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Multi Angle Drill Bit
Auto Install - Using unibit for drilling and close quarter right angle drill
Find out more about Multi Angle Drill Bit below
Automotive Manufacturing: Machine Tool Application Case by mingming
  In recent years, the Great Wall company car engine plant with the world's leading machine tool manufacturers of high-speed, high-performance machining center set up three flexible machining production line, with world-renowned tool manufacturer Kennametal Inc. with the United States, combined with carefully selected products of the processing tools, is working to high-speed and efficient cutting.
(1) KSCM-AluMill face milling cutter
In the cylinder block and cylinder head production line, we will Kennametal KSCM-AluMill face milling cutter for aluminum alloy cylinder block and cylinder head milling plane. This tool by the steel and aluminum cutter knife body composition, in ensuring sufficient rigidity under the premise of reducing the weight, and the bi-metallic structure also reduces machining vibration. The tool has a high metal removal rate, low processing burr and high processing efficiency and other characteristics, is ideal for high-speed cutting. KSCM-AluMill side cutter, 5 different types of knives folders, each folder with a different knife for rough milling and fine milling can be achieved by different surface roughness can also be installed at the same time coarse milling and fine milling cutter folders, rough finish once completed, to shorten processing time and improve work efficiency.
We will use the actual processing as applied to processing of low-silicon aluminum alloy with high wear resistance, high life KD1415 and KD1420 two kinds of PCD cutting material turner. KD1415 blade hardness, suitable for machining allowance, uniform, consistent hardness of the surface, therefore be used for cylinder block, cylinder head from top to bottom and front and rear surface of the finish; KD1420 knife folder, blade toughness is better does not apply to margin uniform, consistent hardness of the surface, be used for roughing. After finishing, cylinder block, cylinder head on the following, front and rear flatness and other large plane is not greater than the greatest error of 0.02mm, the smallest to 0.0034mm, the average flatness error of less than 0.01mm, the surface roughness of less than Ra0. 8, processing of the beat meet the requirements. KSCM-AluMill face milling cutter replacement folder, only to do axial adjustment, no radial adjustment, with easy to adjust, adjust the time is short and adjust the characteristics of high accuracy, the actual use of the Great Wall, when the company realized the axial deviation adjustment is greater than 0.003mm, so that the load being evenly distributed to each cutting tooth on the blade, effectively extending tool life. After several months of trial processing, KSCM-AluMill face milling aluminum alloy processing good effect.
To name a cylinder top, bottom fine milling, for example, the top fine cutter plate Φ100, Z12 (9 Ge precision cutter folders, knife folders 3 Revised), revised the amount of light 0.008 +0.002 mm, the overall welding PCD blade; machining parameters : V = 2500m/min, fz = 0.12mm / z, Vf = 11.5m/min; precision milling test pieces after the fact, the surface roughness Ra0.8, flatness error "0.004, beats meet the requirements. Bottom fine cutter plate Φ200, Z24 (18 Ge precision milling folders, knife folders repair 6), processing parameters: V = 2500m/min, fz = 0.12mm / z, Vf = 14.3m/min; processed real-test pieces, surface roughness Ra0.8, flatness <0.004mm, beat meet the requirements.
(2) Composite Cutting Tools
Complex processing is to improve the processing efficiency of a very effective means of processing the contents of a few to use a knife in a processing completed, reducing tool change times, saving the overhead time, improve production efficiency. Ladder drill is the simplest and most common type of complex cutting tools, with chamfered edge of the drill is the most simple ladder drill. In the cylinder block, cylinder head machining holes, the holes need to chamfer drilling have chosen such a simple ladder drill, and achieved good results. For example, Kennametal straight slot 180 ° apex angle TX ladder drill, drill, when radial force is almost zero, four straight-edge along the circumference with a symmetrical distribution, the direction is good, the role of both repair light, so that drilling straightness and location of the degree to be substantially increased. Holes of cylinder and cylinder head, the choice of another drill bit is the circumference of a composite uniform three cutting edge of TF bit, it coring drill bit thicker than the 2-edge, high strength and toughness to make up the difference between carbide weakness; tip front-end special shapes, automatically centering, without processing center hole; cutting edge so that each turn feed more than the amount of increase (when the cut aluminum up to 20m/min), high intensity, can be high-speed cutting (cutting aluminum When up to 1000m/min), thus substantially reducing the processing time and improve the processing efficiency, especially suitable for deep hole machining, dimensional accuracy of up to H9, position accuracy up to ± 11μm, roughness Rz20 ~ 25.
In the Great Wall crankshaft production lines, selected Kennametal Solid Carbide SE ladder drills, and general high-speed steel drill hole compared to a higher roundness, high-speed steel drill hole roundness can reach 20μm, while the SE drill Roundness drilling is only the former is 1 / 5. In accordance with this hole shape precision, we can fully consider replacing the reaming process, in some occasions, and even less demanding alternative hinge hole (such as extrusion screw thread Bottom). This bit is characterized by a shorter horizontal edge grinding can reduce the axial force of nearly 50%; coring near the anterior horn is positive, it is more sharp cutting edge; trough of parabolic type, drill core thickness greater bit intensity higher, stronger rigidity; the two fuel injection cooling holes, the cooling conditions are good; arc-shaped cutting edge and chip removal groove layout is reasonable, broken into small pieces to facilitate the smooth chip discharge. Before and after the end of the drill hole for the crankshaft to good effect.
(3) Precision Hole Machining Tool
The rapid development of modern industry, the size of the hole precision, geometry and surface roughness, presented a higher demand, particularly in the automotive industry, which called for high-precision they require large quantities, thus the urgent need for efficient precision holes machining tool. Diamond Reamer is to adapt to this need and developed a sophisticated tool. In the cylinder head production line such as catheters and Seat Bottom station, using multi-blade as a whole welding Kennametal PCD reamer; Cylinder location of the finishing holes, using split Bencere Kennametal Indexable PCD reamer, to achieve high efficiency cutting, give full play to the performance of high-speed machining center, greatly improving the processing efficiency. On-site sampling tests and some of the actual product? 8,? 10 and? 13 three-hole size changes within the range of 0.014, size, accuracy of the maximum error tolerance of less than 60%, the average error is less than 0.005mm, the hole surface roughness
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