CN1994611A - Composite flexible cushion for multi-spot forming equipment - Google Patents

Abstract

The invention discloses a composite flexible cushion for multi-point forming equipment, which consists of a surface rubber matrix (1), a bottom rubber matrix (5), a second layer of reinforced skeleton (2), and a second layer of rubber matrix (3). , The first layer of reinforced skeleton (4) is composed, the second layer of reinforced skeleton (2) is set between the surface rubber matrix (1) and the second layer of rubber matrix (3), the first layer of reinforced skeleton (4) is set at the Between the second layer of rubber matrix (3) and the bottom rubber matrix (5); the second layer of reinforced skeleton (2) is composed of discretely placed reinforcements (7), and the first layer of reinforced skeleton (4) is composed of discretely placed reinforcements (6), and the reinforcing body (7) in the second-layer reinforced skeleton (2) is perpendicular to the reinforcing body (6) in the first-layer reinforced skeleton (4).

Description

A composite flexible cushion for multi-point forming equipment

technical field

The invention belongs to the field of sheet material forming, and in particular relates to a flexible pad used for preventing surface defects of parts and controlling the forming precision of parts when multi-point forming equipment is used for forming flexible parts.

Background technique

The multi-point forming equipment uses the tops of multiple height-adjustable units to form a space envelope surface, replacing the solid surface of the traditional mold, so as to meet the manufacturing needs of different parts with one set of equipment. In the field of flexible sheet metal forming, especially It has an important application prospect in aircraft skin manufacturing.

Although multi-point forming equipment solves the problem of insufficient flexibility of traditional forming equipment, when using multi-point forming technology, since the space envelope surface describing the mold surface does not physically exist, the mold is actually in contact with the surface of the part during the forming process At the top of each adjustable unit, in this "point-surface" contact mode, a variety of defect forms will occur on the surface of the part. The existence of surface defects not only affects the surface quality of the parts, but also damages the parts in severe cases and affects the life. Therefore, it is necessary to use a flexible process cushion between the raw materials of the parts and the multi-point forming equipment to suppress the occurrence of various defects. In the current research on multi-point forming technology, simple rubber pads are generally used as the process cushion in the forming process.

Although a rubber pad with sufficient thickness can completely eliminate the forming defects such as pits and collapses caused by the discontinuous contact state on the surface of the part, but an over-thick rubber pad also brings difficulties to the control of the precision of the part. The shape of the part and the target shape no longer have a geometrically similar relationship.

Contents of the invention

The purpose of the present invention is to provide a composite flexible cushion for multi-point forming equipment. The composite flexible cushion overcomes the shortcomings of the existing simple rubber material cushion by adding a reinforced skeleton between two rubber substrates. On the one hand, the process accumulation in the conventional solid mold can be smoothly transplanted to the forming process using the multi-point forming mold; on the other hand, with the help of the new structure of the flexible cushion, the existing iterative algorithm will have higher Adjustment efficiency and better adjustment accuracy.

The invention is a composite flexible cushion for multi-point forming equipment, which is composed of a surface rubber matrix, a bottom rubber matrix, a second layer of reinforced skeleton, a second layer of rubber matrix, a first layer of reinforced skeleton, and a second layer of reinforced skeleton It is set between the surface rubber matrix and the second layer of rubber matrix, and the first layer of reinforced skeleton is arranged between the second layer of rubber matrix and the bottom rubber matrix; the second layer of reinforced skeleton is composed of discretely placed reinforcements, and the first layer of reinforced The skeleton is composed of discretely placed reinforcements, and the reinforcements in the second layer of reinforced skeleton are perpendicular to the direction of the reinforcements in the first layer of reinforced skeleton.

The composite flexible cushion layer is composed of a surface rubber matrix, a bottom rubber matrix and a first layer of reinforced skeleton, the first layer of reinforced skeleton is arranged between the surface rubber matrix and the bottom rubber matrix, and the first layer of reinforced skeleton is discretely placed Reinforcement composition.

The reinforcement of the composite flexible pad is a thin metal plate, wire, wire mesh or cord.

When the composite flexible cushion of the present invention has a multi-layer structure, when the selected reinforcing body is different, the placing position of the reinforcing body is also different.

The advantages of the composite flexible cushion of the present invention are: (1) with discrete metal sheets and filamentary materials as the reinforcement structure, it overcomes the defect of poor profile quality caused by the cushion made of simple rubber materials in the process of parts processing ; (2) in the composite flexible cushion with multi-layer structure, the metal sheets in the same layer of reinforced skeleton are placed in a discrete manner; (3) in the composite flexible cushion with multi-layer structure, the metal sheets isolated by the rubber matrix For the reinforced skeleton, each layer can be made of the same material or different materials; (4) Compared with the simple rubber material cushion, the total thickness of the composite cushion can be greatly reduced.

Description of drawings

Fig. 1 is a schematic diagram of the external structure of the composite flexible pad of the present invention.

FIG. 2 is an exploded view of FIG. 1 .

Figure 3 is an exploded view of another embodiment of the present invention.

In the figure: 1. Surface rubber matrix 2. Second layer of reinforced skeleton 3. Second layer of rubber matrix 4. First layer of reinforced skeleton 5. Bottom rubber matrix 6. Reinforcement body 7. Reinforcement body

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings.

Please refer to Fig. 1 and shown in Fig. 2, the present invention is a kind of composite flexible pad suitable for aircraft skin manufacturing, consists of surface layer rubber matrix 1, bottom rubber matrix 5, second layer reinforcement skeleton 2, second layer rubber The matrix 3 and the first layer of reinforced skeleton 4 are composed. The second layer of reinforced skeleton 2 is set between the surface rubber matrix 1 and the second layer of rubber matrix 3. The first layer of reinforced skeleton 4 is set between the second layer of rubber matrix 3 and the bottom rubber. Between the bases 5; the second layer of reinforced skeleton 2 is composed of discretely placed reinforcements 7, the first layer of reinforced skeleton 4 is composed of discretely placed reinforcements 6, and the reinforced body 7 in the second layer of reinforced skeleton 2 is the same as the first The reinforcements 6 in the layer reinforcement skeleton 4 run orthogonally. The reinforcements 6 (or reinforcements 7 ) in the same layer can have the same width or different widths. The thickness of the reinforcements 6 (or reinforcements 7 ) is 0.1 mm to 1 mm, and the width is 10 mm to 40 mm. The spacing between reinforcing body 6 (or reinforcing body 7) placed on the same level can be fixed or at any distance; in the present invention, reinforcing body 6 (or reinforcing body 7) and reinforcing body on the same level The distance between 6 (or reinforcing bodies 7) is 10mm-40mm.

See also shown in Figure 3, shown in the figure is a composite flexible cushion layer with a single-layer reinforced skeleton, the cushion layer is provided with a first layer of reinforced skeleton 4 between the surface rubber matrix 1 and the bottom rubber matrix 5, the first The layer reinforced skeleton 4 is composed of discretely placed reinforcements 6 .

In the present invention, the reinforcements respectively placed in the first-layer reinforcing frame 4 and the second-layer reinforcing frame 2 may be metal sheets, wires, wire meshes or cords. In order to make the composite flexible cushion layer of the present invention have a better profile quality during the skin-drawing process of the dot matrix nail mold, the placement methods of its reinforcements are as follows: Here, it is considered to increase the way of mixing and placing different materials , For example, the first layer is a metal plate and the second layer is a cord or wire mesh.

(A) When a thin metal plate is used as a reinforcement

(a) A single-layer composite flexible cushion is made, and the reinforcements 6 in the reinforcement frame 4 of the first layer can be arranged horizontally or vertically or obliquely according to a certain distance.

(b) To make a multi-layer composite flexible cushion, ① the reinforcements 6 in the reinforcement frame 4 of the first layer can be arranged laterally according to a certain interval, and the reinforcements 7 in the reinforcement frame 2 of the second layer are reinforced according to the reinforcements in the reinforcement frame 4 of the first layer The spacing of the reinforcements 6 is arranged longitudinally; ② The reinforcements 6 in the first layer of reinforcement skeleton 4 can be arranged longitudinally at a certain interval, while the reinforcements 7 in the second layer of reinforcement skeleton 2 follow the spacing of reinforcements 6 in the first layer of reinforcement skeleton 4 Horizontally arranged; ③The reinforcements 6 in the first layer of reinforced skeleton 4 can be arranged horizontally according to a certain distance, while the reinforced bodies 7 in the second layer of reinforced skeleton 2 are arranged obliquely according to the spacing of the reinforced bodies 6 in the first layer of reinforced skeleton 4;④ The reinforcing bodies 6 in the reinforcing frame 4 of the first layer may be longitudinally arranged at a certain interval, while the reinforcing bodies 7 in the reinforcing frame 2 of the second layer are arranged obliquely according to the pitch of the reinforcing bodies 6 in the reinforcing frame 4 of the first layer.

(B) Metal wire as reinforcement

(a) A single-layer composite flexible cushion is made, and its reinforcement is placed in the same way as the metal sheet.

(b) A multi-layer composite flexible cushion is made, and its reinforcement is placed in the same way as the metal sheet.

(C) When the wire mesh is used as a reinforcement

(a) To make a single-layer composite flexible cushion, lay the wire mesh between two layers of rubber substrates.

(b) A multi-layer composite flexible cushion is made, which is a superimposed form of a single layer.

(D) When the cord is used as a reinforcement

(a) To make a single-layer composite flexible cushion, lay the cord between two layers of rubber matrix.

(b) A multi-layer composite flexible cushion is made, which is a superimposed form of a single layer.

The composite flexible cushion layer of the present invention is generally processed to a thickness of 3 mm to 30 mm, and the cushion layer is too thick or too thin to enable the parts to have better surface quality and profile accuracy during the skin-drawing process of the dot matrix nail mold.

The present invention designs a composite interlayer flexible cushion layer, which is used for lattice nail mold skin drawing, uses rubber as a base material, and uses discrete metal sheets or filamentous materials as reinforcement structures. Laths or filamentary materials are freely layered orthogonally or in braided form, single or multi-layered. This kind of cushion can not only maintain the basic elasticity, but also greatly improve the uniformity of cushion thickness and deformation, overcome the shortcomings of the existing simple rubber material cushion for the skin drawing of the dot matrix nail mold, improve the skin forming accuracy, and at the same time It can improve the iterative efficiency of the existing profile control algorithm and reduce the difficulty of calculating the amount of mold adjustment.

Claims (8)

1. A composite flexible cushion for multi-point forming equipment, characterized in that: it consists of a surface rubber matrix (1), a bottom rubber matrix (5), a second layer of reinforced skeleton (2), a second layer of rubber matrix ( 3), the first layer of reinforced skeleton (4), the second layer of reinforced skeleton (2) is set between the surface rubber matrix (1) and the second layer of rubber matrix (3), the first layer of reinforced skeleton (4) is set Between the second layer of rubber matrix (3) and the bottom rubber matrix (5); the second layer of reinforced skeleton (2) is composed of discretely placed reinforcements (7), and the first layer of reinforced skeleton (4) is made of discretely placed Reinforcement body (6) constitutes, and the reinforcement body (7) in the second layer reinforcement frame (2) and the reinforcement body (6) in the first layer reinforcement frame (4) are towards orthogonal; The reinforcement body (6) And said reinforcement (7) is a metal sheet, wire, wire mesh or cord. 2. A composite flexible cushion for multi-point forming equipment, characterized in that it consists of a surface rubber matrix (1), a bottom rubber matrix (5) and a first layer of reinforced skeleton (4), the first layer of reinforced skeleton (4) Located between the surface rubber matrix (1) and the bottom rubber matrix (5), the first layer of reinforced skeleton (4) is composed of discretely placed reinforcements (6); the reinforcements (6) are thin metal plates , wire, wire mesh or cord. 3. The composite flexible cushion according to claim 1, characterized in that: when the reinforcing body is a thin metal plate, the way of placing the reinforcing body metal sheet (6) in the first layer of reinforcing skeleton (4) is at a distance of 10 mm to 40 mm. The reinforcing body metal sheets (7) in the second layer of reinforcing frame (2) are arranged vertically according to the spacing of the reinforcing body metal sheets (6) in the first layer of reinforcing frame (4). 4. The composite flexible cushion according to claim 1, characterized in that: when the reinforcing body is a thin metal plate, the way of placing the reinforcing body metal sheet (6) in the first layer of reinforcing skeleton (4) is at a distance of 10 mm to 40 mm. The reinforcing body metal sheets (7) in the second layer of reinforcing frame (2) are arranged in the transverse direction according to the spacing of the reinforcing body metal sheets (6) in the first layer of reinforcing frame (4). 5. The composite flexible cushion according to claim 1, characterized in that: when the reinforcing body is a thin metal plate, the placement method is that the metal thin plates (6) of the reinforcing body in the first layer of reinforcing skeleton (4) are placed at a distance of 10 mm to 40 mm. The reinforcement metal sheets (7) in the reinforcement frame (2) of the second layer are arranged obliquely according to the spacing of the reinforcement metal sheets (6) in the reinforcement frame (4) of the first layer. 6. The composite flexible cushion according to claim 1, characterized in that: when the reinforcing body is a thin metal plate, the way of placing the reinforcing body metal sheet (6) in the first layer of reinforcing skeleton (4) is at a distance of 10 mm to 40 mm. The reinforcement metal sheets (7) in the reinforcement frame (2) of the second layer are arranged obliquely according to the spacing of the reinforcement metal sheets (6) in the reinforcement frame (4) of the first layer. 7. The composite flexible cushion according to claim 1 or 2, characterized in that the thickness of the composite flexible cushion is 3mm-30mm. 8. The composite flexible cushion according to claim 1 or 2, characterized in that the thickness of the reinforcement metal plate is 0.1mm-0.6mm, the diameter of the reinforcement wire is 0.1mm-1mm, and the thickness of the reinforcement cord is 0.1mm-1mm.

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