KR20160125149A - Rivet screw drill - Google Patents

Rivet screw drill Download PDF

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Publication number
KR20160125149A
KR20160125149A KR1020150055966A KR20150055966A KR20160125149A KR 20160125149 A KR20160125149 A KR 20160125149A KR 1020150055966 A KR1020150055966 A KR 1020150055966A KR 20150055966 A KR20150055966 A KR 20150055966A KR 20160125149 A KR20160125149 A KR 20160125149A
Authority
KR
South Korea
Prior art keywords
base material
thread
present
screw drill
rivet screw
Prior art date
Application number
KR1020150055966A
Other languages
Korean (ko)
Inventor
박병준
이문용
Original Assignee
주식회사 성우하이텍
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 성우하이텍 filed Critical 주식회사 성우하이텍
Priority to KR1020150055966A priority Critical patent/KR20160125149A/en
Priority to CN201610244003.9A priority patent/CN106065893A/en
Priority to US15/131,204 priority patent/US10125805B2/en
Priority to DE102016107209.5A priority patent/DE102016107209A1/en
Publication of KR20160125149A publication Critical patent/KR20160125149A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/06—Solid rivets made in one piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
    • F16B23/003—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool star-shaped or multi-lobular, e.g. Torx-type, twelve-point star
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0021—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being metal, e.g. sheet-metal or aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/04—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of riveting

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Connection Of Plates (AREA)

Abstract

A rivet screw drill is disclosed. A rivet screw drill for joining at least two or more preforms, comprising: i) a head part mounted on a reciprocating and rotatable welding tool; ii) a head part integrally connected to the head part, And iii) a base material perforation which is integrally connected to the base material securing portion and which presses the base materials by the welding tool and perforates the base materials while being rotated by the welding tool.

Description

[0001] RIVET SCREW DRILL [0002]

An embodiment of the present invention relates to a fastening element, and more particularly to a rivet screw drill for joining two or more preforms by a mechanical joining method.

Generally, in the method of forming various structures by joining a plurality of base materials such as metal or nonmetallic plate materials, sheets, and unspecified shapes, it is possible to use various types of base materials, such as bolts, nuts and rivets, And a mechanical joining method is used.

Among them, a mechanical joining method using a rivet can form a hole through a drilling operation on the base materials to be joined, and the rivet can be plastic-deformed and the base materials can be fastened while the rivet is inserted in the hole.

In another type of mechanical joining method, a method of holing a plurality of base materials and then blind rivet joining is common.

On the other hand, in the case of joining a different material (for example, aluminum and steel) of waste clusters, the melting temperatures of the base materials are different, so that there is a limit in joining the different materials and there are many difficulties in terms of design freedom.

In order to solve this problem, a plurality of base materials are joined to each other by using a fastening element called FDS (Flow Drill Screw) in the related art. Such a fastening element is also referred to in the art as a rivet of a friction stir method.

As one example, the fastening elements of the FDS include a head portion mounted on the pressurizing / rotating device, a thread portion integrally formed on the head portion and having a thread formed on the outer peripheral surface thereof, and a perforated portion integrally connected to the thread portion, .

In the bonding method using the fastening elements of the FDS, the head portion may be mounted on the pressing / rotating device, and the head portion may be pressed and rotated through the pressing / rotating device while the perforations are in contact with the overlapped base materials. Accordingly, the FDS fastening element forms a hole in the base materials by the friction of the perforation, and the base materials can be integrally joined by screwing the base materials through the threaded portion.

However, in the blind joining method as described above, the free hole is to be formed on the base material to be joined, and the joining method using the fastening elements of the FDS is such that when the base material of the high tensile steel is joined, the piercing ability It is necessary to bond the base material to the FDS fastening element after machining free holes in the base material.

Therefore, in the case of the above-mentioned mechanical joining methods, since the process of separately drilling free holes in the base material is added, the hole processing ratio can be added due to the addition of the process, and productivity and workability are deteriorated .

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.

Embodiments of the present invention provide a rivet screw drill that does not need to process a free hole in a base material, can improve the piercing ability of the base material, and can further improve the bonding performance of the base material.

A rivet screw drill according to an embodiment of the present invention is for joining at least two or more preforms, comprising: i) a head portion mounted on a reciprocating and rotatable welding tool; ii) a head portion integrally connected to the head portion, And a base material coupling portion integrally connected to the base material coupling portion and configured to press the base materials by the bonding tool and to perforate the base materials while being rotated by the bonding tool .

In addition, in the rivet screw drill according to the embodiment of the present invention, the base material perforation may be sharply formed from the base material coupling portion toward the end.

Also, in the rivet screw drill according to the embodiment of the present invention, an arc-shaped line-contacting end contacting the base material may be formed at an end of the base material perforation.

Further, in the rivet screw drill according to the embodiment of the present invention, a groove having a circular open end may be formed at an end of the base material perforation.

Further, in the rivet screw drill according to the embodiment of the present invention, the line contact end may be formed as a circular open end of the groove.

Further, in the rivet screw drill according to the embodiment of the present invention, the groove may have a triangular-column sectional shape in which the diameter gradually decreases from the circular open end toward the base material coupling portion.

Further, in the rivet screw drill according to the embodiment of the present invention, the base material coupling part and the base material perforation part may have a sectional shape of a close to circular triangle.

In the rivet screw drill according to the embodiment of the present invention, a mounting protrusion coupled to the welding tool may protrude from the head portion.

In the rivet screw drill according to an embodiment of the present invention, the mounting protrusion may have a plurality of support stages in a round shape along the circumference of the circular shape with respect to a circular shape.

Further, in the rivet screw drill according to the embodiment of the present invention, the mounting protrusions may be arranged in a radial manner so that even-numbered support ends correspond to each other.

Further, in the rivet screw drill according to the embodiment of the present invention, the mounting protrusion may be in the form of a sunflower having six supporting ends.

Further, in the rivet screw drill according to the embodiment of the present invention, the mounting projections may be arranged such that the three support ends are radially arranged.

Further, in the rivet screw drill according to the embodiment of the present invention, the mounting protrusion may be formed in a three-arcuate arc shape by the supporting ends.

Further, in the rivet screw drill according to the embodiment of the present invention, the mounting protrusions may be provided with the convex portions of the supporting ends, and a concave space may be formed between the supporting ends.

Further, in the rivet screw drill according to the embodiment of the present invention, a main thread may be formed in a part of the base material coupling part between the base material perforations in the head part.

Also, in the rivet screw drill according to the embodiment of the present invention, the auxiliary thread may be formed in the remaining section between the main thread and the base material perforation with a thread having a smaller thread than the main thread.

In the rivet screw drill according to the embodiment of the present invention, the cross sectional area of the auxiliary thread may be larger than the cross sectional area of the main thread.

Further, in the rivet screw drill according to the embodiment of the present invention, the main thread may have a thread having a triangular cross-sectional shape.

Further, in the rivet screw drill according to the embodiment of the present invention, the auxiliary thread may be provided with a thread having a round cross-sectional shape.

Since the embodiment of the present invention does not need to process the free holes in the base material, the productivity and workability can be improved, and the processing cost for processing the free holes can be reduced.

Further, in the embodiment of the present invention, the piercing ability of the base material can be improved by changing the structure of the head part, the base material coupling part and the base material perforation, and the bonding performance of the base material can be further improved.

These drawings are for the purpose of describing an exemplary embodiment of the present invention, and therefore the technical idea of the present invention should not be construed as being limited to the accompanying drawings.
1 is a cross-sectional view showing a base material bonding structure of a rivet screw drill according to an embodiment of the present invention.
2 is a perspective view illustrating a rivet screw drill according to an embodiment of the present invention.
3 is a front view showing a rivet screw drill according to an embodiment of the present invention.
4 is a plan view showing a rivet screw drill according to an embodiment of the present invention.
FIG. 5 is a view showing a modified example of the head portion applied to the rivet screw drill according to the embodiment of the present invention.
6 is a cross-sectional view illustrating a rivet screw drill according to an embodiment of the present invention.
7 is a front view showing a rivet screw drill according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

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.

In the following detailed description, the names of components are categorized into the first, second, and so on in order to distinguish them from each other in the same relationship, and are not necessarily limited to the order in the following description.

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.

Also, the terms " part, "" means," and the like, which are described in the specification, refer to a unit of a comprehensive configuration that performs at least one function or operation.

1 is a cross-sectional view showing a base material bonding structure of a rivet screw drill according to an embodiment of the present invention.

Referring to FIG. 1, a rivet screw drill 100 according to an embodiment of the present invention can be applied to a body assembling process of joining two or more superposed base materials 1, for example, body panels together.

However, the base materials 1 are not necessarily limited to those including a panel for a vehicle body, and may include various body structures such as a body member, a frame, and the like.

Furthermore, it should be understood that the protection scope of the present invention is not limited to the assembly and assembly of the panel for a vehicle body, and the technical idea of the present invention can be applied to various types and uses of structures, have.

Here, the base materials 1 may include a metal sheet material such as an aluminum sheet or a steel sheet, and may include a non-metallic material such as a composite material, plastic, and rubber. In addition, the base materials 1 may include plate materials of the same kind, and may include plate materials of different materials.

However, in the embodiment of the present invention, as an example of bonding the base materials 1 including the dissimilar material of the closed end face (for example, aluminum and the high strength steel plate) by the mechanical bonding method as the base material 1 .

The rivet screw drill 100 according to the embodiment of the present invention is for solid-state bonding two or more superposed mother materials 1 by a mechanical joining method such as friction and plastic deformation.

Hereinafter, the following components will be described with reference to the case where the rivet screw drill 100 is vertically oriented. The upper part and the upper part of the rivet screw drill 100 are defined as an upper part and an upper part, respectively, Is defined as a lower end portion and a lower portion.

Since the reference direction of the rivet screw drill 100 and the joining direction of the base materials 1 may be different from each other in the relative direction, But is not limited thereto.

In the meantime, the embodiment of the present invention includes a welding tool 3 for solid-phase bonding the base materials 1 in a mechanical bonding manner by using the rivet screw drill 100.

Here, the rivet screw drill 100 according to the embodiment of the present invention is rotated by a bonding tool 3 to form a hole in the base materials 1 and is screwed to the base materials 1, (1) can be integrally joined.

The welding tool 3 can restrict the rivet screw drill 100 and move the rivet screw drill 100 in the up and down direction and rotate it. The welding tool 3 may be rotatably moved reciprocally in a linear direction by a predetermined driving means.

For example, the welding tool 3 includes a mount portion 5 for clamping (clamping) the head portion 10 of the rivet screw drill 100, and a mounting portion 5 for reciprocating the mount portion 5 in the up- (Not shown).

Since the construction of the welding tool 3 is constituted by a well-known friction stir welding system known in the art, a detailed description of its construction will be omitted herein.

The rivet screw drill 100 according to the embodiment of the present invention described below can improve the piercing ability of the base material 1 without the need of separately machining the free hole in the base material 1, ) Can be further improved.

FIG. 2 is a perspective view illustrating a rivet screw drill according to an embodiment of the present invention, and FIG. 3 is a front structural view illustrating a rivet screw drill according to an embodiment of the present invention.

1 to 3, the rivet screw drill 100 according to the embodiment of the present invention basically includes a head portion 10, a base material coupling portion 40, and a base material perforation 70, The following is a description according to the constitution.

In the embodiment of the present invention, the head portion 10 is a portion directly receiving the pressing force and the rotational force of the welding tool 3 mentioned above, And is formed of a circular plate having a predetermined thickness.

The head portion 10 supports the uppermost surface bonding point of the base materials 1 when the base materials 1 are overlapped with each other through the rivet screw drill 100 according to the embodiment of the present invention. .

The head unit 10 is fixedly mounted on the welding tool 3 and the mounting unit 3 is mounted on the head unit 10 with a mounting protrusion 11 formed thereon.

Here, the mounting protrusion 11 is fitted to the mounting portion 5 of the welding tool 3 and can be fixedly mounted. That is, the mounting protrusion 11 is inserted into the mounting groove of the mounting portion 5 and can be clamped.

The mounting projections 11 are formed so as to protrude from the center of the upper surface of the head portion 10. The mounting protrusions 11 form a plurality of support steps 13 along the circumference of the circular shape with reference to a circular shape.

In the embodiment of the present invention, the mounting protrusions 11 may have a shape in which even-numbered support ends 13 correspond to each other and are disposed in a radial pattern, as shown in FIG. For example, the mounting projection 11 may have a planar shape in the form of a sunflower having six supporting ends 13.

Here, the mounting protrusions 11 are provided with the convex portions of the supporting ends 13, and a concave space may be formed between the supporting ends 13.

That is, the mounting protrusions 11 are provided in a planar shape in which the support steps 13 protrude from the upper surface of the head part 10 in a round shape in a circumferential direction of the circular shape with respect to the circular shape, A concave space can be formed between the convexly protruding portions of the support stages 13. [

As a modified example of the mounting projection 11 according to the embodiment of the present invention, three supporting ends 13 are radially arranged along the circumference of the circular shape with reference to a circular shape as shown in Fig. 5 Shape. For example, the mounting protrusions 11 may be formed in three-arcuate arcs by the supporting ends 13. [

Here, the three-arcuate arc shape can be defined as a shape in which three arcs are radially arranged along the circumference of the circular shape of the central portion formed by crossing the three ellipses, and the shapes are mutually connected.

Alternatively, the mounting protrusion 11 according to the above modification is not necessarily limited to a three-arcuate arc, but may be formed by crossing two oval-shaped circular protrusions 11, The arc may be arranged in a radial pattern and may be in the form of a four-sided arc which is mutually connected.

Likewise, the mounting projection 11 according to the present modification has a three-arcuate arc shape, in which the supporting ends 13 are provided as convex portions and a concave space is formed between the convexly protruding portions of the supporting ends 13 can do.

The reason why the mounting projection 11 of the head portion 10 mounted on the welding tool 3 is formed in the shape of a sunflower or a three-arcuate arc as described above is that the head portion 10 of the welding tool 3 To further increase the contact area.

1 to 3, in the embodiment of the present invention, the base material coupling part 40 is screwed on the inner periphery of the hole of the base material 1 which is opened through the base material perforation 70 to be described later , And the base materials (1) can be integrally joined.

The base material coupling part 40 is a body part integrally connected to the center of the lower surface of the head part 10, and a thread 41 advancing in the vertical direction is formed on the outer surface.

In the embodiment of the present invention, the base material perforation 70 presses the base materials 1 with the bonding tool 3 and forms holes in the base materials 1 while rotating by the bonding tool 3 can do.

The base material perforation 70 is integrally connected to the base material securing part 40 and is fixed to the base material securing part 40 so as to perforate the base materials 1 by the pressing force and the rotational force of the welding tool 3 And may be sharply formed toward the end (the bottom end in the drawing).

That is, the base material perforation 70 may have a shape in which the cross-sectional area gradually decreases from the base material coupling portion 40 toward the end, and is sharpened. Thus, the base material perforation 70 can form a circular hole in the base materials 1 by the pressing force and the rotational force of the welding tool 3.

6, in the rivet screw drill 100 according to the embodiment of the present invention having the above-described structure, the base material joining part 40 and the base material perforation 70 are formed from a close to circular triangle cross-sectional shape.

Here, the triangular cross-section closest to the circular shape is not a triangular cross-section having sharp edges but a noncircular (circular) shape in which the corner portions are connected in a round shape (indicated by a dotted line in the figure) As shown in Fig.

The thread 41 of the base material coupling part 40 has a sectional shape of a close to circular triangle in which the base material coupling part 40 is nearly circular, And may be formed as a spiral protrusion moving in the vertical direction along the sectional shape of the triangle.

On the other hand, in the embodiment of the present invention, the base material perforation 70 as described above forms a line-contacting end 71 at an end thereof. The line contact end 71 is formed in an arc shape at the end of the base material perforation 70 and comes into line contact with the surface of the base material 1.

That is, in the base material perforation 70, the base materials 1 are punched by receiving the pressing force and the rotational force of the welding tool 3 in a state where the wire contact end 71 is in line contact with the surface of the base material 1 .

The line contact portion 71 is in contact with the surface of the base material 1 when the base materials 1 are drilled through the base material perforation 70 and is in contact with the surface of the base material 1, And the piercing ability of the base materials 1 can be improved.

For example, the line contact end 71 may be formed by a groove 73 provided at an end of the base material perforation 70. The groove 73 has a substantially circular open end and is formed as a groove recessed toward the base material coupling part 40 at the end of the base material perforation 70.

The groove 73 may have a triangular-column cross-sectional shape, such as a conical shape, whose diameter gradually decreases from the circular open end to the base material coupling portion 40 side. In this case, the arc-shaped line contact end 71 may be formed as a circular open end of the groove 73.

Hereinafter, a method of joining workpieces using the rivet screw drill 100 according to the embodiment of the present invention will be described in detail with reference to the drawings.

First, in the embodiment of the present invention, the head portion 10 of the rivet screw drill 100 is mounted on the mount portion 5 of the welding tool 3. The head portion 10 is mounted to the mount portion 5 through the mounting protrusion 11. The mounting protrusion 11 is inserted into the mounting groove of the mount portion 5 And can be clamped.

In this case, the mounting protrusion 11 can be fitted and mounted on the mounting portion 5 of the welding tool 3 in the form of a sunflower or a three-sided arc having a plurality of round-shaped support ends 13.

In this state, in the embodiment of the present invention, the rivet screw drill 100 is moved to the two or more superposed mother materials 1 through the driving unit 7 of the welding tool 3, and the rivet screw drill 100 The base material perforations 70 are pressed against the base materials 1 and the rivet screw drill 100 is rotated through the driving unit 7 of the welding tool 3.

Then, the base material perforation 70 punctures the base materials 1 as friction force and rotational force applied from the driving unit 7 of the bonding tool 3 by friction. As described above, the hole drilled by the base material perforation 70 may be formed such that its inner diameter is relatively smaller than the outer diameter of the thread 41 of the base material securing part 40.

Here, in the embodiment of the present invention, the head portion 10 of the rivet screw drill 100 is mounted on the mount portion 5 of the welding tool 3 through the mounting projections 11 in the form of a sunflower or a three-arcuate arc, The contact area of the head portion 10 with respect to the mount portion 5 can be increased. In the embodiment of the present invention, the base material perforation 70 is formed by pressing the base materials 1 by means of the welding tool 3 in the shape of a triangle having a nearly circular shape.

Therefore, in the embodiment of the present invention, the cross sectional shape of a triangle close to a circle is formed in a state in which the contact area of the head portion 10 with respect to the mount portion 5 of the welding tool 3 is increased through the mounting projection 11 The base materials 1 can be pierced through the base material perforations 70 of the base material 1 while the base material perforations 70 are rotated.

In addition, in the embodiment of the present invention, the pressing force and the rotational force of the welding tool 3 are received while the line contact end 71 of the base material perforation 70 is in contact with the surface of the base material 1, (1).

Thus, in the embodiment of the present invention, frictional force and frictional heat due to perforating the base materials 1 through the base material perforation 70 can be increased, thereby further improving the piercing ability of the base materials 1 have.

On the other hand, in the embodiment of the present invention, the rivet screw drill 100 is pressed and rotated while the base materials 1 are pierced through the base material perforation 70 as described above.

The base material coupling part 40 of the rivet screw drill 100 is inserted into the holes of the base materials 1 drilled by the base material perforations 70 and screwed to the inner circumference of the hole through the threads 41 . At this time, the head portion 10 supports the uppermost surface of the base materials 1. [

Here, in the embodiment of the present invention, since the cross-sectional shape of the base material coupling part 40 is a triangle close to the circular shape, the thread 41 of the corner part is screwed with a strong pressure on the inner periphery of the hole, 1) can be integrally joined.

That is, in the embodiment of the present invention, since the cross-sectional shape of the base material coupling portion 40 is a triangle close to the circular shape, the thread 41 of the base material coupling portion 40 is pierced in the hole of the base material 1 It is possible to further increase the fastening area of the thread 41 in the corner portion than the fastening area of the thread 41 excluding the corner portion.

Therefore, in the embodiment of the present invention, since the base material coupling portion 40 can be screwed into the inner periphery of the hole of the base materials 1 with a strong clamping force, the bonding properties of the base materials 1 can be improved, ) Can be increased.

In the embodiment of the present invention, the cross-sectional shapes of the base material coupling portion 40 and the base material perforation 70 are formed in a triangular shape which is close to a circular shape, so that the base materials 1 are joined through the rivet screw drill 100, It is possible to reduce the joint load (torque) of the welding tool 3, which results in stability of the operation of the welding tool 3.

According to the rivet screw drill 100 according to the embodiment of the present invention as described above, it is not necessary to process the preform in the base material 1 unlike the prior art, so that productivity and workability can be improved, It is possible to reduce the processing cost associated with machining the free holes.

According to the embodiment of the present invention, the piercing ability of the base material 1 can be improved by changing the structure of the head part 10, the base material coupling part 40 and the base material perforation 70, The bonding performance can be further improved.

7 is a front view showing a rivet screw drill according to another embodiment of the present invention.

Referring to FIG. 7, the rivet screw drill 200 according to another embodiment of the present invention is based on the structure of the electric embodiment, and the screw 141 is provided with the main thread 142a and the auxiliary thread 142b, The fastening portion 140 can be formed.

In the embodiment of the present invention, the main thread 142a is screwed to the inner periphery of the hole 1 of the base material 1 (see FIG. 1) drilled by the base material perforation 170, And the base material perforation 170, as shown in FIG.

The auxiliary thread 142b supports the hole before the main thread 142a is screwed to the inner circumference of the hole of the base material 1 drilled by the base material perforation 170. The main thread 142a, And the base material perforation 170 in the remaining section.

Here, the auxiliary thread 142b has relatively few threads than the thread of the main thread 142a, and the cross sectional area of the thread may be formed larger than the thread cross sectional area of the main thread 142a.

For example, the main threads 142a form threads having a substantially triangular cross-sectional shape, and the auxiliary threads 142b form threads having a round cross-sectional shape that is gentler than the main threads 142a.

Therefore, according to the rivet screw drill 200 according to another embodiment of the present invention configured as described above, the pressing force and rotational force applied from the welding tool 3 (see FIG. 1) The rivet screw drill 200 is pressed and rotated in a state where a hole is drilled in the drill 1.

Then, the auxiliary thread 142b of the thread 141 of the base material coupling part 140 advances along the inner periphery of the hole of the base material 1 and supports the hole side. Thereafter, the main thread 142a of the thread 141 penetrates into the holes of the base materials 1 and is screwed into the inner periphery of the holes.

As a result, in the other embodiment of the present invention, since the auxiliary thread 142b supports the hole before screwing the main thread 142a of the base material coupling part 140 into the hole of the base material 1, The base materials 1 can be bonded while maintaining the perpendicularity of the drill 200. [

In another embodiment of the present invention, when the base materials 1 are bonded, the rivet screw drill 200 can be prevented from being detached from the hole side by the auxiliary thread 142b of the base material coupling part 140. [

As described above, according to another embodiment of the present invention, the perpendicularity of the rivet screw drill 200 can be maintained and the rivet screw drill 200 can be prevented from being detached from the hole side, so that workability and bonding performance can be further improved have.

The rest of the structure and operation of the rivet screw drill 200 according to another embodiment of the present invention are the same as those of the previous embodiment, and thus a detailed description thereof will be omitted.

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, but, on the contrary, And it goes without saying that the invention belongs to the scope of the invention.

1 ... base material 3 ... welding tool
5 ... Mount part 7 ... Drive part
10, 110 ... Head part 11 ... Mounting projection
13: supporting end 40, 140: base material fastening part
41, 141 ... thread 70, 170 ... base material
71 ... line contact end 73 ... groove
100, 200 ... rivet screw drill 142a ... main thread
142b ... auxiliary thread

Claims (12)

A rivet screw drill for joining at least two or more preforms,
A head portion mounted on the reciprocating and rotatable welding tool;
A base material coupling part integrally connected to the head part and having a thread formed on an outer surface thereof; And
A base material perforation unit integrally connected to the base material securing unit and configured to press the base materials by the bonding tool and perforate the base materials while being rotated by the bonding tool;
Lt; / RTI >
Wherein the base material perforation is sharply formed from the base material coupling part to the end, and an end of the base material perforation is formed with an arc-shaped line-contacting end in line with the base material. The method according to claim 1,
At the end of the base material perforation, a groove having a circular open end is formed,
And the line contact end is formed as a circular open end of the groove. 3. The method of claim 2,
The groove
And a triangular column cross-sectional shape in which the diameter gradually decreases from the circular open end toward the base material fastening portion side. The method according to claim 1,
Wherein the base material fastening portion and the base material perforation portion have a cross-sectional shape close to a circular triangle. The method according to claim 1,
A mounting protrusion coupled to the welding tool is formed on the head portion,
Wherein the mounting protrusion has a plurality of support stages in a round shape along a circumference of the circular shape with respect to a circular shape. 6. The method of claim 5,
The mounting projection
And the even number of the support ends correspond to each other and are disposed in a radial manner. The method according to claim 6,
Wherein the mounting protrusion is in the form of a sunflower having six supporting ends. 6. The method of claim 5,
The mounting projection
And the three support ends are disposed in a radial pattern. 9. The method of claim 8,
Wherein the mounting protrusion is formed in a three-arcuate arc shape by the supporting ends. 10. The method according to any one of claims 5 to 9,
The mounting projection
Wherein the support ends are provided as convex portions, and a concave space is formed between the support ends. 5. The method of claim 4,
The base material-
A main thread is formed in a part of the head part between the base material perforations,
The auxiliary thread is formed in the remaining section between the main thread and the base material perforation, the thread being less threaded than the main thread,
Wherein a cross sectional area of the auxiliary thread is larger than a cross sectional area of the main thread. 12. The method of claim 11,
The main thread has a thread having a triangular cross-sectional shape,
Wherein the auxiliary threads comprise threads of round cross-sectional shape.
KR1020150055966A 2015-04-21 2015-04-21 Rivet screw drill KR20160125149A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020150055966A KR20160125149A (en) 2015-04-21 2015-04-21 Rivet screw drill
CN201610244003.9A CN106065893A (en) 2015-04-21 2016-04-18 Riveted type spiral drill
US15/131,204 US10125805B2 (en) 2015-04-21 2016-04-18 Rivet screw drill
DE102016107209.5A DE102016107209A1 (en) 2015-04-21 2016-04-19 Nietschraubenbohrer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150055966A KR20160125149A (en) 2015-04-21 2015-04-21 Rivet screw drill

Publications (1)

Publication Number Publication Date
KR20160125149A true KR20160125149A (en) 2016-10-31

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KR1020150055966A KR20160125149A (en) 2015-04-21 2015-04-21 Rivet screw drill

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200082148A (en) * 2018-12-28 2020-07-08 주식회사 성우하이텍 rivet screw drill
GB2594206A (en) * 2018-05-14 2021-10-20 Snap On Tools Corp Combined screw and rivet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2594206A (en) * 2018-05-14 2021-10-20 Snap On Tools Corp Combined screw and rivet
GB2594206B (en) * 2018-05-14 2022-04-13 Snap On Tools Corp Combined screw and rivet fastener
KR20200082148A (en) * 2018-12-28 2020-07-08 주식회사 성우하이텍 rivet screw drill

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