SSMD replaceable drill bits include SMDT-NAL drill bits with a proprietary diamond-like carbon (DLC) Aurora coating. High-efficiency replaceable drill bits are suitable for processing aluminum alloy and non-ferrous metal materials. SMD tool holders include standard deep hole drilling up to 12 times the diameter, while the SMDT drill point product line offers 15/32" to 1-1/4" diameters to suit various applications.
Replaceable tip drilling (SMDT-NAL), DLC-coated solid carbide drilling (MDW-NHGS) and DLC-coated indexable inserts (WDX) complete the lineup of aluminum hole processing.
The main advantages are smooth coating surface, stable chip evacuation, aluminum weldability that supports high-quality surface finish, and 60 GPa hardness for wear resistance. Another advantage includes increased permeability due to the low coefficient of friction. Users can use feed rates that are 2 to 3 times higher than that of uncoated drills for machining, thereby reducing cycle time and unit cost.
Sumitomo Electric Carbide Corporation https://sumicarbide.com
Aurora coating is an amorphous film, mainly made of carbon, with lubricity and chemical stability. The film has hardness, excellent tribological properties and excellent anti-adhesion properties. DLC film has been used to reduce the fuel consumption of automobiles by reducing friction loss, and is also used as a cutting tool coating for aluminum alloys that have been widely used to reduce weight.
Norton | Saint-Gobain Abrasives experts discuss how to maximize productivity, tool life and quality.
Cylindrical grinding is one of the most common grinding applications for round or near-round workpieces, and the process can maintain very tight tolerances. Following some basic practices below will help ensure that your cylindrical grinder consistently produces high-quality parts.
The work center and the center hole of the workpiece (part or assembly to be ground) in the two spindles. Dirt in the work center or the work center hole will prevent the center from being fully seated, resulting in non-concentric rotation, resulting in out-of-round grinding of the workpiece.
The taper of the work center should be close to the workpiece. They should tighten the headstock and tripod. If they do not fit and do not fully contact the mating surface, they may move during the grinding process, which may result in out-of-round parts with chatter marks.
The angle between the center of the work and the center of the machine. If the center hole does not match the work center hole, the part may be ground out of round. In the worst case, the wheels may kick the workpiece out of the machine. Important point-Use the correct center drill, a center drill that complements the center installed on the grinder.
It is full and consistent in part. If you do not do this, the accuracy of the parts may be affected.
Apply high-quality center lubricant.
Failure to perform this operation on the dead center may result in damage or damage to the center. A damaged center may cause parts to be kicked out of the machine.
Place the dial indicator holder in the center of the bracket. Run the indicator back and forth along the part to check center alignment.
If wear occurs, please re-grind.
Watch out for the dog.
Work drive dogs and drive dogs make it a reality. They are essential for controlled part movement. Make sure they are in good condition and fastened tightly to the largest diameter of the part. Failure to do so will cause serious quality problems and may result in parts being kicked out of the machine. If parts start to be driven by wheels (rotators), strange part quality problems may occur. To make matters worse, rotation will cause the center to fail and parts fly out of the machine.
Between the drive dog and the drive pin. If this match is too tight, it may cause the part to be ground out of round due to binding.
After grinding a certain amount, the grinding wheel needs to be trimmed to rebuild the shape of the grinding wheel and expose new sharp particles. A fixed dressing tool or a rotating dresser can be used to dress the grinding wheel. If using a stationary dressing tool, make sure that its design and size are suitable for the grinding wheel being used. The size of the wheel and wheel specifications will determine which tool to use. A rotary dressing system equipped with diamond rollers should also be designed to match the size of the grinding wheel, the surface of the grinding wheel and the specifications of the grinding wheel. The traverse rate of the grinding wheel surface and the dressing depth (pickup amount) help the grinding wheel adapt to the rough and fine grinding of the workpiece. Faster wheel movement speed will increase the material removal rate (MRR), but will have a negative impact on the surface finish. Conversely, a slower movement speed will improve the surface finish, but will inhibit MRR.
Cylindrical grinding coolant systems are essential because they:
There are two methods for coolant application; one is suitable for old open machines, where the grinding wheel speed is usually = 6,500 surface feet per minute (sfpm). They usually run the overflow system with a lower coolant pressure and speed, and rely on gallons per minute (gpm) to clean the wear debris and keep the parts cool. These older machines use basic shovel-type coolant nozzles with scraper blades.
The new high-speed grinder (>8,500sfpm) with a completely enclosed grinding zone can utilize the high-speed and high-pressure coolant delivery system. According to experience, a pump that can provide 1.5gpm to 2.0gpm per horsepower is required. When the coolant speed matches the wheel speed in sfpm, the high-speed grinder has the best effect. Determining the proper time for the coolant to circulate is crucial, but it is often overlooked. Plan 5 minutes to 10 minutes; water-soluble low-viscosity oil needs 5 minutes, and high-viscosity oil needs 10 minutes. This will help determine the size of the coolant tank. Coolant tanks filled with grinding sludge can damage the coolant system.
In most operations, oil is the benchmark for slurry performance. This is good for both the machine and the parts. It is not suitable for all applications and manufacturing environments, so options include grinding with water-soluble oils or semi-synthetic grinding fluids.
Maintenance is very important. The system (water tank and machine) needs to be cleaned, and the coolant should be filtered and maintained within the manufacturer's concentration specifications.
When was the last time you cleaned and inspected the grinder? Preventive maintenance is a key part of producing consistent, high-quality parts. There is nothing worse than having to run a dirty and poorly performing machine due to insufficient maintenance. Take time to keep the machine clean. Commit to the recommended service and maintenance in accordance with the machine manufacturer’s recommendations.
Is the reservoir full? Has the filter been changed recently?
Is the lubrication system operating normally?
Is the main bearing operating at the proper temperature? Too hot means that the oil level is too tight or too low, and too cold means that the gap is too large. Excessive vibration means that the bearing may fail.
If they wiggle around and show a lot of wear or screaming when starting up, replace them. When replacing the V-belt, check the pulley. If they are worn and the position of the new belt in the groove is too low, replace them. Make sure that the new pulley is properly aligned before installing the new belt.
Following these practices will help optimize the performance of cylindrical grinding operations. The experts at Norton | Saint-Gobain Abrasives can help with these and other applications, allowing you to increase the productivity and performance of your grinding operations.
Norton | Saint-Gobain Abrasives https://www.nortonabrasives.com
About the author: Phil Plaine is an application engineer in Norton | Saint-Gobain Abrasives.
The Columbia University research project uses artificial intelligence (AI) to identify driving behaviors that indicate early cognitive impairment.
A study by Columbia University’s Mailman School of Public Health and Columbia University’s Fu Foundation School of Engineering has shown that driving closer to home, stopping less each time you travel, and braking more aggressively when driving may indicate that elderly drivers are light-hearted. Degree of cognitive impairment or dementia and applied science have been discovered.
Researchers at New York University have developed highly accurate algorithms to detect mild cognitive impairment and dementia in elderly drivers using natural driving data, information captured in real-world environments through on-board recording devices or other technologies. This data can be processed to measure driving exposure, space, and performance in great detail. The results of the study were published in the journal "Geriatrics".
Researchers developed the Random Forest Model, a statistical technique widely used in artificial intelligence (AI) disease state classification.
“Based on variables derived from natural driving data and basic demographic characteristics (such as age, gender, race/ethnicity, and education level), we can predict mild cognitive impairment and dementia with 88% accuracy,” Associate Professor Sharon Di said. Civil Engineering and Engineering Mechanics at Columbia Engineering College and the lead author of the study.
Researchers used in-vehicle recording equipment to construct 29 variables from natural driving data of 2,977 participants in the LongROAD project, a multi-site cohort study sponsored by the AAA Traffic Safety Foundation. Participants were active drivers between 65 and 79 years old and had no obvious cognitive impairments or degenerative diseases. The data in this study was collected from August 2015 to March 2019.
As of April 2019, of the 2,977 participants, 33 were newly diagnosed with mild cognitive impairment and 31 had dementia. Researchers trained a machine learning model to detect mild cognitive impairment/dementia, and found that the accuracy of the model based on driving variables and demographic characteristics was 88%, which is better than that based on only demographic characteristics (29%) and only based on driving variables (66%). ) Model is much better.
Further analysis showed that age is the most predictive predictor of mild cognitive impairment and dementia, followed by the percentage of travel within 15 miles of home, race/ethnicity, and the number of minutes per travel chain (i.e. travel that starts and ends at home). Duration), strokes per minute, and the number of hard braking events with a deceleration rate = 0.35g.
"Driving is a complex task that involves dynamic cognitive processes and requires basic cognitive functions and perceptual motor skills. Our research shows that natural driving behavior can be used as a comprehensive and reliable marker for mild cognitive impairment and dementia. "Said Guohua Li, MD, professor of epidemiology and anesthesiology at Columbia Mailman School of Public Health and Vagelos School of Medicine and Surgery, senior author. "If validated, the algorithm developed in this study can provide a novel, unobtrusive screening tool for early detection and management of mild cognitive impairment and dementia in elderly drivers."
Although LongROAD participants use cars equipped with specialized recording equipment, many modern cars have advanced driver assistance systems (ADAS) that can provide similar data to the monitoring system, thereby increasing the possibility of the tracking system being implemented in the mass market .
AAA Traffic Safety Foundation https://aaafoundation.org/?the-longroad-study-longitudinal-?research-on-aging-drivers
Columbia University Mailman School of Public Health http://www.mailman.columbia.edu
Recycled materials are used to make injection-molded fuel pipe clamps on F-250 trucks.
Ford is working with HP to reuse used 3D printing powder and parts, shut down the cycle and turn them into injection-molded car parts. Sustainability is the top priority of the two companies. Through joint exploration, they found this unlikely and earth-friendly solution. The resulting injection molded parts are better for the environment and will not affect durability or quality.
Recycled materials are used to make injection-molded fuel pipe clamps on F-250 trucks. These parts have better chemical resistance and moisture resistance than traditional versions, with a weight reduction of 7% and a cost reduction of 10%. The Ford research team has identified 10 other fuel pipe clamps on existing vehicles that can benefit from powder recovery.
"Finding new ways to use sustainable materials, reducing waste and leading the development of a circular economy is Ford's passion," said Debbie Mielewski, a researcher of Ford's sustainable development technology. "Many companies are looking for great uses for 3D printing technology, but together with HP, we are the first to discover high-value applications of waste powder that may be landfilled and turn it into functional and durable auto parts."
The HP 3D printer is designed to be highly efficient, and its system can minimize excess material and reuse more powder. The team worked with Ford, which uses HP 3D printing technology at the company's advanced manufacturing center, to create a zero-waste solution.
In addition to HP, Ford has also developed a toner recycling system in cooperation with three other partners.
"You can get a more sustainable manufacturing process through 3D, but we have been working hard to do more to push our industry forward and find new ways to reduce, reuse, and recycle powder and parts," Chief Sustainability Talk to the social influence officer Ellen Jackowski, the value of life. "Our cooperation with Ford has further expanded the environmental benefits of 3D printing, showing how we can combine completely different industries, make better use of discarded manufacturing materials, and achieve a new circular economy."
Ford is developing new applications and 3D printing using a variety of processes and materials, including filament, sand, powder, and liquid barrel polymerization. The company has used 3D printing for various small-volume commercial vehicle parts and fixtures used by assembly line workers.
"The key to achieving our sustainable development goals and solving wider social problems is to work with other like-minded companies-we can't do it alone," Mielewski added. "Working with HP, we defined the waste problem, solved the technical challenge, and found a solution in less than a year. This is something we are all proud of."
Ford and BMW will acquire Solid Power solid-state batteries sometime in 2022, thanks to a supply agreement between the two companies for a $130 million investment in the battery company.
Eliminating the liquid electrolyte in lithium-ion batteries can significantly reduce weight and increase the energy density and available power of future electric vehicles (EVs). In addition, solid-state batteries eliminate the biggest risk of lithium-a short circuit caused by crystal growth, which can pierce the battery wall and cause fires and explosions. Automakers and technology companies are investing millions of dollars in the development of automotive-grade solid-state systems. Some recent developments include: Ford, BMW and other investors injecting $130 million into Solid Power. The Colorado-based battery developer plans to build a production The battery test factory will be in early 2022. The US$130 million Series B investment led by BMW Group, Ford Motor Company and Volta Energy Technologies includes the expansion of joint development agreements with Ford and BMW to ensure all solid-state batteries for future electric vehicles.
Doug Campbell, CEO and co-founder of Solid Power, said: "BMW and Ford are now leading the competition in all solid-state battery-powered electric vehicles." Solid Power now plans to start producing cars on the company's pilot production line in early 2022. Grade battery. "
Ford Electrification Subsystem and Power Research Manager Ted Miller said that reducing the space for large-capacity batteries will allow automakers to "increase vehicle mileage, improve internal space and cargo volume, and provide customers with lower costs and higher value." , And more effectively integrate these solid-state battery technologies into the existing lithium-ion battery production process."
https://www.bmwgroup.com; https://www.ford.com; https://solidpowerbattery.com
QuantumScape clears technical barriers for Volkswagen's investment of US$100 million QuantumScape Corp. has reached the technical milestone set by Volkswagen (VW), which is a condition for the planned investment of US$100 million. Volkswagen's investment depends on the automaker's successful testing of QuantumScape's latest solid-state lithium metal batteries in its German laboratory. With the achievement of the milestone, Volkswagen's investment in QuantumScape will double to 200 million US dollars.
Frank Blome, head of the Volkswagen Battery Center of Excellence, said: "We look forward to receiving and testing subsequent generations of batteries, and the goal is to put solid-state technology into mass production."
https://www.quantumscape.com; https://www.volkswagenag.com