Author name: sunbin

IT grade(s) refer to an internationally accepted code system for tolerances on linear dimensions. Such code systems may be used to produce interchangeable parts. In engineering, the word tolerance refers to a range of allowable dimensions or values. Standard tolerance grades are a group of tolerances for linear sizes characterized by a common identifier. For […]

Climb Milling Climb milling refers to the cutting direction of the tool that aligns with the feed direction of the workpiece. Conventional Milling Conventional milling refers to the cutting direction of the tool that is opposite to the feed direction of the workpiece. In a conventional milling machine, there is a driving clearance in the

Accurately describing the failure modes of cutting tools is crucial for effective communication in the field of machining technology. The key aspect in determining the failure modes of cutting inserts is to identify their initial failure mode. In other words, it is necessary to make assessments when the cutting insert first exhibits signs of a

Notching, primarily occurring on the trailing face of the main cutting edge, typically appears at the edge of the contact area between the cutting edge and the chip. This is the part of the cutting edge that makes contact with the workpiece surface. In this region of the cutting edge under high-temperature conditions, it is

When cutting ductile materials within a certain cutting speed range, the workpiece material continuously accumulates and adheres near the cutting edge on the front face of the tool. In some cases, it may even weld onto the cutting edge of the tool, forming a built-up edge (BUE), commonly known as a “chip lump” or “tool

Combing thermal cracks are primarily caused by rapid fluctuations in cutting temperature.Combing thermal cracks are narrow cracks that are perpendicular to the main cutting edge and exhibit a comb-like parallel distribution. Under the combined effects of thermal shock and mechanical load impact, stress cracks perpendicular to the cutting edge are generated along the cutting edge.

Insert breakage, distinct from tip fracture, refers to a larger-scale fracture that does not occur at the rounded corner of the tool tip.The mechanism behind insert breakage is similar to tip fracture, as it is caused by excessive mechanical cutting loads. Note:In many cases, the gradual development of other types of wear can lead to

Tool tip fracture is mainly caused by excessive cutting loads. The strength of the tool tip is insufficient to withstand the high cutting loads.The cutting load includes not only the magnitude of the cutting force but also the degree of variation in the cutting force. Tool tip fractures caused by mechanical overload typically occur at

It refers to small fractures that occur on the primary cutting edge, including the cutting edge tip. In the initial stages, these fractures may not be visible to the naked eye and require magnification for observation. One can use a fingernail to lightly scrape the cutting edge and feel the distinct sensation of chipped edges.In

Plastic deformation mainly occurs due to excessive cutting heat. Thermal overloading. It is particularly prone to occur in cutting processes with high cutting parameters and poor thermal conductivity. High Cutting Parameters:High cutting speed, feed rate, and cutting depth, all of which are closely related to the cutting load. Poor Thermal Conductivity:Materials with low thermal conductivity,