KR20100075071A - Stamping forming method of high tensile metal plate - Google Patents

Abstract

PURPOSE: A stamping molding method for a high tensile metal plate is provided to reduce the molding pressure exerted on a stamping mold and prevent hardening of a molded high tensile metal plate. CONSTITUTION: A stamping molding method for a high tensile metal plate is as follows. A blank holder(34) and a punch(32) are positioned on the same plane as the set height. A high tensile metal plate is positioned on the top of the blank holder and the punch. The punch is driven for stamping of a first height so as to gradually deform the high tensile metal plate, and then for stamping of a second height so as to the high tensile metal plate is deformed continuously. Then, stamping of a third height is performed so that the punch forms a stepped portion on an edge of the high tensile metal plate.

Description

Stamping forming method of high tensile metal plate

The present invention relates to a method for stamping forming a high tension metal sheet, and in particular, by forming two stepped sections of the punching and blank holder pressing portions of the stamping facility, the stepped section can avoid the bounce action after forming the high tensile metal sheet. Refers to a stamping molding method.

Metals have very good strength and moderate bending and toughness, so they are commonly used in structures requiring strength. When the force applied to a unit area exceeds its tensile strength, the metal is a fragile material such as porcelain or brick. It is not cut off immediately, but transformation occurs. In other words, metal has plasticity, which is usually called plastic deformation. In order to produce plastic deformation in metal, mold must be made of steel of higher strength, and usually the work order is to make upper and lower molds of the shape to be formed into steel, and then open upper and lower molds and insert materials. Is fixed to a facility called a press, and the press gives the force necessary for molding to lead the mold to open and close up and down. Closing allows the material to be molded, and opening allows the raw material to move in and out. Presses, molds, and raw materials form a set of stamping forming systems. I can't help it.

Reference is made to that shown in FIG. 1. This is a commonly known sequence and mold design of high tension metal sheet forming. Among them, the high tension metal plate 10 is positioned between the upper mold 20 and the lower mold punch 22, and the high tension metal plate 10 is fixed by the blank holder 24 in the process of stamping the lower mold punch 22. However, in the stamping process, the sheet material and the internal stress of the high tensile metal plate 10 affect the resistance of the stamping, so that the tail end 12 of the high tensile metal plate 10 is easily easily rebounded or bent at all times. It has a serious impact on the quality of the result is shown in FIG.

In addition, because the tail of the metal plate is lifted or bent, the angle and shape required by the specification cannot be completed at once after stamping. Commonly known processes combine post-production work as follows. There are four manufacturing processes: (1) molding, (2) cutting the sides, (3) shaping, and (4) shaping. Or there are five manufacturing processes: (1) material loading, (2) molding, (3) secondary molding, (4) shaping, and (5) shaping. The two production methods described above are tedious and slow. The most influential part is to leave pressure patterns, scratches and crushed marks on the surface after the metal sheet material has undergone various processing procedures, and must be reworked to restore the smooth surface by reworking the product quality. do.

As an example, to avoid rebounds and to increase the accuracy of the molded part, molding a typical angle generally requires a mold and several stamping bends, such as the above-mentioned "molding" and "molding," In order to adjust the product to the standard bent form, it has to go through several molding processing and shaping control, and the stamping time, transportation process, and opening / closing operation of the mold are very complicated to consume manpower, labor type and power. In addition, a number of "molding" and "molding" stamping molding operations not only have high working hours, but also reduce the service life of the mold.

The main object of the present invention is to create a stepped structure on the edge of the molded product is to be bent to avoid high pressure metal plate enough to rebound in the high tension metal sheet forming process.

Another object of the present invention is to reduce the molding process of the high tension metal sheet. Using stamping equipment, the molding process can be reduced to (1) molding, (2) cutting edge, and (3) shaping to reduce manpower and working hours, lower power consumption, open mold, and reduce the cost of stamping molding in large quantities. It is advantageous to the processing procedure because it does not scratch, harden and harden the molded product and improve the quality of the molded product.

The high tension metal sheet stamping facility of the present invention includes a punch, a corresponding die (DIE) and a blank holder, wherein two sides of the portion pressed by the punch and the blank holder form a stepped zone, the stepped zone being a high tension metal sheet. Bends are installed against the intended edges, and a high tensile metal plate with a predetermined area is placed on the punch and the blank holder of the stamping equipment. Can be formed to avoid rebound after high tension metal sheet molding.

The present invention using the stamping facility described above has the following stamping order. The blank holder and the punch are positioned on the same plane of a predetermined height, the high tensile metal plate is placed on the punch and the blank holder, and the stamping process of the first step is performed. The first stage stamping process drives the punch with the drive mechanism to rise to the first interval so that the high tensile metal plate is gradually deformed. At the same time the deformable part changes in two side steps of the punch and blank holder pressing part. The second stage stamping process causes the punch to be raised to the second interval by the drive mechanism again, causing the high tensile metal plate to continue to deform. The third step stamping process causes the punch to be raised to the third interval by the drive mechanism, thereby allowing steaming to proceed to the end.

The high-strength metal plate is pressed enough to plastic deformation by forming a step at the tail end of the high-strength metal plate in the forming process by installing the stamping process and the step zone divided into steps.The molding process requires only three steps: forming, cutting the edge, and shaping. Shall be.

The present invention further makes the stamping facility of the present invention more elastic by installing an adjustment mechanism at the side end of the die DIE to adjust the stepped area between the punch and the blank holder.

The present invention is designed to avoid the rebound of the edge side of the high-strength metal plate by designing a step area in the mold of the edge of the molded product scheduled to be bent to be a separation line separating the punch and the blank holder so that the high-strength metal plate is sufficiently pressed in the molding process. Afterwards, defects that had to go through a number of shaping were solved.

When the molding process produces the product through the same stamping, the present invention can omit one or two process procedures than the prior art, thereby reducing work type and number of workers, thereby increasing production efficiency and reducing costs. It can be lowered, which lowers the probability of forming scratched molded products. In addition, the high-strength metal sheet molded product of the present invention does not occur hardening and at the same time can lower the molding pressure applied to the stamping mold to reduce the manpower, work type, reduce the consumption of energy, power and further increase the service life of the mold.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described combining with drawing. The examples described below are intended to clarify the invention and do not limit the scope of the invention. Since the present invention can be changed and polished by those skilled in the art, the scope of the present invention should be based on the claims.

The high-strength metal sheet described in the present invention, for example, can be referred to as a high-strength steel sheet processed with steel, but is gradually becoming a major player in automobile materials because of its high performance and reduced weight. For example, it is used for body frames, frames and bumper bars. The increase in strength is the addition of trace alloy elements, for example Nb, Cu, V, Ti and the like. Naturally, special processing and heat treatment techniques are also necessary to achieve the desired characteristics. The range of high tensile metal properties is very wide and not limited thereto.

Referring to FIG. 3, the stamping facility of the present invention includes a punch 32, a die (DIE) 30 and a blank holder 34, which also includes a die (DIE) 30. The concave mold is called. Among them, the die 30 or the punch 32 may be normally driven up and down by the drive mechanism 40, and may be set to receive control commands in addition to setting regularity and divide the steps. Operate. The punch 32 corresponds to the die 30, and the form in which the die 30 and the punch 32 are combined is typically a mold having a recessed portion. As in the embodiment, the punch 32 and the die 30 are molds in which "convex" and "concave" correspond to each other, but are not limited to the shape thereof. The blank holder 34 provides a suitable force, and the high tension metal plate (plate) 10 is fixed while the relativity movement is performed in the punch 32 and the die 30, and the high tension metal plate 10 is the blank holder when processing. It is also sandwiched between the 34 and the die 30. The punch 32 then moves toward the high tension metal plate 10 and enters the die 30.

It is a feature of the present invention that the two sides of the outer end side of the punch 32 and the portion 34a pressed by the blank holder 34 form a stepped zone S with a high and low position difference.

The stepped section (S) is provided against the edge of the tail end 12 (or deformed) where the bending of the high tension metal plate 10 is scheduled, and the specific spacing is about at the tail end 12 where the bending is scheduled. 5 to 20 mm (adjustable value). A step 14 is formed at the edge of the tail end 12 of the high-strength metal plate 10, and the step zone S becomes a separation line C between the punch 32 and the blank holder 34.

In this embodiment, a blank block 34 in the form of a block is shown on both left and right sides of the drawing, and a high tensile metal plate 10 having a predetermined area is placed on the punch 32 and the blank holder 34 of a stamping facility. In the forming process of the high-tensile metal plate 10, the high-strength metal plate 10 is subjected to the sliding action between the blank holder 34 and the die 30, and the high-tension metal plate 10 is formed by the step 14 formed by being sufficiently pressed by the stepped zone S. You can avoid the tip rebound.

With continued reference to those shown in Figures 4 through 6, many elements in the present invention are not considered as a series of process procedures of the stamping facility of the present invention. For example, the frictional relationship between the blank holder 34 and the die 30 or the punch 32, the force for pressing the material of the blank holder 34, and the like. First of all, the punch 32 must be connected to a drive mechanism, which is generally a hydraulic. It is already described in Figure 3 to lead the punch to move up and down.

The stamping procedure begins in FIG. 4 where the blank holder 34 is at a predetermined height and the high tensile metal plate 10 is placed on the punch. In the starting phase the punch 32 and the blank holder 34 lie on the same plane (see FIG. 3).

When entering the first stage stamping as shown in FIG. 5, the blank holder 34 or the pressing portion 34a provides an appropriate pressing force so that the high tension metal plate 10 can perform the relative motion in the punch 32 and the die 30. Can be fixed and hold when, the drive mechanism 40 drives the punch 32 to rise to the first interval to cause the high tension metal plate 10 to exhibit a rough deformation. The deformation of this part depends on the punch 32 gradually entering the die 30 and also changes like the step zone S of the blank holder 34.

As shown in FIG. 6, when the second stage stamping is entered, the driving mechanism 40 drives the punch 32 to rise to the second interval so that the high tension metal plate 10 continues to be deformed. The high-strength metal plate 10 is gradually attached to the edge portion of the die 30 in accordance with the support of the punch 32 and the stepped zone S is gradually formed.

FIG. 7 is a molding view, when the third stage stamping enters, the driving mechanism 40 drives the punch 32 to ascend to the third interval, and the third stage stamping causes the punch 32 to be stamped to the end to provide a high tensile metal plate ( 10) and the tail end 12 of the high-strength metal plate 10 has a stepped structure due to a mold structure having a step area S of two sides where the punch 32 and the blank holder 34 press. 14).

This can be understood as follows. Through the stamping process divided into steps and the design of the mold structure (installation of step zone), the high tension metal plate 10 is sufficiently pressed in the molding process so that the high tension metal plate is plastically deformed, and the step 14 is formed after the product is molded. By suppressing (removing) the rebounding force at the tail end edge, the molded part can be completed only by cutting and shaping.

Incidentally, the above-mentioned punch 32 is raised to the first interval, the second interval, and the third interval to determine the category in combination with that shown in the drawing, and the driving mechanism 40 drives the punch 32 to rise. It is particularly mentioned that it is a continuous repetitive motion that does not divide steps as being linearly continuous.

Reference is made to Figure 8 for the implementation of the changes in the invention. Furthermore, the die 30 is provided with an adjustment mechanism 36 on at least one end, and should be composed of at least one rotation control lead screw 362 and an adjustable support body 364, and this adjustment mechanism 36 Should be able to adjust the mold step zone S between the punch 32 and the blank holder 34. For example, if the edge required to form the step of the original high tensile metal plate is 10 mm, the lead screw 362 can be adjusted to enter or exit by rotating the support body 364 when the specification needs to be changed according to demand. Draw in or out to move in parallel at a predetermined distance (as shown by the arrow). The gap is the amount of increase and decrease of the adjustment mechanism 36 and further changes the relative depth of the mold step zone S of the punch 32 and the blank holder 34. Therefore, the adjusting mechanism 36 may be combined with the degree of thickness (thick and thin), the bending angle requirements, or the properties of the metal plate to adjust the pressure within the tolerance range to achieve the optimum molding efficacy.

1 is a conventional high-strength metal sheet forming mold installation.

Figure 2 is a high-strength sheet metal molding molded by a conventional casting facility.

3 is an explanatory diagram of a stamping facility of the present invention.

4 to 6 are a series of stamping process diagrams of the stamping equipment of the present invention.

7 is a stamped high tension metal sheet forming view of the present invention.

8 is an explanatory diagram incorporating an adjustment mechanism in the stamping facility of the present invention.

DESCRIPTION OF REFERENCE NUMERALS

10 high tension metal plate 12 tail end

14: step 20: the upper mold

22: mold punch below 24: blank holder

30: Die 32: Punch

34: blank holder 34a: pressing portion

36: adjusting mechanism 362: lead screw

364: support 40: drive mechanism

S: stepped area C: dividing line

Claims (2)

Using a stamping facility comprising a punch, a die and a blank holder corresponding to the punch, and forming a stepped zone with two sides of the outer end side of the punch and a portion pressed by the blank holder with a high and low position difference. a) placing the blank holder and the punch on the same plane of a predetermined height, and placing the high tensile metal plate on the punch and the blank holder; b) a first step stamping process of driving the punches to perform stamping to rise to the first interval so that the high tensile metal plate is gradually deformed; c) a second step stamping process of driving the punch to perform stamping to rise to the second interval so that the high tensile metal plate continues to deform; And d) stamping molding of high tension metal plate, including a third step stamping process of driving a punch and stamping to rise to the third interval to stamp until the deformation of the high strength metal plate is completed, so that a step is formed at the edge of the high strength metal plate; Way. The method according to claim 1, b) a first step stamping process of driving the punches and performing stamping to rise to the first interval so that the high tensile metal plate is gradually deformed; c) a second step stamping process of driving the punches to carry out stamping to rise to the second interval so that the high tensile metal plate continues to deform; d) The third step stamping process of driving the punch to go up to the third interval stamping until the deformation of the high-strength metal plate is completed to form a step on the edge of the high-strength metal plate is characterized in that it is carried out continuously Stamping forming method of high tensile metal plate.

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