CN111570634A

CN111570634A - Metal profile twisting, straightening and stretching system and method

Info

Publication number: CN111570634A
Application number: CN202010273711.1A
Authority: CN
Inventors: 朱大胜; 杜嘉豪; 张彬玢; 王云龙; 马永明
Original assignee: Suzhou Houfa Fine Line Co ltd; Nanjing Institute of Technology
Current assignee: Suzhou Houfa Fine Line Co ltd; Nanjing Institute of Technology
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-08-25
Anticipated expiration: 2040-04-09
Also published as: CN111570634B

Abstract

The invention provides a system and a method for twisting, straightening and stretching a metal profile, wherein the left end and the right end of the metal profile to be processed are respectively fixed by a clamping jaw, so that the metal profile to be processed is fixed in an electric heating device, the metal profile can be driven to rotate by proper degrees by the rotation of the clamping jaw on a twisting head device, the metal profile can be driven to horizontally move outwards by the translation of the clamping jaw on a traction and stretching device, an angle detection module, a temperature detection module, a displacement detection module and a control module are connected, and the system and the method also comprise an upper computer and a control module which are connected. The invention can realize the processes of twisting, straightening, stretch forming and tension straightening on the metal profile under the conditions of normal temperature and high temperature; the danger is reduced, and the accurate monitoring of key parameters is realized; the twisting, straightening, stretching and forming and the tension straightening are integrated, and the twisting, straightening or stretching can be independently performed, so that the working efficiency is improved, the automation degree is improved, and the investment cost of enterprises is reduced.

Description

Metal profile twisting, straightening and stretching system and method

Technical Field

The invention belongs to the technical field of metal profile processing, and particularly relates to a metal profile twisting, straightening and stretching system and method.

Background

The metal profile is widely applied to the field of national defense industry and equipment manufacturing, mainly produced by extrusion, and can cause different degrees of bending deformation of the profile due to the deviation of the extrusion temperature of an extruder, so a straightening machine is needed for straightening and eliminating the bending deformation. At present, because of the self lag of the existing metal profile straightening machine, especially for the straightening of tension, the requirements are difficult to meet, meanwhile, because of the process requirements, only independent twisting straightening or stretching forming is needed sometimes, so that an enterprise needs to prepare a plurality of devices, the working efficiency is low, the investment intensity of the enterprise on the devices is increased, and in the process of simultaneously carrying out straightening or stretching processes of different types, the metal profile needs to be transferred on devices, and because of direct contact with workpieces, the potential safety hazard is very serious.

Disclosure of Invention

In order to solve the problems, the invention provides a metal profile twisting, straightening and stretching system, which comprises a twisting head device, an electric heating device and a traction stretching device, wherein the twisting head device and the electric heating device are positioned at two ends of the electric heating device, clamping jaws are respectively arranged at one ends of the twisting head device and the electric heating device, which are close to the electric heating device, the left end and the right end of a metal profile to be processed are respectively fixed by one clamping jaw, so that the metal profile to be processed is fixed in the electric heating device, the metal profile can be driven to rotate by proper degrees by the rotation of the clamping jaws on the twisting head device, the metal profile can be driven to horizontally move outwards by the translation of the clamping jaws on the traction stretching device, an angle detection module is arranged on the twisting head device, a temperature detection module is arranged on the electric heating device, and a displacement detection module is arranged on the traction stretching device, the angle detection module, the temperature detection module, the displacement detection module and the control module are connected, and the angle detection module, the temperature detection module, the displacement detection module and the control module are connected.

The electric heating device is internally provided with an electric heating cabinet and a heating coil, and the temperature detection module is arranged on the inner wall of the electric heating device.

The traction and stretching device comprises a base, a plurality of supports are arranged on the base, a vertical fixed rod is arranged between the two supports and fixedly connected with the supports, a fixed shaft guide rail is arranged at the center of the fixed rod, the left end and the right end of the upper fixed shaft guide rail are matched and fixedly connected with the two upper fixed shafts, the rightmost end of the lower fixed shaft guide rail is fixed by a support shaft, the two fixed shaft guide rails are parallel to the plane of the base, the fixed shaft is arranged between the two fixed shaft guide rails and slides by adopting a roller, a traction motor is fixed on a base platform, the output shaft of the traction motor is vertical to the traction motor, a lead screw is arranged on the output shaft, the left end of the lead screw is fixedly connected with a hinge, the hinge is sleeved into the fixed shaft in a ring sleeve manner, the fixed shaft and the lead screw are in vertical relation and synchronous, the clamping jaw is fixedly connected with the fixed shaft, and the displacement detection module is fixed at the upper end of the starting end of the screw rod.

The twisting head device comprises a servo motor, a clamping jaw and a twisting oil cylinder, the servo motor is connected with the end of the metal profile, the clamping jaw is sleeved on the end of the metal profile, and the twisting oil cylinder is connected with the servo motor and the clamping jaw.

The bottom of the twisting head device and the bottom of the electric heating device are provided with rollers, the centers of the rollers are provided with through holes, the base is provided with a base guide rail, the inner ends of the base guide rail are provided with through holes with the same size as the centers of the rollers, and when the device reaches a proper position, the two devices are connected and fixed by using bolts.

The electric heating device further comprises a base of the heating coil, and a base groove of the heating coil is matched with the base guide rail.

The clamping jaw head adopts a U-shaped groove structure, a backing plate is arranged on the inner side of the U-shaped groove, two intermediate rods are fixed on the backing plate through rotating bolts, air cylinders are arranged at the upper ends of the two intermediate rods, springs are also arranged between the intermediate rods and the wall of the U-shaped groove, the working rods and the intermediate rods are connected through clamping groove buckles, the clamping jaws are connected with a rotating shaft through supporting rods, and an angle detection module is arranged above the supporting rods.

The supporting rod at the twisting device end can be bent at a certain angle, and the supporting rod at the traction and stretching device end is horizontal.

The contact part of the clamping jaw and the metal profile workpiece to be straightened is in a sawtooth structure, and the clamping jaw is made of heat-resistant high-strength steel.

The invention also discloses a system and a method for straightening and pulling the metal profile, which comprise the following steps: the first step is as follows: putting the metal profile to be processed into an electric heating device; the second step is that: fixing the left end and the right end of the metal profile by clamping jaws respectively; the third step: heating the metal profile by setting a proper temperature through an upper computer; the fourth step: if the single twisting and straightening is to be carried out, the step enters a fifth step, if the single pulling and shaping is to be carried out, the step enters a sixth step, and if the tension straightening is to be carried out, the step enters a seventh step; the fifth step: the clamping jaw of the traction and stretching device fixes the metal profiled bar to be immobile, and the clamping jaw of the twisting head device drives the metal profiled bar to rotate for a proper degree to finish twisting and straightening; and a sixth step: fixing the metal profile by using a clamping jaw of the twisting head device, and driving a screw rod to pull a fixed shaft to move rightwards to a required position by a traction motor; the seventh step: after the left end and the right end are fixed by the clamping jaws, the left end is twisted, the right end is stretched by the traction motor and pulled to a specified position, and the movement displacement of the traction motor is in direct proportion to the required applied tension.

The invention can realize the processes of twisting, straightening, stretch forming and tension straightening on the metal profile under the conditions of normal temperature and high temperature; the working process of the straightening machine is controlled through the upper computer, the working state is monitored, the frequency of direct contact of workers with equipment is reduced, the danger is reduced, and the key parameters of the straightening and stretching process are accurately monitored; the system device avoids the single twisting straightening and stretching straightening method of the conventional straightening machine, realizes the integration of twisting, straightening, stretching and forming and tension straightening, can twist, straighten or stretch independently, improves the working efficiency, improves the automation degree and lightens the investment cost of enterprises.

Drawings

Figure 1 is a functional block diagram of the multi-function straightening system of the present invention.

FIG. 2 is a view showing the construction of the multifunctional straightening system apparatus of the present invention.

FIG. 3 is a block diagram of the traction and stretching device of the multifunctional straightening system of the present invention.

FIG. 4 is a view showing the internal arrangement of the electric heating apparatus of the multifunctional straightening system of the present invention.

Figure 5 is a schematic view of the guide rail base of the multifunctional straightening system of the invention.

Figure 6 is a view of the structure of the jaw of the multifunctional straightening system according to the invention.

FIG. 7 is a schematic view of the U-shaped cover of the electric heating device of the multifunctional straightening system.

Description of reference numerals: the device comprises a servo device 1, an electric heating device 2, a heating wire 21, a heating coil 22, a heating coil supporting seat 23, an electric heating cabinet 24, a metal profiled bar 3, a traction stretching device 4, a support 5, a roller 6, a fixed bolt through hole 61, a displacement detection module 7, a twisting head device 8, a temperature detection module 25, a traction motor 41, a traction motor output shaft 42, a screw rod 43, a hinge 44, a fixed shaft guide rail 45, a supporting shaft 46, a fixed shaft 47, a twisting oil cylinder 81, a clamping jaw 82, an angle detection module 83, a sawtooth 831, a clamping groove buckle 832, a rotating shaft 833, a spring 834, a U-shaped groove 835, a backing plate 836, an angle detection module 837, a working rod 838, an intermediate rod 839, a supporting rod 840, an air cylinder 841 and a base.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "left end, right end, upper end, lower end" and the like are generally based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of the present invention.

The twisting straightening of the invention is to carry out pure straightening process on the bent metal profile.

The stretching forming means that the metal profile is longitudinally stretched to a specified length and needs to be within the yield limit tension of the material.

The tension straightening means that the metal profile is longitudinally stretched beyond the yield limit of the material.

As shown in fig. 1 and fig. 2, the present invention provides a metal profile twisting, straightening and stretching system, which includes a twisting head device 8, an electric heating device 2 and a stretching device 4, wherein the twisting head device 8 and the electric heating device 2 are located at two ends of the electric heating device 2, one end of each of the twisting head device 8 and the electric heating device 2, which is close to the electric heating device 2, is provided with a clamping jaw 82, the left and right ends of a metal profile 3 to be processed are respectively fixed by one clamping jaw 82, so that the metal profile 3 to be processed is fixed in the electric heating device 2, the rotation of the clamping jaw 82 on the twisting head device 8 can drive the metal profile to rotate by a suitable degree, the translation of the clamping jaw 82 on the stretching device 4 can drive the metal profile to horizontally move outward, the twisting head device 8 is provided with an angle detection module, the electric heating device is provided with a temperature detection module 25, be equipped with displacement detection module 7 on the traction stretching device, angle detection module 837, temperature detection module 25, displacement detection module 7 and control module link to each other, still include host computer and control module and connect.

The control system is used for controlling the operation of the twisting head device 8, the electric heating device 2 and the traction and stretching device 4 and monitoring the working state of the whole system. And information interaction between each device and the upper computer adopts a CAN bus communication mode. The CAN bus adopts a TJA1043 HS-CAN bus transceiver, the control system adopts an STM32 processor as a core industrial control board, and the straightening device CAN be controlled to work through a driving circuit.

As shown in fig. 4, the heating coil 22 is disposed on the heating coil support 23, two ends of the heating coil 22 are connected to the electric heating cabinet 24 through the heating wires 21, the electric heating device 2 further includes a base of the heating coil 22, a groove of the base of the heating coil 22 is adapted to the base guide rail 9, the electric heating cabinet adopts an IGBT intermediate frequency power supply, and an IGBT inverter module is adopted. The heating power supply cabinet 2 can finish heating the metal profile 3 to a specified temperature from a normal temperature within 3min, and has the advantages of high heating speed, energy conservation and environmental protection.

In order to ensure the accuracy of the temperature and the safety of an operator, the temperature detection module 25 is adopted in the process for determining the temperature of the metal profile to be heated in real time, as shown in fig. 7, the temperature detection module 25 is attached to the inner wall of the U-shaped heat-insulating cover of the electric heating device, the temperature detection module 25 adopts an optical fiber infrared thermometer, and the measured temperature is transmitted back to an upper computer in real time.

As shown in fig. 2, the twisting head device 8 includes a servo motor 1, a clamping jaw 82 and a twisting cylinder 81, the servo motor 1 is connected with the end of the metal profile 3, the clamping jaw 82 is sleeved on the end of the metal profile 3, and the twisting cylinder 81 is connected with the servo motor 1 and the clamping jaw 82.

Before the straightening process is started, the traction and stretching device 4 is reset. Fixing the position of a heating power supply cabinet 24, fixing the heating power supply cabinet on a base by using a bolt, placing the metal profile 3 to be processed into the heating power supply cabinet 2, enabling a clamping jaw 82 of a traction stretching device 4 to fix the right end of the metal profile 3, using an upper computer to control a servo device and a twisting head device 8 to move to a proper position, enabling the clamping jaw 82 of the twisting head device 8 to fix the left end of the metal profile 3, inserting the bolt into a fixing bolt through hole 61 and a base through hole at the moment, fixing the position of the twisting head device, and enabling the fixing bolt through hole 61 to be as shown in figures 2 and 5. Then, an instruction is sent to a servo system through an upper computer, the servo system is converted into a pulse signal and sent to a servo motor 1, the servo motor 1 drives a piston of the twisting oil cylinder 81 to perform stretching movement leftwards or rightwards, when the piston moves rightwards, the connecting rod drives the clamping jaw 82 to perform clockwise movement, otherwise, the twisting and straightening process is completed in the same way.

As shown in fig. 3, the traction and stretching device 4 has the following structure: the base is provided with a plurality of supports 5, the supports 5 are vertical to the base, 1/4 ends of the plurality of supports 5 from top to bottom and from bottom to top are provided with three fixing rods vertical to the supports 5, the fixing rods are connected with the supports 5 through fixing bolts, a fixing shaft guide rail 45 is arranged in the middle of the three fixing rods, the left end and the right end of the upper fixing shaft guide rail 45 are matched with two fixing shafts 47 arranged above and fixed through bolts, the length of the lower fixing shaft guide rail 45 is up to 10cm of the maximum length which can be stretched rightwards when the traction motor 41 is reset, the rightmost end of the lower fixing shaft guide rail 45 is fixed through a support shaft 46, the two fixing shaft guide rails 45 are parallel to the plane of the base, and the fixing shaft 47 is arranged between the two fixing shaft guide rails 45 and. The traction motor is fixed on the base platform, the output shaft 42 of the traction motor is erected on the traction motor 41, the output shaft 42 rotates along with the rotation of the traction motor 41, the output shaft 42 is correspondingly provided with a screw rod 43, the left end of the screw rod 43 is fixedly connected with a hinge 44, the hinge 44 is sleeved into a fixed shaft 47 in a ring sleeve mode, the hinge 44 is tightened after the fixed shaft 47 is sleeved, the fixed shaft 47 and the screw rod 43 are in a vertical relation, so that the fixed shaft 47 and the screw rod 43 move synchronously, the clamping jaws 82 are arranged at 1/3 positions from top to bottom and from bottom to top of the fixed shaft 47, the clamping jaws 82 are connected with the fixed shaft 47 through bolts, and different clamping jaws 82 can. When the traction motor starts to work, the traction motor output shaft 42 is driven to move, the traction motor output shaft 42 drives the screw rod 43 to move rightwards in a threaded engagement mode, and the hinge 44 at the left end of the screw rod 43 pulls the fixed shaft 47 so as to drive the clamping jaw 82 to move rightwards. The screw thread engagement is adopted, so that the pulling force applied by the traction motor is constant, and the straightening effect is improved.

The displacement detection module 7 adopts an M-DVRT free sliding type micro displacement sensor, the module is connected with a control system, and measurement data can be directly uploaded to an upper computer. The module is fixed at the upper end of the starting end of the screw rod 43, namely the upper end of the terminal capable of achieving left stretching, after the traction stretching device starts to work, the traction motor drives the traction motor output shaft 42 to move, the screw rod 43 is pulled to move rightwards through thread transmission, the displacement detection module starts to work from the beginning of the movement, and when the module moves to the required displacement, the upper computer sends an instruction, and the traction motor stops working.

As shown in fig. 6, the head of the clamping jaw 82 adopts a U-shaped groove 835 structure, a backing plate 836 is arranged on the inner side of the U-shaped groove, two intermediate rods 839 are fixed on the backing plate 836 through rotating bolts, an air cylinder 841 is arranged at the upper end of the two intermediate rods 839, a spring 834 is also arranged between the intermediate rods 839 and the wall of the U-shaped groove 835, the working rod 838 and the intermediate rods 839 are connected through a clamping groove buckle 832, the clamping jaw 82 is connected with a rotating shaft 833 through a supporting rod 840, and an angle detection module 837 is arranged above the supporting rod 840.

The supporting rod 840 is used for supporting the clamping jaw head, a rotating shaft 833 is arranged at the position of about 20cm away from the left end of the clamping jaw head and used for meeting the requirement of the rotation angle of the twisting head device, and an angle detection module is arranged at the position 5cm below the right of the rotating shaft 833 and above the supporting rod and connected with an upper computer to transmit angle data in real time.

When the clamping jaws 82 start to work after clamping the metal profile 3, the air cylinder 841 compresses to apply a force to the middle rod 839 perpendicular to the working rod 838, and the middle rod 839 applies a force to the working rod 838 perpendicular to the working rod 838 to clamp the metal profile, and the springs 834 on both sides are in a stretching state at the moment so as to prevent the metal profile from being damaged by excessive clamping force.

For better effect, the supporting rod 840 at the end of the twisting device 8 can be bent to a certain angle, and the supporting rod 840 at the end of the traction and stretching device 3 is horizontal.

The contact part of the clamping jaw 82 and the processed piece of the metal profile 3 to be straightened is in a saw-tooth 831 type structure, and the material of the clamping jaw is heat-resistant and high-strength steel.

The invention provides a straightening system method of a metal profile, which realizes the integration of twisting straightening, stretching forming and tension straightening, can also be used independently or in combination of any one of twisting straightening, stretching forming and tension straightening, and when the independent twisting straightening is needed, the metal profile to be processed is placed in an electric heating device; pushing the electric heating device and the twisting head device to proper positions, and fixing the hub by using a bolt; fixing the left end and the right end of the metal profile by using clamping jaws 82 respectively; the upper computer sets a proper temperature to heat the metal profile, the drawing device clamping jaw 82 fixes the metal profile immovably, and the twisting head device clamping jaw 82 drives the metal profile to rotate by a proper degree, so that twisting straightening is completed.

When separate stretch forming is required; the former three steps are kept unchanged, the twisting head device clamping jaws 82 are used for fixing the metal profiled bars, and the traction motor drives the screw rod 43 to pull the fixing shaft 47 to move rightwards to a required position.

When tension straightening is needed; keeping the previous three steps unchanged, fixing the left end and the right end by using the clamping jaws 82, and stretching the right end to a specified position by using the traction motor while twisting the left end; the moving displacement of the traction motor is in direct proportion to the tension to be applied; and (5) finishing the required requirements, and after naturally cooling for a certain time, removing the metal profile to finish straightening. The temperature of the metal profile in the heating power supply cabinet needs to be paid attention to constantly in the straightening process, the metal profiles made of different materials need to be heated to the specified temperature within 3min, and the temperature error is within +/-8 ℃.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a metal profile twisting straightening and drawing system which characterized in that: the device comprises a twisting head device (8), an electric heating device (2) and a traction stretching device (4), wherein the twisting head device (8) and the electric heating device (2) are positioned at two ends of the electric heating device (2), clamping jaws (82) are arranged at one ends of the twisting head device (8) and the electric heating device (2) close to the electric heating device (2), the left end and the right end of a metal profile (3) to be processed are respectively fixed by one clamping jaw (82), the metal profile (3) to be processed is fixed in the electric heating device (2), the metal profile can be driven to rotate by a proper degree by rotation of the clamping jaws (82) on the twisting head device (8), the metal profile can be driven to horizontally move outwards by translation of the clamping jaws (82) on the traction stretching device (4), an angle detection module (837) is arranged on the twisting head device (8), the electric heating device is provided with a temperature detection module, the traction stretching device is provided with a displacement detection module (7), the angle detection module (837), the temperature detection module, the displacement detection module (7) and the control module are connected, and the electric heating device further comprises an upper computer and a control module which are connected.

2. A metal profile twisting, straightening and drawing system according to claim 1, wherein: the electric heating device (2) is internally provided with an electric heating cabinet (24) and a heating coil (22), the outside of the electric heating device adopts a U-shaped heat preservation cover to preserve heat, and the temperature detection module is arranged on the inner wall of the U-shaped cover of the electric heating device.

3. A metal profile twisting, straightening and drawing system according to claim 1, wherein: the traction stretching device (4) comprises a base, a plurality of supports (5) are arranged on the base, a fixing rod which is vertical to each other is arranged between the two supports (5), the fixing rod is fixedly connected with the supports (5), a fixing shaft guide rail (45) is arranged at the center of the fixing rod, the left end and the right end of the upper fixing shaft guide rail (45) are matched and fixedly connected with two fixing shafts (47) which are arranged above, the rightmost end of the lower fixing shaft guide rail (45) is fixed by a support shaft (46), the two fixing shaft guide rails (45) are parallel to the plane of the base, the fixing shaft (47) is arranged between the two fixing shaft guide rails (45) and slides by adopting rollers, the traction motor (41) is fixed on a base platform, an output shaft (42) of the traction motor (41) is arranged on the traction motor (41), a screw rod (43) is arranged on the output shaft (42), and a hinge (44), the hinge (44) is sleeved into the fixed shaft (47) in a ring sleeve mode, the fixed shaft (47) and the screw rod (43) are in a vertical relation and move synchronously, a clamping jaw (82) of the traction and stretching device is arranged on the fixed shaft (47), the clamping jaw (82) is fixedly connected with the fixed shaft (47), and the displacement detection module (7) is fixed at the upper end of the starting end of the screw rod (43).

4. A metal profile twisting, straightening and drawing system according to claim 1, wherein: twist round first device (8) and include servo motor (1), clamping jaw (82) and twist round hydro-cylinder (81), servo motor (1) and metal profile shapes (3) end connection, clamping jaw (82) overcoat in metal profile shapes (3) tip, twist round hydro-cylinder (81) with servo motor (1), clamping jaw (82) are connected.

5. A system for twisting, straightening and drawing a metal profile according to any one of claims 1 to 4, wherein: a metal profile straightening pull-up system according to claim 1, characterized in that: twisting first device (8) and electric heater unit (2) bottom and installing gyro wheel (6), gyro wheel (6) center has the through-hole, and the base is equipped with base guide rail (9) (9), and base guide rail (9) (9) inner has the through-hole with gyro wheel (6) center the same size, and when the device reachd suitable position, use the bolt to link to each other two devices and fix.

6. A metal profile twisting, straightening and drawing system according to claim 5, wherein: the electric heating device (2) further comprises a base of the heating coil (22), and a base groove of the heating coil (22) is matched with the base guide rail (9).

7. A system for twisting, straightening and drawing a metal profile according to any one of claims 1 to 4 and 5, wherein: the clamping jaw (82) head adopts a U-shaped groove (835) structure, the inner side of the U-shaped groove is provided with a backing plate (836), two intermediate rods (839) are fixed on the backing plate (836) through rotating bolts, the upper ends of the two intermediate rods (839) are provided with air cylinders (841), springs (834) are also arranged between the intermediate rods (839) and the wall of the U-shaped groove (835), the working rod (838) and the intermediate rods (839) are connected through a clamping groove buckle (832), the clamping jaw (82) is connected with a rotating shaft (833) through a supporting rod (840), and an angle detection module (837) is arranged above the supporting rod (840).

8. A metal profile twisting, straightening and drawing system according to claim 7, wherein: the supporting rod (840) at the end of the twisting device (8) can be bent at a certain angle, and the supporting rod (840) at the end of the traction stretching device (3) is horizontal.

9. A metal profile twisting, straightening and drawing system according to claim 7, wherein: the contact part of the clamping jaw (82) and a workpiece of the metal profile (3) to be straightened is of a sawtooth (831) type structure, and the material of the clamping jaw is heat-resistant high-strength steel.

10. A method for twisting, straightening and stretching a metal profile comprises the following steps: the first step is as follows: putting a metal profile (3) to be processed into an electric heating device (2); the second step is that: fixing the left end and the right end of the metal profiled bar (3) by clamping jaws (82) respectively; the third step: the upper computer sets a proper temperature to heat the metal profile (3); the fourth step: if the single twisting and straightening is to be carried out, the step enters a fifth step, if the single pulling and shaping is to be carried out, the step enters a sixth step, and if the tension straightening is to be carried out, the step enters a seventh step; the fifth step: a clamping jaw (82) of the traction and stretching device (3) fixes the metal profiled bar (3) immovably, and the clamping jaw (82) of the twisting head device (8) drives the metal profiled bar (3) to rotate for a proper degree to finish twisting and straightening; and a sixth step: fixing the metal profile by using a clamping jaw (82) of the twisting head device (8), and driving a screw rod (43) to pull a fixed shaft (47) to move rightwards to a required position by a traction motor (41); the seventh step: after the left end and the right end are fixed by the clamping jaws (82), the left end is twisted, the right end is stretched by the traction motor (41) and pulled to a specified position, and the movement displacement of the traction motor (41) is in direct proportion to the tension required to be applied.