An automatic CNC multi-stage bending device for pipes

Abstract

The present invention relates to the technical field of pipe processing, and discloses an automatic CNC multi-stage bending device for pipes, comprising a machine tool, a CNC machine box arranged on the machine tool, and a pipe bending transmission mechanism arranged on the machine tool, and also comprising a pipe bending adjustment mechanism arranged on the machine tool, and a pipe bending mechanism arranged on the pipe bending adjustment mechanism; the pipe bending mechanism comprises a pipe bending seat, a driving assembly is arranged inside the pipe bending seat, and a pipe bending assembly is rotatably mounted on the pipe bending seat. The automatic CNC multi-stage bending device for pipes can bend the pipe to a predetermined angle through the cooperation between the pipe bending transmission mechanism and the pipe bending mechanism, and at the same time, the angle of the pipe clamp and the pipe can be adjusted according to the processing needs through the setting of the angle adjuster. Through this setting, after a bending operation is completed, the direction of the pipe can be changed by adjusting the angle adjuster, thereby realizing multi-stage bending and diversified bending processing of the pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe processing, and in particular relates to an automatic numerically controlled multi-stage pipe bending device. Background Art

[0002] In the field of metal pipe processing, pipe bending is a crucial process. It is widely used in many industries such as construction, automobiles, aerospace, furniture manufacturing, etc. With the continuous development of modern industry, in order to improve production quality, it is particularly important to control the quality of metal pipe bending.

[0003] At present, when traditional bending equipment is bending metal pipes, most of them can only perform a single, continuous bending operation on the pipes, and cannot achieve the complex bending requirements of multiple sections and multiple angles of the pipes. This limitation greatly restricts the flexibility and diversity of pipe processing, and cannot meet the growing requirements for complex pipe structures in modern industry. In addition, during the bending process, the pipes are very prone to deformation and cracking due to the influence of their material properties, which leads to plastic deformation and even cracking of the pipes during the bending process. This deformation and cracking not only seriously affects the quality of the pipe bending, but may also cause damage to the overall structure of the pipe, reducing the service life and safety of the product; therefore, there are deficiencies and cannot meet the production and use needs of manufacturers. Therefore, it is necessary to further improve it.

[0004] Therefore, in view of this, the existing structure and deficiencies are studied and improved, and an automatic CNC multi-stage bending device for pipes is provided, in order to achieve a more practical purpose. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an automatic CNC multi-stage pipe bending device, which is achieved by the following specific technical means:

[0006] An automatic CNC multi-stage pipe bending device comprises a machine tool, a CNC machine box arranged on the machine tool, and a pipe bending transmission mechanism arranged on the machine tool, and also comprises a pipe bending adjustment mechanism arranged on the machine tool, and a pipe bending mechanism arranged on the pipe bending adjustment mechanism;

[0007] The pipe bending mechanism comprises a pipe bending seat, a driving assembly is arranged inside the pipe bending seat, a pipe bending assembly is rotatably mounted on the pipe bending seat, and a clamping assembly for fixing the metal pipe is also arranged on the upper side of the pipe bending seat, the clamping assembly cooperates with the pipe bending assembly to achieve the fixing and clamping of the metal pipe, and the driving assembly is used to drive the pipe bending assembly and the clamping assembly to rotate to perform the bending operation on the metal pipe;

[0008] A positioning component for positioning the metal pipe is arranged on the upper surface of the pipe bending seat, and a supporting component and a preheating component are arranged inside the positioning component. The pressure of the supporting component pushes the preheating component to always fit the outer periphery of the metal pipe, and the pipe is bent and preheated.

[0009] As a further description of the above technical solution: a bending torque is applied to the pipe through the pipe bending assembly, and the clamping assembly plays a role in fixing the pipe to prevent the pipe from slipping or deforming during the bending process. As the pipe bending assembly continues to rotate, the pipe will gradually be bent to a predetermined angle. In addition, the angle of the pipe clamp and the pipe can be adjusted according to processing needs through the setting of the angle adjuster. Through this setting, after a bending operation is completed, the direction of the pipe can be changed by adjusting the angle adjuster, thereby realizing multi-segment bending and diversified bending processing of the pipe. At the same time, the rotation angle and speed of the pipe bending assembly and the clamping assembly are accurately controlled by the CNC program to ensure the bending accuracy and consistency of the pipe.

[0010] Further, the bending pipe transmission mechanism includes a transmission slide rail fixedly mounted on the machine tool, a transmission seat is slidably mounted on the transmission slide rail, a transmission motor is also provided on the machine tool, and the transmission motor is located on the left side of the transmission slide rail, and a transmission screw is fixedly connected to the right side of the transmission motor using the output end, and the transmission screw is screwed and connected to the transmission seat through a thread;

[0011] The pipe bending transmission mechanism also includes an angle adjuster fixedly mounted on the transmission seat, and a pipe clamp for fixing and clamping the pipe is fixedly mounted on the right side of the angle adjuster.

[0012] As a further description of the above technical solution: the tube is automatically clamped and fixed by the tube clamp, and the direction of the tube can be changed by adjusting the angle adjuster, thereby realizing multi-stage bending and diversified bending processing of the tube.

[0013] Furthermore, the bending pipe adjustment mechanism includes a first adjustment component and a second adjustment component. The first adjustment component is fixedly assembled on the right side of the machine tool, and the second adjustment component is arranged on the first adjustment component. The first adjustment component drives the bending pipe mechanism to adjust its position in the vertical direction, and the second adjustment component drives the bending pipe mechanism to adjust its position in the horizontal direction.

[0014] As a further description of the above technical solution: through the mutual cooperation between the first adjustment component and the second adjustment component, the pipe can be accurately positioned between the pipe bending chuck and the clamping chuck to meet the bending requirements of different pipes.

[0015] Furthermore, the driving assembly includes a servo motor fixedly mounted on the bottom of the tube bending seat, a driving gear disc and a driven gear disc are arranged inside the tube bending seat, and a transmission belt is connected between the driving gear disc and the driven gear disc, and the top output end of the servo motor passes through the interior of the tube bending seat and is fixedly connected to the driving gear disc.

[0016] As a further description of the above technical solution: the servo motor is started by controlling the program, and the servo motor drives the active gear disc to rotate. The active gear disc then uses a transmission belt to drive the driven gear disc to rotate synchronously, thereby applying a bending moment to the pipe.

[0017] Furthermore, the pipe bending assembly includes a movable shaft movably mounted on the pipe bending seat, the movable shaft is equipped with a pipe bending chuck for bending the pipe, and a fixed bayonet is fixedly mounted on the top of the pipe bending chuck;

[0018] Wherein, the driven gear disc is fixedly assembled on the outer periphery of the movable shaft.

[0019] As a further description of the above technical solution: by providing a plurality of pipe bending chucks with different diameters, the pipe can be bent according to the pipe bending needs to meet the bending requirements of different pipes.

[0020] Furthermore, the clamping assembly includes a movable base fixedly mounted on a movable shaft, a clamping seat fixedly mounted on the movable base, a first electric telescope fixedly mounted on the clamping seat, and the first electric telescope fixedly connected to a clamping chuck for clamping and fixing the pipe by a telescopic rod.

[0021] As a further description of the above technical solution: the telescopic rod of the first electric telescopic device is controlled by a program to push the clamping chuck to move and tightly combine with the bending chuck to achieve a firm clamping of the pipe.

[0022] Furthermore, the positioning assembly includes a positioning base fixedly mounted on the upper surface of the bending pipe seat, a sliding rod is fixedly mounted on the positioning base, and a sliding seat is slidably mounted on the sliding rod;

[0023] The positioning base is provided with a symmetrically installed fixing seat, on which a second electric telescopic device is fixedly mounted, and the second electric telescopic device is fixedly connected with a positioning chuck for positioning the pipe by means of a telescopic rod.

[0024] As a further description of the above technical solution: the telescopic rod of the second electric telescopic device pushes the sliding seat and the positioning chuck to move relative to each other, so that the two positioning chucks are combined with each other to achieve the positioning of the pipe.

[0025] Furthermore, the support assembly includes a support base fixedly mounted inside the positioning chuck, a support frame fixedly mounted on the support base, a guide rod fixedly mounted on the support frame, a guide slider slidably mounted on the guide rod, a first support rod movably mounted on the support frame, a second support rod movably mounted between the first support rod and the guide slider, a support spring is provided on the outer periphery of the guide rod, and the support spring is located on one side of the guide slider.

[0026] As a further description of the above technical solution: through this arrangement, based on the elastic force of the supporting spring, the heating plate can always be in contact with the surface of the pipe, ensuring that the pipe is heated evenly and improving the bending quality.

[0027] Furthermore, the preheating assembly includes an electric heating part, one side of which is connected to the first support rod, and a plurality of heating plates for preheating the pipe are arranged on the side of the electric heating part away from the first support rod, and a rotating connecting piece is fixedly connected between the heating plate and the electric heating part.

[0028] As a further description of the above technical solution: the heating plate can be rotated to the point of maximum force on the outer wall of the pipe through the setting of the rotating connecting piece to ensure uniform heating, and the setting of multiple heating plates enables them to be evenly distributed on the outer periphery of the pipe, so that the heating plates generate heat and preheat the pipe. Through this setting, the pipe can be preheated before the bending operation.

[0029] Furthermore, an inner cavity is formed inside the guide rod, and a sensing component is arranged in the inner cavity, wherein the sensing component comprises a sliding rheostat fixedly mounted in the inner cavity of the guide rod, and a sensing paddle is slidably mounted on the sliding rheostat;

[0030] An active groove is provided on the inner cavity wall of the guide rod, a connecting rod is fixedly mounted on the sensing paddle, one end of the connecting rod away from the sensing paddle passes through the active groove and is fixedly connected to the guide slider, wherein the sliding rheostat is electrically connected to the electric heating part.

[0031] As a further description of the above technical solution: this setting can be used to adjust the current in the electric heating part, so that it can automatically adjust the current according to the diameter of the pipe, achieve effective control of energy, and avoid energy waste.

[0032] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0033] 1. This automatic CNC multi-stage bending device for pipes uses the cooperation between the pipe bending transmission mechanism and the pipe bending mechanism. The pipe bending assembly applies a bending torque to the pipe, while the clamping assembly fixes the pipe to prevent the pipe from slipping or deforming during the bending process. With the continuous rotation of the pipe bending assembly, the pipe will gradually be bent to a predetermined angle. In addition, the angle of the pipe clamp and the pipe can be adjusted according to processing needs through the setting of the angle adjuster. Through this setting, after a bending operation is completed, the direction of the pipe can be changed by adjusting the angle adjuster, thereby realizing multi-stage bending and diversified bending processing of the pipe. At the same time, the rotation angle and speed of the pipe bending assembly and the clamping assembly are accurately controlled by the CNC program to ensure the bending accuracy and consistency of the pipe.

[0034] 2. This automatic CNC multi-stage bending device for pipes converts electrical energy into thermal energy through the mutual cooperation between the positioning component, the supporting component and the preheating component through program control of the electric heating part, so that the heating plate generates heat and preheats the pipe. Through this setting, the pipe can be preheated before the bending operation. After the pipe absorbs heat, the vibration and movement speed of its internal atoms or molecules will increase, resulting in an increase in the overall temperature of the pipe. As the temperature rises, the plasticity of the pipe will increase and the deformation resistance will decrease, which makes the pipe easier to bend and less likely to break in the subsequent bending process, thereby improving the plasticity of the pipe, reducing its deformation resistance, and facilitating subsequent bending processing.

[0035] 3. This automatic CNC multi-stage pipe bending device drives the heating plate to rotate to the maximum force point on the outer wall of the pipe through the mutual cooperation between the positioning component, the support component and the preheating component to ensure uniform heating. Based on the elastic force applied by the support component, the heating plate is always in contact with the surface of the pipe. Through the design of the preheating component, the heating plate can be evenly distributed on the outer periphery of the pipe and always in close contact with the surface of the pipe, ensuring that the pipe is heated evenly and improving the bending quality. At the same time, the mutual cooperation between the support component, the preheating component and the induction component can be used to automatically adjust the current according to the diameter of the pipe, thereby realizing effective control of energy and avoiding energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0037] Figure 1 It shows a schematic diagram of an overall three-dimensional structure provided according to an embodiment of the present invention;

[0038] Figure 2 A schematic structural diagram of a pipe bending transmission mechanism according to an embodiment of the present invention is shown;

[0039] Figure 3 A schematic diagram of the installation structure of a pipe bending adjustment mechanism and a pipe bending mechanism provided in an embodiment of the present invention is shown;

[0040] Figure 4 A schematic diagram of the structure of a bend pipe adjustment mechanism provided according to an embodiment of the present invention is shown;

[0041] Figure 5 A schematic diagram of the installation structure of a pipe bending mechanism and a positioning assembly provided in an embodiment of the present invention is shown;

[0042] Figure 6 A schematic diagram of the structure of a pipe bending mechanism provided in an embodiment of the present invention is shown;

[0043] Figure 7 A schematic diagram of a local structure of a pipe bending mechanism provided according to an embodiment of the present invention is shown;

[0044] Figure 8 A schematic diagram of the structure of a positioning component provided in an embodiment of the present invention is shown;

[0045] Fig. 9 A schematic diagram of a local structure of a positioning component provided according to an embodiment of the present invention is shown;

[0046] Fig.10 A schematic diagram of the installation structure of the positioning chuck and the support assembly provided in an embodiment of the present invention is shown;

[0047] Fig.11 A schematic diagram of the installation structure of the support assembly and the preheating assembly provided in an embodiment of the present invention is shown;

[0048] Fig.12 A partial structural schematic diagram of a support assembly provided according to an embodiment of the present invention is shown.

[0049] Legend:

[0050] 10. Machine tools; 11. CNC machine box;

[0051] 20. Bending tube transmission mechanism; 21. Transmission slide rail; 22. Transmission seat; 23. Transmission motor; 24. Transmission screw; 25. Angle adjuster; 26. Tube clamp;

[0052] 30. elbow adjustment mechanism; 31. first adjustment assembly; 32. second adjustment assembly;

[0053] 40. pipe bending mechanism; 41. pipe bending seat; 42. driving assembly; 421. servo motor; 422. driving gear plate; 423. driven gear plate; 424. transmission belt; 43. pipe bending assembly; 431. movable shaft; 432. pipe bending chuck; 433. fixing bayonet; 44. clamping assembly; 441. movable base; 442. clamping seat; 443. first electric telescopic device; 444. clamping chuck;

[0054] 50. Positioning assembly; 51. Positioning base; 52. Sliding rod; 53. Sliding seat; 54. Fixed seat; 55. Second electric telescopic device; 56. Positioning chuck;

[0055] 60. Support assembly; 61. Support base; 62. Support frame; 63. Guide rod; 631. Movable slot; 64. Guide slider; 65. First support rod; 66. Second support rod; 67. Support spring;

[0056] 70. preheating assembly; 71. electric heating unit; 72. rotating connecting piece; 73. heating plate;

[0057] 80. Sensing assembly; 81. Sliding rheostat; 82. Sensing paddle; 83. Connecting rod. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0059] See also Figures 1 to 12A pipe automatic CNC multi-stage bending device includes a machine tool 10, a CNC machine box 11 arranged on the machine tool 10, and a pipe bending transmission mechanism 20 arranged on the machine tool 10, and also includes a pipe bending adjustment mechanism 30 arranged on the machine tool 10, and a pipe bending mechanism 40 arranged on the pipe bending adjustment mechanism 30; the pipe bending mechanism 40 includes a pipe bending seat 41, a driving component 42 is arranged inside the pipe bending seat 41, a pipe bending component 43 is rotatably installed on the pipe bending seat 41, and a clamping component 44 for fixing the metal pipe is also arranged on the upper side of the pipe bending seat 41, and the clamping component 44 cooperates with the pipe bending component 43 to achieve the fixing and clamping of the metal pipe, and the driving component 42 is used to drive the pipe bending component 43 and the clamping component 44 to rotate to perform the bending operation on the metal pipe; a positioning component 50 for positioning the metal pipe is arranged on the upper surface of the pipe bending seat 41, and a supporting component 6 is arranged inside the positioning component 50 0 and preheating assembly 70, the preheating assembly 70 is pushed to always fit the outer periphery of the metal pipe through the pressure of the support assembly 60, and the pipe is bent and preheated; a bending moment is applied to the pipe through the bending assembly 43, and the clamping assembly 44 plays a role in fixing the pipe to prevent the pipe from slipping or deforming during the bending process. With the continuous rotation of the bending assembly 43, the pipe will gradually be bent to a predetermined angle. In addition, the angle adjuster 25 can be set to adjust the angle of the pipe clamp 26 and the pipe according to processing needs. Through this setting, after a bending operation is completed, the direction of the pipe can be changed by adjusting the angle adjuster 25, thereby realizing multi-segment bending and diversified bending processing of the pipe. At the same time, the rotation angle and speed of the bending assembly 43 and the clamping assembly 44 are accurately controlled by the CNC program to ensure the bending accuracy and consistency of the pipe.

[0060] See also Figure 1 to Figure 2 The pipe bending transmission mechanism 20 includes a transmission slide rail 21 fixedly mounted on the machine tool 10, a transmission seat 22 is slidably mounted on the transmission slide rail 21, and a transmission motor 23 is also provided on the machine tool 10, and the transmission motor 23 is located on the left side of the transmission slide rail 21, and a transmission screw 24 is fixedly connected to the right side of the transmission motor 23 by using the output end, and the transmission screw 24 is screwed with the transmission seat 22 by threaded engagement; the pipe bending transmission mechanism 20 also includes an angle adjuster 25 fixedly mounted on the transmission seat 22, and a pipe clamp 26 for fixing and clamping the pipe is fixedly mounted on the right side of the angle adjuster 25; the pipe is automatically clamped and fixed by the pipe clamp 26, and the direction of the pipe can be changed by adjusting the angle adjuster 25, thereby realizing multi-stage bending and diversified bending processing of the pipe.

[0061] See also Figure 3 to Figure 4The pipe bending adjustment mechanism 30 includes a first adjustment component 31 and a second adjustment component 32. The first adjustment component 31 is fixedly assembled on the right side of the machine tool 10, and the second adjustment component 32 is arranged on the first adjustment component 31. The first adjustment component 31 drives the pipe bending mechanism 40 to adjust its position in the vertical direction, and the second adjustment component 32 drives the pipe bending mechanism 40 to adjust its position in the horizontal direction; through the mutual cooperation between the first adjustment component 31 and the second adjustment component 32, the pipe can be accurately positioned between the pipe bending chuck 432 and the clamping chuck 444 to meet the bending requirements of different pipes.

[0062] See also Figures 4 to 7 The driving assembly 42 includes a servo motor 421 fixedly assembled at the bottom of the tube bending seat 41, a driving gear disc 422 and a driven gear disc 423 are arranged inside the tube bending seat 41, and a transmission belt 424 is connected between the driving gear disc 422 and the driven gear disc 423, and the top output end of the servo motor 421 passes through the inside of the tube bending seat 41 and is fixedly connected to the driving gear disc 422; the servo motor 421 is controlled to start through the program, and the servo motor 421 drives the driving gear disc 422 to rotate, and the driving gear disc 422 then drives the driven gear disc 423 to rotate synchronously by using the transmission belt 424, so that a bending moment can be applied to the pipe.

[0063] See also Figures 4 to 7 The pipe bending assembly 43 includes a movable shaft 431 movably assembled on the pipe bending seat 41, and a pipe bending chuck 432 for bending the pipe is assembled on the movable shaft 431, and a fixed pin 433 is fixedly assembled on the top of the pipe bending chuck 432; wherein, the driven gear plate 423 is fixedly assembled on the outer periphery of the movable shaft 431; by providing a plurality of pipe bending chucks 432 with different diameters, the pipe can be bent according to the needs of the pipe bending to meet the bending requirements of different pipes.

[0064] See also Figures 4 to 7 The clamping assembly 44 includes a movable base 441 fixedly assembled on the movable shaft 431, a clamping seat 442 is fixedly installed on the movable base 441, and a first electric telescopic device 443 is fixedly assembled on the clamping seat 442. The first electric telescopic device 443 is fixedly connected to a clamping chuck 444 for clamping and fixing the pipe by a telescopic rod; the telescopic rod of the first electric telescopic device 443 is controlled by a program to push the clamping chuck 444 to move and tightly combine with the bending pipe chuck 432 to achieve a firm clamping of the pipe.

[0065] See also Figures 3 to 5 , Figures 8 to 9The positioning assembly 50 includes a positioning base 51 fixedly assembled on the upper surface of the bending pipe seat 41, a sliding rod 52 is fixedly mounted on the positioning base 51, and a sliding seat 53 is slidably mounted on the sliding rod 52; a symmetrically mounted fixed seat 54 is provided on the positioning base 51, and a second electric telescopic device 55 is fixedly assembled on the fixed seat 54, and the second electric telescopic device 55 is fixedly connected to a positioning chuck 56 for positioning the pipe by a telescopic rod; the telescopic rod of the second electric telescopic device 55 pushes the sliding seat 53 and the positioning chuck 56 to move relative to each other, so that the two positioning chucks 56 are combined with each other to realize the positioning of the pipe.

[0066] See also Figures 10 to 12 The support assembly 60 includes a support base 61 fixedly assembled inside the positioning chuck 56, a support frame 62 is fixedly assembled on the support base 61, a guide rod 63 is fixedly mounted on the support frame 62, a guide slider 64 is slidably mounted on the guide rod 63, a first support rod 65 is movably mounted on the support frame 62, a second support rod 66 is movably mounted between the first support rod 65 and the guide slider 64, a support spring 67 is sleeved on the outer periphery of the guide rod 63, and the support spring 67 is located on one side of the guide slider 64; the second support rod 66 is pushed by the first support rod 65, so that one end of the second support rod 66 drives the guide slider 64 to slide on the guide rod 63, and during the sliding process of the guide block, the support spring 67 is squeezed at the same time, and based on the elastic force of the support spring 67, the heating plate 73 can always be in contact with the surface of the pipe, ensuring that the pipe is heated evenly and improving the bending quality.

[0067] See also Figure 10 to Figure 11 The preheating assembly 70 includes an electric heating part 71, one side of the electric heating part 71 is connected to the first support rod 65, and a plurality of heating plates 73 for preheating the pipe are arranged on the side of the electric heating part 71 away from the first support rod 65, and a rotating connecting piece 72 is fixedly connected between the heating plate 73 and the electric heating part 71; when the two positioning chucks 56 are in contact, the heating plate 73 on the preheating assembly 70 will first contact the outer wall of the pipe, and the heating plate 73 can be rotated to the maximum force point on the outer wall of the pipe through the setting of the rotating connecting piece 72 to ensure uniform heating, and the setting of multiple heating plates 73 enables them to be evenly distributed on the periphery of the pipe, and at the same time, the electric heating part 71 is controlled by a program to convert electrical energy into thermal energy, so that the heating plate 73 generates heat and preheats the pipe, and this setting enables the pipe to be preheated before the bending operation.

[0068] See also Figures 10 to 12An inner cavity is provided inside the guide rod 63, and a sensing component 80 is arranged in the inner cavity. The sensing component 80 includes a sliding rheostat 81 fixedly assembled in the inner cavity of the guide rod 63, and a sensing paddle 82 is slidably mounted on the sliding rheostat 81; a movable groove 631 is provided on the inner cavity wall of the guide rod 63, and a connecting rod 83 is fixedly mounted on the sensing paddle 82. The end of the connecting rod 83 away from the sensing paddle 82 passes through the movable groove 631 and is fixedly connected to the guide slider 64, wherein the sliding rheostat 81 is electrically connected to the electric heating part 71; the sliding rheostat 81 is electrically connected to the electric heating part 71 through the sliding rheostat 81, and the sliding distance of the sensing paddle 82 is inversely related to the change of the resistance value. Therefore, by adjusting the sliding distance of the sensing paddle 82, the resistance value of the sliding rheostat 81 can be accurately controlled, thereby realizing the adjustment of the current in the electric heating part 71, so that it can automatically adjust the current according to the diameter of the pipe, realize effective control of energy, and avoid energy waste.

[0069] The specific usage and function of this embodiment are as follows:

[0070] Working principle: When in use, the tube clamp 26 is used to automatically clamp the tube and fix it. After the clamping is completed, the CNC box 11 serves as the control center of the equipment to accurately control the entire equipment. Since the positioning component 50 is assembled on the upper surface of the tube bending seat 41, the driving component 42, the tube bending component 43 and the clamping component 44 are all assembled on the tube bending seat 41, the first adjustment component 31 is driven by the program control, and the first adjustment component 31 can drive the second adjustment component 32 and the entire tube bending seat 41 to move in the vertical direction, so that it moves up and down, and then the second adjustment component 32 is driven by the program control, and the second adjustment component 32 can drive the entire tube bending seat 41 to move in the horizontal direction, so that it moves forward and backward, thereby using the first adjustment component 3 The mutual cooperation between the first adjusting component 31 and the second adjusting component 32 can make the pipe be in a suitable position of the pipe bending chuck 432, and accurately position the pipe between the pipe bending chuck 432 and the pressing chuck 444. Since a plurality of pipe bending chucks 432 with different diameters are provided, when the bending radius of the pipe is small, the cooperation between the first adjusting component 31 and the second adjusting component 32 can be used to move the pipe to between the pipe bending chuck 432 with a smaller radius at the upper part and the pressing chuck 444. When the bending radius of the pipe is large, the cooperation between the first adjusting component 31 and the second adjusting component 32 can be used to move the pipe to between the pipe bending chuck 432 with a larger radius at the lower part and the pressing chuck 444, so that the pipe can be bent according to the bending needs to meet the bending requirements of different pipes;

[0071] At the same time, the telescopic rod of the first electric telescopic device 443 is controlled by the program to push the clamping chuck 444 to move and tightly combine with the pipe bending chuck 432 to achieve a firm clamping of the pipe; since the positioning component 50 is assembled on the upper surface of the pipe bending seat 41 and is located on the left side of the pipe bending component 43 and the clamping component 44, the pipe is first passed through the positioning component 50 when bending, and then bent by the pipe bending component 43 and the clamping component 44, and at the same time, the telescopic rod of the second electric telescopic device 55 is used to push the sliding seat 53 and the positioning chuck 56 to move relative to each other, so that the two positioning chucks 56 are combined with each other to achieve the positioning of the pipe;

[0072] When the two positioning chucks 56 are in contact, the heating plate 73 on the preheating assembly 70 will first contact the outer wall of the pipe. The heating plate 73 can be rotated to the maximum force position on the outer wall of the pipe by the setting of the rotating connecting piece 72 to ensure uniform heating. The setting of multiple heating plates 73 allows them to be evenly distributed on the outer periphery of the pipe, and based on the elastic force applied by the supporting assembly 60, the heating plate 73 always abuts against the surface of the pipe.

[0073] At this time, the program controls the electric heating part 71 to convert electrical energy into thermal energy, so that the heating plate 73 generates heat and preheats the pipe. Through this setting, the pipe is preheated before the bending operation. After the pipe absorbs heat, the vibration and movement speed of its internal atoms or molecules will increase, resulting in an increase in the overall temperature of the pipe. As the temperature rises, the plasticity of the pipe will increase and the deformation resistance will decrease, which makes the pipe easier to bend and less likely to break in the subsequent bending process, thereby improving the plasticity of the pipe and reducing its deformation resistance, which is convenient for subsequent bending processing;

[0074] In addition, while applying elastic force, the support assembly 60 pushes the first support rod 65 to push the second support rod 66, driving one end of the second support rod 66 to drive the guide slider 64 to slide on the guide rod 63. During the sliding process of the guide block, the connecting rod 83 is used to drive the sensing paddle 82 to slide on the sliding rheostat 81. The sliding rheostat 81 is electrically connected to the electric heating part 71. The sliding distance of the sensing paddle 82 is inversely proportional to the change in resistance value. When the sensing paddle 82 slides on the sliding rheostat 81, as the sliding distance increases, the resistance value of the entire sliding rheostat 81 also decreases. When the voltage remains constant, according to Ohm's law, the current in the circuit is inversely proportional to the resistance, so a decrease in resistance will lead to an increase in current. Therefore, by adjusting the sliding distance of the induction paddle 82, the resistance value of the sliding rheostat 81 can be accurately controlled, thereby achieving the adjustment of the current in the electric heating part 71; when the diameter of the pipe is large, the distance that the preheating component 70 moves toward the inside of the positioning chuck 56 is farther. At this time, the second support rod 66 pushes the guide slider 64 to slide farther on the guide rod 63, and the sliding distance of the induction paddle 82 on the sliding rheostat 81 increases, and the resistance decreases, resulting in an increase in the electric current. The flow increases, and the heating effect of the heating plate 73 on the pipe is improved. Through this setting, the electric energy and heat can be reasonably output, ensuring that the heat can be evenly and quickly transferred to the pipe, thereby improving the heating efficiency; on the contrary, when the diameter of the pipe is small, the required heat is relatively small, and the distance that the preheating component 70 moves toward the inside of the positioning chuck 56 is shorter. At this time, the second support rod 66 pushes the guide slider 64 on the guide rod 63 to slide a shorter distance, and the sliding distance of the induction paddle 82 on the sliding rheostat 81 is reduced, the resistance is increased, and the current is reduced, thereby achieving effective control of energy and avoiding energy waste. Since the pipe has a small diameter, if it continues to be heated with a large current output, it will not only cause energy waste, but also may cause unnecessary damage to the pipe. Therefore, this setting can reduce the current output, so that it can achieve effective control of electric energy while ensuring the heating effect of the pipe; and through the design of the preheating component 70, the heating plates 73 can be evenly distributed on the outer periphery of the pipe and always closely abut against the surface of the pipe, ensuring that the pipe is heated evenly, improving the bending quality, and enabling it to automatically adjust the current size according to the diameter of the pipe, achieving effective control of energy and avoiding energy waste;

[0075] Finally, when the pipe is preheated and fixed, the program will control the servo motor 421 to start, the servo motor 421 drives the active gear plate 422 to rotate, and the active gear plate 422 uses the transmission belt 424 to drive the driven gear plate 423 to rotate synchronously. Since the pipe bending assembly 43 and the clamping assembly 44 are both assembled on the movable shaft 431, the pipe bending assembly 43 and the clamping assembly 44 will rotate along the center line of the movable shaft 431 with the rotation of the driven gear plate 423, and during the rotation process, the pipe bending assembly 43 uses the pipe bending chuck 432 to apply a bending moment to the pipe, and the clamping assembly 44 uses the clamping chuck 444 to fix the pipe to prevent the pipe from slipping or deforming during the bending process. With the continuous rotation of the clamping assembly 44, the pipe will gradually be bent to a predetermined angle, thereby realizing the bending operation of the pipe; in addition, the angle adjuster 25 can be set to adjust the angle of the pipe clamp 26 and the pipe according to the processing needs. Through this setting, after a bending operation is completed, the direction of the pipe can be changed by adjusting the angle adjuster 25, thereby realizing multi-stage bending and diversified bending processing of the pipe; and the device adopts CNC technology, which can accurately control the rotation angle and speed of the bending assembly 43 and the clamping assembly 44 through the CNC program, thereby ensuring the bending accuracy and consistency of the pipe. This precise bending control not only improves the processing quality of the product, but also greatly reduces the scrap rate.

[0076] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic CNC multi-stage bending device for pipes, comprising a machine tool (10), a CNC machine box (11) arranged on the machine tool (10), and a pipe bending transmission mechanism (20) arranged on the machine tool (10), characterized in that: It also includes a pipe bending adjustment mechanism (30) arranged on the machine tool (10), and a pipe bending mechanism (40) arranged on the pipe bending adjustment mechanism (30); The pipe bending mechanism (40) comprises a pipe bending seat (41), a driving assembly (42) is arranged inside the pipe bending seat (41), a pipe bending assembly (43) is rotatably mounted on the pipe bending seat (41), and a clamping assembly (44) for fixing the metal pipe is also arranged on the upper side of the pipe bending seat (41), the clamping assembly (44) cooperates with the pipe bending assembly (43) to fix and clamp the metal pipe, and the driving assembly (42) drives the pipe bending assembly (43) and the clamping assembly (44) to rotate to perform a bending operation on the metal pipe; The upper surface of the pipe bending seat (41) is provided with a positioning assembly (50) for positioning the metal pipe, and the interior of the positioning assembly (50) is provided with a supporting assembly (60) and a preheating assembly (70), and the preheating assembly (70) is pushed by the pressure of the supporting assembly (60) to always fit the outer periphery of the metal pipe, and the pipe is bent and preheated; The positioning assembly (50) comprises a positioning base (51) fixedly mounted on the upper surface of the bending pipe seat (41), a sliding rod (52) fixedly mounted on the positioning base (51), and a sliding seat (53) slidably mounted on the sliding rod (52); A symmetrically mounted fixing seat (54) is provided on the positioning base (51); a second electric telescopic device (55) is fixedly mounted on the fixing seat (54); the second electric telescopic device (55) is fixedly connected to a positioning chuck (56) for positioning the pipe by means of a telescopic rod; The support assembly (60) comprises a support base (61) fixedly mounted inside the positioning chuck (56), a support frame (62) fixedly mounted on the support base (61), a guide rod (63) fixedly mounted on the support frame (62), a guide slider (64) slidably mounted on the guide rod (63), a first support rod (65) movably mounted on the support frame (62), a second support rod (66) movably mounted between the first support rod (65) and the guide slider (64), a support spring (67) being sleeved on the outer periphery of the guide rod (63), and the support spring (67) being located on one side of the guide slider (64); The preheating assembly (70) comprises an electric heating part (71), one side of the electric heating part (71) is connected to the first support rod (65), a side of the electric heating part (71) away from the first support rod (65) is provided with a plurality of heating plates (73) for preheating the pipe, and a rotating connection piece (72) is fixedly connected between the heating plate (73) and the electric heating part (71); An inner cavity is formed inside the guide rod (63), and a sensing component (80) is arranged in the inner cavity. The sensing component (80) comprises a sliding rheostat (81) fixedly mounted in the inner cavity of the guide rod (63), and a sensing paddle (82) is slidably mounted on the sliding rheostat (81); A movable groove (631) is provided on the inner cavity wall of the guide rod (63), a connecting rod (83) is fixedly mounted on the sensing paddle (82), an end of the connecting rod (83) away from the sensing paddle (82) passes through the movable groove (631) and is fixedly connected to the guide slider (64), wherein the sliding rheostat (81) is electrically connected to the electric heating part (71).

2. The automatic CNC multi-stage pipe bending device according to claim 1 is characterized in that: The bending pipe transmission mechanism (20) comprises a transmission slide rail (21) fixedly mounted on the machine tool (10), a transmission seat (22) being slidably mounted on the transmission slide rail (21), a transmission motor (23) being further arranged on the machine tool (10), and the transmission motor (23) being located on the left side of the transmission slide rail (21), a transmission screw rod (24) being fixedly connected to the right side of the transmission motor (23) via an output end, and the transmission screw rod (24) being screwed to the transmission seat (22) via a threaded connection; The pipe bending transmission mechanism (20) further comprises an angle adjuster (25) fixedly mounted on the transmission seat (22), and a pipe clamp (26) for clamping the pipe is fixedly mounted on the right side of the angle adjuster (25).

3. The automatic CNC multi-stage pipe bending device according to claim 1 is characterized in that: The pipe bending adjustment mechanism (30) comprises a first adjustment component (31) and a second adjustment component (32); the first adjustment component (31) is fixedly mounted on the right side of the machine tool (10); the second adjustment component (32) is arranged on the first adjustment component (31); the first adjustment component (31) drives the pipe bending mechanism (40) to adjust its position in a vertical direction; and the second adjustment component (32) drives the pipe bending mechanism (40) to adjust its position in a horizontal direction.

4. The automatic CNC multi-stage pipe bending device according to claim 1 is characterized in that: The driving assembly (42) comprises a servo motor (421) fixedly mounted on the bottom of the tube bending seat (41); a driving toothed disc (422) and a driven toothed disc (423) are arranged inside the tube bending seat (41); a driving belt (424) is connected between the driving toothed disc (422) and the driven toothed disc (423); and a top output end of the servo motor (421) passes through the inside of the tube bending seat (41) and is fixedly connected to the driving toothed disc (422).

5. The automatic CNC multi-stage pipe bending device according to claim 4 is characterized in that: The pipe bending assembly (43) comprises a movable shaft (431) movably mounted on the pipe bending seat (41); a pipe bending chuck (432) for bending the pipe is mounted on the movable shaft (431); and a fixing pin (433) is fixedly mounted on the top of the pipe bending chuck (432); The driven gear disc (423) is fixedly mounted on the outer periphery of the movable shaft (431).

6. The automatic CNC multi-stage pipe bending device according to claim 5 is characterized in that: The clamping assembly (44) comprises a movable base (441) fixedly mounted on a movable shaft (431); a clamping seat (442) is fixedly mounted on the movable base (441); a first electric telescopic device (443) is fixedly mounted on the clamping seat (442); the first electric telescopic device (443) is fixedly connected to a clamping chuck (444) for clamping and fixing the pipe by means of a telescopic rod.

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