CN114042753A - Preparation method of lithium-boron alloy strip blank - Google Patents
Preparation method of lithium-boron alloy strip blank Download PDFInfo
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- CN114042753A CN114042753A CN202111235528.3A CN202111235528A CN114042753A CN 114042753 A CN114042753 A CN 114042753A CN 202111235528 A CN202111235528 A CN 202111235528A CN 114042753 A CN114042753 A CN 114042753A
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- PPTSBERGOGHCHC-UHFFFAOYSA-N boron lithium Chemical compound [Li].[B] PPTSBERGOGHCHC-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910000521 B alloy Inorganic materials 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000003921 oil Substances 0.000 claims description 13
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 16
- 238000005096 rolling process Methods 0.000 abstract description 13
- 239000010406 cathode material Substances 0.000 abstract description 10
- 238000004140 cleaning Methods 0.000 abstract description 3
- 230000002194 synthesizing effect Effects 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 12
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 229910052744 lithium Inorganic materials 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 238000003490 calendering Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a preparation method of a lithium boron alloy strip blank. The preparation method of the lithium-boron alloy strip blank comprises the steps of removing a dead head of a round ingot blank, cleaning the surface of the round ingot blank, then carrying out free upsetting to form a lithium-boron alloy square blank body, and placing the lithium-boron alloy square blank body into a calender for thinning and unidirectional extension. The preparation method of the lithium boron alloy strip blank obtains the high-performance thermal battery cathode material lithium boron alloy strip with the target shape and size on the premise of not changing the original internal structure of the lithium boron alloy ingot blank, realizes high yield and high stability of the material through the precise matching of the precise time and the space of each pressing module, and simultaneously changes the cogging process from synthesizing a round blank to finish rolling the blank into high-efficiency and automatic.
Description
Technical Field
The invention relates to a preparation method of a lithium boron alloy strip blank.
Background
As an ideal lithium-based thermal battery cathode material, the lithium boron alloy has the outstanding advantages of high specific energy, high specific power, low polarization, electrochemical potential close to that of pure lithium, stable structure maintenance at the temperature of over 600 ℃ and the like, and can obviously improve the specific capacity and specific power of a thermal battery when used as the thermal battery cathode material, the volume and the quality of the thermal battery with the same capacity are reduced by 10-30%, the maximum discharge current is increased by 3 times, the specific capacity is improved by nearly 2 times, the performance of the thermal battery is effectively improved, and effective material guarantee is provided for the update and the upgrade of military thermal batteries.
The lithium boron alloy is a composite material, the lithium boron compound synthesized in situ forms a skeleton system with high specific surface in a fiber form, the metal lithium in a molten state at high temperature can be adsorbed in the skeleton system, and the alloy is still in a solid state, so that normal discharge can be realized at the temperature of more than 450 ℃. How to obtain the lithium boron alloy with uniform and fine framework structure is a great problem, and how to process the alloy ingot blank into a thin metal strip is also an important problem for ensuring the uniformity and the integrity of the framework structure. Practice has found that poor processing results in reduced product yield, poor surface quality, and reduced overall and localized thermal stability of the alloy. Thereby deteriorating the quality of the product and reducing the benefit of the product.
The prior art for processing the ingot blank into a thin strip mainly comprises two processes, wherein the first process is blank pressing, rough rolling into a blank and finish rolling into a strip; the second process is direct extrusion into slab and finish rolling into thin strip. The first process is simple, but the yield of the final product is low due to the inherent defects (edge cracking) of the processing in the processing process, the yield of the alloy processing is usually only 60-70%, the lithium boron alloy is a composite material, once scrapped, the lithium boron alloy can only return to the primary state of an oxide, and has no residual value, and the final profit margin of the product is determined by the processing effectiveness due to the fact that the alloy raw materials are expensive materials. The second process is theoretically a process route capable of continuous operation, but in practice, the process has severe shear strain, which may destroy the structure of the lithium boron compound generated in situ, and the market does not have the requirement of continuous production, so that the research on the aspect of economy is not economical, and the research on the system is rarely carried out. In addition, extrusion of lithium boron alloys cannot be aided by the experience of lithium metal extrusion because of the composite material. The extrusion process may cause the front and rear ends of the components to be eccentric, resulting in instability of the thermal stability and discharge capacity of the electrode sheet.
The processing of the lithium boron alloy must be carried out in a low humidity environment, the requirements of the processing are the same as those of the lithium battery, the energy consumption of a drying room is high, and the space is narrow. Therefore, the processing equipment and the method are further limited. As an expensive and fine functional material, the technology of using relatively mature green compacts, rough rolling into blanks and finish rolling into belts is realistic to ensure the quality of products, and the problem that the equipment is huge and cannot be carried out in a drying room during rough rolling, special coatings need to be coated in a common environment to prevent excessive oxidation, and the fine materials are easy to be polluted because the fine materials need to be removed after rolling. Due to the limited ductility of the composite material, the side crack from the square billet to the thin plate is very serious, and the loss rate of the material in the link is very high. Therefore, the cogging process is changed into a process with less environmental influence, reliable process and high yield, which is an important work for improving the material quality and the profit margin.
Disclosure of Invention
Based on the above, the invention provides a preparation method of a lithium boron alloy strip blank, which is used for obtaining a high-performance thermal battery negative electrode material lithium boron alloy strip with a target shape and size on the premise of not changing the original internal structure of the lithium boron alloy ingot blank, and the surface hardness and the fatigue strength of the lithium boron alloy strip are enhanced.
The invention provides a preparation method of a lithium boron alloy strip blank, which comprises the steps of removing a dead head from a round ingot blank, cleaning the surface of the round ingot blank, performing free upsetting to form a lithium boron alloy square blank, putting the lithium boron alloy square blank into a calender for thinning and unidirectional extension, wherein the calender comprises a workbench, a feeding system, a limiting system, a hydraulic oil pump system and a central control operation system, the feeding system is used for controlling the feeding length, the speed and the preset material returning length of the calender, the limiting system is used for adjusting the reduction of a main pressure cylinder, the central control operation system is used for controlling the pressure of the calender, the feeding system at least comprises a feeding motor, the limiting system at least comprises a limiting motor, the hydraulic oil pump system at least comprises an oil pump, the central control operation system at least comprises a manual mode, an automatic mode and parameter setting, the preparation method comprises the following steps:
step one, the feeding motor is retreated to an initial position;
step two, adjusting the height of the limiting motor to 200 mm;
step three, starting the oil pump;
step four, starting the automatic mode for a plurality of rounds to confirm that the hydraulic press runs normally;
putting the ingot blank into the workbench;
step six, starting the manual mode to press the ingot blank until the length of the ingot blank is more than 600 mm;
and seventhly, starting the automatic mode to press the ingot blank, and when the length of the ingot blank is greater than 600mm, feeding the ingot blank into the workbench by the feeding motor to press.
Furthermore, the calender is provided with a movable pressure head, and the movable pressure head faces the thick edge and is made into an arc angle transition inclined plane.
Furthermore, a pressure stop block capable of moving forward and backward is arranged on the side of the extension deformation direction of the calender.
Further, the ingot blank is formed by freely upsetting on a vertical press.
Furthermore, the limiting system adopts single-spiral automatic high-precision position control.
Furthermore, the feeding system adopts a screw to drive automatic high-precision position control.
According to the preparation method of the lithium-boron alloy strip billet, the cylindrical lithium-boron alloy ingot billet of the high-performance thermal battery cathode material can be extruded and cogging through all the steps to obtain the lithium-boron alloy strip of the high-performance thermal battery cathode material with the target shape and size.
Compared with the prior art, the preparation method of the lithium boron alloy strip blank improves the yield of the material, ensures the stability of the material performance and obtains the high-performance thermal battery cathode material lithium boron alloy strip with the target shape and size on the premise of not changing the original internal structure of the lithium boron alloy ingot blank; the precision time and space of each module are precisely matched to ensure the safety, high quality and high efficiency of automatically finishing the one-way calendering work.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for producing a lithium boron alloy strip according to one embodiment of the present invention;
FIG. 2 is a schematic structural view of an apparatus for producing a lithium boron alloy strip according to another embodiment of the present invention;
fig. 3 is a schematic view of the structure of the movable ram of the apparatus shown in fig. 1.
Reference numerals
The device comprises a feeding motor 1, a limiting motor 2, a workbench 3 and a movable pressure head 4.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
The invention provides a preparation method of a lithium boron alloy strip billet, which comprises the steps of removing a dead head of a round ingot billet, cleaning the surface of the round ingot billet, performing free upsetting to form a lithium boron alloy square billet, putting the lithium boron alloy square billet into a calender for ironing and extending in a single direction to change the lithium boron alloy square billet into a thin billet suitable for a finish-rolled strip from a thick square billet and a short square billet, wherein the calender comprises a workbench 3, a feeding system, a limiting system, a hydraulic oil pump system and a central control operation system, the feeding system is used for controlling the feeding length (0-2000mm), the speed (0-200mm/s) and the preset material returning length (0-2000mm) of the calender, the limiting system is used for adjusting the pressing amount of a main pressure cylinder (accurate to 0.01mm) to ensure the pressing size precision and the microstructure uniformity of materials, and the central control operation system is used for controlling the pressure of the calender, the feeding system at least comprises a feeding motor 1, the limiting system at least comprises a limiting motor 2, the hydraulic oil pump system at least comprises an oil pump, the central control operation system at least comprises a manual mode, an automatic mode and parameter setting, and the preparation method comprises the following steps:
step one, the feeding motor is retreated to an initial position;
step two, adjusting the height of the limiting motor to 200 mm;
step three, starting the oil pump;
step four, starting the automatic mode for a plurality of rounds to confirm that the hydraulic press runs normally;
putting the ingot blank into the workbench;
step six, starting the manual mode to press the ingot blank until the length of the ingot blank is more than 600 mm;
and seventhly, starting the automatic mode to press the ingot blank, and when the length of the ingot blank is greater than 600mm, feeding the ingot blank into the workbench by the feeding motor to press.
Wherein the operation is implemented in a dry room required by lithium battery specifications.
Wherein, the central control operation system can realize the computer automatic control (the pressure of the hydraulic press is 0-25MPa, the stroke of the upper plunger is 350mm, the descending speed of the upper plunger is 2-37mm, and the ascending speed of the upper plunger is 20-85 mm) in the pressing process so as to ensure the safe, high-quality, high-efficiency and automatic completion of the one-way rolling process. In addition, the central control operation system can manually input the actual parameters into the central control operation system after the thickness of the lithium boron alloy slab strip is measured according to the actual thickness calibration parameters of the lithium boron alloy slab strip, and the central control operation system calibrates the internal parameters of the system according to the actual thickness parameters of the lithium boron alloy slab strip, so that the accurate control of the lithium boron alloy slab strip is realized.
Wherein, the calender is completed by the following steps: the precise time and space of each module are precisely matched (loading, adjusting the press-in amount, adjusting the feed amount of a stepping motor, pressing an automatic button starting program, advancing the stepping motor to push materials, clamping an oil cylinder, retreating the stepping motor, pressing an upper plunger down, returning an upper plunger up, loosening a clamping oil cylinder, ejecting the material of the ejection oil cylinder, returning the ejection oil cylinder, advancing the stepping motor to push materials, pushing the last time by the stepping motor, clamping the oil cylinder, retreating the stepping motor, pressing the upper plunger down, returning the upper plunger up, finishing the pressing program, adjusting the press-in amount, adjusting the feed amount of the stepping motor, pressing the automatic button starting program and pressing to the specified thickness).
Furthermore, the calender is provided with a movable pressure head 4, in order to reduce the difference between the directional extension and the deformation history inside the material in the pressing process, the thick edge facing the movable pressure head is made into an arc angle transition inclined plane, and the balanced distribution of the shear and the pressure deformation area is ensured; ensuring the identity of the directional extension and the deformation history in the material during pressing. Specifically, the relative rolling reduction and the angle and the size of the transition inclined plane must be matched to meet corresponding requirements so as to ensure that the step-by-step deformation joint area does not generate inward rolling wrinkles.
Furthermore, the side direction of the extension deformation direction of the calender is provided with a pressure stop block capable of advancing and retreating, so that the edge is ensured to be in a compression stress state, and the side crack is prevented.
Further, the ingot blank is formed by freely upsetting on a vertical press.
Further, the parameter setting has a function of setting the amount of depression per press.
Further, the pressing-down amount is controlled to be 15-20% in each pressing.
Further, when the thickness of the ingot blank is larger, the pressing amount is controlled within 20 mm.
Furthermore, the limiting system adopts single-spiral automatic high-precision position control.
Furthermore, the feeding system adopts a screw to drive automatic high-precision position control.
Compared with the prior art, the preparation method of the lithium boron alloy strip blank can extrude and cogging the cylindrical high-performance thermal battery cathode material lithium boron alloy ingot blank through all the steps to obtain the high-performance thermal battery cathode material lithium boron alloy strip with the target shape and size. Compared with the chip processing, the method utilizes the cold plasticity characteristic of the alloy at normal temperature to apply certain pressure on the surface of the lithium boron alloy ingot blank at normal temperature, so that the alloy on the surface layer of the ingot blank generates plastic flow and is filled into the original residual low-concave wave trough, the rough value of the surface of the ingot blank is reduced, and the surface appearance of the lithium boron alloy strip is bright and flat. In addition, due to the arrangement of proper pressing quantity parameters, the phenomenon of wrinkling or edge cracking of the lithium boron alloy strip due to too large or too small deformation is effectively avoided. Compared with the prior art, the extrusion cogging preparation method of the high-performance thermal battery cathode material lithium boron alloy strip has the following advantages: the lithium-boron alloy strip of the high-performance thermal battery cathode material with the target shape and size is obtained on the premise of not changing the original internal structure of the lithium-boron alloy ingot blank, and the edge crack phenomenon in the free forging and rolling process is eliminated, so that the yield of material processing is obviously improved; the precision time and space of each module are precisely matched to ensure the safety, high quality and high efficiency of automatically finishing the one-way calendering work.
In one embodiment, after the calender is electrified, the feeding motor is retreated to the initial position, the height of the limiting motor is adjusted to be 200mm, and after the condition that no barrier exists on the equipment is confirmed, the oil pump is started to use an automatic mode to test for several rounds to confirm that the hydraulic press runs normally; putting an ingot blank with the height of 180.00mm into a workbench, wherein the length of the ingot blank is shorter in the early stage and less than 600mm, adopting a manual mode for feeding, namely, a material pushing rod is held by hands to push the ingot blank into the workbench, after the ingot blank is pressed down for several times, the thickness of the ingot blank is reduced, the length of the ingot blank is increased, and adopting an automatic mode for feeding when the length is more than 600mm, namely, a material feeding motor automatically feeds the ingot blank into the workbench for pressing, so that the labor and the time are greatly saved; when the thickness of the ingot blank is larger in the early stage, the pressing amount of each time is controlled within 20mm, namely 10% of the pressing amount is set for each pressing, so that the pressing thickness is 162.00mm, 145.80mm, 131.22mm and 118.10mm, the thickness of the ingot blank is moderate, 15% of the pressing amount can be set, and the pressing thickness is 100.38mm, 85.32mm and 72.53mm … … until the pressing thickness is about 3.70 mm; the method for adjusting the pressing amount of each time according to the thickness of the ingot blank can avoid the phenomenon that the strip is wrinkled or cracked due to too large or too small deformation.
It can be understood that in another embodiment, after the calender is powered on, the feeding motor is retreated to the initial position, the height of the limiting motor is adjusted to be 200mm, and after no barrier is confirmed on the equipment, the oil pump is started to use the automatic mode to test for several rounds to confirm that the hydraulic press runs normally; putting an ingot blank with the height of 180.00mm into a workbench, wherein the length of the ingot blank is shorter in the early stage and less than 600mm, adopting a manual mode for feeding, namely, a material pushing rod is held by hands to push the ingot blank into the workbench, after the ingot blank is pressed down for several times, the thickness of the ingot blank is reduced, the length of the ingot blank is increased, and adopting an automatic mode for feeding when the length is more than 600mm, namely, a material feeding motor automatically feeds the ingot blank into the workbench for pressing, so that the labor and the time are greatly saved; when the thickness of the ingot blank is larger in the early stage, the pressing amount of each time is controlled within 20mm, namely 15% of the pressing amount is set for each time of pressing, so that the pressing thickness is 153.00mm, 130.05mm, 110.54mm, 93.96mm, 79.87 mm, 67.89mm, 57.70mm, 49.05mm, 41.69mm, 35.44mm, 30.12mm, 25.60mm, 21.76mm, 18.50mm, 15.72mm, 13.37mm, 11.36mm and 9.67mm, at the moment, the thickness of the ingot blank is smaller, and 20% of the pressing amount can be set until the pressing thickness is about 3.70 mm; the method for adjusting the pressing amount of each time according to the thickness of the ingot blank can avoid the phenomenon that the strip is wrinkled or cracked at the edge because of too large or too small deformation; when the thickness of the ingot blank is close to the target thickness, the actual parameters can be manually input into a central control operation system after the thickness of the lithium boron alloy plate blank strip is measured, and the central control operation system calibrates the internal parameters of the system according to the actual thickness parameters of the lithium boron alloy plate blank strip, so that the accurate control of the lithium boron alloy plate blank strip is realized.
Compared with the original rolling process, the preparation method of the lithium-boron alloy strip billet has the advantages that the yield is greatly improved and reaches over 95 percent, the surface quality is good, the surface is smooth and has no blackening, the next procedure can be directly carried out without subsequent processing, the production cost is reduced, and the labor efficiency is improved.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. A preparation method of a lithium boron alloy strip blank is characterized in that a round ingot blank is subjected to free pier pressing after a dead head is removed and the surface is cleaned, so that a lithium boron alloy square blank is formed, the lithium boron alloy square blank is placed into a calender for thinning and unidirectional extension, the calender comprises a workbench, a feeding system, a limiting system, a hydraulic oil pump system and a central control operation system, the feeding system is used for controlling the feeding length, the speed and the preset material returning length of the calender, the limiting system is used for adjusting the reduction of a main pressure cylinder, the central control operation system is used for controlling the pressure of the calender, the feeding system at least comprises a feeding motor, the limiting system at least comprises a limiting motor, the hydraulic oil pump system at least comprises an oil pump, the central control operation system at least comprises a manual mode, an automatic mode and parameter setting, the preparation method comprises the following steps:
step one, the feeding motor is retreated to an initial position;
step two, adjusting the height of the limiting motor to 200 mm;
step three, starting the oil pump;
step four, starting the automatic mode for a plurality of rounds to confirm that the hydraulic press runs normally;
putting the ingot blank into the workbench;
step six, starting the manual mode to press the ingot blank until the length of the ingot blank is more than 600 mm;
and seventhly, starting the automatic mode to press the ingot blank, and when the length of the ingot blank is greater than 600mm, feeding the ingot blank into the workbench by the feeding motor to press.
2. The method for preparing the lithium boron alloy strip blank according to claim 1, wherein the calender is provided with a movable pressure head, and the movable pressure head faces the thick edge to form an arc angle transition slope.
3. The method of claim 1, wherein the calender has a pressure stop capable of advancing and retreating laterally to the direction of elongation.
4. The method of making a lithium boron alloy strip according to claim 1, wherein said ingot is free upset formed on a vertical press.
5. The method of claim 1, wherein the position limiting system is a single-screw automatic high-precision position control system.
6. The method of claim 1, wherein the feeding system is automatically and precisely controlled by a screw drive.
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| US20180233774A1 (en) * | 2016-03-18 | 2018-08-16 | Colorado State University Research Foundation | Multi-functional electrolyte for thermal management of lithium-ion batteries |
| CN111886358A (en) * | 2018-03-26 | 2020-11-03 | Ｊｘ金属株式会社 | Sputtering target member and method for producing same |
| CN109317933A (en) * | 2018-12-03 | 2019-02-12 | 山东重山光电材料股份有限公司 | A kind of processing technology of lithium boron alloy |
| CN109434477A (en) * | 2018-12-03 | 2019-03-08 | 山东重山光电材料股份有限公司 | A kind of lithium boron alloy process equipment |
| CN112439779A (en) * | 2020-11-17 | 2021-03-05 | 湖南仁发材料科技有限公司 | Processing technology for rolling metal material |
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| CN114042753B (en) | 2023-08-08 |
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