tooling and fi xturing to hold a part in a precise location; if the part moves slightly, the robot can still locate the joint and weld accurately, as long as the joint has well-defi ned edges. Using a wire cutter can ensure the wire is cut to a consistent length; the wire brake holds the wire in a set position as the robot articulates and searches for the weld joint, ensuring more accurate touch-sensing readings for more consistent weld quality.
Staying on Target by Maintaining TCP For a robot to be repeatable and provide consistent welds, it is important for the system to maintain its tool center point or TCP, which is the focal point of the robotic MIG gun and its relationship with the position of the welding wire in the joint (gun-to-work distance). Typically, but not always, TCP issues occur after a collision, during which the neck of the robotic MIG gun becomes bent. To rectify the issue, welding opera- tors can employ a peripheral called a neck inspection tool (or neck-checking tool) to bend the neck back to the proper angle. Most neck inspection tools are designed to accommodate standard necks for a particular brand of robotic gun. To use this peripheral, the welding operator or maintenance personnel needs to determine the toler- ances for the robotic welding program and adjust the bent neck to meet the correct specifi cations. To maintain TCP, it is also important to install the robotic MIG gun neck properly, making sure it is fully seated. If not properly seated, it will extend too far and can cause TCP to be compromised. Programming the robot for a TCP check to verify proper position can also help prevent against quality issues and po- tential downtime.
Another best practice to help ensure on-location welds is to check
that fi xturing is in the correct place, that it doesn’t allow the parts to move and that the base of the robot is securely in place. Periodically check that part variation hasn’t changed, as well.
Cylindrical Drive Technology Revolutionary non-contact design
Auto-Threader
Allows up to 20.1 inches of through-part wire threading for tall parts
THE BEST JUST GOT
When we introduced our MV Series wire EDM machines, we had a feeling they’d make waves. A year later, the never-before-seen design improvements have reinforced our leadership in the market—and sparked our customers’ success. No other machine on the market has our non-contact cylindrical drive technology, improved power supply and deeper submerged cutting capabilities—all backed by the reliable, expert support our customers expect.
See what all the buzz is about at
www.mcmachinery.com or call 866-994-7856.
ONE SOURCE. ENDLESS EXPERTISE.
For current open positions, please visit our website:
www.mcmachinery.com or email:
jobs@mcmachinery.com
EOE M/F/D/V See us at FABTECH Booth #B-1925 October 2014 |
ManufacturingEngineeringMedia.com 83
BIGGER INTRODUCING THE NEW MV4800
Compact Head Design Easy indexing during operation
Visit Our New www WEB SITE
.mcmachinery.com
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