Narrow-side-width wind power flange production equipment and process

Abstract

The invention discloses narrow-edge wide wind power flange production equipment and process, and relates to the technical field of wind power generation flange production, the narrow-edge wide wind power flange production equipment comprises a rack, a shaft rod is arranged on the rack, the outer wall of the shaft rod is sleeved with a rod sleeve, a main rotating roller is arranged on one side of the shaft rod, and a support is arranged on the other side of the shaft rod; a first rocker arm and a second rocker arm are rotationally arranged on the two sides of the periphery of the shaft rod and the main rotating roller correspondingly, and auxiliary rotating rollers are installed at the ends of the first rocker arm and the second rocker arm. The support is in transverse sliding fit with the inner side wall of the rack, a displacement mechanism in transmission connection with the support is installed in the rack, and a first taper pipe and a second taper pipe which are arranged up and down are installed in the support. According to the method, the utilization rate of raw materials is increased, the turning allowance of machining is increased, the blank machining efficiency is further improved, the effective thickness of performance heat treatment is reduced, heat treatment energy consumption is reduced, and meanwhile the mechanical performance of the narrow-edge wide wind power flange can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation flange production, and specifically discloses narrow-side-width wind power generation flange production equipment and a process. Background Art

[0002] Wind turbine flanges are structural parts that connect the various sections of wind turbine towers or the tower and hub, or the hub and blades. Their main function is to fix and connect important components of wind turbines. The main function of wind turbine flanges is to ensure that the various parts of the wind turbine can be tightly combined through bolt connection to form a stable whole; this connection method not only ensures the stability and safety of the wind turbine during operation, but also helps to improve the conversion efficiency of wind energy. There are many types of wind turbine flanges used in wind turbines, and the narrow-edge wide wind turbine flange is one of the many wind turbine flanges; the narrow-edge wide wind turbine flange has a narrow outer edge, and the design structure of the narrow-edge wide wind turbine flange makes the compression force required for sealing smaller and the sealing is better.

[0003] In the manufacturing process of wind turbine flanges, the stroke of the main roller and the core roller of the traditional ring rolling machine is limited, thereby limiting the size of the produced wind turbine flanges. Some wind turbine flange blanks with a side width less than 135 mm cannot be effectively rolled. To solve the above problem, technical personnel in this field usually need to increase the margin of the blank so that the side width of the wind turbine flange blank reaches the range of sizes that can be rolled. However, the above method not only increases material consumption and production costs, but also reduces the competitiveness of the products, bringing immeasurable losses to the company. Summary of the invention

[0004] In view of the problem that in the current process of producing narrow-width wind turbine flanges, the production cost is high and the product competitiveness is poor due to the need to increase the surplus of the blank in advance, the present invention provides a narrow-width wind turbine flange production equipment and process.

[0005] To solve the above problems, in a first aspect, the present invention provides the following technical solutions: The cam is an axial rod for fixing a blank, and a rod sleeve is fixedly mounted on the outer wall of the cam, and the rod sleeve contacts with the inner circumferential wall of the blank, and a main rotating roller is rotatably arranged on one side of the cam, and a bracket is arranged on the other side of the cam; a first rocker arm and a second rocker arm are rotatably arranged on both sides of the outer circumference of the cam and the main rotating roller, and a rotatable auxiliary rotating roller is installed at the ends of the first rocker arm and the second rocker arm, and the main rotating roller and the auxiliary rotating roller are in contact with the outer circumferential wall of the blank; the bracket is laterally slidably matched with the inner side wall of the bracket, and a displacement mechanism connected to the bracket for transmission is installed in the bracket, and a first cone tube and a second cone tube arranged up and down are installed in the bracket, the first cone tube is obliquely arranged and moves longitudinally inside the bracket, and the second cone tube is horizontally arranged, and the first cone tube and the second cone tube are respectively in contact with the upper end face and the lower end face of the blank.

[0006] Preferably, a rod seat is fixedly installed in the stand, the shaft rod is tightly inserted in the upper seat surface of the rod seat, and the rod sleeve and the shaft rod are interference fit.

[0007] Preferably, a base is provided on the side of the main rotating roller, and the base is tightly connected to the platform, and an articulated frame is fixedly installed on the upper seat surface of the base, and a first rotating shaft is installed in the articulated frame, and a first shaft sleeve is fixedly mounted on the outer peripheral wall of the first rotating shaft, and a cylinder seat is fixedly connected to the side of the base, and an obliquely arranged cylinder is fixedly mounted on the cylinder seat, and a ball head is fixedly installed on the end of the piston rod of the cylinder, and the ball head is hinged to the first shaft sleeve, and rotating frames are fixedly mounted on both ends of the first rotating shaft, and circular grooves are opened at the ends of the rotating frames, and the circular grooves are plugged into the top end of the shaft rod.

[0008] Preferably, a reducer is fixedly installed in the platform, a first motor is arranged on the outside of the reducer, a coupling for transmission is installed between the input shaft of the reducer and the output shaft of the first motor, and the output shaft of the reducer is arranged vertically upward and is tightly connected to the main rotating roller.

[0009] Preferably, second bushings are fixedly mounted on the outer side walls on both sides of the platform, second rotating shafts are rotatably mounted in the second bushings, and the top ends of the two second rotating shafts are respectively firmly connected to the first rocker arm and the second rocker arm.

[0010] Preferably, the displacement mechanism includes a base fastened to the stand, an electric rail is fixedly mounted on the base, a first side plate fastened to the base is arranged on the outer side of the electric rail, a slide seat is slidably mounted on the electric rail, a load-bearing plate is fastened to the slide seat, the load-bearing plate is fastened to the bottom end of the bracket, a second side plate is fastened to the outer side of the load-bearing plate, a transversely arranged trough body is fixedly mounted on the inner side plate surface of the first side plate, a roller is mounted on the outer side plate surface of the second side plate, and the roller is slidably engaged with the inner wall of the trough body.

[0011] Preferably, a longitudinally arranged guide rail is installed on the inner wall of the bracket, and a second motor is arranged in the bracket. Both sides of the second motor are slidably matched with the guide rail, and the output shaft of the second motor is transmission-connected to the first cone tube; a third motor is arranged below the second motor and is tightly connected to the inner wall of the bracket, and the output shaft of the third motor is transmission-connected to the second cone tube.

[0012] On the other hand, the present invention also provides a narrow side width wind power flange production process, comprising the following steps: S1. Based on the preset weight of the narrow side width wind turbine flange, a sawing machine is used to cut the low alloy high strength structural steel to obtain the original blank; S2. The original blank is heated and kept at a predetermined temperature; S3. After the insulation is completed, the billet is subjected to material upsetting, punching and hole expansion using a hydraulic press; S4. Place the expanded blank stably on the shaft, make the rod sleeve contact with the inner circumferential wall of the blank, the main roller and the auxiliary roller contact with the outer circumferential wall of the blank, and make the first cone tube and the second cone tube contact with the upper end face and the lower end face of the blank respectively, so that the first cone tube and the second cone tube clamp the blank, drive the blank to rotate on the shaft through the main roller, and drive the bracket to slide horizontally on the inner wall of the stand through the displacement mechanism, so as to roll the blank into a narrow-edge wide wind turbine flange.

[0013] Preferably, the heating temperature in S2 is 1220°C-1260°C, the heating rate is 120mm / h-140mm / h, and the holding time is based on the smaller value of the billet diameter or thickness.

[0014] Preferably, after the oil press in S3 completes processing of the blank, it needs to be returned to the furnace for a second time for heat preservation, and the time for the second time for heat preservation is 1 / 3-1 / 2 of the heat preservation time in S2.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The shaft rod and the rod sleeve in the present invention can contact the inner circumferential wall of the blank, the main roller and the auxiliary roller can contact the outer circumferential wall of the blank, the upper end face and the lower end face of the blank can be stably clamped by the first tapered tube and the second tapered tube, and the blank can be pulled under the action of the displacement mechanism. During the action of the displacement mechanism, the rod sleeve can simultaneously widen the inner and outer diameters of the blank under the action of the main roller and the auxiliary roller, thereby rolling the blank into a narrow-side and wide wind power flange. The present invention improves the utilization rate of raw materials, increases the machining turning allowance, further enhances the processing efficiency of the blank, and reduces the effective thickness of the performance heat treatment. While reducing the energy consumption of the heat treatment, it can effectively improve the mechanical properties of the narrow-side and wide wind power flange, and therefore has a very broad application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Figure 1 It is a schematic diagram of the overall device structure of the present invention; Figure 2 It is a schematic diagram of the installation structure of the first rocker arm and the second rocker arm of the present invention; Figure 3 It is a schematic diagram of the cylinder installation structure of the present invention; Figure 4 It is a schematic diagram of the installation structure of the first cone tube and the second cone tube of the present invention; Figure 5 It is a schematic diagram of the displacement mechanism structure of the present invention; In the figure: 1. stand, 2. shaft, 3. rod sleeve, 4. main roller, 5. bracket, 6. first rocker arm, 7. second rocker arm, 8. auxiliary roller, 9. displacement mechanism, 901. base, 902. electric rail, 903. first side plate, 904. slide seat, 905. load-bearing plate, 906. second side plate, 907. tank body, 908. roller, 10. first cone tube, 11. second cone tube, 12. rod seat, 13. base, 14. articulated frame, 15. first rotating shaft, 16. first shaft sleeve, 17. cylinder seat, 18. cylinder, 19. ball head, 20. rotating frame, 21. circular groove, 22. reducer, 23. first motor, 24. coupling, 25. second shaft sleeve, 26. second rotating shaft, 27. guide rail, 28. second motor, 29. third motor. DETAILED DESCRIPTION

[0017] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0018] This specific embodiment provides a narrow side width wind turbine flange production equipment, such as Figure 1-Figure 5 As shown; it includes a stand 1, which is composed of two vertically placed support plates, a rod seat 12 is fixedly installed inside the stand 1, and the rod seat 12 is arranged in the middle of the stand 1. The two side surfaces of the rod seat 12 are tightly connected to the inner wall of the stand 1, and a shaft 2 is tightly inserted in the upper seat surface of the rod seat 12. The bottom end of the shaft 2 is tightly inserted with the rod seat 12, and the top end of the shaft 2 is vertically facing the upper side of the stand 1. A rod sleeve 3 is fixedly sleeved on the outer wall of the shaft 2, and the inner peripheral wall of the rod sleeve 3 is interference fit with the outer peripheral wall of the shaft 2, and the length of the rod sleeve 3 is smaller than the shaft 2.

[0019] A reducer 22 is fixedly installed in the stand 1, and the housing of the reducer 22 is tightly connected to the stand 1. A first motor 23 is arranged on the outside of the reducer 22, and a coupling 24 for transmission is installed between the input shaft of the reducer 22 and the output shaft of the first motor 23. The output shaft of the reducer 24 is arranged vertically upward, and the top end of the output shaft of the reducer 24 is fixedly connected to the main roller 4; through the drive of the first motor 23 and the transmission of the reducer 24, the output shaft of the reducer 24 can drive the main roller 4 to rotate, and the main roller 4 is arranged on one side of the shaft 2, and a bracket 5 is provided on the other side of the shaft 2.

[0020] The first rocker arm 6 and the second rocker arm 7 are rotatably mounted on both sides of the outer periphery of the shaft rod 2 and the main rotating roller 4, and the second sleeves 25 are fixedly mounted on the outer side walls of both sides of the platform 1. Two second sleeves 25 are provided, and the two second sleeves 25 are symmetrically arranged and the outer walls are tightly connected to the platform 1; the second rotating shafts 26 are rotatably mounted in the two second sleeves 25, and the top ends of the two second rotating shafts 26 are tightly connected to the first rocker arm 6 and the second rocker arm 7. The ends of the first rocker arm 6 and the second rocker arm 7 are both mounted with rotating auxiliary rollers 8.

[0021] A base 13 is provided on the side of the main rotating roller 4, and the base 13 is arranged on the side of the main rotating roller 4 away from the bracket 5; the base 13 is tightly connected to the stand 1, and an articulated frame 14 is fixedly installed on the upper seat surface of the base 13, and two articulated frames 14 are provided and symmetrically arranged on the upper seat surface of the base 13, and a first rotating shaft 15 is commonly installed in the two articulated frames 14, and the outer wall of the first rotating shaft 15 is rotatably matched with the articulated frame 14, and a first shaft sleeve 16 is fixedly sleeved on the outer peripheral wall of the first rotating shaft 15, and the inner sleeve wall of the first shaft sleeve 16 is tightly connected to the outer peripheral wall of the first rotating shaft 15, and the first shaft sleeve 16 is arranged between the two articulated frames 14. The side of the base 13 is fixedly connected with a cylinder seat 17, which is composed of a vertical surface and an inclined surface. The vertical surface of the cylinder seat 17 is tightly connected to the side of the base 13. The inclined surface of the cylinder seat 17 is fixedly installed with a cylinder 18, which is arranged obliquely and the cylinder body of the cylinder 18 is fixedly installed on the cylinder seat 17; the piston rod end of the cylinder 18 is fixedly installed with a ball head 19, and the bottom of the first sleeve 16 is provided with a hinged portion hinged with the ball head 19. The two ends of the first rotating shaft 15 are arranged on the outside of the two articulated frames 14 and fixedly sleeved with a rotating frame 20, and the end of the rotating frame 20 is provided with a circular groove 21, and the circular groove 21 is plugged with the top of the shaft rod 2. By setting the cylinder 18, the piston rod of the cylinder 18 pushes the first sleeve 16 to rotate, driving the first rotating shaft 15 to rotate, thereby rotating the rotating frame 20, so that the rotating frame 20 is fixedly arranged on the top of the shaft rod 2.

[0022] The bracket 5 is slidably matched with the inner side wall of the platform 1, and a displacement mechanism 9 connected to the bracket 5 is installed in the platform 1. The displacement mechanism 9 includes a base 901 that is fastened to the platform 1, and an electric rail 902 is fixedly installed on the base 901. The outer side of the electric rail 902 is provided with a first side plate 903 that is fastened to the base 901. Two first side plates 903 are provided and arranged symmetrically. A slide seat 904 is slidably installed on the electric rail 902. The electric rail 902 can drive the slide seat 904 to slide smoothly along the linear arrangement direction of the electric rail 902; the slide seat 904 is fastened with a load-bearing plate. 905, the load-bearing plate 905 is fastened to the bottom end of the bracket 5, and the outer side of the load-bearing plate 905 is fastened to the second side plate 906, and the second side plates 906 are provided with two and symmetrically arranged, and the inner side plate surface of the first side plate 903 is fixedly installed with a transversely arranged groove body 907, and the inner groove surface of the groove body 907 faces the second side plate 906, and the outer side plate surface of the second side plate 906 is installed with a roller 908, and the roller 908 is slidably matched with the inner wall of the groove body 907. By setting the matching structure of the electric rail 902 and the slide seat 904, the load-bearing plate 905 and the bracket 5 can be driven to slide smoothly along the linear arrangement direction of the electric rail 902, and by setting the matching mechanism of the roller 908 and the groove body 907, the stability of the bracket 5 and the inner side wall of the stand 1 when sliding transversely is further increased.

[0023] The bracket 5 is provided with a first cone tube 10 and a second cone tube 11, which are arranged up and down. A longitudinally arranged guide rail 27 is installed on the inner wall of the bracket 5, and two guide rails 27 are provided and are tightly connected to the inner wall of the bracket 5. A second motor 28 is provided in the bracket 5, and both sides of the second motor 28 are slidably matched with the two guide rails 27, and the output shaft of the second motor 28 is connected to the first cone tube 10 by transmission; a third motor 29 is provided below the second motor 28 and is tightly connected to the inner wall of the bracket 5, and the output shaft of the third motor 29 is connected to the second cone tube 11 by transmission; the first cone tube 10 is arranged obliquely, and the second cone tube 11 is arranged horizontally.

[0024] The above describes in detail an embodiment of a narrow side width wind power flange production device. Based on the narrow side width wind power flange production device described in the above embodiment, an embodiment of the present invention also provides a narrow side width wind power flange production method corresponding to the device, comprising the following steps: S1. Based on the preset weight of the narrow side width wind turbine flange, a sawing machine is used to cut the low alloy high strength structural steel, the material of the low alloy structural steel is: S355NL-Z25, the raw material specification is: φ600 round steel, so as to obtain the original blank; S2. The original blank is heated by placing it in a natural gas heating furnace at a heating temperature of 1220°C-1260°C and a heating rate of 120mm / h-140mm / h. After the original blank is heated, the original blank is kept warm for a period of 4-5h based on the smaller value of the diameter or thickness of the blank; S3. After the insulation is completed, the billet is subjected to material upsetting, punching and hole expansion using a hydraulic press to ensure that the forging ratio is greater than 2, so as to ensure that the core of the billet is completely forged during the forging process. For punching, a punch with a diameter of 280 mm is used to punch the center of the billet to ensure that the loose parts in the center of the raw material are completely removed. For hole expansion, a horse frame and a horse bar are used to expand the inner hole of the billet to a size exceeding the outer diameter of the rod sleeve 3; S4. After the hydraulic press completes processing of the blank, it needs to be returned to the furnace for a second time for heat preservation. The time for the second time for heat preservation is 1 / 3-1 / 2 of the heat preservation time in S2, and the second time for heat preservation is controlled between 2-3h. After the second time for heat preservation, the expanded blank is stably placed on the shaft 2, so that the rod sleeve 3 contacts the inner circumferential wall of the blank, the main roller 4 and the auxiliary roller 8 contact the outer circumferential wall of the blank, and the first cone tube 10 and the second cone tube 11 contact the upper end face and the lower end face of the blank respectively, so that the first cone tube 10 and the second cone tube 11 clamp the blank, and the blank is driven to rotate on the shaft 2 by the main roller 4, and the bracket 5 is driven to slide laterally on the inner wall of the stand 1 by the displacement mechanism 9, so that the blank is rolled into a narrow-edge wide wind power flange.

[0025] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A narrow side width wind turbine flange production device, comprising a stand (1), characterized in that: The stand (1) is provided with a shaft (2) for fixing the blank, a rod sleeve (3) is fixedly sleeved on the outer wall of the shaft (2), the rod sleeve (3) is in contact with the inner circumferential wall of the blank, a main rotating roller (4) is rotatably provided on one side of the shaft (2), and a bracket (5) is provided on the other side of the shaft (2); a first rocker arm (6) and a second rocker arm (7) are rotatably provided on both sides of the outer circumference of the shaft (2) and the main rotating roller (4), respectively, and the ends of the first rocker arm (6) and the second rocker arm (7) are both installed with a rotatable auxiliary rotating roller (8), and the main rotating roller (4) is rotatably provided on both sides of the outer circumference of the shaft (2) and the main rotating roller (4). ), and the auxiliary rotating roller (8) are in contact with the outer peripheral wall of the blank; the bracket (5) is slidably matched with the inner side wall of the platform (1) in a transverse manner; a displacement mechanism (9) connected to the bracket (5) in a transmission manner is installed in the platform (1); a first cone tube (10) and a second cone tube (11) arranged up and down are installed in the bracket (5); the first cone tube (10) is obliquely arranged and moves longitudinally inside the bracket (5); the second cone tube (11) is horizontally arranged; the first cone tube (10) and the second cone tube (11) are in contact with the upper end surface and the lower end surface of the blank respectively.

2. The narrow side width wind turbine flange production equipment according to claim 1 is characterized in that: A rod seat (12) is fixedly installed in the stand (1), the shaft rod (2) is firmly inserted into the upper seat surface of the rod seat (12), and the rod sleeve (3) and the shaft rod (2) are in interference fit.

3. The narrow side width wind turbine flange production equipment according to claim 1 is characterized in that: A base (13) is provided on the side of the main rotating roller (4), and the base (13) is tightly connected to the stand (1). An articulated frame (14) is fixedly installed on the upper seat surface of the base (13), and a first rotating shaft (15) is installed in the articulated frame (14). A first shaft sleeve (16) is fixedly sleeved on the outer peripheral wall of the first rotating shaft (15). A cylinder seat (17) is fixedly connected to the side of the base (13), and an obliquely arranged cylinder (18) is fixedly installed on the cylinder seat (17). A ball head (19) is fixedly installed on the end of the piston rod of the cylinder (18), and the ball head (19) is hinged to the first shaft sleeve (16). Rotating frames (20) are fixedly sleeved on both ends of the first rotating shaft (15), and circular grooves (21) are provided at the ends of the rotating frames (20), and the circular grooves (21) are plugged into the top end of the shaft rod (2).

4. The narrow side width wind turbine flange production equipment according to claim 1 is characterized in that: A reducer (22) is fixedly installed in the platform (1), a first motor (23) is arranged outside the reducer (22), a coupling (24) for transmission is installed between the input shaft of the reducer (22) and the output shaft of the first motor (23), and the output shaft of the reducer (24) is arranged vertically upward and is tightly connected to the main rotating roller (4).

5. The narrow side width wind turbine flange production equipment according to claim 1 is characterized in that: Second shaft sleeves (25) are fixedly mounted on the outer side walls of both sides of the platform (1), and second rotating shafts (26) are rotatably mounted in the second shaft sleeves (25). The top ends of the two second rotating shafts (26) are respectively fixedly connected to the first rocker arm (6) and the second rocker arm (7).

6. The narrow side width wind turbine flange production equipment according to claim 1 is characterized in that: The displacement mechanism (9) comprises a base (901) which is fastened to the stand (1); an electric rail (902) is fixedly mounted on the base (901); a first side plate (903) which is fastened to the base (901) is arranged on the outer side of the electric rail (902); a slide seat (904) is slidably mounted on the electric rail (902); a load-bearing plate (905) is fastened to the slide seat (904); the load-bearing plate (905) is fastened to the bottom end of the bracket (5); a second side plate (906) is fastened to the outer side of the load-bearing plate (905); a transversely arranged groove body (907) is fixedly mounted on the inner side plate surface of the first side plate (903); a roller (908) is mounted on the outer side plate surface of the second side plate (906); the roller (908) is slidably engaged with the inner wall of the groove body (907).

7. The narrow side width wind turbine flange production equipment according to claim 1 is characterized in that: A longitudinally arranged guide rail (27) is mounted on the inner wall of the bracket (5); a second motor (28) is arranged inside the bracket (5); two sides of the second motor (28) are slidably matched with the guide rail (27); an output shaft of the second motor (28) is drivingly connected to the first cone tube (10); and a third motor (29) is arranged below the second motor (28) and is fixedly connected to the inner wall of the bracket (5); an output shaft of the third motor (29) is drivingly connected to the second cone tube (11).

8. A narrow side width wind turbine flange production process, characterized in that: The process comprises: S1. Based on the preset weight of the narrow side width wind turbine flange, a sawing machine is used to cut the low alloy high strength structural steel to obtain the original blank; S2. The original blank is heated and kept at a predetermined temperature; S3. After the insulation is completed, the billet is subjected to material upsetting, punching and hole expansion using a hydraulic press; S4. The expanded blank is stably placed on the shaft (2), so that the rod sleeve (3) contacts the inner peripheral wall of the blank, the main roller (4) and the auxiliary roller (8) contact the outer peripheral wall of the blank, and the first cone tube (10) and the second cone tube (11) contact the upper end face and the lower end face of the blank respectively, so that the first cone tube (10) and the second cone tube (11) clamp the blank, and the blank is driven to rotate on the shaft (2) by the main roller (4), and the bracket (5) is driven to slide horizontally on the inner wall of the stand (1) by the displacement mechanism (9), so that the blank is rolled and formed into a narrow-edge wide wind turbine flange.

9. A narrow side width wind turbine flange production process according to claim 8, characterized in that: The heating temperature in S2 is 1220°C-1260°C, the heating rate is 120mm / h-140mm / h, and the holding time is based on the smaller value of the billet diameter or thickness.

10. A narrow side width wind turbine flange production process according to claim 8, characterized in that: After the oil press in S3 completes the processing of the blank, it needs to be returned to the furnace for a second time for heat preservation, and the time for the second time for heat preservation is 1 / 3-1 / 2 of the heat preservation time in S2.

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