First, The Networking Development Trend of Valve Machine Tools

The networking of CNC systems primarily refers to the network connectivity and control between CNC systems and external control systems or upper-level computers. Recent research and development in production concepts such as digital manufacturing (also known as "e-manufacturing") and networked manufacturing are closely tied to the networking of CNC systems.

The networking of CNC systems has further advanced the development of flexible automated manufacturing technologies. Modern flexible manufacturing systems (FMS) have evolved from isolated units (standalone CNC machines, machining centers, and CNC composite machining tools) and linear configurations (FMC, FMS, FTL, FML) to planar systems (workshop-level independent manufacturing islands, FA) and three-dimensional frameworks (CIMS, distributed network-integrated manufacturing systems). Flexible automation technologies aim to enhance network compatibility and integration while strengthening the innovation and refinement of modular technologies. Valve machine tools and their flexible manufacturing systems can seamlessly integrate with CAD, CAM, and MTS, driving progress toward information integration, openness, and intelligence.

The networking of CNC systems is also evident in remote monitoring and diagnostics. When a CNC system malfunctions, manufacturers can use the Internet to rapidly diagnose and service the user’s system, significantly reducing maintenance guesswork and improving equipment reliability. This meets user demands for remote fault monitoring, diagnosis, and repair of valve machine tools. For instance, Tianjin University’s remote monitoring and diagnostics network has already been implemented.

CNC system networking also enables remote operation and training. By sharing CNC machining tools over a network—similar to shared printers in an office network—it fulfills the requirements of industries needing remote equipment operation (e.g., forming processes after rocket engine propellant loading) and remote training.

Additionally, networked CNC systems provide large-capacity storage and resource sharing. Most existing CNC systems in China have limited memory, lack network functionality (relying only on low-speed DNC interfaces), and lack large-capacity storage devices (e.g., hard drives). However, large and complex mold machining programs often exceed 1MB in size. Networked CNC systems can meet the demands of high-speed LANs for high-volume data communication and file exchange between CAD/CAM systems and CNC systems.

Since the 1980s, despite fluctuations in China’s machine tool industry, significant attention has been paid to CNC technology and valve machine tools, resulting in strong market competitiveness. However, mid- to high-end valve machine tools still lag behind advanced international products and technologies, with most remaining in a technological catch-up phase.

Second, Classification of Common Hydraulic System Failures in Valve Drilling Machines

The hydraulic system of valve drilling machines integrates mechanical, electrical, and hydraulic components, and failures can arise from various causes.

Effective fault diagnosis requires both theoretical knowledge (understanding hydraulic principles and component structures/performance) and practical experience to swiftly identify issues. Thus, classifying hydraulic system failures and characterizing their features is critical. Failures in valve drilling machine hydraulic systems are typically categorized by:

1. Indication Type:

• Failures without alarms.

• Failures with alarms.

2. Failure Nature:

• Random failures (unpredictable occurrences).

• Deterministic failures (predictable causes).

3. Symptoms:

• Overheating.

• Noise.

• Vibration.

• Pressure regulation failure.

• Insufficient pressure.

• Increased pressure loss or fluctuations.

• Abnormal speed (too slow/fast).

• Incorrect movement direction or failure to actuate.

• Delayed startup or significant load speed reduction.

• Motion-related failures:

• Pressure-related failures:

• Other failures:

This systematic classification aids in efficient troubleshooting and maintenance of hydraulic systems.