CN110935802A - Device for dieless hot forming or heat treatment of metal pipes - Google Patents
Device for dieless hot forming or heat treatment of metal pipes Download PDFInfo
- Publication number
- CN110935802A CN110935802A CN201911135138.1A CN201911135138A CN110935802A CN 110935802 A CN110935802 A CN 110935802A CN 201911135138 A CN201911135138 A CN 201911135138A CN 110935802 A CN110935802 A CN 110935802A
- Authority
- CN
- China
- Prior art keywords
- module
- metal pipe
- induction heating
- dieless
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a device for the dieless thermal forming or thermal treatment of metal pipes, which comprises a mechanical driving module, a mechanical driving module and a control module, wherein the mechanical driving module is provided with two rack push plates capable of moving along a straight line and is used for providing driving force for the deformation or movement of the metal pipes; the induction heating module is used for realizing local rapid heating of the metal pipe; the annular cooling module is used for realizing local rapid cooling of the metal pipe; the measurement feedback module is used for monitoring the temperature data of the metal pipe and the driving force data applied to the metal pipe, and performing feedback regulation on the working modes of the mechanical driving module, the induction heating module and the annular cooling module based on the temperature data and the driving force data; and the supporting and fixing module is used for supporting the mechanical driving module, the induction heating module, the annular cooling module and the measurement feedback module. The metal pipe dieless hot forming device provided by the embodiment of the invention can be used for the dieless stretching, dieless compression, gradient heat treatment and other processes of the metal pipe so as to realize the multifunctional rapid dieless hot forming and heat treatment.
Description
Technical Field
The invention relates to the technical field of metal pipe hot forming, in particular to a metal pipe die-free hot forming device which can also be used for carrying out heat treatment on metal pipes (bars), including gradient heat treatment.
Background
The metal pipe is a part which is widely applied in daily life and production, the miniature metal pipe is often applied to medicine injection and heat dissipation of electronic devices in the medical and electronic fields, and the diameter of the miniature pipe for injection and the diameter of the miniature heat pipe in a large-scale integrated circuit are generally less than 0.5mm, so that the metal pipe has higher requirements on the forming precision.
In the automobile industry, a metal corrugated pipe with a larger diameter-thickness ratio and a metal thick-wall pipe subjected to gradient heat treatment are commonly used as a buffering energy-absorbing element during vehicle collision; thick-walled bellows are also commonly used as bellows heat exchangers in the chemical and pressure vessel industries for the transfer of high pressure liquids. At present, the traditional forming methods of the metal corrugated pipe comprise a hydroforming method, a mechanical processing method, a rolling forming method, a welding forming method, a deposition forming method and the like, different forming dies need to be replaced for processing the metal corrugated pipe with different dimensions, and the process methods usually need a large-tonnage press and a complete sealing system, so that the forming equipment has a complex structure and is high in manufacturing cost. For the problem, scholars at home and abroad propose a method for forming the metal corrugated pipe without a mold, such as a continuous non-mold forming device with the publication number of CN106964680A, and the function of feeding and compressing is realized by matching a plurality of groups of clamping rollers; however, the structure of the clamping roller required by the device is complex, the clamping rollers of corresponding models need to be replaced for tube blanks with different diameters, and the roller heads on the clamping rollers provide axial compression force in a friction mode, so that scratches are easily caused, and the surface quality of the tube blanks is reduced.
In addition, with increasingly complex application scenes, the demand for the dissimilar metal pipe with the mechanical properties in gradient distribution is rising year by year, and specially customized equipment is often needed to realize the precisely controlled gradient heat treatment. For example, in the gradient heat treatment device for rod-shaped materials with publication number CN109797273A, a heating furnace is used as a heat source, and continuous temperature measurement is realized by moving a thermocouple, but in this way, the feedback speed of temperature measurement is slow, and no regulating system is provided, so that it is difficult to realize more accurate gradient heat treatment.
Therefore, there is a need for a simple, flexible and reliable apparatus for dieless forming and heat treatment of metal pipes.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and the device and provide a multifunctional device capable of realizing the metal pipe dieless stretching, dieless compression and gradient heat treatment forming technology. The device has the characteristics of stable motion, feedback adjustment, free assembly and the like, and can realize flexible, controllable, efficient and energy-saving rapid forming and heat treatment.
In order to solve the above technical problems, the present invention provides an apparatus for die-less hot forming or heat treatment of a metal pipe, comprising:
the mechanical driving module is provided with two rack push plates capable of moving along a straight line and is used for providing driving force for the deformation or movement of the metal pipe;
the induction heating module is used for realizing local rapid heating of the metal pipe;
the annular cooling module is used for realizing local rapid cooling of the metal pipe;
the measurement feedback module is used for monitoring the temperature data of the metal pipe and the driving force data applied to the metal pipe, and performing feedback regulation on the working modes of the mechanical driving module, the induction heating module and the annular cooling module based on the temperature data and the driving force data;
and the supporting and fixing module is used for supporting the mechanical driving module, the induction heating module, the annular cooling module and the measurement feedback module.
Preferably, the measurement feedback module comprises a computer, and a tension and pressure sensor and a thermal infrared imager which are respectively connected with the computer.
Preferably, the mechanical driving module further comprises a driving control unit connected with the computer and two groups of driving mechanisms connected with the driving control unit, and each group of driving mechanism comprises a power assembly and a transmission assembly connected with the power assembly and the rack push plate.
Preferably, power component includes servo motor, drive assembly supports including rotating and is in support lead screw on the fixed module and install lead screw nut in the frame push pedal, the lead screw with lead screw nut screw-thread fit, two among a set of actuating mechanism the lead screw passes through synchronous belt drive with a servo motor and is connected.
Preferably, the induction heating module comprises a heat source control unit connected with the computer, a high-frequency induction heating device connected with the heat source control unit, and an induction coil connected to the high-frequency induction heating device, wherein the induction coil surrounds the heating part of the metal pipe.
Preferably, the annular cooling module comprises a nozzle, a cooling regulation control unit connected with the computer, and a pressurizing pump and a regulating valve connected with the cooling regulation control unit.
Preferably, the annular cooling module still includes the hexagonal and removes the bracket component, and the hexagonal removes the bracket component including altitude mixture control pole, install in altitude mixture control piece on the altitude mixture control pole, be fixed in hexagonal on the altitude mixture control piece removes the support and install in radial adjustment piece on the hexagonal removal support, the nozzle set up in on the radial adjustment piece.
Preferably, the two rack push plates are provided with clamps for clamping the metal pipe, and the clamps on the two rack push plates are both thin three-jaw chucks; or the clamp on one rack push plate is a thin three-jaw chuck, and the clamp on the other rack push plate is an ejector pin.
Preferably, the supporting and fixing module comprises a rack, the rack comprises two rack side plates and a plurality of linear guide rods, the plurality of linear guide rods are fixed between the two rack side plates in parallel, and the two rack push plates are slidably arranged on the linear guide rods in a penetrating manner.
Preferably, the rack further comprises a rack bottom plate arranged below the rack side plates, a rear side plate and a front side plate connected between the rack side plates, a water collecting box arranged on the rack bottom plate, and a working platform arranged below the rack bottom plate.
Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:
the device for the dieless thermal forming or the thermal treatment of the metal pipe can realize the dieless stretching, dieless compression, local thermal treatment, gradient thermal treatment and other processes of the metal pipe so as to realize the rapid dieless thermal forming and the thermal treatment with multiple functions. Specifically, the device realizes the stable linear operation of the rack push plate by controlling the lead screw through the servo motor, and a plurality of linear motion modes are set; the high-frequency induction heating equipment is used as a heat source, so that local rapid heating of the metal pipe is realized; the annular cooling module is arranged to move along the axial direction and the radial direction of the pipe so as to adjust the cooling rate and the cooling effect of the metal pipe; the temperature change of the metal pipe is monitored in real time through the thermal infrared imager, and the change of the forming force is recorded in real time through the tension and pressure sensor, so that the device can be effectively prevented from being overheated or overloaded; meanwhile, the device is provided with a plurality of control units, feedback adjustment is carried out according to temperature data and forming force data transmitted by the thermal infrared imager and the tension and pressure sensor, motion parameters such as the motion speed and motion displacement of the push plate of the rack, heating parameters such as heating power and heating time, and cooling parameters such as cooling medium flow are changed, and accurate and reliable process parameter control is realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic view of the overall structure of the apparatus for the dieless hot forming or heat treatment of metal pipes according to the present invention;
FIG. 2 is a schematic diagram of a mechanical drive module according to the present invention;
FIG. 3 is a schematic diagram of the main functional modules of the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic structural view of the hexagonal traveling carriage assembly;
the device comprises a mechanical driving module, a servo motor, a speed reducer, a synchronous belt, a synchronous pulley, a tension block, a linear guide rod, a lead screw, a tension pulley, a lead screw fixing seat, a lead screw nut, a lead screw supporting seat, a rack push plate, a linear bearing, a thin three-jaw chuck and a thimble, wherein the mechanical driving module is 1, the servo motor is 101, the speed reducer is 102, the synchronous belt is 103, the synchronous pulley is 104, the tension block is 105, the linear guide rod is 106, the lead screw is 107, the tension pulley is 108;
2-induction heating module, 201-high frequency induction heating equipment, 202-induction coil;
3-annular cooling module, 301-height adjusting block, 302-height adjusting rod, 303-hexagonal movable support, 304-radial adjusting sheet, 305-nozzle;
4-measuring a feedback module, 401-pulling a pressure sensor, 402-infrared thermal imager;
5-supporting and fixing module, 501-working platform, 502-frame, 503-frame side plate, 504-frame bottom plate, 505-rear side plate, 506-front side plate, 507-water collecting box, 508-thermal imager bracket, 509-cold source bracket rod and 510-guide rod fastening nut.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
Referring to fig. 1-3, an apparatus for dieless hot forming or heat treatment of metal tubing of the present invention includes a mechanical drive module 1, an induction heating module 2, an annular cooling module 3, a measurement feedback module 4, and a support fixture module 5.
The mechanical driving module 1 is used for providing driving force for the deformation or movement of the metal pipe, and has two rack push plates 112 capable of moving along a straight line, and clamps for clamping the metal pipe are arranged on the two rack push plates 112, in the embodiment shown in fig. 4, the clamp on one rack push plate is a thin three-jaw chuck 114, and the clamp on the other rack push plate is a thimble 115, and the clamps can be used for the dieless compression thermoforming of the metal pipe; if the die-free drawing thermal forming machine is used for die-free drawing thermal forming of metal pipes, the clamps on the two rack push plates can be set to be thin three-jaw chucks 114.
Fig. 2 shows a schematic structural diagram of a mechanical drive module according to the present invention, which is mounted on a frame 502 supporting a fixed module. The frame 502 includes two frame side plates 503 and four linear guide rods 106, the four linear guide rods 106 are divided into two upper and lower rows and fixed between the two frame side plates in parallel, and the two ends are locked by guide rod fastening nuts 510 (see fig. 3). The two rack push plates 112 are slidably arranged on the four linear guide rods 106 in a penetrating manner, and the rack push plates 112 are provided with linear bearings 113 matched with the linear guide rods 106, so that the rack push plates 112 can stably and linearly move along the linear guide rods 106. The rack push plate 112 and the rack side plate 503 are both rectangular. Referring to fig. 2, specifically, the mechanical driving module 1 includes a driving control unit (not shown) and two sets of driving mechanisms connected to the driving control unit, the whole mechanical driving module 1 is symmetrically distributed, and the two sets of driving mechanisms are installed at the left and right sides of the device. Each group of driving mechanisms comprises a power assembly and a transmission assembly connected between the power assembly and the rack push plate 112, and the transmission assembly can transmit the driving force of the power assembly to the rack push plate 112. Furthermore, the power assembly comprises a servo motor 101, the transmission assembly comprises a lead screw 107 and a lead screw nut 110 fixed on a rack push plate 112, and the lead screw 107 is in threaded fit with the lead screw nut 110 to realize lead screw transmission. The four parallel lead screws 107 are divided into an upper row and a lower row, two ends of each lead screw 107 are respectively provided with a lead screw fixing seat 109 and a lead screw supporting seat 111, the lead screw fixing seats 109 and the lead screw supporting seats 111 are both fixed on the side plate 503 of the rack, and the lead screw fixing seats 109 and the lead screw supporting seats 111 are both bearing seats for rotatably supporting the lead screws 107 on the rack 502. Four lead screws 107 divide into two sets according to the diagonal, the left end that is located two lead screws 107 on a diagonal is fixed with synchronous pulley 104, and be connected with a left servo motor 101 transmission through hold-in range 103, consequently, servo motor 101 can drive these two lead screws 107 simultaneously and rotate, and be located and be equipped with two lead screw nuts 110 on a left frame push pedal 112 and cooperate with these two lead screws 107 respectively, and be located and be equipped with the through-hole on a right frame push pedal 112 and supply these two lead screws 107 to pass, consequently, these two lead screws 107 rotate and can drive a left frame push pedal 112 linear motion. Symmetrically, the right ends of two lead screws 107 on the other diagonal are fixed with synchronous pulleys 104, and are in transmission connection with a servo motor 101 on the right side through a synchronous belt 103, and can drive a rack push plate 112 on the right side to move linearly. To increase the output torque, the servo motor 101 may be connected with a reducer 102. The clamps on the two rack push plates 112 are arranged at the center position, so that the resultant force provided by the two lead screws 107 arranged along the diagonal is ensured to be superposed with the axis of the metal pipe to be processed, the bearing capacity of the rack push plates 112 is improved to the maximum extent, and the push plates are prevented from side turning.
Further, a tensioning block 105 is fixed on the side plate 503 of the frame, a tensioning wheel 108 is mounted on the tensioning block 105, and the tensioning wheel 108 is adjustably mounted on the tensioning block 105 for adjusting the tension of the synchronous belt 103 and ensuring the normal transmission of the synchronous belt 103.
The measurement feedback module 4 includes a computer (not shown), a tension and pressure sensor 401, and a thermal infrared imager 402. As shown in fig. 4, a tension and pressure sensor 401 may be disposed between the clamp and the rack push plate for measuring the tension or pressure applied to the metal pipe, and the tension and pressure sensor 401 is connected to the computer. As shown in fig. 3, the thermal infrared imager 402 may be mounted near the metal pipe to be processed through a thermal imager bracket 508 for collecting temperature data of the metal pipe, and the thermal infrared imager 402 is also connected to the computer.
It should be noted that the above-mentioned driving control unit is also connected with the computer in the measurement feedback module 4, and can drive multiple groups of driving mechanisms at the same time, so as to implement independent programmable control of two groups of driving mechanisms in the device, support the definition of multiple motion modes, and can respectively control the operation of the two rack push plates 112, thereby meeting the motion control requirements of the metal pipe in the non-mold forming and gradient heat treatment. Meanwhile, the drive control unit can control the servo motor 101 in three modes of position, speed and moment, has the characteristics of quick response, low speed, large torque, strong overload capacity, high reliability and the like, and can realize high-precision movement and positioning.
The induction heating module 2 is used for realizing local rapid heating of the metal pipe.
Specifically, the induction heating module 2 includes a heat source control unit, a high-frequency induction heating apparatus 201 connected to the heat source control unit, and an induction coil 202 connected to the high-frequency induction heating apparatus 201, and the induction coil 202 is wound around a heating portion of the metal pipe. The heat source control unit is connected with a computer in the measurement feedback module 4 to realize the regulation and control of the measurement feedback module 4 on the working mode of the induction heating module 2. And the heat source control unit can self-define parameters such as heating power, heating time, heat preservation power, heat preservation time and the like through computer programming, and meet the design requirements of various heating modes. The high-frequency induction heating device 201 heats by using the principle that a conductor generates induction current under the action of a high-frequency magnetic field, has the characteristics of rapid heating, energy conservation, high efficiency and the like, and has the function of timing heating. The high-frequency induction heating equipment 201 can be used with the induction coils 202 of multiple specifications in a matched mode, the number of turns and the inner diameter of the induction coils 202 are selected and replaced according to the heating width and the outer diameter required by machining of the pipe, the coils are connected with the high-frequency induction heating equipment through threads, and the high-frequency induction heating equipment is convenient to install and detach. The induction heating module 2 further comprises a water pump and a cooling water tank which are matched with the high-frequency induction heating equipment 201, the water pump and the cooling water tank take away heat in the high-frequency induction heating equipment 201 through circulating water, and overheating damage of the high-frequency induction heating equipment 201 is avoided. The induction heating module 2 is mounted on the support fixing module 5.
The annular cooling module 3 is used for realizing local quick cooling of the metal pipe, changing the temperature distribution of the metal pipe in the axial direction, controlling the width of a high-temperature area, supporting the use of various cooling media and simultaneously changing the cooling rate according to the process requirements. Further, the annular cooling module 3 includes a nozzle, a cooling regulation control unit, and a pressure regulating valve and a pressure pump respectively connected to the cooling regulation control unit, and the pressure pump, the pressure regulating valve and the nozzle are sequentially connected through a pipe for spraying a cooling medium (liquid or gas) to the metal pipe. The cooling regulation control unit is connected with a computer in the measurement feedback module 4 to realize the regulation and control of the measurement feedback module 4 on the working mode of the annular cooling module 3, regulate the pressure and the flow of the gas or liquid cooling medium and change the speed and the particle size of the jet medium. The booster pump provides injection pressure for the cooling medium, and the liquid storage tank is used for storing the liquid cooling medium. The annular cooling module 3 is also mounted on the support and fixing module 5.
Further, the annular cooling module further comprises a hexagonal moving bracket assembly surrounding the metal pipe, as shown in fig. 5, the hexagonal moving bracket assembly comprises a height adjusting rod 302, a height adjusting block 301 installed on the height adjusting rod 302, a hexagonal moving bracket 303 installed on the height adjusting block 301, and a radial adjusting plate 304 installed on the hexagonal moving bracket 303, and the nozzle 305 is disposed on the radial adjusting plate 304. The hexagonal moving support assemblies are preferably two groups and are respectively arranged on two sides of the induction coil 202, and the upper end of the height adjusting rod 302 can be hung on the cold source support rod 509 (see fig. 3), so that the hexagonal moving support assemblies can freely move in the axial direction of the metal pipe, the distance between a cold source and a heat source is conveniently changed, and the temperature field distribution in the axial direction of the metal pipe is controlled. At most 12 nozzles 305 can be uniformly arranged on the hexagonal movable support 303 to realize uniform cooling of the pipe in the circumferential direction, and the number of the nozzles 305 can be determined according to the cooling requirement. The nozzle 305 is a replaceable part, and different cooling media are selected according to process requirements and then replaced by the nozzle 305 for spraying the corresponding cooling media, so that multiple functions of air injection/spraying/liquid spraying and the like are supported. The height adjusting block 301 can adjust the length of the height adjusting rod 302 based on the thickness of the metal pipe, so as to adjust the height of the hexagonal movable support 303; the radial adjustment tabs 304 can adjust the distance of the nozzle 305 from the surface of the pipe in the radial direction, thereby changing the cooling rate. The annular cooling module 3 may also comprise a filter which filters out impurities in the cooling medium and avoids clogging of the nozzles.
The measurement feedback module 4 is used for monitoring temperature data of the metal pipe in a forming process or a heat treatment process and driving force data exerted on the metal pipe, and performing feedback adjustment on working modes of the mechanical driving module 1, the induction heating module 2 and the annular cooling module 3 based on the temperature data and the driving force data.
The thermal infrared imager 402 can record the temperature distribution change of the surface of the metal pipe, and the tension and pressure sensor 401 can record the axial tension or pressure change of the pipe when the pipe is fed. When the device works, the thermal infrared imager 402 and the tension and pressure sensor 401 transmit temperature data and pressure data to the data acquisition card, and the data acquisition card transmits the acquired data to the computer. And the computer records and stores experimental data in real time, so that the subsequent process analysis and optimization are facilitated. The computer carries out real-time feedback regulation according to the received temperature data and pressure data and preset process requirements, and sends commands to the driving control unit, the heat source control unit and the cooling regulation control unit to adjust the working parameters of the servo motor 101, the high-frequency induction heating equipment 201 and the pressurizing pump, so that the preset process parameters are gradually approached, and the die-free hot forming and the accurate control of the heat treatment of the metal pipe are realized. The measurement feedback module 4 is also mounted on the support fixture module 5.
The supporting and fixing module 5 is used for supporting the mechanical driving module 1, the induction heating module 2, the annular cooling module 3 and the measurement feedback module 4.
As shown in fig. 2-4, the rack 502 further includes a rack bottom plate 504 disposed under the rack side plates 503, a front side plate 506 and a rear side plate 505 connected between the two rack side plates 503, a water collection box 507 disposed on the rack bottom plate 504, and a work platform 501 disposed under the rack bottom plate 504. The working platform 501 may contain the computer, the pressure pump, the water pump, the cooling water tank, and the like. The water collecting box 507 is used for collecting waste water and liquid, and is provided with a drain pipe to be directly discharged outside the apparatus. The front side plate 506 and the rear side plate 505 can be made of splash-proof glass, so that the sprayed liquid medium is prevented from being sprayed to the surrounding to pollute the environment, and operators are protected.
The operation of the apparatus of the present invention for the dieless thermal compression process is described in detail below with reference to specific embodiments.
Firstly, selecting proper selectable parts in the metal pipe die-free hot forming device according to requirements, and installing the metal pipe to be processed.
In particular, for the convenience of clamping, the metal pipe clamp selects a thin three-jaw chuck 114 and a conical thimble 115; the thin three-jaw chuck 114 and the conical thimble 115 are used for clamping a metal pipe (for a thin pipe, a clamping mandrel matched with the inner diameter of the metal pipe can be plugged into the end of the metal pipe to prevent clamping deformation). Meanwhile, the induction coil 202 with a proper size is selected according to the diameter of the processed pipe and the required heating width.
Secondly, setting forming process parameters.
Specifically, according to the process requirements, induction heating parameters such as heating power, working time, heat preservation power, heat preservation time, critical point temperature and the like are set on a heat source control unit through a computer; the moving direction, the moving speed and the moving displacement of the two rack push plates 112 are set on the driving control unit through a computer; and the maximum alarming pressure is set on the computer, when the axial pressure of the metal pipe monitored by the tension pressure sensor 401 reaches the value, the computer can drive the servo motor 101 to stop rotating through the driving control unit, so that the phenomenon that the device is overloaded due to excessive compression is prevented.
Finally, the metal pipe is subjected to dieless hot compression forming.
The computer controls the heat source control unit to drive the high-frequency induction equipment to start working, the temperature of the heating part of the metal pipe corresponding to the induction coil 202 rises rapidly, the thermal infrared imager 402 irradiates and captures the temperature change of the surface of the heating part of the metal pipe, and the monitored temperature data is transmitted to the computer through the measurement feedback control unit. When the temperature of the heating part of the metal pipe exceeds the preset critical point temperature, the computer sends a starting command to the servo motor 101 through the drive control unit, then the servo motor 101 starts to operate, the rotating speed is reduced through the speed reducer 102, and the output torque is improved; the linear motion of the rack push plate 112 is driven through the transmission of a synchronous belt 103 and a lead screw 107 in sequence, and the two servo motors 101 control the motion of one rack push plate 112 respectively.
It should be noted that, the motion parameters of the two rack push plates 112 can be preset in a computer, and if the motion speed of the left rack push plate is set as V1 and the motion speed of the right rack push plate is set as V2, where V1> V2 and the directions are the same, the metal pipe will be continuously extruded while being rapidly heated in the induction coil 202, so as to form continuous corrugations; meanwhile, the speed of the left side rack push plate is set to be V1 in a time period of 0-t, the speed of the right side rack push plate is set to be 0 in a time period of 0-0.5 t, and the speed of the right side rack push plate is set to be V1 in a time period of 0.5 t-t, so that the heating-extruding-translating non-mold forming step is realized.
The metal pipe heating part corresponding to the induction coil 202 is heated and then rapidly softened, and the metal pipe is outwardly bent under the action of the axial pressure of the rack push plate 112 to generate transverse ripples. Because the push plates 112 of the machine frames on the two sides move in the same direction, the metal pipe is in continuous movement, the pipe in the corrugated area enters the annular cooling working area after being deformed, and under the action of the nozzles 305 which are annularly arranged, the pipe in the deformed part is rapidly cooled and shaped, and the pipe does not deform any more after the strength is increased. The two hexagonal movable bracket assemblies can be arranged on the cold source bracket rod 509 along the axial direction of the pipe, and the width and the temperature distribution of the high-temperature region can be controlled by adjusting the distance between the nozzle and the induction coil 202. Meanwhile, the distance between the standard nozzle 305 and the surface of the pipe can be changed by adjusting the position of the radial adjusting sheet 304, so that the cooling rate is adjusted. In addition, the computer controls the regulating valve through the cooling regulation control unit to change the flow of the cooling medium so as to regulate the cooling rate.
When the nozzle 305 adopts a water spray nozzle, in order to prevent splashing, splash-proof glass plates are respectively arranged on the front side and the rear side of the device, wherein the front glass plate is designed into the combination of a movable door and a threshold, the movable door can be opened to normally operate when the metal pipe is clamped and unloaded, the movable door must be closed in the workpiece forming process and locked, and the personal safety of operators is guaranteed. A water collecting box 507 is arranged between the bottom of the rack push plate 112 and the rack bottom plate 504, the size of the water collecting box 507 is basically consistent with the bottom space enclosed by the front side plate, the rear side plate and the rack side plate 503, a through hole is arranged on the rack bottom plate 504, and a drain pipe is arranged at the bottom of the water collecting box 507 and discharges waste water in time through the hole.
During the forming process, the tension pressure sensor 401 and the thermal infrared imager 402 record the pressure and temperature changes during the whole process and transmit the data to a computer for subsequent data analysis and process adjustment.
The embodiment describes a dieless hot-pressing process, but the device can also be used for a dieless hot-drawing process, the thimble 115 in the metal pipe clamp is also replaced by a thin three-jaw chuck 114, and then the moving speed of the two push plates (making V1< V2) and the heating and cooling mode are adjusted according to the process requirements, and the forming process is similar to hot-pressing.
The operation of the apparatus of the present invention for gradient heat treatment is further described in detail below with reference to specific embodiments.
The working steps of the gradient heat treatment process are substantially the same as the dieless thermal compression process, which differs from the dieless thermal compression process as follows.
In the gradient heat treatment process, when the motion parameters of the two mechanical push plates are set, the motion directions, the motion speeds and the motion displacements of the two push plates are kept to be the same, and the metal pipe is translated to a proper position in the induction coil 202 and then stopped from rotating by the motor. The dimensions of the induction coil 202 are also selected according to the dimensions of the tube and the heating width, and the nozzles of the annular cooling module 3 are fixed in position at the ends of the tube.
The computer needs to preset the target temperature TH and the heat preservation time t which need to be heated. When the induction heating module 2 heats the heated part of the metal pipe, the thermal infrared imager 402 monitors the surface temperature change of the heated part of the metal pipe and transmits the temperature data to the computer. When the computer recognizes that the actual surface temperature T1 of the metal pipe reaches the target temperature TH, the heat source control unit sends a command to the high-frequency induction heating equipment 201 to adjust the heating power and then enters a heat preservation mode. And then the computer controls the pressurizing pump to be started through the cooling regulation control unit, regulates the flow of the cooling medium to reach a preset value through the regulating valve, and sprays water or sprays air to the unheated part of the end part of the metal pipe to reduce the temperature to the cooling target temperature TL. At the moment, the induction heating module 2 and the annular cooling module 3 are both in an opening state, so that the temperature field in the axial direction of the metal pipe is in gradient distribution.
In the whole gradient heat treatment process, the thermal infrared imager 402 and the computer are always in a working state, the temperature distribution of the surface of the metal pipe is monitored in real time, and automatic feedback adjustment is performed according to a program. After the pressure pump is started, the temperature of the surface of the metal pipe is reduced as a whole, and when the infrared thermal imager 402 monitors that the temperature T1 of the high-temperature region is lower than the set heating target temperature TH, the computer sends a command to the high-frequency induction heating device 201 through the heat source control unit, so that the power is increased to increase the induced current, and the temperature T1 of the high-temperature region approaches to TH. When the thermal infrared imager 402 monitors that the temperature T2 of the low-temperature region at the end of the pipe is higher than the set cooling target temperature TL, the computer sends an adjustment command to the adjusting valve through the cooling adjustment control unit, and the water flow or the air flow is increased to improve the cooling rate, so that the temperature at the end of the pipe gradually approaches TL. Therefore, the device can perform automatic feedback adjustment through the temperature data monitored and transmitted by the thermal infrared imager 402, adjust the working states of the high-frequency induction heating equipment 201 and the adjusting valve, control the heating and cooling effects, stably keep the temperatures of the high-temperature area and the end cooling area of the metal pipe at the target temperature, and realize the gradient heat treatment process.
The device for the dieless thermal forming or the thermal treatment of the metal pipe can be used for the dieless stretching, the dieless compression, the local thermal treatment, the gradient thermal treatment and other processes of the metal pipe so as to realize the rapid dieless thermal forming and the thermal treatment with multiple functions. Specifically, the device realizes the stable linear operation of the rack push plate by controlling the lead screw through the servo motor; the high-frequency induction heating equipment 201 is used as a heat source, so that local rapid heating of the metal pipe is realized; the annular cooling module 3 is arranged to move along the axial direction and the radial direction of the metal pipe, so that the cooling rate and the cooling effect of the metal pipe are adjusted; the temperature change of the metal pipe is monitored in real time through the thermal infrared imager 402, and the change of the forming force is recorded in real time through the tension and pressure sensor 401, so that the device can be effectively prevented from being overheated or overloaded; meanwhile, the device is provided with a plurality of control units, feedback adjustment is carried out according to temperature data and forming force data transmitted by the thermal infrared imager 402 and the tension and pressure sensor 401, and the motion parameters of a push plate of the rack, such as motion speed and motion displacement, heating parameters of a heat source, such as heating power and heating time, and cooling parameters of a cooling medium, such as flow rate, are changed, so that accurate and reliable process parameter control is realized.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An apparatus for die-less hot forming or heat treating of metal tubing, comprising:
the mechanical driving module is provided with two rack push plates capable of moving along a straight line and is used for providing driving force for the deformation or movement of the metal pipe;
the induction heating module is used for realizing local rapid heating of the metal pipe;
the annular cooling module is used for realizing local rapid cooling of the metal pipe;
the measurement feedback module is used for monitoring the temperature data of the metal pipe and the driving force data applied to the metal pipe, and performing feedback regulation on the working modes of the mechanical driving module, the induction heating module and the annular cooling module based on the temperature data and the driving force data;
and the supporting and fixing module is used for supporting the mechanical driving module, the induction heating module, the annular cooling module and the measurement feedback module.
2. The apparatus for the die-less thermoforming or thermal treatment of metal tubing of claim 1, wherein the measurement feedback module comprises a computer, and a tension pressure sensor and a thermal infrared imager respectively connected to the computer.
3. The apparatus of claim 2, wherein the mechanical drive module further comprises a drive control unit connected to the computer and two sets of drive mechanisms connected to the drive control unit, each set of drive mechanisms comprising a power assembly and a transmission assembly connecting the power assembly to a frame pusher.
4. The apparatus according to claim 3, wherein the power assembly comprises a servo motor, the transmission assembly comprises a lead screw rotatably supported on the support fixing module and a lead screw nut mounted on the rack pushing plate, the lead screw is in threaded fit with the lead screw nut, and two lead screws in a set of driving mechanisms are in transmission connection with one servo motor through a synchronous belt.
5. The apparatus for the die-less thermoforming or heat treatment of metal tubing of claim 2, wherein the induction heating module comprises a heat source control unit connected with the computer, a high frequency induction heating device connected with the heat source control unit, and an induction coil connected to the high frequency induction heating device, the induction coil surrounding a heating location of the metal tubing.
6. The apparatus for die-less hot forming or heat treating of metal pipes according to claim 2, wherein the annular cooling module comprises a nozzle, a cooling regulation control unit connected to the computer, and a pressurizing pump and a regulating valve connected to the cooling regulation control unit.
7. The apparatus of claim 6, wherein the annular cooling module further comprises a hexagonal moving bracket assembly, the hexagonal moving bracket assembly comprises a height adjusting rod, a height adjusting block mounted on the height adjusting rod, a hexagonal moving bracket fixed on the height adjusting block, and a radial adjusting plate mounted on the hexagonal moving bracket, and the nozzle is disposed on the radial adjusting plate.
8. The dieless thermoforming device of claim 1, wherein the two rack push plates are provided with clamps for clamping the metal tube, and the clamps on the two rack push plates are both thin three-jaw chucks; or the clamp on one rack push plate is a thin three-jaw chuck, and the clamp on the other rack push plate is an ejector pin.
9. The apparatus of claim 1, wherein the support fixture module comprises a frame, the frame comprises two frame side plates and a plurality of linear guide rods, the plurality of linear guide rods are fixed between the two frame side plates in parallel, and the two frame push plates are slidably disposed through the linear guide rods.
10. The apparatus of claim 9, wherein the frame further comprises a frame bottom plate disposed below the frame side plates, a rear side plate and a front side plate connected between the frame side plates, a water collection box disposed on the frame bottom plate, and a work platform disposed below the frame bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911135138.1A CN110935802B (en) | 2019-11-19 | 2019-11-19 | Device for dieless hot forming or heat treatment of metal pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911135138.1A CN110935802B (en) | 2019-11-19 | 2019-11-19 | Device for dieless hot forming or heat treatment of metal pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110935802A true CN110935802A (en) | 2020-03-31 |
| CN110935802B CN110935802B (en) | 2021-01-05 |
Family
ID=69907663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911135138.1A Active CN110935802B (en) | 2019-11-19 | 2019-11-19 | Device for dieless hot forming or heat treatment of metal pipes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110935802B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981080A (en) * | 2021-02-04 | 2021-06-18 | 燕山大学 | Copper pipe on-line production heat treatment device and process thereof |
| CN114350920A (en) * | 2022-03-18 | 2022-04-15 | 南通铁人运动用品有限公司 | Equipment and production process for improving flaring bending deformation resistance of metal pipe |
| CN115125370A (en) * | 2022-07-21 | 2022-09-30 | 燕山大学 | Large-scale internal corrugated shell ring local continuous induction heat supplementing device and working method thereof |
| CN115418453A (en) * | 2022-08-30 | 2022-12-02 | 湖南大学 | Processing system and method for locally and uniformly strengthening and weakening energy absorption structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010214451A (en) * | 2009-03-18 | 2010-09-30 | Tokyo Metropolitan Univ | Tube working device and tube working method |
| WO2011162376A1 (en) * | 2010-06-24 | 2011-12-29 | 公立大学法人首都大学東京 | Pipe machining device and method |
| CN103394532A (en) * | 2013-08-22 | 2013-11-20 | 西北有色金属研究院 | Continuous hot-drawing forming method for nickel-titanium alloy pipe |
| CN104858278A (en) * | 2015-05-26 | 2015-08-26 | 东北大学 | Die-free metal corrugated tube forming process method |
| CN206153524U (en) * | 2016-11-08 | 2017-05-10 | 烟台孚信达双金属股份有限公司 | A secondary spraying and cooling device for continuous casting copper -aluminum composite material |
-
2019
- 2019-11-19 CN CN201911135138.1A patent/CN110935802B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010214451A (en) * | 2009-03-18 | 2010-09-30 | Tokyo Metropolitan Univ | Tube working device and tube working method |
| WO2011162376A1 (en) * | 2010-06-24 | 2011-12-29 | 公立大学法人首都大学東京 | Pipe machining device and method |
| CN103394532A (en) * | 2013-08-22 | 2013-11-20 | 西北有色金属研究院 | Continuous hot-drawing forming method for nickel-titanium alloy pipe |
| CN104858278A (en) * | 2015-05-26 | 2015-08-26 | 东北大学 | Die-free metal corrugated tube forming process method |
| CN206153524U (en) * | 2016-11-08 | 2017-05-10 | 烟台孚信达双金属股份有限公司 | A secondary spraying and cooling device for continuous casting copper -aluminum composite material |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981080A (en) * | 2021-02-04 | 2021-06-18 | 燕山大学 | Copper pipe on-line production heat treatment device and process thereof |
| CN112981080B (en) * | 2021-02-04 | 2021-11-23 | 燕山大学 | Copper pipe on-line production heat treatment device and process thereof |
| CN114350920A (en) * | 2022-03-18 | 2022-04-15 | 南通铁人运动用品有限公司 | Equipment and production process for improving flaring bending deformation resistance of metal pipe |
| CN114350920B (en) * | 2022-03-18 | 2022-05-24 | 南通铁人运动用品有限公司 | Equipment and production process for improving flaring bending deformation resistance of metal pipe |
| CN115125370A (en) * | 2022-07-21 | 2022-09-30 | 燕山大学 | Large-scale internal corrugated shell ring local continuous induction heat supplementing device and working method thereof |
| CN115125370B (en) * | 2022-07-21 | 2023-06-09 | 燕山大学 | Local continuous induction heat supplementing device for large-scale inner corrugated cylinder section and working method thereof |
| CN115418453A (en) * | 2022-08-30 | 2022-12-02 | 湖南大学 | Processing system and method for locally and uniformly strengthening and weakening energy absorption structure |
| CN115418453B (en) * | 2022-08-30 | 2023-11-24 | 湖南大学 | Treatment system and method for locally and uniformly strengthening and weakening energy absorption structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110935802B (en) | 2021-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110935802B (en) | Device for dieless hot forming or heat treatment of metal pipes | |
| CN102925632A (en) | Vertical high-frequency quenching machine | |
| CN104878188A (en) | Experimental facility and experiment method for realizing air cushion type heat treatment of aluminum strips | |
| CN107309318B (en) | Plate radial direction differential temperature spinning apparatus and process | |
| CN102888497A (en) | Numerical control high-frequency quenching device | |
| CN216359259U (en) | Full-automatic energy-saving environment-friendly aluminum profile extrusion production line | |
| CN110052526B (en) | Threaded pipe machining device and method | |
| CN103920985A (en) | Fast preheating unit for thin-walled pipe type part axial friction welding | |
| CN210104006U (en) | Roller surface quenching equipment | |
| CN111500827B (en) | High-frequency quenching process method for slender inner hole | |
| CN211053089U (en) | Tool for processing copper electrode | |
| CN216427340U (en) | Quenching device for processing barbed nail roll shaft | |
| CN210174185U (en) | Automatic molding equipment for polytetrafluoroethylene corrugated pipe | |
| CN108262360B (en) | Annular hole type rolling hollow section bar preparation device | |
| CN205148201U (en) | Flat bank of tubes pipe equipment of biax car condenser / radiator / intercooler | |
| CN219526738U (en) | Heat treatment device for working surfaces of different materials of roller core rod | |
| CN112718983A (en) | Device and method for bending spiral coil by lathe | |
| CN110814184A (en) | Intelligent control system for metal pipe dieless hot forming | |
| CN214826898U (en) | Bottle feeding spiral servo driving device | |
| CN117358840B (en) | Efficient energy-saving numerical control induction heater for elbow pushing and forming | |
| CN117066467B (en) | Device and method for correcting radius of roller way of bending section of continuous casting machine | |
| CN110592353A (en) | Mold processing device capable of preventing mold deformation | |
| CN115747427B (en) | Destressing annealing method and system | |
| CN219788991U (en) | Improvement device of film thickness homogeneity | |
| CN112570579B (en) | Forming device and method for realizing pipe end necking thickening by accurately controlling temperature in different areas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |