Page 16 - 《橡塑技术与装备》英文版2025年12月

HINA R&P TECHNOLOGY AND EQUIPMENT

Table 2 Boring Tool Cutting Parameter Test
Serial Number Rotational Speed/min Feed/Rotation Cutting Depth/mm Cutting Time/min Surface Roughness
1 50 0.15 0.03 80 Ra3.2
2 70 0.2 0.03 60 Ra2.1
3 80 0.2 0.03 56 Ra1.6
4 100 0.25 0.03 53 Ra1.2
5 120 0.2 0.03 50 Ra0.9
6 160 0.2 0.03 47 Ra0.8
7 200 0.18 0.03 45 Ra0.5
8 240 0.2 0.03 30 Ra0.6

strength in processing technology, but also provides valuable climbing to over 970,000 yuan.
experience and confidence for us to face more challenges in the In addition, the novel self-made cutting tool we adopted
future. utilizes boring instead of grinding for machining, and its
application has not been limited to the processing of machine
3 Effects and economic benefits barrels. This technology has also been successfully applied to
Through carefully selected coated three-sided the machining of complex rotor inner holes (see Figure 11).
milling inserts, combined with the meticulous design and In this application scenario, each rotor can save 40 hours of
manufacturing of specialized tools, we have successfully grinding time on a CNC vertical lathe. Based on the same
implemented a machining method that replaces grinding cost calculation method, the cost reduction and efficiency
with boring. The introduction of this method has not only improvement for a single rotor also amounts to 10,800 yuan.
significantly improved machining efficiency but also achieved To date, we have used this machining method to process 74
unprecedented machining quality, truly achieving a processing rotors of 7 different models, resulting in a cumulative cost
effect that combines efficiency and high precision. It is worth reduction and efficiency improvement of over 799,000 yuan.
mentioning that this technology has also filled the technical This undoubtedly proves that our new method is not only
gap in the field of machining where boring replaces grinding technologically advanced but also economically superior.
in the shape of an "8", which undoubtedly greatly affirms our
technical strength (see Figure 10).

Figure 10 Barrel machining

Initially, it took up to 44 hours to process a barrel.
Now, with our new method, the processing time has been
Figure 11 Rotor body
dramatically reduced - by over 1,000%. Based on the cost of
270 yuan per hour for a CNC vertical lathe, each barrel can 4 Conclusion
now save 40 hours of processing time, which directly translates The "boring instead of grinding" manufacturing
to an economic cost savings of up to 10,800 yuan per barrel. optimization project for the barrel of large extrusion
For each granulation unit, which comprises nine barrels, the granulation units is undoubtedly a profound innovation
total savings can amount to over 97,000 yuan. So far, we have and breakthrough in traditional manufacturing processes.
used this processing method to complete the processing of The successful implementation of this project has not only
10 sets of granulation units, with the cumulative cost savings significantly improved the surface quality and dimensional

·10· Vol.51，No.12