The aviation equipment manufacturing industry is a technology-intensive, high-end sector. It not only reflects a nation's comprehensive strength but also represents the pinnacle of industrial technological capability. Its development level is a crucial indicator of a country's economic, technological, scientific research, and modern industrial prowess.

In recent years, with the successful entry of COMAC (Commercial Aircraft Corporation of China) into domestic and international markets, China's aerospace industry has entered a new phase of scaled development. According to The Paper, domestically developed large aircraft are progressing steadily along the path of "Chinese design, system integration, global procurement, and gradual enhancement of localization." It is estimated that by 2026, the number of local supporting suppliers and partners in the large aircraft industrial chain will reach around 150, with the large aircraft industry scale reaching approximately 80 billion RMB. China's aviation equipment manufacturing is truly beginning to compete at the international top tier.

In terms of aviation equipment manufacturing, China's airframe manufacturing technology has reached a highly precise and automated level. The performance, reliability, and economic efficiency of aero-engines have significantly improved, while the research and development technology for airborne equipment continues to innovate and refine. The localization of complete aviation equipment manufacturing has entered the critical stage of "gradually enhancing localization," urgently requiring focused efforts to improve the resilience and security level of the large aircraft industrial chain.

Aviation Connectors: The Triple Test of High Precision, Reliability, and Stability

Within a large aviation avionics system, numerous sub-modules require dense data exchange. The interconnection between these subsystems relies on connectors and cables. Therefore, as one of the most widely used electronic components in aerospace, the importance of connectors is self-evident. Especially when facing harsh environments like corrosion, interference, vibration, and pressure differentials at varying altitudes, along with potential unforeseen circumstances, the demanding requirements for reliability and protection levels are paramount for these structurally precise components.

The assembly of aviation connectors requires special adhesives and imposes extremely high demands on the dispensing process for the connector housing. It requires not only precision but also flawlessness to ensure the physical structural integrity and high hermeticity of the finished connector. This necessitates the use of high-precision piezoelectric valves to achieve micro-dispensing of various specifications that meet the connector's technical requirements.

Quark's High-Precision Piezoelectric Jet Valve: The All-Rounder for Precision Dispensing

The customer is a high-tech enterprise specializing in aviation connectors, providing interconnect solutions for aviation, defense, and high-end manufacturing, and is a designated supplier of connectors for domestically produced large aircraft.

Driven by considerations for aviation safety and reliability, along with an extreme pursuit of quality, the customer imposed exceptionally stringent and detailed requirements on the process. They were extremely cautious regarding the performance, quality, and process considerations of the piezoelectric valve—a critical production component for the connectors. The customer conducted multiple rounds of testing on various performance aspects including speed, accuracy, stability, and dispensing results.

Ultimately, the stable performance of Quark's piezoelectric valve, coupled with Quark Research Institute's meticulous one-stop technical R&D and production services and superior solution design capabilities, passed rigorous tests, earning the customer's preference and trust. They chose to implement the DOT V20 High-Precision Piezoelectric Jet Valve for dispensing two-part epoxy adhesive in optical connector cover assembly.

Connector Dispensing Process Requirements:

• Dispensing two-part adhesive onto the housing of an optical-electrical connector, requiring precise proportional mixing.

• Consistent and uniform adhesive output.

• Required adhesive line width <0.3mm.

• Complete coverage of the designated frame area without breaks to ensure hermetic sealing.

• No adhesive spillover into adjacent optical apertures outside the frame, to avoid affecting communication.

• Uniform adhesive lines, free from waviness or锯齿状 (serrated) edges, ensuring physical structural reliability.

Leveraging years of accumulated manufacturing experience and process expertise, Quark Research Institute collaborated closely with the customer on this highly complex dispensing project, conducting comprehensive optimization of the structure and functional parameters of key components. Its independently developed piezoelectric valve demonstrated significant effectiveness in resolving the aforementioned issues.

• Nano-liter (10⁻⁶ ml) level micro-fluidic control, achieving line width accuracy of 0.2-0.3mm.

• Maximum jetting speed of 1000 times/second ensures efficient dispensing.

• Advanced heating components enhance adhesive flowability, improving dispensing efficiency.

• Precise temperature control prevents adhesive curing inside the valve, ensuring high yield rates.

• Leading valve control logic guarantees uniform adhesive lines, free from breaks, insufficient adhesive, or overflow.

• Long-term stability supporting no less than 600 million stable dispensing cycles, ensuring process yield and consistency.

The assembly and production of aerospace connectors have subjected domestic dispensing processes to a comprehensive, high-standard examination. Quark's High-Precision Piezoelectric Jetting System, with its advantages of high precision, high stability, and independent R&D, supports the advancement of aerospace connector manufacturing processes. It contributes to jointly propelling the new phase of industrial and scaled development for domestically produced large aircraft.