EP0928649A2 - Suction device for holding rivets in a riveting tool - Google Patents
Suction device for holding rivets in a riveting tool Download PDFInfo
- Publication number
- EP0928649A2 EP0928649A2 EP98204028A EP98204028A EP0928649A2 EP 0928649 A2 EP0928649 A2 EP 0928649A2 EP 98204028 A EP98204028 A EP 98204028A EP 98204028 A EP98204028 A EP 98204028A EP 0928649 A2 EP0928649 A2 EP 0928649A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- hydraulic piston
- piston
- riveting tool
- small
- 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.)
- Granted
Links
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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 device for suctioning rivets in a riveting tool.
- 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 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)
Abstract
Description
- The invention involves a device for suctioning rivets in a riveting tool.
- At the present time 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 above defects are eliminated by the arrangement of the tool for suctioning of rivets in a riveting tool according to this invention.
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. In this area 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. At the same time, 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.
Furthermore, 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.
During blockage of the passage channel for pins of torn-off blind rivets in the area of the suctioning device, the operator of the riveting tool can easily replace the blocked part himself. 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 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.
- The invention can be explained in greater detail by means of the attached drawings. Figure 1 shows a section of the device for suctioning rivets in the upper part of the riveting tool and 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).
- In the upper part of the
body 1 of the riveting tool there is a hydraulically controlled clamping assembly for rivet pins, withcollets 11 . Thecylinder 18 of thehydraulic piston 2 is provided with a supply of pressurized air from the lower pneumatic part of the tool. Atube 4 passes through the axial central passage opening of thehydraulic piston 2, the back end 23 of which is tightly fitted (by means of a tight rubber O-ring 24 ) in the hollowrear screw joint 15 closing off thebody 1 of the riveting tool in the part forming thecylinder 18 of thehydraulic piston 2 .
To therear screw joint 15 there is fastened from the opposite side a plastic catchingbox 20 for the collection of torn-off rivet pins after riveting. Into theforward end 22 of thetube 4 there is pressed a smallhollow piston 3 , between whose innerelongated end 25 and thetube 4 there is a ring-shaped space 17 . In that area thetube 4 is provided with anopening 5 , connected with the supply of pressurized air. Thetube 4 has clearance along the whole length of its positioning in thehydraulic piston 2 . The ring-shaped gap 27 thus created between thetube 4 and the body of the hollowhydraulic piston 2 forms a connection between theradial opening 5 of thetube 4 and thespace 6 in thecylinder 18 of thehydraulic piston 2 connected to the supply of pressurized air. Theouter shoulder 7 of thesmall piston 3 with itsradial projection 8 contacts the inner shoulder 29 of thehydraulic piston 2 under pressure from the compression spring 9 of thespacing mandrel 13 of thecollets 11 . Theouter shoulder 7 of thesmall piston 3 lies closely adjacent (due to its seal 21 ) to the surface of the central passage opening in thehydraulic piston 2 . Theseal 21 of thesmall piston 3 , for its positioning in the hollowhydraulic piston 2, is formed by means of a rubber O-ring in the hollowhydraulic piston 2 .
The front surface of thespacing mandrel 13 is shaped according to the slant of thecollets 11 around it, the two being freely inserted in thecasing 26 of the collets screwed to thehydraulic piston 2 . This whole clamping arrangement for rivet pins is placed in the front hose 14, which is screwed to thehydraulic piston 2 . Aninterchangeable 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.
Thetube 4 has an innerconical recess 12 , narrowing in the direction of the back end of the riveting tool. Theelongated end 25 of thesmall piston 3 , whose outer surface is also conical, is partly inserted into it, so that asuction nozzle 19 is formed. The smallhollow piston 3 has, at its forward end, a conical widening 28 of its axial opening facilitating improved suctioning of the air into the smallhollow piston 3 . - Pressurized air from the pneumatic part of the riveting tool is brought through channels (not illustrated) to the
space 6 in thecylinder 18 of thehydraulic 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 thetube 4 through the ring-shaped gap 27 between thetube 4 and the body of the hollow hydraulic piston 2 (which forms a connection between theradial opening 5 of thetube 4 and thespace 6 in thecylinder 18 of thehydraulic piston 2 , connected with the supply of pressurized air) to theradial opening 5 in thetube 4 . The pressurized air goes through theopening 5 to the ring-shaped space 17 between thetube 4 and thesmall piston 3 and is directed to thesuction nozzle 19 . In thenozzle 19 sub-atmospheric pressure arises under the impact of the flow of pressurized air to the back part of the tool, which causes suctioning of the air in the central operating channel (part of that channel is the central passage opening of thesmall piston 3 and the tube 4 ) from the front part of the riveting tool.
This makes possible the suctioning of the torn-off rivets to the opening of theextension 10 in the front part of the tool, without it being necessary to remove them by hand. At the same time the rivet is held fast in the given position regardless of the position of the riveting tool. After riveting the rivet pins are collected and move through the central operating channel in the direction of the back part of the riveting tool to the catchingbox 20 . The suctioning system (thepiston 3 with the tube 4 ) is freely placed as an independent element in the hollowhydraulic piston 2 and is permanently pressed against the inner shoulder 29 of thehydraulic piston 2 by the compression spring 9 of thespacing mandrel 13 of thecollets 11 . The back end 23 of thetube 4 is led through theinner opening 16 of theback screw joint 15 . - If for no matter what reason the main central operational channel of the riveting tool, and thereby at the same time the suctioning system become obstructed, by a simple dismantling of the front part of the riveting tool (with the unscrewing of the front hose 14 and of the sleeves of the collets, the
collets 11 , thespacing mandrel 13 and the spring 9 of thespacing mandrel 13 come out, then the connecting screws of the catchingbox 20 are loosened, thebox 20 is removed and the appropriate rod for disengaging the suctioning system is inserted into the central axial passage opening 16 in the rear screw joint 15 ) it is possible to slide out thetube 4 with thesmall piston 3 and replace it, or to clear the blocked channel as the case may be. This simple replacement can be carried out easily by the operator of the riveting tool without the need for specialized help. - The invention can be used in pneumatic hydraulic riveting tools with suctioning of blind rivets.
Claims (4)
- A device for suctioning the rivets in a riveting tool comprising a hydraulically controlled clamping assembly for rivet pins with collets (11), in which the cylinder (18) of the hydraulic piston (2) is provided with a supply of pressurized air from the lower pneumatic part, and which consists of a tube (4) passing through the axial central passage opening of the hydraulic piston (2), the back end (23) of which is tightly fitted in the 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); into the other, forward end (22) of the tube (4) there is pressed a small hollow piston (3) between whose inner elongated end (25) and the tube (4) there is a ring-shaped space (17) in which area the tube (4) is provided with at least one opening (5) connected with the supply of pressurized air, characterized by the fact that the tube (4) has clearance along the whole length of its positioning in the hydraulic piston (2), where 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 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, while the outer shoulder (7) of the small piston (3) with its radial projection (8) reaches the inner shoulder (29) of the hydraulic piston (2) under pressure from the compression spring (9) of the spacing mandrel (13) of the collets (11) and that the small piston (3) and the tube (4) are removably located within the axial central passage opening of the hydraulic piston (2) and can be withdrawn therefrom in the event of blockage.
- A device for suctioning the rivets in a riveting tool according to claim 1, characterized by the fact that the tube (4) has an inner conical recess (12), narrowing in the direction of the back end of the riveting tool, into which the elongated end (25) of the small piston (3), whose outer surface is also conical, is partly inserted, so that a suction nozzle (19) is formed.
- A device for suctioning the rivets of a riveting tool according to claims 1 or 2, characterized by the fact that the small hollow piston (3) has, at its forward end, a conical widening (28) of its axial opening.
- A device for suctioning the rivets of a riveting tool according to any of the preceding claims 1 to 3, characterized by the fact that the seal (21) of the small piston (3) for its positioning in the hollow hydraulic piston (2) is formed by means of an O-ring in the hollow hydraulic piston (2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CZ753898 | 1998-01-02 | ||
CZ19987538U CZ7414U1 (en) | 1998-01-02 | 1998-01-02 | Device for positioning riveting machine rivets by action of vacuum |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0928649A2 true EP0928649A2 (en) | 1999-07-14 |
EP0928649A3 EP0928649A3 (en) | 2000-03-15 |
EP0928649B1 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 (en) |
CZ (1) | CZ7414U1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101224486B (en) * | 2008-01-25 | 2010-10-06 | 孙延新 | Rivet pulling device of easy squeeze blind rivet gun |
CN111069516A (en) * | 2018-10-18 | 2020-04-28 | 南宁富桂精密工业有限公司 | Hand riveter |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11654475B2 (en) | 2020-06-03 | 2023-05-23 | Milwaukee Electric Tool Corporation | Rivet setting tool |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2116102A (en) * | 1982-03-08 | 1983-09-21 | Avdel Ltd | Riveting tool |
US5500990A (en) * | 1993-06-11 | 1996-03-26 | Wihan; Josef | Riveting tool |
-
1998
- 1998-01-02 CZ CZ19987538U patent/CZ7414U1/en not_active IP Right Cessation
- 1998-11-30 EP EP19980204028 patent/EP0928649B1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2116102A (en) * | 1982-03-08 | 1983-09-21 | Avdel Ltd | Riveting tool |
US5500990A (en) * | 1993-06-11 | 1996-03-26 | Wihan; Josef | Riveting tool |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101224486B (en) * | 2008-01-25 | 2010-10-06 | 孙延新 | Rivet pulling device of easy squeeze blind rivet gun |
CN111069516A (en) * | 2018-10-18 | 2020-04-28 | 南宁富桂精密工业有限公司 | Hand riveter |
CN111069516B (en) * | 2018-10-18 | 2021-11-02 | 南宁富桂精密工业有限公司 | Hand riveter |
Also Published As
Publication number | Publication date |
---|---|
EP0928649B1 (en) | 2003-06-11 |
CZ7414U1 (en) | 1998-06-01 |
EP0928649A3 (en) | 2000-03-15 |
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