Surfaces suitable for turning include: diameter and cylindrical surfaces, tapered surfaces, spherical surfaces and threaded surfaces.

1. Diameter and cylindrical surfaces

Turn processing is suitable for diameter and cylindrical surfaces. For diameter surfaces, the turning tool is held parallel to the axis and cuts material from the workpiece to a certain diameter. If a workpiece with a different diameter is required, the turning tool will need to be replaced. For cylindrical surfaces, the turning tool is perpendicular to the axis and cuts material from the workpiece to length. This processing method is suitable for manufacturing shaft parts, such as bearings, gears, etc.

2. Spherical surface

Spherical surface is the surface of a sphere. Spherical turning is to process the sphere on a lathe and adjust the surface of the sphere to the required diameter and precision. Spherical turning is widely used to manufacture spheres and spherical parts, such as ball joints and mechanical swing arms.

4. Thread surface

Threads are surface features with a spiral shape and are common parts in the automotive, electronics, aerospace and other industries. Thread turning is the cutting of threads by rotation and feed. A thread lathe is required to machine various types of threads. The turning method is suitable for many different surfaces. It uses the rotation of the turning tool and the feed of the workpiece to cut the required shape on the surface of the workpiece.

Introduction and working principle of turning process:

1. Process introduction

Lathe processing mainly uses turning tools to turn rotating workpieces. Drills, reamers, reamers, taps, die and knurling tools can also be used on lathes for corresponding processing. Lathes are mainly used to process shafts, discs, sleeves and other workpieces with rotating surfaces. They are the most widely used type of machine tool processing in machinery manufacturing and repair factories.

2. Working principle

The workpiece rotates, and the turning tool performs linear or curved cutting processing in the plane. Turning is generally performed on a lathe to process the internal and external cylindrical surfaces, end surfaces, conical surfaces, formed surfaces and threads of the workpiece.

During turning, if while the workpiece is rotating, the turning tool also rotates in the same direction as the workpiece at a corresponding speed ratio (the tool speed is generally several times the workpiece speed), the turning tool and the workpiece can be changed. The relative motion trajectory can process workpieces with polygonal cross-sections (triangle, square, rhombus, hexagon, etc.).