A laser rust removal device for galvanized base strip steel

Abstract

The application discloses a kind of laser rust removal equipment for galvanized base strip steel, including base, and the top of base is equipped with laser rust removal assembly and two groups of pinch roll assembly;Pinch roll assembly is symmetrically set perpendicularly to strip steel conveying direction, and laser rust removal assembly is arranged between pinch roll assembly, and strip steel is conveyed into laser rust removal assembly using pinch roll assembly, and laser rust removal assembly is divided into surface rust removal unit and side rust removal unit, and the upper and lower surfaces of strip steel are rusted in surface rust removal unit, and the side edge of strip steel is rusted in side rust removal unit, and the residual oxide scale on strip steel is cleaned cooperatively, to provide basis for subsequent welding process, improve product quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rust removal equipment, in particular to a laser rust removal equipment for galvanized base strip steel. BACKGROUND

[0002] Continuous hot-dip galvanizing process is a common surface treatment technology, and hot-dip galvanized products have excellent corrosion resistance, low cost, long service life and other characteristics, so they are widely used in the fields of construction, household appliances, machinery and automobile manufacturing. With the increasing market demand for hot-dip galvanized steel sheets, the requirements for the surface quality and formability of hot-dip galvanized products in various industries are also becoming higher and higher.

[0003] The hot-dip galvanizing process flow is: feeding → unwinding → clamping and conveying, straightening → welding → surface pre-cleaning → inlet loop → annealing → hot-dip galvanizing → alloying → cooling → intermediate loop → finishing → stretch bending straightening → post-processing → inspection and winding. Due to the high speed of the continuous hot-dip galvanizing high-speed unit production line, under the condition of constant loop capacity, the welding time is short. Currently, the head and tail of the galvanized base strip steel need to be cut off before welding. The galvanized base strip steel surface is covered with iron oxide scale, which will cause poor welding quality if immersed in the weld. In severe cases, there is a risk of broken strip. Therefore, due to poor welding quality, the original weld needs to be cut off and re-welded, which will cause the loop capacity to be unable to meet the production demand without reducing the production speed, forcing the production line to slow down and causing the process parameters of the production line to fluctuate greatly, such as the risk of furnace temperature rising, strip temperature rising sharply, strip producing thermal wrinkles, coating thickness thinning, etc., disrupting the production rhythm. Therefore, there is an urgent need for a laser rust removal equipment for galvanized base strip steel to remove the residual iron oxide scale on the surface of the galvanized base strip steel before welding. SUMMARY

[0004] The present application provides a laser rust removal equipment for galvanized base strip steel, which effectively removes the residual iron oxide scale on the surface of the galvanized base strip steel to improve the welding quality and produce high-quality hot-dip galvanized products.

[0005] The present application is a laser rust removal equipment for galvanized base strip steel, which comprises a base, a laser rust removal assembly and two sets of clamping and conveying assemblies arranged symmetrically vertically to the conveying direction of the strip on the top of the base.

[0006] The clamping and conveying assemblies are arranged symmetrically vertically to the conveying direction of the strip, and each clamping and conveying assembly comprises a stand fixed to the base, a support roller fixed to the lower part of the stand, a hollow upper part of the stand, a sliding block connected to the hollow part, and a conveying roller rotatably connected to the sliding block; a first telescopic member is arranged on the top of the stand, the telescopic end of the first telescopic member penetrates through the top of the stand and is connected to the sliding block, and the conveying roller is driven by a first driving member.

[0007] The laser rust removal assembly is arranged between the pinch rollers and comprises a surface rust removal unit and a side rust removal unit.

[0008] The side rust removal unit is arranged on the two sides of the strip in a staggered manner and comprises an F-shaped frame driven by a second driving member.

[0009] Preferably, the surface rust removal device below the strip passing direction is connected with the inner wall of the rust removal chamber through a mounting bracket, and the bottom of the inner cavity of the rust removal chamber is provided with a collecting frame.

[0010] Preferably, the bottom of the collecting frame is symmetrically provided with a plurality of pulleys, and the collecting frame is provided with a second handle on the side close to the first handle.

[0011] Preferably, the inner wall of the rust removal chamber above the collecting frame is symmetrically provided with an inclined guide plate inclined toward the collecting frame.

[0012] Preferably, the bottom of the base is symmetrically provided with an H-shaped support, the H-shaped support is provided with a moving wheel, and the moving wheel is provided with a matching sliding rail.

[0013] Preferably, the side of the rust removal chamber adjacent to the strip passage is provided with a movable door, and the movable door is provided with a first handle and an observation window.

[0014] Preferably, the inner ring of the strip passage is provided with a soft brush.

[0015] Preferably, the outer side of the longitudinal portion of the F-shaped frame and the free end of the transmission screw are both supported by bearing seats.

[0016] Preferably, the first driving member and the second driving member are both step motors or servo motors.

[0017] Preferably, the first telescopic member and the second telescopic member are both electric telescopic rods or air cylinders.

[0018] The beneficial effects of the present application are as follows:

[0019] 1. The laser rust removal equipment for galvanized base material strip steel provided by the present application uses the pinch roll assembly to convey the strip steel into the laser rust removal assembly, the laser rust removal assembly is divided into a surface rust removal unit and a side rust removal unit, the strip steel is comprehensively rust removed, the residual mill scale on the strip steel is cleaned, a basis is provided for subsequent welding process, a finished product with good weld quality is obtained, the risk of strip steel cracking and strip breakage is reduced, the finished product quality and production efficiency are improved, and a guarantee is provided for subsequent hot coating plating safe and orderly production.

[0020] 2. The laser rust removal equipment for galvanized base material strip steel provided by the present application, the pinch roll assembly and the laser rust removal assembly are both fixedly arranged on the base, the base bottom is provided with moving wheels, movement is flexible, and offline maintenance and online use are facilitated.

[0021] 3. The laser rust removal equipment for galvanized base material strip steel provided by the present application, the surface rust removal device is symmetrically provided with protective frames at both sides, the free end of the protective wheel at the end of the protective frame exceeds the head of the first laser head, the surface rust removal device can be prevented from being accidentally damaged due to sudden abnormal breakage or plate type failure of the strip steel, the outer side of the limiting roller at both sides of the side rust removal device exceeds the head of the second laser head, on the one hand, the second laser head can be protected from being damaged by the strip steel, and on the other hand, the strip steel can be limited, the safety performance is high, and the service life is long.

[0022] 4. The laser rust removal equipment for galvanized base material strip steel provided by the present application, the inner ring of the strip steel passage of the rust removal chamber is provided with a soft brush, dust and rust powder adhered to the strip steel can be continuously cleaned and swept into the rust removal chamber, and the slanted guide plates symmetrically arranged on the inner wall of the rust removal chamber flow into the collection frame at the bottom of the rust removal chamber, so that the dust and rust powder are concentratedly collected and periodically cleaned. DETAILED DESCRIPTION

[0023] Figure 1 It is a whole structure schematic view of the laser rust removal equipment for galvanized base material strip steel of the present application;

[0024] Figure 2 It is a front view of the side rust removal unit of the present application;

[0025] Figure 3 It is a left view of Figure 2 ;

[0026] Figure 4 It is a top view of Figure 2 ;

[0027] Figure 5 This is a schematic diagram of the rust removal chamber structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the operation of the laser rust removal equipment for galvanized base steel strip of the present invention;

[0029] In the diagram: 1-Laser rust removal equipment; 2-Base; 21-H-type bracket; 22-Moving wheel; 23-Sliding rail; 3-Laser rust removal component; 4-Clamping component; 41-First telescopic component; 42-Transmitting roller; 43-Slider; 44-Support roller; 45-Column; 5-Strip steel; 6-Surface rust removal unit; 61-Rust removal chamber; 62-Strip steel channel; 63-Surface rust removal device; 64-Mounting frame; 65-Second telescopic component; 66-Protective frame; 67-Protective wheel; 68-Collection frame; 69-Soft brush; 601-First handle; 602-Observation window; 603-Pulley; 604-Second handle; 605-Angled guide plate; 606-Moving door; 7-Side rust removal unit; 71- F-type frame; 72-double-acting screw; 73-mounting shaft; 74-limiting roller; 75-side rust removal device; 76-limiting plate; 77-drive motor; 78-transmission screw; 79-stop block; 701-first stop position limiter; 702-first deceleration position sensor; 703-second deceleration position sensor; 704-second stop position limiter; 705-bearing seat. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings:

[0031] like Figures 1-6 As shown, the present invention is a laser rust removal device for galvanized base steel strip. The laser rust removal device 1 includes a base 2, a laser rust removal component 3 and two sets of clamping components 4 are provided on the top of the base 2; H-shaped brackets 21 are symmetrically provided at the bottom of the base 2, and moving wheels 22 are sleeved on the horizontal part of the H-shaped brackets 21. The bottom of the moving wheels 22 is provided with matching sliding rails 23 to facilitate the movement of the base 2.

[0032] The clamping assembly 4 is symmetrically arranged perpendicular to the conveying direction of the strip steel 5. The clamping assembly 4 includes a column 45 fixedly connected to the base 2. A support roller 44 is fixedly connected to the lower part of the column 45. The upper part of the column 45 is hollow, and a slider 43 is slidably connected to the hollow part. A conveying roller 42 is rotatably connected to the slider 43. A first telescopic member 41 is provided at the top of the column 45. The telescopic end of the first telescopic member 41 passes through the top of the column 45 and is connected to the slider 43. The conveying roller 42 is driven by a first driving member (which can be achieved by existing technology, not shown in the figure).

[0033] The laser rust removal assembly 3 is arranged in the middle of the pinch assembly 4, and includes a surface rust removal unit 6 and a side rust removal unit 7. The surface rust removal unit 6 includes a rust removal chamber 61 arranged at the center of the two groups of pinch assemblies 4, and the rust removal chamber 61 is provided with a strip steel passage 62 on both sides along the strip steel 5 entering direction. A soft brush 69 is arranged in the inner ring of the strip steel passage 62. A movable door 606 is arranged on one side of the rust removal chamber 61 adjacent to the strip steel passage 62, and the movable door 606 is provided with a first handle 601 and an observation window 602. Symmetrical surface rust removal devices 63 are arranged on the two inner walls of the rust removal chamber 61 perpendicular to the strip steel 5 entering direction. The surface rust removal device 63 on the lower side of the strip steel 5 entering direction is connected with the inner wall of the rust removal chamber 61 through a mounting bracket 64. The surface rust removal device 63 includes a second telescopic member 65, which is an electric telescopic rod. A first laser head is connected to the telescopic end of the second telescopic member 65. Protective frames 66 are symmetrically arranged on both sides of the surface rust removal device 63. One end of the protective frame 66 is fixedly connected with the inner wall of the rust removal chamber 61, and the other end is connected with a protective wheel 67. The free end of the protective wheel 67 exceeds the head of the first laser head. A collecting frame 68 is arranged at the bottom of the inner cavity of the rust removal chamber 61. Six groups of pulleys 603 are symmetrically arranged at the bottom of the collecting frame 68. A second handle 604 is arranged on one side of the collecting frame 68 close to the first handle 601. Symmetrical inclined guide plates 605 are arranged on the inner wall of the rust removal chamber 61 above the collecting frame 68 and inclined towards the collecting frame 68.

[0034] The side rust removal unit 7 is arranged on both sides of the strip steel 5 in a staggered manner, and includes an F-shaped frame 71. The F-shaped frame 71 is driven by a second driving member (which can be realized by existing technology, not shown in the figure). The second driving member is a servo motor. The bottom of the F-shaped frame 71 is threadedly connected with the base 2 through a bidirectional screw 72. Vertical mounting shafts 73 are symmetrically arranged between the two horizontal parts of the F-shaped frame 71. Limiting rollers 74 are sleeved on the mounting shafts 73. Side rust removal devices 75 are vertically arranged on the longitudinal part of the F-shaped frame 71 between the limiting rollers 74. A second laser head is connected to one end of the side rust removal device 75 close to the strip steel 5, and the other end penetrates through the F-shaped frame 71. The outer side of the limiting roller 74 exceeds the head of the second laser head, and the outer side of the limiting roller 74 abuts against the side edge of the strip steel 5. A limiting plate 76 is arranged at the joint of the side rust removal device 75 and the F-shaped frame 71. The limiting plate 76 is slidingly connected with the F-shaped frame 71. A driving motor 77 and a bearing seat 705 are arranged on the outer side of the longitudinal part of the F-shaped frame 71. A vertical transmission screw 78 is connected with the output end of the driving motor 77. The free end of the transmission screw 78 penetrates through the side rust removal device 75 and is supported by the bearing seat 705. From top to bottom, a first stop position limiter 701, a first deceleration position sensor 702, a second deceleration position sensor 703 and a second stop position limiter 704 are sequentially arranged on the F-shaped frame 71 in the moving direction of the side rust removal device 75. A stop block 79 is arranged on one side of the side rust removal device 75 close to the first stop position limiter 701.

[0035] The pinch roll assembly 4 and the laser rust removal assembly 3 are controlled by the control system of the continuous hot galvanizing production line, and the control system receives signals of the first stop position limiter 701, the first deceleration position sensor 702, the second deceleration position sensor 703 and the second stop position limiter 704 to control the driving motor 77 to decelerate or stop.

[0036] Next, the laser rust removal working process is described by taking any strip steel 5 as an example.

[0037] First step: The strip steel 5 passes through the pinch roll assembly 4 at the starting end of the conveying direction. The roll surface of the pinch roll assembly 4 is a rubber roller. The line speed of the pinch roll assembly 4 is consistent with the line speed of the entry unwinder of the production line to prevent steel stacking. The tension between the support roller 44 and the conveying roller 42 enables the strip steel 5 to enter the strip steel passage 62. When conveying, the first telescopic part 41 drives the sliding block 43 to move downward along the hollow cavity of the pinch roll assembly 4. The sliding block 43 further drives the conveying roller 42 to move downward, so that the conveying roller 42 cooperates with the support roller 44 to extrude the strip steel 5. The first driving part drives the conveying roller 42 to rotate. The conveying roller 42 cooperates with the support roller 44 to convey the strip steel 5 and prevent the strip steel 5 from curling.

[0038] Second step: The side rust removal units 7 are arranged on the two sides of the strip steel 5 in a staggered manner. The outer side of the limiting roller 74 of the two side rust removal units 7 exceeds the head of the second laser head and abuts against the strip steel 5, thereby limiting the left and right deviation distance of the strip steel 5 to avoid the strip steel 5 from colliding and damaging the second laser head. The conveyed strip steel 5 first passes through the side rust removal units 7 to remove rust on both sides. The side rust removal device 75 is provided with a limiting plate 76 at the joint with the F-shaped frame 71. The limiting plate 76 is in sliding connection with the F-shaped frame 71. During rust removal, the driving motor 77 drives the transmission screw 78 to move up and down. The transmission screw 78 drives the side rust removal device 75 to move up and down along the F-shaped frame 71 to meet the rust removal work of different specifications of the strip steel 5. The F-shaped frame 71 is provided with the first stop position limiter 701, the first deceleration position sensor 702, the second deceleration position sensor 703 and the second stop position limiter 704 from top to bottom. The side rust removal device 75 is provided with a stop block 79 close to the first stop position limiter 701. The stop block 79 is used to trigger the signal of the side rust removal device 75 running to the upper and lower deceleration positions and the stop position. Therefore, when the control system of the continuous hot galvanizing production line receives the signal of the first deceleration position sensor 702 or the second deceleration position sensor 703 to control the driving motor 77 to decelerate, it indicates that the side rust removal device 75 has approached the upper and lower surface limit positions of the strip steel 5. When the control system of the continuous hot galvanizing production line receives the signal of the first stop position limiter 701 or the second stop position limiter 704 to control the driving motor 77 to stop, it indicates that the side rust removal device 75 has deviated from the strip steel 5 and cannot effectively perform the rust removal work. The control system ensures that the side rust removal device 75 operates within a safe range.

[0039] Third step: the flat strip steel 5 enters the rust removal chamber 61 through the strip steel passage 62, the surface rust removal device 63 is located at the central axis of the strip steel 5, and the surface rust removal device 63 performs accurate rust removal work on the upper and lower surfaces of the strip steel 5 during conveying according to the defect data of the continuous hot galvanizing production line control system; the protective frame 66 is symmetrically arranged on both sides of the surface rust removal device 63, the protective wheel 67 at the end of the protective frame 66 has a free end exceeding the head of the first laser head, so as to avoid accidental damage to the surface rust removal device 63 due to sudden abnormal fracture or poor plate shape of the strip steel 5;

[0040] Fourth step: when the rust removal chamber 61 is rusted, the soft brush 69 in the inner circle of the strip steel passage 62 continuously cleans the dust and rust powder adhered to the strip steel 5, sweeps into the rust removal chamber 61, and flows into the collection frame 68 at the bottom of the rust removal chamber 61 through the inclined guide plates 605 symmetrically arranged on the inner wall of the rust removal chamber 61; the rust removal chamber 61 adjacent to the strip steel passage 62 is provided with a first handle 601 and an observation window 602 on one side, the inside of the rust removal chamber 61 can be observed through the observation window 602, the movable door 606 is opened by holding the first handle 601, and the collection frame 68 is pulled out for regular cleaning by pulling the second handle 604;

[0041] Fifth step: the strip steel 5 after rust removal enters the support roller 44 and the conveying roller 42 at the end of the conveying direction, the sliding block 43 is driven downward by the extension end of the first extension piece 41, the conveying roller 42 is driven downward by the sliding block 43, the conveying roller 42 is pressed against the strip steel 5 in cooperation with the support roller 44, the first driving piece drives the conveying roller 42 to rotate, and the strip steel 5 is conveyed to the welding process by the conveying roller 42 cooperating with the support roller 44; when the front and rear steel roll welding machine group maintains the speed of the production line, the running speed of the strip steel 5 is greatly improved, the conveying roller 42 of the front and rear pinch roll assembly 4 is opened when the speed is greater than 30 m / min (since the running speed of the strip steel 5 is ≤30 m / min, the main purpose is to weld the strip steel 5, check the quality of the strip steel 5, handle equipment faults online, test speed, and handle process faults), and the tensioning roller of the production line and the uncoiler establish tension, so that the strip steel 5 can be kept flat, and only the support roller 44 needs to participate in the operation.

Claims

1. A laser derusting apparatus for a galvanised base strip steel, characterised in that: The laser rust removal equipment (1) comprises a base (2), the top of the base (2) is provided with a laser rust removal assembly (3) and two groups of pinch roll assemblies (4); The pinch roll assembly (4) is symmetrically arranged in the vertical direction of the strip steel (5) conveying direction, the pinch roll assembly (4) comprises a stand (45) fixedly connected with the base (2), the lower part of the stand (45) is fixedly connected with a supporting roller (44), the upper part of the stand (45) is hollow, the hollow part is slidably connected with a sliding block (43), the sliding block (43) is rotatably connected with a conveying roller (42); the top of the stand (45) is provided with a first telescopic piece (41), the telescopic end of the first telescopic piece (41) penetrates through the top of the stand (45) and is connected with the sliding block (43), the conveying roller (42) is driven by a first driving piece; The laser rust removal assembly (3) is arranged between the pinch roll assemblies (4) and comprises a surface rust removal unit (6) and a side rust removal unit (7), the surface rust removal unit (6) comprises a rust removal chamber (61) arranged at the central position of the two groups of pinch roll assemblies (4), the rust removal chamber (61) is provided with a strip steel passage (62) on both sides along the strip steel (5) penetration direction, and the rust removal chamber (61) is symmetrically provided with a surface rust removal device (63) on the inner walls in the vertical direction of the strip steel (5) penetration direction; the surface rust removal device (63) comprises a second telescopic piece (65), the telescopic end of the second telescopic piece (65) is connected with a first laser head; the surface rust removal device (63) is symmetrically provided with a protection frame (66) on both sides, one end of the protection frame (66) is fixedly connected with the inner wall of the rust removal chamber (61), the other end is connected with a protection wheel (67), and the free end of the protection wheel (67) exceeds the head of the first laser head; The side rust removal unit (7) is arranged on both sides of the strip steel (5) in staggered mode, comprising an F-shaped frame (71) driven by a second driving member; the bottom of the F-shaped frame (71) is screwed with the base (2) through a bidirectional screw rod (72), vertical mounting shafts (73) are symmetrically arranged between the two horizontal parts of the F-shaped frame (71), limit rollers (74) are sleeved on the mounting shafts (73), and the F-shaped frame (71) between the limit rollers (74) is vertically provided with a side rust removal device (75), the side rust removal device (75) is connected with a second laser head at one end close to the strip steel (5) and penetrates through the F-shaped frame (71) at the other end; the limit rollers (74) are outside the second laser head, and the outer side of the limit rollers (74) abuts against the side edge of the strip steel (5); a limiting plate (76) is arranged at the joint of the side rust removal device (75) and the F-shaped frame (71), the limiting plate (76) is in sliding connection with the F-shaped frame (71), a driving motor (77) is arranged on the outer side of the longitudinal part of the F-shaped frame (71), a vertical transmission screw rod (78) is connected with the output end of the driving motor (77), and the free end of the transmission screw rod (78) penetrates through the side rust removal device (75); the F-shaped frame (71) in the moving direction of the side rust removal device (75) is sequentially provided, from top to bottom, with a first stop position limiter (701), a first deceleration position sensor (702), a second deceleration position sensor (703) and a second stop position limiter (704), and a stop block (79) is arranged on the side of the side rust removal device (75) close to the first stop position limiter (701).

2. The apparatus for laser derusting of a galvanised substrate strip as claimed in claim 1, wherein: The surface rust removal device (63) below the penetration direction of the strip steel (5) is connected with the inner wall of the rust removal chamber (61) through a mounting rack (64), and the bottom of the inner cavity of the rust removal chamber (61) is provided with a collection frame (68).

3. A laser deruster for galvanized base strip steel as set forth in claim 2, wherein: A plurality of pulleys (603) are symmetrically arranged on the bottom of the collection frame (68), and a second handle (604) is arranged on one side of the collection frame (68) close to the first handle (601).

4. The apparatus for laser derusting of a galvanised strip steel of claim 3 wherein: The inner wall of the rust removal chamber (61) above the collection frame (68) is symmetrically provided with inclined guide plates (605) inclined toward the collection frame (68).

5. The apparatus for laser derusting of a galvanised substrate strip as claimed in claim 1, wherein: The bottom of the base (2) is symmetrically provided with H-shaped supports (21), the H-shaped supports (21) are sleeved with moving wheels (22), and the moving wheels (22) are provided with matching sliding rails (23).

6. The apparatus for laser derusting of a galvanised substrate strip as claimed in claim 1, wherein: The rust removal chamber (61) adjacent to the strip steel passage (62) is provided with a movable door (606), and the movable door (606) is provided with a first handle (601) and an observation window (602).

7. A laser deruster for galvanized base strip steel as defined in claim 6, wherein: The strip steel passage (62) is provided with soft hair brushes (69).

8. A laser derusting apparatus for galvanised substrate strip steel as claimed in any one of claims 1 to 7, wherein: The longitudinal outer side of the F-shaped frame (71) and the free end of the transmission screw rod (78) are both supported by bearing seats (705).

9. A laser deruster for galvanized base strip steel as defined in claim 8, wherein: The first driving member and the second driving member are both step motors or servo motors.

10. The apparatus for laser derusting of a galvanised strip steel of claim 9 wherein: The first telescopic member (41) and the second telescopic member (65) are both electric telescopic rods or air cylinders.

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