Modern Machine Shop

DEC 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.

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A shot of the 35-pound metal block cantilevered at 90 degrees and fixed at one end with just 3 mm of grip. This positioning allows roughing to take place on nearly 98 percent of the part, which distorts only microscopically during the process. After the roughing operation has ended, holes are drilled into the part that allow it to be held in place for finished machining on the five axis. Shopfloor Efficiency Modern Machine Shop 75 The same aluminum block after the roughing operation is complete. The weight of the aluminum block before roughing was 35 pounds. When roughing is finished, it weighs just 7 pounds. When the operation is complete, only the 3 mm serrated edge is sawed off the part. This 13-inch block of raw aluminum—destined to be an aerospace component for landing gear—is stamped with 0.1-mm-deep serrations just 3 mm off the edge of the block with a Lang Makro Grip Stamping Unit. By gripping these serrations, the Lang five-axis vice can hold the part within a five-axis machine in a way that allows roughing to take place on five sides of the part with no additional fixturing. microscopically during the process. After the roughing operation has ended, holes are drilled into the part that enable it to be held in place for finished machining on the five axis. While the weight of the aluminum block before roughing is 35 pounds, after roughing is finished, it weighs just 7 pounds. When the oper- ation is complete, only the 3 mm serrated edge is sawed off the part. In addition to workholding, Linda Tools' investment in the machining cycle also includes designing and machining its own custom fixtures for holding unusually shaped parts. As visible in the photos on page 76, the company mates its custom fixtures to a modular zero-point clamping system with receivers by Lang and Erowa, which enables the entire pallet and workpiece to be placed in and removed from the machine quickly. FIGURE 1 FIGURE 2 FIGURE 3

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