WORKHOLDING
is striving to do what they call single-pass threading. There’s not a lot of people that are doing it right now.” Single-pass threading is simply trying to thread the pipe in one pass in the cutting tool. “Generally now it’s just like any other kind of thread, where you do multiple passes to achieve the thread you want,” Robbins said. “Pipe is the same way. What everybody is trying to achieve with pipe is single- pass threading.” With this thread type, a lot of older products like manual chucks are being used only as rear chucks, but not as front chucks, he added. Newer chucks like SMW’s BB-FZA, which will be shown at the upcoming Houstex show in Houston Feb. 24–26, offer self-centering and compensating clamping, eliminating the need for shimming required on manual systems. “In the oil industry, threading of pipe is very common,” said Gerard Cochard, Röhm vice president, sales and
Quick changes at 5-micron repeatability take just minutes with the Schunk Vero-S quick-change pallet system shown on a horizontal mill.
HAIMER 3D-Sensor:
Positioning on the spot – Universally simple.
engineering, Röhm Products of America (Lawrenceville, GA). “For the most part, when the part comes through the machine and it gets clamped with a chuck, the area that gets threaded or machined, if you will, is a little bit out of concentricity in comparison to the area where we clamp it.” An opera- tor has to put some shims under the jaws, to put that area that’s going to be machined on center, he said, but in some cases the piece won’t be on center and clean up, resulting in what’s called black threads. “A black thread is a bad thread, so they throw out the part,” Cochard said. “The pipe can be many feet long—it’s expensive. They spend a lot of time in the setup to make sure the areas that are being machined are running concentric and they won’t have black threads.”
Measuring Instruments Tooling Technology Shrinking Technology Balancing Technology
Haimer USA, LLC | 134 E. Hill Street | Villa Park, IL 60181 | Phone: +1-630-833-1500 Email:
haimer@haimer-usa.com |
www.haimer-usa.com
See us at HOUSTEX Booth #209 72
AdvancedManufacturing.org | February 2015
At Houstex, Röhm will show a concept that allows the pipe to be centralized by a device that is part of the chuck and that removes the human intervention on the chuck. “It’s done automatically,” Cochard said. “The chuck is designed with six jaws, three jaws are responsible for central-
Photo courtesy Schunk Inc.
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136 |
Page 137 |
Page 138 |
Page 139 |
Page 140