masala making machine - masala pulverizer latest price, manufacturers & suppliers

masala making machine - masala pulverizer latest price, manufacturers & suppliers

Ranchhodwadi Main Road, Near Kuvadava Road, Rajkot No. 3, Shreyas Anand Complex, 1st Floor, Opposite Parul Garden, Ranchhodwadi Main Road, Near Kuvadava Road, Rajkot - 360003, Dist. Rajkot, Gujarat

internal grind machines: maintaining components alignment |
 

 modern machine shop

internal grind machines: maintaining components alignment | modern machine shop

This article outlines the importance of this alignment, explains how to recognize the symptoms of misalignment and describes what corrective steps to take. The author, Bill Bednarski, is an applications engineer at Saint-Gobain Abrasives in Worcester, Massachusetts.

Internal diameter (ID) grinding machines, like shown in figure 1a and 1b, are used to precisely condition the form, shape and finish of an inside diameter on your workpiece. Therefore, its important to understand how the relationships or alignment of key components to each other on the machine will affect the quality of the part being ground. If these key machine components are out of align by as little as 0.001" or 25.4 microns it could have significant consequences that contribute to poor part quality. Some operators may believe that truing or dressing a new grinding wheel means the wheel will have good cylindrical geometry. But if the grinding wheel spindle is out of alignment with the diamond truing device, the wheel form will not be accurately shaped. Issues can then occur during the ID grinding process that negatively affect part quality. The same can be said about the alignment of work spindle to grinding wheel spindle or both spindles to the machines X and Z slides. The information within this article should help example why its important to understand alignments and relationships of your machines components to each other and how this enables you to produce a quality workpiece.

The components on a basic ID grinding machine that need alignment maintained are the slides, both X and Z, the grinding wheel spindle, the grinding wheel truing/dressing device and the workhead spindle. Each component should be aligned correctly and checked to ensure they achieve the following requirements:

With the relationship of these components correctly set, your machine should have a straight line of contact between work and wheel. Poor part quality, like taper or hour-glass shape can occur in your work piece if there is a misalignment of the machines components.

X and Z Slides Must Provide Smooth and Rigid Straight Line Movements (Figure 2a) If the Z slide wears and becomes slightly loose, the path that the grinding wheel travels will not be a straight line. This could cause the wheel to be dressed with a conical shape rather than a straight cylinder. When a conical shaped grinding wheel starts to grind the workpiece, the grinding wheel will first contact on the larger diameter side. The end result will be poor part form and surface finish. Excessive wheel wear may also occur. Therefore, be sure to inspect for rigid, smooth slide movement per your machine tool builder recommendations.

Workhead and Grinding Wheel Spindles Centerlines Must Be in the Same Plane and Parallel with the Z Axis. (Figure 2b) In some manufacturing plants, it is common to have several grinding wheel spindles for one grinding machine to cover a wide range of wheel speeds. Different speed rated grinding wheel spindles allow for optimized wheel speed ranges needed to grind different part sizes. When one grinding wheel spindle is replaced with another, its important to check that the correct alignment is re-established. The new grinding wheel spindle centerline may be on the same vertical plane as work spindle and truing device but it could be off parallel horizontally with the Z axis and with the other centerlines. Grinding wheel spindles that are off parallel from the truing device can create a wheel OD that has taper trued into it or conical form. You can check if the grinding wheel spindle is horizontally parallel with the use of a magnetic base mount indicator. The indicator should have at least 0.0001" resolution. First, be safe and make sure none of the spindles are turned on or rotating. In machine setup mode, secure the base of the indicator to a fixed point on workhead spindle. The tip of the indictor will need to be set to touch on the horizontal side of the grinding wheel spindle diameter (at 3 or 6 oclock) or on a grinding wheel quill thats known to have a straight, consistent diameter. Once your indicator is set, slowly move the grinding wheel spindle slide in towards the workhead and then back. The slide travel length should be as long as possible. You should not see any more than 0.0002" deviation during slide travel. Repeat this process for the dressing system by securing the indicator base to a fixed point on the dresser system.

Another issue to be aware of when replacing grinding wheel spindles is to check that the spindle is not vertically tipped. A vertically tipped spindle would result with the spindle centerline not being on the same plane as work and dress system centerlines (Figure 3). When truing and dressing the wheel, the form can become hourglass or tapered shape. A poor shape dressed into the grinding wheel OD cannot produce a good quality workpiece. After replacing a grinding wheel spindle always 1) be sure to inspect that the spindle centerline height is in the same plane as the work spindle and dress system and 2) the grind wheel centerline is parallel with the centerlines of work spindle and dress system. This can be checked in the same manner described before for the horizontal alignment but set the tip of the indictor to touch on the vertical side of the grinding wheel spindle diameter (at 12 oclock) or on a grinding wheel quill thats known to have a straight, consistent diameter. The slide travel length should be as long as possible and you should not see any more than 0.0002" deviation during slide travel.

Truing/Dressing Device Contact Point Must Be in the Same Plane Thats Established By Both Workhead and Grind Wheel Spindles. (Figure 4a & 4b) Today, many ID grinders can have more than one dress system available to use. This can require switching in and out different dress spindles or changing from a spindle to a stationary dress tool device. When changing any component on the machine you should always check that all components centerlines are on the correct vertical plane. Be sure that the point of contact across the wheel diameter is the same for both workpiece and dress system. This will assure proper form dressed on the wheel OD and the process should be able to maintain the tolerances required for your workpiece. When the grind mode is set up for diamond sizing or without an in-process gage the wheel or work is fed to a qualified end position. As the wheel gets dressed, the machine will automatically adjust its infeed travel amount to compensate for an increasingly smaller wheel diameter. This will maintain good finish part size, piece to piece. If the dress system centerline is significantly above or below the grinding wheel centerline your workpiece finish diameter will drift oversized. This is due to the machines dress compensation being set for a fixed amount each time the grinding wheel is dressed but the actual amount dressed off the wheel is less. Therefore, the machine compensates for the set in-feed dress amount but the wheel diameter is actually larger so your workpiece final size will trend oversize. Theres simple way to check if your dressing tool is on center with the grinding wheel diameter. First, be safe and make sure none of the spindles are turned on or rotating. Get a piece of flat ground steel stock thats approximately a 6" long, " wide and 1/16" to 1/8" thick. In machine setup mode, move the grinding wheel towards the dressing tool. When you get close enough hold the flat stock vertically between the dressing tool and the grinding wheel. Now slowly continue to move the grinding wheel towards the dressing tool until the flat stock is lightly pinched between the grinding wheel and dressing tool. If the dressing tool is in the same plane as the grinding wheel spindle the piece of steel flat stock will remain vertical. If the dressing tool is contacting the grinding wheel below wheel centerline the flat stock with tip in towards the dressing tool. If the dressing tool is contacting the grinding wheel above wheel centerline the flat stock with tip in towards the grinding wheel. Consult machine tool builder recommendations on the best way to correct improper alignment.

Remember take the time to inspect your ID grinding machine components. Be sure that they are correctly aligned to each other. A properly aligned ID grinding machine along with the right wheel specification and optimized grinding cycle parameters will be a very cost efficient method to produce your workpieces.

Achieving consistent and quality results from the centerless grinding process requires an understanding of the basic fundamentals. Most application problems associated with centerless grinding derive from a misunderstanding of the basics. This article explains why the centerless process works and how to use it most effectively in your shop.

The double-disc grinding process is consolidating its position in automotive applications but is moving into other industries. Double-disc grinders are now easier to operate, and they have added capabilities for control flexibility, precision process control, faster changeovers, and grinding of nontraditional materials.

tool grinding machine, sharpening center grinding machine - all industrial manufacturers - videos

tool grinding machine, sharpening center grinding machine - all industrial manufacturers - videos

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bsm india

bsm india

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itm international tool machines

itm international tool machines

Mr. Karl H. Giebmanns, the founder of ITM, began his career in 1969 as a Chief Engineer at Erwin Junker Machine in Nordrach, Germany. Upon immigrating to the United States, he worked as Plant Manager and Chief Engineer for the U.S. Division of Hertlein. In 1981, Mr. Giebmanns, armed with many innovative ideas, and an eagerness to design and manufacture his own line of the grinding machines, established ITM in Westport, Connecticut. ITM was founded with the purpose of supplying application driven, high value, production grinding machines to a worldwide customer base.

In 1992, in order to meet the demands of an expanding customer base of major manufacturers in cutting tool, medical and automotive industries, ITM moved its design and manufacturing to a new, larger facility in Palm Coast, Florida.

Today, infused with funding from Florida Grinding Group, ITM continues to design machines, develop software, assemble components and install all the machine electronics at the Palm Coast facility. All machine components are from top tier OEM vendors in the United States, Germany, and Japan. With a strong focus on grinding technology, ITMs success is a result of the accumulated grinding knowledge gained by ITM personnel through exposure to a wide variety of diverse industrial markets and grinding applications. ITM offers turn-key solutions with the most productive and cost-effective grinding and coolant filtration systems.

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