KR101641060B1 - Self piercing rivet device - Google Patents

Abstract

A self-piercing rivet device is disclosed. A self-piercing rivet device according to an embodiment of the present invention includes a frame mounted at the arm end of a robot, the both ends of the rivet device having a C-shaped skeleton disposed opposite to each other; A drill piercing unit installed at a lower portion of the anvil die in which two sheets of base material are seated on the lower side of the frame, the drill piercing unit selectively moving the mounting hole to the base material while moving up and down toward the base material; And a rivet provided on one side of the upper portion of the frame corresponding to the anvil die and rivets supplied from a rivet feeder are riveted to a mounting hole formed in the base material by a drill piercing unit with a clamper and a piston, And includes a riveting unit for mutual bonding.

Description

{SELF PIERCING RIVET DEVICE}

The present invention relates to a self-piercing rivet device, and more particularly, to a self-piercing rivet device that allows a self-piercing rivet to be joined regardless of the strength and thickness of two or more objects to be joined.

In the automobile industry, the use of aluminum alloys and plastic materials to improve fuel efficiency due to environmental problems has been aimed at reducing the weight of the vehicle body.

For this purpose, in the automobile industry, a joining method capable of replacing conventional spot welding for assembling a vehicle body is being studied.

Recently, a self-piercing rivet system has been adopted as a self-piercing rivet bonding method as a bonding method that meets this expectation.

The self-piercing rivet jointing method is different from the conventional riveting method in which a hole for riveting is formed on a joining object such as a steel plate and a rivet is inserted into the hole and then the head is molded to join the object to be joined. Or the rivet is subjected to plastic deformation by press-fitting the rivet into the object to be bonded by air pressure to join the object to be bonded.

In the self-piercing rivet jointing method as described above, for example, a self-piercing rivet made of a head and a partially hollow cylindrical shank is used to fasten the object to be joined between upper and lower plates such as a metal sheet material.

For example, the self-piercing rivet has a configuration in which the shank penetrates the upper plate of the object to be joined by punching of the setting tool and is opened outward by the anvil, and the shank is press-fitted into the lower plate with the head portion supporting the upper plate, The upper and lower plates can be joined.

Here, the punch and the anvil are generally formed in the C-frame, and the punch is fixed to one free end of the C-frame, and the anvil can be fixed to the other free end of the C-frame.

Therefore, in the self-piercing rivet system, when the object to be joined is placed between the punch and the anvil, when the rivet is pushed through the punch, the rivet passes through the upper plate and penetrates into the lower plate. So that the objects to be joined are integrally joined together while being expanded and deformed in the radial direction.

Thus, bonding techniques using self-piercing rivets can be used to bond components such as aluminum bodywork that are not easy to spot weld.

In addition, the joining technique using the self-piercing rivets not only produces joints with excellent strength and fatigue characteristics that can be easily automated in the production line, but also causes little distortion of the top surface of the sheet material around the rivets Since joints are aesthetically acceptable, they have proved successful in this context.

This self-piercing rivet joint has the following characteristics compared to spot welding and other riveting.

First, since the rivet itself passes through the upper plate and its tip extends together with the lower plate, the upper plate and the lower plate are joined to each other, so that the holes provided in the upper plate are unnecessary in the previous riveting operation.

Second, bonding with dissimilar materials is possible. That is, plastic, rubber, aluminum and steel sheet can be joined together, and aluminum and high tensile steel sheet can be joined together.

Third, the working environment is clean. That is, noise, flame, and smoke generated during spot welding are not generated, and a comfortable working environment can be created.

Fourth, the bonding cycle proceeds within a short time. That is, the operation of positioning the rivet in the riveting hole of the upper plate is omitted, and the fastening time of the rivet is very short as about 1 second, so that the riveting joint cycle can be completed within a short time.

However, in the conventional self-piercing rivet device, the rivet penetrates the upper plate through the front end and penetrates into the lower plate while being pressed into the inside of the anvil die, thereby deforming the base material. However, It is difficult to apply to a material having high tensile strength, high thickness, or three or more layers.

The matters described in the background section are intended to enhance the understanding of the background of the invention and may include matters not previously known to those skilled in the art.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a method of manufacturing a bonded object, To provide a self-piercing rivet device capable of stably bonding regardless of the strength and thickness of the object to be bonded, thereby improving the bonding rigidity without causing cracks.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a self-piercing rivet device comprising: a frame mounted on an arm end of a robot, A drill piercing unit installed at a lower portion of the anvil die in which two sheets of base material are seated on the lower side of the frame, the drill piercing unit selectively moving the mounting hole to the base material while moving up and down toward the base material; And a rivet provided on one side of the upper portion of the frame corresponding to the anvil die and rivets supplied from a rivet feeder are riveted to a mounting hole formed in the base material by a drill piercing unit with a clamper and a piston, Wherein the riveting unit is mounted on one side of the upper part of the frame corresponding to the anvil die and the clamper and the piston are slidably movable upward and downward respectively, A cylinder for moving up and down the clamper and the piston toward the upper surface of the base material depending on whether the operating pressure is supplied or not; A rail housing mounted on an upper end of the cylinder and having at least one guide rail formed in the longitudinal direction; A rotary motor connected to a guide block moving along the guide rail in the rail housing and slidably mounted upward and downward; And a rotary rod which is rotatably mounted through the center of the piston and has one end connected to the rotation shaft of the rotary motor and the other end projecting from the tip of the piston and contacting the rivet.

The drill piercing unit comprising: a housing mounted on a lower portion of the anvil die; A drill motor mounted in the housing so as to be slidable upward and downward along a longitudinal direction thereof and having a drill mounted on a tip of a rotary shaft; And raising and lowering means for selectively raising or lowering the drill motor inside the housing through the anvil die to allow the drill to process a mounting hole in two of the base materials.

The raising and lowering means includes a rack gear mounted on a lower portion of the drill motor; A drive motor mounted on the outer side of the housing such that a rotary shaft is disposed inside the housing; And a pinion gear mounted on a rotary shaft of the driving motor inside the housing and engaged with the rack gear.

When the rack gear is moved from the inside to the top or the bottom of the housing, movement of the rack gear can be guided by guide means for guiding both sides.

Wherein the guide means comprises: a rail formed on both sides of the interior of the housing; And at least one rail block slidably moved on the rail and connected to both sides of the rack gear, respectively.

The anvil die may have a through hole through which the drill passes at the center thereof.

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A piston having an outer diameter equal to an inner diameter of the cylinder and slidably movable in the cylinder; And a rod portion integrally formed from the upper surface and the lower surface center of the piston portion toward the upper portion and the lower portion, respectively.

An elastic member may be interposed between the piston and the clamper to provide an elastic force to the piston.

A rivet supply hose is connected to one side of the clamper facing the frame, and the rivet can be supplied through the rivet supply hose.

The piston may be slidably mounted inside the clamper through the inside of the clamper.

The rotary rod may have a protruding end formed at a tip end thereof which is in contact with the rivet.

The rivet may have a latching groove formed at a distal end of the rivet in contact with the rotation rod corresponding to the protruding end, and at least one protrusion may be formed in the lower portion.

The drill piercing unit and the riveting unit are provided on the lower side of the frame and connected to a chip removing unit for removing chips generated from the base material when the mounting hole is machined by the drill piercing unit .

Wherein the chip removing unit comprises: a storage tank in which a storage space for collecting chips introduced therein is formed; A connecting pipe connecting the drill piercing unit and the riveting unit to the storage space of the storage tank, respectively; And an air inhaler connected to a lower portion of the storage space inside the storage tank and sucking air in the storage space in operation to introduce chips into the storage space through the connection pipe.

As described above, according to the self-piercing rivet device according to the embodiment of the present invention, holes are drilled through drill piercing in the lower part of two or more objects to be joined, and rivetting is performed on the processed holes to join the objects to be joined , Stable joining is possible regardless of the strength and thickness of the object to be bonded, and there is an effect of improving bonding rigidity without occurrence of cracks.

Further, since a drill piercing unit is additionally provided in one apparatus to simultaneously perform a drill piercing and a riveting operation, it is unnecessary to provide a separate drill apparatus, thereby reducing facility cost and space utilization of a work site , And the productivity is improved by shortening the working time.

In addition, the present invention can be applied to ultra high tensile strength steel having a strength of 980 MPa or more, high-thickness steel material, or three or more laminated bonded objects, and the effect of improving design freedom without interfering with the correlated parts have.

1 is a cross-sectional view of a self-piercing rivet device according to an embodiment of the present invention.
2 is an enlarged view of a portion A in Fig.
3 is an enlarged view of a portion B in Fig.
4 is a cross-sectional view of a rivet applied to a self-piercing rivet device according to an embodiment of the present invention.
FIG. 5 is a step-by-step operation diagram of a self-piercing rivet device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not restrictive of the invention, It should be understood that various equivalents and modifications may be present.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

And throughout the specification, when an element is referred to as " comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

It should be noted that terms such as " ... unit ", " unit of means ", " part of item ", " absence of member ", and the like denote a unit of a comprehensive constitution having at least one function or operation it means.

Fig. 1 is a sectional view of a self-piercing rivet device according to an embodiment of the present invention. Fig. 2 is an enlarged view of a portion A of Fig. 1, Fig. 3 is an enlarged view of a portion B of Fig. Is a sectional view of a rivet applied to a self-piercing rivet device according to an embodiment of the present invention.

Referring to the drawings, a self-piercing rivet device 100 according to an embodiment of the present invention includes a hole piercing hole formed at a lower portion of a base material P, So that stable bonding can be performed irrespective of the strength and thickness of the object to be bonded so that the bonding rigidity can be improved without causing cracks.

To this end, the self-piercing rivet device 100 according to the embodiment of the present invention includes a frame 110, a drill piercing unit 120, and a riveting unit 150, as shown in FIG. do.

First, both ends of the frame 110 are arranged to face each other and form a C-shaped skeleton, and are mounted on the tip of the arm 112 of the robot (not shown).

The drill piercing unit 120 is installed at a lower portion of the anvil die 114 in which two sheets of the parent material P are seated on the lower one side of the frame 110 in a mutually overlapping state, So that the mounting hole H is selectively formed in the base material P.

2, the drill piercing unit 120 includes a housing 122, a drill motor 124, and an elevating and lowering means 125. [

First, the housing 122 is mounted on a lower side of the frame 110 at a lower portion of the anvil die 114.

The housing 122 may have a hollow space therein and may have a polygonal shape including a circular shape.

In the present embodiment, the drill motor 124 is mounted so as to be slidable upward and downward along the longitudinal direction in a state in which the rotary shaft is arranged to face upward in the housing 122, ).

Here, the anvil die 114 may have a through hole 116 through which the drill 123 passes.

The drill 123 is raised or lowered through the through hole 116 of the anvil die 114 toward the lower surface of the base material P smoothly without interference with the anvil die 114.

The elevating and lowering means 125 passes through the through hole 116 of the anvil die 114 to allow the drill 123 to machine the mounting hole H to the two base materials P, In the interior of the housing 122.

The raising and lowering means 125 includes a rack gear 126 mounted on the lower portion of the drill motor 124 and a driving motor 126 mounted on the outer side of the housing 122, And a pinion gear 128 mounted on the rotating shaft of the driving motor 127 in the housing 122 and engaged with the rack gear 126.

The driving motor 127 may be a servomotor or a step motor mounted on the housing 122 on the opposite side of the frame 110 and capable of changing the rotational speed and the rotational direction thereof.

The drive motor 127 of the lifting and lowering means 120 rotates the pinion gear 128 meshed with the rack gear 126 in the forward or reverse direction to rotate the rack gear 126 in the housing 122, As shown in Fig.

The drill motor 124 moves along with the rack gear 126 and moves the drill 123 toward the lower surface of the base material P so that the drill 123 can be rotated The mounting holes H are machined from the lower portion of the two parent materials P in the mutually superimposed state toward the upper portion.

Here, when the rack gear 126 is moved upward or downward from the inside of the housing 122, movement of the rack gear 126 can be stably guided by the guide means 130 for guiding both sides.

The guide means 130 includes a rail 132 formed on both sides of the housing 122 and a rail block 134 sliding on the rail 132 and connected to both sides of the rack gear 126 ).

That is, the rack gear 126 is engaged with the pinion gear 128 rotated according to the operation of the driving motor 127 and is slid on the rail 132 when the rack 122 is moved upward or downward from the inside of the housing 122 The movement can be stably guided by the rail block 134.

The riveting unit 150 is installed on one side of the frame 110 corresponding to the anvil die 114.

The riveting unit 150 is provided with a rivet 10 supplied from a rivet feeder 180 to the mounting hole H formed in the base material P by the drill piercing unit 120, So that the two base materials P are joined to each other.

3, the riveting unit 150 includes a cylinder 152, a rail housing 158, a rotary motor 162, and a rotary rod 164, as shown in FIG.

First, the cylinder 152 is mounted on one side of the upper part of the frame 110 corresponding to the anvil die 114, and the clamper 154 and the piston 156 are respectively inserted into upper and lower portions of the frame 110 And moves up and down the clamper 154 and the piston 156 toward the upper surface of the base material P depending on whether the operating pressure is supplied.

Here, the piston 156 may be slidably mounted in the clamper 154 in a state of passing through the inside of the clamper 154.

In the present embodiment, the rail housing 158 is mounted on the upper end of the cylinder 152, and at least one guide rail 157 is formed in the longitudinal direction.

Here, the guide rails 157 may be formed on both inner sides of the rail housing 158.

The rotary motor 162 is connected to a guide block 159 that moves along the guide rail 157 inside the rail housing 158 and is mounted so as to be slidable upward and downward.

The guide block 159 is slidably moved on the guide rail 157 when the rotary motor 162 is lifted or lowered together with the piston 156 according to whether the operating pressure of the cylinder 152 is supplied or not. As shown in Fig.

The rotary rod 164 is rotatably mounted through the center of the piston 156 and has one end connected to the rotary shaft of the rotary motor 162 and the other end projecting from the distal end of the piston 156 And is brought into contact with the rivet (10).

This rotary rod 164 is lifted or lowered by the piston 156 and is moved in the interior of the piston 156 in the state of being in contact with the upper surface of the rivet 10 by selective operation of the rotary motor 162 Can be rotated.

When the rotary rod 164 is rotated by the operation of the rotary motor 162, the rivet 10 is rotated while the rivet 10 is pressed by the piston 156.

The piston 156 includes a piston 156a having an outer diameter equal to the inner diameter of the cylinder 152 and slidably movable in the cylinder 152, And a rod portion 156b integrally formed with the lower portion and the lower portion, respectively, from the center toward the upper portion and the lower portion.

That is, the piston 156 is connected to the cylinder 152 at the upper portion of the piston portion 156a with the piston portion 156a interposed therebetween, and at a lower portion of the clamper 154, The clamper 154 can be moved up and down within the cylinder 152 by the operating pressure introduced into the cylinder 152.

Here, the clamper 154 presses the upper surface of the two mutually overlapped base materials P seated on the upper portion of the anvil die 114 when the clamper 154 is lowered by the operating pressure supplied to the upper portion of the piston portion 156a Clamped.

In the present embodiment, an elastic member 168 may be interposed between the piston 156a and the clamper 154 to provide an elastic force to the piston 156a.

Accordingly, when the operating force is applied to the upper portion of the cylinder 152, the elastic member 168 is compressed, and the piston 156 is advanced from the inside of the clamper 154 toward the rivet 10.

When the operating pressure is supplied to the lower portion of the cylinder 152, the elastic member 168 is released from the piston 152, 156a of the clamper 154, thereby rapidly raising the piston 156 inside the clamper 154. As shown in Fig.

In the present embodiment, the clamper 154 is connected to a rivet supply hose 182 on one side thereof facing the frame 110.

The rivet supply hose 182 has one end connected to the clamper 154 and the other end connected to the rivet feeder 180. The rivet 10 provided from the rivet feeder 180 is inserted into the inside of the clamper 154 .

At this time, the clamper 154 has a ball spring 169 for supporting the upper lower portion of the rivet 10 at a position where the rivet 10 is supplied to fix the rivet 10 to the inside of the clamper 154 .

The ball spring 169 functions to fix the rivet 10 so that the rivet 10 supplied to the inside of the clamper 154 does not descend toward the base material P. [

When the pressing force is transmitted to the ball spring 169 while the top surface of the rivet 10 is in contact with the tip of the rotating rod 164 descending with the piston 156 when the piston 156 is lowered, The rivet 10 is unlocked while being moved outward from the inside of the clamper 154.

Meanwhile, in the present embodiment, the rotary rod 164 may have a protruding end 166 formed at a tip end thereof which is in contact with the rivet 10.

4, the rivet 10 may have a latching groove 12 formed at a distal end of the rivet 10 in contact with the rotation rod 164 corresponding to the protruding end 166.

The rotation rod 164 is inserted into the engaging groove 12 formed on the upper surface of the rivet 10 so that the rivet 10 ) Are rotated together.

At least one protrusion 14 may be formed on the lower portion of the rivet 10. In this embodiment, the protrusion 14 is formed around the outer circumferential surface of the rivet 10 along a longitudinal direction at a plurality of intervals As shown in FIG.

The rivet 10 receives the pressing force of the piston 156 through the rotary rod 164 lowered by the piston 156 and moves downward toward the mounting hole H processed in the base material P And in this case, it can be rotated by the rotating rod 164 that rotates in accordance with the operation of the rotating motor 162.

The rivet 10 is riveted to the mounting hole H by the projections 14 in a screwing manner so that the rivet 10 is made of a material having an ultra-high strength steel of a certain strength or more or a thick thickness of a certain thickness or more At least two or more mutually superposed parent materials P are joined and joined together.

In this embodiment, the protruding end 166 is formed at the tip of the rotary rod 164 and the engaging groove 12 is formed in the rivet 10 corresponding to the protruding end 166, However, the present invention is not limited to this. However, the present invention is not limited thereto, and when the rivet is not to be applied to an ultra high tensile strength steel or a thick base material P having a thickness exceeding a certain thickness, a rotary rod 164 in which the projecting end 166 is not formed may be used.

When the mounting hole H is not formed in the base material P, by applying the anvil die having the molding cores other than the anvil die 114 according to the present embodiment having the through holes 116, May be deformed in the radial direction while being deformed along the molding tread to join the base material.

That is, the self-piercing rivet device 100 according to the embodiment of the present invention is a general self-piercing riveting operation, in which a mounting hole H is formed in a base material P through a drill piercing unit 120, It is possible to apply both the operation of pressing the rivet 10 to the mounting hole H by pressing the rivet 10 and the operation of pressing the rivet 10 while rotating the rivet 10 to the mounting hole H,

The drill piercing unit 120 and the riveting unit 150 are provided on the lower side of the frame 110 and are supported by the drill piercing unit 120 on the base material P And a chip removing unit 170 for removing chips generated from the base material P when the mounting hole H is machined.

Here, the chip removing unit 170 includes a storage tank 172, a connecting pipe 174, and an air suction unit 176.

When the chips generated from the base material P flow into the storage tank 172 at the time of processing the mounting hole H by the drill piercing unit 120, And is mounted on the lower side of the frame 110.

The connection pipe 174 is formed in the housing 122 of the drill piercing unit 120 and the inside of the clamper 154 of the riveting unit 150 in the storage space S of the storage tank 172, .

The housing 122 and the clamper 154 may be formed with an air inlet 178 for introducing outside air on the opposite side to the connecting pipe 174, respectively.

The air sucker 176 is connected to the lower portion of the storage space S in the storage tank 172 and sucks the air in the storage space S to operate the connection pipe 174 The chips are introduced into the storage space S.

That is, the chip removing unit 170 configured as described above may be configured such that the clamper 154 of the riveting unit 150 clamps the upper surface of the two parent materials P placed on the anvil die 114 When the drill 123 processes the mounting hole H to the base material P through the operation of the drill piercing unit 120 and the chips are generated from the base material P, the air inhaler 176 operates So that air in the storage space S is sucked.

The air in the housing 122 and the clamper 154 is sucked into the storage space S from the connection pipe 174 connected to the storage space S. At this time, (S) together with the outside air and stored.

Each air intake port 178 allows the air outside the housing 122 and the clamper 154 to flow into the storage space S through the connecting pipe 174 so that the inside of the housing 122 and the inside of the clamper 154 Foreign substances including the generated chips are removed more smoothly and the foreign substances including the generated chips are introduced into the storage space S of the storage tank 172.

Hereinafter, the operation and operation of the self-piercing rivet device 100 according to the embodiment of the present invention will be described in detail.

FIG. 5 is a step-by-step operation diagram of a self-piercing rivet device according to an embodiment of the present invention.

At this time, the riveting unit 150 is in a state in which the operating pressure is supplied to the lower portion of the cylinder 152 So that the clamper 154 and the piston 156 are lifted up inside the cylinder 152 (S1).

In this state, when the operating pressure is supplied to the upper portion of the cylinder 152, the clamper 154 is advanced from the inside of the cylinder 152 toward the base material P to press the upper surface of the base material P Thereby clamping the two parent materials P.

When the clamping of the base material P is completed with the clamper 154 of the riveting unit 150, the driving motor 127 of the lifting / lowering means 125 provided in the drill piercing unit 120 is operated, By rotating the gear 128 in the forward direction, the rack gear 126 is lifted inside the housing 122 by the forward rotation of the pinion gear 128.

The drill motor 124 is then lifted with the rack gear 126 rising inside the housing 122 and at the same time the drill motor 124 is operated to rotate the drill 123.

Therefore, the drill 123 processes the mounting hole H from the lower part of the two overlapping parent materials P (S2).

The chip removing unit 170 operates the air suction unit 176 to remove chips generated from the base material P when the mounting hole H is machined through the drill 123, And the chips existing in the housing 122 and the clamper 154 are introduced into the storage space S of the clamper 154 through the connecting pipe 174. [

In this state, when the machining of the mounting hole H is completed through the drill 123, the driving motor 127 of the raising and lowering means 125 is rotated in the opposite direction to rotate the rack gear 126 in the housing 122 So that the drill motor 124 is lowered.

The drill 123 is lowered by the lifting means 125 together with the drill motor 124. In this case, the drill motor 124 is rotated until the drill 123 is completely disengaged from the mounting hole H Is operated to rotate the drill 123 so that the drill 123 is smoothly detached from the mounting hole H. [

Thereafter, when the rivet 10 is supplied from the rivet feeder 180 to the inside of the clamper 154 through the rivet supply hose 182 (S3), the operating pressure continues to the inner upper portion of the cylinder 152 The piston 156 is lowered from the inside of the clamper 154 together with the rotary rod 164 so that the rivet 10 is pressed into the mounting hole H processed in the base material P to be riveted S4).

At this time, the rotation rod 164 is rotated through the operation of the rotation motor 162 while the projecting end 166 is inserted into the engagement groove 12 formed on the upper surface of the rivet 10, And the rivet 10 is pressed into the rivet 10 by the pressing force of the piston 156 while being rotated to the mounting hole H of the base material P by the rotary rod 164.

Then, the two sheets of the base material P are joined together by the rivet 10 which is press-fitted into the mounting hole H and rivetted in a mutually overlapping state.

When the riveting operation is completed through the rivet 10, operating pressure is supplied to the lower side of the cylinder 152 to raise the clamper 154 and the piston 156. [

At this time, the resilient member 168 interposed between the clamper 154 and the piston 156 provides the resilient force to the piston 156 in a compressed state, so that the piston 156 ) To a position higher than the rivet supply hose 182.

When the clamper 154 and the piston 156 are completely lifted up, the clamping is released in a state where the rivets 10 are mounted on the mounting hole H and are joined to each other, The base material P having been subjected to riveting is taken out (S5).

That is, the two parent materials P are riveted to each other through the rivet 10 while repeating the above-described operation.

This self-piercing rivet device 100 is capable of riveting even if the base material P is an ultra-high strength steel having a strength of 980 MPa or more or a thick material, and a general self-piercing rivet And can be applied to common use.

Therefore, when the self-piercing rivet device 100 according to the embodiment of the present invention as described above is applied, holes are drilled through the drill piercing at the lower portion of the base material P, By joining the objects to be bonded by performing riveting on the holes, stable joining is possible regardless of the strength and thickness of the object to be bonded, and the bonding rigidity can be improved without causing cracks.

Further, a drill piercing unit 120 is additionally provided inside one apparatus to process the mounting hole H through drill piercing and simultaneously perform the riveting operation through the riveting unit 150, Since it is not necessary to provide a device, the facility cost can be reduced, the space utilization of the workplace can be improved, and the productivity can be improved by shortening the working time.

In addition, the present invention can be applied to ultra high tensile strength steel having a strength of 980 MPa or more, high-thickness steel material, or three or more laminated bonded objects, and can improve the degree of freedom of design without interfering with the correlated parts .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

10: Rivet 12: Retaining groove
14: projection 100: self-piercing rivet device
110: Frame 112: Cancer
114: anvil die 116: through hole
120: drill piercing unit 122: housing
123: Drill 124: Drill motor
125: raising and lowering means 126: rack gear
127: drive motor 128: pinion gear
130: guide means 132: rail
134: Rail block 150: riveting unit
152: cylinder 154: clamper
156: piston 156a:
156b: Rod section 157: Guide rail
158: rail housing 159: guide block
162: Rotary motor 164: Rotary rod
166: protruding end 168: elastic member
169: ball spring 170: chip removal unit
172: storage tank 174: connecting pipe
176: Air inhaler 180: Rivet feeder
182: Rivet supply hose P: Base material
H: Mounting hole S: Storage space

Claims (15)

A frame mounted on the arm end of the robot, the both ends of the frame being arranged to face each other to form a C-shaped skeleton;
A drill piercing unit installed at a lower portion of the anvil die in which two sheets of base material are seated on the lower side of the frame, the drill piercing unit selectively advancing toward the base material and machining the mounting hole in the base material; And
A rivet provided on an upper side of the frame corresponding to the anvil die and rivets supplied from a rivet feeder are riveted by a clamper and a piston to the mounting hole formed in the base material by the drill piercing unit, And a riveting unit for joining,
The riveting unit
The clamper and the piston are slidably mounted on the upper portion of the frame corresponding to the anvil die. The clamper and the piston are slidably movable upward and downward, respectively, A cylinder for moving the piston up and down;
A rail housing mounted on an upper end of the cylinder and having at least one guide rail formed in the longitudinal direction;
A rotary motor connected to a guide block moving along the guide rail in the rail housing and slidably mounted upward and downward; And
A rotary rod mounted rotatably through a center of the piston and having one end connected to a rotary shaft of the rotary motor and the other end projecting from a tip of the piston and contacting the rivet;
Wherein the self-piercing rivet device comprises: The method according to claim 1,
The drill piercing unit
A housing mounted on a lower portion of the anvil die;
A drill motor mounted in the housing so as to be slidable upward and downward along a longitudinal direction thereof and having a drill mounted on a tip of a rotary shaft; And
Up and down means for selectively raising or lowering the drill motor inside the housing through the anvil die to allow the drill to process mounting holes in the two base materials;
Wherein the self-piercing rivet device comprises: 3. The method of claim 2,
The rising /
A rack gear mounted on a lower portion of the drill motor;
A drive motor mounted on the outer side of the housing such that a rotary shaft is disposed inside the housing; And
A pinion gear mounted on a rotating shaft of the driving motor inside the housing and engaged with the rack gear;
Wherein the self-piercing rivet device comprises: The method of claim 3,
The rack gear
Wherein the guide is guided by a guiding means for guiding both sides of the housing when moving from the inside to the top or the bottom of the housing. 5. The method of claim 4,
The guide means
A rail formed on both inner sides of the housing; And
At least one rail block slidably moved on the rails and connected to both sides of the rack gear;
Wherein the self-piercing rivet device comprises: 3. The method of claim 2,
The anvil die
And a through hole through which the drill passes is formed in the center. delete The method according to claim 1,
The piston
A piston having an outer diameter equal to an inner diameter of the cylinder and slidably movable in the cylinder; And
A rod portion integrally formed from an upper surface and a lower surface center of the piston portion toward an upper portion and a lower portion, respectively;
Wherein the self-piercing rivet device comprises: 9. The method of claim 8,
Between the piston and the clamper
And an elastic member for providing an elastic force to the piston portion is interposed. The method according to claim 1,
The clamper
Wherein a rivet supply hose is connected to one side of the frame and the rivet is supplied through the rivet supply hose. The method according to claim 1,
The piston
Wherein the clamper is slidably mounted inside the clamper in a state of passing through the inside of the clamper. The method according to claim 1,
The rotating rod
And a protruding end is formed at a tip end of the rivet in contact with the rivet. 13. The method of claim 12,
The rivet
Wherein at least one protrusion is formed in a lower portion of the rivet, wherein the engaging groove is formed at a tip end of the protrusion in contact with the rotating rod. The method according to claim 1,
The drill piercing unit and the riveting unit
And a chip removing unit provided on the other side of the lower portion of the frame for removing chips generated from the base material when the mounting hole is formed in the base material by the drill piercing unit. 15. The method of claim 14,
The chip removal unit
A storage tank in which a storage space for collecting chips introduced therein is formed, and a storage tank mounted on the lower side of the frame;
A connecting pipe connecting the drill piercing unit and the riveting unit to the storage space of the storage tank, respectively; And
An air suction unit connected to a lower portion of the storage space inside the storage tank and sucking air in the storage space in operation to introduce chips into the storage space through the connection pipe;
Wherein the self-piercing rivet device comprises:

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