High speed cutting of brake disc assisted by Halnn CBN tools
Category：News
PublishedDate：2019-01-02
With the vigorous development of the auto industry, the brake disc products are increasing every year, especially large firms
with their monthly products meet hundreds of thousands of left and right sides, adopt assembly line processing way to
improve the machining efficiency, consequently higher quality requirements for machine tool, cutting tool and other products,
especially the direct contact and removal of the cutting tool machining allowance, in the condition of high speed cutting is not
only to ensure the quality of brake disc products, have a long tool life, in order to ensure the efficiency of ascension.
Requirements for brake disc processing technology and quality
Brake disc processing technology: casting - rough machining - finishing - drilling - inspection warehousing.
Brake disc as the main parts to ensure the safety of the car, with the development of the automotive industry, the quality of its
products requirements are more stringent, such as the tolerance of two brake surface requirements within 0.009mm, surface
roughness to Ra1.6, parallelism requirements within 0.04mm, beating requirements within 0.025mm
Tool material for high speed machining brake disc
At present, the cutting tool materials for processing brake disc on the market are: traditional carbide tool, coated carbide tool and
CBN tool. Among them, only CBN tool can achieve high-speed machining, and the performance is higher than traditional carbide
tool and coated carbide tool. It is the first choice for high-speed machining brake disc.
(1) the hardness of CBN tool is high, so that the wear resistance is good, is 15-20 times of the carbide tool.
(2) can withstand high speed cutting, the maximum linear speed can reach 1500m/min;
(3) CBN tools can complete finishing and roughing with high efficiency and low cost
(4) CBN tool adopts the method of dry cutting, without adding cutting fluid, chip is easy to be recycled and processed, more in
line with the "green manufacturing";
(5) CBN tool can help CNC lathe really realize high-speed cutting brake disc.
Halnn, has long been aimed at the brittle hard material (cast iron and steel) processing CBN tool and high grade diamond as the
research direction, in the high-speed machining brake disc segmentation field has advantages.In particular, Halnn recently
developed a new CBN material BNK30, which can be used for high-speed machining of brake disc at the cutting speed of 500-2000min.
|
Parameters of high speed machining brake disc with the CBN tool from Halnn |
 |
Workpiece material：HT250(FC250)
Workpiece hardness：HB180-241
Workpiece size：φ434
Surface finish：Ra1.6 |
|
tool material |
type |
Cutting parameters |
Tool life（pcs） |
|
Cutting Speed(Vc)（m/min） |
Feed Rate(Fr)（mm/r） |
Cutting Depth(ap)（mm） |
|
Halnn BNK30 |
CNGA120416 |
681 |
1.0 |
1 |
100 |
A company
CBN tool |
CNGA120416 |
681 |
1.0 |
1 |
145 |