KR102205663B1 - Forming device for manufacturing nut formde integrally with complex material panel - Google Patents

Abstract

Disclosed is a device of forming a nut integrated with a complex material board. According to one exemplary embodiment of the disclosed present invention, the device of forming a nut integrated with a complex material board is configured to form a nut integrally on a complex material board which is made of the same material as the nut. The device of forming a nut integrated with a complex material board may comprise: i) a lower die which supports a complex material board with a free hole and a nut through a holder; ii) a heating member installed on the lower die; and iii) an upper die installed to be able to move in the vertical direction with respect to the lower die, and having a nut pressing end formed on a lower surface thereof so as to press the nut with an edge part of the free hole of the complex material board. The present invention can respond to the trend of making a car body lighter and smaller.

Description

Composite plate integrated nut forming device {FORMING DEVICE FOR MANUFACTURING NUT FORMDE INTEGRALLY WITH COMPLEX MATERIAL PANEL}

An embodiment of the present invention relates to a composite plate-integrated nut forming apparatus, and more particularly, to a composite plate-integrated nut forming apparatus for integrally forming a nut of the same material on a composite plate in multiple stages.

In general, various coupling means are used at interconnecting parts to connect or combine different configurations from automobile parts, parts of various industrial machinery, and home appliances. In the part, a mechanical coupling method is mainly used in which bolts and nuts are used.

As an example of such a mechanical coupling method, a weld nut is formed in one part, and the other part coupled thereto may be a mounting structure of a weld nut method to be fastened to the weld nut through bolts.

However, the weld nut is fixed by welding (e.g., projection welding) to the plate, and in this welding method, it is difficult to control the welding conditions such as the shape of the conducting surface, the electric current, the voltage value, and the pressing force, and the heat effect between the nut and the plate. There is a problem in durability such as bonding strength and fastening strength due to poor welding or corrosion due to.

Accordingly, recently, a bracket-integrated nut (commonly referred to as a "thickening nut" in the industry) has been developed in which a bracket and a nut are integrated into a vehicle body part that requires a large input point stiffness or a vehicle body part where it is difficult to apply a weld nut. Are doing.

Such a bracket-integrated nut may be formed by a process of integrally increasing the nut by forming a thick plate several times using a progressive mold.

However, conventionally, a relatively expensive progressive mold is used to form a bracket-integrated nut, and a number of processes (plate cutting, draw molding, piercing, sizing molding, upsetting, tapping processes, etc.) are required. It can cause an increase in investment and manufacturing costs, and the use of thick plates has a problem that is against the recent trend of weight reduction of the vehicle body.

The matters described in the background section as described above are prepared to enhance an understanding of the background of the invention, and may include matters other than the prior art already known to those of ordinary skill in the field to which this technology belongs.

Embodiments of the present invention are intended to provide a composite plate-integrated nut forming apparatus capable of forming a composite nut of the same material in multiple stages on a composite plate in response to the trend of weight reduction of a vehicle body.

The composite plate-integrated nut forming apparatus according to an embodiment of the present invention is for integrally forming a nut of the same material on a composite plate, and i) the composite plate having free holes and the nut are supported through a holder. Forming a lower die, ii) a heating member installed on the lower die, and iii) a nut pressing end for pressing the nut to the edge of the free hole of the composite material plate, in a vertical direction with respect to the lower die It may include an upper die installed to be movable.

In addition, in the composite plate-integrated nut molding apparatus according to an embodiment of the present invention, the pressing end of the upper die is press-fitted to the edge of the free hole of the composite plate, and the other The nut may be press-fitted, and another nut may be press-fitted onto the other nut through the holder.

In addition, in the composite material plate-integrated nut molding apparatus according to an embodiment of the present invention, the holder may support the composite material plate and the nut made of carbon fiber reinforced plastic (CFRP).

In addition, the composite plate-integrated nut molding apparatus according to an embodiment of the present invention is for integrally forming a nut of the same material on the composite plate, i) it is installed to be movable in the vertical direction through a spring, and the composite material A lower die including a holder fitted into a free hole provided in the plate, and forming a support groove on an upper surface for supporting the composite plate material inserted in the holder; ii) installed on the lower die, and into the support groove A heating member for applying heat, and iii) a nut receiving hole penetrating in a vertical direction corresponding to the holder and accommodating the nuts, and a nut pressing end protruding from a lower surface with the lower end of the nut receiving hole at the center. An upper die formed and installed to be movable in a vertical direction with respect to the lower die, and iv) a nut provided in the upper die and feeding the nuts received in the nut receiving hole along the vertical direction into the holder one by one A feeding unit, and v) a holder pressing member installed to be movable in a horizontal direction at the nut pressing end of the upper die, and pressing the holder in a state in which the nut receiving hole is closed while opening and closing the nut receiving hole. can do.

In addition, in the composite plate-integrated nut forming apparatus according to an embodiment of the present invention, the nut feeding unit includes a nut body and a plurality of press-fit projections protruding from the lower end of the nut body as the holder. Can feed.

In addition, in the composite plate-integrated nut forming apparatus according to an embodiment of the present invention, the holder is provided in a bar shape of a circular cross-section, and a spring is formed in a holder mounting groove that is elongated in a downward direction at the center of the support groove. It may be installed to be movable in the vertical direction through.

In addition, in the composite plate-integrated nut forming apparatus according to an embodiment of the present invention, the heating member may include a plurality of heating cartridges inserted into the lower die from the lower side of the support groove.

In addition, in the composite plate-integrated nut molding apparatus according to an embodiment of the present invention, the nut feeding unit is installed to be movable in a front-rear direction crossing the nut receiving hole from the upper side of the nut pressing end, and the lowermost side A first feeding slider that supports the nut of the first feeding slider, and is installed to be movable in a forward-rearward direction crossing the nut receiving hole from the upper side of the first feeding slider, and supports other nuts stacked in the vertical direction on the lowermost nut. It may include a second feeding slider.

In addition, in the composite plate-integrated nut forming apparatus according to an embodiment of the present invention, the first and second feeding sliders may be installed to be movable in the front and rear directions alternately.

In addition, in the composite plate-integrated nut molding apparatus according to an embodiment of the present invention, the first and second feeding sliders are movable in a front-rear direction crossing the nut receiving hole through the press-fit projections of the nut. Can be installed.

In addition, in the composite plate-integrated nut forming apparatus according to an embodiment of the present invention, the holder pressing member may be installed to be movable in a front-rear direction crossing the nut receiving hole at the nut pressing end.

In addition, in the composite plate-integrated nut forming apparatus according to an embodiment of the present invention, the holder pressing member opens the nut receiving hole when the nut is fed by the nut feeding unit, and lowers the upper die. Upon closing, the nut receiving hole may be closed, and the holder may be pressed.

Embodiments of the present invention can cope with the trend of weight reduction of the vehicle body, since the composite nut can be integrally formed in multiple stages on the composite plate with a simple configuration.

In addition, effects obtained or predicted by the embodiments of the present invention will be disclosed directly or implicitly in the detailed description of the embodiments of the present invention. That is, various effects predicted according to an embodiment of the present invention will be disclosed within a detailed description to be described later.

These drawings are for reference only in describing exemplary embodiments of the present invention, and therefore, the technical idea of the present invention should not be limited to the accompanying drawings.
1 is a partially exploded perspective view showing an apparatus for forming a composite plate integrated nut according to an embodiment of the present invention.
2 is a cross-sectional view illustrating a composite plate integrated nut forming apparatus according to an embodiment of the present invention.
3 is a view showing a composite nut applied to the composite plate integrated nut forming apparatus according to an embodiment of the present invention.
4 to 6 are views for explaining the operation of the composite plate-integrated nut forming apparatus according to an embodiment of the present invention and a process of forming the composite plate-integrated nut by the forming apparatus.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, the present invention may be implemented in various forms and is not limited to the embodiments described herein.

In order to clearly describe the present invention, parts irrelevant to the description have been omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

Since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to what is shown in the drawings, and the thickness is enlarged to clearly express various parts and regions.

In addition, in the following detailed description, the names of the configurations are divided into first, second, etc. to distinguish the configurations in the same relationship, and are not necessarily limited to the order in the following description.

Throughout the specification, when a part includes a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

In addition, terms such as ... unit, ... means, ... part, ... member, etc. described in the specification mean a unit of a comprehensive constitution that performs at least one function or operation.

1 is a partial exploded perspective view showing an apparatus for forming a composite plate-integrated nut according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating a combination of an apparatus for forming a composite plate-integrated nut according to an embodiment of the present invention. .

1 and 2, the composite material plate-integrated nut forming apparatus 100 according to an embodiment of the present invention may be applied to a process of forming a plate-integrated nut for mounting a predetermined vehicle body part to a vehicle body.

The composite plate-integrated nut forming apparatus 100 according to an embodiment of the present invention has a structure capable of forming a composite nut 3 of the same material in multiple stages in a composite plate 1 in response to the trend of weight reduction of a vehicle body. Consists of

The composite material plate 1 and the composite nut 3 as described above may be made of carbon fiber reinforced plastic (CFRP).

These carbon fiber reinforced plastics (CFRP) have excellent strength and elastic modulus compared to steel materials, are excellent in repetitive fatigue, have excellent dimensional stability because of a small coefficient of thermal expansion, and have excellent electrical conductivity, corrosion resistance, and vibration damping performance.

Here, the composite material plate 1 forms a free hole 2. And, the composite nut 3, as shown in Figure 3, the nut body 4, and a plurality of press-in projections 5 formed integrally protruding from the lower end of the nut body 4 (for example For example, 4) are included.

Hereinafter, based on the drawings, the upper part (upper, upper, upper and upper part) will be defined as the front/front end, and the lower part (lower, lower, lower and lower part) will be defined as the rear/rear end. .

Further, the "end (one/one end, the other/one end, front end or rear end)" in the following may be defined as either end, and a certain portion including the end (one/one end, the other It can also be defined as one/one end, front end or rear end).

The composite plate-integrated nut forming apparatus 100 according to an embodiment of the present invention basically includes a lower die 10, a heating member 30, an upper die 50, a nut feeding unit 70, and a holder pressurization. It includes the member 90, and will be described for each configuration as follows.

In an embodiment of the present invention, the lower die 10 is fixedly installed on the base frame BF. The lower die 10 has a support groove 11 for supporting the composite plate 1 formed in the center of the upper surface.

In addition, the lower die 10 is fitted into the free hole 2 of the composite material plate 1 and includes a holder 21 for supporting the composite material nut 3.

The holder 21 is installed to be movable in the vertical direction through the spring 25 in the holder mounting groove 23 formed long from the center side of the support groove 11 in the downward direction. For example, the holder 21 may be provided in a bar shape having a circular cross section.

Here, the spring 25 is mounted in the holder mounting groove 23 as a compression coil spring. The lower end of the spring 25 is fixed to the bottom side of the holder mounting groove 23, the upper end of the spring 25 is fixed to the lower end of the holder 21.

In an embodiment of the present invention, the heating member 30 applies heat from the lower die 10 to the support groove 11 and is installed in the lower die 10.

The heating member 30 includes a plurality of heating cartridges 31 inserted into the lower die 10 from the lower side of the support groove 11. The heating cartridge 31 may be provided with a heater rod or the like of a known technology that generates heat by receiving power.

In an embodiment of the present invention, the upper die 50 is provided to be movable in a vertical direction with respect to the lower die 10. The upper die 50 is installed to be reciprocated in the vertical direction through a slider (not shown in the drawings) by driving the driving means 51. Here, the driving means 51 may include a known technology driving cylinder that moves forward and backward in the vertical direction by pneumatic or hydraulic pressure.

Here, the upper die 50 includes a nut receiving hole 53 penetrating in the vertical direction corresponding to the holder 21 of the lower die 10. The above-mentioned composite nuts 3 are stacked/received in the nut receiving hole 53 in the vertical direction.

Further, on the lower surface of the upper die 50, a nut pressing end 55 protruding downward is formed with the lower end of the nut receiving hole 53 at the center. The nut pressing end 55 is formed to protrude downward from the lower surface of the upper die 50 in a shape corresponding to the support groove 11 of the lower die 10.

In an embodiment of the present invention, the nut feeding unit 70 includes the composite nut 3 accommodated in the nut receiving hole 53 of the upper die 50 in the vertical direction to the holder 21 of the lower die 10. It is for feeding so that they are inserted one by one.

The nut feeding unit 70 is installed on the upper die 50 and includes a first feeding slider 71 and a second feeding slider 72.

The first feeding slider 71 supports the lowermost composite nut 3 of the composite nuts 3 accommodated in the nut receiving hole 53, and is provided in a plate shape, and the nut pressing end 55 ) Is installed to be movable in the front-rear direction across the nut receiving hole 53 from the upper side.

In addition, the second feeding slider 72 supports other composite nuts 3 stacked in the vertical direction on the composite nut 3 at the lowermost side in the nut receiving hole 53, and is provided in a plate shape. , It is installed to be movable in the front-rear direction crossing the nut receiving hole 53 from the upper side of the first feeding slider 71.

Here, the first and second feeding sliders 71 and 72 may be installed to be movable in the front and rear directions alternately with each other. Furthermore, the first and second feeding sliders 71 and 72 may be installed to be movable in the front-rear direction crossing the nut receiving hole 53 through the press-fit protrusions 5 of the composite nut 3. have.

The first and second feeding sliders 71 and 72 may be reciprocated in the front-rear direction by a driving unit not shown in the drawing, for example, a driving device of a known technology such as an actuating cylinder.

In an embodiment of the present invention, the holder pressing member 90 presses the holder 21 in a state in which the nut receiving hole 53 is closed while opening and closing the nut receiving hole 53, and is provided in a plate shape. , It is installed to be movable in the horizontal direction on the nut pressing end 55 of the upper die 50.

The holder pressing member 90 is installed so as to be movable in a front-rear direction crossing the nut receiving hole 53 at the nut pressing end 55. The holder pressing member 90 opens the nut receiving hole 53 when feeding the composite nut 3 by the nut feeding unit 70, and when the upper die 50 is lowered, the nut receiving hole ( 53) is closed, and the holder 21 can be pressed.

Hereinafter, the operation of the composite plate-integrated nut forming apparatus according to an embodiment of the present invention configured as described above and the process of forming the composite plate-integrated nut by the molding apparatus are described in the previously disclosed drawings and the accompanying drawings. This will be described in detail.

4 to 6 are views for explaining the operation of the composite plate-integrated nut forming apparatus according to an embodiment of the present invention and a process of forming the composite plate-integrated nut by the forming apparatus.

First, in an embodiment of the present invention, as shown in FIGS. 1 and 2, a composite material plate 1 having a free hole 2 is provided. And, in the embodiment of the present invention, as shown in Fig. 3, a composite nut having a nut body 4 and a plurality of press-fit protrusions 5 integrally protruding from the lower end of the nut body 4 (3) provide them.

Here, the upper die 50 is in a state of being moved upward with respect to the lower die 10 as the driving means 51 is driven. Further, in the nut receiving hole 53 of the upper die 50, the composite nuts 3 are stacked/received in the vertical direction.

Further, the first feeding slider 71 of the nut feeding unit 70 is moved forward in a direction transverse to the nut receiving hole 53, among the composite nuts 3 accommodated in the nut receiving hole 53 It supports the composite nut (3) on the lowermost side.

And, in the state that the second feeding slider 72 of the nut feeding unit 70 is moved forward in a direction transverse to the nut receiving hole 53, the lowermost composite nut 3 in the nut receiving hole 53 ) It supports other composite nuts (3) stacked/received above and below.

Further, the holder pressing member 90 closes the lower end side of the nut receiving hole 53 while moving forward in the direction transverse to the nut receiving hole 53.

In the state as described above, in the embodiment of the present invention, as shown in FIG. 4, the composite material plate 1 is seated in the support groove 11 of the lower die 10. In an embodiment of the present invention, the holder 21 is inserted into the free hole 2 of the composite plate 1 and the composite plate 1 is seated in the support groove 11 through the holder 21.

At this time, in the embodiment of the present invention, power is applied to the heating cartridge 31 of the heating member 30 to generate heat, and the heat is applied to the composite plate 1 through the support groove 11 side. . Therefore, the composite material plate 1 is softly melted by receiving heat from the support groove 11 by the heating member 30.

Next, in the embodiment of the present invention, the first feeding slider 71 is moved backward and the holder pressing member 90 is moved backward. Then, in a state where the lower end of the nut receiving hole 53 is opened by the first feeding slider 71 and the holder pressing member 90, the composite nut located at the lowermost side of the nut receiving hole 53 (3) falls through its own weight through the lower end of the nut receiving hole 53.

Accordingly, the nut body 4 of the composite nut 3 is fitted into the holder 21, and the press-in protrusions 5 of the composite nut 3 are free holes of the composite plate 1 ( 2) It is supported on the edge side.

Then, in the embodiment of the present invention, as shown in FIG. 5, the holder pressing member 90 is moved forward in a direction crossing the nut receiving hole 53, and is closed to the lower end of the nut receiving hole 53. .

At the same time, in the embodiment of the present invention, after moving the first feeding slider 71 forward in a direction transverse to the nut receiving hole 53, the second feeding slider 72 is moved backward.

Accordingly, the composite nuts 3 accommodated in the nut receiving hole 53 are moved in a downward direction, and remain supported by the first feeding slider 71. In this state, in the embodiment of the present invention, the second feeding slider 72 is moved forward. Then, the second feeding slider 72 supports other composite nuts 3 located above the composite nut 3 at the lowermost side in the nut receiving hole 53.

Next, in the embodiment of the present invention, the upper die 50 is lowered toward the lower die 10 by driving the driving means 51. Then, the holder 21 is fitted to the lower end of the nut receiving hole 53 and is pressed by the holder pressing member 90 closing the lower end of the nut receiving hole 53.

Accordingly, the holder 21 overcomes the elastic force of the spring 25 and moves in a downward direction along the holder mounting groove 23. And, when the upper die 50 is continuously moved in the downward direction, the nut pressing end 55 of the upper die 50 is a composite nut supported by the holder 21 on the composite plate 1 Press (3).

Therefore, since the composite material plate 1 is in a softly melted state by receiving heat from the support groove 11 by the heating member 30, the press-fit projections 5 of the composite material nut 3 are holders It is melted while being pressed into the edge of the free hole 2 of the composite plate 1 by the pressing force of the pressing member 90.

Accordingly, in the embodiment of the present invention, it is possible to press-fit one composite nut 3 to the edge of the free hole 2 of the composite plate 1.

Thereafter, in the embodiment of the present invention, a series of processes as described above are repeated, and other composite nuts 3 are pressed into the composite nut 3 bonded to the composite plate 1 by pressing the protrusion 5 Press-fitting through them.

Further, in an embodiment of the present invention, when another composite nut 3 is press-fitted on the other composite nut 3 through the press-fit protrusions 5, the composite nut ( 3) It is possible to manufacture a composite plate-integrated nut 101 that is joined in multiple stages to the edge side of the free hole 2 of the composite plate 1

According to the composite plate-integrated nut forming apparatus 100 according to an embodiment of the present invention as described so far, the composite nut 3 can be formed in multiple stages on the composite plate 1 with a simple configuration, It can respond to the trend of weight reduction, and it is possible to simplify equipment investment and molding process.

Although the embodiments of the present invention have been described above, the technical idea of the present invention is not limited to the embodiments presented in the present specification, and those skilled in the art who understand the technical idea of the present invention within the scope of the same technical idea, components It will be possible to easily propose other embodiments by adding, changing, deleting, adding, etc., but it will be said that this is also within the scope of the present invention.

1: Composite plate 2: Free hole
3: composite nut 4: nut body
5: press-in projection 10: lower die
11: support groove 21: holder
23: holder mounting groove 25: spring
30: heating member 31: heating cartridge
50: upper die 51: drive means
53: nut receiving hole 55: nut pressing end
70: nut feeding unit 71: first feeding slider
72: second feeding slider 90: holder pressing member
BF: base frame 100: molding device
101: composite plate integrated nut

Claims (12)

As a composite plate-integrated nut forming device that integrally molds a nut of the same material on a composite plate,
A lower die supporting the composite material plate having a free hole and the nut through a holder;
A heating member installed on the lower die; And
Including; a nut pressing end for pressing the nut to the edge of the free hole of the composite material plate is formed on the lower surface, the upper die is installed to be movable in the vertical direction relative to the lower die; Including,
The pressing end of the upper die press-fits another nut through the holder on one nut press-fitted to the edge of the free hole of the composite material plate, and press-fits another nut on the other nut through the holder. A composite plate integrated nut molding device. delete The method of claim 1,
The holder,
The composite plate made of carbon fiber reinforced plastic (CFRP) and the composite plate integrated nut forming apparatus supporting the nut As a composite plate-integrated nut forming device that integrally molds a nut of the same material on a composite plate,
A lower die that is installed to be movable in the vertical direction through a spring and includes a holder inserted into a free hole provided in the composite material plate, and has a support groove on the upper surface for supporting the composite material plate inserted in the holder ;
A heating member installed on the lower die and applying heat to the support groove;
It includes a nut receiving hole for accommodating the nuts and penetrating in an up-down direction corresponding to the holder, forming a nut pressing end protruding from a lower surface with a lower end of the nut receiving hole at the center, An upper die installed to be movable to
A nut feeding unit provided in the upper die and feeding the nuts accommodated in the nut receiving hole along the vertical direction to be fitted into the holder one by one; And
A holder pressing member installed to be movable in a horizontal direction at the nut pressing end of the upper die and pressing the holder while opening and closing the nut receiving hole;
Composite plate-integrated nut forming apparatus comprising a. The method of claim 4,
The nut feeding unit,
A composite plate-integrated nut forming apparatus for feeding the nut to the holder, comprising a nut body and a plurality of press-fit projections protruding from a lower end of the nut body. The method of claim 4,
The holder,
A composite plate-integrated nut forming device provided in a bar shape of a circular cross section and installed to be movable in a vertical direction through a spring in a holder mounting groove formed in a downward direction at a center side of the support groove. The method of claim 4,
The heating member,
A plurality of heating cartridges inserted into the lower die from the lower side of the support groove
Composite plate-integrated nut forming apparatus comprising a. The method of claim 5,
The nut feeding unit,
A first feeding slider installed to be movable in a front-rear direction crossing the nut receiving hole from the upper side of the nut pressing end, and supporting the lowermost nut;
A second feeding slider that is installed to be movable from an upper side of the first feeding slider in a front-rear direction crossing the nut receiving hole, and supports other nuts stacked on the lowermost nut in a vertical direction
Composite plate-integrated nut forming apparatus comprising a. The method of claim 8,
The first and second feeding sliders are installed to be movable in a front-rear direction alternately with each other. The method of claim 9,
The first and second feeding sliders,
Composite plate-integrated nut molding apparatus that is installed to be movable in a front-rear direction crossing the nut receiving hole through the press-fit projections of the nut. The method of claim 4,
The holder pressing member,
Composite plate-integrated nut forming apparatus installed to be movable in a front-rear direction crossing the nut receiving hole at the nut pressing end. The method of claim 11,
The holder pressing member,
When feeding the nut by the nut feeding unit, the nut receiving hole is opened,
When the upper die is lowered, the nut accommodating hole is closed and the composite material plate-integrated nut forming apparatus presses the holder.

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