US3851362A - Expanded mesh - Google Patents

Expanded mesh Download PDF

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Publication number
US3851362A
US3851362A US00389954A US38995473A US3851362A US 3851362 A US3851362 A US 3851362A US 00389954 A US00389954 A US 00389954A US 38995473 A US38995473 A US 38995473A US 3851362 A US3851362 A US 3851362A
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US
United States
Prior art keywords
hooks
slots
slotting
another
rows
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
US00389954A
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English (en)
Inventor
H Jury
R Howells
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.)
Comalco J&S Pty Ltd
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Comalco J&S Pty Ltd
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00—Fencing, e.g. fences, enclosures, corrals
    • E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
    • 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
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
    • B21D31/046—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal making use of rotating cutters
    • 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
    • B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
    • 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
    • Y10T29/00—Metal working
    • Y10T29/18—Expanded metal making

Definitions

  • ABSTRACT forming an extrusion having a constant cross-sectional shape which includes webs separated by ribs, forming rows in its slots in the webs which overlap one another and are staggered, increasing the width of each slot of the two outermost rows of slots by bending the ribs, engaging the widened slots over the hooks of two rows of books of an expanding machine, separating the rows of hooks from one another so as-to bend the ribs and expand the slotted extrusion without applying any torsion to the ribs, and at the same time move the hooks in each row towards one another, and then removing the expanded mesh from the hooks.
  • corrugated portions extending across the bars or strips, the extra length required in the expansion of the material was provided'by the flattening of the corrugations. With this arrangement the length of the expanded product was substantially the same as thelength of the unexpanded product.
  • the main object of the invention is to provide a methodof forming an expanded mesh which will be much more suited to production techniques than either' of the above proposals and therefore results in a low cost expanded mesh.
  • a second object is to provide a method whereby expanded meshes of different configurations can be quickly and easily formed in expanding means with a minimum of set up time.
  • a still further object of the invention is to provide a method which is particularly suitable for non-corrosive metals.
  • a method of forming expanded mesh in this invention comprises:
  • a slotting machine having aseries of slotting rollers on a slotting roller shaft is also provided with a spreader finger shaft having at least one pair of spreader fingers which are radially outstanding therefrom and which are aligned with the respective outermost 'slotting rollers, the spreader finger shaft being driven along with the slotting roller shaft and arranged so that the spreader fingers are driven into the slots of the respective outermost rows of slots to thereby effect the increasing of slot width as the workpiece passes through the slotting machine.
  • a slotting machine which can be readily modified for use with this invention is described in our copending Australian Pat. application No. 57895/73.
  • the slots are formed by a series of axially spaced slotting rollers carried on a slotting roller shaft which'is journalled in bearings in the frame of the slotting machine, the machine-also having a spreader finger shaft which is journalled in bearings in said frame and parallel to the slotting roller shaft and has a pair of radially outstanding spreader fingers thereon which are aligned with respective outermost slotting rollers, the method further comprising simultaneously:
  • FIG. 1 is a cross-section of an extrusion having a constant cross-sectional shape
  • FIG. 2 is a plan of the extrusion illustrated in FIG. 1,
  • FIG. 3 is a cross-section of the extrusion after having been slotted but before the outermost rows of slots are widened
  • FIG. 4 is a plan of the slotted extrusion illustrated in FIG. 3,
  • FIG. 5 is a plan similar to FIG. 4 but illustrating the shapes of the outermost rows of slots after they have been widened
  • FIG. 6 is a diagrammatic representation of a slotting machine which is provided with means for widening the outermost rows of slots,
  • FIG. 7 is a perspective view which illustrates the configuration of the slotting roller
  • FIG. 8 is a section through a slotting machine which is provided with spreading fingers
  • FIG. 9 is an enlarged elevational view of a spreading finger carrier with spreading fingers thereon
  • FIG. 10 is a section taken on line 10-10 of FIG. 9,
  • FIG. I] is a section taken on line ll-ll of FIG. 9,
  • FIG. 12 is a fragmentary view of portion of an expanding machine showing means utilised to correctly locate the hooks of a row of hooks relative to one another,
  • FIG. 13 is a diagrammatic plan illustrating the workpiece of FIG. 5 when engaged on the hooks of a metal expanding machine, but before expansion of the workpiece,
  • FIG. 14 is a fragmentary diagrammatic plan illustrating the configuration of the workpiece after expansion and the arrangement of the hooks
  • FIG. 15 is a plan of portion of one expansion rail of an expanding machine and the position of the hook carriage as relative to one another after expansion has taken place, and
  • FIG. 16 is a section taken on line 16-l6 of FIG. 15 but drawn to an enlarged scale.
  • FIG. 1 illustrates an extrusion 20 of ductile and extrusile metal, in this embodiment being of aluminium alloy, and being provided with a plurality of ribs 21 which are separated by webs 22.
  • the workpiece is shown as slotted with a series of slots designated 24, each web 22 containing a row of slots, and in this embodiment each row has its slots overlapping the slots of the or each adjacent row as the case may be, and being staggered with respect thereto.
  • the slots of each row of slots have their adjacent ends close to one another being separated by only a short length ofweb 22 in each instance.
  • FIG. 5 it willbe seen that the outermost rows of slots 24 have been widened by bending of the outermost rib 21 in each case.
  • FIG. 6 illustrates diagrammatically a slotting machine
  • FIG. 8 is a section through the slotting head thereof.
  • FIG. 7 illustrates the slotted roller arrangement.
  • a driving chain 27 is provided with a plurality of outstanding dogs 28 which are arranged to drive a workpiece extrusion 20 in a longitudinal direction past a series of slotting rollers 29.
  • each slotting roller 29 is provided with a pair of diametrically opposite recesses 30 having between them radially outstanding and circumferentially extending projections 31 which, as shown in FIG. 8, effect the formation of slots in the workpiece.
  • the slotting rollers 29 are separated from one another by circular packers 33 (FIG.
  • a spreader head 40 is secured to the frame of the slotting machine, being spaced on the outside of the slotted rollers 29.
  • the spreader head 40 carries on it a pair of bearings (not shown) but which are adjustable by means of a screw jack 41 to adjust the height of the bearings, and the bearings journal a spreader finger shaft 42.
  • the height adjustment of the slotting roller shaft 36 is effected by a second screw jack 43 in the slotting roller head 44.
  • a driving chain 46 extends between the shafts 36 and 42 so that the slotting roller shaft 36 and the spreader finger shaft 42 rotate at identical speeds. Provision is made however for the varying of the distances between the shafts, so that the spreader head can be adjusted to have its spreader fingers 47 exactly synchronized with the slotting rollers so as to enter the slots formed in a workpiece.
  • FIGS. 9, l0 and 11 illustrate the features of a spreader head having two diametrically opposite spreader fingers 47.
  • the number of spreader fingers should be identical with the number of radially outstanding projections 31 when the shafts 36 and 42 are driven at the same speed. However, the number may be varied, and in order to accommodate variation of numbers, the spreader fingers 47 are secured with bolts 50 the heads of which engage in an annular T slot 51 which extends around a face of a spreader finger carrier 52 which is keyed to the spreader finger shaft 42 as shown in FIG. 8.
  • the spreader finger carrier 52 is slidable on the shaft 42, but is provided with screw threaded members 53 enabling it to be secured in any position which is required for the spreader fingers 47 to be aligned with the respective outermost row of slots 24 in the workpiece.
  • each spreader finger 47 is of general rectangular shape but is provided with sloping surfaces 55 which enable the finger to enter the slots 24 of the respective outermost rows.
  • the workpiece After the workpiece has been slotted and after the outermost rows of slots have been widened, the workpiece is driven by the dogs 28 of the chain 27 onto the discharge side support roll case 56.
  • FIGS. 12, 13', l4, l and 16 illustrate some details of a metal expanding machine which is described in greater detail in our co-pending AustralianPat. application No. P.B. 197.
  • the machine is provided with side rails 60 which are movable apartfrom one another by means best illustrated in ourco-pending application, each side rail 60 carrying on it a track 61 which is engaged by rollers 62 on carriage blocks 63.
  • Each carriage block 63 has secured to it a workpiece engaging hook 65 which is best illustrated in FIG. 16, and the carriage blocks are interconnected by a flexible line66 which, when taut, approximately positions the hooks which engage over the hooks as the member 67 is swung downwardly and accurately locate the hooks. When the hooks have been so located, the workpiece is placed on them, whereupon the swinging gauge member 67 is removed.
  • the detailed construction of this mechanism is described in the said Australian application P.B. 197.
  • the side rails 60 are moved away from one another (if desired one of the two may be fixed) and the workpiece is expanded by bending of the metal strips between adjacentslots, as illustrated in FIGS. 14 and 15. In this expansion, a minimum of stretching takes place and the carriage blocks 63 move toward one another until they finally abut one another. This ensures that the module remains unaltered for the whole of the length of the workpiece, andif desired a slight degree of stretching can be imparted to remove any irregularities after the carriage blocks 63 have abutted one another.
  • This invention results in anew product, namely a mesh wherein the ribs have substantially identical cross-section for the whole of their lengths, wherein there has been little or no strain imparted into the ribs,
  • the invention then makes possible products of a wide range of shape which can be aesthetically pleasing, since the cross-sectional shape of the ribs themselves can be varied.
  • the method makes it possible to form a workpiece with only three operator handling stations, one at the extrusion stage (FIG. 1) one at the slotting and widening stage (FIG. 5) and one at the final expansion stage (FIG. 14). It will therefore be seen that the product can be of very low cost, and that the method is inherently so versatile that the low cost can be maintained even when production runs are short.
  • a method of forming expanded mesh comprising;
  • extruding extrusile material to form an extrusion having a constant cross-sectional shape which includes ribs separated by webs
  • slots are formed by a series of axially spaced slotting rollers carried on and keyed to a slotting roller shaft which is journalled in bearings in the frame of a slotting machine, said machine also having a spreader finger shaft journalled in bearings in said frame and being parallel to the slotting roller shaft, and having a pair of radially outstanding spreader fingers thereon, the method fur ther comprising simultaneously:
  • a method according to claim 2 further comprising adjusting the spreader fingers on the spreader finger shaft to align them with the respective outermost of said slotting rollers on the slotting roller shaft.
  • said expanding machine comprises a pair of side rails each having a trackextending along it, and the books of each said row are each carried on a carriage block having rollers thereon which engage and are supported by a said track, the carriage blocks of each row being interconnected by'a flexible line, the method further comprising drawing the lines taut to thereby separate the carriage blocks from one another before engaging the hooks in said respective widened slots.
  • a method according to claim 2 wherein said expanding machine comprises a pair of side rails, each side rail having a swinging gauge member hinged thereto, the gauge member having cut-outs therein, a track extending along each side rail, a plurality of carriage blocks each having rollers thereon which engage and are supported by a said track, each said hook being on a respective carriage block, the carriage blocks of each row being interconnected by a flexible line, the method further comprising:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US00389954A 1972-08-23 1973-08-20 Expanded mesh Expired - Lifetime US3851362A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPB018572 1972-08-23

Publications (1)

Publication Number Publication Date
US3851362A true US3851362A (en) 1974-12-03

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Application Number Title Priority Date Filing Date
US00389954A Expired - Lifetime US3851362A (en) 1972-08-23 1973-08-20 Expanded mesh

Country Status (9)

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US (1) US3851362A (it)
AU (1) AU469862B2 (it)
CA (1) CA991027A (it)
DE (1) DE2342308C3 (it)
FR (1) FR2196862B1 (it)
GB (1) GB1431457A (it)
HK (1) HK30078A (it)
IT (1) IT998432B (it)
ZA (1) ZA735585B (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396685A (en) * 1980-11-13 1983-08-02 Ampliform Pty. Limited Fabricated expanded metal
AT404102B (de) * 1993-02-18 1998-08-25 Avi Alpenlaendische Vered Drahtgitterbahn und verfahren zu deren herstellung

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534943A1 (de) * 1974-08-20 1976-03-25 Gordon Francis Leiblich Strukturelles flaechengebilde, insbesondere eine bewehrungsmatte
US4526347A (en) * 1981-06-09 1985-07-02 Institute For Industrial Research And Standards Fence assembly
AU568646B2 (en) * 1983-05-12 1988-01-07 Ampliform Pty. Limited Manufacturing expanded metal sheet
WO1985002567A1 (en) * 1983-12-05 1985-06-20 Glamagard Pty. Limited Expanding machine
AU580714B2 (en) * 1986-06-20 1989-01-27 Expamet Pty Limited Method and apparatus for producing expanded products
AU607333B2 (en) * 1988-05-17 1991-02-28 Ronald E. Graham (Holdings) Pty. Limited Manufacturing expanded metal mesh
DE10027010C2 (de) * 2000-05-31 2002-06-27 Wilhelm Roettger Verfahren zur Herstellung eines Streckgitters sowie ein mit diesem Verfahren hergestelltes Streckgitter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US885158A (en) * 1907-10-24 1908-04-21 Trussed Concrete Steel Co Expanded metal.
US1103033A (en) * 1906-01-12 1914-07-14 Nat Metal Fabric Company Apparatus for manufacturing expanded metal.
US1231888A (en) * 1913-08-29 1917-07-03 South Side Trust Company Method of expanding stranded sheet metal.
US3591351A (en) * 1967-11-30 1971-07-06 Inland Steel Co Reticulated structure and method of manufacture

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1363666A (en) * 1970-07-16 1974-08-14 Jury & Spiers Pty Ltd Means and method for producing expanded metal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1103033A (en) * 1906-01-12 1914-07-14 Nat Metal Fabric Company Apparatus for manufacturing expanded metal.
US885158A (en) * 1907-10-24 1908-04-21 Trussed Concrete Steel Co Expanded metal.
US1231888A (en) * 1913-08-29 1917-07-03 South Side Trust Company Method of expanding stranded sheet metal.
US3591351A (en) * 1967-11-30 1971-07-06 Inland Steel Co Reticulated structure and method of manufacture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396685A (en) * 1980-11-13 1983-08-02 Ampliform Pty. Limited Fabricated expanded metal
AT404102B (de) * 1993-02-18 1998-08-25 Avi Alpenlaendische Vered Drahtgitterbahn und verfahren zu deren herstellung

Also Published As

Publication number Publication date
CA991027A (en) 1976-06-15
DE2342308A1 (de) 1974-02-28
AU5953673A (en) 1975-02-27
HK30078A (en) 1978-06-23
FR2196862B1 (it) 1979-09-28
IT998432B (it) 1976-01-20
DE2342308B2 (de) 1979-04-12
GB1431457A (en) 1976-04-07
FR2196862A1 (it) 1974-03-22
AU469862B2 (en) 1976-02-26
DE2342308C3 (de) 1979-12-06
ZA735585B (en) 1975-02-26

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