Analysis and Preventive Measures for Ferrule Grinding Burns (2)
Source: Bearing Network | Time: 2013-02-13
In the process of flat grinding, such as when using a vertical single-head grinding machine to grind a plane, even if all operating standards are followed, several factors can still lead to surface burns. Understanding these causes and taking preventive measures is crucial for maintaining product quality. One common issue is the vibration of the grinding wheel shaft. If the shaft becomes unstable, especially during heavy cutting, it can result in burning. To resolve this, the wheel axle bearings should be tightened or replaced if necessary. Another cause may be uneven rotation of the worktable. If the table's movement is inconsistent or the disk jumps, it can lead to excessive grinding pressure, causing damage. In such cases, the reducer components—like the worm gear or worm—should be inspected and repaired or replaced if worn. A weak or broken magnetic force on the table can also lead to workpiece slippage, which results in burns. Adjusting the charging and demagnetizing circuits can help restore proper function. Additionally, improper positioning of the reciprocating stroke can cause issues. If the stroke switch is not properly engaged or the reducer assembly is worn, the system may not lock correctly, leading to impacts that cause burns. This is particularly common in double-face surface grinders like the M7675 series, where misalignment of the guide plate or feeding system can contribute to the problem. For centerless cylindrical grinding machines, such as the M1083 model, certain conditions are more likely to cause burns. For example, improper infeed adjustments, worn guide plates, or incorrect spark settings can lead to overheating and surface damage. Ensuring the guide plate is parallel to the grinding wheel and adjusting the feed mechanism accordingly is essential. In internal grinding operations, such as with the MZ208 series, the long contact arc between the grinding wheel and the workpiece can create high temperatures. Poor coolant flow and inadequate wheel maintenance can worsen the situation. Regular wheel dressing and sufficient coolant supply are critical to prevent burns. Some machines now use stepper motor systems instead of roller friction for better compensation accuracy. When grinding with an oscillating head, the self-sharpening ability of the grinding wheel is important. Rubber-bond wheels are commonly used but can become brittle under high heat, leading to abrasive grain loss. Keeping the wheel sharp and ensuring good coolant flow is essential. Harder wheels, often used in cutting applications, require frequent dressing and uniform rotation speed for optimal performance. Proper setup and maintenance of the grinding system, including sharp diamond tools and stable dressing speeds, play a key role in preventing burns. A well-maintained system ensures consistent results and reduces the risk of defects.
Related Bearing Knowledge: - Analysis of Bearing Maintenance Methods - Causes and Solutions for Bearing Failure in 5M1083A Centerless Grinders - NTN Bearing Installation and Adjustment Guidelines - Introduction to Cement Mill Main Bearings - Features of Imported Spherical Roller Bearings This article is from China Bearing Network. Link: http:// Please cite the source: http:// Previous: The Common Defects in Bearing Grinding Processes Next: TORRINGTON Bearing Code Explanation (1)
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