An intermediate-frequency high-temperature hot die machine

Abstract

The present invention discloses an intermediate frequency high-temperature hot die machine. An intermediate frequency high-temperature hot die machine includes a die pressing mechanism, a heating mechanism, and a data module. The die pressing mechanism is used for pressing and forming a blank. The heating mechanism is located outside the die pressing mechanism and is used for heating the die pressing mechanism. The data module is electrically connected to the die pressing mechanism and the heating mechanism respectively. The data module is used for detecting the real-time states of the die pressing mechanism and the heating mechanism, judging the detected data information, and controlling the die pressing mechanism and the heating mechanism according to the judgment result to drive the die pressing mechanism and the heating mechanism to form the blank. The die pressing mechanism includes a driving cylinder, and the top of the driving cylinder is drivingly connected with a driving connecting rod. One side of the driving connecting rod is fixedly installed with a supporting connecting rod. The present invention has the characteristics of being easy to disassemble and extending the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature die forging, and particularly to an intermediate-frequency high-temperature hot die machine. Background Art

[0002] Forging is a processing method that uses forging machinery to apply pressure to metal blanks, causing them to undergo plastic deformation to obtain forgings with certain mechanical properties, certain shapes, and dimensions. It is one of the components of forging and pressing (forging and stamping). Forging processing can ensure that parts have good mechanical properties and long service lives. Forgings produced using processes such as precision die forging, cold extrusion, and warm extrusion are incomparable to castings.

[0003] The starting recrystallization temperature of steel is approximately 727°C, but generally 800°C is used as the dividing line. Hot forging is above 800°C, warm forging or semi-hot forging is between 300 - 800°C, and cold forging is carried out at room temperature. Most forgings used in various industries are hot forgings.

[0004] An intermediate-frequency high-temperature hot die machine is a processing equipment that uses die forging to form workpieces to be processed at high temperatures. Among them, the principle of intermediate-frequency induction heating is electromagnetic induction. The specific heating principle is as follows: When the magnetic flux enclosed by a conductor loop changes, an induced electromotive force will be generated in the loop. Similarly, a conductor in an alternating magnetic field also generates an induced electromotive force under the action of electromagnetic induction, forming an induced current (eddy current) in the conductor. The induced current overcomes the resistance of the conductor itself to generate Joule heat, using this heat to heat the conductor itself, raising its temperature and melting it to achieve the purpose of various hot processing. Since this heating method has a fast heating rate, there is very little oxidation, high heating efficiency, and good process repeatability.

[0005] During the use of existing intermediate-frequency high-temperature hot die machines, in order to ensure that the processing temperature of the workpiece reaches the expected value, it is often necessary to heat the upper and lower dies. Among them, the lower die is installed on the base, and it is relatively convenient to heat it. Even if the temperature changes greatly, it will not cause great damage to the lower die. However, the upper die needs to be installed in cooperation with the equipment. When the temperature of the upper die changes greatly, it will cause certain damage to its installation structure, thereby shortening the service life of the equipment. At the same time, when forming different workpieces, the required upper and lower dies and supporting heating equipment are different, and the upper and lower dies still have a certain temperature after processing and cannot be disassembled immediately. When users form different workpieces, it is inconvenient to disassemble and assemble the installed upper and lower dies and supporting heating equipment. Therefore, it is very necessary to design an intermediate-frequency high-temperature hot die machine that is easy to disassemble and has an extended service life. Summary of the Invention

[0006] The purpose of the present invention is to provide an intermediate-frequency high-temperature hot die machine to solve the problems raised in the above background art.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a medium-frequency and high-temperature hot mold machine, comprising a die pressing mechanism, a heating mechanism and a data module, wherein the die pressing mechanism is used to press-form the blank, the heating mechanism is located on the outside of the die pressing mechanism, the heating mechanism is used to heat the die pressing mechanism, the data module is electrically connected to the die pressing mechanism and the heating mechanism respectively, the data module is used to detect the real-time status of the die pressing mechanism and the heating mechanism, judge the detected data information, and control the die pressing mechanism and the heating mechanism according to the judgment result, so as to drive the die pressing mechanism and the heating mechanism to form the blank.

[0008] According to the above technical scheme, the die pressing mechanism includes a driving cylinder, the top of the driving cylinder is transmission-connected with a driving connecting rod, one side of the driving connecting rod is fixedly installed with a supporting connecting rod, the end of the supporting connecting rod is installed with a fixing connecting rod, an upper mold is arranged at the bottom of the fixing connecting rod, a temperature sensor is arranged inside the upper mold, a limiting groove is arranged at the bottom of the upper mold, a lower mold is arranged inside the limiting groove, a fixing groove is opened inside the upper mold, a flexible bag is arranged on the inner wall of the fixing groove, an air delivery port is opened at the bottom of the fixing groove, a transmission pump is arranged on the outer side of the upper mold, and the output end of the transmission pump is connected with the terminal pipeline of the air delivery port. When the hot mold machine is in use, the limiting groove is used to limit the lower mold, and the fixing groove is used to fix the upper mold through the flexible bag. Specifically, the friction force generated by the flexible bag at room temperature will fix the outer surface of the fixing connecting rod. The upper mold is initially fixed, and the flexible bag will fix the fixed connecting rod more firmly after being heated and expanded, and at the same time, the coaxiality of the fixed connecting rod can be ensured to prevent the upper mold from tilting during the subsequent molding process. The transmission pump is used to transport the gas at the bottom of the fixed groove through the gas delivery port. Specifically, when the upper mold needs to be fixed, the fixed connecting rod needs to be installed inside the fixed groove. At this time, the transmission pump draws out the gas at the bottom of the fixed groove through the gas delivery port. The negative pressure generated at this time will suck the fixed connecting rod to the bottom of the fixed groove and fix the fixed connecting rod. When the upper mold needs to be replaced, the fixed connecting rod needs to be removed from the inside of the fixed groove to the outside. After the upper mold is cooled, the gas inside the flexible bag will cool down and reset, and the transmission pump will input external gas into the bottom of the fixed groove through the gas delivery port, and push the fixed connecting rod outward by the force generated by the gas compression, so as to disassemble the fixed connecting rod.

[0009] According to the above technical solution, the heating mechanism includes a fixed column. A sliding groove is formed inside the fixed column, and an electric control slider is slidably connected to the inside of the sliding groove. An output cylinder is arranged on the top of the electric control slider. The output end of the output cylinder is drivingly connected to an output connecting rod. An electric appliance is arranged at the end of the output connecting rod. An outer heating coil is electrically connected to the bottom of the electric appliance, and an inner heating coil is electrically connected to the top of the electric appliance. The outer heating coil is installed outside the inner heating coil. When the hot die machine is in use, the electric appliance is used to energize the outer heating coil and the inner heating coil, increase the temperatures of the outer heating coil and the inner heating coil, and heat the upper die through the temperatures of the outer heating coil and the inner heating coil.

[0010] According to the above technical solution, the data module includes a detection unit. The detection unit is electrically connected to a judgment unit, and the judgment unit is electrically connected to a control unit. The detection unit is located inside the temperature sensor. The detection unit is used to detect the temperature of the upper die through the temperature sensor and transmit the detected data information to the judgment unit. The judgment unit is used to judge the received data information and transmit the judgment result to the control unit. The control unit is electrically connected to the driving cylinder, the transfer pump, the electric control slider, the output cylinder and the electric appliance. The control unit is used to control the driving cylinder, the transfer pump, the electric control slider, the output cylinder and the electric appliance through the received data information to heat the upper die.

[0011] According to the above technical solution, the working steps of the hot die machine are as follows:

[0012] Step A: Push the lower die required for blank forming inward through the limiting groove until it is fixed by the limiting groove, and heat the processing groove of the lower die.

[0013] Step B: Place the blank to be processed inside the lower die. At this time, the heated lower die will heat the blank.

[0014] Step C: Install the upper die required for blank forming at the bottom of the fixed connecting rod.

[0015] Step D: Install the inner heating coil and the outer heating coil required for the upper die at the output end of the electric appliance.

[0016] Step E: The control unit drives the electric control slider to slide inside the sliding groove, drives the output cylinder to move, and drives the electric appliance to move through the output connecting rod, and moves the inner heating coil to the outside of the bottom of the upper die.

[0017] Step F: The control unit drives the electrical conveyor to work, increasing the temperatures of the inner heating coil and the outer heating coil to heat the upper mold. During this process, the detection unit and the judgment module detect and judge the temperatures of the inner heating coil and the outer heating coil, and adjust the output temperature of the electrical conveyor.

[0018] Step G: After the temperature of the upper mold reaches the expectation, the control unit shuts down the electrical conveyor and drives the inner heating coil to move away from the upper mold.

[0019] Step H: The control unit drives the driving cylinder to work, drives the supporting connecting rod to move through the driving connecting rod, further drives the fixed connecting rod to move, and pushes the upper mold to move in the vertical direction through the fixed connecting rod to form the blank to be processed inside the lower mold.

[0020] Step I: After the blank forming is completed, the control unit drives the driving cylinder to work, moves the upper mold to the top, disassembles the upper mold after the temperature drops, and at the same time slides the lower mold outwards along the limit groove to collect the blank formed inside the lower mold.

[0021] According to the above technical solution, in the said Step F, the specific heating steps are as follows:

[0022] Step F1: The control unit drives the electrical conveyor to work at the rated power, energizes the outer heating coil to increase its temperature, and heats the upper mold through the outer heating coil.

[0023] Step F2: During the heating process of the outer heating coil, the detection unit detects the temperature of the upper mold, records the real-time temperature of the upper mold as Q 实 , records the temperature to which the upper mold needs to be heated as Q 标 , and transmits this data information to the judgment unit.

[0024] Step F3: The judgment unit judges the received data information and transmits the judgment result to the control unit.

[0025] Step F4: The control unit controls the electrical conveyor according to the received data information and adjusts the output temperatures of the inner heating coil and the outer heating coil.

[0026] According to the above technical solution, in the said Step F3, the specific judgment process is as follows:

[0027] When Q 实 <0.5Q 标 , at this time the temperature of the upper mold is low and not fully fixed, and at the same time the temperature of the upper mold cannot form the blank. It is judged that it is necessary to continue heating the upper mold through the outer heating coil;

[0028] When Q实 ≥0.5Q 标 When it is ≥0.5Q, at this time, the temperature of the upper die is high and it has been preliminarily fixed. At the same time, the change in the temperature of the upper die rising to the required temperature is small. It is judged that it is necessary to energize the inner heating coil through the power transmitter at the rated output power to increase the temperature of the inner heating coil, and heat the upper die through the inner heating coil.

[0029] According to the above technical solution, the coil density of the inner heating coil is higher than that of the outer heating coil. When the inner heating coil and the outer heating coil are in use, the higher the density of the magnetic force lines between the magnetic poles, the stronger the magnetic field intensity, and the greater the induced current generated in the corresponding coil, and the higher the temperature. Therefore, at the same output power, the heating rate of the inner heating coil is higher than that of the outer heating coil.

[0030] According to the above technical solution, the connections of the outer heating coil and the inner heating coil to the power transmitter are both pluggable. When the inner heating coil and the outer heating coil are in use, the user can conveniently disassemble them by plugging and unplugging.

[0031] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: During the use of the present invention, the upper die, the lower die and the heating coil can be conveniently replaced when processing different to-be-formed blanks. Specifically, the user can fix the lower die through the limiting groove, and can complete the preliminary fixation of the upper die through the flexible bladder and the transfer pump inside the upper die. At the same time, after the flexible bladder expands due to heat, the upper die can be evenly fixed, firmly fixed to the upper die, and the coaxiality of the upper die can be ensured, thereby improving the subsequent forming quality. The outer heating coil and the inner heating coil can be disassembled by simple plugging and unplugging. First, heat the upper die through the outer heating coil to increase its temperature. At the same time, when installing the upper die, first heat the upper die through the outer heating coil to increase its temperature, so that the flexible bladder expands preliminarily to fix the upper die, and then heat the upper die through the inner heating coil, which can quickly reach the required temperature and reduce the damage to the upper die. Description of the Drawings

[0032] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0033] Figure 1 is the overall structural schematic diagram of the present invention;

[0034] Figure 2 is the specific installation structural schematic diagram of the power transmitter of the present invention;

[0035] Figure 3It is a schematic diagram of the internal structure of the upper mold of the present invention;

[0036] Figure 4 It is a schematic diagram of the module connection structure of the present invention;

[0037] In the figure: 1. Driving cylinder; 2. Driving connecting rod; 3. Fixed connecting rod; 4. Upper mold; 5. Limiting groove; 6. Lower mold; 7. Fixed groove; 8. Flexible bladder; 9. Air inlet; 10. Transfer pump; 11. Fixed column; 12. Sliding groove; 13. Electric control slider; 14. Output cylinder; 15. Output connecting rod; 16. Electric transmitter; 17. Outer heating coil; 18. Inner heating coil; 19. Support connecting rod. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Please refer to Figures 1-4 , the present invention provides a technical solution: an intermediate frequency high-temperature hot mold machine, including a mold pressing mechanism, a heating mechanism, and a data module. The mold pressing mechanism is used to press and form the blank. The heating mechanism is located outside the mold pressing mechanism and is used to heat the mold pressing mechanism. The data module is electrically connected to the mold pressing mechanism and the heating mechanism respectively. The data module is used to detect the real-time states of the mold pressing mechanism and the heating mechanism, judge the detected data information, and control the mold pressing mechanism and the heating mechanism according to the judgment result to drive the mold pressing mechanism and the heating mechanism to form the blank;

[0040] The die pressing mechanism includes a driving cylinder 1. The top of the driving cylinder 1 is connected to a driving connecting rod 2 in a transmission manner. One side of the driving connecting rod 2 is fixedly installed with a supporting connecting rod 19. The end of the supporting connecting rod 19 is installed with a fixed connecting rod 3. The bottom of the fixed connecting rod 3 is provided with an upper die 4. A temperature sensor is arranged inside the upper die 4. The bottom of the upper die 4 is provided with a limiting groove 5. A lower die 6 is arranged inside the limiting groove 5. A fixing groove 7 is formed inside the upper die 4. The inner wall of the fixing groove 7 is provided with a flexible bag 8. An air outlet 9 is formed at the bottom of the fixing groove 7. The outside of the upper die 4 is provided with a transfer pump 10. The output end of the transfer pump 10 is connected to the end of the air outlet 9 through a pipeline. When this hot die machine is in use, the limiting groove 5 is used to limit the lower die 6, and the fixing groove 7 is used to fix the upper die 4 through the flexible bag 8. Specifically, the friction generated by the flexible bag 8 in the normal temperature state will initially fix the outer surface of the fixed connecting rod 3, and the flexible bag 8 will firmly fix the fixed connecting rod 3 after being heated and expanded. At the same time, the coaxiality of the fixed connecting rod 3 can be ensured, preventing the upper die 4 from tilting during the subsequent forming process. The transfer pump 10 is used to convey the gas at the bottom of the fixing groove 7 through the air outlet 9. Specifically, when it is necessary to fix the upper die 4, the fixed connecting rod 3 needs to be installed inside the fixing groove 7. At this time, the transfer pump 10 pumps out the gas at the bottom of the fixing groove 7 through the air outlet 9. The negative pressure generated at this time will suck the fixed connecting rod 3 to the bottom of the fixing groove 7 and fix the fixed connecting rod 3. When it is necessary to replace the upper die 4, the fixed connecting rod 3 needs to be removed from the inside of the fixing groove 7. After the upper die 4 cools down, the gas inside the flexible bag 8 will cool down and reset at this time. The transfer pump 10 inputs external gas into the bottom of the fixing groove 7 through the air outlet 9 and pushes the fixed connecting rod 3 outwards through the acting force generated by gas compression to disassemble the fixed connecting rod 3;

[0041] The heating mechanism includes a fixed column 11. A sliding groove 12 is formed inside the fixed column 11. An electric control slider 13 is slidably connected inside the sliding groove 12. The top of the electric control slider 13 is provided with an output cylinder 14. The output end of the output cylinder 14 is connected to an output connecting rod 15 in a transmission manner. The end of the output connecting rod 15 is provided with an electrical connector 16. The bottom of the electrical connector 16 is electrically connected to an outer layer heating coil 17. The top of the electrical connector 16 is electrically connected to an inner layer heating coil 18. The outer layer heating coil 17 is installed outside the inner layer heating coil 18. When this hot die machine is in use, the electrical connector 16 is used to energize the outer layer heating coil 17 and the inner layer heating coil 18, increase the temperature of the outer layer heating coil 17 and the inner layer heating coil 18, and heat the upper die 4 through the temperature of the outer layer heating coil 17 and the inner layer heating coil 18;

[0042] The data module includes a detection unit, which is electrically connected to a judgment unit. The judgment unit is electrically connected to a control unit. The detection unit is located inside the temperature sensor. The detection unit is used to detect the temperature of the upper die 4 through the temperature sensor and transmit the detected data information to the judgment unit. The judgment unit is used to judge the received data information and transmit the judgment result to the control unit. The control unit is electrically connected to the driving cylinder 2, the transfer pump 10, the electric control slider 13, the output cylinder 14, and the electric transmitter 16. The control unit is used to control the driving cylinder 2, the transfer pump 10, the electric control slider 13, the output cylinder 14, and the electric transmitter 16 through the received data information to heat the upper die 4.

[0043] The working steps of the hot die machine are as follows:

[0044] Step A: Push the lower die 6 required for blank forming inward through the limit groove 5 until it is fixed by the limit groove 5, and heat the processing groove of the lower die 6.

[0045] Step B: Place the blank to be processed inside the lower die 6. At this time, the heated lower die 6 will heat the blank.

[0046] Step C: Install the upper die 4 required for blank forming at the bottom of the fixed connecting rod 3.

[0047] Step D: Install the inner heating coil 18 and the outer heating coil 17 required for the upper die 4 at the output end of the electric transmitter 16.

[0048] Step E: The control unit drives the electric control slider 13 to slide inside the sliding groove 12, drives the output cylinder 14 to move, and drives the electric transmitter 16 to move through the output connecting rod, and moves the inner heating coil 18 to the outside of the bottom of the upper die 6.

[0049] Step F: The control unit drives the electric transmitter 16 to work, raises the temperature of the inner heating coil 18 and the outer heating coil 17 to heat the upper die. During this process, the detection unit and the judgment module detect and judge the temperature of the inner heating coil 18 and the outer heating coil 17, and adjust the output temperature of the electric transmitter 16.

[0050] Step G: After the temperature of the upper die 6 reaches the expected value, the control unit turns off the electric transmitter 16 and drives the inner heating coil 18 to move away from the upper die 6.

[0051] Step H: The control unit drives the driving cylinder 1 to work, drives the support connecting rod 19 to move through the driving connecting rod 2, further drives the fixed connecting rod 3 to move, and pushes the upper die 4 to move in the vertical direction through the fixed connecting rod 3 to form the blank to be processed inside the lower die 6.

[0052] Step I: After the blank is formed, the control unit drives the driving cylinder 1 to work, moves the upper die 4 to the top, disassembles the upper die 4 after the temperature drops, and at the same time slides the lower die 6 outwards along the limiting groove 5 to collect the blank formed inside the lower die 6;

[0053] Through this step, the upper die, the lower die and the heating coil can be conveniently replaced when processing different blanks to be formed. Specifically, the user can fix the lower die through the limiting groove, and can complete the preliminary fixation of the upper die through the flexible bladder and the transfer pump inside the upper die. At the same time, after the flexible bladder expands due to heat, it can complete the uniform fixation of the upper die, firmly fix the upper die, and ensure the coaxiality of the upper die, thereby improving the subsequent forming quality. The outer heating coil and the inner heating coil can be disassembled by simple plugging and unplugging;

[0054] In step F, the specific heating steps are as follows:

[0055] Step F1: The control unit drives the electrical transmitter 16 to work at the rated power, energizes the outer heating coil 17, raises its temperature, and heats the upper die 6 through the outer heating coil 17;

[0056] Step F2: During the heating process of the outer heating coil 17, the detection unit detects the temperature of the upper die 6, records the real-time temperature of the upper die 6 as Q 实 , records the temperature to which the upper die 6 needs to be heated as Q 标 , and transmits this data information to the judgment unit;

[0057] Step F3: The judgment unit judges the received data information and transmits the judgment result to the control unit;

[0058] Step F4: The control unit controls the electrical transmitter 16 according to the received data information, adjusts the output temperature of the inner heating coil 18 and the outer heating coil 17. Through this step, the temperatures of the outer heating coil and the inner heating coil can be adjusted. Among them, the heating rate of the inner heating coil is relatively fast. Directly heating the upper die through the inner heating coil will cause too large a temperature change of the upper die, thereby causing certain damage to the upper die, shortening the service life of the upper die, and the too large temperature change of the upper die will cause too large a temperature change of the flexible bladder inside it, there is a certain explosion hazard. At this time, first heat the upper die through the outer heating coil to raise its temperature, make the flexible bladder expand preliminarily, fix the upper die, and then heat the upper die through the inner heating coil, so that it can quickly reach the required temperature and reduce the damage to the upper die;

[0059] In step F3, the specific judgment process is as follows:

[0060] When Q 实 <0.5Q 标 At this time, the temperature of the upper mold 6 is low and it is not fully fixed. At the same time, the temperature of the upper mold 6 cannot be used to form the blank. It is judged that the upper mold 6 needs to be continuously heated by the outer heating coil 17;

[0061] When Q 实 ≥0.5Q 标 At this time, the temperature of the upper mold is high and it has been initially fixed. At the same time, the change in the temperature of the upper mold rising to the required temperature is small. It is judged that the inner heating coil 18 needs to be energized by the electrical transmitter 16 at the rated output power to increase the temperature of the inner heating coil 18, and the upper mold 6 is heated by the inner heating coil 18;

[0062] By detecting the temperature of the upper mold and adjusting the current output of the electrical transmitter to the outer heating coil and the inner heating coil according to the detection result, the temperature change of the upper mold during heating can be reduced, thereby reducing the damage caused by high temperature to the upper mold and prolonging the service life of the upper mold;

[0063] The coil density of the inner heating coil 18 is higher than that of the outer heating coil 17. When the inner heating coil 18 and the outer heating coil 17 are in use, the higher the density of the magnetic field lines between the magnetic poles, the stronger the magnetic field intensity, and the greater the induced current generated in the corresponding coil, and the higher the temperature. Therefore, at the same output power, the heating rate of the inner heating coil 18 is higher than that of the outer heating coil 17;

[0064] The connections of the outer heating coil 17 and the inner heating coil 18 to the electrical transmitter 16 are both pluggable. When the inner heating coil 18 and the outer heating coil 17 are in use, the user can conveniently disassemble them by plugging and unplugging.

[0065] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0066] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A medium-frequency high-temperature hot die machine, comprising a die pressing mechanism, a heating mechanism and a data module, characterized in that: The die pressing mechanism is used to press and form the blank. The heating mechanism is located outside the die pressing mechanism and is used to heat the die pressing mechanism. The data module is electrically connected to the die pressing mechanism and the heating mechanism respectively. The data module is used to detect the real-time states of the die pressing mechanism and the heating mechanism, judge the detected data information, and control the die pressing mechanism and the heating mechanism according to the judgment results to drive the die pressing mechanism and the heating mechanism to form the blank. The die pressing mechanism includes a driving cylinder (1). The top of the driving cylinder (1) is connected to a driving connecting rod (2) in a transmission manner. A supporting connecting rod (19) is fixedly installed on one side of the driving connecting rod (2). A fixed connecting rod (3) is installed at the end of the supporting connecting rod (19). A top die (4) is arranged at the bottom of the fixed connecting rod (3). A temperature sensor is arranged inside the top die (4). A bottom die (6) is arranged below the top die (4). The heating mechanism includes a fixed column (11). A sliding groove (12) is formed inside the fixed column (11). An electric control slider (13) is slidably connected inside the sliding groove (12). An output cylinder (14) is arranged at the top of the electric control slider (13). The output end of the output cylinder (14) is connected to an output connecting rod (15) in a transmission manner. An electric transmitter (16) is arranged at the end of the output connecting rod (15). An outer heating coil (17) is electrically connected to the bottom of the electric transmitter (16). An inner heating coil (18) is electrically connected to the top of the electric transmitter (16). The outer heating coil (17) is installed outside the inner heating coil (18). The coil density of the inner heating coil (18) is higher than that of the outer heating coil (17). The heating includes the following steps: Step F1: The control unit drives the electric transmitter (16) to work at the rated power, energizes the outer heating coil (17), increases its temperature, and heats the top die (4) through the outer heating coil (17). Step F2: During the heating process of the outer heating coil (17), the detection unit detects the temperature of the upper mold (4), records the real-time temperature of the upper mold (4) as , records the temperature to which the upper mold (4) needs to be heated as , and transmits this data information to the judgment unit; Step F3: The judgment unit judges the received data information and transmits the judgment result to the control unit. The specific judgment process is as follows: When At this time, the temperature of the upper die (4) is low and it is not fully fixed. At the same time, the temperature of the upper die (4) cannot be used to form the blank. It is judged that the upper die (4) needs to be continuously heated by the outer heating coil (17); When At this time, the temperature of the upper mold is high and it has been preliminarily fixed. At the same time, the change in the temperature of the upper mold rising to the required temperature is small. It is judged that it is necessary to energize the inner heating coil (18) with the rated output power through the power transmission device (16) to increase the temperature of the inner heating coil (18), and heat the upper mold (4) through the inner heating coil (18); Step F4: The control unit controls the electric transmitter (16) according to the received data information and adjusts the output temperatures of the inner heating coil (18) and the outer heating coil (17).

2. The medium-frequency high-temperature hot die machine according to claim 1, wherein: A fixed groove (7) is formed inside the top die (4). A flexible bladder (8) is arranged on the inner wall of the fixed groove (7). An air outlet (9) is formed at the bottom of the fixed groove (7). A transfer pump (10) is arranged outside the top die (4). The output end of the transfer pump (10) is connected to the end of the air outlet (9) through a pipeline.

3. The medium-frequency high-temperature hot die machine according to claim 2, wherein: The data module includes a detection unit, which is electrically connected to a judgment unit. The judgment unit is electrically connected to a control unit. The detection unit is located inside the temperature sensor. The detection unit is used to detect the temperature of the upper die (4) through the temperature sensor and transmit the detected data information to the judgment unit. The judgment unit is used to judge the received data information and transmit the judgment result to the control unit. The control unit is electrically connected to the driving cylinder (1), the transfer pump (10), the electric control slider (13), the output cylinder (14) and the electrical connector (16). The control unit is used to control the driving cylinder (1), the transfer pump (10), the electric control slider (13), the output cylinder (14) and the electrical connector (16) through the received data information to heat the upper die (4).

4. The medium-frequency high-temperature hot die machine according to claim 3, wherein: The working steps of the hot die machine are as follows: Step A: Push the lower die (6) required for blank forming inward through the limit groove (5) until it is fixed by the limit groove (5), and heat the processing groove of the lower die (6). Step B: Place the blank to be processed inside the lower die (6). Step C: Install the upper die (4) required for blank forming at the bottom of the fixed connecting rod (3). Step D: Install the inner heating coil (18) and the outer heating coil (17) required for the upper die (4) at the output end of the electrical connector (16). Step E: The control unit drives the electric control slider (13) to slide inside the sliding groove (12), drives the output cylinder (14) to move, and drives the electrical connector (16) to move through the output connecting rod, and moves the inner heating coil (18) to the outside of the bottom of the upper die (4). Step F: The control unit drives the electrical connector (16) to work, raises the temperatures of the inner heating coil (18) and the outer heating coil (17), and heats the upper die. During this process, the detection unit and the judgment module detect and judge the temperatures of the inner heating coil (18) and the outer heating coil (17), and adjust the output temperature of the electrical connector (16). Step G: After the temperature of the upper die (4) reaches the expectation, the control unit turns off the electrical connector (16) and drives the inner heating coil (18) to move away from the upper die (4). Step H: The control unit drives the driving cylinder (1) to work, drives the support connecting rod (19) to move through the driving connecting rod (2), further drives the fixed connecting rod (3) to move, and pushes the upper die (4) to move in the vertical direction through the fixed connecting rod (3) to form the blank to be processed inside the lower die (6). Step I: After the blank forming is completed, the control unit drives the driving cylinder (1) to work, moves the upper die (4) to the top, disassembles the upper die (4) after the temperature drops, and at the same time slides the lower die (6) outward along the limit groove (5) to collect the blank formed inside the lower die (6).

5. The medium-frequency high-temperature hot die machine according to claim 4, characterized in that: The connections between the outer heating coil (17), the inner heating coil (18) and the electrical connector (16) are all pluggable.

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