US3924434A - Apparatus for shaping hollow metal bodies - Google Patents

Apparatus for shaping hollow metal bodies Download PDF

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Publication number
US3924434A
US3924434A US463915A US46391574A US3924434A US 3924434 A US3924434 A US 3924434A US 463915 A US463915 A US 463915A US 46391574 A US46391574 A US 46391574A US 3924434 A US3924434 A US 3924434A
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US
United States
Prior art keywords
support
mandrel
forming
bore
hollow
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
US463915A
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English (en)
Inventor
Josef Fulier
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.)
VYSKUMNY USTAV MECHANIZACIE A AUTOMATIZACIE
Original Assignee
Vyzk Ustav Mech
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
Priority to GB1507574A priority Critical patent/GB1462429A/en
Priority to NLAANVRAGE7404689,A priority patent/NL173031C/xx
Application filed by Vyzk Ustav Mech filed Critical Vyzk Ustav Mech
Priority to US463915A priority patent/US3924434A/en
Priority to FR7420407A priority patent/FR2274375A1/fr
Application granted granted Critical
Publication of US3924434A publication Critical patent/US3924434A/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
    • 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
    • B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • 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
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/08—Making helical bodies or bodies having parts of helical shape internal screw-threads
    • 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
    • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
    • B21H7/187—Rolling helical or rectilinear grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for 
    • B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for  by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits

Definitions

  • At least two forming bodies located in openings in the wall of the supporting sleeve symlifl E385:JJJJJJJJJJJJJJJJJJJJJ:11:33:13???T 14331; 1213i liiiiiilly will ii iii lilgiililiiil ii iii 58 Field of Search 72/75 224 20s Sleeve-
  • the forming bodies such as freely rotating bans or rollers with their external circumference against a [56] References Cited pressure lelement csuli'roundinfig aft least inbpgrt the supporting s eeve an lasing t e orming o ies against UNITED STATES PATENTS the surface of the hollow body. 629,245 7/1899 Frank 72/75 1,418,697 6/1922 Brinkman 72/75 10 Claims, 5 Drawing Figures US. Patent Dec. 9 1975 3,924,4
  • the present invention relates to an arrangement for shaping hollow metal bodies and particularly for shaping and forming hollow rivets, blind or one-sided rivets and the like.
  • Hollow rivets, particularly blind rivets must be shaped and formed on their external and internal surfaces with grooves, serrations, rachet teeth or the like in order that they assume the proper shape after riveting and in order that they are capable of being grasped by the mandrel of the riveting tool for blind insertion.
  • hollow cylindrical workpieces are shaped after being placed over the pull or tear mandrel of the insertion tool by compressing the rivet between suitable dies. This operation occurs when the mandrel is fixed to the insertion tool and fixes the body into the mandrel.
  • Reference to my copending application Ser. No. 335,747 filed Feb. 26, 1973, now US. Pat. No. 3,838,499, issued Oct. 1, 1974, will show such an arrangement.
  • This procedure has the disadvantage in that the dies needed to compress the rivet while the mandrel is on the forming tool are rather complicated and difficult to manufacture. Furthermore, their maintenance and repair is costly and uneconomical.
  • apparatus for forming hollow rivets and the like from hollow metal bodies comprising a hollow cylindrical support.
  • the support is provided with at least two openings in its wall symmetrically arranged along the longitudinal axis.
  • a freely rotatable forming body is located in each of the openings so as to extend into the bore of the hollow support and outwardly of the external surface of the support.
  • a pressure element is mounted on the support so as to engage the external circumference of the forming body and to urge the forming body radially inward whereby on insertion of a hollow metal workpiece and its supporting mandrel, the forming bodies roll over the external surface of the workpiece and compress the same under pressure of the pressure element against the mandrel.
  • the forming bodies can have the shape of balls or cylindrical rollers suitably held in the openings by either shaping the openings or providing the same with freely rotatable axles.
  • the pressure element can be a sleeve completely surrounding the cylindrical support and being provided with resilient spring means normally biasing the sleeve against movement but permitting movement in a direction opposite to that of the movement of the workpiece when the workpiece is inserted in the apparatus.
  • the pressure element can also be formed as rollers fixed about an axle secured to the cylindrical support and in contact with the forming element.
  • the hollow workpieces can be shaped or reshaped along their longitudinal axis so as to obtain a modification of the profile of its cross section.
  • the apparatus not only shapes the exterior surface but compresses the material against the mandrel holding the workpiece so that the inner surface is also shaped.
  • the present apparatus uses substantially smaller forces than those required for normal die shaping. Another advantage of the present apparatus is that a variety of profiles and the degree of shaping of the internal and external surfaces can be achieved which surpasses that normally obtained by the prior known apparatus.
  • FIG. 1 is a longitudinal sectional view of apparatus for forming hollow rivets embodying the present invention
  • FIG. 2 is a view similar to that of FIG. 1 showing a second embodiment of apparatus of the present invention
  • FIG. 3 is a partial cross sectional end view showing the formation of the workpiece into the shaped rivet by the apparatus of FIG. 1,
  • FIG. 4 is a view similar to that of FIG. 3 showing the formation of the rivet in accordance with the apparatus of FIG. 2, and
  • FIG. 5 is a partial longitudinal sectional view of the hollow workpiece and its supporting mandrel as it is being shaped by the apparatus of either FIG. 1 or 2.
  • FIG. 1 one form of the present invention is shown comprising a hollow cylindrical supporting member 10 having a bore 12.
  • the supporting member 10 is provided with a conical outward flare 14 at its forward end and a radial outwardly directed flange 16 at its other end.
  • the cylindrical support is further provided with a pair of diametrically opposed holes 18 in each of which is located a forming body which in the illustrated embodiment comprises a ball 20.
  • the holes 18 are shaped so as to retain the balls 20 and are arranged symmetrically with respect to the longitudinal axis of the support in a common transverse plane.
  • the diameter of each of the balls 20 is larger than the thickness of the wall of the cylindrical support 10 so that its circumferential surface extends beyond the inner and outer surfaces of the support, i.e., into the bore 12 and beyond the mantel of the support 10.
  • a cylindrical sleeve 22 having a radial outward flange 24 at its rear end surrounds the cylindrical port 10 and extends axially from the flared end 14 into abutment with the flange 16.
  • the sleeve 22 has an inner diameter slightly larger than the outer diameter of the cylindrical support 10 but small enough to engage the circumferential surface of the balls 20 such that it is permitted to slide axially with respect to the support 10 and to simultaneously exert a radial inward pressure on the balls 20.
  • Surrounding the sleeve 22 is a cylindrical cover 26 which'is threaded at its rear end to the flange 16 so as to be maintained in fixed position.
  • the cover 24 is provided with a radially inwardly directed flange 28 at its forward end.
  • a spring 30 Arranged between the flanges 24 of the slidable sleeve 22 and the flange 28 of the cover 26 is a spring 30 which acts to normally bias the slidable sleeve 22 in its rearward direction.
  • a cylindrical hollow workpiece 32 is initially located over a pull or tear mandrel 34 having in the usual manner an inner diameter barely smaller than that of the workpiece and having a contour conforming to the desired shape to be given to the internal surface of the workpiece.
  • the mandrel is formed with a threaded portion 36 and in FIGS. 3 and 4 with special cross sectional shapes.
  • Various contours, shapes and threads may be provided in any desired combination.
  • the workpiece 32 and its mandrel 34 are simultaneously inserted into the front or flared end of the bore '12 and pushed manually or mechanically in the direction of the arrow toward the rear end 16.
  • the balls start to turn and roll over the surface of the workpiece 32 and under the pressure of the pressure sleeve 22 form a longitudinal depression 38 on the outer surface simultaneously upsetting the material of the workpiece ,so that its inner surface is compressed into the shape of the mandrel.
  • the pressure sleeve also begins to move axially in a direction opposite to that of the moving workpiece and against the normal bias of the spring 30.
  • the pressure sleeve 22 will return to its initial starting position as seen in FIG. 1; in the first instance under action of the spring 30, or in the second instance by rolling contact contrary to the movement of the workpiece and combined with the action of the spring. Due to the arrangement of the movable pressure sleeve 22 friction between the balls 20 and the sleeve and/or the workpiece 32 is reduced to a minimum.
  • FIG. 2 a modification of the apparatus according to the present invention is shown in which the pressure element rather than being a sleeve completely surrounding the cylindrical support, comprises a pair of rollers 40 mounted about an axle 42 secured in a bracket 44 fixed to the flange 16 of the support 10.
  • the support being modified only to the extent to accommodate the bracket.
  • the axial length of the support may be chosen as desired in either embodiment.
  • the operation of the apparatus according to FIG. 2 is similar to that described with regard to FIG. 1.
  • the rotating pressure rollers reduce the friction between the forrning bodies and the rollers and because they do not have a finite length as does the pressure sleeve 22 of FIG. 1, hollow metal bodies of longer length may be pulled or pushed through the bore.
  • the rollers 40 have no fixed directional bias and thus workpieces can be pulled or pushed through the apparatus from either the front or its rear ends. Workpieces can furthermore be fed sequentially through the apparatus of FIG. 2 one after the other.
  • the number of forming bodies depend upon the exterior shape which is to be given to the rivet. They may be in any desired number and of any desired diameter. As seen in FIG. 4 the forming bodies may be replaced by cylindrical rollers which provide a flat, rather than an arcuate contour. In the apparatus of FIG. 2, if a small number of forming bodies are to be used, the apparatus may be further modified by utilizing the pressure rollers 40, in the shape of cylindrical rotating rollers as the forming body, thereby eliminating one member of the apparatus. The pressure rollers 40 would then be mounted so as to extend through the openings 18 into contact with the face of the workpiece.
  • the cylindrical support 10 is suitably mounted on a frame or other device, not shown herein.
  • the arrangement according to the present invention is particularly adapted for the formation of hollow metal rivets to conform to the pull or tear mandrel on which they are used. It is however possible to employ the present arrangement in other applications wherein recesses along longitudinal axes of hollow metal bodies have to be formed or where the wall of a hollow metal body should be shaped on its internal surface by means of an inserted mandrel or other inserted die.
  • the present invention can also be used advantageously for the manufacture of a variety of nuts and similar devices each being formed from hollow cylindrical bodies.
  • Apparatus for shaping hollow metal blind rivets comprising a hollow support having a cylindrical bore, at least one radial opening formed in said support, forming elements rotatably arranged in said radial openings and extending into said bore, an elongated mandrel for receiving and axially inserting said rivets within said bore, said mandrel having an outer contour v conforming to the desired shape of said rivet, a'movable pressure element at least partially surrounding said support and engaging the external surfaces of the forming element to conjointly roll therewith and to exert a radially inward force on each movement of said mandrel and rivet through said bore, to cause said forming elements to shape said rivet.
  • the pressure element comprises a sleeve surrounding said support and is provided with resilient means normally biasing said sleeve again st axial movement in one direction the movement of said rivet and mandrel through said bore, overcoming said bias.
  • the apparatus according to claim 4 including means for limiting the axial movement of said sleeve in said one direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Forging (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
US463915A 1974-04-04 1974-04-25 Apparatus for shaping hollow metal bodies Expired - Lifetime US3924434A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB1507574A GB1462429A (en) 1974-04-04 1974-04-04 Apparatus for the shaping of hollow metal bodies
NLAANVRAGE7404689,A NL173031C (nl) 1974-04-04 1974-04-05 Inrichting voor het vervormen van holle metalen lichamen met behulp van rollichamen.
US463915A US3924434A (en) 1974-04-04 1974-04-25 Apparatus for shaping hollow metal bodies
FR7420407A FR2274375A1 (fr) 1974-04-04 1974-06-12 Dispositif pour le formage de corps creux en metal

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB1507574A GB1462429A (en) 1974-04-04 1974-04-04 Apparatus for the shaping of hollow metal bodies
NLAANVRAGE7404689,A NL173031C (nl) 1974-04-04 1974-04-05 Inrichting voor het vervormen van holle metalen lichamen met behulp van rollichamen.
US463915A US3924434A (en) 1974-04-04 1974-04-25 Apparatus for shaping hollow metal bodies
FR7420407A FR2274375A1 (fr) 1974-04-04 1974-06-12 Dispositif pour le formage de corps creux en metal

Publications (1)

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US3924434A true US3924434A (en) 1975-12-09

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US463915A Expired - Lifetime US3924434A (en) 1974-04-04 1974-04-25 Apparatus for shaping hollow metal bodies

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US (1) US3924434A (show.php)
FR (1) FR2274375A1 (show.php)
GB (1) GB1462429A (show.php)
NL (1) NL173031C (show.php)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150555A (en) * 1976-11-18 1979-04-24 Vyskumny Ustav Mechanizacie A Automatizacie Blind riveting unit
US4373366A (en) * 1980-02-19 1983-02-15 Hitachi Cable, Ltd. Machine for forming spiral grooves in metal pipe inner surface
US4649727A (en) * 1984-11-15 1987-03-17 Northrop Corporation Rotary driver and swaging tool
US5115943A (en) * 1988-09-30 1992-05-26 Fabricated Metals, Inc. Bulk material container with a flexible liner
US5384949A (en) * 1993-01-05 1995-01-31 General Motors Corporation Torque transmitting structure and method of manufacture
US5520038A (en) * 1994-07-22 1996-05-28 Seagate Technology, Inc. Device for manufacturing a groove bearing
US5833281A (en) * 1995-06-09 1998-11-10 Hoerbiger Gmbh Fastening structure for a fluid plug-type connector with a connection bore
US5946958A (en) * 1996-04-12 1999-09-07 Seagate Technology, Inc. Device for manufacturing a groove bearing

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482483A1 (fr) * 1980-05-14 1981-11-20 Renault Outil de faconnage par profilage, de cannelures ou de rainures sur des pieces cylindriques en tole
FR2508356A1 (fr) * 1981-06-30 1982-12-31 Sidetol Procede de formage de pieces metalliques et dispositif pour la mise en oeuvre de ce procede
GB9104706D0 (en) * 1991-03-06 1991-04-17 Emhart Inc Production of rivet-nuts
US6000267A (en) * 1997-02-25 1999-12-14 Koyo Seiko Co., Ltd. Process for fabrication of rack shaft and fabrication machine therefor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US629245A (en) * 1898-07-21 1899-07-18 Salomon Frank Apparatus for producing ribbed or corrugated tubes.
US1418697A (en) * 1919-02-11 1922-06-06 Gen Seamless Tube Company Tube and rod tapering
US1919869A (en) * 1932-04-22 1933-07-25 Youngstown Pressed Steel Compa Corrugating apparatus
US1974566A (en) * 1933-01-05 1934-09-25 George K Garrett Forging head
US2371697A (en) * 1943-06-08 1945-03-20 Waltham Watch Co Swaging tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US629245A (en) * 1898-07-21 1899-07-18 Salomon Frank Apparatus for producing ribbed or corrugated tubes.
US1418697A (en) * 1919-02-11 1922-06-06 Gen Seamless Tube Company Tube and rod tapering
US1919869A (en) * 1932-04-22 1933-07-25 Youngstown Pressed Steel Compa Corrugating apparatus
US1974566A (en) * 1933-01-05 1934-09-25 George K Garrett Forging head
US2371697A (en) * 1943-06-08 1945-03-20 Waltham Watch Co Swaging tool

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150555A (en) * 1976-11-18 1979-04-24 Vyskumny Ustav Mechanizacie A Automatizacie Blind riveting unit
US4373366A (en) * 1980-02-19 1983-02-15 Hitachi Cable, Ltd. Machine for forming spiral grooves in metal pipe inner surface
USRE36194E (en) * 1980-02-19 1999-04-27 Hitachi Cable, Ltd. Machine for forming spiral grooves in metal pipe inner surface
US4649727A (en) * 1984-11-15 1987-03-17 Northrop Corporation Rotary driver and swaging tool
US5115943A (en) * 1988-09-30 1992-05-26 Fabricated Metals, Inc. Bulk material container with a flexible liner
US5384949A (en) * 1993-01-05 1995-01-31 General Motors Corporation Torque transmitting structure and method of manufacture
US5520038A (en) * 1994-07-22 1996-05-28 Seagate Technology, Inc. Device for manufacturing a groove bearing
US5833281A (en) * 1995-06-09 1998-11-10 Hoerbiger Gmbh Fastening structure for a fluid plug-type connector with a connection bore
US5946958A (en) * 1996-04-12 1999-09-07 Seagate Technology, Inc. Device for manufacturing a groove bearing

Also Published As

Publication number Publication date
GB1462429A (en) 1977-01-26
NL173031B (nl) 1983-07-01
NL173031C (nl) 1983-12-01
FR2274375B1 (show.php) 1978-06-02
FR2274375A1 (fr) 1976-01-09
NL7404689A (en) 1975-10-07

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