Machining method for irregular thin-wall part

Abstract

The invention provides a machining method for irregular thin-walled parts, which comprises the following steps that a thin-walled material is machined into a regular shape, and the thin-walled material is provided with a forming area for forming a target product and an auxiliary area located on the peripheral side of the forming area; a clamp is used for clamping the affiliated area, and machining of the target product is completed in the forming area; milling the thin-wall material around the peripheral contour line of the target product so as to form a group of thin-wall connecting belts surrounding the peripheral side of the target product on the affiliated area; the thin-wall material is detached from the clamp, and the thin-wall material is cut along the thin-wall connecting belt through a cutter so that the affiliated area can be separated from the target product; according to the machining method, multiple times of clamping and positioning are not needed when the target product is machined, tool connecting marks are avoided, and the machining efficiency and the product quality are improved; after the target product is formed, the target product can be obtained only by milling the thin-wall connecting band on the periphery of the outline of the target product and then cutting the thin-wall connecting band.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and more specifically, to a machining method for irregular thin-walled parts. Background Technology

[0002] Thin-walled parts are prone to deformation during machining, especially for some large and irregularly shaped thin-walled parts. If conventional pressure milling is used for machining, the clamping position of the thin-walled parts needs to be changed constantly to avoid interference from the fixture due to changes in the shape and machining position of the thin-walled parts, resulting in low machining efficiency. In addition, some thin-walled parts have machining features on both sides.

[0003] Therefore, every change in the clamping position of a thin-walled part will change the coordinates of the part's machining origin. Even with a high-precision CNC machine tool, tool marks are easily generated on the product surface, which cannot guarantee the forming quality of the thin-walled part. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings mentioned in the background art and provide a processing method for irregular thin-walled parts.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A method for machining irregular thin-walled parts includes the following steps: S1. Processing thin-walled material into a regular shape, the thin-walled material having a molding area for molding the target product and an auxiliary area located around the molding area; S2. Use a fixture to hold the auxiliary area and complete the processing of the target product in the forming area; S3. Mill thin-walled material around the outer contour of the target product to form a set of thin-walled connecting strips around the periphery of the target product in the auxiliary area; S4. Remove the thin-walled material from the fixture and use a cutting tool to cut along the thin-walled connecting strip to separate the attached area from the target product.

[0006] In the processing method for irregular thin-walled parts of the present invention, the thin-walled material is first formed into a regular shape. At the same time, it is ensured that the thin-walled material has a forming area for processing the target product, and the forming area has an auxiliary area around it for easy clamping, which facilitates clamping and positioning by the fixture. Therefore, during the processing, only the processing program of the CNC machine tool needs to be set to process the target product, without the need for multiple clamping and positioning, avoiding the generation of tool marks, and improving processing efficiency and product quality.

[0007] In addition, once the target product is formed, a thin-walled connecting strip can be milled out around the outline of the target product, and then the thin-walled connecting strip can be cut to obtain the target product.

[0008] Furthermore, step S3 includes the following sub-steps: Use a large-diameter milling cutter to mill around the outer contour of the target product, so that the thickness of the milled area is 0.5mm to 1mm; Mill the area layer by layer using a small diameter milling cutter until a thin-walled connecting band with a thickness of 0.1 mm to 0.4 mm is formed.

[0009] Most of the blank material is removed by rough milling with a larger diameter milling cutter, and then fine milling is performed layer by layer with a smaller diameter milling cutter to form a thin-walled connecting strip with an extremely thin wall thickness, which is easy to cut. Moreover, the above milling method can avoid deformation and damage of the thin-walled connecting strip during the milling process and ensure milling positioning.

[0010] Furthermore, the single-layer milling thickness parameter in layer-by-layer milling is 0.1 mm.

[0011] Furthermore, the fixture includes multiple vacuum suction cups or pressure plates, which are uniformly clamped on the peripheral area around the forming area in step S2.

[0012] Furthermore, when the thin-walled material is an aluminum alloy part, the thickness of the thin-walled connecting strip is 0.2 mm to 0.3 mm.

[0013] Furthermore, when the fixture uses multiple pressure plates, the thickness of the thin-walled connecting strip is 0.2 mm.

[0014] Furthermore, when the fixture uses multiple vacuum chucks, the thickness of the thin-walled connecting strip is 0.2 mm to 0.3 mm.

[0015] Furthermore, when the thin-walled part is made of polyoxymethylene plastic, the thickness of the thin-walled connecting strip is 0.4 mm.

[0016] Further, in step S4, the thin-walled connecting strip is manually cut to separate the attached area from the target product.

[0017] Furthermore, in step S1, the regular shape includes a rectangle or a circle, wherein the forming area is located in the middle of the thin-walled material, and the shape of the thin-walled material can be flexibly selected according to the arrangement of the fixture. Attached Figure Description

[0018] Figure 1 A process flow diagram of a method for processing irregular thin-walled parts provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of the thin-walled material provided in the embodiments of the present invention. Figure 1 ; Figure 3 A schematic diagram of the structure of the thin-walled material provided in the embodiments of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the structure of the target product provided in an embodiment of the present invention; The attached diagram lists the components represented by each number as follows: 1. Thin-walled material; 10. Molding area; 11. Auxiliary area; 12. Thin-walled connecting strip; 2. Target product. Detailed Implementation

[0019] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0020] Reference Figures 1 to 4 This invention provides a method for processing irregular thin-walled parts, comprising the following steps: S1. Process the thin-walled material 1 into a regular shape, and ensure that the thin-walled material 1 has a molding area 10 for molding the target product 2. In addition, the outer periphery of the molding area 10 must have an auxiliary area 11. S2. Use a clamp to hold the auxiliary area 11 so that the thin-walled material 1 is firmly held; then, use a forming tool to complete the processing of the target product 2 in the forming area 10. S3. After the target product 2 is processed, the thin-walled material 1 is milled around the outer contour line of the target product 2 to form a set of thin-walled connecting strips 12 that wrap around the outer periphery of the target product 2 on the attached area 11 of the thin-walled material 1. S4. Finally, remove the thin-walled material 1 from the fixture, and use a cutting tool to cut along the thin-walled connecting strip 12 to separate the auxiliary area 11 from the target product 2, thereby obtaining the target product 2.

[0021] In the processing method for irregular thin-walled parts of the present invention, since the auxiliary area 11 is located outside the forming area 10, interference is less likely to occur between the fixture and the forming tool. During the processing, only the processing program of the CNC machine tool needs to be set to process the target product 2, without the need for multiple clamping and positioning, thus avoiding the generation of tool marks. In addition, since the thin-walled part has a regular shape, it is more suitable for the arrangement of the fixture on the machine tool, which facilitates the stable clamping of the thin-walled part and makes it less likely to deform during the processing. At the same time, the fixture does not contact the forming area, which can avoid clamping marks on the surface of the target product 2.

[0022] It is easy to understand that in step S1, the so-called regular shape is determined by the arrangement of the fixtures on the machine tool. That is, according to the distribution of different clamping points on the fixtures, the so-called regular shape can be adaptively set to a shape such as a rectangle or a circle.

[0023] In some embodiments, in order to facilitate the clamping and positioning of the fixture and the separation of the forming area 10 from the auxiliary area 11, when obtaining the thin-walled material 1, it is necessary to ensure that the forming area 10 is located in the middle of the thin-walled material 1 as much as possible.

[0024] In addition, the clamps mentioned above include multiple pressure plates or multiple suction cups, or the clamps mentioned above can also be formed by a combination of multiple pressure plates and multiple suction cups. Multiple pressure plates or multiple suction cups can achieve multi-point clamping of the auxiliary area 11 in the thin-walled material 1, improve the uniformity of the clamping point distribution, and reduce the deformation of the thin-walled material 1 during processing.

[0025] In step S4, the thin-walled connecting strip 12 can be manually cut to separate the attached area 11 from the target product 2; alternatively, it can be stamped and cut by a cutting device adapted to the contour of the thin-walled connecting strip 12.

[0026] In the above embodiments, the thickness of the thin-walled connecting strip 12 varies depending on the material of the thin-walled material 1. For example, when the strength and hardness of the thin-walled material 1 are high, the thickness of the thin-walled connecting strip 12 can be appropriately reduced, while when the strength and hardness of the thin-walled material 1 are low, the thickness of the thin-walled connecting strip 12 can be appropriately increased. Generally, for different materials of the thin-walled material 1, the thickness of the thin-walled connecting strip 12 is usually in the range of 0.1 mm to 0.4 mm.

[0027] In addition, in some embodiments, in order to facilitate manual cutting of the thin-walled connecting strip 12, when processing the thin-walled connecting strip 12, the thin-walled connecting strip 12 can be partially extended to the edge of the thin-walled material 1 by using a milling cutter or other cutting tool. However, in this process, the milling cutter or other cutting tool must be prevented from interfering with the fixture.

[0028] After step S4 is completed, the outer peripheral contour of the target product 2 can be further refined by grinding and / or trimming.

[0029] When the length and width dimensions of the selected thin-walled material 1 are close to or exceed 1m, the target product 2 being processed is a medium-to-large-sized thin-walled part. Therefore, in some embodiments, step S3 includes the following sub-steps: S30. Use a large-diameter milling cutter to mill around the outer contour of the target product 2, so that the thickness of the milled area is 0.5mm to 1mm; use a large-diameter milling cutter at low speed and low feed rate to rough mill and remove most of the blank material, so as to achieve rapid removal of most of the blank material. S31. Use a small-diameter milling cutter to mill the milling area layer by layer until a thin-walled connecting band 12 with a thickness of 0.1 mm to 0.4 mm is formed.

[0030] The above-mentioned multiple milling method can avoid deformation and damage of the thin-walled connecting strip 12 during the milling process, and ensure the accuracy of milling positioning.

[0031] In step S31, the thickness of a single layer in the layer-by-layer milling is 0.1 mm. For example, in the layer-by-layer milling process, the diameter of the milling cutter can be between 4 mm and 6 mm, and the feed rate can be between 1800 mm / min and 2500 mm / min.

[0032] As mentioned earlier, the thickness of the thin-walled connecting strip 12 is related to the material of the thin-walled material 1. In addition, the thickness of the thin-walled connecting strip 12 is also related to the type of clamp, for example: When the thin-walled material 1 is an aluminum alloy part, the thickness of the thin-walled connecting strip 12 is 0.2mm to 0.3mm. At the same time, if the fixture uses multiple pressure plates, the thickness of the thin-walled connecting strip 12 can be appropriately reduced, for example, the thickness of the thin-walled connecting strip 12 is 0.2mm.

[0033] When the thin-walled material 1 is an aluminum alloy part, if the fixture uses multiple vacuum chucks, the thickness of the thin-walled connecting strip 12 is 0.2mm to 0.3mm.

[0034] Furthermore, compared to thin-walled material 1 using aluminum alloy parts, when thin-walled material 1 uses non-metallic materials (such as polyoxymethylene plastic), the thickness of thin-walled connecting strip 12 should be appropriately increased; for example, the thickness of thin-walled connecting strip 12 is 0.4 mm.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for machining irregular thin-walled parts, characterized in that, Includes the following steps: S1. Processing a thin-walled material into a regular shape, wherein the thin-walled material has a forming area for forming a target product and an auxiliary area located around the forming area; S2. Use a fixture to clamp the auxiliary area and complete the processing of the target product in the forming area; S3. Mill the thin-walled material around the outer contour line of the target product to form a set of thin-walled connecting strips that wrap around the outer periphery of the target product in the attached area; S4. Remove the thin-walled material from the fixture and cut it along the thin-walled connecting strip with a cutting tool to separate the attached area from the target product.

2. The processing method for irregular thin-walled parts according to claim 1, characterized in that, Step S3 includes the following sub-steps: Milling is performed around the outer contour of the target product using a large-diameter milling cutter, so that the thickness of the milled area is 0.5 mm to 1 mm. The milling area is milled layer by layer using a milling cutter with a smaller diameter until the thin-walled connecting strip with a thickness of 0.1 mm to 0.4 mm is formed.

3. The processing method for irregular thin-walled parts according to claim 2, characterized in that, The thickness parameter for a single layer in the layer-by-layer milling process is 0.1 mm.

4. The processing method for irregular thin-walled parts according to claim 2 or 3, characterized in that, The clamp includes multiple vacuum suction cups or pressure plates; In step S2, multiple vacuum suction cups or pressure plates are evenly clamped onto the auxiliary area.

5. The processing method for irregular thin-walled parts according to claim 4, characterized in that, When the thin-walled material is an aluminum alloy part, the thickness of the thin-walled connecting strip is 0.2 mm to 0.3 mm.

6. The processing method for irregular thin-walled parts according to claim 5, characterized in that, When the fixture uses multiple pressure plates, the thickness of the thin-walled connecting strip is 0.2 mm.

7. The processing method for irregular thin-walled parts according to claim 5, characterized in that, When the fixture employs multiple vacuum suction cups, the thickness of the thin-walled connecting strip is 0.2 mm to 0.3 mm.

8. The processing method for irregular thin-walled parts according to claim 4, characterized in that, When the thin-walled part is made of polyoxymethylene plastic, the thickness of the thin-walled connecting strip is 0.4 mm.

9. The processing method for irregular thin-walled parts according to claim 1, characterized in that, In step S4, the thin-walled connecting strip is manually cut to separate the attached area from the target product.

10. The processing method for irregular thin-walled parts according to claim 1, characterized in that, In step S1, the regular shape includes a rectangle or a circle, wherein the forming area is located in the middle of the thin-walled material.

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