Automatic width adjusting device of steel strip slitting machine

Abstract

This invention discloses an automatic width-fixing adjustment device for a steel strip slitting machine, belonging to the field of metal processing technology. It includes a support frame, inside which four horizontally arranged sliding rods are uniformly fixed vertically. A set of adjusting seats is located in front of each sliding rod, and two bidirectional self-locking mechanisms are fixedly connected to the rear of each adjusting seat, with each bidirectional self-locking mechanism slidably connected to its corresponding sliding rod. A scissor-type linkage connecting mechanism is located inside each adjusting seat, with a hydraulic cylinder on the left side of the scissor-type linkage connecting mechanism, and the output end of the hydraulic cylinder connected to one end of the scissor-type linkage connecting mechanism. A slitting mechanism is installed above each adjusting seat. This invention provides a bidirectional self-locking mechanism on each adjusting seat, which uses symmetrically arranged wedge friction blocks and a bidirectional conical sleeve clamping ring in conjunction with a reset compression spring to achieve locking upon stopping and position maintenance without drift.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal processing, and particularly relates to an automatic width adjusting device of a steel strip slitting machine. BACKGROUND

[0002] The slitting machine is core process equipment for slitting and separating metal strip in the longitudinal direction, and the slitting width is directly determined by the axial spacing between adjacent disc shears. In actual production, in order to meet the diversified needs of different users for strip specifications, the slitting machine needs to frequently adjust the tool spacing to switch the product width, and therefore the width adjustment becomes a key link affecting the production efficiency and product quality.

[0003] At present, the width adjustment in the industry generally adopts a left and right screw nut pair structure, and the adjustment process relies on manual operation or ordinary reducer driving, and the tool arranging process is complicated and time-consuming. Especially in the downstream market trend of multi-variety and small-batch production mode, the product specifications are frequently switched, a large amount of auxiliary time is occupied, the effective working time of the equipment is greatly compressed, and the operation efficiency of the whole production line is seriously restricted. In addition, the automation degree of the existing adjustment mode is generally low, and the width setting and correction are highly dependent on the personal experience and manual skills of the operator, which not only leads to high labor intensity and high skill requirement for workers, but also lacks closed-loop feedback and automatic compensation mechanism, so that the repeatability of the adjustment result is poor, and when the same specification product is produced again, it is difficult to quickly recover to the previous accurate tool arranging state, and the product consistency control between batches is difficult.

[0004] Therefore, it is necessary to provide an automatic width adjusting device of a steel strip slitting machine to solve the problems in the background art. SUMMARY

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: an automatic width adjusting device of a steel strip slitting machine, which comprises a support frame, four slide rods arranged in a horizontal manner are fixed in the support frame in a vertical direction; a group of adjusting seats are arranged in front of each slide rod, two bidirectional self-locking mechanisms are respectively fixed at the rear of each adjusting seat, and the distance between the two bidirectional self-locking mechanisms on the same adjusting seat is equal to the center distance between two slide rods; the bidirectional self-locking mechanisms on two adjacent adjusting seats are arranged in a staggered manner in the vertical direction, and each bidirectional self-locking mechanism is in sliding connection with the corresponding slide rod.

[0006] A shear type connecting rod connecting mechanism is arranged in the interior of each adjusting seat, a hydraulic cylinder is arranged on the left side of the shear type connecting rod connecting mechanism, the hydraulic cylinder is fixedly installed on the support frame, and the output end of the hydraulic cylinder is connected with one end of the shear type connecting rod connecting mechanism; a slitting mechanism is arranged above each adjusting seat.

[0007] Further, as preferred, the scissors linkage connecting mechanism is composed of several groups of scissors linkage units, the scissors linkage unit comprises a first linkage, a second linkage, a center hinge shaft and an end hinge assembly; a first hinge hole is formed in the middle of the rod body of the first linkage, a second hinge hole is formed in the middle of the rod body of the second linkage, and the hole diameters of the first hinge hole and the second hinge hole are matched and coaxially aligned;

[0008] The center hinge shaft is inserted through the first hinge hole and the second hinge hole after alignment, and is fixedly connected with the corresponding adjusting seat; the first linkage and the second linkage form a cross-hinged scissors rotating structure through the center hinge shaft, and the first linkage and the second linkage can rotate relative to the center hinge shaft, thereby constituting a telescopic opening and closing scissors motion pair;

[0009] The two ends of the first linkage are respectively provided with a first end hinge hole and a second end hinge hole, and the two ends of the second linkage are respectively provided with a third end hinge hole and a fourth end hinge hole; the four end hinge holes are symmetrically distributed on both sides of the center hinge shaft in pairs; each end hinge hole is matched with the end hinge assembly.

[0010] Further, as preferred, a support plate is fixedly arranged at the front of the support frame, and the support plate penetrates the interior of each adjusting seat; an adjusting block is mounted at the middle position of the side close to the scissors linkage connecting mechanism of the support plate, and a sliding groove is symmetrically formed in the adjusting block in the vertical direction; two end hinge assemblies located on the same straight line in the vertical direction are respectively and slidingly fitted in the corresponding sliding grooves.

[0011] Further, as preferred, the longitudinal shearing mechanism comprises a longitudinal shearing frame fixedly arranged on the upper end surface of the adjusting seat, a motor is mounted on the front side of the longitudinal shearing frame, a disc shear is rotationally mounted on the left side of the longitudinal shearing frame, and the disc shear and the motor are drivingly connected through a belt transmission device.

[0012] Further, as preferred, the bidirectional self-locking mechanism comprises a sliding shell, two groups of inclined wedge friction blocks, two bidirectional tapered sleeve compression rings and a reset compression spring; the sliding shell is slidingly sleeved on the outer side of the sliding rod, and an axial limiting boss and an unlocking groove are symmetrically formed on the inner side wall of the sliding shell;

[0013] The reset compression spring is coaxially arranged at the inner middle position of the sliding shell and sleeved on the outer side of the sliding rod; the two ends of the reset compression spring are fixedly connected with one side of the two bidirectional tapered sleeve compression rings, and the two bidirectional tapered sleeve compression rings are symmetrically arranged at the two ends of the reset compression spring;

[0014] Two groups of the inclined wedge friction blocks are arranged on the sides of the bidirectional taper sleeve compression ring away from the reset compression spring, and the two groups of the inclined wedge friction blocks are symmetrically arranged left and right; one side end face of each inclined wedge friction block is in abutment with the taper surface of the bidirectional taper sleeve compression ring, and the other side of each inclined wedge friction block is hingedly connected with a sliding block; the sliding block is arranged in the interior of the sliding shell and is in sliding connection with the sliding shell.

[0015] Further, as preferred, each group of the inclined wedge friction blocks is composed of a plurality of inclined wedge friction blocks that are circumferentially symmetrically distributed and symmetrically arranged with the center axis of the bidirectional taper sleeve compression ring as the reference, the inclined surface, the inclined angle and the outer dimensions of each inclined wedge friction block are consistent;

[0016] The inner side arc fitting surface of each inclined wedge friction block is in a high-precision fitting structure with the outer circular surface of the sliding rod; the outer side inclined surface of each inclined wedge friction block is matched with the unlocking groove of the sliding shell, and provides a radial retreat space for each inclined wedge friction block in the unlocking process.

[0017] Further, as preferred, the bidirectional taper sleeve compression ring is of a bidirectional taper surface structure, the left and right sides of the bidirectional taper sleeve compression ring are both provided with a taper surface matched with the outer side inclined surface of the inclined wedge friction block, two bidirectional taper sleeve compression rings are clamped between the two groups of inclined wedge friction blocks and axially limited in cooperation with the axial limiting boss of the sliding shell;

[0018] The axial limiting boss is in abutment limiting with the taper surface of the bidirectional taper sleeve compression ring, and can synchronously transmit bidirectional axial driving force, so as to realize the synchronous axial displacement of the bidirectional taper sleeve compression ring and the sliding shell.

[0019] Further, as preferred, the reset compression spring is a constant elastic force compression spring, which is kept in a pre-compressed state under normal conditions, continuously provides axial reset pre-tightening force for the two bidirectional taper sleeve compression rings, and can instantaneously drive the two bidirectional taper sleeve compression rings to axially reset after the external force is removed.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] The application adopts a driving mode of cooperation of a hydraulic cylinder and a shear type connecting rod connecting mechanism, converts single-point linear driving force output by the hydraulic cylinder into synchronous stretching and contracting movement uniformly distributed along the vertical direction through series connection of a plurality of groups of shear type connecting rod units, and drives synchronous sliding of each adjusting seat along a slide rod.

[0022] The application sets a bidirectional self-locking mechanism on each adjusting seat, which adopts a structure of cooperation of symmetrically arranged inclined wedge friction blocks and bidirectional taper sleeve compression rings with return compression springs, can be smoothly unlocked to realize free sliding under the action of driving external force, and after instant withdrawal of the driving external force, the return compression springs release elastic potential energy, push the bidirectional taper sleeve compression rings to reset, the taper surfaces of the bidirectional taper sleeve compression rings simultaneously extrude two groups of inclined wedge friction blocks to clamp radially inward, the inner side circular arc abutting surfaces are tightly held on the outer circular surface of the slide rod, large-area static friction self-locking force is generated, position keeping of stopping and locking simultaneously and without drifting is realized. Meanwhile, the mechanism adopts completely symmetric structure design, whether pushing leftward or pulling rightward, the unlocking sliding feeling is consistent, one-way locking or jamming does not occur, reliable fixation of each adjusting seat at any stop position is ensured, and the adjusting seat does not produce hunting due to vibration or shearing reaction force, the dimensional stability and long-term reliability of the longitudinal shearing operation are significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the application;

[0024] Figure 2 It is a rear structure schematic diagram of the overall structure of the application;

[0025] Figure 3 It is a structure schematic diagram of the shear type connecting rod connecting mechanism in the application;

[0026] Figure 4 It is an internal structure schematic diagram of the bidirectional self-locking mechanism in the application;

[0027] In the diagram: 1. Support frame; 2. Slide rod; 3. Adjusting seat; 4. Two-way self-locking mechanism; 41. Sliding housing; 411. Limiting boss; 412. Unlocking groove; 42. Wedge friction block; 43. Two-way conical sleeve clamping ring; 44. Return compression spring; 45. Slider; 5. Scissor linkage connection mechanism; 6. Hydraulic cylinder; 7. Sliding mechanism; 71. Sliding frame; 72. Motor; 73. Disc shears; 74. Belt drive device; 8. Scissor linkage unit; 81. First link; 82. Second link; 83. Central hinge shaft; 84. End hinge assembly; 9. Support plate; 10. Adjusting block; 101. Slide groove. Detailed Implementation

[0028] Please see Figures 1-4 In this embodiment of the invention, an automatic width-fixing adjustment device for a steel strip slitting machine includes a support frame 1. Four horizontally arranged sliding rods 2 are uniformly fixed vertically inside the support frame 1. A set of adjustment seats 3 is arranged in front of each sliding rod 2. Two bidirectional self-locking mechanisms 4 are fixedly connected to the rear of each adjustment seat 3. The distance between the two bidirectional self-locking mechanisms 4 on the same adjustment seat 3 is equal to the center distance between two sliding rods 2. The bidirectional self-locking mechanisms 4 on adjacent adjustment seats 3 are staggered vertically, and each bidirectional self-locking mechanism 4 is slidably connected to its corresponding sliding rod 2.

[0029] Each adjusting seat 3 is equipped with a scissor linkage connecting mechanism 5 inside. A hydraulic cylinder 6 is provided on the left side of the scissor linkage connecting mechanism 5. The hydraulic cylinder 6 is fixedly installed on the support frame 1, and the output end of the hydraulic cylinder 6 is connected to one end of the scissor linkage connecting mechanism 5. A longitudinal shearing mechanism 7 is installed on the top of each adjusting seat 3.

[0030] After the automatic width adjustment device is activated, the hydraulic cylinder 6, which is fixedly installed on the left side of the support frame 1, begins to operate. Its piston rod extends or retracts, directly driving the scissor linkage mechanism 5 fixed to it. The scissor linkage mechanism 5 expands or retracts in the vertical plane, and each hinge point sequentially transmits the displacement to each set of adjustment seats 3. Since each adjustment seat 3 is slidably engaged with the corresponding slide rod 2 through the rear bidirectional self-locking mechanism 4, and the bidirectional self-locking mechanisms 4 on adjacent adjustment seats 3 are staggered in the vertical direction, the extension and retraction movement of the scissor linkage mechanism 5 can drive all adjustment seats 3 to slide synchronously along the four evenly distributed slide rods 2.

[0031] During the sliding process, the longitudinal shearing mechanism 7 above each adjusting seat 3 moves together with the adjusting seat 3, thereby changing the lateral spacing between each longitudinal shearing mechanism 7, thus realizing the dynamic adjustment of the shearing width. When the hydraulic cylinder 6 stops driving, the scissor linkage connecting mechanism 5 maintains the current elongation, while the two bidirectional self-locking mechanisms 4 on each adjusting seat 3 automatically lock due to the disappearance of external force, generating bidirectional anti-slip resistance, so that the adjusting seat 3 can be reliably fixed at any stopping position and will not move due to vibration or shear reaction force.

[0032] Throughout the adjustment process, since the distance between the two bidirectional self-locking mechanisms 4 on the same adjusting seat 3 is equal to the center distance between two sliding rods 2, and the bidirectional self-locking mechanisms 4 of adjacent adjusting seats 3 are staggered vertically, it ensures that each adjusting seat 3 is subjected to balanced force and smooth sliding, while avoiding interference in the movement of the mechanisms. Finally, through the precise stroke control of the hydraulic cylinder 6 and the proportional displacement transmission of the scissor linkage connecting mechanism 5, combined with the instantaneous locking of the bidirectional self-locking mechanism 4, the spacing of all longitudinal shearing mechanisms 7 is quickly, synchronously, and with high precision positioned, completing the stable and reliable adjustment of the longitudinal shearing width of the steel strip.

[0033] In this embodiment, the scissor linkage connection mechanism 5 is composed of several sets of scissor linkage units 8. The scissor linkage unit 8 includes a first link 81, a second link 82, a central hinge shaft 83, and an end hinge assembly 84. The first link 81 has a first hinge hole (not shown in the figure) in the middle of its body, and the second link 82 has a second hinge hole (not shown in the figure) in the middle of its body. The diameters of the first hinge hole and the second hinge hole are matched and they are coaxially aligned.

[0034] The central hinge shaft 83 is inserted through the aligned first hinge hole and second hinge hole, and is fixedly connected to the corresponding adjusting seat 3; the first connecting rod 81 and the second connecting rod 82 form a cross-hinged scissor rotation structure through the central hinge shaft 83. The first connecting rod 81 and the second connecting rod 82 can rotate relative to each other around the central hinge shaft 83, forming a telescopic scissor motion pair.

[0035] The first connecting rod 81 is provided with a first end hinge hole (not shown in the figure) and a second end hinge hole (not shown in the figure) at both ends respectively. The second connecting rod 82 is provided with a third end hinge hole (not shown in the figure) and a fourth end hinge hole (not shown in the figure) at both ends respectively. The four end hinge holes are symmetrically distributed on both sides of the central hinge shaft 83 in pairs. Each end hinge hole is matched with an end hinge assembly 84.

[0036] After the scissor linkage mechanism 5 is activated, the linear driving force output by the hydraulic cylinder 6 is first transmitted to the end hinge assembly 84 of the scissor linkage unit 8 at the beginning of the tandem chain. This thrust or pull force acts on the corresponding ends of the first link 81 and the second link 82 through the end hinge holes, forcing them to rotate relative to each other in opposite directions around the central hinge axis 83. Since the two links form a cross-hinged scissor motion pair through the central hinge axis 83, the included angle between the two links changes under the action of force: when the hydraulic cylinder pushes the end hinge assembly 84 toward the center, the included angle between the two links increases, and the unit as a whole shortens in the horizontal direction; conversely, when the hydraulic cylinder pulls back the end hinge assembly 84, the included angle between the two links decreases, and the unit as a whole lengthens in the horizontal direction. Thus, a single scissor unit achieves reversible telescopic opening and closing motion.

[0037] While a single unit is stretching and deforming, the hinge assembly 84 at its other end precisely transmits the displacement and force to the end of the next adjacent scissor link unit 8 through the corresponding end hinge hole. In this way, the driving force is transmitted step by step from near to far, so that all scissor link units 8 produce the same trend of angle change in sequence, thereby forming the synchronous linkage stretching and contraction of the entire series kinematic chain.

[0038] Since each central hinge shaft 83 is fixedly connected to its corresponding adjusting seat 3, the horizontal displacement of the central hinge shaft 83 is directly converted into the sliding stroke of the adjusting seat 3 along the slide bar 2. Furthermore, because all scissor linkage units 8 have identical structural dimensions, and the end hinge components 84 of each unit are connected in series, the horizontal displacement generated by each central hinge shaft 83 during the linkage extension and retraction process is equal to that of the others. This ensures that all adjusting seats 3 slide synchronously and equidistantly on the four evenly distributed slide bars 2. Finally, the lateral spacing between the longitudinal shearing mechanisms 7 installed above each adjusting seat 3 is uniformly adjusted, completing the synchronous change of the steel strip shearing width.

[0039] In a preferred embodiment, a support plate 9 is fixedly provided in front of the support frame 1, and the support plate 9 passes through the interior of each adjustment seat 3; an adjustment block 10 is installed in the middle position of the support plate 9 near the scissor linkage connecting mechanism 5, and a sliding groove 101 is symmetrically opened on the adjustment block 10 along the vertical direction; two end hinge components 84 located on the same straight line along the vertical direction are respectively slidably engaged in the corresponding sliding groove 101.

[0040] The end hinge assembly 84 in the middle position slides vertically along the slide groove 101 on the adjusting block 10. Since the slide groove 101 is symmetrically opened in the vertical direction and has consistent dimensional accuracy, the sliding guide mechanism effectively constrains the offset degree of freedom of the end hinge point, ensuring that each hinge point moves only along the set vertical trajectory, avoiding lateral movement or swaying caused by the rotation of the connecting rod.

[0041] In this embodiment, the slitting mechanism 7 includes a slitting frame 71 fixedly mounted on the upper surface of the adjusting seat 3. A motor 72 is mounted on the front side of the slitting frame 71, and a disc shear 73 is rotatably mounted on the left side of the slitting frame 71. The disc shear 73 and the motor 72 are connected by a belt drive device 74.

[0042] When the motor 72 on the front side of the slitting frame 71 is powered on, the output power is transmitted to the rotating disc shears 73 on the left side via the belt drive device 74, driving them to rotate at high speed. As the steel strip moves forward continuously, the disc shears 73 of multiple slitting mechanisms 7 rotate simultaneously, longitudinally slitting the steel strip according to the pre-set interval, cutting the wide steel strip into multiple narrow steel strips of the required width in one go.

[0043] In this embodiment, the bidirectional self-locking mechanism 4 includes a sliding outer shell 41, two sets of inclined wedge friction blocks 42, two bidirectional conical sleeve clamping rings 43 and a reset compression spring 44; the sliding outer shell 41 is slidably sleeved on the outside of the slide rod 2, and the inner sidewall of the sliding outer shell 41 is symmetrically provided with axial limiting bosses 411 and unlocking grooves 412.

[0044] The reset compression spring 44 is coaxially disposed in the middle of the interior of the sliding housing 41 and sleeved on the outside of the slide rod 2; the two ends of the reset compression spring 44 are respectively fixedly connected to one side of the two bidirectional conical sleeve clamping rings 43, and the two bidirectional conical sleeve clamping rings 43 are symmetrically arranged at both ends of the reset compression spring 44.

[0045] Two sets of wedge friction blocks 42 are respectively disposed on the side of each bidirectional conical sleeve clamping ring 43 away from the reset compression spring 44, and the two sets of wedge friction blocks 42 are arranged symmetrically from left to right; one end face of each wedge friction block 42 abuts against the conical surface of the bidirectional conical sleeve clamping ring 43, and a slider 45 is hinged to the other side of each wedge friction block 42; the slider 45 is disposed inside the sliding housing 41 and is slidably connected to the sliding housing 41.

[0046] 1. Initial Locking State

[0047] Under normal conditions without external force, the return compression spring 44 remains in a pre-compressed state, and its elastic force pushes the two bidirectional conical sleeve clamping rings 43 to apply pressure to both sides along the axial direction; the conical surfaces of the two bidirectional conical sleeve clamping rings 43 respectively press against the outer inclined surfaces of the corresponding wedge friction blocks 42, forcing each wedge friction block 42 to move radially inward, so that its inner arc contact surface tightly hugs the outer circular surface of the slide rod 2, generating sufficient static friction self-locking force, thereby locking the sliding housing 41 in the current axial position without slippage or movement.

[0048] 2. Apply axial external force (unlock sliding)

[0049] When an axial force is applied to the sliding housing 41 to the left or right, the sliding housing 41 begins to move axially relative to the slide rod 2. The axial limiting boss 411 inside then pushes the corresponding bidirectional conical sleeve clamping ring 43 to move in the same direction. The bidirectional conical sleeve clamping ring 43 then compresses the reset compression spring 44, allowing the reset compression spring 44 to further store energy. As the bidirectional conical sleeve clamping ring 43 moves axially, the conical surface on the same side gradually separates from the outer inclined surface of the corresponding wedge friction block 42, releasing the radial squeezing force on the wedge friction block 42. At the same time, the opposite wedge friction block 42 opens outward under the thrust of the sliding housing 41 with the help of the radial clearance space provided by the unlocking groove 412, forming a gap between its inner arc surface and the outer circular surface of the slide rod 2, and the clamping friction force completely disappears. At this time, the bidirectional self-locking mechanism 4 can slide freely axially along the slide rod 2 without jamming until it reaches the desired position.

[0050] It should be noted that regardless of whether the external force is pushed to the left or pulled to the right, the unlocking process and sliding feel are consistent due to the completely symmetrical structural design of the mechanism, and there will be no one-way locking or jamming.

[0051] 3. External force cancellation (instant self-locking)

[0052] When the axial external force applied to the sliding housing 41 is instantly removed, the elastic potential energy stored in the reset compression spring 44 is immediately released, pushing the two bidirectional conical sleeve clamping rings 43 to reset to their axial positions on both sides. The conical surfaces of the bidirectional conical sleeve clamping rings 43 simultaneously press the outer inclined surfaces of the wedge friction blocks 42 on both sides, forcing each wedge friction block 42 to move radially inward. Its inner arc surface is tightly attached to the outer circular surface of the slide rod 2 again, generating a strong static friction self-locking force, thereby instantly locking the sliding housing 41 at the axial position when the external force disappears, achieving drift-free locking upon stopping.

[0053] 4. Cyclic operation

[0054] When the position needs to be adjusted again, simply apply an axial external force to the left or right to repeat the above unlock-slide-lock cycle, thereby achieving bidirectional, repeatable, and precise position adjustment and locking.

[0055] In a preferred embodiment, each set of wedge friction blocks 42 is composed of multiple wedge friction blocks 42 arranged symmetrically around a circumference, and all are symmetrically arranged with the central axis of the bidirectional conical sleeve clamping ring 43 as the reference. The inclination angle and external dimensions of the inclined surface of each wedge friction block 42 are consistent, which can ensure that the radial clamping force borne by each wedge friction block 42 is evenly distributed in the locked state, avoiding local wear or locking deviation caused by uneven force, thereby effectively improving the consistency and repeatability of the locking position.

[0056] The inner arc-shaped contact surface of each wedge friction block 42 adopts a high-precision fitting structure with the outer circular surface of the slide rod 2. In the locked state, the arc-shaped contact surface can achieve full-area tight contact with the outer wall of the slide rod 2, forming a large-area static friction contact pair, thereby significantly enhancing the self-locking reliability and ensuring no relative slippage or axial movement after locking. The outer inclined surface of each wedge friction block 42 cooperates with the unlocking groove 412 of the sliding shell 41, providing radial clearance space for each wedge friction block 42 during the unlocking process, so that each wedge friction block 42 can open outward smoothly, avoiding interference or jamming, and ensuring the sensitivity and reliability of the unlocking action.

[0057] The working logic of the bidirectional self-locking mechanism 4 can be summarized as a follow-up response mechanism of "releasing when needed and locking when in position": when the adjusting seat 3 is in a stationary state, the preload of the reset compression spring 44 causes the wedge friction block 42 to be radially pressed against the surface of the slide rod 2, and the static friction force generated achieves bidirectional self-locking, ensuring that the adjusting seat 3 can be reliably fixed in any position;

[0058] When the width needs to be adjusted, the driving force output by the hydraulic cylinder 6 is transmitted to the adjusting seat 3 through the scissor linkage mechanism 5. When the external force is greater than the spring preload, the sliding housing 41 generates axial displacement. The wedge friction block 42 opens outward under the thrust of the sliding housing 41 with the help of the radial clearance space provided by the unlocking groove 412, releasing the self-locking. The adjusting seat 3 can then slide smoothly to complete the width adjustment.

[0059] When the adjusting seat 3 reaches the target position and the external force disappears or is less than the spring preload, the reset compression spring 44 pushes the bidirectional tapered sleeve clamping ring 43 to reset in the opposite direction. The tapered surface of the bidirectional tapered sleeve clamping ring 43 presses the outer inclined surface of the wedge friction blocks 42 on both sides at the same time, forcing each wedge friction block 42 to move radially inward. Its inner arc surface is tightly attached to the outer circular surface of the slide rod 2 again, and the self-locking function is quickly restored.

[0060] The core function of this mechanism is to enable automatic and reliable switching between the "unlocked movement" and "locked holding" states of the adjusting seat. This ensures both the flexibility and smoothness of the fixed width adjustment and the effective resistance to shearing impact and vibration interference, preventing the adjusting seat from shifting or deviating. As a result, it provides long-term stable dimensional accuracy for the slitting mechanism, significantly improving the reliability of equipment operation and the consistency of products.

[0061] In this embodiment, the bidirectional conical sleeve clamping ring 43 has a bidirectional conical surface structure. Both its left and right sides are provided with conical surfaces that match the inclined surface on the outer side of the wedge friction block 42. The two bidirectional conical sleeve clamping rings 43 are locked between the two sets of wedge friction blocks 42 and are axially limited to the sliding housing 41.

[0062] The axial limiting boss 411 fits and limits the conical surface of the bidirectional conical sleeve clamping ring 43, which can synchronously transmit bidirectional axial driving force, so that the bidirectional conical sleeve clamping ring 43 and the sliding housing 41 are synchronously displaced axially, thereby ensuring that the actions of each conical surface and the corresponding inclined wedge friction block 42 are coordinated and consistent during the unlocking and locking process, and avoiding uneven load or jamming caused by asynchrony.

[0063] In a preferred embodiment, the reset compression spring 44 is a constant elasticity compression spring, which is in a pre-compressed state under normal conditions and continuously provides axial reset pre-tightening force to the two bidirectional conical sleeve clamping rings 43. After the external force is removed, it can instantly drive the two bidirectional conical sleeve clamping rings 43 to reset in opposite directions along the axial direction.

[0064] Specifically,

[0065] 1. Initial state

[0066] When adjustment is not initiated, hydraulic cylinder 6 remains stationary, and scissor linkage mechanism 5 maintains the current extension / retraction amount. Each adjustment seat 3 is locked and fixed to the corresponding slide rod 2 via a bidirectional self-locking mechanism 4 fixed behind it. At this time, the reset compression spring 44 in each bidirectional self-locking mechanism 4 is in a pre-compressed state, pushing the conical surface of the bidirectional conical sleeve clamping ring 43 to press against the inclined wedge friction block 42, so that its inner arc contact surface tightly hugs the outer circular surface of the slide rod 2, generating static friction self-locking force, ensuring that each adjustment seat 3 and the longitudinal shear mechanism 7 installed above it are in a stable position without any movement.

[0067] 2. Width adjustment process

[0068] When it is necessary to change the slitting width of the steel strip, the control system sends an action command to the hydraulic cylinder 6. The hydraulic cylinder 6 starts, and its piston rod extends or retracts, outputting a linear driving force to the first end of the scissor linkage connecting mechanism 5 fixed thereto. This driving force is transmitted step by step through the end hinge assembly 84 of each scissor linkage unit 8, causing each first link 81 and second link 82 to rotate relative to each other around the central hinge axis 83. The included angle of each scissor linkage unit 8 changes synchronously, and the entire series kinematic chain achieves synchronous extension and retraction.

[0069] Since each central hinge shaft 83 is fixedly connected to the corresponding adjusting seat 3, the horizontal displacement of the central hinge shaft 83 is directly converted into the sliding stroke of the adjusting seat 3 along the slide rod 2. Each adjusting seat 3 is subjected to an axial driving force. This external force pushes the corresponding bidirectional conical sleeve clamping ring 43 to compress and reset the compression spring 44 through the axial limiting boss 411 inside the sliding housing 41, so that the conical surface on the same side disengages from the wedge friction block 42, releasing the radial compression. The opposite wedge friction block 42 opens outward with the help of the radial clearance space provided by the unlocking groove 412, forming a gap with the slide rod 2, and the clamping friction disappears. Each adjusting seat 3 then slides synchronously along the corresponding slide rod 2.

[0070] At the same time, the longitudinal shearing mechanism 7 above each adjusting seat 3 moves together with the adjusting seat 3, and the lateral spacing between each disc shear 73 is adjusted synchronously to the target width.

[0071] 3. Locking and positioning

[0072] When each adjusting seat 3 slides to the target position, the hydraulic cylinder 6 stops driving, and the axial external force applied to the sliding housing 41 of each bidirectional self-locking mechanism 4 is instantly removed; the elastic potential energy stored in the reset compression spring 44 is immediately released, pushing the two bidirectional conical sleeve clamping rings 43 to reset axially to both sides. Their conical surfaces simultaneously press against the outer inclined surfaces of the two sets of wedge friction blocks 42, forcing each wedge friction block 42 to move radially inward. Its inner arc contact surface tightly grips the outer circular surface of the slide rod 2 again, generating static friction self-locking force, instantly locking each adjusting seat 3 in the current position. At this time, even if subjected to vibration or shear reaction force, the adjusting seat 3 will not slip or move, achieving precise position holding without drift.

[0073] 4. Longitudinal shearing operation

[0074] After each adjusting seat 3 is positioned and locked, the motor 72 of the longitudinal shearing mechanism 7 is powered on and started, and the output power is transmitted to the disc shears 73 via the belt drive device 74, driving them to rotate at high speed. As the steel strip moves forward continuously, multiple sets of disc shears 73 rotate simultaneously, performing longitudinal slitting shearing on the steel strip according to the pre-set intervals, cutting the wide steel strip into multiple narrow steel strips of the required width in one go.

[0075] 5. Readjust and cycle

[0076] When it is necessary to change the steel strip specification or adjust the shearing width, the hydraulic cylinder 6 is restarted, and its piston rod moves in the opposite direction, driving the scissor linkage connecting mechanism 5 to extend and retract; each bidirectional self-locking mechanism 4 is unlocked synchronously under the action of external force, and each adjusting seat 3 slides back along the slide rod 2 to the new target position. After the external force is removed, it automatically locks again; this cycle can achieve bidirectional, fast, synchronous and high-precision repeated width adjustment to meet the longitudinal shearing processing needs of steel strips of different specifications.

[0077] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic width-adjusting device for a steel strip slitting machine, characterized in that: It includes a support frame (1), inside which four horizontally arranged sliding rods (2) are uniformly fixed vertically; a set of adjustment seats (3) is provided in front of each sliding rod (2), and two bidirectional self-locking mechanisms (4) are fixedly connected to the rear of each adjustment seat (3), and the distance between the two bidirectional self-locking mechanisms (4) on the same adjustment seat (3) is equal to the center distance between two sliding rods (2); the bidirectional self-locking mechanisms (4) on two adjacent adjustment seats (3) are staggered in the vertical direction, and each bidirectional self-locking mechanism (4) is slidably connected to the corresponding sliding rod (2); Each of the adjustment seats (3) is provided with a scissor linkage connection mechanism (5). A hydraulic cylinder (6) is provided on the left side of the scissor linkage connection mechanism (5). The hydraulic cylinder (6) is fixedly installed on the support frame (1), and the output end of the hydraulic cylinder (6) is connected to one end of the scissor linkage connection mechanism (5). A longitudinal shearing mechanism (7) is installed on the top of each of the adjustment seats (3).

2. The automatic width adjustment device for a steel strip slitting machine according to claim 1, characterized in that: The scissor linkage connection mechanism (5) is composed of several sets of scissor linkage units (8). The scissor linkage unit (8) includes a first link (81), a second link (82), a central hinge shaft (83), and an end hinge assembly (84). The first link (81) has a first hinge hole in the middle of its body, and the second link (82) has a second hinge hole in the middle of its body. The diameters of the first hinge hole and the second hinge hole are matched and they are coaxially aligned. The central hinge shaft (83) is inserted through the aligned first hinge hole and second hinge hole, and is fixedly connected to the corresponding adjustment seat (3); the first connecting rod (81) and the second connecting rod (82) form a cross-hinged scissor rotation structure through the central hinge shaft (83), and the first connecting rod (81) and the second connecting rod (82) can rotate relative to each other around the central hinge shaft (83) to form a telescopic scissor motion pair; The first connecting rod (81) is provided with a first end hinge hole and a second end hinge hole at its two ends respectively, and the second connecting rod (82) is provided with a third end hinge hole and a fourth end hinge hole at its two ends respectively. The four end hinge holes are symmetrically distributed on both sides of the central hinge shaft (83) in pairs; each end hinge hole is matched with the end hinge assembly (84).

3. The automatic width adjustment device for a steel strip slitting machine according to claim 2, characterized in that: A support plate (9) is fixedly provided in front of the support frame (1), and the support plate (9) passes through the interior of each of the adjustment seats (3); an adjustment block (10) is installed in the middle position of the support plate (9) near the side of the scissor linkage connecting mechanism (5), and a sliding groove (101) is symmetrically opened on the adjustment block (10) along the vertical direction; two end hinge components (84) located on the same straight line along the vertical direction are respectively slidably fitted in the corresponding sliding groove (101).

4. The automatic width adjustment device for a steel strip slitting machine according to claim 3, characterized in that: The slitting mechanism (7) includes a slitting frame (71) fixedly mounted on the upper surface of the adjusting seat (3). A motor (72) is installed on the front side of the slitting frame (71), and a disc shear (73) is rotatably mounted on the left side of the slitting frame (71). The disc shear (73) and the motor (72) are connected by a belt drive device (74).

5. The automatic width adjustment device for a steel strip slitting machine according to claim 1, characterized in that: The bidirectional self-locking mechanism (4) includes a sliding housing (41), two sets of inclined wedge friction blocks (42), two bidirectional conical sleeve clamping rings (43), and a reset compression spring (44); the sliding housing (41) is slidably sleeved on the outside of the slide rod (2), and the inner sidewall of the sliding housing (41) is symmetrically provided with axial limiting bosses (411) and unlocking grooves (412). The reset compression spring (44) is coaxially disposed in the middle of the interior of the sliding housing (41) and sleeved on the outside of the slide rod (2); the two ends of the reset compression spring (44) are respectively fixedly connected to one side of the two bidirectional conical sleeve clamping rings (43), and the two bidirectional conical sleeve clamping rings (43) are symmetrically arranged at both ends of the reset compression spring (44). Two sets of the wedge friction blocks (42) are respectively disposed on the side away from the reset compression spring (44) of each bidirectional conical sleeve clamping ring (43), and the two sets of wedge friction blocks (42) are arranged symmetrically from left to right; one end face of each wedge friction block (42) abuts against the conical surface of the bidirectional conical sleeve clamping ring (43), and a slider (45) is hinged to the other side of each wedge friction block (42); the slider (45) is disposed inside the sliding housing (41) and is slidably connected to the sliding housing (41).

6. The automatic width adjustment device for a steel strip slitting machine according to claim 5, characterized in that: Each set of the inclined wedge friction blocks (42) consists of multiple inclined wedge friction blocks (42) arranged symmetrically in a circle, and all of them are symmetrically arranged with the central axis of the bidirectional conical sleeve clamping ring (43) as the reference. The inclined surface, inclination angle and external dimensions of each inclined wedge friction block (42) are consistent. The inner arc-shaped contact surface of each of the wedge friction blocks (42) and the outer circular surface of the slide rod (2) adopt a high-precision fitting structure; the outer inclined surface of each of the wedge friction blocks (42) cooperates with the unlocking groove (412) of the sliding shell (41), providing radial clearance space for each of the wedge friction blocks (42) during the unlocking process.

7. The automatic width adjustment device for a steel strip slitting machine according to claim 6, characterized in that: The bidirectional conical sleeve clamping ring (43) is a bidirectional conical surface structure. Both its left and right sides are provided with conical surfaces that match the inclined surface on the outside of the inclined wedge friction block (42). The two bidirectional conical sleeve clamping rings (43) are locked between the two sets of inclined wedge friction blocks (42) and are axially limited to the sliding housing (41). The axial limiting boss (411) fits and limits the conical surface of the bidirectional conical sleeve clamping ring (43), and can synchronously transmit bidirectional axial driving force, so that the bidirectional conical sleeve clamping ring (43) and the sliding shell (41) can synchronously axially displace.

8. The automatic width adjustment device for a steel strip slitting machine according to claim 7, characterized in that: The reset compression spring (44) is a constant elastic force compression spring. Under normal conditions, it maintains a pre-compression state and continuously provides axial reset pre-tightening force to the two bidirectional conical sleeve clamping rings (43). After the external force is removed, it can instantly drive the two bidirectional conical sleeve clamping rings (43) to reset in opposite directions along the axial direction.

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