Title of Invention | AN IMPROVED DRESSING DEVICE FOR A CYLINDRICAL GRINDING MACHINE |
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Abstract | According to the invention there is provided an improved dressing unit which is configured such that instead of straight body parallel to the base it is machined in taper portion in such a way that the dressing point of the dressing unit is capable of approaching the grinding wheel without fouling with the shaft. Thus, the requirement for removing of the job every time is avoided whenever dressing is required and setting time is saved. The invention further enables grinding of the shaft with the dressing unit disposed on the grinding machine during the grinding operation. |
Full Text | -2- FIELD OF INVENTION The invention pertains to the field of grinding operation using cylindrical grinding machines. This grinding machine is used for the grinding of pump shafts to achieve required degree of accuracy and surface finish. A dressing unit is generally supplied with the grinding machine which plays key role in maintaining the quality of the grinding wheels used in the grinding machine. BACK GROPUND OF INVENTION While carrying out the grinding operation, periodic dressing of the grinding wheel is required whenever the quality of the grinding wheel deteriorates. A 'dressing unit', is supplied along with the machine which is used for this purpose. The grindable shaft is required to be unloaded from the grinding machine ever/time when the wheel is to dressed. Due to repeated unloading and loading of the pump shaft during the grinding operation, a possibility to develop a Yun-out' on the shaft cannot be avoided which in turn leads to run out on rotor and consequent deterioration of pump performance. Further, due to a number of settings involved, the cycle time is more and results in delayed job completion. In existing design, the body height is more than the gap between the shaft and the bed of the machine, the shape of the body is straight and it fouls with the shaft. Accordingly, the dressing unit cannot be disposed on the machine bed during the grinding operation. -3- OBJECTS OF INVENTION It is therefore an object of the invention to propose an improved dressing unit adaptable to the grinding machines which eliminates the problems of prior art. Another object of the invention is to propose an improved dressing unit adaptable to the grinding machines which is enabled to enter from under the shaft and reach the grinding wheel for dressing. Yet another object of the invention is to propose an improved dressing unit adaptable to the grinding machines which eliminates repeated loading and unloading of the grindable shaft during grinding operation. A still another object of the invention is to propose an improved dressing unit adaptable to the grinding machines which reaches the grinding cycle time and improves the quality of grainding. SUMMARY OF INVENTION According to the invention there is provided an improved dressing unit which is configured such that instead of straight body parallel to the base it is machined in taper portion in such a way that the dressing point of the dressing unit is capable of approaching the grinding wheel without fouling with the shaft. Thus, the requirement for removing of the job every time is avoided whenever dressing is required and setting time is saved. The invention further enables grinding of the shaft with the dressing unit disposed on the grinding machine during the grinding operation. According to the invention there is provided an improved dressing unit which is configured such that instead of straight body parallel to the base it is machined in taper portion in such a way that the dressing point of the dressing unit is capable of approaching the grinding wheel without fouling with the shaft. Thus, the requirement for removing of the job every time is avoided whenever dressing is required and setting time is saved. The invention further enables grinding of the shaft with the dressing unit disposed on the grinding machine during the grinding operation. |
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Patent Number | 268624 | ||||||||
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Indian Patent Application Number | 415/KOL/2008 | ||||||||
PG Journal Number | 37/2015 | ||||||||
Publication Date | 11-Sep-2015 | ||||||||
Grant Date | 08-Sep-2015 | ||||||||
Date of Filing | 03-Mar-2008 | ||||||||
Name of Patentee | BHARAT HEAVY ELECTRICALS LIMITED | ||||||||
Applicant Address | REGIONAL OPERATIONS DIVISION (ROD), PLOT NO: 9/1, DJ BLOCK 3RD FLOOR, KARUNAMOYEE, SALT LAKE CITY, KOLKATA-700091, HAVING ITS REGISTERED OFFICE AT BHEL HOUSE, SIRI FORT, NEW DELHI-110049 | ||||||||
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PCT International Classification Number | B24B53/06 | ||||||||
PCT International Application Number | N/A | ||||||||
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