CN116475720A - Self-punching riveting punch and self-punching riveting equipment thereof - Google Patents
Self-punching riveting punch and self-punching riveting equipment thereof Download PDFInfo
- Publication number
- CN116475720A CN116475720A CN202310749797.4A CN202310749797A CN116475720A CN 116475720 A CN116475720 A CN 116475720A CN 202310749797 A CN202310749797 A CN 202310749797A CN 116475720 A CN116475720 A CN 116475720A
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- Prior art keywords
- nut
- hole
- rod
- supporting
- self
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- 238000004080 punching Methods 0.000 title claims abstract description 44
- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 239000002699 waste material Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000005484 gravity Effects 0.000 claims abstract description 3
- 210000000078 claw Anatomy 0.000 claims description 23
- 238000010008 shearing Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 230000004308 accommodation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000001632 homeopathic effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/001—Article feeders for assembling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/001—Article feeders for assembling machines
- B23P19/006—Holding or positioning the article in front of the applying tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
Abstract
The invention discloses a self-punching riveting punch, which comprises a base body, wherein a nut transfer channel and a through hole which is arranged in the base body in a penetrating way are arranged in the base body; a nut feeding mechanism; punching a rod; a nut pushing mechanism; the nut supporting mechanism is arranged on the base body at two sides of the through hole and comprises a supporting part for supporting two lateral wings of the nut and a first driving mechanism capable of driving the supporting part into the through hole; when the supporting part enters the through hole, the supporting part can support the nut in the through hole, so that the nut does not fall under the action of self gravity; the stamping rod is internally provided with a containing cavity along the axial direction of the stamping rod, the containing cavity is internally provided with a push rod with the axial line collinear with the axial line of the stamping rod, and the push rod can reciprocate in the containing cavity under the drive of the second driving mechanism. The invention aims at the nut with a specific model, namely a rectangular self-piercing rivet nut, and solves the problem that waste materials cannot be blanked in the stamping process.
Description
Technical Field
The invention belongs to a punching self-piercing riveting technology, and particularly relates to a self-piercing riveting punch for a rectangular self-piercing riveting nut and self-piercing riveting equipment thereof.
Background
The rectangular self-piercing riveting nut is a common model in the self-piercing riveting technology, and has a structure shown in fig. 1, and comprises a base body 61, a shearing part 62 arranged at the center of the base body 61, a central hole 63 formed in the base body 61, and grooves 64 symmetrically arranged at two sides of the shearing part 62, wherein the central hole 63 penetrates through the shearing part 62, and threads are arranged in the central hole 63. Taking the position shown in fig. 1 as an example, downward protrusions provided on the left and right side edges of the base 61 are referred to as flanks 65.
The principle of connecting the rectangular self-piercing riveting nut with the part is that a lower die with a waste cavity is arranged below the punch, when the rectangular self-piercing riveting nut is stamped to be in contact with the part, the part is subjected to plastic deformation under extrusion force, and part of materials enter the groove 64, so that the rectangular self-piercing riveting nut is fixedly connected with the part. And then the other parts are connected with the rectangular self-piercing rivet nut through the central hole of the rectangular self-piercing rivet nut in a threaded manner, so that the connection of the two parts is realized. In the above process, the shearing part 62 shears the part material under the cooperation of the lower die, and part of the part material contacting with the shearing part 62 is cut off, so that the waste falls into the waste cavity of the lower die.
The self-piercing riveting process in the prior art has the defect that a gap exists between a shearing part of the rectangular self-piercing riveting nut and an opening port of the lower die, so that when shearing is performed, the material removed from the part cannot be blanked because the material is not thoroughly separated from the original part. That is, the material to be removed cannot be separated from the part and cannot fall into the scrap chamber, resulting in poor riveting.
Disclosure of Invention
The invention aims to provide a self-piercing riveting punch and self-piercing riveting equipment thereof, which can always ensure that the material to be removed is separated from a part in the self-piercing riveting process.
The technical scheme for solving the problems is as follows: a self-piercing riveting punch adapted for self-piercing riveting of a rectangular self-piercing riveting nut, comprising:
the nut conveying device comprises a base body, wherein a nut conveying channel and a through hole which is communicated with the base body are arranged in the base body, the through hole is perpendicular to the nut conveying channel, and the through hole is communicated with the nut conveying channel;
the nut feeding mechanism is suitable for feeding nuts into the nut transferring channel;
the punching rod is arranged through the through hole and can linearly move in the through hole;
the nut pushing mechanism is suitable for conveying the nut into the through hole along the nut transferring channel and is positioned right below the punching rod so that the axis of the punching rod is collinear with the axis of the nut center hole;
the nut supporting mechanism is arranged on the base body at two sides of the through hole and comprises a supporting part for supporting two lateral wings of the nut and a first driving mechanism capable of driving the supporting part into the through hole; when the supporting part enters the through hole, the supporting part can support the nut in the through hole, so that the nut does not fall under the action of self gravity; the supporting force provided by the supporting part is smaller than the stamping force of the stamping rod on the nut, and when the stamping rod applies the stamping force on the nut, the supporting part withdraws from the through hole;
an accommodating cavity is arranged in the stamping rod along the axial direction of the stamping rod, a push rod with the axial line collinear with the axial line of the stamping rod is arranged in the accommodating cavity, and the push rod can reciprocate in the accommodating cavity under the drive of a second driving mechanism; in a natural state, the ejector rod extends out of the accommodating cavity and exceeds the stamping end face of the stamping rod; the ejector rod can be freely inserted into and penetrates through the center hole of the nut.
In an alternative solution, the supporting part and the nut transferring channel are on the same horizontal plane, so that the nuts are smoothly sent to the supporting part, and the supporting part is positioned right below the punching rod.
In an alternative scheme, the first driving mechanism comprises shafts arranged at two sides of the through hole and fixed on the base body, and torsion springs arranged on the shafts, and the supporting parts are sleeved on the shafts; the supporting part is connected with the torsion spring and can rotate around the shaft under the action of the torsion spring so as to enter or exit the through hole.
In an alternative scheme, the supporting part comprises a body, the supporting claw arranged on the body, a torsion spring clamping groove arranged on the body and a sleeve joint hole arranged on the body;
the support part accommodating space is arranged on the seat body and positioned at two sides of the through hole, the support part accommodating space is communicated with the through hole, the support part accommodating space is provided with a torsion spring clamping groove, the shaft is arranged in the support part accommodating space, and the shaft is in clearance fit with the sleeve joint hole;
one end of the torsion spring is clamped into the torsion spring clamping groove on the body, and the other end of the torsion spring is clamped into the torsion spring clamping groove in the accommodating space of the supporting part;
the supporting claw is used for supporting the nut, the supporting surface of the supporting claw is a plane, the supporting claw can enter or exit the through hole from the communication area between the accommodating space of the supporting part and the through hole, and the natural state of the supporting claw after entering the through hole is that the supporting surface is vertical to the axis of the stamping rod;
the supporting claws are arranged at the tail end of the nut transferring channel, and the two supporting claws are arranged in a mirror symmetry mode.
In an alternative scheme, the second driving mechanism comprises an elastic piece arranged at one end of the ejector rod far away from the through hole and a plug for plugging the elastic piece in the accommodating cavity, and the plug is fixedly connected with the stamping rod;
one end of the elastic piece is connected with the plug, the other end of the elastic piece is connected with the ejector rod, and the elastic piece can drive the ejector rod to linearly move in the accommodating cavity so as to realize that the ejector rod is inserted into or withdrawn from the central hole of the nut;
the ejector rod cannot be completely removed from the accommodating cavity.
In an alternative scheme, the punching end of the punching rod is provided with an adsorption device capable of adsorbing the nut.
In an alternative scheme, a fixed seat and a driving device for driving the fixed seat to move towards the seat body are arranged above the seat body, and the non-punching end of the punching rod is fixedly connected with the fixed seat;
a guide cylinder is arranged on one side of the base body facing the fixed seat, a guide channel is arranged on the fixed seat corresponding to the guide cylinder, and the guide cylinder is inserted into the guide channel and can linearly move in the guide channel;
a cavity is arranged in the guide cylinder, a return spring is arranged in the cavity, and the return spring is enclosed in the cavity and the guide channel space;
when the driving device drives the fixed seat to move towards the seat body, the reset spring is compressed;
when the driving force of the driving device is released, the reset spring rebounds to drive the fixed seat to be far away from the seat body.
In an alternative scheme, the nut pushing mechanism comprises a push rod arranged in the nut transferring channel and a third driving mechanism for driving the push rod to linearly move.
In an alternative scheme, the nut feeding mechanism comprises a conveying pipeline, and the conveying pipeline can enable nuts to be sequentially conveyed in sequence;
the output end of the conveying pipeline is in butt joint with the seat body and is communicated with the nut conveying channel.
Correspondingly, the invention also provides self-piercing riveting equipment, which is suitable for self-piercing riveting parts and comprises:
the lower die is provided with a waste cavity communicated with the outside, an opening of the waste cavity is opposite to the stamping rod, and a shearing protrusion matched with the nut for shearing materials is arranged in the area of the opening;
the method comprises the steps of,
the self-punching riveting punch.
The invention has the remarkable effects that: the nut with the specific model is a rectangular self-piercing rivet nut, and the problem that waste materials cannot be blanked in the stamping process is solved. Specifically, the supporting part capable of supporting the nut is arranged to support the nut, and the ejector rod is inserted into the central hole of the nut before the punching rod is punched. During punching, the nut and the lower die are matched to shear materials, and removed waste is ejected into the waste cavity by the ejector rod in a homeopathic manner, so that automatic blanking of the waste can be ensured for each punching.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic view of a rectangular self-piercing rivet nut.
Fig. 2 is a schematic diagram of the overall structure of the self-piercing riveting punch.
Fig. 3 is a cross-sectional view in the direction a of fig. 2 (cross-hatching is not done for the sake of clarity).
Fig. 4 is a partial enlarged view of fig. 3.
Fig. 5 is a sectional view in the direction B of fig. 2 (cross-hatching is not done for the sake of clarity).
Fig. 6 is a cut-away view of the punch bar (cross-hatching is not done for clarity).
Fig. 7 is a schematic diagram of the assembly structure of the supporting portion and the torsion spring.
Fig. 8 is a schematic view of the lower die structure.
In the figure: the device comprises a 1-seat body, a 2-nut feeding mechanism, a 3-stamping rod, a 4-nut pushing mechanism, a 5-nut supporting mechanism, a 6-nut, a 7-ejector rod, an 8-fixing seat, a 9-guide cylinder and a 10-lower die; 11-nut transfer channels, 12-through holes, 13-shafts, 14-torsion springs, 15-supporting part accommodating spaces, 16-pressing cylinders and 17-through holes; 21-a conveying pipeline; 31-accommodating cavity, 32-elastic piece, 33-plug; 41-push rod, 42-third driving mechanism; 51-supporting parts, 511-bodies, 512-supporting claws, 513-torsion spring clamping grooves and 514-sleeving holes; 61-matrix, 62-shear, 63-central hole, 64-groove, 65-flank; 81-a guide channel, 82-a return spring; 101-waste chamber, 102-shear protrusions.
Description of the embodiments
For convenience of description, the description of the relative positional relationship (e.g., up, down, left, right, etc.) of the components is described according to the layout direction of the drawings in the specification, and is not intended to limit the structure of this patent.
As shown in fig. 1 to 8, the self-piercing riveting punch is suitable for self-piercing riveting of rectangular self-piercing riveting nuts and comprises a base body 1, a nut feeding mechanism 2, a stamping rod 3, a nut pushing mechanism 4 and a nut supporting mechanism 5.
The inside of the seat body 1 is provided with a nut transfer passage 11 and a through hole 12 penetrating the seat body 1. The through hole 12 is provided perpendicular to the nut transfer passage 11, and the through hole 12 communicates with the nut transfer passage 11.
The nut feeding mechanism 2 is adapted to feed nuts into the nut transfer passage 11.
The press rod 3 is inserted into the through hole 12 and is linearly movable in the through hole 12. The cross section of the punching end of the punching rod 3 for punching the rectangular self-piercing rivet nut in this embodiment is square.
The nut pushing mechanism 4 is adapted to feed the nut 6 into the through hole 12 along the nut transfer passage 11 and directly below the press rod 3 so that the axis of the press rod 3 is collinear with the axis of the center hole 63 of the nut 6.
The nut support mechanisms 5 are provided on the base 1 on both sides of the through hole 12. The nut support mechanism 5 includes a support portion 51 for supporting the two side wings 65 of the nut 6, and a first driving mechanism that can drive the support portion 51 into the through hole 12. When the supporting portion 51 enters the through hole 12, the supporting portion 51 can support the nut 6 in the through hole 12 so that the nut 6 does not fall under the self-gravity. The supporting force provided by the supporting portion 51 is smaller than the punching force of the punch rod 3 to the nut 6. When the pressing rod 3 applies a pressing force to the nut 6, the supporting portion 51 withdraws from the through hole 12.
A containing cavity 31 is arranged in the stamping rod 3 along the axial direction of the stamping rod 3, and a push rod 7 with the axial line collinear with the axial line of the stamping rod 3 is arranged in the containing cavity 31. The ejector rod 7 can reciprocate in the accommodating cavity 31 in a linear mode under the driving of the second driving mechanism. In a natural state, the ejector rod 7 extends out of the accommodating cavity 31 and exceeds the stamping end face of the stamping rod 3. The ejector rod 7 can be freely inserted into and penetrate through the central hole 63 of the nut.
The support portion 51 is disposed on the same horizontal plane as the nut transfer passage 11 after entering the through hole 12, so that the nut 6 is smoothly fed to the support portion 51, and the support portion 51 is located directly below the punching rod.
The structure of the first driving mechanism may have various designs, in principle, the supporting portion 51 can be driven to enter the through hole 12 to support the nut 6, and then the pressing rod 3 can be driven to exit the through hole 12 when pressing, so that the nut 6 can smoothly move in the through hole 12. For example, the support portion 51 may be driven horizontally to move in and out of the through hole 12 from both sides by a cylinder, and of course, such a design requires cooperation of a slide rail, a slide groove, or the like, which is more complicated in structure and more costly. The embodiment adopts a rotary driving mode, is simpler and more applicable, and has the following structure:
comprises a shaft 13 arranged at two sides of the through hole 12 and fixed on the base body, and a torsion spring 14 arranged on the shaft 13. The supporting part 51 is sleeved on the shaft 13; the supporting portion 51 is connected to the torsion spring 14, and the supporting portion 51 is rotatable about the shaft 13 by the torsion spring 14 to enter or exit the through hole 12.
Specifically, as shown in fig. 6, the supporting portion 51 includes a main body 511, the supporting claws 512 disposed on the main body 511, a torsion spring slot 513 disposed on the main body 511, and a socket hole 514 disposed on the main body 511.
The seat body 1 is provided with support portion accommodation spaces 15 on both sides of the through hole 12. The support portion accommodation space 15 communicates with the through hole 12. A torsion spring clamping groove is arranged in the supporting part accommodating space 15. The shaft 13 is disposed in the supporting portion accommodating space 15, and the shaft 13 is in clearance fit with the socket hole 514.
One end of the torsion spring 14 is clamped into a torsion spring clamping groove 513 on the body 511, and the other end is clamped into a torsion spring clamping groove of the supporting part accommodating space 15.
The supporting claw 512 is used for supporting the nut 6, and the supporting surface of the supporting claw 512 is a plane. The supporting claw 512 can enter or exit the through hole 12 from the communication area between the supporting part accommodating space 15 and the through hole 12, and the natural state of the supporting claw 512 after entering the through hole 12 is that the supporting surface is perpendicular to the axis of the punching rod 3.
The supporting claws 512 are disposed at the end of the nut transferring channel 11, and the two supporting claws 512 are disposed in mirror symmetry.
The second drive mechanism can be designed in various ways, and in principle, the second drive mechanism can only drive the ejector rod to move linearly, for example, by adopting a pneumatic or hydraulic mode. The embodiment adopts a simpler driving mode, and the specific structure is as follows:
comprises an elastic piece 32 arranged at one end of the ejector rod 7 far away from the through hole 12 and a plug 33 for plugging the elastic piece 32 in the accommodating cavity 31. The elastic member 32 is preferably a spring. The plug 33 is fixedly connected with the stamping rod 3. One end of the elastic piece 32 is connected with the plug 33, the other end of the elastic piece is connected with the ejector rod 7, and the elastic piece 32 can drive the ejector rod 7 to linearly move in the accommodating cavity 31 so as to realize that the ejector rod 7 is inserted into or withdrawn from the central hole of the nut. The ejector pin 7 cannot be completely removed from the accommodating chamber 31. In order to prevent the ejector rod 7 from being separated from the accommodating cavity 31, the accommodating cavity 31 can be provided with two sections with different diameters, the ejector rod 7 can be provided with two sections with different diameters, the cylindrical section with larger diameter of the ejector rod 7 is arranged in the cavity with larger diameter of the accommodating cavity 31, and the cylindrical section with smaller diameter of the ejector rod 7 is arranged in the cavity with smaller diameter of the accommodating cavity 31. The elastic piece 32 and the plug are arranged in the cavity with the larger diameter of the accommodating cavity 31.
The punching end of the punching rod 3 is provided with an adsorption device capable of adsorbing the nut 6. The suction device may be a negative pressure suction mechanism or a magnet, which is preferred in this embodiment.
A fixed seat 8 and a driving device for driving the fixed seat 8 to move towards the seat body 1 are arranged above the seat body 1, and the non-punching end of the punching rod 3 is fixedly connected with the fixed seat 8.
As shown in fig. 5, a guiding cylinder 9 is disposed on a side of the base 1 facing the fixing seat 8. A guide channel 81 is arranged on the fixed seat 8 at a position corresponding to the guide cylinder 9. The guide cylinder 9 is inserted into the guide passage 81 and is linearly movable in the guide passage 81. A chamber is arranged in the guide cylinder 9, and a return spring 82 is arranged in the chamber. The return spring 82 is enclosed in the space of the chamber and the guide passage 81. It should be noted that the end of the return spring 82 of the self-piercing and riveting punch shown in fig. 2, 3 and 5 is exposed and not closed, because the fixing seat 8 of the end is assembled to other structures of the self-piercing and riveting apparatus before closing one end of the return spring 82, and in the actual structure, the exposed end of the return spring 82 is closed, but other structures are not shown in fig. 2, 3 and 5.
When the driving means drives the fixing base 8 to move toward the base body 1, the return spring 82 is compressed.
When the driving force of the driving device is released, the return spring 82 rebounds to drive the fixed seat 8 to be far away from the seat body 1.
The above-mentioned process is actually a process of punching and resetting the punch mechanism.
The nut pushing mechanism 4 includes a push rod 41 provided in the nut transfer passage 11, and a third driving mechanism 42 for driving the push rod 41 to linearly move. The third driving mechanism 42 is preferably a cylinder.
The nut feeding mechanism 2 comprises a conveying pipeline 21, and the conveying pipeline 21 can enable nuts 6 to be sequentially conveyed in sequence. The output end of the conveying pipeline 21 is in butt joint with the seat body 1 and is communicated with the nut conveying channel 11.
A feed detecting device is arranged on one side of the through hole to determine whether a nut 6 is arranged right below the punching rod 3.
The present embodiment also provides a self-piercing riveting apparatus adapted to self-piercing rivet a part, comprising a lower die 10 and the self-piercing riveting punch described above. The lower die 10 is provided with a waste cavity 101 communicated with the outside. The open mouth of the waste cavity 101 faces the stamping rod 3, and the open mouth area is provided with a shearing protrusion 102 which is matched with the nut 6 to shear materials.
The self-piercing riveting punch also comprises a pressing cylinder 16, and a through hole 17 is formed in the pressing cylinder 16. The pressing cylinder 16 is connected with the base body 1, and after the connection, the through hole 17 and the through hole 12 are in butt joint communication to jointly form a channel for punching nuts by the punching rod 3.
The removable pressure cylinder 16 is designed to be replaceable after wear, since the pressure cylinder 16 is in contact with the part during stamping, and the punch is often in contact with the part to cause wear.
The working principle of this embodiment is as follows:
the nut 6 enters the nut moving channel 11 through the delivery pipe 21, and the nut 6 enters the supporting portion 51 from the end of the nut moving channel 11 by the push rod 41, and rests on the supporting surface of the supporting claw 512. The self-punching riveting punch head integrally moves towards the lower die 10 until the pressing cylinder 16 is abutted against the part to be riveted, and meanwhile the driving device drives the fixing seat 8 to move towards the seat body 1, so that the punching rod 3 is driven to move towards the seat body 1 in the through hole 12, and the movement of the punching rod 3 drives the ejector rod 7 to be inserted into the nut center hole 63. When the stamping end face of the stamping rod 3 is abutted against the nut 6 for stamping, the part is subjected to plastic deformation under the extrusion force, and part of materials enter the groove 64, so that the rectangular self-piercing rivet nut is fixedly connected with the part, meanwhile, the shearing part 62 of the nut 6 is matched with the shearing protrusion 102 of the lower die 10 to perform material shearing, and removed waste is pushed into the waste cavity 101 by the ejector rod 7 in a homeopathic manner, so that automatic blanking of stamping waste can be ensured each time. After the stamping is completed, the compressed reset spring 82 drives the fixed seat 8 to be far away from the seat body 1, and the stamping rod 3 and the ejector rod 7 are reset.
Claims (10)
1. The utility model provides a from dashing drift is applicable to rectangle self-piercing riveting nut self-piercing riveting, its characterized in that includes:
the nut conveying device comprises a base body, wherein a nut conveying channel and a through hole which is communicated with the base body are arranged in the base body, the through hole is perpendicular to the nut conveying channel, and the through hole is communicated with the nut conveying channel;
the nut feeding mechanism is suitable for feeding nuts into the nut transferring channel;
the punching rod is arranged through the through hole and can linearly move in the through hole;
the nut pushing mechanism is suitable for conveying the nut into the through hole along the nut transferring channel and is positioned right below the punching rod so that the axis of the punching rod is collinear with the axis of the nut center hole;
the nut supporting mechanism is arranged on the base body at two sides of the through hole and comprises a supporting part for supporting two lateral wings of the nut and a first driving mechanism capable of driving the supporting part into the through hole; when the supporting part enters the through hole, the supporting part can support the nut in the through hole, so that the nut does not fall under the action of self gravity; the supporting force provided by the supporting part is smaller than the stamping force of the stamping rod on the nut, and when the stamping rod applies the stamping force on the nut, the supporting part withdraws from the through hole;
an accommodating cavity is arranged in the stamping rod along the axial direction of the stamping rod, a push rod with the axial line collinear with the axial line of the stamping rod is arranged in the accommodating cavity, and the push rod can reciprocate in the accommodating cavity under the drive of a second driving mechanism; in a natural state, the ejector rod extends out of the accommodating cavity and exceeds the stamping end face of the stamping rod; the ejector rod can be freely inserted into and penetrates through the center hole of the nut.
2. The self-piercing riveting punch as defined in claim 1, wherein: the supporting part and the nut transferring channel are on the same horizontal plane, so that the nuts are smoothly sent to the supporting part, and the supporting part is positioned right below the punching rod.
3. The self-piercing riveting punch as defined in claim 1 or 2, wherein: the first driving mechanism comprises shafts arranged at two sides of the through hole and fixed on the base body, and torsion springs arranged on the shafts, and the supporting parts are sleeved on the shafts; the supporting part is connected with the torsion spring and can rotate around the shaft under the action of the torsion spring so as to enter or exit the through hole.
4. A self-piercing riveting punch as defined in claim 3 wherein: the supporting part comprises a body, the supporting claw arranged on the body, a torsion spring clamping groove arranged on the body and a sleeving hole arranged on the body;
the support part accommodating space is arranged on the seat body and positioned at two sides of the through hole, the support part accommodating space is communicated with the through hole, the support part accommodating space is provided with a torsion spring clamping groove, the shaft is arranged in the support part accommodating space, and the shaft is in clearance fit with the sleeve joint hole;
one end of the torsion spring is clamped into the torsion spring clamping groove on the body, and the other end of the torsion spring is clamped into the torsion spring clamping groove in the accommodating space of the supporting part;
the supporting claw is used for supporting the nut, the supporting surface of the supporting claw is a plane, the supporting claw can enter or exit the through hole from the communication area between the accommodating space of the supporting part and the through hole, and the natural state of the supporting claw after entering the through hole is that the supporting surface is vertical to the axis of the stamping rod;
the supporting claws are arranged at the tail end of the nut transferring channel, and the two supporting claws are arranged in a mirror symmetry mode.
5. The self-piercing riveting punch as defined in claim 1, wherein: the second driving mechanism comprises an elastic piece arranged at one end of the ejector rod far away from the through hole and a plug for plugging the elastic piece in the accommodating cavity, and the plug is fixedly connected with the stamping rod;
one end of the elastic piece is connected with the plug, the other end of the elastic piece is connected with the ejector rod, and the elastic piece can drive the ejector rod to linearly move in the accommodating cavity so as to realize that the ejector rod is inserted into or withdrawn from the central hole of the nut;
the ejector rod cannot be completely removed from the accommodating cavity.
6. The self-piercing riveting punch as defined in claim 1, wherein: the punching end of the punching rod is provided with an adsorption device capable of adsorbing the nut.
7. The self-piercing riveting punch as defined in claim 1, wherein: a fixed seat and a driving device for driving the fixed seat to move towards the seat body are arranged above the seat body, and the non-punching end of the punching rod is fixedly connected with the fixed seat;
a guide cylinder is arranged on one side of the base body facing the fixed seat, a guide channel is arranged on the fixed seat corresponding to the guide cylinder, and the guide cylinder is inserted into the guide channel and can linearly move in the guide channel;
a cavity is arranged in the guide cylinder, a return spring is arranged in the cavity, and the return spring is enclosed in the cavity and the guide channel space;
when the driving device drives the fixed seat to move towards the seat body, the reset spring is compressed;
when the driving force of the driving device is released, the reset spring rebounds to drive the fixed seat to be far away from the seat body.
8. The self-piercing riveting punch as defined in claim 1, wherein: the nut pushing mechanism comprises a push rod arranged in the nut transferring channel and a third driving mechanism for driving the push rod to linearly move.
9. The self-piercing riveting punch as defined in claim 1, wherein: the nut feeding mechanism comprises a conveying pipeline, and the conveying pipeline can enable nuts to be sequentially arranged and conveyed in sequence;
the output end of the conveying pipeline is in butt joint with the seat body and is communicated with the nut conveying channel.
10. A self-piercing riveting apparatus adapted to self-piercing rivet a part, comprising:
the lower die is provided with a waste cavity communicated with the outside, an opening of the waste cavity is opposite to the stamping rod, and a shearing protrusion matched with the nut for shearing materials is arranged in the area of the opening;
the method comprises the steps of,
a self-piercing riveting punch as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310749797.4A CN116475720A (en) | 2023-06-25 | 2023-06-25 | Self-punching riveting punch and self-punching riveting equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310749797.4A CN116475720A (en) | 2023-06-25 | 2023-06-25 | Self-punching riveting punch and self-punching riveting equipment thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
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| CN114160743A (en) * | 2021-11-22 | 2022-03-11 | 苏州雷力紧固技术有限责任公司 | Self-piercing riveting connection device and riveting method thereof |
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| US20030164381A1 (en) * | 2002-03-01 | 2003-09-04 | Goodsmith Dale H. | Fastener feed and installation head |
| US20040181937A1 (en) * | 2003-03-19 | 2004-09-23 | Woods Harold T. | Self-diagnosing pierce nut installation apparatus |
| KR100604344B1 (en) * | 2005-12-30 | 2006-07-25 | 장성호 | Hinge pipe type head of screw tightening |
| KR20100013571A (en) * | 2008-07-31 | 2010-02-10 | 박민혜 | Insert nut supply jig for insert nut self-feeding device |
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| US20160339549A1 (en) * | 2015-05-18 | 2016-11-24 | Reo Hydro-Pierce, Inc. | Method and apparatus for installing pierce nuts |
| CN204953640U (en) * | 2015-09-01 | 2016-01-13 | 奇瑞汽车股份有限公司 | Abnormal shape of taking liftout mechanism of punching a hole |
| DE102017209118A1 (en) * | 2017-05-31 | 2018-12-06 | Robert Bosch Gmbh | PUNCHING DEVICE FOR PUTTING A PUNCH WITH A VIBRATOR SUPPORTING A STAMPING POWER, AND METHOD FOR PUNCHING WITH SUCH A PUNCHING RIVET DEVICE |
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| CN217798774U (en) * | 2022-08-19 | 2022-11-15 | 河北钛通滤清器有限公司 | Automatic riveting machine |
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