Preheating pretreatment system for titanium alloy coiled sheet process

Abstract

The application discloses a preheating pretreatment system for a titanium alloy coiled plate process, which comprises a preheating constant-temperature oven, wherein a preheating cavity is arranged in the preheating constant-temperature oven, and a constant-temperature heating device is arranged in the preheating cavity; a titanium alloy plate display rack is arranged in the preheating cavity, and a plurality of layers of horizontally placed titanium alloy coiled plate to be wound are uniformly displayed on the titanium alloy plate display rack from bottom to top, and each layer comprises at least three titanium alloy coiled plates to be wound which are arranged in parallel; a selective supplementary heating system is arranged on the titanium alloy plate display rack, and the selective supplementary heating system can selectively perform individual supplementary heating on any titanium alloy coiled plate to be wound displayed; the temperature in the preheating cavity of the application only needs to be raised to temperature a, and the temperature a can be allowed to fluctuate up and down, so that the requirement of the temperature control system in the preheating cavity is reduced, and the cost is reduced, and at the same time, the temperature a is significantly lower than temperature b, so that the purpose of continuous energy saving is achieved.

Description

Technical Field

[0001] This invention belongs to the field of preheating treatment for titanium alloy processing. Background Technology

[0002] In actual processing, to prevent springback when rolling TC4 titanium alloy into a tubular structure, it needs to be heated to around 280°C before rolling. The previous heating method was to heat it with a flame while simultaneously rolling it into a tubular shape. This heating method caused uneven heating and thermal deformation of the plate.

[0003] Later, in order to solve the problem of uniform heat distribution during flame firing, a constant temperature oven structure was adopted. All the titanium alloy plates waiting to be rolled were placed in a constant temperature oven at 280°C. When a titanium alloy sheet needed to be processed, it could be taken out directly from the constant temperature oven.

[0004] However, maintaining a constant temperature of 280°C throughout the oven results in significant energy waste. In reality, only one titanium alloy sheet needs to be removed from the oven and brought to 280°C during each processing run. The remaining sheets that are not removed do not need to be heated to 280°C. Therefore, this oven-type heat pretreatment process has considerable potential for energy saving. Summary of the Invention

[0005] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a preheating pretreatment system for titanium alloy coil processing, which can achieve the purpose of individually heating the titanium alloy coil to be removed to temperature b.

[0006] Technical Solution: To achieve the above objectives, the preheating pretreatment system for the titanium alloy coil process of the present invention includes a preheating constant temperature oven, the preheating constant temperature oven having a preheating cavity, and a constant temperature heating device installed in the preheating cavity; a titanium alloy plate display rack is installed in the preheating cavity, on which several layers of horizontally placed titanium alloy plates to be coiled are evenly arranged from bottom to top, each layer including at least three titanium alloy plates to be coiled side by side; the titanium alloy plate display rack has a selective supplementary heating system, which can selectively perform individual supplementary heating on any of the displayed titanium alloy plates to be coiled.

[0007] Furthermore, the titanium alloy plate display rack includes first support horizontal tubes arranged in an equidistant array from top to bottom, and second support horizontal tubes arranged in an equidistant array from top to bottom; each first support horizontal tube corresponds to a second support horizontal tube of equal height, and the first support horizontal tube and the second support horizontal tube of equal height together support three titanium alloy plates to be rolled in parallel, with the two ends of each titanium alloy plate to be rolled resting on the lower first support horizontal tube and the second support horizontal tube respectively along the length direction.

[0008] Furthermore, the two ends of each first supporting horizontal tube are respectively fixedly connected to the first support column and the fourth support column; the two ends of each second supporting horizontal tube are respectively fixedly connected to the second support column and the third support column.

[0009] Both the first and second support columns have hollow structures for air conduction.

[0010] The selective supplemental heating system includes an air heater installed between the first and second support columns. The air heater's inlet end is connected to the internal hollow structure of the first support column via an exhaust pipe. The air heater's hot air outlet end is connected to the internal hollow structure of the second support column via a hot air outlet pipe. A circulating air pump is installed on the air outlet pipe or exhaust pipe. Both the first and second support horizontal pipes contain air guide channels along their length. One end of the air guide channel in each of the first support horizontal pipes is connected to the internal hollow structure of the first support column. One end of the air guide channel in each of the second support horizontal pipes is connected to the internal hollow structure of the second support column.

[0011] Furthermore, the first and second supporting horizontal pipes each have a first strip-shaped air vent, a second strip-shaped air vent, and a third strip-shaped air vent cut out along their length on their adjacent sides. A rotating shaft is coaxially arranged in the air guiding channel within each of the first and second supporting horizontal pipes. A first notched column, a second notched column, and a third notched column are integrally formed along the length of the rotating shaft. The outer walls of the first, second, and third notched columns slide or have a clearance fit with the inner wall of the air guiding channel. The first, second, and third notched columns correspond to the first, second, and third strip-shaped air vents, respectively. The outer walls of the first, second, and third notched columns each have a first air guiding slot, a second air guiding slot, and a third air guiding slot extending along their length.

[0012] Furthermore, from an axial perspective along the axis of rotation, the first, second, and third air guide slots are staggered in orientation and arranged in a circular array.

[0013] Furthermore, when the shaft rotates along the axis to a certain state, the shaft exists in the following four states:

[0014] State A: When the first air guide slot, the second air guide slot, and the third air guide slot are not connected to the first strip air outlet, the second strip air outlet, and the third strip air outlet, respectively, the outer walls of the first notch column, the second notch column, and the third notch column respectively block the first strip air outlet, the second strip air outlet, and the third strip air outlet.

[0015] State B: When the first air guide slot of the first notch column is connected to the first strip air outlet, the outer cylindrical surfaces of the second notch column and the third notch column respectively block the corresponding second strip air outlet and third strip air outlet;

[0016] State C: When the second air guide slot of the second notch column is connected to the second strip air outlet, the outer cylindrical surfaces of the first notch column and the third notch column respectively block the corresponding first strip air outlet and third strip air outlet;

[0017] State D: When the third air guide slot of the third notch column c is connected to the third strip air outlet, the outer cylindrical surfaces of the first notch column and the second notch column respectively block the corresponding second strip air outlet and third strip air outlet.

[0018] Furthermore, each shaft is driven by an independent motor; a plug is coaxially arranged on the outer side of the end of each shaft near the motor, the plug is placed on the end of the air guide channel near the motor, and the inner wall of the air guide channel of the plug slides or has a clearance fit.

[0019] Furthermore, the working method of the preheating pretreatment system for titanium alloy coil process is as follows: two temperatures are preset: temperature a and temperature b; temperature a is greater than temperature b; the temperature in the preheating chamber is first raised to temperature; the first titanium alloy coil to be taken out is marked as the titanium alloy coil to be taken out.

[0020] Then, all the rotating shafts inside the first and second support tubes on the upper side of the titanium alloy plate to be removed, as well as the first and second support tubes on the lower side of the titanium alloy plate to be removed, are put into "state"; all the remaining rotating shafts are put into "state A"; and the circulating air pump and air heater are turned on; until the titanium alloy plate to be removed is heated to the temperature individually.

[0021] Beneficial effects: The temperature in the preheating chamber of the present invention only needs to be raised to temperature a, and temperature a can be allowed to fluctuate, thereby reducing the requirements of the temperature control system in the preheating chamber and thus achieving the purpose of reducing costs. At the same time, temperature a is significantly lower than temperature b, thereby achieving the purpose of continuous energy saving.

[0022] Meanwhile, the titanium alloy coil to be removed, based on its own temperature a, is continuously heated by the sandwich heating of the upper and lower heat streams, thus further raising the temperature of the titanium alloy coil to be removed to temperature b. When the titanium alloy coil to be removed reaches temperature b, the other titanium alloy coils in the preheating constant temperature oven will not rise significantly, thus achieving the purpose of heating the titanium alloy coil to be removed to temperature b individually, avoiding the energy waste caused by the traditional simultaneous heating to temperature b. Attached Figure Description

[0023] Appendix Figure 1 This is a schematic diagram of the overall structure of this solution;

[0024] Appendix Figure 2 For the appendix Figure 1 Sectional view along direction A;

[0025] Appendix Figure 3 This is a schematic diagram of a partial circulation during the operation of an air heater;

[0026] Appendix Figure 4 For the appendix Figure 3 A magnified view of a portion of the image;

[0027] Appendix Figure 5 I attach Figure 2 An enlarged view of mark 7;

[0028] Appendix Figure 6 These are schematic diagrams from three different perspectives of the same rotating axis;

[0029] Appendix Figure 7 This is an internal sectional view of the first and second supporting horizontal tubes. Detailed Implementation

[0030] The invention will now be further described with reference to the accompanying drawings.

[0031] As attached Figures 1 to 7 The preheating pretreatment system for the titanium alloy coil process shown is as follows: Figure 1 As shown, the system includes a preheating oven 1, which contains a preheating cavity 6. The preheating cavity 6 is equipped with a constant-temperature heating device, such as a heating wire, for heating the entire contents of the preheating cavity 6. Figures 2 to 4 As shown, a titanium alloy plate display rack 27 is provided in the preheating chamber 6. Several layers of horizontally placed titanium alloy plates 2 are evenly arranged on the titanium alloy plate display rack 27 from bottom to top. The titanium alloy plate display rack 27 of this scheme has a selective supplementary heating system, which can selectively perform individual supplementary heating on any of the displayed titanium alloy plates 2.

[0032] Each layer includes at least three titanium alloy plates 2 arranged side by side; the titanium alloy plate display rack 27 includes first support horizontal tubes 3a arranged in an equidistant array from top to bottom, and second support horizontal tubes 3b arranged in an equidistant array from top to bottom; each first support horizontal tube 3a corresponds to a second support horizontal tube 3b of equal height, and the first support horizontal tube 3a and the second support horizontal tube 3b of equal height together support the three titanium alloy plates 2 arranged side by side, and the two ends of each titanium alloy plate 2 along the length direction are respectively placed on the first support horizontal tube 3a and the second support horizontal tube 3b on the lower side.

[0033] On the titanium alloy plate display rack 27, three titanium alloy plates 2 arranged side by side on the top layer are respectively equipped with three sets of downward scanning infrared temperature sensors 4 directly above them. Figure 1 As shown.

[0034] like Figure 3It also includes a vertical first support column 18a, a second support column 18b, a third support column 18c, and a fourth support column 18d; the two ends of each first supporting horizontal tube 3a are respectively fixedly connected to the first support column 18a and the fourth support column 18d; the two ends of each second supporting horizontal tube 3b are respectively fixedly connected to the second support column 18b and the third support column 18c; the interior of the first support column 18a and the second support column 18b is a hollow structure for air conduction.

[0035] The selective supplemental heating system includes an air heater 15 installed between the first support column 18a and the second support column 18b. The air inlet of the air heater 15 is connected to the internal hollow structure of the first support column 18a through an exhaust pipe 16. The hot air outlet of the air heater 15 is connected to the internal hollow structure of the second support column 18b through a hot air outlet pipe 17. A circulating air pump is installed on the air outlet pipe 17 or the exhaust pipe 16. Both the first supporting horizontal pipe 3a and the second supporting horizontal pipe 3b contain air guide channels 14 along their length. One end of the air guide channel 14 in each of the first supporting horizontal pipes 3a is connected to the internal hollow structure of the first support column 18a. One end of the air guide channel 14 in each of the second supporting horizontal pipes 3b is connected to the internal hollow structure of the second support column 18b.

[0036] like Figure 3 and 4 The first supporting horizontal tube 3a and the second supporting horizontal tube 3b each have a first strip-shaped air vent 12a, a second strip-shaped air vent 12b and a third strip-shaped air vent 12c cut out along their length on the side that is close to each other.

[0037] like Figure 3 and Figure 5 The gas jets ejected from the first strip air outlet 12a, the second strip air outlet 12b and the third strip air outlet 12c on the second supporting horizontal pipe 3b extend parallel to the length direction of the three parallel titanium alloy plates to be rolled 2.

[0038] like Figure 6 and 7 As shown, each of the first supporting horizontal tubes 3a and the second supporting horizontal tubes 3b has a rotating shaft 8 coaxially arranged in the air guiding channel 14. A first notched post 10a, a second notched post 10b, and a third notched post 10c are integrally formed along the length of the rotating shaft 8. The outer walls of the first notched post 10a, the second notched post 10b, and the third notched post 10c slide or have a clearance fit with the inner wall of the air guiding channel 14. Figure 6As shown, the first notched column 10a, the second notched column 10b, and the third notched column 10c correspond to the first strip air outlet 12a, the second strip air outlet 12b, and the third strip air outlet 12c, respectively; the outer walls of the first notched column 10a, the second notched column 10b, and the third notched column 10c are respectively provided with a first air guide slot 11a, a second air guide slot 11b, and a third air guide slot 11c through the length direction; from the axial perspective along the rotation axis 8, the orientations of the first air guide slot 11a, the second air guide slot 11b, and the third air guide slot 11c are staggered and arranged in a circular array.

[0039] When the rotating shaft 8 rotates along the axis to a certain state, the rotating shaft 8 exists in the following four states:

[0040] State A: When the first air guide slot 11a, the second air guide slot 11b, and the third air guide slot 11c are not connected to the first strip air outlet 12a, the second strip air outlet 12b, and the third strip air outlet 12c respectively, the outer walls of the first notch column 10a, the second notch column 10b, and the third notch column 10c respectively block the first strip air outlet 12a, the second strip air outlet 12b, and the third strip air outlet 12c.

[0041] State B: When the first air guide slot 11a of the first notch column 10a is connected to the first strip air outlet 12a, the outer cylindrical surfaces of the second notch column 10b and the third notch column 10c respectively block the corresponding second strip air outlet 12b and third strip air outlet 12c.

[0042] State C: When the second air guide slot 11b of the second notch column 10b is connected to the second strip air outlet 12b, the outer cylindrical surfaces of the first notch column 10a and the third notch column 10c respectively block the corresponding first strip air outlet 12a and third strip air outlet 12c.

[0043] State D: When the third air guide slot 11c of the third notch column 10c is connected to the third strip air outlet 12c, the outer cylindrical surfaces of the first notch column 10a and the second notch column 10b respectively block the corresponding second strip air outlet 12b and third strip air outlet 12c.

[0044] like Figure 7 Each rotating shaft 8 is driven by an independent motor 5; a plugging post 9 is coaxially arranged on the outer side of the end of each rotating shaft 8 near the motor 5, the plugging post 9 is plugged on the end of the air guide channel 14 near the motor 5, and the inner wall surface of the air guide channel 14 of the plugging post 9 slides or has clearance fit.

[0045] Working principle: Two preset temperatures: temperature a and temperature b; temperature b is the target temperature when a titanium alloy plate to be rolled 2 is taken out of the preheating constant temperature oven 1; temperature a is the preset constant temperature in the preheating cavity 6; temperature a is greater than temperature b; in this scheme, temperature a is 200°C and temperature b is 280°C.

[0046] The rules for taking out titanium alloy plates 2 to be rolled: The order of taking out titanium alloy plates 2 to be rolled from the preheated constant temperature oven 1 is to take them out one by one from the top layer to the bottom layer. After taking out one titanium alloy plate 2 to be rolled from the preheated constant temperature oven 1 each time, after a certain processing time, take out the second titanium alloy plate 2 to be rolled from the preheated constant temperature oven 1.

[0047] The specific working method of this device is as follows:

[0048] First, the constant temperature heating device in the preheating chamber 6 is activated, raising the temperature in the preheating chamber 6 to temperature a and maintaining the temperature in the preheating chamber 6 at temperature a. The temperature in the preheating chamber 6 is allowed to fluctuate within ±5℃ from temperature a, thereby reducing the requirements of the temperature control system in the preheating chamber 6 and thus achieving the goal of reducing costs. At the same time, temperature a is significantly lower than temperature b, thereby achieving the goal of continuous energy saving. Then, all the titanium alloy plates 2 to be rolled on the titanium alloy plate display rack 27 are gradually heated to near temperature a.

[0049] The first piece of titanium alloy coil 2 that is about to be taken out is located on the top layer of several horizontally placed titanium alloy coil 2, and corresponds to the third strip-shaped air outlet 12c. This piece of titanium alloy coil 2 that is about to be taken out is denoted as titanium alloy coil 2a to be taken out.

[0050] The control system uses each motor 5 to control each rotating shaft 8 to rotate to a predetermined state, so that each rotating shaft 8 in the first set of supporting horizontal tubes 3a and 3b on the upper side of the titanium alloy coil plate 2a to be removed, and in the first set of supporting horizontal tubes 3a and 3b on the lower side of the titanium alloy coil plate 2a to be removed, enters the "D state"; at the same time, all other rotating shafts 8 enter the "A state".

[0051] Turn on the circulating air pump and air heater 15 on the air exhaust pipe 17 or the air extraction pipe 16; driven by the circulating air pump, a "like" shape is formed. Figure 3 The arrow indicates the internal airflow circulation;

[0052] A jet of high-temperature gas heated by the air heater 15, ejected from the third strip-shaped air outlet 12c on the second supporting horizontal pipe 3b on the upper side of the titanium alloy coil plate 2a to be removed, flows parallel to the upper surface of the titanium alloy coil plate 2a to be removed. This jet of high-temperature gas flowing parallel to the upper surface of the titanium alloy coil plate 2a to be removed is referred to as the upper heat flow 21. Under the action of the circulating pump, the third strip-shaped air outlet 12c on the first supporting horizontal pipe 3a on the upper side of the titanium alloy coil plate 2a to be removed continuously draws in the end gas of the upper heat flow 21. By controlling the operating power of the air heater 15, the temperature of the upper heat flow 21 is kept higher than the temperature b.

[0053] Meanwhile, a jet of high-temperature gas heated by the air heater 15, ejected from the third strip-shaped air outlet 12c on the second supporting horizontal pipe 3b on the lower side of the titanium alloy coil plate 2a to be removed, flows parallel to the lower surface of the titanium alloy coil plate 2a to be removed. The high-temperature gas jet flowing parallel to the lower surface of the titanium alloy coil plate 2a to be removed is referred to as the lower heat flow 22. Under the action of the circulation pump, the third strip-shaped air outlet 12c on the first supporting horizontal pipe 3a on the lower side of the titanium alloy coil plate 2a to be removed continuously draws away the end gas of the lower heat flow 22. By controlling the power of the air heater 15, the temperature of the lower heat flow 22 is kept higher than the temperature b.

[0054] At this time, the titanium alloy plate 2a to be taken out is continuously heated by the upper heat flow 21 and the lower heat flow 22 on the basis of its own temperature a, so that the titanium alloy plate 2a to be taken out is further heated to temperature b on the basis of its own temperature a. When the titanium alloy plate 2a to be taken out is heated to temperature b, it is identified by the infrared temperature sensor 4 above and the air heater 15 is stopped. At the same time, apart from the titanium alloy plate 2a to be taken out, the other titanium alloy plates 2 in the preheating constant temperature oven 1 will not be significantly heated, thus achieving the purpose of heating the titanium alloy plate 2a to be taken out to temperature b separately, avoiding the energy waste caused by the traditional simultaneous heating to temperature b. Finally, the door of the preheating constant temperature oven 1 is opened and the titanium alloy plate 2a to be taken out, which has been individually heated to temperature b, is taken out.

[0055] If other titanium alloy coils need to be heated to temperature b separately later, the above principle can be followed.

[0056] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A preheating pretreatment system for titanium alloy coil processing, characterized in that: The system includes a preheating constant temperature oven (1), which has a preheating cavity (6) and a constant temperature heating device. The preheating cavity (6) is equipped with a titanium alloy plate display rack (27), on which several layers of horizontally placed titanium alloy plates (2) are evenly arranged from bottom to top. Each layer includes at least three titanium alloy plates (2) arranged in parallel. The titanium alloy plate display rack (27) has a selective supplementary heating system, which can selectively perform individual supplementary heating on any of the displayed titanium alloy plates (2). The titanium alloy plate display rack (27) includes a first support horizontal tube (3a) arranged in an equidistant array from top to bottom, and a second support horizontal tube (3b) arranged in an equidistant array from top to bottom; each first support horizontal tube (3a) corresponds to a second support horizontal tube (3b) of the same height, and the first support horizontal tube (3a) and the second support horizontal tube (3b) of the same height together support three titanium alloy plates (2) arranged in parallel, and the two ends of each titanium alloy plate (2) along the length direction are respectively placed on the first support horizontal tube (3a) and the second support horizontal tube (3b) on the lower side. Each of the first supporting horizontal tubes (3a) is fixedly connected to a first support column (18a) and a fourth support column (18d) at both ends; each of the second supporting horizontal tubes (3b) is fixedly connected to a second support column (18b) and a third support column (18c) at both ends. The first support column (18a) and the second support column (18b) are both hollow structures for air conduction. The selective supplementary heating system includes an air heater (15) installed between the first support column (18a) and the second support column (18b). The air inlet of the air heater (15) is connected to the internal hollow structure of the first support column (18a) through an air extraction pipe (16). The hot air outlet of the air heater (15) is connected to the internal hollow structure of the second support column (18b) through a hot air outlet pipe (17). A circulating air pump is provided on the air outlet pipe (17) or the air extraction pipe (16). Both the first support horizontal pipe (3a) and the second support horizontal pipe (3b) have air guide channels (14) along the length direction. One end of the air guide channel (14) in each of the first support horizontal pipes (3a) is connected to the internal hollow structure of the first support column (18a). One end of the air guide channel (14) in each of the second support horizontal pipes (3b) is connected to the internal hollow structure of the second support column (18b). The first supporting horizontal tube (3a) and the second supporting horizontal tube (3b) each have a first strip-shaped air vent (12a), a second strip-shaped air vent (12b), and a third strip-shaped air vent (12c) cut out along their length on their adjacent sides; each of the first supporting horizontal tube (3a) and the second supporting horizontal tube (3b) has a rotating shaft (8) coaxially arranged in the air guiding channel (14); the rotating shaft (8) has a first notched column (10a), a second notched column (10b), and a third notched column (10c) integrally arranged along its length. The first notched column (10a), the second notched column (10b), and the third notched column (10c) are... b) and the outer walls of the third notch column (10c) slide or have clearance fit with the inner wall of the air guide channel (14); the first notch column (10a), the second notch column (10b) and the third notch column (10c) correspond to the first strip air outlet (12a), the second strip air outlet (12b) and the third strip air outlet (12c) respectively; the outer walls of the first notch column (10a), the second notch column (10b) and the third notch column (10c) are respectively provided with a first air guide slot (11a), a second air guide slot (11b) and a third air guide slot (11c) through the length direction; From the axial perspective along the rotation axis (8), the first air guide slot (11a), the second air guide slot (11b) and the third air guide slot (11c) are staggered in orientation and are distributed in a circular array.

2. The preheating pretreatment system for the titanium alloy coil process according to claim 1, characterized in that: When the shaft (8) rotates along the axis to a certain state, the shaft (8) exists in the following four states: State A: When the first air guide slot (11a), the second air guide slot (11b), and the third air guide slot (11c) are not connected to the first strip air outlet (12a), the second strip air outlet (12b), and the third strip air outlet (12c), respectively, the outer walls of the first notch column (10a), the second notch column (10b), and the third notch column (10c) respectively block the first strip air outlet (12a), the second strip air outlet (12b), and the third strip air outlet (12c). State B: When the first air guide slot (11a) of the first notch column (10a) is connected to the first strip air outlet (12a), the outer cylindrical surfaces of the second notch column (10b) and the third notch column (10c) respectively block the corresponding second strip air outlet (12b) and third strip air outlet (12c). C state: When the second air guide slot (11b) of the second notch column (10b) is connected to the second strip air outlet (12b), the outer cylindrical surfaces of the first notch column (10a) and the third notch column (10c) respectively block the corresponding first strip air outlet (12a) and third strip air outlet (12c). State D: When the third air guide slot (11c) of the third notch column (10c) is connected to the third strip air outlet (12c), the outer cylindrical surfaces of the first notch column (10a) and the second notch column (10b) respectively block the corresponding second strip air outlet (12b) and third strip air outlet (12c).

3. The preheating pretreatment system for the titanium alloy coil process according to claim 2, characterized in that: Each shaft (8) is driven by an independent motor (5); a plugging post (9) is coaxially arranged on the outer side of the end of each shaft (8) near the motor (5), the plugging post (9) is plugged on the end of the air guide channel (14) near the motor (5), and the inner wall surface of the air guide channel (14) of the plugging post (9) slides or has clearance fit.

4. The working method of the preheating pretreatment system for titanium alloy coil processing according to claim 3, characterized in that: Two preset temperatures: temperature a and temperature b; temperature a is greater than temperature b; first, the temperature inside the preheating chamber (6) is raised to temperature a; the first piece of titanium alloy plate to be taken out is denoted as titanium alloy plate to be taken out 2a; Then, all the rotating shafts (8) in the first set of first support horizontal tubes (3a) and second support horizontal tubes (3b) on the upper side of the titanium alloy plate to be removed (2a) and the first set of first support horizontal tubes (3a) and second support horizontal tubes (3b) on the lower side of the titanium alloy plate to be removed (2a) are put into "D state"; all the remaining rotating shafts (8) are put into "A state"; and the circulating air pump and air heater (15) are turned on until the titanium alloy plate to be removed (2a) is heated to temperature b.

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