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High-speed steel rolls CBN inserts speed optimization: Efficient turning and grooving!

Advantages of NC Lathe in Machining High Speed Steel Roller

(1)It can accurately process the responsible curved surface which can not be machined by traditional machine tools, the positioning of the groove is accurate, and the upper and lower grooves match well, which can avoid the phenomenon of broken roll caused by stress concentration caused by unqualified roll processing, and avoid the problem of incorrect positioning of groove at the same time.

(2)The automation of processing can be realized, and the production efficiency can be greatly improved. at the same time, centralized processing of multiple processes can be realized, frequent handling of machined parts between machine tools can be reduced, and automation of single-piece and small batch production can be realized.

(3)With automatic alarm, automatic monitoring, automatic compensation and other self-discipline functions.

(4)Its accurate positioning can broaden the way for the application of the new technology on the rolling line.

Introduction of slotting tool for High Speed Steel Roller

High-speed steel rolls are divided into new roll pass processing and repair roll pass processing, which are introduced below.

For high-speed steel new roll slotting: because of the large groove machining allowance and large contact area, it will lead to short tool life and low efficiency, so the integral polycrystalline CBN insert can be directly used to remove the machining allowance and improve the machining efficiency. It is recommended to use BN-S300 material or BN-S20 material, and choose RCMX-V series or RCMX-Y series integral CBN inserts.

For the slotting of the high speed steel repair roll: due to the work hardening phenomenon of the high speed steel roll, especially the processing of the pass of the finished ribbed steel bar is more difficult, for the round steel finished roll, the polycrystalline CBN insert BN-S300 material can be used, and if there are cracks or blocks in the groove, the BN-S20 material will be selected. for the ribbed steel repair roll, it belongs to intermittent cutting because of the existence of crescent groove transverse ribs. It can be processed with integral polycrystalline CBN insert made of BN-K1 material without knife collapse.

At the same time, if the customer chooses the welded turning tool, the Arbor can be provided to allow the supplier of the super-hard tool to weld the superhard material at the edge of the Arbor to improve the production efficiency.

Introduction of cutting parameters of High Speed Steel Roll slotting

The selection of cutting parameters is mainly based on the machining efficiency and the actual situation of breaking. The roll pass of high-speed steel has a great influence on the quality of finished products, productivity of rolling mill, equipment safety, production cost and so on. Therefore, it is necessary to be careful in selecting cutting parameters.

Among them, the spindle speed is an important parameter that affects the machining surface quality, and the higher the speed, the easier it is to achieve better surface quality of the machined workpiece.

Rough machining process: the cutting speed (Vc) is controlled between 50-150m/min, the feed rate (Fr) is controlled between 0.1-0.5mm/r, and the cutting depth (ap) is between 1-10mm.

Finishing process: it mainly ensures its dimensional accuracy and surface finish, so the cutting speed (Vc) is controlled between 90-250m/min, the feed rate (Fr) is controlled between 0.005-0.35mm/r, and the cutting depth (ap) ≤ 1mm.

Field picture of high speed steel roll slotting