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Method of polishing and grinding

2023-10-12

Method of polishing grinding: Grinding is the grinding tool (hereinafter referred to as the grinding tool) surface embedded abrasive or coated abrasive and add lubricant, under certain pressure, the tool and the grinding tool contact and do relative movement, through the abrasive action, from the workpiece surface cut a layer of very thin chip, so that the workpiece has a precise size, accurate geometry and high surface roughness. Its essence is to use free abrasive particles to carry out micro-cutting including physical and chemical comprehensive effects on the surface of the workpiece through the grinding tool. Features:(1) In mechanical grinding, the machine tool-tool-workpiece system is in an elastic floating state. (2) The workpiece to be ground is not subject to any force and is therefore in a free state. (3) The speed of the grinding movement is usually below 30 m/min, which is about 1% of the grinding speed. (4) When grinding, only a very thin layer of material can be cut off, so the heat generated is less, the processing deformation is small, and the surface deterioration layer is also thin. (5) There is residual compressive stress on the grinding surface, which is beneficial to improve the fatigue strength of the workpiece surface. (6) The operation is simple and generally does not require complicated and expensive equipment. (7) Adaptability is good. (8) grinding can obtain very low surface roughness. 1. Fluid polishing Fluid polishing is to rely on high-speed flow of liquid and abrasive particles to wash the surface of the workpiece to achieve the purpose of polishing. Commonly used methods are: abrasive jet processing, liquid jet processing, fluid power grinding. Fluid power grinding is driven by hydraulic pressure, The liquid medium carrying the abrasive particles is caused to flow back and forth at high speed over the surface of the workpiece. The medium mainly uses special compounds with good flowability at lower pressure. (polymer-like substance) and mixed with abrasive, abrasive can be used silicon carbide powder. 2. Mechanical polishing Mechanical polishing is a method of polishing a smooth surface by cutting and plastic deformation of the surface of the material to remove the convex part after polishing, Generally use oilstone, wool wheel, sandpaper, etc., mainly manual operation, special parts such as the surface of the rotary body, Auxiliary tools such as turntables can be used, and the method of super-lapping can be used for high surface quality requirements. Super lapping is a special abrasive tool, In the polishing liquid containing abrasives, it is tightly pressed on the surface of the workpiece to be processed for high-speed rotating motion. Using this technology, the surface roughness of Ra0.008 μm can be achieved, which is the highest among various polishing methods. Optical lens molds often use this method. 3. Ultrasonic polishing The workpiece is placed in the abrasive suspension and placed together in the ultrasonic field, relying on the oscillation of the ultrasonic, The abrasive is ground and polished on the surface of the workpiece. Ultrasonic machining macro force is small, will not cause deformation of the workpiece, but tooling production and installation is difficult. Ultrasonic machining can be combined with chemical or electrochemical methods. On the basis of solution corrosion and electrolysis, ultrasonic vibration is applied to stir the solution, The dissolution products on the surface of the workpiece are separated, and the corrosion or electrolyte near the surface is uniform; Ultrasonic cavitation in the liquid can also inhibit the corrosion process, conducive to surface brightening. 4. Electrolytic polishing The basic principle of electrolytic polishing is the same as chemical polishing, that is, by selectively dissolving the small protruding parts of the surface of the material, Make the surface smooth. Compared with chemical polishing, the effect of cathode reaction can be eliminated, and the effect is better. The electrochemical polishing process is divided into two steps: (1) Macroscopic leveling dissolution products diffuse into the electrolyte, and the geometric roughness of the material surface decreases, Ra> 1μm. (2) micro light level anode polarization, surface brightness, Ra <1μm. 5. Fluid polishing Fluid polishing is to rely on high-speed flow of liquid and abrasive particles to wash the surface of the workpiece to achieve the purpose of polishing. Commonly used methods are: abrasive jet processing, liquid jet processing, fluid power grinding. Fluid power grinding is driven by hydraulic pressure, The liquid medium carrying the abrasive particles is caused to flow back and forth at high speed over the surface of the workpiece. The medium is mainly made of special compounds (polymer-like substances) with good flowability at lower pressure and mixed with abrasives, The abrasive may use silicon carbide powder. 6. Chemical polishing Chemical polishing is to make the surface of the material in the chemical medium micro convex part of the concave part of the preferential dissolution, A smooth surface is thus obtained. The main advantage of this method is that it does not require complex equipment and can polish workpieces with complex shapes, Many workpieces can be polished at the same time with high efficiency. The core problem of chemical polishing is the preparation of polishing solution. Surface roughness obtained by chemical polishing Generally, it is several 10 μm. 7. Magnetic grinding and polishing Magnetic grinding and polishing is the use of magnetic abrasive under the action of a magnetic field to form an abrasive brush to grind the workpiece. This method has high processing efficiency, Good quality, easy control of processing conditions, good working conditions. With suitable abrasives, the surface roughness can reach Ra0.1 μm. The polishing in plastic mold processing is very different from the surface polishing required in other industries, Strictly speaking, the polishing of the mold should be called mirror processing. It not only has the very high request to the polishing itself but also to the surface flatness, There are also high standards for smoothness and geometric accuracy. Surface polishing is generally only required to obtain a bright surface. The standard of mirror processing is divided into four levels: AO = Ra0.008μm, A1 = Ra0.016μm, A3 = Ra0.032μm, A4 = Ra0.063 μm, due to electrolytic polishing, fluid polishing and other methods are difficult to accurately control the geometric accuracy of the part, The surface quality of chemical polishing, ultrasonic polishing, magnetic grinding polishing and other methods can not meet the requirements, so the mirror processing of precision molds Or mainly mechanical polishing.

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Take you to understand the characteristics of grinding machine products

2023-10-11

Product Features: 1. Imported switch with overload protection has the function of phase loss and leakage protection. 2. Equipped with vacuum cleaner connection device to provide dust-free working environment. 3, fast speed, can work for a long time, high grinding efficiency. 4, can add 12kg of weight iron, can effectively polish the old epoxy floor. 5, can adjust the ground grinding depth. 6. There are four kinds of diamond grinding discs for selection: extra coarse, coarse, medium and fine. The extra coarse disc is especially suitable for removing the old epoxy ground. 7, you can choose the combination of cheap grinding block. 8. The damping device designed with aviation rubber material is flexible and durable.

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What does the floor grinder floor grinder inverter display oL2 mean? Why can't the machine start? How to solve?

2023-10-09

The situation is as follows: 1. The ground is very uneven, the resistance of the grinding disc is large, and the motor load is too heavy. 2. If this situation occurs when the new machine is used for the first time, it means that the governor has been adjusted to the fastest speed position, or the new grinding plate (block) Not open rough pressure on the rough hard surface, resulting in a large disc resistance, motor load is too heavy. 3. If the gearbox is repaired and the machine is initially tested like this, it may be that the gear assembly is not smooth and too tight, causing the grinding disc to rotate manually. It is not smooth, or the motor shaft and the center gear are not concentric after the motor is fixed during assembly, that is, the rotation is not concentric, which makes the electricity The rotation of the rotor is blocked and Caton occurs. Corresponding solution: 1, the machine up, move to a relatively flat ground area grinding, and then slowly cut into the uneven ground area, or use Other small grinding disc machinery will ground the rough surface of the potholes slightly smooth, and then use the machine to grind. 2. Roughen the grinding piece (block) on the cement floor. Press down on the armrest and raise the starter of the machine (make the grinding disc slightly off the ground). The machine (grinding disc) can be slowly landed. 3. Reassemble the gear or reassemble the motor to make the gear and the grinding disc rotate smoothly. After inserting the motor shaft into the central gear Concentric, suspend the motor and the box and energize the motor to start the motor, so that the motor, gear and grinding disc rotate smoothly. After shutdown, hand Rotate the grinding disc smoothly.

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Meitengqi multi-function grinding machine

2023-10-08

Meatengqi multifunctional ground grinding machine can be used for grinding concrete ground, with light and flexible operation, grinding and sucking Body, save manpower, grinding and vacuuming into one, while polishing while vacuuming, providing a good dust-free polishing environment. If equipped with sandpaper grinding, can also be polished epoxy putty layer; at the same time on the epoxy putty layer wear small, improve Epoxy floor flatness, with resin drive disc and resin grinding, can be used for liquid hardener construction Sanding and polishing. Use a rubber connector to connect the grinding disc to completely avoid the shock caused by mechanical wear after the equipment has been used for a period of time. movement phenomenon.

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MG4P-480 multi-function floor grinding machine

2023-10-07

Meitengqi brand MG4P-YY-580 multi-functional floor grinding machine, to meet the needs of professional users for large area industrial floor grinding efficiency, very cost-effective. Suitable for marble, granite, concrete floor grinding renovation, etc. Product Features: 1. The appearance design is novel and elegant. 2. Folding handle, integrated central control panel design, convenient operation, safe and reliable, ergonomic, easy to move the handle. 3, high-power (7.5HP) variable frequency motor, to meet the requirements of industrial floor grinding for a long time and frequent use. 4, automatic pressure adjustment control system, to meet the needs of different construction technology. 5. It can be equipped with dust collection equipment to realize dry and wet working modes. 6. The rotary drain switch and the central water outlet system of the grinding disc can effectively solve the secondary loss of grinding consumables and the grinding line generated during work, thus greatly improving the work efficiency. 7. The multi-functional grinding disc can be installed with various grinding consumables to reduce your construction cost as much as possible. Want to know more welcome to call Guangzhou Qing Qin Yu Environmental Protection Technology Co., Ltd., we wholeheartedly for your service! http://www.qingqinyu.com

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How to judge the floor grinding machine gear rotation is good or bad?

2023-09-27

In the floor construction, floor grinding machine is very important floor grinding equipment, after long-term use in the process of operation may encounter some faults, which gear rotation is a very important problem, how to judge the floor grinding machine gear rotation is good or bad? 1. Listen to the sound, the floor grinding machine with good processing accuracy can be comparable to the belt drive 2. Look at the selection of materials, high-quality equipment will consider the mechanical heat dissipation performance of mechanical dry grinding, so aluminum alloy material will be selected. 3. Look at the floor grinding machine rotation with the clearance accuracy, with the hand rotation grinding disc test with the clearance. 4. The durability of the floor grinding machine has a great relationship with the design of the box body. After determining the material of the box body, the weight of the mechanical grinding head is determined. If you are interested in the products of the United States, welcome to consult the hotline: 13925069066.

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