The lathe fixture structure characteristic and using methods

Lathe fixture to determine the correct position of the workpiece on the lathe, and clamping workpiece, occupies very important position in the cutting process. Common lathe clamp are: 1) Universal fixture. Such as three jaw chuck, four jaw chuck and various forms of plunger, etc. 2) Adjustable fixture. Such as group clamps, modular fixture, etc. 3) Special fixture. To meet an artifact of a process and the actual use of fixture, such as rotary tool post, etc. In production, to ensure product quality, improve production efficiency, reduce labor intensity, should be correct selection and use of the fixture. Improve the machining accuracy, ensure the quality of products in the lathe fixture is to ensure that parts processing technical requirements stipulated by the dimensional accuracy, surface roughness and the relative position between the various surfaces of the precision of the important measures. Correctly choose the lathe fixture is to choose suitable fixture manufacturing precision and structure. Such as to ensure parts processing surface and the datum of coaxial degree requirements, a variety of automatic centering fixture can choose: requirements for coaxial degree is low available three jaw chuck, four jaw chuck, high available soft claw on the coaxial degree requirements, cone mandrel, circlip and liquid plastic fixture, etc. Improve the labor productivity in the form of a certain structure of jig, can significantly improve the efficiency of production. In production, usually adopt the following structure forms of fixture to improve productivity: 1) The fast clamping and remove the jig, can shorten the assistant time, and reduce the labor intensity of workers. 2) Using special locations, is a special fixture, can shorten the time of the adjustment and correction. 3) Adopting several clamp, two clamping multiple parts can be processed, shorten the individual production time. 4) Adopts the automatic control of jig, such as hydraulic copying or program control, which can realize more than one machine operation. Give full play to the performance of the machine adopts special fixture can enlarge the using range of machine tool, one machine can be achieved. Is like an ordinary lathes if equipped with a special rotary tool rest can processing ball, if equipped with a clapper box can processing blade profile. 2, due to the lathe fixture lathe fixture structure is on the case, even the high-speed rotating case work, so the fixture requirements of small size, light weight, rotate to balance and ensure safety. Clamp the specific connection matrix of each element connected to the machine. The general says this kind of element for the disc or disc. Locations to determine the parts in the jig location of the element. Such as locating pin, positioning ring, v-shaped blocks, etc. Clamping piece fixed component parts. Such as pressure plate, bolt, nut, etc. Connectors to connect the components with the screws, pins, washers, keys, etc. Other components such as the knife block, measuring block, counterweight, dividing device, locking device, transmission device, etc.