Shearing blade gap measuring device of large-scale hobbing shearing machine

Abstract

The invention belongs to the field of valves, and particularly relates to a shear blade gap detection device for a large-scale hobbing shear. According to the shear blade gap measuring device for the large hobbing shear, the advanced technology, the simple and reliable structure and the complete technical scheme are adopted, it is guaranteed that the device has the advantages of being high in automation degree, accurate in measurement, reliable in protection function and the like, an accurate shear blade gap detection scheme is provided for the device to shear large-breadth and thick steel plates, and the device is suitable for large-breadth and large-breadth and large-breadth and large-breadth and large-breadth and large-breadth and large-breadth steel plates. And the reliability of the equipment can be greatly improved. The device comprises a linear displacement sensor and is characterized in that the linear displacement sensor is arranged on a linear sensor support, a magnetic ring support connected with a lifting machine lead screw of the large-scale hobbing shearing machine is arranged in the linear sensor support, and an annular magnet matched with a detection rod of the linear displacement sensor is arranged on the magnetic ring support.

Description

Technical Field

[0001] This invention relates to a shear blade gap measuring device in large-scale rolling shears and large-scale rolling head shears for finishing and shearing of thick steel plates. Background Art

[0002] Domestic steel enterprises have increasingly higher requirements for product quality precision and specifications. Large-scale heavy plate production lines are undoubtedly an excellent technological means to improve the quality, output, and efficiency of heavy plates. Currently, the width specifications of domestic heavy plate rolling cutters and head cutters are 3000mm, 3500mm, 3800mm, 4300mm, and 5000mm, while there is a gap in the domestic market for rolling cutters and head cutters with widths of 5500mm and above. This invention is not only applicable to rolling cutters and head cutters with widths of 5000mm and below, but also applicable to the shear blade gap measuring device for rolling cutters and head cutters with widths of 5500mm and above.

[0003] The wider the steel plate being sheared, the more stringent the requirements for the precision of the shear blade gap. The shear blade gap value of a large-scale rolling shear for wide and thick plates of 5500mm or more is a key parameter of the equipment. Reliable shear blade gap adjustment and measurement technology is crucial to the shearing quality and precision of the equipment. In particular, the shear blade gap measuring device of a large-scale rolling shear for wide and thick plates of 5500mm or more is a core component of the equipment.

[0004] Large-scale rolling shears with widths exceeding 5500mm and large-scale rolling head shears can meet the demand for wide steel plates in industries such as military, nuclear energy, shipbuilding, bridge construction, and building construction. They achieve high production capacity, low energy consumption, and high yield, and more importantly, significantly reduce the risks associated with steel plate splicing and improve product performance. As rolling shears and large-scale rolling head shears develop towards larger scale, automation, intelligence, and specialization, the technical requirements for smooth, stepless, and bend-free steel plate cuts, low energy consumption, long service life, and high automation levels are becoming increasingly stringent. The need to improve the quality and efficiency of wide and thick plate shearing is also becoming increasingly apparent. Summary of the Invention

[0005] The purpose of this invention is to provide a shear blade gap measuring device for a large-scale rolling shear. This device adopts advanced technology, a simple and reliable structure, and a complete technical solution, ensuring that the equipment has the characteristics of high automation, accurate measurement, and reliable protection functions. It provides an accurate shear blade gap detection solution for the equipment to cut wide and thick steel plates, which can greatly improve the reliability of the equipment.

[0006] The objective of this invention is achieved as follows: A device for detecting the blade gap of a large rotary shearing machine, comprising a linear displacement sensor, characterized in that: the linear displacement sensor is mounted on a linear sensor bracket, and a magnetic ring bracket connected to the lifting screw of the large rotary shearing machine is mounted inside the linear sensor bracket, and an annular magnet that cooperates with the detection rod of the linear displacement sensor is mounted on the magnetic ring bracket.

[0007] In a preferred embodiment of the present invention, the annular magnet is mounted on the magnetic ring support by means of a magnetic shielding pad and a non-magnetic screw.

[0008] As another preferred embodiment of the present invention, four sets of external linear displacement sensors and ring magnets are used to detect the movement position of the four lifting screws. During the lifting process, the movement displacement of the lifting screws is the same as that of the fork and the vertically moving wedge of the wedge assembly. Therefore, the detected value can directly reflect the shear blade gap value of the rolling shear machine.

[0009] As a fourth preferred embodiment of the present invention, the sensor bracket is provided with an observation window on its side.

[0010] The key features of this invention lie in its structure and working principle. The shear blade gap measuring device is an important component of a large-scale rotary shearing machine, and its accuracy directly affects the shearing quality and precision of the steel plate. The core concept behind the development of the shear blade gap measuring device lies in the ability of four external linear displacement sensors to directly and accurately measure the impact of four sets of wedge groups on the gap between the upper shear blade on the upper blade holder and the lower shear blade on the lower blade holder. For rolling shears with widths exceeding 5500mm, the blade length is no less than 5700mm. Achieving shear blade gap measurement across such a large width is crucial for large rolling shears. This device not only monitors the operation of each wedge group during the shear blade gap adjustment phase but also ensures that the entire upper blade holder and upper shear blade maintain the shear blade gap under alternating high-load impacts throughout the shearing process, especially when continuously rolling high-strength, wide, and thick steel plates. It allows for timely detection of abnormal changes in the shear blade gap or asynchronous adjustments in the shear blade gaps of the various wedge groups, which is of great significance for equipment protection and improving cut quality and shearing accuracy.

[0011] Compared with existing technologies, the blade gap measuring device in this large-scale rotary shearing machine relies on mature detection methods, has a simple and reliable structure, and features an external linear displacement sensor. Compared to the traditional encoder-based method of detecting the synchronous shaft of the lifting machine, the shear blade gap measuring device in this large-scale rotary shearing machine provides more accurate detection. It effectively avoids the cumulative errors generated during encoder conversion and, more importantly, eliminates the risk of accidents caused by encoder failure or synchronous coupling breakage. Furthermore, the linear displacement sensor has a memory function, ensuring unaffected detection by power outages, eliminating the need to re-mark the shear blade gap at "zero" position due to power failures. Compared to the method of integrating the linear displacement sensor detection rod into the lifting machine's lead screw, the external sensor offers lower installation accuracy and manufacturing costs. It also avoids problems such as dust and water accumulation in the long inner hole of the lifting machine's lead screw sensor, which can damage the sensor. Additionally, since the lifting machine is typically located in a non-platform area, it is inconvenient for daily inspections and troubleshooting, increasing maintenance costs. This invention features an observation window on the sensor bracket, allowing inspectors to observe from a distance. If abnormal shear blade gaps are detected, fault diagnosis can be quickly performed, making repair and replacement more convenient and efficient. This invention perfectly realizes the research and optimized design of the shear blade gap measuring device for this large-scale rotary shearing machine and has been applied to the design of rotary shearing machines in large domestic steel companies, achieving independent research and development and a breakthrough in this technology. Attached Figure Description

[0012] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a three-dimensional digital model of the internal structure of the present invention.

[0014] Figure 2 This is a three-dimensional digital model diagram of the shear blade gap adjustment principle of the present invention.

[0015] Figure 3 This is a cross-sectional view of the internal location of the present invention in a large rotary shearing machine.

[0016] Referring to the accompanying drawings, a large-scale rotary shearing machine blade gap measuring device includes a linear displacement sensor 1, a sensor bracket 2, a ring magnet 4, a magnetic shielding pad 5, a non-magnetic screw 3, a magnetic ring bracket 6, a lifting screw 7, and a lifting housing 8. This device achieves blade gap measurement of the large-scale rotary shearing machine by detecting the blade gap adjustment system composed of a reduction motor 9, a lifting machine 10, a secondary coupling 11, a primary coupling 12, a pin 13, a fork 14, a vertical moving wedge 15, a horizontal moving wedge 16, a side slide plate of the main reduction gearbox 17, a main reduction gearbox 18, an upper blade holder 19, an upper shear blade 20, a lower blade holder 21, a lower shear blade 22, and a front panel device 23. Detailed Implementation

[0017] A large-scale rotary shearing machine blade clearance detection device is disclosed. This device employs an external detection element structure, including a linear displacement sensor 1, a sensor bracket 2, a ring magnet 4, a magnetic isolation pad 5, a non-magnetic screw 3, a magnetic ring bracket 6, lifting screws 7, and a lifting housing 8. The key feature is that the device uses four sets of external linear displacement sensors 1 and ring magnets 4 to detect the movement positions of four lifting screws 7. Since the lifting screws 7 move at the same displacement as the fork 14 and the vertically moving wedge 15 of the wedge assembly during their lifting and lowering processes, the detected values ​​directly reflect the blade clearance value of the rotary shearing machine. Simultaneously, an observation window is provided on the side of the sensor bracket 2, allowing direct observation. The working position of the ring magnet 4 facilitates inspection and maintenance, enabling troubleshooting without disassembly. The large-scale rotary shearing machine's blade gap detection device is equipped with four linear displacement sensors 1, which respectively detect the positions of the four lifting screws 7 and the vertical moving wedges 15, the synchronization of the wedge groups, and the blade gap value of the shearing machine. This method of using four sets of external linear displacement sensors 1 and ring magnets 4 for separate measurement is more accurate and reliable. Detecting changes in synchronization and differences helps to determine the stress state of each wedge group, allowing for better analysis of the blade gap detection of the large-scale rotary shearing machine. This provides more guidance for the use and maintenance of the equipment, effectively protecting the equipment and reducing operation and maintenance costs.

[0018] This large-scale rotary shearing machine's blade gap adjustment device features an external linear displacement sensor 1 structure. Unlike traditional encoders and proximity switches, this device uses four linear displacement sensors 1 mounted on sensor brackets 2. The sensor brackets 2 replace the lifting platform tailpipe and are threadedly fixed to the lifting platform housing 8. Related components such as the annular magnet 4, magnetic shielding gasket 5, and non-magnetic screw 3 are mounted on a magnetic ring bracket 6, moving up and down with the lifting platform's lead screw 7. Both the sensor brackets 2 and the magnetic ring bracket 6 are equipped with observation windows, allowing observation of the linear displacement sensor 1's operating status. When the large-scale rotary shearing machine is adjusting the blade gap... At the same time, one geared motor 9, four lifting platforms 10, two secondary couplings 11, and two primary couplings 12 are connected in series to synchronously drive the lifting platform screws 7 of the four lifting platforms 10 to move up and down. The lifting platform screws 7, through four sets of wedge groups forming a shear blade gap adjustment mechanism consisting of a pin shaft 13, a fork 14, a vertical moving wedge 15, a horizontal moving wedge 16, a side slide plate 17 of the shear machine's main reduction gearbox, and the shear machine's main reduction gearbox body 18, act on the upper blade holder 19 and the upper shear blade 20. By changing the position of the upper shear blade 20, the position of the upper shear blade 20 relative to the fixed lower blade holder 21, lower shear blade 22, and front panel device 23 is changed. The shearing gap adjustment mechanism of the large-scale rotary shearing machine is designed to achieve precise detection of the shearing gap value and its changes. Throughout the shearing process, the shearing gap measuring device relies on four sets of linear displacement sensors 1 and related sensing elements to continuously monitor the movement positions of the four vertically moving wedges 15. Based on the working principle of the shearing gap adjustment wedge group, the device can accurately detect the shearing gap value and its changes. Each linear displacement sensor 1 can limit the shearing gap adjustment range according to the adjustment requirements, protecting the safety of the upper shearing blade 20, lower shearing blade 22, elevator 10, and the entire equipment. Meanwhile, the direct measurement of the wedge assembly by the linear displacement sensor 1 reduces the conversion error and cumulative error of the shear blade gap measurement, resulting in more accurate measurements and enabling automatic monitoring and control of the equipment's operating status. More importantly, the external linear displacement sensor 1's structure facilitates daily equipment inspections and has lower manufacturing, installation, and maintenance costs. When abnormalities occur in the shear blade gap adjustment and detection device, the cause of the fault can be identified immediately without disassembling related parts. This is of great significance for equipment protection and improving the quality and accuracy of steel plate shearing, reducing the equipment's failure rate and enhancing its operational reliability.

[0019] It is understood that the above specific description of the present invention is only for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effect, but as long as the use needs are met, they are all within the protection scope of the present invention.

Claims

1. A device for detecting the blade gap of a large rolling shear, comprising a linear displacement sensor (1), characterized in that: The linear displacement sensor (1) is mounted on the linear sensor bracket (2). The linear sensor bracket (2) contains a magnetic ring bracket (6) connected to the lifting screw of the large rolling shear machine. The magnetic ring bracket (6) contains a ring magnet (4) that cooperates with the detection rod of the linear displacement sensor (1).

2. The shear blade gap detection device for a large rolling shear machine according to claim 1, characterized in that: The annular magnet (4) is mounted on the magnetic ring bracket (6) by a magnetic shielding pad (5) and a non-magnetic screw (3).

3. The shear blade gap detection device for a large rolling shear machine according to claim 1, characterized in that: Four sets of external linear displacement sensors (1) and ring magnets (4) are used to detect the movement position of four lifting screws (7). During the lifting process, the lifting screws (7) have the same movement displacement as the fork (14) and the vertically moving wedge (15) of the wedge group. Therefore, the detected value can directly reflect the shear blade gap value of the rolling shear machine.

4. The shear blade gap detection device for a large rolling shear machine according to claim 1, characterized in that: The sensor bracket (2) has an observation window on its side.

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