CN111530963B - Manufacturing method of glass liquid stirring rod main shaft - Google Patents
Manufacturing method of glass liquid stirring rod main shaft Download PDFInfo
- Publication number
- CN111530963B CN111530963B CN202010356849.8A CN202010356849A CN111530963B CN 111530963 B CN111530963 B CN 111530963B CN 202010356849 A CN202010356849 A CN 202010356849A CN 111530963 B CN111530963 B CN 111530963B
- Authority
- CN
- China
- Prior art keywords
- main shaft
- stirring rod
- tube blank
- tube
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/18—Stirring devices; Homogenisation
- C03B5/187—Stirring devices; Homogenisation with moving elements
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention belongs to the technical field of precious metal product manufacturing, and particularly discloses a method for manufacturing a glass liquid stirring rod main shaft, which is convenient to operate and basically does not change the properties of raw materials. The manufacturing method comprises the steps of blanking, pipe coiling, welding, drawing and assembling. In the welding step, two joint parts matched with the tubular plate are heated to 1350-1400 ℃ through welding flame, the heating part is forged through an air hammer at the frequency of 110-120 times/minute, and the two joint parts can be welded and connected on the premise that the property of a dispersion-strengthened precious metal material is basically not changed, so that the strength of a welding seam part is close to that of a base material, the quality of a stirring rod main shaft is improved, and the service life of the stirring rod main shaft is prolonged; and a drawing step and an assembling step, wherein after the pipe blank is drawn, each drawn standby pipe is assembled, the wall thickness is not reduced, and the standby pipes are drawn to the final size of the stirring rod main shaft, so that the whole process is simple and convenient to operate, and the overall strength and quality of the stirring rod main shaft are ensured.
Description
Technical Field
The invention belongs to the technical field of precious metal product manufacturing, and particularly relates to a manufacturing method of a glass liquid stirring rod main shaft.
Background
In the production process of optical glass and liquid crystal substrate glass, a stirring rod is commonly used for stirring glass liquid to make the glass liquid more uniform, so that the defects of stripes, bubbles and the like are avoided during glass forming. The stirring rod main shaft is generally made of a dispersion-strengthened precious metal material, and preferably made of a dispersion-strengthened platinum alloy, a dispersion-strengthened platinum-rhodium alloy and other materials with higher strength than pure platinum or a platinum-rhodium alloy. When the stirring rod is used, the stirring rod main shaft is driven to rotate by the stirrer motor, then the stirring rod blades are driven to rotate, all stress is concentrated on the stirring rod main shaft, the glass melting temperature is high, the melting temperature of part of optical glass and liquid crystal glass is higher than 1400 ℃, the viscosity is high, the stirring rod main shaft is continuously operated at high temperature for a long time, and the stirring rod main shaft is easy to distort and deform, so that the service life of the whole stirring rod is influenced.
When the high-temperature and high-viscosity molten glass is smelted, in order to ensure the overall strength and the service life of the stirring rod main shaft, the diameter and the thickness of the stirring rod main shaft are required to be increased; because the dispersion strengthening precious metal material has complex manufacturing process, high cost and large precious metal loss, for the stirring rod main shaft with a single-cylinder structure, the larger the diameter and the thickness of the stirring rod main shaft are, the larger the manufacturing difficulty is, the longer the manufacturing time is, the more dispersion strengthening precious metal materials need to be consumed, and the lower the material benefit rate is; for example: the weight of a stirring rod main shaft with the inner diameter of 45mm, the wall thickness of 5mm and the length of 1000mm reaches more than 15kg, and a dispersion strengthening noble metal spindle with the weight of more than 40kg needs to be smelted for manufacturing. Therefore, in order to reduce the manufacturing difficulty and improve the manufacturing efficiency and the utilization rate of materials, the main shaft of the glass liquid stirring rod is often manufactured into a double-cylinder structure or a three-cylinder structure.
At present, the method for manufacturing the main shaft of the glass melt stirring rod comprises the following steps: the blanking plate is coiled into a tubular shape by a pipe coiling device, and then the plate is manufactured by argon arc welding, weld joint elimination and drawing forming processes. However, argon arc welding requires heating and melting of materials, which often causes the property change of the dispersion-strengthened precious metal material, so that dispersoids uniformly distributed in the precious metal material for enhancing the material property are separated out, the strength of a welding seam part is far lower than that of a base metal, the strength of the welding seam part is only equivalent to that of a common precious metal, and the welding seam part is easy to distort and deform under the action of thermal stress and torsional stress in the long-term high-temperature stirring process.
Disclosure of Invention
The invention aims to provide a method for manufacturing a main shaft of a molten glass stirring rod, which is convenient to operate and basically does not change the properties of raw materials.
The technical scheme adopted by the invention for solving the technical problems is as follows: the manufacturing method of the glass liquid stirring rod main shaft is characterized in that the glass liquid stirring rod main shaft is of a double-cylinder structure or a three-cylinder structure and comprises the steps of blanking, pipe coiling, welding, drawing and assembling;
a welding step: firstly, sleeving a coiled plate on a core rod, and then placing the plate on an air hammer worktable so that two joint parts of the plate which are matched together face upwards and correspond to the air hammer; then, heating the two joint parts which are matched together by using welding flame from one end of the joint part to 1350-1400 ℃, keeping the heating temperature for continuous heating, and simultaneously starting an air hammer to forge the heating part at the frequency of 110-120 times/minute until the two joint parts at the forging part are welded into a whole; then, the operations are sequentially carried out from one end of the joint to the other end of the joint until the two joints are completely welded into a whole to manufacture a tube blank; finally, separating the core rod from the tube blank, and naturally cooling the tube blank to room temperature;
drawing: setting the wall thickness of a main shaft of the stirring rod to be manufactured as T, the middle diameter as phi and the length as L;
if the main shaft of the stirring rod to be manufactured is a double-cylinder structure made of two tube blanks, one tube blank is drawn to the inner diameter phi-T +4 and the wall thickness T/2 according to the drawing process and is used as an inner tube for standby; drawing the other tube blank to the inner diameter of phi +5.5 and the wall thickness of T/2 according to the drawing process, and using the tube blank as an outer tube for later use;
if the main shaft of the stirring rod to be manufactured is composed ofDrawing the first tube blank to an inner diameter phi-T +6 and a wall thickness T/3 according to a drawing process to form a three-tube structure by using the three tube blanks, and using the three tube blanks as an inner tube for later use; drawing the second tube blank to an inner diameter of phi +7.5 and a wall thickness of T/3 according to the drawing process, and using the second tube blank as a middle tube for later use; finally, drawing the third tube blank to the inner diameter of
The wall thickness is T/3, and the outer tube is used for standby;
assembling: when the main shaft of the stirring rod to be manufactured is of a double-cylinder structure, firstly, penetrating an inner pipe into an outer pipe to ensure that one ends of the two pipes are aligned and respective welding seams are staggered, then firmly welding the aligned end faces of the two pipes, closing up the end faces, drawing to the final size of the main shaft of the stirring rod according to the drawing process without reducing the wall thickness, and adding no lubricating oil between the pipes in the drawing process;
when the main shaft of the stirring rod to be manufactured is of a three-cylinder structure, firstly, penetrating an inner pipe into a middle pipe to ensure that one ends of two pipes are aligned and welding seams are staggered, then firmly welding the aligned end faces of the two pipes, closing up the end faces, and drawing the double-cylinder pipe blank into a double-cylinder pipe blank with an inner diameter phi-T +4 and a wall thickness of 2T/3 according to a drawing process; cleaning the outer surface of the double-tube blank, drying the double-tube blank by blowing, penetrating the double-tube blank into the outer tube to ensure that one ends of the three tubes are aligned and respective welding seams are staggered, firmly welding the aligned end faces of the three tubes, closing the end faces, drawing the double-tube blank to the final size of a main shaft of the stirring rod according to the drawing process without reducing the wall thickness, and adding no lubricating oil between the tubes in the drawing process.
Further, before the drawing step is started, the cooled tube blank is firstly put into hydrochloric acid with the concentration of 30-35% for soaking for more than 30 minutes, and then taken out and the inner and outer surfaces of the tube blank are washed clean by pure water.
Further, before the assembly step, heating the drawn pipe blank from one end to the other end by using welding flame to completely burn drawing oil on the inner surface and the outer surface of the drawn pipe blank, naturally cooling the drawn pipe blank, cleaning the inner surface and the outer surface of the drawn pipe blank by using industrial alcohol with the purity of more than 98 percent, and drying the cleaned pipe blank by blowing.
Further, in the assembling step, when the main shaft of the stirring rod to be manufactured is of a double-cylinder structure, the welding seams of the inner pipe and the outer pipe are staggered by 180 degrees; when the main shaft of the stirring rod to be manufactured is of a three-cylinder structure, the welding seams of the inner pipe, the middle pipe and the outer pipe are staggered by 120 degrees.
Further, the blanking step: firstly, selecting dispersion strengthening precious metal as a manufacturing material;
when the main shaft of the stirring rod to be manufactured is of a double-cylinder structure, calculating the size of the required plate according to the following formula I, formula II and formula III according to the wall thickness T, the middle diameter phi and the length L of the main shaft of the stirring rod to be manufactured, and blanking to obtain two plates;
w is 3.14 x phi + w' … … … formula two;
when the main shaft of the stirring rod to be manufactured is of a three-cylinder structure, calculating the size of the required plate according to the wall thickness T, the middle diameter phi and the length L of the main shaft of the stirring rod to be manufactured and the formulas II, IV and V, and blanking to obtain three plates;
in the formula, t represents the thickness of the plate to be blanked, t 'represents the thickness allowance, and t' is more than or equal to 0.1mm and less than or equal to 0.2 mm; w represents the width of the plate to be blanked, w 'represents the width allowance, and w' is more than or equal to 30mm and less than or equal to 40 mm; l represents the length of the plate to be blanked, l 'represents the length allowance, and l' is more than or equal to 30mm and less than or equal to 40 mm.
Further, the manufacturing method of the glass melt stirring rod main shaft further comprises a plate annealing step;
annealing the plate: firstly, placing a plate obtained by blanking into an automatic annealing furnace with the furnace temperature of 900 +/-50 ℃ for heating for 120-130 minutes, and then, preserving heat for 30-35 minutes at the temperature of 1400 +/-30 ℃; taking out the plate after the temperature is preserved and the plate is cooled to 900 +/-10 ℃, and naturally cooling to room temperature.
Furthermore, the manufacturing method of the glass liquid stirring rod main shaft further comprises a step of processing a joint part;
a joint processing step: and processing two ends of the annealed plate in the length direction into two joint parts which can be matched and connected together.
Further, in the joint processing step of the manufacturing method of the molten glass stirring rod spindle, the two ends of the plate in the length direction are hammered by a hammering tool to form a joint, the joint is cleaned by industrial alcohol with the purity of more than 98%, and then the surface of the joint is dried by compressed air with the pressure of 0.2-0.3 Mpa.
Further, the pipe coiling step: the sheet material with the joints formed is rolled into a tubular shape by a pipe rolling apparatus, and the two joints of the sheet material are fitted to each other while being overlapped with each other.
Further, the manufacturing method of the glass liquid stirring rod main shaft further comprises a cleaning step;
a cleaning step: the inner surface and the outer surface of the stirring rod main shaft which is assembled are cleaned by industrial alcohol with the purity of more than 98 percent, and then the stirring rod main shaft is dried by compressed air with the pressure of 0.2-0.3 Mpa.
The invention has the beneficial effects that: according to the manufacturing method of the glass liquid stirring rod main shaft, in the welding step, two joint parts formed by matching tubular plates together are heated to 1350-1400 ℃ through welding flame, the heating temperature is kept to be continuously heated, and the heating part is forged through an air hammer at the frequency of 110-120 times/minute, so that the two joint parts can be welded and connected on the premise that the property of a dispersion-strengthened precious metal material is basically not changed, the strength of the welding joint part is close to that of a base metal, and the quality and the service life of the stirring rod main shaft are improved; in the drawing step, the required tube blank is drawn according to the structure of the main shaft of the stirring rod to be manufactured, so that the operation is convenient, and the size and the quality of each drawn standby tube can be effectively controlled; in the assembling step, all the standby pipes are assembled according to the structure of the stirring rod main shaft to be manufactured, the wall thickness is not reduced, the final size of the stirring rod main shaft is drawn, the overall strength and quality of the stirring rod main shaft are guaranteed, the whole process is easy and convenient to operate, and the manufacturing efficiency is high.
Drawings
FIG. 1 is a schematic view of a plate material with a joint formed;
FIG. 2 is a schematic view of a sheet material rolled into a tubular shape;
FIG. 3 is a schematic view of the structure of the tube blank;
FIG. 4 is a schematic structural view of a stirring rod main shaft in a double-cylinder structure;
FIG. 5 is a schematic view of the construction of a double tube blank;
FIG. 6 is a schematic structural view of a main shaft of a stirring rod with a three-cylinder structure;
labeled as: plate material 10, joint 11, tube blank 20, weld 21, double tube blank 30, and stir bar spindle 40.
Detailed Description
The invention is further described below with reference to the figures and examples.
The manufacturing method of the glass liquid stirring rod main shaft is characterized in that the glass liquid stirring rod main shaft is of a double-cylinder structure or a three-cylinder structure and comprises the steps of blanking, pipe coiling, welding, drawing and assembling;
blanking: generally, a dispersion-strengthened precious metal is selected as a manufacturing material to be fed to obtain a plate 10; the dispersion-strengthened precious metal can be various, and is preferably dispersion-strengthened platinum or dispersion-strengthened platinum-rhodium alloy;
pipe coiling: the plate 10 is generally provided with joint portions 11 at both ends in the longitudinal direction; rolling the sheet material 10 with the joints 11 formed thereon into a tubular shape by a pipe rolling apparatus, and fitting the two joints 11 of the sheet material 10 to each other while overlapping each other, as shown in fig. 2;
a welding step: firstly, sleeving a coiled plate 10 on a core rod, and then placing the plate on an air hammer worktable so that two joint parts 11 of the plate 10 which are matched together face upwards to correspond to the air hammer; then, heating the two joint parts 11 which are matched together by using welding flame from one end of the joint part 11, keeping the heating temperature for continuous heating after heating to 1350-1400 ℃, and simultaneously starting an air hammer to forge the heating part at the frequency of 110-120 times/minute until the two joint parts 11 at the forging part are welded into a whole; then, the above operations are sequentially performed along one end of the joint 11 to the other end thereof until the two joints 11 are completely welded together to make a tube blank 20, as shown in fig. 3; finally, separating the core rod from the tube blank 20, and naturally cooling the tube blank 20 to room temperature; the tube blank 20 is generally placed in the air to be naturally cooled, and the room temperature is 20-25 ℃; in the step, the adopted core rod needs to have higher hardness and surface roughness and cannot generate adverse effect on dispersion strengthening precious metals; preferably, the core rod is made of Cr12MoV, the quenching hardness HRC of the core rod reaches 60-62, and the surface of the core rod is plated with chrome; in order to facilitate forging, the outer diameter of the core rod is generally 3-5 mm smaller than the inner diameter of the tubular plate 10; the welding flame used may be of various kinds, preferably oxyhydrogen flame;
drawing: setting the wall thickness of a main shaft of the stirring rod to be manufactured as T, the middle diameter as phi and the length as L; the wall thickness T of the stirring rod main shaft is equal to the value obtained by subtracting the inner diameter of the stirring rod main shaft from the outer diameter of the stirring rod main shaft, and the value is divided by two; the middle diameter phi of the stirring rod main shaft is the diameter of the middle ring with the wall thickness, and the middle diameter phi of the stirring rod main shaft is equal to the value obtained by adding the outer diameter of the stirring rod main shaft and the inner diameter of the stirring rod main shaft and dividing the value by two;
if the main shaft of the stirring rod to be manufactured is a double-cylinder structure made of two tube blanks 20, one tube blank 20 is drawn to the inner diameter phi-T +4 and the wall thickness T/2 according to the drawing process and is used as an inner tube for standby; drawing the other tube blank 20 to the inner diameter of phi +5.5 and the wall thickness of T/2 according to the drawing process, and using the tube blank as an outer tube for standby;
if the main shaft of the stirring rod to be manufactured is of a three-tube structure made of three tube blanks 20, drawing the first tube blank 20 to the inner diameter phi-T +6 and the wall thickness T/3 according to the drawing process, and using the first tube blank as an inner tube for standby; then according to the drawing processDrawing two tube blanks 20 to the inner diameter of phi +7.5 and the wall thickness of T/3, and using the tube blanks as middle tubes for standby; finally, the third tube blank 20 is drawn to an inside diameter of
The wall thickness is T/3, and the outer tube is used for standby;
assembling: when the main shaft of the stirring rod to be manufactured is of a double-cylinder structure, the inner pipe is penetrated in the outer pipe, one ends of the two pipes are aligned, respective welding seams 21 are staggered, the aligned end faces of the two pipes are welded firmly, then the end faces are closed, the main shaft of the stirring rod is drawn to the final size of the main shaft of the stirring rod according to the drawing process without reducing the wall thickness, and as shown in fig. 4, lubricating oil is not added between the pipes in the drawing process;
when the main shaft of the stirring rod to be manufactured is of a three-cylinder structure, firstly, the inner pipe penetrates through the middle pipe, one ends of the two pipes are aligned, welding seams 21 are staggered, the aligned end faces of the two pipes are firmly welded, then the end faces are closed, and the two pipes are drawn into a double-cylinder pipe blank 30 with an inner diameter phi-T +4 and a wall thickness of 2T/3 according to a drawing process, as shown in FIG. 5; cleaning the outer surface of the double-tube blank 30, drying the double-tube blank by blowing, penetrating the double-tube blank into the outer tube to ensure that one ends of the three tubes are aligned and respective welding seams 21 of the three tubes are staggered, firmly welding the aligned end surfaces of the three tubes, closing the end surfaces, drawing the double-tube blank to the final size of a stirring rod main shaft according to the drawing process without reducing the wall thickness, and adding no lubricating oil between the tubes in the drawing process as shown in fig. 6; the double tube blank 30 is cleaned and dried by using industrial alcohol with a purity of 98% or more, and then the surface of the joint is dried by using compressed air with a pressure of 0.2 to 0.3 Mpa.
In the process of manufacturing the stirring rod main shaft by using the manufacturing method of the glass liquid stirring rod main shaft, two joint parts 11 which are matched with a tubular plate 10 together are heated to a proper temperature through welding flame, the heating temperature is kept to be continuously heated, and simultaneously, a heating part is forged at a proper frequency through an air hammer, so that the two joint parts are welded and connected, and dispersoid in a dispersion strengthened precious metal material is not precipitated in the welding process, so that the property of the dispersion strengthened precious metal material is basically not changed, the strength of the welding seam part is close to the strength of a base metal, and the quality and the service life of the stirring rod main shaft are favorably improved; and a drawing step and an assembling step, wherein after the pipe blank 20 is drawn, each drawn standby pipe is assembled, the wall thickness is not reduced and the standby pipes are drawn to the final size of the stirring rod main shaft, the whole process is simple and convenient to operate, and the overall strength and quality of the stirring rod main shaft are ensured.
The blanking step generally adopts rolling blanking, and in order to improve the utilization rate of materials, reduce cost and avoid waste, the blanking amount needs to be effectively controlled; preferably, in the blanking step, when the main shaft of the stirring rod to be manufactured is of a double-cylinder structure, the size of the required plate 10 is calculated according to the following formula I, formula II and formula III according to the wall thickness T, the intermediate diameter phi and the length L of the main shaft of the stirring rod to be manufactured, and blanking is performed to obtain two plates 10;
w is 3.14 x phi + w' … … … formula two;
when the main shaft of the stirring rod to be manufactured is of a three-cylinder structure, calculating the size of the required plate 10 according to the wall thickness T, the middle diameter phi and the length L of the main shaft of the stirring rod to be manufactured and the formulas II, IV and V, and blanking to obtain three plates 10;
in the formula, t represents the thickness of the plate 10 to be blanked, t 'represents the thickness allowance, and t' is more than or equal to 0.1mm and less than or equal to 0.2 mm; w represents the width of the plate 10 to be blanked, w 'represents the width allowance, and w' is more than or equal to 30mm and less than or equal to 40 mm; l represents the length of the plate 10 to be blanked, l 'represents the length allowance, and l' is more than or equal to 30mm and less than or equal to 40 mm.
In order to facilitate the subsequent processing of the plate 10, the manufacturing method of the glass melt stirring rod main shaft generally further comprises a plate annealing step;
annealing the plate: firstly, placing a plate 10 obtained by blanking into an automatic annealing furnace with the furnace temperature of 900 +/-50 ℃ for heating for 120-130 minutes, and then, preserving heat for 30-35 minutes at the temperature of 1400 +/-30 ℃; and after heat preservation, taking out the plate 10 when the temperature of the plate is cooled to 900 +/-10 ℃, and naturally cooling to room temperature. In the step, the stress in the dispersion-strengthened precious metal sheet 10 can be effectively released, and the ductility and toughness of the dispersion-strengthened precious metal sheet can be increased by effectively controlling the heating and heat-preserving temperature and time. In this step, the annealed sheet 10 is preferably placed on the alumina refractory bricks to perform natural cooling.
In order to facilitate tube formation, the manufacturing method of the glass stirring rod main shaft generally further comprises a joint part processing step;
a joint processing step: both ends of the annealed sheet material 10 in the longitudinal direction are processed into two joint portions 11 that can be joined together in a fitting manner. On the basis, in order to facilitate the matching and connection of the joint part 11 and simplify the processing process, the joint part 11 is preferably processed into a wedge shape, and the horizontal projection length of the oblique side of the wedge part is 10-12 mm, as shown in fig. 1.
The joint 11 may be processed in various manners, preferably, the joint 11 is formed by hammering both ends of the plate 10 in the length direction by a hammering tool, the joint 11 is cleaned by industrial alcohol having a purity of 98% or more, and then the surface of the joint is blow-dried by compressed air having a pressure of 0.2 to 0.3 Mpa. In order to ensure the processing quality, the surface roughness of a hammering surface of a hammering tool is generally required to be more than R0.4, and the hammering surface is processed on a stainless steel platform; the hammering tool can be various, and is preferably a hammer made of Cr12MoV material.
In order to prevent the adhesion of metal impurities to the tube blank 20 and the quality of the drawn tube blank 20 from being affected, the cooled tube blank 20 is usually immersed in hydrochloric acid having a concentration of 30 to 35% for 30 minutes or more before the drawing step is started, and then taken out and the inner and outer surfaces of the tube blank 20 are washed clean with pure water.
Generally, before the assembly step is started, the drawing oil on the tube blank 20 needs to be removed; the cleaning mode can be various, preferably, welding flame is used for heating from one end to the other end of the drawn pipe blank, so that drawing oil on the inner surface and the outer surface of the drawn pipe blank is completely combusted, then natural cooling is carried out, and after the natural cooling, industrial alcohol with the purity of more than 98 percent is used for cleaning the inner surface and the outer surface of the drawn pipe blank and drying the pipe blank.
In the assembling step, when the main shaft of the stirring rod to be manufactured is of a double-cylinder structure, the welding seams 21 of the inner pipe and the outer pipe are preferably staggered by 180 degrees; when the main shaft of the stirring rod to be manufactured has a three-cylinder structure, it is preferable that the respective welding seams 21 of the inner pipe, the middle pipe and the outer pipe are staggered by 120 ° from each other. Therefore, the welding seams 21 of the pipes can be staggered to the maximum extent, and the overall strength of the stirring rod main shaft is effectively ensured.
As a preferred scheme of the invention, the manufacturing method of the glass liquid stirring rod main shaft further comprises a cleaning step;
a cleaning step: the inner surface and the outer surface of the stirring rod main shaft 40 which is assembled are cleaned by industrial alcohol with the purity of more than 98 percent, and then the stirring rod main shaft is dried by compressed air with the pressure of 0.2-0.3 Mpa.
Example 1
The method is adopted to manufacture the main shaft of the glass liquid stirring rod with a double-cylinder structure, wherein the wall thickness T is 6mm, the intermediate diameter phi is 52mm, and the length L is 1200mm, and the manufacturing process is as follows:
blanking: selecting dispersion strengthened platinum as a manufacturing material, calculating the thickness t of the required plate 10 to be 3.2mm, the width w to be 190mm and the length l to be 1000mm according to a formula I, a formula II and a formula III, and blanking to obtain two plates 10;
annealing the plate: firstly, placing a plate 10 obtained by blanking into an automatic annealing furnace with the furnace temperature of 900 ℃ for heating for 120 minutes, and then preserving heat for 30 minutes at the temperature of 1400 ℃; taking out the plate 10 after heat preservation and cooling to 900 ℃, and placing the plate on an alumina refractory brick for natural cooling to room temperature;
a joint processing step: after annealing, hammering two ends of the plate 10 in the length direction to form wedge-shaped joint parts 11 by a hammering tool with a hammering surface roughness of R0.4, wherein the two joint parts 11 can be matched and connected together, cleaning the joint parts 11 by industrial alcohol with the purity of more than 98%, and then blow-drying the surfaces of the joint parts by compressed air with the pressure of 0.2 Mpa;
pipe coiling: rolling the plate material 10 with the joints 11 formed thereon into a tubular shape by a pipe rolling apparatus, and fitting the two joints 11 of the plate material 10 to each other while overlapping;
a welding step: firstly, sleeving a coiled plate 10 on a core rod, and then placing the plate on an air hammer worktable so that two joint parts 11 of the plate 10 which are matched together face upwards to correspond to the air hammer; then, the two joined portions 11 fitted together are heated from one end of the joined portions 11 by using a welding flame, and after heating to 1350 ℃, the heated portion is forged at a frequency of 118 times/min by starting an air hammer while keeping the heating temperature and continuing heating until the two joined portions 11 at the forged portion are welded together; then, the above operations are sequentially performed along one end of the joint 11 to the other end thereof until the two joints 11 are completely welded together to make the tube blank 20; finally, separating the core rod from the tube blank 20, and naturally cooling the tube blank 20 to room temperature; the core rod is made of Cr12MoV, the quenching hardness HRC of the core rod reaches 60-62, and chromium is plated on the surface of the core rod; the outer diameter of the core rod is 3mm smaller than the inner diameter of the tubular plate 10;
before the drawing step is started, the cooled tube blank 20 is firstly put into 35% hydrochloric acid for soaking for 30 minutes, and then taken out and the inner and outer surfaces of the tube blank 20 are washed clean by pure water;
drawing: selecting two tube blanks 20, drawing one tube blank 20 to an inner diameter of 50mm and a wall thickness of 3mm according to a drawing process, and using the tube blank as an inner tube for later use; drawing the other tube blank 20 to an inner diameter of 57.5mm and a wall thickness of 3mm according to a drawing process, and using the drawn tube blank as an outer tube for later use;
before the assembly step is started, heating the drawn tube blank 10 from one end to the other end by using welding flame to completely burn drawing oil on the inner surface and the outer surface of the tube blank, naturally cooling the tube blank, cleaning the inner surface and the outer surface of the tube blank by using industrial alcohol with the purity of more than 98 percent after the tube blank is naturally cooled, and drying the tube blank by using compressed air with the pressure of 0.2 Mpa;
assembling: firstly, penetrating an inner tube into an outer tube, ensuring that one ends of the two tubes are aligned and respective welding seams 21 are staggered by 180 degrees, then firmly welding the aligned end faces of the two tubes, then closing the end faces, drawing the tube to the final size of a main shaft of a stirring rod according to the drawing process without reducing the wall thickness, and adding no lubricating oil between the tubes in the drawing process;
a cleaning step: the inner and outer surfaces of the stirring rod main shaft 40 assembled are cleaned by industrial alcohol with the purity of more than 98 percent, and then the stirring rod main shaft is dried by compressed air with the pressure of 0.3 Mpa.
Compared with the prior art, the whole manufacturing process has the advantages that the manufacturing efficiency is improved by 20 percent, and the utilization rate of the dispersion-strengthened precious metal material is improved by 40 percent.
Through detection, the strength of the manufactured stirring rod main shaft 40 is higher than that of the stirring rod main shaft manufactured by the existing method; the service life of the main shaft of the stirring rod is more than 3 years, and is improved by more than 50 percent compared with the service life of the main shaft of the stirring rod manufactured by the existing method.
Example 2
The method is adopted to manufacture the three-cylinder structure glass liquid stirring rod main shaft with the wall thickness T of 6mm, the middle diameter phi of 65mm and the length L of 1100mm, and the manufacturing process is as follows:
blanking: selecting dispersion strengthening platinum-rhodium alloy as a manufacturing material, calculating the thickness t of the required plate 10 to be 2.2mm, the width w to be 240mm and the length l to be 880mm according to a formula I, a formula II and a formula III, and blanking to obtain three plates 10;
annealing the plate: firstly, placing a plate 10 obtained by blanking into an automatic annealing furnace with the furnace temperature of 920 ℃ to heat for 128 minutes, and then preserving heat for 33 minutes at the temperature of 1420 ℃; taking out the plate 10 after heat preservation and cooling to 910 ℃, and placing the plate on an alumina refractory brick for natural cooling to room temperature;
a joint processing step: after annealing, forming wedge-shaped joint parts 11 at two ends of a hammer hammering plate 10 which is made of Cr12MoV material and has a hammering surface with the surface roughness of R0.4 in the length direction, wherein the two joint parts 11 can be matched and connected together, cleaning the joint parts 11 by using industrial alcohol with the purity of more than 98%, and then blowing and drying the surfaces of the joint parts by using compressed air with the pressure of 0.2 Mpa;
pipe coiling: rolling the plate material 10 with the joints 11 formed thereon into a tubular shape by a pipe rolling apparatus, and fitting the two joints 11 of the plate material 10 to each other while overlapping;
a welding step: firstly, sleeving a coiled plate 10 on a core rod, and then placing the plate on an air hammer worktable so that two joint parts 11 of the plate 10 which are matched together face upwards to correspond to the air hammer; then, the two joint parts 11 which are matched together are heated from one end of the joint part 11 by using welding flame, after the two joint parts are heated to 1380 ℃, the heating part is forged by an air hammer at the frequency of 110 times/minute while keeping the heating temperature and continuously heating until the two joint parts 11 at the forging part are welded into a whole; then, the above operations are sequentially performed along one end of the joint 11 to the other end thereof until the two joints 11 are completely welded together to make the tube blank 20; finally, separating the core rod from the tube blank 20, and naturally cooling the tube blank 20 to room temperature; the core rod is made of Cr12MoV, the quenching hardness HRC of the core rod reaches 60-62, and chromium is plated on the surface of the core rod; the outer diameter of the core rod is 5mm smaller than the inner diameter of the tubular plate 10;
before the drawing step is started, the cooled tube blank 20 is firstly put into hydrochloric acid with the concentration of 30 percent for soaking for 35 minutes, and then taken out and the inner and outer surfaces of the tube blank 20 are washed clean by pure water;
drawing: selecting three tube blanks 20, drawing the first tube blank 20 to an inner diameter of 65mm and a wall thickness of 2mm according to a drawing process, and using the first tube blank as an inner tube for later use; drawing the second tube blank 20 to an inner diameter of 72.5mm and a wall thickness of 2mm according to a drawing process, and using the second tube blank as a middle tube for later use; finally, drawing the third tube blank 20 to an inner diameter of 76.5mm and a wall thickness of 2mm according to a drawing process, and using the third tube blank as an outer tube for later use;
before the assembly step is started, heating the drawn tube blank 10 from one end to the other end by using welding flame to completely burn drawing oil on the inner surface and the outer surface of the tube blank, naturally cooling the tube blank, cleaning the inner surface and the outer surface of the tube blank by using industrial alcohol with the purity of more than 98 percent after the tube blank is naturally cooled, and drying the tube blank by using compressed air with the pressure of 0.2 Mpa;
assembling: firstly, penetrating an inner tube into a middle tube, ensuring that one ends of the two tubes are aligned and welding seams 21 are staggered by 120 degrees, then firmly welding the aligned end faces of the two tubes, closing the end faces, and drawing the end faces into a double-tube blank 30 with the inner diameter of 63mm and the wall thickness of 4mm according to a drawing process; cleaning the outer surface of the double-tube blank 30, drying the double-tube blank by blowing, penetrating the double-tube blank into the outer tube to ensure that one ends of the three tubes are aligned and respective welding seams 21 of the three tubes are staggered by 120 degrees, then firmly welding the aligned end surfaces of the three tubes, closing the end surfaces, drawing the double-tube blank to the final size of a main shaft of the stirring rod according to the drawing process without reducing the wall thickness, and adding no lubricating oil between the tubes in the drawing process;
a cleaning step: the inner and outer surfaces of the stirring rod main shaft 40 assembled are cleaned by industrial alcohol with the purity of more than 98 percent, and then the stirring rod main shaft is dried by compressed air with the pressure of 0.2 Mpa.
Compared with the prior art, the whole manufacturing process has the advantages that the manufacturing efficiency is improved by 20 percent, and the utilization rate of the dispersion-strengthened precious metal material is improved by 45 percent.
Through detection, the strength of the manufactured stirring rod main shaft 40 is higher than that of the stirring rod main shaft manufactured by the existing method; the service life of the main shaft of the stirring rod is 3 years, which is improved by about 50 percent compared with the service life of the main shaft of the stirring rod manufactured by the existing method.
Claims (10)
1. The manufacturing method of the glass liquid stirring rod main shaft is characterized in that the glass liquid stirring rod main shaft is of a double-cylinder structure or a three-cylinder structure and comprises the steps of blanking, pipe coiling, welding, drawing and assembling; the method is characterized in that:
a welding step: firstly, sleeving a coiled plate (10) on a core rod in a penetrating way, and then placing the plate on an air hammer worktable surface to enable two joint parts (11) of the plate (10) to be matched together to be upward and correspond to the air hammer; then, heating the two joint parts (11) which are matched together from one end of the joint part (11) by using welding flame, keeping the heating temperature for continuous heating after heating to 1350-1400 ℃, and simultaneously starting an air hammer to forge the heating part at the frequency of 110-120 times/minute until the two joint parts (11) at the forging part are welded into a whole; then, the operations are carried out in sequence from one end of the joint part (11) to the other end thereof until the two joint parts (11) are completely welded into a whole to manufacture a tube blank (20); finally, separating the core rod from the tube blank (20) and naturally cooling the tube blank (20) to room temperature;
drawing: setting the wall thickness of a main shaft of the stirring rod to be manufactured as T, the middle diameter as phi and the length as L;
if the main shaft of the stirring rod to be manufactured is a double-cylinder structure made of two tube blanks (20), one tube blank (20) is drawn to the inner diameter phi-T +4 and the wall thickness T/2 according to the drawing process and is used as an inner tube for standby; drawing the other tube blank (20) to the inner diameter phi +5.5 and the wall thickness T/2 according to the drawing process, and using the tube blank as an outer tube for standby;
if the main shaft of the stirring rod to be manufactured is of a three-tube structure made of three tube blanks (20), drawing the first tube blank (20) to an inner diameter phi-T +6 and a wall thickness T/3 according to a drawing process, and using the first tube blank as an inner tube for standby; drawing the second tube blank (20) to an inner diameter of phi +7.5 and a wall thickness of T/3 according to a drawing process, and using the second tube blank as a middle tube for later use; finally, drawing the third tube blank (20) to an inside diameter of
The wall thickness is T/3, and the outer tube is used for standby;
assembling: when the main shaft of the stirring rod to be manufactured is of a double-cylinder structure, firstly, penetrating an inner pipe into an outer pipe to ensure that one ends of the two pipes are aligned and respective welding seams (21) are staggered, then firmly welding the aligned end faces of the two pipes, then closing up the end faces, drawing to the final size of the main shaft of the stirring rod according to the drawing process without reducing the wall thickness, and adding no lubricating oil between the pipes in the drawing process;
when the main shaft of the stirring rod to be manufactured is of a three-cylinder structure, firstly, the inner pipe penetrates through the middle pipe, one ends of the two pipes are aligned, welding seams (21) are staggered, the aligned end faces of the two pipes are firmly welded, then the end faces are closed, and the pipe is drawn into a double-cylinder pipe blank (30) with the inner diameter phi-T +4 and the wall thickness of 2T/3 according to a drawing process; cleaning the outer surface of a double-tube blank (30), drying the double-tube blank by blowing, penetrating the double-tube blank into the outer tube to ensure that one ends of the three tubes are aligned and respective welding seams (21) of the three tubes are staggered, firmly welding the aligned end faces of the three tubes, closing the end faces, drawing the double-tube blank to the final size of a stirring rod main shaft according to the drawing process without reducing the wall thickness, and adding no lubricating oil between the tubes in the drawing process.
2. The method of manufacturing a molten glass stirring rod main shaft according to claim 1, wherein: before the drawing step is started, the cooled tube blank (20) is firstly put into hydrochloric acid with the concentration of 30-35% for soaking for more than 30 minutes, and then taken out and washed by pure water to clean the inner surface and the outer surface of the tube blank (20).
3. The method of manufacturing a molten glass stirring rod main shaft according to claim 1, wherein: before the assembling step is started, welding flame is used for heating from one end to the other end of the drawn tube blank to enable drawing oil on the inner surface and the outer surface of the tube blank to be completely combusted, then natural cooling is carried out, and after the natural cooling, industrial alcohol with the purity of more than 98% is used for cleaning the inner surface and the outer surface of the tube blank and drying the tube blank.
4. The method of manufacturing a molten glass stirring rod main shaft according to claim 1, wherein: in the assembling step, when the main shaft of the stirring rod to be manufactured is of a double-cylinder structure, the welding seams (21) of the inner pipe and the outer pipe are staggered by 180 degrees; when the main shaft of the stirring rod to be manufactured is of a three-cylinder structure, the welding seams (21) of the inner pipe, the middle pipe and the outer pipe are staggered by 120 degrees.
5. The method for manufacturing a main shaft of a molten glass stirring rod according to any one of claims 1 to 4, wherein:
blanking: firstly, selecting dispersion strengthening precious metal as a manufacturing material;
when the main shaft of the stirring rod to be manufactured is of a double-cylinder structure, calculating the size of the required plate (10) according to the following formula I, formula II and formula III according to the wall thickness T, the middle diameter phi and the length L of the main shaft of the stirring rod to be manufactured, and blanking to obtain two plates (10);
w is 3.14 x phi + w' … … … formula two;
when the main shaft of the stirring rod to be manufactured is of a three-cylinder structure, calculating the size of the required plate (10) according to the wall thickness T, the middle diameter phi and the length L of the main shaft of the stirring rod to be manufactured and the formulas II, IV and V, and blanking to obtain three plates (10);
in the formula, t represents the thickness of the plate (10) to be blanked, t' represents the thickness allowance, and t is more than or equal to 0.1mm and less than or equal to 0.2 mm; w represents the width of the plate (10) to be blanked, w 'represents the width allowance, and w' is more than or equal to 30mm and less than or equal to 40 mm; l represents the length of the plate (10) to be blanked, l 'represents the length allowance, and l' is more than or equal to 30mm and less than or equal to 40 mm.
6. The method of manufacturing a molten glass stirring rod main shaft according to claim 5, wherein: further comprises a plate annealing step;
annealing the plate: firstly, placing a plate (10) obtained by blanking into an automatic annealing furnace with the furnace temperature of 900 +/-50 ℃ for heating for 120-130 minutes, and then preserving heat for 30-35 minutes at the temperature of 1400 +/-30 ℃; after heat preservation, the plate (10) is taken out when being cooled to 900 +/-10 ℃, and then is naturally cooled to room temperature.
7. The method of manufacturing a molten glass stirring rod main shaft according to claim 6, comprising: further comprising a joint processing step;
a joint processing step: both ends of the annealed sheet material (10) in the longitudinal direction are processed into two joint parts (11) which can be connected together in a matching manner.
8. The method of manufacturing a molten glass stirring rod main shaft according to claim 7, comprising: in the joint processing step, the two ends of the plate (10) in the length direction are hammered by a hammering tool to form joints (11), the joints (11) are cleaned by industrial alcohol with the purity of more than 98%, and then the surfaces of the joints are dried by compressed air with the pressure of 0.2-0.3 Mpa.
9. The method of manufacturing a molten glass stirring rod main shaft according to claim 7, comprising:
pipe coiling: the plate material (10) with the joint parts (11) processed is rolled into a tubular shape by a pipe rolling device, and the two joint parts (11) of the plate material (10) are overlapped and matched with each other.
10. The method for manufacturing a main shaft of a molten glass stirring rod according to any one of claims 1 to 4, wherein: also comprises a cleaning step;
a cleaning step: the inner surface and the outer surface of the stirring rod main shaft which is assembled are cleaned by industrial alcohol with the purity of more than 98 percent, and then the stirring rod main shaft is dried by compressed air with the pressure of 0.2-0.3 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356849.8A CN111530963B (en) | 2020-04-29 | 2020-04-29 | Manufacturing method of glass liquid stirring rod main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356849.8A CN111530963B (en) | 2020-04-29 | 2020-04-29 | Manufacturing method of glass liquid stirring rod main shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111530963A CN111530963A (en) | 2020-08-14 |
| CN111530963B true CN111530963B (en) | 2021-08-03 |
Family
ID=71967611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010356849.8A Active CN111530963B (en) | 2020-04-29 | 2020-04-29 | Manufacturing method of glass liquid stirring rod main shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111530963B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114635102B (en) * | 2022-03-22 | 2023-09-22 | 咸阳欧冶科技有限公司 | Method for improving high-temperature reliability of platinum-rhodium alloy pipe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09174148A (en) * | 1995-12-22 | 1997-07-08 | Usui Internatl Ind Co Ltd | Manufacture of multiplex winding metallic pipe and device thereof |
| CN1475326A (en) * | 2002-08-17 | 2004-02-18 | 舱壁玻璃公司 | Material dead jointing method for forming ODS |
| JP2006188375A (en) * | 2005-01-04 | 2006-07-20 | Tanaka Kikinzoku Kogyo Kk | Stirrer for manufacturing glass |
| CN201057316Y (en) * | 2007-06-20 | 2008-05-07 | 中国石油天然气集团公司 | Heavy caliber double-layer submerged arc welding pipe |
| CN103402688A (en) * | 2011-02-14 | 2013-11-20 | 尤米科尔股份两合公司 | Method of producing a welded article of dispersion strengthened platinum-based alloy with two steps welding |
| CN104159854A (en) * | 2012-03-07 | 2014-11-19 | 田中贵金属工业株式会社 | Stirrer shaft pipe and method for producing same |
| CN107354339A (en) * | 2017-07-27 | 2017-11-17 | 成都光明派特贵金属有限公司 | Dispersion intensifying platinum rhodium and platinum composite and preparation method thereof |
-
2020
- 2020-04-29 CN CN202010356849.8A patent/CN111530963B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09174148A (en) * | 1995-12-22 | 1997-07-08 | Usui Internatl Ind Co Ltd | Manufacture of multiplex winding metallic pipe and device thereof |
| CN1475326A (en) * | 2002-08-17 | 2004-02-18 | 舱壁玻璃公司 | Material dead jointing method for forming ODS |
| JP2006188375A (en) * | 2005-01-04 | 2006-07-20 | Tanaka Kikinzoku Kogyo Kk | Stirrer for manufacturing glass |
| CN201057316Y (en) * | 2007-06-20 | 2008-05-07 | 中国石油天然气集团公司 | Heavy caliber double-layer submerged arc welding pipe |
| CN103402688A (en) * | 2011-02-14 | 2013-11-20 | 尤米科尔股份两合公司 | Method of producing a welded article of dispersion strengthened platinum-based alloy with two steps welding |
| CN104159854A (en) * | 2012-03-07 | 2014-11-19 | 田中贵金属工业株式会社 | Stirrer shaft pipe and method for producing same |
| CN107354339A (en) * | 2017-07-27 | 2017-11-17 | 成都光明派特贵金属有限公司 | Dispersion intensifying platinum rhodium and platinum composite and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 彩色显象管玻壳熔炉用Pt、Rh包复Mo合金搅拌器骨材机械加工工艺研究;倪水庭等;《上海钢研》;19871231(第02期);第53,57-59页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111530963A (en) | 2020-08-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101825200B (en) | Titanium alloy TC4 hot-rolled tube and production method thereof | |
| CN103849803B (en) | Tantalum alloy and method for preparing tantalum alloy tube | |
| CN109609747B (en) | Homogenizing treatment process for coiled tubing | |
| CN105331913B (en) | Method for thermally extruding and deforming high-temperature alloy Inconel 625 pipe through short process | |
| CN111530963B (en) | Manufacturing method of glass liquid stirring rod main shaft | |
| CN102274941A (en) | Method for making bimetal composite seamless tube with metallurgical bonding layer | |
| CN113522972B (en) | Production process of stainless steel composite plate with corrosion-resistant surface | |
| CN105458633B (en) | A kind of manufacture method of mild steel coiled tubing | |
| CN111349859B (en) | Large-thickness 500 MPa-level high-Z-direction laminar-performance low-temperature container steel plate rolled by composite blank and manufacturing method thereof | |
| RU178157U1 (en) | MULTI-LAYER BILL FOR HOT ROLLING | |
| CN113732498A (en) | Laser welding method for high-grade silicon steel plate | |
| CN104894432B (en) | A kind of 110ksi levels titanium alloy oil pipe and preparation method thereof | |
| CN107740020A (en) | A kind of preparation method of titanium nickel tube material | |
| CN111187933A (en) | Method for manufacturing UNS N06617 small-caliber pipe | |
| CN114855084B (en) | Hot-rolled round steel for 120ksi steel grade high-strength high-toughness high-grade sulfur-resistant drill rod joint and preparation method thereof | |
| CN101954539A (en) | Friction welding process for copper material and aluminum alloy material | |
| CN113549746A (en) | Forging and heat treatment process of steel for 20MnMo tube plate | |
| CN116160753B (en) | Single-sided stainless steel composite board and preparation method thereof | |
| JP6119691B2 (en) | Forged steel pipe excellent in widening workability, its manufacturing method and manufacturing equipment | |
| CN110791624A (en) | Online annealing method for stainless steel composite plate strip | |
| CN100463733C (en) | Method for processing titanium pipe used for computer mobile hard disk main shaft sleeve | |
| CN117655678A (en) | Preparation method of titanium copper explosion composite cylinder for high-conductivity cathode roller | |
| CN114515897B (en) | Vacuum preheating welding composite preparation process for high-carbon-equivalent thick plate blank | |
| CN111906277B (en) | Production method of bimetal composite pipe blank | |
| CN110369976B (en) | Production process of electric welding pipe for automobile transmission shaft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |