I'm an ME, and one thing I'm curious about is how much you use tolerance stacks in your job? I work in high volume manufacturing products, and I have to make tolerance stacks for all of the gaps on the product I work on which takes super long. Is this something most mechanical engineers do / if so do you just get used to it and more efficient at staying organized/doing them quickly? How do you keep track of your stacks (excel, powerpoint)? Any tips for organization? How do you keep track of spec deviations/waivers, etc.? Thanks!

what causes built-upedge

When selecting cutting parameters and aiming for a better surface roughness, it is important to avoid cutting in the region where a built-up edge (BUE) is likely to form.

Increasing cutting speed and feed rate (resulting in thicker chips) can both raise the cutting temperature, thereby helping to avoid the formation of a built-up edge (BUE) in the cutting zone.

The material that forms the BUE is often much harder than the workpiece material itself. The BUE participates in the cutting process and provides a certain level of protection for the cutting edge.

Serrated chips

100 years of expertise in metalworking. All important information about our machines can be found in the new KNUTH catalog 2025. Find your next machine now!

The presence of a BUE causes actual changes in the radial and tangential positions of the cutting edge. It also alters the cutting angles. This, in turn, affects cutting forces, cutting heat, and chip formation. It can also impact the dimensional accuracy of the workpiece.

Mar 30, 2024 — In short, the Snapmaker 2.0 A350T is an all-rounder that should offer a comfortable experience in all of 3D printing, CNC, and laser engraving ...

Built up edgechips

Cobalt High Speed Drill Bits These Straight Shank Heavy Duty High and Reduced Shank Heavy Duty High Speed 135° Split Point Bits contain 8% Cobalt. The cobalt ...

Built-up chips

The detached BUE may also carry away some tool material, ultimately leading to tool edge failure. Alternatively, it may remain on the machined surface, affecting the surface quality of the workpiece.

Flank wear

As the cutting process progresses, the built-up edge (BUE) continues to grow. When the accumulated BUE exceeds a critical size, it can fracture and detach under the impact and vibration of cutting forces. The detached BUE is then carried away by the chip flow or embedded on the workpiece surface. This cycle of BUE formation, fracture, and removal repeats throughout the entire cutting process. The presence of intermittent and varying-sized BUEs can lead to cutting vibrations, which can adversely affect machining quality.

Cutting zone temperature:The temperature in the cutting zone is the most critical factor in the formation of a BUE.Cutting speed and chip thickness are key parameters that affect cutting temperature.

Grizzly bears /. Normal View MARC View ISBD View. by Poole, Hilary W.,. [ 01. English Non Fiction ] ...

Crater wear

The mechanism described above for the formation of a built-up edge is one of the explanations found in numerous related studies and provided for reference.

Order 26520-BRYANT. Fast shipping. Shop trusted brands & huge inventory of LED bulbs, fixtures, drivers, fans & electrical. Over 40 years in business.

Geometric parameters of the tool:For example, rake angle, relief angle, and cutting edge radius.Increasing the rake angle of the tool can improve the friction between the chip and the front face, thereby suppressing the formation of a BUE or reducing its height.

continuous chip with built-upedge

The formation of a built-up edge (BUE) can affect the relevant geometric parameters of cutting and alter cutting characteristics.

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 lump.”

Built up edgein metal cutting

We do not track live inventory on our website. If an item is available for purchase, it does not mean it is in stock. Most shipments ship within 1 business day.

Product Details. ER16 Collets (metric) – Shank Sizes: 4–5 Techniks Precision Collets have at most .0002" T.I.R. as a standard quality guarantee. Their clamping ...

During the cutting process, due to metal deformation and intense friction, there is significant pressure and high cutting temperatures between the chip and the front face of the tool. When the pressure and temperature conditions are suitable, the frictional resistance between the chip base and the front face increases, causing the flow rate of the chip base to slow down, resulting in the formation of a thin “stagnation layer.” When the frictional resistance between the “stagnation layer” and the front face exceeds the internal cohesion of the chip, the metal of the “stagnation layer” separates from the chip and adheres near the cutting edge, forming a built-up edge. The formation of a built-up edge is essentially the result of cold welding during the cutting process.

PRODUCT DESCRIPTION High-efficiency machining of stainless steel special inserts / wear-resistant and practical /

Choosing a tool material with poor adhesion to the workpiece material, particularly with the right coating, can be beneficial.

Because of their speed advantage over traditional carbide tools, ceramic milling tools have gained increasing popularity in recent years.

Adhesion characteristics between workpiece material and tool material:The formation of a BUE is more likely when machining ductile materials such as low carbon steel, stainless steel, nickel-based alloys, aluminum alloys, etc.The likelihood of BUE formation is lower when cutting brittle materials.

Mar 10, 2022 — Are there any brands of center drill bits I should look for or stay away from? I would like to find good ones on Amazon or at a local box store (Lowes/Menards/ ...

The gathering place for mechanical engineers to discuss current technology, methods, jobs, and anything else related to mechanical engineering.