CN102179453A - Flexible side drawing device for forming panel veneer - Google Patents

Abstract

The invention discloses a flexible side drawing device for forming panel veneer, relates to plastic processing equipment for forming a curved surface of a plate like piece, and belongs to the field of mechanical engineering. The device mainly comprises a plurality of material clamping mechanisms (1), a plurality of material drawing mechanisms (2) and a supporting frame (3); and the plurality of the material clamping mechanisms (1) clamp the periphery of plate veneer (4) to be processed and the plurality of the material drawing mechanisms (2) apply side drawing force in different directions of the plate veneer (4). The device can be matched with various stamping dies with different sizes and shapes, so that the design and manufacturing cost of the module for forming the plate like part are saved, and disadvantages of corrugation, pull cracks and the like caused when the plate like part is formed are inhibited.

Description

Flexible edge pulling device for sheet metal forming

technical field

The invention discloses a flexible edge pulling device for sheet metal forming, relates to plastic processing equipment for forming curved surfaces of sheet metal parts, and belongs to the field of mechanical engineering.

Background technique

Sheet metal forming is one of the important manufacturing techniques in modern industry. As the shape of stamping parts becomes more and more complex, in order to improve the forming performance of parts and eliminate defects such as wrinkling and cracking of parts during the sheet metal surface forming process, a blank holder is usually installed in the sheet metal surface forming mold. The design of blank-holding device and the control of blank-holding force are important contents of die design for sheet metal forming. Unfortunately, during the forming process of the curved surface of the sheet metal, the blank holder device mainly passively restricts the flow of the sheet metal, and the blank holder force in the device is unevenly distributed between the blank holder ring and the sheet material; resulting in uneven flow of metal , prone to defects such as wrinkling, excessive wall thickness reduction, and cracking, which affect the performance and quality of sheet metal forming.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned problems existing in the prior art, and to provide a flexible edge-drawing device for sheet metal forming, which can replace the edge-holding device and be used in conjunction with various stamping dies of different sizes and shapes; and, It is easy to adjust the size of the edge pulling force, thereby saving the design and manufacturing costs of the sheet metal forming die, shortening the research and development cycle, and suppressing defects such as wrinkling and cracking during sheet metal forming.

Above-mentioned purpose of the present invention is achieved in that, in conjunction with accompanying drawing, description is as follows:

A flexible edge pulling device for sheet metal forming, mainly composed of a plurality of clamping mechanisms 1, a plurality of pulling mechanisms 2 and a support frame 3, the plurality of clamping mechanisms 1 clamp the periphery of the processed sheet 4, and the A plurality of pulling mechanisms 2 apply edge pulling forces in different directions of the sheet material 4. The pulling mechanism 2 is composed of hydraulic cylinders arranged in the horizontal direction. The piston ends of each hydraulic cylinder are connected with the clamping mechanism 1, and the cylinder ends The part is hinged with the support frame 3, and one pulling mechanism 2 is connected to one or more clamping mechanisms 1, or two pulling mechanisms 2 are connected to one or more clamping mechanisms 1.

The clamping mechanism 1 and the pulling mechanism 2 are connected by a universal mechanism with a spherical head.

The size of the edge surface surrounded by the clamping mechanism 1 is adjustable, and it can be used in cooperation with molds of different sizes.

The shape of the clamping block in the clamping mechanism 1 is a rectangle or other irregular surfaces. When clamping blocks of different shapes are used in combination, the shape of the edge surface surrounded by them can be any shape.

All the hydraulic cylinders that make up the material pulling mechanism 2 can be driven by one hydraulic valve, or a row or one or any hydraulic cylinders can be driven by multiple hydraulic valves respectively.

The mold used in conjunction with it is an integral mold 8, or a multi-point adjustable digital mold 9.

The flexible edge-drawing device for sheet metal forming is equipped with a binder ring 10 or a binder strip 11, and the shape of the binder ring 10 or the binder strip 11 is any shape.

Technical effect: The flexible edge-drawing device for sheet metal forming of the present invention combines flexible stretch forming with die stamping forming, and uses flexible edge-drawing technology to replace the blank holder in traditional stamping, and can be compatible with various sizes and shapes. It is used in conjunction with stamping dies; moreover, it is easy to adjust the size of the edge pulling force, thereby saving the design and manufacturing costs of sheet metal forming dies, and shortening the research and development cycle of sheet metal forming. Through the setting of the universal mechanism, the clamping mechanism can freely rotate and swing around the spherical head of the universal mechanism, so that a row of multiple clamping mechanisms can form a straight line or arc arrangement, and realize multiple flexible edge pulling devices for sheet metal forming. Flexible control of the clamps; make the edge force evenly distributed, and suppress the defects such as wrinkling and cracking that occur when the sheet is formed.

Description of drawings

Fig. 1 is a schematic diagram of a flexible edge-drawing device for sheet metal forming in which a pulling mechanism is connected to a clamping mechanism.

Fig. 2 is a schematic diagram of a flexible edge-drawing device for sheet metal forming in which one pulling mechanism is connected with three clamping mechanisms.

Fig. 3 is a schematic diagram when the clamping mechanism and the pulling mechanism are connected through a universal mechanism.

Fig. 4 is the schematic diagram when the sheet material of different sizes is clamped by the flexible pull edge device for sheet metal forming, wherein

Figure 4 (a) is a schematic diagram when clamping a large-size sheet;

Fig. 4 (b) is the schematic diagram when clamping small-sized sheet material;

Fig. 5 is a schematic diagram of clamps arranged in an arc, wherein

Figure 5(a) is a schematic diagram of clamps arranged in an arc;

Fig. 5(b) is another schematic diagram of clamps arranged in an arc.

Fig. 6 is a schematic diagram when used in conjunction with the integral mold.

Fig. 7 is a schematic diagram when it is used in conjunction with a multi-point adjustable digital mold.

Fig. 8 is a schematic diagram of the placement position before clamping of the sheet metal when the blank holder is used.

Figure 9 is a schematic diagram of the placement position before the clamping of the sheet metal when the edge blanking strip is used, wherein

Figure 9(a) is a schematic diagram of the position before the plate is clamped when the straight edge is used;

Fig. 9(b) is a schematic diagram of the placement position before clamping of the sheet metal when another shape of edge strip is adopted.

Among them: 1. Clamping mechanism, 2. Pulling mechanism, 3. Support frame, 4. Sheet material, 5. Steel wire flexible shaft, 6. Ball joint rod, 7. Hydraulic cylinder piston rod for pulling mechanism, 8. Overall mold, 9. Multi-point adjustable digital mold, 10. Binder ring, 11. Binder strip.

Detailed ways

In order to suppress defects such as wrinkling and cracking of the sheet metal caused during the forming process of the curved surface of the sheet metal, the present invention is realized through the following technical solutions: the flexible edge pulling device for sheet metal forming of the present invention mainly consists of a plurality of clamping mechanisms 1 , a plurality of pulling mechanisms 2 and a support frame 3; a plurality of clamping mechanisms 1 are clamped around the sheet 4 to be processed, and a plurality of pulling mechanisms 2 apply edge pulling forces in different directions of the sheet 4. The size of the pulling edge force is adjustable, and its value is determined by the size and shape of the formed part. The pulling mechanism 2 is composed of hydraulic cylinders arranged in the horizontal direction. The piston ends of each hydraulic cylinder are connected to the clamping mechanism 1, and the cylinder ends are hinged to the support frame 3; one pulling mechanism 2 can be connected to one or more clamping mechanisms. The mechanism 1 can also be connected with one or more clamping mechanisms 1 by two pulling mechanisms 2 . A universal mechanism with a spherical head can be set between the clamping mechanism 1 and the pulling mechanism 2; the clamping mechanism 1 can freely rotate and swing around the spherical head of the universal mechanism, so that a row of multiple clamping mechanisms 1 forms Arranged in a straight line or in an arc to realize the flexible control of multiple clamps of the flexible pull-edge device for sheet metal forming. The size of the edge surface surrounded by the clamping mechanism 1 is adjustable, and can be used in conjunction with molds of different sizes, thereby saving the design and manufacturing costs of the sheet metal forming mold and shortening the development cycle of sheet metal forming. The shape of the clamping block of the clamping mechanism 1 can be a rectangle or other irregular surfaces; when clamping blocks of different shapes are used in combination, the shape of the edge surface surrounded by them can be any shape. Irregularly shaped clamping blocks can clamp sheet metal formed parts with irregular geometric shapes. In order to simplify the control system, all the hydraulic cylinders that make up the pulling mechanism 2 can be driven by one hydraulic valve, or a row or one or any number of hydraulic cylinders can be driven by multiple hydraulic valves, so as to adjust the edge pulling force. The die used in conjunction with the flexible edge pulling device for sheet metal forming can be an integral die 8 or a multi-point adjustable digital die 9 . The use of multi-point adjustable digital mold 9 can realize a set of molds to process sheet metal forming parts of different sizes and shapes, significantly shorten the production preparation cycle and save a lot of mold costs; realize moldless, rapid, digital and flexible forming of sheet metal . The flexible edge-drawing device for sheet metal forming can be equipped with a binder ring 10 or a binder strip 11, and the shape of the binder ring 10 or the binder strip 11 can be any shape. The use of the blank holder ring 10 or the blank holder strip 11 enables the flexible blank holder device for sheet metal forming to have the blank holder function in traditional stamping.

Fig. 1 is a schematic diagram of a flexible edge-drawing device for sheet metal forming in which a pulling mechanism is connected to a clamping mechanism. The pulling mechanism 2 is composed of hydraulic cylinders arranged in the horizontal direction. The piston ends of each hydraulic cylinder are connected with the clamping mechanism 1, and the cylinder end is hinged with the support frame 3; there are 24 clamping mechanisms 1 around to clamp the processed plate Around the material 4, 24 material pulling mechanisms 2 apply edge pulling forces in four directions of the sheet material 4. Certainly, the quantity of the pulling mechanism 2 and the clamping mechanism 1 is not limited by this embodiment. The size of the pulling edge force is adjustable, and its value is determined by the size and shape of the formed part. The strokes of the hydraulic cylinders in both directions are relatively large, which is beneficial to the operation during loading and unloading. Fig. 2 is a schematic diagram of a flexible edge-drawing device for sheet metal forming in which one pulling mechanism is connected with three clamping mechanisms. A flexible steel wire shaft 5 or a steel wire rope is installed between the three material clamping mechanisms 1, and the installation of the flexible steel wire shaft 5 or the steel wire rope can make the material clamping mechanism 1 keep moving substantially synchronously. One material pulling mechanism 2 drives three material clamping mechanisms 1 to exert edge pulling force on the sheet material 4 held by it, which can save the number of hydraulic cylinders, simplify the structure of the device, and reduce the manufacturing cost of the device.

Fig. 3 is a schematic diagram when the clamping mechanism and the pulling mechanism are connected by a universal mechanism with a spherical head. The clamping mechanism 1 can freely rotate and swing around the spherical head of the universal mechanism, so that a row of multiple clamping mechanisms 1 can form a straight line or an arc arrangement, and realize the flexible control of multiple clamps of the flexible edge pulling device for sheet metal forming .

Fig. 4 is a schematic diagram of sheet metal forming with a flexible pull-edge device clamping sheets of different sizes, wherein Fig. 4 (a) is a schematic diagram of clamping large-size sheets; Fig. 4 (b) is a schematic view of clamping small-size sheets schematic diagram. The size of the edge-drawing surface surrounded by the clamping mechanism 1 can be adjusted, and the device can be used in conjunction with molds of different sizes, thereby replacing the edge-holding device in the traditional stamping process, saving the design and manufacturing costs of sheet metal forming molds, and shortening the research and development process. cycle.

Fig. 5 is a schematic diagram of clamps arranged in an arc to clamp a sheet. When the sheet is formed, the flat plate will gradually deform, tend to the shape of the mold, and finally fit the mold. In this process, since multiple clamping mechanisms 1 are connected to the pulling mechanism 2 through the universal mechanism, each clamping mechanism 1 can swing and rotate in any direction, and the area where the clamping mechanism 1 clamps the sheet 4 has adaptability. The trend of mold surface changes, thereby improving the quality of drawing.

Fig. 6 is a schematic diagram when used in conjunction with the integral mold. Fig. 7 is a schematic diagram when it is used in conjunction with a multi-point adjustable digital mold. The overall mold 8 is suitable for mass production, which is beneficial to ensure the forming accuracy of curved surface parts and the repeatability of product processing. The multi-point adjustable digital mold 9 is suitable for single-piece or small-batch production. It can process formed parts of different sizes and shapes with a set of molds, significantly shortening the production preparation cycle and saving a lot of mold costs; Digital and flexible forming.

Fig. 8 is a schematic diagram of the placement positions of the former two when the blank holder is used for clamping the sheet. The use of the blank holder 10 enables the flexible blank holder for sheet metal forming to have the blank holder function in traditional stamping. Fig. 9 is a schematic diagram of the placement position before clamping of the sheet metal when the edge holder is used. The binder strip in Fig. 9(a) has a simple structure and is easy to manufacture; the binder strips in Fig. 9(b) can constrain each other to ensure that the blankholder 10 does not move during the sheet metal forming process. Of course, the shape of the binder strip 11 can be any shape; the installation of the binder strip 11 can replace the use of the binder ring 10, and the binder ring 10 of any shape can be flexibly assembled.

Claims (7)

1. A flexible edge pulling device for sheet metal forming, characterized in that it is mainly composed of multiple clamping mechanisms (1), multiple pulling mechanisms (2) and support frames (3), and is composed of multiple clamping mechanisms (1) Clamping around the sheet to be processed (4), a plurality of pulling mechanisms (2) apply edge pulling forces in different directions of the sheet (4), and the pulling mechanisms (2) are arranged horizontally Composed of hydraulic cylinders, the piston end of each hydraulic cylinder is connected with the clamping mechanism (1), the end of the cylinder body is hinged with the support frame (3), and one pulling mechanism (2) is connected with one or more clamping mechanisms (1) ), or connect one or more clamping mechanisms (1) by two pulling mechanisms (2). 2. The flexible edge drawing device for sheet metal forming according to claim 1, characterized in that, the clamping mechanism (1) and the pulling mechanism (2) are connected by a universal mechanism with a spherical head . 3. The flexible edge-drawing device for sheet metal forming according to claim 1 or 2, characterized in that the size of the edge-drawing surface surrounded by the clamping mechanism (1) is adjustable, and it is compatible with molds of different sizes With the use of. 4. The flexible edge drawing device for sheet metal forming according to claim 3, characterized in that, the shape of the clamping block in the clamping mechanism (1) is a rectangle or other irregular surfaces; clamps of different shapes When the material blocks are used in combination, the shape of the edge surface surrounded by them can be any shape. 5. The flexible edge pulling device for sheet metal forming according to claim 3, characterized in that all the hydraulic cylinders forming the pulling mechanism (2) are driven by one hydraulic valve, or a row or One or any hydraulic cylinder. 6. The flexible edge pulling device for sheet metal forming according to claim 3, characterized in that, the mold is an integral mold (8), or a multi-point adjustable digital mold (9). 7. The flexible edge-drawing device for sheet metal forming according to claim 1, characterized in that, the flexible edge-drawing device for sheet metal forming is equipped with a binder ring (10) or a binder strip (11), and the binder The shape of circle (10) or edge binder (11) is arbitrary shape.

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