Tungsten Carbide Seal Ring Polishing Machine Main Technical Parameters
1. Grinding / polishing disc size (mm): φ640mm × φ235mm × 30mm
2. Cruise parameters:
Imperial: teeth Z = 108 DP = 12 α = 20 °
Metric: Number of teeth Z = 114 M = 2 α = 20 °
3. Cruise Quantity: 5
4. Minimum grinding / polishing Thickness: 0.15mm
5. Maximum grinding / polishing Thickness: 40mm
6. ideal for grinding / polishing Diameter: φ75/20 tablets
7. Maximum diameter polishing: φ150 mm
8. Under the grinding / polishing speed: 0 ~ 56rpm
Tungsten carbide seal ring technology requirements for the following four areas:
1. blank carbide grade used and the physical and mechanical properties and meet the relevant standards of gold corresponding provisions of the standard;
2. Out rough edges off angle depth of not more than 0.33mm;
3. There shall be no rough surface peeling, bubbling, delamination, cracking, porosity, burnt, burnt due to defects;
4. Rough section organization should be uniform, not a black heart, bubbles, delamination, cracking, severe carburizing, decarbonization and not good pressure and other defects.
Tungsten carbide seal ring with high hardness, wear resistance, strength and toughness, heat resistance, corrosion resistance and a series of excellent performance, especially its high hardness and wear resistance, even at a temperature of 500 ℃ also remained unchanged at 1000 ℃ still very high hardness. Carbide is widely used as a tool material, such as turning, milling, planer, drill, boring knife, for cutting cast iron, nonferrous metals, plastics, chemical fiber, graphite, glass, stone and ordinary steel can also be used to cut difficult to machine materials resistant steel, stainless steel, high manganese steel, tool steel. New carbide cutting tools carbon steel equal number of times.
Tungsten carbide seal ring erosion most common way is tantamount to the above three categories:
1. Back Flushing
Is back flushing chamber is sealed to the media carbide seal ring leads to the pump outlet end, carbide seal ring flush sealed cavity older media from time to time, to avoid the media particles, impurities, heavy lake, the conflict are Chi Gong damage.
2. Wash Itself
It refers to non-media or from the pump inlet to introduce under the pressure side, rinse conflict between being first access into the pump chamber. The most simple way to flush itself, but only compared to the situation with the media being noisy.
3. External Flush
Is another set of fluid system, the temperature is below the sealing medium into the sealed chamber for flushing only require flushing fluid into the selected medium does not affect product quality.
Tungsten carbide seal rings to answer not only the rare few, but the low quality of the end. Portable grinding machine seat seal inside. To ensure the recovery carbide seal ring on the square being cemented carbide has state. In lathe with a four-card retainer to the valve port and off-axis hole core, while the end of the reamer. Car made two rings (1Gr18Ni9Ti) set in reaming outside. Ensuring that it is no displacement of the central state, the ability to crank with precision and reasonable and in the mating surfaces welded so they can not move, then dug welding valve head with carbide D547 molybdenum electrodes, according to the seat in front of the hole grind with repair seal in the valve head.
The high-quality tungsten carbide seal ring medium containing suspended particles, the wear on the sealing ring is very serious, which requires the production of wear-resistant material sealing ring. This sealing ring is usually produced using chrome steel, carbon tool steel, bearing steel, high chrome cast iron and other materials, the shorter its life. Tungsten carbide with high hardness and strength, good wear resistance, long life with its sealing ring made of, but the downside is brittle carbide, machining difficulties. As we all know, the process is generally the production of carbide with a good compression molding material at room temperature, and then the high-temperature firing. As the ring deformation is large, usually used to increase production to reduce the thickness of the ring deformation, not only multi-material, and post-processing required for a long time, so the price is expensive ring firing at high temperatures, which generally do not use hard alloy materials to do the sealing ring.
Tungsten carbide mechanical seal ring is a high hardness refractory metal carbides (WC, TiC) as a main component micron powder, cobalt (Co) or nickel (Ni), molybdenum (Mo) as a binder in vacuo furnace or hydrogen reduction furnace sintering powder metallurgy products. Besides carbon atom, a nitrogen atom, a boron atom can enter the gap in the metal lattice, the solid solution is formed between the charge. They are similar in nature between the filling and the carbide can conductivity, thermal conductivity, high melting point, high hardness, brittleness is also large. Carbide seal rings can also be used to make drilling tools, mining tools, drilling tools, measuring tools, wear parts, metal grinding, cylinder liners, precision bearings, nozzles.
Tungsten carbide due to the high hardness, low thermal conductivity, as well friction materials are widely used in the manufacture of various types under various conditions of the sealing ring, often used as a sealing ring hardware. However, due to the brittle carbide and high prices, in order to save costs and ensure the mechanical strength of the seal ring, often using carbide inserts mounted in place of solid carbide ring. Tungsten carbide ring seat inserts and inserts carbide rings mounted using interference connection. Interference connection to select the amount of interference is directly related to the sealing performance is good or bad, if the amount of interference is too small, it will cause the seal ring and seat relative rotation and detachment, as well as leakage of hydraulic and pneumatic seals medium; If the amount of interference too much will cause plastic deformation or fracture sealing ring.
A light gradient carbide seal ring and a manufacturing method is characterized by the seal ring by the working and non-working parts composed of parts; 90-94% by weight of the working portion of the tungsten carbide, 6-10% by weight of nickel or cobalt composition, thickness of 1.0-2.5mm; inoperative portion of 40-60% by weight of titanium carbide powder, 10 to 18% by weight of nickel powder, 22-50% by weight of tungsten carbide powder composition; pressed, the first weighing work area with a carbide materials, including adding steel in the flat, and then weighing the non-working parts with lightweight alloy material, including adding steel in flat, pressure pressing, sintering and then placed in a furnace, get two different components of the gradient cemented carbide seal ring.
In addition to the welding industry think, grinding process, quality is the most important part of the tungsten carbide saw the quality of the pros and cons. Recommended lug, wire high-frequency welding, depending on the processing conditions recommended by the appropriate grades: for hard wood, recycled wood and special JX5 grade aluminum; apply to plywood, MDF and laminated board dedicated JX35 grades; applicable dedicated JX40 grades of steel; addition to ordinary wood cutting with a YG8, YG6 other brands. Otherwise JX9, dedicated professional with nails and rock cutting. JX9: Density 14.5 g / cm ³ ~ 15.0g/cm ³, hardness greater than or equal 90.5HRA, flexural strength greater than or equal to 2,000, we recommend using a high-frequency welding.
Tungsten carbide saw inspection rules and test methods shall meet the requirements of GB 5242.
Signs, packaging, transportation and storage: tungsten carbide saw per 1Kg with plastic bottles, cardboard box in a dry, plugged with paper or cotton, placed in the carton boxes, plastic or boxed good , placed in cardboard boxes. Carton weight of not more than 30Kg.
Each box should be pasted on the factory label stating the product brands, models, lot number and net weight. When product transportation should prevent moisture not violent collision. Products should be stored in a dry, acid, alkali atmosphere of the place, to prevent corrosion. Product storage period should not exceed one year, one year after the product discoloration should be reprocessed before use.
Tungsten carbide saw blade has excellent properties of high hardness, wear resistance, high temperature, etc., are widely used in industry, hacksaw, high hardness can be used for cutting all kinds of cast iron, stone and steel, difficult to machine materials. The specifications of many consistent serrated carbide steel sheet welded to the dense body of the saw, can significantly increase the service life of the cutting speed and the saw.
1. for hard wood, recycled wood and aluminum special carbide cutting blade.
2. suitable for plywood, MDF and laminated board dedicated carbide cutting blade.
3. for a special carbide steel cutting saws.
Serrated blade with carbide wear tests conducted, MDF cutting object by measuring the wear of the tip of the microscope, were measured to analyze the main parameters of the law of wear with blunt cut length variation results show, negative clearance C, C1, shortening edge a a, the flank wear width E1, front flank wear MY, Ma flank wear parameters are increased with increasing length of the cutting, the flank wear of the sawtooth the former is much larger than flank wear; addition, blunt head wear obviously experienced in the early stages of wear and normal wear stage. Carbide circular saw blades significant advantages, widely used.
1, the frequency of 100KHZ-1.1MHZ, can effectively control the hardening depth, small pieces of the heating filaments Parts particularly suitable;
2, using IGBT power devices, the device operating frequency up to 500KHZ, advanced control technology, original;
3,100% duty cycle, maximum power, 24-hour operation;
4, with a constant current / constant power control function, higher heating efficiency;
5, the output power, frequency, current full display;
6, the installation is simple, just take electricity and water can be used, without someone to install;
7, small, space-saving installation and easy maintenance;
8, can be adjusted automatically controlled heating, power and time insulation process, help to improve the quality of the repetitive heating and simplify workers to operate;
Serrated carbide saw blade angle is in the cutting position. Serrated cutting angle affects the performance results. Greatest impact is on the cutting rake angle γ, the angle α, wedge angle β. Rake angle γ is serrated cutting edge angle, the greater the cutting rake angle more brisk, rake angle generally between 10-15 ℃. After the angle is the angle between the machined surface of the sawtooth between its role is to prevent the serrations machined friction surface, the smaller the angle the greater the friction, the more smooth the processing products. After the general value of carbide saw blade angle 15 ℃. Wedge angle is derived from the anterior horn and posterior horn out. But the wedge angle is not too small, it plays a role in keeping the teeth, according to strength, heat resistance, durability degrees. Rake angle γ, the angle α, the wedge angle β three equals 90 ℃.
Tooth carbide metal cutting circular saw blades workpieces, in particular to a machine serrated clip-carbide blanks. Includes a body, a fixed intermediate position of the blank with a counterbore hole, the bottom surface of the gear housing is provided with positioning projections with recesses, through the body of the fixing holes and fastening screws, and the positioning projection Tower block in vitro with teeth on the circumference of the disc-shaped connecting piece blade fixed; said body top with radial clearance angle for machining and tangential clearance angle of the body aside.
TA Carbide rough serrated further characterized by said positioning projection may be shaped retaining projection platform, or arc-shaped positioning projections or triangular positioning block; step, the radial relief angle machining and tangential clearance angle of the body is in the range reserved for the top body, 1/2-1/3 total length, a width of 1-3 mm in the direction of the widening part; further, the body is provided with a top after working angle to the flank of the sawtooth reserved body; further, the rear corner at the top of the blank body aside, over a length of 4-6 mm from the edge of the thickened portion of 0.5-1 meters halo.
Machine clip-carbide blanks serrated utility model welding process aimed at resolving existing welded serrated blade with existing multi-piece body annealing effect, reducing its strength and hardness, repeated welding will affect their performance, with the repair needed dedicated high-frequency welding, if interrupted several serrated blade during use, the entire blade will be scrapped, and increase their cost; conventional blade blanks generally approximate rectangular shape, radial clearance angle and cut in the clearance angle of the grinding process, the path length of the grinding wheel consumes large long processing time, greatly reducing the efficiency of the grinding blade problem and provide an easy replacement processing cost savings serrated blade machine clip-serrated carbide blanks.
Machine clip-carbide blanks refers to existing carbide teeth serrated saw blade on the blade body mostly serrated blade welded carbide blanks, then after grinding molding. The disadvantage of this blade is: multi-piece body having a welding process annealing effect, reducing its strength and hardness, repeated itself will affect the performance of the welding, with a special need for the repair of high-frequency welding, if the blade during use interrupted several serrated blade will scrap the whole, increasing its cost; conventional blade blanks generally approximate rectangular shape, the radial clearance angle and tangential clearance angle of the grinding process, the grinding path length, wheel consumption, long processing time, greatly reducing the efficiency of the grinding blade.
The gel is applied to the centrifugal molding process YG10 composite powder molding body, the effects of the solid content of the slurry rheology YG10 of the composite powder, the gel analysis of the centrifugal molding process, the amount of initiator and the impact pressure of the polymerization rate, and the influence of the centrifugal speed on the sintered body and performance. The results showed that: oleic acid as a dispersant to prepare stable and good mobility optimum slurry solids content of 50% (volume fraction), triggering agent is added in an amount 5mmol / L (relative to the volume mix), the condensate plastic forming process centrifugal slurry pressure to accelerate the curing, self-designed centrifugal molding machine.
When cutting carbide cutting tools, according to the relative movement of the workpiece and the tool the role of different cutting movement divided into the main movement and feed movement. Refers to the surface to be processed surface of the workpiece is about to be resected; transition surface is a surface of the workpiece by the cutting edge being formed; refers to the surface of the machined surface formed by cutting the workpiece. Cutting the main movement is the most important, the power consumption of most sports, it is the relative movement between the tool and the workpiece students. Car, boring main movement is rotational motion machine spindle. Additional feed motion is generated between the movement of the tool and the workpiece, to maintain a cutting continuously. Carbide cutting tool Carbide cutting tool when cutting through the workpiece material layer by a one-way piece resection.
Carbide tool is the structure within the high-pressure cooling innovation, innovation is the improvement of the structure of the original material innovative cooling techniques typically use high-pressure high-temperature alloys like titanium machining, machining superalloys have a very excellent performance. There flute theory of applications, such as Hot Wheels cutter, in fact, is to use the theory of flute. Functional application of innovative products is the original technology to the new technology, or the technology to integrate existing technologies. For example, double-sided blade shallow hole drilling, was just turning on the technology, and applications in recent years cutter.
Tungsten Carbide Seal Ring Polishing Machine Main Technical Parameters
