Halnn Superhard Materials Co.,Ltd
Halnn Superhard Cutting tools has the technology to process the slurry pump and its parts With the high-speed development of Chinese economy. A variety of light and heavy industry rose and developed quickly,slurry pump demand is also increasing, how to manufacture and process an excellent performance in all aspects of slurry pump became the goal of continuing to explore contemporary academia . This article describes the usage and material, and the tools which suit for processing the of slurry pump parts. Part 1 The usage and the material of the slurry pump Slurry pump can also be called centrifugal pump, it is a equipment which use the rolling power of the centrifugal pumps impeller with the help of the is the role of the rotating pump impeller to increase the energy with mixing solid and liquid media, and convert electrical energy into kinetic and potential energy of the medium. As slurry pun works in poor conditions, commonly working in strong acid, alkali or other corrosive substances environment, leading to short life, for obtaining a longer life of slurry pump, we used in high strength and hardness, corrosionresistance and and strong high-chromium alloy cast iron as the main material of the slurry pump, such as Cr15Mo3, Cr15Mo2Cu,KmTBCr12, Cr20, Cr26,etc. The hardness of the High-chromium alloy can reach about HRC60, it is one of the best current performance wear-resistant materials, mainly widely used in mining, electricity, metallurgy, coal, transport and environmental protection industries which abrasive slurry containing solid particles. Slurry pump named differently with its different environment it works, as in the coal washing industry, sea and sand dredging election and other fields, also known as mud pumps, mud pumps, etc. Part 2 Technology to process the slurry pump parts There are many Slurry pump parts, the main components includes impeller, shaft, jacket, front fender, rear fender, pump casing and shaft seal devices. the role of the impeller is transmitting the original motivation of the mechanical energy to the liquid directly, for increasing the static pressure energy and kinetic energy (mainly increase static pressure)of the liquid. The shaft sealing device is used for preventing the liquid in pump housing leaky along the axis or ambient air leaking into the pump housing. The technological process of the Impeller: Rough turn import port ring and front panel----Pure front mouth ring and inner hole(Ensure the concentricity requirement)----Insert keyway (guarantee the keyway symmetry degree)----Drill Impeller balance holes(uniform size distribution)---Test (balance test)--- Checkout. The technological process of the pump shaft: Rough turn----heat treatment (quenching)---- Half finished turning---- finish machining---- external grinding---checkout.
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Halnn Superhard Materials Co.,Ltd
Slurry pump impeller is the only working part, it is often made of Cr26 as the main material. impeller has 5~12 blades, it is difficult to process when using the lathe. One of the seasons is Cr26(high chrome cast iron) has a high hardness after casting, and some large castings casting defects usually happened, such as white, hard particles, etc. ; the second season is the impeller need to intermittent cutting wheel, which adds to the difficulty of processing. Part 3 How to choose the cutting tools for processing slurry pump There are three types of tools to processed slurry pump parts on the market today: carbide-tipped tool, ceramic cutting tools and cubic boron nitride cutting tools. Personally CBN tool is the most suitable for processing slurry pump components. Since the slurry pump parts has a high hardness after manufacturing or heat treatment, so it is difficult to process. Machinery Manufacturers earliest used the carbide cutting tools for machining slurry parts, but due to the carbide cutting tool is not hardness enough, uneven surface will be happened when processing the slurry pump parts especially the large-scale processing of casting, being casting defects. carbide Tool wear out fast when processing, is necessary to change a new still not finish one part, impacting the processing efficiency and cutting tool costs high. So as the ceramic cutting tools, it is unnecessary to explain it again. You can choose ceramic cutting tools if you precision process the small feed part and ignore the whole benefit of your company. These two tools are not a good solution to the problem which difficult to process slurry pump, then we developed a cubic boron nitride cutting tools(CBN). Halnn Superhard developed non-metallic adhesive superhard cubic boron nitride cutting tools BN-K1 grade, so process the rough slurry pump parts came into reality. In terms of the hardness: Halnn Superhard BN-K1 grade=conventional CBN tools> Ceramic knives> Carbide Tool; For the toughness: Halnn Superhard BN-K1 grades>Traditional cubic boron nitride cutting tools> carbide Tool>Ceramic tool; Halnn super hard tools, the pioneer in Superhard tools, the leader of professional hard materials processing tool, the domestic first proposed roughing "CBN overall polycrystalline Blade" concept, non-metallic adhesive cubic nitride boron tool widely used in high hardness materials, high hardness work piece after heat treatment, and other difficult to cut materials, parts and other fields, moreover it also break the monopoly of foreign materials which has high hardness processing difficultly, enjoyed a high reputation Superhard cutting tool in academia . The advantages of Halnn non-metallic binder CBN super-hard tools BN-K1 grades: compared with carbide tools, it has a high hardness, good wear resistance; compared with ceramic cutting tools www.halnntools.com
Halnn Superhard Materials Co.,Ltd
and conventional cubic boron nitride cutting tools,it has Anti Shocking, can be intermittent cutting impeller slurry pump parts. Here's a brief of Halnn super hard tool process slurry pump parts(impeller) case. Part 4 The slurry pump impeller̢۪s machining case from Halnn Superhard non-metallic binder CBN tools BN-K1 grades Materials: high-chrome cast iron Cr26; Manufacturing processes: Turning cylindrical, face; Tool grades: BN-K1 grades; Cutting data:Vc= 75m min,ap=2.5~5mm,Fr=0.1mm/r; Processing methods: intermittent cutting;dry cutting. Processing effect: When turning the impeller,as there are 5-12 blades on impeller,the cutting Tool will bear 5~12 times impacting when the impeller rolls per round. BN-K1 grades CBN tool cutting process intermittently does not produce fractured, and the BN-K1 grades cutting speed of Halnn super-hard non-metallic binder cubic boron nitride(CBN) tool speed is higher than the ceramic tools, at same time the life of the single Blade is seven times than ceramic tools, showing the impact resistance of non-metallic binder cubic boron nitride(CBN) cutting tools well, not only reduces the cost of the tool, turning efficiency is also improved.
Cutting tools Grade
Cutting Speed
Life of single blade
Wear degree
Halnn BN-K1
75m/min
7 pieces/per blade
Normal wear
35m/min
1 piece/per blade
Other brand cerami c cutting tools
Crash damage fra cture
Part 5 Conclusion With the continuous development of modern technology, machinery manufacturers are trying to make a better working life of the workpiece,just like slurry pump industry are also using more corrosion resistant high chrome cast iron as the main material, this is a challenge to the cutting tool field, in the face of the case, there is no way except developing high-quality high performance and efficiency tool material, so that we can follow the development of the times.
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