Boring is generally a process used for hole machining. This machining process is relatively common in CNC machining, and turning is also a relatively common machining process. This article describes the difference between boring and turning.

What is the difference between boring and turning?

  1. Different concepts

Boring is a cutting process that uses a tool to enlarge the inner diameter of a hole or other circular contour, while turning is lathe processing. Lathe processing mainly uses turning tools to turn rotating workpieces.

  1. Different sizes

Boring is the use of a rotating single-edged boring tool to expand the pre-made hole on the workpiece to a certain size. Turning is a cutting process in which the turning tool moves linearly or curvedly in a plane.

  1. When using different boring methods, the workpiece is installed on the machine tool table or machine tool fixture, the boring tool is clamped on the boring bar (it can also be integrated with the boring bar), and is driven and rotated by the spindle. When a boring die is used, the boring bar and the spindle are connected in a floating manner, and the machining accuracy depends on the accuracy of the boring die; when the boring die is not used, the boring bar and the spindle are rigidly connected, and the machining accuracy depends on the accuracy of the machine tool. Turning uses different turning tools or other tools on the lathe, which can process various rotating surfaces, such as internal and external cylindrical surfaces, internal and external conical surfaces, threads, grooves, end faces and formed surfaces, etc. The processing accuracy can reach IT8 to IT7, and the surface roughness The Ra value is 1.6~0.8. Turning is often used to process single-axis parts, such as straight shafts and general disc and sleeve parts.

What are the characteristics of boring?

  1. The tool has a simple structure and the radial size can be adjusted. Holes with different diameters can be processed with one tool.
  2. It can correct the axis deflection and position error of the original hole.
  3. Since the boring machine has many forms of movement and the workpiece is placed on the workbench, the relative position of the processed hole and the tool can be adjusted conveniently and accurately, thus ensuring the mutual positional accuracy of the processed hole and other surfaces. 4. The quality of boring holes mainly depends on the accuracy of the machine tool and the technical level of the workers, so the technical requirements for the operators are relatively high.
  4. Compared with reaming, single-edged boring tools have poorer rigidity and require smaller cutting amounts, so productivity is lower and it is difficult to ensure stable machining accuracy.
  5. It is not suitable for processing slender holes.

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