EP0928649B1 - Suction device for holding rivets in a riveting tool - Google Patents

Suction device for holding rivets in a riveting tool Download PDF

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Publication number
EP0928649B1
EP0928649B1 EP19980204028 EP98204028A EP0928649B1 EP 0928649 B1 EP0928649 B1 EP 0928649B1 EP 19980204028 EP19980204028 EP 19980204028 EP 98204028 A EP98204028 A EP 98204028A EP 0928649 B1 EP0928649 B1 EP 0928649B1
Authority
EP
European Patent Office
Prior art keywords
tube
hydraulic piston
piston
hollow
riveting tool
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
EP19980204028
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0928649A3 (en
EP0928649A2 (en
Inventor
Martin Kovar
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.)
Masterfix Products BV
Original Assignee
Masterfix Products BV
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 Masterfix Products BV filed Critical Masterfix Products BV
Publication of EP0928649A2 publication Critical patent/EP0928649A2/en
Publication of EP0928649A3 publication Critical patent/EP0928649A3/en
Application granted granted Critical
Publication of EP0928649B1 publication Critical patent/EP0928649B1/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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • B21J15/04—Riveting hollow rivets mechanically
    • B21J15/043—Riveting hollow rivets mechanically by pulling a mandrel
    • 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
    • B21J15/105—Portable riveters
    • 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
    • B21J15/326—Broken-off mandrel collection

Definitions

  • the invention involves a riveting tool with a device for suctioning rivets, as defined in the pre-characterising portion of claim 1.
  • a riveting tool with a device for suctioning rivets, as defined in the pre-characterising portion of claim 1.
  • Such a tool is known from US 5.500.990.
  • hydraulic-pneumatic riveting tools have a passage opening for transfer of the torn-off pins of blind rivets into the catching box. It sometimes happens, during the operation of the riveting tool, that this passage opening becomes clogged. If the inner rivet suctioning device is firmly connected to some part of the tool, for example to the hydraulic piston or the rear screw joint, it is necessary in the event of such trouble, which commonly occurs, to dismantle the riveting tool in a complicated operation and to unblock or change the part. The operator of the tool is often unable to carry out these repairs himself and specialist repairs are necessary.
  • the riveting tool comprises a hydraulically controlled clamping assembly for rivet pins with collets in which the cylinder of the hydraulic piston is provided with a supply of pressurized air from the lower pneumatic part.
  • the suctioning of the rivets by means of pressurized air serves to hold them in position in the tool thus making it possible to carry out the riveting operation in whatever work position is required.
  • the device for suctioning rivets consists of a tube passing through the axial central passage opening of the hydraulic piston, the back end of which is tightly fitted in the rear screw joint closing off the body of the riveting tool in the part forming the cylinder of the hydraulic piston; into the other forward end of the tube there is pressed a small hollow piston, between whose inner elongated end and the tube there is a ring-shaped space.
  • the tube is provided with at least one opening, connected with the supply of pressurized air.
  • the basis of the invention lies in the fact that the tube has clearance along the whole length of its positioning in the hydraulic piston, where the ring-shaped gap thus created between the tube and the body of the hollow hydraulic piston forms a connection between the radial opening of the tube and the space in the cylinder of the hydraulic piston connected to the supply of pressurized air.
  • the outer shoulder of the small piston with its radial projection reaches the inner shoulder of the hydraulic piston under pressure from the compression spring of the spacing mandrel of the collets.
  • the small piston and the tube are removably located within the axial central passage opening of the hydraulic piston and can be withdrawn therefrom in the event of blockage.
  • the suctioning device is freely positioned as an independent element in the hollow hydraulic piston and is permanently pressed by the spring of the spacing mandrel of the collets against the inner shoulder of the hydraulic piston.
  • the replacement of the suctioning device is simple and does not call for expert intervention by a specialized workshop or the manufacturer of the riveting device.
  • the tube has preferably an inner conical recess, narrowing in the direction of the back end of the riveting tool, into which the elongated end of the small piston, whose outer surface is also conical, is partly inserted, so that a suction nozzle is formed. Pressurized air is directed by the nozzle to the space between the elongated end of the small piston and the adjacent inner conical recess of the tube. In that space there is thus effectively created sub-atmospheric pressure which causes air to be drawn, through the inner axial opening in the small piston, from the front part of the riveting tool, into which the blind rivet is inserted.
  • the small hollow piston can have at its front end a conical widening of its axial opening, which serves as the entry point for the torn-off pins of the blind rivets.
  • the seal of the small piston for its positioning in the hollow hydraulic piston, is generally formed by means of an O-ring in the hollow hydraulic piston, which obstructs the entrance of air to other parts of the riveting tool.
  • Figure 1 shows a section of the device for suctioning rivets in the upper part of the riveting tool
  • Figure 2 shows in detailed section the arrangement of the tube, into the forward end of which is pressed the small hollow piston, between whose inner elongated end and the tube there is a ring-shaped space. In that area the tube has a radial opening (connected with the supply of pressurized air).
  • a hydraulically controlled clamping assembly for rivet pins, with collets 11 .
  • the cylinder 18 of the hydraulic piston 2 is provided with a supply of pressurized air from the lower pneumatic part of the tool.
  • a tube 4 passes through the axial central passage opening of the hydraulic piston 2 , the back end 23 of which is tightly fitted (by means of a tight rubber O-ring 24 ) in the hollow rear screw joint 15 closing off the body 1 of the riveting tool in the part forming the cylinder 18 of the hydraulic piston 2 .
  • a small hollow piston 3 between whose inner elongated end 25 and the tube 4 there is a ring-shaped space 17 .
  • the tube 4 is provided with an opening 5 , connected with the supply of pressurized air.
  • the tube 4 has clearance along the whole length of its positioning in the hydraulic piston 2 .
  • the ring-shaped gap 27 thus created between the tube 4 and the body of the hollow hydraulic piston 2 forms a connection between the radial opening 5 of the tube 4 and the space 6 in the cylinder 18 of the hydraulic piston 2 connected to the supply of pressurized air.
  • the outer shoulder 7 of the small piston 3 lies closely adjacent (due to its seal 21 ) to the surface of the central passage opening in the hydraulic piston 2 .
  • the seal 21 of the small piston 3 for its positioning in the hollow hydraulic piston 2 , is formed by means of a rubber O-ring in the hollow hydraulic piston 2 .
  • the front surface of the spacing mandrel 13 is shaped according to the slant of the collets 11 around it, the two being freely inserted in the casing 26 of the collets screwed to the hydraulic piston 2 .
  • This whole clamping arrangement for rivet pins is placed in the front hose 14 , which is screwed to the hydraulic piston 2 .
  • An interchangeable extension 10 according to the size of the diameters of the rivet pins, is screwed to the forward wall of the front hose 14 and serves to convey the rivet pins.
  • the tube 4 has an inner conical recess 12 , narrowing in the direction of the back end of the riveting tool.
  • the elongated end 25 of the small piston 3 whose outer surface is also conical, is partly inserted into it, so that a suction nozzle 19 is formed.
  • the small hollow piston 3 has, at its forward end, a conical widening 28 of its axial opening facilitating improved suctioning of the air into the small hollow piston 3 .
  • Pressurized air from the pneumatic part of the riveting tool is brought through channels (not illustrated) to the space 6 in the cylinder 18 of the hydraulic piston 2 beyond the hydraulic piston 2 (on the outer surface of the suctioning system). From here the pressurized air is directed along the outer casing of the tube 4 through the ring-shaped gap 27 between the tube 4 and the body of the hollow hydraulic piston 2 (which forms a connection between the radial opening 5 of the tube 4 and the space 6 in the cylinder 18 of the hydraulic piston 2 , connected with the supply of pressurized air) to the radial opening 5 in the tube 4. The pressurized air goes through the opening 5 to the ring-shaped space 17 between the tube 4 and the small piston 3 and is directed to the suction nozzle 19 .
  • the suctioning system (the piston 3 with the tube 4 ) is freely placed as an independent element in the hollow hydraulic piston 2 and is permanently pressed against the inner shoulder 29 of the hydraulic piston 2 by the compression spring 9 of the spacing mandrel 13 of the collets 11 .
  • the back end 23 of the tube 4 is led through the inner opening 16 of the back screw joint 15 .
  • the invention can be used in pneumatic hydraulic riveting tools with suctioning of blind rivets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
EP19980204028 1998-01-02 1998-11-30 Suction device for holding rivets in a riveting tool Expired - Lifetime EP0928649B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ753898 1998-01-02
CZ19987538U CZ7414U1 (cs) 1998-01-02 1998-01-02 Zařízení pro přisávání nýtů nýtovacího nástroje

Publications (3)

Publication Number Publication Date
EP0928649A2 EP0928649A2 (en) 1999-07-14
EP0928649A3 EP0928649A3 (en) 2000-03-15
EP0928649B1 true EP0928649B1 (en) 2003-06-11

Family

ID=5468543

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980204028 Expired - Lifetime EP0928649B1 (en) 1998-01-02 1998-11-30 Suction device for holding rivets in a riveting tool

Country Status (2)

Country Link
EP (1) EP0928649B1 (cs)
CZ (1) CZ7414U1 (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11654475B2 (en) 2020-06-03 2023-05-23 Milwaukee Electric Tool Corporation Rivet setting tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101224486B (zh) * 2008-01-25 2010-10-06 孙延新 拉铆枪的拉铆装置
CN111069516B (zh) * 2018-10-18 2021-11-02 南宁富桂精密工业有限公司 拉铆枪

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2116102A (en) * 1982-03-08 1983-09-21 Avdel Ltd Riveting tool
CZ114193A3 (en) * 1993-06-11 1995-01-18 Josef Wihan Rivetting tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11654475B2 (en) 2020-06-03 2023-05-23 Milwaukee Electric Tool Corporation Rivet setting tool

Also Published As

Publication number Publication date
CZ7414U1 (cs) 1998-06-01
EP0928649A3 (en) 2000-03-15
EP0928649A2 (en) 1999-07-14

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