Free bending linkage bending device and method with semicircular liner

Abstract

The present invention discloses a free-bending linkage bending device and method with a semicircular liner, and relates to the technical field of three-dimensional free bending of pipes. The device includes a bending component for bending the pipe and a pushing component for pushing the pipe to achieve feeding; the bending component includes a ball seat, and a semicircular ceramic liner bending die is matched on the ball seat, and the upper and lower seats are connected to a servo motor group for driving the upper and lower seats to move up and down and left and right. A guide mechanism for guiding the pipe is provided on one side of the feeding of the semicircular ceramic liner bending die, and the guide mechanism is arranged on a fixed frame, and a sliding surface is provided on one side of the fixed frame to facilitate the movement of the upper and lower seats. The present invention rotates the bending die so that the liner is located on the outside of the complex component forming pipe, and the liner fits the pipe, and the two ends of the liner constrain the pipe. It ensures that the neutral layer of the pipe is effectively constrained, thereby improving the forming accuracy of the pipe and effectively reducing the forming defects.

Description

Technical Field

[0001] The invention belongs to the technical field of three-dimensional free bending of pipes, and in particular relates to a free-bending linkage bending device and method with a semicircular liner. Background Art

[0002] Thin-walled bent pipe components are widely used in load-bearing components of vehicles, ships, engineering machinery, aerospace equipment, buildings and other fields. Bent pipe components are a type of "blood vessel-like" components with large quantity, wide range and compact structure. The conduits with complex spatial three-dimensional configuration have the advantages of reducing the number of conduit joints, reducing the weight of the pipeline system, and improving the reliability of the system. They have great application potential in the aerospace, engineering machinery and other industrial fields. Such conduit components can serve under high temperature, high pressure and complex load environments, and are subjected to strong vibration, stress corrosion and mechanical damage for a long time. Once they fail, they are very likely to cause accident symptoms or grade accidents, seriously affecting the service and safety performance of engineering equipment. Therefore, the research and development and precise forming and manufacturing of high-performance and reliable piping systems have become one of the core links and key technologies in the development process of industrial equipment.

[0003] Free bending forming is a technology for fast bending forming of complex tubes in space. As a typical flexible forming technology based on die trajectory control, the three-dimensional free bending forming technology applies a continuously changing vector torque to the metal tube through a multi-axis forming system, pushes the tube by a push rod, and the tube section is stabilized by a clamping mechanism and pushed to the bending die. The tube is formed by the torque applied by the bending die. This technology does not need to frequently replace the bending die to adapt to the change of the bending radius of the tube, and has significant advantages in the integral forming of a series of complex duct components with three-dimensional spatial configurations required for aviation equipment. In the free bending forming process, the tube is placed on the clamping mechanism and clamped by a cylinder to prevent axial instability due to excessive thrust during the tube forming process. During the forming process, the propulsion mechanism pushes the tube axis to feed, and passes through the guide mechanism and the bending die in turn. Driven by the horizontal and vertical motors, the bending die can move within the space range and form a bend with a variable bending radius and bending angle. The three-dimensional free bending system for complex components can achieve high-precision die-free forming of pipes, profiles, and wires under various bending radius conditions, which poses a huge challenge to traditional metal bending forming technology and is recognized as an important technological innovation in the field of plastic forming. Among them, in the three-dimensional free bending forming system, there is a large gap between the bending die and the pipe. When the pipe is formed, there is a large ovality in the direction perpendicular to the bending direction of the pipe. There is a large gap between the liner and the pipe. The part perpendicular to the bending direction of the pipe is not constrained, resulting in an increase in the ovality of the pipe, reducing the high-precision forming of free bending forming, and limiting the development and expansion of three-dimensional free bending forming technology in the field of high-precision forming. Summary of the invention

[0004] The object of the present invention is to provide a free-bending linkage bending device and method with a semicircular liner to solve the problems in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A free-bending linkage bending device with a semicircular liner comprises a bending component for bending a pipe and a pushing component for pushing the pipe to achieve feeding;

[0007] The bending component includes a ball seat, a semicircular ceramic lining bending die is matched on the ball seat, the upper and lower seats are connected to a servo motor group for driving the upper and lower seats to move left and right, and a guide mechanism for guiding the pipe is provided on one side of the feeding of the semicircular ceramic lining bending die, and the guide mechanism is arranged on a fixed frame, and a sliding surface is provided on one side of the fixed frame to facilitate the movement of the upper and lower seats;

[0008] Semicircular ceramic lined bending die, the outside is a bending die, and the inside is filled with a semicircular ceramic liner, the diameter fits the pipe, the gap is 0.1mm, and the bending die matches the spherical bearing on the ball seat;

[0009] The bending die is connected to a bending die rotating module for driving the bending die to rotate. The bending die rotating module enables the bending die to rotate in the axial direction of the tube. The bending die rotating module always remains perpendicular to the bending die.

[0010] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0011] In an optional solution: the head shape of the semicircular ceramic liner is semicircular, which applies constraints in the bending direction of the vertical pipe and reduces the thrust of the pushing component on the pipe. The semicircular ceramic liner is made of ceramic material.

[0012] In an optional solution: a positioning pin for limiting the rotation of the semicircular ceramic liner is provided on the inner side of the bending mold.

[0013] In the optional solution: the diameter of the positioning pin is 5 mm, the material used is T10A, the sharp corners are blunted, and anti-rust treatment is performed.

[0014] In an optional solution: the bending mold rotation module includes a bending mold gear arranged at the tail of the bending mold, the outer side of the bending mold gear is meshed with the driving gear, the driving gear is connected to a rotating motor for driving it to rotate, the base of the rotating motor is fixedly connected to the ball seat, and the bending mold rotation module always remains perpendicular to the bending mold.

[0015] In the optional scheme: the rotating motor adopts Yaskawa ∑II series high-speed response servo motor (SGMGH), model 05AA, with a rated power of 450W and a reducer with a reduction ratio of 3:1. The rated torque of the motor is 2.84N·m, and the rotational inertia moment is 0.000724kgm2.

[0016] In an optional solution: the pushing component includes a pressing mechanism for binding the outside of the pipe and a propulsion mechanism for pushing the end of the pipe.

[0017] In an optional scheme: the clamping mechanism includes a lower clamping assembly and an upper clamping assembly, the lower clamping assembly is connected to the support seat, and its upper end cooperates with the upper clamping assembly, a first guide groove is opened on the surface of the upper clamping assembly, and a second guide groove is opened on the surface of the lower clamping assembly, the first guide groove and the second guide groove are closed to form a clamping groove hole that cooperates with the pipe, and the upper clamping assembly is connected to a connecting rod mechanism that is used to drive it to be in close contact with the lower clamping assembly.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention rotates the bending die so that the liner is located on the outside of the complex component forming pipe, the liner fits the pipe, and the two ends of the liner constrain the pipe. This ensures that the neutral layer of the pipe is effectively constrained, thereby improving the pipe forming accuracy and effectively reducing forming defects. Under the propulsion of the propulsion device, the bending die rotates during the pipe forming process so that the liner is always on the outside of the formed pipe. This technical solution improves the forming accuracy and forming quality of the three-dimensional free bending forming equipment for pipes, develops the potential of existing three-dimensional free bending forming equipment, and thus improves the forming capacity and forming efficiency of the equipment to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the three-dimensional free bending forming device of the present invention;

[0021] Figure 2 It is a schematic structural diagram of a bending die forming device of a three-dimensional free bending forming device of the present invention;

[0022] Figure 3 It is a schematic structural diagram of a bending die rotating module of a three-dimensional free bending forming device of the present invention;

[0023] Figure 4 It is a schematic cross-sectional view of the position of the inner lining of the bending die of the three-dimensional free bending forming device of the present invention.

[0024] Notes on figure numbers: . DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] In one embodiment, Figure 1-Figure 4 As shown, the free-bending linkage bending device with a semicircular liner includes a bending component for bending the pipe 8 and a pushing component for pushing the pipe 8 to achieve feeding;

[0027] The bending component includes a ball seat 4, a semicircular ceramic lining bending die 5 is provided in the middle of the ball seat 4, and the upper and lower seats 1 are connected to a servo motor group 2 for driving the upper and lower seats 1 to move up and down and left and right. Under the action of the servo motor group 2, the upper and lower seats 1 and the ball seat 4 move up and down and left and right, thereby causing the semicircular ceramic lining bending die 5 to deflect, and then cooperate with the pushing of the pushing component to cause the pipe 8 to be bent;

[0028] A guide mechanism 7 for guiding the pipe 8 is provided on one side of the feeding of the semicircular ceramic lining bending die 5, and the guide mechanism 7 is arranged on the fixing frame 3;

[0029] The semicircular ceramic lining bending die 5 has a bending die 5.4 on the outside and a semicircular ceramic lining 5.1 on the inside. The diameter fits the pipe with a gap of 0.1 mm. The bending die 5.4 matches the spherical bearing 5.2 on the ball seat 4.

[0030] A positioning pin 5.6 is provided on the inner side of the bending die 5.4 to limit the rotation of the semicircular ceramic liner 5.1;

[0031] The locating pin 5.6 has a diameter of 5mm and is required to have good wear resistance. The material used is T10A, with blunted corners and rust-proof treatment.

[0032] The bending die 5.4 is connected to a bending die rotating module 6 for driving the bending die 5.4 to rotate in the axial direction of the tube 8. The bending die rotating module 6 is always perpendicular to the bending die 5.4.

[0033] The bending die rotating module 6 comprises a bending die gear 5.5 arranged at the tail of the bending die 5.4, the outer side of the bending die gear 5.5 is meshed with a driving gear 6.1, the driving gear 6.1 is connected to a rotating motor 602 for driving the same, the base of the rotating motor is fixedly connected to the ball seat 4, the driving gear 6.1 is driven to rotate by the rotating motor, and the driving gear 6.1 drives the bending die 5.4 to rotate through the bending die gear 5.5, so that the semicircular ceramic liner 5.1 is kept outside the arc segment of the bending forming pipe, the bending die rotates in the axial direction of the pipe 8, and the bending die rotating module 6 is always kept perpendicular to the bending die 5.4;

[0034] The rotating motor adopts Yaskawa ∑II series high-speed response servo motor (SGMGH), model 05AA. The rated power is 450W, and it is equipped with a reducer with a reduction ratio of 3:1. The rated torque of the motor is 2.84N·m, and the rotational inertia momentum is 0.000724kgm2

[0035] The head shape of the semicircular ceramic liner 5.1 is semicircular, which applies constraints in the bending direction of the vertical pipe 8 while reducing the thrust of the pushing component on the pipe. The semicircular ceramic liner 5.1 is made of ceramic material, which has the advantages of high hardness, high wear resistance and oxidation resistance. The specified flatness and surface finish make the formed pipe have excellent surface quality;

[0036] The pushing component includes a pressing mechanism 11 for restraining the outside of the tube 8 and a pushing mechanism 12 for pushing the end of the tube 8. Under the action of the pushing mechanism 12, the tube 8 will slide smoothly along the pressing mechanism 11. The setting of the pressing mechanism avoids the problem of bending of the tube 8.

[0037] The clamping mechanism 11 includes a lower clamping assembly 9 and an upper clamping assembly 10. The lower clamping assembly 9 is connected to the support seat, and its upper end is matched with the upper clamping assembly 10. The upper clamping assembly 10 has a first guide groove on its surface, and the lower clamping assembly 9 has a second guide groove on its surface. The first guide groove and the second guide groove are closed to form a clamping groove hole matched with the pipe 8. The upper clamping assembly 10 is connected to a connecting rod mechanism for driving it to be in close contact with the lower clamping assembly 9.

[0038] The above embodiment discloses a method for using a free-bending linkage bending device with a semicircular liner, which includes the following steps: S1, the semicircular ceramic liner 5.1 is installed in a bending mold 5, and the semicircular ceramic liner 5.1 is fixed using a positioning pin 5.6;

[0039] S2, judging the first arc segment of the formed pipe, the direction in which the bending die moves, the end with the liner is located outside the first arc segment of the pipe, and the bending die moves with the movement of the ball seat 4 and the upper and lower seats 1;

[0040] S3, loading: prepare the tube 8 to be formed, and lay the tube 8 between the upper pressing block group 10 and the lower pressing block group 9 along its feeding direction;

[0041] S4, check: when performing the first bend, check whether the bending die is located outside the first arc segment of the formed pipe;

[0042] S5, tube forming: the tube 8 is pushed along the Z direction by the pushing mechanism 12, and the upper and lower seats 1 are driven by the servo motor 2 to further actively control the ball seat 4, driving the bending die 5 to rotate and generate a bending moment. Under the action of the ball seat, the bending die 5 bends the tube 8. When performing the second arc segment, the bending die rotating module 6 drives the bending die 5 to rotate, so that the end with the ceramic lining is always located outside the arc of the tube, and finally a three-dimensional free-bending tube forming component is obtained.

[0043] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A semicircular liner free bending linkage bending device, comprising a bending component for bending a pipe (8) and a pushing component for pushing the pipe (8) to achieve feeding; The bending component comprises a ball seat (4), a semicircular ceramic lining bending die (5) is arranged in the middle of the ball seat (4), the upper and lower seats (1) are connected to a servo motor group (2) for driving the upper and lower seats (1) to move up and down and left and right, a guide mechanism (7) for guiding the pipe (8) is arranged on a feeding side of the semicircular ceramic lining bending die (5), and the guide mechanism (7) is arranged on a fixed frame (3), and a sliding surface is arranged on one side of the fixed frame (3) to facilitate the movement of the upper and lower seats (1); It is characterized in that The semicircular ceramic lining bending die (5) has a bending die (5.4) on the outside and a semicircular ceramic lining (5.1) on the inside. The diameter fits the pipe with a gap of 0.1 mm. The bending die (5.4) matches the spherical bearing (5.2) on the ball seat (4). The positioning sleeve (5.3) at the front end of the guide mechanism (7) corresponds to the feed port of the bending die (5.4); The bending die (5.4) is connected to a bending die rotating module (6) for driving the bending die rotating module (6) to rotate. The bending die rotating module (6) enables the bending die (5.4) to rotate in the axial direction of the pipe (8). The bending die rotating module (6) always remains perpendicular to the bending die (5.4).

2. The free-bending linkage bending device with a semicircular liner according to claim 1 is characterized in that: The head of the semicircular ceramic liner (5.1) is semicircular in shape, which reduces the thrust of the pushing component on the pipe while applying constraints in the bending direction of the vertical pipe (8). The semicircular ceramic liner (5.1) is made of ceramic material.

3. The free-bending linkage bending device with a semicircular liner according to claim 2 is characterized in that: A positioning pin (5.6) for limiting the rotation of the semicircular ceramic liner (5.1) is provided on the inner side of the bending die (5.4).

4. The free-bending linkage bending device with a semicircular liner according to claim 3 is characterized in that: The diameter of the positioning pin (5.6) is 5 mm, the material is T10A, the sharp corners are blunted, and anti-rust treatment is performed.

5. The free-bending linkage bending device with a semicircular liner according to claim 3 is characterized in that: The bending die rotating module (6) comprises a bending die gear (55) arranged at the rear of the bending die (5.4); the outer side of the bending die gear (55) is meshed with a driving gear (6.1); the driving gear (6.1) is connected to a rotating motor for driving the bending die rotating module (6) to rotate; the bending die rotating module (6) is always kept perpendicular to the bending die (5.4).

6. The free-bending linkage bending device with a semicircular liner according to claim 5 is characterized in that: The rotating motor adopts Yaskawa ∑II series high-speed response servo motor (6.2), model 05AA, rated power 450W, and is equipped with a reducer with a reduction ratio of 3:

1. The rated torque of the motor is 2.84N·m, and the rotational inertia momentum is 0.000724kgm 2 .

7. The free-bending linkage bending device with a semicircular liner according to claim 5 is characterized in that: The pushing component comprises a pressing mechanism (11) for binding the outside of the pipe (8) and a pushing mechanism (12) for pushing the end of the pipe (8).

8. The free-bending linkage bending device with a semicircular liner according to claim 7 is characterized in that: The clamping mechanism (11) comprises a lower clamping assembly (9) and an upper clamping assembly (10), wherein the lower clamping assembly (9) is connected to a support seat, and its upper end cooperates with the upper clamping assembly (10), a first guide groove is provided on the surface of the upper clamping assembly (10), and a second guide groove is provided on the surface of the lower clamping assembly (9), and the first guide groove and the second guide groove are closed to form a clamping groove hole that cooperates with the pipe (8), and the upper clamping assembly (10) is connected to a connecting rod mechanism for driving it to be in close contact with the lower clamping assembly (9).

9. A method for using the semicircular liner free bending linkage bending device according to claim 8, characterized in that: The following steps are involved: Step 1: The semicircular ceramic lining (5.1) is installed in the bending mold (5.4), and the semicircular ceramic lining (5.1) is fixed using a positioning pin (5.6); Step 2, determining the first arc segment of the formed pipe and the direction in which the bending die moves, the end with the liner is located outside the first arc segment of the pipe, and the bending die moves with the movement of the ball seat (4) and the upper and lower seats (1); Step 3, loading: prepare the pipe (8) to be formed, and lay the pipe (8) between the upper clamping assembly (10) and the lower clamping assembly (9) along its feeding direction; Step 4, check: when performing the first bend, check whether the bending die is located outside the first arc segment of the formed pipe; Step 5, tube forming: the tube (8) is pushed along the Z direction under the action of the pushing mechanism (12), and the upper and lower seats (1) are driven by the servo motor group (2) to further actively control the ball seat (4), driving the bending die (5.4) to rotate and generate a bending moment. Under the action of the ball seat, the bending die (5.4) bends the tube (8) to form a second arc segment, and the bending die rotating module (6) drives the bending die (5.4) to rotate so that the end with the ceramic lining is always located outside the arc of the tube, and finally a three-dimensional free-bending tube forming component is obtained.

Images