Workpiece heating furnace

Abstract

The utility model belongs to the technical field of workpiece machining, and particularly relates to a workpiece heating furnace. The furnace bottom is arranged on the machine base, the furnace bottom is annular, and the annular furnace bottom is connected with a driving assembly for driving the annular furnace bottom to rotate around the center of the furnace bottom; the furnace cover is arranged on the machine base, and the furnace cover covers part of the furnace bottom; the furnace cover is connected with a heating assembly, and a heating cavity is formed in the furnace cover; the furnace cover is provided with an inlet and an outlet, the furnace bottom located outside the furnace cover is used for containing workpieces, and the workpieces are driven by the furnace bottom to enter the furnace cover from the inlet or be sent out of the furnace cover from the inlet. Due to the fact that conveying of the workpieces is controlled by the driving assembly, a user can control the amount of the workpieces fed into the heating furnace by controlling starting and stopping of the feeding assembly, namely the amount of the workpieces fed according to the needed machining amount, and the situation that the workpieces are left in the heating furnace for secondary heating is effectively prevented.

Description

Technical Field

[0001] This patent belongs to the field of workpiece processing technology, specifically a workpiece heating furnace. Background Art

[0002] The workpiece needs to be heated before hot stamping. The heating is usually carried out by heating the workpiece while conveying it into the heating furnace. Most existing heating furnaces use push rods to push the workpieces into the heating furnace one by one, and the next workpiece pushes the previous workpiece to achieve conveyance.

[0003] This method has the following defects: when the workpiece processing is paused, the workpiece in the furnace cannot be taken out in time, resulting in the workpiece in the heating furnace being heated again when the processing resumes, thereby affecting the final quality of the workpiece. Summary of the Invention

[0004] The purpose of this patent is to provide a workpiece heating furnace that effectively reduces the occurrence of secondary heating of workpieces.

[0005] The purpose of this patent is achieved as follows:

[0006] A workpiece heating furnace, comprising:

[0007] base;

[0008] A furnace bottom is arranged on the machine base, the furnace bottom is annular, and is connected to a driving assembly that drives the furnace bottom to rotate around the center of the furnace bottom;

[0009] A furnace cover is provided on the machine base, and the furnace cover is provided on a portion of the furnace bottom; the furnace cover is connected to a heating assembly, and a heating cavity is formed in the furnace cover;

[0010] The furnace cover has an inlet and an outlet. The furnace bottom located outside the furnace cover is used to place workpieces, and the workpieces are driven by the furnace bottom to enter the furnace cover from the inlet or be sent out of the furnace cover from the inlet.

[0011] Furthermore, the driving assembly includes an inner rotating ring and an outer rotating ring arranged inside and outside, the inner rotating ring is fixed on the machine base, the outer rotating ring is connected to the furnace bottom, and a sliding connection part is provided between the inner rotating ring and the outer rotating ring, and the sliding connection part is used to make the outer rotating ring slide relative to the inner rotating ring; the driving assembly also includes a driving source that drives the outer rotating ring to slide around the inner rotating ring.

[0012] Furthermore, a height difference is provided between the inner rotating ring and the outer rotating ring, and the outer rotating ring is suspended above the machine base through the sliding connection portion.

[0013] Furthermore, the outer ring surface of the outer rotating ring is a tooth surface, and the driving source includes a rotating gear meshing with the outer rotating ring.

[0014] Furthermore, opposite annular grooves are provided on the inner sides of the outer rotating ring and the inner rotating ring, and the two annular grooves are matched to form a channel, and the sliding connection portion includes a plurality of sliding balls located in the channel.

[0015] Furthermore, the furnace bottom includes a support base and refractory bricks fixed on the support base, and the refractory bricks are used to place workpieces; the support base is connected to the drive assembly.

[0016] Furthermore, the refractory bricks are provided with placement grooves for placing workpieces.

[0017] Furthermore, the furnace cover includes a plurality of fan-shaped cover bodies which are sequentially buckled on the furnace bottom, and the plurality of fan-shaped cover bodies are sequentially connected.

[0018] Furthermore, the top of the furnace cover is provided with a plurality of heating holes, and the heating assembly includes a plurality of heating nozzles inserted in the heating holes, and the heating nozzles are connected to a heating source for heating the heating cavity.

[0019] Furthermore, a main delivery pipe is provided in the center of the furnace bottom, and a diverter is provided on the top of the main delivery pipe; the heating nozzle is connected to an auxiliary delivery pipe, and multiple auxiliary delivery pipes are connected to the diverter located in the furnace bottom.

[0020] Compared with the existing technology, this patent has the following outstanding and beneficial technical effects:

[0021] 1. In this patent, since the conveyance of the workpiece is controlled by the driving component, the user can control the amount of workpieces fed into the heating furnace by controlling the start and stop of the loading component, that is, feed in as many workpieces as needed for processing, effectively preventing the workpieces from remaining in the heating furnace for secondary heating.

[0022] 2. This patent uses the driving form of the inner rotating ring and the outer rotating ring, which is different from the conveying structure in the traditional industry. The conveying structure in this patent is adapted to the operation of the heating furnace and will not be affected by the high temperature of the heating furnace.

[0023] 3. The annular furnace bottom structure effectively reduces its footprint and is more flexible to install and use.

[0024] 4. The heating nozzles are connected to the diversion heads in sequence through auxiliary delivery pipes, and natural gas is delivered to all pipelines through the main delivery pipe, which effectively utilizes the middle space of the furnace bottom annular structure and saves volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the workpiece processing line.

[0026] Figure 2 This is a schematic diagram of the explosion of the workpiece heating furnace.

[0027] Figure 3 It is a structural diagram of the outer rotating ring and the outer rotating ring.

[0028] Figure 4 It is a cross-sectional schematic diagram of a workpiece heating furnace.

[0029] Figure 5 It is a structural diagram of the heating device.

[0030] Figure 6 This is a disassembled schematic diagram of the first control valve.

[0031] Figure 7 It is a schematic cross-sectional diagram of the exploded view of the first control valve.

[0032] Figure 8 It is a truncated schematic diagram of the nozzle.

[0033] The meaning of the numbers in the figure:

[0034] 1. Machine base;

[0035] 2. Furnace bottom; 21. Refractory bricks; 211. Placement groove; 22. Support seat; 221. Retaining edge;

[0036] 3. Drive assembly; 31. Inner rotating ring; 32. Outer rotating ring; 331. Ring groove; 332. Sliding ball; 34. Rotating gear;

[0037] 4. Furnace cover; 41. Heating chamber; 42. Inlet; 43. Outlet; 44. Fan-shaped cover; 45. Heating hole;

[0038] 5. Heating nozzle; 51. Spray chamber; 52. Air outlet; 53. Partition; 531. Pressurization hole; 54. Diverter plate; 541. Main nozzle; 542. Auxiliary nozzle; 55. First connecting section; 56. Second connecting section; 57. Third connecting section;

[0039] 6. Main delivery pipe; 61. Diverter; 62. Auxiliary delivery pipe; 63. First control valve; 631. Valve body; 632. Air inlet chamber; 633. Air outlet chamber; 634. Valve core; 635. V-shaped opening; 636. Stepper motor; 64. Pressure source; 65. Gas source;

[0040] 7. Loading mechanism; 71. Vibrating plate; 72. Conveying channel; 8. Unloading mechanism; 81. Robot; 82. Conveyor belt; DETAILED DESCRIPTION

[0041] The present invention is further described below with reference to specific embodiments:

[0042] A workpiece heating furnace, such as Figure 1As shown, the workpiece heating furnace in this patent is used in a red punching workpiece processing line. The workpiece heating furnace is located in the middle of the line. There are a loading mechanism 7 and a unloading mechanism 8 on both sides of the workpiece heating furnace. The loading mechanism 7 is used to transport the workpiece into the workpiece heating furnace, and the unloading mechanism 8 is used to transport the workpiece from the workpiece heating furnace. Specifically, the loading mechanism 7 is a vibrating plate 71, and the vibrating plate 71 is connected to a conveying channel 72. The conveying channel 72 is connected to the workpiece heating furnace, and the workpiece can be gradually sent into the workpiece heating furnace through the vibrating plate 71; the unloading mechanism 8 is specifically a conveyor belt 82, and one end of the conveyor belt 82 has a manipulator 81 located on one side of the workpiece heating furnace. After the workpiece is heated, it is transported to the conveyor belt 82 by the manipulator 81 and sent out by the conveyor belt 82.

[0043] Combine Figure 1 、 2 As shown, the workpiece heating furnace includes a machine base 1, a furnace bottom 2, and a furnace cover 4. The machine base 1 is annular in shape and corresponds to the annular furnace bottom 2. A bracket can be provided below the machine base 1 to support the entire machine base 1 so that the height of the machine base 1 corresponds to the above-mentioned loading mechanism 7 and unloading mechanism 8. The annular furnace bottom 2 is provided on the machine base 1. The annular furnace bottom 2 is connected to a drive assembly 3 that drives it to rotate around the center of the furnace bottom 2. The furnace cover 4 is provided on the machine base 1. The furnace cover 4 covers a portion of the furnace bottom 2. The furnace cover 4 is connected to a heating assembly, and a heating chamber 41 is formed within the furnace cover 4. The furnace cover 4 has an inlet 42 and an outlet 43. The furnace bottom 2 located outside the furnace cover 4 is used to place the workpiece, and the workpiece is driven by the furnace bottom 2 to enter the furnace cover 4 from the inlet 42 or to be sent out of the furnace cover 4 from the inlet 42.

[0044] Combine Figure 1-3 As shown, the machine base 1 in this patent includes a support seat 22 and a refractory brick 21 fixed on the support seat 22. The support seat 22 is in the shape of a circular ring as a whole, and a rib 221 is provided on the edge of the support seat 22. The refractory brick 21 has several blocks, and its longitudinal cross-section is fan-shaped. Several refractory bricks 21 are arranged in sequence on the support seat 22 to form a link structure, and the rib 221 on the edge of the support seat 22 is used to achieve positioning. The driving component 3 is connected to the bottom of the support seat 22. The upper surface of the refractory brick 21 is used to place the workpiece. The driving component 3 drives the support seat 22 to rotate, thereby driving the refractory brick 21 to move, thereby driving the movement of the workpiece on the refractory brick 21. In order to facilitate the placement of the workpiece, a placement groove 211 will be fired on the refractory brick 21 when the refractory brick 21 is fired, so as to better place the workpiece.

[0045] Combine Figure 2-4As shown, the driving assembly 3 includes an inner rotating ring 31 and an outer rotating ring 32 arranged inside and outside, the inner rotating ring 31 is fixed on the machine base 1, and the outer rotating ring 32 is connected to the furnace bottom 2. A sliding connection part is provided between the inner rotating ring 31 and the outer rotating ring 32, and the sliding connection part is used to make the outer rotating ring 32 slide relative to the inner rotating ring 31; the driving assembly 3 also includes a driving source that drives the outer rotating ring 32 to slide around the inner rotating ring 31.

[0046] In this embodiment, the inner rotating ring 31 and the outer rotating ring 32 are made of metal. The inner rotating ring 31 and the outer rotating ring 32 are provided with a plurality of fastening holes arranged along their thickness. Fasteners are provided in the fastening holes to secure the inner rotating ring 31 and the outer rotating ring 32 to the machine base 1 and the furnace bottom 2, respectively. The fasteners are fastening screws. The fastening holes are arranged in sequence, and the connection is achieved by installing the fasteners in the fastening holes.

[0047] Furthermore, the inner sides of the outer rotating ring 32 and the inner rotating ring 31 are provided with opposing annular grooves 331, and the sliding connection includes a plurality of sliding balls 332 located between the two annular grooves 331. The sliding balls 332 are made of steel. Since the outer rotating ring 32 and the inner rotating ring 31 are fitted inside and outside, the sliding balls 332 are confined in the annular grooves 331 on the inner sides of the outer rotating ring 32 and the inner rotating ring 31. When the outer rotating ring 32 is driven to rotate, the sliding balls 332 slide between the outer rotating ring 32 and the inner rotating ring 31, thereby maintaining a flexible and slidable state for the outer rotating ring 32.

[0048] Furthermore, the outer ring surface of the outer rotating ring 32 is toothed, and the driving source includes a rotating gear 34 that meshes with the outer rotating ring 32. The rotating gear 34 is mounted on the machine base 1, located on one side of the outer rotating ring 32. A motor is connected to the rotating gear 34, which is driven by the motor to rotate the rotating gear 34. The rotating gear 34 meshes with the outer rotating ring 32, driving the outer rotating ring 32 to rotate. Because a sliding connection is provided between the outer rotating ring 32 and the inner rotating ring 31, friction between the two rings is low, allowing the rotating gear 34 to easily rotate the outer rotating ring 32. Furthermore, in this embodiment, a height difference is provided between the inner rotating ring 31 and the outer rotating ring 32, allowing the sliding connection to suspend the outer rotating ring 32 above the machine base 1. Specifically, the steel balls support the entire outer rotating ring 32, and thus the entire furnace bottom 2. Therefore, the rotating gear 34 alone is sufficient to drive the outer rotating ring 32 to rotate.

[0049] Furthermore, the furnace hood 4 includes several fan-shaped hoods 44 that are sequentially buckled onto the furnace bottom 2, and several fan-shaped hoods 44 are sequentially connected. The fan-shaped hoods 44 are also made of refractory bricks 21. Several fan-shaped hoods 44 are sequentially connected to cover most of the furnace bottom 2. The bottom of the fan-shaped hoods 44 is supported on the machine base 1. The side cross-section of the fan-shaped hood 44 is in the shape of a "door". After several fan-shaped hoods 44 are connected, an inlet 42 and an outlet 43 are formed at their ends. The inlet 42 and outlet 43 are located on the furnace bottom 2 outside the furnace hood 4. At this time, workpieces can be driven by the furnace bottom 2 to enter the furnace hood 4 through the inlet 42 or be sent out of the furnace hood 4 through the inlet 42.

[0050] During operation, the loading mechanism 7 places the workpiece on the furnace bottom 2 outside the furnace cover 4. The furnace bottom 2 moves in one direction driven by the driving component 3, so that the workpiece enters the furnace cover 4. Since a heating component is connected to the furnace cover 4, the heating component will heat the workpiece located in the furnace cover 4, that is, in the heating chamber 41. After the furnace bottom 2 rotates one circle, it is sent out from the other end of the furnace cover 4, that is, its outlet 43, and then sent out by the unloading component.

[0051] Since the conveying of the workpiece is controlled by the drive assembly 3, the user can control the amount of workpieces fed into the heating furnace by controlling the start and stop of the loading assembly, that is, the amount of workpieces fed into the heating furnace is determined by the amount of workpieces that need to be processed, effectively preventing the workpieces from remaining in the heating furnace for secondary heating. Moreover, the driving form of the inner rotating ring 31 and the outer rotating ring 32 in this patent is different from the conveying structure in traditional industry. The conveying structure in this patent is adapted to the operation of the heating furnace and will not be affected by the high temperature of the heating furnace. In addition, the annular furnace bottom 2 structure effectively reduces its footprint, making it more flexible to install and use.

[0052] Furthermore, the top of the furnace hood 4 is provided with a plurality of heating holes 45. The heating assembly includes a plurality of heating nozzles 5 inserted into the heating holes 45. The heating nozzles 5 are connected to a heat source and are used to heat the heating chamber 41. A main delivery pipe 6 is provided in the center of the furnace bottom 2, with a diverter 61 located at the top of the main delivery pipe 6. The heating nozzles 5 are connected to auxiliary delivery pipes, and multiple auxiliary delivery pipes are connected to the diverter 61 located in the furnace bottom 2. The heating nozzles 5 are sequentially connected to the diverter 61 through the auxiliary delivery pipes. Natural gas is delivered to all pipelines through the main delivery pipe 6, effectively utilizing the central space of the annular structure of the furnace bottom 2 and saving volume.

[0053] Furthermore, the heating source includes a gas source 65 and a pressure source 64. The gas source 65 is connected to a first control valve 63 located below the workpiece heating furnace. In fact, the gas source 65 is an external gas pipeline, which is connected to the first control valve 63, and then connected to the main delivery pipe 6 by the first control valve 63. The main delivery pipe 6 is arranged vertically, and the first control valve 63 is connected to the bottom of the main delivery pipe 6 through a pipeline. The pressure source 64 is specifically a fan, and the air outlet of the fan is connected to the bottom of the main delivery pipe 6 through a pipeline. At this time, the air intake size of the gas pipeline is controlled by the first control valve 63, and the air pressure is controlled by adjusting the power of the fan. The diverter 61 is provided at the top of the main delivery pipe 6.

[0054] During operation, the first control valve 63 is opened and the pressure source 64 is working. At this time, the gas and the outside air are simultaneously transported to the main delivery pipe 6. The user can adjust the first control valve 63 and the fan power to obtain a suitable gas-air ratio, thereby obtaining a mixed gas that is most suitable for the operation of the heating furnace, so that the gas content in the mixed gas meets the combustion requirements and has sufficient pressure; the mixed gas will be driven by the pressure source 64 and sent into the heating nozzle 5 and then sprayed into the workpiece heating furnace. At this time, combustion can be achieved only in the workpiece heating furnace.

[0055] In summary, the present patent mixes the gas and air in advance through the main delivery pipe 6 structure, and distributes them one by one into different heating nozzles 5 to achieve heating. The user can well control the ratio of gas to air through the first control valve 63, which can effectively save gas and save costs while ensuring the normal operation of the workpiece heating furnace. Moreover, the overall structure of the main delivery pipe 6 diversion structure in the present patent is streamlined and easy to set up.

[0056] Furthermore, the first control valve 63 includes a valve body 631, an air inlet cavity 632 and an air outlet cavity 633 are respectively provided on both sides of the valve body 631, and a valve core 634 is slidably provided between the air inlet cavity 632 and the air outlet cavity 633. Figure 5 、 6As shown, in fact, a stepper motor 636 is provided on one side of the valve body 631, and the valve core 634 is driven by the stepper motor 636. The valve body 631 is fixed to one end face of the stepper motor 636 by fasteners, and the valve core 634 is placed in the valve body 631. The valve body 631 is respectively provided with through holes on the left and right sides to form the air inlet cavity 632 and the air outlet cavity 633. The air inlet cavity 632 is connected to the external gas pipeline, and the air outlet cavity 633 is connected to the main delivery pipe 6; the valve core 634 is located between the air inlet cavity 632 and the air outlet cavity 633, and the valve core 634 is driven to rise and fall by the stepper motor 636 to block the valve core 634 between the air inlet cavity 632 and the air outlet cavity 633, or to make the air inlet cavity 632 and the air outlet cavity 633 connected.

[0057] Furthermore, if Figure 7 As shown, one end of the valve core 634 is provided with a V-shaped opening 635 that opens outward, and the two sides of the V-shaped opening 635 are respectively opposite to the air inlet cavity 632 and the air outlet cavity 633. During the opening of the valve core 634, the gas will enter the air outlet cavity 633 from the air inlet cavity 632 through the V-shaped opening 635; at this time, the gas intake amount depends on the area of ​​the intersection of the end face of the air outlet cavity 633 and the V-shaped opening 635. The size of the V-shaped opening 635 can help to better control the gas intake amount.

[0058] Furthermore, a spray cavity 51 is formed in the heating nozzle 5, and an air outlet 52 is provided on one end of the heating nozzle 5; the other end of the heating nozzle 5 is connected to the main delivery pipe 6. Figure 5 、 8 As shown, the heating nozzle 5 in this patent is composed of three parts, which includes a cylindrical first connecting section 55, one end of the first connecting section 55 is connected to the diverter head 61 through a connecting pipe, and the other end is connected to the second connecting section 56, and the other end of the second connecting section 56 is provided with a third connecting section 57. A partition 53 is fixed between the first connecting section 55 and the second connecting section 56, and a small boosting hole 531 is provided in the center of the partition 53. When the mixed gas passes through the small boosting hole 531, its pressure is increased by compressing the size of the mixed gas, thereby obtaining a better gas ejection effect.

[0059] A diverter plate 54 is also provided between the second connecting section 56 and the third connecting section 57. The other end of the third connecting section 57 is provided with an outlet 52 for outwardly ejecting gas. The diverter plate 54 is designed to optimize the combustion effect of the gas after ejection. Specifically, a main nozzle 541 is provided at the center of the diverter plate 54, and a plurality of auxiliary nozzles 542 are distributed along the outer edge of the main nozzle 541. The main nozzle 541 is used to eject the main flame, while the auxiliary nozzles 542 also eject auxiliary flames. However, since the main nozzle 541 is larger than the auxiliary nozzles 542, the outer flame of the auxiliary flame is located at the core of the main flame. This causes the outer flame of the auxiliary flame to compensate for the temperature at the core of the flame, thereby allowing the gas to burn better and more fully.

[0060] The above embodiments are only preferred embodiments of this patent and are not intended to limit the scope of protection of this patent. Therefore, any equivalent changes made based on the structure, shape, and principle of this patent should be covered within the scope of protection of this patent.

[0061] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification for understanding and reading by those familiar with this technology. They are not intended to limit the conditions for the implementation of this patent and therefore have no substantial technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size, without affecting the efficacy and objectives of this patent, should still fall within the scope of the technical content disclosed in this patent. At the same time, terms such as "upper," "lower," "left," "right," "center," and "one" cited in this specification are only for the convenience of description and are not intended to limit the scope of the implementation of this patent. Changes or adjustments in their relative relationships, without substantially changing the technical content, should also be considered within the scope of the implementation of this patent.

[0062] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0063] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

Claims

1. A workpiece heating furnace, characterized in that: include: Machine base (1); A furnace bottom (2) is arranged on the machine base (1), the furnace bottom (2) is annular, and the annular furnace bottom (2) is connected to a driving assembly (3) that drives it to rotate around the center of the furnace bottom (2); A furnace cover (4) is provided on the machine base (1), and the furnace cover (4) is provided on a portion of the furnace bottom (2); the furnace cover (4) is connected to a heating component, and a heating cavity (41) is formed in the furnace cover (4); The furnace cover (4) has an inlet (42) and an outlet (43); the furnace bottom (2) located outside the furnace cover (4) is used to place workpieces, and the workpieces are driven by the furnace bottom (2) to enter the furnace cover (4) from the inlet (42) or to be sent out of the furnace cover (4) from the inlet (42).

2. A workpiece heating furnace according to claim 1, characterized in that: The driving assembly (3) comprises an inner rotating ring (31) and an outer rotating ring (32) which are arranged inside and outside, the inner rotating ring (31) being fixed on the machine base (1), the outer rotating ring (32) being connected to the furnace bottom (2), and a sliding connection portion being provided between the inner rotating ring (31) and the outer rotating ring (32), the sliding connection portion being used to enable the outer rotating ring (32) to slide relative to the inner rotating ring (31); the driving assembly (3) further comprises a driving source for driving the outer rotating ring (32) to slide around the inner rotating ring (31).

3. A workpiece heating furnace according to claim 2, characterized in that: A height difference is provided between the inner rotating ring (31) and the outer rotating ring (32), and the outer rotating ring (32) is suspended above the machine base (1) through the sliding connection portion.

4. A workpiece heating furnace according to claim 2, characterized in that: The outer ring surface of the outer rotating ring (32) is a tooth surface, and the driving source includes a rotating gear (34) meshing with the outer rotating ring (32).

5. The workpiece heating furnace according to claim 2, characterized in that: The inner sides of the outer rotating ring (32) and the inner rotating ring (31) are provided with opposite annular grooves (331), and the two annular grooves (331) are matched to form a channel. The sliding connection portion includes a plurality of sliding balls (332) located in the channel.

6. A workpiece heating furnace according to any one of claims 1 to 5, characterized in that: The furnace bottom (2) comprises a support seat (22) and refractory bricks (21) fixed on the support seat (22), and the refractory bricks (21) are used to place workpieces; the support seat (22) is connected to the drive assembly (3).

7. The workpiece heating furnace according to claim 6, characterized in that: The refractory brick (21) is provided with a placement groove (211) for placing a workpiece.

8. The workpiece heating furnace according to claim 1, characterized in that: The furnace cover (4) comprises a plurality of fan-shaped cover bodies (44) which are sequentially buckled on the furnace bottom (2), and the plurality of fan-shaped cover bodies (44) are sequentially connected.

9. The workpiece heating furnace according to claim 1, characterized in that: The top of the furnace cover (4) is provided with a plurality of heating holes (45), and the heating assembly comprises a plurality of heating nozzles (5) inserted into the heating holes (45). The heating nozzles (5) are connected to a heating source and are used to heat the heating cavity (41).

10. The workpiece heating furnace according to claim 9, characterized in that: A main delivery pipe (6) is provided at the center of the furnace bottom (2), and a diverter (61) is provided at the top of the main delivery pipe (6); the heating nozzle (5) is connected to an auxiliary delivery pipe, and a plurality of auxiliary delivery pipes are connected to the diverter (61) located in the furnace bottom (2).

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