The repair and maintain of grinding wheel

During grinding abrasive wheel in friction, compression, its rounded edges and gradually becomes dull, or when grinding ductile materials, debris often impaction in the pores in the surface of the grinding wheel, grinding wheel surface blockage, Finally, the loss of the grinding wheel cutting ability.

 At this time, it will produce between the grinding wheel and the workpiece slippage, and may cause vibration and noise occur, the grinding efficiency decreases, the surface roughness is deteriorated. At the same time due to the increased grinding force and grinding heat, causing deformation of the workpiece and the precision grinding impact, serious cases will make the surface grinding burns and hairline cracks. In addition, due to the different abrasive grinding wheel hardness unevenness and working conditions, the working surface of the grinding wheel wear is uneven, ranging from various parts of the grain shedding much, resulting in the loss of the wheel shape precision, accuracy and influence the shape of the workpiece surface roughness. Where you encounter this situation, the wheel must be trimmed, cut on the surface layer of abrasive grinding wheel surface re-exposed sharp abrasive finishing, grinding wheel cutting ability to restore and shape accuracy.

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 A wheel attribute categories

There are two characteristics determine the type of grinding wheel:

1. From the material is divided, namely products used abrasive. Abrasive wheel determines the performance of different abrasive wheel optimum scope has changed. Specific points, abrasives are the following: corundum abrasives, abrasive corundum, chromium corundum abrasives, abrasive corundum crystal, black corundum abrasives, abrasive silicon carbide green and black silicon carbide abrasive, micro-porosity wheel, grinding wheel small pores, large porosity wheel, grinding wheel shoes, grinding wheel timber, paper mill wheel, grinding wheel, and other cloth.
2. From the shape of the distinction, namely the appearance of style products. The final shape of the finished abrasive wheel is different, the name is different.
      Of course, the purpose is quite different. Preliminary points, mainly flat grinding wheel (circle, which both sides of the plane) and shaped grinding wheel (irregular wheel) two categories. In actual use, flat grinding wheel in a dominant position, but because of its wide range of special-shaped grinding wheel, it makes up for deficiencies flat wheel. Double-bevel wheel, single-bevel wheel, protruding wheel-sided, single-sided concave grinding wheel, double-sided concave grinding wheel, sheet wheel, cylindrical grinding wheel, cup grinding wheel, bowl-shaped grinding wheel, dish wheel, cylindrical grinding, round Bevel grinding, spherical grinding head, Whetstone square, rectangular stone and so on.

Second, the hardness of the wheel selection and use

     Wheel hardness: the hardness of the wheel selection and use of, for example, in normal use, the hardness of the wheel is the degree of difficulty in the sand wheel surface grinding process off, that is as strong as the binding agent bonded grinding wheel grit. If the grinding wheel hardness is low, easy to fall off the sand, whereas the hardness of the wheel will be high, not falling. In order to meet the requirements of different grinding, you need to have a variety of grinding wheel hardness grade of grinding wheel selection, in order to meet the needs of actual use, of abrasive hardness level according to the provisions of GB2484-84, fourteen points of the seven-stage small stage

The Reason For choosing JC Abrasive Grinding Wheel

The Reason For choosing JC Abrasive Grinding Wheel
Equipment advantages: Good products from good equipment! Year-abrasive will all adopt international advanced automated production lines, high degree of automation tooling equipment applications, not only greatly enhance the production efficiency, but also greatly ensure the stability of product quality, making our products more competitive.
Environmental advantages:  Jc abrasive industry professional committed to the production process design. After the completion of the plant, its environmental design can truly achieve zero pollution levels, far beyond the state's environmental standards.

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The usage of Abrasive grinding wheel

The usage of Abrasive grinding wheel
1, Before installation, you should carefully check the wheel to ensure that no damage, voiceless deformation;
2, Ensure that the machine does not exceed the speed of operation outside the box marked on the wheel or on the

maximum speed limit;
3, Installation, pay attention to check the flatness of flanges, the correct diameter and appropriately adjusting

washer;
4, The operator at the time of operation, safety glasses, and should take appropriate protective measures;
5, Select the matching device can not be forced to install or change the size of the mounting hole;
6, The operation work cutting operation is strictly prohibited idlers standing Cutting orbit around;
7, Before Cutting, should allow the newly installed wheel commissioning less 30 seconds;
8, Prior to use, can not be struck, bent wheel.

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Characteristics of Centerless cylindrical grinding

      1. Two-wire External Grinding center hole does not play, do not support the workpiece thimble. Since the center of the workpiece uncertain, the grinding allowance is relatively reduced.
      2. External grinding mill can not axially grooved workpiece, grinding perforated workpiece, does not correct the position of the hole axis, low concentricity of the workpiece.
      3. Cut inside his cell under normal circumstances can only be processed on a roller rolling on the workpiece can therefore, particularly suitable for grinding sets of groups, and other thin-walled parts. Grinding sets of parts because the parts are positioning themselves cylindrical reference. Therefore it can not be corrected within the original uranium with external error between.
      4. Centerless grinding time maneuvering and loading and unloading time coincidence, easy to implement grinding process automation, high production efficiency.
      5. In the centerless grinding process, the change in position of the workpiece center depends on the size of the original error of the workpiece before grinding, process system rigidity, grinding, dosage and other process parameters (high workpiece center, pallets angle, etc.);
      Stability 6 centerless grinding movement of the workpiece, the machine depends on the uniformity of the transmission chain, the workpiece shape, weight, guide wheels and supporting materials, surface morphology, grinding with a star and other process parameters.
      7. Centerless grinding machine for a long time to adjust, to adjust the machine's technical requirements are also higher, does not apply to single and small batch production.

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The balance of grinding wheel

The balance of grinding wheel
Install wheel on the grinder should pay particular attention. Because the wheel at high speed working conditions, should be carefully examined before use, does not allow cracks. Installation must be firm and should be static balance adjustment in order to avoid personal and quality accidents.
Between the wheel and the wheel shaft or bore cylindrical flange, not too tight, otherwise the thermal expansion of grinding, grinding wheel easy to bursting, not too loose, otherwise prone to eccentric wheel, loss of balance, so as to cause vibration. Usually with the gap of 0.1 ~ 0.8mm, high-speed grinding wheel gap to be smaller. When the wheel clamping flange with two flange diameter should be equal to the outer diameter shall be not less than 1/3 of the outer diameter of the wheel. Application between the flange and the end face of the grinding wheel cardboard or oil and rubber gaskets and so do the pressure evenly distributed, the tightening force of the nut can not be too large, otherwise the wheel will break. Note that the fastening screw rotation, and the wheel should spin to the contrary, that is, when the wheel is rotated counterclockwise, with right-hand thread, so that the grinding wheel under the force will drive the screw nut more tightly.

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The Safety in grinding wheel using

The Safety in grinding wheel using

before use:

1. Before starting the machine, check the machine guards and various operations of the reset switch is adjusted position and firmly.

2, the use of shields, should be covering at least half the wheel diameter.

3, wheel mounted on the grinding machine spindle, you must be idle, idle time is less than 5 minutes, and when idling, the operator shall stand in a safe location, or forbidden to stand in front of a tangential direction of the wheel.

when using it:

1, with the outer peripheral surface of the wheel face to do, do not use the side for grinding, grinding wheel in order to avoid fragmentation.

2, during grinding, prohibit the use of lever pressing the workpiece to increase the pressure on the wheel.

3, or grinding wheel dressing, the amount of feed should be appropriate, and the use of specialized tools dressing wheel dressing. And should wear protective equipment.

4, the front wheel stops turning the coolant should be shut down, continue to rotate the wheel to do grinding fluid thrown up, so as not to affect the balance of the performance wheel.

5, prohibits the use of binding agents are damaged wheel grinding fluid. Not allowed to use the local coolant temperature is below 0 degrees Celsius.

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diamond grinding wheels for polishing stainless steel

diamond grinding wheels for polishing stainless steel


1. High grinding efficiency than that of  diamond grinding wheels.

2. High abrasion resistance and less abrasive consumption

3.Small grinding force and low grinding temperature

4.High grinding precision of the work piece, good surface quality and good maintenance of the shape of workpiece

diamond grinding wheels for polishing stainless steel
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Factors which can affect the grinding wheel speed

Factors which can affect the grinding wheel speed
      Grinding has a long history, with the emergence of a large number of fresh material and application has brought an unprecedented breakthrough for the future of the show. Diamond grinding process is a more complex process, multivariable interaction process, always changing them, diamond grinding wheel is removed quantitative workpiece material to obtain a higher surface quality and precision.
      Wheel speed on the line is more complex when the wheel was increased from 28.8m / s to 33.6m / s when the speed increased only 16%, while the blocked amount increased threefold. Because of the increased wheel speed of the abrasive grains of the maximum depth of cut is reduced, chip cross-sectional area decreases, while the number of cutting and grinding heat increased so that clogging increases. But when high wheel speed to a certain extent (eg reach 50 m / s or more), the amount of clogging wheel but declined significantly. So choose the best to avoid wheel speed 20m / s to 50m / s this speed grinding.
      Practice has proved that diamond grinding wheel speed to prepare, wheel loading increased threefold, so the higher the speed of the workpiece, abrasive load rain, abrasive cut more shallow depth, the cutting cross-sectional area decreases, while grinding thickness increases, heavier abrasive passivation, increase the grinding wheel on the workpiece extruded layer, a diamond wheel corresponds to harden characteristic change occurs, thus resulting in the clogging of the grinding wheel.
      Wheel size, hardness, structure and wheel speed grinding methods to optimize the grinding process to establish a reasonable grinding parameters and summed up the law, it is an effective way to guide the production, but also grinding technology research should focus on the content.


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The use of carbide wheel

The use of carbide wheel

    Carbide grinding wheel with a series of excellent performance, wide range of uses, over time use is still expanding, the main purposes are as follows:
    (1) Cutting Tools: Carbide grinding wheel can be used as a wide variety of cutting tools. Carbide cutting tool grinding wheel of about one-third of the entire amount of carbide grinding wheel production, which accounted for welding tools 78% for indexable cutting tools accounted for about 22%. CNC tool grinding wheels and carbide indexable cutter with only about 20% of the carbide grinding wheel, in addition to solid carbide drill grinding wheel, grinding wheel small garden saw solid carbide, carbide micro drill grinding wheel and other cutting tools.
    (2) geological mining tools: geological mining tools Carbide wheel is also one of the major purposes.
    (3) self-sharpening, grinding heat a small, easy to plug, reducing the phenomenon of grinding work burns;
    (4) Titanium grinding wheel CBN grinding wheel is the best choice.
    (5) wear parts: wheel with carbide wear parts made of a nozzle, guide, piston, ball, cleats tires, snow board, etc. abound.
    (6) high pressure high temperature chamber: The most important use is the production of synthetic diamond with a top hammer, pressure tanks and other products, the top hammer, carbide wheel cylinder pressure accounted for the total production of carbide grinding wheel 9 %.
    (7) represents the degree of binding binding agent (BOND) holding abrasive grains intensity level. Alphabetical divided into 26 categories. By the heat-resistant steel and high hardness (HRC55 or more) of the alloy wheel made of steel precision parts grinding and final grinding. These parts because with ordinary abrasive abrasive blunt excessive consumption or can not be obtained with high accuracy.

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Begin to manufacture Diamond/CBN Grinding-wheels for Roller Grinding

Diamond/CBN Grinding-wheel was successfully developed for Roller-Grinding under the premise of our experiences and theories. This kind of Grinding-wheel pocess the merits of Middle, Big and Minitype Air-hole; Soft tissure; Supersoft hardness; Excellent Cutting capability; Fast Grinding and great shapeness; Anti-burning of workpieces etc.

Grinding-wheels are manufactured into different models and patterns according to specfic grindings and grinders. Ordinary Grinding-wheels include: Plain Grinding-wheel, Tubbish Grinding-wheel, Cup Grinding-wheel, Dished Grinding-wheel and Taper-cup Grinding-wheel etc.
 We manufacture Diamond/CBN Grinding-wheels and abrasive-materials; Adopt of field of Glass and ceramic grinding; Metallic Grinding-wheels and Resinoid Grinding-wheels used in Glass-processing field; Polishing wheel; Diamond tools used to process magnetic and hard-alloy materials; in addition to irregular Diamond/CBN Grinding-wheels suit to different grinding.
Choose of Grinding-wheels:
1. Soft and Upper Grit-number Grinding-wheel should be choosed for grinding hard materials. In corresponse the hard and Lower Grit-number Grinding-wheel suit to soft materials. It will save the usage of Grinding-wheel as well as anti-jam.
2. Coarse-grinding choose soft Grinding-wheel. Fine-ginding should use hard Grinding-wheel.
3. Large plane-grinding or thin-workpiece grinding should have lower Grit-number and soft Grinding-wheels. In order to keep shape and anti-burning of workpieces.
4. Shaped Grinding should use Upper Grit-number and hard grinding-wheel to keep the outline of the wheel.

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