我厂生产的产品上有一根长丝杆,直径Ф65公厘,长4930公厘,螺距12.7公厘。按理,这种长丝杆应当在大型车床上加工,但我厂设备较差,没有大车床,因此丝杆的加工就成为关键。在技术革命高潮中,工人们积极动脑筋,想办法,终于创造了车削长丝杆用的专用工具。工具的构造:12是轴承座,用螺钉11固定在水泥座上。轴承座12上装有铜螺母2和7(如图2),铜螺母2的位置由螺母3固定。1是标准丝杆,装在轴承座12上,并和铜螺母2、7相配;标准丝杆1上铣有两柴长键槽,并通过两 I plant products have a long rod, diameter Ф65 mm, length 4930 mm, pitch 12.7 mm. Logically, this long rod should be machined in a large lathe, but I plant less equipment, no lathe, so the screw processing has become the key. At the climax of the technological revolution, workers actively brains and find ways to finally create special tools for turning the long shaft. Construction of the tool: 12 is the bearing seat, with screws 11 fixed to the cement seat. The bearing seat 12 is provided with copper nuts 2 and 7 (as shown in FIG. 2), and the position of the copper nut 2 is fixed by the nut 3. 1 is a standard screw, mounted on the bearing 12, and copper nut 2,7 match; standard screw 1 milling two long wooden keyway slot, and by two