KR101228811B1 - Mold for Hydro-Forming of Closed-Member and Method for Manufacturing Integration Parts using The Same, and Integration Parts - Google Patents

Mold for Hydro-Forming of Closed-Member and Method for Manufacturing Integration Parts using The Same, and Integration Parts Download PDF

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Publication number
KR101228811B1
KR101228811B1 KR1020100136125A KR20100136125A KR101228811B1 KR 101228811 B1 KR101228811 B1 KR 101228811B1 KR 1020100136125 A KR1020100136125 A KR 1020100136125A KR 20100136125 A KR20100136125 A KR 20100136125A KR 101228811 B1 KR101228811 B1 KR 101228811B1
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hydroforming
mold
waste material
hydraulic pressure
parts
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KR1020100136125A
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Korean (ko)
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KR20120074159A (en
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정기석
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주식회사 포스코
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Abstract

Provided are a mold for hydroforming a waste material, an integrated part manufacturing method using the same, and an automobile part manufactured therefrom.
The hydroforming mold of the waste material includes upper and lower molds into which the waste material is press-fitted, and any one of the upper and lower molds is further provided with an adhesive protrusion integrally provided to enable the hydraulic application of the material. One of the upper and lower molds and the contact protrusion may be provided with a hydraulic pressure application passage communicating with a hydraulic pressure application hole formed in the material.
According to the present invention as described above, it is possible to manufacture one integrated part in which related parts replace subassemblies assembled by one set mechanism (apparatus), thereby improving the assemblability and in particular the assembly dimension by the integrated part. While improving the precision, an improved effect of increasing the durability and productivity of the finished device (apparatus) using the same can be obtained.

Figure R1020100136125

Description

Mold for Hydro-Forming of Closed-Member and Method for Manufacturing Integration Parts using The Same, and Integration Parts}

The present invention relates to a hydroforming mold of a waste material, a method for manufacturing an integrated part using the same, and an automobile part manufactured therefrom. More particularly, the related parts, such as an automobile suspension, are assembled into one set mechanism (device). It is possible to manufacture an integrated part that replaces the accessory parts, so as to improve the assemblability, in particular to improve the assembly dimensional accuracy by the integrated part, and to increase the durability and productivity of the finished device (device) using the same. It relates to a hydroforming mold of a waste material, an integrated part manufacturing method using the same, and an integrated part.

A motor vehicle is manufactured in order to assemble several set mechanisms (devices) into one complete vehicle, for example, in the case of an automobile suspension, at least four members (parts) are assembled and provided as one set mechanism.

Of course, in the automobile, in addition to the suspension shown in FIG. 1, various related parts, such as a seat frame and an engine cradle, are assembled and provided as a single set mechanism (device). Will produce a finished car.

That is, the set mechanisms which are closely related to each other are assembled to facilitate the assembly of the motor vehicle. In particular, the vehicle body, frame, various supports, and the like are provided as a set mechanism.

For example, in FIG. 1, the suspension 10 is illustrated as such a set mechanism. In the case of the suspension 10, there are differences depending on a vehicle model and a standard, but as shown in FIG. 1, both side members ( The front and rear members 14 and 16 are assembled or joined to 12a) 12b.

However, the set mechanism in which such accessory parts are provided is assembled, and the unit parts (accessory parts) are likely to be thermally deformed by welding or the like during actual assembly, and the error management between parts must be very precisely and strictly managed, and the process variation There are many difficulties, such as designing for easy compensation.

Therefore, in modern automobiles, research is being conducted to reduce the number of unit parts of the set mechanisms, and in particular, the difference in the electricity consumption according to the weight of the vehicle is severe, which is the case of the electric vehicle body which affects the battery charging time. do.

Of course, in the case of general cars, research is focused on the lightweight structure, since it is related to fuel efficiency, which has the greatest impact on consumers.

On the other hand, hydro-forming to form a material into a desired shape by applying a hydraulic pressure to the tube (material) is known, and in recent years, attention has been focused on the application to automotive parts for lighter parts.

Hydro-Forming, for example, is a special processing method of mechanical sheet metal that is formed at room temperature (10 ° C ~ 30 ° C) and expands the tube (tube) by using hydraulic pressure. Warm hydraulic forming.

This hydroforming technology uses a tube made of a seam welded (or resistance welded) component that is joined by conventional welding, etc., and punches both ends of the tube with a punch seal. It is a technique which raises (water pressure) and shape | molds to a desired form.

In recent years, such a hydroforming technology is typically used in the automotive industry, for example, it is possible to reduce the molding cost and the weight of the press product made of a combination of large and small unit panels, such as front side members, bumpers.

In general, however, the hydroforming is limited to the material of interest in a tube in which a hole for applying hydraulic pressure is formed.

Thus, although each component 12a, 12b, 14, 16 of the suspension 10 can be replaced with a hydroforming product in FIG. 1, a single integrated component combining all of them is replaced with a hydroforming. Is difficult.

For example, the material of the closed structure is difficult to apply the hydraulic pressure required for hydroforming.

Accordingly, the various parts provided by the applicant's set mechanism of the present invention are replaced with a replacement of the closed structure (welded pipe material, etc.) and an integrated part is provided through hydroforming, thereby providing the accessory parts of the existing set mechanism with one of the present invention. The present invention has been proposed which makes it possible to replace the integrated parts.

Since the parts of the present invention can replace several existing parts with one integrated part, it has been proposed the present invention that enables the weight of the assembly device (finished car, etc.) in which the parts and parts are assembled above all.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to manufacture one integrated part by substituting accessory parts assembled with one set mechanism (device), such as a vehicle suspension. To improve the assemblability, and in particular, to improve the assembly dimensional accuracy of the integrated parts, and to increase the durability and productivity of the finished device (apparatus) using the same. A manufacturing method and an integrated component are provided.

As one technical aspect for achieving the above object, the present invention includes an upper and lower mold in which the waste material is press-fitted,

One of the upper and lower molds, further provided with an adhesive protrusion integrally provided to enable the hydraulic pressure of the material,

One of the upper and lower molds and the contact protrusions are provided with a hydraulic pressure application passage communicating with a hydraulic pressure application hole formed in the material.
On the opposite side of the close contact protrusion is provided in any one of the upper, lower molds, the communication hole formed in the material is formed to provide a hydroforming mold of the waste material further comprising a closed exhaust passage during molding.

Preferably, the sealing member is further provided around the contact protrusion of the mold.

delete

In another aspect, the present invention is to prepare a waste material; And

A hydroforming step of pressing the waste material into the hydroforming mold and applying a hydraulic pressure to form the integrated part;

, ≪ / RTI >
In the initial stage of hydroforming through the hydraulic pressure application of the material, it provides an integrated part manufacturing method using a hydroforming mold of the waste material to discharge the air in the material through the hole of the material and the exhaust passage of the mold, and then sealed.

delete

More preferably, prior to hydroforming of the material, a pre-forming step of pre-forming the material.

In addition, as another technical aspect of the present invention, a waste material provided to be capable of applying hydraulic pressure is formed through hydroforming, wherein the waste material is formed with a hydraulic pressure application hole, and the waste material is used for hydroforming the waste material. It is to provide an integral part that is hydroformed using a mold.

delete

According to the hydroforming mold of the waste material of the present invention, a method of manufacturing an integrated part using the same, and an integrated part, related parts, such as an automobile suspension, are replaced by an accessory part assembled by one set mechanism (device). It is possible to manufacture an integrated part of the assembly, and to improve the assemblability.

In particular, the present invention improves the assembly dimensional precision by the integrated parts, while also providing the effect of increasing the durability and productivity of the finished device (apparatus) using the same.

1 is a block diagram showing a conventional vehicle suspension that can be replaced with an integrated part through the hydroforming of the present invention
2 is a schematic diagram showing preforming and hydroforming as forming steps of the integral part of the present invention;
3 is a schematic perspective view of the pre-forming state in FIG.
4 is a perspective view illustrating hydroforming of a pre-formed material
Figure 5 is a block diagram showing a hydroforming state of the present invention including the 'A' component in the mold of hydroforming according to the present invention
Figure 6 is a distribution diagram showing the analysis results of the hydroformed integral parts
7A-7C are schematic diagrams showing the possibility of replacing the present invention integrated parts of existing vehicle set mechanisms (parts).
8 is a perspective view illustrating a state in which the parts of the existing seat frame are replaced with the integrated parts of the present invention.

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

First, FIG. 2 illustrates an integrated part 100 manufactured through hydroforming using a hydroforming mold 300 of waste material according to the present invention.

That is, as shown in Figure 2, the premise of molding the integrated part 100 of the present invention, the waste material 110, that is, the hydroforming in the mold is possible, but the material of the closed structure (110) to be manufactured as an integrated part ) First.

Such waste material 110 can actually be bent and provided with a pipe of a desired material having a predetermined inner diameter, and the interface of the pipe is welded to form a closed structure.

At this time, although schematically shown in the drawing, in order to prepare the waste material 110 first, a jig or the like necessary for welding is required.

Next, as shown in Figure 2, the waste material of the present invention can be prepared first, pre-formed material 120 before hydroforming, as described in detail in the following Figures 4 and 5.

For example, as shown in FIG. 3, the pre-formed material 120 is not hydroformed at once and is pre-formed when the molding structure of the integrated part 100 is complicated or the material rigidity is thick. Is performed first, or in particular, as shown in FIG. 3, the material is pre-formed prior to hydroforming into areas where compression is required and shaping.

This pre-forming will increase the lifespan or durability by avoiding excessive load on the material and mold in one hydroforming process.

At this time, in addition to the upper, lower mold (die) (210) 220 during pre-forming as shown in Figure 3 may be used side-side forming mold 230.

Next, as shown in FIG. 2, the pre-formed material 120 is finally manufactured as a hydroformed material 130, that is, the integrated component 100.

At this time, it is important that in the case of the hydro-forming, as described above, the hydraulic pressure (H) must be applied, so that in order to apply the hydraulic pressure to the interior of the material of the closed structure, a hole is formed in the material, and the passage of the passage communicating therewith. Since the coupling is necessary, it is necessary to ensure sealing property when applying a high pressure hydraulic pressure (hydraulic).

Therefore, first, as shown in FIGS. 4 and 5, the hydroforming mold 300 of the waste material of the present invention will be described first. However, in order to further understand, in FIG. 4, the mold and the hydroformed material 130, that is, the integrated parts are shown in color. In this case, 'A' in FIG. 4 and FIG. 5 denotes the same parts.

That is, as shown in Figures 4 and 5, the hydroforming mold 300 of the waste material of the present invention is basically provided with processing groove parts not indicated by a separate reference inside, closed during hydroforming The material 110 (indicated by 130 of the Hyform-formed material in FIG. 5) includes upper and lower molds 310 and 320 that are press-fitted.

At this time, in order to apply the hydraulic pressure to the waste material 110, which is not an open structure on both sides as in the conventional tube, the mold 300 of the present invention, as shown in Figure 5, the upper, lower mold 310 At any one of the) 320, the adhesion protrusion 330 which is integrally provided to enable the application of the hydraulic pressure (H) to the material is further provided.

Preferably, the contact protrusion 330 is formed on the lower mold 320 rather than the upper mold 310 which needs to be lifted in the present embodiment.

That is, the close contact protrusion 330 of the present invention, as shown in the image in Figure 4, is provided as a conical protrusion in which a portion of the mold is integrally projected, so that the material is primarily pressed (compressed) between the molds When the contact protrusion 330 presses the material while pressing the material, a concave indentation portion corresponding to the contact protrusion is formed in the material.

Therefore, in the mold of the present invention, the adhesion protrusion 330 is in close contact with the material while forming more contact area, and when the hydraulic pressure is applied through the adhesion protrusion, the molding failure due to leakage of the hydraulic pressure to the outside is achieved. It can be prevented.

In this case, as shown in FIGS. 4 and 5, the hydraulic pressure is applied to any one of the upper and lower molds, that is, the lower mold and the contact protrusion 330 in communication with the hydraulic pressure application hole h formed in the material 130. The passage 350 is provided, and the hydraulic pressure application punch 360 is press-fitted to the end thereof.

Therefore, when the hydraulic pressure H is applied to the material pressed between the upper and lower molds through the punch-> path 350-> adhesive protrusion passage-> material hole h, the hydroforming in the desired shape, that is, FIG. As shown in the distribution diagram, the appropriate integrated parts can be provided.

In addition, although not shown in the drawings by a separate reference, a concave portion in which the material is convex may be formed in the upper mold corresponding to the contact protrusion of the lower mold.

Preferably, as shown in Figure 5, the sealing member 332 is further provided around the close contact protrusion 330 formed in the lower mold.

Therefore, when hydraulic pressure is applied from the lower mold adhesion protrusion 330 to the material hole, the hydraulic pressure does not leak through the adhesion protrusion outer edge portion of the sealing member O-ring which is tightly compressed, so that the normal pressure is maintained when the hydraulic pressure is applied. .

Next, in the mold 300 of the present invention, the exhaust hole h 'formed on the opposite side of the material hole to which the hydraulic pressure is applied to any one of the upper and lower molds, ie, the lower mold, on the opposite side of the contact protrusion. Exhaust passages 340 communicating with each other may be further provided.

However, the exhaust passage 340 of the lower mold is not always opened, and the air inside the material can be discharged at the initial stage when the hydraulic pressure is applied during hydroforming, thereby uniformly applying the hydraulic pressure in the material. If possible, it is necessary to close the passage immediately as the closure 370 over time.

Of course, although not shown in the drawings, it may be possible to form the close contact portion on the left side in FIG.

Therefore, using the hydroforming mold 300 of the waste material of the present invention described so far enables the hydroforming of the material of the waste structure which has not been previously formed, which in turn is one of several accessory parts of the automobile set mechanism. It is possible to manufacture the integrated component parts.

That is, when the manufacturing step of the integrated component 100 using the hydroforming mold 300 of the waste material of the present invention is arranged, as shown in FIG. 2, the first step of preparing the waste material 110, and The waste material 110 is press-fitted into the hydroforming mold 300 of the waste material described above, and the hydraulic pressure H is applied through the passage 350 and the material hole h to integrate the integrated part 100, that is, the hydro. The formed material 130 may be formed by hydroforming.

Of course, in the initial stage of hydroforming of the hydraulic pressure of the material, the air in the material is discharged through the hole h 'of the material and the exhaust passage 340 of the mold to the opposite side, and then the air is sealed by the sealing opening 370. It is necessary to block the leakage of the hydraulic pressure, that is, the expansion liquid and to allow a stable inlet pressure to be applied.

However, according to the molding structure of the integrated part, as shown in FIG. 3, before the hydroforming of the material, the pre-forming step of pre-forming may be further roughened.

Meanwhile, an application example of an automotive component of the hydroformed integrated part 100 is illustrated in FIGS. 7 and 8.

That is, as shown in Figure 7a, in the case of the engine cradle 20, the existing six parts can be reduced to one in the case of the automobile part 100a of the present invention, as shown in Figure 7b, the suspension 100 In the case of), four parts can be reduced to one car part 100, and even in the case of a radiator upper part 40 as shown in FIG. 7C, one car part 100b may be manufactured.

Alternatively, in the case of the automobile seat frame 40, as shown in FIG. 8, two parts of the cushion-side frames 42 and 44 and two seat-side frames 46 and 48, respectively, are used as the automobile parts of the present invention. 6 to 100), the sheet frame 400 can be manufactured.

While the invention has been shown and described in connection with specific embodiments so far, it will be appreciated that various changes and modifications can be made in the art without departing from the spirit or scope of the invention as set forth in the claims below. It is to be understood that one of ordinary skill can easily know.

100 .... Integrated parts 110 .... Waste material (molded material)
120 .... pre-ported material 130 .... hydroformed material
200 .... pre-forming mold 300 .... mold for hydroforming
310,320 .... upper and lower molds 330 .... contact protrusion
340,350 .... Exhaust and hydraulic passage 360 .... Hydraulic pressure punch

Claims (8)

Including the upper and lower molds to which the waste material is pressed,
One of the upper and lower molds, further provided with an adhesive protrusion integrally provided to enable the hydraulic pressure of the material,
One of the upper and lower molds and the contact protrusions are provided with a hydraulic pressure application passage communicating with the hydraulic pressure application holes formed in the material.
The hydroforming mold of the waste material further comprising an exhaust passage formed in communication with the exhaust hole formed in the material in one of the upper and lower molds on the opposite side of the contact protrusion, and closed during the molding.
The method of claim 1,
A mold for hydroforming a waste material, characterized in that a sealing member is additionally provided around the adhesion protrusion of the mold.
delete Preparing waste material; And
A hydroforming step of inserting the waste material into the hydroforming mold according to claim 1 or 2, and molding the waste material into an integrated part by applying a hydraulic pressure;
, ≪ / RTI >
In the initial hydroforming by applying the hydraulic pressure of the material, the air in the material through the hole of the material and the exhaust passage of the mold discharge the air in the material, and then closed the method for manufacturing an integrated part using a hydroforming mold of the closed material.
delete 5. The method of claim 4,
A pre-forming step of pre-forming the workpiece before hydroforming the workpiece;
Integrated parts manufacturing method using a hydroforming mold of the waste material further comprising a.
A waste material provided to be capable of applying hydraulic pressure is formed through hydroforming, wherein the waste material is formed with a hydraulic pressure application hole, and the waste material is hydroformed using the hydroforming mold according to claim 1. Integrated parts. delete
KR1020100136125A 2010-12-27 2010-12-27 Mold for Hydro-Forming of Closed-Member and Method for Manufacturing Integration Parts using The Same, and Integration Parts KR101228811B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104588440A (en) * 2014-12-31 2015-05-06 哈尔滨工业大学 Device and method for testing non-uniform pressure field of viscous medium during pressure forming

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104515735B (en) * 2014-12-31 2017-02-22 哈尔滨工业大学 Viscous adhesive force testing device for viscous pressure forming and testing method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11156453A (en) * 1997-11-25 1999-06-15 Nippon Yakin Kogyo Co Ltd Superplastic forming die and superplastic forming method using it
KR20050068051A (en) * 2003-12-29 2005-07-05 주식회사 포스코 Method for manufacturing stainless engine cradle using hydroforming process
KR100599002B1 (en) * 2005-05-27 2006-07-10 현대하이스코 주식회사 Manufacture method of front side member use of hydroforming
JP2008302404A (en) * 2007-06-08 2008-12-18 Nissan Motor Co Ltd Hydraulic forming method for laminated plate and apparatus therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11156453A (en) * 1997-11-25 1999-06-15 Nippon Yakin Kogyo Co Ltd Superplastic forming die and superplastic forming method using it
KR20050068051A (en) * 2003-12-29 2005-07-05 주식회사 포스코 Method for manufacturing stainless engine cradle using hydroforming process
KR100599002B1 (en) * 2005-05-27 2006-07-10 현대하이스코 주식회사 Manufacture method of front side member use of hydroforming
JP2008302404A (en) * 2007-06-08 2008-12-18 Nissan Motor Co Ltd Hydraulic forming method for laminated plate and apparatus therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104588440A (en) * 2014-12-31 2015-05-06 哈尔滨工业大学 Device and method for testing non-uniform pressure field of viscous medium during pressure forming

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