US3455005A - Method of making a metal grating - Google Patents

Method of making a metal grating Download PDF

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Publication number
US3455005A
US3455005A US637163A US3455005DA US3455005A US 3455005 A US3455005 A US 3455005A US 637163 A US637163 A US 637163A US 3455005D A US3455005D A US 3455005DA US 3455005 A US3455005 A US 3455005A
Authority
US
United States
Prior art keywords
cross
stays
bearer bars
portions
grating
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
US637163A
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English (en)
Inventor
Andrew Mentis
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3455005A publication Critical patent/US3455005A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F27/00—Making wire network, i.e. wire nets
    • B21F27/02—Making wire network, i.e. wire nets without additional connecting elements or material at crossings, e.g. connected by knitting
    • 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
    • B21D47/005—Making gratings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F27/00—Making wire network, i.e. wire nets
    • B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/42—Gratings; Grid-like panels
    • E04C2/421—Gratings; Grid-like panels made of bar-like elements, e.g. bars discontinuous in one direction
    • E04C2/422—Gratings; Grid-like panels made of bar-like elements, e.g. bars discontinuous in one direction with continuous bars connecting at crossing points of the grid pattern
    • E04C2/425—Gratings; Grid-like panels made of bar-like elements, e.g. bars discontinuous in one direction with continuous bars connecting at crossing points of the grid pattern made of perforated bars
    • 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
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49616—Structural member making
    • Y10T29/4962—Grille making
    • 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
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body

Definitions

  • This invention relates to gratings of the type used as metal flooring stair treads and the like, and to the method of making such gratings.
  • grating Many forms of grating have been proposed and one form which has recently become generally available utilizes bearer bars supporting cross-stays having a depth approximately twice that of their width. This type of grating generally has the cross-stays secured in slots in the upper edges of the bearer bars and both the notching of the bearer bars and flattening of the rod to form the cross-stays leads to undesirable deformations which must be corrected before satisfactory gratings can be made.
  • a metal grating comprising parallel bearer bars, spaced lines of holes through the bearer bars and adjacent the edges of the bars at one side of the grating, and cross-stays having portions of complementary cross-section to that of the holes located in the latter, and portions of different crosssection extending between the bearer bars.
  • the invention also provides for the portions of the cross-stays between the bearer bars to be of rectangular section with a depth substantially twice the width thereof.
  • FIG. 1 is a plan view partly in section of the grating according to this invention
  • FIG. 2 is a section of the grating on the line A-A in FIG. 1,
  • FIG. 3 is a section of the grating on the line BB in FIG. 1,
  • FIG. 4 illustrates a method of flattening the cross-stays
  • FIG. 5 is a front elevation of the feed roll shown in FIG. 4 and FIG. 6 illustrates the method of rotating the flattened cross-stays through right angles.
  • the grating comprises bearer bars 1 located by cross-stays 2 extending through holes 3 of circular section in the bearer bars.
  • the portions 4 of the cross stays in the holes 3 are of complementary circular cross-section to said holes, while the portions 5 of the cross-stays between the bearer bars are of flattened section.
  • the portions 5 of the cross-stays are generally of rectangular section but with the ends tapering to meet the portions 4.
  • the portions 5 of the cross-stays being of greater height than the diameter of the portions 4 act to locate the bearer bars in spaced relationship, but this location is mainly effected by the swelling of the portions 4 so that they are a tight fit in the holes 3. This is effected automatically by the flattening of portion 5 causing sufiicient metal flow into portions 4 to effect the required location provided the clearances between the holes 3 and crossstays is not too great before the flattening operation.
  • the cross-stays 2 are shown in the drawing with the top edges thereof slightly below the level of the tops of the bearer bars 1. However, the cross-stays may be above or level with the tops of the bearer bars, this being controlled by the location of the holes 3 in the bearer bars and the degree of flattening of the cross-stays.
  • the bearer bars 1 may be about 1 /2" deep and the cross-stays made from A drawn rod which has the portions 5 thereof flattened to a thickness of and a height of To manufacture the grating, the bearer bars 1 are punched at equal spacing to form the holes 3 and rods 6 threaded therethrough by any conventional means to form the basic grid structure 7 shown on the left hand side of FIG. 4.
  • This grid structure 7 is fed between flattening rolls 8 to reduce the rods 6 to an approximately rectangular section having a thickness approximately one half its width. This process locks the cross-stays 2 so formed against transverse movement relative to the bearer bars 1 and makes rotation of the cross-stays very difficult.
  • the grating is preferably formed upside down mainly to assist location of the bearer bars 1 before being locked to the cross-stays.
  • the feeding of the grid structure 7 between the flattening rolls 8 is conveniently elfected by a feed roll 9 having transverse grooves 10 which engage the rods 6 in turn.
  • the feed rolls 9 and flattening rolls 8 have deep circumferential grooves 11 through which the bearer bars 1 extend and are thereby located prior to being locked to the cross-stays 2.
  • the flattening of the cross-stays is a continuous operation and it will be noted from FIG. 4 that they are flattened at right angles to the direction required.
  • the rotation of the cross-stays to the positions shown in FIGS. 1 to 3 is effected in a separate non-continuous operation as shown in FIG. 6.
  • the method enables gratings to be made quickly, economically and with the components in an undistorted condition.
  • a method of making a metal grating comprising forming equally spaced circular holes in elongated bearer bars, locating a plurality of said bearer bars in parallel spaced relationship, threading cross-stays through corresponding holes in the bearer bars, flattening the portions of the cross-stays between the bearer bars in planes extending substantially parallel to the lengths of the bearer bars, and thereafter rotating the flattened cross-stays through approximately 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Textile Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Sewage (AREA)
  • Wire Processing (AREA)
  • Metal Rolling (AREA)
US637163A 1966-05-20 1967-05-09 Method of making a metal grating Expired - Lifetime US3455005A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA662912 1966-05-20

Publications (1)

Publication Number Publication Date
US3455005A true US3455005A (en) 1969-07-15

Family

ID=25560990

Family Applications (1)

Application Number Title Priority Date Filing Date
US637163A Expired - Lifetime US3455005A (en) 1966-05-20 1967-05-09 Method of making a metal grating

Country Status (3)

Country Link
US (1) US3455005A (de)
DE (1) DE1659169A1 (de)
GB (1) GB1142906A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4126980A (en) * 1976-06-19 1978-11-28 Norton Engineering Alloys Company Limited Metal grating
WO1984002551A1 (en) * 1982-12-24 1984-07-05 John Raymond Williams Grid structure
US5133123A (en) * 1988-11-18 1992-07-28 Stewart-Decatur Security Systems, Inc. Security gratings and methods of making bars therefor
US10376946B1 (en) * 2016-05-25 2019-08-13 James E. Ealer, Sr. System and method of making an expanded metal gutter cover having a solid edge margin

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1734660A (en) * 1927-07-30 1929-11-05 New Engineering Construction C Metallic flooring or grating
US1867702A (en) * 1929-09-06 1932-07-19 Arthur E Sangdahl Grating

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1734660A (en) * 1927-07-30 1929-11-05 New Engineering Construction C Metallic flooring or grating
US1867702A (en) * 1929-09-06 1932-07-19 Arthur E Sangdahl Grating

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4126980A (en) * 1976-06-19 1978-11-28 Norton Engineering Alloys Company Limited Metal grating
WO1984002551A1 (en) * 1982-12-24 1984-07-05 John Raymond Williams Grid structure
US5133123A (en) * 1988-11-18 1992-07-28 Stewart-Decatur Security Systems, Inc. Security gratings and methods of making bars therefor
US10376946B1 (en) * 2016-05-25 2019-08-13 James E. Ealer, Sr. System and method of making an expanded metal gutter cover having a solid edge margin

Also Published As

Publication number Publication date
DE1659169A1 (de) 1972-01-13
GB1142906A (en) 1969-02-12

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