CN115229060A - Automatic nut riveting die and method thereof - Google Patents
Automatic nut riveting die and method thereof Download PDFInfo
- Publication number
- CN115229060A CN115229060A CN202210811793.XA CN202210811793A CN115229060A CN 115229060 A CN115229060 A CN 115229060A CN 202210811793 A CN202210811793 A CN 202210811793A CN 115229060 A CN115229060 A CN 115229060A
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- China
- Prior art keywords
- plate
- arc plate
- shell
- rivet nut
- riveting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
Abstract
The invention discloses an automatic nut riveting die and a method thereof in the technical field of nut riveting, and the automatic nut riveting die comprises a base, wherein a hydraulic mechanism is arranged on the base through a support, an upper die is arranged at the telescopic end of the hydraulic mechanism, a lower die is arranged right below the upper die, and a feeding structure is arranged on the upper surface of the base; go up the mould include with hydraulic pressure mechanism fixed connection's clamp plate, clamp plate bottom fixedly connected with sleeve pipe, clamp plate outer wall cover is equipped with the shell, shell outer wall fixedly connected with is used for pressing down the outer clamping ring of rivet nut, shell inner wall fixedly connected with triggers the ring, intraductal wall fixedly connected with extension spring, expand and form cylindric cutting knife through passing inner arc board and outer arc board after the rivet nut, the cutting knife carries out the trompil to the work piece, the shell makes rivet nut warp and work piece riveting with the downthehole and extrusion of the newly-opened of rivet nut suppression of shell outer wall with the lower mould, the purchase of equipment has been reduced, use and maintenance cost, the strength requirement to rivet nut has also been reduced.
Description
Technical Field
The invention relates to the technical field of riveting nuts, in particular to an automatic riveting nut die and a method thereof.
Background
The press riveting nut is also called a riveting nut, is a self-fastening nut applied to a thin plate or a metal plate, is circular in shape, and is provided with embossing teeth and a guide groove at one end. The principle is that the embossing teeth are pressed into the preset hole positions of the metal plate, generally, the aperture of each preset hole is slightly smaller than the embossing teeth of the press riveting nut, the embossing teeth of the press riveting nut are extruded into the plate through pressure, the periphery of each preset hole is subjected to plastic deformation, and a deformed object is extruded into the guide groove, so that the locking effect is achieved.
When a workpiece is subjected to nut pressing and riveting in the existing mode, a part of pressing and riveting dies need to be provided with through holes for placing the pressing and riveting nuts on the workpiece in advance, and then the workpiece is placed in the pressing and riveting dies for pressing and riveting, extra hole opening equipment is not only needed in the process, and extra operators are needed for hole opening operation, the purchase cost and the maintenance cost of the equipment are not small expenses, the centering of the through holes and the pressing and riveting nuts is very difficult in the pressing and riveting process of the workpiece after the holes are opened, and the pressing and riveting nuts are easily damaged if the deviation between the pressing and riveting nuts is too large;
still some pressure riveting die is then directly through the pressure riveting nut of forcing for the pressure riveting nut carries out the trompil to the work piece, and this kind of mode though the eccentric condition of riveting nut and through-hole can not appear, but this intensity to the work piece needs to be less than the intensity of pressure riveting nut, otherwise can lead to the pressure riveting nut to warp, leads to can't carry out the trompil to the work piece, more can't accomplish the pressure riveting work.
Based on the above, the invention designs an automatic nut riveting die and a method thereof, so as to solve the problems.
Disclosure of Invention
The invention aims to provide an automatic nut riveting die and a method thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the riveting device comprises a base, wherein a hydraulic mechanism is installed on the base through a support, an upper die is installed at the telescopic end of the hydraulic mechanism, a lower die installed on the base is arranged right below the upper die, and a feeding structure used for feeding riveting nuts to the position right below the upper die is installed on the upper surface of the base;
the upper die comprises a pressing plate fixedly connected with a hydraulic mechanism, the bottom of the pressing plate is fixedly connected with a sleeve, the outer wall of the pressing plate is sleeved with a shell, the outer wall of the shell is fixedly connected with an outer ring for pressing down rivet nuts, the inner wall of the shell is fixedly connected with a triggering ring, the inner wall of the sleeve is fixedly connected with an extension spring, the bottom of the extension spring is fixedly connected with a pull rod in sliding connection with the sleeve, the side walls of the sleeve and the pull rod are hinged with connecting rods which are circumferentially arrayed along the axis of the sleeve, the sleeve and the pull rod are respectively hinged with an inner arc plate and an outer arc plate through the connecting rods, a cutting knife consisting of the inner arc plate and the outer arc plate is arranged in the shell, the cutting knife is small in top and large in bottom, the outer diameter of the top is the same as the outer diameter of the shell, and the outer diameter of the bottom is the same as the inner diameter of the rivet nuts;
as a further scheme of the invention, the feeding structure comprises a telescopic rod which is arranged on the base through a support, a feeding plate with a U-shaped structure is arranged at the movable end of the telescopic rod, a feeding track is arranged above the feeding plate, the tail end of the feeding track is positioned above the retracted state of the feeding plate and is provided with a feed opening, a limiting plate with a chamfer angle at the top is connected to the inner wall of the feeding plate in a sliding manner, and a limiting spring is arranged between the limiting plate and the feeding plate;
as a further scheme of the invention, a support frame for limiting the feeding plate in the extending state is arranged at the top of the base through a support, a notch matched with the feeding plate is formed in the side wall of the support frame, and chamfers are arranged on the notch and the feeding plate;
as a further scheme of the invention, the telescopic rod and the support frame are both in threaded connection with bolts, the telescopic rod and the support frame are both in sliding connection with slide rails through bolts, and the slide rails are both fixedly connected with the base through supports;
as a further scheme of the invention, the lower die comprises a bottom plate fixed with the base, fixing pieces are arranged in a circumferential array around the axis of a feed opening, a feed opening is formed in the center of the bottom plate, the tops of the fixing pieces are fixedly connected with a platform together, the fixing pieces are connected with wedge-shaped blocks in a sliding manner, and a trigger spring is fixedly connected between the wedge-shaped blocks and the fixing pieces;
as a further scheme of the invention, hinged parts which are rotatably connected with the connecting rod are arranged among the sleeve, the pull rod and the connecting rod, and the bottoms of the hinged parts are fixedly connected with L-shaped limiting baffles which are used for limiting the connecting rod to be vertical;
as a further scheme of the invention, the bottom of the outer pressure ring is fixedly connected with a spring plate.
An automatic nut riveting method comprises the following steps,
firstly, in the feeding process, a workpiece is placed on a lower die, a feeding plate is moved by a telescopic rod, when the feeding plate passes through a feeding track, a rivet nut is fed onto the feeding plate, and the telescopic rod feeds the rivet nut between the upper die and the lower die through the feeding plate;
secondly, enabling cutting knife parts to penetrate through the rivet nuts, enabling the hydraulic mechanism to drive the pressing plate to descend, enabling the sleeve and the pull rod to descend along with the pressing plate, enabling the sleeve and the pull rod to drive the inner arc plate and the outer arc plate to descend through the upper die hinged with the sleeve and the pull rod, enabling the shell to naturally fall under the action of gravity when the shell loses support, and enabling the shell to stop descending when the outer ring contacts the rivet nuts after the shell penetrates through the rivet nuts;
step three, assembling a cutting knife, wherein the sleeve and the pull rod continue to descend, the outer arc plate and the inner arc plate contact the workpiece successively, the outer arc plate and the inner arc plate contact the workpiece and then are subjected to resistance, the outer arc plate and the inner arc plate move around successively under the action of the inclined connecting rod, and the inner arc plate abuts against the moved-back outer arc plate and forms a cylindrical cutting knife;
step four, drilling a hole on the workpiece, continuously descending the sleeve and the pull rod, drilling the hole on the workpiece by a cutting knife consisting of an inner arc plate and an outer arc plate, separating the inner arc plate and the outer arc plate at different heights by an extension spring after drilling, and naturally hanging down the inner arc plate and the outer arc plate;
fifthly, riveting the rivet nut with the workpiece, pressing the rivet nut downwards by the shell through the outer pressure ring when the pressure plate contacts the trigger ring in the process that the sleeve and the pull rod continue to descend, enabling the rivet nut to enter the workpiece hole, extruding the rivet nut by the shell and the lower die to deform the rivet nut and completing riveting with the workpiece;
and sixthly, taking out relevant parts of the cutting knife, moving the pressing plate upwards by the hydraulic mechanism, enabling the sleeve and the pull rod to move upwards, and taking out the inner arc plate, the outer arc plate and the shell from the rivet nut in sequence.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the inner arc plate and the outer arc plate penetrate through the rivet nut and then are unfolded to form the cylindrical cutting knife through descending of the pressing plate, the cutting knife is used for perforating a workpiece, the rivet nut on the shell enters the hole in the workpiece, the shell and the lower die extrude the rivet nut to deform and rivet the workpiece, after perforation is carried out, the outer arc plate is separated from the inner arc plate through the stretching spring, the inner arc plate and the outer arc plate naturally hang down under the action of gravity, when the sleeve rises, the inner arc plate and the outer arc plate can penetrate through the rivet nut on the workpiece and reset, compared with the method that the hole is formed in the workpiece in advance, and then the rivet nut is pressed into the workpiece hole in a pressing and riveting mode, the perforating and pressing work can be completed through only one set of equipment, the expense for purchasing multiple sets of equipment and maintaining is reduced, and the purchase, use and maintenance cost of the equipment of the rivet nut are greatly reduced under the condition that the rivet nut and the workpiece are not eccentric;
2. according to the invention, the inner arc plate and the outer arc plate penetrate through the rivet nut and contact with a workpiece through the descending of the pressing plate, then the inner arc plate and the outer arc plate are unfolded and form a cylindrical cutting knife, the cutting knife is used for perforating the workpiece, the rivet nut shell on the shell is deformed and riveted with the workpiece under the action of the lower die, compared with a mode that the rivet nut is pressed by strong pressure directly, the rivet nut is used for perforating the workpiece, the strength requirement on the rivet nut is lower, the workpiece is not required to be perforated by the rivet nut, the problem that the rivet nut is deformed to cause that the rivet nut cannot be perforated and cannot complete the press riveting work is solved, the rivet nut is not required to be used for perforating the workpiece through the rivet nut deformation mode, the workpiece is not influenced, and the workpiece can be used for a second time without secondary processing after the rivet nut is cut off. The recycling cost of the workpieces is reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the general cross-sectional structure of the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 2 according to the present invention;
FIG. 4 is an enlarged view of the structure at B in FIG. 2 according to the present invention;
FIG. 5 is a schematic cross-sectional view of the upper mold of the present invention in a contracted state;
FIG. 6 is an enlarged view of the structure of FIG. 5 at C;
FIG. 7 is a schematic cross-sectional view illustrating the extended state of the upper mold according to the present invention;
FIG. 8 is a schematic cross-sectional view of a feeding structure according to the present invention;
FIG. 9 is a flow chart of a method of use of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a base; 2. a hydraulic mechanism; 3. an upper die; 31. pressing a plate; 32. a sleeve; 321. an inner arc plate; 33. a housing; 331. an outer pressure ring; 332. a spring plate; 333. a trigger ring; 34. an extension spring; 35. a pull rod; 351. an outer arc plate; 36. a connecting rod; 361. an articulation member; 362. a limiting baffle; 4. a lower die; 41. a base plate; 42. a fixing member; 43. a platform; 44. a wedge block; 45. a trigger spring; 5. a telescopic rod; 6. a feeding track; 7. a limiting plate; 8. a limiting spring; 9. a support frame; 10. a notch; 11. a slide rail; 12. a feeding plate.
Detailed Description
Referring to fig. 1-9, the present invention provides a technical solution: the riveting device comprises a base 1, wherein a hydraulic mechanism 2 is installed on the base 1 through a support, an upper die 3 is installed at the telescopic end of the hydraulic mechanism 2, a lower die 4 installed on the base 1 is arranged right below the upper die 3, and a feeding structure used for feeding riveting nuts to the position right below the upper die 3 is installed on the upper surface of the base 1;
the upper die 3 comprises a pressing plate 31 fixedly connected with the hydraulic mechanism 2, the bottom of the pressing plate 31 is fixedly connected with a sleeve 32, the outer wall of the pressing plate 31 is sleeved with a shell 33, the outer wall of the shell 33 is fixedly connected with an outer ring 331 used for pressing down a rivet nut, the inner wall of the shell 33 is fixedly connected with a trigger ring 333, the inner wall of the sleeve 32 is fixedly connected with a tension spring 34, the bottom of the tension spring 34 is fixedly connected with a pull rod 35 in sliding connection with the sleeve 32, the side walls of the sleeve 32 and the pull rod 35 are hinged with connecting rods 36 which are distributed in a circumferential array mode by the axis of the sleeve 32, the sleeve 32 and the pull rod 35 are respectively hinged with an inner arc plate 321 and an outer arc plate 351 through the connecting rods 36, a cutting knife composed of the inner arc plate 321 and the outer arc plate 351 is arranged in the shell 33, the cutting knife is small in size, the top outer diameter is the same as the outer diameter of the shell 33, and the bottom outer diameter is the same as the inner diameter of the rivet nut;
when the device works, a workpiece to be processed is placed on the lower die 4, the rivet nut is fed between the upper die 3 and the lower die 4 by the feeding structure, the hydraulic mechanism 2 is started, the telescopic end of the hydraulic mechanism 2 drives the sleeve 32 to descend through the pressing plate 31, the shell 33 descends along with the action of gravity, the sleeve 32 drives the pull rod 35 to descend through the extension spring 34 in a free state, and the inner arc plate 321 and the outer arc plate 351 which are hinged with the sleeve 32 and the pull rod 35 through the connecting rod 36 descend along with the pull rod;
firstly, the outer shell 33 penetrates into the rivet nut, the outer shell 33 stops descending after the outer ring 331 contacts the rivet nut, the sleeve 32 drives the pull rod 35 to continue descending through the extension spring 34 until the outer arc plate 351 positioned below the inner arc plate 321 contacts the workpiece, the outer end of the connecting rod 36 hinged to the outer arc plate 351 stops descending, the sleeve 32 and the pull rod 35 still drive the inner end of the connecting rod 36 to continue descending, so that the outer end of the connecting rod 36 drives the outer arc plate 351 to move towards the periphery, when the connecting rod 36 hinged to the outer arc plate 351 is horizontal, the outer arc plate 351 is completely unfolded and the top of the outer arc plate contacts the bottom of the outer shell 33, the sleeve 32 continues descending, the outer arc plate 351 starts to move back towards the center, meanwhile, the inner arc plate 321 contacts the workpiece and moves towards the periphery, until the inner arc plate 321 contacts the outer arc plate 351, the inner arc plate 321 pushes the outer arc plate 351 towards the periphery, the outer arc plate 351 moves towards the periphery again, the other end of the connecting rod 36 hinged to the outer arc plate 351 drives the pull rod 35 to move upwards, the sleeve 32 moves upwards on the pull rod 35 to descend, so that the extension spring 34 is compressed, when the connecting rod 36 is close to horizontal, the inner arc plate 321 and the outer arc plate 351 are completely unfolded and form a complete cylindrical cutting knife, at the moment, the sleeve 32 contacts the trigger ring 333 and presses the shell 33 downwards through the trigger ring 333, meanwhile, the cylindrical cutting knife descends along with the cylindrical cutting knife (the cylindrical cutting knife is simultaneously subjected to flat downward pressure at the bottom of the shell 33, so that the cutting knife can keep a cylindrical shape and descend), the cutting knife performs hole opening on a workpiece, after the workpiece is opened, the pressing plate 31 continues to descend, after the outer ring 331 contacts the rivet nut, the outer ring is separated from the feeding structure and vertically downwards along with the shell 33, the rivet nut penetrates through the hole of the workpiece, deforms under the action of the lower die 4 and depends on the workpiece to complete riveting of the rivet nut and the workpiece, the riveting workpiece is completed through the deformation of the riveting nut, so that the problem that the strength of the workpiece is higher than that of the riveting nut in the process of pressing the riveting nut, the riveting nut deforms before the hole is opened, the hole cannot be opened on the workpiece through the riveting nut, and the pressing riveting work cannot be completed is solved;
after a workpiece is drilled, the tension spring 34 loses the resistance of the workpiece to push the pull rod 35 to descend, the pull rod 35 pushes the outer arc plate 351 to descend through the non-horizontal connecting rod 36, so that the outer arc plate 351 and the inner arc plate 321 are separated and are at different heights, a height difference is generated between the outer arc plate 351 and the inner arc plate 321, interference between the recovered inner arc plate 321 and the outer arc plate 351 is avoided, the outer arc plate 351 and the inner arc plate 321 naturally hang down under the action of gravity, then the press plate 31 is pulled upwards through the hydraulic mechanism 2, the shell 33 and the sleeve 32 are pulled upwards through the press plate 31, the press plate 31 pulls the pull rod 35 upwards through the tension spring 34, the sleeve 32 and the pull rod 35 respectively pull the inner arc plate 321 and the outer arc plate upwards through the connecting rod 36 hinged to the sleeve, the inner arc plate 321 and the outer arc plate 351 are both in a separated state, the rivet nut cannot be contacted in the upward moving process until the upper die 3 is reset, the feeding assembly is retracted to complete the whole rivet nut work, and the sequential circulation is realized, the work of drilling and the purchase 351 of the rivet nut can be completed by a single device, the purchase cost and the maintenance cost is reduced without considering the problem;
according to the invention, the sleeve 32 and the pull rod 35 are descended through the pressing plate 31, the sleeve 32 and the pull rod 35 are communicated with the connecting rod 36 hinged with the sleeve to enable the inner arc plate 321 and the outer arc plate 351 to be unfolded and to form a cylindrical cutting knife, the cutting knife opens a hole in a workpiece, the rivet nut on the shell 33 enters the hole in the workpiece, the shell 33 and the lower die 4 extrude the rivet nut to enable the rivet nut to deform and be riveted with the workpiece, the tension spring 34 loses the resistance of the workpiece after opening the hole and stretches to enable the pull rod 35 to descend, the pull rod 35 separates the outer arc plate 351 from the inner arc plate 321 through the connecting rod 36, the outer arc plate 351 descends under the action of gravity and naturally hangs down, the inner arc plate 321 loses the resistance of the outer arc plate 351 and naturally hangs down, when the sleeve 32 ascends, the inner arc plate 321 and the outer arc plate 351 can penetrate through the rivet nut on the workpiece and reset, compared with the mode that the hole is opened on the workpiece in advance, and then the rivet nut is pressed into the hole of the workpiece;
the invention can complete the tapping and press riveting work by only one set of equipment, thus reducing the cost for purchasing a plurality of sets of equipment and maintaining, and greatly reducing the purchase and use cost (the number of required workers is reduced by a single piece of equipment, so that the cost of the equipment in use) and the maintenance cost of the equipment for riveting the nut without the eccentric condition of the riveting nut and the workpiece; compared with a mode that the riveting nut is pressed forcibly directly to open the hole in the workpiece, the method has the advantages that the requirement on the strength of the riveting nut is lower, the riveting nut is not required to be used for opening the hole in the workpiece, the problem that the riveting nut is deformed due to the fact that the strength of the riveting nut is lower than that of the workpiece, the workpiece cannot be opened due to the fact that the riveting nut is deformed, and the riveting work cannot be completed is solved. The recycling cost of the workpieces is reduced.
As a further scheme of the invention, the feeding structure comprises an expansion link 5 which is arranged on the base 1 through a bracket, a feeding plate 12 with a U-shaped structure is arranged at the movable end of the expansion link 5, a feeding track 6 is arranged above the feeding plate 12, the tail end of the feeding track 6 is positioned above the retracted state of the feeding plate 12 and is provided with a feed opening, a limiting plate 7 with a chamfer at the top is connected to the inner wall of the feeding plate 12 in a sliding manner, and a limiting spring 8 is arranged between the limiting plate 7 and the feeding plate 12;
when the riveting device works, the feeding plate 12 of the U-shaped structure at the end part is controlled by the movable end of the telescopic rod 5 to horizontally move, so that the feeding plate 12 reciprocates between the feeding rail 6 and the upper die 3, when the feeding plate 12 passes through a feed opening at the bottom of the feeding rail 6, a rivet nut falls down, the rivet nut is connected with a post by the limiting plate 7, then the feeding plate 12 sends the rivet nut to the position below the upper die 3, after the outer ring 331 contacts the rivet nut, pressure is applied to the limiting plate 7 through the rivet nut, the limiting plate 7 moves towards the periphery, so that the rivet nut can fall along with the shell 33 and enter a hole formed by a cutting knife along the shell 33, the limiting spring 8 is used for resetting the limiting plate 7, the rivet nut is conveniently supported again, the bottom of the rivet nut on the feeding rail 6 is blocked by the movable end of the telescopic rod 5 and cannot fall down, only when the feeding plate 12 passes through again, the rivet nut can fall down, the structure is simple, the operation cost of equipment can be reduced, meanwhile, automatic conveying of the rivet nut is realized, and the telescopic rod 5 can be matched with a distance measuring instrument to accurately convey the rivet nut directly below the upper die 3;
as a further scheme of the invention, a support frame 9 for limiting the feeding plate 12 in the extending state is arranged at the top of the base 1 through a support, a notch 10 matched with the feeding plate 12 is formed in the side wall of the support frame 9, and chamfers are arranged on both the notch 10 and the feeding plate 12;
when the rivet nuts are fed below the upper die 3 by the telescopic rod 5, the support frame 9 limits the extension length of the movable end of the telescopic rod 5, the phenomenon that the extension length of the movable end of the telescopic rod 5 is too long, so that the rivet nuts are eccentric with the upper die 3, riveting of workpieces and the rivet nuts is influenced, and after the feeding plate 12 is inserted into the notch 10, the support frame 9 can support the free end of the feeding plate 12, so that the phenomenon that the feeding plate 12 is inclined, so that the rivet nuts are eccentric, and the shell 33 is influenced to penetrate through the rivet nuts is avoided;
as a further scheme of the invention, the telescopic rod 5 and the support frame 9 are both in threaded connection with bolts, the telescopic rod 5 and the support frame 9 are both in sliding connection with the slide rail 11 through bolts, and the slide rail 11 is both fixedly connected with the base 1 through a support;
before the work, through sliding telescopic link 5 and support frame 9 to the position of difference on the slide rail 11, then through the bolt locking on telescopic link 5 and the support frame 9, can adjust the height of 5 expansion end delivery sheet 12 of telescopic link, the distance between delivery sheet 12 and the lower mould 4 is different, can place the work piece of different thickness and the rivet nut of different length, make inner arc board 321 and outer arc board 351 expand and constitute the cutting knife at different heights, make the device can use the work piece of more thickness, also can just use the rivet nut of different length. The application range of the device is improved;
as a further scheme of the present invention, the lower mold 4 includes a bottom plate 41 fixed with the base 1, fixing members 42 having a feed opening at the center of the bottom plate 41 and arranged in a circumferential array around the axis of the feed opening, the tops of the fixing members 42 are fixedly connected with a platform 43 together, the fixing members 42 are all slidably connected with wedge blocks 44, and a trigger spring 45 is fixedly connected between the wedge blocks 44 and the fixing members 42;
after a workpiece on the platform 43 is drilled, the wedge block 44 blocks the inner arc plate 321 from descending, so that the situation that the inner arc plate 321 descends along with the outer arc plate 351 to cause that the gap between the inner arc plate 321 and the outer arc plate 351 is too small, and the outer arc plate 351 is blocked by the inner arc plate 321 when rotating around the circumference of the hinged point of the pull rod 35 and the connecting rod 36 to influence the recovery of the outer arc plate 351 can be avoided; when the rivet nut contacts the wedge-shaped block 44 and pushes the wedge-shaped block 44 towards the periphery and stretches the trigger spring 45 until the rivet nut contacts the bottom plate 41, the bottom plate 41 enables the rivet nut to deform, the influence of the inner arc plate 321 on the recovery of the outer arc plate 351 is reduced while the riveting of the rivet nut and a workpiece is not influenced, and the interference of the inner arc plate 321 and the outer arc plate 351 is avoided, so that the rivet nut cannot be taken into the shell 33 and the influence on the next use is influenced;
as a further scheme of the present invention, hinged members 361 rotatably connected to the connecting rod 36 are disposed between the sleeve 32, the pull rod 35 and the connecting rod 36, and a limit baffle 362 which is L-shaped and used for limiting the connecting rod 36 to be vertical is fixedly connected to the bottom of the hinged members 361;
when the inner arc plate 321 and the outer arc plate 351 are retracted into the outer shell 33, the connecting rod 36 rotates around the hinge 361, an included angle between the connecting rod 36 and the hinge 361 is continuously reduced, the limit baffle 362 can prevent the connecting rod 36 from going vertically downwards, and when the connecting rod is used again, the pull rod 35 has a risk of being broken, so that the inner arc plate 321 and the outer arc plate 351 cannot form a complete cutting knife, the hole opening operation of a workpiece is influenced, and the subsequent process cannot be continued;
as a further scheme of the present invention, the bottom of the outer ring 331 is fixedly connected with a spring plate 332;
when outer pressing ring 331 contacts rivet the nut, spring plate 332 plays the effect of protection to riveting the nut, reduces outer pressing ring 331 and leads to riveting nut surface deformation, and shell 33 does not rise when clamp plate 31 rises simultaneously, and outer pressing ring 331 resets and makes shell 33 shift up one section distance for produce the clearance between shell 33 and the cutting knife, reduce shell 33 and retrieve the frictional resistance who causes to outer arc board 351, lead to outer arc board 351 to retrieve the difficulty.
An automatic nut riveting method comprises the following steps:
firstly, in the feeding process, a workpiece is placed on a lower die 4, a feeding plate 12 is moved by a telescopic rod 5, when the feeding plate 12 passes through a feeding rail 6, riveting nuts are fed onto the feeding plate 12, and the telescopic rod 5 feeds the riveting nuts between the upper die 3 and the lower die 4 through the feeding plate 12;
secondly, enabling cutting knife parts to penetrate through the rivet nuts, enabling the hydraulic mechanism 2 to drive the pressing plate 31 to descend, enabling the sleeve 32 and the pull rod 35 to drive the inner arc plate 321 and the outer arc plate 351 to descend through the upper die 3 hinged with the sleeve and the pull rod 35, enabling the shell 33 to lose support and naturally fall under the action of gravity, and enabling the shell 33 to stop descending when the outer ring 331 contacts the rivet nuts after the shell 33 penetrates through the rivet nuts;
step three, assembling the cutting knife, wherein the sleeve 32 and the pull rod 35 continuously descend, the outer arc plate 351 and the inner arc plate 321 contact the workpiece successively, the outer arc plate 351 and the inner arc plate 321 are subjected to resistance after contacting the workpiece, and move around successively under the action of the inclined connecting rod 36, and the inner arc plate 321 abuts against the moved-back outer arc plate 351 and forms a cylindrical cutting knife;
step four, drilling a hole on the workpiece, continuously descending the sleeve 32 and the pull rod 35, drilling the hole on the workpiece by a cutting knife consisting of the inner arc plate 321 and the outer arc plate 351, separating the inner arc plate 321 and the outer arc plate 351 at different heights by the extension spring 34 after drilling, naturally hanging the inner arc plate 321 and the outer arc plate 351,
fifthly, riveting the rivet nut with the workpiece, in the process that the sleeve 32 and the pull rod 35 continuously descend, when the pressing plate 31 contacts the trigger ring 333, the shell 33 presses the rivet nut downwards through the outer pressure ring 331, so that the rivet nut enters the workpiece hole, the shell 33 and the lower die 4 extrude the rivet nut to deform, and the rivet nut is riveted with the workpiece
And sixthly, taking out relevant parts of the cutting knife, moving the pressure plate 31 upwards by the hydraulic mechanism 2, moving the sleeve 32 and the pull rod 35 upwards, and taking out the inner arc plate 321, the outer arc plate 351 and the shell 33 from the rivet nut in sequence.
Claims (8)
1. The utility model provides an automatic rivet nut mould, includes base (1), its characterized in that: the riveting machine is characterized in that a hydraulic mechanism (2) is mounted on the base (1) through a support, an upper die (3) is mounted at the telescopic end of the hydraulic mechanism (2), a lower die (4) mounted on the base (1) is arranged right below the upper die (3), and a feeding structure for feeding riveting nuts to the position right below the upper die (3) is mounted on the upper surface of the base (1);
go up mould (3) including clamp plate (31) with hydraulic pressure mechanism (2) fixed connection, clamp plate (31) bottom fixedly connected with sleeve pipe (32), clamp plate (31) outer wall cover is equipped with shell (33), shell (33) outer wall fixedly connected with is used for pressing down outer clamping ring (331) of riveting the nut, shell (33) inner wall fixedly connected with triggers ring (333), sleeve pipe (32) inner wall fixedly connected with extension spring (34), extension spring (34) bottom fixedly connected with and sleeve pipe (32) sliding connection's pull rod (35), sleeve pipe (32) and pull rod (35) lateral wall all articulate connecting rod (36) that are circumference array and arrange with sleeve pipe (32) axis, sleeve pipe (32) and pull rod (35) articulate through connecting rod (36) respectively have inner arc board (321) and outer arc board (351), be provided with the cutting knife of constituteing by inner arc board (321) and outer arc board (351) in shell (33), big and top external diameter is the same with shell (33) external diameter, bottom and nut internal diameter are the same down on the cutting knife.
2. The automatic rivet nut die of claim 1, characterized in that: pay-off structure includes telescopic link (5) through the support mounting on base (1), delivery sheet (12) of U type structure are installed to telescopic link (5) expansion end, delivery sheet (12) top sets up by pay-off track (6), pay-off track (6) end is located the top that delivery sheet (12) withdrawed the state and has seted up the feed opening, delivery sheet (12) inner wall sliding connection has the top to be provided with limiting plate (7) of chamfer, install spacing spring (8) between limiting plate (7) and delivery sheet (12).
3. The automatic rivet nut die of claim 2, characterized in that: the support frame (9) used for limiting the extending state feeding plate (12) is installed at the top of the base (1) through a support, notches (10) matched with the feeding plate (12) are formed in the side wall of the support frame (9), and chamfers are arranged on the notches (10) and the feeding plate (12).
4. The automatic rivet nut die of claim 3, characterized in that: the telescopic rod (5) and the support frame (9) are connected with bolts in a threaded mode, the telescopic rod (5) and the support frame (9) are connected with the sliding rail (11) in a sliding mode through the bolts, and the sliding rail (11) is fixedly connected with the base (1) through the support.
5. The automatic rivet nut die of claim 1, characterized in that: lower mould (4) include bottom plate (41) fixed with base (1), the feed opening has been seted up at bottom plate (41) center and fixed part (42) arranged around feed opening axis circumference array, the common fixedly connected with platform (43) in fixed part (42) top, the equal sliding connection of fixed part (42) has wedge (44), fixedly connected with trigger spring (45) between wedge (44) and fixed part (42).
6. The automatic rivet nut die of claim 5, characterized in that: all be provided with between sleeve pipe (32), pull rod (35) and connecting rod (36) and rotate articulated elements (361) of being connected with connecting rod (36), equal fixedly connected with in articulated elements (361) bottom is the L type and is used for restricting the vertical limit baffle (362) of connecting rod (36).
7. The automatic rivet nut die of claim 6, characterized in that: the bottom of the outer pressure ring (331) is fixedly connected with a spring plate (332).
8. An automatic nut riveting method is suitable for the device of any one of claims 1 to 7, and is characterized in that: the method comprises the following steps:
firstly, in the feeding process, a workpiece is placed on a lower die (4), a feeding plate (12) is moved by a telescopic rod (5), when the feeding plate (12) passes through a feeding track (6), riveting nuts are fed onto the feeding plate (12), and the telescopic rod (5) feeds the riveting nuts to a position between the upper die (3) and the lower die (4) through the feeding plate (12);
secondly, enabling cutting knife parts to penetrate through the rivet nuts, enabling the hydraulic mechanism (2) to drive the pressing plate (31) to descend, enabling the sleeve (32) and the pull rod (35) to descend along with the pressing plate, enabling the sleeve (32) and the pull rod (35) to drive the inner arc plate (321) and the outer arc plate (351) to descend through the upper die (3) hinged with the sleeve (32) and the pull rod (35), enabling the shell (33) to lose support and naturally fall under the action of gravity, and enabling the shell (33) to stop descending when the outer pressure ring (331) contacts the rivet nuts after the shell (33) penetrates through the rivet nuts;
step three, assembling a cutting knife, wherein the sleeve (32) and the pull rod (35) continue to descend, the outer arc plate (351) and the inner arc plate (321) contact the workpiece successively, the outer arc plate (351) and the inner arc plate (321) are subjected to resistance after contacting the workpiece, and move around successively under the action of the inclined connecting rod (36), and the inner arc plate (321) abuts against the moved-back outer arc plate (351) and forms a cylindrical cutting knife;
step four, drilling a hole on the workpiece, continuously descending the sleeve (32) and the pull rod (35), drilling the hole on the workpiece by a cutting knife consisting of an inner arc plate (321) and an outer arc plate (351), separating the inner arc plate (321) and the outer arc plate (351) at different heights by an extension spring (34) after drilling, naturally hanging the inner arc plate (321) and the outer arc plate (351),
fifthly, riveting the rivet nut and the workpiece, in the process that the sleeve (32) and the pull rod (35) continue to descend, when the pressing plate (31) contacts the trigger ring (333), the shell (33) presses the rivet nut downwards through the outer pressing ring (331) to enable the rivet nut to enter a workpiece hole, the shell (33) and the lower die (4) extrude the rivet nut to deform, and the rivet nut and the workpiece are riveted
And sixthly, taking out relevant parts of the cutting knife, moving the pressing plate (31) upwards by the hydraulic mechanism (2), moving the sleeve (32) and the pull rod (35) upwards, and taking out the inner arc plate (321), the outer arc plate (351) and the shell (33) from the rivet nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210811793.XA CN115229060B (en) | 2022-07-11 | 2022-07-11 | Automatic nut riveting die and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210811793.XA CN115229060B (en) | 2022-07-11 | 2022-07-11 | Automatic nut riveting die and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115229060A true CN115229060A (en) | 2022-10-25 |
| CN115229060B CN115229060B (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210811793.XA Active CN115229060B (en) | 2022-07-11 | 2022-07-11 | Automatic nut riveting die and method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117620671A (en) * | 2024-01-19 | 2024-03-01 | 海斯坦普汽车组件（昆山）有限公司 | Pressing riveting mechanism and method for preventing pressing riveting nut from inclining |
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| US5522129A (en) * | 1994-02-10 | 1996-06-04 | Yugenkaisha Shinjo Seisakusho | Apparatus for automatically fixing the self-piercing nuts |
| JP2009150478A (en) * | 2007-12-20 | 2009-07-09 | Nippon Pop Rivets & Fasteners Ltd | Method and structure for fixing fastened member |
| CN103644187A (en) * | 2006-06-01 | 2014-03-19 | 形状连接技术有限公司及两合公司 | Rivet nut or rivet bolt and combination of a rivet nut or a rivet bolt with a sheet metal part |
| CN103978116A (en) * | 2014-05-28 | 2014-08-13 | 苏州艾酷玛赫设备制造有限公司 | Novel pressing riveter for pressing riveting nuts |
| CN104924059A (en) * | 2015-06-07 | 2015-09-23 | 宁波敏实汽车零部件技术研发有限公司 | Automatic nut riveting device and automobile luggage carrier workpiece nut riveting method |
| CN212469423U (en) * | 2020-05-18 | 2021-02-05 | 上海众达汽车冲压件有限公司 | Novel riveting equipment punches a hole |
| CN213763756U (en) * | 2020-12-02 | 2021-07-23 | 长春英纳维特自动化设备有限公司 | Non-porous self-piercing riveting nut equipment for metal materials |
| CN214683903U (en) * | 2021-06-15 | 2021-11-12 | 佛山市网冠金属制品有限公司 | Automatic squeeze riveter of outer container bottom plate |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5522129A (en) * | 1994-02-10 | 1996-06-04 | Yugenkaisha Shinjo Seisakusho | Apparatus for automatically fixing the self-piercing nuts |
| CN103644187A (en) * | 2006-06-01 | 2014-03-19 | 形状连接技术有限公司及两合公司 | Rivet nut or rivet bolt and combination of a rivet nut or a rivet bolt with a sheet metal part |
| JP2009150478A (en) * | 2007-12-20 | 2009-07-09 | Nippon Pop Rivets & Fasteners Ltd | Method and structure for fixing fastened member |
| CN103978116A (en) * | 2014-05-28 | 2014-08-13 | 苏州艾酷玛赫设备制造有限公司 | Novel pressing riveter for pressing riveting nuts |
| CN104924059A (en) * | 2015-06-07 | 2015-09-23 | 宁波敏实汽车零部件技术研发有限公司 | Automatic nut riveting device and automobile luggage carrier workpiece nut riveting method |
| CN212469423U (en) * | 2020-05-18 | 2021-02-05 | 上海众达汽车冲压件有限公司 | Novel riveting equipment punches a hole |
| CN213763756U (en) * | 2020-12-02 | 2021-07-23 | 长春英纳维特自动化设备有限公司 | Non-porous self-piercing riveting nut equipment for metal materials |
| CN214683903U (en) * | 2021-06-15 | 2021-11-12 | 佛山市网冠金属制品有限公司 | Automatic squeeze riveter of outer container bottom plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117620671A (en) * | 2024-01-19 | 2024-03-01 | 海斯坦普汽车组件（昆山）有限公司 | Pressing riveting mechanism and method for preventing pressing riveting nut from inclining |
| CN117620671B (en) * | 2024-01-19 | 2024-04-12 | 海斯坦普汽车组件（昆山）有限公司 | Pressing riveting mechanism and method for preventing pressing riveting nut from inclining |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115229060B (en) | 2023-05-09 |
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