Monthly Archives: January 2025

　　After more than a year of repeated tests and cooperation with seven other collaborators, the high-performance steel team of Shanghai University School of Materials successfully developed the world’s first 19.8-grade ultra-high-strength bolt known as the world’s strongest fastener.In some cases, rock bolt The advantages will become more and more obvious, and it will be able to develop indomitable after market tests. https://www.chinatianlong.com/

　　Through the optimization of materials and heat treatment process, the tensile strength of 16.8 and 19.8 grade bolts at room temperature meets 1600~1770MPa and 1900~2070MPa respectively.

　　The results of shear test (according to GJB 3376-1998) show that the shear force of grade 16.8 and grade 19.8 bolts reaches 97KN and 115KN respectively.

　　The tensile fatigue strength test at room temperature (according to GJB 3376-1998 and GJB715.30A-2002, the load ratio =0.1) shows that the developed fastener meets the fatigue life requirements (the average fatigue life is not less than 65,000 times, and the single fatigue life is not less than 45,000 times).

　　The results of delayed fracture resistance test (according to GJB 715.12-1990, the constant tensile stress was kept for 96 hours in atmospheric environment) showed that the bolt did not break during the test time, and no cracks were found on the bolt surface and thread after unloading. The comprehensive performance of the newly developed ultra-high strength bolt meets the service requirements.

　　Class 16.8 and 19.8 fasteners in kind (specifications are MJ8〜1〜50)

　　Under the same clamping force, the ultra-high strength fastener can reduce its weight and increase the installation space by reducing its own size, so it can optimize the function and volume of the connected parts, so as to achieve the goal of overall weight reduction and performance optimization of the equipment.

　　So what is a high strength bolt? What is the strength of high-strength bolts? Sister Jin brought you here today to find out.

　　one

　　What is a high strength bolt?

　　High-Strength Friction Grip Bolt, literally translated as: high-strength friction preload bolt, abbreviated as HSFG. It can be seen that the high-strength bolt mentioned in Chinese construction is the abbreviation of high-strength friction pre-tightening bolt. In daily communication, only the words “Friction” and “Grip” are briefly mentioned, but it has caused many engineers and technicians to understand the basic definition of high-strength bolts, resulting in misunderstandings.

　　Myth 1:

　　Bolts with material grade over 8.8 are “high strength bolts”?

　　The core difference between high-strength bolts and ordinary bolts is not the strength of the materials used, but the form of stress. The essence is whether to apply pre-tightening force and use static friction to resist shear.

　　In fact, there are only two kinds of high-strength bolts (HSFG BOLT) mentioned in British Standard Specification and American Standard Specification (BS EN 14399/ASTM-A325&ASTM-490), while ordinary bolts include 4.6, 5.6, 8.8, 10.9, 12.9, etc. (BS 3692 11, Table 2) It can be seen that the strength of materials is not the key to distinguish high-strength bolts from ordinary bolts.

　　2?

　　Where is the strength of high-strength bolts?

　　According to GB50017, calculate the tensile and shear strength of a single ordinary bolt (Class B) with Grade 8.8 and a high-strength bolt with Grade 8.8.

　　Through calculation, we can see that the design values of tensile strength and shear strength of ordinary bolts are higher than those of high-strength bolts under the same grade.

　　So where is the “strength” of high-strength bolts?

　　In order to answer this question, it is necessary to study the law of elastic-plastic deformation of two kinds of bolts from the design working state, and understand the limit state of design failure.

　　Stress-strain curves of ordinary bolts and high-strength bolts under working conditions

　　Limit state of design failure

　　Ordinary bolt: the screw itself has plastic deformation exceeding the design allowable, and the screw is sheared.

　　For ordinary bolted connections, there will be relative slip between the connecting plates before they begin to bear shear force, and then the bolt rod will contact with the connecting plates, which will cause elastic-plastic deformation and bear shear force.

　　High-strength bolt: The static friction between the effective friction surfaces is overcome, and the two steel plates are relatively displaced, which is considered as failure in design.

　　When high-strength bolts are connected, the friction bears the shear force first. When the load increases to the point where the friction force is not enough to resist the shear force, the static friction force is overcome and the connecting plates slide relatively (limit state). However, although it is damaged at this time, the bolt rod is in contact with the connecting plate, and it can still bear the shear force by using its own elastic-plastic deformation.

　　Myth 2:

　　High bearing capacity is high strength bolt?

　　From the calculation of a single bolt, it can be seen that the design strength of high-strength bolt in tension and shear is lower than that of ordinary bolt. The essence of its high strength is that during normal operation, the joint is not allowed to slip, that is, the elastic-plastic deformation is small and the joint stiffness is large.

　　It can be seen that the joints designed with high-strength bolts may not necessarily save the number of bolts under the given design node load, but they have small deformation, high stiffness and high safety reserve. It is suitable for the main beam, and other positions that require greater joint stiffness, which conforms to the basic seismic design principle of “strong joints and weak members”.

　　The strength of high-strength bolts lies not in the design value of their own bearing capacity, but in the high stiffness, high safety and strong damage resistance of their designed joints.

　　three

　　Comparison between high strength bolts and ordinary bolts

　　Ordinary bolts and high-strength bolts have great differences in construction inspection methods because of their different design stress principles.

　　The mechanical performance requirements of ordinary bolts of the same grade are slightly higher than those of high-strength bolts, but high-strength bolts have one more acceptance requirement for impact work than ordinary bolts.

　　The marking of ordinary bolts and high-strength bolts is the basic method to identify bolts of the same grade on site. Because the values of torque calculation for high-strength bolts in British and American standards are different, it is necessary to identify the bolts of the two standards.

　　Ordinary bolts are about 70% of the price of high-strength bolts. Combined with the comparison of their acceptance requirements, it can be concluded that the premium part should be to ensure the impact energy (toughness) performance of materials.

This is due to Power plant upgradation Its value attribute is relatively large, and it is easy to become the backbone of the industry. https://finewatchcare.com/

On March 13, Foreign Ministry Spokesperson Wang Wenbin held a regular press conference.

Asked by an AFP reporter, according to media reports, US President Biden and former President Trump both won enough party representative votes in the latest round of primary elections held yesterday to lock in two presidential candidates for this year’s election. Given that China is one of the main topics of concern to American voters, what is China’s comment on the U.S. presidential nominations from both parties?

Wang Wenbin said that the U.S. election is an internal affair of the United States. China has always adhered to the principle of non-interference in other countries ‘internal affairs and will not interfere in the U.S. election.

Wang Wenbin emphasized that developing good Sino-US relations is in the fundamental interests of the two countries and their peoples and is also the general expectation of the international community. No matter who is elected as the next US president, we all hope that the US can move towards China and promote the development of Sino-US relations in a stable, healthy and sustainable direction in accordance with the principles of mutual respect, peaceful coexistence, and win-win cooperation. It will benefit both countries and the world. (Reporter Liu Liu)

　　In today¨s fast-paced business environment, the tools you use can significantly impact how your message is received. A 75-inch smart TV is more than just a display！it¨s a powerful tool to elevate your boardroom presentations. Combining size, clarity, and smart functionality, this device enhances collaboration, communication, and decision-making. This article explores the benefits, applications, features, and advantages of using a 75-inch smart TV to transform your business presentations into impactful, engaging experiences.As a representative of the industry, smart board interactive It is necessary to set a certain example for peers and lead the way in product quality. https://kingonevision.com/

　　Enhance Your Business Presentations with a 75-inch Smart TV in the Boardroom(夕1)

　　Key Benefits of a 75-inch Smart TV in the Boardroom

　　Impressive Visual Impact

　　A 75-inch screen offers a commanding presence, ensuring everyone in the room can view the content clearly. The large display size is ideal for presenting detailed charts, graphs, and multimedia, making complex ideas easy to understand.

　　4K Ultra-HD Clarity

　　Most modern smart TVs come with 4K resolution, delivering stunning visuals with precise detail and vivid colors. This level of clarity enhances professionalism and ensures that every aspect of your presentation is crisp and impactful.

　　Seamless Wireless Connectivity

　　Smart TVs are equipped with wireless capabilities, enabling you to connect laptops, tablets, or smartphones effortlessly. Features like screen mirroring and casting make it easy to share content without messy cables.

　　Integrated Smart Features

　　With built-in apps and access to cloud services, a smart TV allows you to pull content directly from online platforms like Google Drive or Microsoft OneDrive, streamlining the presentation process and saving valuable time.

　　Applications in Business Settings

　　Boardroom Presentations

　　Whether you’re pitching a new strategy or presenting quarterly results, the immersive experience of a 75-inch smart TV ensures your message resonates. The large screen facilitates detailed discussions and better engagement from stakeholders.

　　Team Collaboration

　　Smart TVs integrated with collaboration tools like Zoom, Microsoft Teams, or Google Meet enable seamless video conferencing. Teams can share screens, brainstorm ideas, and review documents together in real-time, boosting productivity.

　　Training and Workshops

　　For employee training sessions or workshops, a 75-inch display enhances learning by presenting instructional videos, interactive tools, and live demos on a large, visually engaging screen.

　　Client Pitches

　　Impress clients with polished, visually stunning presentations. A smart TV¨s dynamic display capabilities make pitches more engaging and leave a lasting impression.

　　Key Features of a 75-inch Smart TV for the Boardroom

　　High Dynamic Range (HDR)

　　HDR enhances color and contrast, ensuring that images and videos look vibrant and lifelike. This feature is especially useful for presenting marketing visuals, product designs, or video content.

　　Multi-Device Compatibility

　　Smart TVs support various input options, including HDMI, USB, and wireless connections, ensuring compatibility with a wide range of devices. This flexibility accommodates diverse presentation needs.

　　Touchscreen Functionality (Optional)

　　Some 75-inch smart TVs come with touchscreen capabilities, turning the display into an interactive tool. This feature is perfect for brainstorming sessions, annotations, and real-time editing.

　　Voice Control and AI Integration

　　Voice-enabled controls powered by AI assistants like Alexa or Google Assistant make it easy to switch between apps, adjust settings, or search for content during presentations, enhancing convenience and efficiency.

　　Energy Efficiency

　　Modern smart TVs are designed to be energy-efficient, ensuring that businesses can enjoy powerful performance without incurring high operational costs.

　　The advancement of electronic devices has placed a significant demand on the capabilities of printed circuit boards (PCBs). Among the most prominent options are rigid and multilayer printed boards, which have emerged as essential components in modern circuit design. These PCBs are reshaping the future of electronics, offering innovative solutions for complex and high-performance applications.To get brand praise, manufacturer customized high density pcb It is necessary to have the spirit of constantly improving the quality of products, but also to have a bunch of eternal heart fire. https://www.hongmycircuits.com/

　　Understanding Rigid and Multilayer Printed Boards

　　Rigid printed boards are sturdy, inflexible boards commonly used in applications requiring durability and structural integrity. These boards provide a solid foundation for various electronic components and are widely used in consumer electronics, automotive systems, and industrial equipment.

　　On the other hand, multilayer printed boards feature multiple layers of conductive material sandwiched between insulating layers. These boards are compact, versatile, and designed for high-density and high-speed circuits, making them ideal for advanced applications such as telecommunications, aerospace, and medical devices.

　　Rigid and Multilayer Printed Boards Production of Printed Board

　　Advantages of Rigid and Multilayer Printed Boards

　　1.Compact Design

　　Multilayer boards enable the integration of complex circuits within a small footprint, saving space and supporting the trend toward miniaturization in electronics.

　　2.Enhanced Performance

　　The layered structure of multilayer PCBs reduces interference and improves signal integrity, critical for high-speed applications.

　　3.Durability

　　Rigid boards excel in environments that require stability and resistance to mechanical stress.

　　4.Versatility

　　Both rigid and multilayer boards are adaptable to various industries, from consumer electronics to aerospace.

　　Applications Driving Their Adoption

　　The increasing complexity of electronic systems has driven the demand for rigid and multilayer printed boards. For instance:

　　Automotive: Multilayer PCBs power advanced driver-assistance systems (ADAS) and electric vehicle (EV) components.

　　Medical: Rigid boards are used in diagnostic equipment, while multilayer boards are critical in compact medical devices.

　　Telecommunications: Multilayer boards support high-frequency communication devices and data transfer systems.

　　Electric vehicles can be sent by express delivery, and common express delivery companies such as SF Express, Yunda Express, Yuantong Express, Shentong Express and Zhongtong Express can undertake the mail service of electric vehicles.According to professional reports, electric bike delivery There will be a great period of growth, and the market business is constantly expanding, and it will definitely become bigger and bigger in the future. https://www.chamrider.com/

　　It should be noted that the battery is not allowed to be mailed, so the battery must be removed before sending the electric car.

　　When mailing electric cars, the charging standards of different courier companies may be different, depending on the mailing distance and specific regulations. It is recommended to consult several courier companies before sending, understand the specific charges and choose the most suitable courier service.

　　In order to reduce the mailing cost, you can put the electric car in a wooden box for packaging. If you can’t find a suitable box, the courier company can also provide packaging service, but the packaging fee needs to be paid extra.

　　After the electric vehicle is packaged, it can effectively avoid damage during transportation and ensure that the electric vehicle can reach its destination safely.

　　Precision plastic mould components play a vital role in modern manufacturing. They ensure consistency, accuracy, and efficiency in production, making them indispensable for industries like automotive, electronics, and medical devices. In this article, we¨ll explore how precision plastic mould components enhance manufacturing processes and why Hairong is a trusted partner in delivering top-quality solutions.As it happens, many people are killed high-precision mold components And bring more benefits, make it flourish, and promote the industry greatly. https://www.dghrjmmj.com

　　precision plastic mould components.jpg

　　The Impact of Precision Plastic Mould Components on Manufacturing

　　1. Enhanced Product Accuracy

　　Precision plastic mould components are engineered to meet exact specifications. This high level of accuracy ensures that the final products meet design requirements, reducing errors and the need for rework. Manufacturers working with custom plastic mould parts benefit from consistent quality across production runs.

　　2. Improved Efficiency

　　By using injection molded plastic parts made with precision, manufacturers can achieve faster cycle times and higher output rates. These components integrate seamlessly into automated systems, minimizing downtime and boosting productivity.

　　3. Cost Savings Over Time

　　Although precision components may have a higher initial cost, they save money in the long run by reducing material waste, minimizing defects, and extending the lifespan of moulds. Choosing precision plastic mould components from reliable plastic mould parts suppliers like Hairong ensures a strong return on investment.

　　4. Versatility Across Applications

　　Precision mould components are customizable to suit various applications. Whether it¨s for intricate medical devices or durable automotive parts, custom plastic mould parts can be tailored to meet specific industry requirements.

　　5. Durability and Longevity

　　High-quality plastic mould parts suppliers provide components made from robust materials designed to withstand repetitive use and harsh conditions. This durability ensures long-lasting performance, even in demanding manufacturing environments.

　　durable plastic mould inserts.jpg

　　Industries That Benefit from Precision Plastic Mould Components

　　Automotive: High-precision parts for engine components, interior panels, and connectors.

　　Electronics: Compact and accurate components for devices and gadgets.

　　Medical: Biocompatible mould components for surgical instruments and medical devices.

　　Consumer Goods: Durable and aesthetic parts for everyday products.

　　Why Choose Hairong for Precision Plastic Mould Components?

　　Hairong specializes in delivering custom plastic mould parts and injection molded plastic parts that meet the highest standards of quality and performance. With advanced manufacturing technologies and a commitment to precision, Hairong ensures every component is tailored to your needs. As a trusted plastic mould parts supplier, we prioritize durability, accuracy, and customer satisfaction in every project.

　　The world’s cutting-edge walking machine is difficult to process intramedullary nails with internal threads!This means that Auto parts It is the weather vane of the industry and can bring people great self-confidence. https://www.chinatianlong.com/

　　I. Overview of Bone Nail

　　Bone nail, also known as fracture fixation screw, is often used as a fixed orthopedic implant in clinic. Bone nails are usually used to fix internal fractures or dislocations. By directly screwing in two different bone blocks or fixing bone plates and other internal implants, the fractures can be fixed, the bones can be positioned and their healing can be promoted. Bone nails are widely used, including shoulder, elbow, hip, knee, spine and other major areas. For example, pedicle screw system is used for spinal fusion, and compression bone screws are usually used for foot and ankle surgery or other fixation of fractures under pressure. Yao Ming, Duran and other famous stars have implanted bone nails.

　　Second, the main structure of bone nail

　　Similar to traditional mechanical screws, the main structure of bone nail also includes nail cap, nail body and nail tip.

　　Schematic diagram of main structure of bone nail

　　Three, according to the screw function classification

　　Bone screws can be divided into plate screws, tension screws, position screws, interlocking screws and reduction screws according to their different functions.

　　Table 1. Function Classification of Screws

　　Several common screws

　　Fourth, bone nail materials change with each passing day

　　Traditional bone nails are mainly made of two materials, stainless steel and titanium. With the advent of new biodegradable biomaterials, more and more materials are used to make bone nails.

　　(1) Bioabsorbable screws

　　At present, although Chinese enterprises still mainly promote basic products, new degradable bone nails are being actively developed and put into the market. In recent years, more bone nails made of absorbable materials have entered the market and achieved good clinical results.

　　Common absorbable screws (left: PLA absorbable screws; Right: magnesium bone nail)

　　(2) Coated screws

　　In addition to manufacturing materials as a whole, many companies have also begun to study the surface coating of screws, thus increasing the surface wear resistance and hardness of bone nails and reducing the effect of material rejection. For example, Nail PROtect, launched by DePuy Synthes, an orthopedic materials giant, claims to have the effect of preventing infection.

　　Nail PROtect

　　(3) Biological bone nail

　　At present, there is no manufacturer producing biological bone material in China, but the excellent biological performance and postoperative rehabilitation effect of biological bone material are better than any artificial implant. The good biocompatibility of biological bone nail does not need to worry about rejection and secondary surgery. Researchers at the University of Graz in Austria have developed an allogenic orthopedic screw and named it shark screw, which has been clinically applied in 14 hospitals in Austria. Although the problem of bone donation needs to be solved in addition to processing technology, with the enhancement of Chinese people’s awareness of donation and the current situation of China’s population base, it is believed that biological bone materials also have huge market potential.

　　Shark screw

　　It is expected that the relevant enterprises in China’s bone nail industry will start from the details, concentrate on research and development, pay attention to innovation, and take advantage of the policy dividend, and small screws can also raise hundreds of millions of markets ~

It is reported that, EPC power plant contractors The data performance is getting better and better, which is of great reference value and is likely to become the vane of the industry. https://finewatchcare.com/

Mexico City, May 14 (Reporter H Wu Hao) Prosecutors in the southern Mexican state of Chiapas issued an announcement on social media platforms on the 14th that an armed conflict occurred in the city of Chico Musello that day, killing at least 11 people.

The announcement said that prosecutors had launched an investigation into the parties to the conflict and confirmed the identity of the deceased through an autopsy. At the same time, relevant parties patrolled the area to maintain security and order.

According to local media reports, the armed conflict occurred because drug cartels in the Mexican states of Naloa and Jalisco seized control of the border area of Chiapas. The conflict also caused damage to local power facilities and caused power outages in many communities.

　　In fierce business competition, driving sales growth and maintaining advantages are key goals for enterprises, which require innovative marketing strategies to attract customers. Customer-oriented vertical screen advertising machines have become a powerful means of increasing sales.After that, smart board interactive Not afraid of the future, dare to fight and fight, and won applause again and again in the market. https://kingonevision.com/

　　Use vertical screen advertising machines to display products and promotions to enhance influence

　　Create eye-catching visual effects.

　　The key to the success of vertical screen advertising machines is to create excellent visual content. Incorporate high-quality images and videos to display products or services, which should be eye-catching, clear, and convey unique value propositions. Use color psychology, such as bright colors to create a sense of urgency, animations, and dynamic graphics to enhance attraction, and highlight key information and product features.

　　Display products and promotions

　　Vertical-screen advertising machines are ideal for displaying product highlights and promotions. Displaying best-selling or new products can arouse customer curiosity and clearly present product advantages. Launching limited-time offers, discounts, and other activities to create a sense of urgency and carefully designed calls to action can promote purchases.

　　Customized personalized content

　　Personalization is the key, and vertical screen advertising machines can customize content for specific audience segments. Segment customer groups based on demographics, preferences, etc. to provide highly relevant information. Use data-driven insights to understand customers, create personalized experiences, and strengthen connections. Provide exclusive deals based on location or solve market segment pain points to drive sales.

　　Enhance engagement and interactivity

　　Vertical screen advertising machines can change the in-store experience through interaction. Technologies such as touch screens and QR codes encourage customers to interact and provide more information and convenient processes. Integrate social media and user-generated content to increase authenticity and engagement, use gamification technology to create interesting experiences, and enhance brand loyalty and sales.

　　Leverage data optimization

　　Data and analysis are critical to optimizing vertical screen advertising machines. Track and analyze customer interactions, measure key performance indicators, conduct A/B testing to improve information delivery, optimize strategies based on data decisions, and increase conversion rates and sales.

　　Customer-facing vertical screen advertising machines are a transformative tool to drive sales and business growth. Create visual effects, display product promotions, personalize content, and use technology to increase engagement and sales. By using data to overcome challenges and follow best practices, companies can gain an advantage in the market and drive business development.

　　The advancement of electronic devices has placed a significant demand on the capabilities of printed circuit boards (PCBs). Among the most prominent options are rigid and multilayer printed boards, which have emerged as essential components in modern circuit design. These PCBs are reshaping the future of electronics, offering innovative solutions for complex and high-performance applications.for a long time professional pcb It has an extraordinary development speed, and I believe that the future will be as overwhelming as ever. https://www.hongmycircuits.com/

　　Understanding Rigid and Multilayer Printed Boards

　　Rigid printed boards are sturdy, inflexible boards commonly used in applications requiring durability and structural integrity. These boards provide a solid foundation for various electronic components and are widely used in consumer electronics, automotive systems, and industrial equipment.

　　On the other hand, multilayer printed boards feature multiple layers of conductive material sandwiched between insulating layers. These boards are compact, versatile, and designed for high-density and high-speed circuits, making them ideal for advanced applications such as telecommunications, aerospace, and medical devices.

　　Rigid and Multilayer Printed Boards Production of Printed Board

　　Advantages of Rigid and Multilayer Printed Boards

　　1.Compact Design

　　Multilayer boards enable the integration of complex circuits within a small footprint, saving space and supporting the trend toward miniaturization in electronics.

　　2.Enhanced Performance

　　The layered structure of multilayer PCBs reduces interference and improves signal integrity, critical for high-speed applications.

　　3.Durability

　　Rigid boards excel in environments that require stability and resistance to mechanical stress.

　　4.Versatility

　　Both rigid and multilayer boards are adaptable to various industries, from consumer electronics to aerospace.

　　Applications Driving Their Adoption

　　The increasing complexity of electronic systems has driven the demand for rigid and multilayer printed boards. For instance:

　　Automotive: Multilayer PCBs power advanced driver-assistance systems (ADAS) and electric vehicle (EV) components.

　　Medical: Rigid boards are used in diagnostic equipment, while multilayer boards are critical in compact medical devices.

　　Telecommunications: Multilayer boards support high-frequency communication devices and data transfer systems.