The length of the lead-in wire is determined by the material thickness and the cutting method used. Generally, as the material becomes thicker, the lead-in length increases to ensure smooth cutting and prevent damage at the start point. When cutting steel plates with a CNC cutting machine, it's essential to avoid starting the cut directly on the part’s contour line. For outer contours, the cut should begin outside the part, while for inner contours, it should start inside. This starting point is known as the lead-in line, which is placed on an extra cut line to ensure the integrity of the final shape.
When the remaining part is an outer contour, the lead-in should be inside the contour; if it's an inner contour, the lead-in should be outside. Additionally, during the design phase, it's important to consider material loss. The lead-in position should be chosen in a way that minimizes waste, ideally near edges or corners. The lead-in length varies depending on the material type, thickness, and cutting energy, but it typically ranges between 1 mm and 10 mm. The exact placement of the lead-in line depends on the specific part being cut.
CNC Equipment Co., Ltd. Shanxi Hua Heng will provide detailed guidance on how to properly set up the lead-in when using a CNC cutting machine. Here are some key considerations:
1. **Straight Lead-In**: This is the most commonly used type, especially in practical applications. However, it may leave small marks or tails at the start and end of the cut. For square inner cavities, it's common to introduce the lead-in from an angle, while circular cavities usually don’t require this.
2. **Round Lead-In**: If a higher-quality cut is needed, a round lead-in is recommended. It helps reduce visible marks and ensures a smoother transition.
3. **Lead-In for Shape Cutting**: When cutting a workpiece’s outline, a straight lead-in is generally preferred.
4. **Lead-In for Inner Cavities**: For inner cavities, the lead-in must be carefully positioned to avoid affecting the final shape and quality.
5. **Material Waste Consideration**: The lead-in design should aim to minimize material waste. Sometimes, nesting techniques are used to optimize the layout.
6. **Optimal Lead-In Length and Direction**: The lead-in should be as short as possible without compromising the cutting process. The direction should align with the cutting path to prevent debris from flying toward the cutter. Instead, the slag should be directed away from the starting point.
Depending on the application—whether for welding or further machining—the user can choose between a slight over-burn, leaving a small tail, or a nearly smooth cutting point. Some modern CNC cutting systems, such as the SH2200 series, offer lead-in compensation features that help reduce burn marks and improve cut quality. These functions are particularly useful in achieving cleaner and more professional results.
The hot gas bypass valve is a valve that automatically regulates the cooling temperature in the dryer exchanger based on the refrigerant pressure. The pressure measured after the heat exchanger directly correlates to the temperature in the system. A low pressure means there will be a low temperature.
Hot Gas Bypass Valve, Hot Gas Bypass Valve Refrigeration, Discharge Hot Gas Bypass Valve
NINGBO BRANDO HARDWARE CO.,LTD , https://www.brandopneumatic.com