Modern Machine Shop

JUL 2018

Modern Machine Shop is focused on all aspects of metalworking technology - Providing the new product technologies; process solutions; supplier listings; business management; networking; and event information that companies need to be competitive.

Issue link: https://mms.epubxp.com/i/995618

Contents of this Issue

Navigation

Page 94 of 147

Machining's Role in Camera Production Modern Machine Shop 93 housing, we know what the aluminum wants to do," Mr. Martinez says. "We know that roundness is difficult to achieve with a welded construction like this," he explains, saying that the company would use a different weld preparation and different stress-relief conditions on any future parts resembling this housing. The work that Keller Technology and other contractors involved in this project have contrib- uted to the LSST components may very soon pay off. Back at the lab, "We're about two-thirds of the way through fabrication right now," Mr. Nordby says. Delivery of the camera to the summit in Chile is expected in May of 2020; once in place, it will allow scientists to study everything from near-earth asteroids to the very oldest parts of the universe. "We're expecting and hoping to make great discoveries." | CGTech | 949-753-1050 | cgtech.com | Keller Technology | 716-693-3840 kellertechnology.com | Mastercam - CNC Software, Inc. | 860-875-5006 mastercam.com | Parpas America Corp. | 248-253-6000 parpasamerica.com can work on the camera-housing part while other parts are running in the machining center. By the time the part came back from turning, a CAM program was ready and verified through the Vericut simulation software. "Finishing inside the part will be challenging," he says, because the housing requires surfacing to remove stock between 0.125 and 0.1875 of an inch throughout. Keller will again rely on the high- speed machining head, not just for its speed, but also its size: The gussets on the housing's inner diameter make it so that only about half the inte- rior can be turned by the subcontractor, so the rest will need to be milled on the Parpas with the head inside the part. The internal radius will be machined with a ball mill with stepovers of around 0.03 inch. Openings will also need to be cut and holes drilled before machining is complete. The housing will go through polishing and inspection before delivery to SLAC later this year. While the process for manufacturing these parts has not been easy, "I like to think one reason they [SLAC] came to us is that we have the ability to deal with complicated, challenging parts," Mr. Slack says. That means not just having the machining capacity to make parts like the camera housing and back f lange, but also the f lexibility and creativity to deal with problems as they arise. It also means learning from every part. "Now on something similar to the camera After the camera housing returned from stress relief the second time, Keller removed the spiders and set up the part to be machined on the Parpas XS 63. The housing will be finished and shipped to SLAC later this year. Photo: Keller Technology

Articles in this issue

Links on this page

Archives of this issue

view archives of Modern Machine Shop - JUL 2018