Titanium alloy straight-beaded pipe reinforcing special equipment

Abstract

This invention relates to a special equipment for trimming straight ribs on titanium alloy strips, comprising a core rod fixing mechanism, a fixed guide mechanism, a housing, trimming rollers, and a drive mechanism. The core rod fixing mechanism, the fixed guide mechanism, and the housing are arranged sequentially on the same straight line. Three sets of trimming rollers are evenly distributed transversely inside the housing, each set including two symmetrically arranged rollers arranged vertically. The bore radius, groove width, and depth of the three sets of trimming rollers represent the upper, middle, and lower limits of the dimensional requirements specified in the technical specifications, respectively. The centerlines of the core rod fixing mechanism and the fixed guide mechanism, as well as the centerlines of the bores of the three sets of trimming rollers, coincide. The drive mechanism is located on one side of the housing and connected to the trimming rollers. This invention targets titanium alloy strips with special requirements. Without affecting the base circle portion, it only performs dimensional and transition arc shaping on the width and the transition portion intersecting with the base circle of the straight ribs on the outer circle of the titanium tube to meet extremely stringent requirements for rib dimensional accuracy.

Description

Technical Field

[0001] This invention relates to the field of micro-deformation pressure processing technology, and in particular to a special equipment for repairing straight ribs on titanium alloy strips. Background Technology

[0002] In the field of titanium alloy tubes, especially in nuclear power, ribbed tubes are often used in the secondary heat exchange section. Due to the harsh environment of high temperature and high pressure, the dimensional accuracy of the base circle is critical, and the morphology and dimensions of the ribs are subject to even stricter requirements. The morphology and dimensions of the ribs in the rolled titanium tubes often fail to meet the technical requirements in one go, necessitating adjustments to the ribs. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a special device for trimming straight ribs on titanium alloy tubes. For titanium alloy tubes with special requirements, without affecting the base circle portion, the device only shapes the width of the straight ribs on the outer circle of the titanium tube and adjusts the size and transition arc of the transition portion where the ribs intersect with the base circle to meet the extremely strict requirements for rib dimensional accuracy.

[0004] The technical solution adopted in this invention is as follows:

[0005] This invention proposes a special device for trimming straight ribbed titanium alloy tubes, comprising a core rod fixing mechanism, a fixing and guiding mechanism, a housing, trimming rollers, and a driving mechanism. The core rod fixing mechanism, the fixing and guiding mechanism, and the housing are arranged sequentially and evenly on the same straight line. Three sets of trimming rollers are evenly distributed laterally inside the housing, each set including two trimming rollers arranged symmetrically at the top and bottom. The bore radius, groove width, and depth of the three sets of trimming rollers are the upper, middle, and lower limits of the dimensional requirements in the technical specifications, respectively. The center lines of the core rod fixing mechanism and the fixing and guiding mechanism, as well as the center lines of the bores of the three sets of trimming rollers, coincide. The driving mechanism is located on one side of the housing and connected to the trimming rollers.

[0006] Furthermore, the fixed guide mechanism consists of three sets of transmission rollers arranged vertically and vertically, and the center line of each set of transmission rollers coincides with the center line of the trimming roll die.

[0007] Furthermore, the drive roller is a 120° V-shaped PVC drive roller.

[0008] Furthermore, the horizontal transverse wrapping spacing between each set of drive rollers is the upper limit of the technical requirements for the outer edge diameter of the straight rib tube.

[0009] Furthermore, the outlet end of the box is provided with a material discharge support mechanism.

[0010] Furthermore, the discharge support mechanism is composed of multiple sets of evenly distributed V-shaped conveying rollers, and the height of the conveying rollers is such that after supporting the straight rib tube, the center line of the straight rib tube coincides with the center line of the rib-repairing roller hole.

[0011] Furthermore, oil spray nozzles are installed at the inlet of the three sets of trimming rolls.

[0012] Furthermore, the drive mechanism includes an electrical control cabinet, a speed regulator, transmission gears, and transmission motors; three transmission motors are provided, each horizontally fixed to the outer bottom of the housing and corresponding one-to-one with the three trimming rollers located on the lower side, and the output end of the transmission motor is connected to the rotation shaft of the trimming roller; the electrical control cabinet is located on one side of the housing and connected to the transmission motors, and the speed regulator is located on the electrical control cabinet for adjusting the speed of the transmission motors; the transmission gears are coaxially fixed on the rotation shaft of each trimming roller, and the transmission gears on the upper and lower trimming rollers of the same group mesh with each other.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] This invention addresses the specific requirements of titanium alloy tubes with straight ribs. Without deforming the base circle, it shapes only the width, dimensions, and transition arc of the four straight ribs on the outer circumference of the titanium tube, meeting extremely stringent rib dimensional accuracy requirements. Furthermore, because the deformation process utilizes a roller mold and active drive, scratches on the outer surface of the base circle and the sides of the ribs are avoided after rib trimming. Moreover, the titanium tube with straight ribs does not need to be headed before trimming, avoiding a 10% loss in overall yield and resulting in significant economic benefits. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a special equipment for repairing straight ribs on titanium alloy strips proposed in this invention.

[0016] Figure 2 This is a top view of the structure of the present invention;

[0017] Figure 3 for Figure 1 A magnified schematic diagram of the central part of the structure;

[0018] Figure 4 for Figure 3 A top-view structural diagram;

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the trimming roll;

[0020] Figure 6 This is a schematic diagram showing the required dimensions of the reinforced pipe cross-section;

[0021] Figure 7 This is a schematic diagram of the chip head structure.

[0022] In the attached drawings, the following labels are used: 1-transmission gear; 2-core rod; 3-reinforcing roller; 4-transmission motor; 5-box; 6-transmission roller; 7-conveying roller; 8-electrical control cabinet; 9-core rod fixing mechanism; 10-ribbed straight tube workpiece; 11-speed regulator. Detailed Implementation

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] It should be noted that in the description of this invention, the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not mean that the device or element must have a specific orientation, or be constructed and operated in a specific orientation.

[0025] See appendix Figures 1 to 6 This paper presents a specific structure of an embodiment of a special device for trimming straight ribbed titanium alloy tubes proposed in this invention. The device includes a core rod fixing mechanism 9, a fixing and guiding mechanism, a housing 5, trimming rollers 3, and a driving mechanism.

[0026] In this embodiment, the core rod fixing mechanism 9, the fixing guide mechanism, and the housing 5 are arranged evenly on the same straight line from left to right. Inside the housing 5, three sets of trimming rollers 3 are evenly distributed from left to right, each set including two symmetrically arranged trimming rollers 3. The bore shape of the three sets of trimming rollers 3 corresponds to the cross-sectional shape of the workpiece 10 with straight ribs, and from left to right, they are the first set of trimming rollers 3, the second set of trimming rollers 3, and the third set of trimming rollers 3. The bore radius, groove width, and depth of the first set of trimming rollers 3, the second set of trimming rollers 3, and the third set of trimming rollers 3 are respectively defined by technical conditions. The upper, middle, and lower limits of the required dimensions are used to trim the upper and lower straight ribs in one go. After trimming the ribs in the upper and lower directions, the tube is rotated 90° and the other two straight ribs are trimmed. The active driving force of the trimming roll 3 is driven by a reduced-speed motor, which transmits the power to the three sets of trimming rolls 3 through gears, thereby realizing the biting and trimming of the straight tube workpiece 10 with ribs. Oil spray nozzles are installed at the inlet of the three sets of trimming rolls 3. During trimming, mill oil is sprayed from the oil spray nozzles to lubricate the rolls and the tube with straight ribs, preventing new scratches on the base circle and both sides of the ribs due to trimming. This rolling oil can be recycled through a filtration and circulation device. Before trimming, mill oil is manually applied to the inner wall of the tube with straight ribs to keep the inner surface lubricated and prevent new scratches from appearing on the inner surface after trimming.

[0027] This invention can complete the trimming of straight ribs from beginning to end of the tube without needing to trim the first 300mm section, thus avoiding material loss and improving the yield rate.

[0028] The center lines of the core rod fixing mechanism 9 and the fixing guide mechanism, as well as the center lines of the three sets of trimming rollers 3, coincide; the driving mechanism is located on one side of the outer side of the housing 5 and is connected to the trimming rollers 3.

[0029] The fixed guiding mechanism consists of three sets of vertically arranged transmission rollers 6, which mainly guide and maintain the horizontal and vertical center lines of the workpiece 10 with straight ribs. The center line of each set of transmission rollers 6 coincides with the center line of the hole of the trimming roller 3. In this embodiment, the transmission rollers 6 are 120° V-shaped PVC transmission rollers. The horizontal lateral wrapping distance between each set of transmission rollers 6 is the upper limit of the technical conditions for the outer diameter of the rib of the workpiece 10 with straight ribs.

[0030] In this embodiment, a discharge support mechanism is also provided at the right outlet end of the box 5. The discharge support mechanism is composed of multiple sets of evenly distributed V-shaped conveying rollers 7, and the height of the conveying rollers 7 is such that after supporting the straight rib tube workpiece 10, the center line of the straight rib tube workpiece 10 coincides with the center line of the hole of the trimming roller 3.

[0031] The drive mechanism includes an electrical control cabinet 8, a speed regulator 11, transmission gears 1, and transmission motors 4. In this embodiment, three transmission motors 4 are provided, each horizontally fixed to the outer bottom of the housing 5, corresponding one-to-one with the three trimming rollers 3 located on the lower side, and the output end of the transmission motor 4 is connected to the rotation shaft of the corresponding trimming roller 3; the electrical control cabinet 8 is located on one side of the housing 5 and connected to the transmission motors 4, and the speed regulator 11 is located on the electrical control cabinet 8 for adjusting the speed of the transmission motors 4; the transmission gears 1 are coaxially fixed on the rotation shaft of each trimming roller 3, and the transmission gears 1 on the upper and lower trimming rollers 3 of the same group mesh with each other. After the three groups of transmission motors 4 are reduced in speed by a reducer and distributed by the transmission gears 1, the speed is transmitted from the inlet to the outlet to the three groups of trimming rollers 3 according to the longitudinal linear velocity ratio of 1:1.005:1.010, so that the speed of the three groups of trimming rollers 3 is increased to a certain extent, so as to keep the flow rate volume of the straight-ribbed tube workpiece 10 between the three groups of trimming rollers 3 constant.

[0032] The invention also includes a core rod 2, which is used in conjunction with the repair process. The front end of the core rod 2 is connected to a core head via a threaded connection. Before repair, the core head passes sequentially through three sets of drive rollers 6 and three sets of trimming rollers 3, and is located in the inner hole of the third set of trimming rollers 3. The diameter of the core head is the lower limit of the inner hole diameter specified in the technical specifications, Φ9.90mm, and its length is 30.00mm. The core rod 2 is kept in a stable position by passing sequentially through the three sets of drive rollers 6. The core rod 2 has a diameter of Φ8.00mm and a length of 3.00mm. The tail end of the core rod 2 is fixed in the core rod fixing mechanism 9. The function of the core head is to prevent significant deformation of the base circle during the operation of the third set of trimming rollers 3. The principle is that the hole shape of the third set of trimming rollers 3 is the lower limit of the technical specifications, which minimizes the impact of the hole shape on the base circle during trimming. Furthermore, because the inner circle is supported by the core head, the deformation of the base circle can be controlled within a certain range to meet the final finished product dimensions.

[0033] Before trimming the ribs, the inner surface of the approximately 2.7m long straight rib tube workpiece 10 is coated with rolling mill oil. The mandrel is then sent to the corresponding position of the third set of trimming rollers 3 via the drive roller 6. The 2.7m long straight rib tube workpiece 10 is then inserted, and the tail end of the mandrel is fixed by the mandrel fixing mechanism 9. The straight rib tube workpiece 10 is manually passed through the three sets of drive rollers 6 in sequence, and the drive motors 4 of the three sets of trimming rollers 3 are turned on. The direction is adjusted so that the trimming rollers 3 bite into the straight rib tube workpiece 10. The straight rib tube workpiece 10 passes through the three sets of trimming rollers 3 in sequence, completing the trimming of the two ribs in one direction. Then, it is rotated 90° and the above process is repeated to complete the trimming of the other two ribs.

[0034] During the rib trimming process, since the hole shape and groove size of the third set of rib trimming rollers 3 are the lower limit of the corresponding technical conditions after the trimming is completed, the width of the rib will have a springback after the trimming is completed. Finally, the shape and size of the rib fully meet the requirements of the technical conditions, while the size of the base circle remains basically unchanged.

[0035] After the ribs are trimmed, the workpiece 10 with straight ribs is degreased before proceeding to the next step.

[0036] All matters not covered in this invention are common knowledge.

[0037] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A special equipment for repairing straight ribs on titanium alloy tubes, characterized in that: The equipment includes a core rod fixing mechanism, a fixing guide mechanism, a housing, trimming rollers, and a drive mechanism. The core rod fixing mechanism, the fixing guide mechanism, and the housing are arranged evenly in a straight line. Three sets of trimming rollers are evenly distributed laterally inside the housing, each set including two trimming rollers arranged symmetrically at the top and bottom. The die radius, groove width, and depth of the three sets of trimming rollers are the upper, middle, and lower limits of the dimensional requirements in the technical specifications, respectively. The center lines of the core rod fixing mechanism and the fixing guide mechanism, as well as the center lines of the die profiles of the three sets of trimming rollers, coincide. The drive mechanism is located on one side of the housing and connected to the trimming rollers. The drive mechanism includes an electrical control cabinet, a speed regulator, transmission gears, and transmission motors. Three transmission motors are installed, each horizontally fixed to the outer bottom of the housing and corresponding to one of the three trimming rollers located on the lower side. The output end of each transmission motor is connected to the rotation shaft of the trimming roller. The electrical control cabinet is located on one side of the housing and connected to the transmission motors. The speed regulator is mounted on the electrical control cabinet and used to adjust the speed of the transmission motors. The transmission gears are coaxially fixed to the rotation shafts of each trimming roller, and the transmission gears on the upper and lower trimming rollers of the same group mesh with each other. After the three sets of drive motors are reduced in speed by the reducer and distributed by the transmission gears, the rotational speed is transmitted from the inlet to the outlet to the three sets of trimming rolls according to the longitudinal linear speed ratio of 1:1.005:1.

010. This increases the rotational speed of the three sets of trimming rolls, so as to keep the flow rate and volume of the workpiece with straight ribs constant between the three sets of trimming rolls.

2. The special equipment for repairing straight ribs on titanium alloy tubes according to claim 1, characterized in that: The fixed guide mechanism consists of three sets of transmission rollers arranged vertically and vertically, and the center line of each set of transmission rollers coincides with the center line of the trimming roll die.

3. The special equipment for repairing straight ribs on titanium alloy tubes according to claim 2, characterized in that: The drive roller is a 120° V-shaped PVC drive roller.

4. The special equipment for repairing straight ribs on titanium alloy tubes according to claim 3, characterized in that: The horizontal transverse wrapping spacing between each set of drive rollers is the upper limit of the technical requirements for the outer edge diameter of the straight rib tube.

5. The special equipment for repairing straight ribs on titanium alloy tubes according to claim 1, characterized in that: The outlet end of the box is equipped with a material discharge support mechanism.

6. The special equipment for repairing straight ribs on titanium alloy tubes according to claim 5, characterized in that: The discharge support mechanism consists of multiple sets of evenly distributed V-shaped conveying rollers, and the height of the conveying rollers is such that after supporting the straight rib tube, the center line of the straight rib tube coincides with the center line of the rib-repairing roller die.

7. The special equipment for repairing straight ribbed titanium alloy tubes according to claim 1, characterized in that: Oil spray nozzles are installed at the inlet of the three sets of trimming rolls.

Images