A billet continuous casting machine hydraulic shear stroke precision control device

Abstract

This utility model relates to the field of steel metallurgical equipment technology, specifically disclosing a precise control device for the stroke of a hydraulic shear in a billet continuous casting machine. It includes a limiting component located on the upper shear blade seat and a triggering component located on the lower shear blade seat. The limiting component includes a first fixed plate, a limiting body, and a contact head. The first fixed plate is fixedly connected to the upper shear blade seat, the limiting body is mounted on the fixed plate and has an internal mounting cavity, and the contact head is slidably located within the mounting cavity and connected to the hydraulic shear control circuit via an electrical wire. This 45° suspended hydraulic shear limiting device has a simple structure, low cost, and is easy to manufacture. It can operate stably in harsh environments. The contact head relies on self-realignment to ensure reliable signal transmission and effectively avoids fatigue fracture of the piston rod fixing bolts caused by excessive shear stroke of the hydraulic cylinder, extending the service life of the hydraulic cylinder, reducing the frequency of spare parts replacement, saving costs, and reducing the labor intensity of employees.

Description

Technical Field

[0001] This utility model relates to the field of steel metallurgical equipment technology, and specifically discloses a precise control device for the hydraulic shear stroke of a billet continuous casting machine. Background Technology

[0002] In the continuous casting process of steel, billet cutting is a key step in ensuring production continuity and product quality. Currently, billet continuous casting machines generally use 45° suspended hydraulic shears for billet cutting. This technology has advantages such as fast cutting speed, no chip generation, and no metal loss from the kerf. It can effectively avoid the problem of molten slag adhering to the bottom of the billet, and significantly improve cutting efficiency and accuracy.

[0003] However, in actual production processes, existing hydraulic shear systems have the following technical defects:

[0004] 1. Excessive shearing stroke: To ensure that the steel billet is completely cut, the shearing time of the hydraulic shear is usually set to 13 seconds and the piston retraction time is 7 seconds. This large stroke shearing causes the cylinder piston rod to be subjected to continuous fatigue stress. In particular, the fixing bolts break due to long-term reciprocating force, which in turn causes the piston rod to loosen, ultimately causing the hydraulic shear to malfunction.

[0005] 2. High equipment maintenance costs: Due to frequent breakage of piston rod fixing bolts, it is necessary to replace the oil cylinder and related spare parts frequently, which not only increases spare parts costs but also leads to extended equipment downtime and affects production efficiency.

[0006] 3. The manual labor intensity is high, and maintenance personnel need to frequently inspect and replace damaged parts, which increases their workload and poses certain safety hazards.

[0007] Currently, no effective technical solution has been proposed in the industry to address the above problems.

[0008] Therefore, there is an urgent need for a limiting device that can precisely control the shearing stroke of hydraulic shears in order to reduce fatigue damage to the cylinder and bolts, extend the service life of the equipment, reduce maintenance costs, and improve production efficiency. Utility Model Content

[0009] This utility model proposes a precise control device for the hydraulic shear stroke of a billet continuous casting machine. By precisely controlling the shear stroke of the hydraulic shear, it effectively prevents cylinder overload damage, significantly reduces maintenance costs, and improves production efficiency. At the same time, it adopts a simple and reliable mechanical structure and corrosion-resistant materials to ensure long-term stable operation of the device in harsh industrial environments.

[0010] This utility model is implemented as follows: a precise control device for the hydraulic shear stroke of a billet continuous casting machine, including a limiting component disposed on the upper shear blade seat and a triggering component disposed on the lower shear blade seat;

[0011] The limiting component includes a first fixing plate, a limiting body, and a contact head. The first fixing plate is fixedly connected to the upper shear blade seat. The limiting body is installed on the first fixing plate and has an internal mounting cavity. The contact head is slidably disposed in the mounting cavity and is connected to the hydraulic shear control circuit via an electric wire.

[0012] The triggering assembly includes a second fixing plate, a contact rod, and an adjusting nut. The second fixing plate is fixedly connected to the lower shear blade seat. The contact rod passes through the fixing plate. The adjusting nut is threaded to the contact rod and distributed on both sides of the second fixing plate to adjust the extension length of the contact rod.

[0013] When the shearing stroke reaches the set position, the contact rod triggers the contact head, sending a stop shearing signal to the solenoid directional valve of the shearing cylinder.

[0014] In a preferred embodiment of the present invention, a hydraulic shear stroke precision control device for a billet continuous casting machine, the contact head is axially reset along the mounting cavity of the limiting body by its own weight.

[0015] In a preferred embodiment of the hydraulic shear stroke precision control device for a billet continuous casting machine according to this utility model, the limit stroke adjusted by the adjusting nut is 10mm greater than the hydraulic shear stroke.

[0016] In a preferred embodiment of the hydraulic shear stroke precision control device for a billet continuous casting machine according to this utility model, the trigger end of the contact rod is a ball head structure, the contact receiving end of the contact head is a planar structure, and the normal of the contact surface of the two coincides with the axis of the mounting cavity.

[0017] In a preferred embodiment of the hydraulic shear stroke precision control device for a billet continuous casting machine according to this utility model, the limiting body is made of nylon, and the contact head and contact rod are made of copper.

[0018] In a preferred embodiment of the hydraulic shear stroke precision control device for a billet continuous casting machine according to this utility model, the first fixed plate and the upper shear blade seat, and the second fixed plate and the lower shear blade seat are all fixed by welding.

[0019] The beneficial effects of this utility model are:

[0020] 1. The device has a simple structure, and the components are easy to manufacture and have low cost, which reduces the difficulty of production and manufacturing and the cost of equipment investment. The limit device precisely controls the shearing stroke of the hydraulic shear, ensuring that it only moves to the set position (10mm more than the actual shearing stroke), avoiding fatigue fracture caused by long-term large stroke operation of the cylinder piston rod, and significantly extending the service life of the equipment.

[0021] 2. Effectively reduces the damage frequency of key components such as hydraulic cylinders and bolts, lowers spare parts replacement costs, reduces equipment downtime for maintenance, and improves production efficiency; adopts mechanical structures such as fixed plates, limit bodies, and contact rods, eliminating the need for complex control systems, making it easy to manufacture and install, and convenient to maintain.

[0022] The design of the contact head (copper material) and contact rod (ball head structure), combined with the nylon insulating limit body, ensures accurate and reliable signal triggering and avoids malfunctions caused by high temperature, humidity or electrical interference. At the same time, the contact head and contact rod are made of copper, which has excellent corrosion resistance and can operate stably in harsh environments such as high temperature, humidity and corrosive gases, thus extending service life. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0025] The markings in the diagram are: 1. First fixing plate; 2. Limiting body; 3. Wire; 4. Contact head; 5. Upper shear blade seat; 6. Lower shear blade seat; 7. Adjusting nut; 8. Second fixing plate; 9. Contact rod. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0027] Please see Figure 1 A precision control device for the hydraulic shear stroke of a billet continuous casting machine includes a limiting component located on the upper shear blade seat 5 and a triggering component located on the lower shear blade seat 6.

[0028] The limiting assembly includes a first fixing plate 1, a limiting body 2, and a contact head 4. The first fixing plate 1 is fixedly connected to the upper shear blade seat 5. The limiting body 2 is installed on the first fixing plate 1 and has an internal mounting cavity. The contact head 4 is slidably disposed in the mounting cavity and connected to the hydraulic shear control circuit via a wire 3.

[0029] The triggering assembly includes a second fixing plate 8, a contact rod 9, and an adjusting nut 7. The second fixing plate 8 is fixedly connected to the lower shear blade seat 6. The contact rod 9 passes through the second fixing plate 8. The adjusting nut 7 is threaded to the contact rod 9 and distributed on both sides of the second fixing plate 8 to adjust the extension length of the contact rod 9.

[0030] When the shearing stroke reaches the set position, the contact rod 9 triggers the contact head 4, sending a stop shearing signal to the solenoid directional valve of the shearing cylinder.

[0031] In this embodiment: the limiting component and the triggering component are rigidly connected (welded and fixed) to the upper and lower shear blade seats 6 by the first fixing plate 1 and the second fixing plate 8 respectively, forming a stroke monitoring system that moves synchronously with the shear blade; in the limiting component, the contact head 4 can move freely within the nylon limiting body 2 and is connected to the hydraulic shear control circuit by the wire 3; in the triggering component, the extension length of the contact rod 9 is adjusted by the adjusting nut 7 so that the limiting stroke is 10mm greater than the actual shearing stroke of the hydraulic shear (to ensure that the billet is cut off).

[0032] When the hydraulic shears perform a shearing action, the upper shear blade seat 5 and the lower shear blade seat 6 move relative to each other, causing the limit component and the trigger component to move closer to each other. When the shearing stroke reaches the set position, the contact rod 9 contacts the contact head 4, triggering an electrical signal and transmitting it to the control circuit, which energizes the solenoid directional valve of the shearing cylinder. The cylinder immediately stops the shearing action and drives the piston to retract. The contact head 4 automatically resets to the initial position under its own weight, waiting for the next shearing signal to complete the cycle.

[0033] As a technical optimization of this utility model, the contact head 4 relies on its own weight to axially reset along the mounting cavity of the limiting body 2.

[0034] In this embodiment: no additional power unit is required, ensuring that the contact head 4 automatically returns to the initial position after each shearing action, guaranteeing the reliability of the next shearing signal transmission, simplifying the structure and reducing the risk of failure.

[0035] As a technical optimization of this utility model, the limit stroke of the adjusting nut 7 is 10mm greater than the hydraulic shearing stroke.

[0036] In this embodiment, while achieving stroke control, it ensures that the hydraulic shear has sufficient stroke to cut the billet, avoiding the problem of incomplete cutting due to premature limit, thus balancing control accuracy and production requirements.

[0037] As a technical optimization of this utility model, the trigger end of the contact rod 9 is a ball head structure, the contact end of the contact head 4 is a planar structure, and the normal of the contact surface of the two coincides with the axis of the mounting cavity.

[0038] In this embodiment, the contact stability and accuracy between the contact rod 9 and the contact head 4 are further ensured, avoiding signal transmission delay or failure due to contact deviation, and improving control reliability.

[0039] As a technical optimization of this utility model, the limiting body 2 is made of nylon, and the contact head 4 and contact rod 9 are made of copper.

[0040] In this embodiment: the insulation of nylon material can effectively prevent electrical short circuit accidents; the corrosion resistance of copper material ensures that the components operate stably in high temperature, humid and corrosive environments, extending the service life of the device.

[0041] As a technical optimization of this utility model, the first fixing plate 1 and the upper shear blade seat 5, and the second fixing plate 8 and the lower shear blade seat 6 are all fixed by welding.

[0042] In this embodiment, a rigid connection between components is achieved through welding, ensuring that the device does not loosen under conditions such as shear vibration and high temperature, and guaranteeing the stability of the limiting and triggering accuracy.

[0043] Working principle and usage process of this utility model:

[0044] First, adjust the extension length of the contact rod 9 by adjusting nut 7 to ensure that the limit stroke is 10mm greater than the hydraulic shear stroke, so that the billet can be effectively sheared.

[0045] Standby state: The contact head 4 is in the initial position within the limiting body 2 by its own weight, waiting for the shearing signal. When the hydraulic shear receives the shearing signal, the shearing cylinder is activated. The upper shear blade seat 5 drives the limiting assembly (first fixed plate 1, limiting body 2, contact head 4) to move downward. The lower shear blade seat 6 drives the trigger assembly (second fixed plate 8, contact rod 9) to remain relatively stationary or move synchronously (depending on the shear blade movement mode).

[0046] Trigger signal: When the shearing stroke reaches the set position, the contact rod 9 contacts the contact head 4, and the electrical signal is transmitted to the control circuit through the wire 3.

[0047] Stop and Reset: The control circuit drives the solenoid directional valve of the shearing cylinder to be energized, the shearing cylinder stops shearing action, and the piston automatically retracts into the cavity; the contact head 4 slides back to the initial position along the mounting cavity of the limiting body 2 under its own weight.

[0048] Loop Waiting: The device returns to standby mode, waits for the next shear signal, and repeats the above process.

[0049] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] However, the above are merely specific embodiments of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A billet continuous casting machine hydraulic shear stroke precision control device, characterized in that: It includes a limiting component located on the upper shear blade seat (5) and a triggering component located on the lower shear blade seat (6); The limiting component includes a first fixing plate (1), a limiting body (2) and a contact head (4). The first fixing plate (1) is fixedly connected to the upper shear blade seat (5). The limiting body (2) is installed on the first fixing plate (1) and has an internal mounting cavity. The contact head (4) is slidably disposed in the mounting cavity and connected to the hydraulic shear control circuit via a wire (3). The triggering assembly includes a second fixing plate (8), a contact rod (9) and an adjusting nut (7). The second fixing plate (8) is fixedly connected to the lower shear blade seat (6). The contact rod (9) passes through the second fixing plate (8). The adjusting nut (7) is threaded to the contact rod (9) and distributed on both sides of the second fixing plate (8) to adjust the extension length of the contact rod (9). When the shearing stroke reaches the set position, the contact rod (9) triggers the contact head (4) to send a stop shearing signal to the solenoid directional valve of the shearing cylinder.

2. The billet continuous casting machine hydraulic shear stroke precision control device according to claim 1, characterized in that: The contact head (4) is axially reset along the mounting cavity of the limiting body (2) by its own weight.

3. The precise control device for the hydraulic shear stroke of a billet continuous casting machine according to claim 1, characterized in that: The adjustment nut (7) adjusts the limit stroke to be 10mm greater than the hydraulic shear stroke.

4. The billet continuous casting machine hydraulic shear stroke precision control device according to claim 1, characterized in that: The trigger end of the contact rod (9) is a ball head structure, and the contact end of the contact head (4) is a planar structure, and the normal of the contact surface of the two coincides with the axis of the mounting cavity.

5. The billet continuous casting machine hydraulic shear stroke precision control device according to claim 1, characterized in that: The limiting body (2) is made of nylon, and the contact head (4) and contact rod (9) are made of copper.

6. The billet continuous casting machine hydraulic shear stroke precision control device according to claim 1, characterized in that: The first fixing plate (1) and the upper shear blade seat (5), and the second fixing plate (8) and the lower shear blade seat (6) are all fixed by welding.

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