1. Selection of blade (cutting tool)

The selection of blades or cutting tools should consider the following aspects

1. The processed workpiece materials include steel materials (carbon steel, low alloy steel, tool steel, stainless steel, heat-resistant steel, etc.), non-ferrous metals (copper, aluminum and their alloys), complex materials, and plastics.

2. The material properties of the processed part include performance, toughness, organizational state, etc.

3. The types of cutting processes are divided into turning, milling, boring, and drilling; Processing, ultra precision machining; Inner hole, outer circle, plane, groove; Cutting flow status, tool displacement time interval, etc.

4. The geometric shape of the workpiece affects continuous or intermittent cutting, as well as the angle of tool entry or exit. Part accuracy (dimensional tolerance, geometric tolerance, surface roughness) and machining allowance.

5. The cutting amount of the blade (tool) (back feed, feed rate, cutting speed)

6. Production site conditions (operation interruption time, feed rate, cutting speed)

7. Batch production of processed workpieces. Economic life of blade (cutting tool)

2. Selection of Boring (Inner Hole) Tools

The main issue with the selection of boring tools is the stiffness of the tool bar, which should be prevented or eliminated as much as possible. The key points to consider are as follows:;

1. Choose a larger diameter of the reverse rod as much as possible, close to the diameter of the boring hole.

2. Try to choose a shorter tool arm (working length) as much as possible. When the working length is less than 4 times the diameter of the tool bar, a steel tool bar can be used. When machining holes with high requirements, it is best to use a hard alloy tool bar. When the working length is 7-10 times the diameter of the tool holder, the small hole is made of hard alloy tool holder, and the drilling is made of shock-absorbing tool holder. When the working length is 7-10 times the diameter of the cutter bar, a shock-absorbing cutter bar should be used.

3. The main deviation angle is greater than 75 °, approaching 90 °

4. Choose uncoated blade varieties to reduce the cutting arc radius and tool tip radius.

5. For precision machining, positive cutting edge (positive rake angle) blades and tools are used, while for rough machining, negative cutting edge (negative rake angle) blades and tools are used.

6. When boring deep non drilled holes, cooling measures should be taken, and compressed air (air cooling) or cutting fluid (chip removal and cooling) can be used.

7. Choose the correct and fast boring tool handle fixture.