CN113832328A - Roller manufacturing method of lithium battery pole piece rolling mill - Google Patents
Roller manufacturing method of lithium battery pole piece rolling mill Download PDFInfo
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- CN113832328A CN113832328A CN202111073700.XA CN202111073700A CN113832328A CN 113832328 A CN113832328 A CN 113832328A CN 202111073700 A CN202111073700 A CN 202111073700A CN 113832328 A CN113832328 A CN 113832328A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/021—Rolls for sheets or strips
-
- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0025—Supports; Baskets; Containers; Covers
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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Abstract
The invention discloses a roller manufacturing method of a lithium battery pole piece rolling mill, which is characterized in that a roller is subjected to cryogenic treatment after quenching, a matched cryogenic device is used, and a transverse feeding mode is adopted, so that the roller is more convenient to feed, and the feeding time is greatly saved. Adopt the mode of rotary transportation air conditioning, roll rotation simultaneously for the roll is refrigerated more evenly, avoids the liquid nitrogen to directly spout and causes the partial cooling transition in roll surface. The dipping liquid strips are ingeniously provided with the fine liquid storage tank to store a small amount of liquid nitrogen, the cold source quantity carried by each dipping liquid strip entering the liquid storage tank every time is guaranteed, and the refrigeration effect is guaranteed; and meanwhile, the situation that liquid nitrogen is thrown out and directly falls onto the roller due to the running shake of the cold source conveying mechanism is effectively prevented. The driving mechanism adopts chain gear transmission and is matched with the tensioning gear, so that the roller is conveniently connected into the driving mechanism, and the equipment cost is saved.
Description
Technical Field
The invention relates to the field of rollers, in particular to a roller manufacturing method of a lithium battery pole piece rolling mill
Background
Rolling the lithium battery pole piece by a rolling mill; the compacted density of the pole pieces has an important influence on the electrochemical performance of the battery. Within a certain range, along with the increase of the compaction density, the distance between active material particles is reduced, the contact area is increased, the number of paths and bridges which are beneficial to ion conduction is increased, and the internal resistance of the battery is reduced in a macroscopic aspect. However, if the compacted density of the electrode sheet is too high, the contact degree between the active material particles is too close, and the electronic conductivity is increased. However, since the lithium ion channel is decreased or clogged, the capacity is not exhibited, and when the discharge is performed, the polarization is increased, the voltage is lowered, and the capacity is lowered. When the compaction density is too small, the particle distance is large, the lithium ion moving channel is smooth, the liquid absorption capacity of the electrolyte is strong, the lithium ion moving inside the battery is facilitated, but because the contact degree between the particles is not tight enough, the lithium ion moving channel is not conducive to conducting of electrons, and when the lithium ion moving channel discharges, the polarization is increased easily. Therefore, the hardness of the surface of the roller needs to be uniform, if not, the compaction density of a part of regions is too high, and the compaction density of a part of regions is too low, so that the rolling quality of the pole piece cannot be ensured.
The Chinese patent CN 109609852B describes the structure of a cryogenic device in the preparation method of a leveler and a finisher work roll, but the roll needs to be put in the top of the cryogenic device, is very inconvenient to take and needs to be lifted by means of tools such as a crane and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention mainly aims at overcoming the defects in the prior art, and discloses a roller manufacturing method of a lithium battery pole piece rolling mill, which comprises the following steps:
1) raw materials, the components by weight percentage are as follows: 0.95-1.05 wt%, silicon: 0.3-0.4 wt%, manganese: 0.35-1.2 wt%, phosphorus: less than or equal to 0.02 wt%, sulfur: less than or equal to 0.01 wt%, chromium: 2.8-3.2 wt%, nickel: less than or equal to 0.2 wt%, molybdenum: 0.2-0.4 wt%, copper: less than or equal to 0.25 wt%, and the balance of iron and other impurities;
2) smelting the raw materials in a medium-frequency induction furnace, fully stirring, wherein the smelting temperature is 1600-1800 ℃, and the smelting time is 30-40 minutes to prepare alloy liquid;
2) opening a pouring hole of the medium-frequency induction furnace, and pouring alloy liquid into a metal mold;
3) after the metal die is completely cooled, removing the metal die to form a blank;
4) forging and forming the blank on a press;
5) carrying out ultrasonic flaw detection after annealing;
6) rough turning and ultrasonic flaw detection;
7) semi-finishing and ultrasonic flaw detection;
8) quenching;
9) carrying out cryogenic treatment;
10) defrosting and tempering;
11) fine processing, secondary tempering and ultrasonic flaw detection;
12) detecting and warehousing;
wherein, in the subzero treatment of the step 9), the roller after quenching is put into a subzero treatment device, the temperature is between-180 and-185 ℃, and the temperature is kept for 4 to 5 hours;
the cryogenic treatment device comprises a cryogenic tank, a liquid storage tank, a movable support, a locking mechanism, a driving mechanism and a cold source conveying mechanism; the cryogenic box is arranged on the ground, the liquid storage tank is arranged underground and is positioned below the cryogenic box, the roller is rotatably arranged on the movable support to facilitate the roller to move in or out of the cryogenic box, the cold source conveying mechanism is arranged in the cryogenic box and is connected with the driving mechanism, the driving mechanism is used for driving the cold source conveying mechanism to operate, liquid nitrogen in the liquid storage tank is moved in the cryogenic box, and meanwhile, the roller is driven to rotate;
the cold source conveying mechanism comprises a rotating shaft, a driving wheel, a driven wheel, transmission chains, connecting rods and liquid dipping strips, wherein the rotating shaft is respectively and rotatably arranged in the deep cooling box and the liquid storage tank from top to bottom, the driving wheel and the driven wheel are respectively arranged on the rotating shaft at intervals, the transmission chains are connected with the driving wheel and the driven wheel, a plurality of connecting rods are connected between the two transmission chains, and the liquid dipping strips are rotatably arranged on the connecting rods; and the rotating shaft is connected with the driving mechanism, and the driving mechanism is used for driving the driving wheel to rotate.
Further, dip in the liquid strip and be the bar body, just bar body upper surface has the arc surface, the both ends of bar body extend upwards and set up the installation pole, and the installation pole with the connecting rod rotates to be connected.
Furthermore, a thin liquid storage tank is concavely arranged on the upper surface of the strip-shaped body.
Further, the movable support comprises a support body and a universal wheel arranged below the support body; the roller mounting device comprises a support body, wherein two ends of the support body are respectively provided with a mounting mechanism which is used for being rotatably connected with a roller, each mounting mechanism comprises a mounting base, a locking base and a fixing bolt, the locking bases are hinged to the mounting bases, and the fixing bolts are used for fixing during locking; two bearings are arranged on the mounting base at intervals, one bearing is arranged on the locking seat, and the three bearings are distributed in a regular triangle shape; when the mounting mechanism is connected with the roller, three bearings act on the roller.
Further, the refrigerator further comprises a locking mechanism, and when the movable support is placed in the refrigerator, the movable support and the refrigerator are fixed through the locking mechanism.
Furthermore, the locking mechanism comprises a locking bolt and a locking nut, the movable support is provided with a unthreaded hole, a screw hole matched with the locking bolt is arranged at the corresponding position of the cryogenic box, one end of the locking bolt penetrates through the unthreaded hole to be in threaded fit with the screw hole, and the locking nut is arranged on the locking bolt to lock the locking bolt.
Furthermore, at least two groups of locking mechanisms are arranged on each side of each end of the movable support at intervals up and down and fixed with the cryogenic box.
Furthermore, two ends of the cryogenic box are provided with horizontally moving sliding doors.
Further, the driving mechanism comprises a motor, a speed reducer, a driving gear, a first driven gear, a second driven gear, a tensioning mechanism and a chain, the motor is connected with the driving gear through the speed reducer, the first driven gear is installed on the rotating shaft, the second driven gear is installed on the roller, the chain is connected with the driving gear and the first driven gear, the second driven gear is meshed with the chain, the tensioning gear is meshed with the chain and is connected with the tensioning mechanism, and the tensioning mechanism is used for adjusting the position of the tensioning gear to tension the chain.
Further, the pulling-in mechanism comprises a tension meter and an electric cylinder.
The invention has the following beneficial effects:
1) the invention prepares the roller which meets the requirements of the lithium battery pole piece rolling mill by adjusting the material components; and through the ultra-long tempering treatment and the deep cooling treatment, the roller can achieve the required strength, wear resistance and uniformity.
2) The cryogenic device adopts a transverse feeding mode, so that the roller is more convenient to feed, and the feeding time is greatly saved. Adopt the mode of rotary transportation air conditioning, roll rotation simultaneously for the roll is refrigerated more evenly, avoids the liquid nitrogen to directly spout and causes the partial cooling transition in roll surface.
3) The dipping liquid strips are ingeniously provided with the fine liquid storage tank to store a small amount of liquid nitrogen, the cold source quantity carried by each dipping liquid strip entering the liquid storage tank every time is guaranteed, and the refrigeration effect is guaranteed; and meanwhile, the situation that liquid nitrogen is thrown out and directly falls onto the roller due to the running shake of the cold source conveying mechanism is effectively prevented.
4) The driving mechanism adopts chain gear transmission and is matched with the tensioning gear, so that the roller is conveniently connected into the driving mechanism, and the equipment cost is saved.
Drawings
FIG. 1 is a front view of a cryogenic device of the present invention;
FIG. 2 is a schematic diagram of the structure of a cryogenic plant;
FIG. 3 is a schematic structural diagram of a cooling source conveying mechanism;
FIG. 4 is a schematic view of a dip strip configuration;
FIG. 5 is a schematic structural view of a mobile carriage;
FIG. 6 is a schematic structural view of the mounting mechanism;
FIG. 7 is a schematic view of the sliding door and the cryogenic box;
FIG. 8 is a schematic view of the driving mechanism;
the reference numbers are as follows:
1. the refrigerator comprises a cryogenic box, 2, a liquid storage tank, 3, a movable support, 4, a locking mechanism, 5, a driving mechanism, 6, a cold source conveying mechanism, 11, a sliding door 31, a support body, 32, a universal wheel, 33, an installation mechanism, 34, a light hole, 51, a motor, 52, a speed reducer, 53, a driving gear, 54, a first driven gear, 55, a second driven gear, 56, a tensioning gear, 57, a tensioning mechanism, 58, a chain, 61, a rotating shaft, 62, a transmission wheel, 63, a driven wheel, 64, a transmission chain, 65, a connecting rod, 66, a liquid dipping bar, 67, an arc surface, 68, a fine liquid storage tank, 331, an installation base, 332, a locking base, 333, a fixing bolt, 334, a bearing, 571, an electric cylinder, 572 and a tension meter.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Carbon in percentage by weight: 0.95 wt%, silicon: 0.4 wt%, manganese: 0.35 wt%, phosphorus: 0.02 wt%, sulfur: 0.01 wt%, chromium: 2.8 wt%, nickel: 0.2 wt%, molybdenum: 0.2 wt%, copper: 0.25 wt%, with the balance being iron and other impurities, and preparing a casting material.
Smelting an alloy solution: the components are placed in a medium frequency induction furnace according to the weight ratio for smelting, the smelting temperature is 1600 ℃, the smelting time is 30 minutes, and alloy solution is prepared.
And (3) detection: and detecting the smelted alloy liquid by adopting a spectral analysis method, and determining that the components are in the range.
Casting and cold cogging: and opening the pouring hole of the power frequency heat preservation furnace, pouring the alloy liquid into a metal mold, and removing the metal mold after complete cooling.
Washing and forging: removing surface residues and oxides through an acid washing and scrubbing process, and forging and forming on a press.
Annealing and ultrasonic flaw detection: after annealing, the part defect is inspected by using the characteristic that ultrasonic energy penetrates into the depth of the metal material and is reflected at the edge of an interface when entering another section from one section. Then, rough turning was performed, and the ultrasonic flaw detection was repeated.
Then performing semi-finishing and ultrasonic flaw detection: according to the requirements of processing drawings, semi-finishing is carried out on a lathe, ultrasonic energy is utilized to penetrate into the depth of a metal material, and when the metal material enters another section from the section, the defect of the part is detected by the characteristic that reflection occurs at the edge of the interface. And then quenching is carried out.
Quenching: when a preheated roller passes through an electrified induction coil on a quenching machine tool, induction current is formed on the surface of the roller due to electromagnetic induction, so that the surface is heated, the heating temperature is adjusted by temperature measurement feedback adjustment power, the surface of the roller obtains a certain depth of a hardening layer and good hardness uniformity, the internal stress of the roller is reduced through medium-temperature tempering, the peeling of the roller in use is reduced, and the usability of the intermediate roller is greatly improved.
The quenching temperature was 960 degrees. Then, the deep cooling treatment is carried out.
Cryogenic treatment: the process comprises the steps of placing the roller before tempering after quenching into a cryogenic treatment device at-180 ℃ for cryogenic heat preservation for 4 hours, and transforming part of residual austenite into martensite through cryogenic treatment along with the increase of the alloy content in the roller, so that the cryogenic treatment of the roller is the continuation of quenching, and poor toughness is caused due to the increase of chromium content, and on the basis of the chromium and carbon content of the invention, the cryogenic temperature of-180 to-190 ℃ can reduce the residual austenite content in the roller, thereby achieving the wear resistance and high hardness of the surface of the roller and improving the depth of a hardening layer, simultaneously increasing the toughness, improving the spalling resistance of the roller in later use and reducing the risk of roller fracture.
Then defrosting and tempering: tempering at 100 ℃ after defrosting, and the tempering time is 60 hours.
Finishing finish machining, secondary tempering and ultrasonic flaw detection: after finish turning, secondary tempering is carried out, wherein the tempering temperature is 100 ℃, and the tempering time is 180 hours. The defect of the part is inspected by utilizing the characteristic that ultrasonic energy penetrates into the deep part of the metal material and is reflected at the edge of an interface when entering another section from one section.
According to the roller prepared by the production process, the depth of a hardening layer reaches 35mm, the surface hardness of a roller body reaches 101HSD, the hardness uniformity is less than 1HSD, and the roller can be used for rolling a working roller of a lithium battery pole piece.
Example 2
Carbon in percentage by weight: 1.05 wt%, silicon: 0.3 wt%, manganese: 1.2 wt%, phosphorus: 0.015 wt%, sulfur: 0.01 wt%, chromium: 3.2 wt%, nickel: 0.015 wt%, molybdenum: 0.4 wt%, copper: 0.25 wt%, with the balance being iron and other impurities, and preparing a casting material.
Smelting an alloy solution: the components are placed in a medium frequency induction furnace according to the weight ratio for smelting, the smelting temperature is 1600 ℃, the smelting time is 30 minutes, and alloy solution is prepared.
And (3) detection: and detecting the smelted alloy liquid by adopting a spectral analysis method, and determining that the components are in the range.
Casting and cold cogging: and opening the pouring hole of the power frequency heat preservation furnace, pouring the alloy liquid into a metal mold, and removing the metal mold after complete cooling.
Washing and forging: removing surface residues and oxides through an acid washing and scrubbing process, and forging and forming on a press.
Annealing and ultrasonic flaw detection: after annealing, the part defect is inspected by using the characteristic that ultrasonic energy penetrates into the depth of the metal material and is reflected at the edge of an interface when entering another section from one section. Then, rough turning was performed, and the ultrasonic flaw detection was repeated.
Then performing semi-finishing and ultrasonic flaw detection: according to the requirements of processing drawings, semi-finishing is carried out on a lathe, ultrasonic energy is utilized to penetrate into the depth of a metal material, and when the metal material enters another section from the section, the defect of the part is detected by the characteristic that reflection occurs at the edge of the interface. And then quenching is carried out.
Quenching: when a preheated roller passes through an electrified induction coil on a quenching machine tool, induction current is formed on the surface of the roller due to electromagnetic induction, so that the surface is heated, the heating temperature is adjusted by temperature measurement feedback adjustment power, the surface of the roller obtains a certain depth of a hardening layer and good hardness uniformity, the internal stress of the roller is reduced through medium-temperature tempering, the peeling of the roller in use is reduced, and the usability of the intermediate roller is greatly improved.
The quenching temperature was 960 degrees. Then, the deep cooling treatment is carried out.
Cryogenic treatment: the process comprises the step of placing the roller before tempering after quenching into a cryogenic treatment device at-185 ℃ for cryogenic heat preservation for 4 hours, wherein part of residual austenite is converted into martensite through cryogenic treatment along with the increase of the alloy content in the roller, so that the cryogenic treatment of the roller is the continuation of quenching, the poor toughness is caused due to the increase of the chromium content, and on the basis of the chromium and carbon content of the invention, the cryogenic temperature of-180-190 ℃ can reduce the residual austenite content in the roller, thereby achieving the wear resistance and high hardness of the surface of the roller and improving the depth of a hardening layer, simultaneously increasing the toughness, improving the spalling resistance of the roller in later use and reducing the risk of roller fracture.
Then defrosting and tempering: tempering at 100 ℃ after defrosting, and the tempering time is 60 hours.
Finishing finish machining, secondary tempering and ultrasonic flaw detection: after finish turning, secondary tempering is carried out, wherein the tempering temperature is 100 ℃, and the tempering time is 180 hours. The defect of the part is inspected by utilizing the characteristic that ultrasonic energy penetrates into the deep part of the metal material and is reflected at the edge of an interface when entering another section from one section.
According to the roller prepared by the production process, the depth of a hardening layer reaches 35mm, the surface hardness of a roller body reaches 99HSD, the hardness uniformity is less than 1HSD, and the roller can be used for rolling a working roller of a lithium battery pole piece.
Example 3
Carbon in percentage by weight: 1 wt%, silicon: 0.33 wt%, manganese: 0.65 wt%, phosphorus: 0.015 wt%, sulfur: 0.01 wt%, chromium: 2.95 wt%, nickel: 0.2 wt%, molybdenum: 0.25 wt%, copper: 0.25 wt%, with the balance being iron and other impurities, and preparing a casting material.
Smelting an alloy solution: the components are placed into a medium frequency induction furnace according to the weight ratio for smelting, the smelting temperature is 1700 ℃, and the smelting time is 40 minutes, so that alloy solution is prepared.
And (3) detection: and detecting the smelted alloy liquid by adopting a spectral analysis method, and determining that the components are in the range.
Casting and cold cogging: and opening the pouring hole of the power frequency heat preservation furnace, pouring the alloy liquid into a metal mold, and removing the metal mold after complete cooling.
Washing and forging: removing surface residues and oxides through an acid washing and scrubbing process, and forging and forming on a press.
Annealing and ultrasonic flaw detection: after annealing, the part defect is inspected by using the characteristic that ultrasonic energy penetrates into the depth of the metal material and is reflected at the edge of an interface when entering another section from one section. Then, rough turning was performed, and the ultrasonic flaw detection was repeated.
Then performing semi-finishing and ultrasonic flaw detection: according to the requirements of processing drawings, semi-finishing is carried out on a lathe, ultrasonic energy is utilized to penetrate into the depth of a metal material, and when the metal material enters another section from the section, the defect of the part is detected by the characteristic that reflection occurs at the edge of the interface. And then quenching is carried out.
Quenching: when a preheated roller passes through an electrified induction coil on a quenching machine tool, induction current is formed on the surface of the roller due to electromagnetic induction, so that the surface is heated, the heating temperature is adjusted by temperature measurement feedback adjustment power, the surface of the roller obtains a certain depth of a hardening layer and good hardness uniformity, the internal stress of the roller is reduced through medium-temperature tempering, the peeling of the roller in use is reduced, and the usability of the intermediate roller is greatly improved.
The quenching temperature was 960 degrees. Then, the deep cooling treatment is carried out.
Cryogenic treatment: the process comprises the steps of placing the roller before tempering after quenching into a cryogenic treatment device at-180 ℃ for cryogenic heat preservation for 5 hours, and transforming part of residual austenite into martensite through cryogenic treatment along with the increase of the alloy content in the roller, so that the cryogenic treatment of the roller is the continuation of quenching, and poor toughness is caused due to the increase of chromium content, and on the basis of the chromium and carbon content of the invention, the cryogenic temperature of-180 to-190 ℃ can reduce the residual austenite content in the roller, thereby achieving the wear resistance and high hardness of the surface of the roller and improving the depth of a hardening layer, simultaneously increasing the toughness, improving the spalling resistance of the roller in later use and reducing the risk of roller fracture.
Then defrosting and tempering: tempering at 100 ℃ after defrosting, and the tempering time is 60 hours.
Finishing finish machining, secondary tempering and ultrasonic flaw detection: after finish turning, secondary tempering is carried out, wherein the tempering temperature is 100 ℃, and the tempering time is 180 hours. The defect of the part is inspected by utilizing the characteristic that ultrasonic energy penetrates into the deep part of the metal material and is reflected at the edge of an interface when entering another section from one section.
According to the roller prepared by the production process, the depth of a hardening layer reaches 35mm, the surface hardness of a roller body reaches 100HSD, the hardness uniformity is less than 1HSD, and the roller can be used for rolling a working roller of a lithium battery pole piece.
Example 4
Carbon in percentage by weight: 1.01 wt%, silicon: 0.35 wt%, manganese: 1 wt%, phosphorus: 0.02 wt%, sulfur: 0.01 wt%, chromium: 3 wt%, nickel: 0.2 wt%, molybdenum: 0.25 wt%, copper: 0.25 wt%, with the balance being iron and other impurities, and preparing a casting material.
Smelting an alloy solution: the components are placed into a medium frequency induction furnace according to the weight ratio for smelting, the smelting temperature is 1700 ℃, and the smelting time is 40 minutes, so that alloy solution is prepared.
And (3) detection: and detecting the smelted alloy liquid by adopting a spectral analysis method, and determining that the components are in the range.
Casting and cold cogging: and opening the pouring hole of the power frequency heat preservation furnace, pouring the alloy liquid into a metal mold, and removing the metal mold after complete cooling.
Washing and forging: removing surface residues and oxides through an acid washing and scrubbing process, and forging and forming on a press.
Annealing and ultrasonic flaw detection: after annealing, the part defect is inspected by using the characteristic that ultrasonic energy penetrates into the depth of the metal material and is reflected at the edge of an interface when entering another section from one section. Then, rough turning was performed, and the ultrasonic flaw detection was repeated.
Then performing semi-finishing and ultrasonic flaw detection: according to the requirements of processing drawings, semi-finishing is carried out on a lathe, ultrasonic energy is utilized to penetrate into the depth of a metal material, and when the metal material enters another section from the section, the defect of the part is detected by the characteristic that reflection occurs at the edge of the interface. And then quenching is carried out.
Quenching: when a preheated roller passes through an electrified induction coil on a quenching machine tool, induction current is formed on the surface of the roller due to electromagnetic induction, so that the surface is heated, the heating temperature is adjusted by temperature measurement feedback adjustment power, the surface of the roller obtains a certain depth of a hardening layer and good hardness uniformity, the internal stress of the roller is reduced through medium-temperature tempering, the peeling of the roller in use is reduced, and the usability of the intermediate roller is greatly improved.
The quenching temperature was 960 degrees. Then, the deep cooling treatment is carried out.
Cryogenic treatment: the process comprises the steps of placing the roller before tempering after quenching into a cryogenic treatment device at-180 ℃ for cryogenic heat preservation for 5 hours, and transforming part of residual austenite into martensite through cryogenic treatment along with the increase of the alloy content in the roller, so that the cryogenic treatment of the roller is the continuation of quenching, and poor toughness is caused due to the increase of chromium content, and on the basis of the chromium and carbon content of the invention, the cryogenic temperature of-180 to-190 ℃ can reduce the residual austenite content in the roller, thereby achieving the wear resistance and high hardness of the surface of the roller and improving the depth of a hardening layer, simultaneously increasing the toughness, improving the spalling resistance of the roller in later use and reducing the risk of roller fracture.
Then defrosting and tempering: tempering at 150 ℃ after defrosting, and the tempering time is 60 hours.
Finishing finish machining, secondary tempering and ultrasonic flaw detection: after finish turning, secondary tempering is carried out, wherein the tempering temperature is 120 ℃, and the tempering time is 180 hours. The defect of the part is inspected by utilizing the characteristic that ultrasonic energy penetrates into the deep part of the metal material and is reflected at the edge of an interface when entering another section from one section.
According to the roller prepared by the production process, the depth of the hardening layer reaches 37mm, the surface hardness of the roller body reaches 101HSD, the hardness uniformity is less than 1HSD, and the roller can be used for rolling a working roller of a lithium battery pole piece.
Example 5
Carbon in percentage by weight: 1.01 wt%, silicon: 0.37 wt%, manganese: 1.1 wt%, phosphorus: 01015 wt%, sulfur: 0.01 wt%, chromium: 3.2 wt%, nickel: 0.2 wt%, molybdenum: 0.4 wt%, copper: 0.25 wt%, with the balance being iron and other impurities, and preparing a casting material.
Smelting an alloy solution: the components are placed into a medium frequency induction furnace according to the weight ratio for smelting, the smelting temperature is 1800 ℃, the smelting time is 40 minutes, and alloy solution is prepared.
And (3) detection: and detecting the smelted alloy liquid by adopting a spectral analysis method, and determining that the components are in the range.
Casting and cold cogging: and opening the pouring hole of the power frequency heat preservation furnace, pouring the alloy liquid into a metal mold, and removing the metal mold after complete cooling.
Washing and forging: removing surface residues and oxides through an acid washing and scrubbing process, and forging and forming on a press.
Annealing and ultrasonic flaw detection: after annealing, the part defect is inspected by using the characteristic that ultrasonic energy penetrates into the depth of the metal material and is reflected at the edge of an interface when entering another section from one section. Then, rough turning was performed, and the ultrasonic flaw detection was repeated.
Then performing semi-finishing and ultrasonic flaw detection: according to the requirements of processing drawings, semi-finishing is carried out on a lathe, ultrasonic energy is utilized to penetrate into the depth of a metal material, and when the metal material enters another section from the section, the defect of the part is detected by the characteristic that reflection occurs at the edge of the interface. And then quenching is carried out.
Quenching: when a preheated roller passes through an electrified induction coil on a quenching machine tool, induction current is formed on the surface of the roller due to electromagnetic induction, so that the surface is heated, the heating temperature is adjusted by temperature measurement feedback adjustment power, the surface of the roller obtains a certain depth of a hardening layer and good hardness uniformity, the internal stress of the roller is reduced through medium-temperature tempering, the peeling of the roller in use is reduced, and the usability of the intermediate roller is greatly improved.
The quenching temperature was 960 degrees. Then, the deep cooling treatment is carried out.
Cryogenic treatment: the process comprises the step of placing the roller before tempering after quenching into a subzero treatment device at-185 ℃ for subzero heat preservation for 5 hours, wherein part of residual austenite is converted into martensite through subzero treatment along with the increase of the alloy content in the roller, so that the subzero treatment of the roller is the continuation of quenching, the poor toughness is caused due to the increase of the chromium content, and the subzero temperature of-180-190 ℃ can reduce the residual austenite content in the roller on the basis of the chromium and carbon content of the invention, thereby achieving the wear resistance and high hardness of the surface of the roller and improving the depth of a hardening layer, simultaneously increasing the toughness, improving the spalling resistance of the roller in later use and reducing the risk of roller fracture.
Then defrosting and tempering: tempering at 150 ℃ after defrosting, and the tempering time is 60 hours.
Finishing finish machining, secondary tempering and ultrasonic flaw detection: after finish turning, secondary tempering is carried out, wherein the tempering temperature is 120 ℃, and the tempering time is 180 hours. The defect of the part is inspected by utilizing the characteristic that ultrasonic energy penetrates into the deep part of the metal material and is reflected at the edge of an interface when entering another section from one section.
According to the roller prepared by the production process, the depth of the hardening layer reaches 37mm, the surface hardness of the roller body reaches 101HSD, the hardness uniformity is less than 1HSD, and the roller can be used for rolling a working roller of a lithium battery pole piece.
As shown in fig. 1-2, the cryogenic treatment device comprises a cryogenic tank 1, a liquid storage tank 2, a movable support 3, a driving mechanism 5 and a cold source conveying mechanism 6; the cryogenic box 1 is arranged on the ground, the liquid storage tank 2 is arranged underground and is positioned below the cryogenic box 1, the roller is rotatably arranged on the movable support 3 so as to be convenient for the roller to move in or out of the cryogenic box 1, the cold source conveying mechanism 6 is arranged in the cryogenic box 1 and is connected with the driving mechanism 5, the driving mechanism 5 is utilized to drive the cold source conveying mechanism 6 to operate, liquid nitrogen in the liquid storage tank 2 is moved in the cryogenic box 1, and meanwhile, the roller is driven to rotate; namely, the driving mechanism 5 drives the roller and the cold source conveying mechanism 6 simultaneously.
Specifically, as shown in fig. 1-3, the cold source conveying mechanism 6 includes a rotating shaft 61, a driving wheel 62, a driven wheel 63, a transmission chain 64, a connecting rod 65 and a liquid dipping bar 66, a channel allowing the cold source conveying groove 6 to run and connecting the cryogenic box 1 and the liquid storage tank 2 is arranged on the bottom surface, two rotating shafts 61 are arranged and respectively rotatably arranged in the cryogenic box 1 and the liquid storage tank 2, the driving wheels 62 are arranged on the rotating shaft 61 in the cryogenic box 1 at intervals, the driven wheel 63 is arranged on the rotating shaft 61 in the liquid storage tank 2, and the driving wheel 62 corresponds to the driven wheel 63 in position and is connected with the driven wheel 64. The adjacent transmission chains 64 are connected through a plurality of connecting rods 65, and the dipping liquid strips 66 are rotatably arranged on the connecting rods 65. The pivot 61 in the deep cooling case 1 extends to one end and is connected with actuating mechanism, drive pivot 61 through actuating mechanism and rotate, and then drive from driving wheel 63 rotation through drive wheel 62, and then drive driving chain 64 is circular motion, the drive dips in liquid bar 66 and gets into in the liquid nitrogen of liquid storage tank 2, and bring air conditioning into in the deep cooling case 1, make the air conditioning in the deep cooling case 1 more even through above-mentioned mode, and avoid the liquid nitrogen to directly spout and cause the roller part supercooling and then influence the homogeneity of the roll surface of rolling the rod.
In the above embodiment, as shown in fig. 4, the dip stick 66 is a bar-shaped body, the upper surface of the bar-shaped body has an arc surface 67, two ends of the bar-shaped body extend upwards to form mounting rods, and the mounting rods are rotatably connected with the connecting rod 65. Through arc surface 67 for the liquid nitrogen that is attached to and dips in liquid strip 66 surface can fall into liquid storage tank 2 along arc surface 67, avoids when dipping in liquid strip 66 and removes to directly drip the liquid nitrogen on the roller like cryogenic box 1, causes the local subcooling of roll. Preferably, a thin reservoir 68 is recessed into the upper surface of the bar. Capillary action is used to draw a small volume of liquid nitrogen into the reservoir 68 and does not migrate out of the reservoir 68 during minor sloshing. The liquid nitrogen is prevented from directly falling into the roller while the temperature of the cryogenic box 1 is ensured. Wherein the thin reservoir 68 is shown enlarged in figure 4 for clarity.
In one embodiment, as shown in fig. 5 and 6, the moving bracket 3 includes a bracket body 31 and a universal wheel 32 disposed below the bracket body 31; the two ends of the bracket body 31 are respectively provided with an installation mechanism 33 which is used for being rotationally connected with the roller, the installation mechanism 33 comprises an installation base 331, a locking base 332 and a fixing bolt 333, the locking base 332 is hinged on the installation base 331, and when the locking is carried out, the fixing bolt 333 is used for fixing; two bearings 334 are arranged on the mounting base 331 at intervals, one bearing 334 is arranged on the locking base 332, and the three bearings 334 are distributed in a regular triangle; when the mounting mechanism 33 is connected to the roll, the three bearings act on the roll; the roll is restrained and supported by three bearings 334.
In one embodiment, as shown in fig. 1, 2 and 5, the refrigerator further comprises a locking mechanism 4, and when the movable bracket 3 is placed in the refrigerator, the movable bracket 3 is fixed with the refrigerator 1 by the locking mechanism 4. So that the mobile carriage 3 is integral with the cryogenic tank 1. Specifically, the locking mechanism 4 includes a locking bolt 41 and a locking nut 42, the movable bracket 3 is provided with an unthreaded hole 34, the corresponding position of the cryogenic box 1 is provided with a threaded hole matched with the locking bolt 41, one end of the locking bolt 41 passes through the unthreaded hole 34 to be in threaded fit with the threaded hole, and the locking nut 42 is arranged on a locking bolt 43 to lock the locking bolt 41. Wherein, in order to improve the joint strength between the movable support 3 and the cryogenic box 1, at least two sets of locking mechanisms 4 are arranged on each side of each end of the movable support 3 at intervals up and down and fixed with the cryogenic box 1.
In one embodiment, as shown in fig. 7, sliding doors 11 are provided at both ends of the deep cooling box 1 to move horizontally. When the roller is loaded, the sliding door 11 is horizontally moved, so that the movable support 3 can conveniently enter the cryogenic box 1; after the movable support 3 is fixed, the sliding door 11 is closed, so that the cryogenic box 1 is a relatively closed space, and the overflow of cold air is reduced. Wherein, because of the very low temperature in the cryogenic tank 1, actuating mechanism 5 sets up outside cryogenic tank 1, and actuating mechanism 5 needs to be connected with pivot 61 and the roll in cryogenic tank 1, consequently, sliding door 11 sets up to two door structures to set up the opening at sliding door 11 lateral wall, make sliding door 11 can close.
As shown in fig. 8, the driving mechanism 5 is provided at one end of the cryogenic box 1. Specifically, the driving mechanism 5 includes a motor 51 disposed on the mounting bracket, a speed reducer 52, a driving gear 53, a first driven gear 54, a second driven gear 55, a tensioning gear 56, a tensioning mechanism 57 and a chain 58, the motor 51 is connected with the driving gear 53 through the speed reducer 52, one end of a rotating shaft 61 located in the deep cooling box 1 passes through an opening of the sliding door 11 and extends to the outside of the deep cooling box 1, the first driven gear 54 is mounted, the second driven gear 55 is mounted on the roller, the chain 58 is connected with the driving gear 53 and the first driven gear 54, the driving gear 53 drives the first driven gear 54 to drive the rotating shaft to rotate, and then the cold source conveying mechanism 6 is driven to operate. When the roller is mounted on the moving carriage 3 and fixed in the deep cooling box 1, the chain 58 is engaged with the second driven gear 55 to rotate the roller. The tensioning gear 56 is also engaged with the chain 58 and is connected to a tensioning mechanism 57, and the position of the tensioning gear 56 is adjusted by the tensioning mechanism 57 to tension the chain 58. When the roller is used, after the roller is placed in the cryogenic box 1 and fixed, the tensioning gear 56 is driven by the tensioning mechanism 57 to move so that the chain 58 is in a loose state, a worker connects the chain 58 with the driving gear 53, the first driven gear 54, the second driven gear 55 and the tensioning gear 56, then the position of the tensioning gear 56 is adjusted by the tensioning mechanism 57 so that the chain 58 is tensioned, and then power is transmitted to the rotating shaft and the roller through the chain 58 respectively so as to drive the rotating shaft and the roller to rotate. The tensioning mechanism 57 includes an electric cylinder 571 and a tension meter 572, and the operating position of the tensioning gear 56 can be visually determined according to the vertical direction by the tension meter 572.
The method of using the cryogenic device is fully explained below; as shown in fig. 1-8, firstly, the roller is hoisted to the movable support 3 by the crane, then the roller is fixed by the installation mechanism 33, so that the roller is rotatably connected with the movable support 3, meanwhile, the second driven gear 55 is installed at one end of the roller, the sliding door 11 of the cryogenic box 1 is opened, the movable support 3 is pushed into the cryogenic box 1, then the movable support is fixedly connected with the cryogenic box 1 by the locking mechanism 4, one end where the second driven gear 55 is installed extends into the driving mechanism 5, after the worker connects the chain 58 with the driving gear 53, the first driven gear 54, the second driven gear 55 and the tensioning gear 56, the driving tensioning mechanism 57 tightens the chain 58, and then the chain 58 is driven by the motor to rotate so as to drive the cold source conveying mechanism 6 to operate, and at the same time, the roller rotates. Wherein the rotational speed between the first driven gear 54 and the second driven gear 55 can be adjusted by adjusting the difference in the number of teeth therebetween.
The above are merely preferred embodiments of the present invention, and are not intended to limit the scope of the invention; it is intended that the following claims be interpreted as including all such alterations, modifications, and equivalents as fall within the true spirit and scope of the invention.
Claims (10)
1. A roller manufacturing method of a lithium battery pole piece rolling mill is characterized by comprising the following steps:
1) raw materials, the components by weight percentage are as follows: 0.95-1.05 wt%, silicon: 0.3-0.4 wt%, manganese: 0.35-1.2 wt%, phosphorus: less than or equal to 0.02 wt%, sulfur: less than or equal to 0.01 wt%, chromium: 2.8-3.2 wt%, nickel: less than or equal to 0.2 wt%, molybdenum: 0.2-0.4 wt%, copper: less than or equal to 0.25 wt%, and the balance of iron and other impurities;
2) smelting the raw materials in a medium-frequency induction furnace, fully stirring, wherein the smelting temperature is 1600-1800 ℃, and the smelting time is 30-40 minutes to prepare alloy liquid;
2) opening a pouring hole of the medium-frequency induction furnace, and pouring alloy liquid into a metal mold;
3) after the metal die is completely cooled, removing the metal die to form a blank;
4) forging and forming the blank on a press;
5) carrying out ultrasonic flaw detection after annealing;
6) rough turning and ultrasonic flaw detection;
7) semi-finishing and ultrasonic flaw detection;
8) quenching;
9) carrying out cryogenic treatment;
10) defrosting and tempering;
11) fine processing, secondary tempering and ultrasonic flaw detection;
12) detecting and warehousing;
wherein, in the subzero treatment of the step 9), the roller after quenching is put into a subzero treatment device, the temperature is between-180 and-185 ℃, and the temperature is kept for 4 to 5 hours;
the cryogenic treatment device comprises a cryogenic tank, a liquid storage tank, a movable support, a locking mechanism, a driving mechanism and a cold source conveying mechanism; the cryogenic box is arranged on the ground, the liquid storage tank is arranged underground and is positioned below the cryogenic box, the roller is rotatably arranged on the movable support to facilitate the roller to move in or out of the cryogenic box, the cold source conveying mechanism is arranged in the cryogenic box and is connected with the driving mechanism, the driving mechanism is used for driving the cold source conveying mechanism to operate, liquid nitrogen in the liquid storage tank is moved in the cryogenic box, and meanwhile, the roller is driven to rotate;
the cold source conveying mechanism comprises a rotating shaft, a driving wheel, a driven wheel, transmission chains, connecting rods and liquid dipping strips, wherein the rotating shaft is respectively and rotatably arranged in the deep cooling box and the liquid storage tank from top to bottom, the driving wheel and the driven wheel are respectively arranged on the rotating shaft at intervals, the transmission chains are connected with the driving wheel and the driven wheel, a plurality of connecting rods are connected between the two transmission chains, and the liquid dipping strips are rotatably arranged on the connecting rods; and the rotating shaft is connected with the driving mechanism, and the driving mechanism is used for driving the driving wheel to rotate.
2. The method for manufacturing the roller of the lithium battery pole piece rolling mill as claimed in claim 1, wherein the liquid dipping bar is a bar-shaped body, the upper surface of the bar-shaped body is provided with an arc surface, two ends of the bar-shaped body extend upwards to form mounting rods, and the mounting rods are rotatably connected with the connecting rods.
3. The method for manufacturing the roller of the lithium battery pole piece rolling mill as claimed in claim 2, wherein the upper surface of the strip-shaped body is concavely provided with a fine liquid storage tank.
4. The roller manufacturing method of the lithium battery pole piece rolling mill according to claim 1, wherein the movable support comprises a support body and a universal wheel arranged below the support body; the roller mounting device comprises a support body, wherein two ends of the support body are respectively provided with a mounting mechanism which is used for being rotatably connected with a roller, each mounting mechanism comprises a mounting base, a locking base and a fixing bolt, the locking bases are hinged to the mounting bases, and the fixing bolts are used for fixing during locking; two bearings are arranged on the mounting base at intervals, one bearing is arranged on the locking seat, and the three bearings are distributed in a regular triangle shape; when the mounting mechanism is connected with the roller, three bearings act on the roller.
5. The method for manufacturing the roller of the lithium battery pole piece rolling mill as claimed in claim 1, further comprising a locking mechanism, wherein when the movable bracket is placed in the cryogenic box, the movable bracket is fixed with the cryogenic box by the locking mechanism.
6. The method for manufacturing the roller of the lithium battery pole piece rolling mill as claimed in claim 5, wherein the locking mechanism comprises a locking bolt and a locking nut, the movable support is provided with a light hole, a screw hole matched with the locking bolt is arranged at a corresponding position of the cryogenic box, one end of the locking bolt penetrates through the light hole to be in threaded fit with the screw hole, and the locking nut is arranged on the locking bolt to lock the locking bolt.
7. The method for manufacturing the roller of the lithium battery pole piece rolling mill as claimed in claim 5, wherein at least two groups of locking mechanisms are arranged on each side of each end of the movable support at intervals up and down and fixed with the cryogenic box.
8. The method for manufacturing the roller of the lithium battery pole piece rolling mill according to claim 1, wherein two ends of the cryogenic box are provided with horizontally moving sliding doors.
9. The method as claimed in claim 1, wherein the driving mechanism includes a motor, a speed reducer, a driving gear, a first driven gear, a second driven gear, a tensioning mechanism and a chain, the motor is connected to the driving gear through the speed reducer, the first driven gear is mounted on the shaft, the second driven gear is mounted on the roller, the chain connects the driving gear and the first driven gear, the second driven gear is engaged with the chain, the tensioning gear is engaged with the chain and connected to the tensioning mechanism, and the tensioning mechanism is used to adjust the position of the tensioning gear to tension the chain.
10. The method for manufacturing the roller of the lithium battery pole piece rolling mill according to claim 9, wherein the drawing mechanism comprises a tension meter and an electric cylinder.
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| CN104032117A (en) * | 2014-05-12 | 2014-09-10 | 宜兴市永昌轧辊有限公司 | Heat treatment method for ultra-high-hardness nonferrous-metal cold roll |
| CN109609852A (en) * | 2018-12-29 | 2019-04-12 | 江苏润孚机械轧辊制造有限公司 | A kind of preparation method of planisher, polishing machine working roll |
| CN211570734U (en) * | 2020-01-10 | 2020-09-25 | 太仓市五洲轧辊有限公司 | Liquid nitrogen cryogenic device for improving quenching depth of roller body |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5310312A (en) * | 1976-06-23 | 1978-01-30 | Hitachi Ltd | Treating apparatus at sub-zero |
| JPS53112215A (en) * | 1977-03-14 | 1978-09-30 | Hitachi Ltd | Circulating method for liquid nitrogen |
| CN2117379U (en) * | 1991-06-20 | 1992-09-30 | 核工业西南物理研究院 | Vacuum low temp. treating apparatus |
| CN104032117A (en) * | 2014-05-12 | 2014-09-10 | 宜兴市永昌轧辊有限公司 | Heat treatment method for ultra-high-hardness nonferrous-metal cold roll |
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