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Tham khảo tài liệu 'mcgraw-hill - the robot builder's bonanza episode 2 part 1', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 336 BUILD A HEAVY-DUTY SIX-LEGGED WALKING ROBOT Frame The completed Walkerbot frame measures 18 inches wide by 24 inches long by 12 inches deep. Construction is all aluminum using a combination of 41 64-inch-by-1 2-inch-by-1 16-inch channel stock and 1-inch-by-1-inch-by-1 16-inch angle stock. Build the bottom of the frame by cutting two 18-inch lengths of channel stock and two 24-inch lengths of channel stock as shown in Fig. 22.1 refer to the parts list in Table 22.1 . Miter the ends. Attach the four pieces using 1 1 2-inch-by-3 8-inch flat angle irons and secure them with 3-by-1 2-inch bolts and nuts. For added strength use four bolts on each corner. In the prototype Walkerbot I replaced many of the nuts and bolts with aluminum pop rivets in order to reduce the weight. Until the entire frame is assembled however use the bolts as temporary fasteners. Then when the frame is assembled square it up and replace the bolts and nuts with rivets one at a time. Construct the top of the frame in the same manner. FIGURE 22.1 Cutting diagram for the frame of the Walkerbot two sets . TABLE 22-1 PARTS LIST FOR WALKERBOT FRAME. 4 24-inch lengths 41 64-inch-by-1 2-inch-by-1 16-inch aluminum channel stock 4 18-inch lengths 41 64-inch-by-1 2-inch-by-1 16-inch aluminum channel stock 4 12-inch lengths 1-inch-by-1-inch-by-1 16-inch aluminum angle stock 8 1 1 2-inch-by-3 8-inch flat angle iron 4 24-inch lengths 1-inch-by-1-inch-by-1 16-inch aluminum angle stock 2 17 5 8-inch lengths 1-inch-by-1-inch-by-1 16-inch aluminum angle stock Misc 8 32 stove bolts nuts tooth lock washers as needed LEGS 337 FIGURE 22.2 Hardware detail for securing the angle stock to the top and bottom frame pieces. Connect the two halves with four 12-inch lengths of angle stock as shown in Fig. 22.2. Secure the angle stock to the frame pieces by drilling holes at the corners. Use 8 32 by 1 2-inch bolts and nuts initially exchange for pop rivets after the frame is complete. The finished frame should look like the
