2 is moved to the left through the crank 6 and is moved to the right after is reaches a position which is a little ahead of the sharpened front end of portion 1a of the plate-form die 1.
  • the cam plate 14 starts pushing the roller 16.
  • the L-shaped swingable arm 16 is inclined thereby and the pressure plate 15 is elevated so that the plate material a is clamped between the same and the receiving plate 17. Under these conditions, the pressure roller 2 is located below the concavity If so that movement of the plate material a is easily effected.
  • FIGS. 9 and 10 show a pair of plate-form dies 1 with a space L therebetween.
  • Each die 1 is cut at its outer side so as to be sharpened at its front end portion.
  • This die arrangement there is obtained a plate of irregular sectional shape from the plate material a such that its center portion is formed into a large thickness portion of width L. Its opposite sides are formed into small thickness portions as illustrated in FIG. 11.
  • the plate thus obtained is then also subjected to rolling to obtain a product of a predetermined thickness.
  • the resultant strip is then properly cut to produce terminal members, contact members, reeds or the like which are different in form from the above described ones.
  • FIGS. 12 and 13 show further another embodiment wherein a plate-form die 1 similar to that shown in FIG. 1 is formed to have two steps paced one upon the other. With this die, there can be obtained a plate of irregular sectional shape such that the small thickness portions are formed into two steps as shown in FIG. 14. This is also rolled and then cut for obtaining terminal members or the like which are different in form from the above described ones.
  • plate material is thinned out by being gradually squeezed by the sharpened portion of a plate-form die.
  • the resultant product is neither wavey not broken even if the same is further rolled. Thereby, a desired thickness can be obtained. Additionally, continuous working for plate material of great length can be carried out.
  • the apparatus is simple in construction and can be economically obtained.
  • An apparatus for forming a plate of irregular sectional shape comprising a plate-form die including a plate surface portion sharpened at a leading end por tion, a pressure roller, means for moving said roller reciprocably within a range corresponding to said plate surface portion for the pressing of a plate material placed on the plate surface portion of the die against said surface portion and means-for moving the plate material, after each reciprocable movement of the pressure roller, through a predetermined distance rearwardly from the leading end portion of the die.
  • Apparatus as claimed in claim 1 comprising pressing means for applying adjustable: pressure above the pressure roller, said means for moving the plate material including a clamp-type travelling means operable at each completion of a reciprocating movement of the pressure roller, such that the plate material is passed through between the pressure roller and the plate-form die by a predetermined length.
  • Apparatus as claimed in claim 4 comprising a machine frame for supporting the pressure roller, a machine base, rollers for supporting said frame on said base, a crank connected to the machine frame, and a rotary disk for driving said crank.
  • An apparatus as claimed in claim 5 comprising a cam on said disk, an L-shaped swingable arm having one end engaged with said cam and including at a second end a pressure plate adapted for being moved by movement of the swingable arm caused by the cam to clamp the plate material.
  • said plate-form die includes a multi-step plate surface portion each step of which includes a leading end portion.
  • said plate-form die includes at least two laterally spaced parts separated by a groove.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Forging (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US00284869A 1972-08-19 1972-08-30 Apparatus for forming plates of irregular shape in cross-section Expired - Lifetime US3792602A (en)

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Application Number Priority Date Filing Date Title
JP47082465A JPS5236512B2 (xx) 1972-08-19 1972-08-19

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4345358A (en) * 1980-02-11 1982-08-24 Dmetrios Petkidis Method of and apparatus for manufacturing plowshares
US4528836A (en) * 1981-10-30 1985-07-16 Durand Texte Gerard Process for changing the cross-section of a band of malleable material such as copper
FR2597768A1 (fr) * 1986-04-23 1987-10-30 Kawai Musical Instr Mfg Co Appareil pour fabriquer une tole de section de forme irreguliere
EP0259479A1 (en) * 1986-03-12 1988-03-16 Donn Inc STRUCTURES FORMED BY COLD LAMINATION, DEVICE AND METHOD FOR PRODUCING THE SAME.
JPS63502733A (ja) * 1986-03-12 1988-10-13 ドン　インコ−ポレイテッド 常温圧延金属成形物及びその成形方法並びにその成形装置
US4857412A (en) * 1986-01-16 1989-08-15 Paul Fleury Method for forming a planar sheet or plate to a curved shape
US5600995A (en) * 1995-06-07 1997-02-11 Sherman; Alden O. Useful improvements in press apparatus
EP1170072A1 (en) * 2000-07-04 2002-01-09 Shinichiro Nakayama Method of shaping a metal rod material
US8245550B2 (en) * 2011-01-07 2012-08-21 Samuel P Willits Apparatus for providing a rolling action of a curved tool along a flat stationary substrate

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5856921B2 (ja) * 1975-07-29 1983-12-17 株式会社河合楽器製作所 フクゴウザイノセイゾウホウホウ
JPS5478355A (en) * 1977-12-05 1979-06-22 Furukawa Electric Co Ltd:The Manufacture of deformed section bar
JPS6241029U (xx) * 1985-08-26 1987-03-11
JPS62254946A (ja) * 1986-04-30 1987-11-06 Kawai Musical Instr Mfg Co Ltd 両面異形断面板の製造装置
KR20110013406A (ko) * 2008-05-23 2011-02-09 미츠비시 신도 가부시키가이샤 이형 단면조의 제조방법

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US731769A (en) * 1902-07-28 1903-06-23 John A Harper Rolling-press.
US1725594A (en) * 1926-12-01 1929-08-20 Walter H Montgomery Metal-tapering machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US731769A (en) * 1902-07-28 1903-06-23 John A Harper Rolling-press.
US1725594A (en) * 1926-12-01 1929-08-20 Walter H Montgomery Metal-tapering machine

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4345358A (en) * 1980-02-11 1982-08-24 Dmetrios Petkidis Method of and apparatus for manufacturing plowshares
US4528836A (en) * 1981-10-30 1985-07-16 Durand Texte Gerard Process for changing the cross-section of a band of malleable material such as copper
US4857412A (en) * 1986-01-16 1989-08-15 Paul Fleury Method for forming a planar sheet or plate to a curved shape
EP0259479A4 (en) * 1986-03-12 1990-01-23 Donn Inc COLD-ROLLED STRUCTURES, METHOD AND APPARATUS FOR PRODUCING THE SAME.
JPS63502733A (ja) * 1986-03-12 1988-10-13 ドン　インコ−ポレイテッド 常温圧延金属成形物及びその成形方法並びにその成形装置
EP0259479A1 (en) * 1986-03-12 1988-03-16 Donn Inc STRUCTURES FORMED BY COLD LAMINATION, DEVICE AND METHOD FOR PRODUCING THE SAME.
JP2853123B2 (ja) 1986-03-12 1999-02-03 ドン インコ−ポレイテッド 常温圧延金属成形物及びその成形方法並びにその成形装置
FR2597768A1 (fr) * 1986-04-23 1987-10-30 Kawai Musical Instr Mfg Co Appareil pour fabriquer une tole de section de forme irreguliere
US5025650A (en) * 1986-04-23 1991-06-25 Kabushiki Kaisha Kawai Gakki Seisakusho Apparatus for forming plates of irregular cross-sectional shape
US5600995A (en) * 1995-06-07 1997-02-11 Sherman; Alden O. Useful improvements in press apparatus
EP1170072A1 (en) * 2000-07-04 2002-01-09 Shinichiro Nakayama Method of shaping a metal rod material
US6536092B2 (en) 2000-07-04 2003-03-25 Shinichiro Nakayama Plastic processing method of metal rod material
US8245550B2 (en) * 2011-01-07 2012-08-21 Samuel P Willits Apparatus for providing a rolling action of a curved tool along a flat stationary substrate

Also Published As

Publication number Publication date
JPS5236512B2 (xx) 1977-09-16
JPS4938862A (xx) 1974-04-11

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