Preparation equipment and preparation method of titanium alloy pipe

Abstract

The invention is suitable for the technical field of titanium alloy pipe preparation, and particularly relates to titanium alloy pipe preparation equipment and a preparation method thereof.The titanium alloy pipe preparation equipment comprises a first workbench, the side face of the first workbench is connected with a second workbench, a gear motor is installed on the surface of the first workbench, and a reduction gearbox is arranged on the surface of the first workbench; and the interior of the reduction gearbox is connected with a driving rod. The precision problem of the titanium alloy pipe blank in the reducing and straightening process can be effectively solved, and the production efficiency and the finished product quality are remarkably improved. Through the innovative design of the finishing roller and the arrangement of the gradually-reduced outer arc surface, the characteristic that the outer diameter of the perforated pipe blank is not uniform can be accurately adapted, it is ensured that the outer diameter of the pipe blank is uniformly reduced in the finishing process, and finally the regular circular outer diameter is formed. By means of the design, the pipe blank can be subjected to all-directional finishing in multiple directions, the quality defect caused by uneven outer diameter of the pipe blank is avoided, and it is ensured that the appearance and size of the pipe meet the high-precision requirement.

Description

Technical Field

[0001] The invention relates to the technical field of titanium alloy pipe preparation, in particular to a titanium alloy pipe preparation device and a preparation method thereof. Background Art

[0002] The existing preparation method of titanium alloy pipes mainly includes multiple steps such as ingot casting, forging, perforation, diameter reduction and straightening, and grinding. Among them, perforation and diameter reduction and straightening are key process links, which directly affect the outer diameter accuracy, roundness and surface quality of titanium alloy pipes. In the traditional diameter reduction and straightening process, the outer diameter of the titanium alloy tube blank is usually uneven after high-temperature perforation, especially the tube blank after perforation often undergoes thermal deformation during the cooling process, resulting in unstable outer diameter. The existing technology generally uses a simple finishing roller to reduce the diameter of the tube blank, but because the outer arc surface of the finishing roller is too single, it is difficult to adapt to tube blanks with different outer diameters, and there is a lack of temperature control and precision adjustment for the high-temperature tube blank, which may cause the outer diameter of the tube blank to be uneven, affecting the quality and accuracy of the finished product.

[0003] Most existing finishing roller equipment adopts fixed structure and standardized size. The finishing process relies on manual adjustment or simple mechanical control, and it is impossible to achieve full finishing when the tube size is uneven. Especially for titanium alloy tubes that have just completed the piercing operation and are in a high temperature state, due to the irregular outer diameter of the tube and the deformation problem under high temperature, the existing finishing technology is difficult to ensure the uniformity and stability of the outer diameter. In this process, the adjustment of the finishing roller is difficult, and it usually takes a long process time to complete the diameter reduction and straightening, resulting in low production efficiency and the quality of the finished product often fluctuates. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a titanium alloy pipe preparation device and a preparation method thereof, aiming to solve the technical problems mentioned in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A titanium alloy pipe preparation device comprises a first workbench, and a second workbench is connected to the side of the first workbench, a reduction motor is installed on the surface of the first workbench, and a reduction box is arranged on the surface of the first workbench, and a driving rod is connected to the inside of the reduction box;

[0007] A plurality of first universal joints are installed on the surface of the first workbench, a first transmission rod is connected inside the first universal joint, a plurality of first support panels are connected on both sides of the surface of the second workbench, and a first rolling bearing is installed on the surface of the first support panel, a first rotating rod is rotatably connected inside the first rolling bearing, and a first horizontal finishing roller is arranged at one end of the first rotating rod, a plurality of first mounting seats are arranged on both sides of the surface of the second workbench, a first driving member is installed inside the first mounting seat, and a first vertical finishing roller is installed at the output end of the first driving member;

[0008] A second universal joint is installed on the surface of the first workbench, and a linkage rod is commonly connected between two adjacent first universal joints and between the first universal joint and the second universal joint, a second transmission rod is connected inside the second universal joint, second support panels are arranged on both sides of the surface of the second workbench, and second rolling bearings are installed on the sides of the second support panels, the second rolling bearings are internally rotatably connected to a second rotating rod, a second horizontal finishing roller is installed at one end of the second rotating rod, second mounting seats are arranged on both sides of the surface of the second workbench, a second driving member is installed inside the second mounting seat, and a second vertical finishing roller is installed at the output end of the second driving member.

[0009] Furthermore, the output end of the reduction motor is connected to the interior of the reduction box, one end of the driving rod is connected to the interior of the reduction box, and the other end of the driving rod is connected to the interior of the first universal joint.

[0010] Furthermore, a plurality of first transverse finishing rollers and a plurality of first vertical finishing rollers are arranged on the second workbench in a cross-arrangement.

[0011] Furthermore, the curvature of the outer arc surface of the plurality of first transverse finishing rollers is greater than the curvature of the outer arc surface of the second transverse finishing roller, and the curvature of the outer arc surface of the plurality of first transverse finishing rollers gradually decreases from the direction away from the second transverse finishing roller to the direction close to the second transverse finishing roller;

[0012] The curvature of the outer arc surface of several first vertical finishing rollers is greater than the curvature of the outer arc surface of the second vertical finishing roller, and the curvature of the outer arc surface of several first vertical finishing rollers gradually decreases from the direction away from the second vertical finishing roller to the direction close to the second vertical finishing roller.

[0013] Furthermore, the outer arc surfaces of the second vertical finishing roller and the second horizontal finishing roller are both regular semicircles, and the arcs of the two are the same, and they form a complete circle after being spliced.

[0014] Furthermore, a method for preparing a titanium alloy pipe comprises the following steps:

[0015] S1: Selecting titanium sponge of predetermined specifications as raw material, and performing vacuum melting on it to obtain an ingot;

[0016] S2, forging the ingot at a forging temperature of 1020 degrees Celsius, and obtaining a rough rod through a process of blanking and forging;

[0017] S3. Use a sawing machine to cut the rough rod, ensure that both ends are flat and burrs are removed, remove the oxide layer on the surface of the rough rod by turning, and drill a centering hole on its end face;

[0018] S4, heating the processed rough rod, controlling the temperature at 910 degrees Celsius, keeping the temperature for 1.5 hours, sending the rough rod into a resistance furnace for segmented heating, and using a 76 punching machine to perform a punching operation to obtain a tube blank;

[0019] S5, sending the perforated tube blank in a high temperature state into a titanium alloy tube preparation device for diameter reduction and straightening treatment;

[0020] S6. Grind the tube blank after diameter reduction and straightening to remove defects and ensure smooth transition at the grinding point;

[0021] S7. Flatten the ground tube blank, flatten the two ends of the tube blank on a lathe, and simultaneously perform boring processing to remove inner hole defects, and perform outer circle processing to obtain a titanium alloy tube.

[0022] Furthermore, in step S1, the titanium sponge of predetermined specifications is titanium sponge with a purity reaching Grade 1 standard.

[0023] Furthermore, in step S4, when the punching operation is performed, the forward extension of the plug is 42 mm, that is, the forward extension distance of the plug of the 76 punching machine relative to the machine base is 42 mm.

[0024] Furthermore, in step S5, the specific implementation process of the diameter reduction and straightening treatment of the tube blank in the high temperature state is as follows:

[0025] First, place the large-diameter end of the perforated and high-temperature tube blank on the first horizontal finishing roller on the leftmost side of the second workbench, and ensure that the tube blank is placed horizontally. Then start the reduction motor, and transmit power through the driving rod and the universal joint, so that the first horizontal finishing roller, the first vertical finishing roller, the second vertical finishing roller and the second horizontal finishing roller start to rotate synchronously.

[0026] When the tube blank begins to move along the finishing rollers, it first passes through a plurality of first horizontal finishing rollers and a first vertical finishing roller. Under the action of the outer arc surfaces of these finishing rollers, the outer diameter of the tube blank is gradually regularized and reduced, and the shape gradually approaches a circle.

[0027] As the tube billet continues to move forward and passes through the second horizontal finishing roller and the second vertical finishing roller, since the outer arc surfaces of the second horizontal finishing roller and the second vertical finishing roller are the same semicircular shape, this design ensures that the tube billet is finished more evenly and accurately in the final stage. Finally, after the tube billet is finished, its outer diameter meets the regular requirements to meet the specifications and is discharged smoothly.

[0028] Furthermore, in step S6, when the tube blank is ground, the ratio of the depth to the width of the grinding area is controlled within 1:6.

[0029] The present invention provides a titanium alloy pipe preparation device and a preparation method thereof, which have the following beneficial effects:

[0030] It can effectively solve the precision problem of titanium alloy tube billets during the process of reducing and straightening, and significantly improve production efficiency and finished product quality. Through the innovative finishing roller design, the gradually reduced outer arc surface setting can accurately adapt to the uneven outer diameter of the tube billet after perforation, ensuring that the outer diameter of the tube billet is uniformly reduced during the finishing process and finally forming a regular circular outer diameter. This design enables the tube billet to be fully finished in multiple directions, avoiding quality defects caused by uneven outer diameter of the tube billet, and ensuring that the appearance and size of the tube meet high-precision requirements.

[0031] In addition, the present invention can effectively process titanium alloy tubes that have just been pierced and are in a high temperature state, avoiding the problem of tube deformation in a high temperature state. In this process, the temperature of the tube is effectively controlled, and the finishing operation is performed within a suitable temperature range, thereby improving the finishing effect and ensuring the stability of the tube. This feature enables the tube to maintain a high dimensional accuracy after being processed by the finishing roller, and the quality of the final product is greatly improved.

[0032] The finishing equipment of the present invention has a reasonable structure, and through the coordinated action of multiple finishing rollers, it can efficiently complete the diameter reduction and straightening of the tube blank, reduce the repetitiveness of the process, and improve the overall efficiency of the production line. By synchronously driving multiple finishing rollers, the tube blank can quickly and stably complete the regularization and precision adjustment of the outer diameter when passing through the finishing roller group, thereby greatly improving the production efficiency.

[0033] In summary, the present invention not only improves the production efficiency of titanium alloy pipes, but also ensures the high quality of finished pipe products through optimized finishing roller design, reasonable operation process and efficient processing method, and has important industrial application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The present invention is a schematic diagram of the structure of a titanium alloy pipe preparation device.

[0035] Figure 2This is a schematic diagram of the structure of a titanium alloy pipe preparation device from a top view.

[0036] In the figure: 1. first workbench; 2. second workbench; 3. reduction motor; 4. reduction box; 5. driving rod; 6. first supporting panel; 7. first vertical finishing roller; 8. second vertical finishing roller; 9. first mounting seat; 10. second supporting panel; 11. second mounting seat; 12. first universal joint; 13. linkage rod; 14. second universal joint; 15. first transmission rod; 16. first horizontal finishing roller; 17. first rotating rod; 18. second transmission rod; 19. second horizontal finishing roller; 20. second rotating rod. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0039] like Figure 1-Figure 2 As shown, an embodiment of the present invention provides a titanium alloy pipe preparation device, which includes a first workbench 1, and a second workbench 2 is connected to the side of the first workbench 1, a reduction motor 3 is installed on the surface of the first workbench 1, and a reduction box 4 is arranged on the surface of the first workbench 1, and a driving rod 5 is connected to the inside of the reduction box 4.

[0040] A plurality of first universal joints 12 are installed on the surface of the first workbench 1 , the output end of the reduction motor 3 is connected to the interior of the reduction box 4 , one end of the drive rod 5 is connected to the interior of the reduction box 4 , and the other end of the drive rod 5 is connected to the interior of the first universal joint 12 .

[0041] The first transmission rod 15 is connected to the inside of the first universal joint 12, and a plurality of first support panels 6 are connected to both sides of the surface of the second workbench 2, and a first rolling bearing is installed on the surface of the first support panel 6. The first rolling bearing is rotatably connected to the inside of the first rotating rod 17, and a first horizontal finishing roller 16 is provided at one end of the first rotating rod 17.

[0042] A plurality of first mounting seats 9 are arranged on both sides of the surface of the second workbench 2, and a first driving member is installed inside the first mounting seat 9, and a first vertical finishing roller 7 is installed at the output end of the first driving member. A plurality of first horizontal finishing rollers 16 and a plurality of first vertical finishing rollers 7 are arranged on the second workbench 2 in a cross-arranged manner.

[0043] A second universal joint 14 is installed on the surface of the first workbench 1, and a linkage rod 13 is commonly connected between two adjacent first universal joints 12 and between the first universal joint 12 and the second universal joint 14. A second transmission rod 18 is connected inside the second universal joint 14. Second support panels 10 are arranged on both sides of the surface of the second workbench 2, and a second rolling bearing is installed on the side of the second support panel 10. The second rolling bearing is internally rotatably connected to a second rotating rod 20, and a second horizontal finishing roller 19 is installed at one end of the second rotating rod 20. Second mounting seats 11 are arranged on both sides of the surface of the second workbench 2, and a second driving member is installed inside the second mounting seat 11, and a second vertical finishing roller 8 is installed at the output end of the second driving member.

[0044] The curvature of the outer arc surface of the plurality of first transverse finishing rollers 16 is greater than the curvature of the outer arc surface of the second transverse finishing roller 19, and the curvature of the outer arc surface of the plurality of first transverse finishing rollers 16 gradually decreases from the direction away from the second transverse finishing roller 19 to the direction close to the second transverse finishing roller 19;

[0045] The curvature of the outer arc surface of the plurality of first vertical finishing rollers 7 is greater than the curvature of the outer arc surface of the second vertical finishing roller 8, and the curvature of the outer arc surface of the plurality of first vertical finishing rollers 7 gradually decreases from the direction away from the second vertical finishing roller 8 to the direction close to the second vertical finishing roller 8. The outer arc surfaces of the second vertical finishing roller 8 and the second horizontal finishing roller 19 are both regular semicircles, and the curvature of the two is the same, and a complete circle is formed after splicing.

[0046] In one embodiment of the present invention, the titanium alloy tube preparation equipment (also called finishing machine) of the present invention is specially designed for processing "titanium alloy tubes that have just completed the perforation operation and are still in a high temperature state", and is mainly used for diameter reduction and straightening and outer diameter regularization. It uses the synergistic effect of multiple finishing rollers to accurately reduce the diameter and finish the tube blank, and ultimately ensure that the outer diameter of the tube blank is uniform and round.

[0047] Each set of finishing rollers includes two vertical finishing rollers and one horizontal finishing roller. The vertical finishing rollers (such as the first vertical finishing roller 7 and the second vertical finishing roller 8) are responsible for clamping and conveying the tube blanks, and at the same time, they perform outer diameter finishing by rotating to ensure that the tube blanks are pushed forward in the direction of the required specifications. During the advancement of the tube blanks, they not only play a supporting role, but also can gradually regularize the outer diameter of the tube blanks to avoid uneven outer diameters.

[0048] The transverse finishing rollers (such as the first transverse finishing roller 16 and the second transverse finishing roller 19) are mainly responsible for holding up the tube and providing additional conveying and finishing functions. These transverse finishing rollers are located below the tube to ensure that the tube is always in the correct position and cooperate with the vertical finishing rollers to push the tube forward. The design of the transverse finishing rollers also focuses on the finishing effect. The outer arc surface cooperates with the vertical finishing rollers to ensure that the tube is continuously reduced and straightened during the conveying process.

[0049] The tube billet starts from the first horizontal finishing roller 16 and passes through multiple sets of finishing rollers to gradually reach a regular circular outer diameter. Each set of finishing rollers continuously adjusts the outer diameter of the tube billet to ensure that its shape is uniform and reaches the required specifications. In this process, the tube billet is not only clamped and pushed in the vertical direction, but also adjusted in the horizontal direction through the interaction of the finishing rollers, ensuring that the tube billet is finished in all directions, thereby eliminating any uneven outer diameter.

[0050] The specific working process of the titanium alloy tube preparation equipment is as follows: First, the large-diameter end of the titanium alloy tube blank that has just been pierced is placed on the first horizontal finishing roller 16 on the leftmost side of the second workbench 2, and the tube blank is kept horizontally placed. At this time, the reduction motor 3 is started, and the power is transmitted through the driving rod 5 and the universal joint, so that multiple finishing rollers (such as the first horizontal finishing roller 16, the first vertical finishing roller 7, the second vertical finishing roller 8, and the second horizontal finishing roller 19) start to rotate synchronously.

[0051] When the tube passes through the first transverse finishing roller 16, the outer diameter of the tube gradually begins to be regularized under the action of the outer arc surface of the finishing roller. At the same time, the first universal joint 12 rotates to drive the first transmission rod 15, the first rotating rod 17 and the first transverse finishing roller 16. The second universal joint 14 rotates to drive the second transmission rod 18 and the second rotating rod 20, and the second rotating rod 20 drives the rotation of the second transverse finishing roller 19. The coordinated action of these finishing rollers begins to reduce and finish the tube.

[0052] As the tube moves forward along the finishing rollers, the finishing rollers continuously regularize its outer diameter to ensure that the outer diameter decreases evenly and is gradually adjusted to a regular circle. The first vertical finishing roller 7 and the second vertical finishing roller 8 also begin to play a role. During the forward movement of the tube, through their rotation, not only the outer diameter of the tube is further reduced, but also the stable forward movement of the tube is ensured through the clamping action. Each set of finishing rollers (the first horizontal finishing roller 16, the first vertical finishing roller 7, the second vertical finishing roller 8, and the second horizontal finishing roller 19) is adjusted according to the current outer diameter of the tube, so that the tube is finished in multiple directions.

[0053] During the finishing process, the outer diameter of the tube gradually transitions from the larger end to the smaller end, and the curvature of the outer arc of each finishing roller gradually decreases from one end away from the tube to the other end close to the tube. This design is to adapt to the gradual change in the outer diameter of the tube that has just been pierced by the piercing machine. Through this gradually decreasing outer arc design of the finishing roller, the tube can be better finished to ensure that the outer diameter gradually reaches a uniform and regular state.

[0054] Finally, when the tube reaches the finishing position of the second horizontal finishing roller 19 and the second vertical finishing roller 8, since the outer arc surfaces of these two finishing rollers are the same semicircular shape, the tube is further finished and finally discharged with a regular circular outer diameter that meets the specification requirements.

[0055] This design is particularly suitable for processing titanium alloy tubes that have just been pierced and are still in a high temperature state. Since the outer diameter of the tube after piercing is usually uneven, with one end larger and the other end smaller, a fast and accurate finishing process is required. In conventional technology, if the tube is cooled and then heated for finishing, it may increase energy consumption and processing time, and affect the quality of the tube. The equipment provided by the present invention can perform finishing while the tube is kept at a high temperature, which not only improves production efficiency, but also avoids the energy consumption problem of secondary heating.

[0056] Compared with the prior art, the present invention has significant advantages, especially in the design and layout of the finishing rollers. By combining the vertical finishing rollers and the horizontal finishing rollers, it can effectively adapt to the different outer diameters of the tube blanks after perforation, and ensure the finishing effect by gradually reducing the curvature of the roller surface. Through this innovative design, the outer diameter regularity and dimensional consistency of the tube blanks are greatly improved, and the finishing process is more efficient and accurate.

[0057] In addition, the vertical finishing roller and the horizontal finishing roller can cooperate effectively in the whole finishing process to ensure that the tube billet is fully finished during the conveying process. This multi-directional adjustment ensures that the tube billet can be finished at different positions and angles, and finally achieves a perfect round outer diameter, greatly improving the yield rate and reducing the generation of waste.

[0058] like Figure 1 and Figure 2 As shown, a method for preparing a titanium alloy pipe provided by an embodiment of the present invention comprises the following steps:

[0059] S1: Selecting titanium sponge of predetermined specifications as raw material, and performing vacuum melting on it to obtain an ingot;

[0060] S2, forging the ingot at a forging temperature of 1020 degrees Celsius, and obtaining a rough rod through a process of blanking and forging;

[0061] S3. Use a sawing machine to cut the rough rod, ensure that both ends are flat and burrs are removed, remove the oxide layer on the surface of the rough rod by turning, and drill a centering hole on its end face;

[0062] S4, heating the processed rough rod, controlling the temperature at 910 degrees Celsius, keeping the temperature for 1.5 hours, sending the rough rod into a resistance furnace for segmented heating, and using a 76 punching machine to perform a punching operation to obtain a tube blank;

[0063] S5, sending the perforated tube blank in a high temperature state into a titanium alloy tube preparation device for diameter reduction and straightening treatment;

[0064] S6. Grind the tube blank after diameter reduction and straightening to remove defects and ensure smooth transition at the grinding point;

[0065] S7. Flatten the ground tube blank, flatten the two ends of the tube blank on a lathe, and simultaneously perform boring processing to remove inner hole defects, and perform outer circle processing to obtain a titanium alloy tube.

[0066] In this embodiment, the preparation method of the titanium alloy tube involves multiple key steps from the selection of titanium sponge raw material to the production of the final product.

[0067] First, titanium sponge that meets the predetermined specifications is selected as the raw material. The titanium sponge is subjected to precise vacuum melting treatment, and is heated to a high temperature and melted using an efficient vacuum melting furnace to finally obtain an ingot. Vacuum melting technology can effectively remove impurities in titanium alloys and ensure the purity and quality of the material.

[0068] Next, the ingot is forged at a temperature of 1020°C to ensure the mechanical properties of the titanium alloy. In this process, the ingot is first turned into a larger blank through a blanking operation, and then processed on a forging machine to obtain a blank rod with appropriate shape and size. The forging process can not only improve the grain structure of the titanium alloy, but also increase the density and strength of the material.

[0069] The rough rod is then cut using a sawing machine to ensure that both ends of the rough rod are flat and any burrs are removed. In order to remove the surface oxide layer, the rough rod is surface cleaned using a turning process. At the same time, a centering hole is punched on the end face of the rough rod to ensure accurate centering in subsequent processing. This process step is the basis for the smooth progress of the subsequent finishing process.

[0070] After the blanking and turning process, the rough rod is then heated. The rough rod is heated to 910°C and kept at this temperature for 1.5 hours to ensure uniform temperature inside the titanium alloy. Then, the rough rod enters the resistance furnace for segmented heating to gradually increase the temperature and make the internal temperature of the tube meet the perforation requirements. In this process, a 76 perforator is used to perform perforation operations to complete the initial forming of the titanium alloy tube and obtain a tube blank.

[0071] After being pierced and kept at high temperature, the tube is then sent to the titanium alloy tube finishing equipment for diameter reduction and straightening. This equipment uses a precise rolling system and transmission structure to adjust the relative position of the finishing rollers to perform all-round diameter reduction and straightening on the tube, gradually making the outer diameter of the tube regular, and at the same time making necessary shape adjustments to meet the needs of subsequent processing. The finishing process not only improves the shape accuracy of the tube, but also eliminates the stress that may be generated in the material during the piercing process.

[0072] After the tube is straightened and reduced in diameter, it enters the grinding process. The grinding machine removes the defects on the surface of the tube and ensures a smooth transition of the surface after grinding. The grinding process not only eliminates surface defects, but also maintains the strength and precision of the material, so that the surface of the tube meets the specified requirements. This step ensures the quality of the tube and prevents quality problems in subsequent processes.

[0073] After grinding, the tube enters the flattening process. The two ends of the tube are flattened using a lathe to ensure that the end faces of the tube are smooth and free of any defects. At the same time, the lathe also bores the inner hole of the tube to remove any defects that may exist in the inner hole. For the outer circle, the outer circle is further processed by the outer circle turning process to ensure that the outer diameter of the tube meets the specification requirements.

[0074] Finally, through the above process, titanium alloy pipes that meet the specification requirements are obtained. The entire preparation process applies existing forging technology, turning technology, perforation technology, finishing technology, grinding technology, etc., combined with advanced equipment and processes such as vacuum melting, precise temperature control heating, and mechanical processing to ensure the quality and precision of the final product.

[0075] In this embodiment, in step S1, the titanium sponge of predetermined specifications is titanium sponge with a purity reaching Grade 1 standard.

[0076] There are significant advantages to using sponge titanium with a purity of Grade 1 as raw material. First, high-purity sponge titanium contains very few impurities, which is crucial to the final performance of the titanium alloy. The low content of impurities such as iron, nitrogen, oxygen and other elements avoids their negative impact on the mechanical properties of titanium alloys and ensures that the products perform well in terms of strength, toughness, corrosion resistance and other aspects. The high purity of Grade 1 sponge titanium makes it more suitable for the manufacture of demanding titanium alloy pipes, especially in high-end applications such as aerospace, chemical equipment and medical fields, where its corrosion resistance and mechanical strength are particularly critical.

[0077] In addition, the use of grade 1 titanium sponge as raw material helps to optimize the stability of subsequent production processes. High-purity titanium materials are easier to control during smelting, forging and other processes, and can effectively avoid process fluctuations caused by impurities, ensuring the quality consistency of intermediate products such as ingots and rough rods, which is conducive to the smooth progress of subsequent processing, thereby improving production efficiency and yield rate. Finally, the use of grade 1 titanium sponge can ensure that titanium alloy pipes have long life and high reliability during use, meeting high quality standards.

[0078] In this embodiment, in step S4, when the punching operation is performed, the plug extension is 42 mm, that is, the plug of the 76 punching machine extends 42 mm relative to the machine base. This design parameter has important advantages. First, the setting of the plug extension ensures that the tube blank can be fully penetrated during the punching operation, and the shape and size of the inner hole of the tube blank can be effectively controlled. The appropriate extension can improve the penetration ability of the punching machine, making it easier to punch when processing high-temperature tube blanks, and reducing the jamming phenomenon or material deformation problems that may occur during the punching process.

[0079] In addition, the 42mm plug reach helps improve processing accuracy while ensuring the piercing effect. A reasonable reach distance can ensure the stability of the tube blank and avoid irregular or eccentric inner holes during the piercing process, thereby ensuring the quality and consistency of the final product. Too small a reach may not achieve the ideal penetration effect, while too large a reach may cause excessive processing force and cause unnecessary deformation of the tube blank. Therefore, the 42mm plug reach ensures the piercing quality and accuracy while also optimizing production efficiency and reducing waste and loss.

[0080] By precisely controlling the plug extension, this embodiment can effectively adjust and control the inner hole size of the tube blank during the piercing stage, ensure the smooth progress of subsequent processing, and lay a solid foundation for subsequent diameter reduction, straightening and grinding.

[0081] In this embodiment, in step S5, the specific implementation process of the diameter reduction and straightening treatment of the tube blank in a high temperature state is as follows:

[0082] In step S5, the specific implementation process of the tube blank in a high temperature state is as follows:

[0083] First, place the large-diameter end of the perforated and high-temperature tube blank on the first horizontal finishing roller 16 on the leftmost side of the second workbench 2, and ensure that the tube blank is placed horizontally. Then start the reduction motor 3, and transmit power through the driving rod 5 and the universal joint 12, so that the first horizontal finishing roller 16, the first vertical finishing roller 7, the second vertical finishing roller 8 and the second horizontal finishing roller 19 start to rotate synchronously.

[0084] When the tube blank begins to move along the finishing rollers, it first passes through a plurality of first transverse finishing rollers 16 and first vertical finishing rollers 7. Under the action of the outer arc surfaces of these finishing rollers, the outer diameter of the tube blank is gradually regularized and reduced, and the shape gradually approaches a circle.

[0085] As the tube billet continues to move forward and passes through the second horizontal finishing roller 19 and the second vertical finishing roller 8, since the outer arc surfaces of the second horizontal finishing roller 19 and the second vertical finishing roller 8 are the same semicircular shape, this design ensures that the tube billet is finished more evenly and accurately in the final stage. Finally, after the tube billet is finished, its outer diameter meets the regularity requirements to meet the specifications and standards and is discharged smoothly.

[0086] Furthermore, in step S6, when the tube blank is ground, the ratio of the depth to the width of the grinding area is controlled within 1:6.

[0087] In this embodiment, when the tube is ground in step S6, the ratio of the depth to the width of the grinding area is controlled within 1:6. Such a design has significant advantages. First, the control of the depth-to-width ratio can ensure that the surface treatment during the grinding process is uniform and stable. A smaller depth and a larger width ratio can avoid over-cutting, thereby reducing damage or uneven wear to the surface of the tube, and ensuring that the surface of the tube is smooth and flat. Too much depth may cause excessive cutting of the surface of the tube, affecting its geometry, and may even cause material waste. By controlling the depth-to-width ratio within 1:6, this problem can be effectively avoided, ensuring a smooth transition of the ground surface without affecting the strength and dimensional stability of the tube.

[0088] Secondly, the appropriate ratio of depth and width during the grinding process can also control the cutting force, making the grinding process smoother and reducing the impact of mechanical vibration on the tube, thereby improving processing accuracy and production efficiency. A reasonable depth-to-width ratio is not only conducive to ensuring the removal of surface defects on the tube, but also avoids excessive temperatures or processing errors caused by excessive cutting.

[0089] By strictly controlling the depth-to-width ratio, this embodiment can optimize the grinding effect, remove the oxide layer, defects or irregular textures that may exist on the surface of the tube blank, and provide a high-quality processing foundation for subsequent flat head processing and boring operations, thereby improving the quality and performance of the final titanium alloy tube.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A titanium alloy tube manufacturing device, comprising a first workbench (1), wherein a second workbench (2) is connected to the side of the first workbench (1), characterized in that: A reduction motor (3) is installed on the surface of the first workbench (1), and a reduction box (4) is arranged on the surface of the first workbench (1), and a driving rod (5) is connected to the interior of the reduction box (4); A plurality of first universal joints (12) are installed on the surface of the first workbench (1), and a first transmission rod (15) is connected inside the first universal joint (12); a plurality of first support panels (6) are connected on both sides of the surface of the second workbench (2), and a first rolling bearing is installed on the surface of the first support panel (6); a first rotating rod (17) is rotatably connected inside the first rolling bearing, and a first horizontal finishing roller (16) is provided at one end of the first rotating rod (17); a plurality of first mounting seats (9) are installed on both sides of the surface of the second workbench (2), and a first driving member is installed inside the first mounting seat (9), and a first vertical finishing roller (7) is installed at the output end of the first driving member; A second universal joint (14) is installed on the surface of the first workbench (1), and a linkage rod (13) is commonly connected between two adjacent first universal joints (12) and between the first universal joint (12) and the second universal joint (14); a second transmission rod (18) is connected inside the second universal joint (14); second support panels (10) are provided on both sides of the surface of the second workbench (2), and a second rolling bearing is installed on the side of the second support panel (10); a second rotating rod (20) is rotatably connected inside the second rolling bearing, and a second horizontal finishing roller (19) is installed at one end of the second rotating rod (20); second mounting seats (11) are provided on both sides of the surface of the second workbench (2), and a second driving member is installed inside the second mounting seat (11); and a second vertical finishing roller (8) is installed at the output end of the second driving member.

2. The titanium alloy pipe manufacturing equipment according to claim 1, characterized in that: The output end of the reduction motor (3) is connected to the interior of the reduction box (4), one end of the drive rod (5) is connected to the interior of the reduction box (4), and the other end of the drive rod (5) is connected to the interior of the first universal joint (12).

3. The titanium alloy pipe manufacturing equipment according to claim 1, characterized in that: A plurality of first transverse finishing rollers (16) and a plurality of first vertical finishing rollers (7) are arranged on the second workbench (2) in a cross-arranged manner.

4. The titanium alloy pipe manufacturing equipment according to claim 1, characterized in that: The curvature of the outer arc surface of the plurality of first transverse finishing rollers (16) is greater than the curvature of the outer arc surface of the second transverse finishing roller (19), and the curvature of the outer arc surface of the plurality of first transverse finishing rollers (16) gradually decreases from a direction away from the second transverse finishing roller (19) to a direction close to the second transverse finishing roller (19); The curvature of the outer arc surface of the plurality of first vertical finishing rollers (7) is greater than the curvature of the outer arc surface of the second vertical finishing roller (8), and the curvature of the outer arc surface of the plurality of first vertical finishing rollers (7) gradually decreases from the direction away from the second vertical finishing roller (8) to the direction close to the second vertical finishing roller (8).

5. The titanium alloy pipe manufacturing equipment according to claim 4, characterized in that: The outer arc surfaces of the second vertical finishing roller (8) and the second horizontal finishing roller (19) are both regular semicircles, and the arcs of the two are the same, and they form a complete circle after being spliced.

6. A method for preparing a titanium alloy pipe, characterized in that: The method comprises the following steps: S1: Selecting titanium sponge of predetermined specifications as raw material, and performing vacuum melting on it to obtain an ingot; S2, forging the ingot at a forging temperature of 1020 degrees Celsius, and obtaining a rough rod through a process of blanking and forging; S3. Use a sawing machine to cut the rough rod, ensure that both ends are flat and burrs are removed, remove the oxide layer on the surface of the rough rod by turning, and drill a centering hole on its end face; S4, heating the processed rough rod, controlling the temperature at 910 degrees Celsius, keeping the temperature for 1.5 hours, sending the rough rod into a resistance furnace for segmented heating, and using a 76 punching machine to perform a punching operation to obtain a tube blank; S5, sending the perforated tube blank in a high temperature state into the titanium alloy tube preparation equipment according to any one of claims 1 to 5 for diameter reduction and straightening treatment; S6. Grind the tube blank after diameter reduction and straightening to remove defects and ensure smooth transition at the grinding point; S7. Flatten the ground tube blank, flatten the two ends of the tube blank on a lathe, and simultaneously perform boring processing to remove inner hole defects, and perform outer circle processing to obtain a titanium alloy tube.

7. The method for preparing a titanium alloy tube according to claim 6, characterized in that: In step S1, the titanium sponge of predetermined specifications is titanium sponge with a purity reaching the first grade standard.

8. The method for preparing a titanium alloy tube according to claim 6, characterized in that: In step S4, when the punching operation is performed, the forward extension of the plug is 42 mm, that is, the forward extension distance of the plug of the 76 punching machine relative to the machine base is 42 mm.

9. The method for preparing a titanium alloy tube according to claim 6, characterized in that: In step S5, the specific implementation process of the tube blank in a high temperature state is as follows: First, the large-diameter end of the perforated and high-temperature tube blank is placed on the first horizontal finishing roller (16) on one side of the second workbench (2), and the tube blank is ensured to be placed horizontally. Then, the reduction motor (3) is started, and power is transmitted through the drive rod (5) and the universal joint (12), so that the first horizontal finishing roller (16), the first vertical finishing roller (7), the second vertical finishing roller (8) and the second horizontal finishing roller (19) start to rotate synchronously. When the tube blank begins to move along the finishing rollers, it first passes through a plurality of first transverse finishing rollers (16) and a first vertical finishing roller (7). Under the action of the outer arc surfaces of these finishing rollers, the outer diameter of the tube blank is gradually regularized and reduced, and the outer shape gradually approaches a circle. As the tube billet continues to move forward and passes through the second horizontal finishing roller (19) and the second vertical finishing roller (8), since the outer arc surfaces of the second horizontal finishing roller (19) and the second vertical finishing roller (8) are both in the same semicircular shape, this design ensures that the tube billet is finished more evenly and accurately in the final stage. Finally, after finishing, the outer diameter of the tube billet reaches the regularity requirement to meet the specification standards and can be discharged smoothly.

10. The method for preparing a titanium alloy tube according to claim 6, characterized in that: In step S6, when the tube blank is ground, the ratio of the depth to the width of the grinding area is controlled within 1:6.

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