Centerless grinder centering grinding

Workshop specializing in cylindrical grinding often need to convert the type of work, the workpiece processing conversion from the inside diameter, outside diameter grinder centerless grinder. If you can understand the rational behind this conversion, then be able to determine the centerless grinder exactly where to play its role. 

When a part is sent to the grinding workshop process, the parts have been milling, turning, heat treatment, and other operating process. The process will create more added value to the part, and the time spent by each process may be more than people expected. In addition, there is the pressure of competition from other advanced technology. However, is located in the Pennsylvania State M & S Hatboro grinding company boss Mr. John Shegda this with confidence, because the kind of work he just "Shoudaoqinlai" things, in fact, this competition mainly from turning technology his processing plant is in a flourishing excellent situation. Since 2006, the scale of his processing plant has been expanded three times, most of its processing equipment is an upgrade. 

The recent success of the workshop, the majority should be attributed to the correct allocation of its resources. They should know that when the deployment of forces, centerless grinding technology in cylindrical grinding, and should be used when other methods. In order to maximize the level of high-precision machining of workpieces and profits, the workshop is usually associated with outside diameter, inside diameter machining some adjustments to the workpiece processing on the latest purchase of through-feed centerless grinder. In order to achieve this aim, the grinding subcontractor demonstrates not only the most effective level of processing centerless grinder, but also demonstrates today centerless grinder has a variety of functions.

Figure 1 Monza 410 Centerless Grinder, it can make the workshop to the geometry of the high precision control parts, in order to achieve the high-end processing requirements. After completion of this process, the following work is relatively simple

Due to a lack of understanding of the dynamics of this process and therefore can not understand the high-precision grinding technology with amazing force. However Shegda Mr. abandoned this the grinding concept, so this technology to be able to play the biggest role. He and his 14 employees in a more logical way to apply this type of grinding technology. They learned Mr. Meron Shegda left their analytical techniques and knowledge of grinding, opened the business in 1957. Since 1990, Mr. the John Shegda President, and Mark Shegda incharge of M & S Mr. Meron Shegda, a chess enthusiast, his interest in the game to help him further improve his ability to analyze, proved his ability to create this business is very beneficial. 

Mr John Shegda said: "what we have done and know everything should be attributed to my father and he is a person of the smartest people I know." In those days, companies rely entirely on in his mind, as well as a variety of processing equipment, including CNC CNC machine tools , automatic machine and manual machines. The company's business scope includes all types of cylindrical grinding, mainly to provide services for the medical and aerospace industries. M & S company can be processed for these industries grinding parts in any form, including a plurality of processing steps, various angles, taper and radius. About 500 customers, including many of the machining workshop, M & S, to help them processed again, to amend certain parts of the non-circularity, and also called for the speedy delivery. 

Since recognized the centerless grinding performance, M & S started to apply it in practice. Fact, centerless grinding technology to further improve the confidence of the processing plant, enabling them to successfully complete the processing tasks in accordance with thehigh-precision roundness and tolerances size requirements. 

Complex work is required to complete Shegda President and his staff need to complete the task. These high-precision workpiece about 1 to 10,000, its roundness and concentricity demanding precision up to 0.02in (1in = 25.4mm). 

Shegda President explained: "We undertake most new workpiece diameter and roundness tolerances size requirements is very high (generally parts of the aviation industry), and some even parts of the medical industry, small shape, the processing required to achieve stunning proportions. " 

Sophisticated technology and the basic principles of 

Centerless grinding process grinding type of workpiece is not a problem, and will succeed. , M & S whenever possible will be using this processing method. 
Shegda Mr. explained: "The most important is a centerless grinding faster, generally speaking, this process has a high machining accuracy, because the machine does not need to run to the very small incremental steps. Therefore, we are able to control tolerance dimensions. " 

Centerless grinding and cylindrical grinding process is the difference between the workpiece without mechanical restrictions. Cylindrical Grinder is generally the workpiece clamping into the top or chuck, the workpiece against the grinding wheel rotating grinding, centerless grinder without any clamp the workpiece center point. It relies on the principle of the interaction force between the grinding in the three critical components, these three components are wheel, the adjusting wheel and the workpiece vane. 

In the centerless grinding process, the workpiece paddles used for the outer diameter of the workpiece support. Workpiece blade plate is mounted on the high speed grinding wheel and a smaller diameter between the low-speed regulating wheel. In order to make the workpiece to achieve the purpose of rotating and grinding, the workpiece paddles must be installed to a position, i.e., the centerline of the workpiece should be located in the center line of the grinding wheel and the regulating wheel. 

About 2 years ago, the shop has made ​​a strategic investment, in order to further optimize the centerless grinding process. The shop purchased a Monza 410 CNC CNC runs through feed centerless grinder. Prior to this, only 6 of the workshop revamped centerless grinder.Although these daily processing accuracy of the transformation of the grinder can be maintained within 0.0001 inch tolerances size range, but it is impossible to achieve the requirements of the ultra-precision tolerances, because the processing requirements of these parts are the medical and aerospace industries to their proposed 's. In order to be able to undertake high precision machined parts, the workshop has been added to a Monza 310 type through feed centerless grinder for processing flat head pin, flat head reel and diameter of0.020in a miniature medical equipment parts. 

Mr. Shegda said: "If we had the machine for roundness, flatness or the diameter of the dimensional accuracy of the struggle, we will not be able to deal effectively with such a demanding high-end workpiece. Monza centerless grinder so that we are able to compare geometric accuracy of the level of precision control components to meet the processing requirements, reduce the complexity of the workpiece in any case, the work of this nature is still not able to so easily accomplished, but we can at least parts inherent in the problem and focus on, and not to deal with the limitations of the equipment. " 

For the processing plant, part of the value in its new grinder has quickly debug settings. In fact, the operator generally can be completed within 15 ~ 20min the centerless grinding workpiece basic debug settings. Whether in the old-fashioned machine and Monza centerless grinder quickly debug settings workpiece, M & S Company is very critical, because each machine may need 6 to 8 times the workpiece chucking debugging daily. 

Mr. Shegda said: "If, for us, according to the nature of our work and constant debug card number of matched only spend 1h to complete everything is realistic." 

M & S is not overly dependent on a clever arrangement, but Monza 410 type runs through feed centerless grinding machine to complete the work. This machine has the characteristic of "Strengthening correction", so it allows the operator to the operation of the machine running the adjustment and correction diameter size. 

The roundness of the wheel type, condition, and the amount of processing materials require cutting also affect the the debug settings important factors. Mr. Shegda reason that you want to configure through the feed centerless grinder reasons, it is hoped to have a "back-up" dimensions in a precision workpiece machining process. 

Mr. Shegda explained: "The worst thing is to be able to do to maintain the consistency of the size, stop using it throughout the feed centerless grinder in order to be able to effectively to reach 0.000 01in incremental level precision, we can Monza 410 type centerless grinder on the precise control of size, without having to stop the operation of the machine. " 

In addition to the basic knowledge to understand centerless grinder and appropriate evaluation of the equipment needed for the implementation of the process operation, the processing plant staff must also understand the rational allocation of equipment, which have a great impact on profit margins and the overall effectiveness of the work on the shop floor.

Even workshop outer diameter grinding is considered the best means of processing, the roundness of the processing by this method can be achieved ppm 10 ~ 20in level, relative to other methods, can maintain high accuracy, but The two methods are not necessarily suitable for all processing. Mr. Shegda found that some customers often mistakenly believe that they only need the kind of grinding between the thimble, but in fact, they need the processing capacity centerless grinder. For example, for a relatively large part of the length and diameter of the outer diameter grinding may generate some problems.

Figure 2 is for a relatively large length and diameter of the workpiece using the grinding of the centerless grinder, such as the following precision punch and die shows the kind of parts

Shegda President explained: "If parts need grinding long very thin, so it will be more difficult to cylindrical grinding. Contrary, centerless grinder will be handy if one part of the diameter of 0.250in, length 10in total outside diameter tolerances processing 0.0001in,processing will become a "nightmare" in the cylindrical grinder If the parts with a flat head above, we can use the through-feed centerless grinding machines, grinding will much more simple and easy, even on a larger infeed machine processing key is the part three sides must be in the form of support: The carbide alloy paddle is located in the lower part of the adjustment wheel on the side, the grinding wheel is located in another side as long as three support surface in a normal position, then in theory, grinding a direct round bars should not be much of a problem, of course, the theory is, after all, are very different from the actual, but If you truly understand the processing of parts, then it must be able to obtain a very high tolerance dimensional accuracy. " 

Grinding pursuit of a greater challenge, suggesting that this process with Hard Turning compete and contend. For centerless grinding, the main competition is not from the grinding workshop, but from other competitive technologies. 

Shegda President explained: "We think Hard turning is a very 'competitors', because now processing plant can effectively turning machining after heat treatment of steel workpiece machining accuracy of up to 0.0005 in many cases even processing can achieve higher accuracy in order to develop and expand our business, this process actually allows us to shift to a more critical and more challenging work. now, only those who are able to achieve high accuracy and high quality the work, as well as the breakthrough technology of the times to be successful.

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