A processing technology suitable for high-precision scraper profile wire

Abstract

The present invention discloses a processing technology suitable for high-precision scraper profile wire, belonging to the technical field of metal processing. The process first peels the steel wire after rough drawing to remove surface defects of the steel wire; then performs annealing to eliminate stress, laying the foundation for subsequent drawing to obtain high-strength steel wire and regular steel wire; then undergoes fine drawing and cold deformation, and then rolls to form, and then performs induction heat treatment after trimming. The rolling and trimming can further improve the strength of the steel wire, and the cross-sectional shape and size of the steel wire are similar to those of the finished product. The induction heat treatment can make the structure of the steel wire stable and consistent, significantly improve the strength and hardness, and enhance the toughness and thermal stability; then, online polishing is performed to remove the heat treatment oxide film on the surface of the steel wire, making the surface of the steel wire bright; and then fine trimming is performed to fine-tune the cross-sectional shape and size, improve the forming accuracy of the steel wire, and obtain a finished steel wire with high precision, high strength, high hardness, good toughness, consistent shape, bright surface, not easy to rust, and convenient for subsequent processing and use.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal processing, and specifically relates to a processing technology suitable for high-precision scraper profiled wire, and is particularly suitable for processing high-precision profiled wire represented by SWRH72A, 82B, and 65Mn. Background Art

[0002] Combined oil rings consist of upper and lower scrapers and lining springs that generate radial and axial elastic forces. The scrapers have the following characteristics: they are very thin, exerting a high specific pressure on the cylinder wall and providing strong oil scraping; they are independent and adaptable to the cylinder; and they are lightweight and have a large oil return path. Therefore, scrapers are widely used in oil rings and are a key component. The effectiveness of scrapers depends on factors such as the mechanical properties, dimensional accuracy, cross-sectional shape consistency, and surface quality of the shaped wire used to make them. Currently, there are three common methods for processing scraper wire. The first method involves slitting the steel strip using a slitting machine, then trimming the strip using a trimming machine before using it directly. Due to the relatively poor shape, size, and performance of the steel wire produced by this method, it has been gradually phased out. The second processing method is to use spring steel wire directly after rolling and then use it as scraper profiled wire. This situation is mainly used on low-end products. Some products with higher requirements will use the formed material for subsequent oil quenching heat treatment and polishing before using it as scraper profiled wire. Due to the influence of the rough forming method and polishing, the accuracy of this processing method is not very high, the consistency of the cross-sectional shape is also difficult to fully guarantee, and the winding stability is not good. The third processing method is that for some materials with higher requirements, the rough formed steel wire needs to be drawn with a die first, then oil quenched and heat treated, and then polished before use. The third forming processing method causes the size of the processed steel wire material to change gradually at the head and tail due to die wear, and it is also easy to scratch the die and cause the die to be scrapped. The overall cost is high, and the linearity of some asymmetric scraper materials is not easy to control. In addition, the size and shape of the heat-treated material will deteriorate after polishing, affecting subsequent use. To sum up, in view of the shortcomings of the above-mentioned existing technologies, it is urgently necessary to design a processing technology that can produce high-precision scraper special-shaped wire with high precision, high strength, high hardness, good toughness, consistent shape, bright surface, not easy to rust, and easy for subsequent processing and use. Summary of the Invention

[0003] The present invention addresses the shortcomings of the prior art and provides a process for producing high-precision scraper blade profiled wire. The profiled wire produced using the process of the present invention has the advantages of high precision, high strength, high hardness, good toughness, uniform shape, bright surface, low rust resistance, and ease of subsequent processing and use. Furthermore, the process has the advantages of high production efficiency, low production cost, no oil smoke, and environmental friendliness.

[0004] The purpose of the present invention can be achieved by the following technical measures:

[0005] A processing technology suitable for high-precision scraper profile wire of the present invention is achieved by the following steps:

[0006] A. Rough drawing: The coated wire rod is unfolded by the pay-off device and is roughly drawn through the inner cavity of several rough round dies to obtain regular steel wire;

[0007] B. Peeling: After rough drawing, the steel wire is passed through a cutting die to remove 5 to 10 rough surfaces with defects on one side to obtain a steel wire without defects on the surface;

[0008] C. Annealing: The peeled steel wire moves forward at a linear speed of 5-8 m / s and passes through the annealing heating furnace and annealing water cooling pipe for annealing. After passing through the annealing heating furnace, the wire temperature of the steel wire is heated to 720-750°C. After passing through the annealing water cooling pipe, the wire temperature of the steel wire is controlled to 10-30°C. After annealing, the steel wire structure is stable and the work hardening has been eliminated, which is conducive to subsequent processing.

[0009] D. Fine drawing: The annealed steel wire is finely drawn through the inner cavity of several fine round dies to obtain a regular round steel wire;

[0010] E. Rolling: The round steel wire after fine drawing continues to move forward and is rolled through several sets of upper and lower rollers in the rolling mill to obtain flat steel wire;

[0011] F. Trimming: The flat steel wire obtained after rolling continues to move forward and passes through the left and right shaping blocks and the upper and lower flattening blocks in sequence to trim the cross section of the steel wire. After trimming, a nearly finished steel wire that basically meets the cross-sectional shape and size requirements is obtained; the left and right shaping blocks are two symmetrical shaping blocks fixed on the same track sliding block, and after being buckled together, they form a width trimming cavity with a shape and size similar to the cross section of the finished steel wire in the width direction; the upper and lower flattening blocks are two symmetrical flattening blocks fixed on the same track sliding block, and after being buckled together, they form a thickness trimming cavity with a shape and size similar to the cross section of the finished steel wire in the thickness direction;

[0012] G. Induction heat treatment: The trimmed nearly finished steel wire continues to move forward and passes through high-frequency induction heating tube I, high-speed water cooling tube I, high-frequency induction heating tube II, and high-speed water cooling tube II in sequence for induction heat treatment. After passing through high-frequency induction heating tube I, the wire temperature of the nearly finished steel wire is heated to 870-950°C and kept warm for 6-10 seconds. After passing through high-speed water cooling tube I, the wire temperature of the nearly finished steel wire is cooled to room temperature. After passing through high-frequency induction heating tube II, the wire temperature of the nearly finished steel wire is heated to 380-440°C. After passing through high-speed water cooling tube II, the wire temperature of the nearly finished steel wire is cooled to room temperature.

[0013] H. Online Polishing: The nearly finished steel wire after induction heat treatment is polished online in sequence by symmetrically arranged left and right resin polishing wheels and symmetrically arranged upper and lower resin polishing wheels in the polishing device to remove the oxide layer on the surface of the nearly finished steel wire, making the surface of the nearly finished steel wire smooth and clean; the working surfaces of the left and right resin polishing wheels and the upper and lower resin polishing wheels are at an angle of 10 to 20 degrees with the moving direction of the steel wire;

[0014] I. Finishing: The polished, nearly finished steel wire continues to move forward and passes through the left and right finishing shaping blocks and the upper and lower finishing flattening blocks in sequence for cross-section finishing. After finishing, a finished steel wire that fully meets the cross-sectional shape and size requirements is obtained. The left and right finishing shaping blocks are two symmetrical shaping blocks fixed on the same track sliding block, and after being buckled together, they form a width trimming cavity that matches the shape and size of the cross-sectional width direction of the finished steel wire. The upper and lower finishing flattening blocks are two symmetrical flattening blocks fixed on the same track sliding block, and after being buckled together, they form a thickness trimming cavity that matches the shape and size of the cross-sectional thickness direction of the finished steel wire.

[0015] J. Traction and Rewinding: The finished steel wire obtained after fine trimming is wound onto the take-up drum of the take-up machine under the traction of the traction device;

[0016] K. Inspection and warehousing: Inspect the finished steel wire. The qualified finished steel wire shall be packaged and stored if it meets the requirements of tensile strength of 1700MPa or above, hardness of 480-560Hv1.0, dimensional tolerance of ±0.005mm, uniform cross-sectional shape, clean and smooth surface without scratches.

[0017] The design principles of the present invention are as follows:

[0018] The process of the present invention is to first peel the steel wire after rough drawing to remove surface defects of the steel wire. After the peeling treatment, the surface defects of the steel wire are greatly improved; then the stress is eliminated by annealing, laying the foundation for subsequent drawing to obtain high-strength steel wire and regular steel wire; then the steel wire is rolled into shape after fine drawing and cold deformation, and then induction heat treatment is performed after trimming. Rolling and trimming can further improve the strength of the steel wire, and the cross-sectional shape and size of the steel wire are similar to those of the finished product. Induction heat treatment can make the structure of the steel wire stable and consistent, greatly improve the strength and hardness, and enhance the toughness and thermal stability; then the heat treatment oxide film on the surface of the steel wire is removed by online polishing to make the surface of the steel wire bright; then fine trimming is performed to fine-tune the cross-sectional shape and size, improve the forming accuracy of the steel wire, and obtain the desired steel wire product. At the same time, because the process of the present invention uses water quenching, it is also smoke-free and green and environmentally friendly. Due to the reasonable design of the process of the present invention, it also has the characteristics of high production efficiency and low production cost.

[0019] The beneficial technical effects of the present invention are as follows:

[0020] The special-shaped wire produced by the processing technology of the present invention has the advantages of high precision, high strength, high hardness, good toughness, consistent shape, bright surface, not easy to rust, easy to follow up processing and use, etc., and also has the characteristics of high production efficiency, low production cost, no oil smoke, and green environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a process flow chart of the present invention.

[0022] Figure 2 It is a schematic cross-sectional view of the finished product of the special-shaped wire in Example 1.

[0023] Figure 3 It is a schematic cross-sectional view of the finished product of the special-shaped wire in Example 2.

[0024] Figure 4 It is a schematic cross-sectional view of the finished product of the special-shaped wire in Example 3.

[0025] Explanation of the part numbers in the figure: 1. Pay-off device, 2. Coarse round die, 3. Cutting die, 4. Annealing heating furnace, 5. Annealing water cooling pipe, 6. Fine round die, 7. Rolling mill, 8. Left and right shaping blocks, 9. Upper and lower flattening blocks, 10. High-frequency induction heating tube I, 11. High-speed water cooling tube I, 12. High-frequency induction heating tube II, 13. High-speed water cooling tube II, 14. Polishing device, 14-1. Left and right resin polishing wheels, 14-2. Upper and lower resin polishing wheels, 15. Left and right fine-tuning shaping blocks, 16. Upper and lower fine-tuning flattening blocks, 17. Traction device, 18. Take-up machine. DETAILED DESCRIPTION

[0026] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0027] Example 1

[0028] A processing technology suitable for high-precision scraper profile wire in embodiment 1 is achieved by the following steps:

[0029] A. Rough drawing: The coated material is SWRH72A, the wire rod with a diameter of 5.50 mm is unfolded by the wire-laying device (1), and is roughly drawn through the inner cavity of several rough round dies (2) to obtain a regular steel wire with a diameter of 3.00 mm;

[0030] B. Stripping: After rough drawing, the steel wire with a diameter of 3.00 mm is passed through a cutting die (3) to remove the rough surface of 8 wires with defects on one side, thereby obtaining a steel wire with a diameter of 2.84 mm and no surface defects;

[0031] C. Annealing treatment: After peeling, the steel wire with a diameter of 2.84 mm is moved forward at a linear speed of 6 m / s and sequentially passes through the annealing heating furnace (4) and the annealing water cooling pipe (5) for annealing treatment; after passing through the annealing heating furnace (4), the wire temperature of the steel wire is heated to 735°C, and after passing through the annealing water cooling pipe (5), the wire temperature of the steel wire is controlled to 10-20°C. After annealing treatment, the steel wire structure is stable and the work hardening has been eliminated, which is conducive to subsequent processing;

[0032] D. Fine drawing: The annealed steel wire is finely drawn through the inner cavity of several fine round dies (6) to obtain a regular round steel wire with a diameter of 1.40 mm;

[0033] E. Rolling: The round steel wire after fine drawing continues to move forward and is rolled through several sets of upper and lower rollers in the rolling mill (7) to obtain a flat steel wire of 0.52*2.35mm;

[0034] F. Trimming: The flat steel wire obtained after rolling continues to move forward and passes through the left and right shaping blocks (8) and the upper and lower flattening blocks (9) in sequence to trim the cross section of the steel wire. After trimming, a nearly finished steel wire that basically meets the cross-sectional shape and size requirements is obtained - the cross-sectional size is 0.48*2.26mm; the left and right shaping blocks (8) are two symmetrical shaping blocks fixed on the same track sliding block, and after being buckled left and right, they form a width trimming cavity with a shape and size similar to the width direction of the cross section of the finished steel wire; the upper and lower flattening blocks (9) are two symmetrical flattening blocks fixed on the same track sliding block, and after being buckled up and down, they form a thickness trimming cavity with a shape and size similar to the thickness direction of the cross section of the finished steel wire;

[0035] G. Induction heat treatment: the trimmed nearly finished steel wire continues to move forward and passes through the high-frequency induction heating tube I (10), high-speed water cooling tube I (11), high-frequency induction heating tube II (12), and high-speed water cooling tube II (13) in sequence for induction heat treatment. After passing through the high-frequency induction heating tube I (10), the wire temperature of the nearly finished steel wire is heated to 870°C and kept warm for 8 seconds. After passing through the high-speed water cooling tube I (11), the wire temperature of the nearly finished steel wire is cooled to room temperature. After passing through the high-frequency induction heating tube II (12), the wire temperature of the nearly finished steel wire is heated to 380°C. After passing through the high-speed water cooling tube II (13), the wire temperature of the nearly finished steel wire is cooled to room temperature.

[0036] H. Online polishing: The nearly finished steel wire after induction heat treatment is sequentially polished online by symmetrically arranged left and right resin polishing wheels (14-1) and symmetrically arranged upper and lower resin polishing wheels (14-2) in the polishing device (14), thereby removing the oxide layer on the surface of the nearly finished steel wire and making the surface of the nearly finished steel wire smooth and clean; the working surfaces of the left and right resin polishing wheels (14-1) and the upper and lower resin polishing wheels (14-2) are both at an angle of 10° with the moving direction of the steel wire;

[0037] I. Finishing: The polished nearly finished steel wire continues to move forward and passes through the left and right finishing shaping blocks (15) and the upper and lower finishing flattening blocks (16) for cross-section finishing. After finishing, the finished steel wire with a cross-section shape and size of 0.45*2.22mm is obtained (see Figure 2 ——Cross section of finished steel wire of embodiment 1); the left and right finishing shaping blocks (15) are two symmetrical shaping blocks fixed on the same track sliding block, and after being buckled together, they form a width trimming cavity that matches the shape and size of the cross section of the finished steel wire in the width direction; the upper and lower finishing flattening blocks (16) are two symmetrical flattening blocks fixed on the same track sliding block, and after being buckled together, they form a thickness trimming cavity that matches the shape and size of the cross section of the finished steel wire in the thickness direction;

[0038] J. Traction and winding: The finished steel wire obtained after fine finishing is wound onto the winding drum of the winding machine (18) under the traction action of the traction device (17);

[0039] K. Inspection and warehousing: Inspect the finished steel wire. The finished steel wire that meets the requirements of tensile strength of 1700-1750MPa, hardness of 480-500Hv1.0, dimensional tolerance of ±0.005mm, uniform cross-sectional shape, clean and smooth surface without scratches is qualified and will be packaged and stored. Example 2

[0040] A processing technology suitable for high-precision scraper profile wire in Example 2 is achieved by the following steps:

[0041] A. Rough drawing: The coated material is SWRH72A, the wire rod with a diameter of 5.50 mm is unfolded by the wire-laying device (1), and is roughly drawn through the inner cavity of several rough round dies (2) to obtain a regular steel wire with a diameter of 4.20 mm;

[0042] B. Stripping: After rough drawing, the steel wire with a diameter of 4.20 mm is passed through a cutting die (3) to remove 10 wires of rough surface defects on one side, thereby obtaining a steel wire with a diameter of 4.0 mm and no surface defects;

[0043] C. Annealing treatment: After peeling, the steel wire with a diameter of 4.0 mm is moved forward at a linear speed of 5 m / s and sequentially passes through the annealing heating furnace (4) and the annealing water cooling pipe (5) for annealing treatment; after passing through the annealing heating furnace (4), the wire temperature of the steel wire is heated to 750°C, and after passing through the annealing water cooling pipe (5), the wire temperature of the steel wire is controlled to 20-30°C. After annealing treatment, the steel wire structure is stable and the work hardening has been eliminated, which is conducive to subsequent processing;

[0044] D. Fine drawing: The annealed steel wire is finely drawn through the inner cavity of several fine round dies (6) to obtain a round steel wire with a regular diameter of 2.05 mm;

[0045] E. Rolling: The round steel wire after fine drawing continues to move forward and is rolled through several sets of upper and lower rollers in the rolling mill (7) to obtain a flat steel wire of 0.68*3.52mm;

[0046] F. Trimming: The flat steel wire obtained after rolling continues to move forward and passes through the left and right shaping blocks (8) and the upper and lower flattening blocks (9) in sequence to trim the cross section of the steel wire. After trimming, an approximately finished steel wire that basically meets the cross-sectional shape and size requirements is obtained - a trapezoidal cross section of 0.615*0.66*3.45mm; the left and right shaping blocks (8) are two symmetrical shaping blocks fixed on the same track sliding block, and after being buckled left and right, they form a width trimming cavity with a shape and size similar to the width direction of the cross section of the finished steel wire; the upper and lower flattening blocks (9) are two symmetrical flattening blocks fixed on the same track sliding block, and after being buckled up and down, they form a thickness trimming cavity with a shape and size similar to the thickness direction of the cross section of the finished steel wire;

[0047] G. Induction heat treatment: the trimmed nearly finished steel wire continues to move forward and passes through the high-frequency induction heating tube I (10), high-speed water cooling tube I (11), high-frequency induction heating tube II (12), and high-speed water cooling tube II (13) in sequence for induction heat treatment. After passing through the high-frequency induction heating tube I (10), the wire temperature of the nearly finished steel wire is heated to 950°C and kept warm for 10 seconds. After passing through the high-speed water cooling tube I (11), the wire temperature of the nearly finished steel wire is cooled to room temperature. After passing through the high-frequency induction heating tube II (12), the wire temperature of the nearly finished steel wire is heated to 420°C. After passing through the high-speed water cooling tube II (13), the wire temperature of the nearly finished steel wire is cooled to room temperature.

[0048] H. Online polishing: The nearly finished steel wire after induction heat treatment is sequentially polished online by symmetrically arranged left and right resin polishing wheels (14-1) and symmetrically arranged upper and lower resin polishing wheels (14-2) in the polishing device (14), thereby removing the oxide layer on the surface of the nearly finished steel wire and making the surface of the nearly finished steel wire smooth and clean; the working surfaces of the left and right resin polishing wheels (14-1) and the upper and lower resin polishing wheels (14-2) are both at an angle of 20° with the moving direction of the steel wire;

[0049] I. Finishing: The polished nearly finished steel wire continues to move forward and passes through the left and right finishing shaping blocks (15) and the upper and lower finishing flattening blocks (16) for cross-section finishing. After finishing, the finished steel wire with a cross-section shape and size of 0.585*0.63*3.42mm is obtained (see Figure 3 ——Cross section of finished steel wire of embodiment 2); the left and right finishing shaping blocks (15) are two symmetrical shaping blocks fixed on the same track sliding block, and after being buckled together, they form a width trimming cavity that matches the shape and size of the cross section of the finished steel wire in the width direction; the upper and lower finishing flattening blocks (16) are two symmetrical flattening blocks fixed on the same track sliding block, and after being buckled together, they form a thickness trimming cavity that matches the shape and size of the cross section of the finished steel wire in the thickness direction;

[0050] J. Traction and winding: The finished steel wire obtained after fine finishing is wound onto the winding drum of the winding machine (18) under the traction action of the traction device (17);

[0051] K. Inspection and warehousing: Inspect the finished steel wire. The finished steel wire that meets the tensile strength of 1830-1880MPa, hardness of 500-520Hv1.0, dimensional tolerance of ±0.002mm, uniform cross-sectional shape and clean, smooth surface without scratches is qualified. The qualified finished steel wire will be packaged and stored. Example 3

[0052] A processing technology suitable for high-precision scraper profile wire in embodiment 3 is achieved by the following steps:

[0053] A. Rough drawing: The coated material is SWRH72A, the wire rod with a diameter of 5.50 mm is unfolded by the wire-laying device (1), and is roughly drawn through the inner cavity of several rough round dies (2) to obtain a regular steel wire with a diameter of 2.20 mm;

[0054] B. Stripping: After rough drawing, the steel wire with a diameter of 2.20 mm is passed through a cutting die (3) to remove the rough surface of 5 wires with defects on one side, thereby obtaining a steel wire with a diameter of 2.10 mm and no surface defects;

[0055] C. Annealing treatment: After peeling, the steel wire with a diameter of 2.10 mm is moved forward at a linear speed of 8 m / s and sequentially passes through the annealing heating furnace (4) and the annealing water cooling pipe (5) for annealing treatment; after passing through the annealing heating furnace (4), the wire temperature of the steel wire is heated to 720°C, and after passing through the annealing water cooling pipe (5), the wire temperature of the steel wire is controlled to 15-25°C. After annealing treatment, the steel wire structure is stable and the work hardening has been eliminated, which is conducive to subsequent processing;

[0056] D. Fine drawing: The annealed steel wire is finely drawn through the inner cavity of several fine round dies (6) to obtain a regular round steel wire with a diameter of 1.10 mm;

[0057] E. Rolling: The round steel wire after fine drawing continues to move forward and is rolled through several sets of upper and lower rollers in the rolling mill (7) to obtain a flat steel wire of 0.41*1.79mm;

[0058] F. Trimming: The flat steel wire obtained after rolling continues to move forward and passes through the left and right shaping blocks (8) and the upper and lower flattening blocks (9) in sequence to trim the cross section of the steel wire. After trimming, an approximately finished steel wire that basically meets the cross-sectional shape and size requirements is obtained - a pointed trapezoidal cross section of 0.376*0.395*1.69mm; the left and right shaping blocks (8) are two symmetrical shaping blocks fixed on the same track sliding block, and after being buckled left and right, they form a width trimming cavity with a shape and size similar to that of the cross section of the finished steel wire to be finished; the upper and lower flattening blocks (9) are two symmetrical flattening blocks fixed on the same track sliding block, and after being buckled up and down, they form a thickness trimming cavity with a shape and size similar to that of the cross section of the finished steel wire to be finished;

[0059] G. Induction heat treatment: the trimmed nearly finished steel wire continues to move forward and passes through the high-frequency induction heating tube I (10), high-speed water cooling tube I (11), high-frequency induction heating tube II (12), and high-speed water cooling tube II (13) in sequence for induction heat treatment. After passing through the high-frequency induction heating tube I (10), the wire temperature of the nearly finished steel wire is heated to 900°C and kept warm for 6 seconds. After passing through the high-speed water cooling tube I (11), the wire temperature of the nearly finished steel wire is cooled to room temperature. After passing through the high-frequency induction heating tube II (12), the wire temperature of the nearly finished steel wire is heated to 440°C. After passing through the high-speed water cooling tube II (13), the wire temperature of the nearly finished steel wire is cooled to room temperature.

[0060] H. Online polishing: The nearly finished steel wire after induction heat treatment is sequentially polished online by symmetrically arranged left and right resin polishing wheels (14-1) and symmetrically arranged upper and lower resin polishing wheels (14-2) in the polishing device (14), thereby removing the oxide layer on the surface of the nearly finished steel wire and making the surface of the nearly finished steel wire smooth and clean; the working surfaces of the left and right resin polishing wheels (14-1) and the upper and lower resin polishing wheels (14-2) are both at an angle of 15° with the moving direction of the steel wire;

[0061] I. Finishing: The polished nearly finished steel wire continues to move forward and passes through the left and right finishing shaping blocks (15) and the upper and lower finishing flattening blocks (16) for cross-section finishing. After finishing, the finished steel wire with a cross-section shape and size of 0.346*0.365*1.66mm is obtained (see Figure 4 ——Cross section of finished steel wire of embodiment three); the left and right finishing shaping blocks (15) are two symmetrical shaping blocks fixed on the same track sliding block, and after being buckled together, they form a width trimming cavity that matches the shape and size of the cross section of the finished steel wire in the width direction; the upper and lower finishing flattening blocks (16) are two symmetrical flattening blocks fixed on the same track sliding block, and after being buckled together, they form a thickness trimming cavity that matches the shape and size of the cross section of the finished steel wire in the thickness direction;

[0062] J. Traction and winding: The finished steel wire obtained after fine finishing is wound onto the winding drum of the winding machine (18) under the traction action of the traction device (17);

[0063] K. Inspection and warehousing: Inspect the finished steel wire. The qualified finished steel wire shall be packaged and stored if it meets the following conditions: tensile strength of 1980-2030MPa, hardness of 535-555Hv1.0, dimensional tolerance of ±0.003mm, uniform cross-sectional shape, clean and smooth surface without scratches.

Claims

1. A processing technology suitable for high-precision scraper profile wire, characterized by: The processing technology is achieved by the following steps: A. Rough drawing: The coated wire rod is unfolded by the pay-off device (1) and is roughly drawn through the inner cavity of several rough round dies (2) to obtain a regular steel wire; B. Stripping: After rough drawing, the steel wire is passed through a cutting die (3) to remove 5 to 10 rough surfaces with defects on one side, thus obtaining a steel wire without defects on the surface; C. Annealing treatment: The peeled steel wire is moved forward at a linear speed of 5 to 8 m / s and sequentially passes through an annealing heating furnace (4) and an annealing water cooling pipe (5) for annealing treatment; after passing through the annealing heating furnace (4), the wire temperature of the steel wire is heated to 720 to 750°C, and after passing through the annealing water cooling pipe (5), the wire temperature of the steel wire is controlled to 10 to 30°C. After annealing treatment, the steel wire structure is stable and the work hardening has been eliminated, which is conducive to subsequent processing; D. Fine drawing: The annealed steel wire is finely drawn through the inner cavity of several fine round dies (6) to obtain a regular round steel wire; E. Rolling: The round steel wire after fine drawing continues to move forward and is rolled through several sets of upper and lower rollers in the rolling mill (7) to obtain flat steel wire; F. Trimming: The flat steel wire obtained after rolling continues to move forward and passes through the left and right shaping blocks (8) and the upper and lower flattening blocks (9) in sequence to trim the cross section of the steel wire. After trimming, a nearly finished steel wire that basically meets the cross-sectional shape and size requirements is obtained; the left and right shaping blocks (8) are two symmetrical shaping blocks fixed on the same track sliding block, and after being buckled left and right, they form a width trimming cavity with a shape and size similar to the cross section of the finished steel wire in the width direction; the upper and lower flattening blocks (9) are two symmetrical flattening blocks fixed on the same track sliding block, and after being buckled up and down, they form a thickness trimming cavity with a shape and size similar to the cross section of the finished steel wire in the thickness direction; G. Induction heat treatment: the trimmed nearly finished steel wire continues to move forward and passes through the high-frequency induction heating tube I (10), high-speed water cooling tube I (11), high-frequency induction heating tube II (12), and high-speed water cooling tube II (13) in sequence for induction heat treatment. After passing through the high-frequency induction heating tube I (10), the wire temperature of the nearly finished steel wire is heated to 870-950°C and kept warm for 6-10 seconds. After passing through the high-speed water cooling tube I (11), the wire temperature of the nearly finished steel wire is cooled to room temperature. After passing through the high-frequency induction heating tube II (12), the wire temperature of the nearly finished steel wire is heated to 380-440°C. After passing through the high-speed water cooling tube II (13), the wire temperature of the nearly finished steel wire is cooled to room temperature. H. Online polishing: The nearly finished steel wire after induction heat treatment is sequentially polished online by symmetrically arranged left and right resin polishing wheels (14-1) and symmetrically arranged upper and lower resin polishing wheels (14-2) in the polishing device (14), thereby removing the oxide layer on the surface of the nearly finished steel wire and making the surface of the nearly finished steel wire smooth and clean; the working surfaces of the left and right resin polishing wheels (14-1) and the upper and lower resin polishing wheels (14-2) are both at an angle of 10 to 20 degrees with the moving direction of the steel wire; I. Finishing: The polished nearly finished steel wire continues to move forward and passes through the left and right finishing shaping blocks (15) and the upper and lower finishing flattening blocks (16) in sequence for cross-section finishing. After finishing, a finished steel wire that fully meets the cross-section shape and size requirements is obtained; the left and right finishing shaping blocks (15) are two symmetrical shaping blocks fixed on the same track sliding block, and after being buckled left and right, they form a width trimming cavity that matches the shape and size of the cross section of the finished steel wire to be finished; the upper and lower finishing flattening blocks (16) are two symmetrical flattening blocks fixed on the same track sliding block, and after being buckled up and down, they form a thickness trimming cavity that matches the shape and size of the cross section of the finished steel wire to be finished; J. Traction and winding: The finished steel wire obtained after fine finishing is wound onto the winding drum of the winding machine (18) under the traction action of the traction device (17); K. Inspection and warehousing: Inspect the finished steel wire. The qualified finished steel wire shall be packaged and stored if it meets the requirements of tensile strength of 1700MPa or above, hardness of 480-560Hv1.0, dimensional tolerance of ±0.005mm, uniform cross-sectional shape, clean and smooth surface without scratches.

Images