Large-tension annealing heat treatment method for etching material metal strip

Abstract

The invention relates to the technical field of metal strip heat treatment, in particular to a large-tension annealing heat treatment method for an etching material metal strip. Comprising the steps that (1) a metal strip annealing heat treatment device with a large-tension structure is arranged, the maximum tension S capable of being borne by a workpiece is calculated according to the material, thickness and width of the workpiece, and the pulling tension of the metal strip annealing heat treatment device to the workpiece is controlled to be smaller than the maximum tension S; (2) large-tension pulling is conducted on the workpiece through an unwinding tension roller structure and a winding tension roller structure of the metal strip annealing heat treatment device, so that internal stress left on the workpiece disappears; (3) large-tension pulling is carried out on the workpiece, namely, the workpiece is pulled forwards by a winding tension roller structure, and the workpiece is pulled backwards by an unwinding tension roller structure, so that the workpiece bears large tension; the large tension borne by a workpiece is adjusted by adjusting the output power of the unwinding tension roller structure and the output power of the winding tension roller structure. The method has the characteristics of good workpiece internal stress elimination effect, high flatness after heat treatment and the like.

Description

Technical Field

[0001] The invention relates to the technical field of metal heat treatment, in particular to a high tension annealing heat treatment method for an etching material metal strip. Background Art

[0002] At present, as a common metal raw material, the metal strip of etching material can be used to make PCB boards, dials of precision instruments, etching process processing of metal crafts, nameplate production, mold manufacturing, metal decoration carving, etc., depending on the metal material used. However, after the metal strip of etching material is fully stretched to obtain the required thickness, residual stress will exist inside the material, affecting the machinability of the material, so it is necessary to eliminate the residual stress in the metal strip of etching material by annealing.

[0003] In the prior art, the annealing treatment of the etched metal strip is to directly unfold the metal strip and then perform conventional heating and cooling heat treatment to eliminate the internal stress of the metal strip. With this conventional heating and cooling annealing treatment method, since the tension on the workpiece is small, it is necessary to rely on complex heating, cooling and flattening processes to complete the heat treatment process. Therefore, there are problems such as complex heat treatment process, poor effect of eliminating internal stress, and low flatness of the material after annealing.

[0004] After searching the Chinese patent announcements, no technical solution identical to “an improved high-tension annealing heat treatment method for etching metal strips” was found in the Chinese patent announcements, although the Chinese patent announcements also disclosed some technical solutions for heat treatment of metal strips, such as: the invention with application number 2020103062274, named “a rapid method for detecting the flatness of high-precision lead frame materials for etching”, the invention with application number 2019106054968, named “a copper strip heat treatment device and its use method” and the invention with application number 2019210872508, named “a copper strip heat treatment device and its use method”. The utility model patent with application number 2022214796613 and name “A turntable device for eliminating stress in automobile frame”, although the technical solution can solve the problem of conveying and eliminating stress of metal strips during heat treatment, and has certain technical effects, but due to the small tension on the workpiece during the heat treatment process, it is necessary to rely on complex heating, cooling and flattening processes to complete the heat treatment process. Therefore, there are still problems such as complex heat treatment process, poor effect of eliminating internal stress, and low flatness of materials after annealing. Therefore, it is necessary to provide an improved annealing heat treatment method for etching material metal strips to solve the problems of complex heat treatment process, poor effect of eliminating internal stress, and low flatness of materials after annealing in the prior art. Summary of the invention

[0005] The purpose of the present invention is to solve the problems of complex heat treatment process, poor internal stress elimination effect, low flatness of the material after annealing in the prior art, and to provide a high-tension annealing method for etching material metal strip, which has the characteristics and beneficial effects of simple heat treatment process, good internal stress elimination effect, high flatness of the material after annealing, etc.

[0006] In order to achieve the purpose of the present invention, the following technical solutions can be adopted: A high tension annealing heat treatment method for an etched metal strip, comprising the following technical contents: 1) A metal strip annealing heat treatment device with a large tension structure is set up, and the maximum tension S that the workpiece can withstand is calculated according to the material, thickness and width of the workpiece, and the pulling tension of the metal strip annealing heat treatment device on the workpiece is controlled to be less than or slightly less than the maximum tension S; 2) The workpiece is pulled with high tension by the unwinding tension roller structure and the winding tension roller structure of the metal strip annealing heat treatment device, so as to form a high tension internal stress on the workpiece and eliminate the internal stress remaining in the workpiece; 3) Pulling the workpiece under high tension means that the winding tension roller structure pulls the workpiece forward and the unwinding tension roller structure pulls the workpiece backward, so that the workpiece is subjected to high tension; the magnitude of the high tension borne by the workpiece is adjusted by adjusting the output power of the unwinding tension roller structure and the winding tension roller structure, so as to achieve the effect of eliminating the internal stress of the workpiece and smoothing the surface of the workpiece; the maximum tension is determined according to the material, width and thickness of the workpiece, and its expression is: maximum tension S=B*T*δ, B is the width of the workpiece, T is the thickness of the workpiece, and δ is the tensile strength of the workpiece.

[0007] In order to achieve the purpose of the present invention, the following technical solutions can also be adopted: Furthermore, the tension borne by the workpiece in point 1) is less than the maximum tension that the workpiece can withstand, which means that the workpiece withstands 50-85% of the maximum tension; the tension borne by the workpiece is slightly less than the maximum tension that the workpiece can withstand, which means that the workpiece withstands 85-95% of the maximum tension.

[0008] Furthermore, point 2) of pulling the workpiece with high tension means that during the annealing heat treatment process of the workpiece, the driving force parameters of the unwinding tension roller structure and the winding tension roller structure are adjusted to adjust the pulling tension of the workpiece in the annealing heat treatment unit so that the tension borne by the workpiece is within a set constant value range.

[0009] Furthermore, the driving force parameter adjustment refers to adjusting the output power of the servo motors arranged in the unwinding tension roller structure and the winding tension roller structure respectively, and measuring the speed and torque output by the servo motor in real time through the speed sensor and pressure sensor installed in the output shaft of the servo motor, and connecting the speed and torque to input into the control system. The control system outputs a control signal to the servo motor to control the speed and torque in the output shaft of the servo motor to be constant within a set range, thereby forming a closed-loop control structure.

[0010] Furthermore, the speed sensor and the pressure sensor are used to measure the rotation speed and torque output by the servo motor in real time, thereby determining the rotation speed N and the tension F of the tension roller in the unwinding tension roller structure and the winding tension roller structure, thereby determining the linear speed V = π* N * D of the tension roller in the unwinding tension roller structure and the winding tension roller structure, wherein: D is the diameter of the tension roller in the unwinding tension roller structure and the winding tension roller structure.

[0011] Furthermore, when adjusting the tension of the unwinding tension roller structure and the winding tension roller structure, the material, thickness and width of the workpiece are considered. The width of the workpiece is 500-1200 mm, the thickness of the workpiece is 0.08-0.5 mm, and the tensile strength δ is 60-100 Newtons / mm. 2 The maximum tension of the workpiece of material is: The workpiece has a thickness of 0.08 mm, a width of 500 mm, and a tensile strength of 60 N / mm. 2 When the maximum tension of the workpiece 10 is 2400 Newtons, the thickness of the workpiece is 0.09 mm, the width is 600 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 3240 Newtons, the thickness of the workpiece is 0.10 mm, the width is 700 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 4200 Newtons, the thickness of the workpiece is 0.15 mm, the width is 800 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 7200 Newtons, the thickness of the workpiece is 0.20 mm, the width is 900 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 10800 Newtons, the thickness of the workpiece is 0.25 mm, the width is 1000 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 15000 Newtons, the thickness of the workpiece is 0.30 mm, the width is 1100 mm, and the tensile strength is 60 Newtons / mm. 2When the maximum tension of the workpiece 10 is 19800 Newtons, the thickness of the workpiece is 0.35mm, the width is 1150mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 24150 Newtons, the thickness of the workpiece is 0.40 mm, the width is 1200 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 28800 Newtons, the thickness of the workpiece is 0.45 mm, the width is 1200 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 32400 Newtons, the thickness of the workpiece is 0.5 mm, the width is 1200 mm, and the tensile strength is 60 Newtons / mm. 2 When , the maximum tension of the workpiece 10 is 36000 Newtons.

[0012] Furthermore, the metal strip annealing heat treatment device includes an annealing heat treatment unit and an unwinding unit, an unwinding tension roller structure, and a winding tension roller structure and a winding unit at the outlet end of the annealing heat treatment unit; the workpiece is sent into the annealing heat treatment unit for annealing heat treatment through the unwinding unit and the unwinding tension roller structure, and the workpiece after annealing heat treatment enters the winding unit through the winding tension roller structure; by applying high tension to the workpiece, the flatness of the etched metal strip after annealing heat treatment is effectively improved, and the residual stress in the workpiece after stretching treatment can be evenly and fully released, thereby improving the quality of the workpiece and facilitating subsequent precision processing of the workpiece.

[0013] Furthermore, in order to improve the heating and cooling effects of the workpiece during the annealing heat treatment process, and to improve the temperature stability in the annealing heat treatment unit, a sealing roller structure is provided between the two ends of the annealing heat treatment unit and the unwinding tension roller structure and the winding tension roller structure. The sealing roller structure is used to ensure that the temperature in the annealing heat treatment unit remains stable while ensuring normal transmission of the workpiece, thereby ensuring normal annealing heat treatment of the workpiece.

[0014] Furthermore, before the workpiece enters the metal strip annealing heat treatment device for heat treatment, it is first cleaned and dried; after the workpiece completes the annealing heat treatment in the metal strip annealing heat treatment device, it is passivated and dried to improve the quality of the workpiece and facilitate subsequent precision processing of the workpiece.

[0015] Furthermore, the annealing heat treatment unit, the unwinding unit and the winding unit are arranged in an upper and lower double layer, the annealing heat treatment unit is placed on the top of the frame, and the unwinding unit and the winding unit are adjacently arranged on the bottom of the frame, forming an upper and lower double layer structure to reduce the footprint of the equipment.

[0016] The beneficial effects of the present invention are: 1. The present invention calculates the maximum tension S that the workpiece can withstand according to the material, thickness and width of the workpiece during annealing heat treatment, and controls the pulling tension of the metal strip annealing heat treatment device on the workpiece to be less than or slightly less than the maximum tension S; the workpiece is pulled with a large tension by the unwinding tension roller structure and the winding tension roller structure of the metal strip annealing heat treatment device, so that a large tension internal stress is formed on the workpiece, so that the internal stress remaining in the workpiece disappears; the workpiece is pulled forward by the winding tension roller structure and the workpiece is pulled backward by the unwinding tension roller structure, so that the workpiece is subjected to a large tension; the magnitude of the large tension borne by the workpiece is adjusted by adjusting the output power of the unwinding tension roller structure and the winding tension roller structure, so as to achieve the effect of eliminating the internal stress of the workpiece and smoothing the surface of the workpiece; therefore, the problems of the prior art such as complex heat treatment process, poor internal stress elimination effect, and low flatness of the material after annealing heat treatment can be solved, and the invention has the characteristics and beneficial effects of simple heat treatment process, good internal stress elimination effect, and high flatness of the material after annealing heat treatment.

[0017] 2. The present invention adjusts the driving force parameters of the unwinding tension roller structure and the winding tension roller structure according to the different materials, thicknesses and widths of the workpieces, so that the tension to which the workpiece is subjected is less than or slightly less than the maximum tension to which the workpiece can be subjected, and the maximum tension S=B*T*δ, where B is the width of the workpiece, T is the thickness of the workpiece, and δ is the tensile strength of the workpiece; therefore, the present invention has the characteristics and beneficial effects of accurate adjustment of large tension to the workpiece, convenient adjustment, good internal stress elimination effect, and higher flatness of the material after annealing heat treatment.

[0018] 3. The present invention sets tension roller structures at both ends of the etching material metal strip undergoing annealing heat treatment to apply a large tensile tension thereto, thereby effectively improving the flatness of the metal strip after annealing heat treatment and improving the quality of the metal strip; at the same time, the unwinding, annealing heat treatment and winding processes of the metal strip are set to be carried out on a double-layer structure device, which reduces the floor space of the equipment and allows the winding and unwinding positions of the metal strip to be adjacent to each other, which is convenient for operators to operate and improves processing efficiency.

[0019] 4. Since the present invention sets the equipment as a three-dimensional structure with upper and lower layers, the overall length of the equipment is greatly reduced, so the floor area can be reduced, and the specific characteristics and beneficial effects are small floor area, saving factory resources and saving investment.

[0020] 5. Since the unwinding unit and the rewinding unit are arranged adjacent to each other, the operators of the upper and lower reels can concentrate on one place to perform the unwinding and rewinding operations; therefore, the present invention has the characteristics and beneficial effects of convenient operation, saving manpower and time, and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of an annealing heat treatment device according to the present invention. DETAILED DESCRIPTION

[0022] Next, a specific embodiment 1 of the present invention will be described.

[0023] The high tension annealing heat treatment method for the etching material metal strip involved in this specific embodiment 1 specifically includes the following contents: 1) A metal strip annealing heat treatment device with a large tension structure is set up, and the maximum tension S that the workpiece can withstand is calculated according to the material, thickness and width of the workpiece, and the pulling tension of the metal strip annealing heat treatment device on the workpiece is controlled to be less than or slightly less than the maximum tension S; 2) The workpiece is pulled with high tension by the unwinding tension roller structure and the winding tension roller structure of the metal strip annealing heat treatment device, so as to form a high tension internal stress on the workpiece and eliminate the internal stress remaining in the workpiece; 3) Pulling the workpiece under high tension means that the winding tension roller structure pulls the workpiece forward and the unwinding tension roller structure pulls the workpiece backward, so that the workpiece is subjected to high tension; the magnitude of the high tension borne by the workpiece is adjusted by adjusting the output power of the unwinding tension roller structure and the winding tension roller structure, so as to achieve the effect of eliminating the internal stress of the workpiece and smoothing the surface of the workpiece; the maximum tension is determined according to the material, width and thickness of the workpiece, and its expression is: maximum tension S=B*T*δ, B is the width of the workpiece, T is the thickness of the workpiece, and δ is the tensile strength of the workpiece.

[0024] In this embodiment: Furthermore, the tension borne by the workpiece in point 1) is less than the maximum tension that the workpiece can withstand, which means that the workpiece withstands 50-85% of the maximum tension; the tension borne by the workpiece is slightly less than the maximum tension that the workpiece can withstand, which means that the workpiece withstands 85-95% of the maximum tension.

[0025] Furthermore, point 2) of pulling the workpiece with high tension means that during the annealing heat treatment process of the workpiece, the driving force parameters of the unwinding tension roller structure and the winding tension roller structure are adjusted to adjust the pulling tension of the workpiece in the annealing heat treatment unit so that the tension borne by the workpiece is within a set constant value range.

[0026] Furthermore, the driving force parameter adjustment refers to adjusting the output power of the servo motors arranged in the unwinding tension roller structure and the winding tension roller structure respectively, and measuring the speed and torque output by the servo motor in real time through the speed sensor and pressure sensor installed in the output shaft of the servo motor, and connecting the speed and torque to input into the control system. The control system outputs a control signal to the servo motor to control the speed and torque in the output shaft of the servo motor to be constant within a set range, thereby forming a closed-loop control structure.

[0027] Furthermore, the speed sensor and the pressure sensor are used to measure the rotation speed and torque output by the servo motor in real time, thereby determining the rotation speed N and the tension F of the tension roller in the unwinding tension roller structure and the winding tension roller structure, thereby determining the linear speed V = π* N * D of the tension roller in the unwinding tension roller structure and the winding tension roller structure, wherein: D is the diameter of the tension roller in the unwinding tension roller structure and the winding tension roller structure.

[0028] Furthermore, when adjusting the tension of the unwinding tension roller structure and the winding tension roller structure, the material, thickness and width of the workpiece are considered. The width of the workpiece is 500-1200 mm, the thickness of the workpiece is 0.08-0.5 mm, and the tensile strength δ is 60-100 Newtons / mm. 2 The maximum tension of the workpiece of material is: The workpiece has a thickness of 0.08 mm, a width of 500 mm, and a tensile strength of 60 N / mm. 2 When the maximum tension of the workpiece 10 is 2400 Newtons, the thickness of the workpiece is 0.09 mm, the width is 600 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 3240 Newtons, the thickness of the workpiece is 0.10 mm, the width is 700 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 4200 Newtons, the thickness of the workpiece is 0.15 mm, the width is 800 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 7200 Newtons, the thickness of the workpiece is 0.20 mm, the width is 900 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 10800 Newtons, the thickness of the workpiece is 0.25 mm, the width is 1000 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 15000 Newtons, the thickness of the workpiece is 0.30 mm, the width is 1100 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 19800 Newtons, the thickness of the workpiece is 0.35mm, the width is 1150mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 24150 Newtons, the thickness of the workpiece is 0.40 mm, the width is 1200 mm, and the tensile strength is 60 Newtons / mm. 2 When the maximum tension of the workpiece 10 is 28800 Newtons, the thickness of the workpiece is 0.45 mm, the width is 1200 mm, and the tensile strength is 60 Newtons / mm. 2When the maximum tension of the workpiece 10 is 32400 Newtons, the thickness of the workpiece is 0.5 mm, the width is 1200 mm, and the tensile strength is 60 Newtons / mm. 2 When , the maximum tension of the workpiece 10 is 36000 Newtons.

[0029] Furthermore, the metal strip annealing heat treatment device includes an annealing heat treatment unit and an unwinding unit, an unwinding tension roller structure, and a winding tension roller structure and a winding unit at the outlet end of the annealing heat treatment unit; the workpiece is sent into the annealing heat treatment unit for annealing heat treatment through the unwinding unit and the unwinding tension roller structure, and the workpiece after annealing heat treatment enters the winding unit through the winding tension roller structure; by applying high tension to the workpiece, the flatness of the etched metal strip after annealing heat treatment is effectively improved, and the residual stress in the workpiece after stretching treatment can be evenly and fully released, thereby improving the quality of the workpiece and facilitating subsequent precision processing of the workpiece.

[0030] Further, refer to Figure 1The annealing heat treatment device of the present invention comprises an unwinding unit 2, an annealing heat treatment unit 4 and a winding unit 5, and comprises a frame 1, an unwinding tension roller structure 31 and a winding tension roller structure 32. The unwinding unit 2 and the winding unit 5 are adjacently arranged on the bottom surface of the frame 1, and the unwinding tension roller structure 31, the annealing heat treatment unit 4 and the winding tension roller structure 32 are arranged on the frame 1 to form a three-dimensional double-layer structure to reduce the overall footprint of the equipment; a first guide roller structure 11 is provided between the unwinding unit 2 and the unwinding tension roller structure 31, and a first guide roller structure 12 is provided between the winding unit 5 and the winding tension roller structure 32. There is a second guide roller structure 12 to form a steering structure for the workpiece 10 to move between the upper and lower layers of the frame 1; the unwinding tension roller structure 31 is located at the inlet end of the annealing heat treatment unit 4, and the winding tension roller structure 32 is located at the outlet end of the annealing heat treatment unit 4; the unwinding tension roller structure 31 and the winding tension roller structure 32 each have an adjustable high-tension pulling structure, and the two cooperate to form a high-tension pulling structure for the workpiece during the heat treatment process, and the internal stress of the workpiece is eliminated by pulling the workpiece 10 with high tension; the unwinding unit 2 and the winding unit 5 are arranged adjacent to each other to facilitate operation, save manpower and improve efficiency. A first sealing roller structure 41 is provided near the inlet end of the annealing heat treatment unit 4, and a second sealing roller structure 42 is provided near the outlet end of the annealing heat treatment unit 4. The annealing heat treatment unit, the unwinding unit and the winding unit are arranged in an upper and lower double layer, the annealing heat treatment unit is placed on the top of the frame, and the unwinding unit and the winding unit are arranged adjacent to each other on the bottom of the frame, forming an upper and lower double layer structure to reduce the footprint of the equipment. In order to improve the heating and cooling effect of the workpiece during the annealing heat treatment process, and to improve the temperature stability in the annealing heat treatment unit, a sealing roller structure is provided between the two ends of the annealing heat treatment unit and the unwinding tension roller structure and the winding tension roller structure. The sealing roller structure is used to ensure that the temperature in the annealing heat treatment unit is kept stable while ensuring the normal transmission of the workpiece, thereby ensuring the normal annealing heat treatment of the workpiece.

[0031] This embodiment applies a large tension to the workpiece 10 (etching material metal strip) to pull and tug. On the one hand, it can evenly and fully release the residual stress in the workpiece 10 (etching material metal strip) after the stretching treatment. On the other hand, it can effectively improve the flatness of the workpiece 10 (etching material metal strip) after the annealing heat treatment, thereby improving the quality of the workpiece 10 (etching material metal strip) and facilitating the subsequent precision processing of the workpiece 10 (etching material metal strip).

[0032] Since the workpiece 10 (etching material metal strip) needs to be heated and cooled during the annealing heat treatment process, in order to improve the temperature stability in the annealing heat treatment unit 4, a first sealing roller structure 41 (unwinding tension roller structure) is provided at the inlet end of the annealing heat treatment unit 4, and a second sealing roller structure 42 (winding tension roller structure) is provided at the outlet end. The use of the sealing roller structure can ensure that the workpiece 10 (etching material metal strip) is normally transported while keeping the temperature in the annealing heat treatment unit 4 stable, thereby ensuring normal annealing heat treatment of the workpiece 10 (etching material metal strip).

[0033] By arranging the annealing heat treatment unit 4, the unwinding unit 2 and the winding unit 5 in an upper and lower double layer, the annealing heat treatment unit 4 is placed on the frame 1, and the unwinding unit 2 and the winding unit 5 are adjacently arranged on the bottom surface of the frame 1, forming an upper and lower double layer structure to reduce the footprint of the equipment.

[0034] In this embodiment, the annealing heat treatment unit 4, the unwinding unit 2 and the winding unit 5 are arranged in a double layer up and down, the annealing heat treatment unit 4 is placed in the upper layer, and the unwinding unit 2 and the winding unit 5 are arranged adjacently in the lower layer. After the workpiece 10 (etching material metal strip) is unwound from the unwinding unit in the lower layer, it enters the annealing heat treatment unit 4 in the upper layer for annealing heat treatment and then returns to the winding unit 5 in the lower layer. By arranging the annealing heat treatment unit 4 in the upper layer, and the unwinding unit 2 and the winding unit 5, which are the starting point and the end point of the annealing heat treatment process, are arranged adjacently in the lower layer, the overall length of the annealing heat treatment device can be greatly reduced, and the floor space of the equipment can be reduced. At the same time, the starting point and the end point of the processing process are close to each other, which is convenient for the operator to perform the upper and lower winding operations, and is convenient for transferring the rolled workpiece 10 (etching material metal strip) to be annealed and after the annealing heat treatment, thereby improving the efficiency of the annealing heat treatment.

[0035] The annealing heat treatment unit 4 can adopt the annealing heat treatment furnace structure of conventional technology, the unwinding unit 2 can adopt the unwinding structure of conventional technology, the winding unit 5 can adopt the winding structure of conventional technology, the first sealing roller structure 41 and the second sealing roller structure 42 can adopt the sealing roller structure of conventional technology, the cleaning and drying unit 6 can adopt the cleaning and drying device of conventional technology, the passivation and drying unit 7 can adopt the passivation and drying device of conventional technology, the welding unit 8 can adopt the welding structure of conventional technology, the clamping and cutting unit 9 can adopt the clamping and cutting structure of conventional technology, the first guide roller structure 11 and the second guide roller structure 12 can adopt the guide roller structure of conventional technology, the control system can adopt the PLC control system of conventional technology, the unwinding tension roller structure 31 and the winding tension roller structure 32 can adopt the secondary or above tension roller structure of conventional technology.

[0036] The workpiece 10 (etching material metal strip) suitable for processing in this embodiment can be a copper strip, a steel strip, a stainless steel strip, an alloy strip or other metal strips.

[0037] Other specific embodiments of the present invention are described below: In other embodiments of the present invention, the workpiece can be cleaned and dried before entering the metal strip annealing heat treatment device for heat treatment; the workpiece can be passivated and dried after completing the annealing heat treatment in the metal strip annealing heat treatment device to improve the quality of the workpiece and facilitate subsequent precision processing of the workpiece.

[0038] Specifically, on the basis of the specific embodiment 1, a welding unit 8 is provided near the outlet end of the unwinding unit 2, and a pinching and cutting unit 9 is provided near the inlet end of the unwinding unit 2. A cleaning and drying unit 6 is provided between the welding unit 8 and the first guide roller structure 11, and a passivation and drying unit 7 is provided between the cutting unit 9 and the second guide roller structure 12.

[0039] Before entering the annealing heat treatment unit 4 , the workpiece 10 (the metal strip of the etching material) is first cleaned and dried; after completing the annealing heat treatment in the annealing heat treatment unit 4 , the workpiece 10 (the metal strip of the etching material) is passivated and dried.

[0040] The workpiece 10 (etching material metal strip) after the stretching process is unwound by the unwinding unit 2 so that the workpiece 10 (etching material metal strip) passes through the annealing heat treatment unit 4 and the tension roller units at both ends and then is rolled into a roll by the winding unit 5 .

[0041] Before entering the annealing heat treatment unit 4, the workpiece 10 (etching material metal strip) is first cleaned and dried; after the workpiece 10 (etching material metal strip) completes the annealing heat treatment in the annealing heat treatment unit, it is passivated and dried. After the stretching treatment, the surface of the workpiece 10 (etching material metal strip) will have residual stretching liquid, which can be cleaned by cleaning and drying to avoid the stretching liquid from affecting the annealing heat treatment process; and after the annealing heat treatment, the passivation treatment of the workpiece 10 (etching material metal strip) is achieved by coating the surface of the workpiece 10 (etching material metal strip) with passivation liquid and drying it, so as to avoid the surface of the workpiece 10 (etching material metal strip) from being oxidized during storage, and effectively protect the workpiece 10 (etching material metal strip).

[0042] The workpiece 10 suitable for processing in the present invention may be a common metal strip or an etched metal strip, and the common metal strip or the etched metal strip may be a copper strip, a steel strip, a stainless steel strip, an alloy strip or other metal strips.

[0043] The above are only preferred embodiments of the present invention, and are not intended to limit the scope of use of the present invention. Therefore, any equivalent changes made to the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high tension annealing heat treatment method for etching material metal strip, characterized in that: 1) A metal strip annealing heat treatment device with a large tension structure is set up, and the maximum tension S that the workpiece can withstand is calculated according to the material, thickness and width of the workpiece, and the pulling tension of the metal strip annealing heat treatment device on the workpiece is controlled to be less than or slightly less than the maximum tension S; 2) The workpiece is pulled with high tension by the unwinding tension roller structure and the winding tension roller structure of the metal strip annealing heat treatment device, so as to form a high tension internal stress on the workpiece and eliminate the internal stress remaining in the workpiece; 3) Pulling the workpiece under high tension means that the winding tension roller structure pulls the workpiece forward and the unwinding tension roller structure pulls the workpiece backward, so that the workpiece is subjected to high tension; the magnitude of the high tension borne by the workpiece is adjusted by adjusting the output power of the unwinding tension roller structure and the winding tension roller structure, so as to achieve the effect of eliminating the internal stress of the workpiece and smoothing the surface of the workpiece; the maximum tension is determined according to the material, width and thickness of the workpiece, and its expression is: maximum tension S=B*T*δ, B is the width of the workpiece, T is the thickness of the workpiece, and δ is the tensile strength of the workpiece.

2. A high tension annealing heat treatment method for an etched metal strip according to claim 1, characterized in that: The tension that the workpiece bears in point 1) is less than the maximum tension that the workpiece can withstand, which means that it bears 50-85% of the maximum tension; the tension that the workpiece bears is slightly less than the maximum tension that the workpiece can withstand, which means that it bears 85-95% of the maximum tension.

3. The high tension annealing heat treatment method for an etched metal strip according to claim 1, characterized in that: Point 2) pulling the workpiece with high tension means that during the annealing heat treatment process of the workpiece, the driving force parameters of the unwinding tension roller structure and the winding tension roller structure are adjusted to adjust the pulling tension of the workpiece in the annealing heat treatment unit so that the tension borne by the workpiece is within the set constant value range.

4. A high tension annealing heat treatment method for an etched metal strip according to claim 3, characterized in that: The driving force parameter adjustment refers to adjusting the output power of the servo motors arranged in the unwinding tension roller structure and the winding tension roller structure respectively, and measuring the speed and torque output by the servo motor in real time through the speed sensor and pressure sensor installed in the output shaft of the servo motor, and connecting the speed and torque to input into the control system. The control system outputs a control signal to the servo motor to control the speed and torque in the output shaft of the servo motor to be constant within the set range, thereby forming a closed-loop control structure.

5. A high tension annealing heat treatment method for an etched metal strip according to claim 4, characterized in that: The speed sensor and the pressure sensor are used to measure the rotation speed and torque output by the servo motor in real time, thereby determining the rotation speed N and the tension F of the tension roller in the unwinding tension roller structure and the winding tension roller structure, thereby determining the linear speed V = π* N * D of the tension roller in the unwinding tension roller structure and the winding tension roller structure, wherein: D is the diameter of the tension roller in the unwinding tension roller structure and the winding tension roller structure.

6. A high tension annealing heat treatment method for an etched metal strip according to claim 3, characterized in that: When adjusting the tension of the unwinding tension roller structure and the winding tension roller structure, the material, thickness and width of the workpiece are considered. The width of the workpiece is 500-1200mm, the thickness of the workpiece is 0.08-0.5mm, and the tensile strength δ is 60-100 Newtons / mm 2 The maximum tension that the workpiece of the material can withstand is: 2400-36000 Newtons.

7. The high tension annealing heat treatment method for etching material metal strip according to claim 1, characterized in that: The metal strip annealing heat treatment device includes an annealing heat treatment unit, an unwinding unit and an unwinding tension roller structure arranged at the inlet end of the annealing heat treatment unit, and a winding tension roller structure and a winding unit at the outlet end; the workpiece is sent into the annealing heat treatment unit through the unwinding unit and the unwinding tension roller structure for annealing heat treatment, and the workpiece after annealing heat treatment enters the winding unit through the winding tension roller structure.

8. A high tension annealing heat treatment method for etching material metal strip according to claim 7, characterized in that: In order to improve the heating and cooling effects of the workpiece during the annealing heat treatment process, and to improve the temperature stability in the annealing heat treatment unit, a sealing roller structure is provided between the two ends of the annealing heat treatment unit and the unwinding tension roller structure and the winding tension roller structure. The sealing roller structure can ensure that the temperature in the annealing heat treatment unit remains stable while ensuring the normal transmission of the workpiece, thereby ensuring normal annealing heat treatment of the workpiece.

9. The high tension annealing heat treatment method for etching material metal strip according to claim 1, characterized in that: Before the workpiece enters the metal strip annealing heat treatment device for heat treatment, it is first cleaned and dried; after the workpiece completes the annealing heat treatment in the metal strip annealing heat treatment device, it is passivated and dried.

10. The high tension annealing heat treatment method for etching material metal strip according to claim 7, characterized in that: The annealing heat treatment unit, the unwinding unit and the winding unit are arranged in an upper and lower double layer. The annealing heat treatment unit is placed on the top of the frame, and the unwinding unit and the winding unit are adjacently arranged on the bottom of the frame, forming an upper and lower double layer structure to reduce the footprint of the equipment.

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