High-reliability heating wire resistant to high temperature of 1000 DEG C and production process thereof

Abstract

The invention belongs to the technical field of heating wires, and provides a high-reliability heating wire capable of resisting high temperature of 1000 DEG C. The production process comprises the following steps: processing and analyzing thickness data to obtain a thickness deviation coefficient value HD, and analyzing the number of abnormal thickness sub-regions and the thickness deviation coefficient value of the abnormal thickness sub-regions to obtain a thickness deviation coefficient value HD; obtaining a state evaluation value ZT of the coated metal wire, processing and analyzing the temperature data to obtain a temperature performance value WB, and processing and analyzing according to the positions of all abnormal thickness sub-regions on the surface of the metal wire and the number of regions with the same positions of all temperature abnormal sub-regions on the surface of the metal wire to obtain an influence value YX; according to the method, the coating thickness is analyzed by analyzing the coating thickness of the metal wire of the heating wire and judging whether the temperature is a factor influencing the coating thickness or not, so that the consistency of the coating thickness of the metal wire of the heating wire can be ensured, and the condition of non-uniform heating of the heating wire is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of heating wires, in particular to a 1000°C high-temperature resistant and highly reliable heating wire and a production process thereof. Background Art

[0002] With the continuous development of electronic technology, more and more electronic devices have strict requirements for temperature control. In some high-precision electronic instruments, communication equipment, computers and other equipment, too high or too low temperature will affect the performance and life of the equipment. Heating wires can be used for internal heating and temperature regulation of these electronic devices to ensure that the equipment works in a suitable temperature environment. Therefore, it is particularly important to produce a high-reliability heating wire that can withstand high temperatures of 1000℃.

[0003] A Chinese patent application with publication number CN106113431A discloses a far-infrared copper foil wire heating wire and its production process, including: a central wire, a metal wire spirally wound on the outside of the central wire, the metal wire is one or more layers, the outer side of the outermost metal wire is coated with an outer insulating skin, when the metal wire is multiple layers, an insulating structure is arranged between the metal wires; the outermost metal wire is a far-infrared heating wire, and the other metal wires are auxiliary heating wires; the far-infrared heating wire includes a bare metal wire, and the outer side of the bare metal wire is coated with a far-infrared coating; in the present invention, by arranging a far-infrared heating wire on the outside of the central wire, the copper foil wire has a far-infrared heating function, and the infrared effect of the heating wire can be effectively improved without affecting the diameter of the heating wire. The diameter of the heating wire is small, and the overall diameter is controlled within 0.8 mm. The texture is soft and it is not easy to produce a foreign body sensation. It is suitable for the heating wire to be used in multiple occasions.

[0004] However, the prior art lacks analysis of the coating thickness of the heating wire metal wire and lacks judgment on whether temperature is a factor affecting the coating thickness. Analysis of the coating thickness can ensure the consistency of the coating thickness of the heating wire metal wire and thus avoid uneven heating of the heating wire.

[0005] To this end, the present invention provides a 1000°C high-temperature resistant and highly reliable heating wire and a production process thereof. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a production process of a 1000°C high-temperature resistant and highly reliable heating wire, comprising: Step 1: Enamel the bare metal wire; Step 2: Apply the carbon black layer in the first 6 passes; Step 3: Apply the paint film layer in the last 6 passes; Wherein, the thickness data of different detection points in the surface sub-region of the coated metal wire are obtained, the thickness data including the thickness value, based on the processing and analysis of the thickness data, the thickness deviation coefficient value HD is obtained, and the surface sub-region of the coated metal wire is divided into an abnormal thickness sub-region and a normal thickness sub-region according to the thickness deviation coefficient value HD; Count the number of abnormal thickness sub-regions and obtain the thickness deviation coefficient value of the abnormal thickness sub-region, analyze the number of abnormal thickness sub-regions and the thickness deviation coefficient value of the abnormal thickness sub-region, and obtain the state evaluation value ZT of the coated metal wire, and determine whether the current coating of the metal wire is qualified according to the state evaluation value ZT of the coated metal wire, if qualified, proceed to step 4, if unqualified, proceed to step 5; Step 4: After the carbon black layer and the paint film layer are coated, they are baked in an oven at 1000-1200°C for 2-6 seconds and 4-12 seconds respectively to obtain a heating wire; Step 5: Obtain temperature data of different detection points in the metal wire surface sub-region during coating, the temperature data including the temperature value, process and analyze the temperature data to obtain the temperature performance value WB, mark the metal wire surface sub-region as the temperature abnormality sub-region and the temperature normal sub-region according to the temperature performance value WB, process and analyze the number of regions where the positions of all abnormal thickness sub-regions on the metal wire surface are the same as the positions of all temperature abnormal sub-regions on the metal wire surface to obtain the influence value YX, compare the influence value YX with the influence threshold, if the influence value YX is greater than or equal to the influence threshold, it means that the coating temperature abnormality is the cause of the unqualified metal wire thickness, if the influence value YX is less than the influence threshold, it means that the coating temperature abnormality is not the cause of the unqualified metal wire thickness.

[0008] As a further solution of the present invention: the thickness deviation coefficient value HD corresponding to the sub-region of the metal wire surface is obtained in the following manner: The ratio of the number of abnormal detection points to the average thickness deviation ratio corresponding to the abnormal detection points is processed by the formula: The thickness deviation coefficient value HD corresponding to the sub-region on the surface of the metal wire is calculated, where a1 and a2 are both preset proportional coefficients.

[0009] As a further solution of the present invention: the method of obtaining the abnormal detection point number ratio YS and the thickness deviation mean ratio YC corresponding to the abnormal detection points is: The surface area of ​​the coated metal wire is divided into a plurality of sub-areas of equal area, and the sub-areas represent the surface sub-areas of the coated metal wire, and a plurality of detection points are set in each surface sub-area of ​​the coated metal wire, and the number of detection points set in each surface sub-area is the same; Obtain the thickness value corresponding to each detection point in the sub-region of the surface of the coated metal wire, and compare the thickness value corresponding to each detection point in the sub-region of the surface of the coated metal wire with the thickness standard value: If the thickness value corresponding to the detection point is less than the thickness standard value, the detection point is marked as an abnormal detection point; If the thickness value corresponding to the detection point is greater than or equal to the thickness standard value, the detection point is marked as a normal detection point; Count the number of all detection points in the sub-region of the surface of the coated metal wire, mark them as the number of sub-detection points, count the number of abnormal detection points among all detection points in the sub-region of the surface of the coated metal wire, mark them as the number of sub-abnormal detection points, perform ratio processing on the number of sub-detection points and the number of sub-abnormal detection points, and obtain the ratio of the number of abnormal detection points YS; The thickness value corresponding to the abnormal detection point is subtracted from the thickness standard value to obtain the thickness deviation value corresponding to the abnormal detection point, the corresponding thickness deviation values ​​of all abnormal detection points are summed and averaged to obtain the thickness deviation mean of the abnormal detection point, and the thickness deviation mean of the abnormal detection point is ratioed with the thickness standard value to obtain the thickness deviation mean ratio YC corresponding to the abnormal detection point.

[0010] As a further solution of the present invention: the method of obtaining the marking result by marking the sub-region of the metal wire surface according to the thickness deviation coefficient value HD corresponding to the sub-region of the metal wire surface is as follows: Compare the thickness deviation coefficient value HD with the thickness deviation coefficient threshold: If the thickness deviation coefficient value HD is greater than or equal to the thickness deviation coefficient threshold, the corresponding metal wire surface sub-region is marked as an abnormal thickness sub-region; If the thickness deviation coefficient value HD is less than the thickness deviation coefficient threshold, the corresponding metal wire is marked as a normal thickness sub-area.

[0011] As a further solution of the present invention: the state evaluation value ZT of the coated metal wire is obtained as follows: The abnormal thickness sub-region number ratio YH and the thickness relative deviation value ratio HX corresponding to the abnormal thickness sub-region are processed by the formula: The state evaluation value ZT of the coated metal wire is calculated, wherein b1 and b2 are both preset proportional coefficients.

[0012] As a further solution of the present invention: the abnormal thickness sub-region number ratio YH and the thickness relative deviation value ratio HX corresponding to the abnormal thickness sub-region are obtained in the following manner: Count the number of abnormal thickness sub-regions, mark them as the number of abnormal thickness sub-regions, perform ratio processing on the number of abnormal thickness sub-regions and the number of sub-regions on the surface of the coated metal wire to obtain the ratio of the number of abnormal thickness sub-regions YH; Obtain the thickness deviation coefficient value of the abnormal thickness sub-area, mark it as the abnormal thickness deviation value, perform subtraction processing on the abnormal thickness deviation value and the thickness deviation coefficient threshold to obtain the thickness relative deviation value, sum and average the thickness relative deviation values ​​of all abnormal thickness sub-areas to obtain the thickness relative deviation mean, perform ratio processing on the thickness relative deviation mean and the thickness deviation coefficient threshold to obtain the thickness relative deviation value ratio HX corresponding to the abnormal thickness sub-area.

[0013] As a further solution of the present invention: the coating qualification of the metal wire is marked according to the state evaluation value ZT of the metal wire after coating, and the marking result is obtained in the following manner: Compare the state evaluation value ZT with the state evaluation threshold: If the state evaluation value ZT is greater than the state evaluation threshold, it means that the current coating of the metal wire is unqualified; If the state evaluation value ZT is less than or equal to the state evaluation threshold, it indicates that the current coating of the metal wire is qualified.

[0014] As a further solution of the present invention: the temperature performance value WB is obtained as follows: The number of abnormal temperature points (WS) and the mean temperature deviation ratio (WC) of the abnormal temperature points are processed by the formula: The temperature performance value WB is calculated.

[0015] As a further solution of the present invention: the number ratio WS of abnormal temperature points and the mean temperature deviation ratio WC of abnormal temperature points are obtained as follows: Acquire temperature data of different detection points in a sub-region of the surface of the metal wire during coating, the temperature data including the temperature value; Compare the temperature value to the required temperature value: If the temperature value is not equal to the required temperature value, the corresponding detection point is marked as an abnormal temperature point; If the temperature value is equal to the required temperature value, the corresponding detection point is marked as a normal temperature point; The number of abnormal temperature points is obtained, and the number of abnormal temperature points is ratioed to the number of all detection points in the sub-area of ​​the surface of the coated metal wire to obtain the number ratio WS of the abnormal temperature points; The temperature value corresponding to the abnormal temperature point is processed with the required temperature value to obtain the temperature deviation value corresponding to the abnormal temperature point. The temperature deviation values ​​corresponding to all abnormal temperature points are summed and averaged to obtain the temperature deviation mean. The temperature deviation mean is processed with the required temperature value to obtain the temperature deviation mean ratio WC.

[0016] As a further solution of the present invention: the method for obtaining the marking result by marking the sub-region of the metal wire surface according to the influence value YX is as follows: Compare the temperature performance value WB with the temperature performance threshold value; If the temperature performance value WB is greater than or equal to the temperature performance threshold, the metal wire surface sub-region is marked as a temperature abnormal sub-region; If the temperature performance value WB is less than the temperature performance threshold, the metal wire surface sub-region is marked as a normal temperature sub-region.

[0017] The beneficial effects of the present invention are as follows: 1. The present invention processes and analyzes the thickness data to obtain the thickness deviation coefficient value HD, analyzes the number of abnormal thickness sub-areas and the thickness deviation coefficient values ​​of the abnormal thickness sub-areas, obtains the state evaluation value ZT of the coated metal wire, and determines whether the current coating of the metal wire is qualified based on the state evaluation value ZT of the coated metal wire.

[0018] 2. The present invention processes and analyzes temperature data to obtain a temperature performance value WB, marks the metal wire surface sub-area as an abnormal temperature sub-area and a normal temperature sub-area according to the temperature performance value WB, processes and analyzes the number of areas where the positions of all abnormal thickness sub-areas on the metal wire surface are the same as the positions of all abnormal temperature sub-areas on the metal wire surface to obtain an influence value YX, and determines whether the coating temperature abnormality is the cause of the unqualified metal wire thickness based on the influence value YX. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a flowchart of the steps of a 1000°C high-temperature-resistant and highly reliable heating wire and its production process according to an embodiment of the present invention; Figure 2 It is a flow chart for obtaining the status evaluation value of a 1000° C. high-reliability heating wire and its production process according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Example 1

[0022] like Figure 1 The embodiment of the present invention shows a production process of a 1000° C. high-reliability heating wire, comprising: Step 1: Enamel the bare metal wire; Step 2: Apply the carbon black layer in the first 6 passes; Step 3: Apply the paint film layer in the last 6 passes; Wherein, the thickness data of different detection points in the surface sub-region of the coated metal wire are obtained, the thickness data including the thickness value, based on the processing and analysis of the thickness data, the thickness deviation coefficient value HD is obtained, and the surface sub-region of the coated metal wire is divided into an abnormal thickness sub-region and a normal thickness sub-region according to the thickness deviation coefficient value HD; Count the number of abnormal thickness sub-regions and obtain the thickness deviation coefficient value of the abnormal thickness sub-region, analyze the number of abnormal thickness sub-regions and the thickness deviation coefficient value of the abnormal thickness sub-region, and obtain the state evaluation value ZT of the coated metal wire, and determine whether the current coating of the metal wire is qualified according to the state evaluation value ZT of the coated metal wire, if qualified, proceed to step 4, if unqualified, proceed to step 5; Step 4: After the carbon black layer and the paint film layer are coated, they are baked in an oven at 1000-1200°C for 2-6 seconds and 4-12 seconds respectively to obtain a heating wire; Step 5: obtaining temperature data of different detection points in the metal wire surface sub-region during coating, the temperature data including the temperature value, processing and analyzing the temperature data to obtain the temperature performance value WB, marking the metal wire surface sub-region as the temperature abnormality sub-region and the temperature normal sub-region according to the temperature performance value WB, processing and analyzing the number of regions where the positions of all abnormal thickness sub-regions on the metal wire surface are the same as the positions of all temperature abnormal sub-regions on the metal wire surface to obtain the influence value YX, comparing the influence value YX with the influence threshold, if the influence value YX is greater than or equal to the influence threshold, it means that the coating temperature abnormality is the cause of the unqualified metal wire thickness, if the influence value YX is less than the influence threshold, it means that the coating temperature abnormality is not the cause of the unqualified metal wire thickness; Example 2

[0023] like Figure 2 The embodiment of the present invention shows a production process of a 1000° C. high-reliability heating wire, comprising: S1: Acquire thickness data of different detection points in the surface sub-region of the coated metal wire, the thickness data including thickness value, obtain thickness deviation coefficient value HD based on processing and analysis of the thickness data, and divide the surface sub-region of the coated metal wire into abnormal thickness sub-region and normal thickness sub-region according to the thickness deviation coefficient value HD; The surface area of ​​the coated metal wire is divided into a plurality of sub-areas of equal area, and the sub-areas represent the surface sub-areas of the coated metal wire, and a plurality of detection points are set in each surface sub-area of ​​the coated metal wire, and the number of detection points set in each surface sub-area is the same; Obtain the thickness value corresponding to each detection point in the sub-region of the surface of the coated metal wire, and compare the thickness value corresponding to each detection point in the sub-region of the surface of the coated metal wire with the thickness standard value: If the thickness value corresponding to the detection point is less than the thickness standard value, the detection point is marked as an abnormal detection point; If the thickness value corresponding to the detection point is greater than or equal to the thickness standard value, the detection point is marked as a normal detection point; It should be noted that the thickness value is obtained by using a thickness measuring instrument to perform thickness testing at each test point; Count the number of all detection points in the sub-region of the surface of the coated metal wire, mark them as the number of sub-detection points, count the number of abnormal detection points among all detection points in the sub-region of the surface of the coated metal wire, mark them as the number of sub-abnormal detection points, perform ratio processing on the number of sub-detection points and the number of sub-abnormal detection points, and obtain the ratio of the number of abnormal detection points YS; Subtract the thickness value corresponding to the abnormal detection point from the thickness standard value to obtain the thickness deviation value corresponding to the abnormal detection point, sum and average the corresponding thickness deviation values ​​of all abnormal detection points to obtain the thickness deviation mean value of the abnormal detection point, and perform ratio processing on the thickness deviation mean value of the abnormal detection point and the thickness standard value to obtain the thickness deviation mean ratio YC corresponding to the abnormal detection point; The ratio of the number of abnormal detection points to the average thickness deviation ratio corresponding to the abnormal detection points is processed by the formula: The thickness deviation coefficient value HD corresponding to the sub-region on the surface of the metal wire is calculated, where a1 and a2 are both preset proportional coefficients; Compare the thickness deviation coefficient value HD with the thickness deviation coefficient threshold: If the thickness deviation coefficient value HD is greater than or equal to the thickness deviation coefficient threshold, the corresponding metal wire surface sub-region is marked as an abnormal thickness sub-region; If the thickness deviation coefficient value HD is less than the thickness deviation coefficient threshold, the corresponding metal wire is marked as a normal thickness sub-area; S2: Count the number of abnormal thickness sub-regions and obtain the thickness deviation coefficient value of the abnormal thickness sub-region, analyze the number of abnormal thickness sub-regions and the thickness deviation coefficient value of the abnormal thickness sub-region, obtain the state evaluation value ZT of the coated metal wire, and determine whether the current coating of the metal wire is qualified according to the state evaluation value ZT of the coated metal wire; Count the number of abnormal thickness sub-regions, mark them as the number of abnormal thickness sub-regions, perform ratio processing on the number of abnormal thickness sub-regions and the number of sub-regions on the surface of the coated metal wire to obtain the ratio of the number of abnormal thickness sub-regions YH; Obtain the thickness deviation coefficient value of the abnormal thickness sub-region, mark it as the abnormal thickness deviation value, perform subtraction processing on the abnormal thickness deviation value and the thickness deviation coefficient threshold value to obtain the thickness relative deviation value, sum and average the thickness relative deviation values ​​of all abnormal thickness sub-regions to obtain the thickness relative deviation mean value, perform ratio processing on the thickness relative deviation mean value and the thickness deviation coefficient threshold value to obtain the thickness relative deviation value ratio HX corresponding to the abnormal thickness sub-region; The abnormal thickness sub-region number ratio YH and the thickness relative deviation value ratio HX corresponding to the abnormal thickness sub-region are processed by the formula: The state evaluation value ZT of the coated metal wire is calculated, wherein b1 and b2 are both preset proportional coefficients; Compare the state evaluation value ZT with the state evaluation threshold: If the state evaluation value ZT is greater than the state evaluation threshold, it means that the current coating of the metal wire is unqualified; If the state evaluation value ZT is less than or equal to the state evaluation threshold, it means that the current coating of the metal wire is qualified; S3: obtaining temperature data of different detection points in the metal wire surface sub-region during coating, the temperature data including the temperature value, processing and analyzing the temperature data to obtain a temperature performance value WB, marking the metal wire surface sub-region as a temperature abnormality sub-region and a temperature normal sub-region according to the temperature performance value WB, processing and analyzing the number of regions where all abnormal thickness sub-regions have the same positions as all temperature abnormal sub-regions on the metal wire surface to obtain an influence value YX, and judging whether the coating temperature abnormality is the cause of the unqualified metal wire thickness according to the influence value YX; Acquire temperature data of different detection points in a sub-region of the surface of the metal wire during coating, the temperature data including the temperature value; It should be noted that the temperature value is obtained by real-time detection of the temperature of different detection points by the temperature sensor installed on the surface of the spray gun. The temperature value represents the temperature of the sub-area of ​​the surface of the metal wire received from the spray gun during the coating process; Compare the temperature value to the required temperature value: If the temperature value is not equal to the required temperature value, the corresponding detection point is marked as an abnormal temperature point; If the temperature value is equal to the required temperature value, the corresponding detection point is marked as a normal temperature point; The number of abnormal temperature points is obtained, and the number of abnormal temperature points is ratioed to the number of all detection points in the sub-area of ​​the surface of the coated metal wire to obtain the number ratio WS of the abnormal temperature points; The temperature value corresponding to the abnormal temperature point is processed with the required temperature value to obtain the temperature deviation value corresponding to the abnormal temperature point. The temperature deviation values ​​corresponding to all abnormal temperature points are summed and averaged to obtain the temperature deviation mean value. The temperature deviation mean value is processed with the required temperature value to obtain the temperature deviation mean ratio WC. The number of abnormal temperature points (WS) and the mean temperature deviation ratio (WC) of the abnormal temperature points are processed by the formula: The temperature performance value WB is calculated; It should be noted that the temperature performance value WB can reflect the temperature stability of the spray gun when coating the surface of the metal wire during the metal wire coating process; Compare the temperature performance value WB with the temperature performance threshold value; If the temperature performance value WB is greater than or equal to the temperature performance threshold, the metal wire surface sub-region is marked as a temperature abnormal sub-region; If the temperature performance value WB is less than the temperature performance threshold, the metal wire surface sub-region is marked as a normal temperature sub-region; Count the number of regions where the positions of all abnormal thickness sub-regions on the metal wire surface are the same as the positions of all abnormal temperature sub-regions on the metal wire surface, mark them as overlapping sub-regions, and perform ratio processing on the number of overlapping sub-regions and the number of abnormal thickness sub-regions to obtain the influence value CH; It should be noted that the impact value YX represents the degree of overlap between the abnormal area of ​​thickness on the metal wire surface and the abnormal area of ​​coating temperature; Compare the influence value YX with the influence threshold: If the impact value YX is greater than or equal to the impact threshold, it means that the abnormal coating temperature is the cause of the unqualified wire thickness; If the impact value YX is less than the impact threshold, it means that the coating temperature abnormality is not the cause of the unqualified wire thickness; The technical solution of the embodiment of the present invention is: obtaining thickness data of different detection points in the surface sub-region of the coated metal wire, the thickness data including the thickness value, obtaining the thickness deviation coefficient value HD based on processing and analyzing the thickness data, analyzing the number of abnormal thickness sub-regions and the thickness deviation coefficient values ​​of the abnormal thickness sub-regions, obtaining the state evaluation value ZT of the coated metal wire, processing and analyzing the temperature data, obtaining the temperature performance value WB, marking the surface sub-region of the metal wire as the abnormal temperature sub-region and the normal temperature sub-region according to the temperature performance value WB, processing and analyzing the number of regions where the positions of all abnormal thickness sub-regions on the surface of the metal wire are the same as the positions of all abnormal temperature sub-regions on the surface of the metal wire, obtaining the influence value YX, judging whether the coating temperature abnormality is the cause of the unqualified thickness of the metal wire according to the influence value YX, the present invention analyzes the coating thickness of the heating wire metal wire, and judges whether the temperature is a factor affecting the coating thickness, and analyzes the coating thickness, so as to ensure the consistency of the coating thickness of the heating wire metal wire, thereby avoiding uneven heating of the heating wire. Example 3

[0024] The embodiment of the present invention provides a 1000° C. high-reliability heating wire, which is manufactured by the production process described in the above-mentioned embodiment 1 and embodiment 2.

[0025] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A production process for a 1000°C high-temperature resistant and highly reliable heating wire, characterized in that: include: Step 1: Enamel the bare metal wire; Step 2: Apply the carbon black layer in the first 6 passes; Step 3: Apply the paint film layer in the last 6 passes; Wherein, the thickness data of different detection points in the surface sub-region of the coated metal wire are obtained, the thickness data including the thickness value, based on the processing and analysis of the thickness data, the thickness deviation coefficient value HD is obtained, and the surface sub-region of the coated metal wire is divided into an abnormal thickness sub-region and a normal thickness sub-region according to the thickness deviation coefficient value HD; Count the number of abnormal thickness sub-regions and obtain the thickness deviation coefficient value of the abnormal thickness sub-region, analyze the number of abnormal thickness sub-regions and the thickness deviation coefficient value of the abnormal thickness sub-region, and obtain the state evaluation value ZT of the coated metal wire, and determine whether the current coating of the metal wire is qualified according to the state evaluation value ZT of the coated metal wire, if qualified, proceed to step 4, if unqualified, proceed to step 5; Step 4: After the carbon black layer and the paint film layer are coated, they are baked in an oven at 1000-1200°C for 2-6 seconds and 4-12 seconds respectively to obtain a heating wire; Step 5: Obtain temperature data of different detection points in the metal wire surface sub-region during coating, the temperature data including the temperature value, process and analyze the temperature data to obtain the temperature performance value WB, mark the metal wire surface sub-region as the temperature abnormality sub-region and the temperature normal sub-region according to the temperature performance value WB, process and analyze the number of regions where the positions of all abnormal thickness sub-regions on the metal wire surface are the same as the positions of all temperature abnormal sub-regions on the metal wire surface to obtain the influence value YX, compare the influence value YX with the influence threshold, if the influence value YX is greater than or equal to the influence threshold, it means that the coating temperature abnormality is the cause of the unqualified metal wire thickness, if the influence value YX is less than the influence threshold, it means that the coating temperature abnormality is not the cause of the unqualified metal wire thickness.

2. The production process of a 1000°C high-temperature resistant and highly reliable heating wire according to claim 1, characterized in that: The thickness deviation coefficient value HD corresponding to the sub-region of the metal wire surface is obtained as follows: The ratio of the number of abnormal detection points to the average thickness deviation ratio corresponding to the abnormal detection points is processed by the formula: The thickness deviation coefficient value HD corresponding to the sub-region on the surface of the metal wire is calculated, where a1 and a2 are both preset proportional coefficients.

3. The production process of a 1000°C high-temperature resistant and highly reliable heating wire according to claim 2, characterized in that: The method for obtaining the abnormal detection point number ratio YS and the thickness deviation mean ratio YC corresponding to the abnormal detection points is as follows: The surface area of ​​the coated metal wire is divided into a plurality of sub-areas of equal area, and the sub-areas represent the surface sub-areas of the coated metal wire, and a plurality of detection points are set in each surface sub-area of ​​the coated metal wire, and the number of detection points set in each surface sub-area is the same; Obtain the thickness value corresponding to each detection point in the sub-region of the surface of the coated metal wire, and compare the thickness value corresponding to each detection point in the sub-region of the surface of the coated metal wire with the thickness standard value: If the thickness value corresponding to the detection point is less than the thickness standard value, the detection point is marked as an abnormal detection point; If the thickness value corresponding to the detection point is greater than or equal to the thickness standard value, the detection point is marked as a normal detection point; Count the number of all detection points in the sub-region of the surface of the coated metal wire, mark them as the number of sub-detection points, count the number of abnormal detection points among all detection points in the sub-region of the surface of the coated metal wire, mark them as the number of sub-abnormal detection points, perform ratio processing on the number of sub-detection points and the number of sub-abnormal detection points, and obtain the ratio of the number of abnormal detection points YS; The thickness value corresponding to the abnormal detection point is subtracted from the thickness standard value to obtain the thickness deviation value corresponding to the abnormal detection point, the corresponding thickness deviation values ​​of all abnormal detection points are summed and averaged to obtain the thickness deviation mean of the abnormal detection point, and the thickness deviation mean of the abnormal detection point is ratioed with the thickness standard value to obtain the thickness deviation mean ratio YC corresponding to the abnormal detection point.

4. The production process of a 1000°C high-temperature resistant and highly reliable heating wire according to claim 2, characterized in that: The method for obtaining the marking result by marking the sub-region of the metal wire surface according to the thickness deviation coefficient value HD corresponding to the sub-region of the metal wire surface is as follows: Compare the thickness deviation coefficient value HD with the thickness deviation coefficient threshold: If the thickness deviation coefficient value HD is greater than or equal to the thickness deviation coefficient threshold, the corresponding metal wire surface sub-region is marked as an abnormal thickness sub-region; If the thickness deviation coefficient value HD is less than the thickness deviation coefficient threshold, the corresponding metal wire is marked as a normal thickness sub-area.

5. The production process of a 1000°C high-temperature resistant and highly reliable heating wire according to claim 1, characterized in that: The state evaluation value ZT of the coated metal wire is obtained as follows: The abnormal thickness sub-region number ratio YH and the thickness relative deviation value ratio HX corresponding to the abnormal thickness sub-region are processed by the formula: The state evaluation value ZT of the coated metal wire is calculated, wherein b1 and b2 are both preset proportional coefficients.

6. The production process of a 1000°C high-temperature resistant and highly reliable heating wire according to claim 5, characterized in that: The abnormal thickness sub-region number ratio YH and the thickness relative deviation value ratio HX corresponding to the abnormal thickness sub-region are obtained as follows: Count the number of abnormal thickness sub-regions, mark them as the number of abnormal thickness sub-regions, perform ratio processing on the number of abnormal thickness sub-regions and the number of sub-regions on the surface of the coated metal wire to obtain the ratio of the number of abnormal thickness sub-regions YH; Obtain the thickness deviation coefficient value of the abnormal thickness sub-area, mark it as the abnormal thickness deviation value, perform subtraction processing on the abnormal thickness deviation value and the thickness deviation coefficient threshold to obtain the thickness relative deviation value, sum and average the thickness relative deviation values ​​of all abnormal thickness sub-areas to obtain the thickness relative deviation mean, perform ratio processing on the thickness relative deviation mean and the thickness deviation coefficient threshold to obtain the thickness relative deviation value ratio HX corresponding to the abnormal thickness sub-area.

7. The production process of a 1000°C high-temperature resistant and highly reliable heating wire according to claim 5, characterized in that: The method of obtaining the marking result by marking the coating eligibility of the metal wire according to the state evaluation value ZT of the metal wire after coating is as follows: Compare the state evaluation value ZT with the state evaluation threshold: If the state evaluation value ZT is greater than the state evaluation threshold, it means that the current coating of the metal wire is unqualified; If the state evaluation value ZT is less than or equal to the state evaluation threshold, it indicates that the current coating of the metal wire is qualified.

8. The production process of a 1000°C high-temperature resistant and highly reliable heating wire according to claim 1, characterized in that: The temperature performance value WB is obtained as follows: The number of abnormal temperature points (WS) and the mean temperature deviation ratio (WC) of the abnormal temperature points are processed by the formula: The temperature performance value WB is calculated.

9. The production process of a 1000°C high-temperature resistant and highly reliable heating wire according to claim 8, characterized in that: The number ratio WS of abnormal temperature points and the mean temperature deviation ratio WC of abnormal temperature points are obtained as follows: Acquire temperature data of different detection points in a sub-region of the surface of the metal wire during coating, the temperature data including the temperature value; Compare the temperature value to the required temperature value: If the temperature value is not equal to the required temperature value, the corresponding detection point is marked as an abnormal temperature point; If the temperature value is equal to the required temperature value, the corresponding detection point is marked as a normal temperature point; The number of abnormal temperature points is obtained, and the number of abnormal temperature points is ratioed to the number of all detection points in the sub-area of ​​the surface of the coated metal wire to obtain the number ratio WS of the abnormal temperature points; The temperature value corresponding to the abnormal temperature point is processed with the required temperature value to obtain the temperature deviation value corresponding to the abnormal temperature point. The temperature deviation values ​​corresponding to all abnormal temperature points are summed and averaged to obtain the temperature deviation mean. The temperature deviation mean is processed with the required temperature value to obtain the temperature deviation mean ratio WC.

10. A 1000°C high temperature resistant and highly reliable heating wire, characterized in that: The high-reliability heating wire capable of withstanding high temperatures of 1000° C. is prepared by the production process described in any one of claims 1 to 9.

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