Grinding machines produce flat, cylindrical, and other surfaces through high-speed rotating abrasive wheels. Grinding is a means of giving a more accurate finish to a part already machined but is also a machining process in its own right. The main types of machine are the surface grinding machine for flat surfaces; and the cylindrical grinding machine for cylindrical surfaces. More complex shapes are produced by shaped wheels called contour grinding wheels. Bench and pedestal grinders are used for tool sharpening, etc. A grinding machine, often shortened to grinder, is one of the power tools or machine tools used for grinding, it is a type of machining using an abrasive wheel as the cutting tool. Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation. Grinding is used to finish workpieces that must show high surface quality (e.g., low surface roughness) and high accuracy of shape and dimension. As the accuracy in dimensions in grinding is of the order of 0.000025 mm, in most applications, it tends to be a finishing operation and removes comparatively little metal, about 0.25 to 0.50 mm depth. However, there are some roughing applications in which grinding removes high volumes of metal quite rapidly. Thus, grinding is a diverse field.
The grinding machine consists of a bed with a fixture to guide and hold the workpiece, and a power-driven grinding wheel spinning at the required speed. The speed is determined by the wheels diameter and manufacturers rating. The grinding head can travel across a fixed workpiece, or the workpiece can be moved while the grinding head stays in a fixed position. Fine control of the grinding head or table position is possible using a vernier calibrated hand wheel or using the features of numerical controls. Grinding machines remove material from the workpiece by abrasion, which can generate substantial amounts of heat. To cool the workpiece so that it does not overheat and go outside its tolerance, grinding machines incorporate a coolant. The coolant also benefits the machinist as the heat generated may cause burns. In high-precision grinding machines (most cylindrical and surface grinders), the final grinding stages are usually set up so that they remove about 200 nm (less than 1/10000 in) per pass - this generates so little heat that even with no coolant, the temperature rise is negligible.
Belt grinder is usually used as a machining method to process metals and other materials, with the aid of coated abrasives. Analogous to a belt sander (which itself is often used for wood but sometimes metal). Belt grinding is a versatile process suitable for all kinds of applications, including finishing, deburring, and stock removal. Bench grinder, which usually has two wheels of different grain sizes for roughing and finishing operations and is secured to a workbench or floor stand. Its uses include shaping tool bits or various tools that need to be made or repaired. Bench grinders are manually operated.
Cylindrical grinder includes both the types that use centers and the centerless types. A cylindrical grinder may have multiple grinding wheels. The workpiece is rotated and fed past the wheel(s) to form a cylinder. It is used to make precision rods, tubes, bearing races, bushings, and many other parts.
A cylindrical grinder is used for shaping the outside of a workpiece. These machines accept workpieces in a variety of shapes as long as they can be rotated through a central axis. In a cylindrical grinder, both the workpiece and grinding wheel are simultaneously rotated. Outside diameter grinders, internal diameter grinders, and centerless grinders are all types of cylindrical grinders.
A surface grinder has a head that is lowered to a workpiece, which is moved back and forth under the grinding wheel on a table that typically has a controllable permanent magnet (magnetic chuck) for use with magnetic stock (especially ferrous stock) but can have a vacuum chuck or other fixture means. The most common surface grinders have a grinding wheel rotating on a horizontal axis cutting around the circumference of the grinding wheel. Rotary surface grinders, commonly known as "Blanchard" style grinders, have a grinding head which rotates the grinding wheel on a vertical axis cutting on the end face of the grinding wheel, while a table rotates the workpiece in the opposite direction underneath. This type of machine removes large amounts of material and grinds flat surfaces with noted spiral grind marks. It can also be used to make and sharpen metal stamping die sets, flat shear blades, fixture bases, or any flat and parallel surfaces. Surface grinders can be manually operated or have CNC controls. A surface grinder consists of an abrasive wheel, a chuck (a workpiece holding device), and a rotary table. The chuck is used to hold the material in place while the wheel and object are rotated to produce a smooth finish.
Jig grinder as the name implies has a variety of uses when finishing jigs, dies, and fixtures. Its primary function is in the realm of grinding holes for drill bushings and grinding pins. It can also be used for complex surface grinding to finish work started on a mill.
Gear grinder is usually employed as the final machining process when manufacturing a high-precision gear. The primary function of these machines is to remove the remaining few thousandths of an inch of material left by other manufacturing methods (such as gashing or bobbing).
Centre grinder is usually employed as a machining process when manufacturing all kinds of high-precision shafts. The primary function of these machines is to grind the centers of a shaft very precisely. Accurate round center holes on both sides ensure a position with high repeat accuracy on the live centers.
Die grinder is a high-speed hand-held rotary tool with a small diameter grinding bit. They are typically air driven (using compressed air), but can be driven with a small electric motor directly or via a flexible shaft.
Grinding machines usually need to be equipped with specialized personnel to be responsible for maintenance and repairs. At the same time, the grinders must be regularly inspected to ensure that the machine tool is in good working condition.
Due to the fact that there are various operations performed on a grinding machine, the availability of different types has aided their achievement and effectiveness. Some special types of grinders specifically design for the effectiveness of an operation.
This is a small type of machine used in the workshops or labs to grind small workpieces. It is often used to sharpen lathe machine cutting tool and drill bits for drilling machines as well as small workpieces. As it is named, the machine is mounted on the floor or bench.
The portable grinders are not fixed at one point, it is often used in all fabrication process. it can be used at any position, giving the operator suitability of different grinding side. It is one of the most used grinding machines and it is often used for cutting tile.
The abrasive grinder is a special type of grinder but is quite similar to other types. well, an abrasive grinder is used while cutting and finishing jobs. However, it is more expensive than the floor and a portable grinder.
The swing frame type of grinding machine required a skilful and well-experienced worker due to the fact that it is complicated. It is designed for heavy workpiece and serious care must be taken while using it.
A surface grinder features different component such as the abrasive wheel, a chuck (a workpiece holding device) and a rotary table. The chuck holds the workpiece in place and the wheel and object are rotated to produce a smooth finish.
This type is used for shaping the outside of workpieces, making it suitable work jobs with a variety of shapes as long as they can rotate through a central axis. The workpiece and the grinding wheel rotates simultaneously in cylindrical grinders.
This is a type of cylindrical grinder that uses two rotary wheels to secure the workpiece in place. It does not make use of a spindle-like the centred grinder. The rotation speed of the wheels is determined by the rate of material to be removed.
This type of grinding machine makes use of a CNC machine tool with up to 5 axes and multiple grinding wheels. The device is used for sharpening and producing milling cutters like drills, step tools and endmills. It also widely used for producing tools used in woodworking and metal cutting industries.
Because grinders are everyday equipment in workplaces nationwide, many workers become complacent about their hazards. However, grinders are one of the most frequently cited machines during OSHA safety inspections. Rockford Systems, LLC, a premier provider of machine safeguarding products and services, offers this primer on grinder safety regulations to help prevent accidents and fatalities.
First off, it is important to be fully versed in the regulations that outline safe grinder installation, maintenance and operation. The workplace regulations that apply to grinders are OSHA 29 CFR SubPart O 1910.215, a machine specific (vertical) regulation with a number of requirements, which if left unchecked, are often cited by OSHA as violations. ANSI B11.9-2010 (Grinders) and ANSI B7.1 2000 (Abrasive Wheels) also apply. Carefully review these sets of regulations before operating any grinding machinery.
OSHA specifies that work-rests be kept adjusted to within 1/8-inch of the wheel to prevent the workpiece from being jammed between the wheel and the rest, resulting in potential wheel breakage. Because grinders run at such high RPM, wheels actually explode when they break, causing very serious injuries, blindness and even death. In addition, the distance between the grinding wheel and the adjustable tongue-guard also known as a spark arrestor must never exceed 1/4-inch. Because the wheel wears down during use, both these dimensions must be regularly checked and adjusted.
Grinder safety gauges can be used during the installation, maintenance, and inspection of bench/pedestal grinders to ensure work-rests and tongue-guards comply with OSHAs 1910.215 regulation and ANSI standards. To do so, wait until the wheel has completely stopped and the grinder is properly locked out before using a grinder safety gauge. Grinder coast-down time takes several minutes, which may tempt an impatient employee to use the gauge while the wheel is still rotating. This practice is very dangerous because it can cause wheel breakage.
Other advice: where grinders are concerned, personal protective equipment (PPE) usually means a full face-shield, not just safety glasses. The fact is, an employee cannot be too careful with a machine that operates at several thousand RPM. Remember to document any safety requirements set forth by OSHA as that is the best evidence that safety procedures are being followed.
OSHA requires that grinding wheels be ring tested before mounting them. This simple step prevents the inadvertent mounting of a cracked grinding wheel. Ring-Testing involves suspending the grinding wheel by its center hole, then tapping the side of the wheel with a non-metallic object. This should produce a bell tone if the wheel is intact. A thud, or a cracked-plate sound, indicates a cracked wheel. For larger grinders, grinding wheels are laid flat on a vibration-table with sand evenly spread over the wheel. If the wheel is cracked, the sand moves away from the crack.
To prevent cracking a wheel during the mounting procedure, employees must be very carefully trained in those procedures. This starts with making sure the wheel is properly matched to that particular grinder, using proper blotters and spacers, and knowing exactly how much pressure to exert with a torque-wrench, just to mention a few things.
This OSHA-compliant Wheel-Cover allows no more than a total of 90 degrees of the wheel left exposed. (65 degrees from horizontal plane to the top of wheel-cover). Never exceed these wheel-cover maximum opening dimensions. Larger wheel-cover openings create a wider pattern of flying debris should the wheel explode.
A well-recognized safety precaution on bench/pedestal grinders is to stand well off to the side of the wheel for the first full minute before using the machine. Accidents have shown that grinding wheels are most likely to shatter/explode during that first minute. OSHA Instruction Standard #STD 1-12.8 October 30, 1978 addresses the conditional and temporary removal of the Work Rest for use only with larger piece parts based on the condition that Side Guards are provided.
This single-phase unit is designed for motors that have built-in over-loads. Typical applications for these combinations include smaller crimping machines, grinders, drill presses, and all types of saws. The 115-V, 15-A disconnect switch and non-reversing magnetic motor starter are housed in a NEMA-12 enclosure. Enclosure size is It includes a self-latching red emergency-stop palm button and a green motor control start push button. It can be used on machines with 115-V and is rated up to 1/2 HP maximum. The disconnect switch has a rotary operating handle which is lockable in the off position only. This meets OSHA and ANSI standards. For machines with 230-V AC single-phase motors, a transformer is required to reduce the control circuit voltage to 115-V AC in order to comply with NFPA 79.
Double-wheel bench grinder shields provide protection for both wheels of the grinder with one continuous shield. The durable shield is made of clear, -inch-thick polycarbonate and measures 18-inch x 6-inch. A special shield bracket adds stability to the top of the shield. The single-wheel bench grinder shield is made of clear, -inch-thick polycarbonate and measures 6-inch x 6-inch. This sturdy, impact-resistant shield is designed for use when a single wheel needs safeguarding. These shields have a direct-mount base that attaches directly to the grinder table or pedestal.
PROTECTOR Series Shields can include color-changing LED lighting nested into the frame of the shield to illuminate the work area during machine operation. The LED light strip is integrated into the shield frame and each strip packs 262 Lumens of light per linear foot. For example, the PROTECTOR 28 octagonal or circular shield provides 2180 Lumens, compared to a typical clip-on work lamp that provides only 800 Lumens. Operators will appreciate the non-reflective, true-color rendering white light illuminating their work area. When the shield is moved out of the safe work position, white LEDs switch off and red LEDs switch on, thereby providing visual indication that the shield is in the open position. All LED lighting has been manufactured to exacting IEC IP65 outdoor/wet location standards to withstand coolant and lubricant splashes.
PROTECTOR Series Shields can be upgraded with a safety-rated interlock switch or switches, dependent upon application. Interlocking shields exceed OSHA CFR 1910 regulations and ANSI B11 Series standards, and are considered a best safety practice. Shield interlocks shut off or disengage power and prevent machine start-up when guard is not closed, thereby increasing operator safety and preventing bypassing. All safety interlock switches are mounted in a tamper-resistant NEMA 4 housing, comply with the IEC/EN 60947 safety standard and carry IEC IP66/67 device ratings. Additional motor starter or anti-restart devices may be required when incorporating interlocking devices into the Protector Series Shields in order to ensure safe and compliant operation.
Grinding machines, like broaching machines, operate over a range of speeds depending on the type of machine being used. These range from approximately 1250 to 2000m min1, although in high-speed grinding speeds of up to 5400m/min are achievable (Schey, 1987). The two most common grinding applications are cylindrical grinding and surface grinding. The wheel speed can be determined as follows:
Peel grinding machines offer a modern approach that achieves flexible grinding operations of a variety of diameters, grooves, thrust faces and forms using one set-up. Peel grinding is often compared with hard turning where a tool is traversed along a hardened workpiece following an appropriate form. Peel grinding operates in a similar mode removing a narrow strip of material as the grinding wheel is traversed along the programmed path. A typical operation is shown schematically in Figure 6.9. Grinding forces are minimized by using a very high-speed narrow superabrasive grinding wheel. Low grinding forces limit workpiece deflections and allow good accuracies to be achieved. Low forces also mean that components can be clamped using low clamping forces. This often allows components to be rotated by a driven centre. The use of superabrasive CBN wheels allows a number of diameters or faces to be ground with less frequent dressing in the case of vitrified CBN wheels or without dressing in the case of plated CBN wheels. Some peel grinding machines but not all have a swivel head for angle grinding. Angle grinding has an advantage for face grinding as explained in Chapter 5.
Peel grinding may be considered as one end of the HEDG spectrum of processes. Because a narrow wheel contact width is employed and rather more moderate depths of cut, power consumption is much lower than in HEDG. Grinding wheel wear is minimized and improved grinding ratios are achieved by using high-speed superabrasive wheels.
Surface grinding machines for ceramics can be divided into (1) creep-feed grinding type and (2) reciprocating (speed-stroke) grinding type. Reciprocating grinding works with relatively small depth of cut and high speeds (up to 40,000 mm/min) and requires particular specifications of the driving system such as high damping and acceleration. On the other hand, creep-feed grinding works with large depth of cut (e.g., more than 1 mm). For this purpose, it is necessary to work with a low and smooth feed velocity of less than 60 mm/min. Because of the large depth of cut, the contact length is high, the number of cutting edges is large, and thus the normal force acting between wheel and workpiece is relatively high. As a result, surface grinders for creep-feed machining must have a high static stiffness against these normal forces.
Grinding spindle drives of surface grinding machines require steplessly adjustable numbers of rotation speed up to about 10,000 min1. In dependence on the grinding wheel diameter, cutting speeds of about 400 m/s are achieved so that high speed machining conditions are reached. The spindle power of surface grinders depends on the field of application and may amount up to 80 kW.
Coolant supply of a surface grinding machine must provide high coolant flux (400 l/min) and high coolant pressure (300 kPa) to guarantee effective cooling of the workpiece and cleaning of the wheel. In combination with the small particle size of ceramic chips, high requirements also have to be met by the coolant purification system. Because oil is the common cooling liquid in ceramic machining, a completely sealed working area combined with an efficient suction of oil mist is required, in order to avoid danger of fire or explosion.
Furthermore, surface grinding machines can be sub-divided into three main types of construction: (1) the column, (2) moving column, and (3) transverse construction. An example of the column type grinder is shown in Figure 4.73. The design depicts a few characteristics for ceramic machining and provides a high-quality machined surface. By compact construction of the machine components as well as by using cast iron material for the machine bed, a high-static, dynamic, and good thermal symmetrical behavior is attained. A special device for trueing and dressing of diamond grinding wheels allows the application of the rotary trueing stones.
A surface grinder in moving column construction is shown in Figure 4.74, which is also appropriate for ceramic machining. In addition, the machine is provided with an external cylindrical grinding device. The concept is based on the specifications required for utilizing CBN and diamond grinding wheels. The moving column travels on a central bed and carries the grinding spindle and the spindle motor. These machine components made of polymeric concrete assure high rigidity and good damping.
The external feed drive device controlled by a CNC axis is developed for creep-feed grinding operations. The rotational speed is adjustable up to 25 l/min. A specific trueing device mounted on the top of the grinding wheel allows continuous dressing (CD) during grinding. Intermediate dressing with a table trueing device is also possible. Furthermore, the machine is fitted with complete measuring devices to record information on the workpiece, tool, and machine system .
Precision grinding machines, as with all production machines, are subject to wear. This means there must be a programme of planned maintenance or checking for sustained quality and output. Some machine designs are less prone to the effects of wear than others and this can be an important consideration in machine selection. In-process gauging can overcome the effects of wear to some extent but some types of wear are more serious than others. For example, wear of rolling contact bearings causes irregularity of motion and can seriously detract from the ultimate surface quality. Accuracy of spindle bearings and spindle-bearing condition are critical as little can be done to correct for poor spindle performance.
Precision grinding machines as with all production machines are subject to wear. This means there must be a program of planned maintenance or checking for sustained quality and output. Some designs of machine are less prone to the effects of wear than others, and this can be an important consideration in machine selection. In-process gauging can overcome the effects of wear to some extent, but some types of wear are more serious than others. For example, wear of rolling contact bearings causes irregularity of motion and can seriously detract from the ultimate surface quality. Accuracy of spindle bearings and spindle bearing condition are critical since little can be done to correct for poor spindle performance. Hydrostatic and aerostatic bearings are sometimes employed to avoid wear and to achieve the highest accuracy and longest service life (Rowe, 2012).
Table 10.1 lists the elements involved in grinding size and shape accuracy. The elements include the machine, the slide positioning, fixtures/work mounting arrangements, the grinding wheel and the workpiece. In addition, other tribological factors come into play for surface integrity and surface roughness. These include machine vibrations, grinding wheel grain size and structure and material characteristics such as hardness and toughness.
Currently electrochemical grinding (ECG) machines, developed by Everite Ltd are the only commercial combined hybrid machine tools that combine both grinding and ECM processes. UG 824  is an ECG surface grinder machine tool. It is able to process any conductive material that is electrochemically reactive. It can produce burr-free and stress-free parts without heat or other metallurgical damage caused by mechanical grinding, eliminating the need for secondary machining operations. Like ECM, ECG generates little or no heat that can distort delicate components.
The traveling distances of the X, Y, and Z axes of the machine are 600, 300, and 200mm, respectively. The maximum rotating speed of the work spindle is up to 4000rpm. ECG Technology can easily machine most metals with hardness >Rc 65 such as titanium, tool steel, and CoCr and also some brittle materials such as zirconium. The advantages of ECG process are burr-free production, low cutting force, free of heat stress, no heat affected zone, no work hardening, no recast layer, no metallurgical damage, and faster than EDM.
The above reviews show that vibration-assisted hybrid machines are the most established hybrid machines and have already gained wide industrial applications. Other hybrid machines such as hybrid laser and mechanical machining machines and hybrid additive and subtractive machines are in the initial stages of industrial validation.
The stiffness characteristics of a grinding machine vary with frequency. This can be shown by exciting a machine structure using well-known methods. Typical methods include the use of electromagnetic or hydraulic vibrators to excite the machine over a range of frequencies. Vibration measurement transducers are used to check amplitudes at different locations on the machine. Another technique is to use a force-instrumented hammer to excite the machine impulsively. The impulsive technique is usually less accurate and more difficult to apply than harmonic excitation.
The vibration shape at resonance can be found by positioning a vibration measurement transducer at various points on the machine and noting the amplitude at each point. Plotting the amplitudes on a diagram of the machine shape builds up a picture of the machine vibration. It is also helpful to measure the phase between the excitation force and the response. From the various amplitudes, the shape of each vibration mode can be plotted.
A machine has many resonances although some are more important than others. It is important to be aware that the excitation position and the response measurement position have a substantial effect on the resonant frequencies measured. In Figure 12.7, the excitation was applied horizontally to the grinding wheel-head, and the responses were measured at a nearby wheel-head position. In this case, the machine was free-standing on four levelling pads. A dominant sideways rocking mode resonance at 36Hz was found. There is a lesser resonance for sideways excitation caused by forward and backward rocking at 32Hz. Rocking modes such as these are found for most machines.
The rocking modes in this example had a relatively small influence on the accuracy of the process compared to the dominance of the vibration amplitudes. This is because at the frequency of vibration, the whole machine rocked almost as a solid body with only small relative vibration between the two wheel-heads. It is the relative vibration between the two heads that is critical for workpiece shape (Rowe, 1964).
The rocking modes can be eliminated by fixing the machine rigidly to the foundations as in Figure 12.8. In this figure, it becomes apparent that there are three relative vibration resonances. The most important resonance is the tuning fork vibration mode where the two wheel-heads vibrate in anti-phase. It is this tuning fork vibration mode shown at 82Hz that is most susceptible to relative excitation by the grinding force and is most strongly associated with work-regenerative chatter.
A more informative way of viewing frequency responses is by means of a polar plot of amplitude and phase as in Figure 12.9. At low frequency, the deflection is in phase with the applied excitation force. At resonance, the deflection lags the applied force. Figure 12.9 shows relative vibration responses between the control wheel and the work-plate position when the aforementioned centreless machine was vibrated at the control wheel. The first resonance was at 82Hz but was found to be reduced to 78Hz when excitation was applied between the two grinding wheels.
Additional vibration responses are found at higher frequency modes. These become important when grinding large workpieces at low work speeds. For example, the first grinding wheel spindle mode was found at 240Hz.
Light-running tests show the effect of the various motors, pumps, belts, pulleys, dressing wheels and grinding wheels. The machine should be mounted on foundations in such a way as to minimize vibrations and the rotating parts carefully balanced. The light-running amplitudes can be measured by positioning transducers at various positions as in excitation tests. Typical light-running vibrations for relative vibrations between the two wheel-heads of the same centreless grinding machine as above are shown in Figure 12.10. The grinding wheel motor running at 24.2Hz has a strong effect on the light-running vibrations. The effect is demonstrated not only at the corresponding frequency but also at approximate harmonics of this frequency at 48, 63 and 97Hz. The spindle speed was 30Hz, but since the spindle was carefully balanced there is no direct evidence of this frequency. Impulsive vibrations due to belts cause vibration over a range of frequencies but particularly at resonant frequencies identified from excitation tests.
The wheel head of some cylindrical grinding machines may be swivelled so that the spindle axis is inclined to the work axis as shown in Figure 12.23. A section in plane AB shows that the contact between the shoulder of the workpiece and the wheel is similar to that of a surface grinding operation where the wheel periphery is used. Ideally the same force/grit is desired when grinding the shoulder as when grinding the diameter, so that self-sharpening conditions occur at each grinding position. It is obvious that for most practical conditions of operating
Excessive glazing at the shoulder is less likely to occur for these conditions than when full contact at the shoulder is made by using the wheel with its axis parallel to the work axis. A very important saving is made in wheel dressing, because both surfaces can be redressed continually without loss of the face width of the wheel as indicated in Figure 12.23.
The ball-milling process is common in grinding machines as well as in reactors where various functional materials can be created by mechanochemical synthesis. A simple milling process reduces both CO2 generation and energy consumption during materials production. Herein a novel mechanochemical approach 1-3) to produce sophisticated carbon nanomaterials is reported. It is demonstrated that unique carbon nanostructures including carbon nanotubes and carbon onions are synthesized by high-speed ball-milling of steel balls. It is considered that the gas-phase reaction takes place around the surface of steel balls under local high temperatures induced by the collision-friction energy in ball-milling process, which results in phase separated unique carbon nanomaterials.
A floor grinder is mainly used for ground grinding treatment. It can effectively polish terrazzo, concrete surface, epoxy mortar layer, and old epoxy ground. It has the characteristics of lightness, flexibility, and high work efficiency. With a vacuum cleaner power socket, the vacuum cleaner power cord can be directly connected to the grinder, avoiding the trouble of two power cords when working. It is ideal equipment for floor engineering treatment. The ground-level grinder needs to be equipped with a grinding wheel for grinding. You can first use a polycrystalline diamond grinding wheel for scraping, and then use an ordinary diamond grinding wheel for grinding, which is more efficient
The cement floor grinder is the main equipment for floor construction. It is used with abrasives to roughen and smooth the ground from coarse to fine so that the surface of the concrete becomes uniform and smooth. In addition to the main function of rough grinding and leveling, the cement floor grinder can also be used with resin grinding pads to finely grind and polish the ground to further eliminate scratches and obtain a high-density, high-hardness, and high-brightness ground.
1. A dust removal device is designed, which can be connected to a vacuum cleaner for dust-free operation. The body provides a special power socket for the vacuum cleaner, which avoids the trouble of two cables during operation, which is convenient and convenient.
2. Overload electrical protection, circuit blocker can effectively prevent the motor from overheating and causing damage. The grinding motor with a 380v power supply provides you with worry-free and long-term grinding operations.
4. Avoid hard contact between the grinding disc and the ground, completely solve the uneven grinding of the grinding disc, and the small and uneven contact area between the grinding disc and the ground. The service life of the grinding disc is longer and the grinding area is larger.
The grinding disc can be flexibly replaced, and the weight is sufficient (the pressure of the grinding disc is sufficient), which is suitable for the requirements of different construction processes such as floor and concrete.
The front adjustable and flexible operation handles are suitable for grinding and polishing on the edge of the foot and a large area. The grinding disc can touch the edge of the foot for grinding and polishing at zero distance.
Excellent function, suitable for all kinds of epoxy floor, cement floor; leveling, grinding and polishing, slag removal, cleaning and other construction process requirements of epoxy terrazzo and epoxy emery floor.
The grinding disc is flexible and common. The grinding disc can be adapted to various sticky, snap-in round, horseshoe-shaped grinding blocks, grinding discs, automatic assembly line integral grinding discs (4 inches \ 8 inches 10 inches), bowl-mouth diamond grinding wheels, etc. Diversity of abrasive discs.
Stable speed change device: The front of the fuselage is equipped with a gear transmission gearbox, which can be connected to high and low gears, so that the power of the motor is 100%. At low speeds, the torque of the rotating shaft is greatly enhanced. The polishing process needs to improve the grinding, grinding and polishing efficiency.
The weight is sufficient, and the grinding disc is under heavy pressure: the machine weighs 250kg, and the corresponding pressure on the grinding disc is more than 180kg. High hardness (such as granite, polished tiles, epoxy quartz sand terrazzo, epoxy floor, cement floor) and low hardness (marble, artificial marble) ground are suitable at the same time.
When using the grinder, be sure to check whether the grinding wheel is damp or missing corners. If so, replace it in time, and install the grinding wheel firmly without looseness. During construction, construction personnel must also wear corresponding protective equipment, such as protective glasses, dust masks, etc. It is still necessary to check the various parts of the grinder, such as the protective cover and auxiliary handle, whether they are in good condition and whether they are loose when using it. When using the epoxy floor grinder, it is strictly forbidden to have flammable, explosive, and other dangerous goods around. The ground must be clean and tidy during construction. If you find that the temperature of the grinder reaches 50 degrees or more during construction, you need to stop working immediately and use it after cooling. Dont apply too much force when polishing, it should be evenly applied.
At the IDEAL concrete grinder machine, this grinding machine gives you great flexibility and control, which is very convenient for Polishing high and low hardness floors. The concrete grinder also works extremely well for smaller commercial projects. we specialize in concrete grinders. We are premier concrete grinder manufacturers who can provide the concrete grinder you need for fast, efficient grinding right now.
Our concrete grinder is very user-friendly, provides a simple, intuitive design and easy-to-clean hopper, so your team does not need to spend hours on maintenance, cleaning, or figuring out how your machine works. For a customized quotation for a concrete grinder, a grinder suitable for your business, please contact us immediately. Our friendly and knowledgeable staff members offer technical support 24 hours a day, seven days a week.
The grinding machine is utilized in a tool shop for various purposes such as finishing, forming, sharpening, cutting, roughing, snagging, cleaning, polishing, buffing, etc. However, while operating a grinding device, it may cause serious injuries to the operator or any person nearby. Hence, it is essential to observe the following safety precautions, in order to use it safely, and thus avoid any injuries.
This blog written by Mr. Yash Shah is about machine tools including workshop machinery, wood working machines, sheet metal machinery provided by Bhavya Machine Tools, a leading distributors of machine tools in India.