KR20090132701A - Progressive forming method for automotive seat bracket - Google Patents

Abstract

PURPOSE: A progressive molding method for a vehicle seat bracket is provided to carry out punching and bending at the same time and to obtain two seat brackets in a single process. CONSTITUTION: A progressive molding method for a vehicle seat bracket is as follows. While a metal sheet successively moves between top and bottom dies(10,20) by predetermined pitch, one or more of cutting, punching, and bending are successively performed so that two seat brackets are formed at a time. In the final process of progressive molding, the two seat brackets are separated by punching and the ends of the separated seat brackets are bent. Therefore, the seat brackets are completed in a single set of die.

Description

PROGRESSIVE FORMING METHOD FOR AUTOMOTIVE SEAT BRACKET}

The present invention relates to a progressive forming method for the manufacture of an automobile seat bracket capable of completing the automobile seat bracket in a set of molds using the progressive forming method.

At present, it is very important for the auto parts market to produce high quality low price products regardless of globalization nationalities. If only high quality and price competitiveness are secured, it is not difficult to develop not only domestic automobile manufacturers but also overseas markets. In recent years, as the technology gap is narrowed and the market of domestic companies is eroded by low wages, productivity improvement and technology development are very important.

1 is a state diagram used in the automobile seat bracket. As shown in FIG. 1, the automobile seat bracket 1 is used to fix the seat of the vehicle on the body frame 100.

BRACKET, which connects the car body and the seat in Korea, is being produced by several press companies but requires six steps. Each process requires press, mold and manpower.

There is a need for the development of progressive molding technology that can reduce costs and secure price competitiveness in the international market by shortening many of these conventional short processes to continuous processes.

The present invention has been made to solve the above problems of the prior art to provide a method for completing a car seat bracket in a set of mold using a progressive molding method.

The object of the present invention described above is that the metal sheet material is moved by the predetermined pitch between the upper mold provided with a shape at a predetermined pitch and the lower mold provided with a shape at a predetermined pitch. In the progressive molding method for manufacturing a car seat bracket while at least one of a cutting process, a perforation process and a bending process is performed, the upper mold and the lower mold are on both sides of the metal sheet material with respect to the center line parallel to the moving direction of the metal sheet. Each of the shape is provided symmetrically to perform the cutting process, the perforating process and the bending process on both sides of the metal plate based on the center line to sequentially mold the two car seat bracket at a time, the progressive forming method of In the final forming process, by the punching process passing through the center line An end of the car seat bracket formed while the car seat brackets are separated by the bending process of an end of the car seat bracket which is formed while the two car seat brackets are separated from each other and the car seat brackets are separated and the car seat brackets are separated. The bending is achieved by a progressive molding method for manufacturing a car seat bracket, characterized in that is carried out at the same time.

In order to achieve the above object, in the last forming step, the first to form a car seat bracket characterized in that the two car seat bracket is separated and then the end formed by separating the two car seat bracket is bent. Molding method.

In order to achieve the above object, the part of performing the last molding process of the upper mold is formed around the punching blades and the punching blades fixedly formed on the upper plate which can be pressed down and plate-joined on the lowermost side of the outer part. A surface is formed and the receiving portion recessed upward of the plate joining surface is provided and includes a movable plate elastically supported on the upper plate. The portion of the lower mold performing the final forming process is fixed to the lower plate and the upper mold inside. Punching blade receiving hole through which the punching blade of the passage is formed and the outer surface of the punching blade receiving portion formed with a guide surface formed with a guide surface, the contact surface contacting the plate-bonding surface of the moving plate is formed And it is preferable to include a plate bonding surface contact portion that is elastically supported on the lower plate.

According to the progressive molding method for manufacturing a car seat bracket according to the present invention, a punching process for separating two car seat brackets connected in the final step of the progressive molding method of the car seat bracket and a bending process of one end of the car seat bracket separated from each other Since this is done at the same time, the molding of the car seat bracket can be completed in the progressive molding process in a set of upper and lower molds.

Hereinafter, with reference to the accompanying drawings will be described in detail a progressive molding method for manufacturing a car seat bracket according to a preferred embodiment of the present invention.

2 is a perspective view of a vehicle seat bracket molded according to the progressive forming method of the vehicle seat bracket according to a preferred embodiment of the present invention. As shown in Fig. 2, the vehicle seat bracket 1 is a structure in which the whole is seamlessly molded integrally. Thus, the automobile seat bracket can be manufactured by applying the processes of cutting, drilling and bending several times to the metal sheet.

The vehicle seat bracket (1) has a pitch reference hole (8), a fixing piece hole (5), and an incision (6), and has a protruding portion (2) in the center, a front edge flange (3), and a rear edge flange ( 4) and end 7 formed by cleavage.

FIG. 3 is a plan view illustrating a forming state of a metal plate formed at each sequential forming step according to a progressive forming method of a vehicle seat bracket according to a preferred embodiment of the present invention. With reference to Figure 3 can be confirmed for the sequential process that the car seat bracket is completed.

Cutting by punching, hole formation by punching, bending process described below are known to those skilled in the art in press working, so the following description of the specific mold structure that does not directly affect the present invention will be omitted and sequential molding step It demonstrates on the basis of the molding state of the metal plate material manufactured by the following.

The metal sheet member is formed with car seat brackets, one on each side based on the center line. In the progressive forming method, since the center line portions of the metal sheet are all connected along the moving direction, all the portions of the metal sheet move by one pitch when the metal sheet moves by one pitch.

As shown in FIG. 3, the pitch reference hole 8 is formed for sequential molding while initially moving the metal plate at the same pitch (S1). The upper mold (not shown) is formed with a pitch reference protrusion inserted into the pitch reference hole to ensure that the metal sheet is molded in the state of exactly moving by the pitch. The metal plate of Figure 3 includes an idle step that passes without forming is performed, which is intended to make the most of the existing mold, such as when the specification of the product is modified later.

Next, in order to form the edge profile of one side of the automobile seat bracket, a portion of one side of the edge of the automobile seat bracket to be formed is punched out in the intended shape in the metal sheet (S2).

Next, in order to form the edge contours of the other side of the automobile seat bracket, the portion where the edge of the other side of the automobile seat bracket is to be formed is punched and cut into the intended shape in the metal sheet (S3).

The process up to now completes the shaping of the edge contours of the rest of the car seat bracket except for the portion adjacent to the centerline of the metal sheet.

Next, a part to be protruded in a drawing molding manner is formed at the center of the part where the car seat bracket is to be molded (S4).

Next, the flanges 3 and 4 are formed at the front edge and the rear edge by bending the front edge and the rear edge of the portion where the vehicle seat bracket is to be molded (S5).

Next, the vehicle seat bracket is bent between two points of the protruding portion in the center of the portion to be molded so that both sides of the bending point are two-stage structure (S6).

Next, the vehicle seat bracket is bent so as to step down the bent portion with one end of the portion to be molded (S7).

Next, the fixing piece hole 5, the cutout portion 6, and the expanded pitch reference hole through which the fixing piece of the portion to which the automobile seat bracket is to be molded are formed by punching (S8). The expanded pitch reference hole is for correcting that the pitch reference hole initially formed as a result of deformation of the metal plate material by the previous forming processes by expanding the pitch reference hole formed in step S1 is deformed or repositioned.

Next, the car seat bracket is cut into the shape intended to bend the end of the bent portion upward into the memory of the portion to be molded, while simultaneously forming the front portion contour of one side of the edge of the portion to be formed by the car seat bracket adjacent to the center line. Perform (S9).

Next, the car seat bracket adjacent to the center line is cut to the intended shape to form a rear portion contour of one side of the edge of the portion to be molded. (S10)

As a final process of progressive forming of the car seat bracket, the car seat bracket adjacent to the center line of the metal sheet is connected by the center line portion of the metal sheet by punching the center portion located between the front part and the rear part on one side of the edge of the part to be formed. Progressive molding of the automobile seat bracket is completed by bending the end portions 7 of the portions to be cut off the car seat bracket to be molded, while cutting the parts to be molded from the metal sheet. Here, the parts to be formed of two automobile seat brackets are cut and separated from the metal plate by a punching blade (not shown) passing through the punching blade passing hole 23 to perform punching cutting, and cut by the guide surface 24. As the bending of the end of the portion to be separated car seat bracket is to be made will be described in detail later.

Hereinafter, the final process of the progressive forming of the automobile seat bracket will be described in detail with reference to FIGS. 4 to 6.

4 to 7 is a vehicle formed by the punching process for the separation of the two car seat brackets connected laterally which is the final process of the progressive forming method of the automobile seat bracket according to the preferred embodiment of the present invention and the punching process for separation It is a conceptual diagram which shows the bending process of one end part of a seat bracket sequentially.

As shown in FIG. 4, the upper mold 10 has a punching protrusion 12 positioned on the upper plate 11 pressurized by a press device, and the upper plate 11 around the punching protrusion 12. The movable plate 13 is formed to be elastically supported in the. The movable plate 13 is formed with a plate joining surface 14 which is in close contact with the metal plate material to the outside, and a receiving portion 15 recessed above the plate joining surface 14 inside the plate joining surface 14 is formed. .

The lower mold 20 has a punching edge receiving portion 22 formed on the lower plate 21, and the punching edge receiving portion 22 has the punching protrusion 12 of the upper mold 10 at the upper center thereof. The punching blade passing hole 23 passing therethrough is downwardly formed, and the outer side is formed with a guide face 24 for guiding the bending of the metal sheet. The lower plate 21 is a plate-bonding surface contact portion 25 having a contact surface 26 contacting the plate-bonding surface 14 of the moving plate 13 to an outer side of the punching blade receiving portion 15. It is formed to be elastically supported.

As shown in FIGS. 4 and 5, when the upper plate 11 of the upper mold 10 is pressed, the upper plate 11 and the movable plate 13 are lowered, and the plate of the movable plate 13 of the upper mold 10 is lowered. The joining surface 14 descends while pushing the metal plate material and comes into close contact with the contact surface 26 of the plate joining surface contact portion 25 of the lower mold 20.

As shown in FIG. 6, when the upper plate 11 of the upper mold 10 is further lowered, the punching blade 12 fixed to the upper plate 11 is formed of the punching edge receiving portion 15 of the lower mold 20. As the punching blade passes through the hole 23, the center of the metal sheet is punched out.

As shown in FIG. 7, the portion adjacent to the punched cut end of the metal sheet is the plate-bonding surface contact portion 25 of the plate bonding surface 14 and the lower mold 20 of the upper mold 10 and the movable plate 13. At the time of being bitten down by the contact surface 26 of), the punched cut end portion of the metal sheet is bent vertically by the guide surface 24 on the outer side of the punching protrusion accommodation portion 22.

In the final step of the progressive forming method of the automobile seat bracket described above, the punching process for separating the two car seat brackets connected and the bending process of one end 7 of the separated car seat bracket are simultaneously performed. This may be completed in the progressive forming process in a set of upper and lower molds. If the punching process for separating two laterally connected car seat brackets and the bending process for the separated ends of the car seat bracket are separated from each other, then the two cars already separated from the metal plate after the punching process for separation The seat brackets cannot be moved automatically in the bending process. Therefore, another set of molds should be prepared to perform the process of bending the separated ends of the car seat bracket separately.

In order to increase the clearance of the reference pitch hole due to the deformation caused by forming, it is preferable to enlarge the guide hole by punching at a specific stage.

1 is a state diagram used in the automobile seat bracket.

2 is a perspective view of a vehicle seat bracket molded according to the progressive forming method of the vehicle seat bracket according to a preferred embodiment of the present invention.

3 is a plan view showing a metal plate material to which the progressive molding method of the automobile seat bracket according to the preferred embodiment of the present invention is applied.

4 to 7 are conceptual views sequentially showing the final process of the progressive forming method of the vehicle seat bracket according to a preferred embodiment of the present invention.

Claims (3)

The metal sheet is moved between the upper mold provided with a shape for each predetermined pitch and the lower mold provided with a shape for each predetermined pitch, and the cutting and drilling process is performed by the occlusion and separation of the upper mold and the lower mold while the metal sheet is moved by the predetermined pitch. In the progressive molding method for manufacturing a car seat bracket while at least one of the bending process is performed, The upper mold and the lower mold are provided with symmetrical shapes on both sides of the center line parallel to the moving direction of the metal plate, and the cutting process, the drilling process and the bending on both sides of the metal plate based on the center line. Process to mold two car seat brackets at a time, End of the car seat bracket formed by the two car seat brackets are separated from each other and the car seat brackets are separated and the car seat brackets are separated by a punching process passing through the center line in the last forming step of the progressive forming method. Progressive molding method for manufacturing a car seat bracket, characterized in that the bending of the end of the car seat bracket formed while the car seat brackets are separated by the bending process of the same time. The method of claim 1, In the last forming step, first the two car seat brackets are separated and then the end portions formed by separating the two car seat brackets are bent. The method of claim 2, Part of the upper mold to perform the last forming process is formed around the punching blades and the punching blades fixed to the upper plate that can be pressed down can be formed on the bottom side of the outer side plate joining surface and the plate bonding It is provided with a receiving portion recessed upward of the surface and provided with a movable plate elastically supported on the top plate, A punching blade receiving portion having a punching blade passing hole through which the punching blade of the upper mold passes and a guide surface formed on an outer side of the lower mold, the portion of which performs the last molding process is fixed to a lower plate; A progressive forming method for manufacturing a car seat bracket, characterized in that the outer surface of the punching projection receiving portion is formed in contact with the plate bonding surface of the moving plate is formed and the plate bonding surface contact portion elastically supported on the lower plate.

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