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1. Science: Polarity compensation mechanisms on the perovskite surface KTaO3(001)The use of scanning probe microscopy and density functional theory by Martin Setvin (Corresponding author) of the Vienna University of Technology, et al. studied the compensation mechanism of the perovskite potassium niobate (KTaO3) (001) surface with increasing degrees of freedom. The surface that is cut in vacuum is fixed in place, but it can respond immediately to insulator-to-metal transitions and possible ferroelectric lattice distortions. Annealing in vacuum forms separate oxygen vacancies, then the top layer is completely rearranged into ordered KO and TaO2 stripe patterns. The best solution was ultimately found by forming a hydroxylated cover layer with the desired geometry and charge and then placed in water vapor.Polarity compensation mechanisms on the perovskite surface KTaO3(001) (Science, 2018, DOI:10.1126/science.aar2287)2. Science: Atomic-resolution transmission electron microscopy of electron beam-sensitive crystalline materialsDaliang Zhang, Kun Li, and Professor Han Yu (co-corresponding correspondents) of King Abdullah University of Science and Technology have developed a series of strategies to solve the current challenges of high-resolution imaging of electron beam sensitive materials. The group’s design method uses a direct observation electronic computation (DDEC) camera to analyze a series of electron beam sensitive materials including a variety of metal-organic framework materials on the premise of limiting the overall electron dose. Using this strategy, the researchers observed the coexistence of benzene rings in UiO-66 and surface ligand-free and surface ligand capping. Thus, the results demonstrate that transmission electron microscopy imaging of atomic resolution for electron beam sensitive materials can be achieved using the above strategy.Atomic-resolution transmission electron microscopy of electron beam-sensitive crystalline materials (Science, 2018, DOI: 10.1126/science.aao0865)3, Science: Infrared hyperbolic metasurface based on nanostructured van der Waals materialsRainer Hillenbrand (Corresponding author) et al. of the University of Basque, Spain developed a mid-infrared hyperbolic facet by nanostructured thin layers of hexahedral boron nitride that support deep subwavelength-scale phonon polaritons. In-plane hyperbolic dispersion spreads together. By applying infrared nano-imaging technology, the concave (irregular) wavefront of the divergent polarized beamlets can be seen, which represents the hallmark signature of the hyperbolic polaron. These results illustrate how near-field microscopy can be used to reveal the external wavefronts of polaritons in anisotropic materials and demonstrate that nanostructured van der Waals materials can form highly variable and compact platforms for hyperbolic infrared conversion devices and circuits.Infrared hyperbolic metasurface based on nanostructured van der Waals materials (Science, 2018, DOI:10.1126/science.aaq1704)4, Science: Wrapping with a splash: High-speed encapsulation with ultrathin sheetsThe elastic film can rely on the hair suction to create an independent package on the droplets, and the intuitive observation of the process is very important. Narayanan Menon (Corresponding author) of the University of Massachusetts, USA, studied the inclusion of oil droplets in ultra-thin polymer films in the aqueous phase. The researchers obtained the 3D shape of the coating layer by polymerizing the 2D cutting edge of the film, and demonstrated the universality of the technology through both water-in-oil and oil-in-water films.Wrapping with a splash: High-speed encapsulation with ultrathin sheets (Science, 2018, DOI: 10.1126/science.aao1290)5. Nature: Catalytic assembly-point functionalization of carbyne equivalents with substitute chemicalsMarcos G. Suero (Corresponding author) and others of the Barcelona Institute of Science and Technology have realized that the intrinsic feature of carbyne is the continuous formation of three new covalent bonds. It is speculated that catalytic methods that produce carbon alkyne or other carbon forms that are relatively stable can This is achieved by constructing an assembly point separation method for a chiral center. The research group designed a new catalytic method that utilizes a visible light photo-oxidation-reduction catalyst to generate diazomethyl free radicals as analogs for carbyne. These carbyne analogs can induce site selection for carbon-hydrogen bond cleavage on the aromatic ring, resulting in an effective diazomethane methylation reaction, which can stabilize the sequencing control of the functionalization of late-stage assembly of pharmaceutical chemicals. This method provides an effective path for bioactive molecules to adjust the site of the chiral center, and can also perform an effective post-functionalization process.Catalytic assembly-point functionalization of carbyne equivalents with substitute chemicals (Nature, 2018, doi:10.1038/nature25185)6. Nature: Processing bulk natural wood into a high-performance structural materialThe University of Maryland Hu Liangbing and Teng Li (Common Communications) and others have developed a simple and effective strategy to directly convert blocky natural wood into high-performance structural materials with a tenfold increase in strength, toughness and ballistic resistance. Greater dimensional stability. Partial removal of lignin and hemicellulose from natural wood by boiling in an aqueous mixture of NaOH and Na2SO3, followed by hot pressing, results in the complete collapse of cell walls and complete densification of natural wood and highly consistent cellulose nanofibers. . This strategy has proven to be universally valid for all types of wood, which has a higher specific strength than most structural metals and alloys, making it a low-cost, high-performance, lightweight alternative.Processing bulk natural wood into a high-performance structural material (Nature, 2018, DOI:10.1038/nature25476)7. Nature: A new discovery of crystal disordered transformation to eliminate defectsThe article entitled “Freezing on a sphere” by the team of Paul M. Chaikin (Corresponding author) of New York University shows that the freezing of the sphere surface is formed by forming a single, “continent” containing crystals, which forcefully divides the defects into parts. 12 isolated “oceans.” Using this broken symmetry – align the vertices of the icosahedron with the defect “sea” and unfold these faces onto a plane and construct a new ordered parameter to reveal the potential long-range orientation order of the lattice. The effect of geometry on crystallization can be taken into account in the design of nanoscale and microscale structures in which movable defects are segregated into self-aligned arrays. In addition, the separation of defects at symmetrical locations and the concomitant mobility near these locations have been shown to be useful when designing specific regions for structures that require rigidity and flowability.References: Freezing on a sphere (Nature, 2018, DOI: 10.1038/nature25468)8, Nature: Multi-terminal memtransistors from polycrystalline monolayer molybdenum disulfideNorthwestern University Mark C. Hersam (Corresponding author) and others used polycrystalline single-layer molybdenum disulfide (MoS2) to experimentally implement multi-terminal hybrid memory resistors and transistors. Two-dimensional MoS2 memristors exhibit gated adjustability in a single resistive state. In addition, the six-terminal MoS2 memristor transistor also has a gated heterogeneity synapse function. The device helps to study complex neuromorphological learning and defect dynamics Carbide Drilling Inserts in two-dimensional materials.Multi-terminal memtransistors from polycrystalline monolayer molybdenum disulfide (Nature, 2018, DOI:10.1038/nature25747)9, Nature: Skin electronics from scalable fabrication of an intrinsically stretchable transistor arrayProf. Bao Zhennan (Corresponding author) of Stanford University designed a method for mass production and uniform preparation of various intrinsic extensible electronic polymers. The prepared electronic equipment can realize intrinsic elastic polymer transistor arrays. Density up to 347 transistors per square centimeter. At the same time, the conductivity and sensitivity of the transistor, which stretches the strain 1000 times, have not decreased significantly. It is possible to construct elastic stretchable electronic skin with sensor arrays and digital circuits. The reported slot milling cutters preparation method can also be applied to the application of other intrinsic elastic polymer materials to prepare a new generation of elastic stretchable electronic skin devices.Skin electronics from scalable fabrication of an intrinsically stretchable transistor array (Nature, 2018, DOI: 10.1038/nature25494)
Source: Meeyou Carbide

The Cemented Carbide Blog: https://rockdrillbits.hatenablog.com/

Walter USA has expanded its solid-carbide micro drill line with the addition of the DB131 Supreme micro pilot drill sizes and extended the DB133 Supreme micro drill offering to deep drills up to 30 × DC. According to Walter, these new drills are designed to help achieve maximum process Carbide Milling Inserts reliability with minimal dimensional variations and extended tool life in steel, cast iron, nonferrous, super alloys, hard materials and other materials (ISO P, K, N, S, H and O). Stainless steel (ISO M) is added to the list with internal coolant capability.

The use of Walter grades WJ30EL and WJ30ER is said to ensure that the drills provide superior wear resistance. In addition, the optimal cutting-edge preparation on the drill provide excellent surface finishes.

A new type of flute design reliably evacuates chips, even with the tinniest drills. This capability ensures that hole depths up to 30 × DC can be easily achieved with the DB133 Supreme micro drill with its 140° point angle. The DB131 Supreme micro pilot drill features a 150° point angle. Emulsion, oil or minimum-quantity lubrication (MQL) can all be used as a coolant with these drills.

The new DB133 drills Carbide Drilling Inserts without internal coolant are available in a diameter range from 0.020-0.116". (0.5-2.95 mm). The diameter range for the micro drills with internal coolant is 0.028-0.116". (0.7-2.95 mm). Length to diameter ratios (L/D) of 5, 8, 12, 16, 20, 25 and 30 × Dc are standard for micro drills with internal coolant and 5 and 8 × DC without internal coolant. This new drill design is effective for applications in the medical, watchmaking, general mechanical engineering, mold and die making, energy and automotive industries.

The Cemented Carbide Blog: turning Insert

Although Horn initially built its reputation on grooving and part-off technology, pigeonholing the tooling manufacturer as a specialist in those areas alone would be a huge disservice to the company and any potential customers. Moreover, a broader product line isn’t the only factor in Horn’s becoming a bigger contender during the past few decades. The company itself has grown steadily as well, a trend that management expects to continue throughout 2013 and beyond. 

These were two major takeaways from “Technology Days,” a biennial event at the company’s headquarters in picturesque Tubingen, Germany. Along with more than 2,000 customers and dealers from around the world—a reportedly CCMT Insert larger crowd than in previous years—press members including me and Chris Koepfer, editor-and-chief of MMS sister publication Production Machining, enjoyed a busy three days of demonstrations, tours and technical presentations.

Although Horn’s grooving expertise was evident from the get-go, demos and placards also showcased products that ran the gamut from milling and turning to broaching, reaming and thread-whirling. Notably, not all of these offerings were selections from the company’s 20,000-strong line of standard tools. Many were custom-designed models—which represent more than 50 percent of the company’s total annual turnover. The merits of custom tooling was also the topic of a particularly interesting technical presentation, while others focused on high-feed-rate machining, cutting with ultra-hard diamond and CBN materials, and performing broaching on CNC machines. (Watch for in-depth coverage of these topics in upcoming issues of both MMS and PM.)

In the United States, standard and custom tools alike are manufactured at Horn USA’s facility in Franklin, Tennessee. The U.S. market’s strength and growth potential has spurred plans to more than double the size of that facility beginning this year.  The overall company is growing, too. With annual turnover expected to rise by € 5 million this year over the € 220 million reported in 2012, the company is constructing a new building at the Tubingen campus for additional capacity. That project is slated for completion in 2015.

These expansions follow close on the heels of the 2012 completion of another new facility in Tubingen: a 16,000-square-meter factory for Horn Hartstoffe, the company’s carbide manufacturing operation. Here, powdered carbide mixes are shaped into “green” inserts via three different processes: axial pressing, and, perhaps more notably, extrusion and injection molding. This aspect of Horn’s manufacturing process, as well as the custom machines it uses to grind inserts after sintering, CNC Carbide Inserts were among the most fascinating aspects of my trip. Click here for a brief virtual tour.  

The Cemented Carbide Blog: CNC Carbide Inserts

Officially unveiled in Whitestown, Indiana, during a May 5th ribbon-cutting ceremony, Rego-Fix’s new U.S. headquarters facility includes all the usual—office space,  a storage area, space for training and machining demonstrations, and so forth. It also includes some of the not-so-usual, such as workout facilities for employees. There’s plenty of space left over, too, as the company continues efforts gun drilling inserts gun drilling inserts to expand sales, service and support on this side of the Atlantic. The Swiss company had certainly outgrown its previous location here in the states, but at 20,000 square feet, this one is more than twice the size. It can reportedly accommodate more than twice the inventory of the previous location, even prior to the potential addition of a mezzanine level later. The lot has space to expand the building by another third if needed as well. 

Rego-Fix is perhaps most renowned for its 1972 invention of the ER collet, which has since become a staple in shops around the world. Other notable tool clamping milestones include the development of the PowRgrip, a clamping system that works mechanically rather than hydraulically or via heat, as well as the reCool system, which is designed to add coolant-through capability to existing turning tool stations. However, talking to representatives also clarified the importance of continued innovation during the time between major releases—that is, improvements to or novel applications of already established products and technologies.

One of the most recent examples arose from the company’s partnership with Zoller, which offers tool presetting and measuring devices that are highly complementary to Rego-Fix’s own technology. After all, securing tools in their holders with a system like the PowRgrip goes only so far if those tools aren’t measured to ensure correct offsets. Thanks to recent work between the two companies, these machines can now be integrated into one unit to automate the process of presetting, clamping and measuring tools. Although neither are brand new systems, this capability can be significant for, say, a high-volume automotive manufacturer that desires an alternative to heat-shrink technology but doesn't want to give up automated presetting and clamping. 

The process is simple (here’s a video). The tool is installed in a PowRgrip toolholder mounted in the receiver of the Venturion and measured, just as it would be on a standalone system. During the measurement, the tool moves up and down within the holder slot milling cutters and collet on a set screw until mounted properly. The system offers length presetting repeatability of less than 10 microns. With the tool’s position established, the PowRgrip unit clamps it securely into place in less than 10 seconds. Runout is reportedly less than 3 microns. Another quick measurement on the Venturion verifies the tool assembly prior to its installation in the machine.

The Cemented Carbide Blog: CNC Carbide Inserts

Whether it’s for a toolroom, a job shop or a production house, there are a lot of factors to consider when it comes to acquiring a vertical machining center (VMC). Key preliminary considerations include the intended application and workpiece(s) and the needs of a shop’s various departments. And then there’s the research and data-gathering process.

In addition to characteristics like structure and stability and spindle details, potential VMC buyers should keep in mind how the toolchanger, coolant delivery and chip disposal systems contribute to overall machine efficacy.

Selecting the Toolchanger

The toolchanger specified for a new VMC must have an adequate number of tooling pockets and be able to accommodate the size and weight of the cutting tool assemblies. Every VMC has a maximum tool weight and diameter that its toolchanger can handle to prevent a tool from dropping out of the pocket.

In high-production environments, where many tools may be required to machine the parts, tool-change time can have a substantial influence on efficiency. For example, having a machine capable of a 1.4-second chip-to-chip tool-change time,CCMT Insert rather than 3.6 seconds, can quickly add up to more productivity and profit.

Coolant Concerns

For certain applications, optional provisions for delivering coolant at high pressure directly through the spindle are recommended. Coolant pressure as high as 1,000 psi is intended to promote chip evacuation from deep bores in which chip breaking is directed at the tool point. Unlike time-consuming peck-drilling cycles, through-the-tool, high-pressure coolant enables the material to be removed in one pass. This approach may reduce drilling time by as much as 30 percent. Additionally, the part remains cooler, surface finishes inside the bores are protected, accuracy of the parts is maintained and cutting tools last longer.

For high-pressure coolant, the capacity of the coolant tank may need to be tungsten carbide inserts enlarged. Likewise, an oil skimmer may be an option to consider for extracting waste oil from water-soluble coolant.

Chip Removal

Chip removal is an important consideration that is often overlooked in the evaluation of a new CNC machine. Whether chips are evacuated from the machining zone with water, oil or air jets, they will fall to the bottom of the machine. A smaller volume of chips can be removed by an auger, which is typically standard on most VMCs, but a large volume of chips may require a conveyor. Although it is possible to have the machine operator manually remove chips from the machine, this task is labor-intensive and messy. Using a chip auger or conveyor to remove chips automatically and deposit them in an external bin is recommended. Pay attention to whether the chip conveyor or auger evacuates the chips from the side or rear of the machine, however. The location of the chute determines how much space will be needed on the shop floor, how close the machine can be placed to other machines or walls, and how easily a fork truck can retrieve a loaded chip bin.

Do Your Research

Techspex.com, a free research center and analysis tool, can help a shop find the right VMC for the job. Simply enter the basic attributes and specifications that are required, and the system will provide a side-by-side comparison by machine type, model and builder. Users can register for free here.

This is part three of a three-part series about buying a VMC.

Find more insights about acquiring a new machining center by visiting the Techspex Knowledge Center, “Guide to Buying Machine Tools.”

This blog post was adapted from an article by Barry Rogers published in the Machine/Shop supplement to Modern Machine Shop magazine.

The Cemented Carbide Blog: tungsten carbide Inserts

Mack Tool and Engineering is a successful South Bend, Indiana, contract shop that primarily serves customers in the aerospace, defense and medical industries. It taps a wide range of advanced equipment to machine parts from materials such as aluminum, stainless steel and high-nickel-content alloys that often have a variety of application-critical features. Joel Christensen says micro grooves are features that fall into that category, and they require tight tolerances in terms of width, corner radii and surface finish.

Mr. Christensen is a setup machinist in the shop’s two-axis turning center area, which has a couple of Mazak Quickturn Nexus 200 machines and a Mori Seiki SL-203. He says that because micro-groove specifications have become increasingly stringent over the years, he has considered new, more effective ways to machine them. Mr. Christensen points to a part the shop produced a few years ago that required a 0.02-inch-wide, full-radius groove. At that time, the decision was made to modify an existing Swiss-type toolholder and inserts for use in one of the two-axis turning centers. This required in-house grinding operations to add the full radius to the end of the inserts as well as shimming of the toolholder. In the end, the modified tool would produce the groove, but insert life was limited and unpredictable. Mr. Christensen says he sometimes was able to complete only five parts before the tool would break.

When this job returned for the third time, Mr. Christensen was given the okay to try a different grooving solution. He was aware of the Thinbit brand of grooving tools from Kaiser Tool (Fort Wayne, Indiana) and ordered a toolholder and a pack of Groove ‘N Turn inserts that feature the Dura-Max 2000 sub-micron grain carbide substrate. The inserts were off-the-shelf models that had the proper 0.02-inch-wide, full-radius tip. After switching to this Thinbit tool, Mr. Christensen was able to complete an entire batch of 60 parts with a single insert while achieving a surface finish of 32 Ra. Not only did this enable him to complete the job much faster because no grooving tool inserts needed to be replaced during the run, but it also eliminated the need to modify inserts to match the grooving application.

The success with this part is spurring Mr. Christensen to consider Thinbit tools for other parts that require micro grooves, especially given that he is now programming and choosing tooling for an increasing number of jobs in his area. One example is the aluminum aerospace part shown in photo 1 that requires two sets of three grooves. Thinbit offered another off-the-shelf solution for this part with inserts that have the proper 0.03-inch width and 0.01-inch corner radii. Each plunge of this tool completed a groove with a 32-Ra finish.

Another example is the high-nickel-alloy part shown in photo 2. The challenge with this part is not so much the three full-radius grooves at the end of the cylindrical body. Rather, it is the facing operation required for the boss and the 0.051-inch full-radius groove where the boss meets the body. Although the facing operation presents a heavily interrupted cut, a single full-radius Thinbit insert was able to face the boss and machine the groove for an entire batch of 25 parts, showing just a limited amount of wear afterwards. This speaks to the durability of these inserts, Mr. Christensen says.

Similarly, Mr. Christensen recently ordered and received Thinbit inserts to replace another brand for a face-grooving job he is currently running. The tool has a 0.002-inch full radius with a chipbreaker geometry ground into it. He believes the insert will hold the necessary ±0.0002-inch tolerance that’s required while the chipbreaker will enable this tool to do a better job of preventing unacceptable burrs from forming because it causes the insert to be even sharper. He also sees value in Thinbit Form-A-Groove inserts, which have multiple groove profiles on a single insert. That way, a single tool can create a number of grooves in a single plunge, which would be ideal for the aluminum part mentioned above.

To date, Mr. Christensen has used Thinbit groove inserts in widths ranging from 0.0195 to 0.065 inch with sharp and full-radius tips. In fact, Thinbit tooling has since been used to perform grooving work on the shop’s Swiss-type lathes and turn-mill multitasking machines. Mr. Christensen continues to consider and suggest Thinbit for future grooving work in his area, too,especially as he is becoming more involved in programming and choosing tooling to be used on the two-axis turning centers. Plus, he has recently replaced another cutting tool brand with Thinbit triangular carbide inserts for an ID boring operation. These inserts hold up just as well as those they replaced and are less expensive, he notes.

Mr. Christensen says he’ll do this because there are three aspects of Kaiser Tool—which celebrated the 50Tungsten Carbide Inserts th anniversary of the Thinbit brand in June—that he particularly appreciates. First, the company keeps a wide range of grooving tools in stock, offering fast delivery of inserts having various widths and tip geometries. Second, it turns custom tooling requests quickly. Although only a small fraction of Mr. Christensen’s jobs require custom grooving tool profiles, he says Kaiser Tool has turned some of those requests around in a matter of days. Finally, the company provides quality customer service. Mr. Christensen says he receives an email reply or phone call within 15 minutes of contacting Kaiser Tool to ask a question or place an order. The company will even contact him right away even if it isn’t able to provide a quote at that time. Mr. Christensen says he doesn’t always get this type of immediate RCMX Insert response from other tooling companies. 

The Cemented Carbide Blog: carbide drilling Inserts

Original & New YP731 Introduction：ORIGINAL：Suitable forAustenitic stainless steel,304/316.etcEasy to collapse during intermittent machining,suggest to replace with FM chipbreakerSuitable for Medium speed machining,with high surface finishingNew: TCGT Insert Suitable forAustenitic stainless steel,304/316.etcEasy to collapse during intermittent machining,suggest to replace with FM chipbreaker.Suitable for Medium and high speed machining,Max ap 1.2 mm for end surface turningMax ap 1.5 mm for external turning,with good surface finishing Compare Conclusion :1. Machining versatility of upgraded YP731 has been fully enhanced2. The wear resistance is also greatly increased, especially in the case of high speed and large depth of cut.3. Upgraded on the substrate to improve the toughness and plastic deformation resistance of the inserts4. The coating process has also been optimized to improve the wear resistance of the inserts.Related search keywords:carbide inserts, carbide inserts for wood turning, carbide inserts apkt, carbide inserts for aluminium, tungsten carbide inserts, carbide inserts drilling, carbide Cemented Carbide Insert inserts for lathe tools, carbide inserts for cast iron, carbide inserts in machining, carbide inserts for lathe machine, negative carbide inserts, positive rake carbide inserts, vcmt carbide inserts, carbide parts, carbide insert
The Cemented Carbide Blog: carbide turning Inserts

The FNL-220LSY-series multi-axis lathe from Chevalier Machinery has the ability to mill as well as turn. Y-axis travel for off-center milling (±2.2" from the centerline) is said to provide the largest range in the machine’s? class. The lathe features high-torque live tooling and full C axes for the main and subspindles with minimum interpolation of 0.001 degrees. A hydraulic clamping cylinder with a disk break contributes to C-axis rigidity. These features facilitate throughput and reduce handling.

The lathe’s bar capacity is 2.0" for the main spindle. Its maximum cutting diameter is 12.6", with a turning length of 20.1". The swing over bed is 24.4". The chuck size is 8" for the main spindle and 6" for the subspindle. CNMG Insert The X-, Y-, Z- and C-axis travels measure 8.7" × 22.0" × 4.3" × 360 degrees, respectively, with a traverse rate of 1,181 ipm.

A 60-degree, compound Y-axis slant bed design with linear roller guideways contributes to accuracy during high-speed machining. These guideways provide 30-percent stronger rigidity than regular ball ways, according to the company.

The lathe’s Sauter 12-station BMT 45 live turret provides tool speeds ranging to 4,000 rpm. An oversized clamping curved coupling improves cutting tool rigidity and accuracy.

The FANUC 0i-TF control features FANUC drives and motors plus a 10.4" color LCD with a fully conversational Manual Guide i program and 3D simulation. The lathe’s accessories include a chip conveyor, parts catcher, oil skimmer, tool presetter, TCMT Insert turning holder package and rotary holders package.

The Cemented Carbide Blog: Turning Inserts