What is grinding crack generation and solution?

Introduction

Grinding is a machining process that uses abrasive particles to generate cutting action on the workpiece surface. Grinding can be divided into two types: dry grinding and wet grinding. The grinding method used determines the type of crack generated during the process.

Grinding is caused by the relative movement of the two parts.

Grinding is caused by the relative movement of the two parts. That is, when a grinding wheel is carrying out work on a workpiece, each part of the workpiece is not stationary but moves relative to each other in accordance with the rotation of the grinding wheel.

When grinding, there will inevitably be some relative motion between them. The more rapid these movements are and larger they are, then more severe will be its effect on generating cracks. This type of generation mechanism can only occur when a large amount of external stress (such as pressure) acts on it for example grinding stress at high speed with large amplitude or impact load during roughing operation etc., so that local temperature rises rapidly above Tg (glass transition temperature) which leads to localized softening and plastic deformation causing cracks.

The grinding crack is generated when the grinding stress reaches a certain value, the grinding stress is higher than the critical grinding stress.

When the grinding stress is higher than the critical grinding stress, a crack will occur on the workpiece. The critical grinding stress is determined by the hardness of materials and other factors in different ways. For example, when we grind a piece of steel with hardness HV100 and fine powder (F100), we need to calculate according to formula:

HV100-F100=HLT100

where HLT100 means high level tolerance of 100 points; that is, F100=0

Crack formation requires that there are three factors: indentation, plastic deformation and tensile stress.

To understand crack generation, we need to know three factors: indentation, plastic deformation and tensile stress.

• Indentation: The first is being pressed on the ground, which will cause the surface of the material to be compressed or bent. This phenomenon is called indentation. This compression or bending will have a certain amount of strength, so if you don't go too far with it, it won't cause any damage to your product; however, if you apply too much force over time or in a short period of time (i.e., hitting your phone against a wall), cracks may appear in your product's body because its internal structure has been weakened due to excessive stress from impact contact with other objects (or simply through repeated impacts).
• Plastic Deformation: After being pressed on by outside forces such as an ax head striking wood logs during chopping wood--or in this case--a hammer striking metal nails into wood posts holding up our house structure during construction work activities such as framing walls inside houses/apartments where these types occur often enough without anyone noticing them until later when they become more noticeable due to wear & tear caused by use over time thus leading us back into topic about why this happens so let's continue...

If the grinding speed is too high, workpiece temperature rises quickly and causes cracks.

When the grinding speed is too fast, the workpiece temperature rises quickly and when it exceeds a certain value (about 400 degrees), it will be more prone to cause cracks. The workpiece temperature is closely related to the heat conductivity of a material, so when you are grinding in a wet or semi-wet state, the thermal conductivity of this material will be higher than that of dry grinding. Therefore, when grinding in a wet or semi-wet state, it should reduce its grinding speed by about 10%.

Grinding crack is a form of surface defect on the ceramic part's outer layer, which affects how well the product functions.

When grinding cracks occur, it is necessary to understand the cause of the cracks and take measures accordingly to prevent future occurrences.

Solidification segregation refers to the phenomenon that when a metal ingot solidifies, its composition changes greatly according to its position in the mold. The inner part of an ingot has higher concentration of some elements and lower concentration of others compared with those on its surface. Therefore, when you grind two different parts together in one grinding process, solidification segregation can lead to production defects such as cracks or distortion. In order for this type of defect not occur during grinding, it is necessary for adjacent parts with different compositions (higher/lower) or temperatures not be ground together at the same time.[1]

Micro-shrinkage cavity refers to a small cavity generated during metal machining due to thermal contraction during cooling down after being melted by heat treatment.[2][3] In other words: When heated above room temperature but below melting point under high pressure in certain conditions (such as intense wear), metals may experience micro-shrinkage due to internal chemical reactions between various elements within them (such as oxygen). If left untreated, these cavities will eventually grow until they reach critical levels and become visible on top surfaces where they form cracks.[4]

Grinding crack, also known as grinding crack.

Grinding cracks are usually caused by improper or sudden movements of the part. Other causes include rusting, excessive vibration, and stress from mechanical loads.

Grinding crack is a common problem with all types of equipment, but engine parts such as crankshafts and connecting rods are particularly vulnerable to this type of damage.

The main impact on your business is that grinding crack results in increased downtime for your equipment which can lower productivity and increase costs due to repairs or replacement parts being required sooner than expected.

Grinding cracks are surface defects on the ceramic part’s outer layer that can affect how well it works.

Grinding crack is a form of destructive surface defect on the surface of ceramic parts, which seriously affects its service performance and life. Surface defects are the result of grinding process; they occur due to human errors during grinding, or otherwise caused by environmental factors that affect the temperature and pressure during the production process.

Grinding crack may also appear in ceramics due to improper handling or rough handling during transportation after being produced. Another reason for this type of defect is that particles in orbit often become stuck on the surface due to poor cleaning measures before assembly, so as not only does it affect aesthetics but also significantly reduces product quality.

Grinding cracks usually occur in conjunction with other problems, such as chips caused by the manufacturing process or residual stresses.

Grinding cracks are usually combined with particles in orbit or residual stresses caused by the manufacturing process, so they cannot be prevented by some strengthening measures alone. Grinding crack is a form of destructive surface defect on the surface of ceramic parts, which seriously affects its service performance and life.

The main reason is that when grinding ceramic materials, they cannot stand high temperature and high pressure as well as other metal materials can withstand. In addition to cracking, you may also have stress due to welding or assembly issues that cause cracks inside your product after it leaves our factory.

A complete countermeasure system must be established to thoroughly deal with grinding cracks.

Grinding crack is a form of destructive surface defect on the surface of ceramic parts, which seriously affects its service performance and life. The most common cause of grinding crack is due to improper grinding or improper handling during processing. Grinding crack usually combines with particles in orbit or residual stresses caused by the manufacturing process, so they cannot be prevented by some strengthening measures alone. A complete countermeasure system must be established to thoroughly deal with grinding cracks.

Conclusion

After reading this article, you should be able to understand how the grinding crack is generated and how to solve it.