US3630067A - Fluid pressure operated head for setting mandrel rivets - Google Patents

Fluid pressure operated head for setting mandrel rivets Download PDF

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Publication number
US3630067A
US3630067A US33273A US3630067DA US3630067A US 3630067 A US3630067 A US 3630067A US 33273 A US33273 A US 33273A US 3630067D A US3630067D A US 3630067DA US 3630067 A US3630067 A US 3630067A
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US
United States
Prior art keywords
mandrel
jaw
jaws
rivet
fluid pressure
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
US33273A
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English (en)
Inventor
James N Henshaw
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Emhart Industries Inc
Original Assignee
USM Corp
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Filing date
Publication date
Application filed by USM Corp filed Critical USM Corp
Application granted granted Critical
Publication of US3630067A publication Critical patent/US3630067A/en
Assigned to EMHART ENTERPRISES CORP. reassignment EMHART ENTERPRISES CORP. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE: MAY 8, 1987 Assignors: USM CORPORATION
Assigned to EMHART INDUSTRIES, INC. reassignment EMHART INDUSTRIES, INC. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: EMHART ENTERPRISES CORP., A NJ CORP.
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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/30—Particular elements, e.g. supports; Suspension equipment specially adapted for portable riveters
    • B21J15/32—Devices for inserting or holding rivets in position with or without feeding arrangements
    • 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
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53709—Overedge assembling means
    • Y10T29/53717—Annular work
    • Y10T29/53726—Annular work with second workpiece inside annular work one workpiece moved to shape the other
    • Y10T29/5373—Annular work with second workpiece inside annular work one workpiece moved to shape the other comprising driver for snap-off-mandrel fastener; e.g., Pop [TM] riveter
    • Y10T29/53739—Pneumatic- or fluid-actuated tool
    • Y10T29/53743—Liquid

Definitions

  • ABSTRACT A fluid pressure operated tool, is disclosed for [52] US. Cl 7222/;7/951l, diafluorous rivets by pulling and breaking their mandrels In into IIIIIIIIIIIIIIIIII n 821! 9/05 addition to including means for ejectmg the spent mandrel B21d3l/06 portion, the rivet head has mechanism for ensuring that us mandrel gripping jaw close prior to exerting substantial man- [50] held of Search 23 32? drel tension, open at the end of the mandrel pulling stroke.
  • Pull-to-set blind rivets commonly include a tubular rivet having a mandrel extending axially therein, the mandrel having an upsetting head larger than the rivet bore and a stem portion which is tensioned axially as the rivet is held against displacement to cause the blind end of the rivet to be upset.
  • an object of this invention to provide an improved head for a riveter adapted to set mandrel rivets, the head to comprise mandrel gripping jaws, and fluid pressure mechanism for controlling the jaws whereby they effectively close at the beginning of a setting stroke and are automatically opened at the end of the stroke to permit rearward ejection of the spent mandrel portion.
  • a further object of this invention is to provide a riveting tool of simple, reliable construction employing fluid pressure mechanism for controlling the relative radial positions of the mandrel pulling jaws at the beginning and end of their operating stroke whereby successive mandrel rivets are cyclically loaded and installed in a rapid manner.
  • a jaw case is axially movable in a riveting body and coupled to an inner sleeve operable by fluid pressure, air pressure constantly urging the sleeve in one direction and hydraulic pressure being applicable in opposing direction to cause the jaws in the case to pull and break the mandrel of a mandrel rivet, the arrangement being such that the jaws, initially open to receive the mandrel, are closed for gripping it before tensioning is exerted and opened at the end of the mandrel pulling stroke to permit mandrel ejection and reloading.
  • FIG. 1 is a view in side elevation of an automatically fed riveting machine, largely corresponding to that disclosed in the cited Henshaw application, in which the riveting head of this invention may be mounted;
  • FIG. 2 is an enlarged view, largely in axial section, of the riveting head in rest position, its jaws being shown open and positioned forwardly;
  • FIG. 3 is a section taken on the line IIIIII of FIG. 2;
  • FIG. 4 is a detail view illustrating the releasable operating connection of a pulling jaw shown in FIGS. 2 and 3, as seen when viewed transversely of the head.
  • the head 14 is reciprocable along a guideway 17 (FIG. 1) by means of a double-acting cylinder 18, the arrangement in the illustrative machine being such that in its lowermost position a stem portion of the mandrel of the mandrel rivet to be upset will extend through an end opening 20 of the nosepiece 16, between three cooperative pulling jaws 22 (FIGS. 2 and 3) mounted as will shortly be explained, and into the front end of a mandrel expulsion tube 24 axially extending rearwardly through the head.
  • the head 14 is coaxially comprised of a partly conical cap 26 threadedly receiving the nosepiece, and a square-sectioned, hollow block portion 28 threadedly secured to the cap 26.
  • the jaws 22 are respectively slidable axially in inclined equispaced bores 30 formed in a jaw case 32.
  • the axes of the cylindrical bores 30 preferably extend about 12 to the longitudinal axis of the head 14, which axis is coincident with that of the opening 20 and a central bore 34 (FIG. 2) of the jaw case 32.
  • Mandrel gripping surfaces 36 of the jaws 22 may be convex and transversely serrated as indicated in FIG. 3.
  • Radially outer or rearward ends of the jaws 22 are T-shaped as shown in FIG. 4 and releasably connected, as by mortise and tenon arrangement, to the forward end of a tubular jaw-controlling member 38 axially shiftable by power mechanism later described.
  • the jaw case 32 is threadedly secured in the front end of a tubular pulling sleeve 40 (FIG. 2) slidably disposed within the member 38 and movable axially with the tube 24.
  • the rear end of the pulling sleeve 40 slidably extends through a sealing ring 42 seated in an end cap 44 threaded into the back end of the block 28.
  • the latter is also, for reasons later explained, formed to threadedly receive a coupling 46 of a hose 48 connected to a source of air under pressure.
  • the rear portion of the expulsion tube 24 extends into the mouth of a venturi tube 50 (FIG. 2) and is received in an adapter 52 one end of which is threaded into the rear end of the sleeve 40.
  • the block 28 is in effect divided into a rear cylinder 54 and a front cylinder 56 by means of a composite seal 58 one face of which abuts an annular shoulder 60 formed in the block 28.
  • a piston 62 in the cylinder 54 is mounted, preferably with a small degree of freedom for compensating movement, on the sleeve 40 and is held against a flange 64 formed thereon by means of a seal 66 and a retainer ring 68 seated in an annular groove formed on the sleeve 40.
  • the axial position of the ring 68 determines the extent to which the jaws 22 can be separated radially for accommodating different mandrel diameters and ensures that hydraulic pressure is operable on a rear face 69 of the member 38 for a purpose later mentioned.
  • an inlet 70 admits hydraulic fluid under pressure via a hose 72 (FIG. 1) connected to a pneumatic intensifier (not shown herein but identified by reference character 168 in the abovecited I-Ienshaw application).
  • a pneumatic intensifier (not shown herein but identified by reference character 168 in the abovecited I-Ienshaw application).
  • the arrangement is such that when a spring-retum valve 73 (FIG. I) in an air exhaust line 75 (designated 174 in the prior Henshaw application) associated with the intensifier is actuated by the downward movement of a setscrew 77 carried by the head 14, which is descending to receive the mandrel to be pulled, hydraulic pressure is thereby admitted into the left-hand chamber of the cylinder 54, as viewed in H6. 2, to force the pulling sleeve 40 rearwardly against the air pressure in the right-hand chamber of the cylinder 54.
  • a piston 76 having sliding engagement with a cylindrical lining 78.
  • the latter has its rear end abutting the seal 58 and its front end disposed against the rear face of a composite seal 80, the front face of which contacts the rear end of the cap 26.
  • the lining 78 serves to substantially equate the diameters of the cylinders 54, 56.
  • the mandrel When the jaws 22 break off and release the rearward or spent mandrel portion at the end of a riveting cycle, the mandrel is caused by a small, continuous stream of air admitted to an inlet 86 (FIG. 2) in the adapter 52 to be carried rearwardly through the tube 24 and a connecting air and mandrel exhaust hose 88. This airflow also assists the head 14, during its advance for receiving the next mandrel rivet presented thereto, to hold the mandrel in a fully retained condition between the open jaws.
  • an inlet 86 FIG. 2
  • This airflow also assists the head 14, during its advance for receiving the next mandrel rivet presented thereto, to hold the mandrel in a fully retained condition between the open jaws.
  • the valve 73 is opened automatically by the screw 77, thereby causing the intensifier to introduce hydraulic fluid into the inlet 70, air being released to atmosphere from the cylinder 56.
  • the hydraulic pressure is effective in front of the piston 62 by action on the rear end face 69 of the jaw-controlling member 38, and hence first causes the latter to move forwardly relative to the sleeve 40. Accordingly the jaws 22 close and grip the mandrel while the case 32 is in its foremost position.
  • the air pressure behind the piston 62 is overcome thereby retracting the pulling sleeve 40 and jaw case 32 along with the expulsion tube 24 and the adapter 52 as the mandrel is tensioned.
  • the grip of the jaws 22 may increase if there is slippage of the jaw case 32 with respect to the jaws but their relative disposition is maintained by reason of their T-slot connection to the member 38.
  • the valve 73 Upon fracture of the mandrel, the valve 73 is automatically reclosed to reverse the flow of hydraulic fluid from the inlet 70 and admit air under line pressure to the cylinder 56 in front of the piston 76. Since the area of the piston 76 subjected to air pressure is considerably greater than the corresponding area 5 of the face 69 of the member 38, the latter relatively retracts on the pulling sleeve 40 before the air pressure behind the piston 62 can overcome the fluid pressure in front of it. Consequently the jaws 22 automatically open to release the spent mandrel stem while the jaw case 32 is in its relatively retracted position. The broken off mandrel portion is thereupon expelled rearwardly through the hose 88 by airflow from the inlet 86. As soon as air pressure rebuilds sufficiently behind the piston 62 the jaws 22 are thereby returned to their open and forward position for receiving another mandrel rivet.
  • a body provided with a mandrel-receiving end for abutting the rivet and fluid pressure mechanism relatively movable axially in the body to tension the mandrel for upsetting the rivet when inserted in a workpiece, said mechanism comprising a jaw case retractable from said body end and having a plurality of guideways disposed at a uniform angle about an axis, mandrel gripping jaws respectively slidable in the guideways, a jaw-controlling member coupled to the jaws to restrain them from displacement relative to one another along the axis, and fluid pressure means for retracting the jaw case to cause the jaws to tension the mandrel, said fluid pressure means being operable on the jaw-controlling member to close the jaws in mandrel gripping relation upon relative movement of the member and the jaw case.
  • a head for setting mandrel rivets comprising a hollow body having a nosepiece for abutting the rivet of a mandrel rivet and receiving its mandrel stem, said body including in coaxial relative sliding relation a tubular jaw holder and a jawcontrolling member, cooperative mandrel gripping jaws within the nosepiece, slidable in the holder, and coupled at their rear ends to the member, piston means respectively operative in spaced cylinder portions of the body and respectively connected to the jaw holder and the jaw-controlling member, and fluid pressure means for actuating the piston means to cause the jaw holder to retract from the nosepiece after closure of the gripping jaws to seize and tension the mandrel, and, before the jaw holder is allowed to return, to relatively return the jawcontrolling member to cause the retracted jaws to release the mandrel.
  • a rivet setting head as set forth in claim 2 wherein an expulsion tube extends axially in the tubular jaw holder rearwardly from said jaws, and pneumatic means operatively connected to said tube is adapted to expel successive spent mandrel stems rearwardly therefrom, said pneumatic means facilitating retention in the nosepiece of mandrel rivets prior to their being gripped by said jaws.
  • a rivet setting head as set forth in claim 2 wherein the rearward ends of each of said jaws has a T-shaped connection with said jaw-controlling member whereby their relative axial disposition is maintained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Jigs For Machine Tools (AREA)
  • Wire Processing (AREA)
US33273A 1969-05-10 1970-04-30 Fluid pressure operated head for setting mandrel rivets Expired - Lifetime US3630067A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2389569 1969-05-10

Publications (1)

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US3630067A true US3630067A (en) 1971-12-28

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Application Number Title Priority Date Filing Date
US33273A Expired - Lifetime US3630067A (en) 1969-05-10 1970-04-30 Fluid pressure operated head for setting mandrel rivets

Country Status (6)

Country Link
US (1) US3630067A (fr)
JP (1) JPS5032475B1 (fr)
DE (1) DE2022894C2 (fr)
FR (1) FR2042546B1 (fr)
GB (1) GB1305389A (fr)
ZA (1) ZA703100B (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886783A (en) * 1974-07-25 1975-06-03 Richard F Hirsch Automatic loading blind riveter
US4130006A (en) * 1976-07-15 1978-12-19 Ebbert Engineering Company Riveting system
FR2439051A1 (fr) * 1978-10-20 1980-05-16 Aerpat Ag Outil a river a rupture de tige avec dispositif d'evacuation
US4259858A (en) * 1979-05-31 1981-04-07 Freeman Richard B Vacuum-pneumatic power tool
US4281531A (en) * 1978-06-24 1981-08-04 Gesipa Blindniettechnik Gmbh Blind riveter with pneumatic rivet-core disposal
US4310056A (en) * 1979-01-15 1982-01-12 Olsson Lars E G Pneumatic-hydraulic tool, preferably for blind riveting
US4754643A (en) * 1987-03-19 1988-07-05 Usm Method and apparatus for automatically installing mandrel rivets
US5351379A (en) * 1993-07-20 1994-10-04 Eric Chu Riveter for efficiently riveting and drafting setting mandrels and scraps
US5960667A (en) * 1997-12-23 1999-10-05 Emhart Inc. Ball device for setting blind riverts
US6079604A (en) * 1998-10-21 2000-06-27 Emhart, Inc. Rivet tool escapement mechanism
US6125680A (en) * 1998-10-21 2000-10-03 Emhart Inc. Rivet tool adjustable rivet delivery device
US6240613B1 (en) 1998-10-21 2001-06-05 Emhart Inc. Rivet setting tool cycle control
US6256854B1 (en) 1998-10-21 2001-07-10 Emhart, Inc. Air assisted fast return stroke for rivet setting tool
US6347449B1 (en) 1998-10-21 2002-02-19 Emhart Inc. Modular portable rivet setting tool
US20080170926A1 (en) * 2007-01-16 2008-07-17 Taylor Harry E Blind rivet

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552010A (en) * 1984-07-09 1985-11-12 Olympic Fastening Systems Pulling head for blind fasteners
US4811881A (en) * 1987-11-20 1989-03-14 Phillips Plastics Corporation Apparatus for supplying and installing plastic expansion rivets

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2088859A (en) * 1935-05-14 1937-08-03 Huxon Holding Corp Riveting machine
GB665207A (en) * 1949-01-15 1952-01-16 British United Shoe Machinery Improvements in or relating to tools adapted for use in blind riveting
GB690174A (en) * 1950-03-16 1953-04-15 British United Shoe Machinery Improvements in or relating to tools adapted for use in blind riveting
US3088618A (en) * 1961-11-21 1963-05-07 United Shoe Machinery Corp Pneumatic rivet setting guns
CH384333A (de) * 1958-10-09 1964-11-15 Adolf Diener App Und Maschb Pneumatisch-hydraulisches Gerät zum Verarbeiten von Blindnieten
US3254522A (en) * 1964-01-29 1966-06-07 United Shoe Machinery Corp Hydraulic pop riveters
US3451248A (en) * 1967-01-26 1969-06-24 Star Expansion Ind Corp Rivet setting tool
US3548627A (en) * 1968-06-20 1970-12-22 Usm Corp Riveting tools

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1410271A (fr) * 1963-08-09 1965-09-10 Blaw Knox Co Amortisseur pour mors de banc d'étirage
FR1537545A (fr) * 1967-09-22 1968-08-23 Tucker Eyelet Co George Matériel de pose de rivets borgnes

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2088859A (en) * 1935-05-14 1937-08-03 Huxon Holding Corp Riveting machine
GB665207A (en) * 1949-01-15 1952-01-16 British United Shoe Machinery Improvements in or relating to tools adapted for use in blind riveting
GB690174A (en) * 1950-03-16 1953-04-15 British United Shoe Machinery Improvements in or relating to tools adapted for use in blind riveting
CH384333A (de) * 1958-10-09 1964-11-15 Adolf Diener App Und Maschb Pneumatisch-hydraulisches Gerät zum Verarbeiten von Blindnieten
US3088618A (en) * 1961-11-21 1963-05-07 United Shoe Machinery Corp Pneumatic rivet setting guns
US3254522A (en) * 1964-01-29 1966-06-07 United Shoe Machinery Corp Hydraulic pop riveters
US3451248A (en) * 1967-01-26 1969-06-24 Star Expansion Ind Corp Rivet setting tool
US3548627A (en) * 1968-06-20 1970-12-22 Usm Corp Riveting tools

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886783A (en) * 1974-07-25 1975-06-03 Richard F Hirsch Automatic loading blind riveter
US4130006A (en) * 1976-07-15 1978-12-19 Ebbert Engineering Company Riveting system
US4281531A (en) * 1978-06-24 1981-08-04 Gesipa Blindniettechnik Gmbh Blind riveter with pneumatic rivet-core disposal
FR2439051A1 (fr) * 1978-10-20 1980-05-16 Aerpat Ag Outil a river a rupture de tige avec dispositif d'evacuation
US4310056A (en) * 1979-01-15 1982-01-12 Olsson Lars E G Pneumatic-hydraulic tool, preferably for blind riveting
USRE31957E (en) * 1979-01-15 1985-07-30 Pneumatic-hydraulic tool, preferably for blind riveting
US4259858A (en) * 1979-05-31 1981-04-07 Freeman Richard B Vacuum-pneumatic power tool
US4754643A (en) * 1987-03-19 1988-07-05 Usm Method and apparatus for automatically installing mandrel rivets
US5351379A (en) * 1993-07-20 1994-10-04 Eric Chu Riveter for efficiently riveting and drafting setting mandrels and scraps
US5960667A (en) * 1997-12-23 1999-10-05 Emhart Inc. Ball device for setting blind riverts
US6079604A (en) * 1998-10-21 2000-06-27 Emhart, Inc. Rivet tool escapement mechanism
US6125680A (en) * 1998-10-21 2000-10-03 Emhart Inc. Rivet tool adjustable rivet delivery device
US6240613B1 (en) 1998-10-21 2001-06-05 Emhart Inc. Rivet setting tool cycle control
US6256854B1 (en) 1998-10-21 2001-07-10 Emhart, Inc. Air assisted fast return stroke for rivet setting tool
US6347449B1 (en) 1998-10-21 2002-02-19 Emhart Inc. Modular portable rivet setting tool
US20080170926A1 (en) * 2007-01-16 2008-07-17 Taylor Harry E Blind rivet
US8449234B2 (en) 2007-01-16 2013-05-28 Harry E. Taylor Blind rivet

Also Published As

Publication number Publication date
JPS5032475B1 (fr) 1975-10-21
DE2022894C2 (de) 1982-06-03
DE2022894A1 (de) 1970-11-19
ZA703100B (en) 1971-10-27
FR2042546B1 (fr) 1974-03-01
GB1305389A (fr) 1973-01-31
FR2042546A1 (fr) 1971-02-12

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Owner name: EMHART INDUSTRIES, INC.,CONNECTICUT

Free format text: MERGER;ASSIGNOR:EMHART ENTERPRISES CORP., A NJ CORP.;REEL/FRAME:004870/0112

Effective date: 19871216

Owner name: EMHART ENTERPRISES CORP.

Free format text: CHANGE OF NAME;ASSIGNOR:USM CORPORATION;REEL/FRAME:004876/0901

Effective date: 19871104

Owner name: EMHART INDUSTRIES, INC., A CONNECTICUT STOCK CORP.

Free format text: MERGER;ASSIGNOR:EMHART ENTERPRISES CORP., A NJ CORP.;REEL/FRAME:004870/0112

Effective date: 19871216

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