Positioning device and control system for profile steel with different fixed sizes

Abstract

The invention discloses a positioning device and a control system for profile steel with different fixed sizes, the positioning device is arranged corresponding to a sawing machine on a hot rolling production line, and the positioning device comprises a rack, and a walking mechanism, a locking mechanism and a swing arm mechanism which are arranged on the rack, the swing arm mechanism is provided with a movable baffle mechanism used for positioning profile steel on a production line. Due to the design of the movable baffle, an original blocking function is added into a blocking function under pressurization, and positioning saw cutting of the long fixed-length profile steel is achieved; a counting wheel and an encoder are designed at the top of the lifting baffle, and the counting wheel is in reliable contact with the profile steel at a counting position, so that baffle positioning and encoding counting are on the same reference point, accurate sizing is ensured, and efficient production is realized; in cooperation with application of a fixed-length sawing control program, different fixed-length measurement modes are automatically selected according to different fixed lengths, accurate sawing is achieved, and the production rhythm is efficient and rapid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot-rolled steel, in particular to a positioning device and control system for different fixed-length steel. BACKGROUND

[0002] Steel, especially H-shaped steel, is an important steel structural member for industry, construction, bridges, oil drilling platforms, etc. Due to different use places, the finished product fixed-length of H-shaped steel varies greatly. The fixed-length of H-shaped steel is usually realized by fixed-length machine, sawing machine and other hot-rolled equipment. The length of one fixed-length is usually 24 meters, and the length of two fixed-length is usually 6-12 meters. With the increasing market pressure, increasing the length of one fixed-length can effectively improve the production efficiency and reduce the loss of steel sawing. At the same time, the length of finished product sometimes requires super-long fixed-length. However, the fixed-length machine does not have the function of super-long fixed-length due to design limitations, which cannot meet the current production needs.

[0003] The process of hot-rolled H-shaped steel product is: continuous casting billet-heating-primary rolling-sawing head and tail-universal rough rolling-fine rolling machine-precise rolling-one fixed-length sawing-cooling bed cooling-roller correction-finished product fixed-length sawing-inspection printing stacking-bundling-product. The length of one fixed-length is usually 24 meters, which is used as 12-meter fixed-length sawing. The cooling length of subsequent cooling bed equipment is usually 2 times the length of one fixed-length. In order to improve the production rhythm and reduce the number of sawing, the length of one fixed-length is increased to 48 meters, 72 meters, or even longer. At the same time, in order to better serve the market individual needs, the quantity of non-standard long fixed-length or super-long fixed-length finished product is increasing year by year. The positioning of two fixed-length machines and the cutting process of sawing machine both have the defect of no super-long fixed-length function. Therefore, it is difficult to realize super-long fixed-length for hot-rolled efficient production.

[0004] Usually, laser ranging and other technical means are used to measure the super-long size of H-shaped steel. However, due to the lack of mechanical positioning device, there is a large deviation in laser ranging and roller positioning. At the same time, there is no mechanical locking during sawing, which may cause the type steel to shake and the saw blade to break, resulting in production interruption and great safety risk. For example, the patent CN208289114U discloses a kind of aluminum profile fixed-length device, which can realize the horizontal transverse displacement of the driving sliding seat on the H-shaped steel beam along the length direction, thereby realizing the automatic adjustment of the fixed-length position. However, it cannot realize the positioning and sawing of long fixed-length steel. For example, the patent CN105458451A discloses a kind of H-shaped steel fixed-length size and angle cutting system and cutting method, which solves the processing problem of multi-angle and fixed-length of steel. However, the positioning of long fixed-length steel still cannot be realized. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a positioning device and control system for different fixed-length steel, which can realize the positioning of super-design long fixed-length, and the production rhythm is efficient and fast.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is:

[0007] A positioning device for different sized steel, the positioning device is arranged corresponding to a sawing machine on a hot rolling production line, the positioning device comprises a rack and a walking mechanism, a locking mechanism and a swing arm mechanism arranged on the rack, the swing arm mechanism is provided with a movable baffle mechanism for positioning the steel on the production line.

[0008] The walking mechanism comprises wheels, guide wheels, a motor and a walking pinion; a track rack mechanism is arranged on the production line, the track rack mechanism comprises an upper track, a rack and a side track; the wheels are in contact with the upper track, the guide wheels are in contact with the side track, and the walking pinion is engaged with the rack.

[0009] The locking mechanism comprises a clamping jaw and a clamping cylinder for driving the clamping jaw to work, and the track rack mechanism further comprises a clamping rail, the clamping jaw is arranged corresponding to the clamping rail.

[0010] The rack is arranged on the side of the production line, the motor is fixed on the rack and arranged downward, the walking pinion is connected with the rotating shaft of the motor and engaged with the outer side of the rack.

[0011] The swing arm mechanism comprises a lifting cylinder and a swing arm; one end of the lifting cylinder is connected with a cylinder base arranged on the rack, the other end of the lifting cylinder is connected with the swing arm; one end of the swing arm is connected with a swing arm base arranged on the rack, and the movable baffle mechanism is arranged on the other end of the swing arm.

[0012] The movable baffle mechanism comprises a baffle base, a guide cylinder and a movable baffle; the upper part of the baffle base is connected with the other end of the swing arm; the middle and lower parts of the baffle base are hollow, and the two sides are processed with sliding grooves; the movable baffle is movably arranged in the hollow area, the movable baffle is provided with guide blocks matched with the sliding grooves at the edge, and the movable baffle is connected with the piston rod of the guide cylinder.

[0013] The front and rear parts of the sliding groove are designed asymmetrically, the thickness of the rear part is greater than that of the front part, and the bottom of the movable baffle is provided with a pressing block for increasing the contact area with the steel.

[0014] A counting baffle is arranged corresponding to the sawing machine; the counting baffle comprises a lifting baffle, a base and an electric screw; a type groove is arranged at the top of the counting baffle, a movable guide frame is arranged in the type groove, a counting wheel and a counting encoder are arranged on the guide frame in association; a sliding groove is arranged on the base, a sliding block matched with the sliding groove is arranged on the side surface of the lifting baffle, and the electric screw is arranged on the sliding seat and connected with the lifting baffle.

[0015] The base is provided with a speed reducer for driving an electric screw rod, and a stroke encoder corresponding to the speed reducer is provided to accurately control the up-down moving height of the lifting baffle.

[0016] A control system of the positioning device, comprising the following steps:

[0017] The profile steel enters the sawing area, the counting baffle is lifted to the high position to block the profile steel, the positioning device moves to the sawing area, and the hydraulic swing arm mechanism falls; the counting baffle is accurately controlled to fall to the counting position through the stroke encoder, and the horizontal center surface of the counting wheel is in the same height as the lower plane of the web of the profile steel;

[0018] The roller table starts to run, the counting wheel rotates in contact with the lower web of the profile steel, the pressure of the counting wheel spring prevents the counting wheel from slipping, and the counting encoder counts the actual length of the profile steel;

[0019] The roller table stops, the movable baffle blocks or presses the profile steel, and the sawing machine starts to saw the profile steel.

[0020] Compared with the prior art, the positioning device and the control system have the following advantages:

[0021] The positioning device and the control system of different fixed-length profile steels are rationally designed, the movable baffle is designed to increase the original blocking function to a blocking function plus a pressing-down function, the positioning and sawing of long fixed-length profile steels are realized, the counting wheel and the encoder are designed on the top of the lifting baffle, the counting wheel reliably contacts the profile steel at the counting position, the positioning of the baffle and the counting of the encoder are realized at the same reference point, the fixed-length accuracy is ensured, efficient production is realized, and the different fixed-length measurement modes are automatically selected according to different fixed lengths and accurately sawed by cooperating with the fixed-length sawing control program. BRIEF DESCRIPTION OF DRAWINGS

[0022] The content expressed by each figure in the specification and the marks in the figures are briefly described as follows:

[0023] Figure 1 It is a profile steel rolling production process schematic diagram of the present application.

[0024] Figure 2 It is a multiple fixed-length machine schematic diagram of the present application.

[0025] Figure 3 It is a walking mechanism schematic diagram of the present application.

[0026] Figure 4 It is a locking mechanism schematic diagram of the present application.

[0027] Figure 5 It is a movable baffle mechanism schematic diagram of the present application.

[0028] Figure 6Counting baffle diagram for the present application.

[0029] Figure 7 Sawing diagram for the present application.

[0030] Figures 8 to 10 Control system diagram for the present application.

[0031] In the figure:

[0032] 1. rough rolling mill group, 2. head cutting machine, 3. finishing rolling mill group, 4. sawing machine, 5. cooling bed,

[0033] 6. multiple sizing machine, 61. frame, 611. oil cylinder base, 612. swing arm base, 613. locking base, 614. walking base, 62. walking mechanism, 621. wheel, 622. guide wheel, 623. motor, 624. speed reducer, 625. walking pinion, 626. encoder, 63. locking mechanism, 631. clamping oil cylinder, 632. clamping jaw, 64. drag chain mechanism, 65. hydraulic swing arm mechanism 651. lifting and retracting oil cylinder, 652. swing arm, 66. movable baffle mechanism, 661. baffle base, 6611. sliding groove, 662. double guide cylinder, 663. movable baffle, 6631. guide block, 6632. pressing block, 67. rail rack mechanism, 671. upper rail, 672. rack, 673. side rail, 674. locking and clamping rail,

[0034] 7. finished product sizing machine, 8. finished product sawing machine,

[0035] 9. counting baffle, 91. lifting baffle, 92. base, 93. electric screw, 931. upper screw, 932. speed reducer, 933. travel encoder, 911. counting wheel, 912. bearing, 913. guide frame, 914. guide rod, 915. spring, 916. counting encoder, 917. guide block, 918. sliding seat, 919. sliding block. DETAILED DESCRIPTION

[0036] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0037] As Figures 1 to 10 shown, the positioning device for different sizing steel corresponds to the sawing machine on the hot rolling production line, i.e. the multiple sizing machine 6 which can realize positioning of super design length sizing; the positioning device includes a frame and a walking mechanism, a locking mechanism and a swing arm mechanism provided on the frame, and the swing arm mechanism is provided with a movable baffle mechanism for positioning the steel on the production line.

[0038] A corresponding sawing machine is provided with a counting baffle; the counting baffle comprises a lifting baffle, a base and an electric screw rod; a profile groove is arranged at the top of the counting baffle, a movable guide frame is arranged in the profile groove, a counting wheel and a counting encoder are arranged on the guide frame in association; a sliding groove is arranged on the base, a sliding block matched with the sliding groove is arranged on the side surface of the lifting baffle, and the electric screw rod is arranged on the sliding block and associated with the lifting baffle. A speed reducer for driving the electric screw rod is arranged on the base, and a stroke encoder is arranged corresponding to the speed reducer, so as to accurately control the lifting height of the lifting baffle; the lifting baffle has three working positions, which are a lowest reference position, a highest position and a measuring counting position.

[0039] The present application solves the technical problem of being unable to perform long sizing on the basis of the original sizing machine process by adopting two sizing modes of blocking and pressing, that is, the fixed baffle is innovatively designed as a movable baffle, and the original blocking positioning mode is increased to blocking positioning plus pressing positioning, so that long sizing exceeding the design can be realized; the movable baffle is controlled by a rolling screw rod to realize accurate control of three positions of zero position, high position and counting position; a counting wheel and an encoder are arranged at the top of the lifting baffle, the counting wheel reliably contacts the profile steel at the counting position, the baffle positioning and the counting of the encoder are realized at the same reference point, and the sizing accuracy is ensured.

[0040] The control system of the positioning device comprises the following steps:

[0041] The profile steel enters the sawing area, the counting baffle is lifted to the high position to block the profile steel, the positioning device moves to the sawing area, and the hydraulic swing arm mechanism falls; the counting baffle accurately falls to the counting position through the stroke encoder, and the horizontal center surface of the counting wheel is at the same height as the lower plane of the web of the profile steel;

[0042] The roller starts to run, the counting wheel contacts and rotates with the lower web of the profile steel, the pressure of the counting wheel spring prevents the counting wheel from slipping, and the counting encoder counts the actual length of the profile steel;

[0043] The roller stops running, the movable baffle blocks or presses the profile steel, and the sawing machine starts to saw the profile steel.

[0044] Through the sizing sawing control program, different sizing measurement methods are automatically selected according to different sizes, and accurate sawing is realized, so that the production rhythm is efficient and fast.

[0045] The preferred specific examples of the present application are as follows:

[0046] As shown in Figure 1 , the profile steel rolling production process generally comprises the following steps: a cast blank is heated in a heating furnace, is dephosphorized, enters an initial and intermediate rolling mill group 1, is cut by a head cutting machine 2, is rolled in a finishing rolling mill group 3, a sizing machine 6 is moved to a required sizing position, a sawing machine 4 cuts the profile steel to a required size and cuts off a tail part, enters a cooling bed 5 to be step cooled, a finished product sizing machine 7 is positioned, a finished product sawing machine 8 is cut, and the finished product is inspected, packaged and delivered.

[0047] AsFigure 2 As shown, the present application fixed size machine 6 and finished product fixed size machine 8 structure form and the existing equipment is basically the same, including the rack 61, walking mechanism 62, locking mechanism 63, power medium drag chain mechanism 64, hydraulic swing arm mechanism 65, movable baffle mechanism 66, track rack mechanism 67, etc.; wherein the rack 61 upper part is provided with oil cylinder base 611, swing arm base 612, lower part is processed with locking base 613 of locking mechanism 63 installation, walking base 614 of walking mechanism 62 installation.

[0048] As shown, Figure 3 The walking mechanism 62 includes wheels 621, guide wheels 622, motors 623, reducers 624, walking pinions 625, encoders 626; the track rack mechanism 67 is composed of upper tracks 671, racks 672, side tracks 673, clamping rails 674; wherein the reducer 624 is fixed on the walking base 614 on the rack 61, the wheel 621 is in contact with the upper track 671, the guide wheel 623 is in contact with the side track 673, the walking pinion 625 is engaged with the rack 672, and the stable operation of the rack 61 on the track rack mechanism 67 is ensured.

[0049] The rack is provided on the side of the production line, the motor is fixed on the rack and arranged downward, the walking pinion is connected with the rotating shaft of the motor and engaged with the outside of the rack, and the structure is compact.

[0050] As shown, Figure 4 The locking mechanism 63 is composed of clamping oil cylinder 631 and clamping jaw 632, wherein the clamping oil cylinder 631 is installed on the locking base 613, controls the opening and closing of the clamping jaw 632, locks the clamping rail 674, and avoids the movement of the rack 61; the hydraulic swing arm mechanism 65 is composed of lifting and retracting oil cylinder 651 and swing arm 652, one side of the lifting and retracting oil cylinder 651 is connected with the oil cylinder base 611, and the other side is connected with the swing arm 652; one side of the swing arm 652 is connected with the swing arm base 612, and the other side is connected with the lifting and retracting oil cylinder 651; the lifting and retracting oil cylinder 651 acts to lift the swing arm 652 to allow the row type steel to rise and the positioning type steel to fall;

[0051] As shown, Figure 5As shown, the movable baffle mechanism 66 is composed of a baffle base 661, a double-guide cylinder 662, and a movable baffle 663. The upper part of the baffle base 661 is connected with the swing arm 652 and moves up and down synchronously with the swing arm 652. The middle and lower part of the baffle base 661 is hollow, and the two sides are provided with sliding grooves 6611. The sliding grooves 6611 are asymmetrically distributed, and the thickness of the front part of the sliding grooves 6611 is smaller than that of the rear part, so as to increase the thickness of the running direction of the profile steel and enhance the positioning strength of the movable baffle 663. The middle and upper part of the baffle base 661 is designed as a split layer, so as to facilitate the installation of the double-guide cylinder 662. The piston rod of the double-guide cylinder 662 is connected with the movable baffle 663, and the double-guide sliding rod design can ensure that the action trajectory is not skewed and avoid the movable baffle 663 from being squeezed and scraped in the sliding groove of the baffle base 661. The two sides of the movable baffle 663 are provided with guide blocks 6631, which cooperate with the sliding grooves 6611 of the baffle base 661 to slide up and down. The bottom of the movable baffle 663 is provided with a pressing block 6632, so as to increase the effective contact area between the movable baffle 663 and the profile steel when the movable baffle 663 is pressed down.

[0052] As shown in Figure 6 A counting baffle 9 is designed, which is composed of a lifting baffle 91, a base 92, and a motor lead screw 93. The lifting baffle 91 is installed on a guide frame 913 through a bearing 912, and a counting encoder 916 is installed on the shaft head of a counting wheel 911. The guide frame 913 is provided with guide blocks 917, which cooperate with guide grooves on a sliding seat 918 to move up and down. The guide frame 913 and the sliding seat 918 are provided with holes, and a guide rod 914 and a spring 915 are installed to provide the guide frame 913 with a pressure value. The sliding seat 918 is provided with sliding blocks 919, which cooperate with sliding grooves 921 on the base 92 to move up and down. The upper part of the motor lead screw 93 is connected with the bottom of the sliding seat 918, and the bottom of the base 92 is connected with a speed reducer 932. The lifting baffle 9 has three working positions, i.e., the lowest position "0" reference position, the highest position blocking position, and the measurement counting position, through the counting of a stroke encoder 933 to accurately control the up and down movement height of the sliding seat 918. The measurement counting position is the position where the horizontal plane of the counting wheel 911 coincides with the horizontal plane of the lower web of the H-shaped steel, so as to record the elevation size of the lower web of the H-shaped steel of different specifications, and the control system automatically outputs the measurement counting position according to different specifications.

[0053] As shown in Figure 7As shown, the steel section enters the sawing area, and the counting baffle 9 rises to a high position to block the steel section. Based on the actual sawing length A1A0, the length-limiting machine 6 either moves towards the sawing area and the hydraulic swing arm mechanism 65 lowers; or it stops at position 0 and the hydraulic swing arm mechanism 65 lowers; or it stops at position 0, the hydraulic swing arm mechanism 65 lowers, and the movable baffle 663 rises. The counting baffle 9 is accurately controlled by the stroke encoder 633 to fall to the counting position, and the horizontal center plane of the counting wheel 911 is at the same height as the lower plane of the steel section's web. The roller conveyor starts operating, and the counting wheel 911 contacts and rotates with the lower web of the steel section. The pressure of the spring 915 prevents the counting wheel 911 from slipping, and the counting encoder 916 counts the actual length of the steel section. When the actual length X = X1 - Y, the roller conveyor stops rotating, the movable baffle 663 either blocks or presses down the steel section, the counting baffle 9 falls back to its original position, and the sawing machine 4 begins sawing the steel section.

[0054] like Figures 8 to 10 As shown, NCM is the "numerical comparison" function block. When A1A0 > design length, B1 is "1", when A1A0 < design length, B2 is "1", and when A1A0 = design length, B3 is "1". NSW is the "digital input switching switch" function block. When I is "1", Y = X2, and when I is "0", Y = X1. RSR is the "RS flip-flop with R priority at reset terminal" function block. SUB is the "subtraction" function block. MUL is the "multiplication" function block. PDE is the "delay" function block. OR is the "OR" gate. AND is the "AND" gate. NOT is the "NOT" gate. The fixed-length control program consists of seven control units: function blocks DCTTC11-DCTTC17 constitute the fixed-length judgment control unit; function blocks DCTTC21-DCTTC25 constitute the standard fixed-length steel entry sawing zone control unit; function blocks DCTTC301-DCTTC310 constitute the standard fixed-length steel positioning sawing control unit; function blocks DCTTC41-DCTTC46 constitute the short fixed-length steel entry sawing zone control unit; function blocks DCTTC501-DCTTC515 constitute the short fixed-length steel positioning sawing control unit; function blocks DCTTC61-DCTTC65 constitute the long fixed-length steel entry sawing zone control unit; and function blocks DCTTC701-DCTTC714 constitute the long fixed-length steel positioning sawing control unit.

[0055] like Figure 8 As shown, for example, the distance between the sawing machine and the cutting machine (position 0) on the steel production line is 24 meters, and the required cutting length is input as A1A. 0，The low bit value comparison function block DCTTC11 and the high bit value comparison function block DCTTC12 and the and, or function block logic control. When A1A0=24 meters, B3 outputs "1", the sawing area photoelectric signal A', the encoder 933 "0" bit, the saw blade lifting bit, the encoder 626 "0" bit meet the conditions, the and function block DCTTC21 outputs "1"; I is 1 in the NSW function block DCTTC22, Y=X2, the encoder 933 high bit, the counting baffle 91 rises to the highest bit; the roller rotation signal is given, the roller rotates the profile steel to run, when the sawing area photoelectric signal B' triggers, the profile steel hits the lifting baffle 91, the roller stops rotating C;

[0056] The input B3, C and the sizing machine 6 encoder 626 is in "0" bit, the cylinder 662 of the movable baffle 66 is in low bit; the "and" function block DCTTC301 and the "not" function block DCTTC302 output "0" signal, I is 0 in the NSW function block DCTTC22, Y=X1, the encoder 933 counting bit, the lifting baffle 91 falls, and the counting wheel 911 horizontal center surface is ensured to be in the same height with the profile steel web lower plane (the encoder 933 counting bit is calculated according to different profile steel different specifications and sizes and is recorded in the system). The roller rotation signal is given, the counting encoder 916 starts counting, the encoder guide wheel circumference is 314 mm, through the MUL function block DCTTC306 and the NCM function block DCTTC307, the profile steel runs to the accurate position and hits the movable baffle 66, the roller stops rotating, the encoder 933 falls "0" bit, after 0.2S delay, the saw blade is pressed down to start sawing, after 10S delay, the sawing is finished, and the saw blade is lifted up.

[0057] As shown in Figure 9 The low bit value comparison function block DCTTC11 and the high bit value comparison function block DCTTC12 and the and, or function block logic control. When A1A0=24 meters, B3 outputs "1", the sawing area photoelectric signal A', the encoder 933 "0" bit, the saw blade lifting bit, the encoder 626 "0" bit meet the conditions, the and function block DCTTC21 outputs "1"; I is 1 in the NSW function block DCTTC22, Y=X2, the encoder 933 high bit, the counting baffle 91 rises to the highest bit; the roller rotation signal is given, the roller rotates the profile steel to run, when the sawing area photoelectric signal B' triggers, the profile steel hits the lifting baffle 91, the roller stops rotating C;

[0058] B2 signal input NSW function block DCTTC 501, I = 1, Y = X2 = A1A0 input to SUB subtraction function block DCTTC 502 X1, get X1-X2 = -(24-A1A0); B2 signal trigger sizing machine 6 to sawing machine direction operation, encoder 626 count, its encoder guide wheel circumference -628 mm, through MUL "multiplication" function block DCTTC 504 calculation running length, compared with -(24-A1A0), when the value is equal, NCM "numerical comparison" function block QE output "1", and with C, the cylinder 662 low position or gate and NOT gate output "0" signal, NSW "digital input switch" function block I = X1, count the baffle 91 down to the encoder 933 count bit;

[0059] Give the roller rotation signal, the encoder 916 begins to count, its encoder guide wheel circumference 314 mm, through MUL function block DCTTC 511, NCM function block DCTTC 512, the profile steel runs to A1A0 accurate position and against the movable baffle 66, the roller stops rotating the encoder 933 down "0" bit, PDE delay function block DCTTC 514 delay 0.2S after the saw blade is pressed down to start sawing, PDE delay function block DCTTC 515 delay 10S after sawing is finished, the saw blade is lifted up.

[0060] The second profile steel with the encoder 933 down "0" bit and the saw blade lifting signal is directly input to the NSW "digital input switch" function block, avoiding the sizing machine 6 to move back and forth between "0" bit and -(24-A1A0) bit.

[0061] As shown in 10, input the cutting sizing length A1A0, through the low bit numerical comparison function block DCTTC 11 and the high bit numerical comparison function block DCTTC 12 and with, or function block logic control. When A1A0>24 meters, B1 output "1", the sawing area photoelectric signal A', the encoder 933 "0" bit, the saw blade lifting bit, the encoder 626 "0" bit meet the conditions, and the function block DCTTC 61 output "1"; the NSW function block DCTTC 62 I is 1, Y = X2, the encoder 933 high bit, the counting baffle 91 rises to the highest bit; give the roller rotation signal, the roller rotates the profile steel to run, when the sawing area photoelectric signal B' triggers, the profile steel is against the counting baffle 91, the roller stops rotating and gives "1" signal through the NOT function block DCTTC 65;

[0062] B1 signal triggers the cylinder 662 of the movable baffle 66 to be in the high position, and C, the walking encoder 662 of the sizing machine 6 is in the "0" position, through the AND function block and the NOT function block, the NSW "digital input switch" function block I = X1, the counting baffle 91 is lowered to the encoder 933 count bit;

[0063] When the roller is rotating, the counting encoder 916 starts counting, the encoder guide wheel circumference is 314 mm, through the MUL function block DCTTC507 and the NCM function block DCTTC508, the profile steel runs to the accurate position of A1A0 and is stopped at the movable baffle 66, the roller stops rotating, the encoder 933 is lowered to the "0" position, and the RSR function block DCTTC710 is triggered to press down the cylinder of the movable baffle 6, the PDE delay function block DCTTC712 delays for 0.2S, then the saw blade is pressed down to start sawing, the PDE delay function block DCTTC713 delays for 10S, then the sawing is finished, the saw blade is lifted, and the cylinder is lifted.

[0064] The positioning device and the control system of different fixed-length profile steels are reasonable in design, the movable baffle is designed to increase the original blocking function to the blocking function and the pressing-down function, the positioning and sawing of the long fixed-length profile steel are realized, the counting wheel and the encoder are designed on the top of the lifting baffle, the counting wheel reliably contacts the profile steel when the counting position is counted, the baffle positioning and the encoding counting are realized at the same reference point, the fixed-length precision is ensured, and the efficient production is realized, the fixed-length sawing control program is applied, different fixed-length measurement modes are automatically selected according to different fixed lengths, and accurate sawing is realized, and the production rhythm is efficient and fast.

[0065] The above only describes the preferred embodiments of the present application, and the above technical features can be combined to form multiple embodiments of the present application.

[0066] The present application is described above in combination with the drawings, and it is obvious that the specific implementation of the present application is not limited by the above mode, as long as the concept and technical scheme of the present application are adopted for various non-essential improvements or the concept and technical scheme of the present application are directly applied to other occasions without improvement, all of which are within the protection scope of the present application.

Claims

1. A positioning device for different sized steel sections, said positioning device being arranged in correspondence with a sawing machine on a hot rolling production line, characterized in that: The positioning device comprises a frame, a walking mechanism, a locking mechanism and a swing arm mechanism provided on the frame, and the swing arm mechanism is provided with a movable baffle mechanism for positioning the profile steel on the production line.

2. The positioning device for different sized steel sections as claimed in claim 1 wherein: The walking mechanism comprises wheels, guide wheels, a motor and a walking pinion; a track rack mechanism is provided on the production line, the track rack mechanism comprises an upper track, a rack and a side track; the wheels are in contact with the upper track, the guide wheels are in contact with the side track, and the walking pinion is in mesh with the rack.

3. The positioning device for different sized steel sections as claimed in claim 2 wherein: The locking mechanism comprises a clamping jaw and a clamping cylinder for driving the clamping jaw to work, and the track rack mechanism further comprises a clamping rail, and the clamping jaw is arranged correspondingly to the clamping rail.

4. The positioning device for different sized steel sections as claimed in claim 2 wherein: The rack is arranged on the side of the production line, the motor is fixed on the frame and arranged downward, the walking pinion is connected with the rotating shaft of the motor and in mesh with the outer side of the rack.

5. The positioning device for different sized steel sections as claimed in claim 1 wherein: The swing arm mechanism comprises a lifting cylinder and a swing arm; one end of the lifting cylinder is connected with a cylinder base arranged on the frame, and the other end of the lifting cylinder is connected with the swing arm; one end of the swing arm is connected with a swing arm base arranged on the frame, and the movable baffle mechanism is arranged on the other end of the swing arm.

6. The positioning device for different sized steel sections as claimed in claim 5 wherein: The movable baffle mechanism comprises a baffle base, a guide cylinder and a movable baffle; the upper part of the baffle base is connected with the other end of the swing arm; the middle and lower parts of the baffle base are hollowed out, and the two sides are provided with sliding grooves; the movable baffle is movably arranged in the hollowed-out area, the edge of the movable baffle is provided with guide blocks matched with the sliding grooves, and the movable baffle is connected with the piston rod of the guide cylinder.

7. The positioning device for different sized steel sections as claimed in claim 6 wherein: The front and rear parts of the sliding groove are designed asymmetrically, the thickness of the rear part is greater than that of the front part, and the bottom of the movable baffle is provided with a pressing block for increasing the contact area with the profile steel.

8. The positioning device for different sized steel sections as claimed in claim 1 wherein: A counting baffle is arranged correspondingly to the sawing machine; the counting baffle comprises a lifting baffle, a base and an electric screw rod; a profile groove is arranged on the top of the counting baffle, a movable guide frame is arranged in the profile groove, a counting wheel and a counting encoder are arranged on the guide frame in connection; a sliding groove is arranged on the base, a sliding block matched with the sliding groove is arranged on the side surface of the lifting baffle, and the electric screw rod is arranged on the sliding base and connected with the lifting baffle.

9. The positioning device for different sized steel sections as claimed in claim 8 wherein: A speed reducer is arranged on the base for driving the electric screw rod, a stroke encoder is arranged correspondingly to the speed reducer, and the lifting height of the lifting baffle is accurately controlled; the lifting baffle has three working positions, which are a lowest reference position, a highest position and a measuring counting position.

10. A control system for a positioning device as claimed in any one of claims 1 to 9, characterized in that: The control system comprises the following steps: The profile steel enters the sawing area, the counting baffle is lifted to the highest position to block the profile steel, the positioning device moves to the sawing area, and the hydraulic swing arm mechanism falls; the counting baffle is accurately controlled to fall to the counting position by the stroke encoder, and the horizontal center surface of the counting wheel is in the same height with the lower plane of the profile steel web; The roller way starts to run, the counting wheel is in contact with the lower web of the profile steel and rotates, the pressure of the counting wheel spring makes the counting wheel not slip, and the counting encoder counts the actual length of the profile steel; The roller way stops, the movable baffle blocks the profile steel or presses the profile steel, and the sawing machine starts to cut the profile steel.

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