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add to favorites History of diamond sawing Pc  
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Diamond saw blades are one of the diamond products and are the most widely used diamond products in the world. Despite the record of diamond saw blades for sawing stone in 1854, the truly effective diamond circular saw blade was designed by Frenchman Jacquinin 30 years later and was used for the actual cutting of stone for the first time in 14 years.7'' cut off disc for metal The abrasives used at the time were all natural diamonds (diamonds). Initially, large particles of natural diamond were inlaid into the cast steel insert by hand, and the insert was attached to the saw blade substrate for cutting. But the effect is not satisfactory. In the late 1930s, the diamond block powder metallurgy manufacturing technology that mixed metal powder with diamond and sintered was developed, and the design and manufacturing technology of the diamond saw blade has made great progress.

 Since the first synthetic diamond was successfully synthesized, the diamond saw blade design and manufacturing technology has been continuously improved. At the end of the last century, China's diamond saw blade design and manufacturing technology, along with the rise of stone processing industry, architectural decoration industry and road and bridge construction, has also achieved extraordinary development, especially since 1993, due to rising raw material prices, market competition has intensified. In order to reduce costs and improve product quality, diamond saw blade manufacturers have increased investment in scientific research, and various new theories and new technologies have emerged. The design and manufacture of diamond saw blades mainly include sawtooth bond design, sawtooth shape or structural design, and saw blade manufacturing technology. Looking back on the development of diamond saw blades, 7'' cut off disc for metal the design and manufacturing technology of diamond saw blades has obtained a lot of research results.

add to favorites The steps that the grinding wheel needs to know to sharpen the crescent Pc  
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thin flat cutting disc
The steps for grinding the crescent in the grinding wheel are as follows:
1 Hand-held drill bit makes the main cutting edge basically horizontal to ensure the right edge angle is appropriate. The outer edge of the outer straight edge is not allowed to be tilted.
2 When starting to sharpen, the drill bit should be fed slowly and smoothly forward and horizontally, and the back should be ground to form a circular arc. The radius of the arc and the length of the outer edge should be guaranteed. If the fillet radius of the grinding wheel is less than the value of the radius of the arc, the drill should also be slightly swung in the horizontal plane to obtain the desired radius of the arc.
3 The drill bit must not swing up and down in the vertical plane, or the sintering shaft rotates, otherwise the chisel edge becomes S-shaped, the chisel angle of the chisel edge becomes smaller, and the arc shape is also difficult to control symmetry.
4 When turning the drill bit 180° on the other side of the sharpening, special attention should be paid to maintaining the symmetry of the arc and the tip of the drill.
add to favorites Grinding wheel grinding process overview Pc  
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The grinding wheel is a grinding cutting tool that consists of a number of small, hard abrasive particles and a bonding agent. The abrasive particles are directly responsible for the cutting work and must be sharp and have high hardness, heat resistance and certain toughness. Commonly used abrasives are alumina (also known as corundum) and silicon carbide.China supply 7" cut off disc Alumina abrasives have high hardness and good toughness and are suitable for grinding steel. Silicon carbide abrasives are harder, sharper, and have better thermal conductivity, but are brittle and suitable for grinding cast iron and hard alloys.

Due to the different thickness of the grinding wheel, the surface roughness and processing efficiency of the workpiece after processing are different. The coarse abrasive grains are used for rough grinding, the fine abrasive grains are suitable for fine grinding, the coarser the abrasive is, the smaller the grain size is.

The binder acts to bond the abrasive. Ceramic binders are commonly used, followed by resin binders. Different binder materials affect the corrosion resistance, strength, heat resistance and toughness of the grinding wheel.

The harder the abrasive grain bond is, the less likely it is to fall off the grinding wheel. The hardness of the grinding wheel, that is, the hardness of the grinding wheel, refers to the difficulty of the abrasive grains on the surface of the grinding wheel falling off under the action of external force. Easy to fall off is called soft, otherwise it is called hard. The hardness of the grinding wheel and the hardness of the abrasive are two different concepts. The surface of the workpiece to be ground is soft, and the edge (edge) of the abrasive grain is not easy to wear, China supply 7" cut off discso that the abrasive grain can be used for a longer period of time, that is, the grinding wheel (harder wheel with higher hardness) can be firmly bonded. Conversely, a grinding wheel with a low hardness is suitable for grinding workpieces with high hardness.

The grinding wheel works under high speed conditions. In order to ensure safety, it should be inspected before installation, and there should be no defects such as cracks. In order to make the grinding wheel work smoothly, the dynamic balance test should be carried out before use.

After the grinding wheel has been working for a certain period of time, the surface gap will be blocked by the grinding debris, the sharp angle of the abrasive will be blunt, and the original geometry will be distorted. It must therefore be trimmed to restore cutting power and the correct geometry. The grinding wheel needs to be trimmed with a diamond pen.

Grinding is a method of cutting a workpiece with a grinding wheel as a cutting tool on a grinding machine. The characteristics of this method are:

(1) Since the grinding wheel itself has high hardness and heat resistance, the grinding can process materials with high hardness, such as hardened steel and hard alloy.
(2) The characteristics of the grinding wheel and the grinding machine determine that the grinding process system can make uniform micro-cutting, generally ap=0.001~0.005mm; the grinding speed is very high, generally up to v=30~50m/s;
the grinding machine has good rigidity; Hydraulic drive, so grinding can economically achieve high machining accuracy (IT6~IT5) and small surface roughness (Ra=0.8~0.2μm). Grinding is one of the main methods of finishing parts.
(3) The temperature in the grinding zone is high due to severe friction. This can cause stress and deformation of the workpiece and even burn the surface of the workpiece. Therefore, a large amount of coolant must be injected during grinding to reduce the grinding temperature. The coolant can also act as chipping and lubrication.
(4) The radial force during grinding is large. This causes the machine-grinding-workpiece system to retreat so that the actual depth of cut is less than the nominal depth of cut. Therefore, when the grinding is about to be completed, the knife should not be used for light grinding to eliminate the error.
(5) After the abrasive grain is blunt, the grinding force also increases, causing the abrasive grain to break or fall off, and the sharp edge is re-exposed. This characteristic is called "self-sharpness". Self-sharpening makes grinding at a certain time. The internal energy can be carried out normally, but after a certain working time, manual trimming should be carried out to avoid the vibration, noise and damage to the surface quality of the workpiece caused by the increase of the grinding force.

add to favorites China cuts off the disc to prevent the rupture of the cutting blank Pc  
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Reasonable arrangement of machining process

1) The size of the wire-cut workpiece blank should be determined according to the size of the part, and should not be too small. In general, the pattern should be located in the middle of the blank or at a position far from the edge of the blank and not easily deformed. Usually, the pattern should be taken to the blank margin of more than 10 mm;
2) Where a large cavity or a narrow and complex punch is used, the traditional solid sheet habit is changed when preparing the blank. Large frame cavity, narrow and long cavity and other easily deformable parts, the middle part should be hollowed out. In this way, the condition in the surface is improved when quenching, the temperature difference is small, the generated stress is small, and the volume to be cut at the time of cutting is small, and the stress is balanced and not damaged;
3) In the case where the mold is allowed to use, China cut off disc the corner of the large frame-shaped cavity part should be appropriately increased, or the blanking point should be drilled before the line cutting to alleviate the phenomenon of stress concentration;
4) For the punched part, before the quenching, the threading hole of the starting point of the shape should be drilled in the bump blank, so that the workpiece maintains the internal stress balance and is not damaged during cutting, so as to avoid cracking deformation from the outside of the material.

Optimize the process plan of wire cutting and select reasonable process parameters

1) The traditional habit of changing the cutting position in one place is the coarse and fine secondary cutting, so that the deformation amount after the first rough cutting is corrected in time in the fine cutting. Generally,China cut off disc the cutting amount during fine cutting should be determined according to the amount of deformation after the first cutting, and generally takes about 0.5 mm. This method is often applied to parts with complex shapes that are bound to be deformed or molds that require high precision and small clearance;
2) The habit of changing the two-point clamping is single-point clamping, so that the deformation during the cutting process can be freely stretched, and the interference of the two-point clamping on the deformation is prevented, but it should be noted that the reasonable part of the single-point clamping is usually at the end program. Where. The deformation produced in this way only affects the scrap portion and avoids the influence on the molded portion;
3) For the easily deformed cutting parts, the starting point of the cutting, the program direction and the clamping position should be arranged according to the shape characteristics of the parts to reduce the deformation amount. Generally, the starting point of the line cutting should be set in a flat, finished or incompletely affected part of the workpiece.
add to favorites Storage and use of grinding wheels Pc  
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  1. The actual line speed of the fast grinding wheel for stainless steel shall not exceed the requirements of the following table.   2. Before the installation of the fast grinding wheel for stainless steel, check the speed mark of the grinding wheel, check whether there are cracks and damages, and check the strength.   3. After the installation of the grinding wheel, it must be idling for not less than 5 minutes with the protective cover. Only when it is sure that the fast grinding wheel for stainless steel has reliable strength can it start working.   4. It is forbidden to use a coolant that has a destructive effect on the grinding wheel binder.   5. When handling the fast grinding wheel for stainless steel, it is necessary to prevent severe vibration and impact.   6, according to the size and shape of the grinding wheel, should be placed on the shelf and in the box.   7. The fast grinding wheel for stainless steel should be stored to prevent moisture and freezing.   8. The storage period of the resin bond grinding wheel shall not exceed one year. If it is overdue, it must be strictly checked to confirm that the quality is no problem before it can be used.
add to favorites Storage and use of grinding wheels Pc  
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  1. The actual line speed of the fast grinding wheel for stainless steel shall not exceed the requirements of the following table.   2. Before the installation of the fast grinding wheel for stainless steel, check the speed mark of the grinding wheel, check whether there are cracks and damages, and check the strength.   3. After the installation of the grinding wheel, it must be idling for not less than 5 minutes with the protective cover. Only when it is sure that the fast grinding wheel for stainless steel has reliable strength can it start working.   4. It is forbidden to use a coolant that has a destructive effect on the grinding wheel binder.   5. When handling the fast grinding wheel for stainless steel, it is necessary to prevent severe vibration and impact.   6, according to the size and shape of the grinding wheel, should be placed on the shelf and in the box.   7. The fast grinding wheel for stainless steel should be stored to prevent moisture and freezing.   8. The storage period of the resin bond grinding wheel shall not exceed one year. If it is overdue, it must be strictly checked to confirm that the quality is no problem before it can be used.
add to favorites The 12th Shanghai International Metal Cutting and Welding Technology Exhibition Pc  
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The industry giants are all present, competing and demonstrating on the same stage.
   Shanghai International Metal Cutting, Welding and Forming Technology Exhibition was founded in 2004 and has been successfully held for 11 sessions. It is the largest and influential event in the high performance cutting disc、 field of cutting, welding and forming of metal materials in China. The exhibits cover metal sheets and welded pipes. In the field of seamless pipes, profiles, bar products and cutting, welding and forming equipment, the last exhibition was held on November 22, 2017 at the Shanghai New International Expo Center. Nearly 400 outstanding enterprises in metal materials and processing equipment participated. The exhibition has a scale of 30,000 square meters. It attracted 28,321 professional visitors from 37 countries and regions to visit.
◆Several highlights cast the top event
In the same period, we will achieve a perfect industrial chain: Shanghai International Metal Cutting, Welding and Forming Technology Exhibition will be held again at Shanghai New International Expo Center on November 1-3, 2018. Concurrently held:
Shanghai International Metal Sheet and Processing Equipment Exhibition, Sheet Metal Automation and Advanced Equipment Exhibition, Shanghai International Steel Structure Exhibition,
Through the display of top metal sheets, pipes, profiles, bar products and manufacturing equipment, cutting and welding and processing equipment at home and abroad, we will achieve the 2018 Asia's largest metal products and processing technology event, covering new materials manufacturing and equipment enterprises and end users. . Visitors will radiate more than 40 countries and regions.
The organization has a strong lineup and is in line with the international market: 6 foreign industry organizations, 8 national embassies in China and 12 overseas exhibition institutions will join us, and will usher in Germany, Italy, India, Australia, the United States, East Asia, the Middle East and ASEAN. Pavilion and audience purchasing groups.
 Exhibition scope:
Metal welding, standard cut off wheel for metal and accessories:
◆ All kinds of arc welding, resistance welding, high energy beam welding equipment; welding rod, welding wire, flux, etc.
◆ Flame cutting, plasma cutting machine, laser cutting machine, CNC cutting machine; water cutting, gasoline cutting, oxyhydrogen flame cutting, saw cutting equipment, etc.
◆ Welding robots, spot welding robots, cutting robots, handling robots, palletizing robots, multi-degree-of-freedom robots, assembly robots, Cartesian robots, multi-degree-of-freedom robots, parallel robots, robotic arms and robot systems and solutions.
◆ Welding inspection, gas, software; protective masks, glasses, protective clothing, protective shoes, etc.
Sheet, pipe, profile, bar cutting, welding and processing:,
◆ CNC metal band saw, intelligent metal circular sawing machine, vertical band sawing machine, gantry sawing machine, various metal plates, tubes, profiles, bar cutting band sawing machines, circular sawing equipment; carbide saw blades, diamond saw blades, Metal circular saw blades, saw belts, saw blades, machine saw blades, bi-metal band saw blades, etc.;,
◆ Plate slitting slitting, CNC punching machine, high-speed precision punching machine, turret punching machine; all kinds of plate laser cutting machine; plasma cutting, CNC bending machine, shearing machine, sheet metal processing center, thin plate forming compound machine tool, thin plate stretching Machine, roll forming, joining; thick plate forming;
◆ Steel pipe welding and cutting equipment, pipe laser cutting machine; bending pipe and pipe fitting processing equipment;
◆ All kinds of presses, forging, bending, folding, straightening, shearing, stamping, slotting and other metal processing machines.
◆ Machine tool accessories, CNC systems, servo drives, machine tools, digital display devices, tools, tools, etc. Metalworking fluids, rust-proof materials, surface treatments, burrs, polishing equipment, etc.
add to favorites affordable jewelry Must–Have Goods Pc  
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add to favorites Bracelet Charms Extraordinary Advantages Pc  
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add to favorites rings range throughout 2018 Pc  
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add to favorites Nike Trainers vintage combination Pc  
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add to favorites Nike innovative collaboration Pc  
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add to favorites Nike common silhouette Pc  
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add to favorites Nike Air Max shoes limited-edition Pc  
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add to favorites Hand-held cutting blade application problem Pc $
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Hand-held cutting blades are used in a wide range of applications. In addition to production and processing, there are many companies that use electrician temporary work. Do you think it is safe to use a resin EN12413 cutting discs that is very common and simple to operate? In fact, the hand-held cutting piece looks ordinary. Once the cutting piece is broken, the power of attack is not small! Accident case On the morning of January 17, 2017, Wang went to the construction site as usual. He came to work and picked up his familiar hand-held cutting piece to start work. Unexpectedly, the accident happened. The grinding wheel that is spinning at a rapid speed suddenly breaks, and the lobes carry a huge inertia. They fly to Wang with lightning speed. The lobes of the cutting piece directly penetrate the eyes of Wang and are embedded in his brain. He smashed his face into two halves and eventually died. Hand-held cutting blades have the following major risk hazards 1. Object blows (cutting pieces break and blow out to hurt people) 2. Electric shock (the power cord is damaged and the metal part is leaking) 3. Mechanical damage (cutting of the cutting piece in operation) 4. Fire, explosion (sparks generated by cutting or grinding ignite flammable materials and hazardous chemicals causing fire or even explosion) Handheld cutting sheet considerations 1 must use a cutting piece with a protective cover; 2 Class II hand-held power tools should be used. Class II power tools use double insulation or reinforced insulation to prevent electric shock. The nameplate has a “back” type mark; 3 Check whether the cutting piece is in good condition before use; the grinding wheel that is damp, deformed, cracked, broken, edged or touched with oil or alkali should not be used. Moist cut pieces should not be used by themselves. The grinding wheel and the padding pad should be installed securely and the nut should not be too tight. 4 When operating, the operator must wear protective glasses and helmets correctly. When using the angle grinder, hold the hands with both hands. It is strictly forbidden to wear the workpiece. 5 During operation, personnel should not stand in front of the cutting piece and should stand on the side; if the working time is too long and the temperature rises, it should be stopped and then cooled naturally before operation. 6 When using the flat abrasive cutting disc, remember that the force is too strong. The blade should be held steady and then pressed by the switch. Slowly contact the sanding surface and apply force. It is forbidden to suddenly touch the rotating grinding wheel to the grinding surface, or to press the grinding head to grind it hard. It is not allowed to press the grinding head on the grinding surface and then press the switch to avoid collapse of the grinding wheel and to injure people.
add to favorites Main factors of deformation and cracking caused by wire cutting Pc  
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1.related to the structure of the part The concave and convex dies of the narrow and long shape are easy to be deformed, and the magnitude of the deformation is related to the complexity of the shape, the aspect ratio, and the width ratio of the cavity to the frame. standard cut off wheel for metal.The more complicated the shape, the larger the aspect ratio and the ratio of the cavity to the frame width, and the larger the deformation amount of the mold. The law of deformation is the middle of the cavity, the punch is usually warped, and the quenching cavity with complex shape and clear angle is prone to cracks at the sharp corners, and even prone to bursting. The frequency of occurrence is related to the composition of the material, the heat treatment process, etc.; the cylindrical wall thickness is easier to deform if it is cut on the inner wall, generally changing from a circular shape to an elliptical shape. If it is cut into the gap, it will easily burst when it is cut through; the deep slot cut from the outside of the part is easy to deform, the law of deformation is the mouth adduction, the magnitude of the deformation and the depth of the notch and the material properties. related.
2 related to the hot processing process When the die blank is forged, the forging temperature is too high or too low, and the final forging temperature is low; the final forging temperature is too high, the grain grows, the cooling rate is too slow after the final forging, and the die blank with the precipitate of the net carbide is precipitated. The forging blank annealing is not carried out according to the spheroidizing annealing process, and the spheroidized pearlite exceeds 5 grades; the quenching heating temperature is too high, the austenite grains are coarse, the material toughness is lowered, and the brittleness is increased; the quenched workpiece is not tempered in time. Parts that are not tempered.,
3 related to the machining process The larger concave die has a large area in the middle and has not been hollowed out beforehand. Due to the large volume in the frame, the frame size will produce a certain deformation; Where there is no shape starting point in the blank, the hole has to be cut from the outside of the blank, no matter how the tempering and shape of the punch is, it is generally prone to deformation, especially the quenching part is severely deformed, even in the cutting; For the ground parts after heat treatment, there are no grinding wheel particle size, feed amount, cooling method and other process requirements. After grinding, there are parts such as burns and micro cracks.
4. Related to the wire cutting process The wire cutting path is improperly selected, and it is easy to produce deformation. The clamping method of the workpiece is unreliable, and the selection of the pinch point is improper, and the deformation is easy to occur; the electric gauge is improperly selected and cracks are easily generated
add to favorites Effect of grinding conditions Pc  
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1 grinding wheel speed The increase in the linear speed of the grinding wheel reduces the maximum depth of cut of the abrasive particles, reduces the cross-sectional area of ​​the chips, and increases the number of cuttings and the heat of grinding. These two factors increase the amount of infarction, but when the linear velocity of the grinding wheel reaches a certain level (for example, up to 50 m / s), the amount of infarction of the grinding wheel is greatly reduced.cut off disc for stainless steel
2 workpiece speed The effect of workpiece speed on wheel infarction levels is closely related to other elements in the cutting conditions. The line speed of the workpiece is doubled and the infarct volume of the wheel is increased by a factor of three. This is because the higher the workpiece speed, the shallower the penetration depth of the abrasive grains, and the smaller the cross-sectional area of ​​the chips, which corresponds to the hardening of the characteristics of the grinding wheel, and thus it is easy to cause wheel infarction.
3 grinding method In fact, cut-in grinding is more severe than longitudinal grinding of the infarct. During the cutting and grinding process, the contact area between the grinding wheel and the workpiece is large, and the abrasive cutting edge rubs on the same wear scar several times. The slurry enters the grinding zone, and the heat is high during the grinding process, which easily forms infarction. The longitudinal grinding contact with the workpiece data is the side edge of the grinding wheel. When the wear surface is increased to a certain level, the abrasive particles are broken and broken under the action of the grinding force, and self-sharpening is completed. Most abrasive particles work in a sharp state, making the grinding force and grinding heat relatively low. At the same time, a substantial portion of the grinding force and the heat affected zone of the grinding can exit the workpiece in the direction of longitudinal grinding, thereby reducing the likelihood of chemical bonding.
4 grinding temperature cut off disc for stainless steelsupplier show that Any factors that increase the heat of grinding and increase the grinding temperature during grinding can exacerbate the infarction of the wheel. The infarction method is mainly bone cement infarction, and of course, diffusion infarction.
5 grinding wheel dressing speed The dressing speed of the grinding wheel has a significant effect on the infarction. When the dressing speed of the grinding wheel is low, the working surface of the grinding wheel is flat, and the number of effective grinding per unit area is increased, so that the cross-sectional area of ​​the cutting chips becomes small and the number of cuttings is increased, and infarction is easily generated. When the dressing speed of the grinding wheel is high, the working surface of the grinding wheel becomes thicker, the number of effective abrasive grains is reduced, the concave portion appears on the outer surface of the grinding wheel, acts as a hole, the chip is easily washed away, and the sintered material is easily dropped.
6. Grinding fluid Different grinding fluids have a great influence on the grinding effect. At present, ordinary emulsions contain a large amount of mineral oil and oily additives. After dilution, it is an oil-in-water emulsion white liquid with a small specific heat capacity and thermal conductivity and is very intense during rubbing. Adhesive wear and diffusion wear are easily formed between the grinding wheel and the workpiece, so that the grinding wheel is subjected to impact, the grinding force is increased, and finally the premature crushing and falling of the abrasive grains are caused, so that the grinding ratio is lowered.
add to favorites CNC tool grinding machine cutting sheet trimming method Pc $
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The use of CNC tool grinding disc low price disc for metal directly affects the normal use of CNC tools. A small part can sometimes cause the whole project to fail. Therefore, we will introduce the automatic trimming and compensation method of CNC tool grinding machine diamond cutting piece today. . The development of automatic CNC grinding technology has put forward high requirements for its supporting equipment. As one of the supporting technologies, the online automatic cutting blade trimming technology must meet the needs of modern CNC grinding technology, and it is developing in the direction of high precision, ultra-stable and fully automatic control. As a highly efficient grinding tool, 6 inch es cutting disc are widely used in the processing of hard materials such as cemented carbide, ceramics and CBN. The dressing and automatic compensation method of the diamond cutting piece determines the performance of the fully automatic CNC grinding machine, which largely determines the performance and service life of the cutting piece. Diamond cutting chip dressing principle The diamond cutting piece dressing method is an important factor affecting the grinding performance of the cutting piece. The reasonable selection of the dressing method will directly affect the surface quality and grinding precision of the workpiece. Currently used diamond cutting blade dressing methods include: online electrolytic dressing, EDM cutting, cup cutting, electrolytic-mechanical compounding and laser trimming. Since the cup-shaped cutting piece dressing method is simpler and easier to implement than other dressing methods, the diamond cutting piece is automatically trimmed by the GC cup-shaped cutting piece dressing technique. The dressing of superhard abrasive cutting discs for diamond cutting sheets is usually divided into two stages: shaping and sharpening. Shaping is a micro-cutting of the cutting piece. The purpose is to remove the shape error and surface defects of the cutting piece after the initial installation, and to ensure the geometric accuracy of the cutting piece. The sharpening is due to the passivation of the cutting piece after working for a period of time. In order to make the cutting micro-blade protrude the bonding agent and have a proper height, a sufficient space for the chip is formed between the abrasive grains, and the number of effective abrasive grains per unit area is as large as possible. . Method for dressing bowl type diamond cutting piece with GC cup-shaped cutting piece The actual geometrical relationship between the GC cup-shaped cutting piece and the bowl-shaped diamond cutting piece and the movement form are shown in Fig. 1. The bowl-shaped diamond cutting piece and the GC cup-shaped cutting piece grinding belt are completely staggered and fitted, and are respectively rotated at a certain rotation speed, and the rotation speed of the dressing wheel and the cutting piece is positioned at 8:1. The dressing wheel is fixed, and the 14 inches cutting disc is trimmed and fed in the axial direction, so that the GC cup-shaped cutting piece and the bowl-shaped diamond cutting piece form mutual abrasive grinding. Through the grinding of the end faces of the two cutting pieces, the diamond cutting piece passivation abrasive grains are removed to form a chip space, and the surface of the diamond cutting piece is re-sharpened to achieve the purpose of dressing.
add to favorites What makes the cutting disc no longer hard? Pc  
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China cut off disc The cutting piece is widely used in our life due to its impact resistance, high tensile strength and bending resistance. However, the phenomenon of the film that occurs when using the cutting piece affects our normal use, and sometimes it is doubtful why the film appears.
1. The temperature difference is too large when the cutting disc is produced. Since the cutting piece should have a certain cooling time period at the end of the hardening and heat preservation to satisfy the uniform release of stress; at this time, if the temperature of the furnace is too high or the temperature difference changes too much, the cooling change of the grinding wheel will not be synchronized, so the deformation of the grinding wheel appears. It is.
2. Hardening furnace kiln eliminates hardening and humid atmosphere All hardening furnaces, whether box furnaces or tunnel kiln, must consider intake and exhaust when designing the furnace. Due to the release of a large amount of exhaust gas (mainly only ammonia gas, water vapor) during the hardening process, if these exhaust gases cannot be discharged in time, they will be re-adsorbed by the pores during the cooling process, causing the grinding wheel to be odorous and soft.
3, hardening stable low The low stability of hardening means that due to the dual influence of environment and raw materials, the hardening temperature is not provided in time when the seasons alternate or the temperature and humidity change significantly. The hardening is high, which means that the hardening curve has been adjusted, but when the stability is happy, the weather is dry, and when the weather is dry, the hardening of the hardening is not easy.
4, the hardening curve is short This mainly means that under certain conditions, the low-temperature drying time of the hardening curve is short, and the heating rate is too fast in the heating stage. ad.high performance cutting disc
add to favorites The coarse powder mill code of practice Pc  
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The world class ultrafine mill made by our company is widely applied for making quartz sand, silica sand, foundry sand, fine sand and other sand aggregate in industries of mining, construction, metallurgic, road building and water conversancy etc.

During the operation of the coarse powder mill, our experts remind users of the following matters:
  • 1.During the application of the coarse powder mill from the professional manufacturer, some personnel shall be arranged to take responsibility of management. The operators must be qualified with the required technical knowledge. Before the installation of this dolomite and limestone mill, the persons related to the operation should receive technical training and fully understand the operating principle, performance and regulations of the mill.
  • 2.In order to guarantee the coarse powder mill in a normal working state, a safety operation system of the equipment must be established. Only in this way can this grinding mill be guaranteed to have a long-term and safe operation.
  • 3.After some period of running, the coarse powder mill should receive an examination and repairing. The components vulnerable to worn out, such as grinding roller, grinding ring, relieving tool etc. should be repaired or replaced. Before and after the operation, a careful examination should be carried out for the connecting screws, bolts and nuts on the grinding rollers so as to find whether they are loose or sufficiently lubricated.
  • 4.When their application time surpassing about 500 hours, all the rolling bearings in the roller sleeves must be cleaned, and the damaged parts should be replaced. The oiling tool can be either a manual oiling pump or grease gun.