Clamping device for incremental forming of multi-size plates

Abstract

The utility model discloses a clamping device for incremental forming of plates of multiple sizes. The clamping device comprises a clamping adjusting plate (1), a clamping plate (2), a base (5), a trapezoidal nut (6), a supporting column (7) and a clamping bottom plate (8). According to the device, the upper cylinder (21) and the lower cylinder (23) of the material clamping plate (2) slide in the straight groove hole (13) and the hexagonal moving groove (82) respectively by rotating the material clamping adjusting plate (1) and pushing the supporting column (7), so that the size of a material clamping opening is changed, and plates with different sizes can be clamped and supported. When negative forming is carried out, the size of a material clamping opening can be changed by rotating the material clamping adjusting plate (1) and pushing the supporting column (7) to enable the material clamping plate (2) to slide in the moving groove, supporting can be provided for forming of plate materials, therefore, machining of parts of different sizes and different shapes is achieved, and the machining efficiency and precision are improved.

Description

Technical Field

[0001] The utility model relates to a clamping device for incremental forming of multi-size sheet materials, especially a clamping device for circular sheet materials of different sizes. Background Technique

[0002] The sheet metal incremental forming technology can control the tool head to gradually form the sheet material according to a predetermined trajectory through a numerical control device, without the need for special molds or only simple molds, which greatly reduces the cost and production preparation cycle and has great advantages in the processing of small-batch products.

[0003] However, in actual production and processing, clamping devices corresponding to different sizes of sheet materials are required. If a large clamping device is used to process small products, it will cause great waste of sheet materials. Although the Chinese utility model patent CN207205078U has disclosed a clamping device for single-point incremental forming of sheet materials, which can adjust the clamping range according to the size of the sheet material, this device is only applicable to rectangular sheet materials and is not applicable to circular or polygonal sheet materials.

[0004] In the incremental forming process, according to the position of the formed sheet material in the clamping device, it is divided into positive forming and negative forming. Positive forming means that the formed sheet material is located above the clamping device and requires a punch support, and is mostly used to form complex and high-precision parts; negative forming means that the formed sheet material is located below the clamping device and does not require a mold, and is usually used to form simple and low-precision parts. In negative forming, since the forming area is far from the sheet material clamping position, bending will occur in the outermost layer of the forming area, reducing the forming accuracy. The current solution is to make the clamping position of the clamping device as close as possible to the forming area to provide support for the forming area, but this method will require different clamping devices for different forming areas, increasing the production cost. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the defect in the above-mentioned prior art that it is difficult to clamp and support different forming areas. For this reason, a clamping device for incremental forming of multi-size sheet materials is proposed. This clamping device solves the clamping problems of sheet materials of different sizes and the support problems of sheet materials at the same time, and can realize the processing of positive forming and negative forming, expanding the processing range.

[0006] In order to solve the above technical problems, the technical solutions adopted by the utility model include:

[0007] A clamping device for multi-size sheet metal incremental forming, comprising a material clamping adjustment plate 1, a material clamping plate 2, a base 5, a trapezoidal nut 6, a support column 7, and a material clamping bottom plate 8. A first through hole 12 is formed in the middle of the material clamping adjustment plate 1, and six circumferentially arrayed annular slot holes 11 and six circumferentially arrayed first straight slot holes 13 are formed around the periphery thereof. The annular slot holes 11 are used to fix the material clamping plate 2 on the material clamping bottom plate 8, and the six first straight slot holes 13 are used for guiding when the material clamping plate 2 rotates and moves.

[0008] For the clamping device described above, two rows of first threaded holes 22 with the same size for fixing the sheet metal are provided at the front end of the material clamping plate 2. At the rear end of the material clamping plate 2, an upper cylinder 21 and a lower cylinder 23 protruding symmetrically up and down are provided. The upper cylinder 21 is placed in the first straight slot hole 13 of the material clamping adjustment plate 1, and the lower cylinder 23 is placed in the hexagonal moving slot 82 of the material clamping bottom plate 8.

[0009] For the clamping device described above, second through holes 52 and second threaded holes 53 are formed around the base 5. The second through holes 52 are used to fix the other end of the guide post 3, and the second threaded holes 53 are used to fix the guide sleeve 4. The bolt 41 on the guide sleeve 4 is used to clamp the guide post 3. Second straight slot holes 54 are formed on the four sides of the base 5 for fixing the base 5 on the incremental forming machine tool, and a movement track groove 51 corresponding to the movement track of the threaded hole 24 on the material clamping plate 2 for fixing the support column is formed in the middle part.

[0010] For the clamping device described above, a trapezoidal nut 6 is installed in the movement track groove 51. A support column 7 with threads at both ends is installed on the trapezoidal nut 6. The other end of the support column 7 is fixed on the third threaded hole 24 at the front end of the material clamping plate 2 for fixing the support column. Among the six material clamping plates 2, a support column 7 is installed for every other material clamping plate to support the material clamping plates and fix the relative positions between the material clamping plates.

[0011] For the clamping device described above, a third through hole 81 of the same size as that on the material clamping adjustment plate 1 is provided at the central position of the material clamping bottom plate 8. A hexagonal moving slot 82 is provided around the third through hole 81. A circle of fourth threaded holes 83 corresponding to the positions of the annular slot holes 11 on the material clamping adjustment plate 1 is provided around the hexagonal moving slot 82. After adjusting the size of the material clamping opening, bolts can be used to pass through the annular slot holes 11 on the material clamping adjustment plate 1 and tighten them on the fourth threaded holes 83 to press the material clamping adjustment plate 1. Fourth through holes 84 and fifth threaded holes 85 are formed around the material clamping bottom plate 8. The fourth through holes 84 are used to install the guide post 3, and the fifth threaded holes 85 are used to install the guide sleeve 4.

[0012] For the device of the present utility model, a chute structure is adopted to adjust the size of the material clamping opening. A smaller material clamping opening can also provide support for sheet metal forming, reduce the bending of the forming edge. At the same time, in order to prevent the chute mechanism from jamming, a support column is also installed in the mechanism, which can not only play a sliding role but also provide a supporting force for incremental forming.

[0013] The device of the present utility model adjusts the clamping plate 1 by rotation and pushes the support column 7, so that the upper cylinder 21 and the lower cylinder 23 of the clamping plate 2 slide in the straight slot hole 13 and the hexagonal moving slot 82 respectively, changing the size of the clamping opening, and thus can clamp and support sheet materials of different sizes. When performing negative forming, rotating the clamping plate adjusting plate 1 and pushing the support column 7 to make the clamping plate 2 slide in the movement slot can change the size of the clamping opening, provide support for the forming of the sheet material, thereby realizing the processing of parts of different sizes and shapes, and improving the processing efficiency and accuracy. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of a clamping device for multi-size sheet metal incremental forming of the present utility model.

[0015] Figure 2 It is a schematic structural diagram of the clamping plate adjusting plate of a clamping device for multi-size sheet metal incremental forming of the present utility model.

[0016] Figure 3 It is a schematic structural diagram of the clamping plate of a clamping device for multi-size sheet metal incremental forming of the present utility model.

[0017] Figure 4 It is a schematic structural diagram of the feeding bottom plate of a clamping device for multi-size sheet metal incremental forming of the present utility model.

[0018] Figure 5 It is a schematic structural diagram of the base of a clamping device for multi-size sheet metal incremental forming of the present utility model. Detailed Description of the Invention

[0019] The following will describe the present utility model in detail with reference to specific embodiments.

[0020] A clamping device for incremental forming of sheet materials of different sizes includes a clamping plate adjusting plate 1, a clamping plate 2, a guide post 3, a guide sleeve 4, a base 5, a trapezoidal nut 6, a support column 7, and a clamping bottom plate 8; the annular slot hole 11 of the clamping plate adjusting plate 1 is aligned with the annular array of threaded holes 83 of the clamping bottom plate 8, and the straight slot hole 13 is aligned with the upper cylinder 21 of the clamping plate 2; the lower cylinder 23 is aligned with the hexagonal moving slot 82 of the clamping base 8; a support column 7 is installed in a threaded hole 24 at the front end of the clamping plate 2 by threaded connection; the lower part of the support column 7 is connected to the trapezoidal nut 6 by threaded connection; the trapezoidal nut 6 is installed in a track slot on the clamping base 8 that has the same movement track as the threaded hole of the clamping plate 2; the clamping bottom plate 8 and the base 5 are connected and fixed by the guide post 3 and the guide sleeve 4.

[0021] A through hole 12 is opened in the middle of the clamping plate adjusting plate 1, and 6 circumferentially arrayed annular slot holes 11 and 6 circumferentially arrayed straight slot holes 13 are opened on its periphery, asFigure 2 As shown, the middle through-hole 12 is the largest area for sheet metal forming. The annular slot hole 11 is used to fix the clamping plate 2 on the clamping bottom plate 8, and the six straight slot holes 13 are used for guiding when the clamping plate 2 rotates and moves.

[0022] At the front end of the clamping plate 2, there are two rows of threaded holes 22 with the same size for fixing the sheet metal. Different threaded holes 22 are selected according to the size of the sheet metal for fixing. At the rear end of the clamping plate 2, there are upper cylinder 21 and lower cylinder 23 that protrude symmetrically up and down. As Figure 3 shown, the upper cylinder 21 is placed in the radial straight slot hole 13 of the clamping adjustment plate 1, and the lower cylinder 23 is placed in the hexagonal moving slot 82 of the clamping bottom plate 8.

[0023] At the center position of the clamping bottom plate 8, there is a through-hole 81 with the same size as that on the clamping adjustment plate 1. Around the through-hole 81 is the hexagonal moving slot 82. There is a circle of threaded holes 83 corresponding to the position of the annular slot hole 11 on the clamping adjustment plate 1 around the hexagonal moving slot 82. After adjusting the size of the clamping opening, a bolt can be used to pass through the annular slot hole 11 on the clamping adjustment plate 1 and tighten it on the threaded hole 83 to press the clamping adjustment plate 1. Through-holes 84 and threaded holes 85 are opened around the clamping bottom plate 8. As Figure 4 shown, the through-hole 84 is used for installing the guide post 3, and the threaded hole 85 is used for installing the guide sleeve 4.

[0024] Through-holes 52 and threaded holes 53 are opened around the base 5. The through-hole 52 is used for fixing the other end of the guide post 3, and the threaded hole 53 is used for fixing the guide sleeve 4. The bolt 41 on the guide sleeve 4 is used for clamping the guide post 3. Straight slot holes 54 are opened on the four sides of the base 5 for fixing the base 5 on the incremental forming machine tool. A movement track groove 51 corresponding to the movement track of the threaded hole 24 for fixing the support column on the clamping plate 2 is opened in the middle part. As Figure 5 shown.

[0025] A trapezoidal nut 6 is installed in the movement track groove 51. A support column 7 with threads at both ends is installed on the trapezoidal nut 6. The other end of the support column 7 is fixed on the threaded hole 24 for fixing the support column at the front end of the clamping plate 2. Among the six clamping plates 2, a support column 7 is installed every other clamping plate to support the clamping plate and fix the relative position between the clamping plates.

[0026] Determine the position that the clamping adjustment plate 1 needs to adjust according to the size of the processed sheet metal and the forming range. At the same time, the support column 7 will also be adjusted to the corresponding position following the clamping adjustment plate 1. Then, a bolt can be used to pass through the annular slot of the clamping adjustment plate 1 and tighten it on the threaded holes in the corresponding annular array of the clamping bottom plate 8 to fix the clamping plate 2.

[0027] Place the sheet metal at the center of the material clamping opening, use a small pressure block to press the edge of the sheet metal, and pass a bolt through the center of the pressure block and tighten it into the threaded hole at the front end of the material clamping plate 2, thereby fixing the sheet metal.

[0028] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A clamping device for multi-size sheet metal incremental forming, characterized in that It includes a material clamping adjustment plate (1), a material clamping plate (2), a base (5), a trapezoidal nut (6), a support column (7), and a material clamping bottom plate (8); a first through hole (12) is opened in the middle of the material clamping adjustment plate (1), and six circumferentially arrayed annular slot holes (11) and six circumferentially arrayed first straight slot holes (13) are opened around it. The annular slot holes (11) are used to fix the material clamping plate (2) on the material clamping bottom plate (8), and the six first straight slot holes (13) are used for guiding when the material clamping plate (2) rotates and moves.

2. The clamping device according to claim 1, characterized in that, At the front end of the material clamping plate (2), there are two rows of first threaded holes (22) of the same size for fixing the sheet material. At the rear end of the material clamping plate (2), there are symmetrically protruding upper cylinders (21) and lower cylinders (23) above and below. The upper cylinder (21) is placed in the first straight slot hole (13) of the material clamping adjustment plate (1), and the lower cylinder (23) is placed in the hexagonal moving slot (82) of the material clamping bottom plate (8).

3. The clamping device according to claim 1, characterized in that, Second through holes (52) and second threaded holes (53) are opened around the base (5). The second through holes (52) are used to fix the other end of the guide post (3), and the second threaded holes (53) are used to fix the guide sleeve (4). The bolt (41) on the guide sleeve (4) is used to clamp the guide post (3). Second straight slot holes (54) are opened on the four sides of the base (5) for fixing the base (5) on the incremental forming machine tool. A movement track groove (51) corresponding to the movement track of the third threaded hole (24) for fixing the support column on the material clamping plate (2) is opened in the middle part.

4. The clamping device according to claim 3, wherein, A trapezoidal nut (6) is installed in the movement track groove (51). A support column (7) with threads at both ends is installed on the trapezoidal nut (6). The other end of the support column (7) is fixed on the third threaded hole (24) for fixing the support column at the front end of the material clamping plate (2). Among the six material clamping plates (2), a support column (7) is installed for every other material clamping plate to support the material clamping plate and fix the relative positions between the material clamping plates.

5. The clamping device according to claim 1, wherein, A third through hole (81) of the same size as that on the material clamping adjustment plate (1) is located at the center of the material clamping bottom plate (8). A hexagonal moving slot (82) is around the third through hole (81). There is a circle of fourth threaded holes (83) around the hexagonal moving slot (82) corresponding to the positions of the annular slot holes (11) on the material clamping adjustment plate (1). After adjusting the size of the material clamping opening, bolts can be used to pass through the annular slot holes (11) on the material clamping adjustment plate (1) and tighten them on the fourth threaded holes (83) to press the material clamping adjustment plate (1). Fourth through holes (84) and fifth threaded holes (85) are opened around the material clamping bottom plate (8). The fourth through holes (84) are used to install the guide post (3), and the fifth threaded holes (85) are used to install the guide sleeve (4).

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