KR101134942B1 - Metallic patterns of a simultaneous forming press with clinching - Google Patents

Abstract

According to the present invention, after press forming the upper panel and the lower panel, the parts are heated in a hot state by high frequency induction heating, and the heating parts are clinched to reduce the number of molds required, shorten the processing time, and improve the bonding force between the panels. The present invention provides a press mold for clinching co-molding that strengthens and secures the degree of coupling.

Press mold, simultaneous molding, clinching, hot, high frequency induction heating

Description

Crushing Press Mold for Simultaneous Molding {METALLIC PATTERNS OF A SIMULTANEOUS FORMING PRESS WITH CLINCHING}

The present invention relates to a press mold for clinching co-molding, and more particularly, by press molding the upper panel and the lower panel, and then clinching in a partial hot state to reduce the number of molds required and to shorten the processing time. The present invention relates to a press mold for clinching co-molding that enhances the binding force between the teeth.

As is well known, the press working is a processing method in which a shape of a panel is formed by applying a force to the panel and plastic deformation. Such press working is generally performed by putting a blank in the form of a plate into a press equipment and placing the blank on a lower mold of a metal pattern, and then lowering the upper mold to deform the material with respect to the lower mold.

For example, an average of 1,000 parts or more of body panels are developed from an automobile maker to the development and production of a first automobile model, and in order to produce a panel of one part, forming is carried out by pressing a certain form through various kinds of press equipment. After the molding process, the product panel is processed through an average of four or more processes such as molding, cutting, hole processing, and bending in press processes such as trimming, piercing, flanging, and hemming. It is produced, the forming molding process is a process of plasticizing the material according to the product data is the main process for determining the quality of the product panel more than 90%.

As described above, in the press apparatus for forming molding, as shown in FIG. 1, a lower mold 101 having a lower surface shape of a product panel is mounted on a lower bolster 103, and an upper portion of the lower mold 101 is mounted on the lower mold 101. An upper mold 111 having an upper surface shape of a product panel is mounted on a slide 109 that is an upper press body, and a panel (not shown) is sandwiched between the lower mold 101 and press-molded to press it. The panel is molded.

As shown in FIG. 2, in the mold of a general press applied to such a forming process, a lower mold 101 having a lower surface shape of a product panel is mounted on a lower bolster 103. On the outside, a blank holder 107 is mounted to the bolster 103 via a cushion pin 105.

In addition, the upper mold 111 having the top surface shape of the product panel at the upper portion of the lower mold 101 is mounted on the slider 109 at the upper portion of the blank panel 101 which is inserted between the lower mold 101 and the blank. The upper part is pressed in the state spanning the holder 107 to form the product panel.

That is, as shown in FIG. 2, first, when the upper mold 111 and the blank holder 107 are raised, and the material panel 113 is inserted between the upper mold 111 and the lower mold 101, FIG. 3. As in, the upper die 111 is lowered operation by the die face surface 115 of the upper die 111 and the die face surface 117 of the blank holder 107 the material panel 113 is the outer end thereof. Is held.

In this state, as shown in Figure 4, the upper die 111 and the blank holder 107 together, the lowering operation to hold the material held on each die face surface (115, 117) of the upper die 111 and the blank holder 107 As the panel 113 is gradually introduced into the molding part, the panel 113 is molded along the shape of the product, and the upper mold 111 is press-molded into the product panel at the moment when the upper mold 111 is completely matched with the lower mold 101.

As described above, the material panel 113 having completed molding is lifted by the blank holder 107 in a state where the upper mold 111 is raised, as shown in FIG. 5, and is removed from the press equipment by the take-out hanger 121. It is taken out.

However, according to the prior art as described above, in order to manufacture a structure in which the other panel is coupled to the bottom of one panel, four molds for manufacturing the upper panel, and 4 * N for producing the lower panel (where N is A total of 4N + 4 molds, such as the number of lower panels), were produced.

In addition, since each panel is manufactured after joining them, the time required for manufacturing the product panel as a final structure takes a lot of time as 'unit pressing time * number of panels + time required for joining' (wherein the 'unit' 'Pressing time' refers to the time taken to press a material panel to produce one product panel), as well as a lot of variation in joining each separately manufactured panel.

In addition, in this case, even if the welding is performed by a method such as welding, it is difficult to secure the perfect bonding accuracy, causing a lack of strength, especially if the product panel is a vehicle panel, the cause of abnormal vehicle noise during driving. Problems such as

Therefore, the present invention has been invented to solve the problems as described above, the problem to be solved by the present invention, after pressing the upper panel and the lower panel, partially heated in a hot state by high-frequency induction heating, the heating By clinching the parts, the present invention provides a press mold for clinching simultaneous molding which reduces the number of required molds, shortens the processing time, strengthens the bonding force between panels, and ensures the degree of bonding thereof.

Clinching simultaneous molding press mold according to the present invention for realizing the technical problem as described above is the lower mold is mounted on the lower bolster, the blank holder is mounted on the bolster through the cushion pin to the outside of the lower mold, the lower mold In the press forming for panel molding in which the upper mold is mounted on the slider at the upper part of the upper part of the upper part and press-forms the material panel injected between the lower mold part,

Between the upper and lower molding surfaces, hot clinching means for heating and clinching one side of the input material panel in a hot state is characterized in that it comprises a.

The hot clinching means may be mounted on one side of the slider to provide a clinching pressure; A clinching punch mounted to an end of the actuating rod of the pressurizing cylinder and operating downward through one side of the upper surface of the upper die; A clinching steel mounted on one side of the molding surface of the lower mold and configured to form a clinching groove corresponding to the clinching punch on an upper surface thereof; And a heating unit configured to be formed inside the upper surface of the upper surface of the clinching punch and to provide a heating source to the clinching processing portion.

The clinching steel is characterized in that the clinching groove is formed in a circular shape, the material inlet groove is further formed on the inner end surface of the clinching groove.

The heating unit is characterized by consisting of a high frequency induction heater having a high frequency induction coil therein.

As described above, according to the clinching co-molding press mold according to the present invention, the upper panel and the lower panel are press-molded first, and then the two panels are heated in a hot state by partially induction heating through a heating unit. By clinching the heating part, there is an effect of reducing the number of required molds and shortening the processing time.

In addition, by pressing a plurality of panels at the same time, the bonding degree is secured, and at the same time there is an effect that can provide a bonding force due to the clinching process and pressing molding between the panels.

In addition, after the press molding is completed, by processing the clinching processing portion in a hot state, it is possible to improve the formability of the clinching processing portion to prevent the occurrence of cracks, thereby securing a sufficient bonding force.

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

6 is a cross-sectional configuration diagram of a press mold for clinching co-molding according to the present invention, and FIG. 7 is an enlarged cross-sectional view of part A of FIG. 6.

Referring to the overall configuration of the press mold for clinching co-molding according to the present embodiment, as shown in FIG. 6, the lower mold 1 having the lower molding surface 2 of the lower surface shape of the product panel has a lower bolster 3. The blank holder 7 is mounted to the bolster 3 via the cushion pin 5 on the outside of the lower mold 1.

And the upper mold 11 having the upper molding surface 12 of the upper surface shape of the product panel at the upper portion of the lower mold 1 is mounted on the slider 9 of the upper material to be inserted between the lower mold 1 The panel 10 (see FIG. 8) is pressed onto the blank holder 7 to form a product panel 20 (see FIG. 12).

Here, the material panel 10 to be inserted between the upper mold 11 and the lower mold 1 is at least two or more material panels (in this embodiment is applied to the input of two material panels) in a mutually hot state Let the clinching process be done at the same time.

In addition, between the upper molding surface 12 of the upper mold 11 and the lower molding surface 2 of the lower mold 1, the two sheets of material panels 10 to be introduced are simultaneously pressed and heated on one side thereof. A hot clinching means for clinching in a hot state is configured.

In the hot clinching means, as shown in FIG. 7, a pressure cylinder 21 is mounted on the lower portion of the slider 9 to provide a clinching pressing force.

A clinching punch 25 is mounted at the tip of the actuating rod 23 of the pressurizing cylinder 21. The clinching punch 25 penetrates one side of the forming surface 12 of the upper mold 11 so as to operate downwardly. Is installed.

In addition, a clinching steel 27 is mounted on the forming surface 2 of the lower mold 1, and the clinching steel 27 has a clinching groove (corresponding to the clinching punch 25) on an upper end thereof. 29) is formed.

Here, the clinching grooves 29 are formed in a circular shape in the clinching steel 27, and the material inlet grooves 31 are further formed on the inner end surface of the clinching grooves 29 along the outside thereof.

In addition, a heating unit 33 is formed inside the forming surface 12 of the upper mold 11 to the outside of the clinching punch 25, and the heating unit 33 is a clinch processing part on the material panel 10. To provide a heating source.

Here, the heating unit 33 is preferably made of a high frequency induction heater having a high frequency induction coil therein.

That is, in the clinching of the material panel 10 by the clinching punch 25 and the clinching steel 27, two or more panels (plates) are press-molded, and the clinching process is performed by the heating unit. In the hot state where it is locally heated by 33, the pressurizing cylinder 21 is driven so that the clinching punch 25 causes one side of each material panel 10 to clinch the groove 29 of the clinching steel 27. The panel is joined to each other by pushing it into the panel so that a folding part is formed.

Therefore, the operation of the press mold for clinching co-molding having the configuration as described above will be described in each step through FIGS. 8 to 12.

As shown in FIG. 8, first, two material panels composed of an upper panel and a lower panel between the upper mold 11 and the lower mold 1 with the upper mold 11 and the blank holder 7 raised. Input (10).

Subsequently, as shown in FIG. 9, the upper die 11 is lowered by the upper slide 9 so that the die face 19 of the upper die 11 and the die face 15 of the blank holder 7 are lowered. Through the outer end of each material panel 10 is held.

In this state, when the upper die 11 continues to move downward by the upper slide 9, the blank holder 7 starts the lowering operation, as shown in Figure 10, the upper die 11 and As the two material panels 10 held on the die face surfaces 19 and 15 of the blank holder 7 flow inwardly into the respective forming surfaces 12 and 2 of the upper mold 11 and the lower mold 1, It is molded along the shape of the product and is molded into the product panel 20 at the moment when the upper mold 11 is completely integrated with the lower mold 1.

As described above, when the two material panels 10 are press-molded by the upper mold 11 and the lower mold 1, as shown in FIG. 11, the controller C first controls the heating unit 33. Will output a signal.

Then, the heating unit 33 locally heats the clinching processing unit of the material panel 10 by high frequency induction heating to form a hot state, and then the pressure cylinder 21 drives forward.

As the pressurizing cylinder 21 is driven forward, the clinching punch 25 presses one side of the clinch processing portion of the two material panels 10 to form clinching formed on the clinching steel 27 on the lower mold 1. Into the inside of the groove 29, and thus, in the clinching groove 29, an undercut UC is formed so that the two material panels 10 are not separated from each other, so that the material panels 10 The junction is made.

In this case, the clinching processing part is easily broken or cracked due to lack of elongation due to a large amount of material inflow around the clinching molding, but is formed in the hot state by the heating unit 33 to cause breakage or cracking. It becomes possible to suppress it.

As such, when the upper slide 9 is lifted up in the state where the press molding and the clinching molding of the material panel 10 are completed, as shown in FIG. 12, the upper die 11 and the blank holder 7 are lifted at the same time. When the upper slide 9 is completed, the hanger 30 is introduced between the upper mold 11 and the lower mold 1 to take out the product panel 20.

Therefore, as described above, by forming the upper panel and the lower panel in the same press die by pressure forming and clinching, it is possible to secure the bonding strength and the degree of bonding thereof.

1 is a side view of a typical press equipment.

FIG. 2 is a cross-sectional configuration diagram of a prior art panel forming press die taken along the line A-A of FIG.

3 to 5 is a step-by-step operational state diagram of a press mold for panel molding according to the prior art.

6 is a cross-sectional view of a press mold for clinching co-molding according to the present invention.

FIG. 7 is an enlarged cross-sectional view of part A of FIG. 6.

8 to 12 is a step-by-step operational state diagram of the press mold for clinching co-molding according to the present invention.

Claims (4)

delete The lower mold is mounted on the lower bolster, and the blank holder is mounted on the bolster to the outside of the lower mold through a cushion pin. In the press molding for panel molding press-molded, Between the upper and lower molding surfaces, hot clinching means for forming a clinching process by heating one side of the input material panel in a hot state, The hot clinching means may be mounted on one side of the slider to provide a clinching pressure; A clinching punch mounted to an end of the actuating rod of the pressurizing cylinder and operating downward through one side of the upper surface of the upper die; A clinching steel mounted on one side of the molding surface of the lower mold and configured to form a clinching groove corresponding to the clinching punch on an upper surface thereof; A press mold for clinching co-molding, characterized in that the heating unit is provided inside the upper surface of the upper surface of the clinching punch to provide a heating source to the clinching processing portion. 3. The method of claim 2, The clinching steel The clinching groove is formed in a circular shape, and the inner side of the clinching groove, the press mold for clinching co-molding, characterized in that further forming a material inlet groove. 3. The method of claim 2, The heating unit Clinching simultaneous molding press mold, characterized in that made of a high frequency induction heater having a high frequency induction coil therein.

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