Precise multi-roller straightening machine

Abstract

A driving mechanism used for driving an upper swinging beam to swing is installed on the upper portion of a rack, a lower roller system is installed at the bottom of the rack, an upper roller system is installed at the bottom of the upper swinging beam, and the driving mechanism comprises a spiral elevator and a gear motor connected with the spiral elevator. An adjusting device C is arranged on the upper swinging beam; the adjusting device C comprises a sliding groove and a sliding block which are arranged on the upper swinging beam; the sliding block is connected with the spiral elevator through a rotating shaft; an adjusting distance is reserved between the sliding block and the sliding groove. Each adjusting device D comprises a sliding plate and two or more arc sliding plates, the sliding plates are arranged at the sliding grooves in the left side and the right side of the rack, and two or more arc sliding grooves are evenly formed in each sliding plate. When the upper swing beam swings, the arc sliding plate can freely rotate along the arc-shaped sliding groove in the sliding plate. The utility model has the characteristics of reasonable design, novel structure, good rigidity and high precision, so that the performance of the plate is qualitatively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of strip steel production, and specifically relates to straightening equipment. Background Art

[0002] As customers have higher and higher requirements for plate straightness, straightening equipment is required to have the characteristics of high precision, high strength and good rigidity. In the traditional multi-roller straightening machine, the roller opening adjustment depends on the arc adjustment block A (such as Fig. 9 ), the arc adjustment block is located at both ends of the bearing seat of the upper roller system. The arc adjustment block contacts the limit surface of the frame to adjust the swing amount of the upper swing beam and then adjust the opening degree of the roller system. After about three months of use, the adjustment accuracy of the equipment will become worse and worse, the accuracy and strength of the plate will be reduced, and the flatness of the plate cannot meet the requirements of product accuracy. Summary of the invention

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and to provide a precision multi-roller straightening machine with a press-down swing adjustment mechanism. The utility model has the characteristics of reasonable design, novel structure, good rigidity and high precision, which qualitatively improves the performance of the plate.

[0004] The technical scheme of the utility model is: a precision multi-roller straightening machine, a driving mechanism for driving the swing position of the upper swing beam is installed on the upper part of the frame, the lower roller is installed on the bottom of the frame, the upper roller is installed on the bottom of the upper swing beam, the driving mechanism includes a spiral elevator and a reduction motor connected to the spiral elevator; an adjustment device C is provided on the upper swing beam; the adjustment device C includes a slide groove and a slider provided on the upper swing beam; the slider is connected to the spiral elevator through a rotating shaft; an adjustment distance is reserved between the slider and the slide groove; and also includes two groups of adjustment devices D symmetrically arranged on the left and right sides of the frame in cooperation with the adjustment device C, each group of adjustment devices D includes a slide plate and two or more arc slide plates, and the slide plate is provided at At the sliding grooves on the left and right sides of the frame, the slide plate and the sliding grooves are matched with each other in clearance and can move up and down. More than two arc-shaped slide grooves are evenly arranged on the slide plate, and the arc slide plate and the arc slide grooves on the slide plate are symmetrically arranged one by one and matched with each other in clearance; when the upper swing beam swings, the arc slide plate can rotate freely along the arc-shaped slide grooves on the slide plate; the center of the circle where the arc-shaped slide grooves on each slide plate in the adjustment device D on the left is concentric with the center of the circle where the arc-shaped slide plate in the adjustment device D on the left is concentric; the center of the circle where the arc-shaped slide grooves on each slide plate in the adjustment device D on the left is on the same axis as the center of the circle where the arc-shaped slide grooves on each slide plate in the adjustment device D on the right are on the same axis and are located on the middle symmetry plane of the frame.

[0005] The sliding groove is a concave sliding groove, which is installed on both sides of the frame. The arc slide plate is evenly and symmetrically arranged on the upper swing beam. Three evenly and symmetrical arc slide grooves are arranged on the slide plate. The three arc slide grooves on the slide plate and the centers of the three arc slide plates are concentric on the same axis and are located on the middle symmetry plane of the frame.

[0006] The upper swing beam is a rectangular box structure, and four groups of adjustment devices C are set at the four corners of the upper swing beam; four screw elevators are installed on the frame; two reduction motors are installed on the frame; each reduction motor drives the screw elevator through two universal couplings.

[0007] The slider is provided with a groove for accommodating the head of the screw rod of the spiral elevator; the slider is pressed into the slide groove through the side cover plate and the upper cover plate, the upper and lower surfaces of the slider are matched with the bottom surface clearance of the slide groove of the upper cover plate and the upper swing beam, the left and right sides of the slider are matched with the side cover plate and the side clearance of the slide groove, and an adjustment distance is reserved between the horizontal sides of the slider and the slide groove.

[0008] The groove walls on both sides of the groove are provided with mounting holes, and the two ends of the rotating shaft are fixedly mounted at the mounting holes. The rotating shaft placed in the groove is covered with a copper sleeve, and the head of the screw rod of the screw jack is connected to the rotating shaft through the copper sleeve. The copper sleeve mainly serves as a protection to prevent the friction between steel and steel from causing fuzzing, adhesion and locking.

[0009] A straightening method, which determines the position of the upper roller system and the opening degree of the upper roller system of a precision multi-roller straightening machine according to the thickness of the steel strip to be straightened;

[0010] 1) Up and down adjustment:

[0011] Two reduction motors drive four spiral elevators at the same speed at the same time, driving four slide blocks to move up and down, driving the upper swing beam to move up and down, thereby driving the upper roller system to move up and down, completing the up and down lifting adjustment;

[0012] 2) Upper roller opening adjustment

[0013] The two reduction motors drive the spiral elevator at different speeds respectively. The pressing amount of the elevator on the inlet side and the outlet side is different, resulting in a height difference. Under the restriction of the slide plate and the arc slide plate, the upper swing beam always rotates around the fixed center of the circle. The adjustment device C compensates for the horizontal movement of the upper swing beam, and the adjustment device D compensates for the rotation angle and vertical movement of the upper swing beam to ensure that the upper roller system is always located on the middle symmetry plane of the frame, thereby completing the adjustment of the opening degree of the upper roller system.

[0014] 1) Up and down lifting adjustment and 2) upper roller opening adjustment: calculate the entry and exit pressure according to the thickness of the steel strip to be straightened, and calculate the pressure a and b of the elevators on both sides based on the entry and exit pressure. Two displacement sensors are installed on the screw elevator to detect the pressure of the screw elevator in real time. The reduction motor drives the screw elevator to move. When the displacement sensor detects that the pressure of the screw elevator is in place, the reduction motor brake is locked and stops rotating.

[0015] After straightening, the straightening quality is inspected by workers visually. If there is a problem, the straightening parameters are manually adjusted until the requirements are met.

[0016] The precision multi-roller straightening machine has a backlash elimination mechanism and a locking mechanism. The backlash elimination mechanism is composed of four oil cylinders, one end of which is installed on the frame and the other end is installed on the upper swing beam in the form of a hinge shaft. The oil cylinder always exerts an upward pulling force on the upper swing beam in the same direction as the straightening force. The locking mechanism is locked by the brake of the reduction motor. The brake is opened during adjustment and locked after the adjustment is completed.

[0017] The traditional multi-roller straightening machine has the defect of low straightening accuracy after being used for a period of time, but the cause of this defect is not clear. The inventor found through research that the spiral elevator uses a pin shaft to be directly installed on the upper swing beam. The reserved gap between the spiral elevator and the pin shaft is relatively large, generally 1 mm, and the gap between the screw rod and the nut is also relatively large, about 1 mm. The deflection displacement is compensated by the gap. On the one hand, there is an inaccuracy problem in the adjustment process, and on the other hand, the arc adjustment block and the frame limit surface are in line contact and are easy to wear; during the adjustment process, the swing amount of the upper swing beam is completely compensated by the gap of the spiral elevator screw rod, which is bound to cause deformation of the core components and abnormal external forces, and also aggravates the wear of the arc adjustment block, causing the core components of the multi-roller straightening machine to be easily damaged, and the roller system pressing force is uneven, which affects the improvement of the accuracy and strength of the plate, and the straightness of the plate cannot meet the needs of scientific and technological development.

[0018] Based on this, the utility model adopts a downward swing adjustment mechanism (i.e., the adjustment device C cooperates with the adjustment device D), which solves the drawbacks of the traditional multi-roller straightening machine roller opening adjustment, and improves the performance indicators of the multi-roller straightening machine such as accuracy, strength and rigidity. The screw elevator in the utility model has high accuracy, and the gap between the screw rod and the nut of the screw elevator can be within 5 threads, 1 thread = 0.01mm. The screw of the screw elevator in the utility model is not directly connected to the upper swing beam, and a slider is added, which can slide in the swing direction to compensate for the deflection displacement. In the screw elevator of the utility model, the gap between the screw and the nut can be reduced to 0.05mm, the gap between the rotating shaft and the slider is 0.02mm, and the slider 10 in the adjustment device C has a 20mm gap with the side cover plate 9 and the side of the slide groove 5-1. The slider has a 20mm adjustment distance reserved between the horizontal sides and the slide groove. The 20mm gap will not affect the straightening accuracy. The adjustment device C only positions the swing beam up and down, and the swing is positioned by the arc adjustment mechanism (i.e., the adjustment device D). Therefore, the lateral gap between the slider and the slide groove will not affect the accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the utility model;

[0020] Figure 2It is a side view of the utility model;

[0021] Figure 3 It is the AA cross-sectional view of the utility model;

[0022] Figure 4 It is the BB cross-sectional view of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the adjustment device C of the utility model;

[0024] Figure 6 It is a schematic diagram of the structure of the adjustment device D;

[0025] Figure 7 for Figure 2 A partial schematic diagram of

[0026] Figure 8 This is a working state diagram of the utility model;

[0027] Fig. 9 for Figure 8 A partial enlarged view of .

[0028] In the figure: 1. frame; 2. screw lift; 3. universal coupling; 4. reduction motor; 5. upper swing beam; 5-1. slideway; 6. upper roller system; 7. lower roller system; 8. upper cover plate; 9. side cover plate; 10. slider; 11. rotating shaft; 12. concave slideway; 13. slide plate; 13-1. arc slideway; 13-2. arc slideway; 13-3. arc slideway; 14. arc slide plate; C. adjustment device; D. adjustment device. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0030] like Figure 1-9 As shown, in the multi-roller straightening machine of the utility model, four screw elevators 2 are installed on the frame 1; two reduction motors 4 are installed on the frame 1; each reduction motor 4 drives the screw elevator 2 through two universal couplings 3.

[0031] The adjustment device C includes a slide groove 5-1, a slider 10, a side cover plate 9, and an upper cover plate 8 provided on the upper swing beam 5. The slider 10 is provided with a groove, and the slider 10 is connected to the four spiral elevators 2 through a rotating shaft 11; the upper and lower surfaces of the slider 10 are matched with the clearance between the upper cover plate 8 and the bottom surface of the slide groove 5-1 of the upper swing beam 5, and the left and right sides of the slider 10 are matched with the clearance between the side cover plate 9 and the side surface of the slide groove 5-1, and both horizontal sides of the slider 10 are reserved with an adjustment distance from the slide groove 5-1. There are four groups of the adjustment device C, which are respectively provided at the four corners of the upper swing beam 5.

[0032] The adjustment device D includes two groups of concave chutes 12, a slide plate 13, and three arc slide plates 14. The concave chutes 12 are installed on both sides of the frame 1, and the slide plate 13 can move up and down with clearance fit with the concave chutes 12. The arc slide plate 14 is evenly and symmetrically arranged on the upper swing beam 5. The slide plate 13 is provided with three evenly and symmetrical arc chutes 13-1, 13-2, and 13-3. The three arc chutes on the slide plate 13 and the three arc slide plates 14 are concentric and on the same axis, and are located on the middle symmetry plane of the frame 1. The arc slide plates 14 are symmetrically arranged one by one with the arc chutes on the slide plate 13, with clearance fit. When the upper swing beam 5 swings, the arc slide plates 14 can rotate freely along the arc chutes on the slide plate 13. Two groups of adjustment devices D are symmetrically arranged on both sides of the frame 1.

[0033] The lower roller system 7 is installed at the bottom of the frame 1; the upper roller system 6 is installed at the bottom of the upper swing beam 5.

[0034] Adjustment principle:

[0035] 1. Up and down adjustment:

[0036] The two reduction motors 4 simultaneously drive the four spiral elevators 2 to move up and down at the same speed, drive the four sliders 10 to move up and down, drive the upper swing beam 5 to move up and down, and thus drive the upper roller system 6 to move up and down, completing the up and down lifting adjustment.

[0037] 2. Adjustment of the opening degree of the upper roller system

[0038] The two reduction motors 4 drive the spiral elevator 2 at different speeds respectively. The pressing amount of the elevator 2 on the inlet side and the outlet side is different, forming a height difference. Under the restriction of the slide plate 13 and the arc slide plate 14, the upper swing beam 5 always rotates around the fixed center of the circle at an angle a, a=1°. The adjustment device C compensates for the horizontal movement of the upper swing beam 5, and the adjustment device D compensates for the rotation angle and vertical movement of the upper swing beam 5 to ensure that the upper roller system 6 is always located on the middle symmetry plane of the frame 1, thereby completing the adjustment of the opening degree of the upper roller system 6.

[0039] Take the straightening of 3.5mm thick steel plate as an example. According to the calculation of straightening 3.5mm thickness, the inlet pressure should be adjusted to 1mm, and the outlet pressure should be adjusted to -3.5mm. The pressure a and b of the elevators on both sides are calculated, and then the reduction motor drives the elevator to move. After the displacement sensor detects that it is in place, the motor brake is locked.

[0040] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A precision multi-roller straightening machine, characterized in that: A driving mechanism for driving the upper swing beam (5) to swing is mounted on the upper part of the frame (1), a lower roller system (7) is mounted on the bottom of the frame (1), and an upper roller system (6) is mounted on the bottom of the upper swing beam (5), the driving mechanism comprising a screw elevator (2) and a reduction motor (4) connected to the screw elevator; an adjustment device C is provided on the upper swing beam (5); The adjustment device C comprises a slide groove (5-1) and a slider (10) provided on the upper swing beam (5); the slider (10) is connected to the screw elevator (2) via a rotating shaft (11); an adjustment distance is reserved between the slider (10) and the slide groove (5-1); It also includes two groups of adjustment devices D that are symmetrically arranged on the left and right sides of the frame (1) in cooperation with the adjustment device C, each group of adjustment devices D includes a slide plate (13) and two or more arc slide plates (14), the slide plates (13) are arranged at the sliding grooves on the left and right sides of the frame (1), the slide plates (13) are clearance-matched with the sliding grooves and can move up and down, the slide plates (13) are evenly provided with two or more arc slide grooves, the arc slide plates (14) are symmetrically arranged one-to-one with the arc slide grooves on the slide plates (13) and clearance-matched; when the upper swing beam (5) swings, the arc slide plates (14) can freely rotate along the arc slide grooves on the slide plates (13); The center of the circle where the arc-shaped slide grooves on each slide plate (13) in the left adjustment device D are located is concentric with the center of the circle where the arc-shaped slide plate (14) in the left adjustment device D is located; the center of the circle where the arc-shaped slide grooves on each slide plate (13) in the left adjustment device D are located is on the same axis as the center of the circle where the arc-shaped slide grooves on each slide plate (13) in the right adjustment device D are located, and are located on the middle symmetry plane of the frame (1).

2. The precision multi-roller straightening machine according to claim 1, characterized in that: The sliding groove is a concave sliding groove (12), which is installed on both sides of the frame (1), and the arc sliding plate (14) is evenly and symmetrically arranged on the upper swing beam (5). The sliding plate (13) is provided with three evenly and symmetrical arc sliding grooves, and the three arc sliding grooves on the sliding plate (13) and the three arc sliding plates (14) are concentric and on the same axis, and are located on the middle symmetry plane of the frame (1).

3. The precision multi-roller straightening machine according to claim 1, characterized in that: The upper swing beam (5) is a rectangular box structure, and four groups of adjustment devices C are arranged at the four corners of the upper swing beam (5); four screw elevators (2) are mounted on the frame (1); two reduction motors (4) are mounted on the frame (1); and each reduction motor (4) drives the screw elevator (2) via two universal couplings (3).

4. The precision multi-roller straightening machine according to claim 1, characterized in that: The slider (10) is provided with a groove for accommodating the head of the screw rod of the screw elevator; the slider (10) is pressed into the slide groove (5-1) via the side cover plate (9) and the upper cover plate (8); the upper and lower surfaces of the slider (10) are in clearance with the bottom surfaces of the slide groove (5-1) of the upper cover plate (8) and the upper swing beam (5); the left and right sides of the slider (10) are in clearance with the side covers (9) and the side surfaces of the slide groove (5-1); and an adjustment distance is reserved between the slider (10) and the slide groove (5-1) on both horizontal sides.

5. The precision multi-roller straightening machine according to claim 4, characterized in that: The groove walls on both sides of the groove are provided with mounting holes, and the two ends of the rotating shaft (11) are fixedly mounted at the mounting holes. The rotating shaft (11) placed in the groove is covered with a copper sleeve (21), and the head of the screw rod of the spiral elevator is connected to the rotating shaft through the copper sleeve (21).

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