diamond cutter in the hole machining pay

 Diamond tool manufacturers say that the saying goes: "not good goods cheaper, better goods are not cheap", on the  diamond blade circular saw other commodities that may true, but I am afraid that the tool tool is not at all clear; key is to match. On the job site of many factors: cutting objects such as equipment, quality requirements, quality of personnel and so on. Comprehensive assessment, sensible manner, the best use, just right, in order to save money, reduce costs, participation in the competition in the industry. This depends on the mastery of professional knowledge and understanding of information of similar products.
 In machining, drilling about its processing total of 1/3. Holes are semi-enclosed cutting, therefore, chip, heat diffusing, cutting fluids are more difficult to cast, and processing difficult. With scientific and technological advances in machinery parts, precision of the hole and surface roughness increasing demand, while the precision bore machining production often become critical, must be resolved.
Hole machining techniques should be used when processing research equipment and machine tools (so-called hardware), but also to study how to effectively use the equipment better application technology (the so-called software).
Definition and classification of the hole
What is a hole? According to the national standard GB1800-1979 requirements: Hole mainly refers to the cylindrical inner surface. Seen, refers broadly inclusive face hole. Holes are usually classified according to the following method:
(1) according to the shape of points. There cylindrical bore, tapered bore, drum-shaped hole, polygonal hole, spline holes and other shaped holes and special-shaped hole (such as bending holes) and so on. Among them, the most widely used cylindrical hole.
(2) According to the shape of points. A through hole and the blind hole (blind hole); hole (refer to the hole depth L and the diameter D of the hole than 5, L / D short depth to diameter ratio or aspect ratio; L / D = 5 ~ 20 are generally Deep, L / D> 20 ~ 30 is a medium deep, L / D> 30 ~ 100 called special deep) and shallow hole.
(3) according to the size of the aperture. A large hole (D> 100mm), common holes (D = 10 ~ 100mm), holes (D = 1 ~ 10mm) and micropores (D <1mm hole).
(4) according to the processing mechanism to points. There are machining, special processing, mechanical and electrical composite processing. Despite the special processing method more, but 4 inch saw blades  because the equipment is more expensive and processing efficiency is not high reason, either now or in the foreseeable future, conventional machining process will continue to be the primary means of holes.
(5) Press the machining precision points. With coarse holes (such as drilling and boring after a rough hole), semi-fine holes (such as reaming, thick hinge, semi-fine boring holes) and precision holes (such as precision hinge, finely drawn, grinding, honing, grinding holes), etc. Precision holes usually refers to the IT7 ~ IT6 tolerance level or above, the surface roughness Ra <0.8 ~ 0.4m hole in its geometric shape accuracy (eg roundness, cylindricity, straightness axis, etc.) General provisions in its dimensional tolerances with 1/2 to 1/3 range.
As aerospace, automotive, high-speed trains, wind power, electronics, home appliances, energy, mold, hydraulic, machine tools and precision machinery equipment manufacturing industry rapid development and upgrading of products, precision hole applications is increasing. Such as a hydraulic system widely used in a variety valve hole, high-pressure cylinder tube are some typical precision holes. Hole machining due to its own characteristics, processing more difficult, but more difficult machining precision holes.
Hole machining characteristics
Hole machining is a more complex process, the processing chip must be properly resolved, cooling and lubrication and guidance and other issues. Holes main features are:
(1) Due to the workpiece aperture size, length and shape constraints, the cutting tool corresponding slender, rigidity, and most of the cantilever clamping manner, the processing likely to cause deflection and vibration of the tool.
(2) difficult to eliminate chips. To improve the conditions of the chip and chip, the chip is bound to increase the groove, but this will make the lower strength and stiffness of the tool.
(3) difficult to introduce cutting fluid to the cutting area, the chip, between the tool and the workpiece hole wall friction is large, the cutting temperature is high, particularly in deep holes. Therefore, the cutting fluid in the hole machining has a special role. Cutting fluid rational selection and proper use of hole machining quality, tool life and cutting efficiency have a great impact.
Holes commonly used methods of cutting liquid supply pressure casting method and cooled French. The former is the most simple, but poor results for the fluid and cutting fluid consumed in large quantities. Internal cooling method used for hole drilling, deep hole drilling, ejector drilling, nesting knife and single edge boring reamer hole cutting tools, the need to make the tool for the fluid pressure within the cooling (oil) passage hole, oil and gas mixture is passed through this channel is fed to the cutting area, this method with less consumption of the cutting fluid, the tool structure is more complicated. Now, with the tool manufacturing technology, domestic and foreign companies have introduced a variety of tools with internal coolant supply high pressure fluid (oil) passage hole new tool for internal cooling method used to create the conditions.
Now research suggests that colde saw blade  cutting fluid used almost dry cutting "Steam bundle" spray cooling method is most effective, and cutting fluid consumption, low processing costs. "Steam beam" spray cooling is a certain pressure (0.3 ~ 1MPa) the cutting fluid air atomized and sprayed at high speed cutting zone, so that temperatures were in the region of the cutting droplets quickly swirl vaporized. Vaporization of the liquid will absorb the heat, which can greatly cut down the temperature region, while also taking the cutting zone cutting fluid and space heat and powder, improve the working environment. Practice has proved that the same amount of cutting fluid in the case of "steam beam" spray cooling at the same time by the casting method of the heat is absorbed in 1000. Therefore, it is not only to improve tool life, but also enable the cutting fluid consumption is greatly reduced. "Steam bundle" spray cooling both for automatic production line, but also for the general metal cutting.
(4) processing the cutting tool can not be directly observed, particularly in the processing of the pores and deep. Therefore, automatic monitoring and control is more important than the other processing methods.
(5) accuracy of hole size, geometry, precision, accuracy and surface roughness mutual position often due to the special nature of hole machining is difficult to control, but once the trial is successful, rather than other processing methods can be more regularly maintained.