A molding equipment and method for ultra-low inclusion stainless steel EP pipe

Abstract

This invention discloses a forming equipment and method for ultra-low inclusion stainless steel EP pipes, belonging to the field of stainless steel pipe processing. The forming equipment includes a base, on which a straightening component, a guiding component, and a forming component are sequentially arranged. A guide frame is fixedly installed on the outside of the straightening component, and the guide frame is fixedly installed above the base. The straightening component includes upper straightening rollers and lower straightening rollers, with two of each type. The upper straightening rollers are positioned above the lower straightening rollers, and an upper slider is arranged between the two upper straightening rollers. Each upper straightening roller is rotatably connected to the upper slider via a roller shaft one. A lower slider is arranged between the two lower straightening rollers, and each lower straightening roller is rotatably connected to the lower slider via a roller shaft two. This invention, using the above-mentioned forming equipment and method, has a simple structure and is easy to adjust. It can improve the straightness, roundness, and dimensional consistency of the steel pipe, ensuring the processing quality of subsequent electrolytic polishing processes.

Description

Technical Field

[0001] This invention relates to the field of stainless steel pipe processing technology, and in particular to a forming equipment and method for ultra-low inclusion stainless steel EP pipe. Background Technology

[0002] Ultra-low inclusion stainless steel EP tubes are widely used in semiconductors, integrated circuits, biomedicine, food processing, and high-purity gas transportation due to their high cleanliness, excellent corrosion resistance, and smooth inner wall. To ensure uniform and stable surface quality during subsequent electrolytic polishing, high requirements are placed on dimensional accuracy, roundness, and straightness during the forming stage.

[0003] Most existing stainless steel pipe forming equipment adopts a fixed straightening and forming structure. When processing steel pipes of different specifications, it is necessary to adjust the positions of multiple straightening rollers or forming rollers separately. The adjustment process is cumbersome, and the synchronization between the rollers is poor, which can easily lead to uneven stress on the steel pipe, thus affecting the forming accuracy. At the same time, some equipment lacks an effective guiding and positioning structure, and the steel pipe is prone to lateral deviation or posture changes during transportation, further reducing the roundness consistency and dimensional stability of the steel pipe, making it difficult to meet the high-precision forming requirements of ultra-low inclusion stainless steel EP pipes. Summary of the Invention

[0004] The purpose of this invention is to provide a molding equipment and method for ultra-low inclusion stainless steel EP pipes to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides an ultra-low inclusion stainless steel EP tube forming device, comprising a base, on which a straightening component, a guiding component, and a forming component are sequentially arranged. A guide frame is fixedly arranged on the outside of the straightening component, and the guide frame is fixedly arranged above the base. The straightening component includes upper straightening rollers and lower straightening rollers, and two of each type are provided. The upper straightening rollers are arranged above the lower straightening rollers, and an upper slider is arranged between the two upper straightening rollers. The upper straightening rollers are rotatably connected to the upper slider via a roller shaft one. A lower slider is arranged between the two lower straightening rollers, and the lower straightening rollers are rotatably connected to the lower slider via a roller shaft two.

[0006] Preferably, the straightening assembly further includes a threaded rod, the upper slider and the lower slider are symmetrically arranged on the threaded rod, and the threaded rod is symmetrically provided with two reverse threads, the upper slider and the lower slider are respectively helically connected to the two reverse threads.

[0007] Preferably, a limit plate and a servo motor are fixedly mounted on the top and bottom ends of the threaded rod through the guide frame, respectively. The threaded rod is rotatably connected to the guide frame. An installation groove is provided in the base, and the servo motor is disposed in the installation groove.

[0008] Preferably, guide groove one and guide groove two are provided on both sides of the guide frame.

[0009] Preferably, the other end of the first roller shaft passes through the upper straight roller and the guide groove in sequence and is fixedly connected to a drive wheel. The first roller shaft is fixedly connected to the upper straight roller. The other end of the second roller shaft passes through the lower straight roller and the guide groove in sequence and is fixedly connected to a limit plate. The second roller shaft is fixedly connected to the lower straight roller.

[0010] Preferably, the guiding component includes a guide seat, and guide sleeves are symmetrically arranged inside the guide seat, with a guide hole formed at the center of the guide sleeve.

[0011] Preferably, the base is provided with a groove, and a fixing plate is fixedly disposed above the groove.

[0012] Preferably, the molding assembly includes an extrusion roller one and an extrusion roller two. The extrusion roller one is disposed above the base via a rotating rod one. A servo motor two is fixedly disposed at the bottom of the rotating rod one. The servo motor two is fixedly disposed above the fixed plate. The extrusion roller two is symmetrically disposed on both sides of the extrusion roller one. A rotating rod two is fixedly disposed below the extrusion roller two. A moving block is rotatably connected below the rotating rod two.

[0013] Preferably, the movable block is slidably connected to the groove, and a threaded rod is threadedly connected to the middle of the movable block. The threaded rod has two reverse threads, and the two movable blocks are respectively helically connected to the two reverse threads. One end of the threaded rod passes through the base and is fixedly connected to a servo motor.

[0014] This invention also provides a method for forming ultra-low inclusion stainless steel EP tubes, comprising the following steps: S1. Start each servo motor according to the specifications of the ultra-low inclusion stainless steel EP tube to be formed, and adjust the working gap of the straightening component and the forming component respectively to put the equipment in the forming preparation state. S2. The steel pipe is fed into the straightening assembly, and the steel pipe is continuously straightened by alternating rolling of the upper and lower straightening rollers. S3. After straightening, the steel pipe enters the guide assembly and is guided and positioned under the limiting action of the guide sleeve to ensure that the steel pipe enters the forming area stably. S4. Drive the two extrusion rollers on both sides to move synchronously according to the steel pipe specifications, and adjust the forming gap between the three sets of extrusion rollers to meet the forming requirements. S5. Drive the extrusion rollers to rotate continuously, so that the steel pipe can complete the roundness correction and dimensional shaping under the joint extrusion action of the three sets of extrusion rollers; S6. The equipment continuously outputs the formed ultra-low inclusion stainless steel EP tubes, completing the entire forming process.

[0015] Therefore, the present invention employs the above-mentioned ultra-low inclusion stainless steel EP tube forming equipment and forming method, which has the following beneficial effects: (1) By setting up a synchronously adjustable straightening component, the present invention uses reverse thread to drive the upper and lower straightening rollers to move synchronously, so that steel pipes of different specifications can quickly complete the straightening gap adjustment, which improves the applicability and adjustment efficiency of the equipment and effectively improves the straightness of the steel pipes.

[0016] (2) The present invention provides a guide component to guide and position the steel pipe before it enters the forming area, which can limit the lateral swing and axial offset of the steel pipe, so that the steel pipe enters the forming area stably and improves the stability and dimensional consistency of the subsequent forming process.

[0017] (3) The present invention adopts a three-roll synchronous extrusion molding structure. The two extrusion rollers are synchronously adjusted by driving the reverse thread, so that the steel pipe is subjected to more uniform force during the molding process, which is conducive to improving the roundness, wall thickness uniformity and dimensional accuracy of the steel pipe, and reducing local plastic deformation and residual stress.

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an ultra-low inclusion stainless steel EP tube forming device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the straightening component according to an embodiment of the present invention; Figure Labels 1. Base; 2. Straightening assembly; 21. Upper straightening roller; 22. Lower straightening roller; 23. Threaded rod one; 24. Upper slider; 25. Lower slider; 26. Limiting plate one; 27. Servo motor one; 28. Drive wheel; 29. ​​Limiting plate two; 3. Guide assembly; 31. Guide seat; 32. Guide sleeve; 4. Forming assembly; 41. Extrusion roller one; 42. Extrusion roller two; 43. Rotating rod one; 44. Servo motor two; 45. Rotating rod two; 46. Moving block; 47. Threaded rod two; 48. Servo motor three; 5. Guide frame; 51. Guide groove one; 52. Guide groove two; 6. Groove; 61. Fixing plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] Example like Figure 1 As shown, the present invention provides an ultra-low inclusion stainless steel EP tube forming device, including a base 1, on which a straightening component 2, a guiding component 3 and a forming component 4 are sequentially arranged.

[0023] Reference Figure 2 A guide frame 5 is fixedly installed on the outside of the straightening component 2, and the guide frame 5 is fixedly installed above the base 1.

[0024] The straightening assembly 2 includes an upper straightening roller 21, a lower straightening roller 22, and a threaded rod 23. Two upper straightening rollers 21 and two lower straightening rollers 22 are provided. An upper slider 24 is positioned between the two upper straightening rollers 21, and each upper straightening roller 21 is rotatably connected to the upper slider 24 via a roller shaft. A lower slider 25 is positioned between the two lower straightening rollers 22, and each lower straightening roller 22 is rotatably connected to the lower slider 25 via a roller shaft. The upper slider 24 and lower slider 25 are symmetrically arranged on the threaded rod 23, which has two symmetrically arranged reverse threads. The upper slider 24 and lower slider 25 are respectively helically connected to the two reverse threads. A limit plate 26 and a servo motor 27 are fixedly mounted at the top of the threaded rod 23 and through a guide frame, respectively.

[0025] The base 1 has a mounting slot located below the guide frame, and the servo motor 27 is installed in the mounting slot.

[0026] Guide groove 1 51 and guide groove 2 52 are provided on both sides of the guide frame.

[0027] The other end of roller shaft one passes through the upper straight roller 21 and guide groove one 51 and is fixedly connected to a drive wheel 28. Roller shaft one is fixedly connected to the upper straight roller 21. The other end of roller shaft two passes through the lower straight roller 22 and guide groove two 52 and is fixedly connected to a limit plate two 29. Roller shaft two is fixedly connected to the lower straight roller 22.

[0028] The upper straight roller 21 and the lower straight roller 22 have different rolling radii.

[0029] The threaded rod 23 is rotatably connected to the guide frame.

[0030] The guide assembly 3 includes a guide seat 31, inside which guide sleeves 32 are symmetrically arranged. A guide hole is formed at the center of the guide sleeve 32, and the diameter of the guide hole is slightly larger than the outer diameter of the steel pipe. The guide assembly 3 can limit lateral swaying and ensure a stable posture when entering the forming assembly 4.

[0031] The base 1 has a groove 6, and a fixing plate 61 is fixedly installed above the groove 6.

[0032] The molding component 4 includes an extrusion roller 41 and an extrusion roller 42. The extrusion roller 41 is mounted above the base 1 via a rotating rod 43. A servo motor 44 is fixedly mounted at the bottom of the rotating rod 43 and is fixedly mounted above the fixed plate 61. The extrusion roller 42 is symmetrically arranged on both sides of the extrusion roller 41. A rotating rod 45 is fixedly mounted below the extrusion roller 42. A moving block 46 is rotatably connected below the rotating rod 45. The moving block 46 is slidably connected to the groove 6. A threaded rod 47 is threadedly connected to the middle of the moving block 46. The threaded rod 47 has two reverse threads. The two moving blocks 46 are respectively helically connected to the two reverse threads. One end of the threaded rod 47 extends out of the base 1 and is fixedly connected to a servo motor 48. The other end of the threaded rod 47 is rotatably connected to the groove 6.

[0033] This invention also provides a method for forming ultra-low inclusion stainless steel EP tubes, comprising the following steps: S1. Start each servo motor according to the specifications of the ultra-low inclusion stainless steel EP tube to be formed, and adjust the working gap of the straightening component 2 and the forming component respectively to put the equipment in the forming preparation state, specifically: Start servo motor 1 (27), servo motor 2 (44), and servo motor 3 (48) to reset each actuator to its origin; based on the outer diameter, wall thickness, and forming accuracy requirements of the ultra-low inclusion stainless steel EP tube to be processed, pre-set the straightening pressure, guide gap, and forming reduction amount.

[0034] Servo motor 27 drives threaded rod 23 to rotate, causing upper slider 24 and lower slider 25 to move synchronously in opposite directions, thereby adjusting the roller pressure gap between upper straight roller 21 and lower straight roller 22; servo motor 48 drives threaded rod 47 to rotate, causing two moving blocks 46 to move synchronously inward or outward, completing the position adjustment of the two extrusion rollers 42 on both sides, so that the three sets of extrusion rollers form a forming channel of corresponding specifications.

[0035] S2. The steel pipe is fed into the straightening assembly 2, where the upper and lower straightening rollers 22 alternately press and straighten the steel pipe continuously, eliminating bending deformation and improving straightness. Specifically: The stainless steel EP pipe to be formed is fed into the straightening assembly 2 from one side of the guide frame 5, so that the steel pipe passes between two sets of upper straightening rollers 21 and two sets of lower straightening rollers 22 in sequence.

[0036] Because the upper straight roller 21 and the lower straight roller 22 have different rolling radii, the steel pipe is subjected to alternating bending action during transportation, which can gradually eliminate bending deformation, residual stress and local wavy defects generated during transportation, rolling and cutting, so that the steel pipe axis can be restored to the predetermined straight state.

[0037] During the straightening process, the upper straightening roller 21 can move up and down along the first guide groove 51, and the lower straightening roller 22 can move synchronously along the second guide groove 52, so that the upper straightening roller 21 and the lower straightening roller 22 always maintain uniform clamping pressure, avoiding excessive local force that could cause indentations on the surface of the steel pipe.

[0038] S3. After straightening, the steel pipe enters the guide assembly 3, where it is guided and positioned by the limiting action of the guide sleeve 32, ensuring the stable entry of the steel pipe into the forming area. Specifically: After straightening, the steel pipe continues to enter guide assembly 3.

[0039] The steel pipe passes through the guide hole formed by the center of the two guide sleeves 32 in sequence. Under the constraint of the guide hole, the radial position of the steel pipe is repositioned, and the lateral swing and displacement of the steel pipe are restricted. This keeps the central axis of the steel pipe consistent with the central axis of the forming component 4, thereby improving the subsequent forming accuracy.

[0040] Since the diameter of the guide hole is slightly larger than the outer diameter of the steel pipe, it can ensure that the steel pipe passes through smoothly, while avoiding the surface quality of the EP pipe being affected by excessive friction.

[0041] S4. Drive the two extrusion rollers on both sides to move synchronously according to the steel pipe specifications, and adjust the forming gap between the three sets of extrusion rollers to meet the forming requirements. Specifically: Before the steel pipe enters the forming component 4, the position of the forming roller is further fine-tuned according to the specifications of the steel pipe.

[0042] Servo motor 3 48 drives threaded rod 2 47 to rotate. The two reverse threads of threaded rod 2 47 drive two moving blocks 46 to move synchronously, so that the two side extrusion rollers 2 42 move closer or further away from the middle extrusion roller 1 41, thereby adjusting the forming space formed between the three rollers.

[0043] By synchronously adjusting the positions of the two extrusion rollers, the three sets of extrusion rollers are made to form a uniform force state, ensuring that the steel pipe is subjected to consistent force in all directions when it enters the forming zone.

[0044] S5. Drive the extrusion rollers to rotate continuously, so that the steel pipe completes roundness correction and dimensional shaping under the combined extrusion action of the three sets of extrusion rollers, specifically: Start the servo motor 44 to drive the rotating rod 43 and the intermediate extrusion roller 41 to rotate continuously, while the steel pipe is continuously fed in along the axial direction.

[0045] After the steel pipe enters the three-roll forming area composed of extrusion roller 41 and two extrusion rollers 42 on both sides, it gradually completes roundness correction, size shaping and uniform pressing of the outer surface under the joint action of the three sets of extrusion rollers.

[0046] Because the three sets of extrusion rollers form a ring-shaped extrusion structure, the force is more uniform at all positions on the outer circumference of the steel pipe, which can reduce local plastic deformation, improve the roundness consistency and wall thickness uniformity of the steel pipe, and at the same time reduce the new residual stress generated during processing.

[0047] S6. The continuously output equipment will complete the entire forming process of the formed ultra-low inclusion stainless steel EP tube, specifically as follows: As the steel pipe is continuously transported forward, it passes through the entire forming area.

[0048] The straightening component 2 continuously eliminates the bending deformation of the subsequent steel pipe, the guiding component 3 continuously keeps the steel pipe axis stable, and the forming component 4 continuously completes the outer circle shaping, so that the entire steel pipe maintains a consistent forming quality.

[0049] Once the tail end of the steel pipe has completely passed through forming component 4, each servo motor stops running, completing the forming process of the entire ultra-low inclusion stainless steel EP pipe.

[0050] Therefore, the present invention adopts the above-mentioned ultra-low inclusion stainless steel EP pipe forming equipment and forming method, which continuously integrates the straightening, guiding and forming processes to realize the continuous processing of ultra-low inclusion stainless steel EP pipe, improves forming efficiency and processing quality, and provides pipes with stable dimensions and good surface quality for subsequent electrolytic polishing processes.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A forming equipment for ultra-low inclusion stainless steel EP pipes, characterized in that: The system includes a base, on which a straightening assembly, a guiding assembly, and a forming assembly are sequentially arranged. A guide frame is fixedly arranged on the outer side of the straightening assembly, and the guide frame is fixedly arranged above the base. The straightening assembly includes upper straightening rollers and lower straightening rollers, and there are two of each type. The upper straightening rollers are arranged above the lower straightening rollers. An upper slider is arranged between the two upper straightening rollers, and each upper straightening roller is rotatably connected to the upper slider via a roller shaft one. A lower slider is arranged between the two lower straightening rollers, and each lower straightening roller is rotatably connected to the lower slider via a roller shaft two.

2. The ultra-low inclusion stainless steel EP tube forming equipment according to claim 1, characterized in that: The straightening assembly also includes a threaded rod, the upper slider and the lower slider are symmetrically arranged on the threaded rod, and the threaded rod has two reverse threads symmetrically arranged on it. The upper slider and the lower slider are respectively helically connected to the two reverse threads.

3. The ultra-low inclusion stainless steel EP tube forming equipment according to claim 2, characterized in that: The threaded rod has a limit plate and a servo motor respectively fixed at its top and bottom ends through the guide frame. The threaded rod is rotatably connected to the guide frame. The base has a mounting groove, and the servo motor is installed in the mounting groove.

4. The ultra-low inclusion stainless steel EP tube forming equipment according to claim 3, characterized in that: The guide frame is provided with guide groove one and guide groove two on both sides.

5. The ultra-low inclusion stainless steel EP tube forming equipment according to claim 4, characterized in that: The other end of the first roller shaft passes through the upper straight roller and the guide groove in sequence and is fixedly connected to a drive wheel. The first roller shaft is fixedly connected to the upper straight roller. The other end of the second roller shaft passes through the lower straight roller and the guide groove in sequence and is fixedly connected to a limit plate. The second roller shaft is fixedly connected to the lower straight roller.

6. The ultra-low inclusion stainless steel EP tube forming equipment according to claim 1, characterized in that: The guiding component includes a guide seat, and guide sleeves are symmetrically arranged inside the guide seat, with a guide hole formed at the center of the guide sleeve.

7. The ultra-low inclusion stainless steel EP tube forming equipment according to claim 1, characterized in that: The base has a groove, and a fixing plate is fixedly installed above the groove.

8. The ultra-low inclusion stainless steel EP tube forming equipment according to claim 7, characterized in that: The molding assembly includes an extrusion roller one and an extrusion roller two. The extrusion roller one is mounted above the base via a rotating rod one. A servo motor two is fixedly mounted at the bottom of the rotating rod one. The servo motor two is fixedly mounted above the fixed plate. The extrusion roller two is symmetrically arranged on both sides of the extrusion roller one. A rotating rod two is fixedly mounted below the extrusion roller two. A moving block is rotatably connected below the rotating rod two.

9. The ultra-low inclusion stainless steel EP tube forming equipment according to claim 8, characterized in that: The movable block is slidably connected to the groove. A threaded rod is threadedly connected to the middle of the movable block. Two reverse threads are provided on the threaded rod. The two movable blocks are respectively helically connected to the two reverse threads. One end of the threaded rod passes through the base and is fixedly connected to a servo motor.

10. A method for forming ultra-low inclusion stainless steel EP pipes, applied to the ultra-low inclusion stainless steel EP pipe forming equipment as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Start each servo motor according to the specifications of the ultra-low inclusion stainless steel EP tube to be formed, and adjust the working gap of the straightening component and the forming component respectively to put the equipment in the forming preparation state. S2. The steel pipe is fed into the straightening assembly, and the steel pipe is continuously straightened by alternating rolling of the upper and lower straightening rollers. S3. After straightening, the steel pipe enters the guide assembly and is guided and positioned under the limiting action of the guide sleeve to ensure that the steel pipe enters the forming area stably. S4. Drive the two extrusion rollers on both sides to move synchronously according to the steel pipe specifications, and adjust the forming gap between the three sets of extrusion rollers to meet the forming requirements. S5. Drive the extrusion rollers to rotate continuously, so that the steel pipe can complete the roundness correction and dimensional shaping under the joint extrusion action of the three sets of extrusion rollers; S6. The equipment continuously outputs the formed ultra-low inclusion stainless steel EP tubes, completing the entire forming process.

Images