CN104174768B - mould structure and drawing method - Google Patents

Abstract

The invention discloses a mold structure and a drawing method. The mold structure comprises: a lower mold base, a first blank holder, a second blank holder, an upper mold base and a binder, the first blank holder and the second blank holder. The two blank holders are respectively movably arranged on the lower mold holder, the height of the highest point of the first blank holder is higher than the height of the highest point of the lower mold holder, and the height of the highest point of the second blank holder is higher than that of the first blank holder The height of the highest point of the piece; the upper mold base is set above the lower mold base; the binder piece is movably arranged on the upper mold base, and the binder piece corresponds to the second blank holder up and down, and the lowest point of the binder piece is The height is lower than the height of the lowest point of the upper die base. According to the mold structure of the present invention, the drawing depth of the sheet material is reduced by setting the first blank holder, the second blank holder, and the blank holders corresponding to the upper and lower sides of the second blank holder, effectively solving the traditional Drawing process sheet is very easy to crack and sheet forming is unstable, which improves the material utilization rate of sheet.

Description

Die structure and drawing method

technical field

The invention relates to the technical field of vehicle manufacturing, in particular to a mold structure and a drawing method.

Background technique

It is pointed out in the related art that due to the uneven depth of the overall shape of the sheet, limited by the general drawing process and structure, the binder surface is generally a relatively gentle curved surface and will not change sharply with the depth of the sheet, eventually resulting in the overall shape of the sheet The molding depth is slightly deeper than the deepest position of the product, so as to achieve the purpose of smooth transition of sheet metal forming depth and uniform feeding.

However, due to the deepening of the local forming depth of the sheet metal, the sheet material is stretched more severely during the forming process, and cracking is very easy to occur, the sheet material forming is unstable, and even the sheet material is scrapped, and the large process supplement here reduces the material utilization rate , The vehicle manufacturing cost increases. In addition, due to factors such as the accuracy of the machine tool, the pressing force of the blank holder ring is unstable.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a mold structure that can reduce the drawing depth of the sheet during the drawing process.

Another object of the present invention is to provide a drawing method using a die structure for drawing.

The mold structure according to the embodiment of the first aspect of the present invention includes: a lower mold base; a first flange holder and a second flange holder, and the first flange holder and the second flange holder are respectively movably arranged. On the lower mold base, the height of the highest point of the first edge holder is higher than the height of the highest point of the lower mold base, and the height of the highest point of the second edge holder is higher than that of the first edge holder. The height of the highest point of a blank holder; the upper mold base, the upper mold base is arranged above the lower mold base; and the binder, the binder is movably arranged on the upper mold base , and the binder part corresponds up and down with the second edge holder, and the height of the lowest point of the binder part is lower than the height of the lowest point of the upper mold base.

According to the mold structure of the embodiment of the present invention, the drawing depth of the sheet is reduced by setting the first blank holder, the second blank holder, and the blank holders corresponding to the upper and lower sides of the second blank holder, effectively solving the problem of The traditional drawing process sheet is very easy to crack and the sheet forming is unstable, which improves the material utilization rate of the sheet.

Specifically, the lower mold base has one of the punch and the die, the upper mold base has the other of the punch and the die, and the first edge holder and the second edge holder Cooperating around the outer edge of the one of the male die and the female die, the binder is disposed adjacent to the outer edge of the other of the male die and the female die.

Optionally, the first edge holder is formed in a ring shape, and the second edge holder is arranged between the first edge holder and the one of the male die and the female die .

Further, at least one limit block is provided on one of the second edge holder and the lower mold base, and at least one limit block is formed on the other of the second edge holder and the lower mold base. A limit slot, the limit block cooperates with the corresponding limit slot so that the second edge holder can move in the up and down direction relative to the lower mold base.

Optionally, at least one limiting block is provided on the second edge holder, at least one limiting groove is formed on the lower mold base and extends along the up and down direction, and the limiting block corresponds to It can move up and down in the said limiting slot.

Optionally, there are multiple limiting blocks and the multiple limiting blocks are distributed at intervals, and there are multiple limiting slots and the multiple limiting grooves are distributed at intervals.

Optionally, the second edge holder is movably arranged on the lower mold base through a first nitrogen gas spring, and the pressing material is movably arranged on the upper mold base through a second nitrogen gas spring.

Optionally, the first edge holder is movably arranged on the lower mold base through an air cushion.

According to the drawing method of the second aspect embodiment of the present invention, the mold structure includes a lower mold base, a first flange holder and a second flange holder movably arranged on the lower mold base, The upper mold base arranged above the lower mold base, and the binder piece movably arranged on the upper mold base, the height of the highest point of the first edge holder is higher than that of the lower mold base The height of the highest point, the height of the highest point of the second binder is higher than the height of the highest point of the first binder, and the binder corresponds to the second binder up and down, so The height of the lowest point of the binder is lower than the height of the lowest point of the upper die base, the lower die base has a punch, the upper die base has a concave die, and the drawing method includes the following steps: S1 , placing the sheet material on the lower mold base; S2, the upper mold base and the binder move downward together; S3, the binder and the second edge holder, and the After the upper mold base and the first edge holder simultaneously clamp the sheet, the binder pushes down the second edge holder to move downward relative to the lower mold base, and the The upper die base pushes down the first edge holder to move downward relative to the lower die base; S4, the upper die base continues to move downward after the second edge holder moves downward to the limit position, The pressing member moves upward relative to the upper mold base; S5, the sheet material starts to form after the sheet material contacts the punch of the lower mold base, until the punch and the concave die The mold reaches the closed state and the molding is completed.

Specifically, the first edge holder and the second edge holder jointly surround the outer edge of the one of the male die and the female die, and the binder member is adjacent to the male die and the female die. The outer edge of the other of the dies is provided.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is the assembly diagram of the lower mold holder, the first blank holder and the second blank holder of the mold structure according to the embodiment of the present invention;

Fig. 2 is a perspective view of the lower mold base shown in Fig. 1;

Fig. 3 is a perspective view of the first edge holder shown in Fig. 1;

Fig. 4 is a perspective view of the second edge holder shown in Fig. 1;

Fig. 5 is an assembly drawing of the upper mold base and the binder part of the mold structure according to an embodiment of the present invention;

FIG. 6 is a perspective view of the binder shown in FIG. 5 .

Reference signs:

1: Lower die base; 11: Punch; 12: Guide sliding surface;

2: first blank holder; 3: second blank holder; 31: guide plate;

4: Upper mold base; 41: Die; 5: Binder.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", " Orientation indicated by Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Axial, Radial, Circumferential, etc. Or the positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation , and therefore cannot be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The mold structure according to the embodiment of the present invention will be described below with reference to FIGS. 1-6 .

As shown in Figure 1 and Figure 5, the mold structure according to the embodiment of the first aspect of the present invention includes a lower mold base 1, a first blank holder 2, a second blank holder 3, an upper mold base 4 and a binder 5 .

Specifically, the mold structure is suitable for installation on the machine tool, wherein the lower mold base 1 is installed on the lower table of the machine tool, the upper mold base 4 is connected with the upper table of the machine tool, and the upper mold base 4 corresponds to the lower mold base 1 up and down. The upper mold base 4 is arranged above the lower mold base 1 , that is to say, the upper mold base 4 and the lower mold base 1 are spaced apart from each other by a certain distance in the vertical direction. It should be noted that the structure and operation of the machine tool are well known to those skilled in the art, and will not be repeated here.

During the forming process, the upper mold base 4 moves down together with the slider on the bed, and when the upper mold base 4 moves down to reach the closed state with the lower mold base 1, the sheet placed on the lower mold base 1 can be processed into a predetermined shape .

The lower die base 1 has one of the punch 11 and the die 41, the upper die base 4 has the other one of the punch 11 and the die 41, the punch 11 is compatible with the die 41, and the punch 11 is compatible with the die 41. After the die 41 is closed, the blank can be pressed into a predetermined shape. In other words, the lower die base 1 has a punch 11, and the upper die base 4 has a die 41, as shown in Figures 1 and 5; or, the lower die base 1 has a die 41, and the upper die base 4 has a punch 11 (not shown). It can be understood that the specific arrangement positions of the male die 11 and the female die 41 can be arranged according to actual requirements, which is not specifically limited in the present invention.

The first edge holder 2 and the second edge holder 3 are respectively movably arranged on the lower mold base 1. In other words, the first edge holder 2 is arranged on the lower mold base 1 and can move up and down relative to the lower mold base 1. The second edge holder 3 is arranged on the lower mold base 1 and can also move up and down relative to the lower mold base 1, and the movement of the first edge holder 2 and the second edge holder 3 does not interfere with each other.

Both the first edge holder 2 and the second edge holder 3 are arranged adjacent to the punch 11 or the die 41 on the lower mold base 1, and the first edge holder 2 and the second edge holder 3 jointly surround the above-mentioned punch 11 Or the outer edge of the die 41. For example, in the example shown in Fig. 1-Fig. 4, the upper end surface of the lower mold base 1 is provided with a punch 11, and the first edge holder 2 and the second edge holder 3 are all arranged on the upper end surface of the lower mold base 1 and surround the The outer periphery of the punch 11 is used to prevent the edge of the blank from becoming unstable and wrinkled during the drawing process.

The height of the highest point of the first edge holder 2 is higher than the height of the highest point of the lower mold base 1 , and the height of the highest point of the second edge holder 3 is higher than the height of the highest point of the first edge holder 2 . In this way, when the upper mold base 4 moves downward, it will first contact the second edge holder 3 , then the first edge holder 2 , and finally the lower mold base 1 .

The pressing part 5 is movably arranged on the upper die base 4 , that is, the pressing part 5 is arranged on the upper die base 4 , and the pressing part 5 can move up and down relative to the upper die base 4 . The binder 5 corresponds up and down to the second edge holder 3, and the height of the lowest point of the binder 5 is lower than the height of the lowest point of the upper mold base 4, so that when the lower mold base 1 moves downward, the upper mold The binder 5 on the base 4 will first contact the second blank holder 3 on the lower mold base 1, thereby effectively reducing the drawing depth of the sheet, improving the stability of the sheet forming, and reducing the cracking of the sheet Risk, improve the utilization of materials.

The pressing material 5 is arranged adjacent to the outer edge of the punch 11 or the die 41 on the upper die base 4 . For example, in the examples shown in FIG. 5 and FIG. 6 , a die 41 is provided on the lower end surface of the lower die base 1 , and the pressing member 5 is disposed on the lower end face of the lower die base 1 and adjacent to the outer periphery of the die base 41 .

Wherein, the first edge holder 2 , the second edge holder 3 and the binder member 5 are respectively movable within a certain stroke range, and the specific stroke range can be specifically designed according to actual requirements, which is not specifically limited in the present invention.

Before the sheet material is drawn, the lower die base 1 with the punch 11, the first edge holder 2 and the second flange holder 3 are assembled in place to form the lower die base assembly, and the die base with the die 41 is assembled The upper die base 4 and the pressing part 5 are assembled in place to form the upper die base assembly, and then the lower die base assembly is installed on the lower table of the machine tool, and the upper die base assembly is installed on the upper table of the machine tool.

When drawing, first place the sheet on the lower mold base assembly, start the machine tool, the lower mold base assembly is fixed relative to the lower table of the machine tool, and the upper mold base assembly moves downward. During the process, part of the blank is clamped by the binder part 5 of the upper die base assembly and the second blank holder 3 of the lower die base assembly. By adjusting the machine tool and mold structure, the upper die base 4 and the first The blank holder 2 is arranged to clamp the sheet roughly simultaneously with the binder 5 and the second blank 3, thereby driving the sheet to move downward together. Specifically, the binder 5 will push the second press downward. The edge piece 3 moves downward relative to the lower mold base 1 (at this time, the binder piece 5 is roughly stationary relative to the upper mold base 4), and the upper mold base 4 pushes the first edge holder 2 downward relative to the lower mold base. Seat 1 moves downward, when the second edge holder 3 moves down to the extreme position (that is, after the second edge holder 3 moves to this position, the binder 5 stops moving to move down, so that the second blank holder 3 cannot continue to move downward relative to the lower die base 1), since the upper die base assembly continues to move downward relative to the lower die base assembly, the binder 5 will move relative to the upper die base The seat 4 moves upward, and when the pressing part 5 moves to its upper limit position (that is, when the pressing part 5 moves to this position, it cannot continue to move upward relative to the upper die seat 4), the concave groove on the upper die seat 4 Die 41 goes down to contact with the punch 11 on the lower mold base 1 with sheet material, and sheet material begins to form this moment, until punch 11 and die 41 close molds completely, and molding is finished.

Here, it should be noted that the specific setting position of the second blank holder 3 on the upper die base 4 can be adaptively changed according to the actual processing of the sheet metal, and the second blank holder 3 is preferably placed on the sheet drawing Deeper position, in order to achieve the purpose of reducing the local forming depth of the sheet.

Furthermore, when there are multiple places where the drawing depth of the sheet is relatively deep, a plurality of second edge holders 3 can be arranged on the lower mold base 1 to reduce the drawing depth and improve the stability and stability of the sheet forming. material utilization rate.

Thus, according to the mold structure of the embodiment of the present invention, by setting the first edge holder 2 and the second edge holder 3, and the binder member 5 corresponding to the second edge holder 3 up and down, the tension of the sheet material is reduced. The drawing depth effectively solves the problem that the traditional drawing process sheet is extremely easy to crack and the sheet forming is unstable, and improves the material utilization rate of the sheet. When the above mold structure is applied to a vehicle, the manufacturing cost of the whole vehicle can be reduced.

According to an embodiment of the present invention, the first edge holder 2 is formed in a ring shape, and the second edge holder 3 is arranged between the first edge holder 2 and one of the above-mentioned one of the male die 11 and the female die 41 . Referring to Fig. 1 and in conjunction with Fig. 2-Fig. 4, the first edge holder 2 is arranged around the punch 11 on the lower mold base 1, and the rear side edge of the punch 11 and the first edge holder 2 define a suitable A space is prevented for the second clamping part 3 so that the first clamping part 2 and the second clamping part 3 surround the outer circumference of the punch 11 together. It can be understood that the specific shapes and positions of the punch 11 , the first edge holder 2 and the second edge holder 3 can be adaptively changed according to different sheets to be processed, which is not specifically limited in the present invention.

As shown in Figures 2 and 4, at least one guide plate 31 is provided on one of the second edge holder 3 and the lower mold base 1, and a guide plate 31 is formed on the other of the second edge holder 3 and the lower mold base 1. At least one slide guide surface 12, that is to say, the guide plate 31 can be arranged on the second edge holder 3 or on the lower mold base 1, and similarly, the slide guide surface 12 can be formed on the second edge holder 3 , can also be formed on the lower mold base 1, but when the guide plate 31 is set on the second edge holder 3, the corresponding guide sliding surface 12 can only be formed on the lower mold base 1, similarly, when the guide plate 31 is set on the lower mold base 1, the corresponding guide surface 12 can only be formed on the second edge holder 3. The guide plate 31 cooperates with the corresponding sliding guide surface 12 so that the second edge holder 3 can move up and down relative to the lower mold base 1 .

Thus, through the cooperation of the guide plate 31 and the sliding guide surface 12, the movement of the second edge holder 3 in the horizontal direction relative to the lower mold base 1 can be well limited, and the second edge holder 3 can move relative to the lower mold base. 1 is generally movable only in the up and down direction, thus effectively ensuring the stability of the up and down movement of the second edge holder 3 .

According to a specific embodiment of the present invention, at least one guide plate 31 is arranged on the second edge holder 3, at least one guide slide surface 12 is formed on the lower mold base 1 and extends along the up and down direction, and the guide plate 31 is on the corresponding slide guide surface 12 Can move up and down. Optionally, there are a plurality of guide plates 31 and the plurality of guide plates 31 are distributed at intervals, and there are multiple guide surfaces 12 and the plurality of guide surfaces 12 are distributed at intervals.

Referring to Fig. 2 and Fig. 4, a plurality of guide plates 31 spaced and distributed along its circumferential direction are provided on the outer peripheral wall of the second edge holder 3. Correspondingly, the rear side of the punch 11 has a groove, and the second edge holder 3 is adapted to be accommodated in the groove, and a plurality of sliding guide surfaces 12 are formed on the inner peripheral wall of the groove at intervals along its circumferential direction, and the plurality of guide plates 31 correspond to the plurality of sliding guide surfaces 12 one by one. During installation, the plurality of guide plates 31 on the second edge holder 3 can be aligned with the plurality of sliding guide surfaces 12 in the groove, and then the second edge holder 3 is put downward into the groove, which is convenient for assembly.

At the same time, between the first edge holder 2 and the punch 11 , and between the binder 5 and the die 41 can also be assembled by using the sliding guide surface 12 and the guide plate 31 . As shown in Figure 2 and Figure 3, the outer peripheral wall of the punch 11 is provided with a plurality of guide plates 31 spaced apart along its circumferential direction, and the inner peripheral wall of the first edge holder 2 is formed with guide plates 31 spaced apart along its circumferential direction. The plurality of guide surfaces 12, the plurality of guide plates 31 correspond to the plurality of guide surfaces 12 one by one. As shown in Figures 5 and 6, the outer peripheral wall of the binder 5 is provided with a plurality of guide plates 31 spaced along its circumferential direction, the rear side of the die 41 has a groove (not shown), the binder The component 5 is adapted to be accommodated in the groove, and a plurality of sliding guide surfaces 12 cooperating with a plurality of guide plates 31 are formed on the inner peripheral wall of the groove.

Therefore, the binder surface of the front and rear sides of the sheet considers the shape of the binder surface separately, and the shallowest binder surface shall prevail. Smooth transition.

Wherein, the second blank holder 3 is movably arranged on the lower mold base 1 through the first nitrogen spring, and the binder 5 is movably arranged on the upper mold base 4 through the second nitrogen spring, that is to say, the second press The side piece 3 uses the first nitrogen spring to provide the pressing force, and the pressing piece 5 provides the pressing force through the second nitrogen spring. The first blank holder 2 is movably arranged on the lower mold base 1 through an air cushion. In other words, the material-binder force required by the first blank holder 2 is provided by the air cushion in the lower table of the machine tool.

In addition, it should be noted that the first edge holder 2 and the second edge holder 3 can be respectively connected to the lower mold base 1 through threaded fasteners, and the corresponding threaded fasteners can define the first edge holder 2 and the second edge holder respectively. At the limit position of the upward movement of the second blank holder 3 , the binder 5 can also be connected to the upper mold base 4 through threaded fasteners, and the corresponding threaded fasteners can limit the limit position of the downward movement of the binder 5 . Wherein, the threaded fastener can be a screw or a bolt.

According to the second embodiment of the present invention, a drawing method using a mold structure for drawing, wherein the mold structure includes: a lower mold base 1, a first edge holder 2 and a second edge holder movably arranged on the lower mold base 1 The edge holder 3 , the upper mold base 4 arranged above the lower mold base 1 , and the binder part 5 movably arranged on the upper mold base 4 .

Specifically, as shown in Figures 1-6, the height of the highest point of the first blank holder 2 is higher than the height of the highest point of the lower mold base 1, and the height of the highest point of the second blank holder 3 is higher than that of the first blank holder 3. The height of the highest point of a binder 2, the binder 5 corresponds up and down with the second binder 3, and the height of the lowest point of the binder 5 is lower than the height of the lowest point of the upper mold base 4. The lower mold base 1 has a punch 11 , and the upper mold base 4 has a concave mold 41 .

Wherein, the drawing method comprises the following steps:

S1, place the sheet material on the lower mold base 1;

S2, the upper mold base 4 and the pressing part 5 move downward together;

S3. After the binder 5 and the second binder 3, and the upper mold base 4 and the first binder 2 clamp the sheet material at the same time, the binder 5 pushes the second binder 3 downward relative to the lower The mold base 1 moves downward, and the upper mold base 4 pushes the first edge holder 2 downward relative to the lower mold base 1;

S4. After the second blank holder 3 moves downward to the limit position, the upper mold base 4 continues to move downward, and the binder 5 moves upward relative to the upper mold base 4; and

S5. After the sheet material is in contact with the punch 11 of the lower mold base 1, the sheet material starts to form until the punch 11 and the die 41 reach a closed state and the forming is completed.

During the forming process, the sheet material is first placed on the lower mold base assembly, and the machine tool is started. The lower mold base assembly is fixed relative to the lower table of the machine tool, and the upper mold base assembly moves downward. During the process, part of the blank is clamped by the binder part 5 of the upper die base assembly and the second blank holder 3 of the lower die base assembly. By adjusting the machine tool and mold structure, the upper die base 4 and the first The blank holder 2 is arranged to clamp the sheet roughly simultaneously with the binder 5 and the second blank 3, thereby driving the sheet to move downward together. Specifically, the binder 5 will push the second press downward. The edge piece 3 moves downward relative to the lower mold base 1 (at this time, the binder piece 5 is roughly stationary relative to the upper mold base 4), and the upper mold base 4 pushes the first edge holder 2 downward relative to the lower mold base. Seat 1 moves downward, when the second edge holder 3 moves down to the extreme position (that is, after the second edge holder 3 moves to this position, the binder 5 stops moving to move down, so that the second blank holder 3 cannot continue to move downward relative to the lower die base 1), since the upper die base assembly continues to move downward relative to the lower die base assembly, the binder 5 will move relative to the upper die base The seat 4 moves upward, and when the pressing part 5 moves to its upper limit position (that is, when the pressing part 5 moves to this position, it cannot continue to move upward relative to the upper die seat 4), the concave groove on the upper die seat 4 Die 41 goes down to contact with the punch 11 on the lower mold base 1 with sheet material, and sheet material begins to form this moment, until punch 11 and die 41 close molds completely, and molding is finished. Wherein, the specific structure of the mold structure and the like have been specifically described in the mold structure of the embodiment of the first aspect of the present invention, and will not be repeated here.

The drawing method using the die structure for drawing according to the embodiment of the present invention can effectively reduce the drawing depth of the sheet, improve the stability of sheet forming, reduce the risk of sheet cracking, and improve the utilization rate of the material.

According to a specific embodiment of the present invention, the first edge holder 2 and the second edge holder 3 jointly surround the outer edge of one of the punch 11 and the die 41, and the binder 5 is adjacent to the punch 11 and the die The outer edge of another of 41 is set. Referring to Fig. 1 and in conjunction with Fig. 2-Fig. 6, a punch 11 is provided on the upper end surface of the lower die base 1, the first edge holder 2 is arranged around the punch 11 on the lower die base 1, and the rear side of the punch 11 A space suitable for preventing the second edge holder 3 is defined between the edge and the first edge holder 2 , so that the first edge holder 2 and the second edge holder 3 jointly surround the outer periphery of the punch 11 . A concave mold 41 is provided on the lower end surface of the lower mold base 1, and a groove is formed on the rear side of the convex mold 11, and the second edge holder 3 is adapted to be accommodated in the groove.

According to the mold structure of the embodiment of the present invention and the drawing method using the mold structure for drawing, the structure of the mold is optimized, which solves the problems that the sheet metal is very easy to crack and the formability of the sheet material is unstable in the traditional drawing process, and improves The material utilization rate of the sheet is improved.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" is intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (8)

1. adopt mould structure to carry out a drawing method for drawing, it is characterized in that, described mould structure comprise die shoe,Be located at movably the first flanging part and the second flanging part on die shoe, be located at the top of described die shoe upper bolster,And being located at movably the binder part on described upper bolster, the height of the peak of described the first flanging part is higher than under describedThe height of the peak of die holder, the height of the peak of described the second flanging part is higher than the peak of described the first flanging partHighly, described binder part is corresponding up and down with described the second flanging part, and the height of the minimum point of described binder part is lower than on describedThe height of the minimum point of die holder, described die shoe has punch, and described upper bolster has die, and described drawing method comprisesFollowing steps:

S1, plate is placed on described die shoe;

S2, described upper bolster move down together with described binder part;

S3, described binder part and described the second flanging part and described upper bolster and described the first flanging part are simultaneously by described plateAfter material steps up, described binder part promotes described the second flanging part downwards and moves down with respect to described die shoe, and on describedDie holder promotes described the first flanging part downwards and moves down with respect to described die shoe;

S4, described the second flanging part move downward to described upper bolster after extreme position and continue to move down, described binder partMove up with respect to described upper bolster;

S5, described plate contact with the described punch of described die shoe after described plate start moulding, until described punch withDescribed die reaches closure state moulding to be completed.

2. the drawing method that employing mould structure according to claim 1 carries out drawing, is characterized in that, describedOne flanging part and described the second flanging part are jointly around the outward flange of described punch, outside the contiguous described die of described binder partEdge arranges.

3. the drawing method that employing mould structure according to claim 2 carries out drawing, is characterized in that, describedOne flanging part is formed as annular shape, and described the second flanging part is located between described punch and described the first flanging part.

4. the drawing method that carries out drawing according to the employing mould structure described in any one in claim 1-3, its feature existsIn, one of them in described the second flanging part and described die shoe is provided with at least one limited block, described the second flangingOn another in part and described die shoe, be formed with at least one stopper slot, described limited block and corresponding described stopper slotCoordinate so that described the second flanging part is removable on above-below direction with respect to described die shoe.

5. the drawing method that employing mould structure according to claim 4 carries out drawing, is characterized in that, at least oneIndividual described limited block is located on described the second flanging part, and described at least one, stopper slot is formed on described die shoe and along upperLower direction is extended, and described limited block can move up and down in the described stopper slot of correspondence.

6. the drawing method that employing mould structure according to claim 4 carries out drawing, is characterized in that, described limitPosition piece is the spaced apart distributions of multiple and described multiple limited blocks, and described stopper slot is that multiple and described multiple stopper slots are spaced apartDistribute.

7. the drawing method that employing mould structure according to claim 1 carries out drawing, is characterized in that, describedTwo flanging parts are located on described die shoe movably by the first nitrogen spring, and described binder part is by the second nitrogen springBe located at movably on described upper bolster.

8. the drawing method that employing mould structure according to claim 1 carries out drawing, is characterized in that, describedOne flanging part is located on described die shoe movably by air cushion.