Estefano Zselics (Zema Production Director), Rochus Mayer (CEO of the Junker Group) and Osnir Carlton (Zema Development Director) are pleased about their future cooperation.
The Junker Group is growing. From now on, the Brazilian grinding machine manufacturer Zema is part of the corporate group. Zema was founded in 1953, has more than 80 employees and manufactures CNC grinding machines with conventional grinding wheels – up until now mainly for the Brazilian market.
With the takeover, the Junker Group expands its expertise as a complete supplier in the grinding sector: The customer is now provided with CBN grinding machines, corundum grinding machines and air filters from a single supplier.
Junker machines are primarily designed for grinding with CBN. To add to its product portfolio, Junker Group has now secured a qualified majority share (more than 75 percent) in Zema. That's because the company has sophisticated solutions for grinding with corundum, for example, for machining the flange and journal on crankshafts or transmission, turbocharger and cardan shafts.
Junker CEO Rochus Mayer says this about acquiring the majority shareholding in the long-standing Brazilian company: "Now we can fulfill any customer needs, open up additional markets and supply combined production lines (CBN, corundum)."
Zema already supplies global players such as Bosch, ThyssenKrupp and Fiat in Brazil. The Brazilians now appear to have found the right partner to help them sell their grinding machine worldwide. After all, the Junker Group, with headquarters in Nordrach, Germany, does have a worldwide sales and service network that is continually growing. The Brazilians should fit right in.
Attendees of the Precision Machining Technology Show (PMTS) can see hands-on technology live on the show floor for no additional fee. Various machine tool builders have scheduled specific times to show the capabilities of the machines they have on display in their booths.
On Tuesday, April 21, at 2:30 p.m., in Booth 400, Index Corporation will showcase its C100 CNC lathe with the Fanuc 31iB control. It will be running an electrical connector. As part of the demo, the company will show the accuracy and repeatability of the Index toolholder with the patented “W” groove.
These showfloor demos are a good opportunity for attendees to set time aside for a first-hand look at the latest technology. Registration is now open for this 8th edition of PMTS, the biennial gathering of companies focused on the manufacture of precision machined parts.
The 0.15- 0.35 weight percent of lead contained in these bars helps them machine 25 percent faster with less power required.
Leaded steel bars historically have been a mainstay raw material in the screw machining industry. As more applications and newer technology move toward non-leaded steel applications, I thought that a brief refresher about lead and its role in shops might be timely.
Leaded steel bars are standard steels and widely available. In the U.S. 12L14 is the predominant grade. 11SMnPb30, 11SMnPb28, 9SMnpb28, and 9SMnPb36 are German designations nominally equivalent to 12L14. The Chinese version of 12L14 is Y15Pb; Japanese nominal equivalents include SUM22L, SUM23L and SUM24L.
Leaded steels are selected for use for the savings achieved in producing parts by machining.
Leaded steels are not appropriate for all parts, and parts with low amounts of stock removal may not create any noticeable savings.
Today’s leaded steels are more consistent, more uniform, than they were when produced by the ingot process.
The decision to use leaded steels for a specific part must be based on the economics for that part—volume, stock removal, part complexity, tolerances required, surface finish needed are all factors that contribute to that economic calculation.
There is no sacrifice in mechanical properties when adding lead to steel. Neither longitudinal nor transvers mechanical properties are affected by the addition of lead to steel.
Leaded steels are currently permitted under European Union regulations covering End of Life Vehicles, RoHS.
The reduction in energy required and time needed (about 25 percent!) to machine a part make leaded steels environmentally friendly by reducing carbon dioxide emissions to create parts compared with using unleaded materials.
In order to be dangerous to humans, lead must be in a soluble form. The lead in steel bars is a separate solid phase. IARC lists lead under its Group 2B category, “possibly carcinogenic to humans.”
Lead, as well as chromium, copper, manganese, nickel, and phosphorous is required to be reported under Sara 313 (40 CFR 372.65) when they are above established thresholds.
As an opportunity for students to see precision machining innovation and technology up close, PMTS 2015 and NIMS present Student Day at PMTS 2015 on Thursday, April 23, beginning at 9:30 a.m. at the Columbus Convention Center in Columbus, Ohio. On this day, registered educators and students of all ages will attend a short orientation and welcome session provided by Melanie Stover of NIMS. After the presentation, students will have the opportunity to explore the show floor to visit exhibitors and discover new technologies, lean about potential career paths and earnings and engage with employers.
Try to be at the Tsugami/REM Sales booth (101) at 1:30 p.m. on Tuesday during PMTS. The company is planning live demonstrations for attendees featuring its line of Swiss-type and multitasking machines.
Included is the SS327-5AX, a seven-axis, 32-mm Swiss with a programmable, servo-driven B axis for complete machining of complex parts. For contouring operations, the B axis and C axis can be e synchronized to cut precise angles and sculpted contours.
Demos will be held throughout PMTS, but by assigning a time to shopfloor demos at this year’s show, attendees can better use their time at the show by knowing when demonstrations are being held. Tsugami will demonstrate several other models as well. Click here for more information.