Turning inserts are vital components in CNC turning machines, used to cut and shape workpieces with precision. Alongside the inserts themselves, the turning holders also play a crucial role in ensuring smooth and accurate machining. In this article, we’ll explore the key aspects of turning insert holders, focusing on their coding system and clamping mechanisms.
Holder Coding System: Turning insert holders are assigned specific codes that provide important information about their design and functionality. These codes typically include details such as the method of insert fixation, the insert shape, and the holder’s lead angle. The exact format of these codes may vary depending on the manufacturer or industry standard. For instance, in many systems, the first character of the code indicates the type of insert fixation. Common examples include "S" for screw clamping, "D" for rigid clamping, "M" for top wedge lock, and "P" for lever lock. Choosing the right fixation method depends on factors like cutting forces, machine accessibility, and the nature of the operation.
Clamping Methods Explained: There are several clamping methods used in turning insert holders, each with its own advantages and applications. One of the most common is screw clamping ("S"), which is typically used for positive inserts with non-zero clearance angles. While it may not be the strongest option, it offers a compact design and good access, making it ideal for internal machining or operations with lower cutting forces.
Rigid clamping ("D") is another widely used method. It involves inserting a pin through the insert hole and pushing it down to secure the insert. This method provides strong holding power but may not be suitable for internal or boring operations due to its larger size. In high-force applications like roughing, some holders use shims made from hard materials to distribute pressure evenly and prolong the life of the holder. These shims are easy to replace when damaged.
Other clamping techniques include top wedge lock ("M") and lever lock ("P"), both of which offer reliable performance. Some manufacturers also develop their own unique clamping systems tailored to specific needs.
Matching Insert Shape and Holder Code: The second character in a holder code usually represents the insert’s shape. This should match the first character of the insert code to ensure compatibility. For example, an insert with a rhombus shape and an 80-degree angle might have the code "C" as its first character. Therefore, the holder’s second character must also be "C" to allow proper fitting and effective performance during machining.
Holder Lead Angle: The third character in the holder code typically indicates the lead angle or approach angle of the tool. This angle determines how the cutting edge interacts with the workpiece. Different characters represent different angles according to the standard being used. For instance, a 93-degree lead angle might be denoted by the letter "J" in the code.
Conclusion: Turning insert holders are essential for maintaining stability, accuracy, and efficiency in CNC turning operations. Understanding their coding system and clamping options helps in selecting the right holder for specific tasks. By matching the insert shape, considering the clamping method, and evaluating the lead angle, machinists can optimize performance and achieve better results in their turning processes. Whether you're working on internal cuts, heavy-duty roughing, or precision finishing, choosing the correct holder is key to success in modern machining environments.
Sight Glass ,level gauge, sight tube,Refrigeration System Sight Glass
SUZHOU YOUDE ELECTRIC CO., LTD. , https://www.unitekool.com