Claire Keane
sheepfilms
almost home
Lint Roller? I Barely Know Her
d e v o n
No title available
🪼
Jules of Nature
Sade Olutola
@theartofmadeline
izzy's playlists!
Aqua Utopia｜海の底で記憶を紡ぐ
Stranger Things
Fai_Ryy
Sweet Seals For You, Always
Xuebing Du
EXPECTATIONS
Peter Solarz
Three Goblin Art
roma★
seen from Türkiye
seen from United States
seen from Ecuador
seen from France
seen from Türkiye
seen from Syria
seen from Malaysia
seen from Bangladesh
seen from United States
seen from United States
seen from United States
seen from United States
seen from United States
seen from United States
seen from United States
seen from United Kingdom
seen from United States
seen from United States
seen from United States
seen from Venezuela
@cademcnc-blog
CNC Morse taper - the inside story A taper is of course the best way of achieving concentricity between two components. Mating cylinders necessarily need to have a clearance, the male being of smaller diameter than the female. This clearance causes an axial shift between the parts. Mating tapers with the same angle, on…
CNC Work hardening, and how it affects machining Work hardening is the process of a metal becoming stronger and harder by plastic deformation, due to changes in the crystal structure of the material. When you bend a piece of wire back and forth a few times, it becomes harder to bend at the same…
CNC Increasing capacity - buy a machine or reduce downtime on existing machines ? Tough decision for a CEO ! Downtime on the shop floor can be up to 30 % because of poor work ethics and system problems (see this earlier post of mine). If I have 10 machines on my shop floor…
CNC How a bad machine increases the spindle load and your power bill Machines of two different makes may look the same, and we wonder why one costs so much less than the other. The reason may be that the cheaper machine is badly designed, made with cheaper components. The poor design and build…
CNC Grooving on CNC lathes - why you need a dwell at the bottom The grooving insert moving into the groove is actually moving along a spiral path. When it reaches the final destination diameter (the ID of the groove) it has cut the ID at only one point, not along the whole circumference.…
CNC Modifying cutting speed for required tool life Recommended cutting speeds in tool catalogs are for a tool life of 15 minutes. This means that with these parameters the insert edge will have to be changed after 15 minutes of contact with the workpiece. E.g., if the contact time is 3 minutes in rough…
CNC Do face mill angles matter - square shoulder, 45 degree, what's the big difference ? A face mill is subjected to two components of force - a radial force and an axial force. The radial force causes the arbor to bend sideways. It causes vibrations, poor surface finish, and reduces the life of…
CNC Heat shrink holder The heat shrink holder has a cylindrical bore which holds a tool with a cylindrical shank, like a side lock holder. The problem with a side lock holder is that it needs a clearance between the tool shank and the bore, typically 10 microns. When you clamp the tool with…
CNC Depth of cut in Threading - painful problem, with a simple solution Thread cutting often fails because of improper depths of cut. Too high depth of cut causes excessive load on the tool and part, high tool wear, and poor part quality. Too low depth of cut causes high cycle time and work…
CNC Insert coatings and your shoe's sole - what's the connection ? A shoe must be comfortable on the feet, made of material that is soft and that moulds itself to the shape of the foot. Leather has this quality, so we make shoes out of leather. But this same quality of softness causes…
CNC Is your machine sleeping a lot due to breakdowns ? Typically, when there is a machine breakdown on the shop floor, this is what happens: The operator goes searching all over the shop floor for the supervisor to report the problem, can't find him, and returns to his machine. The supervisor, who was…
CNC Anvils (alias shims) in threading tools - small things that make a big difference A thread is actually a groove cut at an angle, a helical groove. The angle of the threading tip must match the helix angle of the groove, so that the clearance on both sides of the insert is equal,…
CNC Eliminate trial part rejection and increase profits This is one of those "Oh, this is how we've always done things here" areas of a shop floor system. When we machine a batch of parts with a new CNC program, we always assume that a couple of parts are going to get rejected while trying…
CNC The right cutting parameters can reduce cycle time, drastically Even animals use tools properly, but humans on a typical CNC shop floor totally misuse cutting tools. Using the right cutting parameters can reduce cycle time and machining cost. For example, if you are using a cutting speed of 100 m/min when you should…
CNC BIG Machine downtime can result from SMALL reasons, and ruin your ROI This is a real story from a shop floor that uses our LEANworks machine monitoring software to track their machines, mostly VMCs and HMCs. Among other reports, LEANworks gives a report of downtimes and their reasons. The shop Manager kept noticing that every machine…
CNC Coolant - the inner gory details In a typical machining operation in CNC turning or CNC milling, two-thirds of the heat is generated as a by-product of shearing off the workpiece material. The other one-third is created by the friction of the chip sliding over the cutting tool. High temperature in the tool…
CNC Why you cannot cut steel with PCD tools PCD (Poly Crystalline Diamond) tools are made of diamond, and diamond is essentially pure carbon, with atoms arranged in a cubic crystal arrangement that makes it very strong. At higher temperatures (more than 700 deg. C), the Carbon atoms react with Iron to form Iron Carbide…