Rough turning slurry pump: Halnn Solid PCBN inserts BN-K1

Because of the bad working environment of slurry pump, in order to ensure its high hardness, high corrosion and high wear resistance, high chromium alloy cast iron is often used as the main material of slurry pump parts. Because of its high hardness after casting, it belongs to the hard and brittle material. The surface of slurry pump blank is often accompanied by casting defects such as sand holes and blowhole, and the processing allowance is not uniform, which brings a lot of difficulties to the cutting process.

Because of the high hardness of the slurry pump, the tool head needs to bear a greater impact in cutting process,which leads to high temperature and accelerate the wear of the tool head, finally the tools was frequently replaced. The tools replacement not only tool costs remain high, but also affect the production efficiency. Therefore, it is very important to select the right tool materials to process the slurry pump.

Cemented carbide cutter process the slurry pump to lead the lower efficiency reasons: slurry pump belongs to casting parts, especially big casting parts often have some questions. The cemented carbide cutter’s hardness is not high to lead to lower speed cutting and lower efficiency which not solve the process questions
Ceramic cutting tools have some characters such as high hardness, high strength, high red hardness, high wear resistance, excellent chemical stability and low friction coefficient, which can improve the process efficiency and process that cemented carbide cutter can’t process it the superhard materials. The ceramic cutting tools only are adopted in finishing processing because its brittleness leads to the tools collapse.

The hardness of Halnn BN-K1 CBN inserts not only higher than that of Cemented carbide cutter, but also Impact resistance higher than ceramic cutting tool, which can improve the high speed cutting, dry cutting to reduce the pollution.
Halnn BN-K1 CBN inserts specialized in processing the high hardness casting parts such as slurry pump, which can process the slurry pump parts in the rough turning. It not only has high hardness, high strength, better wear resistance and Impact resistance, but also high cutting speed can improve efficiency and dry cutting can produce the environment pollution, which successful break the monopoly of hard processing cast iron castings in abroad.
BN-K1 processing the slurry pump cutting parameter

A brief introduction of two customer feedback processing slurry pump case parameters as follows:

1. Halnn CBN inserts BN-K1 Grade processing the slurry pump impeller parameter:

BN-K1 CBN inserts don’t break during interrupt cutting and the cutting speed is higher than that of ceramic cutter, while the single-edge life is 7 times longer than that of ceramic cutter, which fully demonstrates the impact toughness of non-metallic adhesive CBN inserts BN-K1, greatly provides production efficiency and reduces production costs.

(2) Halnn CBN inserts BN-K1 process the end of slurry pump case parameter:
Materials

	High-Chromium Cast Iron
Peocessing Site	End Face
Inserts Type	BN-K1 CNMN120712-4S
Tool Holder type	CCLNL2525M1207
Cutting Parameter	Vc=75m/min，Fr=0.1mm/r，Ap=3.5mm

When BN-K1 CBN insert is used to process slurry pump with large margin, not only the wear resistance and impact toughness are excellent, but also the efficiency is improved. BN-K1 adopts dry cutting, which reduces the pollution of cutting fluid and the cost of treatment, and ensures the good working environment of the workshop.

BN-K1 grade CBN inserts usually process the slurry pump inserts type. Namely, tools holder type:

1. Processing the slurry pump inserts type: SNMN120712，SNMN120708，CNMN120412，RNMN120400，SNMN120412(replaced the cemented carbide cutter, ceramic cutting tool and other CBN inserts)
2. Processing the slurry pump impeller, pump body tools holder type: CSRNR3232(25*25 40*40) CSSNR3232(25*25 40*40) CCLNR2525(32*32 40*40)

BN-K1 is suitable for machine tools, including general lathes, CNC machines, vertical lathes, horizontal lathes, processing centers, etc.
Processing methods includes milling, turning and boring.

For the machine tool processing rigidity requirements are not very high, but will have an impact on the cutting depth. If the machine tool is rigid enough, the depth of the tool can be increased, and the speed and feed can also be increased. If the rigidity of the machine tool is less, the speed, the depth of the cutter and the feed rate will be reduced. However, the overall processing effect is not affected.

Halnn CBN inserts can process the following material workpieces besides rough turning slurry pump:
According to material classification: high hardness cast iron (high chromium cast iron, nickel hard cast iron, white cast iron, alloy cast iron, etc.), hard steel (high hardness steel after heat treatment, high manganese steel, wear-resistant steel,), ordinary gray cast iron (HB170-240), other difficult to process materials (aluminum, copper, ceramics, graphite, etc.).

According to industries classification: Mining Machinery, Metallurgical Roller, Construction Machinery, Automobile, Energy, Heavy Machinery, Aerospace, etc.

According to parts classification: Rolls, slurry pump housing, impeller, brake disc, brake drum, engine, gearbox, gear, gear shaft, bearing, ball screw, etc.