Pipe bending machine for bending high-precision products

Abstract

This invention provides a high-precision pipe bending machine for products with varying curvature, comprising a worktable, a clamping mold rotatably mounted on the worktable, and a bending mold hinged to one side of the clamping mold. The bending mold includes several diameter-changing mold segments, with the first diameter-changing mold segment hinged to the clamping mold, and adjacent diameter-changing mold segments hinged to each other, so that the several diameter-changing mold segments are spirally distributed when closed. A pressure mold is movably mounted on the side of the worktable, and the pressure mold is matched to the side of the clamping mold or the diameter-changing mold, so that the pressure mold presses the rod against the side of the clamping mold or the diameter-changing mold. This invention can improve the pass rate of processed rods with varying bending radii and improve the bending accuracy of rods with varying diameters.

Description

Technical Field

[0001] This invention relates to the field of variable curvature pipe bending equipment, and in particular to a pipe bending machine for high-precision products with variable curvature. Background Technology

[0002] Considering the usage conditions, the bending shape of liquid cooling tubes is usually quite complex, and there is a need for processing with varying curvature. The current common practice is to process them using the push-bending function of ordinary tube bending machines. However, this method often lacks precise fitting to the tube shape, resulting in uncontrollable bending accuracy and low product qualification rate. It often requires secondary manual correction in the later stage, which leads to low processing efficiency, yield, and accuracy. Summary of the Invention

[0003] The purpose of this invention is to provide a high-precision bending machine for bending variable curvature products that can improve the pass rate of processed rods with variable bending radius and improve the bending accuracy of rods with variable diameter.

[0004] To solve the above-mentioned technical problems, the present invention provides a pipe bending machine for high-precision products with varying curvature, including a worktable, a clamping mold rotatably disposed on the worktable, and a bending mold hinged to one side of the clamping mold. The bending mold includes several diameter-changing molds, the first diameter-changing mold is hinged to the clamping mold, and adjacent diameter-changing molds are hinged to each other, so that the several diameter-changing molds are spirally distributed when closed. A pressure mold is movably disposed on the side of the worktable, and the pressure mold is matched with the side of the clamping mold or the diameter-changing mold, so that the pressure mold presses the rod against the side of the clamping mold or the diameter-changing mold.

[0005] Furthermore, the clamping mold has a positioning opening on its side, and one end of the rod is engaged in the positioning opening.

[0006] Furthermore, the outer side of the clamping mold has an arc transition section, one end of which extends to the inner side of the positioning port, and the other end matches the first diameter-changing mold, so that one end of the rod is bent along the arc transition section and fits against the side of the first diameter-changing mold.

[0007] Furthermore, both ends of the variable diameter mold have positioning surfaces, and the positioning surface at one end of the first variable diameter mold matches the clamping mold. The positioning surfaces between adjacent variable diameter molds match each other, so that the outer diameter of the bending mold is limited by the positioning surfaces when it is closed.

[0008] Furthermore, the pressing mold has a pressing port on the side near the clamping mold, and a pressing roller is rotatably connected to the pressing port. The pressing roller has an annular groove that matches the rod in the circumferential direction, so that when the rod is bent, it is located on the side of the clamping mold or the diameter-changing mold and between the annular groove.

[0009] Furthermore, a movable groove is provided at the worktable, the mold is moved in the movable groove, and the side of the mold is connected to the mold connecting plate. The mold connecting plate is mounted on the side of the worktable away from the clamping mold via a slide rail, so that the mold connecting plate controls the mold to move along the movable groove.

[0010] Furthermore, a rack is installed on the worktable, and a gear that meshes with the rack is rotatably installed on the mold connecting plate, so that when the gear rotates, the mold connecting plate moves relative to the worktable, and the direction of movement of the mold connecting plate is perpendicular to the rotation axis of the clamping mold.

[0011] Furthermore, a rotary worktable is rotatably provided at the worktable, and the clamping mold is installed at the rotary worktable. The side of the rotary worktable away from the clamping mold is connected to the drive mechanism so that the drive mechanism drives the rotary worktable to rotate.

[0012] Furthermore, the clamping mold and the first diameter-changing mold, as well as adjacent diameter-changing molds, are detachably fitted together.

[0013] Furthermore, the molding connecting plate has an installation groove, the slide rail is installed in the installation groove, and the inner side of the installation groove has a plurality of installation holes corresponding to the slide rail at intervals along the moving direction of the molding connecting plate.

[0014] The beneficial effects of this invention are as follows: When performing variable curvature bending on a rod, one end of the rod is clamped to the clamping mold for positioning. At this time, several variable diameter molds are in an unfolded state. Subsequently, the pressure mold moves towards the clamping mold and pushes the side of the rod, causing the rod to move closer to the outer periphery of the clamping mold. At the same time, the clamping mold begins to rotate, causing the rod to bend along the outer periphery of the clamping mold under the pressing action of the pressure mold. As the rod bends to the first variable diameter mold, the first variable diameter mold rotates and closes to the side of the clamping mold under the pushing action of the pressure mold and the rod. Under the continuous rotation of the clamping mold and the continuous pushing action of the pressure mold, several variable diameter molds rotate and close in sequence, providing support force to the inner side of the bent rod. When the several variable diameter molds close into a spiral structure, the rod is simultaneously bent into a spiral finished product, thereby achieving the purpose of variable curvature bending.

[0015] Meanwhile, as the clamping mold rotates continuously, the pressing mold moves synchronously to the side away from the clamping mold, but maintains the clamping effect on the rod so that the rod is always located between the variable diameter mold and the pressing mold, and the pushing position of the pressing mold is distributed along the spiral structure when several variable diameter molds are closed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a side view of the present invention.

[0018] Figure 3 This is a schematic diagram of the connection between the pressure mold and the pressure mold connecting plate in this invention.

[0019] Figure 4 This is a schematic diagram of the fit between the positioning port and the pressing mold in this invention.

[0020] Figure 5 This is a schematic diagram of the rod bending process of the present invention.

[0021] Figure 6 This is a schematic diagram of the finished product of the rod-shaped pipe of the present invention.

[0022] Reference numerals: 1. Worktable; 11. Moving groove; 2. Clamping mold; 21. Positioning port; 22. Arc transition section; 23. Rotating worktable; 24. Drive mechanism; 3. Bending mold; 31. Variable diameter mold; 32. Positioning surface; 4. Pressing mold; 41. Pressing port; 42. Pressing roller; 43. Annular groove; 44. Pressing mold connecting plate; 45. Slide rail; 46. Rack; 47. Gear; 48. Mounting groove; 49. Mounting hole; 5. Rod. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0024] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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, the above terms should not be construed as limiting this invention.

[0025] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0026] like Figures 1-6The present invention provides a tube bending machine for high-precision products with varying curvature, including a worktable 1, a clamping mold 2 rotatably mounted on the worktable 1, and a bending mold 3 hinged to one side of the clamping mold 2. The bending mold 3 includes several diameter-changing molds 31. The first diameter-changing mold 31 is hinged to the clamping mold 2, and adjacent diameter-changing molds 31 are hinged to each other, so that the several diameter-changing molds 31 are spirally distributed when closed. A pressure mold 4 is movably mounted on the side of the worktable 1. The pressure mold 4 is matched with the side of the clamping mold 2 or the diameter-changing mold 31, so that the pressure mold 4 presses the rod 5 against the side of the clamping mold 2 or the diameter-changing mold 31.

[0027] When performing variable curvature bending on a rod, one end of the rod is clamped to the clamping mold for positioning. At this time, several variable diameter molds are in an unfolded state. Then, the pressure mold moves towards the clamping mold and pushes the side of the rod, causing the rod to move closer to the outer periphery of the clamping mold. Simultaneously, the clamping mold begins to rotate, causing the rod to bend along the outer periphery of the clamping mold under the clamping action of the pressure mold. As the rod bends to the first variable diameter mold, the first variable diameter mold rotates and closes to the side of the clamping mold under the pushing action of the pressure mold and the rod. With the continuous rotation of the clamping mold and the continuous pushing action of the pressure mold, several variable diameter molds rotate and close in sequence, providing support force to the inner side of the bent rod. When the several variable diameter molds close into a spiral structure, the rod is simultaneously bent into a spiral finished product, thus achieving the purpose of variable curvature bending.

[0028] Meanwhile, as the clamping mold rotates continuously, the pressing mold moves synchronously to the side away from the clamping mold, but maintains the clamping effect on the rod so that the rod is always located between the variable diameter mold and the pressing mold, and the pushing position of the pressing mold is distributed along the spiral structure when several variable diameter molds are closed.

[0029] In one embodiment of this solution, the clamping mold 2 and the first diameter-changing mold 31, as well as the adjacent diameter-changing molds 31, are detachably fitted, thereby enabling the quick replacement of the bending curvature of the rod to meet different curvature processing requirements.

[0030] Preferably, the clamping mold 2 has a positioning opening 21 on its side, and one end of the rod 5 is engaged in the positioning opening 21; the outer side of the clamping mold 2 has an arc transition section 22, one end of the arc transition section 22 extends to the inner side of the positioning opening 21, and the other end matches the first diameter changing mold 31, so that one end of the rod 5 is bent along the arc transition section 22 and attached to the side of the first diameter changing mold 31.

[0031] Specifically, the positioning port positions one end of the rod to prevent it from detaching during the bending process. Simultaneously, due to the arc transition section's structure, the rod can be bent along this section as the clamping mold rotates. The arc transition section also supports the inner side of the bent section, forming the initial bend. Furthermore, because the two ends of the arc transition section are respectively matched with the inner side of the positioning port and the diameter-changing mold, the rod can smoothly be bent sequentially along the positioning port, the arc transition section, and the diameter-changing mold. This ensures bending accuracy while also improving the support effect of the clamping mold and the diameter-changing mold on the inner side of the bent rod.

[0032] Preferably, both ends of the variable diameter mold 31 have positioning surfaces 32, and the positioning surface 32 at one end of the first variable diameter mold 31 matches the clamping mold 2, and the positioning surfaces 32 between adjacent variable diameter molds 31 match each other, so that the outer diameter of the bending mold 3 when it is closed is limited by the positioning surfaces 32.

[0033] Specifically, by using the positioning surface to limit the closing position of the variable diameter mold, when the variable diameter mold supports the rod in the closed state, the support position of each variable diameter mold is restricted by the positioning surface, thus avoiding the problem of incorrect curvature of the rod bending pipe. At the same time, when changing different variable diameter molds, the tilt angle and positioning position of the positioning surface can be changed simultaneously to adapt to different curvature requirements.

[0034] Preferably, the pressing mold 4 has a pressing port 41 on the side near the clamping mold 2, and a pressing roller 42 is rotatably connected to the pressing port 41. The pressing roller 42 has an annular groove 43 that matches the rod 5 in the circumferential direction, so that when the rod 5 is bent, it is located between the side of the clamping mold 2 or the variable diameter mold 31 and the annular groove 43.

[0035] Specifically, the pressure roller is installed and avoids gaps through the pressing port, so that the pressure roller can fit against one side of the rod and apply pressure, ensuring the stability of the rod during the bending process and the fitting accuracy between the pressure roller and the clamping mold and the diameter changing mold. The circumferential groove of the pressure roller can limit the radial movement of the rod, preventing the rod from leaving the pressing range of the pressure roller, and further improving the stability of the pressing fit between the pressure roller and the rod.

[0036] The pressure roller is connected to the pressing port through a structure such as a rotating shaft and bearings to ensure stable rotation of the pressure roller and avoid excessive friction between the pressure roller and the rod.

[0037] Preferably, a movable groove 11 is provided at the workbench 1, the mold 4 is moved in the movable groove 11, and the side of the mold 4 is connected to the mold connecting plate 44. The mold connecting plate 44 is movably mounted on the side of the workbench 1 away from the clamping mold 2 via a slide rail 45, so that the mold connecting plate 44 controls the mold 4 to move along the movable groove 11.

[0038] Specifically, the movement of the die is avoided by the moving groove, and since the die connecting plate is located on the side of the worktable away from the clamping die, the upper surface of the worktable only contains the die and the pressure roller structure. This ensures that the various diameter-changing dies will not have structural interference with the others, thus guaranteeing the stable bending process of the rod. The sliding rail movement of the die connecting plate allows the die connecting plate to move the die closer to or away from the clamping die, thereby maintaining the clamping effect on the rod. It also conforms to the spiral structure distribution when several diameter-changing dies are closed.

[0039] In one embodiment of this solution, a rack 46 is installed on the workbench 1, and a gear 47 that meshes with the rack 46 is rotatably provided on the mold connecting plate 44, so that when the gear 47 rotates, the mold connecting plate 44 moves relative to the workbench 1, and the direction of movement of the mold connecting plate 44 is perpendicular to the rotation axis of the clamping mold 2.

[0040] A servo motor is installed at the mold connecting plate, and the output end of the servo motor is connected to the gear so that the servo motor controls the movement of the mold connecting plate through the cooperation of the gear and rack.

[0041] Preferably, a rotating worktable 23 is rotatably provided at the worktable 1, the clamping mold 2 is installed at the rotating worktable 23, and the side of the rotating worktable 23 away from the clamping mold 2 is connected to the drive mechanism 24 so that the drive mechanism 24 drives the rotating worktable 23 to rotate.

[0042] Specifically, the rotary table is controlled to rotate by a drive mechanism, which in turn controls the rotation of the clamping mold to ensure the stability of the clamping mold's rotation.

[0043] The drive mechanism can be a servo motor and a reducer, and ball bearings can be installed at the rotating connection between the rotary table and the worktable.

[0044] Preferably, the molding connecting plate 44 has an installation groove 48, the slide rail 45 is installed in the installation groove 48, and the inner side of the installation groove 48 has a plurality of installation holes 49 corresponding to the slide rail 45 at intervals along the moving direction of the molding connecting plate 44.

[0045] Specifically, each slide rail is connected to the mounting slot through the mounting holes and corresponds to the fixed slider on the back of the worktable, so that the pressure mold connecting plate can move relative to the worktable. At the same time, since there are multiple mounting holes spaced apart along the moving direction of the pressure mold connecting plate, the initial position of the pressure mold connecting plate can be adjusted relative to the slide rail when it is installed at different mounting holes, and then the different clamping strokes can be adjusted according to the different curvature requirements of different rods.

[0046] This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A pipe bending machine for high-precision products with varying curvature, characterized in that: The device includes a workbench (1), a clamping mold (2) rotatably mounted on the workbench (1), and a bending mold (3) hinged to one side of the clamping mold (2). The bending mold (3) includes several variable diameter molds (31). The first variable diameter mold (31) is hinged to the clamping mold (2), and adjacent variable diameter molds (31) are hinged to each other so that the several variable diameter molds (31) are spirally distributed when they are closed. A pressure mold (4) is movably mounted on the side of the workbench (1). The pressure mold (4) is matched with the side of the clamping mold (2) or the variable diameter mold (31) so that the pressure mold (4) presses the rod (5) against the side of the clamping mold (2) or the variable diameter mold (31).

2. The pipe bending machine for high-precision products with varying curvature according to claim 1, characterized in that: The clamping mold (2) has a positioning port (21) on its side, and one end of the rod (5) is engaged in the positioning port (21).

3. The pipe bending machine for high-precision products with varying curvature according to claim 2, characterized in that: The clamping mold (2) has an arc transition section (22) on its outer side. One end of the arc transition section (22) extends to the inner side of the positioning port (21), and the other end matches the first diameter-changing mold (31) so that one end of the rod (5) is bent along the arc transition section (22) and attached to the side of the first diameter-changing mold (31).

4. The pipe bending machine for high-precision products with varying curvature according to claim 1, characterized in that: Both ends of the variable diameter mold (31) have positioning surfaces (32), and the positioning surface (32) at one end of the first variable diameter mold (31) matches the clamping mold (2). The positioning surfaces (32) between adjacent variable diameter molds (31) match each other so that the outer diameter of the bending mold (3) is limited by the positioning surface (32) when it is closed.

5. The pipe bending machine for high-precision products with varying curvature according to claim 1, characterized in that: The pressing mold (4) has a pressing port (41) on the side near the clamping mold (2). A pressing roller (42) is rotatably connected to the pressing port (41), and the pressing roller (42) has an annular groove (43) that matches the rod (5) in the circumferential direction, so that when the rod (5) is bent, it is located between the side of the clamping mold (2) or the variable diameter mold (31) and the annular groove (43).

6. The pipe bending machine for high-precision products with varying curvature according to claim 1, characterized in that: A movable groove (11) is provided at the workbench (1). The mold (4) is moved in the movable groove (11), and the mold (4) is connected to the mold connecting plate (44) on its side. The mold connecting plate (44) is moved on the side of the workbench (1) away from the clamping mold (2) by a slide rail (45) so that the mold connecting plate (44) controls the mold (4) to move along the movable groove (11).

7. The pipe bending machine for high-precision products with varying curvature according to claim 6, characterized in that: A rack (46) is installed on the workbench (1), and a gear (47) that meshes with the rack (46) is rotatably provided on the mold connecting plate (44) so ​​that when the gear (47) rotates, the mold connecting plate (44) moves relative to the workbench (1), and the direction of movement of the mold connecting plate (44) is perpendicular to the rotation axis of the clamping mold (2).

8. The pipe bending machine for high-precision products with varying curvature according to claim 1, characterized in that: A rotating worktable (23) is rotatably provided at the worktable (1), and the clamping mold (2) is installed at the rotating worktable (23). The side of the rotating worktable (23) away from the clamping mold (2) is connected to the drive mechanism (24) so ​​that the drive mechanism (24) drives the rotating worktable (23) to rotate.

9. The pipe bending machine for high-precision products with varying curvature according to claim 1, characterized in that: The clamping mold (2) and the first diameter-changing mold (31), as well as the adjacent diameter-changing molds (31), are detachably fitted.

10. The pipe bending machine for high-precision products with varying curvature according to claim 6, characterized in that: The molding connecting plate (44) has an installation groove (48), the slide rail (45) is installed in the installation groove (48), and the inner side of the installation groove (48) has a plurality of installation holes (49) corresponding to the slide rail (45) at intervals along the moving direction of the molding connecting plate (44).

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