Preheating treatment device for die steel processing

Abstract

The utility model discloses a preheating treatment device for die steel processing, which comprises a heating box, a uniform heating device is arranged in the heating box, the bottom of the inner wall of the heating box is fixedly connected with a heating plate, the front surface of the outer wall of the heating box is provided with a controller, and the controller is electrically connected with the heating plate. The uniform heating device comprises a first servo motor which is fixedly connected to the lower portion of one side of the outer wall of the heating box through bolts and electrically connected with the controller. The utility model relates to the technical field of die steel, in particular to a preheating treatment device for die steel processing, which can be used for carrying out auxiliary heating on to-be-heated die steel above a heating box by utilizing waste heat when the die steel at the bottom of the heating box is heated through a uniform heating device, and can be used for carrying out auxiliary heating on the to-be-heated die steel above the heating box after the preheated die steel at the bottom is taken out. And the worker places the die steel subjected to auxiliary heating above the heating box to the bottom for preheating, so that the overall operation time is shortened, and the energy utilization rate is further increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to die steel technical field, concretely is the preheating treatment device for die steel processing. BACKGROUND

[0002] Die steel is used to manufacture cold punch mould, hot forging mould, die casting mould and the steel grade of mould. Mould is the main processing tool of the part manufacturing in the industrial department such as machinery manufacturing, wireless radio instrument, motor, electric appliance, etc.

[0003] At present, when the die steel is preheated, the worker first puts the die steel into the heating box, then starts the heating setting to heat the die steel, until the die steel is heated to the specified temperature, then the worker closes the heating equipment, and then takes out the die steel from the heating box, and completes the die steel preheating operation.

[0004] When the die steel is heated conventionally, the waste heat generated by heating will diffuse into the air, and the worker cannot effectively utilize the waste heat, thus resulting in large energy waste, and the die steel to be heated cannot be preheated, thus the die steel preheating efficiency is low, and it takes a lot of time to heat all the die steels. UTILITY MODEL CONTENT

[0005] In view of the deficiencies of the prior art, the utility model provides a preheating treatment device for die steel processing, which solves the problems that when the die steel is heated conventionally, the waste heat generated by heating will diffuse into the air, the worker cannot effectively utilize the waste heat, thus resulting in large energy waste, and the die steel to be heated cannot be preheated, thus the die steel preheating efficiency is low, and it takes a lot of time to heat all the die steels.

[0006] In order to achieve the above object, the utility model discloses a preheating device for die steel processing, including heating box, the inside of heating box is provided with even heating device, the inner wall bottom of heating box is fixedly connected with heating plate, the outer wall front of heating box is installed with controller, the controller is electrically connected with heating plate, even heating device includes: first servo motor is fixedly connected with the outer wall one side below of heating box through bolt, and is electrically connected with the controller, cross roller is set up multiple, both ends are rotatably connected with the inner wall below of heating box through bearing, and the cross roller of controller one side is fixed with the output end of first servo motor, pulley is set up multiple, is fixedly connected with multiple cross roller one side near first servo motor respectively, belt is installed on the outer wall of multiple pulley, bearing mechanism is set up below multiple cross roller, residual heat heating mechanism is set up in the inside upper portion of heating box, wherein, first servo motor rotates cross roller through pulley and belt, bearing mechanism supports cross roller, and residual heat heating mechanism carries out supplementary heating to the die steel of heating box upper portion to be heated.

[0007] Preferably, the bearing mechanism comprises: a bearing plate, provided with two, and fixedly connected to the inner wall below of the heating box, a plurality of ball bearings are provided on the inner wall of the top of the two bearing plates, and the outer wall is respectively matched with the outer wall of the plurality of cross rollers, wherein the ball bearings reduce the friction between the cross rollers and the bearing plates.

[0008] Preferably, the residual heat heating mechanism: a support plate is fixedly connected to the inner wall above of the heating box through bolts, two openings are provided and are respectively machined on the front and rear of the support plate, a placing plate is fixedly connected to the top of the support plate, a plurality of grooves are provided and are respectively machined on the top of the placing plate, wherein the residual heat passes through the support plate and the placing plate to assist the heating of the die steel to be heated above the heating box, and the grooves limit the die steel.

[0009] Preferably, the bottom of the residual temperature heating mechanism is provided with a material taking device, the material taking device comprises: two horizontal plates, both fixedly connected to the top of the inner wall of the heating box; two threaded rods, respectively arranged in the interiors of the two horizontal plates, and both ends rotatably connected to the top of the inner wall of the heating box through bearings; two second servo motors, both fixedly connected to the top of the outer wall of the heating box near the first servo motor through bolts, and the output ends of both fixedly connected to one end of the two threaded rods near the first servo motor, both electrically connected with the controller; two sliding blocks, both threadedly connected to one side of the two threaded rods near the second servo motor, and both abutted with the inner wall of the two horizontal plates; and two material taking rods, both fixedly connected to the top and bottom of the outer wall of the two sliding blocks and abutted with the inner wall of the two horizontal plates, the material taking rod on the top located in the interiors of the two openings of the horizontal plate; wherein the second servo motor drives the threaded rod to drive the sliding block and the material taking rod to move.

[0010] Preferably, the top of the heating box is provided with a pressure reducing device, the pressure reducing device comprises: a limiting plate fixedly connected to the top of the inner wall of the heating box; a baffle abutting against the top of the inner wall of the heating box and inserted into the inner wall of the limiting plate; and a spring sleeved on the outer wall of the baffle and fixedly connected to the limiting plate and the baffle at the top and the bottom; wherein the baffle moves along the inner wall of the limiting plate under stress and changes the shape of the spring.

[0011] Beneficial effects

[0012] The utility model provides a preheating treatment device for die steel processing. Have the following beneficial effects: this preheating treatment device for die steel processing passes through even heating device, when the die steel of heating box bottom is heated, can utilize the residual heat to the die steel of heating box top to be heated and carry out the auxiliary heating, when the die steel of bottom preheating is taken out, the worker again puts the die steel of heating box top after auxiliary heating to the bottom and preheats, so as to reduce the overall operation time, and also improve the energy utilization.

[0013] Through the material taking device, after the die steel is preheated, the material taking device can push one end of the die steel out of the heating box, and the worker can take out the remaining die steel from the heating box with external tools, avoiding the inconvenience of taking the die steel from the heating box. When the internal pressure of the heating box is too high, the pressure reducing device can discharge the pressure from the heating box, avoiding the danger of high internal pressure in the heating box. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The utility model structural schematic diagram is provided;

[0015] Figure 2 is a sectional view of the heating device and the material taking device; Figure 1

[0016] Figure 3 is another structural schematic view of the heating device and the material taking device; Figure 2

[0017] Figure 4 is a structural schematic view of the first servo motor, the belt pulley and the belt in the heating device; Figure 2

[0018] Figure 5 is a structural schematic view of the cross plate, the threaded rod and the second servo motor in the material taking device; Figure 2

[0019] Figure 6 is a structural schematic view of the limiting plate, the baffle and the spring. Figure 2 In the figure: 1, the heating box; 2, the heating device; 21, the first servo motor; 22, the cross roller; 23, the belt pulley; 24, the belt; 25, the bearing mechanism; 251, the bearing plate; 252, the ball; 26, the afterheat heating mechanism; 261, the support plate; 262, the opening; 263, the placing plate; 264, the groove; 3, the material taking device; 31, the cross plate; 32, the threaded rod; 33, the second servo motor; 34, the sliding block; 35, the material taking rod; 4, the pressure reducing device; 41, the limiting plate; 42, the baffle; 43, the spring; 5, the heating plate; 6, the controller.

[0020] DETAILED DESCRIPTION The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] By those skilled in the art, the parts in the present case are sequentially connected, and the specific connection and operation sequence should be referred to the following working principle. The detailed connection means is the commonly known technology in the art, and the following mainly introduces the working principle and process.

[0022] When the traditional mold steel is heated, the afterheat generated by heating will diffuse into the air, and the workers cannot effectively utilize the afterheat, thus resulting in large energy waste. Meanwhile, the mold steel to be heated cannot be preheated, thus the mold steel preheating efficiency is low, and a large amount of time is needed to heat all the mold steel.

[0023]

[0024] ​​​​​Therefore, the preheating device for die steel machining has the advantages that when the die steel at the bottom of the heating box is heated, the remaining heat can be used to assist in heating the die steel to be heated above the heating box, after the die steel preheated at the bottom is taken out, the worker can place the die steel preheated above the heating box at the bottom for preheating, so that the overall operation time is shortened, and the utilization rate of energy is improved.

[0025] Embodiment one: by Figure 1 、 2 , 3, 4 and 5, the preheating device for die steel machining comprises a heating box 1, the inside of the heating box 1 is provided with a uniform heating device 2, the inner wall bottom of the heating box 1 is fixedly connected with a heating plate 5, the outer wall front of the heating box 1 is installed with a controller 6, the controller 6 is electrically connected with the heating plate 5, the uniform heating device 2 comprises: a first servo motor 21, which is fixedly connected to the outer wall side below the heating box 1 and is electrically connected with the controller 6; a plurality of cross rollers 22, both ends of which are rotatably connected to the inner wall below the heating box 1 and the cross roller 22 close to the side of the controller 6 is fixedly connected with the output end of the first servo motor 21; a plurality of belt pulleys 23, which are fixedly connected to one side of the plurality of cross rollers 22 close to the first servo motor 21; a belt 24, which is installed on the outer wall of the plurality of belt pulleys 23; a bearing mechanism 25, which is arranged below the plurality of cross rollers 22; a residual heat heating mechanism 26, which is arranged inside the heating box 1 above; wherein the first servo motor 21 drives the cross roller 22 to rotate through the belt pulley 23 and the belt 24, the bearing mechanism 25 supports the cross roller 22, and the residual heat heating mechanism 26 assists in heating the die steel to be heated above the heating box 1;

[0026] In the specific implementation process, it is particularly worth pointing out that the models of the first servo motor 21, the heating plate 5 and the controller 6 are not limited, and they can meet the use requirements, the outer wall of the heating box 1 away from the side of the first servo motor 21 is provided with two wall doors, when the die steel is preheated, the worker opens the wall door and then cooperates with the material taking device 3 to take out the die steel, the heating plate 5 is electrically connected with the controller 6, the heating plate 5 can be controlled to heat or be turned off through the controller 6, and corresponding teeth are arranged between the plurality of belt pulleys 23 and the belt 24, so that when the belt pulley 23 close to the side of the first servo motor 21 is stressed to rotate, the belt pulley 23 close to the side of the first servo motor 21 can drive the remaining belt pulleys 23 to move synchronously through the belt 24;

[0027] Further, the bearing mechanism 25 comprises: two bearing plates 251, which are fixedly connected to the inner wall below the heating box 1; a plurality of ball bearings 252, which are arranged on the top inner wall of the two bearing plates 251 and are respectively matched with the outer walls of the plurality of cross rollers 22; wherein the ball bearings 252 reduce the friction between the cross rollers 22 and the bearing plates 251;

[0028] In the process of implementation, it is worth noting that when the worker puts a die steel above the two horizontal rollers 22, the die steel will transfer the weight to the two bearing plates 251 through the plurality of balls 252, so as to share the weight of the die steel, and the balls 252 can reduce the friction between the horizontal roller 22 and the bearing plate 251;

[0029] Further, the waste heat heating mechanism 26: the support plate 261 is fixedly connected above the inner wall of the heating box 1 by bolts; the openings 262 are provided two and are respectively machined in front of and behind the support plate 261; the placement plate 263 is fixedly connected to the top of the support plate 261; the grooves 264 are provided a plurality of and are respectively machined on the top of the placement plate 263; wherein, the waste heat from the support plate 261 and the placement plate 263 passes through the heating box 1 above the die steel to be heated to assist heating, and the grooves 264 limit the die steel;

[0030] In the process of implementation, it is worth noting that the support plate 261 and the placement plate 263 are both machined with a plurality of exhaust holes at equal intervals, and the waste heat generated by the heating plate 5 can pass through the support plate 261 and the placement plate 263, before heating the die steel, the worker first puts a part of the die steel above the plurality of horizontal rollers 22, and then puts the remaining die steel into the grooves 264 of the placement plate 263, so that when the worker uses the uniform heating device 2 to heat the die steel above the plurality of horizontal rollers 22, the waste heat can pass through the support plate 261 and the placement plate 263, and then assist heating the die steel inside the grooves 264 of the placement plate 263, until the worker preheats the die steel above the plurality of horizontal rollers 22, the worker uses the material taking device 3 to take out the die steel above the plurality of horizontal rollers 22 and the die steel inside the grooves 264 of the placement plate 263, then the die steel above the plurality of horizontal rollers 22 is subjected to the next operation, and finally the die steel inside the grooves 264 of the placement plate 263 is placed above the plurality of horizontal rollers 22 to continue preheating, so that the preheating time of the die steel inside the grooves 264 of the placement plate 263 can be reduced;

[0031] Specifically, when the preheating device for die steel processing is used, first, the worker opens the two wall doors of the heating box 1, and then places the die steel to be preheated on the plurality of horizontal rollers 22 above the grooves 264 in the placement plate 263, then the worker closes the two wall doors and controls the heating plate 5 to perform heating operation through the controller 6, and at the same time, the first servo motor 21 output end is controlled to rotate through the controller 6. When the first servo motor 21 output end rotates, it will drive the horizontal roller 22 close to the controller 6 to rotate along the inner wall of the heating box 1 through the bearing. At this time, the pulley 23 close to the controller 6 is affected by the rotation of the horizontal roller 22 and starts to rotate with the horizontal roller 22. When the pulley 23 close to the controller 6 rotates, it will drive the remaining pulleys 23 to rotate synchronously through the belt 24. When the remaining pulleys 23 rotate, they will also drive the remaining horizontal rollers 22 to rotate along the inner wall of the heating box 1 through the bearing, so that the plurality of horizontal rollers 22 rotate synchronously. At this time, the die steel above the plurality of horizontal rollers 22 is affected by the rotation of the plurality of horizontal rollers 22 and starts to rotate along the outer wall of the plurality of horizontal rollers 22. In combination with the heating plate 5, the die steel is continuously heated, so that the die steel above the plurality of horizontal rollers 22 can be uniformly preheated. After the die steel is heated to a specified temperature, the worker turns off the heating plate 5 and the first servo motor 21 through the controller 6, and completes the uniform preheating of the die steel.

[0032] Example two: by Figure 1 、 2 , 3 and 5, the lower part of the residual heat heating mechanism 26 is provided with a taking device 3, the taking device 3 comprises: two horizontal plates 31, which are fixedly connected to the upper part of the inner wall of the heating box 1; two threaded rods 32, which are arranged in the interiors of the two horizontal plates 31 and have two ends rotatably connected to the upper part of the inner wall of the heating box 1 through bearings; two second servo motors 33, which are fixedly connected to the upper part of the outer wall of the heating box 1 close to the first servo motor 21 through bolts, and have output ends fixedly connected to the ends close to the first servo motor 21 of the two threaded rods 32, and the two second servo motors 33 are electrically connected with the controller 6; two sliding blocks 34, which are threadedly connected to the sides close to the second servo motors 33 of the two threaded rods 32 and abut the inner walls of the two horizontal plates 31, respectively; two taking rods 35, which are fixedly connected to the top and bottom of the outer wall of the two sliding blocks 34 and abut the inner walls of the two horizontal plates 31, respectively, and the upper taking rod 35 is located in the two openings 262 of the support plate 261; wherein the second servo motor 33 drives the threaded rod 32 to drive the sliding block 34 and the taking rod 35 to move;

[0033] In the implementation process, it is particularly worth noting that the model of the second servo motor 33 is not limited, and it can meet the use requirements. When the material taking rod 35 near the side of the supporting plate 261 is forced to move, the material taking rod 35 near the side of the supporting plate 261 will move inside the two openings 262 of the supporting plate 261. In this way, the material taking rod 35 near the side of the supporting plate 261 can avoid being blocked by the supporting plate 261 when it moves. A synchronizer should be provided between the two second servo motors 33. Workers can use the synchronizer to control the two second servo motors 33 to work synchronously. Therefore, it can be ensured that the two second servo motors 33 can better drive the two threaded rods 32 and the two sliding blocks 34 to move, thereby realizing the normal operation of the two material taking rods 35. When taking the material, the workers control the output ends of the two second servo motors 33 to rotate clockwise synchronously through the controller 6. At this time, the two material taking rods 35 are affected by the rotation of the output ends of the two second servo motors 33 and begin to move away from the two second servo motors 33. In this way, the mold steel at one end can be pushed out of the inside of the heating box 1. After the workers use an external tool to take out the remaining part of the mold steel, the workers control the output ends of the two second servo motors 33 to rotate counterclockwise synchronously through the controller 6. At this time, the two material taking rods 35 are affected by the rotation of the output ends of the two second servo motors 33 and begin to move towards the two second servo motors 33. When the two material taking rods 35 return to the initial position, the workers turn off the two second servo motors 33 through the controller 6.

[0034] Specifically, on the basis of the above embodiment one, when the mold steel is preheated, the workers first open the two wall doors of the heating box 1. The output ends of the two second servo motors 33 are controlled to rotate clockwise synchronously through the controller 6. The rotation of the output ends of the two second servo motors 33 will drive the two threaded rods 32 to rotate along the inner wall of the heating box 1 through the bearing. At this time, the two sliding blocks 34 begin to move away from the two second servo motors 33 along the outer wall of the two threaded rods 32 through the threads, and simultaneously drive the two material taking rods 35 to move away from the two second servo motors 33. When the two material taking rods 35 respectively contact the mold steel above the plurality of horizontal rollers 22 and the mold steel inside the groove 264 of the placement plate 263, the mold steel above the plurality of horizontal rollers 22 and the mold steel inside the groove 264 of the placement plate 263 are affected by the pushing of the two material taking rods 35 and begin to move away from the two second servo motors 33. After the mold steel above the plurality of horizontal rollers 22 and the mold steel inside the groove 264 of the placement plate 263 move to the outside of the heating box 1, the workers turn off the two second servo motors 33 through the controller 6, then use an external tool to take out all the mold steel from the inside of the heating box 1, and perform the next operation on the mold steel above the plurality of horizontal rollers 22. Then, the mold steel inside the groove 264 of the placement plate 263 is placed on the plurality of horizontal rollers 22 to continue preheating. Finally, new mold steel is placed inside the groove 264 of the placement plate 263 for auxiliary heating.

[0035] Embodiment three: by Figure 1 、 2 and 6, it is known that the upper part of the heating box 1 is provided with a pressure reducing device 4, the pressure reducing device 4 comprises: a limiting plate 41 fixedly connected to the inner wall top of the heating box 1; a baffle 42 abutting against the inner wall top of the heating box 1 and inserted into the inner wall of the limiting plate 41; a spring 43 sleeved on the outer wall of the baffle 42 and having the top and bottom parts fixedly connected with the limiting plate 41 and the baffle 42 respectively; wherein the baffle 42 is forced to move along the inner wall of the limiting plate 41 and change the shape of the spring 43;

[0036] In the specific implementation process, it is particularly worth pointing out that the top of the heating box 1 is processed with an exhaust port, when the worker preheats the die steel, the baffle 42 will block the exhaust port at the top of the heating box 1, so that the heat in the heating box 1 can be prevented from flowing out of the exhaust port, and the worker needs to replace the spring 43 regularly to avoid the decrease of the elastic potential of the spring 43 after long-term use;

[0037] Specifically, on the basis of the above-mentioned embodiment one, when the worker heats the die steel, the air pressure in the heating box 1 will begin to increase, when the air pressure in the heating box 1 reaches a certain degree, the air pressure will push the baffle 42 to move along the inner wall of the limiting plate 41, at this time the spring 43 will be compressed by the extrusion of the baffle 42, until the air pressure pushes the baffle 42 to separate from the exhaust port at the top of the heating box 1, at this time a gap will be generated between the baffle 42 and the heating box 1, the air pressure in the heating box 1 can be discharged out of the inside of the heating box 1 through the gap, until the air pressure in the heating box 1 decreases, the air pressure can no longer lift the baffle 42, at this time the spring 43 is no longer affected by the pushing of the baffle 42, and begins to restore the original state and drive the baffle 42 to return to the initial position, when the baffle 42 returns to the initial position, the exhaust port at the top of the heating box 1 will be blocked by the baffle 42, at this time the air pressure in the heating box 1 cannot be discharged through the exhaust port at the top of the heating box 1.

[0038] It should be noted that in this document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the statement "including a limited element" does not exclude the existence of other identical elements in the process, method, article or equipment including the element.

[0039] In the utility model, unless another explicit provision and limitation, the terms "mount", "set", "connect", "fix", "screw" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can indirectly connect through the intermediate medium, can be two element internal communication or two element's mutual action relation, unless another explicit limitation, for the ordinary skill in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0040] Although the embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A preheating device for die steel machining, comprising a heating box (1), characterized in that: The inside of the heating box (1) is provided with a uniform heating device (2), the inner wall bottom of the heating box (1) is fixedly connected with a heating plate (5), the outer wall front of the heating box (1) is provided with a controller (6), the controller (6) is electrically connected with the heating plate (5), and the uniform heating device (2) comprises: A first servo motor (21) is fixedly connected to the lower side of the outer wall of the heating box (1) through bolts and is electrically connected with the controller (6); A plurality of horizontal rollers (22) are rotatably connected to the lower inner wall of the heating box (1) through bearings, and the horizontal roller (22) close to the side of the controller (6) is fixedly connected with the output end of the first servo motor (21); A plurality of belt pulleys (23) are fixedly connected to the side close to the first servo motor (21) of the plurality of horizontal rollers (22); A belt (24) is installed on the outer wall of the plurality of belt pulleys (23); A bearing mechanism (25) is arranged below the plurality of horizontal rollers (22); A residual heat heating mechanism (26) is arranged above the inside of the heating box (1); Wherein, the first servo motor (21) drives the horizontal roller (22) to rotate through the belt pulley (23) and the belt (24), the bearing mechanism (25) supports the horizontal roller (22), and the residual heat heating mechanism (26) assists in heating the mold steel to be heated above the heating box (1).

2. The preheating device for die steel machining according to claim 1, characterized in that: The bearing mechanism (25) comprises: Two bearing plates (251) are fixedly connected to the lower inner wall of the heating box (1); A plurality of ball bearings (252) are arranged on the top inner wall of the two bearing plates (251), and the outer walls are respectively matched with the outer walls of the plurality of horizontal rollers (22); Wherein, the ball bearings (252) reduce the friction between the horizontal rollers (22) and the bearing plates (251).

3. The preheating device for die steel machining according to claim 1, characterized in that: The residual heat heating mechanism (26) comprises: A support plate (261) is fixedly connected to the upper inner wall of the heating box (1) through bolts; Two openings (262) are respectively machined on the front and rear of the support plate (261); A placing plate (263) is fixedly connected to the top of the support plate (261); A plurality of grooves (264) are machined on the top of the placing plate (263); Wherein, the residual heat passes through the support plate (261) and the placing plate (263) to assist in heating the mold steel to be heated above the heating box (1), and the grooves (264) limit the mold steel.

4. The preheating apparatus for die steel machining according to claim 1, characterized by: A material taking device (3) is arranged below the residual heat heating mechanism (26), and the material taking device (3) comprises: Two horizontal plates (31) are fixedly connected to the upper inner wall of the heating box (1); Two threaded rods (32) are arranged in the interiors of the two horizontal plates (31), and the two ends are respectively rotatably connected to the upper inner wall of the heating box (1) through bearings; Second servo motor (33), set two, are fixedly connected by bolts on the side of the outer wall of the heating box (1) near the first servo motor (21) top, and the output end is respectively fixed with two threaded rods (32) near the first servo motor (21) one end, two second servo motor (33) are electrically connected with the controller (6); Slide block (34), set two, are respectively threaded on two threaded rods (32) near the second servo motor (33) side, and are respectively attached to the inner wall of two horizontal plates (31); Material taking rod (35), provided with two, are respectively fixedly connected to the outer wall top and bottom of two slide blocks (34), and are respectively attached to the inner wall of two horizontal plates (31), the material taking rod (35) located in the upper part is located in the two openings (262) of the support plate (261) inside; Wherein, the second servo motor (33) drives threaded rod (32) to drive slide block (34) and material taking rod (35) movement.

5. The preheating device for mold steel machining according to claim 1, characterized in that: The upper part of the heating box (1) is provided with a pressure reducing device (4), and the pressure reducing device (4) comprises: Limiting plate (41), fixedly connected to the inner wall top of the heating box (1); Baffle (42), abuts against the inner wall top of the heating box (1), and is inserted into the inner wall of the limiting plate (41); Spring (43), sleeve jointed on the outer wall of the baffle (42), and the top and bottom are respectively fixed with the limiting plate (41) and baffle (42); Wherein, the baffle (42) is stressed along the inner wall of the limiting plate (41) and changes the form of the spring (43).

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