We can solve the problem of improving cutting production efficiency by determining the back feed (or side feed). On the premise of ensuring the quality of the machining surface, the back cutting amount (ap) should be determined based on the stiffness of the machine tool, workpiece, and tool. Under the allowable stiffness, the back cutting amount should be as equal as the machining allowance of the workpiece as possible, which can reduce the number of tool passes and improve production efficiency.

We can start from the following aspects on how to choose the cutting tools required for mechanical processing:

1. When machining curved parts, in order to ensure that the cutting edge of the tool is tangent to the machining contour at the cutting point and avoid interference between the cutting edge and the workpiece contour, a ball end cutter is generally used, a double-edged milling cutter is used for rough machining, and a four edged milling cutter is used for semi precision and precision machining;

2. When milling larger surfaces, in order to improve production efficiency and improve surface roughness, a disc milling cutter with embedded blades is generally used;

3. When milling small flat or stepped surfaces, a universal milling cutter is generally used;

4. When milling keyways, in order to ensure the dimensional accuracy of the groove, a double-edged keyway milling cutter is generally used.

5. Selection of hole machining tools.

When drilling, due to the rigidity of the drill bit and poor cutting conditions, the selection of drill bit diameter D should meet the condition of L/D ≤ 5 (L is the drilling depth); Before drilling, use a center drill to position the hole to ensure the positioning accuracy of the hole processing; Before precise twisting, a floating cutter can be used, and the hole opening should be chamfered before twisting; When boring holes, symmetrical multi blade boring tool heads should be selected as much as possible for cutting to balance boring vibration; Try to choose thicker and shorter tool holders to reduce cutting vibration.

The above is an explanation of how to choose the cutting tools required for mechanical processing, hoping to be helpful to everyone. Cutting tools are very important accessories in mechanical processing, and how to choose the appropriate tool directly affects the quality of the machined workpiece. Therefore, if you want the quality of the machined workpiece to be good, you need to start with tool selection.