US1096189A - Method of grinding rolls. - Google Patents

Description

- 0.]11. NORTON METHOD or GRINDING" ROLLS.

A PPLIOATIOH FILED SEPT. 19, 1913.

1,09 1 9 Batented'May 12, 1914.

2 SHEETS-SHEET 1.

' N M 9 2265565 N g Patented May 12, 1914.

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- p. H. NORTON v METHOD OF GRINDING ROLLS. APPLICATION FILED SEPT-19,1913

muumu UNITED STATES PATENT OFICE.

CHARLES H. NoaToN, or WORCESTER, MASSACHUSETTS, ASSIGNOR To NoaToN GRINDING COMPANY, or WORCESTER, MASSACHUSETTS, A CORPORATION or MASSACHUSETTS.

METHOD OF GRINDING ROLLS.

Specification of Letters Patent.

Patented May 12, 1914.

Original application filed June 14, 1911, Serial No. 633,021. Divided and this application filed September 19, 1913. Serial No. 790,804.

To all whom it may concern:

Be it known that I, CHARLES H. NORTON, a citizen of the United States, residing at \Vorcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Method of Grinding Rolls, of which the following is a specification.

This invention relates to a method of grinding rolls and constitutes a division of my prior application, SerialNo. 633,021,

filed June 145, 1911.

The object of my invention is to provide an improved method of grinding rolls by which rolls of the character hereinafter described can be quickly, accurately and economically reground.

The rolls to which my improved method is articularlyapplicable are of relatively arge size andweight and are widely used in rolling metal, in milling, crushing and grinding machinery, in printing and paper making machines, and in many other lines of, industry. ArolLof this character usually comprises a central cylindrical portion and cylindrical bearings of reduced size at the ends of the central portion. The roll may also be provided with extensions beyond the hearings to which driving connections may be fitted. Such rolls are usually originally turned and ground upon centers but as they are subject to great pressure and strain when in use, the working peripheries rapidly lose their exact shape and require regrinding. In some lines of work this has to be done very often as the nature-of the work requires that the rolls be kept to exact cylindrical shape, even to the thousandth vof an inch or less. The regrinding of these rolls involves considerable difficulty as theoriginal centers are sometimes cutoff after the roll is made and if this is not done, the centers are. often bruised or their accuracy isotherwise destroyed. The regrinding of the roll upon its original centers is usually impracticable andth'e present practice is to support and rotate the roll on its bearings fectly cylindrical surface. It should also be noted that the working periphery is usually of considerably larger than the bearing surface and that any irregularity in the bearings may be. magnified at the working periphery, thus produc-.

ing greater inaccuracies in the working surfaces than are present in the bearing surfaces. I have discovered that this.regrind- 1ng operation may bevery successfully performed by supporting a roll on the periphery of its bearings, rotating the same while thus supported, grinding the periphery of the bearings while it is thus supported and rotated, and thereafter regrinding the working surfaces of the roll while it is supported and rotated upon its reground and accurate bearings. It is found in actual practice that when this method of procedure is used both the bearing and the working sfirfaces can be brought to exact cylindrical s ape.

My improved method can -perhaps be best understood by reference to the accompanying drawings illustrating one form of machine by the use of which themethod can be practised.

In the drawings Figure 1 is a top plan view ofa portion of a grinding machine;

diameter Fig. 2 is an end elevation of the same; and

Fig. 3 is a detail sectional view of one of the bearing supporting members.

Referring to Fig. 1, the letter R indicates the central or working portion of a roll having cylindrical bearing members 13 and also having extensions E by which. the roll may be driven. Any common form of actuating means (not shown) may be utilized to rotate the roll upon its bearings. A grinding wheel is indicated at 7W, mountedupon a support 10 which is carried by a table 11, which in turn is arranged to slide longitudinally upon ways 12 and 13 secured to the main frame 1 1 of the grinding machine. Feeding mechanism indicated at 15 is provided by which the wheel W may be caused to advance or recede with respect to the work and a feed screw 16, shown in Fig. 1, provides means for moving the wheel table longitudinally of the work. The bearings B of the roll are supported upon a plurality of radially adjustable bearing members 17 mounted in radial slots in a bearing frame 18 which may be arranged for longitudinal adjustment along a guide 19 formed integrally with the frame 14. Each bearing member, as shown in Fig. 3, is provided upon its rear side with a pair of inclined surfaces 20 which rest upon a pair of oppositely disposed wedge shaped blocks 21 which are mounted to slide longitudinally of the radial slots. A compound right and left hand screw 22 is threaded into openings in each pair of the blocks 21 and is pro vided with a collar 23 received within a slot in the frame 18. The collar serves to prevent longitudinal movement of the screw relative to the frame 18 and it will be evident that rotation of the screw when thus confined will result in simultaneous, longitudinal movement of the blocks 21 and in radial adjustment of the member 17.

An extension 2 upon the screw provides for the attachment of a Wrench for its convenient manipulation. It will be noted byreference to Fig. 2 that the upper bearing members 17 at the front of the hearing are disposed in a plane substantially below'the center of the roll R. This arrangement permits the wheel to be advanced to the position indicated by dotted lines at W without interference of the bearing members with the operation of the wheel in 'rinding the surface B. The bearing memers at the rear of the machine are disposed" in a somewhat higher plane to counteract the thrust of the grinding wheel against the roll. In the practice of my improved method by the use of this machine the bearings B arefirst calipered and the supports 17 are then adjusted bythe use of any convenient setting mechanism so that they will be arranged-on an arc slightly less in diameter than the dia eter of the bearings B indicated at l/V and the working periphery of the roll is ground while it continues to rotate upon its resurfaced bearings. The roll is thus restored to its original accuracy of cylindrical form both with respect to its bearings and also with respect to its Working periphery and it is also reground so that its bearings and its working periphery are developed upon the same axial line.

I do not wish my improvedmethod of grinding rolls to be limitedin any Way by the apparatus herein disclosed as it is evident that many other forms of apparatus might be designed by those skilled in the art by the use of which this method might be carried out -without departing from the spirit and scope of my invention, but

What I do claim is l. The method of grinding the bearings of a roll which consists insupporting and rotating a roll on the peripheries of its bearin s and 'rindin said bearin 's while the b b b 23 roll is thus supported and rotated.

2. The method of grinding a roll whic consists in supportin and rotating the same on the peripheries 'o.' its bearings, grinding said bearings while the roll is thus supported and rotated and then grinding the working periphery of the roll while the same is retated on its resurfaced bearings.

' 3. The method of grinding a roll which consists in supporting and rotatin the same on its bearings on a plurality 0 supports adjusted to arcs slightly smaller in diameter than the diameter of said bearings grinding said bearings until the same are cylindrical and run truly on said supports and roll while the same is rotated on its resurfaced bearings.

41. The method of grinding rolls which then grinding the working peripheryof the consists of calipering its bearings; setting a plurality of radially adjustable supports to an are slightly less in diameter than the diameter of said bearings, rotating said roll on its bearings on said supports, grinding said bearings to cylindrical form of the same diameter as said adjusted supports, and then grinding the working periphery of the roll while it is rotated on its resurfaced bearings in said supports.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

CHARLES H. NORTON, Witnesses:

ALFRED J. Doriui, J. llnunniir JoI-iNsoN.

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