Multi-point incremental forming numerical control support device and numerical control multi-point incremental forming method

Abstract

The plate multi-point incremental forming numerical control supporting device and the numerical control multi-point incremental forming method belong to the device and method of plate processing technology field, and the plate multi-point incremental forming numerical control supporting device comprises a supporting seat, a limiting seat, a numerical control lifting platform, a movable rod, a floating supporting rod and a floating pressure ring. The numerical control multi-point incremental forming method using the plate multi-point incremental forming numerical control supporting device is controlled by a numerical control machine tool, the lifting of the numerical control lifting platform is controlled, the stroke of the numerical control lifting platform is synchronous with the stroke of the overall up-and-down movement of the plate, the plate is on the floating supporting rod, the plate can be in contact with the top of the floating supporting rod before starting processing, a supporting force is generated on the plate in the forming area, the plate is clamped by the two groups of floating pressure rings, the generated forming NC code is input into the numerical control machine tool, the incremental forming processing is carried out, the floating pressure ring, the floating supporting rod and the forming tool head are synchronous in the movement in the processing process, and the support on the plate is always maintained.

Description

Technical Field

[0001] This invention relates to an apparatus and method in the field of sheet metal processing technology, specifically a CNC multi-point progressive forming apparatus and a multi-point progressive forming method for sheet metal. Background Technology

[0002] Incremental sheet metal forming is a method that uses incremental local deformation to obtain parts with desired shapes and performance requirements. This processing method uses a simple-shaped tool moving along a specific trajectory to obtain the corresponding part shape. It can form relatively complex parts without the need for special molds. Compared with traditional stamping methods, it has advantages such as greater flexibility, reduced manufacturing costs of complex molds, and improved material forming performance. Therefore, it is widely used in the production of small batches and parts with special requirements, and is very suitable for the production of small batches and a variety of parts, as well as the trial production of samples.

[0003] Because the flow and stress state of the sheet metal are relatively complex during incremental forming, it is difficult to constrain and control the dimensional accuracy of the formed parts, especially the uniformity of thickness distribution. As a result, the surface quality of the formed parts is generally poor and the geometric error of the sheet metal is relatively large. Summary of the Invention

[0004] The purpose of this invention is to address the deficiencies of the existing technology by providing a CNC support device and a CNC multi-point progressive forming method for sheet metal, thereby improving the reliability of the progressive forming process and enhancing the sheet metal forming performance and forming accuracy.

[0005] The technical solution adopted by this invention to achieve the above objectives is: a CNC support device for multi-point progressive forming of sheet metal, including a support base, a limiting seat, a CNC lifting platform, movable rods, floating support rods, and a floating pressure ring. The support base includes a supporting vertical beam and a supporting horizontal plate. The supporting vertical beam is vertically connected to the worktable surface of the CNC machine tool. The supporting horizontal plate is connected to the upper ends of the two supporting vertical beams. Guide pin holes are provided on both sides of the supporting horizontal plate. Multiple evenly arranged movable rod through holes are provided inside the guide pin holes of the supporting horizontal plate. A limiting seat is fixedly connected to the upper surface of the supporting horizontal plate at the upper edge of each movable rod through hole. A limiting hole extending from the lower end to the upper end is provided in the middle of the limiting seat. The lifting platform is positioned between the CNC machine tool worktable and the support plate. Guide pillars, corresponding to the guide pillar holes on the support plate, are located at both ends of the upper surface of the lifting platform. The guide pillars extend through these holes to the upper surface of the support plate. Each guide pillar has a set of floating pressure rings positioned on it. Between the two guide pillars on the upper surface of the CNC lifting platform are multiple movable rods, corresponding to the movable rod through-holes on the support plate. These movable rods extend through these holes to the limiting holes of the limiting seat. A floating support rod is fixedly connected to the top of each movable rod. The guide pillars, movable rods, and floating support rods can move up and down together with the CNC lifting platform.

[0006] A further technical solution of the present invention is: the edge of the limiting hole is provided with a limiting boss to prevent the floating support rod from moving down excessively.

[0007] A further technical solution of the present invention is that the top end of the floating support rod is arc-shaped.

[0008] Another technical solution adopted by the present invention to achieve the above-mentioned objective is: a CNC multi-point progressive forming method using the above-mentioned CNC support device for multi-point progressive forming of sheet metal, comprising the following steps: (i) installing the above-mentioned CNC support device for multi-point progressive forming of sheet metal on a CNC machine tool, so that the floating support rod and the floating pressure ring can move up and down together with the CNC lifting platform; (ii) The CNC machine tool control system controls the lifting of the CNC lifting platform through the NC program. The stroke of the CNC lifting platform is synchronized with the overall up and down movement of the plate. (III) Three-dimensional modeling: Based on the parameter requirements for plate forming, the CNC code that the CNC machine tool can recognize is generated. (IV) Before placing the plate, each floating support rod is raised to the height of the middle of the floating pressure ring. The plate is placed on the floating support rod so that the plate can contact the top of the floating support rod before processing begins, thus generating a supporting force on the plate in the forming area. (V) The plate to be formed is clamped and fixed between the two sets of floating pressure rings, and the plate is pressed tightly around the edges. (VI) The NC code generated in step (III) is input into the CNC machine tool. The CNC machine tool is operated to start the progressive forming process of the plate part. (VII) During the processing, the floating pressure ring, floating support rod and forming tool head move synchronously in the vertical direction, always maintaining support for the plate until the processing is completed.

[0009] The CNC support device and CNC multi-point progressive forming method for sheet metal of the present invention have the following beneficial effects: The CNC support device for multi-point progressive forming of sheet metal sets multiple floating support rods under the sheet metal to form multi-point support for the sheet metal, which improves the planar stress condition of the sheet metal during the forming process, and makes the stress and strain distribution of the sheet metal during the forming process more uniform and consistent. It has the advantages of improving the reliability of the progressive forming process, improving the forming performance and forming accuracy of the sheet metal.

[0010] The following description, in conjunction with the accompanying drawings and embodiments, further illustrates the CNC support device and CNC multi-point progressive forming method for sheet metal of the present invention. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the multi-point progressive forming CNC support device for sheet metal of the present invention before the sheet metal is formed; Figure 2 This is a schematic diagram of the structure of the multi-point progressive forming CNC support device for sheet metal of the present invention in forming sheet metal; Figure 3This is a schematic diagram of the structure of the multi-point progressive forming CNC support device for sheet metal of the present invention after forming sheet metal; Explanation of the reference numerals: 1-Worktable of CNC machine tool, 2-Supporting vertical beam, 3-Supporting horizontal plate, 4-Guide column, 5-Floating pressure ring, 6-Sheet material, 7-Forming tool head, 8-CNC machine tool spindle, 9-Floating support rod, 10-Moving rod, 11-Limit seat, 12-Limit boss, 13-CNC lifting platform. Detailed Implementation

[0012] like Figures 1 to 3 As shown, the multi-point progressive forming CNC support device for sheet metal of the present invention includes a support base, a limiting seat 11, a CNC lifting platform 13, a movable rod 10, a floating support rod 9, and a floating pressure ring 5. The support base includes a supporting vertical beam 2 and a supporting horizontal plate 3. The supporting vertical beam 2 is vertically connected to the surface of the worktable 1 of the CNC machine tool. The supporting horizontal plate 3 is connected to the upper end of the two supporting vertical beams 2. Guide pin holes are provided on both sides of the supporting horizontal plate 3. Multiple evenly arranged movable rod through holes are provided inside the guide pin holes of the supporting horizontal plate 3. A limiting seat 11 is fixedly connected to the upper surface of the supporting horizontal plate 3 at the upper edge of each movable rod through hole. A limiting hole extending from the lower end to the upper end is provided in the middle of the limiting seat 11. A limiting boss 12 is provided at the edge of the limiting hole to prevent the floating support rod 9 from moving excessively downward.

[0013] A CNC lifting platform 13 is positioned between the CNC machine tool's worktable surface and the supporting horizontal plate 3. Guide pillars 4, corresponding to the positions of guide pillar holes on the supporting horizontal plate 3, are located at both ends of the upper surface of the CNC lifting platform 13. The guide pillars 4 extend through the guide pillar holes to the upper surface of the supporting horizontal plate 3. A set of floating pressure rings 5 ​​are positioned on each guide pillar 4. Multiple movable rods 10, corresponding to the positions of movable rod through holes on the supporting horizontal plate 3, are arranged between the two guide pillars 4 on the upper surface of the CNC lifting platform 13. The top of the floating support rod 9 is arc-shaped. The movable rods 10 extend through the movable rod through holes to the limiting holes of the limiting seat 11. A floating support rod 9 is fixedly connected to the top of each movable rod 10. The guide pillars 4, movable rods 10, and floating support rods 9 can move up and down together with the CNC lifting platform 13. The CNC machine tool is equipped with a drive mechanism (not shown in the figure) to control the up and down movement of the CNC lifting platform 13.

[0014] The present invention employs a CNC multi-point progressive forming method using the aforementioned CNC support device for multi-point progressive forming of sheet metal, comprising the following steps: (I) Installing the aforementioned CNC support device for multi-point progressive forming of sheet metal on a CNC machine tool, so that the floating support rod 9 and the floating pressure ring 5 can move up and down together with the CNC lifting platform 13; (II) The CNC machine tool control system controls the CNC lifting platform 13 to rise and fall through the NC program. The stroke of the CNC lifting platform 13 is synchronized with the overall up and down movement of the plate 6. (III) Three-dimensional modeling: Based on the parameter requirements for forming the plate 6, the CNC code that the CNC machine tool can recognize is generated. (IV) Before placing the plate 6, all floating support rods 9 are raised to the height of the middle of the floating pressure ring 5. The plate 6 is placed on the floating support rod 9 so that the plate 6 can contact the top of the floating support rod 9 before processing begins, thus generating a supporting force on the forming area plate 6. (V) The plate 6 to be formed is clamped and fixed between the two sets of floating pressure rings 5, and the plate 6 is pressed tightly around the edges. (VI) The NC code generated in step (III) is input into the CNC machine tool, and the CNC machine tool is operated to start the progressive forming process of the plate part. (VII) During the processing, the floating pressure ring 5, the floating support rod 9 and the forming tool head 7 move synchronously in the vertical direction, always maintaining support for the plate 6 until the processing is completed. The forming tool head 7 is connected to the end of the CNC machine tool spindle 8.

[0015] The above embodiments are merely preferred embodiments of the present invention. The structure of the present invention is not limited to the forms listed in the above embodiments. Any modifications, equivalent substitutions, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A CNC support device for multi-point progressive forming of sheet metal, characterized in that, The system includes a support base, a limit seat (11), a CNC lifting platform (13), a movable rod (10), a floating support rod (9), and a floating pressure ring (5). The support base includes a support vertical beam (2) and a support horizontal plate (3). The support vertical beam (2) is vertically connected to the surface of the CNC machine tool's worktable (1). The support horizontal plate (3) is connected to the upper ends of the two support vertical beams (2). The support horizontal plate (3) has guide post holes on both sides. The guide post holes of the support horizontal plate (3) have multiple evenly arranged movable rod through holes on the inner side. Each movable rod through hole has a limit seat (11) fixedly connected to the upper surface of the support horizontal plate (3) at its upper edge. The limit seat (11) has a limit hole in the middle that extends from the lower end to the upper end. The CNC lifting platform (13) is located between the surface of the CNC machine tool's worktable and the support horizontal plate (3). The upper surface has guide posts (4) at both ends corresponding to the guide post holes on the support plate (3). The guide posts (4) extend through the guide post holes to the upper surface of the support plate (3). Each guide post (4) has a set of floating pressure rings (5). Between the two guide posts (4) on the upper surface of the CNC lifting platform (13), there are multiple movable rods (10) corresponding to the movable rod through holes on the support plate (3). The movable rods (10) extend through the movable rod through holes to the limiting hole of the limiting seat (11). Each movable rod (10) has a floating support rod (9) fixedly connected to its top end. The guide posts (4), movable rods (10) and floating support rods (9) can move up and down together with the CNC lifting platform (13). The edge of the limiting hole is provided with a limiting boss (12) to prevent the floating support rods (9) from moving down too much.

2. The CNC support device for multi-point progressive forming of sheet metal as described in claim 1, characterized in that, The top of the floating support rod (9) is arc-shaped.

3. A CNC multi-point progressive forming method using the CNC support device for multi-point progressive forming of sheet metal as described in claim 1, characterized in that, Includes the following steps: (i) Install the multi-point progressive forming CNC support device for sheet metal as described in claim 1 on a CNC machine tool, so that the floating support rod (9) and the floating pressure ring (5) can move up and down together with the CNC lifting platform (13); (ii) The CNC machine tool control system controls the CNC lifting platform (13) to rise and fall through the NC program, and the stroke of the CNC lifting platform (13) is synchronized with the stroke of the sheet metal moving up and down as a whole; (iii) 3D modeling, and generate CNC NC code that can be recognized by the CNC machine tool according to the parameter requirements for the forming of sheet metal (6); (iv) Before placing the sheet metal (6), all the floating support rods (9) are raised, and the floating support rods (9) rise to the height of the middle of the floating pressure ring (5), and the sheet metal (6) is placed on the floating support rods (9), so that the sheet metal (6) can be formed before the start of processing. (5) The plate (6) to be formed is clamped and fixed between two sets of floating pressure rings (5), and the plate (6) is pressed with pressure rings around its perimeter; (6) The NC code generated in step (3) is input into the CNC machine tool, the CNC machine tool is operated, and the progressive forming process of the plate (6) part is started; (7) During the processing, the floating pressure rings (5), floating support rods (9) and forming tool head (7) move synchronously in the vertical direction, always maintaining support for the plate (6) until the processing is completed.

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