High-precision clamp for lathe

Abstract

The invention provides a high-precision clamp for a lathe. The high-precision clamp for the lathe comprises an expansion chuck 1, a core shaft 2, a connection rod 3, an air cylinder 4, a filling agent 5, a gasket 6, a nut 7, a rotary sealing valve 8 and a machined workpiece 9. According to the clamping way, gel is squeezed through the air cylinder to expand the chuck, and the expansion chuck is more uniform in stress and smaller in circular runout due to the fact that force is transferred through the gel; the circular hole type workpiece can be effectively clamped, deformation of products, particularly thin-wall products is ensured, the circumference precision of turning can be ensured to a great degree, and product clamping deformation is reduced. Meanwhile, since the air cylinder is adopted for controlling the expansion chuck, rapid loading and unloading for the workpiece are achieved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a high-precision fixture for a lathe. Background technique [0002] Usually, various fixtures are required during machining. When machining workpieces with round holes, three-jaw chucks or collets are usually used for clamping. Since the three-jaw clamping is three-point contact, the workpiece will be deformed. Circumferential beating is out of tolerance, so the existing three-jaw chuck cannot meet the clamping requirements of some high-precision products. Because the spring chuck is manually locked and expanded, the locked state of the expanded drum every time is forced. The size may affect the runout of the workpiece. And these two kinds of methods all are to adopt manual operation, inefficiency. Contents of the invention [0003] The invention proposes a high-precision fixture for lathes, which can effectively clamp round-hole workpieces and ensure the deformation of products, especially for thin-walled products, which c...

Images