Finish turning Synchronizer with CBN inserts
Category：News
PublishedDate：2017-12-28
Synchronizer, as one of important machine of gearbox, we usually use heat treatment obtain good performance. The hardness will reach about HRC60, because the performance will easily change, we need to ensure the surface quality and size dimension.
Halnn Superhard, with more than 10 years experience on brittle hard materials, have researched so many cbn inserts grades for hard turning. And specific for hard turning synchronizer, Halnn researched 2 types PCBN Inserts BN-H10 and BN-H20 Brazed PCBN Insert, and the tools life and efficiency are better than other pcbn in the market.
The following is one application case for hard turning synchronizer:
Basic Information:
Workpiece Materials:20CrMnTi,
Diameter:φ160mm,
Grooves Width:10mm,
Roughness requirements:Ra0.8(can reach Ra0.4),
Hardness after quenching:About HRC60
(1) CBN Grooving Insert(BN-H10): Clearance angle 7°，Negative declination 7°；Cutting Speed Vc=90~120m/min, Feeds Fr=0.08mm/r, We can grind about 350 pcs components, and it has good toughness and shock resistance, and mainly used for the machine tools with not good rigidity.
(2) Indexable CBN Insert (BN-H10): We can use VNGA160404, the cutting speed will be about 1700m/min, Fr=0.1mm/r,ap=0.15mm, the lifetime will be about 5 times of ceramic inserts.
Above pcbn inserts can be made as customized requirements. The Forming tools can be grinding many times, is suitable for some Flexible production line. And the indexable insert has high efficiency, and is more suitable for Rigid production line. We can choose the suitable cbn inserts type depending on the groove size, working allowance and machine tool condition to help the customers improve the efficiency.