US3851713A - Single shot riverting device - Google Patents

Single shot riverting device Download PDF

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Publication number
US3851713A
US3851713A US00353016A US35301673A US3851713A US 3851713 A US3851713 A US 3851713A US 00353016 A US00353016 A US 00353016A US 35301673 A US35301673 A US 35301673A US 3851713 A US3851713 A US 3851713A
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cover
housing
cylinder
hydropneumatic
striking means
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US00353016A
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English (en)
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V Kononenko
V Lepetjukha
L Vasilchenko
I Fedosenko
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    • 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
    • B21J15/16—Drives for riveting machines; Transmission means therefor
    • B21J15/22—Drives for riveting machines; Transmission means therefor operated by both hydraulic or liquid pressure and gas pressure
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S173/00—Tool driving or impacting
    • Y10S173/04—Liquid operated

Definitions

  • the striking means travels inside a cylinder and a rivet set means is arranged at one end face of the cylinder, and a cover having a socket receiving the striking means is at the other cylinder end.
  • the prior art single-shot riveting devices comprise a housing having a hollow cylinder wherein a striker is moving and at 'whose one end side a rivet set for upsetting rivet heads is arranged.
  • the cylinder cavity via the openings made therein, is connected with the compressed gas source to provide for the striker return to the initial position.
  • the striker working stroke is effected due to the compressed gas action, and the operator of such a riveting device has to press a lever or trigger in an abrupt manner in order to ensure an instantaneous opening of the line supplying the high-pressure compressed gas actuating the striker.
  • the operator gets fatigued very rapidly and cannot maintain the proper shape of rivet snap heads.
  • these devices exhibit an insufficient shock energy, since they are generally designed for operation on kgf/cm of gas mains. Therefore, they do not permit the clinching of aluminium alloy rivets having a diameter over 4 mm which are particularly difficult to clinch.
  • the pressure variations in the compressed air main lead to lower shock energy stability, thus deteriorating the riveting quality.
  • a single-shot riveting device comprising a housing having a hollow cylinder in whose cavity a striking means travels and at whose one end face a rivet set means is arranged, said hollow cylinder cavity being connected with a compressed gas source via the openings made therein and in the vicinity of said rivet set means for returning said striking means to its intiial position, wherein, according to the invention, said housing has a hydropneumatic cylinder arranged therein, said hydropneumatic cylinder having a floating piston, said floating piston separating a high-pressure compressed gas pneumatic portion and a hydraulic portion, which moves into said hydraulic portion when the fluid feed and the compressed gas pressure increases within said pneumatic portion whereby a working stroke of said striking means is effected within said hollow cylinder cavity, said last-named cavity communicating with said housing hydropneumatic cylinder hydraulic portion and being closed at the other hollow cylinder end face opposite said rivet set means by a cover fastened within said housing and having a clearance-free socket receiving said striking
  • higher shock energies are achieved by providing a hydropneumatic cylinder in the devices housing, said housing hydropneumatic cylinder including a high-pressure gas pneumatic portion and a hydraulic portion separated by a floating piston which compresses the gas in the pneumatic portion to a higher degree while moving therein.
  • the increase in the shock energy enables the clinching of steel and aluminum alloy rivets having'a diameter of 5 to 6 mm to be effected with the use of the devices according to the invention.
  • control valve employed in the device according to the invention permits the striking means working stroke to be automatically performed after the energy stroke storage is completed.
  • the invention is characterized in that the pneumatic portion of said hydropneumatic cylinder has overrunning stops arranged therein at its side walls, said stops restricting the floating piston travel, thus providing for a constant gas compression ratio and energy stroke stability.
  • the invention is further characterized in that the communication of the hollow cylinder cavity with the hydropneumatic cylinder hydraulic portion is effected via the openings closed by the striking means and made in the hollow cylinder near its cover, the fluid from hydropneumatic cylinder hydraulic portion flowing into the hollow cylinder during the striking means working stroke through these openings, and the hollow cylinder being mounted so that it is capable of turning around its axis relative to the cover in order to provide for varying the passage area of the openings for the purpose of controlling the striking means stroke energy.
  • the striking means stroke energy can be controlled as it is desired in a particular case, since the fluid flow velocity through the openings decreases with the opening area reduction resulting in a reduced striking means velocity, and, consequently, a reduced stroke energy thereof.
  • the stroke energy may be varied in the range from zero to maximum.
  • the invention provides a single-shot riveting device exhibiting the required shock energy to be effectively controlled in a wide range.
  • the floating piston may be made in the form of a washer, said hollow cylinder extending through said washer hole, and the control valve may be made of two assemblies, one of said assemblies bein a spring-loaded spindle having a cone head at its one end for shutting off said cover through hole and a slot at its other end for coupling said spindle with a starting trigger employed in the device to manually open the valve, said spindle being arranged in a hydraulic cavity made in said cover and communicating with said cover through hole and with said housing hydropneumatic cylinder hydraulic portion, and its other assembly being a hydropneumatic cylinder arranged in said cover and having a piston therein, said cover hydropneumatic cylinder piston being hinge-connected with said trigger via 1 a rod to ensure a small uplift of said trigger after the displacement of said cover hydropneumatic cylinder piston prior to the manual opening of said valve but following the gas compression cycle completion and separating a pneumatic portion of said cover hydropneumatic cylinder from a hydraulic portion thereof, said cover hydro
  • the partial or small ascent of the starting trigger will indicate that the device has stored the required energy and that the striking means is ready for effecting a working stroke.
  • the starting trigger of the device should be cocked or pulled up manually by the operator, the operation does not require the application of great pulling forces and thus cannot cause weakness or slanting of rivet snap heads. Therefore, the invention provides for the proper clinching of rivets.
  • the floating piston may be made in the form of a washer, with said cover extending through said washer hole, and the control valve being made in the form of a hydropneumatic cylinder arranged in said cover, said cover for the hydropneumatic cylinder pneumatic portion being connected with said housing for the hydropneumatic cylinder pneumatic portion via a port made in said cover and said cover for the hydropneumatic cylinder hydraulic portion being connected with said housing for the hydropneumatic cylinder hydraulic portion via a passageway made in said cover, said cover hydropneumatic cylinder having a piston separating said cover for the hydropneumatic cylinder pneumatic and hydraulic portions, said cover of hydropneumatic cylinder piston including a hollow rod arranged in said cover hydropneumatic cylinder hydraulic portion and having ports therein which connect said hollow rod cavity with said housing of the hydropneumatic cylinder hydraulic portion and with said cover through said hole, said hollow rod cavity having a spring-loaded check valve arranged therein which opens one of said rod ports running into said cover through a
  • control valve will enable the striking means to effect the working stroke right after the gas compression process when the housing hydropneumatic cylinder pneumatic portion has been completed.
  • control valve may be a movable hollow rod extending through a hole made in the floating piston, one end of said movable hollow rod entering clearance-free said cover through hole and thereby preventing the fluid from flowing into said cover socket via said cover through hole upon the fluid being fed into said housing hydropneumatic cylinder hydraulic portion and leaving said cover through hole for in order to communicate said cover socket with said housing hydropneumatic cylinder hydraulic portion during the striking means working stroke, said movable hollow rod having ports connecting its cavity with the housing hydropneumatic cylinder hydraulic portion and with the cover through hole, and shoulders at its outer surface spaced at some distance from each other, one of said shoulders being adapted for restricting the travel of said movable hollow rod inside said cover through hole and the other of said shoulders being adapted for interacting with the floating piston so that the latter draws out said, movable hollow rod from said cover through hole while moving up during said striking means working stroke, said movablehollow rod cavity having a spring-loaded check valve arranged therein which opens one of
  • control valve may be formed by an extension provided on said cover, the cover through hole passing'through the extension, and by a socket made in the floating piston, said extension entering clearance-free said socket and thereby preventing the fluid from flowing into the cover socket via the through hole when the fluid is fed into the housing hydropneumatic cylinder hydraulic portion and leaving the floating piston socket for communicating the cover socket with the housing hydropneumatic cylinder hydraulic portion during the striking meansworking stroke and.
  • the cover having a cavity therein which is connected with the housing hydropneumatic cylinder hydraulic portion and the cover socket by means of ports made in the cover, said cover cavity having a spring-loaded check valve arranged therein which opens one of the cover ports running into the cover socket for communicating the cover socket with the housing hydropneumatic cylinder hydraulic portion when the striking means is being returned to its initial position.
  • the single shot riveting devices may be successfully employed for such production operations as metal branding, punching, perforating, caulking of turbine blade tenons, etc. ln order to meet the standards of this case it is only necessary to change the rivet set means for a suitable attachment well known in the art.
  • the singleshot riveting device has smaller weight and overall dimensions, exhibits a higher specific shock energy and improved shock stability, thus enabling high-quality riveted joints to be obtained regardless of the operators skill.
  • FIG. .1 shows diagrammatically a longitudinal sectional view of the single-shot riveting device according to the invention
  • FIG. 2 shows a view'similar to FIG. 1, but illustrating a second embodiment of the invention
  • FIG. 3 shows a view similar to FIG. 1, but illustrating a third embodiment of the invention
  • FIG. 4 is a view similar to FIG. 1, but illustrating a fourth embodiment of the invention.
  • FIG. 5 is a sectional view along the line VV of FIG.
  • FIG. 6 is a view similar to FIG. 5 with the hollow cylinder position changed with respect to the cover.
  • the single-shot riveting device comprises a housing 1 (FIGS. 1, 2, 3, 4) having a hollow cylinder 2 concentrically arranged therein and fixed with respect to the housing by a retaining ring 3.
  • Cylinder 2 has a cavity 4 with a striking means 5 therein which travels reciprocatingly within the cavity performing a stroke.
  • a rivet set means 6 for upsetting rivet heads is arranged at one end face of cylinder 2, and a cover 7 fixedly jointed with a housing 1 by a nut 3 is arranged at the other cylinder end face (FIG. I).
  • the housing is provided with a cavity 9 for accomodating the low-pressure gas used to return a striking means 5 to its initial position, and a hydropneumatic cylinder having a pneumatic portion 10 used for accomodating the high-pressure compressed gas driving a striking means 5 during its working stroke and a hydraulic portion I1 separated from the pneumatic cavity 10 by a floating piston 12 compressing the gas in portion It), while moving therein, and thereby increasing the gas pressure therein, i.e., for effecting the compressed gas energy storage for performing a working stroke by striking means 5 when the fluid is fed into a hydraulic portion 11.
  • the travel of the floating piston 12 is restricted by overrunning stops I3 mounted in the pneumatic portion 10 at its sidewalls.
  • a handle 14 having a lever 15 and a flexible shaft or cable 16 is fastened to cover 7.
  • the cavity 9 is filled with a low-pressure gas from a compressed gas source (not shown in the drawing) via a pipe connection 17, a check valve 18, a passageway 19 in cover 7 and a passageway 20 in housing 1; ports 21 made in cylinder 2 in the vicinity of a rivet set means 6 serve to connect housing cavity 9 with cavity 4' of cylinder 2.
  • Pneumatic portion W is filled with low-pressure compressed gas via a pipe connection 22, a check valve 23, a passageway 24 in cover 7 and a passageway 25 in housing 1.
  • the hydraulic portion ll. of the housing hydropneumatic cylinder communicates with cavity 4 of cylinder 2 via openings 26 made in the hollow cylinder near cover 7. Openings 26 are shut off by striking means 5 on its way back to the initial position and opened during the working stroke of the striking means 5; openings 26 are adapted for to admit the fluid from the hydraulic portion 11 of the housing hydropneumatic cylinder into cavity 4 of cylinder 2.
  • hollow cylinder 2 is turnably mounted around its axis A-A relative to cover 7.
  • FIG. 5 illustrates the position of hollow cylinder 2, after it has been turned with respect to cover 7, corresponding to the maximum passage section of openings 26 when the device operates at a maximum shock energy.
  • the cover 7 (FIGS. ll, 2, 3, 4) has a socket 27 made therein which is entered clearance-free by striking means 5 on its way back to the initial position, whereby the fluid is prevented from flowing into the space between striking means 5 and the cover 7 from hydraulic portion lll when the fluid is fed into this portion,'and the striking means 5 leaves after the required pressure has been built up in portion 11 when the gas compression cycle has been completed in the pneumatic POT- tion 10.
  • cover 7 has a through hole 28 connecting this socket with hydraulic portion 11 via a control valve 23 mounted in cover 7.
  • This control valve shuts off hole 28 during the pressure build-up in the housing hydraulic portion 1 1 and opens it during the striking means working stroke and then returns it to the initial position.
  • Control valve 29 may be variously embodied, and the four particular embodiments of the control valve described below do not constitute a departure from the spirit of the invention but imply various alternatives or modifications affecting only the cover 7 (as can be clearly seen from FIGS. 1, 2, 3, 4) and the number of passageways through which the compressed gas is fed into a pneumatic portion 10. It will be mentioned that the passageways through which the low-pressure compressed gas flows into housing cavity 9 are not shown in FIGS. 2, 3, 4 in order to make the drawings more easily read.
  • Control valve 29 may have two assemblies, one of which is a spindle 31 spring-loaded by spring 30 and having a cone head 32 at one end and a slot 33 at its other end and the other assembly is a hydropneumatic cylinder 3 arranged in cover 7 and having a piston 35 with a rod 36, and adapted for controlling the gas compression in the pneumatic portion 10 of housing 1.
  • the spindle 31 is housed in the hydraulic portion 37 made in cover 7 and communicating with through hole 28 of the cover and, via a passageway 38 in cover 7, with hydraulic portion 11 of the hydropneumatic cylinder arranged in housing 1.
  • Cone head 32 fits in hole 28 by its pointed or tapered portion and shuts off or closes this hole during the working stroke of a striking means 5, thus preventing the fluid from flowing into socket 27 during the gas compression in pneumatic portion 10 of the housing hydropneumatic cylinder.
  • a trigger 39 mounted on a pin 40 or stud 40 in a pit 41 of cover 7 is designed for a manual control of valve 29.
  • Trigger 39 has its one end hinge-connected with rod 36 of piston 35. The travel of piston 35 causes a partial uplift of trigger 39 so that it partially leaves pit 41 before spindle 31 is manually raised and the through hole 28 is opened when the gas compression in the pneumatic portion 10 of the housing hydropneumatic cylinder is completed.
  • trigger 39 is connected with spindle 31 by means of a hinge 42 fitted into slot 33.
  • piston 35 with rod 36 displace trigger 39 with hinge 42 sliding in slot 33 and spindle 31 remaining at a checked position, i.e., with hole 28 remaining closed.
  • Hydropneumatic cylinder 34 of cover 7 has a pneumatic portion 32 and a hydraulic portion 44 separated by piston 35.
  • Pneumatic portion 43 is connected with pneumatic portion 10 of the hydropneumatic cylinder of housing 1 via a port 45 and passageways 24 and made in cover 7 and housing 1, respectively, and hydraulic portion 44 is connected with a pressure main line 46 as well as with hydraulic portion 11 of the housing hydropneumatic cylinder via a port 47 in cover 7, hydraulic portion 37 and passageway 38.
  • a shock absorber 48 is installed between hollow cylinder 2 and housing 1.
  • piston 12 is made in the form of a washer with hollow cylinder 2 extending through the washer hole.
  • the device is first aimed at a rivet (not shown in the drawing). Then lever 15 is pressed, and this lever, via a flexible shaft or cable 16, turns on the fluid feed into a passageway 49 from pressure main line 46, for example via a multiplying means (not shown in the drawing).
  • the fluid is fed into hydraulic portion 44 via passageway 49 and then into cover cavity 37 via port 47, and by passageway 38 the fluid is fed into hydraulic portion 11 of the hydropneumatic cylinder of housing I.
  • Floating piston 12 is displaced to the left (in the drawing plane) and compresses the gas in pneumatic portion 18 of the housing hydropneumatic cylinder to a greater extent by pressure, i.e., the compressed gas energy is stored for effecting a working stroke by striking means 5.
  • Piston 35 of hydropneumatic cylinder 34 arranged in cover 7 is at the extreme right-hand position, since the piston effective area is larger at the side of pneumatic portion 43 than at the side of hydraulic portion 44.
  • Head 32 of spindle 31 enters through hole 28 under the action of spring 30 and shuts off this hole.
  • the fluid occupies the volume of socket 27 and drives striking means 5 into cavity 4 of cylinder 2, i.e., striking means 5 is speeded up by the fluid which is enclosed within hydraulic portion 1 l at a compressed gas pressure built up in pneumatic portion 10.
  • passageway 48 will be connected with a drain line (not shown in the drawings), and the gas held in the housing cavity 9 will drive the striking means 5 into its initial position, i.e., into socket 27 of cover 7.
  • the fluid flows into a drain line via openings 26, passageway 38, cover hydraulic cavity 37, port 47, hydraulic portion 44 of cylinder 34 and passageway 49.
  • piston 35 of hydropneumatic cylinder 34 is moved to its initial position; at the same time, trigger 39, while turning around stud 40, enters pit 41. Which being driven by spring 30, head 32 of spindle 31 shuts off hole 28.
  • Striking means 5 occupies its initial position in socket 27, and is now ready for the next working stroke.
  • Control valve 29 is made in the form of a hydropneumatic cylinder 50 (FIG. 2) arranged in cover 7. A hydraulic portion 51 of this hydropneumatic cylinder is separated from a pneumatic portion 52 by a piston 53.
  • Pneumatic portion 52 is connected with pneumatic portion 10 of the hydropneumatic cylinder of housing 1 via a port 54 made in cover 7, and hydraulic portion Sll is connected with hydraulic portion ll of the housing hydropneumatic cylinder via a passageway 55 of cover 7.
  • Piston 53 has a hollow rod 56 which is housed in hydraulic portion 51 of cylinder 50.
  • the free end of this hollow rod is received clearance-free by through hole 28 of cover 7 thereby preventing the fluid from flowing into socket 27 of cover 7 from hydraulic portion 11 of the housing hydropneumatic cylinder via this through hole 28, after the pressure has been built up in hydraulic portion 11, and leaves hole 28 for communicating socket 27 with hydraulic portion 11 during the working stroke of striking means 5.
  • a cavity 57 of rod 56 communicates with through hole 28 and hydraulic portion 11 of the housing hydropneumatic cylinder via ports 58 and 59, respectively, made in rod 56.
  • Cavity 57 of rod 56 has a spring-loaded check valve 60 arranged therein which shuts off a port 58 running into through hole 28 of cover 7 and opens this port for draining the fluid therethrough from socket 27 of cover 7 when striking means is being returned to its initial position.
  • floating piston 12 is made in the form of a washer and cover 7 extends through the washer hole.
  • Valve 29 is opened automatically after the gas compression in the pneumatic portion 10 of the housing hydropneumatic cylinder is completed.
  • the fluid feed into hydraulic portion 11 is accomplished via a passageway 61, and in order to drive striking means 5, the fluid is fed into socket 27 when rod 56 is drawn out of through hole 28.
  • piston 53 Due to the fluid action, piston 53 is displaced to the right and rod 56 leaves hole 28 opening the way for the fluid to flow into hole 28 from hydraulic portion 51 via recess 62 at the side surface of rod 56.
  • the continuously growing fluid pressure at hole 28 acts on striking means 5 and presses it out.
  • striking means 5 leaves cover socket 27, and the fluid inflow appearing in this socket displaces striking means 5 to the left (in the drawing plane).
  • the striking means end face will be affected by the fluid pressure available in a hydraulic portion 11, with the fluid pressure being equal to the compressed gas pressure within pneumatic portion 10.
  • the fluid gets into cavity 4 of cylinder 2 via openings 26, and speeds up striking means 5 for a shot.
  • passageway 61 will be communicated with the drain system, the pressure in hydraulic portion 11 of the housing hydropneumatic cylinder will drop and striking means 5 will return to its initial position under the action of the gas operationg in housing cavity 9 while expelling the fluid from cavity 4 of cylinder 2 via openings 26, hydraulic portion 11 and passageway 61.
  • Piston 53 driven by the gas operating in pneumatic portion 52 connected with pneumatic portion 10 by port 54, with rod 56 also returns to its initial position, i.e.
  • rod 56 fits in through hole 28 disconnecting hydraulic portion 51 of hydropneumatic cylinder 50 and socket 27 in cover 7 A portion of the fluid is forced out of socket 27 into the drain system via hole 28 and port 58, while check valve 60 is retracted, and then drained via cavity 57 of rod 56, port 59, hydraulic portion 51, passageway 55, hydraulic portion 11 and passageway 61. As soon as striking means 5 fits in socket 27 completely, check valve 60 will return to its initial position and shut off port 58 due to the action of a spring 63.
  • EMBODIMENT Ill '64 extends through this hole 67.
  • One end of movable rod 64' is capable of entering clearance-free the through hole 28 for preventing the fluid from flowing into socket 27 of cover 7 via through hole 28 when the fluid is fed into hydraulic portion 11 of a hydropneumatic cylinder arranged in housing 1, and leaving this through hole 28 for communicating socket 27 with hydraulic portion 11 during the working stroke of striking means 5.
  • Rod 64 also ports 69 and made therein and said rod 64 is communicated by with through. hole 28 and hydraulic portion 11 of the housing hydropneumatic cylinder, respectively.
  • Shoulder 65 of rod 64 is adapted for restricting the travel of rod 64 in through hole 28 of cover 7, and shoulder 66 is adapted for interacting with floating piston 12 which, while moving, draws out rod 64 from through hole 28 during the striking means working stroke.
  • Cavity 68 of rod 64 has a spring-loaded check valve 71 arranged therein which opens a port 69 in rod 64 for draining the fluid out from cover socket 27 via this port and hole 28 when the striking means is returned to its initial position.
  • a rod 64 fits in a cover hole 28 disconnecting the portion 11 and socket 27 the shoulder 65 abutting against the cover 7 and restricting the travel of the rod 64 through the hole 28.
  • the passageway 61 is put in communication with the draining system, the pressure in the hydraulic portion 11 of the housing hydropneumatic cylinder drops and, under the action of gas operating in the cavity 9 striking 7 and made at cover 7 and a socket 74 made at cover 7 in floating piston 12.
  • Extension 73 can be clearance-free fitted into socket 74 for preventing the fluid from flowing into socket 27 of cover 7 from hydraulic portion 11 via through hole 28 when the fluid is fed into hydraulic portion 11, and withdrawn from this socket 74 for communicating cover socket 27 with housing hydraulic portion 11 during the working stroke of striking means 5 and travel of floating piston 12.
  • means 5 returns to its initial position expelling the fluid from cavity 4 of the cylinder 2 via openings 26, the hydraulic cavity 11 and the passageway 61.
  • the fluid forced out from the socket 27 by the striking means 5 retracts a valve 71 via the hole 28 and a port 69 and flows into the cavity 68 of the piston 64. From the cavity 68 the fluid is drained via ports 70, the hydraulic cavity 11 and the passageway 61. Since the fluid pressure in the cavity 11 is continuously dropping, a valve 71 will shut off the port 69 under the action of a spring 72.
  • the device is now ready for the next working operating cycle.
  • Embodiment lV spring-loaded check valve 78 arranged therein which opens a port 76 for communicating socket 27 with hydraulic portion 11 when striking means 5 is returned to its initial position.
  • passageway 61 will be communicated with the draining system; the pressure in hydraulic portion 11 will drop and, driven by the gas operating in housing cavity 9, striking means 5 will return to its initial position expelling the fluid from cavity 4 of cylinder 2 via openings 26, hydraulic portion 11 and passageway 61.
  • the fluid forced out from cover socket 27 via a port 76 and a cavity by striking means 5 will retract a valve 78. From cavity 75 the fluid gets into hydraulic portion 11 via a port 77 and then is drained via passageway 61. Since the fluid pressure in hydraulic portion 11 is continuously dropping, valve 78 will shut off port 76 under the action of a spring 79.
  • the device is now ready for the next working cycle.
  • a single-shot riveting device comprising: a housing; a hollow cylinder arrnged in said housing and having a cavity and two end faces; a striking means travelling in said cavity of said hollow cylinder for effecting clinching; a rivet set means adaptedfor upsetting rivet heads arranged at one end face of said hollow cylinder; ports made in said hollow cylinder in the vicinity of said rivet set means; a cavity made in said housing and connected with said cylinder cavity via said ports and with a compressed gas source for returning said striking means to its initial position; a hydropneumatic cylinder arranged in said housing and having a high-pressure compressed gas pneumatic portion adapted for storing the compressed gas energy and effecting a working stroke of said striking means, and a hydraulic portion communicating with said hollow cylinder cavity during the travel of said striking means; a floating piston separating said pneumatic and hydraulic portions of said housing hydropneumatic cylinder and moving in said housing hydropneumatic cylinder, whereby the compressed gas pressure in said housing hydropneumatic cylinder pneumatic portion is increased for said storage of the
  • a single-shot riveting device comprising: a housing; a hollow cylinder arranged in said housing and having a cavity and two end faces; a striking means travelling in said cavity of said hollow cylinder for effecting clinching; a rivet set means adapted for upsetting rivet heads arranged at one end face of said hollow cylinder; ports made in said hollow cylinder in the vicinity of said rivet set means; a cavity made in said housing and connected with said cylinder cavity via said ports and with a compressed gas sourc for returning said striking means to its initial position; a hydropneumatic cylinder arranged in said housing and having a pneumatic portion for high-pressure compressed gas adapted for storing the-compressed gas energy and effecting a working stroke of said striking means and a hydraulic portion for communicating with said hollowcylinder cavity during the travel of said striking means a floating piston made in the form of a washer, said hollow cylinder extending through the hole of said washer, said floating piston separating said pneumatic and hydraulic portions of said housing hydropneumatic cylinder and moving in said housing hydropneumatic
  • a single-shot riveting device comprising: a housing; a hollow cylinder arranged in said housing and having a cavity and two end faces; a striking means travelling within said cavity of said hollow cylinder for effecting clinching; a rivet set means adapted for upsetting rivet heads arranged at one end face of said hollow cylinder; ports made in said hollow cylinder in the vicinity of siad rivet means; a cavity made in said housing and connected with said cylinder cavity via said ports and with a compressed gas source for returning said striking means to its initial position; a hydropneumatic cylinder arranged in said housing and having a pneumatic portion for high-pressure compressed gas adapted for storing the compressed gas energy and effecting a working stroke of said striking means, and a hydraulic portion communicating with said hollow cylinder cavity during the travel of said striking means; a cover arranged at the other end side of said hollow clinder and fixedly connected with said housing; a floating piston made in the form of a washer, said hollow cylinder extending through the hole of said washer, said floating piston separating said pneumatic
  • a single-shot riveting device comprising: a housing; a hollow cylinder arranged in said housing and having a cavity and two end faces; a striking means travelling within said cavity of said hollow cylinder foreffecting clinching; a rivet set means adapted for upsetting rivet heads arranged at one end side of said hollow cylinder; ports made in said hollow cylinder in the vicinity of said rivet means; a cavity made in said housing and connected with said cylinder cavity via said ports and with a compressed gas source for returning said striking means to its initial position; a hydropneumatic cylinder arranged in said housing and having a high-pressure compressed gas pneumatic portion adapted for storing the compressed gas energy and effecting a working stroke of said striking means, and a hydraulic portion communicating with said hollow cylinder cavity during the travel of said striking means; a floating piston separating said pneumatic and hydraulic portions of said housing hydropneumatic cylinder and moving in said housing hydropneumatic cylinder whereby the compressed gas pressure in said housing hydropneumatic cylinder pneumatic portion is increased to a greater extent for said compressed gas
  • a single-shot riveting device comprising: a housing; a hollow cylinder arranged in said housing and hav-, ing two end faces; a striking means travelling in said hollow cylinder cavity for effecting clinching; a rivet set means adapted for upsetting rivet heads arranged at one end face of said hollow cylinder; ports made in said hollow cylinder in the vicinity of said rivet set means; a cavity made in said housing and connected with said cylinder cavity via said ports and with a compressed gas sourc for returning said striking means to its initial postion; a hydropneumatic cylinder arranged in said housing and haing a high-pressure compressed gas pneumatic portion adapted for storing the compressed gas energy and effecting a working stroke of said striking means, and a hydraulic portion communicating with said hollow cylinder cavity during the travel of said striking means; a floating piston separating said pneumatic and hydraulic portions of said housing hydropneumatic cylinder and moving in said housing hydropneumatic cylinder whereby the compressed gas pressure in said hosing hydropneumatic cylinder pneumatic portion is increased to
US00353016A 1972-03-16 1973-04-20 Single shot riverting device Expired - Lifetime US3851713A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SU1759257 1972-03-16
SU1795791 1972-06-20

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US00353016A Expired - Lifetime US3851713A (en) 1972-03-16 1973-04-20 Single shot riverting device

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US (1) US3851713A (de)
AT (1) AT326455B (de)
CA (1) CA982371A (de)
FR (1) FR2176119A1 (de)
IT (1) IT992368B (de)

Cited By (10)

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US4039034A (en) * 1975-06-30 1977-08-02 The Boeing Company Pneumatic impact gun
US4074777A (en) * 1974-08-08 1978-02-21 Atlas Copco Aktiebolag Pneumatic impact tool
US4120367A (en) * 1976-06-25 1978-10-17 The Boeing Company Pneumatic impact gun
WO1984003122A1 (en) * 1983-02-10 1984-08-16 Group Corp M Vibrationless percussion tool
US4506742A (en) * 1983-04-29 1985-03-26 M Group Corporation Vibrationless percussion tool
US4625812A (en) * 1985-04-01 1986-12-02 Lisle Corporation Pneumatic impact hammer
US4862972A (en) * 1986-12-15 1989-09-05 Sudinshnikov Vadim B Single-blow pneumatic percussive tool
US5042253A (en) * 1989-05-15 1991-08-27 Ishigame Machinery Co., Ltd. Hydraulic-pneumatic cylinder device with annular flexible bag as interface
US20060037767A1 (en) * 2004-08-17 2006-02-23 Kuo-Jung Leu Air cylinder for reciprocating pneumatic tool
US20070267206A1 (en) * 2006-05-19 2007-11-22 Tranmax Machinery Co., Ltd. Single-hand operable structure for controlling forward/backward intake of a straight pneumatic wrench

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322210A (en) * 1963-09-06 1967-05-30 Beteiligungs & Patentverw Gmbh Impact tool
US3601988A (en) * 1969-10-28 1971-08-31 German Petrovich Chermensky Device for building-up fluid pressure pulses
US3625295A (en) * 1970-02-12 1971-12-07 Kent Air Tool Co Airhammer
US3792740A (en) * 1972-04-05 1974-02-19 W Cooley Hydraulic powered hammer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322210A (en) * 1963-09-06 1967-05-30 Beteiligungs & Patentverw Gmbh Impact tool
US3601988A (en) * 1969-10-28 1971-08-31 German Petrovich Chermensky Device for building-up fluid pressure pulses
US3625295A (en) * 1970-02-12 1971-12-07 Kent Air Tool Co Airhammer
US3792740A (en) * 1972-04-05 1974-02-19 W Cooley Hydraulic powered hammer

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074777A (en) * 1974-08-08 1978-02-21 Atlas Copco Aktiebolag Pneumatic impact tool
US4039034A (en) * 1975-06-30 1977-08-02 The Boeing Company Pneumatic impact gun
US4120367A (en) * 1976-06-25 1978-10-17 The Boeing Company Pneumatic impact gun
WO1984003122A1 (en) * 1983-02-10 1984-08-16 Group Corp M Vibrationless percussion tool
US4506742A (en) * 1983-04-29 1985-03-26 M Group Corporation Vibrationless percussion tool
US4625812A (en) * 1985-04-01 1986-12-02 Lisle Corporation Pneumatic impact hammer
US4862972A (en) * 1986-12-15 1989-09-05 Sudinshnikov Vadim B Single-blow pneumatic percussive tool
DE3690814C2 (de) * 1986-12-15 1990-12-20 Inst Gornogo Dela Sibirskogo O Pneumatische Vorrichtung f}r einmalige Schl{ge
US5042253A (en) * 1989-05-15 1991-08-27 Ishigame Machinery Co., Ltd. Hydraulic-pneumatic cylinder device with annular flexible bag as interface
US20060037767A1 (en) * 2004-08-17 2006-02-23 Kuo-Jung Leu Air cylinder for reciprocating pneumatic tool
US20070267206A1 (en) * 2006-05-19 2007-11-22 Tranmax Machinery Co., Ltd. Single-hand operable structure for controlling forward/backward intake of a straight pneumatic wrench

Also Published As

Publication number Publication date
IT992368B (it) 1975-09-10
FR2176119A1 (de) 1973-10-26
CA982371A (en) 1976-01-27
ATA237073A (de) 1975-02-15
AT326455B (de) 1975-12-10

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