Cleveland Hard Facing (CHF) Inc., a full-service hardfacing and machining shop, specializes in wear, corrosion and heat-resistant overlays, graphite oxidation prevention, refractory tubes and thermowells for molten metal use. Its welded overlays, which can be ceramic, nickel or cobalt superalloys, tungsten carbide and chrome carbide, fall into a hardness range of 35 to 65 Rc. To machine these tough overlays, the Cleveland-based shop relies on WG-300 cutter inserts from Greenleaf Corp. of Saegertown, Pa. The ceramic inserts not only increase machining speeds and feeds by five-fold over the shop's previously used carbide cutters, they are the reason CHF can keep its machining work in-house. "If we were still using carbide, we wouldn't be completing enough work per day to cover expenses," says Tom Mahusky, shop supervisor at CHF. "With the WG-300 cutters, we now machine parts in one day that used to take weeks."
JINHUA HARDFACING are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.
WG-300 inserts, made of whiskerreinforced ceramic materials, offer wear and thermal-shock resistance at high surface speeds. They are especially wellsuited for machining high-nickel and other heat-resistant alloys, hardened steels, hard irons and plasma spray and weld overlays at metal-removal rates reportedly up to 10 times greater than carbide. They are available with Greenleaf's special Rough Stuff surface treatment that improves insert gripping for accuracy and speed.
CHF President Randall Wischhusen credits the Greenleaf ceramic tooling for also paving the shop's way into CNC machining. Initially it used the Greenleaf inserts for manually turning large, round overlayed parts with plenty of interrupted cuts. The drawback, according to Wischhusen, was that the machines had no guarding and the ceramic cutters ran so fast they threw chips across the shop floor. To remedy the situation, the shop purchased enclosed CNC lathes.
Since the WG-300 inserts ran even better in the CNC lathes, CHF decided to expand their use to CNC milling nonround overlayed parts, so it purchased a Haas TM2 Tool Room mill. The shop's old manual milling machines lacked the spindle speeds necessary to take full advantage of the ceramic inserts.
For more CNC Hardfacing Machineinformation, please contact us. We will provide professional answers.
"We had to change our mindset with the Greenleaf ceramic inserts," explains Mahusky. "Instead of running fewer large depths-of-cut at slow speeds, as with carbide inserts, the ceramics make several shallow depths-of-cut but at faster speeds to shorten overall cycle times." These shallow cuts, typically 0.030 to 0.040-in. deep, also inflict less abuse on parts, tooling and machines. Mahusky runs spindle speeds up around 3,800 rpm, as opposed to 1,800 rpm used with carbide tooling. He initially sets feeds at 500 sfm and increases them from there &#; the shop's carbide tooling fed between 80 and 100 sfm.
However, CHF is not a highproduction shop cranking out large lot sizes, so a job could be finished by the time Mahusky determines optimum machining speeds and feeds. In this situation, he refers to suggested starting points that Greenleaf provides with its WG-300 inserts. www.greenleafcorporation.com
Description
Our hardfacing machine is our new generation automatic welding equipment with multi purposes and high performance. This hardfacing equipment has the advantages of stable overlaying function, easy to operate and convenient in installation. The hardfaced weld overlay can form a metallurgical bond with the substrate. This automatic welding equipment is also used to rebuild parts to OEM specification, or extend the service life of components through enhancing resistance to wear, abrasion, corrosion, heat and impact. Hardfacing machine may also be used selectively to critical wear areas on new parts, or as a means of restoring worn parts to original size.
Characteristics
1. Our automatic welding equipment can realize interactive operation through using TECO touch screen, human-machine interface and wireless remote control.
2. This hardfacing machine is highly-effective in real-time monitoring of operation process, production, welding time, and fault.
3. The aluminum alloy trolley and arm are designed by adopting a specially-designed turnover mechanism, and the welding head adopts universal adjusting lever. When the angle and height position is adjusted, this hardfacing equipment can be quickly debugged and installed.
4. This automatic welding equipment uses MITSUBISHI TECOPLC system to control welding parameters, touch screen manipulation settings, surfacing time, etc.
5. Special power supply for hardfacing to ensure stable output characteristics.
6. The operational control system of our hardfacing machine consists of touch screen, control box, and wireless remote operation handle. This handle helps obtain high working efficiency in hardfacing practices.
7. The X- and Y-axis walking mechanisms have the advantages of accurate positioning, fast response, and few errors under continuous running conditions.
8. Each unit of this hardfacing equipment is connected with imported aviation plug, durable, convenient and attractive in appearance.
9. This automatic welding equipment can be applied to arc welding, submerged arc welding, gas shielded-arc welding, swing arc welding, etc.
For more information, please visit Portable Hardfacing Machine.