Method and device for removing punching waste sheet

Abstract

The invention discloses a method and device for removing punching waste pieces, and the method comprises the following steps: S1, clamping a tubular workpiece on a rack, and enabling the waste pieces at the two opposite ends of the tubular workpiece to be opposite to push blocks at the tail ends of two air cylinders; and S2, the two air cylinders move synchronously, push blocks on the two air cylinders make contact with the two waste pieces at the same time, and the waste pieces are pushed off from the tubular workpiece. According to the method and the device for removing the punching waste pieces, the waste pieces adhered to the tubular workpiece can be conveniently removed, and the labor intensity of workers is reduced; through the synchronous action of the two air cylinders, the working efficiency is improved, and meanwhile, the interaction force between the tubular workpiece and the rack is reduced; and furthermore, energy waste is avoided by calculating the inner diameter of the piston of the air cylinder.

Description

Technical Field

[0001] This invention relates to the field of automotive pipe processing equipment technology, and in particular to a method and apparatus for removing punched waste sheets. Background Technology

[0002] Existing hydraulic fittings, such as the front crossbeam of a vehicle frame, require punching holes in the surface of the tubular workpiece after forming. During the punching process, scrap pieces (such as...) adhere to the hole. Figure 5 Currently, these waste pieces are removed manually, which is labor-intensive and cannot guarantee that operators will remove the waste pieces from every tubular workpiece. If not detected, the tubular workpieces with waste pieces will flow out and later fall into the frame, causing abnormal noise.

[0003] A search revealed that Chinese patent application number CN202222389672.9, entitled "A Pipe Stamping Die," discloses a method of sliding an ejector rod at one end inside the pipe die, which can eject and collect metal scraps inside the die. The shortcoming of this patent is that the ejector rod is used to eject scrap that has already detached from the pipe. If the scrap has not detached from the pipe, the ejector rod may cause the pipe to move. Summary of the Invention

[0004] To address the technical problems existing in the background art, the present invention proposes a method and apparatus for removing punching waste sheets.

[0005] The present invention provides a method for removing punching waste sheets, comprising the following steps:

[0006] S1. Clamp the tubular workpiece on the frame so that the scrap pieces at opposite ends of the tubular workpiece are opposite to the push blocks at the ends of the two cylinders.

[0007] S2. The two cylinders move synchronously, causing the push blocks on the two cylinders to contact the two scrap pieces at the same time, and pushing the scrap pieces off the tubular workpiece.

[0008] As a further optimization of the present invention, the minimum diameter of the piston inside the cylinder is D. min = Where A is the piston area, and D is... min The unit is mm, and the unit of A is mm. 2 ;

[0009] A≥F / (P×η), where P is the working air pressure in MPa; η is the cylinder efficiency; and F is the cylinder thrust required in N.

[0010] F = F1 × b; where b is the safety factor; F1 is the shear force experienced when the waste piece is cut.

[0011] As a further optimized scheme of the present application, F1=τ× A0; τ is the shear strength of the material, with the unit of Mpa; A0is the connecting area of the waste piece and the tubular workpiece, with the unit of mm 2 ;

[0012] A0= L×δ, wherein, L is the connecting length, with the unit of mm; δ is the connecting thickness, with the unit of mm.

[0013] As a further optimized scheme of the present application, the contact position of the push block and the waste piece is lower than the connecting position of the waste piece and the tubular workpiece.

[0014] As a further optimized scheme of the present application, the side opposite to the waste piece of the push block is provided with a spherical groove, so that the thickness of the front end edge of the push block gradually increases from the end close to the waste piece to the end away from the waste piece.

[0015] A device for removing punched waste pieces, comprising a rack, wherein a first air cylinder and a second air cylinder opposite to the first air cylinder are arranged on the rack, and a push block is arranged at the end of the first air cylinder and the second air cylinder;

[0016] A clamping space is formed between the push blocks of the first air cylinder and the second air cylinder, and a clamping assembly is arranged in the clamping space, which is used for clamping the side of the tubular workpiece.

[0017] As a further optimized scheme of the present application, the clamping assembly comprises a fixed clamping plate and a movable clamping plate arranged on the rack for clamping the tubular workpiece, the movable clamping plate is arranged in parallel and opposite to the fixed clamping plate, the distance between the movable clamping plate and the fixed clamping plate can be adjusted, and the middle part of the tubular workpiece is located between the fixed clamping plate and the movable clamping plate.

[0018] As a further optimized scheme of the present application, a limiting column is arranged on the movable clamping plate and / or the fixed clamping plate, a limiting hole is arranged on the tubular workpiece, the limiting column is located in the limiting hole, and an axial movable interval is formed between the limiting hole and the limiting column.

[0019] As a further optimized scheme of the present application, a pre-pressing plate is transversely rotatably arranged on the rack, which is used for pre-positioning the tubular workpiece from above.

[0020] A pressing block is arranged on the rack through a lifting member, and the pressing force of the pressing block on the tubular workpiece is greater than the pressing force of the pre-pressing plate on the tubular workpiece.

[0021] As a further optimized scheme of the present application, an auxiliary support is arranged on the rack, and the auxiliary support has a receiving groove for receiving the end of the tubular workpiece.

[0022] The method and apparatus for removing punching waste sheets proposed in this invention facilitate the removal of waste sheets adhering to tubular workpieces, reducing manual labor intensity; and while increasing work efficiency through the synchronous action of two cylinders, it reduces the interaction force between the tubular workpiece and the machine frame; furthermore, by calculating the piston inner diameter of the cylinders, energy waste is avoided.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a partial enlarged view of the limiting post of the present invention;

[0026] Figure 3 This is a schematic diagram of the pusher block structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the force simulation of the L-shaped support frame of the present invention;

[0028] Figure 5 This is a schematic diagram of the connection structure between the waste sheet and the tubular workpiece of the present invention;

[0029] In the diagram: 1. Frame; 2. Tubular workpiece; 20. Limiting hole; 3. First cylinder; 4. Second cylinder; 5. L-shaped support frame; 6. Push block; 60. Spherical groove; 7. Fixed clamping plate; 8. Movable clamping plate; 9. Telescopic component; 10. Limiting post; 11. Pre-pressure plate; 12. Lifting component; 13. Pressing block; 14. Auxiliary support. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] like Figures 1-2 As shown Figures 1-3 The device shown includes a frame 1, on which a first cylinder 3 and a second cylinder 4 opposite to the first cylinder 3 are provided. Push blocks 6 are provided at the ends of both the first cylinder 3 and the second cylinder 4.

[0032] A clamping space is formed between the push blocks 6 of the first cylinder 3 and the second cylinder 4. A clamping assembly is installed within this space to clamp the sides of the tubular workpiece 2. After the clamping assembly clamps the tubular workpiece, the first cylinder 3 and the second cylinder 4 simultaneously impact the scrap pieces at both ends of the tubular workpiece to achieve impact on the scrap pieces inside 2. Furthermore, the first cylinder 3 and the second cylinder 4 simultaneously press the two scrap pieces on the tubular workpiece 2, thereby canceling out the force acting on the tubular workpiece 2 and preventing displacement of the tubular workpiece 2 relative to the frame 1.

[0033] Specifically, an L-shaped support frame 5 is bolted to the frame 1. The inner side of the L-shaped support frame 5 has reinforcing ribs. There are two sets of L-shaped support frames 5: a first cylinder 3 is mounted on one L-shaped support frame 5, and a second cylinder 4 is mounted on the other L-shaped support frame 5. Figure 4 The force analysis of the L-shaped support frame 5 shown can fully support the operation of the first cylinder 3 and the second cylinder 4.

[0034] Preferably, the fixture includes a fixed clamping plate 7 and a movable clamping plate 8 mounted on the frame 1 for clamping the tubular workpiece 2. The movable clamping plate 8 is parallel to and opposite to the fixed clamping plate 7, and the distance between the movable clamping plate 8 and the fixed clamping plate 7 is adjustable. The middle part of the tubular workpiece 2 is located between the fixed clamping plate 7 and the movable clamping plate 8. The movable clamping plate 8 is mounted on the frame 1 via a telescopic member 9, which is used to drive the movable clamping plate 8 to move horizontally, thereby clamping or releasing the tubular workpiece 2. It should be noted that the telescopic member 9 can be a structure such as a cylinder in the prior art that can drive the component to move horizontally.

[0035] Preferably, the movable clamping plate 8 and the fixed clamping plate 7 are provided with limiting posts 10, and the tubular workpiece 2 is provided with limiting holes 20. The limiting posts 10 are located in the limiting holes 20 and an axial movable interval is formed between the limiting holes 20 and the limiting posts 10. The setting of the limiting posts 10 and the limiting holes 20 limits the adjustment displacement of the tubular workpiece 2 relative to the frame 1 along the axial direction of the tubular workpiece 2. The setting of the limiting posts 10 can realize the detection of whether the upper limit hole 20 of the tubular workpiece is open.

[0036] Preferably, a pre-pressure plate 11 is rotatably mounted on the frame 1. The pre-pressure plate 11 is used for pre-positioning the tubular workpiece 2 above. With the pre-pressure plate 11 in place, the tubular workpiece 2 can still move relative to the frame 1 in the plane to adjust the position of the tubular workpiece 2 relative to the frame 1.

[0037] A clamping block 13 is installed on the frame 1 via a lifting component 12. When the pressure of the clamping block 13 on the tubular workpiece 2 is greater than the pressure of the pre-pressing plate 11 on the tubular workpiece 2, the lifting component 12 can be a structure such as a cylinder that can drive the clamping block 13 to move in the vertical direction. After the clamping block 13 clamps the tubular workpiece 2, it is difficult to drive the tubular workpiece 2 to move in the horizontal plane even with a large external force.

[0038] Preferably, in order to achieve better support and ensure accuracy even when the length of the tubular workpiece 2 is relatively large, an auxiliary support 14 is provided on the frame 1. The auxiliary support 14 has a receiving groove for receiving the end of the tubular workpiece 2.

[0039] The process of removing punching waste sheets using the above-mentioned device includes the following steps:

[0040] S1, including clamping the tubular workpiece 2 on the frame 1, so that the waste pieces at opposite ends of the tubular workpiece 2 are opposite to the push blocks 6 at the ends of the two cylinders;

[0041] Specifically, firstly, the tubular workpiece 2 is placed on the support plate of the fixture. The two sides of the support plate are a fixed clamping plate 7 and a movable clamping plate 8. The limiting post 10 on one side of the fixed clamping plate 7 is inserted into the limiting hole 20 of the tubular workpiece 2. Then, the pre-pressing plate 11 is rotated so that the pre-pressing plate 11 presses down on the tubular workpiece 2 under the action of gravity, and the limiting post 10 initially limits the position of the tubular workpiece 2. Then, the position of the tubular workpiece 2 is adjusted so that the distance from the two scrap pieces on the tubular workpiece 2 to the two push blocks 6 is equal. Then, the movable clamping plate 8 is moved closer to the fixed clamping plate 7 by the telescopic member 9 and clamps the side of the tubular part. Then, the pressing block 13 is moved downward by the lifting member 12 and presses the top of the tubular workpiece 2.

[0042] S2. The two cylinders move synchronously and the push blocks 6 on the two cylinders (i.e., the first cylinder 3 and the second cylinder 4) simultaneously contact the two scrap pieces and push the scrap pieces off the tubular workpiece 2. During this process, by adjusting the position of the tubular workpiece 2, we can try to ensure that the push blocks 6 of the two cylinders push out the scrap pieces at the same time, so that the force of the cylinders on the tubular workpiece 2 cancels out, reducing the interaction force between the tubular workpiece 2 and the frame 1 and the clamping block, ensuring the processing accuracy, and at the same time facilitating the separation of the scrap pieces from the tubular workpiece 2.

[0043] To avoid wasting cylinder energy, the minimum diameter of the piston inside the cylinder is D. min = Where A is the piston area, and D is... min The unit is mm, and the unit of A is mm. 2 ;

[0044] A≥F / (P×η), where P is the working air pressure, P is the standard industrial air pressure of 0.6 MPa, and the unit is MPa; η is the cylinder efficiency, η=0.8 (considering friction loss); F is the cylinder thrust required, and the unit is N;

[0045] F = F1 × b; where b is the safety factor; F1 is the shear force experienced when the waste piece is cut, and in this embodiment, b is taken as 6.

[0046] As a further optimization of the present invention, F1 = τ × A0; τ is the shear strength of the material, in MPa; A0 is the connection area between the waste sheet and the tubular workpiece 2, in mm. 2 ;

[0047] A0 = L × δ, where, as Figure 5 As shown, L is the connection length in mm; δ is the connection thickness between the scrap sheet and the tubular workpiece 2, i.e., the scrap sheet thickness in mm.

[0048] Ensure that the push block 6 processes the waste sheet, and the contact position between the push block 6 and the waste sheet is lower than the connection position between the waste block and the tubular workpiece 2.

[0049] To facilitate the stamping of the scrap sheet and ensure that the scrap sheet can be moved to a specific position on the tubular component, such as... Figure 3 Preferably, the push block 6 has a spherical groove 60 on the side opposite to the waste sheet, so that the thickness of the front edge of the push block 6 gradually increases from the end closer to the waste sheet to the end farther away from the waste sheet. The spherical groove 60 can accommodate the waste sheet. During the high-speed movement of the push block 6 and the waste sheet, the waste sheet will not detach from the spherical groove 60. When the cylinder stops, the waste sheet will detach from the push block 6, ensuring that the waste sheet moves to a specific position inside the tubular workpiece 2 after it rushes down. This feature allows an elastic pad to be laid inside the tubular workpiece 2 to receive the sheet material, avoiding damage to the inner wall of the tubular component by the waste sheet.

[0050] 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 the present 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 the present invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "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, an electrical connection, or a connection that allows communication between the components; 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.

[0053] 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.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method of removing a punched scrap piece, characterized by, Includes the following steps: S1. Clamp the tubular workpiece (2) on the frame (1) so that the scrap pieces at both ends of the tubular workpiece (2) are opposite to the push blocks (6) at the ends of the two cylinders. S2, the two cylinders move synchronously and the push blocks (6) on the two cylinders simultaneously contact the two scrap pieces and push the scrap pieces off the tubular workpiece (2).

2. The method of removing punched scrap pieces according to claim 1, wherein, The minimum diameter of the cylinder inside the piston is D min = ; wherein A is the piston area, wherein D min is in mm and A is in mm 2 ; A≥F / (P×η), where P is the working air pressure in MPa; η is the cylinder efficiency; and F is the cylinder thrust required in N. F = F1 × b; where b is the safety factor; F1 is the shear force experienced when the waste piece is cut.

3. The method of removing punched scrap pieces according to claim 2, wherein, F1 = τ x A0; τ is the shear strength of the material, in units of Mpa; A0is the connecting area of the waste piece and the tubular workpiece (2), in units of mm 2 ; A0 = L × δ, where L is the connection length in mm and δ is the connection thickness in mm.

4. The method of removing punched scrap pieces according to claim 1, wherein, The contact position between the pusher block (6) and the waste sheet is lower than the connection position between the waste block and the tubular workpiece (2).

5. The method of removing punched scrap pieces according to claim 1, wherein, The pusher (6) has a spherical groove (60) on the side opposite to the waste sheet, so that the thickness of the front edge of the pusher (6) gradually increases from the end closer to the waste sheet to the end farther away from the waste sheet.

6. An apparatus for removing punched scrap pieces, characterized by Includes a frame (1), on which a first cylinder (3) and a second cylinder (4) opposite to the first cylinder (3) are provided, and push blocks (6) are provided at the ends of the first cylinder (3) and the second cylinder (4); A clamping space is formed between the push block (6) of the first cylinder (3) and the second cylinder (4), and a clamping assembly is provided in the clamping space for clamping the side of the tubular workpiece.

7. The apparatus for removing punched scrap pieces according to claim 6, wherein The clamping assembly includes a fixed clamping plate (7) and a movable clamping plate (8) mounted on the frame (1) for clamping a tubular workpiece (2). The movable clamping plate (8) is parallel to and opposite to the fixed clamping plate (7). The distance between the movable clamping plate (8) and the fixed clamping plate (7) is adjustable. The middle part of the tubular workpiece (2) is located between the fixed clamping plate (7) and the movable clamping plate (8).

8. The apparatus for removing punched scrap pieces according to claim 7, wherein The movable clamping plate (8) and / or the fixed clamping plate (7) are provided with limiting posts (10), and the tubular workpiece (2) is provided with limiting holes (20). The limiting posts (10) are located in the limiting holes (20) and an axial movable interval is formed between the limiting holes (20) and the limiting posts (10).

9. The apparatus for removing punched scrap pieces according to claim 8, wherein A pre-pressure plate (11) is rotatably mounted on the frame (1), and the pre-pressure plate (11) is used for pre-positioning the tubular workpiece (2) above. A clamping block (13) is installed on the frame (1) via a lifting component (12). The pressure of the clamping block (13) on the tubular workpiece (2) is greater than the pressure of the pre-pressing plate (11) on the tubular workpiece (2).

10. The apparatus for removing punching waste sheets according to claim 7, characterized in that, The frame (1) is provided with an auxiliary support (14), which has a receiving groove for receiving the end of the supporting tubular workpiece (2).

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