A metal heat treatment production line applied to threaded steel

Abstract

The application provides a metal heat treatment production line applied to threaded steel, which comprises a pretreatment module, a heat treatment module and a post-treatment module. The pretreatment module is used for rust removal operation on the threaded steel, placing the threaded steel after rust removal into a tank body, and filling the tank body with powder. The heat treatment module is used for receiving the tank body after the tank body is filled with powder, and performing heat treatment on the threaded steel in the tank body by heating the tank body. The post-treatment module is used for surface slag removal on the threaded steel after heat treatment, and packaging the threaded steel after surface slag removal. A heat control unit is arranged in the heat treatment module. The heating control unit monitors the power consumption of the heat treatment module in real time, calculates the actual heat production according to the power consumption, calculates the theoretical heat production based on the parameters of the tank body, the powder and the threaded steel, compares the difference between the actual heat production and the theoretical heat production, and judges whether the heat treatment module is abnormal. The application has the beneficial effect that the threaded steel processing equipment is connected in an automatic mode, and the work efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of metal processing, and in particular relates to a metal heat treatment production line for rebar. Background Technology

[0002] To improve the corrosion resistance of rebar, extend its service life in harsh environments such as humidity, acid and alkali, or salt spray, and enhance structural stability and safety, rebar is currently required to undergo surface coating treatment before use. Coating can prevent hydrogen embrittlement and stress corrosion cracking, meet the stringent material performance requirements of high-durability projects, and can impart specific functional or aesthetic effects to rebar as needed. It is widely used in marine engineering, underground structures, and long-life infrastructure.

[0003] To achieve the multi-element alloy co-diffusion function of rebar, surface coating heat treatment is required. In the existing technology, the surface treatment of rebar mostly relies on manual operation or scattered, non-integrated equipment combinations, which has problems such as poor connection between the various links of handling, rust removal, coating, heat treatment, pickling and packaging, low efficiency and large quality fluctuations. Summary of the Invention

[0004] In view of this, the present invention aims to provide a metal heat treatment production line for rebar, in order to solve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A metal heat treatment production line for rebar, comprising:

[0007] The pretreatment module is used to remove rust from the rebar, placing the rust-removed rebar into the tank and filling the tank with powder.

[0008] The heat treatment module is used to receive the tank after it has been filled with powder and to heat treat the threaded steel inside the tank by heating the tank.

[0009] The post-processing module is used to remove slag from the surface of the heat-treated rebar and to package the rebar after slag removal.

[0010] The heat control unit, located within the heat treatment module, is used to monitor the actual heat generation of the heat treatment module in real time, calculate the theoretical heat generation, compare the difference between the actual heat generation and the theoretical heat generation, and determine whether the heat treatment module has malfunctioned.

[0011] The pre-processing module, heat treatment module, and post-processing module are all connected to the host computer and interact with each other through the host computer.

[0012] Furthermore, the pre-processing module monitors the position of the threaded steel bar, the position of the tank, and the working status of the filling device used to fill the tank with powder in real time, and sequentially starts the rust removal, handling, and filling actions.

[0013] Furthermore, the preprocessing module's workflow includes:

[0014] The current position of the threaded steel bar and the tank is detected by a position sensor or photoelectric switch, and the threaded steel bar and the tank are moved according to the current position. After the movement is completed, it is detected whether the threaded steel bar and the tank are in place.

[0015] If not in place, check the current position of the threaded steel bar and the tank, and move the threaded steel bar and the tank according to the current position; otherwise, confirm whether the working status of the filling device is normal.

[0016] If the working status is normal, notify the filling device to start the filling action. After the filling action is completed, move the tank from the pre-treatment module to the temporary storage position and notify the heat treatment module; otherwise, notify the staff and stop the operation of the pre-treatment module.

[0017] Furthermore, the post-processing module monitors the position and temperature of the rebar in real time, as well as the status of the cleaning device used for surface slag removal, and initiates the hoisting, slag removal, and packaging actions in sequence.

[0018] Furthermore, the post-processing module's workflow includes:

[0019] The post-processing module detects the temperature of the rebar after heat treatment using a temperature sensor and determines whether the temperature of the rebar meets the cleaning requirements.

[0020] If the requirements are not met, the heat treatment module is notified to suspend the processing of the next batch of rebar, and the current batch of rebar is sent to the heat treatment module to be heated until the cleaning requirements are met.

[0021] Otherwise, the cleaning device is notified to prepare to receive the rebar, and the heat treatment module is notified to start processing the next batch of rebar. The current position of the rebar is detected by the position sensor, and the hoisting device is notified to hoist the rebar from its current position to the cleaning device.

[0022] Furthermore, the post-processing module's operation also includes:

[0023] The post-processing module detects the temperature of the rebar inside the cleaning device using a temperature sensor, and determines whether the surface slag removal of the rebar is complete based on the temperature of the rebar.

[0024] If the temperature of the rebar is more than twice the temperature of the cleaning fluid in the cleaning device, the surface deslagging work is not completed and the surface deslagging work should continue.

[0025] Otherwise, once the surface slag removal is completed, the current position of the rebar is detected by the position sensor, and the hoisting device is notified to hoist the rebar from its current position to the packaging device.

[0026] Furthermore, the working process of the heat treatment module includes:

[0027] The heat treatment module performs corresponding operations based on the notifications sent by the post-processing module.

[0028] If the post-processing module sends a pause notification, the transport vehicle is notified to go to the post-processing module to receive the rebar that does not meet the cleaning requirements and load the rebar into the tank for heating; if the post-processing module sends a start notification, it is determined whether a notification from the pre-processing module has been received.

[0029] If no notification is received, wait for notification; otherwise, notify the transport vehicle to proceed to the temporary storage location to receive the tank, move the tank into the heat treatment module, and perform the heat treatment operation.

[0030] Furthermore, the calculation process for the theoretical heat generation of the heat treatment module is as follows:

[0031] Q 源理论 =Q 罐体 +Q 工件 +Q 石英砂 +Q 损耗 ;

[0032] Among them, Q 罐体 Q is the theoretical heat absorbed by the tank. 工件 Q represents the theoretical heat absorption of the workpiece. 石英砂 Q is the theoretical heat absorption of quartz sand. 损耗 Heat loss includes the heat absorbed by the furnace and the heat lost.

[0033] Furthermore, the calculation process for the theoretical heat absorption of the tank, workpiece, and quartz sand is as follows:

[0034] ;

[0035] Where c is the specific heat capacity of substance x, representing the amount of heat required to raise the temperature of a unit mass of substance x by 1℃, m is the mass of substance x, t is the final temperature of x after heat absorption, t0 is the initial temperature of x, and x is any one of the following: tank, workpiece, or quartz sand.

[0036] Furthermore, the calculation process for the actual heat generation of the heat treatment module is as follows:

[0037] ;

[0038] Where P is the heat source power and t is time. For conversion efficiency.

[0039] Compared with the prior art, the metal heat treatment production line for rebar described in this invention has the following advantages:

[0040] By connecting various threaded steel processing equipment in series through automation, work efficiency is improved. The modular design facilitates subsequent production line expansion or process modification, increases the utilization rate of factory space and powder materials, reduces the labor intensity of workers, and eliminates the transportation costs in the original decentralized processing process. Attached Figure Description

[0041] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0042] Figure 1 This is a schematic diagram of the overall structure of the rebar processing production line according to an embodiment of the present invention;

[0043] Figure 2 As described in the embodiments of the present invention Figure 1 Enlarged schematic diagram of the local structure at points marked 1, 2, and 4 in the attached figure;

[0044] Figure 3 As described in the embodiments of the present invention Figure 1 Enlarged schematic diagram of the local structure marked 5 and 6 in the attached figure;

[0045] Figure 4 As described in the embodiments of the present invention Figure 1 The attached diagram shows an enlarged view of the local structure marked with 3 symbols.

[0046] Figure 5 As described in the embodiments of the present invention Figure 1 The attached diagram shows an enlarged view of the local structure marked 7.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Unit tank; 2. Furnace body; 3. Rust removal device; 4. Filling device; 5. Cleaning device; 6. Packaging device; 7. Placement area. Detailed Implementation

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0050] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0053] like Figures 1 to 5 As shown: A metal heat treatment production line for rebar, comprising:

[0054] The pretreatment module is used to remove rust from the rebar, placing the rust-removed rebar into the tank and filling the tank with powder.

[0055] The heat treatment module is used to receive the tank after it has been filled with powder and to heat treat the threaded steel inside the tank by heating the tank.

[0056] The post-processing module is used to remove slag from the surface of the heat-treated rebar and to package the rebar after slag removal.

[0057] The heat control unit, located within the heat treatment module, is used to monitor the actual heat generation of the heat treatment module in real time, calculate the theoretical heat generation, compare the difference between the actual heat generation and the theoretical heat generation, and determine whether the heat treatment module has malfunctioned.

[0058] The pre-processing module, heat treatment module, and post-processing module are all connected to the host computer and interact with each other through the host computer.

[0059] In some embodiments, the preprocessing module, heat treatment module, and postprocessing module each have a built-in corresponding clock control unit. The clock control units in the preprocessing module, heat treatment module, and postprocessing module are all connected to the host computer and interact with data through the host computer.

[0060] The cycle control unit is used to control the working cycle of the corresponding module. The working cycle is the working sequence of each device in each module, as well as the working sequence between modules.

[0061] The host computer interacts with the cycle control unit and sensors through a communication interface. The host computer is either a SCADA system or an industrial control computer (IPC).

[0062] The working cycle data exchanged between the cycle control unit and the host computer includes:

[0063] Status information:

[0064] The module displays the current process progress (start / in progress / completed), cycle time status (cycle time, waiting time, timeout information), and equipment operating status (running, standby, fault).

[0065] Process parameters:

[0066] The set values ​​and measured values ​​of temperature, time, atmosphere pressure, etc. during heat treatment, as well as the speed, position parameters, and detection signals of pre- and post-treatment processes.

[0067] Instructions and feedback:

[0068] Commands issued by the host computer to start / stop / reset / switch process modes, and execution confirmation signals fed back by the cycle control unit.

[0069] The host computer uses the working cycle data of each module to ensure that the rhythm of pre-processing, heat treatment and post-processing are matched, avoiding workpiece accumulation or idling. By adjusting the cycle settings of each module, the overall efficiency of the production line is improved.

[0070] In some embodiments, each module of the production line includes the following devices:

[0071] The pretreatment module is equipped with a rust removal device 3 and a filling device 4. The rust removal device 3 is used to remove rust from the rebar, and the filling device 4 is used to put the rust-removed rebar into a tank composed of multiple unit tanks 1 and fill the tank with powder, preferably quartz sand.

[0072] The heat treatment module is equipped with a furnace body 2 for heat treatment of rebar;

[0073] The post-processing module is equipped with a cleaning device 5 and a packaging device 6. The cleaning device 5 is used to remove slag from the surface of the heat-treated rebar, and the packaging device 6 is used to package the slag-removed rebar.

[0074] In some embodiments, the production line further includes two placement areas 7, which are respectively located at the inlet end and the outlet end of the production line. The placement area 7 at the inlet end is used to place the rebar to be processed, and the placement area 7 at the outlet end is used to place the processed rebar.

[0075] Workers unload the rebar to be processed from the transport truck and place it in the placement area 7 at the entrance. Then, some rebar is loaded from the placement area 7 at the entrance and placed into the rust removal device 3 for rust removal. The packaged rebar is then placed in the placement area 7 at the exit.

[0076] The cycle control unit of the pretreatment module monitors the position of the threaded steel, the position of the tank, and the status of the filling device 4 for filling powder in real time, and sequentially starts the rust removal, handling, and filling actions.

[0077] The process of comparing the actual heat output with the theoretical heat output to determine whether furnace body 2 has experienced an abnormality is as follows:

[0078] Before starting the heating furnace, the available data include the weight of the workpiece, quartz sand, and tank, the initial temperature, and the target temperature. At this point, the total heat absorption can be calculated. The heat loss is estimated based on factors such as the structure and insulation of the furnace body 2 (in this embodiment, it is estimated as 5% of the total heat absorption, and this value will be adjusted later based on the heat loss during the use of the furnace body 2).

[0079] In the calculation of actual heat production and theoretical heat production, heat production = heat absorption + loss. Since the heat absorption cannot be consistent every time the furnace is started, the total heat absorption will inevitably be inconsistent each time due to the different loading amount and temperature. The temperature inside the furnace will also be inconsistent. Therefore, the judgment basis does not use an accurate value. In this embodiment, the heat absorption is estimated at ±8%. This estimated value will be adjusted according to the loss of the furnace body 2 structure during use.

[0080] If the value is lower or higher than this range, the parameter settings or the infrared thermometer needs to be checked or calibrated. Specifically, under the same conditions, if the value is higher than the judgment range, it indicates that the heat absorption has increased, which is judged as inaccurate temperature measurement or poor heat preservation and heating effects; if the value is lower than the judgment range, it indicates that the heat absorption has decreased, which is judged as inaccurate temperature measurement.

[0081] The preprocessing module's workflow includes:

[0082] The current position of the threaded steel bar and the tank is detected by a position sensor or photoelectric switch, and the threaded steel bar and the tank are moved according to the current position. After the movement is completed, it is detected whether the threaded steel bar and the tank are in place.

[0083] If not in place, check the current position of the threaded steel bar and the tank, and move the threaded steel bar and the tank according to the current position; otherwise, confirm whether the working status of the filling device 4 is normal.

[0084] If the working status is normal, the cycle control unit of the pretreatment module notifies the filling device 4 to start the filling action. After the filling action is completed, the tank is moved from the pretreatment module to the temporary storage position and the heat treatment module is notified; otherwise, the staff is notified and the operation of the pretreatment module is stopped.

[0085] In some embodiments, the timing control unit of the preprocessing module controls the devices within the preprocessing module to perform the following operations:

[0086] The pretreatment module's cycle control unit arranges the rebar in a batch one by one, and then notifies the transport vehicle to transport the arranged rebar to the rust removal device 3 to perform the rust removal operation. Subsequently, it notifies the rust removal device 3 to start.

[0087] After the rust removal operation is completed, the rebar is hoisted into the tank assembly position of the filling device 4. In the tank assembly position, multiple unit tanks 1 are combined into a tank body, and the rebar is placed in the tank body. The tank body is assembled by the tank assembly car of the filling device 4. There are multiple tank assembly cars, each corresponding to one unit tank 1. Two adjacent tank assembly cars move towards each other to combine two corresponding unit tanks 1.

[0088] After the current processing action is completed, the cycle control unit of the pre-processing module outputs a "pre-processing complete" signal and sends it to the cycle control unit of the heat treatment module. At the same time, it triggers the conveying equipment to push the filled tank to the next station. When the tank leaves the pre-processing module, the cycle control unit of the pre-processing module controls each device in the pre-processing module to return to its original position and resets the monitoring data to prepare for the processing of the next batch of rebar.

[0089] When assembling the tank body, two unit tanks 1 are installed on two tank assemblies respectively. The clamping plates on the tank assemblies clamp the open end of the unit tank 1, and the other end of the unit tank 1 is inserted into the positioning barrel. The two tank assemblies move towards each other, and the threaded steel is inserted into the inside of the unit tank 1. The open ends of the two unit tanks 1 are connected to each other to form the tank body.

[0090] When adding powder, the tanker truck moves to the designated position and adds the powder raw material into the tank. Then, the tanker truck moves to the tank-joining position, and the tank is moved to the buffer component by the second lifting component. When disassembling the tank, the positioning bucket of the tanker truck aligns with the tank, the two tanker trucks move towards each other, the arc-shaped clamping plate clamps one end of the opening of unit tank 1, after the tank's latch is opened, the two tanker trucks move in opposite directions, the rebar comes out from the two unit tanks 1, and the tanker truck returns to the tank-joining position.

[0091] The post-processing module's operation includes:

[0092] The post-processing module detects the temperature of the rebar after heat treatment using a temperature sensor and determines whether the temperature of the rebar meets the cleaning requirements.

[0093] If the requirements are not met, the heat treatment module is notified to suspend the processing of the next batch of rebar, and the current batch of rebar is sent to the heat treatment module to be heated until the cleaning requirements are met.

[0094] Otherwise, the cleaning device 5 is notified to prepare to receive the rebar, and the heat treatment module is notified to start processing the next batch of rebar. The current position of the rebar is detected by the position sensor, and the hoisting device is notified to hoist the rebar from its current position to the cleaning device 5.

[0095] The post-processing module's operation also includes:

[0096] The post-processing module detects the temperature of the threaded steel in the cleaning device 5 through a temperature sensor, and determines whether the surface slag removal work of the threaded steel is completed based on the temperature of the threaded steel.

[0097] If the temperature of the rebar is more than twice the temperature of the cleaning fluid in the cleaning device 5, the surface deslagging work is not completed and the surface deslagging work continues.

[0098] Otherwise, once the surface slag removal is completed, the current position of the rebar is detected by the position sensor, and the hoisting device is notified to hoist the rebar from its current position to the packaging device 6.

[0099] The working process of the heat treatment module includes:

[0100] The heat treatment module performs corresponding operations based on the notifications sent by the post-processing module.

[0101] If the post-processing module sends a pause notification, the transport vehicle is notified to go to the post-processing module to receive the rebar that does not meet the cleaning requirements and load the rebar into the tank for heating; if the post-processing module sends a start notification, it is determined whether a notification from the pre-processing module has been received.

[0102] If no notification is received, wait for notification; otherwise, notify the transport vehicle to proceed to the temporary storage location to receive the tank, move the tank into the heat treatment module, and perform the heat treatment operation.

[0103] The calculation process for the theoretical heat generation of the heat treatment module is as follows:

[0104] Q 源理论 =Q 罐体 +Q 工件 +Q 石英砂 +Q 损耗 ;

[0105] Among them, Q 罐体 Q is the theoretical heat absorbed by the tank. 工件 Q represents the theoretical heat absorption of the workpiece. 石英砂 Q is the theoretical heat absorption of quartz sand. 损耗 Heat loss includes the heat absorbed by the furnace and the heat lost.

[0106] The calculation process for the theoretical heat absorption of the tank, workpiece, and quartz sand is as follows:

[0107] ;

[0108] Where c is the specific heat capacity of substance x, representing the amount of heat required to raise the temperature of a unit mass of substance x by 1℃, m is the mass of substance x, t is the final temperature of x after heat absorption, t0 is the initial temperature of x, and x is any one of the following: tank, workpiece, or quartz sand.

[0109] The calculation process for the actual heat generation of the heat treatment module is as follows:

[0110] ;

[0111] Where P is the heat source power and t is time. The conversion efficiency is specifically 93%.

[0112] In some embodiments, the relationship and architecture between the heat treatment module, the pre-processing module, and the post-processing module are as follows:

[0113] The main components of each module are:

[0114] Upper-level monitoring layer: consists of upper-level system, HMI human-machine interface, database server, etc.

[0115] Control layer: mainly composed of various PLCs (Programmable Logic Controllers).

[0116] Equipment layer: frequency converters, sensors, actuators, etc.

[0117] Communication networks: Industrial Ethernet, fieldbus.

[0118] The core hardware devices for each module and their selection / configuration are as follows:

[0119] PLC system: Select one of the following three PLCs: Siemens S7-1500 series 1511-1, S7-1200 series 1215C, or S7-200SMART series SR40.

[0120] Heat treatment module: The heating method has been changed from the original resistance heating to medium frequency heating. The control of the heat treatment module has also been changed from the original power regulator to a medium frequency heating control system. Analog control or communication control can be selected. In this embodiment, Modbus RTU fieldbus control is selected. Compared with analog control, this control method is simpler to wire and can transmit more data.

[0121] Based on theoretical heat absorption calculations, the workpiece absorbs approximately 51% of the total heat, the tank and quartz sand absorb approximately 44% of the total heat (calculated based on the weight of the tank, the amount of workpiece, and the amount of quartz sand), and the heat lost is approximately 5% of the total heat. The heat generated by the heat source = total heat absorbed + heat lost = heat absorbed by the workpiece + heat absorbed by the quartz sand + heat absorbed by the tank + heat lost.

[0122] According to the mechanical design structure, in this embodiment, the thermal efficiency of medium frequency heating can reach more than 90%, while the thermal efficiency of resistance band heating is only 80%. The energy consumption and heating speed of medium frequency heating are both better than those of resistance band heating.

[0123] Human-Machine Interface: In this embodiment, Kunlun Tongtai touch screen is used as the on-site HMI hardware.

[0124] Sensors and actuators: Resistance heating heats the entire furnace chamber, resulting in uniform temperature. Temperature can be measured using thermocouples. Medium-frequency heating, on the other hand, involves a coil directly heating the tank. The tank temperature is higher than the furnace temperature. In this case, the temperature measured by thermocouples in the furnace chamber deviates significantly from the actual temperature of the tank. Therefore, infrared measurement is used to directly measure the tank temperature.

[0125] The power acquisition PLCSR40 communicates with the multi-functional power meter via fieldbus (MODBUS protocol) to transmit the real-time data of the power meter corresponding to each device to the area PLC1511-1. After the upper system collects the data from 1511-1, it first saves the data to the SQL Server database and then counts the power consumption according to the device and area.

[0126] The heating furnace calculates its theoretical power consumption based on parameters such as the weight, specific heat, initial temperature, actual measured temperature, and losses of the workpiece, quartz sand, and tank. Specifically, it is based on the law of conservation of energy: the heat generated by the heat source = the heat absorbed by the workpiece + the heat absorbed by the quartz sand + the heat absorbed by the tank + losses (including the heat absorbed by the furnace and the heat lost). This algorithm has too large a deviation when used as a basis for judging the process progress, but it is perfectly adequate as a basis for judging whether the equipment or the process is abnormal. Compared with relying on human inspection of the sealing condition of the furnace body 2, this algorithm can directly judge the occurrence of abnormal conditions through power metering.

[0127] Among them, the functions of process cycle, power statistics, data interaction, and data recording are completed by the PLC (1151-1 or 1215C) of each area, while the stand-alone functions of other equipment are completed by the corresponding SR40.

[0128] Process cycle control: The cycle time of each process on the production line is controlled by the PLC (1151-1 or 1215C) of each area, and communicates with the SR40 of each process via industrial Ethernet.

[0129] Electricity consumption statistics: Energy consumption costs account for a large proportion of the cost of zinc plating. By monitoring, recording and analyzing the electricity consumption of each process and equipment in real time and obtaining the results, we can use the results as a basis for judging whether the equipment is abnormal or whether the equipment process is abnormal. At the same time, it is also the basis for cost accounting.

[0130] Data recording: Key data of the process need to be retained for a long time, such as zinc addition amount, process temperature, zinc diffusion process time, furnace loading amount, etc.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

[0132] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A metal heat treatment production line applied to threaded steel, characterized in that, The application relates to a metal heat treatment production line applied to threaded steel, which comprises the following parts: a pretreatment module for carrying out a rust removal operation on threaded steel, placing the rust-removed threaded steel into a tank body, and filling quartz sand into the tank body; a heat treatment module for receiving the tank body filled with the quartz sand and carrying out heat treatment on the threaded steel in the tank body by heating the tank body; a post-treatment module for carrying out surface slag removal on the heat-treated threaded steel and packaging the threaded steel after the surface slag removal; a heat control unit arranged in the heat treatment module, which is used for monitoring the actual heat production of the heat treatment module in real time, calculating a theoretical heat production, comparing the difference between the actual heat production and the theoretical heat production, and judging whether the heat treatment module is abnormal; the pretreatment module, the heat treatment module and the post-treatment module are connected with an upper computer and carry out data interaction through the upper computer; the calculation process of the theoretical heat production of the heat treatment module is as follows: Q 源理论 =Q 罐体 +Q 工件 +Q 石英砂 +Q 损耗 ; Among them, Q 罐体 Q is the theoretical heat absorbed by the tank. 工件 Q represents the theoretical heat absorption of the workpiece. 石英砂 Q is the theoretical heat absorption of quartz sand. 损耗 Heat loss includes the heat absorbed by the furnace and the heat lost. the calculation process of the theoretical heat absorption of the tank body, the workpiece and the quartz sand is as follows: Q 吸 = c x m(t t0); wherein c is the specific heat capacity of the material x, m is the mass of the material x, t is the final temperature of x after heat absorption, t0 is the initial temperature of x, and x is any one of the tank body, the workpiece and the quartz sand; the calculation process of the actual heat production of the heat treatment module is as follows: Q 源实际 = P x t x ; where P is the heat source power, t is time, is the conversion efficiency.

2. The metal heat treatment production line applied to threaded steel according to claim 1, characterized in that: the pretreatment module monitors the positions of the threaded steel and the tank body, the working state of a filling device used for filling the quartz sand into the tank body in real time, and sequentially starts the rust removal, carrying and filling actions.

3. A metal heat treatment line for threaded steel according to claim 2, characterized in that, the working process of the pretreatment module comprises: detecting the current positions of the threaded steel and the tank body through a position sensor, moving the threaded steel and the tank body according to the current positions, detecting whether the threaded steel and the tank body are in place after the movement, detecting the current positions of the threaded steel and the tank body again if the threaded steel and the tank body are not in place, and confirming whether the working state of the filling device is normal; if the working state is normal, the filling device is informed to start the filling action, the tank body is moved from the pretreatment module to a temporary storage position after the filling action is completed, and the heat treatment module is informed; otherwise, the workers are informed and the working of the pretreatment module is stopped.

4. The metal heat treatment production line applied to threaded steel according to claim 1, characterized in that: the post-treatment module monitors the positions of the threaded steel, the temperature of the threaded steel and the state of a cleaning device used for surface slag removal in real time, and sequentially starts the hoisting, slag removal and packaging actions. the working process of the post-treatment module comprises:

5. A metal heat treatment line for threaded steel according to claim 4, characterized in that, the post-treatment module detects the temperature of the heat-treated threaded steel through a temperature sensor, and judges whether the temperature of the threaded steel meets the cleaning requirement; if the temperature of the threaded steel does not meet the cleaning requirement, the heat treatment module is informed to pause the treatment of the next batch of threaded steel, and the current batch of threaded steel is sent into the heat treatment module to be heated to meet the cleaning requirement; otherwise, the cleaning device is informed to be ready to receive the threaded steel, the heat treatment module is informed to start the treatment of the next batch of threaded steel, the current position of the threaded steel is detected through a position sensor, and the hoisting device is informed to hoist the threaded steel from the current position to the cleaning device. the working process of the post-treatment module further comprises:

6. The metal heat treatment production line for threaded steel according to claim 4, characterized in that, ​ The post-processing module detects the temperature of the threaded steel in the cleaning device through the temperature sensor, and judges whether the surface slag removal work of the threaded steel is completed according to the temperature of the threaded steel; If the temperature of the threaded steel is higher than twice the temperature of the cleaning liquid in the cleaning device, the surface slag removal work is not completed, and the surface slag removal work is continued; Otherwise, the surface slag removal work is completed, the current position of the threaded steel is detected through the position sensor, and the hoisting device is notified to hoist the threaded steel from the current position to the packaging device.

7. The metal heat treatment production line for threaded steel according to claim 1, characterized in that, The working process of the heat treatment module includes: The heat treatment module executes the corresponding operation according to the notification sent by the post-processing module; If the notification sent by the post-processing module is to pause, the transport vehicle is notified to go to the post-processing module to receive the threaded steel that does not meet the cleaning requirements, and the threaded steel is loaded into the tank for heating; if the notification sent by the post-processing module is to start, it is judged whether the notification of the pre-processing module is received; If no notification is received, wait for notification; otherwise, notify the transport vehicle to go to the temporary storage position to receive the tank, move the tank to the heat treatment module, and execute the heat treatment operation.

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