Diamond bit gets parameter of the material that cut stone to affect research to its surface temperature

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Summary: This literary grace is gotten with diamond bit of hot pressing agglomeration cut granite, marble and sandstone. Use infrared ray to measure Wen Yi online measure temperature of diamond bit surface. Experimental result shows temperature of diamond bit surface follows main shaft to rotate speed and feed rate increase and be increased, at the same time exterior temperature is followed auger cut time to increase and increase. Get temperature of the surface when cutting granite highest, get minimum of temperature of the surface when cutting sandstone. Keyword: Material of diamond bit stone is gotten cut auger cut parameter temperature to measure 1 foreword to be gotten in stone material in cutting, as a result of diamond bit and stone material the relative high speed between moves and in its osculatory interface produces all sorts of complex tribology phenomena. The attrition between diamond bit and Shi Caizhi, because stone material thermal conductivity is poor, major quantity of heat is passed in diamond knife head, make temperature of diamond bit surface elevatory, cause diamond graphitization, diamond cutting ability is reduced, bring about broach matrix to produce hot exhaustion at the same time, intensity and stiffness are reduced, the noise when processing stone material increases, oscillatory aggravate, broach life is reduced, serious when diamond knife head falls off, cause harm to handlers, also affect treatment quality and treatment efficiency at the same time. Research diamond bit is gotten cut parameter to be affected to its surface temperature, find out relation of element of influence surface temperature and rule, decide reasonable treatment parameter, be helpful for improving diamond bit service life and reduce finished cost, improve treatment quality. Knife head uses diamond of 2 experiments condition Cu radical metal is pulverous, diamond granuality is 80 eye of 60 ～ , use agglomeration to shape law suppress shapes, knife head solders to go up in high-speed steel cylinder. 37mm of φ of diamond bit diameter, tall 5. 6mm, wide 2mm, matrix diameter φ 35. 6mm, high 45mm. Treatment facilities uses XK5032C CNC Milling, axis of X of this equipment implementation, Y axis and Z axis the automatic feed of 3 direction, means of main shaft refrigeration uses water-cooling. Measure the temperature that cutting tool surface produces with infrared temperature measuring instrument, measure temperature limits to be in - between 650 ℃ of 50 ～ . Measure directly below condition of ℃ of room temperature L2. Stone material chooses marble, sandstone and granite respectively. This experiment basically studies the parameter such as speed of main shaft rotate speed, feed and stone material function is right the influence of temperature of diamond bit surface. The experiment is undertake below dry cutting condition, if the graph is shown 1 times,machine condition. Graph result of Nextpage3 of sketch map of material of stone of treatment of 1 diamond bit is analysed 3. When 1 feed speed processes stone material to the influence diamond bit of temperature, parameter of temperature of influence broach surface is very much, include physics of material of diamond function, bond function, stone among them parameter of mechanical function, treatment, cooling parameter. The influence of parameter of this experimental research treatment and stone material function to temperature of diamond bit surface. Graph 2 it is in main shaft rotate speed is Min of 300 R ／ , feed speed is Min of ／ of 10mm ／ Min, 15mm ／ Min, 20mm ／ Min, 25mm respectively, get temperature of surface of the broach when cutting marble beforehand cut time relation curve. From the graph 2 in can see, below condition of speed of 4 kinds of feed, temperature of diamond bit surface follows the addition of handling time and increase. Machining primary level, temperature increases slower, after handling time exceeds 4s, temperature increases quickly. When handling time achieves 10s, temperature of diamond bit surface is 5 times initiative. Graph speed of the 3 feed when be treatment marble and temperature relation curve. Can see from inside the graph when Min of ／ of 20mm of ～ of feed speed L0 temperature rises slower, when feed speed is Min of ／ of 20 ～ 30mm, temperature rises most apparent, the quantity of heat that machines stone material generation in this interval broach is most. In because get,cutting a course, diamond bit and stone material surface produce very big clash, bring about temperature of diamond bit surface to rise. Because the coefficient of thermal conductivity of marble is very low, and the coefficient of thermal conductivity of cutting tool is very tall, very big one part quantity of heat conducts diamond bit to go up, bring about temperature of diamond bit surface to lift. Because feed rate increases, face of the cut inside unit time is received increase, cutting tool contacts stone material frequency to increase, exterior temperature increases. Graph 2 feed speed and plan of concern of temperature of diamond bit surface 3 feed speed and temperature of diamond bit surface concern 3. Revolution of 2 main shaft pursues to the influence of temperature 4 it is feed speed for 15mm ／ Min, main shaft rotate speed is 300rpm, 400rpm, 500rpm respectively, auger temperature of surface of the diamond bit when cutting marble and auger cut time relation curve. From look on the whole, temperature lets time increase rise sharply. Additional from the graph 5 in can see temperature follows main shaft to rotate speed increases and increase. But temperature rises not apparent. When main shaft revolution achieves 500r ／ Min, highest temperature is 143 ℃ . Main shaft rotate speed increases. Grain of the diamond inside unit time and number of stone material attrition increase, osculatory time is long, bring about exterior temperature to increase from this. Graph rotate speed of 4 main shaft and Nextpage3 of relation of temperature of diamond bit surface. Function of 3 stone material pursues to the influence of exterior temperature 5 it is main shaft rotate speed is 300rpm, when feed speed is 15mm ／ Min. Machine average of temperature of surface of diamond bit of different stone material. From the graph 5 in can see auger temperature of surface of the diamond when cutting granite is the biggest, achieve L50 ℃ , and lowest of temperature of the surface when machining sandstone, for 30 ℃ ; The temperature when machining marble is 70 ℃ . Be informed through stone material function, granite density 2. 5 ～ 2. 7kg ／ Cm3, compressive strength 120 ～ 250MPa, the density of marble is 2. 5 ～ 2. Cm3 of 7 Kg ／ , compressive strength 47 ～ 120MPa, the density of sandstone is 2. 2 ～ 2. 5kg ／ Cm3, compressive strength 47 ～ 120MPa. The density of material of 3 kinds of stone agrees basically, but the compressive strength of granite is more than marble and sandstone far, it is 2 times of marble and sandstone almost. Stone material intensity increases, cutting force is increased, diamond cutting tool wears away serious, bring about temperature of diamond bit surface to lift. From the graph 5 in can see the temperature of surface of diamond cutting tool when machining granite is treatment marble 2 times, 5 times of sandstone. Can see from inside machining an experiment, when dry cutting granite, temperature of surface of diamond cutting tool rises very fast, temperature is very high at the same time, bring about diamond knife head to fall off. The heat of granite conducts coefficient 3. 49W ／ MK, and the heat of cupreous material conducts coefficient for 370. 49W ／ MK, can see major quantity of heat undertakes heating up conductive through diamond bit from this, bring about temperature of diamond bit surface from this quick heighten, damage of King Kong stone mill is serious. Graph rotate speed of 5 main shaft and plan of concern of temperature of diamond bit surface 4 conclusion use sort of 6 stone material and temperature of diamond bit surface when diamond bit processes stone material, main shaft rotate speed and auger cut the treatment parameter such as speed to be affected to temperature of cutting tool surface very big. Temperature of cutting tool surface increases along with the addition of main shaft rotate speed and feed speed. Temperature of diamond bit surface is followed auger cut time to increase and increase, at the same time with auger cut time to become direct ratio. Stone material function also is very big to influence of temperature of diamond bit surface. 2 times temperature of surface of the broach when granite is marble is cut in same condition run the drilling tool into the well, it is 5 times of sandstone. Dry auger cooling fluid should be used when cutting, prevent diamond bit to wear away serious. To agglomeration diamond should use cupreous solder or laser solders. Can make sure weld is high temperature resistant, unapt diamond knife head falls off earlier. CNC Milling CNC Machining