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Development of China cut off disc products?

The cutting disc belongs to the cutting type and is an important cutting tool. It is the most basic and most preferred cutting tool for precision machining. It is widely used in industry. Therefore, as an indispensable tool in production, the cutting disc is likened to the reputation of “industrial teeth” and has a close relationship with modern industrial development. So what is the development of China cut off disc in today’s market?

The China cut off disc and its application technology have promoted the rapid development of modern industry and further developed the needs of modern industry, thus promoting the diversification and application expansion of cutting disc technology and products. The application of cutting discs has penetrated into the ship and ship’s machine tools, weapons, aerospace, electronic energy transportation, construction, geological metallurgy, oil and coal, light industry, textile, instrumentation, medical equipment, engineering, ceramics, refractory furniture, food processing, and other fields. The cutting disc technology affects the processing quality of engineering ceramics processing and its application, and the accuracy of the missile cover grinding speed affects the missile guiding precision; the semiconductor silicon chip materials such as grinding processing technology and quality affect the further development of the computer and the development of the information technology industry . Therefore, cutting discs and their grinding are widely used in various industries, and scientific and technological progress and the entire national economy play an important role.

5 inch resin cutting disc for metal replacement step

The electric motor type cutting machine uses the rapid rotation of the motor to drive the 5 inch resin cutting disc for metal to rotate and grind and sharpen the edges and edges of the metal. Therefore, in daily grinding and grinding work, the 125*1*22 EN12413 cutting disc becomes a common type of electric motor type cutting machine. The consumable parts are consumables, so there is a replacement, so how do you replace the cutting piece?
1. When there is a gap in the cutting piece of the cutting machine, the deformation or crack must be replaced. Turn off the main power or remove the plug. Be sure to be foolproof.
2. Then find the position of the cutting axis of the cutting blade of the cutting machine. One end of the shaft is a cutting piece and the other end is a pulley. In the middle is the bearing housing.
3. There is a cylinder protruding in the middle of the bearing box on the surface of the box. This is the shaft locking device. Its principle is to press the cylinder, the other hand rotates the shaft, the direction of rotation does not matter, it is better to swing the shaft greatly by hand. After the cylinder that is pressed at the same time encounters the small hole in the shaft, the cylindrical pin enters the hole. The shaft cannot be rotated.
4. At this time, hold down the cylinder and use the adjustable wrench to loosen and remove the fastening bolt. Remove the protective disc and paper pad, and the damaged cutting piece. Do not remove a piece of protective disc inside, put the new cutting piece in, and then install the paper pad and the protective disc in turn.
5. Tighten the bolts.
In this way, the cutting blade of the motor-type cutting machine can be replaced even if it is replaced, but it must be paid attention to when using it again. Learn more about the basic knowledge of using the cutting machine. Only when you have some understanding of the cutting piece can you carry out Operation and other applications. It is strictly forbidden to operate blindly and cause loss.

Grinding wheel grinding dosage attention matters

There are many things to be aware of the grinding amount of diamond grinding wheel. It has always been a problem that everyone is discussing. In the grinding grinding amount, the diamond grinding wheel does not know how to properly select the China supply 7″ cut off disc grinding amount of the diamond grinding wheel. In this way, the efficiency can be improved on the one hand, and the wear damage to the grinding wheel can be reduced on the other hand.

First, what is the grinding amount of the grinding wheel? The grinding amount usually refers to the grinding depth t, the grinding speed , and the grinding amount of the diamond grinding wheel should be determined according to the productivity, the roughness of the workpiece, the grinding method, the characteristics of the grinding wheel, etc.

Diamond wheel grinding wheel grinding How to choose the appropriate grinding wheel grinding wheel.

(1) Grinding depth: the grinding depth is small, otherwise the grinding wheel wears quickly and the grinding efficiency is not necessarily high. Recommendation: Generally, the 0.005~0.01 mm/oxygen stroke is suitable. The finer the abrasive grain size, the smaller the grinding depth should be, especially when the coolant is not used.

(2) Grinding speed of diamond grinding wheel: The grinding wheel speed is low, the grinding wheel wear will be serious, the productivity is low; the grinding wheel speed is too high, the sharpness of the abrasive cutting edge is reduced, and the surface speed roughness decreases as the grinding wheel speed increases. However, grinding tremor should be prevented. Flat grinding: vs=25~30m/s; external grinding: vs=12~25m/; internal grinding: vs=12~15m/s; tool grinding: vs=12~20m/s

Abrasive grinding method

Finishing (such as cutting) of the machined surface by the relative movement of the lap and the workpiece under a certain pressure by the abrasive particles coated or pressed onto the lap. Grinding can be used to process a variety of metal and non-metallic materials, the surface shape of the processing is flat, inner and outer cylindrical and conical surfaces, convex, concave spherical, thread, tooth surface and other profiles. Processing accuracy can reach IT5~01.

The grinding method can be generally classified into three types: wet research, dry research and semi-dry research.and semi-dry research.

1 Wet grinding: Also known as sand grinding, the liquid abrasive is continuously filled or coated on the grinding surface, and the abrasive continuously slides and rolls between the workpiece and the lap to form a cutting motion. Wet grinding is generally used for coarse grinding, and the fine powder abrasive used has a particle size coarser than W7.

2 dry research: also known as sand embedding, the thin abrasive cutting disc for metal metal is evenly embedded in the surface layer of the lap, only a small amount of stearic acid mixed fat and other auxiliary materials must be applied on the surface of the lap. Dry grinding is often used for fine grinding, and the fine powder abrasive used is finer than W7.

3 Semi-dry research: similar to wet research, the abrasive used is a paste-like paste. Grinding can be done either manually or on a grinder. Before the workpiece is ground, it must be processed by other processing methods to obtain higher pre-machining precision. The remaining grinding allowance is generally 5 to 30 microns. )

Selection points for molding and grinding

There are four main requirements for forming abrasive grinding wheels:
First, shape retention
Since it is a form grinding, the most important thing is naturally the shape retention ability of the 7“ cut off disc for metal!
Good shape retention can:
1 to ensure the accuracy after grinding used by7″ cut off disc for stainless steel
2 reduce trimming frequency and improve processing efficiency
Good shape retention can be achieved not only by increasing the hardness of the grinding wheel, but more importantly, the grinding wheel is stable and suitable for self-sharpening.
Second, the surface roughness after grinding
Many molded and finished products are part of each other. Therefore, good surface roughness reduces the resistance to actuation and increases product life.
Therefore, after grinding a good shaped grinding wheel, the surface roughness of the workpiece should be as fine as possible!
Third, easy to rest
If the shape retention is good, but it is not easy to trim, it will also reduce the processing efficiency.
It is not easy to trim, which means that the precision of molding is easy to be unstable, and the finished product after final processing is prone to the problem of poor dimensional accuracy.
Fourth, heat dissipation
In order to improve the shape retention, the shape grinding wheel has a lower number of tissue stages and fewer pores. However, the molding and polishing coolant is relatively difficult to enter the polishing point, and it is easy to cause problems such as burn vibration.
Therefore, heat dissipation is also a major focus when choosing molding and grinding!

new material grinding wheel

Nowadays, the selection of electroplated CBN grinding wheels and ceramic bond grinding wheels has become difficult due to the use of new cold-grinding ceramic abrasive grains of high-pressure coolant systems. However, the electroplated CBN grinding wheel is simpler to operate than the ceramic bond [URL=]durable cutting off wheel[/URL], has short installation time and low requirements on the technical ability of the operator, and provides a relatively low cost option for the CBN abrasive grain ceramic bond grinding wheel.

Ceramic grinding wheels have a high cutting speed (such as 60m / s), so they are used for large-scale production of gears. This type of grinding wheel has a longer service life than other grinding wheels (such as alumina grinding wheels). The new grinding wheel technology is used more in the worm grinding wheel of the 200mm and below gears with the largest output.

Preparation of diamond abrasive

According to the thermal stability of the diamond abrasive, the firing temperature of the grinding wheel and the refractoriness range of the bonding agent were determined. The reaction of several oxides at the firing temperature of the hot sale cutting wheel and the diamond abrasive was analyzed by using the free energy generation principle of the oxide. The chemical composition of the binder was determined. According to the glass structure theory, the content of each component in the binder was determined, the binder formulation was determined, and it was used in industrial production.

3. The preparation process of the binder. Our company used smelting method to prepare ceramic binder, determined the process of binder preparation, discussed the influence of different heating curves on the properties of smelting binders, and found that only the crystallization water and easily decomposable materials in the binder raw materials were at their decomposition temperature. After the decomposition is completed, it is raised to the smelting temperature, and the obtained binder is stable in performance; the performance test of the binder is carried out, and the holding strength of the diamond abrasive grains is large, and it is suitable for manufacturing a ceramic bond diamond grinding wheel for grinding diamond composite sheets.

4. The grinding of the diamond composite sheet was carried out. It was found that the grinding of the composite sheet mainly removes the excess diamond on the outer circumference of the composite sheet. Since the diamond is very hard, when grinding with a resin bond grinding wheel, the grinding wheel is ensured by the resin bond diamond grinding wheel. Durability, generally done very dense, basically no air holes, so the grinding force is particularly large during grinding, the damage to the spindle of the grinding machine is very large; and the grinding wheel is not sharp, the grinding wheel will make the knife when the knife is large, and it will be issued Squeaking; grinding efficiency is very low. Because the ceramic bond diamond grinding wheel has pores, the self-sharpness of the grinding wheel is very good, and the damage to the spindle of the grinding machine is small; the grinding wheel is sharp and the grinding efficiency is high; when the grinding is not performed, the size of the composite piece is good. In addition, when the composite sheet is ground, the temperature in the grinding zone is high, and the resin is not resistant to high temperature, so the resin will become soft in the grinding zone, the holding strength of the diamond abrasive is lowered, and the grinding wheel is consumed quickly; the ceramic binder does not have this problem. The grinding wheel has little noise during grinding and almost no grinding sound is heard. The advantage of the ceramic bond diamond grinding wheel for grinding the diamond composite sheet is that the grinding efficiency is high, the size of the ground composite sheet is good, the grinding noise is low, and the damage to the spindle of the grinding machine is small.

Resin grinding wheel equipment inspection

1. Raw material inspection, process inspection and factory inspection are important contents for the implementation of effective inspection and control of resin grinding wheel production enterprises, but there are few production enterprises that truly standardize management and standard cut off wheel for metalstandardization management. The main problems are incomplete systems, unimplemented functions, lax management, short control of inspection equipment, and insufficient quality of inspection personnel.

2. Inspection equipment configuration is incomplete. The inspection equipment is incomplete. The inspection equipment for resin grinding wheel has 3 large parts: rotary strength testing machine; sand blasting hardness machine (or Rockwell hardness machine)—resin slice and grinding sheet; static balance (There is also a dynamic balancer for the diamond grinding wheel), and other thin-plate grinding wheel end face, radial runout tester, inner diameter gauge, vernier caliper, grinding wheel cutting performance testing machine, etc. Inspection equipment lacks the proper maintenance and care.

3. Selection and application of resin grinding wheel phenolic resin liquid

The most commonly used humectant in the manufacture of resin grinding wheels is a phenolic resin liquid. When a normal resin liquid ratio is used, if the material is difficult to control dry and wet, a humectant such as furfural or dibutyl ester is used. Because furfural has good compatibility with liquid phenolic resin, it is still used in most manufacturers. However, the disadvantages of high corrosiveness, irritating odor, and damage to the health of the operating staff are obvious. Therefore, many manufacturers are looking for more suitable alternatives.

Introduction to profile cutting machine

Profile cutting machine is suitable for sawing all kinds of special-shaped metal aluminum, aluminum alloy, copper, copper alloy, non-metal plastic and carbon fiber. It is especially suitable for aluminum doors and windows, photo frames, plastic steel, electric wood, aluminum extrusion, paper tube and profiles. Saw cutting; hand-held press material sawing material, material is not easy to deform, low loss; precise sawing angle; low vibration, low noise; simple operation, high efficiency, single or multiple sawing together. It can be used for 90° straight cutting, 90°-45° left or right oblique cutting and so on. The grinding wheel cutting machine can cut the metal flat tube, square flat steel, 7“ cut off disc for metal, carbon steel, yuan tube and other materials. The structural features of the profile cutting machine:

1. Profile cutting machine consists of series excitation motor, transmission mechanism, shield frame, base and transferable clamps.

2. Single-phase AC motor is divided into single-insulation profile cutter and double-insulation cutter according to the fixed insulation of stator, rotor and ground.

3. The angle between the jaw of the clamping workpiece and the grinding wheel shaft can be adjusted freely from 0 to 45 degrees on the left and right. Some products can be adjusted from 0 to 30 degrees in the right position.

4. The parallel grinding wheel used in the profile cutting machine is a fiber reinforced resin sheet grinding wheel with a diameter of not more than 406 mm and a rated linear speed of not more than 80 m/s.

Grinding wheel forming step

After the grinding wheel is finished, it is not said that it can be sold to the market. There are many steps that are unknown from the molding to the completion of some inspection work.
First, drying, firing
1, drying
After the 7″ cut off disc for stainless steel is finished, it is placed on the grinding wheel frame and pushed into the drying kiln for drying. At present, it is heated by electric wire, and the temperature is kept at 90 degrees Celsius for 12 hours, and then naturally cooled. In the future, mass production can be carried out by using the heat energy removed by the firing wheel kiln. In general, the grinding wheel with a diameter of 150mm or less can be dried in the sun to achieve the purpose of drying and drying. The grinding wheel with a diameter of 200mm or more, especially the 500mm and 600mm large grinding wheel, is dried in the drying kiln, otherwise it will appear in the firing process. Cracks affect the quality of the grinding wheel.
2, firing
The kiln used for firing the grinding wheel is a batch-type self-control kiln. The temperature rise curve can be set at the controller, and then the temperature in the kiln rises or falls with the set heating curve. The whole process is automatically controlled, the temperature is uniform, and the temperature rises quickly. The quality of firing is high.
Second, processing
The surface of the grinding wheel, the inner bore and the outer circle can be machined on a conventional lathe. The special-shaped grinding wheel machine can realize the automatic working cycle of multiple processes such as car, grinding and drilling. It can accurately and efficiently complete the turning, grinding, grinding and grinding of the outer circle, section, inner diameter and hole of the grinding wheel. It is suitable for parallel, cup, Processing of bowls, plates, worms and various shaped wheels. Applicable to the professional design of grinding wheel production, the tool holder is stable, the positioning is accurate, and the machining precision is high. The spindle frequency conversion speed regulation, the speed is gradual, the machining grinding wheel has no surface scratches and reduces the scrap rate.
Automated program control, complete manual unfinished actions, simple operation method and saving manpower. The inner hole coating machine for processing the grinding wheel comprises a centering cylinder, a squeeze cylinder, a storage cylinder, a connecting tube, a core rod, a chuck and a plate with a middle hole, and the grinding wheel is supported on the pallet, and the squeeze cylinder is The paint in the storage cylinder is pushed to the core rod, and under the action of the centering cylinder, the core rod is reciprocally applied in the inner hole of the grinding wheel. Grinding wheels with different internal holes have different mandrel for hole coating. After use, the mandrel should be sealed and stored to prevent the material in the mandrel from hardening and block the coating hole. Generally, the mandrel is immersed in diesel oil. The hole-coated material can be directly filled with water to cover the material, and is not in contact with air.
Third, molding
The grinding wheel is mainly formed by molding the sleeve and then pressing it on a hydraulic press. Before molding, the abrasive should also be screened once, then weigh the weight of the abrasive needed to form the grinding wheel, pour into the molding part of the hydraulic machine, and then mix the material as evenly as possible, scrape it with a scraper, put it into the template, and press the mold on the template. Push into the hydraulic part of the hydraulic press, start the hydraulic press, and set a certain pressure. When the hydraulic press is pressurized to the set pressure, it will stop, then relieve the pressure and push out the forming grinding wheel. Measure whether the thickness of the grinding wheel is within the sequence error and then place it on the grinding wheel frame.
Fourth, product testing
The hardness of the grinding wheel is mainly detected by the sand blasting hardness machine. The machine sprays a certain volume of quartz sand onto the surface of the grinding wheel by means of compressed air with a certain pressure, and shoots the measured grinding wheel into a small pit. The depth is used to determine the hardness of the wheel to be tested. If the hardness is high, the pit is shallow, and if the hardness is low, the pit is deep, and the pit is printed with a specific value. For example, the 350*40*127 grinding wheel in the previous example, the grinding wheel with a diameter of 350mm, the hardness K, the particle size 46, can be known by looking at the table on the machine. The standard value of the hardness is 2.34-1.80, the tolerance value is 2.61-1.57, and the output is If the value is within this range, the hardness is acceptable, and if it is not, it is unqualified.