Heating device for assisting pipe bending, pipe bending device and machining method

Abstract

The invention discloses a heating device assisting in pipe bending, a pipe bending device and a machining method.The heating device assisting in pipe bending comprises a laser heating device, an electromagnetic heating device and a temperature sensor, the laser heating device is arranged at the free end of a mechanical arm, and the electromagnetic heating device is arranged at the free end of the mechanical arm; the laser heating device is used for preheating the to-be-bent part of the pipe; the electromagnetic heating device is arranged at the free end of the mechanical arm, and the electromagnetic heating device is used for conducting auxiliary heating on the to-be-bent part of the preheated pipe; the temperature sensor is arranged at the free end of the mechanical arm, the temperature sensor is used for detecting the temperature of the to-be-bent part of the pipe and feeding back the temperature to the control system, and the control system controls the electromagnetic heating device to work according to the temperature information of the to-be-bent part of the pipe. The precision and quality of pipe bending machining can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe processing, and in particular to a heating device for assisting pipe bending, a pipe bending device and a processing method. Background Art

[0002] Titanium alloys are widely used in aerospace, marine engineering and chemical industries due to their high specific strength, corrosion resistance and excellent high-temperature performance. However, this material has poor plastic deformation ability, especially in the cold bending process, it is prone to cracking, wrinkling, springback and other problems. Due to its high strength, low plasticity, poor thermal conductivity and sensitivity to high-temperature oxidation, titanium alloys are prone to work hardening and uneven stress during cold processing, and are prone to generate oxide layers during high-temperature forming. Therefore, precise temperature control becomes the key to improving its forming quality. In order to solve the processing difficulties encountered in the bending process of titanium alloy tubes, the heating process becomes a key means to optimize the forming quality. Due to the special forming characteristics of titanium alloys, such as high strength, low plasticity, poor thermal conductivity and sensitivity to high-temperature oxidation, the role of heating devices in the forming process is particularly important. However, the existing heating technology generally has the following problems in application: First, the heating area is uneven, resulting in local stress concentration, which is easy to cause cracks, local depressions or excessive deformation; second, it is difficult to maintain temperature stability during the heating process, especially under dynamic processing conditions, heat loss and temperature fluctuations will further weaken the plastic performance and forming accuracy of the material. Summary of the invention

[0003] The purpose of the present invention is to provide a heating device for assisting pipe bending, a pipe bending device and a processing method, so as to solve the problems existing in the above-mentioned prior art and improve the accuracy and quality of pipe bending processing.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a heating device for assisting pipe bending, comprising:

[0006] A laser heating device is arranged at the free end of the robot arm, and is used to preheat the portion of the pipe to be bent;

[0007] An electromagnetic heating device is arranged at the free end of the robot arm, and is used to perform auxiliary heating on the preheated portion of the pipe to be bent;

[0008] The temperature sensor is arranged at the free end of the robot arm, and is used to detect the temperature of the part of the pipe to be bent and feed it back to the control system. The control system controls the operation of the electromagnetic heating device according to the temperature information of the part of the pipe to be bent.

[0009] Preferably, it also includes a switching flange, which is used to be installed on the free end of the robot arm, and the switching flange has a first mounting portion and a second mounting portion, and the first mounting portion is used to install the bending mold; the laser heating device is installed on the second mounting portion, and the electromagnetic heating device and the temperature sensor are installed on the first mounting portion.

[0010] Preferably, the heating end of the electromagnetic heating device is an electromagnetic induction coil, and in the heating state, the electromagnetic induction coil is sleeved on the portion of the pipe to be bent.

[0011] Preferably, the electromagnetic induction coil, the temperature sensor and the bending die are sequentially arranged on the first mounting portion.

[0012] Preferably, the temperature sensor is a contact temperature sensor.

[0013] The present invention also provides a pipe bending device, comprising: a robot, a clamping assembly, a bending die and a heating device for assisting pipe bending as described above; the clamping assembly is used to clamp one end of the pipe, and the other end of the pipe is suspended in the air; the laser heating device, the bending die, the electromagnetic heating device and the temperature sensor are all arranged on the robot's mechanical arm.

[0014] Preferably, it also includes a switching flange, which is used to be installed on the free end of the robot arm, and the switching flange has a first mounting part and a second mounting part, the laser heating device is installed on the second mounting part, and the electromagnetic heating device, the bending mold and the temperature sensor are installed on the first mounting part.

[0015] Preferably, the electromagnetic heating device, the temperature sensor and the bending mold are sequentially mounted on the first mounting portion.

[0016] Preferably, during the laser preheating stage, the clamping assembly can also drive the tube to rotate.

[0017] The present invention also provides a pipe bending method, comprising:

[0018] Preparation steps: Use clamping components to precisely clamp the pipe;

[0019] Preheating step: The robotic arm drives the laser heating device to preheat all the parts to be bent on the pipe in turn;

[0020] Auxiliary heating step: the robot arm drives the electromagnetic heating device to perform auxiliary heating on the preheated pipe to be bent;

[0021] Bending step: the robot arm drives the bending die to bend the part of the pipe to be bent after auxiliary heating;

[0022] When there are multiple parts to be bent, the auxiliary heating step and the bending step are repeated until all the parts to be bent are processed.

[0023] Compared with the prior art, the present invention has achieved the following technical effects:

[0024] The present invention combines laser heating with electromagnetic assisted heating to achieve the purpose of rapid preheating and precise auxiliary heating. Specifically, the laser provides a concentrated and controllable heat source to quickly preheat the pipe, and electromagnetic heating makes up for the lack of dynamic adjustment ability of laser heating technology, thereby effectively avoiding local overheating or cooling problems caused by uneven heat distribution in traditional heating methods. In addition, the control system uses the temperature information fed back by the temperature sensor to flexibly respond to temperature changes during the processing process, ensuring that the temperature of the bending area is always within the optimized range, significantly improving the processing quality.

[0025] In addition, the present invention adopts a switching flange, and integrates the laser heating device for preheating, the electromagnetic heating device for auxiliary heating and processing, and the bending die in the same switching flange. The switching flange is used to switch the positions of the components used in the two processes, which reduces the connection time between the two, reduces heat loss, and improves thermal efficiency. Compared with traditional methods, this integrated design not only reduces energy consumption, but also adapts to the processing needs of titanium alloy pipes of different sizes and complex shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic structural diagram of a heating device for assisting pipe bending provided in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the assembly of the temperature sensor, electromagnetic heating device and pipe in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the assembly of a robot and a switchable flange in an embodiment of the present invention;

[0030] In the figure: 1-robot arm interface; 2-switch flange; 3-laser heating device; 4-upper slider; 5-upper block; 6-lower wheel mold; 7-temperature sensor; 8-electromagnetic heating device; 9-pipe; 10-bending mold; 11-robot. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Combine the following Figures 1 to 3 , describing an embodiment of the present invention.

[0034] The present invention provides a heating device for assisting tube bending, which is particularly suitable for heating a titanium alloy tube 9 , and comprises: a laser heating device 3 , an electromagnetic heating device 8 and a temperature sensor 7 .

[0035] The laser heating device 3 is arranged at the free end of the robot arm, and the laser heating device 3 is used to preheat the part of the pipe to be bent; the electromagnetic heating device 8 is arranged at the free end of the robot arm, and the electromagnetic heating device 8 is used to auxiliary heat the preheated part of the pipe to be bent; the temperature sensor 7 is arranged at the free end of the robot arm, and the temperature sensor 7 is used to detect the temperature of the part of the pipe to be bent and feed it back to the control system, and the control system controls the electromagnetic heating device 8 to work according to the temperature information of the part of the pipe to be bent.

[0036] The present invention achieves the purpose of rapid preheating and precise auxiliary heating by combining laser heating with electromagnetic assisted heating. Specifically, the laser provides a concentrated and controllable heat source to quickly preheat the tube 9, and electromagnetic heating makes up for the lack of dynamic adjustment ability of laser heating technology, thereby effectively avoiding local overheating or cooling problems caused by uneven heat distribution in traditional heating methods. In addition, the control system uses the temperature information fed back by the temperature sensor 7 to flexibly respond to temperature changes during the processing process, ensuring that the temperature of the bending area is always within the optimized range, significantly improving the processing quality.

[0037] In some embodiments, the embodiments of the present invention also include a switching flange 2, which is used to be installed on the free end of the robotic arm. The switching flange 2 has a first mounting portion and a second mounting portion, and the first mounting portion is used to install the bending mold 10; the laser heating device 3 is installed on the second mounting portion, and the electromagnetic heating device 8 and the temperature sensor 7 are installed on the first mounting portion.

[0038] The embodiment of the present invention adopts a switching flange 2, and the laser heating device 3 for preheating, the electromagnetic heating device 8 for auxiliary heating and processing, and the bending die 10 are integrated in the same switching flange 2. The switching flange 2 is used to switch the positions of the components used in the two processes, which reduces the connection time between the two, reduces heat loss, and improves thermal efficiency. Compared with traditional methods, this integrated design not only reduces energy consumption, but also adapts to the processing requirements of titanium alloy pipes 9 of different sizes and complex shapes.

[0039] In some embodiments, the heating end of the electromagnetic heating device 8 is an electromagnetic induction coil. In the heating state, the electromagnetic induction coil is sleeved on the portion of the pipe to be bent.

[0040] Since the present invention does not improve the electromagnetic heating device 8, and the electromagnetic heating device 8 is a mature prior art, the composition of the electromagnetic heating device 8 is not described in detail in this specification.

[0041] In some embodiments, the electromagnetic induction coil, the temperature sensor 7 and the bending die 10 are sequentially disposed on the first mounting portion.

[0042] This embodiment facilitates the sequential auxiliary heating, temperature detection and bending of the preheated pipe to be bent. After the temperature detection is completed, the control system determines whether the temperature has reached the designed threshold range. If not, the electromagnetic induction coil is controlled to move to the pipe to be bent to heat it, and the auxiliary heating and temperature detection steps are circulated until the temperature reaches the designed threshold range.

[0043] It can be understood that during use, since the electromagnetic induction coil is sleeved on the pipe 9, after heating is completed, the robot arm needs to control the switching flange 2 to drive the electromagnetic induction coil, the temperature sensor 7 and the bending die 10 to move a short distance along the axial direction of the pipe 9. This short distance just makes the temperature sensor 7 contact with the part of the pipe to be bent, thereby realizing temperature detection. When the detection meets the requirements, the switching flange 2 continues to be driven to move a short distance along the axial direction of the pipe 9, so that the bending die 10 is facing the part of the pipe to be bent, so that the bending die 10 can bend the part of the pipe to be bent.

[0044] Since the bending die 10 is also a structure in the mature prior art, the present invention does not make any improvements thereto, and therefore, in this specification, no further description is given of the composition of the bending die 10. The bending die 10 only needs to be able to bend the heated pipe 9.

[0045] In some embodiments, the temperature sensor 7 is a contact temperature sensor 7 .

[0046] The temperature detection accuracy in this embodiment is high.

[0047] The present invention also provides a pipe bending device, comprising: a robot 11, a clamping assembly, a bending die 10 and a heating device for assisting pipe bending as described above; the clamping assembly is used to clamp one end of a pipe 9, and the other end of the pipe 9 is suspended in the air, so that the electromagnetic induction coil can be nested in the pipe 9 from the suspended end of the pipe 9, and the laser heating device 3, the bending die 10, the electromagnetic heating device 8 and the temperature sensor 7 are all arranged on the mechanical arm of the robot 11.

[0048] The present invention achieves the purpose of rapid preheating and precise auxiliary heating by combining laser heating with electromagnetic assisted heating. Specifically, the laser provides a concentrated and controllable heat source to quickly preheat the tube 9, and electromagnetic heating makes up for the lack of dynamic adjustment ability of laser heating technology, thereby effectively avoiding local overheating or cooling problems caused by uneven heat distribution in traditional heating methods. In addition, the control system uses the temperature information fed back by the temperature sensor 7 to flexibly respond to temperature changes during the processing process, ensuring that the temperature of the bending area is always within the optimized range, significantly improving the processing quality.

[0049] In some embodiments, the embodiments of the present invention also include a switching flange 2, which is used to be installed on the free end of the robot arm. The switching flange 2 has a first mounting portion and a second mounting portion. The laser heating device 3 is installed on the second mounting portion, and the electromagnetic heating device 8, the bending mold 10 and the temperature sensor 7 are installed on the first mounting portion.

[0050] In some embodiments, the electromagnetic heating device 8, the temperature sensor 7 and the bending mold 10 are sequentially installed on the first installation portion.

[0051] In some embodiments, during the laser preheating stage, the clamping assembly can also drive the tube 9 to rotate.

[0052] During preheating, the laser only needs to be irradiated on a specific position of the tube 9, and then the clamping assembly drives the tube 9 to rotate to achieve the purpose of circumferential heating of the part of the tube to be bent.

[0053] The present invention also provides a pipe bending method, which is performed using the pipe bending device, and comprises:

[0054] Preparation step: Use the clamping assembly to accurately clamp the pipe 9;

[0055] Preheating step: the robot arm drives the laser heating device 3 to preheat all the parts to be bent on the tube 9 in sequence;

[0056] Auxiliary heating step: the robot arm drives the electromagnetic heating device 8 to perform auxiliary heating on the preheated pipe to be bent;

[0057] Bending step: the robot arm drives the bending die 10 to bend the part of the pipe to be bent after the auxiliary heating;

[0058] When there are multiple parts to be bent, the auxiliary heating step and the bending step are repeated until all the parts to be bent are processed.

[0059] In some examples, there is a temperature detection step between the auxiliary heating step and the bending step. The control system determines whether the auxiliary heating reaches the required temperature based on the temperature detection information. If the required temperature is not reached, the instrument wall drives the electromagnetic heating device 8 to move to the part of the pipe to be bent for reheating.

[0060] It can be understood that the auxiliary heating step, the temperature detection step and the bending step are not performed simultaneously, but are performed in sequence, and the processing targets of the three steps are all the part of the pipe to be bent. Therefore, after the auxiliary heating step is completed, the robot arm needs to drive the switching flange 2 to drive the temperature sensor 7 to advance a certain distance along the axial direction of the pipe 9 so that the temperature sensor 7 contacts the part of the pipe to be bent. After the temperature detection is completed, the control system determines whether the temperature reaches the required temperature. If the required temperature is not reached, the robot arm drives the switching flange 2 to drive the temperature sensor 7 and the electromagnetic heating device 8 to retreat a certain distance along the axial direction of the pipe 9 so that the electromagnetic heating device 8 returns to the part of the pipe to be bent, and then starts the electromagnetic heating device 8 to heat the part of the pipe to be bent again until the temperature meets the requirements, and then drives the switching flange 2 to drive the bending die 10 to advance a certain distance along the axial direction of the pipe 9 so that the bending die 10 is aligned with the part of the pipe to be bent, and then starts the bending die 10 to bend the part of the pipe to be bent.

[0061] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A heating device for assisting pipe bending, characterized in that: include: A laser heating device is arranged at the free end of the robot arm, and is used to preheat the portion of the pipe to be bent; An electromagnetic heating device is arranged at the free end of the robot arm, and is used to perform auxiliary heating on the preheated portion of the pipe to be bent; The temperature sensor is arranged at the free end of the robot arm, and is used to detect the temperature of the part of the pipe to be bent and feed it back to the control system. The control system controls the operation of the electromagnetic heating device according to the temperature information of the part of the pipe to be bent.

2. The heating device for assisting pipe bending according to claim 1, characterized in that: It also includes a switching flange, which is used to be installed on the free end of the robotic arm. The switching flange has a first mounting portion and a second mounting portion, and the first mounting portion is used to install the bending mold; the laser heating device is installed on the second mounting portion, and the electromagnetic heating device and the temperature sensor are installed on the first mounting portion.

3. The heating device for assisting pipe bending according to claim 2 is characterized in that: The heating end of the electromagnetic heating device is an electromagnetic induction coil. In the heating state, the electromagnetic induction coil is sleeved on the part of the pipe to be bent.

4. The heating device for assisting pipe bending according to claim 3 is characterized in that: The electromagnetic induction coil, the temperature sensor and the bending die are sequentially arranged on the first mounting portion.

5. The heating device for assisting pipe bending according to claim 1, characterized in that: The temperature sensor is a contact temperature sensor.

6. A pipe bending device, characterized in that: include: A robot, a clamping assembly, a bending die and a heating device for assisting pipe bending as described in any one of claims 1 to 4; the clamping assembly is used to clamp one end of the pipe, and the other end of the pipe is suspended in the air; the laser heating device, the bending die, the electromagnetic heating device and the temperature sensor are all arranged on the robot's mechanical arm.

7. The tube bending device according to claim 6, characterized in that: It also includes a switching flange, which is used to be installed on the free end of the robot arm. The switching flange has a first mounting portion and a second mounting portion. The laser heating device is installed on the second mounting portion, and the electromagnetic heating device, the bending mold and the temperature sensor are installed on the first mounting portion.

8. The tube bending device according to claim 7, characterized in that: The electromagnetic heating device, the temperature sensor and the bending die are sequentially mounted on the first mounting portion.

9. The tube bending device according to claim 7, characterized in that: During the laser preheating stage, the clamping assembly can also drive the tube to rotate.

10. A pipe bending method, characterized in that: include: Preparation steps: Use clamping components to precisely clamp the pipe; Preheating step: The robotic arm drives the laser heating device to preheat all the parts to be bent on the pipe in turn; Auxiliary heating step: the robot arm drives the electromagnetic heating device to perform auxiliary heating on the preheated pipe to be bent; Bending step: the robot arm drives the bending die to bend the part of the pipe to be bent after auxiliary heating; When there are multiple parts to be bent, the auxiliary heating step and the bending step are repeated until all the parts to be bent are processed.

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