CN114367794A - Preparation method of titanium cylinder for welding large-size cathode roller - Google Patents
Preparation method of titanium cylinder for welding large-size cathode roller Download PDFInfo
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Abstract
The invention discloses a preparation method of a welded large-size cathode roll titanium cylinder, which comprises the following steps: firstly, selecting a titanium plate and rolling the titanium plate into a cylinder; attaching two end surfaces to be welded, cleaning the surfaces and forming prefabricated holes; fixing the titanium plate through a tool clamp, setting the positions of a stirring pin and a stirring head, and opening gas protection; setting welding parameters for welding; fifthly, removing the welding tool, and heating and forging the qualified cylinder; sixthly, continuing to deform and heat treat the welding part; seventhly, performing shape correction; machining by using a machine to obtain the cathode roller titanium cylinder. According to the invention, the titanium cylinder is prepared by adopting a titanium plate edge rolling welding mode, the titanium plate is subjected to edge rolling butt welding by adopting a friction stir welding method, the influence on the green foil caused by impurities possibly introduced by fusion welding is avoided, matched process parameters are set, the processing and forming efficiency and precision of the cathode roller titanium cylinder are greatly improved, and the method is particularly suitable for preparing a large cathode roller titanium cylinder.
Description
Technical Field
The invention belongs to the technical field of preparing large-scale cathode roller titanium cylinders, and particularly relates to a preparation method of a welded large-size (the diameter is 2000-3000 mm, and the width is 1400-2000 mm) cathode roller titanium cylinder.
Background
In recent years, with the rapid development of industries such as 5G communication, new energy and the like, the requirements on the yield and the quality of the electrolytic copper foil are greatly improved. The quality of the electrodeposited copper foil is not only relevant to the electrochemical process of its production process, but also important to the equipment manufacturing. As is known, the cathode roll is a key part of electrolytic copper foil complete equipment, the titanium cylinder is a core part of the cathode roll, the electrolytic copper foil directly nucleates and grows on the surface of the electrolytic copper foil, and the performance of the copper foil is closely related to the micro size and uniformity of crystal grains on the surface of the titanium cylinder, so that the problem of how to economically and efficiently prepare the high-performance titanium cylinder is difficult.
The existing technology of mature industry is to prepare a titanium cylinder by adopting a ring-shaped part spinning mode, the mode needs to be processed by the working procedures of casting → sizing forging → sizing ring rolling → spinning and the like, and particularly, the titanium cylinder is prepared by using a spinning technology, a spinning blank titanium ring with the same inner diameter as that of a finished product titanium cylinder needs to be prepared by using a ring rolling technology, and then the titanium ring is subjected to powerful spinning to prepare the titanium cylinder. Because the fixed end of the titanium cylinder is a region which does not participate in deformation, the free end of the titanium cylinder is lack of constraint and is easy to generate flanging when deforming, the tail non-deformation region and the head free deformation region of the titanium cylinder which is spun out need to be cut off, and only the part with uniform middle section deformation is used. The method has the advantages that the cathode roller titanium cylinder prepared by the spinning method is long in period and low in material utilization rate, large-scale special spinning equipment is needed, and meanwhile, the diameter and the width of the titanium cathode roller are limited by a rolled ring-shaped part and a spinning die, so that the free change of the cathode roller is not facilitated, and the industrialized popularization and the use are not facilitated; in addition, under the influence of various factors such as market cost, environment and the like, the demand of a large titanium cylinder which is a key device for producing the electrolytic copper foil is greatly increased, and particularly the demand of a large-size (not less than phi 2000 mm) titanium cathode roller with high electrolytic efficiency is larger. Therefore, it is necessary and urgent to develop a method for preparing a titanium cylinder for a cathode roller, which is low in cost, simple in manufacture, and free from the limitation of a die in diameter and width of the titanium cylinder.
In view of the above, the present inventors propose a method for preparing a welded large-sized cathode roll titanium cylinder, so as to overcome the defects of the prior art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a preparation method for welding a large-size cathode roll titanium cylinder.
The purpose of the invention is solved by the following technical scheme:
a preparation method for welding a large-size cathode roller titanium cylinder comprises the following steps:
step one, selecting an annealed titanium plate, and then rolling the titanium plate into a cylinder by using a plate rolling machine;
step two, closely attaching two end surfaces to be welded, cleaning the surface of the cylinder to ensure that no oil stain exists, and then forming a prefabricated hole at a position 4-6 mm close to any end surface on the butt joint seam to be welded on the outer wall of the cylinder, wherein the depth of the prefabricated hole is 1-3 mm;
fixing the titanium plate on the back of the butt joint seam to be welded by using a tool fixture, then enabling a rotating stirring pin to be perpendicular to the butt joint seam to be welded, enabling the center line of a stirring head to be just positioned on the center line of the butt joint seam to be welded, slowly pressing the stirring pin into the outer surface of the cylinder until a shaft shoulder of the stirring head is in contact with the upper surface of the titanium plate and generates certain pressure, and simultaneously opening gas protection;
fourthly, starting welding, enabling the rotating stirring pin to advance along the to-be-welded joint of the titanium plate for welding, stopping advancing until 1-3 mm of unwelded length remains at the tail end of the to-be-welded joint, finishing welding and drawing out the stirring pin;
step five, dismantling a welding tool, erecting the welded cylinder to inspect a welding seam, heating the qualified cylinder inside and outside the cylinder, taking the welding seam as the center, and heating the area within 1cm of the welding seam left and right, and forging the welding seam;
step six, continuously heating the forged welding line to 600 ℃ without cooling, keeping the temperature for 8-10 min, then removing the heating, and cooling the welding line to room temperature;
seventhly, performing shape correction treatment on the cylinder subjected to the treatment in the sixth step by using a plate bending machine, and controlling the straightness deviation and the roundness deviation of the cylinder within 1 mm;
and step eight, machining the cylinder after the sizing treatment in the step seven to obtain the cathode roller titanium cylinder.
Further, the thickness of the titanium plate in the first step is 15-20 mm, the microstructure of the titanium plate is uniform isometric crystal, and the average grain size is 8-9 grades.
Furthermore, the outer diameter of the cylinder in the first step is 2006-3010 mm, and the width of the cylinder is 1420-2020 mm.
Furthermore, the position of the prefabricated hole 5mm away from any end face of the cylinder in the second step is arranged, and the depth of the prefabricated hole is 2 mm.
Further, the stirring head in the third step adopts a tungsten-rhenium alloy stirring head, and the diameter ratio of the diameter of the stirring pin to the shaft shoulder diameter of the stirring head is 1: 3.
further, the length of the stirring pin is 13-18 mm, the diameter of the stirring pin is 8-10 mm, and the diameter of the shaft shoulder of the stirring head is 24-30 mm.
Furthermore, the rotation speed of the stirring pin in the fourth step is 1000-1500 r/min, and the welding advancing speed is 200-300 mm/min.
And further, heating the welding seam in an infrared heating mode in the fifth step.
Further, the welding seam cooling mode in the sixth step is water cooling.
Further, the machining mode of the step eight is turning, and 3-5mm is turned on one side of the cylinder in the inner diameter direction and one side of the cylinder in the outer diameter direction respectively; then the upper and lower ends of the cylinder are each turned off by 10 mm.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to a preparation method of a welded large-size cathode roller titanium cylinder, which adopts a plate roll welding technology to prepare the cathode roller titanium cylinder, and the titanium cylinder has simple forming mode, high material utilization rate and no limit on the specification range of the titanium cylinder; the friction stir welding method adopted by the invention is different from the traditional fusion welding, has the advantages of small welding heat affected zone, fine and uniform weld seam, isometric crystal and the like, is particularly very similar to the microstructure of a base material, and can meet the production requirement of high-quality copper foil. In conclusion, the method has concise technological parameters, is suitable for industrial production and popularization, can effectively improve the processing and forming efficiency and precision of the cathode roller titanium cylinder, provides a solution for overcoming the technical problems of the current domestic cathode roller manufacturing, and can be used for preparing the large-size (the diameter is 2000-3000 mm, the width is 1400-2000 mm) cathode roller titanium cylinder.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a flow chart of the preparation process of the present invention;
FIG. 2 is a schematic diagram of a prefabricated hole formed when a large-size cathode roll titanium cylinder is prepared according to the present invention;
FIG. 3 is a graph of grains before localized deformation and heat treatment of the butt weld region in example 1 of the present invention;
FIG. 4 is a graph of grains after local deformation and heat treatment of the weld zone in example 1 of the present invention;
in the figure: 1 is a cylinder; 11 are prefabricated holes.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.
Referring to fig. 1, the invention provides a method for preparing a welded large-size (diameter 2000-3000 mm, width 1400-2000 mm) cathode roll titanium cylinder, which comprises the following steps:
step one, selecting an annealed titanium plate, and then rolling the titanium plate into a cylinder by using a plate rolling machine;
specifically, the thickness of the selected titanium plate (which is made of sponge titanium through smelting and rolling) is 15-20 mm, the microstructure of the titanium plate is uniform isometric crystal, and the average grain size is 8.5-10 grades; the outer diameter of the rolled cylinder is 2006-3010 mm, and the width of the rolled cylinder is 1420-2020 mm;
step two, closely attaching two end surfaces to be welded, cleaning the surface of the cylinder to ensure that no oil stain exists, and then forming a prefabricated hole at a position 4-6 mm close to any end surface on the butt joint seam to be welded on the outer wall of the cylinder, wherein the depth of the prefabricated hole is 1-3 mm; the purpose of arranging the prefabricated holes is to enable the stirring head to have a pre-pressed amount, so that the subsequent welding quality is facilitated, and the diameter of the prefabricated holes is generally matched with that of the stirring needle;
fixing the titanium plate on the back of the butt joint to be welded by using a tool fixture, then enabling a rotating stirring pin to be perpendicular to the butt joint to be welded, enabling the center line of a stirring head to be just positioned on the center line of the butt joint to be welded, slowly pressing the stirring pin into the outer surface of a cylinder until a shaft shoulder of the stirring head is in contact with the upper surface of the titanium plate and generates certain pressure (namely the stirring head is in close contact with the titanium plate), and simultaneously opening gas protection, such as argon;
specifically, the stirring head adopts the tungsten-rhenium alloy stirring head, and the diameter of the stirring pin and the shaft shoulder diameter ratio of the stirring head are 1: 3; the length of the stirring needle is 13-18 mm, the diameter of the stirring needle is 8-10 mm, and the diameter of the shaft shoulder of the stirring head is 24-30 mm;
fourthly, starting welding, enabling the rotating stirring pin to advance along the to-be-welded joint of the titanium plate for welding, stopping advancing until 1-3 mm of unwelded length remains at the tail end of the to-be-welded joint, finishing welding and drawing out the stirring pin;
specifically, the rotation speed of the stirring pin is 1000-1500 r/min, and the welding advancing speed is 200-300 mm/min.
Step five, dismantling a welding tool, erecting the welded cylinder to inspect a welding seam, heating the qualified cylinder inside and outside the cylinder, taking the welding seam as the center, and heating the area within 1cm of the welding seam left and right, and forging the welding seam;
preferably, the welding seam is heated by adopting an infrared heating mode, the infrared heating is thermal radiation heating, the heating area can be precisely heated, heat exchange cannot be carried out in a non-heating target area, and the influence of heating on the titanium plate base material is avoided;
step six, continuously heating the forged welding line to 600 ℃ without cooling, keeping the temperature for 8-10 min, then removing the heating, and cooling the welding line to room temperature;
seventhly, performing shape correction treatment on the cylinder subjected to the treatment in the sixth step by using a plate bending machine, and controlling the straightness deviation and the roundness deviation of the cylinder within 1 mm;
step eight, machining the cylinder after the sizing treatment in the step seven to obtain a cathode roller titanium cylinder;
specifically, turning is performed on a numerical control vertical lathe, for example. Turning 3-5mm on the single side in the inner and outer diameter directions respectively; and then turning off the upper end and the lower end of the cylinder by 10mm respectively, and removing the unwelded area and the welded head and tail areas to finish the preparation of the cathode roll titanium cylinder.
To further verify the efficacy of the preparation method of the present invention, the inventors conducted the following tests:
example 1
Preparing a cathode roller titanium cylinder with the diameter of 2000mm and the width of 1400mm
Step one, selecting an annealed titanium plate with the length of 6299mm, the thickness of 15mm, the width of 1420mm and the average grain size of 8.5 grades, and rolling the annealed titanium plate into a cylinder 1 with the outer diameter of 2006mm by using a plate rolling machine;
secondly, tightly attaching two end faces to be welded on the axial direction of the cylinder and cleaning the surface of the cylinder to ensure that no oil stain exists, and then forming a prefabricated hole 11 (shown in figure 2) at a position 4mm (both left and right end faces) close to the end face on a butt joint seam to be welded on the outer wall of the cylinder, wherein the depth of the prefabricated hole is about 1 mm;
fixing the titanium plate on the back of the butt joint to be welded by using a tool fixture, enabling a tungsten-rhenium alloy stirring pin which rotates highly to be perpendicular to the butt joint to be welded, enabling the center line of a stirring head to be just positioned on the center line of the butt joint to be welded, slowly pressing the stirring pin into the outer surface of a cylinder which is rolled by the titanium plate until a shaft shoulder of the stirring head is in contact with the upper surface of the pure titanium plate to generate certain pressure, and simultaneously opening gas protection; wherein the length of the stirring needle is 13mm, the diameter of the stirring needle is 8mm, and the diameter of the shaft shoulder of the stirring head is 24 mm;
fourthly, starting welding, setting the rotation speed of the stirring pin to be 1500r/min, setting the welding advancing speed to be 300mm/min, carrying out advancing welding on the stirring pin rotating at a high speed along the to-be-welded joint of the titanium plate until the end of the to-be-welded joint is left with the unwelded length of about 1mm, stopping advancing, finishing welding and drawing out the stirring pin;
step five, dismantling the welding tool, erecting the welded cylinder and checking a welding seam by adopting a visual method to ensure that no impurities exist and unwelded holes exist; inspecting the qualified cylinder, performing infrared heating on the inside and outside of the cylinder body within the range of 1cm around the welding line by taking the welding line as the center, heating the area to 500 ℃, and slightly forging the welding line by adopting a small hammer;
step six, the forged welding line is not required to be cooled, the welding line is continuously heated to 600 ℃ and kept for 8min, then the heating is removed, and the welding line is cooled to room temperature by water; the weld joint structure of friction stir welding is fine isometric crystal with the grain size of about 10 grades (as shown in figure 3), then local deformation and heat treatment are carried out on the weld joint area, the grain size of the weld joint can be coarsened to 8.5-9 grades (as shown in figure 4), the grain size is consistent with that of a base plate, the influence on foil caused by large difference of the grain levels of a welding area and a non-welding area is avoided, and the requirement for producing high-quality copper foil can be met;
seventhly, performing shape correction treatment on the cylinder subjected to the treatment in the sixth step by using a plate bending machine, and controlling the straightness deviation and the roundness deviation of the cylinder within 1 mm;
step eight, turning the cylinder after the correction in the step seven on a numerical control vertical lathe; turning 3mm on one side in the inner and outer diameter directions respectively; and then turning off the upper end and the lower end of the cylinder by 10mm respectively, and removing the unwelded area and the welded head and tail areas to finish the preparation of the cathode roll titanium cylinder.
Example 2
Preparing a cathode roller titanium cylinder with the diameter of 2500mm and the width of 1800mm
Step one, selecting an annealed titanium plate with the length of 7875mm, the thickness of 18mm, the width of 1820mm and the average grain size of 8 grades, and rolling the annealed titanium plate into a cylinder with the outer diameter of 2508mm by using a plate rolling machine;
secondly, tightly attaching two end faces to be welded on the axial direction of the cylinder and cleaning the surface of the cylinder to ensure that no oil stain exists, and then forming a prefabricated hole at a position 5mm (both left and right end faces) close to the end faces on a butt joint seam to be welded on the outer wall of the cylinder, wherein the depth of the prefabricated hole is about 2 mm;
fixing the titanium plate on the back of the butt joint to be welded by using a tool fixture, enabling a tungsten-rhenium alloy stirring pin which rotates highly to be perpendicular to the butt joint to be welded, enabling the center line of a stirring head to be just positioned on the center line of the butt joint to be welded, slowly pressing the stirring pin into the outer surface of a cylinder which is rolled by the titanium plate until a shaft shoulder of the stirring head is in contact with the upper surface of the pure titanium plate to generate certain pressure, and simultaneously opening gas protection; wherein the length of the stirring needle is 15mm, the diameter of the stirring needle is 9mm, and the diameter of the shaft shoulder of the stirring head is 27 mm;
fourthly, starting welding, setting the rotation speed of the stirring pin to be 1300r/min, setting the welding advancing speed to be 350mm/min, carrying out advancing welding on the stirring pin rotating at a high speed along the to-be-welded joint of the titanium plate until the end of the to-be-welded joint is left with the unwelded length of about 2mm, stopping advancing, finishing welding and drawing out the stirring pin;
step five, dismantling the welding tool, erecting the welded cylinder and checking a welding seam by adopting a visual method to ensure that no impurities exist and unwelded holes exist; inspecting the qualified cylinder, performing infrared heating on the inside and outside of the cylinder body within the range of 1cm around the welding line by taking the welding line as the center, heating the area to 500 ℃, and slightly forging the welding line by adopting a small hammer;
step six, the forged welding line is not required to be cooled, the welding line is continuously heated to 600 ℃ and kept for 9min, then the heating is removed, and the welding line is cooled to room temperature by water; the weld joint structure of friction stir welding is fine isometric crystal with the grain size of about 10 grades, and then local deformation and heat treatment are carried out on the weld joint area, so that the grain size of the weld joint can be coarsened to 8-8.5 grades and is consistent with the grain size of a base plate, and the influence on the green foil is avoided;
seventhly, performing shape correction treatment on the cylinder subjected to the treatment in the sixth step by using a plate bending machine, and controlling the straightness deviation and the roundness deviation of the cylinder within 1 mm;
step eight, turning the cylinder after the correction in the step seven on a numerical control vertical lathe; turning 4mm on one side in the inner and outer diameter directions respectively; and then turning off the upper end and the lower end of the cylinder by 10mm respectively, and removing the unwelded area and the welded head and tail areas to finish the preparation of the cathode roll titanium cylinder.
Example 3
Preparing a cathode roller titanium cylinder with the diameter of 3000mm and the width of 2000mm
Step one, selecting an annealed titanium plate with the length of 9452mm, the thickness of 20mm, the width of 2020mm and the average grain size of 9 grades, and rolling the annealed titanium plate into a cylinder with the outer diameter of 3010mm by using a plate rolling machine;
secondly, tightly attaching two end faces to be welded on the axial direction of the cylinder and cleaning the surface of the cylinder to ensure that no oil stain exists, and then forming a prefabricated hole at a position 5mm (both left and right end faces) close to the end faces on a butt joint seam to be welded on the outer wall of the cylinder, wherein the depth of the prefabricated hole is about 3 mm;
fixing the titanium plate on the back of the butt joint to be welded by using a tool fixture, enabling a tungsten-rhenium alloy stirring pin which rotates highly to be perpendicular to the butt joint to be welded, enabling the center line of a stirring head to be just positioned on the center line of the butt joint to be welded, slowly pressing the stirring pin into the outer surface of a cylinder which is rolled by the titanium plate until a shaft shoulder of the stirring head is in contact with the upper surface of the pure titanium plate to generate certain pressure, and simultaneously opening gas protection; wherein the length of the stirring needle is 18mm, the diameter of the stirring needle is 10mm, and the diameter of the shaft shoulder of the stirring head is 30 mm;
fourthly, starting welding, setting the rotation speed of the stirring pin to be 1000r/min, setting the welding advancing speed to be 200mm/min, carrying out advancing welding on the stirring pin rotating at a high speed along the to-be-welded joint of the titanium plate until the end of the to-be-welded joint is left with the unwelded length of about 3mm, stopping advancing, finishing welding and drawing out the stirring pin;
step five, dismantling the welding tool, erecting the welded cylinder and checking a welding seam by adopting a visual method to ensure that no impurities exist and unwelded holes exist; inspecting the qualified cylinder, performing infrared heating on the inside and outside of the cylinder body within the range of 1cm around the welding line by taking the welding line as the center, heating the area to 500 ℃, and slightly forging the welding line by adopting a small hammer;
step six, the forged welding line is not required to be cooled, the welding line is continuously heated to 600 ℃ and kept for 10min, then the heating is removed, and the welding line is cooled to room temperature by water; the weld joint structure of friction stir welding is fine isometric crystal with the grain size of about 10 grades, and then local deformation and heat treatment are carried out on the weld joint area, so that the grain size of the weld joint can be coarsened to 9-9.5 grades and is consistent with the grain size of a base plate, and the influence on the green foil is avoided;
seventhly, performing shape correction treatment on the cylinder subjected to the treatment in the sixth step by using a plate bending machine, and controlling the straightness deviation and the roundness deviation of the cylinder within 1 mm;
step eight, turning the cylinder after the correction in the step seven on a numerical control vertical lathe; turning 5mm on the single side in the inner and outer diameter directions respectively; and then turning off the upper end and the lower end of the cylinder by 10mm respectively, and removing the unwelded area and the welded head and tail areas to finish the preparation of the cathode roll titanium cylinder.
Through the above examples, the present invention is fully illustrated by performing a rolling butt welding on a hot-rolled titanium plate by using a friction stir welding method, so as to avoid the influence of impurities possibly introduced by fusion welding on the foil. Meanwhile, the welding method is different from the traditional welding method in that the friction stir welding belongs to solid state welding, the welding seam area is not an as-cast structure with coarse grains but fine isometric crystals, the welding seam is very similar to the microstructure of the base material, and the production requirement of high-quality copper foil can be met. In a word, the process adopted by the invention is suitable for industrial production, and can effectively improve the efficiency and the precision of the processing and forming of the cathode roller titanium cylinder.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A preparation method for welding a large-size cathode roll titanium cylinder is characterized by comprising the following steps:
step one, selecting an annealed titanium plate, and then rolling the titanium plate into a cylinder by using a plate rolling machine;
step two, closely attaching two end surfaces to be welded, cleaning the surface of the cylinder to ensure that no oil stain exists, and then forming a prefabricated hole at a position 4-6 mm close to any end surface on the butt joint seam to be welded on the outer wall of the cylinder, wherein the depth of the prefabricated hole is 1-3 mm;
fixing the titanium plate on the back of the butt joint seam to be welded by using a tool fixture, then enabling a rotating stirring pin to be perpendicular to the butt joint seam to be welded, enabling the center line of a stirring head to be just positioned on the center line of the butt joint seam to be welded, slowly pressing the stirring pin into the outer surface of the cylinder until a shaft shoulder of the stirring head is in contact with the upper surface of the titanium plate and generates certain pressure, and simultaneously opening gas protection;
fourthly, starting welding, enabling the rotating stirring pin to advance along the to-be-welded joint of the titanium plate for welding, stopping advancing until 1-3 mm of unwelded length remains at the tail end of the to-be-welded joint, finishing welding and drawing out the stirring pin;
step five, dismantling a welding tool, erecting the welded cylinder to inspect a welding seam, heating the qualified cylinder inside and outside the cylinder, taking the welding seam as the center, and heating the area within 1cm of the welding seam left and right, and forging the welding seam;
step six, continuously heating the forged welding line to 600 ℃ without cooling, keeping the temperature for 8-10 min, then removing the heating, and cooling the welding line to room temperature;
seventhly, performing shape correction treatment on the cylinder subjected to the treatment in the sixth step by using a plate bending machine, and controlling the straightness deviation and the roundness deviation of the cylinder within 1 mm;
and step eight, machining the cylinder after the sizing treatment in the step seven to obtain the cathode roller titanium cylinder.
2. The method for preparing the welded large-size cathode roll titanium cylinder according to claim 1, wherein the thickness of the titanium plate in the first step is 15-20 mm, the microstructure of the titanium plate is uniform isometric crystal, and the average grain size of the titanium plate is 8-9 grades.
3. The method for preparing the welded large-size cathode roll titanium cylinder as claimed in claim 1, wherein in the first step, the outer diameter of the cylinder is 2006-3010 mm, and the width of the cylinder is 1420-2020 mm.
4. The method for preparing the welded large-size cathode roll titanium cylinder according to claim 1, wherein in the second step, the preformed hole is arranged at a position 5mm away from any end face of the cylinder, and the depth of the preformed hole is 2 mm.
5. The method for preparing the welded large-size cathode roll titanium cylinder as claimed in claim 1, wherein the stirring head in the third step is made of tungsten-rhenium alloy, and the diameter ratio of the diameter of the stirring pin to the shaft shoulder diameter of the stirring head is 1: 3.
6. the method for preparing the welded large-size cathode roll titanium cylinder according to claim 5, wherein the length of the stirring pin is 13-18 mm, the diameter of the stirring pin is 8-10 mm, and the diameter of the shaft shoulder of the stirring head is 24-30 mm.
7. The method for preparing the welded large-size cathode roll titanium cylinder according to claim 1, wherein the rotation speed of the stirring pin in the fourth step is 1000-1500 r/min, and the welding advance speed is 200-300 mm/min.
8. The method for preparing the welded large-size cathode roll titanium cylinder according to claim 1, wherein in the fifth step, the welding seam is heated by adopting an infrared heating mode.
9. The method for preparing the welded large-size cathode roll titanium cylinder according to claim 1, wherein the cooling mode of the welding seam in the sixth step is water cooling.
10. The method for preparing the welded large-size cathode roll titanium cylinder according to claim 1, wherein the eight machining modes are turning, and the single edges in the inner diameter direction and the outer diameter direction of the cylinder are respectively turned for 3-5 mm; then the upper and lower ends of the cylinder are each turned off by 10 mm.
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| CN115319429A (en) * | 2022-10-17 | 2022-11-11 | 西安稀有金属材料研究院有限公司 | Method for crystallizing both welding seam area and base material area of titanium or titanium alloy welding plate |
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