
Lost Wax Casting Of Titanium Alloy Door Lock Lever
The door lock lever needs to withstand certain external forces during daily use, such as tension and torque when opening and closing the door lock. Titanium alloy has high strength, which can ensure that the lever is not easily deformed or damaged during long-term use, ensuring the normal use function of the door lock.
Analysis Of The Reasons For Choosing Titanium Alloy As The Material For The Door Lock Lever
High strength
The door lock lever needs to withstand certain external forces during daily use, such as tension and torque when opening and closing the door lock. Titanium alloy has high strength, which can ensure that the lever is not easily deformed or damaged during long-term use, ensuring the normal use function of the door lock. For example, in frequent door opening and closing operations, ordinary metal levers may bend due to stress, affecting the smoothness of door lock opening, while titanium alloy levers, with their high strength, can better resist this deformation.
Low density
Compared to some traditional metal materials such as steel and titanium alloys, the density is lower. This makes the door lock lever lighter in weight while ensuring strength. A lighter lever has a positive impact on the overall design and installation of the door lock. On the one hand, it can reduce the overall weight of the door lock and lower the difficulty of installation; On the other hand, during use, users can operate more easily and conveniently, reducing the burden on their hands.
Corrosion resistance
Door locks are typically installed in various environments and may be susceptible to corrosion from humid air, rainwater, chemicals, and other factors. Titanium alloy has excellent corrosion resistance and can maintain good condition for a long time under harsh environmental conditions, making it less prone to rusting or corrosion. This not only extends the service life of the door lock lever, but also ensures its aesthetic appearance, avoiding problems such as surface peeling and discoloration caused by corrosion.
Application analysis of lost wax casting process in the manufacturing of door lock lever
The lost wax casting process can achieve very high dimensional and shape accuracy. The door lock lever usually has complex shapes and intricate structures, such as unique design and precise coordination with other components of the door lock. By lost wax casting, the shape of the mold can be accurately replicated to ensure that the size and shape of the lever meet the design requirements. This is crucial for ensuring the assembly accuracy and performance of the door lock, enabling the lever to perfectly match with other components of the door lock and achieve smooth operation.
The door lock lever manufactured using lost wax casting technology has a high surface finish and does not require excessive subsequent processing. Good surface quality not only enhances the aesthetic appearance of the lever, but also reduces surface defects and roughness, lowers frictional resistance between the door lock and other components during use, and improves the operating feel and service life of the door lock. At the same time, a smooth surface is also easier to clean and maintain, keeping the door lock clean and hygienic.
Lost wax casting is a near net forming process, where material loss is relatively small during the casting process. For materials with high costs such as titanium alloys, improving material utilization can effectively reduce production costs. Through precise mold design and casting process control, the generation of waste can be minimized to the greatest extent possible, allowing more titanium alloy materials to be effectively utilized in the manufacturing of door lock levers, improving production efficiency and economic benefits.
Production process analysis of wax loss casting of titanium alloy door lock lever
Wax mold production: First, make a mold based on the design drawings of the door lock lever, and then inject wax into the mold to create a wax mold with the same shape as the door lock lever. In this process, it is necessary to strictly control the temperature, injection pressure, and time of the wax material to ensure the dimensional accuracy and surface quality of the wax mold. At the same time, in order to facilitate subsequent casting operations, process accessories such as gates and risers need to be installed on the wax mold.
Shell making: Place the made wax mold into a special coating for immersion coating, so that the surface of the wax mold is evenly covered with a layer of coating. Then sprinkle a layer of refractory sand on the surface of the coating, wait for the coating to dry, and then perform multiple immersion and sanding operations to form a certain thickness of shell. The quality of the shell directly affects the quality of the final casting, so it is necessary to control the formulation of the coating, the number of immersion coatings, and the drying time to ensure that the shell has sufficient strength and breathability.
Dewaxing: Place the wax mold with a mold shell into a steam dewaxing kettle or hot water to melt the wax material and flow out of the mold shell, thereby forming a cavity inside the mold shell with the same shape as the door lock lever. During the dewaxing process, it is important to control the temperature and time to avoid cracking or deformation of the shell. After dewaxing, the shell needs to be cleaned and dried to remove residual wax and impurities.
Melting and pouring: Place titanium alloy raw materials into a vacuum induction furnace for melting. During the melting process, it is necessary to strictly control parameters such as temperature, vacuum degree, and melting time inside the furnace to ensure that the chemical composition and purity of the titanium alloy meet the requirements. When the titanium alloy reaches the appropriate pouring temperature, it is injected into the preheated shell. The pouring process should be rapid and smooth to avoid defects such as porosity and slag inclusion.
Cooling and cleaning: After pouring is completed, let the shell cool naturally to allow the titanium alloy to solidify and form inside the shell. After the casting cools to a certain temperature, break the shell and remove the casting. Then clean the casting to remove excess parts such as surface shell residue, sprues, and risers. Finally, the casting is subjected to surface treatments such as grinding and polishing to achieve the required surface quality and appearance requirements for the door lock lever.
Analysis of Challenges and Solutions for Wax Loss Casting of Door Lock Pulling Rod Titanium Alloy
Titanium alloys have high chemical reactivity and are prone to react with elements such as oxygen and nitrogen in the air during the melting process, which can affect the properties of the alloy. To solve this problem, advanced melting techniques such as vacuum induction melting need to be adopted, and the vacuum degree and atmosphere inside the furnace should be strictly controlled during the melting process to avoid contact between titanium alloy and harmful elements. At the same time, suitable melting equipment and process parameters should be selected to ensure that the titanium alloy can be fully melted and uniformly mixed.
Titanium alloy will undergo chemical reactions with the mold shell material at high temperatures, resulting in defects such as sand adhesion and cracks on the surface of the casting. In order to improve the compatibility between the shell and titanium alloy, it is necessary to select suitable shell materials and perform special treatment on the shell. For example, a layer of isolation layer can be coated on the surface of the shell to prevent direct contact between the titanium alloy and the shell material. In addition, it is necessary to optimize the preparation process of the shell and improve its high-temperature strength and chemical stability.
Titanium alloy materials themselves are expensive, and the wax loss casting process is relatively complex, resulting in high production costs for door lock levers. To reduce costs, we can start from multiple aspects. On the one hand, optimizing material procurement channels and reducing the procurement cost of titanium alloy raw materials; On the other hand, improving the casting process, increasing production efficiency, and reducing scrap rates. At the same time, reasonable design and process improvement can also reduce subsequent processing steps and lower processing costs.





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