A lifting turning platform and turning method thereof

Abstract

The present invention discloses a lifting billet turning platform and a turning method thereof, which belong to the technical field of high-temperature steel billets or high-temperature rolled products conveying. The lifting billet turning platform of the present invention comprises a lifting frame, a scissor arm connected to the lifting frame in a sliding or rolling manner, a support seat fixed on the lifting frame, a four-link arm hinged on the support seat, a driving mechanism one that cooperates with the scissor arm to drive the lifting frame to lift and lower the billet, and a driving mechanism two that is hinged on the lifting frame and can drive the four-link arm to turn the billet over. The scissor arm drives the lifting frame to lift the billet. After lifting to the right position, the four-link arm turns the billet over again. The billet with different shapes and sizes of cross-section can be turned over on the roller surface, and other working conditions such as lifting slide rails can also be turned over. The problem in the prior art that the turning claw device hinders the billet from running on the roller surface during the return stroke and the square billet is easily damaged by the impact is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of conveying high-temperature steel billets or high-temperature rolled products, and more specifically, relates to a lifting billet turning platform and a turning method thereof. Background Art

[0002] Many steel mills use continuous pusher regenerative heating furnaces for both rectangular and square billets. To increase the upper and lower heating areas of the billets, rectangular billets are heated flat into the furnace. From a heat transfer perspective, flat billets are thinner than vertical billets, resulting in a smaller temperature difference between the surface and the center. However, due to the rolling process requirements for different specifications and types of steel products, most rectangular billets exiting the furnace require vertical rolling before entering the billet mill. This means that the hot rectangular billets must be flipped 90° on the conveyor rollers. In the metallurgical industry, flipping high-temperature billets is commonly accomplished using a flipping arm and a combination mechanism. A drive mechanism pushes the flipping arm and the connecting claws to achieve flipping. However, flipping billets with different cross-sectional shapes and sizes is difficult to achieve.

[0003] After searching, the patent document with patent application number 202020769680.4 discloses a steel turning and pushing claw device for a continuous casting machine. The driving mechanism, the rotating arm and the steel connecting claw are fixedly hinged on the lifting slide rail frame through a long axis, thereby pushing the steel connecting claw to rotate to complete the turning of the billet to the lifting slide rail above the roller. The steel connecting claw is a folding component, which effectively solves the problem of hindering the billet from running on the roller surface during the return process of the steel connecting claw, but it is not suitable for the roller surface turning of billets of various cross-sections.

[0004] The patent document with patent application number 201210125191.5 discloses a steel billet turning machine, in which the driving mechanism is connected to the rotating arm through a long axis to push the rotating arm, and the other end of the rotating arm is fixedly hinged with the pusher claw, so that the billet with different cross-section shapes and specifications can be turned over. It is suitable for turning the billet on the roller surface, but the long axis connection has high requirements for the installation space under the roller, and when the pusher claw turns over, the corners of the square billet are easily damaged under the impact. Summary of the Invention

[0005] 1. Problems to be solved

[0006] The present application aims to provide a lifting and turning platform for blanks and a turning method thereof, which are advantageous in at least one aspect over the prior art described in the background art.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] A lifting and turning platform comprises a lifting frame, a scissor arm connected to the lifting frame in a sliding or rolling manner, a support seat fixed on the lifting frame, a four-link arm hinged to the support seat, a driving mechanism one that cooperates with the scissor arm to drive the lifting frame to lift and lower the blank, and a driving mechanism two that is hinged on the lifting frame and can drive the four-link arm to turn the blank. The scissor arm drives the lifting frame to lift the blank. After lifting into place, the four-link arm turns the blank over. The roller surface of blanks with different shapes and specifications can be turned over, and other working conditions such as lifting slide rails can also be turned over.

[0010] Furthermore, the lifting frame includes a support platform and a lifting platform above the support platform. The scissor arm includes two scissor arm connecting rods hinged at the middle. Of the four distal ends of the two scissor arm connecting rods, the two upper distal ends and the two lower distal ends are respectively connected to the lifting platform and the support platform by sliding or rolling. The drive mechanism drives one or both of the lower distal ends to retract inward and outward within the support platform to raise and lower the lifting platform. The entire device has a compact layout, ingenious mechanical design, strong overall stability, low installation space requirements, minimal civil engineering construction during installation, and the number of lifting and turning platforms required can be determined based on the size of the blanks, thus providing wide applicability.

[0011] Furthermore, the four-link arm includes a bottom cross bar, a left vertical bar, an L-shaped upper bar and a right vertical bar, which are hinged in sequence through a hinge shaft 1, and the left vertical bar and the right vertical bar are in a parallel state; the hinged ends of the bottom cross bar and the left vertical bar are hinged to the support seat at the same time; the middle part of the bottom cross bar is hinged to the telescopic end of the driving mechanism 2, and the driving part of the driving mechanism 2 is hinged to the slot block fixed on the lifting platform through the hinge shaft 2.

[0012] Furthermore, the four distal ends of the two scissor arm connecting rods are fixedly connected with rollers, and the four rollers are respectively connected to the rolling grooves in the support platform and the lifting platform in pairs and rolling relative to each other.

[0013] Furthermore, the driving mechanism 1 and the driving mechanism 2 are oil cylinders, air cylinders or electro-hydraulic push rods, and the corresponding driving mechanism 1 is selected according to the texture and specifications of the blank.

[0014] Furthermore, the telescopic end of the driving mechanism 1 is fixedly connected to the roller on the support platform through a connecting rod, so as to avoid interference between the telescopic end of the driving mechanism 1 and the support platform when the telescopic end is extended or retracted.

[0015] Furthermore, the support seat is slidably connected to the lifting platform through a slide rail, which is suitable for flipping blanks with different cross-section shapes and sizes and different working conditions. By changing the position of the four-link arm hinge fulcrum, near-in-situ flipping, forward flipping or backward flipping can be achieved.

[0016] Furthermore, the bottom of the supporting platform is a base, and the driving mechanism 1 is fixed on the base; the driving mechanism 1 is set in reverse to reduce the installation space.

[0017] Furthermore, the driving mechanisms of the two lifting and turning platforms are arranged in pairs, and are arranged in opposite directions to each other; the rollers on the two adjacent support platforms of the two lifting and turning platforms are fixedly connected by a linkage rod, so as to achieve double or even multiple speed of turning the billets, thereby improving production efficiency.

[0018] A method for turning over a lifting blank turning platform, comprising the following steps:

[0019] Station 1: When the roller conveyor transports the blank to the top of the L-shaped upper rod, the telescopic end of the driving mechanism 1 extends and the scissor arm retracts inward, thereby driving the lifting platform to rise. The long side of the L-shaped upper rod lifts the blank off the roller conveyor to station 2.

[0020] Station 2: The telescopic end of the driving mechanism 2 retracts, driving the right vertical rod downward until the L-shaped upper rod rotates 90 degrees, and then drives the blank to flip to the short side of the L-shaped upper rod and then to station 3;

[0021] Station 3: The telescopic end of the driving mechanism 1 retracts, and the scissor arm opens outward, thereby driving the lifting platform to descend. The short side of the L-shaped upper rod lifts the blank and drops it flat on the roller conveyor.

[0022] Station 4: The telescopic end of the driving mechanism 1 continues to retract, thereby driving the lifting platform to continue to descend and return to its original position, waiting for the roller to transport another blank to the top of the L-shaped upper rod.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The lifting billet turning platform and its turning method of the present invention solve the problem in the prior art that the billet is hindered from running on the roller surface during the return stroke of the steel turning claw device, and the corners of the square billet are easily damaged under impact. The invention also has a compact layout, ingenious mechanism design, strong overall stability, low installation space requirements, small amount of civil construction during installation, and the number of lifting billet turning platforms required can be determined according to the size of the billet. The invention has a wide applicability; it can realize the roller surface turning of billets with different cross-section shapes and specifications, and can also realize turning in other working conditions such as lifting slide rails; and multiple billet turning platforms can be arranged in parallel according to the length of the billet;

[0026] (2) The lifting platform and the turning method thereof of the present invention are configured in such a way that the lifting height of the lifting platform is configured according to the turning requirements, the driving mechanism stroke, the scissor arm length, and the frame roller length can be configured accordingly, and the turning of the blanks under different working conditions can be satisfied;

[0027] (3) The lifting billet turning platform and its turning method of the present invention have a parallelogram-shaped four-link arm linkage mechanism that turns billets smoothly, effectively avoiding damage to billet corners caused by the impact of traditional claw turning;

[0028] (4) The lifting blank turning platform and the turning method thereof of the present invention can also realize near-in-situ turning, forward turning or backward turning by changing the position of the hinge fulcrum of the four-link arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the lifting blank turning platform of the present invention at the working position;

[0030] Figure 2 This is a structural schematic diagram of the lifting blank turning platform of the present invention at the second working position;

[0031] Figure 3 This is a schematic structural diagram of the lifting and turning platform of the present invention at the working position three times;

[0032] Figure 4 This is a schematic structural diagram of the lifting and turning platform of the present invention at four working positions;

[0033] Figure 5 This is a schematic diagram of the entire turning process of the lifting turning platform of the present invention;

[0034] Figure 6 A schematic diagram of the entire turning process of the blank by the lifting blank turning platform of the reversely arranged driving mechanism 1 of the present invention;

[0035] Figure 7 This is a schematic diagram of the status of two sets of linked lifting and turning platforms.

[0036] In the figure: 1. Lifting frame; 2. Scissor arm; 3. Four-link arm; 5. Support seat; 6. Driving mechanism 1; 7. Driving mechanism 2; 8. Connecting rod; 9. Linking rod; 10. Blank; 11. Support platform; 12. Lifting platform; 13. Base; 20. Roller; 21. Scissor arm connecting rod; 22. Roller; 31. Bottom cross bar; 32. Left vertical bar; 33. L-shaped upper bar; 34. Right vertical bar; 35. Articulated axis 1; 61. Telescopic end; 71. Articulated axis 2; 121. Slot block. DETAILED DESCRIPTION

[0037] The present invention is further described below with reference to specific embodiments and accompanying drawings.

[0038] Example 1

[0039] The lifting and turning platform of this embodiment is as follows Figure 1 As shown, it includes a lifting frame 1, a scissor arm 2 slidingly or rollingly connected to the lifting frame 1, a support base 5 fixed on the lifting frame 1, a four-link arm 3 hinged to the support base 5, a driving mechanism 6 that cooperates with the scissor arm 2 to drive the lifting frame 1 to rise and fall, and a driving mechanism 7 hinged on the lifting frame 1 and capable of driving the four-link arm 3 to turn the blank 10.

[0040] When the lifting and turning platform of this embodiment is used, the scissor arm 2 drives the lifting frame 1 to lift the blank 10. After lifting it into place, the articulated four-link arm 3 is used to turn the blank 10 over. The roller surface of the blank 10 with different shapes and specifications can be turned over, and other working conditions such as lifting slide rails can also be turned over.

[0041] Example 2:

[0042] The basic structure of the lifting and turning platform of this embodiment is the same as that of embodiment 1, except that: Figure 1 As shown, the lifting frame 1 includes a supporting platform 11 and a lifting platform 12 above the supporting platform 11, and the scissor arm 2 includes two scissor arm connecting rods 21 hinged in the middle, and among the four distal ends of the two scissor arm connecting rods 21, the two upper distal ends and the two lower distal ends are respectively connected to the lifting platform 12 and the supporting platform 11 by sliding or rolling; the driving mechanism 6 drives one or two lower distal ends to retract inward and outward in the supporting platform 11 to complete the raising and lowering of the lifting platform 12. The four-link arm 3 comprises a bottom crossbar 31, a left vertical bar 32, an L-shaped upper bar 33, and a right vertical bar 34, which are articulated in sequence via a hinge axis 1 35. The left and right vertical bars 32 and 34 are parallel to each other. The hinged ends of the bottom crossbar 31 and the left vertical bar 32 are simultaneously hinged to the support base 5. The middle portion of the bottom crossbar 31 is hinged to the telescopic end of the second drive mechanism 7. The drive unit of the second drive mechanism 7 is hinged to a slot block 121 fixed to the lifting platform 12 via a hinge axis 2 71. The four distal ends of the two scissor arm links 21 are fixedly connected to rollers 22. The four rollers 22 are respectively connected to rolling grooves in the support platform 11 and the lifting platform 12 for relative movement. The first drive mechanism 6 and the second drive mechanism 7 are hydraulic cylinders, pneumatic cylinders, or electro-hydraulic push rods. The appropriate first drive mechanism is selected based on the quality and specifications of the billet. Since high-temperature steel billets are generally heavy, hydraulic cylinders with greater thrust and stability are generally used. The telescopic end 61 of the oil cylinder is fixedly connected to the roller 22 on the support platform 11 through the connecting rod 8 to avoid interference between the telescopic end 61 of the oil cylinder and the support platform 11 when the oil cylinder is telescopic.

[0043] The turning method of the lifting and turning blank table of this embodiment is as follows: Figure 1 、 2 , 3, 4, 5, the steps are:

[0044] Station 1: When the roller conveyor 20 conveys the blank 10 to the top of the L-shaped upper rod 33, the telescopic end of the driving mechanism 1 6 extends and the scissor arm 2 contracts inward, thereby driving the lifting platform 12 to rise. The long side of the L-shaped upper rod 33 lifts the blank 10 off the roller conveyor 20 to station 2;

[0045] Station 2: The telescopic end of the driving mechanism 2 7 retracts, driving the right vertical rod 34 downward until the L-shaped upper rod 33 rotates 90 degrees, and then drives the blank 10 to flip to the short side of the L-shaped upper rod 33 and then to station 3;

[0046] Station 3: The telescopic end of the driving mechanism 1 6 retracts, and the scissor arm 2 opens outward, thereby driving the lifting platform 12 to descend. The short side of the L-shaped upper rod 33 lifts the blank 10 and drops it flat on the roller 20;

[0047] Station 4: The telescopic end of the driving mechanism 1 6 continues to retract, thereby driving the lifting platform 12 to continue to descend and return to its original position, waiting for the roller 20 to transport another blank 10 to the top of the L-shaped upper rod 33.

[0048] Example 3:

[0049] The basic structure of the lifting blank turning platform of this embodiment is the same as that of embodiment 2, except that the support seat 5 is connected to the lifting platform 12 by a sliding rail. For example, the sliding rail is laid on the lifting platform 12, and a sliding groove adapted to the sliding rail is provided at the bottom of the support seat 5. It is suitable for turning blanks with different cross-section shapes and sizes and different working conditions. By changing the position of the hinge fulcrum of the four-link arm 3, near-in-situ turning, forward turning or backward turning can be achieved. The bottom of the support platform 11 is a base 13, and the driving mechanism 6 is fixed to the base 13; as shown in FIG. Figure 6 As shown, the driving mechanism 1 6 can also be set in reverse to reduce the installation space.

[0050] The flipping method of the lifting billet turning platform in this embodiment takes the flipping of the roller surface of a 3500x240x145 rectangular billet as an example, and it is necessary to set up three lifting billet turning platforms at intervals along the conveying roller. The billet turning platform is in station one, and the long side of the L-shaped upper rod 33 of the parallelogram four-link arm 3 is lower than the roller surface of the roller 20; when the sensor detects that a billet is conveyed through the roller 20, the hydraulic system works under the control of the PLC, driving the rod cavity of the oil cylinder one to extend and the scissor arm 2 to retract inward, thereby driving the lifting platform 12 to rise upward, and the long side of the L-shaped upper rod 33 lifts the billet away from the roller 20 to station one; the oil cylinder two receives a signal, and the rod cavity retracts to drive the right side of the parallelogram four-link arm 3. The vertical rod 34 retracts inward, and the L-shaped upper rod 33 rotates 90 degrees to reach station three. The blank then flips to the short side of the L-shaped upper rod 33 and is above the roller surface of the roller table 20. When the driving cylinder receives a signal, the rod cavity retracts, and the scissor arm 2 opens outward, driving the lifting platform 12 to descend. The blank falls smoothly onto the roller surface. When the signal is received again, the lifting platform 12 continues to descend, reaching station four. The parallelogram four-link arm 3 is lower than the roller surface as a whole, without hindering the movement of the blank on the roller surface, and awaits the next incoming blank signal. The station signal can be detected by a proximity switch.

[0051] The lifting billet turning platform and its turning method of this embodiment can realize precise control of turning over, have low requirements for manufacturing and installation space, and can be used in situations where billets or finished products need to be turned over, such as billet turning over, steel section turning inspection, etc.; and can be used offline or online, and can be promoted and applied in continuous casting, steel rolling and similar functional requirements; and can also adopt full automatic control and manual control, which can be achieved by switching switches. In the full automatic control mode, as long as the power is turned on, the entire operation process does not require human operation, and all actions are controlled by detection and feedback signals of detection elements. When the detection element fails, it can be freely switched to manual control through the control switch to achieve seamless switching.

[0052] Example 4:

[0053] The basic structure of the lifting and turning platform of this embodiment is the same as that of embodiment 3, except that: Figure 7 As shown, the lifting and turning platforms are arranged in pairs, and the driving mechanisms 6 of the two lifting and turning platforms are arranged in opposite directions; the rollers 22 on the two adjacent supporting platforms 11 of the two lifting and turning platforms are fixedly connected by a synchronous linkage rod 9, realizing double or even multiple speed turning of the billets, thereby improving production efficiency.

[0054] The examples described in the present invention are merely descriptions of the preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should fall within the scope of protection of the present invention.

Claims

1. A lifting and turning platform, characterized in that: The invention comprises a lifting frame (1), a scissor arm (2) connected to the lifting frame (1) in a sliding or rolling manner, a support base (5) fixed on the lifting frame (1), a four-link arm (3) hinged to the support base (5), a driving mechanism (6) that cooperates with the scissor arm (2) to drive the lifting frame (1) to move up and down, and a driving mechanism (7) that is hinged to the lifting frame (1) and can drive the four-link arm (3) to turn the blank (10); The four-link arm (3) is a parallelogram mechanism, comprising a bottom crossbar (31), a left vertical bar (32), an L-shaped upper bar (33) and a right vertical bar (34) which are hinged in sequence through a hinge shaft (35), and the left vertical bar (32) and the right vertical bar (34) are in a parallel state; the hinged ends of the bottom crossbar (31) and the left vertical bar (32) are hinged to the support seat (5) at the same time; the middle part of the bottom crossbar (31) is hinged to the telescopic end of the second driving mechanism (7), and the driving part of the second driving mechanism (7) is hinged to the slot block (121) fixed on the lifting platform (12) through the second hinge shaft (71); The lifting frame (1) includes a supporting platform (11) and a lifting platform (12) above the supporting platform (11); the scissor arm (2) includes two scissor arm connecting rods (21) hinged at the middle; of the four distal ends of the two scissor arm connecting rods (21), two upper distal ends and two lower distal ends are respectively connected to the lifting platform (12) and the supporting platform (11) by sliding or rolling; the driving mechanism (6) drives one or two lower distal ends to retract inward and outward in the supporting platform (11) to complete the lifting and lowering of the lifting platform (12); The support seat (5) is slidably connected to the lifting platform (12) via a slide rail.

2. The lifting and turning platform according to claim 1, characterized in that: The four distal ends of the two scissor arm connecting rods (21) are fixedly connected to rollers (22), and the four rollers (22) are respectively connected to rolling grooves in the supporting platform (11) and the lifting platform (12) in pairs relative to each other.

3. The lifting and turning platform according to claim 2, characterized in that: The driving mechanism 1 (6) and the driving mechanism 2 (7) are oil cylinders, air cylinders or electro-hydraulic push rods.

4. The lifting and turning platform according to claim 2, characterized in that: The telescopic end (61) of the driving mechanism (6) is fixedly connected to the roller (22) on the supporting platform (11) through a connecting rod (8).

5. The lifting and turning platform according to claim 4, characterized in that: The bottom of the support platform (11) is a base (13), and the driving mechanism (6) is fixed on the base (13); the driving mechanism (6) is set in reverse.

6. The lifting and turning platform according to claim 4, characterized in that: The two lifting and turning platforms are arranged in pairs, and the driving mechanisms (6) of the two lifting and turning platforms are arranged in opposite directions; the rollers (22) on the two adjacent supporting platforms (11) of the two lifting and turning platforms are fixedly connected through a linkage rod (9).

7. A method for turning over a lifting billet turning platform according to claim 6, characterized in that: The steps are: Station 1: When the roller conveyor (20) conveys the blank (10) to the top of the L-shaped upper rod (33), the telescopic end of the driving mechanism (6) extends, and the scissor arm (2) contracts inward, thereby driving the lifting platform (12) to rise, and the long side of the L-shaped upper rod (33) lifts the blank (10) off the roller conveyor (20) to station 2; Station 2: The telescopic end of the driving mechanism 2 (7) is retracted, driving the right vertical rod (34) downward until the L-shaped upper rod (33) rotates 90 degrees, and then driving the blank (10) to flip to the short side of the L-shaped upper rod (33) and then to station 3; Station 3: The telescopic end of the driving mechanism 1 (6) retracts, and the scissor arm (2) opens outward, thereby driving the lifting platform (12) to descend, and the short side of the L-shaped upper rod (33) lifts the blank (10) and drops it flat on the roller (20); Station 4: The telescopic end of the driving mechanism 1 (6) continues to retract, thereby driving the lifting platform (12) to continue to descend and return to its original position, waiting for the roller (20) to transport another blank (10) to the top of the L-shaped upper rod (33).

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