Blank turning arm of shock-resistant slab turning machine
By using high-strength alloy steel, shaft sleeve and disc spring group on the flip arm, the problem of easy damage to the flip arm is solved, and the stability and production efficiency of the equipment are improved.
Patent Information
- Application Number
- CN202422424543.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The existing slab turner arms are easily damaged during the process of flipping heavy-duty slabs, resulting in high-frequency failures and high maintenance costs, which affects production efficiency.
A shock-resistant slab turning machine turning arm is designed, using high-strength alloy steel material, with a shaft sleeve and a disc spring group added, combined with damping and reinforcement ribs, optimized structure to reduce impact and wear and improve stability.
Effectively reduce equipment damage rate, extend service life, reduce maintenance costs, improve blank turnover efficiency and equipment stability, and create safe and efficient production conditions.
Smart Images
Figure CN223117443U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of metallurgy, and particularly relates to a turning arm of an impact-resistant slab turning machine. Background Art
[0002] During the operation of a slab continuous casting machine, various comprehensive factors cause different degrees of defects on the slab surface, such as transverse cracks, transverse corner cracks, longitudinal surface cracks, longitudinal corner cracks, surface star cracks, surface scratches, roll marks, etc. To meet the requirements of high-quality products in subsequent processes, it is necessary to perform operations such as peeling and chamfering to eliminate the defects. During this process, the slab turning machine becomes the key core equipment for slab turning, and its performance plays a crucial role in the slab processing efficiency. Currently, the turning machine uses a double-row swing arm type hydraulic cylinder to drive and turn one slab each time. Its support platform is a welded assembly. During the process of turning a slab weighing nearly 30t, due to repeated impacts, the base deforms, and the shaft holes of the turning arm wear, resulting in the replacement of the turning arm, damage to the oil cylinder, oil leakage, etc. The failures occur frequently, and the inspection and maintenance costs are relatively high. Content of the Utility Model
[0003] Aiming at the deficiencies of the existing technology, the utility model proposes a turning arm of an impact-resistant slab turning machine to solve the problem of high-frequency failures of the existing turning machine.
[0004] The utility model provides a turning arm of an impact-resistant slab turning machine, including:
[0005] A turning arm main body with a square cross-section;
[0006] A bushing is arranged at the pin shaft hole of the turning arm main body;
[0007] A disc spring group is arranged at the top of the turning arm main body at the part in contact with the slab.
[0008] In some embodiments, the turning arm main body includes a first end where the slab enters and a second end opposite to the first end;
[0009] The disc spring group is arranged at the second end;
[0010] A plurality of dampers are arranged at the first end of the top of the turning arm main body along the direction where the slab enters, and the dampers and the bottom surface of the slab form contact points;
[0011] The horizontal position of the disc spring group is higher than that of the damper.
[0012] In some embodiments, reinforcing ribs are arranged inside the turning arm main body.
[0013] In some embodiments, the material of the turning arm main body is high-strength alloy steel, and an environmental protection coating is arranged on the outer surface of the turning arm main body.
[0014] In some embodiments, the bushing is configured to receive a safety pin for flipping movement during normal operation and limiting movement during abnormal operation.
[0015] In some embodiments, the stiffness of the springs in the disc spring group ranges from 550 N / mm to 1000 N / mm.
[0016] In some embodiments, the disc spring group includes a plurality of disc spring modules;
[0017] The plurality of disc spring modules are installed in an opposing manner;
[0018] The single disc springs inside each disc spring module are stacked and installed.
[0019] In some embodiments, the end face on the surface with the largest outer edge dimension in the outermost disc spring module is the stress-bearing surface in contact with the slab.
[0020] In some embodiments, the disc spring group includes a guide mandrel;
[0021] The guide mandrel is sleeved in the disc spring module, and the clearance between the guide mandrel and the disc spring module is between 0.5 ± 0.2 mm.
[0022] In some embodiments, the material of the disc spring group is high-toughness alloy steel.
[0023] The beneficial effects of the present utility model are as follows:
[0024] The present utility model provides a turning arm of an impact-resistant slab turning machine, including: a turning arm main body having a square cross-section; a bushing provided at the pin hole of the turning arm main body; and a disc spring group provided at the top of the turning arm main body at the position in contact with the slab.
[0025] The present utility model transforms the steel structure seat of the traditional turning arm into an impact-resistant seat, adds a bushing at the oil cylinder trunnion, enhances the seismic resistance of the turning machine while preventing damage to the welded steel structure body, and reduces the equipment operation and maintenance costs. It optimizes the structural stability and impact resistance of the turning arm of the turning machine, and improves its stability through optimized design; realizes the essential safety of the equipment, creates favorable conditions for efficient and stable production. It greatly reduces the impact on the steel structure base of the turning machine body during the tilting of the slab, prevents damage to the body, improves the turning efficiency of the turning machine and the equipment operation and maintenance costs, and has strong practical significance. Description of the Drawings
[0026] To better understand the present utility model, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily drawn to scale, and relevant elements may be omitted, or in some cases the scale may have been enlarged to emphasize and clearly show the novel features described herein. Additionally, as is known in the art, the system components may be arranged differently. Furthermore, in the drawings, the same reference numerals represent corresponding parts throughout several views.
[0027] Figure 1 Fig. 4 shows a reference schematic front view of the turning arm of an impact-resistant slab turning machine of the present utility model;
[0028] Figure 2 Fig. 8 shows a reference schematic side view of the turning arm of an impact-resistant slab turning machine of the present utility model;
[0029] Figure 3 Fig. 12 shows a reference schematic top view of the turning arm of an impact-resistant slab turning machine of the present utility model;
[0030] Figure 4 Fig. 16 shows a partial structural schematic diagram of the bushing of the turning arm of an impact-resistant slab turning machine of the present utility model;
[0031] Figure 5 Fig. 20 shows a reference schematic front view of the partial structure of the disc spring group of the turning arm of an impact-resistant slab turning machine of the present utility model;
[0032] Figure 6 Fig. 24 shows a reference schematic side view of the partial structure of the disc spring group of the turning arm of an impact-resistant slab turning machine of the present utility model;
[0033] Figure 7 Fig. 28 shows a reference schematic top view of the partial structure of the disc spring group of the turning arm of an impact-resistant slab turning machine of the present utility model;
[0034] Explanation of reference numerals: 1, main body of the turning arm; 2, bushing; 3, disc spring group; 4, disc spring module; 5, guiding mandrel; 6, damping; 7, reinforcing rib. Detailed implementation manners
[0035] It should be understood that the embodiments of the present utility model shown in the exemplary embodiments are merely illustrative. Although only a few embodiments have been described in detail in the present utility model, those skilled in the art can easily appreciate that various modifications are feasible without substantially departing from the teachings of the subject matter of the present utility model. Accordingly, all such modifications should be included within the scope of the present utility model. Without departing from the gist of the present utility model, other substitutions, modifications, variations, and deletions can be made to the design, operating conditions, parameters, etc. of the following exemplary embodiments.
[0036] The present utility model provides a turning arm for an impact-resistant slab turning machine. Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 . It includes: a turning arm main body 1 with a square cross-section; a bushing 2 arranged at the pin hole of the turning arm main body 1; a disc spring group 3 arranged at the top of the turning arm main body 1 at the part in contact with the slab.
[0037] After observing the whole process of the slab tipping over in the turning machine repeatedly, it is found that when the inclination angle of the slab (weighing about 30T) gradually increases, the slab slides down rapidly along the roller on the turning arm main body 1 and contacts the limit base, generating a large instantaneous impact, which causes certain impacts on the oil cylinder trunnion mounting shaft hole, the oil cylinder, and the limit base. By using the telescopic and impact-resistant properties of the disc spring group 3, the limit base is optimized into an impact-resistant telescopic base with a disc spring group 3 to reduce damage to the equipment.
[0038] In the original design, the turning arm main body 1 and the lifting arm oil cylinder are connected by a pin shaft through the shaft hole on the turning arm main body 1 and the piston rod of the oil cylinder (with a spherical plain bearing). During the long-term and repeated process of tipping over the slab, due to the movement between the shaft and the shaft hole, the shaft hole is deformed, worn, and enlarged. In severe cases, the steel structure welded parts of the turning arm main body 1 are scrapped. Therefore, in this application, a bushing 2 is added at the original shaft hole, and the bushing 2 is sleeved around the inner circumference of the pin hole as shown in Figure 4 to protect the pin hole of the turning arm main body 1 and extend the service life of the turning arm main body 1.
[0039] In the original design, under the drive of the lifting arm oil cylinder, as the turning angle increases, the slab slides down along the roller on the turning arm main body 1 and collides with the steel structure stop seat, thereby achieving a braking effect. During the whole process, the entire steel structure parts bear a large impact. Repeatedly tipping over the slab causes great damage to the steel structure parts, such as weld cracking and deformation, resulting in replacement. Therefore, in this application, an impact-resistant stop seat is designed using the function of the disc spring, changing the original rigid impact into a slow release of impact kinetic energy to reduce damage to the steel structure of the turning arm main body 1.
[0040] In some embodiments, please refer to Figure 3 . The turning arm main body 1 includes a first end where the slab enters and a second end opposite to the first end;
[0041] The disc spring group 3 is arranged at the second end;
[0042] A plurality of dampers 6 are arranged at the first end of the top of the turning arm main body 1 along the direction where the slab enters, and contact points are formed between the dampers 6 and the bottom surface of the slab;
[0043] The horizontal position of the disc spring group 3 is higher than that of the damper 6.
[0044] The damper 6 is arranged on the inner surface between the two protrusions on the top of the billet turning arm body 1 and is flush with the two protrusions. The first end and the second end of the billet turning arm body 1 respectively correspond to Figure 1 the left end and the right end in
[0045] The operator places the slab horizontally from the first end at the top of the billet turning arm body 1. During the movement, the top surface formed by the damper 6 and the two protrusions contacts the bottom surface of the slab, increasing the friction force of the horizontal movement until the side surface of the slab impacts and contacts the disc spring group 3 located at the second end and stops. When the billet turning arm body 1 works, it drives the slab to flip together. During the flipping process, the slab slides down. Through the contact point formed by the damper 6, the friction force during the sliding process is increased, and the impact force of the sliding slab on the disc spring group 3 is reduced.
[0046] Compared with the huge impact force caused by not setting the damper in the original device, the newly added damper 6 in this device can greatly reduce the speed and impact force of the slab during the sliding process, and together with the newly added billet turning arm 3, effectively protects the billet turning arm body.
[0047] The damper 6 can absorb and disperse the impact energy generated during the flipping process of the slab, reducing the instantaneous impact force received by the billet turning arm. It can also act as a support point and together with the two protrusions support the slab to protect the structure of the billet turning arm from damage and extend its service life. When the damper 6 is vibrated, it will deform and consume energy, thereby reducing the vibration amplitude of the billet turning arm and the entire system. This helps to improve the stability and working accuracy of the equipment.
[0048] In some embodiments, a reinforcing rib 7 is arranged inside the billet turning arm body 1. The reinforcing rib 7 is installed inside the billet turning arm body 1, and the reinforcing rib 7 is embedded in the inner wall of the billet turning arm body 1 and is arranged close to the top of the billet turning arm body 1. The horizontal plane of the reinforcing rib 7 is lower than that of the damper 6. The reinforcing rib 7 is located inside the billet turning arm body 1, and the damper 6 is located outside the billet turning arm body 1.
[0049] The reinforcing rib 7 can effectively enhance the overall strength and rigidity of the billet turning arm body 1, enabling it to withstand greater working loads and impact forces, which is crucial for the stability and safety of the billet turning arm when flipping heavy slabs, and can reduce the deformation amount of the billet turning arm body 1 during the stress process, ensuring the accuracy and stability of the billet turning process. During long-term and high-frequency use, the role of the reinforcing rib 7 is more obvious.
[0050] In some embodiments, the material of the billet turning arm body 1 is high-strength alloy steel, and an environmental protection coating is provided on the outer surface of the billet turning arm body.
[0051] High-strength alloy steel has higher strength and hardness than ordinary steel and can withstand greater loads and impacts. The billet turning arm needs to frequently turn heavy billets, and the high-strength alloy steel is more wear-resistant, which can extend the service life of the billet turning arm and reduce the maintenance and replacement costs caused by wear.
[0052] The environmentally friendly coating can improve the surface corrosion resistance and wear resistance of the billet turning arm body 1, protect it from erosion and wear caused by environmental factors, extend the service life of the billet turning arm, and maintain its good appearance and performance.
[0053] In some embodiments, see Figure 1 and Figure 4 The sleeve 2 is configured to receive a safety pin inserted therein for normal flipping movement and abnormal movement restriction.
[0054] In the original device, the safety pin is directly inserted into the pin shaft hole, but in this device, since the shaft sleeve 2 is installed inside the pin shaft hole, the safety pin is directly inserted into the shaft sleeve 2 and inserted from the middle circumference of the shaft sleeve 2, which can ensure the smooth turning movement of the billet turning arm body 1, make the movement between the billet turning arm body 1 and related components more stable, and reduce the jamming or stagnation caused by unstable connection. The insertion of the safety pin enhances the connection stability between the shaft sleeve 2 and related components, helps to improve the stability and reliability of the entire billet turning machine, and reduces failures caused by loose or falling connections.
[0055] When an abnormality occurs, such as overload or jamming, the safety pin can respond quickly and limit further movement by shearing or failure, thereby protecting the sleeve 2 and related components from damage, helping to extend the service life of the equipment and reduce maintenance costs. When the safety pin shears or fails due to overload, its obvious signs of damage help to quickly locate the fault point, facilitating subsequent troubleshooting and maintenance work. This can shorten the downtime of the equipment and improve production efficiency.
[0056] In some embodiments, the stiffness of the springs in the disc spring group 3 is in the range of 50 N / mm to 1000 N / mm.
[0057] The disc spring group 3 can adapt to a variety of different working scenarios and load requirements. Whether it is an occasion where a smaller stiffness is required to achieve fine control, or an occasion where a larger stiffness is required to withstand a large load, this disc spring group 3 can meet the needs. By adjusting the combination and number of disc springs, the overall stiffness of the disc spring group 3 can be flexibly adjusted within a large range to adapt to different working requirements.
[0058] In the range of relatively high stiffness, the disc spring group 3 responds faster to the load, can quickly absorb and disperse the impact energy, and ensure the stable operation of the equipment. The relatively high stiffness means that the disc spring group 3 can bear a greater load without excessive deformation. In case of emergencies such as overload or impact, the disc spring group 3 with high stiffness can better protect the equipment from damage and improve the safety and reliability of the equipment.
[0059] In some embodiments, referring to Figure 1 , Figure 5 , Figure 6 and Figure 7 , the disc spring group 3 includes a plurality of disc spring modules 4; the plurality of disc spring modules 4 are installed in an opposing manner; the single disc springs inside each disc spring module 4 are stacked and installed.
[0060] The plurality of disc spring modules 4 are installed in an opposing manner, and the plurality of disc spring modules 4 jointly bear the load, which can significantly increase the total load-bearing capacity. The single disc springs inside each disc spring module 4 are stacked and installed, and the disc spring group 3 can effectively increase the total stroke, meet the requirements for a larger displacement range, and the disc spring group 3 can still maintain stable performance in occasions where a larger deformation amount is required.
[0061] By changing the ratio of the inner truncated cone height to the thickness of the disc, or through the combination of discs with different thicknesses and the stacking of different numbers of discs, different spring characteristic curves such as linear type, increasing type, decreasing type, or combinations of these forms can be obtained. This variable stiffness characteristic enables the disc spring group 31 to adapt to the load requirements under different working conditions and provide a more precise mechanical response.
[0062] In some embodiments, referring to Figure 1 , Figure 5 , Figure 6 and Figure 7 , the end face on the largest outer edge dimension surface in the outermost disc spring module 4 is the force-bearing surface in contact with the slab.
[0063] The largest force-bearing surface can more effectively disperse the pressure borne by the slab, avoid local stress concentration, help reduce the deformation and damage of the slab during the force-bearing process, and improve the processing accuracy and product quality. The large contact area increases the friction between the slab and the force-bearing surface, making the slab more stable during the processing and not prone to slipping or offsetting.
[0064] In some embodiments, referring to Figure 1 , Figure 5 , Figure 6 and Figure 7 ,
[0065] The disc spring group 3 includes a guide mandrel 5; the guide mandrel 5 is sleeved in the disc spring module 4, and the clearance between the guide mandrel 5 and the disc spring module 4 is between 0.5±0.2 mm.
[0066] An appropriate clearance can reduce the direct contact between the guide mandrel 5 and the disc spring, thereby reducing the wear caused by friction and extending the service life of both. An overly small clearance may cause jamming between the guide mandrel 5 and the disc spring during movement, affecting the normal operation of the equipment. An appropriate clearance can ensure the smooth movement of the guide mandrel 5 in the disc spring, improve the reliability and stability of the equipment, reduce the energy loss caused by friction and resistance, enable the guide mandrel 5 and the disc spring to respond more quickly when subjected to external forces, and improve the overall performance of the equipment. It helps to ensure the precise positioning of the guide mandrel 5 in the disc spring, avoid positioning errors caused by too large or too small clearances, and ensure the machining accuracy and product quality of the equipment.
[0067] In some embodiments, the material of the disc spring group 3 is high-toughness alloy steel.
[0068] High-toughness alloy steel can withstand greater impact loads without being easily broken, which is particularly important for the disc spring group 3 that needs to frequently bear dynamic loads or impacts. During long-term use, high toughness can reduce the risk of fatigue failure and improve the service life of the disc spring group 3.
[0069] In some embodiments, according to statistics, a total of 12 lifting arm cylinders (unit price: 12,000 yuan per piece), 2 turning arm blanks (unit price: 44,000 yuan per piece) were replaced in 2023, and more than 20 large and small support seat copper sleeves (average price: 1,000 yuan per pair) were replaced. It is estimated that after the transformation is implemented, the use of spare parts will be reduced by 50%. The turning arm blanks no longer need to be replaced, and only the bushings need to be replaced, directly saving the spare parts cost: 1.2*6 + 4.4*2 + 10*0.1 = 170,000 yuan.
[0070] Production benefits of production capacity improvement
[0071] Be = Ci×Ti×Ai×Gi - Bi = 60000*12*10%*0.942*0.97*0.1*200 - 10000 = 1,305,800 yuan;
[0072] Among them, Be: the benefits created by shortening the maintenance time;
[0073] Ci: The defective slab billets processed in this process are about 60,000 T per month;
[0074] Ti: The production capacity is increased by 10%;
[0075] Ai: The technical contribution coefficient is 0.1;
[0076] Gi: Unit product benefit (price difference between qualified products and downgraded products) is 200 yuan / ton;
[0077] Bi: R & D investment is 0.1 ten thousand yuan;
[0078] The total cumulative benefit generated throughout the year is 1.4758 million yuan.
[0079] This utility model transforms the steel structure retaining seat of the turning arm into an impact-resistant retaining seat and adds a bushing at the oil cylinder trunnion. While enhancing the seismic resistance of the turning machine, it prevents damage to the welded steel structure body and reduces the equipment operation and maintenance costs. It optimizes the structural stability and impact resistance of the turning arm of the turning machine, and improves its stability through optimized design; realizes the essential safety of the equipment and creates favorable conditions for efficient and stable production. It greatly reduces the impact on the steel structure base of the turning machine body during the slab tipping process, prevents the body from being damaged, improves the turning efficiency of the turning machine and the equipment operation and maintenance costs, and has strong practical significance.
[0080] The above embodiments are possible examples of the implementation manners of this utility model and are only given to enable those skilled in the art to clearly understand the principle of this utility model. Those skilled in the art should understand that the above discussion for any embodiment is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of this utility model includes that the claims are limited to these examples. Under the overall concept of this utility model, the technical features between the above embodiments or different embodiments can also be combined with each other, and many other variations in different aspects of the embodiments of this utility model as described above will be generated. For the sake of brevity, they are not provided in the specific implementation manners. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of this utility model shall be included within the scope of protection required by this utility model.
Claims
1. An impact-resistant billet turning arm of a billet turning machine, characterized in that, Comprising: A turning arm body (1) with a square cross-section; A bushing (2) arranged at the pin hole of the turning arm body (1); A disc spring group (3) arranged at the top of the turning arm body (1) at the part in contact with the slab.
2. The turning arm of the impact-resistant slab turning machine according to claim 1, characterized in that The turning arm body (1) includes a first end where the slab enters and a second end opposite to the first end; The disc spring group (3) is arranged at the second end; A plurality of dampers (6) are arranged at the first end of the top of the turning arm body (1) along the direction where the slab enters, and contact points are formed between the dampers (6) and the bottom surface of the slab; The horizontal position of the disc spring group (3) is higher than that of the damper (6).
3. The turning arm of the impact-resistant slab turning machine according to claim 1, characterized in that Reinforcing ribs (7) are arranged inside the turning arm body (1).
4. The turning arm of the impact-resistant slab turning machine according to claim 1, characterized in that, The material of the turning arm body (1) is high-strength alloy steel, and an environmental protection coating is arranged on the outer surface of the turning arm body (1).
5. The turning arm of the impact-resistant slab turning machine according to claim 1, characterized in that, The bushing (2) is configured to receive a safety pin for normal flipping movement and movement limitation in case of abnormality.
6. The turning arm of the impact-resistant slab turning machine according to claim 1, wherein, The stiffness of the springs in the disc spring group (3) is in the range of 550 N / mm to 1000 N / mm.
7. The turning arm of the impact-resistant slab turning machine according to claim 1, characterized in that The disc spring group (3) includes a plurality of disc spring modules (4); A plurality of the disc spring modules (4) are installed in an opposing manner; The single disc springs inside each disc spring module (4) are stacked and installed.
8. The turning arm of the impact-resistant slab turning machine according to claim 7, characterized in that The end face on the surface with the largest outer edge dimension in the outermost disc spring module (4) is the stress-bearing surface in contact with the slab.
9. The turning arm of the impact-resistant slab turning machine according to claim 7, characterized in that The disc spring group (3) includes a guide core shaft (5); The guide core shaft (5) is sleeved in the disc spring module (4), and the gap between the guide core shaft (5) and the disc spring module (4) is between 0.5 ± 0.2 mm.
10. The turning arm of the impact-resistant slab turning machine according to claim 1, characterized in that The material of the disc spring group (3) is high-toughness alloy steel.