1.
A wide-body light passenger project is a project that is completely designed based on data and utilizes the advantages of accurate digital data, fast modifications, and seamless interface with structural design. It seamlessly integrates shape, structure, and digital modeling throughout the project process. By introducing stages of structural feasibility analysis, the project achieves the goals of structural feasibility and satisfactory modeling, and releases the final design in the form of data. The inspection of the appearance CAS digital analog CheckList at each stage is extremely important. This article aims to provide an in-depth analysis of the rear door hinge design.
2. Rear door hinge axis arrangement:
The core focus of the opening motion analysis lies in the hinge axis layout and hinge structure determination. To meet the requirements of opening the rear door 270 degrees, the hinge must be flush with the CAS surface and have a suitable inclination angle. The following steps outline the analysis process:
a. Determine the Z-direction position of the lower hinge, which considers the space for reinforcement plate arrangement and welding process size.
b. Arrange the main section of the hinge based on the Z direction of the lower hinge and determine the four-axis positions of the four-linkage system.
c. Determine the inclination angle and forward inclination of the four axes using the method of conic intersection.
d. Determine the position of the upper hinge based on the distance between the upper and lower hinges.
e. Arrange the main sections of the upper and lower hinges in detail, considering manufacturability, fit clearance, and structural space of the four-bar linkage mechanism.
f. Perform DMU movement analysis to analyze the back door's movement and check the safety distance during the opening process.
g. Adjust the parameters of the hinge axis inclination angle, forward inclination angle, connecting rod length, and distance between the upper and lower hinges to analyze the opening feasibility of the rear door. If adjustments are unsuccessful, the CAS surface needs to be modified.
3. Rear door hinge design scheme:
The rear door hinge adopts a four-bar linkage mechanism. Due to the adjustment in shape, three design options are proposed:
3.1 Scheme 1: Ensures alignment with the CAS surface and parting line, but has disadvantages in terms of appearance and structural risks.
3.2 Scheme 2: Protrudes the hinges outwards to eliminate gaps with the rear door in the X direction and provides structural advantages.
3.3 Scheme 3: Matches the outer surface of the hinges with the CAS surface but has a large gap between door links.
After a comparative analysis and discussions with modeling engineers, it is determined that the third scheme is the optimal solution.
4. Summary:
Designing the hinge structure requires considering various factors such as structure, shape, and optimization. The forward design approach in the CAS design stage allows for meeting structural requirements while maintaining a high-quality appearance. The third scheme is chosen to minimize changes to the outer surface, ensuring consistency in the modeling effect. AOSITE Hardware is committed to continuous improvement in product quality and applies the craftsman spirit to manufacturing. With a focus on R&D, AOSITE Hardware has become a leading tool manufacturer in the industry.

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When it comes to purchasing wooden doors, there is often a lack of attention given to hinges. However, hinges play a crucial role in the functionality and convenience of wooden doors. The type and quality of hinges determines how smoothly the door opens and whether it squeaks or not.
There are two main types of hinges for household wooden doors: flat hinges and letter hinges. For wooden doors, the emphasis is on flat hinges. It is recommended to choose a flat hinge with a ball bearing in the middle of the shaft. This reduces friction at the joint of the two hinges, ensuring a smooth and silent opening of the door. It is not advisable to choose "children and mothers" hinges for wooden doors, as they are designed for lighter doors like PVC doors and can compromise the structural integrity of wooden doors.
When it comes to the material and appearance of hinges, stainless steel, copper, and stainless iron/iron are commonly used. For household use, it is recommended to opt for 304# stainless steel hinges, as they are durable and resistant to rust. It is best to avoid inexpensive options like 202# "immortal iron" hinges, as they tend to rust and require expensive and troublesome replacements. Additionally, it is important to use matching stainless steel screws for the hinges, as other screws may not provide the same level of durability. Pure copper hinges are suitable for luxurious original wooden doors, although they may not be cost-effective for general household use.
The current electroplating technology allows for various colors and appearances for stainless steel hinges, making them compatible with different styles of wooden doors. The brushed appearance is particularly recommended for its environmental friendliness and the reduction of pollution associated with electroplating.
When it comes to the specification and quantity of hinges, the length, width, and thickness are important factors to consider. The specification of hinges is typically measured in inches for length and width, and in millimeters for thickness. Household wooden doors usually require a 4" or 100mm long hinge, with the width determined by the door's thickness. For a door with a thickness of 40mm, a 3" or 75mm wide hinge is recommended. The thickness of the hinge should be based on the weight of the door, with lighter doors requiring a 2.5mm thick hinge and solid doors requiring a 3mm thick hinge.
The length and width of hinges may not always be standardized, but the thickness is the most critical factor. It is advisable to measure the thickness of the hinge with a caliper to ensure its strength and quality. The thickness also indicates whether the hinge is of high-grade stainless steel.
The number of hinges to install depends on the weight and stability of the wooden door. Light doors can typically be supported by two hinges, while heavier wooden doors may require three hinges for added stability and to prevent deformation of the door.
The installation of hinges can follow different styles, such as the German style or the average score American style. The German style involves installing hinges in the middle and on the top, providing stability and better force distribution on the door. The American style suggests installing hinges evenly, enhancing aesthetics and minimizing the impact of door deformation.
In conclusion, hinges play a crucial role in the functionality and longevity of wooden doors. It is important to pay attention to the type, material, appearance, specification, and installation of hinges when purchasing wooden doors. AOSITE Hardware is a leading manufacturer dedicated to providing high-quality hinges and excellent service to customers. Their products are innovative, environmentally friendly, and durable, making them a reliable choice for those in need of hinges for wooden doors.

Door Hinges: A Historical Evolution
Door hinges are an important device that connects doors and door frames. Their history can be traced back to ancient civilizations. With the changes of the times, the shape, materials and uses of door hinges have also changed significantly. This article will provide a brief overview of the historical evolution of door hinges.

ancient times

In China, the earliest use of door hinges was in the Shang Dynasty. Most of its hinges were in the shape of animals or birds, which were highly decorative. By the Qin and Han Dynasties, door hinges had gradually developed into more practical copper products, and began to adopt axis fixing methods. During the ancient Greek and Roman periods, door hinge manufacturing technology also improved, and cast iron hinges were used.

middle Ages

In medieval Europe, door hinges also developed rapidly. Due to the construction of the city wall, gates on the city wall gradually appeared, which also promoted the development of door hinges. During this period, door hinges were made from a wider variety of materials, including low-cost metals and alloys such as copper, iron, brass, tinplate, and aluminum.

Industrial Revolution

With the rise of the Industrial Revolution, the production of door hinges began to be large-scale and new manufacturing techniques were adopted. In the early 19th century, expanded copper alloy door hinges came into use. It is relatively lightweight, sturdy, and corrosion-resistant and durable. Later, door hinges made of other materials appeared, such as hardened steel hinges, high-strength alloy door hinges, etc., to meet the needs of different occasions.

modern period

Door hinges in the 21st century have become a high-tech product that can be used in a variety of environments. Today's door hinges not only require easy opening and closing but also must be able to withstand greater pressure and load. In addition, special functions such as fire resistance, wear resistance, anti-theft and anti-freezing have also appeared one after another. Currently, the most common door hinge materials on the market include aluminum alloy, stainless steel, copper, and plastic.

in conclusion

As the times change, the functions and forms of door hinges are constantly changing, and they continue to adapt to new environments and needs. The development of modern production technology has greatly improved the quality and efficiency of door hinges. It can be said that the historical evolution of door hinges is constantly providing better conveniences for our lives. In the future, door hinges will also demonstrate their capabilities and value in more aspects.



Door Hinge Buying Guide
As an important component commonly used in decoration materials, the purchase of door hinges is not only related to the opening and closing of doors and windows but also to the stability and safety of doors and windows. There are various door hinge brands and types on the market. How to choose the door hinge that suits your doors and windows?

1. Choose door hinges based on the functions of doors and windows.

Different doors and windows have different usage environments and requirements, so you need to choose door hinges that suit your own doors and windows. The usage functions of doors and windows mainly include door and window material, door and window weight, door and window size, and frequency of use. For example, the more popular door and window materials include solid wood doors, steel doors, aluminum alloy doors, etc. Doors and windows of different materials require the purchase of door hinges of different textures; the weight of doors and windows is also an important factor to consider when purchasing door hinges; the size of doors and windows The frequency of use also determines how many door hinges you need to purchase.

2. Choose a door hinge brand with reliable quality

The quality of door hinges directly affects the service life and safety of doors and windows, so it is very important to choose a brand with reliable quality. Currently, the more reputable brands on the market include German Häfele, Italian Ferrari, etc. The quality of door hinges of these brands is very reliable, and the after-sales service is also very good.

3. The types of door hinges should match

There are many types of door hinges on the market, and different types of door hinges are suitable for different types of doors and windows. For example, steel-wood doors require the purchase of special door hinges for steel-wood doors, while glass doors require special door hinges for glass doors. When purchasing door hinges, be sure to match the type of door and window to ensure the stability and safety of the door and window.

4. Pay attention to the installation method and service life of door hinges

The installation method of door hinges directly affects the use effect of doors and windows. Different installation methods are suitable for different doors and windows, such as flat installation and die-cast installation. If you are not familiar with how to install door hinges, you can entrust a professional installer to install them. In addition, the lifespan of door hinges also needs to be paid attention to. Door hinges of different brands and models have different lifespans. You need to choose the door hinge that suits you according to the actual situation.



In short, when purchasing door hinges, you must comprehensively considerIn short, you must comprehensively consider the functions of the door and window, the brand quality of the door hinge, the type selection and installation method of the door hinge, etc., to choose the door hinge that suits your door and window. This will not only ensure the stability and safety of doors and windows but also improve the comfort and lifespan of doors and windows, bringing more convenience to your life. When selecting a door hinge manufacturer, it is important to choose one with a good reputation for producing high-quality products.