CN111672902A - Multifunctional test rolling mill capable of rolling special-shaped raw materials - Google Patents
Multifunctional test rolling mill capable of rolling special-shaped raw materials Download PDFInfo
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- CN111672902A CN111672902A CN202010565225.7A CN202010565225A CN111672902A CN 111672902 A CN111672902 A CN 111672902A CN 202010565225 A CN202010565225 A CN 202010565225A CN 111672902 A CN111672902 A CN 111672902A
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- 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
- B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/10—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 structural sections, i.e. work of special cross-section, e.g. angle steel in a single two-high or universal rolling mill stand
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- 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
- B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
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- 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
- B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/0805—Flat bars, i.e. having a substantially rectangular cross-section
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- 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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
- B21B39/04—Lifting or lowering work for conveying purposes, e.g. tilting tables arranged immediately in front of or behind the pass
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention provides a multifunctional test rolling mill capable of rolling special-shaped raw materials, which comprises a rack, a roll system, a screwdown gear, a roller way and a blank straightening device, wherein the roll system forms a plurality of different hole patterns, the special-shaped blank is subjected to flat rolling and vertical rolling by combining different rolling processes, the roll gap is quickly adjusted and slightly adjusted by the screwdown gear, the rolling speed of the roll is increased, and rolled pieces can conveniently enter different hole patterns during rolling by the blank straightening device.
Description
Technical Field
The invention belongs to the technical field of reversible hot rolling test rolling mills, and particularly relates to a multifunctional test rolling mill capable of rolling special-shaped raw materials.
Background
In the metallurgical industry, the development of new steel products generally needs to go through the processes of theoretical research, numerical simulation, pilot test, batch trial production and the like, and the pilot base of advanced steel enterprises at home and abroad is provided with smelting, rolling and heat treatment test equipment.
Most of the domestic pilot test rolling mills have single functional design and limited test varieties and specifications, and are mostly considered to be limited to strip rolling. For tests of round steel, square steel, flat steel and other varieties, special rolling equipment is required to be configured, and pilot test equipment is high in investment and cost.
In addition, for saving cost and being convenient for demoulding, pilot smelting experimental products are mostly die casting shell ingots of 25-200 kg, and the plate is rolled and rolled into a line shape, so that the rolling line shape is not easy to control, and special-shaped steel ingots such as the shell ingots are easy to slip when being bitten into by a rolling mill, so that the difficulty of biting steel by the rolling mill can be caused. At present, before a hot rolling test procedure, a special-shaped blank sample such as a shell ingot and the like is generally forged, and the hot rolling test can be carried out after the special-shaped blank sample is forged into a regular plate, so that the forging procedure is increased, the real reliability of the hot rolling test is influenced, and the cost resource is increased.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a multifunctional test rolling mill capable of rolling special-shaped raw materials, which solves the problem that rolling tests can be carried out only after forging special-shaped blanks such as shell ingots and the like, and can realize a multi-variety test production mode of 'plate and special-shaped material' with high efficiency and low cost.
The technical scheme adopted by the invention for solving the technical problems is as follows: a multifunctional test rolling mill capable of rolling special-shaped raw materials is characterized by comprising a rack, a roll system, a screw-down device, a roller way and a blank straightening device, wherein the rack is formed by symmetrically arranging a left rolling mill housing and a right rolling mill housing; the roller system comprises an upper roller, a lower roller and a bearing seat, wherein two ends of the upper roller and two ends of the lower roller are respectively connected with the left rolling mill housing and the right rolling mill housing through the bearing seat; the screw-down device comprises an electric screw-down mechanism, a hydraulic screw-down mechanism and an upper roller balancing mechanism, the electric screw-down mechanism comprises a motor, a speed reducer and a screw-down screw, the motor and the speed reducer are arranged on the top plates of the left and right rolling mill housings, the output shaft of the motor passes through the top plates to be connected with the screw-down screws, the hydraulic pressing mechanism comprises a pressing hydraulic cylinder and a connector, the top end of the pressing hydraulic cylinder is connected with the pressing screw, the bottom end of the pressing hydraulic cylinder is fixed on the connector, the connector is arranged at the top of the bearing seat, the upper roller balancing mechanism comprises a supporting plate, a balancing hydraulic cylinder and a balancing rod, two ends of the supporting plate are respectively arranged on the top plates of the left rolling mill housing and the right rolling mill housing, the balance hydraulic cylinder penetrates through the central through hole of the support plate and is suspended on the support plate, the piston rod end of the balance hydraulic cylinder is hinged with the balance rod through a pin shaft, and two ends of the balance rod are respectively inserted into lug pin grooves of the connectors; the roller ways comprise a front roller way and a rear roller way which are respectively arranged at the front side and the rear side of the frame; the blank straightening device comprises a guide plate and a correcting mechanism, wherein the guide plate is respectively arranged at an inlet and an outlet of the lower roller, and the correcting mechanism is arranged on two sides of a front roller way and a rear roller way of the machine.
According to the scheme, the correcting mechanism comprises a left push plate, a right push plate, a push plate hydraulic cylinder and a push plate slide way, the push plate slide way is arranged in the gap of the roller way, the left push plate and the right push plate are symmetrically arranged on the push plate slide way and correspond to the left side and the right side of the roller way, the push plate hydraulic cylinder is connected with the left push plate and the right push plate, and the left push plate and the right push plate are pushed to move.
According to the scheme, the roll surfaces of the upper roll and the lower roll are sequentially provided with a circular groove, a square groove, a rectangular groove and a flat rolling surface, two ends of the upper roll and the lower roll are respectively provided with a conical roll journal, and the roll journals are configured with the bearing seats.
According to the scheme, the front roller way and the rear roller way are both composed of a plurality of round rollers driven by motors.
According to the scheme, the device further comprises a feeding trolley, wherein the feeding trolley consists of a bottom plate, a left side plate and a right side plate, and the bottom plate bears the blanks.
The invention has the beneficial effects that: the multifunctional test rolling mill capable of rolling the special-shaped raw materials is provided, different hole patterns are formed on the same roller, a test production mode of multiple types of plates and special-shaped materials is realized on the same pair of rollers, and the multifunctional test rolling mill can be used for rolling and producing multiple types of products such as plates, round steel, square steel, flat steel and the like; by utilizing different hole patterns and combining different rolling processes, the special-shaped blanks such as the cannonball ingot and the like can be subjected to flat rolling and vertical rolling under the same roller system, the plate shape can be effectively controlled, and the problem that the rolling test can be carried out only after the special-shaped blanks such as the cannonball ingot and the like are forged is solved; the feeding trolley is used for conveying rolled blanks on the roller way, and the guide plate is used for conveying rolled pieces between two rotating rollers with specific shapes, so that the problems that the blanks with special shapes or small specifications are easy to fall and deviate from the gap of the roller way in front of the machine, the rollers are difficult to bite steel and the like are solved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural view of upper and lower rolls according to an embodiment of the present invention.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
As shown in figures 1-2, a multifunctional test rolling mill capable of rolling special-shaped raw materials comprises a frame 1, a roll system, a screw-down device, a roller way and a blank straightening device, wherein the frame is formed by symmetrically arranging a left rolling mill housing and a right rolling mill housing and is mainly used for installing the roll system and the screw-down device; the roller system comprises an upper roller 2, a lower roller 3 and a bearing seat 4, wherein two ends of the upper roller and the lower roller are respectively provided with a conical roller journal 5, the roller journals are matched with the bearing seats, and the bearing seats are connected with a left rolling mill housing and a right rolling mill housing. The round groove 6, the square groove 7, the rectangular groove 8 and the flat rolling surface 9 are sequentially arranged on the roll surfaces of the upper roll and the lower roll, and the round groove, the square groove, the rectangular groove and the flat rolling surface on the roll surface of the upper roll are respectively coupled with the round groove, the square groove, the rectangular groove and the flat rolling surface on the roll surface of the lower roll so as to roll the billet raw material. When the circular groove of the upper roller is coupled with the circular groove of the lower roller, round steel can be rolled; when the square groove of the upper roller is coupled with the square groove of the lower roller, square steel can be rolled; when the rectangular groove of the upper roller is coupled with the rectangular groove of the lower roller, flat steel can be rolled; when the flat rolling surface of the upper roller is coupled with the flat rolling surface of the lower roller, the plate can be rolled.
The screw-down device comprises an electric screw-down mechanism, a hydraulic screw-down mechanism and an upper roller balance mechanism, the electric screw-down mechanism comprises a motor 10, a speed reducer 11 and a screw-down screw 12, the motor and the speed reducer are arranged on the top plates of the left and right rolling mill housing, the output shaft of the motor passes through the top plates and is connected with the screw-down screw, the hydraulic screw-down mechanism comprises a hydraulic screw-down cylinder 13 and a connector 14, the top end of the hydraulic screw-down cylinder is connected with the screw-down screw, the bottom end of the; the electric pressing mechanism is high in pressing speed, large in roll gap adjustment amount and capable of achieving quick pressing, the hydraulic pressing mechanism transmits pressing force to the bearing seat through the connector, response is quick, precision is high, and micro high-precision adjustment of the roll gap position can be achieved.
The upper roller balancing mechanism comprises a supporting plate 15, a balancing hydraulic cylinder 16 and a balancing rod 17, wherein two ends of the supporting plate are respectively arranged on the top plates of the housing of the left rolling mill and the right rolling mill, the balancing hydraulic cylinder passes through a central through hole of the supporting plate and is suspended on the supporting plate, a piston rod end of the balancing hydraulic cylinder is hinged with the balancing rod through a pin shaft, and two ends of the balancing rod are respectively inserted into lug pin grooves of the connectors; when a piston rod of the balance hydraulic cylinder retracts upwards, two ends of the balance rod act on the connecting head upwards to support and balance the two upper roller bearing seats connected with the connecting head; when a piston rod of the balance hydraulic cylinder extends downwards, the two upper roll bearing blocks move downwards under the action of self weight. The electric pressing device, the hydraulic pressing device and the upper roller balancing device are matched with each other, so that the pressing and lifting movement speeds of the roller are further increased, the rapid reversible rolling can be realized, and the finish rolling temperature is guaranteed.
The roller way comprises a front roller way and a rear roller way which are respectively arranged at the front side and the rear side of the frame and are composed of a plurality of round rollers 18 driven by a motor. The feeding trolley 19 carries the blank 20 to move on the roller way, and the feeding trolley consists of a bottom plate, a left side plate and a right side plate. The feeding trolley is arranged at one end of a roller way of the front machine, and the special-shaped or small-sized rolling blanks to be conveyed are arranged on a bottom plate of the feeding trolley in a certain posture. When the round roller driven by the motor on the roller way rotates forwards, the feeding trolley moves towards the roller direction, and the special-shaped rolling blank loaded on the feeding trolley enters the inlet of the rolling mill along the running direction of the roller way in a certain posture; when the front end of the feeding trolley is contacted with the front guide plate of the machine, the feeding trolley stays at the front guide plate of the machine, and the special-shaped rolled blank is continuously and forwardly bitten into the roll pass under the inertia effect; when the rolled piece is bitten, the roller way is reversed, and the feeding trolley can return to the initial position along the roller way.
The blank straightening device comprises a guide plate 21 and a straightening mechanism, wherein the guide plate is respectively arranged at an inlet and an outlet of a lower roller, a guide groove of the guide plate is matched with a round hole pattern, a square hole pattern, a rectangular hole pattern and a flat rolling surface on the roller surface of an upper roller and a lower roller, and an incoming blank is guided into a correct hole pattern and is accurately lifted to a required correct height. The straightening mechanism is arranged on two sides of the front roller way and the rear roller way of the machine and comprises a left push plate 22, a right push plate 23, a push plate hydraulic cylinder 24 and a push plate slide way 25, the push plate slide way is arranged in the gap of the roller way, the left push plate and the right push plate are symmetrically arranged on the push plate slide way and correspond to the left side and the right side of the roller way, the push plate hydraulic cylinder is connected with the left push plate and the right push plate, the left push plate and the right push plate are pushed to move.
Example one
The technological process of the cannonball ingot flat plate rolling experiment is as follows:
the feeding trolley is initially positioned at the end of a roller way of the front machine, the shell ingot is cylindrical, the diameter of the upper circular surface of the shell ingot is 180mm, the diameter of the lower cylindrical surface of the shell ingot is 200mm, the height of the shell ingot is 250mm, and the shell ingot is heated to a certain temperature and then placed on the feeding trolley in a certain posture.
First-pass flat rolling: and starting the upper roller and the lower roller of the rolling mill to rotate in the positive direction, and adjusting the roll gap between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller to 130 mm. The front roller way of the machine is controlled to rotate towards the rear direction of the machine, the feeding trolley on the roller way can synchronously move towards the direction of the rack, when the front end of the feeding trolley is in contact with the front guide guard plate of the machine, the feeding trolley can stay at the front guide guard plate of the machine, the shell ingot is continuously and forwards bitten between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller under the inertia effect, and a rolled piece enters the rear roller way of the machine after passing through the rollers. Meanwhile, the roller way is controlled to rotate backwards in the reverse direction, and the feeding trolley on the roller way is moved away after returning to the initial position, so that the first-pass rolling with the roll gap of 130mm is completed.
And (3) second pass flat rolling: and controlling the upper roller and the lower roller of the rolling mill to rotate reversely, and adjusting the roll gap between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller to be 100 mm. The left and right push plates behind the machine are controlled to move left and right along the push plate slideway by the push plate hydraulic cylinder respectively, so that the blank is pushed to be matched with the flat rolling surface. And controlling the roller way to rotate towards the front direction of the machine, biting the blank between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller under the action of the guide plate, and enabling the blank to enter the front roller way of the machine after passing through the rollers to finish the second pass rolling with the roller gap of 100 mm.
And (3) carrying out third-time flat rolling: and controlling the upper roller and the lower roller of the rolling mill to rotate in the positive direction, and adjusting the roll gap between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller to 80 mm. The left and right push plates are controlled by the push plate hydraulic cylinder to move left and right along the push plate slideway respectively, so that the blank is pushed to be matched with the flat rolling surface. And controlling the roller way to rotate towards the rear direction of the machine, biting the blank between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller under the action of the guide plate, and enabling the blank to enter the rear roller way of the machine after passing through the rollers to finish the third rolling of the roller gap of 80 mm.
And (3) carrying out flat rolling for the fourth pass: and controlling the upper roller and the lower roller of the rolling mill to rotate reversely, and adjusting the roll gap between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller to be 68 mm. The left and right push plates behind the machine are controlled to move left and right along the push plate slideway by the push plate hydraulic cylinder respectively, so that the blank is pushed to be matched with the flat rolling surface. And controlling the roller way to rotate towards the front direction of the machine, biting the blank between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller under the action of the guide plate, and enabling the rolled piece to enter the front roller way of the machine after passing through the rollers to finish the fourth pass rolling with the roller gap of 68 mm.
And (5) rolling immediately for the fifth pass: the upper roller and the lower roller of the rolling mill are controlled to rotate in the positive direction, and the rectangular hole type roll gap formed by the rectangular groove of the upper roller and the rectangular groove of the lower roller is adjusted to be 180 mm. The left and right push plates are controlled by the push plate hydraulic cylinder to move left and right along the push plate slideway, so that the blank is pushed to be matched with the rectangular hole pattern. And controlling the roller way to rotate towards the rear direction of the machine, biting the blank into the rectangular hole pattern formed by the rectangular groove of the upper roller and the rectangular groove of the lower roller under the action of the guide plate, and allowing the rolled piece to pass through the rollers and fall onto the roller way behind the machine to finish the fifth pass of rolling with the roller gap of 180 mm.
Carrying out sixth pass flat rolling: and controlling the upper roller and the lower roller of the rolling mill to rotate reversely, and adjusting the roll gap between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller to be 68 mm. The left and right push plates behind the machine are controlled to move left and right along the push plate slideway by the push plate hydraulic cylinder respectively, so that the blank is pushed to be matched with the flat rolling surface. And controlling the roller way to rotate towards the front direction of the machine, biting the blank between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller under the action of the guide plate, and enabling the blank to enter the front roller way of the machine after passing through the rollers to finish the sixth pass of rolling with the roller gap of 70 mm.
And (3) carrying out vertical rolling on the seventh pass: the positive rotation of the upper roller and the lower roller of the rolling mill is controlled, and the rectangular hole type roll gap formed by the rectangular groove of the upper roller and the rectangular groove of the lower roller is adjusted to be 160 mm. The left and right push plates are controlled by the push plate hydraulic cylinder to move left and right along the push plate slideway, so that the blank is pushed to be matched with the rectangular hole pattern. And controlling the roller way to rotate towards the rear direction of the rolling mill, biting the blank into the rectangular hole pattern formed by the rectangular groove of the upper roller and the rectangular groove of the lower roller under the action of the guide plate, and enabling the rolled piece to enter the roller way behind the rolling mill after passing through the rollers to finish the seventh rolling pass with the roller gap of 160 mm.
And (3) carrying out flat rolling for the eighth pass: and controlling the upper roller and the lower roller of the rolling mill to rotate reversely, and adjusting the roll gap between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller to be 68 mm. The left and right push plates behind the machine are controlled to move left and right along the push plate slideway by the push plate hydraulic cylinder respectively, so that the blank is pushed to be matched with the flat rolling surface. And controlling the roller way to rotate towards the front direction of the machine, biting the blank between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller under the action of the guide plate, and enabling the blank to enter the front roller way of the machine after passing through the rollers to finish the eighth pass rolling with the roller gap of 68 mm.
And ninth pass flat rolling: and controlling the upper roller and the lower roller of the rolling mill to rotate in the positive direction, and adjusting the roll gap between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller to be 50 mm. The left and right push plates are controlled by the push plate hydraulic cylinder to move left and right along the push plate slideway respectively, so that the blank is pushed to be matched with the flat rolling surface. And controlling the roller way to rotate towards the rear direction of the machine, biting the blank between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller under the action of the guide plate, and enabling the blank to enter the rear roller way of the machine after passing through the rollers to finish the ninth pass of rolling with a roller gap of 50 mm.
And rolling each pass according to flat rolling, gradually reducing the roll gap value between the flat rolling surface of the upper roll and the flat rolling surface of the lower roll, and adjusting to the required test thickness.
Example two
The technological process of the cannonball square rolling experiment is as follows:
the initial position and the control of the technological parameters from the first pass to the eighth pass are the same as the technological process of the plate rolling experiment.
And (4) carrying out vertical rolling on the ninth pass: the positive rotation of the upper roller and the lower roller of the rolling mill is controlled, and the rectangular hole type roll gap formed by the rectangular groove of the upper roller and the rectangular groove of the lower roller is adjusted to 130 mm. The left and right push plates are controlled by the push plate hydraulic cylinder to move left and right along the push plate slideway, so that the blank is pushed to be matched with the rectangular hole pattern. And controlling the roller way to rotate towards the rear direction of the machine, biting the blank into a rectangular hole pattern formed by the rectangular grooves of the upper roller and the rectangular grooves of the lower roller under the action of the guide plate, and enabling the blank to enter the rear roller way of the machine after passing through the rollers to finish the ninth pass of rolling with a roller gap of 140 mm.
And (3) carrying out tenth pass flat rolling: and controlling the upper roller and the lower roller of the rolling mill to rotate reversely, and adjusting the roll gap between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller to be 68 mm. The left and right push plates behind the machine are controlled to move left and right along the push plate slideway by the push plate hydraulic cylinder respectively, so that the blank is pushed to be matched with the flat rolling surface. And controlling the roller way to rotate towards the front direction of the machine, biting the blank between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller under the action of the guide plate, and enabling the blank to enter the front roller way of the machine after passing through the rollers to finish the tenth rolling with the roller gap of 68 mm.
And (3) performing vertical rolling on an eleventh pass: the upper roller and the lower roller of the rolling mill are controlled to rotate in the positive direction, and the rectangular hole type roll gap formed by the rectangular groove of the upper roller and the rectangular groove of the lower roller is adjusted to be 100 mm. The left and right push plates are controlled by the push plate hydraulic cylinder to move left and right along the push plate slideway, so that the blank is pushed to be matched with the rectangular hole pattern. The roller way is controlled to rotate towards the rear direction of the rolling mill, the blank is bitten between the rectangular hole patterns formed by the rectangular grooves of the upper roller and the rectangular grooves of the lower roller under the action of the guide plates, the blank enters the roller way at the rear of the rolling mill after passing through the rollers, and the eleventh-pass rolling with the roller gap of 100mm is completed.
The twelfth process is the same as the tenth process.
And (3) carrying out vertical rolling on the thirteenth pass: the positive rotation of the upper roller and the lower roller of the rolling mill is controlled, and the rectangular hole type roll gap formed by the rectangular groove of the upper roller and the rectangular groove of the lower roller is adjusted to be 70 mm. The left and right push plates are controlled by the push plate hydraulic cylinder to move left and right along the push plate slideway, so that the blank is pushed to be matched with the rectangular hole pattern. And controlling the roller way to rotate towards the rear direction of the machine, biting the blank into a rectangular hole pattern formed by the rectangular groove of the upper roller and the rectangular groove of the lower roller under the action of the guide plate, and enabling the blank to enter the roller way behind the machine after passing through the rollers to finish the thirteenth pass of rolling with the roller gap of 70 mm.
And (5) carrying out flat rolling on a fourteenth pass: the upper and lower rollers of the rolling mill are controlled to rotate reversely, and the roll gap between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller is adjusted to be 50 mm. The left and right push plates behind the machine are controlled to move left and right along the push plate slideway by the push plate hydraulic cylinder respectively, so that the blank is pushed to be matched with the flat rolling surface. And controlling the roller way to rotate towards the front direction of the machine, biting the blank between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller under the action of the guide plate, and enabling the blank to enter the front roller way of the machine after passing through the rollers to finish the fourteenth rolling with the roller gap of 50 mm.
And (3) carrying out vertical rolling on a fifteenth pass: and controlling the upper roller and the lower roller of the rolling mill to rotate in the positive direction, and adjusting the roll gap of a square hole pattern formed by the square groove of the upper roller and the square groove of the lower roller to be 50 mm. The left and right push plates in front of the machine are controlled to move left and right along the push plate slideway by the push plate hydraulic cylinder respectively, so that the blank 2 is turned over and pushed to be matched with the square hole pattern. And controlling the roller way to rotate towards the rear direction of the machine, biting the blank into a square hole pattern formed by the rectangular groove of the upper roller and the rectangular groove of the lower roller under the action of the guide plate, and enabling the blank to enter the rear roller way of the machine after passing through the rollers to finish the fifteenth rolling with the roller gap of 500 mm.
Sixteenth pass flat rolling: the upper roller and the lower roller of the rolling mill are controlled to rotate reversely, and the square hole type roll gap formed by the square groove of the upper roller and the square groove of the lower roller is adjusted to be 50 mm. And a push plate hydraulic cylinder is used for controlling the left and right push plates behind to move left and right along the push plate slide way respectively, so that the blank is turned and pushed to be matched with the square hole. And controlling the roller way to rotate towards the front direction of the machine, biting the blank between the flat rolling surface of the upper roller and the flat rolling surface of the lower roller under the action of the guide plate, and allowing the blank to fall on the roller way in front of the machine after passing through the rollers to finish the sixteenth pass of rolling with a roller gap of 50 mm. The rolled finished product is 50mm square steel.
Claims (5)
1. A multifunctional test rolling mill capable of rolling special-shaped raw materials is characterized by comprising a rack, a roll system, a screw-down device, a roller way and a blank straightening device, wherein the rack is formed by symmetrically arranging a left rolling mill housing and a right rolling mill housing; the roller system comprises an upper roller, a lower roller and a bearing seat, wherein two ends of the upper roller and two ends of the lower roller are respectively connected with the left rolling mill housing and the right rolling mill housing through the bearing seat; the screw-down device comprises an electric screw-down mechanism, a hydraulic screw-down mechanism and an upper roller balancing mechanism, the electric screw-down mechanism comprises a motor, a speed reducer and a screw-down screw, the motor and the speed reducer are arranged on the top plates of the left and right rolling mill housings, the output shaft of the motor passes through the top plates to be connected with the screw-down screws, the hydraulic pressing mechanism comprises a pressing hydraulic cylinder and a connector, the top end of the pressing hydraulic cylinder is connected with the pressing screw, the bottom end of the pressing hydraulic cylinder is fixed on the connector, the connector is arranged at the top of the bearing seat, the upper roller balancing mechanism comprises a supporting plate, a balancing hydraulic cylinder and a balancing rod, two ends of the supporting plate are respectively arranged on the top plates of the left rolling mill housing and the right rolling mill housing, the balance hydraulic cylinder penetrates through the central through hole of the support plate and is suspended on the support plate, the piston rod end of the balance hydraulic cylinder is hinged with the balance rod through a pin shaft, and two ends of the balance rod are respectively inserted into lug pin grooves of the connectors; the roller ways comprise a front roller way and a rear roller way which are respectively arranged at the front side and the rear side of the frame; the blank straightening device comprises a guide plate and a correcting mechanism, wherein the guide plate is respectively arranged at an inlet and an outlet of the lower roller, and the correcting mechanism is arranged on two sides of a front roller way and a rear roller way of the machine.
2. The multifunctional test rolling mill capable of rolling special-shaped raw materials according to claim 1, wherein the correcting mechanism comprises a left push plate, a right push plate, a push plate hydraulic cylinder and a push plate slide way, the push plate slide way is arranged in the gap of the roller way, the left push plate and the right push plate are symmetrically arranged on the push plate slide way and are arranged corresponding to the left side and the right side of the roller way, and the push plate hydraulic cylinder is connected with the left push plate and the right push plate to push the left push plate and the right push plate to move left and right.
3. The multifunctional test rolling mill capable of rolling special-shaped raw materials according to claim 2, wherein the roll surfaces of the upper and lower rolls are sequentially provided with a circular groove, a square groove, a rectangular groove and a flat rolling surface, two ends of the upper and lower rolls are respectively provided with a tapered roll journal, and the roll journals are configured with the bearing seats.
4. The multifunctional test rolling mill capable of rolling the special-shaped raw materials according to claim 1 or 3, wherein the front roll table and the rear roll table are both composed of a plurality of round rolls driven by motors.
5. The multifunctional test rolling mill capable of rolling special-shaped raw materials as claimed in claim 4, further comprising a feeding trolley, wherein the feeding trolley is composed of a bottom plate, a left side plate and a right side plate, and the bottom plate bears the blank.
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| CN115582430A (en) * | 2022-10-09 | 2023-01-10 | 福建三钢闽光股份有限公司 | Safe and efficient roll gap adjusting method for cantilever rolling mill |
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| CN111672902B (en) | 2022-07-08 |
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